[client, management] auto-update (#4732)

client/android/client.go

@@ -122,7 +122,7 @@ func (c *Client) Run(urlOpener URLOpener, isAndroidTV bool, dns *DNSList, dnsRea
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder)
+	c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder, false)
 	return c.connectClient.RunOnAndroid(c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, slices.Clone(dns.items), dnsReadyListener, c.stateFile)
 }
 
@@ -149,7 +149,7 @@ func (c *Client) RunWithoutLogin(dns *DNSList, dnsReadyListener DnsReadyListener
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder)
+	c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder, false)
 	return c.connectClient.RunOnAndroid(c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, slices.Clone(dns.items), dnsReadyListener, c.stateFile)
 }
 

client/cmd/root.go

@@ -85,6 +85,9 @@ var (
 
 // Execute executes the root command.
 func Execute() error {
+	if isUpdateBinary() {
+		return updateCmd.Execute()
+	}
 	return rootCmd.Execute()
 }
 

client/cmd/signer/artifactkey.go

@@ -0,0 +1,176 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/spf13/cobra"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/reposign"
+)
+
+var (
+	bundlePubKeysRootPrivKeyFile string
+	bundlePubKeysPubKeyFiles     []string
+	bundlePubKeysFile            string
+
+	createArtifactKeyRootPrivKeyFile string
+	createArtifactKeyPrivKeyFile     string
+	createArtifactKeyPubKeyFile      string
+	createArtifactKeyExpiration      time.Duration
+)
+
+var createArtifactKeyCmd = &cobra.Command{
+	Use:   "create-artifact-key",
+	Short: "Create a new artifact signing key",
+	Long: `Generate a new artifact signing key pair signed by the root private key.
+The artifact key will be used to sign software artifacts/updates.`,
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if createArtifactKeyExpiration <= 0 {
+			return fmt.Errorf("--expiration must be a positive duration (e.g., 720h, 365d, 8760h)")
+		}
+
+		if err := handleCreateArtifactKey(cmd, createArtifactKeyRootPrivKeyFile, createArtifactKeyPrivKeyFile, createArtifactKeyPubKeyFile, createArtifactKeyExpiration); err != nil {
+			return fmt.Errorf("failed to create artifact key: %w", err)
+		}
+		return nil
+	},
+}
+
+var bundlePubKeysCmd = &cobra.Command{
+	Use:   "bundle-pub-keys",
+	Short: "Bundle multiple artifact public keys into a signed package",
+	Long: `Bundle one or more artifact public keys into a signed package using the root private key.
+This command is typically used to distribute or authorize a set of valid artifact signing keys.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if len(bundlePubKeysPubKeyFiles) == 0 {
+			return fmt.Errorf("at least one --artifact-pub-key-file must be provided")
+		}
+
+		if err := handleBundlePubKeys(cmd, bundlePubKeysRootPrivKeyFile, bundlePubKeysPubKeyFiles, bundlePubKeysFile); err != nil {
+			return fmt.Errorf("failed to bundle public keys: %w", err)
+		}
+		return nil
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(createArtifactKeyCmd)
+
+	createArtifactKeyCmd.Flags().StringVar(&createArtifactKeyRootPrivKeyFile, "root-private-key-file", "", "Path to the root private key file used to sign the artifact key")
+	createArtifactKeyCmd.Flags().StringVar(&createArtifactKeyPrivKeyFile, "artifact-priv-key-file", "", "Path where the artifact private key will be saved")
+	createArtifactKeyCmd.Flags().StringVar(&createArtifactKeyPubKeyFile, "artifact-pub-key-file", "", "Path where the artifact public key will be saved")
+	createArtifactKeyCmd.Flags().DurationVar(&createArtifactKeyExpiration, "expiration", 0, "Expiration duration for the artifact key (e.g., 720h, 365d, 8760h)")
+
+	if err := createArtifactKeyCmd.MarkFlagRequired("root-private-key-file"); err != nil {
+		panic(fmt.Errorf("mark root-private-key-file as required: %w", err))
+	}
+	if err := createArtifactKeyCmd.MarkFlagRequired("artifact-priv-key-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-priv-key-file as required: %w", err))
+	}
+	if err := createArtifactKeyCmd.MarkFlagRequired("artifact-pub-key-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-pub-key-file as required: %w", err))
+	}
+	if err := createArtifactKeyCmd.MarkFlagRequired("expiration"); err != nil {
+		panic(fmt.Errorf("mark expiration as required: %w", err))
+	}
+
+	rootCmd.AddCommand(bundlePubKeysCmd)
+
+	bundlePubKeysCmd.Flags().StringVar(&bundlePubKeysRootPrivKeyFile, "root-private-key-file", "", "Path to the root private key file used to sign the bundle")
+	bundlePubKeysCmd.Flags().StringArrayVar(&bundlePubKeysPubKeyFiles, "artifact-pub-key-file", nil, "Path(s) to the artifact public key files to include in the bundle (can be repeated)")
+	bundlePubKeysCmd.Flags().StringVar(&bundlePubKeysFile, "bundle-pub-key-file", "", "Path where the public keys will be saved")
+
+	if err := bundlePubKeysCmd.MarkFlagRequired("root-private-key-file"); err != nil {
+		panic(fmt.Errorf("mark root-private-key-file as required: %w", err))
+	}
+	if err := bundlePubKeysCmd.MarkFlagRequired("artifact-pub-key-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-pub-key-file as required: %w", err))
+	}
+	if err := bundlePubKeysCmd.MarkFlagRequired("bundle-pub-key-file"); err != nil {
+		panic(fmt.Errorf("mark bundle-pub-key-file as required: %w", err))
+	}
+}
+
+func handleCreateArtifactKey(cmd *cobra.Command, rootPrivKeyFile, artifactPrivKeyFile, artifactPubKeyFile string, expiration time.Duration) error {
+	cmd.Println("Creating new artifact signing key...")
+
+	privKeyPEM, err := os.ReadFile(rootPrivKeyFile)
+	if err != nil {
+		return fmt.Errorf("read root private key file: %w", err)
+	}
+
+	privateRootKey, err := reposign.ParseRootKey(privKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse private root key: %w", err)
+	}
+
+	artifactKey, privPEM, pubPEM, signature, err := reposign.GenerateArtifactKey(privateRootKey, expiration)
+	if err != nil {
+		return fmt.Errorf("generate artifact key: %w", err)
+	}
+
+	if err := os.WriteFile(artifactPrivKeyFile, privPEM, 0o600); err != nil {
+		return fmt.Errorf("write private key file (%s): %w", artifactPrivKeyFile, err)
+	}
+
+	if err := os.WriteFile(artifactPubKeyFile, pubPEM, 0o600); err != nil {
+		return fmt.Errorf("write public key file (%s): %w", artifactPubKeyFile, err)
+	}
+
+	signatureFile := artifactPubKeyFile + ".sig"
+	if err := os.WriteFile(signatureFile, signature, 0o600); err != nil {
+		return fmt.Errorf("write signature file (%s): %w", signatureFile, err)
+	}
+
+	cmd.Printf("✅ Artifact key created successfully.\n")
+	cmd.Printf("%s\n", artifactKey.String())
+	return nil
+}
+
+func handleBundlePubKeys(cmd *cobra.Command, rootPrivKeyFile string, artifactPubKeyFiles []string, bundlePubKeysFile string) error {
+	cmd.Println("📦 Bundling public keys into signed package...")
+
+	privKeyPEM, err := os.ReadFile(rootPrivKeyFile)
+	if err != nil {
+		return fmt.Errorf("read root private key file: %w", err)
+	}
+
+	privateRootKey, err := reposign.ParseRootKey(privKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse private root key: %w", err)
+	}
+
+	publicKeys := make([]reposign.PublicKey, 0, len(artifactPubKeyFiles))
+	for _, pubFile := range artifactPubKeyFiles {
+		pubPem, err := os.ReadFile(pubFile)
+		if err != nil {
+			return fmt.Errorf("read public key file: %w", err)
+		}
+
+		pk, err := reposign.ParseArtifactPubKey(pubPem)
+		if err != nil {
+			return fmt.Errorf("failed to parse artifact key: %w", err)
+		}
+		publicKeys = append(publicKeys, pk)
+	}
+
+	parsedKeys, signature, err := reposign.BundleArtifactKeys(privateRootKey, publicKeys)
+	if err != nil {
+		return fmt.Errorf("bundle artifact keys: %w", err)
+	}
+
+	if err := os.WriteFile(bundlePubKeysFile, parsedKeys, 0o600); err != nil {
+		return fmt.Errorf("write public keys file (%s): %w", bundlePubKeysFile, err)
+	}
+
+	signatureFile := bundlePubKeysFile + ".sig"
+	if err := os.WriteFile(signatureFile, signature, 0o600); err != nil {
+		return fmt.Errorf("write signature file (%s): %w", signatureFile, err)
+	}
+
+	cmd.Printf("✅ Bundle created with %d public keys.\n", len(artifactPubKeyFiles))
+	return nil
+}

client/cmd/signer/artifactsign.go

@@ -0,0 +1,276 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/reposign"
+)
+
+const (
+	envArtifactPrivateKey = "NB_ARTIFACT_PRIV_KEY"
+)
+
+var (
+	signArtifactPrivKeyFile  string
+	signArtifactArtifactFile string
+
+	verifyArtifactPubKeyFile    string
+	verifyArtifactFile          string
+	verifyArtifactSignatureFile string
+
+	verifyArtifactKeyPubKeyFile     string
+	verifyArtifactKeyRootPubKeyFile string
+	verifyArtifactKeySignatureFile  string
+	verifyArtifactKeyRevocationFile string
+)
+
+var signArtifactCmd = &cobra.Command{
+	Use:   "sign-artifact",
+	Short: "Sign an artifact using an artifact private key",
+	Long: `Sign a software artifact (e.g., update bundle or binary) using the artifact's private key.
+This command produces a detached signature that can be verified using the corresponding artifact public key.`,
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if err := handleSignArtifact(cmd, signArtifactPrivKeyFile, signArtifactArtifactFile); err != nil {
+			return fmt.Errorf("failed to sign artifact: %w", err)
+		}
+		return nil
+	},
+}
+
+var verifyArtifactCmd = &cobra.Command{
+	Use:          "verify-artifact",
+	Short:        "Verify an artifact signature using an artifact public key",
+	Long:         `Verify a software artifact signature using the artifact's public key.`,
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if err := handleVerifyArtifact(cmd, verifyArtifactPubKeyFile, verifyArtifactFile, verifyArtifactSignatureFile); err != nil {
+			return fmt.Errorf("failed to verify artifact: %w", err)
+		}
+		return nil
+	},
+}
+
+var verifyArtifactKeyCmd = &cobra.Command{
+	Use:   "verify-artifact-key",
+	Short: "Verify an artifact public key was signed by a root key",
+	Long: `Verify that an artifact public key (or bundle) was properly signed by a root key.
+This validates the chain of trust from the root key to the artifact key.`,
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if err := handleVerifyArtifactKey(cmd, verifyArtifactKeyPubKeyFile, verifyArtifactKeyRootPubKeyFile, verifyArtifactKeySignatureFile, verifyArtifactKeyRevocationFile); err != nil {
+			return fmt.Errorf("failed to verify artifact key: %w", err)
+		}
+		return nil
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(signArtifactCmd)
+	rootCmd.AddCommand(verifyArtifactCmd)
+	rootCmd.AddCommand(verifyArtifactKeyCmd)
+
+	signArtifactCmd.Flags().StringVar(&signArtifactPrivKeyFile, "artifact-key-file", "", fmt.Sprintf("Path to the artifact private key file used for signing (or set %s env var)", envArtifactPrivateKey))
+	signArtifactCmd.Flags().StringVar(&signArtifactArtifactFile, "artifact-file", "", "Path to the artifact to be signed")
+
+	// artifact-file is required, but artifact-key-file can come from env var
+	if err := signArtifactCmd.MarkFlagRequired("artifact-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-file as required: %w", err))
+	}
+
+	verifyArtifactCmd.Flags().StringVar(&verifyArtifactPubKeyFile, "artifact-public-key-file", "", "Path to the artifact public key file")
+	verifyArtifactCmd.Flags().StringVar(&verifyArtifactFile, "artifact-file", "", "Path to the artifact to be verified")
+	verifyArtifactCmd.Flags().StringVar(&verifyArtifactSignatureFile, "signature-file", "", "Path to the signature file")
+
+	if err := verifyArtifactCmd.MarkFlagRequired("artifact-public-key-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-public-key-file as required: %w", err))
+	}
+	if err := verifyArtifactCmd.MarkFlagRequired("artifact-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-file as required: %w", err))
+	}
+	if err := verifyArtifactCmd.MarkFlagRequired("signature-file"); err != nil {
+		panic(fmt.Errorf("mark signature-file as required: %w", err))
+	}
+
+	verifyArtifactKeyCmd.Flags().StringVar(&verifyArtifactKeyPubKeyFile, "artifact-key-file", "", "Path to the artifact public key file or bundle")
+	verifyArtifactKeyCmd.Flags().StringVar(&verifyArtifactKeyRootPubKeyFile, "root-key-file", "", "Path to the root public key file or bundle")
+	verifyArtifactKeyCmd.Flags().StringVar(&verifyArtifactKeySignatureFile, "signature-file", "", "Path to the signature file")
+	verifyArtifactKeyCmd.Flags().StringVar(&verifyArtifactKeyRevocationFile, "revocation-file", "", "Path to the revocation list file (optional)")
+
+	if err := verifyArtifactKeyCmd.MarkFlagRequired("artifact-key-file"); err != nil {
+		panic(fmt.Errorf("mark artifact-key-file as required: %w", err))
+	}
+	if err := verifyArtifactKeyCmd.MarkFlagRequired("root-key-file"); err != nil {
+		panic(fmt.Errorf("mark root-key-file as required: %w", err))
+	}
+	if err := verifyArtifactKeyCmd.MarkFlagRequired("signature-file"); err != nil {
+		panic(fmt.Errorf("mark signature-file as required: %w", err))
+	}
+}
+
+func handleSignArtifact(cmd *cobra.Command, privKeyFile, artifactFile string) error {
+	cmd.Println("🖋️  Signing artifact...")
+
+	// Load private key from env var or file
+	var privKeyPEM []byte
+	var err error
+
+	if envKey := os.Getenv(envArtifactPrivateKey); envKey != "" {
+		// Use key from environment variable
+		privKeyPEM = []byte(envKey)
+	} else if privKeyFile != "" {
+		// Fall back to file
+		privKeyPEM, err = os.ReadFile(privKeyFile)
+		if err != nil {
+			return fmt.Errorf("read private key file: %w", err)
+		}
+	} else {
+		return fmt.Errorf("artifact private key must be provided via %s environment variable or --artifact-key-file flag", envArtifactPrivateKey)
+	}
+
+	privateKey, err := reposign.ParseArtifactKey(privKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse artifact private key: %w", err)
+	}
+
+	artifactData, err := os.ReadFile(artifactFile)
+	if err != nil {
+		return fmt.Errorf("read artifact file: %w", err)
+	}
+
+	signature, err := reposign.SignData(privateKey, artifactData)
+	if err != nil {
+		return fmt.Errorf("sign artifact: %w", err)
+	}
+
+	sigFile := artifactFile + ".sig"
+	if err := os.WriteFile(artifactFile+".sig", signature, 0o600); err != nil {
+		return fmt.Errorf("write signature file (%s): %w", sigFile, err)
+	}
+
+	cmd.Printf("✅ Artifact signed successfully.\n")
+	cmd.Printf("Signature file: %s\n", sigFile)
+	return nil
+}
+
+func handleVerifyArtifact(cmd *cobra.Command, pubKeyFile, artifactFile, signatureFile string) error {
+	cmd.Println("🔍 Verifying artifact...")
+
+	// Read artifact public key
+	pubKeyPEM, err := os.ReadFile(pubKeyFile)
+	if err != nil {
+		return fmt.Errorf("read public key file: %w", err)
+	}
+
+	publicKey, err := reposign.ParseArtifactPubKey(pubKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse artifact public key: %w", err)
+	}
+
+	// Read artifact data
+	artifactData, err := os.ReadFile(artifactFile)
+	if err != nil {
+		return fmt.Errorf("read artifact file: %w", err)
+	}
+
+	// Read signature
+	sigBytes, err := os.ReadFile(signatureFile)
+	if err != nil {
+		return fmt.Errorf("read signature file: %w", err)
+	}
+
+	signature, err := reposign.ParseSignature(sigBytes)
+	if err != nil {
+		return fmt.Errorf("failed to parse signature: %w", err)
+	}
+
+	// Validate artifact
+	if err := reposign.ValidateArtifact([]reposign.PublicKey{publicKey}, artifactData, *signature); err != nil {
+		return fmt.Errorf("artifact verification failed: %w", err)
+	}
+
+	cmd.Println("✅ Artifact signature is valid")
+	cmd.Printf("Artifact: %s\n", artifactFile)
+	cmd.Printf("Signed by key: %s\n", signature.KeyID)
+	cmd.Printf("Signature timestamp: %s\n", signature.Timestamp.Format("2006-01-02 15:04:05 MST"))
+	return nil
+}
+
+func handleVerifyArtifactKey(cmd *cobra.Command, artifactKeyFile, rootKeyFile, signatureFile, revocationFile string) error {
+	cmd.Println("🔍 Verifying artifact key...")
+
+	// Read artifact key data
+	artifactKeyData, err := os.ReadFile(artifactKeyFile)
+	if err != nil {
+		return fmt.Errorf("read artifact key file: %w", err)
+	}
+
+	// Read root public key(s)
+	rootKeyData, err := os.ReadFile(rootKeyFile)
+	if err != nil {
+		return fmt.Errorf("read root key file: %w", err)
+	}
+
+	rootPublicKeys, err := parseRootPublicKeys(rootKeyData)
+	if err != nil {
+		return fmt.Errorf("failed to parse root public key(s): %w", err)
+	}
+
+	// Read signature
+	sigBytes, err := os.ReadFile(signatureFile)
+	if err != nil {
+		return fmt.Errorf("read signature file: %w", err)
+	}
+
+	signature, err := reposign.ParseSignature(sigBytes)
+	if err != nil {
+		return fmt.Errorf("failed to parse signature: %w", err)
+	}
+
+	// Read optional revocation list
+	var revocationList *reposign.RevocationList
+	if revocationFile != "" {
+		revData, err := os.ReadFile(revocationFile)
+		if err != nil {
+			return fmt.Errorf("read revocation file: %w", err)
+		}
+
+		revocationList, err = reposign.ParseRevocationList(revData)
+		if err != nil {
+			return fmt.Errorf("failed to parse revocation list: %w", err)
+		}
+	}
+
+	// Validate artifact key(s)
+	validKeys, err := reposign.ValidateArtifactKeys(rootPublicKeys, artifactKeyData, *signature, revocationList)
+	if err != nil {
+		return fmt.Errorf("artifact key verification failed: %w", err)
+	}
+
+	cmd.Println("✅ Artifact key(s) verified successfully")
+	cmd.Printf("Signed by root key: %s\n", signature.KeyID)
+	cmd.Printf("Signature timestamp: %s\n", signature.Timestamp.Format("2006-01-02 15:04:05 MST"))
+	cmd.Printf("\nValid artifact keys (%d):\n", len(validKeys))
+	for i, key := range validKeys {
+		cmd.Printf("  [%d] Key ID: %s\n", i+1, key.Metadata.ID)
+		cmd.Printf("      Created: %s\n", key.Metadata.CreatedAt.Format("2006-01-02 15:04:05 MST"))
+		if !key.Metadata.ExpiresAt.IsZero() {
+			cmd.Printf("      Expires: %s\n", key.Metadata.ExpiresAt.Format("2006-01-02 15:04:05 MST"))
+		} else {
+			cmd.Printf("      Expires: Never\n")
+		}
+	}
+	return nil
+}
+
+// parseRootPublicKeys parses a root public key from PEM data
+func parseRootPublicKeys(data []byte) ([]reposign.PublicKey, error) {
+	key, err := reposign.ParseRootPublicKey(data)
+	if err != nil {
+		return nil, err
+	}
+	return []reposign.PublicKey{key}, nil
+}

client/cmd/signer/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "signer",
+	Short: "A CLI tool for managing cryptographic keys and artifacts",
+	Long: `signer is a command-line tool that helps you manage
+root keys, artifact keys, and revocation lists securely.`,
+}
+
+func main() {
+	if err := rootCmd.Execute(); err != nil {
+		rootCmd.Println(err)
+		os.Exit(1)
+	}
+}

client/cmd/signer/revocation.go

@@ -0,0 +1,220 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/spf13/cobra"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/reposign"
+)
+
+const (
+	defaultRevocationListExpiration = 365 * 24 * time.Hour // 1 year
+)
+
+var (
+	keyID              string
+	revocationListFile string
+	privateRootKeyFile string
+	publicRootKeyFile  string
+	signatureFile      string
+	expirationDuration time.Duration
+)
+
+var createRevocationListCmd = &cobra.Command{
+	Use:          "create-revocation-list",
+	Short:        "Create a new revocation list signed by the private root key",
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return handleCreateRevocationList(cmd, revocationListFile, privateRootKeyFile)
+	},
+}
+
+var extendRevocationListCmd = &cobra.Command{
+	Use:          "extend-revocation-list",
+	Short:        "Extend an existing revocation list with a given key ID",
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return handleExtendRevocationList(cmd, keyID, revocationListFile, privateRootKeyFile)
+	},
+}
+
+var verifyRevocationListCmd = &cobra.Command{
+	Use:          "verify-revocation-list",
+	Short:        "Verify a revocation list signature using the public root key",
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return handleVerifyRevocationList(cmd, revocationListFile, signatureFile, publicRootKeyFile)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(createRevocationListCmd)
+	rootCmd.AddCommand(extendRevocationListCmd)
+	rootCmd.AddCommand(verifyRevocationListCmd)
+
+	createRevocationListCmd.Flags().StringVar(&revocationListFile, "revocation-list-file", "", "Path to the existing revocation list file")
+	createRevocationListCmd.Flags().StringVar(&privateRootKeyFile, "private-root-key", "", "Path to the private root key PEM file")
+	createRevocationListCmd.Flags().DurationVar(&expirationDuration, "expiration", defaultRevocationListExpiration, "Expiration duration for the revocation list (e.g., 8760h for 1 year)")
+	if err := createRevocationListCmd.MarkFlagRequired("revocation-list-file"); err != nil {
+		panic(err)
+	}
+	if err := createRevocationListCmd.MarkFlagRequired("private-root-key"); err != nil {
+		panic(err)
+	}
+
+	extendRevocationListCmd.Flags().StringVar(&keyID, "key-id", "", "ID of the key to extend the revocation list for")
+	extendRevocationListCmd.Flags().StringVar(&revocationListFile, "revocation-list-file", "", "Path to the existing revocation list file")
+	extendRevocationListCmd.Flags().StringVar(&privateRootKeyFile, "private-root-key", "", "Path to the private root key PEM file")
+	extendRevocationListCmd.Flags().DurationVar(&expirationDuration, "expiration", defaultRevocationListExpiration, "Expiration duration for the revocation list (e.g., 8760h for 1 year)")
+	if err := extendRevocationListCmd.MarkFlagRequired("key-id"); err != nil {
+		panic(err)
+	}
+	if err := extendRevocationListCmd.MarkFlagRequired("revocation-list-file"); err != nil {
+		panic(err)
+	}
+	if err := extendRevocationListCmd.MarkFlagRequired("private-root-key"); err != nil {
+		panic(err)
+	}
+
+	verifyRevocationListCmd.Flags().StringVar(&revocationListFile, "revocation-list-file", "", "Path to the revocation list file")
+	verifyRevocationListCmd.Flags().StringVar(&signatureFile, "signature-file", "", "Path to the signature file")
+	verifyRevocationListCmd.Flags().StringVar(&publicRootKeyFile, "public-root-key", "", "Path to the public root key PEM file")
+	if err := verifyRevocationListCmd.MarkFlagRequired("revocation-list-file"); err != nil {
+		panic(err)
+	}
+	if err := verifyRevocationListCmd.MarkFlagRequired("signature-file"); err != nil {
+		panic(err)
+	}
+	if err := verifyRevocationListCmd.MarkFlagRequired("public-root-key"); err != nil {
+		panic(err)
+	}
+}
+
+func handleCreateRevocationList(cmd *cobra.Command, revocationListFile string, privateRootKeyFile string) error {
+	privKeyPEM, err := os.ReadFile(privateRootKeyFile)
+	if err != nil {
+		return fmt.Errorf("failed to read private root key file: %w", err)
+	}
+
+	privateRootKey, err := reposign.ParseRootKey(privKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse private root key: %w", err)
+	}
+
+	rlBytes, sigBytes, err := reposign.CreateRevocationList(*privateRootKey, expirationDuration)
+	if err != nil {
+		return fmt.Errorf("failed to create revocation list: %w", err)
+	}
+
+	if err := writeOutputFiles(revocationListFile, revocationListFile+".sig", rlBytes, sigBytes); err != nil {
+		return fmt.Errorf("failed to write output files: %w", err)
+	}
+
+	cmd.Println("✅ Revocation list created successfully")
+	return nil
+}
+
+func handleExtendRevocationList(cmd *cobra.Command, keyID, revocationListFile, privateRootKeyFile string) error {
+	privKeyPEM, err := os.ReadFile(privateRootKeyFile)
+	if err != nil {
+		return fmt.Errorf("failed to read private root key file: %w", err)
+	}
+
+	privateRootKey, err := reposign.ParseRootKey(privKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse private root key: %w", err)
+	}
+
+	rlBytes, err := os.ReadFile(revocationListFile)
+	if err != nil {
+		return fmt.Errorf("failed to read revocation list file: %w", err)
+	}
+
+	rl, err := reposign.ParseRevocationList(rlBytes)
+	if err != nil {
+		return fmt.Errorf("failed to parse revocation list: %w", err)
+	}
+
+	kid, err := reposign.ParseKeyID(keyID)
+	if err != nil {
+		return fmt.Errorf("invalid key ID: %w", err)
+	}
+
+	newRLBytes, sigBytes, err := reposign.ExtendRevocationList(*privateRootKey, *rl, kid, expirationDuration)
+	if err != nil {
+		return fmt.Errorf("failed to extend revocation list: %w", err)
+	}
+
+	if err := writeOutputFiles(revocationListFile, revocationListFile+".sig", newRLBytes, sigBytes); err != nil {
+		return fmt.Errorf("failed to write output files: %w", err)
+	}
+
+	cmd.Println("✅ Revocation list extended successfully")
+	return nil
+}
+
+func handleVerifyRevocationList(cmd *cobra.Command, revocationListFile, signatureFile, publicRootKeyFile string) error {
+	// Read revocation list file
+	rlBytes, err := os.ReadFile(revocationListFile)
+	if err != nil {
+		return fmt.Errorf("failed to read revocation list file: %w", err)
+	}
+
+	// Read signature file
+	sigBytes, err := os.ReadFile(signatureFile)
+	if err != nil {
+		return fmt.Errorf("failed to read signature file: %w", err)
+	}
+
+	// Read public root key file
+	pubKeyPEM, err := os.ReadFile(publicRootKeyFile)
+	if err != nil {
+		return fmt.Errorf("failed to read public root key file: %w", err)
+	}
+
+	// Parse public root key
+	publicKey, err := reposign.ParseRootPublicKey(pubKeyPEM)
+	if err != nil {
+		return fmt.Errorf("failed to parse public root key: %w", err)
+	}
+
+	// Parse signature
+	signature, err := reposign.ParseSignature(sigBytes)
+	if err != nil {
+		return fmt.Errorf("failed to parse signature: %w", err)
+	}
+
+	// Validate revocation list
+	rl, err := reposign.ValidateRevocationList([]reposign.PublicKey{publicKey}, rlBytes, *signature)
+	if err != nil {
+		return fmt.Errorf("failed to validate revocation list: %w", err)
+	}
+
+	// Display results
+	cmd.Println("✅ Revocation list signature is valid")
+	cmd.Printf("Last Updated: %s\n", rl.LastUpdated.Format(time.RFC3339))
+	cmd.Printf("Expires At: %s\n", rl.ExpiresAt.Format(time.RFC3339))
+	cmd.Printf("Number of revoked keys: %d\n", len(rl.Revoked))
+
+	if len(rl.Revoked) > 0 {
+		cmd.Println("\nRevoked Keys:")
+		for keyID, revokedTime := range rl.Revoked {
+			cmd.Printf("  - %s (revoked at: %s)\n", keyID, revokedTime.Format(time.RFC3339))
+		}
+	}
+
+	return nil
+}
+
+func writeOutputFiles(rlPath, sigPath string, rlBytes, sigBytes []byte) error {
+	if err := os.WriteFile(rlPath, rlBytes, 0o600); err != nil {
+		return fmt.Errorf("failed to write revocation list file: %w", err)
+	}
+	if err := os.WriteFile(sigPath, sigBytes, 0o600); err != nil {
+		return fmt.Errorf("failed to write signature file: %w", err)
+	}
+	return nil
+}

client/cmd/signer/rootkey.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/spf13/cobra"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/reposign"
+)
+
+var (
+	privKeyFile    string
+	pubKeyFile     string
+	rootExpiration time.Duration
+)
+
+var createRootKeyCmd = &cobra.Command{
+	Use:          "create-root-key",
+	Short:        "Create a new root key pair",
+	Long:         `Create a new root key pair and specify an expiration time for it.`,
+	SilenceUsage: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		// Validate expiration
+		if rootExpiration <= 0 {
+			return fmt.Errorf("--expiration must be a positive duration (e.g., 720h, 365d, 8760h)")
+		}
+
+		// Run main logic
+		if err := handleGenerateRootKey(cmd, privKeyFile, pubKeyFile, rootExpiration); err != nil {
+			return fmt.Errorf("failed to generate root key: %w", err)
+		}
+		return nil
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(createRootKeyCmd)
+	createRootKeyCmd.Flags().StringVar(&privKeyFile, "priv-key-file", "", "Path to output private key file")
+	createRootKeyCmd.Flags().StringVar(&pubKeyFile, "pub-key-file", "", "Path to output public key file")
+	createRootKeyCmd.Flags().DurationVar(&rootExpiration, "expiration", 0, "Expiration time for the root key (e.g., 720h,)")
+
+	if err := createRootKeyCmd.MarkFlagRequired("priv-key-file"); err != nil {
+		panic(err)
+	}
+	if err := createRootKeyCmd.MarkFlagRequired("pub-key-file"); err != nil {
+		panic(err)
+	}
+	if err := createRootKeyCmd.MarkFlagRequired("expiration"); err != nil {
+		panic(err)
+	}
+}
+
+func handleGenerateRootKey(cmd *cobra.Command, privKeyFile, pubKeyFile string, expiration time.Duration) error {
+	rk, privPEM, pubPEM, err := reposign.GenerateRootKey(expiration)
+	if err != nil {
+		return fmt.Errorf("generate root key: %w", err)
+	}
+
+	// Write private key
+	if err := os.WriteFile(privKeyFile, privPEM, 0o600); err != nil {
+		return fmt.Errorf("write private key file (%s): %w", privKeyFile, err)
+	}
+
+	// Write public key
+	if err := os.WriteFile(pubKeyFile, pubPEM, 0o600); err != nil {
+		return fmt.Errorf("write public key file (%s): %w", pubKeyFile, err)
+	}
+
+	cmd.Printf("%s\n\n", rk.String())
+	cmd.Printf("✅ Root key pair generated successfully.\n")
+	return nil
+}

client/cmd/up.go

@@ -197,7 +197,7 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command, activeProf *pr
 	r := peer.NewRecorder(config.ManagementURL.String())
 	r.GetFullStatus()
 
-	connectClient := internal.NewConnectClient(ctx, config, r)
+	connectClient := internal.NewConnectClient(ctx, config, r, false)
 	SetupDebugHandler(ctx, config, r, connectClient, "")
 
 	return connectClient.Run(nil)

client/cmd/update.go

@@ -0,0 +1,13 @@
+//go:build !windows && !darwin
+
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var updateCmd *cobra.Command
+
+func isUpdateBinary() bool {
+	return false
+}

client/cmd/update_supported.go

@@ -0,0 +1,75 @@
+//go:build windows || darwin
+
+package cmd
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/installer"
+	"github.com/netbirdio/netbird/util"
+)
+
+var (
+	updateCmd = &cobra.Command{
+		Use:   "update",
+		Short: "Update the NetBird client application",
+		RunE:  updateFunc,
+	}
+
+	tempDirFlag    string
+	installerFile  string
+	serviceDirFlag string
+	dryRunFlag     bool
+)
+
+func init() {
+	updateCmd.Flags().StringVar(&tempDirFlag, "temp-dir", "", "temporary dir")
+	updateCmd.Flags().StringVar(&installerFile, "installer-file", "", "installer file")
+	updateCmd.Flags().StringVar(&serviceDirFlag, "service-dir", "", "service directory")
+	updateCmd.Flags().BoolVar(&dryRunFlag, "dry-run", false, "dry run the update process without making any changes")
+}
+
+// isUpdateBinary checks if the current executable is named "update" or "update.exe"
+func isUpdateBinary() bool {
+	// Remove extension for cross-platform compatibility
+	execPath, err := os.Executable()
+	if err != nil {
+		return false
+	}
+	baseName := filepath.Base(execPath)
+	name := strings.TrimSuffix(baseName, filepath.Ext(baseName))
+
+	return name == installer.UpdaterBinaryNameWithoutExtension()
+}
+
+func updateFunc(cmd *cobra.Command, args []string) error {
+	if err := setupLogToFile(tempDirFlag); err != nil {
+		return err
+	}
+
+	log.Infof("updater started: %s", serviceDirFlag)
+	updater := installer.NewWithDir(tempDirFlag)
+	if err := updater.Setup(context.Background(), dryRunFlag, installerFile, serviceDirFlag); err != nil {
+		log.Errorf("failed to update application: %v", err)
+		return err
+	}
+	return nil
+}
+
+func setupLogToFile(dir string) error {
+	logFile := filepath.Join(dir, installer.LogFile)
+
+	if _, err := os.Stat(logFile); err == nil {
+		if err := os.Remove(logFile); err != nil {
+			log.Errorf("failed to remove existing log file: %v\n", err)
+		}
+	}
+
+	return util.InitLog(logLevel, util.LogConsole, logFile)
+}

client/embed/embed.go

@@ -173,7 +173,7 @@ func (c *Client) Start(startCtx context.Context) error {
 	}
 
 	recorder := peer.NewRecorder(c.config.ManagementURL.String())
-	client := internal.NewConnectClient(ctx, c.config, recorder)
+	client := internal.NewConnectClient(ctx, c.config, recorder, false)
 
 	// either startup error (permanent backoff err) or nil err (successful engine up)
 	// TODO: make after-startup backoff err available

client/internal/connect.go

@@ -24,10 +24,14 @@ import (
 	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/internal/profilemanager"
+	"github.com/netbirdio/netbird/client/internal/statemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
+	"github.com/netbirdio/netbird/client/internal/updatemanager"
+	"github.com/netbirdio/netbird/client/internal/updatemanager/installer"
 	nbnet "github.com/netbirdio/netbird/client/net"
 	cProto "github.com/netbirdio/netbird/client/proto"
 	"github.com/netbirdio/netbird/client/ssh"
+	sshconfig "github.com/netbirdio/netbird/client/ssh/config"
 	"github.com/netbirdio/netbird/client/system"
 	mgm "github.com/netbirdio/netbird/shared/management/client"
 	mgmProto "github.com/netbirdio/netbird/shared/management/proto"
@@ -39,11 +43,13 @@ import (
 )
 
 type ConnectClient struct {
-	ctx            context.Context
-	config         *profilemanager.Config
-	statusRecorder *peer.Status
-	engine         *Engine
-	engineMutex    sync.Mutex
+	ctx                 context.Context
+	config              *profilemanager.Config
+	statusRecorder      *peer.Status
+	doInitialAutoUpdate bool
+
+	engine      *Engine
+	engineMutex sync.Mutex
 
 	persistSyncResponse bool
 }
@@ -52,13 +58,15 @@ func NewConnectClient(
 	ctx context.Context,
 	config *profilemanager.Config,
 	statusRecorder *peer.Status,
+	doInitalAutoUpdate bool,
 
 ) *ConnectClient {
 	return &ConnectClient{
-		ctx:            ctx,
-		config:         config,
-		statusRecorder: statusRecorder,
-		engineMutex:    sync.Mutex{},
+		ctx:                 ctx,
+		config:              config,
+		statusRecorder:      statusRecorder,
+		doInitialAutoUpdate: doInitalAutoUpdate,
+		engineMutex:         sync.Mutex{},
 	}
 }
 
@@ -162,6 +170,33 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 		return err
 	}
 
+	sm := profilemanager.NewServiceManager("")
+
+	path := sm.GetStatePath()
+	if runtime.GOOS == "ios" || runtime.GOOS == "android" {
+		if !fileExists(mobileDependency.StateFilePath) {
+			err := createFile(mobileDependency.StateFilePath)
+			if err != nil {
+				log.Errorf("failed to create state file: %v", err)
+				// we are not exiting as we can run without the state manager
+			}
+		}
+
+		path = mobileDependency.StateFilePath
+	}
+	stateManager := statemanager.New(path)
+	stateManager.RegisterState(&sshconfig.ShutdownState{})
+
+	updateManager, err := updatemanager.NewManager(c.statusRecorder, stateManager)
+	if err == nil {
+		updateManager.CheckUpdateSuccess(c.ctx)
+
+		inst := installer.New()
+		if err := inst.CleanUpInstallerFiles(); err != nil {
+			log.Errorf("failed to clean up temporary installer file: %v", err)
+		}
+	}
+
 	defer c.statusRecorder.ClientStop()
 	operation := func() error {
 		// if context cancelled we not start new backoff cycle
@@ -273,7 +308,7 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 		checks := loginResp.GetChecks()
 
 		c.engineMutex.Lock()
-		engine := NewEngine(engineCtx, cancel, signalClient, mgmClient, relayManager, engineConfig, mobileDependency, c.statusRecorder, checks)
+		engine := NewEngine(engineCtx, cancel, signalClient, mgmClient, relayManager, engineConfig, mobileDependency, c.statusRecorder, checks, stateManager)
 		engine.SetSyncResponsePersistence(c.persistSyncResponse)
 		c.engine = engine
 		c.engineMutex.Unlock()
@@ -283,6 +318,15 @@ func (c *ConnectClient) run(mobileDependency MobileDependency, runningChan chan
 			return wrapErr(err)
 		}
 
+		if loginResp.PeerConfig != nil && loginResp.PeerConfig.AutoUpdate != nil {
+			// AutoUpdate will be true when the user click on "Connect" menu on the UI
+			if c.doInitialAutoUpdate {
+				log.Infof("start engine by ui, run auto-update check")
+				c.engine.InitialUpdateHandling(loginResp.PeerConfig.AutoUpdate)
+				c.doInitialAutoUpdate = false
+			}
+		}
+
 		log.Infof("Netbird engine started, the IP is: %s", peerConfig.GetAddress())
 		state.Set(StatusConnected)
 

client/internal/debug/debug.go

@@ -27,6 +27,7 @@ import (
 	"github.com/netbirdio/netbird/client/anonymize"
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/internal/profilemanager"
+	"github.com/netbirdio/netbird/client/internal/updatemanager/installer"
 	mgmProto "github.com/netbirdio/netbird/shared/management/proto"
 	"github.com/netbirdio/netbird/util"
 )
@@ -362,6 +363,10 @@ func (g *BundleGenerator) createArchive() error {
 		log.Errorf("failed to add systemd logs: %v", err)
 	}
 
+	if err := g.addUpdateLogs(); err != nil {
+		log.Errorf("failed to add updater logs: %v", err)
+	}
+
 	return nil
 }
 
@@ -650,6 +655,29 @@ func (g *BundleGenerator) addStateFile() error {
 	return nil
 }
 
+func (g *BundleGenerator) addUpdateLogs() error {
+	inst := installer.New()
+	logFiles := inst.LogFiles()
+	if len(logFiles) == 0 {
+		return nil
+	}
+
+	log.Infof("adding updater logs")
+	for _, logFile := range logFiles {
+		data, err := os.ReadFile(logFile)
+		if err != nil {
+			log.Warnf("failed to read update log file %s: %v", logFile, err)
+			continue
+		}
+
+		baseName := filepath.Base(logFile)
+		if err := g.addFileToZip(bytes.NewReader(data), filepath.Join("update-logs", baseName)); err != nil {
+			return fmt.Errorf("add update log file %s to zip: %w", baseName, err)
+		}
+	}
+	return nil
+}
+
 func (g *BundleGenerator) addCorruptedStateFiles() error {
 	sm := profilemanager.NewServiceManager("")
 	pattern := sm.GetStatePath()

client/internal/engine.go

@@ -42,14 +42,13 @@ import (
 	"github.com/netbirdio/netbird/client/internal/peer/guard"
 	icemaker "github.com/netbirdio/netbird/client/internal/peer/ice"
 	"github.com/netbirdio/netbird/client/internal/peerstore"
-	"github.com/netbirdio/netbird/client/internal/profilemanager"
 	"github.com/netbirdio/netbird/client/internal/relay"
 	"github.com/netbirdio/netbird/client/internal/rosenpass"
 	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
 	"github.com/netbirdio/netbird/client/internal/statemanager"
+	"github.com/netbirdio/netbird/client/internal/updatemanager"
 	cProto "github.com/netbirdio/netbird/client/proto"
-	sshconfig "github.com/netbirdio/netbird/client/ssh/config"
 	"github.com/netbirdio/netbird/shared/management/domain"
 	semaphoregroup "github.com/netbirdio/netbird/util/semaphore-group"
 
@@ -73,6 +72,7 @@ const (
 	PeerConnectionTimeoutMax = 45000 // ms
 	PeerConnectionTimeoutMin = 30000 // ms
 	connInitLimit            = 200
+	disableAutoUpdate        = "disabled"
 )
 
 var ErrResetConnection = fmt.Errorf("reset connection")
@@ -201,6 +201,9 @@ type Engine struct {
 	connSemaphore       *semaphoregroup.SemaphoreGroup
 	flowManager         nftypes.FlowManager
 
+	// auto-update
+	updateManager *updatemanager.Manager
+
 	// WireGuard interface monitor
 	wgIfaceMonitor *WGIfaceMonitor
 
@@ -221,17 +224,7 @@ type localIpUpdater interface {
 }
 
 // NewEngine creates a new Connection Engine with probes attached
-func NewEngine(
-	clientCtx context.Context,
-	clientCancel context.CancelFunc,
-	signalClient signal.Client,
-	mgmClient mgm.Client,
-	relayManager *relayClient.Manager,
-	config *EngineConfig,
-	mobileDep MobileDependency,
-	statusRecorder *peer.Status,
-	checks []*mgmProto.Checks,
-) *Engine {
+func NewEngine(clientCtx context.Context, clientCancel context.CancelFunc, signalClient signal.Client, mgmClient mgm.Client, relayManager *relayClient.Manager, config *EngineConfig, mobileDep MobileDependency, statusRecorder *peer.Status, checks []*mgmProto.Checks, stateManager *statemanager.Manager) *Engine {
 	engine := &Engine{
 		clientCtx:      clientCtx,
 		clientCancel:   clientCancel,
@@ -247,28 +240,12 @@ func NewEngine(
 		TURNs:          []*stun.URI{},
 		networkSerial:  0,
 		statusRecorder: statusRecorder,
+		stateManager:   stateManager,
 		checks:         checks,
 		connSemaphore:  semaphoregroup.NewSemaphoreGroup(connInitLimit),
 		probeStunTurn:  relay.NewStunTurnProbe(relay.DefaultCacheTTL),
 	}
 
-	sm := profilemanager.NewServiceManager("")
-
-	path := sm.GetStatePath()
-	if runtime.GOOS == "ios" || runtime.GOOS == "android" {
-		if !fileExists(mobileDep.StateFilePath) {
-			err := createFile(mobileDep.StateFilePath)
-			if err != nil {
-				log.Errorf("failed to create state file: %v", err)
-				// we are not exiting as we can run without the state manager
-			}
-		}
-
-		path = mobileDep.StateFilePath
-	}
-	engine.stateManager = statemanager.New(path)
-	engine.stateManager.RegisterState(&sshconfig.ShutdownState{})
-
 	log.Infof("I am: %s", config.WgPrivateKey.PublicKey().String())
 	return engine
 }
@@ -308,6 +285,10 @@ func (e *Engine) Stop() error {
 		e.srWatcher.Close()
 	}
 
+	if e.updateManager != nil {
+		e.updateManager.Stop()
+	}
+
 	log.Info("cleaning up status recorder states")
 	e.statusRecorder.ReplaceOfflinePeers([]peer.State{})
 	e.statusRecorder.UpdateDNSStates([]peer.NSGroupState{})
@@ -541,6 +522,13 @@ func (e *Engine) Start(netbirdConfig *mgmProto.NetbirdConfig, mgmtURL *url.URL)
 	return nil
 }
 
+func (e *Engine) InitialUpdateHandling(autoUpdateSettings *mgmProto.AutoUpdateSettings) {
+	e.syncMsgMux.Lock()
+	defer e.syncMsgMux.Unlock()
+
+	e.handleAutoUpdateVersion(autoUpdateSettings, true)
+}
+
 func (e *Engine) createFirewall() error {
 	if e.config.DisableFirewall {
 		log.Infof("firewall is disabled")
@@ -749,6 +737,41 @@ func (e *Engine) PopulateNetbirdConfig(netbirdConfig *mgmProto.NetbirdConfig, mg
 	return nil
 }
 
+func (e *Engine) handleAutoUpdateVersion(autoUpdateSettings *mgmProto.AutoUpdateSettings, initialCheck bool) {
+	if autoUpdateSettings == nil {
+		return
+	}
+
+	disabled := autoUpdateSettings.Version == disableAutoUpdate
+
+	// Stop and cleanup if disabled
+	if e.updateManager != nil && disabled {
+		log.Infof("auto-update is disabled, stopping update manager")
+		e.updateManager.Stop()
+		e.updateManager = nil
+		return
+	}
+
+	// Skip check unless AlwaysUpdate is enabled or this is the initial check at startup
+	if !autoUpdateSettings.AlwaysUpdate && !initialCheck {
+		log.Debugf("skipping auto-update check, AlwaysUpdate is false and this is not the initial check")
+		return
+	}
+
+	// Start manager if needed
+	if e.updateManager == nil {
+		log.Infof("starting auto-update manager")
+		updateManager, err := updatemanager.NewManager(e.statusRecorder, e.stateManager)
+		if err != nil {
+			return
+		}
+		e.updateManager = updateManager
+		e.updateManager.Start(e.ctx)
+	}
+	log.Infof("handling auto-update version: %s", autoUpdateSettings.Version)
+	e.updateManager.SetVersion(autoUpdateSettings.Version)
+}
+
 func (e *Engine) handleSync(update *mgmProto.SyncResponse) error {
 	e.syncMsgMux.Lock()
 	defer e.syncMsgMux.Unlock()
@@ -758,6 +781,10 @@ func (e *Engine) handleSync(update *mgmProto.SyncResponse) error {
 		return e.ctx.Err()
 	}
 
+	if update.NetworkMap != nil && update.NetworkMap.PeerConfig != nil {
+		e.handleAutoUpdateVersion(update.NetworkMap.PeerConfig.AutoUpdate, false)
+	}
+
 	if update.GetNetbirdConfig() != nil {
 		wCfg := update.GetNetbirdConfig()
 		err := e.updateTURNs(wCfg.GetTurns())

client/internal/engine_test.go

@@ -253,6 +253,7 @@ func TestEngine_SSH(t *testing.T) {
 		MobileDependency{},
 		peer.NewRecorder("https://mgm"),
 		nil,
+		nil,
 	)
 
 	engine.dnsServer = &dns.MockServer{
@@ -414,21 +415,13 @@ func TestEngine_UpdateNetworkMap(t *testing.T) {
 	defer cancel()
 
 	relayMgr := relayClient.NewManager(ctx, nil, key.PublicKey().String(), iface.DefaultMTU)
-	engine := NewEngine(
-		ctx, cancel,
-		&signal.MockClient{},
-		&mgmt.MockClient{},
-		relayMgr,
-		&EngineConfig{
-			WgIfaceName:  "utun102",
-			WgAddr:       "100.64.0.1/24",
-			WgPrivateKey: key,
-			WgPort:       33100,
-			MTU:          iface.DefaultMTU,
-		},
-		MobileDependency{},
-		peer.NewRecorder("https://mgm"),
-		nil)
+	engine := NewEngine(ctx, cancel, &signal.MockClient{}, &mgmt.MockClient{}, relayMgr, &EngineConfig{
+		WgIfaceName:  "utun102",
+		WgAddr:       "100.64.0.1/24",
+		WgPrivateKey: key,
+		WgPort:       33100,
+		MTU:          iface.DefaultMTU,
+	}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil, nil)
 
 	wgIface := &MockWGIface{
 		NameFunc: func() string { return "utun102" },
@@ -647,7 +640,7 @@ func TestEngine_Sync(t *testing.T) {
 		WgPrivateKey: key,
 		WgPort:       33100,
 		MTU:          iface.DefaultMTU,
-	}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil)
+	}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil, nil)
 	engine.ctx = ctx
 
 	engine.dnsServer = &dns.MockServer{
@@ -812,7 +805,7 @@ func TestEngine_UpdateNetworkMapWithRoutes(t *testing.T) {
 				WgPrivateKey: key,
 				WgPort:       33100,
 				MTU:          iface.DefaultMTU,
-			}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil)
+			}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil, nil)
 			engine.ctx = ctx
 			newNet, err := stdnet.NewNet(context.Background(), nil)
 			if err != nil {
@@ -1014,7 +1007,7 @@ func TestEngine_UpdateNetworkMapWithDNSUpdate(t *testing.T) {
 				WgPrivateKey: key,
 				WgPort:       33100,
 				MTU:          iface.DefaultMTU,
-			}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil)
+			}, MobileDependency{}, peer.NewRecorder("https://mgm"), nil, nil)
 			engine.ctx = ctx
 
 			newNet, err := stdnet.NewNet(context.Background(), nil)
@@ -1540,7 +1533,7 @@ func createEngine(ctx context.Context, cancel context.CancelFunc, setupKey strin
 	}
 
 	relayMgr := relayClient.NewManager(ctx, nil, key.PublicKey().String(), iface.DefaultMTU)
-	e, err := NewEngine(ctx, cancel, signalClient, mgmtClient, relayMgr, conf, MobileDependency{}, peer.NewRecorder("https://mgm"), nil), nil
+	e, err := NewEngine(ctx, cancel, signalClient, mgmtClient, relayMgr, conf, MobileDependency{}, peer.NewRecorder("https://mgm"), nil, nil), nil
 	e.ctx = ctx
 	return e, err
 }

client/internal/profilemanager/config.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"net/url"
 	"os"
+	"os/user"
 	"path/filepath"
 	"reflect"
 	"runtime"
@@ -165,19 +166,26 @@ func getConfigDir() (string, error) {
 	if ConfigDirOverride != "" {
 		return ConfigDirOverride, nil
 	}
-	configDir, err := os.UserConfigDir()
+
+	base, err := baseConfigDir()
 	if err != nil {
 		return "", err
 	}
 
-	configDir = filepath.Join(configDir, "netbird")
-	if _, err := os.Stat(configDir); os.IsNotExist(err) {
-		if err := os.MkdirAll(configDir, 0755); err != nil {
-			return "", err
+	configDir := filepath.Join(base, "netbird")
+	if err := os.MkdirAll(configDir, 0o755); err != nil {
+		return "", err
+	}
+	return configDir, nil
+}
+
+func baseConfigDir() (string, error) {
+	if runtime.GOOS == "darwin" {
+		if u, err := user.Current(); err == nil && u.HomeDir != "" {
+			return filepath.Join(u.HomeDir, "Library", "Application Support"), nil
 		}
 	}
-
-	return configDir, nil
+	return os.UserConfigDir()
 }
 
 func getConfigDirForUser(username string) (string, error) {

client/internal/updatemanager/doc.go

@@ -0,0 +1,35 @@
+// Package updatemanager provides automatic update management for the NetBird client.
+// It monitors for new versions, handles update triggers from management server directives,
+// and orchestrates the download and installation of client updates.
+//
+// # Overview
+//
+// The update manager operates as a background service that continuously monitors for
+// available updates and automatically initiates the update process when conditions are met.
+// It integrates with the installer package to perform the actual installation.
+//
+// # Update Flow
+//
+// The complete update process follows these steps:
+//
+//  1. Manager receives update directive via SetVersion() or detects new version
+//  2. Manager validates update should proceed (version comparison, rate limiting)
+//  3. Manager publishes "updating" event to status recorder
+//  4. Manager persists UpdateState to track update attempt
+//  5. Manager downloads installer file (.msi or .exe) to temporary directory
+//  6. Manager triggers installation via installer.RunInstallation()
+//  7. Installer package handles the actual installation process
+//  8. On next startup, CheckUpdateSuccess() verifies update completion
+//  9. Manager publishes success/failure event to status recorder
+//  10. Manager cleans up UpdateState
+//
+// # State Management
+//
+// Update state is persisted across restarts to track update attempts:
+//
+//   - PreUpdateVersion: Version before update attempt
+//   - TargetVersion: Version attempting to update to
+//
+// This enables verification of successful updates and appropriate user notification
+// after the client restarts with the new version.
+package updatemanager

client/internal/updatemanager/downloader/downloader.go

@@ -0,0 +1,138 @@
+package downloader
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/version"
+)
+
+const (
+	userAgent         = "NetBird agent installer/%s"
+	DefaultRetryDelay = 3 * time.Second
+)
+
+func DownloadToFile(ctx context.Context, retryDelay time.Duration, url, dstFile string) error {
+	log.Debugf("starting download from %s", url)
+
+	out, err := os.Create(dstFile)
+	if err != nil {
+		return fmt.Errorf("failed to create destination file %q: %w", dstFile, err)
+	}
+	defer func() {
+		if cerr := out.Close(); cerr != nil {
+			log.Warnf("error closing file %q: %v", dstFile, cerr)
+		}
+	}()
+
+	// First attempt
+	err = downloadToFileOnce(ctx, url, out)
+	if err == nil {
+		log.Infof("successfully downloaded file to %s", dstFile)
+		return nil
+	}
+
+	// If retryDelay is 0, don't retry
+	if retryDelay == 0 {
+		return err
+	}
+
+	log.Warnf("download failed, retrying after %v: %v", retryDelay, err)
+
+	// Sleep before retry
+	if sleepErr := sleepWithContext(ctx, retryDelay); sleepErr != nil {
+		return fmt.Errorf("download cancelled during retry delay: %w", sleepErr)
+	}
+
+	// Truncate file before retry
+	if err := out.Truncate(0); err != nil {
+		return fmt.Errorf("failed to truncate file on retry: %w", err)
+	}
+	if _, err := out.Seek(0, 0); err != nil {
+		return fmt.Errorf("failed to seek to beginning of file: %w", err)
+	}
+
+	// Second attempt
+	if err := downloadToFileOnce(ctx, url, out); err != nil {
+		return fmt.Errorf("download failed after retry: %w", err)
+	}
+
+	log.Infof("successfully downloaded file to %s", dstFile)
+	return nil
+}
+
+func DownloadToMemory(ctx context.Context, url string, limit int64) ([]byte, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create HTTP request: %w", err)
+	}
+
+	// Add User-Agent header
+	req.Header.Set("User-Agent", fmt.Sprintf(userAgent, version.NetbirdVersion()))
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to perform HTTP request: %w", err)
+	}
+	defer func() {
+		if cerr := resp.Body.Close(); cerr != nil {
+			log.Warnf("error closing response body: %v", cerr)
+		}
+	}()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected HTTP status: %d", resp.StatusCode)
+	}
+
+	data, err := io.ReadAll(io.LimitReader(resp.Body, limit))
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response body: %w", err)
+	}
+
+	return data, nil
+}
+
+func downloadToFileOnce(ctx context.Context, url string, out *os.File) error {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create HTTP request: %w", err)
+	}
+
+	// Add User-Agent header
+	req.Header.Set("User-Agent", fmt.Sprintf(userAgent, version.NetbirdVersion()))
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to perform HTTP request: %w", err)
+	}
+	defer func() {
+		if cerr := resp.Body.Close(); cerr != nil {
+			log.Warnf("error closing response body: %v", cerr)
+		}
+	}()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("unexpected HTTP status: %d", resp.StatusCode)
+	}
+
+	if _, err := io.Copy(out, resp.Body); err != nil {
+		return fmt.Errorf("failed to write response body to file: %w", err)
+	}
+
+	return nil
+}
+
+func sleepWithContext(ctx context.Context, duration time.Duration) error {
+	select {
+	case <-time.After(duration):
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}

client/internal/updatemanager/downloader/downloader_test.go

@@ -0,0 +1,199 @@
+package downloader
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+const (
+	retryDelay = 100 * time.Millisecond
+)
+
+func TestDownloadToFile_Success(t *testing.T) {
+	// Create a test server that responds successfully
+	content := "test file content"
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte(content))
+	}))
+	defer server.Close()
+
+	// Create a temporary file for download
+	tempDir := t.TempDir()
+	dstFile := filepath.Join(tempDir, "downloaded.txt")
+
+	// Download the file
+	err := DownloadToFile(context.Background(), retryDelay, server.URL, dstFile)
+	if err != nil {
+		t.Fatalf("expected no error, got: %v", err)
+	}
+
+	// Verify the file content
+	data, err := os.ReadFile(dstFile)
+	if err != nil {
+		t.Fatalf("failed to read downloaded file: %v", err)
+	}
+
+	if string(data) != content {
+		t.Errorf("expected content %q, got %q", content, string(data))
+	}
+}
+
+func TestDownloadToFile_SuccessAfterRetry(t *testing.T) {
+	content := "test file content after retry"
+	var attemptCount atomic.Int32
+
+	// Create a test server that fails on first attempt, succeeds on second
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		attempt := attemptCount.Add(1)
+		if attempt == 1 {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte("error"))
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte(content))
+	}))
+	defer server.Close()
+
+	// Create a temporary file for download
+	tempDir := t.TempDir()
+	dstFile := filepath.Join(tempDir, "downloaded.txt")
+
+	// Download the file (should succeed after retry)
+	if err := DownloadToFile(context.Background(), 10*time.Millisecond, server.URL, dstFile); err != nil {
+		t.Fatalf("expected no error after retry, got: %v", err)
+	}
+
+	// Verify the file content
+	data, err := os.ReadFile(dstFile)
+	if err != nil {
+		t.Fatalf("failed to read downloaded file: %v", err)
+	}
+
+	if string(data) != content {
+		t.Errorf("expected content %q, got %q", content, string(data))
+	}
+
+	// Verify it took 2 attempts
+	if attemptCount.Load() != 2 {
+		t.Errorf("expected 2 attempts, got %d", attemptCount.Load())
+	}
+}
+
+func TestDownloadToFile_FailsAfterRetry(t *testing.T) {
+	var attemptCount atomic.Int32
+
+	// Create a test server that always fails
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		attemptCount.Add(1)
+		w.WriteHeader(http.StatusInternalServerError)
+		_, _ = w.Write([]byte("error"))
+	}))
+	defer server.Close()
+
+	// Create a temporary file for download
+	tempDir := t.TempDir()
+	dstFile := filepath.Join(tempDir, "downloaded.txt")
+
+	// Download the file (should fail after retry)
+	if err := DownloadToFile(context.Background(), 10*time.Millisecond, server.URL, dstFile); err == nil {
+		t.Fatal("expected error after retry, got nil")
+	}
+
+	// Verify it tried 2 times
+	if attemptCount.Load() != 2 {
+		t.Errorf("expected 2 attempts, got %d", attemptCount.Load())
+	}
+}
+
+func TestDownloadToFile_ContextCancellationDuringRetry(t *testing.T) {
+	var attemptCount atomic.Int32
+
+	// Create a test server that always fails
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		attemptCount.Add(1)
+		w.WriteHeader(http.StatusInternalServerError)
+	}))
+	defer server.Close()
+
+	// Create a temporary file for download
+	tempDir := t.TempDir()
+	dstFile := filepath.Join(tempDir, "downloaded.txt")
+
+	// Create a context that will be cancelled during retry delay
+	ctx, cancel := context.WithCancel(context.Background())
+
+	// Cancel after a short delay (during the retry sleep)
+	go func() {
+		time.Sleep(100 * time.Millisecond)
+		cancel()
+	}()
+
+	// Download the file (should fail due to context cancellation during retry)
+	err := DownloadToFile(ctx, 1*time.Second, server.URL, dstFile)
+	if err == nil {
+		t.Fatal("expected error due to context cancellation, got nil")
+	}
+
+	// Should have only made 1 attempt (cancelled during retry delay)
+	if attemptCount.Load() != 1 {
+		t.Errorf("expected 1 attempt, got %d", attemptCount.Load())
+	}
+}
+
+func TestDownloadToFile_InvalidURL(t *testing.T) {
+	tempDir := t.TempDir()
+	dstFile := filepath.Join(tempDir, "downloaded.txt")
+
+	err := DownloadToFile(context.Background(), retryDelay, "://invalid-url", dstFile)
+	if err == nil {
+		t.Fatal("expected error for invalid URL, got nil")
+	}
+}
+
+func TestDownloadToFile_InvalidDestination(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte("test"))
+	}))
+	defer server.Close()
+
+	// Use an invalid destination path
+	err := DownloadToFile(context.Background(), retryDelay, server.URL, "/invalid/path/that/does/not/exist/file.txt")
+	if err == nil {
+		t.Fatal("expected error for invalid destination, got nil")
+	}
+}
+
+func TestDownloadToFile_NoRetry(t *testing.T) {
+	var attemptCount atomic.Int32
+
+	// Create a test server that always fails
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		attemptCount.Add(1)
+		w.WriteHeader(http.StatusInternalServerError)
+		_, _ = w.Write([]byte("error"))
+	}))
+	defer server.Close()
+
+	// Create a temporary file for download
+	tempDir := t.TempDir()
+	dstFile := filepath.Join(tempDir, "downloaded.txt")
+
+	// Download the file with retryDelay = 0 (should not retry)
+	if err := DownloadToFile(context.Background(), 0, server.URL, dstFile); err == nil {
+		t.Fatal("expected error, got nil")
+	}
+
+	// Verify it only made 1 attempt (no retry)
+	if attemptCount.Load() != 1 {
+		t.Errorf("expected 1 attempt, got %d", attemptCount.Load())
+	}
+}

client/internal/updatemanager/installer/binary_nowindows.go

@@ -0,0 +1,7 @@
+//go:build !windows
+
+package installer
+
+func UpdaterBinaryNameWithoutExtension() string {
+	return updaterBinary
+}

client/internal/updatemanager/installer/binary_windows.go

@@ -0,0 +1,11 @@
+package installer
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+func UpdaterBinaryNameWithoutExtension() string {
+	ext := filepath.Ext(updaterBinary)
+	return strings.TrimSuffix(updaterBinary, ext)
+}

client/internal/updatemanager/installer/doc.go

@@ -0,0 +1,111 @@
+// Package installer provides functionality for managing NetBird application
+// updates and installations across Windows, macOS. It handles
+// the complete update lifecycle including artifact download, cryptographic verification,
+// installation execution, process management, and result reporting.
+//
+// # Architecture
+//
+// The installer package uses a two-process architecture to enable self-updates:
+//
+//  1. Service Process: The main NetBird daemon process that initiates updates
+//  2. Updater Process: A detached child process that performs the actual installation
+//
+// This separation is critical because:
+//   - The service binary cannot update itself while running
+//   - The installer (EXE/MSI/PKG) will terminate the service during installation
+//   - The updater process survives service termination and restarts it after installation
+//   - Results can be communicated back to the service after it restarts
+//
+// # Update Flow
+//
+// Service Process (RunInstallation):
+//
+//  1. Validates target version format (semver)
+//  2. Determines installer type (EXE, MSI, PKG, or Homebrew)
+//  3. Downloads installer file from GitHub releases (if applicable)
+//  4. Verifies installer signature using reposign package (cryptographic verification in service process before
+//     launching updater)
+//  5. Copies service binary to tempDir as "updater" (or "updater.exe" on Windows)
+//  6. Launches updater process with detached mode:
+//     - --temp-dir: Temporary directory path
+//     - --service-dir: Service installation directory
+//     - --installer-file: Path to downloaded installer (if applicable)
+//     - --dry-run: Optional flag to test without actually installing
+//  7. Service process continues running (will be terminated by installer later)
+//  8. Service can watch for result.json using ResultHandler.Watch() to detect completion
+//
+// Updater Process (Setup):
+//
+//  1. Receives parameters from service via command-line arguments
+//  2. Runs installer with appropriate silent/quiet flags:
+//     - Windows EXE: installer.exe /S
+//     - Windows MSI: msiexec.exe /i installer.msi /quiet /qn /l*v msi.log
+//     - macOS PKG: installer -pkg installer.pkg -target /
+//     - macOS Homebrew: brew upgrade netbirdio/tap/netbird
+//  3. Installer terminates daemon and UI processes
+//  4. Installer replaces binaries with new version
+//  5. Updater waits for installer to complete
+//  6. Updater restarts daemon:
+//     - Windows: netbird.exe service start
+//     - macOS/Linux: netbird service start
+//  7. Updater restarts UI:
+//     - Windows: Launches netbird-ui.exe as active console user using CreateProcessAsUser
+//     - macOS: Uses launchctl asuser to launch NetBird.app for console user
+//     - Linux: Not implemented (UI typically auto-starts)
+//  8. Updater writes result.json with success/error status
+//  9. Updater process exits
+//
+// # Result Communication
+//
+// The ResultHandler (result.go) manages communication between updater and service:
+//
+// Result Structure:
+//
+//	type Result struct {
+//	    Success    bool      // true if installation succeeded
+//	    Error      string    // error message if Success is false
+//	    ExecutedAt time.Time // when installation completed
+//	}
+//
+// Result files are automatically cleaned up after being read.
+//
+// # File Locations
+//
+// Temporary Directory (platform-specific):
+//
+// Windows:
+//   - Path: %ProgramData%\Netbird\tmp-install
+//   - Example: C:\ProgramData\Netbird\tmp-install
+//
+// macOS:
+//   - Path: /var/lib/netbird/tmp-install
+//   - Requires root permissions
+//
+// Files created during installation:
+//
+//		tmp-install/
+//	   installer.log
+//		  updater[.exe]                    # Copy of service binary
+//		  netbird_installer_*.[exe|msi|pkg] # Downloaded installer
+//		  result.json                       # Installation result
+//		  msi.log                           # MSI verbose log (Windows MSI only)
+//
+// # API Reference
+//
+// # Cleanup
+//
+// CleanUpInstallerFiles() removes temporary files after successful installation:
+//   - Downloaded installer files (*.exe, *.msi, *.pkg)
+//   - Updater binary copy
+//   - Does NOT remove result.json (cleaned by ResultHandler after read)
+//   - Does NOT remove msi.log (kept for debugging)
+//
+// # Dry-Run Mode
+//
+// Dry-run mode allows testing the update process without actually installing:
+//
+// Enable via environment variable:
+//
+//	export NB_AUTO_UPDATE_DRY_RUN=true
+//	netbird service install-update 0.29.0
+package installer

client/internal/updatemanager/installer/installer.go

@@ -0,0 +1,50 @@
+//go:build !windows && !darwin
+
+package installer
+
+import (
+	"context"
+	"fmt"
+)
+
+const (
+	updaterBinary = "updater"
+)
+
+type Installer struct {
+	tempDir string
+}
+
+// New used by the service
+func New() *Installer {
+	return &Installer{}
+}
+
+// NewWithDir used by the updater process, get the tempDir from the service via cmd line
+func NewWithDir(tempDir string) *Installer {
+	return &Installer{
+		tempDir: tempDir,
+	}
+}
+
+func (u *Installer) TempDir() string {
+	return ""
+}
+
+func (c *Installer) LogFiles() []string {
+	return []string{}
+}
+
+func (u *Installer) CleanUpInstallerFiles() error {
+	return nil
+}
+
+func (u *Installer) RunInstallation(ctx context.Context, targetVersion string) error {
+	return fmt.Errorf("unsupported platform")
+}
+
+// Setup runs the installer with appropriate arguments and manages the daemon/UI state
+// This will be run by the updater process
+func (u *Installer) Setup(ctx context.Context, dryRun bool, targetVersion string, daemonFolder string) (resultErr error) {
+	return fmt.Errorf("unsupported platform")
+}

client/internal/updatemanager/installer/installer_common.go

@@ -0,0 +1,293 @@
+//go:build windows || darwin
+
+package installer
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/hashicorp/go-multierror"
+	goversion "github.com/hashicorp/go-version"
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/downloader"
+	"github.com/netbirdio/netbird/client/internal/updatemanager/reposign"
+)
+
+type Installer struct {
+	tempDir string
+}
+
+// New used by the service
+func New() *Installer {
+	return &Installer{
+		tempDir: defaultTempDir,
+	}
+}
+
+// NewWithDir used by the updater process, get the tempDir from the service via cmd line
+func NewWithDir(tempDir string) *Installer {
+	return &Installer{
+		tempDir: tempDir,
+	}
+}
+
+// RunInstallation starts the updater process to run the installation
+// This will run by the original service process
+func (u *Installer) RunInstallation(ctx context.Context, targetVersion string) (err error) {
+	resultHandler := NewResultHandler(u.tempDir)
+
+	defer func() {
+		if err != nil {
+			if writeErr := resultHandler.WriteErr(err); writeErr != nil {
+				log.Errorf("failed to write error result: %v", writeErr)
+			}
+		}
+	}()
+
+	if err := validateTargetVersion(targetVersion); err != nil {
+		return err
+	}
+
+	if err := u.mkTempDir(); err != nil {
+		return err
+	}
+
+	var installerFile string
+	// Download files only when not using any third-party store
+	if installerType := TypeOfInstaller(ctx); installerType.Downloadable() {
+		log.Infof("download installer")
+		var err error
+		installerFile, err = u.downloadInstaller(ctx, installerType, targetVersion)
+		if err != nil {
+			log.Errorf("failed to download installer: %v", err)
+			return err
+		}
+
+		artifactVerify, err := reposign.NewArtifactVerify(DefaultSigningKeysBaseURL)
+		if err != nil {
+			log.Errorf("failed to create artifact verify: %v", err)
+			return err
+		}
+
+		if err := artifactVerify.Verify(ctx, targetVersion, installerFile); err != nil {
+			log.Errorf("artifact verification error: %v", err)
+			return err
+		}
+	}
+
+	log.Infof("running installer")
+	updaterPath, err := u.copyUpdater()
+	if err != nil {
+		return err
+	}
+
+	// the directory where the service has been installed
+	workspace, err := getServiceDir()
+	if err != nil {
+		return err
+	}
+
+	args := []string{
+		"--temp-dir", u.tempDir,
+		"--service-dir", workspace,
+	}
+
+	if isDryRunEnabled() {
+		args = append(args, "--dry-run=true")
+	}
+
+	if installerFile != "" {
+		args = append(args, "--installer-file", installerFile)
+	}
+
+	updateCmd := exec.Command(updaterPath, args...)
+	log.Infof("starting updater process: %s", updateCmd.String())
+
+	// Configure the updater to run in a separate session/process group
+	// so it survives the parent daemon being stopped
+	setUpdaterProcAttr(updateCmd)
+
+	// Start the updater process asynchronously
+	if err := updateCmd.Start(); err != nil {
+		return err
+	}
+
+	pid := updateCmd.Process.Pid
+	log.Infof("updater started with PID %d", pid)
+
+	// Release the process so the OS can fully detach it
+	if err := updateCmd.Process.Release(); err != nil {
+		log.Warnf("failed to release updater process: %v", err)
+	}
+
+	return nil
+}
+
+// CleanUpInstallerFiles
+// - the installer file (pkg, exe, msi)
+// - the selfcopy updater.exe
+func (u *Installer) CleanUpInstallerFiles() error {
+	// Check if tempDir exists
+	info, err := os.Stat(u.tempDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+
+	if !info.IsDir() {
+		return nil
+	}
+
+	var merr *multierror.Error
+
+	if err := os.Remove(filepath.Join(u.tempDir, updaterBinary)); err != nil && !os.IsNotExist(err) {
+		merr = multierror.Append(merr, fmt.Errorf("failed to remove updater binary: %w", err))
+	}
+
+	entries, err := os.ReadDir(u.tempDir)
+	if err != nil {
+		return err
+	}
+
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+
+		name := entry.Name()
+		for _, ext := range binaryExtensions {
+			if strings.HasSuffix(strings.ToLower(name), strings.ToLower(ext)) {
+				if err := os.Remove(filepath.Join(u.tempDir, name)); err != nil {
+					merr = multierror.Append(merr, fmt.Errorf("failed to remove %s: %w", name, err))
+				}
+				break
+			}
+		}
+	}
+
+	return merr.ErrorOrNil()
+}
+
+func (u *Installer) downloadInstaller(ctx context.Context, installerType Type, targetVersion string) (string, error) {
+	fileURL := urlWithVersionArch(installerType, targetVersion)
+
+	// Clean up temp directory on error
+	var success bool
+	defer func() {
+		if !success {
+			if err := os.RemoveAll(u.tempDir); err != nil {
+				log.Errorf("error cleaning up temporary directory: %v", err)
+			}
+		}
+	}()
+
+	fileName := path.Base(fileURL)
+	if fileName == "." || fileName == "/" || fileName == "" {
+		return "", fmt.Errorf("invalid file URL: %s", fileURL)
+	}
+
+	outputFilePath := filepath.Join(u.tempDir, fileName)
+	if err := downloader.DownloadToFile(ctx, downloader.DefaultRetryDelay, fileURL, outputFilePath); err != nil {
+		return "", err
+	}
+
+	success = true
+	return outputFilePath, nil
+}
+
+func (u *Installer) TempDir() string {
+	return u.tempDir
+}
+
+func (u *Installer) mkTempDir() error {
+	if err := os.MkdirAll(u.tempDir, 0o755); err != nil {
+		log.Debugf("failed to create tempdir: %s", u.tempDir)
+		return err
+	}
+	return nil
+}
+
+func (u *Installer) copyUpdater() (string, error) {
+	src, err := getServiceBinary()
+	if err != nil {
+		return "", fmt.Errorf("failed to get updater binary: %w", err)
+	}
+
+	dst := filepath.Join(u.tempDir, updaterBinary)
+	if err := copyFile(src, dst); err != nil {
+		return "", fmt.Errorf("failed to copy updater binary: %w", err)
+	}
+
+	if err := os.Chmod(dst, 0o755); err != nil {
+		return "", fmt.Errorf("failed to set permissions: %w", err)
+	}
+
+	return dst, nil
+}
+
+func validateTargetVersion(targetVersion string) error {
+	if targetVersion == "" {
+		return fmt.Errorf("target version cannot be empty")
+	}
+
+	_, err := goversion.NewVersion(targetVersion)
+	if err != nil {
+		return fmt.Errorf("invalid target version %q: %w", targetVersion, err)
+	}
+
+	return nil
+}
+
+func copyFile(src, dst string) error {
+	log.Infof("copying %s to %s", src, dst)
+	in, err := os.Open(src)
+	if err != nil {
+		return fmt.Errorf("open source: %w", err)
+	}
+	defer func() {
+		if err := in.Close(); err != nil {
+			log.Warnf("failed to close source file: %v", err)
+		}
+	}()
+
+	out, err := os.Create(dst)
+	if err != nil {
+		return fmt.Errorf("create destination: %w", err)
+	}
+	defer func() {
+		if err := out.Close(); err != nil {
+			log.Warnf("failed to close destination file: %v", err)
+		}
+	}()
+
+	if _, err := io.Copy(out, in); err != nil {
+		return fmt.Errorf("copy: %w", err)
+	}
+
+	return nil
+}
+
+func getServiceDir() (string, error) {
+	exePath, err := os.Executable()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Dir(exePath), nil
+}
+
+func getServiceBinary() (string, error) {
+	return os.Executable()
+}
+
+func isDryRunEnabled() bool {
+	return strings.EqualFold(strings.TrimSpace(os.Getenv("NB_AUTO_UPDATE_DRY_RUN")), "true")
+}

client/internal/updatemanager/installer/installer_log_darwin.go

@@ -0,0 +1,11 @@
+package installer
+
+import (
+	"path/filepath"
+)
+
+func (u *Installer) LogFiles() []string {
+	return []string{
+		filepath.Join(u.tempDir, LogFile),
+	}
+}

client/internal/updatemanager/installer/installer_log_windows.go

@@ -0,0 +1,12 @@
+package installer
+
+import (
+	"path/filepath"
+)
+
+func (u *Installer) LogFiles() []string {
+	return []string{
+		filepath.Join(u.tempDir, msiLogFile),
+		filepath.Join(u.tempDir, LogFile),
+	}
+}

client/internal/updatemanager/installer/installer_run_darwin.go

@@ -0,0 +1,238 @@
+package installer
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"os/user"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"syscall"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	daemonName    = "netbird"
+	updaterBinary = "updater"
+	uiBinary      = "/Applications/NetBird.app"
+
+	defaultTempDir = "/var/lib/netbird/tmp-install"
+
+	pkgDownloadURL = "https://github.com/mlsmaycon/netbird/releases/download/v%version/netbird_%version_darwin_%arch.pkg"
+)
+
+var (
+	binaryExtensions = []string{"pkg"}
+)
+
+// Setup runs the installer with appropriate arguments and manages the daemon/UI state
+// This will be run by the updater process
+func (u *Installer) Setup(ctx context.Context, dryRun bool, installerFile string, daemonFolder string) (resultErr error) {
+	resultHandler := NewResultHandler(u.tempDir)
+
+	// Always ensure daemon and UI are restarted after setup
+	defer func() {
+		log.Infof("write out result")
+		var err error
+		if resultErr == nil {
+			err = resultHandler.WriteSuccess()
+		} else {
+			err = resultHandler.WriteErr(resultErr)
+		}
+		if err != nil {
+			log.Errorf("failed to write update result: %v", err)
+		}
+
+		// skip service restart if dry-run mode is enabled
+		if dryRun {
+			return
+		}
+
+		log.Infof("starting daemon back")
+		if err := u.startDaemon(daemonFolder); err != nil {
+			log.Errorf("failed to start daemon: %v", err)
+		}
+
+		log.Infof("starting UI back")
+		if err := u.startUIAsUser(); err != nil {
+			log.Errorf("failed to start UI: %v", err)
+		}
+
+	}()
+
+	if dryRun {
+		time.Sleep(7 * time.Second)
+		log.Infof("dry-run mode enabled, skipping actual installation")
+		resultErr = fmt.Errorf("dry-run mode enabled")
+		return
+	}
+
+	switch TypeOfInstaller(ctx) {
+	case TypePKG:
+		resultErr = u.installPkgFile(ctx, installerFile)
+	case TypeHomebrew:
+		resultErr = u.updateHomeBrew(ctx)
+	}
+
+	return resultErr
+}
+
+func (u *Installer) startDaemon(daemonFolder string) error {
+	log.Infof("starting netbird service")
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	cmd := exec.CommandContext(ctx, filepath.Join(daemonFolder, daemonName), "service", "start")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		log.Warnf("failed to start netbird service: %v, output: %s", err, string(output))
+		return err
+	}
+	log.Infof("netbird service started successfully")
+	return nil
+}
+
+func (u *Installer) startUIAsUser() error {
+	log.Infof("starting netbird-ui: %s", uiBinary)
+
+	// Get the current console user
+	cmd := exec.Command("stat", "-f", "%Su", "/dev/console")
+	output, err := cmd.Output()
+	if err != nil {
+		return fmt.Errorf("failed to get console user: %w", err)
+	}
+
+	username := strings.TrimSpace(string(output))
+	if username == "" || username == "root" {
+		return fmt.Errorf("no active user session found")
+	}
+
+	log.Infof("starting UI for user: %s", username)
+
+	// Get user's UID
+	userInfo, err := user.Lookup(username)
+	if err != nil {
+		return fmt.Errorf("failed to lookup user %s: %w", username, err)
+	}
+
+	// Start the UI process as the console user using launchctl
+	// This ensures the app runs in the user's context with proper GUI access
+	launchCmd := exec.Command("launchctl", "asuser", userInfo.Uid, "open", "-a", uiBinary)
+	log.Infof("launchCmd: %s", launchCmd.String())
+	// Set the user's home directory for proper macOS app behavior
+	launchCmd.Env = append(os.Environ(), "HOME="+userInfo.HomeDir)
+	log.Infof("set HOME environment variable: %s", userInfo.HomeDir)
+
+	if err := launchCmd.Start(); err != nil {
+		return fmt.Errorf("failed to start UI process: %w", err)
+	}
+
+	// Release the process so it can run independently
+	if err := launchCmd.Process.Release(); err != nil {
+		log.Warnf("failed to release UI process: %v", err)
+	}
+
+	log.Infof("netbird-ui started successfully for user %s", username)
+	return nil
+}
+
+func (u *Installer) installPkgFile(ctx context.Context, path string) error {
+	log.Infof("installing pkg file: %s", path)
+
+	// Kill any existing UI processes before installation
+	// This ensures the postinstall script's "open $APP" will start the new version
+	u.killUI()
+
+	volume := "/"
+
+	cmd := exec.CommandContext(ctx, "installer", "-pkg", path, "-target", volume)
+	if err := cmd.Start(); err != nil {
+		return fmt.Errorf("error running pkg file: %w", err)
+	}
+	log.Infof("installer started with PID %d", cmd.Process.Pid)
+	if err := cmd.Wait(); err != nil {
+		return fmt.Errorf("error running pkg file: %w", err)
+	}
+	log.Infof("pkg file installed successfully")
+	return nil
+}
+
+func (u *Installer) updateHomeBrew(ctx context.Context) error {
+	log.Infof("updating homebrew")
+
+	// Kill any existing UI processes before upgrade
+	// This ensures the new version will be started after upgrade
+	u.killUI()
+
+	// Homebrew must be run as a non-root user
+	// To find out which user installed NetBird using HomeBrew we can check the owner of our brew tap directory
+	// Check both Apple Silicon and Intel Mac paths
+	brewTapPath := "/opt/homebrew/Library/Taps/netbirdio/homebrew-tap/"
+	brewBinPath := "/opt/homebrew/bin/brew"
+	if _, err := os.Stat(brewTapPath); os.IsNotExist(err) {
+		// Try Intel Mac path
+		brewTapPath = "/usr/local/Homebrew/Library/Taps/netbirdio/homebrew-tap/"
+		brewBinPath = "/usr/local/bin/brew"
+	}
+
+	fileInfo, err := os.Stat(brewTapPath)
+	if err != nil {
+		return fmt.Errorf("error getting homebrew installation path info: %w", err)
+	}
+
+	fileSysInfo, ok := fileInfo.Sys().(*syscall.Stat_t)
+	if !ok {
+		return fmt.Errorf("error checking file owner, sysInfo type is %T not *syscall.Stat_t", fileInfo.Sys())
+	}
+
+	// Get username from UID
+	brewUser, err := user.LookupId(fmt.Sprintf("%d", fileSysInfo.Uid))
+	if err != nil {
+		return fmt.Errorf("error looking up brew installer user: %w", err)
+	}
+	userName := brewUser.Username
+	// Get user HOME, required for brew to run correctly
+	// https://github.com/Homebrew/brew/issues/15833
+	homeDir := brewUser.HomeDir
+
+	// Check if netbird-ui is installed (must run as the brew user, not root)
+	checkUICmd := exec.CommandContext(ctx, "sudo", "-u", userName, brewBinPath, "list", "--formula", "netbirdio/tap/netbird-ui")
+	checkUICmd.Env = append(os.Environ(), "HOME="+homeDir)
+	uiInstalled := checkUICmd.Run() == nil
+
+	// Homebrew does not support installing specific versions
+	// Thus it will always update to latest and ignore targetVersion
+	upgradeArgs := []string{"-u", userName, brewBinPath, "upgrade", "netbirdio/tap/netbird"}
+	if uiInstalled {
+		upgradeArgs = append(upgradeArgs, "netbirdio/tap/netbird-ui")
+	}
+
+	cmd := exec.CommandContext(ctx, "sudo", upgradeArgs...)
+	cmd.Env = append(os.Environ(), "HOME="+homeDir)
+
+	if output, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("error running brew upgrade: %w, output: %s", err, string(output))
+	}
+
+	log.Infof("homebrew updated successfully")
+	return nil
+}
+
+func (u *Installer) killUI() {
+	log.Infof("killing existing netbird-ui processes")
+	cmd := exec.Command("pkill", "-x", "netbird-ui")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		// pkill returns exit code 1 if no processes matched, which is fine
+		log.Debugf("pkill netbird-ui result: %v, output: %s", err, string(output))
+	} else {
+		log.Infof("netbird-ui processes killed")
+	}
+}
+
+func urlWithVersionArch(_ Type, version string) string {
+	url := strings.ReplaceAll(pkgDownloadURL, "%version", version)
+	return strings.ReplaceAll(url, "%arch", runtime.GOARCH)
+}

client/internal/updatemanager/installer/installer_run_windows.go

@@ -0,0 +1,213 @@
+package installer
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"time"
+	"unsafe"
+
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/windows"
+)
+
+const (
+	daemonName    = "netbird.exe"
+	uiName        = "netbird-ui.exe"
+	updaterBinary = "updater.exe"
+
+	msiLogFile = "msi.log"
+
+	msiDownloadURL = "https://github.com/mlsmaycon/netbird/releases/download/v%version/netbird_installer_%version_windows_%arch.msi"
+	exeDownloadURL = "https://github.com/mlsmaycon/netbird/releases/download/v%version/netbird_installer_%version_windows_%arch.exe"
+)
+
+var (
+	defaultTempDir = filepath.Join(os.Getenv("ProgramData"), "Netbird", "tmp-install")
+
+	// for the cleanup
+	binaryExtensions = []string{"msi", "exe"}
+)
+
+// Setup runs the installer with appropriate arguments and manages the daemon/UI state
+// This will be run by the updater process
+func (u *Installer) Setup(ctx context.Context, dryRun bool, installerFile string, daemonFolder string) (resultErr error) {
+	resultHandler := NewResultHandler(u.tempDir)
+
+	// Always ensure daemon and UI are restarted after setup
+	defer func() {
+		log.Infof("starting daemon back")
+		if err := u.startDaemon(daemonFolder); err != nil {
+			log.Errorf("failed to start daemon: %v", err)
+		}
+
+		log.Infof("starting UI back")
+		if err := u.startUIAsUser(daemonFolder); err != nil {
+			log.Errorf("failed to start UI: %v", err)
+		}
+
+		log.Infof("write out result")
+		var err error
+		if resultErr == nil {
+			err = resultHandler.WriteSuccess()
+		} else {
+			err = resultHandler.WriteErr(resultErr)
+		}
+		if err != nil {
+			log.Errorf("failed to write update result: %v", err)
+		}
+	}()
+
+	if dryRun {
+		log.Infof("dry-run mode enabled, skipping actual installation")
+		resultErr = fmt.Errorf("dry-run mode enabled")
+		return
+	}
+
+	installerType, err := typeByFileExtension(installerFile)
+	if err != nil {
+		log.Debugf("%v", err)
+		resultErr = err
+		return
+	}
+
+	var cmd *exec.Cmd
+	switch installerType {
+	case TypeExe:
+		log.Infof("run exe installer: %s", installerFile)
+		cmd = exec.CommandContext(ctx, installerFile, "/S")
+	default:
+		installerDir := filepath.Dir(installerFile)
+		logPath := filepath.Join(installerDir, msiLogFile)
+		log.Infof("run msi installer: %s", installerFile)
+		cmd = exec.CommandContext(ctx, "msiexec.exe", "/i", filepath.Base(installerFile), "/quiet", "/qn", "/l*v", logPath)
+	}
+
+	cmd.Dir = filepath.Dir(installerFile)
+
+	if resultErr = cmd.Start(); resultErr != nil {
+		log.Errorf("error starting installer: %v", resultErr)
+		return
+	}
+
+	log.Infof("installer started with PID %d", cmd.Process.Pid)
+	if resultErr = cmd.Wait(); resultErr != nil {
+		log.Errorf("installer process finished with error: %v", resultErr)
+		return
+	}
+
+	return nil
+}
+
+func (u *Installer) startDaemon(daemonFolder string) error {
+	log.Infof("starting netbird service")
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	cmd := exec.CommandContext(ctx, filepath.Join(daemonFolder, daemonName), "service", "start")
+	if output, err := cmd.CombinedOutput(); err != nil {
+		log.Debugf("failed to start netbird service: %v, output: %s", err, string(output))
+		return err
+	}
+	log.Infof("netbird service started successfully")
+	return nil
+}
+
+func (u *Installer) startUIAsUser(daemonFolder string) error {
+	uiPath := filepath.Join(daemonFolder, uiName)
+	log.Infof("starting netbird-ui: %s", uiPath)
+
+	// Get the active console session ID
+	sessionID := windows.WTSGetActiveConsoleSessionId()
+	if sessionID == 0xFFFFFFFF {
+		return fmt.Errorf("no active user session found")
+	}
+
+	// Get the user token for that session
+	var userToken windows.Token
+	err := windows.WTSQueryUserToken(sessionID, &userToken)
+	if err != nil {
+		return fmt.Errorf("failed to query user token: %w", err)
+	}
+	defer func() {
+		if err := userToken.Close(); err != nil {
+			log.Warnf("failed to close user token: %v", err)
+		}
+	}()
+
+	// Duplicate the token to a primary token
+	var primaryToken windows.Token
+	err = windows.DuplicateTokenEx(
+		userToken,
+		windows.MAXIMUM_ALLOWED,
+		nil,
+		windows.SecurityImpersonation,
+		windows.TokenPrimary,
+		&primaryToken,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to duplicate token: %w", err)
+	}
+	defer func() {
+		if err := primaryToken.Close(); err != nil {
+			log.Warnf("failed to close token: %v", err)
+		}
+	}()
+
+	// Prepare startup info
+	var si windows.StartupInfo
+	si.Cb = uint32(unsafe.Sizeof(si))
+	si.Desktop = windows.StringToUTF16Ptr("winsta0\\default")
+
+	var pi windows.ProcessInformation
+
+	cmdLine, err := windows.UTF16PtrFromString(fmt.Sprintf("\"%s\"", uiPath))
+	if err != nil {
+		return fmt.Errorf("failed to convert path to UTF16: %w", err)
+	}
+
+	creationFlags := uint32(0x00000200 | 0x00000008 | 0x00000400) // CREATE_NEW_PROCESS_GROUP | DETACHED_PROCESS | CREATE_UNICODE_ENVIRONMENT
+
+	err = windows.CreateProcessAsUser(
+		primaryToken,
+		nil,
+		cmdLine,
+		nil,
+		nil,
+		false,
+		creationFlags,
+		nil,
+		nil,
+		&si,
+		&pi,
+	)
+	if err != nil {
+		return fmt.Errorf("CreateProcessAsUser failed: %w", err)
+	}
+
+	// Close handles
+	if err := windows.CloseHandle(pi.Process); err != nil {
+		log.Warnf("failed to close process handle: %v", err)
+	}
+	if err := windows.CloseHandle(pi.Thread); err != nil {
+		log.Warnf("failed to close thread handle: %v", err)
+	}
+
+	log.Infof("netbird-ui started successfully in session %d", sessionID)
+	return nil
+}
+
+func urlWithVersionArch(it Type, version string) string {
+	var url string
+	if it == TypeExe {
+		url = exeDownloadURL
+	} else {
+		url = msiDownloadURL
+	}
+	url = strings.ReplaceAll(url, "%version", version)
+	return strings.ReplaceAll(url, "%arch", runtime.GOARCH)
+}

client/internal/updatemanager/installer/log.go

@@ -0,0 +1,5 @@
+package installer
+
+const (
+	LogFile = "installer.log"
+)

client/internal/updatemanager/installer/procattr_darwin.go

@@ -0,0 +1,15 @@
+package installer
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// setUpdaterProcAttr configures the updater process to run in a new session,
+// making it independent of the parent daemon process. This ensures the updater
+// survives when the daemon is stopped during the pkg installation.
+func setUpdaterProcAttr(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setsid: true,
+	}
+}

client/internal/updatemanager/installer/procattr_windows.go

@@ -0,0 +1,14 @@
+package installer
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// setUpdaterProcAttr configures the updater process to run detached from the parent,
+// making it independent of the parent daemon process.
+func setUpdaterProcAttr(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP | 0x00000008, // 0x00000008 is DETACHED_PROCESS
+	}
+}

client/internal/updatemanager/installer/repourl_dev.go

@@ -0,0 +1,7 @@
+//go:build devartifactsign
+
+package installer
+
+const (
+	DefaultSigningKeysBaseURL = "http://192.168.0.10:9089/signrepo"
+)

client/internal/updatemanager/installer/repourl_prod.go

@@ -0,0 +1,7 @@
+//go:build !devartifactsign
+
+package installer
+
+const (
+	DefaultSigningKeysBaseURL = "https://publickeys.netbird.io/artifact-signatures"
+)

client/internal/updatemanager/installer/result.go

@@ -0,0 +1,230 @@
+package installer
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/fsnotify/fsnotify"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	resultFile = "result.json"
+)
+
+type Result struct {
+	Success    bool
+	Error      string
+	ExecutedAt time.Time
+}
+
+// ResultHandler handles reading and writing update results
+type ResultHandler struct {
+	resultFile string
+}
+
+// NewResultHandler creates a new communicator with the given directory path
+// The result file will be created as "result.json" in the specified directory
+func NewResultHandler(installerDir string) *ResultHandler {
+	// Create it if it doesn't exist
+	// do not care if already exists
+	_ = os.MkdirAll(installerDir, 0o700)
+
+	rh := &ResultHandler{
+		resultFile: filepath.Join(installerDir, resultFile),
+	}
+	return rh
+}
+
+func (rh *ResultHandler) GetErrorResultReason() string {
+	result, err := rh.tryReadResult()
+	if err == nil && !result.Success {
+		return result.Error
+	}
+
+	if err := rh.cleanup(); err != nil {
+		log.Warnf("failed to cleanup result file: %v", err)
+	}
+
+	return ""
+}
+
+func (rh *ResultHandler) WriteSuccess() error {
+	result := Result{
+		Success:    true,
+		ExecutedAt: time.Now(),
+	}
+	return rh.write(result)
+}
+
+func (rh *ResultHandler) WriteErr(errReason error) error {
+	result := Result{
+		Success:    false,
+		Error:      errReason.Error(),
+		ExecutedAt: time.Now(),
+	}
+	return rh.write(result)
+}
+
+func (rh *ResultHandler) Watch(ctx context.Context) (Result, error) {
+	log.Infof("start watching result: %s", rh.resultFile)
+
+	// Check if file already exists (updater finished before we started watching)
+	if result, err := rh.tryReadResult(); err == nil {
+		log.Infof("installer result: %v", result)
+		return result, nil
+	}
+
+	dir := filepath.Dir(rh.resultFile)
+
+	if err := rh.waitForDirectory(ctx, dir); err != nil {
+		return Result{}, err
+	}
+
+	return rh.watchForResultFile(ctx, dir)
+}
+
+func (rh *ResultHandler) waitForDirectory(ctx context.Context, dir string) error {
+	ticker := time.NewTicker(300 * time.Millisecond)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case <-ticker.C:
+			if info, err := os.Stat(dir); err == nil && info.IsDir() {
+				return nil
+			}
+		}
+	}
+}
+
+func (rh *ResultHandler) watchForResultFile(ctx context.Context, dir string) (Result, error) {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		log.Error(err)
+		return Result{}, err
+	}
+
+	defer func() {
+		if err := watcher.Close(); err != nil {
+			log.Warnf("failed to close watcher: %v", err)
+		}
+	}()
+
+	if err := watcher.Add(dir); err != nil {
+		return Result{}, fmt.Errorf("failed to watch directory: %v", err)
+	}
+
+	// Check again after setting up watcher to avoid race condition
+	// (file could have been created between initial check and watcher setup)
+	if result, err := rh.tryReadResult(); err == nil {
+		log.Infof("installer result: %v", result)
+		return result, nil
+	}
+
+	for {
+		select {
+		case <-ctx.Done():
+			return Result{}, ctx.Err()
+		case event, ok := <-watcher.Events:
+			if !ok {
+				return Result{}, errors.New("watcher closed unexpectedly")
+			}
+
+			if result, done := rh.handleWatchEvent(event); done {
+				return result, nil
+			}
+		case err, ok := <-watcher.Errors:
+			if !ok {
+				return Result{}, errors.New("watcher closed unexpectedly")
+			}
+			return Result{}, fmt.Errorf("watcher error: %w", err)
+		}
+	}
+}
+
+func (rh *ResultHandler) handleWatchEvent(event fsnotify.Event) (Result, bool) {
+	if event.Name != rh.resultFile {
+		return Result{}, false
+	}
+
+	if event.Has(fsnotify.Create) {
+		result, err := rh.tryReadResult()
+		if err != nil {
+			log.Debugf("error while reading result: %v", err)
+			return result, true
+		}
+		log.Infof("installer result: %v", result)
+		return result, true
+	}
+
+	return Result{}, false
+}
+
+// Write writes the update result to a file for the UI to read
+func (rh *ResultHandler) write(result Result) error {
+	log.Infof("write out installer result to: %s", rh.resultFile)
+	// Ensure directory exists
+	dir := filepath.Dir(rh.resultFile)
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		log.Errorf("failed to create directory %s: %v", dir, err)
+		return err
+	}
+
+	data, err := json.Marshal(result)
+	if err != nil {
+		return err
+	}
+
+	// Write to a temporary file first, then rename for atomic operation
+	tmpPath := rh.resultFile + ".tmp"
+	if err := os.WriteFile(tmpPath, data, 0o600); err != nil {
+		log.Errorf("failed to create temp file: %s", err)
+		return err
+	}
+
+	// Atomic rename
+	if err := os.Rename(tmpPath, rh.resultFile); err != nil {
+		if cleanupErr := os.Remove(tmpPath); cleanupErr != nil {
+			log.Warnf("Failed to remove temp result file: %v", err)
+		}
+		return err
+	}
+
+	return nil
+}
+
+func (rh *ResultHandler) cleanup() error {
+	err := os.Remove(rh.resultFile)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	log.Debugf("delete installer result file: %s", rh.resultFile)
+	return nil
+}
+
+// tryReadResult attempts to read and validate the result file
+func (rh *ResultHandler) tryReadResult() (Result, error) {
+	data, err := os.ReadFile(rh.resultFile)
+	if err != nil {
+		return Result{}, err
+	}
+
+	var result Result
+	if err := json.Unmarshal(data, &result); err != nil {
+		return Result{}, fmt.Errorf("invalid result format: %w", err)
+	}
+
+	if err := rh.cleanup(); err != nil {
+		log.Warnf("failed to cleanup result file: %v", err)
+	}
+
+	return result, nil
+}

client/internal/updatemanager/installer/types.go

@@ -0,0 +1,14 @@
+package installer
+
+type Type struct {
+	name         string
+	downloadable bool
+}
+
+func (t Type) String() string {
+	return t.name
+}
+
+func (t Type) Downloadable() bool {
+	return t.downloadable
+}

client/internal/updatemanager/installer/types_darwin.go

@@ -0,0 +1,22 @@
+package installer
+
+import (
+	"context"
+	"os/exec"
+)
+
+var (
+	TypeHomebrew = Type{name: "Homebrew", downloadable: false}
+	TypePKG      = Type{name: "pkg", downloadable: true}
+)
+
+func TypeOfInstaller(ctx context.Context) Type {
+	cmd := exec.CommandContext(ctx, "pkgutil", "--pkg-info", "io.netbird.client")
+	_, err := cmd.Output()
+	if err != nil && cmd.ProcessState.ExitCode() == 1 {
+		// Not installed using pkg file, thus installed using Homebrew
+
+		return TypeHomebrew
+	}
+	return TypePKG
+}

client/internal/updatemanager/installer/types_windows.go

@@ -0,0 +1,51 @@
+package installer
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/windows/registry"
+)
+
+const (
+	uninstallKeyPath64 = `SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Netbird`
+	uninstallKeyPath32 = `SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Netbird`
+)
+
+var (
+	TypeExe = Type{name: "EXE", downloadable: true}
+	TypeMSI = Type{name: "MSI", downloadable: true}
+)
+
+func TypeOfInstaller(_ context.Context) Type {
+	paths := []string{uninstallKeyPath64, uninstallKeyPath32}
+
+	for _, path := range paths {
+		k, err := registry.OpenKey(registry.LOCAL_MACHINE, path, registry.QUERY_VALUE)
+		if err != nil {
+			continue
+		}
+
+		if err := k.Close(); err != nil {
+			log.Warnf("Error closing registry key: %v", err)
+		}
+		return TypeExe
+
+	}
+
+	log.Debug("No registry entry found for Netbird, assuming MSI installation")
+	return TypeMSI
+}
+
+func typeByFileExtension(filePath string) (Type, error) {
+	switch {
+	case strings.HasSuffix(strings.ToLower(filePath), ".exe"):
+		return TypeExe, nil
+	case strings.HasSuffix(strings.ToLower(filePath), ".msi"):
+		return TypeMSI, nil
+	default:
+		return Type{}, fmt.Errorf("unsupported installer type for file: %s", filePath)
+	}
+}

client/internal/updatemanager/manager.go

@@ -0,0 +1,374 @@
+//go:build windows || darwin
+
+package updatemanager
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"runtime"
+	"sync"
+	"time"
+
+	v "github.com/hashicorp/go-version"
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
+	"github.com/netbirdio/netbird/client/internal/statemanager"
+	"github.com/netbirdio/netbird/client/internal/updatemanager/installer"
+	cProto "github.com/netbirdio/netbird/client/proto"
+	"github.com/netbirdio/netbird/version"
+)
+
+const (
+	latestVersion = "latest"
+	// this version will be ignored
+	developmentVersion = "development"
+)
+
+var errNoUpdateState = errors.New("no update state found")
+
+type UpdateState struct {
+	PreUpdateVersion string
+	TargetVersion    string
+}
+
+func (u UpdateState) Name() string {
+	return "autoUpdate"
+}
+
+type Manager struct {
+	statusRecorder *peer.Status
+	stateManager   *statemanager.Manager
+
+	lastTrigger    time.Time
+	mgmUpdateChan  chan struct{}
+	updateChannel  chan struct{}
+	currentVersion string
+	update         UpdateInterface
+	wg             sync.WaitGroup
+
+	cancel context.CancelFunc
+
+	expectedVersion       *v.Version
+	updateToLatestVersion bool
+
+	// updateMutex protect update and expectedVersion fields
+	updateMutex sync.Mutex
+
+	triggerUpdateFn func(context.Context, string) error
+}
+
+func NewManager(statusRecorder *peer.Status, stateManager *statemanager.Manager) (*Manager, error) {
+	if runtime.GOOS == "darwin" {
+		isBrew := !installer.TypeOfInstaller(context.Background()).Downloadable()
+		if isBrew {
+			log.Warnf("auto-update disabled on Home Brew installation")
+			return nil, fmt.Errorf("auto-update not supported on Home Brew installation yet")
+		}
+	}
+	return newManager(statusRecorder, stateManager)
+}
+
+func newManager(statusRecorder *peer.Status, stateManager *statemanager.Manager) (*Manager, error) {
+	manager := &Manager{
+		statusRecorder: statusRecorder,
+		stateManager:   stateManager,
+		mgmUpdateChan:  make(chan struct{}, 1),
+		updateChannel:  make(chan struct{}, 1),
+		currentVersion: version.NetbirdVersion(),
+		update:         version.NewUpdate("nb/client"),
+	}
+	manager.triggerUpdateFn = manager.triggerUpdate
+
+	stateManager.RegisterState(&UpdateState{})
+
+	return manager, nil
+}
+
+// CheckUpdateSuccess checks if the update was successful and send a notification.
+// It works without to start the update manager.
+func (m *Manager) CheckUpdateSuccess(ctx context.Context) {
+	reason := m.lastResultErrReason()
+	if reason != "" {
+		m.statusRecorder.PublishEvent(
+			cProto.SystemEvent_ERROR,
+			cProto.SystemEvent_SYSTEM,
+			"Auto-update failed",
+			fmt.Sprintf("Auto-update failed: %s", reason),
+			nil,
+		)
+	}
+
+	updateState, err := m.loadAndDeleteUpdateState(ctx)
+	if err != nil {
+		if errors.Is(err, errNoUpdateState) {
+			return
+		}
+		log.Errorf("failed to load update state: %v", err)
+		return
+	}
+
+	log.Debugf("auto-update state loaded, %v", *updateState)
+
+	if updateState.TargetVersion == m.currentVersion {
+		m.statusRecorder.PublishEvent(
+			cProto.SystemEvent_INFO,
+			cProto.SystemEvent_SYSTEM,
+			"Auto-update completed",
+			fmt.Sprintf("Your NetBird Client was auto-updated to version %s", m.currentVersion),
+			nil,
+		)
+		return
+	}
+}
+
+func (m *Manager) Start(ctx context.Context) {
+	if m.cancel != nil {
+		log.Errorf("Manager already started")
+		return
+	}
+
+	m.update.SetDaemonVersion(m.currentVersion)
+	m.update.SetOnUpdateListener(func() {
+		select {
+		case m.updateChannel <- struct{}{}:
+		default:
+		}
+	})
+	go m.update.StartFetcher()
+
+	ctx, cancel := context.WithCancel(ctx)
+	m.cancel = cancel
+
+	m.wg.Add(1)
+	go m.updateLoop(ctx)
+}
+
+func (m *Manager) SetVersion(expectedVersion string) {
+	log.Infof("set expected agent version for upgrade: %s", expectedVersion)
+	if m.cancel == nil {
+		log.Errorf("manager not started")
+		return
+	}
+
+	m.updateMutex.Lock()
+	defer m.updateMutex.Unlock()
+
+	if expectedVersion == "" {
+		log.Errorf("empty expected version provided")
+		m.expectedVersion = nil
+		m.updateToLatestVersion = false
+		return
+	}
+
+	if expectedVersion == latestVersion {
+		m.updateToLatestVersion = true
+		m.expectedVersion = nil
+	} else {
+		expectedSemVer, err := v.NewVersion(expectedVersion)
+		if err != nil {
+			log.Errorf("error parsing version: %v", err)
+			return
+		}
+		if m.expectedVersion != nil && m.expectedVersion.Equal(expectedSemVer) {
+			return
+		}
+		m.expectedVersion = expectedSemVer
+		m.updateToLatestVersion = false
+	}
+
+	select {
+	case m.mgmUpdateChan <- struct{}{}:
+	default:
+	}
+}
+
+func (m *Manager) Stop() {
+	if m.cancel == nil {
+		return
+	}
+
+	m.cancel()
+	m.updateMutex.Lock()
+	if m.update != nil {
+		m.update.StopWatch()
+		m.update = nil
+	}
+	m.updateMutex.Unlock()
+
+	m.wg.Wait()
+}
+
+func (m *Manager) onContextCancel() {
+	if m.cancel == nil {
+		return
+	}
+
+	m.updateMutex.Lock()
+	defer m.updateMutex.Unlock()
+	if m.update != nil {
+		m.update.StopWatch()
+		m.update = nil
+	}
+}
+
+func (m *Manager) updateLoop(ctx context.Context) {
+	defer m.wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			m.onContextCancel()
+			return
+		case <-m.mgmUpdateChan:
+		case <-m.updateChannel:
+			log.Infof("fetched new version info")
+		}
+
+		m.handleUpdate(ctx)
+	}
+}
+
+func (m *Manager) handleUpdate(ctx context.Context) {
+	var updateVersion *v.Version
+
+	m.updateMutex.Lock()
+	if m.update == nil {
+		m.updateMutex.Unlock()
+		return
+	}
+
+	expectedVersion := m.expectedVersion
+	useLatest := m.updateToLatestVersion
+	curLatestVersion := m.update.LatestVersion()
+	m.updateMutex.Unlock()
+
+	switch {
+	// Resolve "latest" to actual version
+	case useLatest:
+		if curLatestVersion == nil {
+			log.Tracef("latest version not fetched yet")
+			return
+		}
+		updateVersion = curLatestVersion
+	// Update to specific version
+	case expectedVersion != nil:
+		updateVersion = expectedVersion
+	default:
+		log.Debugf("no expected version information set")
+		return
+	}
+
+	log.Debugf("checking update option, current version: %s, target version: %s", m.currentVersion, updateVersion)
+	if !m.shouldUpdate(updateVersion) {
+		return
+	}
+
+	m.lastTrigger = time.Now()
+	log.Infof("Auto-update triggered, current version: %s, target version: %s", m.currentVersion, updateVersion)
+	m.statusRecorder.PublishEvent(
+		cProto.SystemEvent_CRITICAL,
+		cProto.SystemEvent_SYSTEM,
+		"Automatically updating client",
+		"Your client version is older than auto-update version set in Management, updating client now.",
+		nil,
+	)
+
+	m.statusRecorder.PublishEvent(
+		cProto.SystemEvent_CRITICAL,
+		cProto.SystemEvent_SYSTEM,
+		"",
+		"",
+		map[string]string{"progress_window": "show", "version": updateVersion.String()},
+	)
+
+	updateState := UpdateState{
+		PreUpdateVersion: m.currentVersion,
+		TargetVersion:    updateVersion.String(),
+	}
+
+	if err := m.stateManager.UpdateState(updateState); err != nil {
+		log.Warnf("failed to update state: %v", err)
+	} else {
+		if err = m.stateManager.PersistState(ctx); err != nil {
+			log.Warnf("failed to persist state: %v", err)
+		}
+	}
+
+	if err := m.triggerUpdateFn(ctx, updateVersion.String()); err != nil {
+		log.Errorf("Error triggering auto-update: %v", err)
+		m.statusRecorder.PublishEvent(
+			cProto.SystemEvent_ERROR,
+			cProto.SystemEvent_SYSTEM,
+			"Auto-update failed",
+			fmt.Sprintf("Auto-update failed: %v", err),
+			nil,
+		)
+	}
+}
+
+// loadAndDeleteUpdateState loads the update state, deletes it from storage, and returns it.
+// Returns nil if no state exists.
+func (m *Manager) loadAndDeleteUpdateState(ctx context.Context) (*UpdateState, error) {
+	stateType := &UpdateState{}
+
+	m.stateManager.RegisterState(stateType)
+	if err := m.stateManager.LoadState(stateType); err != nil {
+		return nil, fmt.Errorf("load state: %w", err)
+	}
+
+	state := m.stateManager.GetState(stateType)
+	if state == nil {
+		return nil, errNoUpdateState
+	}
+
+	updateState, ok := state.(*UpdateState)
+	if !ok {
+		return nil, fmt.Errorf("failed to cast state to UpdateState")
+	}
+
+	if err := m.stateManager.DeleteState(updateState); err != nil {
+		return nil, fmt.Errorf("delete state: %w", err)
+	}
+
+	if err := m.stateManager.PersistState(ctx); err != nil {
+		return nil, fmt.Errorf("persist state: %w", err)
+	}
+
+	return updateState, nil
+}
+
+func (m *Manager) shouldUpdate(updateVersion *v.Version) bool {
+	if m.currentVersion == developmentVersion {
+		log.Debugf("skipping auto-update, running development version")
+		return false
+	}
+	currentVersion, err := v.NewVersion(m.currentVersion)
+	if err != nil {
+		log.Errorf("error checking for update, error parsing version `%s`: %v", m.currentVersion, err)
+		return false
+	}
+	if currentVersion.GreaterThanOrEqual(updateVersion) {
+		log.Infof("current version (%s) is equal to or higher than auto-update version (%s)", m.currentVersion, updateVersion)
+		return false
+	}
+
+	if time.Since(m.lastTrigger) < 5*time.Minute {
+		log.Debugf("skipping auto-update, last update was %s ago", time.Since(m.lastTrigger))
+		return false
+	}
+
+	return true
+}
+
+func (m *Manager) lastResultErrReason() string {
+	inst := installer.New()
+	result := installer.NewResultHandler(inst.TempDir())
+	return result.GetErrorResultReason()
+}
+
+func (m *Manager) triggerUpdate(ctx context.Context, targetVersion string) error {
+	inst := installer.New()
+	return inst.RunInstallation(ctx, targetVersion)
+}

client/internal/updatemanager/manager_test.go

@@ -0,0 +1,214 @@
+//go:build windows || darwin
+
+package updatemanager
+
+import (
+	"context"
+	"fmt"
+	"path"
+	"testing"
+	"time"
+
+	v "github.com/hashicorp/go-version"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
+	"github.com/netbirdio/netbird/client/internal/statemanager"
+)
+
+type versionUpdateMock struct {
+	latestVersion *v.Version
+	onUpdate      func()
+}
+
+func (v versionUpdateMock) StopWatch() {}
+
+func (v versionUpdateMock) SetDaemonVersion(newVersion string) bool {
+	return false
+}
+
+func (v *versionUpdateMock) SetOnUpdateListener(updateFn func()) {
+	v.onUpdate = updateFn
+}
+
+func (v versionUpdateMock) LatestVersion() *v.Version {
+	return v.latestVersion
+}
+
+func (v versionUpdateMock) StartFetcher() {}
+
+func Test_LatestVersion(t *testing.T) {
+	testMatrix := []struct {
+		name                 string
+		daemonVersion        string
+		initialLatestVersion *v.Version
+		latestVersion        *v.Version
+		shouldUpdateInit     bool
+		shouldUpdateLater    bool
+	}{
+		{
+			name:                 "Should only trigger update once due to time between triggers being < 5 Minutes",
+			daemonVersion:        "1.0.0",
+			initialLatestVersion: v.Must(v.NewSemver("1.0.1")),
+			latestVersion:        v.Must(v.NewSemver("1.0.2")),
+			shouldUpdateInit:     true,
+			shouldUpdateLater:    false,
+		},
+		{
+			name:                 "Shouldn't update initially, but should update as soon as latest version is fetched",
+			daemonVersion:        "1.0.0",
+			initialLatestVersion: nil,
+			latestVersion:        v.Must(v.NewSemver("1.0.1")),
+			shouldUpdateInit:     false,
+			shouldUpdateLater:    true,
+		},
+	}
+
+	for idx, c := range testMatrix {
+		mockUpdate := &versionUpdateMock{latestVersion: c.initialLatestVersion}
+		tmpFile := path.Join(t.TempDir(), fmt.Sprintf("update-test-%d.json", idx))
+		m, _ := newManager(peer.NewRecorder(""), statemanager.New(tmpFile))
+		m.update = mockUpdate
+
+		targetVersionChan := make(chan string, 1)
+
+		m.triggerUpdateFn = func(ctx context.Context, targetVersion string) error {
+			targetVersionChan <- targetVersion
+			return nil
+		}
+		m.currentVersion = c.daemonVersion
+		m.Start(context.Background())
+		m.SetVersion("latest")
+		var triggeredInit bool
+		select {
+		case targetVersion := <-targetVersionChan:
+			if targetVersion != c.initialLatestVersion.String() {
+				t.Errorf("%s: Initial update version mismatch, expected %v, got %v", c.name, c.initialLatestVersion.String(), targetVersion)
+			}
+			triggeredInit = true
+		case <-time.After(10 * time.Millisecond):
+			triggeredInit = false
+		}
+		if triggeredInit != c.shouldUpdateInit {
+			t.Errorf("%s: Initial update trigger mismatch, expected %v, got %v", c.name, c.shouldUpdateInit, triggeredInit)
+		}
+
+		mockUpdate.latestVersion = c.latestVersion
+		mockUpdate.onUpdate()
+
+		var triggeredLater bool
+		select {
+		case targetVersion := <-targetVersionChan:
+			if targetVersion != c.latestVersion.String() {
+				t.Errorf("%s: Update version mismatch, expected %v, got %v", c.name, c.latestVersion.String(), targetVersion)
+			}
+			triggeredLater = true
+		case <-time.After(10 * time.Millisecond):
+			triggeredLater = false
+		}
+		if triggeredLater != c.shouldUpdateLater {
+			t.Errorf("%s: Update trigger mismatch, expected %v, got %v", c.name, c.shouldUpdateLater, triggeredLater)
+		}
+
+		m.Stop()
+	}
+}
+
+func Test_HandleUpdate(t *testing.T) {
+	testMatrix := []struct {
+		name            string
+		daemonVersion   string
+		latestVersion   *v.Version
+		expectedVersion string
+		shouldUpdate    bool
+	}{
+		{
+			name:            "Update to a specific version should update regardless of if latestVersion is available yet",
+			daemonVersion:   "0.55.0",
+			latestVersion:   nil,
+			expectedVersion: "0.56.0",
+			shouldUpdate:    true,
+		},
+		{
+			name:            "Update to specific version should not update if version matches",
+			daemonVersion:   "0.55.0",
+			latestVersion:   nil,
+			expectedVersion: "0.55.0",
+			shouldUpdate:    false,
+		},
+		{
+			name:            "Update to specific version should not update if current version is newer",
+			daemonVersion:   "0.55.0",
+			latestVersion:   nil,
+			expectedVersion: "0.54.0",
+			shouldUpdate:    false,
+		},
+		{
+			name:            "Update to latest version should update if latest is newer",
+			daemonVersion:   "0.55.0",
+			latestVersion:   v.Must(v.NewSemver("0.56.0")),
+			expectedVersion: "latest",
+			shouldUpdate:    true,
+		},
+		{
+			name:            "Update to latest version should not update if latest == current",
+			daemonVersion:   "0.56.0",
+			latestVersion:   v.Must(v.NewSemver("0.56.0")),
+			expectedVersion: "latest",
+			shouldUpdate:    false,
+		},
+		{
+			name:            "Should not update if daemon version is invalid",
+			daemonVersion:   "development",
+			latestVersion:   v.Must(v.NewSemver("1.0.0")),
+			expectedVersion: "latest",
+			shouldUpdate:    false,
+		},
+		{
+			name:            "Should not update if expecting latest and latest version is unavailable",
+			daemonVersion:   "0.55.0",
+			latestVersion:   nil,
+			expectedVersion: "latest",
+			shouldUpdate:    false,
+		},
+		{
+			name:            "Should not update if expected version is invalid",
+			daemonVersion:   "0.55.0",
+			latestVersion:   nil,
+			expectedVersion: "development",
+			shouldUpdate:    false,
+		},
+	}
+	for idx, c := range testMatrix {
+		tmpFile := path.Join(t.TempDir(), fmt.Sprintf("update-test-%d.json", idx))
+		m, _ := newManager(peer.NewRecorder(""), statemanager.New(tmpFile))
+		m.update = &versionUpdateMock{latestVersion: c.latestVersion}
+		targetVersionChan := make(chan string, 1)
+
+		m.triggerUpdateFn = func(ctx context.Context, targetVersion string) error {
+			targetVersionChan <- targetVersion
+			return nil
+		}
+
+		m.currentVersion = c.daemonVersion
+		m.Start(context.Background())
+		m.SetVersion(c.expectedVersion)
+
+		var updateTriggered bool
+		select {
+		case targetVersion := <-targetVersionChan:
+			if c.expectedVersion == "latest" && targetVersion != c.latestVersion.String() {
+				t.Errorf("%s: Update version mismatch, expected %v, got %v", c.name, c.latestVersion.String(), targetVersion)
+			} else if c.expectedVersion != "latest" && targetVersion != c.expectedVersion {
+				t.Errorf("%s: Update version mismatch, expected %v, got %v", c.name, c.expectedVersion, targetVersion)
+			}
+			updateTriggered = true
+		case <-time.After(10 * time.Millisecond):
+			updateTriggered = false
+		}
+
+		if updateTriggered != c.shouldUpdate {
+			t.Errorf("%s: Update trigger mismatch, expected %v, got %v", c.name, c.shouldUpdate, updateTriggered)
+		}
+		m.Stop()
+	}
+}

client/internal/updatemanager/manager_unsupported.go

@@ -0,0 +1,39 @@
+//go:build !windows && !darwin
+
+package updatemanager
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
+	"github.com/netbirdio/netbird/client/internal/statemanager"
+)
+
+// Manager is a no-op stub for unsupported platforms
+type Manager struct{}
+
+// NewManager returns a no-op manager for unsupported platforms
+func NewManager(statusRecorder *peer.Status, stateManager *statemanager.Manager) (*Manager, error) {
+	return nil, fmt.Errorf("update manager is not supported on this platform")
+}
+
+// CheckUpdateSuccess is a no-op on unsupported platforms
+func (m *Manager) CheckUpdateSuccess(ctx context.Context) {
+	// no-op
+}
+
+// Start is a no-op on unsupported platforms
+func (m *Manager) Start(ctx context.Context) {
+	// no-op
+}
+
+// SetVersion is a no-op on unsupported platforms
+func (m *Manager) SetVersion(expectedVersion string) {
+	// no-op
+}
+
+// Stop is a no-op on unsupported platforms
+func (m *Manager) Stop() {
+	// no-op
+}

client/internal/updatemanager/reposign/artifact.go

@@ -0,0 +1,302 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/binary"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"hash"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/crypto/blake2s"
+)
+
+const (
+	tagArtifactPrivate = "ARTIFACT PRIVATE KEY"
+	tagArtifactPublic  = "ARTIFACT PUBLIC KEY"
+
+	maxArtifactKeySignatureAge = 10 * 365 * 24 * time.Hour
+	maxArtifactSignatureAge    = 10 * 365 * 24 * time.Hour
+)
+
+// ArtifactHash wraps a hash.Hash and counts bytes written
+type ArtifactHash struct {
+	hash.Hash
+}
+
+// NewArtifactHash returns an initialized ArtifactHash using BLAKE2s
+func NewArtifactHash() *ArtifactHash {
+	h, err := blake2s.New256(nil)
+	if err != nil {
+		panic(err) // Should never happen with nil Key
+	}
+	return &ArtifactHash{Hash: h}
+}
+
+func (ah *ArtifactHash) Write(b []byte) (int, error) {
+	return ah.Hash.Write(b)
+}
+
+// ArtifactKey is a signing Key used to sign artifacts
+type ArtifactKey struct {
+	PrivateKey
+}
+
+func (k ArtifactKey) String() string {
+	return fmt.Sprintf(
+		"ArtifactKey[ID=%s, CreatedAt=%s, ExpiresAt=%s]",
+		k.Metadata.ID,
+		k.Metadata.CreatedAt.Format(time.RFC3339),
+		k.Metadata.ExpiresAt.Format(time.RFC3339),
+	)
+}
+
+func GenerateArtifactKey(rootKey *RootKey, expiration time.Duration) (*ArtifactKey, []byte, []byte, []byte, error) {
+	// Verify root key is still valid
+	if !rootKey.Metadata.ExpiresAt.IsZero() && time.Now().After(rootKey.Metadata.ExpiresAt) {
+		return nil, nil, nil, nil, fmt.Errorf("root key has expired on %s", rootKey.Metadata.ExpiresAt.Format(time.RFC3339))
+	}
+
+	now := time.Now()
+	expirationTime := now.Add(expiration)
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, nil, nil, nil, fmt.Errorf("generate ed25519 key: %w", err)
+	}
+
+	metadata := KeyMetadata{
+		ID:        computeKeyID(pub),
+		CreatedAt: now.UTC(),
+		ExpiresAt: expirationTime.UTC(),
+	}
+
+	ak := &ArtifactKey{
+		PrivateKey{
+			Key:      priv,
+			Metadata: metadata,
+		},
+	}
+
+	// Marshal PrivateKey struct to JSON
+	privJSON, err := json.Marshal(ak.PrivateKey)
+	if err != nil {
+		return nil, nil, nil, nil, fmt.Errorf("failed to marshal private key: %w", err)
+	}
+
+	// Marshal PublicKey struct to JSON
+	pubKey := PublicKey{
+		Key:      pub,
+		Metadata: metadata,
+	}
+	pubJSON, err := json.Marshal(pubKey)
+	if err != nil {
+		return nil, nil, nil, nil, fmt.Errorf("failed to marshal public key: %w", err)
+	}
+
+	// Encode to PEM with metadata embedded in bytes
+	privPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  tagArtifactPrivate,
+		Bytes: privJSON,
+	})
+
+	pubPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  tagArtifactPublic,
+		Bytes: pubJSON,
+	})
+
+	// Sign the public key with the root key
+	signature, err := SignArtifactKey(*rootKey, pubPEM)
+	if err != nil {
+		return nil, nil, nil, nil, fmt.Errorf("failed to sign artifact key: %w", err)
+	}
+
+	return ak, privPEM, pubPEM, signature, nil
+}
+
+func ParseArtifactKey(privKeyPEM []byte) (ArtifactKey, error) {
+	pk, err := parsePrivateKey(privKeyPEM, tagArtifactPrivate)
+	if err != nil {
+		return ArtifactKey{}, fmt.Errorf("failed to parse artifact Key: %w", err)
+	}
+	return ArtifactKey{pk}, nil
+}
+
+func ParseArtifactPubKey(data []byte) (PublicKey, error) {
+	pk, _, err := parsePublicKey(data, tagArtifactPublic)
+	return pk, err
+}
+
+func BundleArtifactKeys(rootKey *RootKey, keys []PublicKey) ([]byte, []byte, error) {
+	if len(keys) == 0 {
+		return nil, nil, errors.New("no keys to bundle")
+	}
+
+	// Create bundle by concatenating PEM-encoded keys
+	var pubBundle []byte
+
+	for _, pk := range keys {
+		// Marshal PublicKey struct to JSON
+		pubJSON, err := json.Marshal(pk)
+		if err != nil {
+			return nil, nil, fmt.Errorf("failed to marshal public key: %w", err)
+		}
+
+		// Encode to PEM
+		pubPEM := pem.EncodeToMemory(&pem.Block{
+			Type:  tagArtifactPublic,
+			Bytes: pubJSON,
+		})
+
+		pubBundle = append(pubBundle, pubPEM...)
+	}
+
+	// Sign the entire bundle with the root key
+	signature, err := SignArtifactKey(*rootKey, pubBundle)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to sign artifact key bundle: %w", err)
+	}
+
+	return pubBundle, signature, nil
+}
+
+func ValidateArtifactKeys(publicRootKeys []PublicKey, data []byte, signature Signature, revocationList *RevocationList) ([]PublicKey, error) {
+	now := time.Now().UTC()
+	if signature.Timestamp.After(now.Add(maxClockSkew)) {
+		err := fmt.Errorf("signature timestamp is in the future: %v", signature.Timestamp)
+		log.Debugf("artifact signature error: %v", err)
+		return nil, err
+	}
+	if now.Sub(signature.Timestamp) > maxArtifactKeySignatureAge {
+		err := fmt.Errorf("signature is too old: %v (created %v)", now.Sub(signature.Timestamp), signature.Timestamp)
+		log.Debugf("artifact signature error: %v", err)
+		return nil, err
+	}
+
+	// Reconstruct the signed message: artifact_key_data || timestamp
+	msg := make([]byte, 0, len(data)+8)
+	msg = append(msg, data...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(signature.Timestamp.Unix()))
+
+	if !verifyAny(publicRootKeys, msg, signature.Signature) {
+		return nil, errors.New("failed to verify signature of artifact keys")
+	}
+
+	pubKeys, err := parsePublicKeyBundle(data, tagArtifactPublic)
+	if err != nil {
+		log.Debugf("failed to parse public keys: %s", err)
+		return nil, err
+	}
+
+	validKeys := make([]PublicKey, 0, len(pubKeys))
+	for _, pubKey := range pubKeys {
+		// Filter out expired keys
+		if !pubKey.Metadata.ExpiresAt.IsZero() && now.After(pubKey.Metadata.ExpiresAt) {
+			log.Debugf("Key %s is expired at %v (current time %v)",
+				pubKey.Metadata.ID, pubKey.Metadata.ExpiresAt, now)
+			continue
+		}
+
+		if revocationList != nil {
+			if revTime, revoked := revocationList.Revoked[pubKey.Metadata.ID]; revoked {
+				log.Debugf("Key %s is revoked as of %v (created %v)",
+					pubKey.Metadata.ID, revTime, pubKey.Metadata.CreatedAt)
+				continue
+			}
+		}
+		validKeys = append(validKeys, pubKey)
+	}
+
+	if len(validKeys) == 0 {
+		log.Debugf("no valid public keys found for artifact keys")
+		return nil, fmt.Errorf("all %d artifact keys are revoked", len(pubKeys))
+	}
+
+	return validKeys, nil
+}
+
+func ValidateArtifact(artifactPubKeys []PublicKey, data []byte, signature Signature) error {
+	// Validate signature timestamp
+	now := time.Now().UTC()
+	if signature.Timestamp.After(now.Add(maxClockSkew)) {
+		err := fmt.Errorf("artifact signature timestamp is in the future: %v", signature.Timestamp)
+		log.Debugf("failed to verify signature of artifact: %s", err)
+		return err
+	}
+	if now.Sub(signature.Timestamp) > maxArtifactSignatureAge {
+		return fmt.Errorf("artifact signature is too old: %v (created %v)",
+			now.Sub(signature.Timestamp), signature.Timestamp)
+	}
+
+	h := NewArtifactHash()
+	if _, err := h.Write(data); err != nil {
+		return fmt.Errorf("failed to hash artifact: %w", err)
+	}
+	hash := h.Sum(nil)
+
+	// Reconstruct the signed message: hash || length || timestamp
+	msg := make([]byte, 0, len(hash)+8+8)
+	msg = append(msg, hash...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(len(data)))
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(signature.Timestamp.Unix()))
+
+	// Find matching Key and verify
+	for _, keyInfo := range artifactPubKeys {
+		if keyInfo.Metadata.ID == signature.KeyID {
+			// Check Key expiration
+			if !keyInfo.Metadata.ExpiresAt.IsZero() &&
+				signature.Timestamp.After(keyInfo.Metadata.ExpiresAt) {
+				return fmt.Errorf("signing Key %s expired at %v, signature from %v",
+					signature.KeyID, keyInfo.Metadata.ExpiresAt, signature.Timestamp)
+			}
+
+			if ed25519.Verify(keyInfo.Key, msg, signature.Signature) {
+				log.Debugf("artifact verified successfully with Key: %s", signature.KeyID)
+				return nil
+			}
+			return fmt.Errorf("signature verification failed for Key %s", signature.KeyID)
+		}
+	}
+
+	return fmt.Errorf("no signing Key found with ID %s", signature.KeyID)
+}
+
+func SignData(artifactKey ArtifactKey, data []byte) ([]byte, error) {
+	if len(data) == 0 { // Check happens too late
+		return nil, fmt.Errorf("artifact length must be positive, got %d", len(data))
+	}
+
+	h := NewArtifactHash()
+	if _, err := h.Write(data); err != nil {
+		return nil, fmt.Errorf("failed to write artifact hash: %w", err)
+	}
+
+	timestamp := time.Now().UTC()
+
+	if !artifactKey.Metadata.ExpiresAt.IsZero() && timestamp.After(artifactKey.Metadata.ExpiresAt) {
+		return nil, fmt.Errorf("artifact key expired at %v", artifactKey.Metadata.ExpiresAt)
+	}
+
+	hash := h.Sum(nil)
+
+	// Create message: hash || length || timestamp
+	msg := make([]byte, 0, len(hash)+8+8)
+	msg = append(msg, hash...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(len(data)))
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(timestamp.Unix()))
+
+	sig := ed25519.Sign(artifactKey.Key, msg)
+
+	bundle := Signature{
+		Signature: sig,
+		Timestamp: timestamp,
+		KeyID:     artifactKey.Metadata.ID,
+		Algorithm: "ed25519",
+		HashAlgo:  "blake2s",
+	}
+
+	return json.Marshal(bundle)
+}

client/internal/updatemanager/reposign/certs/root-pub.pem

@@ -0,0 +1,6 @@
+-----BEGIN ROOT PUBLIC KEY-----
+eyJLZXkiOiJoaGIxdGRDSEZNMFBuQWp1b2w2cXJ1QXRFbWFFSlg1QjFsZUNxWmpn
+V1pvPSIsIk1ldGFkYXRhIjp7ImlkIjoiOWE0OTg2NmI2MzE2MjNiNCIsImNyZWF0
+ZWRfYXQiOiIyMDI1LTExLTI0VDE3OjE1OjI4LjYyNzE3MzE3MVoiLCJleHBpcmVz
+X2F0IjoiMjAzNS0xMS0yMlQxNzoxNToyOC42MjcxNzMxNzFaIn19
+-----END ROOT PUBLIC KEY-----

client/internal/updatemanager/reposign/certsdev/root-pub.pem

@@ -0,0 +1,6 @@
+-----BEGIN ROOT PUBLIC KEY-----
+eyJLZXkiOiJyTDByVTN2MEFOZUNmbDZraitiUUd3TE1waU5CaUJLdVBWSnZtQzgr
+ZS84PSIsIk1ldGFkYXRhIjp7ImlkIjoiMTBkNjQyZTY2N2FmMDNkNCIsImNyZWF0
+ZWRfYXQiOiIyMDI1LTExLTIwVDE3OjI5OjI5LjE4MDk0NjMxNloiLCJleHBpcmVz
+X2F0IjoiMjAyNi0xMS0yMFQxNzoyOToyOS4xODA5NDYzMTZaIn19
+-----END ROOT PUBLIC KEY-----

client/internal/updatemanager/reposign/doc.go

@@ -0,0 +1,174 @@
+// Package reposign implements a cryptographic signing and verification system
+// for NetBird software update artifacts. It provides a hierarchical key
+// management system with support for key rotation, revocation, and secure
+// artifact distribution.
+//
+// # Architecture
+//
+// The package uses a two-tier key hierarchy:
+//
+//   - Root Keys: Long-lived keys that sign artifact keys. These are embedded
+//     in the client binary and establish the root of trust. Root keys should
+//     be kept offline and highly secured.
+//
+//   - Artifact Keys: Short-lived keys that sign release artifacts (binaries,
+//     packages, etc.). These are rotated regularly and can be revoked if
+//     compromised. Artifact keys are signed by root keys and distributed via
+//     a public repository.
+//
+// This separation allows for operational flexibility: artifact keys can be
+// rotated frequently without requiring client updates, while root keys remain
+// stable and embedded in the software.
+//
+// # Cryptographic Primitives
+//
+// The package uses strong, modern cryptographic algorithms:
+//   - Ed25519: Fast, secure digital signatures (no timing attacks)
+//   - BLAKE2s-256: Fast cryptographic hash for artifacts
+//   - SHA-256: Key ID generation
+//   - JSON: Structured key and signature serialization
+//   - PEM: Standard key encoding format
+//
+// # Security Features
+//
+// Timestamp Binding:
+//   - All signatures include cryptographically-bound timestamps
+//   - Prevents replay attacks and enforces signature freshness
+//   - Clock skew tolerance: 5 minutes
+//
+// Key Expiration:
+//   - All keys have expiration times
+//   - Expired keys are automatically rejected
+//   - Signing with an expired key fails immediately
+//
+// Key Revocation:
+//   - Compromised keys can be revoked via a signed revocation list
+//   - Revocation list is checked during artifact validation
+//   - Revoked keys are filtered out before artifact verification
+//
+// # File Structure
+//
+// The package expects the following file layout in the key repository:
+//
+//	signrepo/
+//	  artifact-key-pub.pem      # Bundle of artifact public keys
+//	  artifact-key-pub.pem.sig  # Root signature of the bundle
+//	  revocation-list.json      # List of revoked key IDs
+//	  revocation-list.json.sig  # Root signature of revocation list
+//
+// And in the artifacts repository:
+//
+//	releases/
+//	  v0.28.0/
+//	    netbird-linux-amd64
+//	    netbird-linux-amd64.sig   # Artifact signature
+//	    netbird-darwin-amd64
+//	    netbird-darwin-amd64.sig
+//	    ...
+//
+// # Embedded Root Keys
+//
+// Root public keys are embedded in the client binary at compile time:
+//   - Production keys: certs/ directory
+//   - Development keys: certsdev/ directory
+//
+// The build tag determines which keys are embedded:
+//   - Production builds: //go:build !devartifactsign
+//   - Development builds: //go:build devartifactsign
+//
+// This ensures that development artifacts cannot be verified using production
+// keys and vice versa.
+//
+// # Key Rotation Strategies
+//
+// Root Key Rotation:
+//
+// Root keys can be rotated without breaking existing clients by leveraging
+// the multi-key verification system. The loadEmbeddedPublicKeys function
+// reads ALL files from the certs/ directory and accepts signatures from ANY
+// of the embedded root keys.
+//
+// To rotate root keys:
+//
+//  1. Generate a new root key pair:
+//     newRootKey, privPEM, pubPEM, err := GenerateRootKey(10 * 365 * 24 * time.Hour)
+//
+//  2. Add the new public key to the certs/ directory as a new file:
+//     certs/
+//     root-pub-2024.pem    # Old key (keep this!)
+//     root-pub-2025.pem    # New key (add this)
+//
+//  3. Build new client versions with both keys embedded. The verification
+//     will accept signatures from either key.
+//
+//  4. Start signing new artifact keys with the new root key. Old clients
+//     with only the old root key will reject these, but new clients with
+//     both keys will accept them.
+//
+// Each file in certs/ can contain a single key or a bundle of keys (multiple
+// PEM blocks). The system will parse all keys from all files and use them
+// for verification. This provides maximum flexibility for key management.
+//
+// Important: Never remove all old root keys at once. Always maintain at least
+// one overlapping key between releases to ensure smooth transitions.
+//
+// Artifact Key Rotation:
+//
+// Artifact keys should be rotated regularly (e.g., every 90 days) using the
+// bundling mechanism. The BundleArtifactKeys function allows multiple artifact
+// keys to be bundled together in a single signed package, and ValidateArtifact
+// will accept signatures from ANY key in the bundle.
+//
+// To rotate artifact keys smoothly:
+//
+//  1. Generate a new artifact key while keeping the old one:
+//     newKey, newPrivPEM, newPubPEM, newSig, err := GenerateArtifactKey(rootKey, 90 * 24 * time.Hour)
+//     // Keep oldPubPEM and oldKey available
+//
+//  2. Create a bundle containing both old and new public keys
+//
+//  3. Upload the bundle and its signature to the key repository:
+//     signrepo/artifact-key-pub.pem      # Contains both keys
+//     signrepo/artifact-key-pub.pem.sig  # Root signature
+//
+//  4. Start signing new releases with the NEW key, but keep the bundle
+//     unchanged. Clients will download the bundle (containing both keys)
+//     and accept signatures from either key.
+//
+// Key bundle validation workflow:
+//  1. Client downloads artifact-key-pub.pem and artifact-key-pub.pem.sig
+//  2. ValidateArtifactKeys verifies the bundle signature with ANY embedded root key
+//  3. ValidateArtifactKeys parses all public keys from the bundle
+//  4. ValidateArtifactKeys filters out expired or revoked keys
+//  5. When verifying an artifact, ValidateArtifact tries each key until one succeeds
+//
+// This multi-key acceptance model enables overlapping validity periods and
+// smooth transitions without client update requirements.
+//
+// # Best Practices
+//
+// Root Key Management:
+//   - Generate root keys offline on an air-gapped machine
+//   - Store root private keys in hardware security modules (HSM) if possible
+//   - Use separate root keys for production and development
+//   - Rotate root keys infrequently (e.g., every 5-10 years)
+//   - Plan for root key rotation: embed multiple root public keys
+//
+// Artifact Key Management:
+//   - Rotate artifact keys regularly (e.g., every 90 days)
+//   - Use separate artifact keys for different release channels if needed
+//   - Revoke keys immediately upon suspected compromise
+//   - Bundle multiple artifact keys to enable smooth rotation
+//
+// Signing Process:
+//   - Sign artifacts in a secure CI/CD environment
+//   - Never commit private keys to version control
+//   - Use environment variables or secret management for keys
+//   - Verify signatures immediately after signing
+//
+// Distribution:
+//   - Serve keys and revocation lists from a reliable CDN
+//   - Use HTTPS for all key and artifact downloads
+//   - Monitor download failures and signature verification failures
+//   - Keep revocation list up to date
+package reposign

client/internal/updatemanager/reposign/embed_dev.go

@@ -0,0 +1,10 @@
+//go:build devartifactsign
+
+package reposign
+
+import "embed"
+
+//go:embed certsdev
+var embeddedCerts embed.FS
+
+const embeddedCertsDir = "certsdev"

client/internal/updatemanager/reposign/embed_prod.go

@@ -0,0 +1,10 @@
+//go:build !devartifactsign
+
+package reposign
+
+import "embed"
+
+//go:embed certs
+var embeddedCerts embed.FS
+
+const embeddedCertsDir = "certs"

client/internal/updatemanager/reposign/key.go

@@ -0,0 +1,171 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"time"
+)
+
+const (
+	maxClockSkew = 5 * time.Minute
+)
+
+// KeyID is a unique identifier for a Key (first 8 bytes of SHA-256 of public Key)
+type KeyID [8]byte
+
+// computeKeyID generates a unique ID from a public Key
+func computeKeyID(pub ed25519.PublicKey) KeyID {
+	h := sha256.Sum256(pub)
+	var id KeyID
+	copy(id[:], h[:8])
+	return id
+}
+
+// MarshalJSON implements json.Marshaler for KeyID
+func (k KeyID) MarshalJSON() ([]byte, error) {
+	return json.Marshal(k.String())
+}
+
+// UnmarshalJSON implements json.Unmarshaler for KeyID
+func (k *KeyID) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+
+	parsed, err := ParseKeyID(s)
+	if err != nil {
+		return err
+	}
+
+	*k = parsed
+	return nil
+}
+
+// ParseKeyID parses a hex string (16 hex chars = 8 bytes) into a KeyID.
+func ParseKeyID(s string) (KeyID, error) {
+	var id KeyID
+	if len(s) != 16 {
+		return id, fmt.Errorf("invalid KeyID length: got %d, want 16 hex chars (8 bytes)", len(s))
+	}
+
+	b, err := hex.DecodeString(s)
+	if err != nil {
+		return id, fmt.Errorf("failed to decode KeyID: %w", err)
+	}
+
+	copy(id[:], b)
+	return id, nil
+}
+
+func (k KeyID) String() string {
+	return fmt.Sprintf("%x", k[:])
+}
+
+// KeyMetadata contains versioning and lifecycle information for a Key
+type KeyMetadata struct {
+	ID        KeyID     `json:"id"`
+	CreatedAt time.Time `json:"created_at"`
+	ExpiresAt time.Time `json:"expires_at,omitempty"` // Optional expiration
+}
+
+// PublicKey wraps a public Key with its Metadata
+type PublicKey struct {
+	Key      ed25519.PublicKey
+	Metadata KeyMetadata
+}
+
+func parsePublicKeyBundle(bundle []byte, typeTag string) ([]PublicKey, error) {
+	var keys []PublicKey
+	for len(bundle) > 0 {
+		keyInfo, rest, err := parsePublicKey(bundle, typeTag)
+		if err != nil {
+			return nil, err
+		}
+		keys = append(keys, keyInfo)
+		bundle = rest
+	}
+	if len(keys) == 0 {
+		return nil, errors.New("no keys found in bundle")
+	}
+	return keys, nil
+}
+
+func parsePublicKey(data []byte, typeTag string) (PublicKey, []byte, error) {
+	b, rest := pem.Decode(data)
+	if b == nil {
+		return PublicKey{}, nil, errors.New("failed to decode PEM data")
+	}
+	if b.Type != typeTag {
+		return PublicKey{}, nil, fmt.Errorf("PEM type is %q, want %q", b.Type, typeTag)
+	}
+
+	// Unmarshal JSON-embedded format
+	var pub PublicKey
+	if err := json.Unmarshal(b.Bytes, &pub); err != nil {
+		return PublicKey{}, nil, fmt.Errorf("failed to unmarshal public key: %w", err)
+	}
+
+	// Validate key length
+	if len(pub.Key) != ed25519.PublicKeySize {
+		return PublicKey{}, nil, fmt.Errorf("incorrect Ed25519 public key size: expected %d, got %d",
+			ed25519.PublicKeySize, len(pub.Key))
+	}
+
+	// Always recompute ID to ensure integrity
+	pub.Metadata.ID = computeKeyID(pub.Key)
+
+	return pub, rest, nil
+}
+
+type PrivateKey struct {
+	Key      ed25519.PrivateKey
+	Metadata KeyMetadata
+}
+
+func parsePrivateKey(data []byte, typeTag string) (PrivateKey, error) {
+	b, rest := pem.Decode(data)
+	if b == nil {
+		return PrivateKey{}, errors.New("failed to decode PEM data")
+	}
+	if len(rest) > 0 {
+		return PrivateKey{}, errors.New("trailing PEM data")
+	}
+	if b.Type != typeTag {
+		return PrivateKey{}, fmt.Errorf("PEM type is %q, want %q", b.Type, typeTag)
+	}
+
+	// Unmarshal JSON-embedded format
+	var pk PrivateKey
+	if err := json.Unmarshal(b.Bytes, &pk); err != nil {
+		return PrivateKey{}, fmt.Errorf("failed to unmarshal private key: %w", err)
+	}
+
+	// Validate key length
+	if len(pk.Key) != ed25519.PrivateKeySize {
+		return PrivateKey{}, fmt.Errorf("incorrect Ed25519 private key size: expected %d, got %d",
+			ed25519.PrivateKeySize, len(pk.Key))
+	}
+
+	return pk, nil
+}
+
+func verifyAny(publicRootKeys []PublicKey, msg, sig []byte) bool {
+	// Verify with root keys
+	var rootKeys []ed25519.PublicKey
+	for _, r := range publicRootKeys {
+		rootKeys = append(rootKeys, r.Key)
+	}
+
+	for _, k := range rootKeys {
+		if ed25519.Verify(k, msg, sig) {
+			return true
+		}
+	}
+	return false
+}

client/internal/updatemanager/reposign/key_test.go

@@ -0,0 +1,636 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/json"
+	"encoding/pem"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Test KeyID functions
+
+func TestComputeKeyID(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	keyID := computeKeyID(pub)
+
+	// Verify it's the first 8 bytes of SHA-256
+	h := sha256.Sum256(pub)
+	expectedID := KeyID{}
+	copy(expectedID[:], h[:8])
+
+	assert.Equal(t, expectedID, keyID)
+}
+
+func TestComputeKeyID_Deterministic(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	// Computing KeyID multiple times should give the same result
+	keyID1 := computeKeyID(pub)
+	keyID2 := computeKeyID(pub)
+
+	assert.Equal(t, keyID1, keyID2)
+}
+
+func TestComputeKeyID_DifferentKeys(t *testing.T) {
+	pub1, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pub2, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	keyID1 := computeKeyID(pub1)
+	keyID2 := computeKeyID(pub2)
+
+	// Different keys should produce different IDs
+	assert.NotEqual(t, keyID1, keyID2)
+}
+
+func TestParseKeyID_Valid(t *testing.T) {
+	hexStr := "0123456789abcdef"
+
+	keyID, err := ParseKeyID(hexStr)
+	require.NoError(t, err)
+
+	expected := KeyID{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}
+	assert.Equal(t, expected, keyID)
+}
+
+func TestParseKeyID_InvalidLength(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+	}{
+		{"too short", "01234567"},
+		{"too long", "0123456789abcdef00"},
+		{"empty", ""},
+		{"odd length", "0123456789abcde"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := ParseKeyID(tt.input)
+			assert.Error(t, err)
+			assert.Contains(t, err.Error(), "invalid KeyID length")
+		})
+	}
+}
+
+func TestParseKeyID_InvalidHex(t *testing.T) {
+	invalidHex := "0123456789abcxyz" // 'xyz' are not valid hex
+
+	_, err := ParseKeyID(invalidHex)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to decode KeyID")
+}
+
+func TestKeyID_String(t *testing.T) {
+	keyID := KeyID{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}
+
+	str := keyID.String()
+	assert.Equal(t, "0123456789abcdef", str)
+}
+
+func TestKeyID_RoundTrip(t *testing.T) {
+	original := "fedcba9876543210"
+
+	keyID, err := ParseKeyID(original)
+	require.NoError(t, err)
+
+	result := keyID.String()
+	assert.Equal(t, original, result)
+}
+
+func TestKeyID_ZeroValue(t *testing.T) {
+	keyID := KeyID{}
+	str := keyID.String()
+	assert.Equal(t, "0000000000000000", str)
+}
+
+// Test KeyMetadata
+
+func TestKeyMetadata_JSONMarshaling(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	metadata := KeyMetadata{
+		ID:        computeKeyID(pub),
+		CreatedAt: time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC),
+		ExpiresAt: time.Date(2025, 1, 15, 10, 30, 0, 0, time.UTC),
+	}
+
+	jsonData, err := json.Marshal(metadata)
+	require.NoError(t, err)
+
+	var decoded KeyMetadata
+	err = json.Unmarshal(jsonData, &decoded)
+	require.NoError(t, err)
+
+	assert.Equal(t, metadata.ID, decoded.ID)
+	assert.Equal(t, metadata.CreatedAt.Unix(), decoded.CreatedAt.Unix())
+	assert.Equal(t, metadata.ExpiresAt.Unix(), decoded.ExpiresAt.Unix())
+}
+
+func TestKeyMetadata_NoExpiration(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	metadata := KeyMetadata{
+		ID:        computeKeyID(pub),
+		CreatedAt: time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC),
+		ExpiresAt: time.Time{}, // Zero value = no expiration
+	}
+
+	jsonData, err := json.Marshal(metadata)
+	require.NoError(t, err)
+
+	var decoded KeyMetadata
+	err = json.Unmarshal(jsonData, &decoded)
+	require.NoError(t, err)
+
+	assert.True(t, decoded.ExpiresAt.IsZero())
+}
+
+// Test PublicKey
+
+func TestPublicKey_JSONMarshaling(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pubKey := PublicKey{
+		Key: pub,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+			ExpiresAt: time.Now().Add(365 * 24 * time.Hour).UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(pubKey)
+	require.NoError(t, err)
+
+	var decoded PublicKey
+	err = json.Unmarshal(jsonData, &decoded)
+	require.NoError(t, err)
+
+	assert.Equal(t, pubKey.Key, decoded.Key)
+	assert.Equal(t, pubKey.Metadata.ID, decoded.Metadata.ID)
+}
+
+// Test parsePublicKey
+
+func TestParsePublicKey_Valid(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	metadata := KeyMetadata{
+		ID:        computeKeyID(pub),
+		CreatedAt: time.Now().UTC(),
+		ExpiresAt: time.Now().Add(365 * 24 * time.Hour).UTC(),
+	}
+
+	pubKey := PublicKey{
+		Key:      pub,
+		Metadata: metadata,
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(pubKey)
+	require.NoError(t, err)
+
+	// Encode to PEM
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPublic,
+		Bytes: jsonData,
+	})
+
+	// Parse it back
+	parsed, rest, err := parsePublicKey(pemData, tagRootPublic)
+	require.NoError(t, err)
+	assert.Empty(t, rest)
+	assert.Equal(t, pub, parsed.Key)
+	assert.Equal(t, metadata.ID, parsed.Metadata.ID)
+}
+
+func TestParsePublicKey_InvalidPEM(t *testing.T) {
+	invalidPEM := []byte("not a PEM")
+
+	_, _, err := parsePublicKey(invalidPEM, tagRootPublic)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to decode PEM")
+}
+
+func TestParsePublicKey_WrongType(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pubKey := PublicKey{
+		Key: pub,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(pubKey)
+	require.NoError(t, err)
+
+	// Encode with wrong type
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  "WRONG TYPE",
+		Bytes: jsonData,
+	})
+
+	_, _, err = parsePublicKey(pemData, tagRootPublic)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "PEM type")
+}
+
+func TestParsePublicKey_InvalidJSON(t *testing.T) {
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPublic,
+		Bytes: []byte("invalid json"),
+	})
+
+	_, _, err := parsePublicKey(pemData, tagRootPublic)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to unmarshal")
+}
+
+func TestParsePublicKey_InvalidKeySize(t *testing.T) {
+	// Create a public key with wrong size
+	pubKey := PublicKey{
+		Key: []byte{0x01, 0x02, 0x03}, // Too short
+		Metadata: KeyMetadata{
+			ID:        KeyID{},
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(pubKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPublic,
+		Bytes: jsonData,
+	})
+
+	_, _, err = parsePublicKey(pemData, tagRootPublic)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "incorrect Ed25519 public key size")
+}
+
+func TestParsePublicKey_IDRecomputation(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	// Create a public key with WRONG ID
+	wrongID := KeyID{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
+	pubKey := PublicKey{
+		Key: pub,
+		Metadata: KeyMetadata{
+			ID:        wrongID,
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(pubKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPublic,
+		Bytes: jsonData,
+	})
+
+	// Parse should recompute the correct ID
+	parsed, _, err := parsePublicKey(pemData, tagRootPublic)
+	require.NoError(t, err)
+
+	correctID := computeKeyID(pub)
+	assert.Equal(t, correctID, parsed.Metadata.ID)
+	assert.NotEqual(t, wrongID, parsed.Metadata.ID)
+}
+
+// Test parsePublicKeyBundle
+
+func TestParsePublicKeyBundle_Single(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pubKey := PublicKey{
+		Key: pub,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(pubKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPublic,
+		Bytes: jsonData,
+	})
+
+	keys, err := parsePublicKeyBundle(pemData, tagRootPublic)
+	require.NoError(t, err)
+	assert.Len(t, keys, 1)
+	assert.Equal(t, pub, keys[0].Key)
+}
+
+func TestParsePublicKeyBundle_Multiple(t *testing.T) {
+	var bundle []byte
+
+	// Create 3 keys
+	for i := 0; i < 3; i++ {
+		pub, _, err := ed25519.GenerateKey(rand.Reader)
+		require.NoError(t, err)
+
+		pubKey := PublicKey{
+			Key: pub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(pub),
+				CreatedAt: time.Now().UTC(),
+			},
+		}
+
+		jsonData, err := json.Marshal(pubKey)
+		require.NoError(t, err)
+
+		pemData := pem.EncodeToMemory(&pem.Block{
+			Type:  tagRootPublic,
+			Bytes: jsonData,
+		})
+
+		bundle = append(bundle, pemData...)
+	}
+
+	keys, err := parsePublicKeyBundle(bundle, tagRootPublic)
+	require.NoError(t, err)
+	assert.Len(t, keys, 3)
+}
+
+func TestParsePublicKeyBundle_Empty(t *testing.T) {
+	_, err := parsePublicKeyBundle([]byte{}, tagRootPublic)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "no keys found")
+}
+
+func TestParsePublicKeyBundle_Invalid(t *testing.T) {
+	_, err := parsePublicKeyBundle([]byte("invalid data"), tagRootPublic)
+	assert.Error(t, err)
+}
+
+// Test PrivateKey
+
+func TestPrivateKey_JSONMarshaling(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	privKey := PrivateKey{
+		Key: priv,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(privKey)
+	require.NoError(t, err)
+
+	var decoded PrivateKey
+	err = json.Unmarshal(jsonData, &decoded)
+	require.NoError(t, err)
+
+	assert.Equal(t, privKey.Key, decoded.Key)
+	assert.Equal(t, privKey.Metadata.ID, decoded.Metadata.ID)
+}
+
+// Test parsePrivateKey
+
+func TestParsePrivateKey_Valid(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	privKey := PrivateKey{
+		Key: priv,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(privKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: jsonData,
+	})
+
+	parsed, err := parsePrivateKey(pemData, tagRootPrivate)
+	require.NoError(t, err)
+	assert.Equal(t, priv, parsed.Key)
+}
+
+func TestParsePrivateKey_InvalidPEM(t *testing.T) {
+	_, err := parsePrivateKey([]byte("not a PEM"), tagRootPrivate)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to decode PEM")
+}
+
+func TestParsePrivateKey_TrailingData(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	privKey := PrivateKey{
+		Key: priv,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(privKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: jsonData,
+	})
+
+	// Add trailing data
+	pemData = append(pemData, []byte("extra data")...)
+
+	_, err = parsePrivateKey(pemData, tagRootPrivate)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "trailing PEM data")
+}
+
+func TestParsePrivateKey_WrongType(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	privKey := PrivateKey{
+		Key: priv,
+		Metadata: KeyMetadata{
+			ID:        computeKeyID(pub),
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(privKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  "WRONG TYPE",
+		Bytes: jsonData,
+	})
+
+	_, err = parsePrivateKey(pemData, tagRootPrivate)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "PEM type")
+}
+
+func TestParsePrivateKey_InvalidKeySize(t *testing.T) {
+	privKey := PrivateKey{
+		Key: []byte{0x01, 0x02, 0x03}, // Too short
+		Metadata: KeyMetadata{
+			ID:        KeyID{},
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	jsonData, err := json.Marshal(privKey)
+	require.NoError(t, err)
+
+	pemData := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: jsonData,
+	})
+
+	_, err = parsePrivateKey(pemData, tagRootPrivate)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "incorrect Ed25519 private key size")
+}
+
+// Test verifyAny
+
+func TestVerifyAny_ValidSignature(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	message := []byte("test message")
+	signature := ed25519.Sign(priv, message)
+
+	rootKeys := []PublicKey{
+		{
+			Key: pub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(pub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	result := verifyAny(rootKeys, message, signature)
+	assert.True(t, result)
+}
+
+func TestVerifyAny_InvalidSignature(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	message := []byte("test message")
+	invalidSignature := make([]byte, ed25519.SignatureSize)
+
+	rootKeys := []PublicKey{
+		{
+			Key: pub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(pub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	result := verifyAny(rootKeys, message, invalidSignature)
+	assert.False(t, result)
+}
+
+func TestVerifyAny_MultipleKeys(t *testing.T) {
+	// Create 3 key pairs
+	pub1, priv1, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pub2, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pub3, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	message := []byte("test message")
+	signature := ed25519.Sign(priv1, message)
+
+	rootKeys := []PublicKey{
+		{Key: pub2, Metadata: KeyMetadata{ID: computeKeyID(pub2)}},
+		{Key: pub1, Metadata: KeyMetadata{ID: computeKeyID(pub1)}}, // Correct key in middle
+		{Key: pub3, Metadata: KeyMetadata{ID: computeKeyID(pub3)}},
+	}
+
+	result := verifyAny(rootKeys, message, signature)
+	assert.True(t, result)
+}
+
+func TestVerifyAny_NoMatchingKey(t *testing.T) {
+	_, priv1, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	pub2, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	message := []byte("test message")
+	signature := ed25519.Sign(priv1, message)
+
+	// Only include pub2, not pub1
+	rootKeys := []PublicKey{
+		{Key: pub2, Metadata: KeyMetadata{ID: computeKeyID(pub2)}},
+	}
+
+	result := verifyAny(rootKeys, message, signature)
+	assert.False(t, result)
+}
+
+func TestVerifyAny_EmptyKeys(t *testing.T) {
+	message := []byte("test message")
+	signature := make([]byte, ed25519.SignatureSize)
+
+	result := verifyAny([]PublicKey{}, message, signature)
+	assert.False(t, result)
+}
+
+func TestVerifyAny_TamperedMessage(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	message := []byte("test message")
+	signature := ed25519.Sign(priv, message)
+
+	rootKeys := []PublicKey{
+		{Key: pub, Metadata: KeyMetadata{ID: computeKeyID(pub)}},
+	}
+
+	// Verify with different message
+	tamperedMessage := []byte("different message")
+	result := verifyAny(rootKeys, tamperedMessage, signature)
+	assert.False(t, result)
+}

client/internal/updatemanager/reposign/revocation.go

@@ -0,0 +1,229 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"encoding/binary"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	maxRevocationSignatureAge       = 10 * 365 * 24 * time.Hour
+	defaultRevocationListExpiration = 365 * 24 * time.Hour
+)
+
+type RevocationList struct {
+	Revoked     map[KeyID]time.Time `json:"revoked"`      // KeyID -> revocation time
+	LastUpdated time.Time           `json:"last_updated"` // When the list was last modified
+	ExpiresAt   time.Time           `json:"expires_at"`   // When the list expires
+}
+
+func (rl RevocationList) MarshalJSON() ([]byte, error) {
+	// Convert map[KeyID]time.Time to map[string]time.Time
+	strMap := make(map[string]time.Time, len(rl.Revoked))
+	for k, v := range rl.Revoked {
+		strMap[k.String()] = v
+	}
+
+	return json.Marshal(map[string]interface{}{
+		"revoked":      strMap,
+		"last_updated": rl.LastUpdated,
+		"expires_at":   rl.ExpiresAt,
+	})
+}
+
+func (rl *RevocationList) UnmarshalJSON(data []byte) error {
+	var temp struct {
+		Revoked     map[string]time.Time `json:"revoked"`
+		LastUpdated time.Time            `json:"last_updated"`
+		ExpiresAt   time.Time            `json:"expires_at"`
+		Version     int                  `json:"version"`
+	}
+
+	if err := json.Unmarshal(data, &temp); err != nil {
+		return err
+	}
+
+	// Convert map[string]time.Time back to map[KeyID]time.Time
+	rl.Revoked = make(map[KeyID]time.Time, len(temp.Revoked))
+	for k, v := range temp.Revoked {
+		kid, err := ParseKeyID(k)
+		if err != nil {
+			return fmt.Errorf("failed to parse KeyID %q: %w", k, err)
+		}
+		rl.Revoked[kid] = v
+	}
+
+	rl.LastUpdated = temp.LastUpdated
+	rl.ExpiresAt = temp.ExpiresAt
+
+	return nil
+}
+
+func ParseRevocationList(data []byte) (*RevocationList, error) {
+	var rl RevocationList
+	if err := json.Unmarshal(data, &rl); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal revocation list: %w", err)
+	}
+
+	// Initialize the map if it's nil (in case of empty JSON object)
+	if rl.Revoked == nil {
+		rl.Revoked = make(map[KeyID]time.Time)
+	}
+
+	if rl.LastUpdated.IsZero() {
+		return nil, fmt.Errorf("revocation list missing last_updated timestamp")
+	}
+
+	if rl.ExpiresAt.IsZero() {
+		return nil, fmt.Errorf("revocation list missing expires_at timestamp")
+	}
+
+	return &rl, nil
+}
+
+func ValidateRevocationList(publicRootKeys []PublicKey, data []byte, signature Signature) (*RevocationList, error) {
+	revoList, err := ParseRevocationList(data)
+	if err != nil {
+		log.Debugf("failed to parse revocation list: %s", err)
+		return nil, err
+	}
+
+	now := time.Now().UTC()
+
+	// Validate signature timestamp
+	if signature.Timestamp.After(now.Add(maxClockSkew)) {
+		err := fmt.Errorf("revocation signature timestamp is in the future: %v", signature.Timestamp)
+		log.Debugf("revocation list signature error: %v", err)
+		return nil, err
+	}
+
+	if now.Sub(signature.Timestamp) > maxRevocationSignatureAge {
+		err := fmt.Errorf("revocation list signature is too old: %v (created %v)",
+			now.Sub(signature.Timestamp), signature.Timestamp)
+		log.Debugf("revocation list signature error: %v", err)
+		return nil, err
+	}
+
+	// Ensure LastUpdated is not in the future (with clock skew tolerance)
+	if revoList.LastUpdated.After(now.Add(maxClockSkew)) {
+		err := fmt.Errorf("revocation list LastUpdated is in the future: %v", revoList.LastUpdated)
+		log.Errorf("rejecting future-dated revocation list: %v", err)
+		return nil, err
+	}
+
+	// Check if the revocation list has expired
+	if now.After(revoList.ExpiresAt) {
+		err := fmt.Errorf("revocation list expired at %v (current time: %v)", revoList.ExpiresAt, now)
+		log.Errorf("rejecting expired revocation list: %v", err)
+		return nil, err
+	}
+
+	// Ensure ExpiresAt is not in the future by more than the expected expiration window
+	// (allows some clock skew but prevents maliciously long expiration times)
+	if revoList.ExpiresAt.After(now.Add(maxRevocationSignatureAge)) {
+		err := fmt.Errorf("revocation list ExpiresAt is too far in the future: %v", revoList.ExpiresAt)
+		log.Errorf("rejecting revocation list with invalid expiration: %v", err)
+		return nil, err
+	}
+
+	// Validate signature timestamp is close to LastUpdated
+	// (prevents signing old lists with new timestamps)
+	timeDiff := signature.Timestamp.Sub(revoList.LastUpdated).Abs()
+	if timeDiff > maxClockSkew {
+		err := fmt.Errorf("signature timestamp %v differs too much from list LastUpdated %v (diff: %v)",
+			signature.Timestamp, revoList.LastUpdated, timeDiff)
+		log.Errorf("timestamp mismatch in revocation list: %v", err)
+		return nil, err
+	}
+
+	// Reconstruct the signed message: revocation_list_data || timestamp || version
+	msg := make([]byte, 0, len(data)+8)
+	msg = append(msg, data...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(signature.Timestamp.Unix()))
+
+	if !verifyAny(publicRootKeys, msg, signature.Signature) {
+		return nil, errors.New("revocation list verification failed")
+	}
+	return revoList, nil
+}
+
+func CreateRevocationList(privateRootKey RootKey, expiration time.Duration) ([]byte, []byte, error) {
+	now := time.Now()
+	rl := RevocationList{
+		Revoked:     make(map[KeyID]time.Time),
+		LastUpdated: now.UTC(),
+		ExpiresAt:   now.Add(expiration).UTC(),
+	}
+
+	signature, err := signRevocationList(privateRootKey, rl)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to sign revocation list: %w", err)
+	}
+
+	rlData, err := json.Marshal(&rl)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to marshal revocation list: %w", err)
+	}
+
+	signData, err := json.Marshal(signature)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to marshal signature: %w", err)
+	}
+
+	return rlData, signData, nil
+}
+
+func ExtendRevocationList(privateRootKey RootKey, rl RevocationList, kid KeyID, expiration time.Duration) ([]byte, []byte, error) {
+	now := time.Now().UTC()
+
+	rl.Revoked[kid] = now
+	rl.LastUpdated = now
+	rl.ExpiresAt = now.Add(expiration)
+
+	signature, err := signRevocationList(privateRootKey, rl)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to sign revocation list: %w", err)
+	}
+
+	rlData, err := json.Marshal(&rl)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to marshal revocation list: %w", err)
+	}
+
+	signData, err := json.Marshal(signature)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to marshal signature: %w", err)
+	}
+
+	return rlData, signData, nil
+}
+
+func signRevocationList(privateRootKey RootKey, rl RevocationList) (*Signature, error) {
+	data, err := json.Marshal(rl)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal revocation list for signing: %w", err)
+	}
+
+	timestamp := time.Now().UTC()
+
+	msg := make([]byte, 0, len(data)+8)
+	msg = append(msg, data...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(timestamp.Unix()))
+
+	sig := ed25519.Sign(privateRootKey.Key, msg)
+
+	signature := &Signature{
+		Signature: sig,
+		Timestamp: timestamp,
+		KeyID:     privateRootKey.Metadata.ID,
+		Algorithm: "ed25519",
+		HashAlgo:  "sha512",
+	}
+
+	return signature, nil
+}

client/internal/updatemanager/reposign/revocation_test.go

@@ -0,0 +1,860 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Test RevocationList marshaling/unmarshaling
+
+func TestRevocationList_MarshalJSON(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	keyID := computeKeyID(pub)
+	revokedTime := time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC)
+	lastUpdated := time.Date(2024, 1, 15, 11, 0, 0, 0, time.UTC)
+	expiresAt := time.Date(2024, 4, 15, 11, 0, 0, 0, time.UTC)
+
+	rl := &RevocationList{
+		Revoked: map[KeyID]time.Time{
+			keyID: revokedTime,
+		},
+		LastUpdated: lastUpdated,
+		ExpiresAt:   expiresAt,
+	}
+
+	jsonData, err := json.Marshal(rl)
+	require.NoError(t, err)
+
+	// Verify it can be unmarshaled back
+	var decoded map[string]interface{}
+	err = json.Unmarshal(jsonData, &decoded)
+	require.NoError(t, err)
+
+	assert.Contains(t, decoded, "revoked")
+	assert.Contains(t, decoded, "last_updated")
+	assert.Contains(t, decoded, "expires_at")
+}
+
+func TestRevocationList_UnmarshalJSON(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	keyID := computeKeyID(pub)
+	revokedTime := time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC)
+	lastUpdated := time.Date(2024, 1, 15, 11, 0, 0, 0, time.UTC)
+
+	jsonData := map[string]interface{}{
+		"revoked": map[string]string{
+			keyID.String(): revokedTime.Format(time.RFC3339),
+		},
+		"last_updated": lastUpdated.Format(time.RFC3339),
+	}
+
+	jsonBytes, err := json.Marshal(jsonData)
+	require.NoError(t, err)
+
+	var rl RevocationList
+	err = json.Unmarshal(jsonBytes, &rl)
+	require.NoError(t, err)
+
+	assert.Len(t, rl.Revoked, 1)
+	assert.Contains(t, rl.Revoked, keyID)
+	assert.Equal(t, lastUpdated.Unix(), rl.LastUpdated.Unix())
+}
+
+func TestRevocationList_MarshalUnmarshal_Roundtrip(t *testing.T) {
+	pub1, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	pub2, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	keyID1 := computeKeyID(pub1)
+	keyID2 := computeKeyID(pub2)
+
+	original := &RevocationList{
+		Revoked: map[KeyID]time.Time{
+			keyID1: time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC),
+			keyID2: time.Date(2024, 2, 20, 14, 45, 0, 0, time.UTC),
+		},
+		LastUpdated: time.Date(2024, 2, 20, 15, 0, 0, 0, time.UTC),
+	}
+
+	// Marshal
+	jsonData, err := original.MarshalJSON()
+	require.NoError(t, err)
+
+	// Unmarshal
+	var decoded RevocationList
+	err = decoded.UnmarshalJSON(jsonData)
+	require.NoError(t, err)
+
+	// Verify
+	assert.Len(t, decoded.Revoked, 2)
+	assert.Equal(t, original.Revoked[keyID1].Unix(), decoded.Revoked[keyID1].Unix())
+	assert.Equal(t, original.Revoked[keyID2].Unix(), decoded.Revoked[keyID2].Unix())
+	assert.Equal(t, original.LastUpdated.Unix(), decoded.LastUpdated.Unix())
+}
+
+func TestRevocationList_UnmarshalJSON_InvalidKeyID(t *testing.T) {
+	jsonData := []byte(`{
+		"revoked": {
+			"invalid_key_id": "2024-01-15T10:30:00Z"
+		},
+		"last_updated": "2024-01-15T11:00:00Z"
+	}`)
+
+	var rl RevocationList
+	err := json.Unmarshal(jsonData, &rl)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to parse KeyID")
+}
+
+func TestRevocationList_EmptyRevoked(t *testing.T) {
+	rl := &RevocationList{
+		Revoked:     make(map[KeyID]time.Time),
+		LastUpdated: time.Now().UTC(),
+	}
+
+	jsonData, err := rl.MarshalJSON()
+	require.NoError(t, err)
+
+	var decoded RevocationList
+	err = decoded.UnmarshalJSON(jsonData)
+	require.NoError(t, err)
+
+	assert.Empty(t, decoded.Revoked)
+	assert.NotNil(t, decoded.Revoked)
+}
+
+// Test ParseRevocationList
+
+func TestParseRevocationList_Valid(t *testing.T) {
+	pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	keyID := computeKeyID(pub)
+	revokedTime := time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC)
+	lastUpdated := time.Date(2024, 1, 15, 11, 0, 0, 0, time.UTC)
+
+	rl := RevocationList{
+		Revoked: map[KeyID]time.Time{
+			keyID: revokedTime,
+		},
+		LastUpdated: lastUpdated,
+		ExpiresAt:   time.Date(2025, 2, 20, 14, 45, 0, 0, time.UTC),
+	}
+
+	jsonData, err := rl.MarshalJSON()
+	require.NoError(t, err)
+
+	parsed, err := ParseRevocationList(jsonData)
+	require.NoError(t, err)
+	assert.NotNil(t, parsed)
+	assert.Len(t, parsed.Revoked, 1)
+	assert.Equal(t, lastUpdated.Unix(), parsed.LastUpdated.Unix())
+}
+
+func TestParseRevocationList_InvalidJSON(t *testing.T) {
+	invalidJSON := []byte("not valid json")
+
+	_, err := ParseRevocationList(invalidJSON)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to unmarshal")
+}
+
+func TestParseRevocationList_MissingLastUpdated(t *testing.T) {
+	jsonData := []byte(`{
+		"revoked": {}
+	}`)
+
+	_, err := ParseRevocationList(jsonData)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "missing last_updated")
+}
+
+func TestParseRevocationList_EmptyObject(t *testing.T) {
+	jsonData := []byte(`{}`)
+
+	_, err := ParseRevocationList(jsonData)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "missing last_updated")
+}
+
+func TestParseRevocationList_NilRevoked(t *testing.T) {
+	lastUpdated := time.Now().UTC()
+	expiresAt := lastUpdated.Add(90 * 24 * time.Hour)
+	jsonData := []byte(`{
+		"last_updated": "` + lastUpdated.Format(time.RFC3339) + `",
+		"expires_at": "` + expiresAt.Format(time.RFC3339) + `"
+	}`)
+
+	parsed, err := ParseRevocationList(jsonData)
+	require.NoError(t, err)
+	assert.NotNil(t, parsed.Revoked)
+	assert.Empty(t, parsed.Revoked)
+}
+
+func TestParseRevocationList_MissingExpiresAt(t *testing.T) {
+	lastUpdated := time.Now().UTC()
+	jsonData := []byte(`{
+		"revoked": {},
+		"last_updated": "` + lastUpdated.Format(time.RFC3339) + `"
+	}`)
+
+	_, err := ParseRevocationList(jsonData)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "missing expires_at")
+}
+
+// Test ValidateRevocationList
+
+func TestValidateRevocationList_Valid(t *testing.T) {
+	// Generate root key
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list
+	rlData, sigData, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	signature, err := ParseSignature(sigData)
+	require.NoError(t, err)
+
+	// Validate
+	rl, err := ValidateRevocationList(rootKeys, rlData, *signature)
+	require.NoError(t, err)
+	assert.NotNil(t, rl)
+	assert.Empty(t, rl.Revoked)
+}
+
+func TestValidateRevocationList_InvalidSignature(t *testing.T) {
+	// Generate root key
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list
+	rlData, _, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Create invalid signature
+	invalidSig := Signature{
+		Signature: make([]byte, 64),
+		Timestamp: time.Now().UTC(),
+		KeyID:     computeKeyID(rootPub),
+		Algorithm: "ed25519",
+		HashAlgo:  "sha512",
+	}
+
+	// Validate should fail
+	_, err = ValidateRevocationList(rootKeys, rlData, invalidSig)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "verification failed")
+}
+
+func TestValidateRevocationList_FutureTimestamp(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rlData, sigData, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	signature, err := ParseSignature(sigData)
+	require.NoError(t, err)
+
+	// Modify timestamp to be in the future
+	signature.Timestamp = time.Now().UTC().Add(10 * time.Minute)
+
+	_, err = ValidateRevocationList(rootKeys, rlData, *signature)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "in the future")
+}
+
+func TestValidateRevocationList_TooOld(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rlData, sigData, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	signature, err := ParseSignature(sigData)
+	require.NoError(t, err)
+
+	// Modify timestamp to be too old
+	signature.Timestamp = time.Now().UTC().Add(-20 * 365 * 24 * time.Hour)
+
+	_, err = ValidateRevocationList(rootKeys, rlData, *signature)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "too old")
+}
+
+func TestValidateRevocationList_InvalidJSON(t *testing.T) {
+	rootPub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	signature := Signature{
+		Signature: make([]byte, 64),
+		Timestamp: time.Now().UTC(),
+		KeyID:     computeKeyID(rootPub),
+		Algorithm: "ed25519",
+		HashAlgo:  "sha512",
+	}
+
+	_, err = ValidateRevocationList(rootKeys, []byte("invalid json"), signature)
+	assert.Error(t, err)
+}
+
+func TestValidateRevocationList_FutureLastUpdated(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list with future LastUpdated
+	rl := RevocationList{
+		Revoked:     make(map[KeyID]time.Time),
+		LastUpdated: time.Now().UTC().Add(10 * time.Minute),
+		ExpiresAt:   time.Now().UTC().Add(365 * 24 * time.Hour),
+	}
+
+	rlData, err := json.Marshal(rl)
+	require.NoError(t, err)
+
+	// Sign it
+	sig, err := signRevocationList(rootKey, rl)
+	require.NoError(t, err)
+
+	_, err = ValidateRevocationList(rootKeys, rlData, *sig)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "LastUpdated is in the future")
+}
+
+func TestValidateRevocationList_TimestampMismatch(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list with LastUpdated far in the past
+	rl := RevocationList{
+		Revoked:     make(map[KeyID]time.Time),
+		LastUpdated: time.Now().UTC().Add(-1 * time.Hour),
+		ExpiresAt:   time.Now().UTC().Add(365 * 24 * time.Hour),
+	}
+
+	rlData, err := json.Marshal(rl)
+	require.NoError(t, err)
+
+	// Sign it with current timestamp
+	sig, err := signRevocationList(rootKey, rl)
+	require.NoError(t, err)
+
+	// Modify signature timestamp to differ too much from LastUpdated
+	sig.Timestamp = time.Now().UTC()
+
+	_, err = ValidateRevocationList(rootKeys, rlData, *sig)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "differs too much")
+}
+
+func TestValidateRevocationList_Expired(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list that expired in the past
+	now := time.Now().UTC()
+	rl := RevocationList{
+		Revoked:     make(map[KeyID]time.Time),
+		LastUpdated: now.Add(-100 * 24 * time.Hour),
+		ExpiresAt:   now.Add(-10 * 24 * time.Hour), // Expired 10 days ago
+	}
+
+	rlData, err := json.Marshal(rl)
+	require.NoError(t, err)
+
+	// Sign it
+	sig, err := signRevocationList(rootKey, rl)
+	require.NoError(t, err)
+	// Adjust signature timestamp to match LastUpdated
+	sig.Timestamp = rl.LastUpdated
+
+	_, err = ValidateRevocationList(rootKeys, rlData, *sig)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "expired")
+}
+
+func TestValidateRevocationList_ExpiresAtTooFarInFuture(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list with ExpiresAt too far in the future (beyond maxRevocationSignatureAge)
+	now := time.Now().UTC()
+	rl := RevocationList{
+		Revoked:     make(map[KeyID]time.Time),
+		LastUpdated: now,
+		ExpiresAt:   now.Add(15 * 365 * 24 * time.Hour), // 15 years in the future
+	}
+
+	rlData, err := json.Marshal(rl)
+	require.NoError(t, err)
+
+	// Sign it
+	sig, err := signRevocationList(rootKey, rl)
+	require.NoError(t, err)
+
+	_, err = ValidateRevocationList(rootKeys, rlData, *sig)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "too far in the future")
+}
+
+// Test CreateRevocationList
+
+func TestCreateRevocationList_Valid(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rlData, sigData, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+	assert.NotEmpty(t, rlData)
+	assert.NotEmpty(t, sigData)
+
+	// Verify it can be parsed
+	rl, err := ParseRevocationList(rlData)
+	require.NoError(t, err)
+	assert.Empty(t, rl.Revoked)
+	assert.False(t, rl.LastUpdated.IsZero())
+
+	// Verify signature can be parsed
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sig.Signature)
+}
+
+// Test ExtendRevocationList
+
+func TestExtendRevocationList_AddKey(t *testing.T) {
+	// Generate root key
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create empty revocation list
+	rlData, _, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err := ParseRevocationList(rlData)
+	require.NoError(t, err)
+	assert.Empty(t, rl.Revoked)
+
+	// Generate a key to revoke
+	revokedPub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	revokedKeyID := computeKeyID(revokedPub)
+
+	// Extend the revocation list
+	newRLData, newSigData, err := ExtendRevocationList(rootKey, *rl, revokedKeyID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Verify the new list
+	newRL, err := ParseRevocationList(newRLData)
+	require.NoError(t, err)
+	assert.Len(t, newRL.Revoked, 1)
+	assert.Contains(t, newRL.Revoked, revokedKeyID)
+
+	// Verify signature
+	sig, err := ParseSignature(newSigData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sig.Signature)
+}
+
+func TestExtendRevocationList_MultipleKeys(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create empty revocation list
+	rlData, _, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err := ParseRevocationList(rlData)
+	require.NoError(t, err)
+
+	// Add first key
+	key1Pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	key1ID := computeKeyID(key1Pub)
+
+	rlData, _, err = ExtendRevocationList(rootKey, *rl, key1ID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err = ParseRevocationList(rlData)
+	require.NoError(t, err)
+	assert.Len(t, rl.Revoked, 1)
+
+	// Add second key
+	key2Pub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	key2ID := computeKeyID(key2Pub)
+
+	rlData, _, err = ExtendRevocationList(rootKey, *rl, key2ID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err = ParseRevocationList(rlData)
+	require.NoError(t, err)
+	assert.Len(t, rl.Revoked, 2)
+	assert.Contains(t, rl.Revoked, key1ID)
+	assert.Contains(t, rl.Revoked, key2ID)
+}
+
+func TestExtendRevocationList_DuplicateKey(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create empty revocation list
+	rlData, _, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err := ParseRevocationList(rlData)
+	require.NoError(t, err)
+
+	// Add a key
+	keyPub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	keyID := computeKeyID(keyPub)
+
+	rlData, _, err = ExtendRevocationList(rootKey, *rl, keyID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err = ParseRevocationList(rlData)
+	require.NoError(t, err)
+	firstRevocationTime := rl.Revoked[keyID]
+
+	// Wait a bit
+	time.Sleep(10 * time.Millisecond)
+
+	// Add the same key again
+	rlData, _, err = ExtendRevocationList(rootKey, *rl, keyID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err = ParseRevocationList(rlData)
+	require.NoError(t, err)
+	assert.Len(t, rl.Revoked, 1)
+
+	// The revocation time should be updated
+	secondRevocationTime := rl.Revoked[keyID]
+	assert.True(t, secondRevocationTime.After(firstRevocationTime) || secondRevocationTime.Equal(firstRevocationTime))
+}
+
+func TestExtendRevocationList_UpdatesLastUpdated(t *testing.T) {
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Create revocation list
+	rlData, _, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err := ParseRevocationList(rlData)
+	require.NoError(t, err)
+	firstLastUpdated := rl.LastUpdated
+
+	// Wait a bit
+	time.Sleep(10 * time.Millisecond)
+
+	// Extend list
+	keyPub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	keyID := computeKeyID(keyPub)
+
+	rlData, _, err = ExtendRevocationList(rootKey, *rl, keyID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	rl, err = ParseRevocationList(rlData)
+	require.NoError(t, err)
+
+	// LastUpdated should be updated
+	assert.True(t, rl.LastUpdated.After(firstLastUpdated))
+}
+
+// Integration test
+
+func TestRevocationList_FullWorkflow(t *testing.T) {
+	// Create root key
+	rootPub, rootPriv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	rootKey := RootKey{
+		PrivateKey{
+			Key: rootPriv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	rootKeys := []PublicKey{
+		{
+			Key: rootPub,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(rootPub),
+				CreatedAt: time.Now().UTC(),
+			},
+		},
+	}
+
+	// Step 1: Create empty revocation list
+	rlData, sigData, err := CreateRevocationList(rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Step 2: Validate it
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+
+	rl, err := ValidateRevocationList(rootKeys, rlData, *sig)
+	require.NoError(t, err)
+	assert.Empty(t, rl.Revoked)
+
+	// Step 3: Revoke a key
+	revokedPub, _, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	revokedKeyID := computeKeyID(revokedPub)
+
+	rlData, sigData, err = ExtendRevocationList(rootKey, *rl, revokedKeyID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Step 4: Validate the extended list
+	sig, err = ParseSignature(sigData)
+	require.NoError(t, err)
+
+	rl, err = ValidateRevocationList(rootKeys, rlData, *sig)
+	require.NoError(t, err)
+	assert.Len(t, rl.Revoked, 1)
+	assert.Contains(t, rl.Revoked, revokedKeyID)
+
+	// Step 5: Verify the revocation time is reasonable
+	revTime := rl.Revoked[revokedKeyID]
+	now := time.Now().UTC()
+	assert.True(t, revTime.Before(now) || revTime.Equal(now))
+	assert.True(t, now.Sub(revTime) < time.Minute)
+}

client/internal/updatemanager/reposign/root.go

@@ -0,0 +1,120 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/binary"
+	"encoding/json"
+	"encoding/pem"
+	"fmt"
+	"time"
+)
+
+const (
+	tagRootPrivate = "ROOT PRIVATE KEY"
+	tagRootPublic  = "ROOT PUBLIC KEY"
+)
+
+// RootKey is a root Key used to sign signing keys
+type RootKey struct {
+	PrivateKey
+}
+
+func (k RootKey) String() string {
+	return fmt.Sprintf(
+		"RootKey[ID=%s, CreatedAt=%s, ExpiresAt=%s]",
+		k.Metadata.ID,
+		k.Metadata.CreatedAt.Format(time.RFC3339),
+		k.Metadata.ExpiresAt.Format(time.RFC3339),
+	)
+}
+
+func ParseRootKey(privKeyPEM []byte) (*RootKey, error) {
+	pk, err := parsePrivateKey(privKeyPEM, tagRootPrivate)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse root Key: %w", err)
+	}
+	return &RootKey{pk}, nil
+}
+
+// ParseRootPublicKey parses a root public key from PEM format
+func ParseRootPublicKey(pubKeyPEM []byte) (PublicKey, error) {
+	pk, _, err := parsePublicKey(pubKeyPEM, tagRootPublic)
+	if err != nil {
+		return PublicKey{}, fmt.Errorf("failed to parse root public key: %w", err)
+	}
+	return pk, nil
+}
+
+// GenerateRootKey generates a new root Key pair with Metadata
+func GenerateRootKey(expiration time.Duration) (*RootKey, []byte, []byte, error) {
+	now := time.Now()
+	expirationTime := now.Add(expiration)
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	metadata := KeyMetadata{
+		ID:        computeKeyID(pub),
+		CreatedAt: now.UTC(),
+		ExpiresAt: expirationTime.UTC(),
+	}
+
+	rk := &RootKey{
+		PrivateKey{
+			Key:      priv,
+			Metadata: metadata,
+		},
+	}
+
+	// Marshal PrivateKey struct to JSON
+	privJSON, err := json.Marshal(rk.PrivateKey)
+	if err != nil {
+		return nil, nil, nil, fmt.Errorf("failed to marshal private key: %w", err)
+	}
+
+	// Marshal PublicKey struct to JSON
+	pubKey := PublicKey{
+		Key:      pub,
+		Metadata: metadata,
+	}
+	pubJSON, err := json.Marshal(pubKey)
+	if err != nil {
+		return nil, nil, nil, fmt.Errorf("failed to marshal public key: %w", err)
+	}
+
+	// Encode to PEM with metadata embedded in bytes
+	privPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: privJSON,
+	})
+
+	pubPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPublic,
+		Bytes: pubJSON,
+	})
+
+	return rk, privPEM, pubPEM, nil
+}
+
+func SignArtifactKey(rootKey RootKey, data []byte) ([]byte, error) {
+	timestamp := time.Now().UTC()
+
+	// This ensures the timestamp is cryptographically bound to the signature
+	msg := make([]byte, 0, len(data)+8)
+	msg = append(msg, data...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(timestamp.Unix()))
+
+	sig := ed25519.Sign(rootKey.Key, msg)
+	// Create signature bundle with timestamp and Metadata
+	bundle := Signature{
+		Signature: sig,
+		Timestamp: timestamp,
+		KeyID:     rootKey.Metadata.ID,
+		Algorithm: "ed25519",
+		HashAlgo:  "sha512",
+	}
+
+	return json.Marshal(bundle)
+}

client/internal/updatemanager/reposign/root_test.go

@@ -0,0 +1,476 @@
+package reposign
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/binary"
+	"encoding/json"
+	"encoding/pem"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Test RootKey.String()
+
+func TestRootKey_String(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	createdAt := time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC)
+	expiresAt := time.Date(2034, 1, 15, 10, 30, 0, 0, time.UTC)
+
+	rk := RootKey{
+		PrivateKey{
+			Key: priv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(pub),
+				CreatedAt: createdAt,
+				ExpiresAt: expiresAt,
+			},
+		},
+	}
+
+	str := rk.String()
+	assert.Contains(t, str, "RootKey")
+	assert.Contains(t, str, computeKeyID(pub).String())
+	assert.Contains(t, str, "2024-01-15")
+	assert.Contains(t, str, "2034-01-15")
+}
+
+func TestRootKey_String_NoExpiration(t *testing.T) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+
+	createdAt := time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC)
+
+	rk := RootKey{
+		PrivateKey{
+			Key: priv,
+			Metadata: KeyMetadata{
+				ID:        computeKeyID(pub),
+				CreatedAt: createdAt,
+				ExpiresAt: time.Time{}, // No expiration
+			},
+		},
+	}
+
+	str := rk.String()
+	assert.Contains(t, str, "RootKey")
+	assert.Contains(t, str, "0001-01-01") // Zero time format
+}
+
+// Test GenerateRootKey
+
+func TestGenerateRootKey_Valid(t *testing.T) {
+	expiration := 10 * 365 * 24 * time.Hour // 10 years
+
+	rk, privPEM, pubPEM, err := GenerateRootKey(expiration)
+	require.NoError(t, err)
+	assert.NotNil(t, rk)
+	assert.NotEmpty(t, privPEM)
+	assert.NotEmpty(t, pubPEM)
+
+	// Verify the key has correct metadata
+	assert.False(t, rk.Metadata.CreatedAt.IsZero())
+	assert.False(t, rk.Metadata.ExpiresAt.IsZero())
+	assert.True(t, rk.Metadata.ExpiresAt.After(rk.Metadata.CreatedAt))
+
+	// Verify expiration is approximately correct
+	expectedExpiration := time.Now().Add(expiration)
+	timeDiff := rk.Metadata.ExpiresAt.Sub(expectedExpiration)
+	assert.True(t, timeDiff < time.Minute && timeDiff > -time.Minute)
+}
+
+func TestGenerateRootKey_ShortExpiration(t *testing.T) {
+	expiration := 24 * time.Hour // 1 day
+
+	rk, _, _, err := GenerateRootKey(expiration)
+	require.NoError(t, err)
+	assert.NotNil(t, rk)
+
+	// Verify expiration
+	expectedExpiration := time.Now().Add(expiration)
+	timeDiff := rk.Metadata.ExpiresAt.Sub(expectedExpiration)
+	assert.True(t, timeDiff < time.Minute && timeDiff > -time.Minute)
+}
+
+func TestGenerateRootKey_ZeroExpiration(t *testing.T) {
+	rk, _, _, err := GenerateRootKey(0)
+	require.NoError(t, err)
+	assert.NotNil(t, rk)
+
+	// With zero expiration, ExpiresAt should be equal to CreatedAt
+	assert.Equal(t, rk.Metadata.CreatedAt, rk.Metadata.ExpiresAt)
+}
+
+func TestGenerateRootKey_PEMFormat(t *testing.T) {
+	rk, privPEM, pubPEM, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Verify private key PEM
+	privBlock, _ := pem.Decode(privPEM)
+	require.NotNil(t, privBlock)
+	assert.Equal(t, tagRootPrivate, privBlock.Type)
+
+	var privKey PrivateKey
+	err = json.Unmarshal(privBlock.Bytes, &privKey)
+	require.NoError(t, err)
+	assert.Equal(t, rk.Key, privKey.Key)
+
+	// Verify public key PEM
+	pubBlock, _ := pem.Decode(pubPEM)
+	require.NotNil(t, pubBlock)
+	assert.Equal(t, tagRootPublic, pubBlock.Type)
+
+	var pubKey PublicKey
+	err = json.Unmarshal(pubBlock.Bytes, &pubKey)
+	require.NoError(t, err)
+	assert.Equal(t, rk.Metadata.ID, pubKey.Metadata.ID)
+}
+
+func TestGenerateRootKey_KeySize(t *testing.T) {
+	rk, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Ed25519 private key should be 64 bytes
+	assert.Equal(t, ed25519.PrivateKeySize, len(rk.Key))
+
+	// Ed25519 public key should be 32 bytes
+	pubKey := rk.Key.Public().(ed25519.PublicKey)
+	assert.Equal(t, ed25519.PublicKeySize, len(pubKey))
+}
+
+func TestGenerateRootKey_UniqueKeys(t *testing.T) {
+	rk1, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	rk2, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Different keys should have different IDs
+	assert.NotEqual(t, rk1.Metadata.ID, rk2.Metadata.ID)
+	assert.NotEqual(t, rk1.Key, rk2.Key)
+}
+
+// Test ParseRootKey
+
+func TestParseRootKey_Valid(t *testing.T) {
+	original, privPEM, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	parsed, err := ParseRootKey(privPEM)
+	require.NoError(t, err)
+	assert.NotNil(t, parsed)
+
+	// Verify the parsed key matches the original
+	assert.Equal(t, original.Key, parsed.Key)
+	assert.Equal(t, original.Metadata.ID, parsed.Metadata.ID)
+	assert.Equal(t, original.Metadata.CreatedAt.Unix(), parsed.Metadata.CreatedAt.Unix())
+	assert.Equal(t, original.Metadata.ExpiresAt.Unix(), parsed.Metadata.ExpiresAt.Unix())
+}
+
+func TestParseRootKey_InvalidPEM(t *testing.T) {
+	_, err := ParseRootKey([]byte("not a valid PEM"))
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to parse")
+}
+
+func TestParseRootKey_EmptyData(t *testing.T) {
+	_, err := ParseRootKey([]byte{})
+	assert.Error(t, err)
+}
+
+func TestParseRootKey_WrongType(t *testing.T) {
+	// Generate an artifact key instead of root key
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	artifactKey, privPEM, _, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+
+	// Try to parse artifact key as root key
+	_, err = ParseRootKey(privPEM)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "PEM type")
+
+	// Just to use artifactKey to avoid unused variable warning
+	_ = artifactKey
+}
+
+func TestParseRootKey_CorruptedJSON(t *testing.T) {
+	// Create PEM with corrupted JSON
+	corruptedPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: []byte("corrupted json data"),
+	})
+
+	_, err := ParseRootKey(corruptedPEM)
+	assert.Error(t, err)
+}
+
+func TestParseRootKey_InvalidKeySize(t *testing.T) {
+	// Create a key with invalid size
+	invalidKey := PrivateKey{
+		Key: []byte{0x01, 0x02, 0x03}, // Too short
+		Metadata: KeyMetadata{
+			ID:        KeyID{},
+			CreatedAt: time.Now().UTC(),
+		},
+	}
+
+	privJSON, err := json.Marshal(invalidKey)
+	require.NoError(t, err)
+
+	invalidPEM := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: privJSON,
+	})
+
+	_, err = ParseRootKey(invalidPEM)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "incorrect Ed25519 private key size")
+}
+
+func TestParseRootKey_Roundtrip(t *testing.T) {
+	// Generate a key
+	original, privPEM, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Parse it
+	parsed, err := ParseRootKey(privPEM)
+	require.NoError(t, err)
+
+	// Generate PEM again from parsed key
+	privJSON2, err := json.Marshal(parsed.PrivateKey)
+	require.NoError(t, err)
+
+	privPEM2 := pem.EncodeToMemory(&pem.Block{
+		Type:  tagRootPrivate,
+		Bytes: privJSON2,
+	})
+
+	// Parse again
+	parsed2, err := ParseRootKey(privPEM2)
+	require.NoError(t, err)
+
+	// Should still match original
+	assert.Equal(t, original.Key, parsed2.Key)
+	assert.Equal(t, original.Metadata.ID, parsed2.Metadata.ID)
+}
+
+// Test SignArtifactKey
+
+func TestSignArtifactKey_Valid(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	data := []byte("test data to sign")
+	sigData, err := SignArtifactKey(*rootKey, data)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sigData)
+
+	// Parse and verify signature
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sig.Signature)
+	assert.Equal(t, rootKey.Metadata.ID, sig.KeyID)
+	assert.Equal(t, "ed25519", sig.Algorithm)
+	assert.Equal(t, "sha512", sig.HashAlgo)
+	assert.False(t, sig.Timestamp.IsZero())
+}
+
+func TestSignArtifactKey_EmptyData(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	sigData, err := SignArtifactKey(*rootKey, []byte{})
+	require.NoError(t, err)
+	assert.NotEmpty(t, sigData)
+
+	// Should still be able to parse
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sig.Signature)
+}
+
+func TestSignArtifactKey_Verify(t *testing.T) {
+	rootKey, _, pubPEM, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Parse public key
+	pubKey, _, err := parsePublicKey(pubPEM, tagRootPublic)
+	require.NoError(t, err)
+
+	// Sign some data
+	data := []byte("test data for verification")
+	sigData, err := SignArtifactKey(*rootKey, data)
+	require.NoError(t, err)
+
+	// Parse signature
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+
+	// Reconstruct message
+	msg := make([]byte, 0, len(data)+8)
+	msg = append(msg, data...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(sig.Timestamp.Unix()))
+
+	// Verify signature
+	valid := ed25519.Verify(pubKey.Key, msg, sig.Signature)
+	assert.True(t, valid)
+}
+
+func TestSignArtifactKey_DifferentData(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	data1 := []byte("data1")
+	data2 := []byte("data2")
+
+	sig1, err := SignArtifactKey(*rootKey, data1)
+	require.NoError(t, err)
+
+	sig2, err := SignArtifactKey(*rootKey, data2)
+	require.NoError(t, err)
+
+	// Different data should produce different signatures
+	assert.NotEqual(t, sig1, sig2)
+}
+
+func TestSignArtifactKey_MultipleSignatures(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	data := []byte("test data")
+
+	// Sign twice with a small delay
+	sig1, err := SignArtifactKey(*rootKey, data)
+	require.NoError(t, err)
+
+	time.Sleep(10 * time.Millisecond)
+
+	sig2, err := SignArtifactKey(*rootKey, data)
+	require.NoError(t, err)
+
+	// Signatures should be different due to different timestamps
+	assert.NotEqual(t, sig1, sig2)
+
+	// Parse both signatures
+	parsed1, err := ParseSignature(sig1)
+	require.NoError(t, err)
+
+	parsed2, err := ParseSignature(sig2)
+	require.NoError(t, err)
+
+	// Timestamps should be different
+	assert.True(t, parsed2.Timestamp.After(parsed1.Timestamp))
+}
+
+func TestSignArtifactKey_LargeData(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Create 1MB of data
+	largeData := make([]byte, 1024*1024)
+	for i := range largeData {
+		largeData[i] = byte(i % 256)
+	}
+
+	sigData, err := SignArtifactKey(*rootKey, largeData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sigData)
+
+	// Verify signature can be parsed
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, sig.Signature)
+}
+
+func TestSignArtifactKey_TimestampInSignature(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	beforeSign := time.Now().UTC()
+	data := []byte("test data")
+	sigData, err := SignArtifactKey(*rootKey, data)
+	require.NoError(t, err)
+	afterSign := time.Now().UTC()
+
+	sig, err := ParseSignature(sigData)
+	require.NoError(t, err)
+
+	// Timestamp should be between before and after
+	assert.True(t, sig.Timestamp.After(beforeSign.Add(-time.Second)))
+	assert.True(t, sig.Timestamp.Before(afterSign.Add(time.Second)))
+}
+
+// Integration test
+
+func TestRootKey_FullWorkflow(t *testing.T) {
+	// Step 1: Generate root key
+	rootKey, privPEM, pubPEM, err := GenerateRootKey(10 * 365 * 24 * time.Hour)
+	require.NoError(t, err)
+	assert.NotNil(t, rootKey)
+	assert.NotEmpty(t, privPEM)
+	assert.NotEmpty(t, pubPEM)
+
+	// Step 2: Parse the private key back
+	parsedRootKey, err := ParseRootKey(privPEM)
+	require.NoError(t, err)
+	assert.Equal(t, rootKey.Key, parsedRootKey.Key)
+	assert.Equal(t, rootKey.Metadata.ID, parsedRootKey.Metadata.ID)
+
+	// Step 3: Generate an artifact key using root key
+	artifactKey, _, artifactPubPEM, artifactSig, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+	assert.NotNil(t, artifactKey)
+
+	// Step 4: Verify the artifact key signature
+	pubKey, _, err := parsePublicKey(pubPEM, tagRootPublic)
+	require.NoError(t, err)
+
+	sig, err := ParseSignature(artifactSig)
+	require.NoError(t, err)
+
+	artifactPubKey, _, err := parsePublicKey(artifactPubPEM, tagArtifactPublic)
+	require.NoError(t, err)
+
+	// Reconstruct message - SignArtifactKey signs the PEM, not the JSON
+	msg := make([]byte, 0, len(artifactPubPEM)+8)
+	msg = append(msg, artifactPubPEM...)
+	msg = binary.LittleEndian.AppendUint64(msg, uint64(sig.Timestamp.Unix()))
+
+	// Verify with root public key
+	valid := ed25519.Verify(pubKey.Key, msg, sig.Signature)
+	assert.True(t, valid, "Artifact key signature should be valid")
+
+	// Step 5: Use artifact key to sign data
+	testData := []byte("This is test artifact data")
+	dataSig, err := SignData(*artifactKey, testData)
+	require.NoError(t, err)
+	assert.NotEmpty(t, dataSig)
+
+	// Step 6: Verify the artifact data signature
+	dataSigParsed, err := ParseSignature(dataSig)
+	require.NoError(t, err)
+
+	err = ValidateArtifact([]PublicKey{artifactPubKey}, testData, *dataSigParsed)
+	assert.NoError(t, err, "Artifact data signature should be valid")
+}
+
+func TestRootKey_ExpiredKeyWorkflow(t *testing.T) {
+	// Generate a root key that expires very soon
+	rootKey, _, _, err := GenerateRootKey(1 * time.Millisecond)
+	require.NoError(t, err)
+
+	// Wait for expiration
+	time.Sleep(10 * time.Millisecond)
+
+	// Try to generate artifact key with expired root key
+	_, _, _, _, err = GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "expired")
+}

client/internal/updatemanager/reposign/signature.go

@@ -0,0 +1,24 @@
+package reposign
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// Signature contains a signature with associated Metadata
+type Signature struct {
+	Signature []byte    `json:"signature"`
+	Timestamp time.Time `json:"timestamp"`
+	KeyID     KeyID     `json:"key_id"`
+	Algorithm string    `json:"algorithm"` // "ed25519"
+	HashAlgo  string    `json:"hash_algo"` // "blake2s" or sha512
+}
+
+func ParseSignature(data []byte) (*Signature, error) {
+	var signature Signature
+	if err := json.Unmarshal(data, &signature); err != nil {
+		return nil, err
+	}
+
+	return &signature, nil
+}

client/internal/updatemanager/reposign/signature_test.go

@@ -0,0 +1,277 @@
+package reposign
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseSignature_Valid(t *testing.T) {
+	timestamp := time.Date(2024, 1, 15, 10, 30, 0, 0, time.UTC)
+	keyID, err := ParseKeyID("0123456789abcdef")
+	require.NoError(t, err)
+
+	signatureData := []byte{0x01, 0x02, 0x03, 0x04}
+
+	jsonData, err := json.Marshal(Signature{
+		Signature: signatureData,
+		Timestamp: timestamp,
+		KeyID:     keyID,
+		Algorithm: "ed25519",
+		HashAlgo:  "blake2s",
+	})
+	require.NoError(t, err)
+
+	sig, err := ParseSignature(jsonData)
+	require.NoError(t, err)
+	assert.NotNil(t, sig)
+	assert.Equal(t, signatureData, sig.Signature)
+	assert.Equal(t, timestamp.Unix(), sig.Timestamp.Unix())
+	assert.Equal(t, keyID, sig.KeyID)
+	assert.Equal(t, "ed25519", sig.Algorithm)
+	assert.Equal(t, "blake2s", sig.HashAlgo)
+}
+
+func TestParseSignature_InvalidJSON(t *testing.T) {
+	invalidJSON := []byte(`{invalid json}`)
+
+	sig, err := ParseSignature(invalidJSON)
+	assert.Error(t, err)
+	assert.Nil(t, sig)
+}
+
+func TestParseSignature_EmptyData(t *testing.T) {
+	emptyJSON := []byte(`{}`)
+
+	sig, err := ParseSignature(emptyJSON)
+	require.NoError(t, err)
+	assert.NotNil(t, sig)
+	assert.Empty(t, sig.Signature)
+	assert.True(t, sig.Timestamp.IsZero())
+	assert.Equal(t, KeyID{}, sig.KeyID)
+	assert.Empty(t, sig.Algorithm)
+	assert.Empty(t, sig.HashAlgo)
+}
+
+func TestParseSignature_MissingFields(t *testing.T) {
+	// JSON with only some fields
+	partialJSON := []byte(`{
+		"signature": "AQIDBA==",
+		"algorithm": "ed25519"
+	}`)
+
+	sig, err := ParseSignature(partialJSON)
+	require.NoError(t, err)
+	assert.NotNil(t, sig)
+	assert.NotEmpty(t, sig.Signature)
+	assert.Equal(t, "ed25519", sig.Algorithm)
+	assert.True(t, sig.Timestamp.IsZero())
+}
+
+func TestSignature_MarshalUnmarshal_Roundtrip(t *testing.T) {
+	timestamp := time.Date(2024, 6, 20, 14, 45, 30, 0, time.UTC)
+	keyID, err := ParseKeyID("fedcba9876543210")
+	require.NoError(t, err)
+
+	original := Signature{
+		Signature: []byte{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe},
+		Timestamp: timestamp,
+		KeyID:     keyID,
+		Algorithm: "ed25519",
+		HashAlgo:  "sha512",
+	}
+
+	// Marshal
+	jsonData, err := json.Marshal(original)
+	require.NoError(t, err)
+
+	// Unmarshal
+	parsed, err := ParseSignature(jsonData)
+	require.NoError(t, err)
+
+	// Verify
+	assert.Equal(t, original.Signature, parsed.Signature)
+	assert.Equal(t, original.Timestamp.Unix(), parsed.Timestamp.Unix())
+	assert.Equal(t, original.KeyID, parsed.KeyID)
+	assert.Equal(t, original.Algorithm, parsed.Algorithm)
+	assert.Equal(t, original.HashAlgo, parsed.HashAlgo)
+}
+
+func TestSignature_NilSignatureBytes(t *testing.T) {
+	timestamp := time.Now().UTC()
+	keyID, err := ParseKeyID("0011223344556677")
+	require.NoError(t, err)
+
+	sig := Signature{
+		Signature: nil,
+		Timestamp: timestamp,
+		KeyID:     keyID,
+		Algorithm: "ed25519",
+		HashAlgo:  "blake2s",
+	}
+
+	jsonData, err := json.Marshal(sig)
+	require.NoError(t, err)
+
+	parsed, err := ParseSignature(jsonData)
+	require.NoError(t, err)
+	assert.Nil(t, parsed.Signature)
+}
+
+func TestSignature_LargeSignature(t *testing.T) {
+	timestamp := time.Now().UTC()
+	keyID, err := ParseKeyID("aabbccddeeff0011")
+	require.NoError(t, err)
+
+	// Create a large signature (64 bytes for ed25519)
+	largeSignature := make([]byte, 64)
+	for i := range largeSignature {
+		largeSignature[i] = byte(i)
+	}
+
+	sig := Signature{
+		Signature: largeSignature,
+		Timestamp: timestamp,
+		KeyID:     keyID,
+		Algorithm: "ed25519",
+		HashAlgo:  "blake2s",
+	}
+
+	jsonData, err := json.Marshal(sig)
+	require.NoError(t, err)
+
+	parsed, err := ParseSignature(jsonData)
+	require.NoError(t, err)
+	assert.Equal(t, largeSignature, parsed.Signature)
+}
+
+func TestSignature_WithDifferentHashAlgorithms(t *testing.T) {
+	tests := []struct {
+		name     string
+		hashAlgo string
+	}{
+		{"blake2s", "blake2s"},
+		{"sha512", "sha512"},
+		{"sha256", "sha256"},
+		{"empty", ""},
+	}
+
+	keyID, err := ParseKeyID("1122334455667788")
+	require.NoError(t, err)
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			sig := Signature{
+				Signature: []byte{0x01, 0x02},
+				Timestamp: time.Now().UTC(),
+				KeyID:     keyID,
+				Algorithm: "ed25519",
+				HashAlgo:  tt.hashAlgo,
+			}
+
+			jsonData, err := json.Marshal(sig)
+			require.NoError(t, err)
+
+			parsed, err := ParseSignature(jsonData)
+			require.NoError(t, err)
+			assert.Equal(t, tt.hashAlgo, parsed.HashAlgo)
+		})
+	}
+}
+
+func TestSignature_TimestampPrecision(t *testing.T) {
+	// Test that timestamp preserves precision through JSON marshaling
+	timestamp := time.Date(2024, 3, 15, 10, 30, 45, 123456789, time.UTC)
+	keyID, err := ParseKeyID("8877665544332211")
+	require.NoError(t, err)
+
+	sig := Signature{
+		Signature: []byte{0xaa, 0xbb},
+		Timestamp: timestamp,
+		KeyID:     keyID,
+		Algorithm: "ed25519",
+		HashAlgo:  "blake2s",
+	}
+
+	jsonData, err := json.Marshal(sig)
+	require.NoError(t, err)
+
+	parsed, err := ParseSignature(jsonData)
+	require.NoError(t, err)
+
+	// JSON timestamps typically have second or millisecond precision
+	// so we check that at least seconds match
+	assert.Equal(t, timestamp.Unix(), parsed.Timestamp.Unix())
+}
+
+func TestParseSignature_MalformedKeyID(t *testing.T) {
+	// Test with a malformed KeyID field
+	malformedJSON := []byte(`{
+		"signature": "AQID",
+		"timestamp": "2024-01-15T10:30:00Z",
+		"key_id": "invalid_keyid_format",
+		"algorithm": "ed25519",
+		"hash_algo": "blake2s"
+	}`)
+
+	// This should fail since "invalid_keyid_format" is not a valid KeyID
+	sig, err := ParseSignature(malformedJSON)
+	assert.Error(t, err)
+	assert.Nil(t, sig)
+}
+
+func TestParseSignature_InvalidTimestamp(t *testing.T) {
+	// Test with an invalid timestamp format
+	invalidTimestampJSON := []byte(`{
+		"signature": "AQID",
+		"timestamp": "not-a-timestamp",
+		"key_id": "0123456789abcdef",
+		"algorithm": "ed25519",
+		"hash_algo": "blake2s"
+	}`)
+
+	sig, err := ParseSignature(invalidTimestampJSON)
+	assert.Error(t, err)
+	assert.Nil(t, sig)
+}
+
+func TestSignature_ZeroKeyID(t *testing.T) {
+	// Test with a zero KeyID
+	sig := Signature{
+		Signature: []byte{0x01, 0x02, 0x03},
+		Timestamp: time.Now().UTC(),
+		KeyID:     KeyID{},
+		Algorithm: "ed25519",
+		HashAlgo:  "blake2s",
+	}
+
+	jsonData, err := json.Marshal(sig)
+	require.NoError(t, err)
+
+	parsed, err := ParseSignature(jsonData)
+	require.NoError(t, err)
+	assert.Equal(t, KeyID{}, parsed.KeyID)
+}
+
+func TestParseSignature_ExtraFields(t *testing.T) {
+	// JSON with extra fields that should be ignored
+	jsonWithExtra := []byte(`{
+		"signature": "AQIDBA==",
+		"timestamp": "2024-01-15T10:30:00Z",
+		"key_id": "0123456789abcdef",
+		"algorithm": "ed25519",
+		"hash_algo": "blake2s",
+		"extra_field": "should be ignored",
+		"another_extra": 12345
+	}`)
+
+	sig, err := ParseSignature(jsonWithExtra)
+	require.NoError(t, err)
+	assert.NotNil(t, sig)
+	assert.NotEmpty(t, sig.Signature)
+	assert.Equal(t, "ed25519", sig.Algorithm)
+	assert.Equal(t, "blake2s", sig.HashAlgo)
+}

client/internal/updatemanager/reposign/verify.go

@@ -0,0 +1,187 @@
+package reposign
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/downloader"
+)
+
+const (
+	artifactPubKeysFileName    = "artifact-key-pub.pem"
+	artifactPubKeysSigFileName = "artifact-key-pub.pem.sig"
+	revocationFileName         = "revocation-list.json"
+	revocationSignFileName     = "revocation-list.json.sig"
+
+	keySizeLimit    = 5 * 1024 * 1024 //5MB
+	signatureLimit  = 1024
+	revocationLimit = 10 * 1024 * 1024
+)
+
+type ArtifactVerify struct {
+	rootKeys    []PublicKey
+	keysBaseURL *url.URL
+
+	revocationList *RevocationList
+}
+
+func NewArtifactVerify(keysBaseURL string) (*ArtifactVerify, error) {
+	allKeys, err := loadEmbeddedPublicKeys()
+	if err != nil {
+		return nil, err
+	}
+
+	return newArtifactVerify(keysBaseURL, allKeys)
+}
+
+func newArtifactVerify(keysBaseURL string, allKeys []PublicKey) (*ArtifactVerify, error) {
+	ku, err := url.Parse(keysBaseURL)
+	if err != nil {
+		return nil, fmt.Errorf("invalid keys base URL %q: %v", keysBaseURL, err)
+	}
+
+	a := &ArtifactVerify{
+		rootKeys:    allKeys,
+		keysBaseURL: ku,
+	}
+	return a, nil
+}
+
+func (a *ArtifactVerify) Verify(ctx context.Context, version string, artifactFile string) error {
+	version = strings.TrimPrefix(version, "v")
+
+	revocationList, err := a.loadRevocationList(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to load revocation list: %v", err)
+	}
+	a.revocationList = revocationList
+
+	artifactPubKeys, err := a.loadArtifactKeys(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to load artifact keys: %v", err)
+	}
+
+	signature, err := a.loadArtifactSignature(ctx, version, artifactFile)
+	if err != nil {
+		return fmt.Errorf("failed to download signature file for: %s, %v", filepath.Base(artifactFile), err)
+	}
+
+	artifactData, err := os.ReadFile(artifactFile)
+	if err != nil {
+		log.Errorf("failed to read artifact file: %v", err)
+		return fmt.Errorf("failed to read artifact file: %w", err)
+	}
+
+	if err := ValidateArtifact(artifactPubKeys, artifactData, *signature); err != nil {
+		return fmt.Errorf("failed to validate artifact: %v", err)
+	}
+
+	return nil
+}
+
+func (a *ArtifactVerify) loadRevocationList(ctx context.Context) (*RevocationList, error) {
+	downloadURL := a.keysBaseURL.JoinPath("keys", revocationFileName).String()
+	data, err := downloader.DownloadToMemory(ctx, downloadURL, revocationLimit)
+	if err != nil {
+		log.Debugf("failed to download revocation list '%s': %s", downloadURL, err)
+		return nil, err
+	}
+
+	downloadURL = a.keysBaseURL.JoinPath("keys", revocationSignFileName).String()
+	sigData, err := downloader.DownloadToMemory(ctx, downloadURL, signatureLimit)
+	if err != nil {
+		log.Debugf("failed to download revocation list '%s': %s", downloadURL, err)
+		return nil, err
+	}
+
+	signature, err := ParseSignature(sigData)
+	if err != nil {
+		log.Debugf("failed to parse revocation list signature: %s", err)
+		return nil, err
+	}
+
+	return ValidateRevocationList(a.rootKeys, data, *signature)
+}
+
+func (a *ArtifactVerify) loadArtifactKeys(ctx context.Context) ([]PublicKey, error) {
+	downloadURL := a.keysBaseURL.JoinPath("keys", artifactPubKeysFileName).String()
+	log.Debugf("starting downloading artifact keys from: %s", downloadURL)
+	data, err := downloader.DownloadToMemory(ctx, downloadURL, keySizeLimit)
+	if err != nil {
+		log.Debugf("failed to download artifact keys: %s", err)
+		return nil, err
+	}
+
+	downloadURL = a.keysBaseURL.JoinPath("keys", artifactPubKeysSigFileName).String()
+	log.Debugf("start downloading signature of artifact pub key from: %s", downloadURL)
+	sigData, err := downloader.DownloadToMemory(ctx, downloadURL, signatureLimit)
+	if err != nil {
+		log.Debugf("failed to download signature of public keys: %s", err)
+		return nil, err
+	}
+
+	signature, err := ParseSignature(sigData)
+	if err != nil {
+		log.Debugf("failed to parse signature of public keys: %s", err)
+		return nil, err
+	}
+
+	return ValidateArtifactKeys(a.rootKeys, data, *signature, a.revocationList)
+}
+
+func (a *ArtifactVerify) loadArtifactSignature(ctx context.Context, version string, artifactFile string) (*Signature, error) {
+	artifactFile = filepath.Base(artifactFile)
+	downloadURL := a.keysBaseURL.JoinPath("tag", "v"+version, artifactFile+".sig").String()
+	data, err := downloader.DownloadToMemory(ctx, downloadURL, signatureLimit)
+	if err != nil {
+		log.Debugf("failed to download artifact signature: %s", err)
+		return nil, err
+	}
+
+	signature, err := ParseSignature(data)
+	if err != nil {
+		log.Debugf("failed to parse artifact signature: %s", err)
+		return nil, err
+	}
+
+	return signature, nil
+
+}
+
+func loadEmbeddedPublicKeys() ([]PublicKey, error) {
+	files, err := embeddedCerts.ReadDir(embeddedCertsDir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read embedded certs: %w", err)
+	}
+
+	var allKeys []PublicKey
+	for _, file := range files {
+		if file.IsDir() {
+			continue
+		}
+
+		data, err := embeddedCerts.ReadFile(embeddedCertsDir + "/" + file.Name())
+		if err != nil {
+			return nil, fmt.Errorf("failed to read cert file %s: %w", file.Name(), err)
+		}
+
+		keys, err := parsePublicKeyBundle(data, tagRootPublic)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse cert %s: %w", file.Name(), err)
+		}
+
+		allKeys = append(allKeys, keys...)
+	}
+
+	if len(allKeys) == 0 {
+		return nil, fmt.Errorf("no valid public keys found in embedded certs")
+	}
+
+	return allKeys, nil
+}

client/internal/updatemanager/reposign/verify_test.go

@@ -0,0 +1,528 @@
+package reposign
+
+import (
+	"context"
+	"crypto/ed25519"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Test ArtifactVerify construction
+
+func TestArtifactVerify_Construction(t *testing.T) {
+	// Generate test root key
+	rootKey, _, rootPubPEM, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	rootPubKey, _, err := parsePublicKey(rootPubPEM, tagRootPublic)
+	require.NoError(t, err)
+
+	keysBaseURL := "http://localhost:8080/artifact-signatures"
+
+	av, err := newArtifactVerify(keysBaseURL, []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	assert.NotNil(t, av)
+	assert.NotEmpty(t, av.rootKeys)
+	assert.Equal(t, keysBaseURL, av.keysBaseURL.String())
+
+	// Verify root key structure
+	assert.NotEmpty(t, av.rootKeys[0].Key)
+	assert.Equal(t, rootKey.Metadata.ID, av.rootKeys[0].Metadata.ID)
+	assert.False(t, av.rootKeys[0].Metadata.CreatedAt.IsZero())
+}
+
+func TestArtifactVerify_MultipleRootKeys(t *testing.T) {
+	// Generate multiple test root keys
+	rootKey1, _, rootPubPEM1, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+	rootPubKey1, _, err := parsePublicKey(rootPubPEM1, tagRootPublic)
+	require.NoError(t, err)
+
+	rootKey2, _, rootPubPEM2, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+	rootPubKey2, _, err := parsePublicKey(rootPubPEM2, tagRootPublic)
+	require.NoError(t, err)
+
+	keysBaseURL := "http://localhost:8080/artifact-signatures"
+
+	av, err := newArtifactVerify(keysBaseURL, []PublicKey{rootPubKey1, rootPubKey2})
+	assert.NoError(t, err)
+	assert.Len(t, av.rootKeys, 2)
+	assert.NotEqual(t, rootKey1.Metadata.ID, rootKey2.Metadata.ID)
+}
+
+// Test Verify workflow with mock HTTP server
+
+func TestArtifactVerify_FullWorkflow(t *testing.T) {
+	// Create temporary test directory
+	tempDir := t.TempDir()
+
+	// Step 1: Generate root key
+	rootKey, _, _, err := GenerateRootKey(10 * 365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Step 2: Generate artifact key
+	artifactKey, _, artifactPubPEM, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+
+	artifactPubKey, err := ParseArtifactPubKey(artifactPubPEM)
+	require.NoError(t, err)
+
+	// Step 3: Create revocation list
+	revocationData, revocationSig, err := CreateRevocationList(*rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Step 4: Bundle artifact keys
+	artifactKeysBundle, artifactKeysSig, err := BundleArtifactKeys(rootKey, []PublicKey{artifactPubKey})
+	require.NoError(t, err)
+
+	// Step 5: Create test artifact
+	artifactPath := filepath.Join(tempDir, "test-artifact.bin")
+	artifactData := []byte("This is test artifact data for verification")
+	err = os.WriteFile(artifactPath, artifactData, 0644)
+	require.NoError(t, err)
+
+	// Step 6: Sign artifact
+	artifactSigData, err := SignData(*artifactKey, artifactData)
+	require.NoError(t, err)
+
+	// Step 7: Setup mock HTTP server
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/artifact-signatures/keys/" + revocationFileName:
+			_, _ = w.Write(revocationData)
+		case "/artifact-signatures/keys/" + revocationSignFileName:
+			_, _ = w.Write(revocationSig)
+		case "/artifact-signatures/keys/" + artifactPubKeysFileName:
+			_, _ = w.Write(artifactKeysBundle)
+		case "/artifact-signatures/keys/" + artifactPubKeysSigFileName:
+			_, _ = w.Write(artifactKeysSig)
+		case "/artifacts/v1.0.0/test-artifact.bin":
+			_, _ = w.Write(artifactData)
+		case "/artifact-signatures/tag/v1.0.0/test-artifact.bin.sig":
+			_, _ = w.Write(artifactSigData)
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	// Step 8: Create ArtifactVerify with test root key
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	av, err := newArtifactVerify(server.URL+"/artifact-signatures", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	// Step 9: Verify artifact
+	ctx := context.Background()
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	assert.NoError(t, err)
+}
+
+func TestArtifactVerify_InvalidRevocationList(t *testing.T) {
+	tempDir := t.TempDir()
+	artifactPath := filepath.Join(tempDir, "test.bin")
+	err := os.WriteFile(artifactPath, []byte("test"), 0644)
+	require.NoError(t, err)
+
+	// Setup server with invalid revocation list
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/artifact-signatures/keys/" + revocationFileName:
+			_, _ = w.Write([]byte("invalid data"))
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	av, err := newArtifactVerify(server.URL+"/artifact-signatures", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	ctx := context.Background()
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to load revocation list")
+}
+
+func TestArtifactVerify_MissingArtifactFile(t *testing.T) {
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	// Create revocation list
+	revocationData, revocationSig, err := CreateRevocationList(*rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	artifactKey, _, artifactPubPEM, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+
+	artifactPubKey, err := ParseArtifactPubKey(artifactPubPEM)
+	require.NoError(t, err)
+
+	artifactKeysBundle, artifactKeysSig, err := BundleArtifactKeys(rootKey, []PublicKey{artifactPubKey})
+	require.NoError(t, err)
+
+	// Create signature for non-existent file
+	testData := []byte("test")
+	artifactSigData, err := SignData(*artifactKey, testData)
+	require.NoError(t, err)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/artifact-signatures/keys/" + revocationFileName:
+			_, _ = w.Write(revocationData)
+		case "/artifact-signatures/keys/" + revocationSignFileName:
+			_, _ = w.Write(revocationSig)
+		case "/artifact-signatures/keys/" + artifactPubKeysFileName:
+			_, _ = w.Write(artifactKeysBundle)
+		case "/artifact-signatures/keys/" + artifactPubKeysSigFileName:
+			_, _ = w.Write(artifactKeysSig)
+		case "/artifact-signatures/tag/v1.0.0/missing.bin.sig":
+			_, _ = w.Write(artifactSigData)
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	av, err := newArtifactVerify(server.URL+"/artifact-signatures", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	ctx := context.Background()
+	err = av.Verify(ctx, "1.0.0", "file.bin")
+	assert.Error(t, err)
+}
+
+func TestArtifactVerify_ServerUnavailable(t *testing.T) {
+	tempDir := t.TempDir()
+	artifactPath := filepath.Join(tempDir, "test.bin")
+	err := os.WriteFile(artifactPath, []byte("test"), 0644)
+	require.NoError(t, err)
+
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	// Use URL that doesn't exist
+	av, err := newArtifactVerify("http://localhost:19999/keys", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	assert.Error(t, err)
+}
+
+func TestArtifactVerify_ContextCancellation(t *testing.T) {
+	tempDir := t.TempDir()
+	artifactPath := filepath.Join(tempDir, "test.bin")
+	err := os.WriteFile(artifactPath, []byte("test"), 0644)
+	require.NoError(t, err)
+
+	// Create a server that delays response
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		time.Sleep(500 * time.Millisecond)
+		_, _ = w.Write([]byte("data"))
+	}))
+	defer server.Close()
+
+	rootKey, _, _, err := GenerateRootKey(365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	av, err := newArtifactVerify(server.URL, []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	// Create context that cancels quickly
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
+	defer cancel()
+
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	assert.Error(t, err)
+}
+
+func TestArtifactVerify_WithRevocation(t *testing.T) {
+	tempDir := t.TempDir()
+
+	// Generate root key
+	rootKey, _, _, err := GenerateRootKey(10 * 365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Generate two artifact keys
+	artifactKey1, _, artifactPubPEM1, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+	artifactPubKey1, err := ParseArtifactPubKey(artifactPubPEM1)
+	require.NoError(t, err)
+
+	_, _, artifactPubPEM2, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+	artifactPubKey2, err := ParseArtifactPubKey(artifactPubPEM2)
+	require.NoError(t, err)
+
+	// Create revocation list with first key revoked
+	emptyRevocation, _, err := CreateRevocationList(*rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	parsedRevocation, err := ParseRevocationList(emptyRevocation)
+	require.NoError(t, err)
+
+	revocationData, revocationSig, err := ExtendRevocationList(*rootKey, *parsedRevocation, artifactPubKey1.Metadata.ID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Bundle both keys
+	artifactKeysBundle, artifactKeysSig, err := BundleArtifactKeys(rootKey, []PublicKey{artifactPubKey1, artifactPubKey2})
+	require.NoError(t, err)
+
+	// Create artifact signed by revoked key
+	artifactPath := filepath.Join(tempDir, "test.bin")
+	artifactData := []byte("test data")
+	err = os.WriteFile(artifactPath, artifactData, 0644)
+	require.NoError(t, err)
+
+	artifactSigData, err := SignData(*artifactKey1, artifactData)
+	require.NoError(t, err)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/artifact-signatures/keys/" + revocationFileName:
+			_, _ = w.Write(revocationData)
+		case "/artifact-signatures/keys/" + revocationSignFileName:
+			_, _ = w.Write(revocationSig)
+		case "/artifact-signatures/keys/" + artifactPubKeysFileName:
+			_, _ = w.Write(artifactKeysBundle)
+		case "/artifact-signatures/keys/" + artifactPubKeysSigFileName:
+			_, _ = w.Write(artifactKeysSig)
+		case "/artifact-signatures/tag/v1.0.0/test.bin.sig":
+			_, _ = w.Write(artifactSigData)
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	av, err := newArtifactVerify(server.URL+"/artifact-signatures", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	ctx := context.Background()
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	// Should fail because the signing key is revoked
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "no signing Key found")
+}
+
+func TestArtifactVerify_ValidWithSecondKey(t *testing.T) {
+	tempDir := t.TempDir()
+
+	// Generate root key
+	rootKey, _, _, err := GenerateRootKey(10 * 365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	// Generate two artifact keys
+	_, _, artifactPubPEM1, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+	artifactPubKey1, err := ParseArtifactPubKey(artifactPubPEM1)
+	require.NoError(t, err)
+
+	artifactKey2, _, artifactPubPEM2, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+	artifactPubKey2, err := ParseArtifactPubKey(artifactPubPEM2)
+	require.NoError(t, err)
+
+	// Create revocation list with first key revoked
+	emptyRevocation, _, err := CreateRevocationList(*rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	parsedRevocation, err := ParseRevocationList(emptyRevocation)
+	require.NoError(t, err)
+
+	revocationData, revocationSig, err := ExtendRevocationList(*rootKey, *parsedRevocation, artifactPubKey1.Metadata.ID, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Bundle both keys
+	artifactKeysBundle, artifactKeysSig, err := BundleArtifactKeys(rootKey, []PublicKey{artifactPubKey1, artifactPubKey2})
+	require.NoError(t, err)
+
+	// Create artifact signed by second key (not revoked)
+	artifactPath := filepath.Join(tempDir, "test.bin")
+	artifactData := []byte("test data")
+	err = os.WriteFile(artifactPath, artifactData, 0644)
+	require.NoError(t, err)
+
+	artifactSigData, err := SignData(*artifactKey2, artifactData)
+	require.NoError(t, err)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/artifact-signatures/keys/" + revocationFileName:
+			_, _ = w.Write(revocationData)
+		case "/artifact-signatures/keys/" + revocationSignFileName:
+			_, _ = w.Write(revocationSig)
+		case "/artifact-signatures/keys/" + artifactPubKeysFileName:
+			_, _ = w.Write(artifactKeysBundle)
+		case "/artifact-signatures/keys/" + artifactPubKeysSigFileName:
+			_, _ = w.Write(artifactKeysSig)
+		case "/artifact-signatures/tag/v1.0.0/test.bin.sig":
+			_, _ = w.Write(artifactSigData)
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	av, err := newArtifactVerify(server.URL+"/artifact-signatures", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	ctx := context.Background()
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	// Should succeed because second key is not revoked
+	assert.NoError(t, err)
+}
+
+func TestArtifactVerify_TamperedArtifact(t *testing.T) {
+	tempDir := t.TempDir()
+
+	// Generate root key and artifact key
+	rootKey, _, _, err := GenerateRootKey(10 * 365 * 24 * time.Hour)
+	require.NoError(t, err)
+
+	artifactKey, _, artifactPubPEM, _, err := GenerateArtifactKey(rootKey, 30*24*time.Hour)
+	require.NoError(t, err)
+	artifactPubKey, err := ParseArtifactPubKey(artifactPubPEM)
+	require.NoError(t, err)
+
+	// Create revocation list
+	revocationData, revocationSig, err := CreateRevocationList(*rootKey, defaultRevocationListExpiration)
+	require.NoError(t, err)
+
+	// Bundle keys
+	artifactKeysBundle, artifactKeysSig, err := BundleArtifactKeys(rootKey, []PublicKey{artifactPubKey})
+	require.NoError(t, err)
+
+	// Sign original data
+	originalData := []byte("original data")
+	artifactSigData, err := SignData(*artifactKey, originalData)
+	require.NoError(t, err)
+
+	// Write tampered data to file
+	artifactPath := filepath.Join(tempDir, "test.bin")
+	tamperedData := []byte("tampered data")
+	err = os.WriteFile(artifactPath, tamperedData, 0644)
+	require.NoError(t, err)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/artifact-signatures/keys/" + revocationFileName:
+			_, _ = w.Write(revocationData)
+		case "/artifact-signatures/keys/" + revocationSignFileName:
+			_, _ = w.Write(revocationSig)
+		case "/artifact-signatures/keys/" + artifactPubKeysFileName:
+			_, _ = w.Write(artifactKeysBundle)
+		case "/artifact-signatures/keys/" + artifactPubKeysSigFileName:
+			_, _ = w.Write(artifactKeysSig)
+		case "/artifact-signatures/tag/v1.0.0/test.bin.sig":
+			_, _ = w.Write(artifactSigData)
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	rootPubKey := PublicKey{
+		Key:      rootKey.Key.Public().(ed25519.PublicKey),
+		Metadata: rootKey.Metadata,
+	}
+
+	av, err := newArtifactVerify(server.URL+"/artifact-signatures", []PublicKey{rootPubKey})
+	require.NoError(t, err)
+
+	ctx := context.Background()
+	err = av.Verify(ctx, "1.0.0", artifactPath)
+	// Should fail because artifact was tampered
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to validate artifact")
+}
+
+// Test URL validation
+
+func TestArtifactVerify_URLParsing(t *testing.T) {
+	tests := []struct {
+		name        string
+		keysBaseURL string
+		expectError bool
+	}{
+		{
+			name:        "Valid HTTP URL",
+			keysBaseURL: "http://example.com/artifact-signatures",
+			expectError: false,
+		},
+		{
+			name:        "Valid HTTPS URL",
+			keysBaseURL: "https://example.com/artifact-signatures",
+			expectError: false,
+		},
+		{
+			name:        "URL with port",
+			keysBaseURL: "http://localhost:8080/artifact-signatures",
+			expectError: false,
+		},
+		{
+			name:        "Invalid URL",
+			keysBaseURL: "://invalid",
+			expectError: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := newArtifactVerify(tt.keysBaseURL, nil)
+			if tt.expectError {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}

client/internal/updatemanager/update.go

@@ -0,0 +1,11 @@
+package updatemanager
+
+import v "github.com/hashicorp/go-version"
+
+type UpdateInterface interface {
+	StopWatch()
+	SetDaemonVersion(newVersion string) bool
+	SetOnUpdateListener(updateFn func())
+	LatestVersion() *v.Version
+	StartFetcher()
+}

client/ios/NetBirdSDK/client.go

@@ -131,7 +131,7 @@ func (c *Client) Run(fd int32, interfaceName string, envList *EnvList) error {
 	c.onHostDnsFn = func([]string) {}
 	cfg.WgIface = interfaceName
 
-	c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder)
+	c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder, false)
 	return c.connectClient.RunOniOS(fd, c.networkChangeListener, c.dnsManager, c.stateFile)
 }
 

client/netbird.wxs

@@ -51,7 +51,7 @@
 		</ComponentGroup>
 
 		<util:CloseApplication Id="CloseNetBird" CloseMessage="no" Target="netbird.exe" RebootPrompt="no" />
-		<util:CloseApplication Id="CloseNetBirdUI" CloseMessage="no" Target="netbird-ui.exe" RebootPrompt="no" />
+		<util:CloseApplication Id="CloseNetBirdUI" CloseMessage="no" Target="netbird-ui.exe" RebootPrompt="no" TerminateProcess="0" />
 
 
 

client/proto/daemon.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.6
-// 	protoc        v6.32.1
+// 	protoc        v3.21.12
 // source: daemon.proto
 
 package proto
@@ -893,6 +893,7 @@ type UpRequest struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ProfileName   *string                `protobuf:"bytes,1,opt,name=profileName,proto3,oneof" json:"profileName,omitempty"`
 	Username      *string                `protobuf:"bytes,2,opt,name=username,proto3,oneof" json:"username,omitempty"`
+	AutoUpdate    *bool                  `protobuf:"varint,3,opt,name=autoUpdate,proto3,oneof" json:"autoUpdate,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -941,6 +942,13 @@ func (x *UpRequest) GetUsername() string {
 	return ""
 }
 
+func (x *UpRequest) GetAutoUpdate() bool {
+	if x != nil && x.AutoUpdate != nil {
+		return *x.AutoUpdate
+	}
+	return false
+}
+
 type UpResponse struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	unknownFields protoimpl.UnknownFields
@@ -5356,6 +5364,94 @@ func (x *WaitJWTTokenResponse) GetExpiresIn() int64 {
 	return 0
 }
 
+type InstallerResultRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *InstallerResultRequest) Reset() {
+	*x = InstallerResultRequest{}
+	mi := &file_daemon_proto_msgTypes[79]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *InstallerResultRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*InstallerResultRequest) ProtoMessage() {}
+
+func (x *InstallerResultRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_daemon_proto_msgTypes[79]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use InstallerResultRequest.ProtoReflect.Descriptor instead.
+func (*InstallerResultRequest) Descriptor() ([]byte, []int) {
+	return file_daemon_proto_rawDescGZIP(), []int{79}
+}
+
+type InstallerResultResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Success       bool                   `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	ErrorMsg      string                 `protobuf:"bytes,2,opt,name=errorMsg,proto3" json:"errorMsg,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *InstallerResultResponse) Reset() {
+	*x = InstallerResultResponse{}
+	mi := &file_daemon_proto_msgTypes[80]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *InstallerResultResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*InstallerResultResponse) ProtoMessage() {}
+
+func (x *InstallerResultResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_daemon_proto_msgTypes[80]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use InstallerResultResponse.ProtoReflect.Descriptor instead.
+func (*InstallerResultResponse) Descriptor() ([]byte, []int) {
+	return file_daemon_proto_rawDescGZIP(), []int{80}
+}
+
+func (x *InstallerResultResponse) GetSuccess() bool {
+	if x != nil {
+		return x.Success
+	}
+	return false
+}
+
+func (x *InstallerResultResponse) GetErrorMsg() string {
+	if x != nil {
+		return x.ErrorMsg
+	}
+	return ""
+}
+
 type PortInfo_Range struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Start         uint32                 `protobuf:"varint,1,opt,name=start,proto3" json:"start,omitempty"`
@@ -5366,7 +5462,7 @@ type PortInfo_Range struct {
 
 func (x *PortInfo_Range) Reset() {
 	*x = PortInfo_Range{}
-	mi := &file_daemon_proto_msgTypes[80]
+	mi := &file_daemon_proto_msgTypes[82]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5378,7 +5474,7 @@ func (x *PortInfo_Range) String() string {
 func (*PortInfo_Range) ProtoMessage() {}
 
 func (x *PortInfo_Range) ProtoReflect() protoreflect.Message {
-	mi := &file_daemon_proto_msgTypes[80]
+	mi := &file_daemon_proto_msgTypes[82]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5502,12 +5598,16 @@ const file_daemon_proto_rawDesc = "" +
 	"\buserCode\x18\x01 \x01(\tR\buserCode\x12\x1a\n" +
 	"\bhostname\x18\x02 \x01(\tR\bhostname\",\n" +
 	"\x14WaitSSOLoginResponse\x12\x14\n" +
-	"\x05email\x18\x01 \x01(\tR\x05email\"p\n" +
+	"\x05email\x18\x01 \x01(\tR\x05email\"\xa4\x01\n" +
 	"\tUpRequest\x12%\n" +
 	"\vprofileName\x18\x01 \x01(\tH\x00R\vprofileName\x88\x01\x01\x12\x1f\n" +
-	"\busername\x18\x02 \x01(\tH\x01R\busername\x88\x01\x01B\x0e\n" +
+	"\busername\x18\x02 \x01(\tH\x01R\busername\x88\x01\x01\x12#\n" +
+	"\n" +
+	"autoUpdate\x18\x03 \x01(\bH\x02R\n" +
+	"autoUpdate\x88\x01\x01B\x0e\n" +
 	"\f_profileNameB\v\n" +
-	"\t_username\"\f\n" +
+	"\t_usernameB\r\n" +
+	"\v_autoUpdate\"\f\n" +
 	"\n" +
 	"UpResponse\"\xa1\x01\n" +
 	"\rStatusRequest\x12,\n" +
@@ -5893,7 +5993,11 @@ const file_daemon_proto_rawDesc = "" +
 	"\x14WaitJWTTokenResponse\x12\x14\n" +
 	"\x05token\x18\x01 \x01(\tR\x05token\x12\x1c\n" +
 	"\ttokenType\x18\x02 \x01(\tR\ttokenType\x12\x1c\n" +
-	"\texpiresIn\x18\x03 \x01(\x03R\texpiresIn*b\n" +
+	"\texpiresIn\x18\x03 \x01(\x03R\texpiresIn\"\x18\n" +
+	"\x16InstallerResultRequest\"O\n" +
+	"\x17InstallerResultResponse\x12\x18\n" +
+	"\asuccess\x18\x01 \x01(\bR\asuccess\x12\x1a\n" +
+	"\berrorMsg\x18\x02 \x01(\tR\berrorMsg*b\n" +
 	"\bLogLevel\x12\v\n" +
 	"\aUNKNOWN\x10\x00\x12\t\n" +
 	"\x05PANIC\x10\x01\x12\t\n" +
@@ -5902,7 +6006,7 @@ const file_daemon_proto_rawDesc = "" +
 	"\x04WARN\x10\x04\x12\b\n" +
 	"\x04INFO\x10\x05\x12\t\n" +
 	"\x05DEBUG\x10\x06\x12\t\n" +
-	"\x05TRACE\x10\a2\xdb\x12\n" +
+	"\x05TRACE\x10\a2\xb4\x13\n" +
 	"\rDaemonService\x126\n" +
 	"\x05Login\x12\x14.daemon.LoginRequest\x1a\x15.daemon.LoginResponse\"\x00\x12K\n" +
 	"\fWaitSSOLogin\x12\x1b.daemon.WaitSSOLoginRequest\x1a\x1c.daemon.WaitSSOLoginResponse\"\x00\x12-\n" +
@@ -5938,7 +6042,8 @@ const file_daemon_proto_rawDesc = "" +
 	"\x11GetPeerSSHHostKey\x12 .daemon.GetPeerSSHHostKeyRequest\x1a!.daemon.GetPeerSSHHostKeyResponse\"\x00\x12Q\n" +
 	"\x0eRequestJWTAuth\x12\x1d.daemon.RequestJWTAuthRequest\x1a\x1e.daemon.RequestJWTAuthResponse\"\x00\x12K\n" +
 	"\fWaitJWTToken\x12\x1b.daemon.WaitJWTTokenRequest\x1a\x1c.daemon.WaitJWTTokenResponse\"\x00\x12N\n" +
-	"\x11NotifyOSLifecycle\x12\x1a.daemon.OSLifecycleRequest\x1a\x1b.daemon.OSLifecycleResponse\"\x00B\bZ\x06/protob\x06proto3"
+	"\x11NotifyOSLifecycle\x12\x1a.daemon.OSLifecycleRequest\x1a\x1b.daemon.OSLifecycleResponse\"\x00\x12W\n" +
+	"\x12GetInstallerResult\x12\x1e.daemon.InstallerResultRequest\x1a\x1f.daemon.InstallerResultResponse\"\x00B\bZ\x06/protob\x06proto3"
 
 var (
 	file_daemon_proto_rawDescOnce sync.Once
@@ -5953,7 +6058,7 @@ func file_daemon_proto_rawDescGZIP() []byte {
 }
 
 var file_daemon_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
-var file_daemon_proto_msgTypes = make([]protoimpl.MessageInfo, 82)
+var file_daemon_proto_msgTypes = make([]protoimpl.MessageInfo, 84)
 var file_daemon_proto_goTypes = []any{
 	(LogLevel)(0),                              // 0: daemon.LogLevel
 	(OSLifecycleRequest_CycleType)(0),          // 1: daemon.OSLifecycleRequest.CycleType
@@ -6038,19 +6143,21 @@ var file_daemon_proto_goTypes = []any{
 	(*RequestJWTAuthResponse)(nil),             // 80: daemon.RequestJWTAuthResponse
 	(*WaitJWTTokenRequest)(nil),                // 81: daemon.WaitJWTTokenRequest
 	(*WaitJWTTokenResponse)(nil),               // 82: daemon.WaitJWTTokenResponse
-	nil,                                        // 83: daemon.Network.ResolvedIPsEntry
-	(*PortInfo_Range)(nil),                     // 84: daemon.PortInfo.Range
-	nil,                                        // 85: daemon.SystemEvent.MetadataEntry
-	(*durationpb.Duration)(nil),                // 86: google.protobuf.Duration
-	(*timestamppb.Timestamp)(nil),              // 87: google.protobuf.Timestamp
+	(*InstallerResultRequest)(nil),             // 83: daemon.InstallerResultRequest
+	(*InstallerResultResponse)(nil),            // 84: daemon.InstallerResultResponse
+	nil,                                        // 85: daemon.Network.ResolvedIPsEntry
+	(*PortInfo_Range)(nil),                     // 86: daemon.PortInfo.Range
+	nil,                                        // 87: daemon.SystemEvent.MetadataEntry
+	(*durationpb.Duration)(nil),                // 88: google.protobuf.Duration
+	(*timestamppb.Timestamp)(nil),              // 89: google.protobuf.Timestamp
 }
 var file_daemon_proto_depIdxs = []int32{
 	1,  // 0: daemon.OSLifecycleRequest.type:type_name -> daemon.OSLifecycleRequest.CycleType
-	86, // 1: daemon.LoginRequest.dnsRouteInterval:type_name -> google.protobuf.Duration
+	88, // 1: daemon.LoginRequest.dnsRouteInterval:type_name -> google.protobuf.Duration
 	27, // 2: daemon.StatusResponse.fullStatus:type_name -> daemon.FullStatus
-	87, // 3: daemon.PeerState.connStatusUpdate:type_name -> google.protobuf.Timestamp
-	87, // 4: daemon.PeerState.lastWireguardHandshake:type_name -> google.protobuf.Timestamp
-	86, // 5: daemon.PeerState.latency:type_name -> google.protobuf.Duration
+	89, // 3: daemon.PeerState.connStatusUpdate:type_name -> google.protobuf.Timestamp
+	89, // 4: daemon.PeerState.lastWireguardHandshake:type_name -> google.protobuf.Timestamp
+	88, // 5: daemon.PeerState.latency:type_name -> google.protobuf.Duration
 	25, // 6: daemon.SSHServerState.sessions:type_name -> daemon.SSHSessionInfo
 	22, // 7: daemon.FullStatus.managementState:type_name -> daemon.ManagementState
 	21, // 8: daemon.FullStatus.signalState:type_name -> daemon.SignalState
@@ -6061,8 +6168,8 @@ var file_daemon_proto_depIdxs = []int32{
 	57, // 13: daemon.FullStatus.events:type_name -> daemon.SystemEvent
 	26, // 14: daemon.FullStatus.sshServerState:type_name -> daemon.SSHServerState
 	33, // 15: daemon.ListNetworksResponse.routes:type_name -> daemon.Network
-	83, // 16: daemon.Network.resolvedIPs:type_name -> daemon.Network.ResolvedIPsEntry
-	84, // 17: daemon.PortInfo.range:type_name -> daemon.PortInfo.Range
+	85, // 16: daemon.Network.resolvedIPs:type_name -> daemon.Network.ResolvedIPsEntry
+	86, // 17: daemon.PortInfo.range:type_name -> daemon.PortInfo.Range
 	34, // 18: daemon.ForwardingRule.destinationPort:type_name -> daemon.PortInfo
 	34, // 19: daemon.ForwardingRule.translatedPort:type_name -> daemon.PortInfo
 	35, // 20: daemon.ForwardingRulesResponse.rules:type_name -> daemon.ForwardingRule
@@ -6073,10 +6180,10 @@ var file_daemon_proto_depIdxs = []int32{
 	54, // 25: daemon.TracePacketResponse.stages:type_name -> daemon.TraceStage
 	2,  // 26: daemon.SystemEvent.severity:type_name -> daemon.SystemEvent.Severity
 	3,  // 27: daemon.SystemEvent.category:type_name -> daemon.SystemEvent.Category
-	87, // 28: daemon.SystemEvent.timestamp:type_name -> google.protobuf.Timestamp
-	85, // 29: daemon.SystemEvent.metadata:type_name -> daemon.SystemEvent.MetadataEntry
+	89, // 28: daemon.SystemEvent.timestamp:type_name -> google.protobuf.Timestamp
+	87, // 29: daemon.SystemEvent.metadata:type_name -> daemon.SystemEvent.MetadataEntry
 	57, // 30: daemon.GetEventsResponse.events:type_name -> daemon.SystemEvent
-	86, // 31: daemon.SetConfigRequest.dnsRouteInterval:type_name -> google.protobuf.Duration
+	88, // 31: daemon.SetConfigRequest.dnsRouteInterval:type_name -> google.protobuf.Duration
 	70, // 32: daemon.ListProfilesResponse.profiles:type_name -> daemon.Profile
 	32, // 33: daemon.Network.ResolvedIPsEntry.value:type_name -> daemon.IPList
 	7,  // 34: daemon.DaemonService.Login:input_type -> daemon.LoginRequest
@@ -6111,40 +6218,42 @@ var file_daemon_proto_depIdxs = []int32{
 	79, // 63: daemon.DaemonService.RequestJWTAuth:input_type -> daemon.RequestJWTAuthRequest
 	81, // 64: daemon.DaemonService.WaitJWTToken:input_type -> daemon.WaitJWTTokenRequest
 	5,  // 65: daemon.DaemonService.NotifyOSLifecycle:input_type -> daemon.OSLifecycleRequest
-	8,  // 66: daemon.DaemonService.Login:output_type -> daemon.LoginResponse
-	10, // 67: daemon.DaemonService.WaitSSOLogin:output_type -> daemon.WaitSSOLoginResponse
-	12, // 68: daemon.DaemonService.Up:output_type -> daemon.UpResponse
-	14, // 69: daemon.DaemonService.Status:output_type -> daemon.StatusResponse
-	16, // 70: daemon.DaemonService.Down:output_type -> daemon.DownResponse
-	18, // 71: daemon.DaemonService.GetConfig:output_type -> daemon.GetConfigResponse
-	29, // 72: daemon.DaemonService.ListNetworks:output_type -> daemon.ListNetworksResponse
-	31, // 73: daemon.DaemonService.SelectNetworks:output_type -> daemon.SelectNetworksResponse
-	31, // 74: daemon.DaemonService.DeselectNetworks:output_type -> daemon.SelectNetworksResponse
-	36, // 75: daemon.DaemonService.ForwardingRules:output_type -> daemon.ForwardingRulesResponse
-	38, // 76: daemon.DaemonService.DebugBundle:output_type -> daemon.DebugBundleResponse
-	40, // 77: daemon.DaemonService.GetLogLevel:output_type -> daemon.GetLogLevelResponse
-	42, // 78: daemon.DaemonService.SetLogLevel:output_type -> daemon.SetLogLevelResponse
-	45, // 79: daemon.DaemonService.ListStates:output_type -> daemon.ListStatesResponse
-	47, // 80: daemon.DaemonService.CleanState:output_type -> daemon.CleanStateResponse
-	49, // 81: daemon.DaemonService.DeleteState:output_type -> daemon.DeleteStateResponse
-	51, // 82: daemon.DaemonService.SetSyncResponsePersistence:output_type -> daemon.SetSyncResponsePersistenceResponse
-	55, // 83: daemon.DaemonService.TracePacket:output_type -> daemon.TracePacketResponse
-	57, // 84: daemon.DaemonService.SubscribeEvents:output_type -> daemon.SystemEvent
-	59, // 85: daemon.DaemonService.GetEvents:output_type -> daemon.GetEventsResponse
-	61, // 86: daemon.DaemonService.SwitchProfile:output_type -> daemon.SwitchProfileResponse
-	63, // 87: daemon.DaemonService.SetConfig:output_type -> daemon.SetConfigResponse
-	65, // 88: daemon.DaemonService.AddProfile:output_type -> daemon.AddProfileResponse
-	67, // 89: daemon.DaemonService.RemoveProfile:output_type -> daemon.RemoveProfileResponse
-	69, // 90: daemon.DaemonService.ListProfiles:output_type -> daemon.ListProfilesResponse
-	72, // 91: daemon.DaemonService.GetActiveProfile:output_type -> daemon.GetActiveProfileResponse
-	74, // 92: daemon.DaemonService.Logout:output_type -> daemon.LogoutResponse
-	76, // 93: daemon.DaemonService.GetFeatures:output_type -> daemon.GetFeaturesResponse
-	78, // 94: daemon.DaemonService.GetPeerSSHHostKey:output_type -> daemon.GetPeerSSHHostKeyResponse
-	80, // 95: daemon.DaemonService.RequestJWTAuth:output_type -> daemon.RequestJWTAuthResponse
-	82, // 96: daemon.DaemonService.WaitJWTToken:output_type -> daemon.WaitJWTTokenResponse
-	6,  // 97: daemon.DaemonService.NotifyOSLifecycle:output_type -> daemon.OSLifecycleResponse
-	66, // [66:98] is the sub-list for method output_type
-	34, // [34:66] is the sub-list for method input_type
+	83, // 66: daemon.DaemonService.GetInstallerResult:input_type -> daemon.InstallerResultRequest
+	8,  // 67: daemon.DaemonService.Login:output_type -> daemon.LoginResponse
+	10, // 68: daemon.DaemonService.WaitSSOLogin:output_type -> daemon.WaitSSOLoginResponse
+	12, // 69: daemon.DaemonService.Up:output_type -> daemon.UpResponse
+	14, // 70: daemon.DaemonService.Status:output_type -> daemon.StatusResponse
+	16, // 71: daemon.DaemonService.Down:output_type -> daemon.DownResponse
+	18, // 72: daemon.DaemonService.GetConfig:output_type -> daemon.GetConfigResponse
+	29, // 73: daemon.DaemonService.ListNetworks:output_type -> daemon.ListNetworksResponse
+	31, // 74: daemon.DaemonService.SelectNetworks:output_type -> daemon.SelectNetworksResponse
+	31, // 75: daemon.DaemonService.DeselectNetworks:output_type -> daemon.SelectNetworksResponse
+	36, // 76: daemon.DaemonService.ForwardingRules:output_type -> daemon.ForwardingRulesResponse
+	38, // 77: daemon.DaemonService.DebugBundle:output_type -> daemon.DebugBundleResponse
+	40, // 78: daemon.DaemonService.GetLogLevel:output_type -> daemon.GetLogLevelResponse
+	42, // 79: daemon.DaemonService.SetLogLevel:output_type -> daemon.SetLogLevelResponse
+	45, // 80: daemon.DaemonService.ListStates:output_type -> daemon.ListStatesResponse
+	47, // 81: daemon.DaemonService.CleanState:output_type -> daemon.CleanStateResponse
+	49, // 82: daemon.DaemonService.DeleteState:output_type -> daemon.DeleteStateResponse
+	51, // 83: daemon.DaemonService.SetSyncResponsePersistence:output_type -> daemon.SetSyncResponsePersistenceResponse
+	55, // 84: daemon.DaemonService.TracePacket:output_type -> daemon.TracePacketResponse
+	57, // 85: daemon.DaemonService.SubscribeEvents:output_type -> daemon.SystemEvent
+	59, // 86: daemon.DaemonService.GetEvents:output_type -> daemon.GetEventsResponse
+	61, // 87: daemon.DaemonService.SwitchProfile:output_type -> daemon.SwitchProfileResponse
+	63, // 88: daemon.DaemonService.SetConfig:output_type -> daemon.SetConfigResponse
+	65, // 89: daemon.DaemonService.AddProfile:output_type -> daemon.AddProfileResponse
+	67, // 90: daemon.DaemonService.RemoveProfile:output_type -> daemon.RemoveProfileResponse
+	69, // 91: daemon.DaemonService.ListProfiles:output_type -> daemon.ListProfilesResponse
+	72, // 92: daemon.DaemonService.GetActiveProfile:output_type -> daemon.GetActiveProfileResponse
+	74, // 93: daemon.DaemonService.Logout:output_type -> daemon.LogoutResponse
+	76, // 94: daemon.DaemonService.GetFeatures:output_type -> daemon.GetFeaturesResponse
+	78, // 95: daemon.DaemonService.GetPeerSSHHostKey:output_type -> daemon.GetPeerSSHHostKeyResponse
+	80, // 96: daemon.DaemonService.RequestJWTAuth:output_type -> daemon.RequestJWTAuthResponse
+	82, // 97: daemon.DaemonService.WaitJWTToken:output_type -> daemon.WaitJWTTokenResponse
+	6,  // 98: daemon.DaemonService.NotifyOSLifecycle:output_type -> daemon.OSLifecycleResponse
+	84, // 99: daemon.DaemonService.GetInstallerResult:output_type -> daemon.InstallerResultResponse
+	67, // [67:100] is the sub-list for method output_type
+	34, // [34:67] is the sub-list for method input_type
 	34, // [34:34] is the sub-list for extension type_name
 	34, // [34:34] is the sub-list for extension extendee
 	0,  // [0:34] is the sub-list for field type_name
@@ -6174,7 +6283,7 @@ func file_daemon_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_daemon_proto_rawDesc), len(file_daemon_proto_rawDesc)),
 			NumEnums:      4,
-			NumMessages:   82,
+			NumMessages:   84,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

client/proto/daemon.proto

@@ -95,6 +95,8 @@ service DaemonService {
   rpc WaitJWTToken(WaitJWTTokenRequest) returns (WaitJWTTokenResponse) {}
 
   rpc NotifyOSLifecycle(OSLifecycleRequest) returns(OSLifecycleResponse) {}
+
+  rpc GetInstallerResult(InstallerResultRequest) returns (InstallerResultResponse) {}
 }
 
 
@@ -215,6 +217,7 @@ message WaitSSOLoginResponse {
 message UpRequest {
   optional string profileName = 1;
   optional string username = 2;
+  optional bool autoUpdate = 3;
 }
 
 message UpResponse {}
@@ -772,3 +775,11 @@ message WaitJWTTokenResponse {
   // expiration time in seconds
   int64 expiresIn = 3;
 }
+
+message InstallerResultRequest {
+}
+
+message InstallerResultResponse {
+  bool success = 1;
+  string errorMsg = 2;
+}

client/proto/daemon_grpc.pb.go

@@ -71,6 +71,7 @@ type DaemonServiceClient interface {
 	// WaitJWTToken waits for JWT authentication completion
 	WaitJWTToken(ctx context.Context, in *WaitJWTTokenRequest, opts ...grpc.CallOption) (*WaitJWTTokenResponse, error)
 	NotifyOSLifecycle(ctx context.Context, in *OSLifecycleRequest, opts ...grpc.CallOption) (*OSLifecycleResponse, error)
+	GetInstallerResult(ctx context.Context, in *InstallerResultRequest, opts ...grpc.CallOption) (*InstallerResultResponse, error)
 }
 
 type daemonServiceClient struct {
@@ -392,6 +393,15 @@ func (c *daemonServiceClient) NotifyOSLifecycle(ctx context.Context, in *OSLifec
 	return out, nil
 }
 
+func (c *daemonServiceClient) GetInstallerResult(ctx context.Context, in *InstallerResultRequest, opts ...grpc.CallOption) (*InstallerResultResponse, error) {
+	out := new(InstallerResultResponse)
+	err := c.cc.Invoke(ctx, "/daemon.DaemonService/GetInstallerResult", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // DaemonServiceServer is the server API for DaemonService service.
 // All implementations must embed UnimplementedDaemonServiceServer
 // for forward compatibility
@@ -449,6 +459,7 @@ type DaemonServiceServer interface {
 	// WaitJWTToken waits for JWT authentication completion
 	WaitJWTToken(context.Context, *WaitJWTTokenRequest) (*WaitJWTTokenResponse, error)
 	NotifyOSLifecycle(context.Context, *OSLifecycleRequest) (*OSLifecycleResponse, error)
+	GetInstallerResult(context.Context, *InstallerResultRequest) (*InstallerResultResponse, error)
 	mustEmbedUnimplementedDaemonServiceServer()
 }
 
@@ -552,6 +563,9 @@ func (UnimplementedDaemonServiceServer) WaitJWTToken(context.Context, *WaitJWTTo
 func (UnimplementedDaemonServiceServer) NotifyOSLifecycle(context.Context, *OSLifecycleRequest) (*OSLifecycleResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method NotifyOSLifecycle not implemented")
 }
+func (UnimplementedDaemonServiceServer) GetInstallerResult(context.Context, *InstallerResultRequest) (*InstallerResultResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetInstallerResult not implemented")
+}
 func (UnimplementedDaemonServiceServer) mustEmbedUnimplementedDaemonServiceServer() {}
 
 // UnsafeDaemonServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -1144,6 +1158,24 @@ func _DaemonService_NotifyOSLifecycle_Handler(srv interface{}, ctx context.Conte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _DaemonService_GetInstallerResult_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(InstallerResultRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(DaemonServiceServer).GetInstallerResult(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/daemon.DaemonService/GetInstallerResult",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(DaemonServiceServer).GetInstallerResult(ctx, req.(*InstallerResultRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // DaemonService_ServiceDesc is the grpc.ServiceDesc for DaemonService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -1275,6 +1307,10 @@ var DaemonService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "NotifyOSLifecycle",
 			Handler:    _DaemonService_NotifyOSLifecycle_Handler,
 		},
+		{
+			MethodName: "GetInstallerResult",
+			Handler:    _DaemonService_GetInstallerResult_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{

client/proto/generate.sh

@@ -14,4 +14,4 @@ cd "$script_path"
 go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.36.6
 go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1
 protoc -I ./ ./daemon.proto --go_out=../ --go-grpc_out=../ --experimental_allow_proto3_optional
-cd "$old_pwd"
+cd "$old_pwd"

client/server/server.go

@@ -192,7 +192,7 @@ func (s *Server) Start() error {
 	s.clientRunning = true
 	s.clientRunningChan = make(chan struct{})
 	s.clientGiveUpChan = make(chan struct{})
-	go s.connectWithRetryRuns(ctx, config, s.statusRecorder, s.clientRunningChan, s.clientGiveUpChan)
+	go s.connectWithRetryRuns(ctx, config, s.statusRecorder, false, s.clientRunningChan, s.clientGiveUpChan)
 	return nil
 }
 
@@ -223,7 +223,7 @@ func (s *Server) setDefaultConfigIfNotExists(ctx context.Context) error {
 // connectWithRetryRuns runs the client connection with a backoff strategy where we retry the operation as additional
 // mechanism to keep the client connected even when the connection is lost.
 // we cancel retry if the client receive a stop or down command, or if disable auto connect is configured.
-func (s *Server) connectWithRetryRuns(ctx context.Context, profileConfig *profilemanager.Config, statusRecorder *peer.Status, runningChan chan struct{}, giveUpChan chan struct{}) {
+func (s *Server) connectWithRetryRuns(ctx context.Context, profileConfig *profilemanager.Config, statusRecorder *peer.Status, doInitialAutoUpdate bool, runningChan chan struct{}, giveUpChan chan struct{}) {
 	defer func() {
 		s.mutex.Lock()
 		s.clientRunning = false
@@ -231,7 +231,7 @@ func (s *Server) connectWithRetryRuns(ctx context.Context, profileConfig *profil
 	}()
 
 	if s.config.DisableAutoConnect {
-		if err := s.connect(ctx, s.config, s.statusRecorder, runningChan); err != nil {
+		if err := s.connect(ctx, s.config, s.statusRecorder, doInitialAutoUpdate, runningChan); err != nil {
 			log.Debugf("run client connection exited with error: %v", err)
 		}
 		log.Tracef("client connection exited")
@@ -260,7 +260,8 @@ func (s *Server) connectWithRetryRuns(ctx context.Context, profileConfig *profil
 	}()
 
 	runOperation := func() error {
-		err := s.connect(ctx, profileConfig, statusRecorder, runningChan)
+		err := s.connect(ctx, profileConfig, statusRecorder, doInitialAutoUpdate, runningChan)
+		doInitialAutoUpdate = false
 		if err != nil {
 			log.Debugf("run client connection exited with error: %v. Will retry in the background", err)
 			return err
@@ -728,7 +729,12 @@ func (s *Server) Up(callerCtx context.Context, msg *proto.UpRequest) (*proto.UpR
 	s.clientRunning = true
 	s.clientRunningChan = make(chan struct{})
 	s.clientGiveUpChan = make(chan struct{})
-	go s.connectWithRetryRuns(ctx, s.config, s.statusRecorder, s.clientRunningChan, s.clientGiveUpChan)
+
+	var doAutoUpdate bool
+	if msg != nil && msg.AutoUpdate != nil && *msg.AutoUpdate {
+		doAutoUpdate = true
+	}
+	go s.connectWithRetryRuns(ctx, s.config, s.statusRecorder, doAutoUpdate, s.clientRunningChan, s.clientGiveUpChan)
 
 	return s.waitForUp(callerCtx)
 }
@@ -1539,9 +1545,9 @@ func (s *Server) GetFeatures(ctx context.Context, msg *proto.GetFeaturesRequest)
 	return features, nil
 }
 
-func (s *Server) connect(ctx context.Context, config *profilemanager.Config, statusRecorder *peer.Status, runningChan chan struct{}) error {
+func (s *Server) connect(ctx context.Context, config *profilemanager.Config, statusRecorder *peer.Status, doInitialAutoUpdate bool, runningChan chan struct{}) error {
 	log.Tracef("running client connection")
-	s.connectClient = internal.NewConnectClient(ctx, config, statusRecorder)
+	s.connectClient = internal.NewConnectClient(ctx, config, statusRecorder, doInitialAutoUpdate)
 	s.connectClient.SetSyncResponsePersistence(s.persistSyncResponse)
 	if err := s.connectClient.Run(runningChan); err != nil {
 		return err

client/server/server_test.go

@@ -112,7 +112,7 @@ func TestConnectWithRetryRuns(t *testing.T) {
 	t.Setenv(maxRetryTimeVar, "5s")
 	t.Setenv(retryMultiplierVar, "1")
 
-	s.connectWithRetryRuns(ctx, config, s.statusRecorder, nil, nil)
+	s.connectWithRetryRuns(ctx, config, s.statusRecorder, false, nil, nil)
 	if counter < 3 {
 		t.Fatalf("expected counter > 2, got %d", counter)
 	}

client/server/updateresult.go

@@ -0,0 +1,30 @@
+package server
+
+import (
+	"context"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal/updatemanager/installer"
+	"github.com/netbirdio/netbird/client/proto"
+)
+
+func (s *Server) GetInstallerResult(ctx context.Context, _ *proto.InstallerResultRequest) (*proto.InstallerResultResponse, error) {
+	inst := installer.New()
+	dir := inst.TempDir()
+
+	rh := installer.NewResultHandler(dir)
+	result, err := rh.Watch(ctx)
+	if err != nil {
+		log.Errorf("failed to watch update result: %v", err)
+		return &proto.InstallerResultResponse{
+			Success:  false,
+			ErrorMsg: err.Error(),
+		}, nil
+	}
+
+	return &proto.InstallerResultResponse{
+		Success:  result.Success,
+		ErrorMsg: result.Error,
+	}, nil
+}

client/ui/client_ui.go

@@ -34,6 +34,7 @@ import (
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
+	protobuf "google.golang.org/protobuf/proto"
 
 	"github.com/netbirdio/netbird/client/iface"
 	"github.com/netbirdio/netbird/client/internal"
@@ -43,7 +44,6 @@ import (
 	"github.com/netbirdio/netbird/client/ui/desktop"
 	"github.com/netbirdio/netbird/client/ui/event"
 	"github.com/netbirdio/netbird/client/ui/process"
-
 	"github.com/netbirdio/netbird/util"
 
 	"github.com/netbirdio/netbird/version"
@@ -87,22 +87,24 @@ func main() {
 
 	// Create the service client (this also builds the settings or networks UI if requested).
 	client := newServiceClient(&newServiceClientArgs{
-		addr:             flags.daemonAddr,
-		logFile:          logFile,
-		app:              a,
-		showSettings:     flags.showSettings,
-		showNetworks:     flags.showNetworks,
-		showLoginURL:     flags.showLoginURL,
-		showDebug:        flags.showDebug,
-		showProfiles:     flags.showProfiles,
-		showQuickActions: flags.showQuickActions,
+		addr:              flags.daemonAddr,
+		logFile:           logFile,
+		app:               a,
+		showSettings:      flags.showSettings,
+		showNetworks:      flags.showNetworks,
+		showLoginURL:      flags.showLoginURL,
+		showDebug:         flags.showDebug,
+		showProfiles:      flags.showProfiles,
+		showQuickActions:  flags.showQuickActions,
+		showUpdate:        flags.showUpdate,
+		showUpdateVersion: flags.showUpdateVersion,
 	})
 
 	// Watch for theme/settings changes to update the icon.
 	go watchSettingsChanges(a, client)
 
 	// Run in window mode if any UI flag was set.
-	if flags.showSettings || flags.showNetworks || flags.showDebug || flags.showLoginURL || flags.showProfiles || flags.showQuickActions {
+	if flags.showSettings || flags.showNetworks || flags.showDebug || flags.showLoginURL || flags.showProfiles || flags.showQuickActions || flags.showUpdate {
 		a.Run()
 		return
 	}
@@ -128,15 +130,17 @@ func main() {
 }
 
 type cliFlags struct {
-	daemonAddr       string
-	showSettings     bool
-	showNetworks     bool
-	showProfiles     bool
-	showDebug        bool
-	showLoginURL     bool
-	showQuickActions bool
-	errorMsg         string
-	saveLogsInFile   bool
+	daemonAddr        string
+	showSettings      bool
+	showNetworks      bool
+	showProfiles      bool
+	showDebug         bool
+	showLoginURL      bool
+	showQuickActions  bool
+	errorMsg          string
+	saveLogsInFile    bool
+	showUpdate        bool
+	showUpdateVersion string
 }
 
 // parseFlags reads and returns all needed command-line flags.
@@ -156,6 +160,8 @@ func parseFlags() *cliFlags {
 	flag.StringVar(&flags.errorMsg, "error-msg", "", "displays an error message window")
 	flag.BoolVar(&flags.saveLogsInFile, "use-log-file", false, fmt.Sprintf("save logs in a file: %s/netbird-ui-PID.log", os.TempDir()))
 	flag.BoolVar(&flags.showLoginURL, "login-url", false, "show login URL in a popup window")
+	flag.BoolVar(&flags.showUpdate, "update", false, "show update progress window")
+	flag.StringVar(&flags.showUpdateVersion, "update-version", "", "version to update to")
 	flag.Parse()
 	return &flags
 }
@@ -319,6 +325,8 @@ type serviceClient struct {
 	mExitNodeDeselectAll *systray.MenuItem
 	logFile              string
 	wLoginURL            fyne.Window
+	wUpdateProgress      fyne.Window
+	updateContextCancel  context.CancelFunc
 
 	connectCancel context.CancelFunc
 }
@@ -329,15 +337,17 @@ type menuHandler struct {
 }
 
 type newServiceClientArgs struct {
-	addr             string
-	logFile          string
-	app              fyne.App
-	showSettings     bool
-	showNetworks     bool
-	showDebug        bool
-	showLoginURL     bool
-	showProfiles     bool
-	showQuickActions bool
+	addr              string
+	logFile           string
+	app               fyne.App
+	showSettings      bool
+	showNetworks      bool
+	showDebug         bool
+	showLoginURL      bool
+	showProfiles      bool
+	showQuickActions  bool
+	showUpdate        bool
+	showUpdateVersion string
 }
 
 // newServiceClient instance constructor
@@ -355,7 +365,7 @@ func newServiceClient(args *newServiceClientArgs) *serviceClient {
 
 		showAdvancedSettings: args.showSettings,
 		showNetworks:         args.showNetworks,
-		update:               version.NewUpdate("nb/client-ui"),
+		update:               version.NewUpdateAndStart("nb/client-ui"),
 	}
 
 	s.eventHandler = newEventHandler(s)
@@ -375,6 +385,8 @@ func newServiceClient(args *newServiceClientArgs) *serviceClient {
 		s.showProfilesUI()
 	case args.showQuickActions:
 		s.showQuickActionsUI()
+	case args.showUpdate:
+		s.showUpdateProgress(ctx, args.showUpdateVersion)
 	}
 
 	return s
@@ -814,7 +826,7 @@ func (s *serviceClient) handleSSOLogin(ctx context.Context, loginResp *proto.Log
 	return nil
 }
 
-func (s *serviceClient) menuUpClick(ctx context.Context) error {
+func (s *serviceClient) menuUpClick(ctx context.Context, wannaAutoUpdate bool) error {
 	systray.SetTemplateIcon(iconConnectingMacOS, s.icConnecting)
 	conn, err := s.getSrvClient(defaultFailTimeout)
 	if err != nil {
@@ -836,7 +848,9 @@ func (s *serviceClient) menuUpClick(ctx context.Context) error {
 		return nil
 	}
 
-	if _, err := conn.Up(ctx, &proto.UpRequest{}); err != nil {
+	if _, err := s.conn.Up(s.ctx, &proto.UpRequest{
+		AutoUpdate: protobuf.Bool(wannaAutoUpdate),
+	}); err != nil {
 		return fmt.Errorf("start connection: %w", err)
 	}
 
@@ -1097,6 +1111,26 @@ func (s *serviceClient) onTrayReady() {
 			s.updateExitNodes()
 		}
 	})
+	s.eventManager.AddHandler(func(event *proto.SystemEvent) {
+		// todo use new Category
+		if windowAction, ok := event.Metadata["progress_window"]; ok {
+			targetVersion, ok := event.Metadata["version"]
+			if !ok {
+				targetVersion = "unknown"
+			}
+			log.Debugf("window action: %v", windowAction)
+			if windowAction == "show" {
+				if s.updateContextCancel != nil {
+					s.updateContextCancel()
+					s.updateContextCancel = nil
+				}
+
+				subCtx, cancel := context.WithCancel(s.ctx)
+				go s.eventHandler.runSelfCommand(subCtx, "update", "--update-version", targetVersion)
+				s.updateContextCancel = cancel
+			}
+		}
+	})
 
 	go s.eventManager.Start(s.ctx)
 	go s.eventHandler.listen(s.ctx)

client/ui/event_handler.go

@@ -80,7 +80,7 @@ func (h *eventHandler) handleConnectClick() {
 	go func() {
 		defer connectCancel()
 
-		if err := h.client.menuUpClick(connectCtx); err != nil {
+		if err := h.client.menuUpClick(connectCtx, true); err != nil {
 			st, ok := status.FromError(err)
 			if errors.Is(err, context.Canceled) || (ok && st.Code() == codes.Canceled) {
 				log.Debugf("connect operation cancelled by user")
@@ -185,7 +185,7 @@ func (h *eventHandler) handleAdvancedSettingsClick() {
 	go func() {
 		defer h.client.mAdvancedSettings.Enable()
 		defer h.client.getSrvConfig()
-		h.runSelfCommand(h.client.ctx, "settings", "true")
+		h.runSelfCommand(h.client.ctx, "settings")
 	}()
 }
 
@@ -193,7 +193,7 @@ func (h *eventHandler) handleCreateDebugBundleClick() {
 	h.client.mCreateDebugBundle.Disable()
 	go func() {
 		defer h.client.mCreateDebugBundle.Enable()
-		h.runSelfCommand(h.client.ctx, "debug", "true")
+		h.runSelfCommand(h.client.ctx, "debug")
 	}()
 }
 
@@ -217,7 +217,7 @@ func (h *eventHandler) handleNetworksClick() {
 	h.client.mNetworks.Disable()
 	go func() {
 		defer h.client.mNetworks.Enable()
-		h.runSelfCommand(h.client.ctx, "networks", "true")
+		h.runSelfCommand(h.client.ctx, "networks")
 	}()
 }
 
@@ -237,17 +237,21 @@ func (h *eventHandler) updateConfigWithErr() error {
 	return nil
 }
 
-func (h *eventHandler) runSelfCommand(ctx context.Context, command, arg string) {
+func (h *eventHandler) runSelfCommand(ctx context.Context, command string, args ...string) {
 	proc, err := os.Executable()
 	if err != nil {
 		log.Errorf("error getting executable path: %v", err)
 		return
 	}
 
-	cmd := exec.CommandContext(ctx, proc,
-		fmt.Sprintf("--%s=%s", command, arg),
+	// Build the full command arguments
+	cmdArgs := []string{
+		fmt.Sprintf("--%s=true", command),
 		fmt.Sprintf("--daemon-addr=%s", h.client.addr),
-	)
+	}
+	cmdArgs = append(cmdArgs, args...)
+
+	cmd := exec.CommandContext(ctx, proc, cmdArgs...)
 
 	if out := h.client.attachOutput(cmd); out != nil {
 		defer func() {
@@ -257,17 +261,17 @@ func (h *eventHandler) runSelfCommand(ctx context.Context, command, arg string)
 		}()
 	}
 
-	log.Printf("running command: %s --%s=%s --daemon-addr=%s", proc, command, arg, h.client.addr)
+	log.Printf("running command: %s", cmd.String())
 
 	if err := cmd.Run(); err != nil {
 		var exitErr *exec.ExitError
 		if errors.As(err, &exitErr) {
-			log.Printf("command '%s %s' failed with exit code %d", command, arg, exitErr.ExitCode())
+			log.Printf("command '%s' failed with exit code %d", cmd.String(), exitErr.ExitCode())
 		}
 		return
 	}
 
-	log.Printf("command '%s %s' completed successfully", command, arg)
+	log.Printf("command '%s' completed successfully", cmd.String())
 }
 
 func (h *eventHandler) logout(ctx context.Context) error {

client/ui/profile.go

@@ -397,7 +397,7 @@ type profileMenu struct {
 	logoutSubItem         *subItem
 	profilesState         []Profile
 	downClickCallback     func() error
-	upClickCallback       func(context.Context) error
+	upClickCallback       func(context.Context, bool) error
 	getSrvClientCallback  func(timeout time.Duration) (proto.DaemonServiceClient, error)
 	loadSettingsCallback  func()
 	app                   fyne.App
@@ -411,7 +411,7 @@ type newProfileMenuArgs struct {
 	profileMenuItem      *systray.MenuItem
 	emailMenuItem        *systray.MenuItem
 	downClickCallback    func() error
-	upClickCallback      func(context.Context) error
+	upClickCallback      func(context.Context, bool) error
 	getSrvClientCallback func(timeout time.Duration) (proto.DaemonServiceClient, error)
 	loadSettingsCallback func()
 	app                  fyne.App
@@ -579,7 +579,7 @@ func (p *profileMenu) refresh() {
 					connectCtx, connectCancel := context.WithCancel(p.ctx)
 					p.serviceClient.connectCancel = connectCancel
 
-					if err := p.upClickCallback(connectCtx); err != nil {
+					if err := p.upClickCallback(connectCtx, false); err != nil {
 						log.Errorf("failed to handle up click after switching profile: %v", err)
 					}
 

client/ui/quickactions.go

@@ -267,7 +267,7 @@ func (s *serviceClient) showQuickActionsUI() {
 
 	connCmd := connectCommand{
 		connectClient: func() error {
-			return s.menuUpClick(s.ctx)
+			return s.menuUpClick(s.ctx, false)
 		},
 	}
 

client/ui/update.go

@@ -0,0 +1,140 @@
+//go:build !(linux && 386)
+
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/widget"
+	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/proto"
+)
+
+func (s *serviceClient) showUpdateProgress(ctx context.Context, version string) {
+	log.Infof("show installer progress window: %s", version)
+	s.wUpdateProgress = s.app.NewWindow("Automatically updating client")
+
+	statusLabel := widget.NewLabel("Updating...")
+	infoLabel := widget.NewLabel(fmt.Sprintf("Your client version is older than the auto-update version set in Management.\nUpdating client to: %s.", version))
+	content := container.NewVBox(infoLabel, statusLabel)
+	s.wUpdateProgress.SetContent(content)
+	s.wUpdateProgress.CenterOnScreen()
+	s.wUpdateProgress.SetFixedSize(true)
+	s.wUpdateProgress.SetCloseIntercept(func() {
+		// this is empty to lock window until result known
+	})
+	s.wUpdateProgress.RequestFocus()
+	s.wUpdateProgress.Show()
+
+	updateWindowCtx, cancel := context.WithTimeout(ctx, 15*time.Minute)
+
+	// Initialize dot updater
+	updateText := dotUpdater()
+
+	// Channel to receive the result from RPC call
+	resultErrCh := make(chan error, 1)
+	resultOkCh := make(chan struct{}, 1)
+
+	// Start RPC call in background
+	go func() {
+		conn, err := s.getSrvClient(defaultFailTimeout)
+		if err != nil {
+			log.Infof("backend not reachable, upgrade in progress: %v", err)
+			close(resultOkCh)
+			return
+		}
+
+		resp, err := conn.GetInstallerResult(updateWindowCtx, &proto.InstallerResultRequest{})
+		if err != nil {
+			log.Infof("backend stopped responding, upgrade in progress: %v", err)
+			close(resultOkCh)
+			return
+		}
+
+		if !resp.Success {
+			resultErrCh <- mapInstallError(resp.ErrorMsg)
+			return
+		}
+
+		// Success
+		close(resultOkCh)
+	}()
+
+	// Update UI with dots and wait for result
+	go func() {
+		ticker := time.NewTicker(time.Second)
+		defer ticker.Stop()
+		defer cancel()
+
+		// allow closing update window after 10 sec
+		timerResetCloseInterceptor := time.NewTimer(10 * time.Second)
+		defer timerResetCloseInterceptor.Stop()
+
+		for {
+			select {
+			case <-updateWindowCtx.Done():
+				s.showInstallerResult(statusLabel, updateWindowCtx.Err())
+				return
+			case err := <-resultErrCh:
+				s.showInstallerResult(statusLabel, err)
+				return
+			case <-resultOkCh:
+				log.Info("backend exited, upgrade in progress, closing all UI")
+				killParentUIProcess()
+				s.app.Quit()
+				return
+			case <-ticker.C:
+				statusLabel.SetText(updateText())
+			case <-timerResetCloseInterceptor.C:
+				s.wUpdateProgress.SetCloseIntercept(nil)
+			}
+		}
+	}()
+}
+
+func (s *serviceClient) showInstallerResult(statusLabel *widget.Label, err error) {
+	s.wUpdateProgress.SetCloseIntercept(nil)
+	switch {
+	case errors.Is(err, context.DeadlineExceeded):
+		log.Warn("update watcher timed out")
+		statusLabel.SetText("Update timed out. Please try again.")
+	case errors.Is(err, context.Canceled):
+		log.Info("update watcher canceled")
+		statusLabel.SetText("Update canceled.")
+	case err != nil:
+		log.Errorf("update failed: %v", err)
+		statusLabel.SetText("Update failed: " + err.Error())
+	default:
+		s.wUpdateProgress.Close()
+	}
+}
+
+// dotUpdater returns a closure that cycles through dots for a loading animation.
+func dotUpdater() func() string {
+	dotCount := 0
+	return func() string {
+		dotCount = (dotCount + 1) % 4
+		return fmt.Sprintf("%s%s", "Updating", strings.Repeat(".", dotCount))
+	}
+}
+
+func mapInstallError(msg string) error {
+	msg = strings.ToLower(strings.TrimSpace(msg))
+
+	switch {
+	case strings.Contains(msg, "deadline exceeded"), strings.Contains(msg, "timeout"):
+		return context.DeadlineExceeded
+	case strings.Contains(msg, "canceled"), strings.Contains(msg, "cancelled"):
+		return context.Canceled
+	case msg == "":
+		return errors.New("unknown update error")
+	default:
+		return errors.New(msg)
+	}
+}

client/ui/update_notwindows.go

@@ -0,0 +1,7 @@
+//go:build !windows && !(linux && 386)
+
+package main
+
+func killParentUIProcess() {
+	// No-op on non-Windows platforms
+}

client/ui/update_windows.go

@@ -0,0 +1,44 @@
+//go:build windows
+
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/sys/windows"
+
+	nbprocess "github.com/netbirdio/netbird/client/ui/process"
+)
+
+// killParentUIProcess finds and kills the parent systray UI process on Windows.
+// This is a workaround in case the MSI installer fails to properly terminate the UI process.
+// The installer should handle this via util:CloseApplication with TerminateProcess, but this
+// provides an additional safety mechanism to ensure the UI is closed before the upgrade proceeds.
+func killParentUIProcess() {
+	pid, running, err := nbprocess.IsAnotherProcessRunning()
+	if err != nil {
+		log.Warnf("failed to check for parent UI process: %v", err)
+		return
+	}
+
+	if !running {
+		log.Debug("no parent UI process found to kill")
+		return
+	}
+
+	log.Infof("killing parent UI process (PID: %d)", pid)
+
+	// Open the process with terminate rights
+	handle, err := windows.OpenProcess(windows.PROCESS_TERMINATE, false, uint32(pid))
+	if err != nil {
+		log.Warnf("failed to open parent process %d: %v", pid, err)
+		return
+	}
+	defer func() {
+		_ = windows.CloseHandle(handle)
+	}()
+
+	// Terminate the process with exit code 0
+	if err := windows.TerminateProcess(handle, 0); err != nil {
+		log.Warnf("failed to terminate parent process %d: %v", pid, err)
+	}
+}

management/internals/server/server.go

@@ -183,7 +183,7 @@ func (s *BaseServer) Start(ctx context.Context) error {
 	log.WithContext(ctx).Infof("running HTTP server and gRPC server on the same port: %s", s.listener.Addr().String())
 	s.serveGRPCWithHTTP(ctx, s.listener, rootHandler, tlsEnabled)
 
-	s.update = version.NewUpdate("nb/management")
+	s.update = version.NewUpdateAndStart("nb/management")
 	s.update.SetDaemonVersion(version.NetbirdVersion())
 	s.update.SetOnUpdateListener(func() {
 		log.WithContext(ctx).Infof("your management version, \"%s\", is outdated, a new management version is available. Learn more here: https://github.com/netbirdio/netbird/releases", version.NetbirdVersion())

management/internals/shared/grpc/conversion.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	integrationsConfig "github.com/netbirdio/management-integrations/integrations/config"
+
 	nbdns "github.com/netbirdio/netbird/dns"
 	"github.com/netbirdio/netbird/management/internals/controllers/network_map/controller/cache"
 	nbconfig "github.com/netbirdio/netbird/management/internals/server/config"
@@ -101,6 +102,9 @@ func toPeerConfig(peer *nbpeer.Peer, network *types.Network, dnsName string, set
 		Fqdn:                            fqdn,
 		RoutingPeerDnsResolutionEnabled: settings.RoutingPeerDNSResolutionEnabled,
 		LazyConnectionEnabled:           settings.LazyConnectionEnabled,
+		AutoUpdate: &proto.AutoUpdateSettings{
+			Version: settings.AutoUpdateVersion,
+		},
 	}
 }
 
@@ -108,9 +112,10 @@ func ToSyncResponse(ctx context.Context, config *nbconfig.Config, httpConfig *nb
 	response := &proto.SyncResponse{
 		PeerConfig: toPeerConfig(peer, networkMap.Network, dnsName, settings, httpConfig, deviceFlowConfig),
 		NetworkMap: &proto.NetworkMap{
-			Serial:    networkMap.Network.CurrentSerial(),
-			Routes:    toProtocolRoutes(networkMap.Routes),
-			DNSConfig: toProtocolDNSConfig(networkMap.DNSConfig, dnsCache, dnsFwdPort),
+			Serial:     networkMap.Network.CurrentSerial(),
+			Routes:     toProtocolRoutes(networkMap.Routes),
+			DNSConfig:  toProtocolDNSConfig(networkMap.DNSConfig, dnsCache, dnsFwdPort),
+			PeerConfig: toPeerConfig(peer, networkMap.Network, dnsName, settings, httpConfig, deviceFlowConfig),
 		},
 		Checks: toProtocolChecks(ctx, checks),
 	}

management/server/account.go

@@ -321,7 +321,8 @@ func (am *DefaultAccountManager) UpdateAccountSettings(ctx context.Context, acco
 
 		if oldSettings.RoutingPeerDNSResolutionEnabled != newSettings.RoutingPeerDNSResolutionEnabled ||
 			oldSettings.LazyConnectionEnabled != newSettings.LazyConnectionEnabled ||
-			oldSettings.DNSDomain != newSettings.DNSDomain {
+			oldSettings.DNSDomain != newSettings.DNSDomain ||
+			oldSettings.AutoUpdateVersion != newSettings.AutoUpdateVersion {
 			updateAccountPeers = true
 		}
 
@@ -360,6 +361,7 @@ func (am *DefaultAccountManager) UpdateAccountSettings(ctx context.Context, acco
 	am.handleLazyConnectionSettings(ctx, oldSettings, newSettings, userID, accountID)
 	am.handlePeerLoginExpirationSettings(ctx, oldSettings, newSettings, userID, accountID)
 	am.handleGroupsPropagationSettings(ctx, oldSettings, newSettings, userID, accountID)
+	am.handleAutoUpdateVersionSettings(ctx, oldSettings, newSettings, userID, accountID)
 	if err = am.handleInactivityExpirationSettings(ctx, oldSettings, newSettings, userID, accountID); err != nil {
 		return nil, err
 	}
@@ -451,6 +453,14 @@ func (am *DefaultAccountManager) handleGroupsPropagationSettings(ctx context.Con
 	}
 }
 
+func (am *DefaultAccountManager) handleAutoUpdateVersionSettings(ctx context.Context, oldSettings, newSettings *types.Settings, userID, accountID string) {
+	if oldSettings.AutoUpdateVersion != newSettings.AutoUpdateVersion {
+		am.StoreEvent(ctx, userID, accountID, accountID, activity.AccountAutoUpdateVersionUpdated, map[string]any{
+			"version": newSettings.AutoUpdateVersion,
+		})
+	}
+}
+
 func (am *DefaultAccountManager) handleInactivityExpirationSettings(ctx context.Context, oldSettings, newSettings *types.Settings, userID, accountID string) error {
 	if newSettings.PeerInactivityExpirationEnabled {
 		if oldSettings.PeerInactivityExpiration != newSettings.PeerInactivityExpiration {

management/server/activity/codes.go

@@ -181,6 +181,8 @@ const (
 	UserRejected               Activity = 90
 	UserCreated                Activity = 91
 
+	AccountAutoUpdateVersionUpdated Activity = 92
+
 	AccountDeleted Activity = 99999
 )
 
@@ -287,9 +289,12 @@ var activityMap = map[Activity]Code{
 	AccountNetworkRangeUpdated: {"Account network range updated", "account.network.range.update"},
 
 	PeerIPUpdated: {"Peer IP updated", "peer.ip.update"},
-	UserApproved:  {"User approved", "user.approve"},
-	UserRejected:  {"User rejected", "user.reject"},
-	UserCreated:   {"User created", "user.create"},
+
+	UserApproved: {"User approved", "user.approve"},
+	UserRejected: {"User rejected", "user.reject"},
+	UserCreated:  {"User created", "user.create"},
+
+	AccountAutoUpdateVersionUpdated: {"Account AutoUpdate Version updated", "account.settings.auto.version.update"},
 }
 
 // StringCode returns a string code of the activity

management/server/http/handlers/accounts/accounts_handler.go

@@ -3,12 +3,15 @@ package accounts
 import (
 	"context"
 	"encoding/json"
+	"fmt"
 	"net/http"
 	"net/netip"
 	"time"
 
 	"github.com/gorilla/mux"
 
+	goversion "github.com/hashicorp/go-version"
+
 	"github.com/netbirdio/netbird/management/server/account"
 	nbcontext "github.com/netbirdio/netbird/management/server/context"
 	"github.com/netbirdio/netbird/management/server/settings"
@@ -26,7 +29,9 @@ const (
 	// MinNetworkBits is the minimum prefix length for IPv4 network ranges (e.g., /29 gives 8 addresses, /28 gives 16)
 	MinNetworkBitsIPv4 = 28
 	// MinNetworkBitsIPv6 is the minimum prefix length for IPv6 network ranges
-	MinNetworkBitsIPv6 = 120
+	MinNetworkBitsIPv6      = 120
+	disableAutoUpdate       = "disabled"
+	autoUpdateLatestVersion = "latest"
 )
 
 // handler is a handler that handles the server.Account HTTP endpoints
@@ -162,6 +167,61 @@ func (h *handler) getAllAccounts(w http.ResponseWriter, r *http.Request) {
 	util.WriteJSONObject(r.Context(), w, []*api.Account{resp})
 }
 
+func (h *handler) updateAccountRequestSettings(req api.PutApiAccountsAccountIdJSONRequestBody) (*types.Settings, error) {
+	returnSettings := &types.Settings{
+		PeerLoginExpirationEnabled: req.Settings.PeerLoginExpirationEnabled,
+		PeerLoginExpiration:        time.Duration(float64(time.Second.Nanoseconds()) * float64(req.Settings.PeerLoginExpiration)),
+		RegularUsersViewBlocked:    req.Settings.RegularUsersViewBlocked,
+
+		PeerInactivityExpirationEnabled: req.Settings.PeerInactivityExpirationEnabled,
+		PeerInactivityExpiration:        time.Duration(float64(time.Second.Nanoseconds()) * float64(req.Settings.PeerInactivityExpiration)),
+	}
+
+	if req.Settings.Extra != nil {
+		returnSettings.Extra = &types.ExtraSettings{
+			PeerApprovalEnabled:      req.Settings.Extra.PeerApprovalEnabled,
+			UserApprovalRequired:     req.Settings.Extra.UserApprovalRequired,
+			FlowEnabled:              req.Settings.Extra.NetworkTrafficLogsEnabled,
+			FlowGroups:               req.Settings.Extra.NetworkTrafficLogsGroups,
+			FlowPacketCounterEnabled: req.Settings.Extra.NetworkTrafficPacketCounterEnabled,
+		}
+	}
+
+	if req.Settings.JwtGroupsEnabled != nil {
+		returnSettings.JWTGroupsEnabled = *req.Settings.JwtGroupsEnabled
+	}
+	if req.Settings.GroupsPropagationEnabled != nil {
+		returnSettings.GroupsPropagationEnabled = *req.Settings.GroupsPropagationEnabled
+	}
+	if req.Settings.JwtGroupsClaimName != nil {
+		returnSettings.JWTGroupsClaimName = *req.Settings.JwtGroupsClaimName
+	}
+	if req.Settings.JwtAllowGroups != nil {
+		returnSettings.JWTAllowGroups = *req.Settings.JwtAllowGroups
+	}
+	if req.Settings.RoutingPeerDnsResolutionEnabled != nil {
+		returnSettings.RoutingPeerDNSResolutionEnabled = *req.Settings.RoutingPeerDnsResolutionEnabled
+	}
+	if req.Settings.DnsDomain != nil {
+		returnSettings.DNSDomain = *req.Settings.DnsDomain
+	}
+	if req.Settings.LazyConnectionEnabled != nil {
+		returnSettings.LazyConnectionEnabled = *req.Settings.LazyConnectionEnabled
+	}
+	if req.Settings.AutoUpdateVersion != nil {
+		_, err := goversion.NewSemver(*req.Settings.AutoUpdateVersion)
+		if *req.Settings.AutoUpdateVersion == autoUpdateLatestVersion ||
+			*req.Settings.AutoUpdateVersion == disableAutoUpdate ||
+			err == nil {
+			returnSettings.AutoUpdateVersion = *req.Settings.AutoUpdateVersion
+		} else if *req.Settings.AutoUpdateVersion != "" {
+			return nil, fmt.Errorf("invalid AutoUpdateVersion")
+		}
+	}
+
+	return returnSettings, nil
+}
+
 // updateAccount is HTTP PUT handler that updates the provided account. Updates only account settings (server.Settings)
 func (h *handler) updateAccount(w http.ResponseWriter, r *http.Request) {
 	userAuth, err := nbcontext.GetUserAuthFromContext(r.Context())
@@ -186,45 +246,10 @@ func (h *handler) updateAccount(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	settings := &types.Settings{
-		PeerLoginExpirationEnabled: req.Settings.PeerLoginExpirationEnabled,
-		PeerLoginExpiration:        time.Duration(float64(time.Second.Nanoseconds()) * float64(req.Settings.PeerLoginExpiration)),
-		RegularUsersViewBlocked:    req.Settings.RegularUsersViewBlocked,
-
-		PeerInactivityExpirationEnabled: req.Settings.PeerInactivityExpirationEnabled,
-		PeerInactivityExpiration:        time.Duration(float64(time.Second.Nanoseconds()) * float64(req.Settings.PeerInactivityExpiration)),
-	}
-
-	if req.Settings.Extra != nil {
-		settings.Extra = &types.ExtraSettings{
-			PeerApprovalEnabled:      req.Settings.Extra.PeerApprovalEnabled,
-			UserApprovalRequired:     req.Settings.Extra.UserApprovalRequired,
-			FlowEnabled:              req.Settings.Extra.NetworkTrafficLogsEnabled,
-			FlowGroups:               req.Settings.Extra.NetworkTrafficLogsGroups,
-			FlowPacketCounterEnabled: req.Settings.Extra.NetworkTrafficPacketCounterEnabled,
-		}
-	}
-
-	if req.Settings.JwtGroupsEnabled != nil {
-		settings.JWTGroupsEnabled = *req.Settings.JwtGroupsEnabled
-	}
-	if req.Settings.GroupsPropagationEnabled != nil {
-		settings.GroupsPropagationEnabled = *req.Settings.GroupsPropagationEnabled
-	}
-	if req.Settings.JwtGroupsClaimName != nil {
-		settings.JWTGroupsClaimName = *req.Settings.JwtGroupsClaimName
-	}
-	if req.Settings.JwtAllowGroups != nil {
-		settings.JWTAllowGroups = *req.Settings.JwtAllowGroups
-	}
-	if req.Settings.RoutingPeerDnsResolutionEnabled != nil {
-		settings.RoutingPeerDNSResolutionEnabled = *req.Settings.RoutingPeerDnsResolutionEnabled
-	}
-	if req.Settings.DnsDomain != nil {
-		settings.DNSDomain = *req.Settings.DnsDomain
-	}
-	if req.Settings.LazyConnectionEnabled != nil {
-		settings.LazyConnectionEnabled = *req.Settings.LazyConnectionEnabled
+	settings, err := h.updateAccountRequestSettings(req)
+	if err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
 	}
 	if req.Settings.NetworkRange != nil && *req.Settings.NetworkRange != "" {
 		prefix, err := netip.ParsePrefix(*req.Settings.NetworkRange)
@@ -313,6 +338,7 @@ func toAccountResponse(accountID string, settings *types.Settings, meta *types.A
 		RoutingPeerDnsResolutionEnabled: &settings.RoutingPeerDNSResolutionEnabled,
 		LazyConnectionEnabled:           &settings.LazyConnectionEnabled,
 		DnsDomain:                       &settings.DNSDomain,
+		AutoUpdateVersion:               &settings.AutoUpdateVersion,
 	}
 
 	if settings.NetworkRange.IsValid() {

management/server/http/handlers/accounts/accounts_handler_test.go

@@ -121,6 +121,7 @@ func TestAccounts_AccountsHandler(t *testing.T) {
 				RoutingPeerDnsResolutionEnabled: br(false),
 				LazyConnectionEnabled:           br(false),
 				DnsDomain:                       sr(""),
+				AutoUpdateVersion:               sr(""),
 			},
 			expectedArray: true,
 			expectedID:    accountID,
@@ -143,6 +144,30 @@ func TestAccounts_AccountsHandler(t *testing.T) {
 				RoutingPeerDnsResolutionEnabled: br(false),
 				LazyConnectionEnabled:           br(false),
 				DnsDomain:                       sr(""),
+				AutoUpdateVersion:               sr(""),
+			},
+			expectedArray: false,
+			expectedID:    accountID,
+		},
+		{
+			name:           "PutAccount OK with autoUpdateVersion",
+			expectedBody:   true,
+			requestType:    http.MethodPut,
+			requestPath:    "/api/accounts/" + accountID,
+			requestBody:    bytes.NewBufferString("{\"settings\": {\"auto_update_version\": \"latest\", \"peer_login_expiration\": 15552000,\"peer_login_expiration_enabled\": true},\"onboarding\": {\"onboarding_flow_pending\": true,\"signup_form_pending\": true}}"),
+			expectedStatus: http.StatusOK,
+			expectedSettings: api.AccountSettings{
+				PeerLoginExpiration:             15552000,
+				PeerLoginExpirationEnabled:      true,
+				GroupsPropagationEnabled:        br(false),
+				JwtGroupsClaimName:              sr(""),
+				JwtGroupsEnabled:                br(false),
+				JwtAllowGroups:                  &[]string{},
+				RegularUsersViewBlocked:         false,
+				RoutingPeerDnsResolutionEnabled: br(false),
+				LazyConnectionEnabled:           br(false),
+				DnsDomain:                       sr(""),
+				AutoUpdateVersion:               sr("latest"),
 			},
 			expectedArray: false,
 			expectedID:    accountID,
@@ -165,6 +190,7 @@ func TestAccounts_AccountsHandler(t *testing.T) {
 				RoutingPeerDnsResolutionEnabled: br(false),
 				LazyConnectionEnabled:           br(false),
 				DnsDomain:                       sr(""),
+				AutoUpdateVersion:               sr(""),
 			},
 			expectedArray: false,
 			expectedID:    accountID,
@@ -187,6 +213,7 @@ func TestAccounts_AccountsHandler(t *testing.T) {
 				RoutingPeerDnsResolutionEnabled: br(false),
 				LazyConnectionEnabled:           br(false),
 				DnsDomain:                       sr(""),
+				AutoUpdateVersion:               sr(""),
 			},
 			expectedArray: false,
 			expectedID:    accountID,
@@ -209,6 +236,7 @@ func TestAccounts_AccountsHandler(t *testing.T) {
 				RoutingPeerDnsResolutionEnabled: br(false),
 				LazyConnectionEnabled:           br(false),
 				DnsDomain:                       sr(""),
+				AutoUpdateVersion:               sr(""),
 			},
 			expectedArray: false,
 			expectedID:    accountID,

management/server/types/settings.go

@@ -52,6 +52,9 @@ type Settings struct {
 
 	// LazyConnectionEnabled indicates if the experimental feature is enabled or disabled
 	LazyConnectionEnabled bool `gorm:"default:false"`
+
+	// AutoUpdateVersion client auto-update version
+	AutoUpdateVersion string `gorm:"default:'disabled'"`
 }
 
 // Copy copies the Settings struct
@@ -72,6 +75,7 @@ func (s *Settings) Copy() *Settings {
 		LazyConnectionEnabled:           s.LazyConnectionEnabled,
 		DNSDomain:                       s.DNSDomain,
 		NetworkRange:                    s.NetworkRange,
+		AutoUpdateVersion:               s.AutoUpdateVersion,
 	}
 	if s.Extra != nil {
 		settings.Extra = s.Extra.Copy()

shared/management/http/api/openapi.yml

@@ -145,6 +145,10 @@ components:
           description: Enables or disables experimental lazy connection
           type: boolean
           example: true
+        auto_update_version:
+          description: Set Clients auto-update version. "latest", "disabled", or a specific version (e.g "0.50.1")
+          type: string
+          example: "0.51.2"
       required:
         - peer_login_expiration_enabled
         - peer_login_expiration

shared/management/http/api/types.gen.go

@@ -291,6 +291,9 @@ type AccountRequest struct {
 
 // AccountSettings defines model for AccountSettings.
 type AccountSettings struct {
+	// AutoUpdateVersion Set Clients auto-update version. "latest", "disabled", or a specific version (e.g "0.50.1")
+	AutoUpdateVersion *string `json:"auto_update_version,omitempty"`
+
 	// DnsDomain Allows to define a custom dns domain for the account
 	DnsDomain *string               `json:"dns_domain,omitempty"`
 	Extra     *AccountExtraSettings `json:"extra,omitempty"`

shared/management/proto/management.proto

@@ -280,6 +280,18 @@ message PeerConfig {
   bool LazyConnectionEnabled = 6;
 
   int32 mtu = 7;
+
+  // Auto-update config
+  AutoUpdateSettings autoUpdate = 8;
+}
+
+message AutoUpdateSettings {
+  string version = 1;
+  /*
+    alwaysUpdate = true → Updates happen automatically in the background
+    alwaysUpdate = false → Updates only happen when triggered by a peer connection
+   */
+  bool alwaysUpdate = 2;
 }
 
 // NetworkMap represents a network state of the peer with the corresponding configuration parameters to establish peer-to-peer connections

version/update.go

@@ -41,21 +41,28 @@ func NewUpdate(httpAgent string) *Update {
 		currentVersion, _ = goversion.NewVersion("0.0.0")
 	}
 
-	latestAvailable, _ := goversion.NewVersion("0.0.0")
-
 	u := &Update{
-		httpAgent:       httpAgent,
-		latestAvailable: latestAvailable,
-		uiVersion:       currentVersion,
-		fetchTicker:     time.NewTicker(fetchPeriod),
-		fetchDone:       make(chan struct{}),
+		httpAgent: httpAgent,
+		uiVersion: currentVersion,
+		fetchDone: make(chan struct{}),
 	}
-	go u.startFetcher()
+
+	return u
+}
+
+func NewUpdateAndStart(httpAgent string) *Update {
+	u := NewUpdate(httpAgent)
+	go u.StartFetcher()
+
 	return u
 }
 
 // StopWatch stop the version info fetch loop
 func (u *Update) StopWatch() {
+	if u.fetchTicker == nil {
+		return
+	}
+
 	u.fetchTicker.Stop()
 
 	select {
@@ -94,7 +101,18 @@ func (u *Update) SetOnUpdateListener(updateFn func()) {
 	}
 }
 
-func (u *Update) startFetcher() {
+func (u *Update) LatestVersion() *goversion.Version {
+	u.versionsLock.Lock()
+	defer u.versionsLock.Unlock()
+	return u.latestAvailable
+}
+
+func (u *Update) StartFetcher() {
+	if u.fetchTicker != nil {
+		return
+	}
+	u.fetchTicker = time.NewTicker(fetchPeriod)
+
 	if changed := u.fetchVersion(); changed {
 		u.checkUpdate()
 	}
@@ -181,6 +199,10 @@ func (u *Update) isUpdateAvailable() bool {
 	u.versionsLock.Lock()
 	defer u.versionsLock.Unlock()
 
+	if u.latestAvailable == nil {
+		return false
+	}
+
 	if u.latestAvailable.GreaterThan(u.uiVersion) {
 		return true
 	}

version/update_test.go

@@ -23,7 +23,7 @@ func TestNewUpdate(t *testing.T) {
 	wg.Add(1)
 
 	onUpdate := false
-	u := NewUpdate(httpAgent)
+	u := NewUpdateAndStart(httpAgent)
 	defer u.StopWatch()
 	u.SetOnUpdateListener(func() {
 		onUpdate = true
@@ -48,7 +48,7 @@ func TestDoNotUpdate(t *testing.T) {
 	wg.Add(1)
 
 	onUpdate := false
-	u := NewUpdate(httpAgent)
+	u := NewUpdateAndStart(httpAgent)
 	defer u.StopWatch()
 	u.SetOnUpdateListener(func() {
 		onUpdate = true
@@ -73,7 +73,7 @@ func TestDaemonUpdate(t *testing.T) {
 	wg.Add(1)
 
 	onUpdate := false
-	u := NewUpdate(httpAgent)
+	u := NewUpdateAndStart(httpAgent)
 	defer u.StopWatch()
 	u.SetOnUpdateListener(func() {
 		onUpdate = true