[PR #5173] feat(trust): Add server trust establishment with CA install and certificate pinning (T-5.7) #25166

New Issue

saavagebueno · 2026-08-05T06:09:37-04:00

saavagebueno commented

2026-08-05 06:09:37 -04:00

Original Pull Request: https://github.com/netbirdio/netbird/pull/5173

State: closed
Merged: No

Summary

Add certificate pinning support (sha256//BASE64 format) for management server verification
Implement CA certificate installation to Windows Trusted Root store (certutil -addstore)
Support backup pins for certificate rotation scenarios
Add comprehensive unit tests for all pin verification scenarios

Changes

New Files

client/internal/tunnel/trust_windows.go - Windows implementation with CA install
client/internal/tunnel/trust_other.go - Non-Windows stub (pinning only)
client/internal/tunnel/trust_test.go - Unit tests (17 test cases)

Key Functions

Function	Purpose
`VerifyServerCert()`	TLS verification callback with pinning support
`InstallCACert()`	Install CA to Windows Trusted Root store
`RemoveCACert()`	Remove CA by thumbprint (cleanup)
`GetCertPin()`	Calculate SHA-256 pin from file/bytes/x509
`TrustBootstrap()`	Complete trust establishment workflow

Configuration

# Option 1: CA Certificate Installation
management_ca_cert: "C:\\ProgramData\\NetBird\\mgmt-ca.crt"

# Option 2: Certificate Pinning (tighter security)
management_cert_pin: "sha256//ABC123..."
management_cert_pin_backup: "sha256//XYZ789..."  # For rotation

Test plan

Unit tests pass locally (go test ./client/internal/tunnel/...)
go vet passes
CI tests pass
Integration test: Bootstrap with pinned certificate

Closes #53

🤖 Generated with Claude Code

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/5173 **State:** closed **Merged:** No --- ## Summary - Add certificate pinning support (`sha256//BASE64` format) for management server verification - Implement CA certificate installation to Windows Trusted Root store (`certutil -addstore`) - Support backup pins for certificate rotation scenarios - Add comprehensive unit tests for all pin verification scenarios ## Changes ### New Files - `client/internal/tunnel/trust_windows.go` - Windows implementation with CA install - `client/internal/tunnel/trust_other.go` - Non-Windows stub (pinning only) - `client/internal/tunnel/trust_test.go` - Unit tests (17 test cases) ### Key Functions | Function | Purpose | |----------|---------| | `VerifyServerCert()` | TLS verification callback with pinning support | | `InstallCACert()` | Install CA to Windows Trusted Root store | | `RemoveCACert()` | Remove CA by thumbprint (cleanup) | | `GetCertPin()` | Calculate SHA-256 pin from file/bytes/x509 | | `TrustBootstrap()` | Complete trust establishment workflow | ### Configuration ```yaml # Option 1: CA Certificate Installation management_ca_cert: "C:\\ProgramData\\NetBird\\mgmt-ca.crt" # Option 2: Certificate Pinning (tighter security) management_cert_pin: "sha256//ABC123..." management_cert_pin_backup: "sha256//XYZ789..." # For rotation ``` ## Test plan - [x] Unit tests pass locally (`go test ./client/internal/tunnel/...`) - [x] `go vet` passes - [ ] CI tests pass - [ ] Integration test: Bootstrap with pinned certificate ## Related Closes #53 🤖 Generated with [Claude Code](https://claude.com/claude-code)

saavagebueno added the pull-request label 2026-08-05 06:09:37 -04:00

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Reference: DYNR/netbird#25166