[PR #6777] [MERGED] [client] preserve WireGuard key on interactive re-login #28951

New Issue

saavagebueno · 2026-08-05T08:07:12-04:00

saavagebueno commented

2026-08-05 08:07:12 -04:00

📋 Pull Request Information

Original PR: https://github.com/netbirdio/netbird/pull/6777
Author: @pappz
Created: 7/15/2026
Status: ✅ Merged
Merged: 7/15/2026
Merged by: @pappz

Base: 0.74.6-branch ← Head: fix/ios-relogin

📝 Commits (1)

bf9ee48 fix(ios): preserve WireGuard key on interactive re-login

📊 Changes

1 file changed (+16 additions, -1 deletions)

View changed files

📝 client/ios/NetBirdSDK/login.go (+16 -1)

📄 Description

NewAuth built a fresh in-memory config on every call via CreateInMemoryConfig, which generates a new WireGuard private key when none is set. The iOS Swift layer calls this on interactive re-login and writes the resulting config back to the profile's netbird.cfg, so each re-auth replaced the peer's persisted private key with a new one. A new key means a new public key, so the management server registered a brand-new peer on every re-authentication — named after the fallback hostname.

Load the existing config with DirectUpdateOrCreateConfig when a config file is already present so re-login reuses the peer's persisted private key (and its identity). Only fall back to a fresh in-memory config for the first-time login when no config file exists yet (or after logout, which deletes the file). DirectUpdateOrCreateConfig uses non-atomic writes so it also works inside the tvOS App Group sandbox. This matches what Run() and LoginForMobile() already do.

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Is it a bug fix
Is a typo/documentation fix
Is a feature enhancement
It is a refactor
Created tests that fail without the change (if possible)
This change does not modify the public API, gRPC protocols, functionality behavior, CLI / service flags, or introduce a new feature — OR I have discussed it with the NetBird team beforehand (link the issue / Slack thread in the description). See CONTRIBUTING.md.

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Paste the PR link from https://github.com/netbirdio/docs here:

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Summary by CodeRabbit

New Features
- Added support for loading or creating persistent configuration when a configuration file path is provided.
- Continued support for in-memory configuration for temporary or first-time use.

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/netbirdio/netbird/pull/6777 **Author:** [@pappz](https://github.com/pappz) **Created:** 7/15/2026 **Status:** ✅ Merged **Merged:** 7/15/2026 **Merged by:** [@pappz](https://github.com/pappz) **Base:** `0.74.6-branch` ← **Head:** `fix/ios-relogin` --- ### 📝 Commits (1) - [`bf9ee48`](https://github.com/netbirdio/netbird/commit/bf9ee488defe7ba427a8058e08835b7501216db4) fix(ios): preserve WireGuard key on interactive re-login ### 📊 Changes **1 file changed** (+16 additions, -1 deletions) <details> <summary>View changed files</summary> 📝 `client/ios/NetBirdSDK/login.go` (+16 -1) </details> ### 📄 Description NewAuth built a fresh in-memory config on every call via CreateInMemoryConfig, which generates a new WireGuard private key when none is set. The iOS Swift layer calls this on interactive re-login and writes the resulting config back to the profile's netbird.cfg, so each re-auth replaced the peer's persisted private key with a new one. A new key means a new public key, so the management server registered a brand-new peer on every re-authentication — named after the fallback hostname. Load the existing config with DirectUpdateOrCreateConfig when a config file is already present so re-login reuses the peer's persisted private key (and its identity). Only fall back to a fresh in-memory config for the first-time login when no config file exists yet (or after logout, which deletes the file). DirectUpdateOrCreateConfig uses non-atomic writes so it also works inside the tvOS App Group sandbox. This matches what Run() and LoginForMobile() already do. ## Describe your changes ## Issue ticket number and link ## Stack  ### Checklist - [x] Is it a bug fix - [ ] Is a typo/documentation fix - [ ] Is a feature enhancement - [ ] It is a refactor - [ ] Created tests that fail without the change (if possible) - [ ] This change does **not** modify the public API, gRPC protocols, functionality behavior, CLI / service flags, or introduce a new feature — **OR** I have discussed it with the NetBird team beforehand (link the issue / Slack thread in the description). See [CONTRIBUTING.md](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTING.md#discuss-changes-with-the-netbird-team-first). > By submitting this pull request, you confirm that you have read and agree to the terms of the [Contributor License Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md). ## Documentation Select exactly one: - [ ] I added/updated documentation for this change - [x] Documentation is **not needed** for this change (explain why) ### Docs PR URL (required if "docs added" is checked) Paste the PR link from https://github.com/netbirdio/docs here: https://github.com/netbirdio/docs/pull/__  ## Summary by CodeRabbit * **New Features** * Added support for loading or creating persistent configuration when a configuration file path is provided. * Continued support for in-memory configuration for temporary or first-time use.  --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

saavagebueno added the pull-request label 2026-08-05 08:07:12 -04:00

saavagebueno closed this issue

2026-08-05 08:07:12 -04:00

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Reference: DYNR/netbird#28951