A security vulnerability that was fixed in #9840 had the potential to corrupt the `authorized_keys` file that Forgejo is managing to allow ssh access. In the event that it was corrupted, the existing behaviour of Forgejo is to maintain the contents that it finds in the `authorized_keys` file, potentially making an exploit of a Forgejo server persistent despite attempts to rewrite the key file.
This feature adds a new layer of security resiliency in order to prevent persistent ssh key corruption. When Forgejo starts up, if relevant, Forgejo will read the `authorized_keys` file and validate the file's contents. If any keys are found in the file that are not expected, then Forgejo will terminate its startup in order to signal to the server administrator that a critical security risk is present that must be addressed:
```
2025/11/07 10:13:50 modules/ssh/init.go:86:Init() [F] An unexpected ssh public key was discovered. Forgejo will shutdown to require this to be fixed. Fix by either:
Option 1: Delete the file /home/forgejo/.ssh/authorized_keys, and Forgejo will recreate it with only expected ssh public keys.
Option 2: Permit unexpected keys by setting [server].SSH_ALLOW_UNEXPECTED_AUTHORIZED_KEYS=true in Forgejo's config file.
Unexpected key on line 1 of /home/forgejo/.ssh/authorized_keys
Unexpected key on line 2 of /home/forgejo/.ssh/authorized_keys
Unexpected key on line 3 of /home/forgejo/.ssh/authorized_keys
Unexpected key on line 4 of /home/forgejo/.ssh/authorized_keys
Unexpected key on line 5 of /home/forgejo/.ssh/authorized_keys
```
As noted in the log message, the server administrator can address this problem in one of two ways:
- If they delete the file that contains the unexpected keys, Forgejo will regenerate it containing only the expected keys from the Forgejo database.
- If they would like to run their server with ssh keys that are not managed by Forgejo (for example, if they're reusing a `git` ssh user that is accessed through `git@server` and does not invoke Forgejo's ssh handlers), then they can disable the new security check by setting `[server].SSH_ALLOW_UNEXPECTED_AUTHORIZED_KEYS = true` in their `app.ini`.
**This is a breaking change**: the default behaviour is to be restrictive in the contents of `authorized_keys` in order to ensure that server administrators with unexpected keys in `authorized_keys` are aware of those keys.
If `SSH_ALLOW_UNEXPECTED_AUTHORIZED_KEYS=false`, then the behaviour when Forgejo rewrites the `authorized_keys` file is changed to not maintain any unexpected keys in the file. If the value is `true`, then the old behaviour is retained.
The `doctor check` subcommand is updated to use the new validity routines:
```
[4] Check if OpenSSH authorized_keys file is up-to-date
- [E] Unexpected key on line 1 of /home/forgejo/.ssh/authorized_keys
- [E] Key in database is not present in /home/forgejo/.ssh/authorized_keys: ...
- [E] authorized_keys file "/home/forgejo/.ssh/authorized_keys" contains validity errors.
Regenerate it with:
"forgejo admin regenerate keys"
or
"forgejo doctor check --run authorized-keys --fix"
ERROR
```
## Checklist
The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).
### Tests
- I added test coverage for Go changes...
- [x] in their respective `*_test.go` for unit tests.
- [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I added test coverage for JavaScript changes...
- [ ] in `web_src/js/*.test.js` if it can be unit tested.
- [ ] in `tests/e2e/*.test.e2e.js` if it requires interactions with a live Forgejo server (see also the [developer guide for JavaScript testing](https://codeberg.org/forgejo/forgejo/src/branch/forgejo/tests/e2e/README.md#end-to-end-tests)).
### Documentation
- [x] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- **Documentation updates required**; pending initial reviews of this change.
- [ ] I did not document these changes and I do not expect someone else to do it.
### Release notes
- [ ] I do not want this change to show in the release notes.
- [ ] I want the title to show in the release notes with a link to this pull request.
- [x] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/10010
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: mfenniak <mfenniak@noreply.codeberg.org>
Co-committed-by: mfenniak <mfenniak@noreply.codeberg.org>
To audit access to our forgejo-instance we currently need to enable debug ssh-logs. It turns out a single log become multiple events in a k8s/container setup. To have our log-collectors properly join these events, we would like to indent them similar to what some stacktraces look like.
This PR would change
```
2025/09/08 07:18:53 ...eb/routing/logger.go:102:func1() [I] Serv Results:
IsWiki: %t
DeployKeyID: %d
KeyID: %d KeyName: %s
UserName: %s
UserID: %d
OwnerName: %s
RepoName: %s
RepoID: %d
```
to
```
2025/09/08 07:18:53 ...eb/routing/logger.go:102:func1() [I] Serv Results:
IsWiki: %t
DeployKeyID: %d
KeyID: %d KeyName: %s
UserName: %s
UserID: %d
OwnerName: %s
RepoName: %s
RepoID: %d
```
Furthermore to standardize user configuration of ssh-logs I have added `LOGGER_SSH_MODE` . It can be configured like router-logger. By doing so we can change the log-LEVEL to debug for ssh without changing other loggers. This would deprecate `ENABLE_SSH_LOG`.
## Checklist
The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).
### Documentation
- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [x] I did not document these changes and I do not expect someone else to do it.
### Release notes
- [x] I do not want this change to show in the release notes.
- [ ] I want the title to show in the release notes with a link to this pull request.
- [ ] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.
<!--start release-notes-assistant-->
## Release notes
<!--URL:https://codeberg.org/forgejo/forgejo-->
- Features
- [PR](https://codeberg.org/forgejo/forgejo/pulls/9056): <!--number 9056 --><!--line 0 --><!--description ZmVhdChsb2cpOiBiZXR0ZXIgcGFyc2VhYmxlIGFuZCBjb25maWd1cmFibGUgc3NoLWxvZ3M=-->feat(log): better parseable and configurable ssh-logs<!--description-->
<!--end release-notes-assistant-->
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9056
Reviewed-by: Lucas <sclu1034@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: zokki <zokki.softwareschmiede@gmail.com>
Co-committed-by: zokki <zokki.softwareschmiede@gmail.com>
Change all license headers to comply with REUSE specification.
Fix#16132
Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
The graceful manager waits for 4 listeners to be created or to be told that they are not needed. If it is not told about them it will indefinitely and timeout.
This leads to SVC hosts not being told of being in the readyState but on Unix would lead to the termination of the process.
There was an unfortunate regression in #20299 which missed this subtly and in the case whereby SSH is disabled the `builtinUnused()` is not called.
This PR adds a call to `builtinUnused()` when not using the builtin ssh to allow `createServerWaitGroup.Done()` to be called.
In addition it was noted that the if/else clauses for timeout informing of the SVC host were in the wrong order. These have been swapped.
Fix#20609
