This PR fixes#7598 by providing a configurable way of signing commits across the Gitea instance. Per repository configurability and import/generation of trusted secure keys is not provided by this PR - from a security PoV that's probably impossible to do properly. Similarly web-signing, that is asking the user to sign something, is not implemented - this could be done at a later stage however.
## Features
- [x] If commit.gpgsign is set in .gitconfig sign commits and files created through repofiles. (merges should already have been signed.)
- [x] Verify commits signed with the default gpg as valid
- [x] Signer, Committer and Author can all be different
- [x] Allow signer to be arbitrarily different - We still require the key to have an activated email on Gitea. A more complete implementation would be to use a keyserver and mark external-or-unactivated with an "unknown" trust level icon.
- [x] Add a signing-key.gpg endpoint to get the default gpg pub key if available
- Rather than add a fake web-flow user I've added this as an endpoint on /api/v1/signing-key.gpg
- [x] Try to match the default key with a user on gitea - this is done at verification time
- [x] Make things configurable?
- app.ini configuration done
- [x] when checking commits are signed need to check if they're actually verifiable too
- [x] Add documentation
I have decided that adjusting the docker to create a default gpg key is not the correct thing to do and therefore have not implemented this.
resolves git conflicts from #3896 (credit to @belak, in case github doesn't keep original author during squash)
Co-Authored-By: Matti Ranta <techknowlogick@gitea.io>
* Rename BaseLogger to WriterLogger to help the creation of other providers
* Don't export ColorBytes and ResetBytes from ColoredValues
* Make integration tests only print logs if they fail
* check can color before coloring
* I always forget about MSSQL
* Oh and use LEVEL in sqlite.ini
* Make the test logger log at info - as it means you see the router
* Remove empty expected changes
* Make the migrations quieter too
* Don't display SQL on error - it can be looked at in the file logs if necessary
* Fix skip when using onGiteaRun
