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mirror of https://github.com/go-gitea/gitea.git synced 2024-12-04 14:46:57 -05:00
gitea/modules/git/repo_gpg.go
zeripath fcb535c5c3
Sign merges, CRUD, Wiki and Repository initialisation with gpg key (#7631)
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.
2019-10-16 14:42:42 +01:00

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1.8 KiB
Go

// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package git
import (
"fmt"
"strings"
"code.gitea.io/gitea/modules/process"
)
// LoadPublicKeyContent will load the key from gpg
func (gpgSettings *GPGSettings) LoadPublicKeyContent() error {
content, stderr, err := process.GetManager().Exec(
"gpg -a --export",
"gpg", "-a", "--export", gpgSettings.KeyID)
if err != nil {
return fmt.Errorf("Unable to get default signing key: %s, %s, %v", gpgSettings.KeyID, stderr, err)
}
gpgSettings.PublicKeyContent = content
return nil
}
// GetDefaultPublicGPGKey will return and cache the default public GPG settings for this repository
func (repo *Repository) GetDefaultPublicGPGKey(forceUpdate bool) (*GPGSettings, error) {
if repo.gpgSettings != nil && !forceUpdate {
return repo.gpgSettings, nil
}
gpgSettings := &GPGSettings{
Sign: true,
}
value, _ := NewCommand("config", "--get", "commit.gpgsign").RunInDir(repo.Path)
sign, valid := ParseBool(strings.TrimSpace(value))
if !sign || !valid {
gpgSettings.Sign = false
repo.gpgSettings = gpgSettings
return gpgSettings, nil
}
signingKey, _ := NewCommand("config", "--get", "user.signingkey").RunInDir(repo.Path)
gpgSettings.KeyID = strings.TrimSpace(signingKey)
defaultEmail, _ := NewCommand("config", "--get", "user.email").RunInDir(repo.Path)
gpgSettings.Email = strings.TrimSpace(defaultEmail)
defaultName, _ := NewCommand("config", "--get", "user.name").RunInDir(repo.Path)
gpgSettings.Name = strings.TrimSpace(defaultName)
if err := gpgSettings.LoadPublicKeyContent(); err != nil {
return nil, err
}
repo.gpgSettings = gpgSettings
return repo.gpgSettings, nil
}