forgejo/models/asymkey/ssh_key_commit_verification.go
Gusted 0122943345
[GITEA] Add noreply email address as verified for SSH signed Git commits
- When someone really wants to avoid sharing their email, they could
configure git to use the noreply email for git commits. However if they
also wanted to use SSH signing, it would not show up as verified as the
noreply email address was technically not an activated email address for
the user.
- Add unit tests for the `ParseCommitWithSSHSignature` function.
- Resolves https://codeberg.org/Codeberg/Community/issues/946

(cherry picked from commit 1685de7eba)
(cherry picked from commit b1e8858de9)
(cherry picked from commit 1a6bf24d28)
2023-12-04 14:22:21 +01:00

86 lines
2.4 KiB
Go

// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package asymkey
import (
"bytes"
"context"
"fmt"
"strings"
"code.gitea.io/gitea/models/db"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"github.com/42wim/sshsig"
)
// ParseCommitWithSSHSignature check if signature is good against keystore.
func ParseCommitWithSSHSignature(ctx context.Context, c *git.Commit, committer *user_model.User) *CommitVerification {
// Now try to associate the signature with the committer, if present
if committer.ID != 0 {
keys, err := db.Find[PublicKey](ctx, FindPublicKeyOptions{
OwnerID: committer.ID,
NotKeytype: KeyTypePrincipal,
})
if err != nil { // Skipping failed to get ssh keys of user
log.Error("ListPublicKeys: %v", err)
return &CommitVerification{
CommittingUser: committer,
Verified: false,
Reason: "gpg.error.failed_retrieval_gpg_keys",
}
}
committerEmailAddresses, err := user_model.GetEmailAddresses(ctx, committer.ID)
if err != nil {
log.Error("GetEmailAddresses: %v", err)
}
// Add the noreply email address as verified address.
committerEmailAddresses = append(committerEmailAddresses, &user_model.EmailAddress{
IsActivated: true,
Email: committer.GetPlaceholderEmail(),
})
activated := false
for _, e := range committerEmailAddresses {
if e.IsActivated && strings.EqualFold(e.Email, c.Committer.Email) {
activated = true
break
}
}
for _, k := range keys {
if k.Verified && activated {
commitVerification := verifySSHCommitVerification(c.Signature.Signature, c.Signature.Payload, k, committer, committer, c.Committer.Email)
if commitVerification != nil {
return commitVerification
}
}
}
}
return &CommitVerification{
CommittingUser: committer,
Verified: false,
Reason: NoKeyFound,
}
}
func verifySSHCommitVerification(sig, payload string, k *PublicKey, committer, signer *user_model.User, email string) *CommitVerification {
if err := sshsig.Verify(bytes.NewBuffer([]byte(payload)), []byte(sig), []byte(k.Content), "git"); err != nil {
return nil
}
return &CommitVerification{ // Everything is ok
CommittingUser: committer,
Verified: true,
Reason: fmt.Sprintf("%s / %s", signer.Name, k.Fingerprint),
SigningUser: signer,
SigningSSHKey: k,
SigningEmail: email,
}
}