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Diffstat (limited to 'services/asymkey/commit.go')
-rw-r--r--services/asymkey/commit.go154
1 files changed, 91 insertions, 63 deletions
diff --git a/services/asymkey/commit.go b/services/asymkey/commit.go
index 105782a93a..54ef052a50 100644
--- a/services/asymkey/commit.go
+++ b/services/asymkey/commit.go
@@ -6,6 +6,7 @@ package asymkey
import (
"context"
"fmt"
+ "slices"
"strings"
asymkey_model "code.gitea.io/gitea/models/asymkey"
@@ -23,47 +24,44 @@ import (
// ParseCommitWithSignature check if signature is good against keystore.
func ParseCommitWithSignature(ctx context.Context, c *git.Commit) *asymkey_model.CommitVerification {
- var committer *user_model.User
- if c.Committer != nil {
- var err error
- // Find Committer account
- committer, err = user_model.GetUserByEmail(ctx, c.Committer.Email) // This finds the user by primary email or activated email so commit will not be valid if email is not
- if err != nil { // Skipping not user for committer
- committer = &user_model.User{
- Name: c.Committer.Name,
- Email: c.Committer.Email,
- }
- // We can expect this to often be an ErrUserNotExist. in the case
- // it is not, however, it is important to log it.
- if !user_model.IsErrUserNotExist(err) {
- log.Error("GetUserByEmail: %v", err)
- return &asymkey_model.CommitVerification{
- CommittingUser: committer,
- Verified: false,
- Reason: "gpg.error.no_committer_account",
- }
- }
+ committer, err := user_model.GetUserByEmail(ctx, c.Committer.Email)
+ if err != nil && !user_model.IsErrUserNotExist(err) {
+ log.Error("GetUserByEmail: %v", err)
+ return &asymkey_model.CommitVerification{
+ Verified: false,
+ Reason: "gpg.error.no_committer_account", // this error is not right, but such error should seldom happen
}
}
-
return ParseCommitWithSignatureCommitter(ctx, c, committer)
}
+// ParseCommitWithSignatureCommitter parses a commit's GPG or SSH signature.
+// The caller guarantees that the committer user is related to the commit by checking its activated email addresses or no-reply address.
+// If the commit is singed by an instance key, then committer can be nil.
+// If the signature exists, even if committer is nil, the returned CommittingUser will be a non-nil fake user (e.g.: instance key)
func ParseCommitWithSignatureCommitter(ctx context.Context, c *git.Commit, committer *user_model.User) *asymkey_model.CommitVerification {
- // If no signature just report the committer
+ // If no signature, just report the committer
if c.Signature == nil {
return &asymkey_model.CommitVerification{
CommittingUser: committer,
- Verified: false, // Default value
- Reason: "gpg.error.not_signed_commit", // Default value
+ Verified: false,
+ Reason: "gpg.error.not_signed_commit",
+ }
+ }
+ // to support instance key, we need a fake committer user (not really needed, but legacy code accesses the committer without nil-check)
+ if committer == nil {
+ committer = &user_model.User{
+ Name: c.Committer.Name,
+ Email: c.Committer.Email,
}
}
-
- // If this a SSH signature handle it differently
if strings.HasPrefix(c.Signature.Signature, "-----BEGIN SSH SIGNATURE-----") {
- return ParseCommitWithSSHSignature(ctx, c, committer)
+ return parseCommitWithSSHSignature(ctx, c, committer)
}
+ return parseCommitWithGPGSignature(ctx, c, committer)
+}
+func parseCommitWithGPGSignature(ctx context.Context, c *git.Commit, committer *user_model.User) *asymkey_model.CommitVerification {
// Parsing signature
sig, err := asymkey_model.ExtractSignature(c.Signature.Signature)
if err != nil { // Skipping failed to extract sign
@@ -117,20 +115,11 @@ func ParseCommitWithSignatureCommitter(ctx context.Context, c *git.Commit, commi
}
}
- committerEmailAddresses, _ := cache.GetWithContextCache(ctx, cachegroup.UserEmailAddresses, committer.ID, user_model.GetEmailAddresses)
- activated := false
- for _, e := range committerEmailAddresses {
- if e.IsActivated && strings.EqualFold(e.Email, c.Committer.Email) {
- activated = true
- break
- }
- }
-
for _, k := range keys {
// Pre-check (& optimization) that emails attached to key can be attached to the committer email and can validate
canValidate := false
email := ""
- if k.Verified && activated {
+ if k.Verified {
canValidate = true
email = c.Committer.Email
}
@@ -164,7 +153,7 @@ func ParseCommitWithSignatureCommitter(ctx context.Context, c *git.Commit, commi
}
if err := gpgSettings.LoadPublicKeyContent(); err != nil {
log.Error("Error getting default signing key: %s %v", gpgSettings.KeyID, err)
- } else if commitVerification := VerifyWithGPGSettings(ctx, &gpgSettings, sig, c.Signature.Payload, committer, keyID); commitVerification != nil {
+ } else if commitVerification := verifyWithGPGSettings(ctx, &gpgSettings, sig, c.Signature.Payload, committer, keyID); commitVerification != nil {
if commitVerification.Reason == asymkey_model.BadSignature {
defaultReason = asymkey_model.BadSignature
} else {
@@ -179,7 +168,7 @@ func ParseCommitWithSignatureCommitter(ctx context.Context, c *git.Commit, commi
} else if defaultGPGSettings == nil {
log.Warn("Unable to get defaultGPGSettings for unattached commit: %s", c.ID.String())
} else if defaultGPGSettings.Sign {
- if commitVerification := VerifyWithGPGSettings(ctx, defaultGPGSettings, sig, c.Signature.Payload, committer, keyID); commitVerification != nil {
+ if commitVerification := verifyWithGPGSettings(ctx, defaultGPGSettings, sig, c.Signature.Payload, committer, keyID); commitVerification != nil {
if commitVerification.Reason == asymkey_model.BadSignature {
defaultReason = asymkey_model.BadSignature
} else {
@@ -220,8 +209,8 @@ func checkKeyEmails(ctx context.Context, email string, keys ...*asymkey_model.GP
return true, e.Email
}
}
- if user.KeepEmailPrivate && strings.EqualFold(email, user.GetEmail()) {
- return true, user.GetEmail()
+ if user != nil && strings.EqualFold(email, user.GetPlaceholderEmail()) {
+ return true, user.GetPlaceholderEmail()
}
}
}
@@ -294,7 +283,7 @@ func HashAndVerifyForKeyID(ctx context.Context, sig *packet.Signature, payload s
}
}
-func VerifyWithGPGSettings(ctx context.Context, gpgSettings *git.GPGSettings, sig *packet.Signature, payload string, committer *user_model.User, keyID string) *asymkey_model.CommitVerification {
+func verifyWithGPGSettings(ctx context.Context, gpgSettings *git.GPGSettings, sig *packet.Signature, payload string, committer *user_model.User, keyID string) *asymkey_model.CommitVerification {
// First try to find the key in the db
if commitVerification := HashAndVerifyForKeyID(ctx, sig, payload, committer, gpgSettings.KeyID, gpgSettings.Name, gpgSettings.Email); commitVerification != nil {
return commitVerification
@@ -359,39 +348,41 @@ func VerifyWithGPGSettings(ctx context.Context, gpgSettings *git.GPGSettings, si
return nil
}
-// ParseCommitWithSSHSignature check if signature is good against keystore.
-func ParseCommitWithSSHSignature(ctx context.Context, c *git.Commit, committer *user_model.User) *asymkey_model.CommitVerification {
+func verifySSHCommitVerificationByInstanceKey(c *git.Commit, committerUser, signerUser *user_model.User, committerGitEmail, publicKeyContent string) *asymkey_model.CommitVerification {
+ fingerprint, err := asymkey_model.CalcFingerprint(publicKeyContent)
+ if err != nil {
+ log.Error("Error calculating the fingerprint public key %q, err: %v", publicKeyContent, err)
+ return nil
+ }
+ sshPubKey := &asymkey_model.PublicKey{
+ Verified: true,
+ Content: publicKeyContent,
+ Fingerprint: fingerprint,
+ HasUsed: true,
+ }
+ return verifySSHCommitVerification(c.Signature.Signature, c.Signature.Payload, sshPubKey, committerUser, signerUser, committerGitEmail)
+}
+
+// parseCommitWithSSHSignature check if signature is good against keystore.
+func parseCommitWithSSHSignature(ctx context.Context, c *git.Commit, committerUser *user_model.User) *asymkey_model.CommitVerification {
// Now try to associate the signature with the committer, if present
- if committer.ID != 0 {
+ if committerUser.ID != 0 {
keys, err := db.Find[asymkey_model.PublicKey](ctx, asymkey_model.FindPublicKeyOptions{
- OwnerID: committer.ID,
+ OwnerID: committerUser.ID,
NotKeytype: asymkey_model.KeyTypePrincipal,
})
if err != nil { // Skipping failed to get ssh keys of user
log.Error("ListPublicKeys: %v", err)
return &asymkey_model.CommitVerification{
- CommittingUser: committer,
+ CommittingUser: committerUser,
Verified: false,
Reason: "gpg.error.failed_retrieval_gpg_keys",
}
}
- committerEmailAddresses, err := cache.GetWithContextCache(ctx, cachegroup.UserEmailAddresses, committer.ID, user_model.GetEmailAddresses)
- if err != nil {
- log.Error("GetEmailAddresses: %v", err)
- }
-
- 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 k.Verified {
+ commitVerification := verifySSHCommitVerification(c.Signature.Signature, c.Signature.Payload, k, committerUser, committerUser, c.Committer.Email)
if commitVerification != nil {
return commitVerification
}
@@ -399,8 +390,45 @@ func ParseCommitWithSSHSignature(ctx context.Context, c *git.Commit, committer *
}
}
+ // Try the pre-set trusted keys (for key-rotation purpose)
+ // At the moment, we still use the SigningName&SigningEmail for the rotated keys.
+ // Maybe in the future we can extend the key format to "ssh-xxx .... old-user@example.com" to support different signer emails.
+ for _, k := range setting.Repository.Signing.TrustedSSHKeys {
+ signerUser := &user_model.User{
+ Name: setting.Repository.Signing.SigningName,
+ Email: setting.Repository.Signing.SigningEmail,
+ }
+ commitVerification := verifySSHCommitVerificationByInstanceKey(c, committerUser, signerUser, c.Committer.Email, k)
+ if commitVerification != nil && commitVerification.Verified {
+ return commitVerification
+ }
+ }
+
+ // Try the configured instance-wide SSH public key
+ if setting.Repository.Signing.SigningFormat == git.SigningKeyFormatSSH && !slices.Contains([]string{"", "default", "none"}, setting.Repository.Signing.SigningKey) {
+ gpgSettings := git.GPGSettings{
+ Sign: true,
+ KeyID: setting.Repository.Signing.SigningKey,
+ Name: setting.Repository.Signing.SigningName,
+ Email: setting.Repository.Signing.SigningEmail,
+ Format: setting.Repository.Signing.SigningFormat,
+ }
+ signerUser := &user_model.User{
+ Name: gpgSettings.Name,
+ Email: gpgSettings.Email,
+ }
+ if err := gpgSettings.LoadPublicKeyContent(); err != nil {
+ log.Error("Error getting instance-wide SSH signing key %q, err: %v", gpgSettings.KeyID, err)
+ } else {
+ commitVerification := verifySSHCommitVerificationByInstanceKey(c, committerUser, signerUser, gpgSettings.Email, gpgSettings.PublicKeyContent)
+ if commitVerification != nil && commitVerification.Verified {
+ return commitVerification
+ }
+ }
+ }
+
return &asymkey_model.CommitVerification{
- CommittingUser: committer,
+ CommittingUser: committerUser,
Verified: false,
Reason: asymkey_model.NoKeyFound,
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-27 08:10:34 +0000