From 8a0bb7cd040b17e6c6c3d75b4b76051953253c31 Mon Sep 17 00:00:00 2001
From: zeripath <art27@cantab.net>
Date: Mon, 6 Jul 2020 19:33:34 +0100
Subject: [PATCH] Ensure Subkeys are verified (#12155)

When attempting to verify subkeys the email address verification step
requires checking the emails however, these emails are not stored on
subkeys but instead on the primary key.

This PR will obtain the primaryKey and check against these emails too.

Fix #12128

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
---
 models/gpg_key.go | 42 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/models/gpg_key.go b/models/gpg_key.go
index 49e510839f..309d914bbc 100644
--- a/models/gpg_key.go
+++ b/models/gpg_key.go
@@ -509,6 +509,18 @@ func hashAndVerifyForKeyID(sig *packet.Signature, payload string, committer *Use
 		return nil
 	}
 	for _, key := range keys {
+		var primaryKeys []*GPGKey
+		if key.PrimaryKeyID != "" {
+			primaryKeys, err = GetGPGKeysByKeyID(key.PrimaryKeyID)
+			if err != nil {
+				log.Error("GetGPGKeysByKeyID: %v", err)
+				return &CommitVerification{
+					CommittingUser: committer,
+					Verified:       false,
+					Reason:         "gpg.error.failed_retrieval_gpg_keys",
+				}
+			}
+		}
 		activated := false
 		if len(email) != 0 {
 			for _, e := range key.Emails {
@@ -518,6 +530,20 @@ func hashAndVerifyForKeyID(sig *packet.Signature, payload string, committer *Use
 					break
 				}
 			}
+			if !activated {
+				for _, pkey := range primaryKeys {
+					for _, e := range pkey.Emails {
+						if e.IsActivated && strings.EqualFold(e.Email, email) {
+							activated = true
+							email = e.Email
+							break
+						}
+					}
+					if activated {
+						break
+					}
+				}
+			}
 		} else {
 			for _, e := range key.Emails {
 				if e.IsActivated {
@@ -526,7 +552,22 @@ func hashAndVerifyForKeyID(sig *packet.Signature, payload string, committer *Use
 					break
 				}
 			}
+			if !activated {
+				for _, pkey := range primaryKeys {
+					for _, e := range pkey.Emails {
+						if e.IsActivated {
+							activated = true
+							email = e.Email
+							break
+						}
+					}
+					if activated {
+						break
+					}
+				}
+			}
 		}
+
 		if !activated {
 			continue
 		}
@@ -614,7 +655,6 @@ func ParseCommitWithSignature(c *git.Commit) *CommitVerification {
 	if keyID == "" && sig.IssuerFingerprint != nil && len(sig.IssuerFingerprint) > 0 {
 		keyID = fmt.Sprintf("%X", sig.IssuerFingerprint[12:20])
 	}
-
 	defaultReason := NoKeyFound
 
 	// First check if the sig has a keyID and if so just look at that