gpg: centralize signature check

verify-commit and verify-tag both share a central codepath for verifying
commits: check_signature.  However, verify-tag exited successfully for
untrusted signature, while verify-commit exited unsuccessfully.
Centralize this signature check and make verify-commit adopt the older
verify-tag behavior.  This behavior is more logical anyway, as the
signature is in fact valid, whether or not there's a path of trust to
the author.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/commit.c b/commit.c
index d07a984985..909419a13b 100644
--- a/commit.c
+++ b/commit.c
@@ -1227,20 +1227,24 @@ free_return:
 	free(buf);
 }
 
-void check_commit_signature(const struct commit *commit, struct signature_check *sigc)
+int check_commit_signature(const struct commit *commit, struct signature_check *sigc)
 {
 	struct strbuf payload = STRBUF_INIT;
 	struct strbuf signature = STRBUF_INIT;
+	int ret = 1;
 
 	sigc->result = 'N';
 
 	if (parse_signed_commit(commit, &payload, &signature) <= 0)
 		goto out;
-	check_signature(payload.buf, payload.len, signature.buf, signature.len, sigc);
+	ret = check_signature(payload.buf, payload.len, signature.buf,
+		signature.len, sigc);
 
  out:
 	strbuf_release(&payload);
 	strbuf_release(&signature);
+
+	return ret;
 }