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gpg-interface: check gpg signature creation status

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When we create a signature, it may happen that gpg returns with
"success" but not with an actual detached signature on stdout.

Check for the correct signature creation status to catch these cases
better. Really, --status-fd parsing is the only way to check gpg status
reliably. We do the same for verify already.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael J Gruber 2016-06-17 19:38:59 -04:00 committed by Junio C Hamano
parent 0581b54641
commit efee9553a4
2 changed files with 14 additions and 3 deletions
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8
gpg-interface.c
View File

@ -153,9 +153,11 @@ int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *sig
struct child_process gpg = CHILD_PROCESS_INIT;
int ret;
size_t i, j, bottom;
struct strbuf gpg_status = STRBUF_INIT;
argv_array_pushl(&gpg.args,
gpg_program,
"--status-fd=2",
"-bsau", signing_key,
NULL);
@ -167,10 +169,12 @@ int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *sig
*/
sigchain_push(SIGPIPE, SIG_IGN);
ret = pipe_command(&gpg, buffer->buf, buffer->len,
signature, 1024, NULL, 0);
signature, 1024, &gpg_status, 0);
sigchain_pop(SIGPIPE);
if (ret || signature->len == bottom)
ret |= !strstr(gpg_status.buf, "\n[GNUPG:] SIG_CREATED ");
strbuf_release(&gpg_status);
if (ret)
return error(_("gpg failed to sign the data"));
/* Strip CR from the line endings, in case we are on Windows. */

9
t/t7004-tag.sh
View File

@ -1202,10 +1202,17 @@ test_expect_success GPG,RFC1991 \
# try to sign with bad user.signingkey
git config user.signingkey BobTheMouse
test_expect_success GPG \
'git tag -s fails if gpg is misconfigured' \
'git tag -s fails if gpg is misconfigured (bad key)' \
'test_must_fail git tag -s -m tail tag-gpg-failure'
git config --unset user.signingkey
# try to produce invalid signature
test_expect_success GPG \
'git tag -s fails if gpg is misconfigured (bad signature format)' \
'test_config gpg.program echo &&
test_must_fail git tag -s -m tail tag-gpg-failure'
# try to verify without gpg:
rm -rf gpghome