[PATCH v2 4/6] ssh signing: make git log verify key lifetime

From

Fabian Stelzer <fs@gigacodes.de>

Date

Oct 27, 2021, 08:06 UTC

Message-ID

<20211027080616.619956-5-fs@gigacodes.de>

In-Reply-To

<20211027080616.619956-1-fs@gigacodes.de>

Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
---
 log-tree.c     |  2 ++
 t/t4202-log.sh | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/log-tree.c b/log-tree.c
index a46cf60e1e..d3e7a40b64 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -513,6 +513,7 @@ static void show_signature(struct rev_info *opt, struct commit *commit)
 	if (parse_signed_commit(commit, &payload, &signature, the_hash_algo) <= 0)
 		goto out;
 
+	sigc.payload_type = SIGNATURE_PAYLOAD_COMMIT;
 	sigc.payload = strbuf_detach(&payload, &sigc.payload_len);
 	status = check_signature(&sigc, signature.buf, signature.len);
 	if (status && !sigc.output)
@@ -583,6 +584,7 @@ static int show_one_mergetag(struct commit *commit,
 	status = -1;
 	if (parse_signature(extra->value, extra->len, &payload, &signature)) {
 		/* could have a good signature */
+		sigc.payload_type = SIGNATURE_PAYLOAD_TAG;
 		sigc.payload = strbuf_detach(&payload, &sigc.payload_len);
 		status = check_signature(&sigc, signature.buf, signature.len);
 		if (sigc.output)
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 6a650dacd6..2b12baab77 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -1626,6 +1626,24 @@ test_expect_success GPGSSH 'setup sshkey signed branch' '
 	git commit -S -m signed_commit
 '
 
+test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'create signed commits with keys having defined lifetimes' '
+	test_config gpg.format ssh &&
+	touch file &&
+	git add file &&
+
+	echo expired >file && test_tick && git commit -a -m expired -S"${GPGSSH_KEY_EXPIRED}" &&
+	git tag expired-signed &&
+
+	echo notyetvalid >file && test_tick && git commit -a -m notyetvalid -S"${GPGSSH_KEY_NOTYETVALID}" &&
+	git tag notyetvalid-signed &&
+
+	echo timeboxedvalid >file && test_tick && git commit -a -m timeboxedvalid -S"${GPGSSH_KEY_TIMEBOXEDVALID}" &&
+	git tag timeboxedvalid-signed &&
+
+	echo timeboxedinvalid >file && test_tick && git commit -a -m timeboxedinvalid -S"${GPGSSH_KEY_TIMEBOXEDINVALID}" &&
+	git tag timeboxedinvalid-signed
+'
+
 test_expect_success GPGSM 'log x509 fingerprint' '
 	echo "F8BF62E0693D0694816377099909C779FA23FD65 | " >expect &&
 	git log -n1 --format="%GF | %GP" signed-x509 >actual &&
@@ -1663,6 +1681,31 @@ test_expect_success GPGSSH 'log --graph --show-signature ssh' '
 	grep "${GOOD_SIGNATURE_TRUSTED}" actual
 '
 
+test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'log shows failure on expired signature key' '
+	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
+	git log --graph --show-signature -n1 expired-signed >actual &&
+	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
+'
+
+test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'log shows failure on not yet valid signature key' '
+	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
+	git log --graph --show-signature -n1 notyetvalid-signed >actual &&
+	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
+'
+
+test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'log show success with commit date and key validity matching' '
+	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
+	git log --graph --show-signature -n1 timeboxedvalid-signed >actual &&
+	grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
+	! grep "${GPGSSH_BAD_SIGNATURE}" actual
+'
+
+test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'log shows failure with commit date outside of key validity' '
+	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
+	git log --graph --show-signature -n1 timeboxedinvalid-signed >actual &&
+	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
+'
+
 test_expect_success GPG 'log --graph --show-signature for merged tag' '
 	test_when_finished "git reset --hard && git checkout main" &&
 	git checkout -b plain main &&

-- 
2.31.1