[PATCH 1/2] ssh signing: fmt-merge-msg tests & config parse

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When merging a signed tag fmt-merge-msg was unable to verify its
validity missing the necessary ssh allowedSignersFile config.

Adds gpg config parsing to fmt-merge-msg.
Adds tests for ssh signed tags to fmt-merge-msg tests.

Signed-off-by: Fabian Stelzer <fs@xxxxxxxxxxxx>
---
 fmt-merge-msg.c          |  6 ++++++
 t/t6200-fmt-merge-msg.sh | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/fmt-merge-msg.c b/fmt-merge-msg.c
index fb300bb4b6..2d49584bf5 100644
--- a/fmt-merge-msg.c
+++ b/fmt-merge-msg.c
@@ -9,6 +9,7 @@
 #include "branch.h"
 #include "fmt-merge-msg.h"
 #include "commit-reach.h"
+#include "gpg-interface.h"
 
 static int use_branch_desc;
 static int suppress_dest_pattern_seen;
@@ -16,6 +17,8 @@ static struct string_list suppress_dest_patterns = STRING_LIST_INIT_DUP;
 
 int fmt_merge_msg_config(const char *key, const char *value, void *cb)
 {
+	int status = 0;
+
 	if (!strcmp(key, "merge.log") || !strcmp(key, "merge.summary")) {
 		int is_bool;
 		merge_log_config = git_config_bool_or_int(key, value, &is_bool);
@@ -34,6 +37,9 @@ int fmt_merge_msg_config(const char *key, const char *value, void *cb)
 			string_list_append(&suppress_dest_patterns, value);
 		suppress_dest_pattern_seen = 1;
 	} else {
+		status = git_gpg_config(key, value, NULL);
+		if (status)
+			return status;
 		return git_default_config(key, value, cb);
 	}
 	return 0;
diff --git a/t/t6200-fmt-merge-msg.sh b/t/t6200-fmt-merge-msg.sh
index 44f55d93fe..06c5fb5615 100755
--- a/t/t6200-fmt-merge-msg.sh
+++ b/t/t6200-fmt-merge-msg.sh
@@ -81,6 +81,16 @@ test_expect_success GPG 'set up a signed tag' '
 	git tag -s -m signed-tag-msg signed-good-tag left
 '
 
+test_expect_success GPGSSH 'created ssh signed commit and tag' '
+	test_config gpg.format ssh &&
+	git checkout -b signed-ssh &&
+	touch file &&
+	git add file &&
+	git commit -m "ssh signed" -S"${GPGSSH_KEY_PRIMARY}" &&
+	git tag -s -u"${GPGSSH_KEY_PRIMARY}" -m signed-ssh-tag-msg signed-good-ssh-tag left &&
+	git tag -s -u"${GPGSSH_KEY_UNTRUSTED}" -m signed-ssh-tag-msg-untrusted signed-untrusted-ssh-tag left
+'
+
 test_expect_success 'message for merging local branch' '
 	echo "Merge branch ${apos}left${apos}" >expected &&
 
@@ -109,6 +119,24 @@ test_expect_success GPG 'message for merging local tag signed by unknown key' '
 	grep -E "^# gpg: Can${apos}t check signature: (public key not found|No public key)" actual
 '
 
+test_expect_success GPGSSH 'message for merging local tag signed by good ssh key' '
+	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
+	git checkout main &&
+	git fetch . signed-good-ssh-tag &&
+	git fmt-merge-msg <.git/FETCH_HEAD >actual 2>&1 &&
+	grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
+	! grep "${GPGSSH_BAD_SIGNATURE}" actual
+'
+
+test_expect_success GPGSSH 'message for merging local tag signed by unknown ssh key' '
+	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
+	git checkout main &&
+	git fetch . signed-untrusted-ssh-tag &&
+	git fmt-merge-msg <.git/FETCH_HEAD >actual 2>&1 &&
+	grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
+	! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
+	grep "${GPGSSH_KEY_NOT_TRUSTED}" actual
+'
 test_expect_success 'message for merging external branch' '
 	echo "Merge branch ${apos}left${apos} of $(pwd)" >expected &&
 
-- 
2.31.1




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