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authorJunio C Hamano <gitster@pobox.com>2020-03-27 00:11:20 (GMT)
committerJunio C Hamano <gitster@pobox.com>2020-03-27 00:11:20 (GMT)
commitfa82be982dfc5b463a125991a2d381f1cd0ad9eb (patch)
tree6e67608a69b0c1a51a540c3c70e0b03c25646fd1
parentf8cb64e3d4d512a86c1b7b3aa584f11740b3d038 (diff)
parent67948981983b336eab2fa7e6a0e125d529391dfc (diff)
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Merge branch 'hi/gpg-prefer-check-signature'
The code to interface with GnuPG has been refactored. * hi/gpg-prefer-check-signature: gpg-interface: prefer check_signature() for GPG verification t: increase test coverage of signature verification output
-rw-r--r--builtin/fmt-merge-msg.c11
-rw-r--r--gpg-interface.c97
-rw-r--r--gpg-interface.h9
-rw-r--r--log-tree.c34
-rwxr-xr-xt/t4202-log.sh105
-rwxr-xr-xt/t6200-fmt-merge-msg.sh23
6 files changed, 201 insertions, 78 deletions
diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index 736f666..172dfbd 100644
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -494,6 +494,7 @@ static void fmt_merge_msg_sigs(struct strbuf *out)
enum object_type type;
unsigned long size, len;
char *buf = read_object_file(oid, &type, &size);
+ struct signature_check sigc = { 0 };
struct strbuf sig = STRBUF_INIT;
if (!buf || type != OBJ_TAG)
@@ -502,10 +503,12 @@ static void fmt_merge_msg_sigs(struct strbuf *out)
if (size == len)
; /* merely annotated */
- else if (verify_signed_buffer(buf, len, buf + len, size - len, &sig, NULL)) {
- if (!sig.len)
- strbuf_addstr(&sig, "gpg verification failed.\n");
- }
+ else if (check_signature(buf, len, buf + len, size - len, &sigc) &&
+ !sigc.gpg_output)
+ strbuf_addstr(&sig, "gpg verification failed.\n");
+ else
+ strbuf_addstr(&sig, sigc.gpg_output);
+ signature_check_clear(&sigc);
if (!tag_number++) {
fmt_tag_signature(&tagbuf, &sig, buf, len);
diff --git a/gpg-interface.c b/gpg-interface.c
index 165274d..2d538bc 100644
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -256,6 +256,55 @@ error:
FREE_AND_NULL(sigc->key);
}
+static int verify_signed_buffer(const char *payload, size_t payload_size,
+ const char *signature, size_t signature_size,
+ struct strbuf *gpg_output,
+ struct strbuf *gpg_status)
+{
+ struct child_process gpg = CHILD_PROCESS_INIT;
+ struct gpg_format *fmt;
+ struct tempfile *temp;
+ int ret;
+ struct strbuf buf = STRBUF_INIT;
+
+ temp = mks_tempfile_t(".git_vtag_tmpXXXXXX");
+ if (!temp)
+ return error_errno(_("could not create temporary file"));
+ if (write_in_full(temp->fd, signature, signature_size) < 0 ||
+ close_tempfile_gently(temp) < 0) {
+ error_errno(_("failed writing detached signature to '%s'"),
+ temp->filename.buf);
+ delete_tempfile(&temp);
+ return -1;
+ }
+
+ fmt = get_format_by_sig(signature);
+ if (!fmt)
+ BUG("bad signature '%s'", signature);
+
+ argv_array_push(&gpg.args, fmt->program);
+ argv_array_pushv(&gpg.args, fmt->verify_args);
+ argv_array_pushl(&gpg.args,
+ "--status-fd=1",
+ "--verify", temp->filename.buf, "-",
+ NULL);
+
+ if (!gpg_status)
+ gpg_status = &buf;
+
+ sigchain_push(SIGPIPE, SIG_IGN);
+ ret = pipe_command(&gpg, payload, payload_size,
+ gpg_status, 0, gpg_output, 0);
+ sigchain_pop(SIGPIPE);
+
+ delete_tempfile(&temp);
+
+ ret |= !strstr(gpg_status->buf, "\n[GNUPG:] GOODSIG ");
+ strbuf_release(&buf); /* no matter it was used or not */
+
+ return ret;
+}
+
int check_signature(const char *payload, size_t plen, const char *signature,
size_t slen, struct signature_check *sigc)
{
@@ -418,51 +467,3 @@ int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *sig
return 0;
}
-
-int verify_signed_buffer(const char *payload, size_t payload_size,
- const char *signature, size_t signature_size,
- struct strbuf *gpg_output, struct strbuf *gpg_status)
-{
- struct child_process gpg = CHILD_PROCESS_INIT;
- struct gpg_format *fmt;
- struct tempfile *temp;
- int ret;
- struct strbuf buf = STRBUF_INIT;
-
- temp = mks_tempfile_t(".git_vtag_tmpXXXXXX");
- if (!temp)
- return error_errno(_("could not create temporary file"));
- if (write_in_full(temp->fd, signature, signature_size) < 0 ||
- close_tempfile_gently(temp) < 0) {
- error_errno(_("failed writing detached signature to '%s'"),
- temp->filename.buf);
- delete_tempfile(&temp);
- return -1;
- }
-
- fmt = get_format_by_sig(signature);
- if (!fmt)
- BUG("bad signature '%s'", signature);
-
- argv_array_push(&gpg.args, fmt->program);
- argv_array_pushv(&gpg.args, fmt->verify_args);
- argv_array_pushl(&gpg.args,
- "--status-fd=1",
- "--verify", temp->filename.buf, "-",
- NULL);
-
- if (!gpg_status)
- gpg_status = &buf;
-
- sigchain_push(SIGPIPE, SIG_IGN);
- ret = pipe_command(&gpg, payload, payload_size,
- gpg_status, 0, gpg_output, 0);
- sigchain_pop(SIGPIPE);
-
- delete_tempfile(&temp);
-
- ret |= !strstr(gpg_status->buf, "\n[GNUPG:] GOODSIG ");
- strbuf_release(&buf); /* no matter it was used or not */
-
- return ret;
-}
diff --git a/gpg-interface.h b/gpg-interface.h
index 796571e..f4e9b4f 100644
--- a/gpg-interface.h
+++ b/gpg-interface.h
@@ -54,15 +54,6 @@ size_t parse_signature(const char *buf, size_t size);
int sign_buffer(struct strbuf *buffer, struct strbuf *signature,
const char *signing_key);
-/*
- * Run "gpg" to see if the payload matches the detached signature.
- * gpg_output, when set, receives the diagnostic output from GPG.
- * gpg_status, when set, receives the status output from GPG.
- */
-int verify_signed_buffer(const char *payload, size_t payload_size,
- const char *signature, size_t signature_size,
- struct strbuf *gpg_output, struct strbuf *gpg_status);
-
int git_gpg_config(const char *, const char *, void *);
void set_signing_key(const char *);
const char *get_signing_key(void);
diff --git a/log-tree.c b/log-tree.c
index 5212742..897a902 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -449,22 +449,21 @@ static void show_signature(struct rev_info *opt, struct commit *commit)
{
struct strbuf payload = STRBUF_INIT;
struct strbuf signature = STRBUF_INIT;
- struct strbuf gpg_output = STRBUF_INIT;
+ struct signature_check sigc = { 0 };
int status;
if (parse_signed_commit(commit, &payload, &signature) <= 0)
goto out;
- status = verify_signed_buffer(payload.buf, payload.len,
- signature.buf, signature.len,
- &gpg_output, NULL);
- if (status && !gpg_output.len)
- strbuf_addstr(&gpg_output, "No signature\n");
-
- show_sig_lines(opt, status, gpg_output.buf);
+ status = check_signature(payload.buf, payload.len, signature.buf,
+ signature.len, &sigc);
+ if (status && !sigc.gpg_output)
+ show_sig_lines(opt, status, "No signature\n");
+ else
+ show_sig_lines(opt, status, sigc.gpg_output);
+ signature_check_clear(&sigc);
out:
- strbuf_release(&gpg_output);
strbuf_release(&payload);
strbuf_release(&signature);
}
@@ -497,8 +496,9 @@ static int show_one_mergetag(struct commit *commit,
struct object_id oid;
struct tag *tag;
struct strbuf verify_message;
+ struct signature_check sigc = { 0 };
int status, nth;
- size_t payload_size, gpg_message_offset;
+ size_t payload_size;
hash_object_file(the_hash_algo, extra->value, extra->len,
type_name(OBJ_TAG), &oid);
@@ -520,19 +520,19 @@ static int show_one_mergetag(struct commit *commit,
else
strbuf_addf(&verify_message,
"parent #%d, tagged '%s'\n", nth + 1, tag->tag);
- gpg_message_offset = verify_message.len;
payload_size = parse_signature(extra->value, extra->len);
status = -1;
if (extra->len > payload_size) {
/* could have a good signature */
- if (!verify_signed_buffer(extra->value, payload_size,
- extra->value + payload_size,
- extra->len - payload_size,
- &verify_message, NULL))
- status = 0; /* good */
- else if (verify_message.len <= gpg_message_offset)
+ status = check_signature(extra->value, payload_size,
+ extra->value + payload_size,
+ extra->len - payload_size, &sigc);
+ if (sigc.gpg_output)
+ strbuf_addstr(&verify_message, sigc.gpg_output);
+ else
strbuf_addstr(&verify_message, "No signature\n");
+ signature_check_clear(&sigc);
/* otherwise we couldn't verify, which is shown as bad */
}
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 0f766ba..5eeb739 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -1627,6 +1627,66 @@ test_expect_success GPG 'log --graph --show-signature for merged tag in shallow
grep "tag signed_tag_shallow names a non-parent $hash" actual
'
+test_expect_success GPG 'log --graph --show-signature for merged tag with missing key' '
+ test_when_finished "git reset --hard && git checkout master" &&
+ git checkout -b plain-nokey master &&
+ echo aaa >bar &&
+ git add bar &&
+ git commit -m bar_commit &&
+ git checkout -b tagged-nokey master &&
+ echo bbb >baz &&
+ git add baz &&
+ git commit -m baz_commit &&
+ git tag -s -m signed_tag_msg signed_tag_nokey &&
+ git checkout plain-nokey &&
+ git merge --no-ff -m msg signed_tag_nokey &&
+ GNUPGHOME=. git log --graph --show-signature -n1 plain-nokey >actual &&
+ grep "^|\\\ merged tag" actual &&
+ grep "^| | gpg: Signature made" actual &&
+ grep "^| | gpg: Can'"'"'t check signature: \(public key not found\|No public key\)" actual
+'
+
+test_expect_success GPG 'log --graph --show-signature for merged tag with bad signature' '
+ test_when_finished "git reset --hard && git checkout master" &&
+ git checkout -b plain-bad master &&
+ echo aaa >bar &&
+ git add bar &&
+ git commit -m bar_commit &&
+ git checkout -b tagged-bad master &&
+ echo bbb >baz &&
+ git add baz &&
+ git commit -m baz_commit &&
+ git tag -s -m signed_tag_msg signed_tag_bad &&
+ git cat-file tag signed_tag_bad >raw &&
+ sed -e "s/signed_tag_msg/forged/" raw >forged &&
+ git hash-object -w -t tag forged >forged.tag &&
+ git checkout plain-bad &&
+ git merge --no-ff -m msg "$(cat forged.tag)" &&
+ git log --graph --show-signature -n1 plain-bad >actual &&
+ grep "^|\\\ merged tag" actual &&
+ grep "^| | gpg: Signature made" actual &&
+ grep "^| | gpg: BAD signature from" actual
+'
+
+test_expect_success GPG 'log --show-signature for merged tag with GPG failure' '
+ test_when_finished "git reset --hard && git checkout master" &&
+ git checkout -b plain-fail master &&
+ echo aaa >bar &&
+ git add bar &&
+ git commit -m bar_commit &&
+ git checkout -b tagged-fail master &&
+ echo bbb >baz &&
+ git add baz &&
+ git commit -m baz_commit &&
+ git tag -s -m signed_tag_msg signed_tag_fail &&
+ git checkout plain-fail &&
+ git merge --no-ff -m msg signed_tag_fail &&
+ TMPDIR="$(pwd)/bogus" git log --show-signature -n1 plain-fail >actual &&
+ grep "^merged tag" actual &&
+ grep "^No signature" actual &&
+ ! grep "^gpg: Signature made" actual
+'
+
test_expect_success GPGSM 'log --graph --show-signature for merged tag x509' '
test_when_finished "git reset --hard && git checkout master" &&
test_config gpg.format x509 &&
@@ -1648,6 +1708,51 @@ test_expect_success GPGSM 'log --graph --show-signature for merged tag x509' '
grep "^| | gpgsm: Good signature" actual
'
+test_expect_success GPGSM 'log --graph --show-signature for merged tag x509 missing key' '
+ test_when_finished "git reset --hard && git checkout master" &&
+ test_config gpg.format x509 &&
+ test_config user.signingkey $GIT_COMMITTER_EMAIL &&
+ git checkout -b plain-x509-nokey master &&
+ echo aaa >bar &&
+ git add bar &&
+ git commit -m bar_commit &&
+ git checkout -b tagged-x509-nokey master &&
+ echo bbb >baz &&
+ git add baz &&
+ git commit -m baz_commit &&
+ git tag -s -m signed_tag_msg signed_tag_x509_nokey &&
+ git checkout plain-x509-nokey &&
+ git merge --no-ff -m msg signed_tag_x509_nokey &&
+ GNUPGHOME=. git log --graph --show-signature -n1 plain-x509-nokey >actual &&
+ grep "^|\\\ merged tag" actual &&
+ grep "^| | gpgsm: certificate not found" actual
+'
+
+test_expect_success GPGSM 'log --graph --show-signature for merged tag x509 bad signature' '
+ test_when_finished "git reset --hard && git checkout master" &&
+ test_config gpg.format x509 &&
+ test_config user.signingkey $GIT_COMMITTER_EMAIL &&
+ git checkout -b plain-x509-bad master &&
+ echo aaa >bar &&
+ git add bar &&
+ git commit -m bar_commit &&
+ git checkout -b tagged-x509-bad master &&
+ echo bbb >baz &&
+ git add baz &&
+ git commit -m baz_commit &&
+ git tag -s -m signed_tag_msg signed_tag_x509_bad &&
+ git cat-file tag signed_tag_x509_bad >raw &&
+ sed -e "s/signed_tag_msg/forged/" raw >forged &&
+ git hash-object -w -t tag forged >forged.tag &&
+ git checkout plain-x509-bad &&
+ git merge --no-ff -m msg "$(cat forged.tag)" &&
+ git log --graph --show-signature -n1 plain-x509-bad >actual &&
+ grep "^|\\\ merged tag" actual &&
+ grep "^| | gpgsm: Signature made" actual &&
+ grep "^| | gpgsm: invalid signature" actual
+'
+
+
test_expect_success GPG '--no-show-signature overrides --show-signature' '
git log -1 --show-signature --no-show-signature signed >actual &&
! grep "^gpg:" actual
diff --git a/t/t6200-fmt-merge-msg.sh b/t/t6200-fmt-merge-msg.sh
index 8a72b4c..b15582a 100755
--- a/t/t6200-fmt-merge-msg.sh
+++ b/t/t6200-fmt-merge-msg.sh
@@ -6,6 +6,7 @@
test_description='fmt-merge-msg test'
. ./test-lib.sh
+. "$TEST_DIRECTORY/lib-gpg.sh"
test_expect_success setup '
echo one >one &&
@@ -73,6 +74,10 @@ test_expect_success setup '
apos="'\''"
'
+test_expect_success GPG 'set up a signed tag' '
+ git tag -s -m signed-tag-msg signed-good-tag left
+'
+
test_expect_success 'message for merging local branch' '
echo "Merge branch ${apos}left${apos}" >expected &&
@@ -83,6 +88,24 @@ test_expect_success 'message for merging local branch' '
test_cmp expected actual
'
+test_expect_success GPG 'message for merging local tag signed by good key' '
+ git checkout master &&
+ git fetch . signed-good-tag &&
+ git fmt-merge-msg <.git/FETCH_HEAD >actual 2>&1 &&
+ grep "^Merge tag ${apos}signed-good-tag${apos}" actual &&
+ grep "^# gpg: Signature made" actual &&
+ grep "^# gpg: Good signature from" actual
+'
+
+test_expect_success GPG 'message for merging local tag signed by unknown key' '
+ git checkout master &&
+ git fetch . signed-good-tag &&
+ GNUPGHOME=. git fmt-merge-msg <.git/FETCH_HEAD >actual 2>&1 &&
+ grep "^Merge tag ${apos}signed-good-tag${apos}" actual &&
+ grep "^# gpg: Signature made" actual &&
+ grep "^# gpg: Can${apos}t check signature: \(public key not found\|No public key\)" actual
+'
+
test_expect_success 'message for merging external branch' '
echo "Merge branch ${apos}left${apos} of $(pwd)" >expected &&