diff options
| -rw-r--r-- | Documentation/git-fast-import.adoc | 7 | ||||
| -rw-r--r-- | builtin/fast-import.c | 40 | ||||
| -rwxr-xr-x | t/t9306-fast-import-signed-tags.sh | 73 |
3 files changed, 110 insertions, 10 deletions
diff --git a/Documentation/git-fast-import.adoc b/Documentation/git-fast-import.adoc index 288f2b2a7e..d68bc52b7e 100644 --- a/Documentation/git-fast-import.adoc +++ b/Documentation/git-fast-import.adoc @@ -66,11 +66,10 @@ fast-import stream! This option is enabled automatically for remote-helpers that use the `import` capability, as they are already trusted to run their own code. -`--signed-tags=(verbatim|warn-verbatim|warn-strip|strip|abort)`:: +`--signed-tags=<mode>`:: Specify how to handle signed tags. Behaves in the same way as - the `--signed-commits=<mode>` below, except that the - `strip-if-invalid` mode is not yet supported. Like for signed - commits, the default mode is `verbatim`. + the `--signed-commits=<mode>` below. Like for signed commits, + the default mode is `verbatim`. `--signed-commits=<mode>`:: Specify how to handle signed commits. The following <mode>s diff --git a/builtin/fast-import.c b/builtin/fast-import.c index 08ea27242d..5e89829aea 100644 --- a/builtin/fast-import.c +++ b/builtin/fast-import.c @@ -3089,7 +3089,34 @@ static void parse_new_commit(const char *arg) b->last_commit = object_count_by_type[OBJ_COMMIT]; } -static void handle_tag_signature(struct strbuf *msg, const char *name) +static void handle_tag_signature_if_invalid(struct strbuf *buf, + struct strbuf *msg, + size_t sig_offset) +{ + struct strbuf signature = STRBUF_INIT; + struct strbuf payload = STRBUF_INIT; + struct signature_check sigc = { 0 }; + + strbuf_addbuf(&payload, buf); + strbuf_addch(&payload, '\n'); + strbuf_add(&payload, msg->buf, sig_offset); + strbuf_add(&signature, msg->buf + sig_offset, msg->len - sig_offset); + + sigc.payload_type = SIGNATURE_PAYLOAD_TAG; + sigc.payload = strbuf_detach(&payload, &sigc.payload_len); + + if (!check_signature(&sigc, signature.buf, signature.len)) + goto out; + + strbuf_setlen(msg, sig_offset); + +out: + signature_check_clear(&sigc); + strbuf_release(&signature); + strbuf_release(&payload); +} + +static void handle_tag_signature(struct strbuf *buf, struct strbuf *msg, const char *name) { size_t sig_offset = parse_signed_buffer(msg->buf, msg->len); @@ -3115,6 +3142,9 @@ static void handle_tag_signature(struct strbuf *msg, const char *name) /* Truncate the buffer to remove the signature */ strbuf_setlen(msg, sig_offset); break; + case SIGN_STRIP_IF_INVALID: + handle_tag_signature_if_invalid(buf, msg, sig_offset); + break; /* Third, aborting modes */ case SIGN_ABORT: @@ -3123,9 +3153,6 @@ static void handle_tag_signature(struct strbuf *msg, const char *name) case SIGN_ABORT_IF_INVALID: die(_("'abort-if-invalid' is not a valid mode for " "git fast-import with --signed-tags=<mode>")); - case SIGN_STRIP_IF_INVALID: - die(_("'strip-if-invalid' is not a valid mode for " - "git fast-import with --signed-tags=<mode>")); case SIGN_SIGN_IF_INVALID: die(_("'sign-if-invalid' is not a valid mode for " "git fast-import with --signed-tags=<mode>")); @@ -3198,8 +3225,6 @@ static void parse_new_tag(const char *arg) /* tag payload/message */ parse_data(&msg, 0, NULL); - handle_tag_signature(&msg, t->name); - /* build the tag object */ strbuf_reset(&new_data); @@ -3211,6 +3236,9 @@ static void parse_new_tag(const char *arg) if (tagger) strbuf_addf(&new_data, "tagger %s\n", tagger); + + handle_tag_signature(&new_data, &msg, t->name); + strbuf_addch(&new_data, '\n'); strbuf_addbuf(&new_data, &msg); free(tagger); diff --git a/t/t9306-fast-import-signed-tags.sh b/t/t9306-fast-import-signed-tags.sh index 363619e7d1..fd43b0b52a 100755 --- a/t/t9306-fast-import-signed-tags.sh +++ b/t/t9306-fast-import-signed-tags.sh @@ -77,4 +77,77 @@ test_expect_success GPGSSH 'import SSH signed tag with --signed-tags=strip' ' test_grep ! "SSH SIGNATURE" out ' +for mode in strip-if-invalid +do + test_expect_success GPG "import tag with no signature with --signed-tags=$mode" ' + test_when_finished rm -rf import && + git init import && + + git fast-export --signed-tags=verbatim >output && + git -C import fast-import --quiet --signed-tags=$mode <output >log 2>&1 && + test_must_be_empty log + ' + + test_expect_success GPG "keep valid OpenPGP signature with --signed-tags=$mode" ' + test_when_finished rm -rf import && + git init import && + + git fast-export --signed-tags=verbatim openpgp-signed >output && + git -C import fast-import --quiet --signed-tags=$mode <output >log 2>&1 && + IMPORTED=$(git -C import rev-parse --verify refs/tags/openpgp-signed) && + test $OPENPGP_SIGNED = $IMPORTED && + git -C import cat-file tag "$IMPORTED" >actual && + test_grep -E "^-----BEGIN PGP SIGNATURE-----" actual && + test_must_be_empty log + ' + + test_expect_success GPG "handle signature invalidated by message change with --signed-tags=$mode" ' + test_when_finished rm -rf import && + git init import && + + git fast-export --signed-tags=verbatim openpgp-signed >output && + + # Change the tag message, which invalidates the signature. The tag + # message length should not change though, otherwise the corresponding + # `data <length>` command would have to be changed too. + sed "s/OpenPGP signed tag/OpenPGP forged tag/" output >modified && + + git -C import fast-import --quiet --signed-tags=$mode <modified >log 2>&1 && + + IMPORTED=$(git -C import rev-parse --verify refs/tags/openpgp-signed) && + test $OPENPGP_SIGNED != $IMPORTED && + git -C import cat-file tag "$IMPORTED" >actual && + test_grep ! -E "^-----BEGIN PGP SIGNATURE-----" actual && + test_must_be_empty log + ' + + test_expect_success GPGSM "keep valid X.509 signature with --signed-tags=$mode" ' + test_when_finished rm -rf import && + git init import && + + git fast-export --signed-tags=verbatim x509-signed >output && + git -C import fast-import --quiet --signed-tags=$mode <output >log 2>&1 && + IMPORTED=$(git -C import rev-parse --verify refs/tags/x509-signed) && + test $X509_SIGNED = $IMPORTED && + git -C import cat-file tag x509-signed >actual && + test_grep -E "^-----BEGIN SIGNED MESSAGE-----" actual && + test_must_be_empty log + ' + + test_expect_success GPGSSH "keep valid SSH signature with --signed-tags=$mode" ' + test_when_finished rm -rf import && + git init import && + + test_config -C import gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" && + + git fast-export --signed-tags=verbatim ssh-signed >output && + git -C import fast-import --quiet --signed-tags=$mode <output >log 2>&1 && + IMPORTED=$(git -C import rev-parse --verify refs/tags/ssh-signed) && + test $SSH_SIGNED = $IMPORTED && + git -C import cat-file tag ssh-signed >actual && + test_grep -E "^-----BEGIN SSH SIGNATURE-----" actual && + test_must_be_empty log + ' +done + test_done |