From 434060ec6d9bf50f095db901da3fb9b557e11df1 Mon Sep 17 00:00:00 2001 From: "brian m. carlson" Date: Sun, 21 Jun 2015 23:14:40 +0000 Subject: [PATCH] gpg: centralize signature check verify-commit and verify-tag both share a central codepath for verifying commits: check_signature. However, verify-tag exited successfully for untrusted signature, while verify-commit exited unsuccessfully. Centralize this signature check and make verify-commit adopt the older verify-tag behavior. This behavior is more logical anyway, as the signature is in fact valid, whether or not there's a path of trust to the author. Signed-off-by: brian m. carlson Signed-off-by: Junio C Hamano --- builtin/verify-commit.c | 5 +++-- builtin/verify-tag.c | 5 +++-- commit.c | 8 ++++++-- commit.h | 2 +- gpg-interface.c | 4 +++- gpg-interface.h | 2 +- t/t7510-signed-commit.sh | 2 +- 7 files changed, 18 insertions(+), 10 deletions(-) diff --git a/builtin/verify-commit.c b/builtin/verify-commit.c index ec0c4e3d83..e30f7cfbc1 100644 --- a/builtin/verify-commit.c +++ b/builtin/verify-commit.c @@ -21,10 +21,11 @@ static const char * const verify_commit_usage[] = { static int run_gpg_verify(const unsigned char *sha1, const char *buf, unsigned long size, int verbose) { struct signature_check signature_check; + int ret; memset(&signature_check, 0, sizeof(signature_check)); - check_commit_signature(lookup_commit(sha1), &signature_check); + ret = check_commit_signature(lookup_commit(sha1), &signature_check); if (verbose && signature_check.payload) fputs(signature_check.payload, stdout); @@ -33,7 +34,7 @@ static int run_gpg_verify(const unsigned char *sha1, const char *buf, unsigned l fputs(signature_check.gpg_output, stderr); signature_check_clear(&signature_check); - return signature_check.result != 'G'; + return ret; } static int verify_commit(const char *name, int verbose) diff --git a/builtin/verify-tag.c b/builtin/verify-tag.c index e1eb341bae..8750bef016 100644 --- a/builtin/verify-tag.c +++ b/builtin/verify-tag.c @@ -22,6 +22,7 @@ static int run_gpg_verify(const char *buf, unsigned long size, int verbose) { struct signature_check sigc; int len; + int ret; memset(&sigc, 0, sizeof(sigc)); @@ -32,11 +33,11 @@ static int run_gpg_verify(const char *buf, unsigned long size, int verbose) if (size == len) return error("no signature found"); - check_signature(buf, len, buf + len, size - len, &sigc); + ret = check_signature(buf, len, buf + len, size - len, &sigc); fputs(sigc.gpg_output, stderr); signature_check_clear(&sigc); - return sigc.result != 'G' && sigc.result != 'U'; + return ret; } static int verify_tag(const char *name, int verbose) diff --git a/commit.c b/commit.c index d07a984985..909419a13b 100644 --- a/commit.c +++ b/commit.c @@ -1227,20 +1227,24 @@ static void handle_signed_tag(struct commit *parent, struct commit_extra_header free(buf); } -void check_commit_signature(const struct commit *commit, struct signature_check *sigc) +int check_commit_signature(const struct commit *commit, struct signature_check *sigc) { struct strbuf payload = STRBUF_INIT; struct strbuf signature = STRBUF_INIT; + int ret = 1; sigc->result = 'N'; if (parse_signed_commit(commit, &payload, &signature) <= 0) goto out; - check_signature(payload.buf, payload.len, signature.buf, signature.len, sigc); + ret = check_signature(payload.buf, payload.len, signature.buf, + signature.len, sigc); out: strbuf_release(&payload); strbuf_release(&signature); + + return ret; } diff --git a/commit.h b/commit.h index 9f189cb054..afa0f6f041 100644 --- a/commit.h +++ b/commit.h @@ -375,7 +375,7 @@ extern void print_commit_list(struct commit_list *list, * at all. This may allocate memory for sig->gpg_output, sig->gpg_status, * sig->signer and sig->key. */ -extern void check_commit_signature(const struct commit *commit, struct signature_check *sigc); +extern int check_commit_signature(const struct commit *commit, struct signature_check *sigc); int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused); diff --git a/gpg-interface.c b/gpg-interface.c index 66dbee25b3..77a4da627e 100644 --- a/gpg-interface.c +++ b/gpg-interface.c @@ -60,7 +60,7 @@ void parse_gpg_output(struct signature_check *sigc) } } -void check_signature(const char *payload, size_t plen, const char *signature, +int check_signature(const char *payload, size_t plen, const char *signature, size_t slen, struct signature_check *sigc) { struct strbuf gpg_output = STRBUF_INIT; @@ -81,6 +81,8 @@ void check_signature(const char *payload, size_t plen, const char *signature, out: strbuf_release(&gpg_status); strbuf_release(&gpg_output); + + return sigc->result != 'G' && sigc->result != 'U'; } /* diff --git a/gpg-interface.h b/gpg-interface.h index 043bcaa630..e2aabde305 100644 --- a/gpg-interface.h +++ b/gpg-interface.h @@ -27,7 +27,7 @@ extern int verify_signed_buffer(const char *payload, size_t payload_size, const extern int git_gpg_config(const char *, const char *, void *); extern void set_signing_key(const char *); extern const char *get_signing_key(void); -extern void check_signature(const char *payload, size_t plen, +extern int check_signature(const char *payload, size_t plen, const char *signature, size_t slen, struct signature_check *sigc); #endif diff --git a/t/t7510-signed-commit.sh b/t/t7510-signed-commit.sh index 4fc376edb6..796138fc3d 100755 --- a/t/t7510-signed-commit.sh +++ b/t/t7510-signed-commit.sh @@ -81,7 +81,7 @@ test_expect_success GPG 'verify and show signatures' ' ) ' -test_expect_failure GPG 'verify-commit exits success on untrusted signature' ' +test_expect_success GPG 'verify-commit exits success on untrusted signature' ' git verify-commit eighth-signed-alt 2>actual && grep "Good signature from" actual && ! grep "BAD signature from" actual &&