From 3daaaabe7ed22c17bff04d19c711be427bd2e225 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= Date: Mon, 22 Oct 2018 18:38:20 +0200 Subject: gpg-interface.c: support getting key fingerprint via %GF format MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Support processing VALIDSIG status that provides additional information for valid signatures. Use this information to propagate signing key fingerprint and expose it via %GF pretty format. This format can be used to build safer key verification systems that verify the key via complete fingerprint rather than short/long identifier provided by %GK. Signed-off-by: Michał Górny Signed-off-by: Junio C Hamano diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt index 6109ef0..8ab7d6d 100644 --- a/Documentation/pretty-formats.txt +++ b/Documentation/pretty-formats.txt @@ -153,6 +153,7 @@ endif::git-rev-list[] and "N" for no signature - '%GS': show the name of the signer for a signed commit - '%GK': show the key used to sign a signed commit +- '%GF': show the fingerprint of the key used to sign a signed commit - '%gD': reflog selector, e.g., `refs/stash@{1}` or `refs/stash@{2 minutes ago`}; the format follows the rules described for the `-g` option. The portion before the `@` is the refname as diff --git a/gpg-interface.c b/gpg-interface.c index 71618d8..1d33a7e 100644 --- a/gpg-interface.c +++ b/gpg-interface.c @@ -73,6 +73,7 @@ void signature_check_clear(struct signature_check *sigc) FREE_AND_NULL(sigc->gpg_status); FREE_AND_NULL(sigc->signer); FREE_AND_NULL(sigc->key); + FREE_AND_NULL(sigc->fingerprint); } /* An exclusive status -- only one of them can appear in output */ @@ -81,6 +82,8 @@ void signature_check_clear(struct signature_check *sigc) #define GPG_STATUS_KEYID (1<<1) /* The status includes user identifier */ #define GPG_STATUS_UID (1<<2) +/* The status includes key fingerprints */ +#define GPG_STATUS_FINGERPRINT (1<<3) /* Short-hand for standard exclusive *SIG status with keyid & UID */ #define GPG_STATUS_STDSIG (GPG_STATUS_EXCLUSIVE|GPG_STATUS_KEYID|GPG_STATUS_UID) @@ -98,6 +101,7 @@ static struct { { 'X', "EXPSIG ", GPG_STATUS_STDSIG }, { 'Y', "EXPKEYSIG ", GPG_STATUS_STDSIG }, { 'R', "REVKEYSIG ", GPG_STATUS_STDSIG }, + { 0, "VALIDSIG ", GPG_STATUS_FINGERPRINT }, }; static void parse_gpg_output(struct signature_check *sigc) @@ -123,7 +127,8 @@ static void parse_gpg_output(struct signature_check *sigc) goto found_duplicate_status; } - sigc->result = sigcheck_gpg_status[i].result; + if (sigcheck_gpg_status[i].result) + sigc->result = sigcheck_gpg_status[i].result; /* Do we have key information? */ if (sigcheck_gpg_status[i].flags & GPG_STATUS_KEYID) { next = strchrnul(line, ' '); @@ -137,6 +142,12 @@ static void parse_gpg_output(struct signature_check *sigc) sigc->signer = xmemdupz(line, next - line); } } + /* Do we have fingerprint? */ + if (sigcheck_gpg_status[i].flags & GPG_STATUS_FINGERPRINT) { + next = strchrnul(line, ' '); + free(sigc->fingerprint); + sigc->fingerprint = xmemdupz(line, next - line); + } break; } @@ -154,6 +165,7 @@ found_duplicate_status: */ sigc->result = 'E'; /* Clear partial data to avoid confusion */ + FREE_AND_NULL(sigc->fingerprint); FREE_AND_NULL(sigc->signer); FREE_AND_NULL(sigc->key); } diff --git a/gpg-interface.h b/gpg-interface.h index acf50c4..8ce614f 100644 --- a/gpg-interface.h +++ b/gpg-interface.h @@ -23,6 +23,7 @@ struct signature_check { char result; char *signer; char *key; + char *fingerprint; }; void signature_check_clear(struct signature_check *sigc); diff --git a/pretty.c b/pretty.c index 98cf522..b9caa9b 100644 --- a/pretty.c +++ b/pretty.c @@ -1256,6 +1256,10 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */ if (c->signature_check.key) strbuf_addstr(sb, c->signature_check.key); break; + case 'F': + if (c->signature_check.fingerprint) + strbuf_addstr(sb, c->signature_check.fingerprint); + break; default: return 0; } diff --git a/t/t7510-signed-commit.sh b/t/t7510-signed-commit.sh index 180f0be..19ccae2 100755 --- a/t/t7510-signed-commit.sh +++ b/t/t7510-signed-commit.sh @@ -175,8 +175,9 @@ test_expect_success GPG 'show good signature with custom format' ' G 13B6F51ECDDE430D C O Mitter + 73D758744BE721698EC54E8713B6F51ECDDE430D EOF - git log -1 --format="%G?%n%GK%n%GS" sixth-signed >actual && + git log -1 --format="%G?%n%GK%n%GS%n%GF" sixth-signed >actual && test_cmp expect actual ' @@ -185,8 +186,9 @@ test_expect_success GPG 'show bad signature with custom format' ' B 13B6F51ECDDE430D C O Mitter + EOF - git log -1 --format="%G?%n%GK%n%GS" $(cat forged1.commit) >actual && + git log -1 --format="%G?%n%GK%n%GS%n%GF" $(cat forged1.commit) >actual && test_cmp expect actual ' @@ -195,8 +197,9 @@ test_expect_success GPG 'show untrusted signature with custom format' ' U 61092E85B7227189 Eris Discordia + D4BE22311AD3131E5EDA29A461092E85B7227189 EOF - git log -1 --format="%G?%n%GK%n%GS" eighth-signed-alt >actual && + git log -1 --format="%G?%n%GK%n%GS%n%GF" eighth-signed-alt >actual && test_cmp expect actual ' @@ -205,8 +208,9 @@ test_expect_success GPG 'show unknown signature with custom format' ' E 61092E85B7227189 + EOF - GNUPGHOME="$GNUPGHOME_NOT_USED" git log -1 --format="%G?%n%GK%n%GS" eighth-signed-alt >actual && + GNUPGHOME="$GNUPGHOME_NOT_USED" git log -1 --format="%G?%n%GK%n%GS%n%GF" eighth-signed-alt >actual && test_cmp expect actual ' @@ -215,8 +219,9 @@ test_expect_success GPG 'show lack of signature with custom format' ' N + EOF - git log -1 --format="%G?%n%GK%n%GS" seventh-unsigned >actual && + git log -1 --format="%G?%n%GK%n%GS%n%GF" seventh-unsigned >actual && test_cmp expect actual ' @@ -255,8 +260,9 @@ test_expect_success GPG 'show double signature with custom format' ' E + EOF - git log -1 --format="%G?%n%GK%n%GS" $(cat double-commit.commit) >actual && + git log -1 --format="%G?%n%GK%n%GS%n%GF" $(cat double-commit.commit) >actual && test_cmp expect actual ' -- cgit v0.10.2-6-g49f6