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git/builtin/verify-tag.c
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/* | |
* Builtin "git verify-tag" | |
* | |
* Copyright (c) 2007 Carlos Rica <jasampler@gmail.com> | |
* | |
* Based on git-verify-tag.sh | |
*/ | |
#include "cache.h" | |
#include "builtin.h" | |
#include "tag.h" | |
#include "run-command.h" | |
#include <signal.h> | |
#include "parse-options.h" | |
#include "gpg-interface.h" | |
static const char * const verify_tag_usage[] = { | |
N_("git verify-tag [-v | --verbose] <tag>..."), | |
NULL | |
}; | |
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)); | |
len = parse_signature(buf, size); | |
if (size == len) { | |
if (verbose) | |
write_in_full(1, buf, len); | |
return error("no signature found"); | |
} | |
ret = check_signature(buf, len, buf + len, size - len, &sigc); | |
print_signature_buffer(&sigc, verbose ? GPG_VERIFY_VERBOSE : 0); | |
signature_check_clear(&sigc); | |
return ret; | |
} | |
static int verify_tag(const char *name, int verbose) | |
{ | |
enum object_type type; | |
unsigned char sha1[20]; | |
char *buf; | |
unsigned long size; | |
int ret; | |
if (get_sha1(name, sha1)) | |
return error("tag '%s' not found.", name); | |
type = sha1_object_info(sha1, NULL); | |
if (type != OBJ_TAG) | |
return error("%s: cannot verify a non-tag object of type %s.", | |
name, typename(type)); | |
buf = read_sha1_file(sha1, &type, &size); | |
if (!buf) | |
return error("%s: unable to read file.", name); | |
ret = run_gpg_verify(buf, size, verbose); | |
free(buf); | |
return ret; | |
} | |
static int git_verify_tag_config(const char *var, const char *value, void *cb) | |
{ | |
int status = git_gpg_config(var, value, cb); | |
if (status) | |
return status; | |
return git_default_config(var, value, cb); | |
} | |
int cmd_verify_tag(int argc, const char **argv, const char *prefix) | |
{ | |
int i = 1, verbose = 0, had_error = 0; | |
const struct option verify_tag_options[] = { | |
OPT__VERBOSE(&verbose, N_("print tag contents")), | |
OPT_END() | |
}; | |
git_config(git_verify_tag_config, NULL); | |
argc = parse_options(argc, argv, prefix, verify_tag_options, | |
verify_tag_usage, PARSE_OPT_KEEP_ARGV0); | |
if (argc <= i) | |
usage_with_options(verify_tag_usage, verify_tag_options); | |
/* sometimes the program was terminated because this signal | |
* was received in the process of writing the gpg input: */ | |
signal(SIGPIPE, SIG_IGN); | |
while (i < argc) | |
if (verify_tag(argv[i++], verbose)) | |
had_error = 1; | |
return had_error; | |
} |