115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
/*
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* Builtin "git verify-tag"
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*
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* Copyright (c) 2007 Carlos Rica <jasampler@gmail.com>
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*
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* Based on git-verify-tag.sh
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "tag.h"
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#include "run-command.h"
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#include <signal.h>
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#include "parse-options.h"
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static const char * const verify_tag_usage[] = {
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"git verify-tag [-v|--verbose] <tag>...",
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NULL
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};
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#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
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static int run_gpg_verify(const char *buf, unsigned long size, int verbose)
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{
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struct child_process gpg;
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const char *args_gpg[] = {"gpg", "--verify", "FILE", "-", NULL};
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char path[PATH_MAX], *eol;
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size_t len;
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int fd, ret;
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fd = git_mkstemp(path, PATH_MAX, ".git_vtag_tmpXXXXXX");
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if (fd < 0)
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return error("could not create temporary file '%s': %s",
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path, strerror(errno));
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if (write_in_full(fd, buf, size) < 0)
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return error("failed writing temporary file '%s': %s",
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path, strerror(errno));
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close(fd);
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/* find the length without signature */
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len = 0;
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while (len < size && prefixcmp(buf + len, PGP_SIGNATURE)) {
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eol = memchr(buf + len, '\n', size - len);
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len += eol ? eol - (buf + len) + 1 : size - len;
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}
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if (verbose)
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write_in_full(1, buf, len);
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memset(&gpg, 0, sizeof(gpg));
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gpg.argv = args_gpg;
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gpg.in = -1;
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args_gpg[2] = path;
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if (start_command(&gpg)) {
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unlink(path);
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return error("could not run gpg.");
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}
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write_in_full(gpg.in, buf, len);
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close(gpg.in);
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ret = finish_command(&gpg);
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unlink_or_warn(path);
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return ret;
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}
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static int verify_tag(const char *name, int verbose)
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{
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enum object_type type;
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unsigned char sha1[20];
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char *buf;
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unsigned long size;
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int ret;
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if (get_sha1(name, sha1))
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return error("tag '%s' not found.", name);
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type = sha1_object_info(sha1, NULL);
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if (type != OBJ_TAG)
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return error("%s: cannot verify a non-tag object of type %s.",
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name, typename(type));
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf)
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return error("%s: unable to read file.", name);
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ret = run_gpg_verify(buf, size, verbose);
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free(buf);
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return ret;
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}
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int cmd_verify_tag(int argc, const char **argv, const char *prefix)
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{
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int i = 1, verbose = 0, had_error = 0;
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const struct option verify_tag_options[] = {
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OPT__VERBOSE(&verbose),
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OPT_END()
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};
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git_config(git_default_config, NULL);
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argc = parse_options(argc, argv, prefix, verify_tag_options,
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verify_tag_usage, PARSE_OPT_KEEP_ARGV0);
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if (argc <= i)
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usage_with_options(verify_tag_usage, verify_tag_options);
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/* sometimes the program was terminated because this signal
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* was received in the process of writing the gpg input: */
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signal(SIGPIPE, SIG_IGN);
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while (i < argc)
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if (verify_tag(argv[i++], verbose))
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had_error = 1;
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return had_error;
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}
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