/* * 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> static const char builtin_verify_tag_usage[] = "git verify-tag [-v|--verbose] <tag>..."; #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" static int run_gpg_verify(const char *buf, unsigned long size, int verbose) { struct child_process gpg; const char *args_gpg[] = {"gpg", "--verify", "FILE", "-", NULL}; char path[PATH_MAX], *eol; size_t len; int fd, ret; fd = git_mkstemp(path, PATH_MAX, ".git_vtag_tmpXXXXXX"); if (fd < 0) return error("could not create temporary file '%s': %s", path, strerror(errno)); if (write_in_full(fd, buf, size) < 0) return error("failed writing temporary file '%s': %s", path, strerror(errno)); close(fd); /* find the length without signature */ len = 0; while (len < size && prefixcmp(buf + len, PGP_SIGNATURE)) { eol = memchr(buf + len, '\n', size - len); len += eol ? eol - (buf + len) + 1 : size - len; } if (verbose) write_in_full(1, buf, len); memset(&gpg, 0, sizeof(gpg)); gpg.argv = args_gpg; gpg.in = -1; args_gpg[2] = path; if (start_command(&gpg)) { unlink(path); return error("could not run gpg."); } write_in_full(gpg.in, buf, len); close(gpg.in); ret = finish_command(&gpg); unlink(path); 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; } int cmd_verify_tag(int argc, const char **argv, const char *prefix) { int i = 1, verbose = 0, had_error = 0; git_config(git_default_config, NULL); if (argc > 1 && (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--verbose"))) { verbose = 1; i++; } if (argc <= i) usage(builtin_verify_tag_usage); /* 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; }