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Commit | Line | Data |
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2ae68fcb CR |
1 | /* |
2 | * Builtin "git verify-tag" | |
3 | * | |
4 | * Copyright (c) 2007 Carlos Rica <jasampler@gmail.com> | |
5 | * | |
6 | * Based on git-verify-tag.sh | |
7 | */ | |
8 | #include "cache.h" | |
9 | #include "builtin.h" | |
10 | #include "tag.h" | |
11 | #include "run-command.h" | |
12 | #include <signal.h> | |
4855b2a2 | 13 | #include "parse-options.h" |
2ae68fcb | 14 | |
4855b2a2 SB |
15 | static const char * const verify_tag_usage[] = { |
16 | "git verify-tag [-v|--verbose] <tag>...", | |
17 | NULL | |
18 | }; | |
2ae68fcb CR |
19 | |
20 | #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" | |
21 | ||
22 | static int run_gpg_verify(const char *buf, unsigned long size, int verbose) | |
23 | { | |
24 | struct child_process gpg; | |
25 | const char *args_gpg[] = {"gpg", "--verify", "FILE", "-", NULL}; | |
26 | char path[PATH_MAX], *eol; | |
27 | size_t len; | |
28 | int fd, ret; | |
29 | ||
30 | fd = git_mkstemp(path, PATH_MAX, ".git_vtag_tmpXXXXXX"); | |
31 | if (fd < 0) | |
32 | return error("could not create temporary file '%s': %s", | |
33 | path, strerror(errno)); | |
34 | if (write_in_full(fd, buf, size) < 0) | |
35 | return error("failed writing temporary file '%s': %s", | |
36 | path, strerror(errno)); | |
37 | close(fd); | |
38 | ||
39 | /* find the length without signature */ | |
40 | len = 0; | |
fec60a26 | 41 | while (len < size && prefixcmp(buf + len, PGP_SIGNATURE)) { |
2ae68fcb CR |
42 | eol = memchr(buf + len, '\n', size - len); |
43 | len += eol ? eol - (buf + len) + 1 : size - len; | |
44 | } | |
45 | if (verbose) | |
46 | write_in_full(1, buf, len); | |
47 | ||
48 | memset(&gpg, 0, sizeof(gpg)); | |
49 | gpg.argv = args_gpg; | |
50 | gpg.in = -1; | |
2ae68fcb | 51 | args_gpg[2] = path; |
69fe5ef6 JS |
52 | if (start_command(&gpg)) { |
53 | unlink(path); | |
2ae68fcb | 54 | return error("could not run gpg."); |
69fe5ef6 | 55 | } |
2ae68fcb CR |
56 | |
57 | write_in_full(gpg.in, buf, len); | |
58 | close(gpg.in); | |
2ae68fcb CR |
59 | ret = finish_command(&gpg); |
60 | ||
691f1a28 | 61 | unlink_or_warn(path); |
2ae68fcb CR |
62 | |
63 | return ret; | |
64 | } | |
65 | ||
66 | static int verify_tag(const char *name, int verbose) | |
67 | { | |
68 | enum object_type type; | |
69 | unsigned char sha1[20]; | |
70 | char *buf; | |
71 | unsigned long size; | |
72 | int ret; | |
73 | ||
74 | if (get_sha1(name, sha1)) | |
75 | return error("tag '%s' not found.", name); | |
76 | ||
77 | type = sha1_object_info(sha1, NULL); | |
78 | if (type != OBJ_TAG) | |
79 | return error("%s: cannot verify a non-tag object of type %s.", | |
80 | name, typename(type)); | |
81 | ||
82 | buf = read_sha1_file(sha1, &type, &size); | |
83 | if (!buf) | |
84 | return error("%s: unable to read file.", name); | |
85 | ||
86 | ret = run_gpg_verify(buf, size, verbose); | |
87 | ||
88 | free(buf); | |
89 | return ret; | |
90 | } | |
91 | ||
92 | int cmd_verify_tag(int argc, const char **argv, const char *prefix) | |
93 | { | |
94 | int i = 1, verbose = 0, had_error = 0; | |
4855b2a2 SB |
95 | const struct option verify_tag_options[] = { |
96 | OPT__VERBOSE(&verbose), | |
97 | OPT_END() | |
98 | }; | |
2ae68fcb | 99 | |
ef90d6d4 | 100 | git_config(git_default_config, NULL); |
2ae68fcb | 101 | |
4855b2a2 SB |
102 | argc = parse_options(argc, argv, prefix, verify_tag_options, |
103 | verify_tag_usage, PARSE_OPT_KEEP_ARGV0); | |
d2761895 | 104 | if (argc <= i) |
4855b2a2 | 105 | usage_with_options(verify_tag_usage, verify_tag_options); |
d2761895 | 106 | |
2ae68fcb CR |
107 | /* sometimes the program was terminated because this signal |
108 | * was received in the process of writing the gpg input: */ | |
109 | signal(SIGPIPE, SIG_IGN); | |
110 | while (i < argc) | |
111 | if (verify_tag(argv[i++], verbose)) | |
112 | had_error = 1; | |
113 | return had_error; | |
114 | } |