Andrew's git - gitweb.git/blob

8750bef016314c91b93e608b86121c63079a3398
   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>
  13#include "parse-options.h"
  14#include "gpg-interface.h"
  15
  16static const char * const verify_tag_usage[] = {
  17                N_("git verify-tag [-v | --verbose] <tag>..."),
  18                NULL
  19};
  20
  21static int run_gpg_verify(const char *buf, unsigned long size, int verbose)
  22{
  23        struct signature_check sigc;
  24        int len;
  25        int ret;
  26
  27        memset(&sigc, 0, sizeof(sigc));
  28
  29        len = parse_signature(buf, size);
  30        if (verbose)
  31                write_in_full(1, buf, len);
  32
  33        if (size == len)
  34                return error("no signature found");
  35
  36        ret = check_signature(buf, len, buf + len, size - len, &sigc);
  37        fputs(sigc.gpg_output, stderr);
  38
  39        signature_check_clear(&sigc);
  40        return ret;
  41}
  42
  43static int verify_tag(const char *name, int verbose)
  44{
  45        enum object_type type;
  46        unsigned char sha1[20];
  47        char *buf;
  48        unsigned long size;
  49        int ret;
  50
  51        if (get_sha1(name, sha1))
  52                return error("tag '%s' not found.", name);
  53
  54        type = sha1_object_info(sha1, NULL);
  55        if (type != OBJ_TAG)
  56                return error("%s: cannot verify a non-tag object of type %s.",
  57                                name, typename(type));
  58
  59        buf = read_sha1_file(sha1, &type, &size);
  60        if (!buf)
  61                return error("%s: unable to read file.", name);
  62
  63        ret = run_gpg_verify(buf, size, verbose);
  64
  65        free(buf);
  66        return ret;
  67}
  68
  69static int git_verify_tag_config(const char *var, const char *value, void *cb)
  70{
  71        int status = git_gpg_config(var, value, cb);
  72        if (status)
  73                return status;
  74        return git_default_config(var, value, cb);
  75}
  76
  77int cmd_verify_tag(int argc, const char **argv, const char *prefix)
  78{
  79        int i = 1, verbose = 0, had_error = 0;
  80        const struct option verify_tag_options[] = {
  81                OPT__VERBOSE(&verbose, N_("print tag contents")),
  82                OPT_END()
  83        };
  84
  85        git_config(git_verify_tag_config, NULL);
  86
  87        argc = parse_options(argc, argv, prefix, verify_tag_options,
  88                             verify_tag_usage, PARSE_OPT_KEEP_ARGV0);
  89        if (argc <= i)
  90                usage_with_options(verify_tag_usage, verify_tag_options);
  91
  92        /* sometimes the program was terminated because this signal
  93         * was received in the process of writing the gpg input: */
  94        signal(SIGPIPE, SIG_IGN);
  95        while (i < argc)
  96                if (verify_tag(argv[i++], verbose))
  97                        had_error = 1;
  98        return had_error;
  99}