Andrew's git - gitweb.git/blob

fa26e407c82260abd41c611381305728afb0c28e
   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, unsigned flags)
  22{
  23        struct signature_check sigc;
  24        size_t payload_size;
  25        int ret;
  26
  27        memset(&sigc, 0, sizeof(sigc));
  28
  29        payload_size = parse_signature(buf, size);
  30
  31        if (size == payload_size) {
  32                if (flags & GPG_VERIFY_VERBOSE)
  33                        write_in_full(1, buf, payload_size);
  34                return error("no signature found");
  35        }
  36
  37        ret = check_signature(buf, payload_size, buf + payload_size,
  38                                size - payload_size, &sigc);
  39        print_signature_buffer(&sigc, flags);
  40
  41        signature_check_clear(&sigc);
  42        return ret;
  43}
  44
  45static int verify_tag(const char *name, unsigned flags)
  46{
  47        enum object_type type;
  48        unsigned char sha1[20];
  49        char *buf;
  50        unsigned long size;
  51        int ret;
  52
  53        if (get_sha1(name, sha1))
  54                return error("tag '%s' not found.", name);
  55
  56        type = sha1_object_info(sha1, NULL);
  57        if (type != OBJ_TAG)
  58                return error("%s: cannot verify a non-tag object of type %s.",
  59                                name, typename(type));
  60
  61        buf = read_sha1_file(sha1, &type, &size);
  62        if (!buf)
  63                return error("%s: unable to read file.", name);
  64
  65        ret = run_gpg_verify(buf, size, flags);
  66
  67        free(buf);
  68        return ret;
  69}
  70
  71static int git_verify_tag_config(const char *var, const char *value, void *cb)
  72{
  73        int status = git_gpg_config(var, value, cb);
  74        if (status)
  75                return status;
  76        return git_default_config(var, value, cb);
  77}
  78
  79int cmd_verify_tag(int argc, const char **argv, const char *prefix)
  80{
  81        int i = 1, verbose = 0, had_error = 0;
  82        unsigned flags = 0;
  83        const struct option verify_tag_options[] = {
  84                OPT__VERBOSE(&verbose, N_("print tag contents")),
  85                OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  86                OPT_END()
  87        };
  88
  89        git_config(git_verify_tag_config, NULL);
  90
  91        argc = parse_options(argc, argv, prefix, verify_tag_options,
  92                             verify_tag_usage, PARSE_OPT_KEEP_ARGV0);
  93        if (argc <= i)
  94                usage_with_options(verify_tag_usage, verify_tag_options);
  95
  96        if (verbose)
  97                flags |= GPG_VERIFY_VERBOSE;
  98
  99        while (i < argc)
 100                if (verify_tag(argv[i++], flags))
 101                        had_error = 1;
 102        return had_error;
 103}