Andrew's git - gitweb.git/blob - builtin/verify-commit.c

   1/*
   2 * Builtin "git commit-commit"
   3 *
   4 * Copyright (c) 2014 Michael J Gruber <git@drmicha.warpmail.net>
   5 *
   6 * Based on git-verify-tag
   7 */
   8#include "cache.h"
   9#include "config.h"
  10#include "builtin.h"
  11#include "object-store.h"
  12#include "commit.h"
  13#include "run-command.h"
  14#include <signal.h>
  15#include "parse-options.h"
  16#include "gpg-interface.h"
  17
  18static const char * const verify_commit_usage[] = {
  19                N_("git verify-commit [-v | --verbose] <commit>..."),
  20                NULL
  21};
  22
  23static int run_gpg_verify(const struct object_id *oid, const char *buf, unsigned long size, unsigned flags)
  24{
  25        struct signature_check signature_check;
  26        int ret;
  27
  28        memset(&signature_check, 0, sizeof(signature_check));
  29
  30        ret = check_commit_signature(lookup_commit(oid), &signature_check);
  31        print_signature_buffer(&signature_check, flags);
  32
  33        signature_check_clear(&signature_check);
  34        return ret;
  35}
  36
  37static int verify_commit(const char *name, unsigned flags)
  38{
  39        enum object_type type;
  40        struct object_id oid;
  41        char *buf;
  42        unsigned long size;
  43        int ret;
  44
  45        if (get_oid(name, &oid))
  46                return error("commit '%s' not found.", name);
  47
  48        buf = read_object_file(&oid, &type, &size);
  49        if (!buf)
  50                return error("%s: unable to read file.", name);
  51        if (type != OBJ_COMMIT)
  52                return error("%s: cannot verify a non-commit object of type %s.",
  53                                name, type_name(type));
  54
  55        ret = run_gpg_verify(&oid, buf, size, flags);
  56
  57        free(buf);
  58        return ret;
  59}
  60
  61static int git_verify_commit_config(const char *var, const char *value, void *cb)
  62{
  63        int status = git_gpg_config(var, value, cb);
  64        if (status)
  65                return status;
  66        return git_default_config(var, value, cb);
  67}
  68
  69int cmd_verify_commit(int argc, const char **argv, const char *prefix)
  70{
  71        int i = 1, verbose = 0, had_error = 0;
  72        unsigned flags = 0;
  73        const struct option verify_commit_options[] = {
  74                OPT__VERBOSE(&verbose, N_("print commit contents")),
  75                OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
  76                OPT_END()
  77        };
  78
  79        git_config(git_verify_commit_config, NULL);
  80
  81        argc = parse_options(argc, argv, prefix, verify_commit_options,
  82                             verify_commit_usage, PARSE_OPT_KEEP_ARGV0);
  83        if (argc <= i)
  84                usage_with_options(verify_commit_usage, verify_commit_options);
  85
  86        if (verbose)
  87                flags |= GPG_VERIFY_VERBOSE;
  88
  89        /* sometimes the program was terminated because this signal
  90         * was received in the process of writing the gpg input: */
  91        signal(SIGPIPE, SIG_IGN);
  92        while (i < argc)
  93                if (verify_commit(argv[i++], flags))
  94                        had_error = 1;
  95        return had_error;
  96}