/* run-verify.c - Helper to perform a verify operation
Copyright (C) 2009 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
/* We need to include config.h so that we know whether we are building
with large file system (LFS) support. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <gpgme.h>
#define PGM "run-verify"
#include "run-support.h"
static int verbose;
static const char *
isotimestr (unsigned long value)
{
time_t t;
static char buffer[25+5];
struct tm *tp;
if (!value)
return "none";
t = value;
tp = gmtime (&t);
snprintf (buffer, sizeof buffer, "%04d-%02d-%02d %02d:%02d:%02d",
1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday,
tp->tm_hour, tp->tm_min, tp->tm_sec);
return buffer;
}
static gpg_error_t
status_cb (void *opaque, const char *keyword, const char *value)
{
(void)opaque;
fprintf (stderr, "status_cb: %s %s\n", keyword, value);
return 0;
}
static void
print_summary (gpgme_sigsum_t summary)
{
if ( (summary & GPGME_SIGSUM_VALID ))
fputs (" valid", stdout);
if ( (summary & GPGME_SIGSUM_GREEN ))
fputs (" green", stdout);
if ( (summary & GPGME_SIGSUM_RED ))
fputs (" red", stdout);
if ( (summary & GPGME_SIGSUM_KEY_REVOKED))
fputs (" revoked", stdout);
if ( (summary & GPGME_SIGSUM_KEY_EXPIRED))
fputs (" key-expired", stdout);
if ( (summary & GPGME_SIGSUM_SIG_EXPIRED))
fputs (" sig-expired", stdout);
if ( (summary & GPGME_SIGSUM_KEY_MISSING))
fputs (" key-missing", stdout);
if ( (summary & GPGME_SIGSUM_CRL_MISSING))
fputs (" crl-missing", stdout);
if ( (summary & GPGME_SIGSUM_CRL_TOO_OLD))
fputs (" crl-too-old", stdout);
if ( (summary & GPGME_SIGSUM_BAD_POLICY ))
fputs (" bad-policy", stdout);
if ( (summary & GPGME_SIGSUM_SYS_ERROR ))
fputs (" sys-error", stdout);
}
static void
print_validity (gpgme_validity_t val)
{
const char *s = NULL;
switch (val)
{
case GPGME_VALIDITY_UNKNOWN: s = "unknown"; break;
case GPGME_VALIDITY_UNDEFINED:s = "undefined"; break;
case GPGME_VALIDITY_NEVER: s = "never"; break;
case GPGME_VALIDITY_MARGINAL: s = "marginal"; break;
case GPGME_VALIDITY_FULL: s = "full"; break;
case GPGME_VALIDITY_ULTIMATE: s = "ultimate"; break;
}
if (s)
fputs (s, stdout);
else
printf ("[bad validity value %u]", (unsigned int)val);
}
static void
print_description (const char *text, int indent)
{
for (; *text; text++)
{
putchar (*text);
if (*text == '\n')
printf ("%*s", indent, "");
}
putchar ('\n');
}
static void
print_result (gpgme_verify_result_t result)
{
gpgme_signature_t sig;
gpgme_sig_notation_t nt;
gpgme_user_id_t uid;
gpgme_tofu_info_t ti;
int count = 0;
printf ("Original file name: %s\n", nonnull(result->file_name));
for (sig = result->signatures; sig; sig = sig->next)
{
printf ("Signature %d\n", count++);
printf (" status ....: %s\n", gpgme_strerror (sig->status));
printf (" summary ...:"); print_summary (sig->summary); putchar ('\n');
printf (" fingerprint: %s\n", nonnull (sig->fpr));
printf (" created ...: %lu\n", sig->timestamp);
printf (" expires ...: %lu\n", sig->exp_timestamp);
printf (" validity ..: ");
print_validity (sig->validity); putchar ('\n');
printf (" val.reason : %s\n", gpgme_strerror (sig->status));
printf (" pubkey algo: %d (%s)\n", sig->pubkey_algo,
nonnull(gpgme_pubkey_algo_name (sig->pubkey_algo)));
printf (" digest algo: %d (%s)\n", sig->hash_algo,
nonnull(gpgme_hash_algo_name (sig->hash_algo)));
printf (" pka address: %s\n", nonnull (sig->pka_address));
printf (" pka trust .: %s\n",
sig->pka_trust == 0? "n/a" :
sig->pka_trust == 1? "bad" :
sig->pka_trust == 2? "okay": "RFU");
printf (" other flags:%s%s\n",
sig->wrong_key_usage? " wrong-key-usage":"",
sig->chain_model? " chain-model":""
);
for (nt = sig->notations; nt; nt = nt->next)
{
printf (" notation ..: '%s'\n", nt->name);
if (strlen (nt->name) != nt->name_len)
printf (" warning : name larger (%d)\n", nt->name_len);
printf (" flags ...:%s%s (0x%02x)\n",
nt->critical? " critical":"",
nt->human_readable? " human":"",
nt->flags);
if (nt->value)
printf (" value ...: '%s'\n", nt->value);
if ((nt->value?strlen (nt->value):0) != nt->value_len)
printf (" warning : value larger (%d)\n", nt->value_len);
}
if (sig->key)
{
printf (" primary fpr: %s\n", nonnull (sig->key->fpr));
for (uid = sig->key->uids; uid; uid = uid->next)
{
printf (" tofu addr .: %s\n", nonnull (uid->address));
ti = uid->tofu;
if (!ti)
continue;
printf (" validity : %u (%s)\n", ti->validity,
ti->validity == 0? "conflict" :
ti->validity == 1? "no history" :
ti->validity == 2? "little history" :
ti->validity == 3? "enough history" :
ti->validity == 4? "lot of history" : "?");
printf (" policy ..: %u (%s)\n", ti->policy,
ti->policy == GPGME_TOFU_POLICY_NONE? "none" :
ti->policy == GPGME_TOFU_POLICY_AUTO? "auto" :
ti->policy == GPGME_TOFU_POLICY_GOOD? "good" :
ti->policy == GPGME_TOFU_POLICY_UNKNOWN? "unknown" :
ti->policy == GPGME_TOFU_POLICY_BAD? "bad" :
ti->policy == GPGME_TOFU_POLICY_ASK? "ask" : "?");
printf (" signcount: %hu\n", ti->signcount);
printf (" first..: %s\n", isotimestr (ti->signfirst));
printf (" last ..: %s\n", isotimestr (ti->signlast));
printf (" encrcount: %hu\n", ti->encrcount);
printf (" first..: %s\n", isotimestr (ti->encrfirst));
printf (" last ..: %s\n", isotimestr (ti->encrlast));
printf (" desc ....: ");
print_description (nonnull (ti->description), 15);
}
}
}
}
static int
show_usage (int ex)
{
fputs ("usage: " PGM " [options] [DETACHEDSIGFILE] FILE\n\n"
"Options:\n"
" --verbose run in verbose mode\n"
" --status print status lines from the backend\n"
" --openpgp use the OpenPGP protocol (default)\n"
" --cms use the CMS protocol\n"
" --sender MBOX use MBOX as sender address\n"
" --auto-key-retrieve\n"
, stderr);
exit (ex);
}
int
main (int argc, char **argv)
{
int last_argc = -1;
const char *s;
gpgme_error_t err;
gpgme_ctx_t ctx;
gpgme_protocol_t protocol = GPGME_PROTOCOL_OpenPGP;
FILE *fp_sig = NULL;
gpgme_data_t sig = NULL;
FILE *fp_msg = NULL;
gpgme_data_t msg = NULL;
gpgme_verify_result_t result;
int print_status = 0;
const char *sender = NULL;
int auto_key_retrieve = 0;
if (argc)
{ argc--; argv++; }
while (argc && last_argc != argc )
{
last_argc = argc;
if (!strcmp (*argv, "--"))
{
argc--; argv++;
break;
}
else if (!strcmp (*argv, "--help"))
show_usage (0);
else if (!strcmp (*argv, "--verbose"))
{
verbose = 1;
argc--; argv++;
}
else if (!strcmp (*argv, "--status"))
{
print_status = 1;
argc--; argv++;
}
else if (!strcmp (*argv, "--openpgp"))
{
protocol = GPGME_PROTOCOL_OpenPGP;
argc--; argv++;
}
else if (!strcmp (*argv, "--cms"))
{
protocol = GPGME_PROTOCOL_CMS;
argc--; argv++;
}
else if (!strcmp (*argv, "--sender"))
{
argc--; argv++;
if (!argc)
show_usage (1);
sender = *argv;
argc--; argv++;
}
else if (!strcmp (*argv, "--auto-key-retrieve"))
{
auto_key_retrieve = 1;
argc--; argv++;
}
else if (!strncmp (*argv, "--", 2))
show_usage (1);
}
if (argc < 1 || argc > 2)
show_usage (1);
fp_sig = fopen (argv[0], "rb");
if (!fp_sig)
{
err = gpgme_error_from_syserror ();
fprintf (stderr, PGM ": can't open `%s': %s\n",
argv[0], gpgme_strerror (err));
exit (1);
}
if (argc > 1)
{
fp_msg = fopen (argv[1], "rb");
if (!fp_msg)
{
err = gpgme_error_from_syserror ();
fprintf (stderr, PGM ": can't open `%s': %s\n",
argv[1], gpgme_strerror (err));
exit (1);
}
}
init_gpgme (protocol);
err = gpgme_new (&ctx);
fail_if_err (err);
gpgme_set_protocol (ctx, protocol);
if (print_status)
{
gpgme_set_status_cb (ctx, status_cb, NULL);
gpgme_set_ctx_flag (ctx, "full-status", "1");
}
/* gpgme_set_ctx_flag (ctx, "raw-description", "1"); */
if (auto_key_retrieve)
{
gpgme_set_ctx_flag (ctx, "auto-key-retrieve", "1");
s = gpgme_get_ctx_flag (ctx, "auto-key-retrieve");
if (!s || strcmp (s, "1"))
{
fprintf (stderr, PGM ": gpgme_get_ctx_flag failed for '%s'\n",
"auto-key-retrieve");
exit (1);
}
}
if (sender)
{
err = gpgme_set_sender (ctx, sender);
fail_if_err (err);
}
err = gpgme_data_new_from_stream (&sig, fp_sig);
if (err)
{
fprintf (stderr, PGM ": error allocating data object: %s\n",
gpgme_strerror (err));
exit (1);
}
if (fp_msg)
{
err = gpgme_data_new_from_stream (&msg, fp_msg);
if (err)
{
fprintf (stderr, PGM ": error allocating data object: %s\n",
gpgme_strerror (err));
exit (1);
}
}
err = gpgme_op_verify (ctx, sig, msg, NULL);
result = gpgme_op_verify_result (ctx);
if (result)
print_result (result);
if (err)
{
fprintf (stderr, PGM ": verify failed: %s\n", gpgme_strerror (err));
exit (1);
}
gpgme_data_release (msg);
gpgme_data_release (sig);
gpgme_release (ctx);
return 0;
}