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gnupg/g10/gpgv.c

386 lines
9.2 KiB
C

/* gpgv.c - The GnuPG signature verify utility
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005,
* 2006 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#ifdef HAVE_DOSISH_SYSTEM
#include <fcntl.h> /* for setmode() */
#endif
#ifdef HAVE_LIBREADLINE
#define GNUPG_LIBREADLINE_H_INCLUDED
#include <readline/readline.h>
#endif
#define INCLUDED_BY_MAIN_MODULE 1
#include "gpg.h"
#include "packet.h"
#include "iobuf.h"
#include "util.h"
#include "main.h"
#include "options.h"
#include "keydb.h"
#include "trustdb.h"
#include "cipher.h"
#include "filter.h"
#include "ttyio.h"
#include "i18n.h"
#include "sysutils.h"
#include "status.h"
#include "call-agent.h"
enum cmd_and_opt_values { aNull = 0,
oQuiet = 'q',
oVerbose = 'v',
oBatch = 500,
oKeyring,
oIgnoreTimeConflict,
oStatusFD,
oLoggerFD,
oHomedir,
aTest };
static ARGPARSE_OPTS opts[] = {
{ 301, NULL, 0, N_("@\nOptions:\n ") },
{ oVerbose, "verbose", 0, N_("verbose") },
{ oQuiet, "quiet", 0, N_("be somewhat more quiet") },
{ oKeyring, "keyring" ,2, N_("take the keys from this keyring")},
{ oIgnoreTimeConflict, "ignore-time-conflict", 0,
N_("make timestamp conflicts only a warning") },
{ oStatusFD, "status-fd" ,1, N_("|FD|write status info to this FD") },
{ oLoggerFD, "logger-fd",1, "@" },
{ oHomedir, "homedir", 2, "@" }, /* defaults to "~/.gnupg" */
{0} };
int g10_errors_seen = 0;
static const char *
my_strusage( int level )
{
const char *p;
switch( level ) {
case 11: p = "gpgv (GnuPG)";
break;
case 13: p = VERSION; break;
case 17: p = PRINTABLE_OS_NAME; break;
case 19: p =
_("Please report bugs to <gnupg-bugs@gnu.org>.\n");
break;
case 1:
case 40: p =
_("Usage: gpgv [options] [files] (-h for help)");
break;
case 41: p =
_("Syntax: gpg [options] [files]\n"
"Check signatures against known trusted keys\n");
break;
default: p = NULL;
}
return p;
}
int
main( int argc, char **argv )
{
ARGPARSE_ARGS pargs;
int rc=0;
strlist_t sl;
strlist_t nrings=NULL;
unsigned configlineno;
set_strusage (my_strusage);
log_set_prefix ("gpgv", 1);
/* Make sure that our subsystems are ready. */
init_common_subsystems ();
gnupg_init_signals (0, NULL);
i18n_init();
opt.command_fd = -1; /* no command fd */
opt.pgp2_workarounds = 1;
opt.keyserver_options.options|=KEYSERVER_AUTO_KEY_RETRIEVE;
opt.trust_model = TM_ALWAYS;
opt.batch = 1;
opt.homedir = default_homedir ();
tty_no_terminal(1);
tty_batchmode(1);
disable_dotlock();
pargs.argc = &argc;
pargs.argv = &argv;
pargs.flags= 1; /* do not remove the args */
while( optfile_parse( NULL, NULL, &configlineno, &pargs, opts) ) {
switch( pargs.r_opt ) {
case oQuiet: opt.quiet = 1; break;
case oVerbose:
opt.verbose++;
opt.list_sigs=1;
gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
break;
case oKeyring: append_to_strlist( &nrings, pargs.r.ret_str); break;
case oStatusFD: set_status_fd( pargs.r.ret_int ); break;
case oLoggerFD:
log_set_fd (translate_sys2libc_fd_int (pargs.r.ret_int, 1));
break;
case oHomedir: opt.homedir = pargs.r.ret_str; break;
case oIgnoreTimeConflict: opt.ignore_time_conflict = 1; break;
default : pargs.err = 2; break;
}
}
if( log_get_errorcount(0) )
g10_exit(2);
if( opt.verbose > 1 )
set_packet_list_mode(1);
if( !nrings ) /* no keyring given: use default one */
keydb_add_resource ("trustedkeys" EXTSEP_S "gpg", 0, 0);
for(sl = nrings; sl; sl = sl->next )
keydb_add_resource (sl->d, 0, 0 );
FREE_STRLIST (nrings);
if( (rc = verify_signatures( argc, argv ) ))
log_error("verify signatures failed: %s\n", g10_errstr(rc) );
/* cleanup */
g10_exit(0);
return 8; /*NEVER REACHED*/
}
void
g10_exit( int rc )
{
rc = rc? rc : log_get_errorcount(0)? 2 :
g10_errors_seen? 1 : 0;
exit(rc );
}
/* Stub:
* We have to override the trustcheck from pkclist.c becuase
* this utility assumes that all keys in the keyring are trustworthy
*/
int
check_signatures_trust( PKT_signature *sig )
{
return 0;
}
void
read_trust_options(byte *trust_model,ulong *created,ulong *nextcheck,
byte *marginals,byte *completes,byte *cert_depth) {}
/* Stub:
* We don't have the trustdb , so we have to provide some stub functions
* instead
*/
int
cache_disabled_value(PKT_public_key *pk)
{
return 0;
}
void
check_trustdb_stale(void) {}
int
get_validity_info (PKT_public_key *pk, PKT_user_id *uid)
{
return '?';
}
unsigned int
get_validity (PKT_public_key *pk, PKT_user_id *uid)
{
return 0;
}
const char *
trust_value_to_string (unsigned int value)
{
return "err";
}
const char *
uid_trust_string_fixed(PKT_public_key *key,PKT_user_id *uid)
{
return "err";
}
int
get_ownertrust_info (PKT_public_key *pk)
{
return '?';
}
unsigned int
get_ownertrust (PKT_public_key *pk)
{
return TRUST_UNKNOWN;
}
/* Stubs:
* Because we only work with trusted keys, it does not make sense to
* get them from a keyserver
*/
struct keyserver_spec *
keyserver_match(struct keyserver_spec *spec) { return NULL; }
int
keyserver_import_keyid( u32 *keyid, void *dummy )
{
return -1;
}
int
keyserver_import_cert(const char *name) { return -1; }
int
keyserver_import_pka(const char *name,unsigned char *fpr) { return -1; }
int
keyserver_import_name(const char *name,struct keyserver_spec *spec)
{
return -1;
}
int
keyserver_import_ldap(const char *name) { return -1; }
/* Stub:
* No encryption here but mainproc links to these functions.
*/
int
get_session_key( PKT_pubkey_enc *k, DEK *dek )
{
return G10ERR_GENERAL;
}
/* Stub: */
int
get_override_session_key( DEK *dek, const char *string )
{
return G10ERR_GENERAL;
}
/* Stub: */
int
decrypt_data( void *procctx, PKT_encrypted *ed, DEK *dek )
{
return G10ERR_GENERAL;
}
/* Stub:
* No interactive commnds, so we don't need the helptexts
*/
void
display_online_help( const char *keyword )
{
}
/* Stub:
* We don't use secret keys, but getkey.c links to this
*/
int
check_secret_key( PKT_secret_key *sk, int n )
{
return G10ERR_GENERAL;
}
/* Stub:
* No secret key, so no passphrase needed
*/
DEK *
passphrase_to_dek( u32 *keyid, int pubkey_algo,
int cipher_algo, STRING2KEY *s2k, int mode,
const char *tmp, int *canceled)
{
if (canceled)
*canceled = 0;
return NULL;
}
struct keyserver_spec *parse_preferred_keyserver(PKT_signature *sig) {return NULL;}
struct keyserver_spec *parse_keyserver_uri(const char *uri,int require_scheme,
const char *configname,
unsigned int configlineno)
{
return NULL;
}
void free_keyserver_spec(struct keyserver_spec *keyserver) {}
/* Stubs to avoid linking to photoid.c */
void show_photos(const struct user_attribute *attrs,int count,PKT_public_key *pk) {}
int parse_image_header(const struct user_attribute *attr,byte *type,u32 *len) {return 0;}
char *image_type_to_string(byte type,int string) {return NULL;}
#ifdef ENABLE_CARD_SUPPORT
int agent_scd_getattr (const char *name, struct agent_card_info_s *info) {return 0;}
#endif /* ENABLE_CARD_SUPPORT */
/* Stubs to void linking to ../cipher/cipher.c */
const char *cipher_algo_to_string( int algo ) { return "?";}
void disable_cipher_algo( int algo ) {}
int check_cipher_algo( int algo ) { return -1;}
unsigned int cipher_get_keylen( int algo ) { return 0; }
unsigned int cipher_get_blocksize( int algo ) {return 0;}
gcry_cipher_hd_t cipher_open( int algo, int mode, int secure ) { return NULL;}
void cipher_close( gcry_cipher_hd_t c ) {}
int cipher_setkey( gcry_cipher_hd_t c, byte *key, unsigned keylen ) { return -1;}
void cipher_setiv( gcry_cipher_hd_t c, const byte *iv, unsigned ivlen ){}
void cipher_encrypt( gcry_cipher_hd_t c, byte *outbuf,
byte *inbuf, unsigned nbytes ) {}
void cipher_decrypt( gcry_cipher_hd_t c, byte *outbuf,
byte *inbuf, unsigned nbytes ) {}
void cipher_sync( gcry_cipher_hd_t c ) {}
/* We do not do any locking, so use these stubs here */
void disable_dotlock(void) {}
DOTLOCK create_dotlock( const char *file_to_lock ) { return NULL; }
void destroy_dotlock (DOTLOCK h) {}
int make_dotlock( DOTLOCK h, long timeout ) { return 0;}
int release_dotlock( DOTLOCK h ) {return 0;}
void remove_lockfiles(void) {}