g10/gpgv.c

   1 /* gpgv.c - The GnuPG signature verify utility
   2  * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005,
   3  *               2006, 2008 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GnuPG.
   6  *
   7  * GnuPG is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * GnuPG is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <ctype.h>
  27 #include <unistd.h>
  28 #ifdef HAVE_DOSISH_SYSTEM
  29 #include <fcntl.h> /* for setmode() */
  30 #endif
  31 #ifdef HAVE_LIBREADLINE
  32 #define GNUPG_LIBREADLINE_H_INCLUDED
  33 #include <readline/readline.h>
  34 #endif
  35
  36 #define INCLUDED_BY_MAIN_MODULE 1
  37 #include "gpg.h"
  38 #include "packet.h"
  39 #include "iobuf.h"
  40 #include "util.h"
  41 #include "main.h"
  42 #include "options.h"
  43 #include "keydb.h"
  44 #include "trustdb.h"
  45 #include "cipher.h"
  46 #include "filter.h"
  47 #include "ttyio.h"
  48 #include "i18n.h"
  49 #include "sysutils.h"
  50 #include "status.h"
  51 #include "call-agent.h"
  52
  53
  54 enum cmd_and_opt_values {
  55   aNull = 0,
  56   oQuiet          = 'q',
  57   oVerbose        = 'v',
  58   oBatch          = 500,
  59   oKeyring,
  60   oIgnoreTimeConflict,
  61   oStatusFD,
  62   oLoggerFD,
  63   oHomedir,
  64   aTest
  65 };
  66
  67
  68 static ARGPARSE_OPTS opts[] = {
  69   ARGPARSE_group (300, N_("@\nOptions:\n ")),
  70
  71   ARGPARSE_s_n (oVerbose, "verbose", N_("verbose")),
  72   ARGPARSE_s_n (oQuiet,   "quiet",   N_("be somewhat more quiet")),
  73   ARGPARSE_s_s (oKeyring, "keyring",
  74                 N_("|FILE|take the keys from the keyring FILE")),
  75   ARGPARSE_s_n (oIgnoreTimeConflict, "ignore-time-conflict",
  76                 N_("make timestamp conflicts only a warning")),
  77   ARGPARSE_s_i (oStatusFD, "status-fd",
  78                 N_("|FD|write status info to this FD")),
  79   ARGPARSE_s_i (oLoggerFD, "logger-fd", "@"),
  80   ARGPARSE_s_s (oHomedir, "homedir", "@"),
  81
  82   ARGPARSE_end ()
  83 };
  84
  85
  86
  87 int g10_errors_seen = 0;
  88
  89
  90 static char *
  91 make_libversion (const char *libname, const char *(*getfnc)(const char*))
  92 {
  93   const char *s;
  94   char *result;
  95
  96   s = getfnc (NULL);
  97   result = xmalloc (strlen (libname) + 1 + strlen (s) + 1);
  98   strcpy (stpcpy (stpcpy (result, libname), " "), s);
  99   return result;
 100 }
 101
 102 static const char *
 103 my_strusage( int level )
 104 {
 105   static char *ver_gcry;
 106   const char *p;
 107
 108   switch (level)
 109     {
 110     case 11: p = "gpgv (GnuPG)";
 111       break;
 112     case 13: p = VERSION; break;
 113     case 17: p = PRINTABLE_OS_NAME; break;
 114     case 19: p =  _("Please report bugs to <gnupg-bugs@gnu.org>.\n");
 115         break;
 116     case 1:
 117     case 40: p = _("Usage: gpgv [options] [files] (-h for help)");
 118       break;
 119     case 41: p = _("Syntax: gpgv [options] [files]\n"
 120                    "Check signatures against known trusted keys\n");
 121         break;
 122
 123     case 20:
 124       if (!ver_gcry)
 125         ver_gcry = make_libversion ("libgcrypt", gcry_check_version);
 126       p = ver_gcry;
 127       break;
 128
 129
 130     default: p = NULL;
 131     }
 132   return p;
 133 }
 134
 135
 136
 137 int
 138 main( int argc, char **argv )
 139 {
 140   ARGPARSE_ARGS pargs;
 141   int rc=0;
 142   strlist_t sl;
 143   strlist_t nrings=NULL;
 144   unsigned configlineno;
 145
 146   set_strusage (my_strusage);
 147   log_set_prefix ("gpgv", 1);
 148
 149   /* Make sure that our subsystems are ready.  */
 150   i18n_init();
 151   init_common_subsystems ();
 152
 153   gnupg_init_signals (0, NULL);
 154
 155   opt.command_fd = -1; /* no command fd */
 156   opt.pgp2_workarounds = 1;
 157   opt.keyserver_options.options|=KEYSERVER_AUTO_KEY_RETRIEVE;
 158   opt.trust_model = TM_ALWAYS;
 159   opt.batch = 1;
 160
 161   opt.homedir = default_homedir ();
 162
 163   tty_no_terminal(1);
 164   tty_batchmode(1);
 165   disable_dotlock();
 166
 167   pargs.argc = &argc;
 168   pargs.argv = &argv;
 169   pargs.flags=  1;  /* do not remove the args */
 170   while (optfile_parse( NULL, NULL, &configlineno, &pargs, opts))
 171     {
 172       switch (pargs.r_opt)
 173         {
 174         case oQuiet: opt.quiet = 1; break;
 175         case oVerbose:
 176           opt.verbose++;
 177           opt.list_sigs=1;
 178           gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
 179           break;
 180         case oKeyring: append_to_strlist( &nrings, pargs.r.ret_str); break;
 181         case oStatusFD: set_status_fd( pargs.r.ret_int ); break;
 182         case oLoggerFD:
 183           log_set_fd (translate_sys2libc_fd_int (pargs.r.ret_int, 1));
 184           break;
 185         case oHomedir: opt.homedir = pargs.r.ret_str; break;
 186         case oIgnoreTimeConflict: opt.ignore_time_conflict = 1; break;
 187         default : pargs.err = ARGPARSE_PRINT_ERROR; break;
 188         }
 189     }
 190
 191   if (log_get_errorcount (0))
 192     g10_exit(2);
 193
 194   if (opt.verbose > 1)
 195     set_packet_list_mode(1);
 196
 197   if (!nrings)  /* no keyring given: use default one */
 198     keydb_add_resource ("trustedkeys" EXTSEP_S "gpg", 0, 0);
 199   for (sl = nrings; sl; sl = sl->next)
 200     keydb_add_resource (sl->d, 0, 0 );
 201
 202   FREE_STRLIST (nrings);
 203
 204   if ( (rc = verify_signatures( argc, argv ) ))
 205     log_error("verify signatures failed: %s\n", g10_errstr(rc) );
 206
 207   /* cleanup */
 208   g10_exit (0);
 209   return 8; /*NOTREACHED*/
 210 }
 211
 212
 213 void
 214 g10_exit( int rc )
 215 {
 216   rc = rc? rc : log_get_errorcount(0)? 2 : g10_errors_seen? 1 : 0;
 217   exit(rc );
 218 }
 219
 220
 221 /* Stub:
 222  * We have to override the trustcheck from pkclist.c becuase
 223  * this utility assumes that all keys in the keyring are trustworthy
 224  */
 225 int
 226 check_signatures_trust( PKT_signature *sig )
 227 {
 228   (void)sig;
 229   return 0;
 230 }
 231
 232 void
 233 read_trust_options(byte *trust_model, ulong *created, ulong *nextcheck,
 234                    byte *marginals, byte *completes, byte *cert_depth)
 235 {
 236   (void)trust_model;
 237   (void)created;
 238   (void)nextcheck;
 239   (void)marginals;
 240   (void)completes;
 241   (void)cert_depth;
 242 }
 243
 244 /* Stub:
 245  * We don't have the trustdb , so we have to provide some stub functions
 246  * instead
 247  */
 248
 249 int
 250 cache_disabled_value(PKT_public_key *pk)
 251 {
 252   (void)pk;
 253   return 0;
 254 }
 255
 256 void
 257 check_trustdb_stale(void)
 258 {
 259 }
 260
 261 int
 262 get_validity_info (PKT_public_key *pk, PKT_user_id *uid)
 263 {
 264   (void)pk;
 265   (void)uid;
 266   return '?';
 267 }
 268
 269 unsigned int
 270 get_validity (PKT_public_key *pk, PKT_user_id *uid)
 271 {
 272   (void)pk;
 273   (void)uid;
 274   return 0;
 275 }
 276
 277 const char *
 278 trust_value_to_string (unsigned int value)
 279 {
 280   (void)value;
 281   return "err";
 282 }
 283
 284 const char *
 285 uid_trust_string_fixed (PKT_public_key *key, PKT_user_id *uid)
 286 {
 287   (void)key;
 288   (void)uid;
 289   return "err";
 290 }
 291
 292 int
 293 get_ownertrust_info (PKT_public_key *pk)
 294 {
 295   (void)pk;
 296   return '?';
 297 }
 298
 299 unsigned int
 300 get_ownertrust (PKT_public_key *pk)
 301 {
 302   (void)pk;
 303   return TRUST_UNKNOWN;
 304 }
 305
 306
 307 /* Stubs:
 308  * Because we only work with trusted keys, it does not make sense to
 309  * get them from a keyserver
 310  */
 311
 312 struct keyserver_spec *
 313 keyserver_match (struct keyserver_spec *spec)
 314 {
 315   (void)spec;
 316   return NULL;
 317 }
 318
 319 int
 320 keyserver_import_keyid (u32 *keyid, void *dummy)
 321 {
 322   (void)keyid;
 323   (void)dummy;
 324   return -1;
 325 }
 326
 327 int
 328 keyserver_import_cert (const char *name)
 329 {
 330   (void)name;
 331   return -1;
 332 }
 333
 334 int
 335 keyserver_import_pka (const char *name,unsigned char *fpr)
 336 {
 337   (void)name;
 338   (void)fpr;
 339   return -1;
 340 }
 341
 342 int
 343 keyserver_import_name (const char *name,struct keyserver_spec *spec)
 344 {
 345   (void)name;
 346   (void)spec;
 347   return -1;
 348 }
 349
 350 int
 351 keyserver_import_ldap (const char *name)
 352 {
 353   (void)name;
 354   return -1;
 355 }
 356
 357 /* Stub:
 358  * No encryption here but mainproc links to these functions.
 359  */
 360 int
 361 get_session_key (PKT_pubkey_enc *k, DEK *dek)
 362 {
 363   (void)k;
 364   (void)dek;
 365   return G10ERR_GENERAL;
 366 }
 367
 368 /* Stub: */
 369 int
 370 get_override_session_key (DEK *dek, const char *string)
 371 {
 372   (void)dek;
 373   (void)string;
 374   return G10ERR_GENERAL;
 375 }
 376
 377 /* Stub: */
 378 int
 379 decrypt_data (void *procctx, PKT_encrypted *ed, DEK *dek)
 380 {
 381   (void)procctx;
 382   (void)ed;
 383   (void)dek;
 384   return G10ERR_GENERAL;
 385 }
 386
 387
 388 /* Stub:
 389  * No interactive commands, so we don't need the helptexts
 390  */
 391 void
 392 display_online_help (const char *keyword)
 393 {
 394   (void)keyword;
 395 }
 396
 397 /* Stub:
 398  * We don't use secret keys, but getkey.c links to this
 399  */
 400 int
 401 check_secret_key (PKT_secret_key *sk, int n)
 402 {
 403   (void)sk;
 404   (void)n;
 405   return G10ERR_GENERAL;
 406 }
 407
 408 /* Stub:
 409  * No secret key, so no passphrase needed
 410  */
 411 DEK *
 412 passphrase_to_dek (u32 *keyid, int pubkey_algo,
 413                    int cipher_algo, STRING2KEY *s2k, int mode,
 414                    const char *tmp, int *canceled)
 415 {
 416   (void)keyid;
 417   (void)pubkey_algo;
 418   (void)cipher_algo;
 419   (void)s2k;
 420   (void)mode;
 421   (void)tmp;
 422
 423   if (canceled)
 424     *canceled = 0;
 425   return NULL;
 426 }
 427
 428 struct keyserver_spec *
 429 parse_preferred_keyserver(PKT_signature *sig)
 430 {
 431   (void)sig;
 432   return NULL;
 433 }
 434
 435 struct keyserver_spec *
 436 parse_keyserver_uri (const char *uri, int require_scheme,
 437                      const char *configname, unsigned int configlineno)
 438 {
 439   (void)uri;
 440   (void)require_scheme;
 441   (void)configname;
 442   (void)configlineno;
 443   return NULL;
 444 }
 445
 446 void
 447 free_keyserver_spec (struct keyserver_spec *keyserver)
 448 {
 449   (void)keyserver;
 450 }
 451
 452 /* Stubs to avoid linking to photoid.c */
 453 void
 454 show_photos (const struct user_attribute *attrs, int count, PKT_public_key *pk)
 455 {
 456   (void)attrs;
 457   (void)count;
 458   (void)pk;
 459 }
 460
 461 int
 462 parse_image_header (const struct user_attribute *attr, byte *type, u32 *len)
 463 {
 464   (void)attr;
 465   (void)type;
 466   (void)len;
 467   return 0;
 468 }
 469
 470 char *
 471 image_type_to_string (byte type, int string)
 472 {
 473   (void)type;
 474   (void)string;
 475   return NULL;
 476 }
 477
 478 #ifdef ENABLE_CARD_SUPPORT
 479 int
 480 agent_scd_getattr (const char *name, struct agent_card_info_s *info)
 481 {
 482   (void)name;
 483   (void)info;
 484   return 0;
 485 }
 486 #endif /* ENABLE_CARD_SUPPORT */
 487
 488 /* We do not do any locking, so use these stubs here */
 489 void
 490 disable_dotlock (void)
 491 {
 492 }
 493
 494 DOTLOCK
 495 create_dotlock (const char *file_to_lock)
 496 {
 497   (void)file_to_lock;
 498   return NULL;
 499 }
 500
 501 void
 502 destroy_dotlock (DOTLOCK h)
 503 {
 504   (void)h;
 505 }
 506
 507 int
 508 make_dotlock (DOTLOCK h, long timeout)
 509 {
 510   (void)h;
 511   (void)timeout;
 512   return 0;
 513 }
 514
 515 int
 516 release_dotlock (DOTLOCK h)
 517 {
 518   (void)h;
 519   return 0;
 520 }
 521
 522 void
 523 remove_lockfiles (void)
 524 {
 525 }
 526