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 <@EMAIL@>.\n"); break;
 115
 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   /* Note: We open all keyrings in read-only mode (flag value: 8).  */
 198   if (!nrings)  /* No keyring given: use default one. */
 199     keydb_add_resource ("trustedkeys" EXTSEP_S "gpg", 8, 0);
 200   for (sl = nrings; sl; sl = sl->next)
 201     keydb_add_resource (sl->d, 8, 0 );
 202
 203   FREE_STRLIST (nrings);
 204
 205   if ( (rc = verify_signatures( argc, argv ) ))
 206     log_error("verify signatures failed: %s\n", g10_errstr(rc) );
 207
 208   /* cleanup */
 209   g10_exit (0);
 210   return 8; /*NOTREACHED*/
 211 }
 212
 213
 214 void
 215 g10_exit( int rc )
 216 {
 217   rc = rc? rc : log_get_errorcount(0)? 2 : g10_errors_seen? 1 : 0;
 218   exit(rc );
 219 }
 220
 221
 222 /* Stub:
 223  * We have to override the trustcheck from pkclist.c becuase
 224  * this utility assumes that all keys in the keyring are trustworthy
 225  */
 226 int
 227 check_signatures_trust( PKT_signature *sig )
 228 {
 229   (void)sig;
 230   return 0;
 231 }
 232
 233 void
 234 read_trust_options(byte *trust_model, ulong *created, ulong *nextcheck,
 235                    byte *marginals, byte *completes, byte *cert_depth)
 236 {
 237   (void)trust_model;
 238   (void)created;
 239   (void)nextcheck;
 240   (void)marginals;
 241   (void)completes;
 242   (void)cert_depth;
 243 }
 244
 245 /* Stub:
 246  * We don't have the trustdb , so we have to provide some stub functions
 247  * instead
 248  */
 249
 250 int
 251 cache_disabled_value(PKT_public_key *pk)
 252 {
 253   (void)pk;
 254   return 0;
 255 }
 256
 257 void
 258 check_trustdb_stale(void)
 259 {
 260 }
 261
 262 int
 263 get_validity_info (PKT_public_key *pk, PKT_user_id *uid)
 264 {
 265   (void)pk;
 266   (void)uid;
 267   return '?';
 268 }
 269
 270 unsigned int
 271 get_validity (PKT_public_key *pk, PKT_user_id *uid)
 272 {
 273   (void)pk;
 274   (void)uid;
 275   return 0;
 276 }
 277
 278 const char *
 279 trust_value_to_string (unsigned int value)
 280 {
 281   (void)value;
 282   return "err";
 283 }
 284
 285 const char *
 286 uid_trust_string_fixed (PKT_public_key *key, PKT_user_id *uid)
 287 {
 288   (void)key;
 289   (void)uid;
 290   return "err";
 291 }
 292
 293 int
 294 get_ownertrust_info (PKT_public_key *pk)
 295 {
 296   (void)pk;
 297   return '?';
 298 }
 299
 300 unsigned int
 301 get_ownertrust (PKT_public_key *pk)
 302 {
 303   (void)pk;
 304   return TRUST_UNKNOWN;
 305 }
 306
 307
 308 /* Stubs:
 309  * Because we only work with trusted keys, it does not make sense to
 310  * get them from a keyserver
 311  */
 312
 313 struct keyserver_spec *
 314 keyserver_match (struct keyserver_spec *spec)
 315 {
 316   (void)spec;
 317   return NULL;
 318 }
 319
 320 int
 321 keyserver_import_keyid (u32 *keyid, void *dummy)
 322 {
 323   (void)keyid;
 324   (void)dummy;
 325   return -1;
 326 }
 327
 328 int
 329 keyserver_import_cert (const char *name)
 330 {
 331   (void)name;
 332   return -1;
 333 }
 334
 335 int
 336 keyserver_import_pka (const char *name,unsigned char *fpr)
 337 {
 338   (void)name;
 339   (void)fpr;
 340   return -1;
 341 }
 342
 343 int
 344 keyserver_import_name (const char *name,struct keyserver_spec *spec)
 345 {
 346   (void)name;
 347   (void)spec;
 348   return -1;
 349 }
 350
 351 int
 352 keyserver_import_ldap (const char *name)
 353 {
 354   (void)name;
 355   return -1;
 356 }
 357
 358 /* Stub:
 359  * No encryption here but mainproc links to these functions.
 360  */
 361 int
 362 get_session_key (PKT_pubkey_enc *k, DEK *dek)
 363 {
 364   (void)k;
 365   (void)dek;
 366   return G10ERR_GENERAL;
 367 }
 368
 369 /* Stub: */
 370 int
 371 get_override_session_key (DEK *dek, const char *string)
 372 {
 373   (void)dek;
 374   (void)string;
 375   return G10ERR_GENERAL;
 376 }
 377
 378 /* Stub: */
 379 int
 380 decrypt_data (void *procctx, PKT_encrypted *ed, DEK *dek)
 381 {
 382   (void)procctx;
 383   (void)ed;
 384   (void)dek;
 385   return G10ERR_GENERAL;
 386 }
 387
 388
 389 /* Stub:
 390  * No interactive commands, so we don't need the helptexts
 391  */
 392 void
 393 display_online_help (const char *keyword)
 394 {
 395   (void)keyword;
 396 }
 397
 398 /* Stub:
 399  * We don't use secret keys, but getkey.c links to this
 400  */
 401 int
 402 check_secret_key (PKT_secret_key *sk, int n)
 403 {
 404   (void)sk;
 405   (void)n;
 406   return G10ERR_GENERAL;
 407 }
 408
 409 /* Stub:
 410  * No secret key, so no passphrase needed
 411  */
 412 DEK *
 413 passphrase_to_dek (u32 *keyid, int pubkey_algo,
 414                    int cipher_algo, STRING2KEY *s2k, int mode,
 415                    const char *tmp, int *canceled)
 416 {
 417   (void)keyid;
 418   (void)pubkey_algo;
 419   (void)cipher_algo;
 420   (void)s2k;
 421   (void)mode;
 422   (void)tmp;
 423
 424   if (canceled)
 425     *canceled = 0;
 426   return NULL;
 427 }
 428
 429 void
 430 passphrase_clear_cache (u32 *keyid, const char *cacheid, int algo)
 431 {
 432   (void)keyid;
 433   (void)cacheid;
 434   (void)algo;
 435 }
 436
 437 struct keyserver_spec *
 438 parse_preferred_keyserver(PKT_signature *sig)
 439 {
 440   (void)sig;
 441   return NULL;
 442 }
 443
 444 struct keyserver_spec *
 445 parse_keyserver_uri (const char *uri, int require_scheme,
 446                      const char *configname, unsigned int configlineno)
 447 {
 448   (void)uri;
 449   (void)require_scheme;
 450   (void)configname;
 451   (void)configlineno;
 452   return NULL;
 453 }
 454
 455 void
 456 free_keyserver_spec (struct keyserver_spec *keyserver)
 457 {
 458   (void)keyserver;
 459 }
 460
 461 /* Stubs to avoid linking to photoid.c */
 462 void
 463 show_photos (const struct user_attribute *attrs, int count, PKT_public_key *pk)
 464 {
 465   (void)attrs;
 466   (void)count;
 467   (void)pk;
 468 }
 469
 470 int
 471 parse_image_header (const struct user_attribute *attr, byte *type, u32 *len)
 472 {
 473   (void)attr;
 474   (void)type;
 475   (void)len;
 476   return 0;
 477 }
 478
 479 char *
 480 image_type_to_string (byte type, int string)
 481 {
 482   (void)type;
 483   (void)string;
 484   return NULL;
 485 }
 486
 487 #ifdef ENABLE_CARD_SUPPORT
 488 int
 489 agent_scd_getattr (const char *name, struct agent_card_info_s *info)
 490 {
 491   (void)name;
 492   (void)info;
 493   return 0;
 494 }
 495 #endif /* ENABLE_CARD_SUPPORT */
 496
 497 /* We do not do any locking, so use these stubs here */
 498 void
 499 disable_dotlock (void)
 500 {
 501 }
 502
 503 dotlock_t
 504 create_dotlock (const char *file_to_lock)
 505 {
 506   (void)file_to_lock;
 507   return NULL;
 508 }
 509
 510 void
 511 destroy_dotlock (dotlock_t h)
 512 {
 513   (void)h;
 514 }
 515
 516 int
 517 make_dotlock (dotlock_t h, long timeout)
 518 {
 519   (void)h;
 520   (void)timeout;
 521   return 0;
 522 }
 523
 524 int
 525 release_dotlock (dotlock_t h)
 526 {
 527   (void)h;
 528   return 0;
 529 }
 530
 531 void
 532 remove_lockfiles (void)
 533 {
 534 }
 535