g10/gpgv.c

   1 /* gpgv.c - The GnuPG signature verify utility
   2  * Copyright (C) 1998, 1999, 2000, 2001, 2002,
   3  *               2003 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 2 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, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  20  */
  21
  22 #include <config.h>
  23 #include <errno.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <ctype.h>
  28 #include <unistd.h>
  29 #ifdef HAVE_DOSISH_SYSTEM
  30 #include <fcntl.h> /* for setmode() */
  31 #endif
  32
  33 #define INCLUDED_BY_MAIN_MODULE 1
  34 #include "gpg.h"
  35 #include "packet.h"
  36 #include "iobuf.h"
  37 #include "memory.h"
  38 #include "util.h"
  39 #include "main.h"
  40 #include "options.h"
  41 #include "keydb.h"
  42 #include "trustdb.h"
  43 #include "mpi.h"
  44 #include "cipher.h"
  45 #include "filter.h"
  46 #include "ttyio.h"
  47 #include "i18n.h"
  48 #include "status.h"
  49
  50
  51 enum cmd_and_opt_values { aNull = 0,
  52     oQuiet        = 'q',
  53     oVerbose      = 'v',
  54     oBatch        = 500,
  55     oKeyring,
  56     oIgnoreTimeConflict,
  57     oStatusFD,
  58     oLoggerFD,
  59     oHomedir,
  60 aTest };
  61
  62
  63 static ARGPARSE_OPTS opts[] = {
  64
  65     { 301, NULL, 0, N_("@\nOptions:\n ") },
  66
  67     { oVerbose, "verbose",   0, N_("verbose") },
  68     { oQuiet,   "quiet",     0, N_("be somewhat more quiet") },
  69     { oKeyring, "keyring"   ,2, N_("take the keys from this keyring")},
  70     { oIgnoreTimeConflict, "ignore-time-conflict", 0,
  71                            N_("make timestamp conflicts only a warning") },
  72     { oStatusFD, "status-fd" ,1, N_("|FD|write status info to this FD") },
  73     { oLoggerFD, "logger-fd",1, "@" },
  74     { oHomedir, "homedir", 2, "@" },   /* defaults to "~/.gnupg" */
  75
  76 {0} };
  77
  78
  79
  80 int g10_errors_seen = 0;
  81
  82 #ifdef __riscos__
  83 RISCOS_GLOBAL_STATICS("GnuPG (gpgv) Heap")
  84 #endif /* __riscos__ */
  85
  86 static const char *
  87 my_strusage( int level )
  88 {
  89     const char *p;
  90     switch( level ) {
  91       case 11: p = "gpgv (GnuPG)";
  92         break;
  93       case 13: p = VERSION; break;
  94       case 17: p = PRINTABLE_OS_NAME; break;
  95       case 19: p =
  96             _("Please report bugs to <gnupg-bugs@gnu.org>.\n");
  97         break;
  98       case 1:
  99       case 40:  p =
 100             _("Usage: gpgv [options] [files] (-h for help)");
 101         break;
 102       case 41:  p =
 103             _("Syntax: gpg [options] [files]\n"
 104               "Check signatures against known trusted keys\n");
 105         break;
 106
 107       default:  p = NULL;
 108     }
 109     return p;
 110 }
 111
 112
 113
 114
 115 static void
 116 i18n_init(void)
 117 {
 118 #ifdef USE_SIMPLE_GETTEXT
 119     set_gettext_file( PACKAGE_GT );
 120 #else
 121 #ifdef ENABLE_NLS
 122     setlocale( LC_ALL, "" );
 123     bindtextdomain( PACKAGE_GT, LOCALEDIR );
 124     textdomain( PACKAGE_GT );
 125 #endif
 126 #endif
 127 }
 128
 129
 130 int
 131 main( int argc, char **argv )
 132 {
 133     ARGPARSE_ARGS pargs;
 134     int rc=0;
 135     STRLIST sl;
 136     STRLIST nrings=NULL;
 137     unsigned configlineno;
 138
 139 #ifdef __riscos__
 140     riscos_global_defaults();
 141 #endif /* __riscos__ */
 142
 143     set_strusage (my_strusage);
 144     log_set_prefix ("gpgv", 1);
 145     gnupg_init_signals(0, NULL);
 146     i18n_init();
 147     opt.command_fd = -1; /* no command fd */
 148     opt.pgp2_workarounds = 1;
 149     opt.keyserver_options.auto_key_retrieve = 1;
 150     opt.trust_model = TM_ALWAYS;
 151     opt.batch = 1;
 152
 153     opt.homedir = default_homedir ();
 154
 155     tty_no_terminal(1);
 156     tty_batchmode(1);
 157     disable_dotlock();
 158
 159     set_native_charset (NULL); /* Try to auto set the character set */
 160
 161     pargs.argc = &argc;
 162     pargs.argv = &argv;
 163     pargs.flags=  1;  /* do not remove the args */
 164     while( optfile_parse( NULL, NULL, &configlineno, &pargs, opts) ) {
 165         switch( pargs.r_opt ) {
 166           case oQuiet: opt.quiet = 1; break;
 167           case oVerbose: g10_opt_verbose++;
 168                   opt.verbose++; opt.list_sigs=1; break;
 169           case oKeyring: append_to_strlist( &nrings, pargs.r.ret_str); break;
 170           case oStatusFD: set_status_fd( pargs.r.ret_int ); break;
 171           case oLoggerFD:
 172             log_set_fd (iobuf_translate_file_handle (pargs.r.ret_int, 1));
 173             break;
 174           case oHomedir: opt.homedir = pargs.r.ret_str; break;
 175           case oIgnoreTimeConflict: opt.ignore_time_conflict = 1; break;
 176           default : pargs.err = 2; break;
 177         }
 178     }
 179
 180     if( log_get_errorcount(0) )
 181         g10_exit(2);
 182
 183     g10_opt_homedir = opt.homedir;
 184
 185     if( opt.verbose > 1 )
 186         set_packet_list_mode(1);
 187
 188     if( !nrings )  /* no keyring given: use default one */
 189         keydb_add_resource ("trustedkeys" EXTSEP_S "gpg", 0, 0);
 190     for(sl = nrings; sl; sl = sl->next )
 191         keydb_add_resource (sl->d, 0, 0 );
 192
 193     FREE_STRLIST(nrings);
 194
 195     if( (rc = verify_signatures( argc, argv ) ))
 196         log_error("verify signatures failed: %s\n", gpg_strerror (rc) );
 197
 198     /* cleanup */
 199     g10_exit(0);
 200     return 8; /*NEVER REACHED*/
 201 }
 202
 203
 204 void
 205 g10_exit( int rc )
 206 {
 207     rc = rc? rc : log_get_errorcount(0)? 2 :
 208                         g10_errors_seen? 1 : 0;
 209     exit(rc );
 210 }
 211
 212
 213
 214 void
 215 read_trust_options (byte *trust_model,ulong *created,ulong *nextcheck,
 216                     byte *marginals,byte *completes,byte *cert_depth)
 217 {
 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     return 0;
 229 }
 230
 231
 232 /* Stub:
 233  * We don't have the trustdb , so we have to provide some stub functions
 234  * instead
 235  */
 236
 237 int
 238 cache_disabled_value(PKT_public_key *pk)
 239 {
 240   return 0;
 241 }
 242
 243 int
 244 get_validity_info (PKT_public_key *pk, PKT_user_id *uid)
 245 {
 246     return '?';
 247 }
 248
 249 unsigned int
 250 get_validity (PKT_public_key *pk, PKT_user_id *uid)
 251 {
 252   return 0;
 253 }
 254
 255 const char *
 256 trust_value_to_string (unsigned int value)
 257 {
 258   return "err";
 259 }
 260
 261 /* Stub: */
 262 int
 263 get_ownertrust_info (PKT_public_key *pk)
 264 {
 265     return '?';
 266 }
 267
 268 unsigned int
 269 get_ownertrust (PKT_public_key *pk)
 270 {
 271     return TRUST_UNKNOWN;
 272 }
 273
 274
 275 /* Stub:
 276  * Because we only work with trusted keys, it does not make sense to
 277  * get them from a keyserver
 278  */
 279 int
 280 keyserver_import_keyid( u32 *keyid, void *dummy )
 281 {
 282     return -1;
 283 }
 284
 285 /* Stub:
 286  * No encryption here but mainproc links to these functions.
 287  */
 288 int
 289 get_session_key( PKT_pubkey_enc *k, DEK *dek )
 290 {
 291     return GPG_ERR_GENERAL;
 292 }
 293 /* Stub: */
 294 int
 295 get_override_session_key( DEK *dek, const char *string )
 296 {
 297     return GPG_ERR_GENERAL;
 298 }
 299 /* Stub: */
 300 int
 301 decrypt_data( void *procctx, PKT_encrypted *ed, DEK *dek )
 302 {
 303     return GPG_ERR_GENERAL;
 304 }
 305
 306
 307 /* Stub:
 308  * No interactive commnds, so we don't need the helptexts
 309  */
 310 void
 311 display_online_help( const char *keyword )
 312 {
 313 }
 314
 315 /* Stub:
 316  * We don't use secret keys, but getkey.c links to this
 317  */
 318 int
 319 check_secret_key( PKT_secret_key *sk, int n )
 320 {
 321     return GPG_ERR_GENERAL;
 322 }
 323
 324 /* Stub:
 325  * No secret key, so no passphrase needed
 326  */
 327 DEK *
 328 passphrase_to_dek( u32 *keyid, int pubkey_algo,
 329                    int cipher_algo, STRING2KEY *s2k, int mode,
 330                    const char *tmp, int *canceled)
 331 {
 332   if (canceled)
 333     *canceled = 0;
 334   return NULL;
 335 }
 336
 337 /* Stubs to avoid linking to photoid.c */
 338 void show_photos(const struct user_attribute *attrs,int count,PKT_public_key *pk) {}
 339 int parse_image_header(const struct user_attribute *attr,byte *type,u32 *len) {return 0;}
 340 char *image_type_to_string(byte type,int string) {return NULL;}
 341
 342 /* Stubs to void linking to ../cipher/cipher.c */
 343 int string_to_cipher_algo( const char *string ) { return 0; }
 344 const char *cipher_algo_to_string( int algo ) { return "?";}
 345 void disable_cipher_algo( int algo ) {}
 346 int check_cipher_algo( int algo ) { return -1;}
 347 unsigned int cipher_get_keylen( int algo ) { return 0; }
 348 unsigned int cipher_get_blocksize( int algo ) {return 0;}
 349 CIPHER_HANDLE cipher_open( int algo, int mode, int secure ) { return NULL;}
 350 void cipher_close( CIPHER_HANDLE c ) {}
 351 int cipher_setkey( CIPHER_HANDLE c, byte *key, unsigned keylen ) { return -1;}
 352 void cipher_setiv( CIPHER_HANDLE c, const byte *iv, unsigned ivlen ){}
 353 void cipher_encrypt( CIPHER_HANDLE c, byte *outbuf,
 354                      byte *inbuf, unsigned nbytes ) {}
 355 void cipher_decrypt( CIPHER_HANDLE c, byte *outbuf,
 356                      byte *inbuf, unsigned nbytes ) {}
 357 void cipher_sync( CIPHER_HANDLE c ) {}
 358
 359
 360 /* Stubs to avoid linking to ../util/ttyio.c */
 361 int tty_batchmode( int onoff ) { return 0; }
 362 void tty_printf( const char *fmt, ... ) { }
 363 void tty_print_string( const byte *p, size_t n ) { }
 364 void tty_print_utf8_string( const byte *p, size_t n ) {}
 365 void tty_print_utf8_string2( const byte *p, size_t n, size_t max_n ) {}
 366 char *tty_get( const char *prompt ) { return NULL;}
 367 char *tty_get_hidden( const char *prompt ) {return NULL; }
 368 void tty_kill_prompt(void) {}
 369 int tty_get_answer_is_yes( const char *prompt ) {return 0;}
 370 int tty_no_terminal(int onoff) {return 0;}
 371
 372 /* We do not do any locking, so use these stubs here */
 373 void disable_dotlock(void) {}
 374 DOTLOCK create_dotlock( const char *file_to_lock ) { return NULL; }
 375 int make_dotlock( DOTLOCK h, long timeout ) { return 0;}
 376 int release_dotlock( DOTLOCK h ) {return 0;}
 377 void dotlock_remove_lockfiles(void) {}