crypto/openssl-0.9/apps/smime.c

   1 /* smime.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 /* S/MIME utility function */
  60
  61 #include <stdio.h>
  62 #include <string.h>
  63 #include "apps.h"
  64 #include <openssl/crypto.h>
  65 #include <openssl/pem.h>
  66 #include <openssl/err.h>
  67 #include <openssl/x509_vfy.h>
  68 #include <openssl/x509v3.h>
  69
  70 #undef PROG
  71 #define PROG smime_main
  72 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
  73 static int smime_cb(int ok, X509_STORE_CTX *ctx);
  74
  75 #define SMIME_OP        0x10
  76 #define SMIME_ENCRYPT   (1 | SMIME_OP)
  77 #define SMIME_DECRYPT   2
  78 #define SMIME_SIGN      (3 | SMIME_OP)
  79 #define SMIME_VERIFY    4
  80 #define SMIME_PK7OUT    5
  81
  82 int MAIN(int, char **);
  83
  84 int MAIN(int argc, char **argv)
  85         {
  86         ENGINE *e = NULL;
  87         int operation = 0;
  88         int ret = 0;
  89         char **args;
  90         const char *inmode = "r", *outmode = "w";
  91         char *infile = NULL, *outfile = NULL;
  92         char *signerfile = NULL, *recipfile = NULL;
  93         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
  94         const EVP_CIPHER *cipher = NULL;
  95         PKCS7 *p7 = NULL;
  96         X509_STORE *store = NULL;
  97         X509 *cert = NULL, *recip = NULL, *signer = NULL;
  98         EVP_PKEY *key = NULL;
  99         STACK_OF(X509) *encerts = NULL, *other = NULL;
 100         BIO *in = NULL, *out = NULL, *indata = NULL;
 101         int badarg = 0;
 102         int flags = PKCS7_DETACHED;
 103         char *to = NULL, *from = NULL, *subject = NULL;
 104         char *CAfile = NULL, *CApath = NULL;
 105         char *passargin = NULL, *passin = NULL;
 106         char *inrand = NULL;
 107         int need_rand = 0;
 108         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
 109         int keyform = FORMAT_PEM;
 110 #ifndef OPENSSL_NO_ENGINE
 111         char *engine=NULL;
 112 #endif
 113
 114         X509_VERIFY_PARAM *vpm = NULL;
 115
 116         args = argv + 1;
 117         ret = 1;
 118
 119         apps_startup();
 120
 121         if (bio_err == NULL)
 122                 {
 123                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 124                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
 125                 }
 126
 127         if (!load_config(bio_err, NULL))
 128                 goto end;
 129
 130         while (!badarg && *args && *args[0] == '-')
 131                 {
 132                 if (!strcmp (*args, "-encrypt"))
 133                         operation = SMIME_ENCRYPT;
 134                 else if (!strcmp (*args, "-decrypt"))
 135                         operation = SMIME_DECRYPT;
 136                 else if (!strcmp (*args, "-sign"))
 137                         operation = SMIME_SIGN;
 138                 else if (!strcmp (*args, "-verify"))
 139                         operation = SMIME_VERIFY;
 140                 else if (!strcmp (*args, "-pk7out"))
 141                         operation = SMIME_PK7OUT;
 142 #ifndef OPENSSL_NO_DES
 143                 else if (!strcmp (*args, "-des3"))
 144                                 cipher = EVP_des_ede3_cbc();
 145                 else if (!strcmp (*args, "-des"))
 146                                 cipher = EVP_des_cbc();
 147 #endif
 148 #ifndef OPENSSL_NO_SEED
 149                 else if (!strcmp (*args, "-seed"))
 150                                 cipher = EVP_seed_cbc();
 151 #endif
 152 #ifndef OPENSSL_NO_RC2
 153                 else if (!strcmp (*args, "-rc2-40"))
 154                                 cipher = EVP_rc2_40_cbc();
 155                 else if (!strcmp (*args, "-rc2-128"))
 156                                 cipher = EVP_rc2_cbc();
 157                 else if (!strcmp (*args, "-rc2-64"))
 158                                 cipher = EVP_rc2_64_cbc();
 159 #endif
 160 #ifndef OPENSSL_NO_AES
 161                 else if (!strcmp(*args,"-aes128"))
 162                                 cipher = EVP_aes_128_cbc();
 163                 else if (!strcmp(*args,"-aes192"))
 164                                 cipher = EVP_aes_192_cbc();
 165                 else if (!strcmp(*args,"-aes256"))
 166                                 cipher = EVP_aes_256_cbc();
 167 #endif
 168 #ifndef OPENSSL_NO_CAMELLIA
 169                 else if (!strcmp(*args,"-camellia128"))
 170                                 cipher = EVP_camellia_128_cbc();
 171                 else if (!strcmp(*args,"-camellia192"))
 172                                 cipher = EVP_camellia_192_cbc();
 173                 else if (!strcmp(*args,"-camellia256"))
 174                                 cipher = EVP_camellia_256_cbc();
 175 #endif
 176                 else if (!strcmp (*args, "-text"))
 177                                 flags |= PKCS7_TEXT;
 178                 else if (!strcmp (*args, "-nointern"))
 179                                 flags |= PKCS7_NOINTERN;
 180                 else if (!strcmp (*args, "-noverify"))
 181                                 flags |= PKCS7_NOVERIFY;
 182                 else if (!strcmp (*args, "-nochain"))
 183                                 flags |= PKCS7_NOCHAIN;
 184                 else if (!strcmp (*args, "-nocerts"))
 185                                 flags |= PKCS7_NOCERTS;
 186                 else if (!strcmp (*args, "-noattr"))
 187                                 flags |= PKCS7_NOATTR;
 188                 else if (!strcmp (*args, "-nodetach"))
 189                                 flags &= ~PKCS7_DETACHED;
 190                 else if (!strcmp (*args, "-nosmimecap"))
 191                                 flags |= PKCS7_NOSMIMECAP;
 192                 else if (!strcmp (*args, "-binary"))
 193                                 flags |= PKCS7_BINARY;
 194                 else if (!strcmp (*args, "-nosigs"))
 195                                 flags |= PKCS7_NOSIGS;
 196                 else if (!strcmp (*args, "-nooldmime"))
 197                                 flags |= PKCS7_NOOLDMIMETYPE;
 198                 else if (!strcmp (*args, "-crlfeol"))
 199                                 flags |= PKCS7_CRLFEOL;
 200                 else if (!strcmp(*args,"-rand"))
 201                         {
 202                         if (args[1])
 203                                 {
 204                                 args++;
 205                                 inrand = *args;
 206                                 }
 207                         else
 208                                 badarg = 1;
 209                         need_rand = 1;
 210                         }
 211 #ifndef OPENSSL_NO_ENGINE
 212                 else if (!strcmp(*args,"-engine"))
 213                         {
 214                         if (args[1])
 215                                 {
 216                                 args++;
 217                                 engine = *args;
 218                                 }
 219                         else badarg = 1;
 220                         }
 221 #endif
 222                 else if (!strcmp(*args,"-passin"))
 223                         {
 224                         if (args[1])
 225                                 {
 226                                 args++;
 227                                 passargin = *args;
 228                                 }
 229                         else
 230                                 badarg = 1;
 231                         }
 232                 else if (!strcmp (*args, "-to"))
 233                         {
 234                         if (args[1])
 235                                 {
 236                                 args++;
 237                                 to = *args;
 238                                 }
 239                         else
 240                                 badarg = 1;
 241                         }
 242                 else if (!strcmp (*args, "-from"))
 243                         {
 244                         if (args[1])
 245                                 {
 246                                 args++;
 247                                 from = *args;
 248                                 }
 249                         else badarg = 1;
 250                         }
 251                 else if (!strcmp (*args, "-subject"))
 252                         {
 253                         if (args[1])
 254                                 {
 255                                 args++;
 256                                 subject = *args;
 257                                 }
 258                         else
 259                                 badarg = 1;
 260                         }
 261                 else if (!strcmp (*args, "-signer"))
 262                         {
 263                         if (args[1])
 264                                 {
 265                                 args++;
 266                                 signerfile = *args;
 267                                 }
 268                         else
 269                                 badarg = 1;
 270                         }
 271                 else if (!strcmp (*args, "-recip"))
 272                         {
 273                         if (args[1])
 274                                 {
 275                                 args++;
 276                                 recipfile = *args;
 277                                 }
 278                         else badarg = 1;
 279                         }
 280                 else if (!strcmp (*args, "-inkey"))
 281                         {
 282                         if (args[1])
 283                                 {
 284                                 args++;
 285                                 keyfile = *args;
 286                                 }
 287                         else
 288                                 badarg = 1;
 289                 }
 290                 else if (!strcmp (*args, "-keyform"))
 291                         {
 292                         if (args[1])
 293                                 {
 294                                 args++;
 295                                 keyform = str2fmt(*args);
 296                                 }
 297                         else
 298                                 badarg = 1;
 299                         }
 300                 else if (!strcmp (*args, "-certfile"))
 301                         {
 302                         if (args[1])
 303                                 {
 304                                 args++;
 305                                 certfile = *args;
 306                                 }
 307                         else
 308                                 badarg = 1;
 309                         }
 310                 else if (!strcmp (*args, "-CAfile"))
 311                         {
 312                         if (args[1])
 313                                 {
 314                                 args++;
 315                                 CAfile = *args;
 316                                 }
 317                         else
 318                                 badarg = 1;
 319                         }
 320                 else if (!strcmp (*args, "-CApath"))
 321                         {
 322                         if (args[1])
 323                                 {
 324                                 args++;
 325                                 CApath = *args;
 326                                 }
 327                         else
 328                                 badarg = 1;
 329                         }
 330                 else if (!strcmp (*args, "-in"))
 331                         {
 332                         if (args[1])
 333                                 {
 334                                 args++;
 335                                 infile = *args;
 336                                 }
 337                         else
 338                                 badarg = 1;
 339                         }
 340                 else if (!strcmp (*args, "-inform"))
 341                         {
 342                         if (args[1])
 343                                 {
 344                                 args++;
 345                                 informat = str2fmt(*args);
 346                                 }
 347                         else
 348                                 badarg = 1;
 349                         }
 350                 else if (!strcmp (*args, "-outform"))
 351                         {
 352                         if (args[1])
 353                                 {
 354                                 args++;
 355                                 outformat = str2fmt(*args);
 356                                 }
 357                         else
 358                                 badarg = 1;
 359                         }
 360                 else if (!strcmp (*args, "-out"))
 361                         {
 362                         if (args[1])
 363                                 {
 364                                 args++;
 365                                 outfile = *args;
 366                                 }
 367                         else
 368                                 badarg = 1;
 369                         }
 370                 else if (!strcmp (*args, "-content"))
 371                         {
 372                         if (args[1])
 373                                 {
 374                                 args++;
 375                                 contfile = *args;
 376                                 }
 377                         else
 378                                 badarg = 1;
 379                         }
 380                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
 381                         continue;
 382                 else
 383                         badarg = 1;
 384                 args++;
 385                 }
 386
 387
 388         if (operation == SMIME_SIGN)
 389                 {
 390                 if (!signerfile)
 391                         {
 392                         BIO_printf(bio_err, "No signer certificate specified\n");
 393                         badarg = 1;
 394                         }
 395                 need_rand = 1;
 396                 }
 397         else if (operation == SMIME_DECRYPT)
 398                 {
 399                 if (!recipfile && !keyfile)
 400                         {
 401                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
 402                         badarg = 1;
 403                         }
 404                 }
 405         else if (operation == SMIME_ENCRYPT)
 406                 {
 407                 if (!*args)
 408                         {
 409                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 410                         badarg = 1;
 411                         }
 412                 need_rand = 1;
 413                 }
 414         else if (!operation)
 415                 badarg = 1;
 416
 417         if (badarg)
 418                 {
 419                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 420                 BIO_printf (bio_err, "where options are\n");
 421                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 422                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 423                 BIO_printf (bio_err, "-sign          sign message\n");
 424                 BIO_printf (bio_err, "-verify        verify signed message\n");
 425                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
 426 #ifndef OPENSSL_NO_DES
 427                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 428                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 429 #endif
 430 #ifndef OPENSSL_NO_SEED
 431                 BIO_printf (bio_err, "-seed          encrypt with SEED\n");
 432 #endif
 433 #ifndef OPENSSL_NO_RC2
 434                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 435                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 436                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 437 #endif
 438 #ifndef OPENSSL_NO_AES
 439                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 440                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 441 #endif
 442 #ifndef OPENSSL_NO_CAMELLIA
 443                 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
 444                 BIO_printf (bio_err, "               encrypt PEM output with cbc camellia\n");
 445 #endif
 446                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 447                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 448                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 449                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 450                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 451                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 452                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 453                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 454                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 455                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 456                 BIO_printf (bio_err, "-in file       input file\n");
 457                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 458                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 459                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 460                 BIO_printf (bio_err, "-out file      output file\n");
 461                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 462                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 463                 BIO_printf (bio_err, "-to addr       to address\n");
 464                 BIO_printf (bio_err, "-from ad       from address\n");
 465                 BIO_printf (bio_err, "-subject s     subject\n");
 466                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 467                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 468                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 469                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 470                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 471 #ifndef OPENSSL_NO_ENGINE
 472                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 473 #endif
 474                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 475                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 476                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 477                 BIO_printf(bio_err,  "               the random number generator\n");
 478                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 479                 goto end;
 480                 }
 481
 482 #ifndef OPENSSL_NO_ENGINE
 483         e = setup_engine(bio_err, engine, 0);
 484 #endif
 485
 486         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
 487                 {
 488                 BIO_printf(bio_err, "Error getting password\n");
 489                 goto end;
 490                 }
 491
 492         if (need_rand)
 493                 {
 494                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 495                 if (inrand != NULL)
 496                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 497                                 app_RAND_load_files(inrand));
 498                 }
 499
 500         ret = 2;
 501
 502         if (operation != SMIME_SIGN)
 503                 flags &= ~PKCS7_DETACHED;
 504
 505         if (operation & SMIME_OP)
 506                 {
 507                 if (flags & PKCS7_BINARY)
 508                         inmode = "rb";
 509                 if (outformat == FORMAT_ASN1)
 510                         outmode = "wb";
 511                 }
 512         else
 513                 {
 514                 if (flags & PKCS7_BINARY)
 515                         outmode = "wb";
 516                 if (informat == FORMAT_ASN1)
 517                         inmode = "rb";
 518                 }
 519
 520         if (operation == SMIME_ENCRYPT)
 521                 {
 522                 if (!cipher)
 523                         {
 524 #ifndef OPENSSL_NO_RC2
 525                         cipher = EVP_rc2_40_cbc();
 526 #else
 527                         BIO_printf(bio_err, "No cipher selected\n");
 528                         goto end;
 529 #endif
 530                         }
 531                 encerts = sk_X509_new_null();
 532                 while (*args)
 533                         {
 534                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 535                                 NULL, e, "recipient certificate file")))
 536                                 {
 537 #if 0                           /* An appropriate message is already printed */
 538                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 539 #endif
 540                                 goto end;
 541                                 }
 542                         sk_X509_push(encerts, cert);
 543                         cert = NULL;
 544                         args++;
 545                         }
 546                 }
 547
 548         if (signerfile && (operation == SMIME_SIGN))
 549                 {
 550                 if (!(signer = load_cert(bio_err,signerfile,FORMAT_PEM, NULL,
 551                         e, "signer certificate")))
 552                         {
 553 #if 0                   /* An appropri message has already been printed */
 554                         BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
 555 #endif
 556                         goto end;
 557                         }
 558                 }
 559
 560         if (certfile)
 561                 {
 562                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 563                         e, "certificate file")))
 564                         {
 565 #if 0                   /* An appropriate message has already been printed */
 566                         BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
 567 #endif
 568                         ERR_print_errors(bio_err);
 569                         goto end;
 570                         }
 571                 }
 572
 573         if (recipfile && (operation == SMIME_DECRYPT))
 574                 {
 575                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 576                         e, "recipient certificate file")))
 577                         {
 578 #if 0                   /* An appropriate message has alrady been printed */
 579                         BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
 580 #endif
 581                         ERR_print_errors(bio_err);
 582                         goto end;
 583                         }
 584                 }
 585
 586         if (operation == SMIME_DECRYPT)
 587                 {
 588                 if (!keyfile)
 589                         keyfile = recipfile;
 590                 }
 591         else if (operation == SMIME_SIGN)
 592                 {
 593                 if (!keyfile)
 594                         keyfile = signerfile;
 595                 }
 596         else keyfile = NULL;
 597
 598         if (keyfile)
 599                 {
 600                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 601                                "signing key file");
 602                 if (!key)
 603                         goto end;
 604                 }
 605
 606         if (infile)
 607                 {
 608                 if (!(in = BIO_new_file(infile, inmode)))
 609                         {
 610                         BIO_printf (bio_err,
 611                                  "Can't open input file %s\n", infile);
 612                         goto end;
 613                         }
 614                 }
 615         else
 616                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
 617
 618         if (outfile)
 619                 {
 620                 if (!(out = BIO_new_file(outfile, outmode)))
 621                         {
 622                         BIO_printf (bio_err,
 623                                  "Can't open output file %s\n", outfile);
 624                         goto end;
 625                         }
 626                 }
 627         else
 628                 {
 629                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 630 #ifdef OPENSSL_SYS_VMS
 631                 {
 632                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 633                     out = BIO_push(tmpbio, out);
 634                 }
 635 #endif
 636                 }
 637
 638         if (operation == SMIME_VERIFY)
 639                 {
 640                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
 641                         goto end;
 642                 X509_STORE_set_verify_cb_func(store, smime_cb);
 643                 if (vpm)
 644                         X509_STORE_set1_param(store, vpm);
 645                 }
 646
 647
 648         ret = 3;
 649
 650         if (operation == SMIME_ENCRYPT)
 651                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
 652         else if (operation == SMIME_SIGN)
 653                 {
 654                 /* If detached data and SMIME output enable partial
 655                  * signing.
 656                  */
 657                 if ((flags & PKCS7_DETACHED) && (outformat == FORMAT_SMIME))
 658                         flags |= PKCS7_STREAM;
 659                 p7 = PKCS7_sign(signer, key, other, in, flags);
 660                 }
 661         else
 662                 {
 663                 if (informat == FORMAT_SMIME)
 664                         p7 = SMIME_read_PKCS7(in, &indata);
 665                 else if (informat == FORMAT_PEM)
 666                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
 667                 else if (informat == FORMAT_ASN1)
 668                         p7 = d2i_PKCS7_bio(in, NULL);
 669                 else
 670                         {
 671                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
 672                         goto end;
 673                         }
 674
 675                 if (!p7)
 676                         {
 677                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 678                         goto end;
 679                         }
 680                 if (contfile)
 681                         {
 682                         BIO_free(indata);
 683                         if (!(indata = BIO_new_file(contfile, "rb")))
 684                                 {
 685                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 686                                 goto end;
 687                                 }
 688                         }
 689                 }
 690
 691         if (!p7)
 692                 {
 693                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
 694                 goto end;
 695                 }
 696
 697         ret = 4;
 698         if (operation == SMIME_DECRYPT)
 699                 {
 700                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
 701                         {
 702                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
 703                         goto end;
 704                         }
 705                 }
 706         else if (operation == SMIME_VERIFY)
 707                 {
 708                 STACK_OF(X509) *signers;
 709                 if (PKCS7_verify(p7, other, store, indata, out, flags))
 710                         BIO_printf(bio_err, "Verification successful\n");
 711                 else
 712                         {
 713                         BIO_printf(bio_err, "Verification failure\n");
 714                         goto end;
 715                         }
 716                 signers = PKCS7_get0_signers(p7, other, flags);
 717                 if (!save_certs(signerfile, signers))
 718                         {
 719                         BIO_printf(bio_err, "Error writing signers to %s\n",
 720                                                                 signerfile);
 721                         ret = 5;
 722                         goto end;
 723                         }
 724                 sk_X509_free(signers);
 725                 }
 726         else if (operation == SMIME_PK7OUT)
 727                 PEM_write_bio_PKCS7(out, p7);
 728         else
 729                 {
 730                 if (to)
 731                         BIO_printf(out, "To: %s\n", to);
 732                 if (from)
 733                         BIO_printf(out, "From: %s\n", from);
 734                 if (subject)
 735                         BIO_printf(out, "Subject: %s\n", subject);
 736                 if (outformat == FORMAT_SMIME)
 737                         SMIME_write_PKCS7(out, p7, in, flags);
 738                 else if (outformat == FORMAT_PEM)
 739                         PEM_write_bio_PKCS7(out,p7);
 740                 else if (outformat == FORMAT_ASN1)
 741                         i2d_PKCS7_bio(out,p7);
 742                 else
 743                         {
 744                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
 745                         goto end;
 746                         }
 747                 }
 748         ret = 0;
 749 end:
 750         if (need_rand)
 751                 app_RAND_write_file(NULL, bio_err);
 752         if (ret) ERR_print_errors(bio_err);
 753         sk_X509_pop_free(encerts, X509_free);
 754         sk_X509_pop_free(other, X509_free);
 755         if (vpm)
 756                 X509_VERIFY_PARAM_free(vpm);
 757         X509_STORE_free(store);
 758         X509_free(cert);
 759         X509_free(recip);
 760         X509_free(signer);
 761         EVP_PKEY_free(key);
 762         PKCS7_free(p7);
 763         BIO_free(in);
 764         BIO_free(indata);
 765         BIO_free_all(out);
 766         if (passin) OPENSSL_free(passin);
 767         return (ret);
 768 }
 769
 770 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 771         {
 772         int i;
 773         BIO *tmp;
 774         if (!signerfile)
 775                 return 1;
 776         tmp = BIO_new_file(signerfile, "w");
 777         if (!tmp) return 0;
 778         for(i = 0; i < sk_X509_num(signers); i++)
 779                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 780         BIO_free(tmp);
 781         return 1;
 782         }
 783
 784
 785 /* Minimal callback just to output policy info (if any) */
 786
 787 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 788         {
 789         int error;
 790
 791         error = X509_STORE_CTX_get_error(ctx);
 792
 793         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 794                 && ((error != X509_V_OK) || (ok != 2)))
 795                 return ok;
 796
 797         policies_print(NULL, ctx);
 798
 799         return ok;
 800
 801         }