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         STACK *sksigners = NULL, *skkeys = NULL;
  94         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
  95         const EVP_CIPHER *cipher = NULL;
  96         PKCS7 *p7 = NULL;
  97         X509_STORE *store = NULL;
  98         X509 *cert = NULL, *recip = NULL, *signer = NULL;
  99         EVP_PKEY *key = NULL;
 100         STACK_OF(X509) *encerts = NULL, *other = NULL;
 101         BIO *in = NULL, *out = NULL, *indata = NULL;
 102         int badarg = 0;
 103         int flags = PKCS7_DETACHED;
 104         char *to = NULL, *from = NULL, *subject = NULL;
 105         char *CAfile = NULL, *CApath = NULL;
 106         char *passargin = NULL, *passin = NULL;
 107         char *inrand = NULL;
 108         int need_rand = 0;
 109         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
 110         int keyform = FORMAT_PEM;
 111 #ifndef OPENSSL_NO_ENGINE
 112         char *engine=NULL;
 113 #endif
 114
 115         X509_VERIFY_PARAM *vpm = NULL;
 116
 117         args = argv + 1;
 118         ret = 1;
 119
 120         apps_startup();
 121
 122         if (bio_err == NULL)
 123                 {
 124                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 125                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
 126                 }
 127
 128         if (!load_config(bio_err, NULL))
 129                 goto end;
 130
 131         while (!badarg && *args && *args[0] == '-')
 132                 {
 133                 if (!strcmp (*args, "-encrypt"))
 134                         operation = SMIME_ENCRYPT;
 135                 else if (!strcmp (*args, "-decrypt"))
 136                         operation = SMIME_DECRYPT;
 137                 else if (!strcmp (*args, "-sign"))
 138                         operation = SMIME_SIGN;
 139                 else if (!strcmp (*args, "-verify"))
 140                         operation = SMIME_VERIFY;
 141                 else if (!strcmp (*args, "-pk7out"))
 142                         operation = SMIME_PK7OUT;
 143 #ifndef OPENSSL_NO_DES
 144                 else if (!strcmp (*args, "-des3"))
 145                                 cipher = EVP_des_ede3_cbc();
 146                 else if (!strcmp (*args, "-des"))
 147                                 cipher = EVP_des_cbc();
 148 #endif
 149 #ifndef OPENSSL_NO_RC2
 150                 else if (!strcmp (*args, "-rc2-40"))
 151                                 cipher = EVP_rc2_40_cbc();
 152                 else if (!strcmp (*args, "-rc2-128"))
 153                                 cipher = EVP_rc2_cbc();
 154                 else if (!strcmp (*args, "-rc2-64"))
 155                                 cipher = EVP_rc2_64_cbc();
 156 #endif
 157 #ifndef OPENSSL_NO_AES
 158                 else if (!strcmp(*args,"-aes128"))
 159                                 cipher = EVP_aes_128_cbc();
 160                 else if (!strcmp(*args,"-aes192"))
 161                                 cipher = EVP_aes_192_cbc();
 162                 else if (!strcmp(*args,"-aes256"))
 163                                 cipher = EVP_aes_256_cbc();
 164 #endif
 165                 else if (!strcmp (*args, "-text"))
 166                                 flags |= PKCS7_TEXT;
 167                 else if (!strcmp (*args, "-nointern"))
 168                                 flags |= PKCS7_NOINTERN;
 169                 else if (!strcmp (*args, "-noverify"))
 170                                 flags |= PKCS7_NOVERIFY;
 171                 else if (!strcmp (*args, "-nochain"))
 172                                 flags |= PKCS7_NOCHAIN;
 173                 else if (!strcmp (*args, "-nocerts"))
 174                                 flags |= PKCS7_NOCERTS;
 175                 else if (!strcmp (*args, "-noattr"))
 176                                 flags |= PKCS7_NOATTR;
 177                 else if (!strcmp (*args, "-nodetach"))
 178                                 flags &= ~PKCS7_DETACHED;
 179                 else if (!strcmp (*args, "-nosmimecap"))
 180                                 flags |= PKCS7_NOSMIMECAP;
 181                 else if (!strcmp (*args, "-binary"))
 182                                 flags |= PKCS7_BINARY;
 183                 else if (!strcmp (*args, "-nosigs"))
 184                                 flags |= PKCS7_NOSIGS;
 185                 else if (!strcmp (*args, "-nooldmime"))
 186                                 flags |= PKCS7_NOOLDMIMETYPE;
 187                 else if (!strcmp (*args, "-crlfeol"))
 188                                 flags |= PKCS7_CRLFEOL;
 189                 else if (!strcmp(*args,"-rand"))
 190                         {
 191                         if (!args[1])
 192                                 goto argerr;
 193                         args++;
 194                         inrand = *args;
 195                         need_rand = 1;
 196                         }
 197 #ifndef OPENSSL_NO_ENGINE
 198                 else if (!strcmp(*args,"-engine"))
 199                         {
 200                         if (!args[1])
 201                                 goto argerr;
 202                         engine = *++args;
 203                         }
 204 #endif
 205                 else if (!strcmp(*args,"-passin"))
 206                         {
 207                         if (!args[1])
 208                                 goto argerr;
 209                         passargin = *++args;
 210                         }
 211                 else if (!strcmp (*args, "-to"))
 212                         {
 213                         if (!args[1])
 214                                 goto argerr;
 215                         to = *++args;
 216                         }
 217                 else if (!strcmp (*args, "-from"))
 218                         {
 219                         if (!args[1])
 220                                 goto argerr;
 221                         from = *++args;
 222                         }
 223                 else if (!strcmp (*args, "-subject"))
 224                         {
 225                         if (!args[1])
 226                                 goto argerr;
 227                         subject = *++args;
 228                         }
 229                 else if (!strcmp (*args, "-signer"))
 230                         {
 231                         if (!args[1])
 232                                 goto argerr;
 233                         /* If previous -signer argument add signer to list */
 234
 235                         if (signerfile)
 236                                 {
 237                                 if (!sksigners)
 238                                         sksigners = sk_new_null();
 239                                 sk_push(sksigners, signerfile);
 240                                 if (!keyfile)
 241                                         keyfile = signerfile;
 242                                 if (!skkeys)
 243                                         skkeys = sk_new_null();
 244                                 sk_push(skkeys, keyfile);
 245                                 keyfile = NULL;
 246                                 }
 247                         signerfile = *++args;
 248                         }
 249                 else if (!strcmp (*args, "-recip"))
 250                         {
 251                         if (!args[1])
 252                                 goto argerr;
 253                         recipfile = *++args;
 254                         }
 255                 else if (!strcmp (*args, "-inkey"))
 256                         {
 257                         if (!args[1])
 258                                 goto argerr;
 259                         /* If previous -inkey arument add signer to list */
 260                         if (keyfile)
 261                                 {
 262                                 if (!signerfile)
 263                                         {
 264                                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 265                                         goto argerr;
 266                                         }
 267                                 if (!sksigners)
 268                                         sksigners = sk_new_null();
 269                                 sk_push(sksigners, signerfile);
 270                                 signerfile = NULL;
 271                                 if (!skkeys)
 272                                         skkeys = sk_new_null();
 273                                 sk_push(skkeys, keyfile);
 274                                 }
 275                         keyfile = *++args;
 276                         }
 277                 else if (!strcmp (*args, "-keyform"))
 278                         {
 279                         if (!args[1])
 280                                 goto argerr;
 281                         keyform = str2fmt(*++args);
 282                         }
 283                 else if (!strcmp (*args, "-certfile"))
 284                         {
 285                         if (!args[1])
 286                                 goto argerr;
 287                         certfile = *++args;
 288                         }
 289                 else if (!strcmp (*args, "-CAfile"))
 290                         {
 291                         if (!args[1])
 292                                 goto argerr;
 293                         CAfile = *++args;
 294                         }
 295                 else if (!strcmp (*args, "-CApath"))
 296                         {
 297                         if (!args[1])
 298                                 goto argerr;
 299                         CApath = *++args;
 300                         }
 301                 else if (!strcmp (*args, "-in"))
 302                         {
 303                         if (!args[1])
 304                                 goto argerr;
 305                         infile = *++args;
 306                         }
 307                 else if (!strcmp (*args, "-inform"))
 308                         {
 309                         if (!args[1])
 310                                 goto argerr;
 311                         informat = str2fmt(*++args);
 312                         }
 313                 else if (!strcmp (*args, "-outform"))
 314                         {
 315                         if (!args[1])
 316                                 goto argerr;
 317                         outformat = str2fmt(*++args);
 318                         }
 319                 else if (!strcmp (*args, "-out"))
 320                         {
 321                         if (!args[1])
 322                                 goto argerr;
 323                         outfile = *++args;
 324                         }
 325                 else if (!strcmp (*args, "-content"))
 326                         {
 327                         if (!args[1])
 328                                 goto argerr;
 329                         contfile = *++args;
 330                         }
 331                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
 332                         continue;
 333                 else
 334                         badarg = 1;
 335                 args++;
 336                 }
 337
 338         if ((operation != SMIME_SIGN) && (skkeys || sksigners))
 339                 {
 340                 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
 341                 goto argerr;
 342                 }
 343
 344         if (operation == SMIME_SIGN)
 345                 {
 346                 /* Check to see if any final signer needs to be appended */
 347                 if (keyfile && !signerfile)
 348                         {
 349                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 350                         goto argerr;
 351                         }
 352                 if (signerfile)
 353                         {
 354                         if (!sksigners)
 355                                 sksigners = sk_new_null();
 356                         sk_push(sksigners, signerfile);
 357                         if (!skkeys)
 358                                 skkeys = sk_new_null();
 359                         if (!keyfile)
 360                                 keyfile = signerfile;
 361                         sk_push(skkeys, keyfile);
 362                         }
 363                 if (!sksigners)
 364                         {
 365                         BIO_printf(bio_err, "No signer certificate specified\n");
 366                         badarg = 1;
 367                         }
 368                 signerfile = NULL;
 369                 keyfile = NULL;
 370                 need_rand = 1;
 371                 }
 372         else if (operation == SMIME_DECRYPT)
 373                 {
 374                 if (!recipfile && !keyfile)
 375                         {
 376                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
 377                         badarg = 1;
 378                         }
 379                 }
 380         else if (operation == SMIME_ENCRYPT)
 381                 {
 382                 if (!*args)
 383                         {
 384                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 385                         badarg = 1;
 386                         }
 387                 need_rand = 1;
 388                 }
 389         else if (!operation)
 390                 badarg = 1;
 391
 392         if (badarg)
 393                 {
 394                 argerr:
 395                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 396                 BIO_printf (bio_err, "where options are\n");
 397                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 398                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 399                 BIO_printf (bio_err, "-sign          sign message\n");
 400                 BIO_printf (bio_err, "-verify        verify signed message\n");
 401                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
 402 #ifndef OPENSSL_NO_DES
 403                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 404                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 405 #endif
 406 #ifndef OPENSSL_NO_RC2
 407                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 408                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 409                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 410 #endif
 411 #ifndef OPENSSL_NO_AES
 412                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 413                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 414 #endif
 415                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 416                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 417                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 418                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 419                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 420                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 421                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 422                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 423                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 424                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 425                 BIO_printf (bio_err, "-in file       input file\n");
 426                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 427                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 428                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 429                 BIO_printf (bio_err, "-out file      output file\n");
 430                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 431                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 432                 BIO_printf (bio_err, "-to addr       to address\n");
 433                 BIO_printf (bio_err, "-from ad       from address\n");
 434                 BIO_printf (bio_err, "-subject s     subject\n");
 435                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 436                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 437                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 438                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 439                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 440 #ifndef OPENSSL_NO_ENGINE
 441                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 442 #endif
 443                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 444                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 445                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 446                 BIO_printf(bio_err,  "               the random number generator\n");
 447                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 448                 goto end;
 449                 }
 450
 451 #ifndef OPENSSL_NO_ENGINE
 452         e = setup_engine(bio_err, engine, 0);
 453 #endif
 454
 455         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
 456                 {
 457                 BIO_printf(bio_err, "Error getting password\n");
 458                 goto end;
 459                 }
 460
 461         if (need_rand)
 462                 {
 463                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 464                 if (inrand != NULL)
 465                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 466                                 app_RAND_load_files(inrand));
 467                 }
 468
 469         ret = 2;
 470
 471         if (operation != SMIME_SIGN)
 472                 flags &= ~PKCS7_DETACHED;
 473
 474         if (operation & SMIME_OP)
 475                 {
 476                 if (flags & PKCS7_BINARY)
 477                         inmode = "rb";
 478                 if (outformat == FORMAT_ASN1)
 479                         outmode = "wb";
 480                 }
 481         else
 482                 {
 483                 if (flags & PKCS7_BINARY)
 484                         outmode = "wb";
 485                 if (informat == FORMAT_ASN1)
 486                         inmode = "rb";
 487                 }
 488
 489         if (operation == SMIME_ENCRYPT)
 490                 {
 491                 if (!cipher)
 492                         {
 493 #ifndef OPENSSL_NO_RC2
 494                         cipher = EVP_rc2_40_cbc();
 495 #else
 496                         BIO_printf(bio_err, "No cipher selected\n");
 497                         goto end;
 498 #endif
 499                         }
 500                 encerts = sk_X509_new_null();
 501                 while (*args)
 502                         {
 503                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 504                                 NULL, e, "recipient certificate file")))
 505                                 {
 506 #if 0                           /* An appropriate message is already printed */
 507                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 508 #endif
 509                                 goto end;
 510                                 }
 511                         sk_X509_push(encerts, cert);
 512                         cert = NULL;
 513                         args++;
 514                         }
 515                 }
 516
 517         if (signerfile && (operation == SMIME_SIGN))
 518                 {
 519                 if (!(signer = load_cert(bio_err,signerfile,FORMAT_PEM, NULL,
 520                         e, "signer certificate")))
 521                         {
 522 #if 0                   /* An appropri message has already been printed */
 523                         BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
 524 #endif
 525                         goto end;
 526                         }
 527                 }
 528
 529         if (certfile)
 530                 {
 531                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 532                         e, "certificate file")))
 533                         {
 534 #if 0                   /* An appropriate message has already been printed */
 535                         BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
 536 #endif
 537                         ERR_print_errors(bio_err);
 538                         goto end;
 539                         }
 540                 }
 541
 542         if (recipfile && (operation == SMIME_DECRYPT))
 543                 {
 544                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 545                         e, "recipient certificate file")))
 546                         {
 547 #if 0                   /* An appropriate message has alrady been printed */
 548                         BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
 549 #endif
 550                         ERR_print_errors(bio_err);
 551                         goto end;
 552                         }
 553                 }
 554
 555         if (operation == SMIME_DECRYPT)
 556                 {
 557                 if (!keyfile)
 558                         keyfile = recipfile;
 559                 }
 560         else if (operation == SMIME_SIGN)
 561                 {
 562                 if (!keyfile)
 563                         keyfile = signerfile;
 564                 }
 565         else keyfile = NULL;
 566
 567         if (keyfile)
 568                 {
 569                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 570                                "signing key file");
 571                 if (!key)
 572                         goto end;
 573                 }
 574
 575         if (infile)
 576                 {
 577                 if (!(in = BIO_new_file(infile, inmode)))
 578                         {
 579                         BIO_printf (bio_err,
 580                                  "Can't open input file %s\n", infile);
 581                         goto end;
 582                         }
 583                 }
 584         else
 585                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
 586
 587         if (outfile)
 588                 {
 589                 if (!(out = BIO_new_file(outfile, outmode)))
 590                         {
 591                         BIO_printf (bio_err,
 592                                  "Can't open output file %s\n", outfile);
 593                         goto end;
 594                         }
 595                 }
 596         else
 597                 {
 598                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 599 #ifdef OPENSSL_SYS_VMS
 600                 {
 601                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 602                     out = BIO_push(tmpbio, out);
 603                 }
 604 #endif
 605                 }
 606
 607         if (operation == SMIME_VERIFY)
 608                 {
 609                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
 610                         goto end;
 611                 X509_STORE_set_verify_cb_func(store, smime_cb);
 612                 if (vpm)
 613                         X509_STORE_set1_param(store, vpm);
 614                 }
 615
 616
 617         ret = 3;
 618
 619         if (operation == SMIME_ENCRYPT)
 620                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
 621         else if (operation == SMIME_SIGN)
 622                 {
 623                 int i;
 624                 /* If detached data and SMIME output enable partial
 625                  * signing.
 626                  */
 627                 if ((flags & PKCS7_DETACHED) && (outformat == FORMAT_SMIME))
 628                         flags |= PKCS7_STREAM;
 629                 flags |= PKCS7_PARTIAL;
 630                 p7 = PKCS7_sign(NULL, NULL, other, in, flags);
 631                 for (i = 0; i < sk_num(sksigners); i++)
 632                         {
 633                         signerfile = sk_value(sksigners, i);
 634                         keyfile = sk_value(skkeys, i);
 635                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
 636                                         e, "signer certificate");
 637                         if (!signer)
 638                                 goto end;
 639                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 640                                "signing key file");
 641                         if (!key)
 642                                 goto end;
 643                         if (!PKCS7_sign_add_signer(p7, signer, key,
 644                                                 NULL, flags))
 645                                 goto end;
 646                         X509_free(signer);
 647                         signer = NULL;
 648                         EVP_PKEY_free(key);
 649                         key = NULL;
 650                         }
 651                 /* If not streaming finalize structure */
 652                 if (!(flags & PKCS7_STREAM))
 653                         {
 654                         if (!PKCS7_final(p7, in, flags))
 655                                 goto end;
 656                         if (BIO_reset(in) != 0)
 657                                 {
 658                                 BIO_puts(bio_err, "Can't rewind input file\n");
 659                                 goto end;
 660                                 }
 661                         }
 662                 }
 663         else
 664                 {
 665                 if (informat == FORMAT_SMIME)
 666                         p7 = SMIME_read_PKCS7(in, &indata);
 667                 else if (informat == FORMAT_PEM)
 668                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
 669                 else if (informat == FORMAT_ASN1)
 670                         p7 = d2i_PKCS7_bio(in, NULL);
 671                 else
 672                         {
 673                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
 674                         goto end;
 675                         }
 676
 677                 if (!p7)
 678                         {
 679                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 680                         goto end;
 681                         }
 682                 if (contfile)
 683                         {
 684                         BIO_free(indata);
 685                         if (!(indata = BIO_new_file(contfile, "rb")))
 686                                 {
 687                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 688                                 goto end;
 689                                 }
 690                         }
 691                 }
 692
 693         if (!p7)
 694                 {
 695                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
 696                 goto end;
 697                 }
 698
 699         ret = 4;
 700         if (operation == SMIME_DECRYPT)
 701                 {
 702                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
 703                         {
 704                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
 705                         goto end;
 706                         }
 707                 }
 708         else if (operation == SMIME_VERIFY)
 709                 {
 710                 STACK_OF(X509) *signers;
 711                 if (PKCS7_verify(p7, other, store, indata, out, flags))
 712                         BIO_printf(bio_err, "Verification successful\n");
 713                 else
 714                         {
 715                         BIO_printf(bio_err, "Verification failure\n");
 716                         goto end;
 717                         }
 718                 signers = PKCS7_get0_signers(p7, other, flags);
 719                 if (!save_certs(signerfile, signers))
 720                         {
 721                         BIO_printf(bio_err, "Error writing signers to %s\n",
 722                                                                 signerfile);
 723                         ret = 5;
 724                         goto end;
 725                         }
 726                 sk_X509_free(signers);
 727                 }
 728         else if (operation == SMIME_PK7OUT)
 729                 PEM_write_bio_PKCS7(out, p7);
 730         else
 731                 {
 732                 if (to)
 733                         BIO_printf(out, "To: %s\n", to);
 734                 if (from)
 735                         BIO_printf(out, "From: %s\n", from);
 736                 if (subject)
 737                         BIO_printf(out, "Subject: %s\n", subject);
 738                 if (outformat == FORMAT_SMIME)
 739                         SMIME_write_PKCS7(out, p7, in, flags);
 740                 else if (outformat == FORMAT_PEM)
 741                         PEM_write_bio_PKCS7(out,p7);
 742                 else if (outformat == FORMAT_ASN1)
 743                         i2d_PKCS7_bio(out,p7);
 744                 else
 745                         {
 746                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
 747                         goto end;
 748                         }
 749                 }
 750         ret = 0;
 751 end:
 752         if (need_rand)
 753                 app_RAND_write_file(NULL, bio_err);
 754         if (ret) ERR_print_errors(bio_err);
 755         sk_X509_pop_free(encerts, X509_free);
 756         sk_X509_pop_free(other, X509_free);
 757         if (vpm)
 758                 X509_VERIFY_PARAM_free(vpm);
 759         if (sksigners)
 760                 sk_free(sksigners);
 761         if (skkeys)
 762                 sk_free(skkeys);
 763         X509_STORE_free(store);
 764         X509_free(cert);
 765         X509_free(recip);
 766         X509_free(signer);
 767         EVP_PKEY_free(key);
 768         PKCS7_free(p7);
 769         BIO_free(in);
 770         BIO_free(indata);
 771         BIO_free_all(out);
 772         if (passin) OPENSSL_free(passin);
 773         return (ret);
 774 }
 775
 776 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 777         {
 778         int i;
 779         BIO *tmp;
 780         if (!signerfile)
 781                 return 1;
 782         tmp = BIO_new_file(signerfile, "w");
 783         if (!tmp) return 0;
 784         for(i = 0; i < sk_X509_num(signers); i++)
 785                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 786         BIO_free(tmp);
 787         return 1;
 788         }
 789
 790
 791 /* Minimal callback just to output policy info (if any) */
 792
 793 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 794         {
 795         int error;
 796
 797         error = X509_STORE_CTX_get_error(ctx);
 798
 799         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 800                 && ((error != X509_V_OK) || (ok != 2)))
 801                 return ok;
 802
 803         policies_print(NULL, ctx);
 804
 805         return ok;
 806
 807         }