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_IP        0x20
  77 #define SMIME_SIGNERS   0x40
  78 #define SMIME_ENCRYPT   (1 | SMIME_OP)
  79 #define SMIME_DECRYPT   (2 | SMIME_IP)
  80 #define SMIME_SIGN      (3 | SMIME_OP | SMIME_SIGNERS)
  81 #define SMIME_VERIFY    (4 | SMIME_IP)
  82 #define SMIME_PK7OUT    (5 | SMIME_IP | SMIME_OP)
  83 #define SMIME_RESIGN    (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
  84
  85 int MAIN(int, char **);
  86
  87 int MAIN(int argc, char **argv)
  88         {
  89         ENGINE *e = NULL;
  90         int operation = 0;
  91         int ret = 0;
  92         char **args;
  93         const char *inmode = "r", *outmode = "w";
  94         char *infile = NULL, *outfile = NULL;
  95         char *signerfile = NULL, *recipfile = NULL;
  96         STACK *sksigners = NULL, *skkeys = NULL;
  97         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
  98         const EVP_CIPHER *cipher = NULL;
  99         PKCS7 *p7 = NULL;
 100         X509_STORE *store = NULL;
 101         X509 *cert = NULL, *recip = NULL, *signer = NULL;
 102         EVP_PKEY *key = NULL;
 103         STACK_OF(X509) *encerts = NULL, *other = NULL;
 104         BIO *in = NULL, *out = NULL, *indata = NULL;
 105         int badarg = 0;
 106         int flags = PKCS7_DETACHED;
 107         char *to = NULL, *from = NULL, *subject = NULL;
 108         char *CAfile = NULL, *CApath = NULL;
 109         char *passargin = NULL, *passin = NULL;
 110         char *inrand = NULL;
 111         int need_rand = 0;
 112         int indef = 0;
 113         const EVP_MD *sign_md = NULL;
 114         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
 115         int keyform = FORMAT_PEM;
 116 #ifndef OPENSSL_NO_ENGINE
 117         char *engine=NULL;
 118 #endif
 119
 120         X509_VERIFY_PARAM *vpm = NULL;
 121
 122         args = argv + 1;
 123         ret = 1;
 124
 125         apps_startup();
 126
 127         if (bio_err == NULL)
 128                 {
 129                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 130                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
 131                 }
 132
 133         if (!load_config(bio_err, NULL))
 134                 goto end;
 135
 136         while (!badarg && *args && *args[0] == '-')
 137                 {
 138                 if (!strcmp (*args, "-encrypt"))
 139                         operation = SMIME_ENCRYPT;
 140                 else if (!strcmp (*args, "-decrypt"))
 141                         operation = SMIME_DECRYPT;
 142                 else if (!strcmp (*args, "-sign"))
 143                         operation = SMIME_SIGN;
 144                 else if (!strcmp (*args, "-resign"))
 145                         operation = SMIME_RESIGN;
 146                 else if (!strcmp (*args, "-verify"))
 147                         operation = SMIME_VERIFY;
 148                 else if (!strcmp (*args, "-pk7out"))
 149                         operation = SMIME_PK7OUT;
 150 #ifndef OPENSSL_NO_DES
 151                 else if (!strcmp (*args, "-des3"))
 152                                 cipher = EVP_des_ede3_cbc();
 153                 else if (!strcmp (*args, "-des"))
 154                                 cipher = EVP_des_cbc();
 155 #endif
 156 #ifndef OPENSSL_NO_SEED
 157                 else if (!strcmp (*args, "-seed"))
 158                                 cipher = EVP_seed_cbc();
 159 #endif
 160 #ifndef OPENSSL_NO_RC2
 161                 else if (!strcmp (*args, "-rc2-40"))
 162                                 cipher = EVP_rc2_40_cbc();
 163                 else if (!strcmp (*args, "-rc2-128"))
 164                                 cipher = EVP_rc2_cbc();
 165                 else if (!strcmp (*args, "-rc2-64"))
 166                                 cipher = EVP_rc2_64_cbc();
 167 #endif
 168 #ifndef OPENSSL_NO_AES
 169                 else if (!strcmp(*args,"-aes128"))
 170                                 cipher = EVP_aes_128_cbc();
 171                 else if (!strcmp(*args,"-aes192"))
 172                                 cipher = EVP_aes_192_cbc();
 173                 else if (!strcmp(*args,"-aes256"))
 174                                 cipher = EVP_aes_256_cbc();
 175 #endif
 176 #ifndef OPENSSL_NO_CAMELLIA
 177                 else if (!strcmp(*args,"-camellia128"))
 178                                 cipher = EVP_camellia_128_cbc();
 179                 else if (!strcmp(*args,"-camellia192"))
 180                                 cipher = EVP_camellia_192_cbc();
 181                 else if (!strcmp(*args,"-camellia256"))
 182                                 cipher = EVP_camellia_256_cbc();
 183 #endif
 184                 else if (!strcmp (*args, "-text"))
 185                                 flags |= PKCS7_TEXT;
 186                 else if (!strcmp (*args, "-nointern"))
 187                                 flags |= PKCS7_NOINTERN;
 188                 else if (!strcmp (*args, "-noverify"))
 189                                 flags |= PKCS7_NOVERIFY;
 190                 else if (!strcmp (*args, "-nochain"))
 191                                 flags |= PKCS7_NOCHAIN;
 192                 else if (!strcmp (*args, "-nocerts"))
 193                                 flags |= PKCS7_NOCERTS;
 194                 else if (!strcmp (*args, "-noattr"))
 195                                 flags |= PKCS7_NOATTR;
 196                 else if (!strcmp (*args, "-nodetach"))
 197                                 flags &= ~PKCS7_DETACHED;
 198                 else if (!strcmp (*args, "-nosmimecap"))
 199                                 flags |= PKCS7_NOSMIMECAP;
 200                 else if (!strcmp (*args, "-binary"))
 201                                 flags |= PKCS7_BINARY;
 202                 else if (!strcmp (*args, "-nosigs"))
 203                                 flags |= PKCS7_NOSIGS;
 204                 else if (!strcmp (*args, "-stream"))
 205                                 indef = 1;
 206                 else if (!strcmp (*args, "-indef"))
 207                                 indef = 1;
 208                 else if (!strcmp (*args, "-noindef"))
 209                                 indef = 0;
 210                 else if (!strcmp (*args, "-nooldmime"))
 211                                 flags |= PKCS7_NOOLDMIMETYPE;
 212                 else if (!strcmp (*args, "-crlfeol"))
 213                                 flags |= PKCS7_CRLFEOL;
 214                 else if (!strcmp(*args,"-rand"))
 215                         {
 216                         if (!args[1])
 217                                 goto argerr;
 218                         args++;
 219                         inrand = *args;
 220                         need_rand = 1;
 221                         }
 222 #ifndef OPENSSL_NO_ENGINE
 223                 else if (!strcmp(*args,"-engine"))
 224                         {
 225                         if (!args[1])
 226                                 goto argerr;
 227                         engine = *++args;
 228                         }
 229 #endif
 230                 else if (!strcmp(*args,"-passin"))
 231                         {
 232                         if (!args[1])
 233                                 goto argerr;
 234                         passargin = *++args;
 235                         }
 236                 else if (!strcmp (*args, "-to"))
 237                         {
 238                         if (!args[1])
 239                                 goto argerr;
 240                         to = *++args;
 241                         }
 242                 else if (!strcmp (*args, "-from"))
 243                         {
 244                         if (!args[1])
 245                                 goto argerr;
 246                         from = *++args;
 247                         }
 248                 else if (!strcmp (*args, "-subject"))
 249                         {
 250                         if (!args[1])
 251                                 goto argerr;
 252                         subject = *++args;
 253                         }
 254                 else if (!strcmp (*args, "-signer"))
 255                         {
 256                         if (!args[1])
 257                                 goto argerr;
 258                         /* If previous -signer argument add signer to list */
 259
 260                         if (signerfile)
 261                                 {
 262                                 if (!sksigners)
 263                                         sksigners = sk_new_null();
 264                                 sk_push(sksigners, signerfile);
 265                                 if (!keyfile)
 266                                         keyfile = signerfile;
 267                                 if (!skkeys)
 268                                         skkeys = sk_new_null();
 269                                 sk_push(skkeys, keyfile);
 270                                 keyfile = NULL;
 271                                 }
 272                         signerfile = *++args;
 273                         }
 274                 else if (!strcmp (*args, "-recip"))
 275                         {
 276                         if (!args[1])
 277                                 goto argerr;
 278                         recipfile = *++args;
 279                         }
 280                 else if (!strcmp (*args, "-md"))
 281                         {
 282                         if (!args[1])
 283                                 goto argerr;
 284                         sign_md = EVP_get_digestbyname(*++args);
 285                         if (sign_md == NULL)
 286                                 {
 287                                 BIO_printf(bio_err, "Unknown digest %s\n",
 288                                                         *args);
 289                                 goto argerr;
 290                                 }
 291                         }
 292                 else if (!strcmp (*args, "-inkey"))
 293                         {
 294                         if (!args[1])
 295                                 goto argerr;
 296                         /* If previous -inkey arument add signer to list */
 297                         if (keyfile)
 298                                 {
 299                                 if (!signerfile)
 300                                         {
 301                                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 302                                         goto argerr;
 303                                         }
 304                                 if (!sksigners)
 305                                         sksigners = sk_new_null();
 306                                 sk_push(sksigners, signerfile);
 307                                 signerfile = NULL;
 308                                 if (!skkeys)
 309                                         skkeys = sk_new_null();
 310                                 sk_push(skkeys, keyfile);
 311                                 }
 312                         keyfile = *++args;
 313                         }
 314                 else if (!strcmp (*args, "-keyform"))
 315                         {
 316                         if (!args[1])
 317                                 goto argerr;
 318                         keyform = str2fmt(*++args);
 319                         }
 320                 else if (!strcmp (*args, "-certfile"))
 321                         {
 322                         if (!args[1])
 323                                 goto argerr;
 324                         certfile = *++args;
 325                         }
 326                 else if (!strcmp (*args, "-CAfile"))
 327                         {
 328                         if (!args[1])
 329                                 goto argerr;
 330                         CAfile = *++args;
 331                         }
 332                 else if (!strcmp (*args, "-CApath"))
 333                         {
 334                         if (!args[1])
 335                                 goto argerr;
 336                         CApath = *++args;
 337                         }
 338                 else if (!strcmp (*args, "-in"))
 339                         {
 340                         if (!args[1])
 341                                 goto argerr;
 342                         infile = *++args;
 343                         }
 344                 else if (!strcmp (*args, "-inform"))
 345                         {
 346                         if (!args[1])
 347                                 goto argerr;
 348                         informat = str2fmt(*++args);
 349                         }
 350                 else if (!strcmp (*args, "-outform"))
 351                         {
 352                         if (!args[1])
 353                                 goto argerr;
 354                         outformat = str2fmt(*++args);
 355                         }
 356                 else if (!strcmp (*args, "-out"))
 357                         {
 358                         if (!args[1])
 359                                 goto argerr;
 360                         outfile = *++args;
 361                         }
 362                 else if (!strcmp (*args, "-content"))
 363                         {
 364                         if (!args[1])
 365                                 goto argerr;
 366                         contfile = *++args;
 367                         }
 368                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
 369                         continue;
 370                 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
 371                         badarg = 1;
 372                 args++;
 373                 }
 374
 375         if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
 376                 {
 377                 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
 378                 goto argerr;
 379                 }
 380
 381         if (operation & SMIME_SIGNERS)
 382                 {
 383                 /* Check to see if any final signer needs to be appended */
 384                 if (keyfile && !signerfile)
 385                         {
 386                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 387                         goto argerr;
 388                         }
 389                 if (signerfile)
 390                         {
 391                         if (!sksigners)
 392                                 sksigners = sk_new_null();
 393                         sk_push(sksigners, signerfile);
 394                         if (!skkeys)
 395                                 skkeys = sk_new_null();
 396                         if (!keyfile)
 397                                 keyfile = signerfile;
 398                         sk_push(skkeys, keyfile);
 399                         }
 400                 if (!sksigners)
 401                         {
 402                         BIO_printf(bio_err, "No signer certificate specified\n");
 403                         badarg = 1;
 404                         }
 405                 signerfile = NULL;
 406                 keyfile = NULL;
 407                 need_rand = 1;
 408                 }
 409         else if (operation == SMIME_DECRYPT)
 410                 {
 411                 if (!recipfile && !keyfile)
 412                         {
 413                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
 414                         badarg = 1;
 415                         }
 416                 }
 417         else if (operation == SMIME_ENCRYPT)
 418                 {
 419                 if (!*args)
 420                         {
 421                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 422                         badarg = 1;
 423                         }
 424                 need_rand = 1;
 425                 }
 426         else if (!operation)
 427                 badarg = 1;
 428
 429         if (badarg)
 430                 {
 431                 argerr:
 432                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 433                 BIO_printf (bio_err, "where options are\n");
 434                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 435                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 436                 BIO_printf (bio_err, "-sign          sign message\n");
 437                 BIO_printf (bio_err, "-verify        verify signed message\n");
 438                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
 439 #ifndef OPENSSL_NO_DES
 440                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 441                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 442 #endif
 443 #ifndef OPENSSL_NO_SEED
 444                 BIO_printf (bio_err, "-seed          encrypt with SEED\n");
 445 #endif
 446 #ifndef OPENSSL_NO_RC2
 447                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 448                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 449                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 450 #endif
 451 #ifndef OPENSSL_NO_AES
 452                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 453                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 454 #endif
 455 #ifndef OPENSSL_NO_CAMELLIA
 456                 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
 457                 BIO_printf (bio_err, "               encrypt PEM output with cbc camellia\n");
 458 #endif
 459                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 460                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 461                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 462                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 463                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 464                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 465                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 466                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 467                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 468                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 469                 BIO_printf (bio_err, "-in file       input file\n");
 470                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 471                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 472                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 473                 BIO_printf (bio_err, "-out file      output file\n");
 474                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 475                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 476                 BIO_printf (bio_err, "-to addr       to address\n");
 477                 BIO_printf (bio_err, "-from ad       from address\n");
 478                 BIO_printf (bio_err, "-subject s     subject\n");
 479                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 480                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 481                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 482                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 483                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 484 #ifndef OPENSSL_NO_ENGINE
 485                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 486 #endif
 487                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 488                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 489                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 490                 BIO_printf(bio_err,  "               the random number generator\n");
 491                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 492                 goto end;
 493                 }
 494
 495 #ifndef OPENSSL_NO_ENGINE
 496         e = setup_engine(bio_err, engine, 0);
 497 #endif
 498
 499         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
 500                 {
 501                 BIO_printf(bio_err, "Error getting password\n");
 502                 goto end;
 503                 }
 504
 505         if (need_rand)
 506                 {
 507                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 508                 if (inrand != NULL)
 509                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 510                                 app_RAND_load_files(inrand));
 511                 }
 512
 513         ret = 2;
 514
 515         if (!(operation & SMIME_SIGNERS))
 516                 flags &= ~PKCS7_DETACHED;
 517
 518         if (operation & SMIME_OP)
 519                 {
 520                 if (outformat == FORMAT_ASN1)
 521                         outmode = "wb";
 522                 }
 523         else
 524                 {
 525                 if (flags & PKCS7_BINARY)
 526                         outmode = "wb";
 527                 }
 528
 529         if (operation & SMIME_IP)
 530                 {
 531                 if (informat == FORMAT_ASN1)
 532                         inmode = "rb";
 533                 }
 534         else
 535                 {
 536                 if (flags & PKCS7_BINARY)
 537                         inmode = "rb";
 538                 }
 539
 540         if (operation == SMIME_ENCRYPT)
 541                 {
 542                 if (!cipher)
 543                         {
 544 #ifndef OPENSSL_NO_RC2
 545                         cipher = EVP_rc2_40_cbc();
 546 #else
 547                         BIO_printf(bio_err, "No cipher selected\n");
 548                         goto end;
 549 #endif
 550                         }
 551                 encerts = sk_X509_new_null();
 552                 while (*args)
 553                         {
 554                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 555                                 NULL, e, "recipient certificate file")))
 556                                 {
 557 #if 0                           /* An appropriate message is already printed */
 558                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 559 #endif
 560                                 goto end;
 561                                 }
 562                         sk_X509_push(encerts, cert);
 563                         cert = NULL;
 564                         args++;
 565                         }
 566                 }
 567
 568         if (certfile)
 569                 {
 570                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 571                         e, "certificate file")))
 572                         {
 573                         ERR_print_errors(bio_err);
 574                         goto end;
 575                         }
 576                 }
 577
 578         if (recipfile && (operation == SMIME_DECRYPT))
 579                 {
 580                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 581                         e, "recipient certificate file")))
 582                         {
 583                         ERR_print_errors(bio_err);
 584                         goto end;
 585                         }
 586                 }
 587
 588         if (operation == SMIME_DECRYPT)
 589                 {
 590                 if (!keyfile)
 591                         keyfile = recipfile;
 592                 }
 593         else if (operation == SMIME_SIGN)
 594                 {
 595                 if (!keyfile)
 596                         keyfile = signerfile;
 597                 }
 598         else keyfile = NULL;
 599
 600         if (keyfile)
 601                 {
 602                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 603                                "signing key file");
 604                 if (!key)
 605                         goto end;
 606                 }
 607
 608         if (infile)
 609                 {
 610                 if (!(in = BIO_new_file(infile, inmode)))
 611                         {
 612                         BIO_printf (bio_err,
 613                                  "Can't open input file %s\n", infile);
 614                         goto end;
 615                         }
 616                 }
 617         else
 618                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
 619
 620         if (operation & SMIME_IP)
 621                 {
 622                 if (informat == FORMAT_SMIME)
 623                         p7 = SMIME_read_PKCS7(in, &indata);
 624                 else if (informat == FORMAT_PEM)
 625                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
 626                 else if (informat == FORMAT_ASN1)
 627                         p7 = d2i_PKCS7_bio(in, NULL);
 628                 else
 629                         {
 630                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
 631                         goto end;
 632                         }
 633
 634                 if (!p7)
 635                         {
 636                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 637                         goto end;
 638                         }
 639                 if (contfile)
 640                         {
 641                         BIO_free(indata);
 642                         if (!(indata = BIO_new_file(contfile, "rb")))
 643                                 {
 644                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 645                                 goto end;
 646                                 }
 647                         }
 648                 }
 649
 650         if (outfile)
 651                 {
 652                 if (!(out = BIO_new_file(outfile, outmode)))
 653                         {
 654                         BIO_printf (bio_err,
 655                                  "Can't open output file %s\n", outfile);
 656                         goto end;
 657                         }
 658                 }
 659         else
 660                 {
 661                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 662 #ifdef OPENSSL_SYS_VMS
 663                 {
 664                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 665                     out = BIO_push(tmpbio, out);
 666                 }
 667 #endif
 668                 }
 669
 670         if (operation == SMIME_VERIFY)
 671                 {
 672                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
 673                         goto end;
 674                 X509_STORE_set_verify_cb_func(store, smime_cb);
 675                 if (vpm)
 676                         X509_STORE_set1_param(store, vpm);
 677                 }
 678
 679
 680         ret = 3;
 681
 682         if (operation == SMIME_ENCRYPT)
 683                 {
 684                 if (indef)
 685                         flags |= PKCS7_STREAM;
 686                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
 687                 }
 688         else if (operation & SMIME_SIGNERS)
 689                 {
 690                 int i;
 691                 /* If detached data and SMIME output enable partial
 692                  * signing.
 693                  */
 694                 if (operation == SMIME_SIGN)
 695                         {
 696                         if (indef || (flags & PKCS7_DETACHED))
 697                                 flags |= PKCS7_STREAM;
 698                         flags |= PKCS7_PARTIAL;
 699                         p7 = PKCS7_sign(NULL, NULL, other, in, flags);
 700                         }
 701                 else
 702                         flags |= PKCS7_REUSE_DIGEST;
 703                 for (i = 0; i < sk_num(sksigners); i++)
 704                         {
 705                         signerfile = sk_value(sksigners, i);
 706                         keyfile = sk_value(skkeys, i);
 707                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
 708                                         e, "signer certificate");
 709                         if (!signer)
 710                                 goto end;
 711                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 712                                "signing key file");
 713                         if (!key)
 714                                 goto end;
 715                         if (!PKCS7_sign_add_signer(p7, signer, key,
 716                                                 sign_md, flags))
 717                                 goto end;
 718                         X509_free(signer);
 719                         signer = NULL;
 720                         EVP_PKEY_free(key);
 721                         key = NULL;
 722                         }
 723                 /* If not streaming or resigning finalize structure */
 724                 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM))
 725                         {
 726                         if (!PKCS7_final(p7, in, flags))
 727                                 goto end;
 728                         }
 729                 }
 730
 731         if (!p7)
 732                 {
 733                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
 734                 goto end;
 735                 }
 736
 737         ret = 4;
 738         if (operation == SMIME_DECRYPT)
 739                 {
 740                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
 741                         {
 742                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
 743                         goto end;
 744                         }
 745                 }
 746         else if (operation == SMIME_VERIFY)
 747                 {
 748                 STACK_OF(X509) *signers;
 749                 if (PKCS7_verify(p7, other, store, indata, out, flags))
 750                         BIO_printf(bio_err, "Verification successful\n");
 751                 else
 752                         {
 753                         BIO_printf(bio_err, "Verification failure\n");
 754                         goto end;
 755                         }
 756                 signers = PKCS7_get0_signers(p7, other, flags);
 757                 if (!save_certs(signerfile, signers))
 758                         {
 759                         BIO_printf(bio_err, "Error writing signers to %s\n",
 760                                                                 signerfile);
 761                         ret = 5;
 762                         goto end;
 763                         }
 764                 sk_X509_free(signers);
 765                 }
 766         else if (operation == SMIME_PK7OUT)
 767                 PEM_write_bio_PKCS7(out, p7);
 768         else
 769                 {
 770                 if (to)
 771                         BIO_printf(out, "To: %s\n", to);
 772                 if (from)
 773                         BIO_printf(out, "From: %s\n", from);
 774                 if (subject)
 775                         BIO_printf(out, "Subject: %s\n", subject);
 776                 if (outformat == FORMAT_SMIME)
 777                         {
 778                         if (operation == SMIME_RESIGN)
 779                                 SMIME_write_PKCS7(out, p7, indata, flags);
 780                         else
 781                                 SMIME_write_PKCS7(out, p7, in, flags);
 782                         }
 783                 else if (outformat == FORMAT_PEM)
 784                         PEM_write_bio_PKCS7_stream(out, p7, in, flags);
 785                 else if (outformat == FORMAT_ASN1)
 786                         i2d_PKCS7_bio_stream(out,p7, in, flags);
 787                 else
 788                         {
 789                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
 790                         goto end;
 791                         }
 792                 }
 793         ret = 0;
 794 end:
 795         if (need_rand)
 796                 app_RAND_write_file(NULL, bio_err);
 797         if (ret) ERR_print_errors(bio_err);
 798         sk_X509_pop_free(encerts, X509_free);
 799         sk_X509_pop_free(other, X509_free);
 800         if (vpm)
 801                 X509_VERIFY_PARAM_free(vpm);
 802         if (sksigners)
 803                 sk_free(sksigners);
 804         if (skkeys)
 805                 sk_free(skkeys);
 806         X509_STORE_free(store);
 807         X509_free(cert);
 808         X509_free(recip);
 809         X509_free(signer);
 810         EVP_PKEY_free(key);
 811         PKCS7_free(p7);
 812         BIO_free(in);
 813         BIO_free(indata);
 814         BIO_free_all(out);
 815         if (passin) OPENSSL_free(passin);
 816         return (ret);
 817 }
 818
 819 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 820         {
 821         int i;
 822         BIO *tmp;
 823         if (!signerfile)
 824                 return 1;
 825         tmp = BIO_new_file(signerfile, "w");
 826         if (!tmp) return 0;
 827         for(i = 0; i < sk_X509_num(signers); i++)
 828                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 829         BIO_free(tmp);
 830         return 1;
 831         }
 832
 833
 834 /* Minimal callback just to output policy info (if any) */
 835
 836 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 837         {
 838         int error;
 839
 840         error = X509_STORE_CTX_get_error(ctx);
 841
 842         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 843                 && ((error != X509_V_OK) || (ok != 2)))
 844                 return ok;
 845
 846         policies_print(NULL, ctx);
 847
 848         return ok;
 849
 850         }