apps/cms.c

   1 /* apps/cms.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2008 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
  54 /* CMS utility function */
  55
  56 #include <stdio.h>
  57 #include <string.h>
  58 #include "apps.h"
  59
  60 #ifndef OPENSSL_NO_CMS
  61
  62 #include <openssl/crypto.h>
  63 #include <openssl/pem.h>
  64 #include <openssl/err.h>
  65 #include <openssl/x509_vfy.h>
  66 #include <openssl/x509v3.h>
  67 #include <openssl/cms.h>
  68
  69 #undef PROG
  70 #define PROG cms_main
  71 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
  72 static int smime_cb(int ok, X509_STORE_CTX *ctx);
  73
  74 #define SMIME_OP        0x10
  75 #define SMIME_IP        0x20
  76 #define SMIME_SIGNERS   0x40
  77 #define SMIME_ENCRYPT           (1 | SMIME_OP)
  78 #define SMIME_DECRYPT           (2 | SMIME_IP)
  79 #define SMIME_SIGN              (3 | SMIME_OP | SMIME_SIGNERS)
  80 #define SMIME_VERIFY            (4 | SMIME_IP)
  81 #define SMIME_CMSOUT            (5 | SMIME_IP | SMIME_OP)
  82 #define SMIME_RESIGN            (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
  83 #define SMIME_DATAOUT           (7 | SMIME_IP)
  84 #define SMIME_DATA_CREATE       (8 | SMIME_OP)
  85 #define SMIME_DIGEST_VERIFY     (9 | SMIME_IP)
  86 #define SMIME_DIGEST_CREATE     (10 | SMIME_OP)
  87 #define SMIME_UNCOMPRESS        (11 | SMIME_IP)
  88 #define SMIME_COMPRESS          (12 | SMIME_OP)
  89
  90 int MAIN(int, char **);
  91
  92 int MAIN(int argc, char **argv)
  93         {
  94         ENGINE *e = NULL;
  95         int operation = 0;
  96         int ret = 0;
  97         char **args;
  98         const char *inmode = "r", *outmode = "w";
  99         char *infile = NULL, *outfile = NULL;
 100         char *signerfile = NULL, *recipfile = NULL;
 101         STACK *sksigners = NULL, *skkeys = NULL;
 102         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
 103         const EVP_CIPHER *cipher = NULL;
 104         CMS_ContentInfo *cms = NULL;
 105         X509_STORE *store = NULL;
 106         X509 *cert = NULL, *recip = NULL, *signer = NULL;
 107         EVP_PKEY *key = NULL;
 108         STACK_OF(X509) *encerts = NULL, *other = NULL;
 109         BIO *in = NULL, *out = NULL, *indata = NULL;
 110         int badarg = 0;
 111         int flags = CMS_DETACHED;
 112         char *to = NULL, *from = NULL, *subject = NULL;
 113         char *CAfile = NULL, *CApath = NULL;
 114         char *passargin = NULL, *passin = NULL;
 115         char *inrand = NULL;
 116         int need_rand = 0;
 117         int indef = 0;
 118         const EVP_MD *sign_md = NULL;
 119         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
 120         int keyform = FORMAT_PEM;
 121 #ifndef OPENSSL_NO_ENGINE
 122         char *engine=NULL;
 123 #endif
 124
 125         X509_VERIFY_PARAM *vpm = NULL;
 126
 127         args = argv + 1;
 128         ret = 1;
 129
 130         apps_startup();
 131
 132         if (bio_err == NULL)
 133                 {
 134                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 135                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
 136                 }
 137
 138         if (!load_config(bio_err, NULL))
 139                 goto end;
 140
 141         while (!badarg && *args && *args[0] == '-')
 142                 {
 143                 if (!strcmp (*args, "-encrypt"))
 144                         operation = SMIME_ENCRYPT;
 145                 else if (!strcmp (*args, "-decrypt"))
 146                         operation = SMIME_DECRYPT;
 147                 else if (!strcmp (*args, "-sign"))
 148                         operation = SMIME_SIGN;
 149                 else if (!strcmp (*args, "-resign"))
 150                         operation = SMIME_RESIGN;
 151                 else if (!strcmp (*args, "-verify"))
 152                         operation = SMIME_VERIFY;
 153                 else if (!strcmp (*args, "-cmsout"))
 154                         operation = SMIME_CMSOUT;
 155                 else if (!strcmp (*args, "-data_out"))
 156                         operation = SMIME_DATAOUT;
 157                 else if (!strcmp (*args, "-data_create"))
 158                         operation = SMIME_DATA_CREATE;
 159                 else if (!strcmp (*args, "-digest_verify"))
 160                         operation = SMIME_DIGEST_VERIFY;
 161                 else if (!strcmp (*args, "-digest_create"))
 162                         operation = SMIME_DIGEST_CREATE;
 163                 else if (!strcmp (*args, "-compress"))
 164                         operation = SMIME_COMPRESS;
 165                 else if (!strcmp (*args, "-uncompress"))
 166                         operation = SMIME_UNCOMPRESS;
 167 #ifndef OPENSSL_NO_DES
 168                 else if (!strcmp (*args, "-des3"))
 169                                 cipher = EVP_des_ede3_cbc();
 170                 else if (!strcmp (*args, "-des"))
 171                                 cipher = EVP_des_cbc();
 172 #endif
 173 #ifndef OPENSSL_NO_SEED
 174                 else if (!strcmp (*args, "-seed"))
 175                                 cipher = EVP_seed_cbc();
 176 #endif
 177 #ifndef OPENSSL_NO_RC2
 178                 else if (!strcmp (*args, "-rc2-40"))
 179                                 cipher = EVP_rc2_40_cbc();
 180                 else if (!strcmp (*args, "-rc2-128"))
 181                                 cipher = EVP_rc2_cbc();
 182                 else if (!strcmp (*args, "-rc2-64"))
 183                                 cipher = EVP_rc2_64_cbc();
 184 #endif
 185 #ifndef OPENSSL_NO_AES
 186                 else if (!strcmp(*args,"-aes128"))
 187                                 cipher = EVP_aes_128_cbc();
 188                 else if (!strcmp(*args,"-aes192"))
 189                                 cipher = EVP_aes_192_cbc();
 190                 else if (!strcmp(*args,"-aes256"))
 191                                 cipher = EVP_aes_256_cbc();
 192 #endif
 193 #ifndef OPENSSL_NO_CAMELLIA
 194                 else if (!strcmp(*args,"-camellia128"))
 195                                 cipher = EVP_camellia_128_cbc();
 196                 else if (!strcmp(*args,"-camellia192"))
 197                                 cipher = EVP_camellia_192_cbc();
 198                 else if (!strcmp(*args,"-camellia256"))
 199                                 cipher = EVP_camellia_256_cbc();
 200 #endif
 201                 else if (!strcmp (*args, "-text"))
 202                                 flags |= CMS_TEXT;
 203                 else if (!strcmp (*args, "-nointern"))
 204                                 flags |= CMS_NOINTERN;
 205                 else if (!strcmp (*args, "-noverify")
 206                         || !strcmp (*args, "-no_signer_cert_verify"))
 207                                 flags |= CMS_NO_SIGNER_CERT_VERIFY;
 208                 else if (!strcmp (*args, "-nocerts"))
 209                                 flags |= CMS_NOCERTS;
 210                 else if (!strcmp (*args, "-noattr"))
 211                                 flags |= CMS_NOATTR;
 212                 else if (!strcmp (*args, "-nodetach"))
 213                                 flags &= ~CMS_DETACHED;
 214                 else if (!strcmp (*args, "-nosmimecap"))
 215                                 flags |= CMS_NOSMIMECAP;
 216                 else if (!strcmp (*args, "-binary"))
 217                                 flags |= CMS_BINARY;
 218                 else if (!strcmp (*args, "-keyid"))
 219                                 flags |= CMS_USE_KEYID;
 220                 else if (!strcmp (*args, "-nosigs"))
 221                                 flags |= CMS_NOSIGS;
 222                 else if (!strcmp (*args, "-no_content_verify"))
 223                                 flags |= CMS_NO_CONTENT_VERIFY;
 224                 else if (!strcmp (*args, "-no_attr_verify"))
 225                                 flags |= CMS_NO_ATTR_VERIFY;
 226                 else if (!strcmp (*args, "-stream"))
 227                                 indef = 1;
 228                 else if (!strcmp (*args, "-indef"))
 229                                 indef = 1;
 230                 else if (!strcmp (*args, "-noindef"))
 231                                 indef = 0;
 232                 else if (!strcmp (*args, "-nooldmime"))
 233                                 flags |= CMS_NOOLDMIMETYPE;
 234                 else if (!strcmp (*args, "-crlfeol"))
 235                                 flags |= CMS_CRLFEOL;
 236                 else if (!strcmp(*args,"-rand"))
 237                         {
 238                         if (!args[1])
 239                                 goto argerr;
 240                         args++;
 241                         inrand = *args;
 242                         need_rand = 1;
 243                         }
 244 #ifndef OPENSSL_NO_ENGINE
 245                 else if (!strcmp(*args,"-engine"))
 246                         {
 247                         if (!args[1])
 248                                 goto argerr;
 249                         engine = *++args;
 250                         }
 251 #endif
 252                 else if (!strcmp(*args,"-passin"))
 253                         {
 254                         if (!args[1])
 255                                 goto argerr;
 256                         passargin = *++args;
 257                         }
 258                 else if (!strcmp (*args, "-to"))
 259                         {
 260                         if (!args[1])
 261                                 goto argerr;
 262                         to = *++args;
 263                         }
 264                 else if (!strcmp (*args, "-from"))
 265                         {
 266                         if (!args[1])
 267                                 goto argerr;
 268                         from = *++args;
 269                         }
 270                 else if (!strcmp (*args, "-subject"))
 271                         {
 272                         if (!args[1])
 273                                 goto argerr;
 274                         subject = *++args;
 275                         }
 276                 else if (!strcmp (*args, "-signer"))
 277                         {
 278                         if (!args[1])
 279                                 goto argerr;
 280                         /* If previous -signer argument add signer to list */
 281
 282                         if (signerfile)
 283                                 {
 284                                 if (!sksigners)
 285                                         sksigners = sk_new_null();
 286                                 sk_push(sksigners, signerfile);
 287                                 if (!keyfile)
 288                                         keyfile = signerfile;
 289                                 if (!skkeys)
 290                                         skkeys = sk_new_null();
 291                                 sk_push(skkeys, keyfile);
 292                                 keyfile = NULL;
 293                                 }
 294                         signerfile = *++args;
 295                         }
 296                 else if (!strcmp (*args, "-recip"))
 297                         {
 298                         if (!args[1])
 299                                 goto argerr;
 300                         recipfile = *++args;
 301                         }
 302                 else if (!strcmp (*args, "-md"))
 303                         {
 304                         if (!args[1])
 305                                 goto argerr;
 306                         sign_md = EVP_get_digestbyname(*++args);
 307                         if (sign_md == NULL)
 308                                 {
 309                                 BIO_printf(bio_err, "Unknown digest %s\n",
 310                                                         *args);
 311                                 goto argerr;
 312                                 }
 313                         }
 314                 else if (!strcmp (*args, "-inkey"))
 315                         {
 316                         if (!args[1])
 317                                 goto argerr;
 318                         /* If previous -inkey arument add signer to list */
 319                         if (keyfile)
 320                                 {
 321                                 if (!signerfile)
 322                                         {
 323                                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 324                                         goto argerr;
 325                                         }
 326                                 if (!sksigners)
 327                                         sksigners = sk_new_null();
 328                                 sk_push(sksigners, signerfile);
 329                                 signerfile = NULL;
 330                                 if (!skkeys)
 331                                         skkeys = sk_new_null();
 332                                 sk_push(skkeys, keyfile);
 333                                 }
 334                         keyfile = *++args;
 335                         }
 336                 else if (!strcmp (*args, "-keyform"))
 337                         {
 338                         if (!args[1])
 339                                 goto argerr;
 340                         keyform = str2fmt(*++args);
 341                         }
 342                 else if (!strcmp (*args, "-certfile"))
 343                         {
 344                         if (!args[1])
 345                                 goto argerr;
 346                         certfile = *++args;
 347                         }
 348                 else if (!strcmp (*args, "-CAfile"))
 349                         {
 350                         if (!args[1])
 351                                 goto argerr;
 352                         CAfile = *++args;
 353                         }
 354                 else if (!strcmp (*args, "-CApath"))
 355                         {
 356                         if (!args[1])
 357                                 goto argerr;
 358                         CApath = *++args;
 359                         }
 360                 else if (!strcmp (*args, "-in"))
 361                         {
 362                         if (!args[1])
 363                                 goto argerr;
 364                         infile = *++args;
 365                         }
 366                 else if (!strcmp (*args, "-inform"))
 367                         {
 368                         if (!args[1])
 369                                 goto argerr;
 370                         informat = str2fmt(*++args);
 371                         }
 372                 else if (!strcmp (*args, "-outform"))
 373                         {
 374                         if (!args[1])
 375                                 goto argerr;
 376                         outformat = str2fmt(*++args);
 377                         }
 378                 else if (!strcmp (*args, "-out"))
 379                         {
 380                         if (!args[1])
 381                                 goto argerr;
 382                         outfile = *++args;
 383                         }
 384                 else if (!strcmp (*args, "-content"))
 385                         {
 386                         if (!args[1])
 387                                 goto argerr;
 388                         contfile = *++args;
 389                         }
 390                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
 391                         continue;
 392                 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
 393                         badarg = 1;
 394                 args++;
 395                 }
 396
 397         if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
 398                 {
 399                 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
 400                 goto argerr;
 401                 }
 402
 403         if (operation & SMIME_SIGNERS)
 404                 {
 405                 /* Check to see if any final signer needs to be appended */
 406                 if (keyfile && !signerfile)
 407                         {
 408                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 409                         goto argerr;
 410                         }
 411                 if (signerfile)
 412                         {
 413                         if (!sksigners)
 414                                 sksigners = sk_new_null();
 415                         sk_push(sksigners, signerfile);
 416                         if (!skkeys)
 417                                 skkeys = sk_new_null();
 418                         if (!keyfile)
 419                                 keyfile = signerfile;
 420                         sk_push(skkeys, keyfile);
 421                         }
 422                 if (!sksigners)
 423                         {
 424                         BIO_printf(bio_err, "No signer certificate specified\n");
 425                         badarg = 1;
 426                         }
 427                 signerfile = NULL;
 428                 keyfile = NULL;
 429                 need_rand = 1;
 430                 }
 431         else if (operation == SMIME_DECRYPT)
 432                 {
 433                 if (!recipfile && !keyfile)
 434                         {
 435                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
 436                         badarg = 1;
 437                         }
 438                 }
 439         else if (operation == SMIME_ENCRYPT)
 440                 {
 441                 if (!*args)
 442                         {
 443                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 444                         badarg = 1;
 445                         }
 446                 need_rand = 1;
 447                 }
 448         else if (!operation)
 449                 badarg = 1;
 450
 451         if (badarg)
 452                 {
 453                 argerr:
 454                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 455                 BIO_printf (bio_err, "where options are\n");
 456                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 457                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 458                 BIO_printf (bio_err, "-sign          sign message\n");
 459                 BIO_printf (bio_err, "-verify        verify signed message\n");
 460                 BIO_printf (bio_err, "-cmsout        output CMS structure\n");
 461 #ifndef OPENSSL_NO_DES
 462                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 463                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 464 #endif
 465 #ifndef OPENSSL_NO_SEED
 466                 BIO_printf (bio_err, "-seed          encrypt with SEED\n");
 467 #endif
 468 #ifndef OPENSSL_NO_RC2
 469                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 470                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 471                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 472 #endif
 473 #ifndef OPENSSL_NO_AES
 474                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 475                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 476 #endif
 477 #ifndef OPENSSL_NO_CAMELLIA
 478                 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
 479                 BIO_printf (bio_err, "               encrypt PEM output with cbc camellia\n");
 480 #endif
 481                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 482                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 483                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 484                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 485                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 486                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 487                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 488                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 489                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 490                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 491                 BIO_printf (bio_err, "-skeyid        use subject key identifier\n");
 492                 BIO_printf (bio_err, "-in file       input file\n");
 493                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 494                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 495                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 496                 BIO_printf (bio_err, "-out file      output file\n");
 497                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 498                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 499                 BIO_printf (bio_err, "-to addr       to address\n");
 500                 BIO_printf (bio_err, "-from ad       from address\n");
 501                 BIO_printf (bio_err, "-subject s     subject\n");
 502                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 503                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 504                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 505                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 506                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 507 #ifndef OPENSSL_NO_ENGINE
 508                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 509 #endif
 510                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 511                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 512                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 513                 BIO_printf(bio_err,  "               the random number generator\n");
 514                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 515                 goto end;
 516                 }
 517
 518 #ifndef OPENSSL_NO_ENGINE
 519         e = setup_engine(bio_err, engine, 0);
 520 #endif
 521
 522         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
 523                 {
 524                 BIO_printf(bio_err, "Error getting password\n");
 525                 goto end;
 526                 }
 527
 528         if (need_rand)
 529                 {
 530                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 531                 if (inrand != NULL)
 532                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 533                                 app_RAND_load_files(inrand));
 534                 }
 535
 536         ret = 2;
 537
 538         if (!(operation & SMIME_SIGNERS))
 539                 flags &= ~CMS_DETACHED;
 540
 541         if (operation & SMIME_OP)
 542                 {
 543                 if (outformat == FORMAT_ASN1)
 544                         outmode = "wb";
 545                 }
 546         else
 547                 {
 548                 if (flags & CMS_BINARY)
 549                         outmode = "wb";
 550                 }
 551
 552         if (operation & SMIME_IP)
 553                 {
 554                 if (informat == FORMAT_ASN1)
 555                         inmode = "rb";
 556                 }
 557         else
 558                 {
 559                 if (flags & CMS_BINARY)
 560                         inmode = "rb";
 561                 }
 562
 563         if (operation == SMIME_ENCRYPT)
 564                 {
 565                 if (!cipher)
 566                         {
 567 #ifndef OPENSSL_NO_RC2
 568                         cipher = EVP_rc2_40_cbc();
 569 #else
 570                         BIO_printf(bio_err, "No cipher selected\n");
 571                         goto end;
 572 #endif
 573                         }
 574                 encerts = sk_X509_new_null();
 575                 while (*args)
 576                         {
 577                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 578                                 NULL, e, "recipient certificate file")))
 579                                 {
 580 #if 0                           /* An appropriate message is already printed */
 581                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 582 #endif
 583                                 goto end;
 584                                 }
 585                         sk_X509_push(encerts, cert);
 586                         cert = NULL;
 587                         args++;
 588                         }
 589                 }
 590
 591         if (certfile)
 592                 {
 593                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 594                         e, "certificate file")))
 595                         {
 596                         ERR_print_errors(bio_err);
 597                         goto end;
 598                         }
 599                 }
 600
 601         if (recipfile && (operation == SMIME_DECRYPT))
 602                 {
 603                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 604                         e, "recipient certificate file")))
 605                         {
 606                         ERR_print_errors(bio_err);
 607                         goto end;
 608                         }
 609                 }
 610
 611         if (operation == SMIME_DECRYPT)
 612                 {
 613                 if (!keyfile)
 614                         keyfile = recipfile;
 615                 }
 616         else if (operation == SMIME_SIGN)
 617                 {
 618                 if (!keyfile)
 619                         keyfile = signerfile;
 620                 }
 621         else keyfile = NULL;
 622
 623         if (keyfile)
 624                 {
 625                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 626                                "signing key file");
 627                 if (!key)
 628                         goto end;
 629                 }
 630
 631         if (infile)
 632                 {
 633                 if (!(in = BIO_new_file(infile, inmode)))
 634                         {
 635                         BIO_printf (bio_err,
 636                                  "Can't open input file %s\n", infile);
 637                         goto end;
 638                         }
 639                 }
 640         else
 641                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
 642
 643         if (operation & SMIME_IP)
 644                 {
 645                 if (informat == FORMAT_SMIME)
 646                         cms = SMIME_read_CMS(in, &indata);
 647                 else if (informat == FORMAT_PEM)
 648                         cms = PEM_read_bio_CMS(in, NULL, NULL, NULL);
 649                 else if (informat == FORMAT_ASN1)
 650                         cms = d2i_CMS_bio(in, NULL);
 651                 else
 652                         {
 653                         BIO_printf(bio_err, "Bad input format for CMS file\n");
 654                         goto end;
 655                         }
 656
 657                 if (!cms)
 658                         {
 659                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 660                         goto end;
 661                         }
 662                 if (contfile)
 663                         {
 664                         BIO_free(indata);
 665                         if (!(indata = BIO_new_file(contfile, "rb")))
 666                                 {
 667                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 668                                 goto end;
 669                                 }
 670                         }
 671                 }
 672
 673         if (outfile)
 674                 {
 675                 if (!(out = BIO_new_file(outfile, outmode)))
 676                         {
 677                         BIO_printf (bio_err,
 678                                  "Can't open output file %s\n", outfile);
 679                         goto end;
 680                         }
 681                 }
 682         else
 683                 {
 684                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 685 #ifdef OPENSSL_SYS_VMS
 686                 {
 687                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 688                     out = BIO_push(tmpbio, out);
 689                 }
 690 #endif
 691                 }
 692
 693         if (operation == SMIME_VERIFY)
 694                 {
 695                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
 696                         goto end;
 697                 X509_STORE_set_verify_cb_func(store, smime_cb);
 698                 if (vpm)
 699                         X509_STORE_set1_param(store, vpm);
 700                 }
 701
 702
 703         ret = 3;
 704
 705         if (operation == SMIME_DATA_CREATE)
 706                 {
 707                 if (indef)
 708                         flags |= CMS_STREAM;
 709                 cms = CMS_data_create(in, flags);
 710                 }
 711         else if (operation == SMIME_DIGEST_CREATE)
 712                 {
 713                 if (indef)
 714                         flags |= CMS_STREAM;
 715                 cms = CMS_digest_create(in, sign_md, flags);
 716                 }
 717         else if (operation == SMIME_COMPRESS)
 718                 {
 719                 if (indef)
 720                         flags |= CMS_STREAM;
 721                 cms = CMS_compress(in, -1, flags);
 722                 }
 723         else if (operation == SMIME_ENCRYPT)
 724                 {
 725                 if (indef)
 726                         flags |= CMS_STREAM;
 727                 cms = CMS_encrypt(encerts, in, cipher, flags);
 728                 }
 729         else if (operation & SMIME_SIGNERS)
 730                 {
 731                 int i;
 732                 /* If detached data content we only enable streaming if
 733                  * S/MIME output format.
 734                  */
 735                 if (operation == SMIME_SIGN)
 736                         {
 737                         if (flags & CMS_DETACHED)
 738                                 {
 739                                 if (outformat == FORMAT_SMIME)
 740                                         flags |= CMS_STREAM;
 741                                 }
 742                         else if (indef)
 743                                 flags |= CMS_STREAM;
 744                         flags |= CMS_PARTIAL;
 745                         cms = CMS_sign(NULL, NULL, other, in, flags);
 746                         if (!cms)
 747                                 goto end;
 748                         }
 749                 else
 750                         flags |= CMS_REUSE_DIGEST;
 751                 for (i = 0; i < sk_num(sksigners); i++)
 752                         {
 753                         signerfile = sk_value(sksigners, i);
 754                         keyfile = sk_value(skkeys, i);
 755                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
 756                                         e, "signer certificate");
 757                         if (!signer)
 758                                 goto end;
 759                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 760                                "signing key file");
 761                         if (!key)
 762                                 goto end;
 763                         if (!CMS_add1_signer(cms, signer, key, sign_md, flags))
 764                                 goto end;
 765                         X509_free(signer);
 766                         signer = NULL;
 767                         EVP_PKEY_free(key);
 768                         key = NULL;
 769                         }
 770                 /* If not streaming or resigning finalize structure */
 771                 if ((operation == SMIME_SIGN) && !(flags & CMS_STREAM))
 772                         {
 773                         if (!CMS_final(cms, in, flags))
 774                                 goto end;
 775                         }
 776                 }
 777
 778         if (!cms)
 779                 {
 780                 BIO_printf(bio_err, "Error creating CMS structure\n");
 781                 goto end;
 782                 }
 783
 784         ret = 4;
 785         if (operation == SMIME_DECRYPT)
 786                 {
 787                 if (!CMS_decrypt(cms, key, recip, out, flags))
 788                         {
 789                         BIO_printf(bio_err, "Error decrypting CMS structure\n");
 790                         goto end;
 791                         }
 792                 }
 793         else if (operation == SMIME_DATAOUT)
 794                 {
 795                 if (!CMS_data(cms, out, flags))
 796                         goto end;
 797                 }
 798         else if (operation == SMIME_UNCOMPRESS)
 799                 {
 800                 if (!CMS_uncompress(cms, indata, out, flags))
 801                         goto end;
 802                 }
 803         else if (operation == SMIME_DIGEST_VERIFY)
 804                 {
 805                 if (CMS_digest_verify(cms, indata, out, flags) > 0)
 806                         BIO_printf(bio_err, "Verification successful\n");
 807                 else
 808                         {
 809                         BIO_printf(bio_err, "Verification failure\n");
 810                         goto end;
 811                         }
 812                 }
 813         else if (operation == SMIME_VERIFY)
 814                 {
 815                 if (CMS_verify(cms, other, store, indata, out, flags) > 0)
 816                         BIO_printf(bio_err, "Verification successful\n");
 817                 else
 818                         {
 819                         BIO_printf(bio_err, "Verification failure\n");
 820                         goto end;
 821                         }
 822                 if (signerfile)
 823                         {
 824                         STACK_OF(X509) *signers;
 825                         signers = CMS_get0_signers(cms);
 826                         if (!save_certs(signerfile, signers))
 827                                 {
 828                                 BIO_printf(bio_err,
 829                                                 "Error writing signers to %s\n",
 830                                                                 signerfile);
 831                                 ret = 5;
 832                                 goto end;
 833                                 }
 834                         sk_X509_free(signers);
 835                         }
 836                 }
 837         else
 838                 {
 839                 if (outformat == FORMAT_SMIME)
 840                         {
 841                         if (to)
 842                                 BIO_printf(out, "To: %s\n", to);
 843                         if (from)
 844                                 BIO_printf(out, "From: %s\n", from);
 845                         if (subject)
 846                                 BIO_printf(out, "Subject: %s\n", subject);
 847                         if (operation == SMIME_RESIGN)
 848                                 ret = SMIME_write_CMS(out, cms, indata, flags);
 849                         else
 850                                 ret = SMIME_write_CMS(out, cms, in, flags);
 851                         }
 852                 else if (outformat == FORMAT_PEM)
 853                         ret = PEM_write_bio_CMS_stream(out, cms, in, flags);
 854                 else if (outformat == FORMAT_ASN1)
 855                         ret = i2d_CMS_bio_stream(out,cms, in, flags);
 856                 else
 857                         {
 858                         BIO_printf(bio_err, "Bad output format for CMS file\n");
 859                         goto end;
 860                         }
 861                 if (ret <= 0)
 862                         {
 863                         ret = 6;
 864                         goto end;
 865                         }
 866                 }
 867         ret = 0;
 868 end:
 869         if (ret)
 870                 ERR_print_errors(bio_err);
 871         if (need_rand)
 872                 app_RAND_write_file(NULL, bio_err);
 873         sk_X509_pop_free(encerts, X509_free);
 874         sk_X509_pop_free(other, X509_free);
 875         if (vpm)
 876                 X509_VERIFY_PARAM_free(vpm);
 877         if (sksigners)
 878                 sk_free(sksigners);
 879         if (skkeys)
 880                 sk_free(skkeys);
 881         X509_STORE_free(store);
 882         X509_free(cert);
 883         X509_free(recip);
 884         X509_free(signer);
 885         EVP_PKEY_free(key);
 886         CMS_ContentInfo_free(cms);
 887         BIO_free(in);
 888         BIO_free(indata);
 889         BIO_free_all(out);
 890         if (passin) OPENSSL_free(passin);
 891         return (ret);
 892 }
 893
 894 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 895         {
 896         int i;
 897         BIO *tmp;
 898         if (!signerfile)
 899                 return 1;
 900         tmp = BIO_new_file(signerfile, "w");
 901         if (!tmp) return 0;
 902         for(i = 0; i < sk_X509_num(signers); i++)
 903                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 904         BIO_free(tmp);
 905         return 1;
 906         }
 907
 908
 909 /* Minimal callback just to output policy info (if any) */
 910
 911 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 912         {
 913         int error;
 914
 915         error = X509_STORE_CTX_get_error(ctx);
 916
 917         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 918                 && ((error != X509_V_OK) || (ok != 2)))
 919                 return ok;
 920
 921         policies_print(NULL, ctx);
 922
 923         return ok;
 924
 925         }
 926
 927 #endif