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 #define SMIME_ENCRYPTED_DECRYPT (13 | SMIME_IP)
  90 #define SMIME_ENCRYPTED_ENCRYPT (14 | SMIME_OP)
  91
  92 int MAIN(int, char **);
  93
  94 int MAIN(int argc, char **argv)
  95         {
  96         ENGINE *e = NULL;
  97         int operation = 0;
  98         int ret = 0;
  99         char **args;
 100         const char *inmode = "r", *outmode = "w";
 101         char *infile = NULL, *outfile = NULL;
 102         char *signerfile = NULL, *recipfile = NULL;
 103         STACK *sksigners = NULL, *skkeys = NULL;
 104         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
 105         const EVP_CIPHER *cipher = NULL;
 106         CMS_ContentInfo *cms = NULL;
 107         X509_STORE *store = NULL;
 108         X509 *cert = NULL, *recip = NULL, *signer = NULL;
 109         EVP_PKEY *key = NULL;
 110         STACK_OF(X509) *encerts = NULL, *other = NULL;
 111         BIO *in = NULL, *out = NULL, *indata = NULL;
 112         int badarg = 0;
 113         int flags = CMS_DETACHED;
 114         char *to = NULL, *from = NULL, *subject = NULL;
 115         char *CAfile = NULL, *CApath = NULL;
 116         char *passargin = NULL, *passin = NULL;
 117         char *inrand = NULL;
 118         int need_rand = 0;
 119         const EVP_MD *sign_md = NULL;
 120         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
 121         int keyform = FORMAT_PEM;
 122 #ifndef OPENSSL_NO_ENGINE
 123         char *engine=NULL;
 124 #endif
 125         unsigned char *secret_key = NULL;
 126         size_t secret_keylen = 0;
 127
 128         X509_VERIFY_PARAM *vpm = NULL;
 129
 130         args = argv + 1;
 131         ret = 1;
 132
 133         apps_startup();
 134
 135         if (bio_err == NULL)
 136                 {
 137                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 138                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
 139                 }
 140
 141         if (!load_config(bio_err, NULL))
 142                 goto end;
 143
 144         while (!badarg && *args && *args[0] == '-')
 145                 {
 146                 if (!strcmp (*args, "-encrypt"))
 147                         operation = SMIME_ENCRYPT;
 148                 else if (!strcmp (*args, "-decrypt"))
 149                         operation = SMIME_DECRYPT;
 150                 else if (!strcmp (*args, "-sign"))
 151                         operation = SMIME_SIGN;
 152                 else if (!strcmp (*args, "-resign"))
 153                         operation = SMIME_RESIGN;
 154                 else if (!strcmp (*args, "-verify"))
 155                         operation = SMIME_VERIFY;
 156                 else if (!strcmp (*args, "-cmsout"))
 157                         operation = SMIME_CMSOUT;
 158                 else if (!strcmp (*args, "-data_out"))
 159                         operation = SMIME_DATAOUT;
 160                 else if (!strcmp (*args, "-data_create"))
 161                         operation = SMIME_DATA_CREATE;
 162                 else if (!strcmp (*args, "-digest_verify"))
 163                         operation = SMIME_DIGEST_VERIFY;
 164                 else if (!strcmp (*args, "-digest_create"))
 165                         operation = SMIME_DIGEST_CREATE;
 166                 else if (!strcmp (*args, "-compress"))
 167                         operation = SMIME_COMPRESS;
 168                 else if (!strcmp (*args, "-uncompress"))
 169                         operation = SMIME_UNCOMPRESS;
 170                 else if (!strcmp (*args, "-EncryptedData_decrypt"))
 171                         operation = SMIME_ENCRYPTED_DECRYPT;
 172                 else if (!strcmp (*args, "-EncryptedData_encrypt"))
 173                         operation = SMIME_ENCRYPTED_ENCRYPT;
 174 #ifndef OPENSSL_NO_DES
 175                 else if (!strcmp (*args, "-des3"))
 176                                 cipher = EVP_des_ede3_cbc();
 177                 else if (!strcmp (*args, "-des"))
 178                                 cipher = EVP_des_cbc();
 179 #endif
 180 #ifndef OPENSSL_NO_SEED
 181                 else if (!strcmp (*args, "-seed"))
 182                                 cipher = EVP_seed_cbc();
 183 #endif
 184 #ifndef OPENSSL_NO_RC2
 185                 else if (!strcmp (*args, "-rc2-40"))
 186                                 cipher = EVP_rc2_40_cbc();
 187                 else if (!strcmp (*args, "-rc2-128"))
 188                                 cipher = EVP_rc2_cbc();
 189                 else if (!strcmp (*args, "-rc2-64"))
 190                                 cipher = EVP_rc2_64_cbc();
 191 #endif
 192 #ifndef OPENSSL_NO_AES
 193                 else if (!strcmp(*args,"-aes128"))
 194                                 cipher = EVP_aes_128_cbc();
 195                 else if (!strcmp(*args,"-aes192"))
 196                                 cipher = EVP_aes_192_cbc();
 197                 else if (!strcmp(*args,"-aes256"))
 198                                 cipher = EVP_aes_256_cbc();
 199 #endif
 200 #ifndef OPENSSL_NO_CAMELLIA
 201                 else if (!strcmp(*args,"-camellia128"))
 202                                 cipher = EVP_camellia_128_cbc();
 203                 else if (!strcmp(*args,"-camellia192"))
 204                                 cipher = EVP_camellia_192_cbc();
 205                 else if (!strcmp(*args,"-camellia256"))
 206                                 cipher = EVP_camellia_256_cbc();
 207 #endif
 208                 else if (!strcmp (*args, "-text"))
 209                                 flags |= CMS_TEXT;
 210                 else if (!strcmp (*args, "-nointern"))
 211                                 flags |= CMS_NOINTERN;
 212                 else if (!strcmp (*args, "-noverify")
 213                         || !strcmp (*args, "-no_signer_cert_verify"))
 214                                 flags |= CMS_NO_SIGNER_CERT_VERIFY;
 215                 else if (!strcmp (*args, "-nocerts"))
 216                                 flags |= CMS_NOCERTS;
 217                 else if (!strcmp (*args, "-noattr"))
 218                                 flags |= CMS_NOATTR;
 219                 else if (!strcmp (*args, "-nodetach"))
 220                                 flags &= ~CMS_DETACHED;
 221                 else if (!strcmp (*args, "-nosmimecap"))
 222                                 flags |= CMS_NOSMIMECAP;
 223                 else if (!strcmp (*args, "-binary"))
 224                                 flags |= CMS_BINARY;
 225                 else if (!strcmp (*args, "-keyid"))
 226                                 flags |= CMS_USE_KEYID;
 227                 else if (!strcmp (*args, "-nosigs"))
 228                                 flags |= CMS_NOSIGS;
 229                 else if (!strcmp (*args, "-no_content_verify"))
 230                                 flags |= CMS_NO_CONTENT_VERIFY;
 231                 else if (!strcmp (*args, "-no_attr_verify"))
 232                                 flags |= CMS_NO_ATTR_VERIFY;
 233                 else if (!strcmp (*args, "-stream"))
 234                                 flags |= CMS_STREAM;
 235                 else if (!strcmp (*args, "-indef"))
 236                                 flags |= CMS_STREAM;
 237                 else if (!strcmp (*args, "-noindef"))
 238                                 flags &= ~CMS_STREAM;
 239                 else if (!strcmp (*args, "-nooldmime"))
 240                                 flags |= CMS_NOOLDMIMETYPE;
 241                 else if (!strcmp (*args, "-crlfeol"))
 242                                 flags |= CMS_CRLFEOL;
 243                 else if (!strcmp(*args,"-secretkey"))
 244                         {
 245                         long ltmp;
 246                         if (!args[1])
 247                                 goto argerr;
 248                         args++;
 249                         secret_key = string_to_hex(*args, &ltmp);
 250                         if (!secret_key)
 251                                 {
 252                                 BIO_printf(bio_err, "Invalid key %s\n", *args);
 253                                 goto argerr;
 254                                 }
 255                         secret_keylen = (size_t)ltmp;
 256                         }
 257                 else if (!strcmp(*args,"-rand"))
 258                         {
 259                         if (!args[1])
 260                                 goto argerr;
 261                         args++;
 262                         inrand = *args;
 263                         need_rand = 1;
 264                         }
 265 #ifndef OPENSSL_NO_ENGINE
 266                 else if (!strcmp(*args,"-engine"))
 267                         {
 268                         if (!args[1])
 269                                 goto argerr;
 270                         engine = *++args;
 271                         }
 272 #endif
 273                 else if (!strcmp(*args,"-passin"))
 274                         {
 275                         if (!args[1])
 276                                 goto argerr;
 277                         passargin = *++args;
 278                         }
 279                 else if (!strcmp (*args, "-to"))
 280                         {
 281                         if (!args[1])
 282                                 goto argerr;
 283                         to = *++args;
 284                         }
 285                 else if (!strcmp (*args, "-from"))
 286                         {
 287                         if (!args[1])
 288                                 goto argerr;
 289                         from = *++args;
 290                         }
 291                 else if (!strcmp (*args, "-subject"))
 292                         {
 293                         if (!args[1])
 294                                 goto argerr;
 295                         subject = *++args;
 296                         }
 297                 else if (!strcmp (*args, "-signer"))
 298                         {
 299                         if (!args[1])
 300                                 goto argerr;
 301                         /* If previous -signer argument add signer to list */
 302
 303                         if (signerfile)
 304                                 {
 305                                 if (!sksigners)
 306                                         sksigners = sk_new_null();
 307                                 sk_push(sksigners, signerfile);
 308                                 if (!keyfile)
 309                                         keyfile = signerfile;
 310                                 if (!skkeys)
 311                                         skkeys = sk_new_null();
 312                                 sk_push(skkeys, keyfile);
 313                                 keyfile = NULL;
 314                                 }
 315                         signerfile = *++args;
 316                         }
 317                 else if (!strcmp (*args, "-recip"))
 318                         {
 319                         if (!args[1])
 320                                 goto argerr;
 321                         recipfile = *++args;
 322                         }
 323                 else if (!strcmp (*args, "-md"))
 324                         {
 325                         if (!args[1])
 326                                 goto argerr;
 327                         sign_md = EVP_get_digestbyname(*++args);
 328                         if (sign_md == NULL)
 329                                 {
 330                                 BIO_printf(bio_err, "Unknown digest %s\n",
 331                                                         *args);
 332                                 goto argerr;
 333                                 }
 334                         }
 335                 else if (!strcmp (*args, "-inkey"))
 336                         {
 337                         if (!args[1])
 338                                 goto argerr;
 339                         /* If previous -inkey arument add signer to list */
 340                         if (keyfile)
 341                                 {
 342                                 if (!signerfile)
 343                                         {
 344                                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 345                                         goto argerr;
 346                                         }
 347                                 if (!sksigners)
 348                                         sksigners = sk_new_null();
 349                                 sk_push(sksigners, signerfile);
 350                                 signerfile = NULL;
 351                                 if (!skkeys)
 352                                         skkeys = sk_new_null();
 353                                 sk_push(skkeys, keyfile);
 354                                 }
 355                         keyfile = *++args;
 356                         }
 357                 else if (!strcmp (*args, "-keyform"))
 358                         {
 359                         if (!args[1])
 360                                 goto argerr;
 361                         keyform = str2fmt(*++args);
 362                         }
 363                 else if (!strcmp (*args, "-certfile"))
 364                         {
 365                         if (!args[1])
 366                                 goto argerr;
 367                         certfile = *++args;
 368                         }
 369                 else if (!strcmp (*args, "-CAfile"))
 370                         {
 371                         if (!args[1])
 372                                 goto argerr;
 373                         CAfile = *++args;
 374                         }
 375                 else if (!strcmp (*args, "-CApath"))
 376                         {
 377                         if (!args[1])
 378                                 goto argerr;
 379                         CApath = *++args;
 380                         }
 381                 else if (!strcmp (*args, "-in"))
 382                         {
 383                         if (!args[1])
 384                                 goto argerr;
 385                         infile = *++args;
 386                         }
 387                 else if (!strcmp (*args, "-inform"))
 388                         {
 389                         if (!args[1])
 390                                 goto argerr;
 391                         informat = str2fmt(*++args);
 392                         }
 393                 else if (!strcmp (*args, "-outform"))
 394                         {
 395                         if (!args[1])
 396                                 goto argerr;
 397                         outformat = str2fmt(*++args);
 398                         }
 399                 else if (!strcmp (*args, "-out"))
 400                         {
 401                         if (!args[1])
 402                                 goto argerr;
 403                         outfile = *++args;
 404                         }
 405                 else if (!strcmp (*args, "-content"))
 406                         {
 407                         if (!args[1])
 408                                 goto argerr;
 409                         contfile = *++args;
 410                         }
 411                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
 412                         continue;
 413                 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
 414                         badarg = 1;
 415                 args++;
 416                 }
 417
 418         if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
 419                 {
 420                 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
 421                 goto argerr;
 422                 }
 423
 424         if (operation & SMIME_SIGNERS)
 425                 {
 426                 /* Check to see if any final signer needs to be appended */
 427                 if (keyfile && !signerfile)
 428                         {
 429                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 430                         goto argerr;
 431                         }
 432                 if (signerfile)
 433                         {
 434                         if (!sksigners)
 435                                 sksigners = sk_new_null();
 436                         sk_push(sksigners, signerfile);
 437                         if (!skkeys)
 438                                 skkeys = sk_new_null();
 439                         if (!keyfile)
 440                                 keyfile = signerfile;
 441                         sk_push(skkeys, keyfile);
 442                         }
 443                 if (!sksigners)
 444                         {
 445                         BIO_printf(bio_err, "No signer certificate specified\n");
 446                         badarg = 1;
 447                         }
 448                 signerfile = NULL;
 449                 keyfile = NULL;
 450                 need_rand = 1;
 451                 }
 452         else if (operation == SMIME_DECRYPT)
 453                 {
 454                 if (!recipfile && !keyfile)
 455                         {
 456                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
 457                         badarg = 1;
 458                         }
 459                 }
 460         else if (operation == SMIME_ENCRYPT)
 461                 {
 462                 if (!*args)
 463                         {
 464                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 465                         badarg = 1;
 466                         }
 467                 need_rand = 1;
 468                 }
 469         else if (!operation)
 470                 badarg = 1;
 471
 472         if (badarg)
 473                 {
 474                 argerr:
 475                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 476                 BIO_printf (bio_err, "where options are\n");
 477                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 478                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 479                 BIO_printf (bio_err, "-sign          sign message\n");
 480                 BIO_printf (bio_err, "-verify        verify signed message\n");
 481                 BIO_printf (bio_err, "-cmsout        output CMS structure\n");
 482 #ifndef OPENSSL_NO_DES
 483                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 484                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 485 #endif
 486 #ifndef OPENSSL_NO_SEED
 487                 BIO_printf (bio_err, "-seed          encrypt with SEED\n");
 488 #endif
 489 #ifndef OPENSSL_NO_RC2
 490                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 491                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 492                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 493 #endif
 494 #ifndef OPENSSL_NO_AES
 495                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 496                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 497 #endif
 498 #ifndef OPENSSL_NO_CAMELLIA
 499                 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
 500                 BIO_printf (bio_err, "               encrypt PEM output with cbc camellia\n");
 501 #endif
 502                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 503                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 504                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 505                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 506                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 507                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 508                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 509                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 510                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 511                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 512                 BIO_printf (bio_err, "-skeyid        use subject key identifier\n");
 513                 BIO_printf (bio_err, "-in file       input file\n");
 514                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 515                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 516                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 517                 BIO_printf (bio_err, "-out file      output file\n");
 518                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 519                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 520                 BIO_printf (bio_err, "-to addr       to address\n");
 521                 BIO_printf (bio_err, "-from ad       from address\n");
 522                 BIO_printf (bio_err, "-subject s     subject\n");
 523                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 524                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 525                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 526                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 527                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 528 #ifndef OPENSSL_NO_ENGINE
 529                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 530 #endif
 531                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 532                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 533                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 534                 BIO_printf(bio_err,  "               the random number generator\n");
 535                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 536                 goto end;
 537                 }
 538
 539 #ifndef OPENSSL_NO_ENGINE
 540         e = setup_engine(bio_err, engine, 0);
 541 #endif
 542
 543         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
 544                 {
 545                 BIO_printf(bio_err, "Error getting password\n");
 546                 goto end;
 547                 }
 548
 549         if (need_rand)
 550                 {
 551                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 552                 if (inrand != NULL)
 553                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 554                                 app_RAND_load_files(inrand));
 555                 }
 556
 557         ret = 2;
 558
 559         if (!(operation & SMIME_SIGNERS))
 560                 flags &= ~CMS_DETACHED;
 561
 562         if (operation & SMIME_OP)
 563                 {
 564                 if (outformat == FORMAT_ASN1)
 565                         outmode = "wb";
 566                 }
 567         else
 568                 {
 569                 if (flags & CMS_BINARY)
 570                         outmode = "wb";
 571                 }
 572
 573         if (operation & SMIME_IP)
 574                 {
 575                 if (informat == FORMAT_ASN1)
 576                         inmode = "rb";
 577                 }
 578         else
 579                 {
 580                 if (flags & CMS_BINARY)
 581                         inmode = "rb";
 582                 }
 583
 584         if (operation == SMIME_ENCRYPT)
 585                 {
 586                 if (!cipher)
 587                         {
 588 #ifndef OPENSSL_NO_RC2
 589                         cipher = EVP_rc2_40_cbc();
 590 #else
 591                         BIO_printf(bio_err, "No cipher selected\n");
 592                         goto end;
 593 #endif
 594                         }
 595                 encerts = sk_X509_new_null();
 596                 while (*args)
 597                         {
 598                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 599                                 NULL, e, "recipient certificate file")))
 600                                 {
 601 #if 0                           /* An appropriate message is already printed */
 602                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 603 #endif
 604                                 goto end;
 605                                 }
 606                         sk_X509_push(encerts, cert);
 607                         cert = NULL;
 608                         args++;
 609                         }
 610                 }
 611
 612         if (certfile)
 613                 {
 614                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 615                         e, "certificate file")))
 616                         {
 617                         ERR_print_errors(bio_err);
 618                         goto end;
 619                         }
 620                 }
 621
 622         if (recipfile && (operation == SMIME_DECRYPT))
 623                 {
 624                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 625                         e, "recipient certificate file")))
 626                         {
 627                         ERR_print_errors(bio_err);
 628                         goto end;
 629                         }
 630                 }
 631
 632         if (operation == SMIME_DECRYPT)
 633                 {
 634                 if (!keyfile)
 635                         keyfile = recipfile;
 636                 }
 637         else if (operation == SMIME_SIGN)
 638                 {
 639                 if (!keyfile)
 640                         keyfile = signerfile;
 641                 }
 642         else keyfile = NULL;
 643
 644         if (keyfile)
 645                 {
 646                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 647                                "signing key file");
 648                 if (!key)
 649                         goto end;
 650                 }
 651
 652         if (infile)
 653                 {
 654                 if (!(in = BIO_new_file(infile, inmode)))
 655                         {
 656                         BIO_printf (bio_err,
 657                                  "Can't open input file %s\n", infile);
 658                         goto end;
 659                         }
 660                 }
 661         else
 662                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
 663
 664         if (operation & SMIME_IP)
 665                 {
 666                 if (informat == FORMAT_SMIME)
 667                         cms = SMIME_read_CMS(in, &indata);
 668                 else if (informat == FORMAT_PEM)
 669                         cms = PEM_read_bio_CMS(in, NULL, NULL, NULL);
 670                 else if (informat == FORMAT_ASN1)
 671                         cms = d2i_CMS_bio(in, NULL);
 672                 else
 673                         {
 674                         BIO_printf(bio_err, "Bad input format for CMS file\n");
 675                         goto end;
 676                         }
 677
 678                 if (!cms)
 679                         {
 680                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 681                         goto end;
 682                         }
 683                 if (contfile)
 684                         {
 685                         BIO_free(indata);
 686                         if (!(indata = BIO_new_file(contfile, "rb")))
 687                                 {
 688                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 689                                 goto end;
 690                                 }
 691                         }
 692                 }
 693
 694         if (outfile)
 695                 {
 696                 if (!(out = BIO_new_file(outfile, outmode)))
 697                         {
 698                         BIO_printf (bio_err,
 699                                  "Can't open output file %s\n", outfile);
 700                         goto end;
 701                         }
 702                 }
 703         else
 704                 {
 705                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 706 #ifdef OPENSSL_SYS_VMS
 707                 {
 708                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 709                     out = BIO_push(tmpbio, out);
 710                 }
 711 #endif
 712                 }
 713
 714         if (operation == SMIME_VERIFY)
 715                 {
 716                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
 717                         goto end;
 718                 X509_STORE_set_verify_cb_func(store, smime_cb);
 719                 if (vpm)
 720                         X509_STORE_set1_param(store, vpm);
 721                 }
 722
 723
 724         ret = 3;
 725
 726         if (operation == SMIME_DATA_CREATE)
 727                 {
 728                 cms = CMS_data_create(in, flags);
 729                 }
 730         else if (operation == SMIME_DIGEST_CREATE)
 731                 {
 732                 cms = CMS_digest_create(in, sign_md, flags);
 733                 }
 734         else if (operation == SMIME_COMPRESS)
 735                 {
 736                 cms = CMS_compress(in, -1, flags);
 737                 }
 738         else if (operation == SMIME_ENCRYPT)
 739                 {
 740                 cms = CMS_encrypt(encerts, in, cipher, flags);
 741                 }
 742         else if (operation == SMIME_ENCRYPTED_ENCRYPT)
 743                 {
 744                 cms = CMS_EncryptedData_encrypt(in, cipher,
 745                                                 secret_key, secret_keylen,
 746                                                 flags);
 747                 }
 748         else if (operation & SMIME_SIGNERS)
 749                 {
 750                 int i;
 751                 /* If detached data content we only enable streaming if
 752                  * S/MIME output format.
 753                  */
 754                 if (operation == SMIME_SIGN)
 755                         {
 756                         if (flags & CMS_DETACHED)
 757                                 {
 758                                 if (outformat != FORMAT_SMIME)
 759                                         flags &= ~CMS_STREAM;
 760                                 }
 761                         flags |= CMS_PARTIAL;
 762                         cms = CMS_sign(NULL, NULL, other, in, flags);
 763                         if (!cms)
 764                                 goto end;
 765                         }
 766                 else
 767                         flags |= CMS_REUSE_DIGEST;
 768                 for (i = 0; i < sk_num(sksigners); i++)
 769                         {
 770                         signerfile = sk_value(sksigners, i);
 771                         keyfile = sk_value(skkeys, i);
 772                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
 773                                         e, "signer certificate");
 774                         if (!signer)
 775                                 goto end;
 776                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 777                                "signing key file");
 778                         if (!key)
 779                                 goto end;
 780                         if (!CMS_add1_signer(cms, signer, key, sign_md, flags))
 781                                 goto end;
 782                         X509_free(signer);
 783                         signer = NULL;
 784                         EVP_PKEY_free(key);
 785                         key = NULL;
 786                         }
 787                 /* If not streaming or resigning finalize structure */
 788                 if ((operation == SMIME_SIGN) && !(flags & CMS_STREAM))
 789                         {
 790                         if (!CMS_final(cms, in, flags))
 791                                 goto end;
 792                         }
 793                 }
 794
 795         if (!cms)
 796                 {
 797                 BIO_printf(bio_err, "Error creating CMS structure\n");
 798                 goto end;
 799                 }
 800
 801         ret = 4;
 802         if (operation == SMIME_DECRYPT)
 803                 {
 804                 if (!CMS_decrypt(cms, key, recip, indata, out, flags))
 805                         {
 806                         BIO_printf(bio_err, "Error decrypting CMS structure\n");
 807                         goto end;
 808                         }
 809                 }
 810         else if (operation == SMIME_DATAOUT)
 811                 {
 812                 if (!CMS_data(cms, out, flags))
 813                         goto end;
 814                 }
 815         else if (operation == SMIME_UNCOMPRESS)
 816                 {
 817                 if (!CMS_uncompress(cms, indata, out, flags))
 818                         goto end;
 819                 }
 820         else if (operation == SMIME_DIGEST_VERIFY)
 821                 {
 822                 if (CMS_digest_verify(cms, indata, out, flags) > 0)
 823                         BIO_printf(bio_err, "Verification successful\n");
 824                 else
 825                         {
 826                         BIO_printf(bio_err, "Verification failure\n");
 827                         goto end;
 828                         }
 829                 }
 830         else if (operation == SMIME_ENCRYPTED_DECRYPT)
 831                 {
 832                 if (!CMS_EncryptedData_decrypt(cms, secret_key, secret_keylen,
 833                                                 indata, out, flags))
 834                         goto end;
 835                 }
 836         else if (operation == SMIME_VERIFY)
 837                 {
 838                 if (CMS_verify(cms, other, store, indata, out, flags) > 0)
 839                         BIO_printf(bio_err, "Verification successful\n");
 840                 else
 841                         {
 842                         BIO_printf(bio_err, "Verification failure\n");
 843                         goto end;
 844                         }
 845                 if (signerfile)
 846                         {
 847                         STACK_OF(X509) *signers;
 848                         signers = CMS_get0_signers(cms);
 849                         if (!save_certs(signerfile, signers))
 850                                 {
 851                                 BIO_printf(bio_err,
 852                                                 "Error writing signers to %s\n",
 853                                                                 signerfile);
 854                                 ret = 5;
 855                                 goto end;
 856                                 }
 857                         sk_X509_free(signers);
 858                         }
 859                 }
 860         else
 861                 {
 862                 if (outformat == FORMAT_SMIME)
 863                         {
 864                         if (to)
 865                                 BIO_printf(out, "To: %s\n", to);
 866                         if (from)
 867                                 BIO_printf(out, "From: %s\n", from);
 868                         if (subject)
 869                                 BIO_printf(out, "Subject: %s\n", subject);
 870                         if (operation == SMIME_RESIGN)
 871                                 ret = SMIME_write_CMS(out, cms, indata, flags);
 872                         else
 873                                 ret = SMIME_write_CMS(out, cms, in, flags);
 874                         }
 875                 else if (outformat == FORMAT_PEM)
 876                         ret = PEM_write_bio_CMS_stream(out, cms, in, flags);
 877                 else if (outformat == FORMAT_ASN1)
 878                         ret = i2d_CMS_bio_stream(out,cms, in, flags);
 879                 else
 880                         {
 881                         BIO_printf(bio_err, "Bad output format for CMS file\n");
 882                         goto end;
 883                         }
 884                 if (ret <= 0)
 885                         {
 886                         ret = 6;
 887                         goto end;
 888                         }
 889                 }
 890         ret = 0;
 891 end:
 892         if (ret)
 893                 ERR_print_errors(bio_err);
 894         if (need_rand)
 895                 app_RAND_write_file(NULL, bio_err);
 896         sk_X509_pop_free(encerts, X509_free);
 897         sk_X509_pop_free(other, X509_free);
 898         if (vpm)
 899                 X509_VERIFY_PARAM_free(vpm);
 900         if (sksigners)
 901                 sk_free(sksigners);
 902         if (skkeys)
 903                 sk_free(skkeys);
 904         if (secret_key)
 905                 OPENSSL_free(secret_key);
 906         X509_STORE_free(store);
 907         X509_free(cert);
 908         X509_free(recip);
 909         X509_free(signer);
 910         EVP_PKEY_free(key);
 911         CMS_ContentInfo_free(cms);
 912         BIO_free(in);
 913         BIO_free(indata);
 914         BIO_free_all(out);
 915         if (passin) OPENSSL_free(passin);
 916         return (ret);
 917 }
 918
 919 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 920         {
 921         int i;
 922         BIO *tmp;
 923         if (!signerfile)
 924                 return 1;
 925         tmp = BIO_new_file(signerfile, "w");
 926         if (!tmp) return 0;
 927         for(i = 0; i < sk_X509_num(signers); i++)
 928                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 929         BIO_free(tmp);
 930         return 1;
 931         }
 932
 933
 934 /* Minimal callback just to output policy info (if any) */
 935
 936 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 937         {
 938         int error;
 939
 940         error = X509_STORE_CTX_get_error(ctx);
 941
 942         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 943                 && ((error != X509_V_OK) || (ok != 2)))
 944                 return ok;
 945
 946         policies_print(NULL, ctx);
 947
 948         return ok;
 949
 950         }
 951
 952 #endif