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_RC2
 157                 else if (!strcmp (*args, "-rc2-40"))
 158                                 cipher = EVP_rc2_40_cbc();
 159                 else if (!strcmp (*args, "-rc2-128"))
 160                                 cipher = EVP_rc2_cbc();
 161                 else if (!strcmp (*args, "-rc2-64"))
 162                                 cipher = EVP_rc2_64_cbc();
 163 #endif
 164 #ifndef OPENSSL_NO_AES
 165                 else if (!strcmp(*args,"-aes128"))
 166                                 cipher = EVP_aes_128_cbc();
 167                 else if (!strcmp(*args,"-aes192"))
 168                                 cipher = EVP_aes_192_cbc();
 169                 else if (!strcmp(*args,"-aes256"))
 170                                 cipher = EVP_aes_256_cbc();
 171 #endif
 172 #ifndef OPENSSL_NO_CAMELLIA
 173                 else if (!strcmp(*args,"-camellia128"))
 174                                 cipher = EVP_camellia_128_cbc();
 175                 else if (!strcmp(*args,"-camellia192"))
 176                                 cipher = EVP_camellia_192_cbc();
 177                 else if (!strcmp(*args,"-camellia256"))
 178                                 cipher = EVP_camellia_256_cbc();
 179 #endif
 180                 else if (!strcmp (*args, "-text"))
 181                                 flags |= PKCS7_TEXT;
 182                 else if (!strcmp (*args, "-nointern"))
 183                                 flags |= PKCS7_NOINTERN;
 184                 else if (!strcmp (*args, "-noverify"))
 185                                 flags |= PKCS7_NOVERIFY;
 186                 else if (!strcmp (*args, "-nochain"))
 187                                 flags |= PKCS7_NOCHAIN;
 188                 else if (!strcmp (*args, "-nocerts"))
 189                                 flags |= PKCS7_NOCERTS;
 190                 else if (!strcmp (*args, "-noattr"))
 191                                 flags |= PKCS7_NOATTR;
 192                 else if (!strcmp (*args, "-nodetach"))
 193                                 flags &= ~PKCS7_DETACHED;
 194                 else if (!strcmp (*args, "-nosmimecap"))
 195                                 flags |= PKCS7_NOSMIMECAP;
 196                 else if (!strcmp (*args, "-binary"))
 197                                 flags |= PKCS7_BINARY;
 198                 else if (!strcmp (*args, "-nosigs"))
 199                                 flags |= PKCS7_NOSIGS;
 200                 else if (!strcmp (*args, "-stream"))
 201                                 indef = 1;
 202                 else if (!strcmp (*args, "-indef"))
 203                                 indef = 1;
 204                 else if (!strcmp (*args, "-noindef"))
 205                                 indef = 0;
 206                 else if (!strcmp (*args, "-nooldmime"))
 207                                 flags |= PKCS7_NOOLDMIMETYPE;
 208                 else if (!strcmp (*args, "-crlfeol"))
 209                                 flags |= PKCS7_CRLFEOL;
 210                 else if (!strcmp(*args,"-rand"))
 211                         {
 212                         if (!args[1])
 213                                 goto argerr;
 214                         args++;
 215                         inrand = *args;
 216                         need_rand = 1;
 217                         }
 218 #ifndef OPENSSL_NO_ENGINE
 219                 else if (!strcmp(*args,"-engine"))
 220                         {
 221                         if (!args[1])
 222                                 goto argerr;
 223                         engine = *++args;
 224                         }
 225 #endif
 226                 else if (!strcmp(*args,"-passin"))
 227                         {
 228                         if (!args[1])
 229                                 goto argerr;
 230                         passargin = *++args;
 231                         }
 232                 else if (!strcmp (*args, "-to"))
 233                         {
 234                         if (!args[1])
 235                                 goto argerr;
 236                         to = *++args;
 237                         }
 238                 else if (!strcmp (*args, "-from"))
 239                         {
 240                         if (!args[1])
 241                                 goto argerr;
 242                         from = *++args;
 243                         }
 244                 else if (!strcmp (*args, "-subject"))
 245                         {
 246                         if (!args[1])
 247                                 goto argerr;
 248                         subject = *++args;
 249                         }
 250                 else if (!strcmp (*args, "-signer"))
 251                         {
 252                         if (!args[1])
 253                                 goto argerr;
 254                         /* If previous -signer argument add signer to list */
 255
 256                         if (signerfile)
 257                                 {
 258                                 if (!sksigners)
 259                                         sksigners = sk_new_null();
 260                                 sk_push(sksigners, signerfile);
 261                                 if (!keyfile)
 262                                         keyfile = signerfile;
 263                                 if (!skkeys)
 264                                         skkeys = sk_new_null();
 265                                 sk_push(skkeys, keyfile);
 266                                 keyfile = NULL;
 267                                 }
 268                         signerfile = *++args;
 269                         }
 270                 else if (!strcmp (*args, "-recip"))
 271                         {
 272                         if (!args[1])
 273                                 goto argerr;
 274                         recipfile = *++args;
 275                         }
 276                 else if (!strcmp (*args, "-md"))
 277                         {
 278                         if (!args[1])
 279                                 goto argerr;
 280                         sign_md = EVP_get_digestbyname(*++args);
 281                         if (sign_md == NULL)
 282                                 {
 283                                 BIO_printf(bio_err, "Unknown digest %s\n",
 284                                                         *args);
 285                                 goto argerr;
 286                                 }
 287                         }
 288                 else if (!strcmp (*args, "-inkey"))
 289                         {
 290                         if (!args[1])
 291                                 goto argerr;
 292                         /* If previous -inkey arument add signer to list */
 293                         if (keyfile)
 294                                 {
 295                                 if (!signerfile)
 296                                         {
 297                                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 298                                         goto argerr;
 299                                         }
 300                                 if (!sksigners)
 301                                         sksigners = sk_new_null();
 302                                 sk_push(sksigners, signerfile);
 303                                 signerfile = NULL;
 304                                 if (!skkeys)
 305                                         skkeys = sk_new_null();
 306                                 sk_push(skkeys, keyfile);
 307                                 }
 308                         keyfile = *++args;
 309                         }
 310                 else if (!strcmp (*args, "-keyform"))
 311                         {
 312                         if (!args[1])
 313                                 goto argerr;
 314                         keyform = str2fmt(*++args);
 315                         }
 316                 else if (!strcmp (*args, "-certfile"))
 317                         {
 318                         if (!args[1])
 319                                 goto argerr;
 320                         certfile = *++args;
 321                         }
 322                 else if (!strcmp (*args, "-CAfile"))
 323                         {
 324                         if (!args[1])
 325                                 goto argerr;
 326                         CAfile = *++args;
 327                         }
 328                 else if (!strcmp (*args, "-CApath"))
 329                         {
 330                         if (!args[1])
 331                                 goto argerr;
 332                         CApath = *++args;
 333                         }
 334                 else if (!strcmp (*args, "-in"))
 335                         {
 336                         if (!args[1])
 337                                 goto argerr;
 338                         infile = *++args;
 339                         }
 340                 else if (!strcmp (*args, "-inform"))
 341                         {
 342                         if (!args[1])
 343                                 goto argerr;
 344                         informat = str2fmt(*++args);
 345                         }
 346                 else if (!strcmp (*args, "-outform"))
 347                         {
 348                         if (!args[1])
 349                                 goto argerr;
 350                         outformat = str2fmt(*++args);
 351                         }
 352                 else if (!strcmp (*args, "-out"))
 353                         {
 354                         if (!args[1])
 355                                 goto argerr;
 356                         outfile = *++args;
 357                         }
 358                 else if (!strcmp (*args, "-content"))
 359                         {
 360                         if (!args[1])
 361                                 goto argerr;
 362                         contfile = *++args;
 363                         }
 364                 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
 365                         continue;
 366                 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
 367                         badarg = 1;
 368                 args++;
 369                 }
 370
 371         if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
 372                 {
 373                 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
 374                 goto argerr;
 375                 }
 376
 377         if (operation & SMIME_SIGNERS)
 378                 {
 379                 /* Check to see if any final signer needs to be appended */
 380                 if (keyfile && !signerfile)
 381                         {
 382                         BIO_puts(bio_err, "Illegal -inkey without -signer\n");
 383                         goto argerr;
 384                         }
 385                 if (signerfile)
 386                         {
 387                         if (!sksigners)
 388                                 sksigners = sk_new_null();
 389                         sk_push(sksigners, signerfile);
 390                         if (!skkeys)
 391                                 skkeys = sk_new_null();
 392                         if (!keyfile)
 393                                 keyfile = signerfile;
 394                         sk_push(skkeys, keyfile);
 395                         }
 396                 if (!sksigners)
 397                         {
 398                         BIO_printf(bio_err, "No signer certificate specified\n");
 399                         badarg = 1;
 400                         }
 401                 signerfile = NULL;
 402                 keyfile = NULL;
 403                 need_rand = 1;
 404                 }
 405         else if (operation == SMIME_DECRYPT)
 406                 {
 407                 if (!recipfile && !keyfile)
 408                         {
 409                         BIO_printf(bio_err, "No recipient certificate or key specified\n");
 410                         badarg = 1;
 411                         }
 412                 }
 413         else if (operation == SMIME_ENCRYPT)
 414                 {
 415                 if (!*args)
 416                         {
 417                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 418                         badarg = 1;
 419                         }
 420                 need_rand = 1;
 421                 }
 422         else if (!operation)
 423                 badarg = 1;
 424
 425         if (badarg)
 426                 {
 427                 argerr:
 428                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 429                 BIO_printf (bio_err, "where options are\n");
 430                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 431                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 432                 BIO_printf (bio_err, "-sign          sign message\n");
 433                 BIO_printf (bio_err, "-verify        verify signed message\n");
 434                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
 435 #ifndef OPENSSL_NO_DES
 436                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 437                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 438 #endif
 439 #ifndef OPENSSL_NO_RC2
 440                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 441                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 442                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 443 #endif
 444 #ifndef OPENSSL_NO_AES
 445                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 446                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 447 #endif
 448 #ifndef OPENSSL_NO_CAMELLIA
 449                 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
 450                 BIO_printf (bio_err, "               encrypt PEM output with cbc camellia\n");
 451 #endif
 452                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 453                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 454                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 455                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 456                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 457                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 458                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 459                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 460                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 461                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 462                 BIO_printf (bio_err, "-in file       input file\n");
 463                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 464                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 465                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 466                 BIO_printf (bio_err, "-out file      output file\n");
 467                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 468                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 469                 BIO_printf (bio_err, "-to addr       to address\n");
 470                 BIO_printf (bio_err, "-from ad       from address\n");
 471                 BIO_printf (bio_err, "-subject s     subject\n");
 472                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 473                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 474                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 475                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 476                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 477 #ifndef OPENSSL_NO_ENGINE
 478                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 479 #endif
 480                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 481                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 482                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 483                 BIO_printf(bio_err,  "               the random number generator\n");
 484                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 485                 goto end;
 486                 }
 487
 488 #ifndef OPENSSL_NO_ENGINE
 489         e = setup_engine(bio_err, engine, 0);
 490 #endif
 491
 492         if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
 493                 {
 494                 BIO_printf(bio_err, "Error getting password\n");
 495                 goto end;
 496                 }
 497
 498         if (need_rand)
 499                 {
 500                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 501                 if (inrand != NULL)
 502                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 503                                 app_RAND_load_files(inrand));
 504                 }
 505
 506         ret = 2;
 507
 508         if (!(operation & SMIME_SIGNERS))
 509                 flags &= ~PKCS7_DETACHED;
 510
 511         if (operation & SMIME_OP)
 512                 {
 513                 if (outformat == FORMAT_ASN1)
 514                         outmode = "wb";
 515                 }
 516         else
 517                 {
 518                 if (flags & PKCS7_BINARY)
 519                         outmode = "wb";
 520                 }
 521
 522         if (operation & SMIME_IP)
 523                 {
 524                 if (informat == FORMAT_ASN1)
 525                         inmode = "rb";
 526                 }
 527         else
 528                 {
 529                 if (flags & PKCS7_BINARY)
 530                         inmode = "rb";
 531                 }
 532
 533         if (operation == SMIME_ENCRYPT)
 534                 {
 535                 if (!cipher)
 536                         {
 537 #ifndef OPENSSL_NO_RC2
 538                         cipher = EVP_rc2_40_cbc();
 539 #else
 540                         BIO_printf(bio_err, "No cipher selected\n");
 541                         goto end;
 542 #endif
 543                         }
 544                 encerts = sk_X509_new_null();
 545                 while (*args)
 546                         {
 547                         if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 548                                 NULL, e, "recipient certificate file")))
 549                                 {
 550 #if 0                           /* An appropriate message is already printed */
 551                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 552 #endif
 553                                 goto end;
 554                                 }
 555                         sk_X509_push(encerts, cert);
 556                         cert = NULL;
 557                         args++;
 558                         }
 559                 }
 560
 561         if (certfile)
 562                 {
 563                 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 564                         e, "certificate file")))
 565                         {
 566                         ERR_print_errors(bio_err);
 567                         goto end;
 568                         }
 569                 }
 570
 571         if (recipfile && (operation == SMIME_DECRYPT))
 572                 {
 573                 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 574                         e, "recipient certificate file")))
 575                         {
 576                         ERR_print_errors(bio_err);
 577                         goto end;
 578                         }
 579                 }
 580
 581         if (operation == SMIME_DECRYPT)
 582                 {
 583                 if (!keyfile)
 584                         keyfile = recipfile;
 585                 }
 586         else if (operation == SMIME_SIGN)
 587                 {
 588                 if (!keyfile)
 589                         keyfile = signerfile;
 590                 }
 591         else keyfile = NULL;
 592
 593         if (keyfile)
 594                 {
 595                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 596                                "signing key file");
 597                 if (!key)
 598                         goto end;
 599                 }
 600
 601         if (infile)
 602                 {
 603                 if (!(in = BIO_new_file(infile, inmode)))
 604                         {
 605                         BIO_printf (bio_err,
 606                                  "Can't open input file %s\n", infile);
 607                         goto end;
 608                         }
 609                 }
 610         else
 611                 in = BIO_new_fp(stdin, BIO_NOCLOSE);
 612
 613         if (operation & SMIME_IP)
 614                 {
 615                 if (informat == FORMAT_SMIME)
 616                         p7 = SMIME_read_PKCS7(in, &indata);
 617                 else if (informat == FORMAT_PEM)
 618                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
 619                 else if (informat == FORMAT_ASN1)
 620                         p7 = d2i_PKCS7_bio(in, NULL);
 621                 else
 622                         {
 623                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
 624                         goto end;
 625                         }
 626
 627                 if (!p7)
 628                         {
 629                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 630                         goto end;
 631                         }
 632                 if (contfile)
 633                         {
 634                         BIO_free(indata);
 635                         if (!(indata = BIO_new_file(contfile, "rb")))
 636                                 {
 637                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 638                                 goto end;
 639                                 }
 640                         }
 641                 }
 642
 643         if (outfile)
 644                 {
 645                 if (!(out = BIO_new_file(outfile, outmode)))
 646                         {
 647                         BIO_printf (bio_err,
 648                                  "Can't open output file %s\n", outfile);
 649                         goto end;
 650                         }
 651                 }
 652         else
 653                 {
 654                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 655 #ifdef OPENSSL_SYS_VMS
 656                 {
 657                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 658                     out = BIO_push(tmpbio, out);
 659                 }
 660 #endif
 661                 }
 662
 663         if (operation == SMIME_VERIFY)
 664                 {
 665                 if (!(store = setup_verify(bio_err, CAfile, CApath)))
 666                         goto end;
 667                 X509_STORE_set_verify_cb_func(store, smime_cb);
 668                 if (vpm)
 669                         X509_STORE_set1_param(store, vpm);
 670                 }
 671
 672
 673         ret = 3;
 674
 675         if (operation == SMIME_ENCRYPT)
 676                 {
 677                 if (indef)
 678                         flags |= PKCS7_STREAM;
 679                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
 680                 }
 681         else if (operation & SMIME_SIGNERS)
 682                 {
 683                 int i;
 684                 /* If detached data and SMIME output enable partial
 685                  * signing.
 686                  */
 687                 if (operation == SMIME_SIGN)
 688                         {
 689                         if (indef || (flags & PKCS7_DETACHED))
 690                                 flags |= PKCS7_STREAM;
 691                         flags |= PKCS7_PARTIAL;
 692                         p7 = PKCS7_sign(NULL, NULL, other, in, flags);
 693                         }
 694                 else
 695                         flags |= PKCS7_REUSE_DIGEST;
 696                 for (i = 0; i < sk_num(sksigners); i++)
 697                         {
 698                         signerfile = sk_value(sksigners, i);
 699                         keyfile = sk_value(skkeys, i);
 700                         signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
 701                                         e, "signer certificate");
 702                         if (!signer)
 703                                 goto end;
 704                         key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 705                                "signing key file");
 706                         if (!key)
 707                                 goto end;
 708                         if (!PKCS7_sign_add_signer(p7, signer, key,
 709                                                 sign_md, flags))
 710                                 goto end;
 711                         X509_free(signer);
 712                         signer = NULL;
 713                         EVP_PKEY_free(key);
 714                         key = NULL;
 715                         }
 716                 /* If not streaming or resigning finalize structure */
 717                 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM))
 718                         {
 719                         if (!PKCS7_final(p7, in, flags))
 720                                 goto end;
 721                         }
 722                 }
 723
 724         if (!p7)
 725                 {
 726                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
 727                 goto end;
 728                 }
 729
 730         ret = 4;
 731         if (operation == SMIME_DECRYPT)
 732                 {
 733                 if (!PKCS7_decrypt(p7, key, recip, out, flags))
 734                         {
 735                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
 736                         goto end;
 737                         }
 738                 }
 739         else if (operation == SMIME_VERIFY)
 740                 {
 741                 STACK_OF(X509) *signers;
 742                 if (PKCS7_verify(p7, other, store, indata, out, flags))
 743                         BIO_printf(bio_err, "Verification successful\n");
 744                 else
 745                         {
 746                         BIO_printf(bio_err, "Verification failure\n");
 747                         goto end;
 748                         }
 749                 signers = PKCS7_get0_signers(p7, other, flags);
 750                 if (!save_certs(signerfile, signers))
 751                         {
 752                         BIO_printf(bio_err, "Error writing signers to %s\n",
 753                                                                 signerfile);
 754                         ret = 5;
 755                         goto end;
 756                         }
 757                 sk_X509_free(signers);
 758                 }
 759         else if (operation == SMIME_PK7OUT)
 760                 PEM_write_bio_PKCS7(out, p7);
 761         else
 762                 {
 763                 if (to)
 764                         BIO_printf(out, "To: %s\n", to);
 765                 if (from)
 766                         BIO_printf(out, "From: %s\n", from);
 767                 if (subject)
 768                         BIO_printf(out, "Subject: %s\n", subject);
 769                 if (outformat == FORMAT_SMIME)
 770                         {
 771                         if (operation == SMIME_RESIGN)
 772                                 SMIME_write_PKCS7(out, p7, indata, flags);
 773                         else
 774                                 SMIME_write_PKCS7(out, p7, in, flags);
 775                         }
 776                 else if (outformat == FORMAT_PEM)
 777                         PEM_write_bio_PKCS7_stream(out, p7, in, flags);
 778                 else if (outformat == FORMAT_ASN1)
 779                         i2d_PKCS7_bio_stream(out,p7, in, flags);
 780                 else
 781                         {
 782                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
 783                         goto end;
 784                         }
 785                 }
 786         ret = 0;
 787 end:
 788         if (need_rand)
 789                 app_RAND_write_file(NULL, bio_err);
 790         if (ret) ERR_print_errors(bio_err);
 791         sk_X509_pop_free(encerts, X509_free);
 792         sk_X509_pop_free(other, X509_free);
 793         if (vpm)
 794                 X509_VERIFY_PARAM_free(vpm);
 795         if (sksigners)
 796                 sk_free(sksigners);
 797         if (skkeys)
 798                 sk_free(skkeys);
 799         X509_STORE_free(store);
 800         X509_free(cert);
 801         X509_free(recip);
 802         X509_free(signer);
 803         EVP_PKEY_free(key);
 804         PKCS7_free(p7);
 805         BIO_free(in);
 806         BIO_free(indata);
 807         BIO_free_all(out);
 808         if (passin) OPENSSL_free(passin);
 809         return (ret);
 810 }
 811
 812 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 813         {
 814         int i;
 815         BIO *tmp;
 816         if (!signerfile)
 817                 return 1;
 818         tmp = BIO_new_file(signerfile, "w");
 819         if (!tmp) return 0;
 820         for(i = 0; i < sk_X509_num(signers); i++)
 821                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 822         BIO_free(tmp);
 823         return 1;
 824         }
 825
 826
 827 /* Minimal callback just to output policy info (if any) */
 828
 829 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 830         {
 831         int error;
 832
 833         error = X509_STORE_CTX_get_error(ctx);
 834
 835         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 836                 && ((error != X509_V_OK) || (ok != 2)))
 837                 return ok;
 838
 839         policies_print(NULL, ctx);
 840
 841         return ok;
 842
 843         }