apps/smime.c

   1 /* smime.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 /* S/MIME utility function */
  60
  61 #include <stdio.h>
  62 #include <string.h>
  63 #include "apps.h"
  64 #include <openssl/crypto.h>
  65 #include <openssl/pem.h>
  66 #include <openssl/err.h>
  67 #include <openssl/x509_vfy.h>
  68 #include <openssl/x509v3.h>
  69
  70 #undef PROG
  71 #define PROG smime_main
  72 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
  73 static int smime_cb(int ok, X509_STORE_CTX *ctx);
  74
  75 #define SMIME_OP        0x10
  76 #define SMIME_ENCRYPT   (1 | SMIME_OP)
  77 #define SMIME_DECRYPT   2
  78 #define SMIME_SIGN      (3 | SMIME_OP)
  79 #define SMIME_VERIFY    4
  80 #define SMIME_PK7OUT    5
  81
  82 int MAIN(int, char **);
  83
  84 int MAIN(int argc, char **argv)
  85 {
  86         ENGINE *e = NULL;
  87         int operation = 0;
  88         int ret = 0;
  89         char **args;
  90         char *inmode = "r", *outmode = "w";
  91         char *infile = NULL, *outfile = NULL;
  92         char *signerfile = NULL, *recipfile = NULL;
  93         char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
  94         const EVP_CIPHER *cipher = NULL;
  95         PKCS7 *p7 = NULL;
  96         X509_STORE *store = NULL;
  97         X509 *cert = NULL, *recip = NULL, *signer = NULL;
  98         EVP_PKEY *key = NULL;
  99         STACK_OF(X509) *encerts = NULL, *other = NULL;
 100         BIO *in = NULL, *out = NULL, *indata = NULL;
 101         int badarg = 0;
 102         int flags = PKCS7_DETACHED;
 103         char *to = NULL, *from = NULL, *subject = NULL;
 104         char *CAfile = NULL, *CApath = NULL;
 105         char *passargin = NULL, *passin = NULL;
 106         char *inrand = NULL;
 107         int need_rand = 0;
 108         int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
 109         int keyform = FORMAT_PEM;
 110 #ifndef OPENSSL_NO_ENGINE
 111         char *engine=NULL;
 112 #endif
 113
 114         X509_VERIFY_PARAM *vpm = NULL;
 115
 116         args = argv + 1;
 117         ret = 1;
 118
 119         apps_startup();
 120
 121         if (bio_err == NULL)
 122                 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 123                         BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
 124
 125         if (!load_config(bio_err, NULL))
 126                 goto end;
 127
 128         while (!badarg && *args && *args[0] == '-') {
 129                 if (!strcmp (*args, "-encrypt")) operation = SMIME_ENCRYPT;
 130                 else if (!strcmp (*args, "-decrypt")) operation = SMIME_DECRYPT;
 131                 else if (!strcmp (*args, "-sign")) operation = SMIME_SIGN;
 132                 else if (!strcmp (*args, "-verify")) operation = SMIME_VERIFY;
 133                 else if (!strcmp (*args, "-pk7out")) operation = SMIME_PK7OUT;
 134 #ifndef OPENSSL_NO_DES
 135                 else if (!strcmp (*args, "-des3"))
 136                                 cipher = EVP_des_ede3_cbc();
 137                 else if (!strcmp (*args, "-des"))
 138                                 cipher = EVP_des_cbc();
 139 #endif
 140 #ifndef OPENSSL_NO_RC2
 141                 else if (!strcmp (*args, "-rc2-40"))
 142                                 cipher = EVP_rc2_40_cbc();
 143                 else if (!strcmp (*args, "-rc2-128"))
 144                                 cipher = EVP_rc2_cbc();
 145                 else if (!strcmp (*args, "-rc2-64"))
 146                                 cipher = EVP_rc2_64_cbc();
 147 #endif
 148 #ifndef OPENSSL_NO_AES
 149                 else if (!strcmp(*args,"-aes128"))
 150                                 cipher = EVP_aes_128_cbc();
 151                 else if (!strcmp(*args,"-aes192"))
 152                                 cipher = EVP_aes_192_cbc();
 153                 else if (!strcmp(*args,"-aes256"))
 154                                 cipher = EVP_aes_256_cbc();
 155 #endif
 156                 else if (!strcmp (*args, "-text"))
 157                                 flags |= PKCS7_TEXT;
 158                 else if (!strcmp (*args, "-nointern"))
 159                                 flags |= PKCS7_NOINTERN;
 160                 else if (!strcmp (*args, "-noverify"))
 161                                 flags |= PKCS7_NOVERIFY;
 162                 else if (!strcmp (*args, "-nochain"))
 163                                 flags |= PKCS7_NOCHAIN;
 164                 else if (!strcmp (*args, "-nocerts"))
 165                                 flags |= PKCS7_NOCERTS;
 166                 else if (!strcmp (*args, "-noattr"))
 167                                 flags |= PKCS7_NOATTR;
 168                 else if (!strcmp (*args, "-nodetach"))
 169                                 flags &= ~PKCS7_DETACHED;
 170                 else if (!strcmp (*args, "-nosmimecap"))
 171                                 flags |= PKCS7_NOSMIMECAP;
 172                 else if (!strcmp (*args, "-binary"))
 173                                 flags |= PKCS7_BINARY;
 174                 else if (!strcmp (*args, "-nosigs"))
 175                                 flags |= PKCS7_NOSIGS;
 176                 else if (!strcmp (*args, "-nooldmime"))
 177                                 flags |= PKCS7_NOOLDMIMETYPE;
 178                 else if (!strcmp (*args, "-crlfeol"))
 179                                 flags |= PKCS7_CRLFEOL;
 180                 else if (!strcmp(*args,"-rand")) {
 181                         if (args[1]) {
 182                                 args++;
 183                                 inrand = *args;
 184                         } else badarg = 1;
 185                         need_rand = 1;
 186 #ifndef OPENSSL_NO_ENGINE
 187                 } else if (!strcmp(*args,"-engine")) {
 188                         if (args[1]) {
 189                                 args++;
 190                                 engine = *args;
 191                         } else badarg = 1;
 192 #endif
 193                 } else if (!strcmp(*args,"-passin")) {
 194                         if (args[1]) {
 195                                 args++;
 196                                 passargin = *args;
 197                         } else badarg = 1;
 198                 } else if (!strcmp (*args, "-to")) {
 199                         if (args[1]) {
 200                                 args++;
 201                                 to = *args;
 202                         } else badarg = 1;
 203                 } else if (!strcmp (*args, "-from")) {
 204                         if (args[1]) {
 205                                 args++;
 206                                 from = *args;
 207                         } else badarg = 1;
 208                 } else if (!strcmp (*args, "-subject")) {
 209                         if (args[1]) {
 210                                 args++;
 211                                 subject = *args;
 212                         } else badarg = 1;
 213                 } else if (!strcmp (*args, "-signer")) {
 214                         if (args[1]) {
 215                                 args++;
 216                                 signerfile = *args;
 217                         } else badarg = 1;
 218                 } else if (!strcmp (*args, "-recip")) {
 219                         if (args[1]) {
 220                                 args++;
 221                                 recipfile = *args;
 222                         } else badarg = 1;
 223                 } else if (!strcmp (*args, "-inkey")) {
 224                         if (args[1]) {
 225                                 args++;
 226                                 keyfile = *args;
 227                         } else badarg = 1;
 228                 } else if (!strcmp (*args, "-keyform")) {
 229                         if (args[1]) {
 230                                 args++;
 231                                 keyform = str2fmt(*args);
 232                         } else badarg = 1;
 233                 } else if (!strcmp (*args, "-certfile")) {
 234                         if (args[1]) {
 235                                 args++;
 236                                 certfile = *args;
 237                         } else badarg = 1;
 238                 } else if (!strcmp (*args, "-CAfile")) {
 239                         if (args[1]) {
 240                                 args++;
 241                                 CAfile = *args;
 242                         } else badarg = 1;
 243                 } else if (!strcmp (*args, "-CApath")) {
 244                         if (args[1]) {
 245                                 args++;
 246                                 CApath = *args;
 247                         } else badarg = 1;
 248                 } else if (!strcmp (*args, "-in")) {
 249                         if (args[1]) {
 250                                 args++;
 251                                 infile = *args;
 252                         } else badarg = 1;
 253                 } else if (!strcmp (*args, "-inform")) {
 254                         if (args[1]) {
 255                                 args++;
 256                                 informat = str2fmt(*args);
 257                         } else badarg = 1;
 258                 } else if (!strcmp (*args, "-outform")) {
 259                         if (args[1]) {
 260                                 args++;
 261                                 outformat = str2fmt(*args);
 262                         } else badarg = 1;
 263                 } else if (!strcmp (*args, "-out")) {
 264                         if (args[1]) {
 265                                 args++;
 266                                 outfile = *args;
 267                         } else badarg = 1;
 268                 } else if (!strcmp (*args, "-content")) {
 269                         if (args[1]) {
 270                                 args++;
 271                                 contfile = *args;
 272                         } else badarg = 1;
 273                 } else if (args_verify(&args, &badarg, bio_err, &vpm))
 274                         continue;
 275                 else
 276                         badarg = 1;
 277                 args++;
 278         }
 279
 280
 281         if(operation == SMIME_SIGN) {
 282                 if(!signerfile) {
 283                         BIO_printf(bio_err, "No signer certificate specified\n");
 284                         badarg = 1;
 285                 }
 286                 need_rand = 1;
 287         } else if(operation == SMIME_DECRYPT) {
 288                 if(!recipfile) {
 289                         BIO_printf(bio_err, "No recipient certificate and key specified\n");
 290                         badarg = 1;
 291                 }
 292         } else if(operation == SMIME_ENCRYPT) {
 293                 if(!*args) {
 294                         BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
 295                         badarg = 1;
 296                 }
 297                 need_rand = 1;
 298         } else if(!operation) badarg = 1;
 299
 300         if (badarg) {
 301                 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
 302                 BIO_printf (bio_err, "where options are\n");
 303                 BIO_printf (bio_err, "-encrypt       encrypt message\n");
 304                 BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");
 305                 BIO_printf (bio_err, "-sign          sign message\n");
 306                 BIO_printf (bio_err, "-verify        verify signed message\n");
 307                 BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");
 308 #ifndef OPENSSL_NO_DES
 309                 BIO_printf (bio_err, "-des3          encrypt with triple DES\n");
 310                 BIO_printf (bio_err, "-des           encrypt with DES\n");
 311 #endif
 312 #ifndef OPENSSL_NO_RC2
 313                 BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");
 314                 BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");
 315                 BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");
 316 #endif
 317 #ifndef OPENSSL_NO_AES
 318                 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
 319                 BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");
 320 #endif
 321                 BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");
 322                 BIO_printf (bio_err, "-nosigs        don't verify message signature\n");
 323                 BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");
 324                 BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");
 325                 BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 326                 BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 327                 BIO_printf (bio_err, "-binary        don't translate message to text\n");
 328                 BIO_printf (bio_err, "-certfile file other certificates file\n");
 329                 BIO_printf (bio_err, "-signer file   signer certificate file\n");
 330                 BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 331                 BIO_printf (bio_err, "-in file       input file\n");
 332                 BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");
 333                 BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 334                 BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");
 335                 BIO_printf (bio_err, "-out file      output file\n");
 336                 BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");
 337                 BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");
 338                 BIO_printf (bio_err, "-to addr       to address\n");
 339                 BIO_printf (bio_err, "-from ad       from address\n");
 340                 BIO_printf (bio_err, "-subject s     subject\n");
 341                 BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 342                 BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 343                 BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
 344                 BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");
 345                 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
 346 #ifndef OPENSSL_NO_ENGINE
 347                 BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");
 348 #endif
 349                 BIO_printf (bio_err, "-passin arg    input file pass phrase source\n");
 350                 BIO_printf(bio_err,  "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 351                 BIO_printf(bio_err,  "               load the file (or the files in the directory) into\n");
 352                 BIO_printf(bio_err,  "               the random number generator\n");
 353                 BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 354                 goto end;
 355         }
 356
 357 #ifndef OPENSSL_NO_ENGINE
 358         e = setup_engine(bio_err, engine, 0);
 359 #endif
 360
 361         if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
 362                 BIO_printf(bio_err, "Error getting password\n");
 363                 goto end;
 364         }
 365
 366         if (need_rand) {
 367                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 368                 if (inrand != NULL)
 369                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 370                                 app_RAND_load_files(inrand));
 371         }
 372
 373         ret = 2;
 374
 375         if(operation != SMIME_SIGN) flags &= ~PKCS7_DETACHED;
 376
 377         if(operation & SMIME_OP) {
 378                 if(flags & PKCS7_BINARY) inmode = "rb";
 379                 if(outformat == FORMAT_ASN1) outmode = "wb";
 380         } else {
 381                 if(flags & PKCS7_BINARY) outmode = "wb";
 382                 if(informat == FORMAT_ASN1) inmode = "rb";
 383         }
 384
 385         if(operation == SMIME_ENCRYPT) {
 386                 if (!cipher) {
 387 #ifndef OPENSSL_NO_RC2
 388                         cipher = EVP_rc2_40_cbc();
 389 #else
 390                         BIO_printf(bio_err, "No cipher selected\n");
 391                         goto end;
 392 #endif
 393                 }
 394                 encerts = sk_X509_new_null();
 395                 while (*args) {
 396                         if(!(cert = load_cert(bio_err,*args,FORMAT_PEM,
 397                                 NULL, e, "recipient certificate file"))) {
 398 #if 0                           /* An appropriate message is already printed */
 399                                 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
 400 #endif
 401                                 goto end;
 402                         }
 403                         sk_X509_push(encerts, cert);
 404                         cert = NULL;
 405                         args++;
 406                 }
 407         }
 408
 409         if(signerfile && (operation == SMIME_SIGN)) {
 410                 if(!(signer = load_cert(bio_err,signerfile,FORMAT_PEM, NULL,
 411                         e, "signer certificate"))) {
 412 #if 0                   /* An appropri message has already been printed */
 413                         BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
 414 #endif
 415                         goto end;
 416                 }
 417         }
 418
 419         if(certfile) {
 420                 if(!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
 421                         e, "certificate file"))) {
 422 #if 0                   /* An appropriate message has already been printed */
 423                         BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
 424 #endif
 425                         ERR_print_errors(bio_err);
 426                         goto end;
 427                 }
 428         }
 429
 430         if(recipfile && (operation == SMIME_DECRYPT)) {
 431                 if(!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
 432                         e, "recipient certificate file"))) {
 433 #if 0                   /* An appropriate message has alrady been printed */
 434                         BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
 435 #endif
 436                         ERR_print_errors(bio_err);
 437                         goto end;
 438                 }
 439         }
 440
 441         if(operation == SMIME_DECRYPT) {
 442                 if(!keyfile) keyfile = recipfile;
 443         } else if(operation == SMIME_SIGN) {
 444                 if(!keyfile) keyfile = signerfile;
 445         } else keyfile = NULL;
 446
 447         if(keyfile) {
 448                 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
 449                                "signing key file");
 450                 if (!key) {
 451                         goto end;
 452                 }
 453         }
 454
 455         if (infile) {
 456                 if (!(in = BIO_new_file(infile, inmode))) {
 457                         BIO_printf (bio_err,
 458                                  "Can't open input file %s\n", infile);
 459                         goto end;
 460                 }
 461         } else in = BIO_new_fp(stdin, BIO_NOCLOSE);
 462
 463         if (outfile) {
 464                 if (!(out = BIO_new_file(outfile, outmode))) {
 465                         BIO_printf (bio_err,
 466                                  "Can't open output file %s\n", outfile);
 467                         goto end;
 468                 }
 469         } else {
 470                 out = BIO_new_fp(stdout, BIO_NOCLOSE);
 471 #ifdef OPENSSL_SYS_VMS
 472                 {
 473                     BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 474                     out = BIO_push(tmpbio, out);
 475                 }
 476 #endif
 477         }
 478
 479         if(operation == SMIME_VERIFY) {
 480                 if(!(store = setup_verify(bio_err, CAfile, CApath))) goto end;
 481                 X509_STORE_set_verify_cb_func(store, smime_cb);
 482                 if (vpm)
 483                         X509_STORE_set1_param(store, vpm);
 484         }
 485
 486
 487         ret = 3;
 488
 489         if(operation == SMIME_ENCRYPT) {
 490                 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
 491         } else if(operation == SMIME_SIGN) {
 492                 /* If detached data and SMIME output enable partial
 493                  * signing.
 494                  */
 495                 if ((flags & PKCS7_DETACHED) && (outformat == FORMAT_SMIME))
 496                         flags |= PKCS7_STREAM;
 497                 p7 = PKCS7_sign(signer, key, other, in, flags);
 498                 /* Don't need to rewind for partial signing */
 499                 if (!(flags & PKCS7_STREAM) && (BIO_reset(in) != 0)) {
 500                   BIO_printf(bio_err, "Can't rewind input file\n");
 501                   goto end;
 502                 }
 503         } else {
 504                 if(informat == FORMAT_SMIME)
 505                         p7 = SMIME_read_PKCS7(in, &indata);
 506                 else if(informat == FORMAT_PEM)
 507                         p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
 508                 else if(informat == FORMAT_ASN1)
 509                         p7 = d2i_PKCS7_bio(in, NULL);
 510                 else {
 511                         BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
 512                         goto end;
 513                 }
 514
 515                 if(!p7) {
 516                         BIO_printf(bio_err, "Error reading S/MIME message\n");
 517                         goto end;
 518                 }
 519                 if(contfile) {
 520                         BIO_free(indata);
 521                         if(!(indata = BIO_new_file(contfile, "rb"))) {
 522                                 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
 523                                 goto end;
 524                         }
 525                 }
 526         }
 527
 528         if(!p7) {
 529                 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
 530                 goto end;
 531         }
 532
 533         ret = 4;
 534         if(operation == SMIME_DECRYPT) {
 535                 if(!PKCS7_decrypt(p7, key, recip, out, flags)) {
 536                         BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
 537                         goto end;
 538                 }
 539         } else if(operation == SMIME_VERIFY) {
 540                 STACK_OF(X509) *signers;
 541                 if(PKCS7_verify(p7, other, store, indata, out, flags)) {
 542                         BIO_printf(bio_err, "Verification successful\n");
 543                 } else {
 544                         BIO_printf(bio_err, "Verification failure\n");
 545                         goto end;
 546                 }
 547                 signers = PKCS7_get0_signers(p7, other, flags);
 548                 if(!save_certs(signerfile, signers)) {
 549                         BIO_printf(bio_err, "Error writing signers to %s\n",
 550                                                                 signerfile);
 551                         ret = 5;
 552                         goto end;
 553                 }
 554                 sk_X509_free(signers);
 555         } else if(operation == SMIME_PK7OUT) {
 556                 PEM_write_bio_PKCS7(out, p7);
 557         } else {
 558                 if(to) BIO_printf(out, "To: %s\n", to);
 559                 if(from) BIO_printf(out, "From: %s\n", from);
 560                 if(subject) BIO_printf(out, "Subject: %s\n", subject);
 561                 if(outformat == FORMAT_SMIME)
 562                         SMIME_write_PKCS7(out, p7, in, flags);
 563                 else if(outformat == FORMAT_PEM)
 564                         PEM_write_bio_PKCS7(out,p7);
 565                 else if(outformat == FORMAT_ASN1)
 566                         i2d_PKCS7_bio(out,p7);
 567                 else {
 568                         BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
 569                         goto end;
 570                 }
 571         }
 572         ret = 0;
 573 end:
 574         if (need_rand)
 575                 app_RAND_write_file(NULL, bio_err);
 576         if(ret) ERR_print_errors(bio_err);
 577         sk_X509_pop_free(encerts, X509_free);
 578         sk_X509_pop_free(other, X509_free);
 579         if (vpm)
 580                 X509_VERIFY_PARAM_free(vpm);
 581         X509_STORE_free(store);
 582         X509_free(cert);
 583         X509_free(recip);
 584         X509_free(signer);
 585         EVP_PKEY_free(key);
 586         PKCS7_free(p7);
 587         BIO_free(in);
 588         BIO_free(indata);
 589         BIO_free_all(out);
 590         if(passin) OPENSSL_free(passin);
 591         return (ret);
 592 }
 593
 594 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
 595 {
 596         int i;
 597         BIO *tmp;
 598         if(!signerfile) return 1;
 599         tmp = BIO_new_file(signerfile, "w");
 600         if(!tmp) return 0;
 601         for(i = 0; i < sk_X509_num(signers); i++)
 602                 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
 603         BIO_free(tmp);
 604         return 1;
 605 }
 606
 607
 608 static void nodes_print(BIO *out, char *name, STACK_OF(X509_POLICY_NODE) *nodes)
 609         {
 610         X509_POLICY_NODE *node;
 611         int i;
 612         BIO_printf(out, "%s Policies:", name);
 613         if (nodes)
 614                 {
 615                 BIO_puts(out, "\n");
 616                 for (i = 0; i < sk_X509_POLICY_NODE_num(nodes); i++)
 617                         {
 618                         node = sk_X509_POLICY_NODE_value(nodes, i);
 619                         X509_POLICY_NODE_print(out, node, 2);
 620                         }
 621                 }
 622         else
 623                 BIO_puts(out, " <empty>\n");
 624         }
 625
 626 static void policies_print(BIO *out, X509_STORE_CTX *ctx)
 627         {
 628         X509_POLICY_TREE *tree;
 629         int explicit;
 630         tree = X509_STORE_CTX_get0_policy_tree(ctx);
 631         explicit = X509_STORE_CTX_get_explicit_policy(ctx);
 632
 633         BIO_printf(out, "Require explicit Policy: %s\n",
 634                                 explicit ? "True" : "False");
 635
 636         nodes_print(out, "Authority", X509_policy_tree_get0_policies(tree));
 637         nodes_print(out, "User", X509_policy_tree_get0_user_policies(tree));
 638         }
 639
 640 /* Minimal callback just to output policy info (if any) */
 641
 642 static int smime_cb(int ok, X509_STORE_CTX *ctx)
 643         {
 644         BIO *out;
 645         int error;
 646
 647         error = X509_STORE_CTX_get_error(ctx);
 648
 649         if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
 650                 && ((error != X509_V_OK) || (ok != 2)))
 651                 return ok;
 652
 653         out = BIO_new_fp(stderr, BIO_NOCLOSE);
 654
 655         policies_print(out, ctx);
 656
 657         BIO_free(out);
 658
 659         return ok;
 660
 661         }