smime.c revision 312826
1/* smime.c */ 2/* 3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 4 * project. 5 */ 6/* ==================================================================== 7 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59 60/* S/MIME utility function */ 61 62#include <stdio.h> 63#include <string.h> 64#include "apps.h" 65#include <openssl/crypto.h> 66#include <openssl/pem.h> 67#include <openssl/err.h> 68#include <openssl/x509_vfy.h> 69#include <openssl/x509v3.h> 70 71#undef PROG 72#define PROG smime_main 73static int save_certs(char *signerfile, STACK_OF(X509) *signers); 74static int smime_cb(int ok, X509_STORE_CTX *ctx); 75 76#define SMIME_OP 0x10 77#define SMIME_IP 0x20 78#define SMIME_SIGNERS 0x40 79#define SMIME_ENCRYPT (1 | SMIME_OP) 80#define SMIME_DECRYPT (2 | SMIME_IP) 81#define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS) 82#define SMIME_VERIFY (4 | SMIME_IP) 83#define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP) 84#define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS) 85 86int MAIN(int, char **); 87 88int MAIN(int argc, char **argv) 89{ 90 ENGINE *e = NULL; 91 int operation = 0; 92 int ret = 0; 93 char **args; 94 const char *inmode = "r", *outmode = "w"; 95 char *infile = NULL, *outfile = NULL; 96 char *signerfile = NULL, *recipfile = NULL; 97 STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL; 98 char *certfile = NULL, *keyfile = NULL, *contfile = NULL; 99 const EVP_CIPHER *cipher = NULL; 100 PKCS7 *p7 = NULL; 101 X509_STORE *store = NULL; 102 X509 *cert = NULL, *recip = NULL, *signer = NULL; 103 EVP_PKEY *key = NULL; 104 STACK_OF(X509) *encerts = NULL, *other = NULL; 105 BIO *in = NULL, *out = NULL, *indata = NULL; 106 int badarg = 0; 107 int flags = PKCS7_DETACHED; 108 char *to = NULL, *from = NULL, *subject = NULL; 109 char *CAfile = NULL, *CApath = NULL; 110 char *passargin = NULL, *passin = NULL; 111 char *inrand = NULL; 112 int need_rand = 0; 113 int indef = 0; 114 const EVP_MD *sign_md = NULL; 115 int informat = FORMAT_SMIME, outformat = FORMAT_SMIME; 116 int keyform = FORMAT_PEM; 117 char *engine = NULL; 118 119 X509_VERIFY_PARAM *vpm = NULL; 120 121 args = argv + 1; 122 ret = 1; 123 124 apps_startup(); 125 126 if (bio_err == NULL) { 127 if ((bio_err = BIO_new(BIO_s_file())) != NULL) 128 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT); 129 } 130 131 if (!load_config(bio_err, NULL)) 132 goto end; 133 134 while (!badarg && *args && *args[0] == '-') { 135 if (!strcmp(*args, "-encrypt")) 136 operation = SMIME_ENCRYPT; 137 else if (!strcmp(*args, "-decrypt")) 138 operation = SMIME_DECRYPT; 139 else if (!strcmp(*args, "-sign")) 140 operation = SMIME_SIGN; 141 else if (!strcmp(*args, "-resign")) 142 operation = SMIME_RESIGN; 143 else if (!strcmp(*args, "-verify")) 144 operation = SMIME_VERIFY; 145 else if (!strcmp(*args, "-pk7out")) 146 operation = SMIME_PK7OUT; 147#ifndef OPENSSL_NO_DES 148 else if (!strcmp(*args, "-des3")) 149 cipher = EVP_des_ede3_cbc(); 150 else if (!strcmp(*args, "-des")) 151 cipher = EVP_des_cbc(); 152#endif 153#ifndef OPENSSL_NO_SEED 154 else if (!strcmp(*args, "-seed")) 155 cipher = EVP_seed_cbc(); 156#endif 157#ifndef OPENSSL_NO_RC2 158 else if (!strcmp(*args, "-rc2-40")) 159 cipher = EVP_rc2_40_cbc(); 160 else if (!strcmp(*args, "-rc2-128")) 161 cipher = EVP_rc2_cbc(); 162 else if (!strcmp(*args, "-rc2-64")) 163 cipher = EVP_rc2_64_cbc(); 164#endif 165#ifndef OPENSSL_NO_AES 166 else if (!strcmp(*args, "-aes128")) 167 cipher = EVP_aes_128_cbc(); 168 else if (!strcmp(*args, "-aes192")) 169 cipher = EVP_aes_192_cbc(); 170 else if (!strcmp(*args, "-aes256")) 171 cipher = EVP_aes_256_cbc(); 172#endif 173#ifndef OPENSSL_NO_CAMELLIA 174 else if (!strcmp(*args, "-camellia128")) 175 cipher = EVP_camellia_128_cbc(); 176 else if (!strcmp(*args, "-camellia192")) 177 cipher = EVP_camellia_192_cbc(); 178 else if (!strcmp(*args, "-camellia256")) 179 cipher = EVP_camellia_256_cbc(); 180#endif 181 else if (!strcmp(*args, "-text")) 182 flags |= PKCS7_TEXT; 183 else if (!strcmp(*args, "-nointern")) 184 flags |= PKCS7_NOINTERN; 185 else if (!strcmp(*args, "-noverify")) 186 flags |= PKCS7_NOVERIFY; 187 else if (!strcmp(*args, "-nochain")) 188 flags |= PKCS7_NOCHAIN; 189 else if (!strcmp(*args, "-nocerts")) 190 flags |= PKCS7_NOCERTS; 191 else if (!strcmp(*args, "-noattr")) 192 flags |= PKCS7_NOATTR; 193 else if (!strcmp(*args, "-nodetach")) 194 flags &= ~PKCS7_DETACHED; 195 else if (!strcmp(*args, "-nosmimecap")) 196 flags |= PKCS7_NOSMIMECAP; 197 else if (!strcmp(*args, "-binary")) 198 flags |= PKCS7_BINARY; 199 else if (!strcmp(*args, "-nosigs")) 200 flags |= PKCS7_NOSIGS; 201 else if (!strcmp(*args, "-stream")) 202 indef = 1; 203 else if (!strcmp(*args, "-indef")) 204 indef = 1; 205 else if (!strcmp(*args, "-noindef")) 206 indef = 0; 207 else if (!strcmp(*args, "-nooldmime")) 208 flags |= PKCS7_NOOLDMIMETYPE; 209 else if (!strcmp(*args, "-crlfeol")) 210 flags |= PKCS7_CRLFEOL; 211 else if (!strcmp(*args, "-rand")) { 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 if (!args[1]) 221 goto argerr; 222 engine = *++args; 223 } 224#endif 225 else if (!strcmp(*args, "-passin")) { 226 if (!args[1]) 227 goto argerr; 228 passargin = *++args; 229 } else if (!strcmp(*args, "-to")) { 230 if (!args[1]) 231 goto argerr; 232 to = *++args; 233 } else if (!strcmp(*args, "-from")) { 234 if (!args[1]) 235 goto argerr; 236 from = *++args; 237 } else if (!strcmp(*args, "-subject")) { 238 if (!args[1]) 239 goto argerr; 240 subject = *++args; 241 } else if (!strcmp(*args, "-signer")) { 242 if (!args[1]) 243 goto argerr; 244 /* If previous -signer argument add signer to list */ 245 246 if (signerfile) { 247 if (!sksigners) 248 sksigners = sk_OPENSSL_STRING_new_null(); 249 sk_OPENSSL_STRING_push(sksigners, signerfile); 250 if (!keyfile) 251 keyfile = signerfile; 252 if (!skkeys) 253 skkeys = sk_OPENSSL_STRING_new_null(); 254 sk_OPENSSL_STRING_push(skkeys, keyfile); 255 keyfile = NULL; 256 } 257 signerfile = *++args; 258 } else if (!strcmp(*args, "-recip")) { 259 if (!args[1]) 260 goto argerr; 261 recipfile = *++args; 262 } else if (!strcmp(*args, "-md")) { 263 if (!args[1]) 264 goto argerr; 265 sign_md = EVP_get_digestbyname(*++args); 266 if (sign_md == NULL) { 267 BIO_printf(bio_err, "Unknown digest %s\n", *args); 268 goto argerr; 269 } 270 } else if (!strcmp(*args, "-inkey")) { 271 if (!args[1]) 272 goto argerr; 273 /* If previous -inkey arument add signer to list */ 274 if (keyfile) { 275 if (!signerfile) { 276 BIO_puts(bio_err, "Illegal -inkey without -signer\n"); 277 goto argerr; 278 } 279 if (!sksigners) 280 sksigners = sk_OPENSSL_STRING_new_null(); 281 sk_OPENSSL_STRING_push(sksigners, signerfile); 282 signerfile = NULL; 283 if (!skkeys) 284 skkeys = sk_OPENSSL_STRING_new_null(); 285 sk_OPENSSL_STRING_push(skkeys, keyfile); 286 } 287 keyfile = *++args; 288 } else if (!strcmp(*args, "-keyform")) { 289 if (!args[1]) 290 goto argerr; 291 keyform = str2fmt(*++args); 292 } else if (!strcmp(*args, "-certfile")) { 293 if (!args[1]) 294 goto argerr; 295 certfile = *++args; 296 } else if (!strcmp(*args, "-CAfile")) { 297 if (!args[1]) 298 goto argerr; 299 CAfile = *++args; 300 } else if (!strcmp(*args, "-CApath")) { 301 if (!args[1]) 302 goto argerr; 303 CApath = *++args; 304 } else if (!strcmp(*args, "-in")) { 305 if (!args[1]) 306 goto argerr; 307 infile = *++args; 308 } else if (!strcmp(*args, "-inform")) { 309 if (!args[1]) 310 goto argerr; 311 informat = str2fmt(*++args); 312 } else if (!strcmp(*args, "-outform")) { 313 if (!args[1]) 314 goto argerr; 315 outformat = str2fmt(*++args); 316 } else if (!strcmp(*args, "-out")) { 317 if (!args[1]) 318 goto argerr; 319 outfile = *++args; 320 } else if (!strcmp(*args, "-content")) { 321 if (!args[1]) 322 goto argerr; 323 contfile = *++args; 324 } else if (args_verify(&args, NULL, &badarg, bio_err, &vpm)) 325 continue; 326 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL) 327 badarg = 1; 328 args++; 329 } 330 331 if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) { 332 BIO_puts(bio_err, "Multiple signers or keys not allowed\n"); 333 goto argerr; 334 } 335 336 if (operation & SMIME_SIGNERS) { 337 /* Check to see if any final signer needs to be appended */ 338 if (keyfile && !signerfile) { 339 BIO_puts(bio_err, "Illegal -inkey without -signer\n"); 340 goto argerr; 341 } 342 if (signerfile) { 343 if (!sksigners) 344 sksigners = sk_OPENSSL_STRING_new_null(); 345 sk_OPENSSL_STRING_push(sksigners, signerfile); 346 if (!skkeys) 347 skkeys = sk_OPENSSL_STRING_new_null(); 348 if (!keyfile) 349 keyfile = signerfile; 350 sk_OPENSSL_STRING_push(skkeys, keyfile); 351 } 352 if (!sksigners) { 353 BIO_printf(bio_err, "No signer certificate specified\n"); 354 badarg = 1; 355 } 356 signerfile = NULL; 357 keyfile = NULL; 358 need_rand = 1; 359 } else if (operation == SMIME_DECRYPT) { 360 if (!recipfile && !keyfile) { 361 BIO_printf(bio_err, 362 "No recipient certificate or key specified\n"); 363 badarg = 1; 364 } 365 } else if (operation == SMIME_ENCRYPT) { 366 if (!*args) { 367 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n"); 368 badarg = 1; 369 } 370 need_rand = 1; 371 } else if (!operation) 372 badarg = 1; 373 374 if (badarg) { 375 argerr: 376 BIO_printf(bio_err, "Usage smime [options] cert.pem ...\n"); 377 BIO_printf(bio_err, "where options are\n"); 378 BIO_printf(bio_err, "-encrypt encrypt message\n"); 379 BIO_printf(bio_err, "-decrypt decrypt encrypted message\n"); 380 BIO_printf(bio_err, "-sign sign message\n"); 381 BIO_printf(bio_err, "-verify verify signed message\n"); 382 BIO_printf(bio_err, "-pk7out output PKCS#7 structure\n"); 383#ifndef OPENSSL_NO_DES 384 BIO_printf(bio_err, "-des3 encrypt with triple DES\n"); 385 BIO_printf(bio_err, "-des encrypt with DES\n"); 386#endif 387#ifndef OPENSSL_NO_SEED 388 BIO_printf(bio_err, "-seed encrypt with SEED\n"); 389#endif 390#ifndef OPENSSL_NO_RC2 391 BIO_printf(bio_err, "-rc2-40 encrypt with RC2-40 (default)\n"); 392 BIO_printf(bio_err, "-rc2-64 encrypt with RC2-64\n"); 393 BIO_printf(bio_err, "-rc2-128 encrypt with RC2-128\n"); 394#endif 395#ifndef OPENSSL_NO_AES 396 BIO_printf(bio_err, "-aes128, -aes192, -aes256\n"); 397 BIO_printf(bio_err, 398 " encrypt PEM output with cbc aes\n"); 399#endif 400#ifndef OPENSSL_NO_CAMELLIA 401 BIO_printf(bio_err, "-camellia128, -camellia192, -camellia256\n"); 402 BIO_printf(bio_err, 403 " encrypt PEM output with cbc camellia\n"); 404#endif 405 BIO_printf(bio_err, 406 "-nointern don't search certificates in message for signer\n"); 407 BIO_printf(bio_err, 408 "-nosigs don't verify message signature\n"); 409 BIO_printf(bio_err, 410 "-noverify don't verify signers certificate\n"); 411 BIO_printf(bio_err, 412 "-nocerts don't include signers certificate when signing\n"); 413 BIO_printf(bio_err, "-nodetach use opaque signing\n"); 414 BIO_printf(bio_err, 415 "-noattr don't include any signed attributes\n"); 416 BIO_printf(bio_err, 417 "-binary don't translate message to text\n"); 418 BIO_printf(bio_err, "-certfile file other certificates file\n"); 419 BIO_printf(bio_err, "-signer file signer certificate file\n"); 420 BIO_printf(bio_err, 421 "-recip file recipient certificate file for decryption\n"); 422 BIO_printf(bio_err, "-in file input file\n"); 423 BIO_printf(bio_err, 424 "-inform arg input format SMIME (default), PEM or DER\n"); 425 BIO_printf(bio_err, 426 "-inkey file input private key (if not signer or recipient)\n"); 427 BIO_printf(bio_err, 428 "-keyform arg input private key format (PEM or ENGINE)\n"); 429 BIO_printf(bio_err, "-out file output file\n"); 430 BIO_printf(bio_err, 431 "-outform arg output format SMIME (default), PEM or DER\n"); 432 BIO_printf(bio_err, 433 "-content file supply or override content for detached signature\n"); 434 BIO_printf(bio_err, "-to addr to address\n"); 435 BIO_printf(bio_err, "-from ad from address\n"); 436 BIO_printf(bio_err, "-subject s subject\n"); 437 BIO_printf(bio_err, 438 "-text include or delete text MIME headers\n"); 439 BIO_printf(bio_err, 440 "-CApath dir trusted certificates directory\n"); 441 BIO_printf(bio_err, "-CAfile file trusted certificates file\n"); 442 BIO_printf(bio_err, 443 "-no_alt_chains only ever use the first certificate chain found\n"); 444 BIO_printf(bio_err, 445 "-crl_check check revocation status of signer's certificate using CRLs\n"); 446 BIO_printf(bio_err, 447 "-crl_check_all check revocation status of signer's certificate chain using CRLs\n"); 448#ifndef OPENSSL_NO_ENGINE 449 BIO_printf(bio_err, 450 "-engine e use engine e, possibly a hardware device.\n"); 451#endif 452 BIO_printf(bio_err, "-passin arg input file pass phrase source\n"); 453 BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, 454 LIST_SEPARATOR_CHAR); 455 BIO_printf(bio_err, 456 " load the file (or the files in the directory) into\n"); 457 BIO_printf(bio_err, " the random number generator\n"); 458 BIO_printf(bio_err, 459 "cert.pem recipient certificate(s) for encryption\n"); 460 goto end; 461 } 462 e = setup_engine(bio_err, engine, 0); 463 464 if (!app_passwd(bio_err, passargin, NULL, &passin, NULL)) { 465 BIO_printf(bio_err, "Error getting password\n"); 466 goto end; 467 } 468 469 if (need_rand) { 470 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 471 if (inrand != NULL) 472 BIO_printf(bio_err, "%ld semi-random bytes loaded\n", 473 app_RAND_load_files(inrand)); 474 } 475 476 ret = 2; 477 478 if (!(operation & SMIME_SIGNERS)) 479 flags &= ~PKCS7_DETACHED; 480 481 if (operation & SMIME_OP) { 482 if (outformat == FORMAT_ASN1) 483 outmode = "wb"; 484 } else { 485 if (flags & PKCS7_BINARY) 486 outmode = "wb"; 487 } 488 489 if (operation & SMIME_IP) { 490 if (informat == FORMAT_ASN1) 491 inmode = "rb"; 492 } else { 493 if (flags & PKCS7_BINARY) 494 inmode = "rb"; 495 } 496 497 if (operation == SMIME_ENCRYPT) { 498 if (!cipher) { 499#ifndef OPENSSL_NO_DES 500 cipher = EVP_des_ede3_cbc(); 501#else 502 BIO_printf(bio_err, "No cipher selected\n"); 503 goto end; 504#endif 505 } 506 encerts = sk_X509_new_null(); 507 while (*args) { 508 if (!(cert = load_cert(bio_err, *args, FORMAT_PEM, 509 NULL, e, "recipient certificate file"))) { 510#if 0 /* An appropriate message is already printed */ 511 BIO_printf(bio_err, 512 "Can't read recipient certificate file %s\n", 513 *args); 514#endif 515 goto end; 516 } 517 sk_X509_push(encerts, cert); 518 cert = NULL; 519 args++; 520 } 521 } 522 523 if (certfile) { 524 if (!(other = load_certs(bio_err, certfile, FORMAT_PEM, NULL, 525 e, "certificate file"))) { 526 ERR_print_errors(bio_err); 527 goto end; 528 } 529 } 530 531 if (recipfile && (operation == SMIME_DECRYPT)) { 532 if (!(recip = load_cert(bio_err, recipfile, FORMAT_PEM, NULL, 533 e, "recipient certificate file"))) { 534 ERR_print_errors(bio_err); 535 goto end; 536 } 537 } 538 539 if (operation == SMIME_DECRYPT) { 540 if (!keyfile) 541 keyfile = recipfile; 542 } else if (operation == SMIME_SIGN) { 543 if (!keyfile) 544 keyfile = signerfile; 545 } else 546 keyfile = NULL; 547 548 if (keyfile) { 549 key = load_key(bio_err, keyfile, keyform, 0, passin, e, 550 "signing key file"); 551 if (!key) 552 goto end; 553 } 554 555 if (infile) { 556 if (!(in = BIO_new_file(infile, inmode))) { 557 BIO_printf(bio_err, "Can't open input file %s\n", infile); 558 goto end; 559 } 560 } else 561 in = BIO_new_fp(stdin, BIO_NOCLOSE); 562 563 if (operation & SMIME_IP) { 564 if (informat == FORMAT_SMIME) 565 p7 = SMIME_read_PKCS7(in, &indata); 566 else if (informat == FORMAT_PEM) 567 p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL); 568 else if (informat == FORMAT_ASN1) 569 p7 = d2i_PKCS7_bio(in, NULL); 570 else { 571 BIO_printf(bio_err, "Bad input format for PKCS#7 file\n"); 572 goto end; 573 } 574 575 if (!p7) { 576 BIO_printf(bio_err, "Error reading S/MIME message\n"); 577 goto end; 578 } 579 if (contfile) { 580 BIO_free(indata); 581 if (!(indata = BIO_new_file(contfile, "rb"))) { 582 BIO_printf(bio_err, "Can't read content file %s\n", contfile); 583 goto end; 584 } 585 } 586 } 587 588 if (outfile) { 589 if (!(out = BIO_new_file(outfile, outmode))) { 590 BIO_printf(bio_err, "Can't open output file %s\n", outfile); 591 goto end; 592 } 593 } else { 594 out = BIO_new_fp(stdout, BIO_NOCLOSE); 595#ifdef OPENSSL_SYS_VMS 596 { 597 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 598 out = BIO_push(tmpbio, out); 599 } 600#endif 601 } 602 603 if (operation == SMIME_VERIFY) { 604 if (!(store = setup_verify(bio_err, CAfile, CApath))) 605 goto end; 606 X509_STORE_set_verify_cb(store, smime_cb); 607 if (vpm) 608 X509_STORE_set1_param(store, vpm); 609 } 610 611 ret = 3; 612 613 if (operation == SMIME_ENCRYPT) { 614 if (indef) 615 flags |= PKCS7_STREAM; 616 p7 = PKCS7_encrypt(encerts, in, cipher, flags); 617 } else if (operation & SMIME_SIGNERS) { 618 int i; 619 /* 620 * If detached data content we only enable streaming if S/MIME output 621 * format. 622 */ 623 if (operation == SMIME_SIGN) { 624 if (flags & PKCS7_DETACHED) { 625 if (outformat == FORMAT_SMIME) 626 flags |= PKCS7_STREAM; 627 } else if (indef) 628 flags |= PKCS7_STREAM; 629 flags |= PKCS7_PARTIAL; 630 p7 = PKCS7_sign(NULL, NULL, other, in, flags); 631 if (!p7) 632 goto end; 633 if (flags & PKCS7_NOCERTS) { 634 for (i = 0; i < sk_X509_num(other); i++) { 635 X509 *x = sk_X509_value(other, i); 636 PKCS7_add_certificate(p7, x); 637 } 638 } 639 } else 640 flags |= PKCS7_REUSE_DIGEST; 641 for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) { 642 signerfile = sk_OPENSSL_STRING_value(sksigners, i); 643 keyfile = sk_OPENSSL_STRING_value(skkeys, i); 644 signer = load_cert(bio_err, signerfile, FORMAT_PEM, NULL, 645 e, "signer certificate"); 646 if (!signer) 647 goto end; 648 key = load_key(bio_err, keyfile, keyform, 0, passin, e, 649 "signing key file"); 650 if (!key) 651 goto end; 652 if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags)) 653 goto end; 654 X509_free(signer); 655 signer = NULL; 656 EVP_PKEY_free(key); 657 key = NULL; 658 } 659 /* If not streaming or resigning finalize structure */ 660 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) { 661 if (!PKCS7_final(p7, in, flags)) 662 goto end; 663 } 664 } 665 666 if (!p7) { 667 BIO_printf(bio_err, "Error creating PKCS#7 structure\n"); 668 goto end; 669 } 670 671 ret = 4; 672 if (operation == SMIME_DECRYPT) { 673 if (!PKCS7_decrypt(p7, key, recip, out, flags)) { 674 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n"); 675 goto end; 676 } 677 } else if (operation == SMIME_VERIFY) { 678 STACK_OF(X509) *signers; 679 if (PKCS7_verify(p7, other, store, indata, out, flags)) 680 BIO_printf(bio_err, "Verification successful\n"); 681 else { 682 BIO_printf(bio_err, "Verification failure\n"); 683 goto end; 684 } 685 signers = PKCS7_get0_signers(p7, other, flags); 686 if (!save_certs(signerfile, signers)) { 687 BIO_printf(bio_err, "Error writing signers to %s\n", signerfile); 688 ret = 5; 689 goto end; 690 } 691 sk_X509_free(signers); 692 } else if (operation == SMIME_PK7OUT) 693 PEM_write_bio_PKCS7(out, p7); 694 else { 695 if (to) 696 BIO_printf(out, "To: %s\n", to); 697 if (from) 698 BIO_printf(out, "From: %s\n", from); 699 if (subject) 700 BIO_printf(out, "Subject: %s\n", subject); 701 if (outformat == FORMAT_SMIME) { 702 if (operation == SMIME_RESIGN) 703 SMIME_write_PKCS7(out, p7, indata, flags); 704 else 705 SMIME_write_PKCS7(out, p7, in, flags); 706 } else if (outformat == FORMAT_PEM) 707 PEM_write_bio_PKCS7_stream(out, p7, in, flags); 708 else if (outformat == FORMAT_ASN1) 709 i2d_PKCS7_bio_stream(out, p7, in, flags); 710 else { 711 BIO_printf(bio_err, "Bad output format for PKCS#7 file\n"); 712 goto end; 713 } 714 } 715 ret = 0; 716 end: 717 if (need_rand) 718 app_RAND_write_file(NULL, bio_err); 719 if (ret) 720 ERR_print_errors(bio_err); 721 sk_X509_pop_free(encerts, X509_free); 722 sk_X509_pop_free(other, X509_free); 723 if (vpm) 724 X509_VERIFY_PARAM_free(vpm); 725 if (sksigners) 726 sk_OPENSSL_STRING_free(sksigners); 727 if (skkeys) 728 sk_OPENSSL_STRING_free(skkeys); 729 X509_STORE_free(store); 730 X509_free(cert); 731 X509_free(recip); 732 X509_free(signer); 733 EVP_PKEY_free(key); 734 PKCS7_free(p7); 735 release_engine(e); 736 BIO_free(in); 737 BIO_free(indata); 738 BIO_free_all(out); 739 if (passin) 740 OPENSSL_free(passin); 741 return (ret); 742} 743 744static int save_certs(char *signerfile, STACK_OF(X509) *signers) 745{ 746 int i; 747 BIO *tmp; 748 if (!signerfile) 749 return 1; 750 tmp = BIO_new_file(signerfile, "w"); 751 if (!tmp) 752 return 0; 753 for (i = 0; i < sk_X509_num(signers); i++) 754 PEM_write_bio_X509(tmp, sk_X509_value(signers, i)); 755 BIO_free(tmp); 756 return 1; 757} 758 759/* Minimal callback just to output policy info (if any) */ 760 761static int smime_cb(int ok, X509_STORE_CTX *ctx) 762{ 763 int error; 764 765 error = X509_STORE_CTX_get_error(ctx); 766 767 if ((error != X509_V_ERR_NO_EXPLICIT_POLICY) 768 && ((error != X509_V_OK) || (ok != 2))) 769 return ok; 770 771 policies_print(NULL, ctx); 772 773 return ok; 774 775} 776