1/* 2 * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10/* S/MIME utility function */ 11 12#include <stdio.h> 13#include <string.h> 14#include "apps.h" 15#include "progs.h" 16#include <openssl/crypto.h> 17#include <openssl/pem.h> 18#include <openssl/err.h> 19#include <openssl/x509_vfy.h> 20#include <openssl/x509v3.h> 21 22static int save_certs(char *signerfile, STACK_OF(X509) *signers); 23static int smime_cb(int ok, X509_STORE_CTX *ctx); 24 25#define SMIME_OP 0x10 26#define SMIME_IP 0x20 27#define SMIME_SIGNERS 0x40 28#define SMIME_ENCRYPT (1 | SMIME_OP) 29#define SMIME_DECRYPT (2 | SMIME_IP) 30#define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS) 31#define SMIME_VERIFY (4 | SMIME_IP) 32#define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP) 33#define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS) 34 35typedef enum OPTION_choice { 36 OPT_COMMON, 37 OPT_ENCRYPT, OPT_DECRYPT, OPT_SIGN, OPT_RESIGN, OPT_VERIFY, 38 OPT_PK7OUT, OPT_TEXT, OPT_NOINTERN, OPT_NOVERIFY, OPT_NOCHAIN, 39 OPT_NOCERTS, OPT_NOATTR, OPT_NODETACH, OPT_NOSMIMECAP, 40 OPT_BINARY, OPT_NOSIGS, OPT_STREAM, OPT_INDEF, OPT_NOINDEF, 41 OPT_CRLFEOL, OPT_ENGINE, OPT_PASSIN, 42 OPT_TO, OPT_FROM, OPT_SUBJECT, OPT_SIGNER, OPT_RECIP, OPT_MD, 43 OPT_CIPHER, OPT_INKEY, OPT_KEYFORM, OPT_CERTFILE, OPT_CAFILE, 44 OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE, OPT_NOCAPATH, OPT_NOCASTORE, 45 OPT_R_ENUM, OPT_PROV_ENUM, OPT_CONFIG, 46 OPT_V_ENUM, 47 OPT_IN, OPT_INFORM, OPT_OUT, 48 OPT_OUTFORM, OPT_CONTENT 49} OPTION_CHOICE; 50 51const OPTIONS smime_options[] = { 52 {OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert...]\n"}, 53 54 OPT_SECTION("General"), 55 {"help", OPT_HELP, '-', "Display this summary"}, 56 {"in", OPT_IN, '<', "Input file"}, 57 {"inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER"}, 58 {"out", OPT_OUT, '>', "Output file"}, 59 {"outform", OPT_OUTFORM, 'c', 60 "Output format SMIME (default), PEM or DER"}, 61 {"inkey", OPT_INKEY, 's', 62 "Input private key (if not signer or recipient)"}, 63 {"keyform", OPT_KEYFORM, 'f', "Input private key format (ENGINE, other values ignored)"}, 64#ifndef OPENSSL_NO_ENGINE 65 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, 66#endif 67 {"stream", OPT_STREAM, '-', "Enable CMS streaming" }, 68 {"indef", OPT_INDEF, '-', "Same as -stream" }, 69 {"noindef", OPT_NOINDEF, '-', "Disable CMS streaming"}, 70 OPT_CONFIG_OPTION, 71 72 OPT_SECTION("Action"), 73 {"encrypt", OPT_ENCRYPT, '-', "Encrypt message"}, 74 {"decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message"}, 75 {"sign", OPT_SIGN, '-', "Sign message"}, 76 {"resign", OPT_RESIGN, '-', "Resign a signed message"}, 77 {"verify", OPT_VERIFY, '-', "Verify signed message"}, 78 79 OPT_SECTION("Signing/Encryption"), 80 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"}, 81 {"md", OPT_MD, 's', "Digest algorithm to use when signing or resigning"}, 82 {"", OPT_CIPHER, '-', "Any supported cipher"}, 83 {"pk7out", OPT_PK7OUT, '-', "Output PKCS#7 structure"}, 84 {"nointern", OPT_NOINTERN, '-', 85 "Don't search certificates in message for signer"}, 86 {"nodetach", OPT_NODETACH, '-', "Use opaque signing"}, 87 {"noattr", OPT_NOATTR, '-', "Don't include any signed attributes"}, 88 {"binary", OPT_BINARY, '-', "Don't translate message to text"}, 89 {"signer", OPT_SIGNER, 's', "Signer certificate file"}, 90 {"content", OPT_CONTENT, '<', 91 "Supply or override content for detached signature"}, 92 {"nocerts", OPT_NOCERTS, '-', 93 "Don't include signers certificate when signing"}, 94 95 OPT_SECTION("Verification/Decryption"), 96 {"nosigs", OPT_NOSIGS, '-', "Don't verify message signature"}, 97 {"noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate"}, 98 99 {"certfile", OPT_CERTFILE, '<', "Other certificates file"}, 100 {"recip", OPT_RECIP, '<', "Recipient certificate file for decryption"}, 101 102 OPT_SECTION("Email"), 103 {"to", OPT_TO, 's', "To address"}, 104 {"from", OPT_FROM, 's', "From address"}, 105 {"subject", OPT_SUBJECT, 's', "Subject"}, 106 {"text", OPT_TEXT, '-', "Include or delete text MIME headers"}, 107 {"nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute"}, 108 109 OPT_SECTION("Certificate chain"), 110 {"CApath", OPT_CAPATH, '/', "Trusted certificates directory"}, 111 {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"}, 112 {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"}, 113 {"no-CAfile", OPT_NOCAFILE, '-', 114 "Do not load the default certificates file"}, 115 {"no-CApath", OPT_NOCAPATH, '-', 116 "Do not load certificates from the default certificates directory"}, 117 {"no-CAstore", OPT_NOCASTORE, '-', 118 "Do not load certificates from the default certificates store"}, 119 {"nochain", OPT_NOCHAIN, '-', 120 "set PKCS7_NOCHAIN so certificates contained in the message are not used as untrusted CAs" }, 121 {"crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of CR only"}, 122 123 OPT_R_OPTIONS, 124 OPT_V_OPTIONS, 125 OPT_PROV_OPTIONS, 126 127 OPT_PARAMETERS(), 128 {"cert", 0, 0, "Recipient certs, used when encrypting"}, 129 {NULL} 130}; 131 132int smime_main(int argc, char **argv) 133{ 134 CONF *conf = NULL; 135 BIO *in = NULL, *out = NULL, *indata = NULL; 136 EVP_PKEY *key = NULL; 137 PKCS7 *p7 = NULL; 138 STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL; 139 STACK_OF(X509) *encerts = NULL, *other = NULL; 140 X509 *cert = NULL, *recip = NULL, *signer = NULL; 141 X509_STORE *store = NULL; 142 X509_VERIFY_PARAM *vpm = NULL; 143 EVP_CIPHER *cipher = NULL; 144 EVP_MD *sign_md = NULL; 145 const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL, *prog = NULL; 146 char *certfile = NULL, *keyfile = NULL, *contfile = NULL; 147 char *infile = NULL, *outfile = NULL, *signerfile = NULL, *recipfile = NULL; 148 char *passinarg = NULL, *passin = NULL, *to = NULL, *from = NULL; 149 char *subject = NULL, *digestname = NULL, *ciphername = NULL; 150 OPTION_CHOICE o; 151 int noCApath = 0, noCAfile = 0, noCAstore = 0; 152 int flags = PKCS7_DETACHED, operation = 0, ret = 0, indef = 0; 153 int informat = FORMAT_SMIME, outformat = FORMAT_SMIME, keyform = 154 FORMAT_UNDEF; 155 int vpmtouched = 0, rv = 0; 156 ENGINE *e = NULL; 157 const char *mime_eol = "\n"; 158 OSSL_LIB_CTX *libctx = app_get0_libctx(); 159 160 if ((vpm = X509_VERIFY_PARAM_new()) == NULL) 161 return 1; 162 163 prog = opt_init(argc, argv, smime_options); 164 while ((o = opt_next()) != OPT_EOF) { 165 switch (o) { 166 case OPT_EOF: 167 case OPT_ERR: 168 opthelp: 169 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 170 goto end; 171 case OPT_HELP: 172 opt_help(smime_options); 173 ret = 0; 174 goto end; 175 case OPT_INFORM: 176 if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat)) 177 goto opthelp; 178 break; 179 case OPT_IN: 180 infile = opt_arg(); 181 break; 182 case OPT_OUTFORM: 183 if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat)) 184 goto opthelp; 185 break; 186 case OPT_OUT: 187 outfile = opt_arg(); 188 break; 189 case OPT_ENCRYPT: 190 operation = SMIME_ENCRYPT; 191 break; 192 case OPT_DECRYPT: 193 operation = SMIME_DECRYPT; 194 break; 195 case OPT_SIGN: 196 operation = SMIME_SIGN; 197 break; 198 case OPT_RESIGN: 199 operation = SMIME_RESIGN; 200 break; 201 case OPT_VERIFY: 202 operation = SMIME_VERIFY; 203 break; 204 case OPT_PK7OUT: 205 operation = SMIME_PK7OUT; 206 break; 207 case OPT_TEXT: 208 flags |= PKCS7_TEXT; 209 break; 210 case OPT_NOINTERN: 211 flags |= PKCS7_NOINTERN; 212 break; 213 case OPT_NOVERIFY: 214 flags |= PKCS7_NOVERIFY; 215 break; 216 case OPT_NOCHAIN: 217 flags |= PKCS7_NOCHAIN; 218 break; 219 case OPT_NOCERTS: 220 flags |= PKCS7_NOCERTS; 221 break; 222 case OPT_NOATTR: 223 flags |= PKCS7_NOATTR; 224 break; 225 case OPT_NODETACH: 226 flags &= ~PKCS7_DETACHED; 227 break; 228 case OPT_NOSMIMECAP: 229 flags |= PKCS7_NOSMIMECAP; 230 break; 231 case OPT_BINARY: 232 flags |= PKCS7_BINARY; 233 break; 234 case OPT_NOSIGS: 235 flags |= PKCS7_NOSIGS; 236 break; 237 case OPT_STREAM: 238 case OPT_INDEF: 239 indef = 1; 240 break; 241 case OPT_NOINDEF: 242 indef = 0; 243 break; 244 case OPT_CRLFEOL: 245 flags |= PKCS7_CRLFEOL; 246 mime_eol = "\r\n"; 247 break; 248 case OPT_R_CASES: 249 if (!opt_rand(o)) 250 goto end; 251 break; 252 case OPT_PROV_CASES: 253 if (!opt_provider(o)) 254 goto end; 255 break; 256 case OPT_CONFIG: 257 conf = app_load_config_modules(opt_arg()); 258 if (conf == NULL) 259 goto end; 260 break; 261 case OPT_ENGINE: 262 e = setup_engine(opt_arg(), 0); 263 break; 264 case OPT_PASSIN: 265 passinarg = opt_arg(); 266 break; 267 case OPT_TO: 268 to = opt_arg(); 269 break; 270 case OPT_FROM: 271 from = opt_arg(); 272 break; 273 case OPT_SUBJECT: 274 subject = opt_arg(); 275 break; 276 case OPT_SIGNER: 277 /* If previous -signer argument add signer to list */ 278 if (signerfile != NULL) { 279 if (sksigners == NULL 280 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) 281 goto end; 282 sk_OPENSSL_STRING_push(sksigners, signerfile); 283 if (keyfile == NULL) 284 keyfile = signerfile; 285 if (skkeys == NULL 286 && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) 287 goto end; 288 sk_OPENSSL_STRING_push(skkeys, keyfile); 289 keyfile = NULL; 290 } 291 signerfile = opt_arg(); 292 break; 293 case OPT_RECIP: 294 recipfile = opt_arg(); 295 break; 296 case OPT_MD: 297 digestname = opt_arg(); 298 break; 299 case OPT_CIPHER: 300 ciphername = opt_unknown(); 301 break; 302 case OPT_INKEY: 303 /* If previous -inkey argument add signer to list */ 304 if (keyfile != NULL) { 305 if (signerfile == NULL) { 306 BIO_printf(bio_err, 307 "%s: Must have -signer before -inkey\n", prog); 308 goto opthelp; 309 } 310 if (sksigners == NULL 311 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) 312 goto end; 313 sk_OPENSSL_STRING_push(sksigners, signerfile); 314 signerfile = NULL; 315 if (skkeys == NULL 316 && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) 317 goto end; 318 sk_OPENSSL_STRING_push(skkeys, keyfile); 319 } 320 keyfile = opt_arg(); 321 break; 322 case OPT_KEYFORM: 323 if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform)) 324 goto opthelp; 325 break; 326 case OPT_CERTFILE: 327 certfile = opt_arg(); 328 break; 329 case OPT_CAFILE: 330 CAfile = opt_arg(); 331 break; 332 case OPT_CAPATH: 333 CApath = opt_arg(); 334 break; 335 case OPT_CASTORE: 336 CAstore = opt_arg(); 337 break; 338 case OPT_NOCAFILE: 339 noCAfile = 1; 340 break; 341 case OPT_NOCAPATH: 342 noCApath = 1; 343 break; 344 case OPT_NOCASTORE: 345 noCAstore = 1; 346 break; 347 case OPT_CONTENT: 348 contfile = opt_arg(); 349 break; 350 case OPT_V_CASES: 351 if (!opt_verify(o, vpm)) 352 goto opthelp; 353 vpmtouched++; 354 break; 355 } 356 } 357 358 /* Extra arguments are files with recipient keys. */ 359 argc = opt_num_rest(); 360 argv = opt_rest(); 361 362 if (!app_RAND_load()) 363 goto end; 364 365 if (digestname != NULL) { 366 if (!opt_md(digestname, &sign_md)) 367 goto opthelp; 368 } 369 if (ciphername != NULL) { 370 if (!opt_cipher_any(ciphername, &cipher)) 371 goto opthelp; 372 } 373 if (!(operation & SMIME_SIGNERS) && (skkeys != NULL || sksigners != NULL)) { 374 BIO_puts(bio_err, "Multiple signers or keys not allowed\n"); 375 goto opthelp; 376 } 377 if (!operation) { 378 BIO_puts(bio_err, 379 "No operation (-encrypt|-sign|...) specified\n"); 380 goto opthelp; 381 } 382 383 if (operation & SMIME_SIGNERS) { 384 /* Check to see if any final signer needs to be appended */ 385 if (keyfile && !signerfile) { 386 BIO_puts(bio_err, "Illegal -inkey without -signer\n"); 387 goto opthelp; 388 } 389 if (signerfile != NULL) { 390 if (sksigners == NULL 391 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) 392 goto end; 393 sk_OPENSSL_STRING_push(sksigners, signerfile); 394 if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) 395 goto end; 396 if (!keyfile) 397 keyfile = signerfile; 398 sk_OPENSSL_STRING_push(skkeys, keyfile); 399 } 400 if (sksigners == NULL) { 401 BIO_printf(bio_err, "No signer certificate specified\n"); 402 goto opthelp; 403 } 404 signerfile = NULL; 405 keyfile = NULL; 406 } else if (operation == SMIME_DECRYPT) { 407 if (recipfile == NULL && keyfile == NULL) { 408 BIO_printf(bio_err, 409 "No recipient certificate or key specified\n"); 410 goto opthelp; 411 } 412 } else if (operation == SMIME_ENCRYPT) { 413 if (argc == 0) { 414 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n"); 415 goto opthelp; 416 } 417 } 418 419 if (!app_passwd(passinarg, NULL, &passin, NULL)) { 420 BIO_printf(bio_err, "Error getting password\n"); 421 goto end; 422 } 423 424 ret = 2; 425 426 if (!(operation & SMIME_SIGNERS)) 427 flags &= ~PKCS7_DETACHED; 428 429 if (!(operation & SMIME_OP)) { 430 if (flags & PKCS7_BINARY) 431 outformat = FORMAT_BINARY; 432 } 433 434 if (!(operation & SMIME_IP)) { 435 if (flags & PKCS7_BINARY) 436 informat = FORMAT_BINARY; 437 } 438 439 if (operation == SMIME_ENCRYPT) { 440 if (cipher == NULL) { 441#ifndef OPENSSL_NO_DES 442 cipher = (EVP_CIPHER *)EVP_des_ede3_cbc(); 443#else 444 BIO_printf(bio_err, "No cipher selected\n"); 445 goto end; 446#endif 447 } 448 encerts = sk_X509_new_null(); 449 if (encerts == NULL) 450 goto end; 451 while (*argv != NULL) { 452 cert = load_cert(*argv, FORMAT_UNDEF, 453 "recipient certificate file"); 454 if (cert == NULL) 455 goto end; 456 sk_X509_push(encerts, cert); 457 cert = NULL; 458 argv++; 459 } 460 } 461 462 if (certfile != NULL) { 463 if (!load_certs(certfile, 0, &other, NULL, "certificates")) { 464 ERR_print_errors(bio_err); 465 goto end; 466 } 467 } 468 469 if (recipfile != NULL && (operation == SMIME_DECRYPT)) { 470 if ((recip = load_cert(recipfile, FORMAT_UNDEF, 471 "recipient certificate file")) == NULL) { 472 ERR_print_errors(bio_err); 473 goto end; 474 } 475 } 476 477 if (operation == SMIME_DECRYPT) { 478 if (keyfile == NULL) 479 keyfile = recipfile; 480 } else if (operation == SMIME_SIGN) { 481 if (keyfile == NULL) 482 keyfile = signerfile; 483 } else { 484 keyfile = NULL; 485 } 486 487 if (keyfile != NULL) { 488 key = load_key(keyfile, keyform, 0, passin, e, "signing key"); 489 if (key == NULL) 490 goto end; 491 } 492 493 in = bio_open_default(infile, 'r', informat); 494 if (in == NULL) 495 goto end; 496 497 if (operation & SMIME_IP) { 498 PKCS7 *p7_in = NULL; 499 500 p7 = PKCS7_new_ex(libctx, app_get0_propq()); 501 if (p7 == NULL) { 502 BIO_printf(bio_err, "Error allocating PKCS7 object\n"); 503 goto end; 504 } 505 if (informat == FORMAT_SMIME) { 506 p7_in = SMIME_read_PKCS7_ex(in, &indata, &p7); 507 } else if (informat == FORMAT_PEM) { 508 p7_in = PEM_read_bio_PKCS7(in, &p7, NULL, NULL); 509 } else if (informat == FORMAT_ASN1) { 510 p7_in = d2i_PKCS7_bio(in, &p7); 511 } else { 512 BIO_printf(bio_err, "Bad input format for PKCS#7 file\n"); 513 goto end; 514 } 515 516 if (p7_in == NULL) { 517 BIO_printf(bio_err, "Error reading S/MIME message\n"); 518 goto end; 519 } 520 if (contfile != NULL) { 521 BIO_free(indata); 522 if ((indata = BIO_new_file(contfile, "rb")) == NULL) { 523 BIO_printf(bio_err, "Can't read content file %s\n", contfile); 524 goto end; 525 } 526 } 527 } 528 529 out = bio_open_default(outfile, 'w', outformat); 530 if (out == NULL) 531 goto end; 532 533 if (operation == SMIME_VERIFY) { 534 if ((store = setup_verify(CAfile, noCAfile, CApath, noCApath, 535 CAstore, noCAstore)) == NULL) 536 goto end; 537 X509_STORE_set_verify_cb(store, smime_cb); 538 if (vpmtouched) 539 X509_STORE_set1_param(store, vpm); 540 } 541 542 ret = 3; 543 544 if (operation == SMIME_ENCRYPT) { 545 if (indef) 546 flags |= PKCS7_STREAM; 547 p7 = PKCS7_encrypt_ex(encerts, in, cipher, flags, libctx, app_get0_propq()); 548 } else if (operation & SMIME_SIGNERS) { 549 int i; 550 /* 551 * If detached data content we only enable streaming if S/MIME output 552 * format. 553 */ 554 if (operation == SMIME_SIGN) { 555 if (flags & PKCS7_DETACHED) { 556 if (outformat == FORMAT_SMIME) 557 flags |= PKCS7_STREAM; 558 } else if (indef) { 559 flags |= PKCS7_STREAM; 560 } 561 flags |= PKCS7_PARTIAL; 562 p7 = PKCS7_sign_ex(NULL, NULL, other, in, flags, libctx, app_get0_propq()); 563 if (p7 == NULL) 564 goto end; 565 if (flags & PKCS7_NOCERTS) { 566 for (i = 0; i < sk_X509_num(other); i++) { 567 X509 *x = sk_X509_value(other, i); 568 PKCS7_add_certificate(p7, x); 569 } 570 } 571 } else { 572 flags |= PKCS7_REUSE_DIGEST; 573 } 574 for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) { 575 signerfile = sk_OPENSSL_STRING_value(sksigners, i); 576 keyfile = sk_OPENSSL_STRING_value(skkeys, i); 577 signer = load_cert(signerfile, FORMAT_UNDEF, "signer certificate"); 578 if (signer == NULL) 579 goto end; 580 key = load_key(keyfile, keyform, 0, passin, e, "signing key"); 581 if (key == NULL) 582 goto end; 583 584 if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags)) 585 goto end; 586 X509_free(signer); 587 signer = NULL; 588 EVP_PKEY_free(key); 589 key = NULL; 590 } 591 /* If not streaming or resigning finalize structure */ 592 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) { 593 if (!PKCS7_final(p7, in, flags)) 594 goto end; 595 } 596 } 597 598 if (p7 == NULL) { 599 BIO_printf(bio_err, "Error creating PKCS#7 structure\n"); 600 goto end; 601 } 602 603 ret = 4; 604 if (operation == SMIME_DECRYPT) { 605 if (!PKCS7_decrypt(p7, key, recip, out, flags)) { 606 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n"); 607 goto end; 608 } 609 } else if (operation == SMIME_VERIFY) { 610 STACK_OF(X509) *signers; 611 if (PKCS7_verify(p7, other, store, indata, out, flags)) 612 BIO_printf(bio_err, "Verification successful\n"); 613 else { 614 BIO_printf(bio_err, "Verification failure\n"); 615 goto end; 616 } 617 signers = PKCS7_get0_signers(p7, other, flags); 618 if (!save_certs(signerfile, signers)) { 619 BIO_printf(bio_err, "Error writing signers to %s\n", signerfile); 620 ret = 5; 621 goto end; 622 } 623 sk_X509_free(signers); 624 } else if (operation == SMIME_PK7OUT) { 625 PEM_write_bio_PKCS7(out, p7); 626 } else { 627 if (to) 628 BIO_printf(out, "To: %s%s", to, mime_eol); 629 if (from) 630 BIO_printf(out, "From: %s%s", from, mime_eol); 631 if (subject) 632 BIO_printf(out, "Subject: %s%s", subject, mime_eol); 633 if (outformat == FORMAT_SMIME) { 634 if (operation == SMIME_RESIGN) 635 rv = SMIME_write_PKCS7(out, p7, indata, flags); 636 else 637 rv = SMIME_write_PKCS7(out, p7, in, flags); 638 } else if (outformat == FORMAT_PEM) { 639 rv = PEM_write_bio_PKCS7_stream(out, p7, in, flags); 640 } else if (outformat == FORMAT_ASN1) { 641 rv = i2d_PKCS7_bio_stream(out, p7, in, flags); 642 } else { 643 BIO_printf(bio_err, "Bad output format for PKCS#7 file\n"); 644 goto end; 645 } 646 if (rv == 0) { 647 BIO_printf(bio_err, "Error writing output\n"); 648 ret = 3; 649 goto end; 650 } 651 } 652 ret = 0; 653 end: 654 if (ret) 655 ERR_print_errors(bio_err); 656 sk_X509_pop_free(encerts, X509_free); 657 sk_X509_pop_free(other, X509_free); 658 X509_VERIFY_PARAM_free(vpm); 659 sk_OPENSSL_STRING_free(sksigners); 660 sk_OPENSSL_STRING_free(skkeys); 661 X509_STORE_free(store); 662 X509_free(cert); 663 X509_free(recip); 664 X509_free(signer); 665 EVP_PKEY_free(key); 666 EVP_MD_free(sign_md); 667 EVP_CIPHER_free(cipher); 668 PKCS7_free(p7); 669 release_engine(e); 670 BIO_free(in); 671 BIO_free(indata); 672 BIO_free_all(out); 673 OPENSSL_free(passin); 674 NCONF_free(conf); 675 return ret; 676} 677 678static int save_certs(char *signerfile, STACK_OF(X509) *signers) 679{ 680 int i; 681 BIO *tmp; 682 683 if (signerfile == NULL) 684 return 1; 685 tmp = BIO_new_file(signerfile, "w"); 686 if (tmp == NULL) 687 return 0; 688 for (i = 0; i < sk_X509_num(signers); i++) 689 PEM_write_bio_X509(tmp, sk_X509_value(signers, i)); 690 BIO_free(tmp); 691 return 1; 692} 693 694/* Minimal callback just to output policy info (if any) */ 695 696static int smime_cb(int ok, X509_STORE_CTX *ctx) 697{ 698 int error; 699 700 error = X509_STORE_CTX_get_error(ctx); 701 702 if ((error != X509_V_ERR_NO_EXPLICIT_POLICY) 703 && ((error != X509_V_OK) || (ok != 2))) 704 return ok; 705 706 policies_print(ctx); 707 708 return ok; 709} 710