1 /* 2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 <openssl/crypto.h> 16 #include <openssl/pem.h> 17 #include <openssl/err.h> 18 #include <openssl/x509_vfy.h> 19 #include <openssl/x509v3.h> 20 21 static int save_certs(char *signerfile, STACK_OF(X509) *signers); 22 static int smime_cb(int ok, X509_STORE_CTX *ctx); 23 24 #define SMIME_OP 0x10 25 #define SMIME_IP 0x20 26 #define SMIME_SIGNERS 0x40 27 #define SMIME_ENCRYPT (1 | SMIME_OP) 28 #define SMIME_DECRYPT (2 | SMIME_IP) 29 #define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS) 30 #define SMIME_VERIFY (4 | SMIME_IP) 31 #define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP) 32 #define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS) 33 34 typedef enum OPTION_choice { 35 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, 36 OPT_ENCRYPT, OPT_DECRYPT, OPT_SIGN, OPT_RESIGN, OPT_VERIFY, 37 OPT_PK7OUT, OPT_TEXT, OPT_NOINTERN, OPT_NOVERIFY, OPT_NOCHAIN, 38 OPT_NOCERTS, OPT_NOATTR, OPT_NODETACH, OPT_NOSMIMECAP, 39 OPT_BINARY, OPT_NOSIGS, OPT_STREAM, OPT_INDEF, OPT_NOINDEF, 40 OPT_CRLFEOL, OPT_RAND, OPT_ENGINE, OPT_PASSIN, 41 OPT_TO, OPT_FROM, OPT_SUBJECT, OPT_SIGNER, OPT_RECIP, OPT_MD, 42 OPT_CIPHER, OPT_INKEY, OPT_KEYFORM, OPT_CERTFILE, OPT_CAFILE, 43 OPT_V_ENUM, 44 OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH, OPT_IN, OPT_INFORM, OPT_OUT, 45 OPT_OUTFORM, OPT_CONTENT 46 } OPTION_CHOICE; 47 48 OPTIONS smime_options[] = { 49 {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"}, 50 {OPT_HELP_STR, 1, '-', 51 " cert.pem... recipient certs for encryption\n"}, 52 {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, 53 {"help", OPT_HELP, '-', "Display this summary"}, 54 {"encrypt", OPT_ENCRYPT, '-', "Encrypt message"}, 55 {"decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message"}, 56 {"sign", OPT_SIGN, '-', "Sign message"}, 57 {"verify", OPT_VERIFY, '-', "Verify signed message"}, 58 {"pk7out", OPT_PK7OUT, '-', "Output PKCS#7 structure"}, 59 {"nointern", OPT_NOINTERN, '-', 60 "Don't search certificates in message for signer"}, 61 {"nosigs", OPT_NOSIGS, '-', "Don't verify message signature"}, 62 {"noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate"}, 63 {"nocerts", OPT_NOCERTS, '-', 64 "Don't include signers certificate when signing"}, 65 {"nodetach", OPT_NODETACH, '-', "Use opaque signing"}, 66 {"noattr", OPT_NOATTR, '-', "Don't include any signed attributes"}, 67 {"binary", OPT_BINARY, '-', "Don't translate message to text"}, 68 {"certfile", OPT_CERTFILE, '<', "Other certificates file"}, 69 {"signer", OPT_SIGNER, 's', "Signer certificate file"}, 70 {"recip", OPT_RECIP, '<', "Recipient certificate file for decryption"}, 71 {"in", OPT_IN, '<', "Input file"}, 72 {"inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER"}, 73 {"inkey", OPT_INKEY, 's', 74 "Input private key (if not signer or recipient)"}, 75 {"keyform", OPT_KEYFORM, 'f', "Input private key format (PEM or ENGINE)"}, 76 {"out", OPT_OUT, '>', "Output file"}, 77 {"outform", OPT_OUTFORM, 'c', 78 "Output format SMIME (default), PEM or DER"}, 79 {"content", OPT_CONTENT, '<', 80 "Supply or override content for detached signature"}, 81 {"to", OPT_TO, 's', "To address"}, 82 {"from", OPT_FROM, 's', "From address"}, 83 {"subject", OPT_SUBJECT, 's', "Subject"}, 84 {"text", OPT_TEXT, '-', "Include or delete text MIME headers"}, 85 {"CApath", OPT_CAPATH, '/', "Trusted certificates directory"}, 86 {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"}, 87 {"no-CAfile", OPT_NOCAFILE, '-', 88 "Do not load the default certificates file"}, 89 {"no-CApath", OPT_NOCAPATH, '-', 90 "Do not load certificates from the default certificates directory"}, 91 {"resign", OPT_RESIGN, '-', "Resign a signed message"}, 92 {"nochain", OPT_NOCHAIN, '-', 93 "set PKCS7_NOCHAIN so certificates contained in the message are not used as untrusted CAs" }, 94 {"nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute"}, 95 {"stream", OPT_STREAM, '-', "Enable CMS streaming" }, 96 {"indef", OPT_INDEF, '-', "Same as -stream" }, 97 {"noindef", OPT_NOINDEF, '-', "Disable CMS streaming"}, 98 {"crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of CR only"}, 99 {"rand", OPT_RAND, 's', 100 "Load the file(s) into the random number generator"}, 101 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"}, 102 {"md", OPT_MD, 's', "Digest algorithm to use when signing or resigning"}, 103 {"", OPT_CIPHER, '-', "Any supported cipher"}, 104 OPT_V_OPTIONS, 105 #ifndef OPENSSL_NO_ENGINE 106 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, 107 #endif 108 {NULL} 109 }; 110 111 int smime_main(int argc, char **argv) 112 { 113 BIO *in = NULL, *out = NULL, *indata = NULL; 114 EVP_PKEY *key = NULL; 115 PKCS7 *p7 = NULL; 116 STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL; 117 STACK_OF(X509) *encerts = NULL, *other = NULL; 118 X509 *cert = NULL, *recip = NULL, *signer = NULL; 119 X509_STORE *store = NULL; 120 X509_VERIFY_PARAM *vpm = NULL; 121 const EVP_CIPHER *cipher = NULL; 122 const EVP_MD *sign_md = NULL; 123 const char *CAfile = NULL, *CApath = NULL, *prog = NULL; 124 char *certfile = NULL, *keyfile = NULL, *contfile = NULL, *inrand = NULL; 125 char *infile = NULL, *outfile = NULL, *signerfile = NULL, *recipfile = 126 NULL; 127 char *passinarg = NULL, *passin = NULL, *to = NULL, *from = 128 NULL, *subject = NULL; 129 OPTION_CHOICE o; 130 int noCApath = 0, noCAfile = 0; 131 int flags = PKCS7_DETACHED, operation = 0, ret = 0, need_rand = 0, indef = 132 0; 133 int informat = FORMAT_SMIME, outformat = FORMAT_SMIME, keyform = 134 FORMAT_PEM; 135 int vpmtouched = 0, rv = 0; 136 ENGINE *e = NULL; 137 const char *mime_eol = "\n"; 138 139 if ((vpm = X509_VERIFY_PARAM_new()) == NULL) 140 return 1; 141 142 prog = opt_init(argc, argv, smime_options); 143 while ((o = opt_next()) != OPT_EOF) { 144 switch (o) { 145 case OPT_EOF: 146 case OPT_ERR: 147 opthelp: 148 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 149 goto end; 150 case OPT_HELP: 151 opt_help(smime_options); 152 ret = 0; 153 goto end; 154 case OPT_INFORM: 155 if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat)) 156 goto opthelp; 157 break; 158 case OPT_IN: 159 infile = opt_arg(); 160 break; 161 case OPT_OUTFORM: 162 if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat)) 163 goto opthelp; 164 break; 165 case OPT_OUT: 166 outfile = opt_arg(); 167 break; 168 case OPT_ENCRYPT: 169 operation = SMIME_ENCRYPT; 170 break; 171 case OPT_DECRYPT: 172 operation = SMIME_DECRYPT; 173 break; 174 case OPT_SIGN: 175 operation = SMIME_SIGN; 176 break; 177 case OPT_RESIGN: 178 operation = SMIME_RESIGN; 179 break; 180 case OPT_VERIFY: 181 operation = SMIME_VERIFY; 182 break; 183 case OPT_PK7OUT: 184 operation = SMIME_PK7OUT; 185 break; 186 case OPT_TEXT: 187 flags |= PKCS7_TEXT; 188 break; 189 case OPT_NOINTERN: 190 flags |= PKCS7_NOINTERN; 191 break; 192 case OPT_NOVERIFY: 193 flags |= PKCS7_NOVERIFY; 194 break; 195 case OPT_NOCHAIN: 196 flags |= PKCS7_NOCHAIN; 197 break; 198 case OPT_NOCERTS: 199 flags |= PKCS7_NOCERTS; 200 break; 201 case OPT_NOATTR: 202 flags |= PKCS7_NOATTR; 203 break; 204 case OPT_NODETACH: 205 flags &= ~PKCS7_DETACHED; 206 break; 207 case OPT_NOSMIMECAP: 208 flags |= PKCS7_NOSMIMECAP; 209 break; 210 case OPT_BINARY: 211 flags |= PKCS7_BINARY; 212 break; 213 case OPT_NOSIGS: 214 flags |= PKCS7_NOSIGS; 215 break; 216 case OPT_STREAM: 217 case OPT_INDEF: 218 indef = 1; 219 break; 220 case OPT_NOINDEF: 221 indef = 0; 222 break; 223 case OPT_CRLFEOL: 224 flags |= PKCS7_CRLFEOL; 225 mime_eol = "\r\n"; 226 break; 227 case OPT_RAND: 228 inrand = opt_arg(); 229 need_rand = 1; 230 break; 231 case OPT_ENGINE: 232 e = setup_engine(opt_arg(), 0); 233 break; 234 case OPT_PASSIN: 235 passinarg = opt_arg(); 236 break; 237 case OPT_TO: 238 to = opt_arg(); 239 break; 240 case OPT_FROM: 241 from = opt_arg(); 242 break; 243 case OPT_SUBJECT: 244 subject = opt_arg(); 245 break; 246 case OPT_SIGNER: 247 /* If previous -signer argument add signer to list */ 248 if (signerfile) { 249 if (sksigners == NULL 250 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) 251 goto end; 252 sk_OPENSSL_STRING_push(sksigners, signerfile); 253 if (keyfile == NULL) 254 keyfile = signerfile; 255 if (skkeys == NULL 256 && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) 257 goto end; 258 sk_OPENSSL_STRING_push(skkeys, keyfile); 259 keyfile = NULL; 260 } 261 signerfile = opt_arg(); 262 break; 263 case OPT_RECIP: 264 recipfile = opt_arg(); 265 break; 266 case OPT_MD: 267 if (!opt_md(opt_arg(), &sign_md)) 268 goto opthelp; 269 break; 270 case OPT_CIPHER: 271 if (!opt_cipher(opt_unknown(), &cipher)) 272 goto opthelp; 273 break; 274 case OPT_INKEY: 275 /* If previous -inkey argument add signer to list */ 276 if (keyfile) { 277 if (signerfile == NULL) { 278 BIO_printf(bio_err, 279 "%s: Must have -signer before -inkey\n", prog); 280 goto opthelp; 281 } 282 if (sksigners == NULL 283 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) 284 goto end; 285 sk_OPENSSL_STRING_push(sksigners, signerfile); 286 signerfile = NULL; 287 if (skkeys == NULL 288 && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) 289 goto end; 290 sk_OPENSSL_STRING_push(skkeys, keyfile); 291 } 292 keyfile = opt_arg(); 293 break; 294 case OPT_KEYFORM: 295 if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform)) 296 goto opthelp; 297 break; 298 case OPT_CERTFILE: 299 certfile = opt_arg(); 300 break; 301 case OPT_CAFILE: 302 CAfile = opt_arg(); 303 break; 304 case OPT_CAPATH: 305 CApath = opt_arg(); 306 break; 307 case OPT_NOCAFILE: 308 noCAfile = 1; 309 break; 310 case OPT_NOCAPATH: 311 noCApath = 1; 312 break; 313 case OPT_CONTENT: 314 contfile = opt_arg(); 315 break; 316 case OPT_V_CASES: 317 if (!opt_verify(o, vpm)) 318 goto opthelp; 319 vpmtouched++; 320 break; 321 } 322 } 323 argc = opt_num_rest(); 324 argv = opt_rest(); 325 326 if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) { 327 BIO_puts(bio_err, "Multiple signers or keys not allowed\n"); 328 goto opthelp; 329 } 330 331 if (operation & SMIME_SIGNERS) { 332 /* Check to see if any final signer needs to be appended */ 333 if (keyfile && !signerfile) { 334 BIO_puts(bio_err, "Illegal -inkey without -signer\n"); 335 goto opthelp; 336 } 337 if (signerfile) { 338 if (!sksigners 339 && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL) 340 goto end; 341 sk_OPENSSL_STRING_push(sksigners, signerfile); 342 if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL) 343 goto end; 344 if (!keyfile) 345 keyfile = signerfile; 346 sk_OPENSSL_STRING_push(skkeys, keyfile); 347 } 348 if (!sksigners) { 349 BIO_printf(bio_err, "No signer certificate specified\n"); 350 goto opthelp; 351 } 352 signerfile = NULL; 353 keyfile = NULL; 354 need_rand = 1; 355 } else if (operation == SMIME_DECRYPT) { 356 if (!recipfile && !keyfile) { 357 BIO_printf(bio_err, 358 "No recipient certificate or key specified\n"); 359 goto opthelp; 360 } 361 } else if (operation == SMIME_ENCRYPT) { 362 if (argc == 0) { 363 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n"); 364 goto opthelp; 365 } 366 need_rand = 1; 367 } else if (!operation) 368 goto opthelp; 369 370 if (!app_passwd(passinarg, NULL, &passin, NULL)) { 371 BIO_printf(bio_err, "Error getting password\n"); 372 goto end; 373 } 374 375 if (need_rand) { 376 app_RAND_load_file(NULL, (inrand != NULL)); 377 if (inrand != NULL) 378 BIO_printf(bio_err, "%ld semi-random bytes loaded\n", 379 app_RAND_load_files(inrand)); 380 } 381 382 ret = 2; 383 384 if (!(operation & SMIME_SIGNERS)) 385 flags &= ~PKCS7_DETACHED; 386 387 if (!(operation & SMIME_OP)) { 388 if (flags & PKCS7_BINARY) 389 outformat = FORMAT_BINARY; 390 } 391 392 if (!(operation & SMIME_IP)) { 393 if (flags & PKCS7_BINARY) 394 informat = FORMAT_BINARY; 395 } 396 397 if (operation == SMIME_ENCRYPT) { 398 if (!cipher) { 399 #ifndef OPENSSL_NO_DES 400 cipher = EVP_des_ede3_cbc(); 401 #else 402 BIO_printf(bio_err, "No cipher selected\n"); 403 goto end; 404 #endif 405 } 406 encerts = sk_X509_new_null(); 407 if (!encerts) 408 goto end; 409 while (*argv) { 410 cert = load_cert(*argv, FORMAT_PEM, 411 "recipient certificate file"); 412 if (cert == NULL) 413 goto end; 414 sk_X509_push(encerts, cert); 415 cert = NULL; 416 argv++; 417 } 418 } 419 420 if (certfile) { 421 if (!load_certs(certfile, &other, FORMAT_PEM, NULL, 422 "certificate file")) { 423 ERR_print_errors(bio_err); 424 goto end; 425 } 426 } 427 428 if (recipfile && (operation == SMIME_DECRYPT)) { 429 if ((recip = load_cert(recipfile, FORMAT_PEM, 430 "recipient certificate file")) == NULL) { 431 ERR_print_errors(bio_err); 432 goto end; 433 } 434 } 435 436 if (operation == SMIME_DECRYPT) { 437 if (!keyfile) 438 keyfile = recipfile; 439 } else if (operation == SMIME_SIGN) { 440 if (!keyfile) 441 keyfile = signerfile; 442 } else 443 keyfile = NULL; 444 445 if (keyfile) { 446 key = load_key(keyfile, keyform, 0, passin, e, "signing key file"); 447 if (!key) 448 goto end; 449 } 450 451 in = bio_open_default(infile, 'r', informat); 452 if (in == NULL) 453 goto end; 454 455 if (operation & SMIME_IP) { 456 if (informat == FORMAT_SMIME) 457 p7 = SMIME_read_PKCS7(in, &indata); 458 else if (informat == FORMAT_PEM) 459 p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL); 460 else if (informat == FORMAT_ASN1) 461 p7 = d2i_PKCS7_bio(in, NULL); 462 else { 463 BIO_printf(bio_err, "Bad input format for PKCS#7 file\n"); 464 goto end; 465 } 466 467 if (!p7) { 468 BIO_printf(bio_err, "Error reading S/MIME message\n"); 469 goto end; 470 } 471 if (contfile) { 472 BIO_free(indata); 473 if ((indata = BIO_new_file(contfile, "rb")) == NULL) { 474 BIO_printf(bio_err, "Can't read content file %s\n", contfile); 475 goto end; 476 } 477 } 478 } 479 480 out = bio_open_default(outfile, 'w', outformat); 481 if (out == NULL) 482 goto end; 483 484 if (operation == SMIME_VERIFY) { 485 if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL) 486 goto end; 487 X509_STORE_set_verify_cb(store, smime_cb); 488 if (vpmtouched) 489 X509_STORE_set1_param(store, vpm); 490 } 491 492 ret = 3; 493 494 if (operation == SMIME_ENCRYPT) { 495 if (indef) 496 flags |= PKCS7_STREAM; 497 p7 = PKCS7_encrypt(encerts, in, cipher, flags); 498 } else if (operation & SMIME_SIGNERS) { 499 int i; 500 /* 501 * If detached data content we only enable streaming if S/MIME output 502 * format. 503 */ 504 if (operation == SMIME_SIGN) { 505 if (flags & PKCS7_DETACHED) { 506 if (outformat == FORMAT_SMIME) 507 flags |= PKCS7_STREAM; 508 } else if (indef) 509 flags |= PKCS7_STREAM; 510 flags |= PKCS7_PARTIAL; 511 p7 = PKCS7_sign(NULL, NULL, other, in, flags); 512 if (!p7) 513 goto end; 514 if (flags & PKCS7_NOCERTS) { 515 for (i = 0; i < sk_X509_num(other); i++) { 516 X509 *x = sk_X509_value(other, i); 517 PKCS7_add_certificate(p7, x); 518 } 519 } 520 } else 521 flags |= PKCS7_REUSE_DIGEST; 522 for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) { 523 signerfile = sk_OPENSSL_STRING_value(sksigners, i); 524 keyfile = sk_OPENSSL_STRING_value(skkeys, i); 525 signer = load_cert(signerfile, FORMAT_PEM, 526 "signer certificate"); 527 if (!signer) 528 goto end; 529 key = load_key(keyfile, keyform, 0, passin, e, "signing key file"); 530 if (!key) 531 goto end; 532 if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags)) 533 goto end; 534 X509_free(signer); 535 signer = NULL; 536 EVP_PKEY_free(key); 537 key = NULL; 538 } 539 /* If not streaming or resigning finalize structure */ 540 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) { 541 if (!PKCS7_final(p7, in, flags)) 542 goto end; 543 } 544 } 545 546 if (!p7) { 547 BIO_printf(bio_err, "Error creating PKCS#7 structure\n"); 548 goto end; 549 } 550 551 ret = 4; 552 if (operation == SMIME_DECRYPT) { 553 if (!PKCS7_decrypt(p7, key, recip, out, flags)) { 554 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n"); 555 goto end; 556 } 557 } else if (operation == SMIME_VERIFY) { 558 STACK_OF(X509) *signers; 559 if (PKCS7_verify(p7, other, store, indata, out, flags)) 560 BIO_printf(bio_err, "Verification successful\n"); 561 else { 562 BIO_printf(bio_err, "Verification failure\n"); 563 goto end; 564 } 565 signers = PKCS7_get0_signers(p7, other, flags); 566 if (!save_certs(signerfile, signers)) { 567 BIO_printf(bio_err, "Error writing signers to %s\n", signerfile); 568 ret = 5; 569 goto end; 570 } 571 sk_X509_free(signers); 572 } else if (operation == SMIME_PK7OUT) 573 PEM_write_bio_PKCS7(out, p7); 574 else { 575 if (to) 576 BIO_printf(out, "To: %s%s", to, mime_eol); 577 if (from) 578 BIO_printf(out, "From: %s%s", from, mime_eol); 579 if (subject) 580 BIO_printf(out, "Subject: %s%s", subject, mime_eol); 581 if (outformat == FORMAT_SMIME) { 582 if (operation == SMIME_RESIGN) 583 rv = SMIME_write_PKCS7(out, p7, indata, flags); 584 else 585 rv = SMIME_write_PKCS7(out, p7, in, flags); 586 } else if (outformat == FORMAT_PEM) 587 rv = PEM_write_bio_PKCS7_stream(out, p7, in, flags); 588 else if (outformat == FORMAT_ASN1) 589 rv = i2d_PKCS7_bio_stream(out, p7, in, flags); 590 else { 591 BIO_printf(bio_err, "Bad output format for PKCS#7 file\n"); 592 goto end; 593 } 594 if (rv == 0) { 595 BIO_printf(bio_err, "Error writing output\n"); 596 ret = 3; 597 goto end; 598 } 599 } 600 ret = 0; 601 end: 602 if (need_rand) 603 app_RAND_write_file(NULL); 604 if (ret) 605 ERR_print_errors(bio_err); 606 sk_X509_pop_free(encerts, X509_free); 607 sk_X509_pop_free(other, X509_free); 608 X509_VERIFY_PARAM_free(vpm); 609 sk_OPENSSL_STRING_free(sksigners); 610 sk_OPENSSL_STRING_free(skkeys); 611 X509_STORE_free(store); 612 X509_free(cert); 613 X509_free(recip); 614 X509_free(signer); 615 EVP_PKEY_free(key); 616 PKCS7_free(p7); 617 release_engine(e); 618 BIO_free(in); 619 BIO_free(indata); 620 BIO_free_all(out); 621 OPENSSL_free(passin); 622 return (ret); 623 } 624 625 static int save_certs(char *signerfile, STACK_OF(X509) *signers) 626 { 627 int i; 628 BIO *tmp; 629 if (!signerfile) 630 return 1; 631 tmp = BIO_new_file(signerfile, "w"); 632 if (!tmp) 633 return 0; 634 for (i = 0; i < sk_X509_num(signers); i++) 635 PEM_write_bio_X509(tmp, sk_X509_value(signers, i)); 636 BIO_free(tmp); 637 return 1; 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 int error; 645 646 error = X509_STORE_CTX_get_error(ctx); 647 648 if ((error != X509_V_ERR_NO_EXPLICIT_POLICY) 649 && ((error != X509_V_OK) || (ok != 2))) 650 return ok; 651 652 policies_print(ctx); 653 654 return ok; 655 656 } 657