1 /* $OpenBSD: ocsp.c,v 1.15 2018/02/07 05:49:36 jsing Exp $ */ 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 2000. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1999 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 #ifndef OPENSSL_NO_OCSP 59 60 #include <sys/types.h> 61 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <limits.h> 65 #include <string.h> 66 #include <poll.h> 67 #include <time.h> 68 69 /* Needs to be included before the openssl headers! */ 70 #include "apps.h" 71 72 #include <openssl/bn.h> 73 #include <openssl/crypto.h> 74 #include <openssl/err.h> 75 #include <openssl/evp.h> 76 #include <openssl/ssl.h> 77 #include <openssl/x509v3.h> 78 79 /* Maximum leeway in validity period: default 5 minutes */ 80 #define MAX_VALIDITY_PERIOD (5 * 60) 81 82 static int 83 add_ocsp_cert(OCSP_REQUEST ** req, X509 * cert, const EVP_MD * cert_id_md, X509 * issuer, 84 STACK_OF(OCSP_CERTID) * ids); 85 static int add_ocsp_serial(OCSP_REQUEST ** req, char *serial, const EVP_MD * cert_id_md, X509 * issuer, 86 STACK_OF(OCSP_CERTID) * ids); 87 static int print_ocsp_summary(BIO * out, OCSP_BASICRESP * bs, OCSP_REQUEST * req, 88 STACK_OF(OPENSSL_STRING) * names, 89 STACK_OF(OCSP_CERTID) * ids, long nsec, 90 long maxage); 91 92 static int make_ocsp_response(OCSP_RESPONSE ** resp, OCSP_REQUEST * req, CA_DB * db, 93 X509 * ca, X509 * rcert, EVP_PKEY * rkey, 94 STACK_OF(X509) * rother, unsigned long flags, 95 int nmin, int ndays); 96 97 static char **lookup_serial(CA_DB * db, ASN1_INTEGER * ser); 98 static BIO *init_responder(char *port); 99 static int do_responder(OCSP_REQUEST ** preq, BIO ** pcbio, BIO * acbio, char *port); 100 static int send_ocsp_response(BIO * cbio, OCSP_RESPONSE * resp); 101 static OCSP_RESPONSE *query_responder(BIO * err, BIO * cbio, char *path, 102 STACK_OF(CONF_VALUE) * headers, 103 OCSP_REQUEST * req, int req_timeout); 104 105 int 106 ocsp_main(int argc, char **argv) 107 { 108 char **args; 109 char *host = NULL, *port = NULL, *path = NULL; 110 char *reqin = NULL, *respin = NULL; 111 char *reqout = NULL, *respout = NULL; 112 char *signfile = NULL, *keyfile = NULL; 113 char *rsignfile = NULL, *rkeyfile = NULL; 114 char *outfile = NULL; 115 int add_nonce = 1, noverify = 0, use_ssl = -1; 116 STACK_OF(CONF_VALUE) * headers = NULL; 117 OCSP_REQUEST *req = NULL; 118 OCSP_RESPONSE *resp = NULL; 119 OCSP_BASICRESP *bs = NULL; 120 X509 *issuer = NULL, *cert = NULL; 121 X509 *signer = NULL, *rsigner = NULL; 122 EVP_PKEY *key = NULL, *rkey = NULL; 123 BIO *acbio = NULL, *cbio = NULL; 124 BIO *derbio = NULL; 125 BIO *out = NULL; 126 int req_timeout = -1; 127 int req_text = 0, resp_text = 0; 128 long nsec = MAX_VALIDITY_PERIOD, maxage = -1; 129 char *CAfile = NULL, *CApath = NULL; 130 X509_STORE *store = NULL; 131 STACK_OF(X509) * sign_other = NULL, *verify_other = NULL, *rother = NULL; 132 char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL; 133 unsigned long sign_flags = 0, verify_flags = 0, rflags = 0; 134 int ret = 1; 135 int accept_count = -1; 136 int badarg = 0; 137 int i; 138 int ignore_err = 0; 139 STACK_OF(OPENSSL_STRING) * reqnames = NULL; 140 STACK_OF(OCSP_CERTID) * ids = NULL; 141 X509 *rca_cert = NULL; 142 char *ridx_filename = NULL; 143 char *rca_filename = NULL; 144 CA_DB *rdb = NULL; 145 int nmin = 0, ndays = -1; 146 const EVP_MD *cert_id_md = NULL; 147 const char *errstr = NULL; 148 149 if (single_execution) { 150 if (pledge("stdio cpath wpath rpath inet dns tty", NULL) == -1) { 151 perror("pledge"); 152 exit(1); 153 } 154 } 155 156 args = argv + 1; 157 reqnames = sk_OPENSSL_STRING_new_null(); 158 ids = sk_OCSP_CERTID_new_null(); 159 while (!badarg && *args && *args[0] == '-') { 160 if (!strcmp(*args, "-out")) { 161 if (args[1]) { 162 args++; 163 outfile = *args; 164 } else 165 badarg = 1; 166 } else if (!strcmp(*args, "-timeout")) { 167 if (args[1]) { 168 args++; 169 req_timeout = strtonum(*args, 0, 170 INT_MAX, &errstr); 171 if (errstr) { 172 BIO_printf(bio_err, 173 "Illegal timeout value %s: %s\n", 174 *args, errstr); 175 badarg = 1; 176 } 177 } else 178 badarg = 1; 179 } else if (!strcmp(*args, "-url")) { 180 if (args[1] && host == NULL && port == NULL && 181 path == NULL) { 182 args++; 183 if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl)) { 184 BIO_printf(bio_err, "Error parsing URL\n"); 185 badarg = 1; 186 } 187 } else 188 badarg = 1; 189 } else if (!strcmp(*args, "-host")) { 190 if (args[1] && use_ssl == -1) { 191 args++; 192 host = *args; 193 } else 194 badarg = 1; 195 } else if (!strcmp(*args, "-port")) { 196 if (args[1] && use_ssl == -1) { 197 args++; 198 port = *args; 199 } else 200 badarg = 1; 201 } else if (!strcmp(*args, "-header")) { 202 if (args[1] && args[2]) { 203 if (!X509V3_add_value(args[1], args[2], &headers)) 204 goto end; 205 args += 2; 206 } else 207 badarg = 1; 208 } else if (!strcmp(*args, "-ignore_err")) 209 ignore_err = 1; 210 else if (!strcmp(*args, "-noverify")) 211 noverify = 1; 212 else if (!strcmp(*args, "-nonce")) 213 add_nonce = 2; 214 else if (!strcmp(*args, "-no_nonce")) 215 add_nonce = 0; 216 else if (!strcmp(*args, "-resp_no_certs")) 217 rflags |= OCSP_NOCERTS; 218 else if (!strcmp(*args, "-resp_key_id")) 219 rflags |= OCSP_RESPID_KEY; 220 else if (!strcmp(*args, "-no_certs")) 221 sign_flags |= OCSP_NOCERTS; 222 else if (!strcmp(*args, "-no_signature_verify")) 223 verify_flags |= OCSP_NOSIGS; 224 else if (!strcmp(*args, "-no_cert_verify")) 225 verify_flags |= OCSP_NOVERIFY; 226 else if (!strcmp(*args, "-no_chain")) 227 verify_flags |= OCSP_NOCHAIN; 228 else if (!strcmp(*args, "-no_cert_checks")) 229 verify_flags |= OCSP_NOCHECKS; 230 else if (!strcmp(*args, "-no_explicit")) 231 verify_flags |= OCSP_NOEXPLICIT; 232 else if (!strcmp(*args, "-trust_other")) 233 verify_flags |= OCSP_TRUSTOTHER; 234 else if (!strcmp(*args, "-no_intern")) 235 verify_flags |= OCSP_NOINTERN; 236 else if (!strcmp(*args, "-text")) { 237 req_text = 1; 238 resp_text = 1; 239 } else if (!strcmp(*args, "-req_text")) 240 req_text = 1; 241 else if (!strcmp(*args, "-resp_text")) 242 resp_text = 1; 243 else if (!strcmp(*args, "-reqin")) { 244 if (args[1]) { 245 args++; 246 reqin = *args; 247 } else 248 badarg = 1; 249 } else if (!strcmp(*args, "-respin")) { 250 if (args[1]) { 251 args++; 252 respin = *args; 253 } else 254 badarg = 1; 255 } else if (!strcmp(*args, "-signer")) { 256 if (args[1]) { 257 args++; 258 signfile = *args; 259 } else 260 badarg = 1; 261 } else if (!strcmp(*args, "-VAfile")) { 262 if (args[1]) { 263 args++; 264 verify_certfile = *args; 265 verify_flags |= OCSP_TRUSTOTHER; 266 } else 267 badarg = 1; 268 } else if (!strcmp(*args, "-sign_other")) { 269 if (args[1]) { 270 args++; 271 sign_certfile = *args; 272 } else 273 badarg = 1; 274 } else if (!strcmp(*args, "-verify_other")) { 275 if (args[1]) { 276 args++; 277 verify_certfile = *args; 278 } else 279 badarg = 1; 280 } else if (!strcmp(*args, "-CAfile")) { 281 if (args[1]) { 282 args++; 283 CAfile = *args; 284 } else 285 badarg = 1; 286 } else if (!strcmp(*args, "-CApath")) { 287 if (args[1]) { 288 args++; 289 CApath = *args; 290 } else 291 badarg = 1; 292 } else if (!strcmp(*args, "-validity_period")) { 293 if (args[1]) { 294 args++; 295 nsec = strtonum(*args, 0, LONG_MAX, &errstr); 296 if (errstr) { 297 BIO_printf(bio_err, 298 "Illegal validity period %s: %s\n", 299 *args, errstr); 300 badarg = 1; 301 } 302 } else 303 badarg = 1; 304 } else if (!strcmp(*args, "-status_age")) { 305 if (args[1]) { 306 args++; 307 maxage = strtonum(*args, 0, LONG_MAX, &errstr); 308 if (errstr) { 309 BIO_printf(bio_err, 310 "Illegal validity age %s: %s\n", 311 *args, errstr); 312 badarg = 1; 313 } 314 } else 315 badarg = 1; 316 } else if (!strcmp(*args, "-signkey")) { 317 if (args[1]) { 318 args++; 319 keyfile = *args; 320 } else 321 badarg = 1; 322 } else if (!strcmp(*args, "-reqout")) { 323 if (args[1]) { 324 args++; 325 reqout = *args; 326 } else 327 badarg = 1; 328 } else if (!strcmp(*args, "-respout")) { 329 if (args[1]) { 330 args++; 331 respout = *args; 332 } else 333 badarg = 1; 334 } else if (!strcmp(*args, "-path")) { 335 if (args[1] && use_ssl == -1) { 336 args++; 337 path = *args; 338 } else 339 badarg = 1; 340 } else if (!strcmp(*args, "-issuer")) { 341 if (args[1]) { 342 args++; 343 X509_free(issuer); 344 issuer = load_cert(bio_err, *args, FORMAT_PEM, 345 NULL, "issuer certificate"); 346 if (!issuer) 347 goto end; 348 } else 349 badarg = 1; 350 } else if (!strcmp(*args, "-cert")) { 351 if (args[1]) { 352 args++; 353 X509_free(cert); 354 cert = load_cert(bio_err, *args, FORMAT_PEM, 355 NULL, "certificate"); 356 if (!cert) 357 goto end; 358 if (!cert_id_md) 359 cert_id_md = EVP_sha1(); 360 if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids)) 361 goto end; 362 if (!sk_OPENSSL_STRING_push(reqnames, *args)) 363 goto end; 364 } else 365 badarg = 1; 366 } else if (!strcmp(*args, "-serial")) { 367 if (args[1]) { 368 args++; 369 if (!cert_id_md) 370 cert_id_md = EVP_sha1(); 371 if (!add_ocsp_serial(&req, *args, cert_id_md, issuer, ids)) 372 goto end; 373 if (!sk_OPENSSL_STRING_push(reqnames, *args)) 374 goto end; 375 } else 376 badarg = 1; 377 } else if (!strcmp(*args, "-index")) { 378 if (args[1]) { 379 args++; 380 ridx_filename = *args; 381 } else 382 badarg = 1; 383 } else if (!strcmp(*args, "-CA")) { 384 if (args[1]) { 385 args++; 386 rca_filename = *args; 387 } else 388 badarg = 1; 389 } else if (!strcmp(*args, "-nmin")) { 390 if (args[1]) { 391 args++; 392 nmin = strtonum(*args, 0, INT_MAX, &errstr); 393 if (errstr) { 394 BIO_printf(bio_err, 395 "Illegal update period %s: %s\n", 396 *args, errstr); 397 badarg = 1; 398 } 399 } 400 if (ndays == -1) 401 ndays = 0; 402 else 403 badarg = 1; 404 } else if (!strcmp(*args, "-nrequest")) { 405 if (args[1]) { 406 args++; 407 accept_count = strtonum(*args, 0, INT_MAX, &errstr); 408 if (errstr) { 409 BIO_printf(bio_err, 410 "Illegal accept count %s: %s\n", 411 *args, errstr); 412 badarg = 1; 413 } 414 } else 415 badarg = 1; 416 } else if (!strcmp(*args, "-ndays")) { 417 if (args[1]) { 418 args++; 419 ndays = strtonum(*args, 0, INT_MAX, &errstr); 420 if (errstr) { 421 BIO_printf(bio_err, 422 "Illegal update period %s: %s\n", 423 *args, errstr); 424 badarg = 1; 425 } 426 } else 427 badarg = 1; 428 } else if (!strcmp(*args, "-rsigner")) { 429 if (args[1]) { 430 args++; 431 rsignfile = *args; 432 } else 433 badarg = 1; 434 } else if (!strcmp(*args, "-rkey")) { 435 if (args[1]) { 436 args++; 437 rkeyfile = *args; 438 } else 439 badarg = 1; 440 } else if (!strcmp(*args, "-rother")) { 441 if (args[1]) { 442 args++; 443 rcertfile = *args; 444 } else 445 badarg = 1; 446 } else if ((cert_id_md = EVP_get_digestbyname((*args) + 1)) == NULL) { 447 badarg = 1; 448 } 449 args++; 450 } 451 452 /* Have we anything to do? */ 453 if (!req && !reqin && !respin && !(port && ridx_filename)) 454 badarg = 1; 455 456 if (badarg) { 457 BIO_printf(bio_err, "OCSP utility\n"); 458 BIO_printf(bio_err, "Usage ocsp [options]\n"); 459 BIO_printf(bio_err, "where options are\n"); 460 BIO_printf(bio_err, "-out file output filename\n"); 461 BIO_printf(bio_err, "-issuer file issuer certificate\n"); 462 BIO_printf(bio_err, "-cert file certificate to check\n"); 463 BIO_printf(bio_err, "-serial n serial number to check\n"); 464 BIO_printf(bio_err, "-signer file certificate to sign OCSP request with\n"); 465 BIO_printf(bio_err, "-signkey file private key to sign OCSP request with\n"); 466 BIO_printf(bio_err, "-sign_other file additional certificates to include in signed request\n"); 467 BIO_printf(bio_err, "-no_certs don't include any certificates in signed request\n"); 468 BIO_printf(bio_err, "-req_text print text form of request\n"); 469 BIO_printf(bio_err, "-resp_text print text form of response\n"); 470 BIO_printf(bio_err, "-text print text form of request and response\n"); 471 BIO_printf(bio_err, "-reqout file write DER encoded OCSP request to \"file\"\n"); 472 BIO_printf(bio_err, "-respout file write DER encoded OCSP reponse to \"file\"\n"); 473 BIO_printf(bio_err, "-reqin file read DER encoded OCSP request from \"file\"\n"); 474 BIO_printf(bio_err, "-respin file read DER encoded OCSP reponse from \"file\"\n"); 475 BIO_printf(bio_err, "-nonce add OCSP nonce to request\n"); 476 BIO_printf(bio_err, "-no_nonce don't add OCSP nonce to request\n"); 477 BIO_printf(bio_err, "-url URL OCSP responder URL\n"); 478 BIO_printf(bio_err, "-host host:n send OCSP request to host on port n\n"); 479 BIO_printf(bio_err, "-path path to use in OCSP request\n"); 480 BIO_printf(bio_err, "-CApath dir trusted certificates directory\n"); 481 BIO_printf(bio_err, "-CAfile file trusted certificates file\n"); 482 BIO_printf(bio_err, "-VAfile file validator certificates file\n"); 483 BIO_printf(bio_err, "-validity_period n maximum validity discrepancy in seconds\n"); 484 BIO_printf(bio_err, "-status_age n maximum status age in seconds\n"); 485 BIO_printf(bio_err, "-noverify don't verify response at all\n"); 486 BIO_printf(bio_err, "-verify_other file additional certificates to search for signer\n"); 487 BIO_printf(bio_err, "-trust_other don't verify additional certificates\n"); 488 BIO_printf(bio_err, "-no_intern don't search certificates contained in response for signer\n"); 489 BIO_printf(bio_err, "-no_signature_verify don't check signature on response\n"); 490 BIO_printf(bio_err, "-no_cert_verify don't check signing certificate\n"); 491 BIO_printf(bio_err, "-no_chain don't chain verify response\n"); 492 BIO_printf(bio_err, "-no_cert_checks don't do additional checks on signing certificate\n"); 493 BIO_printf(bio_err, "-port num port to run responder on\n"); 494 BIO_printf(bio_err, "-index file certificate status index file\n"); 495 BIO_printf(bio_err, "-CA file CA certificate\n"); 496 BIO_printf(bio_err, "-rsigner file responder certificate to sign responses with\n"); 497 BIO_printf(bio_err, "-rkey file responder key to sign responses with\n"); 498 BIO_printf(bio_err, "-rother file other certificates to include in response\n"); 499 BIO_printf(bio_err, "-resp_no_certs don't include any certificates in response\n"); 500 BIO_printf(bio_err, "-nmin n number of minutes before next update\n"); 501 BIO_printf(bio_err, "-ndays n number of days before next update\n"); 502 BIO_printf(bio_err, "-resp_key_id identify reponse by signing certificate key ID\n"); 503 BIO_printf(bio_err, "-nrequest n number of requests to accept (default unlimited)\n"); 504 BIO_printf(bio_err, "-<dgst alg> use specified digest in the request\n"); 505 goto end; 506 } 507 if (outfile) 508 out = BIO_new_file(outfile, "w"); 509 else 510 out = BIO_new_fp(stdout, BIO_NOCLOSE); 511 512 if (!out) { 513 BIO_printf(bio_err, "Error opening output file\n"); 514 goto end; 515 } 516 if (!req && (add_nonce != 2)) 517 add_nonce = 0; 518 519 if (!req && reqin) { 520 derbio = BIO_new_file(reqin, "rb"); 521 if (!derbio) { 522 BIO_printf(bio_err, "Error Opening OCSP request file\n"); 523 goto end; 524 } 525 req = d2i_OCSP_REQUEST_bio(derbio, NULL); 526 BIO_free(derbio); 527 if (!req) { 528 BIO_printf(bio_err, "Error reading OCSP request\n"); 529 goto end; 530 } 531 } 532 if (!req && port) { 533 acbio = init_responder(port); 534 if (!acbio) 535 goto end; 536 } 537 if (rsignfile && !rdb) { 538 if (!rkeyfile) 539 rkeyfile = rsignfile; 540 rsigner = load_cert(bio_err, rsignfile, FORMAT_PEM, 541 NULL, "responder certificate"); 542 if (!rsigner) { 543 BIO_printf(bio_err, "Error loading responder certificate\n"); 544 goto end; 545 } 546 rca_cert = load_cert(bio_err, rca_filename, FORMAT_PEM, 547 NULL, "CA certificate"); 548 if (rcertfile) { 549 rother = load_certs(bio_err, rcertfile, FORMAT_PEM, 550 NULL, "responder other certificates"); 551 if (!rother) 552 goto end; 553 } 554 rkey = load_key(bio_err, rkeyfile, FORMAT_PEM, 0, NULL, 555 "responder private key"); 556 if (!rkey) 557 goto end; 558 } 559 if (acbio) 560 BIO_printf(bio_err, "Waiting for OCSP client connections...\n"); 561 562 redo_accept: 563 564 if (acbio) { 565 if (!do_responder(&req, &cbio, acbio, port)) 566 goto end; 567 if (!req) { 568 resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL); 569 send_ocsp_response(cbio, resp); 570 goto done_resp; 571 } 572 } 573 if (!req && (signfile || reqout || host || add_nonce || ridx_filename)) { 574 BIO_printf(bio_err, "Need an OCSP request for this operation!\n"); 575 goto end; 576 } 577 if (req && add_nonce) 578 OCSP_request_add1_nonce(req, NULL, -1); 579 580 if (signfile) { 581 if (!keyfile) 582 keyfile = signfile; 583 signer = load_cert(bio_err, signfile, FORMAT_PEM, 584 NULL, "signer certificate"); 585 if (!signer) { 586 BIO_printf(bio_err, "Error loading signer certificate\n"); 587 goto end; 588 } 589 if (sign_certfile) { 590 sign_other = load_certs(bio_err, sign_certfile, FORMAT_PEM, 591 NULL, "signer certificates"); 592 if (!sign_other) 593 goto end; 594 } 595 key = load_key(bio_err, keyfile, FORMAT_PEM, 0, NULL, 596 "signer private key"); 597 if (!key) 598 goto end; 599 600 if (!OCSP_request_sign(req, signer, key, NULL, sign_other, sign_flags)) { 601 BIO_printf(bio_err, "Error signing OCSP request\n"); 602 goto end; 603 } 604 } 605 if (req_text && req) 606 OCSP_REQUEST_print(out, req, 0); 607 608 if (reqout) { 609 derbio = BIO_new_file(reqout, "wb"); 610 if (!derbio) { 611 BIO_printf(bio_err, "Error opening file %s\n", reqout); 612 goto end; 613 } 614 i2d_OCSP_REQUEST_bio(derbio, req); 615 BIO_free(derbio); 616 } 617 if (ridx_filename && (!rkey || !rsigner || !rca_cert)) { 618 BIO_printf(bio_err, "Need a responder certificate, key and CA for this operation!\n"); 619 goto end; 620 } 621 if (ridx_filename && !rdb) { 622 rdb = load_index(ridx_filename, NULL); 623 if (!rdb) 624 goto end; 625 if (!index_index(rdb)) 626 goto end; 627 } 628 if (rdb) { 629 i = make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey, rother, rflags, nmin, ndays); 630 if (cbio) 631 send_ocsp_response(cbio, resp); 632 } else if (host) { 633 resp = process_responder(bio_err, req, host, path ? path : "/", 634 port, use_ssl, headers, req_timeout); 635 if (!resp) 636 goto end; 637 } else if (respin) { 638 derbio = BIO_new_file(respin, "rb"); 639 if (!derbio) { 640 BIO_printf(bio_err, "Error Opening OCSP response file\n"); 641 goto end; 642 } 643 resp = d2i_OCSP_RESPONSE_bio(derbio, NULL); 644 BIO_free(derbio); 645 if (!resp) { 646 BIO_printf(bio_err, "Error reading OCSP response\n"); 647 goto end; 648 } 649 } else { 650 ret = 0; 651 goto end; 652 } 653 654 done_resp: 655 656 if (respout) { 657 derbio = BIO_new_file(respout, "wb"); 658 if (!derbio) { 659 BIO_printf(bio_err, "Error opening file %s\n", respout); 660 goto end; 661 } 662 i2d_OCSP_RESPONSE_bio(derbio, resp); 663 BIO_free(derbio); 664 } 665 i = OCSP_response_status(resp); 666 667 if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) { 668 BIO_printf(bio_err, "Responder Error: %s (%d)\n", 669 OCSP_response_status_str(i), i); 670 if (ignore_err) 671 goto redo_accept; 672 ret = 1; 673 goto end; 674 } 675 if (resp_text) 676 OCSP_RESPONSE_print(out, resp, 0); 677 678 /* If running as responder don't verify our own response */ 679 if (cbio) { 680 if (accept_count > 0) 681 accept_count--; 682 /* Redo if more connections needed */ 683 if (accept_count) { 684 BIO_free_all(cbio); 685 cbio = NULL; 686 OCSP_REQUEST_free(req); 687 req = NULL; 688 OCSP_RESPONSE_free(resp); 689 resp = NULL; 690 goto redo_accept; 691 } 692 goto end; 693 } 694 if (!store) 695 store = setup_verify(bio_err, CAfile, CApath); 696 if (!store) 697 goto end; 698 if (verify_certfile) { 699 verify_other = load_certs(bio_err, verify_certfile, FORMAT_PEM, 700 NULL, "validator certificate"); 701 if (!verify_other) 702 goto end; 703 } 704 bs = OCSP_response_get1_basic(resp); 705 706 if (!bs) { 707 BIO_printf(bio_err, "Error parsing response\n"); 708 goto end; 709 } 710 if (!noverify) { 711 if (req && ((i = OCSP_check_nonce(req, bs)) <= 0)) { 712 if (i == -1) 713 BIO_printf(bio_err, "WARNING: no nonce in response\n"); 714 else { 715 BIO_printf(bio_err, "Nonce Verify error\n"); 716 goto end; 717 } 718 } 719 i = OCSP_basic_verify(bs, verify_other, store, verify_flags); 720 if (i < 0) 721 i = OCSP_basic_verify(bs, NULL, store, 0); 722 723 if (i <= 0) { 724 BIO_printf(bio_err, "Response Verify Failure\n"); 725 ERR_print_errors(bio_err); 726 } else 727 BIO_printf(bio_err, "Response verify OK\n"); 728 729 } 730 if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage)) 731 goto end; 732 733 ret = 0; 734 735 end: 736 ERR_print_errors(bio_err); 737 X509_free(signer); 738 X509_STORE_free(store); 739 EVP_PKEY_free(key); 740 EVP_PKEY_free(rkey); 741 X509_free(issuer); 742 X509_free(cert); 743 X509_free(rsigner); 744 X509_free(rca_cert); 745 free_index(rdb); 746 BIO_free_all(cbio); 747 BIO_free_all(acbio); 748 BIO_free(out); 749 OCSP_REQUEST_free(req); 750 OCSP_RESPONSE_free(resp); 751 OCSP_BASICRESP_free(bs); 752 sk_OPENSSL_STRING_free(reqnames); 753 sk_OCSP_CERTID_free(ids); 754 sk_X509_pop_free(sign_other, X509_free); 755 sk_X509_pop_free(verify_other, X509_free); 756 sk_CONF_VALUE_pop_free(headers, X509V3_conf_free); 757 758 if (use_ssl != -1) { 759 free(host); 760 free(port); 761 free(path); 762 } 763 return (ret); 764 } 765 766 static int 767 add_ocsp_cert(OCSP_REQUEST ** req, X509 * cert, const EVP_MD * cert_id_md, X509 * issuer, 768 STACK_OF(OCSP_CERTID) * ids) 769 { 770 OCSP_CERTID *id; 771 if (!issuer) { 772 BIO_printf(bio_err, "No issuer certificate specified\n"); 773 return 0; 774 } 775 if (!*req) 776 *req = OCSP_REQUEST_new(); 777 if (!*req) 778 goto err; 779 id = OCSP_cert_to_id(cert_id_md, cert, issuer); 780 if (!id || !sk_OCSP_CERTID_push(ids, id)) 781 goto err; 782 if (!OCSP_request_add0_id(*req, id)) 783 goto err; 784 return 1; 785 786 err: 787 BIO_printf(bio_err, "Error Creating OCSP request\n"); 788 return 0; 789 } 790 791 static int 792 add_ocsp_serial(OCSP_REQUEST ** req, char *serial, const EVP_MD * cert_id_md, X509 * issuer, 793 STACK_OF(OCSP_CERTID) * ids) 794 { 795 OCSP_CERTID *id; 796 X509_NAME *iname; 797 ASN1_BIT_STRING *ikey; 798 ASN1_INTEGER *sno; 799 if (!issuer) { 800 BIO_printf(bio_err, "No issuer certificate specified\n"); 801 return 0; 802 } 803 if (!*req) 804 *req = OCSP_REQUEST_new(); 805 if (!*req) 806 goto err; 807 iname = X509_get_subject_name(issuer); 808 ikey = X509_get0_pubkey_bitstr(issuer); 809 sno = s2i_ASN1_INTEGER(NULL, serial); 810 if (!sno) { 811 BIO_printf(bio_err, "Error converting serial number %s\n", serial); 812 return 0; 813 } 814 id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno); 815 ASN1_INTEGER_free(sno); 816 if (!id || !sk_OCSP_CERTID_push(ids, id)) 817 goto err; 818 if (!OCSP_request_add0_id(*req, id)) 819 goto err; 820 return 1; 821 822 err: 823 BIO_printf(bio_err, "Error Creating OCSP request\n"); 824 return 0; 825 } 826 827 static int 828 print_ocsp_summary(BIO * out, OCSP_BASICRESP * bs, OCSP_REQUEST * req, 829 STACK_OF(OPENSSL_STRING) * names, 830 STACK_OF(OCSP_CERTID) * ids, long nsec, 831 long maxage) 832 { 833 OCSP_CERTID *id; 834 char *name; 835 int i; 836 837 int status, reason; 838 839 ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd; 840 841 if (!bs || !req || !sk_OPENSSL_STRING_num(names) || !sk_OCSP_CERTID_num(ids)) 842 return 1; 843 844 for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) { 845 id = sk_OCSP_CERTID_value(ids, i); 846 name = sk_OPENSSL_STRING_value(names, i); 847 BIO_printf(out, "%s: ", name); 848 849 if (!OCSP_resp_find_status(bs, id, &status, &reason, 850 &rev, &thisupd, &nextupd)) { 851 BIO_puts(out, "ERROR: No Status found.\n"); 852 continue; 853 } 854 /* 855 * Check validity: if invalid write to output BIO so we know 856 * which response this refers to. 857 */ 858 if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) { 859 BIO_puts(out, "WARNING: Status times invalid.\n"); 860 ERR_print_errors(out); 861 } 862 BIO_printf(out, "%s\n", OCSP_cert_status_str(status)); 863 864 BIO_puts(out, "\tThis Update: "); 865 ASN1_GENERALIZEDTIME_print(out, thisupd); 866 BIO_puts(out, "\n"); 867 868 if (nextupd) { 869 BIO_puts(out, "\tNext Update: "); 870 ASN1_GENERALIZEDTIME_print(out, nextupd); 871 BIO_puts(out, "\n"); 872 } 873 if (status != V_OCSP_CERTSTATUS_REVOKED) 874 continue; 875 876 if (reason != -1) 877 BIO_printf(out, "\tReason: %s\n", 878 OCSP_crl_reason_str(reason)); 879 880 BIO_puts(out, "\tRevocation Time: "); 881 ASN1_GENERALIZEDTIME_print(out, rev); 882 BIO_puts(out, "\n"); 883 } 884 885 return 1; 886 } 887 888 889 static int 890 make_ocsp_response(OCSP_RESPONSE ** resp, OCSP_REQUEST * req, CA_DB * db, 891 X509 * ca, X509 * rcert, EVP_PKEY * rkey, 892 STACK_OF(X509) * rother, unsigned long flags, 893 int nmin, int ndays) 894 { 895 ASN1_TIME *thisupd = NULL, *nextupd = NULL; 896 OCSP_CERTID *cid, *ca_id = NULL; 897 OCSP_BASICRESP *bs = NULL; 898 int i, id_count, ret = 1; 899 900 id_count = OCSP_request_onereq_count(req); 901 902 if (id_count <= 0) { 903 *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL); 904 goto end; 905 } 906 bs = OCSP_BASICRESP_new(); 907 thisupd = X509_gmtime_adj(NULL, 0); 908 if (ndays != -1) 909 nextupd = X509_gmtime_adj(NULL, nmin * 60 + ndays * 3600 * 24); 910 911 /* Examine each certificate id in the request */ 912 for (i = 0; i < id_count; i++) { 913 OCSP_ONEREQ *one; 914 ASN1_INTEGER *serial; 915 char **inf; 916 ASN1_OBJECT *cert_id_md_oid; 917 const EVP_MD *cert_id_md; 918 one = OCSP_request_onereq_get0(req, i); 919 cid = OCSP_onereq_get0_id(one); 920 921 OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid); 922 923 cert_id_md = EVP_get_digestbyobj(cert_id_md_oid); 924 if (!cert_id_md) { 925 *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, 926 NULL); 927 goto end; 928 } 929 OCSP_CERTID_free(ca_id); 930 ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca); 931 932 /* Is this request about our CA? */ 933 if (OCSP_id_issuer_cmp(ca_id, cid)) { 934 OCSP_basic_add1_status(bs, cid, 935 V_OCSP_CERTSTATUS_UNKNOWN, 936 0, NULL, 937 thisupd, nextupd); 938 continue; 939 } 940 OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid); 941 inf = lookup_serial(db, serial); 942 if (!inf) 943 OCSP_basic_add1_status(bs, cid, 944 V_OCSP_CERTSTATUS_UNKNOWN, 945 0, NULL, 946 thisupd, nextupd); 947 else if (inf[DB_type][0] == DB_TYPE_VAL) 948 OCSP_basic_add1_status(bs, cid, 949 V_OCSP_CERTSTATUS_GOOD, 950 0, NULL, 951 thisupd, nextupd); 952 else if (inf[DB_type][0] == DB_TYPE_REV) { 953 ASN1_OBJECT *inst = NULL; 954 ASN1_TIME *revtm = NULL; 955 ASN1_GENERALIZEDTIME *invtm = NULL; 956 OCSP_SINGLERESP *single; 957 int reason = -1; 958 unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]); 959 single = OCSP_basic_add1_status(bs, cid, 960 V_OCSP_CERTSTATUS_REVOKED, 961 reason, revtm, 962 thisupd, nextupd); 963 if (invtm) 964 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date, invtm, 0, 0); 965 else if (inst) 966 OCSP_SINGLERESP_add1_ext_i2d(single, NID_hold_instruction_code, inst, 0, 0); 967 ASN1_OBJECT_free(inst); 968 ASN1_TIME_free(revtm); 969 ASN1_GENERALIZEDTIME_free(invtm); 970 } 971 } 972 973 OCSP_copy_nonce(bs, req); 974 975 OCSP_basic_sign(bs, rcert, rkey, NULL, rother, flags); 976 977 *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs); 978 979 end: 980 ASN1_TIME_free(thisupd); 981 ASN1_TIME_free(nextupd); 982 OCSP_CERTID_free(ca_id); 983 OCSP_BASICRESP_free(bs); 984 return ret; 985 986 } 987 988 static char ** 989 lookup_serial(CA_DB * db, ASN1_INTEGER * ser) 990 { 991 int i; 992 BIGNUM *bn = NULL; 993 char *itmp, *row[DB_NUMBER], **rrow; 994 for (i = 0; i < DB_NUMBER; i++) 995 row[i] = NULL; 996 bn = ASN1_INTEGER_to_BN(ser, NULL); 997 OPENSSL_assert(bn); /* FIXME: should report an error at this 998 * point and abort */ 999 if (BN_is_zero(bn)) 1000 itmp = strdup("00"); 1001 else 1002 itmp = BN_bn2hex(bn); 1003 row[DB_serial] = itmp; 1004 BN_free(bn); 1005 rrow = TXT_DB_get_by_index(db->db, DB_serial, row); 1006 free(itmp); 1007 return rrow; 1008 } 1009 1010 /* Quick and dirty OCSP server: read in and parse input request */ 1011 1012 static BIO * 1013 init_responder(char *port) 1014 { 1015 BIO *acbio = NULL, *bufbio = NULL; 1016 bufbio = BIO_new(BIO_f_buffer()); 1017 if (!bufbio) 1018 goto err; 1019 acbio = BIO_new_accept(port); 1020 if (!acbio) 1021 goto err; 1022 BIO_set_accept_bios(acbio, bufbio); 1023 bufbio = NULL; 1024 1025 if (BIO_do_accept(acbio) <= 0) { 1026 BIO_printf(bio_err, "Error setting up accept BIO\n"); 1027 ERR_print_errors(bio_err); 1028 goto err; 1029 } 1030 return acbio; 1031 1032 err: 1033 BIO_free_all(acbio); 1034 BIO_free(bufbio); 1035 return NULL; 1036 } 1037 1038 static int 1039 do_responder(OCSP_REQUEST ** preq, BIO ** pcbio, BIO * acbio, char *port) 1040 { 1041 int have_post = 0, len; 1042 OCSP_REQUEST *req = NULL; 1043 char inbuf[1024]; 1044 BIO *cbio = NULL; 1045 1046 if (BIO_do_accept(acbio) <= 0) { 1047 BIO_printf(bio_err, "Error accepting connection\n"); 1048 ERR_print_errors(bio_err); 1049 return 0; 1050 } 1051 cbio = BIO_pop(acbio); 1052 *pcbio = cbio; 1053 1054 for (;;) { 1055 len = BIO_gets(cbio, inbuf, sizeof inbuf); 1056 if (len <= 0) 1057 return 1; 1058 /* Look for "POST" signalling start of query */ 1059 if (!have_post) { 1060 if (strncmp(inbuf, "POST", 4)) { 1061 BIO_printf(bio_err, "Invalid request\n"); 1062 return 1; 1063 } 1064 have_post = 1; 1065 } 1066 /* Look for end of headers */ 1067 if ((inbuf[0] == '\r') || (inbuf[0] == '\n')) 1068 break; 1069 } 1070 1071 /* Try to read OCSP request */ 1072 1073 req = d2i_OCSP_REQUEST_bio(cbio, NULL); 1074 1075 if (!req) { 1076 BIO_printf(bio_err, "Error parsing OCSP request\n"); 1077 ERR_print_errors(bio_err); 1078 } 1079 *preq = req; 1080 1081 return 1; 1082 1083 } 1084 1085 static int 1086 send_ocsp_response(BIO * cbio, OCSP_RESPONSE * resp) 1087 { 1088 static const char http_resp[] = 1089 "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n" 1090 "Content-Length: %d\r\n\r\n"; 1091 if (!cbio) 1092 return 0; 1093 BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL)); 1094 i2d_OCSP_RESPONSE_bio(cbio, resp); 1095 (void) BIO_flush(cbio); 1096 return 1; 1097 } 1098 1099 static OCSP_RESPONSE * 1100 query_responder(BIO * err, BIO * cbio, char *path, 1101 STACK_OF(CONF_VALUE) * headers, 1102 OCSP_REQUEST * req, int req_timeout) 1103 { 1104 int fd; 1105 int rv; 1106 int i; 1107 OCSP_REQ_CTX *ctx = NULL; 1108 OCSP_RESPONSE *rsp = NULL; 1109 struct pollfd pfd[1]; 1110 1111 if (req_timeout != -1) 1112 BIO_set_nbio(cbio, 1); 1113 1114 rv = BIO_do_connect(cbio); 1115 1116 if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) { 1117 BIO_puts(err, "Error connecting BIO\n"); 1118 return NULL; 1119 } 1120 if (BIO_get_fd(cbio, &fd) < 0) { 1121 BIO_puts(err, "Can't get connection fd\n"); 1122 goto err; 1123 } 1124 if (req_timeout != -1 && rv <= 0) { 1125 pfd[0].fd = fd; 1126 pfd[0].events = POLLOUT; 1127 rv = poll(pfd, 1, req_timeout * 1000); 1128 if (rv == 0) { 1129 BIO_puts(err, "Timeout on connect\n"); 1130 return NULL; 1131 } 1132 if (rv == -1) { 1133 BIO_puts(err, "Poll error\n"); 1134 return NULL; 1135 } 1136 } 1137 ctx = OCSP_sendreq_new(cbio, path, NULL, -1); 1138 if (!ctx) 1139 return NULL; 1140 1141 for (i = 0; i < sk_CONF_VALUE_num(headers); i++) { 1142 CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i); 1143 if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value)) 1144 goto err; 1145 } 1146 1147 if (!OCSP_REQ_CTX_set1_req(ctx, req)) 1148 goto err; 1149 1150 for (;;) { 1151 rv = OCSP_sendreq_nbio(&rsp, ctx); 1152 if (rv != -1) 1153 break; 1154 if (req_timeout == -1) 1155 continue; 1156 pfd[0].fd = fd; 1157 if (BIO_should_read(cbio)) 1158 pfd[0].events = POLLIN; 1159 else if (BIO_should_write(cbio)) 1160 pfd[0].events = POLLOUT; 1161 else { 1162 BIO_puts(err, "Unexpected retry condition\n"); 1163 goto err; 1164 } 1165 rv = poll(pfd, 1, req_timeout * 1000); 1166 if (rv == 0) { 1167 BIO_puts(err, "Timeout on request\n"); 1168 break; 1169 } 1170 if (rv == -1 || (pfd[0].revents & (POLLERR|POLLNVAL))) { 1171 BIO_puts(err, "Poll error\n"); 1172 break; 1173 } 1174 } 1175 err: 1176 OCSP_REQ_CTX_free(ctx); 1177 1178 return rsp; 1179 } 1180 1181 OCSP_RESPONSE * 1182 process_responder(BIO * err, OCSP_REQUEST * req, 1183 char *host, char *path, char *port, int use_ssl, 1184 STACK_OF(CONF_VALUE) * headers, 1185 int req_timeout) 1186 { 1187 BIO *cbio = NULL; 1188 SSL_CTX *ctx = NULL; 1189 OCSP_RESPONSE *resp = NULL; 1190 cbio = BIO_new_connect(host); 1191 if (!cbio) { 1192 BIO_printf(err, "Error creating connect BIO\n"); 1193 goto end; 1194 } 1195 if (port) 1196 BIO_set_conn_port(cbio, port); 1197 if (use_ssl == 1) { 1198 BIO *sbio; 1199 ctx = SSL_CTX_new(SSLv23_client_method()); 1200 if (ctx == NULL) { 1201 BIO_printf(err, "Error creating SSL context.\n"); 1202 goto end; 1203 } 1204 SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY); 1205 sbio = BIO_new_ssl(ctx, 1); 1206 cbio = BIO_push(sbio, cbio); 1207 } 1208 resp = query_responder(err, cbio, path, headers, req, req_timeout); 1209 if (!resp) 1210 BIO_printf(bio_err, "Error querying OCSP responder\n"); 1211 end: 1212 BIO_free_all(cbio); 1213 SSL_CTX_free(ctx); 1214 return resp; 1215 } 1216 1217 #endif 1218