1/* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/* _ _ 18 * _ __ ___ ___ __| | ___ ___| | mod_ssl 19 * | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL 20 * | | | | | | (_) | (_| | \__ \__ \ | 21 * |_| |_| |_|\___/ \__,_|___|___/___/_| 22 * |_____| 23 * ssl_engine_init.c 24 * Initialization of Servers 25 */ 26 /* ``Recursive, adj.; 27 see Recursive.'' 28 -- Unknown */ 29#include "ssl_private.h" 30 31/* _________________________________________________________________ 32** 33** Module Initialization 34** _________________________________________________________________ 35*/ 36 37 38static void ssl_add_version_components(apr_pool_t *p, 39 server_rec *s) 40{ 41 char *modver = ssl_var_lookup(p, s, NULL, NULL, "SSL_VERSION_INTERFACE"); 42 char *libver = ssl_var_lookup(p, s, NULL, NULL, "SSL_VERSION_LIBRARY"); 43 char *incver = ssl_var_lookup(p, s, NULL, NULL, 44 "SSL_VERSION_LIBRARY_INTERFACE"); 45 46 ap_add_version_component(p, modver); 47 ap_add_version_component(p, libver); 48 49 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 50 "%s compiled against Server: %s, Library: %s", 51 modver, AP_SERVER_BASEVERSION, incver); 52} 53 54 55/* 56 * Handle the Temporary RSA Keys and DH Params 57 */ 58 59#define MODSSL_TMP_KEY_FREE(mc, type, idx) \ 60 if (mc->pTmpKeys[idx]) { \ 61 type##_free((type *)mc->pTmpKeys[idx]); \ 62 mc->pTmpKeys[idx] = NULL; \ 63 } 64 65#define MODSSL_TMP_KEYS_FREE(mc, type) \ 66 MODSSL_TMP_KEY_FREE(mc, type, SSL_TMP_KEY_##type##_512); \ 67 MODSSL_TMP_KEY_FREE(mc, type, SSL_TMP_KEY_##type##_1024) 68 69static void ssl_tmp_keys_free(server_rec *s) 70{ 71 SSLModConfigRec *mc = myModConfig(s); 72 73 MODSSL_TMP_KEYS_FREE(mc, RSA); 74 MODSSL_TMP_KEYS_FREE(mc, DH); 75#ifndef OPENSSL_NO_EC 76 MODSSL_TMP_KEY_FREE(mc, EC_KEY, SSL_TMP_KEY_EC_256); 77#endif 78} 79 80static int ssl_tmp_key_init_rsa(server_rec *s, 81 int bits, int idx) 82{ 83 SSLModConfigRec *mc = myModConfig(s); 84 85#ifdef HAVE_FIPS 86 87 if (FIPS_mode() && bits < 1024) { 88 mc->pTmpKeys[idx] = NULL; 89 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 90 "Init: Skipping generating temporary " 91 "%d bit RSA private key in FIPS mode", bits); 92 return OK; 93 } 94 95#endif 96 97 if (!(mc->pTmpKeys[idx] = 98 RSA_generate_key(bits, RSA_F4, NULL, NULL))) 99 { 100 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 101 "Init: Failed to generate temporary " 102 "%d bit RSA private key", bits); 103 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 104 return !OK; 105 } 106 107 return OK; 108} 109 110static int ssl_tmp_key_init_dh(server_rec *s, 111 int bits, int idx) 112{ 113 SSLModConfigRec *mc = myModConfig(s); 114 115#ifdef HAVE_FIPS 116 117 if (FIPS_mode() && bits < 1024) { 118 mc->pTmpKeys[idx] = NULL; 119 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 120 "Init: Skipping generating temporary " 121 "%d bit DH parameters in FIPS mode", bits); 122 return OK; 123 } 124 125#endif 126 127 if (!(mc->pTmpKeys[idx] = 128 ssl_dh_GetTmpParam(bits))) 129 { 130 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 131 "Init: Failed to generate temporary " 132 "%d bit DH parameters", bits); 133 return !OK; 134 } 135 136 return OK; 137} 138 139#ifndef OPENSSL_NO_EC 140static int ssl_tmp_key_init_ec(server_rec *s, 141 int bits, int idx) 142{ 143 SSLModConfigRec *mc = myModConfig(s); 144 EC_KEY *ecdh = NULL; 145 146 /* XXX: Are there any FIPS constraints we should enforce? */ 147 148 if (bits != 256) { 149 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 150 "Init: Failed to generate temporary " 151 "%d bit EC parameters, only 256 bits supported", bits); 152 return !OK; 153 } 154 155 if ((ecdh = EC_KEY_new()) == NULL || 156 EC_KEY_set_group(ecdh, EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1)) != 1) 157 { 158 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 159 "Init: Failed to generate temporary " 160 "%d bit EC parameters", bits); 161 return !OK; 162 } 163 164 mc->pTmpKeys[idx] = ecdh; 165 return OK; 166} 167 168#define MODSSL_TMP_KEY_INIT_EC(s, bits) \ 169 ssl_tmp_key_init_ec(s, bits, SSL_TMP_KEY_EC_##bits) 170 171#endif 172 173#define MODSSL_TMP_KEY_INIT_RSA(s, bits) \ 174 ssl_tmp_key_init_rsa(s, bits, SSL_TMP_KEY_RSA_##bits) 175 176#define MODSSL_TMP_KEY_INIT_DH(s, bits) \ 177 ssl_tmp_key_init_dh(s, bits, SSL_TMP_KEY_DH_##bits) 178 179static int ssl_tmp_keys_init(server_rec *s) 180{ 181 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 182 "Init: Generating temporary RSA private keys (512/1024 bits)"); 183 184 if (MODSSL_TMP_KEY_INIT_RSA(s, 512) || 185 MODSSL_TMP_KEY_INIT_RSA(s, 1024)) { 186 return !OK; 187 } 188 189 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 190 "Init: Generating temporary DH parameters (512/1024 bits)"); 191 192 if (MODSSL_TMP_KEY_INIT_DH(s, 512) || 193 MODSSL_TMP_KEY_INIT_DH(s, 1024)) { 194 return !OK; 195 } 196 197#ifndef OPENSSL_NO_EC 198 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 199 "Init: Generating temporary EC parameters (256 bits)"); 200 201 if (MODSSL_TMP_KEY_INIT_EC(s, 256)) { 202 return !OK; 203 } 204#endif 205 206 return OK; 207} 208 209/* 210 * Per-module initialization 211 */ 212int ssl_init_Module(apr_pool_t *p, apr_pool_t *plog, 213 apr_pool_t *ptemp, 214 server_rec *base_server) 215{ 216 SSLModConfigRec *mc = myModConfig(base_server); 217 SSLSrvConfigRec *sc; 218 server_rec *s; 219 220 /* We initialize mc->pid per-process in the child init, 221 * but it should be initialized for startup before we 222 * call ssl_rand_seed() below. 223 */ 224 mc->pid = getpid(); 225 226 /* 227 * Let us cleanup on restarts and exists 228 */ 229 apr_pool_cleanup_register(p, base_server, 230 ssl_init_ModuleKill, 231 apr_pool_cleanup_null); 232 233 /* 234 * Any init round fixes the global config 235 */ 236 ssl_config_global_create(base_server); /* just to avoid problems */ 237 ssl_config_global_fix(mc); 238 239 /* 240 * try to fix the configuration and open the dedicated SSL 241 * logfile as early as possible 242 */ 243 for (s = base_server; s; s = s->next) { 244 sc = mySrvConfig(s); 245 246 if (sc->server) { 247 sc->server->sc = sc; 248 } 249 250 if (sc->proxy) { 251 sc->proxy->sc = sc; 252 } 253 254 /* 255 * Create the server host:port string because we need it a lot 256 */ 257 sc->vhost_id = ssl_util_vhostid(p, s); 258 sc->vhost_id_len = strlen(sc->vhost_id); 259 260 if (ap_get_server_protocol(s) && 261 strcmp("https", ap_get_server_protocol(s)) == 0) { 262 sc->enabled = SSL_ENABLED_TRUE; 263 } 264 265 /* If sc->enabled is UNSET, then SSL is optional on this vhost */ 266 /* Fix up stuff that may not have been set */ 267 if (sc->enabled == SSL_ENABLED_UNSET) { 268 sc->enabled = SSL_ENABLED_FALSE; 269 } 270 if (sc->proxy_enabled == UNSET) { 271 sc->proxy_enabled = FALSE; 272 } 273 274 if (sc->session_cache_timeout == UNSET) { 275 sc->session_cache_timeout = SSL_SESSION_CACHE_TIMEOUT; 276 } 277 278 if (sc->server->pphrase_dialog_type == SSL_PPTYPE_UNSET) { 279 sc->server->pphrase_dialog_type = SSL_PPTYPE_BUILTIN; 280 } 281 282#ifdef HAVE_FIPS 283 if (sc->fips == UNSET) { 284 sc->fips = FALSE; 285 } 286#endif 287 } 288 289#if APR_HAS_THREADS 290 ssl_util_thread_setup(p); 291#endif 292 293 /* 294 * SSL external crypto device ("engine") support 295 */ 296#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT) 297 ssl_init_Engine(base_server, p); 298#endif 299 300 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 301 "Init: Initialized %s library", SSL_LIBRARY_NAME); 302 303 /* 304 * Seed the Pseudo Random Number Generator (PRNG) 305 * only need ptemp here; nothing inside allocated from the pool 306 * needs to live once we return from ssl_rand_seed(). 307 */ 308 ssl_rand_seed(base_server, ptemp, SSL_RSCTX_STARTUP, "Init: "); 309 310#ifdef HAVE_FIPS 311 if(sc->fips) { 312 if (!FIPS_mode()) { 313 if (FIPS_mode_set(1)) { 314 ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, 315 "Operating in SSL FIPS mode"); 316 } 317 else { 318 ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, "FIPS mode failed"); 319 ssl_log_ssl_error(APLOG_MARK, APLOG_EMERG, s); 320 ssl_die(); 321 } 322 } 323 } 324 else { 325 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 326 "SSL FIPS mode disabled"); 327 } 328#endif 329 330 /* 331 * read server private keys/public certs into memory. 332 * decrypting any encrypted keys via configured SSLPassPhraseDialogs 333 * anything that needs to live longer than ptemp needs to also survive 334 * restarts, in which case they'll live inside s->process->pool. 335 */ 336 ssl_pphrase_Handle(base_server, ptemp); 337 338 if (ssl_tmp_keys_init(base_server)) { 339 return !OK; 340 } 341 342 /* 343 * initialize the mutex handling 344 */ 345 if (!ssl_mutex_init(base_server, p)) { 346 return HTTP_INTERNAL_SERVER_ERROR; 347 } 348 349 /* 350 * initialize session caching 351 */ 352 ssl_scache_init(base_server, p); 353 354 /* 355 * initialize servers 356 */ 357 ap_log_error(APLOG_MARK, APLOG_INFO, 0, base_server, 358 "Init: Initializing (virtual) servers for SSL"); 359 360 for (s = base_server; s; s = s->next) { 361 sc = mySrvConfig(s); 362 /* 363 * Either now skip this server when SSL is disabled for 364 * it or give out some information about what we're 365 * configuring. 366 */ 367 368 /* 369 * Read the server certificate and key 370 */ 371 ssl_init_ConfigureServer(s, p, ptemp, sc); 372 } 373 374 /* 375 * Configuration consistency checks 376 */ 377 ssl_init_CheckServers(base_server, ptemp); 378 379 /* 380 * Announce mod_ssl and SSL library in HTTP Server field 381 * as ``mod_ssl/X.X.X OpenSSL/X.X.X'' 382 */ 383 ssl_add_version_components(p, base_server); 384 385 SSL_init_app_data2_idx(); /* for SSL_get_app_data2() at request time */ 386 387 return OK; 388} 389 390/* 391 * Support for external a Crypto Device ("engine"), usually 392 * a hardware accellerator card for crypto operations. 393 */ 394#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT) 395void ssl_init_Engine(server_rec *s, apr_pool_t *p) 396{ 397 SSLModConfigRec *mc = myModConfig(s); 398 ENGINE *e; 399 400 if (mc->szCryptoDevice) { 401 if (!(e = ENGINE_by_id(mc->szCryptoDevice))) { 402 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 403 "Init: Failed to load Crypto Device API `%s'", 404 mc->szCryptoDevice); 405 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 406 ssl_die(); 407 } 408 409 if (strEQ(mc->szCryptoDevice, "chil")) { 410 ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0); 411 } 412 413 if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) { 414 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 415 "Init: Failed to enable Crypto Device API `%s'", 416 mc->szCryptoDevice); 417 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 418 ssl_die(); 419 } 420 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 421 "Init: loaded Crypto Device API `%s'", 422 mc->szCryptoDevice); 423 424 ENGINE_free(e); 425 } 426} 427#endif 428 429static void ssl_init_server_check(server_rec *s, 430 apr_pool_t *p, 431 apr_pool_t *ptemp, 432 modssl_ctx_t *mctx) 433{ 434 /* 435 * check for important parameters and the 436 * possibility that the user forgot to set them. 437 */ 438 if (!mctx->pks->cert_files[0]) { 439 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 440 "No SSL Certificate set [hint: SSLCertificateFile]"); 441 ssl_die(); 442 } 443 444 /* 445 * Check for problematic re-initializations 446 */ 447 if (mctx->pks->certs[SSL_AIDX_RSA] || 448 mctx->pks->certs[SSL_AIDX_DSA] 449#ifndef OPENSSL_NO_EC 450 || mctx->pks->certs[SSL_AIDX_ECC] 451#endif 452 ) 453 { 454 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 455 "Illegal attempt to re-initialise SSL for server " 456 "(SSLEngine On should go in the VirtualHost, not in global scope.)"); 457 ssl_die(); 458 } 459} 460 461#ifndef OPENSSL_NO_TLSEXT 462static void ssl_init_ctx_tls_extensions(server_rec *s, 463 apr_pool_t *p, 464 apr_pool_t *ptemp, 465 modssl_ctx_t *mctx) 466{ 467 /* 468 * Configure TLS extensions support 469 */ 470 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 471 "Configuring TLS extension handling"); 472 473 /* 474 * Server name indication (SNI) 475 */ 476 if (!SSL_CTX_set_tlsext_servername_callback(mctx->ssl_ctx, 477 ssl_callback_ServerNameIndication) || 478 !SSL_CTX_set_tlsext_servername_arg(mctx->ssl_ctx, mctx)) { 479 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 480 "Unable to initialize TLS servername extension " 481 "callback (incompatible OpenSSL version?)"); 482 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 483 ssl_die(); 484 } 485} 486#endif 487 488static void ssl_init_ctx_protocol(server_rec *s, 489 apr_pool_t *p, 490 apr_pool_t *ptemp, 491 modssl_ctx_t *mctx) 492{ 493 SSL_CTX *ctx = NULL; 494 MODSSL_SSL_METHOD_CONST SSL_METHOD *method = NULL; 495 char *cp; 496 int protocol = mctx->protocol; 497 SSLSrvConfigRec *sc = mySrvConfig(s); 498 499 /* 500 * Create the new per-server SSL context 501 */ 502 if (protocol == SSL_PROTOCOL_NONE) { 503 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 504 "No SSL protocols available [hint: SSLProtocol]"); 505 ssl_die(); 506 } 507 508 cp = apr_pstrcat(p, 509#ifndef OPENSSL_NO_SSL2 510 (protocol & SSL_PROTOCOL_SSLV2 ? "SSLv2, " : ""), 511#endif 512 (protocol & SSL_PROTOCOL_SSLV3 ? "SSLv3, " : ""), 513 (protocol & SSL_PROTOCOL_TLSV1 ? "TLSv1, " : ""), 514#ifdef HAVE_TLSV1_X 515 (protocol & SSL_PROTOCOL_TLSV1_1 ? "TLSv1.1, " : ""), 516 (protocol & SSL_PROTOCOL_TLSV1_2 ? "TLSv1.2, " : ""), 517#endif 518 NULL); 519 cp[strlen(cp)-2] = NUL; 520 521 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 522 "Creating new SSL context (protocols: %s)", cp); 523 524#ifndef OPENSSL_NO_SSL2 525 if (protocol == SSL_PROTOCOL_SSLV2) { 526 method = mctx->pkp ? 527 SSLv2_client_method() : /* proxy */ 528 SSLv2_server_method(); /* server */ 529 } 530 else 531#endif 532#ifdef HAVE_TLSV1_X 533 if (protocol == SSL_PROTOCOL_TLSV1_1) { 534 method = mctx->pkp ? 535 TLSv1_1_client_method() : /* proxy */ 536 TLSv1_1_server_method(); /* server */ 537 } 538 else if (protocol == SSL_PROTOCOL_TLSV1_2) { 539 method = mctx->pkp ? 540 TLSv1_2_client_method() : /* proxy */ 541 TLSv1_2_server_method(); /* server */ 542 } 543 else 544#endif 545 { 546 method = mctx->pkp ? 547 SSLv23_client_method() : /* proxy */ 548 SSLv23_server_method(); /* server */ 549 } 550 ctx = SSL_CTX_new(method); 551 552 mctx->ssl_ctx = ctx; 553 554 SSL_CTX_set_options(ctx, SSL_OP_ALL); 555 556#ifndef OPENSSL_NO_SSL2 557 if (!(protocol & SSL_PROTOCOL_SSLV2)) { 558 SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2); 559 } 560#endif 561 562 if (!(protocol & SSL_PROTOCOL_SSLV3)) { 563 SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3); 564 } 565 566 if (!(protocol & SSL_PROTOCOL_TLSV1)) { 567 SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1); 568 } 569 570#ifdef HAVE_TLSV1_X 571 if (!(protocol & SSL_PROTOCOL_TLSV1_1)) { 572 SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_1); 573 } 574 575 if (!(protocol & SSL_PROTOCOL_TLSV1_2)) { 576 SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_2); 577 } 578#endif 579 580#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE 581 if (sc->cipher_server_pref == TRUE) { 582 SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); 583 } 584#endif 585 586 587#ifndef OPENSSL_NO_COMP 588 if (sc->compression != TRUE) { 589#ifdef SSL_OP_NO_COMPRESSION 590 /* OpenSSL >= 1.0 only */ 591 SSL_CTX_set_options(ctx, SSL_OP_NO_COMPRESSION); 592#elif OPENSSL_VERSION_NUMBER >= 0x00908000L 593 sk_SSL_COMP_zero(SSL_COMP_get_compression_methods()); 594#endif 595 } 596#endif 597 598#ifdef SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION 599 if (sc->insecure_reneg == TRUE) { 600 SSL_CTX_set_options(ctx, SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION); 601 } 602#endif 603 604 SSL_CTX_set_app_data(ctx, s); 605 606 /* 607 * Configure additional context ingredients 608 */ 609 SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE); 610 611#ifdef SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION 612 /* 613 * Disallow a session from being resumed during a renegotiation, 614 * so that an acceptable cipher suite can be negotiated. 615 */ 616 SSL_CTX_set_options(ctx, SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION); 617#endif 618} 619 620static void ssl_init_ctx_session_cache(server_rec *s, 621 apr_pool_t *p, 622 apr_pool_t *ptemp, 623 modssl_ctx_t *mctx) 624{ 625 SSL_CTX *ctx = mctx->ssl_ctx; 626 SSLModConfigRec *mc = myModConfig(s); 627 long cache_mode = SSL_SESS_CACHE_OFF; 628 if (mc->nSessionCacheMode != SSL_SCMODE_NONE) { 629 /* SSL_SESS_CACHE_NO_INTERNAL will force OpenSSL 630 * to ignore process local-caching and 631 * to always get/set/delete sessions using mod_ssl's callbacks. 632 */ 633 cache_mode = SSL_SESS_CACHE_SERVER|SSL_SESS_CACHE_NO_INTERNAL; 634 } 635 636 SSL_CTX_set_session_cache_mode(ctx, cache_mode); 637 638 SSL_CTX_sess_set_new_cb(ctx, ssl_callback_NewSessionCacheEntry); 639 SSL_CTX_sess_set_get_cb(ctx, ssl_callback_GetSessionCacheEntry); 640 SSL_CTX_sess_set_remove_cb(ctx, ssl_callback_DelSessionCacheEntry); 641} 642 643static void ssl_init_ctx_callbacks(server_rec *s, 644 apr_pool_t *p, 645 apr_pool_t *ptemp, 646 modssl_ctx_t *mctx) 647{ 648 SSL_CTX *ctx = mctx->ssl_ctx; 649 650 SSL_CTX_set_tmp_rsa_callback(ctx, ssl_callback_TmpRSA); 651 SSL_CTX_set_tmp_dh_callback(ctx, ssl_callback_TmpDH); 652#ifndef OPENSSL_NO_EC 653 SSL_CTX_set_tmp_ecdh_callback(ctx,ssl_callback_TmpECDH); 654#endif 655 656 SSL_CTX_set_info_callback(ctx, ssl_callback_Info); 657} 658 659static void ssl_init_ctx_verify(server_rec *s, 660 apr_pool_t *p, 661 apr_pool_t *ptemp, 662 modssl_ctx_t *mctx) 663{ 664 SSL_CTX *ctx = mctx->ssl_ctx; 665 666 int verify = SSL_VERIFY_NONE; 667 STACK_OF(X509_NAME) *ca_list; 668 669 if (mctx->auth.verify_mode == SSL_CVERIFY_UNSET) { 670 mctx->auth.verify_mode = SSL_CVERIFY_NONE; 671 } 672 673 if (mctx->auth.verify_depth == UNSET) { 674 mctx->auth.verify_depth = 1; 675 } 676 677 /* 678 * Configure callbacks for SSL context 679 */ 680 if (mctx->auth.verify_mode == SSL_CVERIFY_REQUIRE) { 681 verify |= SSL_VERIFY_PEER_STRICT; 682 } 683 684 if ((mctx->auth.verify_mode == SSL_CVERIFY_OPTIONAL) || 685 (mctx->auth.verify_mode == SSL_CVERIFY_OPTIONAL_NO_CA)) 686 { 687 verify |= SSL_VERIFY_PEER; 688 } 689 690 SSL_CTX_set_verify(ctx, verify, ssl_callback_SSLVerify); 691 692 /* 693 * Configure Client Authentication details 694 */ 695 if (mctx->auth.ca_cert_file || mctx->auth.ca_cert_path) { 696 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 697 "Configuring client authentication"); 698 699 if (!SSL_CTX_load_verify_locations(ctx, 700 MODSSL_PCHAR_CAST mctx->auth.ca_cert_file, 701 MODSSL_PCHAR_CAST mctx->auth.ca_cert_path)) 702 { 703 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 704 "Unable to configure verify locations " 705 "for client authentication"); 706 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 707 ssl_die(); 708 } 709 710 if (mctx->pks && (mctx->pks->ca_name_file || mctx->pks->ca_name_path)) { 711 ca_list = ssl_init_FindCAList(s, ptemp, 712 mctx->pks->ca_name_file, 713 mctx->pks->ca_name_path); 714 } else 715 ca_list = ssl_init_FindCAList(s, ptemp, 716 mctx->auth.ca_cert_file, 717 mctx->auth.ca_cert_path); 718 if (!ca_list) { 719 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 720 "Unable to determine list of acceptable " 721 "CA certificates for client authentication"); 722 ssl_die(); 723 } 724 725 SSL_CTX_set_client_CA_list(ctx, ca_list); 726 } 727 728 /* 729 * Give a warning when no CAs were configured but client authentication 730 * should take place. This cannot work. 731 */ 732 if (mctx->auth.verify_mode == SSL_CVERIFY_REQUIRE) { 733 ca_list = SSL_CTX_get_client_CA_list(ctx); 734 735 if (sk_X509_NAME_num(ca_list) == 0) { 736 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 737 "Init: Oops, you want to request client " 738 "authentication, but no CAs are known for " 739 "verification!? [Hint: SSLCACertificate*]"); 740 } 741 } 742} 743 744static void ssl_init_ctx_cipher_suite(server_rec *s, 745 apr_pool_t *p, 746 apr_pool_t *ptemp, 747 modssl_ctx_t *mctx) 748{ 749 SSL_CTX *ctx = mctx->ssl_ctx; 750 const char *suite = mctx->auth.cipher_suite; 751 752 /* 753 * Configure SSL Cipher Suite 754 */ 755 if (!suite) { 756 return; 757 } 758 759 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 760 "Configuring permitted SSL ciphers [%s]", 761 suite); 762 763 if (!SSL_CTX_set_cipher_list(ctx, MODSSL_PCHAR_CAST suite)) { 764 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 765 "Unable to configure permitted SSL ciphers"); 766 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 767 ssl_die(); 768 } 769} 770 771static void ssl_init_ctx_crl(server_rec *s, 772 apr_pool_t *p, 773 apr_pool_t *ptemp, 774 modssl_ctx_t *mctx) 775{ 776 /* 777 * Configure Certificate Revocation List (CRL) Details 778 */ 779 780 if (!(mctx->crl_file || mctx->crl_path)) { 781 return; 782 } 783 784 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 785 "Configuring certificate revocation facility"); 786 787 mctx->crl = 788 SSL_X509_STORE_create((char *)mctx->crl_file, 789 (char *)mctx->crl_path); 790 791 if (!mctx->crl) { 792 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 793 "Unable to configure X.509 CRL storage " 794 "for certificate revocation"); 795 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 796 ssl_die(); 797 } 798} 799 800static void ssl_init_ctx_cert_chain(server_rec *s, 801 apr_pool_t *p, 802 apr_pool_t *ptemp, 803 modssl_ctx_t *mctx) 804{ 805 BOOL skip_first = FALSE; 806 int i, n; 807 const char *chain = mctx->cert_chain; 808 809 /* 810 * Optionally configure extra server certificate chain certificates. 811 * This is usually done by OpenSSL automatically when one of the 812 * server cert issuers are found under SSLCACertificatePath or in 813 * SSLCACertificateFile. But because these are intended for client 814 * authentication it can conflict. For instance when you use a 815 * Global ID server certificate you've to send out the intermediate 816 * CA certificate, too. When you would just configure this with 817 * SSLCACertificateFile and also use client authentication mod_ssl 818 * would accept all clients also issued by this CA. Obviously this 819 * isn't what we want in this situation. So this feature here exists 820 * to allow one to explicity configure CA certificates which are 821 * used only for the server certificate chain. 822 */ 823 if (!chain) { 824 return; 825 } 826 827 for (i = 0; (i < SSL_AIDX_MAX) && mctx->pks->cert_files[i]; i++) { 828 if (strEQ(mctx->pks->cert_files[i], chain)) { 829 skip_first = TRUE; 830 break; 831 } 832 } 833 834 n = SSL_CTX_use_certificate_chain(mctx->ssl_ctx, 835 (char *)chain, 836 skip_first, NULL); 837 if (n < 0) { 838 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 839 "Failed to configure CA certificate chain!"); 840 ssl_die(); 841 } 842 843 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 844 "Configuring server certificate chain " 845 "(%d CA certificate%s)", 846 n, n == 1 ? "" : "s"); 847} 848 849static void ssl_init_ctx(server_rec *s, 850 apr_pool_t *p, 851 apr_pool_t *ptemp, 852 modssl_ctx_t *mctx) 853{ 854 ssl_init_ctx_protocol(s, p, ptemp, mctx); 855 856 ssl_init_ctx_session_cache(s, p, ptemp, mctx); 857 858 ssl_init_ctx_callbacks(s, p, ptemp, mctx); 859 860 ssl_init_ctx_verify(s, p, ptemp, mctx); 861 862 ssl_init_ctx_cipher_suite(s, p, ptemp, mctx); 863 864 ssl_init_ctx_crl(s, p, ptemp, mctx); 865 866 if (mctx->pks) { 867 /* XXX: proxy support? */ 868 ssl_init_ctx_cert_chain(s, p, ptemp, mctx); 869#ifndef OPENSSL_NO_TLSEXT 870 ssl_init_ctx_tls_extensions(s, p, ptemp, mctx); 871#endif 872 } 873} 874 875static int ssl_server_import_cert(server_rec *s, 876 modssl_ctx_t *mctx, 877 const char *id, 878 int idx) 879{ 880 SSLModConfigRec *mc = myModConfig(s); 881 ssl_asn1_t *asn1; 882 MODSSL_D2I_X509_CONST unsigned char *ptr; 883 const char *type = ssl_asn1_keystr(idx); 884 X509 *cert; 885 886 if (!(asn1 = ssl_asn1_table_get(mc->tPublicCert, id))) { 887 return FALSE; 888 } 889 890 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 891 "Configuring %s server certificate", type); 892 893 ptr = asn1->cpData; 894 if (!(cert = d2i_X509(NULL, &ptr, asn1->nData))) { 895 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 896 "Unable to import %s server certificate", type); 897 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 898 ssl_die(); 899 } 900 901 if (SSL_CTX_use_certificate(mctx->ssl_ctx, cert) <= 0) { 902 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 903 "Unable to configure %s server certificate", type); 904 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 905 ssl_die(); 906 } 907 908 mctx->pks->certs[idx] = cert; 909 910 return TRUE; 911} 912 913static int ssl_server_import_key(server_rec *s, 914 modssl_ctx_t *mctx, 915 const char *id, 916 int idx) 917{ 918 SSLModConfigRec *mc = myModConfig(s); 919 ssl_asn1_t *asn1; 920 MODSSL_D2I_PrivateKey_CONST unsigned char *ptr; 921 const char *type = ssl_asn1_keystr(idx); 922 int pkey_type; 923 EVP_PKEY *pkey; 924 925#ifndef OPENSSL_NO_EC 926 if (idx == SSL_AIDX_ECC) 927 pkey_type = EVP_PKEY_EC; 928 else 929#endif 930 pkey_type = (idx == SSL_AIDX_RSA) ? EVP_PKEY_RSA : EVP_PKEY_DSA; 931 932 if (!(asn1 = ssl_asn1_table_get(mc->tPrivateKey, id))) { 933 return FALSE; 934 } 935 936 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 937 "Configuring %s server private key", type); 938 939 ptr = asn1->cpData; 940 if (!(pkey = d2i_PrivateKey(pkey_type, NULL, &ptr, asn1->nData))) 941 { 942 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 943 "Unable to import %s server private key", type); 944 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 945 ssl_die(); 946 } 947 948 if (SSL_CTX_use_PrivateKey(mctx->ssl_ctx, pkey) <= 0) { 949 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 950 "Unable to configure %s server private key", type); 951 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 952 ssl_die(); 953 } 954 955 /* 956 * XXX: wonder if this is still needed, this is old todo doc. 957 * (see http://www.psy.uq.edu.au/~ftp/Crypto/ssleay/TODO.html) 958 */ 959 if ((pkey_type == EVP_PKEY_DSA) && mctx->pks->certs[idx]) { 960 EVP_PKEY *pubkey = X509_get_pubkey(mctx->pks->certs[idx]); 961 962 if (pubkey && EVP_PKEY_missing_parameters(pubkey)) { 963 EVP_PKEY_copy_parameters(pubkey, pkey); 964 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 965 "Copying DSA parameters from private key to certificate"); 966 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 967 EVP_PKEY_free(pubkey); 968 } 969 } 970 971 mctx->pks->keys[idx] = pkey; 972 973 return TRUE; 974} 975 976static void ssl_check_public_cert(server_rec *s, 977 apr_pool_t *ptemp, 978 X509 *cert, 979 int type) 980{ 981 int is_ca, pathlen; 982 char *cn; 983 984 if (!cert) { 985 return; 986 } 987 988 /* 989 * Some information about the certificate(s) 990 */ 991 992 if (SSL_X509_isSGC(cert)) { 993 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 994 "%s server certificate enables " 995 "Server Gated Cryptography (SGC)", 996 ssl_asn1_keystr(type)); 997 } 998 999 if (SSL_X509_getBC(cert, &is_ca, &pathlen)) { 1000 if (is_ca) { 1001 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1002 "%s server certificate is a CA certificate " 1003 "(BasicConstraints: CA == TRUE !?)", 1004 ssl_asn1_keystr(type)); 1005 } 1006 1007 if (pathlen > 0) { 1008 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1009 "%s server certificate is not a leaf certificate " 1010 "(BasicConstraints: pathlen == %d > 0 !?)", 1011 ssl_asn1_keystr(type), pathlen); 1012 } 1013 } 1014 1015 if (SSL_X509_getCN(ptemp, cert, &cn)) { 1016 int fnm_flags = APR_FNM_PERIOD|APR_FNM_CASE_BLIND; 1017 1018 if (apr_fnmatch_test(cn)) { 1019 if (apr_fnmatch(cn, s->server_hostname, 1020 fnm_flags) == APR_FNM_NOMATCH) { 1021 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1022 "%s server certificate wildcard CommonName " 1023 "(CN) `%s' does NOT match server name!?", 1024 ssl_asn1_keystr(type), cn); 1025 } 1026 } 1027 else if (strNE(s->server_hostname, cn)) { 1028 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1029 "%s server certificate CommonName (CN) `%s' " 1030 "does NOT match server name!?", 1031 ssl_asn1_keystr(type), cn); 1032 } 1033 } 1034} 1035 1036static void ssl_init_server_certs(server_rec *s, 1037 apr_pool_t *p, 1038 apr_pool_t *ptemp, 1039 modssl_ctx_t *mctx) 1040{ 1041 const char *rsa_id, *dsa_id; 1042#ifndef OPENSSL_NO_EC 1043 const char *ecc_id; 1044#endif 1045 const char *vhost_id = mctx->sc->vhost_id; 1046 int i; 1047 int have_rsa, have_dsa; 1048#ifndef OPENSSL_NO_EC 1049 int have_ecc; 1050#endif 1051 1052 rsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_RSA); 1053 dsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_DSA); 1054#ifndef OPENSSL_NO_EC 1055 ecc_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_ECC); 1056#endif 1057 1058 have_rsa = ssl_server_import_cert(s, mctx, rsa_id, SSL_AIDX_RSA); 1059 have_dsa = ssl_server_import_cert(s, mctx, dsa_id, SSL_AIDX_DSA); 1060#ifndef OPENSSL_NO_EC 1061 have_ecc = ssl_server_import_cert(s, mctx, ecc_id, SSL_AIDX_ECC); 1062#endif 1063 1064 if (!(have_rsa || have_dsa 1065#ifndef OPENSSL_NO_EC 1066 || have_ecc 1067#endif 1068)) { 1069 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 1070#ifndef OPENSSL_NO_EC 1071 "Oops, no RSA, DSA or ECC server certificate found " 1072#else 1073 "Oops, no RSA or DSA server certificate found " 1074#endif 1075 "for '%s:%d'?!", s->server_hostname, s->port); 1076 ssl_die(); 1077 } 1078 1079 for (i = 0; i < SSL_AIDX_MAX; i++) { 1080 ssl_check_public_cert(s, ptemp, mctx->pks->certs[i], i); 1081 } 1082 1083 have_rsa = ssl_server_import_key(s, mctx, rsa_id, SSL_AIDX_RSA); 1084 have_dsa = ssl_server_import_key(s, mctx, dsa_id, SSL_AIDX_DSA); 1085#ifndef OPENSSL_NO_EC 1086 have_ecc = ssl_server_import_key(s, mctx, ecc_id, SSL_AIDX_ECC); 1087#endif 1088 1089 if (!(have_rsa || have_dsa 1090#ifndef OPENSSL_NO_EC 1091 || have_ecc 1092#endif 1093 )) { 1094 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 1095#ifndef OPENSSL_NO_EC 1096 "Oops, no RSA, DSA or ECC server private key found?!"); 1097#else 1098 "Oops, no RSA or DSA server private key found?!"); 1099#endif 1100 ssl_die(); 1101 } 1102} 1103 1104static void ssl_init_proxy_certs(server_rec *s, 1105 apr_pool_t *p, 1106 apr_pool_t *ptemp, 1107 modssl_ctx_t *mctx) 1108{ 1109 int n, ncerts = 0; 1110 STACK_OF(X509_INFO) *sk; 1111 STACK_OF(X509) *chain; 1112 X509_STORE_CTX *sctx; 1113 X509_STORE *store = SSL_CTX_get_cert_store(mctx->ssl_ctx); 1114 modssl_pk_proxy_t *pkp = mctx->pkp; 1115 1116 SSL_CTX_set_client_cert_cb(mctx->ssl_ctx, 1117 ssl_callback_proxy_cert); 1118 1119 if (!(pkp->cert_file || pkp->cert_path)) { 1120 return; 1121 } 1122 1123 sk = sk_X509_INFO_new_null(); 1124 1125 if (pkp->cert_file) { 1126 SSL_X509_INFO_load_file(ptemp, sk, pkp->cert_file); 1127 } 1128 1129 if (pkp->cert_path) { 1130 SSL_X509_INFO_load_path(ptemp, sk, pkp->cert_path); 1131 } 1132 1133 if ((ncerts = sk_X509_INFO_num(sk)) <= 0) { 1134 sk_X509_INFO_free(sk); 1135 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1136 "no client certs found for SSL proxy"); 1137 return; 1138 } 1139 1140 /* Check that all client certs have got certificates and private 1141 * keys. */ 1142 for (n = 0; n < ncerts; n++) { 1143 X509_INFO *inf = sk_X509_INFO_value(sk, n); 1144 1145 if (!inf->x509 || !inf->x_pkey || !inf->x_pkey->dec_pkey || 1146 inf->enc_data) { 1147 sk_X509_INFO_free(sk); 1148 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s, 1149 "incomplete client cert configured for SSL proxy " 1150 "(missing or encrypted private key?)"); 1151 ssl_die(); 1152 return; 1153 } 1154 1155 if (X509_check_private_key(inf->x509, inf->x_pkey->dec_pkey) != 1) { 1156 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s, 1157 "proxy client certificate and " 1158 "private key do not match"); 1159 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 1160 ssl_die(); 1161 return; 1162 } 1163 } 1164 1165 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 1166 "loaded %d client certs for SSL proxy", 1167 ncerts); 1168 pkp->certs = sk; 1169 1170 if (!pkp->ca_cert_file || !store) { 1171 return; 1172 } 1173 1174 /* If SSLProxyMachineCertificateChainFile is configured, load all 1175 * the CA certs and have OpenSSL attempt to construct a full chain 1176 * from each configured end-entity cert up to a root. This will 1177 * allow selection of the correct cert given a list of root CA 1178 * names in the certificate request from the server. */ 1179 pkp->ca_certs = (STACK_OF(X509) **) apr_pcalloc(p, ncerts * sizeof(sk)); 1180 sctx = X509_STORE_CTX_new(); 1181 1182 if (!sctx) { 1183 ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, 1184 "SSL proxy client cert initialization failed"); 1185 ssl_log_ssl_error(APLOG_MARK, APLOG_EMERG, s); 1186 ssl_die(); 1187 } 1188 1189 X509_STORE_load_locations(store, pkp->ca_cert_file, NULL); 1190 1191 for (n = 0; n < ncerts; n++) { 1192 int i; 1193 1194 X509_INFO *inf = sk_X509_INFO_value(pkp->certs, n); 1195 X509_NAME *name = X509_get_subject_name(inf->x509); 1196 char *cert_dn = SSL_X509_NAME_to_string(ptemp, name, 0); 1197 X509_STORE_CTX_init(sctx, store, inf->x509, NULL); 1198 1199 /* Attempt to verify the client cert */ 1200 if (X509_verify_cert(sctx) != 1) { 1201 int err = X509_STORE_CTX_get_error(sctx); 1202 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1203 "SSL proxy client cert chain verification failed for %s: %s", 1204 cert_dn, X509_verify_cert_error_string(err)); 1205 } 1206 1207 /* Clear X509_verify_cert errors */ 1208 ERR_clear_error(); 1209 1210 /* Obtain a copy of the verified chain */ 1211 chain = X509_STORE_CTX_get1_chain(sctx); 1212 1213 if (chain != NULL) { 1214 /* Discard end entity cert from the chain */ 1215 X509_free(sk_X509_shift(chain)); 1216 1217 if ((i = sk_X509_num(chain)) > 0) { 1218 /* Store the chain for later use */ 1219 pkp->ca_certs[n] = chain; 1220 } 1221 else { 1222 /* Discard empty chain */ 1223 sk_X509_pop_free(chain, X509_free); 1224 pkp->ca_certs[n] = NULL; 1225 } 1226 1227 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 1228 "loaded %i intermediate CA%s for cert %i (%s)", 1229 i, i == 1 ? "" : "s", n, cert_dn); 1230 if (i > 0) { 1231 int j; 1232 for (j = 0; j < i; j++) { 1233 X509_NAME *ca_name = X509_get_subject_name(sk_X509_value(chain, j)); 1234 char *ca_dn = SSL_X509_NAME_to_string(ptemp, ca_name, 0); 1235 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "%i: %s", j, ca_dn); 1236 } 1237 } 1238 } 1239 1240 /* get ready for next X509_STORE_CTX_init */ 1241 X509_STORE_CTX_cleanup(sctx); 1242 } 1243 1244 X509_STORE_CTX_free(sctx); 1245} 1246 1247static void ssl_init_proxy_ctx(server_rec *s, 1248 apr_pool_t *p, 1249 apr_pool_t *ptemp, 1250 SSLSrvConfigRec *sc) 1251{ 1252 ssl_init_ctx(s, p, ptemp, sc->proxy); 1253 1254 ssl_init_proxy_certs(s, p, ptemp, sc->proxy); 1255} 1256 1257static void ssl_init_server_ctx(server_rec *s, 1258 apr_pool_t *p, 1259 apr_pool_t *ptemp, 1260 SSLSrvConfigRec *sc) 1261{ 1262 ssl_init_server_check(s, p, ptemp, sc->server); 1263 1264 ssl_init_ctx(s, p, ptemp, sc->server); 1265 1266 ssl_init_server_certs(s, p, ptemp, sc->server); 1267} 1268 1269/* 1270 * Configure a particular server 1271 */ 1272void ssl_init_ConfigureServer(server_rec *s, 1273 apr_pool_t *p, 1274 apr_pool_t *ptemp, 1275 SSLSrvConfigRec *sc) 1276{ 1277 /* Initialize the server if SSL is enabled or optional. 1278 */ 1279 if ((sc->enabled == SSL_ENABLED_TRUE) || (sc->enabled == SSL_ENABLED_OPTIONAL)) { 1280 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 1281 "Configuring server for SSL protocol"); 1282 ssl_init_server_ctx(s, p, ptemp, sc); 1283 } 1284 1285 if (sc->proxy_enabled) { 1286 ssl_init_proxy_ctx(s, p, ptemp, sc); 1287 } 1288} 1289 1290void ssl_init_CheckServers(server_rec *base_server, apr_pool_t *p) 1291{ 1292 server_rec *s, *ps; 1293 SSLSrvConfigRec *sc; 1294 apr_hash_t *table; 1295 const char *key; 1296 apr_ssize_t klen; 1297 1298 BOOL conflict = FALSE; 1299 1300 /* 1301 * Give out warnings when a server has HTTPS configured 1302 * for the HTTP port or vice versa 1303 */ 1304 for (s = base_server; s; s = s->next) { 1305 sc = mySrvConfig(s); 1306 1307 if ((sc->enabled == SSL_ENABLED_TRUE) && (s->port == DEFAULT_HTTP_PORT)) { 1308 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, 1309 base_server, 1310 "Init: (%s) You configured HTTPS(%d) " 1311 "on the standard HTTP(%d) port!", 1312 ssl_util_vhostid(p, s), 1313 DEFAULT_HTTPS_PORT, DEFAULT_HTTP_PORT); 1314 } 1315 1316 if ((sc->enabled == SSL_ENABLED_FALSE) && (s->port == DEFAULT_HTTPS_PORT)) { 1317 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, 1318 base_server, 1319 "Init: (%s) You configured HTTP(%d) " 1320 "on the standard HTTPS(%d) port!", 1321 ssl_util_vhostid(p, s), 1322 DEFAULT_HTTP_PORT, DEFAULT_HTTPS_PORT); 1323 } 1324 } 1325 1326 /* 1327 * Give out warnings when more than one SSL-aware virtual server uses the 1328 * same IP:port. This doesn't work because mod_ssl then will always use 1329 * just the certificate/keys of one virtual host (which one cannot be said 1330 * easily - but that doesn't matter here). 1331 */ 1332 table = apr_hash_make(p); 1333 1334 for (s = base_server; s; s = s->next) { 1335 char *addr; 1336 1337 sc = mySrvConfig(s); 1338 1339 if (!((sc->enabled == SSL_ENABLED_TRUE) && s->addrs)) { 1340 continue; 1341 } 1342 1343 apr_sockaddr_ip_get(&addr, s->addrs->host_addr); 1344 key = apr_psprintf(p, "%s:%u", addr, s->addrs->host_port); 1345 klen = strlen(key); 1346 1347 if ((ps = (server_rec *)apr_hash_get(table, key, klen))) { 1348#ifdef OPENSSL_NO_TLSEXT 1349 int level = APLOG_WARNING; 1350 const char *problem = "conflict"; 1351#else 1352 int level = APLOG_DEBUG; 1353 const char *problem = "overlap"; 1354#endif 1355 ap_log_error(APLOG_MARK, level, 0, base_server, 1356 "Init: SSL server IP/port %s: " 1357 "%s (%s:%d) vs. %s (%s:%d)", 1358 problem, ssl_util_vhostid(p, s), 1359 (s->defn_name ? s->defn_name : "unknown"), 1360 s->defn_line_number, 1361 ssl_util_vhostid(p, ps), 1362 (ps->defn_name ? ps->defn_name : "unknown"), 1363 ps->defn_line_number); 1364 conflict = TRUE; 1365 continue; 1366 } 1367 1368 apr_hash_set(table, key, klen, s); 1369 } 1370 1371 if (conflict) { 1372 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, 1373#ifdef OPENSSL_NO_TLSEXT 1374 "Init: You should not use name-based " 1375 "virtual hosts in conjunction with SSL!!"); 1376#else 1377 "Init: Name-based SSL virtual hosts only " 1378 "work for clients with TLS server name indication " 1379 "support (RFC 4366)"); 1380#endif 1381 } 1382} 1383 1384#ifdef SSLC_VERSION_NUMBER 1385static int ssl_init_FindCAList_X509NameCmp(char **a, char **b) 1386{ 1387 return(X509_NAME_cmp((void*)*a, (void*)*b)); 1388} 1389#else 1390static int ssl_init_FindCAList_X509NameCmp(const X509_NAME * const *a, 1391 const X509_NAME * const *b) 1392{ 1393 return(X509_NAME_cmp(*a, *b)); 1394} 1395#endif 1396 1397static void ssl_init_PushCAList(STACK_OF(X509_NAME) *ca_list, 1398 server_rec *s, const char *file) 1399{ 1400 int n; 1401 STACK_OF(X509_NAME) *sk; 1402 1403 sk = (STACK_OF(X509_NAME) *) 1404 SSL_load_client_CA_file(MODSSL_PCHAR_CAST file); 1405 1406 if (!sk) { 1407 return; 1408 } 1409 1410 for (n = 0; n < sk_X509_NAME_num(sk); n++) { 1411 char name_buf[256]; 1412 X509_NAME *name = sk_X509_NAME_value(sk, n); 1413 1414 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 1415 "CA certificate: %s", 1416 X509_NAME_oneline(name, name_buf, sizeof(name_buf))); 1417 1418 /* 1419 * note that SSL_load_client_CA_file() checks for duplicates, 1420 * but since we call it multiple times when reading a directory 1421 * we must also check for duplicates ourselves. 1422 */ 1423 1424 if (sk_X509_NAME_find(ca_list, name) < 0) { 1425 /* this will be freed when ca_list is */ 1426 sk_X509_NAME_push(ca_list, name); 1427 } 1428 else { 1429 /* need to free this ourselves, else it will leak */ 1430 X509_NAME_free(name); 1431 } 1432 } 1433 1434 sk_X509_NAME_free(sk); 1435} 1436 1437STACK_OF(X509_NAME) *ssl_init_FindCAList(server_rec *s, 1438 apr_pool_t *ptemp, 1439 const char *ca_file, 1440 const char *ca_path) 1441{ 1442 STACK_OF(X509_NAME) *ca_list; 1443 1444 /* 1445 * Start with a empty stack/list where new 1446 * entries get added in sorted order. 1447 */ 1448 ca_list = sk_X509_NAME_new(ssl_init_FindCAList_X509NameCmp); 1449 1450 /* 1451 * Process CA certificate bundle file 1452 */ 1453 if (ca_file) { 1454 ssl_init_PushCAList(ca_list, s, ca_file); 1455 } 1456 1457 /* 1458 * Process CA certificate path files 1459 */ 1460 if (ca_path) { 1461 apr_dir_t *dir; 1462 apr_finfo_t direntry; 1463 apr_int32_t finfo_flags = APR_FINFO_TYPE|APR_FINFO_NAME; 1464 apr_status_t rv; 1465 1466 if ((rv = apr_dir_open(&dir, ca_path, ptemp)) != APR_SUCCESS) { 1467 ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, 1468 "Failed to open Certificate Path `%s'", 1469 ca_path); 1470 ssl_die(); 1471 } 1472 1473 while ((apr_dir_read(&direntry, finfo_flags, dir)) == APR_SUCCESS) { 1474 const char *file; 1475 if (direntry.filetype == APR_DIR) { 1476 continue; /* don't try to load directories */ 1477 } 1478 file = apr_pstrcat(ptemp, ca_path, "/", direntry.name, NULL); 1479 ssl_init_PushCAList(ca_list, s, file); 1480 } 1481 1482 apr_dir_close(dir); 1483 } 1484 1485 /* 1486 * Cleanup 1487 */ 1488 (void) sk_X509_NAME_set_cmp_func(ca_list, NULL); 1489 1490 return ca_list; 1491} 1492 1493void ssl_init_Child(apr_pool_t *p, server_rec *s) 1494{ 1495 SSLModConfigRec *mc = myModConfig(s); 1496 mc->pid = getpid(); /* only call getpid() once per-process */ 1497 1498 /* XXX: there should be an ap_srand() function */ 1499 srand((unsigned int)time(NULL)); 1500 1501 /* open the mutex lockfile */ 1502 ssl_mutex_reinit(s, p); 1503} 1504 1505#define MODSSL_CFG_ITEM_FREE(func, item) \ 1506 if (item) { \ 1507 func(item); \ 1508 item = NULL; \ 1509 } 1510 1511static void ssl_init_ctx_cleanup(modssl_ctx_t *mctx) 1512{ 1513 MODSSL_CFG_ITEM_FREE(X509_STORE_free, mctx->crl); 1514 1515 MODSSL_CFG_ITEM_FREE(SSL_CTX_free, mctx->ssl_ctx); 1516} 1517 1518static void ssl_init_ctx_cleanup_proxy(modssl_ctx_t *mctx) 1519{ 1520 ssl_init_ctx_cleanup(mctx); 1521 1522 if (mctx->pkp->certs) { 1523 int i = 0; 1524 int ncerts = sk_X509_INFO_num(mctx->pkp->certs); 1525 1526 if (mctx->pkp->ca_certs) { 1527 for (i = 0; i < ncerts; i++) { 1528 if (mctx->pkp->ca_certs[i] != NULL) { 1529 sk_X509_pop_free(mctx->pkp->ca_certs[i], X509_free); 1530 } 1531 } 1532 } 1533 1534 sk_X509_INFO_pop_free(mctx->pkp->certs, X509_INFO_free); 1535 mctx->pkp->certs = NULL; 1536 } 1537} 1538 1539static void ssl_init_ctx_cleanup_server(modssl_ctx_t *mctx) 1540{ 1541 int i; 1542 1543 ssl_init_ctx_cleanup(mctx); 1544 1545 for (i=0; i < SSL_AIDX_MAX; i++) { 1546 MODSSL_CFG_ITEM_FREE(X509_free, 1547 mctx->pks->certs[i]); 1548 1549 MODSSL_CFG_ITEM_FREE(EVP_PKEY_free, 1550 mctx->pks->keys[i]); 1551 } 1552} 1553 1554apr_status_t ssl_init_ModuleKill(void *data) 1555{ 1556 SSLSrvConfigRec *sc; 1557 server_rec *base_server = (server_rec *)data; 1558 server_rec *s; 1559 1560 /* 1561 * Drop the session cache and mutex 1562 */ 1563 ssl_scache_kill(base_server); 1564 1565 /* 1566 * Destroy the temporary keys and params 1567 */ 1568 ssl_tmp_keys_free(base_server); 1569 1570 /* 1571 * Free the non-pool allocated structures 1572 * in the per-server configurations 1573 */ 1574 for (s = base_server; s; s = s->next) { 1575 sc = mySrvConfig(s); 1576 1577 ssl_init_ctx_cleanup_proxy(sc->proxy); 1578 1579 ssl_init_ctx_cleanup_server(sc->server); 1580 } 1581 1582 return APR_SUCCESS; 1583} 1584 1585