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 if (sc->allow_empty_fragments == UNSET) 288 sc->allow_empty_fragments = TRUE; 289 290 } 291 292#if APR_HAS_THREADS 293 ssl_util_thread_setup(p); 294#endif 295 296 /* 297 * SSL external crypto device ("engine") support 298 */ 299#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT) 300 ssl_init_Engine(base_server, p); 301#endif 302 303 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 304 "Init: Initialized %s library", SSL_LIBRARY_NAME); 305 306 /* 307 * Seed the Pseudo Random Number Generator (PRNG) 308 * only need ptemp here; nothing inside allocated from the pool 309 * needs to live once we return from ssl_rand_seed(). 310 */ 311 ssl_rand_seed(base_server, ptemp, SSL_RSCTX_STARTUP, "Init: "); 312 313#ifdef HAVE_FIPS 314 if(sc->fips) { 315 if (!FIPS_mode()) { 316 if (FIPS_mode_set(1)) { 317 ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, 318 "Operating in SSL FIPS mode"); 319 } 320 else { 321 ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, "FIPS mode failed"); 322 ssl_log_ssl_error(APLOG_MARK, APLOG_EMERG, s); 323 ssl_die(); 324 } 325 } 326 } 327 else { 328 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 329 "SSL FIPS mode disabled"); 330 } 331#endif 332 333 /* 334 * read server private keys/public certs into memory. 335 * decrypting any encrypted keys via configured SSLPassPhraseDialogs 336 * anything that needs to live longer than ptemp needs to also survive 337 * restarts, in which case they'll live inside s->process->pool. 338 */ 339 ssl_pphrase_Handle(base_server, ptemp); 340 341 if (ssl_tmp_keys_init(base_server)) { 342 return !OK; 343 } 344 345 /* 346 * initialize the mutex handling 347 */ 348 if (!ssl_mutex_init(base_server, p)) { 349 return HTTP_INTERNAL_SERVER_ERROR; 350 } 351 352 /* 353 * initialize session caching 354 */ 355 ssl_scache_init(base_server, p); 356 357 /* 358 * initialize servers 359 */ 360 ap_log_error(APLOG_MARK, APLOG_INFO, 0, base_server, 361 "Init: Initializing (virtual) servers for SSL"); 362 363 for (s = base_server; s; s = s->next) { 364 sc = mySrvConfig(s); 365 /* 366 * Either now skip this server when SSL is disabled for 367 * it or give out some information about what we're 368 * configuring. 369 */ 370 371 /* 372 * Read the server certificate and key 373 */ 374 ssl_init_ConfigureServer(s, p, ptemp, sc); 375 } 376 377 /* 378 * Configuration consistency checks 379 */ 380 ssl_init_CheckServers(base_server, ptemp); 381 382 /* 383 * Announce mod_ssl and SSL library in HTTP Server field 384 * as ``mod_ssl/X.X.X OpenSSL/X.X.X'' 385 */ 386 ssl_add_version_components(p, base_server); 387 388 SSL_init_app_data2_idx(); /* for SSL_get_app_data2() at request time */ 389 390 return OK; 391} 392 393/* 394 * Support for external a Crypto Device ("engine"), usually 395 * a hardware accellerator card for crypto operations. 396 */ 397#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT) 398void ssl_init_Engine(server_rec *s, apr_pool_t *p) 399{ 400 SSLModConfigRec *mc = myModConfig(s); 401 ENGINE *e; 402 403 if (mc->szCryptoDevice) { 404 if (!(e = ENGINE_by_id(mc->szCryptoDevice))) { 405 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 406 "Init: Failed to load Crypto Device API `%s'", 407 mc->szCryptoDevice); 408 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 409 ssl_die(); 410 } 411 412 if (strEQ(mc->szCryptoDevice, "chil")) { 413 ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0); 414 } 415 416 if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) { 417 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 418 "Init: Failed to enable Crypto Device API `%s'", 419 mc->szCryptoDevice); 420 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 421 ssl_die(); 422 } 423 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 424 "Init: loaded Crypto Device API `%s'", 425 mc->szCryptoDevice); 426 427 ENGINE_free(e); 428 } 429} 430#endif 431 432static void ssl_init_server_check(server_rec *s, 433 apr_pool_t *p, 434 apr_pool_t *ptemp, 435 modssl_ctx_t *mctx) 436{ 437 /* 438 * check for important parameters and the 439 * possibility that the user forgot to set them. 440 */ 441 if (!mctx->pks->cert_files[0]) { 442 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 443 "No SSL Certificate set [hint: SSLCertificateFile]"); 444 ssl_die(); 445 } 446 447 /* 448 * Check for problematic re-initializations 449 */ 450 if (mctx->pks->certs[SSL_AIDX_RSA] || 451 mctx->pks->certs[SSL_AIDX_DSA] 452#ifndef OPENSSL_NO_EC 453 || mctx->pks->certs[SSL_AIDX_ECC] 454#endif 455 ) 456 { 457 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 458 "Illegal attempt to re-initialise SSL for server " 459 "(SSLEngine On should go in the VirtualHost, not in global scope.)"); 460 ssl_die(); 461 } 462} 463 464#ifndef OPENSSL_NO_TLSEXT 465static void ssl_init_ctx_tls_extensions(server_rec *s, 466 apr_pool_t *p, 467 apr_pool_t *ptemp, 468 modssl_ctx_t *mctx) 469{ 470 /* 471 * Configure TLS extensions support 472 */ 473 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 474 "Configuring TLS extension handling"); 475 476 /* 477 * Server name indication (SNI) 478 */ 479 if (!SSL_CTX_set_tlsext_servername_callback(mctx->ssl_ctx, 480 ssl_callback_ServerNameIndication) || 481 !SSL_CTX_set_tlsext_servername_arg(mctx->ssl_ctx, mctx)) { 482 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 483 "Unable to initialize TLS servername extension " 484 "callback (incompatible OpenSSL version?)"); 485 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 486 ssl_die(); 487 } 488} 489#endif 490 491static void ssl_init_ctx_protocol(server_rec *s, 492 apr_pool_t *p, 493 apr_pool_t *ptemp, 494 modssl_ctx_t *mctx) 495{ 496 SSL_CTX *ctx = NULL; 497 MODSSL_SSL_METHOD_CONST SSL_METHOD *method = NULL; 498 char *cp; 499 int protocol = mctx->protocol; 500 SSLSrvConfigRec *sc = mySrvConfig(s); 501 502 /* 503 * Create the new per-server SSL context 504 */ 505 if (protocol == SSL_PROTOCOL_NONE) { 506 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 507 "No SSL protocols available [hint: SSLProtocol]"); 508 ssl_die(); 509 } 510 511 cp = apr_pstrcat(p, 512#ifndef OPENSSL_NO_SSL2 513 (protocol & SSL_PROTOCOL_SSLV2 ? "SSLv2, " : ""), 514#endif 515 (protocol & SSL_PROTOCOL_SSLV3 ? "SSLv3, " : ""), 516 (protocol & SSL_PROTOCOL_TLSV1 ? "TLSv1, " : ""), 517#ifdef HAVE_TLSV1_X 518 (protocol & SSL_PROTOCOL_TLSV1_1 ? "TLSv1.1, " : ""), 519 (protocol & SSL_PROTOCOL_TLSV1_2 ? "TLSv1.2, " : ""), 520#endif 521 NULL); 522 cp[strlen(cp)-2] = NUL; 523 524 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 525 "Creating new SSL context (protocols: %s)", cp); 526 527#ifndef OPENSSL_NO_SSL2 528 if (protocol == SSL_PROTOCOL_SSLV2) { 529 method = mctx->pkp ? 530 SSLv2_client_method() : /* proxy */ 531 SSLv2_server_method(); /* server */ 532 } 533 else 534#endif 535#ifdef HAVE_TLSV1_X 536 if (protocol == SSL_PROTOCOL_TLSV1_1) { 537 method = mctx->pkp ? 538 TLSv1_1_client_method() : /* proxy */ 539 TLSv1_1_server_method(); /* server */ 540 } 541 else if (protocol == SSL_PROTOCOL_TLSV1_2) { 542 method = mctx->pkp ? 543 TLSv1_2_client_method() : /* proxy */ 544 TLSv1_2_server_method(); /* server */ 545 } 546 else 547#endif 548 { 549 method = mctx->pkp ? 550 SSLv23_client_method() : /* proxy */ 551 SSLv23_server_method(); /* server */ 552 } 553 ctx = SSL_CTX_new(method); 554 555 mctx->ssl_ctx = ctx; 556 557 SSL_CTX_set_options(ctx, SSL_OP_ALL); 558 559 if (sc->allow_empty_fragments) { 560 SSL_CTX_clear_options(ctx, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); 561 } 562 563#ifndef OPENSSL_NO_SSL2 564 if (!(protocol & SSL_PROTOCOL_SSLV2)) { 565 SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2); 566 } 567#endif 568 569 if (!(protocol & SSL_PROTOCOL_SSLV3)) { 570 SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3); 571 } 572 573 if (!(protocol & SSL_PROTOCOL_TLSV1)) { 574 SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1); 575 } 576 577#ifdef HAVE_TLSV1_X 578 if (!(protocol & SSL_PROTOCOL_TLSV1_1)) { 579 SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_1); 580 } 581 582 if (!(protocol & SSL_PROTOCOL_TLSV1_2)) { 583 SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_2); 584 } 585#endif 586 587#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE 588 if (sc->cipher_server_pref == TRUE) { 589 SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); 590 } 591#endif 592 593 594#ifndef OPENSSL_NO_COMP 595 if (sc->compression != TRUE) { 596#ifdef SSL_OP_NO_COMPRESSION 597 /* OpenSSL >= 1.0 only */ 598 SSL_CTX_set_options(ctx, SSL_OP_NO_COMPRESSION); 599#elif OPENSSL_VERSION_NUMBER >= 0x00908000L 600 sk_SSL_COMP_zero(SSL_COMP_get_compression_methods()); 601#endif 602 } 603#endif 604 605#ifdef SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION 606 if (sc->insecure_reneg == TRUE) { 607 SSL_CTX_set_options(ctx, SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION); 608 } 609#endif 610 611 SSL_CTX_set_app_data(ctx, s); 612 613 /* 614 * Configure additional context ingredients 615 */ 616 SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE); 617 618#ifdef SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION 619 /* 620 * Disallow a session from being resumed during a renegotiation, 621 * so that an acceptable cipher suite can be negotiated. 622 */ 623 SSL_CTX_set_options(ctx, SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION); 624#endif 625} 626 627static void ssl_init_ctx_session_cache(server_rec *s, 628 apr_pool_t *p, 629 apr_pool_t *ptemp, 630 modssl_ctx_t *mctx) 631{ 632 SSL_CTX *ctx = mctx->ssl_ctx; 633 SSLModConfigRec *mc = myModConfig(s); 634 long cache_mode = SSL_SESS_CACHE_OFF; 635 if (mc->nSessionCacheMode != SSL_SCMODE_NONE) { 636 /* SSL_SESS_CACHE_NO_INTERNAL will force OpenSSL 637 * to ignore process local-caching and 638 * to always get/set/delete sessions using mod_ssl's callbacks. 639 */ 640 cache_mode = SSL_SESS_CACHE_SERVER|SSL_SESS_CACHE_NO_INTERNAL; 641 } 642 643 SSL_CTX_set_session_cache_mode(ctx, cache_mode); 644 645 SSL_CTX_sess_set_new_cb(ctx, ssl_callback_NewSessionCacheEntry); 646 SSL_CTX_sess_set_get_cb(ctx, ssl_callback_GetSessionCacheEntry); 647 SSL_CTX_sess_set_remove_cb(ctx, ssl_callback_DelSessionCacheEntry); 648} 649 650static void ssl_init_ctx_callbacks(server_rec *s, 651 apr_pool_t *p, 652 apr_pool_t *ptemp, 653 modssl_ctx_t *mctx) 654{ 655 SSL_CTX *ctx = mctx->ssl_ctx; 656 657 SSL_CTX_set_tmp_rsa_callback(ctx, ssl_callback_TmpRSA); 658 SSL_CTX_set_tmp_dh_callback(ctx, ssl_callback_TmpDH); 659#ifndef OPENSSL_NO_EC 660 SSL_CTX_set_tmp_ecdh_callback(ctx,ssl_callback_TmpECDH); 661#endif 662 663 SSL_CTX_set_info_callback(ctx, ssl_callback_Info); 664} 665 666static void ssl_init_ctx_verify(server_rec *s, 667 apr_pool_t *p, 668 apr_pool_t *ptemp, 669 modssl_ctx_t *mctx) 670{ 671 SSL_CTX *ctx = mctx->ssl_ctx; 672 673 int verify = SSL_VERIFY_NONE; 674 STACK_OF(X509_NAME) *ca_list; 675 676 if (mctx->auth.verify_mode == SSL_CVERIFY_UNSET) { 677 mctx->auth.verify_mode = SSL_CVERIFY_NONE; 678 } 679 680 if (mctx->auth.verify_depth == UNSET) { 681 mctx->auth.verify_depth = 1; 682 } 683 684 /* 685 * Configure callbacks for SSL context 686 */ 687 if (mctx->auth.verify_mode == SSL_CVERIFY_REQUIRE) { 688 verify |= SSL_VERIFY_PEER_STRICT; 689 } 690 691 if ((mctx->auth.verify_mode == SSL_CVERIFY_OPTIONAL) || 692 (mctx->auth.verify_mode == SSL_CVERIFY_OPTIONAL_NO_CA)) 693 { 694 verify |= SSL_VERIFY_PEER; 695 } 696 697 SSL_CTX_set_verify(ctx, verify, ssl_callback_SSLVerify); 698 699 /* 700 * Configure Client Authentication details 701 */ 702 if (mctx->auth.ca_cert_file || mctx->auth.ca_cert_path) { 703 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 704 "Configuring client authentication"); 705 706 if (!SSL_CTX_load_verify_locations(ctx, 707 MODSSL_PCHAR_CAST mctx->auth.ca_cert_file, 708 MODSSL_PCHAR_CAST mctx->auth.ca_cert_path)) 709 { 710 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 711 "Unable to configure verify locations " 712 "for client authentication"); 713 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 714 ssl_die(); 715 } 716 717 if (mctx->pks && (mctx->pks->ca_name_file || mctx->pks->ca_name_path)) { 718 ca_list = ssl_init_FindCAList(s, ptemp, 719 mctx->pks->ca_name_file, 720 mctx->pks->ca_name_path); 721 } else 722 ca_list = ssl_init_FindCAList(s, ptemp, 723 mctx->auth.ca_cert_file, 724 mctx->auth.ca_cert_path); 725 if (!ca_list) { 726 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 727 "Unable to determine list of acceptable " 728 "CA certificates for client authentication"); 729 ssl_die(); 730 } 731 732 SSL_CTX_set_client_CA_list(ctx, ca_list); 733 } 734 735 /* 736 * Give a warning when no CAs were configured but client authentication 737 * should take place. This cannot work. 738 */ 739 if (mctx->auth.verify_mode == SSL_CVERIFY_REQUIRE) { 740 ca_list = SSL_CTX_get_client_CA_list(ctx); 741 742 if (sk_X509_NAME_num(ca_list) == 0) { 743 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 744 "Init: Oops, you want to request client " 745 "authentication, but no CAs are known for " 746 "verification!? [Hint: SSLCACertificate*]"); 747 } 748 } 749} 750 751static void ssl_init_ctx_cipher_suite(server_rec *s, 752 apr_pool_t *p, 753 apr_pool_t *ptemp, 754 modssl_ctx_t *mctx) 755{ 756 SSL_CTX *ctx = mctx->ssl_ctx; 757 const char *suite = mctx->auth.cipher_suite; 758 759 /* 760 * Configure SSL Cipher Suite 761 */ 762 if (!suite) { 763 return; 764 } 765 766 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 767 "Configuring permitted SSL ciphers [%s]", 768 suite); 769 770 if (!SSL_CTX_set_cipher_list(ctx, MODSSL_PCHAR_CAST suite)) { 771 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 772 "Unable to configure permitted SSL ciphers"); 773 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 774 ssl_die(); 775 } 776} 777 778static void ssl_init_ctx_crl(server_rec *s, 779 apr_pool_t *p, 780 apr_pool_t *ptemp, 781 modssl_ctx_t *mctx) 782{ 783 /* 784 * Configure Certificate Revocation List (CRL) Details 785 */ 786 787 if (!(mctx->crl_file || mctx->crl_path)) { 788 return; 789 } 790 791 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 792 "Configuring certificate revocation facility"); 793 794 mctx->crl = 795 SSL_X509_STORE_create((char *)mctx->crl_file, 796 (char *)mctx->crl_path); 797 798 if (!mctx->crl) { 799 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 800 "Unable to configure X.509 CRL storage " 801 "for certificate revocation"); 802 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 803 ssl_die(); 804 } 805} 806 807static void ssl_init_ctx_cert_chain(server_rec *s, 808 apr_pool_t *p, 809 apr_pool_t *ptemp, 810 modssl_ctx_t *mctx) 811{ 812 BOOL skip_first = FALSE; 813 int i, n; 814 const char *chain = mctx->cert_chain; 815 816 /* 817 * Optionally configure extra server certificate chain certificates. 818 * This is usually done by OpenSSL automatically when one of the 819 * server cert issuers are found under SSLCACertificatePath or in 820 * SSLCACertificateFile. But because these are intended for client 821 * authentication it can conflict. For instance when you use a 822 * Global ID server certificate you've to send out the intermediate 823 * CA certificate, too. When you would just configure this with 824 * SSLCACertificateFile and also use client authentication mod_ssl 825 * would accept all clients also issued by this CA. Obviously this 826 * isn't what we want in this situation. So this feature here exists 827 * to allow one to explicity configure CA certificates which are 828 * used only for the server certificate chain. 829 */ 830 if (!chain) { 831 return; 832 } 833 834 for (i = 0; (i < SSL_AIDX_MAX) && mctx->pks->cert_files[i]; i++) { 835 if (strEQ(mctx->pks->cert_files[i], chain)) { 836 skip_first = TRUE; 837 break; 838 } 839 } 840 841 n = SSL_CTX_use_certificate_chain(mctx->ssl_ctx, 842 (char *)chain, 843 skip_first, NULL); 844 if (n < 0) { 845 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 846 "Failed to configure CA certificate chain!"); 847 ssl_die(); 848 } 849 850 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 851 "Configuring server certificate chain " 852 "(%d CA certificate%s)", 853 n, n == 1 ? "" : "s"); 854} 855 856static void ssl_init_ctx(server_rec *s, 857 apr_pool_t *p, 858 apr_pool_t *ptemp, 859 modssl_ctx_t *mctx) 860{ 861 ssl_init_ctx_protocol(s, p, ptemp, mctx); 862 863 ssl_init_ctx_session_cache(s, p, ptemp, mctx); 864 865 ssl_init_ctx_callbacks(s, p, ptemp, mctx); 866 867 ssl_init_ctx_verify(s, p, ptemp, mctx); 868 869 ssl_init_ctx_cipher_suite(s, p, ptemp, mctx); 870 871 ssl_init_ctx_crl(s, p, ptemp, mctx); 872 873 if (mctx->pks) { 874 /* XXX: proxy support? */ 875 ssl_init_ctx_cert_chain(s, p, ptemp, mctx); 876#ifndef OPENSSL_NO_TLSEXT 877 ssl_init_ctx_tls_extensions(s, p, ptemp, mctx); 878#endif 879 } 880} 881 882static int ssl_server_import_cert(server_rec *s, 883 modssl_ctx_t *mctx, 884 const char *id, 885 int idx) 886{ 887 SSLModConfigRec *mc = myModConfig(s); 888 ssl_asn1_t *asn1; 889 MODSSL_D2I_X509_CONST unsigned char *ptr; 890 const char *type = ssl_asn1_keystr(idx); 891 X509 *cert; 892 893 if (!(asn1 = ssl_asn1_table_get(mc->tPublicCert, id))) { 894 return FALSE; 895 } 896 897 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 898 "Configuring %s server certificate", type); 899 900 ptr = asn1->cpData; 901 if (!(cert = d2i_X509(NULL, &ptr, asn1->nData))) { 902 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 903 "Unable to import %s server certificate", type); 904 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 905 ssl_die(); 906 } 907 908 if (SSL_CTX_use_certificate(mctx->ssl_ctx, cert) <= 0) { 909 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 910 "Unable to configure %s server certificate", type); 911 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 912 ssl_die(); 913 } 914 915 mctx->pks->certs[idx] = cert; 916 917 return TRUE; 918} 919 920static int ssl_server_import_key(server_rec *s, 921 modssl_ctx_t *mctx, 922 const char *id, 923 int idx) 924{ 925 SSLModConfigRec *mc = myModConfig(s); 926 ssl_asn1_t *asn1; 927 MODSSL_D2I_PrivateKey_CONST unsigned char *ptr; 928 const char *type = ssl_asn1_keystr(idx); 929 int pkey_type; 930 EVP_PKEY *pkey; 931 932#ifndef OPENSSL_NO_EC 933 if (idx == SSL_AIDX_ECC) 934 pkey_type = EVP_PKEY_EC; 935 else 936#endif 937 pkey_type = (idx == SSL_AIDX_RSA) ? EVP_PKEY_RSA : EVP_PKEY_DSA; 938 939 if (!(asn1 = ssl_asn1_table_get(mc->tPrivateKey, id))) { 940 return FALSE; 941 } 942 943 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 944 "Configuring %s server private key", type); 945 946 ptr = asn1->cpData; 947 if (!(pkey = d2i_PrivateKey(pkey_type, NULL, &ptr, asn1->nData))) 948 { 949 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 950 "Unable to import %s server private key", type); 951 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 952 ssl_die(); 953 } 954 955 if (SSL_CTX_use_PrivateKey(mctx->ssl_ctx, pkey) <= 0) { 956 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 957 "Unable to configure %s server private key", type); 958 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 959 ssl_die(); 960 } 961 962 /* 963 * XXX: wonder if this is still needed, this is old todo doc. 964 * (see http://www.psy.uq.edu.au/~ftp/Crypto/ssleay/TODO.html) 965 */ 966 if ((pkey_type == EVP_PKEY_DSA) && mctx->pks->certs[idx]) { 967 EVP_PKEY *pubkey = X509_get_pubkey(mctx->pks->certs[idx]); 968 969 if (pubkey && EVP_PKEY_missing_parameters(pubkey)) { 970 EVP_PKEY_copy_parameters(pubkey, pkey); 971 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 972 "Copying DSA parameters from private key to certificate"); 973 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 974 EVP_PKEY_free(pubkey); 975 } 976 } 977 978 mctx->pks->keys[idx] = pkey; 979 980 return TRUE; 981} 982 983static void ssl_check_public_cert(server_rec *s, 984 apr_pool_t *ptemp, 985 X509 *cert, 986 int type) 987{ 988 int is_ca, pathlen; 989 char *cn; 990 991 if (!cert) { 992 return; 993 } 994 995 /* 996 * Some information about the certificate(s) 997 */ 998 999 if (SSL_X509_isSGC(cert)) { 1000 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 1001 "%s server certificate enables " 1002 "Server Gated Cryptography (SGC)", 1003 ssl_asn1_keystr(type)); 1004 } 1005 1006 if (SSL_X509_getBC(cert, &is_ca, &pathlen)) { 1007 if (is_ca) { 1008 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1009 "%s server certificate is a CA certificate " 1010 "(BasicConstraints: CA == TRUE !?)", 1011 ssl_asn1_keystr(type)); 1012 } 1013 1014 if (pathlen > 0) { 1015 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1016 "%s server certificate is not a leaf certificate " 1017 "(BasicConstraints: pathlen == %d > 0 !?)", 1018 ssl_asn1_keystr(type), pathlen); 1019 } 1020 } 1021 1022 if (SSL_X509_getCN(ptemp, cert, &cn)) { 1023 int fnm_flags = APR_FNM_PERIOD|APR_FNM_CASE_BLIND; 1024 1025 if (apr_fnmatch_test(cn)) { 1026 if (apr_fnmatch(cn, s->server_hostname, 1027 fnm_flags) == APR_FNM_NOMATCH) { 1028 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1029 "%s server certificate wildcard CommonName " 1030 "(CN) `%s' does NOT match server name!?", 1031 ssl_asn1_keystr(type), cn); 1032 } 1033 } 1034 else if (strNE(s->server_hostname, cn)) { 1035 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1036 "%s server certificate CommonName (CN) `%s' " 1037 "does NOT match server name!?", 1038 ssl_asn1_keystr(type), cn); 1039 } 1040 } 1041} 1042 1043static void ssl_init_server_certs(server_rec *s, 1044 apr_pool_t *p, 1045 apr_pool_t *ptemp, 1046 modssl_ctx_t *mctx) 1047{ 1048 const char *rsa_id, *dsa_id; 1049#ifndef OPENSSL_NO_EC 1050 const char *ecc_id; 1051#endif 1052 const char *vhost_id = mctx->sc->vhost_id; 1053 int i; 1054 int have_rsa, have_dsa; 1055#ifndef OPENSSL_NO_EC 1056 int have_ecc; 1057#endif 1058 1059 rsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_RSA); 1060 dsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_DSA); 1061#ifndef OPENSSL_NO_EC 1062 ecc_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_ECC); 1063#endif 1064 1065 have_rsa = ssl_server_import_cert(s, mctx, rsa_id, SSL_AIDX_RSA); 1066 have_dsa = ssl_server_import_cert(s, mctx, dsa_id, SSL_AIDX_DSA); 1067#ifndef OPENSSL_NO_EC 1068 have_ecc = ssl_server_import_cert(s, mctx, ecc_id, SSL_AIDX_ECC); 1069#endif 1070 1071 if (!(have_rsa || have_dsa 1072#ifndef OPENSSL_NO_EC 1073 || have_ecc 1074#endif 1075)) { 1076 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 1077#ifndef OPENSSL_NO_EC 1078 "Oops, no RSA, DSA or ECC server certificate found " 1079#else 1080 "Oops, no RSA or DSA server certificate found " 1081#endif 1082 "for '%s:%d'?!", s->server_hostname, s->port); 1083 ssl_die(); 1084 } 1085 1086 for (i = 0; i < SSL_AIDX_MAX; i++) { 1087 ssl_check_public_cert(s, ptemp, mctx->pks->certs[i], i); 1088 } 1089 1090 have_rsa = ssl_server_import_key(s, mctx, rsa_id, SSL_AIDX_RSA); 1091 have_dsa = ssl_server_import_key(s, mctx, dsa_id, SSL_AIDX_DSA); 1092#ifndef OPENSSL_NO_EC 1093 have_ecc = ssl_server_import_key(s, mctx, ecc_id, SSL_AIDX_ECC); 1094#endif 1095 1096 if (!(have_rsa || have_dsa 1097#ifndef OPENSSL_NO_EC 1098 || have_ecc 1099#endif 1100 )) { 1101 ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, 1102#ifndef OPENSSL_NO_EC 1103 "Oops, no RSA, DSA or ECC server private key found?!"); 1104#else 1105 "Oops, no RSA or DSA server private key found?!"); 1106#endif 1107 ssl_die(); 1108 } 1109} 1110 1111static void ssl_init_proxy_certs(server_rec *s, 1112 apr_pool_t *p, 1113 apr_pool_t *ptemp, 1114 modssl_ctx_t *mctx) 1115{ 1116 int n, ncerts = 0; 1117 STACK_OF(X509_INFO) *sk; 1118 STACK_OF(X509) *chain; 1119 X509_STORE_CTX *sctx; 1120 X509_STORE *store = SSL_CTX_get_cert_store(mctx->ssl_ctx); 1121 modssl_pk_proxy_t *pkp = mctx->pkp; 1122 1123 SSL_CTX_set_client_cert_cb(mctx->ssl_ctx, 1124 ssl_callback_proxy_cert); 1125 1126 if (!(pkp->cert_file || pkp->cert_path)) { 1127 return; 1128 } 1129 1130 sk = sk_X509_INFO_new_null(); 1131 1132 if (pkp->cert_file) { 1133 SSL_X509_INFO_load_file(ptemp, sk, pkp->cert_file); 1134 } 1135 1136 if (pkp->cert_path) { 1137 SSL_X509_INFO_load_path(ptemp, sk, pkp->cert_path); 1138 } 1139 1140 if ((ncerts = sk_X509_INFO_num(sk)) <= 0) { 1141 sk_X509_INFO_free(sk); 1142 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1143 "no client certs found for SSL proxy"); 1144 return; 1145 } 1146 1147 /* Check that all client certs have got certificates and private 1148 * keys. */ 1149 for (n = 0; n < ncerts; n++) { 1150 X509_INFO *inf = sk_X509_INFO_value(sk, n); 1151 1152 if (!inf->x509 || !inf->x_pkey || !inf->x_pkey->dec_pkey || 1153 inf->enc_data) { 1154 sk_X509_INFO_free(sk); 1155 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s, 1156 "incomplete client cert configured for SSL proxy " 1157 "(missing or encrypted private key?)"); 1158 ssl_die(); 1159 return; 1160 } 1161 1162 if (X509_check_private_key(inf->x509, inf->x_pkey->dec_pkey) != 1) { 1163 ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s, 1164 "proxy client certificate and " 1165 "private key do not match"); 1166 ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s); 1167 ssl_die(); 1168 return; 1169 } 1170 } 1171 1172 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 1173 "loaded %d client certs for SSL proxy", 1174 ncerts); 1175 pkp->certs = sk; 1176 1177 if (!pkp->ca_cert_file || !store) { 1178 return; 1179 } 1180 1181 /* If SSLProxyMachineCertificateChainFile is configured, load all 1182 * the CA certs and have OpenSSL attempt to construct a full chain 1183 * from each configured end-entity cert up to a root. This will 1184 * allow selection of the correct cert given a list of root CA 1185 * names in the certificate request from the server. */ 1186 pkp->ca_certs = (STACK_OF(X509) **) apr_pcalloc(p, ncerts * sizeof(sk)); 1187 sctx = X509_STORE_CTX_new(); 1188 1189 if (!sctx) { 1190 ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, 1191 "SSL proxy client cert initialization failed"); 1192 ssl_log_ssl_error(APLOG_MARK, APLOG_EMERG, s); 1193 ssl_die(); 1194 } 1195 1196 X509_STORE_load_locations(store, pkp->ca_cert_file, NULL); 1197 1198 for (n = 0; n < ncerts; n++) { 1199 int i; 1200 1201 X509_INFO *inf = sk_X509_INFO_value(pkp->certs, n); 1202 X509_NAME *name = X509_get_subject_name(inf->x509); 1203 char *cert_dn = SSL_X509_NAME_to_string(ptemp, name, 0); 1204 X509_STORE_CTX_init(sctx, store, inf->x509, NULL); 1205 1206 /* Attempt to verify the client cert */ 1207 if (X509_verify_cert(sctx) != 1) { 1208 int err = X509_STORE_CTX_get_error(sctx); 1209 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, 1210 "SSL proxy client cert chain verification failed for %s: %s", 1211 cert_dn, X509_verify_cert_error_string(err)); 1212 } 1213 1214 /* Clear X509_verify_cert errors */ 1215 ERR_clear_error(); 1216 1217 /* Obtain a copy of the verified chain */ 1218 chain = X509_STORE_CTX_get1_chain(sctx); 1219 1220 if (chain != NULL) { 1221 /* Discard end entity cert from the chain */ 1222 X509_free(sk_X509_shift(chain)); 1223 1224 if ((i = sk_X509_num(chain)) > 0) { 1225 /* Store the chain for later use */ 1226 pkp->ca_certs[n] = chain; 1227 } 1228 else { 1229 /* Discard empty chain */ 1230 sk_X509_pop_free(chain, X509_free); 1231 pkp->ca_certs[n] = NULL; 1232 } 1233 1234 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 1235 "loaded %i intermediate CA%s for cert %i (%s)", 1236 i, i == 1 ? "" : "s", n, cert_dn); 1237 if (i > 0) { 1238 int j; 1239 for (j = 0; j < i; j++) { 1240 X509_NAME *ca_name = X509_get_subject_name(sk_X509_value(chain, j)); 1241 char *ca_dn = SSL_X509_NAME_to_string(ptemp, ca_name, 0); 1242 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "%i: %s", j, ca_dn); 1243 } 1244 } 1245 } 1246 1247 /* get ready for next X509_STORE_CTX_init */ 1248 X509_STORE_CTX_cleanup(sctx); 1249 } 1250 1251 X509_STORE_CTX_free(sctx); 1252} 1253 1254static void ssl_init_proxy_ctx(server_rec *s, 1255 apr_pool_t *p, 1256 apr_pool_t *ptemp, 1257 SSLSrvConfigRec *sc) 1258{ 1259 ssl_init_ctx(s, p, ptemp, sc->proxy); 1260 1261 ssl_init_proxy_certs(s, p, ptemp, sc->proxy); 1262} 1263 1264static void ssl_init_server_ctx(server_rec *s, 1265 apr_pool_t *p, 1266 apr_pool_t *ptemp, 1267 SSLSrvConfigRec *sc) 1268{ 1269 ssl_init_server_check(s, p, ptemp, sc->server); 1270 1271 ssl_init_ctx(s, p, ptemp, sc->server); 1272 1273 ssl_init_server_certs(s, p, ptemp, sc->server); 1274} 1275 1276/* 1277 * Configure a particular server 1278 */ 1279void ssl_init_ConfigureServer(server_rec *s, 1280 apr_pool_t *p, 1281 apr_pool_t *ptemp, 1282 SSLSrvConfigRec *sc) 1283{ 1284 /* Initialize the server if SSL is enabled or optional. 1285 */ 1286 if ((sc->enabled == SSL_ENABLED_TRUE) || (sc->enabled == SSL_ENABLED_OPTIONAL)) { 1287 ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, 1288 "Configuring server for SSL protocol"); 1289 ssl_init_server_ctx(s, p, ptemp, sc); 1290 } 1291 1292 if (sc->proxy_enabled) { 1293 ssl_init_proxy_ctx(s, p, ptemp, sc); 1294 } 1295} 1296 1297void ssl_init_CheckServers(server_rec *base_server, apr_pool_t *p) 1298{ 1299 server_rec *s, *ps; 1300 SSLSrvConfigRec *sc; 1301 apr_hash_t *table; 1302 const char *key; 1303 apr_ssize_t klen; 1304 1305 BOOL conflict = FALSE; 1306 1307 /* 1308 * Give out warnings when a server has HTTPS configured 1309 * for the HTTP port or vice versa 1310 */ 1311 for (s = base_server; s; s = s->next) { 1312 sc = mySrvConfig(s); 1313 1314 if ((sc->enabled == SSL_ENABLED_TRUE) && (s->port == DEFAULT_HTTP_PORT)) { 1315 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, 1316 base_server, 1317 "Init: (%s) You configured HTTPS(%d) " 1318 "on the standard HTTP(%d) port!", 1319 ssl_util_vhostid(p, s), 1320 DEFAULT_HTTPS_PORT, DEFAULT_HTTP_PORT); 1321 } 1322 1323 if ((sc->enabled == SSL_ENABLED_FALSE) && (s->port == DEFAULT_HTTPS_PORT)) { 1324 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, 1325 base_server, 1326 "Init: (%s) You configured HTTP(%d) " 1327 "on the standard HTTPS(%d) port!", 1328 ssl_util_vhostid(p, s), 1329 DEFAULT_HTTP_PORT, DEFAULT_HTTPS_PORT); 1330 } 1331 } 1332 1333 /* 1334 * Give out warnings when more than one SSL-aware virtual server uses the 1335 * same IP:port. This doesn't work because mod_ssl then will always use 1336 * just the certificate/keys of one virtual host (which one cannot be said 1337 * easily - but that doesn't matter here). 1338 */ 1339 table = apr_hash_make(p); 1340 1341 for (s = base_server; s; s = s->next) { 1342 char *addr; 1343 1344 sc = mySrvConfig(s); 1345 1346 if (!((sc->enabled == SSL_ENABLED_TRUE) && s->addrs)) { 1347 continue; 1348 } 1349 1350 apr_sockaddr_ip_get(&addr, s->addrs->host_addr); 1351 key = apr_psprintf(p, "%s:%u", addr, s->addrs->host_port); 1352 klen = strlen(key); 1353 1354 if ((ps = (server_rec *)apr_hash_get(table, key, klen))) { 1355#ifdef OPENSSL_NO_TLSEXT 1356 int level = APLOG_WARNING; 1357 const char *problem = "conflict"; 1358#else 1359 int level = APLOG_DEBUG; 1360 const char *problem = "overlap"; 1361#endif 1362 ap_log_error(APLOG_MARK, level, 0, base_server, 1363 "Init: SSL server IP/port %s: " 1364 "%s (%s:%d) vs. %s (%s:%d)", 1365 problem, ssl_util_vhostid(p, s), 1366 (s->defn_name ? s->defn_name : "unknown"), 1367 s->defn_line_number, 1368 ssl_util_vhostid(p, ps), 1369 (ps->defn_name ? ps->defn_name : "unknown"), 1370 ps->defn_line_number); 1371 conflict = TRUE; 1372 continue; 1373 } 1374 1375 apr_hash_set(table, key, klen, s); 1376 } 1377 1378 if (conflict) { 1379 ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, 1380#ifdef OPENSSL_NO_TLSEXT 1381 "Init: You should not use name-based " 1382 "virtual hosts in conjunction with SSL!!"); 1383#else 1384 "Init: Name-based SSL virtual hosts only " 1385 "work for clients with TLS server name indication " 1386 "support (RFC 4366)"); 1387#endif 1388 } 1389} 1390 1391#ifdef SSLC_VERSION_NUMBER 1392static int ssl_init_FindCAList_X509NameCmp(char **a, char **b) 1393{ 1394 return(X509_NAME_cmp((void*)*a, (void*)*b)); 1395} 1396#else 1397static int ssl_init_FindCAList_X509NameCmp(const X509_NAME * const *a, 1398 const X509_NAME * const *b) 1399{ 1400 return(X509_NAME_cmp(*a, *b)); 1401} 1402#endif 1403 1404static void ssl_init_PushCAList(STACK_OF(X509_NAME) *ca_list, 1405 server_rec *s, const char *file) 1406{ 1407 int n; 1408 STACK_OF(X509_NAME) *sk; 1409 1410 sk = (STACK_OF(X509_NAME) *) 1411 SSL_load_client_CA_file(MODSSL_PCHAR_CAST file); 1412 1413 if (!sk) { 1414 return; 1415 } 1416 1417 for (n = 0; n < sk_X509_NAME_num(sk); n++) { 1418 char name_buf[256]; 1419 X509_NAME *name = sk_X509_NAME_value(sk, n); 1420 1421 ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, 1422 "CA certificate: %s", 1423 X509_NAME_oneline(name, name_buf, sizeof(name_buf))); 1424 1425 /* 1426 * note that SSL_load_client_CA_file() checks for duplicates, 1427 * but since we call it multiple times when reading a directory 1428 * we must also check for duplicates ourselves. 1429 */ 1430 1431 if (sk_X509_NAME_find(ca_list, name) < 0) { 1432 /* this will be freed when ca_list is */ 1433 sk_X509_NAME_push(ca_list, name); 1434 } 1435 else { 1436 /* need to free this ourselves, else it will leak */ 1437 X509_NAME_free(name); 1438 } 1439 } 1440 1441 sk_X509_NAME_free(sk); 1442} 1443 1444STACK_OF(X509_NAME) *ssl_init_FindCAList(server_rec *s, 1445 apr_pool_t *ptemp, 1446 const char *ca_file, 1447 const char *ca_path) 1448{ 1449 STACK_OF(X509_NAME) *ca_list; 1450 1451 /* 1452 * Start with a empty stack/list where new 1453 * entries get added in sorted order. 1454 */ 1455 ca_list = sk_X509_NAME_new(ssl_init_FindCAList_X509NameCmp); 1456 1457 /* 1458 * Process CA certificate bundle file 1459 */ 1460 if (ca_file) { 1461 ssl_init_PushCAList(ca_list, s, ca_file); 1462 } 1463 1464 /* 1465 * Process CA certificate path files 1466 */ 1467 if (ca_path) { 1468 apr_dir_t *dir; 1469 apr_finfo_t direntry; 1470 apr_int32_t finfo_flags = APR_FINFO_TYPE|APR_FINFO_NAME; 1471 apr_status_t rv; 1472 1473 if ((rv = apr_dir_open(&dir, ca_path, ptemp)) != APR_SUCCESS) { 1474 ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, 1475 "Failed to open Certificate Path `%s'", 1476 ca_path); 1477 ssl_die(); 1478 } 1479 1480 while ((apr_dir_read(&direntry, finfo_flags, dir)) == APR_SUCCESS) { 1481 const char *file; 1482 if (direntry.filetype == APR_DIR) { 1483 continue; /* don't try to load directories */ 1484 } 1485 file = apr_pstrcat(ptemp, ca_path, "/", direntry.name, NULL); 1486 ssl_init_PushCAList(ca_list, s, file); 1487 } 1488 1489 apr_dir_close(dir); 1490 } 1491 1492 /* 1493 * Cleanup 1494 */ 1495 (void) sk_X509_NAME_set_cmp_func(ca_list, NULL); 1496 1497 return ca_list; 1498} 1499 1500void ssl_init_Child(apr_pool_t *p, server_rec *s) 1501{ 1502 SSLModConfigRec *mc = myModConfig(s); 1503 mc->pid = getpid(); /* only call getpid() once per-process */ 1504 1505 /* XXX: there should be an ap_srand() function */ 1506 srand((unsigned int)time(NULL)); 1507 1508 /* open the mutex lockfile */ 1509 ssl_mutex_reinit(s, p); 1510} 1511 1512#define MODSSL_CFG_ITEM_FREE(func, item) \ 1513 if (item) { \ 1514 func(item); \ 1515 item = NULL; \ 1516 } 1517 1518static void ssl_init_ctx_cleanup(modssl_ctx_t *mctx) 1519{ 1520 MODSSL_CFG_ITEM_FREE(X509_STORE_free, mctx->crl); 1521 1522 MODSSL_CFG_ITEM_FREE(SSL_CTX_free, mctx->ssl_ctx); 1523} 1524 1525static void ssl_init_ctx_cleanup_proxy(modssl_ctx_t *mctx) 1526{ 1527 ssl_init_ctx_cleanup(mctx); 1528 1529 if (mctx->pkp->certs) { 1530 int i = 0; 1531 int ncerts = sk_X509_INFO_num(mctx->pkp->certs); 1532 1533 if (mctx->pkp->ca_certs) { 1534 for (i = 0; i < ncerts; i++) { 1535 if (mctx->pkp->ca_certs[i] != NULL) { 1536 sk_X509_pop_free(mctx->pkp->ca_certs[i], X509_free); 1537 } 1538 } 1539 } 1540 1541 sk_X509_INFO_pop_free(mctx->pkp->certs, X509_INFO_free); 1542 mctx->pkp->certs = NULL; 1543 } 1544} 1545 1546static void ssl_init_ctx_cleanup_server(modssl_ctx_t *mctx) 1547{ 1548 int i; 1549 1550 ssl_init_ctx_cleanup(mctx); 1551 1552 for (i=0; i < SSL_AIDX_MAX; i++) { 1553 MODSSL_CFG_ITEM_FREE(X509_free, 1554 mctx->pks->certs[i]); 1555 1556 MODSSL_CFG_ITEM_FREE(EVP_PKEY_free, 1557 mctx->pks->keys[i]); 1558 } 1559} 1560 1561apr_status_t ssl_init_ModuleKill(void *data) 1562{ 1563 SSLSrvConfigRec *sc; 1564 server_rec *base_server = (server_rec *)data; 1565 server_rec *s; 1566 1567 /* 1568 * Drop the session cache and mutex 1569 */ 1570 ssl_scache_kill(base_server); 1571 1572 /* 1573 * Destroy the temporary keys and params 1574 */ 1575 ssl_tmp_keys_free(base_server); 1576 1577 /* 1578 * Free the non-pool allocated structures 1579 * in the per-server configurations 1580 */ 1581 for (s = base_server; s; s = s->next) { 1582 sc = mySrvConfig(s); 1583 1584 ssl_init_ctx_cleanup_proxy(sc->proxy); 1585 1586 ssl_init_ctx_cleanup_server(sc->server); 1587 } 1588 1589 return APR_SUCCESS; 1590} 1591 1592