1 /* 2 * SSL/TLS interface functions for OpenSSL 3 * Copyright (c) 2004-2011, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #include "includes.h" 16 17 #ifndef CONFIG_SMARTCARD 18 #ifndef OPENSSL_NO_ENGINE 19 #define OPENSSL_NO_ENGINE 20 #endif 21 #endif 22 23 #include <openssl/ssl.h> 24 #include <openssl/err.h> 25 #include <openssl/pkcs12.h> 26 #include <openssl/x509v3.h> 27 #ifndef OPENSSL_NO_ENGINE 28 #include <openssl/engine.h> 29 #endif /* OPENSSL_NO_ENGINE */ 30 31 #ifdef ANDROID 32 #include <openssl/pem.h> 33 #include "keystore_get.h" 34 #endif /* ANDROID */ 35 36 #include "common.h" 37 #include "crypto.h" 38 #include "tls.h" 39 40 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL 41 #define OPENSSL_d2i_TYPE const unsigned char ** 42 #else 43 #define OPENSSL_d2i_TYPE unsigned char ** 44 #endif 45 46 #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT 47 #ifdef SSL_OP_NO_TICKET 48 /* 49 * Session ticket override patch was merged into OpenSSL 0.9.9 tree on 50 * 2008-11-15. This version uses a bit different API compared to the old patch. 51 */ 52 #define CONFIG_OPENSSL_TICKET_OVERRIDE 53 #endif 54 #endif 55 56 static int tls_openssl_ref_count = 0; 57 58 struct tls_global { 59 void (*event_cb)(void *ctx, enum tls_event ev, 60 union tls_event_data *data); 61 void *cb_ctx; 62 int cert_in_cb; 63 }; 64 65 static struct tls_global *tls_global = NULL; 66 67 68 struct tls_connection { 69 SSL *ssl; 70 BIO *ssl_in, *ssl_out; 71 #ifndef OPENSSL_NO_ENGINE 72 ENGINE *engine; /* functional reference to the engine */ 73 EVP_PKEY *private_key; /* the private key if using engine */ 74 #endif /* OPENSSL_NO_ENGINE */ 75 char *subject_match, *altsubject_match; 76 int read_alerts, write_alerts, failed; 77 78 tls_session_ticket_cb session_ticket_cb; 79 void *session_ticket_cb_ctx; 80 81 /* SessionTicket received from OpenSSL hello_extension_cb (server) */ 82 u8 *session_ticket; 83 size_t session_ticket_len; 84 85 unsigned int ca_cert_verify:1; 86 unsigned int cert_probe:1; 87 unsigned int server_cert_only:1; 88 89 u8 srv_cert_hash[32]; 90 91 unsigned int flags; 92 }; 93 94 95 #ifdef CONFIG_NO_STDOUT_DEBUG 96 97 static void _tls_show_errors(void) 98 { 99 unsigned long err; 100 101 while ((err = ERR_get_error())) { 102 /* Just ignore the errors, since stdout is disabled */ 103 } 104 } 105 #define tls_show_errors(l, f, t) _tls_show_errors() 106 107 #else /* CONFIG_NO_STDOUT_DEBUG */ 108 109 static void tls_show_errors(int level, const char *func, const char *txt) 110 { 111 unsigned long err; 112 113 wpa_printf(level, "OpenSSL: %s - %s %s", 114 func, txt, ERR_error_string(ERR_get_error(), NULL)); 115 116 while ((err = ERR_get_error())) { 117 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s", 118 ERR_error_string(err, NULL)); 119 } 120 } 121 122 #endif /* CONFIG_NO_STDOUT_DEBUG */ 123 124 125 #ifdef CONFIG_NATIVE_WINDOWS 126 127 /* Windows CryptoAPI and access to certificate stores */ 128 #include <wincrypt.h> 129 130 #ifdef __MINGW32_VERSION 131 /* 132 * MinGW does not yet include all the needed definitions for CryptoAPI, so 133 * define here whatever extra is needed. 134 */ 135 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16) 136 #define CERT_STORE_READONLY_FLAG 0x00008000 137 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000 138 139 #endif /* __MINGW32_VERSION */ 140 141 142 struct cryptoapi_rsa_data { 143 const CERT_CONTEXT *cert; 144 HCRYPTPROV crypt_prov; 145 DWORD key_spec; 146 BOOL free_crypt_prov; 147 }; 148 149 150 static void cryptoapi_error(const char *msg) 151 { 152 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u", 153 msg, (unsigned int) GetLastError()); 154 } 155 156 157 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from, 158 unsigned char *to, RSA *rsa, int padding) 159 { 160 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 161 return 0; 162 } 163 164 165 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from, 166 unsigned char *to, RSA *rsa, int padding) 167 { 168 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 169 return 0; 170 } 171 172 173 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from, 174 unsigned char *to, RSA *rsa, int padding) 175 { 176 struct cryptoapi_rsa_data *priv = 177 (struct cryptoapi_rsa_data *) rsa->meth->app_data; 178 HCRYPTHASH hash; 179 DWORD hash_size, len, i; 180 unsigned char *buf = NULL; 181 int ret = 0; 182 183 if (priv == NULL) { 184 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 185 ERR_R_PASSED_NULL_PARAMETER); 186 return 0; 187 } 188 189 if (padding != RSA_PKCS1_PADDING) { 190 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 191 RSA_R_UNKNOWN_PADDING_TYPE); 192 return 0; 193 } 194 195 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) { 196 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported", 197 __func__); 198 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 199 RSA_R_INVALID_MESSAGE_LENGTH); 200 return 0; 201 } 202 203 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash)) 204 { 205 cryptoapi_error("CryptCreateHash failed"); 206 return 0; 207 } 208 209 len = sizeof(hash_size); 210 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len, 211 0)) { 212 cryptoapi_error("CryptGetHashParam failed"); 213 goto err; 214 } 215 216 if ((int) hash_size != flen) { 217 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)", 218 (unsigned) hash_size, flen); 219 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 220 RSA_R_INVALID_MESSAGE_LENGTH); 221 goto err; 222 } 223 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) { 224 cryptoapi_error("CryptSetHashParam failed"); 225 goto err; 226 } 227 228 len = RSA_size(rsa); 229 buf = os_malloc(len); 230 if (buf == NULL) { 231 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE); 232 goto err; 233 } 234 235 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) { 236 cryptoapi_error("CryptSignHash failed"); 237 goto err; 238 } 239 240 for (i = 0; i < len; i++) 241 to[i] = buf[len - i - 1]; 242 ret = len; 243 244 err: 245 os_free(buf); 246 CryptDestroyHash(hash); 247 248 return ret; 249 } 250 251 252 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from, 253 unsigned char *to, RSA *rsa, int padding) 254 { 255 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 256 return 0; 257 } 258 259 260 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv) 261 { 262 if (priv == NULL) 263 return; 264 if (priv->crypt_prov && priv->free_crypt_prov) 265 CryptReleaseContext(priv->crypt_prov, 0); 266 if (priv->cert) 267 CertFreeCertificateContext(priv->cert); 268 os_free(priv); 269 } 270 271 272 static int cryptoapi_finish(RSA *rsa) 273 { 274 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data); 275 os_free((void *) rsa->meth); 276 rsa->meth = NULL; 277 return 1; 278 } 279 280 281 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store) 282 { 283 HCERTSTORE cs; 284 const CERT_CONTEXT *ret = NULL; 285 286 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0, 287 store | CERT_STORE_OPEN_EXISTING_FLAG | 288 CERT_STORE_READONLY_FLAG, L"MY"); 289 if (cs == NULL) { 290 cryptoapi_error("Failed to open 'My system store'"); 291 return NULL; 292 } 293 294 if (strncmp(name, "cert://", 7) == 0) { 295 unsigned short wbuf[255]; 296 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255); 297 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING | 298 PKCS_7_ASN_ENCODING, 299 0, CERT_FIND_SUBJECT_STR, 300 wbuf, NULL); 301 } else if (strncmp(name, "hash://", 7) == 0) { 302 CRYPT_HASH_BLOB blob; 303 int len; 304 const char *hash = name + 7; 305 unsigned char *buf; 306 307 len = os_strlen(hash) / 2; 308 buf = os_malloc(len); 309 if (buf && hexstr2bin(hash, buf, len) == 0) { 310 blob.cbData = len; 311 blob.pbData = buf; 312 ret = CertFindCertificateInStore(cs, 313 X509_ASN_ENCODING | 314 PKCS_7_ASN_ENCODING, 315 0, CERT_FIND_HASH, 316 &blob, NULL); 317 } 318 os_free(buf); 319 } 320 321 CertCloseStore(cs, 0); 322 323 return ret; 324 } 325 326 327 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 328 { 329 X509 *cert = NULL; 330 RSA *rsa = NULL, *pub_rsa; 331 struct cryptoapi_rsa_data *priv; 332 RSA_METHOD *rsa_meth; 333 334 if (name == NULL || 335 (strncmp(name, "cert://", 7) != 0 && 336 strncmp(name, "hash://", 7) != 0)) 337 return -1; 338 339 priv = os_zalloc(sizeof(*priv)); 340 rsa_meth = os_zalloc(sizeof(*rsa_meth)); 341 if (priv == NULL || rsa_meth == NULL) { 342 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory " 343 "for CryptoAPI RSA method"); 344 os_free(priv); 345 os_free(rsa_meth); 346 return -1; 347 } 348 349 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER); 350 if (priv->cert == NULL) { 351 priv->cert = cryptoapi_find_cert( 352 name, CERT_SYSTEM_STORE_LOCAL_MACHINE); 353 } 354 if (priv->cert == NULL) { 355 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate " 356 "'%s'", name); 357 goto err; 358 } 359 360 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded, 361 priv->cert->cbCertEncoded); 362 if (cert == NULL) { 363 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER " 364 "encoding"); 365 goto err; 366 } 367 368 if (!CryptAcquireCertificatePrivateKey(priv->cert, 369 CRYPT_ACQUIRE_COMPARE_KEY_FLAG, 370 NULL, &priv->crypt_prov, 371 &priv->key_spec, 372 &priv->free_crypt_prov)) { 373 cryptoapi_error("Failed to acquire a private key for the " 374 "certificate"); 375 goto err; 376 } 377 378 rsa_meth->name = "Microsoft CryptoAPI RSA Method"; 379 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc; 380 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec; 381 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc; 382 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec; 383 rsa_meth->finish = cryptoapi_finish; 384 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK; 385 rsa_meth->app_data = (char *) priv; 386 387 rsa = RSA_new(); 388 if (rsa == NULL) { 389 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, 390 ERR_R_MALLOC_FAILURE); 391 goto err; 392 } 393 394 if (!SSL_use_certificate(ssl, cert)) { 395 RSA_free(rsa); 396 rsa = NULL; 397 goto err; 398 } 399 pub_rsa = cert->cert_info->key->pkey->pkey.rsa; 400 X509_free(cert); 401 cert = NULL; 402 403 rsa->n = BN_dup(pub_rsa->n); 404 rsa->e = BN_dup(pub_rsa->e); 405 if (!RSA_set_method(rsa, rsa_meth)) 406 goto err; 407 408 if (!SSL_use_RSAPrivateKey(ssl, rsa)) 409 goto err; 410 RSA_free(rsa); 411 412 return 0; 413 414 err: 415 if (cert) 416 X509_free(cert); 417 if (rsa) 418 RSA_free(rsa); 419 else { 420 os_free(rsa_meth); 421 cryptoapi_free_data(priv); 422 } 423 return -1; 424 } 425 426 427 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name) 428 { 429 HCERTSTORE cs; 430 PCCERT_CONTEXT ctx = NULL; 431 X509 *cert; 432 char buf[128]; 433 const char *store; 434 #ifdef UNICODE 435 WCHAR *wstore; 436 #endif /* UNICODE */ 437 438 if (name == NULL || strncmp(name, "cert_store://", 13) != 0) 439 return -1; 440 441 store = name + 13; 442 #ifdef UNICODE 443 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR)); 444 if (wstore == NULL) 445 return -1; 446 wsprintf(wstore, L"%S", store); 447 cs = CertOpenSystemStore(0, wstore); 448 os_free(wstore); 449 #else /* UNICODE */ 450 cs = CertOpenSystemStore(0, store); 451 #endif /* UNICODE */ 452 if (cs == NULL) { 453 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store " 454 "'%s': error=%d", __func__, store, 455 (int) GetLastError()); 456 return -1; 457 } 458 459 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) { 460 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded, 461 ctx->cbCertEncoded); 462 if (cert == NULL) { 463 wpa_printf(MSG_INFO, "CryptoAPI: Could not process " 464 "X509 DER encoding for CA cert"); 465 continue; 466 } 467 468 X509_NAME_oneline(X509_get_subject_name(cert), buf, 469 sizeof(buf)); 470 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for " 471 "system certificate store: subject='%s'", buf); 472 473 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 474 tls_show_errors(MSG_WARNING, __func__, 475 "Failed to add ca_cert to OpenSSL " 476 "certificate store"); 477 } 478 479 X509_free(cert); 480 } 481 482 if (!CertCloseStore(cs, 0)) { 483 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store " 484 "'%s': error=%d", __func__, name + 13, 485 (int) GetLastError()); 486 } 487 488 return 0; 489 } 490 491 492 #else /* CONFIG_NATIVE_WINDOWS */ 493 494 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 495 { 496 return -1; 497 } 498 499 #endif /* CONFIG_NATIVE_WINDOWS */ 500 501 502 static void ssl_info_cb(const SSL *ssl, int where, int ret) 503 { 504 const char *str; 505 int w; 506 507 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret); 508 w = where & ~SSL_ST_MASK; 509 if (w & SSL_ST_CONNECT) 510 str = "SSL_connect"; 511 else if (w & SSL_ST_ACCEPT) 512 str = "SSL_accept"; 513 else 514 str = "undefined"; 515 516 if (where & SSL_CB_LOOP) { 517 wpa_printf(MSG_DEBUG, "SSL: %s:%s", 518 str, SSL_state_string_long(ssl)); 519 } else if (where & SSL_CB_ALERT) { 520 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", 521 where & SSL_CB_READ ? 522 "read (remote end reported an error)" : 523 "write (local SSL3 detected an error)", 524 SSL_alert_type_string_long(ret), 525 SSL_alert_desc_string_long(ret)); 526 if ((ret >> 8) == SSL3_AL_FATAL) { 527 struct tls_connection *conn = 528 SSL_get_app_data((SSL *) ssl); 529 if (where & SSL_CB_READ) 530 conn->read_alerts++; 531 else 532 conn->write_alerts++; 533 } 534 } else if (where & SSL_CB_EXIT && ret <= 0) { 535 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", 536 str, ret == 0 ? "failed" : "error", 537 SSL_state_string_long(ssl)); 538 } 539 } 540 541 542 #ifndef OPENSSL_NO_ENGINE 543 /** 544 * tls_engine_load_dynamic_generic - load any openssl engine 545 * @pre: an array of commands and values that load an engine initialized 546 * in the engine specific function 547 * @post: an array of commands and values that initialize an already loaded 548 * engine (or %NULL if not required) 549 * @id: the engine id of the engine to load (only required if post is not %NULL 550 * 551 * This function is a generic function that loads any openssl engine. 552 * 553 * Returns: 0 on success, -1 on failure 554 */ 555 static int tls_engine_load_dynamic_generic(const char *pre[], 556 const char *post[], const char *id) 557 { 558 ENGINE *engine; 559 const char *dynamic_id = "dynamic"; 560 561 engine = ENGINE_by_id(id); 562 if (engine) { 563 ENGINE_free(engine); 564 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already " 565 "available", id); 566 return 0; 567 } 568 ERR_clear_error(); 569 570 engine = ENGINE_by_id(dynamic_id); 571 if (engine == NULL) { 572 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 573 dynamic_id, 574 ERR_error_string(ERR_get_error(), NULL)); 575 return -1; 576 } 577 578 /* Perform the pre commands. This will load the engine. */ 579 while (pre && pre[0]) { 580 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]); 581 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) { 582 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: " 583 "%s %s [%s]", pre[0], pre[1], 584 ERR_error_string(ERR_get_error(), NULL)); 585 ENGINE_free(engine); 586 return -1; 587 } 588 pre += 2; 589 } 590 591 /* 592 * Free the reference to the "dynamic" engine. The loaded engine can 593 * now be looked up using ENGINE_by_id(). 594 */ 595 ENGINE_free(engine); 596 597 engine = ENGINE_by_id(id); 598 if (engine == NULL) { 599 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 600 id, ERR_error_string(ERR_get_error(), NULL)); 601 return -1; 602 } 603 604 while (post && post[0]) { 605 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]); 606 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) { 607 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:" 608 " %s %s [%s]", post[0], post[1], 609 ERR_error_string(ERR_get_error(), NULL)); 610 ENGINE_remove(engine); 611 ENGINE_free(engine); 612 return -1; 613 } 614 post += 2; 615 } 616 ENGINE_free(engine); 617 618 return 0; 619 } 620 621 622 /** 623 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc 624 * @pkcs11_so_path: pksc11_so_path from the configuration 625 * @pcks11_module_path: pkcs11_module_path from the configuration 626 */ 627 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path, 628 const char *pkcs11_module_path) 629 { 630 char *engine_id = "pkcs11"; 631 const char *pre_cmd[] = { 632 "SO_PATH", NULL /* pkcs11_so_path */, 633 "ID", NULL /* engine_id */, 634 "LIST_ADD", "1", 635 /* "NO_VCHECK", "1", */ 636 "LOAD", NULL, 637 NULL, NULL 638 }; 639 const char *post_cmd[] = { 640 "MODULE_PATH", NULL /* pkcs11_module_path */, 641 NULL, NULL 642 }; 643 644 if (!pkcs11_so_path || !pkcs11_module_path) 645 return 0; 646 647 pre_cmd[1] = pkcs11_so_path; 648 pre_cmd[3] = engine_id; 649 post_cmd[1] = pkcs11_module_path; 650 651 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s", 652 pkcs11_so_path); 653 654 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id); 655 } 656 657 658 /** 659 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc 660 * @opensc_so_path: opensc_so_path from the configuration 661 */ 662 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path) 663 { 664 char *engine_id = "opensc"; 665 const char *pre_cmd[] = { 666 "SO_PATH", NULL /* opensc_so_path */, 667 "ID", NULL /* engine_id */, 668 "LIST_ADD", "1", 669 "LOAD", NULL, 670 NULL, NULL 671 }; 672 673 if (!opensc_so_path) 674 return 0; 675 676 pre_cmd[1] = opensc_so_path; 677 pre_cmd[3] = engine_id; 678 679 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s", 680 opensc_so_path); 681 682 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id); 683 } 684 #endif /* OPENSSL_NO_ENGINE */ 685 686 687 void * tls_init(const struct tls_config *conf) 688 { 689 SSL_CTX *ssl; 690 691 if (tls_openssl_ref_count == 0) { 692 tls_global = os_zalloc(sizeof(*tls_global)); 693 if (tls_global == NULL) 694 return NULL; 695 if (conf) { 696 tls_global->event_cb = conf->event_cb; 697 tls_global->cb_ctx = conf->cb_ctx; 698 tls_global->cert_in_cb = conf->cert_in_cb; 699 } 700 701 #ifdef CONFIG_FIPS 702 #ifdef OPENSSL_FIPS 703 if (conf && conf->fips_mode) { 704 if (!FIPS_mode_set(1)) { 705 wpa_printf(MSG_ERROR, "Failed to enable FIPS " 706 "mode"); 707 ERR_load_crypto_strings(); 708 ERR_print_errors_fp(stderr); 709 return NULL; 710 } else 711 wpa_printf(MSG_INFO, "Running in FIPS mode"); 712 } 713 #else /* OPENSSL_FIPS */ 714 if (conf && conf->fips_mode) { 715 wpa_printf(MSG_ERROR, "FIPS mode requested, but not " 716 "supported"); 717 return NULL; 718 } 719 #endif /* OPENSSL_FIPS */ 720 #endif /* CONFIG_FIPS */ 721 SSL_load_error_strings(); 722 SSL_library_init(); 723 #if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256) 724 EVP_add_digest(EVP_sha256()); 725 #endif /* OPENSSL_NO_SHA256 */ 726 /* TODO: if /dev/urandom is available, PRNG is seeded 727 * automatically. If this is not the case, random data should 728 * be added here. */ 729 730 #ifdef PKCS12_FUNCS 731 #ifndef OPENSSL_NO_RC2 732 /* 733 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it. 734 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8 735 * versions, but it looks like OpenSSL 1.0.0 does not do that 736 * anymore. 737 */ 738 EVP_add_cipher(EVP_rc2_40_cbc()); 739 #endif /* OPENSSL_NO_RC2 */ 740 PKCS12_PBE_add(); 741 #endif /* PKCS12_FUNCS */ 742 } 743 tls_openssl_ref_count++; 744 745 ssl = SSL_CTX_new(TLSv1_method()); 746 if (ssl == NULL) 747 return NULL; 748 749 SSL_CTX_set_info_callback(ssl, ssl_info_cb); 750 751 #ifndef OPENSSL_NO_ENGINE 752 if (conf && 753 (conf->opensc_engine_path || conf->pkcs11_engine_path || 754 conf->pkcs11_module_path)) { 755 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine"); 756 ERR_load_ENGINE_strings(); 757 ENGINE_load_dynamic(); 758 759 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) || 760 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path, 761 conf->pkcs11_module_path)) { 762 tls_deinit(ssl); 763 return NULL; 764 } 765 } 766 #endif /* OPENSSL_NO_ENGINE */ 767 768 return ssl; 769 } 770 771 772 void tls_deinit(void *ssl_ctx) 773 { 774 SSL_CTX *ssl = ssl_ctx; 775 SSL_CTX_free(ssl); 776 777 tls_openssl_ref_count--; 778 if (tls_openssl_ref_count == 0) { 779 #ifndef OPENSSL_NO_ENGINE 780 ENGINE_cleanup(); 781 #endif /* OPENSSL_NO_ENGINE */ 782 CRYPTO_cleanup_all_ex_data(); 783 ERR_remove_state(0); 784 ERR_free_strings(); 785 EVP_cleanup(); 786 os_free(tls_global); 787 tls_global = NULL; 788 } 789 } 790 791 792 static int tls_engine_init(struct tls_connection *conn, const char *engine_id, 793 const char *pin, const char *key_id, 794 const char *cert_id, const char *ca_cert_id) 795 { 796 #ifndef OPENSSL_NO_ENGINE 797 int ret = -1; 798 if (engine_id == NULL) { 799 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set"); 800 return -1; 801 } 802 if (pin == NULL) { 803 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set"); 804 return -1; 805 } 806 if (key_id == NULL) { 807 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set"); 808 return -1; 809 } 810 811 ERR_clear_error(); 812 conn->engine = ENGINE_by_id(engine_id); 813 if (!conn->engine) { 814 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]", 815 engine_id, ERR_error_string(ERR_get_error(), NULL)); 816 goto err; 817 } 818 if (ENGINE_init(conn->engine) != 1) { 819 wpa_printf(MSG_ERROR, "ENGINE: engine init failed " 820 "(engine: %s) [%s]", engine_id, 821 ERR_error_string(ERR_get_error(), NULL)); 822 goto err; 823 } 824 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized"); 825 826 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) { 827 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]", 828 ERR_error_string(ERR_get_error(), NULL)); 829 goto err; 830 } 831 /* load private key first in-case PIN is required for cert */ 832 conn->private_key = ENGINE_load_private_key(conn->engine, 833 key_id, NULL, NULL); 834 if (!conn->private_key) { 835 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id" 836 " '%s' [%s]", key_id, 837 ERR_error_string(ERR_get_error(), NULL)); 838 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 839 goto err; 840 } 841 842 /* handle a certificate and/or CA certificate */ 843 if (cert_id || ca_cert_id) { 844 const char *cmd_name = "LOAD_CERT_CTRL"; 845 846 /* test if the engine supports a LOAD_CERT_CTRL */ 847 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME, 848 0, (void *)cmd_name, NULL)) { 849 wpa_printf(MSG_ERROR, "ENGINE: engine does not support" 850 " loading certificates"); 851 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 852 goto err; 853 } 854 } 855 856 return 0; 857 858 err: 859 if (conn->engine) { 860 ENGINE_free(conn->engine); 861 conn->engine = NULL; 862 } 863 864 if (conn->private_key) { 865 EVP_PKEY_free(conn->private_key); 866 conn->private_key = NULL; 867 } 868 869 return ret; 870 #else /* OPENSSL_NO_ENGINE */ 871 return 0; 872 #endif /* OPENSSL_NO_ENGINE */ 873 } 874 875 876 static void tls_engine_deinit(struct tls_connection *conn) 877 { 878 #ifndef OPENSSL_NO_ENGINE 879 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit"); 880 if (conn->private_key) { 881 EVP_PKEY_free(conn->private_key); 882 conn->private_key = NULL; 883 } 884 if (conn->engine) { 885 ENGINE_finish(conn->engine); 886 conn->engine = NULL; 887 } 888 #endif /* OPENSSL_NO_ENGINE */ 889 } 890 891 892 int tls_get_errors(void *ssl_ctx) 893 { 894 int count = 0; 895 unsigned long err; 896 897 while ((err = ERR_get_error())) { 898 wpa_printf(MSG_INFO, "TLS - SSL error: %s", 899 ERR_error_string(err, NULL)); 900 count++; 901 } 902 903 return count; 904 } 905 906 struct tls_connection * tls_connection_init(void *ssl_ctx) 907 { 908 SSL_CTX *ssl = ssl_ctx; 909 struct tls_connection *conn; 910 long options; 911 912 conn = os_zalloc(sizeof(*conn)); 913 if (conn == NULL) 914 return NULL; 915 conn->ssl = SSL_new(ssl); 916 if (conn->ssl == NULL) { 917 tls_show_errors(MSG_INFO, __func__, 918 "Failed to initialize new SSL connection"); 919 os_free(conn); 920 return NULL; 921 } 922 923 SSL_set_app_data(conn->ssl, conn); 924 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | 925 SSL_OP_SINGLE_DH_USE; 926 #ifdef SSL_OP_NO_COMPRESSION 927 options |= SSL_OP_NO_COMPRESSION; 928 #endif /* SSL_OP_NO_COMPRESSION */ 929 SSL_set_options(conn->ssl, options); 930 931 conn->ssl_in = BIO_new(BIO_s_mem()); 932 if (!conn->ssl_in) { 933 tls_show_errors(MSG_INFO, __func__, 934 "Failed to create a new BIO for ssl_in"); 935 SSL_free(conn->ssl); 936 os_free(conn); 937 return NULL; 938 } 939 940 conn->ssl_out = BIO_new(BIO_s_mem()); 941 if (!conn->ssl_out) { 942 tls_show_errors(MSG_INFO, __func__, 943 "Failed to create a new BIO for ssl_out"); 944 SSL_free(conn->ssl); 945 BIO_free(conn->ssl_in); 946 os_free(conn); 947 return NULL; 948 } 949 950 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out); 951 952 return conn; 953 } 954 955 956 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) 957 { 958 if (conn == NULL) 959 return; 960 SSL_free(conn->ssl); 961 tls_engine_deinit(conn); 962 os_free(conn->subject_match); 963 os_free(conn->altsubject_match); 964 os_free(conn->session_ticket); 965 os_free(conn); 966 } 967 968 969 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) 970 { 971 return conn ? SSL_is_init_finished(conn->ssl) : 0; 972 } 973 974 975 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) 976 { 977 if (conn == NULL) 978 return -1; 979 980 /* Shutdown previous TLS connection without notifying the peer 981 * because the connection was already terminated in practice 982 * and "close notify" shutdown alert would confuse AS. */ 983 SSL_set_quiet_shutdown(conn->ssl, 1); 984 SSL_shutdown(conn->ssl); 985 return 0; 986 } 987 988 989 static int tls_match_altsubject_component(X509 *cert, int type, 990 const char *value, size_t len) 991 { 992 GENERAL_NAME *gen; 993 void *ext; 994 int i, found = 0; 995 996 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); 997 998 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { 999 gen = sk_GENERAL_NAME_value(ext, i); 1000 if (gen->type != type) 1001 continue; 1002 if (os_strlen((char *) gen->d.ia5->data) == len && 1003 os_memcmp(value, gen->d.ia5->data, len) == 0) 1004 found++; 1005 } 1006 1007 return found; 1008 } 1009 1010 1011 static int tls_match_altsubject(X509 *cert, const char *match) 1012 { 1013 int type; 1014 const char *pos, *end; 1015 size_t len; 1016 1017 pos = match; 1018 do { 1019 if (os_strncmp(pos, "EMAIL:", 6) == 0) { 1020 type = GEN_EMAIL; 1021 pos += 6; 1022 } else if (os_strncmp(pos, "DNS:", 4) == 0) { 1023 type = GEN_DNS; 1024 pos += 4; 1025 } else if (os_strncmp(pos, "URI:", 4) == 0) { 1026 type = GEN_URI; 1027 pos += 4; 1028 } else { 1029 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName " 1030 "match '%s'", pos); 1031 return 0; 1032 } 1033 end = os_strchr(pos, ';'); 1034 while (end) { 1035 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 || 1036 os_strncmp(end + 1, "DNS:", 4) == 0 || 1037 os_strncmp(end + 1, "URI:", 4) == 0) 1038 break; 1039 end = os_strchr(end + 1, ';'); 1040 } 1041 if (end) 1042 len = end - pos; 1043 else 1044 len = os_strlen(pos); 1045 if (tls_match_altsubject_component(cert, type, pos, len) > 0) 1046 return 1; 1047 pos = end + 1; 1048 } while (end); 1049 1050 return 0; 1051 } 1052 1053 1054 static enum tls_fail_reason openssl_tls_fail_reason(int err) 1055 { 1056 switch (err) { 1057 case X509_V_ERR_CERT_REVOKED: 1058 return TLS_FAIL_REVOKED; 1059 case X509_V_ERR_CERT_NOT_YET_VALID: 1060 case X509_V_ERR_CRL_NOT_YET_VALID: 1061 return TLS_FAIL_NOT_YET_VALID; 1062 case X509_V_ERR_CERT_HAS_EXPIRED: 1063 case X509_V_ERR_CRL_HAS_EXPIRED: 1064 return TLS_FAIL_EXPIRED; 1065 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 1066 case X509_V_ERR_UNABLE_TO_GET_CRL: 1067 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 1068 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 1069 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 1070 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 1071 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 1072 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 1073 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 1074 case X509_V_ERR_INVALID_CA: 1075 return TLS_FAIL_UNTRUSTED; 1076 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 1077 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 1078 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 1079 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 1080 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 1081 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 1082 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 1083 case X509_V_ERR_CERT_UNTRUSTED: 1084 case X509_V_ERR_CERT_REJECTED: 1085 return TLS_FAIL_BAD_CERTIFICATE; 1086 default: 1087 return TLS_FAIL_UNSPECIFIED; 1088 } 1089 } 1090 1091 1092 static struct wpabuf * get_x509_cert(X509 *cert) 1093 { 1094 struct wpabuf *buf; 1095 u8 *tmp; 1096 1097 int cert_len = i2d_X509(cert, NULL); 1098 if (cert_len <= 0) 1099 return NULL; 1100 1101 buf = wpabuf_alloc(cert_len); 1102 if (buf == NULL) 1103 return NULL; 1104 1105 tmp = wpabuf_put(buf, cert_len); 1106 i2d_X509(cert, &tmp); 1107 return buf; 1108 } 1109 1110 1111 static void openssl_tls_fail_event(struct tls_connection *conn, 1112 X509 *err_cert, int err, int depth, 1113 const char *subject, const char *err_str, 1114 enum tls_fail_reason reason) 1115 { 1116 union tls_event_data ev; 1117 struct wpabuf *cert = NULL; 1118 1119 if (tls_global->event_cb == NULL) 1120 return; 1121 1122 cert = get_x509_cert(err_cert); 1123 os_memset(&ev, 0, sizeof(ev)); 1124 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ? 1125 reason : openssl_tls_fail_reason(err); 1126 ev.cert_fail.depth = depth; 1127 ev.cert_fail.subject = subject; 1128 ev.cert_fail.reason_txt = err_str; 1129 ev.cert_fail.cert = cert; 1130 tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); 1131 wpabuf_free(cert); 1132 } 1133 1134 1135 static void openssl_tls_cert_event(struct tls_connection *conn, 1136 X509 *err_cert, int depth, 1137 const char *subject) 1138 { 1139 struct wpabuf *cert = NULL; 1140 union tls_event_data ev; 1141 #ifdef CONFIG_SHA256 1142 u8 hash[32]; 1143 #endif /* CONFIG_SHA256 */ 1144 1145 if (tls_global->event_cb == NULL) 1146 return; 1147 1148 os_memset(&ev, 0, sizeof(ev)); 1149 if (conn->cert_probe || tls_global->cert_in_cb) { 1150 cert = get_x509_cert(err_cert); 1151 ev.peer_cert.cert = cert; 1152 } 1153 #ifdef CONFIG_SHA256 1154 if (cert) { 1155 const u8 *addr[1]; 1156 size_t len[1]; 1157 addr[0] = wpabuf_head(cert); 1158 len[0] = wpabuf_len(cert); 1159 if (sha256_vector(1, addr, len, hash) == 0) { 1160 ev.peer_cert.hash = hash; 1161 ev.peer_cert.hash_len = sizeof(hash); 1162 } 1163 } 1164 #endif /* CONFIG_SHA256 */ 1165 ev.peer_cert.depth = depth; 1166 ev.peer_cert.subject = subject; 1167 tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev); 1168 wpabuf_free(cert); 1169 } 1170 1171 1172 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) 1173 { 1174 char buf[256]; 1175 X509 *err_cert; 1176 int err, depth; 1177 SSL *ssl; 1178 struct tls_connection *conn; 1179 char *match, *altmatch; 1180 const char *err_str; 1181 1182 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); 1183 err = X509_STORE_CTX_get_error(x509_ctx); 1184 depth = X509_STORE_CTX_get_error_depth(x509_ctx); 1185 ssl = X509_STORE_CTX_get_ex_data(x509_ctx, 1186 SSL_get_ex_data_X509_STORE_CTX_idx()); 1187 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); 1188 1189 conn = SSL_get_app_data(ssl); 1190 if (conn == NULL) 1191 return 0; 1192 match = conn->subject_match; 1193 altmatch = conn->altsubject_match; 1194 1195 if (!preverify_ok && !conn->ca_cert_verify) 1196 preverify_ok = 1; 1197 if (!preverify_ok && depth > 0 && conn->server_cert_only) 1198 preverify_ok = 1; 1199 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) && 1200 (err == X509_V_ERR_CERT_HAS_EXPIRED || 1201 err == X509_V_ERR_CERT_NOT_YET_VALID)) { 1202 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity " 1203 "time mismatch"); 1204 preverify_ok = 1; 1205 } 1206 1207 err_str = X509_verify_cert_error_string(err); 1208 1209 #ifdef CONFIG_SHA256 1210 if (preverify_ok && depth == 0 && conn->server_cert_only) { 1211 struct wpabuf *cert; 1212 cert = get_x509_cert(err_cert); 1213 if (!cert) { 1214 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch " 1215 "server certificate data"); 1216 preverify_ok = 0; 1217 } else { 1218 u8 hash[32]; 1219 const u8 *addr[1]; 1220 size_t len[1]; 1221 addr[0] = wpabuf_head(cert); 1222 len[0] = wpabuf_len(cert); 1223 if (sha256_vector(1, addr, len, hash) < 0 || 1224 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) { 1225 err_str = "Server certificate mismatch"; 1226 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN; 1227 preverify_ok = 0; 1228 } 1229 wpabuf_free(cert); 1230 } 1231 } 1232 #endif /* CONFIG_SHA256 */ 1233 1234 if (!preverify_ok) { 1235 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," 1236 " error %d (%s) depth %d for '%s'", err, err_str, 1237 depth, buf); 1238 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1239 err_str, TLS_FAIL_UNSPECIFIED); 1240 return preverify_ok; 1241 } 1242 1243 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d " 1244 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'", 1245 preverify_ok, err, err_str, 1246 conn->ca_cert_verify, depth, buf); 1247 if (depth == 0 && match && os_strstr(buf, match) == NULL) { 1248 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " 1249 "match with '%s'", buf, match); 1250 preverify_ok = 0; 1251 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1252 "Subject mismatch", 1253 TLS_FAIL_SUBJECT_MISMATCH); 1254 } else if (depth == 0 && altmatch && 1255 !tls_match_altsubject(err_cert, altmatch)) { 1256 wpa_printf(MSG_WARNING, "TLS: altSubjectName match " 1257 "'%s' not found", altmatch); 1258 preverify_ok = 0; 1259 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1260 "AltSubject mismatch", 1261 TLS_FAIL_ALTSUBJECT_MISMATCH); 1262 } else 1263 openssl_tls_cert_event(conn, err_cert, depth, buf); 1264 1265 if (conn->cert_probe && preverify_ok && depth == 0) { 1266 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate " 1267 "on probe-only run"); 1268 preverify_ok = 0; 1269 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1270 "Server certificate chain probe", 1271 TLS_FAIL_SERVER_CHAIN_PROBE); 1272 } 1273 1274 return preverify_ok; 1275 } 1276 1277 1278 #ifndef OPENSSL_NO_STDIO 1279 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert) 1280 { 1281 SSL_CTX *ssl_ctx = _ssl_ctx; 1282 X509_LOOKUP *lookup; 1283 int ret = 0; 1284 1285 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store, 1286 X509_LOOKUP_file()); 1287 if (lookup == NULL) { 1288 tls_show_errors(MSG_WARNING, __func__, 1289 "Failed add lookup for X509 store"); 1290 return -1; 1291 } 1292 1293 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) { 1294 unsigned long err = ERR_peek_error(); 1295 tls_show_errors(MSG_WARNING, __func__, 1296 "Failed load CA in DER format"); 1297 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1298 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1299 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1300 "cert already in hash table error", 1301 __func__); 1302 } else 1303 ret = -1; 1304 } 1305 1306 return ret; 1307 } 1308 #endif /* OPENSSL_NO_STDIO */ 1309 1310 1311 #ifdef ANDROID 1312 static BIO * BIO_from_keystore(const char *key) 1313 { 1314 BIO *bio = NULL; 1315 char value[KEYSTORE_MESSAGE_SIZE]; 1316 int length = keystore_get(key, strlen(key), value); 1317 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL) 1318 BIO_write(bio, value, length); 1319 return bio; 1320 } 1321 #endif /* ANDROID */ 1322 1323 1324 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn, 1325 const char *ca_cert, const u8 *ca_cert_blob, 1326 size_t ca_cert_blob_len, const char *ca_path) 1327 { 1328 SSL_CTX *ssl_ctx = _ssl_ctx; 1329 1330 /* 1331 * Remove previously configured trusted CA certificates before adding 1332 * new ones. 1333 */ 1334 X509_STORE_free(ssl_ctx->cert_store); 1335 ssl_ctx->cert_store = X509_STORE_new(); 1336 if (ssl_ctx->cert_store == NULL) { 1337 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 1338 "certificate store", __func__); 1339 return -1; 1340 } 1341 1342 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1343 conn->ca_cert_verify = 1; 1344 1345 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) { 1346 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate " 1347 "chain"); 1348 conn->cert_probe = 1; 1349 conn->ca_cert_verify = 0; 1350 return 0; 1351 } 1352 1353 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) { 1354 #ifdef CONFIG_SHA256 1355 const char *pos = ca_cert + 7; 1356 if (os_strncmp(pos, "server/sha256/", 14) != 0) { 1357 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert " 1358 "hash value '%s'", ca_cert); 1359 return -1; 1360 } 1361 pos += 14; 1362 if (os_strlen(pos) != 32 * 2) { 1363 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 " 1364 "hash length in ca_cert '%s'", ca_cert); 1365 return -1; 1366 } 1367 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) { 1368 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash " 1369 "value in ca_cert '%s'", ca_cert); 1370 return -1; 1371 } 1372 conn->server_cert_only = 1; 1373 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server " 1374 "certificate match"); 1375 return 0; 1376 #else /* CONFIG_SHA256 */ 1377 wpa_printf(MSG_INFO, "No SHA256 included in the build - " 1378 "cannot validate server certificate hash"); 1379 return -1; 1380 #endif /* CONFIG_SHA256 */ 1381 } 1382 1383 if (ca_cert_blob) { 1384 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob, 1385 ca_cert_blob_len); 1386 if (cert == NULL) { 1387 tls_show_errors(MSG_WARNING, __func__, 1388 "Failed to parse ca_cert_blob"); 1389 return -1; 1390 } 1391 1392 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 1393 unsigned long err = ERR_peek_error(); 1394 tls_show_errors(MSG_WARNING, __func__, 1395 "Failed to add ca_cert_blob to " 1396 "certificate store"); 1397 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1398 ERR_GET_REASON(err) == 1399 X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1400 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1401 "cert already in hash table error", 1402 __func__); 1403 } else { 1404 X509_free(cert); 1405 return -1; 1406 } 1407 } 1408 X509_free(cert); 1409 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob " 1410 "to certificate store", __func__); 1411 return 0; 1412 } 1413 1414 #ifdef ANDROID 1415 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) { 1416 BIO *bio = BIO_from_keystore(&ca_cert[11]); 1417 STACK_OF(X509_INFO) *stack = NULL; 1418 int i; 1419 1420 if (bio) { 1421 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL); 1422 BIO_free(bio); 1423 } 1424 if (!stack) 1425 return -1; 1426 1427 for (i = 0; i < sk_X509_INFO_num(stack); ++i) { 1428 X509_INFO *info = sk_X509_INFO_value(stack, i); 1429 if (info->x509) { 1430 X509_STORE_add_cert(ssl_ctx->cert_store, 1431 info->x509); 1432 } 1433 if (info->crl) { 1434 X509_STORE_add_crl(ssl_ctx->cert_store, 1435 info->crl); 1436 } 1437 } 1438 sk_X509_INFO_pop_free(stack, X509_INFO_free); 1439 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1440 return 0; 1441 } 1442 #endif /* ANDROID */ 1443 1444 #ifdef CONFIG_NATIVE_WINDOWS 1445 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) == 1446 0) { 1447 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from " 1448 "system certificate store"); 1449 return 0; 1450 } 1451 #endif /* CONFIG_NATIVE_WINDOWS */ 1452 1453 if (ca_cert || ca_path) { 1454 #ifndef OPENSSL_NO_STDIO 1455 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) != 1456 1) { 1457 tls_show_errors(MSG_WARNING, __func__, 1458 "Failed to load root certificates"); 1459 if (ca_cert && 1460 tls_load_ca_der(ssl_ctx, ca_cert) == 0) { 1461 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded " 1462 "DER format CA certificate", 1463 __func__); 1464 } else 1465 return -1; 1466 } else { 1467 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 1468 "certificate(s) loaded"); 1469 tls_get_errors(ssl_ctx); 1470 } 1471 #else /* OPENSSL_NO_STDIO */ 1472 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 1473 __func__); 1474 return -1; 1475 #endif /* OPENSSL_NO_STDIO */ 1476 } else { 1477 /* No ca_cert configured - do not try to verify server 1478 * certificate */ 1479 conn->ca_cert_verify = 0; 1480 } 1481 1482 return 0; 1483 } 1484 1485 1486 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert) 1487 { 1488 if (ca_cert) { 1489 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1) 1490 { 1491 tls_show_errors(MSG_WARNING, __func__, 1492 "Failed to load root certificates"); 1493 return -1; 1494 } 1495 1496 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 1497 "certificate(s) loaded"); 1498 1499 #ifndef OPENSSL_NO_STDIO 1500 /* Add the same CAs to the client certificate requests */ 1501 SSL_CTX_set_client_CA_list(ssl_ctx, 1502 SSL_load_client_CA_file(ca_cert)); 1503 #endif /* OPENSSL_NO_STDIO */ 1504 } 1505 1506 return 0; 1507 } 1508 1509 1510 int tls_global_set_verify(void *ssl_ctx, int check_crl) 1511 { 1512 int flags; 1513 1514 if (check_crl) { 1515 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx); 1516 if (cs == NULL) { 1517 tls_show_errors(MSG_INFO, __func__, "Failed to get " 1518 "certificate store when enabling " 1519 "check_crl"); 1520 return -1; 1521 } 1522 flags = X509_V_FLAG_CRL_CHECK; 1523 if (check_crl == 2) 1524 flags |= X509_V_FLAG_CRL_CHECK_ALL; 1525 X509_STORE_set_flags(cs, flags); 1526 } 1527 return 0; 1528 } 1529 1530 1531 static int tls_connection_set_subject_match(struct tls_connection *conn, 1532 const char *subject_match, 1533 const char *altsubject_match) 1534 { 1535 os_free(conn->subject_match); 1536 conn->subject_match = NULL; 1537 if (subject_match) { 1538 conn->subject_match = os_strdup(subject_match); 1539 if (conn->subject_match == NULL) 1540 return -1; 1541 } 1542 1543 os_free(conn->altsubject_match); 1544 conn->altsubject_match = NULL; 1545 if (altsubject_match) { 1546 conn->altsubject_match = os_strdup(altsubject_match); 1547 if (conn->altsubject_match == NULL) 1548 return -1; 1549 } 1550 1551 return 0; 1552 } 1553 1554 1555 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, 1556 int verify_peer) 1557 { 1558 static int counter = 0; 1559 1560 if (conn == NULL) 1561 return -1; 1562 1563 if (verify_peer) { 1564 conn->ca_cert_verify = 1; 1565 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER | 1566 SSL_VERIFY_FAIL_IF_NO_PEER_CERT | 1567 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb); 1568 } else { 1569 conn->ca_cert_verify = 0; 1570 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL); 1571 } 1572 1573 SSL_set_accept_state(conn->ssl); 1574 1575 /* 1576 * Set session id context in order to avoid fatal errors when client 1577 * tries to resume a session. However, set the context to a unique 1578 * value in order to effectively disable session resumption for now 1579 * since not all areas of the server code are ready for it (e.g., 1580 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS 1581 * handshake). 1582 */ 1583 counter++; 1584 SSL_set_session_id_context(conn->ssl, 1585 (const unsigned char *) &counter, 1586 sizeof(counter)); 1587 1588 return 0; 1589 } 1590 1591 1592 static int tls_connection_client_cert(struct tls_connection *conn, 1593 const char *client_cert, 1594 const u8 *client_cert_blob, 1595 size_t client_cert_blob_len) 1596 { 1597 if (client_cert == NULL && client_cert_blob == NULL) 1598 return 0; 1599 1600 if (client_cert_blob && 1601 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob, 1602 client_cert_blob_len) == 1) { 1603 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> " 1604 "OK"); 1605 return 0; 1606 } else if (client_cert_blob) { 1607 tls_show_errors(MSG_DEBUG, __func__, 1608 "SSL_use_certificate_ASN1 failed"); 1609 } 1610 1611 if (client_cert == NULL) 1612 return -1; 1613 1614 #ifdef ANDROID 1615 if (os_strncmp("keystore://", client_cert, 11) == 0) { 1616 BIO *bio = BIO_from_keystore(&client_cert[11]); 1617 X509 *x509 = NULL; 1618 int ret = -1; 1619 if (bio) { 1620 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); 1621 BIO_free(bio); 1622 } 1623 if (x509) { 1624 if (SSL_use_certificate(conn->ssl, x509) == 1) 1625 ret = 0; 1626 X509_free(x509); 1627 } 1628 return ret; 1629 } 1630 #endif /* ANDROID */ 1631 1632 #ifndef OPENSSL_NO_STDIO 1633 if (SSL_use_certificate_file(conn->ssl, client_cert, 1634 SSL_FILETYPE_ASN1) == 1) { 1635 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)" 1636 " --> OK"); 1637 return 0; 1638 } 1639 1640 if (SSL_use_certificate_file(conn->ssl, client_cert, 1641 SSL_FILETYPE_PEM) == 1) { 1642 ERR_clear_error(); 1643 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)" 1644 " --> OK"); 1645 return 0; 1646 } 1647 1648 tls_show_errors(MSG_DEBUG, __func__, 1649 "SSL_use_certificate_file failed"); 1650 #else /* OPENSSL_NO_STDIO */ 1651 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 1652 #endif /* OPENSSL_NO_STDIO */ 1653 1654 return -1; 1655 } 1656 1657 1658 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert) 1659 { 1660 #ifndef OPENSSL_NO_STDIO 1661 if (client_cert == NULL) 1662 return 0; 1663 1664 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 1665 SSL_FILETYPE_ASN1) != 1 && 1666 SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 1667 SSL_FILETYPE_PEM) != 1) { 1668 tls_show_errors(MSG_INFO, __func__, 1669 "Failed to load client certificate"); 1670 return -1; 1671 } 1672 return 0; 1673 #else /* OPENSSL_NO_STDIO */ 1674 if (client_cert == NULL) 1675 return 0; 1676 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 1677 return -1; 1678 #endif /* OPENSSL_NO_STDIO */ 1679 } 1680 1681 1682 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password) 1683 { 1684 if (password == NULL) { 1685 return 0; 1686 } 1687 os_strlcpy(buf, (char *) password, size); 1688 return os_strlen(buf); 1689 } 1690 1691 1692 #ifdef PKCS12_FUNCS 1693 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12, 1694 const char *passwd) 1695 { 1696 EVP_PKEY *pkey; 1697 X509 *cert; 1698 STACK_OF(X509) *certs; 1699 int res = 0; 1700 char buf[256]; 1701 1702 pkey = NULL; 1703 cert = NULL; 1704 certs = NULL; 1705 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) { 1706 tls_show_errors(MSG_DEBUG, __func__, 1707 "Failed to parse PKCS12 file"); 1708 PKCS12_free(p12); 1709 return -1; 1710 } 1711 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data"); 1712 1713 if (cert) { 1714 X509_NAME_oneline(X509_get_subject_name(cert), buf, 1715 sizeof(buf)); 1716 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: " 1717 "subject='%s'", buf); 1718 if (ssl) { 1719 if (SSL_use_certificate(ssl, cert) != 1) 1720 res = -1; 1721 } else { 1722 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1) 1723 res = -1; 1724 } 1725 X509_free(cert); 1726 } 1727 1728 if (pkey) { 1729 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12"); 1730 if (ssl) { 1731 if (SSL_use_PrivateKey(ssl, pkey) != 1) 1732 res = -1; 1733 } else { 1734 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1) 1735 res = -1; 1736 } 1737 EVP_PKEY_free(pkey); 1738 } 1739 1740 if (certs) { 1741 while ((cert = sk_X509_pop(certs)) != NULL) { 1742 X509_NAME_oneline(X509_get_subject_name(cert), buf, 1743 sizeof(buf)); 1744 wpa_printf(MSG_DEBUG, "TLS: additional certificate" 1745 " from PKCS12: subject='%s'", buf); 1746 /* 1747 * There is no SSL equivalent for the chain cert - so 1748 * always add it to the context... 1749 */ 1750 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) { 1751 res = -1; 1752 break; 1753 } 1754 } 1755 sk_X509_free(certs); 1756 } 1757 1758 PKCS12_free(p12); 1759 1760 if (res < 0) 1761 tls_get_errors(ssl_ctx); 1762 1763 return res; 1764 } 1765 #endif /* PKCS12_FUNCS */ 1766 1767 1768 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key, 1769 const char *passwd) 1770 { 1771 #ifdef PKCS12_FUNCS 1772 FILE *f; 1773 PKCS12 *p12; 1774 1775 f = fopen(private_key, "rb"); 1776 if (f == NULL) 1777 return -1; 1778 1779 p12 = d2i_PKCS12_fp(f, NULL); 1780 fclose(f); 1781 1782 if (p12 == NULL) { 1783 tls_show_errors(MSG_INFO, __func__, 1784 "Failed to use PKCS#12 file"); 1785 return -1; 1786 } 1787 1788 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); 1789 1790 #else /* PKCS12_FUNCS */ 1791 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read " 1792 "p12/pfx files"); 1793 return -1; 1794 #endif /* PKCS12_FUNCS */ 1795 } 1796 1797 1798 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl, 1799 const u8 *blob, size_t len, const char *passwd) 1800 { 1801 #ifdef PKCS12_FUNCS 1802 PKCS12 *p12; 1803 1804 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len); 1805 if (p12 == NULL) { 1806 tls_show_errors(MSG_INFO, __func__, 1807 "Failed to use PKCS#12 blob"); 1808 return -1; 1809 } 1810 1811 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); 1812 1813 #else /* PKCS12_FUNCS */ 1814 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse " 1815 "p12/pfx blobs"); 1816 return -1; 1817 #endif /* PKCS12_FUNCS */ 1818 } 1819 1820 1821 #ifndef OPENSSL_NO_ENGINE 1822 static int tls_engine_get_cert(struct tls_connection *conn, 1823 const char *cert_id, 1824 X509 **cert) 1825 { 1826 /* this runs after the private key is loaded so no PIN is required */ 1827 struct { 1828 const char *cert_id; 1829 X509 *cert; 1830 } params; 1831 params.cert_id = cert_id; 1832 params.cert = NULL; 1833 1834 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL", 1835 0, ¶ms, NULL, 1)) { 1836 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id" 1837 " '%s' [%s]", cert_id, 1838 ERR_error_string(ERR_get_error(), NULL)); 1839 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1840 } 1841 if (!params.cert) { 1842 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id" 1843 " '%s'", cert_id); 1844 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1845 } 1846 *cert = params.cert; 1847 return 0; 1848 } 1849 #endif /* OPENSSL_NO_ENGINE */ 1850 1851 1852 static int tls_connection_engine_client_cert(struct tls_connection *conn, 1853 const char *cert_id) 1854 { 1855 #ifndef OPENSSL_NO_ENGINE 1856 X509 *cert; 1857 1858 if (tls_engine_get_cert(conn, cert_id, &cert)) 1859 return -1; 1860 1861 if (!SSL_use_certificate(conn->ssl, cert)) { 1862 tls_show_errors(MSG_ERROR, __func__, 1863 "SSL_use_certificate failed"); 1864 X509_free(cert); 1865 return -1; 1866 } 1867 X509_free(cert); 1868 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> " 1869 "OK"); 1870 return 0; 1871 1872 #else /* OPENSSL_NO_ENGINE */ 1873 return -1; 1874 #endif /* OPENSSL_NO_ENGINE */ 1875 } 1876 1877 1878 static int tls_connection_engine_ca_cert(void *_ssl_ctx, 1879 struct tls_connection *conn, 1880 const char *ca_cert_id) 1881 { 1882 #ifndef OPENSSL_NO_ENGINE 1883 X509 *cert; 1884 SSL_CTX *ssl_ctx = _ssl_ctx; 1885 1886 if (tls_engine_get_cert(conn, ca_cert_id, &cert)) 1887 return -1; 1888 1889 /* start off the same as tls_connection_ca_cert */ 1890 X509_STORE_free(ssl_ctx->cert_store); 1891 ssl_ctx->cert_store = X509_STORE_new(); 1892 if (ssl_ctx->cert_store == NULL) { 1893 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 1894 "certificate store", __func__); 1895 X509_free(cert); 1896 return -1; 1897 } 1898 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 1899 unsigned long err = ERR_peek_error(); 1900 tls_show_errors(MSG_WARNING, __func__, 1901 "Failed to add CA certificate from engine " 1902 "to certificate store"); 1903 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1904 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1905 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert" 1906 " already in hash table error", 1907 __func__); 1908 } else { 1909 X509_free(cert); 1910 return -1; 1911 } 1912 } 1913 X509_free(cert); 1914 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine " 1915 "to certificate store", __func__); 1916 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1917 return 0; 1918 1919 #else /* OPENSSL_NO_ENGINE */ 1920 return -1; 1921 #endif /* OPENSSL_NO_ENGINE */ 1922 } 1923 1924 1925 static int tls_connection_engine_private_key(struct tls_connection *conn) 1926 { 1927 #ifndef OPENSSL_NO_ENGINE 1928 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) { 1929 tls_show_errors(MSG_ERROR, __func__, 1930 "ENGINE: cannot use private key for TLS"); 1931 return -1; 1932 } 1933 if (!SSL_check_private_key(conn->ssl)) { 1934 tls_show_errors(MSG_INFO, __func__, 1935 "Private key failed verification"); 1936 return -1; 1937 } 1938 return 0; 1939 #else /* OPENSSL_NO_ENGINE */ 1940 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but " 1941 "engine support was not compiled in"); 1942 return -1; 1943 #endif /* OPENSSL_NO_ENGINE */ 1944 } 1945 1946 1947 static int tls_connection_private_key(void *_ssl_ctx, 1948 struct tls_connection *conn, 1949 const char *private_key, 1950 const char *private_key_passwd, 1951 const u8 *private_key_blob, 1952 size_t private_key_blob_len) 1953 { 1954 SSL_CTX *ssl_ctx = _ssl_ctx; 1955 char *passwd; 1956 int ok; 1957 1958 if (private_key == NULL && private_key_blob == NULL) 1959 return 0; 1960 1961 if (private_key_passwd) { 1962 passwd = os_strdup(private_key_passwd); 1963 if (passwd == NULL) 1964 return -1; 1965 } else 1966 passwd = NULL; 1967 1968 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 1969 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 1970 1971 ok = 0; 1972 while (private_key_blob) { 1973 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl, 1974 (u8 *) private_key_blob, 1975 private_key_blob_len) == 1) { 1976 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 1977 "ASN1(EVP_PKEY_RSA) --> OK"); 1978 ok = 1; 1979 break; 1980 } 1981 1982 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl, 1983 (u8 *) private_key_blob, 1984 private_key_blob_len) == 1) { 1985 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 1986 "ASN1(EVP_PKEY_DSA) --> OK"); 1987 ok = 1; 1988 break; 1989 } 1990 1991 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl, 1992 (u8 *) private_key_blob, 1993 private_key_blob_len) == 1) { 1994 wpa_printf(MSG_DEBUG, "OpenSSL: " 1995 "SSL_use_RSAPrivateKey_ASN1 --> OK"); 1996 ok = 1; 1997 break; 1998 } 1999 2000 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob, 2001 private_key_blob_len, passwd) == 0) { 2002 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> " 2003 "OK"); 2004 ok = 1; 2005 break; 2006 } 2007 2008 break; 2009 } 2010 2011 #ifdef ANDROID 2012 if (!ok && private_key && 2013 os_strncmp("keystore://", private_key, 11) == 0) { 2014 BIO *bio = BIO_from_keystore(&private_key[11]); 2015 EVP_PKEY *pkey = NULL; 2016 if (bio) { 2017 pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL); 2018 BIO_free(bio); 2019 } 2020 if (pkey) { 2021 if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) { 2022 wpa_printf(MSG_DEBUG, "OpenSSL: Private key " 2023 "from keystore"); 2024 ok = 1; 2025 } 2026 EVP_PKEY_free(pkey); 2027 } 2028 } 2029 #endif /* ANDROID */ 2030 2031 while (!ok && private_key) { 2032 #ifndef OPENSSL_NO_STDIO 2033 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2034 SSL_FILETYPE_ASN1) == 1) { 2035 wpa_printf(MSG_DEBUG, "OpenSSL: " 2036 "SSL_use_PrivateKey_File (DER) --> OK"); 2037 ok = 1; 2038 break; 2039 } 2040 2041 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2042 SSL_FILETYPE_PEM) == 1) { 2043 wpa_printf(MSG_DEBUG, "OpenSSL: " 2044 "SSL_use_PrivateKey_File (PEM) --> OK"); 2045 ok = 1; 2046 break; 2047 } 2048 #else /* OPENSSL_NO_STDIO */ 2049 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 2050 __func__); 2051 #endif /* OPENSSL_NO_STDIO */ 2052 2053 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd) 2054 == 0) { 2055 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file " 2056 "--> OK"); 2057 ok = 1; 2058 break; 2059 } 2060 2061 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) { 2062 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to " 2063 "access certificate store --> OK"); 2064 ok = 1; 2065 break; 2066 } 2067 2068 break; 2069 } 2070 2071 if (!ok) { 2072 tls_show_errors(MSG_INFO, __func__, 2073 "Failed to load private key"); 2074 os_free(passwd); 2075 return -1; 2076 } 2077 ERR_clear_error(); 2078 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2079 os_free(passwd); 2080 2081 if (!SSL_check_private_key(conn->ssl)) { 2082 tls_show_errors(MSG_INFO, __func__, "Private key failed " 2083 "verification"); 2084 return -1; 2085 } 2086 2087 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully"); 2088 return 0; 2089 } 2090 2091 2092 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key, 2093 const char *private_key_passwd) 2094 { 2095 char *passwd; 2096 2097 if (private_key == NULL) 2098 return 0; 2099 2100 if (private_key_passwd) { 2101 passwd = os_strdup(private_key_passwd); 2102 if (passwd == NULL) 2103 return -1; 2104 } else 2105 passwd = NULL; 2106 2107 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 2108 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 2109 if ( 2110 #ifndef OPENSSL_NO_STDIO 2111 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2112 SSL_FILETYPE_ASN1) != 1 && 2113 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2114 SSL_FILETYPE_PEM) != 1 && 2115 #endif /* OPENSSL_NO_STDIO */ 2116 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) { 2117 tls_show_errors(MSG_INFO, __func__, 2118 "Failed to load private key"); 2119 os_free(passwd); 2120 ERR_clear_error(); 2121 return -1; 2122 } 2123 os_free(passwd); 2124 ERR_clear_error(); 2125 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2126 2127 if (!SSL_CTX_check_private_key(ssl_ctx)) { 2128 tls_show_errors(MSG_INFO, __func__, 2129 "Private key failed verification"); 2130 return -1; 2131 } 2132 2133 return 0; 2134 } 2135 2136 2137 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file) 2138 { 2139 #ifdef OPENSSL_NO_DH 2140 if (dh_file == NULL) 2141 return 0; 2142 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2143 "dh_file specified"); 2144 return -1; 2145 #else /* OPENSSL_NO_DH */ 2146 DH *dh; 2147 BIO *bio; 2148 2149 /* TODO: add support for dh_blob */ 2150 if (dh_file == NULL) 2151 return 0; 2152 if (conn == NULL) 2153 return -1; 2154 2155 bio = BIO_new_file(dh_file, "r"); 2156 if (bio == NULL) { 2157 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2158 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2159 return -1; 2160 } 2161 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2162 BIO_free(bio); 2163 #ifndef OPENSSL_NO_DSA 2164 while (dh == NULL) { 2165 DSA *dsa; 2166 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2167 " trying to parse as DSA params", dh_file, 2168 ERR_error_string(ERR_get_error(), NULL)); 2169 bio = BIO_new_file(dh_file, "r"); 2170 if (bio == NULL) 2171 break; 2172 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2173 BIO_free(bio); 2174 if (!dsa) { 2175 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2176 "'%s': %s", dh_file, 2177 ERR_error_string(ERR_get_error(), NULL)); 2178 break; 2179 } 2180 2181 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2182 dh = DSA_dup_DH(dsa); 2183 DSA_free(dsa); 2184 if (dh == NULL) { 2185 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2186 "params into DH params"); 2187 break; 2188 } 2189 break; 2190 } 2191 #endif /* !OPENSSL_NO_DSA */ 2192 if (dh == NULL) { 2193 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2194 "'%s'", dh_file); 2195 return -1; 2196 } 2197 2198 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) { 2199 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2200 "%s", dh_file, 2201 ERR_error_string(ERR_get_error(), NULL)); 2202 DH_free(dh); 2203 return -1; 2204 } 2205 DH_free(dh); 2206 return 0; 2207 #endif /* OPENSSL_NO_DH */ 2208 } 2209 2210 2211 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file) 2212 { 2213 #ifdef OPENSSL_NO_DH 2214 if (dh_file == NULL) 2215 return 0; 2216 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2217 "dh_file specified"); 2218 return -1; 2219 #else /* OPENSSL_NO_DH */ 2220 DH *dh; 2221 BIO *bio; 2222 2223 /* TODO: add support for dh_blob */ 2224 if (dh_file == NULL) 2225 return 0; 2226 if (ssl_ctx == NULL) 2227 return -1; 2228 2229 bio = BIO_new_file(dh_file, "r"); 2230 if (bio == NULL) { 2231 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2232 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2233 return -1; 2234 } 2235 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2236 BIO_free(bio); 2237 #ifndef OPENSSL_NO_DSA 2238 while (dh == NULL) { 2239 DSA *dsa; 2240 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2241 " trying to parse as DSA params", dh_file, 2242 ERR_error_string(ERR_get_error(), NULL)); 2243 bio = BIO_new_file(dh_file, "r"); 2244 if (bio == NULL) 2245 break; 2246 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2247 BIO_free(bio); 2248 if (!dsa) { 2249 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2250 "'%s': %s", dh_file, 2251 ERR_error_string(ERR_get_error(), NULL)); 2252 break; 2253 } 2254 2255 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2256 dh = DSA_dup_DH(dsa); 2257 DSA_free(dsa); 2258 if (dh == NULL) { 2259 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2260 "params into DH params"); 2261 break; 2262 } 2263 break; 2264 } 2265 #endif /* !OPENSSL_NO_DSA */ 2266 if (dh == NULL) { 2267 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2268 "'%s'", dh_file); 2269 return -1; 2270 } 2271 2272 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) { 2273 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2274 "%s", dh_file, 2275 ERR_error_string(ERR_get_error(), NULL)); 2276 DH_free(dh); 2277 return -1; 2278 } 2279 DH_free(dh); 2280 return 0; 2281 #endif /* OPENSSL_NO_DH */ 2282 } 2283 2284 2285 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn, 2286 struct tls_keys *keys) 2287 { 2288 SSL *ssl; 2289 2290 if (conn == NULL || keys == NULL) 2291 return -1; 2292 ssl = conn->ssl; 2293 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL) 2294 return -1; 2295 2296 os_memset(keys, 0, sizeof(*keys)); 2297 keys->master_key = ssl->session->master_key; 2298 keys->master_key_len = ssl->session->master_key_length; 2299 keys->client_random = ssl->s3->client_random; 2300 keys->client_random_len = SSL3_RANDOM_SIZE; 2301 keys->server_random = ssl->s3->server_random; 2302 keys->server_random_len = SSL3_RANDOM_SIZE; 2303 2304 return 0; 2305 } 2306 2307 2308 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn, 2309 const char *label, int server_random_first, 2310 u8 *out, size_t out_len) 2311 { 2312 return -1; 2313 } 2314 2315 2316 static struct wpabuf * 2317 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data, 2318 int server) 2319 { 2320 int res; 2321 struct wpabuf *out_data; 2322 2323 /* 2324 * Give TLS handshake data from the server (if available) to OpenSSL 2325 * for processing. 2326 */ 2327 if (in_data && 2328 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data)) 2329 < 0) { 2330 tls_show_errors(MSG_INFO, __func__, 2331 "Handshake failed - BIO_write"); 2332 return NULL; 2333 } 2334 2335 /* Initiate TLS handshake or continue the existing handshake */ 2336 if (server) 2337 res = SSL_accept(conn->ssl); 2338 else 2339 res = SSL_connect(conn->ssl); 2340 if (res != 1) { 2341 int err = SSL_get_error(conn->ssl, res); 2342 if (err == SSL_ERROR_WANT_READ) 2343 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want " 2344 "more data"); 2345 else if (err == SSL_ERROR_WANT_WRITE) 2346 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to " 2347 "write"); 2348 else { 2349 tls_show_errors(MSG_INFO, __func__, "SSL_connect"); 2350 conn->failed++; 2351 } 2352 } 2353 2354 /* Get the TLS handshake data to be sent to the server */ 2355 res = BIO_ctrl_pending(conn->ssl_out); 2356 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res); 2357 out_data = wpabuf_alloc(res); 2358 if (out_data == NULL) { 2359 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for " 2360 "handshake output (%d bytes)", res); 2361 if (BIO_reset(conn->ssl_out) < 0) { 2362 tls_show_errors(MSG_INFO, __func__, 2363 "BIO_reset failed"); 2364 } 2365 return NULL; 2366 } 2367 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data), 2368 res); 2369 if (res < 0) { 2370 tls_show_errors(MSG_INFO, __func__, 2371 "Handshake failed - BIO_read"); 2372 if (BIO_reset(conn->ssl_out) < 0) { 2373 tls_show_errors(MSG_INFO, __func__, 2374 "BIO_reset failed"); 2375 } 2376 wpabuf_free(out_data); 2377 return NULL; 2378 } 2379 wpabuf_put(out_data, res); 2380 2381 return out_data; 2382 } 2383 2384 2385 static struct wpabuf * 2386 openssl_get_appl_data(struct tls_connection *conn, size_t max_len) 2387 { 2388 struct wpabuf *appl_data; 2389 int res; 2390 2391 appl_data = wpabuf_alloc(max_len + 100); 2392 if (appl_data == NULL) 2393 return NULL; 2394 2395 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data), 2396 wpabuf_size(appl_data)); 2397 if (res < 0) { 2398 int err = SSL_get_error(conn->ssl, res); 2399 if (err == SSL_ERROR_WANT_READ || 2400 err == SSL_ERROR_WANT_WRITE) { 2401 wpa_printf(MSG_DEBUG, "SSL: No Application Data " 2402 "included"); 2403 } else { 2404 tls_show_errors(MSG_INFO, __func__, 2405 "Failed to read possible " 2406 "Application Data"); 2407 } 2408 wpabuf_free(appl_data); 2409 return NULL; 2410 } 2411 2412 wpabuf_put(appl_data, res); 2413 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished " 2414 "message", appl_data); 2415 2416 return appl_data; 2417 } 2418 2419 2420 static struct wpabuf * 2421 openssl_connection_handshake(struct tls_connection *conn, 2422 const struct wpabuf *in_data, 2423 struct wpabuf **appl_data, int server) 2424 { 2425 struct wpabuf *out_data; 2426 2427 if (appl_data) 2428 *appl_data = NULL; 2429 2430 out_data = openssl_handshake(conn, in_data, server); 2431 if (out_data == NULL) 2432 return NULL; 2433 2434 if (SSL_is_init_finished(conn->ssl) && appl_data && in_data) 2435 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data)); 2436 2437 return out_data; 2438 } 2439 2440 2441 struct wpabuf * 2442 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn, 2443 const struct wpabuf *in_data, 2444 struct wpabuf **appl_data) 2445 { 2446 return openssl_connection_handshake(conn, in_data, appl_data, 0); 2447 } 2448 2449 2450 struct wpabuf * tls_connection_server_handshake(void *tls_ctx, 2451 struct tls_connection *conn, 2452 const struct wpabuf *in_data, 2453 struct wpabuf **appl_data) 2454 { 2455 return openssl_connection_handshake(conn, in_data, appl_data, 1); 2456 } 2457 2458 2459 struct wpabuf * tls_connection_encrypt(void *tls_ctx, 2460 struct tls_connection *conn, 2461 const struct wpabuf *in_data) 2462 { 2463 int res; 2464 struct wpabuf *buf; 2465 2466 if (conn == NULL) 2467 return NULL; 2468 2469 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */ 2470 if ((res = BIO_reset(conn->ssl_in)) < 0 || 2471 (res = BIO_reset(conn->ssl_out)) < 0) { 2472 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 2473 return NULL; 2474 } 2475 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data)); 2476 if (res < 0) { 2477 tls_show_errors(MSG_INFO, __func__, 2478 "Encryption failed - SSL_write"); 2479 return NULL; 2480 } 2481 2482 /* Read encrypted data to be sent to the server */ 2483 buf = wpabuf_alloc(wpabuf_len(in_data) + 300); 2484 if (buf == NULL) 2485 return NULL; 2486 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf)); 2487 if (res < 0) { 2488 tls_show_errors(MSG_INFO, __func__, 2489 "Encryption failed - BIO_read"); 2490 wpabuf_free(buf); 2491 return NULL; 2492 } 2493 wpabuf_put(buf, res); 2494 2495 return buf; 2496 } 2497 2498 2499 struct wpabuf * tls_connection_decrypt(void *tls_ctx, 2500 struct tls_connection *conn, 2501 const struct wpabuf *in_data) 2502 { 2503 int res; 2504 struct wpabuf *buf; 2505 2506 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */ 2507 res = BIO_write(conn->ssl_in, wpabuf_head(in_data), 2508 wpabuf_len(in_data)); 2509 if (res < 0) { 2510 tls_show_errors(MSG_INFO, __func__, 2511 "Decryption failed - BIO_write"); 2512 return NULL; 2513 } 2514 if (BIO_reset(conn->ssl_out) < 0) { 2515 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 2516 return NULL; 2517 } 2518 2519 /* Read decrypted data for further processing */ 2520 /* 2521 * Even though we try to disable TLS compression, it is possible that 2522 * this cannot be done with all TLS libraries. Add extra buffer space 2523 * to handle the possibility of the decrypted data being longer than 2524 * input data. 2525 */ 2526 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); 2527 if (buf == NULL) 2528 return NULL; 2529 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf)); 2530 if (res < 0) { 2531 tls_show_errors(MSG_INFO, __func__, 2532 "Decryption failed - SSL_read"); 2533 wpabuf_free(buf); 2534 return NULL; 2535 } 2536 wpabuf_put(buf, res); 2537 2538 return buf; 2539 } 2540 2541 2542 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) 2543 { 2544 return conn ? conn->ssl->hit : 0; 2545 } 2546 2547 2548 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, 2549 u8 *ciphers) 2550 { 2551 char buf[100], *pos, *end; 2552 u8 *c; 2553 int ret; 2554 2555 if (conn == NULL || conn->ssl == NULL || ciphers == NULL) 2556 return -1; 2557 2558 buf[0] = '\0'; 2559 pos = buf; 2560 end = pos + sizeof(buf); 2561 2562 c = ciphers; 2563 while (*c != TLS_CIPHER_NONE) { 2564 const char *suite; 2565 2566 switch (*c) { 2567 case TLS_CIPHER_RC4_SHA: 2568 suite = "RC4-SHA"; 2569 break; 2570 case TLS_CIPHER_AES128_SHA: 2571 suite = "AES128-SHA"; 2572 break; 2573 case TLS_CIPHER_RSA_DHE_AES128_SHA: 2574 suite = "DHE-RSA-AES128-SHA"; 2575 break; 2576 case TLS_CIPHER_ANON_DH_AES128_SHA: 2577 suite = "ADH-AES128-SHA"; 2578 break; 2579 default: 2580 wpa_printf(MSG_DEBUG, "TLS: Unsupported " 2581 "cipher selection: %d", *c); 2582 return -1; 2583 } 2584 ret = os_snprintf(pos, end - pos, ":%s", suite); 2585 if (ret < 0 || ret >= end - pos) 2586 break; 2587 pos += ret; 2588 2589 c++; 2590 } 2591 2592 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1); 2593 2594 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) { 2595 tls_show_errors(MSG_INFO, __func__, 2596 "Cipher suite configuration failed"); 2597 return -1; 2598 } 2599 2600 return 0; 2601 } 2602 2603 2604 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, 2605 char *buf, size_t buflen) 2606 { 2607 const char *name; 2608 if (conn == NULL || conn->ssl == NULL) 2609 return -1; 2610 2611 name = SSL_get_cipher(conn->ssl); 2612 if (name == NULL) 2613 return -1; 2614 2615 os_strlcpy(buf, name, buflen); 2616 return 0; 2617 } 2618 2619 2620 int tls_connection_enable_workaround(void *ssl_ctx, 2621 struct tls_connection *conn) 2622 { 2623 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); 2624 2625 return 0; 2626 } 2627 2628 2629 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2630 /* ClientHello TLS extensions require a patch to openssl, so this function is 2631 * commented out unless explicitly needed for EAP-FAST in order to be able to 2632 * build this file with unmodified openssl. */ 2633 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, 2634 int ext_type, const u8 *data, 2635 size_t data_len) 2636 { 2637 if (conn == NULL || conn->ssl == NULL || ext_type != 35) 2638 return -1; 2639 2640 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2641 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data, 2642 data_len) != 1) 2643 return -1; 2644 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2645 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data, 2646 data_len) != 1) 2647 return -1; 2648 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2649 2650 return 0; 2651 } 2652 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2653 2654 2655 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) 2656 { 2657 if (conn == NULL) 2658 return -1; 2659 return conn->failed; 2660 } 2661 2662 2663 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) 2664 { 2665 if (conn == NULL) 2666 return -1; 2667 return conn->read_alerts; 2668 } 2669 2670 2671 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) 2672 { 2673 if (conn == NULL) 2674 return -1; 2675 return conn->write_alerts; 2676 } 2677 2678 2679 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 2680 const struct tls_connection_params *params) 2681 { 2682 int ret; 2683 unsigned long err; 2684 2685 if (conn == NULL) 2686 return -1; 2687 2688 while ((err = ERR_get_error())) { 2689 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 2690 __func__, ERR_error_string(err, NULL)); 2691 } 2692 2693 if (params->engine) { 2694 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine"); 2695 ret = tls_engine_init(conn, params->engine_id, params->pin, 2696 params->key_id, params->cert_id, 2697 params->ca_cert_id); 2698 if (ret) 2699 return ret; 2700 } 2701 if (tls_connection_set_subject_match(conn, 2702 params->subject_match, 2703 params->altsubject_match)) 2704 return -1; 2705 2706 if (params->engine && params->ca_cert_id) { 2707 if (tls_connection_engine_ca_cert(tls_ctx, conn, 2708 params->ca_cert_id)) 2709 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2710 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert, 2711 params->ca_cert_blob, 2712 params->ca_cert_blob_len, 2713 params->ca_path)) 2714 return -1; 2715 2716 if (params->engine && params->cert_id) { 2717 if (tls_connection_engine_client_cert(conn, params->cert_id)) 2718 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2719 } else if (tls_connection_client_cert(conn, params->client_cert, 2720 params->client_cert_blob, 2721 params->client_cert_blob_len)) 2722 return -1; 2723 2724 if (params->engine && params->key_id) { 2725 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine"); 2726 if (tls_connection_engine_private_key(conn)) 2727 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2728 } else if (tls_connection_private_key(tls_ctx, conn, 2729 params->private_key, 2730 params->private_key_passwd, 2731 params->private_key_blob, 2732 params->private_key_blob_len)) { 2733 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'", 2734 params->private_key); 2735 return -1; 2736 } 2737 2738 if (tls_connection_dh(conn, params->dh_file)) { 2739 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 2740 params->dh_file); 2741 return -1; 2742 } 2743 2744 conn->flags = params->flags; 2745 2746 tls_get_errors(tls_ctx); 2747 2748 return 0; 2749 } 2750 2751 2752 int tls_global_set_params(void *tls_ctx, 2753 const struct tls_connection_params *params) 2754 { 2755 SSL_CTX *ssl_ctx = tls_ctx; 2756 unsigned long err; 2757 2758 while ((err = ERR_get_error())) { 2759 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 2760 __func__, ERR_error_string(err, NULL)); 2761 } 2762 2763 if (tls_global_ca_cert(ssl_ctx, params->ca_cert)) 2764 return -1; 2765 2766 if (tls_global_client_cert(ssl_ctx, params->client_cert)) 2767 return -1; 2768 2769 if (tls_global_private_key(ssl_ctx, params->private_key, 2770 params->private_key_passwd)) 2771 return -1; 2772 2773 if (tls_global_dh(ssl_ctx, params->dh_file)) { 2774 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 2775 params->dh_file); 2776 return -1; 2777 } 2778 2779 return 0; 2780 } 2781 2782 2783 int tls_connection_get_keyblock_size(void *tls_ctx, 2784 struct tls_connection *conn) 2785 { 2786 const EVP_CIPHER *c; 2787 const EVP_MD *h; 2788 int md_size; 2789 2790 if (conn == NULL || conn->ssl == NULL || 2791 conn->ssl->enc_read_ctx == NULL || 2792 conn->ssl->enc_read_ctx->cipher == NULL || 2793 conn->ssl->read_hash == NULL) 2794 return -1; 2795 2796 c = conn->ssl->enc_read_ctx->cipher; 2797 #if OPENSSL_VERSION_NUMBER >= 0x00909000L 2798 h = EVP_MD_CTX_md(conn->ssl->read_hash); 2799 #else 2800 h = conn->ssl->read_hash; 2801 #endif 2802 if (h) 2803 md_size = EVP_MD_size(h); 2804 #if OPENSSL_VERSION_NUMBER >= 0x10000000L 2805 else if (conn->ssl->s3) 2806 md_size = conn->ssl->s3->tmp.new_mac_secret_size; 2807 #endif 2808 else 2809 return -1; 2810 2811 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d " 2812 "IV_len=%d", EVP_CIPHER_key_length(c), md_size, 2813 EVP_CIPHER_iv_length(c)); 2814 return 2 * (EVP_CIPHER_key_length(c) + 2815 md_size + 2816 EVP_CIPHER_iv_length(c)); 2817 } 2818 2819 2820 unsigned int tls_capabilities(void *tls_ctx) 2821 { 2822 return 0; 2823 } 2824 2825 2826 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2827 /* Pre-shared secred requires a patch to openssl, so this function is 2828 * commented out unless explicitly needed for EAP-FAST in order to be able to 2829 * build this file with unmodified openssl. */ 2830 2831 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, 2832 STACK_OF(SSL_CIPHER) *peer_ciphers, 2833 SSL_CIPHER **cipher, void *arg) 2834 { 2835 struct tls_connection *conn = arg; 2836 int ret; 2837 2838 if (conn == NULL || conn->session_ticket_cb == NULL) 2839 return 0; 2840 2841 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, 2842 conn->session_ticket, 2843 conn->session_ticket_len, 2844 s->s3->client_random, 2845 s->s3->server_random, secret); 2846 os_free(conn->session_ticket); 2847 conn->session_ticket = NULL; 2848 2849 if (ret <= 0) 2850 return 0; 2851 2852 *secret_len = SSL_MAX_MASTER_KEY_LENGTH; 2853 return 1; 2854 } 2855 2856 2857 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2858 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data, 2859 int len, void *arg) 2860 { 2861 struct tls_connection *conn = arg; 2862 2863 if (conn == NULL || conn->session_ticket_cb == NULL) 2864 return 0; 2865 2866 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len); 2867 2868 os_free(conn->session_ticket); 2869 conn->session_ticket = NULL; 2870 2871 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2872 "extension", data, len); 2873 2874 conn->session_ticket = os_malloc(len); 2875 if (conn->session_ticket == NULL) 2876 return 0; 2877 2878 os_memcpy(conn->session_ticket, data, len); 2879 conn->session_ticket_len = len; 2880 2881 return 1; 2882 } 2883 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2884 #ifdef SSL_OP_NO_TICKET 2885 static void tls_hello_ext_cb(SSL *s, int client_server, int type, 2886 unsigned char *data, int len, void *arg) 2887 { 2888 struct tls_connection *conn = arg; 2889 2890 if (conn == NULL || conn->session_ticket_cb == NULL) 2891 return; 2892 2893 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, 2894 type, len); 2895 2896 if (type == TLSEXT_TYPE_session_ticket && !client_server) { 2897 os_free(conn->session_ticket); 2898 conn->session_ticket = NULL; 2899 2900 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2901 "extension", data, len); 2902 conn->session_ticket = os_malloc(len); 2903 if (conn->session_ticket == NULL) 2904 return; 2905 2906 os_memcpy(conn->session_ticket, data, len); 2907 conn->session_ticket_len = len; 2908 } 2909 } 2910 #else /* SSL_OP_NO_TICKET */ 2911 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg) 2912 { 2913 struct tls_connection *conn = arg; 2914 2915 if (conn == NULL || conn->session_ticket_cb == NULL) 2916 return 0; 2917 2918 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, 2919 ext->type, ext->length); 2920 2921 os_free(conn->session_ticket); 2922 conn->session_ticket = NULL; 2923 2924 if (ext->type == 35) { 2925 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2926 "extension", ext->data, ext->length); 2927 conn->session_ticket = os_malloc(ext->length); 2928 if (conn->session_ticket == NULL) 2929 return SSL_AD_INTERNAL_ERROR; 2930 2931 os_memcpy(conn->session_ticket, ext->data, ext->length); 2932 conn->session_ticket_len = ext->length; 2933 } 2934 2935 return 0; 2936 } 2937 #endif /* SSL_OP_NO_TICKET */ 2938 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2939 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2940 2941 2942 int tls_connection_set_session_ticket_cb(void *tls_ctx, 2943 struct tls_connection *conn, 2944 tls_session_ticket_cb cb, 2945 void *ctx) 2946 { 2947 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2948 conn->session_ticket_cb = cb; 2949 conn->session_ticket_cb_ctx = ctx; 2950 2951 if (cb) { 2952 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb, 2953 conn) != 1) 2954 return -1; 2955 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2956 SSL_set_session_ticket_ext_cb(conn->ssl, 2957 tls_session_ticket_ext_cb, conn); 2958 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2959 #ifdef SSL_OP_NO_TICKET 2960 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb); 2961 SSL_set_tlsext_debug_arg(conn->ssl, conn); 2962 #else /* SSL_OP_NO_TICKET */ 2963 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb, 2964 conn) != 1) 2965 return -1; 2966 #endif /* SSL_OP_NO_TICKET */ 2967 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2968 } else { 2969 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1) 2970 return -1; 2971 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2972 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL); 2973 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2974 #ifdef SSL_OP_NO_TICKET 2975 SSL_set_tlsext_debug_callback(conn->ssl, NULL); 2976 SSL_set_tlsext_debug_arg(conn->ssl, conn); 2977 #else /* SSL_OP_NO_TICKET */ 2978 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1) 2979 return -1; 2980 #endif /* SSL_OP_NO_TICKET */ 2981 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2982 } 2983 2984 return 0; 2985 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2986 return -1; 2987 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2988 } 2989