1 /* 2 * SSL/TLS interface functions for OpenSSL 3 * Copyright (c) 2004-2011, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #ifndef CONFIG_SMARTCARD 12 #ifndef OPENSSL_NO_ENGINE 13 #ifndef ANDROID 14 #define OPENSSL_NO_ENGINE 15 #endif 16 #endif 17 #endif 18 19 #include <openssl/ssl.h> 20 #include <openssl/err.h> 21 #include <openssl/pkcs12.h> 22 #include <openssl/x509v3.h> 23 #ifndef OPENSSL_NO_ENGINE 24 #include <openssl/engine.h> 25 #endif /* OPENSSL_NO_ENGINE */ 26 27 #ifdef ANDROID 28 #include <openssl/pem.h> 29 #include "keystore_get.h" 30 #endif /* ANDROID */ 31 32 #include "common.h" 33 #include "crypto.h" 34 #include "tls.h" 35 36 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL 37 #define OPENSSL_d2i_TYPE const unsigned char ** 38 #else 39 #define OPENSSL_d2i_TYPE unsigned char ** 40 #endif 41 42 #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT 43 #ifdef SSL_OP_NO_TICKET 44 /* 45 * Session ticket override patch was merged into OpenSSL 0.9.9 tree on 46 * 2008-11-15. This version uses a bit different API compared to the old patch. 47 */ 48 #define CONFIG_OPENSSL_TICKET_OVERRIDE 49 #endif 50 #endif 51 52 static int tls_openssl_ref_count = 0; 53 54 struct tls_global { 55 void (*event_cb)(void *ctx, enum tls_event ev, 56 union tls_event_data *data); 57 void *cb_ctx; 58 int cert_in_cb; 59 }; 60 61 static struct tls_global *tls_global = NULL; 62 63 64 struct tls_connection { 65 SSL *ssl; 66 BIO *ssl_in, *ssl_out; 67 #ifndef OPENSSL_NO_ENGINE 68 ENGINE *engine; /* functional reference to the engine */ 69 EVP_PKEY *private_key; /* the private key if using engine */ 70 #endif /* OPENSSL_NO_ENGINE */ 71 char *subject_match, *altsubject_match; 72 int read_alerts, write_alerts, failed; 73 74 tls_session_ticket_cb session_ticket_cb; 75 void *session_ticket_cb_ctx; 76 77 /* SessionTicket received from OpenSSL hello_extension_cb (server) */ 78 u8 *session_ticket; 79 size_t session_ticket_len; 80 81 unsigned int ca_cert_verify:1; 82 unsigned int cert_probe:1; 83 unsigned int server_cert_only:1; 84 85 u8 srv_cert_hash[32]; 86 87 unsigned int flags; 88 }; 89 90 91 #ifdef CONFIG_NO_STDOUT_DEBUG 92 93 static void _tls_show_errors(void) 94 { 95 unsigned long err; 96 97 while ((err = ERR_get_error())) { 98 /* Just ignore the errors, since stdout is disabled */ 99 } 100 } 101 #define tls_show_errors(l, f, t) _tls_show_errors() 102 103 #else /* CONFIG_NO_STDOUT_DEBUG */ 104 105 static void tls_show_errors(int level, const char *func, const char *txt) 106 { 107 unsigned long err; 108 109 wpa_printf(level, "OpenSSL: %s - %s %s", 110 func, txt, ERR_error_string(ERR_get_error(), NULL)); 111 112 while ((err = ERR_get_error())) { 113 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s", 114 ERR_error_string(err, NULL)); 115 } 116 } 117 118 #endif /* CONFIG_NO_STDOUT_DEBUG */ 119 120 121 #ifdef CONFIG_NATIVE_WINDOWS 122 123 /* Windows CryptoAPI and access to certificate stores */ 124 #include <wincrypt.h> 125 126 #ifdef __MINGW32_VERSION 127 /* 128 * MinGW does not yet include all the needed definitions for CryptoAPI, so 129 * define here whatever extra is needed. 130 */ 131 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16) 132 #define CERT_STORE_READONLY_FLAG 0x00008000 133 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000 134 135 #endif /* __MINGW32_VERSION */ 136 137 138 struct cryptoapi_rsa_data { 139 const CERT_CONTEXT *cert; 140 HCRYPTPROV crypt_prov; 141 DWORD key_spec; 142 BOOL free_crypt_prov; 143 }; 144 145 146 static void cryptoapi_error(const char *msg) 147 { 148 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u", 149 msg, (unsigned int) GetLastError()); 150 } 151 152 153 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from, 154 unsigned char *to, RSA *rsa, int padding) 155 { 156 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 157 return 0; 158 } 159 160 161 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from, 162 unsigned char *to, RSA *rsa, int padding) 163 { 164 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 165 return 0; 166 } 167 168 169 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from, 170 unsigned char *to, RSA *rsa, int padding) 171 { 172 struct cryptoapi_rsa_data *priv = 173 (struct cryptoapi_rsa_data *) rsa->meth->app_data; 174 HCRYPTHASH hash; 175 DWORD hash_size, len, i; 176 unsigned char *buf = NULL; 177 int ret = 0; 178 179 if (priv == NULL) { 180 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 181 ERR_R_PASSED_NULL_PARAMETER); 182 return 0; 183 } 184 185 if (padding != RSA_PKCS1_PADDING) { 186 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 187 RSA_R_UNKNOWN_PADDING_TYPE); 188 return 0; 189 } 190 191 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) { 192 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported", 193 __func__); 194 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 195 RSA_R_INVALID_MESSAGE_LENGTH); 196 return 0; 197 } 198 199 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash)) 200 { 201 cryptoapi_error("CryptCreateHash failed"); 202 return 0; 203 } 204 205 len = sizeof(hash_size); 206 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len, 207 0)) { 208 cryptoapi_error("CryptGetHashParam failed"); 209 goto err; 210 } 211 212 if ((int) hash_size != flen) { 213 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)", 214 (unsigned) hash_size, flen); 215 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 216 RSA_R_INVALID_MESSAGE_LENGTH); 217 goto err; 218 } 219 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) { 220 cryptoapi_error("CryptSetHashParam failed"); 221 goto err; 222 } 223 224 len = RSA_size(rsa); 225 buf = os_malloc(len); 226 if (buf == NULL) { 227 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE); 228 goto err; 229 } 230 231 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) { 232 cryptoapi_error("CryptSignHash failed"); 233 goto err; 234 } 235 236 for (i = 0; i < len; i++) 237 to[i] = buf[len - i - 1]; 238 ret = len; 239 240 err: 241 os_free(buf); 242 CryptDestroyHash(hash); 243 244 return ret; 245 } 246 247 248 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from, 249 unsigned char *to, RSA *rsa, int padding) 250 { 251 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 252 return 0; 253 } 254 255 256 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv) 257 { 258 if (priv == NULL) 259 return; 260 if (priv->crypt_prov && priv->free_crypt_prov) 261 CryptReleaseContext(priv->crypt_prov, 0); 262 if (priv->cert) 263 CertFreeCertificateContext(priv->cert); 264 os_free(priv); 265 } 266 267 268 static int cryptoapi_finish(RSA *rsa) 269 { 270 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data); 271 os_free((void *) rsa->meth); 272 rsa->meth = NULL; 273 return 1; 274 } 275 276 277 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store) 278 { 279 HCERTSTORE cs; 280 const CERT_CONTEXT *ret = NULL; 281 282 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0, 283 store | CERT_STORE_OPEN_EXISTING_FLAG | 284 CERT_STORE_READONLY_FLAG, L"MY"); 285 if (cs == NULL) { 286 cryptoapi_error("Failed to open 'My system store'"); 287 return NULL; 288 } 289 290 if (strncmp(name, "cert://", 7) == 0) { 291 unsigned short wbuf[255]; 292 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255); 293 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING | 294 PKCS_7_ASN_ENCODING, 295 0, CERT_FIND_SUBJECT_STR, 296 wbuf, NULL); 297 } else if (strncmp(name, "hash://", 7) == 0) { 298 CRYPT_HASH_BLOB blob; 299 int len; 300 const char *hash = name + 7; 301 unsigned char *buf; 302 303 len = os_strlen(hash) / 2; 304 buf = os_malloc(len); 305 if (buf && hexstr2bin(hash, buf, len) == 0) { 306 blob.cbData = len; 307 blob.pbData = buf; 308 ret = CertFindCertificateInStore(cs, 309 X509_ASN_ENCODING | 310 PKCS_7_ASN_ENCODING, 311 0, CERT_FIND_HASH, 312 &blob, NULL); 313 } 314 os_free(buf); 315 } 316 317 CertCloseStore(cs, 0); 318 319 return ret; 320 } 321 322 323 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 324 { 325 X509 *cert = NULL; 326 RSA *rsa = NULL, *pub_rsa; 327 struct cryptoapi_rsa_data *priv; 328 RSA_METHOD *rsa_meth; 329 330 if (name == NULL || 331 (strncmp(name, "cert://", 7) != 0 && 332 strncmp(name, "hash://", 7) != 0)) 333 return -1; 334 335 priv = os_zalloc(sizeof(*priv)); 336 rsa_meth = os_zalloc(sizeof(*rsa_meth)); 337 if (priv == NULL || rsa_meth == NULL) { 338 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory " 339 "for CryptoAPI RSA method"); 340 os_free(priv); 341 os_free(rsa_meth); 342 return -1; 343 } 344 345 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER); 346 if (priv->cert == NULL) { 347 priv->cert = cryptoapi_find_cert( 348 name, CERT_SYSTEM_STORE_LOCAL_MACHINE); 349 } 350 if (priv->cert == NULL) { 351 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate " 352 "'%s'", name); 353 goto err; 354 } 355 356 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded, 357 priv->cert->cbCertEncoded); 358 if (cert == NULL) { 359 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER " 360 "encoding"); 361 goto err; 362 } 363 364 if (!CryptAcquireCertificatePrivateKey(priv->cert, 365 CRYPT_ACQUIRE_COMPARE_KEY_FLAG, 366 NULL, &priv->crypt_prov, 367 &priv->key_spec, 368 &priv->free_crypt_prov)) { 369 cryptoapi_error("Failed to acquire a private key for the " 370 "certificate"); 371 goto err; 372 } 373 374 rsa_meth->name = "Microsoft CryptoAPI RSA Method"; 375 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc; 376 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec; 377 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc; 378 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec; 379 rsa_meth->finish = cryptoapi_finish; 380 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK; 381 rsa_meth->app_data = (char *) priv; 382 383 rsa = RSA_new(); 384 if (rsa == NULL) { 385 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, 386 ERR_R_MALLOC_FAILURE); 387 goto err; 388 } 389 390 if (!SSL_use_certificate(ssl, cert)) { 391 RSA_free(rsa); 392 rsa = NULL; 393 goto err; 394 } 395 pub_rsa = cert->cert_info->key->pkey->pkey.rsa; 396 X509_free(cert); 397 cert = NULL; 398 399 rsa->n = BN_dup(pub_rsa->n); 400 rsa->e = BN_dup(pub_rsa->e); 401 if (!RSA_set_method(rsa, rsa_meth)) 402 goto err; 403 404 if (!SSL_use_RSAPrivateKey(ssl, rsa)) 405 goto err; 406 RSA_free(rsa); 407 408 return 0; 409 410 err: 411 if (cert) 412 X509_free(cert); 413 if (rsa) 414 RSA_free(rsa); 415 else { 416 os_free(rsa_meth); 417 cryptoapi_free_data(priv); 418 } 419 return -1; 420 } 421 422 423 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name) 424 { 425 HCERTSTORE cs; 426 PCCERT_CONTEXT ctx = NULL; 427 X509 *cert; 428 char buf[128]; 429 const char *store; 430 #ifdef UNICODE 431 WCHAR *wstore; 432 #endif /* UNICODE */ 433 434 if (name == NULL || strncmp(name, "cert_store://", 13) != 0) 435 return -1; 436 437 store = name + 13; 438 #ifdef UNICODE 439 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR)); 440 if (wstore == NULL) 441 return -1; 442 wsprintf(wstore, L"%S", store); 443 cs = CertOpenSystemStore(0, wstore); 444 os_free(wstore); 445 #else /* UNICODE */ 446 cs = CertOpenSystemStore(0, store); 447 #endif /* UNICODE */ 448 if (cs == NULL) { 449 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store " 450 "'%s': error=%d", __func__, store, 451 (int) GetLastError()); 452 return -1; 453 } 454 455 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) { 456 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded, 457 ctx->cbCertEncoded); 458 if (cert == NULL) { 459 wpa_printf(MSG_INFO, "CryptoAPI: Could not process " 460 "X509 DER encoding for CA cert"); 461 continue; 462 } 463 464 X509_NAME_oneline(X509_get_subject_name(cert), buf, 465 sizeof(buf)); 466 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for " 467 "system certificate store: subject='%s'", buf); 468 469 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 470 tls_show_errors(MSG_WARNING, __func__, 471 "Failed to add ca_cert to OpenSSL " 472 "certificate store"); 473 } 474 475 X509_free(cert); 476 } 477 478 if (!CertCloseStore(cs, 0)) { 479 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store " 480 "'%s': error=%d", __func__, name + 13, 481 (int) GetLastError()); 482 } 483 484 return 0; 485 } 486 487 488 #else /* CONFIG_NATIVE_WINDOWS */ 489 490 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 491 { 492 return -1; 493 } 494 495 #endif /* CONFIG_NATIVE_WINDOWS */ 496 497 498 static void ssl_info_cb(const SSL *ssl, int where, int ret) 499 { 500 const char *str; 501 int w; 502 503 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret); 504 w = where & ~SSL_ST_MASK; 505 if (w & SSL_ST_CONNECT) 506 str = "SSL_connect"; 507 else if (w & SSL_ST_ACCEPT) 508 str = "SSL_accept"; 509 else 510 str = "undefined"; 511 512 if (where & SSL_CB_LOOP) { 513 wpa_printf(MSG_DEBUG, "SSL: %s:%s", 514 str, SSL_state_string_long(ssl)); 515 } else if (where & SSL_CB_ALERT) { 516 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", 517 where & SSL_CB_READ ? 518 "read (remote end reported an error)" : 519 "write (local SSL3 detected an error)", 520 SSL_alert_type_string_long(ret), 521 SSL_alert_desc_string_long(ret)); 522 if ((ret >> 8) == SSL3_AL_FATAL) { 523 struct tls_connection *conn = 524 SSL_get_app_data((SSL *) ssl); 525 if (where & SSL_CB_READ) 526 conn->read_alerts++; 527 else 528 conn->write_alerts++; 529 } 530 } else if (where & SSL_CB_EXIT && ret <= 0) { 531 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", 532 str, ret == 0 ? "failed" : "error", 533 SSL_state_string_long(ssl)); 534 } 535 } 536 537 538 #ifndef OPENSSL_NO_ENGINE 539 /** 540 * tls_engine_load_dynamic_generic - load any openssl engine 541 * @pre: an array of commands and values that load an engine initialized 542 * in the engine specific function 543 * @post: an array of commands and values that initialize an already loaded 544 * engine (or %NULL if not required) 545 * @id: the engine id of the engine to load (only required if post is not %NULL 546 * 547 * This function is a generic function that loads any openssl engine. 548 * 549 * Returns: 0 on success, -1 on failure 550 */ 551 static int tls_engine_load_dynamic_generic(const char *pre[], 552 const char *post[], const char *id) 553 { 554 ENGINE *engine; 555 const char *dynamic_id = "dynamic"; 556 557 engine = ENGINE_by_id(id); 558 if (engine) { 559 ENGINE_free(engine); 560 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already " 561 "available", id); 562 return 0; 563 } 564 ERR_clear_error(); 565 566 engine = ENGINE_by_id(dynamic_id); 567 if (engine == NULL) { 568 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 569 dynamic_id, 570 ERR_error_string(ERR_get_error(), NULL)); 571 return -1; 572 } 573 574 /* Perform the pre commands. This will load the engine. */ 575 while (pre && pre[0]) { 576 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]); 577 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) { 578 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: " 579 "%s %s [%s]", pre[0], pre[1], 580 ERR_error_string(ERR_get_error(), NULL)); 581 ENGINE_free(engine); 582 return -1; 583 } 584 pre += 2; 585 } 586 587 /* 588 * Free the reference to the "dynamic" engine. The loaded engine can 589 * now be looked up using ENGINE_by_id(). 590 */ 591 ENGINE_free(engine); 592 593 engine = ENGINE_by_id(id); 594 if (engine == NULL) { 595 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 596 id, ERR_error_string(ERR_get_error(), NULL)); 597 return -1; 598 } 599 600 while (post && post[0]) { 601 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]); 602 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) { 603 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:" 604 " %s %s [%s]", post[0], post[1], 605 ERR_error_string(ERR_get_error(), NULL)); 606 ENGINE_remove(engine); 607 ENGINE_free(engine); 608 return -1; 609 } 610 post += 2; 611 } 612 ENGINE_free(engine); 613 614 return 0; 615 } 616 617 618 /** 619 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc 620 * @pkcs11_so_path: pksc11_so_path from the configuration 621 * @pcks11_module_path: pkcs11_module_path from the configuration 622 */ 623 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path, 624 const char *pkcs11_module_path) 625 { 626 char *engine_id = "pkcs11"; 627 const char *pre_cmd[] = { 628 "SO_PATH", NULL /* pkcs11_so_path */, 629 "ID", NULL /* engine_id */, 630 "LIST_ADD", "1", 631 /* "NO_VCHECK", "1", */ 632 "LOAD", NULL, 633 NULL, NULL 634 }; 635 const char *post_cmd[] = { 636 "MODULE_PATH", NULL /* pkcs11_module_path */, 637 NULL, NULL 638 }; 639 640 if (!pkcs11_so_path || !pkcs11_module_path) 641 return 0; 642 643 pre_cmd[1] = pkcs11_so_path; 644 pre_cmd[3] = engine_id; 645 post_cmd[1] = pkcs11_module_path; 646 647 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s", 648 pkcs11_so_path); 649 650 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id); 651 } 652 653 654 /** 655 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc 656 * @opensc_so_path: opensc_so_path from the configuration 657 */ 658 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path) 659 { 660 char *engine_id = "opensc"; 661 const char *pre_cmd[] = { 662 "SO_PATH", NULL /* opensc_so_path */, 663 "ID", NULL /* engine_id */, 664 "LIST_ADD", "1", 665 "LOAD", NULL, 666 NULL, NULL 667 }; 668 669 if (!opensc_so_path) 670 return 0; 671 672 pre_cmd[1] = opensc_so_path; 673 pre_cmd[3] = engine_id; 674 675 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s", 676 opensc_so_path); 677 678 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id); 679 } 680 #endif /* OPENSSL_NO_ENGINE */ 681 682 683 void * tls_init(const struct tls_config *conf) 684 { 685 SSL_CTX *ssl; 686 687 if (tls_openssl_ref_count == 0) { 688 tls_global = os_zalloc(sizeof(*tls_global)); 689 if (tls_global == NULL) 690 return NULL; 691 if (conf) { 692 tls_global->event_cb = conf->event_cb; 693 tls_global->cb_ctx = conf->cb_ctx; 694 tls_global->cert_in_cb = conf->cert_in_cb; 695 } 696 697 #ifdef CONFIG_FIPS 698 #ifdef OPENSSL_FIPS 699 if (conf && conf->fips_mode) { 700 if (!FIPS_mode_set(1)) { 701 wpa_printf(MSG_ERROR, "Failed to enable FIPS " 702 "mode"); 703 ERR_load_crypto_strings(); 704 ERR_print_errors_fp(stderr); 705 return NULL; 706 } else 707 wpa_printf(MSG_INFO, "Running in FIPS mode"); 708 } 709 #else /* OPENSSL_FIPS */ 710 if (conf && conf->fips_mode) { 711 wpa_printf(MSG_ERROR, "FIPS mode requested, but not " 712 "supported"); 713 return NULL; 714 } 715 #endif /* OPENSSL_FIPS */ 716 #endif /* CONFIG_FIPS */ 717 SSL_load_error_strings(); 718 SSL_library_init(); 719 #if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256) 720 EVP_add_digest(EVP_sha256()); 721 #endif /* OPENSSL_NO_SHA256 */ 722 /* TODO: if /dev/urandom is available, PRNG is seeded 723 * automatically. If this is not the case, random data should 724 * be added here. */ 725 726 #ifdef PKCS12_FUNCS 727 #ifndef OPENSSL_NO_RC2 728 /* 729 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it. 730 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8 731 * versions, but it looks like OpenSSL 1.0.0 does not do that 732 * anymore. 733 */ 734 EVP_add_cipher(EVP_rc2_40_cbc()); 735 #endif /* OPENSSL_NO_RC2 */ 736 PKCS12_PBE_add(); 737 #endif /* PKCS12_FUNCS */ 738 } 739 tls_openssl_ref_count++; 740 741 ssl = SSL_CTX_new(TLSv1_method()); 742 if (ssl == NULL) 743 return NULL; 744 745 SSL_CTX_set_info_callback(ssl, ssl_info_cb); 746 747 #ifndef OPENSSL_NO_ENGINE 748 if (conf && 749 (conf->opensc_engine_path || conf->pkcs11_engine_path || 750 conf->pkcs11_module_path)) { 751 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine"); 752 ERR_load_ENGINE_strings(); 753 ENGINE_load_dynamic(); 754 755 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) || 756 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path, 757 conf->pkcs11_module_path)) { 758 tls_deinit(ssl); 759 return NULL; 760 } 761 } 762 #endif /* OPENSSL_NO_ENGINE */ 763 764 return ssl; 765 } 766 767 768 void tls_deinit(void *ssl_ctx) 769 { 770 SSL_CTX *ssl = ssl_ctx; 771 SSL_CTX_free(ssl); 772 773 tls_openssl_ref_count--; 774 if (tls_openssl_ref_count == 0) { 775 #ifndef OPENSSL_NO_ENGINE 776 ENGINE_cleanup(); 777 #endif /* OPENSSL_NO_ENGINE */ 778 CRYPTO_cleanup_all_ex_data(); 779 ERR_remove_state(0); 780 ERR_free_strings(); 781 EVP_cleanup(); 782 os_free(tls_global); 783 tls_global = NULL; 784 } 785 } 786 787 788 static int tls_engine_init(struct tls_connection *conn, const char *engine_id, 789 const char *pin, const char *key_id, 790 const char *cert_id, const char *ca_cert_id) 791 { 792 #ifndef OPENSSL_NO_ENGINE 793 int ret = -1; 794 if (engine_id == NULL) { 795 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set"); 796 return -1; 797 } 798 #ifndef ANDROID 799 if (pin == NULL) { 800 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set"); 801 return -1; 802 } 803 #endif 804 if (key_id == NULL) { 805 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set"); 806 return -1; 807 } 808 809 ERR_clear_error(); 810 #ifdef ANDROID 811 ENGINE_load_dynamic(); 812 #endif 813 conn->engine = ENGINE_by_id(engine_id); 814 if (!conn->engine) { 815 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]", 816 engine_id, ERR_error_string(ERR_get_error(), NULL)); 817 goto err; 818 } 819 if (ENGINE_init(conn->engine) != 1) { 820 wpa_printf(MSG_ERROR, "ENGINE: engine init failed " 821 "(engine: %s) [%s]", engine_id, 822 ERR_error_string(ERR_get_error(), NULL)); 823 goto err; 824 } 825 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized"); 826 827 #ifndef ANDROID 828 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) { 829 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]", 830 ERR_error_string(ERR_get_error(), NULL)); 831 goto err; 832 } 833 #endif 834 /* load private key first in-case PIN is required for cert */ 835 conn->private_key = ENGINE_load_private_key(conn->engine, 836 key_id, NULL, NULL); 837 if (!conn->private_key) { 838 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id" 839 " '%s' [%s]", key_id, 840 ERR_error_string(ERR_get_error(), NULL)); 841 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 842 goto err; 843 } 844 845 /* handle a certificate and/or CA certificate */ 846 if (cert_id || ca_cert_id) { 847 const char *cmd_name = "LOAD_CERT_CTRL"; 848 849 /* test if the engine supports a LOAD_CERT_CTRL */ 850 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME, 851 0, (void *)cmd_name, NULL)) { 852 wpa_printf(MSG_ERROR, "ENGINE: engine does not support" 853 " loading certificates"); 854 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 855 goto err; 856 } 857 } 858 859 return 0; 860 861 err: 862 if (conn->engine) { 863 ENGINE_free(conn->engine); 864 conn->engine = NULL; 865 } 866 867 if (conn->private_key) { 868 EVP_PKEY_free(conn->private_key); 869 conn->private_key = NULL; 870 } 871 872 return ret; 873 #else /* OPENSSL_NO_ENGINE */ 874 return 0; 875 #endif /* OPENSSL_NO_ENGINE */ 876 } 877 878 879 static void tls_engine_deinit(struct tls_connection *conn) 880 { 881 #ifndef OPENSSL_NO_ENGINE 882 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit"); 883 if (conn->private_key) { 884 EVP_PKEY_free(conn->private_key); 885 conn->private_key = NULL; 886 } 887 if (conn->engine) { 888 ENGINE_finish(conn->engine); 889 conn->engine = NULL; 890 } 891 #endif /* OPENSSL_NO_ENGINE */ 892 } 893 894 895 int tls_get_errors(void *ssl_ctx) 896 { 897 int count = 0; 898 unsigned long err; 899 900 while ((err = ERR_get_error())) { 901 wpa_printf(MSG_INFO, "TLS - SSL error: %s", 902 ERR_error_string(err, NULL)); 903 count++; 904 } 905 906 return count; 907 } 908 909 struct tls_connection * tls_connection_init(void *ssl_ctx) 910 { 911 SSL_CTX *ssl = ssl_ctx; 912 struct tls_connection *conn; 913 long options; 914 915 conn = os_zalloc(sizeof(*conn)); 916 if (conn == NULL) 917 return NULL; 918 conn->ssl = SSL_new(ssl); 919 if (conn->ssl == NULL) { 920 tls_show_errors(MSG_INFO, __func__, 921 "Failed to initialize new SSL connection"); 922 os_free(conn); 923 return NULL; 924 } 925 926 SSL_set_app_data(conn->ssl, conn); 927 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | 928 SSL_OP_SINGLE_DH_USE; 929 #ifdef SSL_OP_NO_COMPRESSION 930 options |= SSL_OP_NO_COMPRESSION; 931 #endif /* SSL_OP_NO_COMPRESSION */ 932 #ifdef ANDROID 933 options |= SSL_OP_NO_TLSv1_1; 934 options |= SSL_OP_NO_TLSv1_2; 935 options |= SSL_OP_NO_TICKET; 936 #endif /* ANDROID */ 937 SSL_set_options(conn->ssl, options); 938 939 conn->ssl_in = BIO_new(BIO_s_mem()); 940 if (!conn->ssl_in) { 941 tls_show_errors(MSG_INFO, __func__, 942 "Failed to create a new BIO for ssl_in"); 943 SSL_free(conn->ssl); 944 os_free(conn); 945 return NULL; 946 } 947 948 conn->ssl_out = BIO_new(BIO_s_mem()); 949 if (!conn->ssl_out) { 950 tls_show_errors(MSG_INFO, __func__, 951 "Failed to create a new BIO for ssl_out"); 952 SSL_free(conn->ssl); 953 BIO_free(conn->ssl_in); 954 os_free(conn); 955 return NULL; 956 } 957 958 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out); 959 960 return conn; 961 } 962 963 964 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) 965 { 966 if (conn == NULL) 967 return; 968 SSL_free(conn->ssl); 969 tls_engine_deinit(conn); 970 os_free(conn->subject_match); 971 os_free(conn->altsubject_match); 972 os_free(conn->session_ticket); 973 os_free(conn); 974 } 975 976 977 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) 978 { 979 return conn ? SSL_is_init_finished(conn->ssl) : 0; 980 } 981 982 983 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) 984 { 985 if (conn == NULL) 986 return -1; 987 988 /* Shutdown previous TLS connection without notifying the peer 989 * because the connection was already terminated in practice 990 * and "close notify" shutdown alert would confuse AS. */ 991 SSL_set_quiet_shutdown(conn->ssl, 1); 992 SSL_shutdown(conn->ssl); 993 return 0; 994 } 995 996 997 static int tls_match_altsubject_component(X509 *cert, int type, 998 const char *value, size_t len) 999 { 1000 GENERAL_NAME *gen; 1001 void *ext; 1002 int i, found = 0; 1003 1004 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); 1005 1006 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { 1007 gen = sk_GENERAL_NAME_value(ext, i); 1008 if (gen->type != type) 1009 continue; 1010 if (os_strlen((char *) gen->d.ia5->data) == len && 1011 os_memcmp(value, gen->d.ia5->data, len) == 0) 1012 found++; 1013 } 1014 1015 return found; 1016 } 1017 1018 1019 static int tls_match_altsubject(X509 *cert, const char *match) 1020 { 1021 int type; 1022 const char *pos, *end; 1023 size_t len; 1024 1025 pos = match; 1026 do { 1027 if (os_strncmp(pos, "EMAIL:", 6) == 0) { 1028 type = GEN_EMAIL; 1029 pos += 6; 1030 } else if (os_strncmp(pos, "DNS:", 4) == 0) { 1031 type = GEN_DNS; 1032 pos += 4; 1033 } else if (os_strncmp(pos, "URI:", 4) == 0) { 1034 type = GEN_URI; 1035 pos += 4; 1036 } else { 1037 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName " 1038 "match '%s'", pos); 1039 return 0; 1040 } 1041 end = os_strchr(pos, ';'); 1042 while (end) { 1043 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 || 1044 os_strncmp(end + 1, "DNS:", 4) == 0 || 1045 os_strncmp(end + 1, "URI:", 4) == 0) 1046 break; 1047 end = os_strchr(end + 1, ';'); 1048 } 1049 if (end) 1050 len = end - pos; 1051 else 1052 len = os_strlen(pos); 1053 if (tls_match_altsubject_component(cert, type, pos, len) > 0) 1054 return 1; 1055 pos = end + 1; 1056 } while (end); 1057 1058 return 0; 1059 } 1060 1061 1062 static enum tls_fail_reason openssl_tls_fail_reason(int err) 1063 { 1064 switch (err) { 1065 case X509_V_ERR_CERT_REVOKED: 1066 return TLS_FAIL_REVOKED; 1067 case X509_V_ERR_CERT_NOT_YET_VALID: 1068 case X509_V_ERR_CRL_NOT_YET_VALID: 1069 return TLS_FAIL_NOT_YET_VALID; 1070 case X509_V_ERR_CERT_HAS_EXPIRED: 1071 case X509_V_ERR_CRL_HAS_EXPIRED: 1072 return TLS_FAIL_EXPIRED; 1073 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 1074 case X509_V_ERR_UNABLE_TO_GET_CRL: 1075 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 1076 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 1077 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 1078 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 1079 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 1080 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 1081 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 1082 case X509_V_ERR_INVALID_CA: 1083 return TLS_FAIL_UNTRUSTED; 1084 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 1085 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 1086 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 1087 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 1088 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 1089 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 1090 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 1091 case X509_V_ERR_CERT_UNTRUSTED: 1092 case X509_V_ERR_CERT_REJECTED: 1093 return TLS_FAIL_BAD_CERTIFICATE; 1094 default: 1095 return TLS_FAIL_UNSPECIFIED; 1096 } 1097 } 1098 1099 1100 static struct wpabuf * get_x509_cert(X509 *cert) 1101 { 1102 struct wpabuf *buf; 1103 u8 *tmp; 1104 1105 int cert_len = i2d_X509(cert, NULL); 1106 if (cert_len <= 0) 1107 return NULL; 1108 1109 buf = wpabuf_alloc(cert_len); 1110 if (buf == NULL) 1111 return NULL; 1112 1113 tmp = wpabuf_put(buf, cert_len); 1114 i2d_X509(cert, &tmp); 1115 return buf; 1116 } 1117 1118 1119 static void openssl_tls_fail_event(struct tls_connection *conn, 1120 X509 *err_cert, int err, int depth, 1121 const char *subject, const char *err_str, 1122 enum tls_fail_reason reason) 1123 { 1124 union tls_event_data ev; 1125 struct wpabuf *cert = NULL; 1126 1127 if (tls_global->event_cb == NULL) 1128 return; 1129 1130 cert = get_x509_cert(err_cert); 1131 os_memset(&ev, 0, sizeof(ev)); 1132 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ? 1133 reason : openssl_tls_fail_reason(err); 1134 ev.cert_fail.depth = depth; 1135 ev.cert_fail.subject = subject; 1136 ev.cert_fail.reason_txt = err_str; 1137 ev.cert_fail.cert = cert; 1138 tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); 1139 wpabuf_free(cert); 1140 } 1141 1142 1143 static void openssl_tls_cert_event(struct tls_connection *conn, 1144 X509 *err_cert, int depth, 1145 const char *subject) 1146 { 1147 struct wpabuf *cert = NULL; 1148 union tls_event_data ev; 1149 #ifdef CONFIG_SHA256 1150 u8 hash[32]; 1151 #endif /* CONFIG_SHA256 */ 1152 1153 if (tls_global->event_cb == NULL) 1154 return; 1155 1156 os_memset(&ev, 0, sizeof(ev)); 1157 if (conn->cert_probe || tls_global->cert_in_cb) { 1158 cert = get_x509_cert(err_cert); 1159 ev.peer_cert.cert = cert; 1160 } 1161 #ifdef CONFIG_SHA256 1162 if (cert) { 1163 const u8 *addr[1]; 1164 size_t len[1]; 1165 addr[0] = wpabuf_head(cert); 1166 len[0] = wpabuf_len(cert); 1167 if (sha256_vector(1, addr, len, hash) == 0) { 1168 ev.peer_cert.hash = hash; 1169 ev.peer_cert.hash_len = sizeof(hash); 1170 } 1171 } 1172 #endif /* CONFIG_SHA256 */ 1173 ev.peer_cert.depth = depth; 1174 ev.peer_cert.subject = subject; 1175 tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev); 1176 wpabuf_free(cert); 1177 } 1178 1179 1180 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) 1181 { 1182 char buf[256]; 1183 X509 *err_cert; 1184 int err, depth; 1185 SSL *ssl; 1186 struct tls_connection *conn; 1187 char *match, *altmatch; 1188 const char *err_str; 1189 1190 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); 1191 err = X509_STORE_CTX_get_error(x509_ctx); 1192 depth = X509_STORE_CTX_get_error_depth(x509_ctx); 1193 ssl = X509_STORE_CTX_get_ex_data(x509_ctx, 1194 SSL_get_ex_data_X509_STORE_CTX_idx()); 1195 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); 1196 1197 conn = SSL_get_app_data(ssl); 1198 if (conn == NULL) 1199 return 0; 1200 match = conn->subject_match; 1201 altmatch = conn->altsubject_match; 1202 1203 if (!preverify_ok && !conn->ca_cert_verify) 1204 preverify_ok = 1; 1205 if (!preverify_ok && depth > 0 && conn->server_cert_only) 1206 preverify_ok = 1; 1207 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) && 1208 (err == X509_V_ERR_CERT_HAS_EXPIRED || 1209 err == X509_V_ERR_CERT_NOT_YET_VALID)) { 1210 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity " 1211 "time mismatch"); 1212 preverify_ok = 1; 1213 } 1214 1215 err_str = X509_verify_cert_error_string(err); 1216 1217 #ifdef CONFIG_SHA256 1218 if (preverify_ok && depth == 0 && conn->server_cert_only) { 1219 struct wpabuf *cert; 1220 cert = get_x509_cert(err_cert); 1221 if (!cert) { 1222 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch " 1223 "server certificate data"); 1224 preverify_ok = 0; 1225 } else { 1226 u8 hash[32]; 1227 const u8 *addr[1]; 1228 size_t len[1]; 1229 addr[0] = wpabuf_head(cert); 1230 len[0] = wpabuf_len(cert); 1231 if (sha256_vector(1, addr, len, hash) < 0 || 1232 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) { 1233 err_str = "Server certificate mismatch"; 1234 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN; 1235 preverify_ok = 0; 1236 } 1237 wpabuf_free(cert); 1238 } 1239 } 1240 #endif /* CONFIG_SHA256 */ 1241 1242 if (!preverify_ok) { 1243 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," 1244 " error %d (%s) depth %d for '%s'", err, err_str, 1245 depth, buf); 1246 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1247 err_str, TLS_FAIL_UNSPECIFIED); 1248 return preverify_ok; 1249 } 1250 1251 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d " 1252 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'", 1253 preverify_ok, err, err_str, 1254 conn->ca_cert_verify, depth, buf); 1255 if (depth == 0 && match && os_strstr(buf, match) == NULL) { 1256 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " 1257 "match with '%s'", buf, match); 1258 preverify_ok = 0; 1259 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1260 "Subject mismatch", 1261 TLS_FAIL_SUBJECT_MISMATCH); 1262 } else if (depth == 0 && altmatch && 1263 !tls_match_altsubject(err_cert, altmatch)) { 1264 wpa_printf(MSG_WARNING, "TLS: altSubjectName match " 1265 "'%s' not found", altmatch); 1266 preverify_ok = 0; 1267 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1268 "AltSubject mismatch", 1269 TLS_FAIL_ALTSUBJECT_MISMATCH); 1270 } else 1271 openssl_tls_cert_event(conn, err_cert, depth, buf); 1272 1273 if (conn->cert_probe && preverify_ok && depth == 0) { 1274 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate " 1275 "on probe-only run"); 1276 preverify_ok = 0; 1277 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1278 "Server certificate chain probe", 1279 TLS_FAIL_SERVER_CHAIN_PROBE); 1280 } 1281 1282 return preverify_ok; 1283 } 1284 1285 1286 #ifndef OPENSSL_NO_STDIO 1287 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert) 1288 { 1289 SSL_CTX *ssl_ctx = _ssl_ctx; 1290 X509_LOOKUP *lookup; 1291 int ret = 0; 1292 1293 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store, 1294 X509_LOOKUP_file()); 1295 if (lookup == NULL) { 1296 tls_show_errors(MSG_WARNING, __func__, 1297 "Failed add lookup for X509 store"); 1298 return -1; 1299 } 1300 1301 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) { 1302 unsigned long err = ERR_peek_error(); 1303 tls_show_errors(MSG_WARNING, __func__, 1304 "Failed load CA in DER format"); 1305 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1306 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1307 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1308 "cert already in hash table error", 1309 __func__); 1310 } else 1311 ret = -1; 1312 } 1313 1314 return ret; 1315 } 1316 #endif /* OPENSSL_NO_STDIO */ 1317 1318 1319 #ifdef ANDROID 1320 static BIO * BIO_from_keystore(const char *key) 1321 { 1322 BIO *bio = NULL; 1323 char value[KEYSTORE_MESSAGE_SIZE]; 1324 int length = keystore_get(key, strlen(key), value); 1325 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL) 1326 BIO_write(bio, value, length); 1327 return bio; 1328 } 1329 #endif /* ANDROID */ 1330 1331 1332 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn, 1333 const char *ca_cert, const u8 *ca_cert_blob, 1334 size_t ca_cert_blob_len, const char *ca_path) 1335 { 1336 SSL_CTX *ssl_ctx = _ssl_ctx; 1337 1338 /* 1339 * Remove previously configured trusted CA certificates before adding 1340 * new ones. 1341 */ 1342 X509_STORE_free(ssl_ctx->cert_store); 1343 ssl_ctx->cert_store = X509_STORE_new(); 1344 if (ssl_ctx->cert_store == NULL) { 1345 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 1346 "certificate store", __func__); 1347 return -1; 1348 } 1349 1350 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1351 conn->ca_cert_verify = 1; 1352 1353 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) { 1354 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate " 1355 "chain"); 1356 conn->cert_probe = 1; 1357 conn->ca_cert_verify = 0; 1358 return 0; 1359 } 1360 1361 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) { 1362 #ifdef CONFIG_SHA256 1363 const char *pos = ca_cert + 7; 1364 if (os_strncmp(pos, "server/sha256/", 14) != 0) { 1365 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert " 1366 "hash value '%s'", ca_cert); 1367 return -1; 1368 } 1369 pos += 14; 1370 if (os_strlen(pos) != 32 * 2) { 1371 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 " 1372 "hash length in ca_cert '%s'", ca_cert); 1373 return -1; 1374 } 1375 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) { 1376 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash " 1377 "value in ca_cert '%s'", ca_cert); 1378 return -1; 1379 } 1380 conn->server_cert_only = 1; 1381 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server " 1382 "certificate match"); 1383 return 0; 1384 #else /* CONFIG_SHA256 */ 1385 wpa_printf(MSG_INFO, "No SHA256 included in the build - " 1386 "cannot validate server certificate hash"); 1387 return -1; 1388 #endif /* CONFIG_SHA256 */ 1389 } 1390 1391 if (ca_cert_blob) { 1392 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob, 1393 ca_cert_blob_len); 1394 if (cert == NULL) { 1395 tls_show_errors(MSG_WARNING, __func__, 1396 "Failed to parse ca_cert_blob"); 1397 return -1; 1398 } 1399 1400 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 1401 unsigned long err = ERR_peek_error(); 1402 tls_show_errors(MSG_WARNING, __func__, 1403 "Failed to add ca_cert_blob to " 1404 "certificate store"); 1405 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1406 ERR_GET_REASON(err) == 1407 X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1408 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1409 "cert already in hash table error", 1410 __func__); 1411 } else { 1412 X509_free(cert); 1413 return -1; 1414 } 1415 } 1416 X509_free(cert); 1417 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob " 1418 "to certificate store", __func__); 1419 return 0; 1420 } 1421 1422 #ifdef ANDROID 1423 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) { 1424 BIO *bio = BIO_from_keystore(&ca_cert[11]); 1425 STACK_OF(X509_INFO) *stack = NULL; 1426 int i; 1427 1428 if (bio) { 1429 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL); 1430 BIO_free(bio); 1431 } 1432 if (!stack) 1433 return -1; 1434 1435 for (i = 0; i < sk_X509_INFO_num(stack); ++i) { 1436 X509_INFO *info = sk_X509_INFO_value(stack, i); 1437 if (info->x509) { 1438 X509_STORE_add_cert(ssl_ctx->cert_store, 1439 info->x509); 1440 } 1441 if (info->crl) { 1442 X509_STORE_add_crl(ssl_ctx->cert_store, 1443 info->crl); 1444 } 1445 } 1446 sk_X509_INFO_pop_free(stack, X509_INFO_free); 1447 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1448 return 0; 1449 } 1450 #endif /* ANDROID */ 1451 1452 #ifdef CONFIG_NATIVE_WINDOWS 1453 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) == 1454 0) { 1455 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from " 1456 "system certificate store"); 1457 return 0; 1458 } 1459 #endif /* CONFIG_NATIVE_WINDOWS */ 1460 1461 if (ca_cert || ca_path) { 1462 #ifndef OPENSSL_NO_STDIO 1463 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) != 1464 1) { 1465 tls_show_errors(MSG_WARNING, __func__, 1466 "Failed to load root certificates"); 1467 if (ca_cert && 1468 tls_load_ca_der(ssl_ctx, ca_cert) == 0) { 1469 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded " 1470 "DER format CA certificate", 1471 __func__); 1472 } else 1473 return -1; 1474 } else { 1475 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 1476 "certificate(s) loaded"); 1477 tls_get_errors(ssl_ctx); 1478 } 1479 #else /* OPENSSL_NO_STDIO */ 1480 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 1481 __func__); 1482 return -1; 1483 #endif /* OPENSSL_NO_STDIO */ 1484 } else { 1485 /* No ca_cert configured - do not try to verify server 1486 * certificate */ 1487 conn->ca_cert_verify = 0; 1488 } 1489 1490 return 0; 1491 } 1492 1493 1494 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert) 1495 { 1496 if (ca_cert) { 1497 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1) 1498 { 1499 tls_show_errors(MSG_WARNING, __func__, 1500 "Failed to load root certificates"); 1501 return -1; 1502 } 1503 1504 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 1505 "certificate(s) loaded"); 1506 1507 #ifndef OPENSSL_NO_STDIO 1508 /* Add the same CAs to the client certificate requests */ 1509 SSL_CTX_set_client_CA_list(ssl_ctx, 1510 SSL_load_client_CA_file(ca_cert)); 1511 #endif /* OPENSSL_NO_STDIO */ 1512 } 1513 1514 return 0; 1515 } 1516 1517 1518 int tls_global_set_verify(void *ssl_ctx, int check_crl) 1519 { 1520 int flags; 1521 1522 if (check_crl) { 1523 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx); 1524 if (cs == NULL) { 1525 tls_show_errors(MSG_INFO, __func__, "Failed to get " 1526 "certificate store when enabling " 1527 "check_crl"); 1528 return -1; 1529 } 1530 flags = X509_V_FLAG_CRL_CHECK; 1531 if (check_crl == 2) 1532 flags |= X509_V_FLAG_CRL_CHECK_ALL; 1533 X509_STORE_set_flags(cs, flags); 1534 } 1535 return 0; 1536 } 1537 1538 1539 static int tls_connection_set_subject_match(struct tls_connection *conn, 1540 const char *subject_match, 1541 const char *altsubject_match) 1542 { 1543 os_free(conn->subject_match); 1544 conn->subject_match = NULL; 1545 if (subject_match) { 1546 conn->subject_match = os_strdup(subject_match); 1547 if (conn->subject_match == NULL) 1548 return -1; 1549 } 1550 1551 os_free(conn->altsubject_match); 1552 conn->altsubject_match = NULL; 1553 if (altsubject_match) { 1554 conn->altsubject_match = os_strdup(altsubject_match); 1555 if (conn->altsubject_match == NULL) 1556 return -1; 1557 } 1558 1559 return 0; 1560 } 1561 1562 1563 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, 1564 int verify_peer) 1565 { 1566 static int counter = 0; 1567 1568 if (conn == NULL) 1569 return -1; 1570 1571 if (verify_peer) { 1572 conn->ca_cert_verify = 1; 1573 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER | 1574 SSL_VERIFY_FAIL_IF_NO_PEER_CERT | 1575 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb); 1576 } else { 1577 conn->ca_cert_verify = 0; 1578 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL); 1579 } 1580 1581 SSL_set_accept_state(conn->ssl); 1582 1583 /* 1584 * Set session id context in order to avoid fatal errors when client 1585 * tries to resume a session. However, set the context to a unique 1586 * value in order to effectively disable session resumption for now 1587 * since not all areas of the server code are ready for it (e.g., 1588 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS 1589 * handshake). 1590 */ 1591 counter++; 1592 SSL_set_session_id_context(conn->ssl, 1593 (const unsigned char *) &counter, 1594 sizeof(counter)); 1595 1596 return 0; 1597 } 1598 1599 1600 static int tls_connection_client_cert(struct tls_connection *conn, 1601 const char *client_cert, 1602 const u8 *client_cert_blob, 1603 size_t client_cert_blob_len) 1604 { 1605 if (client_cert == NULL && client_cert_blob == NULL) 1606 return 0; 1607 1608 if (client_cert_blob && 1609 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob, 1610 client_cert_blob_len) == 1) { 1611 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> " 1612 "OK"); 1613 return 0; 1614 } else if (client_cert_blob) { 1615 tls_show_errors(MSG_DEBUG, __func__, 1616 "SSL_use_certificate_ASN1 failed"); 1617 } 1618 1619 if (client_cert == NULL) 1620 return -1; 1621 1622 #ifdef ANDROID 1623 if (os_strncmp("keystore://", client_cert, 11) == 0) { 1624 BIO *bio = BIO_from_keystore(&client_cert[11]); 1625 X509 *x509 = NULL; 1626 int ret = -1; 1627 if (bio) { 1628 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); 1629 BIO_free(bio); 1630 } 1631 if (x509) { 1632 if (SSL_use_certificate(conn->ssl, x509) == 1) 1633 ret = 0; 1634 X509_free(x509); 1635 } 1636 return ret; 1637 } 1638 #endif /* ANDROID */ 1639 1640 #ifndef OPENSSL_NO_STDIO 1641 if (SSL_use_certificate_file(conn->ssl, client_cert, 1642 SSL_FILETYPE_ASN1) == 1) { 1643 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)" 1644 " --> OK"); 1645 return 0; 1646 } 1647 1648 if (SSL_use_certificate_file(conn->ssl, client_cert, 1649 SSL_FILETYPE_PEM) == 1) { 1650 ERR_clear_error(); 1651 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)" 1652 " --> OK"); 1653 return 0; 1654 } 1655 1656 tls_show_errors(MSG_DEBUG, __func__, 1657 "SSL_use_certificate_file failed"); 1658 #else /* OPENSSL_NO_STDIO */ 1659 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 1660 #endif /* OPENSSL_NO_STDIO */ 1661 1662 return -1; 1663 } 1664 1665 1666 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert) 1667 { 1668 #ifndef OPENSSL_NO_STDIO 1669 if (client_cert == NULL) 1670 return 0; 1671 1672 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 1673 SSL_FILETYPE_ASN1) != 1 && 1674 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 && 1675 SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 1676 SSL_FILETYPE_PEM) != 1) { 1677 tls_show_errors(MSG_INFO, __func__, 1678 "Failed to load client certificate"); 1679 return -1; 1680 } 1681 return 0; 1682 #else /* OPENSSL_NO_STDIO */ 1683 if (client_cert == NULL) 1684 return 0; 1685 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 1686 return -1; 1687 #endif /* OPENSSL_NO_STDIO */ 1688 } 1689 1690 1691 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password) 1692 { 1693 if (password == NULL) { 1694 return 0; 1695 } 1696 os_strlcpy(buf, (char *) password, size); 1697 return os_strlen(buf); 1698 } 1699 1700 1701 #ifdef PKCS12_FUNCS 1702 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12, 1703 const char *passwd) 1704 { 1705 EVP_PKEY *pkey; 1706 X509 *cert; 1707 STACK_OF(X509) *certs; 1708 int res = 0; 1709 char buf[256]; 1710 1711 pkey = NULL; 1712 cert = NULL; 1713 certs = NULL; 1714 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) { 1715 tls_show_errors(MSG_DEBUG, __func__, 1716 "Failed to parse PKCS12 file"); 1717 PKCS12_free(p12); 1718 return -1; 1719 } 1720 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data"); 1721 1722 if (cert) { 1723 X509_NAME_oneline(X509_get_subject_name(cert), buf, 1724 sizeof(buf)); 1725 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: " 1726 "subject='%s'", buf); 1727 if (ssl) { 1728 if (SSL_use_certificate(ssl, cert) != 1) 1729 res = -1; 1730 } else { 1731 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1) 1732 res = -1; 1733 } 1734 X509_free(cert); 1735 } 1736 1737 if (pkey) { 1738 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12"); 1739 if (ssl) { 1740 if (SSL_use_PrivateKey(ssl, pkey) != 1) 1741 res = -1; 1742 } else { 1743 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1) 1744 res = -1; 1745 } 1746 EVP_PKEY_free(pkey); 1747 } 1748 1749 if (certs) { 1750 while ((cert = sk_X509_pop(certs)) != NULL) { 1751 X509_NAME_oneline(X509_get_subject_name(cert), buf, 1752 sizeof(buf)); 1753 wpa_printf(MSG_DEBUG, "TLS: additional certificate" 1754 " from PKCS12: subject='%s'", buf); 1755 /* 1756 * There is no SSL equivalent for the chain cert - so 1757 * always add it to the context... 1758 */ 1759 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) { 1760 res = -1; 1761 break; 1762 } 1763 } 1764 sk_X509_free(certs); 1765 } 1766 1767 PKCS12_free(p12); 1768 1769 if (res < 0) 1770 tls_get_errors(ssl_ctx); 1771 1772 return res; 1773 } 1774 #endif /* PKCS12_FUNCS */ 1775 1776 1777 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key, 1778 const char *passwd) 1779 { 1780 #ifdef PKCS12_FUNCS 1781 FILE *f; 1782 PKCS12 *p12; 1783 1784 f = fopen(private_key, "rb"); 1785 if (f == NULL) 1786 return -1; 1787 1788 p12 = d2i_PKCS12_fp(f, NULL); 1789 fclose(f); 1790 1791 if (p12 == NULL) { 1792 tls_show_errors(MSG_INFO, __func__, 1793 "Failed to use PKCS#12 file"); 1794 return -1; 1795 } 1796 1797 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); 1798 1799 #else /* PKCS12_FUNCS */ 1800 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read " 1801 "p12/pfx files"); 1802 return -1; 1803 #endif /* PKCS12_FUNCS */ 1804 } 1805 1806 1807 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl, 1808 const u8 *blob, size_t len, const char *passwd) 1809 { 1810 #ifdef PKCS12_FUNCS 1811 PKCS12 *p12; 1812 1813 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len); 1814 if (p12 == NULL) { 1815 tls_show_errors(MSG_INFO, __func__, 1816 "Failed to use PKCS#12 blob"); 1817 return -1; 1818 } 1819 1820 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); 1821 1822 #else /* PKCS12_FUNCS */ 1823 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse " 1824 "p12/pfx blobs"); 1825 return -1; 1826 #endif /* PKCS12_FUNCS */ 1827 } 1828 1829 1830 #ifndef OPENSSL_NO_ENGINE 1831 static int tls_engine_get_cert(struct tls_connection *conn, 1832 const char *cert_id, 1833 X509 **cert) 1834 { 1835 /* this runs after the private key is loaded so no PIN is required */ 1836 struct { 1837 const char *cert_id; 1838 X509 *cert; 1839 } params; 1840 params.cert_id = cert_id; 1841 params.cert = NULL; 1842 1843 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL", 1844 0, ¶ms, NULL, 1)) { 1845 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id" 1846 " '%s' [%s]", cert_id, 1847 ERR_error_string(ERR_get_error(), NULL)); 1848 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1849 } 1850 if (!params.cert) { 1851 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id" 1852 " '%s'", cert_id); 1853 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1854 } 1855 *cert = params.cert; 1856 return 0; 1857 } 1858 #endif /* OPENSSL_NO_ENGINE */ 1859 1860 1861 static int tls_connection_engine_client_cert(struct tls_connection *conn, 1862 const char *cert_id) 1863 { 1864 #ifndef OPENSSL_NO_ENGINE 1865 X509 *cert; 1866 1867 if (tls_engine_get_cert(conn, cert_id, &cert)) 1868 return -1; 1869 1870 if (!SSL_use_certificate(conn->ssl, cert)) { 1871 tls_show_errors(MSG_ERROR, __func__, 1872 "SSL_use_certificate failed"); 1873 X509_free(cert); 1874 return -1; 1875 } 1876 X509_free(cert); 1877 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> " 1878 "OK"); 1879 return 0; 1880 1881 #else /* OPENSSL_NO_ENGINE */ 1882 return -1; 1883 #endif /* OPENSSL_NO_ENGINE */ 1884 } 1885 1886 1887 static int tls_connection_engine_ca_cert(void *_ssl_ctx, 1888 struct tls_connection *conn, 1889 const char *ca_cert_id) 1890 { 1891 #ifndef OPENSSL_NO_ENGINE 1892 X509 *cert; 1893 SSL_CTX *ssl_ctx = _ssl_ctx; 1894 1895 if (tls_engine_get_cert(conn, ca_cert_id, &cert)) 1896 return -1; 1897 1898 /* start off the same as tls_connection_ca_cert */ 1899 X509_STORE_free(ssl_ctx->cert_store); 1900 ssl_ctx->cert_store = X509_STORE_new(); 1901 if (ssl_ctx->cert_store == NULL) { 1902 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 1903 "certificate store", __func__); 1904 X509_free(cert); 1905 return -1; 1906 } 1907 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 1908 unsigned long err = ERR_peek_error(); 1909 tls_show_errors(MSG_WARNING, __func__, 1910 "Failed to add CA certificate from engine " 1911 "to certificate store"); 1912 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1913 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1914 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert" 1915 " already in hash table error", 1916 __func__); 1917 } else { 1918 X509_free(cert); 1919 return -1; 1920 } 1921 } 1922 X509_free(cert); 1923 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine " 1924 "to certificate store", __func__); 1925 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1926 return 0; 1927 1928 #else /* OPENSSL_NO_ENGINE */ 1929 return -1; 1930 #endif /* OPENSSL_NO_ENGINE */ 1931 } 1932 1933 1934 static int tls_connection_engine_private_key(struct tls_connection *conn) 1935 { 1936 #ifndef OPENSSL_NO_ENGINE 1937 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) { 1938 tls_show_errors(MSG_ERROR, __func__, 1939 "ENGINE: cannot use private key for TLS"); 1940 return -1; 1941 } 1942 if (!SSL_check_private_key(conn->ssl)) { 1943 tls_show_errors(MSG_INFO, __func__, 1944 "Private key failed verification"); 1945 return -1; 1946 } 1947 return 0; 1948 #else /* OPENSSL_NO_ENGINE */ 1949 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but " 1950 "engine support was not compiled in"); 1951 return -1; 1952 #endif /* OPENSSL_NO_ENGINE */ 1953 } 1954 1955 1956 static int tls_connection_private_key(void *_ssl_ctx, 1957 struct tls_connection *conn, 1958 const char *private_key, 1959 const char *private_key_passwd, 1960 const u8 *private_key_blob, 1961 size_t private_key_blob_len) 1962 { 1963 SSL_CTX *ssl_ctx = _ssl_ctx; 1964 char *passwd; 1965 int ok; 1966 1967 if (private_key == NULL && private_key_blob == NULL) 1968 return 0; 1969 1970 if (private_key_passwd) { 1971 passwd = os_strdup(private_key_passwd); 1972 if (passwd == NULL) 1973 return -1; 1974 } else 1975 passwd = NULL; 1976 1977 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 1978 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 1979 1980 ok = 0; 1981 while (private_key_blob) { 1982 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, 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_RSA) --> OK"); 1987 ok = 1; 1988 break; 1989 } 1990 1991 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl, 1992 (u8 *) private_key_blob, 1993 private_key_blob_len) == 1) { 1994 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 1995 "ASN1(EVP_PKEY_DSA) --> OK"); 1996 ok = 1; 1997 break; 1998 } 1999 2000 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl, 2001 (u8 *) private_key_blob, 2002 private_key_blob_len) == 1) { 2003 wpa_printf(MSG_DEBUG, "OpenSSL: " 2004 "SSL_use_RSAPrivateKey_ASN1 --> OK"); 2005 ok = 1; 2006 break; 2007 } 2008 2009 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob, 2010 private_key_blob_len, passwd) == 0) { 2011 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> " 2012 "OK"); 2013 ok = 1; 2014 break; 2015 } 2016 2017 break; 2018 } 2019 2020 #ifdef ANDROID 2021 if (!ok && private_key && 2022 os_strncmp("keystore://", private_key, 11) == 0) { 2023 BIO *bio = BIO_from_keystore(&private_key[11]); 2024 EVP_PKEY *pkey = NULL; 2025 if (bio) { 2026 pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL); 2027 BIO_free(bio); 2028 } 2029 if (pkey) { 2030 if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) { 2031 wpa_printf(MSG_DEBUG, "OpenSSL: Private key " 2032 "from keystore"); 2033 ok = 1; 2034 } 2035 EVP_PKEY_free(pkey); 2036 } 2037 } 2038 #endif /* ANDROID */ 2039 2040 while (!ok && private_key) { 2041 #ifndef OPENSSL_NO_STDIO 2042 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2043 SSL_FILETYPE_ASN1) == 1) { 2044 wpa_printf(MSG_DEBUG, "OpenSSL: " 2045 "SSL_use_PrivateKey_File (DER) --> OK"); 2046 ok = 1; 2047 break; 2048 } 2049 2050 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2051 SSL_FILETYPE_PEM) == 1) { 2052 wpa_printf(MSG_DEBUG, "OpenSSL: " 2053 "SSL_use_PrivateKey_File (PEM) --> OK"); 2054 ok = 1; 2055 break; 2056 } 2057 #else /* OPENSSL_NO_STDIO */ 2058 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 2059 __func__); 2060 #endif /* OPENSSL_NO_STDIO */ 2061 2062 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd) 2063 == 0) { 2064 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file " 2065 "--> OK"); 2066 ok = 1; 2067 break; 2068 } 2069 2070 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) { 2071 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to " 2072 "access certificate store --> OK"); 2073 ok = 1; 2074 break; 2075 } 2076 2077 break; 2078 } 2079 2080 if (!ok) { 2081 tls_show_errors(MSG_INFO, __func__, 2082 "Failed to load private key"); 2083 os_free(passwd); 2084 return -1; 2085 } 2086 ERR_clear_error(); 2087 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2088 os_free(passwd); 2089 2090 if (!SSL_check_private_key(conn->ssl)) { 2091 tls_show_errors(MSG_INFO, __func__, "Private key failed " 2092 "verification"); 2093 return -1; 2094 } 2095 2096 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully"); 2097 return 0; 2098 } 2099 2100 2101 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key, 2102 const char *private_key_passwd) 2103 { 2104 char *passwd; 2105 2106 if (private_key == NULL) 2107 return 0; 2108 2109 if (private_key_passwd) { 2110 passwd = os_strdup(private_key_passwd); 2111 if (passwd == NULL) 2112 return -1; 2113 } else 2114 passwd = NULL; 2115 2116 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 2117 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 2118 if ( 2119 #ifndef OPENSSL_NO_STDIO 2120 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2121 SSL_FILETYPE_ASN1) != 1 && 2122 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2123 SSL_FILETYPE_PEM) != 1 && 2124 #endif /* OPENSSL_NO_STDIO */ 2125 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) { 2126 tls_show_errors(MSG_INFO, __func__, 2127 "Failed to load private key"); 2128 os_free(passwd); 2129 ERR_clear_error(); 2130 return -1; 2131 } 2132 os_free(passwd); 2133 ERR_clear_error(); 2134 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2135 2136 if (!SSL_CTX_check_private_key(ssl_ctx)) { 2137 tls_show_errors(MSG_INFO, __func__, 2138 "Private key failed verification"); 2139 return -1; 2140 } 2141 2142 return 0; 2143 } 2144 2145 2146 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file) 2147 { 2148 #ifdef OPENSSL_NO_DH 2149 if (dh_file == NULL) 2150 return 0; 2151 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2152 "dh_file specified"); 2153 return -1; 2154 #else /* OPENSSL_NO_DH */ 2155 DH *dh; 2156 BIO *bio; 2157 2158 /* TODO: add support for dh_blob */ 2159 if (dh_file == NULL) 2160 return 0; 2161 if (conn == NULL) 2162 return -1; 2163 2164 bio = BIO_new_file(dh_file, "r"); 2165 if (bio == NULL) { 2166 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2167 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2168 return -1; 2169 } 2170 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2171 BIO_free(bio); 2172 #ifndef OPENSSL_NO_DSA 2173 while (dh == NULL) { 2174 DSA *dsa; 2175 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2176 " trying to parse as DSA params", dh_file, 2177 ERR_error_string(ERR_get_error(), NULL)); 2178 bio = BIO_new_file(dh_file, "r"); 2179 if (bio == NULL) 2180 break; 2181 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2182 BIO_free(bio); 2183 if (!dsa) { 2184 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2185 "'%s': %s", dh_file, 2186 ERR_error_string(ERR_get_error(), NULL)); 2187 break; 2188 } 2189 2190 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2191 dh = DSA_dup_DH(dsa); 2192 DSA_free(dsa); 2193 if (dh == NULL) { 2194 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2195 "params into DH params"); 2196 break; 2197 } 2198 break; 2199 } 2200 #endif /* !OPENSSL_NO_DSA */ 2201 if (dh == NULL) { 2202 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2203 "'%s'", dh_file); 2204 return -1; 2205 } 2206 2207 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) { 2208 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2209 "%s", dh_file, 2210 ERR_error_string(ERR_get_error(), NULL)); 2211 DH_free(dh); 2212 return -1; 2213 } 2214 DH_free(dh); 2215 return 0; 2216 #endif /* OPENSSL_NO_DH */ 2217 } 2218 2219 2220 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file) 2221 { 2222 #ifdef OPENSSL_NO_DH 2223 if (dh_file == NULL) 2224 return 0; 2225 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2226 "dh_file specified"); 2227 return -1; 2228 #else /* OPENSSL_NO_DH */ 2229 DH *dh; 2230 BIO *bio; 2231 2232 /* TODO: add support for dh_blob */ 2233 if (dh_file == NULL) 2234 return 0; 2235 if (ssl_ctx == NULL) 2236 return -1; 2237 2238 bio = BIO_new_file(dh_file, "r"); 2239 if (bio == NULL) { 2240 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2241 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2242 return -1; 2243 } 2244 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2245 BIO_free(bio); 2246 #ifndef OPENSSL_NO_DSA 2247 while (dh == NULL) { 2248 DSA *dsa; 2249 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2250 " trying to parse as DSA params", dh_file, 2251 ERR_error_string(ERR_get_error(), NULL)); 2252 bio = BIO_new_file(dh_file, "r"); 2253 if (bio == NULL) 2254 break; 2255 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2256 BIO_free(bio); 2257 if (!dsa) { 2258 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2259 "'%s': %s", dh_file, 2260 ERR_error_string(ERR_get_error(), NULL)); 2261 break; 2262 } 2263 2264 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2265 dh = DSA_dup_DH(dsa); 2266 DSA_free(dsa); 2267 if (dh == NULL) { 2268 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2269 "params into DH params"); 2270 break; 2271 } 2272 break; 2273 } 2274 #endif /* !OPENSSL_NO_DSA */ 2275 if (dh == NULL) { 2276 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2277 "'%s'", dh_file); 2278 return -1; 2279 } 2280 2281 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) { 2282 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2283 "%s", dh_file, 2284 ERR_error_string(ERR_get_error(), NULL)); 2285 DH_free(dh); 2286 return -1; 2287 } 2288 DH_free(dh); 2289 return 0; 2290 #endif /* OPENSSL_NO_DH */ 2291 } 2292 2293 2294 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn, 2295 struct tls_keys *keys) 2296 { 2297 SSL *ssl; 2298 2299 if (conn == NULL || keys == NULL) 2300 return -1; 2301 ssl = conn->ssl; 2302 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL) 2303 return -1; 2304 2305 os_memset(keys, 0, sizeof(*keys)); 2306 keys->master_key = ssl->session->master_key; 2307 keys->master_key_len = ssl->session->master_key_length; 2308 keys->client_random = ssl->s3->client_random; 2309 keys->client_random_len = SSL3_RANDOM_SIZE; 2310 keys->server_random = ssl->s3->server_random; 2311 keys->server_random_len = SSL3_RANDOM_SIZE; 2312 2313 return 0; 2314 } 2315 2316 2317 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn, 2318 const char *label, int server_random_first, 2319 u8 *out, size_t out_len) 2320 { 2321 return -1; 2322 } 2323 2324 2325 static struct wpabuf * 2326 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data, 2327 int server) 2328 { 2329 int res; 2330 struct wpabuf *out_data; 2331 2332 /* 2333 * Give TLS handshake data from the server (if available) to OpenSSL 2334 * for processing. 2335 */ 2336 if (in_data && 2337 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data)) 2338 < 0) { 2339 tls_show_errors(MSG_INFO, __func__, 2340 "Handshake failed - BIO_write"); 2341 return NULL; 2342 } 2343 2344 /* Initiate TLS handshake or continue the existing handshake */ 2345 if (server) 2346 res = SSL_accept(conn->ssl); 2347 else 2348 res = SSL_connect(conn->ssl); 2349 if (res != 1) { 2350 int err = SSL_get_error(conn->ssl, res); 2351 if (err == SSL_ERROR_WANT_READ) 2352 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want " 2353 "more data"); 2354 else if (err == SSL_ERROR_WANT_WRITE) 2355 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to " 2356 "write"); 2357 else { 2358 tls_show_errors(MSG_INFO, __func__, "SSL_connect"); 2359 conn->failed++; 2360 } 2361 } 2362 2363 /* Get the TLS handshake data to be sent to the server */ 2364 res = BIO_ctrl_pending(conn->ssl_out); 2365 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res); 2366 out_data = wpabuf_alloc(res); 2367 if (out_data == NULL) { 2368 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for " 2369 "handshake output (%d bytes)", res); 2370 if (BIO_reset(conn->ssl_out) < 0) { 2371 tls_show_errors(MSG_INFO, __func__, 2372 "BIO_reset failed"); 2373 } 2374 return NULL; 2375 } 2376 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data), 2377 res); 2378 if (res < 0) { 2379 tls_show_errors(MSG_INFO, __func__, 2380 "Handshake failed - BIO_read"); 2381 if (BIO_reset(conn->ssl_out) < 0) { 2382 tls_show_errors(MSG_INFO, __func__, 2383 "BIO_reset failed"); 2384 } 2385 wpabuf_free(out_data); 2386 return NULL; 2387 } 2388 wpabuf_put(out_data, res); 2389 2390 return out_data; 2391 } 2392 2393 2394 static struct wpabuf * 2395 openssl_get_appl_data(struct tls_connection *conn, size_t max_len) 2396 { 2397 struct wpabuf *appl_data; 2398 int res; 2399 2400 appl_data = wpabuf_alloc(max_len + 100); 2401 if (appl_data == NULL) 2402 return NULL; 2403 2404 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data), 2405 wpabuf_size(appl_data)); 2406 if (res < 0) { 2407 int err = SSL_get_error(conn->ssl, res); 2408 if (err == SSL_ERROR_WANT_READ || 2409 err == SSL_ERROR_WANT_WRITE) { 2410 wpa_printf(MSG_DEBUG, "SSL: No Application Data " 2411 "included"); 2412 } else { 2413 tls_show_errors(MSG_INFO, __func__, 2414 "Failed to read possible " 2415 "Application Data"); 2416 } 2417 wpabuf_free(appl_data); 2418 return NULL; 2419 } 2420 2421 wpabuf_put(appl_data, res); 2422 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished " 2423 "message", appl_data); 2424 2425 return appl_data; 2426 } 2427 2428 2429 static struct wpabuf * 2430 openssl_connection_handshake(struct tls_connection *conn, 2431 const struct wpabuf *in_data, 2432 struct wpabuf **appl_data, int server) 2433 { 2434 struct wpabuf *out_data; 2435 2436 if (appl_data) 2437 *appl_data = NULL; 2438 2439 out_data = openssl_handshake(conn, in_data, server); 2440 if (out_data == NULL) 2441 return NULL; 2442 2443 if (SSL_is_init_finished(conn->ssl) && appl_data && in_data) 2444 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data)); 2445 2446 return out_data; 2447 } 2448 2449 2450 struct wpabuf * 2451 tls_connection_handshake(void *ssl_ctx, 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, 0); 2456 } 2457 2458 2459 struct wpabuf * tls_connection_server_handshake(void *tls_ctx, 2460 struct tls_connection *conn, 2461 const struct wpabuf *in_data, 2462 struct wpabuf **appl_data) 2463 { 2464 return openssl_connection_handshake(conn, in_data, appl_data, 1); 2465 } 2466 2467 2468 struct wpabuf * tls_connection_encrypt(void *tls_ctx, 2469 struct tls_connection *conn, 2470 const struct wpabuf *in_data) 2471 { 2472 int res; 2473 struct wpabuf *buf; 2474 2475 if (conn == NULL) 2476 return NULL; 2477 2478 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */ 2479 if ((res = BIO_reset(conn->ssl_in)) < 0 || 2480 (res = BIO_reset(conn->ssl_out)) < 0) { 2481 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 2482 return NULL; 2483 } 2484 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data)); 2485 if (res < 0) { 2486 tls_show_errors(MSG_INFO, __func__, 2487 "Encryption failed - SSL_write"); 2488 return NULL; 2489 } 2490 2491 /* Read encrypted data to be sent to the server */ 2492 buf = wpabuf_alloc(wpabuf_len(in_data) + 300); 2493 if (buf == NULL) 2494 return NULL; 2495 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf)); 2496 if (res < 0) { 2497 tls_show_errors(MSG_INFO, __func__, 2498 "Encryption failed - BIO_read"); 2499 wpabuf_free(buf); 2500 return NULL; 2501 } 2502 wpabuf_put(buf, res); 2503 2504 return buf; 2505 } 2506 2507 2508 struct wpabuf * tls_connection_decrypt(void *tls_ctx, 2509 struct tls_connection *conn, 2510 const struct wpabuf *in_data) 2511 { 2512 int res; 2513 struct wpabuf *buf; 2514 2515 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */ 2516 res = BIO_write(conn->ssl_in, wpabuf_head(in_data), 2517 wpabuf_len(in_data)); 2518 if (res < 0) { 2519 tls_show_errors(MSG_INFO, __func__, 2520 "Decryption failed - BIO_write"); 2521 return NULL; 2522 } 2523 if (BIO_reset(conn->ssl_out) < 0) { 2524 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 2525 return NULL; 2526 } 2527 2528 /* Read decrypted data for further processing */ 2529 /* 2530 * Even though we try to disable TLS compression, it is possible that 2531 * this cannot be done with all TLS libraries. Add extra buffer space 2532 * to handle the possibility of the decrypted data being longer than 2533 * input data. 2534 */ 2535 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); 2536 if (buf == NULL) 2537 return NULL; 2538 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf)); 2539 if (res < 0) { 2540 tls_show_errors(MSG_INFO, __func__, 2541 "Decryption failed - SSL_read"); 2542 wpabuf_free(buf); 2543 return NULL; 2544 } 2545 wpabuf_put(buf, res); 2546 2547 return buf; 2548 } 2549 2550 2551 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) 2552 { 2553 return conn ? conn->ssl->hit : 0; 2554 } 2555 2556 2557 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, 2558 u8 *ciphers) 2559 { 2560 char buf[100], *pos, *end; 2561 u8 *c; 2562 int ret; 2563 2564 if (conn == NULL || conn->ssl == NULL || ciphers == NULL) 2565 return -1; 2566 2567 buf[0] = '\0'; 2568 pos = buf; 2569 end = pos + sizeof(buf); 2570 2571 c = ciphers; 2572 while (*c != TLS_CIPHER_NONE) { 2573 const char *suite; 2574 2575 switch (*c) { 2576 case TLS_CIPHER_RC4_SHA: 2577 suite = "RC4-SHA"; 2578 break; 2579 case TLS_CIPHER_AES128_SHA: 2580 suite = "AES128-SHA"; 2581 break; 2582 case TLS_CIPHER_RSA_DHE_AES128_SHA: 2583 suite = "DHE-RSA-AES128-SHA"; 2584 break; 2585 case TLS_CIPHER_ANON_DH_AES128_SHA: 2586 suite = "ADH-AES128-SHA"; 2587 break; 2588 default: 2589 wpa_printf(MSG_DEBUG, "TLS: Unsupported " 2590 "cipher selection: %d", *c); 2591 return -1; 2592 } 2593 ret = os_snprintf(pos, end - pos, ":%s", suite); 2594 if (ret < 0 || ret >= end - pos) 2595 break; 2596 pos += ret; 2597 2598 c++; 2599 } 2600 2601 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1); 2602 2603 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) { 2604 tls_show_errors(MSG_INFO, __func__, 2605 "Cipher suite configuration failed"); 2606 return -1; 2607 } 2608 2609 return 0; 2610 } 2611 2612 2613 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, 2614 char *buf, size_t buflen) 2615 { 2616 const char *name; 2617 if (conn == NULL || conn->ssl == NULL) 2618 return -1; 2619 2620 name = SSL_get_cipher(conn->ssl); 2621 if (name == NULL) 2622 return -1; 2623 2624 os_strlcpy(buf, name, buflen); 2625 return 0; 2626 } 2627 2628 2629 int tls_connection_enable_workaround(void *ssl_ctx, 2630 struct tls_connection *conn) 2631 { 2632 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); 2633 2634 return 0; 2635 } 2636 2637 2638 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2639 /* ClientHello TLS extensions require a patch to openssl, so this function is 2640 * commented out unless explicitly needed for EAP-FAST in order to be able to 2641 * build this file with unmodified openssl. */ 2642 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, 2643 int ext_type, const u8 *data, 2644 size_t data_len) 2645 { 2646 if (conn == NULL || conn->ssl == NULL || ext_type != 35) 2647 return -1; 2648 2649 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2650 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data, 2651 data_len) != 1) 2652 return -1; 2653 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2654 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data, 2655 data_len) != 1) 2656 return -1; 2657 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2658 2659 return 0; 2660 } 2661 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2662 2663 2664 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) 2665 { 2666 if (conn == NULL) 2667 return -1; 2668 return conn->failed; 2669 } 2670 2671 2672 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) 2673 { 2674 if (conn == NULL) 2675 return -1; 2676 return conn->read_alerts; 2677 } 2678 2679 2680 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) 2681 { 2682 if (conn == NULL) 2683 return -1; 2684 return conn->write_alerts; 2685 } 2686 2687 2688 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 2689 const struct tls_connection_params *params) 2690 { 2691 int ret; 2692 unsigned long err; 2693 2694 if (conn == NULL) 2695 return -1; 2696 2697 while ((err = ERR_get_error())) { 2698 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 2699 __func__, ERR_error_string(err, NULL)); 2700 } 2701 2702 if (params->engine) { 2703 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine"); 2704 ret = tls_engine_init(conn, params->engine_id, params->pin, 2705 params->key_id, params->cert_id, 2706 params->ca_cert_id); 2707 if (ret) 2708 return ret; 2709 } 2710 if (tls_connection_set_subject_match(conn, 2711 params->subject_match, 2712 params->altsubject_match)) 2713 return -1; 2714 2715 if (params->engine && params->ca_cert_id) { 2716 if (tls_connection_engine_ca_cert(tls_ctx, conn, 2717 params->ca_cert_id)) 2718 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2719 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert, 2720 params->ca_cert_blob, 2721 params->ca_cert_blob_len, 2722 params->ca_path)) 2723 return -1; 2724 2725 if (params->engine && params->cert_id) { 2726 if (tls_connection_engine_client_cert(conn, params->cert_id)) 2727 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2728 } else if (tls_connection_client_cert(conn, params->client_cert, 2729 params->client_cert_blob, 2730 params->client_cert_blob_len)) 2731 return -1; 2732 2733 if (params->engine && params->key_id) { 2734 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine"); 2735 if (tls_connection_engine_private_key(conn)) 2736 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2737 } else if (tls_connection_private_key(tls_ctx, conn, 2738 params->private_key, 2739 params->private_key_passwd, 2740 params->private_key_blob, 2741 params->private_key_blob_len)) { 2742 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'", 2743 params->private_key); 2744 return -1; 2745 } 2746 2747 if (tls_connection_dh(conn, params->dh_file)) { 2748 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 2749 params->dh_file); 2750 return -1; 2751 } 2752 2753 conn->flags = params->flags; 2754 2755 tls_get_errors(tls_ctx); 2756 2757 return 0; 2758 } 2759 2760 2761 int tls_global_set_params(void *tls_ctx, 2762 const struct tls_connection_params *params) 2763 { 2764 SSL_CTX *ssl_ctx = tls_ctx; 2765 unsigned long err; 2766 2767 while ((err = ERR_get_error())) { 2768 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 2769 __func__, ERR_error_string(err, NULL)); 2770 } 2771 2772 if (tls_global_ca_cert(ssl_ctx, params->ca_cert)) 2773 return -1; 2774 2775 if (tls_global_client_cert(ssl_ctx, params->client_cert)) 2776 return -1; 2777 2778 if (tls_global_private_key(ssl_ctx, params->private_key, 2779 params->private_key_passwd)) 2780 return -1; 2781 2782 if (tls_global_dh(ssl_ctx, params->dh_file)) { 2783 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 2784 params->dh_file); 2785 return -1; 2786 } 2787 2788 return 0; 2789 } 2790 2791 2792 int tls_connection_get_keyblock_size(void *tls_ctx, 2793 struct tls_connection *conn) 2794 { 2795 const EVP_CIPHER *c; 2796 const EVP_MD *h; 2797 2798 if (conn == NULL || conn->ssl == NULL || 2799 conn->ssl->enc_read_ctx == NULL || 2800 conn->ssl->enc_read_ctx->cipher == NULL || 2801 conn->ssl->read_hash == NULL) 2802 return -1; 2803 2804 c = conn->ssl->enc_read_ctx->cipher; 2805 #if OPENSSL_VERSION_NUMBER >= 0x00909000L 2806 h = EVP_MD_CTX_md(conn->ssl->read_hash); 2807 #else 2808 h = conn->ssl->read_hash; 2809 #endif 2810 2811 return 2 * (EVP_CIPHER_key_length(c) + 2812 EVP_MD_size(h) + 2813 EVP_CIPHER_iv_length(c)); 2814 } 2815 2816 2817 unsigned int tls_capabilities(void *tls_ctx) 2818 { 2819 return 0; 2820 } 2821 2822 2823 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2824 /* Pre-shared secred requires a patch to openssl, so this function is 2825 * commented out unless explicitly needed for EAP-FAST in order to be able to 2826 * build this file with unmodified openssl. */ 2827 2828 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, 2829 STACK_OF(SSL_CIPHER) *peer_ciphers, 2830 SSL_CIPHER **cipher, void *arg) 2831 { 2832 struct tls_connection *conn = arg; 2833 int ret; 2834 2835 if (conn == NULL || conn->session_ticket_cb == NULL) 2836 return 0; 2837 2838 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, 2839 conn->session_ticket, 2840 conn->session_ticket_len, 2841 s->s3->client_random, 2842 s->s3->server_random, secret); 2843 os_free(conn->session_ticket); 2844 conn->session_ticket = NULL; 2845 2846 if (ret <= 0) 2847 return 0; 2848 2849 *secret_len = SSL_MAX_MASTER_KEY_LENGTH; 2850 return 1; 2851 } 2852 2853 2854 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2855 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data, 2856 int len, void *arg) 2857 { 2858 struct tls_connection *conn = arg; 2859 2860 if (conn == NULL || conn->session_ticket_cb == NULL) 2861 return 0; 2862 2863 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len); 2864 2865 os_free(conn->session_ticket); 2866 conn->session_ticket = NULL; 2867 2868 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2869 "extension", data, len); 2870 2871 conn->session_ticket = os_malloc(len); 2872 if (conn->session_ticket == NULL) 2873 return 0; 2874 2875 os_memcpy(conn->session_ticket, data, len); 2876 conn->session_ticket_len = len; 2877 2878 return 1; 2879 } 2880 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2881 #ifdef SSL_OP_NO_TICKET 2882 static void tls_hello_ext_cb(SSL *s, int client_server, int type, 2883 unsigned char *data, int len, void *arg) 2884 { 2885 struct tls_connection *conn = arg; 2886 2887 if (conn == NULL || conn->session_ticket_cb == NULL) 2888 return; 2889 2890 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, 2891 type, len); 2892 2893 if (type == TLSEXT_TYPE_session_ticket && !client_server) { 2894 os_free(conn->session_ticket); 2895 conn->session_ticket = NULL; 2896 2897 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2898 "extension", data, len); 2899 conn->session_ticket = os_malloc(len); 2900 if (conn->session_ticket == NULL) 2901 return; 2902 2903 os_memcpy(conn->session_ticket, data, len); 2904 conn->session_ticket_len = len; 2905 } 2906 } 2907 #else /* SSL_OP_NO_TICKET */ 2908 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg) 2909 { 2910 struct tls_connection *conn = arg; 2911 2912 if (conn == NULL || conn->session_ticket_cb == NULL) 2913 return 0; 2914 2915 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, 2916 ext->type, ext->length); 2917 2918 os_free(conn->session_ticket); 2919 conn->session_ticket = NULL; 2920 2921 if (ext->type == 35) { 2922 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2923 "extension", ext->data, ext->length); 2924 conn->session_ticket = os_malloc(ext->length); 2925 if (conn->session_ticket == NULL) 2926 return SSL_AD_INTERNAL_ERROR; 2927 2928 os_memcpy(conn->session_ticket, ext->data, ext->length); 2929 conn->session_ticket_len = ext->length; 2930 } 2931 2932 return 0; 2933 } 2934 #endif /* SSL_OP_NO_TICKET */ 2935 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2936 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2937 2938 2939 int tls_connection_set_session_ticket_cb(void *tls_ctx, 2940 struct tls_connection *conn, 2941 tls_session_ticket_cb cb, 2942 void *ctx) 2943 { 2944 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2945 conn->session_ticket_cb = cb; 2946 conn->session_ticket_cb_ctx = ctx; 2947 2948 if (cb) { 2949 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb, 2950 conn) != 1) 2951 return -1; 2952 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2953 SSL_set_session_ticket_ext_cb(conn->ssl, 2954 tls_session_ticket_ext_cb, conn); 2955 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2956 #ifdef SSL_OP_NO_TICKET 2957 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb); 2958 SSL_set_tlsext_debug_arg(conn->ssl, conn); 2959 #else /* SSL_OP_NO_TICKET */ 2960 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb, 2961 conn) != 1) 2962 return -1; 2963 #endif /* SSL_OP_NO_TICKET */ 2964 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2965 } else { 2966 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1) 2967 return -1; 2968 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2969 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL); 2970 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2971 #ifdef SSL_OP_NO_TICKET 2972 SSL_set_tlsext_debug_callback(conn->ssl, NULL); 2973 SSL_set_tlsext_debug_arg(conn->ssl, conn); 2974 #else /* SSL_OP_NO_TICKET */ 2975 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1) 2976 return -1; 2977 #endif /* SSL_OP_NO_TICKET */ 2978 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2979 } 2980 2981 return 0; 2982 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2983 return -1; 2984 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2985 } 2986
