1 /* 2 * SSL/TLS interface functions for OpenSSL 3 * Copyright (c) 2004-2015, Jouni Malinen <j@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/opensslv.h> 22 #include <openssl/pkcs12.h> 23 #include <openssl/x509v3.h> 24 #ifndef OPENSSL_NO_ENGINE 25 #include <openssl/engine.h> 26 #endif /* OPENSSL_NO_ENGINE */ 27 #ifndef OPENSSL_NO_DSA 28 #include <openssl/dsa.h> 29 #endif 30 #ifndef OPENSSL_NO_DH 31 #include <openssl/dh.h> 32 #endif 33 34 #include "common.h" 35 #include "crypto.h" 36 #include "sha1.h" 37 #include "sha256.h" 38 #include "tls.h" 39 #include "tls_openssl.h" 40 41 #if !defined(CONFIG_FIPS) && \ 42 (defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || \ 43 defined(EAP_SERVER_FAST)) 44 #define OPENSSL_NEED_EAP_FAST_PRF 45 #endif 46 47 #if defined(OPENSSL_IS_BORINGSSL) 48 /* stack_index_t is the return type of OpenSSL's sk_XXX_num() functions. */ 49 typedef size_t stack_index_t; 50 #else 51 typedef int stack_index_t; 52 #endif 53 54 #ifdef SSL_set_tlsext_status_type 55 #ifndef OPENSSL_NO_TLSEXT 56 #define HAVE_OCSP 57 #include <openssl/ocsp.h> 58 #endif /* OPENSSL_NO_TLSEXT */ 59 #endif /* SSL_set_tlsext_status_type */ 60 61 #if (OPENSSL_VERSION_NUMBER < 0x10100000L || \ 62 defined(LIBRESSL_VERSION_NUMBER)) && \ 63 !defined(BORINGSSL_API_VERSION) 64 /* 65 * SSL_get_client_random() and SSL_get_server_random() were added in OpenSSL 66 * 1.1.0 and newer BoringSSL revisions. Provide compatibility wrappers for 67 * older versions. 68 */ 69 70 static size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, 71 size_t outlen) 72 { 73 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE) 74 return 0; 75 os_memcpy(out, ssl->s3->client_random, SSL3_RANDOM_SIZE); 76 return SSL3_RANDOM_SIZE; 77 } 78 79 80 static size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, 81 size_t outlen) 82 { 83 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE) 84 return 0; 85 os_memcpy(out, ssl->s3->server_random, SSL3_RANDOM_SIZE); 86 return SSL3_RANDOM_SIZE; 87 } 88 89 90 #ifdef OPENSSL_NEED_EAP_FAST_PRF 91 static size_t SSL_SESSION_get_master_key(const SSL_SESSION *session, 92 unsigned char *out, size_t outlen) 93 { 94 if (!session || session->master_key_length < 0 || 95 (size_t) session->master_key_length > outlen) 96 return 0; 97 if ((size_t) session->master_key_length < outlen) 98 outlen = session->master_key_length; 99 os_memcpy(out, session->master_key, outlen); 100 return outlen; 101 } 102 #endif /* OPENSSL_NEED_EAP_FAST_PRF */ 103 104 #endif 105 106 #ifdef ANDROID 107 #include <openssl/pem.h> 108 #include <keystore/keystore_get.h> 109 110 static BIO * BIO_from_keystore(const char *key) 111 { 112 BIO *bio = NULL; 113 uint8_t *value = NULL; 114 int length = keystore_get(key, strlen(key), &value); 115 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL) 116 BIO_write(bio, value, length); 117 free(value); 118 return bio; 119 } 120 121 122 static int tls_add_ca_from_keystore(X509_STORE *ctx, const char *key_alias) 123 { 124 BIO *bio = BIO_from_keystore(key_alias); 125 STACK_OF(X509_INFO) *stack = NULL; 126 stack_index_t i; 127 128 if (bio) { 129 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL); 130 BIO_free(bio); 131 } 132 133 if (!stack) { 134 wpa_printf(MSG_WARNING, "TLS: Failed to parse certificate: %s", 135 key_alias); 136 return -1; 137 } 138 139 for (i = 0; i < sk_X509_INFO_num(stack); ++i) { 140 X509_INFO *info = sk_X509_INFO_value(stack, i); 141 142 if (info->x509) 143 X509_STORE_add_cert(ctx, info->x509); 144 if (info->crl) 145 X509_STORE_add_crl(ctx, info->crl); 146 } 147 148 sk_X509_INFO_pop_free(stack, X509_INFO_free); 149 150 return 0; 151 } 152 153 154 static int tls_add_ca_from_keystore_encoded(X509_STORE *ctx, 155 const char *encoded_key_alias) 156 { 157 int rc = -1; 158 int len = os_strlen(encoded_key_alias); 159 unsigned char *decoded_alias; 160 161 if (len & 1) { 162 wpa_printf(MSG_WARNING, "Invalid hex-encoded alias: %s", 163 encoded_key_alias); 164 return rc; 165 } 166 167 decoded_alias = os_malloc(len / 2 + 1); 168 if (decoded_alias) { 169 if (!hexstr2bin(encoded_key_alias, decoded_alias, len / 2)) { 170 decoded_alias[len / 2] = '\0'; 171 rc = tls_add_ca_from_keystore( 172 ctx, (const char *) decoded_alias); 173 } 174 os_free(decoded_alias); 175 } 176 177 return rc; 178 } 179 180 #endif /* ANDROID */ 181 182 static int tls_openssl_ref_count = 0; 183 static int tls_ex_idx_session = -1; 184 185 struct tls_context { 186 void (*event_cb)(void *ctx, enum tls_event ev, 187 union tls_event_data *data); 188 void *cb_ctx; 189 int cert_in_cb; 190 char *ocsp_stapling_response; 191 }; 192 193 static struct tls_context *tls_global = NULL; 194 195 196 struct tls_data { 197 SSL_CTX *ssl; 198 unsigned int tls_session_lifetime; 199 }; 200 201 struct tls_connection { 202 struct tls_context *context; 203 SSL_CTX *ssl_ctx; 204 SSL *ssl; 205 BIO *ssl_in, *ssl_out; 206 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE) 207 ENGINE *engine; /* functional reference to the engine */ 208 EVP_PKEY *private_key; /* the private key if using engine */ 209 #endif /* OPENSSL_NO_ENGINE */ 210 char *subject_match, *altsubject_match, *suffix_match, *domain_match; 211 int read_alerts, write_alerts, failed; 212 213 tls_session_ticket_cb session_ticket_cb; 214 void *session_ticket_cb_ctx; 215 216 /* SessionTicket received from OpenSSL hello_extension_cb (server) */ 217 u8 *session_ticket; 218 size_t session_ticket_len; 219 220 unsigned int ca_cert_verify:1; 221 unsigned int cert_probe:1; 222 unsigned int server_cert_only:1; 223 unsigned int invalid_hb_used:1; 224 unsigned int success_data:1; 225 226 u8 srv_cert_hash[32]; 227 228 unsigned int flags; 229 230 X509 *peer_cert; 231 X509 *peer_issuer; 232 X509 *peer_issuer_issuer; 233 234 unsigned char client_random[SSL3_RANDOM_SIZE]; 235 unsigned char server_random[SSL3_RANDOM_SIZE]; 236 }; 237 238 239 static struct tls_context * tls_context_new(const struct tls_config *conf) 240 { 241 struct tls_context *context = os_zalloc(sizeof(*context)); 242 if (context == NULL) 243 return NULL; 244 if (conf) { 245 context->event_cb = conf->event_cb; 246 context->cb_ctx = conf->cb_ctx; 247 context->cert_in_cb = conf->cert_in_cb; 248 } 249 return context; 250 } 251 252 253 #ifdef CONFIG_NO_STDOUT_DEBUG 254 255 static void _tls_show_errors(void) 256 { 257 unsigned long err; 258 259 while ((err = ERR_get_error())) { 260 /* Just ignore the errors, since stdout is disabled */ 261 } 262 } 263 #define tls_show_errors(l, f, t) _tls_show_errors() 264 265 #else /* CONFIG_NO_STDOUT_DEBUG */ 266 267 static void tls_show_errors(int level, const char *func, const char *txt) 268 { 269 unsigned long err; 270 271 wpa_printf(level, "OpenSSL: %s - %s %s", 272 func, txt, ERR_error_string(ERR_get_error(), NULL)); 273 274 while ((err = ERR_get_error())) { 275 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s", 276 ERR_error_string(err, NULL)); 277 } 278 } 279 280 #endif /* CONFIG_NO_STDOUT_DEBUG */ 281 282 283 #ifdef CONFIG_NATIVE_WINDOWS 284 285 /* Windows CryptoAPI and access to certificate stores */ 286 #include <wincrypt.h> 287 288 #ifdef __MINGW32_VERSION 289 /* 290 * MinGW does not yet include all the needed definitions for CryptoAPI, so 291 * define here whatever extra is needed. 292 */ 293 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16) 294 #define CERT_STORE_READONLY_FLAG 0x00008000 295 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000 296 297 #endif /* __MINGW32_VERSION */ 298 299 300 struct cryptoapi_rsa_data { 301 const CERT_CONTEXT *cert; 302 HCRYPTPROV crypt_prov; 303 DWORD key_spec; 304 BOOL free_crypt_prov; 305 }; 306 307 308 static void cryptoapi_error(const char *msg) 309 { 310 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u", 311 msg, (unsigned int) GetLastError()); 312 } 313 314 315 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from, 316 unsigned char *to, RSA *rsa, int padding) 317 { 318 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 319 return 0; 320 } 321 322 323 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from, 324 unsigned char *to, RSA *rsa, int padding) 325 { 326 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 327 return 0; 328 } 329 330 331 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from, 332 unsigned char *to, RSA *rsa, int padding) 333 { 334 struct cryptoapi_rsa_data *priv = 335 (struct cryptoapi_rsa_data *) rsa->meth->app_data; 336 HCRYPTHASH hash; 337 DWORD hash_size, len, i; 338 unsigned char *buf = NULL; 339 int ret = 0; 340 341 if (priv == NULL) { 342 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 343 ERR_R_PASSED_NULL_PARAMETER); 344 return 0; 345 } 346 347 if (padding != RSA_PKCS1_PADDING) { 348 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 349 RSA_R_UNKNOWN_PADDING_TYPE); 350 return 0; 351 } 352 353 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) { 354 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported", 355 __func__); 356 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 357 RSA_R_INVALID_MESSAGE_LENGTH); 358 return 0; 359 } 360 361 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash)) 362 { 363 cryptoapi_error("CryptCreateHash failed"); 364 return 0; 365 } 366 367 len = sizeof(hash_size); 368 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len, 369 0)) { 370 cryptoapi_error("CryptGetHashParam failed"); 371 goto err; 372 } 373 374 if ((int) hash_size != flen) { 375 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)", 376 (unsigned) hash_size, flen); 377 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 378 RSA_R_INVALID_MESSAGE_LENGTH); 379 goto err; 380 } 381 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) { 382 cryptoapi_error("CryptSetHashParam failed"); 383 goto err; 384 } 385 386 len = RSA_size(rsa); 387 buf = os_malloc(len); 388 if (buf == NULL) { 389 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE); 390 goto err; 391 } 392 393 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) { 394 cryptoapi_error("CryptSignHash failed"); 395 goto err; 396 } 397 398 for (i = 0; i < len; i++) 399 to[i] = buf[len - i - 1]; 400 ret = len; 401 402 err: 403 os_free(buf); 404 CryptDestroyHash(hash); 405 406 return ret; 407 } 408 409 410 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from, 411 unsigned char *to, RSA *rsa, int padding) 412 { 413 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 414 return 0; 415 } 416 417 418 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv) 419 { 420 if (priv == NULL) 421 return; 422 if (priv->crypt_prov && priv->free_crypt_prov) 423 CryptReleaseContext(priv->crypt_prov, 0); 424 if (priv->cert) 425 CertFreeCertificateContext(priv->cert); 426 os_free(priv); 427 } 428 429 430 static int cryptoapi_finish(RSA *rsa) 431 { 432 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data); 433 os_free((void *) rsa->meth); 434 rsa->meth = NULL; 435 return 1; 436 } 437 438 439 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store) 440 { 441 HCERTSTORE cs; 442 const CERT_CONTEXT *ret = NULL; 443 444 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0, 445 store | CERT_STORE_OPEN_EXISTING_FLAG | 446 CERT_STORE_READONLY_FLAG, L"MY"); 447 if (cs == NULL) { 448 cryptoapi_error("Failed to open 'My system store'"); 449 return NULL; 450 } 451 452 if (strncmp(name, "cert://", 7) == 0) { 453 unsigned short wbuf[255]; 454 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255); 455 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING | 456 PKCS_7_ASN_ENCODING, 457 0, CERT_FIND_SUBJECT_STR, 458 wbuf, NULL); 459 } else if (strncmp(name, "hash://", 7) == 0) { 460 CRYPT_HASH_BLOB blob; 461 int len; 462 const char *hash = name + 7; 463 unsigned char *buf; 464 465 len = os_strlen(hash) / 2; 466 buf = os_malloc(len); 467 if (buf && hexstr2bin(hash, buf, len) == 0) { 468 blob.cbData = len; 469 blob.pbData = buf; 470 ret = CertFindCertificateInStore(cs, 471 X509_ASN_ENCODING | 472 PKCS_7_ASN_ENCODING, 473 0, CERT_FIND_HASH, 474 &blob, NULL); 475 } 476 os_free(buf); 477 } 478 479 CertCloseStore(cs, 0); 480 481 return ret; 482 } 483 484 485 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 486 { 487 X509 *cert = NULL; 488 RSA *rsa = NULL, *pub_rsa; 489 struct cryptoapi_rsa_data *priv; 490 RSA_METHOD *rsa_meth; 491 492 if (name == NULL || 493 (strncmp(name, "cert://", 7) != 0 && 494 strncmp(name, "hash://", 7) != 0)) 495 return -1; 496 497 priv = os_zalloc(sizeof(*priv)); 498 rsa_meth = os_zalloc(sizeof(*rsa_meth)); 499 if (priv == NULL || rsa_meth == NULL) { 500 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory " 501 "for CryptoAPI RSA method"); 502 os_free(priv); 503 os_free(rsa_meth); 504 return -1; 505 } 506 507 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER); 508 if (priv->cert == NULL) { 509 priv->cert = cryptoapi_find_cert( 510 name, CERT_SYSTEM_STORE_LOCAL_MACHINE); 511 } 512 if (priv->cert == NULL) { 513 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate " 514 "'%s'", name); 515 goto err; 516 } 517 518 cert = d2i_X509(NULL, 519 (const unsigned char **) &priv->cert->pbCertEncoded, 520 priv->cert->cbCertEncoded); 521 if (cert == NULL) { 522 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER " 523 "encoding"); 524 goto err; 525 } 526 527 if (!CryptAcquireCertificatePrivateKey(priv->cert, 528 CRYPT_ACQUIRE_COMPARE_KEY_FLAG, 529 NULL, &priv->crypt_prov, 530 &priv->key_spec, 531 &priv->free_crypt_prov)) { 532 cryptoapi_error("Failed to acquire a private key for the " 533 "certificate"); 534 goto err; 535 } 536 537 rsa_meth->name = "Microsoft CryptoAPI RSA Method"; 538 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc; 539 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec; 540 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc; 541 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec; 542 rsa_meth->finish = cryptoapi_finish; 543 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK; 544 rsa_meth->app_data = (char *) priv; 545 546 rsa = RSA_new(); 547 if (rsa == NULL) { 548 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, 549 ERR_R_MALLOC_FAILURE); 550 goto err; 551 } 552 553 if (!SSL_use_certificate(ssl, cert)) { 554 RSA_free(rsa); 555 rsa = NULL; 556 goto err; 557 } 558 pub_rsa = cert->cert_info->key->pkey->pkey.rsa; 559 X509_free(cert); 560 cert = NULL; 561 562 rsa->n = BN_dup(pub_rsa->n); 563 rsa->e = BN_dup(pub_rsa->e); 564 if (!RSA_set_method(rsa, rsa_meth)) 565 goto err; 566 567 if (!SSL_use_RSAPrivateKey(ssl, rsa)) 568 goto err; 569 RSA_free(rsa); 570 571 return 0; 572 573 err: 574 if (cert) 575 X509_free(cert); 576 if (rsa) 577 RSA_free(rsa); 578 else { 579 os_free(rsa_meth); 580 cryptoapi_free_data(priv); 581 } 582 return -1; 583 } 584 585 586 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name) 587 { 588 HCERTSTORE cs; 589 PCCERT_CONTEXT ctx = NULL; 590 X509 *cert; 591 char buf[128]; 592 const char *store; 593 #ifdef UNICODE 594 WCHAR *wstore; 595 #endif /* UNICODE */ 596 597 if (name == NULL || strncmp(name, "cert_store://", 13) != 0) 598 return -1; 599 600 store = name + 13; 601 #ifdef UNICODE 602 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR)); 603 if (wstore == NULL) 604 return -1; 605 wsprintf(wstore, L"%S", store); 606 cs = CertOpenSystemStore(0, wstore); 607 os_free(wstore); 608 #else /* UNICODE */ 609 cs = CertOpenSystemStore(0, store); 610 #endif /* UNICODE */ 611 if (cs == NULL) { 612 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store " 613 "'%s': error=%d", __func__, store, 614 (int) GetLastError()); 615 return -1; 616 } 617 618 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) { 619 cert = d2i_X509(NULL, 620 (const unsigned char **) &ctx->pbCertEncoded, 621 ctx->cbCertEncoded); 622 if (cert == NULL) { 623 wpa_printf(MSG_INFO, "CryptoAPI: Could not process " 624 "X509 DER encoding for CA cert"); 625 continue; 626 } 627 628 X509_NAME_oneline(X509_get_subject_name(cert), buf, 629 sizeof(buf)); 630 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for " 631 "system certificate store: subject='%s'", buf); 632 633 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx), 634 cert)) { 635 tls_show_errors(MSG_WARNING, __func__, 636 "Failed to add ca_cert to OpenSSL " 637 "certificate store"); 638 } 639 640 X509_free(cert); 641 } 642 643 if (!CertCloseStore(cs, 0)) { 644 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store " 645 "'%s': error=%d", __func__, name + 13, 646 (int) GetLastError()); 647 } 648 649 return 0; 650 } 651 652 653 #else /* CONFIG_NATIVE_WINDOWS */ 654 655 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 656 { 657 return -1; 658 } 659 660 #endif /* CONFIG_NATIVE_WINDOWS */ 661 662 663 static void ssl_info_cb(const SSL *ssl, int where, int ret) 664 { 665 const char *str; 666 int w; 667 668 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret); 669 w = where & ~SSL_ST_MASK; 670 if (w & SSL_ST_CONNECT) 671 str = "SSL_connect"; 672 else if (w & SSL_ST_ACCEPT) 673 str = "SSL_accept"; 674 else 675 str = "undefined"; 676 677 if (where & SSL_CB_LOOP) { 678 wpa_printf(MSG_DEBUG, "SSL: %s:%s", 679 str, SSL_state_string_long(ssl)); 680 } else if (where & SSL_CB_ALERT) { 681 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl); 682 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", 683 where & SSL_CB_READ ? 684 "read (remote end reported an error)" : 685 "write (local SSL3 detected an error)", 686 SSL_alert_type_string_long(ret), 687 SSL_alert_desc_string_long(ret)); 688 if ((ret >> 8) == SSL3_AL_FATAL) { 689 if (where & SSL_CB_READ) 690 conn->read_alerts++; 691 else 692 conn->write_alerts++; 693 } 694 if (conn->context->event_cb != NULL) { 695 union tls_event_data ev; 696 struct tls_context *context = conn->context; 697 os_memset(&ev, 0, sizeof(ev)); 698 ev.alert.is_local = !(where & SSL_CB_READ); 699 ev.alert.type = SSL_alert_type_string_long(ret); 700 ev.alert.description = SSL_alert_desc_string_long(ret); 701 context->event_cb(context->cb_ctx, TLS_ALERT, &ev); 702 } 703 } else if (where & SSL_CB_EXIT && ret <= 0) { 704 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", 705 str, ret == 0 ? "failed" : "error", 706 SSL_state_string_long(ssl)); 707 } 708 } 709 710 711 #ifndef OPENSSL_NO_ENGINE 712 /** 713 * tls_engine_load_dynamic_generic - load any openssl engine 714 * @pre: an array of commands and values that load an engine initialized 715 * in the engine specific function 716 * @post: an array of commands and values that initialize an already loaded 717 * engine (or %NULL if not required) 718 * @id: the engine id of the engine to load (only required if post is not %NULL 719 * 720 * This function is a generic function that loads any openssl engine. 721 * 722 * Returns: 0 on success, -1 on failure 723 */ 724 static int tls_engine_load_dynamic_generic(const char *pre[], 725 const char *post[], const char *id) 726 { 727 ENGINE *engine; 728 const char *dynamic_id = "dynamic"; 729 730 engine = ENGINE_by_id(id); 731 if (engine) { 732 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already " 733 "available", id); 734 /* 735 * If it was auto-loaded by ENGINE_by_id() we might still 736 * need to tell it which PKCS#11 module to use in legacy 737 * (non-p11-kit) environments. Do so now; even if it was 738 * properly initialised before, setting it again will be 739 * harmless. 740 */ 741 goto found; 742 } 743 ERR_clear_error(); 744 745 engine = ENGINE_by_id(dynamic_id); 746 if (engine == NULL) { 747 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 748 dynamic_id, 749 ERR_error_string(ERR_get_error(), NULL)); 750 return -1; 751 } 752 753 /* Perform the pre commands. This will load the engine. */ 754 while (pre && pre[0]) { 755 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]); 756 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) { 757 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: " 758 "%s %s [%s]", pre[0], pre[1], 759 ERR_error_string(ERR_get_error(), NULL)); 760 ENGINE_free(engine); 761 return -1; 762 } 763 pre += 2; 764 } 765 766 /* 767 * Free the reference to the "dynamic" engine. The loaded engine can 768 * now be looked up using ENGINE_by_id(). 769 */ 770 ENGINE_free(engine); 771 772 engine = ENGINE_by_id(id); 773 if (engine == NULL) { 774 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 775 id, ERR_error_string(ERR_get_error(), NULL)); 776 return -1; 777 } 778 found: 779 while (post && post[0]) { 780 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]); 781 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) { 782 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:" 783 " %s %s [%s]", post[0], post[1], 784 ERR_error_string(ERR_get_error(), NULL)); 785 ENGINE_remove(engine); 786 ENGINE_free(engine); 787 return -1; 788 } 789 post += 2; 790 } 791 ENGINE_free(engine); 792 793 return 0; 794 } 795 796 797 /** 798 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc 799 * @pkcs11_so_path: pksc11_so_path from the configuration 800 * @pcks11_module_path: pkcs11_module_path from the configuration 801 */ 802 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path, 803 const char *pkcs11_module_path) 804 { 805 char *engine_id = "pkcs11"; 806 const char *pre_cmd[] = { 807 "SO_PATH", NULL /* pkcs11_so_path */, 808 "ID", NULL /* engine_id */, 809 "LIST_ADD", "1", 810 /* "NO_VCHECK", "1", */ 811 "LOAD", NULL, 812 NULL, NULL 813 }; 814 const char *post_cmd[] = { 815 "MODULE_PATH", NULL /* pkcs11_module_path */, 816 NULL, NULL 817 }; 818 819 if (!pkcs11_so_path) 820 return 0; 821 822 pre_cmd[1] = pkcs11_so_path; 823 pre_cmd[3] = engine_id; 824 if (pkcs11_module_path) 825 post_cmd[1] = pkcs11_module_path; 826 else 827 post_cmd[0] = NULL; 828 829 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s", 830 pkcs11_so_path); 831 832 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id); 833 } 834 835 836 /** 837 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc 838 * @opensc_so_path: opensc_so_path from the configuration 839 */ 840 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path) 841 { 842 char *engine_id = "opensc"; 843 const char *pre_cmd[] = { 844 "SO_PATH", NULL /* opensc_so_path */, 845 "ID", NULL /* engine_id */, 846 "LIST_ADD", "1", 847 "LOAD", NULL, 848 NULL, NULL 849 }; 850 851 if (!opensc_so_path) 852 return 0; 853 854 pre_cmd[1] = opensc_so_path; 855 pre_cmd[3] = engine_id; 856 857 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s", 858 opensc_so_path); 859 860 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id); 861 } 862 #endif /* OPENSSL_NO_ENGINE */ 863 864 865 static void remove_session_cb(SSL_CTX *ctx, SSL_SESSION *sess) 866 { 867 struct wpabuf *buf; 868 869 if (tls_ex_idx_session < 0) 870 return; 871 buf = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session); 872 if (!buf) 873 return; 874 wpa_printf(MSG_DEBUG, 875 "OpenSSL: Free application session data %p (sess %p)", 876 buf, sess); 877 wpabuf_free(buf); 878 879 SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, NULL); 880 } 881 882 883 void * tls_init(const struct tls_config *conf) 884 { 885 struct tls_data *data; 886 SSL_CTX *ssl; 887 struct tls_context *context; 888 const char *ciphers; 889 890 if (tls_openssl_ref_count == 0) { 891 tls_global = context = tls_context_new(conf); 892 if (context == NULL) 893 return NULL; 894 #ifdef CONFIG_FIPS 895 #ifdef OPENSSL_FIPS 896 if (conf && conf->fips_mode) { 897 static int fips_enabled = 0; 898 899 if (!fips_enabled && !FIPS_mode_set(1)) { 900 wpa_printf(MSG_ERROR, "Failed to enable FIPS " 901 "mode"); 902 ERR_load_crypto_strings(); 903 ERR_print_errors_fp(stderr); 904 os_free(tls_global); 905 tls_global = NULL; 906 return NULL; 907 } else { 908 wpa_printf(MSG_INFO, "Running in FIPS mode"); 909 fips_enabled = 1; 910 } 911 } 912 #else /* OPENSSL_FIPS */ 913 if (conf && conf->fips_mode) { 914 wpa_printf(MSG_ERROR, "FIPS mode requested, but not " 915 "supported"); 916 os_free(tls_global); 917 tls_global = NULL; 918 return NULL; 919 } 920 #endif /* OPENSSL_FIPS */ 921 #endif /* CONFIG_FIPS */ 922 #if OPENSSL_VERSION_NUMBER < 0x10100000L 923 SSL_load_error_strings(); 924 SSL_library_init(); 925 #ifndef OPENSSL_NO_SHA256 926 EVP_add_digest(EVP_sha256()); 927 #endif /* OPENSSL_NO_SHA256 */ 928 /* TODO: if /dev/urandom is available, PRNG is seeded 929 * automatically. If this is not the case, random data should 930 * be added here. */ 931 932 #ifdef PKCS12_FUNCS 933 #ifndef OPENSSL_NO_RC2 934 /* 935 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it. 936 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8 937 * versions, but it looks like OpenSSL 1.0.0 does not do that 938 * anymore. 939 */ 940 EVP_add_cipher(EVP_rc2_40_cbc()); 941 #endif /* OPENSSL_NO_RC2 */ 942 PKCS12_PBE_add(); 943 #endif /* PKCS12_FUNCS */ 944 #endif /* < 1.1.0 */ 945 } else { 946 context = tls_context_new(conf); 947 if (context == NULL) 948 return NULL; 949 } 950 tls_openssl_ref_count++; 951 952 data = os_zalloc(sizeof(*data)); 953 if (data) 954 ssl = SSL_CTX_new(SSLv23_method()); 955 else 956 ssl = NULL; 957 if (ssl == NULL) { 958 tls_openssl_ref_count--; 959 if (context != tls_global) 960 os_free(context); 961 if (tls_openssl_ref_count == 0) { 962 os_free(tls_global); 963 tls_global = NULL; 964 } 965 os_free(data); 966 return NULL; 967 } 968 data->ssl = ssl; 969 if (conf) 970 data->tls_session_lifetime = conf->tls_session_lifetime; 971 972 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv2); 973 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv3); 974 975 SSL_CTX_set_info_callback(ssl, ssl_info_cb); 976 SSL_CTX_set_app_data(ssl, context); 977 if (data->tls_session_lifetime > 0) { 978 SSL_CTX_set_quiet_shutdown(ssl, 1); 979 /* 980 * Set default context here. In practice, this will be replaced 981 * by the per-EAP method context in tls_connection_set_verify(). 982 */ 983 SSL_CTX_set_session_id_context(ssl, (u8 *) "hostapd", 7); 984 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_SERVER); 985 SSL_CTX_set_timeout(ssl, data->tls_session_lifetime); 986 SSL_CTX_sess_set_remove_cb(ssl, remove_session_cb); 987 } else { 988 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_OFF); 989 } 990 991 if (tls_ex_idx_session < 0) { 992 tls_ex_idx_session = SSL_SESSION_get_ex_new_index( 993 0, NULL, NULL, NULL, NULL); 994 if (tls_ex_idx_session < 0) { 995 tls_deinit(data); 996 return NULL; 997 } 998 } 999 1000 #ifndef OPENSSL_NO_ENGINE 1001 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine"); 1002 ERR_load_ENGINE_strings(); 1003 ENGINE_load_dynamic(); 1004 1005 if (conf && 1006 (conf->opensc_engine_path || conf->pkcs11_engine_path || 1007 conf->pkcs11_module_path)) { 1008 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) || 1009 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path, 1010 conf->pkcs11_module_path)) { 1011 tls_deinit(data); 1012 return NULL; 1013 } 1014 } 1015 #endif /* OPENSSL_NO_ENGINE */ 1016 1017 if (conf && conf->openssl_ciphers) 1018 ciphers = conf->openssl_ciphers; 1019 else 1020 ciphers = "DEFAULT:!EXP:!LOW"; 1021 if (SSL_CTX_set_cipher_list(ssl, ciphers) != 1) { 1022 wpa_printf(MSG_ERROR, 1023 "OpenSSL: Failed to set cipher string '%s'", 1024 ciphers); 1025 tls_deinit(data); 1026 return NULL; 1027 } 1028 1029 return data; 1030 } 1031 1032 1033 void tls_deinit(void *ssl_ctx) 1034 { 1035 struct tls_data *data = ssl_ctx; 1036 SSL_CTX *ssl = data->ssl; 1037 struct tls_context *context = SSL_CTX_get_app_data(ssl); 1038 if (context != tls_global) 1039 os_free(context); 1040 if (data->tls_session_lifetime > 0) 1041 SSL_CTX_flush_sessions(ssl, 0); 1042 SSL_CTX_free(ssl); 1043 1044 tls_openssl_ref_count--; 1045 if (tls_openssl_ref_count == 0) { 1046 #if OPENSSL_VERSION_NUMBER < 0x10100000L 1047 #ifndef OPENSSL_NO_ENGINE 1048 ENGINE_cleanup(); 1049 #endif /* OPENSSL_NO_ENGINE */ 1050 CRYPTO_cleanup_all_ex_data(); 1051 ERR_remove_thread_state(NULL); 1052 ERR_free_strings(); 1053 EVP_cleanup(); 1054 #endif /* < 1.1.0 */ 1055 os_free(tls_global->ocsp_stapling_response); 1056 tls_global->ocsp_stapling_response = NULL; 1057 os_free(tls_global); 1058 tls_global = NULL; 1059 } 1060 1061 os_free(data); 1062 } 1063 1064 1065 #ifndef OPENSSL_NO_ENGINE 1066 1067 /* Cryptoki return values */ 1068 #define CKR_PIN_INCORRECT 0x000000a0 1069 #define CKR_PIN_INVALID 0x000000a1 1070 #define CKR_PIN_LEN_RANGE 0x000000a2 1071 1072 /* libp11 */ 1073 #define ERR_LIB_PKCS11 ERR_LIB_USER 1074 1075 static int tls_is_pin_error(unsigned int err) 1076 { 1077 return ERR_GET_LIB(err) == ERR_LIB_PKCS11 && 1078 (ERR_GET_REASON(err) == CKR_PIN_INCORRECT || 1079 ERR_GET_REASON(err) == CKR_PIN_INVALID || 1080 ERR_GET_REASON(err) == CKR_PIN_LEN_RANGE); 1081 } 1082 1083 #endif /* OPENSSL_NO_ENGINE */ 1084 1085 1086 #ifdef ANDROID 1087 /* EVP_PKEY_from_keystore comes from system/security/keystore-engine. */ 1088 EVP_PKEY * EVP_PKEY_from_keystore(const char *key_id); 1089 #endif /* ANDROID */ 1090 1091 static int tls_engine_init(struct tls_connection *conn, const char *engine_id, 1092 const char *pin, const char *key_id, 1093 const char *cert_id, const char *ca_cert_id) 1094 { 1095 #if defined(ANDROID) && defined(OPENSSL_IS_BORINGSSL) 1096 #if !defined(OPENSSL_NO_ENGINE) 1097 #error "This code depends on OPENSSL_NO_ENGINE being defined by BoringSSL." 1098 #endif 1099 if (!key_id) 1100 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1101 conn->engine = NULL; 1102 conn->private_key = EVP_PKEY_from_keystore(key_id); 1103 if (!conn->private_key) { 1104 wpa_printf(MSG_ERROR, 1105 "ENGINE: cannot load private key with id '%s' [%s]", 1106 key_id, 1107 ERR_error_string(ERR_get_error(), NULL)); 1108 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1109 } 1110 #endif /* ANDROID && OPENSSL_IS_BORINGSSL */ 1111 1112 #ifndef OPENSSL_NO_ENGINE 1113 int ret = -1; 1114 if (engine_id == NULL) { 1115 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set"); 1116 return -1; 1117 } 1118 1119 ERR_clear_error(); 1120 #ifdef ANDROID 1121 ENGINE_load_dynamic(); 1122 #endif 1123 conn->engine = ENGINE_by_id(engine_id); 1124 if (!conn->engine) { 1125 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]", 1126 engine_id, ERR_error_string(ERR_get_error(), NULL)); 1127 goto err; 1128 } 1129 if (ENGINE_init(conn->engine) != 1) { 1130 wpa_printf(MSG_ERROR, "ENGINE: engine init failed " 1131 "(engine: %s) [%s]", engine_id, 1132 ERR_error_string(ERR_get_error(), NULL)); 1133 goto err; 1134 } 1135 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized"); 1136 1137 #ifndef ANDROID 1138 if (pin && ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) { 1139 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]", 1140 ERR_error_string(ERR_get_error(), NULL)); 1141 goto err; 1142 } 1143 #endif 1144 if (key_id) { 1145 /* 1146 * Ensure that the ENGINE does not attempt to use the OpenSSL 1147 * UI system to obtain a PIN, if we didn't provide one. 1148 */ 1149 struct { 1150 const void *password; 1151 const char *prompt_info; 1152 } key_cb = { "", NULL }; 1153 1154 /* load private key first in-case PIN is required for cert */ 1155 conn->private_key = ENGINE_load_private_key(conn->engine, 1156 key_id, NULL, 1157 &key_cb); 1158 if (!conn->private_key) { 1159 unsigned long err = ERR_get_error(); 1160 1161 wpa_printf(MSG_ERROR, 1162 "ENGINE: cannot load private key with id '%s' [%s]", 1163 key_id, 1164 ERR_error_string(err, NULL)); 1165 if (tls_is_pin_error(err)) 1166 ret = TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN; 1167 else 1168 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1169 goto err; 1170 } 1171 } 1172 1173 /* handle a certificate and/or CA certificate */ 1174 if (cert_id || ca_cert_id) { 1175 const char *cmd_name = "LOAD_CERT_CTRL"; 1176 1177 /* test if the engine supports a LOAD_CERT_CTRL */ 1178 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME, 1179 0, (void *)cmd_name, NULL)) { 1180 wpa_printf(MSG_ERROR, "ENGINE: engine does not support" 1181 " loading certificates"); 1182 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1183 goto err; 1184 } 1185 } 1186 1187 return 0; 1188 1189 err: 1190 if (conn->engine) { 1191 ENGINE_free(conn->engine); 1192 conn->engine = NULL; 1193 } 1194 1195 if (conn->private_key) { 1196 EVP_PKEY_free(conn->private_key); 1197 conn->private_key = NULL; 1198 } 1199 1200 return ret; 1201 #else /* OPENSSL_NO_ENGINE */ 1202 return 0; 1203 #endif /* OPENSSL_NO_ENGINE */ 1204 } 1205 1206 1207 static void tls_engine_deinit(struct tls_connection *conn) 1208 { 1209 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE) 1210 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit"); 1211 if (conn->private_key) { 1212 EVP_PKEY_free(conn->private_key); 1213 conn->private_key = NULL; 1214 } 1215 if (conn->engine) { 1216 #if !defined(OPENSSL_IS_BORINGSSL) 1217 ENGINE_finish(conn->engine); 1218 #endif /* !OPENSSL_IS_BORINGSSL */ 1219 conn->engine = NULL; 1220 } 1221 #endif /* ANDROID || !OPENSSL_NO_ENGINE */ 1222 } 1223 1224 1225 int tls_get_errors(void *ssl_ctx) 1226 { 1227 int count = 0; 1228 unsigned long err; 1229 1230 while ((err = ERR_get_error())) { 1231 wpa_printf(MSG_INFO, "TLS - SSL error: %s", 1232 ERR_error_string(err, NULL)); 1233 count++; 1234 } 1235 1236 return count; 1237 } 1238 1239 1240 static const char * openssl_content_type(int content_type) 1241 { 1242 switch (content_type) { 1243 case 20: 1244 return "change cipher spec"; 1245 case 21: 1246 return "alert"; 1247 case 22: 1248 return "handshake"; 1249 case 23: 1250 return "application data"; 1251 case 24: 1252 return "heartbeat"; 1253 case 256: 1254 return "TLS header info"; /* pseudo content type */ 1255 default: 1256 return "?"; 1257 } 1258 } 1259 1260 1261 static const char * openssl_handshake_type(int content_type, const u8 *buf, 1262 size_t len) 1263 { 1264 if (content_type != 22 || !buf || len == 0) 1265 return ""; 1266 switch (buf[0]) { 1267 case 0: 1268 return "hello request"; 1269 case 1: 1270 return "client hello"; 1271 case 2: 1272 return "server hello"; 1273 case 4: 1274 return "new session ticket"; 1275 case 11: 1276 return "certificate"; 1277 case 12: 1278 return "server key exchange"; 1279 case 13: 1280 return "certificate request"; 1281 case 14: 1282 return "server hello done"; 1283 case 15: 1284 return "certificate verify"; 1285 case 16: 1286 return "client key exchange"; 1287 case 20: 1288 return "finished"; 1289 case 21: 1290 return "certificate url"; 1291 case 22: 1292 return "certificate status"; 1293 default: 1294 return "?"; 1295 } 1296 } 1297 1298 1299 static void tls_msg_cb(int write_p, int version, int content_type, 1300 const void *buf, size_t len, SSL *ssl, void *arg) 1301 { 1302 struct tls_connection *conn = arg; 1303 const u8 *pos = buf; 1304 1305 if (write_p == 2) { 1306 wpa_printf(MSG_DEBUG, 1307 "OpenSSL: session ver=0x%x content_type=%d", 1308 version, content_type); 1309 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Data", buf, len); 1310 return; 1311 } 1312 1313 wpa_printf(MSG_DEBUG, "OpenSSL: %s ver=0x%x content_type=%d (%s/%s)", 1314 write_p ? "TX" : "RX", version, content_type, 1315 openssl_content_type(content_type), 1316 openssl_handshake_type(content_type, buf, len)); 1317 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Message", buf, len); 1318 if (content_type == 24 && len >= 3 && pos[0] == 1) { 1319 size_t payload_len = WPA_GET_BE16(pos + 1); 1320 if (payload_len + 3 > len) { 1321 wpa_printf(MSG_ERROR, "OpenSSL: Heartbeat attack detected"); 1322 conn->invalid_hb_used = 1; 1323 } 1324 } 1325 } 1326 1327 1328 struct tls_connection * tls_connection_init(void *ssl_ctx) 1329 { 1330 struct tls_data *data = ssl_ctx; 1331 SSL_CTX *ssl = data->ssl; 1332 struct tls_connection *conn; 1333 long options; 1334 struct tls_context *context = SSL_CTX_get_app_data(ssl); 1335 1336 conn = os_zalloc(sizeof(*conn)); 1337 if (conn == NULL) 1338 return NULL; 1339 conn->ssl_ctx = ssl; 1340 conn->ssl = SSL_new(ssl); 1341 if (conn->ssl == NULL) { 1342 tls_show_errors(MSG_INFO, __func__, 1343 "Failed to initialize new SSL connection"); 1344 os_free(conn); 1345 return NULL; 1346 } 1347 1348 conn->context = context; 1349 SSL_set_app_data(conn->ssl, conn); 1350 SSL_set_msg_callback(conn->ssl, tls_msg_cb); 1351 SSL_set_msg_callback_arg(conn->ssl, conn); 1352 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | 1353 SSL_OP_SINGLE_DH_USE; 1354 #ifdef SSL_OP_NO_COMPRESSION 1355 options |= SSL_OP_NO_COMPRESSION; 1356 #endif /* SSL_OP_NO_COMPRESSION */ 1357 SSL_set_options(conn->ssl, options); 1358 1359 conn->ssl_in = BIO_new(BIO_s_mem()); 1360 if (!conn->ssl_in) { 1361 tls_show_errors(MSG_INFO, __func__, 1362 "Failed to create a new BIO for ssl_in"); 1363 SSL_free(conn->ssl); 1364 os_free(conn); 1365 return NULL; 1366 } 1367 1368 conn->ssl_out = BIO_new(BIO_s_mem()); 1369 if (!conn->ssl_out) { 1370 tls_show_errors(MSG_INFO, __func__, 1371 "Failed to create a new BIO for ssl_out"); 1372 SSL_free(conn->ssl); 1373 BIO_free(conn->ssl_in); 1374 os_free(conn); 1375 return NULL; 1376 } 1377 1378 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out); 1379 1380 return conn; 1381 } 1382 1383 1384 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) 1385 { 1386 if (conn == NULL) 1387 return; 1388 if (conn->success_data) { 1389 /* 1390 * Make sure ssl_clear_bad_session() does not remove this 1391 * session. 1392 */ 1393 SSL_set_quiet_shutdown(conn->ssl, 1); 1394 SSL_shutdown(conn->ssl); 1395 } 1396 SSL_free(conn->ssl); 1397 tls_engine_deinit(conn); 1398 os_free(conn->subject_match); 1399 os_free(conn->altsubject_match); 1400 os_free(conn->suffix_match); 1401 os_free(conn->domain_match); 1402 os_free(conn->session_ticket); 1403 os_free(conn); 1404 } 1405 1406 1407 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) 1408 { 1409 return conn ? SSL_is_init_finished(conn->ssl) : 0; 1410 } 1411 1412 1413 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) 1414 { 1415 if (conn == NULL) 1416 return -1; 1417 1418 /* Shutdown previous TLS connection without notifying the peer 1419 * because the connection was already terminated in practice 1420 * and "close notify" shutdown alert would confuse AS. */ 1421 SSL_set_quiet_shutdown(conn->ssl, 1); 1422 SSL_shutdown(conn->ssl); 1423 return SSL_clear(conn->ssl) == 1 ? 0 : -1; 1424 } 1425 1426 1427 static int tls_match_altsubject_component(X509 *cert, int type, 1428 const char *value, size_t len) 1429 { 1430 GENERAL_NAME *gen; 1431 void *ext; 1432 int found = 0; 1433 stack_index_t i; 1434 1435 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); 1436 1437 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { 1438 gen = sk_GENERAL_NAME_value(ext, i); 1439 if (gen->type != type) 1440 continue; 1441 if (os_strlen((char *) gen->d.ia5->data) == len && 1442 os_memcmp(value, gen->d.ia5->data, len) == 0) 1443 found++; 1444 } 1445 1446 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free); 1447 1448 return found; 1449 } 1450 1451 1452 static int tls_match_altsubject(X509 *cert, const char *match) 1453 { 1454 int type; 1455 const char *pos, *end; 1456 size_t len; 1457 1458 pos = match; 1459 do { 1460 if (os_strncmp(pos, "EMAIL:", 6) == 0) { 1461 type = GEN_EMAIL; 1462 pos += 6; 1463 } else if (os_strncmp(pos, "DNS:", 4) == 0) { 1464 type = GEN_DNS; 1465 pos += 4; 1466 } else if (os_strncmp(pos, "URI:", 4) == 0) { 1467 type = GEN_URI; 1468 pos += 4; 1469 } else { 1470 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName " 1471 "match '%s'", pos); 1472 return 0; 1473 } 1474 end = os_strchr(pos, ';'); 1475 while (end) { 1476 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 || 1477 os_strncmp(end + 1, "DNS:", 4) == 0 || 1478 os_strncmp(end + 1, "URI:", 4) == 0) 1479 break; 1480 end = os_strchr(end + 1, ';'); 1481 } 1482 if (end) 1483 len = end - pos; 1484 else 1485 len = os_strlen(pos); 1486 if (tls_match_altsubject_component(cert, type, pos, len) > 0) 1487 return 1; 1488 pos = end + 1; 1489 } while (end); 1490 1491 return 0; 1492 } 1493 1494 1495 #ifndef CONFIG_NATIVE_WINDOWS 1496 static int domain_suffix_match(const u8 *val, size_t len, const char *match, 1497 int full) 1498 { 1499 size_t i, match_len; 1500 1501 /* Check for embedded nuls that could mess up suffix matching */ 1502 for (i = 0; i < len; i++) { 1503 if (val[i] == '\0') { 1504 wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject"); 1505 return 0; 1506 } 1507 } 1508 1509 match_len = os_strlen(match); 1510 if (match_len > len || (full && match_len != len)) 1511 return 0; 1512 1513 if (os_strncasecmp((const char *) val + len - match_len, match, 1514 match_len) != 0) 1515 return 0; /* no match */ 1516 1517 if (match_len == len) 1518 return 1; /* exact match */ 1519 1520 if (val[len - match_len - 1] == '.') 1521 return 1; /* full label match completes suffix match */ 1522 1523 wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match"); 1524 return 0; 1525 } 1526 #endif /* CONFIG_NATIVE_WINDOWS */ 1527 1528 1529 static int tls_match_suffix(X509 *cert, const char *match, int full) 1530 { 1531 #ifdef CONFIG_NATIVE_WINDOWS 1532 /* wincrypt.h has conflicting X509_NAME definition */ 1533 return -1; 1534 #else /* CONFIG_NATIVE_WINDOWS */ 1535 GENERAL_NAME *gen; 1536 void *ext; 1537 int i; 1538 stack_index_t j; 1539 int dns_name = 0; 1540 X509_NAME *name; 1541 1542 wpa_printf(MSG_DEBUG, "TLS: Match domain against %s%s", 1543 full ? "": "suffix ", match); 1544 1545 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); 1546 1547 for (j = 0; ext && j < sk_GENERAL_NAME_num(ext); j++) { 1548 gen = sk_GENERAL_NAME_value(ext, j); 1549 if (gen->type != GEN_DNS) 1550 continue; 1551 dns_name++; 1552 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName", 1553 gen->d.dNSName->data, 1554 gen->d.dNSName->length); 1555 if (domain_suffix_match(gen->d.dNSName->data, 1556 gen->d.dNSName->length, match, full) == 1557 1) { 1558 wpa_printf(MSG_DEBUG, "TLS: %s in dNSName found", 1559 full ? "Match" : "Suffix match"); 1560 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free); 1561 return 1; 1562 } 1563 } 1564 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free); 1565 1566 if (dns_name) { 1567 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched"); 1568 return 0; 1569 } 1570 1571 name = X509_get_subject_name(cert); 1572 i = -1; 1573 for (;;) { 1574 X509_NAME_ENTRY *e; 1575 ASN1_STRING *cn; 1576 1577 i = X509_NAME_get_index_by_NID(name, NID_commonName, i); 1578 if (i == -1) 1579 break; 1580 e = X509_NAME_get_entry(name, i); 1581 if (e == NULL) 1582 continue; 1583 cn = X509_NAME_ENTRY_get_data(e); 1584 if (cn == NULL) 1585 continue; 1586 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName", 1587 cn->data, cn->length); 1588 if (domain_suffix_match(cn->data, cn->length, match, full) == 1) 1589 { 1590 wpa_printf(MSG_DEBUG, "TLS: %s in commonName found", 1591 full ? "Match" : "Suffix match"); 1592 return 1; 1593 } 1594 } 1595 1596 wpa_printf(MSG_DEBUG, "TLS: No CommonName %smatch found", 1597 full ? "": "suffix "); 1598 return 0; 1599 #endif /* CONFIG_NATIVE_WINDOWS */ 1600 } 1601 1602 1603 static enum tls_fail_reason openssl_tls_fail_reason(int err) 1604 { 1605 switch (err) { 1606 case X509_V_ERR_CERT_REVOKED: 1607 return TLS_FAIL_REVOKED; 1608 case X509_V_ERR_CERT_NOT_YET_VALID: 1609 case X509_V_ERR_CRL_NOT_YET_VALID: 1610 return TLS_FAIL_NOT_YET_VALID; 1611 case X509_V_ERR_CERT_HAS_EXPIRED: 1612 case X509_V_ERR_CRL_HAS_EXPIRED: 1613 return TLS_FAIL_EXPIRED; 1614 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 1615 case X509_V_ERR_UNABLE_TO_GET_CRL: 1616 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 1617 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 1618 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 1619 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 1620 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 1621 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 1622 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 1623 case X509_V_ERR_INVALID_CA: 1624 return TLS_FAIL_UNTRUSTED; 1625 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 1626 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 1627 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 1628 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 1629 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 1630 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 1631 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 1632 case X509_V_ERR_CERT_UNTRUSTED: 1633 case X509_V_ERR_CERT_REJECTED: 1634 return TLS_FAIL_BAD_CERTIFICATE; 1635 default: 1636 return TLS_FAIL_UNSPECIFIED; 1637 } 1638 } 1639 1640 1641 static struct wpabuf * get_x509_cert(X509 *cert) 1642 { 1643 struct wpabuf *buf; 1644 u8 *tmp; 1645 1646 int cert_len = i2d_X509(cert, NULL); 1647 if (cert_len <= 0) 1648 return NULL; 1649 1650 buf = wpabuf_alloc(cert_len); 1651 if (buf == NULL) 1652 return NULL; 1653 1654 tmp = wpabuf_put(buf, cert_len); 1655 i2d_X509(cert, &tmp); 1656 return buf; 1657 } 1658 1659 1660 static void openssl_tls_fail_event(struct tls_connection *conn, 1661 X509 *err_cert, int err, int depth, 1662 const char *subject, const char *err_str, 1663 enum tls_fail_reason reason) 1664 { 1665 union tls_event_data ev; 1666 struct wpabuf *cert = NULL; 1667 struct tls_context *context = conn->context; 1668 1669 if (context->event_cb == NULL) 1670 return; 1671 1672 cert = get_x509_cert(err_cert); 1673 os_memset(&ev, 0, sizeof(ev)); 1674 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ? 1675 reason : openssl_tls_fail_reason(err); 1676 ev.cert_fail.depth = depth; 1677 ev.cert_fail.subject = subject; 1678 ev.cert_fail.reason_txt = err_str; 1679 ev.cert_fail.cert = cert; 1680 context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); 1681 wpabuf_free(cert); 1682 } 1683 1684 1685 static void openssl_tls_cert_event(struct tls_connection *conn, 1686 X509 *err_cert, int depth, 1687 const char *subject) 1688 { 1689 struct wpabuf *cert = NULL; 1690 union tls_event_data ev; 1691 struct tls_context *context = conn->context; 1692 char *altsubject[TLS_MAX_ALT_SUBJECT]; 1693 int alt, num_altsubject = 0; 1694 GENERAL_NAME *gen; 1695 void *ext; 1696 stack_index_t i; 1697 #ifdef CONFIG_SHA256 1698 u8 hash[32]; 1699 #endif /* CONFIG_SHA256 */ 1700 1701 if (context->event_cb == NULL) 1702 return; 1703 1704 os_memset(&ev, 0, sizeof(ev)); 1705 if (conn->cert_probe || (conn->flags & TLS_CONN_EXT_CERT_CHECK) || 1706 context->cert_in_cb) { 1707 cert = get_x509_cert(err_cert); 1708 ev.peer_cert.cert = cert; 1709 } 1710 #ifdef CONFIG_SHA256 1711 if (cert) { 1712 const u8 *addr[1]; 1713 size_t len[1]; 1714 addr[0] = wpabuf_head(cert); 1715 len[0] = wpabuf_len(cert); 1716 if (sha256_vector(1, addr, len, hash) == 0) { 1717 ev.peer_cert.hash = hash; 1718 ev.peer_cert.hash_len = sizeof(hash); 1719 } 1720 } 1721 #endif /* CONFIG_SHA256 */ 1722 ev.peer_cert.depth = depth; 1723 ev.peer_cert.subject = subject; 1724 1725 ext = X509_get_ext_d2i(err_cert, NID_subject_alt_name, NULL, NULL); 1726 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { 1727 char *pos; 1728 1729 if (num_altsubject == TLS_MAX_ALT_SUBJECT) 1730 break; 1731 gen = sk_GENERAL_NAME_value(ext, i); 1732 if (gen->type != GEN_EMAIL && 1733 gen->type != GEN_DNS && 1734 gen->type != GEN_URI) 1735 continue; 1736 1737 pos = os_malloc(10 + gen->d.ia5->length + 1); 1738 if (pos == NULL) 1739 break; 1740 altsubject[num_altsubject++] = pos; 1741 1742 switch (gen->type) { 1743 case GEN_EMAIL: 1744 os_memcpy(pos, "EMAIL:", 6); 1745 pos += 6; 1746 break; 1747 case GEN_DNS: 1748 os_memcpy(pos, "DNS:", 4); 1749 pos += 4; 1750 break; 1751 case GEN_URI: 1752 os_memcpy(pos, "URI:", 4); 1753 pos += 4; 1754 break; 1755 } 1756 1757 os_memcpy(pos, gen->d.ia5->data, gen->d.ia5->length); 1758 pos += gen->d.ia5->length; 1759 *pos = '\0'; 1760 } 1761 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free); 1762 1763 for (alt = 0; alt < num_altsubject; alt++) 1764 ev.peer_cert.altsubject[alt] = altsubject[alt]; 1765 ev.peer_cert.num_altsubject = num_altsubject; 1766 1767 context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev); 1768 wpabuf_free(cert); 1769 for (alt = 0; alt < num_altsubject; alt++) 1770 os_free(altsubject[alt]); 1771 } 1772 1773 1774 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) 1775 { 1776 char buf[256]; 1777 X509 *err_cert; 1778 int err, depth; 1779 SSL *ssl; 1780 struct tls_connection *conn; 1781 struct tls_context *context; 1782 char *match, *altmatch, *suffix_match, *domain_match; 1783 const char *err_str; 1784 1785 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); 1786 if (!err_cert) 1787 return 0; 1788 1789 err = X509_STORE_CTX_get_error(x509_ctx); 1790 depth = X509_STORE_CTX_get_error_depth(x509_ctx); 1791 ssl = X509_STORE_CTX_get_ex_data(x509_ctx, 1792 SSL_get_ex_data_X509_STORE_CTX_idx()); 1793 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); 1794 1795 conn = SSL_get_app_data(ssl); 1796 if (conn == NULL) 1797 return 0; 1798 1799 if (depth == 0) 1800 conn->peer_cert = err_cert; 1801 else if (depth == 1) 1802 conn->peer_issuer = err_cert; 1803 else if (depth == 2) 1804 conn->peer_issuer_issuer = err_cert; 1805 1806 context = conn->context; 1807 match = conn->subject_match; 1808 altmatch = conn->altsubject_match; 1809 suffix_match = conn->suffix_match; 1810 domain_match = conn->domain_match; 1811 1812 if (!preverify_ok && !conn->ca_cert_verify) 1813 preverify_ok = 1; 1814 if (!preverify_ok && depth > 0 && conn->server_cert_only) 1815 preverify_ok = 1; 1816 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) && 1817 (err == X509_V_ERR_CERT_HAS_EXPIRED || 1818 err == X509_V_ERR_CERT_NOT_YET_VALID)) { 1819 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity " 1820 "time mismatch"); 1821 preverify_ok = 1; 1822 } 1823 1824 err_str = X509_verify_cert_error_string(err); 1825 1826 #ifdef CONFIG_SHA256 1827 /* 1828 * Do not require preverify_ok so we can explicity allow otherwise 1829 * invalid pinned server certificates. 1830 */ 1831 if (depth == 0 && conn->server_cert_only) { 1832 struct wpabuf *cert; 1833 cert = get_x509_cert(err_cert); 1834 if (!cert) { 1835 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch " 1836 "server certificate data"); 1837 preverify_ok = 0; 1838 } else { 1839 u8 hash[32]; 1840 const u8 *addr[1]; 1841 size_t len[1]; 1842 addr[0] = wpabuf_head(cert); 1843 len[0] = wpabuf_len(cert); 1844 if (sha256_vector(1, addr, len, hash) < 0 || 1845 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) { 1846 err_str = "Server certificate mismatch"; 1847 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN; 1848 preverify_ok = 0; 1849 } else if (!preverify_ok) { 1850 /* 1851 * Certificate matches pinned certificate, allow 1852 * regardless of other problems. 1853 */ 1854 wpa_printf(MSG_DEBUG, 1855 "OpenSSL: Ignore validation issues for a pinned server certificate"); 1856 preverify_ok = 1; 1857 } 1858 wpabuf_free(cert); 1859 } 1860 } 1861 #endif /* CONFIG_SHA256 */ 1862 1863 if (!preverify_ok) { 1864 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," 1865 " error %d (%s) depth %d for '%s'", err, err_str, 1866 depth, buf); 1867 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1868 err_str, TLS_FAIL_UNSPECIFIED); 1869 return preverify_ok; 1870 } 1871 1872 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d " 1873 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'", 1874 preverify_ok, err, err_str, 1875 conn->ca_cert_verify, depth, buf); 1876 if (depth == 0 && match && os_strstr(buf, match) == NULL) { 1877 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " 1878 "match with '%s'", buf, match); 1879 preverify_ok = 0; 1880 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1881 "Subject mismatch", 1882 TLS_FAIL_SUBJECT_MISMATCH); 1883 } else if (depth == 0 && altmatch && 1884 !tls_match_altsubject(err_cert, altmatch)) { 1885 wpa_printf(MSG_WARNING, "TLS: altSubjectName match " 1886 "'%s' not found", altmatch); 1887 preverify_ok = 0; 1888 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1889 "AltSubject mismatch", 1890 TLS_FAIL_ALTSUBJECT_MISMATCH); 1891 } else if (depth == 0 && suffix_match && 1892 !tls_match_suffix(err_cert, suffix_match, 0)) { 1893 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found", 1894 suffix_match); 1895 preverify_ok = 0; 1896 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1897 "Domain suffix mismatch", 1898 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH); 1899 } else if (depth == 0 && domain_match && 1900 !tls_match_suffix(err_cert, domain_match, 1)) { 1901 wpa_printf(MSG_WARNING, "TLS: Domain match '%s' not found", 1902 domain_match); 1903 preverify_ok = 0; 1904 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1905 "Domain mismatch", 1906 TLS_FAIL_DOMAIN_MISMATCH); 1907 } else 1908 openssl_tls_cert_event(conn, err_cert, depth, buf); 1909 1910 if (conn->cert_probe && preverify_ok && depth == 0) { 1911 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate " 1912 "on probe-only run"); 1913 preverify_ok = 0; 1914 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1915 "Server certificate chain probe", 1916 TLS_FAIL_SERVER_CHAIN_PROBE); 1917 } 1918 1919 #ifdef OPENSSL_IS_BORINGSSL 1920 if (depth == 0 && (conn->flags & TLS_CONN_REQUEST_OCSP) && 1921 preverify_ok) { 1922 enum ocsp_result res; 1923 1924 res = check_ocsp_resp(conn->ssl_ctx, conn->ssl, err_cert, 1925 conn->peer_issuer, 1926 conn->peer_issuer_issuer); 1927 if (res == OCSP_REVOKED) { 1928 preverify_ok = 0; 1929 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1930 "certificate revoked", 1931 TLS_FAIL_REVOKED); 1932 if (err == X509_V_OK) 1933 X509_STORE_CTX_set_error( 1934 x509_ctx, X509_V_ERR_CERT_REVOKED); 1935 } else if (res != OCSP_GOOD && 1936 (conn->flags & TLS_CONN_REQUIRE_OCSP)) { 1937 preverify_ok = 0; 1938 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1939 "bad certificate status response", 1940 TLS_FAIL_UNSPECIFIED); 1941 } 1942 } 1943 #endif /* OPENSSL_IS_BORINGSSL */ 1944 1945 if (depth == 0 && preverify_ok && context->event_cb != NULL) 1946 context->event_cb(context->cb_ctx, 1947 TLS_CERT_CHAIN_SUCCESS, NULL); 1948 1949 return preverify_ok; 1950 } 1951 1952 1953 #ifndef OPENSSL_NO_STDIO 1954 static int tls_load_ca_der(struct tls_data *data, const char *ca_cert) 1955 { 1956 SSL_CTX *ssl_ctx = data->ssl; 1957 X509_LOOKUP *lookup; 1958 int ret = 0; 1959 1960 lookup = X509_STORE_add_lookup(SSL_CTX_get_cert_store(ssl_ctx), 1961 X509_LOOKUP_file()); 1962 if (lookup == NULL) { 1963 tls_show_errors(MSG_WARNING, __func__, 1964 "Failed add lookup for X509 store"); 1965 return -1; 1966 } 1967 1968 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) { 1969 unsigned long err = ERR_peek_error(); 1970 tls_show_errors(MSG_WARNING, __func__, 1971 "Failed load CA in DER format"); 1972 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1973 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1974 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1975 "cert already in hash table error", 1976 __func__); 1977 } else 1978 ret = -1; 1979 } 1980 1981 return ret; 1982 } 1983 #endif /* OPENSSL_NO_STDIO */ 1984 1985 1986 static int tls_connection_ca_cert(struct tls_data *data, 1987 struct tls_connection *conn, 1988 const char *ca_cert, const u8 *ca_cert_blob, 1989 size_t ca_cert_blob_len, const char *ca_path) 1990 { 1991 SSL_CTX *ssl_ctx = data->ssl; 1992 X509_STORE *store; 1993 1994 /* 1995 * Remove previously configured trusted CA certificates before adding 1996 * new ones. 1997 */ 1998 store = X509_STORE_new(); 1999 if (store == NULL) { 2000 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 2001 "certificate store", __func__); 2002 return -1; 2003 } 2004 SSL_CTX_set_cert_store(ssl_ctx, store); 2005 2006 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 2007 conn->ca_cert_verify = 1; 2008 2009 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) { 2010 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate " 2011 "chain"); 2012 conn->cert_probe = 1; 2013 conn->ca_cert_verify = 0; 2014 return 0; 2015 } 2016 2017 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) { 2018 #ifdef CONFIG_SHA256 2019 const char *pos = ca_cert + 7; 2020 if (os_strncmp(pos, "server/sha256/", 14) != 0) { 2021 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert " 2022 "hash value '%s'", ca_cert); 2023 return -1; 2024 } 2025 pos += 14; 2026 if (os_strlen(pos) != 32 * 2) { 2027 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 " 2028 "hash length in ca_cert '%s'", ca_cert); 2029 return -1; 2030 } 2031 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) { 2032 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash " 2033 "value in ca_cert '%s'", ca_cert); 2034 return -1; 2035 } 2036 conn->server_cert_only = 1; 2037 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server " 2038 "certificate match"); 2039 return 0; 2040 #else /* CONFIG_SHA256 */ 2041 wpa_printf(MSG_INFO, "No SHA256 included in the build - " 2042 "cannot validate server certificate hash"); 2043 return -1; 2044 #endif /* CONFIG_SHA256 */ 2045 } 2046 2047 if (ca_cert_blob) { 2048 X509 *cert = d2i_X509(NULL, 2049 (const unsigned char **) &ca_cert_blob, 2050 ca_cert_blob_len); 2051 if (cert == NULL) { 2052 tls_show_errors(MSG_WARNING, __func__, 2053 "Failed to parse ca_cert_blob"); 2054 return -1; 2055 } 2056 2057 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx), 2058 cert)) { 2059 unsigned long err = ERR_peek_error(); 2060 tls_show_errors(MSG_WARNING, __func__, 2061 "Failed to add ca_cert_blob to " 2062 "certificate store"); 2063 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 2064 ERR_GET_REASON(err) == 2065 X509_R_CERT_ALREADY_IN_HASH_TABLE) { 2066 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 2067 "cert already in hash table error", 2068 __func__); 2069 } else { 2070 X509_free(cert); 2071 return -1; 2072 } 2073 } 2074 X509_free(cert); 2075 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob " 2076 "to certificate store", __func__); 2077 return 0; 2078 } 2079 2080 #ifdef ANDROID 2081 /* Single alias */ 2082 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) { 2083 if (tls_add_ca_from_keystore(SSL_CTX_get_cert_store(ssl_ctx), 2084 &ca_cert[11]) < 0) 2085 return -1; 2086 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 2087 return 0; 2088 } 2089 2090 /* Multiple aliases separated by space */ 2091 if (ca_cert && os_strncmp("keystores://", ca_cert, 12) == 0) { 2092 char *aliases = os_strdup(&ca_cert[12]); 2093 const char *delim = " "; 2094 int rc = 0; 2095 char *savedptr; 2096 char *alias; 2097 2098 if (!aliases) 2099 return -1; 2100 alias = strtok_r(aliases, delim, &savedptr); 2101 for (; alias; alias = strtok_r(NULL, delim, &savedptr)) { 2102 if (tls_add_ca_from_keystore_encoded( 2103 SSL_CTX_get_cert_store(ssl_ctx), alias)) { 2104 wpa_printf(MSG_WARNING, 2105 "OpenSSL: %s - Failed to add ca_cert %s from keystore", 2106 __func__, alias); 2107 rc = -1; 2108 break; 2109 } 2110 } 2111 os_free(aliases); 2112 if (rc) 2113 return rc; 2114 2115 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 2116 return 0; 2117 } 2118 #endif /* ANDROID */ 2119 2120 #ifdef CONFIG_NATIVE_WINDOWS 2121 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) == 2122 0) { 2123 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from " 2124 "system certificate store"); 2125 return 0; 2126 } 2127 #endif /* CONFIG_NATIVE_WINDOWS */ 2128 2129 if (ca_cert || ca_path) { 2130 #ifndef OPENSSL_NO_STDIO 2131 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) != 2132 1) { 2133 tls_show_errors(MSG_WARNING, __func__, 2134 "Failed to load root certificates"); 2135 if (ca_cert && 2136 tls_load_ca_der(data, ca_cert) == 0) { 2137 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded " 2138 "DER format CA certificate", 2139 __func__); 2140 } else 2141 return -1; 2142 } else { 2143 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 2144 "certificate(s) loaded"); 2145 tls_get_errors(data); 2146 } 2147 #else /* OPENSSL_NO_STDIO */ 2148 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 2149 __func__); 2150 return -1; 2151 #endif /* OPENSSL_NO_STDIO */ 2152 } else { 2153 /* No ca_cert configured - do not try to verify server 2154 * certificate */ 2155 conn->ca_cert_verify = 0; 2156 } 2157 2158 return 0; 2159 } 2160 2161 2162 static int tls_global_ca_cert(struct tls_data *data, const char *ca_cert) 2163 { 2164 SSL_CTX *ssl_ctx = data->ssl; 2165 2166 if (ca_cert) { 2167 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1) 2168 { 2169 tls_show_errors(MSG_WARNING, __func__, 2170 "Failed to load root certificates"); 2171 return -1; 2172 } 2173 2174 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 2175 "certificate(s) loaded"); 2176 2177 #ifndef OPENSSL_NO_STDIO 2178 /* Add the same CAs to the client certificate requests */ 2179 SSL_CTX_set_client_CA_list(ssl_ctx, 2180 SSL_load_client_CA_file(ca_cert)); 2181 #endif /* OPENSSL_NO_STDIO */ 2182 } 2183 2184 return 0; 2185 } 2186 2187 2188 int tls_global_set_verify(void *ssl_ctx, int check_crl) 2189 { 2190 int flags; 2191 2192 if (check_crl) { 2193 struct tls_data *data = ssl_ctx; 2194 X509_STORE *cs = SSL_CTX_get_cert_store(data->ssl); 2195 if (cs == NULL) { 2196 tls_show_errors(MSG_INFO, __func__, "Failed to get " 2197 "certificate store when enabling " 2198 "check_crl"); 2199 return -1; 2200 } 2201 flags = X509_V_FLAG_CRL_CHECK; 2202 if (check_crl == 2) 2203 flags |= X509_V_FLAG_CRL_CHECK_ALL; 2204 X509_STORE_set_flags(cs, flags); 2205 } 2206 return 0; 2207 } 2208 2209 2210 static int tls_connection_set_subject_match(struct tls_connection *conn, 2211 const char *subject_match, 2212 const char *altsubject_match, 2213 const char *suffix_match, 2214 const char *domain_match) 2215 { 2216 os_free(conn->subject_match); 2217 conn->subject_match = NULL; 2218 if (subject_match) { 2219 conn->subject_match = os_strdup(subject_match); 2220 if (conn->subject_match == NULL) 2221 return -1; 2222 } 2223 2224 os_free(conn->altsubject_match); 2225 conn->altsubject_match = NULL; 2226 if (altsubject_match) { 2227 conn->altsubject_match = os_strdup(altsubject_match); 2228 if (conn->altsubject_match == NULL) 2229 return -1; 2230 } 2231 2232 os_free(conn->suffix_match); 2233 conn->suffix_match = NULL; 2234 if (suffix_match) { 2235 conn->suffix_match = os_strdup(suffix_match); 2236 if (conn->suffix_match == NULL) 2237 return -1; 2238 } 2239 2240 os_free(conn->domain_match); 2241 conn->domain_match = NULL; 2242 if (domain_match) { 2243 conn->domain_match = os_strdup(domain_match); 2244 if (conn->domain_match == NULL) 2245 return -1; 2246 } 2247 2248 return 0; 2249 } 2250 2251 2252 static void tls_set_conn_flags(SSL *ssl, unsigned int flags) 2253 { 2254 #ifdef SSL_OP_NO_TICKET 2255 if (flags & TLS_CONN_DISABLE_SESSION_TICKET) 2256 SSL_set_options(ssl, SSL_OP_NO_TICKET); 2257 #ifdef SSL_clear_options 2258 else 2259 SSL_clear_options(ssl, SSL_OP_NO_TICKET); 2260 #endif /* SSL_clear_options */ 2261 #endif /* SSL_OP_NO_TICKET */ 2262 2263 #ifdef SSL_OP_NO_TLSv1 2264 if (flags & TLS_CONN_DISABLE_TLSv1_0) 2265 SSL_set_options(ssl, SSL_OP_NO_TLSv1); 2266 else 2267 SSL_clear_options(ssl, SSL_OP_NO_TLSv1); 2268 #endif /* SSL_OP_NO_TLSv1 */ 2269 #ifdef SSL_OP_NO_TLSv1_1 2270 if (flags & TLS_CONN_DISABLE_TLSv1_1) 2271 SSL_set_options(ssl, SSL_OP_NO_TLSv1_1); 2272 else 2273 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_1); 2274 #endif /* SSL_OP_NO_TLSv1_1 */ 2275 #ifdef SSL_OP_NO_TLSv1_2 2276 if (flags & TLS_CONN_DISABLE_TLSv1_2) 2277 SSL_set_options(ssl, SSL_OP_NO_TLSv1_2); 2278 else 2279 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_2); 2280 #endif /* SSL_OP_NO_TLSv1_2 */ 2281 } 2282 2283 2284 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, 2285 int verify_peer, unsigned int flags, 2286 const u8 *session_ctx, size_t session_ctx_len) 2287 { 2288 static int counter = 0; 2289 struct tls_data *data = ssl_ctx; 2290 2291 if (conn == NULL) 2292 return -1; 2293 2294 if (verify_peer) { 2295 conn->ca_cert_verify = 1; 2296 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER | 2297 SSL_VERIFY_FAIL_IF_NO_PEER_CERT | 2298 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb); 2299 } else { 2300 conn->ca_cert_verify = 0; 2301 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL); 2302 } 2303 2304 tls_set_conn_flags(conn->ssl, flags); 2305 conn->flags = flags; 2306 2307 SSL_set_accept_state(conn->ssl); 2308 2309 if (data->tls_session_lifetime == 0) { 2310 /* 2311 * Set session id context to a unique value to make sure 2312 * session resumption cannot be used either through session 2313 * caching or TLS ticket extension. 2314 */ 2315 counter++; 2316 SSL_set_session_id_context(conn->ssl, 2317 (const unsigned char *) &counter, 2318 sizeof(counter)); 2319 } else if (session_ctx) { 2320 SSL_set_session_id_context(conn->ssl, session_ctx, 2321 session_ctx_len); 2322 } 2323 2324 return 0; 2325 } 2326 2327 2328 static int tls_connection_client_cert(struct tls_connection *conn, 2329 const char *client_cert, 2330 const u8 *client_cert_blob, 2331 size_t client_cert_blob_len) 2332 { 2333 if (client_cert == NULL && client_cert_blob == NULL) 2334 return 0; 2335 2336 #ifdef PKCS12_FUNCS 2337 #if OPENSSL_VERSION_NUMBER < 0x10002000L 2338 /* 2339 * Clear previously set extra chain certificates, if any, from PKCS#12 2340 * processing in tls_parse_pkcs12() to allow OpenSSL to build a new 2341 * chain properly. 2342 */ 2343 SSL_CTX_clear_extra_chain_certs(conn->ssl_ctx); 2344 #endif /* OPENSSL_VERSION_NUMBER < 0x10002000L */ 2345 #endif /* PKCS12_FUNCS */ 2346 2347 if (client_cert_blob && 2348 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob, 2349 client_cert_blob_len) == 1) { 2350 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> " 2351 "OK"); 2352 return 0; 2353 } else if (client_cert_blob) { 2354 tls_show_errors(MSG_DEBUG, __func__, 2355 "SSL_use_certificate_ASN1 failed"); 2356 } 2357 2358 if (client_cert == NULL) 2359 return -1; 2360 2361 #ifdef ANDROID 2362 if (os_strncmp("keystore://", client_cert, 11) == 0) { 2363 BIO *bio = BIO_from_keystore(&client_cert[11]); 2364 X509 *x509 = NULL; 2365 int ret = -1; 2366 if (bio) { 2367 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); 2368 BIO_free(bio); 2369 } 2370 if (x509) { 2371 if (SSL_use_certificate(conn->ssl, x509) == 1) 2372 ret = 0; 2373 X509_free(x509); 2374 } 2375 return ret; 2376 } 2377 #endif /* ANDROID */ 2378 2379 #ifndef OPENSSL_NO_STDIO 2380 if (SSL_use_certificate_file(conn->ssl, client_cert, 2381 SSL_FILETYPE_ASN1) == 1) { 2382 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)" 2383 " --> OK"); 2384 return 0; 2385 } 2386 2387 if (SSL_use_certificate_file(conn->ssl, client_cert, 2388 SSL_FILETYPE_PEM) == 1) { 2389 ERR_clear_error(); 2390 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)" 2391 " --> OK"); 2392 return 0; 2393 } 2394 2395 tls_show_errors(MSG_DEBUG, __func__, 2396 "SSL_use_certificate_file failed"); 2397 #else /* OPENSSL_NO_STDIO */ 2398 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 2399 #endif /* OPENSSL_NO_STDIO */ 2400 2401 return -1; 2402 } 2403 2404 2405 static int tls_global_client_cert(struct tls_data *data, 2406 const char *client_cert) 2407 { 2408 #ifndef OPENSSL_NO_STDIO 2409 SSL_CTX *ssl_ctx = data->ssl; 2410 2411 if (client_cert == NULL) 2412 return 0; 2413 2414 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 2415 SSL_FILETYPE_ASN1) != 1 && 2416 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 && 2417 SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 2418 SSL_FILETYPE_PEM) != 1) { 2419 tls_show_errors(MSG_INFO, __func__, 2420 "Failed to load client certificate"); 2421 return -1; 2422 } 2423 return 0; 2424 #else /* OPENSSL_NO_STDIO */ 2425 if (client_cert == NULL) 2426 return 0; 2427 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 2428 return -1; 2429 #endif /* OPENSSL_NO_STDIO */ 2430 } 2431 2432 2433 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password) 2434 { 2435 if (password == NULL) { 2436 return 0; 2437 } 2438 os_strlcpy(buf, (char *) password, size); 2439 return os_strlen(buf); 2440 } 2441 2442 2443 #ifdef PKCS12_FUNCS 2444 static int tls_parse_pkcs12(struct tls_data *data, SSL *ssl, PKCS12 *p12, 2445 const char *passwd) 2446 { 2447 EVP_PKEY *pkey; 2448 X509 *cert; 2449 STACK_OF(X509) *certs; 2450 int res = 0; 2451 char buf[256]; 2452 2453 pkey = NULL; 2454 cert = NULL; 2455 certs = NULL; 2456 if (!passwd) 2457 passwd = ""; 2458 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) { 2459 tls_show_errors(MSG_DEBUG, __func__, 2460 "Failed to parse PKCS12 file"); 2461 PKCS12_free(p12); 2462 return -1; 2463 } 2464 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data"); 2465 2466 if (cert) { 2467 X509_NAME_oneline(X509_get_subject_name(cert), buf, 2468 sizeof(buf)); 2469 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: " 2470 "subject='%s'", buf); 2471 if (ssl) { 2472 if (SSL_use_certificate(ssl, cert) != 1) 2473 res = -1; 2474 } else { 2475 if (SSL_CTX_use_certificate(data->ssl, cert) != 1) 2476 res = -1; 2477 } 2478 X509_free(cert); 2479 } 2480 2481 if (pkey) { 2482 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12"); 2483 if (ssl) { 2484 if (SSL_use_PrivateKey(ssl, pkey) != 1) 2485 res = -1; 2486 } else { 2487 if (SSL_CTX_use_PrivateKey(data->ssl, pkey) != 1) 2488 res = -1; 2489 } 2490 EVP_PKEY_free(pkey); 2491 } 2492 2493 if (certs) { 2494 #if OPENSSL_VERSION_NUMBER >= 0x10002000L && !defined(LIBRESSL_VERSION_NUMBER) 2495 if (ssl) 2496 SSL_clear_chain_certs(ssl); 2497 else 2498 SSL_CTX_clear_chain_certs(data->ssl); 2499 while ((cert = sk_X509_pop(certs)) != NULL) { 2500 X509_NAME_oneline(X509_get_subject_name(cert), buf, 2501 sizeof(buf)); 2502 wpa_printf(MSG_DEBUG, "TLS: additional certificate" 2503 " from PKCS12: subject='%s'", buf); 2504 if ((ssl && SSL_add1_chain_cert(ssl, cert) != 1) || 2505 (!ssl && SSL_CTX_add1_chain_cert(data->ssl, 2506 cert) != 1)) { 2507 tls_show_errors(MSG_DEBUG, __func__, 2508 "Failed to add additional certificate"); 2509 res = -1; 2510 X509_free(cert); 2511 break; 2512 } 2513 X509_free(cert); 2514 } 2515 if (!res) { 2516 /* Try to continue anyway */ 2517 } 2518 sk_X509_pop_free(certs, X509_free); 2519 #ifndef OPENSSL_IS_BORINGSSL 2520 if (ssl) 2521 res = SSL_build_cert_chain( 2522 ssl, 2523 SSL_BUILD_CHAIN_FLAG_CHECK | 2524 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR); 2525 else 2526 res = SSL_CTX_build_cert_chain( 2527 data->ssl, 2528 SSL_BUILD_CHAIN_FLAG_CHECK | 2529 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR); 2530 if (!res) { 2531 tls_show_errors(MSG_DEBUG, __func__, 2532 "Failed to build certificate chain"); 2533 } else if (res == 2) { 2534 wpa_printf(MSG_DEBUG, 2535 "TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates"); 2536 } 2537 #endif /* OPENSSL_IS_BORINGSSL */ 2538 /* 2539 * Try to continue regardless of result since it is possible for 2540 * the extra certificates not to be required. 2541 */ 2542 res = 0; 2543 #else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */ 2544 SSL_CTX_clear_extra_chain_certs(data->ssl); 2545 while ((cert = sk_X509_pop(certs)) != NULL) { 2546 X509_NAME_oneline(X509_get_subject_name(cert), buf, 2547 sizeof(buf)); 2548 wpa_printf(MSG_DEBUG, "TLS: additional certificate" 2549 " from PKCS12: subject='%s'", buf); 2550 /* 2551 * There is no SSL equivalent for the chain cert - so 2552 * always add it to the context... 2553 */ 2554 if (SSL_CTX_add_extra_chain_cert(data->ssl, cert) != 1) 2555 { 2556 X509_free(cert); 2557 res = -1; 2558 break; 2559 } 2560 } 2561 sk_X509_pop_free(certs, X509_free); 2562 #endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */ 2563 } 2564 2565 PKCS12_free(p12); 2566 2567 if (res < 0) 2568 tls_get_errors(data); 2569 2570 return res; 2571 } 2572 #endif /* PKCS12_FUNCS */ 2573 2574 2575 static int tls_read_pkcs12(struct tls_data *data, SSL *ssl, 2576 const char *private_key, const char *passwd) 2577 { 2578 #ifdef PKCS12_FUNCS 2579 FILE *f; 2580 PKCS12 *p12; 2581 2582 f = fopen(private_key, "rb"); 2583 if (f == NULL) 2584 return -1; 2585 2586 p12 = d2i_PKCS12_fp(f, NULL); 2587 fclose(f); 2588 2589 if (p12 == NULL) { 2590 tls_show_errors(MSG_INFO, __func__, 2591 "Failed to use PKCS#12 file"); 2592 return -1; 2593 } 2594 2595 return tls_parse_pkcs12(data, ssl, p12, passwd); 2596 2597 #else /* PKCS12_FUNCS */ 2598 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read " 2599 "p12/pfx files"); 2600 return -1; 2601 #endif /* PKCS12_FUNCS */ 2602 } 2603 2604 2605 static int tls_read_pkcs12_blob(struct tls_data *data, SSL *ssl, 2606 const u8 *blob, size_t len, const char *passwd) 2607 { 2608 #ifdef PKCS12_FUNCS 2609 PKCS12 *p12; 2610 2611 p12 = d2i_PKCS12(NULL, (const unsigned char **) &blob, len); 2612 if (p12 == NULL) { 2613 tls_show_errors(MSG_INFO, __func__, 2614 "Failed to use PKCS#12 blob"); 2615 return -1; 2616 } 2617 2618 return tls_parse_pkcs12(data, ssl, p12, passwd); 2619 2620 #else /* PKCS12_FUNCS */ 2621 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse " 2622 "p12/pfx blobs"); 2623 return -1; 2624 #endif /* PKCS12_FUNCS */ 2625 } 2626 2627 2628 #ifndef OPENSSL_NO_ENGINE 2629 static int tls_engine_get_cert(struct tls_connection *conn, 2630 const char *cert_id, 2631 X509 **cert) 2632 { 2633 /* this runs after the private key is loaded so no PIN is required */ 2634 struct { 2635 const char *cert_id; 2636 X509 *cert; 2637 } params; 2638 params.cert_id = cert_id; 2639 params.cert = NULL; 2640 2641 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL", 2642 0, ¶ms, NULL, 1)) { 2643 unsigned long err = ERR_get_error(); 2644 2645 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id" 2646 " '%s' [%s]", cert_id, 2647 ERR_error_string(err, NULL)); 2648 if (tls_is_pin_error(err)) 2649 return TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN; 2650 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 2651 } 2652 if (!params.cert) { 2653 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id" 2654 " '%s'", cert_id); 2655 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 2656 } 2657 *cert = params.cert; 2658 return 0; 2659 } 2660 #endif /* OPENSSL_NO_ENGINE */ 2661 2662 2663 static int tls_connection_engine_client_cert(struct tls_connection *conn, 2664 const char *cert_id) 2665 { 2666 #ifndef OPENSSL_NO_ENGINE 2667 X509 *cert; 2668 2669 if (tls_engine_get_cert(conn, cert_id, &cert)) 2670 return -1; 2671 2672 if (!SSL_use_certificate(conn->ssl, cert)) { 2673 tls_show_errors(MSG_ERROR, __func__, 2674 "SSL_use_certificate failed"); 2675 X509_free(cert); 2676 return -1; 2677 } 2678 X509_free(cert); 2679 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> " 2680 "OK"); 2681 return 0; 2682 2683 #else /* OPENSSL_NO_ENGINE */ 2684 return -1; 2685 #endif /* OPENSSL_NO_ENGINE */ 2686 } 2687 2688 2689 static int tls_connection_engine_ca_cert(struct tls_data *data, 2690 struct tls_connection *conn, 2691 const char *ca_cert_id) 2692 { 2693 #ifndef OPENSSL_NO_ENGINE 2694 X509 *cert; 2695 SSL_CTX *ssl_ctx = data->ssl; 2696 X509_STORE *store; 2697 2698 if (tls_engine_get_cert(conn, ca_cert_id, &cert)) 2699 return -1; 2700 2701 /* start off the same as tls_connection_ca_cert */ 2702 store = X509_STORE_new(); 2703 if (store == NULL) { 2704 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 2705 "certificate store", __func__); 2706 X509_free(cert); 2707 return -1; 2708 } 2709 SSL_CTX_set_cert_store(ssl_ctx, store); 2710 if (!X509_STORE_add_cert(store, cert)) { 2711 unsigned long err = ERR_peek_error(); 2712 tls_show_errors(MSG_WARNING, __func__, 2713 "Failed to add CA certificate from engine " 2714 "to certificate store"); 2715 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 2716 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 2717 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert" 2718 " already in hash table error", 2719 __func__); 2720 } else { 2721 X509_free(cert); 2722 return -1; 2723 } 2724 } 2725 X509_free(cert); 2726 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine " 2727 "to certificate store", __func__); 2728 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 2729 conn->ca_cert_verify = 1; 2730 2731 return 0; 2732 2733 #else /* OPENSSL_NO_ENGINE */ 2734 return -1; 2735 #endif /* OPENSSL_NO_ENGINE */ 2736 } 2737 2738 2739 static int tls_connection_engine_private_key(struct tls_connection *conn) 2740 { 2741 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE) 2742 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) { 2743 tls_show_errors(MSG_ERROR, __func__, 2744 "ENGINE: cannot use private key for TLS"); 2745 return -1; 2746 } 2747 if (!SSL_check_private_key(conn->ssl)) { 2748 tls_show_errors(MSG_INFO, __func__, 2749 "Private key failed verification"); 2750 return -1; 2751 } 2752 return 0; 2753 #else /* OPENSSL_NO_ENGINE */ 2754 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but " 2755 "engine support was not compiled in"); 2756 return -1; 2757 #endif /* OPENSSL_NO_ENGINE */ 2758 } 2759 2760 2761 static int tls_connection_private_key(struct tls_data *data, 2762 struct tls_connection *conn, 2763 const char *private_key, 2764 const char *private_key_passwd, 2765 const u8 *private_key_blob, 2766 size_t private_key_blob_len) 2767 { 2768 SSL_CTX *ssl_ctx = data->ssl; 2769 char *passwd; 2770 int ok; 2771 2772 if (private_key == NULL && private_key_blob == NULL) 2773 return 0; 2774 2775 if (private_key_passwd) { 2776 passwd = os_strdup(private_key_passwd); 2777 if (passwd == NULL) 2778 return -1; 2779 } else 2780 passwd = NULL; 2781 2782 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 2783 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 2784 2785 ok = 0; 2786 while (private_key_blob) { 2787 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl, 2788 (u8 *) private_key_blob, 2789 private_key_blob_len) == 1) { 2790 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 2791 "ASN1(EVP_PKEY_RSA) --> OK"); 2792 ok = 1; 2793 break; 2794 } 2795 2796 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl, 2797 (u8 *) private_key_blob, 2798 private_key_blob_len) == 1) { 2799 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 2800 "ASN1(EVP_PKEY_DSA) --> OK"); 2801 ok = 1; 2802 break; 2803 } 2804 2805 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl, 2806 (u8 *) private_key_blob, 2807 private_key_blob_len) == 1) { 2808 wpa_printf(MSG_DEBUG, "OpenSSL: " 2809 "SSL_use_RSAPrivateKey_ASN1 --> OK"); 2810 ok = 1; 2811 break; 2812 } 2813 2814 if (tls_read_pkcs12_blob(data, conn->ssl, private_key_blob, 2815 private_key_blob_len, passwd) == 0) { 2816 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> " 2817 "OK"); 2818 ok = 1; 2819 break; 2820 } 2821 2822 break; 2823 } 2824 2825 while (!ok && private_key) { 2826 #ifndef OPENSSL_NO_STDIO 2827 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2828 SSL_FILETYPE_ASN1) == 1) { 2829 wpa_printf(MSG_DEBUG, "OpenSSL: " 2830 "SSL_use_PrivateKey_File (DER) --> OK"); 2831 ok = 1; 2832 break; 2833 } 2834 2835 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2836 SSL_FILETYPE_PEM) == 1) { 2837 wpa_printf(MSG_DEBUG, "OpenSSL: " 2838 "SSL_use_PrivateKey_File (PEM) --> OK"); 2839 ok = 1; 2840 break; 2841 } 2842 #else /* OPENSSL_NO_STDIO */ 2843 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 2844 __func__); 2845 #endif /* OPENSSL_NO_STDIO */ 2846 2847 if (tls_read_pkcs12(data, conn->ssl, private_key, passwd) 2848 == 0) { 2849 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file " 2850 "--> OK"); 2851 ok = 1; 2852 break; 2853 } 2854 2855 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) { 2856 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to " 2857 "access certificate store --> OK"); 2858 ok = 1; 2859 break; 2860 } 2861 2862 break; 2863 } 2864 2865 if (!ok) { 2866 tls_show_errors(MSG_INFO, __func__, 2867 "Failed to load private key"); 2868 os_free(passwd); 2869 return -1; 2870 } 2871 ERR_clear_error(); 2872 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2873 os_free(passwd); 2874 2875 if (!SSL_check_private_key(conn->ssl)) { 2876 tls_show_errors(MSG_INFO, __func__, "Private key failed " 2877 "verification"); 2878 return -1; 2879 } 2880 2881 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully"); 2882 return 0; 2883 } 2884 2885 2886 static int tls_global_private_key(struct tls_data *data, 2887 const char *private_key, 2888 const char *private_key_passwd) 2889 { 2890 SSL_CTX *ssl_ctx = data->ssl; 2891 char *passwd; 2892 2893 if (private_key == NULL) 2894 return 0; 2895 2896 if (private_key_passwd) { 2897 passwd = os_strdup(private_key_passwd); 2898 if (passwd == NULL) 2899 return -1; 2900 } else 2901 passwd = NULL; 2902 2903 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 2904 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 2905 if ( 2906 #ifndef OPENSSL_NO_STDIO 2907 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2908 SSL_FILETYPE_ASN1) != 1 && 2909 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2910 SSL_FILETYPE_PEM) != 1 && 2911 #endif /* OPENSSL_NO_STDIO */ 2912 tls_read_pkcs12(data, NULL, private_key, passwd)) { 2913 tls_show_errors(MSG_INFO, __func__, 2914 "Failed to load private key"); 2915 os_free(passwd); 2916 ERR_clear_error(); 2917 return -1; 2918 } 2919 os_free(passwd); 2920 ERR_clear_error(); 2921 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2922 2923 if (!SSL_CTX_check_private_key(ssl_ctx)) { 2924 tls_show_errors(MSG_INFO, __func__, 2925 "Private key failed verification"); 2926 return -1; 2927 } 2928 2929 return 0; 2930 } 2931 2932 2933 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file) 2934 { 2935 #ifdef OPENSSL_NO_DH 2936 if (dh_file == NULL) 2937 return 0; 2938 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2939 "dh_file specified"); 2940 return -1; 2941 #else /* OPENSSL_NO_DH */ 2942 DH *dh; 2943 BIO *bio; 2944 2945 /* TODO: add support for dh_blob */ 2946 if (dh_file == NULL) 2947 return 0; 2948 if (conn == NULL) 2949 return -1; 2950 2951 bio = BIO_new_file(dh_file, "r"); 2952 if (bio == NULL) { 2953 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2954 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2955 return -1; 2956 } 2957 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2958 BIO_free(bio); 2959 #ifndef OPENSSL_NO_DSA 2960 while (dh == NULL) { 2961 DSA *dsa; 2962 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2963 " trying to parse as DSA params", dh_file, 2964 ERR_error_string(ERR_get_error(), NULL)); 2965 bio = BIO_new_file(dh_file, "r"); 2966 if (bio == NULL) 2967 break; 2968 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2969 BIO_free(bio); 2970 if (!dsa) { 2971 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2972 "'%s': %s", dh_file, 2973 ERR_error_string(ERR_get_error(), NULL)); 2974 break; 2975 } 2976 2977 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2978 dh = DSA_dup_DH(dsa); 2979 DSA_free(dsa); 2980 if (dh == NULL) { 2981 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2982 "params into DH params"); 2983 break; 2984 } 2985 break; 2986 } 2987 #endif /* !OPENSSL_NO_DSA */ 2988 if (dh == NULL) { 2989 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2990 "'%s'", dh_file); 2991 return -1; 2992 } 2993 2994 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) { 2995 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2996 "%s", dh_file, 2997 ERR_error_string(ERR_get_error(), NULL)); 2998 DH_free(dh); 2999 return -1; 3000 } 3001 DH_free(dh); 3002 return 0; 3003 #endif /* OPENSSL_NO_DH */ 3004 } 3005 3006 3007 static int tls_global_dh(struct tls_data *data, const char *dh_file) 3008 { 3009 #ifdef OPENSSL_NO_DH 3010 if (dh_file == NULL) 3011 return 0; 3012 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 3013 "dh_file specified"); 3014 return -1; 3015 #else /* OPENSSL_NO_DH */ 3016 SSL_CTX *ssl_ctx = data->ssl; 3017 DH *dh; 3018 BIO *bio; 3019 3020 /* TODO: add support for dh_blob */ 3021 if (dh_file == NULL) 3022 return 0; 3023 if (ssl_ctx == NULL) 3024 return -1; 3025 3026 bio = BIO_new_file(dh_file, "r"); 3027 if (bio == NULL) { 3028 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 3029 dh_file, ERR_error_string(ERR_get_error(), NULL)); 3030 return -1; 3031 } 3032 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 3033 BIO_free(bio); 3034 #ifndef OPENSSL_NO_DSA 3035 while (dh == NULL) { 3036 DSA *dsa; 3037 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 3038 " trying to parse as DSA params", dh_file, 3039 ERR_error_string(ERR_get_error(), NULL)); 3040 bio = BIO_new_file(dh_file, "r"); 3041 if (bio == NULL) 3042 break; 3043 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 3044 BIO_free(bio); 3045 if (!dsa) { 3046 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 3047 "'%s': %s", dh_file, 3048 ERR_error_string(ERR_get_error(), NULL)); 3049 break; 3050 } 3051 3052 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 3053 dh = DSA_dup_DH(dsa); 3054 DSA_free(dsa); 3055 if (dh == NULL) { 3056 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 3057 "params into DH params"); 3058 break; 3059 } 3060 break; 3061 } 3062 #endif /* !OPENSSL_NO_DSA */ 3063 if (dh == NULL) { 3064 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 3065 "'%s'", dh_file); 3066 return -1; 3067 } 3068 3069 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) { 3070 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 3071 "%s", dh_file, 3072 ERR_error_string(ERR_get_error(), NULL)); 3073 DH_free(dh); 3074 return -1; 3075 } 3076 DH_free(dh); 3077 return 0; 3078 #endif /* OPENSSL_NO_DH */ 3079 } 3080 3081 3082 int tls_connection_get_random(void *ssl_ctx, struct tls_connection *conn, 3083 struct tls_random *keys) 3084 { 3085 SSL *ssl; 3086 3087 if (conn == NULL || keys == NULL) 3088 return -1; 3089 ssl = conn->ssl; 3090 if (ssl == NULL) 3091 return -1; 3092 3093 os_memset(keys, 0, sizeof(*keys)); 3094 keys->client_random = conn->client_random; 3095 keys->client_random_len = SSL_get_client_random( 3096 ssl, conn->client_random, sizeof(conn->client_random)); 3097 keys->server_random = conn->server_random; 3098 keys->server_random_len = SSL_get_server_random( 3099 ssl, conn->server_random, sizeof(conn->server_random)); 3100 3101 return 0; 3102 } 3103 3104 3105 #ifdef OPENSSL_NEED_EAP_FAST_PRF 3106 static int openssl_get_keyblock_size(SSL *ssl) 3107 { 3108 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER) 3109 const EVP_CIPHER *c; 3110 const EVP_MD *h; 3111 int md_size; 3112 3113 if (ssl->enc_read_ctx == NULL || ssl->enc_read_ctx->cipher == NULL || 3114 ssl->read_hash == NULL) 3115 return -1; 3116 3117 c = ssl->enc_read_ctx->cipher; 3118 h = EVP_MD_CTX_md(ssl->read_hash); 3119 if (h) 3120 md_size = EVP_MD_size(h); 3121 else if (ssl->s3) 3122 md_size = ssl->s3->tmp.new_mac_secret_size; 3123 else 3124 return -1; 3125 3126 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d " 3127 "IV_len=%d", EVP_CIPHER_key_length(c), md_size, 3128 EVP_CIPHER_iv_length(c)); 3129 return 2 * (EVP_CIPHER_key_length(c) + 3130 md_size + 3131 EVP_CIPHER_iv_length(c)); 3132 #else 3133 const SSL_CIPHER *ssl_cipher; 3134 int cipher, digest; 3135 const EVP_CIPHER *c; 3136 const EVP_MD *h; 3137 3138 ssl_cipher = SSL_get_current_cipher(ssl); 3139 if (!ssl_cipher) 3140 return -1; 3141 cipher = SSL_CIPHER_get_cipher_nid(ssl_cipher); 3142 digest = SSL_CIPHER_get_digest_nid(ssl_cipher); 3143 wpa_printf(MSG_DEBUG, "OpenSSL: cipher nid %d digest nid %d", 3144 cipher, digest); 3145 if (cipher < 0 || digest < 0) 3146 return -1; 3147 c = EVP_get_cipherbynid(cipher); 3148 h = EVP_get_digestbynid(digest); 3149 if (!c || !h) 3150 return -1; 3151 3152 wpa_printf(MSG_DEBUG, 3153 "OpenSSL: keyblock size: key_len=%d MD_size=%d IV_len=%d", 3154 EVP_CIPHER_key_length(c), EVP_MD_size(h), 3155 EVP_CIPHER_iv_length(c)); 3156 return 2 * (EVP_CIPHER_key_length(c) + EVP_MD_size(h) + 3157 EVP_CIPHER_iv_length(c)); 3158 #endif 3159 } 3160 #endif /* OPENSSL_NEED_EAP_FAST_PRF */ 3161 3162 3163 int tls_connection_export_key(void *tls_ctx, struct tls_connection *conn, 3164 const char *label, u8 *out, size_t out_len) 3165 { 3166 if (!conn || 3167 SSL_export_keying_material(conn->ssl, out, out_len, label, 3168 os_strlen(label), NULL, 0, 0) != 1) 3169 return -1; 3170 return 0; 3171 } 3172 3173 3174 int tls_connection_get_eap_fast_key(void *tls_ctx, struct tls_connection *conn, 3175 u8 *out, size_t out_len) 3176 { 3177 #ifdef OPENSSL_NEED_EAP_FAST_PRF 3178 SSL *ssl; 3179 SSL_SESSION *sess; 3180 u8 *rnd; 3181 int ret = -1; 3182 int skip = 0; 3183 u8 *tmp_out = NULL; 3184 u8 *_out = out; 3185 unsigned char client_random[SSL3_RANDOM_SIZE]; 3186 unsigned char server_random[SSL3_RANDOM_SIZE]; 3187 unsigned char master_key[64]; 3188 size_t master_key_len; 3189 const char *ver; 3190 3191 /* 3192 * TLS library did not support EAP-FAST key generation, so get the 3193 * needed TLS session parameters and use an internal implementation of 3194 * TLS PRF to derive the key. 3195 */ 3196 3197 if (conn == NULL) 3198 return -1; 3199 ssl = conn->ssl; 3200 if (ssl == NULL) 3201 return -1; 3202 ver = SSL_get_version(ssl); 3203 sess = SSL_get_session(ssl); 3204 if (!ver || !sess) 3205 return -1; 3206 3207 skip = openssl_get_keyblock_size(ssl); 3208 if (skip < 0) 3209 return -1; 3210 tmp_out = os_malloc(skip + out_len); 3211 if (!tmp_out) 3212 return -1; 3213 _out = tmp_out; 3214 3215 rnd = os_malloc(2 * SSL3_RANDOM_SIZE); 3216 if (!rnd) { 3217 os_free(tmp_out); 3218 return -1; 3219 } 3220 3221 SSL_get_client_random(ssl, client_random, sizeof(client_random)); 3222 SSL_get_server_random(ssl, server_random, sizeof(server_random)); 3223 master_key_len = SSL_SESSION_get_master_key(sess, master_key, 3224 sizeof(master_key)); 3225 3226 os_memcpy(rnd, server_random, SSL3_RANDOM_SIZE); 3227 os_memcpy(rnd + SSL3_RANDOM_SIZE, client_random, SSL3_RANDOM_SIZE); 3228 3229 if (os_strcmp(ver, "TLSv1.2") == 0) { 3230 tls_prf_sha256(master_key, master_key_len, 3231 "key expansion", rnd, 2 * SSL3_RANDOM_SIZE, 3232 _out, skip + out_len); 3233 ret = 0; 3234 } else if (tls_prf_sha1_md5(master_key, master_key_len, 3235 "key expansion", rnd, 2 * SSL3_RANDOM_SIZE, 3236 _out, skip + out_len) == 0) { 3237 ret = 0; 3238 } 3239 os_memset(master_key, 0, sizeof(master_key)); 3240 os_free(rnd); 3241 if (ret == 0) 3242 os_memcpy(out, _out + skip, out_len); 3243 bin_clear_free(tmp_out, skip); 3244 3245 return ret; 3246 #else /* OPENSSL_NEED_EAP_FAST_PRF */ 3247 wpa_printf(MSG_ERROR, 3248 "OpenSSL: EAP-FAST keys cannot be exported in FIPS mode"); 3249 return -1; 3250 #endif /* OPENSSL_NEED_EAP_FAST_PRF */ 3251 } 3252 3253 3254 static struct wpabuf * 3255 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data, 3256 int server) 3257 { 3258 int res; 3259 struct wpabuf *out_data; 3260 3261 /* 3262 * Give TLS handshake data from the server (if available) to OpenSSL 3263 * for processing. 3264 */ 3265 if (in_data && wpabuf_len(in_data) > 0 && 3266 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data)) 3267 < 0) { 3268 tls_show_errors(MSG_INFO, __func__, 3269 "Handshake failed - BIO_write"); 3270 return NULL; 3271 } 3272 3273 /* Initiate TLS handshake or continue the existing handshake */ 3274 if (server) 3275 res = SSL_accept(conn->ssl); 3276 else 3277 res = SSL_connect(conn->ssl); 3278 if (res != 1) { 3279 int err = SSL_get_error(conn->ssl, res); 3280 if (err == SSL_ERROR_WANT_READ) 3281 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want " 3282 "more data"); 3283 else if (err == SSL_ERROR_WANT_WRITE) 3284 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to " 3285 "write"); 3286 else { 3287 tls_show_errors(MSG_INFO, __func__, "SSL_connect"); 3288 conn->failed++; 3289 } 3290 } 3291 3292 /* Get the TLS handshake data to be sent to the server */ 3293 res = BIO_ctrl_pending(conn->ssl_out); 3294 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res); 3295 out_data = wpabuf_alloc(res); 3296 if (out_data == NULL) { 3297 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for " 3298 "handshake output (%d bytes)", res); 3299 if (BIO_reset(conn->ssl_out) < 0) { 3300 tls_show_errors(MSG_INFO, __func__, 3301 "BIO_reset failed"); 3302 } 3303 return NULL; 3304 } 3305 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data), 3306 res); 3307 if (res < 0) { 3308 tls_show_errors(MSG_INFO, __func__, 3309 "Handshake failed - BIO_read"); 3310 if (BIO_reset(conn->ssl_out) < 0) { 3311 tls_show_errors(MSG_INFO, __func__, 3312 "BIO_reset failed"); 3313 } 3314 wpabuf_free(out_data); 3315 return NULL; 3316 } 3317 wpabuf_put(out_data, res); 3318 3319 return out_data; 3320 } 3321 3322 3323 static struct wpabuf * 3324 openssl_get_appl_data(struct tls_connection *conn, size_t max_len) 3325 { 3326 struct wpabuf *appl_data; 3327 int res; 3328 3329 appl_data = wpabuf_alloc(max_len + 100); 3330 if (appl_data == NULL) 3331 return NULL; 3332 3333 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data), 3334 wpabuf_size(appl_data)); 3335 if (res < 0) { 3336 int err = SSL_get_error(conn->ssl, res); 3337 if (err == SSL_ERROR_WANT_READ || 3338 err == SSL_ERROR_WANT_WRITE) { 3339 wpa_printf(MSG_DEBUG, "SSL: No Application Data " 3340 "included"); 3341 } else { 3342 tls_show_errors(MSG_INFO, __func__, 3343 "Failed to read possible " 3344 "Application Data"); 3345 } 3346 wpabuf_free(appl_data); 3347 return NULL; 3348 } 3349 3350 wpabuf_put(appl_data, res); 3351 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished " 3352 "message", appl_data); 3353 3354 return appl_data; 3355 } 3356 3357 3358 static struct wpabuf * 3359 openssl_connection_handshake(struct tls_connection *conn, 3360 const struct wpabuf *in_data, 3361 struct wpabuf **appl_data, int server) 3362 { 3363 struct wpabuf *out_data; 3364 3365 if (appl_data) 3366 *appl_data = NULL; 3367 3368 out_data = openssl_handshake(conn, in_data, server); 3369 if (out_data == NULL) 3370 return NULL; 3371 if (conn->invalid_hb_used) { 3372 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response"); 3373 wpabuf_free(out_data); 3374 return NULL; 3375 } 3376 3377 if (SSL_is_init_finished(conn->ssl)) { 3378 wpa_printf(MSG_DEBUG, 3379 "OpenSSL: Handshake finished - resumed=%d", 3380 tls_connection_resumed(conn->ssl_ctx, conn)); 3381 if (appl_data && in_data) 3382 *appl_data = openssl_get_appl_data(conn, 3383 wpabuf_len(in_data)); 3384 } 3385 3386 if (conn->invalid_hb_used) { 3387 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response"); 3388 if (appl_data) { 3389 wpabuf_free(*appl_data); 3390 *appl_data = NULL; 3391 } 3392 wpabuf_free(out_data); 3393 return NULL; 3394 } 3395 3396 return out_data; 3397 } 3398 3399 3400 struct wpabuf * 3401 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn, 3402 const struct wpabuf *in_data, 3403 struct wpabuf **appl_data) 3404 { 3405 return openssl_connection_handshake(conn, in_data, appl_data, 0); 3406 } 3407 3408 3409 struct wpabuf * tls_connection_server_handshake(void *tls_ctx, 3410 struct tls_connection *conn, 3411 const struct wpabuf *in_data, 3412 struct wpabuf **appl_data) 3413 { 3414 return openssl_connection_handshake(conn, in_data, appl_data, 1); 3415 } 3416 3417 3418 struct wpabuf * tls_connection_encrypt(void *tls_ctx, 3419 struct tls_connection *conn, 3420 const struct wpabuf *in_data) 3421 { 3422 int res; 3423 struct wpabuf *buf; 3424 3425 if (conn == NULL) 3426 return NULL; 3427 3428 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */ 3429 if ((res = BIO_reset(conn->ssl_in)) < 0 || 3430 (res = BIO_reset(conn->ssl_out)) < 0) { 3431 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 3432 return NULL; 3433 } 3434 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data)); 3435 if (res < 0) { 3436 tls_show_errors(MSG_INFO, __func__, 3437 "Encryption failed - SSL_write"); 3438 return NULL; 3439 } 3440 3441 /* Read encrypted data to be sent to the server */ 3442 buf = wpabuf_alloc(wpabuf_len(in_data) + 300); 3443 if (buf == NULL) 3444 return NULL; 3445 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf)); 3446 if (res < 0) { 3447 tls_show_errors(MSG_INFO, __func__, 3448 "Encryption failed - BIO_read"); 3449 wpabuf_free(buf); 3450 return NULL; 3451 } 3452 wpabuf_put(buf, res); 3453 3454 return buf; 3455 } 3456 3457 3458 struct wpabuf * tls_connection_decrypt(void *tls_ctx, 3459 struct tls_connection *conn, 3460 const struct wpabuf *in_data) 3461 { 3462 int res; 3463 struct wpabuf *buf; 3464 3465 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */ 3466 res = BIO_write(conn->ssl_in, wpabuf_head(in_data), 3467 wpabuf_len(in_data)); 3468 if (res < 0) { 3469 tls_show_errors(MSG_INFO, __func__, 3470 "Decryption failed - BIO_write"); 3471 return NULL; 3472 } 3473 if (BIO_reset(conn->ssl_out) < 0) { 3474 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 3475 return NULL; 3476 } 3477 3478 /* Read decrypted data for further processing */ 3479 /* 3480 * Even though we try to disable TLS compression, it is possible that 3481 * this cannot be done with all TLS libraries. Add extra buffer space 3482 * to handle the possibility of the decrypted data being longer than 3483 * input data. 3484 */ 3485 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); 3486 if (buf == NULL) 3487 return NULL; 3488 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf)); 3489 if (res < 0) { 3490 tls_show_errors(MSG_INFO, __func__, 3491 "Decryption failed - SSL_read"); 3492 wpabuf_free(buf); 3493 return NULL; 3494 } 3495 wpabuf_put(buf, res); 3496 3497 if (conn->invalid_hb_used) { 3498 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response"); 3499 wpabuf_free(buf); 3500 return NULL; 3501 } 3502 3503 return buf; 3504 } 3505 3506 3507 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) 3508 { 3509 return conn ? SSL_cache_hit(conn->ssl) : 0; 3510 } 3511 3512 3513 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, 3514 u8 *ciphers) 3515 { 3516 char buf[500], *pos, *end; 3517 u8 *c; 3518 int ret; 3519 3520 if (conn == NULL || conn->ssl == NULL || ciphers == NULL) 3521 return -1; 3522 3523 buf[0] = '\0'; 3524 pos = buf; 3525 end = pos + sizeof(buf); 3526 3527 c = ciphers; 3528 while (*c != TLS_CIPHER_NONE) { 3529 const char *suite; 3530 3531 switch (*c) { 3532 case TLS_CIPHER_RC4_SHA: 3533 suite = "RC4-SHA"; 3534 break; 3535 case TLS_CIPHER_AES128_SHA: 3536 suite = "AES128-SHA"; 3537 break; 3538 case TLS_CIPHER_RSA_DHE_AES128_SHA: 3539 suite = "DHE-RSA-AES128-SHA"; 3540 break; 3541 case TLS_CIPHER_ANON_DH_AES128_SHA: 3542 suite = "ADH-AES128-SHA"; 3543 break; 3544 case TLS_CIPHER_RSA_DHE_AES256_SHA: 3545 suite = "DHE-RSA-AES256-SHA"; 3546 break; 3547 case TLS_CIPHER_AES256_SHA: 3548 suite = "AES256-SHA"; 3549 break; 3550 default: 3551 wpa_printf(MSG_DEBUG, "TLS: Unsupported " 3552 "cipher selection: %d", *c); 3553 return -1; 3554 } 3555 ret = os_snprintf(pos, end - pos, ":%s", suite); 3556 if (os_snprintf_error(end - pos, ret)) 3557 break; 3558 pos += ret; 3559 3560 c++; 3561 } 3562 3563 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1); 3564 3565 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER) 3566 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 3567 if (os_strstr(buf, ":ADH-")) { 3568 /* 3569 * Need to drop to security level 0 to allow anonymous 3570 * cipher suites for EAP-FAST. 3571 */ 3572 SSL_set_security_level(conn->ssl, 0); 3573 } else if (SSL_get_security_level(conn->ssl) == 0) { 3574 /* Force at least security level 1 */ 3575 SSL_set_security_level(conn->ssl, 1); 3576 } 3577 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 3578 #endif 3579 3580 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) { 3581 tls_show_errors(MSG_INFO, __func__, 3582 "Cipher suite configuration failed"); 3583 return -1; 3584 } 3585 3586 return 0; 3587 } 3588 3589 3590 int tls_get_version(void *ssl_ctx, struct tls_connection *conn, 3591 char *buf, size_t buflen) 3592 { 3593 const char *name; 3594 if (conn == NULL || conn->ssl == NULL) 3595 return -1; 3596 3597 name = SSL_get_version(conn->ssl); 3598 if (name == NULL) 3599 return -1; 3600 3601 os_strlcpy(buf, name, buflen); 3602 return 0; 3603 } 3604 3605 3606 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, 3607 char *buf, size_t buflen) 3608 { 3609 const char *name; 3610 if (conn == NULL || conn->ssl == NULL) 3611 return -1; 3612 3613 name = SSL_get_cipher(conn->ssl); 3614 if (name == NULL) 3615 return -1; 3616 3617 os_strlcpy(buf, name, buflen); 3618 return 0; 3619 } 3620 3621 3622 int tls_connection_enable_workaround(void *ssl_ctx, 3623 struct tls_connection *conn) 3624 { 3625 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); 3626 3627 return 0; 3628 } 3629 3630 3631 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 3632 /* ClientHello TLS extensions require a patch to openssl, so this function is 3633 * commented out unless explicitly needed for EAP-FAST in order to be able to 3634 * build this file with unmodified openssl. */ 3635 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, 3636 int ext_type, const u8 *data, 3637 size_t data_len) 3638 { 3639 if (conn == NULL || conn->ssl == NULL || ext_type != 35) 3640 return -1; 3641 3642 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data, 3643 data_len) != 1) 3644 return -1; 3645 3646 return 0; 3647 } 3648 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 3649 3650 3651 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) 3652 { 3653 if (conn == NULL) 3654 return -1; 3655 return conn->failed; 3656 } 3657 3658 3659 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) 3660 { 3661 if (conn == NULL) 3662 return -1; 3663 return conn->read_alerts; 3664 } 3665 3666 3667 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) 3668 { 3669 if (conn == NULL) 3670 return -1; 3671 return conn->write_alerts; 3672 } 3673 3674 3675 #ifdef HAVE_OCSP 3676 3677 static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp) 3678 { 3679 #ifndef CONFIG_NO_STDOUT_DEBUG 3680 BIO *out; 3681 size_t rlen; 3682 char *txt; 3683 int res; 3684 3685 if (wpa_debug_level > MSG_DEBUG) 3686 return; 3687 3688 out = BIO_new(BIO_s_mem()); 3689 if (!out) 3690 return; 3691 3692 OCSP_RESPONSE_print(out, rsp, 0); 3693 rlen = BIO_ctrl_pending(out); 3694 txt = os_malloc(rlen + 1); 3695 if (!txt) { 3696 BIO_free(out); 3697 return; 3698 } 3699 3700 res = BIO_read(out, txt, rlen); 3701 if (res > 0) { 3702 txt[res] = '\0'; 3703 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt); 3704 } 3705 os_free(txt); 3706 BIO_free(out); 3707 #endif /* CONFIG_NO_STDOUT_DEBUG */ 3708 } 3709 3710 3711 static void debug_print_cert(X509 *cert, const char *title) 3712 { 3713 #ifndef CONFIG_NO_STDOUT_DEBUG 3714 BIO *out; 3715 size_t rlen; 3716 char *txt; 3717 int res; 3718 3719 if (wpa_debug_level > MSG_DEBUG) 3720 return; 3721 3722 out = BIO_new(BIO_s_mem()); 3723 if (!out) 3724 return; 3725 3726 X509_print(out, cert); 3727 rlen = BIO_ctrl_pending(out); 3728 txt = os_malloc(rlen + 1); 3729 if (!txt) { 3730 BIO_free(out); 3731 return; 3732 } 3733 3734 res = BIO_read(out, txt, rlen); 3735 if (res > 0) { 3736 txt[res] = '\0'; 3737 wpa_printf(MSG_DEBUG, "OpenSSL: %s\n%s", title, txt); 3738 } 3739 os_free(txt); 3740 3741 BIO_free(out); 3742 #endif /* CONFIG_NO_STDOUT_DEBUG */ 3743 } 3744 3745 3746 static int ocsp_resp_cb(SSL *s, void *arg) 3747 { 3748 struct tls_connection *conn = arg; 3749 const unsigned char *p; 3750 int len, status, reason; 3751 OCSP_RESPONSE *rsp; 3752 OCSP_BASICRESP *basic; 3753 OCSP_CERTID *id; 3754 ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update; 3755 X509_STORE *store; 3756 STACK_OF(X509) *certs = NULL; 3757 3758 len = SSL_get_tlsext_status_ocsp_resp(s, &p); 3759 if (!p) { 3760 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received"); 3761 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1; 3762 } 3763 3764 wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len); 3765 3766 rsp = d2i_OCSP_RESPONSE(NULL, &p, len); 3767 if (!rsp) { 3768 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response"); 3769 return 0; 3770 } 3771 3772 ocsp_debug_print_resp(rsp); 3773 3774 status = OCSP_response_status(rsp); 3775 if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) { 3776 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)", 3777 status, OCSP_response_status_str(status)); 3778 return 0; 3779 } 3780 3781 basic = OCSP_response_get1_basic(rsp); 3782 if (!basic) { 3783 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse"); 3784 return 0; 3785 } 3786 3787 store = SSL_CTX_get_cert_store(conn->ssl_ctx); 3788 if (conn->peer_issuer) { 3789 debug_print_cert(conn->peer_issuer, "Add OCSP issuer"); 3790 3791 if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) { 3792 tls_show_errors(MSG_INFO, __func__, 3793 "OpenSSL: Could not add issuer to certificate store"); 3794 } 3795 certs = sk_X509_new_null(); 3796 if (certs) { 3797 X509 *cert; 3798 cert = X509_dup(conn->peer_issuer); 3799 if (cert && !sk_X509_push(certs, cert)) { 3800 tls_show_errors( 3801 MSG_INFO, __func__, 3802 "OpenSSL: Could not add issuer to OCSP responder trust store"); 3803 X509_free(cert); 3804 sk_X509_free(certs); 3805 certs = NULL; 3806 } 3807 if (certs && conn->peer_issuer_issuer) { 3808 cert = X509_dup(conn->peer_issuer_issuer); 3809 if (cert && !sk_X509_push(certs, cert)) { 3810 tls_show_errors( 3811 MSG_INFO, __func__, 3812 "OpenSSL: Could not add issuer's issuer to OCSP responder trust store"); 3813 X509_free(cert); 3814 } 3815 } 3816 } 3817 } 3818 3819 status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER); 3820 sk_X509_pop_free(certs, X509_free); 3821 if (status <= 0) { 3822 tls_show_errors(MSG_INFO, __func__, 3823 "OpenSSL: OCSP response failed verification"); 3824 OCSP_BASICRESP_free(basic); 3825 OCSP_RESPONSE_free(rsp); 3826 return 0; 3827 } 3828 3829 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded"); 3830 3831 if (!conn->peer_cert) { 3832 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check"); 3833 OCSP_BASICRESP_free(basic); 3834 OCSP_RESPONSE_free(rsp); 3835 return 0; 3836 } 3837 3838 if (!conn->peer_issuer) { 3839 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check"); 3840 OCSP_BASICRESP_free(basic); 3841 OCSP_RESPONSE_free(rsp); 3842 return 0; 3843 } 3844 3845 id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer); 3846 if (!id) { 3847 wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier"); 3848 OCSP_BASICRESP_free(basic); 3849 OCSP_RESPONSE_free(rsp); 3850 return 0; 3851 } 3852 3853 if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at, 3854 &this_update, &next_update)) { 3855 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s", 3856 (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" : 3857 " (OCSP not required)"); 3858 OCSP_CERTID_free(id); 3859 OCSP_BASICRESP_free(basic); 3860 OCSP_RESPONSE_free(rsp); 3861 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1; 3862 } 3863 OCSP_CERTID_free(id); 3864 3865 if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) { 3866 tls_show_errors(MSG_INFO, __func__, 3867 "OpenSSL: OCSP status times invalid"); 3868 OCSP_BASICRESP_free(basic); 3869 OCSP_RESPONSE_free(rsp); 3870 return 0; 3871 } 3872 3873 OCSP_BASICRESP_free(basic); 3874 OCSP_RESPONSE_free(rsp); 3875 3876 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s", 3877 OCSP_cert_status_str(status)); 3878 3879 if (status == V_OCSP_CERTSTATUS_GOOD) 3880 return 1; 3881 if (status == V_OCSP_CERTSTATUS_REVOKED) 3882 return 0; 3883 if (conn->flags & TLS_CONN_REQUIRE_OCSP) { 3884 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required"); 3885 return 0; 3886 } 3887 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue"); 3888 return 1; 3889 } 3890 3891 3892 static int ocsp_status_cb(SSL *s, void *arg) 3893 { 3894 char *tmp; 3895 char *resp; 3896 size_t len; 3897 3898 if (tls_global->ocsp_stapling_response == NULL) { 3899 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured"); 3900 return SSL_TLSEXT_ERR_OK; 3901 } 3902 3903 resp = os_readfile(tls_global->ocsp_stapling_response, &len); 3904 if (resp == NULL) { 3905 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file"); 3906 /* TODO: Build OCSPResponse with responseStatus = internalError 3907 */ 3908 return SSL_TLSEXT_ERR_OK; 3909 } 3910 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response"); 3911 tmp = OPENSSL_malloc(len); 3912 if (tmp == NULL) { 3913 os_free(resp); 3914 return SSL_TLSEXT_ERR_ALERT_FATAL; 3915 } 3916 3917 os_memcpy(tmp, resp, len); 3918 os_free(resp); 3919 SSL_set_tlsext_status_ocsp_resp(s, tmp, len); 3920 3921 return SSL_TLSEXT_ERR_OK; 3922 } 3923 3924 #endif /* HAVE_OCSP */ 3925 3926 3927 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 3928 const struct tls_connection_params *params) 3929 { 3930 struct tls_data *data = tls_ctx; 3931 int ret; 3932 unsigned long err; 3933 int can_pkcs11 = 0; 3934 const char *key_id = params->key_id; 3935 const char *cert_id = params->cert_id; 3936 const char *ca_cert_id = params->ca_cert_id; 3937 const char *engine_id = params->engine ? params->engine_id : NULL; 3938 3939 if (conn == NULL) 3940 return -1; 3941 3942 if (params->flags & TLS_CONN_REQUIRE_OCSP_ALL) { 3943 wpa_printf(MSG_INFO, 3944 "OpenSSL: ocsp=3 not supported"); 3945 return -1; 3946 } 3947 3948 /* 3949 * If the engine isn't explicitly configured, and any of the 3950 * cert/key fields are actually PKCS#11 URIs, then automatically 3951 * use the PKCS#11 ENGINE. 3952 */ 3953 if (!engine_id || os_strcmp(engine_id, "pkcs11") == 0) 3954 can_pkcs11 = 1; 3955 3956 if (!key_id && params->private_key && can_pkcs11 && 3957 os_strncmp(params->private_key, "pkcs11:", 7) == 0) { 3958 can_pkcs11 = 2; 3959 key_id = params->private_key; 3960 } 3961 3962 if (!cert_id && params->client_cert && can_pkcs11 && 3963 os_strncmp(params->client_cert, "pkcs11:", 7) == 0) { 3964 can_pkcs11 = 2; 3965 cert_id = params->client_cert; 3966 } 3967 3968 if (!ca_cert_id && params->ca_cert && can_pkcs11 && 3969 os_strncmp(params->ca_cert, "pkcs11:", 7) == 0) { 3970 can_pkcs11 = 2; 3971 ca_cert_id = params->ca_cert; 3972 } 3973 3974 /* If we need to automatically enable the PKCS#11 ENGINE, do so. */ 3975 if (can_pkcs11 == 2 && !engine_id) 3976 engine_id = "pkcs11"; 3977 3978 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 3979 #if OPENSSL_VERSION_NUMBER < 0x10100000L 3980 if (params->flags & TLS_CONN_EAP_FAST) { 3981 wpa_printf(MSG_DEBUG, 3982 "OpenSSL: Use TLSv1_method() for EAP-FAST"); 3983 if (SSL_set_ssl_method(conn->ssl, TLSv1_method()) != 1) { 3984 tls_show_errors(MSG_INFO, __func__, 3985 "Failed to set TLSv1_method() for EAP-FAST"); 3986 return -1; 3987 } 3988 } 3989 #endif 3990 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 3991 3992 while ((err = ERR_get_error())) { 3993 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 3994 __func__, ERR_error_string(err, NULL)); 3995 } 3996 3997 if (engine_id) { 3998 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine"); 3999 ret = tls_engine_init(conn, engine_id, params->pin, 4000 key_id, cert_id, ca_cert_id); 4001 if (ret) 4002 return ret; 4003 } 4004 if (tls_connection_set_subject_match(conn, 4005 params->subject_match, 4006 params->altsubject_match, 4007 params->suffix_match, 4008 params->domain_match)) 4009 return -1; 4010 4011 if (engine_id && ca_cert_id) { 4012 if (tls_connection_engine_ca_cert(data, conn, ca_cert_id)) 4013 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 4014 } else if (tls_connection_ca_cert(data, conn, params->ca_cert, 4015 params->ca_cert_blob, 4016 params->ca_cert_blob_len, 4017 params->ca_path)) 4018 return -1; 4019 4020 if (engine_id && cert_id) { 4021 if (tls_connection_engine_client_cert(conn, cert_id)) 4022 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 4023 } else if (tls_connection_client_cert(conn, params->client_cert, 4024 params->client_cert_blob, 4025 params->client_cert_blob_len)) 4026 return -1; 4027 4028 if (engine_id && key_id) { 4029 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine"); 4030 if (tls_connection_engine_private_key(conn)) 4031 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 4032 } else if (tls_connection_private_key(data, conn, 4033 params->private_key, 4034 params->private_key_passwd, 4035 params->private_key_blob, 4036 params->private_key_blob_len)) { 4037 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'", 4038 params->private_key); 4039 return -1; 4040 } 4041 4042 if (tls_connection_dh(conn, params->dh_file)) { 4043 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 4044 params->dh_file); 4045 return -1; 4046 } 4047 4048 if (params->openssl_ciphers && 4049 SSL_set_cipher_list(conn->ssl, params->openssl_ciphers) != 1) { 4050 wpa_printf(MSG_INFO, 4051 "OpenSSL: Failed to set cipher string '%s'", 4052 params->openssl_ciphers); 4053 return -1; 4054 } 4055 4056 tls_set_conn_flags(conn->ssl, params->flags); 4057 4058 #ifdef OPENSSL_IS_BORINGSSL 4059 if (params->flags & TLS_CONN_REQUEST_OCSP) { 4060 SSL_enable_ocsp_stapling(conn->ssl); 4061 } 4062 #else /* OPENSSL_IS_BORINGSSL */ 4063 #ifdef HAVE_OCSP 4064 if (params->flags & TLS_CONN_REQUEST_OCSP) { 4065 SSL_CTX *ssl_ctx = data->ssl; 4066 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp); 4067 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb); 4068 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn); 4069 } 4070 #else /* HAVE_OCSP */ 4071 if (params->flags & TLS_CONN_REQUIRE_OCSP) { 4072 wpa_printf(MSG_INFO, 4073 "OpenSSL: No OCSP support included - reject configuration"); 4074 return -1; 4075 } 4076 if (params->flags & TLS_CONN_REQUEST_OCSP) { 4077 wpa_printf(MSG_DEBUG, 4078 "OpenSSL: No OCSP support included - allow optional OCSP case to continue"); 4079 } 4080 #endif /* HAVE_OCSP */ 4081 #endif /* OPENSSL_IS_BORINGSSL */ 4082 4083 conn->flags = params->flags; 4084 4085 tls_get_errors(data); 4086 4087 return 0; 4088 } 4089 4090 4091 int tls_global_set_params(void *tls_ctx, 4092 const struct tls_connection_params *params) 4093 { 4094 struct tls_data *data = tls_ctx; 4095 SSL_CTX *ssl_ctx = data->ssl; 4096 unsigned long err; 4097 4098 while ((err = ERR_get_error())) { 4099 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 4100 __func__, ERR_error_string(err, NULL)); 4101 } 4102 4103 if (tls_global_ca_cert(data, params->ca_cert) || 4104 tls_global_client_cert(data, params->client_cert) || 4105 tls_global_private_key(data, params->private_key, 4106 params->private_key_passwd) || 4107 tls_global_dh(data, params->dh_file)) { 4108 wpa_printf(MSG_INFO, "TLS: Failed to set global parameters"); 4109 return -1; 4110 } 4111 4112 if (params->openssl_ciphers && 4113 SSL_CTX_set_cipher_list(ssl_ctx, params->openssl_ciphers) != 1) { 4114 wpa_printf(MSG_INFO, 4115 "OpenSSL: Failed to set cipher string '%s'", 4116 params->openssl_ciphers); 4117 return -1; 4118 } 4119 4120 #ifdef SSL_OP_NO_TICKET 4121 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) 4122 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET); 4123 #ifdef SSL_CTX_clear_options 4124 else 4125 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET); 4126 #endif /* SSL_clear_options */ 4127 #endif /* SSL_OP_NO_TICKET */ 4128 4129 #ifdef HAVE_OCSP 4130 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb); 4131 SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx); 4132 os_free(tls_global->ocsp_stapling_response); 4133 if (params->ocsp_stapling_response) 4134 tls_global->ocsp_stapling_response = 4135 os_strdup(params->ocsp_stapling_response); 4136 else 4137 tls_global->ocsp_stapling_response = NULL; 4138 #endif /* HAVE_OCSP */ 4139 4140 return 0; 4141 } 4142 4143 4144 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 4145 /* Pre-shared secred requires a patch to openssl, so this function is 4146 * commented out unless explicitly needed for EAP-FAST in order to be able to 4147 * build this file with unmodified openssl. */ 4148 4149 #if (defined(OPENSSL_IS_BORINGSSL) || OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER) 4150 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, 4151 STACK_OF(SSL_CIPHER) *peer_ciphers, 4152 const SSL_CIPHER **cipher, void *arg) 4153 #else /* OPENSSL_IS_BORINGSSL */ 4154 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, 4155 STACK_OF(SSL_CIPHER) *peer_ciphers, 4156 SSL_CIPHER **cipher, void *arg) 4157 #endif /* OPENSSL_IS_BORINGSSL */ 4158 { 4159 struct tls_connection *conn = arg; 4160 int ret; 4161 4162 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER) 4163 if (conn == NULL || conn->session_ticket_cb == NULL) 4164 return 0; 4165 4166 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, 4167 conn->session_ticket, 4168 conn->session_ticket_len, 4169 s->s3->client_random, 4170 s->s3->server_random, secret); 4171 #else 4172 unsigned char client_random[SSL3_RANDOM_SIZE]; 4173 unsigned char server_random[SSL3_RANDOM_SIZE]; 4174 4175 if (conn == NULL || conn->session_ticket_cb == NULL) 4176 return 0; 4177 4178 SSL_get_client_random(s, client_random, sizeof(client_random)); 4179 SSL_get_server_random(s, server_random, sizeof(server_random)); 4180 4181 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, 4182 conn->session_ticket, 4183 conn->session_ticket_len, 4184 client_random, 4185 server_random, secret); 4186 #endif 4187 4188 os_free(conn->session_ticket); 4189 conn->session_ticket = NULL; 4190 4191 if (ret <= 0) 4192 return 0; 4193 4194 *secret_len = SSL_MAX_MASTER_KEY_LENGTH; 4195 return 1; 4196 } 4197 4198 4199 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data, 4200 int len, void *arg) 4201 { 4202 struct tls_connection *conn = arg; 4203 4204 if (conn == NULL || conn->session_ticket_cb == NULL) 4205 return 0; 4206 4207 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len); 4208 4209 os_free(conn->session_ticket); 4210 conn->session_ticket = NULL; 4211 4212 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 4213 "extension", data, len); 4214 4215 conn->session_ticket = os_malloc(len); 4216 if (conn->session_ticket == NULL) 4217 return 0; 4218 4219 os_memcpy(conn->session_ticket, data, len); 4220 conn->session_ticket_len = len; 4221 4222 return 1; 4223 } 4224 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 4225 4226 4227 int tls_connection_set_session_ticket_cb(void *tls_ctx, 4228 struct tls_connection *conn, 4229 tls_session_ticket_cb cb, 4230 void *ctx) 4231 { 4232 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 4233 conn->session_ticket_cb = cb; 4234 conn->session_ticket_cb_ctx = ctx; 4235 4236 if (cb) { 4237 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb, 4238 conn) != 1) 4239 return -1; 4240 SSL_set_session_ticket_ext_cb(conn->ssl, 4241 tls_session_ticket_ext_cb, conn); 4242 } else { 4243 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1) 4244 return -1; 4245 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL); 4246 } 4247 4248 return 0; 4249 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 4250 return -1; 4251 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 4252 } 4253 4254 4255 int tls_get_library_version(char *buf, size_t buf_len) 4256 { 4257 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER) 4258 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s", 4259 OPENSSL_VERSION_TEXT, 4260 OpenSSL_version(OPENSSL_VERSION)); 4261 #else 4262 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s", 4263 OPENSSL_VERSION_TEXT, 4264 SSLeay_version(SSLEAY_VERSION)); 4265 #endif 4266 } 4267 4268 4269 void tls_connection_set_success_data(struct tls_connection *conn, 4270 struct wpabuf *data) 4271 { 4272 SSL_SESSION *sess; 4273 struct wpabuf *old; 4274 4275 if (tls_ex_idx_session < 0) 4276 goto fail; 4277 sess = SSL_get_session(conn->ssl); 4278 if (!sess) 4279 goto fail; 4280 old = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session); 4281 if (old) { 4282 wpa_printf(MSG_DEBUG, "OpenSSL: Replacing old success data %p", 4283 old); 4284 wpabuf_free(old); 4285 } 4286 if (SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, data) != 1) 4287 goto fail; 4288 4289 wpa_printf(MSG_DEBUG, "OpenSSL: Stored success data %p", data); 4290 conn->success_data = 1; 4291 return; 4292 4293 fail: 4294 wpa_printf(MSG_INFO, "OpenSSL: Failed to store success data"); 4295 wpabuf_free(data); 4296 } 4297 4298 4299 void tls_connection_set_success_data_resumed(struct tls_connection *conn) 4300 { 4301 wpa_printf(MSG_DEBUG, 4302 "OpenSSL: Success data accepted for resumed session"); 4303 conn->success_data = 1; 4304 } 4305 4306 4307 const struct wpabuf * 4308 tls_connection_get_success_data(struct tls_connection *conn) 4309 { 4310 SSL_SESSION *sess; 4311 4312 if (tls_ex_idx_session < 0 || 4313 !(sess = SSL_get_session(conn->ssl))) 4314 return NULL; 4315 return SSL_SESSION_get_ex_data(sess, tls_ex_idx_session); 4316 } 4317 4318 4319 void tls_connection_remove_session(struct tls_connection *conn) 4320 { 4321 SSL_SESSION *sess; 4322 4323 sess = SSL_get_session(conn->ssl); 4324 if (!sess) 4325 return; 4326 4327 if (SSL_CTX_remove_session(conn->ssl_ctx, sess) != 1) 4328 wpa_printf(MSG_DEBUG, 4329 "OpenSSL: Session was not cached"); 4330 else 4331 wpa_printf(MSG_DEBUG, 4332 "OpenSSL: Removed cached session to disable session resumption"); 4333 } 4334