1 /* 2 * SSL/TLS interface functions for OpenSSL 3 * Copyright (c) 2004-2011, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #ifndef CONFIG_SMARTCARD 12 #ifndef OPENSSL_NO_ENGINE 13 #ifndef ANDROID 14 #define OPENSSL_NO_ENGINE 15 #endif 16 #endif 17 #endif 18 19 #include <openssl/ssl.h> 20 #include <openssl/err.h> 21 #include <openssl/pkcs12.h> 22 #include <openssl/x509v3.h> 23 #ifndef OPENSSL_NO_ENGINE 24 #include <openssl/engine.h> 25 #endif /* OPENSSL_NO_ENGINE */ 26 27 #ifdef ANDROID 28 #include <openssl/pem.h> 29 #include "keystore_get.h" 30 #endif /* ANDROID */ 31 32 #include "common.h" 33 #include "crypto.h" 34 #include "tls.h" 35 36 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL 37 #define OPENSSL_d2i_TYPE const unsigned char ** 38 #else 39 #define OPENSSL_d2i_TYPE unsigned char ** 40 #endif 41 42 #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT 43 #ifdef SSL_OP_NO_TICKET 44 /* 45 * Session ticket override patch was merged into OpenSSL 0.9.9 tree on 46 * 2008-11-15. This version uses a bit different API compared to the old patch. 47 */ 48 #define CONFIG_OPENSSL_TICKET_OVERRIDE 49 #endif 50 #endif 51 52 static int tls_openssl_ref_count = 0; 53 54 struct tls_global { 55 void (*event_cb)(void *ctx, enum tls_event ev, 56 union tls_event_data *data); 57 void *cb_ctx; 58 int cert_in_cb; 59 }; 60 61 static struct tls_global *tls_global = NULL; 62 63 64 struct tls_connection { 65 SSL *ssl; 66 BIO *ssl_in, *ssl_out; 67 #ifndef OPENSSL_NO_ENGINE 68 ENGINE *engine; /* functional reference to the engine */ 69 EVP_PKEY *private_key; /* the private key if using engine */ 70 #endif /* OPENSSL_NO_ENGINE */ 71 char *subject_match, *altsubject_match; 72 int read_alerts, write_alerts, failed; 73 74 tls_session_ticket_cb session_ticket_cb; 75 void *session_ticket_cb_ctx; 76 77 /* SessionTicket received from OpenSSL hello_extension_cb (server) */ 78 u8 *session_ticket; 79 size_t session_ticket_len; 80 81 unsigned int ca_cert_verify:1; 82 unsigned int cert_probe:1; 83 unsigned int server_cert_only:1; 84 85 u8 srv_cert_hash[32]; 86 87 unsigned int flags; 88 }; 89 90 91 #ifdef CONFIG_NO_STDOUT_DEBUG 92 93 static void _tls_show_errors(void) 94 { 95 unsigned long err; 96 97 while ((err = ERR_get_error())) { 98 /* Just ignore the errors, since stdout is disabled */ 99 } 100 } 101 #define tls_show_errors(l, f, t) _tls_show_errors() 102 103 #else /* CONFIG_NO_STDOUT_DEBUG */ 104 105 static void tls_show_errors(int level, const char *func, const char *txt) 106 { 107 unsigned long err; 108 109 wpa_printf(level, "OpenSSL: %s - %s %s", 110 func, txt, ERR_error_string(ERR_get_error(), NULL)); 111 112 while ((err = ERR_get_error())) { 113 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s", 114 ERR_error_string(err, NULL)); 115 } 116 } 117 118 #endif /* CONFIG_NO_STDOUT_DEBUG */ 119 120 121 #ifdef CONFIG_NATIVE_WINDOWS 122 123 /* Windows CryptoAPI and access to certificate stores */ 124 #include <wincrypt.h> 125 126 #ifdef __MINGW32_VERSION 127 /* 128 * MinGW does not yet include all the needed definitions for CryptoAPI, so 129 * define here whatever extra is needed. 130 */ 131 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16) 132 #define CERT_STORE_READONLY_FLAG 0x00008000 133 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000 134 135 #endif /* __MINGW32_VERSION */ 136 137 138 struct cryptoapi_rsa_data { 139 const CERT_CONTEXT *cert; 140 HCRYPTPROV crypt_prov; 141 DWORD key_spec; 142 BOOL free_crypt_prov; 143 }; 144 145 146 static void cryptoapi_error(const char *msg) 147 { 148 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u", 149 msg, (unsigned int) GetLastError()); 150 } 151 152 153 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from, 154 unsigned char *to, RSA *rsa, int padding) 155 { 156 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 157 return 0; 158 } 159 160 161 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from, 162 unsigned char *to, RSA *rsa, int padding) 163 { 164 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 165 return 0; 166 } 167 168 169 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from, 170 unsigned char *to, RSA *rsa, int padding) 171 { 172 struct cryptoapi_rsa_data *priv = 173 (struct cryptoapi_rsa_data *) rsa->meth->app_data; 174 HCRYPTHASH hash; 175 DWORD hash_size, len, i; 176 unsigned char *buf = NULL; 177 int ret = 0; 178 179 if (priv == NULL) { 180 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 181 ERR_R_PASSED_NULL_PARAMETER); 182 return 0; 183 } 184 185 if (padding != RSA_PKCS1_PADDING) { 186 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 187 RSA_R_UNKNOWN_PADDING_TYPE); 188 return 0; 189 } 190 191 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) { 192 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported", 193 __func__); 194 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 195 RSA_R_INVALID_MESSAGE_LENGTH); 196 return 0; 197 } 198 199 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash)) 200 { 201 cryptoapi_error("CryptCreateHash failed"); 202 return 0; 203 } 204 205 len = sizeof(hash_size); 206 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len, 207 0)) { 208 cryptoapi_error("CryptGetHashParam failed"); 209 goto err; 210 } 211 212 if ((int) hash_size != flen) { 213 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)", 214 (unsigned) hash_size, flen); 215 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, 216 RSA_R_INVALID_MESSAGE_LENGTH); 217 goto err; 218 } 219 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) { 220 cryptoapi_error("CryptSetHashParam failed"); 221 goto err; 222 } 223 224 len = RSA_size(rsa); 225 buf = os_malloc(len); 226 if (buf == NULL) { 227 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE); 228 goto err; 229 } 230 231 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) { 232 cryptoapi_error("CryptSignHash failed"); 233 goto err; 234 } 235 236 for (i = 0; i < len; i++) 237 to[i] = buf[len - i - 1]; 238 ret = len; 239 240 err: 241 os_free(buf); 242 CryptDestroyHash(hash); 243 244 return ret; 245 } 246 247 248 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from, 249 unsigned char *to, RSA *rsa, int padding) 250 { 251 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); 252 return 0; 253 } 254 255 256 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv) 257 { 258 if (priv == NULL) 259 return; 260 if (priv->crypt_prov && priv->free_crypt_prov) 261 CryptReleaseContext(priv->crypt_prov, 0); 262 if (priv->cert) 263 CertFreeCertificateContext(priv->cert); 264 os_free(priv); 265 } 266 267 268 static int cryptoapi_finish(RSA *rsa) 269 { 270 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data); 271 os_free((void *) rsa->meth); 272 rsa->meth = NULL; 273 return 1; 274 } 275 276 277 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store) 278 { 279 HCERTSTORE cs; 280 const CERT_CONTEXT *ret = NULL; 281 282 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0, 283 store | CERT_STORE_OPEN_EXISTING_FLAG | 284 CERT_STORE_READONLY_FLAG, L"MY"); 285 if (cs == NULL) { 286 cryptoapi_error("Failed to open 'My system store'"); 287 return NULL; 288 } 289 290 if (strncmp(name, "cert://", 7) == 0) { 291 unsigned short wbuf[255]; 292 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255); 293 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING | 294 PKCS_7_ASN_ENCODING, 295 0, CERT_FIND_SUBJECT_STR, 296 wbuf, NULL); 297 } else if (strncmp(name, "hash://", 7) == 0) { 298 CRYPT_HASH_BLOB blob; 299 int len; 300 const char *hash = name + 7; 301 unsigned char *buf; 302 303 len = os_strlen(hash) / 2; 304 buf = os_malloc(len); 305 if (buf && hexstr2bin(hash, buf, len) == 0) { 306 blob.cbData = len; 307 blob.pbData = buf; 308 ret = CertFindCertificateInStore(cs, 309 X509_ASN_ENCODING | 310 PKCS_7_ASN_ENCODING, 311 0, CERT_FIND_HASH, 312 &blob, NULL); 313 } 314 os_free(buf); 315 } 316 317 CertCloseStore(cs, 0); 318 319 return ret; 320 } 321 322 323 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 324 { 325 X509 *cert = NULL; 326 RSA *rsa = NULL, *pub_rsa; 327 struct cryptoapi_rsa_data *priv; 328 RSA_METHOD *rsa_meth; 329 330 if (name == NULL || 331 (strncmp(name, "cert://", 7) != 0 && 332 strncmp(name, "hash://", 7) != 0)) 333 return -1; 334 335 priv = os_zalloc(sizeof(*priv)); 336 rsa_meth = os_zalloc(sizeof(*rsa_meth)); 337 if (priv == NULL || rsa_meth == NULL) { 338 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory " 339 "for CryptoAPI RSA method"); 340 os_free(priv); 341 os_free(rsa_meth); 342 return -1; 343 } 344 345 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER); 346 if (priv->cert == NULL) { 347 priv->cert = cryptoapi_find_cert( 348 name, CERT_SYSTEM_STORE_LOCAL_MACHINE); 349 } 350 if (priv->cert == NULL) { 351 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate " 352 "'%s'", name); 353 goto err; 354 } 355 356 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded, 357 priv->cert->cbCertEncoded); 358 if (cert == NULL) { 359 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER " 360 "encoding"); 361 goto err; 362 } 363 364 if (!CryptAcquireCertificatePrivateKey(priv->cert, 365 CRYPT_ACQUIRE_COMPARE_KEY_FLAG, 366 NULL, &priv->crypt_prov, 367 &priv->key_spec, 368 &priv->free_crypt_prov)) { 369 cryptoapi_error("Failed to acquire a private key for the " 370 "certificate"); 371 goto err; 372 } 373 374 rsa_meth->name = "Microsoft CryptoAPI RSA Method"; 375 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc; 376 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec; 377 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc; 378 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec; 379 rsa_meth->finish = cryptoapi_finish; 380 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK; 381 rsa_meth->app_data = (char *) priv; 382 383 rsa = RSA_new(); 384 if (rsa == NULL) { 385 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, 386 ERR_R_MALLOC_FAILURE); 387 goto err; 388 } 389 390 if (!SSL_use_certificate(ssl, cert)) { 391 RSA_free(rsa); 392 rsa = NULL; 393 goto err; 394 } 395 pub_rsa = cert->cert_info->key->pkey->pkey.rsa; 396 X509_free(cert); 397 cert = NULL; 398 399 rsa->n = BN_dup(pub_rsa->n); 400 rsa->e = BN_dup(pub_rsa->e); 401 if (!RSA_set_method(rsa, rsa_meth)) 402 goto err; 403 404 if (!SSL_use_RSAPrivateKey(ssl, rsa)) 405 goto err; 406 RSA_free(rsa); 407 408 return 0; 409 410 err: 411 if (cert) 412 X509_free(cert); 413 if (rsa) 414 RSA_free(rsa); 415 else { 416 os_free(rsa_meth); 417 cryptoapi_free_data(priv); 418 } 419 return -1; 420 } 421 422 423 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name) 424 { 425 HCERTSTORE cs; 426 PCCERT_CONTEXT ctx = NULL; 427 X509 *cert; 428 char buf[128]; 429 const char *store; 430 #ifdef UNICODE 431 WCHAR *wstore; 432 #endif /* UNICODE */ 433 434 if (name == NULL || strncmp(name, "cert_store://", 13) != 0) 435 return -1; 436 437 store = name + 13; 438 #ifdef UNICODE 439 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR)); 440 if (wstore == NULL) 441 return -1; 442 wsprintf(wstore, L"%S", store); 443 cs = CertOpenSystemStore(0, wstore); 444 os_free(wstore); 445 #else /* UNICODE */ 446 cs = CertOpenSystemStore(0, store); 447 #endif /* UNICODE */ 448 if (cs == NULL) { 449 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store " 450 "'%s': error=%d", __func__, store, 451 (int) GetLastError()); 452 return -1; 453 } 454 455 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) { 456 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded, 457 ctx->cbCertEncoded); 458 if (cert == NULL) { 459 wpa_printf(MSG_INFO, "CryptoAPI: Could not process " 460 "X509 DER encoding for CA cert"); 461 continue; 462 } 463 464 X509_NAME_oneline(X509_get_subject_name(cert), buf, 465 sizeof(buf)); 466 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for " 467 "system certificate store: subject='%s'", buf); 468 469 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 470 tls_show_errors(MSG_WARNING, __func__, 471 "Failed to add ca_cert to OpenSSL " 472 "certificate store"); 473 } 474 475 X509_free(cert); 476 } 477 478 if (!CertCloseStore(cs, 0)) { 479 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store " 480 "'%s': error=%d", __func__, name + 13, 481 (int) GetLastError()); 482 } 483 484 return 0; 485 } 486 487 488 #else /* CONFIG_NATIVE_WINDOWS */ 489 490 static int tls_cryptoapi_cert(SSL *ssl, const char *name) 491 { 492 return -1; 493 } 494 495 #endif /* CONFIG_NATIVE_WINDOWS */ 496 497 498 static void ssl_info_cb(const SSL *ssl, int where, int ret) 499 { 500 const char *str; 501 int w; 502 503 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret); 504 w = where & ~SSL_ST_MASK; 505 if (w & SSL_ST_CONNECT) 506 str = "SSL_connect"; 507 else if (w & SSL_ST_ACCEPT) 508 str = "SSL_accept"; 509 else 510 str = "undefined"; 511 512 if (where & SSL_CB_LOOP) { 513 wpa_printf(MSG_DEBUG, "SSL: %s:%s", 514 str, SSL_state_string_long(ssl)); 515 } else if (where & SSL_CB_ALERT) { 516 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", 517 where & SSL_CB_READ ? 518 "read (remote end reported an error)" : 519 "write (local SSL3 detected an error)", 520 SSL_alert_type_string_long(ret), 521 SSL_alert_desc_string_long(ret)); 522 if ((ret >> 8) == SSL3_AL_FATAL) { 523 struct tls_connection *conn = 524 SSL_get_app_data((SSL *) ssl); 525 if (where & SSL_CB_READ) 526 conn->read_alerts++; 527 else 528 conn->write_alerts++; 529 } 530 if (tls_global->event_cb != NULL) { 531 union tls_event_data ev; 532 os_memset(&ev, 0, sizeof(ev)); 533 ev.alert.is_local = !(where & SSL_CB_READ); 534 ev.alert.type = SSL_alert_type_string_long(ret); 535 ev.alert.description = SSL_alert_desc_string_long(ret); 536 tls_global->event_cb(tls_global->cb_ctx, TLS_ALERT, 537 &ev); 538 } 539 } else if (where & SSL_CB_EXIT && ret <= 0) { 540 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", 541 str, ret == 0 ? "failed" : "error", 542 SSL_state_string_long(ssl)); 543 } 544 } 545 546 547 #ifndef OPENSSL_NO_ENGINE 548 /** 549 * tls_engine_load_dynamic_generic - load any openssl engine 550 * @pre: an array of commands and values that load an engine initialized 551 * in the engine specific function 552 * @post: an array of commands and values that initialize an already loaded 553 * engine (or %NULL if not required) 554 * @id: the engine id of the engine to load (only required if post is not %NULL 555 * 556 * This function is a generic function that loads any openssl engine. 557 * 558 * Returns: 0 on success, -1 on failure 559 */ 560 static int tls_engine_load_dynamic_generic(const char *pre[], 561 const char *post[], const char *id) 562 { 563 ENGINE *engine; 564 const char *dynamic_id = "dynamic"; 565 566 engine = ENGINE_by_id(id); 567 if (engine) { 568 ENGINE_free(engine); 569 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already " 570 "available", id); 571 return 0; 572 } 573 ERR_clear_error(); 574 575 engine = ENGINE_by_id(dynamic_id); 576 if (engine == NULL) { 577 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 578 dynamic_id, 579 ERR_error_string(ERR_get_error(), NULL)); 580 return -1; 581 } 582 583 /* Perform the pre commands. This will load the engine. */ 584 while (pre && pre[0]) { 585 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]); 586 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) { 587 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: " 588 "%s %s [%s]", pre[0], pre[1], 589 ERR_error_string(ERR_get_error(), NULL)); 590 ENGINE_free(engine); 591 return -1; 592 } 593 pre += 2; 594 } 595 596 /* 597 * Free the reference to the "dynamic" engine. The loaded engine can 598 * now be looked up using ENGINE_by_id(). 599 */ 600 ENGINE_free(engine); 601 602 engine = ENGINE_by_id(id); 603 if (engine == NULL) { 604 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", 605 id, ERR_error_string(ERR_get_error(), NULL)); 606 return -1; 607 } 608 609 while (post && post[0]) { 610 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]); 611 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) { 612 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:" 613 " %s %s [%s]", post[0], post[1], 614 ERR_error_string(ERR_get_error(), NULL)); 615 ENGINE_remove(engine); 616 ENGINE_free(engine); 617 return -1; 618 } 619 post += 2; 620 } 621 ENGINE_free(engine); 622 623 return 0; 624 } 625 626 627 /** 628 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc 629 * @pkcs11_so_path: pksc11_so_path from the configuration 630 * @pcks11_module_path: pkcs11_module_path from the configuration 631 */ 632 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path, 633 const char *pkcs11_module_path) 634 { 635 char *engine_id = "pkcs11"; 636 const char *pre_cmd[] = { 637 "SO_PATH", NULL /* pkcs11_so_path */, 638 "ID", NULL /* engine_id */, 639 "LIST_ADD", "1", 640 /* "NO_VCHECK", "1", */ 641 "LOAD", NULL, 642 NULL, NULL 643 }; 644 const char *post_cmd[] = { 645 "MODULE_PATH", NULL /* pkcs11_module_path */, 646 NULL, NULL 647 }; 648 649 if (!pkcs11_so_path || !pkcs11_module_path) 650 return 0; 651 652 pre_cmd[1] = pkcs11_so_path; 653 pre_cmd[3] = engine_id; 654 post_cmd[1] = pkcs11_module_path; 655 656 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s", 657 pkcs11_so_path); 658 659 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id); 660 } 661 662 663 /** 664 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc 665 * @opensc_so_path: opensc_so_path from the configuration 666 */ 667 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path) 668 { 669 char *engine_id = "opensc"; 670 const char *pre_cmd[] = { 671 "SO_PATH", NULL /* opensc_so_path */, 672 "ID", NULL /* engine_id */, 673 "LIST_ADD", "1", 674 "LOAD", NULL, 675 NULL, NULL 676 }; 677 678 if (!opensc_so_path) 679 return 0; 680 681 pre_cmd[1] = opensc_so_path; 682 pre_cmd[3] = engine_id; 683 684 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s", 685 opensc_so_path); 686 687 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id); 688 } 689 #endif /* OPENSSL_NO_ENGINE */ 690 691 692 void * tls_init(const struct tls_config *conf) 693 { 694 SSL_CTX *ssl; 695 696 if (tls_openssl_ref_count == 0) { 697 tls_global = os_zalloc(sizeof(*tls_global)); 698 if (tls_global == NULL) 699 return NULL; 700 if (conf) { 701 tls_global->event_cb = conf->event_cb; 702 tls_global->cb_ctx = conf->cb_ctx; 703 tls_global->cert_in_cb = conf->cert_in_cb; 704 } 705 706 #ifdef CONFIG_FIPS 707 #ifdef OPENSSL_FIPS 708 if (conf && conf->fips_mode) { 709 if (!FIPS_mode_set(1)) { 710 wpa_printf(MSG_ERROR, "Failed to enable FIPS " 711 "mode"); 712 ERR_load_crypto_strings(); 713 ERR_print_errors_fp(stderr); 714 os_free(tls_global); 715 tls_global = NULL; 716 return NULL; 717 } else 718 wpa_printf(MSG_INFO, "Running in FIPS mode"); 719 } 720 #else /* OPENSSL_FIPS */ 721 if (conf && conf->fips_mode) { 722 wpa_printf(MSG_ERROR, "FIPS mode requested, but not " 723 "supported"); 724 os_free(tls_global); 725 tls_global = NULL; 726 return NULL; 727 } 728 #endif /* OPENSSL_FIPS */ 729 #endif /* CONFIG_FIPS */ 730 SSL_load_error_strings(); 731 SSL_library_init(); 732 #if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256) 733 EVP_add_digest(EVP_sha256()); 734 #endif /* OPENSSL_NO_SHA256 */ 735 /* TODO: if /dev/urandom is available, PRNG is seeded 736 * automatically. If this is not the case, random data should 737 * be added here. */ 738 739 #ifdef PKCS12_FUNCS 740 #ifndef OPENSSL_NO_RC2 741 /* 742 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it. 743 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8 744 * versions, but it looks like OpenSSL 1.0.0 does not do that 745 * anymore. 746 */ 747 EVP_add_cipher(EVP_rc2_40_cbc()); 748 #endif /* OPENSSL_NO_RC2 */ 749 PKCS12_PBE_add(); 750 #endif /* PKCS12_FUNCS */ 751 } 752 tls_openssl_ref_count++; 753 754 ssl = SSL_CTX_new(TLSv1_method()); 755 if (ssl == NULL) 756 return NULL; 757 758 SSL_CTX_set_info_callback(ssl, ssl_info_cb); 759 760 #ifndef OPENSSL_NO_ENGINE 761 if (conf && 762 (conf->opensc_engine_path || conf->pkcs11_engine_path || 763 conf->pkcs11_module_path)) { 764 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine"); 765 ERR_load_ENGINE_strings(); 766 ENGINE_load_dynamic(); 767 768 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) || 769 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path, 770 conf->pkcs11_module_path)) { 771 tls_deinit(ssl); 772 return NULL; 773 } 774 } 775 #endif /* OPENSSL_NO_ENGINE */ 776 777 return ssl; 778 } 779 780 781 void tls_deinit(void *ssl_ctx) 782 { 783 SSL_CTX *ssl = ssl_ctx; 784 SSL_CTX_free(ssl); 785 786 tls_openssl_ref_count--; 787 if (tls_openssl_ref_count == 0) { 788 #ifndef OPENSSL_NO_ENGINE 789 ENGINE_cleanup(); 790 #endif /* OPENSSL_NO_ENGINE */ 791 CRYPTO_cleanup_all_ex_data(); 792 ERR_remove_state(0); 793 ERR_free_strings(); 794 EVP_cleanup(); 795 os_free(tls_global); 796 tls_global = NULL; 797 } 798 } 799 800 801 static int tls_engine_init(struct tls_connection *conn, const char *engine_id, 802 const char *pin, const char *key_id, 803 const char *cert_id, const char *ca_cert_id) 804 { 805 #ifndef OPENSSL_NO_ENGINE 806 int ret = -1; 807 if (engine_id == NULL) { 808 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set"); 809 return -1; 810 } 811 #ifndef ANDROID 812 if (pin == NULL) { 813 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set"); 814 return -1; 815 } 816 #endif 817 if (key_id == NULL) { 818 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set"); 819 return -1; 820 } 821 822 ERR_clear_error(); 823 #ifdef ANDROID 824 ENGINE_load_dynamic(); 825 #endif 826 conn->engine = ENGINE_by_id(engine_id); 827 if (!conn->engine) { 828 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]", 829 engine_id, ERR_error_string(ERR_get_error(), NULL)); 830 goto err; 831 } 832 if (ENGINE_init(conn->engine) != 1) { 833 wpa_printf(MSG_ERROR, "ENGINE: engine init failed " 834 "(engine: %s) [%s]", engine_id, 835 ERR_error_string(ERR_get_error(), NULL)); 836 goto err; 837 } 838 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized"); 839 840 #ifndef ANDROID 841 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) { 842 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]", 843 ERR_error_string(ERR_get_error(), NULL)); 844 goto err; 845 } 846 #endif 847 /* load private key first in-case PIN is required for cert */ 848 conn->private_key = ENGINE_load_private_key(conn->engine, 849 key_id, NULL, NULL); 850 if (!conn->private_key) { 851 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id" 852 " '%s' [%s]", key_id, 853 ERR_error_string(ERR_get_error(), NULL)); 854 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 855 goto err; 856 } 857 858 /* handle a certificate and/or CA certificate */ 859 if (cert_id || ca_cert_id) { 860 const char *cmd_name = "LOAD_CERT_CTRL"; 861 862 /* test if the engine supports a LOAD_CERT_CTRL */ 863 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME, 864 0, (void *)cmd_name, NULL)) { 865 wpa_printf(MSG_ERROR, "ENGINE: engine does not support" 866 " loading certificates"); 867 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 868 goto err; 869 } 870 } 871 872 return 0; 873 874 err: 875 if (conn->engine) { 876 ENGINE_free(conn->engine); 877 conn->engine = NULL; 878 } 879 880 if (conn->private_key) { 881 EVP_PKEY_free(conn->private_key); 882 conn->private_key = NULL; 883 } 884 885 return ret; 886 #else /* OPENSSL_NO_ENGINE */ 887 return 0; 888 #endif /* OPENSSL_NO_ENGINE */ 889 } 890 891 892 static void tls_engine_deinit(struct tls_connection *conn) 893 { 894 #ifndef OPENSSL_NO_ENGINE 895 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit"); 896 if (conn->private_key) { 897 EVP_PKEY_free(conn->private_key); 898 conn->private_key = NULL; 899 } 900 if (conn->engine) { 901 ENGINE_finish(conn->engine); 902 conn->engine = NULL; 903 } 904 #endif /* OPENSSL_NO_ENGINE */ 905 } 906 907 908 int tls_get_errors(void *ssl_ctx) 909 { 910 int count = 0; 911 unsigned long err; 912 913 while ((err = ERR_get_error())) { 914 wpa_printf(MSG_INFO, "TLS - SSL error: %s", 915 ERR_error_string(err, NULL)); 916 count++; 917 } 918 919 return count; 920 } 921 922 struct tls_connection * tls_connection_init(void *ssl_ctx) 923 { 924 SSL_CTX *ssl = ssl_ctx; 925 struct tls_connection *conn; 926 long options; 927 928 conn = os_zalloc(sizeof(*conn)); 929 if (conn == NULL) 930 return NULL; 931 conn->ssl = SSL_new(ssl); 932 if (conn->ssl == NULL) { 933 tls_show_errors(MSG_INFO, __func__, 934 "Failed to initialize new SSL connection"); 935 os_free(conn); 936 return NULL; 937 } 938 939 SSL_set_app_data(conn->ssl, conn); 940 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | 941 SSL_OP_SINGLE_DH_USE; 942 #ifdef SSL_OP_NO_COMPRESSION 943 options |= SSL_OP_NO_COMPRESSION; 944 #endif /* SSL_OP_NO_COMPRESSION */ 945 #ifdef ANDROID 946 options |= SSL_OP_NO_TLSv1_1; 947 options |= SSL_OP_NO_TLSv1_2; 948 options |= SSL_OP_NO_TICKET; 949 #endif /* ANDROID */ 950 SSL_set_options(conn->ssl, options); 951 952 conn->ssl_in = BIO_new(BIO_s_mem()); 953 if (!conn->ssl_in) { 954 tls_show_errors(MSG_INFO, __func__, 955 "Failed to create a new BIO for ssl_in"); 956 SSL_free(conn->ssl); 957 os_free(conn); 958 return NULL; 959 } 960 961 conn->ssl_out = BIO_new(BIO_s_mem()); 962 if (!conn->ssl_out) { 963 tls_show_errors(MSG_INFO, __func__, 964 "Failed to create a new BIO for ssl_out"); 965 SSL_free(conn->ssl); 966 BIO_free(conn->ssl_in); 967 os_free(conn); 968 return NULL; 969 } 970 971 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out); 972 973 return conn; 974 } 975 976 977 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) 978 { 979 if (conn == NULL) 980 return; 981 SSL_free(conn->ssl); 982 tls_engine_deinit(conn); 983 os_free(conn->subject_match); 984 os_free(conn->altsubject_match); 985 os_free(conn->session_ticket); 986 os_free(conn); 987 } 988 989 990 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) 991 { 992 return conn ? SSL_is_init_finished(conn->ssl) : 0; 993 } 994 995 996 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) 997 { 998 if (conn == NULL) 999 return -1; 1000 1001 /* Shutdown previous TLS connection without notifying the peer 1002 * because the connection was already terminated in practice 1003 * and "close notify" shutdown alert would confuse AS. */ 1004 SSL_set_quiet_shutdown(conn->ssl, 1); 1005 SSL_shutdown(conn->ssl); 1006 return 0; 1007 } 1008 1009 1010 static int tls_match_altsubject_component(X509 *cert, int type, 1011 const char *value, size_t len) 1012 { 1013 GENERAL_NAME *gen; 1014 void *ext; 1015 int i, found = 0; 1016 1017 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); 1018 1019 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { 1020 gen = sk_GENERAL_NAME_value(ext, i); 1021 if (gen->type != type) 1022 continue; 1023 if (os_strlen((char *) gen->d.ia5->data) == len && 1024 os_memcmp(value, gen->d.ia5->data, len) == 0) 1025 found++; 1026 } 1027 1028 return found; 1029 } 1030 1031 1032 static int tls_match_altsubject(X509 *cert, const char *match) 1033 { 1034 int type; 1035 const char *pos, *end; 1036 size_t len; 1037 1038 pos = match; 1039 do { 1040 if (os_strncmp(pos, "EMAIL:", 6) == 0) { 1041 type = GEN_EMAIL; 1042 pos += 6; 1043 } else if (os_strncmp(pos, "DNS:", 4) == 0) { 1044 type = GEN_DNS; 1045 pos += 4; 1046 } else if (os_strncmp(pos, "URI:", 4) == 0) { 1047 type = GEN_URI; 1048 pos += 4; 1049 } else { 1050 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName " 1051 "match '%s'", pos); 1052 return 0; 1053 } 1054 end = os_strchr(pos, ';'); 1055 while (end) { 1056 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 || 1057 os_strncmp(end + 1, "DNS:", 4) == 0 || 1058 os_strncmp(end + 1, "URI:", 4) == 0) 1059 break; 1060 end = os_strchr(end + 1, ';'); 1061 } 1062 if (end) 1063 len = end - pos; 1064 else 1065 len = os_strlen(pos); 1066 if (tls_match_altsubject_component(cert, type, pos, len) > 0) 1067 return 1; 1068 pos = end + 1; 1069 } while (end); 1070 1071 return 0; 1072 } 1073 1074 1075 static enum tls_fail_reason openssl_tls_fail_reason(int err) 1076 { 1077 switch (err) { 1078 case X509_V_ERR_CERT_REVOKED: 1079 return TLS_FAIL_REVOKED; 1080 case X509_V_ERR_CERT_NOT_YET_VALID: 1081 case X509_V_ERR_CRL_NOT_YET_VALID: 1082 return TLS_FAIL_NOT_YET_VALID; 1083 case X509_V_ERR_CERT_HAS_EXPIRED: 1084 case X509_V_ERR_CRL_HAS_EXPIRED: 1085 return TLS_FAIL_EXPIRED; 1086 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 1087 case X509_V_ERR_UNABLE_TO_GET_CRL: 1088 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 1089 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 1090 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 1091 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 1092 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 1093 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 1094 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 1095 case X509_V_ERR_INVALID_CA: 1096 return TLS_FAIL_UNTRUSTED; 1097 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 1098 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 1099 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 1100 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 1101 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 1102 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 1103 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 1104 case X509_V_ERR_CERT_UNTRUSTED: 1105 case X509_V_ERR_CERT_REJECTED: 1106 return TLS_FAIL_BAD_CERTIFICATE; 1107 default: 1108 return TLS_FAIL_UNSPECIFIED; 1109 } 1110 } 1111 1112 1113 static struct wpabuf * get_x509_cert(X509 *cert) 1114 { 1115 struct wpabuf *buf; 1116 u8 *tmp; 1117 1118 int cert_len = i2d_X509(cert, NULL); 1119 if (cert_len <= 0) 1120 return NULL; 1121 1122 buf = wpabuf_alloc(cert_len); 1123 if (buf == NULL) 1124 return NULL; 1125 1126 tmp = wpabuf_put(buf, cert_len); 1127 i2d_X509(cert, &tmp); 1128 return buf; 1129 } 1130 1131 1132 static void openssl_tls_fail_event(struct tls_connection *conn, 1133 X509 *err_cert, int err, int depth, 1134 const char *subject, const char *err_str, 1135 enum tls_fail_reason reason) 1136 { 1137 union tls_event_data ev; 1138 struct wpabuf *cert = NULL; 1139 1140 if (tls_global->event_cb == NULL) 1141 return; 1142 1143 cert = get_x509_cert(err_cert); 1144 os_memset(&ev, 0, sizeof(ev)); 1145 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ? 1146 reason : openssl_tls_fail_reason(err); 1147 ev.cert_fail.depth = depth; 1148 ev.cert_fail.subject = subject; 1149 ev.cert_fail.reason_txt = err_str; 1150 ev.cert_fail.cert = cert; 1151 tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); 1152 wpabuf_free(cert); 1153 } 1154 1155 1156 static void openssl_tls_cert_event(struct tls_connection *conn, 1157 X509 *err_cert, int depth, 1158 const char *subject) 1159 { 1160 struct wpabuf *cert = NULL; 1161 union tls_event_data ev; 1162 #ifdef CONFIG_SHA256 1163 u8 hash[32]; 1164 #endif /* CONFIG_SHA256 */ 1165 1166 if (tls_global->event_cb == NULL) 1167 return; 1168 1169 os_memset(&ev, 0, sizeof(ev)); 1170 if (conn->cert_probe || tls_global->cert_in_cb) { 1171 cert = get_x509_cert(err_cert); 1172 ev.peer_cert.cert = cert; 1173 } 1174 #ifdef CONFIG_SHA256 1175 if (cert) { 1176 const u8 *addr[1]; 1177 size_t len[1]; 1178 addr[0] = wpabuf_head(cert); 1179 len[0] = wpabuf_len(cert); 1180 if (sha256_vector(1, addr, len, hash) == 0) { 1181 ev.peer_cert.hash = hash; 1182 ev.peer_cert.hash_len = sizeof(hash); 1183 } 1184 } 1185 #endif /* CONFIG_SHA256 */ 1186 ev.peer_cert.depth = depth; 1187 ev.peer_cert.subject = subject; 1188 tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev); 1189 wpabuf_free(cert); 1190 } 1191 1192 1193 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) 1194 { 1195 char buf[256]; 1196 X509 *err_cert; 1197 int err, depth; 1198 SSL *ssl; 1199 struct tls_connection *conn; 1200 char *match, *altmatch; 1201 const char *err_str; 1202 1203 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); 1204 err = X509_STORE_CTX_get_error(x509_ctx); 1205 depth = X509_STORE_CTX_get_error_depth(x509_ctx); 1206 ssl = X509_STORE_CTX_get_ex_data(x509_ctx, 1207 SSL_get_ex_data_X509_STORE_CTX_idx()); 1208 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); 1209 1210 conn = SSL_get_app_data(ssl); 1211 if (conn == NULL) 1212 return 0; 1213 match = conn->subject_match; 1214 altmatch = conn->altsubject_match; 1215 1216 if (!preverify_ok && !conn->ca_cert_verify) 1217 preverify_ok = 1; 1218 if (!preverify_ok && depth > 0 && conn->server_cert_only) 1219 preverify_ok = 1; 1220 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) && 1221 (err == X509_V_ERR_CERT_HAS_EXPIRED || 1222 err == X509_V_ERR_CERT_NOT_YET_VALID)) { 1223 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity " 1224 "time mismatch"); 1225 preverify_ok = 1; 1226 } 1227 1228 err_str = X509_verify_cert_error_string(err); 1229 1230 #ifdef CONFIG_SHA256 1231 if (preverify_ok && depth == 0 && conn->server_cert_only) { 1232 struct wpabuf *cert; 1233 cert = get_x509_cert(err_cert); 1234 if (!cert) { 1235 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch " 1236 "server certificate data"); 1237 preverify_ok = 0; 1238 } else { 1239 u8 hash[32]; 1240 const u8 *addr[1]; 1241 size_t len[1]; 1242 addr[0] = wpabuf_head(cert); 1243 len[0] = wpabuf_len(cert); 1244 if (sha256_vector(1, addr, len, hash) < 0 || 1245 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) { 1246 err_str = "Server certificate mismatch"; 1247 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN; 1248 preverify_ok = 0; 1249 } 1250 wpabuf_free(cert); 1251 } 1252 } 1253 #endif /* CONFIG_SHA256 */ 1254 1255 if (!preverify_ok) { 1256 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," 1257 " error %d (%s) depth %d for '%s'", err, err_str, 1258 depth, buf); 1259 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1260 err_str, TLS_FAIL_UNSPECIFIED); 1261 return preverify_ok; 1262 } 1263 1264 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d " 1265 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'", 1266 preverify_ok, err, err_str, 1267 conn->ca_cert_verify, depth, buf); 1268 if (depth == 0 && match && os_strstr(buf, match) == NULL) { 1269 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " 1270 "match with '%s'", buf, match); 1271 preverify_ok = 0; 1272 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1273 "Subject mismatch", 1274 TLS_FAIL_SUBJECT_MISMATCH); 1275 } else if (depth == 0 && altmatch && 1276 !tls_match_altsubject(err_cert, altmatch)) { 1277 wpa_printf(MSG_WARNING, "TLS: altSubjectName match " 1278 "'%s' not found", altmatch); 1279 preverify_ok = 0; 1280 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1281 "AltSubject mismatch", 1282 TLS_FAIL_ALTSUBJECT_MISMATCH); 1283 } else 1284 openssl_tls_cert_event(conn, err_cert, depth, buf); 1285 1286 if (conn->cert_probe && preverify_ok && depth == 0) { 1287 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate " 1288 "on probe-only run"); 1289 preverify_ok = 0; 1290 openssl_tls_fail_event(conn, err_cert, err, depth, buf, 1291 "Server certificate chain probe", 1292 TLS_FAIL_SERVER_CHAIN_PROBE); 1293 } 1294 1295 if (preverify_ok && tls_global->event_cb != NULL) 1296 tls_global->event_cb(tls_global->cb_ctx, 1297 TLS_CERT_CHAIN_SUCCESS, NULL); 1298 1299 return preverify_ok; 1300 } 1301 1302 1303 #ifndef OPENSSL_NO_STDIO 1304 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert) 1305 { 1306 SSL_CTX *ssl_ctx = _ssl_ctx; 1307 X509_LOOKUP *lookup; 1308 int ret = 0; 1309 1310 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store, 1311 X509_LOOKUP_file()); 1312 if (lookup == NULL) { 1313 tls_show_errors(MSG_WARNING, __func__, 1314 "Failed add lookup for X509 store"); 1315 return -1; 1316 } 1317 1318 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) { 1319 unsigned long err = ERR_peek_error(); 1320 tls_show_errors(MSG_WARNING, __func__, 1321 "Failed load CA in DER format"); 1322 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1323 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1324 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1325 "cert already in hash table error", 1326 __func__); 1327 } else 1328 ret = -1; 1329 } 1330 1331 return ret; 1332 } 1333 #endif /* OPENSSL_NO_STDIO */ 1334 1335 1336 #ifdef ANDROID 1337 static BIO * BIO_from_keystore(const char *key) 1338 { 1339 BIO *bio = NULL; 1340 char value[KEYSTORE_MESSAGE_SIZE]; 1341 int length = keystore_get(key, strlen(key), value); 1342 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL) 1343 BIO_write(bio, value, length); 1344 return bio; 1345 } 1346 #endif /* ANDROID */ 1347 1348 1349 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn, 1350 const char *ca_cert, const u8 *ca_cert_blob, 1351 size_t ca_cert_blob_len, const char *ca_path) 1352 { 1353 SSL_CTX *ssl_ctx = _ssl_ctx; 1354 1355 /* 1356 * Remove previously configured trusted CA certificates before adding 1357 * new ones. 1358 */ 1359 X509_STORE_free(ssl_ctx->cert_store); 1360 ssl_ctx->cert_store = X509_STORE_new(); 1361 if (ssl_ctx->cert_store == NULL) { 1362 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 1363 "certificate store", __func__); 1364 return -1; 1365 } 1366 1367 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1368 conn->ca_cert_verify = 1; 1369 1370 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) { 1371 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate " 1372 "chain"); 1373 conn->cert_probe = 1; 1374 conn->ca_cert_verify = 0; 1375 return 0; 1376 } 1377 1378 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) { 1379 #ifdef CONFIG_SHA256 1380 const char *pos = ca_cert + 7; 1381 if (os_strncmp(pos, "server/sha256/", 14) != 0) { 1382 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert " 1383 "hash value '%s'", ca_cert); 1384 return -1; 1385 } 1386 pos += 14; 1387 if (os_strlen(pos) != 32 * 2) { 1388 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 " 1389 "hash length in ca_cert '%s'", ca_cert); 1390 return -1; 1391 } 1392 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) { 1393 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash " 1394 "value in ca_cert '%s'", ca_cert); 1395 return -1; 1396 } 1397 conn->server_cert_only = 1; 1398 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server " 1399 "certificate match"); 1400 return 0; 1401 #else /* CONFIG_SHA256 */ 1402 wpa_printf(MSG_INFO, "No SHA256 included in the build - " 1403 "cannot validate server certificate hash"); 1404 return -1; 1405 #endif /* CONFIG_SHA256 */ 1406 } 1407 1408 if (ca_cert_blob) { 1409 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob, 1410 ca_cert_blob_len); 1411 if (cert == NULL) { 1412 tls_show_errors(MSG_WARNING, __func__, 1413 "Failed to parse ca_cert_blob"); 1414 return -1; 1415 } 1416 1417 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 1418 unsigned long err = ERR_peek_error(); 1419 tls_show_errors(MSG_WARNING, __func__, 1420 "Failed to add ca_cert_blob to " 1421 "certificate store"); 1422 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1423 ERR_GET_REASON(err) == 1424 X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1425 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " 1426 "cert already in hash table error", 1427 __func__); 1428 } else { 1429 X509_free(cert); 1430 return -1; 1431 } 1432 } 1433 X509_free(cert); 1434 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob " 1435 "to certificate store", __func__); 1436 return 0; 1437 } 1438 1439 #ifdef ANDROID 1440 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) { 1441 BIO *bio = BIO_from_keystore(&ca_cert[11]); 1442 STACK_OF(X509_INFO) *stack = NULL; 1443 int i; 1444 1445 if (bio) { 1446 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL); 1447 BIO_free(bio); 1448 } 1449 if (!stack) 1450 return -1; 1451 1452 for (i = 0; i < sk_X509_INFO_num(stack); ++i) { 1453 X509_INFO *info = sk_X509_INFO_value(stack, i); 1454 if (info->x509) { 1455 X509_STORE_add_cert(ssl_ctx->cert_store, 1456 info->x509); 1457 } 1458 if (info->crl) { 1459 X509_STORE_add_crl(ssl_ctx->cert_store, 1460 info->crl); 1461 } 1462 } 1463 sk_X509_INFO_pop_free(stack, X509_INFO_free); 1464 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1465 return 0; 1466 } 1467 #endif /* ANDROID */ 1468 1469 #ifdef CONFIG_NATIVE_WINDOWS 1470 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) == 1471 0) { 1472 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from " 1473 "system certificate store"); 1474 return 0; 1475 } 1476 #endif /* CONFIG_NATIVE_WINDOWS */ 1477 1478 if (ca_cert || ca_path) { 1479 #ifndef OPENSSL_NO_STDIO 1480 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) != 1481 1) { 1482 tls_show_errors(MSG_WARNING, __func__, 1483 "Failed to load root certificates"); 1484 if (ca_cert && 1485 tls_load_ca_der(ssl_ctx, ca_cert) == 0) { 1486 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded " 1487 "DER format CA certificate", 1488 __func__); 1489 } else 1490 return -1; 1491 } else { 1492 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 1493 "certificate(s) loaded"); 1494 tls_get_errors(ssl_ctx); 1495 } 1496 #else /* OPENSSL_NO_STDIO */ 1497 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 1498 __func__); 1499 return -1; 1500 #endif /* OPENSSL_NO_STDIO */ 1501 } else { 1502 /* No ca_cert configured - do not try to verify server 1503 * certificate */ 1504 conn->ca_cert_verify = 0; 1505 } 1506 1507 return 0; 1508 } 1509 1510 1511 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert) 1512 { 1513 if (ca_cert) { 1514 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1) 1515 { 1516 tls_show_errors(MSG_WARNING, __func__, 1517 "Failed to load root certificates"); 1518 return -1; 1519 } 1520 1521 wpa_printf(MSG_DEBUG, "TLS: Trusted root " 1522 "certificate(s) loaded"); 1523 1524 #ifndef OPENSSL_NO_STDIO 1525 /* Add the same CAs to the client certificate requests */ 1526 SSL_CTX_set_client_CA_list(ssl_ctx, 1527 SSL_load_client_CA_file(ca_cert)); 1528 #endif /* OPENSSL_NO_STDIO */ 1529 } 1530 1531 return 0; 1532 } 1533 1534 1535 int tls_global_set_verify(void *ssl_ctx, int check_crl) 1536 { 1537 int flags; 1538 1539 if (check_crl) { 1540 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx); 1541 if (cs == NULL) { 1542 tls_show_errors(MSG_INFO, __func__, "Failed to get " 1543 "certificate store when enabling " 1544 "check_crl"); 1545 return -1; 1546 } 1547 flags = X509_V_FLAG_CRL_CHECK; 1548 if (check_crl == 2) 1549 flags |= X509_V_FLAG_CRL_CHECK_ALL; 1550 X509_STORE_set_flags(cs, flags); 1551 } 1552 return 0; 1553 } 1554 1555 1556 static int tls_connection_set_subject_match(struct tls_connection *conn, 1557 const char *subject_match, 1558 const char *altsubject_match) 1559 { 1560 os_free(conn->subject_match); 1561 conn->subject_match = NULL; 1562 if (subject_match) { 1563 conn->subject_match = os_strdup(subject_match); 1564 if (conn->subject_match == NULL) 1565 return -1; 1566 } 1567 1568 os_free(conn->altsubject_match); 1569 conn->altsubject_match = NULL; 1570 if (altsubject_match) { 1571 conn->altsubject_match = os_strdup(altsubject_match); 1572 if (conn->altsubject_match == NULL) 1573 return -1; 1574 } 1575 1576 return 0; 1577 } 1578 1579 1580 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, 1581 int verify_peer) 1582 { 1583 static int counter = 0; 1584 1585 if (conn == NULL) 1586 return -1; 1587 1588 if (verify_peer) { 1589 conn->ca_cert_verify = 1; 1590 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER | 1591 SSL_VERIFY_FAIL_IF_NO_PEER_CERT | 1592 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb); 1593 } else { 1594 conn->ca_cert_verify = 0; 1595 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL); 1596 } 1597 1598 SSL_set_accept_state(conn->ssl); 1599 1600 /* 1601 * Set session id context in order to avoid fatal errors when client 1602 * tries to resume a session. However, set the context to a unique 1603 * value in order to effectively disable session resumption for now 1604 * since not all areas of the server code are ready for it (e.g., 1605 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS 1606 * handshake). 1607 */ 1608 counter++; 1609 SSL_set_session_id_context(conn->ssl, 1610 (const unsigned char *) &counter, 1611 sizeof(counter)); 1612 1613 return 0; 1614 } 1615 1616 1617 static int tls_connection_client_cert(struct tls_connection *conn, 1618 const char *client_cert, 1619 const u8 *client_cert_blob, 1620 size_t client_cert_blob_len) 1621 { 1622 if (client_cert == NULL && client_cert_blob == NULL) 1623 return 0; 1624 1625 if (client_cert_blob && 1626 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob, 1627 client_cert_blob_len) == 1) { 1628 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> " 1629 "OK"); 1630 return 0; 1631 } else if (client_cert_blob) { 1632 tls_show_errors(MSG_DEBUG, __func__, 1633 "SSL_use_certificate_ASN1 failed"); 1634 } 1635 1636 if (client_cert == NULL) 1637 return -1; 1638 1639 #ifdef ANDROID 1640 if (os_strncmp("keystore://", client_cert, 11) == 0) { 1641 BIO *bio = BIO_from_keystore(&client_cert[11]); 1642 X509 *x509 = NULL; 1643 int ret = -1; 1644 if (bio) { 1645 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); 1646 BIO_free(bio); 1647 } 1648 if (x509) { 1649 if (SSL_use_certificate(conn->ssl, x509) == 1) 1650 ret = 0; 1651 X509_free(x509); 1652 } 1653 return ret; 1654 } 1655 #endif /* ANDROID */ 1656 1657 #ifndef OPENSSL_NO_STDIO 1658 if (SSL_use_certificate_file(conn->ssl, client_cert, 1659 SSL_FILETYPE_ASN1) == 1) { 1660 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)" 1661 " --> OK"); 1662 return 0; 1663 } 1664 1665 if (SSL_use_certificate_file(conn->ssl, client_cert, 1666 SSL_FILETYPE_PEM) == 1) { 1667 ERR_clear_error(); 1668 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)" 1669 " --> OK"); 1670 return 0; 1671 } 1672 1673 tls_show_errors(MSG_DEBUG, __func__, 1674 "SSL_use_certificate_file failed"); 1675 #else /* OPENSSL_NO_STDIO */ 1676 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 1677 #endif /* OPENSSL_NO_STDIO */ 1678 1679 return -1; 1680 } 1681 1682 1683 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert) 1684 { 1685 #ifndef OPENSSL_NO_STDIO 1686 if (client_cert == NULL) 1687 return 0; 1688 1689 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 1690 SSL_FILETYPE_ASN1) != 1 && 1691 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 && 1692 SSL_CTX_use_certificate_file(ssl_ctx, client_cert, 1693 SSL_FILETYPE_PEM) != 1) { 1694 tls_show_errors(MSG_INFO, __func__, 1695 "Failed to load client certificate"); 1696 return -1; 1697 } 1698 return 0; 1699 #else /* OPENSSL_NO_STDIO */ 1700 if (client_cert == NULL) 1701 return 0; 1702 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); 1703 return -1; 1704 #endif /* OPENSSL_NO_STDIO */ 1705 } 1706 1707 1708 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password) 1709 { 1710 if (password == NULL) { 1711 return 0; 1712 } 1713 os_strlcpy(buf, (char *) password, size); 1714 return os_strlen(buf); 1715 } 1716 1717 1718 #ifdef PKCS12_FUNCS 1719 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12, 1720 const char *passwd) 1721 { 1722 EVP_PKEY *pkey; 1723 X509 *cert; 1724 STACK_OF(X509) *certs; 1725 int res = 0; 1726 char buf[256]; 1727 1728 pkey = NULL; 1729 cert = NULL; 1730 certs = NULL; 1731 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) { 1732 tls_show_errors(MSG_DEBUG, __func__, 1733 "Failed to parse PKCS12 file"); 1734 PKCS12_free(p12); 1735 return -1; 1736 } 1737 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data"); 1738 1739 if (cert) { 1740 X509_NAME_oneline(X509_get_subject_name(cert), buf, 1741 sizeof(buf)); 1742 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: " 1743 "subject='%s'", buf); 1744 if (ssl) { 1745 if (SSL_use_certificate(ssl, cert) != 1) 1746 res = -1; 1747 } else { 1748 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1) 1749 res = -1; 1750 } 1751 X509_free(cert); 1752 } 1753 1754 if (pkey) { 1755 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12"); 1756 if (ssl) { 1757 if (SSL_use_PrivateKey(ssl, pkey) != 1) 1758 res = -1; 1759 } else { 1760 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1) 1761 res = -1; 1762 } 1763 EVP_PKEY_free(pkey); 1764 } 1765 1766 if (certs) { 1767 while ((cert = sk_X509_pop(certs)) != NULL) { 1768 X509_NAME_oneline(X509_get_subject_name(cert), buf, 1769 sizeof(buf)); 1770 wpa_printf(MSG_DEBUG, "TLS: additional certificate" 1771 " from PKCS12: subject='%s'", buf); 1772 /* 1773 * There is no SSL equivalent for the chain cert - so 1774 * always add it to the context... 1775 */ 1776 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) { 1777 res = -1; 1778 break; 1779 } 1780 } 1781 sk_X509_free(certs); 1782 } 1783 1784 PKCS12_free(p12); 1785 1786 if (res < 0) 1787 tls_get_errors(ssl_ctx); 1788 1789 return res; 1790 } 1791 #endif /* PKCS12_FUNCS */ 1792 1793 1794 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key, 1795 const char *passwd) 1796 { 1797 #ifdef PKCS12_FUNCS 1798 FILE *f; 1799 PKCS12 *p12; 1800 1801 f = fopen(private_key, "rb"); 1802 if (f == NULL) 1803 return -1; 1804 1805 p12 = d2i_PKCS12_fp(f, NULL); 1806 fclose(f); 1807 1808 if (p12 == NULL) { 1809 tls_show_errors(MSG_INFO, __func__, 1810 "Failed to use PKCS#12 file"); 1811 return -1; 1812 } 1813 1814 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); 1815 1816 #else /* PKCS12_FUNCS */ 1817 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read " 1818 "p12/pfx files"); 1819 return -1; 1820 #endif /* PKCS12_FUNCS */ 1821 } 1822 1823 1824 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl, 1825 const u8 *blob, size_t len, const char *passwd) 1826 { 1827 #ifdef PKCS12_FUNCS 1828 PKCS12 *p12; 1829 1830 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len); 1831 if (p12 == NULL) { 1832 tls_show_errors(MSG_INFO, __func__, 1833 "Failed to use PKCS#12 blob"); 1834 return -1; 1835 } 1836 1837 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); 1838 1839 #else /* PKCS12_FUNCS */ 1840 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse " 1841 "p12/pfx blobs"); 1842 return -1; 1843 #endif /* PKCS12_FUNCS */ 1844 } 1845 1846 1847 #ifndef OPENSSL_NO_ENGINE 1848 static int tls_engine_get_cert(struct tls_connection *conn, 1849 const char *cert_id, 1850 X509 **cert) 1851 { 1852 /* this runs after the private key is loaded so no PIN is required */ 1853 struct { 1854 const char *cert_id; 1855 X509 *cert; 1856 } params; 1857 params.cert_id = cert_id; 1858 params.cert = NULL; 1859 1860 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL", 1861 0, ¶ms, NULL, 1)) { 1862 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id" 1863 " '%s' [%s]", cert_id, 1864 ERR_error_string(ERR_get_error(), NULL)); 1865 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1866 } 1867 if (!params.cert) { 1868 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id" 1869 " '%s'", cert_id); 1870 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; 1871 } 1872 *cert = params.cert; 1873 return 0; 1874 } 1875 #endif /* OPENSSL_NO_ENGINE */ 1876 1877 1878 static int tls_connection_engine_client_cert(struct tls_connection *conn, 1879 const char *cert_id) 1880 { 1881 #ifndef OPENSSL_NO_ENGINE 1882 X509 *cert; 1883 1884 if (tls_engine_get_cert(conn, cert_id, &cert)) 1885 return -1; 1886 1887 if (!SSL_use_certificate(conn->ssl, cert)) { 1888 tls_show_errors(MSG_ERROR, __func__, 1889 "SSL_use_certificate failed"); 1890 X509_free(cert); 1891 return -1; 1892 } 1893 X509_free(cert); 1894 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> " 1895 "OK"); 1896 return 0; 1897 1898 #else /* OPENSSL_NO_ENGINE */ 1899 return -1; 1900 #endif /* OPENSSL_NO_ENGINE */ 1901 } 1902 1903 1904 static int tls_connection_engine_ca_cert(void *_ssl_ctx, 1905 struct tls_connection *conn, 1906 const char *ca_cert_id) 1907 { 1908 #ifndef OPENSSL_NO_ENGINE 1909 X509 *cert; 1910 SSL_CTX *ssl_ctx = _ssl_ctx; 1911 1912 if (tls_engine_get_cert(conn, ca_cert_id, &cert)) 1913 return -1; 1914 1915 /* start off the same as tls_connection_ca_cert */ 1916 X509_STORE_free(ssl_ctx->cert_store); 1917 ssl_ctx->cert_store = X509_STORE_new(); 1918 if (ssl_ctx->cert_store == NULL) { 1919 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " 1920 "certificate store", __func__); 1921 X509_free(cert); 1922 return -1; 1923 } 1924 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { 1925 unsigned long err = ERR_peek_error(); 1926 tls_show_errors(MSG_WARNING, __func__, 1927 "Failed to add CA certificate from engine " 1928 "to certificate store"); 1929 if (ERR_GET_LIB(err) == ERR_LIB_X509 && 1930 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1931 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert" 1932 " already in hash table error", 1933 __func__); 1934 } else { 1935 X509_free(cert); 1936 return -1; 1937 } 1938 } 1939 X509_free(cert); 1940 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine " 1941 "to certificate store", __func__); 1942 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); 1943 conn->ca_cert_verify = 1; 1944 1945 return 0; 1946 1947 #else /* OPENSSL_NO_ENGINE */ 1948 return -1; 1949 #endif /* OPENSSL_NO_ENGINE */ 1950 } 1951 1952 1953 static int tls_connection_engine_private_key(struct tls_connection *conn) 1954 { 1955 #ifndef OPENSSL_NO_ENGINE 1956 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) { 1957 tls_show_errors(MSG_ERROR, __func__, 1958 "ENGINE: cannot use private key for TLS"); 1959 return -1; 1960 } 1961 if (!SSL_check_private_key(conn->ssl)) { 1962 tls_show_errors(MSG_INFO, __func__, 1963 "Private key failed verification"); 1964 return -1; 1965 } 1966 return 0; 1967 #else /* OPENSSL_NO_ENGINE */ 1968 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but " 1969 "engine support was not compiled in"); 1970 return -1; 1971 #endif /* OPENSSL_NO_ENGINE */ 1972 } 1973 1974 1975 static int tls_connection_private_key(void *_ssl_ctx, 1976 struct tls_connection *conn, 1977 const char *private_key, 1978 const char *private_key_passwd, 1979 const u8 *private_key_blob, 1980 size_t private_key_blob_len) 1981 { 1982 SSL_CTX *ssl_ctx = _ssl_ctx; 1983 char *passwd; 1984 int ok; 1985 1986 if (private_key == NULL && private_key_blob == NULL) 1987 return 0; 1988 1989 if (private_key_passwd) { 1990 passwd = os_strdup(private_key_passwd); 1991 if (passwd == NULL) 1992 return -1; 1993 } else 1994 passwd = NULL; 1995 1996 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 1997 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 1998 1999 ok = 0; 2000 while (private_key_blob) { 2001 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl, 2002 (u8 *) private_key_blob, 2003 private_key_blob_len) == 1) { 2004 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 2005 "ASN1(EVP_PKEY_RSA) --> OK"); 2006 ok = 1; 2007 break; 2008 } 2009 2010 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl, 2011 (u8 *) private_key_blob, 2012 private_key_blob_len) == 1) { 2013 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" 2014 "ASN1(EVP_PKEY_DSA) --> OK"); 2015 ok = 1; 2016 break; 2017 } 2018 2019 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl, 2020 (u8 *) private_key_blob, 2021 private_key_blob_len) == 1) { 2022 wpa_printf(MSG_DEBUG, "OpenSSL: " 2023 "SSL_use_RSAPrivateKey_ASN1 --> OK"); 2024 ok = 1; 2025 break; 2026 } 2027 2028 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob, 2029 private_key_blob_len, passwd) == 0) { 2030 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> " 2031 "OK"); 2032 ok = 1; 2033 break; 2034 } 2035 2036 break; 2037 } 2038 2039 #ifdef ANDROID 2040 if (!ok && private_key && 2041 os_strncmp("keystore://", private_key, 11) == 0) { 2042 BIO *bio = BIO_from_keystore(&private_key[11]); 2043 EVP_PKEY *pkey = NULL; 2044 if (bio) { 2045 pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL); 2046 BIO_free(bio); 2047 } 2048 if (pkey) { 2049 if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) { 2050 wpa_printf(MSG_DEBUG, "OpenSSL: Private key " 2051 "from keystore"); 2052 ok = 1; 2053 } 2054 EVP_PKEY_free(pkey); 2055 } 2056 } 2057 #endif /* ANDROID */ 2058 2059 while (!ok && private_key) { 2060 #ifndef OPENSSL_NO_STDIO 2061 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2062 SSL_FILETYPE_ASN1) == 1) { 2063 wpa_printf(MSG_DEBUG, "OpenSSL: " 2064 "SSL_use_PrivateKey_File (DER) --> OK"); 2065 ok = 1; 2066 break; 2067 } 2068 2069 if (SSL_use_PrivateKey_file(conn->ssl, private_key, 2070 SSL_FILETYPE_PEM) == 1) { 2071 wpa_printf(MSG_DEBUG, "OpenSSL: " 2072 "SSL_use_PrivateKey_File (PEM) --> OK"); 2073 ok = 1; 2074 break; 2075 } 2076 #else /* OPENSSL_NO_STDIO */ 2077 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", 2078 __func__); 2079 #endif /* OPENSSL_NO_STDIO */ 2080 2081 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd) 2082 == 0) { 2083 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file " 2084 "--> OK"); 2085 ok = 1; 2086 break; 2087 } 2088 2089 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) { 2090 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to " 2091 "access certificate store --> OK"); 2092 ok = 1; 2093 break; 2094 } 2095 2096 break; 2097 } 2098 2099 if (!ok) { 2100 tls_show_errors(MSG_INFO, __func__, 2101 "Failed to load private key"); 2102 os_free(passwd); 2103 return -1; 2104 } 2105 ERR_clear_error(); 2106 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2107 os_free(passwd); 2108 2109 if (!SSL_check_private_key(conn->ssl)) { 2110 tls_show_errors(MSG_INFO, __func__, "Private key failed " 2111 "verification"); 2112 return -1; 2113 } 2114 2115 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully"); 2116 return 0; 2117 } 2118 2119 2120 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key, 2121 const char *private_key_passwd) 2122 { 2123 char *passwd; 2124 2125 if (private_key == NULL) 2126 return 0; 2127 2128 if (private_key_passwd) { 2129 passwd = os_strdup(private_key_passwd); 2130 if (passwd == NULL) 2131 return -1; 2132 } else 2133 passwd = NULL; 2134 2135 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); 2136 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); 2137 if ( 2138 #ifndef OPENSSL_NO_STDIO 2139 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2140 SSL_FILETYPE_ASN1) != 1 && 2141 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, 2142 SSL_FILETYPE_PEM) != 1 && 2143 #endif /* OPENSSL_NO_STDIO */ 2144 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) { 2145 tls_show_errors(MSG_INFO, __func__, 2146 "Failed to load private key"); 2147 os_free(passwd); 2148 ERR_clear_error(); 2149 return -1; 2150 } 2151 os_free(passwd); 2152 ERR_clear_error(); 2153 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); 2154 2155 if (!SSL_CTX_check_private_key(ssl_ctx)) { 2156 tls_show_errors(MSG_INFO, __func__, 2157 "Private key failed verification"); 2158 return -1; 2159 } 2160 2161 return 0; 2162 } 2163 2164 2165 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file) 2166 { 2167 #ifdef OPENSSL_NO_DH 2168 if (dh_file == NULL) 2169 return 0; 2170 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2171 "dh_file specified"); 2172 return -1; 2173 #else /* OPENSSL_NO_DH */ 2174 DH *dh; 2175 BIO *bio; 2176 2177 /* TODO: add support for dh_blob */ 2178 if (dh_file == NULL) 2179 return 0; 2180 if (conn == NULL) 2181 return -1; 2182 2183 bio = BIO_new_file(dh_file, "r"); 2184 if (bio == NULL) { 2185 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2186 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2187 return -1; 2188 } 2189 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2190 BIO_free(bio); 2191 #ifndef OPENSSL_NO_DSA 2192 while (dh == NULL) { 2193 DSA *dsa; 2194 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2195 " trying to parse as DSA params", dh_file, 2196 ERR_error_string(ERR_get_error(), NULL)); 2197 bio = BIO_new_file(dh_file, "r"); 2198 if (bio == NULL) 2199 break; 2200 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2201 BIO_free(bio); 2202 if (!dsa) { 2203 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2204 "'%s': %s", dh_file, 2205 ERR_error_string(ERR_get_error(), NULL)); 2206 break; 2207 } 2208 2209 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2210 dh = DSA_dup_DH(dsa); 2211 DSA_free(dsa); 2212 if (dh == NULL) { 2213 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2214 "params into DH params"); 2215 break; 2216 } 2217 break; 2218 } 2219 #endif /* !OPENSSL_NO_DSA */ 2220 if (dh == NULL) { 2221 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2222 "'%s'", dh_file); 2223 return -1; 2224 } 2225 2226 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) { 2227 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2228 "%s", dh_file, 2229 ERR_error_string(ERR_get_error(), NULL)); 2230 DH_free(dh); 2231 return -1; 2232 } 2233 DH_free(dh); 2234 return 0; 2235 #endif /* OPENSSL_NO_DH */ 2236 } 2237 2238 2239 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file) 2240 { 2241 #ifdef OPENSSL_NO_DH 2242 if (dh_file == NULL) 2243 return 0; 2244 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " 2245 "dh_file specified"); 2246 return -1; 2247 #else /* OPENSSL_NO_DH */ 2248 DH *dh; 2249 BIO *bio; 2250 2251 /* TODO: add support for dh_blob */ 2252 if (dh_file == NULL) 2253 return 0; 2254 if (ssl_ctx == NULL) 2255 return -1; 2256 2257 bio = BIO_new_file(dh_file, "r"); 2258 if (bio == NULL) { 2259 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", 2260 dh_file, ERR_error_string(ERR_get_error(), NULL)); 2261 return -1; 2262 } 2263 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); 2264 BIO_free(bio); 2265 #ifndef OPENSSL_NO_DSA 2266 while (dh == NULL) { 2267 DSA *dsa; 2268 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" 2269 " trying to parse as DSA params", dh_file, 2270 ERR_error_string(ERR_get_error(), NULL)); 2271 bio = BIO_new_file(dh_file, "r"); 2272 if (bio == NULL) 2273 break; 2274 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); 2275 BIO_free(bio); 2276 if (!dsa) { 2277 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " 2278 "'%s': %s", dh_file, 2279 ERR_error_string(ERR_get_error(), NULL)); 2280 break; 2281 } 2282 2283 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); 2284 dh = DSA_dup_DH(dsa); 2285 DSA_free(dsa); 2286 if (dh == NULL) { 2287 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " 2288 "params into DH params"); 2289 break; 2290 } 2291 break; 2292 } 2293 #endif /* !OPENSSL_NO_DSA */ 2294 if (dh == NULL) { 2295 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " 2296 "'%s'", dh_file); 2297 return -1; 2298 } 2299 2300 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) { 2301 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " 2302 "%s", dh_file, 2303 ERR_error_string(ERR_get_error(), NULL)); 2304 DH_free(dh); 2305 return -1; 2306 } 2307 DH_free(dh); 2308 return 0; 2309 #endif /* OPENSSL_NO_DH */ 2310 } 2311 2312 2313 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn, 2314 struct tls_keys *keys) 2315 { 2316 #ifdef CONFIG_FIPS 2317 wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS " 2318 "mode"); 2319 return -1; 2320 #else /* CONFIG_FIPS */ 2321 SSL *ssl; 2322 2323 if (conn == NULL || keys == NULL) 2324 return -1; 2325 ssl = conn->ssl; 2326 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL) 2327 return -1; 2328 2329 os_memset(keys, 0, sizeof(*keys)); 2330 keys->master_key = ssl->session->master_key; 2331 keys->master_key_len = ssl->session->master_key_length; 2332 keys->client_random = ssl->s3->client_random; 2333 keys->client_random_len = SSL3_RANDOM_SIZE; 2334 keys->server_random = ssl->s3->server_random; 2335 keys->server_random_len = SSL3_RANDOM_SIZE; 2336 2337 return 0; 2338 #endif /* CONFIG_FIPS */ 2339 } 2340 2341 2342 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn, 2343 const char *label, int server_random_first, 2344 u8 *out, size_t out_len) 2345 { 2346 #if OPENSSL_VERSION_NUMBER >= 0x10001000L 2347 SSL *ssl; 2348 if (conn == NULL) 2349 return -1; 2350 if (server_random_first) 2351 return -1; 2352 ssl = conn->ssl; 2353 if (SSL_export_keying_material(ssl, out, out_len, label, 2354 os_strlen(label), NULL, 0, 0) == 1) { 2355 wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF"); 2356 return 0; 2357 } 2358 #endif 2359 return -1; 2360 } 2361 2362 2363 static struct wpabuf * 2364 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data, 2365 int server) 2366 { 2367 int res; 2368 struct wpabuf *out_data; 2369 2370 /* 2371 * Give TLS handshake data from the server (if available) to OpenSSL 2372 * for processing. 2373 */ 2374 if (in_data && 2375 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data)) 2376 < 0) { 2377 tls_show_errors(MSG_INFO, __func__, 2378 "Handshake failed - BIO_write"); 2379 return NULL; 2380 } 2381 2382 /* Initiate TLS handshake or continue the existing handshake */ 2383 if (server) 2384 res = SSL_accept(conn->ssl); 2385 else 2386 res = SSL_connect(conn->ssl); 2387 if (res != 1) { 2388 int err = SSL_get_error(conn->ssl, res); 2389 if (err == SSL_ERROR_WANT_READ) 2390 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want " 2391 "more data"); 2392 else if (err == SSL_ERROR_WANT_WRITE) 2393 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to " 2394 "write"); 2395 else { 2396 tls_show_errors(MSG_INFO, __func__, "SSL_connect"); 2397 conn->failed++; 2398 } 2399 } 2400 2401 /* Get the TLS handshake data to be sent to the server */ 2402 res = BIO_ctrl_pending(conn->ssl_out); 2403 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res); 2404 out_data = wpabuf_alloc(res); 2405 if (out_data == NULL) { 2406 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for " 2407 "handshake output (%d bytes)", res); 2408 if (BIO_reset(conn->ssl_out) < 0) { 2409 tls_show_errors(MSG_INFO, __func__, 2410 "BIO_reset failed"); 2411 } 2412 return NULL; 2413 } 2414 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data), 2415 res); 2416 if (res < 0) { 2417 tls_show_errors(MSG_INFO, __func__, 2418 "Handshake failed - BIO_read"); 2419 if (BIO_reset(conn->ssl_out) < 0) { 2420 tls_show_errors(MSG_INFO, __func__, 2421 "BIO_reset failed"); 2422 } 2423 wpabuf_free(out_data); 2424 return NULL; 2425 } 2426 wpabuf_put(out_data, res); 2427 2428 return out_data; 2429 } 2430 2431 2432 static struct wpabuf * 2433 openssl_get_appl_data(struct tls_connection *conn, size_t max_len) 2434 { 2435 struct wpabuf *appl_data; 2436 int res; 2437 2438 appl_data = wpabuf_alloc(max_len + 100); 2439 if (appl_data == NULL) 2440 return NULL; 2441 2442 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data), 2443 wpabuf_size(appl_data)); 2444 if (res < 0) { 2445 int err = SSL_get_error(conn->ssl, res); 2446 if (err == SSL_ERROR_WANT_READ || 2447 err == SSL_ERROR_WANT_WRITE) { 2448 wpa_printf(MSG_DEBUG, "SSL: No Application Data " 2449 "included"); 2450 } else { 2451 tls_show_errors(MSG_INFO, __func__, 2452 "Failed to read possible " 2453 "Application Data"); 2454 } 2455 wpabuf_free(appl_data); 2456 return NULL; 2457 } 2458 2459 wpabuf_put(appl_data, res); 2460 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished " 2461 "message", appl_data); 2462 2463 return appl_data; 2464 } 2465 2466 2467 static struct wpabuf * 2468 openssl_connection_handshake(struct tls_connection *conn, 2469 const struct wpabuf *in_data, 2470 struct wpabuf **appl_data, int server) 2471 { 2472 struct wpabuf *out_data; 2473 2474 if (appl_data) 2475 *appl_data = NULL; 2476 2477 out_data = openssl_handshake(conn, in_data, server); 2478 if (out_data == NULL) 2479 return NULL; 2480 2481 if (SSL_is_init_finished(conn->ssl) && appl_data && in_data) 2482 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data)); 2483 2484 return out_data; 2485 } 2486 2487 2488 struct wpabuf * 2489 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn, 2490 const struct wpabuf *in_data, 2491 struct wpabuf **appl_data) 2492 { 2493 return openssl_connection_handshake(conn, in_data, appl_data, 0); 2494 } 2495 2496 2497 struct wpabuf * tls_connection_server_handshake(void *tls_ctx, 2498 struct tls_connection *conn, 2499 const struct wpabuf *in_data, 2500 struct wpabuf **appl_data) 2501 { 2502 return openssl_connection_handshake(conn, in_data, appl_data, 1); 2503 } 2504 2505 2506 struct wpabuf * tls_connection_encrypt(void *tls_ctx, 2507 struct tls_connection *conn, 2508 const struct wpabuf *in_data) 2509 { 2510 int res; 2511 struct wpabuf *buf; 2512 2513 if (conn == NULL) 2514 return NULL; 2515 2516 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */ 2517 if ((res = BIO_reset(conn->ssl_in)) < 0 || 2518 (res = BIO_reset(conn->ssl_out)) < 0) { 2519 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 2520 return NULL; 2521 } 2522 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data)); 2523 if (res < 0) { 2524 tls_show_errors(MSG_INFO, __func__, 2525 "Encryption failed - SSL_write"); 2526 return NULL; 2527 } 2528 2529 /* Read encrypted data to be sent to the server */ 2530 buf = wpabuf_alloc(wpabuf_len(in_data) + 300); 2531 if (buf == NULL) 2532 return NULL; 2533 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf)); 2534 if (res < 0) { 2535 tls_show_errors(MSG_INFO, __func__, 2536 "Encryption failed - BIO_read"); 2537 wpabuf_free(buf); 2538 return NULL; 2539 } 2540 wpabuf_put(buf, res); 2541 2542 return buf; 2543 } 2544 2545 2546 struct wpabuf * tls_connection_decrypt(void *tls_ctx, 2547 struct tls_connection *conn, 2548 const struct wpabuf *in_data) 2549 { 2550 int res; 2551 struct wpabuf *buf; 2552 2553 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */ 2554 res = BIO_write(conn->ssl_in, wpabuf_head(in_data), 2555 wpabuf_len(in_data)); 2556 if (res < 0) { 2557 tls_show_errors(MSG_INFO, __func__, 2558 "Decryption failed - BIO_write"); 2559 return NULL; 2560 } 2561 if (BIO_reset(conn->ssl_out) < 0) { 2562 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); 2563 return NULL; 2564 } 2565 2566 /* Read decrypted data for further processing */ 2567 /* 2568 * Even though we try to disable TLS compression, it is possible that 2569 * this cannot be done with all TLS libraries. Add extra buffer space 2570 * to handle the possibility of the decrypted data being longer than 2571 * input data. 2572 */ 2573 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); 2574 if (buf == NULL) 2575 return NULL; 2576 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf)); 2577 if (res < 0) { 2578 tls_show_errors(MSG_INFO, __func__, 2579 "Decryption failed - SSL_read"); 2580 wpabuf_free(buf); 2581 return NULL; 2582 } 2583 wpabuf_put(buf, res); 2584 2585 return buf; 2586 } 2587 2588 2589 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) 2590 { 2591 return conn ? conn->ssl->hit : 0; 2592 } 2593 2594 2595 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, 2596 u8 *ciphers) 2597 { 2598 char buf[100], *pos, *end; 2599 u8 *c; 2600 int ret; 2601 2602 if (conn == NULL || conn->ssl == NULL || ciphers == NULL) 2603 return -1; 2604 2605 buf[0] = '\0'; 2606 pos = buf; 2607 end = pos + sizeof(buf); 2608 2609 c = ciphers; 2610 while (*c != TLS_CIPHER_NONE) { 2611 const char *suite; 2612 2613 switch (*c) { 2614 case TLS_CIPHER_RC4_SHA: 2615 suite = "RC4-SHA"; 2616 break; 2617 case TLS_CIPHER_AES128_SHA: 2618 suite = "AES128-SHA"; 2619 break; 2620 case TLS_CIPHER_RSA_DHE_AES128_SHA: 2621 suite = "DHE-RSA-AES128-SHA"; 2622 break; 2623 case TLS_CIPHER_ANON_DH_AES128_SHA: 2624 suite = "ADH-AES128-SHA"; 2625 break; 2626 default: 2627 wpa_printf(MSG_DEBUG, "TLS: Unsupported " 2628 "cipher selection: %d", *c); 2629 return -1; 2630 } 2631 ret = os_snprintf(pos, end - pos, ":%s", suite); 2632 if (ret < 0 || ret >= end - pos) 2633 break; 2634 pos += ret; 2635 2636 c++; 2637 } 2638 2639 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1); 2640 2641 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) { 2642 tls_show_errors(MSG_INFO, __func__, 2643 "Cipher suite configuration failed"); 2644 return -1; 2645 } 2646 2647 return 0; 2648 } 2649 2650 2651 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, 2652 char *buf, size_t buflen) 2653 { 2654 const char *name; 2655 if (conn == NULL || conn->ssl == NULL) 2656 return -1; 2657 2658 name = SSL_get_cipher(conn->ssl); 2659 if (name == NULL) 2660 return -1; 2661 2662 os_strlcpy(buf, name, buflen); 2663 return 0; 2664 } 2665 2666 2667 int tls_connection_enable_workaround(void *ssl_ctx, 2668 struct tls_connection *conn) 2669 { 2670 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); 2671 2672 return 0; 2673 } 2674 2675 2676 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2677 /* ClientHello TLS extensions require a patch to openssl, so this function is 2678 * commented out unless explicitly needed for EAP-FAST in order to be able to 2679 * build this file with unmodified openssl. */ 2680 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, 2681 int ext_type, const u8 *data, 2682 size_t data_len) 2683 { 2684 if (conn == NULL || conn->ssl == NULL || ext_type != 35) 2685 return -1; 2686 2687 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2688 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data, 2689 data_len) != 1) 2690 return -1; 2691 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2692 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data, 2693 data_len) != 1) 2694 return -1; 2695 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2696 2697 return 0; 2698 } 2699 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 2700 2701 2702 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) 2703 { 2704 if (conn == NULL) 2705 return -1; 2706 return conn->failed; 2707 } 2708 2709 2710 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) 2711 { 2712 if (conn == NULL) 2713 return -1; 2714 return conn->read_alerts; 2715 } 2716 2717 2718 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) 2719 { 2720 if (conn == NULL) 2721 return -1; 2722 return conn->write_alerts; 2723 } 2724 2725 2726 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 2727 const struct tls_connection_params *params) 2728 { 2729 int ret; 2730 unsigned long err; 2731 2732 if (conn == NULL) 2733 return -1; 2734 2735 while ((err = ERR_get_error())) { 2736 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 2737 __func__, ERR_error_string(err, NULL)); 2738 } 2739 2740 if (params->engine) { 2741 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine"); 2742 ret = tls_engine_init(conn, params->engine_id, params->pin, 2743 params->key_id, params->cert_id, 2744 params->ca_cert_id); 2745 if (ret) 2746 return ret; 2747 } 2748 if (tls_connection_set_subject_match(conn, 2749 params->subject_match, 2750 params->altsubject_match)) 2751 return -1; 2752 2753 if (params->engine && params->ca_cert_id) { 2754 if (tls_connection_engine_ca_cert(tls_ctx, conn, 2755 params->ca_cert_id)) 2756 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2757 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert, 2758 params->ca_cert_blob, 2759 params->ca_cert_blob_len, 2760 params->ca_path)) 2761 return -1; 2762 2763 if (params->engine && params->cert_id) { 2764 if (tls_connection_engine_client_cert(conn, params->cert_id)) 2765 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2766 } else if (tls_connection_client_cert(conn, params->client_cert, 2767 params->client_cert_blob, 2768 params->client_cert_blob_len)) 2769 return -1; 2770 2771 if (params->engine && params->key_id) { 2772 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine"); 2773 if (tls_connection_engine_private_key(conn)) 2774 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; 2775 } else if (tls_connection_private_key(tls_ctx, conn, 2776 params->private_key, 2777 params->private_key_passwd, 2778 params->private_key_blob, 2779 params->private_key_blob_len)) { 2780 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'", 2781 params->private_key); 2782 return -1; 2783 } 2784 2785 if (tls_connection_dh(conn, params->dh_file)) { 2786 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 2787 params->dh_file); 2788 return -1; 2789 } 2790 2791 #ifdef SSL_OP_NO_TICKET 2792 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) 2793 SSL_set_options(conn->ssl, SSL_OP_NO_TICKET); 2794 else 2795 SSL_clear_options(conn->ssl, SSL_OP_NO_TICKET); 2796 #endif /* SSL_OP_NO_TICKET */ 2797 2798 conn->flags = params->flags; 2799 2800 tls_get_errors(tls_ctx); 2801 2802 return 0; 2803 } 2804 2805 2806 int tls_global_set_params(void *tls_ctx, 2807 const struct tls_connection_params *params) 2808 { 2809 SSL_CTX *ssl_ctx = tls_ctx; 2810 unsigned long err; 2811 2812 while ((err = ERR_get_error())) { 2813 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", 2814 __func__, ERR_error_string(err, NULL)); 2815 } 2816 2817 if (tls_global_ca_cert(ssl_ctx, params->ca_cert)) 2818 return -1; 2819 2820 if (tls_global_client_cert(ssl_ctx, params->client_cert)) 2821 return -1; 2822 2823 if (tls_global_private_key(ssl_ctx, params->private_key, 2824 params->private_key_passwd)) 2825 return -1; 2826 2827 if (tls_global_dh(ssl_ctx, params->dh_file)) { 2828 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", 2829 params->dh_file); 2830 return -1; 2831 } 2832 2833 #ifdef SSL_OP_NO_TICKET 2834 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) 2835 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET); 2836 else 2837 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET); 2838 #endif /* SSL_OP_NO_TICKET */ 2839 2840 return 0; 2841 } 2842 2843 2844 int tls_connection_get_keyblock_size(void *tls_ctx, 2845 struct tls_connection *conn) 2846 { 2847 const EVP_CIPHER *c; 2848 const EVP_MD *h; 2849 int md_size; 2850 2851 if (conn == NULL || conn->ssl == NULL || 2852 conn->ssl->enc_read_ctx == NULL || 2853 conn->ssl->enc_read_ctx->cipher == NULL || 2854 conn->ssl->read_hash == NULL) 2855 return -1; 2856 2857 c = conn->ssl->enc_read_ctx->cipher; 2858 #if OPENSSL_VERSION_NUMBER >= 0x00909000L 2859 h = EVP_MD_CTX_md(conn->ssl->read_hash); 2860 #else 2861 h = conn->ssl->read_hash; 2862 #endif 2863 if (h) 2864 md_size = EVP_MD_size(h); 2865 #if OPENSSL_VERSION_NUMBER >= 0x10000000L 2866 else if (conn->ssl->s3) 2867 md_size = conn->ssl->s3->tmp.new_mac_secret_size; 2868 #endif 2869 else 2870 return -1; 2871 2872 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d " 2873 "IV_len=%d", EVP_CIPHER_key_length(c), md_size, 2874 EVP_CIPHER_iv_length(c)); 2875 return 2 * (EVP_CIPHER_key_length(c) + 2876 md_size + 2877 EVP_CIPHER_iv_length(c)); 2878 } 2879 2880 2881 unsigned int tls_capabilities(void *tls_ctx) 2882 { 2883 return 0; 2884 } 2885 2886 2887 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 2888 /* Pre-shared secred requires a patch to openssl, so this function is 2889 * commented out unless explicitly needed for EAP-FAST in order to be able to 2890 * build this file with unmodified openssl. */ 2891 2892 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, 2893 STACK_OF(SSL_CIPHER) *peer_ciphers, 2894 SSL_CIPHER **cipher, void *arg) 2895 { 2896 struct tls_connection *conn = arg; 2897 int ret; 2898 2899 if (conn == NULL || conn->session_ticket_cb == NULL) 2900 return 0; 2901 2902 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, 2903 conn->session_ticket, 2904 conn->session_ticket_len, 2905 s->s3->client_random, 2906 s->s3->server_random, secret); 2907 os_free(conn->session_ticket); 2908 conn->session_ticket = NULL; 2909 2910 if (ret <= 0) 2911 return 0; 2912 2913 *secret_len = SSL_MAX_MASTER_KEY_LENGTH; 2914 return 1; 2915 } 2916 2917 2918 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 2919 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data, 2920 int len, void *arg) 2921 { 2922 struct tls_connection *conn = arg; 2923 2924 if (conn == NULL || conn->session_ticket_cb == NULL) 2925 return 0; 2926 2927 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len); 2928 2929 os_free(conn->session_ticket); 2930 conn->session_ticket = NULL; 2931 2932 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2933 "extension", data, len); 2934 2935 conn->session_ticket = os_malloc(len); 2936 if (conn->session_ticket == NULL) 2937 return 0; 2938 2939 os_memcpy(conn->session_ticket, data, len); 2940 conn->session_ticket_len = len; 2941 2942 return 1; 2943 } 2944 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 2945 #ifdef SSL_OP_NO_TICKET 2946 static void tls_hello_ext_cb(SSL *s, int client_server, int type, 2947 unsigned char *data, int len, void *arg) 2948 { 2949 struct tls_connection *conn = arg; 2950 2951 if (conn == NULL || conn->session_ticket_cb == NULL) 2952 return; 2953 2954 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, 2955 type, len); 2956 2957 if (type == TLSEXT_TYPE_session_ticket && !client_server) { 2958 os_free(conn->session_ticket); 2959 conn->session_ticket = NULL; 2960 2961 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2962 "extension", data, len); 2963 conn->session_ticket = os_malloc(len); 2964 if (conn->session_ticket == NULL) 2965 return; 2966 2967 os_memcpy(conn->session_ticket, data, len); 2968 conn->session_ticket_len = len; 2969 } 2970 } 2971 #else /* SSL_OP_NO_TICKET */ 2972 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg) 2973 { 2974 struct tls_connection *conn = arg; 2975 2976 if (conn == NULL || conn->session_ticket_cb == NULL) 2977 return 0; 2978 2979 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, 2980 ext->type, ext->length); 2981 2982 os_free(conn->session_ticket); 2983 conn->session_ticket = NULL; 2984 2985 if (ext->type == 35) { 2986 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " 2987 "extension", ext->data, ext->length); 2988 conn->session_ticket = os_malloc(ext->length); 2989 if (conn->session_ticket == NULL) 2990 return SSL_AD_INTERNAL_ERROR; 2991 2992 os_memcpy(conn->session_ticket, ext->data, ext->length); 2993 conn->session_ticket_len = ext->length; 2994 } 2995 2996 return 0; 2997 } 2998 #endif /* SSL_OP_NO_TICKET */ 2999 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 3000 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 3001 3002 3003 int tls_connection_set_session_ticket_cb(void *tls_ctx, 3004 struct tls_connection *conn, 3005 tls_session_ticket_cb cb, 3006 void *ctx) 3007 { 3008 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) 3009 conn->session_ticket_cb = cb; 3010 conn->session_ticket_cb_ctx = ctx; 3011 3012 if (cb) { 3013 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb, 3014 conn) != 1) 3015 return -1; 3016 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 3017 SSL_set_session_ticket_ext_cb(conn->ssl, 3018 tls_session_ticket_ext_cb, conn); 3019 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 3020 #ifdef SSL_OP_NO_TICKET 3021 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb); 3022 SSL_set_tlsext_debug_arg(conn->ssl, conn); 3023 #else /* SSL_OP_NO_TICKET */ 3024 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb, 3025 conn) != 1) 3026 return -1; 3027 #endif /* SSL_OP_NO_TICKET */ 3028 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 3029 } else { 3030 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1) 3031 return -1; 3032 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE 3033 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL); 3034 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 3035 #ifdef SSL_OP_NO_TICKET 3036 SSL_set_tlsext_debug_callback(conn->ssl, NULL); 3037 SSL_set_tlsext_debug_arg(conn->ssl, conn); 3038 #else /* SSL_OP_NO_TICKET */ 3039 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1) 3040 return -1; 3041 #endif /* SSL_OP_NO_TICKET */ 3042 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ 3043 } 3044 3045 return 0; 3046 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 3047 return -1; 3048 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ 3049 } 3050
