contrib/wpa/src/crypto/tls_openssl.c

   1 /*
   2  * WPA Supplicant / SSL/TLS interface functions for openssl
   3  * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #ifndef CONFIG_SMARTCARD
  18 #ifndef OPENSSL_NO_ENGINE
  19 #define OPENSSL_NO_ENGINE
  20 #endif
  21 #endif
  22
  23 #include <openssl/ssl.h>
  24 #include <openssl/err.h>
  25 #include <openssl/pkcs12.h>
  26 #include <openssl/x509v3.h>
  27 #ifndef OPENSSL_NO_ENGINE
  28 #include <openssl/engine.h>
  29 #endif /* OPENSSL_NO_ENGINE */
  30
  31 #include "common.h"
  32 #include "tls.h"
  33
  34 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
  35 #define OPENSSL_d2i_TYPE const unsigned char **
  36 #else
  37 #define OPENSSL_d2i_TYPE unsigned char **
  38 #endif
  39
  40 #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT
  41 #ifdef SSL_OP_NO_TICKET
  42 /*
  43  * Session ticket override patch was merged into OpenSSL 0.9.9 tree on
  44  * 2008-11-15. This version uses a bit different API compared to the old patch.
  45  */
  46 #define CONFIG_OPENSSL_TICKET_OVERRIDE
  47 #endif
  48 #endif
  49
  50 static int tls_openssl_ref_count = 0;
  51
  52 struct tls_connection {
  53         SSL *ssl;
  54         BIO *ssl_in, *ssl_out;
  55 #ifndef OPENSSL_NO_ENGINE
  56         ENGINE *engine;        /* functional reference to the engine */
  57         EVP_PKEY *private_key; /* the private key if using engine */
  58 #endif /* OPENSSL_NO_ENGINE */
  59         char *subject_match, *altsubject_match;
  60         int read_alerts, write_alerts, failed;
  61
  62         tls_session_ticket_cb session_ticket_cb;
  63         void *session_ticket_cb_ctx;
  64
  65         /* SessionTicket received from OpenSSL hello_extension_cb (server) */
  66         u8 *session_ticket;
  67         size_t session_ticket_len;
  68 };
  69
  70
  71 #ifdef CONFIG_NO_STDOUT_DEBUG
  72
  73 static void _tls_show_errors(void)
  74 {
  75         unsigned long err;
  76
  77         while ((err = ERR_get_error())) {
  78                 /* Just ignore the errors, since stdout is disabled */
  79         }
  80 }
  81 #define tls_show_errors(l, f, t) _tls_show_errors()
  82
  83 #else /* CONFIG_NO_STDOUT_DEBUG */
  84
  85 static void tls_show_errors(int level, const char *func, const char *txt)
  86 {
  87         unsigned long err;
  88
  89         wpa_printf(level, "OpenSSL: %s - %s %s",
  90                    func, txt, ERR_error_string(ERR_get_error(), NULL));
  91
  92         while ((err = ERR_get_error())) {
  93                 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
  94                            ERR_error_string(err, NULL));
  95         }
  96 }
  97
  98 #endif /* CONFIG_NO_STDOUT_DEBUG */
  99
 100
 101 #ifdef CONFIG_NATIVE_WINDOWS
 102
 103 /* Windows CryptoAPI and access to certificate stores */
 104 #include <wincrypt.h>
 105
 106 #ifdef __MINGW32_VERSION
 107 /*
 108  * MinGW does not yet include all the needed definitions for CryptoAPI, so
 109  * define here whatever extra is needed.
 110  */
 111 #define CALG_SSL3_SHAMD5 (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SSL3SHAMD5)
 112 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
 113 #define CERT_STORE_READONLY_FLAG 0x00008000
 114 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
 115 #define CRYPT_ACQUIRE_COMPARE_KEY_FLAG 0x00000004
 116
 117 static BOOL WINAPI
 118 (*CryptAcquireCertificatePrivateKey)(PCCERT_CONTEXT pCert, DWORD dwFlags,
 119                                      void *pvReserved, HCRYPTPROV *phCryptProv,
 120                                      DWORD *pdwKeySpec, BOOL *pfCallerFreeProv)
 121 = NULL; /* to be loaded from crypt32.dll */
 122
 123 #ifdef CONFIG_MINGW32_LOAD_CERTENUM
 124 static PCCERT_CONTEXT WINAPI
 125 (*CertEnumCertificatesInStore)(HCERTSTORE hCertStore,
 126                                PCCERT_CONTEXT pPrevCertContext)
 127 = NULL; /* to be loaded from crypt32.dll */
 128 #endif /* CONFIG_MINGW32_LOAD_CERTENUM */
 129
 130 static int mingw_load_crypto_func(void)
 131 {
 132         HINSTANCE dll;
 133
 134         /* MinGW does not yet have full CryptoAPI support, so load the needed
 135          * function here. */
 136
 137         if (CryptAcquireCertificatePrivateKey)
 138                 return 0;
 139
 140         dll = LoadLibrary("crypt32");
 141         if (dll == NULL) {
 142                 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not load crypt32 "
 143                            "library");
 144                 return -1;
 145         }
 146
 147         CryptAcquireCertificatePrivateKey = GetProcAddress(
 148                 dll, "CryptAcquireCertificatePrivateKey");
 149         if (CryptAcquireCertificatePrivateKey == NULL) {
 150                 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
 151                            "CryptAcquireCertificatePrivateKey() address from "
 152                            "crypt32 library");
 153                 return -1;
 154         }
 155
 156 #ifdef CONFIG_MINGW32_LOAD_CERTENUM
 157         CertEnumCertificatesInStore = (void *) GetProcAddress(
 158                 dll, "CertEnumCertificatesInStore");
 159         if (CertEnumCertificatesInStore == NULL) {
 160                 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
 161                            "CertEnumCertificatesInStore() address from "
 162                            "crypt32 library");
 163                 return -1;
 164         }
 165 #endif /* CONFIG_MINGW32_LOAD_CERTENUM */
 166
 167         return 0;
 168 }
 169
 170 #else /* __MINGW32_VERSION */
 171
 172 static int mingw_load_crypto_func(void)
 173 {
 174         return 0;
 175 }
 176
 177 #endif /* __MINGW32_VERSION */
 178
 179
 180 struct cryptoapi_rsa_data {
 181         const CERT_CONTEXT *cert;
 182         HCRYPTPROV crypt_prov;
 183         DWORD key_spec;
 184         BOOL free_crypt_prov;
 185 };
 186
 187
 188 static void cryptoapi_error(const char *msg)
 189 {
 190         wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
 191                    msg, (unsigned int) GetLastError());
 192 }
 193
 194
 195 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
 196                                  unsigned char *to, RSA *rsa, int padding)
 197 {
 198         wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
 199         return 0;
 200 }
 201
 202
 203 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
 204                                  unsigned char *to, RSA *rsa, int padding)
 205 {
 206         wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
 207         return 0;
 208 }
 209
 210
 211 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
 212                                   unsigned char *to, RSA *rsa, int padding)
 213 {
 214         struct cryptoapi_rsa_data *priv =
 215                 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
 216         HCRYPTHASH hash;
 217         DWORD hash_size, len, i;
 218         unsigned char *buf = NULL;
 219         int ret = 0;
 220
 221         if (priv == NULL) {
 222                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 223                        ERR_R_PASSED_NULL_PARAMETER);
 224                 return 0;
 225         }
 226
 227         if (padding != RSA_PKCS1_PADDING) {
 228                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 229                        RSA_R_UNKNOWN_PADDING_TYPE);
 230                 return 0;
 231         }
 232
 233         if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
 234                 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
 235                            __func__);
 236                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 237                        RSA_R_INVALID_MESSAGE_LENGTH);
 238                 return 0;
 239         }
 240
 241         if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
 242         {
 243                 cryptoapi_error("CryptCreateHash failed");
 244                 return 0;
 245         }
 246
 247         len = sizeof(hash_size);
 248         if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
 249                                0)) {
 250                 cryptoapi_error("CryptGetHashParam failed");
 251                 goto err;
 252         }
 253
 254         if ((int) hash_size != flen) {
 255                 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
 256                            (unsigned) hash_size, flen);
 257                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
 258                        RSA_R_INVALID_MESSAGE_LENGTH);
 259                 goto err;
 260         }
 261         if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
 262                 cryptoapi_error("CryptSetHashParam failed");
 263                 goto err;
 264         }
 265
 266         len = RSA_size(rsa);
 267         buf = os_malloc(len);
 268         if (buf == NULL) {
 269                 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
 270                 goto err;
 271         }
 272
 273         if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
 274                 cryptoapi_error("CryptSignHash failed");
 275                 goto err;
 276         }
 277
 278         for (i = 0; i < len; i++)
 279                 to[i] = buf[len - i - 1];
 280         ret = len;
 281
 282 err:
 283         os_free(buf);
 284         CryptDestroyHash(hash);
 285
 286         return ret;
 287 }
 288
 289
 290 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
 291                                   unsigned char *to, RSA *rsa, int padding)
 292 {
 293         wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
 294         return 0;
 295 }
 296
 297
 298 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
 299 {
 300         if (priv == NULL)
 301                 return;
 302         if (priv->crypt_prov && priv->free_crypt_prov)
 303                 CryptReleaseContext(priv->crypt_prov, 0);
 304         if (priv->cert)
 305                 CertFreeCertificateContext(priv->cert);
 306         os_free(priv);
 307 }
 308
 309
 310 static int cryptoapi_finish(RSA *rsa)
 311 {
 312         cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
 313         os_free((void *) rsa->meth);
 314         rsa->meth = NULL;
 315         return 1;
 316 }
 317
 318
 319 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
 320 {
 321         HCERTSTORE cs;
 322         const CERT_CONTEXT *ret = NULL;
 323
 324         cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
 325                            store | CERT_STORE_OPEN_EXISTING_FLAG |
 326                            CERT_STORE_READONLY_FLAG, L"MY");
 327         if (cs == NULL) {
 328                 cryptoapi_error("Failed to open 'My system store'");
 329                 return NULL;
 330         }
 331
 332         if (strncmp(name, "cert://", 7) == 0) {
 333                 unsigned short wbuf[255];
 334                 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
 335                 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
 336                                                  PKCS_7_ASN_ENCODING,
 337                                                  0, CERT_FIND_SUBJECT_STR,
 338                                                  wbuf, NULL);
 339         } else if (strncmp(name, "hash://", 7) == 0) {
 340                 CRYPT_HASH_BLOB blob;
 341                 int len;
 342                 const char *hash = name + 7;
 343                 unsigned char *buf;
 344
 345                 len = os_strlen(hash) / 2;
 346                 buf = os_malloc(len);
 347                 if (buf && hexstr2bin(hash, buf, len) == 0) {
 348                         blob.cbData = len;
 349                         blob.pbData = buf;
 350                         ret = CertFindCertificateInStore(cs,
 351                                                          X509_ASN_ENCODING |
 352                                                          PKCS_7_ASN_ENCODING,
 353                                                          0, CERT_FIND_HASH,
 354                                                          &blob, NULL);
 355                 }
 356                 os_free(buf);
 357         }
 358
 359         CertCloseStore(cs, 0);
 360
 361         return ret;
 362 }
 363
 364
 365 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
 366 {
 367         X509 *cert = NULL;
 368         RSA *rsa = NULL, *pub_rsa;
 369         struct cryptoapi_rsa_data *priv;
 370         RSA_METHOD *rsa_meth;
 371
 372         if (name == NULL ||
 373             (strncmp(name, "cert://", 7) != 0 &&
 374              strncmp(name, "hash://", 7) != 0))
 375                 return -1;
 376
 377         priv = os_zalloc(sizeof(*priv));
 378         rsa_meth = os_zalloc(sizeof(*rsa_meth));
 379         if (priv == NULL || rsa_meth == NULL) {
 380                 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
 381                            "for CryptoAPI RSA method");
 382                 os_free(priv);
 383                 os_free(rsa_meth);
 384                 return -1;
 385         }
 386
 387         priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
 388         if (priv->cert == NULL) {
 389                 priv->cert = cryptoapi_find_cert(
 390                         name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
 391         }
 392         if (priv->cert == NULL) {
 393                 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
 394                            "'%s'", name);
 395                 goto err;
 396         }
 397
 398         cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
 399                         priv->cert->cbCertEncoded);
 400         if (cert == NULL) {
 401                 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
 402                            "encoding");
 403                 goto err;
 404         }
 405
 406         if (mingw_load_crypto_func())
 407                 goto err;
 408
 409         if (!CryptAcquireCertificatePrivateKey(priv->cert,
 410                                                CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
 411                                                NULL, &priv->crypt_prov,
 412                                                &priv->key_spec,
 413                                                &priv->free_crypt_prov)) {
 414                 cryptoapi_error("Failed to acquire a private key for the "
 415                                 "certificate");
 416                 goto err;
 417         }
 418
 419         rsa_meth->name = "Microsoft CryptoAPI RSA Method";
 420         rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
 421         rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
 422         rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
 423         rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
 424         rsa_meth->finish = cryptoapi_finish;
 425         rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
 426         rsa_meth->app_data = (char *) priv;
 427
 428         rsa = RSA_new();
 429         if (rsa == NULL) {
 430                 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
 431                        ERR_R_MALLOC_FAILURE);
 432                 goto err;
 433         }
 434
 435         if (!SSL_use_certificate(ssl, cert)) {
 436                 RSA_free(rsa);
 437                 rsa = NULL;
 438                 goto err;
 439         }
 440         pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
 441         X509_free(cert);
 442         cert = NULL;
 443
 444         rsa->n = BN_dup(pub_rsa->n);
 445         rsa->e = BN_dup(pub_rsa->e);
 446         if (!RSA_set_method(rsa, rsa_meth))
 447                 goto err;
 448
 449         if (!SSL_use_RSAPrivateKey(ssl, rsa))
 450                 goto err;
 451         RSA_free(rsa);
 452
 453         return 0;
 454
 455 err:
 456         if (cert)
 457                 X509_free(cert);
 458         if (rsa)
 459                 RSA_free(rsa);
 460         else {
 461                 os_free(rsa_meth);
 462                 cryptoapi_free_data(priv);
 463         }
 464         return -1;
 465 }
 466
 467
 468 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
 469 {
 470         HCERTSTORE cs;
 471         PCCERT_CONTEXT ctx = NULL;
 472         X509 *cert;
 473         char buf[128];
 474         const char *store;
 475 #ifdef UNICODE
 476         WCHAR *wstore;
 477 #endif /* UNICODE */
 478
 479         if (mingw_load_crypto_func())
 480                 return -1;
 481
 482         if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
 483                 return -1;
 484
 485         store = name + 13;
 486 #ifdef UNICODE
 487         wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
 488         if (wstore == NULL)
 489                 return -1;
 490         wsprintf(wstore, L"%S", store);
 491         cs = CertOpenSystemStore(0, wstore);
 492         os_free(wstore);
 493 #else /* UNICODE */
 494         cs = CertOpenSystemStore(0, store);
 495 #endif /* UNICODE */
 496         if (cs == NULL) {
 497                 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
 498                            "'%s': error=%d", __func__, store,
 499                            (int) GetLastError());
 500                 return -1;
 501         }
 502
 503         while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
 504                 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
 505                                 ctx->cbCertEncoded);
 506                 if (cert == NULL) {
 507                         wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
 508                                    "X509 DER encoding for CA cert");
 509                         continue;
 510                 }
 511
 512                 X509_NAME_oneline(X509_get_subject_name(cert), buf,
 513                                   sizeof(buf));
 514                 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
 515                            "system certificate store: subject='%s'", buf);
 516
 517                 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
 518                         tls_show_errors(MSG_WARNING, __func__,
 519                                         "Failed to add ca_cert to OpenSSL "
 520                                         "certificate store");
 521                 }
 522
 523                 X509_free(cert);
 524         }
 525
 526         if (!CertCloseStore(cs, 0)) {
 527                 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
 528                            "'%s': error=%d", __func__, name + 13,
 529                            (int) GetLastError());
 530         }
 531
 532         return 0;
 533 }
 534
 535
 536 #else /* CONFIG_NATIVE_WINDOWS */
 537
 538 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
 539 {
 540         return -1;
 541 }
 542
 543 #endif /* CONFIG_NATIVE_WINDOWS */
 544
 545
 546 static void ssl_info_cb(const SSL *ssl, int where, int ret)
 547 {
 548         const char *str;
 549         int w;
 550
 551         wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
 552         w = where & ~SSL_ST_MASK;
 553         if (w & SSL_ST_CONNECT)
 554                 str = "SSL_connect";
 555         else if (w & SSL_ST_ACCEPT)
 556                 str = "SSL_accept";
 557         else
 558                 str = "undefined";
 559
 560         if (where & SSL_CB_LOOP) {
 561                 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
 562                            str, SSL_state_string_long(ssl));
 563         } else if (where & SSL_CB_ALERT) {
 564                 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
 565                            where & SSL_CB_READ ?
 566                            "read (remote end reported an error)" :
 567                            "write (local SSL3 detected an error)",
 568                            SSL_alert_type_string_long(ret),
 569                            SSL_alert_desc_string_long(ret));
 570                 if ((ret >> 8) == SSL3_AL_FATAL) {
 571                         struct tls_connection *conn =
 572                                 SSL_get_app_data((SSL *) ssl);
 573                         if (where & SSL_CB_READ)
 574                                 conn->read_alerts++;
 575                         else
 576                                 conn->write_alerts++;
 577                 }
 578         } else if (where & SSL_CB_EXIT && ret <= 0) {
 579                 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
 580                            str, ret == 0 ? "failed" : "error",
 581                            SSL_state_string_long(ssl));
 582         }
 583 }
 584
 585
 586 #ifndef OPENSSL_NO_ENGINE
 587 /**
 588  * tls_engine_load_dynamic_generic - load any openssl engine
 589  * @pre: an array of commands and values that load an engine initialized
 590  *       in the engine specific function
 591  * @post: an array of commands and values that initialize an already loaded
 592  *        engine (or %NULL if not required)
 593  * @id: the engine id of the engine to load (only required if post is not %NULL
 594  *
 595  * This function is a generic function that loads any openssl engine.
 596  *
 597  * Returns: 0 on success, -1 on failure
 598  */
 599 static int tls_engine_load_dynamic_generic(const char *pre[],
 600                                            const char *post[], const char *id)
 601 {
 602         ENGINE *engine;
 603         const char *dynamic_id = "dynamic";
 604
 605         engine = ENGINE_by_id(id);
 606         if (engine) {
 607                 ENGINE_free(engine);
 608                 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
 609                            "available", id);
 610                 return 0;
 611         }
 612         ERR_clear_error();
 613
 614         engine = ENGINE_by_id(dynamic_id);
 615         if (engine == NULL) {
 616                 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
 617                            dynamic_id,
 618                            ERR_error_string(ERR_get_error(), NULL));
 619                 return -1;
 620         }
 621
 622         /* Perform the pre commands. This will load the engine. */
 623         while (pre && pre[0]) {
 624                 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
 625                 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
 626                         wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
 627                                    "%s %s [%s]", pre[0], pre[1],
 628                                    ERR_error_string(ERR_get_error(), NULL));
 629                         ENGINE_free(engine);
 630                         return -1;
 631                 }
 632                 pre += 2;
 633         }
 634
 635         /*
 636          * Free the reference to the "dynamic" engine. The loaded engine can
 637          * now be looked up using ENGINE_by_id().
 638          */
 639         ENGINE_free(engine);
 640
 641         engine = ENGINE_by_id(id);
 642         if (engine == NULL) {
 643                 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
 644                            id, ERR_error_string(ERR_get_error(), NULL));
 645                 return -1;
 646         }
 647
 648         while (post && post[0]) {
 649                 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
 650                 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
 651                         wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
 652                                 " %s %s [%s]", post[0], post[1],
 653                                    ERR_error_string(ERR_get_error(), NULL));
 654                         ENGINE_remove(engine);
 655                         ENGINE_free(engine);
 656                         return -1;
 657                 }
 658                 post += 2;
 659         }
 660         ENGINE_free(engine);
 661
 662         return 0;
 663 }
 664
 665
 666 /**
 667  * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
 668  * @pkcs11_so_path: pksc11_so_path from the configuration
 669  * @pcks11_module_path: pkcs11_module_path from the configuration
 670  */
 671 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
 672                                           const char *pkcs11_module_path)
 673 {
 674         char *engine_id = "pkcs11";
 675         const char *pre_cmd[] = {
 676                 "SO_PATH", NULL /* pkcs11_so_path */,
 677                 "ID", NULL /* engine_id */,
 678                 "LIST_ADD", "1",
 679                 /* "NO_VCHECK", "1", */
 680                 "LOAD", NULL,
 681                 NULL, NULL
 682         };
 683         const char *post_cmd[] = {
 684                 "MODULE_PATH", NULL /* pkcs11_module_path */,
 685                 NULL, NULL
 686         };
 687
 688         if (!pkcs11_so_path || !pkcs11_module_path)
 689                 return 0;
 690
 691         pre_cmd[1] = pkcs11_so_path;
 692         pre_cmd[3] = engine_id;
 693         post_cmd[1] = pkcs11_module_path;
 694
 695         wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
 696                    pkcs11_so_path);
 697
 698         return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
 699 }
 700
 701
 702 /**
 703  * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
 704  * @opensc_so_path: opensc_so_path from the configuration
 705  */
 706 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
 707 {
 708         char *engine_id = "opensc";
 709         const char *pre_cmd[] = {
 710                 "SO_PATH", NULL /* opensc_so_path */,
 711                 "ID", NULL /* engine_id */,
 712                 "LIST_ADD", "1",
 713                 "LOAD", NULL,
 714                 NULL, NULL
 715         };
 716
 717         if (!opensc_so_path)
 718                 return 0;
 719
 720         pre_cmd[1] = opensc_so_path;
 721         pre_cmd[3] = engine_id;
 722
 723         wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
 724                    opensc_so_path);
 725
 726         return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
 727 }
 728 #endif /* OPENSSL_NO_ENGINE */
 729
 730
 731 void * tls_init(const struct tls_config *conf)
 732 {
 733         SSL_CTX *ssl;
 734
 735         if (tls_openssl_ref_count == 0) {
 736                 SSL_load_error_strings();
 737                 SSL_library_init();
 738                 /* TODO: if /dev/urandom is available, PRNG is seeded
 739                  * automatically. If this is not the case, random data should
 740                  * be added here. */
 741
 742 #ifdef PKCS12_FUNCS
 743                 PKCS12_PBE_add();
 744 #endif  /* PKCS12_FUNCS */
 745         }
 746         tls_openssl_ref_count++;
 747
 748         ssl = SSL_CTX_new(TLSv1_method());
 749         if (ssl == NULL)
 750                 return NULL;
 751
 752         SSL_CTX_set_info_callback(ssl, ssl_info_cb);
 753
 754 #ifndef OPENSSL_NO_ENGINE
 755         if (conf &&
 756             (conf->opensc_engine_path || conf->pkcs11_engine_path ||
 757              conf->pkcs11_module_path)) {
 758                 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
 759                 ERR_load_ENGINE_strings();
 760                 ENGINE_load_dynamic();
 761
 762                 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
 763                     tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
 764                                                    conf->pkcs11_module_path)) {
 765                         tls_deinit(ssl);
 766                         return NULL;
 767                 }
 768         }
 769 #endif /* OPENSSL_NO_ENGINE */
 770
 771         return ssl;
 772 }
 773
 774
 775 void tls_deinit(void *ssl_ctx)
 776 {
 777         SSL_CTX *ssl = ssl_ctx;
 778         SSL_CTX_free(ssl);
 779
 780         tls_openssl_ref_count--;
 781         if (tls_openssl_ref_count == 0) {
 782 #ifndef OPENSSL_NO_ENGINE
 783                 ENGINE_cleanup();
 784 #endif /* OPENSSL_NO_ENGINE */
 785                 CRYPTO_cleanup_all_ex_data();
 786                 ERR_remove_state(0);
 787                 ERR_free_strings();
 788                 EVP_cleanup();
 789         }
 790 }
 791
 792
 793 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
 794                            const char *pin, const char *key_id,
 795                            const char *cert_id, const char *ca_cert_id)
 796 {
 797 #ifndef OPENSSL_NO_ENGINE
 798         int ret = -1;
 799         if (engine_id == NULL) {
 800                 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
 801                 return -1;
 802         }
 803         if (pin == NULL) {
 804                 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
 805                 return -1;
 806         }
 807         if (key_id == NULL) {
 808                 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
 809                 return -1;
 810         }
 811
 812         ERR_clear_error();
 813         conn->engine = ENGINE_by_id(engine_id);
 814         if (!conn->engine) {
 815                 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
 816                            engine_id, ERR_error_string(ERR_get_error(), NULL));
 817                 goto err;
 818         }
 819         if (ENGINE_init(conn->engine) != 1) {
 820                 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
 821                            "(engine: %s) [%s]", engine_id,
 822                            ERR_error_string(ERR_get_error(), NULL));
 823                 goto err;
 824         }
 825         wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
 826
 827         if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
 828                 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
 829                            ERR_error_string(ERR_get_error(), NULL));
 830                 goto err;
 831         }
 832         /* load private key first in-case PIN is required for cert */
 833         conn->private_key = ENGINE_load_private_key(conn->engine,
 834                                                     key_id, NULL, NULL);
 835         if (!conn->private_key) {
 836                 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
 837                                 " '%s' [%s]", key_id,
 838                            ERR_error_string(ERR_get_error(), NULL));
 839                 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
 840                 goto err;
 841         }
 842
 843         /* handle a certificate and/or CA certificate */
 844         if (cert_id || ca_cert_id) {
 845                 const char *cmd_name = "LOAD_CERT_CTRL";
 846
 847                 /* test if the engine supports a LOAD_CERT_CTRL */
 848                 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
 849                                  0, (void *)cmd_name, NULL)) {
 850                         wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
 851                                    " loading certificates");
 852                         ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
 853                         goto err;
 854                 }
 855         }
 856
 857         return 0;
 858
 859 err:
 860         if (conn->engine) {
 861                 ENGINE_free(conn->engine);
 862                 conn->engine = NULL;
 863         }
 864
 865         if (conn->private_key) {
 866                 EVP_PKEY_free(conn->private_key);
 867                 conn->private_key = NULL;
 868         }
 869
 870         return ret;
 871 #else /* OPENSSL_NO_ENGINE */
 872         return 0;
 873 #endif /* OPENSSL_NO_ENGINE */
 874 }
 875
 876
 877 static void tls_engine_deinit(struct tls_connection *conn)
 878 {
 879 #ifndef OPENSSL_NO_ENGINE
 880         wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
 881         if (conn->private_key) {
 882                 EVP_PKEY_free(conn->private_key);
 883                 conn->private_key = NULL;
 884         }
 885         if (conn->engine) {
 886                 ENGINE_finish(conn->engine);
 887                 conn->engine = NULL;
 888         }
 889 #endif /* OPENSSL_NO_ENGINE */
 890 }
 891
 892
 893 int tls_get_errors(void *ssl_ctx)
 894 {
 895         int count = 0;
 896         unsigned long err;
 897
 898         while ((err = ERR_get_error())) {
 899                 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
 900                            ERR_error_string(err, NULL));
 901                 count++;
 902         }
 903
 904         return count;
 905 }
 906
 907 struct tls_connection * tls_connection_init(void *ssl_ctx)
 908 {
 909         SSL_CTX *ssl = ssl_ctx;
 910         struct tls_connection *conn;
 911         long options;
 912
 913         conn = os_zalloc(sizeof(*conn));
 914         if (conn == NULL)
 915                 return NULL;
 916         conn->ssl = SSL_new(ssl);
 917         if (conn->ssl == NULL) {
 918                 tls_show_errors(MSG_INFO, __func__,
 919                                 "Failed to initialize new SSL connection");
 920                 os_free(conn);
 921                 return NULL;
 922         }
 923
 924         SSL_set_app_data(conn->ssl, conn);
 925         options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
 926                 SSL_OP_SINGLE_DH_USE;
 927 #ifdef SSL_OP_NO_COMPRESSION
 928         options |= SSL_OP_NO_COMPRESSION;
 929 #endif /* SSL_OP_NO_COMPRESSION */
 930         SSL_set_options(conn->ssl, options);
 931
 932         conn->ssl_in = BIO_new(BIO_s_mem());
 933         if (!conn->ssl_in) {
 934                 tls_show_errors(MSG_INFO, __func__,
 935                                 "Failed to create a new BIO for ssl_in");
 936                 SSL_free(conn->ssl);
 937                 os_free(conn);
 938                 return NULL;
 939         }
 940
 941         conn->ssl_out = BIO_new(BIO_s_mem());
 942         if (!conn->ssl_out) {
 943                 tls_show_errors(MSG_INFO, __func__,
 944                                 "Failed to create a new BIO for ssl_out");
 945                 SSL_free(conn->ssl);
 946                 BIO_free(conn->ssl_in);
 947                 os_free(conn);
 948                 return NULL;
 949         }
 950
 951         SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
 952
 953         return conn;
 954 }
 955
 956
 957 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
 958 {
 959         if (conn == NULL)
 960                 return;
 961         SSL_free(conn->ssl);
 962         tls_engine_deinit(conn);
 963         os_free(conn->subject_match);
 964         os_free(conn->altsubject_match);
 965         os_free(conn->session_ticket);
 966         os_free(conn);
 967 }
 968
 969
 970 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
 971 {
 972         return conn ? SSL_is_init_finished(conn->ssl) : 0;
 973 }
 974
 975
 976 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
 977 {
 978         if (conn == NULL)
 979                 return -1;
 980
 981         /* Shutdown previous TLS connection without notifying the peer
 982          * because the connection was already terminated in practice
 983          * and "close notify" shutdown alert would confuse AS. */
 984         SSL_set_quiet_shutdown(conn->ssl, 1);
 985         SSL_shutdown(conn->ssl);
 986         return 0;
 987 }
 988
 989
 990 static int tls_match_altsubject_component(X509 *cert, int type,
 991                                           const char *value, size_t len)
 992 {
 993         GENERAL_NAME *gen;
 994         void *ext;
 995         int i, found = 0;
 996
 997         ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
 998
 999         for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1000                 gen = sk_GENERAL_NAME_value(ext, i);
1001                 if (gen->type != type)
1002                         continue;
1003                 if (os_strlen((char *) gen->d.ia5->data) == len &&
1004                     os_memcmp(value, gen->d.ia5->data, len) == 0)
1005                         found++;
1006         }
1007
1008         return found;
1009 }
1010
1011
1012 static int tls_match_altsubject(X509 *cert, const char *match)
1013 {
1014         int type;
1015         const char *pos, *end;
1016         size_t len;
1017
1018         pos = match;
1019         do {
1020                 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1021                         type = GEN_EMAIL;
1022                         pos += 6;
1023                 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1024                         type = GEN_DNS;
1025                         pos += 4;
1026                 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1027                         type = GEN_URI;
1028                         pos += 4;
1029                 } else {
1030                         wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1031                                    "match '%s'", pos);
1032                         return 0;
1033                 }
1034                 end = os_strchr(pos, ';');
1035                 while (end) {
1036                         if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1037                             os_strncmp(end + 1, "DNS:", 4) == 0 ||
1038                             os_strncmp(end + 1, "URI:", 4) == 0)
1039                                 break;
1040                         end = os_strchr(end + 1, ';');
1041                 }
1042                 if (end)
1043                         len = end - pos;
1044                 else
1045                         len = os_strlen(pos);
1046                 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1047                         return 1;
1048                 pos = end + 1;
1049         } while (end);
1050
1051         return 0;
1052 }
1053
1054
1055 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1056 {
1057         char buf[256];
1058         X509 *err_cert;
1059         int err, depth;
1060         SSL *ssl;
1061         struct tls_connection *conn;
1062         char *match, *altmatch;
1063
1064         err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1065         err = X509_STORE_CTX_get_error(x509_ctx);
1066         depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1067         ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1068                                          SSL_get_ex_data_X509_STORE_CTX_idx());
1069         X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1070
1071         conn = SSL_get_app_data(ssl);
1072         match = conn ? conn->subject_match : NULL;
1073         altmatch = conn ? conn->altsubject_match : NULL;
1074
1075         if (!preverify_ok) {
1076                 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1077                            " error %d (%s) depth %d for '%s'", err,
1078                            X509_verify_cert_error_string(err), depth, buf);
1079         } else {
1080                 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
1081                            "preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
1082                            preverify_ok, err,
1083                            X509_verify_cert_error_string(err), depth, buf);
1084                 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1085                         wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1086                                    "match with '%s'", buf, match);
1087                         preverify_ok = 0;
1088                 } else if (depth == 0 && altmatch &&
1089                            !tls_match_altsubject(err_cert, altmatch)) {
1090                         wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1091                                    "'%s' not found", altmatch);
1092                         preverify_ok = 0;
1093                 }
1094         }
1095
1096         return preverify_ok;
1097 }
1098
1099
1100 #ifndef OPENSSL_NO_STDIO
1101 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1102 {
1103         SSL_CTX *ssl_ctx = _ssl_ctx;
1104         X509_LOOKUP *lookup;
1105         int ret = 0;
1106
1107         lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1108                                        X509_LOOKUP_file());
1109         if (lookup == NULL) {
1110                 tls_show_errors(MSG_WARNING, __func__,
1111                                 "Failed add lookup for X509 store");
1112                 return -1;
1113         }
1114
1115         if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1116                 unsigned long err = ERR_peek_error();
1117                 tls_show_errors(MSG_WARNING, __func__,
1118                                 "Failed load CA in DER format");
1119                 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1120                     ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1121                         wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1122                                    "cert already in hash table error",
1123                                    __func__);
1124                 } else
1125                         ret = -1;
1126         }
1127
1128         return ret;
1129 }
1130 #endif /* OPENSSL_NO_STDIO */
1131
1132
1133 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1134                                   const char *ca_cert, const u8 *ca_cert_blob,
1135                                   size_t ca_cert_blob_len, const char *ca_path)
1136 {
1137         SSL_CTX *ssl_ctx = _ssl_ctx;
1138
1139         /*
1140          * Remove previously configured trusted CA certificates before adding
1141          * new ones.
1142          */
1143         X509_STORE_free(ssl_ctx->cert_store);
1144         ssl_ctx->cert_store = X509_STORE_new();
1145         if (ssl_ctx->cert_store == NULL) {
1146                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1147                            "certificate store", __func__);
1148                 return -1;
1149         }
1150
1151         if (ca_cert_blob) {
1152                 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1153                                       ca_cert_blob_len);
1154                 if (cert == NULL) {
1155                         tls_show_errors(MSG_WARNING, __func__,
1156                                         "Failed to parse ca_cert_blob");
1157                         return -1;
1158                 }
1159
1160                 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1161                         unsigned long err = ERR_peek_error();
1162                         tls_show_errors(MSG_WARNING, __func__,
1163                                         "Failed to add ca_cert_blob to "
1164                                         "certificate store");
1165                         if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1166                             ERR_GET_REASON(err) ==
1167                             X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1168                                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1169                                            "cert already in hash table error",
1170                                            __func__);
1171                         } else {
1172                                 X509_free(cert);
1173                                 return -1;
1174                         }
1175                 }
1176                 X509_free(cert);
1177                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1178                            "to certificate store", __func__);
1179                 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1180                 return 0;
1181         }
1182
1183 #ifdef CONFIG_NATIVE_WINDOWS
1184         if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1185             0) {
1186                 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1187                            "system certificate store");
1188                 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1189                 return 0;
1190         }
1191 #endif /* CONFIG_NATIVE_WINDOWS */
1192
1193         if (ca_cert || ca_path) {
1194 #ifndef OPENSSL_NO_STDIO
1195                 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1196                     1) {
1197                         tls_show_errors(MSG_WARNING, __func__,
1198                                         "Failed to load root certificates");
1199                         if (ca_cert &&
1200                             tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1201                                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1202                                            "DER format CA certificate",
1203                                            __func__);
1204                         } else
1205                                 return -1;
1206                 } else {
1207                         wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1208                                    "certificate(s) loaded");
1209                         tls_get_errors(ssl_ctx);
1210                 }
1211                 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1212 #else /* OPENSSL_NO_STDIO */
1213                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1214                            __func__);
1215                 return -1;
1216 #endif /* OPENSSL_NO_STDIO */
1217         } else {
1218                 /* No ca_cert configured - do not try to verify server
1219                  * certificate */
1220                 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1221         }
1222
1223         return 0;
1224 }
1225
1226
1227 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1228 {
1229         if (ca_cert) {
1230                 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1231                 {
1232                         tls_show_errors(MSG_WARNING, __func__,
1233                                         "Failed to load root certificates");
1234                         return -1;
1235                 }
1236
1237                 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1238                            "certificate(s) loaded");
1239
1240 #ifndef OPENSSL_NO_STDIO
1241                 /* Add the same CAs to the client certificate requests */
1242                 SSL_CTX_set_client_CA_list(ssl_ctx,
1243                                            SSL_load_client_CA_file(ca_cert));
1244 #endif /* OPENSSL_NO_STDIO */
1245         }
1246
1247         return 0;
1248 }
1249
1250
1251 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1252 {
1253         int flags;
1254
1255         if (check_crl) {
1256                 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1257                 if (cs == NULL) {
1258                         tls_show_errors(MSG_INFO, __func__, "Failed to get "
1259                                         "certificate store when enabling "
1260                                         "check_crl");
1261                         return -1;
1262                 }
1263                 flags = X509_V_FLAG_CRL_CHECK;
1264                 if (check_crl == 2)
1265                         flags |= X509_V_FLAG_CRL_CHECK_ALL;
1266                 X509_STORE_set_flags(cs, flags);
1267         }
1268         return 0;
1269 }
1270
1271
1272 static int tls_connection_set_subject_match(struct tls_connection *conn,
1273                                             const char *subject_match,
1274                                             const char *altsubject_match)
1275 {
1276         os_free(conn->subject_match);
1277         conn->subject_match = NULL;
1278         if (subject_match) {
1279                 conn->subject_match = os_strdup(subject_match);
1280                 if (conn->subject_match == NULL)
1281                         return -1;
1282         }
1283
1284         os_free(conn->altsubject_match);
1285         conn->altsubject_match = NULL;
1286         if (altsubject_match) {
1287                 conn->altsubject_match = os_strdup(altsubject_match);
1288                 if (conn->altsubject_match == NULL)
1289                         return -1;
1290         }
1291
1292         return 0;
1293 }
1294
1295
1296 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1297                               int verify_peer)
1298 {
1299         static int counter = 0;
1300
1301         if (conn == NULL)
1302                 return -1;
1303
1304         if (verify_peer) {
1305                 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1306                                SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1307                                SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1308         } else {
1309                 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1310         }
1311
1312         SSL_set_accept_state(conn->ssl);
1313
1314         /*
1315          * Set session id context in order to avoid fatal errors when client
1316          * tries to resume a session. However, set the context to a unique
1317          * value in order to effectively disable session resumption for now
1318          * since not all areas of the server code are ready for it (e.g.,
1319          * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
1320          * handshake).
1321          */
1322         counter++;
1323         SSL_set_session_id_context(conn->ssl,
1324                                    (const unsigned char *) &counter,
1325                                    sizeof(counter));
1326
1327         return 0;
1328 }
1329
1330
1331 static int tls_connection_client_cert(struct tls_connection *conn,
1332                                       const char *client_cert,
1333                                       const u8 *client_cert_blob,
1334                                       size_t client_cert_blob_len)
1335 {
1336         if (client_cert == NULL && client_cert_blob == NULL)
1337                 return 0;
1338
1339         if (client_cert_blob &&
1340             SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1341                                      client_cert_blob_len) == 1) {
1342                 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1343                            "OK");
1344                 return 0;
1345         } else if (client_cert_blob) {
1346                 tls_show_errors(MSG_DEBUG, __func__,
1347                                 "SSL_use_certificate_ASN1 failed");
1348         }
1349
1350         if (client_cert == NULL)
1351                 return -1;
1352
1353 #ifndef OPENSSL_NO_STDIO
1354         if (SSL_use_certificate_file(conn->ssl, client_cert,
1355                                      SSL_FILETYPE_ASN1) == 1) {
1356                 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1357                            " --> OK");
1358                 return 0;
1359         } else {
1360                 tls_show_errors(MSG_DEBUG, __func__,
1361                                 "SSL_use_certificate_file (DER) failed");
1362         }
1363
1364         if (SSL_use_certificate_file(conn->ssl, client_cert,
1365                                      SSL_FILETYPE_PEM) == 1) {
1366                 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1367                            " --> OK");
1368                 return 0;
1369         } else {
1370                 tls_show_errors(MSG_DEBUG, __func__,
1371                                 "SSL_use_certificate_file (PEM) failed");
1372         }
1373 #else /* OPENSSL_NO_STDIO */
1374         wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1375 #endif /* OPENSSL_NO_STDIO */
1376
1377         return -1;
1378 }
1379
1380
1381 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1382 {
1383 #ifndef OPENSSL_NO_STDIO
1384         if (client_cert == NULL)
1385                 return 0;
1386
1387         if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1388                                          SSL_FILETYPE_ASN1) != 1 &&
1389             SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1390                                          SSL_FILETYPE_PEM) != 1) {
1391                 tls_show_errors(MSG_INFO, __func__,
1392                                 "Failed to load client certificate");
1393                 return -1;
1394         }
1395         return 0;
1396 #else /* OPENSSL_NO_STDIO */
1397         if (client_cert == NULL)
1398                 return 0;
1399         wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1400         return -1;
1401 #endif /* OPENSSL_NO_STDIO */
1402 }
1403
1404
1405 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1406 {
1407         if (password == NULL) {
1408                 return 0;
1409         }
1410         os_strlcpy(buf, (char *) password, size);
1411         return os_strlen(buf);
1412 }
1413
1414
1415 #ifdef PKCS12_FUNCS
1416 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1417                             const char *passwd)
1418 {
1419         EVP_PKEY *pkey;
1420         X509 *cert;
1421         STACK_OF(X509) *certs;
1422         int res = 0;
1423         char buf[256];
1424
1425         pkey = NULL;
1426         cert = NULL;
1427         certs = NULL;
1428         if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1429                 tls_show_errors(MSG_DEBUG, __func__,
1430                                 "Failed to parse PKCS12 file");
1431                 PKCS12_free(p12);
1432                 return -1;
1433         }
1434         wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1435
1436         if (cert) {
1437                 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1438                                   sizeof(buf));
1439                 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1440                            "subject='%s'", buf);
1441                 if (ssl) {
1442                         if (SSL_use_certificate(ssl, cert) != 1)
1443                                 res = -1;
1444                 } else {
1445                         if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1446                                 res = -1;
1447                 }
1448                 X509_free(cert);
1449         }
1450
1451         if (pkey) {
1452                 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1453                 if (ssl) {
1454                         if (SSL_use_PrivateKey(ssl, pkey) != 1)
1455                                 res = -1;
1456                 } else {
1457                         if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1458                                 res = -1;
1459                 }
1460                 EVP_PKEY_free(pkey);
1461         }
1462
1463         if (certs) {
1464                 while ((cert = sk_X509_pop(certs)) != NULL) {
1465                         X509_NAME_oneline(X509_get_subject_name(cert), buf,
1466                                           sizeof(buf));
1467                         wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1468                                    " from PKCS12: subject='%s'", buf);
1469                         /*
1470                          * There is no SSL equivalent for the chain cert - so
1471                          * always add it to the context...
1472                          */
1473                         if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1474                                 res = -1;
1475                                 break;
1476                         }
1477                 }
1478                 sk_X509_free(certs);
1479         }
1480
1481         PKCS12_free(p12);
1482
1483         if (res < 0)
1484                 tls_get_errors(ssl_ctx);
1485
1486         return res;
1487 }
1488 #endif  /* PKCS12_FUNCS */
1489
1490
1491 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1492                            const char *passwd)
1493 {
1494 #ifdef PKCS12_FUNCS
1495         FILE *f;
1496         PKCS12 *p12;
1497
1498         f = fopen(private_key, "rb");
1499         if (f == NULL)
1500                 return -1;
1501
1502         p12 = d2i_PKCS12_fp(f, NULL);
1503         fclose(f);
1504
1505         if (p12 == NULL) {
1506                 tls_show_errors(MSG_INFO, __func__,
1507                                 "Failed to use PKCS#12 file");
1508                 return -1;
1509         }
1510
1511         return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1512
1513 #else /* PKCS12_FUNCS */
1514         wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1515                    "p12/pfx files");
1516         return -1;
1517 #endif  /* PKCS12_FUNCS */
1518 }
1519
1520
1521 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1522                                 const u8 *blob, size_t len, const char *passwd)
1523 {
1524 #ifdef PKCS12_FUNCS
1525         PKCS12 *p12;
1526
1527         p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1528         if (p12 == NULL) {
1529                 tls_show_errors(MSG_INFO, __func__,
1530                                 "Failed to use PKCS#12 blob");
1531                 return -1;
1532         }
1533
1534         return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1535
1536 #else /* PKCS12_FUNCS */
1537         wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1538                    "p12/pfx blobs");
1539         return -1;
1540 #endif  /* PKCS12_FUNCS */
1541 }
1542
1543
1544 #ifndef OPENSSL_NO_ENGINE
1545 static int tls_engine_get_cert(struct tls_connection *conn,
1546                                const char *cert_id,
1547                                X509 **cert)
1548 {
1549         /* this runs after the private key is loaded so no PIN is required */
1550         struct {
1551                 const char *cert_id;
1552                 X509 *cert;
1553         } params;
1554         params.cert_id = cert_id;
1555         params.cert = NULL;
1556
1557         if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
1558                              0, &params, NULL, 1)) {
1559                 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
1560                            " '%s' [%s]", cert_id,
1561                            ERR_error_string(ERR_get_error(), NULL));
1562                 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1563         }
1564         if (!params.cert) {
1565                 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
1566                            " '%s'", cert_id);
1567                 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1568         }
1569         *cert = params.cert;
1570         return 0;
1571 }
1572 #endif /* OPENSSL_NO_ENGINE */
1573
1574
1575 static int tls_connection_engine_client_cert(struct tls_connection *conn,
1576                                              const char *cert_id)
1577 {
1578 #ifndef OPENSSL_NO_ENGINE
1579         X509 *cert;
1580
1581         if (tls_engine_get_cert(conn, cert_id, &cert))
1582                 return -1;
1583
1584         if (!SSL_use_certificate(conn->ssl, cert)) {
1585                 tls_show_errors(MSG_ERROR, __func__,
1586                                 "SSL_use_certificate failed");
1587                 X509_free(cert);
1588                 return -1;
1589         }
1590         X509_free(cert);
1591         wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
1592                    "OK");
1593         return 0;
1594
1595 #else /* OPENSSL_NO_ENGINE */
1596         return -1;
1597 #endif /* OPENSSL_NO_ENGINE */
1598 }
1599
1600
1601 static int tls_connection_engine_ca_cert(void *_ssl_ctx,
1602                                          struct tls_connection *conn,
1603                                          const char *ca_cert_id)
1604 {
1605 #ifndef OPENSSL_NO_ENGINE
1606         X509 *cert;
1607         SSL_CTX *ssl_ctx = _ssl_ctx;
1608
1609         if (tls_engine_get_cert(conn, ca_cert_id, &cert))
1610                 return -1;
1611
1612         /* start off the same as tls_connection_ca_cert */
1613         X509_STORE_free(ssl_ctx->cert_store);
1614         ssl_ctx->cert_store = X509_STORE_new();
1615         if (ssl_ctx->cert_store == NULL) {
1616                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1617                            "certificate store", __func__);
1618                 X509_free(cert);
1619                 return -1;
1620         }
1621         if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1622                 unsigned long err = ERR_peek_error();
1623                 tls_show_errors(MSG_WARNING, __func__,
1624                                 "Failed to add CA certificate from engine "
1625                                 "to certificate store");
1626                 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1627                     ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1628                         wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
1629                                    " already in hash table error",
1630                                    __func__);
1631                 } else {
1632                         X509_free(cert);
1633                         return -1;
1634                 }
1635         }
1636         X509_free(cert);
1637         wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
1638                    "to certificate store", __func__);
1639         SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1640         return 0;
1641
1642 #else /* OPENSSL_NO_ENGINE */
1643         return -1;
1644 #endif /* OPENSSL_NO_ENGINE */
1645 }
1646
1647
1648 static int tls_connection_engine_private_key(struct tls_connection *conn)
1649 {
1650 #ifndef OPENSSL_NO_ENGINE
1651         if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1652                 tls_show_errors(MSG_ERROR, __func__,
1653                                 "ENGINE: cannot use private key for TLS");
1654                 return -1;
1655         }
1656         if (!SSL_check_private_key(conn->ssl)) {
1657                 tls_show_errors(MSG_INFO, __func__,
1658                                 "Private key failed verification");
1659                 return -1;
1660         }
1661         return 0;
1662 #else /* OPENSSL_NO_ENGINE */
1663         wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1664                    "engine support was not compiled in");
1665         return -1;
1666 #endif /* OPENSSL_NO_ENGINE */
1667 }
1668
1669
1670 static int tls_connection_private_key(void *_ssl_ctx,
1671                                       struct tls_connection *conn,
1672                                       const char *private_key,
1673                                       const char *private_key_passwd,
1674                                       const u8 *private_key_blob,
1675                                       size_t private_key_blob_len)
1676 {
1677         SSL_CTX *ssl_ctx = _ssl_ctx;
1678         char *passwd;
1679         int ok;
1680
1681         if (private_key == NULL && private_key_blob == NULL)
1682                 return 0;
1683
1684         if (private_key_passwd) {
1685                 passwd = os_strdup(private_key_passwd);
1686                 if (passwd == NULL)
1687                         return -1;
1688         } else
1689                 passwd = NULL;
1690
1691         SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1692         SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1693
1694         ok = 0;
1695         while (private_key_blob) {
1696                 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1697                                             (u8 *) private_key_blob,
1698                                             private_key_blob_len) == 1) {
1699                         wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1700                                    "ASN1(EVP_PKEY_RSA) --> OK");
1701                         ok = 1;
1702                         break;
1703                 } else {
1704                         tls_show_errors(MSG_DEBUG, __func__,
1705                                         "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1706                                         " failed");
1707                 }
1708
1709                 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1710                                             (u8 *) private_key_blob,
1711                                             private_key_blob_len) == 1) {
1712                         wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1713                                    "ASN1(EVP_PKEY_DSA) --> OK");
1714                         ok = 1;
1715                         break;
1716                 } else {
1717                         tls_show_errors(MSG_DEBUG, __func__,
1718                                         "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1719                                         " failed");
1720                 }
1721
1722                 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1723                                                (u8 *) private_key_blob,
1724                                                private_key_blob_len) == 1) {
1725                         wpa_printf(MSG_DEBUG, "OpenSSL: "
1726                                    "SSL_use_RSAPrivateKey_ASN1 --> OK");
1727                         ok = 1;
1728                         break;
1729                 } else {
1730                         tls_show_errors(MSG_DEBUG, __func__,
1731                                         "SSL_use_RSAPrivateKey_ASN1 failed");
1732                 }
1733
1734                 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1735                                          private_key_blob_len, passwd) == 0) {
1736                         wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1737                                    "OK");
1738                         ok = 1;
1739                         break;
1740                 }
1741
1742                 break;
1743         }
1744
1745         while (!ok && private_key) {
1746 #ifndef OPENSSL_NO_STDIO
1747                 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1748                                             SSL_FILETYPE_ASN1) == 1) {
1749                         wpa_printf(MSG_DEBUG, "OpenSSL: "
1750                                    "SSL_use_PrivateKey_File (DER) --> OK");
1751                         ok = 1;
1752                         break;
1753                 } else {
1754                         tls_show_errors(MSG_DEBUG, __func__,
1755                                         "SSL_use_PrivateKey_File (DER) "
1756                                         "failed");
1757                 }
1758
1759                 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1760                                             SSL_FILETYPE_PEM) == 1) {
1761                         wpa_printf(MSG_DEBUG, "OpenSSL: "
1762                                    "SSL_use_PrivateKey_File (PEM) --> OK");
1763                         ok = 1;
1764                         break;
1765                 } else {
1766                         tls_show_errors(MSG_DEBUG, __func__,
1767                                         "SSL_use_PrivateKey_File (PEM) "
1768                                         "failed");
1769                 }
1770 #else /* OPENSSL_NO_STDIO */
1771                 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1772                            __func__);
1773 #endif /* OPENSSL_NO_STDIO */
1774
1775                 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1776                     == 0) {
1777                         wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1778                                    "--> OK");
1779                         ok = 1;
1780                         break;
1781                 }
1782
1783                 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1784                         wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1785                                    "access certificate store --> OK");
1786                         ok = 1;
1787                         break;
1788                 }
1789
1790                 break;
1791         }
1792
1793         if (!ok) {
1794                 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1795                 os_free(passwd);
1796                 ERR_clear_error();
1797                 return -1;
1798         }
1799         ERR_clear_error();
1800         SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1801         os_free(passwd);
1802
1803         if (!SSL_check_private_key(conn->ssl)) {
1804                 tls_show_errors(MSG_INFO, __func__, "Private key failed "
1805                                 "verification");
1806                 return -1;
1807         }
1808
1809         wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1810         return 0;
1811 }
1812
1813
1814 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1815                                   const char *private_key_passwd)
1816 {
1817         char *passwd;
1818
1819         if (private_key == NULL)
1820                 return 0;
1821
1822         if (private_key_passwd) {
1823                 passwd = os_strdup(private_key_passwd);
1824                 if (passwd == NULL)
1825                         return -1;
1826         } else
1827                 passwd = NULL;
1828
1829         SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1830         SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1831         if (
1832 #ifndef OPENSSL_NO_STDIO
1833             SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1834                                         SSL_FILETYPE_ASN1) != 1 &&
1835             SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1836                                         SSL_FILETYPE_PEM) != 1 &&
1837 #endif /* OPENSSL_NO_STDIO */
1838             tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1839                 tls_show_errors(MSG_INFO, __func__,
1840                                 "Failed to load private key");
1841                 os_free(passwd);
1842                 ERR_clear_error();
1843                 return -1;
1844         }
1845         os_free(passwd);
1846         ERR_clear_error();
1847         SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1848
1849         if (!SSL_CTX_check_private_key(ssl_ctx)) {
1850                 tls_show_errors(MSG_INFO, __func__,
1851                                 "Private key failed verification");
1852                 return -1;
1853         }
1854
1855         return 0;
1856 }
1857
1858
1859 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1860 {
1861 #ifdef OPENSSL_NO_DH
1862         if (dh_file == NULL)
1863                 return 0;
1864         wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1865                    "dh_file specified");
1866         return -1;
1867 #else /* OPENSSL_NO_DH */
1868         DH *dh;
1869         BIO *bio;
1870
1871         /* TODO: add support for dh_blob */
1872         if (dh_file == NULL)
1873                 return 0;
1874         if (conn == NULL)
1875                 return -1;
1876
1877         bio = BIO_new_file(dh_file, "r");
1878         if (bio == NULL) {
1879                 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1880                            dh_file, ERR_error_string(ERR_get_error(), NULL));
1881                 return -1;
1882         }
1883         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1884         BIO_free(bio);
1885 #ifndef OPENSSL_NO_DSA
1886         while (dh == NULL) {
1887                 DSA *dsa;
1888                 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1889                            " trying to parse as DSA params", dh_file,
1890                            ERR_error_string(ERR_get_error(), NULL));
1891                 bio = BIO_new_file(dh_file, "r");
1892                 if (bio == NULL)
1893                         break;
1894                 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1895                 BIO_free(bio);
1896                 if (!dsa) {
1897                         wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1898                                    "'%s': %s", dh_file,
1899                                    ERR_error_string(ERR_get_error(), NULL));
1900                         break;
1901                 }
1902
1903                 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1904                 dh = DSA_dup_DH(dsa);
1905                 DSA_free(dsa);
1906                 if (dh == NULL) {
1907                         wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1908                                    "params into DH params");
1909                         break;
1910                 }
1911                 break;
1912         }
1913 #endif /* !OPENSSL_NO_DSA */
1914         if (dh == NULL) {
1915                 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1916                            "'%s'", dh_file);
1917                 return -1;
1918         }
1919
1920         if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1921                 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1922                            "%s", dh_file,
1923                            ERR_error_string(ERR_get_error(), NULL));
1924                 DH_free(dh);
1925                 return -1;
1926         }
1927         DH_free(dh);
1928         return 0;
1929 #endif /* OPENSSL_NO_DH */
1930 }
1931
1932
1933 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
1934 {
1935 #ifdef OPENSSL_NO_DH
1936         if (dh_file == NULL)
1937                 return 0;
1938         wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1939                    "dh_file specified");
1940         return -1;
1941 #else /* OPENSSL_NO_DH */
1942         DH *dh;
1943         BIO *bio;
1944
1945         /* TODO: add support for dh_blob */
1946         if (dh_file == NULL)
1947                 return 0;
1948         if (ssl_ctx == NULL)
1949                 return -1;
1950
1951         bio = BIO_new_file(dh_file, "r");
1952         if (bio == NULL) {
1953                 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1954                            dh_file, ERR_error_string(ERR_get_error(), NULL));
1955                 return -1;
1956         }
1957         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1958         BIO_free(bio);
1959 #ifndef OPENSSL_NO_DSA
1960         while (dh == NULL) {
1961                 DSA *dsa;
1962                 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1963                            " trying to parse as DSA params", dh_file,
1964                            ERR_error_string(ERR_get_error(), NULL));
1965                 bio = BIO_new_file(dh_file, "r");
1966                 if (bio == NULL)
1967                         break;
1968                 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1969                 BIO_free(bio);
1970                 if (!dsa) {
1971                         wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1972                                    "'%s': %s", dh_file,
1973                                    ERR_error_string(ERR_get_error(), NULL));
1974                         break;
1975                 }
1976
1977                 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1978                 dh = DSA_dup_DH(dsa);
1979                 DSA_free(dsa);
1980                 if (dh == NULL) {
1981                         wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1982                                    "params into DH params");
1983                         break;
1984                 }
1985                 break;
1986         }
1987 #endif /* !OPENSSL_NO_DSA */
1988         if (dh == NULL) {
1989                 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1990                            "'%s'", dh_file);
1991                 return -1;
1992         }
1993
1994         if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
1995                 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1996                            "%s", dh_file,
1997                            ERR_error_string(ERR_get_error(), NULL));
1998                 DH_free(dh);
1999                 return -1;
2000         }
2001         DH_free(dh);
2002         return 0;
2003 #endif /* OPENSSL_NO_DH */
2004 }
2005
2006
2007 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
2008                             struct tls_keys *keys)
2009 {
2010         SSL *ssl;
2011
2012         if (conn == NULL || keys == NULL)
2013                 return -1;
2014         ssl = conn->ssl;
2015         if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2016                 return -1;
2017
2018         os_memset(keys, 0, sizeof(*keys));
2019         keys->master_key = ssl->session->master_key;
2020         keys->master_key_len = ssl->session->master_key_length;
2021         keys->client_random = ssl->s3->client_random;
2022         keys->client_random_len = SSL3_RANDOM_SIZE;
2023         keys->server_random = ssl->s3->server_random;
2024         keys->server_random_len = SSL3_RANDOM_SIZE;
2025
2026         return 0;
2027 }
2028
2029
2030 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
2031                        const char *label, int server_random_first,
2032                        u8 *out, size_t out_len)
2033 {
2034         return -1;
2035 }
2036
2037
2038 u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
2039                               const u8 *in_data, size_t in_len,
2040                               size_t *out_len, u8 **appl_data,
2041                               size_t *appl_data_len)
2042 {
2043         int res;
2044         u8 *out_data;
2045
2046         if (appl_data)
2047                 *appl_data = NULL;
2048
2049         /*
2050          * Give TLS handshake data from the server (if available) to OpenSSL
2051          * for processing.
2052          */
2053         if (in_data &&
2054             BIO_write(conn->ssl_in, in_data, in_len) < 0) {
2055                 tls_show_errors(MSG_INFO, __func__,
2056                                 "Handshake failed - BIO_write");
2057                 return NULL;
2058         }
2059
2060         /* Initiate TLS handshake or continue the existing handshake */
2061         res = SSL_connect(conn->ssl);
2062         if (res != 1) {
2063                 int err = SSL_get_error(conn->ssl, res);
2064                 if (err == SSL_ERROR_WANT_READ)
2065                         wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
2066                                    "more data");
2067                 else if (err == SSL_ERROR_WANT_WRITE)
2068                         wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
2069                                    "write");
2070                 else {
2071                         tls_show_errors(MSG_INFO, __func__, "SSL_connect");
2072                         conn->failed++;
2073                 }
2074         }
2075
2076         /* Get the TLS handshake data to be sent to the server */
2077         res = BIO_ctrl_pending(conn->ssl_out);
2078         wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2079         out_data = os_malloc(res == 0 ? 1 : res);
2080         if (out_data == NULL) {
2081                 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2082                            "handshake output (%d bytes)", res);
2083                 if (BIO_reset(conn->ssl_out) < 0) {
2084                         tls_show_errors(MSG_INFO, __func__,
2085                                         "BIO_reset failed");
2086                 }
2087                 *out_len = 0;
2088                 return NULL;
2089         }
2090         res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
2091         if (res < 0) {
2092                 tls_show_errors(MSG_INFO, __func__,
2093                                 "Handshake failed - BIO_read");
2094                 if (BIO_reset(conn->ssl_out) < 0) {
2095                         tls_show_errors(MSG_INFO, __func__,
2096                                         "BIO_reset failed");
2097                 }
2098                 *out_len = 0;
2099                 return NULL;
2100         }
2101         *out_len = res;
2102
2103         if (SSL_is_init_finished(conn->ssl) && appl_data) {
2104                 *appl_data = os_malloc(in_len);
2105                 if (*appl_data) {
2106                         res = SSL_read(conn->ssl, *appl_data, in_len);
2107                         if (res < 0) {
2108                                 tls_show_errors(MSG_INFO, __func__,
2109                                                 "Failed to read possible "
2110                                                 "Application Data");
2111                                 os_free(*appl_data);
2112                                 *appl_data = NULL;
2113                         } else {
2114                                 *appl_data_len = res;
2115                                 wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
2116                                                 " Data in Finish message",
2117                                                 *appl_data, *appl_data_len);
2118                         }
2119                 }
2120         }
2121
2122         return out_data;
2123 }
2124
2125
2126 u8 * tls_connection_server_handshake(void *ssl_ctx,
2127                                      struct tls_connection *conn,
2128                                      const u8 *in_data, size_t in_len,
2129                                      size_t *out_len)
2130 {
2131         int res;
2132         u8 *out_data;
2133
2134         /*
2135          * Give TLS handshake data from the client (if available) to OpenSSL
2136          * for processing.
2137          */
2138         if (in_data &&
2139             BIO_write(conn->ssl_in, in_data, in_len) < 0) {
2140                 tls_show_errors(MSG_INFO, __func__,
2141                                 "Handshake failed - BIO_write");
2142                 return NULL;
2143         }
2144
2145         /* Initiate TLS handshake or continue the existing handshake */
2146         res = SSL_accept(conn->ssl);
2147         if (res != 1) {
2148                 int err = SSL_get_error(conn->ssl, res);
2149                 if (err == SSL_ERROR_WANT_READ)
2150                         wpa_printf(MSG_DEBUG, "SSL: SSL_accept - want "
2151                                    "more data");
2152                 else if (err == SSL_ERROR_WANT_WRITE)
2153                         wpa_printf(MSG_DEBUG, "SSL: SSL_accept - want to "
2154                                    "write");
2155                 else {
2156                         tls_show_errors(MSG_INFO, __func__, "SSL_accept");
2157                         return NULL;
2158                 }
2159         }
2160
2161         /* Get the TLS handshake data to be sent to the client */
2162         res = BIO_ctrl_pending(conn->ssl_out);
2163         wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2164         out_data = os_malloc(res == 0 ? 1 : res);
2165         if (out_data == NULL) {
2166                 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2167                            "handshake output (%d bytes)", res);
2168                 if (BIO_reset(conn->ssl_out) < 0) {
2169                         tls_show_errors(MSG_INFO, __func__,
2170                                         "BIO_reset failed");
2171                 }
2172                 *out_len = 0;
2173                 return NULL;
2174         }
2175         res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
2176         if (res < 0) {
2177                 tls_show_errors(MSG_INFO, __func__,
2178                                 "Handshake failed - BIO_read");
2179                 if (BIO_reset(conn->ssl_out) < 0) {
2180                         tls_show_errors(MSG_INFO, __func__,
2181                                         "BIO_reset failed");
2182                 }
2183                 *out_len = 0;
2184                 return NULL;
2185         }
2186         *out_len = res;
2187         return out_data;
2188 }
2189
2190
2191 int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
2192                            const u8 *in_data, size_t in_len,
2193                            u8 *out_data, size_t out_len)
2194 {
2195         int res;
2196
2197         if (conn == NULL)
2198                 return -1;
2199
2200         /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2201         if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2202             (res = BIO_reset(conn->ssl_out)) < 0) {
2203                 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2204                 return res;
2205         }
2206         res = SSL_write(conn->ssl, in_data, in_len);
2207         if (res < 0) {
2208                 tls_show_errors(MSG_INFO, __func__,
2209                                 "Encryption failed - SSL_write");
2210                 return res;
2211         }
2212
2213         /* Read encrypted data to be sent to the server */
2214         res = BIO_read(conn->ssl_out, out_data, out_len);
2215         if (res < 0) {
2216                 tls_show_errors(MSG_INFO, __func__,
2217                                 "Encryption failed - BIO_read");
2218                 return res;
2219         }
2220
2221         return res;
2222 }
2223
2224
2225 int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
2226                            const u8 *in_data, size_t in_len,
2227                            u8 *out_data, size_t out_len)
2228 {
2229         int res;
2230
2231         /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
2232         res = BIO_write(conn->ssl_in, in_data, in_len);
2233         if (res < 0) {
2234                 tls_show_errors(MSG_INFO, __func__,
2235                                 "Decryption failed - BIO_write");
2236                 return res;
2237         }
2238         if (BIO_reset(conn->ssl_out) < 0) {
2239                 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2240                 return res;
2241         }
2242
2243         /* Read decrypted data for further processing */
2244         res = SSL_read(conn->ssl, out_data, out_len);
2245         if (res < 0) {
2246                 tls_show_errors(MSG_INFO, __func__,
2247                                 "Decryption failed - SSL_read");
2248                 return res;
2249         }
2250
2251         return res;
2252 }
2253
2254
2255 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2256 {
2257         return conn ? conn->ssl->hit : 0;
2258 }
2259
2260
2261 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2262                                    u8 *ciphers)
2263 {
2264         char buf[100], *pos, *end;
2265         u8 *c;
2266         int ret;
2267
2268         if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2269                 return -1;
2270
2271         buf[0] = '\0';
2272         pos = buf;
2273         end = pos + sizeof(buf);
2274
2275         c = ciphers;
2276         while (*c != TLS_CIPHER_NONE) {
2277                 const char *suite;
2278
2279                 switch (*c) {
2280                 case TLS_CIPHER_RC4_SHA:
2281                         suite = "RC4-SHA";
2282                         break;
2283                 case TLS_CIPHER_AES128_SHA:
2284                         suite = "AES128-SHA";
2285                         break;
2286                 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2287                         suite = "DHE-RSA-AES128-SHA";
2288                         break;
2289                 case TLS_CIPHER_ANON_DH_AES128_SHA:
2290                         suite = "ADH-AES128-SHA";
2291                         break;
2292                 default:
2293                         wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2294                                    "cipher selection: %d", *c);
2295                         return -1;
2296                 }
2297                 ret = os_snprintf(pos, end - pos, ":%s", suite);
2298                 if (ret < 0 || ret >= end - pos)
2299                         break;
2300                 pos += ret;
2301
2302                 c++;
2303         }
2304
2305         wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2306
2307         if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2308                 tls_show_errors(MSG_INFO, __func__,
2309                                 "Cipher suite configuration failed");
2310                 return -1;
2311         }
2312
2313         return 0;
2314 }
2315
2316
2317 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2318                    char *buf, size_t buflen)
2319 {
2320         const char *name;
2321         if (conn == NULL || conn->ssl == NULL)
2322                 return -1;
2323
2324         name = SSL_get_cipher(conn->ssl);
2325         if (name == NULL)
2326                 return -1;
2327
2328         os_strlcpy(buf, name, buflen);
2329         return 0;
2330 }
2331
2332
2333 int tls_connection_enable_workaround(void *ssl_ctx,
2334                                      struct tls_connection *conn)
2335 {
2336         SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2337
2338         return 0;
2339 }
2340
2341
2342 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2343 /* ClientHello TLS extensions require a patch to openssl, so this function is
2344  * commented out unless explicitly needed for EAP-FAST in order to be able to
2345  * build this file with unmodified openssl. */
2346 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2347                                     int ext_type, const u8 *data,
2348                                     size_t data_len)
2349 {
2350         if (conn == NULL || conn->ssl == NULL || ext_type != 35)
2351                 return -1;
2352
2353 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2354         if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
2355                                        data_len) != 1)
2356                 return -1;
2357 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2358         if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2359                                     data_len) != 1)
2360                 return -1;
2361 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2362
2363         return 0;
2364 }
2365 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2366
2367
2368 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2369 {
2370         if (conn == NULL)
2371                 return -1;
2372         return conn->failed;
2373 }
2374
2375
2376 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2377 {
2378         if (conn == NULL)
2379                 return -1;
2380         return conn->read_alerts;
2381 }
2382
2383
2384 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2385 {
2386         if (conn == NULL)
2387                 return -1;
2388         return conn->write_alerts;
2389 }
2390
2391
2392 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2393                               const struct tls_connection_params *params)
2394 {
2395         int ret;
2396         unsigned long err;
2397
2398         if (conn == NULL)
2399                 return -1;
2400
2401         while ((err = ERR_get_error())) {
2402                 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2403                            __func__, ERR_error_string(err, NULL));
2404         }
2405
2406         if (params->engine) {
2407                 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2408                 ret = tls_engine_init(conn, params->engine_id, params->pin,
2409                                       params->key_id, params->cert_id,
2410                                       params->ca_cert_id);
2411                 if (ret)
2412                         return ret;
2413         }
2414         if (tls_connection_set_subject_match(conn,
2415                                              params->subject_match,
2416                                              params->altsubject_match))
2417                 return -1;
2418
2419         if (params->engine && params->ca_cert_id) {
2420                 if (tls_connection_engine_ca_cert(tls_ctx, conn,
2421                                                   params->ca_cert_id))
2422                         return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2423         } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2424                                           params->ca_cert_blob,
2425                                           params->ca_cert_blob_len,
2426                                           params->ca_path))
2427                 return -1;
2428
2429         if (params->engine && params->cert_id) {
2430                 if (tls_connection_engine_client_cert(conn, params->cert_id))
2431                         return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2432         } else if (tls_connection_client_cert(conn, params->client_cert,
2433                                               params->client_cert_blob,
2434                                               params->client_cert_blob_len))
2435                 return -1;
2436
2437         if (params->engine && params->key_id) {
2438                 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
2439                 if (tls_connection_engine_private_key(conn))
2440                         return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2441         } else if (tls_connection_private_key(tls_ctx, conn,
2442                                               params->private_key,
2443                                               params->private_key_passwd,
2444                                               params->private_key_blob,
2445                                               params->private_key_blob_len)) {
2446                 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2447                            params->private_key);
2448                 return -1;
2449         }
2450
2451         if (tls_connection_dh(conn, params->dh_file)) {
2452                 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2453                            params->dh_file);
2454                 return -1;
2455         }
2456
2457         tls_get_errors(tls_ctx);
2458
2459         return 0;
2460 }
2461
2462
2463 int tls_global_set_params(void *tls_ctx,
2464                           const struct tls_connection_params *params)
2465 {
2466         SSL_CTX *ssl_ctx = tls_ctx;
2467         unsigned long err;
2468
2469         while ((err = ERR_get_error())) {
2470                 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2471                            __func__, ERR_error_string(err, NULL));
2472         }
2473
2474         if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2475                 return -1;
2476
2477         if (tls_global_client_cert(ssl_ctx, params->client_cert))
2478                 return -1;
2479
2480         if (tls_global_private_key(ssl_ctx, params->private_key,
2481                                    params->private_key_passwd))
2482                 return -1;
2483
2484         if (tls_global_dh(ssl_ctx, params->dh_file)) {
2485                 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2486                            params->dh_file);
2487                 return -1;
2488         }
2489
2490         return 0;
2491 }
2492
2493
2494 int tls_connection_get_keyblock_size(void *tls_ctx,
2495                                      struct tls_connection *conn)
2496 {
2497         const EVP_CIPHER *c;
2498         const EVP_MD *h;
2499
2500         if (conn == NULL || conn->ssl == NULL ||
2501             conn->ssl->enc_read_ctx == NULL ||
2502             conn->ssl->enc_read_ctx->cipher == NULL ||
2503             conn->ssl->read_hash == NULL)
2504                 return -1;
2505
2506         c = conn->ssl->enc_read_ctx->cipher;
2507 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
2508         h = EVP_MD_CTX_md(conn->ssl->read_hash);
2509 #else
2510         h = conn->ssl->read_hash;
2511 #endif
2512
2513         return 2 * (EVP_CIPHER_key_length(c) +
2514                     EVP_MD_size(h) +
2515                     EVP_CIPHER_iv_length(c));
2516 }
2517
2518
2519 unsigned int tls_capabilities(void *tls_ctx)
2520 {
2521         return 0;
2522 }
2523
2524
2525 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2526                           int tls_ia)
2527 {
2528         return -1;
2529 }
2530
2531
2532 int tls_connection_ia_send_phase_finished(void *tls_ctx,
2533                                           struct tls_connection *conn,
2534                                           int final,
2535                                           u8 *out_data, size_t out_len)
2536 {
2537         return -1;
2538 }
2539
2540
2541 int tls_connection_ia_final_phase_finished(void *tls_ctx,
2542                                            struct tls_connection *conn)
2543 {
2544         return -1;
2545 }
2546
2547
2548 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2549                                            struct tls_connection *conn,
2550                                            const u8 *key, size_t key_len)
2551 {
2552         return -1;
2553 }
2554
2555
2556 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2557 /* Pre-shared secred requires a patch to openssl, so this function is
2558  * commented out unless explicitly needed for EAP-FAST in order to be able to
2559  * build this file with unmodified openssl. */
2560
2561 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2562                            STACK_OF(SSL_CIPHER) *peer_ciphers,
2563                            SSL_CIPHER **cipher, void *arg)
2564 {
2565         struct tls_connection *conn = arg;
2566         int ret;
2567
2568         if (conn == NULL || conn->session_ticket_cb == NULL)
2569                 return 0;
2570
2571         ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
2572                                       conn->session_ticket,
2573                                       conn->session_ticket_len,
2574                                       s->s3->client_random,
2575                                       s->s3->server_random, secret);
2576         os_free(conn->session_ticket);
2577         conn->session_ticket = NULL;
2578
2579         if (ret <= 0)
2580                 return 0;
2581
2582         *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
2583         return 1;
2584 }
2585
2586
2587 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2588 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
2589                                      int len, void *arg)
2590 {
2591         struct tls_connection *conn = arg;
2592
2593         if (conn == NULL || conn->session_ticket_cb == NULL)
2594                 return 0;
2595
2596         wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
2597
2598         os_free(conn->session_ticket);
2599         conn->session_ticket = NULL;
2600
2601         wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2602                     "extension", data, len);
2603
2604         conn->session_ticket = os_malloc(len);
2605         if (conn->session_ticket == NULL)
2606                 return 0;
2607
2608         os_memcpy(conn->session_ticket, data, len);
2609         conn->session_ticket_len = len;
2610
2611         return 1;
2612 }
2613 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2614 #ifdef SSL_OP_NO_TICKET
2615 static void tls_hello_ext_cb(SSL *s, int client_server, int type,
2616                              unsigned char *data, int len, void *arg)
2617 {
2618         struct tls_connection *conn = arg;
2619
2620         if (conn == NULL || conn->session_ticket_cb == NULL)
2621                 return;
2622
2623         wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2624                    type, len);
2625
2626         if (type == TLSEXT_TYPE_session_ticket && !client_server) {
2627                 os_free(conn->session_ticket);
2628                 conn->session_ticket = NULL;
2629
2630                 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2631                             "extension", data, len);
2632                 conn->session_ticket = os_malloc(len);
2633                 if (conn->session_ticket == NULL)
2634                         return;
2635
2636                 os_memcpy(conn->session_ticket, data, len);
2637                 conn->session_ticket_len = len;
2638         }
2639 }
2640 #else /* SSL_OP_NO_TICKET */
2641 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
2642 {
2643         struct tls_connection *conn = arg;
2644
2645         if (conn == NULL || conn->session_ticket_cb == NULL)
2646                 return 0;
2647
2648         wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2649                    ext->type, ext->length);
2650
2651         os_free(conn->session_ticket);
2652         conn->session_ticket = NULL;
2653
2654         if (ext->type == 35) {
2655                 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2656                             "extension", ext->data, ext->length);
2657                 conn->session_ticket = os_malloc(ext->length);
2658                 if (conn->session_ticket == NULL)
2659                         return SSL_AD_INTERNAL_ERROR;
2660
2661                 os_memcpy(conn->session_ticket, ext->data, ext->length);
2662                 conn->session_ticket_len = ext->length;
2663         }
2664
2665         return 0;
2666 }
2667 #endif /* SSL_OP_NO_TICKET */
2668 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2669 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2670
2671
2672 int tls_connection_set_session_ticket_cb(void *tls_ctx,
2673                                          struct tls_connection *conn,
2674                                          tls_session_ticket_cb cb,
2675                                          void *ctx)
2676 {
2677 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2678         conn->session_ticket_cb = cb;
2679         conn->session_ticket_cb_ctx = ctx;
2680
2681         if (cb) {
2682                 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2683                                               conn) != 1)
2684                         return -1;
2685 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2686                 SSL_set_session_ticket_ext_cb(conn->ssl,
2687                                               tls_session_ticket_ext_cb, conn);
2688 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2689 #ifdef SSL_OP_NO_TICKET
2690                 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
2691                 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2692 #else /* SSL_OP_NO_TICKET */
2693                 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
2694                                                conn) != 1)
2695                         return -1;
2696 #endif /* SSL_OP_NO_TICKET */
2697 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2698         } else {
2699                 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2700                         return -1;
2701 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2702                 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
2703 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2704 #ifdef SSL_OP_NO_TICKET
2705                 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
2706                 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2707 #else /* SSL_OP_NO_TICKET */
2708                 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
2709                         return -1;
2710 #endif /* SSL_OP_NO_TICKET */
2711 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2712         }
2713
2714         return 0;
2715 #else /* EAP_FAST || EAP_FAST_DYNAMIC */
2716         return -1;
2717 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2718 }