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