src/tls/tlsv1_client.c

   1 /*
   2  * TLSv1 client (RFC 2246)
   3  * Copyright (c) 2006-2007, 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 #include "common.h"
  18 #include "crypto/sha1.h"
  19 #include "crypto/tls.h"
  20 #include "tlsv1_common.h"
  21 #include "tlsv1_record.h"
  22 #include "tlsv1_client.h"
  23 #include "tlsv1_client_i.h"
  24
  25 /* TODO:
  26  * Support for a message fragmented across several records (RFC 2246, 6.2.1)
  27  */
  28
  29
  30 void tls_alert(struct tlsv1_client *conn, u8 level, u8 description)
  31 {
  32         conn->alert_level = level;
  33         conn->alert_description = description;
  34 }
  35
  36
  37 void tlsv1_client_free_dh(struct tlsv1_client *conn)
  38 {
  39         os_free(conn->dh_p);
  40         os_free(conn->dh_g);
  41         os_free(conn->dh_ys);
  42         conn->dh_p = conn->dh_g = conn->dh_ys = NULL;
  43 }
  44
  45
  46 int tls_derive_pre_master_secret(u8 *pre_master_secret)
  47 {
  48         WPA_PUT_BE16(pre_master_secret, TLS_VERSION);
  49         if (os_get_random(pre_master_secret + 2,
  50                           TLS_PRE_MASTER_SECRET_LEN - 2))
  51                 return -1;
  52         return 0;
  53 }
  54
  55
  56 int tls_derive_keys(struct tlsv1_client *conn,
  57                     const u8 *pre_master_secret, size_t pre_master_secret_len)
  58 {
  59         u8 seed[2 * TLS_RANDOM_LEN];
  60         u8 key_block[TLS_MAX_KEY_BLOCK_LEN];
  61         u8 *pos;
  62         size_t key_block_len;
  63
  64         if (pre_master_secret) {
  65                 wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: pre_master_secret",
  66                                 pre_master_secret, pre_master_secret_len);
  67                 os_memcpy(seed, conn->client_random, TLS_RANDOM_LEN);
  68                 os_memcpy(seed + TLS_RANDOM_LEN, conn->server_random,
  69                           TLS_RANDOM_LEN);
  70                 if (tls_prf(pre_master_secret, pre_master_secret_len,
  71                             "master secret", seed, 2 * TLS_RANDOM_LEN,
  72                             conn->master_secret, TLS_MASTER_SECRET_LEN)) {
  73                         wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive "
  74                                    "master_secret");
  75                         return -1;
  76                 }
  77                 wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: master_secret",
  78                                 conn->master_secret, TLS_MASTER_SECRET_LEN);
  79         }
  80
  81         os_memcpy(seed, conn->server_random, TLS_RANDOM_LEN);
  82         os_memcpy(seed + TLS_RANDOM_LEN, conn->client_random, TLS_RANDOM_LEN);
  83         key_block_len = 2 * (conn->rl.hash_size + conn->rl.key_material_len +
  84                              conn->rl.iv_size);
  85         if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
  86                     "key expansion", seed, 2 * TLS_RANDOM_LEN,
  87                     key_block, key_block_len)) {
  88                 wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive key_block");
  89                 return -1;
  90         }
  91         wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: key_block",
  92                         key_block, key_block_len);
  93
  94         pos = key_block;
  95
  96         /* client_write_MAC_secret */
  97         os_memcpy(conn->rl.write_mac_secret, pos, conn->rl.hash_size);
  98         pos += conn->rl.hash_size;
  99         /* server_write_MAC_secret */
 100         os_memcpy(conn->rl.read_mac_secret, pos, conn->rl.hash_size);
 101         pos += conn->rl.hash_size;
 102
 103         /* client_write_key */
 104         os_memcpy(conn->rl.write_key, pos, conn->rl.key_material_len);
 105         pos += conn->rl.key_material_len;
 106         /* server_write_key */
 107         os_memcpy(conn->rl.read_key, pos, conn->rl.key_material_len);
 108         pos += conn->rl.key_material_len;
 109
 110         /* client_write_IV */
 111         os_memcpy(conn->rl.write_iv, pos, conn->rl.iv_size);
 112         pos += conn->rl.iv_size;
 113         /* server_write_IV */
 114         os_memcpy(conn->rl.read_iv, pos, conn->rl.iv_size);
 115         pos += conn->rl.iv_size;
 116
 117         return 0;
 118 }
 119
 120
 121 /**
 122  * tlsv1_client_handshake - Process TLS handshake
 123  * @conn: TLSv1 client connection data from tlsv1_client_init()
 124  * @in_data: Input data from TLS peer
 125  * @in_len: Input data length
 126  * @out_len: Length of the output buffer.
 127  * @appl_data: Pointer to application data pointer, or %NULL if dropped
 128  * @appl_data_len: Pointer to variable that is set to appl_data length
 129  * Returns: Pointer to output data, %NULL on failure
 130  */
 131 u8 * tlsv1_client_handshake(struct tlsv1_client *conn,
 132                             const u8 *in_data, size_t in_len,
 133                             size_t *out_len, u8 **appl_data,
 134                             size_t *appl_data_len)
 135 {
 136         const u8 *pos, *end;
 137         u8 *msg = NULL, *in_msg, *in_pos, *in_end, alert, ct;
 138         size_t in_msg_len;
 139         int no_appl_data;
 140
 141         if (conn->state == CLIENT_HELLO) {
 142                 if (in_len)
 143                         return NULL;
 144                 return tls_send_client_hello(conn, out_len);
 145         }
 146
 147         if (in_data == NULL || in_len == 0)
 148                 return NULL;
 149
 150         pos = in_data;
 151         end = in_data + in_len;
 152         in_msg = os_malloc(in_len);
 153         if (in_msg == NULL)
 154                 return NULL;
 155
 156         /* Each received packet may include multiple records */
 157         while (pos < end) {
 158                 in_msg_len = in_len;
 159                 if (tlsv1_record_receive(&conn->rl, pos, end - pos,
 160                                          in_msg, &in_msg_len, &alert)) {
 161                         wpa_printf(MSG_DEBUG, "TLSv1: Processing received "
 162                                    "record failed");
 163                         tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
 164                         goto failed;
 165                 }
 166                 ct = pos[0];
 167
 168                 in_pos = in_msg;
 169                 in_end = in_msg + in_msg_len;
 170
 171                 /* Each received record may include multiple messages of the
 172                  * same ContentType. */
 173                 while (in_pos < in_end) {
 174                         in_msg_len = in_end - in_pos;
 175                         if (tlsv1_client_process_handshake(conn, ct, in_pos,
 176                                                            &in_msg_len,
 177                                                            appl_data,
 178                                                            appl_data_len) < 0)
 179                                 goto failed;
 180                         in_pos += in_msg_len;
 181                 }
 182
 183                 pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
 184         }
 185
 186         os_free(in_msg);
 187         in_msg = NULL;
 188
 189         no_appl_data = appl_data == NULL || *appl_data == NULL;
 190         msg = tlsv1_client_handshake_write(conn, out_len, no_appl_data);
 191
 192 failed:
 193         os_free(in_msg);
 194         if (conn->alert_level) {
 195                 conn->state = FAILED;
 196                 os_free(msg);
 197                 msg = tlsv1_client_send_alert(conn, conn->alert_level,
 198                                               conn->alert_description,
 199                                               out_len);
 200         } else if (msg == NULL) {
 201                 msg = os_zalloc(1);
 202                 *out_len = 0;
 203         }
 204
 205         return msg;
 206 }
 207
 208
 209 /**
 210  * tlsv1_client_encrypt - Encrypt data into TLS tunnel
 211  * @conn: TLSv1 client connection data from tlsv1_client_init()
 212  * @in_data: Pointer to plaintext data to be encrypted
 213  * @in_len: Input buffer length
 214  * @out_data: Pointer to output buffer (encrypted TLS data)
 215  * @out_len: Maximum out_data length
 216  * Returns: Number of bytes written to out_data, -1 on failure
 217  *
 218  * This function is used after TLS handshake has been completed successfully to
 219  * send data in the encrypted tunnel.
 220  */
 221 int tlsv1_client_encrypt(struct tlsv1_client *conn,
 222                          const u8 *in_data, size_t in_len,
 223                          u8 *out_data, size_t out_len)
 224 {
 225         size_t rlen;
 226
 227         wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: Plaintext AppData",
 228                         in_data, in_len);
 229
 230         os_memcpy(out_data + TLS_RECORD_HEADER_LEN, in_data, in_len);
 231
 232         if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_APPLICATION_DATA,
 233                               out_data, out_len, in_len, &rlen) < 0) {
 234                 wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
 235                 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
 236                           TLS_ALERT_INTERNAL_ERROR);
 237                 return -1;
 238         }
 239
 240         return rlen;
 241 }
 242
 243
 244 /**
 245  * tlsv1_client_decrypt - Decrypt data from TLS tunnel
 246  * @conn: TLSv1 client connection data from tlsv1_client_init()
 247  * @in_data: Pointer to input buffer (encrypted TLS data)
 248  * @in_len: Input buffer length
 249  * @out_data: Pointer to output buffer (decrypted data from TLS tunnel)
 250  * @out_len: Maximum out_data length
 251  * Returns: Number of bytes written to out_data, -1 on failure
 252  *
 253  * This function is used after TLS handshake has been completed successfully to
 254  * receive data from the encrypted tunnel.
 255  */
 256 int tlsv1_client_decrypt(struct tlsv1_client *conn,
 257                          const u8 *in_data, size_t in_len,
 258                          u8 *out_data, size_t out_len)
 259 {
 260         const u8 *in_end, *pos;
 261         int res;
 262         u8 alert, *out_end, *out_pos;
 263         size_t olen;
 264
 265         pos = in_data;
 266         in_end = in_data + in_len;
 267         out_pos = out_data;
 268         out_end = out_data + out_len;
 269
 270         while (pos < in_end) {
 271                 if (pos[0] != TLS_CONTENT_TYPE_APPLICATION_DATA) {
 272                         wpa_printf(MSG_DEBUG, "TLSv1: Unexpected content type "
 273                                    "0x%x", pos[0]);
 274                         tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
 275                                   TLS_ALERT_UNEXPECTED_MESSAGE);
 276                         return -1;
 277                 }
 278
 279                 olen = out_end - out_pos;
 280                 res = tlsv1_record_receive(&conn->rl, pos, in_end - pos,
 281                                            out_pos, &olen, &alert);
 282                 if (res < 0) {
 283                         wpa_printf(MSG_DEBUG, "TLSv1: Record layer processing "
 284                                    "failed");
 285                         tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
 286                         return -1;
 287                 }
 288                 out_pos += olen;
 289                 if (out_pos > out_end) {
 290                         wpa_printf(MSG_DEBUG, "TLSv1: Buffer not large enough "
 291                                    "for processing the received record");
 292                         tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
 293                                   TLS_ALERT_INTERNAL_ERROR);
 294                         return -1;
 295                 }
 296
 297                 pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
 298         }
 299
 300         return out_pos - out_data;
 301 }
 302
 303
 304 /**
 305  * tlsv1_client_global_init - Initialize TLSv1 client
 306  * Returns: 0 on success, -1 on failure
 307  *
 308  * This function must be called before using any other TLSv1 client functions.
 309  */
 310 int tlsv1_client_global_init(void)
 311 {
 312         return crypto_global_init();
 313 }
 314
 315
 316 /**
 317  * tlsv1_client_global_deinit - Deinitialize TLSv1 client
 318  *
 319  * This function can be used to deinitialize the TLSv1 client that was
 320  * initialized by calling tlsv1_client_global_init(). No TLSv1 client functions
 321  * can be called after this before calling tlsv1_client_global_init() again.
 322  */
 323 void tlsv1_client_global_deinit(void)
 324 {
 325         crypto_global_deinit();
 326 }
 327
 328
 329 /**
 330  * tlsv1_client_init - Initialize TLSv1 client connection
 331  * Returns: Pointer to TLSv1 client connection data or %NULL on failure
 332  */
 333 struct tlsv1_client * tlsv1_client_init(void)
 334 {
 335         struct tlsv1_client *conn;
 336         size_t count;
 337         u16 *suites;
 338
 339         conn = os_zalloc(sizeof(*conn));
 340         if (conn == NULL)
 341                 return NULL;
 342
 343         conn->state = CLIENT_HELLO;
 344
 345         if (tls_verify_hash_init(&conn->verify) < 0) {
 346                 wpa_printf(MSG_DEBUG, "TLSv1: Failed to initialize verify "
 347                            "hash");
 348                 os_free(conn);
 349                 return NULL;
 350         }
 351
 352         count = 0;
 353         suites = conn->cipher_suites;
 354 #ifndef CONFIG_CRYPTO_INTERNAL
 355         suites[count++] = TLS_RSA_WITH_AES_256_CBC_SHA;
 356 #endif /* CONFIG_CRYPTO_INTERNAL */
 357         suites[count++] = TLS_RSA_WITH_AES_128_CBC_SHA;
 358         suites[count++] = TLS_RSA_WITH_3DES_EDE_CBC_SHA;
 359         suites[count++] = TLS_RSA_WITH_RC4_128_SHA;
 360         suites[count++] = TLS_RSA_WITH_RC4_128_MD5;
 361         conn->num_cipher_suites = count;
 362
 363         return conn;
 364 }
 365
 366
 367 /**
 368  * tlsv1_client_deinit - Deinitialize TLSv1 client connection
 369  * @conn: TLSv1 client connection data from tlsv1_client_init()
 370  */
 371 void tlsv1_client_deinit(struct tlsv1_client *conn)
 372 {
 373         crypto_public_key_free(conn->server_rsa_key);
 374         tlsv1_record_set_cipher_suite(&conn->rl, TLS_NULL_WITH_NULL_NULL);
 375         tlsv1_record_change_write_cipher(&conn->rl);
 376         tlsv1_record_change_read_cipher(&conn->rl);
 377         tls_verify_hash_free(&conn->verify);
 378         os_free(conn->client_hello_ext);
 379         tlsv1_client_free_dh(conn);
 380         tlsv1_cred_free(conn->cred);
 381         os_free(conn);
 382 }
 383
 384
 385 /**
 386  * tlsv1_client_established - Check whether connection has been established
 387  * @conn: TLSv1 client connection data from tlsv1_client_init()
 388  * Returns: 1 if connection is established, 0 if not
 389  */
 390 int tlsv1_client_established(struct tlsv1_client *conn)
 391 {
 392         return conn->state == ESTABLISHED;
 393 }
 394
 395
 396 /**
 397  * tlsv1_client_prf - Use TLS-PRF to derive keying material
 398  * @conn: TLSv1 client connection data from tlsv1_client_init()
 399  * @label: Label (e.g., description of the key) for PRF
 400  * @server_random_first: seed is 0 = client_random|server_random,
 401  * 1 = server_random|client_random
 402  * @out: Buffer for output data from TLS-PRF
 403  * @out_len: Length of the output buffer
 404  * Returns: 0 on success, -1 on failure
 405  */
 406 int tlsv1_client_prf(struct tlsv1_client *conn, const char *label,
 407                      int server_random_first, u8 *out, size_t out_len)
 408 {
 409         u8 seed[2 * TLS_RANDOM_LEN];
 410
 411         if (conn->state != ESTABLISHED)
 412                 return -1;
 413
 414         if (server_random_first) {
 415                 os_memcpy(seed, conn->server_random, TLS_RANDOM_LEN);
 416                 os_memcpy(seed + TLS_RANDOM_LEN, conn->client_random,
 417                           TLS_RANDOM_LEN);
 418         } else {
 419                 os_memcpy(seed, conn->client_random, TLS_RANDOM_LEN);
 420                 os_memcpy(seed + TLS_RANDOM_LEN, conn->server_random,
 421                           TLS_RANDOM_LEN);
 422         }
 423
 424         return tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
 425                        label, seed, 2 * TLS_RANDOM_LEN, out, out_len);
 426 }
 427
 428
 429 /**
 430  * tlsv1_client_get_cipher - Get current cipher name
 431  * @conn: TLSv1 client connection data from tlsv1_client_init()
 432  * @buf: Buffer for the cipher name
 433  * @buflen: buf size
 434  * Returns: 0 on success, -1 on failure
 435  *
 436  * Get the name of the currently used cipher.
 437  */
 438 int tlsv1_client_get_cipher(struct tlsv1_client *conn, char *buf,
 439                             size_t buflen)
 440 {
 441         char *cipher;
 442
 443         switch (conn->rl.cipher_suite) {
 444         case TLS_RSA_WITH_RC4_128_MD5:
 445                 cipher = "RC4-MD5";
 446                 break;
 447         case TLS_RSA_WITH_RC4_128_SHA:
 448                 cipher = "RC4-SHA";
 449                 break;
 450         case TLS_RSA_WITH_DES_CBC_SHA:
 451                 cipher = "DES-CBC-SHA";
 452                 break;
 453         case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
 454                 cipher = "DES-CBC3-SHA";
 455                 break;
 456         case TLS_DH_anon_WITH_AES_128_CBC_SHA:
 457                 cipher = "ADH-AES-128-SHA";
 458                 break;
 459         case TLS_RSA_WITH_AES_256_CBC_SHA:
 460                 cipher = "AES-256-SHA";
 461                 break;
 462         case TLS_RSA_WITH_AES_128_CBC_SHA:
 463                 cipher = "AES-128-SHA";
 464                 break;
 465         default:
 466                 return -1;
 467         }
 468
 469         if (os_strlcpy(buf, cipher, buflen) >= buflen)
 470                 return -1;
 471         return 0;
 472 }
 473
 474
 475 /**
 476  * tlsv1_client_shutdown - Shutdown TLS connection
 477  * @conn: TLSv1 client connection data from tlsv1_client_init()
 478  * Returns: 0 on success, -1 on failure
 479  */
 480 int tlsv1_client_shutdown(struct tlsv1_client *conn)
 481 {
 482         conn->state = CLIENT_HELLO;
 483
 484         if (tls_verify_hash_init(&conn->verify) < 0) {
 485                 wpa_printf(MSG_DEBUG, "TLSv1: Failed to re-initialize verify "
 486                            "hash");
 487                 return -1;
 488         }
 489
 490         tlsv1_record_set_cipher_suite(&conn->rl, TLS_NULL_WITH_NULL_NULL);
 491         tlsv1_record_change_write_cipher(&conn->rl);
 492         tlsv1_record_change_read_cipher(&conn->rl);
 493
 494         conn->certificate_requested = 0;
 495         crypto_public_key_free(conn->server_rsa_key);
 496         conn->server_rsa_key = NULL;
 497         conn->session_resumed = 0;
 498
 499         return 0;
 500 }
 501
 502
 503 /**
 504  * tlsv1_client_resumed - Was session resumption used
 505  * @conn: TLSv1 client connection data from tlsv1_client_init()
 506  * Returns: 1 if current session used session resumption, 0 if not
 507  */
 508 int tlsv1_client_resumed(struct tlsv1_client *conn)
 509 {
 510         return !!conn->session_resumed;
 511 }
 512
 513
 514 /**
 515  * tlsv1_client_hello_ext - Set TLS extension for ClientHello
 516  * @conn: TLSv1 client connection data from tlsv1_client_init()
 517  * @ext_type: Extension type
 518  * @data: Extension payload (%NULL to remove extension)
 519  * @data_len: Extension payload length
 520  * Returns: 0 on success, -1 on failure
 521  */
 522 int tlsv1_client_hello_ext(struct tlsv1_client *conn, int ext_type,
 523                            const u8 *data, size_t data_len)
 524 {
 525         u8 *pos;
 526
 527         conn->session_ticket_included = 0;
 528         os_free(conn->client_hello_ext);
 529         conn->client_hello_ext = NULL;
 530         conn->client_hello_ext_len = 0;
 531
 532         if (data == NULL || data_len == 0)
 533                 return 0;
 534
 535         pos = conn->client_hello_ext = os_malloc(6 + data_len);
 536         if (pos == NULL)
 537                 return -1;
 538
 539         WPA_PUT_BE16(pos, 4 + data_len);
 540         pos += 2;
 541         WPA_PUT_BE16(pos, ext_type);
 542         pos += 2;
 543         WPA_PUT_BE16(pos, data_len);
 544         pos += 2;
 545         os_memcpy(pos, data, data_len);
 546         conn->client_hello_ext_len = 6 + data_len;
 547
 548         if (ext_type == TLS_EXT_PAC_OPAQUE) {
 549                 conn->session_ticket_included = 1;
 550                 wpa_printf(MSG_DEBUG, "TLSv1: Using session ticket");
 551         }
 552
 553         return 0;
 554 }
 555
 556
 557 /**
 558  * tlsv1_client_get_keys - Get master key and random data from TLS connection
 559  * @conn: TLSv1 client connection data from tlsv1_client_init()
 560  * @keys: Structure of key/random data (filled on success)
 561  * Returns: 0 on success, -1 on failure
 562  */
 563 int tlsv1_client_get_keys(struct tlsv1_client *conn, struct tls_keys *keys)
 564 {
 565         os_memset(keys, 0, sizeof(*keys));
 566         if (conn->state == CLIENT_HELLO)
 567                 return -1;
 568
 569         keys->client_random = conn->client_random;
 570         keys->client_random_len = TLS_RANDOM_LEN;
 571
 572         if (conn->state != SERVER_HELLO) {
 573                 keys->server_random = conn->server_random;
 574                 keys->server_random_len = TLS_RANDOM_LEN;
 575                 keys->master_key = conn->master_secret;
 576                 keys->master_key_len = TLS_MASTER_SECRET_LEN;
 577         }
 578
 579         return 0;
 580 }
 581
 582
 583 /**
 584  * tlsv1_client_get_keyblock_size - Get TLS key_block size
 585  * @conn: TLSv1 client connection data from tlsv1_client_init()
 586  * Returns: Size of the key_block for the negotiated cipher suite or -1 on
 587  * failure
 588  */
 589 int tlsv1_client_get_keyblock_size(struct tlsv1_client *conn)
 590 {
 591         if (conn->state == CLIENT_HELLO || conn->state == SERVER_HELLO)
 592                 return -1;
 593
 594         return 2 * (conn->rl.hash_size + conn->rl.key_material_len +
 595                     conn->rl.iv_size);
 596 }
 597
 598
 599 /**
 600  * tlsv1_client_set_cipher_list - Configure acceptable cipher suites
 601  * @conn: TLSv1 client connection data from tlsv1_client_init()
 602  * @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers
 603  * (TLS_CIPHER_*).
 604  * Returns: 0 on success, -1 on failure
 605  */
 606 int tlsv1_client_set_cipher_list(struct tlsv1_client *conn, u8 *ciphers)
 607 {
 608         size_t count;
 609         u16 *suites;
 610
 611         /* TODO: implement proper configuration of cipher suites */
 612         if (ciphers[0] == TLS_CIPHER_ANON_DH_AES128_SHA) {
 613                 count = 0;
 614                 suites = conn->cipher_suites;
 615 #ifndef CONFIG_CRYPTO_INTERNAL
 616                 suites[count++] = TLS_DH_anon_WITH_AES_256_CBC_SHA;
 617 #endif /* CONFIG_CRYPTO_INTERNAL */
 618                 suites[count++] = TLS_DH_anon_WITH_AES_128_CBC_SHA;
 619                 suites[count++] = TLS_DH_anon_WITH_3DES_EDE_CBC_SHA;
 620                 suites[count++] = TLS_DH_anon_WITH_RC4_128_MD5;
 621                 suites[count++] = TLS_DH_anon_WITH_DES_CBC_SHA;
 622
 623                 /*
 624                  * Cisco AP (at least 350 and 1200 series) local authentication
 625                  * server does not know how to search cipher suites from the
 626                  * list and seem to require that the last entry in the list is
 627                  * the one that it wants to use. However, TLS specification
 628                  * requires the list to be in the client preference order. As a
 629                  * workaround, add anon-DH AES-128-SHA1 again at the end of the
 630                  * list to allow the Cisco code to find it.
 631                  */
 632                 suites[count++] = TLS_DH_anon_WITH_AES_128_CBC_SHA;
 633                 conn->num_cipher_suites = count;
 634         }
 635
 636         return 0;
 637 }
 638
 639
 640 /**
 641  * tlsv1_client_set_cred - Set client credentials
 642  * @conn: TLSv1 client connection data from tlsv1_client_init()
 643  * @cred: Credentials from tlsv1_cred_alloc()
 644  * Returns: 0 on success, -1 on failure
 645  *
 646  * On success, the client takes ownership of the credentials block and caller
 647  * must not free it. On failure, caller is responsible for freeing the
 648  * credential block.
 649  */
 650 int tlsv1_client_set_cred(struct tlsv1_client *conn,
 651                           struct tlsv1_credentials *cred)
 652 {
 653         tlsv1_cred_free(conn->cred);
 654         conn->cred = cred;
 655         return 0;
 656 }
 657
 658
 659 void tlsv1_client_set_session_ticket_cb(struct tlsv1_client *conn,
 660                                         tlsv1_client_session_ticket_cb cb,
 661                                         void *ctx)
 662 {
 663         wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket callback set %p (ctx %p)",
 664                    cb, ctx);
 665         conn->session_ticket_cb = cb;
 666         conn->session_ticket_cb_ctx = ctx;
 667 }