dist/wpa/src/tls/tlsv1_record.h

   1 /*
   2  * TLSv1 Record Protocol
   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 #ifndef TLSV1_RECORD_H
  16 #define TLSV1_RECORD_H
  17
  18 #include "crypto.h"
  19
  20 #define TLS_MAX_WRITE_MAC_SECRET_LEN 20
  21 #define TLS_MAX_WRITE_KEY_LEN 32
  22 #define TLS_MAX_IV_LEN 16
  23 #define TLS_MAX_KEY_BLOCK_LEN (2 * (TLS_MAX_WRITE_MAC_SECRET_LEN + \
  24                                     TLS_MAX_WRITE_KEY_LEN + TLS_MAX_IV_LEN))
  25
  26 #define TLS_SEQ_NUM_LEN 8
  27 #define TLS_RECORD_HEADER_LEN 5
  28
  29 /* ContentType */
  30 enum {
  31         TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC = 20,
  32         TLS_CONTENT_TYPE_ALERT = 21,
  33         TLS_CONTENT_TYPE_HANDSHAKE = 22,
  34         TLS_CONTENT_TYPE_APPLICATION_DATA = 23
  35 };
  36
  37 struct tlsv1_record_layer {
  38         u8 write_mac_secret[TLS_MAX_WRITE_MAC_SECRET_LEN];
  39         u8 read_mac_secret[TLS_MAX_WRITE_MAC_SECRET_LEN];
  40         u8 write_key[TLS_MAX_WRITE_KEY_LEN];
  41         u8 read_key[TLS_MAX_WRITE_KEY_LEN];
  42         u8 write_iv[TLS_MAX_IV_LEN];
  43         u8 read_iv[TLS_MAX_IV_LEN];
  44
  45         size_t hash_size;
  46         size_t key_material_len;
  47         size_t iv_size; /* also block_size */
  48
  49         enum crypto_hash_alg hash_alg;
  50         enum crypto_cipher_alg cipher_alg;
  51
  52         u8 write_seq_num[TLS_SEQ_NUM_LEN];
  53         u8 read_seq_num[TLS_SEQ_NUM_LEN];
  54
  55         u16 cipher_suite;
  56         u16 write_cipher_suite;
  57         u16 read_cipher_suite;
  58
  59         struct crypto_cipher *write_cbc;
  60         struct crypto_cipher *read_cbc;
  61 };
  62
  63
  64 int tlsv1_record_set_cipher_suite(struct tlsv1_record_layer *rl,
  65                                   u16 cipher_suite);
  66 int tlsv1_record_change_write_cipher(struct tlsv1_record_layer *rl);
  67 int tlsv1_record_change_read_cipher(struct tlsv1_record_layer *rl);
  68 int tlsv1_record_send(struct tlsv1_record_layer *rl, u8 content_type, u8 *buf,
  69                       size_t buf_size, size_t payload_len, size_t *out_len);
  70 int tlsv1_record_receive(struct tlsv1_record_layer *rl,
  71                          const u8 *in_data, size_t in_len,
  72                          u8 *out_data, size_t *out_len, u8 *alert);
  73
  74 #endif /* TLSV1_RECORD_H */