1 /* 2 * TLSv1 Record Protocol 3 * Copyright (c) 2006-2011, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef TLSV1_RECORD_H 10 #define TLSV1_RECORD_H 11 12 #include "crypto/crypto.h" 13 14 #define TLS_MAX_WRITE_MAC_SECRET_LEN 32 15 #define TLS_MAX_WRITE_KEY_LEN 32 16 #define TLS_MAX_IV_LEN 16 17 #define TLS_MAX_KEY_BLOCK_LEN (2 * (TLS_MAX_WRITE_MAC_SECRET_LEN + \ 18 TLS_MAX_WRITE_KEY_LEN + TLS_MAX_IV_LEN)) 19 20 #define TLS_SEQ_NUM_LEN 8 21 #define TLS_RECORD_HEADER_LEN 5 22 23 /* ContentType */ 24 enum { 25 TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC = 20, 26 TLS_CONTENT_TYPE_ALERT = 21, 27 TLS_CONTENT_TYPE_HANDSHAKE = 22, 28 TLS_CONTENT_TYPE_APPLICATION_DATA = 23 29 }; 30 31 struct tlsv1_record_layer { 32 u16 tls_version; 33 34 u8 write_mac_secret[TLS_MAX_WRITE_MAC_SECRET_LEN]; 35 u8 read_mac_secret[TLS_MAX_WRITE_MAC_SECRET_LEN]; 36 u8 write_key[TLS_MAX_WRITE_KEY_LEN]; 37 u8 read_key[TLS_MAX_WRITE_KEY_LEN]; 38 u8 write_iv[TLS_MAX_IV_LEN]; 39 u8 read_iv[TLS_MAX_IV_LEN]; 40 41 size_t hash_size; 42 size_t key_material_len; 43 size_t iv_size; /* also block_size */ 44 45 enum crypto_hash_alg hash_alg; 46 enum crypto_cipher_alg cipher_alg; 47 48 u8 write_seq_num[TLS_SEQ_NUM_LEN]; 49 u8 read_seq_num[TLS_SEQ_NUM_LEN]; 50 51 u16 cipher_suite; 52 u16 write_cipher_suite; 53 u16 read_cipher_suite; 54 55 struct crypto_cipher *write_cbc; 56 struct crypto_cipher *read_cbc; 57 }; 58 59 60 int tlsv1_record_set_cipher_suite(struct tlsv1_record_layer *rl, 61 u16 cipher_suite); 62 int tlsv1_record_change_write_cipher(struct tlsv1_record_layer *rl); 63 int tlsv1_record_change_read_cipher(struct tlsv1_record_layer *rl); 64 int tlsv1_record_send(struct tlsv1_record_layer *rl, u8 content_type, u8 *buf, 65 size_t buf_size, const u8 *payload, size_t payload_len, 66 size_t *out_len); 67 int tlsv1_record_receive(struct tlsv1_record_layer *rl, 68 const u8 *in_data, size_t in_len, 69 u8 *out_data, size_t *out_len, u8 *alert); 70 71 #endif /* TLSV1_RECORD_H */ 72