tlsv1_record.h revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4 
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 */
24enum {
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
31struct 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
60int tlsv1_record_set_cipher_suite(struct tlsv1_record_layer *rl,
61				  u16 cipher_suite);
62int tlsv1_record_change_write_cipher(struct tlsv1_record_layer *rl);
63int tlsv1_record_change_read_cipher(struct tlsv1_record_layer *rl);
64int 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);
67int 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