aes_icm.h [include/srtp/aes_icm.h]

1	/*
2	* aes_icm.h
3	*
4	* Header for AES Integer Counter Mode.
5	*
6	* David A. McGrew
7	* Cisco Systems, Inc.
8	*
9	*/
10
11	#ifndef AES_ICM_H
12	#define AES_ICM_H
13
14	#include "aes.h"
15	#include "cipher.h"
16
17	typedef struct {
18	v128_t counter; / holds the counter value /
19	v128_t offset; / initial offset value /
20	v128_t keystream_buffer; / buffers bytes of keystream /
21	aes_expanded_key_t expanded_key; / the cipher key /
22	int bytes_in_buffer; / number of unused bytes in buffer /
23	} aes_icm_ctx_t;
24
25
26	err_status_t
27	aes_icm_context_init(aes_icm_ctx_t *c,
28	const unsigned char *key,
29	int key_len);
30
31	err_status_t
32	aes_icm_set_iv(aes_icm_ctx_t c, void* *iv);
33
34	err_status_t
35	aes_icm_encrypt(aes_icm_ctx_t *c,
36	unsigned char buf, unsigned* int *bytes_to_encr);
37
38	err_status_t
39	aes_icm_output(aes_icm_ctx_t *c,
40	unsigned char buf, int* bytes_to_output);
41
42	err_status_t
43	aes_icm_dealloc(cipher_t *c);
44
45	err_status_t
46	aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c,
47	unsigned char *buf,
48	unsigned int *enc_len,
49	int forIsmacryp);
50
51	err_status_t
52	aes_icm_alloc_ismacryp(cipher_t **c,
53	int key_len,
54	int forIsmacryp);
55
56	#endif /* AES_ICM_H */
57
58