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
17typedef 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
26err_status_t
27aes_icm_context_init(aes_icm_ctx_t *c,
28		     const unsigned char *key);
29
30err_status_t
31aes_icm_set_iv(aes_icm_ctx_t *c, void *iv);
32
33err_status_t
34aes_icm_encrypt(aes_icm_ctx_t *c,
35		unsigned char *buf, unsigned int *bytes_to_encr);
36
37err_status_t
38aes_icm_output(aes_icm_ctx_t *c,
39	       unsigned char *buf, int bytes_to_output);
40
41err_status_t
42aes_icm_dealloc(cipher_t *c);
43
44err_status_t
45aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c,
46			 unsigned char *buf,
47			 unsigned int *enc_len,
48			 int forIsmacryp);
49
50err_status_t
51aes_icm_alloc_ismacryp(cipher_t **c,
52		       int key_len,
53		       int forIsmacryp);
54
55#endif /* AES_ICM_H */
56
57