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