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/*
* aes_icm.h
*
* Header for AES Integer Counter Mode.
*
* David A. McGrew
* Cisco Systems, Inc.
*
*/
#ifndef AES_ICM_H
#define AES_ICM_H
#include "aes.h"
#include "cipher.h"
typedef struct {
v128_t counter; /* holds the counter value */
v128_t offset; /* initial offset value */
v128_t keystream_buffer; /* buffers bytes of keystream */
aes_expanded_key_t expanded_key; /* the cipher key */
int bytes_in_buffer; /* number of unused bytes in buffer */
} aes_icm_ctx_t;
err_status_t
aes_icm_context_init(aes_icm_ctx_t *c,
const unsigned char *key,
int key_len);
err_status_t
aes_icm_set_iv(aes_icm_ctx_t *c, void *iv, int direction);
err_status_t
aes_icm_encrypt(aes_icm_ctx_t *c,
unsigned char *buf, unsigned int *bytes_to_encr);
err_status_t
aes_icm_output(aes_icm_ctx_t *c,
unsigned char *buf, unsigned int bytes_to_output);
err_status_t
aes_icm_dealloc(cipher_t *c);
err_status_t
aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c,
unsigned char *buf,
unsigned int *enc_len,
int forIsmacryp);
err_status_t
aes_icm_alloc_ismacryp(cipher_t **c,
int key_len,
int forIsmacryp);
uint16_t
aes_icm_bytes_encrypted(aes_icm_ctx_t *c);
#endif /* AES_ICM_H */
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