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