aes_cbc_crypt.h revision 23c57df72989c916b3e98084eb88d48777999691
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _AES_CBC_CRYPT_H
#define _AES_CBC_CRYPT_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include "aes_impl.h"
/*
* ac_keysched: Pointer to key schedule.
*
* ac_keysched_len: Length of the key schedule.
*
* ac_remainder: This is for residual data, i.e. data that can't
* be processed because there are too few bytes.
* Must wait until more data arrives.
*
* ac_remainder_len: Number of bytes in ac_remainder.
*
* ac_iv: Scratch buffer that sometimes contains the IV.
*
* ac_lastblock: Scratch buffer.
*
* ac_lastp: Pointer to previous block of ciphertext.
*
* ac_copy_to: Pointer to where encrypted residual data needs
* to be copied.
*
* ac_flags: AES_PROVIDER_OWNS_KEY_SCHEDULE
* When a context is freed, it is necessary
* to know whether the key schedule was allocated
* by the caller, or by aes_encrypt_init() or
* aes_decrypt_init(). If allocated by the latter,
* then it needs to be freed.
*
* AES_ECB_MODE, AES_CBC_MODE, or AES_CTR_MODE
* AES_CCM_MODE
*
* ac_ccm_mac_len: Stores length of the MAC in CCM mode.
* ac_ccm_mac_buf: Stores the intermediate value for MAC in CCM encrypt.
* In CCM decrypt, stores the input MAC value.
* ac_ccm_data_len: Length of the plaintext for CCM mode encrypt, or
* length of the ciphertext for CCM mode decrypt.
* ac_ccm_processed_data_len:
* Length of processed plaintext in CCM mode encrypt,
* or length of processed ciphertext for CCM mode decrypt.
* ac_ccm_processed_mac_len:
* Length of MAC data accumulated in CCM mode decrypt.
*
* ac_ccm_pt_buf: Only used in CCM mode decrypt. It stores the
* decrypted plaintext to be returned when
* MAC verification succeeds in decrypt_final.
* Memory for this should be allocated in the AES module.
*
*/
typedef struct aes_ctx {
void *ac_keysched;
} aes_ctx_t;
/*
* ac_cb Counter block.
*
* ac_counter_mask Mask of counter bits in the last 8 bytes of the
* counter block.
*/
#define ac_counter_mask ac_lastblock[0]
#define AES_PROVIDER_OWNS_KEY_SCHEDULE 0x00000001
#define AES_ECB_MODE 0x00000002
#define AES_CBC_MODE 0x00000004
#define AES_CTR_MODE 0x00000008
#define AES_CCM_MODE 0x00000010
crypto_data_t *);
crypto_data_t *);
unsigned char *, size_t);
#ifdef __cplusplus
}
#endif
#endif /* _AES_CBC_CRYPT_H */