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AESCCM.h
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/*
* Copyright 2012 Xinxin Fan <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __AESCCM_H__
#define __AESCCM_H__
/**
* the parameter of the CCM*
*/
typedef struct
{
uint8 L; /* an integer 1 < L < 9*/
uint8 nonce_len; /* the nonce length in bytes */
uint8 tag_len; /* the authentication tag length in bytes */
uint8 k[16]; /* a 128-bit symmetric key k */
uint64 msg_len; /* message data length in bits: 0 <= msg_len < 2^(8*L) */
uint64 hdr_len; /* the associated data length in bits: 0 <= hdr_len < 2^64*/
} ccm_parameter;
/**
* authentication only mode in CCM*
*
* @param m an octet message m of length msg_len bits
* @param a an octet associate data a of length hdr_len bits
* @param nonce an octet string of length nonce_len bytes
* @param param the parameters of the CCM*
* @param tag a 128-bit authentication tag
*/
void ccm_auth_only(uint8 *m, uint8 *a, uint8 *nonce, ccm_parameter param, uint8 *tag);
/**
* authenticated encryption mode in CCM*
*
* @param m an octet message m of length msg_len bits
* @param a an octet associate data of length hdr_len bits
* @param nonce an octet string of length nonce_len bytes
* @param param the parameters of the CCM*
* @param c a ciphertext of length msg_len bits
* @param authtag an authentication tag of tag_len bytes
*/
void ccm_auth_enc(uint8 *m, uint8 *a, uint8 *nonce, ccm_parameter param, uint8 *c, uint8 *authtag);
/**
* authenticated decryption mode in CCM*
*
* @param c a ciphertext of length msg_len bits
* @param authtag an authentication tag of tag_len bytes
* @param nonce an octet string of length nonce_len bytes
* @param param the parameters of the CCM*
* @param m an octet message m of length msg_len bits
* @param u an authenticator of length tag_len bytes
*/
void ccm_auth_dec(uint8 *c, uint8 *authtag, uint8 *nonce, ccm_parameter param, uint8 *m, uint8 *u);
/**
* verification mode in CCM*
*
* @param m an octet message m of length msg_len bits
* @param a an octet associate data a of length hdr_len bits
* @param nonce an octet string of length nonce_len bytes
* @param param the parameters of the CCM*
* @param u an authenticator of length tag_len bytes
*/
uint8 ccm_veri_only(uint8 *m, uint8 *a, uint8 *nonce, ccm_parameter param, uint8 *u);
#endif /* __AESCCM_H__ */