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/*
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* Copyright (C) 2008 Vincent Hanquez <tab@snarc.org>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of his contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* AES implementation
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*/
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#ifndef CRYPTONITE_AES_H
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#define CRYPTONITE_AES_H
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#include <stdint.h>
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#include "aes/block128.h"
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typedef block128 aes_block;
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/* size = 456 */
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typedef struct {
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uint8_t nbr; /* number of rounds: 10 (128), 12 (192), 14 (256) */
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uint8_t strength; /* 128 = 0, 192 = 1, 256 = 2 */
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uint8_t _padding[6];
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uint8_t data[16*14*2];
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} aes_key;
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/* size = 4*16+2*8= 80 */
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typedef struct {
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aes_block tag;
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aes_block h;
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aes_block iv;
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aes_block civ;
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uint64_t length_aad;
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uint64_t length_input;
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} aes_gcm;
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typedef struct {
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block128 offset_aad;
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block128 offset_enc;
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block128 sum_aad;
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block128 sum_enc;
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block128 lstar;
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block128 ldollar;
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block128 li[4];
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} aes_ocb;
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/* in bytes: either 16,24,32 */
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void cryptonite_aes_initkey(aes_key *ctx, uint8_t *key, uint8_t size);
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void cryptonite_aes_encrypt(aes_block *output, aes_key *key, aes_block *input);
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void cryptonite_aes_decrypt(aes_block *output, aes_key *key, aes_block *input);
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void cryptonite_aes_encrypt_ecb(aes_block *output, aes_key *key, aes_block *input, uint32_t nb_blocks);
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void cryptonite_aes_decrypt_ecb(aes_block *output, aes_key *key, aes_block *input, uint32_t nb_blocks);
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void cryptonite_aes_encrypt_cbc(aes_block *output, aes_key *key, aes_block *iv, aes_block *input, uint32_t nb_blocks);
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void cryptonite_aes_decrypt_cbc(aes_block *output, aes_key *key, aes_block *iv, aes_block *input, uint32_t nb_blocks);
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void cryptonite_aes_gen_ctr(aes_block *output, aes_key *key, const aes_block *iv, uint32_t nb_blocks);
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void cryptonite_aes_gen_ctr_cont(aes_block *output, aes_key *key, aes_block *iv, uint32_t nb_blocks);
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void cryptonite_aes_encrypt_xts(aes_block *output, aes_key *key, aes_key *key2, aes_block *sector,
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uint32_t spoint, aes_block *input, uint32_t nb_blocks);
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void cryptonite_aes_decrypt_xts(aes_block *output, aes_key *key, aes_key *key2, aes_block *sector,
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uint32_t spoint, aes_block *input, uint32_t nb_blocks);
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void cryptonite_aes_gcm_init(aes_gcm *gcm, aes_key *key, uint8_t *iv, uint32_t len);
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void cryptonite_aes_gcm_aad(aes_gcm *gcm, uint8_t *input, uint32_t length);
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void cryptonite_aes_gcm_encrypt(uint8_t *output, aes_gcm *gcm, aes_key *key, uint8_t *input, uint32_t length);
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void cryptonite_aes_gcm_decrypt(uint8_t *output, aes_gcm *gcm, aes_key *key, uint8_t *input, uint32_t length);
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void cryptonite_aes_gcm_finish(uint8_t *tag, aes_gcm *gcm, aes_key *key);
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void cryptonite_aes_ocb_init(aes_ocb *ocb, aes_key *key, uint8_t *iv, uint32_t len);
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void cryptonite_aes_ocb_aad(aes_ocb *ocb, aes_key *key, uint8_t *input, uint32_t length);
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void cryptonite_aes_ocb_encrypt(uint8_t *output, aes_ocb *ocb, aes_key *key, uint8_t *input, uint32_t length);
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void cryptonite_aes_ocb_decrypt(uint8_t *output, aes_ocb *ocb, aes_key *key, uint8_t *input, uint32_t length);
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void cryptonite_aes_ocb_finish(uint8_t *tag, aes_ocb *ocb, aes_key *key);
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#endif
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