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/*
* SHA3 implementation.
*
* Copyright (c) 2014 Marko Kreen
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _USUAL_CRYPTO_SHA3_H_
#define _USUAL_CRYPTO_SHA3_H_
#include <usual/crypto/keccak.h>
#define SHA3_224_CAPACITY 448
#define SHA3_256_CAPACITY 512
#define SHA3_384_CAPACITY 768
#define SHA3_512_CAPACITY 1024
#define SHAKE128_CAPACITY 256
#define SHAKE256_CAPACITY 512
#define SHA3_224_DIGEST_LENGTH (224/8)
#define SHA3_256_DIGEST_LENGTH (256/8)
#define SHA3_384_DIGEST_LENGTH (384/8)
#define SHA3_512_DIGEST_LENGTH (512/8)
#define SHAKE128_DIGEST_LENGTH (256/8)
#define SHAKE256_DIGEST_LENGTH (512/8)
#define SHA3_224_BLOCK_SIZE ((1600 - SHA3_224_CAPACITY) / 8)
#define SHA3_256_BLOCK_SIZE ((1600 - SHA3_256_CAPACITY) / 8)
#define SHA3_384_BLOCK_SIZE ((1600 - SHA3_384_CAPACITY) / 8)
#define SHA3_512_BLOCK_SIZE ((1600 - SHA3_512_CAPACITY) / 8)
#define SHAKE128_BLOCK_SIZE ((1600 - SHAKE128_CAPACITY) / 8)
#define SHAKE256_BLOCK_SIZE ((1600 - SHAKE256_CAPACITY) / 8)
struct SHA3Context {
struct KeccakContext kctx;
bool padded;
uint8_t pad;
unsigned int obytes;
};
void sha3_224_reset(struct SHA3Context *ctx);
void sha3_256_reset(struct SHA3Context *ctx);
void sha3_384_reset(struct SHA3Context *ctx);
void sha3_512_reset(struct SHA3Context *ctx);
void sha3_update(struct SHA3Context *ctx, const void *ptr, unsigned len);
void sha3_final(struct SHA3Context *ctx, void *dst);
void shake128_reset(struct SHA3Context *ctx);
void shake256_reset(struct SHA3Context *ctx);
void shake_update(struct SHA3Context *ctx, const void *ptr, unsigned len);
void shake_extract(struct SHA3Context *ctx, void *dst, unsigned count);
#endif
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