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90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* sha3.h - an implementation of Secure Hash Algorithm 3 (Keccak).
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* based on the
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* The Keccak SHA-3 submission. Submission to NIST (Round 3), 2011
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* by Guido Bertoni, Joan Daemen, Michaël Peeters and Gilles Van Assche
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*
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* Copyright: 2013 Aleksey Kravchenko <rhash.admin@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. Use this program at your own risk!
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*/
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#ifndef __SHA3_H__
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#define __SHA3_H__
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#include <stdint.h>
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#include "options.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define sha3_224_hash_size 28
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#define sha3_256_hash_size 32
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#define sha3_384_hash_size 48
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#define sha3_512_hash_size 64
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#define sha3_max_permutation_size 25
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#define sha3_max_rate_in_qwords 24
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#define SHA3_224_BLOCK_LENGTH 144
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#define SHA3_256_BLOCK_LENGTH 136
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#define SHA3_384_BLOCK_LENGTH 104
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#define SHA3_512_BLOCK_LENGTH 72
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#define SHA3_224_DIGEST_LENGTH sha3_224_hash_size
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#define SHA3_256_DIGEST_LENGTH sha3_256_hash_size
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#define SHA3_384_DIGEST_LENGTH sha3_384_hash_size
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#define SHA3_512_DIGEST_LENGTH sha3_512_hash_size
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/**
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* SHA3 Algorithm context.
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*/
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typedef struct SHA3_CTX
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{
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/* 1600 bits algorithm hashing state */
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uint64_t hash[sha3_max_permutation_size];
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/* 1536-bit buffer for leftovers */
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uint64_t message[sha3_max_rate_in_qwords];
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/* count of bytes in the message[] buffer */
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unsigned rest;
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/* size of a message block processed at once */
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unsigned block_size;
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} SHA3_CTX;
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/* methods for calculating the hash function */
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void sha3_224_Init(SHA3_CTX *ctx);
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void sha3_256_Init(SHA3_CTX *ctx);
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void sha3_384_Init(SHA3_CTX *ctx);
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void sha3_512_Init(SHA3_CTX *ctx);
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void sha3_Update(SHA3_CTX *ctx, const unsigned char* msg, size_t size);
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void sha3_Final(SHA3_CTX *ctx, unsigned char* result);
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#if USE_KECCAK
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#define keccak_224_Init sha3_224_Init
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#define keccak_256_Init sha3_256_Init
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#define keccak_384_Init sha3_384_Init
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#define keccak_512_Init sha3_512_Init
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#define keccak_Update sha3_Update
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void keccak_Final(SHA3_CTX *ctx, unsigned char* result);
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void keccak_256(const unsigned char* data, size_t len, unsigned char* digest);
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void keccak_512(const unsigned char* data, size_t len, unsigned char* digest);
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#endif
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void sha3_256(const unsigned char* data, size_t len, unsigned char* digest);
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void sha3_512(const unsigned char* data, size_t len, unsigned char* digest);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif /* __cplusplus */
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#endif /* __SHA3_H__ */
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