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74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
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/* 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 RHASH_SHA3_H
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#define RHASH_SHA3_H
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#include <stdint.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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/**
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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 rhash_sha3_224_init(sha3_ctx *ctx);
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void rhash_sha3_256_init(sha3_ctx *ctx);
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void rhash_sha3_384_init(sha3_ctx *ctx);
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void rhash_sha3_512_init(sha3_ctx *ctx);
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void rhash_sha3_update(sha3_ctx *ctx, const unsigned char* msg, size_t size);
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void rhash_sha3_final(sha3_ctx *ctx, unsigned char* result);
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#ifdef USE_KECCAK
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#define rhash_keccak_224_init rhash_sha3_224_init
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#define rhash_keccak_256_init rhash_sha3_256_init
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#define rhash_keccak_384_init rhash_sha3_384_init
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#define rhash_keccak_512_init rhash_sha3_512_init
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#define rhash_keccak_update rhash_sha3_update
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void rhash_keccak_final(sha3_ctx *ctx, unsigned char* result);
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#endif
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#ifdef __cplusplus
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} /* extern "C" */
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#endif /* __cplusplus */
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#endif /* RHASH_SHA3_H */
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