84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* Copyright (C) 2016 Andreas Steffen
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*
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* Copyright (C) secunet Security Networks AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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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. See the GNU General Public License
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* for more details.
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n */
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/**
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* @defgroup sha3_keccak sha3_keccak
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* @{ @ingroup sha3_p
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*/
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#ifndef SHA3_KECCAK_H_
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#define SHA3_KECCAK_H_
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typedef struct sha3_keccak_t sha3_keccak_t;
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#include <crypto/hashers/hasher.h>
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/**
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* Implements the Keccak-f[1600] sponge function as defined by FIPS-202.
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*/
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struct sha3_keccak_t {
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/**
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* Get the available rate in bytes
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*
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* @return rate in bytes
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*/
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u_int (*get_rate)(sha3_keccak_t *this);
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/**
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* Resets the internal Keccak state
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*/
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void (*reset)(sha3_keccak_t *this);
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/**
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* Absorbs data into the Keccak state
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*
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* @param data data to be absorbed
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*/
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void (*absorb)(sha3_keccak_t *this, chunk_t data);
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/**
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* Finalize the absorption phase and switch to the squeeze phase
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*/
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void (*finalize)(sha3_keccak_t *this);
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/**
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* Squeeze the Keccak state to get output data
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* Can be called multiple times
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*
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* @param out_len number of output bytes requested
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* @param out output buffer, must comprise at least out_len bytes
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*/
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void (*squeeze)(sha3_keccak_t *this, size_t out_len, uint8_t *out);
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/**
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* Destroy the sha3_keccak_t object
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*/
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void (*destroy)(sha3_keccak_t *this);
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};
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/**
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* Creates a new sha3_keccak_t.
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*
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* @param capacity required capacity to achieve a given security level
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* @param delimited_suffix bits delimiting the input message
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* @return sha3_keccak_t object, NULL if capacity too big
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*/
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sha3_keccak_t *sha3_keccak_create(u_int capacity, uint8_t delimited_suffix);
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#endif /** SHA3_KECCAK_H_ @}*/
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