60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
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/*
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The Keccak sponge function, designed by Guido Bertoni, Joan Daemen,
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Michaël Peeters and Gilles Van Assche. For more information, feedback or
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questions, please refer to our website: http://keccak.noekeon.org/
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Implementation by the designers,
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hereby denoted as "the implementer".
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To the extent possible under law, the implementer has waived all copyright
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and related or neighboring rights to the source code in this file.
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http://creativecommons.org/publicdomain/zero/1.0/
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*/
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#ifndef _KeccakDuplex_h_
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#define _KeccakDuplex_h_
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#define KeccakPermutationSize 1600
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#define KeccakPermutationSizeInBytes (KeccakPermutationSize/8)
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#if defined(__GNUC__)
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#define ALIGN __attribute__ ((aligned(32)))
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#elif defined(_MSC_VER)
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#define ALIGN __declspec(align(32))
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#else
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#define ALIGN
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#endif
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ALIGN typedef struct duplexStateStruct {
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ALIGN unsigned char state[KeccakPermutationSizeInBytes];
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unsigned int rate;
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unsigned int capacity;
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unsigned int rho_max;
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} duplexState;
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/**
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* Function to initialize a duplex object Duplex[Keccak-f[r+c], pad10*1, r].
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* @param state Pointer to the state of the duplex object to be initialized.
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* @param rate The value of the rate r.
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* @param capacity The value of the capacity c.
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* @pre One must have r+c=1600 in this implementation. (The value of the rate is unrestricted.)
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* @return Zero if successful, 1 otherwise.
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*/
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int InitDuplex(duplexState *state, unsigned int rate, unsigned int capacity);
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/**
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* Function to make a duplexing call to the duplex object intialized with InitDuplex().
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* @param state Pointer to the state of the duplex object initialized by InitDuplex().
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* @param in Pointer to the input data.
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* When @a inBitLen is not a multiple of 8, the last bits of data must be
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* in the least significant bits of the last byte.
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* @param inBitLen The number of input bits provided in the input data.
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* @param out Pointer to the buffer where to store the output data.
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* @param outBitLen The number of output bits desired.
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* @pre inBitLen ≤ (r-2)
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* @pre outBitLen ≤ r
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* @return Zero if successful, 1 otherwise.
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*/
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int Duplexing(duplexState *state, const unsigned char *in, unsigned int inBitLen, unsigned char *out, unsigned int outBitLen);
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#endif
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