KeccakHash.h

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/*
Implementation by the Keccak, Keyak and Ketje Teams, namely, Guido Bertoni,
Joan Daemen, Michaël Peeters, Gilles Van Assche and Ronny Van Keer, hereby
denoted as "the implementer".
 
For more information, feedback or questions, please refer to our websites:
http://keccak.noekeon.org/
http://keyak.noekeon.org/
http://ketje.noekeon.org/
 
To the extent possible under law, the implementer has waived all copyright
and related or neighboring rights to the source code in this file.
http://creativecommons.org/publicdomain/zero/1.0/
*/
 
#ifndef _KeccakHashInterface_h_
#define _KeccakHashInterface_h_
 
#ifndef KeccakP1600_excluded
 
#include "KeccakSponge.h"
#include <string.h>
 
typedef unsigned char BitSequence;
typedef size_t DataLength;
typedef enum { SUCCESS = 0, FAIL = 1, BAD_HASHLEN = 2 } HashReturn;
 
typedef struct {
    KeccakWidth1600_SpongeInstance sponge;
    unsigned int fixedOutputLength;
    unsigned char delimitedSuffix;
} Keccak_HashInstance;

HashReturn Keccak_HashInitialize(Keccak_HashInstance *hashInstance, unsigned int rate, unsigned int capacity, unsigned int hashbitlen, unsigned char delimitedSuffix);

#define Keccak_HashInitialize_SHAKE128(hashInstance)        Keccak_HashInitialize(hashInstance, 1344,  256,   0, 0x1F)

#define Keccak_HashInitialize_SHAKE256(hashInstance)        Keccak_HashInitialize(hashInstance, 1088,  512,   0, 0x1F)

#define Keccak_HashInitialize_SHA3_224(hashInstance)        Keccak_HashInitialize(hashInstance, 1152,  448, 224, 0x06)

#define Keccak_HashInitialize_SHA3_256(hashInstance)        Keccak_HashInitialize(hashInstance, 1088,  512, 256, 0x06)

#define Keccak_HashInitialize_SHA3_384(hashInstance)        Keccak_HashInitialize(hashInstance,  832,  768, 384, 0x06)

#define Keccak_HashInitialize_SHA3_512(hashInstance)        Keccak_HashInitialize(hashInstance,  576, 1024, 512, 0x06)

HashReturn Keccak_HashUpdate(Keccak_HashInstance *hashInstance, const BitSequence *data, DataLength databitlen);

HashReturn Keccak_HashFinal(Keccak_HashInstance *hashInstance, BitSequence *hashval);

HashReturn Keccak_HashSqueeze(Keccak_HashInstance *hashInstance, BitSequence *data, DataLength databitlen);
 
#define Keccak_HashInstance_ImplType 32
 
#endif
 
#endif