67 lines
2 KiB
C
67 lines
2 KiB
C
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#ifndef _AHS_API_H_
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#define _AHS_API_H_
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/***********************************************************************
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**
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** Interface declarations of the AHS API using the Skein hash function.
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**
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** Source code author: Doug Whiting, 2008.
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**
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** This algorithm and source code is released to the public domain.
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**
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************************************************************************/
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#include "skein.h"
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typedef enum
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{
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SUCCESS = SKEIN_SUCCESS,
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FAIL = SKEIN_FAIL,
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BAD_HASHLEN = SKEIN_BAD_HASHLEN
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}
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HashReturn;
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typedef size_t DataLength; /* bit count type */
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typedef u08b_t BitSequence; /* bit stream type */
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typedef struct
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{
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uint_t statebits; /* 256, 512, or 1024 */
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union
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{
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Skein_Ctxt_Hdr_t h; /* common header "overlay" */
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Skein_256_Ctxt_t ctx_256;
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Skein_512_Ctxt_t ctx_512;
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Skein1024_Ctxt_t ctx1024;
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} u;
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}
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hashState;
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/* "incremental" hashing API */
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HashReturn Init (hashState *state, int hashbitlen);
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HashReturn Update(hashState *state, const BitSequence *data, DataLength databitlen);
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HashReturn Final (hashState *state, BitSequence *hashval);
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/* "all-in-one" call */
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HashReturn Hash (int hashbitlen, const BitSequence *data,
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DataLength databitlen, BitSequence *hashval);
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/*
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** Re-define the compile-time constants below to change the selection
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** of the Skein state size in the Init() function in SHA3api_ref.c.
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**
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** That is, the NIST API does not allow for explicit selection of the
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** Skein block size, so it must be done implicitly in the Init() function.
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** The selection is controlled by these constants.
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*/
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#ifndef SKEIN_256_NIST_MAX_HASHBITS
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#define SKEIN_256_NIST_MAX_HASHBITS (0)
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#endif
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#ifndef SKEIN_512_NIST_MAX_HASHBITS
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#define SKEIN_512_NIST_MAX_HASHBITS (512)
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#endif
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#endif /* ifdef _AHS_API_H_ */
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