skeinApi.h

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/*
Copyright (c) 2010-2015 Werner Dittmann

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

*/

#ifndef SKEINAPI_H
#define SKEINAPI_H

#include <crypto/skein.h>

#ifdef _MSC_VER
typedef signed __int8 int8_t;
typedef unsigned __int8 uint8_t;
typedef signed __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef signed __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef signed __int64 int64_t;
typedef unsigned __int64 uint64_t;
#else
#include <stdint.h>
#endif

#ifdef __cplusplus
extern "C"
{
#endif

    typedef enum SkeinSize {
        Skein256 = 256,     
        Skein512 = 512,     
        Skein1024 = 1024    
    } SkeinSize_t;

    typedef struct SkeinCtx {
        u64b_t skeinSize;
        u64b_t  XSave[SKEIN_MAX_STATE_WORDS];   /* save area for state variables */
        union {
            Skein_Ctxt_Hdr_t h;
            Skein_256_Ctxt_t s256;
            Skein_512_Ctxt_t s512;
            Skein1024_Ctxt_t s1024;
        } m;
    } SkeinCtx_t;

    int skeinCtxPrepare(SkeinCtx_t* ctx, SkeinSize_t size);

    int skeinInit(SkeinCtx_t* ctx, size_t hashBitLen);

    void skeinReset(SkeinCtx_t* ctx);
    
    int skeinMacInit(SkeinCtx_t* ctx, const uint8_t *key, size_t keyLen,
                     size_t hashBitLen);

    int skeinUpdate(SkeinCtx_t *ctx, const uint8_t *msg,
                    size_t msgByteCnt);

    int skeinUpdateBits(SkeinCtx_t *ctx, const uint8_t *msg,
                        size_t msgBitCnt);

    int skeinFinal(SkeinCtx_t* ctx, uint8_t* hash);

#ifdef __cplusplus
}
#endif

#endif