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Maurice Ma
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/** @file
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Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#if !defined(_GS_MOD_METHOD_H)
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#define _GS_MOD_METHOD_H
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//#include "owndefs.h"
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#include "owncp.h"
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#include "pcpbnuimpl.h"
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//#include "gsmodstuff.h"
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typedef struct _gsModEngine gsEngine;
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/* modular arith methods */
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typedef BNU_CHUNK_T* (*mod_encode)(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_decode)(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_red) (BNU_CHUNK_T* pR, BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_sqr) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_mul) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_add) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_sub) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, const BNU_CHUNK_T* pB, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_neg) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_div2) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_mul2) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef BNU_CHUNK_T* (*mod_mul3) (BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, gsEngine* pMA);
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typedef struct _gsModMethod {
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mod_encode encode;
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mod_decode decode;
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mod_mul mul;
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mod_sqr sqr;
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mod_red red;
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mod_add add;
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mod_sub sub;
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mod_neg neg;
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mod_div2 div2;
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mod_mul2 mul2;
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mod_mul3 mul3;
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} gsModMethod;
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#if 0 // constant exevution time version
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__INLINE BNU_CHUNK_T cpIsZero(BNU_CHUNK_T x)
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{
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#if (BNU_CHUNK_BITS == BNU_CHUNK_64BIT)
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x |= x>>32;
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#endif
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x |= x>>16;
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x |= x>>8;
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x |= x>>4;
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x |= x>>2;
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x |= x>>1;
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return x&1;
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}
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#endif
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__INLINE BNU_CHUNK_T cpIsZero(BNU_CHUNK_T x)
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{ return x==0; }
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__INLINE BNU_CHUNK_T cpIsNonZero(BNU_CHUNK_T x)
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{ return x!=0; }
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__INLINE BNU_CHUNK_T cpIsOdd(BNU_CHUNK_T x)
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{ return x&1; }
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__INLINE BNU_CHUNK_T cpIsEven(BNU_CHUNK_T x)
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{ return 1-cpIsOdd(x); }
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/* dst[] = (flag)? src[] : dst[] */
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__INLINE void cpMaskMove_gs(BNU_CHUNK_T* dst, const BNU_CHUNK_T* src, int len, BNU_CHUNK_T moveFlag)
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{
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BNU_CHUNK_T srcMask = 0-cpIsNonZero(moveFlag);
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BNU_CHUNK_T dstMask = ~srcMask;
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int n;
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for(n=0; n<len; n++)
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dst[n] = (src[n] & srcMask) ^ (dst[n] & dstMask);
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}
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/* common available pre-defined methos */
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#define gsModMethod OWNAPI(gsModMethod)
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gsModMethod* gsModArith(void);
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/* available pre-defined methos for RSA */
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#define gsModMethodRSA OWNAPI(gsModMethodRSA)
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gsModMethod* gsModArithRSA(void);
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/* available pre-defined methos for ippsMont* */
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#define gsModMethodMont OWNAPI(gsModMethodMont)
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gsModMethod* gsModArithMont(void);
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/* available pre-defined methos for DLP * */
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#define gsModMethodDLP OWNAPI(gsModMethodDLP)
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gsModMethod* gsModArithDLP(void);
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/* available pre-defined common methos for GF over prime * */
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#define gsArithGFpOWNAPI(gsArithGFp)
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gsModMethod* gsArithGFp(void);
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/* ... and etc ... */
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#endif /* _GS_MOD_METHOD_H */
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