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/*############################################################################
# Copyright 2013-2018 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
############################################################################*/
/*
//
// Purpose:
// Cryptography Primitive.
// Fixed window exponentiation scramble/unscramble
//
// Contents:
// gsGetScrambleBufferSize()
// gsScramblePut()
// gsScrambleGet()
// gsScrambleGet_sscm()
//
//
*/
#if !defined(_GS_SCRAMBLE_H)
#define _GS_SCRAMBLE_H
#include "pcpbnuimpl.h"
#define MAX_W (6)
__INLINE unsigned int ct_msb(unsigned int a)
{
return 0 - (a >> (sizeof(a) * 8 - 1));
}
__INLINE unsigned int ct_is_zero(unsigned int a)
{
return ct_msb(~a & (a - 1));
}
__INLINE unsigned int ct_eq(unsigned int a, unsigned int b)
{
return ct_is_zero(a ^ b);
}
__INLINE unsigned int ct_eq_int(int a, int b)
{
return ct_eq((unsigned)(a), (unsigned)(b));
}
#define gsGetScrambleBufferSize OWNAPI(gsGetScrambleBufferSize)
int gsGetScrambleBufferSize(int modulusLen, int w);
#define gsScramblePut OWNAPI(gsScramblePut)
void gsScramblePut(BNU_CHUNK_T* tbl, int idx, const BNU_CHUNK_T* val, int vLen, int w);
#define gsScrambleGet OWNAPI(gsScrambleGet)
void gsScrambleGet(BNU_CHUNK_T* val, int vLen, const BNU_CHUNK_T* tbl, int idx, int w);
#define gsScrambleGet_sscm OWNAPI(gsScrambleGet_sscm)
void gsScrambleGet_sscm(BNU_CHUNK_T* val, int vLen, const BNU_CHUNK_T* tbl, int idx, int w);
#endif /* _GS_SCRAMBLE_H */
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