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/*############################################################################
# Copyright 2002-2018 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.
############################################################################*/
/*
// Intel(R) Integrated Performance Primitives
// Cryptographic Primitives (ippcp)
//
//
//
*/
#if !defined(_CP_BN_H)
#define _CP_BN_H
#include "pcpbnuimpl.h"
#include "pcpbnuarith.h"
#include "pcpbnumisc.h"
#include "pcpbnu32arith.h"
#include "pcpbnu32misc.h"
/*
// Big Number context
*/
struct _cpBigNum
{
IppCtxId idCtx; /* BigNum ctx id */
IppsBigNumSGN sgn; /* sign */
cpSize size; /* BigNum size (BNU_CHUNK_T) */
cpSize room; /* BigNum max size (BNU_CHUNK_T) */
BNU_CHUNK_T* number; /* BigNum value */
BNU_CHUNK_T* buffer; /* temporary buffer */
};
/* BN accessory macros */
#define BN_ID(pBN) ((pBN)->idCtx)
#define BN_SIGN(pBN) ((pBN)->sgn)
#define BN_POSITIVE(pBN) (BN_SIGN(pBN)==ippBigNumPOS)
#define BN_NEGATIVE(pBN) (BN_SIGN(pBN)==ippBigNumNEG)
#define BN_NUMBER(pBN) ((pBN)->number)
#define BN_BUFFER(pBN) ((pBN)->buffer)
#define BN_ROOM(pBN) ((pBN)->room)
#define BN_SIZE(pBN) ((pBN)->size)
#define BN_SIZE32(pBN) ((pBN)->size*(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u)))
//#define BN_SIZE32(pBN) (BITS2WORD32_SIZE( BITSIZE_BNU(BN_NUMBER((pBN)),BN_SIZE((pBN)))))
#define BN_VALID_ID(pBN) (BN_ID((pBN))==idCtxBigNum)
#define INVERSE_SIGN(s) (((s)==ippBigNumPOS)? ippBigNumNEG : ippBigNumPOS)
#define BN_ALIGNMENT ((int)sizeof(void*))
/* pack-unpack context */
#define cpPackBigNumCtx OWNAPI(cpPackBigNumCtx)
void cpPackBigNumCtx(const IppsBigNumState* pBN, Ipp8u* pBuffer);
#define cpUnpackBigNumCtx OWNAPI(cpUnpackBigNumCtx)
void cpUnpackBigNumCtx(const Ipp8u* pBuffer, IppsBigNumState* pBN);
/* copy BN */
__INLINE IppsBigNumState* cpBN_copy(IppsBigNumState* pDst, const IppsBigNumState* pSrc)
{
BN_SIGN(pDst) = BN_SIGN(pSrc);
BN_SIZE(pDst) = BN_SIZE(pSrc);
ZEXPAND_COPY_BNU(BN_NUMBER(pDst), BN_ROOM(pDst), BN_NUMBER(pSrc), BN_SIZE(pSrc));
return pDst;
}
/* set BN to zero */
__INLINE IppsBigNumState* cpBN_zero(IppsBigNumState* pBN)
{
BN_SIGN(pBN) = ippBigNumPOS;
BN_SIZE(pBN) = 1;
ZEXPAND_BNU(BN_NUMBER(pBN),0, (int)BN_ROOM(pBN));
return pBN;
}
/* fixup BN */
__INLINE IppsBigNumState* cpBN_fix(IppsBigNumState* pBN)
{
cpSize len = BN_SIZE(pBN);
FIX_BNU(BN_NUMBER(pBN), len);
BN_SIZE(pBN) = len;
return pBN;
}
/* set BN to chunk */
__INLINE IppsBigNumState* cpBN_chunk(IppsBigNumState* pBN, BNU_CHUNK_T a)
{
BN_SIGN(pBN) = ippBigNumPOS;
BN_SIZE(pBN) = 1;
ZEXPAND_BNU(BN_NUMBER(pBN),0, (int)BN_ROOM(pBN));
BN_NUMBER(pBN)[0] = a;
return pBN;
}
/* set BN to 2^m */
__INLINE IppsBigNumState* cpBN_power2(IppsBigNumState* pBN, int power)
{
cpSize size = BITS_BNU_CHUNK(power+1);
if(BN_ROOM(pBN) >= size) {
BN_SIGN(pBN) = ippBigNumPOS;
BN_SIZE(pBN) = size;
ZEXPAND_BNU(BN_NUMBER(pBN),0, BN_ROOM(pBN));
SET_BIT(BN_NUMBER(pBN), power);
return pBN;
}
else return NULL;
}
/* bitsize of BN */
__INLINE int cpBN_bitsize(const IppsBigNumState* pA)
{
int bitsize = BITSIZE_BNU(BN_NUMBER(pA), BN_SIZE(pA));
return bitsize;
}
/* returns -1/0/+1 depemding on A~B comparison */
__INLINE int cpBN_cmp(const IppsBigNumState* pA, const IppsBigNumState* pB)
{
IppsBigNumSGN signA = BN_SIGN(pA);
IppsBigNumSGN signB = BN_SIGN(pB);
if(signA==signB) {
int result = cpCmp_BNU(BN_NUMBER(pA), BN_SIZE(pA), BN_NUMBER(pB), BN_SIZE(pB));
return (ippBigNumPOS==signA)? result : -result;
}
return (ippBigNumPOS==signA)? 1 : -1;
}
/* returns -1/0/+1 depemding on A comparison 0</==0/>0 */
__INLINE int cpBN_tst(const IppsBigNumState* pA)
{
if(1==BN_SIZE(pA) && 0==BN_NUMBER(pA)[0])
return 0;
else
return BN_POSITIVE(pA)? 1 : -1;
}
// some addtition functions
__INLINE int IsZero_BN(const IppsBigNumState* pA)
{
return ( BN_SIZE(pA)==1 ) && ( BN_NUMBER(pA)[0]==0 );
}
__INLINE int IsOdd_BN(const IppsBigNumState* pA)
{
return BN_NUMBER(pA)[0] & 1;
}
__INLINE IppsBigNumState* BN_Word(IppsBigNumState* pBN, BNU_CHUNK_T w)
{
BN_SIGN(pBN) = ippBigNumPOS;
BN_SIZE(pBN) = 1;
ZEXPAND_BNU(BN_NUMBER(pBN),0, BN_ROOM(pBN));
BN_NUMBER(pBN)[0] = w;
return pBN;
}
__INLINE IppsBigNumState* BN_Set(const BNU_CHUNK_T* pData, cpSize len, IppsBigNumState* pBN)
{
BN_SIGN(pBN) = ippBigNumPOS;
BN_SIZE(pBN) = len;
ZEXPAND_COPY_BNU(BN_NUMBER(pBN), BN_ROOM(pBN), pData, len);
return pBN;
}
__INLINE IppsBigNumState* BN_Make(BNU_CHUNK_T* pData, BNU_CHUNK_T* pBuffer, cpSize len, IppsBigNumState* pBN)
{
BN_ID(pBN) = idCtxBigNum;
BN_SIGN(pBN) = ippBigNumPOS;
BN_SIZE(pBN) = 1;
BN_ROOM(pBN) = len;
BN_NUMBER(pBN) = pData;
BN_BUFFER(pBN) = pBuffer;
return pBN;
}
/*
// fixed single chunk BN
*/
typedef struct _ippcpBigNumChunk {
IppsBigNumState bn;
BNU_CHUNK_T value;
BNU_CHUNK_T temporary;
} IppsBigNumStateChunk;
/* reference to BN(1) and BN(2) */
#define cpBN_OneRef OWNAPI(cpBN_OneRef)
IppsBigNumState* cpBN_OneRef(void);
#define cpBN_TwoRef OWNAPI(cpBN_TwoRef)
IppsBigNumState* cpBN_TwoRef(void);
#define cpBN_ThreeRef OWNAPI(cpBN_ThreeRef)
IppsBigNumState* cpBN_ThreeRef(void);
#define BN_ONE_REF() cpBN_OneRef()
#define BN_TWO_REF() cpBN_TwoRef()
#define BN_THREE_REF() cpBN_ThreeRef()
#endif /* _CP_BN_H */
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