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/*############################################################################
# Copyright 1999-2018 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.
// EC (prime) Point
//
// Contents:
// ippsECCPPointGetSize()
// ippsECCPPointInit()
//
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpeccp.h"
/*F*
// Name: ippsECCPPointGetSize
//
// Purpose: Returns size of EC Point context (bytes).
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pSzie
// ippStsSizeErr 2>feBitSize
// ippStsNoErr no errors
//
// Parameters:
// feBitSize size of field element (bits)
// pSize pointer to the size of EC Point context
//
*F*/
IPPFUN(IppStatus, ippsECCPPointGetSize, (int feBitSize, int* pSize))
{
/* test size's pointer */
IPP_BAD_PTR1_RET(pSize);
/* test size of field element */
IPP_BADARG_RET((2>feBitSize), ippStsSizeErr);
{
int elemLen = BITS_BNU_CHUNK(feBitSize);
*pSize= sizeof(IppsGFpECPoint)
+elemLen*sizeof(BNU_CHUNK_T) /* X */
+elemLen*sizeof(BNU_CHUNK_T) /* Y */
+elemLen*sizeof(BNU_CHUNK_T);/* Z */
}
return ippStsNoErr;
}
/*F*
// Name: ippsECCPPointInit
//
// Purpose: Init EC Point context.
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pPoint
// ippStsSizeErr 2>feBitSize
// ippStsNoErr no errors
//
// Parameters:
// feBitSize size of field element (bits)
// pECC pointer to ECC context
//
*F*/
IPPFUN(IppStatus, ippsECCPPointInit, (int feBitSize, IppsECCPPointState* pPoint))
{
/* test pEC pointer */
IPP_BAD_PTR1_RET(pPoint);
/* test size of field element */
IPP_BADARG_RET((2>feBitSize), ippStsSizeErr);
{
int elemLen = BITS_BNU_CHUNK(feBitSize);
Ipp8u* ptr = (Ipp8u*)pPoint;
ECP_POINT_ID(pPoint) = idCtxGFPPoint;
ECP_POINT_FLAGS(pPoint) = 0;
ECP_POINT_FELEN(pPoint) = elemLen;
ptr += sizeof(IppsGFpECPoint);
ECP_POINT_DATA(pPoint) = (BNU_CHUNK_T*)(ptr);
gfec_SetPointAtInfinity(pPoint);
return ippStsNoErr;
}
}
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