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/*******************************************************************************
* Copyright 2010-2018 Intel Corporation
* All Rights Reserved.
*
* If this software was obtained under the Intel Simplified Software License,
* the following terms apply:
*
* The source code, information and material ("Material") contained herein is
* owned by Intel Corporation or its suppliers or licensors, and title to such
* Material remains with Intel Corporation or its suppliers or licensors. The
* Material contains proprietary information of Intel or its suppliers and
* licensors. The Material is protected by worldwide copyright laws and treaty
* provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed or disclosed
* in any way without Intel's prior express written permission. No license under
* any patent, copyright or other intellectual property rights in the Material
* is granted to or conferred upon you, either expressly, by implication,
* inducement, estoppel or otherwise. Any license under such intellectual
* property rights must be express and approved by Intel in writing.
*
* Unless otherwise agreed by Intel in writing, you may not remove or alter this
* notice or any other notice embedded in Materials by Intel or Intel's
* suppliers or licensors in any way.
*
*
* If this software was obtained under the Apache License, Version 2.0 (the
* "License"), the following terms apply:
*
* 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:
// Intel(R) Integrated Performance Primitives. Cryptography Primitives.
// Internal EC over GF(p^m) basic Definitions & Function Prototypes
//
// Context:
// gfec_BasePointProduct()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpgfpecstuff.h"
#include "gsscramble.h"
IppsGFpECPoint* gfec_BasePointProduct(IppsGFpECPoint* pR,
const BNU_CHUNK_T* pScalarG, int scalarGlen,
const IppsGFpECPoint* pP, const BNU_CHUNK_T* pScalarP, int scalarPlen,
IppsGFpECState* pEC, Ipp8u* pScratchBuffer)
{
FIX_BNU(pScalarG, scalarGlen);
FIX_BNU(pScalarP, scalarPlen);
{
gsModEngine* pGForder = ECP_MONT_R(pEC);
int orderBits = MOD_BITSIZE(pGForder);
int orderLen = MOD_LEN(pGForder);
BNU_CHUNK_T* tmpScalarG = cpGFpGetPool(2, pGForder);
BNU_CHUNK_T* tmpScalarP = tmpScalarG+orderLen+1;
cpGFpElementCopyPadd(tmpScalarG, orderLen+1, pScalarG,scalarGlen);
cpGFpElementCopyPadd(tmpScalarP, orderLen+1, pScalarP,scalarPlen);
if(ECP_PREMULBP(pEC)) {
BNU_CHUNK_T* productG = cpEcGFpGetPool(2, pEC);
BNU_CHUNK_T* productP = productG+ECP_POINTLEN(pEC);
gfec_base_point_mul(productG, (Ipp8u*)tmpScalarG, orderBits, pEC);
gfec_point_mul(productP, ECP_POINT_X(pP), (Ipp8u*)tmpScalarP, orderBits, pEC, pScratchBuffer);
gfec_point_add(ECP_POINT_X(pR), productG, productP, pEC);
cpEcGFpReleasePool(2, pEC);
}
else {
gfec_point_prod(ECP_POINT_X(pR),
ECP_G(pEC), (Ipp8u*)tmpScalarG,
ECP_POINT_X(pP), (Ipp8u*)tmpScalarP,
orderBits,
pEC, pScratchBuffer);
}
cpGFpReleasePool(2, pGForder);
}
ECP_POINT_FLAGS(pR) = gfec_IsPointAtInfinity(pR)? 0 : ECP_FINITE_POINT;
return pR;
}
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