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/*******************************************************************************
* Copyright 2003-2018 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:
// Cryptography Primitive.
// EC over Prime Finite Field (initialization)
//
// Contents:
// ippsECCPInit()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpeccp.h"
/*F*
// Name: ippsECCPInit
//
// Purpose: Init ECC context.
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pEC
//
// ippStsSizeErr 2>feBitSize
// feBitSize>EC_GFP_MAXBITSIZE
// ippStsNoErr no errors
//
// Parameters:
// feBitSize size of field element (bits)
// pEC pointer to the ECC context
//
*F*/
IPPFUN(IppStatus, ippsECCPInit, (int feBitSize, IppsECCPState* pEC))
{
/* test pEC pointer */
IPP_BAD_PTR1_RET(pEC);
/* use aligned EC context */
pEC = (IppsECCPState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
/* test size of field element */
IPP_BADARG_RET((2>feBitSize || feBitSize>EC_GFP_MAXBITSIZE), ippStsSizeErr);
{
/* size of GF context */
//int gfCtxSize = cpGFpGetSize(feBitSize);
int gfCtxSize = cpGFpGetSize(feBitSize, feBitSize+BITSIZE(BNU_CHUNK_T), GFP_POOL_SIZE);
/* size of EC context */
int ecCtxSize = cpGFpECGetSize(1, feBitSize);
IppsGFpState* pGF = (IppsGFpState*)(IPP_ALIGNED_PTR((Ipp8u*)pEC+ecCtxSize, GFP_ALIGNMENT));
BNU_CHUNK_T* pScratchBuffer = (BNU_CHUNK_T*)IPP_ALIGNED_PTR((Ipp8u*)pGF+gfCtxSize, CACHE_LINE_SIZE);
/* set up contexts */
IppStatus sts;
do {
sts = cpGFpInitGFp(feBitSize, pGF);
if(ippStsNoErr!=sts) break;
sts = ippsGFpECInit(pGF, NULL, NULL, pEC);
} while (0);
/* save scratch buffer pointer */
ECP_SBUFFER(pEC) = pScratchBuffer;
return sts;
}
}
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