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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.
*******************************************************************************/
/*
// Intel(R) Integrated Performance Primitives. Cryptography Primitives.
// EC over GF(p^m) definitinons
//
// Context:
// ippsGFpECBindGxyTblStd521r1()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpgfpecstuff.h"
#include "pcpeccp.h"
static IppStatus cpGFpECBindGxyTbl(const BNU_CHUNK_T* pPrime,
const cpPrecompAP* preComp,
IppsGFpECState* pEC)
{
IPP_BAD_PTR1_RET(pEC);
/* use aligned EC context */
pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr);
{
IppsGFpState* pGF = ECP_GFP(pEC);
gsModEngine* pGFE = GFP_PMA(pGF);
Ipp32u elemLen = GFP_FELEN(pGFE);
/* test if GF is prime GF */
IPP_BADARG_RET(!GFP_IS_BASIC(pGFE), ippStsBadArgErr);
/* test underlying prime value*/
IPP_BADARG_RET(cpCmp_BNU(pPrime, elemLen, GFP_MODULUS(pGFE), elemLen), ippStsBadArgErr);
{
BNU_CHUNK_T* pbp_ec = ECP_G(pEC);
int cmpFlag;
BNU_CHUNK_T* pbp_tbl = cpEcGFpGetPool(1, pEC);
selectAP select_affine_point = preComp->select_affine_point;
const BNU_CHUNK_T* pTbl = preComp->pTbl;
select_affine_point(pbp_tbl, pTbl, 1);
/* check if EC's and G-table's Base Point is the same */
cmpFlag = cpCmp_BNU(pbp_ec, elemLen*2, pbp_tbl, elemLen*2);
cpEcGFpReleasePool(1, pEC);
return cmpFlag? ippStsBadArgErr : ippStsNoErr;
}
}
}
/*F*
// Name: ippsGFpECBindGxyTblStd521r1
//
// Purpose: Enables the use of base point-based pre-computed tables of EC521r1
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pEC
//
// ippStsContextMatchErr invalid pEC->idCtx
//
// ippStsBadArgErr pEC is not EC521r1
//
// ippStsNoErr no error
//
// Parameters:
// pEC Pointer to the context of the elliptic curve
//
*F*/
IPPFUN(IppStatus, ippsGFpECBindGxyTblStd521r1,(IppsGFpECState* pEC))
{
IppStatus sts = cpGFpECBindGxyTbl(secp521r1_p, gfpec_precom_nistP521r1_fun(), pEC);
/* setup pre-computed g-table and point access function */
if(ippStsNoErr==sts)
ECP_PREMULBP(pEC) = gfpec_precom_nistP521r1_fun();
return sts;
}
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