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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:
// ippsGFpECInitStd521r1()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpgfpecstuff.h"
#include "pcpeccp.h"
static void cpGFpECSetStd(int aLen, const BNU_CHUNK_T* pA,
int bLen, const BNU_CHUNK_T* pB,
int xLen, const BNU_CHUNK_T* pX,
int yLen, const BNU_CHUNK_T* pY,
int rLen, const BNU_CHUNK_T* pR,
BNU_CHUNK_T h,
IppsGFpECState* pEC)
{
IppsGFpState* pGF = ECP_GFP(pEC);
gsModEngine* pGFE = GFP_PMA(pGF);
int elemLen = GFP_FELEN(pGFE);
IppsGFpElement elmA, elmB;
IppsBigNumState R, H;
/* convert A ans B coeffs into GF elements */
cpGFpElementConstruct(&elmA, cpGFpGetPool(1, pGFE), elemLen);
cpGFpElementConstruct(&elmB, cpGFpGetPool(1, pGFE), elemLen);
ippsGFpSetElement((Ipp32u*)pA, BITS2WORD32_SIZE(BITSIZE_BNU(pA,aLen)), &elmA, pGF);
ippsGFpSetElement((Ipp32u*)pB, BITS2WORD32_SIZE(BITSIZE_BNU(pB,bLen)), &elmB, pGF);
/* and set EC */
ippsGFpECSet(&elmA, &elmB, pEC);
/* construct R and H */
cpConstructBN(&R, rLen, (BNU_CHUNK_T*)pR, NULL);
cpConstructBN(&H, 1, &h, NULL);
/* convert GX ans GY coeffs into GF elements */
ippsGFpSetElement((Ipp32u*)pX, BITS2WORD32_SIZE(BITSIZE_BNU(pX,xLen)), &elmA, pGF);
ippsGFpSetElement((Ipp32u*)pY, BITS2WORD32_SIZE(BITSIZE_BNU(pY,yLen)), &elmB, pGF);
/* and init EC subgroup */
ippsGFpECSetSubgroup(&elmA, &elmB, &R, &H, pEC);
}
/*F*
// Name: ippsGFpECInitStd521r1
//
// Purpose: Initializes the context of EC521r1
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pEC
// NULL == pGFp
//
// ippStsContextMatchErr invalid pGFp->idCtx
//
// ippStsBadArgErr pGFp does not specify the finite field over which the given
// standard elliptic curve is defined
//
// ippStsNoErr no error
//
// Parameters:
// pGFp Pointer to the IppsGFpState context of the underlying finite field
// pEC Pointer to the context of the elliptic curve being initialized.
//
*F*/
IPPFUN(IppStatus, ippsGFpECInitStd521r1,(const IppsGFpState* pGF, IppsGFpECState* pEC))
{
IPP_BAD_PTR2_RET(pGF, pEC);
pGF = (IppsGFpState*)( IPP_ALIGNED_PTR(pGF, GFP_ALIGNMENT) );
IPP_BADARG_RET( !GFP_TEST_ID(pGF), ippStsContextMatchErr );
{
gsModEngine* pGFE = GFP_PMA(pGF);
/* test if GF is prime GF */
IPP_BADARG_RET(!GFP_IS_BASIC(pGFE), ippStsBadArgErr);
/* test underlying prime value*/
IPP_BADARG_RET(cpCmp_BNU(secp521r1_p, BITS_BNU_CHUNK(521), GFP_MODULUS(pGFE), BITS_BNU_CHUNK(521)), ippStsBadArgErr);
pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
ippsGFpECInit(pGF, NULL, NULL, pEC);
cpGFpECSetStd(BITS_BNU_CHUNK(521), secp521r1_a,
BITS_BNU_CHUNK(521), secp521r1_b,
BITS_BNU_CHUNK(521), secp521r1_gx,
BITS_BNU_CHUNK(521), secp521r1_gy,
BITS_BNU_CHUNK(521), secp521r1_r,
secp521r1_h,
pEC);
return ippStsNoErr;
}
}
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