/******************************************************************************* * 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. // EC over GF(p) Operations // // Context: // ippsGFpECMakePoint() // */ #include "owndefs.h" #include "owncp.h" #include "pcpgfpecstuff.h" #include "pcphash.h" #include "pcphash_rmf.h" /* computes for given x- computes y-coodinates of P(x,y) point belonging EC if existing */ /*F* // Name: ippsGFpECMakePoint // // Purpose: Constructs the coordinates of a point on an elliptic curve based on the X-coordinate // // Returns: Reason: // ippStsNullPtrErr pPoint == NULL // pEC == NULL // pX == NULL // // ippStsContextMatchErr invalid pEC->idCtx // invalid pPoint->idCtx // invalid pX->idCtx // // ippStsBadArgErr !GFP_IS_BASIC(GFP_PMA(ECP_GFP(pEC))) // // ippStsOutOfRangeErr ECP_POINT_FELEN(pPoint)!=GFP_FELEN() // GFPE_ROOM(pX)!=GFP_FELEN() // // ippStsQuadraticNonResidueErr square of the Y-coordinate of // the pPoint is a quadratic non-residue modulo // // // ippStsNoErr no error // // Parameters: // pPoint Pointer to the IppsGFpECPoint context // pEC Pointer to the context of the elliptic curve // pX Pointer to the X-coordinate of the point on the elliptic curve // // Note: // Is not a fact that computed point belongs to BP-related subgroup BP // *F*/ IPPFUN(IppStatus, ippsGFpECMakePoint,(const IppsGFpElement* pX, IppsGFpECPoint* pPoint, IppsGFpECState* pEC)) { IPP_BAD_PTR3_RET(pX, pPoint, pEC); pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); IPP_BADARG_RET( !GFP_IS_BASIC(GFP_PMA(ECP_GFP(pEC))), ippStsBadArgErr ); IPP_BADARG_RET( !GFPE_TEST_ID(pX), ippStsContextMatchErr ); IPP_BADARG_RET( !ECP_POINT_TEST_ID(pPoint), ippStsContextMatchErr ); IPP_BADARG_RET( GFPE_ROOM(pX)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); IPP_BADARG_RET( ECP_POINT_FELEN(pPoint)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); return gfec_MakePoint(pPoint, GFPE_DATA(pX), pEC)? ippStsNoErr : ippStsQuadraticNonResidueErr; }