1 /******************************************************************************* 2 * Copyright 2010-2018 Intel Corporation 3 * All Rights Reserved. 4 * 5 * If this software was obtained under the Intel Simplified Software License, 6 * the following terms apply: 7 * 8 * The source code, information and material ("Material") contained herein is 9 * owned by Intel Corporation or its suppliers or licensors, and title to such 10 * Material remains with Intel Corporation or its suppliers or licensors. The 11 * Material contains proprietary information of Intel or its suppliers and 12 * licensors. The Material is protected by worldwide copyright laws and treaty 13 * provisions. No part of the Material may be used, copied, reproduced, 14 * modified, published, uploaded, posted, transmitted, distributed or disclosed 15 * in any way without Intel's prior express written permission. No license under 16 * any patent, copyright or other intellectual property rights in the Material 17 * is granted to or conferred upon you, either expressly, by implication, 18 * inducement, estoppel or otherwise. Any license under such intellectual 19 * property rights must be express and approved by Intel in writing. 20 * 21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this 22 * notice or any other notice embedded in Materials by Intel or Intel's 23 * suppliers or licensors in any way. 24 * 25 * 26 * If this software was obtained under the Apache License, Version 2.0 (the 27 * "License"), the following terms apply: 28 * 29 * You may not use this file except in compliance with the License. You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // 43 // Purpose: 44 // Intel(R) Integrated Performance Primitives. Cryptography Primitives. 45 // Internal EC over GF(p^m) basic Definitions & Function Prototypes 46 // 47 // Context: 48 // gfec_MulBasePoint() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpgfpecstuff.h" 55 #include "gsscramble.h" 56 57 IppsGFpECPoint* gfec_MulBasePoint(IppsGFpECPoint* pR, 58 const BNU_CHUNK_T* pScalar, int scalarLen, 59 IppsGFpECState* pEC, Ipp8u* pScratchBuffer) 60 { 61 FIX_BNU(pScalar, scalarLen); 62 { 63 gsModEngine* pGForder = ECP_MONT_R(pEC); 64 65 BNU_CHUNK_T* pTmpScalar = cpGFpGetPool(1, pGForder); /* length of scalar does not exceed length of order */ 66 int orderBits = MOD_BITSIZE(pGForder); 67 int orderLen = MOD_LEN(pGForder); 68 cpGFpElementCopyPadd(pTmpScalar,orderLen+1, pScalar,scalarLen); 69 70 if(ECP_PREMULBP(pEC)) 71 gfec_base_point_mul(ECP_POINT_X(pR), 72 (Ipp8u*)pTmpScalar, orderBits, 73 pEC); 74 else 75 gfec_point_mul(ECP_POINT_X(pR), ECP_G(pEC), 76 (Ipp8u*)pTmpScalar, orderBits, 77 pEC, pScratchBuffer); 78 cpGFpReleasePool(1, pGForder); 79 80 ECP_POINT_FLAGS(pR) = gfec_IsPointAtInfinity(pR)? 0 : ECP_FINITE_POINT; 81 return pR; 82 } 83 } 84
