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 // EC over GF(p) Operations 46 // 47 // Context: 48 // ippsGFpECMulPoint() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpgfpecstuff.h" 55 56 /*F* 57 // Name: ippsGFpECMulPoint 58 // 59 // Purpose: Multiplies a point on an elliptic curve by a scalar 60 // 61 // Returns: Reason: 62 // ippStsNullPtrErr pP == NULL 63 // pQ == NULL 64 // pR == NULL 65 // pEC == NULL 66 // 67 // ippStsContextMatchErr invalid pEC->idCtx 68 // pEC->subgroup == NULL 69 // invalid pP->idCtx 70 // invalid pQ->idCtx 71 // invalid pR->idCtx 72 // 73 // ippStsOutOfRangeErr ECP_POINT_FELEN(pP)!=GFP_FELEN() 74 // ECP_POINT_FELEN(pR)!=GFP_FELEN() 75 // 76 // ippStsBadArgErr pN is negative 77 // pN > MOD_MODULUS(ECP_MONT_R(pEC)) 78 // 79 // ippStsNoErr no error 80 // 81 // Parameters: 82 // pP Pointer to the context of the given point on the elliptic curve 83 // pN Pointer to the Big Number context storing the scalar value 84 // pR Pointer to the context of the resulting elliptic curve point 85 // pEC Pointer to the context of the elliptic curve 86 // pScratchBuffer Pointer to the scratch buffer 87 // 88 // Note: 89 // computes [N]*P, 0 < N < order 90 // 91 *F*/ 92 93 IPPFUN(IppStatus, ippsGFpECMulPoint,(const IppsGFpECPoint* pP, 94 const IppsBigNumState* pN, 95 IppsGFpECPoint* pR, 96 IppsGFpECState* pEC, 97 Ipp8u* pScratchBuffer)) 98 { 99 IPP_BAD_PTR4_RET(pP, pR, pEC, pScratchBuffer); 100 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 101 IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); 102 IPP_BADARG_RET(!ECP_SUBGROUP(pEC), ippStsContextMatchErr); 103 104 IPP_BADARG_RET( !ECP_POINT_TEST_ID(pP), ippStsContextMatchErr ); 105 IPP_BADARG_RET( !ECP_POINT_TEST_ID(pR), ippStsContextMatchErr ); 106 107 IPP_BADARG_RET( ECP_POINT_FELEN(pP)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); 108 IPP_BADARG_RET( ECP_POINT_FELEN(pR)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); 109 110 IPP_BAD_PTR1_RET(pN); 111 pN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pN, BN_ALIGNMENT) ); 112 IPP_BADARG_RET(!BN_VALID_ID(pN), ippStsContextMatchErr ); 113 IPP_BADARG_RET( BN_NEGATIVE(pN), ippStsBadArgErr ); 114 115 { 116 BNU_CHUNK_T* pScalar = BN_NUMBER(pN); 117 int scalarLen = BN_SIZE(pN); 118 IPP_BADARG_RET(0<cpCmp_BNU(pScalar, scalarLen, MOD_MODULUS(ECP_MONT_R(pEC)), MOD_LEN(ECP_MONT_R(pEC))), ippStsBadArgErr); 119 120 gfec_MulPoint(pR, pP, pScalar, scalarLen, pEC, pScratchBuffer); 121 return ippStsNoErr; 122 } 123 } 124
