1 /******************************************************************************* 2 * Copyright 2003-2018 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 // Cryptography Primitive. 45 // EC over Prime Finite Field (EC Point operations) 46 // 47 // Contents: 48 // ippsECCPSetPoint() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpeccp.h" 55 56 /*F* 57 // Name: ippsECCPSetPoint 58 // 59 // Purpose: Converts regular affine coordinates EC point (pX,pY) 60 // into internal presentation - montgomery projective. 61 // 62 // Returns: Reason: 63 // ippStsNullPtrErr NULL == pEC 64 // NULL == pPoint 65 // NULL == pX 66 // NULL == pY 67 // 68 // ippStsContextMatchErr illegal pEC->idCtx 69 // illegal pX->idCtx 70 // illegal pY->idCtx 71 // illegal pPoint->idCtx 72 // 73 // ippStsOutOfECErr point out-of EC 74 // 75 // ippStsNoErr no errors 76 // 77 // Parameters: 78 // pX pointer to the regular affine coordinate X 79 // pY pointer to the regular affine coordinate Y 80 // pPoint pointer to the EC Point context 81 // pEC pointer to the ECCP context 82 // 83 // Note: 84 // if B==0 and (x,y)=(0,y) then point at Infinity will be set up 85 // if B!=0 and (x,y)=(0,0) then point at Infinity will be set up 86 // else point with requested coordinates (x,y) wil be set up 87 // There are no check validation inside! 88 // 89 *F*/ 90 IPPFUN(IppStatus, ippsECCPSetPoint,(const IppsBigNumState* pX, 91 const IppsBigNumState* pY, 92 IppsECCPPointState* pPoint, 93 IppsECCPState* pEC)) 94 { 95 /* test pEC */ 96 IPP_BAD_PTR1_RET(pEC); 97 /* use aligned EC context */ 98 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 99 IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr); 100 101 /* test pX and pY */ 102 IPP_BAD_PTR2_RET(pX,pY); 103 pX = (IppsBigNumState*)( IPP_ALIGNED_PTR(pX, ALIGN_VAL) ); 104 pY = (IppsBigNumState*)( IPP_ALIGNED_PTR(pY, ALIGN_VAL) ); 105 IPP_BADARG_RET(!BN_VALID_ID(pX), ippStsContextMatchErr); 106 IPP_BADARG_RET(!BN_VALID_ID(pY), ippStsContextMatchErr); 107 108 { 109 IppStatus sts; 110 111 IppsGFpState* pGF = ECP_GFP(pEC); 112 gsModEngine* pGFE = GFP_PMA(pGF); 113 int elemLen = GFP_FELEN(pGFE); 114 IppsGFpElement elmX, elmY; 115 116 cpGFpElementConstruct(&elmX, cpGFpGetPool(1, pGFE), elemLen); 117 cpGFpElementConstruct(&elmY, cpGFpGetPool(1, pGFE), elemLen); 118 do { 119 BNU_CHUNK_T* pData = BN_NUMBER(pX); 120 int ns = BN_SIZE(pX); 121 sts = ippsGFpSetElement((Ipp32u*)pData, BITS2WORD32_SIZE(BITSIZE_BNU(pData, ns)), &elmX, pGF); 122 if(ippStsNoErr!=sts) break; 123 pData = BN_NUMBER(pY); 124 ns = BN_SIZE(pY); 125 sts = ippsGFpSetElement((Ipp32u*)pData, BITS2WORD32_SIZE(BITSIZE_BNU(pData, ns)), &elmY, pGF); 126 if(ippStsNoErr!=sts) break; 127 sts = ippsGFpECSetPoint(&elmX, &elmY, pPoint, pEC); 128 } while(0); 129 130 cpGFpReleasePool(2, pGFE); 131 return sts; 132 } 133 } 134