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 // ippsGFpECGetPointRegular() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpgfpecstuff.h" 55 #include "pcphash.h" 56 #include "pcphash_rmf.h" 57 58 /*F* 59 // Name: ippsGFpECGetPointRegular 60 // 61 // Purpose: Retrieves coordinates of a point on an elliptic curve in the regular domain 62 // 63 // Returns: Reason: 64 // ippStsNullPtrErr pPoint == NULL 65 // pEC == NULL 66 // 67 // 68 // ippStsContextMatchErr invalid pEC->idCtx 69 // invalid pPoint->idCtx 70 // invalid pX->idCtx 71 // invalid pY->idCtx 72 // 73 // ippStsOutOfRangeErr ECP_POINT_FELEN(pPoint)!=GFP_FELEN() 74 // BN_ROOM(pX)*BNU_CHUNK_BITS<GFP_FEBITLEN(pGFE)) 75 // BN_ROOM(pY)*BNU_CHUNK_BITS<GFP_FEBITLEN(pGFE)) 76 // 77 // ippStsNoErr no error 78 // 79 // Parameters: 80 // pPoint Pointer to the IppsGFpECPoint context 81 // pEC Pointer to the context of the elliptic curve 82 // pX, pY Pointers to the X and Y coordinates of a point on the elliptic curve 83 // 84 *F*/ 85 86 IPPFUN(IppStatus, ippsGFpECGetPointRegular,(const IppsGFpECPoint* pPoint, 87 IppsBigNumState* pX, IppsBigNumState* pY, 88 IppsGFpECState* pEC)) 89 { 90 IppsGFpState* pGF; 91 gsModEngine* pGFE; 92 93 IPP_BAD_PTR2_RET(pPoint, pEC); 94 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 95 IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); 96 IPP_BADARG_RET( !ECP_POINT_TEST_ID(pPoint), ippStsContextMatchErr ); 97 98 pGF = ECP_GFP(pEC); 99 pGFE = GFP_PMA(pGF); 100 101 if(pX) { 102 pX = (IppsBigNumState*)( IPP_ALIGNED_PTR(pX, BN_ALIGNMENT) ); 103 IPP_BADARG_RET(!BN_VALID_ID(pX), ippStsContextMatchErr ); 104 IPP_BADARG_RET(BN_ROOM(pX)*BNU_CHUNK_BITS<GFP_FEBITLEN(pGFE), ippStsOutOfRangeErr); 105 } 106 if(pY) { 107 pY = (IppsBigNumState*)( IPP_ALIGNED_PTR(pY, BN_ALIGNMENT) ); 108 IPP_BADARG_RET(!BN_VALID_ID(pY), ippStsContextMatchErr ); 109 IPP_BADARG_RET(BN_ROOM(pY)*BNU_CHUNK_BITS<GFP_FEBITLEN(pGFE), ippStsOutOfRangeErr); 110 } 111 112 { 113 int elmLen = GFP_FELEN(pGFE); 114 BNU_CHUNK_T* x = cpGFpGetPool(2, pGFE); 115 BNU_CHUNK_T* y = x + elmLen; 116 117 /* returns (X,Y) == (0,0) if Point is at infinity */ 118 gfec_GetPoint((pX)? x:NULL, (pY)? y:NULL, pPoint, pEC); 119 120 /* convert into refular domain */ 121 if(pX) { 122 GFP_METHOD(pGFE)->decode(x, x, pGFE); 123 ippsSet_BN(ippBigNumPOS, GFP_FELEN32(pGFE), (Ipp32u*)x, pX); 124 } 125 if(pY) { 126 GFP_METHOD(pGFE)->decode(y, y, pGFE); 127 ippsSet_BN(ippBigNumPOS, GFP_FELEN32(pGFE), (Ipp32u*)y, pY); 128 } 129 130 cpGFpReleasePool(2, pGFE); 131 return ippStsNoErr; 132 } 133 } 134