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 // ippsGFpECTstPoint() 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: ippsGFpECTstPoint 60 // 61 // Purpose: Checks if a point belongs to an elliptic curve 62 // 63 // Returns: Reason: 64 // ippStsNullPtrErr pP == NULL 65 // pEC == NULL 66 // pResult == NULL 67 // 68 // ippStsContextMatchErr invalid pEC->idCtx 69 // invalid pP->idCtx 70 // 71 // ippStsOutOfRangeErr ECP_POINT_FELEN(pP)!=GFP_FELEN() 72 // 73 // ippStsNoErr no error 74 // 75 // Parameters: 76 // pP Pointer to the IppsGFpECPoint context 77 // pEC Pointer to the context of the elliptic curve 78 // pResult Pointer to the result of the check 79 // 80 // Note: 81 // Even if test passed is not a fact that the point belongs to BP-related subgroup BP 82 // 83 *F*/ 84 85 IPPFUN(IppStatus, ippsGFpECTstPoint,(const IppsGFpECPoint* pP, 86 IppECResult* pResult, 87 IppsGFpECState* pEC)) 88 { 89 IPP_BAD_PTR3_RET(pP, pResult, pEC); 90 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 91 IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); 92 IPP_BADARG_RET( !ECP_POINT_TEST_ID(pP), ippStsContextMatchErr ); 93 94 IPP_BADARG_RET( ECP_POINT_FELEN(pP)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); 95 96 if( gfec_IsPointAtInfinity(pP) ) 97 *pResult = ippECPointIsAtInfinite; 98 else if( !gfec_IsPointOnCurve(pP, pEC) ) 99 *pResult = ippECPointIsNotValid; 100 else 101 *pResult = ippECValid; 102 103 return ippStsNoErr; 104 } 105
