1 /******************************************************************************* 2 * Copyright 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 // Intel(R) Integrated Performance Primitives. Cryptography Primitives. 43 // Operations over GF(p). 44 // 45 // Context: 46 // cpGFpSetGFp() 47 // 48 // 49 */ 50 #include "owndefs.h" 51 #include "owncp.h" 52 53 #include "pcpgfpstuff.h" 54 #include "pcpgfpxstuff.h" 55 #include "pcptool.h" 56 57 58 static void cpGFESet(gsModEngine* pGFE, const BNU_CHUNK_T* pPrime, int primeBitSize, const gsModMethod* method) 59 { 60 int primeLen = BITS_BNU_CHUNK(primeBitSize); 61 62 /* arithmetic methods */ 63 GFP_METHOD(pGFE) = method; 64 65 /* store modulus */ 66 COPY_BNU(GFP_MODULUS(pGFE), pPrime, primeLen); 67 68 /* montgomery factor */ 69 GFP_MNT_FACTOR(pGFE) = gsMontFactor(GFP_MODULUS(pGFE)[0]); 70 71 /* montgomery identity (R) */ 72 ZEXPAND_BNU(GFP_MNT_R(pGFE), 0, primeLen); 73 GFP_MNT_R(pGFE)[primeLen] = 1; 74 cpMod_BNU(GFP_MNT_R(pGFE), primeLen+1, GFP_MODULUS(pGFE), primeLen); 75 76 /* montgomery domain converter (RR) */ 77 ZEXPAND_BNU(GFP_MNT_RR(pGFE), 0, primeLen); 78 COPY_BNU(GFP_MNT_RR(pGFE)+primeLen, GFP_MNT_R(pGFE), primeLen); 79 cpMod_BNU(GFP_MNT_RR(pGFE), 2*primeLen, GFP_MODULUS(pGFE), primeLen); 80 81 /* half of modulus */ 82 cpLSR_BNU(GFP_HMODULUS(pGFE), GFP_MODULUS(pGFE), primeLen, 1); 83 84 /* set qnr value */ 85 cpGFEqnr(pGFE); 86 } 87 88 IppStatus cpGFpSetGFp(const BNU_CHUNK_T* pPrime, int primeBitSize, const IppsGFpMethod* method, IppsGFpState* pGF) 89 { 90 cpGFESet(GFP_PMA(pGF), pPrime, primeBitSize, method->arith); 91 return ippStsNoErr; 92 } 93
