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 // ippsGFpInitArbitrary() 47 // 48 */ 49 #include "owndefs.h" 50 #include "owncp.h" 51 52 #include "pcpgfpstuff.h" 53 #include "pcpgfpxstuff.h" 54 #include "pcptool.h" 55 56 57 /*F* 58 // Name: ippsGFpInitArbitrary 59 // 60 // Purpose: initializes prime finite field GF(p) 61 // 62 // Returns: Reason: 63 // ippStsNullPtrErr NULL == pPrime 64 // NULL == pGFp 65 // 66 // ippStsSizeErr !(IPP_MIN_GF_BITSIZE <= primeBitSize <=IPP_MAX_GF_BITSIZE) 67 // 68 // ippStsContextMatchErr incorrect pPrime context ID 69 // 70 // ippStsBadArgErr prime <0 71 // bitsize(prime) != primeBitSize 72 // prime <IPP_MIN_GF_CHAR 73 // prime is even 74 // 75 // ippStsNoErr no error 76 // 77 // Parameters: 78 // pPrime pointer to the prime context 79 // primeBitSize length of prime in bits 80 // pGFp pointer to Finite Field context is being initialized 81 *F*/ 82 IPPFUN(IppStatus, ippsGFpInitArbitrary,(const IppsBigNumState* pPrime, int primeBitSize, IppsGFpState* pGFp)) 83 { 84 IPP_BAD_PTR1_RET(pGFp); 85 pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) ); 86 87 IPP_BADARG_RET((primeBitSize< IPP_MIN_GF_BITSIZE) || (primeBitSize> IPP_MAX_GF_BITSIZE), ippStsSizeErr); 88 89 IPP_BAD_PTR1_RET(pPrime); 90 pPrime = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrime, BN_ALIGNMENT) ); 91 IPP_BADARG_RET(!BN_VALID_ID(pPrime), ippStsContextMatchErr); 92 IPP_BADARG_RET(BN_SIGN(pPrime)!= IppsBigNumPOS, ippStsBadArgErr); /* prime is negative */ 93 IPP_BADARG_RET(BITSIZE_BNU(BN_NUMBER(pPrime),BN_SIZE(pPrime)) != primeBitSize, ippStsBadArgErr); /* primeBitSize == bitsize(prime) */ 94 IPP_BADARG_RET((BN_SIZE(pPrime)==1) && (BN_NUMBER(pPrime)[0]<IPP_MIN_GF_CHAR), ippStsBadArgErr); /* prime < 3 */ 95 IPP_BADARG_RET(0==(BN_NUMBER(pPrime)[0] & 1), ippStsBadArgErr); /* prime is even */ 96 97 { 98 /* init GF */ 99 IppStatus sts = cpGFpInitGFp(primeBitSize, pGFp); 100 101 /* set up GF engine */ 102 if(ippStsNoErr==sts) { 103 cpGFpSetGFp(BN_NUMBER(pPrime), primeBitSize, ippsGFpMethod_pArb(), pGFp); 104 } 105 106 return sts; 107 } 108 } 109
