/******************************************************************************* * Copyright 2010-2018 Intel Corporation * All Rights Reserved. * * If this software was obtained under the Intel Simplified Software License, * the following terms apply: * * The source code, information and material ("Material") contained herein is * owned by Intel Corporation or its suppliers or licensors, and title to such * Material remains with Intel Corporation or its suppliers or licensors. The * Material contains proprietary information of Intel or its suppliers and * licensors. The Material is protected by worldwide copyright laws and treaty * provisions. No part of the Material may be used, copied, reproduced, * modified, published, uploaded, posted, transmitted, distributed or disclosed * in any way without Intel's prior express written permission. No license under * any patent, copyright or other intellectual property rights in the Material * is granted to or conferred upon you, either expressly, by implication, * inducement, estoppel or otherwise. Any license under such intellectual * property rights must be express and approved by Intel in writing. * * Unless otherwise agreed by Intel in writing, you may not remove or alter this * notice or any other notice embedded in Materials by Intel or Intel's * suppliers or licensors in any way. * * * If this software was obtained under the Apache License, Version 2.0 (the * "License"), the following terms apply: * * You may not use this file except in compliance with the License. You may * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 * * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ /* // Intel(R) Integrated Performance Primitives. Cryptography Primitives. // Operations over GF(p). // // Context: // ippsGFpInit // // */ #include "owndefs.h" #include "owncp.h" #include "pcpgfpstuff.h" #include "pcpgfpxstuff.h" #include "pcptool.h" /*F* // Name: ippsGFpInit // // Purpose: initializes prime finite field GF(p) // // Returns: Reason: // ippStsNullPtrErr NULL == pGFpMethod // NULL == pGFp // // ippStsSizeErr !(IPP_MIN_GF_BITSIZE <= primeBitSize <=IPP_MAX_GF_BITSIZE // // ippStsContextMatchErr invalid pPrime->idCtx // // ippStsBadArgErr pGFpMethod != ippsGFpMethod_pXXX() or != ippsGFpMethod_pArb() // prime != pGFpMethod->modulus // prime <0 // bitsize(prime) != primeBitSize // prime IPP_MAX_GF_BITSIZE), ippStsSizeErr); /* use ippsGFpInitFixed() if NULL==pPrimeBN */ if(!pPrimeBN) return ippsGFpInitFixed(primeBitSize, pGFpMethod, pGFp); /* use ippsGFpInitArbitrary() if NULL==pGFpMethod */ if(!pGFpMethod) return ippsGFpInitArbitrary(pPrimeBN, primeBitSize, pGFp); /* test parameters if both pPrimeBN and method are defined */ else { IppStatus sts; /* test input prime */ pPrimeBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrimeBN, BN_ALIGNMENT) ); IPP_BADARG_RET(!BN_VALID_ID(pPrimeBN), ippStsContextMatchErr); IPP_BADARG_RET(BN_SIGN(pPrimeBN)!= IppsBigNumPOS, ippStsBadArgErr); /* prime is negative */ IPP_BADARG_RET(BITSIZE_BNU(BN_NUMBER(pPrimeBN),BN_SIZE(pPrimeBN)) != primeBitSize, ippStsBadArgErr); /* primeBitSize == bitsize(prime) */ IPP_BADARG_RET((BN_SIZE(pPrimeBN)==1) && (BN_NUMBER(pPrimeBN)[0]modulusID & cpID_Prime), ippStsBadArgErr); /* test if size of the prime is matched to method's prime */ IPP_BADARG_RET(pGFpMethod->modulusBitDeg && (primeBitSize!=pGFpMethod->modulusBitDeg), ippStsBadArgErr); /* if method assumes fixed prime value */ if(pGFpMethod->modulus) { int primeLen = BITS_BNU_CHUNK(primeBitSize); IPP_BADARG_RET(cpCmp_BNU(BN_NUMBER(pPrimeBN), primeLen, pGFpMethod->modulus, primeLen), ippStsBadArgErr); } /* init GF */ sts = cpGFpInitGFp(primeBitSize, pGFp); /* set up GF and find quadratic nonresidue */ if(ippStsNoErr==sts) { cpGFpSetGFp(BN_NUMBER(pPrimeBN), primeBitSize, pGFpMethod, pGFp); } return sts; } }