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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpxinit.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpxinit.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpxinit.c b/ext/ipp/sources/ippcp/pcpgfpxinit.c new file mode 100644 index 0000000..b3ff300 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpxinit.c @@ -0,0 +1,133 @@ +/******************************************************************************* +* 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) ectension. +// +// Context: +// pcpgfpxinit.c() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpgfpstuff.h" +#include "pcpgfpxstuff.h" +#include "pcptool.h" + + + +/*F* +// Name: ippsGFpxInit +// +// Purpose: initializes finite field extension GF(p^d) +// +// Returns: Reason: +// ippStsNullPtrErr NULL == pGFpx +// NULL == pGroundGF +// NULL == ppGroundElm +// NULL == pGFpMethod +// +// ippStsContextMatchErr incorrect pGroundGF's context ID +// incorrect ppGroundElm[i]'s context ID +// +// ippStsOutOfRangeErr size of ppGroundElm[i] does not equal to size of pGroundGF element +// +// ippStsBadArgErr IPP_MIN_GF_EXTDEG > extDeg || extDeg > IPP_MAX_GF_EXTDEG +// (IPP_MIN_GF_EXTDEG==2, IPP_MAX_GF_EXTDEG==8) +// 1>nElm || nElm>extDeg +// +// cpID_Poly!=pGFpMethod->modulusID -- method does not refferenced to polynomial one +// pGFpMethod->modulusBitDeg!=extDeg -- fixed method does not match to degree extension +// +// ippStsNoErr no error +// +// Parameters: +// pGroundGF pointer to the context of the finite field is being extension +// extDeg degree of extension +// ppGroundElm[] pointer to the array of extension field polynomial +// nElm number of coefficients above +// pGFpMethod pointer to the basic arithmetic metods +// pGFpx pointer to Finite Field context is being initialized +*F*/ +IPPFUN(IppStatus, ippsGFpxInit,(const IppsGFpState* pGroundGF, int extDeg, + const IppsGFpElement* const ppGroundElm[], int nElm, + const IppsGFpMethod* pGFpMethod, IppsGFpState* pGFpx)) +{ + IPP_BAD_PTR4_RET(pGFpx, pGroundGF, ppGroundElm, pGFpMethod); + + pGFpx = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFpx, GFP_ALIGNMENT) ); + pGroundGF = (IppsGFpState*)( IPP_ALIGNED_PTR(pGroundGF, GFP_ALIGNMENT) ); + IPP_BADARG_RET( !GFP_TEST_ID(pGroundGF), ippStsContextMatchErr ); + + /* test extension degree */ + IPP_BADARG_RET( extDeg<IPP_MIN_GF_EXTDEG || extDeg>IPP_MAX_GF_EXTDEG, ippStsBadArgErr); + /* coeffs at (x^0), (x^1), ..., (x^(deg-1)) passed acually */ + /* considering normilized f(x), the coeff at (x^deg) is 1 and so could neither stored no passed */ + /* test if 1<=nElm<=extDeg */ + IPP_BADARG_RET( 1>nElm || nElm>extDeg, ippStsBadArgErr); + + /* test if method is polynomial based */ + IPP_BADARG_RET(cpID_Poly != (pGFpMethod->modulusID & cpID_Poly), ippStsBadArgErr); + /* test if method is fixed polynomial based */ + IPP_BADARG_RET(pGFpMethod->modulusBitDeg && (pGFpMethod->modulusBitDeg!=extDeg), ippStsBadArgErr); + + InitGFpxCtx(pGroundGF, extDeg, pGFpMethod, pGFpx); + + { + BNU_CHUNK_T* pPoly = GFP_MODULUS(GFP_PMA(pGFpx)); + int polyTermlen = GFP_FELEN(GFP_PMA(pGroundGF)); + int n; + for(n=0; n<nElm; n++, pPoly+=polyTermlen) { + const IppsGFpElement* pGroundElm = ppGroundElm[n]; + + /* test element */ + IPP_BAD_PTR1_RET(pGroundElm); + IPP_BADARG_RET(!GFPE_TEST_ID(pGroundElm), ippStsContextMatchErr); + IPP_BADARG_RET(GFPE_ROOM(pGroundElm)!=polyTermlen, ippStsOutOfRangeErr); + + /* copy element */ + cpGFpElementCopy(pPoly, GFPE_DATA(pGroundElm), polyTermlen); + } + } + + return ippStsNoErr; +} |