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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpgetelemoctstr.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpgetelemoctstr.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpgetelemoctstr.c b/ext/ipp/sources/ippcp/pcpgfpgetelemoctstr.c new file mode 100644 index 0000000..b023fdd --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpgetelemoctstr.c @@ -0,0 +1,115 @@ +/******************************************************************************* +* Copyright 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: +// ippsGFpGetElementOctString() +// +*/ +#include "owndefs.h" +#include "owncp.h" + +#include "pcpgfpstuff.h" +#include "pcpgfpxstuff.h" +#include "pcptool.h" + + +/*F* +// Name: ippsGFpGetElementOctString +// +// Purpose: Get GF Element to the octet string +// +// Returns: Reason: +// ippStsNullPtrErr NULL == pGFp +// NULL == pStr +// NULL == pA +// +// ippStsContextMatchErr invalid pGFp->idCtx +// invalid pA->idCtx +// invalid pR->idCtx +// +// ippStsOutOfRangeErr GFPE_ROOM() != GFP_FELEN() +// +// ippStsSizeErr !(0<lenA && lenA>=GFP_FELEN32(pGFE)) +// +// ippStsNoErr no error +// +// Parameters: +// pA Pointer to the context of the finite field element. +// pStr Pointer to the octet string. +// strSize Size of the octet string buffer in bytes. +// pGFp Pointer to the context of the finite field. +// +*F*/ + +IPPFUN(IppStatus, ippsGFpGetElementOctString,(const IppsGFpElement* pA, Ipp8u* pStr, int strSize, IppsGFpState* pGFp)) +{ + IPP_BAD_PTR3_RET(pStr, pA, pGFp); + pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) ); + IPP_BADARG_RET( !GFP_TEST_ID(pGFp), ippStsContextMatchErr ); + IPP_BADARG_RET( !GFPE_TEST_ID(pA), ippStsContextMatchErr ); + IPP_BADARG_RET( 0>=strSize, ippStsSizeErr ); + { + gsModEngine* pGFE = GFP_PMA(pGFp); + IPP_BADARG_RET( GFPE_ROOM(pA)!=GFP_FELEN(pGFE), ippStsOutOfRangeErr); + { + gsModEngine* pBasicGFE = cpGFpBasic(pGFE); + int basicDeg = cpGFpBasicDegreeExtension(pGFE); + int basicElemLen = GFP_FELEN(pBasicGFE); + int basicSize = BITS2WORD8_SIZE(BITSIZE_BNU(GFP_MODULUS(pBasicGFE),GFP_FELEN(pBasicGFE))); + + BNU_CHUNK_T* pDataElm = GFPE_DATA(pA); + int deg, error; + for(deg=0, error=0; deg<basicDeg && !error; deg++) { + int size = IPP_MIN(strSize, basicSize); + error = (NULL == cpGFpGetOctString(pStr, size, pDataElm, pBasicGFE)); + + pDataElm += basicElemLen; + pStr += size; + strSize -= size; + } + + return error ? ippStsSizeErr : ippStsNoErr; + } + } +} |