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Diffstat (limited to 'ext/ipp/sources/ippcp/gsmod_engineinit.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/gsmod_engineinit.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/gsmod_engineinit.c b/ext/ipp/sources/ippcp/gsmod_engineinit.c new file mode 100644 index 0000000..31860eb --- /dev/null +++ b/ext/ipp/sources/ippcp/gsmod_engineinit.c @@ -0,0 +1,131 @@ +/******************************************************************************* +* Copyright 2017-2018 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. +*******************************************************************************/ + +/* +// +// Purpose: +// Cryptography Primitive. Modular Arithmetic Engine. General Functionality +// +// Contents: +// gsModEngineInit() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpbnumisc.h" +#include "pcpbnuarith.h" +#include "gsmodstuff.h" +#include "pcptool.h" + +/*F* +// Name: gsModEngineInit +// +// Purpose: Initialization of the ModEngine context (Montgomery) +// +// Returns: Reason: +// ippStsLengthErr modulusBitSize < 1 +// numpe < MOD_ENGINE_MIN_POOL_SIZE +// ippStsBadModulusErr (pModulus) && (pModulus[0] & 1) == 0 +// ippStsNoErr no errors +// +// Parameters: +// pME pointer to ModEngine +// pModulus modulus +// numpe length of pool +// modulusBitSize max modulus length (in bits) +// method ModMethod +// +*F*/ + +IppStatus gsModEngineInit(gsModEngine* pME, const Ipp32u* pModulus, int modulusBitSize, int numpe, const gsModMethod* method) +{ + IPP_BADARG_RET(modulusBitSize<1, ippStsLengthErr); + IPP_BADARG_RET((pModulus) && (pModulus[0] & 1) == 0, ippStsBadModulusErr); + IPP_BADARG_RET(numpe<MOD_ENGINE_MIN_POOL_SIZE, ippStsLengthErr); + +/* convert bitsize nbits into the number of BNU_CHUNK_T */ +#define BITS_BNU_IPP32U(nbits) (((nbits)+31)/32) + + { + int pelmLen = BITS_BNU_CHUNK(modulusBitSize); + int modLen = BITS_BNU_CHUNK(modulusBitSize); + int modLen32 = BITS_BNU_IPP32U(modulusBitSize); + Ipp8u* ptr = (Ipp8u*)pME; + + /* clear whole context */ + PaddBlock(0, pME, sizeof(gsModEngine)); + + MOD_PARENT(pME) = NULL; + MOD_EXTDEG(pME) = 1; + MOD_BITSIZE(pME) = modulusBitSize; + MOD_LEN(pME) = modLen; + MOD_PELEN(pME) = pelmLen; + MOD_METHOD(pME) = method; + MOD_MODULUS(pME) = (BNU_CHUNK_T*)(ptr += sizeof(gsModEngine)); + MOD_MNT_R(pME) = (BNU_CHUNK_T*)(ptr += modLen*sizeof(BNU_CHUNK_T)); + MOD_MNT_R2(pME) = (BNU_CHUNK_T*)(ptr += modLen*sizeof(BNU_CHUNK_T)); + MOD_POOL_BUF(pME) = (BNU_CHUNK_T*)(ptr += modLen*sizeof(BNU_CHUNK_T)); + MOD_MAXPOOL(pME) = numpe; + MOD_USEDPOOL(pME) = 0; + + if (pModulus) { + /* store modulus */ + ZEXPAND_COPY_BNU((Ipp32u*)MOD_MODULUS(pME), modLen * (cpSize)(sizeof(BNU_CHUNK_T) / sizeof(Ipp32u)), pModulus, modLen32); + + /* montgomery factor */ + MOD_MNT_FACTOR(pME) = gsMontFactor(MOD_MODULUS(pME)[0]); + + /* montgomery identity (R) */ + ZEXPAND_BNU(MOD_MNT_R(pME), 0, modLen); + MOD_MNT_R(pME)[modLen] = 1; + cpMod_BNU(MOD_MNT_R(pME), modLen+1, MOD_MODULUS(pME), modLen); + + /* montgomery domain converter (RR) */ + ZEXPAND_BNU(MOD_MNT_R2(pME), 0, modLen); + COPY_BNU(MOD_MNT_R2(pME)+modLen, MOD_MNT_R(pME), modLen); + cpMod_BNU(MOD_MNT_R2(pME), 2*modLen, MOD_MODULUS(pME), modLen); + } + } + +#undef BITS_BNU_IPP32U + + return ippStsNoErr; +} |