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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpprng_gen.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpprng_gen.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpprng_gen.c b/ext/ipp/sources/ippcp/pcpprng_gen.c new file mode 100644 index 0000000..4329b6d --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpprng_gen.c @@ -0,0 +1,171 @@ +/******************************************************************************* +* Copyright 2004-2018 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. +// PRNG Functions +// +// Contents: +// cpPRNGen() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpbn.h" +#include "pcphash.h" +#include "pcpprng.h" +#include "pcptool.h" + + +/* +// G() function based on SHA1 +// +// Parameters: +// T 160 bit parameter +// pHexStr input hex string +// hexStrLen size of hex string (Ipp8u segnments) +// xBNU 160 bit BNU result +// +// Note 1: +// must to be hexStrLen <= 64 (512 bits) +*/ +static +void SHA1_G(Ipp32u* xBNU, const Ipp32u* T, Ipp8u* pHexStr, int hexStrLen) +{ + /* select processing function */ + cpHashProc updateFunc; + #if (_SHA_NI_ENABLING_==_FEATURE_ON_) + updateFunc = UpdateSHA1ni; + #elif (_SHA_NI_ENABLING_==_FEATURE_TICKTOCK_) + updateFunc = IsFeatureEnabled(ippCPUID_SHA)? UpdateSHA1ni : UpdateSHA1; + #else + updateFunc = UpdateSHA1; + #endif + + /* pad HexString zeros */ + PaddBlock(0, pHexStr+hexStrLen, BITS2WORD8_SIZE(MAX_XKEY_SIZE)-hexStrLen); + + /* reset initial HASH value */ + xBNU[0] = T[0]; + xBNU[1] = T[1]; + xBNU[2] = T[2]; + xBNU[3] = T[3]; + xBNU[4] = T[4]; + + /* SHA1 */ + //UpdateSHA1(xBNU, pHexStr, BITS2WORD8_SIZE(MAX_XKEY_SIZE), SHA1_cnt); + updateFunc(xBNU, pHexStr, BITS2WORD8_SIZE(MAX_XKEY_SIZE), SHA1_cnt); + + /* swap back */ + SWAP(xBNU[0],xBNU[4]); + SWAP(xBNU[1],xBNU[3]); +} + +/*F* +// Name: cpPRNGen +// +// Purpose: Returns bitsize of the bitstring has beed added +// +// Returns: +// bitsize of the bitstring has beed added +// +// Parameters: +// pRand pointer to the buffer +// nBits number of bits be requested +// pRnd pointer to the context +*F*/ + +int cpPRNGen(Ipp32u* pRand, cpSize nBits, IppsPRNGState* pRnd) +{ + BNU_CHUNK_T Xj [BITS_BNU_CHUNK(MAX_XKEY_SIZE)]; + BNU_CHUNK_T XVAL[BITS_BNU_CHUNK(MAX_XKEY_SIZE)]; + + Ipp8u TXVAL[BITS2WORD8_SIZE(MAX_XKEY_SIZE)]; + + /* XKEY length in BNU_CHUNK_T */ + cpSize xKeyLen = BITS_BNU_CHUNK(RAND_SEEDBITS(pRnd)); + /* XKEY length in bytes */ + cpSize xKeySize= BITS2WORD8_SIZE(RAND_SEEDBITS(pRnd)); + /* XKEY word's mask */ + BNU_CHUNK_T xKeyMsk = MASK_BNU_CHUNK(RAND_SEEDBITS(pRnd)); + + /* number of Ipp32u chunks to be generated */ + cpSize genlen = BITS2WORD32_SIZE(nBits); + + ZEXPAND_BNU(Xj, 0, BITS_BNU_CHUNK(MAX_XKEY_SIZE)); + ZEXPAND_BNU(XVAL, 0, BITS_BNU_CHUNK(MAX_XKEY_SIZE)); + + while(genlen) { + cpSize len; + + /* Step 1: XVAL=(Xkey+Xseed) mod 2^b */ + BNU_CHUNK_T carry = cpAdd_BNU(XVAL, RAND_XKEY(pRnd), RAND_XAUGMENT(pRnd), xKeyLen); + XVAL[xKeyLen-1] &= xKeyMsk; + + /* Step 2: xj=G(t, XVAL) mod Q */ + cpToOctStr_BNU(TXVAL, xKeySize, XVAL, xKeyLen); + SHA1_G((Ipp32u*)Xj, (Ipp32u*)RAND_T(pRnd), TXVAL, xKeySize); + + { + cpSize sizeXj = BITS_BNU_CHUNK(160); + if(0 <= cpCmp_BNU(Xj, BITS_BNU_CHUNK(IPP_SHA1_DIGEST_BITSIZE), RAND_Q(pRnd),BITS_BNU_CHUNK(IPP_SHA1_DIGEST_BITSIZE)) ) + sizeXj = cpMod_BNU(Xj, BITS_BNU_CHUNK(IPP_SHA1_DIGEST_BITSIZE), RAND_Q(pRnd), BITS_BNU_CHUNK(IPP_SHA1_DIGEST_BITSIZE)); + FIX_BNU(Xj, sizeXj); + ZEXPAND_BNU(Xj, sizeXj, BITS_BNU_CHUNK(MAX_XKEY_SIZE)); + } + + /* Step 3: Xkey=(1+Xkey+Xj) mod 2^b */ + cpInc_BNU(RAND_XKEY(pRnd), RAND_XKEY(pRnd), xKeyLen, 1); + carry = cpAdd_BNU(RAND_XKEY(pRnd), RAND_XKEY(pRnd), Xj, xKeyLen); + RAND_XKEY(pRnd)[xKeyLen-1] &= xKeyMsk; + + /* fill out result */ + len = genlen<BITS2WORD32_SIZE(IPP_SHA1_DIGEST_BITSIZE)? genlen : BITS2WORD32_SIZE(IPP_SHA1_DIGEST_BITSIZE); + COPY_BNU(pRand, (Ipp32u*)Xj, len); + + pRand += len; + genlen -= len; + } + + return nBits; +} |