/* * Copyright (C) 2016 Intel Corporation. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include "owndefs.h" #include "owncp.h" #include "pcphash.h" #include "pcptool.h" /*F* // Name: ippsMGF_SHA1 // ippsMGF_SHA224 // ippsMGF_SHA256 // ippsMGF_SHA384 // ippsMGF_SHA512 // ippsMGF_MD5 // // Purpose: Mask Generation Functios. // // Returns: Reason: // ippStsNullPtrErr pMask == NULL // ippStsLengthErr seedLen <0 // maskLen <0 // ippStsNotSupportedModeErr if algID is not match to supported hash alg // ippStsNoErr no errors // // Parameters: // pSeed pointer to the input stream // seedLen input stream length (bytes) // pMaske pointer to the ouput mask // maskLen desired length of mask (bytes) // *F*/ IPPFUN(IppStatus, ippsMGF,(const Ipp8u* pSeed, int seedLen, Ipp8u* pMask, int maskLen, IppHashAlgId hashAlg)) { /* get algorithm id */ hashAlg = cpValidHashAlg(hashAlg); /* test hash alg */ IPP_BADARG_RET(ippHashAlg_Unknown==hashAlg, ippStsNotSupportedModeErr); IPP_BAD_PTR1_RET(pMask); IPP_BADARG_RET((seedLen<0)||(maskLen<0), ippStsLengthErr); { /* hash specific */ int hashSize = cpHashSize(hashAlg); int i, outLen; IppsHashState hashCtx; ippsHashInit(&hashCtx, hashAlg); if(!pSeed) seedLen = 0; for(i=0,outLen=0; outLen>24) & 0xFF); cnt[1] = (Ipp8u)((i>>16) & 0xFF); cnt[2] = (Ipp8u)((i>>8) & 0xFF); cnt[3] = (Ipp8u)(i & 0xFF); cpReInitHash(&hashCtx, hashAlg); ippsHashUpdate(pSeed, seedLen, &hashCtx); ippsHashUpdate(cnt, 4, &hashCtx); if((outLen + hashSize) <= maskLen) { ippsHashFinal(pMask+outLen, &hashCtx); outLen += hashSize; } else { Ipp8u md[BITS2WORD8_SIZE(IPP_SHA512_DIGEST_BITSIZE)]; ippsHashFinal(md, &hashCtx); CopyBlock(md, pMask+outLen, maskLen-outLen); outLen = maskLen; } } return ippStsNoErr; } }