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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpmgf1ca_rmf.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpmgf1ca_rmf.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpmgf1ca_rmf.c b/ext/ipp/sources/ippcp/pcpmgf1ca_rmf.c new file mode 100644 index 0000000..30a1d1f --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpmgf1ca_rmf.c @@ -0,0 +1,122 @@ +/******************************************************************************* +* Copyright 2016-2018 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. +// HASH based Mask Generation Functions +// +// Contents: +// ippsMGF1_rmf() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcphash_rmf.h" +#include "pcptool.h" + +/*F* +// Name: ippsMGF1 +// +// Purpose: Mask Generation Functios. +// +// Returns: Reason: +// ippStsNullPtrErr pMask == NULL +// pMethod ==NULL +// ippStsLengthErr seedLen <0 +// maskLen <0 +// 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) +// pMethod hash method +// +// +// Note. +// MGF1 defined in the IEEE P1363 standard. +// MGF1 defined in the ANSI X9.63 standard and frequently called KDF (key Generation Function). +// The fifference between MGF1 and MGF2 is negligible - counter i runs from 0 (in MGF1) and from 1 (in MGF2) +*F*/ +IPPFUN(IppStatus, ippsMGF1_rmf,(const Ipp8u* pSeed, int seedLen, Ipp8u* pMask, int maskLen, const IppsHashMethod* pMethod)) +{ + IPP_BAD_PTR2_RET(pMask, pMethod); + IPP_BADARG_RET((seedLen<0)||(maskLen<0), ippStsLengthErr); + + { + /* hash specific */ + int hashSize = pMethod->hashLen; + + int i, outLen; + + __ALIGN8 IppsHashState_rmf hashCtx; + ippsHashInit_rmf(&hashCtx, pMethod); + + if(!pSeed) + seedLen = 0; + + for(i=0,outLen=0; outLen<maskLen; i++) { /* counter i runs from 0 */ + Ipp8u cnt[4]; + cnt[0] = (Ipp8u)((i>>24) & 0xFF); + cnt[1] = (Ipp8u)((i>>16) & 0xFF); + cnt[2] = (Ipp8u)((i>>8) & 0xFF); + cnt[3] = (Ipp8u)(i & 0xFF); + + ippsHashUpdate_rmf(pSeed, seedLen, &hashCtx); + ippsHashUpdate_rmf(cnt, 4, &hashCtx); + + if((outLen + hashSize) <= maskLen) { + ippsHashFinal_rmf(pMask+outLen, &hashCtx); + outLen += hashSize; + } + else { + Ipp8u md[MAX_HASH_SIZE]; + ippsHashFinal_rmf(md, &hashCtx); + CopyBlock(md, pMask+outLen, maskLen-outLen); + outLen = maskLen; + } + } + + return ippStsNoErr; + } +} |