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/*******************************************************************************
* Copyright 2002-2018 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.
// SHA512 message digest
//
// Contents:
// ippsSHA512Update()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcphash.h"
#include "pcphash_rmf.h"
#include "pcptool.h"
#include "pcpsha512stuff.h"
/*F*
// Name: ippsSHA512Update
//
// Purpose: Updates intermadiate digest based on input stream.
//
// Returns: Reason:
// ippStsNullPtrErr pSrc == NULL
// pState == NULL
// ippStsContextMatchErr pState->idCtx != idCtxSHA512
// ippStsLengthErr len <0
// ippStsNoErr no errors
//
// Parameters:
// pSrc pointer to the input stream
// len input stream length
// pState pointer to the SHA512 state
//
*F*/
IPPFUN(IppStatus, ippsSHA512Update,(const Ipp8u* pSrc, int len, IppsSHA512State* pState))
{
/* test state pointer and ID */
IPP_BAD_PTR1_RET(pState);
/* use aligned context */
pState = (IppsSHA512State*)( IPP_ALIGNED_PTR(pState, SHA512_ALIGNMENT) );
IPP_BADARG_RET(idCtxSHA512 !=HASH_CTX_ID(pState), ippStsContextMatchErr);
/* test input length */
IPP_BADARG_RET((len<0), ippStsLengthErr);
/* test source pointer */
IPP_BADARG_RET((len && !pSrc), ippStsNullPtrErr);
/*
// handle non empty message
*/
if(len) {
int procLen;
int idx = HAHS_BUFFIDX(pState);
Ipp8u* pBuffer = HASH_BUFF(pState);
Ipp64u lenLo = HASH_LENLO(pState) +len;
Ipp64u lenHi = HASH_LENHI(pState);
if(lenLo < HASH_LENLO(pState)) lenHi++;
/* if non empty internal buffer filling */
if(idx) {
/* copy from input stream to the internal buffer as match as possible */
procLen = IPP_MIN(len, (MBS_SHA512-idx));
CopyBlock(pSrc, pBuffer+idx, procLen);
/* update message pointer and length */
pSrc += procLen;
len -= procLen;
idx += procLen;
/* update digest if buffer full */
if(MBS_SHA512 == idx) {
UpdateSHA512(HASH_VALUE(pState), pBuffer, MBS_SHA512, sha512_cnt);
idx = 0;
}
}
/* main message part processing */
procLen = len & ~(MBS_SHA512-1);
if(procLen) {
UpdateSHA512(HASH_VALUE(pState), pSrc, procLen, sha512_cnt);
pSrc += procLen;
len -= procLen;
}
/* store rest of message into the internal buffer */
if(len) {
CopyBlock(pSrc, pBuffer, len);
idx += len;
}
/* update length of processed message */
HASH_LENLO(pState) = lenLo;
HASH_LENHI(pState) = lenHi;
HAHS_BUFFIDX(pState) = idx;
}
return ippStsNoErr;
}
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