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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:
// Intel(R) Integrated Performance Primitives. Cryptography Primitives.
// Internal Unsigned BNU misc functionality
//
// Contents:
// cpFromOctStr_BNU()
//
*/
#include "owncp.h"
#include "pcpbnumisc.h"
/*F*
// Name: cpFromOctStr_BNU
//
// Purpose: Convert Oct String into BNU representation.
//
// Returns:
// size of BNU in BNU_CHUNK_T chunks
//
// Parameters:
// pStr pointer to the source octet string
// strLen octet string length
// pA pointer to the target BN
//
*F*/
cpSize cpFromOctStr_BNU(BNU_CHUNK_T* pA, const Ipp8u* pStr, cpSize strLen)
{
int nsA =0;
/* start from the end of string */
for(; strLen>=(int)sizeof(BNU_CHUNK_T); nsA++,strLen-=(int)(sizeof(BNU_CHUNK_T))) {
/* pack sizeof(BNU_CHUNK_T) bytes into single BNU_CHUNK_T value*/
*pA++ =
#if (BNU_CHUNK_BITS==BNU_CHUNK_64BIT)
+( (BNU_CHUNK_T)pStr[strLen-8]<<(8*7) )
+( (BNU_CHUNK_T)pStr[strLen-7]<<(8*6) )
+( (BNU_CHUNK_T)pStr[strLen-6]<<(8*5) )
+( (BNU_CHUNK_T)pStr[strLen-5]<<(8*4) )
#endif
+( (BNU_CHUNK_T)pStr[strLen-4]<<(8*3) )
+( (BNU_CHUNK_T)pStr[strLen-3]<<(8*2) )
+( (BNU_CHUNK_T)pStr[strLen-2]<<(8*1) )
+ (BNU_CHUNK_T)pStr[strLen-1];
}
/* convert the beginning of the string */
if(strLen) {
BNU_CHUNK_T x = 0;
for(x=0; strLen>0; strLen--) {
BNU_CHUNK_T d = *pStr++;
x = (x<<8) + d;
}
*pA++ = x;
nsA++;
}
return nsA;
}
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