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/*############################################################################
# Copyright 2004-2018 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# 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.
// Big Number Operations
//
// Contents:
// ippsSetOctString_BN()
// ippsGetOctString_BN()
//
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
/*F*
// Name: ippsSetOctString_BN
//
// Purpose: Convert octet string into the BN value.
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pOctStr
// NULL == pBN
//
// ippStsLengthErr 0>strLen
//
// ippStsSizeErr BN_ROOM() is enough for keep actual strLen
//
// ippStsNoErr no errors
//
// Parameters:
// pOctStr pointer to the source octet string
// strLen octet string length
// pBN pointer to the target BN
//
*F*/
IPPFUN(IppStatus, ippsSetOctString_BN,(const Ipp8u* pOctStr, cpSize strLen,
IppsBigNumState* pBN))
{
IPP_BAD_PTR2_RET(pOctStr, pBN);
pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pBN, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pBN), ippStsContextMatchErr);
IPP_BADARG_RET((0>strLen), ippStsLengthErr);
/* remove leading zeros */
while(strLen && (0==pOctStr[0])) {
strLen--;
pOctStr++;
}
/* test BN size */
IPP_BADARG_RET((int)(sizeof(BNU_CHUNK_T)*BN_ROOM(pBN))<strLen, ippStsSizeErr);
if(strLen)
BN_SIZE(pBN) = cpFromOctStr_BNU(BN_NUMBER(pBN), pOctStr, strLen);
else {
BN_NUMBER(pBN)[0] = (BNU_CHUNK_T)0;
BN_SIZE(pBN) = 1;
}
BN_SIGN(pBN) = ippBigNumPOS;
return ippStsNoErr;
}
/*F*
// Name: ippsGetOctString_BN
//
// Purpose: Convert BN value into the octet string.
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pOctStr
// NULL == pBN
//
// ippStsRangeErr BN <0
//
// ippStsLengthErr strLen is enough for keep BN value
//
// ippStsNoErr no errors
//
// Parameters:
// pBN pointer to the source BN
// pOctStr pointer to the target octet string
// strLen octet string length
*F*/
IPPFUN(IppStatus, ippsGetOctString_BN,(Ipp8u* pOctStr, cpSize strLen,
const IppsBigNumState* pBN))
{
IPP_BAD_PTR2_RET(pOctStr, pBN);
pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pBN, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pBN), ippStsContextMatchErr);
IPP_BADARG_RET(BN_NEGATIVE(pBN), ippStsRangeErr);
IPP_BADARG_RET((0>strLen), ippStsLengthErr);
return cpToOctStr_BNU(pOctStr,strLen, BN_NUMBER(pBN),BN_SIZE(pBN))? ippStsNoErr : ippStsLengthErr;
}
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