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/*############################################################################
# Copyright 1999-2018 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.
// PRNG Functions
//
// Contents:
// ippsPRNGGetSize()
// ippsPRNGInit()
//
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcpprng.h"
#include "pcphash.h"
#include "pcptool.h"
/*F*
// Name: ippsPRNGGetSize
//
// Purpose: Returns size of PRNG context (bytes).
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pSize
//
// ippStsNoErr no error
//
// Parameters:
// pSize pointer to the size of internal context
*F*/
IPPFUN(IppStatus, ippsPRNGGetSize, (int* pSize))
{
IPP_BAD_PTR1_RET(pSize);
*pSize = sizeof(IppsPRNGState)
+PRNG_ALIGNMENT-1;
return ippStsNoErr;
}
/*F*
// Name: ippsPRNGInit
//
// Purpose: Initializes PRNG context
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pRnd
//
// ippStsLengthErr seedBits < 1
// seedBits < MAX_XKEY_SIZE
// seedBits%8 !=0
//
// ippStsNoErr no error
//
// Parameters:
// seedBits seed bitsize
// pRnd pointer to the context to be initialized
*F*/
IPPFUN(IppStatus, ippsPRNGInit, (int seedBits, IppsPRNGState* pRnd))
{
/* test PRNG context */
IPP_BAD_PTR1_RET(pRnd);
pRnd = (IppsPRNGState*)( IPP_ALIGNED_PTR(pRnd, PRNG_ALIGNMENT) );
/* test sizes */
IPP_BADARG_RET((1>seedBits) || (seedBits>MAX_XKEY_SIZE) ||(seedBits&7), ippStsLengthErr);
{
int hashIvSize = cpHashIvSize(ippHashAlg_SHA1);
const Ipp8u* iv = cpHashIV[ippHashAlg_SHA1];
/* cleanup context */
ZEXPAND_BNU((Ipp8u*)pRnd, 0, (cpSize)(sizeof(IppsPRNGState)));
RAND_ID(pRnd) = idCtxPRNG;
RAND_SEEDBITS(pRnd) = seedBits;
/* default Q parameter */
((Ipp32u*)RAND_Q(pRnd))[0] = 0xFFFFFFFF;
((Ipp32u*)RAND_Q(pRnd))[1] = 0xFFFFFFFF;
((Ipp32u*)RAND_Q(pRnd))[2] = 0xFFFFFFFF;
((Ipp32u*)RAND_Q(pRnd))[3] = 0xFFFFFFFF;
((Ipp32u*)RAND_Q(pRnd))[4] = 0xFFFFFFFF;
/* default T parameter */
CopyBlock(iv, RAND_T(pRnd), hashIvSize);
return ippStsNoErr;
}
}
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