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/*******************************************************************************
* Copyright 2004-2018 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.
// PRNG Functions
//
// Contents:
// ippsPRNGen()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcphash.h"
#include "pcpprng.h"
#include "pcptool.h"
/*F*
// Name: ippsPRNGen
//
// Purpose: Generates a pseudorandom bit sequence of the specified nBits length.
//
// Returns: Reason:
// ippStsNullPtrErr NULL == pCtx
// NULL == pRand
//
// ippStsContextMatchErr illegal pCtx->idCtx
//
// ippStsLengthErr 1 > nBits
//
// ippStsNoErr no error
//
// Parameters:
// pRand pointer to the buffer
// nBits number of bits be requested
// pCtx pointer to the context
*F*/
IPPFUN(IppStatus, ippsPRNGen,(Ipp32u* pRand, int nBits, void* pCtx))
{
IppsPRNGState* pCtxCtx = (IppsPRNGState*)pCtx;
/* test PRNG context */
IPP_BAD_PTR2_RET(pRand, pCtx);
pCtxCtx = (IppsPRNGState*)( IPP_ALIGNED_PTR(pCtxCtx, PRNG_ALIGNMENT) );
IPP_BADARG_RET(!RAND_VALID_ID(pCtxCtx), ippStsContextMatchErr);
/* test sizes */
IPP_BADARG_RET(nBits< 1, ippStsLengthErr);
{
cpSize rndSize = BITS2WORD32_SIZE(nBits);
Ipp32u rndMask = MAKEMASK32(nBits);
cpPRNGen(pRand, nBits, pCtxCtx);
pRand[rndSize-1] &= rndMask;
return ippStsNoErr;
}
}
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