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/*******************************************************************************
* Copyright 2015-2018 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:
// HW random generator
//
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcptool.h"
#if !defined (_PCP_PRN_GEN_HW_H)
#define _PCP_PRN_GEN_HW_H
#if ((_IPP>=_IPP_G9) || (_IPP32E>=_IPP32E_E9))
__INLINE int cpRand_hw_sample(BNU_CHUNK_T* pSample)
{
#define LOCAL_COUNTER (8)
int n;
int success = 0;
for(n=0; n<LOCAL_COUNTER && !success; n++)
#if (_IPP_ARCH == _IPP_ARCH_IA32)
success = _rdrand32_step(pSample);
#elif (_IPP_ARCH == _IPP_ARCH_EM64T)
success = _rdrand64_step(pSample);
#else
#error Unknown CPU arch
#endif
return success;
#undef LOCAL_COUNTER
}
#if (_IPP32E>=_IPP32E_E9)
__INLINE int cpRand_hw_sample32(Ipp32u* pSample)
{
#define LOCAL_COUNTER (8)
int n;
int success = 0;
for(n=0; n<LOCAL_COUNTER && !success; n++)
success = _rdrand32_step(pSample);
return success;
#undef LOCAL_COUNTER
}
#endif
/*F*
// Name: cpRandHW_buffer
//
// Purpose: Generates a pseudorandom bit sequence
// based on RDRAND instruction of the specified nBits length.
//
// Returns: Reason:
// 1 no errors
// 0 random bit sequence can't be generated
//
// Parameters:
// pBuffer pointer to the buffer
// bufLen buffer length
*F*/
__INLINE int cpRandHW_buffer(Ipp32u* pBuffer, int bufLen)
{
int nSamples = bufLen/(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u));
int n;
/* collect nSamples randoms */
for(n=0; n<nSamples; n++, pBuffer+=(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u))) {
if( !cpRand_hw_sample((BNU_CHUNK_T*)pBuffer))
return 0;
}
#if (_IPP32E>=_IPP32E_E9)
if( bufLen%(sizeof(BNU_CHUNK_T)/sizeof(Ipp32u)) ) {
if( !cpRand_hw_sample32(pBuffer)) {
return 0;
}
}
#endif
return 1;
}
#endif
#endif /* #if !defined (_PCP_PRN_GEN_HW_H) */
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