mirror of
https://github.com/intel/linux-sgx
synced 2026-06-08 14:49:32 +00:00
Angie Chinchilla
9441de4c38
This release is used in conjunction with the linux-sgx-driver Intial release: https://github.com/01org/linux-sgx-driver commit-id: 0e865ce5e6b297a787bcdc12d98bada8174be6d7 Intel-id: 33399 Signed-off-by: Angie Chinchilla <angie.v.chinchilla@intel.com>
126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
/*
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* Copyright (C) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* File:
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* ipp_bn.cpp
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*Description:
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* Wrappers for Big number generation and free functions
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*
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*/
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#include "ipp_wrapper.h"
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#include <stdlib.h>
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#include <string.h>
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#ifndef _TLIBC_CDECL_
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extern "C" int memset_s(void *s, size_t smax, int c, size_t n);
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#endif
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extern "C" IppStatus
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newBN(const Ipp32u *data, int size_in_bytes, IppsBigNumState **p_new_BN)
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{
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IppsBigNumState *pBN=0;
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int bn_size = 0;
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if(p_new_BN == NULL || size_in_bytes <= 0 || size_in_bytes % sizeof(Ipp32u))
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return ippStsBadArgErr;
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/* Get the size of the IppsBigNumState context in bytes */
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IppStatus error_code = ippsBigNumGetSize(size_in_bytes/(int)sizeof(Ipp32u), &bn_size);
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if(error_code != ippStsNoErr)
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{
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*p_new_BN = 0;
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return error_code;
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}
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pBN = (IppsBigNumState *) malloc(bn_size);
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if(!pBN)
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{
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error_code = ippStsMemAllocErr;
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*p_new_BN = 0;
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return error_code;
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}
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/* Initializes context and partitions allocated buffer */
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error_code = ippsBigNumInit(size_in_bytes/(int)sizeof(Ipp32u), pBN);
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if(error_code != ippStsNoErr)
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{
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SAFE_FREE_MM(pBN);
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*p_new_BN = 0;
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return error_code;
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}
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if(data)
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{
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error_code = ippsSet_BN(IppsBigNumPOS, size_in_bytes/(int)sizeof(Ipp32u), data, pBN);
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if(error_code != ippStsNoErr)
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{
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SAFE_FREE_MM(pBN);
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*p_new_BN = 0;
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return error_code;
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}
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}
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*p_new_BN = pBN;
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return error_code;
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}
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extern "C" void secure_free_BN(IppsBigNumState *pBN, int size_in_bytes)
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{
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if(pBN == NULL || size_in_bytes <= 0 || size_in_bytes % sizeof(Ipp32u))
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{
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if(pBN)
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{
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free(pBN);
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}
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return;
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}
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int bn_size = 0;
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/* Get the size of the IppsBigNumState context in bytes
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* Since we have checked the size_in_bytes before and the &bn_size is not NULL,
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* ippsBigNumGetSize never returns failure
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*/
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if(ippsBigNumGetSize(size_in_bytes/(int)sizeof(Ipp32u), &bn_size) != ippStsNoErr)
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{
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free(pBN);
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return;
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}
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/* Clear the buffer before free. */
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memset_s(pBN, bn_size, 0, bn_size);
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free(pBN);
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return;
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}
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