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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpprngenhw_bn.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpprngenhw_bn.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpprngenhw_bn.c b/ext/ipp/sources/ippcp/pcpprngenhw_bn.c new file mode 100644 index 0000000..30a5994 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpprngenhw_bn.c @@ -0,0 +1,117 @@ +/******************************************************************************* +* 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: +// ippsPRNGenRDRAND_BN() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpbn.h" +#include "pcptool.h" +#include "pcpprng_genhw.h" + +/*F* +// Name: ippsPRNGenRDRAND_BN +// +// Purpose: Generates a pseudorandom big number +// based on RDRAND instruction of the specified nBits length. +// +// Returns: Reason: +// ippStsNullPtrErr NULL == pBuffer +// +// ippStsLengthErr 1 > nBits +// nBits > BN_ROOM(pRand) +// +// ippStsNotSupportedModeErr unsupported rdrand instruction +// +// ippStsErr random big number can't be generated +// +// ippStsNoErr no error +// +// Parameters: +// pRand pointer to the big number +// nBits number of bits be requested +// pCtx pointer to the context +*F*/ +IPPFUN(IppStatus, ippsPRNGenRDRAND_BN,(IppsBigNumState* pRand, int nBits, void* pCtx)) +{ + /* test random BN */ + IPP_BAD_PTR1_RET(pRand); + pRand = (IppsBigNumState*)( IPP_ALIGNED_PTR(pRand, BN_ALIGNMENT) ); + IPP_BADARG_RET(!BN_VALID_ID(pRand), ippStsContextMatchErr); + + /* test sizes */ + IPP_BADARG_RET(nBits< 1, ippStsLengthErr); + IPP_BADARG_RET(nBits> BN_ROOM(pRand)*BNU_CHUNK_BITS, ippStsLengthErr); + + UNREFERENCED_PARAMETER(pCtx); + + #if ((_IPP>=_IPP_G9) || (_IPP32E>=_IPP32E_E9)) + if( IsFeatureEnabled(ippCPUID_RDRAND) ) { + BNU_CHUNK_T* pRandBN = BN_NUMBER(pRand); + cpSize rndSize = BITS_BNU_CHUNK(nBits); + BNU_CHUNK_T rndMask = MASK_BNU_CHUNK(nBits); + + if(cpRandHW_buffer((Ipp32u*)pRandBN, rndSize*sizeof(BNU_CHUNK_T)/sizeof(Ipp32u))) { + pRandBN[rndSize-1] &= rndMask; + + FIX_BNU(pRandBN, rndSize); + BN_SIZE(pRand) = rndSize; + BN_SIGN(pRand) = ippBigNumPOS; + + return ippStsNoErr; + } + else + return ippStsErr; + } + + /* unsupported rdrand instruction */ + else + #endif + IPP_ERROR_RET(ippStsNotSupportedModeErr); +} |