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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpecprivatekey.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpecprivatekey.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpecprivatekey.c b/ext/ipp/sources/ippcp/pcpgfpecprivatekey.c new file mode 100644 index 0000000..add30a9 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpecprivatekey.c @@ -0,0 +1,121 @@ +/******************************************************************************* +* Copyright 2016-2018 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. +*******************************************************************************/ + +/* +// Intel(R) Integrated Performance Primitives. Cryptography Primitives. +// +// Context: +// ippsGFpECPrivateKey() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpgfpecstuff.h" + +/*F* +// Name: ippsGFpECPrivateKey +// +// Purpose: Generate random private key +// +// Returns: Reason: +// ippStsNullPtrErr NULL == pEC +// NULL == pPrivate +// +// ippStsContextMatchErr illegal pEC->idCtx +// pEC->subgroup == NULL +// illegal pPrivate->idCtx +// +// ippStsSizeErr BN_ROOM(pPrivate)*BITSIZE(BNU_CHUNK_T)<ECP_ORDBITSIZE(pEC) +// +// ippStsNoErr no errors +// +// Parameters: +// pPrivate pointer to the resultant private key +// pEC pointer to the EC context +// rndFunc Specified Random Generator +// pRndParam Pointer to the Random Generator context +// +*F*/ +IPPFUN(IppStatus, ippsGFpECPrivateKey, (IppsBigNumState* pPrivate, IppsGFpECState* pEC, + IppBitSupplier rndFunc, void* pRndParam)) +{ + IPP_BAD_PTR2_RET(pEC, rndFunc); + + /* use aligned EC context */ + pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); + IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr); + IPP_BADARG_RET(!ECP_SUBGROUP(pEC), ippStsContextMatchErr); + + /* test private key */ + IPP_BAD_PTR1_RET(pPrivate); + pPrivate = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrivate, ALIGN_VAL) ); + IPP_BADARG_RET(!BN_VALID_ID(pPrivate), ippStsContextMatchErr); + IPP_BADARG_RET((BN_ROOM(pPrivate)*BITSIZE(BNU_CHUNK_T)<ECP_ORDBITSIZE(pEC)), ippStsSizeErr); + + { + /* generate random private key X: 0 < X < R */ + BNU_CHUNK_T* pOrder = MOD_MODULUS(ECP_MONT_R(pEC)); + int orderBitLen = ECP_ORDBITSIZE(pEC); + int orderLen = BITS_BNU_CHUNK(orderBitLen); + + BNU_CHUNK_T* pX = BN_NUMBER(pPrivate); + int nsX = BITS_BNU_CHUNK(orderBitLen); + BNU_CHUNK_T xMask = MASK_BNU_CHUNK(orderBitLen); + + IppStatus sts; + do { + sts = rndFunc((Ipp32u*)pX, orderBitLen, pRndParam); + if(ippStsNoErr!=sts) + break; + pX[nsX-1] &= xMask; + } while( (1 == cpEqu_BNU_CHUNK(pX, nsX, 0)) || + (0 <= cpCmp_BNU(pX, nsX, pOrder, orderLen)) ); + + /* set up private */ + if(ippStsNoErr==sts) { + BN_SIGN(pPrivate) = ippBigNumPOS; + FIX_BNU(pX, nsX); + BN_SIZE(pPrivate) = nsX; + } + + return sts; + } +} |