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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpeccpsetpoint.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpeccpsetpoint.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpeccpsetpoint.c b/ext/ipp/sources/ippcp/pcpeccpsetpoint.c new file mode 100644 index 0000000..5bc4a52 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpeccpsetpoint.c @@ -0,0 +1,133 @@ +/******************************************************************************* +* Copyright 2003-2018 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. +// EC over Prime Finite Field (EC Point operations) +// +// Contents: +// ippsECCPSetPoint() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpeccp.h" + +/*F* +// Name: ippsECCPSetPoint +// +// Purpose: Converts regular affine coordinates EC point (pX,pY) +// into internal presentation - montgomery projective. +// +// Returns: Reason: +// ippStsNullPtrErr NULL == pEC +// NULL == pPoint +// NULL == pX +// NULL == pY +// +// ippStsContextMatchErr illegal pEC->idCtx +// illegal pX->idCtx +// illegal pY->idCtx +// illegal pPoint->idCtx +// +// ippStsOutOfECErr point out-of EC +// +// ippStsNoErr no errors +// +// Parameters: +// pX pointer to the regular affine coordinate X +// pY pointer to the regular affine coordinate Y +// pPoint pointer to the EC Point context +// pEC pointer to the ECCP context +// +// Note: +// if B==0 and (x,y)=(0,y) then point at Infinity will be set up +// if B!=0 and (x,y)=(0,0) then point at Infinity will be set up +// else point with requested coordinates (x,y) wil be set up +// There are no check validation inside! +// +*F*/ +IPPFUN(IppStatus, ippsECCPSetPoint,(const IppsBigNumState* pX, + const IppsBigNumState* pY, + IppsECCPPointState* pPoint, + IppsECCPState* pEC)) +{ + /* test pEC */ + IPP_BAD_PTR1_RET(pEC); + /* use aligned EC context */ + pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); + IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr); + + /* test pX and pY */ + IPP_BAD_PTR2_RET(pX,pY); + pX = (IppsBigNumState*)( IPP_ALIGNED_PTR(pX, ALIGN_VAL) ); + pY = (IppsBigNumState*)( IPP_ALIGNED_PTR(pY, ALIGN_VAL) ); + IPP_BADARG_RET(!BN_VALID_ID(pX), ippStsContextMatchErr); + IPP_BADARG_RET(!BN_VALID_ID(pY), ippStsContextMatchErr); + + { + IppStatus sts; + + IppsGFpState* pGF = ECP_GFP(pEC); + gsModEngine* pGFE = GFP_PMA(pGF); + int elemLen = GFP_FELEN(pGFE); + IppsGFpElement elmX, elmY; + + cpGFpElementConstruct(&elmX, cpGFpGetPool(1, pGFE), elemLen); + cpGFpElementConstruct(&elmY, cpGFpGetPool(1, pGFE), elemLen); + do { + BNU_CHUNK_T* pData = BN_NUMBER(pX); + int ns = BN_SIZE(pX); + sts = ippsGFpSetElement((Ipp32u*)pData, BITS2WORD32_SIZE(BITSIZE_BNU(pData, ns)), &elmX, pGF); + if(ippStsNoErr!=sts) break; + pData = BN_NUMBER(pY); + ns = BN_SIZE(pY); + sts = ippsGFpSetElement((Ipp32u*)pData, BITS2WORD32_SIZE(BITSIZE_BNU(pData, ns)), &elmY, pGF); + if(ippStsNoErr!=sts) break; + sts = ippsGFpECSetPoint(&elmX, &elmY, pPoint, pEC); + } while(0); + + cpGFpReleasePool(2, pGFE); + return sts; + } +} |