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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpecmulpoint.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpecmulpoint.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpecmulpoint.c b/ext/ipp/sources/ippcp/pcpgfpecmulpoint.c new file mode 100644 index 0000000..9c8993e --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpecmulpoint.c @@ -0,0 +1,123 @@ +/******************************************************************************* +* Copyright 2010-2018 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: +// Intel(R) Integrated Performance Primitives. Cryptography Primitives. +// EC over GF(p) Operations +// +// Context: +// ippsGFpECMulPoint() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpgfpecstuff.h" + +/*F* +// Name: ippsGFpECMulPoint +// +// Purpose: Multiplies a point on an elliptic curve by a scalar +// +// Returns: Reason: +// ippStsNullPtrErr pP == NULL +// pQ == NULL +// pR == NULL +// pEC == NULL +// +// ippStsContextMatchErr invalid pEC->idCtx +// pEC->subgroup == NULL +// invalid pP->idCtx +// invalid pQ->idCtx +// invalid pR->idCtx +// +// ippStsOutOfRangeErr ECP_POINT_FELEN(pP)!=GFP_FELEN() +// ECP_POINT_FELEN(pR)!=GFP_FELEN() +// +// ippStsBadArgErr pN is negative +// pN > MOD_MODULUS(ECP_MONT_R(pEC)) +// +// ippStsNoErr no error +// +// Parameters: +// pP Pointer to the context of the given point on the elliptic curve +// pN Pointer to the Big Number context storing the scalar value +// pR Pointer to the context of the resulting elliptic curve point +// pEC Pointer to the context of the elliptic curve +// pScratchBuffer Pointer to the scratch buffer +// +// Note: +// computes [N]*P, 0 < N < order +// +*F*/ + +IPPFUN(IppStatus, ippsGFpECMulPoint,(const IppsGFpECPoint* pP, + const IppsBigNumState* pN, + IppsGFpECPoint* pR, + IppsGFpECState* pEC, + Ipp8u* pScratchBuffer)) +{ + IPP_BAD_PTR4_RET(pP, pR, pEC, pScratchBuffer); + pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); + IPP_BADARG_RET( !ECP_TEST_ID(pEC), ippStsContextMatchErr ); + IPP_BADARG_RET(!ECP_SUBGROUP(pEC), ippStsContextMatchErr); + + IPP_BADARG_RET( !ECP_POINT_TEST_ID(pP), ippStsContextMatchErr ); + IPP_BADARG_RET( !ECP_POINT_TEST_ID(pR), ippStsContextMatchErr ); + + IPP_BADARG_RET( ECP_POINT_FELEN(pP)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); + IPP_BADARG_RET( ECP_POINT_FELEN(pR)!=GFP_FELEN(GFP_PMA(ECP_GFP(pEC))), ippStsOutOfRangeErr); + + IPP_BAD_PTR1_RET(pN); + pN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pN, BN_ALIGNMENT) ); + IPP_BADARG_RET(!BN_VALID_ID(pN), ippStsContextMatchErr ); + IPP_BADARG_RET( BN_NEGATIVE(pN), ippStsBadArgErr ); + + { + BNU_CHUNK_T* pScalar = BN_NUMBER(pN); + int scalarLen = BN_SIZE(pN); + IPP_BADARG_RET(0<cpCmp_BNU(pScalar, scalarLen, MOD_MODULUS(ECP_MONT_R(pEC)), MOD_LEN(ECP_MONT_R(pEC))), ippStsBadArgErr); + + gfec_MulPoint(pR, pP, pScalar, scalarLen, pEC, pScratchBuffer); + return ippStsNoErr; + } +} |