| /******************************************************************************* |
| * 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. |
| *******************************************************************************/ |
| |
| /* |
| // Intel(R) Integrated Performance Primitives. Cryptography Primitives. |
| // EC over GF(p^m) definitinons |
| // |
| // Context: |
| // ippsGFpECBindGxyTblStd256r1() |
| // |
| */ |
| |
| #include "owndefs.h" |
| #include "owncp.h" |
| #include "pcpgfpecstuff.h" |
| #include "pcpeccp.h" |
| |
| |
| |
| static IppStatus cpGFpECBindGxyTbl(const BNU_CHUNK_T* pPrime, |
| const cpPrecompAP* preComp, |
| IppsGFpECState* 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); |
| |
| { |
| IppsGFpState* pGF = ECP_GFP(pEC); |
| gsModEngine* pGFE = GFP_PMA(pGF); |
| Ipp32u elemLen = GFP_FELEN(pGFE); |
| |
| /* test if GF is prime GF */ |
| IPP_BADARG_RET(!GFP_IS_BASIC(pGFE), ippStsBadArgErr); |
| /* test underlying prime value*/ |
| IPP_BADARG_RET(cpCmp_BNU(pPrime, elemLen, GFP_MODULUS(pGFE), elemLen), ippStsBadArgErr); |
| |
| { |
| BNU_CHUNK_T* pbp_ec = ECP_G(pEC); |
| int cmpFlag; |
| BNU_CHUNK_T* pbp_tbl = cpEcGFpGetPool(1, pEC); |
| |
| selectAP select_affine_point = preComp->select_affine_point; |
| const BNU_CHUNK_T* pTbl = preComp->pTbl; |
| select_affine_point(pbp_tbl, pTbl, 1); |
| |
| /* check if EC's and G-table's Base Point is the same */ |
| cmpFlag = cpCmp_BNU(pbp_ec, elemLen*2, pbp_tbl, elemLen*2); |
| |
| cpEcGFpReleasePool(1, pEC); |
| |
| return cmpFlag? ippStsBadArgErr : ippStsNoErr; |
| } |
| } |
| } |
| |
| /*F* |
| // Name: ippsGFpECBindGxyTblStd256r1 |
| // |
| // Purpose: Enables the use of base point-based pre-computed tables of EC256r1 |
| // |
| // Returns: Reason: |
| // ippStsNullPtrErr NULL == pEC |
| // |
| // ippStsContextMatchErr invalid pEC->idCtx |
| // |
| // ippStsBadArgErr pEC is not EC256r1 |
| // |
| // ippStsNoErr no error |
| // |
| // Parameters: |
| // pEC Pointer to the context of the elliptic curve |
| // |
| *F*/ |
| |
| IPPFUN(IppStatus, ippsGFpECBindGxyTblStd256r1,(IppsGFpECState* pEC)) |
| { |
| IppStatus sts = cpGFpECBindGxyTbl(secp256r1_p, gfpec_precom_nistP256r1_fun(), pEC); |
| |
| /* setup pre-computed g-table and point access function */ |
| if(ippStsNoErr==sts) |
| ECP_PREMULBP(pEC) = gfpec_precom_nistP256r1_fun(); |
| |
| return sts; |
| } |