1 /*******************************************************************************
2 * Copyright 2010-2018 Intel Corporation
3 * All Rights Reserved.
4 *
5 * If this software was obtained under the Intel Simplified Software License,
6 * the following terms apply:
7 *
8 * The source code, information and material ("Material") contained herein is
9 * owned by Intel Corporation or its suppliers or licensors, and title to such
10 * Material remains with Intel Corporation or its suppliers or licensors. The
11 * Material contains proprietary information of Intel or its suppliers and
12 * licensors. The Material is protected by worldwide copyright laws and treaty
13 * provisions. No part of the Material may be used, copied, reproduced,
14 * modified, published, uploaded, posted, transmitted, distributed or disclosed
15 * in any way without Intel's prior express written permission. No license under
16 * any patent, copyright or other intellectual property rights in the Material
17 * is granted to or conferred upon you, either expressly, by implication,
18 * inducement, estoppel or otherwise. Any license under such intellectual
19 * property rights must be express and approved by Intel in writing.
20 *
21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this
22 * notice or any other notice embedded in Materials by Intel or Intel's
23 * suppliers or licensors in any way.
24 *
25 *
26 * If this software was obtained under the Apache License, Version 2.0 (the
27 * "License"), the following terms apply:
28 *
29 * You may not use this file except in compliance with the License. You may
30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
31 *
32 *
33 * Unless required by applicable law or agreed to in writing, software
34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
36 *
37 * See the License for the specific language governing permissions and
38 * limitations under the License.
39 *******************************************************************************/
40
41 /*
42 // Intel(R) Integrated Performance Primitives. Cryptography Primitives.
43 // EC over GF(p^m) definitinons
44 //
45 // Context:
46 // ippsGFpECBindGxyTblStd256r1()
47 //
48 */
49
50 #include "owndefs.h"
51 #include "owncp.h"
52 #include "pcpgfpecstuff.h"
53 #include "pcpeccp.h"
54
55
56
cpGFpECBindGxyTbl(const BNU_CHUNK_T * pPrime,const cpPrecompAP * preComp,IppsGFpECState * pEC)57 static IppStatus cpGFpECBindGxyTbl(const BNU_CHUNK_T* pPrime,
58 const cpPrecompAP* preComp,
59 IppsGFpECState* pEC)
60 {
61 IPP_BAD_PTR1_RET(pEC);
62 /* use aligned EC context */
63 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) );
64 IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr);
65
66 {
67 IppsGFpState* pGF = ECP_GFP(pEC);
68 gsModEngine* pGFE = GFP_PMA(pGF);
69 Ipp32u elemLen = GFP_FELEN(pGFE);
70
71 /* test if GF is prime GF */
72 IPP_BADARG_RET(!GFP_IS_BASIC(pGFE), ippStsBadArgErr);
73 /* test underlying prime value*/
74 IPP_BADARG_RET(cpCmp_BNU(pPrime, elemLen, GFP_MODULUS(pGFE), elemLen), ippStsBadArgErr);
75
76 {
77 BNU_CHUNK_T* pbp_ec = ECP_G(pEC);
78 int cmpFlag;
79 BNU_CHUNK_T* pbp_tbl = cpEcGFpGetPool(1, pEC);
80
81 selectAP select_affine_point = preComp->select_affine_point;
82 const BNU_CHUNK_T* pTbl = preComp->pTbl;
83 select_affine_point(pbp_tbl, pTbl, 1);
84
85 /* check if EC's and G-table's Base Point is the same */
86 cmpFlag = cpCmp_BNU(pbp_ec, elemLen*2, pbp_tbl, elemLen*2);
87
88 cpEcGFpReleasePool(1, pEC);
89
90 return cmpFlag? ippStsBadArgErr : ippStsNoErr;
91 }
92 }
93 }
94
95 /*F*
96 // Name: ippsGFpECBindGxyTblStd256r1
97 //
98 // Purpose: Enables the use of base point-based pre-computed tables of EC256r1
99 //
100 // Returns: Reason:
101 // ippStsNullPtrErr NULL == pEC
102 //
103 // ippStsContextMatchErr invalid pEC->idCtx
104 //
105 // ippStsBadArgErr pEC is not EC256r1
106 //
107 // ippStsNoErr no error
108 //
109 // Parameters:
110 // pEC Pointer to the context of the elliptic curve
111 //
112 *F*/
113
114 IPPFUN(IppStatus, ippsGFpECBindGxyTblStd256r1,(IppsGFpECState* pEC))
115 {
116 IppStatus sts = cpGFpECBindGxyTbl(secp256r1_p, gfpec_precom_nistP256r1_fun(), pEC);
117
118 /* setup pre-computed g-table and point access function */
119 if(ippStsNoErr==sts)
120 ECP_PREMULBP(pEC) = gfpec_precom_nistP256r1_fun();
121
122 return sts;
123 }
124