1 /******************************************************************************
2  *
3  *  Copyright (C) 2006-2015 Broadcom Corporation
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 /******************************************************************************
20  *
21  *  This file contains simple pairing algorithms
22  *
23  ******************************************************************************/
24 
25 #include <string.h>
26 #include "p_256_ecc_pp.h"
27 
p_256_init_curve(UINT32 keyLength)28 void p_256_init_curve(UINT32 keyLength)
29 {
30     elliptic_curve_t *ec;
31 
32     if (keyLength == KEY_LENGTH_DWORDS_P256) {
33         ec = &curve_p256;
34 
35         ec->p[7] = 0xFFFFFFFF;
36         ec->p[6] = 0x00000001;
37         ec->p[5] = 0x0;
38         ec->p[4] = 0x0;
39         ec->p[3] = 0x0;
40         ec->p[2] = 0xFFFFFFFF;
41         ec->p[1] = 0xFFFFFFFF;
42         ec->p[0] = 0xFFFFFFFF;
43 
44         memset(ec->omega, 0, KEY_LENGTH_DWORDS_P256 * sizeof(ec->omega[0]));
45         memset(ec->a, 0, KEY_LENGTH_DWORDS_P256 * sizeof(ec->a[0]));
46 
47         ec->a_minus3 = TRUE;
48 
49         //b
50         ec->b[7] =  0x5ac635d8;
51         ec->b[6] =  0xaa3a93e7;
52         ec->b[5] =  0xb3ebbd55;
53         ec->b[4] =  0x769886bc;
54         ec->b[3] =  0x651d06b0;
55         ec->b[2] =  0xcc53b0f6;
56         ec->b[1] =  0x3bce3c3e;
57         ec->b[0] =  0x27d2604b;
58 
59         //base point
60         ec->G.x[7] =  0x6b17d1f2;
61         ec->G.x[6] =  0xe12c4247;
62         ec->G.x[5] =  0xf8bce6e5;
63         ec->G.x[4] =  0x63a440f2;
64         ec->G.x[3] =  0x77037d81;
65         ec->G.x[2] =  0x2deb33a0;
66         ec->G.x[1] =  0xf4a13945;
67         ec->G.x[0] =  0xd898c296;
68 
69         ec->G.y[7] =  0x4fe342e2;
70         ec->G.y[6] =  0xfe1a7f9b;
71         ec->G.y[5] =  0x8ee7eb4a;
72         ec->G.y[4] =  0x7c0f9e16;
73         ec->G.y[3] =  0x2bce3357;
74         ec->G.y[2] =  0x6b315ece;
75         ec->G.y[1] =  0xcbb64068;
76         ec->G.y[0] =  0x37bf51f5;
77     }
78 }
79