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 28 void p_256_init_curve(uint32_t keyLength) { 29 elliptic_curve_t* ec; 30 31 if (keyLength == KEY_LENGTH_DWORDS_P256) { 32 ec = &curve_p256; 33 34 ec->p[7] = 0xFFFFFFFF; 35 ec->p[6] = 0x00000001; 36 ec->p[5] = 0x0; 37 ec->p[4] = 0x0; 38 ec->p[3] = 0x0; 39 ec->p[2] = 0xFFFFFFFF; 40 ec->p[1] = 0xFFFFFFFF; 41 ec->p[0] = 0xFFFFFFFF; 42 43 memset(ec->omega, 0, KEY_LENGTH_DWORDS_P256); 44 memset(ec->a, 0, KEY_LENGTH_DWORDS_P256); 45 46 ec->a_minus3 = true; 47 48 // b 49 ec->b[7] = 0x5ac635d8; 50 ec->b[6] = 0xaa3a93e7; 51 ec->b[5] = 0xb3ebbd55; 52 ec->b[4] = 0x769886bc; 53 ec->b[3] = 0x651d06b0; 54 ec->b[2] = 0xcc53b0f6; 55 ec->b[1] = 0x3bce3c3e; 56 ec->b[0] = 0x27d2604b; 57 58 // base point 59 ec->G.x[7] = 0x6b17d1f2; 60 ec->G.x[6] = 0xe12c4247; 61 ec->G.x[5] = 0xf8bce6e5; 62 ec->G.x[4] = 0x63a440f2; 63 ec->G.x[3] = 0x77037d81; 64 ec->G.x[2] = 0x2deb33a0; 65 ec->G.x[1] = 0xf4a13945; 66 ec->G.x[0] = 0xd898c296; 67 68 ec->G.y[7] = 0x4fe342e2; 69 ec->G.y[6] = 0xfe1a7f9b; 70 ec->G.y[5] = 0x8ee7eb4a; 71 ec->G.y[4] = 0x7c0f9e16; 72 ec->G.y[3] = 0x2bce3357; 73 ec->G.y[2] = 0x6b315ece; 74 ec->G.y[1] = 0xcbb64068; 75 ec->G.y[0] = 0x37bf51f5; 76 } 77 } 78
