ESP-IDF
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Outline
#include <string.h>
#include "p_256_ecc_pp.h"
p_256_init_curve(UINT32)
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/bt/host/bluedroid/stack/smp/p_256_curvepara.c
 
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/****************************************************************************** * * Copyright (C) 2006-2015 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * 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. * ******************************************************************************//* ... */ /****************************************************************************** * * This file contains simple pairing algorithms * ******************************************************************************//* ... */ #include <string.h> #include "p_256_ecc_pp.h" void p_256_init_curve(UINT32 keyLength) { elliptic_curve_t *ec; if (keyLength == KEY_LENGTH_DWORDS_P256) { ec = &curve_p256; ec->p[7] = 0xFFFFFFFF; ec->p[6] = 0x00000001; ec->p[5] = 0x0; ec->p[4] = 0x0; ec->p[3] = 0x0; ec->p[2] = 0xFFFFFFFF; ec->p[1] = 0xFFFFFFFF; ec->p[0] = 0xFFFFFFFF; memset(ec->omega, 0, KEY_LENGTH_DWORDS_P256 * sizeof(ec->omega[0])); memset(ec->a, 0, KEY_LENGTH_DWORDS_P256 * sizeof(ec->a[0])); ec->a_minus3 = TRUE; //b ec->b[7] = 0x5ac635d8; ec->b[6] = 0xaa3a93e7; ec->b[5] = 0xb3ebbd55; ec->b[4] = 0x769886bc; ec->b[3] = 0x651d06b0; ec->b[2] = 0xcc53b0f6; ec->b[1] = 0x3bce3c3e; ec->b[0] = 0x27d2604b; //base point ec->G.x[7] = 0x6b17d1f2; ec->G.x[6] = 0xe12c4247; ec->G.x[5] = 0xf8bce6e5; ec->G.x[4] = 0x63a440f2; ec->G.x[3] = 0x77037d81; ec->G.x[2] = 0x2deb33a0; ec->G.x[1] = 0xf4a13945; ec->G.x[0] = 0xd898c296; ec->G.y[7] = 0x4fe342e2; ec->G.y[6] = 0xfe1a7f9b; ec->G.y[5] = 0x8ee7eb4a; ec->G.y[4] = 0x7c0f9e16; ec->G.y[3] = 0x2bce3357; ec->G.y[2] = 0x6b315ece; ec->G.y[1] = 0xcbb64068; ec->G.y[0] = 0x37bf51f5; }{...} }{ ... }
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