components/bt/host/bluedroid/stack/smp/include/p_256_ecc_pp.h (ESP-IDF)

/****************************************************************************** * * 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 using Elliptic Curve Cryptography for private public key * ******************************************************************************/ #pragma once #include "p_256_multprecision.h" #include "common/bt_target.h" typedef unsigned long DWORD; typedef struct { DWORD x[KEY_LENGTH_DWORDS_P256]; DWORD y[KEY_LENGTH_DWORDS_P256]; DWORD z[KEY_LENGTH_DWORDS_P256]; } Point; typedef struct { // curve's coefficients DWORD a[KEY_LENGTH_DWORDS_P256]; DWORD b[KEY_LENGTH_DWORDS_P256]; //whether a is -3 int a_minus3; // prime modulus DWORD p[KEY_LENGTH_DWORDS_P256]; // Omega, p = 2^m -omega DWORD omega[KEY_LENGTH_DWORDS_P256]; // base point, a point on E of order r Point G; } elliptic_curve_t; #if SMP_DYNAMIC_MEMORY == FALSE extern elliptic_curve_t curve; extern elliptic_curve_t curve_p256; #else extern elliptic_curve_t *curve_ptr; extern elliptic_curve_t *curve_p256_ptr; #define curve (*curve_ptr) #define curve_p256 (*curve_p256_ptr) #endif void ECC_PointMult_Bin_NAF(Point *q, Point *p, DWORD *n, uint32_t keyLength); bool ECC_CheckPointIsInElliCur_P256(Point *p); #define ECC_PointMult(q, p, n, keyLength) ECC_PointMult_Bin_NAF(q, p, n, keyLength) void p_256_init_curve(UINT32 keyLength);