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 #pragma once 25 26 #include "stack/bt_types.h" 27 28 /* Type definitions */ 29 typedef unsigned long DWORD; 30 31 #define DWORD_BITS 32 32 #define DWORD_BYTES 4 33 #define DWORD_BITS_SHIFT 5 34 35 #define KEY_LENGTH_DWORDS_P192 6 36 #define KEY_LENGTH_DWORDS_P256 8 37 /* Arithmetic Operations */ 38 39 int multiprecision_compare(DWORD *a, DWORD *b, uint32_t keyLength); 40 int multiprecision_iszero(DWORD *a, uint32_t keyLength); 41 void multiprecision_init(DWORD *c, uint32_t keyLength); 42 void multiprecision_copy(DWORD *c, DWORD *a, uint32_t keyLength); 43 UINT32 multiprecision_dword_bits (DWORD a); 44 UINT32 multiprecision_most_signdwords(DWORD *a, uint32_t keyLength); 45 UINT32 multiprecision_most_signbits(DWORD *a, uint32_t keyLength); 46 void multiprecision_inv_mod(DWORD *aminus, DWORD *a, uint32_t keyLength); 47 DWORD multiprecision_add(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a+b 48 void multiprecision_add_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); 49 DWORD multiprecision_sub(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a-b 50 void multiprecision_sub_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); 51 void multiprecision_rshift(DWORD *c, DWORD *a, uint32_t keyLength); // c=a>>1, return carrier 52 void multiprecision_lshift_mod(DWORD *c, DWORD *a, uint32_t keyLength); // c=a<<b, return carrier 53 DWORD multiprecision_lshift(DWORD *c, DWORD *a, uint32_t keyLength); // c=a<<b, return carrier 54 void multiprecision_mult(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a*b 55 void multiprecision_mersenns_mult_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); 56 void multiprecision_mersenns_squa_mod(DWORD *c, DWORD *a, uint32_t keyLength); 57 DWORD multiprecision_lshift(DWORD *c, DWORD *a, uint32_t keyLength); 58 void multiprecision_mult(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); 59 void multiprecision_fast_mod(DWORD *c, DWORD *a); 60 void multiprecision_fast_mod_P256(DWORD *c, DWORD *a); 61
