1 /****************************************************************************** 2 * 3 * Copyright 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 * This file contains simple pairing algorithms 21 * 22 ******************************************************************************/ 23 #pragma once 24 25 #include "bt_types.h" 26 27 #define DWORD_BITS 32 28 #define DWORD_BYTES 4 29 #define DWORD_BITS_SHIFT 5 30 31 #define KEY_LENGTH_DWORDS_P256 8 32 /* Arithmetic Operations */ 33 34 int multiprecision_compare(uint32_t* a, uint32_t* b); 35 int multiprecision_iszero(uint32_t* a); 36 void multiprecision_init(uint32_t* c); 37 void multiprecision_copy(uint32_t* c, uint32_t* a); 38 uint32_t multiprecision_dword_bits(uint32_t a); 39 uint32_t multiprecision_most_signdwords(uint32_t* a); 40 uint32_t multiprecision_most_signbits(uint32_t* a); 41 void multiprecision_inv_mod(uint32_t* aminus, uint32_t* a); 42 uint32_t multiprecision_add(uint32_t* c, uint32_t* a, uint32_t* b); // c=a+b 43 void multiprecision_add_mod(uint32_t* c, uint32_t* a, uint32_t* b); 44 uint32_t multiprecision_sub(uint32_t* c, uint32_t* a, uint32_t* b); // c=a-b 45 void multiprecision_sub_mod(uint32_t* c, uint32_t* a, uint32_t* b); 46 void multiprecision_rshift(uint32_t* c, uint32_t* a); // c=a>>1, return carrier 47 void multiprecision_lshift_mod(uint32_t* c, 48 uint32_t* a); // c=a<<b, return carrier 49 uint32_t multiprecision_lshift(uint32_t* c, 50 uint32_t* a); // c=a<<b, return carrier 51 void multiprecision_mult(uint32_t* c, uint32_t* a, uint32_t* b); // c=a*b 52 void multiprecision_mersenns_mult_mod(uint32_t* c, uint32_t* a, uint32_t* b); 53 void multiprecision_mersenns_squa_mod(uint32_t* c, uint32_t* a); 54 uint32_t multiprecision_lshift(uint32_t* c, uint32_t* a); 55 void multiprecision_mult(uint32_t* c, uint32_t* a, uint32_t* b); 56 void multiprecision_fast_mod(uint32_t* c, uint32_t* a); 57 void multiprecision_fast_mod_P256(uint32_t* c, uint32_t* a); 58