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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
*
******************************************************************************/
#pragma once
#include "bt_types.h"
/* Type definitions */
typedef unsigned long DWORD;
#define DWORD_BITS 32
#define DWORD_BYTES 4
#define DWORD_BITS_SHIFT 5
#define KEY_LENGTH_DWORDS_P192 6
#define KEY_LENGTH_DWORDS_P256 8
/* Arithmetic Operations */
int multiprecision_compare(DWORD *a, DWORD *b, uint32_t keyLength);
int multiprecision_iszero(DWORD *a, uint32_t keyLength);
void multiprecision_init(DWORD *c, uint32_t keyLength);
void multiprecision_copy(DWORD *c, DWORD *a, uint32_t keyLength);
UINT32 multiprecision_dword_bits (DWORD a);
UINT32 multiprecision_most_signdwords(DWORD *a, uint32_t keyLength);
UINT32 multiprecision_most_signbits(DWORD *a, uint32_t keyLength);
void multiprecision_inv_mod(DWORD *aminus, DWORD *a, uint32_t keyLength);
DWORD multiprecision_add(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a+b
void multiprecision_add_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
DWORD multiprecision_sub(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a-b
void multiprecision_sub_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
void multiprecision_rshift(DWORD * c, DWORD * a, uint32_t keyLength); // c=a>>1, return carrier
void multiprecision_lshift_mod(DWORD * c, DWORD * a, uint32_t keyLength); // c=a<<b, return carrier
DWORD multiprecision_lshift(DWORD * c, DWORD * a, uint32_t keyLength); // c=a<<b, return carrier
void multiprecision_mult(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a*b
void multiprecision_mersenns_mult_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
void multiprecision_mersenns_squa_mod(DWORD *c, DWORD *a, uint32_t keyLength);
DWORD multiprecision_lshift(DWORD * c, DWORD * a, uint32_t keyLength);
void multiprecision_mult(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
void multiprecision_fast_mod(DWORD *c, DWORD *a);
void multiprecision_fast_mod_P256(DWORD *c, DWORD *a);
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