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 "bt_types.h"
27
28/* Type definitions */
29typedef 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
39int multiprecision_compare(DWORD *a, DWORD *b, uint32_t keyLength);
40int multiprecision_iszero(DWORD *a, uint32_t keyLength);
41void multiprecision_init(DWORD *c, uint32_t keyLength);
42void multiprecision_copy(DWORD *c, DWORD *a, uint32_t keyLength);
43UINT32 multiprecision_dword_bits (DWORD a);
44UINT32 multiprecision_most_signdwords(DWORD *a, uint32_t keyLength);
45UINT32 multiprecision_most_signbits(DWORD *a, uint32_t keyLength);
46void multiprecision_inv_mod(DWORD *aminus, DWORD *a, uint32_t keyLength);
47DWORD multiprecision_add(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a+b
48void multiprecision_add_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
49DWORD multiprecision_sub(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a-b
50void multiprecision_sub_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
51void multiprecision_rshift(DWORD * c, DWORD * a, uint32_t keyLength);  // c=a>>1, return carrier
52void multiprecision_lshift_mod(DWORD * c, DWORD * a, uint32_t keyLength); // c=a<<b, return carrier
53DWORD multiprecision_lshift(DWORD * c, DWORD * a, uint32_t keyLength);  // c=a<<b, return carrier
54void multiprecision_mult(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength); // c=a*b
55void multiprecision_mersenns_mult_mod(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
56void multiprecision_mersenns_squa_mod(DWORD *c, DWORD *a, uint32_t keyLength);
57DWORD multiprecision_lshift(DWORD * c, DWORD * a, uint32_t keyLength);
58void multiprecision_mult(DWORD *c, DWORD *a, DWORD *b, uint32_t keyLength);
59void multiprecision_fast_mod(DWORD *c, DWORD *a);
60void multiprecision_fast_mod_P256(DWORD *c, DWORD *a);
61
62
63