defender-security / lib / packages / Cose / BigInteger.php

BigInteger.php in Defender Security – Malware Scanner, Login Security & Firewall 6.3.0, at lib/packages/Cose/BigInteger.php

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1	<?php
2
3	declare(strict_types=1);
4
5	/*
6	* The MIT License (MIT)
7	*
8	* Copyright (c) 2014-2021 Spomky-Labs
9	*
10	* This software may be modified and distributed under the terms
11	* of the MIT license. See the LICENSE file for details.
12	*/
13
14	namespace WP_DEFENDER_VENDOR\Cose;
15
16	use Brick\Math\BigInteger as BrickBigInteger;
17	use function chr;
18	use function hex2bin;
19	use InvalidArgumentException;
20	use function unpack;
21
22	/**
23	* @internal
24	*/
25	class BigInteger
26	{
27	/**
28	* Holds the BigInteger's value.
29	*
30	* @var BrickBigInteger
31	*/
32	private $value;
33
34	private function __construct(BrickBigInteger $value)
35	{
36	$this->value = $value;
37	}
38
39	public static function createFromBinaryString(string $value): self
40	{
41	$res = unpack('H*', $value);
42	if (false === $res) {
43	throw new InvalidArgumentException('Unable to convert the data from binary');
44	}
45	$data = current($res);
46
47	return new self(BrickBigInteger::fromBase($data, 16));
48	}
49
50	public static function createFromDecimal(int $value): self
51	{
52	return new self(BrickBigInteger::of($value));
53	}
54
55	/**
56	* Converts a BigInteger to a binary string.
57	*/
58	public function toBytes(): string
59	{
60	if ($this->value->isEqualTo(BrickBigInteger::zero())) {
61	return '';
62	}
63
64	$temp = $this->value->toBase(16);
65	$temp = 0 !== (mb_strlen($temp, '8bit') & 1) ? '0'.$temp : $temp;
66	$temp = hex2bin($temp);
67	if (false === $temp) {
68	throw new InvalidArgumentException('Unable to convert the data into binary');
69	}
70
71	return ltrim($temp, chr(0));
72	}
73
74	/**
75	* Adds two BigIntegers.
76	*
77	* @param BigInteger $y
78	*
79	* @return BigInteger
80	*/
81	public function add(self $y): self
82	{
83	$value = $this->value->plus($y->value);
84
85	return new self($value);
86	}
87
88	/**
89	* Subtracts two BigIntegers.
90	*
91	* @param BigInteger $y
92	*
93	* @return BigInteger
94	*/
95	public function subtract(self $y): self
96	{
97	$value = $this->value->minus($y->value);
98
99	return new self($value);
100	}
101
102	/**
103	* Multiplies two BigIntegers.
104	*
105	* @param BigInteger $x
106	*
107	* @return BigInteger
108	*/
109	public function multiply(self $x): self
110	{
111	$value = $this->value->multipliedBy($x->value);
112
113	return new self($value);
114	}
115
116	/**
117	* Performs modular exponentiation.
118	*
119	* @param BigInteger $e
120	* @param BigInteger $n
121	*
122	* @return BigInteger
123	*/
124	public function modPow(self $e, self $n): self
125	{
126	$value = $this->value->modPow($e->value, $n->value);
127
128	return new self($value);
129	}
130
131	/**
132	* Performs modular exponentiation.
133	*
134	* @param BigInteger $d
135	*
136	* @return BigInteger
137	*/
138	public function mod(self $d): self
139	{
140	$value = $this->value->mod($d->value);
141
142	return new self($value);
143	}
144
145	/**
146	* Compares two numbers.
147	*
148	* @param BigInteger $y
149	*/
150	public function compare(self $y): int
151	{
152	return $this->value->compareTo($y->value);
153	}
154	}
155