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admin/phpMyAdmin/vendor/web-auth/cose-lib/src/BigInteger.php

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+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2021 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace Cose;
+
+use Brick\Math\BigInteger as BrickBigInteger;
+use function chr;
+use function hex2bin;
+use InvalidArgumentException;
+use function unpack;
+
+/**
+ * @internal
+ */
+class BigInteger
+{
+    /**
+     * Holds the BigInteger's value.
+     *
+     * @var BrickBigInteger
+     */
+    private $value;
+
+    private function __construct(BrickBigInteger $value)
+    {
+        $this->value = $value;
+    }
+
+    public static function createFromBinaryString(string $value): self
+    {
+        $res = unpack('H*', $value);
+        if (false === $res) {
+            throw new InvalidArgumentException('Unable to convert the data from binary');
+        }
+        $data = current($res);
+
+        return new self(BrickBigInteger::fromBase($data, 16));
+    }
+
+    public static function createFromDecimal(int $value): self
+    {
+        return new self(BrickBigInteger::of($value));
+    }
+
+    /**
+     * Converts a BigInteger to a binary string.
+     */
+    public function toBytes(): string
+    {
+        if ($this->value->isEqualTo(BrickBigInteger::zero())) {
+            return '';
+        }
+
+        $temp = $this->value->toBase(16);
+        $temp = 0 !== (mb_strlen($temp, '8bit') & 1) ? '0'.$temp : $temp;
+        $temp = hex2bin($temp);
+        if (false === $temp) {
+            throw new InvalidArgumentException('Unable to convert the data into binary');
+        }
+
+        return ltrim($temp, chr(0));
+    }
+
+    /**
+     * Adds two BigIntegers.
+     *
+     *  @param BigInteger $y
+     *
+     *  @return BigInteger
+     */
+    public function add(self $y): self
+    {
+        $value = $this->value->plus($y->value);
+
+        return new self($value);
+    }
+
+    /**
+     * Subtracts two BigIntegers.
+     *
+     *  @param BigInteger $y
+     *
+     *  @return BigInteger
+     */
+    public function subtract(self $y): self
+    {
+        $value = $this->value->minus($y->value);
+
+        return new self($value);
+    }
+
+    /**
+     * Multiplies two BigIntegers.
+     *
+     * @param BigInteger $x
+     *
+     *  @return BigInteger
+     */
+    public function multiply(self $x): self
+    {
+        $value = $this->value->multipliedBy($x->value);
+
+        return new self($value);
+    }
+
+    /**
+     * Performs modular exponentiation.
+     *
+     * @param BigInteger $e
+     * @param BigInteger $n
+     *
+     * @return BigInteger
+     */
+    public function modPow(self $e, self $n): self
+    {
+        $value = $this->value->modPow($e->value, $n->value);
+
+        return new self($value);
+    }
+
+    /**
+     * Performs modular exponentiation.
+     *
+     * @param BigInteger $d
+     *
+     * @return BigInteger
+     */
+    public function mod(self $d): self
+    {
+        $value = $this->value->mod($d->value);
+
+        return new self($value);
+    }
+
+    /**
+     * Compares two numbers.
+     *
+     * @param BigInteger $y
+     */
+    public function compare(self $y): int
+    {
+        return $this->value->compareTo($y->value);
+    }
+}