Current File : /www/varak.net/nextcloud.varak.net/nextcloud/3rdparty/web-auth/cose-lib/src/BigInteger.php
<?php
declare(strict_types=1);
namespace Cose;
use Brick\Math\BigInteger as BrickBigInteger;
use function chr;
use function hex2bin;
use function strlen;
use function unpack;
/**
* @internal
*/
final class BigInteger
{
private function __construct(
private readonly BrickBigInteger $value
) {
}
public static function createFromBinaryString(string $value): self
{
$res = unpack('H*', $value);
$data = current($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);
$temp = 0 !== (strlen($temp) & 1) ? '0' . $temp : $temp;
$temp = hex2bin($temp);
return ltrim($temp, chr(0));
}
/**
* Adds two BigIntegers.
*/
public function add(self $y): self
{
$value = $this->value->plus($y->value);
return new self($value);
}
/**
* Subtracts two BigIntegers.
*/
public function subtract(self $y): self
{
$value = $this->value->minus($y->value);
return new self($value);
}
/**
* Multiplies two BigIntegers.
*/
public function multiply(self $x): self
{
$value = $this->value->multipliedBy($x->value);
return new self($value);
}
/**
* Performs modular exponentiation.
*/
public function modPow(self $e, self $n): self
{
$value = $this->value->modPow($e->value, $n->value);
return new self($value);
}
/**
* Performs modular exponentiation.
*/
public function mod(self $d): self
{
$value = $this->value->mod($d->value);
return new self($value);
}
/**
* Compares two numbers.
*/
public function compare(self $y): int
{
return $this->value->compareTo($y->value);
}
}
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