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Server : LiteSpeed System : Linux srv104790275 5.15.0-161-generic #171-Ubuntu SMP Sat Oct 11 08:17:01 UTC 2025 x86_64 User : dewac4139 ( 1077) PHP Version : 8.0.30 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory : /usr/local/CyberCP/public/phpmyadmin/libraries/classes/WebAuthn/ |
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<?php
declare(strict_types=1);
namespace PhpMyAdmin\WebAuthn;
use function fopen;
use function fread;
use function ftell;
use function fwrite;
use function rewind;
final class DataStream
{
/** @var resource */
private $stream;
/**
* @throws WebAuthnException
*/
public function __construct(string $binaryString)
{
$resource = fopen('php://memory', 'rb+');
if ($resource === false || fwrite($resource, $binaryString) === false) {
throw new WebAuthnException();
}
if (! rewind($resource)) {
throw new WebAuthnException();
}
$this->stream = $resource;
}
/**
* @throws WebAuthnException
*/
public function take(int $length): string
{
if ($length < 0) {
throw new WebAuthnException();
}
if ($length === 0) {
return '';
}
$string = fread($this->stream, $length);
if ($string === false) {
throw new WebAuthnException();
}
return $string;
}
/**
* @throws WebAuthnException
*/
public function getPosition(): int
{
$position = ftell($this->stream);
if ($position === false) {
throw new WebAuthnException();
}
return $position;
}
}