File Content: DataStream.php <?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; } } Submit