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<?php
declare(strict_types=1);
namespace Sabre\DAV\Auth\Backend;
use Sabre\DAV;
/**
* This is an authentication backend that uses a file to manage passwords.
*
* The backend file must conform to Apache's htdigest format
*
* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class File extends AbstractDigest
{
/**
* List of users.
*
* @var array
*/
protected $users = [];
/**
* Creates the backend object.
*
* If the filename argument is passed in, it will parse out the specified file first.
*
* @param string|null $filename
*/
public function __construct($filename = null)
{
if (!is_null($filename)) {
$this->loadFile($filename);
}
}
/**
* Loads an htdigest-formatted file. This method can be called multiple times if
* more than 1 file is used.
*
* @param string $filename
*/
public function loadFile($filename)
{
foreach (file($filename, FILE_IGNORE_NEW_LINES) as $line) {
if (2 !== substr_count($line, ':')) {
throw new DAV\Exception('Malformed htdigest file. Every line should contain 2 colons');
}
list($username, $realm, $A1) = explode(':', $line);
if (!preg_match('/^[a-zA-Z0-9]{32}$/', $A1)) {
throw new DAV\Exception('Malformed htdigest file. Invalid md5 hash');
}
$this->users[$realm.':'.$username] = $A1;
}
}
/**
* Returns a users' information.
*
* @param string $realm
* @param string $username
*
* @return string
*/
public function getDigestHash($realm, $username)
{
return isset($this->users[$realm.':'.$username]) ? $this->users[$realm.':'.$username] : false;
}
}
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