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<?php
/**
* This class contains all the helper functions that
* can be referenced by a config setting. Every function
* here is supposed to validate the given config value
* and wither return the validated and possibly sanitized
* value, or false to indicate that the given value is invalid.
*/
class Validator
{
public static function validate($condition, $value)
{
if (empty($condition)) return $value;
$data = explode(':', $condition, 2);
switch ($data[0]) {
case 'regex':
if (preg_match($data[1], $value)) return $value;
return false;
case 'list':
return self::validateList($data[1], $value);
case 'function':
return self::$data[1]($value);
default:
Util::traceError('Unknown validation method: ' . $data[0]);
}
}
/**
* Validate linux password. If already in $6$ hash form,
* the unchanged value will be returned.
* if empty, an empty string will also be returned.
* Otherwise it it assumed that the value is a plain text
* password that is supposed to be hashed.
*/
private static function linuxPassword($value)
{
if (empty($value)) return '';
if (preg_match('/^\$6\$.+\$./', $value)) return $value;
return Crypto::hash6($value);
}
/**
* Validate value against list.
* @param string $list The list as a string of items, separated by "|"
* @param string $value The value to validate
* @return boolean|string The value, if in list, false otherwise
*/
private static function validateList($list, $value)
{
$list = explode('|', $list);
if (in_array($value, $list)) return $value;
return false;
}
}
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