add method to get algorithm id from name

Author: troosan

src/Common/Microsoft/PasswordEncoder.php

@@ -162,6 +162,17 @@ private static function getAlgorithm($algorithmName)
         return $algorithm;
     }
 
+    /**
+     * Returns the algorithm ID
+     *
+     * @param sting $algorithmName
+     * @return int
+     */
+    public static function getAlgorithmId($algorithmName)
+    {
+        return self::$algorithmMapping[$algorithmName][0];
+    }
+
     /**
      * Build combined key from low-order word and high-order word
      *