<?php

/*
 * The RandomLib library for securely generating random numbers and strings in PHP
 *
 * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
 * @copyright  2011 The Authors
 * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
 * @version    Build @@version@@
 */

/**
 * The Random Number Source interface.
 *
 * All random number sources must implement this interface
 *
 * PHP version 5.3
 *
 * @category   PHPPasswordLib
 * @package    Random
 *
 * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
 * @copyright  2011 The Authors
 * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
 *
 * @version    Build @@version@@
 */
namespace RandomLib;

/**
 * The Random Number Source interface.
 *
 * All random number sources must implement this interface
 *
 * @category   PHPPasswordLib
 * @package    Random
 *
 * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
 * @codeCoverageIgnore
 */
interface Source
{

    /**
     * Return an instance of Strength indicating the strength of the source
     *
     * @return \SecurityLib\Strength An instance of one of the strength classes
     */
    public static function getStrength();

    /**
     * If the source is currently available.
     * Reasons might be because the library is not installed
     *
     * @return bool
     */
    public static function isSupported();

    /**
     * Generate a random string of the specified size
     *
     * Note: If the source fails to generate enough data, the result must be
     * padded to the requested length.
     *
     * @param int $size The size of the requested random string
     *
     * @return string A string of the requested size
     */
    public function generate($size);
}