move sftp into libraries (sorry Jim :/)

git-svn-id: file:///svn/phpbb/trunk@9557 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/includes/libraries/sftp/random.php

@@ -0,0 +1,64 @@
+<?php
+/**
+*
+* @package sftp
+* @version $Id$
+* @copyright (c) 2006 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Code from http://phpseclib.sourceforge.net/
+*
+* Modified by phpBB Group to meet our coding standards
+* and being able to integrate into phpBB
+*
+* Copyright 2007-2009 TerraFrost <terrafrost@php.net>
+* Copyright 2009+ phpBB
+*
+* @package sftp
+* @author  TerraFrost <terrafrost@php.net>
+*/
+
+/**
+ * Generate a random value.  Feel free to replace this function with a cryptographically secure PRNG.
+ *
+ * @param optional Integer $min
+ * @param optional Integer $max
+ * @param optional String $randomness_path
+ * @return Integer
+ * @access public
+ */
+function crypt_random($min = 0, $max = 0x7FFFFFFF, $randomness_path = '/dev/urandom')
+{
+	static $seeded = false;
+
+	if (!$seeded)
+	{
+		$seeded = true;
+		if (file_exists($randomness_path))
+		{
+			$fp = fopen($randomness_path, 'r');
+			$temp = unpack('Nint', fread($fp, 4));
+			mt_srand($temp['int']);
+			fclose($fp);
+		}
+		else
+		{
+			list($sec, $usec) = explode(' ', microtime());
+			mt_srand((float) $sec + ((float) $usec * 100000));
+		}
+	}
+
+	return mt_rand($min, $max);
+}
+?>