show only hash algorithms that are available on the system

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>

actions/admin/settings/210.security.php

@@ -45,7 +45,7 @@ return array(
 					'type' => 'option',
 					'default' => 0,
 					'option_mode' => 'one',
-					'option_options' => array(0 => $lng['serversettings']['systemdefault'], 1 => 'MD5', 2 => 'BLOWFISH', 3 => 'SHA-256', 4 => 'SHA-512'),
+					'option_options_method' => 'getAvailablePasswordHashes',
 					'save_method' => 'storeSettingField',
 					),
 				'system_allow_error_report_admin' => array(

lib/functions/system/function.getAvailablePasswordHashes.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * This file is part of the Froxlor project.
+ * Copyright (c) 2015 the Froxlor Team (see authors).
+ *
+ * For the full copyright and license information, please view the COPYING
+ * file that was distributed with this source code. You can also view the
+ * COPYING file online at http://files.froxlor.org/misc/COPYING.txt
+ *
+ * @copyright  (c) the authors
+ * @author     Froxlor team <team@froxlor.org> (2014-)
+ * @license    GPLv2 http://files.froxlor.org/misc/COPYING.txt
+ * @package    Functions
+ *
+ * @since      0.9.33.1
+ */
+
+/**
+ * return an array of available hashes for the crypt() function
+ *
+ * @return array
+ */
+function getAvailablePasswordHashes()
+{
+    global $lng;
+    
+    // get available pwd-hases
+    $available_pwdhashes = array(
+        0 => $lng['serversettings']['systemdefault']
+    );
+    if (defined('CRYPT_MD5') && CRYPT_MD5 == 1) {
+        $available_pwdhashes[1] = 'MD5';
+    }
+    if (defined('CRYPT_BLOWFISH') && CRYPT_BLOWFISH == 1) {
+        $available_pwdhashes[2] = 'BLOWFISH';
+    }
+    if (defined('CRYPT_SHA256') && CRYPT_SHA256 == 1) {
+        $available_pwdhashes[3] = 'SHA-256';
+    }
+    if (defined('CRYPT_SHA512') && CRYPT_SHA512 == 1) {
+        $available_pwdhashes[4] = 'SHA-512';
+    }
+    
+    return $available_pwdhashes;
+}