convert validate/check functions

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

lib/Froxlor/Domain/Domain.php

@@ -120,4 +120,46 @@ class Domain
 			));
 		}
 	}
+
+	/**
+	 * checks give path for security issues
+	 * and returns a string that can be appended
+	 * to a line for a open_basedir directive
+	 *
+	 * @param string $path
+	 *        	the path to check and append
+	 * @param boolean $first
+	 *        	if true, no ':' will be prefixed to the path
+	 *        	
+	 * @return string
+	 */
+	public static function appendOpenBasedirPath($path = '', $first = false)
+	{
+		if ($path != '' && $path != '/' && (! preg_match("#^/dev#i", $path) || preg_match("#^/dev/urandom#i", $path)) && ! preg_match("#^/proc#i", $path) && ! preg_match("#^/etc#i", $path) && ! preg_match("#^/sys#i", $path) && ! preg_match("#:#", $path)) {
+
+			if (preg_match("#^/dev/urandom#i", $path)) {
+				$path = \Froxlor\FileDir::makeCorrectFile($path);
+			} else {
+				$path = \Froxlor\FileDir::makeCorrectDir($path);
+			}
+
+			// check for php-version that requires the trailing
+			// slash to be removed as it does not allow the usage
+			// of the subfolders within the given folder, fixes #797
+			if ((PHP_MINOR_VERSION == 2 && PHP_VERSION_ID >= 50216) || PHP_VERSION_ID >= 50304) {
+				// check trailing slash
+				if (substr($path, - 1, 1) == '/') {
+					// remove it
+					$path = substr($path, 0, - 1);
+				}
+			}
+
+			if ($first) {
+				return $path;
+			}
+
+			return ':' . $path;
+		}
+		return '';
+	}
 }