Add SAML addon.

saml/vendor/robrichards/xmlseclibs/src/Utils/XPath.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace RobRichards\XMLSecLibs\Utils;
+
+class XPath
+{
+    const ALPHANUMERIC = '\w\d';
+    const NUMERIC = '\d';
+    const LETTERS = '\w';
+    const EXTENDED_ALPHANUMERIC = '\w\d\s\-_:\.';
+
+    const SINGLE_QUOTE = '\'';
+    const DOUBLE_QUOTE = '"';
+    const ALL_QUOTES = '[\'"]';
+
+
+    /**
+     * Filter an attribute value for save inclusion in an XPath query.
+     *
+     * @param string $value The value to filter.
+     * @param string $quotes The quotes used to delimit the value in the XPath query.
+     *
+     * @return string The filtered attribute value.
+     */
+    public static function filterAttrValue($value, $quotes = self::ALL_QUOTES)
+    {
+        return preg_replace('#'.$quotes.'#', '', $value);
+    }
+
+
+    /**
+     * Filter an attribute name for save inclusion in an XPath query.
+     *
+     * @param string $name The attribute name to filter.
+     * @param mixed $allow The set of characters to allow. Can be one of the constants provided by this class, or a
+     * custom regex excluding the '#' character (used as delimiter).
+     *
+     * @return string The filtered attribute name.
+     */
+    public static function filterAttrName($name, $allow = self::EXTENDED_ALPHANUMERIC)
+    {
+        return preg_replace('#[^'.$allow.']#', '', $name);
+    }
+}