aboutsummaryrefslogtreecommitdiffstats
path: root/library/HTMLPurifier/AttrTransform/SafeParam.php
diff options
context:
space:
mode:
Diffstat (limited to 'library/HTMLPurifier/AttrTransform/SafeParam.php')
-rw-r--r--library/HTMLPurifier/AttrTransform/SafeParam.php56
1 files changed, 56 insertions, 0 deletions
diff --git a/library/HTMLPurifier/AttrTransform/SafeParam.php b/library/HTMLPurifier/AttrTransform/SafeParam.php
new file mode 100644
index 000000000..3f992ec31
--- /dev/null
+++ b/library/HTMLPurifier/AttrTransform/SafeParam.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * Validates name/value pairs in param tags to be used in safe objects. This
+ * will only allow name values it recognizes, and pre-fill certain attributes
+ * with required values.
+ *
+ * @note
+ * This class only supports Flash. In the future, Quicktime support
+ * may be added.
+ *
+ * @warning
+ * This class expects an injector to add the necessary parameters tags.
+ */
+class HTMLPurifier_AttrTransform_SafeParam extends HTMLPurifier_AttrTransform
+{
+ public $name = "SafeParam";
+ private $uri;
+
+ public function __construct() {
+ $this->uri = new HTMLPurifier_AttrDef_URI(true); // embedded
+ }
+
+ public function transform($attr, $config, $context) {
+ // If we add support for other objects, we'll need to alter the
+ // transforms.
+ switch ($attr['name']) {
+ // application/x-shockwave-flash
+ // Keep this synchronized with Injector/SafeObject.php
+ case 'allowScriptAccess':
+ $attr['value'] = 'never';
+ break;
+ case 'allowNetworking':
+ $attr['value'] = 'internal';
+ break;
+ case 'wmode':
+ $attr['value'] = 'window';
+ break;
+ case 'movie':
+ case 'src':
+ $attr['name'] = "movie";
+ $attr['value'] = $this->uri->validate($attr['value'], $config, $context);
+ break;
+ case 'flashvars':
+ // we're going to allow arbitrary inputs to the SWF, on
+ // the reasoning that it could only hack the SWF, not us.
+ break;
+ // add other cases to support other param name/value pairs
+ default:
+ $attr['name'] = $attr['value'] = null;
+ }
+ return $attr;
+ }
+}
+
+// vim: et sw=4 sts=4