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Diffstat (limited to 'vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoreferrer.php')
-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoreferrer.php37
1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoreferrer.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoreferrer.php
new file mode 100644
index 0000000..587dc2e
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/TargetNoreferrer.php
@@ -0,0 +1,37 @@
+<?php
+
+// must be called POST validation
+
+/**
+ * Adds rel="noreferrer" to any links which target a different window
+ * than the current one. This is used to prevent malicious websites
+ * from silently replacing the original window, which could be used
+ * to do phishing.
+ * This transform is controlled by %HTML.TargetNoreferrer.
+ */
+class HTMLPurifier_AttrTransform_TargetNoreferrer extends HTMLPurifier_AttrTransform
+{
+ /**
+ * @param array $attr
+ * @param HTMLPurifier_Config $config
+ * @param HTMLPurifier_Context $context
+ * @return array
+ */
+ public function transform($attr, $config, $context)
+ {
+ if (isset($attr['rel'])) {
+ $rels = explode(' ', $attr['rel']);
+ } else {
+ $rels = array();
+ }
+ if (isset($attr['target']) && !in_array('noreferrer', $rels)) {
+ $rels[] = 'noreferrer';
+ }
+ if (!empty($rels) || isset($attr['rel'])) {
+ $attr['rel'] = implode(' ', $rels);
+ }
+
+ return $attr;
+ }
+}
+