Adding Embedding-CSP HTTP header

third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Ericsson AB. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 106 matching lines @@
   } else if (name == allowfullscreenAttr) {
     bool oldAllowFullscreen = m_allowFullscreen;
     m_allowFullscreen = !value.isNull();
     if (m_allowFullscreen != oldAllowFullscreen)
       frameOwnerPropertiesChanged();
   } else if (name == permissionsAttr) {
     if (initializePermissionsAttribute())
       m_permissions->setValue(value);
   } else if (RuntimeEnabledFeatures::embedderCSPEnforcementEnabled() &&
              name == cspAttr) {
+    // TODO(amalika): add more robust validation of the value
+    if (!value.getString().containsOnlyASCII()) {
+      m_csp = nullAtom;
+      document().addConsoleMessage(ConsoleMessage::create(
+          OtherMessageSource, ErrorMessageLevel,
+          "'csp' attribute contains non-ASCII characters: " + value));
+      return;
+    }
     AtomicString oldCSP = m_csp;
     m_csp = value;
     if (m_csp != oldCSP)
       frameOwnerPropertiesChanged();
   } else {
     if (name == srcAttr)
       logUpdateAttributeIfIsolatedWorldAndInDocument("iframe", srcAttr,
                                                      oldValue, value);
     HTMLFrameElementBase::parseAttribute(name, oldValue, value);
   }
@@ skipping 61 matching lines @@
 bool HTMLIFrameElement::initializePermissionsAttribute() {
   if (!RuntimeEnabledFeatures::permissionDelegationEnabled())
     return false;
 
   if (!m_permissions)
     m_permissions = HTMLIFrameElementPermissions::create(this);
   return true;
 }
 
 }  // namespace blink