Mashic: Automated Mashup Sandboxing based on Inter-frame Communication

Abstract

We propose a new compiler, called Mashic, for the automatic generation of secure Javascript-based mashups from existing mashup code. The Mashic compiler can effortlessly be applied to existing mashups based on a wide-range of gadget APIs. It offers security and correctness guarantees. Security is achieved via the Same Origin Policy. Correctness is ensured in the presence of benign gadgets, that satisfy confidentiality and integrity constrains with regard to the integrator code. The compiler has been successfully applied to real world mashups based on Google maps, Bing maps, YouTube, and Zwibbler APIs.

Draft long version

An extended long version of our CSF paper can be found here. This version contains details of JS decorated semantics, CPS transformation rules and proofs of theorems.

Mashic Compiler Prototype Implementation

The machic compiler can be downloaded from here. The compiler is written in a dialect of scheme - Bigloo.

Demos

For each of the demos, the integrator is hosted on www.mashic.net, the sandboxed gadget is hosted on www.untrusted-gadget.info.

• Random markers (google maps): original mashic compilation
• Random polylines (google maps): original mashic compilation
• Map controls (bing maps): original mashic compilation
• Youtube controls (youtube api): original mashic compilation
• Random markers and polylines (multiple gadgets): original mashic compilation

These demos may require the lastest version of your web browser. They are tested to be compatible with Firefox 3.5+, Google Chrome 11+, Internet Explorer 9, Safari 5+.