Smartcard Driver Fuzzing Tools

This is a collection of several tools that help in fuzzing smartcard drivers for *nix and windows. As usual for such stuff, it is quite hackish in some parts and more tested in others :-) If you have questions or need help, email [email protected] or read our blogpost at:

https://www.x41-dsec.de/lab/blog/smartcards/

What is in here?

/OpenSC/

A patch to OpenSC (654ca69c47f98dd6a82b4adc0bb6bb8ead887163) which adds another reader driver, that retrieves the APDU responses from an external file. This file can be fed with AFL for efficient fuzzing.

/scard_override/

A Linux library you can preload in order to fuzz smartcard applications, which use winscard instead of OpenSC.

/scard_win/

A windows library and testcase. The library can be preloaded in front of your windows smartcard driver. The testcase tries to interact with the driver. Only rudimentary.

/loadlibrary/

A monkey-patched version of tavisos loadlibrary, which allows to load certain winscard drivers on linux in order to fuzz them.