EFS-Tools is a set of tools and libraries that enable encrypted file system support in Android. The tools are based on ecryptfs Linux kernel module and provides interfaces to manage ecryptfs mount points.
Since Android is build on top of the Linux kernel, EFS-Tools library and executables can be easily ported to any Android device independently of the AOSP version. However, there is a small demo of EFS-Tools library, which requires graphicall interface. For this to work you must download and build the Android 4.4_r1.2 (kitkat) tree.
x86 emulator - https://github.com/catalinionita/Ecryptfs-Tools-for-Android/wiki/Building-AOSP-4.4_r1.2-with-EFS-Tools-for-x86-Android-Emulator
Under development. Any suggestions, contributions, code reviews and bug reports are welcome.
--Catalin