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encfs-java is a Java library for accessing data in EncFS volumes. It is able to derive the volume key from a user password, decode encrypted filenames (IV chaining is implemented), decrypt file contents, create new volumes, move/copy/rename files and directories within the volume as well as encrypt file contents into the volume

We do support all encfs volume configuration options, and are interoperable with the official encfs implementation (http://www.arg0.net/encfs). Currently we only support volume created with the latest version (1.7.4), but we target to be able to support volumes created with legacy versions as well.


encfs-java uses Maven for building. Assuming you have a working installation, simply run the following to build the code:

$ mvn compile

To create a JAR file for using encfs-java from another application, do:

$ mvn package

Which will create a JAR file in the {$PROJECT_ROOT}/target/ directory.


This library comes with a demo/example application called EncFSShell. It is a simple shell supporting a few commands such as 'ls', 'cd', 'cat', 'mv' and 'cp' on an EncFS volume. After building the library, add the {$PROJECT_ROOT}/target/classes/ directory to your CLASSPATH, and run like so:

$ java -classpath ${PROJECT_ROOT}/target/classes EncFSShell /path/to/an/encfs/volume

For using the library from another project, include the .JAR file in your classpath and import the org.mrpdaemon.encfs.sec package.s

API Documentation

For API documentation, see:


To test your own comment changes, generate up-to-date docs using Maven:

$ mvn javadoc:javadoc

Which will place your documentation in ${PROJECT_ROOT}/target/site/apidocs/

Common issues

If you are getting an exception due to "Illegal key size" and you are using Sun's JDK, you need to install the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files. See the following link for more information:

Java 6 JCE Link http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html Java 7 JCE Link http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html Java 8 JCE Link http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html Extract files into JDK/JRE/lib/security folder (To whichever version of JRE/JDK x64/x86 you are using)

Thanks to aormerod for pointing this out!


encfs-java is licensed under the Lesser GNU Public License, which allows non-GPL applications to make use of the library with the restriction that the source code for any modifications to the library itself need to be made available to be able to legally redistribute the modified library. For more information, please see the LICENSE file and the Free Software Foundation website.