How to install Java Cryptography Extension (JCE) unlimited strength jurisdiction policy files

How to over come "org.apache.xml.security.encryption.XMLEncryptionException: Illegal key size or default parameters" or "java.security.InvalidKeyException:illegal Key Size" error when invoking secured services

These "org.apache.xml.security.encryption.XMLEncryptionException: Illegal key size or default parameters" or "java.security.InvalidKeyException:illegal Key Size" error usually occurs when we try to invoke a web services in a secured manner and your JVM is not provisioned for Java unlimited security jurisdiction.


To provision for the Java unlimited security jurisdiction we have to install Java Cryptography Extension (JCE) unlimited strength jurisdiction policy files.


How to Install JCE

1. Go to the Oracle Java SE download page http://www.oracle.com/technetwork/java/javase/downloads/index.html
2. Scroll down ... Under "Additional Resources" section you will find "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy File"
3. Download the version that matches your installed JVM E.g. UnlimitedJCEPolicyJDK7.zip
4. Unzip the downloaded zip 
5. Copy local_policy.jar and US_export_policy.jar to the $JAVA_HOME/jre/lib/security (Note: these jars will be already there so you have to overwrite them)
6. Then restart your application to get rid of this exception.