AES encryption when thrown Java.security.InvalidKeyException:Illegal key size or def

Original: AES encryption when thrown Java.security.InvalidKeyException:Illegal key size or def

When using AES encryption, when the key is greater than 128, the code throws

Java.security.InvalidKeyException:Illegal key size or default parameters

Illegal key size or default parameters means that the key length is restricted, and the Java Runtime environment reads a restricted policy file. Files located in ${java_home}/jre/lib/security

This limitation is due to U.S. control over software exports.

Workaround:

Removing this restriction requires downloading the Java Cryptography Extension (JCE) Unlimited strength Jurisdiction Policy Files.

The Readme.txt of the download package has installation instructions. is to replace the Local_policy.jar and Us_export_policy.jar under ${java_home}/jre/lib/security/.

JDK 5:http://www.oracle.com/technetwork/java/javasebusiness/downloads/ Java-archive-downloads-java-plat-419418.html#jce_policy-1.5.0-oth-jpr

Jdk6:http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html

AES encryption when thrown Java.security.InvalidKeyException:Illegal key size or def