Exception in thread “main” java.security.InvalidKeyException: Illegal key size or default parameters [duplicate]

Answer 1

Download the JCE for Java 7 from this link http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html

and open the path C:\Program Files\Java\jdk1.7.0_80\jre\lib\security and paste the two jars here.(Even if the two jars were already present replace those two jars)

Answer 2

For JAVA 7 the download link is jce-7-download

Copy the two downloaded jars in Java\jdk1.7.0_10\jre\lib\security Take a backup of older jars to be on safer side.

Answer 3

As of JDK 1.8u151 it is not necessary to download the JCE libraries separately. Simply edit:

$JDK_HOME/jre/lib/security/java.security

and uncomment the line:

crypto.policy=unlimited

Answer 4

Probably you did not install the JCE Policy file yet.

Download this file:

• Java 6

• Java 7

• Java 8

And Install the file in ${java.home}/jre/lib/security/.

${java.home} refers to your installation directory of Java

for mac:

• open finder
• press command + shift + g
• type /Library/Java/JavaVirtualMachines
• navigate to your version of JDK
• then Contents/Home/jre/lib/security
• unzip the downloaded file and place all files inside here

for CLI

unzip downloaded_policy_file.zip  -d /Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security/

mv /Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security/UnlimitedJCEPolicyJDK<VERSION>/* /Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security  

rm -rf Library/Java/JavaVirtualMachines/<JDK_VERSION>/Contents/Home/jre/lib/security/UnlimitedJCEPolicyJDK<VERSION>/

Answer 5

In case you using Mac with homebrew

brew cask install jce-unlimited-strength-policy