Illegal key size about android-backup-extractor HOT 2 CLOSED

You need to install the unlimited strength JCA policy, see README.

from android-backup-extractor.

Thanks, so... I missed that in the README because it wasn't clear on reading the file.
With the requirements on one line like it is, I read "Java 7" as, okay yes, I got the JDK8 so I have at least Java 7, and the text after that as some detail explaining why Java 7 is needed, IE that is included in Java 7. It was unclear that you meant there were two requirements, Java 7 or better and the Java Cryptography Extension (JCE) Unlimited.

May I suggest both that you list these as two requirements and that you do not abbreviate JCE as it's so much like JRE etc. ?

For future reference, should anyone search for the same issue, I'm going to document the steps for installing this on Mac OS X:

1. browse to http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html and accept the license then download the file UnlimitedJCEPolicyJDK7.zip

2. the following in a terminal:

   cd ~/Downloads
   unzip UnlimitedJCEPolicyJDK7.zip
   JAVAHOME=`/usr/libexec/java_home`
   sudo mv $JAVAHOME/jre/lib/security/US_export_policy.jar \
           $JAVAHOME/jre/lib/security/US_export_policy_orig.jar
   sudo mv $JAVAHOME/jre/lib/security/local_policy.jar \
           $JAVAHOME/jre/lib/security/local_policy_orig.jar
   sudo cp UnlimitedJCEPolicy/*.jar $JAVAHOME/jre/lib/security/
   rm -r UnlimitedJCEPolicy UnlimitedJCEPolicyJDK7.zip
   cd
   git clone https://github.com/nelenkov/android-backup-extractor.git abe
   cd abe
   # cd lib
   # curl -O http://www.bouncycastle.org/download/bcprov-jdk15on-152.jar
   # cd ..
   ./gradlew
   java -jar build/libs/abe-all.jar
   

That should show you standard usage, which you can also see without JCE, but you can't unpack without JCE.

Thanks for writing the tool, I hope I can use it to break down and repack a -all backup with only the parts I want to restore...

from android-backup-extractor.