javajarjar-signing

How do I unsign a jar?

Is there a way to unsign a java jar file? I have some signed jars I'm trying to use in my development environment, but I get security exceptions, so I want to unsign those jars and I can sign them later when I'm ready to deploy.

Solution

  • I don't know the answer, but here is what I would do:

    1. Unzip the jar file or files in question (jars are just zips)
    2. Look in the META-INF directory for something that was not MANIFEST-MF.
    3. Delete that stuff.
    4. Open the MANIFEST-MF and remove stuff that looked like it was signature related.
    5. rejar.