Groups > comp.lang.java.programmer > #6632

Re: Unsealing a jar file at runtime

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From	Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at>
Subject	Re: Unsealing a jar file at runtime
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raphfrk@gmail.com <raphfrk@gmail.com> wrote:
> I don't suppose that this is possible, perhaps with reflection?
> The idea is for a plugin to extend a class, but the class is not a
> public class, so can only be extended from within the same package.
> If the jar file was unsealed, then a class could be created within the
> plugin that is in the same package, is public and extends the non-
> public class.

Breaking open a seal is typically easily done.
Reinstating someone else's seal on the changed
content is "believed" to be much harder. I also
believe that it is, but I'm no crypto-expert.

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Unsealing a jar file at runtime "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-07-28 02:36 -0700
  Re: Unsealing a jar file at runtime Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-07-28 11:21 +0000
    Re: Unsealing a jar file at runtime lewbloch <lewbloch@gmail.com> - 2011-07-29 13:42 -0700
    Re: Unsealing a jar file at runtime "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-08-01 14:48 -0700
      Re: Unsealing a jar file at runtime Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-08-01 21:22 -0400
      Re: Unsealing a jar file at runtime Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-08-02 13:41 +0000

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