Java Webstart attempt to sandboxed jar as “Trusted-Library”

Question

I'm trying to load a signed jar with an unsigned library through Webstart. However I get a "attempt to open sandboxed jar as Trusted-Library" error. I removed the all permissions setting from my jnlp file, if let it there (which I prefer not to), I get a classnotdefined exception for my library. I'm using Netbeans to sign my jar with Trusted Library setting. Would it work if I signed the library (which is not mine, but GPL'ed)?

All is working locally, btw, just not from Webstart. Thanks, Kaj

The manifest file:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Trusted-Library: true
X-COMMENT: Main-Class will be added automatically by build
Class-Path: lib/tools.jar
Created-By: 1.7.0-b147 (Oracle Corporation)
Main-Class: customcompile.CustomCompile

Name: customcompile/Source.class
SHA-256-Digest: WFa1FC4Q07sE3S9XxmUSEpgUKjvjYo81urGSiiLNBYY=

Name: customcompile/Output.class
SHA-256-Digest: Sc8oRhAcYYrEtWY5iA56bNKx4EuHQHgFfHmXRSYV474=

Name: customcompile/CustomCompile.class
SHA-256-Digest: WYmy6ny6BU6sYFqJCwxSUPsbTWbpvBuPurYuwnZR5sM=

Name: customcompile/MemoryClassLoader.class
SHA-256-Digest: 0bUNmC+gI7dkGFzEmDvAqdOv15UmHOQS8dDVi9FxGFU=

Name: META-INF/INDEX.LIST
SHA-256-Digest: komZP7Un7Uyi8XTq+HvpbZtNF5cfPC8TmGiPBfcO3qk=

Name: customcompile/MemoryFileManager.class
SHA-256-Digest: GorTXt3N3GZ2kUHry7qBfAOgUuYvhWHE3S+SGEjzR7k=

I found some info on the subject as well ( http://download.oracle.com/javase/6/docs/technotes/guides/jweb/mixed_code.html ): at the bottom one finds a Q&A about mixed code, suggesting setting a lazy mode on the library, which did not do anything for me.

Answer 1

You should be able to find answers in Mixing Signed and Unsigned Code. See especially Deploying Signed Applications and Applets Securely Without a Mixed Code Warning.

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Note that manifest above has..

..
Trusted-Library: true
X-COMMENT: Main-Class will be added automatically by build
Trusted-Only: true
..

It should be one or the other of Trusted-Library or Trusted-Only (AFAIU). In this case it should be Trusted-Library.