Signing problems with ucf.jar

I've been trying to sign my extension with ucf.jar to make it possible to install the .zxp. I created a self-signed certificate using Keychain Access > Certificate Assistant in MacOSX and exported it to a .p12-file. When i try to build and sign the .zxp with:
java -jar ucf.jar -package -storetype PKCS12 -keystore certificate.p12 -storepass password myExtension.zxp -C "./myExtension/" .
i get the following stacktrace:
Packaging failed: Unknown or invalid signature algorithm.
java.security.GeneralSecurityException: Unknown or invalid signature algorithm.
    at com.adobe.pki.PKIContext.VerifyCertPath(PKIContext.java:167)
    at com.adobe.ucf.CodeSigner.BuildAndVerifyCertChain(CodeSigner.java:297)
    at com.adobe.ucf.CodeSigner.getXMLKeyInfo(CodeSigner.java:241)
    at com.adobe.ucf.CodeSigner.getSignatureXML(CodeSigner.java:184)
    at com.adobe.ucf.UCFOutputStream.finalizeSig(UCFOutputStream.java:264)
    at com.adobe.ucf.UCFPackager.createPackage(UCFPackager.java:109)
    at com.adobe.ucf.UCF.doPackage(UCF.java:114)
    at com.adobe.ucf.UCF.main(UCF.java:64)
Couldnt find anything about this in the sign-toolkit-pdf.

Sorry to hear you've been having problems with this - the next release of the signing toolkit should hopefully make things easier.
For now, please try these two things:
Download the latest version of the signing toolkit (which includes UCF.jar) from here: http://www.adobe.com/devnet/creativesuite/sdk/eula_cs6-signing-toolkit.html
Generate a P12 file using the keytool (e.g./usr/bin/keytool):keytool -genkey -alias ALIAS -keystore FILENAME.p12 -storepass PASSWORD -validity 3650 -keyalg RSA -keysize 2048 -storetype pkcs12
Please let me know how you get on.
Best wishes,
Fraser

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We have a pure Java client that connects to the Weblogic server.
While trying to connect we receive the error message below.
I have unjarred the weblogic.jar file and discovered that the
Stub.class is actually in weblogic/rmi/extensions/server/
while it expects it to be in weblogic/rmi/extensions .
Is there a fix for this as we are trying to upgrade from a previous version of weblogic and go live in Jan.
Thanks
Dave F
java.lang.NoClassDefFoundError: weblogic/rmi/extensions/Stub(

Signing problems with ucf.jar

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