title: Java Utility for Checking Signed JARs
body: <p>All,</p>
  
  <p>Is there a good free Java utility that shows you the key that a JAR file was signed by?</p>
  
  <p>I have a number of JAR files referenced in my application - I want to know which ones were signed by the same certificate.</p>
  
  <p>Basically I want to know this as when I am running my JNLP file (hurray!) I am greeted with the message "JAR resources in the JNLP file are not signed by the same certificate".</p>
  
  <p>I have looked at <a href="https://stackoverflow.com/questions/430755/jar-resources-in-jnlp-are-not-signed-by-the-same-certificate">jar resources in jnlp are not signed by the same certificate</a></p>
  
  <p>I have quite a few JARS so a utility would come in handy.</p>
  
  <p>Edit</p>
  
  <p>The main question is was there a tool that can show me which JARs were signed by which certificate.  Unfortunately the jarsigner tool only tells me if they are signed or not - not by who/what.</p>
  
  <p>Unfortunately I have still not found any tool as yet.</p>
  
  <p>end Edit</p>
  
  <p>Cheers,</p>
  
  <p>Andez</p>