I have several web servers with SSL certificates installed.
My plan is to write a java program which will grab the certs
via ftp, then read (parse) the certificate information.
Ultimately what I want is the expiration date.  I found an
example of printing a cert (listed below), but get unresolved
symbol errors when compiling.  I thought I needed the Java
Cryptography Extension (JCE), so I downloaded and installed
that, but still get the error.  What do I need to do in order
to parse a Verisign certificate, in either .cer or .crt format?

-Thanks

import java.security.cert.*;
import java.io.*;

public class PrintCert {
    public static void main(String args[]) {
        try {
                   FileInputStream fr = new FileInputStream("sdo.cer");
                   X509Certificate c = X509Certificate.getInstance(fr);
           System.out.println("Read in the following certificate:");
           System.out.println("\tCertificate for: " + c.getSubjectDN());
           System.out.println("\tCertificate issued by: " + c.getIssuerDN());
           System.out.println("\tThe certificate is valid from " +
                        c.getNotBefore() + " to " + c.getNotAfter());
           System.out.println("\tCertificate SN# " + c.getSerialNumber());
           System.out.println("\tGenerated with " + c.getSigAlgName());
        } catch (Exception e) {
           e.printStackTrace();
        }
    }