public static void main(String[] args) {

        /* Verify a DSA signature */

        if (args.length != 3) {
            System.out.println("Usage: VerSig " +
                "certfile signaturefile " + "datafile");
        }
        else try {
     	
        	verifySign(args[0], args[1], args[2]);

        } catch (Exception e) {
            System.err.println("Caught exception " + e.toString());
        }
    }