MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.FileInputStream;
import java.security.cert.CertStore;
import java.security.cert.CertStoreParameters;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.CollectionCertStoreParameters;
import java.security.cert.X509CertSelector;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

public class MainClass {
    public static void main(String args[]) throws Exception {

        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        List mylist = new ArrayList();
        FileInputStream in = new FileInputStream(args[0]);
        Certificate c = cf.generateCertificate(in);
        mylist.add(c);

        CertStoreParameters cparam = new CollectionCertStoreParameters(mylist);
        CertStore cs = CertStore.getInstance("Collection", cparam);
        X509CertSelector selec = new X509CertSelector();
        selec.setIssuer("CN=YourName,OU=Network Center," + "O=University,L=ZB,ST=Toronto,C=CN");
        Set clct = (Set) cs.getCertificates(selec);
        Object o[] = clct.toArray();
        for (int i = 0; i < o.length; i++) {
            X509Certificate ct = (X509Certificate) o[i];
            System.out.println("Certificate " + i + " ");
            System.out.println(ct.getSubjectDN());

        }
    }
}