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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());
}
}
}
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