Java tutorial
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.util.ArrayList; import java.util.List; public class MainClass { public static void main(String args[]) throws Exception { CertificateFactory cf = CertificateFactory.getInstance("X.509"); List mylist = new ArrayList(); for (int i = 0; i < args.length; i++) { FileInputStream in = new FileInputStream(args[i]); Certificate c = cf.generateCertificate(in); mylist.add(c); } CertStoreParameters cparam = new CollectionCertStoreParameters(mylist); CertStore cs = CertStore.getInstance("Collection", cparam); System.out.println(cs.getCertStoreParameters()); System.out.println(cs.getProvider()); System.out.println(cs.getType()); } }