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import java.io.FileInputStream;
import java.security.Principal;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
public class Main {
public static void main(String args[]) throws Exception {
Certificate[] certpath = new Certificate[args.length];
CertificateFactory cf = CertificateFactory.getInstance("X.509");
for (int i = 0; i < args.length; i++) {
FileInputStream in = new FileInputStream(args[i]);
certpath[i] = cf.generateCertificate(in);
}
for (int i = 0; i < certpath.length - 1; i++) {
Principal issuer = ((X509Certificate) certpath[i]).getIssuerDN();
Principal subject = ((X509Certificate) certpath[i + 1]).getSubjectDN();
if (!issuer.equals(subject)) {
System.out.println("in " + i + " issuer is " + issuer);
System.out.println("But in " + (i + 1));
System.out.println("subject is " + subject);
break;
}
}
}
}
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