Java by API/java.security.cert/PKIXCertPathValidatorResult

PKIXCertPathValidatorResult: getPublicKey()

  
import java.io.FileInputStream;
import java.math.BigInteger;
import java.security.KeyStore;
import java.security.PublicKey;
import java.security.cert.CertPath;
import java.security.cert.CertPathValidator;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.PKIXCertPathValidatorResult;
import java.security.cert.PKIXParameters;
import java.security.cert.TrustAnchor;
import java.security.cert.X509Certificate;
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();
    FileInputStream in = new FileInputStream(args[0]);
    Certificate c = cf.generateCertificate(in);
    mylist.add(c);
    CertPath cp = cf.generateCertPath(mylist);
    FileInputStream kin = new FileInputStream(args[0]);
    KeyStore ks = KeyStore.getInstance("JKS");
    ks.load(kin, args[1].toCharArray());
    PKIXParameters params = new PKIXParameters(ks);
    params.setRevocationEnabled(false);
    CertPathValidator cpv = CertPathValidator.getInstance("PKIX");
    PKIXCertPathValidatorResult result = (PKIXCertPathValidatorResult) cpv.validate(cp, params);
    PublicKey pbk = result.getPublicKey();
    byte[] pkenc = pbk.getEncoded();
    BigInteger pk = new BigInteger(pkenc);
    System.out.println(pk.toString(16));
    TrustAnchor anc = result.getTrustAnchor();
    X509Certificate xc = anc.getTrustedCert();
    System.out.println(xc.getSubjectDN());
    System.out.println(xc.getIssuerDN());
  }
}

PKIXCertPathValidatorResult: getTrustAnchor()

  
import java.io.FileInputStream;
import java.math.BigInteger;
import java.security.KeyStore;
import java.security.PublicKey;
import java.security.cert.CertPath;
import java.security.cert.CertPathValidator;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.PKIXCertPathValidatorResult;
import java.security.cert.PKIXParameters;
import java.security.cert.TrustAnchor;
import java.security.cert.X509Certificate;
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();
    FileInputStream in = new FileInputStream(args[0]);
    Certificate c = cf.generateCertificate(in);
    mylist.add(c);
    CertPath cp = cf.generateCertPath(mylist);
    FileInputStream kin = new FileInputStream(args[0]);
    KeyStore ks = KeyStore.getInstance("JKS");
    ks.load(kin, args[1].toCharArray());
    PKIXParameters params = new PKIXParameters(ks);
    params.setRevocationEnabled(false);
    CertPathValidator cpv = CertPathValidator.getInstance("PKIX");
    PKIXCertPathValidatorResult result = (PKIXCertPathValidatorResult) cpv.validate(cp, params);
    PublicKey pbk = result.getPublicKey();
    byte[] pkenc = pbk.getEncoded();
    BigInteger pk = new BigInteger(pkenc);
    System.out.println(pk.toString(16));
    TrustAnchor anc = result.getTrustAnchor();
    X509Certificate xc = anc.getTrustedCert();
    System.out.println(xc.getSubjectDN());
    System.out.println(xc.getIssuerDN());
  }
}