(Android™) Get the Server Certificate, Certificate Chain, and Root CA Certificate

Demonstrates how to get the HTTP server certificate, its certificate chain, and the root CA certificate.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttp http = new CkHttp();

    // We're getting the SSL/TLS certificate, so make sure to connect to the SSL/TLS port (443).
    CkCert sslCert = http.GetServerSslCert("nationalgeographic.com",443);
    if (http.get_LastMethodSuccess() == false) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    // Note: Prior to v9.5.0.50, this method would fail if the certificate chain could not 
    // be completed to the root.  Starting in v9.5.0.50, the incomplete certificate chain 
    // will be returned.  The certificate chain's ReachesRoot property can be examined to 
    // see if the chain was completed to the root.
    CkCertChain certChain = sslCert.GetCertChain();
    if (sslCert.get_LastMethodSuccess() == false) {
        Log.i(TAG, sslCert.lastErrorText());

        return;
        }

    int i = 0;
    int numCerts = certChain.get_NumCerts();
    while (i < numCerts) {
        CkCert cert = certChain.GetCert(i);
        Log.i(TAG, "SubjectDN " + String.valueOf(i) + ": " + cert.subjectDN());
        Log.i(TAG, "IssuerDN " + String.valueOf(i) + ": " + cert.issuerDN());

        i = i + 1;
        }

    // If the certificate chain reaches the root CA cert, then the last cert in the chain
    // is the root CA cert.
    if (certChain.get_ReachesRoot() == true) {
        CkCert caCert = certChain.GetCert(numCerts - 1);
        Log.i(TAG, "CA Root Cert: " + caCert.subjectDN());

        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}