(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.

Note: This example requires Chilkat v11.0.0 or greater.

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);

    boolean success = false;

    // 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 = new CkCert();
    success = http.GetServerCert("apple.com",443,sslCert);
    if (success == false) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    CkCertChain certChain = new CkCertChain();
    success = sslCert.BuildCertChain(certChain);
    if (success == false) {
        Log.i(TAG, sslCert.lastErrorText());
        return;
        }

    CkCert cert = new CkCert();
    int i = 0;
    int numCerts = certChain.get_NumCerts();
    while (i < numCerts) {
        certChain.CertAt(i,cert);
        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 = new CkCert();
        certChain.CertAt(numCerts - 1,caCert);
        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."
  }
}