Android™

Get the Server Certificate, Certificate Chain, and Root CA Certificate

See more HTTP Examples

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

// 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."
  }
}