(Android™) Use a Custom Set of Trusted Root Certificates

Demonstrates how to build a set of trusted root certificates to be used globally by all Chilkat classes.

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

    CkTrustedRoots trustedRoots = new CkTrustedRoots();

    //  Indicate that we will NOT trust any pre-installed certificates on the system.
    trustedRoots.put_TrustSystemCaRoots(false);

    // Thawte is a certificate authority that provides a .zip download of their
    // root CA certificates:  https://www.thawte.com/roots/index.html
    // The direct download link is: https://www.verisign.com/support/thawte-roots.zip
    // Note: The above URLs are valid at the time of writing this example (29-May-2015).

    // Assuming the .zip has already been downloaded, open it and load each .pem file into
    // our trusted roots object.
    CkZip zip = new CkZip();

    // Open a .zip containing PEM files, among other things..
    boolean success = zip.OpenZip("qa_data/certs/thawte-roots.zip");
    if (success != true) {
        Log.i(TAG, zip.lastErrorText());
        return;
        }

    CkZipEntry entry = zip.FirstMatchingEntry("*.pem");
    if (zip.get_LastMethodSuccess() != true) {
        Log.i(TAG, "No entries matched.");
        return;
        }

    CkZipEntry nextEntry;
    String pemStr;

    CkCert cert = new CkCert();

    boolean bHasMoreEntries = true;
    while ((bHasMoreEntries == true)) {

        Log.i(TAG, "Entry: " + entry.fileName());

        // Get the PEM of the CA cert:
        pemStr = entry.unzipToString(0,"utf-8");

        // Load it into a certificate object:
        success = cert.LoadPem(pemStr);
        if (success != true) {
            Log.i(TAG, cert.lastErrorText());
            }

        // Add it to the trusted roots.
        trustedRoots.AddCert(cert);

        // The NextMatchingEntry method was added in v9.5.0.50
        nextEntry = entry.NextMatchingEntry("*.pem");
        bHasMoreEntries = entry.get_LastMethodSuccess();

        entry = nextEntry;
        }

    //  Activate the trusted roots globally for all Chilkat objects.
    //  This call really shouldn't fail, so we're not checking the return value.
    success = trustedRoots.Activate();

  }

  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."
  }
}