Android™

Binary Certificate Extension Data

See more Certificates Examples

Demonstrates how to binary certificate extension data by OID.

The GetExtensionBd method is added in Chilkat v9.5.0.96.

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;

    CkCert cert = new CkCert();

    success = cert.LoadFromFile("qa_data/certs/testCert.cer");
    if (success == false) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    CkBinData bd = new CkBinData();

    // The particular certificate in this test contains the following extensions

    String oid = "1.2.250.1.71.1.2.5";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        Log.i(TAG, oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.1.2.2";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        Log.i(TAG, oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.1.2.3";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        Log.i(TAG, oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.1.2.7";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        Log.i(TAG, oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.4.2.5";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        Log.i(TAG, oid + ": " + bd.getEncoded("hex_lower"));
        }

    // Sample output:
    // 1.2.250.1.71.1.2.5: 040180
    // 1.2.250.1.71.1.2.2: 020100
    // 1.2.250.1.71.1.2.3: 1315383032353030303030312f32393030303539313432
    // 1.2.250.1.71.1.2.7: 02010a
    // 1.2.250.1.71.4.2.5: 30060c04534d3236

    // The above binary values are actually ASN.1
    // You can get the ASN.1 decoed by calling GetExtensionAsXml to get it in XML format,
    // and then you extract the values from the XML.

    oid = "1.2.250.1.71.1.2.5";
    String strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.1.2.2";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.1.2.3";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.1.2.7";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.4.2.5";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + strXml);
        }

    // Sample output:
    // 1.2.250.1.71.1.2.5: <octets>gA==</octets>
    // 1.2.250.1.71.1.2.2: <int>00</int>
    // 1.2.250.1.71.1.2.3: <printable>8025000001/2900059142</printable>
    // 1.2.250.1.71.1.2.7: <int>0A</int>
    // 1.2.250.1.71.4.2.5: <sequence><utf8>SM26</utf8></sequence>

    // "gA==" is the base64 encoded byte values
    // "0A" is hex for decimal 1

  }

  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."
  }
}