(Android™) Get Text Certificate Extensions by OID

See more Certificates Examples

Demonstrates how to get text certificate extensions by OID. In this example, we have a certificate with the following OID extensions: 1.3.6.1.4.1.49952.5.8.5, 1.3.6.1.4.1.49952.5.8.6, 1.3.6.1.4.1.49952.5.8.7.

Most certificate extensions have values that are ASN.1 (binary). For the majority of cases, an application should call GetExtensionAsXml. For extensions known to have text values (such as the OIDs listed above), an application can instead call GetExtensionAsText.

The GetExtensionAsText method is added in Chilkat v9.5.0.89.

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);

    CkCert cert = new CkCert();

    boolean success = cert.LoadFromFile("qa_data/certs/PUH9.cer");
    if (success == false) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    String oid = "1.3.6.1.4.1.49952.5.8.5";
    String str = cert.getExtensionAsText(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + str);
        }

    oid = "1.3.6.1.4.1.49952.5.8.6";
    str = cert.getExtensionAsText(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + str);
        }

    oid = "1.3.6.1.4.1.49952.5.8.7";
    str = cert.getExtensionAsText(oid);
    if (cert.get_LastMethodSuccess() == true) {
        Log.i(TAG, oid + ": " + str);
        }


  }

  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."
  }
}