Android™

Get Issuer Certificate Information

See more Certificates Examples

A certificate contains information about its issuer. This example demonstrates how to get the issuer information from a 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;

    CkCert cert = new CkCert();

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

    // Get issuer information:

    // -----------------------------------------------------------------------
    // (Not all subject fields may exist depending on the issuer certificate.)
    // -----------------------------------------------------------------------

    // Issuer DN (Distinguished Name, i.e. all the Issuer subject parts)
    Log.i(TAG, "DN: " + cert.issuerDN());

    // Common Subject parts:
    // Issuer Common Name
    Log.i(TAG, "CN: " + cert.issuerCN());

    // Issuer Country
    Log.i(TAG, "C: " + cert.issuerC());

    // Issuer Email address
    Log.i(TAG, "E: " + cert.issuerE());

    // Issuer Locality
    Log.i(TAG, "L: " + cert.issuerL());

    // Issuer Organization
    Log.i(TAG, "O: " + cert.issuerO());

    // Issuer Organizational Unit
    Log.i(TAG, "OU: " + cert.issuerOU());

    // Issuer State
    Log.i(TAG, "S: " + cert.issuerS());

  }

  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."
  }
}