Android™

Find Certificate for Email Encryption

Demonstrates finding the recipient's certificate in the Windows certificate store and using it to send encrypted email. 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 requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    CkMailMan mailman = new CkMailMan();

    //  Set the SMTP server.
    mailman.put_SmtpHost("smtp.example.com");

    //  Create a new email object
    CkEmail email = new CkEmail();

    email.put_Subject("This email is encrypted");
    email.put_Body("This is a digitally encrypted mail");
    email.put_From("Joe <joe@example.com>");
    //  Emails are encrypted using the recipient's certificate.
    String recipientEmailAddr = "jane@example2.com";
    email.AddTo("Jane",recipientEmailAddr);

    //  Indicate that the email is to be sent encrypted.
    email.put_SendEncrypted(true);

    //  This example demonstrates finding the email encryption certificate
    //  on a Windows system where the certificate is stored in the Windows 
    //  certificate store.

    CkCert cert = new CkCert();
    //  The recipient's certificate is used to encrypt.
    //  (Because the recipient is the only one in possession of the private key to decrypt.)
    success = cert.LoadByEmailAddress(recipientEmailAddr);
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    //  Specify the certificate to be used for encryption.
    success = email.SetEncryptCert(cert);

    success = mailman.SendEmail(email);
    if (success != true) {
        Log.i(TAG, mailman.lastErrorText());
        }
    else {
        Log.i(TAG, "Encrypted Mail Sent!");
        }


  }

  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."
  }
}