(Android™) Find Certificate for Email Encryption

Demonstrates finding the recipient's certificate in the Windows certificate store and using it to send encrypted email.

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.

    boolean success;
    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."
  }
}