Android™

POP3 Read S/MIME Encrypted Email

Read S/MIME 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 assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // The mailman object is used for receiving (POP3) 
    // and sending (SMTP) email.
    CkMailMan mailman = new CkMailMan();

    // Set the POP3 server's hostname
    mailman.put_MailHost("pop.example.com");

    // Set the POP3 login/password.
    mailman.put_PopUsername("myLogin");
    mailman.put_PopPassword("myPassword");

    // If running on Microsoft Windows, the Chilkat mailman
    // will automatically search the registry-based certificate stores
    // for matching certificates and private keys required for
    // decryption.  However, on Linux, MAX OS X, and other
    // operating systems, no such thing exists.  Therefore, you'll 
    // need to specify one or more PFX (.p12 / .pfx) files as
    // sources for locating the certs required for decyrption.
    success = mailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1");
    if (success == false) {
        Log.i(TAG, mailman.lastErrorText());
        return;
        }

    success = mailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx","pfxPassword2");
    if (success == false) {
        Log.i(TAG, mailman.lastErrorText());
        return;
        }

    // ...
    // Note: On MS Windows, it is not required to provide PFX sources
    // if the needed certs and private keys are already installed
    // on the system (in the registry-based certificate stores).

    // Copy the all email from the user's POP3 mailbox 
    // into a bundle object.  The email remains on the server.
    CkEmailBundle bundle = new CkEmailBundle();
    boolean keepOnServer = true;
    boolean headersOnly = false;
    // Irrelevent because we are NOT downloading headers-only
    int numBodyLines = 0;
    success = mailman.FetchAll(keepOnServer,headersOnly,numBodyLines,bundle);
    if (success == false) {
        Log.i(TAG, mailman.lastErrorText());
        return;
        }

    // S/MIME security envelopes are automatically "unwrapped" 
    // when a message is retrieved from the server. Signed emails are automatically verified, and 
    // encrypted emails are automatically decrypted, restoring the email to the original state before 
    // signing and/or encrypting. Information about the signing and encrypting certificates can be 
    // retrieved from the Email object (methods: GetSignedByCert, GetEncryptedByCert; 
    // properties: SignedBy, EncryptedBy, SignaturesValid, Decrypted, ReceivedSigned, 
    // ReceivedEncrypted).

    // Loop over the bundle
    CkEmail email = new CkEmail();
    int i = 0;
    while (i < bundle.get_MessageCount()) {

        bundle.EmailAt(i,email);

        Log.i(TAG, email.ck_from());
        Log.i(TAG, email.subject());

        // At this point, if the email was signed and/or encrypted, it is already "unwrapped", i.e.
        // the email is already decrypted and in a state as if it were never signed or encrypted.
        // You may check to see if the email was received encrypted or signed, and if so,
        // whether it was successfully unwrapped and who signed or encrypted it:
        if (email.get_ReceivedEncrypted() == true) {

            Log.i(TAG, "This email was encrypted when received.");
            if (email.get_Decrypted() == true) {
                Log.i(TAG, "This email was successfully decrypted.  It was encrypted by:");
                Log.i(TAG, email.encryptedBy());
                }
            else {
                Log.i(TAG, "This email was not decrypted.");
                }

            }

        if (email.get_ReceivedSigned() == true) {

            Log.i(TAG, "This email was signed when received.");
            if (email.get_SignaturesValid() == true) {
                Log.i(TAG, "The signature was verified.  It was signed by:");
                Log.i(TAG, email.signedBy());
                }
            else {
                Log.i(TAG, "The signature verification failed.");
                }

            }

        // The email's body, HTML body, attachments, etc.
        // are decrypted and available just like any non-encrypted email.

        Log.i(TAG, "--");

        i = i + 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."
  }
}