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(Android™) Decrypt2

Demonstrates how to decrypt MIME using a certificate and private key where the certificate and its corresponding private key are stored in separate files -- a .cer for the certificate, and a .pem for the private key.

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);

    CkMime mime = new CkMime();

    boolean success;
    success = mime.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        Log.i(TAG, mime.lastErrorText());
        return;
    }

    //  Load the certificate from a .cer file.
    CkCert cert = new CkCert();
    success = cert.LoadFromFile("aaworkarea/myCert.cer");
    if (success == false) {
        Log.i(TAG, cert.lastErrorText());
        return;
    }

    //  Load the private key from an encrypted PEM file.
    //  (A private key can be loaded from other file formats also..)
    CkPrivateKey privKey = new CkPrivateKey();
    success = privKey.LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem","myPassword");
    if (success == false) {
        Log.i(TAG, privKey.lastErrorText());
        return;
    }

    success = mime.LoadMimeFile("aaworkarea/encryptedMime.txt");
    if (success == false) {
        Log.i(TAG, mime.lastErrorText());
        return;
    }

    //  Decrypt using the cert and associated private key
    success = mime.Decrypt2(cert,privKey);
    if (success == false) {
        Log.i(TAG, mime.lastErrorText());
        return;
    }

    //  Save the S/MIME to a file.
    success = mime.SaveMime("aaworkarea/decryptedMime.txt");
    if (success == false) {
        Log.i(TAG, mime.lastErrorText());
        return;
    }

    Log.i(TAG, "success!");

  }

  static {
      // Important: Make sure the name passed to loadLibrary matches the shared library
      // found in your project's libs/armeabi directory.
      //  for "libchilkat.so", pass "chilkat" to loadLibrary
      //  for "libchilkatemail.so", pass "chilkatemail" to loadLibrary
      //  etc.
      // 
      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."
  }
}

 

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