Anyone know of a good File Encryption Java program?

Preferably a program that has source code available. I'm working on making the password saving function of my program secure. I already have it so the user has to have 2 passwords. The 2nd password is used as a key to encrypt the 1st password. I will then save it to a file. Now I want to encrypt the file itself.

Why not encrypt the file the same way you encrypt the password?

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Does anyone know of any Sun Classes for Java Cryptographic Extension -JCE ?

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Edited by: Mister_Schoenfelder on Apr 17, 2009 11:31 AM

Maybe this can be helpful?
com.someone.DESEncrypter
======================
package com.someone;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class DESEncrypter {
    Cipher ecipher;
    Cipher dcipher;
    // 8-byte Salt
    byte[] salt = {
        (byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32,
        (byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03
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    int iterationCount = 19;
    public DESEncrypter(String passPhrase) {
        try {
            // Create the key
            KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
            SecretKey key = SecretKeyFactory.getInstance(
                "PBEWithMD5AndDES").generateSecret(keySpec);
            ecipher = Cipher.getInstance(key.getAlgorithm());
            dcipher = Cipher.getInstance(key.getAlgorithm());
            // Prepare the parameter to the ciphers
            AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
            // Create the ciphers
            ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
            dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
        } catch (java.security.InvalidAlgorithmParameterException e) {
             e.printStackTrace();
        } catch (java.security.spec.InvalidKeySpecException e) {
             e.printStackTrace();
        } catch (javax.crypto.NoSuchPaddingException e) {
             e.printStackTrace();
        } catch (java.security.NoSuchAlgorithmException e) {
             e.printStackTrace();
        } catch (java.security.InvalidKeyException e) {
             e.printStackTrace();
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        try {
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        } catch (javax.crypto.NoSuchPaddingException e) {
             e.printStackTrace();
        } catch (java.security.NoSuchAlgorithmException e) {
             e.printStackTrace();
        } catch (java.security.InvalidKeyException e) {
             e.printStackTrace();
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         String str = decrypt(s, false);
         return new sun.misc.BASE64Decoder().decodeBuffer(str);
    public String encrypt(String str, boolean useUTF8) {
        try {
            // Encode the string into bytes using utf-8
            byte[] utf8 = useUTF8 ? str.getBytes("UTF8") : str.getBytes();
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            byte[] enc = ecipher.doFinal(utf8);
            // Encode bytes to base64 to get a string
            return new sun.misc.BASE64Encoder().encode(enc);
        } catch (javax.crypto.BadPaddingException e) {
             e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
             e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
        } catch (java.io.IOException e) {
             e.printStackTrace();
        return null;
    public String decrypt(String str, boolean useUTF8) {
        try {
            // Decode base64 to get bytes
            byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
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        } catch (javax.crypto.BadPaddingException e) {
             e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
             e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
        } catch (java.io.IOException e) {
             e.printStackTrace();
        return null;
     // Here is an example that uses the class
     public static void main(String[] args) {
         try {
             // Generate a temporary key. In practice, you would save this key.
             // See also e464 Encrypting with DES Using a Pass Phrase.
             SecretKey key = KeyGenerator.getInstance("DES").generateKey();
             // Create encrypter/decrypter class
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             // Decrypt
             String decrypted = encrypter.decrypt(encrypted, true);
         } catch (Exception e) {
              e.printStackTrace();
          try {
              // Create encrypter/decrypter class
              DESEncrypter encrypter = new DESEncrypter("My Pass Phrase!");
              // Encrypt
              String encrypted = encrypter.encrypt("Don't tell anybody!", true);
              // Decrypt
              String decrypted = encrypter.decrypt(encrypted, true);
          } catch (Exception e) {
               e.printStackTrace();
}

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