encryption.AESCrypt.java Source code

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Here is the source code for encryption.AESCrypt.java

Source

/*
 Copyright 2015 Philipp Adam, Manuel Caspari, Nicolas Lukaschek
 contact@ravenapp.org
    
 This file is part of Raven.
    
 Raven is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 Raven is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with Raven. If not, see <http://www.gnu.org/licenses/>.
    
*/

package encryption;

import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import meta.Core;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class AESCrypt {

    private static byte[] iv = new byte[] { -37, -3, 65, 21, -101, 10, -119, -39, 31, 55, 52, -126, -74, 111, -67,
            -28 };

    public static byte[] encrypt(byte[] key_aes, byte[] clean)
            throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        SecretKey secret = new SecretKeySpec(key_aes, "AES");
        Cipher cipher;
        try {
            if (Core.PROVIDER.equals(Core.SPONGEY_CASTLE))
                cipher = Cipher.getInstance("AES/CBC/PKCS7Padding",
                        new org.spongycastle.jce.provider.BouncyCastleProvider());
            else
                cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", new BouncyCastleProvider());
            cipher.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(iv));
            return cipher.doFinal(clean);
        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static byte[] decrypt(byte[] key_aes, byte[] encrypted)
            throws InvalidKeyException, IllegalBlockSizeException, BadPaddingException {

        SecretKey secret = new SecretKeySpec(key_aes, "AES");
        Cipher cipher;
        try {
            if (Core.PROVIDER.equals(Core.SPONGEY_CASTLE))
                cipher = Cipher.getInstance("AES/CBC/PKCS7Padding",
                        new org.spongycastle.jce.provider.BouncyCastleProvider());
            else
                cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", new BouncyCastleProvider());
            cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));

            return cipher.doFinal(encrypted);
        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static byte[] encryptNoPadding(byte[] key_aes, byte[] clean)
            throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        SecretKey secret = new SecretKeySpec(key_aes, "AES");
        Cipher cipher;
        try {
            if (Core.PROVIDER.equals(Core.SPONGEY_CASTLE))
                cipher = Cipher.getInstance("AES/CBC/NoPadding",
                        new org.spongycastle.jce.provider.BouncyCastleProvider());
            else
                cipher = Cipher.getInstance("AES/CBC/NoPadding", new BouncyCastleProvider());
            cipher.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(iv));
            return cipher.doFinal(clean);
        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static byte[] decryptNoPadding(byte[] key_aes, byte[] encrypted)
            throws InvalidKeyException, IllegalBlockSizeException, BadPaddingException {

        SecretKey secret = new SecretKeySpec(key_aes, "AES");
        Cipher cipher;
        try {
            if (Core.PROVIDER.equals(Core.SPONGEY_CASTLE))
                cipher = Cipher.getInstance("AES/CBC/NoPadding",
                        new org.spongycastle.jce.provider.BouncyCastleProvider());
            else
                cipher = Cipher.getInstance("AES/CBC/NoPadding", new BouncyCastleProvider());
            cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));

            return cipher.doFinal(encrypted);
        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        }
        return null;
    }

}