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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*******************************************************************************/
package org.ofbiz.base.crypto;
import java.security.NoSuchAlgorithmException;
import java.security.InvalidKeyException;
import java.security.InvalidAlgorithmParameterException;
import java.security.spec.InvalidKeySpecException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.BadPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.DESedeKeySpec;
import org.ofbiz.base.util.GeneralException;
/**
* Utility class for doing DESded (3DES) Two-Way Encryption
*
*/
public class DesCrypt {
public static final String module = DesCrypt.class.getName();
public static SecretKey generateKey() throws NoSuchAlgorithmException {
KeyGenerator keyGen = KeyGenerator.getInstance("DESede");
// generate the DES3 key
return keyGen.generateKey();
}
public static byte[] encrypt(SecretKey key, byte[] bytes) throws GeneralException {
Cipher cipher = DesCrypt.getCipher(key, Cipher.ENCRYPT_MODE);
byte[] encBytes = null;
try {
encBytes = cipher.doFinal(bytes);
} catch (IllegalStateException e) {
throw new GeneralException(e);
} catch (IllegalBlockSizeException e) {
throw new GeneralException(e);
} catch (BadPaddingException e) {
throw new GeneralException(e);
}
return encBytes;
}
public static byte[] decrypt(SecretKey key, byte[] bytes) throws GeneralException {
Cipher cipher = DesCrypt.getCipher(key, Cipher.DECRYPT_MODE);
byte[] decBytes = null;
try {
decBytes = cipher.doFinal(bytes);
} catch (IllegalStateException e) {
throw new GeneralException(e);
} catch (IllegalBlockSizeException e) {
throw new GeneralException(e);
} catch (BadPaddingException e) {
throw new GeneralException(e);
}
return decBytes;
}
public static SecretKey getDesKey(byte[] rawKey) throws GeneralException {
SecretKeyFactory skf = null;
try {
skf = SecretKeyFactory.getInstance("DESede");
} catch (NoSuchAlgorithmException e) {
throw new GeneralException(e);
}
// load the raw key
if (rawKey.length > 0) {
DESedeKeySpec desedeSpec1 = null;
try {
desedeSpec1 = new DESedeKeySpec(rawKey);
} catch (InvalidKeyException e) {
throw new GeneralException(e);
}
// create the SecretKey Object
SecretKey key = null;
try {
key = skf.generateSecret(desedeSpec1);
} catch (InvalidKeySpecException e) {
throw new GeneralException(e);
}
return key;
} else {
throw new GeneralException("Not a valid DESede key!");
}
}
// return a cipher for a key - DESede/CBC/PKCS5Padding IV = 0
protected static Cipher getCipher(SecretKey key, int mode) throws GeneralException {
byte[] zeros = { 0, 0, 0, 0, 0, 0, 0, 0 };
IvParameterSpec iv = new IvParameterSpec(zeros);
// create the Cipher - DESede/CBC/NoPadding
Cipher encCipher = null;
try {
encCipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
} catch (NoSuchAlgorithmException e) {
throw new GeneralException(e);
} catch (NoSuchPaddingException e) {
throw new GeneralException(e);
}
try {
encCipher.init(mode, key, iv);
} catch (InvalidKeyException e) {
throw new GeneralException(e);
} catch (InvalidAlgorithmParameterException e) {
throw new GeneralException(e);
}
return encCipher;
}
}