| /******************************************************************************* |
| * 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.apache.ofbiz.base.crypto; |
| |
| import java.security.NoSuchAlgorithmException; |
| import java.security.InvalidKeyException; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.Key; |
| import java.security.spec.InvalidKeySpecException; |
| import javax.crypto.Cipher; |
| import javax.crypto.IllegalBlockSizeException; |
| import javax.crypto.BadPaddingException; |
| import javax.crypto.NoSuchPaddingException; |
| import javax.crypto.KeyGenerator; |
| import javax.crypto.SecretKeyFactory; |
| import javax.crypto.spec.IvParameterSpec; |
| import javax.crypto.spec.DESedeKeySpec; |
| |
| import org.apache.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 Key generateKey() throws NoSuchAlgorithmException { |
| KeyGenerator keyGen = KeyGenerator.getInstance("DESede"); |
| |
| // generate the DES3 key |
| return keyGen.generateKey(); |
| } |
| |
| public static byte[] encrypt(Key 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(Key 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 Key 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 |
| Key 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(Key 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; |
| } |
| } |