/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.security;
import java.io.ByteArrayInputStream;
import java.io.Serializable;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import com.caucho.hessian.io.Hessian2Input;
import com.caucho.hessian.io.Hessian2Output;
import com.caucho.util.L10N;
import com.caucho.vfs.TempOutputStream;
/**
* Self-encrypted cookie for server to server authentication.
*
* @since Resin 4.0.0
*/
public class SelfEncryptedCookie implements Serializable {
private static final long serialVersionUID = 4678288478579787074L;
private static final L10N L = new L10N(SelfEncryptedCookie.class);
private final String _cookie;
private final long _createTime;
/**
* Hessian serialization
*/
@SuppressWarnings("unused")
private SelfEncryptedCookie()
{
_cookie = null;
_createTime = 0;
}
public SelfEncryptedCookie(String cookie, long createTime)
{
_cookie = cookie;
_createTime = createTime;
}
public String getCookie()
{
return _cookie;
}
public long getCreateTime()
{
return _createTime;
}
public static byte []encrypt(String cookie, long createTime)
{
try {
Cipher cipher = initCipher(cookie, Cipher.ENCRYPT_MODE);
SelfEncryptedCookie cookieObj
= new SelfEncryptedCookie(cookie, createTime);
TempOutputStream tos = new TempOutputStream();
Hessian2Output hOut = new Hessian2Output(tos);
hOut.writeObject(cookieObj);
hOut.close();
TempOutputStream cipherOut = new TempOutputStream();
CipherOutputStream cOut
= new CipherOutputStream(cipherOut, cipher);
tos.writeToStream(cOut);
tos.destroy();
cOut.close();
byte []encryptedData = cipherOut.toByteArray();
cipherOut.destroy();
return encryptedData;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static SelfEncryptedCookie decrypt(String cookie, byte []encData)
{
try {
Cipher cipher = initCipher(cookie, Cipher.DECRYPT_MODE);
ByteArrayInputStream is = new ByteArrayInputStream(encData);
CipherInputStream cIn = new CipherInputStream(is, cipher);
Hessian2Input in = new Hessian2Input(cIn);
Object obj = in.readObject();
if (! (obj instanceof SelfEncryptedCookie))
throw new SecurityException(L.l("SelfEncryptedCookie[] is invalid because it does not correctly decrypt"));
SelfEncryptedCookie cookieObj = (SelfEncryptedCookie) obj;
in.close();
cIn.close();
is.close();
return cookieObj;
} catch (SecurityException e) {
throw e;
} catch (Exception e) {
throw new SecurityException(L.l("SelfEncryptedCookie[] does not correctly decrypt."), e);
}
}
private static Cipher initCipher(String cookie, int mode)
throws NoSuchAlgorithmException,
InvalidKeyException,
NoSuchPaddingException
{
Cipher cipher = Cipher.getInstance("AES");
byte []keyBytes = new byte[cipher.getBlockSize()];
for (int i = 0; i < cookie.length() && i < keyBytes.length; i++) {
keyBytes[i] = (byte) cookie.charAt(i);
}
SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
cipher.init(mode, keySpec);
return cipher;
}
public String toString()
{
return getClass().getSimpleName() + "[]";
}
}