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/*
* Copyright (c) 2012, 2016 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.util.security;
import org.eclipse.net4j.util.ReflectUtil.ExcludeFromDump;
import org.eclipse.net4j.util.lifecycle.Lifecycle;
import org.eclipse.net4j.util.lifecycle.LifecycleUtil;
import java.util.Arrays;
/**
* @author Eike Stepper
* @since 3.3
*/
public class UserManagerAuthenticator extends Lifecycle implements IAuthenticator
{
public static final int DEFAULT_TOKEN_LENGTH = 1024;
@ExcludeFromDump
private String encryptionAlgorithmName = SecurityUtil.PBE_WITH_MD5_AND_DES;
@ExcludeFromDump
private byte[] encryptionSaltBytes = SecurityUtil.DEFAULT_SALT;
@ExcludeFromDump
private int encryptionIterationCount = SecurityUtil.DEFAULT_ITERATION_COUNT;
private int tokenLength = DEFAULT_TOKEN_LENGTH;
private IRandomizer randomizer;
private IUserManager userManager;
public UserManagerAuthenticator()
{
}
/**
* @since 3.7
*/
public UserManagerAuthenticator(IUserManager userManager)
{
setUserManager(userManager);
}
public String getEncryptionAlgorithmName()
{
return encryptionAlgorithmName;
}
public void setEncryptionAlgorithmName(String encryptionAlgorithmName)
{
checkInactive();
this.encryptionAlgorithmName = encryptionAlgorithmName;
}
public byte[] getEncryptionSaltBytes()
{
return encryptionSaltBytes;
}
public void setEncryptionSaltBytes(byte[] encryptionSaltBytes)
{
checkInactive();
this.encryptionSaltBytes = encryptionSaltBytes;
}
public int getEncryptionIterationCount()
{
return encryptionIterationCount;
}
public void setEncryptionIterationCount(int encryptionIterationCount)
{
checkInactive();
this.encryptionIterationCount = encryptionIterationCount;
}
public int getTokenLength()
{
return tokenLength;
}
public void setTokenLength(int tokenLength)
{
checkInactive();
this.tokenLength = tokenLength;
}
public IRandomizer getRandomizer()
{
return randomizer;
}
public void setRandomizer(IRandomizer randomizer)
{
checkInactive();
this.randomizer = randomizer;
}
public IUserManager getUserManager()
{
return userManager;
}
public void setUserManager(IUserManager userManager)
{
checkInactive();
this.userManager = userManager;
}
public void authenticate(String userID, char[] password) throws SecurityException
{
try
{
byte[] randomToken = createRandomToken();
byte[] cryptedTokenClient = SecurityUtil.encrypt(randomToken, password, encryptionAlgorithmName, encryptionSaltBytes, encryptionIterationCount);
byte[] cryptedTokenServer = userManager.encrypt(userID, randomToken, encryptionAlgorithmName, encryptionSaltBytes, encryptionIterationCount);
if (!Arrays.equals(cryptedTokenClient, cryptedTokenServer))
{
throw new SecurityException("Access denied"); //$NON-NLS-1$
}
}
catch (SecurityException ex)
{
throw ex;
}
catch (Exception ex)
{
Throwable cause = ex.getCause();
if (cause instanceof SecurityException)
{
throw (SecurityException)cause;
}
throw new SecurityException(ex);
}
}
@Override
protected void doBeforeActivate() throws Exception
{
super.doBeforeActivate();
checkState(userManager, "userManager");
}
@Override
protected void doActivate() throws Exception
{
super.doActivate();
if (randomizer == null)
{
randomizer = new Randomizer();
}
LifecycleUtil.activate(randomizer);
}
protected byte[] createRandomToken()
{
byte[] token = new byte[tokenLength];
randomizer.nextBytes(token);
return token;
}
}
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