/*
 * Created on 17-Jun-2004
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program 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.
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.pluginsimpl.local.utils.security;

import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.net.URL;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.SSLSocketFactory;

import org.gudy.azureus2.core3.util.SHA1Hasher;

/**
 * @author parg
 *
 */

import org.gudy.azureus2.core3.security.*;
import org.gudy.azureus2.plugins.messaging.generic.GenericMessageConnection;
import org.gudy.azureus2.plugins.utils.security.CertificateListener;
import org.gudy.azureus2.plugins.utils.security.PasswordListener;
import org.gudy.azureus2.plugins.utils.security.SEPublicKey;
import org.gudy.azureus2.plugins.utils.security.SEPublicKeyLocator;
import org.gudy.azureus2.pluginsimpl.local.messaging.GenericMessageConnectionImpl;

import com.aelitis.azureus.core.AzureusCore;


public class 
SESecurityManagerImpl 
	implements org.gudy.azureus2.plugins.utils.security.SESecurityManager
{
	private AzureusCore	core;
	
	private Map	password_listeners		= new HashMap();
	private Map	certificate_listeners	= new HashMap();
	
	public
	SESecurityManagerImpl(
		AzureusCore		_core )
	{
		core	= _core;
	}
	
	public byte[]
	calculateSHA1(
		byte[]		data_in )
	{
		if (data_in == null ){
			
			data_in = new byte[0];
		}
		
        SHA1Hasher hasher = new SHA1Hasher();
        
        return( hasher.calculateHash(data_in));	
	}
	
	public void
	runWithAuthenticator(
		Authenticator	authenticator,
		Runnable		target )
	{
		try{
			Authenticator.setDefault( authenticator );
			
			target.run();
			
		}finally{
			
			SESecurityManager.installAuthenticator();
		}
	}
	
	public void
	addPasswordListener(
		final PasswordListener	listener )
	{
		SEPasswordListener	sepl = 
			new SEPasswordListener()
			{
				public PasswordAuthentication
				getAuthentication(
					String		realm,
					URL			tracker )
				{
					return( listener.getAuthentication( realm, tracker ));
				}
				
				public void
				setAuthenticationOutcome(
					String		realm,
					URL			tracker,
					boolean		success )
				{
					listener.setAuthenticationOutcome( realm, tracker, success );
				}
				
				public void
				clearPasswords()
				{
				}
			};
			
		password_listeners.put( listener, sepl );
		
		SESecurityManager.addPasswordListener( sepl );
	}
		
	public void
	removePasswordListener(
		PasswordListener	listener )
	{
		SEPasswordListener	sepl = (SEPasswordListener)password_listeners.get( listener );
		
		if ( sepl != null ){
			
			SESecurityManager.removePasswordListener( sepl );
		}
	}
	
	public void
	addCertificateListener(
		final CertificateListener	listener )
	{
		SECertificateListener	sepl = 
			new SECertificateListener()
			{
			public boolean
			trustCertificate(
				String			resource,
				X509Certificate	cert )
			{
				return( listener.trustCertificate( resource, cert ));
			}
			};
			
		certificate_listeners.put( listener, sepl );
		
		SESecurityManager.addCertificateListener( sepl );
	}
		
	public void
	removeCertificateListener(
			CertificateListener	listener )
	{
		SECertificateListener	sepl = (SECertificateListener)certificate_listeners.get( listener );
		
		if ( sepl != null ){
			
			SESecurityManager.removeCertificateListener( sepl );
		}
	}
	
	public SSLSocketFactory
	installServerCertificate(
		URL		url )
	{
		return( SESecurityManager.installServerCertificates( url ));
	}
	
	public KeyStore
	getKeyStore()
	
		throws Exception
	{
		return( SESecurityManager.getKeyStore());
	}
	
	public KeyStore
	getTrustStore()
	
		throws Exception
	{
		return( SESecurityManager.getTrustStore());
	}
	
	
	public Certificate
	createSelfSignedCertificate(
		String		alias,
		String		cert_dn,
		int			strength )
	
		throws Exception
	{
		return( SESecurityManager.createSelfSignedCertificate(alias, cert_dn, strength ));		
	}
	
	public byte[]
	getIdentity()
	{
		return( core.getCryptoManager().getSecureID());
	}
	
	public SEPublicKey
	getPublicKey(
		int		key_type,
		String	reason_resource )
	
		throws Exception
	{
		byte[]	encoded = core.getCryptoManager().getECCHandler().getPublicKey( reason_resource );
		 
		return( new SEPublicKeyImpl( key_type, encoded ));
	}
	
	public SEPublicKey
	decodePublicKey(
		byte[]	encoded )
	{
		return( SEPublicKeyImpl.decode( encoded ));
	}
	
	public GenericMessageConnection
	getSTSConnection(
		GenericMessageConnection	connection,
		SEPublicKey					my_public_key,
		SEPublicKeyLocator			key_locator,
		String						reason_resource,
		int							block_crypto )
	
		throws Exception
	{
		return( new SESTSConnectionImpl( core, (GenericMessageConnectionImpl)connection, my_public_key, key_locator, reason_resource, block_crypto ));
	}
}
