cryptohandlerecc.java

这是一个基于java编写的torrent的P2P源码

/*
 * Created on 15 Jun 2006
 * Created by Paul Gardner
 * Copyright (C) 2006 Aelitis, 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.
 * 
 * AELITIS, SAS au capital de 46,603.30 euros
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 *
 */

package com.aelitis.azureus.core.security.impl;

import java.math.BigInteger;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Signature;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;

import org.bouncycastle.jce.ECNamedCurveTable;
import org.bouncycastle.jce.interfaces.ECPrivateKey;
import org.bouncycastle.jce.interfaces.ECPublicKey;
import org.bouncycastle.jce.provider.JCEIESCipher;
import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec;
import org.bouncycastle.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
import org.bouncycastle.jce.spec.IEKeySpec;
import org.bouncycastle.jce.spec.IESParameterSpec;
import org.bouncycastle.math.ec.ECPoint;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.util.SystemTime;

import com.aelitis.azureus.core.security.CryptoHandler;
import com.aelitis.azureus.core.security.CryptoManager;
import com.aelitis.azureus.core.security.CryptoManagerException;
import com.aelitis.azureus.core.security.CryptoManagerPasswordException;
import com.aelitis.azureus.core.security.CryptoManagerPasswordHandler;
import com.aelitis.azureus.core.security.CryptoSTSEngine;

public class 
CryptoHandlerECC
	implements CryptoHandler
{
	private static final ECNamedCurveParameterSpec ECCparam = ECNamedCurveTable.getParameterSpec("prime192v2");

	private static final byte[]  ECIES_D = new byte[] {(byte)0x6d, (byte)0xc1, (byte)0x62, (byte)0x32, (byte)0x15, (byte)0x4d, (byte)0x0f, (byte)0x7b }; 
	private static final byte[]  ECIES_E = new byte[] {(byte)0x6a, (byte)0x64, (byte)0x98, (byte)0xde, (byte)0x1a, (byte)0xa4, (byte)0x98, (byte)0xcc }; 

	private static final int	TIMEOUT_DEFAULT_SECS		= 60*60;

	
	private CryptoManagerImpl		manager;
	
	private String					CONFIG_PREFIX = "core.crypto.ecc.";

	private PrivateKey			use_method_private_key;
	private PublicKey			use_method_public_key;
	
	private long	last_unlock_time;
	
	protected
	CryptoHandlerECC(
		CryptoManagerImpl		_manager,
		int						_instance_id )
	{
		manager	= _manager;
		
		CONFIG_PREFIX += _instance_id + ".";
	}
	
	public void
	unlock(
		char[]		password )
	
		throws CryptoManagerException
	{
		getMyPrivateKey( password, "" );
	}
	
	public synchronized void
	lock()
	{
		use_method_private_key	= null;
	}
	
	public int
	getUnlockTimeoutSeconds()
	{
		return( COConfigurationManager.getIntParameter( CONFIG_PREFIX + "timeout", TIMEOUT_DEFAULT_SECS ));
	}
	
	public void
	setUnlockTimeoutSeconds(
		int		secs )
	{
		COConfigurationManager.setParameter( CONFIG_PREFIX + "timeout", secs );
	}
	
	public byte[]
	sign(
		byte[]		data,
		char[]		password )
	
		throws CryptoManagerException
	{
		return( sign( data, password, null ));
	}
	
	public byte[]
	sign(
		byte[]		data,
		String		reason )
	
		throws CryptoManagerException
	{
		return( sign( data, null, reason ));
	}
	
	protected byte[]
	sign(
		byte[]		data,
		char[]		password,
		String		reason )
	
		throws CryptoManagerException
	{
		PrivateKey	priv = getMyPrivateKey( password, reason );
		
		Signature sig = getSignature( priv );
		
		try{
			sig.update( data );
			
			return( sig.sign());
			
		}catch( Throwable e ){
			
			throw( new CryptoManagerException( "Signature failed", e ));
		}
	}
	 
	public boolean
	verify(
		byte[]		public_key,
		byte[]		data,
		byte[]		signature )
	
		throws CryptoManagerException
	{
		PublicKey	pub = rawdataToPubkey( public_key );
		
		Signature sig = getSignature( pub );
		
		try{
			sig.update( data );
			
			return( sig.verify( signature ));
			
		}catch( Throwable e ){
			
			throw( new CryptoManagerException( "Signature failed", e ));
		}
	}
	
	public byte[]
    encrypt(
		byte[]		other_public_key,
		byte[]		data,
		char[]		password )
		
		throws CryptoManagerException
	{
		return( encrypt( other_public_key, data, password, null ));
	}
	public byte[]
    encrypt(
		byte[]		other_public_key,
		byte[]		data,
		String		reason )
		
		throws CryptoManagerException
	{
		return( encrypt( other_public_key, data, null, reason ));
	}
	
	protected byte[]
	encrypt(
		byte[]		other_public_key,
		byte[]		data,
		char[]		password,
		String		reason )
		
		throws CryptoManagerException
	{	        
		try{
			IEKeySpec   key_spec = new IEKeySpec( getMyPrivateKey( password, reason ), rawdataToPubkey( other_public_key ));
	 
			IESParameterSpec param = new IESParameterSpec(ECIES_D, ECIES_E, 128);
		
			InternalECIES	cipher = new InternalECIES();
	
			cipher.internalEngineInit( Cipher.ENCRYPT_MODE, key_spec, param, null ); 
		
			return( cipher.internalEngineDoFinal(data, 0, data.length ));
			
		}catch( CryptoManagerException e ){
			
			throw( e );
			
		}catch( Throwable e){
			
			throw( new CryptoManagerException( "Encrypt failed", e ));
		}
	}
	
	public byte[]
	decrypt(
		byte[]		other_public_key,
		byte[]		data,
		char[]		password )
		
		throws CryptoManagerException
	{
		return( decrypt( other_public_key, data, password, null ));
	}
	   
	public byte[]
	decrypt(
		byte[]		other_public_key,
		byte[]		data,
		String		reason )
		
		throws CryptoManagerException
	{
		return( decrypt( other_public_key, data, null, reason ));
	}
	
	protected byte[]
	decrypt(
		byte[]		other_public_key,
		byte[]		data,
		char[]		password,
		String		reason )
		
		throws CryptoManagerException
	{	        
		try{
			IEKeySpec   key_spec = new IEKeySpec( getMyPrivateKey( password, reason ), rawdataToPubkey( other_public_key ));
	 	
			IESParameterSpec param = new IESParameterSpec(ECIES_D, ECIES_E, 128);
		
			InternalECIES	cipher = new InternalECIES();
	
			cipher.internalEngineInit( Cipher.DECRYPT_MODE, key_spec, param, null ); 
		
			return( cipher.internalEngineDoFinal(data, 0, data.length ));
			
		}catch( CryptoManagerException e ){
			
			throw( e );
			
		}catch( Throwable e){
			
			throw( new CryptoManagerException( "Decrypt failed", e ));
		}
	}
	
	public CryptoSTSEngine
	getSTSEngine(
		char[]		password )
	
		throws CryptoManagerException
	{
		return( getSTSEngine( password, null ));
	}
	
	public CryptoSTSEngine
	getSTSEngine(
		String		reason )
	
		throws CryptoManagerException
	{
		return( getSTSEngine( null, reason ));
	}
	
	protected CryptoSTSEngine
	getSTSEngine(
		char[]		password,
		String		reason )
	
		throws CryptoManagerException
	{
		return( new CryptoSTSEngineImpl( this, getMyPublicKey( password, reason ), getMyPrivateKey( password, reason )));
	}
	
	public byte[]
	getPublicKey(
		char[]		password )
	
		throws CryptoManagerException
	{
		return( keyToRawdata( getMyPublicKey( password, null )));
	}
	
	public byte[]
	getPublicKey(
		String		reason )
	
		throws CryptoManagerException
	{
		return( keyToRawdata( getMyPublicKey( null, reason )));
	}
	
	protected byte[]
	getPublicKey(
		char[]		password,
		String		reason )
	
		throws CryptoManagerException
	{
		return( keyToRawdata( getMyPublicKey( password, reason )));
	}

	public byte[]
   	getEncryptedPrivateKey(
   		char[]		password )
	
		throws CryptoManagerException
	{
		return( getEncryptedPrivateKey( password, null ));
	}
	
	public byte[]
   	getEncryptedPrivateKey(
   		String		reason )
	
		throws CryptoManagerException
	{
		return( getEncryptedPrivateKey( null, reason ));
	}
  
	protected byte[]
	getEncryptedPrivateKey(
		char[]		password,
		String		reason )
	
		throws CryptoManagerException
	{
		getMyPrivateKey( password, reason );