mirror of
https://codeberg.org/Mercury-IM/Smack
synced 2024-11-05 16:15:58 +01:00
359 lines
11 KiB
Java
359 lines
11 KiB
Java
|
package org.jivesoftware.smack.proxy;
|
||
|
|
|
||
|
|
import java.io.IOException;
|
||
|
|
import java.io.InputStream;
|
||
|
|
import java.io.OutputStream;
|
||
|
|
import java.net.InetAddress;
|
||
|
|
import java.net.Socket;
|
||
|
|
import java.net.UnknownHostException;
|
||
|
|
import javax.net.SocketFactory;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Socket factory for Socks5 proxy
|
||
|
|
*
|
||
|
|
* @author Atul Aggarwal
|
||
|
|
*/
|
||
|
|
public class Socks5ProxySocketFactory
|
||
|
|
extends SocketFactory
|
||
|
|
{
|
||
|
|
private ProxyInfo proxy;
|
||
|
|
|
||
|
|
public Socks5ProxySocketFactory(ProxyInfo proxy)
|
||
|
|
{
|
||
|
|
this.proxy = proxy;
|
||
|
|
}
|
||
|
|
|
||
|
|
public Socket createSocket(String host, int port)
|
||
|
|
throws IOException, UnknownHostException
|
||
|
|
{
|
||
|
|
return socks5ProxifiedSocket(host,port);
|
||
|
|
}
|
||
|
|
|
||
|
|
public Socket createSocket(String host ,int port, InetAddress localHost,
|
||
|
|
int localPort)
|
||
|
|
throws IOException, UnknownHostException
|
||
|
|
{
|
||
|
|
|
||
|
|
return socks5ProxifiedSocket(host,port);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
public Socket createSocket(InetAddress host, int port)
|
||
|
|
throws IOException
|
||
|
|
{
|
||
|
|
|
||
|
|
return socks5ProxifiedSocket(host.getHostAddress(),port);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
public Socket createSocket( InetAddress address, int port,
|
||
|
|
InetAddress localAddress, int localPort)
|
||
|
|
throws IOException
|
||
|
|
{
|
||
|
|
|
||
|
|
return socks5ProxifiedSocket(address.getHostAddress(),port);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
private Socket socks5ProxifiedSocket(String host, int port)
|
||
|
|
throws IOException
|
||
|
|
{
|
||
|
|
Socket socket = null;
|
||
|
|
InputStream in = null;
|
||
|
|
OutputStream out = null;
|
||
|
|
String proxy_host = proxy.getProxyAddress();
|
||
|
|
int proxy_port = proxy.getProxyPort();
|
||
|
|
String user = proxy.getProxyUsername();
|
||
|
|
String passwd = proxy.getProxyPassword();
|
||
|
|
|
||
|
|
try
|
||
|
|
{
|
||
|
|
socket=new Socket(proxy_host, proxy_port);
|
||
|
|
in=socket.getInputStream();
|
||
|
|
out=socket.getOutputStream();
|
||
|
|
|
||
|
|
socket.setTcpNoDelay(true);
|
||
|
|
|
||
|
|
byte[] buf=new byte[1024];
|
||
|
|
int index=0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
+----+----------+----------+
|
||
|
|
|VER | NMETHODS | METHODS |
|
||
|
|
+----+----------+----------+
|
||
|
|
| 1 | 1 | 1 to 255 |
|
||
|
|
+----+----------+----------+
|
||
|
|
|
||
|
|
The VER field is set to X'05' for this version of the protocol. The
|
||
|
|
NMETHODS field contains the number of method identifier octets that
|
||
|
|
appear in the METHODS field.
|
||
|
|
|
||
|
|
The values currently defined for METHOD are:
|
||
|
|
|
||
|
|
o X'00' NO AUTHENTICATION REQUIRED
|
||
|
|
o X'01' GSSAPI
|
||
|
|
o X'02' USERNAME/PASSWORD
|
||
|
|
o X'03' to X'7F' IANA ASSIGNED
|
||
|
|
o X'80' to X'FE' RESERVED FOR PRIVATE METHODS
|
||
|
|
o X'FF' NO ACCEPTABLE METHODS
|
||
|
|
*/
|
||
|
|
|
||
|
|
buf[index++]=5;
|
||
|
|
|
||
|
|
buf[index++]=2;
|
||
|
|
buf[index++]=0; // NO AUTHENTICATION REQUIRED
|
||
|
|
buf[index++]=2; // USERNAME/PASSWORD
|
||
|
|
|
||
|
|
out.write(buf, 0, index);
|
||
|
|
|
||
|
|
/*
|
||
|
|
The server selects from one of the methods given in METHODS, and
|
||
|
|
sends a METHOD selection message:
|
||
|
|
|
||
|
|
+----+--------+
|
||
|
|
|VER | METHOD |
|
||
|
|
+----+--------+
|
||
|
|
| 1 | 1 |
|
||
|
|
+----+--------+
|
||
|
|
*/
|
||
|
|
//in.read(buf, 0, 2);
|
||
|
|
fill(in, buf, 2);
|
||
|
|
|
||
|
|
boolean check=false;
|
||
|
|
switch((buf[1])&0xff)
|
||
|
|
{
|
||
|
|
case 0: // NO AUTHENTICATION REQUIRED
|
||
|
|
check=true;
|
||
|
|
break;
|
||
|
|
case 2: // USERNAME/PASSWORD
|
||
|
|
if(user==null || passwd==null)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Once the SOCKS V5 server has started, and the client has selected the
|
||
|
|
Username/Password Authentication protocol, the Username/Password
|
||
|
|
subnegotiation begins. This begins with the client producing a
|
||
|
|
Username/Password request:
|
||
|
|
|
||
|
|
+----+------+----------+------+----------+
|
||
|
|
|VER | ULEN | UNAME | PLEN | PASSWD |
|
||
|
|
+----+------+----------+------+----------+
|
||
|
|
| 1 | 1 | 1 to 255 | 1 | 1 to 255 |
|
||
|
|
+----+------+----------+------+----------+
|
||
|
|
|
||
|
|
The VER field contains the current version of the subnegotiation,
|
||
|
|
which is X'01'. The ULEN field contains the length of the UNAME field
|
||
|
|
that follows. The UNAME field contains the username as known to the
|
||
|
|
source operating system. The PLEN field contains the length of the
|
||
|
|
PASSWD field that follows. The PASSWD field contains the password
|
||
|
|
association with the given UNAME.
|
||
|
|
*/
|
||
|
|
index=0;
|
||
|
|
buf[index++]=1;
|
||
|
|
buf[index++]=(byte)(user.length());
|
||
|
|
System.arraycopy(user.getBytes(), 0, buf, index,
|
||
|
|
user.length());
|
||
|
|
index+=user.length();
|
||
|
|
buf[index++]=(byte)(passwd.length());
|
||
|
|
System.arraycopy(passwd.getBytes(), 0, buf, index,
|
||
|
|
passwd.length());
|
||
|
|
index+=passwd.length();
|
||
|
|
|
||
|
|
out.write(buf, 0, index);
|
||
|
|
|
||
|
|
/*
|
||
|
|
The server verifies the supplied UNAME and PASSWD, and sends the
|
||
|
|
following response:
|
||
|
|
|
||
|
|
+----+--------+
|
||
|
|
|VER | STATUS |
|
||
|
|
+----+--------+
|
||
|
|
| 1 | 1 |
|
||
|
|
+----+--------+
|
||
|
|
|
||
|
|
A STATUS field of X'00' indicates success. If the server returns a
|
||
|
|
`failure' (STATUS value other than X'00') status, it MUST close the
|
||
|
|
connection.
|
||
|
|
*/
|
||
|
|
//in.read(buf, 0, 2);
|
||
|
|
fill(in, buf, 2);
|
||
|
|
if(buf[1]==0)
|
||
|
|
{
|
||
|
|
check=true;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!check)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
socket.close();
|
||
|
|
}
|
||
|
|
catch(Exception eee)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,
|
||
|
|
"fail in SOCKS5 proxy");
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
The SOCKS request is formed as follows:
|
||
|
|
|
||
|
|
+----+-----+-------+------+----------+----------+
|
||
|
|
|VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT |
|
||
|
|
+----+-----+-------+------+----------+----------+
|
||
|
|
| 1 | 1 | X'00' | 1 | Variable | 2 |
|
||
|
|
+----+-----+-------+------+----------+----------+
|
||
|
|
|
||
|
|
Where:
|
||
|
|
|
||
|
|
o VER protocol version: X'05'
|
||
|
|
o CMD
|
||
|
|
o CONNECT X'01'
|
||
|
|
o BIND X'02'
|
||
|
|
o UDP ASSOCIATE X'03'
|
||
|
|
o RSV RESERVED
|
||
|
|
o ATYP address type of following address
|
||
|
|
o IP V4 address: X'01'
|
||
|
|
o DOMAINNAME: X'03'
|
||
|
|
o IP V6 address: X'04'
|
||
|
|
o DST.ADDR desired destination address
|
||
|
|
o DST.PORT desired destination port in network octet
|
||
|
|
order
|
||
|
|
*/
|
||
|
|
|
||
|
|
index=0;
|
||
|
|
buf[index++]=5;
|
||
|
|
buf[index++]=1; // CONNECT
|
||
|
|
buf[index++]=0;
|
||
|
|
|
||
|
|
byte[] hostb=host.getBytes();
|
||
|
|
int len=hostb.length;
|
||
|
|
buf[index++]=3; // DOMAINNAME
|
||
|
|
buf[index++]=(byte)(len);
|
||
|
|
System.arraycopy(hostb, 0, buf, index, len);
|
||
|
|
index+=len;
|
||
|
|
buf[index++]=(byte)(port>>>8);
|
||
|
|
buf[index++]=(byte)(port&0xff);
|
||
|
|
|
||
|
|
out.write(buf, 0, index);
|
||
|
|
|
||
|
|
/*
|
||
|
|
The SOCKS request information is sent by the client as soon as it has
|
||
|
|
established a connection to the SOCKS server, and completed the
|
||
|
|
authentication negotiations. The server evaluates the request, and
|
||
|
|
returns a reply formed as follows:
|
||
|
|
|
||
|
|
+----+-----+-------+------+----------+----------+
|
||
|
|
|VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
|
||
|
|
+----+-----+-------+------+----------+----------+
|
||
|
|
| 1 | 1 | X'00' | 1 | Variable | 2 |
|
||
|
|
+----+-----+-------+------+----------+----------+
|
||
|
|
|
||
|
|
Where:
|
||
|
|
|
||
|
|
o VER protocol version: X'05'
|
||
|
|
o REP Reply field:
|
||
|
|
o X'00' succeeded
|
||
|
|
o X'01' general SOCKS server failure
|
||
|
|
o X'02' connection not allowed by ruleset
|
||
|
|
o X'03' Network unreachable
|
||
|
|
o X'04' Host unreachable
|
||
|
|
o X'05' Connection refused
|
||
|
|
o X'06' TTL expired
|
||
|
|
o X'07' Command not supported
|
||
|
|
o X'08' Address type not supported
|
||
|
|
o X'09' to X'FF' unassigned
|
||
|
|
o RSV RESERVED
|
||
|
|
o ATYP address type of following address
|
||
|
|
o IP V4 address: X'01'
|
||
|
|
o DOMAINNAME: X'03'
|
||
|
|
o IP V6 address: X'04'
|
||
|
|
o BND.ADDR server bound address
|
||
|
|
o BND.PORT server bound port in network octet order
|
||
|
|
*/
|
||
|
|
|
||
|
|
//in.read(buf, 0, 4);
|
||
|
|
fill(in, buf, 4);
|
||
|
|
|
||
|
|
if(buf[1]!=0)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
socket.close();
|
||
|
|
}
|
||
|
|
catch(Exception eee)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,
|
||
|
|
"server returns "+buf[1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
switch(buf[3]&0xff)
|
||
|
|
{
|
||
|
|
case 1:
|
||
|
|
//in.read(buf, 0, 6);
|
||
|
|
fill(in, buf, 6);
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
//in.read(buf, 0, 1);
|
||
|
|
fill(in, buf, 1);
|
||
|
|
//in.read(buf, 0, buf[0]+2);
|
||
|
|
fill(in, buf, (buf[0]&0xff)+2);
|
||
|
|
break;
|
||
|
|
case 4:
|
||
|
|
//in.read(buf, 0, 18);
|
||
|
|
fill(in, buf, 18);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
}
|
||
|
|
return socket;
|
||
|
|
|
||
|
|
}
|
||
|
|
catch(RuntimeException e)
|
||
|
|
{
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
catch(Exception e)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
if(socket!=null)
|
||
|
|
{
|
||
|
|
socket.close();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
catch(Exception eee)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
String message="ProxySOCKS5: "+e.toString();
|
||
|
|
if(e instanceof Throwable)
|
||
|
|
{
|
||
|
|
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5,message,
|
||
|
|
(Throwable)e);
|
||
|
|
}
|
||
|
|
throw new IOException(message);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void fill(InputStream in, byte[] buf, int len)
|
||
|
|
throws IOException
|
||
|
|
{
|
||
|
|
int s=0;
|
||
|
|
while(s<len)
|
||
|
|
{
|
||
|
|
int i=in.read(buf, s, len-s);
|
||
|
|
if(i<=0)
|
||
|
|
{
|
||
|
|
throw new ProxyException(ProxyInfo.ProxyType.SOCKS5, "stream " +
|
||
|
|
"is closed");
|
||
|
|
}
|
||
|
|
s+=i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|