package net.sourceforge.jsocks.socks; /** SOCKS5 User Password authentication scheme. */ public class UserPasswordAuthentication implements Authentication{ /**SOCKS ID for User/Password authentication method*/ public final static int METHOD_ID = 2; String userName, password; byte[] request; /** Create an instance of UserPasswordAuthentication. @param userName User Name to send to SOCKS server. @param password Password to send to SOCKS server. */ public UserPasswordAuthentication(String userName,String password){ this.userName = userName; this.password = password; formRequest(); } /** Get the user name. @return User name. */ public String getUser(){ return userName; } /** Get password @return Password */ public String getPassword(){ return password; } /** Does User/Password authentication as defined in rfc1929. @return An array containnig in, out streams, or null if authentication fails. */ public Object[] doSocksAuthentication(int methodId, java.net.Socket proxySocket) throws java.io.IOException{ if(methodId != METHOD_ID) return null; java.io.InputStream in = proxySocket.getInputStream(); java.io.OutputStream out = proxySocket.getOutputStream(); out.write(request); int version = in.read(); if(version < 0) return null; //Server closed connection int status = in.read(); if(status != 0) return null; //Server closed connection, or auth failed. return new Object[] {in,out}; } //Private methods ////////////////// /** Convert UserName password in to binary form, ready to be send to server*/ private void formRequest(){ byte[] user_bytes = userName.getBytes(); byte[] password_bytes = password.getBytes(); request = new byte[3+user_bytes.length+password_bytes.length]; request[0] = (byte) 1; request[1] = (byte) user_bytes.length; System.arraycopy(user_bytes,0,request,2,user_bytes.length); request[2+user_bytes.length] = (byte) password_bytes.length; System.arraycopy(password_bytes,0, request,3+user_bytes.length,password_bytes.length); } }