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annotate src/net/sourceforge/jsocks/server/UserPasswordAuthenticator.java @ 391:bcbd579253a1

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author Carl Byington <carl@five-ten-sg.com>
date Tue, 16 Sep 2014 11:12:45 -0700
parents 72de889ecfe7
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1 package net.sourceforge.jsocks.server;
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2
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3 import net.sourceforge.jsocks.ProxyMessage;
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4 import java.io.IOException;
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5 import java.io.InputStream;
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6 import java.io.OutputStream;
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7 import java.net.Socket;
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8
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9 /**
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10 This class implements SOCKS5 User/Password authentication scheme as
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11 defined in rfc1929,the server side of it.
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12 */
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13 public class UserPasswordAuthenticator extends ServerAuthenticatorNone{
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14
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15 static final int METHOD_ID = 2;
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16
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17 UserValidation validator;
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18
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19 /**
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20 Construct a new UserPasswordAuthentication object, with given
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21 UserVlaidation scheme.
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22
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23 @param v UserValidation to use for validating users.
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24 */
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25 public UserPasswordAuthenticator(UserValidation validator){
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26 this.validator = validator;
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27 }
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28
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29 public ServerAuthenticator startSession(Socket s) throws IOException{
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30 InputStream in = s.getInputStream();
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31 OutputStream out = s.getOutputStream();
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32
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33 if(in.read() != 5) return null; //Drop non version 5 messages.
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34
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35 if(!selectSocks5Authentication(in,out,METHOD_ID))
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36 return null;
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37 if(!doUserPasswordAuthentication(s,in,out))
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38 return null;
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39
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40 return new ServerAuthenticatorNone(in,out);
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41 }
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42
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43
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44 //Private Methods
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45 //////////////////
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46
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47 private boolean doUserPasswordAuthentication(Socket s,
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48 InputStream in,
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49 OutputStream out)
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50 throws IOException{
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51 int version = in.read();
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52 if(version != 1) return false;
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53 int ulen = in.read();
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54 if(ulen < 0) return false;
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55 byte[] user = new byte[ulen];
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56 in.read(user);
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57 int plen = in.read();
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58 if(plen < 0) return false;
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59 byte[] password = new byte[plen];
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60 in.read(password);
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61
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62 if(validator.isUserValid(new String(user), new String(password),s)){
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63 //System.out.println("user valid");
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64 out.write(new byte[]{1,0});
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65 }else{
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66 //System.out.println("user invalid");
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67 out.write(new byte[]{1,1});
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68 return false;
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69 }
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70
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71 return true;
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72 }
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73 }