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1
2
29
30 package com.jcraft.jsch;
31
32 import java.net.*;
33
34 class ChannelX11 extends Channel{
35
36 static private final int LOCAL_WINDOW_SIZE_MAX=0x20000;
37 static private final int LOCAL_MAXIMUM_PACKET_SIZE=0x4000;
38
39 static private final int TIMEOUT=10*1000;
40
41 private static String  host="127.0.0.1";
42 private static int port=6000;
43
44 private boolean init=true;
45
46 static byte[] cookie=null;
47 private static byte[] cookie_hex=null;
48
49 private static java.util.Hashtable faked_cookie_pool=new java.util.Hashtable ();
50 private static java.util.Hashtable faked_cookie_hex_pool=new java.util.Hashtable ();
51
52 private static byte[] table={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,
53 0x61,0x62,0x63,0x64,0x65,0x66};
54
55 private Socket socket = null;
56
57 static int revtable(byte foo){
58 for(int i=0; i<table.length; i++){
59 if(table[i]==foo)return i;
60 }
61 return 0;
62 }
63 static void setCookie(String foo){
64 cookie_hex=foo.getBytes();
65 cookie=new byte[16];
66 for(int i=0; i<16; i++){
67 cookie[i]=(byte)(((revtable(cookie_hex[i*2])<<4)&0xf0) |
68 ((revtable(cookie_hex[i*2+1]))&0xf));
69 }
70 }
71 static void setHost(String foo){ host=foo; }
72 static void setPort(int foo){ port=foo; }
73 static byte[] getFakedCookie(Session session){
74 synchronized(faked_cookie_hex_pool){
75 byte[] foo=(byte[])faked_cookie_hex_pool.get(session);
76 if(foo==null){
77 Random random=Session.random;
78 foo=new byte[16];
79 synchronized(random){
80 random.fill(foo, 0, 16);
81 }
82
89 faked_cookie_pool.put(session, foo);
90 byte[] bar=new byte[32];
91 for(int i=0; i<16; i++){
92 bar[2*i]=table[(foo[i]>>>4)&0xf];
93 bar[2*i+1]=table[(foo[i])&0xf];
94 }
95 faked_cookie_hex_pool.put(session, bar);
96 foo=bar;
97 }
98 return foo;
99 }
100 }
101
102 ChannelX11(){
103 super();
104
105 setLocalWindowSizeMax(LOCAL_WINDOW_SIZE_MAX);
106 setLocalWindowSize(LOCAL_WINDOW_SIZE_MAX);
107 setLocalPacketSize(LOCAL_MAXIMUM_PACKET_SIZE);
108
109 type="x11".getBytes();
110
111 connected=true;
112
124 }
125
126 public void run(){
127
128 try{
129 socket=Util.createSocket(host, port, TIMEOUT);
130 socket.setTcpNoDelay(true);
131 io=new IO();
132 io.setInputStream(socket.getInputStream());
133 io.setOutputStream(socket.getOutputStream());
134 sendOpenConfirmation();
135 }
136 catch(Exception e){
137 sendOpenFailure(SSH_OPEN_ADMINISTRATIVELY_PROHIBITED);
138 close=true;
139 disconnect();
140 return;
141 }
142
143 thread=Thread.currentThread();
144 Buffer buf=new Buffer(rmpsize);
145 Packet packet=new Packet(buf);
146 int i=0;
147 try{
148 while(thread!=null &&
149 io!=null &&
150 io.in!=null){
151 i=io.in.read(buf.buffer,
152 14,
153 buf.buffer.length-14
154 -32 -20 );
156 if(i<=0){
157 eof();
158 break;
159 }
160 if(close)break;
161 packet.reset();
162 buf.putByte((byte)Session.SSH_MSG_CHANNEL_DATA);
163 buf.putInt(recipient);
164 buf.putInt(i);
165 buf.skip(i);
166 session.write(packet, this, i);
167 }
168 }
169 catch(Exception e){
170 }
172 disconnect();
173 }
174
175 private byte[] cache=new byte[0];
176 private byte[] addCache(byte[] foo, int s, int l){
177 byte[] bar=new byte[cache.length+l];
178 System.arraycopy(foo, s, bar, cache.length, l);
179 if(cache.length>0)
180 System.arraycopy(cache, 0, bar, 0, cache.length);
181 cache=bar;
182 return cache;
183 }
184
185 void write(byte[] foo, int s, int l) throws java.io.IOException {
186
188 if(init){
189
190 foo=addCache(foo, s, l);
191 s=0;
192 l=foo.length;
193
194 if(l<9)
195 return;
196
197 int plen=(foo[s+6]&0xff)*256+(foo[s+7]&0xff);
198 int dlen=(foo[s+8]&0xff)*256+(foo[s+9]&0xff);
199
200 if((foo[s]&0xff)==0x42){
201 }
202 else if((foo[s]&0xff)==0x6c){
203 plen=((plen>>>8)&0xff)|((plen<<8)&0xff00);
204 dlen=((dlen>>>8)&0xff)|((dlen<<8)&0xff00);
205 }
206 else{
207 }
209
210 if(l<12+plen+((-plen)&3)+dlen)
211 return;
212
213 byte[] bar=new byte[dlen];
214 System.arraycopy(foo, s+12+plen+((-plen)&3), bar, 0, dlen);
215 byte[] faked_cookie=null;
216
217 synchronized(faked_cookie_pool){
218 faked_cookie=(byte[])faked_cookie_pool.get(session);
219 }
220
221
233
234 if(equals(bar, faked_cookie)){
235 if(cookie!=null)
236 System.arraycopy(cookie, 0, foo, s+12+plen+((-plen)&3), dlen);
237 }
238 else{
239 thread=null;
241 eof();
242 io.close();
243 disconnect();
244 }
245 init=false;
246 io.put(foo, s, l);
247 cache=null;
248 return;
249 }
250 io.put(foo, s, l);
251 }
252
253 private static boolean equals(byte[] foo, byte[] bar){
254 if(foo.length!=bar.length)return false;
255 for(int i=0; i<foo.length; i++){
256 if(foo[i]!=bar[i])return false;
257 }
258 return true;
259 }
260 }
261 |
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