1 | //
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2 | // Copyright (C) 1997, 1998 Olivetti & Oracle Research Laboratory
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3 | //
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4 | // This is free software; you can redistribute it and/or modify
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5 | // it under the terms of the GNU General Public License as published by
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6 | // the Free Software Foundation; either version 2 of the License, or
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7 | // (at your option) any later version.
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8 | //
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9 | // This software is distributed in the hope that it will be useful,
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10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 | // GNU General Public License for more details.
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13 | //
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14 | // You should have received a copy of the GNU General Public License
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15 | // along with this software; if not, write to the Free Software
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16 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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17 | // USA.
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18 | //
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19 |
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20 | //
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21 | // MindVNC.java - the VNC viewer class. This class mainly just sets up the
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22 | // user interface, leaving it to the vncCanvas to do the actual rendering of
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23 | // a VNC desktop.
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24 | //
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25 | package mindbright.application;
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26 |
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27 | import java.awt.*;
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28 | import java.awt.event.*;
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29 | import java.io.*;
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30 |
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31 | import mindbright.ssh.*;
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32 | import mindbright.vnc.*;
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33 |
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34 | public class MindVNC extends java.applet.Applet
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35 | implements java.lang.Runnable
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36 | {
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37 | boolean inAnApplet = true;
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38 | boolean separateFrame;
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39 |
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40 | Container cont;
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41 |
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42 | //
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43 | // main() is called when run as a java program from the command line. It
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44 | // simply creates a frame and runs the applet inside it.
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45 | //
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46 |
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47 | public static void main(String[] argv) {
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48 | MindVNC v = new MindVNC();
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49 | v.mainArgs = argv;
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50 | v.inAnApplet = false;
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51 |
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52 | v.f = new Frame("MindVNC v0.1");
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53 | v.f.add("Center", v);
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54 |
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55 | v.init();
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56 | v.start();
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57 | }
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58 |
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59 | Frame f;
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60 | String[] mainArgs;
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61 |
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62 | String sshHost;
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63 | int sshPort;
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64 | String vncHost;
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65 | int vncPort;
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66 | String sshUser;
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67 | String sshPasswd;
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68 |
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69 | ScrollPane sp;
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70 | vncCanvas vc;
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71 | public rfbProto rfb;
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72 | Thread rfbThread;
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73 | GridBagLayout gridbag;
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74 | Panel buttonPanel;
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75 | Button disconnectButton;
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76 | Button optionsButton;
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77 | Button clipboardButton;
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78 | Button ctrlAltDelButton;
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79 | authenticationPanel authenticator;
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80 |
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81 | public optionsFrame options;
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82 | public clipboardFrame clipboard;
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83 |
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84 | //
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85 | // init()
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86 | //
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87 |
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88 | public void init() {
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89 |
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90 | readParameters();
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91 |
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92 | if(inAnApplet && separateFrame)
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93 | cont = f = new Frame("MindVNC v0.1");
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94 | else
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95 | cont = this;
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96 |
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97 | if(f != null) {
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98 | f.addWindowListener(new WindowAdapter() {
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99 | public void windowClosing(WindowEvent e) { f.dispose(); rfbThread.stop();
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100 | if(!inAnApplet) System.exit(1); }
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101 | });
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102 | }
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103 |
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104 |
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105 | options = new optionsFrame(this);
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106 | clipboard = new clipboardFrame(this);
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107 | authenticator = new authenticationPanel();
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108 |
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109 | rfbThread = new Thread(this);
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110 | rfbThread.start();
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111 | }
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112 |
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113 | public void update(Graphics g) {
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114 | }
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115 |
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116 | //
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117 | // run() - executed by the rfbThread to deal with the RFB socket.
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118 | //
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119 |
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120 | public void run() {
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121 |
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122 | gridbag = new GridBagLayout();
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123 | cont.setLayout(gridbag);
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124 |
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125 | buttonPanel = new Panel();
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126 | buttonPanel.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
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127 | disconnectButton = new Button("Disconnect");
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128 | buttonPanel.add(disconnectButton);
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129 | optionsButton = new Button("Options");
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130 | buttonPanel.add(optionsButton);
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131 | clipboardButton = new Button("Clipboard");
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132 | buttonPanel.add(clipboardButton);
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133 | ctrlAltDelButton = new Button("Send Ctrl-Alt-Del");
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134 | buttonPanel.add(ctrlAltDelButton);
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135 |
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136 | GridBagConstraints gbc = new GridBagConstraints();
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137 | gbc.gridwidth = GridBagConstraints.REMAINDER;
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138 | gbc.anchor = GridBagConstraints.NORTHWEST;
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139 | gridbag.setConstraints(buttonPanel,gbc);
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140 | cont.add(buttonPanel);
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141 |
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142 | disconnectButton.addActionListener(new ActionListener() {
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143 | public void actionPerformed(ActionEvent e) {
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144 | buttonPressed(0);
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145 | }
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146 | });
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147 | optionsButton.addActionListener(new ActionListener() {
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148 | public void actionPerformed(ActionEvent e) {
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149 | buttonPressed(1);
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150 | }
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151 | });
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152 | clipboardButton.addActionListener(new ActionListener() {
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153 | public void actionPerformed(ActionEvent e) {
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154 | buttonPressed(2);
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155 | }
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156 | });
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157 | ctrlAltDelButton.addActionListener(new ActionListener() {
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158 | public void actionPerformed(ActionEvent e) {
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159 | buttonPressed(3);
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160 | }
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161 | });
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162 |
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163 |
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164 | while(true) {
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165 |
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166 | disconnectButton.disable();
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167 | clipboardButton.disable();
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168 | ctrlAltDelButton.disable();
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169 |
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170 | try {
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171 | connectAndAuthenticate();
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172 |
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173 | rfb.doProtocolInitialisation(options.encodings, options.nEncodings);
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174 |
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175 | vc = new vncCanvas(this);
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176 |
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177 | sp = new ScrollPane(ScrollPane.SCROLLBARS_AS_NEEDED);
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178 | gbc.weightx = 1.0;
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179 | gbc.weighty = 1.0;
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180 | gbc.fill = GridBagConstraints.BOTH;
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181 | gridbag.setConstraints(sp,gbc);
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182 | cont.add(sp);
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183 |
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184 | if(f != null) {
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185 | int sbw = sp.getVScrollbarWidth();
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186 | int sbh = sp.getHScrollbarHeight();
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187 | Dimension max = Toolkit.getDefaultToolkit().getScreenSize();
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188 | Insets fIns = f.getInsets();
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189 | max.width -= (fIns.left + fIns.right + sbw);
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190 | max.height -= (fIns.top + fIns.bottom + sbh);
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191 | int w = max.width > rfb.framebufferWidth + 4 ? rfb.framebufferWidth + 4 : max.width;
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192 | int h = max.height > rfb.framebufferHeight + 4 ? rfb.framebufferHeight + 4 : max.height;
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193 | sp.setSize(new Dimension(w, h));
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194 | } else {
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195 | sp.setSize(getSize());
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196 | }
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197 | sp.add(vc);
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198 |
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199 | if(f != null) {
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200 | f.setTitle(rfb.desktopName);
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201 | f.pack();
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202 | } else {
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203 | validate();
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204 | }
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205 |
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206 | disconnectButton.enable();
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207 | clipboardButton.enable();
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208 | ctrlAltDelButton.enable();
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209 |
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210 | vc.processNormalProtocol();
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211 | cont.remove(sp);
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212 |
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213 | } catch (Exception e) {
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214 | e.printStackTrace();
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215 | fatalError(e.toString());
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216 | }
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217 | }
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218 | }
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219 |
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220 |
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221 | //
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222 | // Connect to the RFB server and authenticate the user.
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223 | //
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224 |
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225 | void connectAndAuthenticate() throws IOException {
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226 |
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227 | GridBagConstraints gbc = new GridBagConstraints();
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228 | gbc.gridwidth = GridBagConstraints.REMAINDER;
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229 | gbc.anchor = GridBagConstraints.NORTHWEST;
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230 | gbc.weightx = 1.0;
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231 | gbc.weighty = 1.0;
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232 | gbc.ipadx = 100;
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233 | gbc.ipady = 50;
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234 | gridbag.setConstraints(authenticator,gbc);
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235 | cont.add(authenticator);
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236 |
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237 | validate();
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238 | if(f != null) {
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239 | f.pack();
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240 | f.show();
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241 | }
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242 |
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243 | boolean authenticationDone = false;
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244 |
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245 | while (!authenticationDone) {
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246 |
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247 | synchronized(authenticator) {
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248 | try {
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249 | authenticator.wait();
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250 | } catch (InterruptedException e) {
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251 | }
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252 | }
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253 |
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254 | sshUser = authenticator.sshUser.getText();
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255 | sshPasswd = authenticator.sshPassword.getText();
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256 | vncHost = authenticator.vncHost.getText();
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257 | vncPort = 5900;
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258 |
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259 | int ix;
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260 | if((ix = vncHost.indexOf(':')) != -1) {
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261 | try {
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262 | vncPort += Integer.parseInt(vncHost.substring(ix + 1));
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263 | } catch (NumberFormatException e) {
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264 | authenticator.retry("VNC host-string format error");
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265 | continue;
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266 | }
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267 | vncHost = vncHost.substring(0, ix);
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268 | }
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269 |
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270 | try {
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271 | rfb = new rfbProto(sshHost, sshPort, sshUser, sshPasswd, vncHost, vncPort, this);
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272 | } catch (java.net.ConnectException e) {
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273 | System.out.println("Connect...");
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274 | authenticator.retry("VNC host, connection refused");
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275 | continue;
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276 | } catch (java.io.IOException e) {
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277 | System.out.println("IO...");
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278 | authenticator.retry("SSH error: " + e.getMessage());
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279 | continue;
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280 | }
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281 |
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282 | if(rfb.connectAndAuthenticate(authenticator))
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283 | break;
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284 | }
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285 |
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286 | cont.remove(authenticator);
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287 | }
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288 |
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289 | int getInt(byte[] b, int o) {
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290 | int i = ( ( b[o + 0] & 0xff ) << 24 ) |
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291 | ( ( b[o + 1] & 0xff ) << 16 ) |
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292 | ( ( b[o + 2] & 0xff ) << 8 ) |
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293 | ( b[o + 3] & 0xff );
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294 | return i;
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295 | }
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296 |
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297 | void putInt(byte[] b, int o, int i) {
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298 | b[o + 0] = (byte) ( i >>> 24 );
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299 | b[o + 1] = (byte) ( i >>> 16 );
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300 | b[o + 2] = (byte) ( i >>> 8 );
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301 | b[o + 3] = (byte) i;
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302 | }
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303 |
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304 | //
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305 | // setCutText() - send the given cut text to the RFB server.
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306 | //
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307 |
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308 | public void setCutText(String text) {
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309 | try {
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310 | if ((rfb != null) && rfb.inNormalProtocol) {
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311 | rfb.writeClientCutText(text);
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312 | }
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313 | } catch (Exception e) {
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314 | e.printStackTrace();
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315 | }
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316 | }
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317 |
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318 |
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319 | //
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320 | // Respond to button presses
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321 | //
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322 |
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323 | public void buttonPressed(int buttonNum) {
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324 | switch(buttonNum) {
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325 | case 0:
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326 | rfb.close();
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327 | rfb = null;
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328 | break;
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329 | case 1:
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330 | if (options.isVisible()) {
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331 | options.hide();
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332 | } else {
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333 | options.show();
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334 | }
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335 | break;
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336 | case 2:
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337 | if (clipboard.isVisible()) {
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338 | clipboard.hide();
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339 | } else {
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340 | clipboard.show();
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341 | }
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342 | break;
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343 | case 3:
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344 | rfb.sendCtrlAltDel();
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345 | }
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346 | }
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347 |
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348 |
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349 | //
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350 | // Detect when the focus goes in and out of the applet. See
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351 | // vncCanvas.handleEvent() for details of why this is necessary.
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352 | //
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353 |
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354 | public boolean gotFocus = false;
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355 |
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356 | public boolean gotFocus(Event evt, Object what) {
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357 | gotFocus = true;
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358 | return true;
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359 | }
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360 | public boolean lostFocus(Event evt, Object what) {
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361 | gotFocus = false;
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362 | return true;
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363 | }
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364 |
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365 |
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366 | //
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367 | // encryptBytes() - encrypt some bytes in memory using a password. Note that
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368 | // the mapping from password to key must be the same as that used on the rfb
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369 | // server side.
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370 | //
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371 | // Note also that IDEA encrypts data in 8-byte blocks, so here we will ignore
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372 | // any data beyond the last 8-byte boundary leaving it to the calling
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373 | // function to pad the data appropriately.
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374 | //
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375 |
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376 | void encryptBytes(byte[] bytes, String passwd) {
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377 | byte[] key = new byte[8];
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378 | passwd.getBytes(0, passwd.length(), key, 0);
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379 |
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380 | for (int i = passwd.length(); i < 8; i++) {
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381 | key[i] = (byte)0;
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382 | }
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383 |
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384 | DesCipher des = new DesCipher(key);
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385 |
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386 | des.encrypt(bytes,0,bytes,0);
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387 | des.encrypt(bytes,8,bytes,8);
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388 | }
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389 |
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390 |
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391 | //
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392 | // readParameters() - read parameters from the html source or from the
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393 | // command line. On the command line, the arguments are just a sequence of
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394 | // param_name/param_value pairs where the names and values correspond to
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395 | // those expected in the html applet tag source.
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396 | //
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397 |
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398 | public void readParameters() {
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399 | sshHost = readParameter("sshhost", !inAnApplet);
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400 | if (sshHost == null) {
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401 | sshHost = getCodeBase().getHost();
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402 | if (sshHost.equals("")) {
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403 | fatalError("Not able to determine sshhost");
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404 | }
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405 | }
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406 |
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407 | String s = readParameter("sshport", false);
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408 | if(s != null)
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409 | sshPort = Integer.parseInt(s);
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410 | else
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411 | sshPort = SSH.DEFAULTPORT;
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412 |
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413 | try {
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414 | separateFrame = (new Boolean(getParameter("sepframe"))).booleanValue();
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415 | } catch (Exception e) {
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416 | separateFrame = true;
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417 | }
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418 |
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419 | }
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420 |
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421 | public String readParameter(String name, boolean required) {
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422 | if (inAnApplet) {
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423 | String s = getParameter(name);
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424 | if ((s == null) && required) {
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425 | fatalError(name + " parameter not specified");
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426 | }
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427 | return s;
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428 | }
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429 |
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430 | for (int i = 0; i < mainArgs.length; i += 2) {
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431 | if (mainArgs[i].equalsIgnoreCase(name)) {
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432 | try {
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433 | return mainArgs[i+1];
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434 | } catch (Exception e) {
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435 | if (required) {
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436 | fatalError(name + " parameter not specified");
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437 | }
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438 | return null;
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439 | }
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440 | }
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441 | }
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442 | if (required) {
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443 | fatalError(name + " parameter not specified");
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444 | }
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445 | return null;
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446 | }
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447 |
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448 | //
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449 | // fatalError() - print out a fatal error message.
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450 | //
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451 |
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452 | public void fatalError(String s) {
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453 | System.out.println(s);
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454 |
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455 | if (inAnApplet) {
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456 | cont.removeAll();
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457 | Label l = new Label(s);
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458 |
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459 | setLayout(new FlowLayout(FlowLayout.LEFT, 30, 30));
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460 | cont.add(l);
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461 | validate();
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462 | Thread.currentThread().stop();
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463 | } else {
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464 | System.exit(1);
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465 | }
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466 | }
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467 | }
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