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1
2 import com.jcraft.jsch.*;
3 import java.awt.*;
4 import javax.swing.*;
5
6 public class KnownHosts{
7 public static void main(String  [] arg){
8
9 try{
10 JSch jsch=new JSch();
11
12 JFileChooser chooser = new JFileChooser();
13 chooser.setDialogTitle("Choose your known_hosts(ex. ~/.ssh/known_hosts)");
14 chooser.setFileHidingEnabled(false);
15 int returnVal=chooser.showOpenDialog(null);
16 if(returnVal==JFileChooser.APPROVE_OPTION) {
17 System.out.println("You chose "+
18 chooser.getSelectedFile().getAbsolutePath()+".");
19 jsch.setKnownHosts(chooser.getSelectedFile().getAbsolutePath());
20 }
21
22 HostKeyRepository hkr=jsch.getHostKeyRepository();
23 HostKey[] hks=hkr.getHostKey();
24 if(hks!=null){
25 System.out.println("Host keys in "+hkr.getKnownHostsRepositoryID());
26 for(int i=0; i<hks.length; i++){
27 HostKey hk=hks[i];
28 System.out.println(hk.getHost()+" "+
29 hk.getType()+" "+
30 hk.getFingerPrint(jsch));
31 }
32 System.out.println("");
33 }
34
35 String host=JOptionPane.showInputDialog("Enter username@hostname",
36 System.getProperty("user.name")+
37 "@localhost");
38 String user=host.substring(0, host.indexOf('@'));
39 host=host.substring(host.indexOf('@')+1);
40
41 Session session=jsch.getSession(user, host, 22);
42
43 UserInfo ui=new MyUserInfo();
45 session.setUserInfo(ui);
46
47
53
54 session.connect();
55
56 {
57 HostKey hk=session.getHostKey();
58 System.out.println("HostKey: "+
59 hk.getHost()+" "+
60 hk.getType()+" "+
61 hk.getFingerPrint(jsch));
62 }
63
64 Channel channel=session.openChannel("shell");
65
66 channel.setInputStream(System.in);
67 channel.setOutputStream(System.out);
68
69 channel.connect();
70 }
71 catch(Exception e){
72 System.out.println(e);
73 }
74 }
75
76 public static class MyUserInfo implements UserInfo, UIKeyboardInteractive{
77 public String getPassword(){ return passwd; }
78 public boolean promptYesNo(String str){
79 Object [] options={ "yes", "no" };
80 int foo=JOptionPane.showOptionDialog(null,
81 str,
82 "Warning",
83 JOptionPane.DEFAULT_OPTION,
84 JOptionPane.WARNING_MESSAGE,
85 null, options, options[0]);
86 return foo==0;
87 }
88
89 String passwd;
90 JTextField passwordField=(JTextField)new JPasswordField(20);
91
92 public String getPassphrase(){ return null; }
93 public boolean promptPassphrase(String message){ return true; }
94 public boolean promptPassword(String message){
95 Object [] ob={passwordField};
96 int result=
97 JOptionPane.showConfirmDialog(null, ob, message,
98 JOptionPane.OK_CANCEL_OPTION);
99 if(result==JOptionPane.OK_OPTION){
100 passwd=passwordField.getText();
101 return true;
102 }
103 else{ return false; }
104 }
105 public void showMessage(String message){
106 JOptionPane.showMessageDialog(null, message);
107 }
108 final GridBagConstraints gbc =
109 new GridBagConstraints(0,0,1,1,1,1,
110 GridBagConstraints.NORTHWEST,
111 GridBagConstraints.NONE,
112 new Insets(0,0,0,0),0,0);
113 private Container panel;
114 public String [] promptKeyboardInteractive(String destination,
115 String name,
116 String instruction,
117 String [] prompt,
118 boolean[] echo){
119 panel = new JPanel();
120 panel.setLayout(new GridBagLayout());
121
122 gbc.weightx = 1.0;
123 gbc.gridwidth = GridBagConstraints.REMAINDER;
124 gbc.gridx = 0;
125 panel.add(new JLabel(instruction), gbc);
126 gbc.gridy++;
127
128 gbc.gridwidth = GridBagConstraints.RELATIVE;
129
130 JTextField[] texts=new JTextField[prompt.length];
131 for(int i=0; i<prompt.length; i++){
132 gbc.fill = GridBagConstraints.NONE;
133 gbc.gridx = 0;
134 gbc.weightx = 1;
135 panel.add(new JLabel(prompt[i]),gbc);
136
137 gbc.gridx = 1;
138 gbc.fill = GridBagConstraints.HORIZONTAL;
139 gbc.weighty = 1;
140 if(echo[i]){
141 texts[i]=new JTextField(20);
142 }
143 else{
144 texts[i]=new JPasswordField(20);
145 }
146 panel.add(texts[i], gbc);
147 gbc.gridy++;
148 }
149
150 if(JOptionPane.showConfirmDialog(null, panel,
151 destination+": "+name,
152 JOptionPane.OK_CANCEL_OPTION,
153 JOptionPane.QUESTION_MESSAGE)
154 ==JOptionPane.OK_OPTION){
155 String [] response=new String [prompt.length];
156 for(int i=0; i<prompt.length; i++){
157 response[i]=texts[i].getText();
158 }
159 return response;
160 }
161 else{
162 return null; }
164 }
165 }
166 }
167
168
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