1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmsutil.radius;
import java.util.*;
import java.math.*;
import java.security.*;
import java.net.*;
import java.io.*;
/**
* This class implements RFC2865 - Remote Authentication Dial In
* User Service (RADIUS), June 2000.
*/
public class RadiusConn {
public static int MAX_RETRIES = 10;
public static int OFFICAL_PORT = 1812;
public static int DEFAULT_PORT = 1645;
public static int DEFAULT_TIMEOUT = 5;
public static String OPTION_DEBUG = "OPTION_DEBUG";
private Properties _options = null;
private boolean _traceOn = true;
private String _host[] = new String[2];
private int _port[] = new int[2];
private int _selected = 0;
private String _secret = null;
private DatagramSocket _socket = null;
private short _id = (short) System.currentTimeMillis();
private int _maxRetries = MAX_RETRIES;
private SecureRandom _rand = null;
public RadiusConn(String host1, String host2, int port, String secret,
int timeout) throws SocketException {
this(host1, port, host2, port, secret, timeout, null, null);
}
public RadiusConn(String host, int port, String secret, byte seed[],
Properties options)
throws SocketException {
this(host, port, host, port, secret, DEFAULT_TIMEOUT, seed, options);
}
public RadiusConn(String host1, int port1, String host2, int port2,
String secret, int timeout, byte seed[], Properties options)
throws SocketException {
_host[0] = host1;
_port[0] = port1;
_host[1] = host2;
_port[1] = port2;
_selected = 0;
_secret = secret;
_options = options;
_socket = new DatagramSocket();
_socket.setSoTimeout(timeout * 1000);
if (seed == null) {
_rand = new SecureRandom();
} else {
_rand = new SecureRandom(seed);
}
}
public void disconnect() throws IOException {
_socket.disconnect();
}
public void authenticate(String name, String password)
throws IOException, NoSuchAlgorithmException,
RejectException, ChallengeException {
int retries = 0;
Packet res = null;
do {
AccessRequest req = createAccessRequest();
req.addAttribute(new UserNameAttribute(name));
req.addAttribute(new UserPasswordAttribute(req.getAuthenticator(),
_secret, password));
req.addAttribute(new NASIPAddressAttribute(InetAddress.getLocalHost()));
req.addAttribute(new NASPortAttribute(_socket.getLocalPort()));
send(req, _host[_selected], _port[_selected]);
try {
retries++;
res = receive();
if (res instanceof AccessReject) {
throw new RejectException((AccessReject) res);
} else if (res instanceof AccessChallenge) {
throw new ChallengeException((AccessChallenge) res);
}
} catch (InterruptedIOException e) {
if (retries >= _maxRetries) {
// switch server if maxRetries reaches limit
retries = 0;
if (_selected == 0) {
_selected = 1;
} else {
_selected = 0;
}
// throw e;
}
}
}
while (res == null);
}
public void replyChallenge(String password, ChallengeException ce)
throws IOException, NoSuchAlgorithmException,
RejectException, ChallengeException {
replyChallenge(null, password, ce);
}
public void replyChallenge(String name, String password,
ChallengeException ce)
throws IOException, NoSuchAlgorithmException,
RejectException, ChallengeException {
StateAttribute state = (StateAttribute)
ce.getAttributeSet().getAttributeByType(Attribute.STATE);
if (state == null)
throw new IOException("State not found in challenge");
AccessRequest req = createAccessRequest();
req.addAttribute(state); // needed in challenge
if (name != null) {
req.addAttribute(new UserNameAttribute(name));
}
req.addAttribute(new UserPasswordAttribute(req.getAuthenticator(),
_secret, password));
req.addAttribute(new NASIPAddressAttribute(InetAddress.getLocalHost()));
req.addAttribute(new NASPortAttribute(_socket.getLocalPort()));
send(req, _host[_selected], _port[_selected]);
Packet res = receive();
if (res instanceof AccessReject) {
throw new RejectException((AccessReject) res);
} else if (res instanceof AccessChallenge) {
throw new ChallengeException((AccessChallenge) res);
}
}
public void replyChallenge(String name, String password, String state)
throws IOException, NoSuchAlgorithmException,
RejectException, ChallengeException {
if (state == null)
throw new IOException("State not found in challenge");
AccessRequest req = createAccessRequest();
req.addAttribute(new StateAttribute(state)); // needed in challenge
req.addAttribute(new UserNameAttribute(name));
req.addAttribute(new UserPasswordAttribute(req.getAuthenticator(),
_secret, password));
req.addAttribute(new NASIPAddressAttribute(InetAddress.getLocalHost()));
req.addAttribute(new NASPortAttribute(_socket.getLocalPort()));
send(req, _host[_selected], _port[_selected]);
Packet res = receive();
if (res instanceof AccessReject) {
throw new RejectException((AccessReject) res);
} else if (res instanceof AccessChallenge) {
throw new ChallengeException((AccessChallenge) res);
}
}
private short getIdentifier() {
return _id++;
}
private void send(NASPacket packet, String host, int port)
throws IOException {
DatagramPacket dp = new DatagramPacket(new byte[4096], 4096);
dp.setPort(port);
dp.setAddress(InetAddress.getByName(host));
byte data[] = packet.getData();
dp.setLength(data.length);
dp.setData(data);
_socket.send(dp);
if (_traceOn)
trace("Sent " + packet);
}
private ServerPacket receive()
throws IOException {
DatagramPacket dp = new DatagramPacket(new byte[4096], 4096);
_socket.receive(dp);
byte data[] = dp.getData();
ServerPacket p = PacketFactory.createServerPacket(data);
if (_traceOn)
trace("Received " + p + " size=" + p.getAttributeSet().size());
return p;
}
private AccessRequest createAccessRequest() throws NoSuchAlgorithmException {
RequestAuthenticator ra = new RequestAuthenticator(_rand, _secret);
AccessRequest req = new AccessRequest(getIdentifier(), ra);
return req;
}
private void trace(String msg) {
System.out.println("TRACE: " + msg);
System.out.flush();
}
}
|
