001 /* SslRMIClientSocketFactory.java --
002 Copyright (C) 2006 Free Software Foundation
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package javax.rmi.ssl;
039
040 import java.io.IOException;
041 import java.io.Serializable;
042
043 import java.util.StringTokenizer;
044 import javax.net.ssl.SSLSocketFactory;
045 import javax.net.ssl.SSLSocket;
046 import java.net.Socket;
047 import java.rmi.server.RMIClientSocketFactory;
048
049 /**
050 * SslRMIClientSocketFactory
051 *
052 * This class implements an RMIClientSocketFactory for SSL sockets.
053 * it uses the default SSLClientSocketFactory.
054 *
055 * This class can optionally use the following system properties, if set:
056 * <code>javax.rmi.ssl.client.enabledCipherSuites</code>
057 * <code>javax.rmi.ssl.client.enabledProtocols</code>
058 *
059 * These properties will specify a list of SSL/TLS cipher suites and protocols,
060 * respectively, to enable on the created sockets.
061 *
062 * Both properties should consist of a comma-separated list.
063 *
064 * @author Sven de Marothy
065 * @since 1.5
066 */
067 public class SslRMIClientSocketFactory
068 implements RMIClientSocketFactory, Serializable
069 {
070
071 /**
072 * Compatible with JDK 1.5
073 */
074 private static final long serialVersionUID = -8310631444933958385L;
075
076 private String[] enabledCipherSuites, enabledProtocols;
077
078 /**
079 * The SSL Socket factory.
080 */
081 private static SSLSocketFactory socketFactory =
082 (SSLSocketFactory)SSLSocketFactory.getDefault();
083
084 /**
085 * Creates a new SslRMIClientSocketFactory
086 */
087 public SslRMIClientSocketFactory()
088 {
089 enabledCipherSuites = getProp("javax.rmi.ssl.client.enabledCipherSuites");
090 enabledProtocols = getProp("javax.rmi.ssl.client.enabledProtocols");
091 }
092
093 private String[] getProp(String p)
094 {
095 String o;
096 try
097 {
098 o = System.getProperty(p);
099 }
100 catch(SecurityException se)
101 {
102 return null;
103 }
104
105 if (o == null)
106 return null;
107 StringTokenizer st = new StringTokenizer( o, "," );
108 int n = st.countTokens();
109 if( n < 1 )
110 return null;
111 String[] strs = new String[ n ];
112 for( int i = 0; i < n; i++ )
113 strs[i] = st.nextToken().trim();
114
115 return strs;
116 }
117
118 /**
119 * Creates an SSLSocket on a given port
120 *
121 * @throws IOException if an error occurs on socket creation.
122 */
123 public Socket createSocket(String host, int port) throws IOException
124 {
125 SSLSocket socket = (SSLSocket)socketFactory.
126 createSocket( host, port );
127 if( enabledCipherSuites != null )
128 socket.setEnabledCipherSuites( enabledCipherSuites );
129 if( enabledProtocols != null )
130 socket.setEnabledProtocols( enabledProtocols );
131 return socket;
132 }
133
134 /**
135 * Compare two SslRMIServerSocketFactor instances
136 */
137 public boolean equals(Object obj)
138 {
139 if( !(obj instanceof SslRMIClientSocketFactory) )
140 return false;
141 SslRMIClientSocketFactory s = (SslRMIClientSocketFactory)obj;
142
143 if(!SslRMIServerSocketFactory.
144 cmpStrArray(enabledCipherSuites, s.enabledCipherSuites))
145 return false;
146
147 if(!SslRMIServerSocketFactory.
148 cmpStrArray(enabledProtocols, s.enabledProtocols))
149 return false;
150
151 return true;
152 }
153
154 /**
155 * Returns the hash code of this object.
156 */
157 public int hashCode()
158 {
159 int hash = 0;
160 if( enabledCipherSuites != null )
161 for(int i = 0; i < enabledCipherSuites.length; i++ )
162 hash = hash ^ enabledCipherSuites[i].hashCode();
163 if( enabledProtocols != null )
164 for(int i = 0; i < enabledProtocols.length; i++ )
165 hash = hash ^ enabledProtocols[i].hashCode();
166 return hash;
167 }
168 }