1 /* EncryptedPreMasterSecret.java -- RSA encrypted secret.
2    Copyright (C) 2006  Free Software Foundation, Inc.
3 
4 This file is a part of GNU Classpath.
5 
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or (at
9 your option) any later version.
10 
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 General Public License for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
19 USA
20 
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library.  Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25 
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module.  An independent module is a module which is not derived from
33 or based on this library.  If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so.  If you do not wish to do so, delete this
36 exception statement from your version.  */
37 
38 
39 package gnu.javax.net.ssl.provider;
40 
41 import java.io.PrintWriter;
42 import java.io.StringWriter;
43 
44 import java.nio.ByteBuffer;
45 
46 /**
47  * The client's RSA-encrypted pre-master secret.
48  *
49  * <pre>
50 struct {
51   public-key-encrypted PreMasterSecret pre_master_secret;
52 } EncryptedPreMasterSecret;</pre>
53  */
54 public final class EncryptedPreMasterSecret extends ExchangeKeys implements Builder
55 {
56   private final ProtocolVersion version;
57 
EncryptedPreMasterSecret(ByteBuffer buffer, ProtocolVersion version)58   public EncryptedPreMasterSecret(ByteBuffer buffer, ProtocolVersion version)
59   {
60     super(buffer);
61     version.getClass();
62     this.version = version;
63   }
64 
EncryptedPreMasterSecret(byte[] encryptedSecret, ProtocolVersion version)65   public EncryptedPreMasterSecret(byte[] encryptedSecret, ProtocolVersion version)
66   {
67     this(ByteBuffer.allocate(version == ProtocolVersion.SSL_3
68                              ? encryptedSecret.length
69                              : encryptedSecret.length + 2), version);
70     ByteBuffer b = buffer.duplicate();
71     if (version != ProtocolVersion.SSL_3)
72       b.putShort((short) encryptedSecret.length);
73     b.put(encryptedSecret);
74   }
75 
buffer()76   public ByteBuffer buffer()
77   {
78     return (ByteBuffer) buffer.duplicate().rewind();
79   }
80 
encryptedSecret()81   public byte[] encryptedSecret()
82   {
83     byte[] secret;
84     if (version == ProtocolVersion.SSL_3)
85       {
86         buffer.position (0);
87         secret = new byte[buffer.limit ()];
88         buffer.get(secret);
89       }
90     else
91       {
92         int len = buffer.getShort(0) & 0xFFFF;
93         secret = new byte[len];
94         buffer.position(2);
95         buffer.get(secret);
96       }
97     return secret;
98   }
99 
setEncryptedSecret(final byte[] secret, final int offset, final int length)100   public void setEncryptedSecret(final byte[] secret, final int offset, final int length)
101   {
102     if (version == ProtocolVersion.SSL_3)
103       {
104         buffer.position(0);
105         buffer.put(secret, offset, length);
106         buffer.rewind();
107       }
108     else
109       {
110         buffer.putShort(0, (short) length);
111         buffer.position(2);
112         buffer.put(secret, offset, length);
113         buffer.rewind();
114       }
115   }
116 
length()117   public int length ()
118   {
119     if (version == ProtocolVersion.SSL_3)
120       {
121         return buffer.capacity();
122       }
123     else
124       {
125         return (buffer.getShort(0) & 0xFFFF) + 2;
126       }
127   }
128 
toString()129   public String toString ()
130   {
131     return toString (null);
132   }
133 
toString(final String prefix)134   public String toString (final String prefix)
135   {
136     StringWriter str = new StringWriter();
137     PrintWriter out = new PrintWriter(str);
138     if (prefix != null) out.print(prefix);
139     out.println("struct {");
140     if (prefix != null) out.print(prefix);
141     out.println("  pre_master_secret = ");
142     out.print(Util.hexDump(encryptedSecret(), prefix != null ? prefix + "    "
143                                                              : "    "));
144     if (prefix != null) out.print(prefix);
145     out.print("} EncryptedPreMasterSecret;");
146     return str.toString();
147   }
148 }
149