1
/* SSLRandom.java -- SSLv3 pseudo-random function.
2
Copyright (C) 2006 Free Software Foundation, Inc.
4
This file is a part of GNU Classpath.
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.
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.
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
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
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. */
39
package gnu.javax.net.ssl.provider;
42
import gnu.java.security.hash.HashFactory;
43
import gnu.java.security.hash.IMessageDigest;
44
import gnu.java.security.prng.IRandom;
45
import gnu.java.security.prng.LimitReachedException;
47
class SSLRandom implements IRandom
51
// -------------------------------------------------------------------------
53
static final String SECRET = "jessie.sslprng.secret";
54
static final String SEED = "jessie.sslprng.seed";
56
private final IMessageDigest md5, sha;
57
private byte[] secret;
58
private byte[] buffer;
64
// -------------------------------------------------------------------------
68
md5 = HashFactory.getInstance("MD5");
69
sha = HashFactory.getInstance("SHA-1");
73
// -------------------------------------------------------------------------
75
public void init(Map attrib)
77
secret = (byte[]) attrib.get(SECRET);
78
seed = (byte[]) attrib.get(SEED);
80
if (secret == null || seed == null)
81
throw new NullPointerException();
84
try { buffer = nextBlock(); }
85
catch (LimitReachedException cantHappen) { }
95
throw new UnsupportedOperationException();
98
public byte nextByte() throws LimitReachedException
101
throw new IllegalStateException();
102
if (idx >= buffer.length)
103
buffer = nextBlock();
104
return buffer[idx++];
107
public void nextBytes(byte[] buf, int off, int len)
108
throws LimitReachedException
111
throw new IllegalStateException();
113
throw new NullPointerException();
114
if (off < 0 || len < 0 || off+len > buf.length)
115
throw new IndexOutOfBoundsException();
119
if (idx >= buffer.length)
120
buffer = nextBlock();
121
int l = Math.min(buffer.length-idx, len-count);
122
System.arraycopy(buffer, idx, buf, off+count, l);
128
public boolean selfTest()
133
// For future versions of GNU Crypto. No-ops.
134
public void addRandomByte (byte b)
138
public void addRandomBytes(byte[] buffer) {
139
addRandomBytes(buffer, 0, buffer.length);
142
public void addRandomBytes (byte[] b, int i, int j)
147
// -------------------------------------------------------------------------
149
private byte[] nextBlock() throws LimitReachedException
151
int count = pad - 'A' + 1;
153
throw new LimitReachedException();
154
for (int i = 0; i < count; i++)
156
sha.update(secret, 0, secret.length);
157
sha.update(seed, 0, seed.length);
158
byte[] b = sha.digest();
159
md5.update(secret, 0, secret.length);
160
md5.update(b, 0, b.length);