blob: e51e6f042faab126e06826365510375b1639fff8 (
plain)
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
|
package org.bouncycastle.crypto.prng;
import java.security.SecureRandom;
public class X931SecureRandom
extends SecureRandom
{
private final boolean predictionResistant;
private final SecureRandom randomSource;
private final X931RNG drbg;
X931SecureRandom(SecureRandom randomSource, X931RNG drbg, boolean predictionResistant)
{
this.randomSource = randomSource;
this.drbg = drbg;
this.predictionResistant = predictionResistant;
}
public void setSeed(byte[] seed)
{
synchronized (this)
{
if (randomSource != null)
{
this.randomSource.setSeed(seed);
}
}
}
public void setSeed(long seed)
{
synchronized (this)
{
// this will happen when SecureRandom() is created
if (randomSource != null)
{
this.randomSource.setSeed(seed);
}
}
}
public void nextBytes(byte[] bytes)
{
synchronized (this)
{
// check if a reseed is required...
if (drbg.generate(bytes, predictionResistant) < 0)
{
drbg.reseed();
drbg.generate(bytes, predictionResistant);
}
}
}
public byte[] generateSeed(int numBytes)
{
byte[] bytes = new byte[numBytes];
this.nextBytes(bytes);
return bytes;
}
}
|