63 lines
2.0 KiB
Java
63 lines
2.0 KiB
Java
package org.bouncycastle.crypto.prng;
|
|
|
|
/* loaded from: classes6.dex */
|
|
public class ReversedWindowGenerator implements RandomGenerator {
|
|
private final RandomGenerator generator;
|
|
private byte[] window;
|
|
private int windowCount;
|
|
|
|
@Override // org.bouncycastle.crypto.prng.RandomGenerator
|
|
public void nextBytes(byte[] bArr, int i, int i2) {
|
|
doNextBytes(bArr, i, i2);
|
|
}
|
|
|
|
@Override // org.bouncycastle.crypto.prng.RandomGenerator
|
|
public void nextBytes(byte[] bArr) {
|
|
doNextBytes(bArr, 0, bArr.length);
|
|
}
|
|
|
|
@Override // org.bouncycastle.crypto.prng.RandomGenerator
|
|
public void addSeedMaterial(byte[] bArr) {
|
|
synchronized (this) {
|
|
this.windowCount = 0;
|
|
this.generator.addSeedMaterial(bArr);
|
|
}
|
|
}
|
|
|
|
@Override // org.bouncycastle.crypto.prng.RandomGenerator
|
|
public void addSeedMaterial(long j) {
|
|
synchronized (this) {
|
|
this.windowCount = 0;
|
|
this.generator.addSeedMaterial(j);
|
|
}
|
|
}
|
|
|
|
private void doNextBytes(byte[] bArr, int i, int i2) {
|
|
synchronized (this) {
|
|
for (int i3 = 0; i3 < i2; i3++) {
|
|
if (this.windowCount <= 0) {
|
|
RandomGenerator randomGenerator = this.generator;
|
|
byte[] bArr2 = this.window;
|
|
randomGenerator.nextBytes(bArr2, 0, bArr2.length);
|
|
this.windowCount = this.window.length;
|
|
}
|
|
byte[] bArr3 = this.window;
|
|
int i4 = this.windowCount - 1;
|
|
this.windowCount = i4;
|
|
bArr[i3 + i] = bArr3[i4];
|
|
}
|
|
}
|
|
}
|
|
|
|
public ReversedWindowGenerator(RandomGenerator randomGenerator, int i) {
|
|
if (randomGenerator == null) {
|
|
throw new IllegalArgumentException("generator cannot be null");
|
|
}
|
|
if (i < 2) {
|
|
throw new IllegalArgumentException("windowSize must be at least 2");
|
|
}
|
|
this.generator = randomGenerator;
|
|
this.window = new byte[i];
|
|
}
|
|
}
|