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package org.spongycastle.crypto.params;
import org.spongycastle.crypto.DerivationParameters;
import org.spongycastle.util.Arrays;
public final class KDFCounterParameters
implements DerivationParameters
{
private final byte[] ki;
private final byte[] fixedInputData;
private final int r;
public KDFCounterParameters(byte[] ki, byte[] fixedInputData, int r)
{
if (ki == null)
{
throw new IllegalArgumentException("A KDF requires Ki (a seed) as input");
}
this.ki = Arrays.clone(ki);
if (fixedInputData == null)
{
this.fixedInputData = new byte[0];
}
else
{
this.fixedInputData = Arrays.clone(fixedInputData);
}
if (r != 8 && r != 16 && r != 24 && r != 32)
{
throw new IllegalArgumentException("Length of counter should be 8, 16, 24 or 32");
}
this.r = r;
}
public byte[] getKI()
{
return ki;
}
public byte[] getFixedInputData()
{
return Arrays.clone(fixedInputData);
}
public int getR()
{
return r;
}
}
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