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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
package org.bouncycastle.crypto.modes.gcm;
import org.bouncycastle.util.Arrays;
public class BasicGCMExponentiator
implements GCMExponentiator
{
private long[] x;
public void init(byte[] x)
{
this.x = GCMUtil.asLongs(x);
}
public void exponentiateX(long pow, byte[] output)
{
// Initial value is little-endian 1
long[] y = GCMUtil.oneAsLongs();
if (pow > 0)
{
long[] powX = Arrays.clone(x);
do
{
if ((pow & 1L) != 0)
{
GCMUtil.multiply(y, powX);
}
GCMUtil.square(powX, powX);
pow >>>= 1;
}
while (pow > 0);
}
GCMUtil.asBytes(y, output);
}
}