org.bouncycastle.operator.MacCalculator Maven / Gradle / Ivy
package org.bouncycastle.operator;
import java.io.OutputStream;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
/**
* General interface for a key initialized operator that is able to calculate a MAC from
* a stream of output.
*/
public interface MacCalculator
{
AlgorithmIdentifier getAlgorithmIdentifier();
/**
* Returns a stream that will accept data for the purpose of calculating
* the MAC for later verification. Use org.bouncycastle.util.io.TeeOutputStream if you want to accumulate
* the data on the fly as well.
*
* @return an OutputStream
*/
OutputStream getOutputStream();
/**
* Return the calculated MAC based on what has been written to the stream.
*
* @return calculated MAC.
*/
byte[] getMac();
/**
* Return the key used for calculating the MAC.
*
* @return the MAC key.
*/
GenericKey getKey();
}