1package org.bouncycastle.operator; 2 3import java.io.OutputStream; 4 5import org.bouncycastle.asn1.x509.AlgorithmIdentifier; 6 7public interface MacCalculator 8{ 9 AlgorithmIdentifier getAlgorithmIdentifier(); 10 11 /** 12 * Returns a stream that will accept data for the purpose of calculating 13 * the MAC for later verification. Use org.bouncycastle.util.io.TeeOutputStream if you want to accumulate 14 * the data on the fly as well. 15 * 16 * @return an OutputStream 17 */ 18 OutputStream getOutputStream(); 19 20 /** 21 * Return the calculated MAC based on what has been written to the stream. 22 * 23 * @return calculated MAC. 24 */ 25 byte[] getMac(); 26 27 28 /** 29 * Return the key used for calculating the MAC. 30 * 31 * @return the MAC key. 32 */ 33 GenericKey getKey(); 34}