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package org.spongycastle.openpgp.operator;
import java.io.OutputStream;
public interface PGPDigestCalculator
{
/**
* Return the algorithm number representing the digest implemented by
* this calculator.
*
* @return algorithm number
*/
int getAlgorithm();
/**
* Returns a stream that will accept data for the purpose of calculating
* a digest. Use org.spongycastle.util.io.TeeOutputStream if you want to accumulate
* the data on the fly as well.
*
* @return an OutputStream
*/
OutputStream getOutputStream();
/**
* Return the digest calculated on what has been written to the calculator's output stream.
*
* @return a digest.
*/
byte[] getDigest();
/**
* Reset the underlying digest calculator
*/
void reset();
}
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