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package org.bouncycastle.tls.crypto;
/**
* Interface for message digest, or hash, services.
*/
public interface TlsHash
{
/**
* Update the hash with the passed in input.
*
* @param input input array containing the data.
* @param inOff offset into the input array the input starts at.
* @param length the length of the input data.
*/
void update(byte[] input, int inOff, int length);
/**
* Return calculated hash for any input passed in.
*
* @return the hash value.
*/
byte[] calculateHash();
/**
* Return a clone of this hash object representing its current state.
*
* @return a clone of the current hash.
*/
TlsHash cloneHash();
/**
* Reset the hash underlying this service.
*/
void reset();
}