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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.sshd.common.digest;

/**
 * Interface used to compute digests, based on algorithms such as MD5 or SHA1. The digest implementation are compared
 * first by the algorithm name (case insensitive and second according to the block size
 *
 * @author Apache MINA SSHD Project
 */
public interface Digest extends DigestInformation, Comparable {
    void init() throws Exception;

    void update(byte[] data) throws Exception;

    void update(byte[] data, int start, int len) throws Exception;

    byte[] digest() throws Exception;
}