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A Java security provider for supporting ShangMi algorithms in public key infrastructure

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/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.tencent.kona.sun.security.util;

import java.security.InvalidKeyException;
import javax.crypto.SecretKey;

/**
 * Special interface for additional MessageDigestSpi method(s).
 */
public interface MessageDigestSpi2 {

    /**
     * Updates the digest using the specified key.
     * This is used for SSL 3.0 only, we may deprecate and remove the support
     * of this in the future
     *
     * @param key  the key whose value is to be digested.
     */
    void engineUpdate(SecretKey key) throws InvalidKeyException;
}