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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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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.commons.codec.digest;

import java.security.MessageDigest;

/**
 * Standard {@link MessageDigest} algorithm names from the Java Cryptography Architecture Standard Algorithm Name
 * Documentation.
 * 
 * This class is immutable and thread-safe.
 *
 * @see Java Cryptography
 *      Architecture Standard Algorithm Name Documentation
 * @since 1.7
 * @version $Id: MessageDigestAlgorithms.java 1465850 2013-04-09 00:46:31Z sebb $
 */
public class MessageDigestAlgorithms {

    private MessageDigestAlgorithms() {
        // cannot be instantiated.
    }

    /**
     * The MD2 message digest algorithm defined in RFC 1319.
     */
    public static final String MD2 = "MD2";

    /**
     * The MD5 message digest algorithm defined in RFC 1321.
     */
    public static final String MD5 = "MD5";

    /**
     * The SHA-1 hash algorithm defined in the FIPS PUB 180-2.
     */
    public static final String SHA_1 = "SHA-1";

    /**
     * The SHA-256 hash algorithm defined in the FIPS PUB 180-2.
     */
    public static final String SHA_256 = "SHA-256";

    /**
     * The SHA-384 hash algorithm defined in the FIPS PUB 180-2.
     */
    public static final String SHA_384 = "SHA-384";

    /**
     * The SHA-512 hash algorithm defined in the FIPS PUB 180-2.
     */
    public static final String SHA_512 = "SHA-512";

}