https://openjdk.java.net/ 
/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */

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.

/**
 * 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 com.sun.org.apache.xml.internal.security.algorithms;

import java.security.MessageDigest;
import java.security.NoSuchProviderException;

import com.sun.org.apache.xml.internal.security.signature.XMLSignatureException;
import com.sun.org.apache.xml.internal.security.utils.Constants;
import com.sun.org.apache.xml.internal.security.utils.EncryptionConstants;
import org.w3c.dom.Document;


Digest Message wrapper and selector class.

MessageDigestAlgorithm.getInstance()



/**
 * Digest Message wrapper and selector class.
 *
 * <pre>
 * MessageDigestAlgorithm.getInstance()
 * </pre>
 */
public class MessageDigestAlgorithm extends Algorithm {

    
Message Digest - NOT RECOMMENDED MD5
/** Message Digest - NOT RECOMMENDED MD5*/
    public static final String ALGO_ID_DIGEST_NOT_RECOMMENDED_MD5 =
        Constants.MoreAlgorithmsSpecNS + "md5";
    
Digest - Required SHA1
/** Digest - Required SHA1*/
    public static final String ALGO_ID_DIGEST_SHA1 = Constants.SignatureSpecNS + "sha1";
    
Message Digest - OPTIONAL SHA224
/** Message Digest - OPTIONAL SHA224*/
    public static final String ALGO_ID_DIGEST_SHA224 =
        Constants.MoreAlgorithmsSpecNS + "sha224";
    
Message Digest - RECOMMENDED SHA256
/** Message Digest - RECOMMENDED SHA256*/
    public static final String ALGO_ID_DIGEST_SHA256 =
        EncryptionConstants.EncryptionSpecNS + "sha256";
    
Message Digest - OPTIONAL SHA384
/** Message Digest - OPTIONAL SHA384*/
    public static final String ALGO_ID_DIGEST_SHA384 =
        Constants.MoreAlgorithmsSpecNS + "sha384";
    
Message Digest - OPTIONAL SHA512
/** Message Digest - OPTIONAL SHA512*/
    public static final String ALGO_ID_DIGEST_SHA512 =
        EncryptionConstants.EncryptionSpecNS + "sha512";
    
Message Digest - OPTIONAL RIPEMD-160
/** Message Digest - OPTIONAL RIPEMD-160*/
    public static final String ALGO_ID_DIGEST_RIPEMD160 =
        EncryptionConstants.EncryptionSpecNS + "ripemd160";

    
Field algorithm stores the actual MessageDigest 
/** Field algorithm stores the actual {@link java.security.MessageDigest} */
    private final MessageDigest algorithm;

    
Constructor for the brave who pass their own message digest algorithms and the
corresponding URI.

Params:
  • doc – 
  • algorithmURI – 
/**
     * Constructor for the brave who pass their own message digest algorithms and the
     * corresponding URI.
     * @param doc
     * @param algorithmURI
     */
    private MessageDigestAlgorithm(Document doc, String algorithmURI)
        throws XMLSignatureException {
        super(doc, algorithmURI);

        algorithm = getDigestInstance(algorithmURI);
    }

    
Factory method for constructing a message digest algorithm by name.

Params:
  • doc – 
  • algorithmURI – 
Throws:
Returns:The MessageDigestAlgorithm element to attach in document and to digest
/**
     * Factory method for constructing a message digest algorithm by name.
     *
     * @param doc
     * @param algorithmURI
     * @return The MessageDigestAlgorithm element to attach in document and to digest
     * @throws XMLSignatureException
     */
    public static MessageDigestAlgorithm getInstance(
        Document doc, String algorithmURI
    ) throws XMLSignatureException {
        return new MessageDigestAlgorithm(doc, algorithmURI);
    }

    private static MessageDigest getDigestInstance(String algorithmURI) throws XMLSignatureException {
        String algorithmID = JCEMapper.translateURItoJCEID(algorithmURI);

        if (algorithmID == null) {
            Object[] exArgs = { algorithmURI };
            throw new XMLSignatureException("algorithms.NoSuchMap", exArgs);
        }

        MessageDigest md;
        String provider = JCEMapper.getProviderId();
        try {
            if (provider == null) {
                md = MessageDigest.getInstance(algorithmID);
            } else {
                md = MessageDigest.getInstance(algorithmID, provider);
            }
        } catch (java.security.NoSuchAlgorithmException ex) {
            Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };

            throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
        } catch (NoSuchProviderException ex) {
            Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };

            throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
        }

        return md;
    }

    
Returns the actual MessageDigest algorithm object 
Returns:the actual MessageDigest algorithm object
/**
     * Returns the actual {@link java.security.MessageDigest} algorithm object
     *
     * @return the actual {@link java.security.MessageDigest} algorithm object
     */
    public MessageDigest getAlgorithm() {
        return algorithm;
    }

    
Proxy method for MessageDigest.isEqual which is executed on the internal MessageDigest object. 
Params:
  • digesta – 
  • digestb – 
Returns:the result of the MessageDigest.isEqual method
/**
     * Proxy method for {@link java.security.MessageDigest#isEqual}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @param digesta
     * @param digestb
     * @return the result of the {@link java.security.MessageDigest#isEqual} method
     */
    public static boolean isEqual(byte[] digesta, byte[] digestb) {
        return MessageDigest.isEqual(digesta, digestb);
    }

    
Proxy method for MessageDigest.digest() which is executed on the internal MessageDigest object. 
Returns:the result of the MessageDigest.digest() method
/**
     * Proxy method for {@link java.security.MessageDigest#digest()}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @return the result of the {@link java.security.MessageDigest#digest()} method
     */
    public byte[] digest() {
        return algorithm.digest();
    }

    
Proxy method for MessageDigest.digest(byte[]) which is executed on the internal MessageDigest object. 
Params:
  • input – 
Returns:the result of the MessageDigest.digest(byte[]) method
/**
     * Proxy method for {@link java.security.MessageDigest#digest(byte[])}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @param input
     * @return the result of the {@link java.security.MessageDigest#digest(byte[])} method
     */
    public byte[] digest(byte input[]) {
        return algorithm.digest(input);
    }

    
Proxy method for MessageDigest.digest(byte[], int, int) which is executed on the internal MessageDigest object. 
Params:
  • buf – 
  • offset – 
  • len – 
Throws:
Returns:the result of the MessageDigest.digest(byte[], int, int) method
/**
     * Proxy method for {@link java.security.MessageDigest#digest(byte[], int, int)}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @param buf
     * @param offset
     * @param len
     * @return the result of the {@link java.security.MessageDigest#digest(byte[], int, int)} method
     * @throws java.security.DigestException
     */
    public int digest(byte buf[], int offset, int len) throws java.security.DigestException {
        return algorithm.digest(buf, offset, len);
    }

    
Proxy method for MessageDigest.getAlgorithm which is executed on the internal MessageDigest object. 
Returns:the result of the MessageDigest.getAlgorithm method
/**
     * Proxy method for {@link java.security.MessageDigest#getAlgorithm}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @return the result of the {@link java.security.MessageDigest#getAlgorithm} method
     */
    public String getJCEAlgorithmString() {
        return algorithm.getAlgorithm();
    }

    
Proxy method for MessageDigest.getProvider which is executed on the internal MessageDigest object. 
Returns:the result of the MessageDigest.getProvider method
/**
     * Proxy method for {@link java.security.MessageDigest#getProvider}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @return the result of the {@link java.security.MessageDigest#getProvider} method
     */
    public java.security.Provider getJCEProvider() {
        return algorithm.getProvider();
    }

    
Proxy method for MessageDigest.getDigestLength which is executed on the internal MessageDigest object. 
Returns:the result of the MessageDigest.getDigestLength method
/**
     * Proxy method for {@link java.security.MessageDigest#getDigestLength}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @return the result of the {@link java.security.MessageDigest#getDigestLength} method
     */
    public int getDigestLength() {
        return algorithm.getDigestLength();
    }

    
Proxy method for MessageDigest.reset which is executed on the internal MessageDigest object. 
/**
     * Proxy method for {@link java.security.MessageDigest#reset}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     */
    public void reset() {
        algorithm.reset();
    }

    
Proxy method for MessageDigest.update(byte[]) which is executed on the internal MessageDigest object. 
Params:
  • input – 
/**
     * Proxy method for {@link java.security.MessageDigest#update(byte[])}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @param input
     */
    public void update(byte[] input) {
        algorithm.update(input);
    }

    
Proxy method for MessageDigest.update(byte) which is executed on the internal MessageDigest object. 
Params:
  • input – 
/**
     * Proxy method for {@link java.security.MessageDigest#update(byte)}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @param input
     */
    public void update(byte input) {
        algorithm.update(input);
    }

    
Proxy method for MessageDigest.update(byte[], int, int) which is executed on the internal MessageDigest object. 
Params:
  • buf – 
  • offset – 
  • len – 
/**
     * Proxy method for {@link java.security.MessageDigest#update(byte[], int, int)}
     * which is executed on the internal {@link java.security.MessageDigest} object.
     *
     * @param buf
     * @param offset
     * @param len
     */
    public void update(byte buf[], int offset, int len) {
        algorithm.update(buf, offset, len);
    }

    
{@inheritDoc} 
/** {@inheritDoc} */
    public String getBaseNamespace() {
        return Constants.SignatureSpecNS;
    }

    
{@inheritDoc} 
/** {@inheritDoc} */
    public String getBaseLocalName() {
        return Constants._TAG_DIGESTMETHOD;
    }
}