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package org.apidesign.impl.security.extension;

import org.apidesign.impl.security.friendapi.DigestImplementation;

import org.apidesign.impl.security.friendapi.DigestProvider;

import java.nio.ByteBuffer;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import java.util.logging.Level;

import java.util.logging.Logger;

/**

 *

 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 */

public class BridgeToOldAlgorithmsProvider implements DigestProvider {

    public DigestImplementation create(String algorithm) {

        try {

            final MessageDigest md = MessageDigest.getInstance(algorithm);

            return new DigestImplementation(algorithm) {

                @Override

                public void update(ByteBuffer bb) {

                    md.update(bb);

                }

                @Override

                public byte[] digest() {

                    return md.digest();

                }

            };

        } catch (NoSuchAlgorithmException ex) {

            Logger.getLogger(BridgeToOldAlgorithmsProvider.class.getName()).log(Level.INFO, null, ex);

            return null;

        }

    }

    static {

        new BridgeToOld();

    }

}