/*
* 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.directory.server.kerberos.shared.crypto.checksum;
import java.security.GeneralSecurityException;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.directory.server.kerberos.shared.crypto.encryption.KeyUsage;
/**
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
class HmacMd5Checksum implements ChecksumEngine
{
public ChecksumType checksumType()
{
return ChecksumType.HMAC_MD5;
}
public byte[] calculateChecksum( byte[] data, byte[] key, KeyUsage usage )
{
try
{
SecretKey sk = new SecretKeySpec( key, "ARCFOUR" );
Mac mac = Mac.getInstance( "HmacMD5" );
mac.init( sk );
return mac.doFinal( data );
}
catch ( GeneralSecurityException nsae )
{
nsae.printStackTrace();
return null;
}
}
}