/**
 *  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.kerby.kerberos.kerb.crypto.enc;

import org.apache.kerby.kerberos.kerb.crypto.cksum.provider.Crc32Provider;
import org.apache.kerby.kerberos.kerb.KrbException;
import org.apache.kerby.kerberos.kerb.type.base.CheckSumType;
import org.apache.kerby.kerberos.kerb.type.base.EncryptionType;

public class DesCbcCrcEnc extends DesCbcEnc {

    public DesCbcCrcEnc() {
        super(new Crc32Provider());
    }

    public EncryptionType eType() {
        return EncryptionType.DES_CBC_CRC;
    }

    public CheckSumType checksumType() {
        return CheckSumType.CRC32;
    }

    @Override
    public byte[] encrypt(byte[] data, byte[] key, int usage) throws KrbException {
        byte[] iv = new byte[encProvider().blockSize()];
        System.arraycopy(key, 0, iv, 0, key.length);
        return encrypt(data, key, iv, usage);
    }

    @Override
    public byte[] decrypt(byte[] cipher, byte[] key, int usage)
            throws KrbException {
        byte[] iv = new byte[encProvider().blockSize()];
        System.arraycopy(key, 0, iv, 0, key.length);
        return decrypt(cipher, key, iv, usage);
    }
}
