/* AESSpi.java -- 
   Copyright (C) 2002, 2006  Free Software Foundation, Inc.

This file is a part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.

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WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
USA

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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package gnu.javax.crypto.jce.cipher;

import gnu.java.security.Registry;
import gnu.javax.crypto.jce.spec.BlockCipherParameterSpec;

import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;

/**
 * The implementation of the AES <i>Service Provider Interface</i> (<b>SPI</b>)
 * adapter.
 */
public final class AESSpi
    extends CipherAdapter
{
  public AESSpi()
  {
    super(Registry.AES_CIPHER, 16);
  }

  protected void engineInit(int opmode, Key key, AlgorithmParameterSpec params,
                            SecureRandom random) throws InvalidKeyException,
      InvalidAlgorithmParameterException
  {
    if (params instanceof BlockCipherParameterSpec)
      {
        if (((BlockCipherParameterSpec) params).getBlockSize() != 16)
          throw new InvalidAlgorithmParameterException(
              "AES block size must be 16 bytes");
      }
    super.engineInit(opmode, key, params, random);
  }

  protected void engineInit(int opmode, Key key, AlgorithmParameters params,
                            SecureRandom random) throws InvalidKeyException,
      InvalidAlgorithmParameterException
  {
    AlgorithmParameterSpec spec = null;
    try
      {
        if (params != null)
          spec = params.getParameterSpec(BlockCipherParameterSpec.class);
      }
    catch (InvalidParameterSpecException ipse)
      {
      }
    engineInit(opmode, key, spec, random);
  }
}