/*
 * Copyright (c) 2004 Beeyond Software Holding BV
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*!\file NullCipher.h
 * \ingroup CXX_CRYPTO_m
 */

#ifndef _CLASS_NULLCIPHER_H
#define _CLASS_NULLCIPHER_H

#ifdef __cplusplus

#include "beecrypt/c++/crypto/Cipher.h"
using beecrypt::crypto::Cipher;

namespace beecrypt {
	namespace crypto {
		/*!\ingroup CXX_CRYPTO_m
		 */
		class BEECRYPTCXXAPI NullCipher : public Cipher
		{
		private:
			class NullCipherSpi : public CipherSpi
			{
			protected:
				virtual bytearray* engineDoFinal(const byte* input, size_t inputOffset, size_t inputLength) throw (IllegalBlockSizeException, BadPaddingException);
				virtual size_t engineDoFinal(const byte* input, size_t inputOffset, size_t inputLength, bytearray& output, size_t outputOffset) throw (ShortBufferException, IllegalBlockSizeException, BadPaddingException);

				virtual size_t engineGetBlockSize() const throw ();
				virtual bytearray* engineGetIV();
				virtual size_t engineGetOutputSize(size_t inputLength) throw ();
				virtual AlgorithmParameters* engineGetParameters() throw ();

				virtual void engineInit(int opmode, const Key& key, SecureRandom* random) throw (InvalidKeyException);
				virtual void engineInit(int opmode, const Key& key, AlgorithmParameters* params, SecureRandom* random) throw (InvalidKeyException, InvalidAlgorithmParameterException);
				virtual void engineInit(int opmode, const Key& key, const AlgorithmParameterSpec& params, SecureRandom* random) throw (InvalidKeyException, InvalidAlgorithmParameterException);

				virtual void engineSetMode(const String& mode) throw (NoSuchAlgorithmException);
				virtual void engineSetPadding(const String& padding) throw (NoSuchPaddingException);

				virtual bytearray* engineUpdate(const byte* input, size_t inputOffset, size_t inputLength);
				virtual size_t engineUpdate(const byte* input, size_t inputOffset, size_t inputLength, bytearray& output, size_t outputOffset) throw (ShortBufferException);

			public:
				virtual ~NullCipherSpi() {};
			};

		public:
			NullCipher();
			virtual ~NullCipher() {};
		};
	}
}

#endif

#endif