/*****************************************************************
|
| Neptune - Crypto
|
| Copyright (c) 2002-2010, Axiomatic Systems, LLC.
| All rights reserved.
|
| Redistribution and use in source and binary forms, with or without
| modification, are permitted provided that the following conditions are met:
| * Redistributions of source code must retain the above copyright
| notice, this list of conditions and the following disclaimer.
| * Redistributions in binary form must reproduce the above copyright
| notice, this list of conditions and the following disclaimer in the
| documentation and/or other materials provided with the distribution.
| * Neither the name of Axiomatic Systems nor the
| names of its contributors may be used to endorse or promote products
| derived from this software without specific prior written permission.
|
| THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
| EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
| DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
****************************************************************/
#ifndef _NPT_CRYPTO_H_
#define _NPT_CRYPTO_H_
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "NptTypes.h"
#include "NptDataBuffer.h"
/*----------------------------------------------------------------------
| NPT_BlockCipher
+---------------------------------------------------------------------*/
class NPT_BlockCipher {
public:
// types
typedef enum {
AES_128
} Algorithm;
typedef enum {
ENCRYPT,
DECRYPT
} Direction;
// factory
static NPT_Result Create(Algorithm algorithm,
Direction direction,
const NPT_UInt8* key,
NPT_Size key_size,
NPT_BlockCipher*& cipher);
// methods
virtual ~NPT_BlockCipher() {}
virtual NPT_Size GetBlockSize() = 0;
virtual Direction GetDirection() = 0;
virtual Algorithm GetAlgorithm() = 0;
virtual NPT_Result ProcessBlock(const NPT_UInt8* input, NPT_UInt8* output) = 0;
/**
* @param iv Initial vector (same size as cipher block size), or NULL for an IV made up of all zeros.
*/
virtual NPT_Result ProcessCbc(const NPT_UInt8* input, NPT_Size input_size, const NPT_UInt8* iv, NPT_DataBuffer& output);
protected:
NPT_BlockCipher() {} // don't instantiate directly
};
#endif // _NPT_CRYPTO_H_