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/*
* Block Cipher Mode
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_MODEBASE_H__
#define BOTAN_MODEBASE_H__
#include <botan/key_filt.h>
#include <botan/block_cipher.h>
namespace Botan {
/**
* This class represents an abstract block cipher mode
*/
class BOTAN_DLL BlockCipherMode : public Keyed_Filter
{
public:
std::string name() const;
void set_iv(const InitializationVector&);
void set_key(const SymmetricKey& key) { cipher->set_key(key); }
bool valid_keylength(u32bit key_len) const
{ return cipher->valid_keylength(key_len); }
BlockCipherMode(BlockCipher*, const std::string&,
u32bit, u32bit = 0, u32bit = 1);
virtual ~BlockCipherMode() { delete cipher; }
protected:
const u32bit BLOCK_SIZE, BUFFER_SIZE, IV_METHOD;
const std::string mode_name;
BlockCipher* cipher;
SecureVector<byte> buffer, state;
u32bit position;
};
}
#endif
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