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/*
* Filter interface for ciphers
* (C) 2013,2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_TRANSFORM_FILTER_H_
#define BOTAN_TRANSFORM_FILTER_H_
#include <botan/cipher_mode.h>
#include <botan/key_filt.h>
#include <botan/buf_filt.h>
namespace Botan {
/**
* Filter interface for cipher modes
*/
class BOTAN_PUBLIC_API(2,0) Cipher_Mode_Filter final : public Keyed_Filter,
private Buffered_Filter
{
public:
explicit Cipher_Mode_Filter(Cipher_Mode* t);
explicit Cipher_Mode_Filter(std::unique_ptr<Cipher_Mode> t) :
Cipher_Mode_Filter(t.release()) {}
void set_iv(const InitializationVector& iv) override;
void set_key(const SymmetricKey& key) override;
Key_Length_Specification key_spec() const override;
bool valid_iv_length(size_t length) const override;
std::string name() const override;
private:
void write(const uint8_t input[], size_t input_length) override;
void start_msg() override;
void end_msg() override;
void buffered_block(const uint8_t input[], size_t input_length) override;
void buffered_final(const uint8_t input[], size_t input_length) override;
std::unique_ptr<Cipher_Mode> m_mode;
std::vector<uint8_t> m_nonce;
secure_vector<uint8_t> m_buffer;
};
// deprecated aliases, will be removed before 2.0
typedef Cipher_Mode_Filter Transform_Filter;
typedef Transform_Filter Transformation_Filter;
}
#endif
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