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/*
* ECB Mode
* (C) 1999-2009,2013 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_MODE_ECB_H__
#define BOTAN_MODE_ECB_H__
#include <botan/cipher_mode.h>
#include <botan/block_cipher.h>
#include <botan/mode_pad.h>
namespace Botan {
/**
* ECB mode
*/
class BOTAN_DLL ECB_Mode : public Cipher_Mode
{
public:
std::string name() const override;
size_t update_granularity() const override;
Key_Length_Specification key_spec() const override;
size_t default_nonce_length() const override;
bool valid_nonce_length(size_t n) const override;
void clear() override;
protected:
ECB_Mode(BlockCipher* cipher, BlockCipherModePaddingMethod* padding);
const BlockCipher& cipher() const { return *m_cipher; }
const BlockCipherModePaddingMethod& padding() const { return *m_padding; }
private:
secure_vector<byte> start_raw(const byte nonce[], size_t nonce_len) override;
void key_schedule(const byte key[], size_t length) override;
std::unique_ptr<BlockCipher> m_cipher;
std::unique_ptr<BlockCipherModePaddingMethod> m_padding;
};
/**
* ECB Encryption
*/
class BOTAN_DLL ECB_Encryption : public ECB_Mode
{
public:
ECB_Encryption(BlockCipher* cipher, BlockCipherModePaddingMethod* padding) :
ECB_Mode(cipher, padding) {}
void update(secure_vector<byte>& blocks, size_t offset = 0) override;
void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
size_t output_length(size_t input_length) const override;
size_t minimum_final_size() const override;
};
/**
* ECB Decryption
*/
class BOTAN_DLL ECB_Decryption : public ECB_Mode
{
public:
ECB_Decryption(BlockCipher* cipher, BlockCipherModePaddingMethod* padding) :
ECB_Mode(cipher, padding) {}
void update(secure_vector<byte>& blocks, size_t offset = 0) override;
void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
size_t output_length(size_t input_length) const override;
size_t minimum_final_size() const override;
};
}
#endif
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