cipher.hpp

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#ifndef CIPHER_HPP
#define CIPHER_HPP
 
#include <cstddef>
#include <cstdint>


constexpr size_t BLOCK_SIZE = 16;
constexpr size_t KEY_SIZE = 16;
constexpr int ROUNDS = 16;

class BlockCipher {
public:
    virtual ~BlockCipher() = default;

    virtual void encrypt_block(const uint8_t *in, uint8_t *out) const = 0;

    virtual void decrypt_block(const uint8_t *in, uint8_t *out) const = 0;
};

class CustomCipher : public BlockCipher {
public:
    explicit CustomCipher(const uint8_t master_key[KEY_SIZE]);
 
    void encrypt_block(const uint8_t *in, uint8_t *out) const override;
    void decrypt_block(const uint8_t *in, uint8_t *out) const override;
 
private:
    uint64_t rk_[ROUNDS];  
};
 
#endif