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// AesCfb128Decryptor.h
// Declares the cAesCfb128Decryptor class decrypting data using AES CFB-128
#pragma once
#if PLATFORM_CRYPTOGRAPHY && defined(_WIN32)
#include <wincrypt.h>
#else
#include "mbedtls/aes.h"
#endif
/** Decrypts data using the AES / CFB 128 algorithm */
class cAesCfb128Decryptor
{
public:
cAesCfb128Decryptor(void);
~cAesCfb128Decryptor();
/** Initializes the decryptor with the specified Key / IV */
void Init(const Byte a_Key[16], const Byte a_IV[16]);
/** Decrypts a_Length bytes of the encrypted data in-place; produces a_Length output bytes */
void ProcessData(std::byte * a_EncryptedIn, size_t a_Length);
/** Returns true if the object has been initialized with the Key / IV */
bool IsValid(void) const { return m_IsValid; }
protected:
#if PLATFORM_CRYPTOGRAPHY && defined(_WIN32)
HCRYPTPROV m_Aes;
HCRYPTKEY m_Key;
#else
mbedtls_aes_context m_Aes;
#endif
/** The InitialVector, used by the CFB mode decryption */
Byte m_IV[16];
/** Indicates whether the object has been initialized with the Key / IV */
bool m_IsValid;
} ;
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