AES Class Reference

#include <lib_aes.h>

Detailed Description

An Advanced Encryption Standard (also known as Rijndael) class to encrypt/decrypt data.

Note

Has to be created with Alloc() and destroyed with Free(). Use AutoAlloc to automate the allocation and destruction based on scope.

Private Member Functions
	AES ()
	~AES ()

Alloc/Free
static AES *	Alloc ()
static void	Free (AES *&pAES)

Calculate Data Size
static Int	CalcEncryptedDataSize (Int32 lBlockLength, Int lDataLength)

Init
Bool	Init (Int32 lBlockLength, Int32 lKeyLength)

Encrypt/Decrypt
Bool	Encrypt (void *pData, Int lDataLength, const void *pKey)
Bool	Decrypt (void *pData, Int lDataLength, const void *pKey)

Progress Callback
void	SetProgressCallback (PFNRIJINDAEL_CIPHER_PROGRESS fn, void *pData)

Constructor & Destructor Documentation

AES()

AES ( )

private

~AES()

~AES ( )

private

Member Function Documentation

Alloc()

static AES* Alloc ( )

static

Allocates an AES cipher. Destroy the allocated AES cipher with Free(). Use AutoAlloc to automate the allocation and destruction based on scope.

Returns

The allocated AES cipher, or nullptr if the allocation failed.

Free()

static void Free ( AES *&  pAES )

static

Destructs AES ciphers allocated with Alloc(). Use AutoAlloc to automate the allocation and destruction based on scope.

Parameters

[in,out]

pAES

The AES cipher to destruct. If the pointer is nullptr nothing happens. The pointer is assigned nullptr afterwards.

Init()

Bool Init	(	Int32	lBlockLength,
		Int32	lKeyLength
	)

Initializes the AES cipher to the given block length and key length.

Parameters

[in]	lBlockLength	The block length. Must be 128, 192 or 256 (bit).
[in]	lKeyLength	The key length. Must be 128, 192 or 256 (bit).

Returns

true if initialization was successful, otherwise false.

CalcEncryptedDataSize()

static Int CalcEncryptedDataSize ( Int32  lBlockLength, Int  lDataLength  )

static

Calculates the size of the data block (data size + encryption overhead).

Parameters

[in]	lBlockLength	The block length in bits.
[in]	lDataLength	The size of the data in bytes.

Returns

The size of the data block in bytes.

Encrypt()

Bool Encrypt	(	void *	pData,
		Int	lDataLength,
		const void *	pKey
	)

Encrypts a data block.

Parameters

[in,out]	pData	The data block to encrypt.
[in]	lDataLength	The size of the data block. Usually retrieved with CalcEncryptedDataSize().
[in]	pKey	The encryption key.

Returns

true if encryption was successful, otherwise false.

Decrypt()

Bool Decrypt	(	void *	pData,
		Int	lDataLength,
		const void *	pKey
	)

Decrypts a data block.

Parameters

[in,out]	pData	The encrypted data block.
[in]	lDataLength	The size of the data block.
[in]	pKey	The decryption key.

Returns

true if decryption was successful, otherwise false.

SetProgressCallback()

void SetProgressCallback	(	PFNRIJINDAEL_CIPHER_PROGRESS	fn,
		void *	pData
	)

Sets the encryption/decryption progress hook.

Note

For future use, does nothing, currently.

Parameters

[in]	fn	The progress hook.
[in]	pData	The data pointer passed to the hook.