Rijndael::CFB< keybits > Class Template Reference

#include <rijndael.h>

Inheritance diagram for Rijndael::CFB< keybits >:

Public Types
typedef Byte	Key [KEYLENGTH(keybits)]
typedef Block	IV
Public Types inherited from Rijndael::ECB< keybits >
typedef Byte	Key [KEYLENGTH(keybits)]

Public Member Functions
	CFB (const Key key, const IV iv)
	Initialize encryption/decription state. More...
void	encrypt (const Block plaintext, Block ciphertext)
	Encrypt a block of 16 bytes, with IV (CFB mode) More...
void	decrypt (const Block ciphertext, Block plaintext)
	Decrypt a block of 16 bytes, with IV (CFB mode) More...
Public Member Functions inherited from Rijndael::ECB< keybits >
	ECB ()
void	setupEncrypt (const Key key)
	Initialize encryption state. More...
void	encrypt (const Block plaintext, Block ciphertext)
	Encrypt a block of 16 bytes. More...
void	setupDecrypt (const Key key)
	Initialize decryption state. More...
void	decrypt (const Block ciphertext, Block plaintext)
	Decrypt a block of 16 bytes. More...
Word32	get_random ()
	Crypto base PRNG. More...

Member Typedef Documentation

template<int keybits>

typedef Block Rijndael::CFB< keybits >::IV

template<int keybits>

typedef Byte Rijndael::CFB< keybits >::Key[KEYLENGTH(keybits)]

Constructor & Destructor Documentation

template<int keybits>

Rijndael::CFB< keybits >::CFB	(	const Key	key,
		const IV	iv
	)

Initialize encryption/decription state.

Parameters

[in]

key

AES key, where length is: keybits number of bytes 128 16 192 24 256 32

See also

KEYLENGTH macro.

Parameters

[in]

iv

initialization vector. Some randomness needed to enforce the sequence is non replayable.

Rijndael::CFB<128>::Key key = "my big secret";
Rijndael::CFB<128> enc(key, iv);
...
Rijndael::Block plain = "Hello World!";
Rijndael::Block cipher, again;
enc.encrypt(plain, cipher);
enc.decrypt(cipher, again);

Member Function Documentation

template<int keybits>

void Rijndael::CFB< keybits >::decrypt	(	const Block	ciphertext,
		Block	plaintext
	)

Decrypt a block of 16 bytes, with IV (CFB mode)

Parameters

[in]	ciphertext	The 16 bytes block of data to decrypt.
[out]	plaintext	Space to store the 16 bytes result block.

template<int keybits>

void Rijndael::CFB< keybits >::encrypt	(	const Block	plaintext,
		Block	ciphertext
	)

Encrypt a block of 16 bytes, with IV (CFB mode)

Parameters

[in]	plaintext	The 16 bytes block to encrypt.
[out]	ciphertext	Space to store the 16 bytes of encrypted data.

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The documentation for this class was generated from the following file:

• AES/rijndael.h