Abstract base class for SKINNY tweakable block ciphers with 128-bit blocks. More...

#include <Skinny128.h>

Inheritance diagram for Skinny128_Tweaked:

Public Member Functions
virtual	~Skinny128_Tweaked ()
	Destroys this tweakable Skinny-128 block cipher object after clearing sensitive information.

bool	setTweak (const uint8_t *tweak, size_t len)
	Sets the 128-bit tweak value for this block cipher. More...

void	clear ()
	Clears all security-sensitive state from this block cipher. More...

Public Member Functions inherited from Skinny128
virtual	~Skinny128 ()
	Destroys this Skinny-128 block cipher object after clearing sensitive information.

size_t	blockSize () const
	Size of a Skinny-128 block in bytes. More...

void	encryptBlock (uint8_t output, const uint8_t input)
	Encrypts a single block using this cipher. More...

void	decryptBlock (uint8_t output, const uint8_t input)
	Decrypts a single block using this cipher. More...

Public Member Functions inherited from BlockCipher
	BlockCipher ()
	Constructs a block cipher.

virtual	~BlockCipher ()
	Destroys this block cipher object. More...

virtual size_t	keySize () const =0
	Default size of the key for this block cipher, in bytes. More...

virtual bool	setKey (const uint8_t *key, size_t len)=0
	Sets the key to use for future encryption and decryption operations. More...

Protected Member Functions
	Skinny128_Tweaked (uint32_t *schedule, uint8_t rounds)
	Constructs a tweakable Skinny-128 block cipher object. More...

void	resetTweak ()
	Resets the tweak to all-zeroes. More...

Protected Member Functions inherited from Skinny128
	Skinny128 (uint32_t *schedule, uint8_t rounds)
	Constructs a Skinny-128 block cipher object. More...

void	setTK1 (const uint8_t *key, bool tweaked=false)
	Clears the key schedule and sets it to the schedule for TK1. More...

void	xorTK1 (const uint8_t *key)
	XOR's the key schedule with the schedule for TK1. More...

void	setTK2 (const uint8_t *key)
	XOR's the key schedule with the schedule for TK2. More...

void	setTK3 (const uint8_t *key)
	XOR's the key schedule with the schedule for TK3. More...

Detailed Description

Abstract base class for SKINNY tweakable block ciphers with 128-bit blocks.

This class is abstract. The caller should instantiate Skinny128_256_Tweaked or Skinny128_384_Tweaked to create a SKINNY block cipher with a tweak and a specific key size.

Reference: https://sites.google.com/site/skinnycipher/

See Also: Skinny128_256_Tweaked, Skinny128_384_Tweaked

Definition at line 53 of file Skinny128.h.

Constructor & Destructor Documentation

Skinny128_Tweaked::Skinny128_Tweaked	(	uint32_t *	schedule,
		uint8_t	rounds
	)

protected

Constructs a tweakable Skinny-128 block cipher object.

Parameters

schedule	Points to the schedule data structure in the subclass.
rounds	The number of rounds to perform during encryption/decryption.

Definition at line 1231 of file Skinny128.cpp.

Member Function Documentation

void Skinny128_Tweaked::clear ( )

virtual

Clears all security-sensitive state from this block cipher.

Security-sensitive information includes key schedules and any temporary state that is used by encryptBlock() or decryptBlock() which is stored in the object itself.

See Also: setKey(), encryptBlock(), decryptBlock()

Reimplemented from Skinny128.

Definition at line 1274 of file Skinny128.cpp.

void Skinny128_Tweaked::resetTweak ( )

protected

Resets the tweak to all-zeroes.

This is used by subclass implementations of setKey().

Definition at line 1285 of file Skinny128.cpp.

bool Skinny128_Tweaked::setTweak	(	const uint8_t *	tweak,
		size_t	len
	)

Sets the 128-bit tweak value for this block cipher.

Parameters

tweak	Points to the tweak, and can be NULL if you want a tweak of all-zeroes (the default).
len	Length of tweak in bytes, which must be 16.

Returns: Returns true if the tweak was set or false if len is incorrect.

This function must be called after setKey() as the setKey() call will implicitly set the tweak back to all-zeroes.

See Also: setKey()

Definition at line 1260 of file Skinny128.cpp.

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

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation