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

#include <Skinny128.h>

Inheritance diagram for Skinny128:

Public Member Functions
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...

void	clear ()
	Clears all security-sensitive state from this block 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 (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 block ciphers with 128-bit blocks.

This class is abstract. The caller should instantiate Skinny128_128, Skinny128_256, or Skinny128_384 to create a SKINNY block cipher with a specific key size. Or instantiate Skinny128_256_Tweaked or Skinny128_384_Tweaked for a tweakable version of the SKINNY block cipher.

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

See Also: Skinny128_128, Skinny128_256, Skinny128_384, Skinny128_Tweaked

Definition at line 28 of file Skinny128.h.

Constructor & Destructor Documentation

Skinny128::Skinny128	(	uint32_t *	schedule,
		uint8_t	rounds
	)

protected

Constructs a 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 109 of file Skinny128.cpp.

Member Function Documentation

size_t Skinny128::blockSize ( ) const

virtual

Size of a Skinny-128 block in bytes.

Returns: Always returns 16.

Implements BlockCipher.

Definition at line 126 of file Skinny128.cpp.

void Skinny128::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()

Implements BlockCipher.

Reimplemented in Skinny128_Tweaked.

Definition at line 717 of file Skinny128.cpp.

void Skinny128::decryptBlock	(	uint8_t *	output,
		const uint8_t *	input
	)

virtual

Decrypts a single block using this cipher.

Parameters

output	The output buffer to put the plaintext into. Must be at least blockSize() bytes in length.
input	The input buffer to read the ciphertext from which is allowed to overlap with output. Must be at least blockSize() bytes in length.

See Also: encryptBlock(), blockSize()

Implements BlockCipher.

Definition at line 531 of file Skinny128.cpp.

void Skinny128::encryptBlock	(	uint8_t *	output,
		const uint8_t *	input
	)

virtual

Encrypts a single block using this cipher.

Parameters

output	The output buffer to put the ciphertext into. Must be at least blockSize() bytes in length.
input	The input buffer to read the plaintext from which is allowed to overlap with output. Must be at least blockSize() bytes in length.

See Also: decryptBlock(), blockSize()

Implements BlockCipher.

Definition at line 343 of file Skinny128.cpp.

void Skinny128::setTK1	(	const uint8_t *	key,
		bool	tweaked = `false`
	)

protected

Clears the key schedule and sets it to the schedule for TK1.

Parameters

key	Points to the 16 bytes of TK1.
tweaked	Set to true if the subclass uses tweaks.

Definition at line 773 of file Skinny128.cpp.

void Skinny128::setTK2 ( const uint8_t * key )

protected

XOR's the key schedule with the schedule for TK2.

Parameters

key	Points to the 16 bytes of TK2.

Definition at line 1014 of file Skinny128.cpp.

void Skinny128::setTK3 ( const uint8_t * key )

protected

XOR's the key schedule with the schedule for TK3.

Parameters

key	Points to the 16 bytes of TK3.

Definition at line 1122 of file Skinny128.cpp.

void Skinny128::xorTK1 ( const uint8_t * key )

protected

XOR's the key schedule with the schedule for TK1.

Parameters

key	Points to the 16 bytes of TK1.

This function is used to adjust the tweak for the tweakable versions of the SKINNY block cipher.

Definition at line 891 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