Abstract base class for SKINNY block ciphers with 64-bit blocks. More...

#include <Skinny64.h>

Inheritance diagram for Skinny64:

Public Member Functions
virtual	~Skinny64 ()
	Destroys this Skinny-64 block cipher object after clearing sensitive information.

size_t	blockSize () const
	Size of a Skinny-64 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
	Skinny64 (uint32_t *schedule, uint8_t rounds)
	Constructs a Skinny-64 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 64-bit blocks.

This class is abstract. The caller should instantiate Skinny64_64, Skinny64_128, or Skinny64_192 to create a SKINNY block cipher with a specific key size. Or instantiate Skinny64_128_Tweaked or Skinny64_192_Tweaked for a tweakable version of the SKINNY block cipher.

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

See Also: Skinny64_64, Skinny64_128, Skinny64_192, Skinny64_Tweaked

Definition at line 28 of file Skinny64.h.

Constructor & Destructor Documentation

Skinny64::Skinny64	(	uint32_t *	schedule,
		uint8_t	rounds
	)

protected

Constructs a Skinny-64 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 Skinny64.cpp.

Member Function Documentation

size_t Skinny64::blockSize ( ) const

virtual

Size of a Skinny-64 block in bytes.

Returns: Always returns 8.

Implements BlockCipher.

Definition at line 126 of file Skinny64.cpp.

void Skinny64::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 Skinny64_Tweaked.

Definition at line 639 of file Skinny64.cpp.

void Skinny64::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 499 of file Skinny64.cpp.

void Skinny64::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 359 of file Skinny64.cpp.

void Skinny64::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 701 of file Skinny64.cpp.

void Skinny64::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 895 of file Skinny64.cpp.

void Skinny64::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 967 of file Skinny64.cpp.

void Skinny64::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 796 of file Skinny64.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