Computes the Tiger hash from a byte stream. More...

#include <tiger.hpp>

Inheritance diagram for libxcks::Tiger:

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Collaboration diagram for libxcks::Tiger:

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Public Member Functions
	Tiger ()
	Default constructor. More...

void	reset () override
	Resets the Tiger hash to initial state of computation. More...

uint8_t *	getValue (uint8_t *buffer) const override
	Returns the Tiger hash value in the first 24 bytes of the given address. More...

size_t	getSize () const override
	Returns the minimal size to allocate in memory to store the hash with the getValue(buffer) method. More...

void	update (const uint8_t *buf, size_t len) override
	Updates the Tiger hash with specified array of bytes. More...

std::string	getName () const override
	Returns the name of the checksum or the hash algorithm. More...

ChecksumAlgoId	getID () const override
	Returns an unique identifier for the checksum or the hash algorithm. More...

Public Member Functions inherited from libxcks::ChecksumEx
std::string	toString (const bool hexInUpperCase=false) const override
	Returns the hash value has a string. More...

Public Member Functions inherited from libxcks::Checksum
virtual	~Checksum ()
	Destructor. More...

virtual ArrayString	getAltNames () const
	Returns the alternative name(s) of the checksum or the hash algorithm. More...

Static Public Member Functions
static std::string	getHashName ()
	Returns the name of the hash algorithm. More...

static constexpr ChecksumAlgoId	getIdentifier ()
	Returns an unique identifier for the hash algorithm. More...

static Checksum *	getNewInstance ()
	Gets a new instance of this class. More...

Static Public Member Functions inherited from libxcks::Checksum
static ArrayString	getAlternativeNames ()
	Returns the alternative name(s) of the checksum or the hash algorithm. More...

Protected Member Functions
void	finish ()
	Process the remaining bytes in the internal buffer and the usual prolog according to the standard. More...

void	transform (uint8_t *data)
	Transform the message X which consists of 8 64-bit-words. More...

void	round (uint64_t &a, uint64_t &b, uint64_t &c, uint64_t x, int mul)
	Helper function for Tiger's computing. More...

void	pass (uint64_t &a, uint64_t &b, uint64_t &c, uint64_t *x, int mul)
	Helper function for Tiger's computing. More...

void	key_schedule (uint64_t *x)
	Helper function for Tiger's computing. More...

Protected Attributes
uint64_t	a
	First part of the state of computation. More...

uint64_t	b
	Second part of the state of computation. More...

uint64_t	c
	Third part of the state of computation. More...

uint32_t	nblocks
	Number of blocks. More...

int	count
	Current size of the input buffer. More...

uint8_t	ibuffer [64]
	Input buffer. More...

Static Protected Attributes
static const uint64_t	sbox1 [256]
	Table used to compute the Tiger hash. More...

static const uint64_t	sbox2 [256]
	Table used to compute the Tiger hash. More...

static const uint64_t	sbox3 [256]
	Table used to compute the Tiger hash. More...

static const uint64_t	sbox4 [256]
	Table used to compute the Tiger hash. More...

Additional Inherited Members
Static Protected Member Functions inherited from libxcks::LibgcryptHash
static uint32_t	rol (uint32_t x, int n)
	Rotate the 32 bit unsigned integer `x` by `n` bits left. More...

static uint32_t	ror (uint32_t x, int n)
	Rotate the 32 bit unsigned integer `x` by `n` bits right. More...

Static Protected Member Functions inherited from libxcks::ChecksumEx
static uint32_t	swapOnLE (const uint32_t value)
	Swaps bytes on little endian architectures. More...

static uint32_t	swapOnBE (const uint32_t value)
	Swaps bytes on big endian architectures. More...

static uint64_t	swapOnLE (const uint64_t value)
	Swaps bytes on little endian architectures. More...

static uint64_t	swapOnBE (const uint64_t value)
	Swaps bytes on big endian architectures. More...

Detailed Description

Computes the Tiger hash from a byte stream.

This class is a rewrite in C++ of the Tiger hash computing algorithm present in the Libgcrypt. Please see the GNU Privacy Guard project website for more informations.

Using this class in very simple:
Use the update method to provide to the class the bytes for computing the hash.

The Tiger hash value can be gotten by two ways:

The getValue method which puts the Tiger hash value in an array of 24 bytes.
The toString method which returns the Tiger hash value in a string.

The Tiger hash computing can be reseted by the reset method.

Definition at line 56 of file tiger.hpp.

Constructor & Destructor Documentation

◆ Tiger()

libxcks::Tiger::Tiger ( )

Default constructor.

Definition at line 579 of file tiger.cpp.

Member Function Documentation

◆ finish()

void libxcks::Tiger::finish ( )

protected

Process the remaining bytes in the internal buffer and the usual prolog according to the standard.

Definition at line 604 of file tiger.cpp.

◆ getHashName()

static std::string libxcks::Tiger::getHashName ( )

inlinestatic

Returns the name of the hash algorithm.

Returns: The name of the hash algorithm.

Definition at line 194 of file tiger.hpp.

◆ getID()

ChecksumAlgoId libxcks::Tiger::getID ( ) const

inlineoverridevirtual

Returns an unique identifier for the checksum or the hash algorithm.

Remarks: The unique ID should be the CRC32 checksum of the algorithm's name returned by getName() but it's only a convention.

Returns: An unique identifier for the checksum or the hash algorithm.

Implements libxcks::Checksum.

Definition at line 184 of file tiger.hpp.

◆ getIdentifier()

static constexpr ChecksumAlgoId libxcks::Tiger::getIdentifier ( )

inlinestaticconstexpr

Returns an unique identifier for the hash algorithm.

Remarks: The unique ID should be the CRC32 checksum of the algorithm's name returned by getHashName() but it's only a convention.

Returns: An unique identifier for the hash algorithm.

Definition at line 208 of file tiger.hpp.

◆ getName()

std::string libxcks::Tiger::getName ( ) const

inlineoverridevirtual

Returns the name of the checksum or the hash algorithm.

Returns: The name of the checksum or the hash algorithm.

Implements libxcks::Checksum.

Definition at line 170 of file tiger.hpp.

◆ getNewInstance()

static Checksum* libxcks::Tiger::getNewInstance ( )

inlinestatic

Gets a new instance of this class.

The caller is responsible of the deletion of the instance with the delete operator.

Returns: A new instance of this class.

Definition at line 221 of file tiger.hpp.

◆ getSize()

size_t libxcks::Tiger::getSize ( ) const

inlineoverridevirtual

Returns the minimal size to allocate in memory to store the hash with the getValue(buffer) method.

Returns: The minimal size to allocate in memory to store the hash with the getValue(buffer) method.

Implements libxcks::Checksum.

Definition at line 102 of file tiger.hpp.

◆ getValue()

uint8_t * libxcks::Tiger::getValue ( uint8_t * buffer ) const

overridevirtual

Returns the Tiger hash value in the first 24 bytes of the given address.

Parameters

buffer The buffer where the Tiger hash value will be stored.

Returns: The address of the buffer.

Remarks: The memory for the 24 bytes must have been allocated before calling this method.

Implements libxcks::Checksum.

Definition at line 824 of file tiger.cpp.

◆ key_schedule()

void libxcks::Tiger::key_schedule ( uint64_t * x )

protected

Helper function for Tiger's computing.

I don't really want to know what it does. :o)

Parameters

x	A parameter.

Definition at line 799 of file tiger.cpp.

◆ pass()

void libxcks::Tiger::pass	(	uint64_t &	a,
		uint64_t &	b,
		uint64_t &	c,
		uint64_t *	x,
		int	mul
	)

protected

Helper function for Tiger's computing.

I don't really want to know what it does. :o)

Parameters

a	A parameter.
b	Another parameter.
c	Another parameter.
x	Another parameter.
mul	Another parameter.

Definition at line 782 of file tiger.cpp.

◆ reset()

void libxcks::Tiger::reset ( )

overridevirtual

Resets the Tiger hash to initial state of computation.

Implements libxcks::LibgcryptHash.

Definition at line 589 of file tiger.cpp.

◆ round()

void libxcks::Tiger::round	(	uint64_t &	a,
		uint64_t &	b,
		uint64_t &	c,
		uint64_t	x,
		int	mul
	)

protected

Helper function for Tiger's computing.

I don't really want to know what it does. :o)

Parameters

a	A parameter.
b	Another parameter.
c	Another parameter.
x	Another parameter.
mul	Another parameter.

Definition at line 763 of file tiger.cpp.

◆ transform()

void libxcks::Tiger::transform ( uint8_t * data )

protected

Transform the message X which consists of 8 64-bit-words.

It is assumed that data has the lenght of 8 64-bit-words.

Parameters

data	The data to process.

Definition at line 712 of file tiger.cpp.

◆ update()

void libxcks::Tiger::update	(	const uint8_t *	buf,
		size_t	len
	)

overridevirtual

Updates the Tiger hash with specified array of bytes.

Parameters

buf	The byte array to update the Tiger hash with.
len	The number of bytes to use for the update.

Implements libxcks::Checksum.

Definition at line 671 of file tiger.cpp.

Member Data Documentation

◆ a

uint64_t libxcks::Tiger::a

protected

First part of the state of computation.

Definition at line 60 of file tiger.hpp.

◆ b

uint64_t libxcks::Tiger::b

protected

Second part of the state of computation.

Definition at line 61 of file tiger.hpp.

◆ c

uint64_t libxcks::Tiger::c

protected

Third part of the state of computation.

Definition at line 62 of file tiger.hpp.

◆ count

int libxcks::Tiger::count

protected

Current size of the input buffer.

Definition at line 65 of file tiger.hpp.

◆ ibuffer

uint8_t libxcks::Tiger::ibuffer[64]

protected

Input buffer.

Definition at line 66 of file tiger.hpp.

◆ nblocks

uint32_t libxcks::Tiger::nblocks

protected

Number of blocks.

Definition at line 64 of file tiger.hpp.

◆ sbox1

const uint64_t libxcks::Tiger::sbox1

staticprotected

Table used to compute the Tiger hash.

Definition at line 69 of file tiger.hpp.

◆ sbox2

const uint64_t libxcks::Tiger::sbox2

staticprotected

Table used to compute the Tiger hash.

Definition at line 70 of file tiger.hpp.

◆ sbox3

const uint64_t libxcks::Tiger::sbox3

staticprotected

Table used to compute the Tiger hash.

Definition at line 71 of file tiger.hpp.

◆ sbox4

const uint64_t libxcks::Tiger::sbox4

staticprotected

Table used to compute the Tiger hash.

Definition at line 72 of file tiger.hpp.

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

src/algos/tiger.hpp
src/algos/tiger.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Tiger()

Member Function Documentation

◆ finish()

◆ getHashName()

◆ getID()

◆ getIdentifier()

◆ getName()

◆ getNewInstance()

◆ getSize()

◆ getValue()

◆ key_schedule()

◆ pass()

◆ reset()

◆ round()

◆ transform()

◆ update()

Member Data Documentation

◆ a

◆ b

◆ c

◆ count

◆ ibuffer

◆ nblocks

◆ sbox1

◆ sbox2

◆ sbox3

◆ sbox4