DMAC message authentication code base class. More...

#include <dmac.h>

Inheritance diagram for DMAC_Base< T >:

Public Member Functions
void	UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs &params)
	Sets the key for this object without performing parameter validation.

void	Update (const byte *input, size_t length)
	Updates a hash with additional input.

void	TruncatedFinal (byte *mac, size_t size)
	Computes the hash of the current message.

unsigned int	DigestSize () const
	Provides the digest size of the hash.

std::string	AlgorithmProvider () const
	Retrieve the provider of this algorithm.

Public Member Functions inherited from SimpleKeyingInterface
virtual size_t	MinKeyLength () const =0
	Returns smallest valid key length.

virtual size_t	MaxKeyLength () const =0
	Returns largest valid key length.

virtual size_t	DefaultKeyLength () const =0
	Returns default key length.

virtual size_t	GetValidKeyLength (size_t keylength) const =0
	Returns a valid key length for the algorithm.

virtual bool	IsValidKeyLength (size_t keylength) const
	Returns whether keylength is a valid key length.

virtual void	SetKey (const byte *key, size_t length, const NameValuePairs &params=g_nullNameValuePairs)
	Sets or reset the key of this object.

void	SetKeyWithRounds (const byte *key, size_t length, int rounds)
	Sets or reset the key of this object.

void	SetKeyWithIV (const byte key, size_t length, const byte iv, size_t ivLength)
	Sets or reset the key of this object.

void	SetKeyWithIV (const byte key, size_t length, const byte iv)
	Sets or reset the key of this object.

virtual IV_Requirement	IVRequirement () const =0
	Minimal requirement for secure IVs.

bool	IsResynchronizable () const
	Determines if the object can be resynchronized.

bool	CanUseRandomIVs () const
	Determines if the object can use random IVs.

bool	CanUsePredictableIVs () const
	Determines if the object can use random but possibly predictable IVs.

bool	CanUseStructuredIVs () const
	Determines if the object can use structured IVs.

virtual unsigned int	IVSize () const
	Returns length of the IV accepted by this object.

unsigned int	DefaultIVLength () const
	Provides the default size of an IV.

virtual unsigned int	MinIVLength () const
	Provides the minimum size of an IV.

virtual unsigned int	MaxIVLength () const
	Provides the maximum size of an IV.

virtual void	Resynchronize (const byte *iv, int ivLength=-1)
	Resynchronize with an IV.

virtual void	GetNextIV (RandomNumberGenerator &rng, byte *iv)
	Retrieves a secure IV for the next message.

Public Member Functions inherited from HashTransformation
HashTransformation &	Ref ()
	Provides a reference to this object.

virtual byte *	CreateUpdateSpace (size_t &size)
	Request space which can be written into by the caller.

virtual void	Final (byte *digest)
	Computes the hash of the current message.

virtual void	Restart ()
	Restart the hash.

unsigned int	TagSize () const
	Provides the tag size of the hash.

virtual unsigned int	BlockSize () const
	Provides the block size of the compression function.

virtual unsigned int	OptimalBlockSize () const
	Provides the input block size most efficient for this hash.

virtual unsigned int	OptimalDataAlignment () const
	Provides input and output data alignment for optimal performance.

virtual void	CalculateDigest (byte digest, const byte input, size_t length)
	Updates the hash with additional input and computes the hash of the current message.

virtual bool	Verify (const byte *digest)
	Verifies the hash of the current message.

virtual bool	VerifyDigest (const byte digest, const byte input, size_t length)
	Updates the hash with additional input and verifies the hash of the current message.

virtual void	CalculateTruncatedDigest (byte digest, size_t digestSize, const byte input, size_t length)
	Updates the hash with additional input and computes the hash of the current message.

virtual bool	TruncatedVerify (const byte *digest, size_t digestLength)
	Verifies the hash of the current message.

virtual bool	VerifyTruncatedDigest (const byte digest, size_t digestLength, const byte input, size_t length)
	Updates the hash with additional input and verifies the hash of the current message.

Public Member Functions inherited from Algorithm
	Algorithm (bool checkSelfTestStatus=true)
	Interface for all crypto algorithms.

virtual std::string	AlgorithmName () const
	Provides the name of this algorithm.

Public Member Functions inherited from Clonable
virtual Clonable *	Clone () const
	Copies this object.

Static Public Member Functions
static std::string	StaticAlgorithmName ()

Static Public Member Functions inherited from SameKeyLengthAs< T, IV_REQ, IV_L >
static size_t	StaticGetValidKeyLength (size_t keylength)
	Provides a valid key length for the algorithm provided by a static function.

Static Public Attributes
static const int	DIGESTSIZE =T::BLOCKSIZE

Static Public Attributes inherited from SameKeyLengthAs< T, IV_REQ, IV_L >
static const int	MIN_KEYLENGTH =T::MIN_KEYLENGTH
	The minimum key length used by the algorithm provided as a constant.

static const int	MAX_KEYLENGTH =T::MAX_KEYLENGTH
	The maximum key length used by the algorithm provided as a constant.

static const int	DEFAULT_KEYLENGTH =T::DEFAULT_KEYLENGTH
	The default key length used by the algorithm provided as a constant.

static const int	IV_REQUIREMENT =IV_REQ
	The default IV requirements for the algorithm provided as a constant.

static const int	IV_LENGTH =IV_L
	The default initialization vector length for the algorithm provided as a constant.

Additional Inherited Members
Public Types inherited from SimpleKeyingInterface
enum	IV_Requirement { UNIQUE_IV = 0 , RANDOM_IV , UNPREDICTABLE_RANDOM_IV , INTERNALLY_GENERATED_IV , NOT_RESYNCHRONIZABLE }
	Secure IVs requirements as enumerated values. More...

Detailed Description

template<class T>
class DMAC_Base< T >

DMAC message authentication code base class.

Template Parameters

T	class derived from BlockCipherDocumentation

Since: Crypto++ 3.1

Definition at line 17 of file dmac.h.

Constructor & Destructor Documentation

◆ ~DMAC_Base()

template<class T >

virtual DMAC_Base< T >::~DMAC_Base ( )

inline

Definition at line 23 of file dmac.h.

◆ DMAC_Base()

template<class T >

DMAC_Base< T >::DMAC_Base ( )

inline

Definition at line 24 of file dmac.h.

Member Function Documentation

◆ StaticAlgorithmName()

template<class T >

static std::string DMAC_Base< T >::StaticAlgorithmName ( )

inlinestatic

Definition at line 21 of file dmac.h.

◆ UncheckedSetKey()

template<class T >

void DMAC_Base< T >::UncheckedSetKey	(	const byte *	key,
		unsigned int	length,
		const NameValuePairs &	params )

virtual

Sets the key for this object without performing parameter validation.

Parameters

key	a byte buffer used to key the cipher
length	the length of the byte buffer
params	additional parameters passed as NameValuePairs

key must be at least DEFAULT_KEYLENGTH in length.

Implements SimpleKeyingInterface.

Definition at line 69 of file dmac.h.

◆ Update()

template<class T >

void DMAC_Base< T >::Update	(	const byte *	input,
		size_t	length )

virtual

Updates a hash with additional input.

Parameters

input	the additional input as a buffer
length	the size of the buffer, in bytes

Implements HashTransformation.

Definition at line 80 of file dmac.h.

◆ TruncatedFinal()

template<class T >

void DMAC_Base< T >::TruncatedFinal	(	byte *	digest,
		size_t	digestSize )

virtual

Computes the hash of the current message.

Parameters

digest	a pointer to the buffer to receive the hash
digestSize	the size of the truncated digest, in bytes

TruncatedFinal() calls Final() and then copies digestSize bytes to digest. The hash is restarted the hash for the next message.

Precondition: COUNTOF(digest) <= DigestSize() or COUNTOF(digest) <= HASH::DIGESTSIZE ensures the output byte buffer is a valid size.

Implements HashTransformation.

Definition at line 87 of file dmac.h.

◆ DigestSize()

template<class T >

unsigned int DMAC_Base< T >::DigestSize ( ) const

inlinevirtual

Provides the digest size of the hash.

Returns: the digest size of the hash.

Implements HashTransformation.

Definition at line 29 of file dmac.h.

◆ AlgorithmProvider()

template<class T >

std::string DMAC_Base< T >::AlgorithmProvider ( ) const

virtual

Retrieve the provider of this algorithm.

Returns: the algorithm provider

The algorithm provider can be a name like "C++", "SSE", "NEON", "AESNI", "ARMv8" and "Power8". C++ is standard C++ code. Other labels, like SSE, usually indicate a specialized implementation using instructions from a higher instruction set architecture (ISA). Future labels may include external hardware like a hardware security module (HSM).

Generally speaking Wei Dai's original IA-32 ASM code falls under "SSE2". Labels like "SSSE3" and "SSE4.1" follow after Wei's code and use intrinsics instead of ASM.

Algorithms which combine different instructions or ISAs provide the dominant one. For example on x86 AES/GCM returns "AESNI" rather than "CLMUL" or "AES+SSE4.1" or "AES+CLMUL" or "AES+SSE4.1+CLMUL".

Note: Provider is not universally implemented yet.

Since: Crypto++ 8.0

Reimplemented from Algorithm.

Definition at line 44 of file dmac.h.

Member Data Documentation

◆ DIGESTSIZE

template<class T >

const int DMAC_Base< T >::DIGESTSIZE =T::BLOCKSIZE

static

Definition at line 20 of file dmac.h.

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

dmac.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~DMAC_Base()

◆ DMAC_Base()

Member Function Documentation

◆ StaticAlgorithmName()

◆ UncheckedSetKey()

◆ Update()

◆ TruncatedFinal()

◆ DigestSize()

◆ AlgorithmProvider()

Member Data Documentation

◆ DIGESTSIZE