Inheritance diagram for HMAC< T >:

Public Member Functions
	HMAC ()
	Construct a HMAC.

	HMAC (const byte *key, size_t length=HMAC_Base::DEFAULT_KEYLENGTH)
	Construct a HMAC. More...

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

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

Public Member Functions inherited from AlgorithmImpl< SimpleKeyingInterfaceImpl< HMAC_Base, HMAC< T > >, HMAC< T > >
std::string	AlgorithmName () const
	The algorithm name. More...

Public Member Functions inherited from SimpleKeyingInterfaceImpl< HMAC_Base, HMAC< T > >
size_t	MinKeyLength () const
	The minimum key length used by the algorithm. More...

size_t	MaxKeyLength () const
	The maximum key length used by the algorithm. More...

size_t	DefaultKeyLength () const
	The default key length used by the algorithm. More...

size_t	GetValidKeyLength (size_t keylength) const
	Provides a valid key length for the algorithm. More...

SimpleKeyingInterface::IV_Requirement	IVRequirement () const
	The default IV requirements for the algorithm. More...

unsigned int	IVSize () const
	The initialization vector length for the algorithm. More...

Public Member Functions inherited from HMAC_Base
	HMAC_Base ()
	Construct a HMAC_Base.

void	UncheckedSetKey (const byte *userKey, unsigned int keylength, const NameValuePairs &params)
	Sets the key for this object without performing parameter validation. More...

void	Restart ()
	Restart the hash. More...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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. More...

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

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. More...

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. More...

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

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. More...

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

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

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

Static Public Member Functions inherited from AlgorithmImpl< SimpleKeyingInterfaceImpl< HMAC_Base, HMAC< T > >, HMAC< T > >
static std::string	StaticAlgorithmName ()
	The algorithm name. More...

Static Public Member Functions inherited from VariableKeyLength< 16, 0, INT_MAX >
static size_t	StaticGetValidKeyLength (size_t keylength)
	Provides a valid key length for the algorithm provided by a static function. More...

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

static const int	BLOCKSIZE =T::BLOCKSIZE

Static Public Attributes inherited from VariableKeyLength< 16, 0, INT_MAX >
static const int	MIN_KEYLENGTH
	The minimum key length used by the algorithm provided as a constant. More...

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

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

static const int	KEYLENGTH_MULTIPLE
	The key length multiple used by the algorithm provided as a constant. More...

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

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

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 HMAC< T >

HMAC.

Template Parameters

T	HashTransformation derived class

HMAC derives from MessageAuthenticationCodeImpl. It calculates the HMAC using HMAC(K, text) = H(K XOR opad, H(K XOR ipad, text)).

See also: HMAC

Since: Crypto++ 2.1

Definition at line 52 of file hmac.h.

Constructor & Destructor Documentation

◆ HMAC()

template<class T >

HMAC< T >::HMAC	(	const byte *	key,
		size_t	length = `HMAC_Base::DEFAULT_KEYLENGTH`
	)

inline

Construct a HMAC.

Parameters

key	the HMAC key
length	the size of the HMAC key

Definition at line 65 of file hmac.h.

Member Function Documentation

◆ AlgorithmName()

template<class T >

std::string HMAC< T >::AlgorithmName ( ) const

inlinevirtual

Provides the name of this algorithm.

Returns: the standard algorithm name

The standard algorithm name can be a name like AES or AES/GCM. Some algorithms do not have standard names yet. For example, there is no standard algorithm name for Shoup's ECIES.

Note: AlgorithmName is not universally implemented yet.

Reimplemented from Algorithm.

Definition at line 69 of file hmac.h.

◆ AlgorithmProvider()

template<class T >

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

inlinevirtual

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 70 of file hmac.h.

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

hmac.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

template<class T> class HMAC< T >

Constructor & Destructor Documentation

◆ HMAC()

Member Function Documentation

◆ AlgorithmName()

◆ AlgorithmProvider()

template<class T>
class HMAC< T >