#include <hmac.h>

Inheritance diagram for HMAC_Base:

Public Member Functions
	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.

void	Restart ()
	Restart the hash.

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

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

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.

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	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.

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

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

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...

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.

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.

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

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

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

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

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

Detailed Description

HMAC information.

HMAC_Base derives from VariableKeyLength and MessageAuthenticationCode

Since: Crypto++ 2.1

Definition at line 17 of file hmac.h.

Constructor & Destructor Documentation

◆ ~HMAC_Base()

virtual HMAC_Base::~HMAC_Base ( )

inlinevirtual

Definition at line 20 of file hmac.h.

◆ HMAC_Base()

HMAC_Base::HMAC_Base ( )

inline

Construct a HMAC_Base.

Definition at line 23 of file hmac.h.

Member Function Documentation

◆ UncheckedSetKey()

void HMAC_Base::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.

◆ Restart()

void HMAC_Base::Restart ( )

virtual

Restart the hash.

Discards the current state, and restart for a new message

Reimplemented from HashTransformation.

◆ Update()

void HMAC_Base::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.

◆ TruncatedFinal()

void HMAC_Base::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.

◆ OptimalBlockSize()

unsigned int HMAC_Base::OptimalBlockSize ( ) const

inlinevirtual

Provides the input block size most efficient for this hash.

Returns: The input block size that is most efficient for the cipher

The base class implementation returns MandatoryBlockSize().

Optimal input length is n * OptimalBlockSize() - GetOptimalBlockSizeUsed() for any n > 0.

Reimplemented from HashTransformation.

Definition at line 29 of file hmac.h.

◆ DigestSize()

unsigned int HMAC_Base::DigestSize ( ) const

inlinevirtual

Provides the digest size of the hash.

Returns: the digest size of the hash.

Implements HashTransformation.

Definition at line 30 of file hmac.h.

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

hmac.h

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~HMAC_Base()

◆ HMAC_Base()

Member Function Documentation

◆ UncheckedSetKey()

◆ Restart()

◆ Update()

◆ TruncatedFinal()

◆ OptimalBlockSize()

◆ DigestSize()