TruncatedHashTemplate< T > Class Template Reference

#include <trunhash.h>

Inheritance diagram for TruncatedHashTemplate< T >:

List of all members.

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Detailed Description

template<class T>
class TruncatedHashTemplate< T >

construct new HashModule with smaller DigestSize() from existing one

Definition at line 19 of file trunhash.h.

Public Member Functions
	TruncatedHashTemplate (T hm, unsigned int digestSize)
	TruncatedHashTemplate (const byte *key, unsigned int keyLength, unsigned int digestSize)
	TruncatedHashTemplate (unsigned int digestSize)
void	Update (const byte *input, unsigned int length)
	process more input
unsigned int	DigestSize () const
	size of the hash returned by Final()
void	TruncatedFinal (byte *digest, unsigned int digestSize)
	truncated version of Final()
bool	TruncatedVerify (const byte *digest, unsigned int digestLength)
	truncated version of Verify()
virtual byte *	CreateUpdateSpace (unsigned int &size)
	request space to write input into
virtual void	Final (byte *digest)
	compute hash for current message, then restart for a new message
virtual void	Restart ()
	discard the current state, and restart with a new message
virtual unsigned int	BlockSize () const
	block size of underlying compression function, or 0 if not block based
virtual unsigned int	OptimalBlockSize () const
	input to Update() should have length a multiple of this for optimal speed
virtual unsigned int	OptimalDataAlignment () const
	returns how input should be aligned for optimal performance
virtual void	CalculateDigest (byte *digest, const byte *input, unsigned int length)
	use this if your input is in one piece and you don't want to call Update() and Final() separately
virtual bool	Verify (const byte *digest)
	verify that digest is a valid digest for the current message, then reinitialize the object
virtual bool	VerifyDigest (const byte *digest, const byte *input, unsigned int length)
	use this if your input is in one piece and you don't want to call Update() and Verify() separately
virtual void	CalculateTruncatedDigest (byte *digest, unsigned int digestSize, const byte *input, unsigned int length)
	truncated version of CalculateDigest()
virtual bool	VerifyTruncatedDigest (const byte *digest, unsigned int digestLength, const byte *input, unsigned int length)
	truncated version of VerifyDigest()
virtual std::string	AlgorithmName () const
	returns name of this algorithm, not universally implemented yet
virtual Clonable *	Clone () const
	this is not implemented by most classes yet
Protected Member Functions
void	ThrowIfInvalidTruncatedSize (unsigned int size) const

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Member Function Documentation

virtual void HashTransformation::Final (  byte *  digest  )  [inline, virtual, inherited]

compute hash for current message, then restart for a new message Precondition: size of digest == DigestSize(). Definition at line 537 of file cryptlib.h. Referenced by PKCS5_PBKDF2_HMAC< T >::DeriveKey(), HashFilter::Put2(), and HMAC_Base::TruncatedFinal().

virtual bool HashTransformation::Verify (  const byte *  digest  )  [inline, virtual, inherited]

verify that digest is a valid digest for the current message, then reinitialize the object Default implementation is to call Final() and do a bitwise comparison between its output and digest. Definition at line 563 of file cryptlib.h.

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

• trunhash.h

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