implements the SHA-256 standard More...

#include <sha.h>

Inheritance diagram for SHA256:

Public Types
typedef BigEndian	ByteOrderClass

typedef word32	HashWordType

Public Member Functions
unsigned int	DigestSize () const
	size of the hash/digest/MAC returned by Final()

Clonable *	Clone () const

std::string	AlgorithmName () const

unsigned int	BlockSize () const

ByteOrder	GetByteOrder () const

unsigned int	OptimalBlockSize () const

unsigned int	OptimalDataAlignment () const

void	Update (const byte *input, size_t length)

byte *	CreateUpdateSpace (size_t &size)

void	Restart ()

void	TruncatedFinal (byte *digest, size_t size)

HashTransformation &	Ref ()
	return a reference to this object, useful for passing a temporary object to a function that takes a non-const reference

virtual void	Final (byte *digest)
	compute hash for current message, then restart for a new message More...

unsigned int	TagSize () const
	same as DigestSize()

virtual void	CalculateDigest (byte digest, const byte input, size_t 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 More...

virtual bool	VerifyDigest (const byte digest, const byte input, size_t 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, size_t digestSize, const byte input, size_t length)
	truncated version of CalculateDigest()

virtual bool	TruncatedVerify (const byte *digest, size_t digestLength)
	truncated version of Verify()

virtual bool	VerifyTruncatedDigest (const byte digest, size_t digestLength, const byte input, size_t length)
	truncated version of VerifyDigest()

Static Public Member Functions
static void	InitState (HashWordType *state)

static void	Transform (word32 digest, const word32 data)

static const char *	StaticAlgorithmName ()

static void	CorrectEndianess (HashWordType out, const HashWordType in, size_t byteCount)

Static Public Attributes
static const int	DIGESTSIZE

static const int	BLOCKSIZE

static CompileAssert<((T_BlockSize &(T_BlockSize-1))==0)>	cryptopp_assert___LINE__

Protected Member Functions
void	HashEndianCorrectedBlock (const word32 *data)

void	Init ()

word32 *	StateBuf ()

word32 *	DataBuf ()

word32	GetBitCountHi () const

word32	GetBitCountLo () const

void	PadLastBlock (unsigned int lastBlockSize, byte padFirst=0x80)

virtual size_t	HashMultipleBlocks (const word32 *input, size_t length)

void	HashBlock (const HashWordType *input)

void	ThrowIfInvalidTruncatedSize (size_t size) const

Protected Attributes
FixedSizeAlignedSecBlock< word32, T_BlockSize/sizeof(word32), T_StateAligned >	m_state

FixedSizeSecBlock< word32, T_BlockSize/sizeof(word32)>	m_data

Detailed Description

implements the SHA-256 standard

Definition at line 20 of file sha.h.

Member Function Documentation

virtual void HashTransformation::Final ( byte * digest )

inlinevirtualinherited

compute hash for current message, then restart for a new message

Precondition: size of digest == DigestSize().

Definition at line 544 of file cryptlib.h.

Referenced by PKCS5_PBKDF2_HMAC< T >::DeriveKey().

virtual bool HashTransformation::Verify ( const byte * digest )

inlinevirtualinherited

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 574 of file cryptlib.h.

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

sha.h

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation