SHA-256 message digest. More...

#include <sha.h>

Inheritance diagram for SHA256:

Public Member Functions
CRYPTOPP_STATIC_CONSTEXPR const char *CRYPTOPP_API	StaticAlgorithmName ()
	The algorithm name.

std::string	AlgorithmProvider () const

Public Member Functions inherited from IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA256, 32, true >
	CRYPTOPP_CONSTANT (DIGESTSIZE=T_DigestSize ? T_DigestSize :T_StateSize)

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

Public Member Functions inherited from ClonableImpl< DERIVED, BASE >
Clonable *	Clone () const
	Create a copy of this object.

Static Public Member Functions
static void CRYPTOPP_API	InitState (HashWordType *state)
	Initialize state array.

static void CRYPTOPP_API	Transform (HashWordType digest, const HashWordType data)
	Operate the hash.

Protected Member Functions
size_t	HashMultipleBlocks (const HashWordType *input, size_t length)

Protected Member Functions inherited from IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA256, 32, true >
void	HashEndianCorrectedBlock (const word32 *data)

void	Init ()

word32 *	StateBuf ()

Additional Inherited Members
Protected Types inherited from IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA256, 32, true >
enum

Protected Attributes inherited from IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA256, 32, true >
FixedSizeAlignedSecBlock< word32, Blocks, T_StateAligned >	m_state

Detailed Description

SHA-256 message digest.

See also: SHA-256

Since: SHA2 since Crypto++ 4.0, ARMv8 SHA since Crypto++ 6.0, Intel SHA since Crypto++ 6.0, Power8 SHA since Crypto++ 6.1

Definition at line 64 of file sha.h.

Member Function Documentation

◆ AlgorithmProvider()

std::string SHA256::AlgorithmProvider ( ) const

Definition at line 853 of file sha.cpp.

◆ HashMultipleBlocks()

size_t SHA256::HashMultipleBlocks	(	const HashWordType *	input,
		size_t	length
	)

protected

Definition at line 916 of file sha.cpp.

◆ InitState()

void SHA256::InitState ( HashWordType * state )

static

Initialize state array.

Parameters

state the state of the hash

InitState sets a state array to SHA256 initial values

Hashes which derive from IteratedHashWithStaticTransform provide static member functions InitState and Transform. External classes, like SEAL and MDC, can initialize state with a user provided key and operate the hash on the data with the user supplied state.

Note: On Intel platforms the state array must be 16-byte aligned for SSE2.

Definition at line 509 of file sha.cpp.

◆ StaticAlgorithmName()

CRYPTOPP_STATIC_CONSTEXPR const char *CRYPTOPP_API SHA256::StaticAlgorithmName ( )

inline

The algorithm name.

Returns: C-style string "SHA-256"

Definition at line 90 of file sha.h.

◆ Transform()

void SHA256::Transform	(	HashWordType *	digest,
		const HashWordType *	data
	)

static

Operate the hash.

Parameters

digest	the state of the hash
data	the data to be digested

Transform operates the hash on data. When the call is invoked digest holds initial state. Upon return digest holds the hash or updated state.

Hashes which derive from IteratedHashWithStaticTransform provide static member functions InitState and Transform. External classes, like SEAL and MDC, can initialize state with a user provided key and operate the hash on the data with the user supplied state.

Note: On Intel platforms the state array and data must be 16-byte aligned for SSE2.

Definition at line 858 of file sha.cpp.

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

G:/work/subversion/scol-technologies/trunk/scol/plugins/security/cryptopp/sha.h
G:/work/subversion/scol-technologies/trunk/scol/plugins/security/cryptopp/sha.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions