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# SHA224 Class Reference

`#include <sha.h>`

Inheritance diagram for SHA224:

List of all members.

## Detailed Description

implements the SHA-224 standard

Definition at line 32 of file sha.h.

## Public Types
typedef BigEndian | ByteOrderClass
typedef word32 | HashWordType
## Public Member Functions
unsigned int | DigestSize () const
| size of the hash returned by Final()
Clonable * | Clone () const
| this is not implemented by most classes yet
std::string | AlgorithmName () const
| returns name of this algorithm, not universally implemented yet
ByteOrder | GetByteOrder () const
| IteratedHashBase ()
unsigned int | BlockSize () const
| block size of underlying compression function, or 0 if not block based
unsigned int | OptimalBlockSize () const
| input to Update() should have length a multiple of this for optimal speed
unsigned int | OptimalDataAlignment () const
| returns how input should be aligned for optimal performance
void | Update (const byte *input, unsigned int length)
| process more input
byte * | CreateUpdateSpace (unsigned int &size)
| request space to write input into
void | Restart ()
| discard the current state, and restart with a new message
void | TruncatedFinal (byte *digest, unsigned int size)
| truncated version of Final()
virtual void | Final (byte *digest)
| compute hash for current message, then restart for a new message
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 | TruncatedVerify (const byte *digest, unsigned int digestLength)
| truncated version of Verify()
virtual bool | VerifyTruncatedDigest (const byte *digest, unsigned int digestLength, const byte *input, unsigned int 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 *__cdecl | StaticAlgorithmName ()
static void | CorrectEndianess (HashWordType *out, const HashWordType *in, unsigned int byteCount)
## Static Public Attributes
static CompileAssert<((BLOCKSIZE &(BLOCKSIZE-1))==0) | cryptopp_assert___LINE__ )
## Protected Member Functions
| IteratedHashWithStaticTransform ()
void | HashEndianCorrectedBlock (const word32 *data)
virtual void | HashEndianCorrectedBlock (const HashWordType *data)=0
void | Init ()
| IteratedHash ()
void | SetBlockSize (unsigned int blockSize)
void | SetStateSize (unsigned int stateSize)
word32 | GetBitCountHi () const
word32 | GetBitCountLo () const
void | PadLastBlock (unsigned int lastBlockSize, byte padFirst=0x80)
virtual unsigned int | HashMultipleBlocks (const word32 *input, unsigned int length)
void | HashBlock (const HashWordType *input)
void | ThrowIfInvalidTruncatedSize (unsigned int size) const
## Protected Attributes
SecBlock< word32 > | m_data
SecBlock< word32 > | m_digest

## 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 532 of file cryptlib.h. Referenced by PSSR_MEM_Base::ComputeMessageRepresentative(), PKCS1v15_SignatureMessageEncodingMethod::ComputeMessageRepresentative(), EMSA5Pad< T >::ComputeMessageRepresentative(), PKCS5_PBKDF2_HMAC< T >::DeriveKey(), DefaultEncryptor::FirstPut(), PSSR_MEM_Base::RecoverMessageFromRepresentative(), HMAC_Base::TruncatedFinal(), ZlibCompressor::WritePoststreamTail(), and Gzip::WritePoststreamTail().

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 558 of file cryptlib.h. Referenced by HashVerificationFilter::LastPut(), Gunzip::ProcessPoststreamTail(), and PSSR_MEM_Base::RecoverMessageFromRepresentative().

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

- sha.h
- sha.cpp