SHA224 Class Reference

#include <sha.h>

Inheritance diagram for SHA224:

IteratedHashWithStaticTransform< T_HashWordType, T_Endianness, T_BlockSize, T_StateSize, T_Transform, T_DigestSize > ClonableImpl< T_Transform, AlgorithmImpl< IteratedHash< T_HashWordType, T_Endianness, T_BlockSize >, T_Transform > > AlgorithmImpl< IteratedHash< T_HashWordType, T_Endianness, T_BlockSize >, T_Transform > IteratedHash< T_HashWordType, T_Endianness, T_BlockSize > IteratedHashBase< T_HashWordType, HashTransformation > HashTransformation Algorithm Clonable List of all members.

Detailed Description

implements the SHA-224 standard

Definition at line 32 of file sha.h.

Public Types

typedef T_Endianness ByteOrderClass
typedef T_HashWordType HashWordType

Public Member Functions

unsigned int DigestSize () const
 size of the hash returned by Final()
ClonableClone () 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
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, size_t length)
 process more input
byte * CreateUpdateSpace (size_t &size)
 request space to write input into
void Restart ()
 discard the current state, and restart with a new message
void TruncatedFinal (byte *digest, size_t size)
 truncated version of Final()
HashTransformationRef ()
 return a reference to this object,
virtual void Final (byte *digest)
 compute hash for current message, then restart for a new message
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
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 __cdecl InitState (HashWordType *state)
static void __cdecl Transform (word32 *digest, const word32 *data)
static const char *__cdecl StaticAlgorithmName ()
static void CorrectEndianess (HashWordType *out, const HashWordType *in, size_t byteCount)

Static Public Attributes

static const int DIGESTSIZE = T_DigestSize ? T_DigestSize : T_StateSize
static const int BLOCKSIZE
static CompileAssert<((T_BlockSize
&(T_BlockSize-1))==0)> 
cryptopp_assert___LINE__

Protected Member Functions

void HashEndianCorrectedBlock (const T_HashWordType *data)
void Init ()
void SetBlockSize (unsigned int blockSize)
void SetStateSize (unsigned int stateSize)
T_HashWordType GetBitCountHi () const
T_HashWordType GetBitCountLo () const
void PadLastBlock (unsigned int lastBlockSize, byte padFirst=0x80)
virtual size_t HashMultipleBlocks (const T_HashWordType *input, size_t length)
void HashBlock (const HashWordType *input)
void ThrowIfInvalidTruncatedSize (size_t size) const

Protected Attributes

SecBlock< T_HashWordType > m_data
SecBlock< T_HashWordType > m_digest


Member Function Documentation

HashTransformation& HashTransformation::Ref (  )  [inline, inherited]

return a reference to this object,

This function is useful for passing a temporary HashTransformation object to a function that takes a non-const reference.

Definition at line 529 of file cryptlib.h.

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 539 of file cryptlib.h.

Referenced by PSSR_MEM_Base::ComputeMessageRepresentative(), PKCS1v15_SignatureMessageEncodingMethod::ComputeMessageRepresentative(), EMSA5Pad< T >::ComputeMessageRepresentative(), 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 565 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:
Generated on Sat Dec 23 02:07:33 2006 for Crypto++ by  doxygen 1.5.1-p1