SHA224 Class Reference

implements the SHA-224 standard More...

Inheritance diagram for SHA224:
IteratedHashWithStaticTransform< word32, BigEndian, 64, 32, SHA224, 28, true > ClonableImpl< SHA224, AlgorithmImpl< IteratedHash< word32, BigEndian, T_BlockSize >, SHA224 > > AlgorithmImpl< IteratedHash< word32, BigEndian, T_BlockSize >, SHA224 > IteratedHash< word32, BigEndian, T_BlockSize > IteratedHashBase< word32, HashTransformation > HashTransformation Algorithm Clonable

List of all members.

Public Types

typedef BigEndian ByteOrderClass
typedef word32 HashWordType

Public Member Functions

unsigned int DigestSize () const
 Provides the digest size of the hash.
ClonableClone () const
 Copies this object.
std::string AlgorithmName () const
 Provides the name of this algorithm.
 CRYPTOPP_COMPILE_ASSERT ((T_BlockSize &(T_BlockSize-1))==0)
unsigned int BlockSize () const
 Provides the block size of the compression function.
ByteOrder GetByteOrder () const
unsigned int OptimalBlockSize () const
 Provides the input block size most efficient for this hash.
unsigned int OptimalDataAlignment () const
 Provides input and output data alignment for optimal performance.
void Update (const byte *input, size_t length)
 Updates a hash with additional input.
byte * CreateUpdateSpace (size_t &size)
 Request space which can be written into by the caller.
void Restart ()
 Restart the hash.
void TruncatedFinal (byte *digest, size_t size)
 Computes the hash of the current message.
HashTransformationRef ()
 Provides a reference to this object.
virtual void Final (byte *digest)
 Computes the hash of the current message.
unsigned int TagSize () const
 Provides the tag size of the hash.
virtual void CalculateDigest (byte *digest, const byte *input, size_t length)
 Updates the hash with additional input and computes the hash of the current message.
virtual bool Verify (const byte *digest)
 Verifies the hash of the current message.
virtual bool VerifyDigest (const byte *digest, const byte *input, size_t length)
 Updates the hash with additional input and verifies the hash of the current message.
virtual void CalculateTruncatedDigest (byte *digest, size_t digestSize, const byte *input, size_t length)
 Updates the hash with additional input and computes the hash of the current message.
virtual bool TruncatedVerify (const byte *digest, size_t digestLength)
 Verifies the hash of the current message.
virtual bool VerifyTruncatedDigest (const byte *digest, size_t digestLength, const byte *input, size_t length)
 Updates the hash with additional input and verifies the hash of the current message.

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

Detailed Description

implements the SHA-224 standard

Definition at line 39 of file sha.h.


Member Function Documentation

unsigned int IteratedHashWithStaticTransform< word32 , BigEndian , T_BlockSize, T_StateSize, SHA224 , T_DigestSize, T_StateAligned >::DigestSize (  )  const [inline, virtual, inherited]

Provides the digest size of the hash.

Returns:
the digest size of the hash.

Calls to Final() require a buffer that is equal to (or greater than) DigestSize().

Implements HashTransformation.

Definition at line 85 of file iterhash.h.

Clonable* ClonableImpl< SHA224 , AlgorithmImpl< IteratedHash< word32, BigEndian, T_BlockSize >, SHA224 > >::Clone (  )  const [inline, virtual, inherited]

Reimplemented from Clonable.

Definition at line 29 of file simple.h.

std::string AlgorithmImpl< IteratedHash< word32, BigEndian, T_BlockSize > , SHA224 >::AlgorithmName (  )  const [inline, virtual, inherited]

Reimplemented from Algorithm.

Definition at line 42 of file simple.h.

unsigned int IteratedHash< word32 , BigEndian , T_BlockSize, HashTransformation >::BlockSize (  )  const [inline, virtual, inherited]

Reimplemented from HashTransformation.

Definition at line 64 of file iterhash.h.

unsigned int IteratedHashBase< word32 , HashTransformation >::OptimalBlockSize (  )  const [inline, virtual, inherited]

Reimplemented from HashTransformation.

Definition at line 27 of file iterhash.h.

unsigned int IteratedHashBase< word32 , HashTransformation >::OptimalDataAlignment (  )  const [inline, virtual, inherited]

Reimplemented from HashTransformation.

Definition at line 28 of file iterhash.h.

void IteratedHashBase< word32 , HashTransformation >::Update ( const byte *  input,
size_t  length 
) [virtual, inherited]

Implements HashTransformation.

byte* IteratedHashBase< word32 , HashTransformation >::CreateUpdateSpace ( size_t &  size  )  [virtual, inherited]

Reimplemented from HashTransformation.

void IteratedHashBase< word32 , HashTransformation >::Restart (  )  [virtual, inherited]

Reimplemented from HashTransformation.

void IteratedHashBase< word32 , HashTransformation >::TruncatedFinal ( byte *  digest,
size_t  digestSize 
) [virtual, inherited]

Implements HashTransformation.

Reimplemented in Weak::PanamaHash< B >.

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

Provides a reference to this object.

Returns:
A reference to this object

Useful for passing a temporary object to a function that takes a non-const reference

Definition at line 864 of file cryptlib.h.

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

Computes the hash of the current message.

Parameters:
digest a pointer to the buffer to receive the hash

digest must be equal to (or greater than) DigestSize(). Final() restarts the hash for a new message.

Definition at line 885 of file cryptlib.h.

References DigestSize().

Referenced by PKCS5_PBKDF2_HMAC< T >::DeriveKey(), RandomPool::IncorporateEntropy(), and HMAC_Base::TruncatedFinal().

unsigned int HashTransformation::TagSize (  )  const [inline, inherited]

Provides the tag size of the hash.

Returns:
the tag size of the hash.

Same as DigestSize().

Definition at line 901 of file cryptlib.h.

References DigestSize().

virtual void HashTransformation::CalculateDigest ( byte *  digest,
const byte *  input,
size_t  length 
) [inline, virtual, inherited]

Updates the hash with additional input and computes the hash of the current message.

Parameters:
digest a pointer to the buffer to receive the hash
input the additional input as a buffer
length the size of the buffer, in bytes

Use this if your input is in one piece and you don't want to call Update() and Final() separately

CalculateDigest() restarts the hash for the next nmessage.

Definition at line 927 of file cryptlib.h.

Referenced by PKCS5_PBKDF2_HMAC< T >::DeriveKey(), and HKDF< T >::DeriveKey().

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

Verifies the hash of the current message.

Parameters:
digest a pointer to the buffer of an existing hash
Returns:
true if the existing hash matches the computed hash, false otherwise
Exceptions:
ThrowIfInvalidTruncatedSize() if the existing hash's size exceeds DigestSize()

Calls to Verify() require a buffer that is equal to (or greater than) DigestSize().

Verify() performs a bitwise compare on the buffers using VerifyBufsEqual(), which is a constant time comparison function. digestLength cannot exceed DigestSize().

Verify() restarts the hash for the next nmessage.

Definition at line 938 of file cryptlib.h.

References DigestSize().

virtual bool HashTransformation::VerifyDigest ( const byte *  digest,
const byte *  input,
size_t  length 
) [inline, virtual, inherited]

Updates the hash with additional input and verifies the hash of the current message.

Parameters:
digest a pointer to the buffer of an existing hash
input the additional input as a buffer
length the size of the buffer, in bytes
Returns:
true if the existing hash matches the computed hash, false otherwise
Exceptions:
ThrowIfInvalidTruncatedSize() if the existing hash's size exceeds DigestSize()

Use this if your input is in one piece and you don't want to call Update() and Verify() separately

VerifyDigest() performs a bitwise compare on the buffers using VerifyBufsEqual(), which is a constant time comparison function. digestLength cannot exceed DigestSize().

VerifyDigest() restarts the hash for the next nmessage.

Definition at line 952 of file cryptlib.h.

virtual void HashTransformation::CalculateTruncatedDigest ( byte *  digest,
size_t  digestSize,
const byte *  input,
size_t  length 
) [inline, virtual, inherited]

Updates the hash with additional input and computes the hash of the current message.

Parameters:
digest a pointer to the buffer to receive the hash
digestSize the length of the truncated hash, in bytes
input the additional input as a buffer
length the size of the buffer, in bytes

Use this if your input is in one piece and you don't want to call Update() and CalculateDigest() separately.

CalculateTruncatedDigest() restarts the hash for the next nmessage.

Definition at line 970 of file cryptlib.h.

bool HashTransformation::TruncatedVerify ( const byte *  digest,
size_t  digestLength 
) [virtual, inherited]

Verifies the hash of the current message.

Parameters:
digest a pointer to the buffer of an existing hash
digestLength the size of the truncated hash, in bytes
Returns:
true if the existing hash matches the computed hash, false otherwise
Exceptions:
ThrowIfInvalidTruncatedSize() if digestLength exceeds DigestSize()

TruncatedVerify() is a truncated version of Verify(). It can operate on a buffer smaller than DigestSize(). However, digestLength cannot exceed DigestSize().

Verify() performs a bitwise compare on the buffers using VerifyBufsEqual(), which is a constant time comparison function. digestLength cannot exceed DigestSize().

TruncatedVerify() restarts the hash for the next nmessage.

Reimplemented in NullHash, and TruncatedHashTemplate< T >.

Definition at line 411 of file cryptlib.cpp.

References HashTransformation::TruncatedFinal().

Referenced by AuthenticatedSymmetricCipher::DecryptAndVerify().

virtual bool HashTransformation::VerifyTruncatedDigest ( const byte *  digest,
size_t  digestLength,
const byte *  input,
size_t  length 
) [inline, virtual, inherited]

Updates the hash with additional input and verifies the hash of the current message.

Parameters:
digest a pointer to the buffer of an existing hash
digestLength the size of the truncated hash, in bytes
input the additional input as a buffer
length the size of the buffer, in bytes
Returns:
true if the existing hash matches the computed hash, false otherwise
Exceptions:
ThrowIfInvalidTruncatedSize() if digestLength exceeds DigestSize()

Use this if your input is in one piece and you don't want to call Update() and TruncatedVerify() separately.

VerifyTruncatedDigest() is a truncated version of VerifyDigest(). It can operate on a buffer smaller than DigestSize(). However, digestLength cannot exceed DigestSize().

VerifyTruncatedDigest() restarts the hash for the next nmessage.

Definition at line 997 of file cryptlib.h.


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

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