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CHMAC Class Reference

class CHMAC : public CMessageDigest

An HMAC (Hashed Message Authentication Code)

Inherits from

Public Member Functions
~CHMAC (void)
IMPORT_C TInt BlockSize (void)
IMPORT_C CMessageDigest * CopyL (void)
IMPORT_C TPtrC8 Final (const TDesC8 &)
IMPORT_C TPtrC8 Final ()
IMPORT_C TPtrC8 Hash (const TDesC8 &)
IMPORT_C TInt HashSize (void)
IMPORT_C CHMAC * NewL (const TDesC8 &, CMessageDigest *)
IMPORT_C CMessageDigest * ReplicateL (void)
IMPORT_C void Reset (void)
void RestoreState ()
void StoreState ()
IMPORT_C void Update (const TDesC8 &)
Protected Member Functions
CHMAC (void)
CHMAC ( CMessageDigest *)
CHMAC (const CHMAC &)
void InitialiseL (const TDesC8 &)
Private Member Functions
void InitBlockSizeL ()
Inherited Functions
CBase::CBase()
CBase::Delete(CBase *)
CBase::Extension_(TUint,TAny *&,TAny *)
CBase::operator new(TUint)
CBase::operator new(TUint,TAny *)
CBase::operator new(TUint,TLeave)
CBase::operator new(TUint,TLeave,TUint)
CBase::operator new(TUint,TUint)
CBase::~CBase()
CMessageDigest::CMessageDigest(const CMessageDigest &)
CMessageDigest::CMessageDigest(void)
CMessageDigest::GetExtension(TUint,TAny *&,TAny *)
CMessageDigest::~CMessageDigest(void)
Inherited Enumerations
CMessageDigest:THashId
Private Attributes
TInt iBlockSize
CMessageDigest * iDigest
TBuf8 < KMaxBlockSize > iInnerPad
TBuf8 < KMaxBlockSize > iInnerPadCopy
TBuf8 < KMaxBlockSize > iOuterPad
TBuf8 < KMaxBlockSize > iOuterPadCopy

Constructor & Destructor Documentation

CHMAC(void)

CHMAC ( void ) [protected]

Parameters

void

CHMAC(CMessageDigest *)

CHMAC ( CMessageDigest * aDigest ) [protected]

Parameters

CMessageDigest * aDigest

CHMAC(const CHMAC &)

CHMAC ( const CHMAC & aHMAC ) [protected]

Parameters

const CHMAC & aHMAC

~CHMAC(void)

IMPORT_C ~CHMAC ( void )

Destructor

Parameters

void

Member Functions Documentation

BlockSize(void)

IMPORT_C TInt BlockSize ( void ) [virtual]

Gets the internal block size of the message digest.

Parameters

void

CopyL(void)

IMPORT_C CMessageDigest * CopyL ( void ) [virtual]

Creates a new CMessageDigest object with the exact same state as the current object.

This function copies all internal state of the message digest. To create a new CMessageDigest object without the state of the current object, see ReplicateL() .

Parameters

void

Final(const TDesC8 &)

IMPORT_C TPtrC8 Final ( const TDesC8 & aMessage ) [virtual]

Adds aMessage to the internal representation of data to be hashed, returns a TPtrC8 of the finalised hash of all the previously appended messages, and calls Reset() .

Since
v8.0

Parameters

const TDesC8 & aMessage Data to be included in the hash

Final()

IMPORT_C TPtrC8 Final ( ) [virtual]

Gets a TPtrC8 of the finalised hash of all the previously appended messages and then calls Reset() .

Since
v8.0

Hash(const TDesC8 &)

IMPORT_C TPtrC8 Hash ( const TDesC8 & aMessage ) [virtual]

Adds aMessage to the internal representation of data to be hashed, then returns a TPtrC8 of the finalised hash of all the previously appended messages.

Parameters

const TDesC8 & aMessage Data to be included in the hash.

HashSize(void)

IMPORT_C TInt HashSize ( void ) [virtual]

Gets the size of the message digest output.

Parameters

void

InitBlockSizeL()

void InitBlockSizeL ( ) [private]

InitialiseL(const TDesC8 &)

void InitialiseL ( const TDesC8 & aKey ) [protected]

Parameters

const TDesC8 & aKey

NewL(const TDesC8 &, CMessageDigest *)

IMPORT_C CHMAC * NewL ( const TDesC8 & aKey,
CMessageDigest * aDigest
) [static]

Creates a new HMAC object from a specified type of message digest and authentication key.

Parameters

const TDesC8 & aKey Authentication key.
CMessageDigest * aDigest A message digest to construct the HMAC from.

ReplicateL(void)

IMPORT_C CMessageDigest * ReplicateL ( void ) [virtual]

Creates a brand new reset CMessageDigest object containing no state information from the current object.

To make a copy of a message digest with its internal state intact, see CopyL() .

Parameters

void

Reset(void)

IMPORT_C void Reset ( void ) [virtual]

Resets the internal state of the message digest.

A reset hash object loses all internal state representing the hashed data. A reset message digest is suitable to begin a new, distinct hash of different data. Any previously returned TPtrC8 from a call to Final() remains valid until any subsequent call to Update() or Final() .

Parameters

void

RestoreState()

void RestoreState ( ) [virtual]

Restores the internal state of the message digest to a previously stored state.

StoreState()

StoreState()

void StoreState ( ) [virtual]

Stores the internal state of the message digest.

Update(const TDesC8 &)

IMPORT_C void Update ( const TDesC8 & aMessage ) [virtual]

Adds data to the internal representation of messages to be hashed.

Since
v8.0

Parameters

const TDesC8 & aMessage Data to be included in the hash.

Member Data Documentation

TInt iBlockSize

TInt iBlockSize [private]

CMessageDigest * iDigest

CMessageDigest * iDigest [private]

TBuf8< KMaxBlockSize > iInnerPad

TBuf8 < KMaxBlockSize > iInnerPad [private]

TBuf8< KMaxBlockSize > iInnerPadCopy

TBuf8 < KMaxBlockSize > iInnerPadCopy [private]

TBuf8< KMaxBlockSize > iOuterPad

TBuf8 < KMaxBlockSize > iOuterPad [private]

TBuf8< KMaxBlockSize > iOuterPadCopy

TBuf8 < KMaxBlockSize > iOuterPadCopy [private]

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