CMD4 Class Reference

#include <hash.h>

Link against: hash.lib

class CMD4 : public CMessageDigest

Inherits from

CMD4
- CMessageDigest

Public Member Functions
	~CMD4(void)
virtual IMPORT_C TInt	BlockSize(void)
virtual IMPORT_C CMessageDigest *	CopyL(void)
virtual IMPORT_C TPtrC8	Final(const TDesC8 &)
virtual IMPORT_C TPtrC8	Final()
virtual IMPORT_C TPtrC8	Hash(const TDesC8 &)
virtual IMPORT_C TInt	HashSize(void)
IMPORT_C CMD4 *	NewL(void)
virtual IMPORT_C CMessageDigest *	ReplicateL(void)
virtual IMPORT_C void	Reset(void)
virtual void	RestoreState()
virtual void	StoreState()
virtual IMPORT_C void	Update(const TDesC8 &)

Protected Member Functions
	CMD4(void)

Inherited Enumerations
	CMessageDigest:THashId

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)

Detailed Description

An MD4 message digest Algorithm. Takes a message of arbitrary length as input and produces a 128-bit message digest.

The total input length of data should not be longer than 2^32 in bits(2^31 in bytes) which is roughly half a gig.

Constructor & Destructor Documentation

CMD4 ( void )

CMD4

(

void

)

[protected]

~CMD4 ( void )

IMPORT_C

~CMD4

(

void

)

Destructor

Member Function Documentation

BlockSize ( void )

IMPORT_C TInt

BlockSize

(

void

)

[virtual]

Reimplemented from CMessageDigest::BlockSize(void)

Gets the internal block size of the message digest.

Returns: Internal block size of message digest in bytes.

CopyL ( void )

IMPORT_C CMessageDigest *

CopyL

(

void

)

[virtual]

Reimplemented from CMessageDigest::CopyL(void)

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().

Returns: A pointer to the new CMessageDigest object

Final ( const TDesC8 & )

IMPORT_C TPtrC8

Final

(

const TDesC8 &

aMessage

)

[virtual]

Reimplemented from CMessageDigest::Final(const TDesC8 &)

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

Parameter	Description
aMessage	Data to be included in the hash

Returns: A descriptor pointer to the buffer containing the resulting hash.

Final ( )

IMPORT_C TPtrC8

Final

(

)

[virtual]

Reimplemented from CMessageDigest::Final(void)

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

Since: v8.0

Returns: A descriptor pointer to the buffer containing the resulting hash.

Hash ( const TDesC8 & )

IMPORT_C TPtrC8

Hash

(

const TDesC8 &

aMessage

)

[virtual]

Reimplemented from CMessageDigest::Hash(const TDesC8 &)

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.

Parameter	Description
aMessage	Data to be included in the hash.

Returns: A descriptor pointer to the buffer containing the resulting hash.

HashSize ( void )

IMPORT_C TInt

HashSize

(

void

)

[virtual]

Reimplemented from CMessageDigest::HashSize(void)

Gets the size of the message digest output.

Returns: Output size of the message digest in bytes.

NewL ( void )

IMPORT_C CMD4 *

NewL

(

void

)

[static]

Creates a new MD4 object.

Returns: A pointer to the new CMD4 object

ReplicateL ( void )

IMPORT_C CMessageDigest *

ReplicateL

(

void

)

[virtual]

Reimplemented from CMessageDigest::ReplicateL(void)

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().

Returns: A pointer to the new reset CMessageDigest object

Reset ( void )

IMPORT_C void

Reset

(

void

)

[virtual]

Reimplemented from CMessageDigest::Reset(void)

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().

RestoreState ( )

void

RestoreState

(

)

[virtual]

Reimplemented from CMessageDigest::RestoreState()

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

StoreState ( )

void

StoreState

(

)

[virtual]

Reimplemented from CMessageDigest::StoreState()

Stores the internal state of the message digest.

Update ( const TDesC8 & )

IMPORT_C void

Update

(

const TDesC8 &

aMessage

)

[virtual]

Reimplemented from CMessageDigest::Update(const TDesC8 &)

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

Since: v8.0

Parameter	Description
aMessage	Data to be included in the hash.