PTEACypher Class Reference

Tiny Encryption Algorithm. More...

#include <cypher.h>

Inheritance diagram for PTEACypher:

List of all members.

Public Member Functions
	PTEACypher (BlockChainMode chainMode=ElectronicCodebook)
	Create a new TEA encryption object instance.
	PTEACypher (const Key &keyData, BlockChainMode chainMode=ElectronicCodebook)
void	SetKey (const Key &newKey)
	Set the key used by this encryption method.
void	GetKey (Key &newKey) const
	Get the key used by this encryption method.
Static Public Member Functions
static void	GenerateKey (Key &newKey)
	Generate a new key suitable for use for encryption using random data.
Protected Member Functions
virtual void	Initialise (PBoolean encoding)
	Initialise the encoding/decoding sequence.
virtual void	EncodeBlock (const void *in, void *out)
	Encode an n bit block of memory according to the encryption algorithm.
virtual void	DecodeBlock (const void *in, void *out)
	Decode an n bit block of memory according to the encryption algorithm.
Classes
struct	Key

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Detailed Description

Tiny Encryption Algorithm.

This class implements the Tiny Encryption Algorithm by David Wheeler and Roger Needham at Cambridge University.

This is a simple algorithm using a 128 bit binary key and encrypts data in 64 bit blocks.

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Constructor & Destructor Documentation

PTEACypher::PTEACypher

(

BlockChainMode

chainMode = ElectronicCodebook

)

Create a new TEA encryption object instance.

The parameterless version automatically generates a new, random, key.

Parameters:

chainMode

Block chain mode

PTEACypher::PTEACypher	(	const Key &	keyData,
		BlockChainMode	chainMode = ElectronicCodebook
	)

Parameters:

keyData	Key for the encryption/decryption algorithm.
chainMode	Block chain mode

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Member Function Documentation

virtual void PTEACypher::DecodeBlock	(	const void *	in,
		void *	out
	)			[protected, virtual]

Decode an n bit block of memory according to the encryption algorithm.

Parameters:

in	Pointer to coded n bit block.
out	Pointer to clear n bit block.

Implements PCypher.

virtual void PTEACypher::EncodeBlock	(	const void *	in,
		void *	out
	)			[protected, virtual]

Encode an n bit block of memory according to the encryption algorithm.

Parameters:

in	Pointer to clear n bit block.
out	Pointer to coded n bit block.

Implements PCypher.

static void PTEACypher::GenerateKey

(

Key &

newKey

)

[static]

Generate a new key suitable for use for encryption using random data.

Parameters:

newKey

Variable to take the newly generated key.

void PTEACypher::GetKey

(

Key &

newKey

)

const

Get the key used by this encryption method.

Parameters:

newKey

Variable to take the key used by cypher.

virtual void PTEACypher::Initialise

(

PBoolean

encoding

)

[protected, virtual]

Initialise the encoding/decoding sequence.

Parameters:

encoding

Flag for encoding/decoding sequence about to start.

Implements PCypher.

void PTEACypher::SetKey

(

const Key &

newKey

)

Set the key used by this encryption method.

Parameters:

newKey

Variable to take the key used by cypher.

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

• cypher.h

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