net.ninthtest.crypto.helix

Interface HelixPrimitive

All Known Implementing Classes:

HelixDecryption, HelixEncryption

public interface HelixPrimitive

A cryptographic primitive for the Helix combined stream cipher and MAC function.

Version:

1.0

Author:

Matthew Zipay (mattz@ninthtest.net)

See Also:

Helix: Fast Encryption and Authentication in a Single Cryptographic Primitive

Method Summary

Modifier and Type	Method and Description
int	bufferSize() Returns the number of bytes that are currently buffered.
byte[]	feed(byte[] part) Processes the next sequence of input bytes.
byte[]	finish(byte[] part) Completes a Helix encryption/decryption operation.
byte[]	getGeneratedMac() Returns the MAC that was generated following a successful encryption/decryption operation.

Method Detail

feed

byte[] feed(byte[] part)

Processes the next sequence of input bytes.

Parameters:

part - the next sequence of bytes to be processed by this primitive

Returns:

an array of bytes representing plaintext or ciphertext, depending on the operation mode of this primitive

bufferSize

int bufferSize()

Returns the number of bytes that are currently buffered.

Returns:

the buffered byte count

finish

byte[] finish(byte[] part)

Completes a Helix encryption/decryption operation.

If this method completes successfully, the generated MAC can be retrieved using the getGeneratedMac() method.

Parameters:

part - the last input bytes to be fed

Returns:

the ciphertext (encryption) or plaintext (decryption) bytes

getGeneratedMac

byte[] getGeneratedMac()

Returns the MAC that was generated following a successful encryption/decryption operation.

Returns:

the generated MAC bytes