org.bouncycastle.crypto.engines
Class VMPCEngine

java.lang.Object
  org.bouncycastle.crypto.engines.VMPCEngine

All Implemented Interfaces:

StreamCipher

Direct Known Subclasses:

VMPCKSA3Engine

public class VMPCEngine

extends java.lang.Object

implements StreamCipher

Field Summary

protected byte	n
protected byte[]	P
protected byte	s
protected byte[]	workingIV
protected byte[]	workingKey

Constructor Summary

VMPCEngine()

Method Summary

java.lang.String	getAlgorithmName() Return the name of the algorithm the cipher implements.
void	init(boolean forEncryption, CipherParameters params) initialise a VMPC cipher.
protected void	initKey(byte[] keyBytes, byte[] ivBytes)
int	processBytes(byte[] in, int inOff, int len, byte[] out, int outOff) process a block of bytes from in putting the result into out.
void	reset() reset the cipher.
byte	returnByte(byte in) encrypt/decrypt a single byte returning the result.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

n

protected byte n

P

protected byte[] P

s

protected byte s

workingIV

protected byte[] workingIV

workingKey

protected byte[] workingKey

Constructor Detail

VMPCEngine

public VMPCEngine()

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: StreamCipher

Return the name of the algorithm the cipher implements.

Specified by:

getAlgorithmName in interface StreamCipher

Returns:

the name of the algorithm the cipher implements.

init

public void init(boolean forEncryption,
                 CipherParameters params)

initialise a VMPC cipher.

Specified by:

init in interface StreamCipher

Parameters:

forEncryption - whether or not we are for encryption.

params - the parameters required to set up the cipher.

Throws:

java.lang.IllegalArgumentException - if the params argument is inappropriate.

initKey

protected void initKey(byte[] keyBytes,
                       byte[] ivBytes)

processBytes

public int processBytes(byte[] in,
                        int inOff,
                        int len,
                        byte[] out,
                        int outOff)

Description copied from interface: StreamCipher

process a block of bytes from in putting the result into out.

Specified by:

processBytes in interface StreamCipher

Parameters:

in - the input byte array.

inOff - the offset into the in array where the data to be processed starts.

len - the number of bytes to be processed.

out - the output buffer the processed bytes go into.

outOff - the offset into the output byte array the processed data starts at.

Returns:

the number of bytes produced - should always be len.

reset

public void reset()

Description copied from interface: StreamCipher

reset the cipher. This leaves it in the same state it was at after the last init (if there was one).

Specified by:

reset in interface StreamCipher

returnByte

public byte returnByte(byte in)

Description copied from interface: StreamCipher

encrypt/decrypt a single byte returning the result.

Specified by:

returnByte in interface StreamCipher

Parameters:

in - the byte to be processed.

Returns:

the result of processing the input byte.