org.bouncycastle.crypto.engines

Class VMPCEngine

Implemented Interfaces:
StreamCipher
Known Direct Subclasses:
VMPCKSA3Engine

public class VMPCEngine
extends java.lang.Object
implements StreamCipher

Field Summary

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

Method Summary

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)
void
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.

Field Details

P

protected byte[] P

n

protected byte n

s

protected byte s

workingIV

protected byte[] workingIV

workingKey

protected byte[] workingKey

Method Details

getAlgorithmName

public String getAlgorithmName()
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.

initKey

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

processBytes

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

reset

public void reset()
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)
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.