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Bouncy Castle Cryptography 1.11 API Specification: Class RC564Engine
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Bouncy Castle Cryptography 1.11
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org.bouncycastle.crypto.engines
Class RC564Engine

java.lang.Object
  |
  +--org.bouncycastle.crypto.engines.RC564Engine
All Implemented Interfaces:
BlockCipher
public class RC564Engine
extends java.lang.Object
implements BlockCipher

The specification for RC5 came from the RC5 Encryption Algorithm publication in RSA CryptoBytes, Spring of 1995. http://www.rsasecurity.com/rsalabs/cryptobytes.

This implementation is set to work with a 64 bit word size.

Implementation courtesy of Tito Pena.

Constructor Summary
RC564Engine()
          Create an instance of the RC5 encryption algorithm and set some defaults
 
Method Summary
 java.lang.String getAlgorithmName()
          Return the name of the algorithm the cipher implements.
 int getBlockSize()
          Return the block size for this cipher (in bytes).
 void init(boolean forEncryption, CipherParameters params)
          initialise a RC5-64 cipher.
 int processBlock(byte[] in, int inOff, byte[] out, int outOff)
          Process one block of input from the array in and write it to the out array.
 void reset()
          Reset the cipher.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RC564Engine

public RC564Engine()
Create an instance of the RC5 encryption algorithm and set some defaults
Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()
Description copied from interface: BlockCipher
Return the name of the algorithm the cipher implements.
Specified by:
getAlgorithmName in interface BlockCipher
Following copied from interface: org.bouncycastle.crypto.BlockCipher
Returns:
the name of the algorithm the cipher implements.

getBlockSize

public int getBlockSize()
Description copied from interface: BlockCipher
Return the block size for this cipher (in bytes).
Specified by:
getBlockSize in interface BlockCipher
Following copied from interface: org.bouncycastle.crypto.BlockCipher
Returns:
the block size for this cipher in bytes.

init

public void init(boolean forEncryption,
                 CipherParameters params)
initialise a RC5-64 cipher.
Specified by:
init in interface BlockCipher
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.

processBlock

public int processBlock(byte[] in,
                        int inOff,
                        byte[] out,
                        int outOff)
Description copied from interface: BlockCipher
Process one block of input from the array in and write it to the out array.
Specified by:
processBlock in interface BlockCipher
Following copied from interface: org.bouncycastle.crypto.BlockCipher
Parameters:
in - the array containing the input data.
inOff - offset into the in array the data starts at.
out - the array the output data will be copied into.
outOff - the offset into the out array the output will start at.
Returns:
the number of bytes processed and produced.
Throws:
DataLengthException - if there isn't enough data in in, or space in out.
java.lang.IllegalStateException - if the cipher isn't initialised.

reset

public void reset()
Description copied from interface: BlockCipher
Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).
Specified by:
reset in interface BlockCipher
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