Package org.bouncycastle.crypto.engines
Class RC564Engine
- java.lang.Object
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- org.bouncycastle.crypto.engines.RC564Engine
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- All Implemented Interfaces:
BlockCipher
public class RC564Engine extends java.lang.Object implements BlockCipher
The specification for RC5 came from theRC5 Encryption Algorithm
publication in RSA CryptoBytes, Spring of 1995. https://www.rsasecurity.com/rsalabs/cryptobytes.This implementation is set to work with a 64 bit word size.
Implementation courtesy of Tito Pena.
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Constructor Summary
Constructors Constructor Description RC564Engine()
Create an instance of the RC5 encryption algorithm and set some defaults
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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.
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Method Detail
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getAlgorithmName
public java.lang.String getAlgorithmName()
Description copied from interface:BlockCipher
Return the name of the algorithm the cipher implements.- Specified by:
getAlgorithmName
in interfaceBlockCipher
- Returns:
- the name of the algorithm the cipher implements.
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getBlockSize
public int getBlockSize()
Description copied from interface:BlockCipher
Return the block size for this cipher (in bytes).- Specified by:
getBlockSize
in interfaceBlockCipher
- Returns:
- the block size for this cipher in bytes.
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init
public void init(boolean forEncryption, CipherParameters params)
initialise a RC5-64 cipher.- Specified by:
init
in interfaceBlockCipher
- 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.
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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 interfaceBlockCipher
- 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.
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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 interfaceBlockCipher
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