org.bouncycastle.crypto.engines
Class IDEAEngine
java.lang.Object
org.bouncycastle.crypto.engines.IDEAEngine
- BlockCipher
public class IDEAEngine
extends java.lang.Object
A class that provides a basic International Data Encryption Algorithm (IDEA) engine.
This implementation is based on the "HOWTO: INTERNATIONAL DATA ENCRYPTION ALGORITHM"
implementation summary by Fauzan Mirza (F.U.Mirza@sheffield.ac.uk). (baring 1 typo at the
end of the mulinv function!).
It can be found at ftp://ftp.funet.fi/pub/crypt/cryptography/symmetric/idea/
Note: This algorithm is patented in the USA, Japan, and Europe including
at least Austria, France, Germany, Italy, Netherlands, Spain, Sweden, Switzerland
and the United Kingdom. Non-commercial use is free, however any commercial
products are liable for royalties. Please see
www.mediacrypt.com for
further details. This announcement has been included at the request of
the patent holders.
String | getAlgorithmName() - Return the name of the algorithm the cipher implements.
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int | getBlockSize() - Return the block size for this cipher (in bytes).
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void | init(boolean forEncryption, CipherParameters params) - initialise an IDEA cipher.
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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.
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void | reset() - Reset the cipher.
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BLOCK_SIZE
protected static final int BLOCK_SIZE
IDEAEngine
public IDEAEngine()
standard constructor.
getAlgorithmName
public String getAlgorithmName()
Return the name of the algorithm the cipher implements.
- getAlgorithmName in interface BlockCipher
- the name of the algorithm the cipher implements.
getBlockSize
public int getBlockSize()
Return the block size for this cipher (in bytes).
- getBlockSize in interface BlockCipher
- the block size for this cipher in bytes.
init
public void init(boolean forEncryption,
CipherParameters params)
initialise an IDEA cipher.
- init in interface BlockCipher
forEncryption
- whether or not we are for encryption.params
- the parameters required to set up the cipher.
processBlock
public 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.
- processBlock in interface BlockCipher
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.
- the number of bytes processed and produced.
reset
public void reset()
Reset the cipher. After resetting the cipher is in the same state
as it was after the last init (if there was one).
- reset in interface BlockCipher