IDEAEngine (Bouncy Castle Library 1.60 API Specification)

java.lang.Object
- org.bouncycastle.crypto.engines.IDEAEngine

All Implemented Interfaces:

BlockCipher
```
public class IDEAEngine
extends java.lang.Object
implements BlockCipher
```
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). (barring 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 was patented in the USA, Japan and Europe. These patents expired in 2011/2012.

Field Summary

Fields
Modifier and Type Field Description

protected static int BLOCK_SIZE

Fields
Modifier and Type	Field	Description
`protected static int`	`BLOCK_SIZE`

Constructor Summary

Constructors
Constructor Description

IDEAEngine()
standard constructor.

Constructors
Constructor	Description
`IDEAEngine()`	standard constructor.

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 an IDEA 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

- Field Detail
  - BLOCK_SIZE
```
protected static final int BLOCK_SIZE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - IDEAEngine
```
public IDEAEngine()
```
    standard constructor.
- Method Detail
  - init
```
public void init(boolean forEncryption,
                 CipherParameters params)
```
    initialise an IDEA 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.
  - 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
    
    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
    
    Returns:
    
    the block size for this cipher in bytes.
  - 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
    
    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.
  - 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

Class IDEAEngine

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BLOCK_SIZE

Constructor Detail

IDEAEngine

Method Detail

init

getAlgorithmName

getBlockSize

processBlock

reset