Package com.trilead.ssh2.crypto.cipher
Class DES
- java.lang.Object
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- com.trilead.ssh2.crypto.cipher.DES
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- All Implemented Interfaces:
BlockCipher
- Direct Known Subclasses:
DESede
public class DES extends java.lang.Object implements BlockCipher
DES.
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Constructor Summary
Constructors Constructor Description DES()
standard constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff)
the DES engine.protected int[]
generateWorkingKey(boolean encrypting, byte[] key, int off)
generate an integer based working key based on our secret key and what we processing we are planning to do.java.lang.String
getAlgorithmName()
int
getBlockSize()
void
init(boolean encrypting, byte[] key)
initialise a DES cipher.void
reset()
void
transformBlock(byte[] in, int inOff, byte[] out, int outOff)
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Method Detail
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init
public void init(boolean encrypting, byte[] key)
initialise a DES cipher.- Specified by:
init
in interfaceBlockCipher
- Parameters:
encrypting
- whether or not we are for encryption.key
- the parameters required to set up the cipher.- Throws:
java.lang.IllegalArgumentException
- if the params argument is inappropriate.
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getAlgorithmName
public java.lang.String getAlgorithmName()
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getBlockSize
public int getBlockSize()
- Specified by:
getBlockSize
in interfaceBlockCipher
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transformBlock
public void transformBlock(byte[] in, int inOff, byte[] out, int outOff)
- Specified by:
transformBlock
in interfaceBlockCipher
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reset
public void reset()
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generateWorkingKey
protected int[] generateWorkingKey(boolean encrypting, byte[] key, int off)
generate an integer based working key based on our secret key and what we processing we are planning to do. Acknowledgements for this routine go to James Gillogly & Phil Karn. (whoever, and wherever they are!).
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desFunc
protected void desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff)
the DES engine.
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