| java.lang.Object
 net.sourceforge.jtds.util.DESEngine
| DESEngine | | public class DESEngine (Code) | | a class that provides a basic DES engine.
Modified by Matt Brinkley (mdb) ... mainly just removed depends on external classes.
version:
$Id: DESEngine.java,v 1.3 2004/09/16 20:40:51 matt_brinkley Exp $ |
| Field Summary | |
| final protected static int | BLOCK_SIZE
| | static short[] | Df_Key
what follows is mainly taken from "Applied Cryptography", by
Bruce Schneier, however it also bears great resemblance to Richard
Outerbridge's D3DES... | | static int[] | SP1
| | static int[] | SP2
| | static int[] | SP3
| | static int[] | SP4
| | static int[] | SP5
| | static int[] | SP6
| | static int[] | SP7
| | static int[] | SP8
| | static int[] | bigbyte
| | static short[] | bytebit
| | static byte[] | pc1
| | static byte[] | pc2
| | static byte[] | totrot
|
| Constructor Summary | |
| public | DESEngine()
standard constructor. | | public | DESEngine(boolean encrypting, byte[] key)
|
| Method Summary | |
| protected void | desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff)
the DES engine. | | protected int[] | generateWorkingKey(boolean encrypting, byte[] key)
generate an integer based working key based on our secret key
and what we processing we are planning to do. | | public String | getAlgorithmName()
| | public int | getBlockSize()
| | public void | init(boolean encrypting, byte[] key)
initialise a DES cipher. | | public int | processBlock(byte[] in, int inOff, byte[] out, int outOff)
| | public void | reset()
|
| BLOCK_SIZE | | final protected static int BLOCK_SIZE(Code) | | |
| Df_Key | | static short[] Df_Key(Code) | | what follows is mainly taken from "Applied Cryptography", by
Bruce Schneier, however it also bears great resemblance to Richard
Outerbridge's D3DES...
|
| bigbyte | | static int[] bigbyte(Code) | | |
| bytebit | | static short[] bytebit(Code) | | |
| totrot | | static byte[] totrot(Code) | | |
| DESEngine | | public DESEngine()(Code) | | standard constructor.
|
| DESEngine | | public DESEngine(boolean encrypting, byte[] key)(Code) | | mdb: convenient constructor
|
| desFunc | | protected void desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff)(Code) | | the DES engine.
|
| generateWorkingKey | | protected int[] generateWorkingKey(boolean encrypting, byte[] key)(Code) | | 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!).
|
| getBlockSize | | public int getBlockSize()(Code) | | |
| init | | public void init(boolean encrypting, byte[] key)(Code) | | initialise a DES cipher.
Parameters:
encrypting - whether or not we are for encryption.
Parameters:
key - the parameters required to set up the cipher.
exception:
IllegalArgumentException - if the params argument isinappropriate. |
| processBlock | | public int processBlock(byte[] in, int inOff, byte[] out, int outOff)(Code) | | |
| reset | | public void reset()(Code) | | |
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