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gnu.crypto.cipher
Class Blowfish

java.lang.Object
  extended by gnu.crypto.cipher.BaseCipher
      extended by gnu.crypto.cipher.Blowfish
All Implemented Interfaces:
IBlockCipher, IBlockCipherSpi, Cloneable

public class Blowfish
extends BaseCipher

Blowfish is a 16-round, 64-bit Feistel cipher designed by Bruce Schneier. It accepts a variable-length key of up to 448 bits.

References:

  1. Schneier, Bruce: Applied Cryptography, Second Edition, 336--339, 647--654 (1996 Bruce Schneier).
  2. The Blowfish Encryption Algorithm.


Field Summary
(package private) static int[] KS0
          Initial value of S-box 1.
 
Fields inherited from class gnu.crypto.cipher.BaseCipher
currentBlockSize, currentKey, defaultBlockSize, defaultKeySize, lock, name
 
Fields inherited from interface gnu.crypto.cipher.IBlockCipher
CIPHER_BLOCK_SIZE, KEY_MATERIAL
 
Constructor Summary
Blowfish()
           
 
Method Summary
 Iterator blockSizes()
          Returns an Iterator over the supported block sizes.
 Object clone()
          Returns a clone of this instance.
 void decrypt(byte[] in, int i, byte[] out, int o, Object k, int bs)
           
 void encrypt(byte[] in, int i, byte[] out, int o, Object k, int bs)
           
 Iterator keySizes()
          Returns an Iterator over the supported key sizes.
 Object makeKey(byte[] k, int bs)
           
 boolean selfTest()
          A correctness test that consists of basic symmetric encryption / decryption test(s) for all supported block and key sizes, as well as one (1) variable key Known Answer Test (KAT).
 
Methods inherited from class gnu.crypto.cipher.BaseCipher
currentBlockSize, decryptBlock, defaultBlockSize, defaultKeySize, encryptBlock, init, name, reset, testKat, testKat
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

KS0

static final int[] KS0
Initial value of S-box 1.

Constructor Detail

Blowfish

public Blowfish()
Method Detail

clone

public Object clone()
Description copied from interface: IBlockCipher

Returns a clone of this instance.

Specified by:
clone in interface IBlockCipher
Specified by:
clone in class BaseCipher
Returns:
a clone copy of this instance.

keySizes

public Iterator keySizes()
Description copied from interface: IBlockCipher

Returns an Iterator over the supported key sizes. Each element returned by this object is an Integer.

Returns:
an Iterator over the supported key sizes.

blockSizes

public Iterator blockSizes()
Description copied from interface: IBlockCipher

Returns an Iterator over the supported block sizes. Each element returned by this object is an Integer.

Returns:
an Iterator over the supported block sizes.

makeKey

public Object makeKey(byte[] k,
                      int bs)

encrypt

public void encrypt(byte[] in,
                    int i,
                    byte[] out,
                    int o,
                    Object k,
                    int bs)

decrypt

public void decrypt(byte[] in,
                    int i,
                    byte[] out,
                    int o,
                    Object k,
                    int bs)

selfTest

public boolean selfTest()
Description copied from interface: IBlockCipher

A correctness test that consists of basic symmetric encryption / decryption test(s) for all supported block and key sizes, as well as one (1) variable key Known Answer Test (KAT).

Specified by:
selfTest in interface IBlockCipher
Specified by:
selfTest in interface IBlockCipherSpi
Overrides:
selfTest in class BaseCipher
Returns:
true if the implementation passes simple correctness tests. Returns false otherwise.

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