net.sourceforge.blowfishj
Class BlowfishECB

java.lang.Object
  net.sourceforge.blowfishj.BlowfishECB

Direct Known Subclasses:

BlowfishCBC

public class BlowfishECB

extends java.lang.Object

Implementation of the Blowfish encryption algorithm in ECB mode.

Field Summary

static int	BLOCKSIZE block size of this cipher (in bytes)
static int	MAXKEYLENGTH maximum possible key length in bytes

Constructor Summary

BlowfishECB()
The default constructor, call initialize() afterwards to do the final setup.

BlowfishECB(byte[] key)
Deprecated. use BlowfishECB(byte[], int, int) instead

BlowfishECB(byte[] key, int nOfs, int nLen)

Method Summary

void	cleanUp() To clear data in the boxes before an instance is freed, the actual value of this call can be argued, yet still nice to have it.
void	decrypt(byte[] buf) Deprecated. use decrypt(byte[], int, byte[], int, int) instead
void	decrypt(byte[] inBuf, byte[] outBuf) Deprecated. use decrypt(byte[], int, byte[], int, int) instead
int	decrypt(byte[] inBuf, int nInPos, byte[] outBuf, int nOutPos, int nLen) Decrypts a byte buffer to another buffer, extra misaligned data will not be processed.
void	decrypt(int[] buf) Deprecated. use decrypt(int[], int, int[], int, int) instead
void	decrypt(int[] inBuf, int[] outBuf) Deprecated. use decrypt(int[], int, int[], int, int) instead
void	decrypt(int[] inBuf, int nInPos, int[] outBuf, int nOutPos, int nLen) Decrypts an integer buffer to another integer buffer.
void	decrypt(long[] buf) Deprecated. use decrypt(long[], int, long[], int, int) instead
void	decrypt(long[] inBuf, int nInPos, long[] outBuf, int nOutPos, int nLen) Decrypts an long buffer to another long buffer.
void	decrypt(long[] inBuf, long[] outBuf) Deprecated. use decrypt(long[], int, long[], int, int) instead
void	encrypt(byte[] buf) Deprecated. use encrypt(byte[], int, byte[], int, int) instead
void	encrypt(byte[] inBuf, byte[] outBuf) Deprecated. use encrypt(byte[], int, byte[], int, int) instead
int	encrypt(byte[] inBuf, int nInPos, byte[] outBuf, int nOutPos, int nLen) Encrypts a byte buffer to another buffer, extra misaligned data will not be processed.
void	encrypt(int[] buf) Deprecated. use encrypt(int[], int, int[], int, int) instead
void	encrypt(int[] inBuf, int[] outBuf) Deprecated. use encrypt(int[], int, int[], int, int) instead
void	encrypt(int[] inBuf, int nInPos, int[] outBuf, int nOutPos, int nLen) Encrypts an integer buffer to another integer buffer.
void	encrypt(long[] buf) Deprecated. use encrypt(long[], int, long[], int, int) instead
void	encrypt(long[] inBuf, int nInPos, long[] outBuf, int nOutPos, int nLen) Encrypts an long buffer to another long buffer.
void	encrypt(long[] inBuf, long[] outBuf) Deprecated. use encrypt(long[], int, long[], int, int) instead
protected int	encryptPrv(byte[] inBuf, int nInPos, byte[] outBuf, int nOutPos, int nLen)
void	initialize(byte[] key, int nOfs, int nLen) Initializes (or resets) the instances.
static boolean	selfTest() Selftest routine, for instance to check for a valid class file loading.
boolean	weakKeyCheck() To check if an instance actually was using a weak key, if so it might be better to use a different key or salt the existing one as alternative.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAXKEYLENGTH

public static final int MAXKEYLENGTH

maximum possible key length in bytes

See Also:

Constant Field Values

BLOCKSIZE

public static final int BLOCKSIZE

block size of this cipher (in bytes)

See Also:

Constant Field Values

Constructor Detail

BlowfishECB

public BlowfishECB()

The default constructor, call initialize() afterwards to do the final setup.

BlowfishECB

public BlowfishECB(byte[] key)

Deprecated. use BlowfishECB(byte[], int, int) instead

The default constructor, using a simple binary key.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

BlowfishECB

public BlowfishECB(byte[] key,
                   int nOfs,
                   int nLen)

See Also:

initialize(byte[], int, int)

Method Detail

initialize

public void initialize(byte[] key,
                       int nOfs,
                       int nLen)

Initializes (or resets) the instances.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

nOfs - where to start reading

nLen - number of bytes

cleanUp

public void cleanUp()

To clear data in the boxes before an instance is freed, the actual value of this call can be argued, yet still nice to have it.

selfTest

public static boolean selfTest()

Selftest routine, for instance to check for a valid class file loading.

Returns:

true: selftest passed / false: selftest failed

weakKeyCheck

public boolean weakKeyCheck()

To check if an instance actually was using a weak key, if so it might be better to use a different key or salt the existing one as alternative.

Returns:

true: weak key detected / false: key is fine

encryptPrv

protected int encryptPrv(byte[] inBuf,
                         int nInPos,
                         byte[] outBuf,
                         int nOutPos,
                         int nLen)

encrypt

public int encrypt(byte[] inBuf,
                   int nInPos,
                   byte[] outBuf,
                   int nOutPos,
                   int nLen)

Encrypts a byte buffer to another buffer, extra misaligned data will not be processed.

Parameters:

inBuf - buffer with plaintext data

nInPos - where to start reading the plaintext data

outBuf - buffer to put the ciphertext data

nOutPos - where to start writing the ciphertext data

nLen - number of bytes to encrypt

Returns:

number of bytes to encrypted

encrypt

public void encrypt(byte[] inBuf,
                    byte[] outBuf)

Deprecated. use encrypt(byte[], int, byte[], int, int) instead

Encrypts a byte buffer (should be aligned to a block border) to another buffer (of the same size or bigger).

Parameters:

inBuf - buffer with plaintext data

outBuf - buffer to get the ciphertext data

encrypt

public void encrypt(byte[] buf)

Deprecated. use encrypt(byte[], int, byte[], int, int) instead

Encrypts a byte buffer (should be aligned to a block border) to itself.

Parameters:

buf - buffer to encrypt

encrypt

public void encrypt(int[] inBuf,
                    int nInPos,
                    int[] outBuf,
                    int nOutPos,
                    int nLen)

Encrypts an integer buffer to another integer buffer.

Parameters:

inBuf - buffer with plaintext data

nInPos - where to start reading the plaintext data

outBuf - buffer to write the ciphertext data

nOutPos - where to start writing the ciphertext data

nLen - number of integers to encrypt

encrypt

public void encrypt(int[] inBuf,
                    int[] outBuf)

Deprecated. use encrypt(int[], int, int[], int, int) instead

Encrypts an integer buffer (should be aligned to a two integer border) to another int buffer (of the same size or bigger).

Parameters:

inBuf - buffer with ciphertext data

outBuf - buffer to get the plaintext data

encrypt

public void encrypt(int[] buf)

Deprecated. use encrypt(int[], int, int[], int, int) instead

Encrypts an integer buffer to itself.

Parameters:

buf - buffer to decrypt

encrypt

public void encrypt(long[] inBuf,
                    int nInPos,
                    long[] outBuf,
                    int nOutPos,
                    int nLen)

Encrypts an long buffer to another long buffer.

Parameters:

inBuf - buffer with plaintext data

nInPos - where to start reading the plaintext data

outBuf - buffer to write the ciphertext data

nOutPos - where to start writing the ciphertext data

nLen - number of longs to decrypt

encrypt

public void encrypt(long[] inBuf,
                    long[] outBuf)

Deprecated. use encrypt(long[], int, long[], int, int) instead

Encrypts a long buffer to another long buffer (of the same size or bigger).

Parameters:

inBuf - buffer with ciphertext data

outBuf - buffer to get the plaintext data

encrypt

public void encrypt(long[] buf)

Deprecated. use encrypt(long[], int, long[], int, int) instead

Encrypts a long buffer to itself.

Parameters:

buf - buffer to decrypt

decrypt

public int decrypt(byte[] inBuf,
                   int nInPos,
                   byte[] outBuf,
                   int nOutPos,
                   int nLen)

Decrypts a byte buffer to another buffer, extra misaligned data will not be processed.

Parameters:

inBuf - buffer with ciphertext data

nInPos - where to start reading the ciphertext data

outBuf - buffer to put the plaintext data

nOutPos - where to start writing the plaintext data

nLen - number of bytes to decrypt

Returns:

number of bytes to encrypted

decrypt

public void decrypt(byte[] inBuf,
                    byte[] outBuf)

Deprecated. use decrypt(byte[], int, byte[], int, int) instead

Decrypts a byte buffer (should be aligned to a block border) to another byte buffer (of the same size or bigger).

Parameters:

inBuf - buffer with ciphertext data

outBuf - buffer to get the plaintext data

decrypt

public void decrypt(byte[] buf)

Deprecated. use decrypt(byte[], int, byte[], int, int) instead

Decrypts a byte buffer (should be aligned) to itself.

Parameters:

buf - buffer to decrypt

decrypt

public void decrypt(int[] inBuf,
                    int nInPos,
                    int[] outBuf,
                    int nOutPos,
                    int nLen)

Decrypts an integer buffer to another integer buffer.

Parameters:

inBuf - buffer with ciphertext data

nInPos - where to start reading the ciphertext data

outBuf - buffer to get the plaintext data

nOutPos - where to start writing the plaintext data

nLen - number of integers to decrypt

decrypt

public void decrypt(int[] inBuf,
                    int[] outBuf)

Deprecated. use decrypt(int[], int, int[], int, int) instead

Decrypts an integer buffer (should be aligned to a two integer border) to another int buffer (of the same size or bigger).

Parameters:

inBuf - buffer with ciphertext data

outBuf - buffer to get the plaintext data

decrypt

public void decrypt(int[] buf)

Deprecated. use decrypt(int[], int, int[], int, int) instead

Decrypts an integer buffer to itself.

Parameters:

buf - buffer to decrypt

decrypt

public void decrypt(long[] inBuf,
                    int nInPos,
                    long[] outBuf,
                    int nOutPos,
                    int nLen)

Decrypts an long buffer to another long buffer.

Parameters:

inBuf - buffer with ciphertext data

nInPos - where to start reading the ciphertext data

outBuf - buffer to write the plaintext data

nOutPos - where to start writing the plaintext data

nLen - number of longs to decrypt

decrypt

public void decrypt(long[] inBuf,
                    long[] outBuf)

Deprecated. use decrypt(long[], int, long[], int, int) instead

Decrypts a long buffer to another long buffer (of the same size or bigger).

Parameters:

inBuf - buffer with ciphertext data

outBuf - buffer to get the plaintext data

decrypt

public void decrypt(long[] buf)

Deprecated. use decrypt(long[], int, long[], int, int) instead

Decrypts a long buffer to itself.

Parameters:

buf - buffer to decrypt