ewe.security
Class BlowfishCBC

java.lang.Object
  ewe.security.BlowfishECB
      ewe.security.BlowfishCBC

public class BlowfishCBC

extends BlowfishECB

Implementation of the Blowfish encryption algorithm in CBC mode.

Field Summary

Fields inherited from class ewe.security.BlowfishECB

BLOCKSIZE, MAXKEYLENGTH

Constructor Summary

BlowfishCBC(byte[] key)
Default constructor, uses a zero CBC IV.

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

BlowfishCBC(byte[] key, int nOfs, int nLen)
Constructor, uses a zero CBC IV.

BlowfishCBC(byte[] key, int nOfs, int nLen, byte[] initCBCIV, int nIVOfs)
Constructor to define the CBC IV.

BlowfishCBC(byte[] key, int nOfs, int nLen, long lInitCBCIV)
Constructor to define the CBC IV.

BlowfishCBC(byte[] key, long lInitCBCIV)
Deprecated. use BlowfishCBC(byte[], int, int, long) instead

Method Summary

void	cleanUp() see BlowfishJ.BlowfishECB#cleanUp()
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.
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.
long	getCBCIV() Gets the current CBC IV.
void	getCBCIV(byte[] dest) Deprecated. use getCBCIV(byte[], int) instead
void	getCBCIV(byte[] dest, int nOfs) Gets a copy of the current CBC IV.
void	reset(byte[] key, int offset, int length) Reset the Encryptor/Decryptor using a specific key.
void	setCBCIV(byte[] newCBCIV) Deprecated. use setCBCIV(byte[], int) instead
void	setCBCIV(byte[] newCBCIV, int nOfs) Sets the current CBC IV (for cipher resets).
void	setCBCIV(long lNewCBCIV) Sets the current CBC IV (for cipher resets).

Methods inherited from class ewe.security.BlowfishECB

byteArrayToInt, encryptPrv, initialize, reset, weakKeyCheck

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, toString

Constructor Detail

BlowfishCBC

public BlowfishCBC(byte[] key)

Default constructor, uses a zero CBC IV.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

BlowfishCBC

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

Constructor, uses a zero CBC IV.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

nOfs - where to start reading the key

nLen - size of the key in bytes

BlowfishCBC

public BlowfishCBC(byte[] key,
                   long lInitCBCIV)

Deprecated. use BlowfishCBC(byte[], int, int, long) instead

Constructor to define the CBC IV.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

lInitCBCIV - the CBC IV

BlowfishCBC

public BlowfishCBC(byte[] key,
                   int nOfs,
                   int nLen,
                   long lInitCBCIV)

Constructor to define the CBC IV.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

nOfs - where to start reading the key

nLen - size of the key in bytes

lInitCBCIV - the CBC IV

BlowfishCBC

public BlowfishCBC(byte[] key,
                   byte[] initCBCIV)

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

Constructor to define the CBC IV.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

initCBCIV - the CBC IV (array with BLOCKSIZE bytes)

BlowfishCBC

public BlowfishCBC(byte[] key,
                   int nOfs,
                   int nLen,
                   byte[] initCBCIV,
                   int nIVOfs)

Constructor to define the CBC IV.

Parameters:

key - key material, up to MAXKEYLENGTH bytes

nOfs - where to start reading the key

nLen - size of the key in bytes

initCBCIV - the CBC IV

nIVOfs - where to start reading the IV

Method Detail

getCBCIV

public long getCBCIV()

Gets the current CBC IV.

Returns:

current CBC IV

getCBCIV

public void getCBCIV(byte[] dest)

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

Gets a copy of the current CBC IV.

Parameters:

dest - where to put current CBC IV

getCBCIV

public void getCBCIV(byte[] dest,
                     int nOfs)

Gets a copy of the current CBC IV.

Parameters:

dest - buffer

nOfs - where to start writing

setCBCIV

public void setCBCIV(long lNewCBCIV)

Sets the current CBC IV (for cipher resets).

Parameters:

lNewCBCIV - the new CBC IV

setCBCIV

public void setCBCIV(byte[] newCBCIV)

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

Sets the current CBC IV (for cipher resets).

Parameters:

newCBCIV - the new CBC IV

setCBCIV

public void setCBCIV(byte[] newCBCIV,
                     int nOfs)

Sets the current CBC IV (for cipher resets).

Parameters:

newCBCIV - the new CBC IV

nOfs - where to start reading the IV

reset

public void reset(byte[] key,
                  int offset,
                  int length)

Description copied from class: BlowfishECB

Reset the Encryptor/Decryptor using a specific key.

Overrides:

reset in class BlowfishECB

cleanUp

public void cleanUp()

see BlowfishJ.BlowfishECB#cleanUp()

Overrides:

cleanUp in class BlowfishECB

encrypt

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

Description copied from class: BlowfishECB

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

Overrides:

encrypt in class BlowfishECB

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

See Also:

BlowfishJ.BlowfishECB#encrypt(byte[], int, byte[], int, int)

decrypt

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

Description copied from class: BlowfishECB

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

Overrides:

decrypt in class BlowfishECB

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

See Also:

BlowfishJ.BlowfishECB#decrypt(byte[], int, byte[], int, int)