edu.vt.middleware.crypt.symmetric
Class RC2

java.lang.Object
  edu.vt.middleware.crypt.AbstractAlgorithm
      edu.vt.middleware.crypt.AbstractEncryptionAlgorithm
          edu.vt.middleware.crypt.symmetric.SymmetricAlgorithm
              edu.vt.middleware.crypt.symmetric.RC2

All Implemented Interfaces:

Algorithm, EncryptionAlgorithm

public class RC2
extends SymmetricAlgorithm

Provider of symmetric encryption/decryption operations using RC2 cipher.

Version:

$Revision: 2744 $

Author:

Middleware Services

Field Summary

static String

ALGORITHM Algorithm name.

Fields inherited from class edu.vt.middleware.crypt.symmetric.SymmetricAlgorithm

DEFAULT_MODE, DEFAULT_PADDING, iv, paramSpec

Fields inherited from class edu.vt.middleware.crypt.AbstractEncryptionAlgorithm

cipher, cipherMode, key, mode, padding

Fields inherited from class edu.vt.middleware.crypt.AbstractAlgorithm

algorithm, logger, randomByteSize, randomProvider

Constructor Summary

RC2()
Creates a default RC2 symmetric encryption algorithm using CBC mode and PKCS5 padding.

RC2(String mode, String padding)
Creates a default RC2 symmetric encryption algorithm using the given mode and padding style.

Method Summary

protected AlgorithmParameterSpec	getAlgorithmParameterSpec() Gets the algorithm parameter specification for this algorithm.
static int	getEffectiveBits(int version) Gets the number of effective bits for a given RC2Version code.
int	getEffectiveKeyBits() Gets the effective key size in bits.
static int	getVersion(int effectiveBits) Gets the RC2Version code for a given effective bits value.
void	setEffectiveKeyBits(int numBits) Sets the effective key size in bits.

Methods inherited from class edu.vt.middleware.crypt.symmetric.SymmetricAlgorithm

clone, getAllowedKeyLengths, getChunkSize, getMaxKeyLength, getMinKeyLength, getRandomIV, hasIV, isValidKeyLength, newInstance, newInstance, newInstance, newInstance, setIV

Methods inherited from class edu.vt.middleware.crypt.AbstractEncryptionAlgorithm

crypt, crypt, decrypt, decrypt, decrypt, encrypt, encrypt, encrypt, getBlockSize, getCipherMode, getMode, getPadding, init, initCipher, initDecrypt, initEncrypt, setKey, toString

Methods inherited from class edu.vt.middleware.crypt.AbstractAlgorithm

getAlgorithm, getRandomData, setRandomProvider

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.vt.middleware.crypt.Algorithm

getAlgorithm, getRandomData, setRandomProvider

Field Detail

ALGORITHM

public static final String ALGORITHM

Algorithm name.

See Also:

Constant Field Values

Constructor Detail

RC2

public RC2()

Creates a default RC2 symmetric encryption algorithm using CBC mode and PKCS5 padding.

RC2

public RC2(String mode,
           String padding)

Creates a default RC2 symmetric encryption algorithm using the given mode and padding style.

Parameters:

mode - Cipher mode name.

padding - Cipher padding style name.

Method Detail

getEffectiveBits

public static int getEffectiveBits(int version)

Gets the number of effective bits for a given RC2Version code.

Parameters:

version - RC2Version code.

Returns:

Number of effective bits for given version.

getVersion

public static int getVersion(int effectiveBits)

Gets the RC2Version code for a given effective bits value.

Parameters:

effectiveBits - Effective bits corresponding to a particular RC2Version encoded value.

Returns:

RC2Version code for given effective bits.

getEffectiveKeyBits

public int getEffectiveKeyBits()

Gets the effective key size in bits. This is a parameter specific to the RC2 cipher algorithm.

Returns:

Effective key size in bits.

setEffectiveKeyBits

public void setEffectiveKeyBits(int numBits)

Sets the effective key size in bits. This is a parameter specific to the RC2 cipher algorithm.

Parameters:

numBits - Effective key size in bits; MUST be positive integer.

getAlgorithmParameterSpec

protected AlgorithmParameterSpec getAlgorithmParameterSpec()

Gets the algorithm parameter specification for this algorithm.

Overrides:

getAlgorithmParameterSpec in class SymmetricAlgorithm

Returns:

Algorithm parameter specification specific to this algorithm.