public final Class ByteArrayGuardAESCTR

Class Inheritance

extends Object

java.lang.Object
com.sun.faces.util.ByteArrayGuardAESCTR

Imports

java.nio.charset.Charset, java.security.InvalidAlgorithmParameterException, .InvalidKeyException, .NoSuchAlgorithmException, .SecureRandom, javax.crypto.Cipher, .KeyGenerator, .SecretKey, .BadPaddingException, .IllegalBlockSizeException, .NoSuchPaddingException, javax.crypto.spec.IvParameterSpec, .SecretKeySpec, javax.faces.FacesException, java.util.SortedMap, java.util.logging.Level, .Logger, javax.naming.InitialContext, .NamingException, javax.xml.bind.DatatypeConverter

This utility class is to provide both encryption and decryption Ciphers to ResponseStateManager implementations wishing to provide encryption support.

The algorithm used to encrypt byte array is AES with CBC.

Original author Inderjeet Singh, J2EE Blue Prints Team. Modified to suit JSF needs.

Field Summary

Modifier and Type	Field and Description
private static final String	CIPHER_CODE
private static final int	IV_LENGTH
private IvParameterSpec	ivspec
private static final String	KEY_ALGORITHM
private static final int	KEY_LENGTH
private static final Logger	LOGGER
private SecretKey	sk
private Charset	utf8

Constructor Summary

Access	Constructor and Description
public	ByteArrayGuardAESCTR()

Method Summary

Modifier and Type	Method and Description
public String	decrypt(String value)
public String	Returns: the encrypted byte array. encrypt(String The byte array to be encrypted. value) This method: Encrypts bytes using a cipher.
private void	setupKeyAndCharset()

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

CIPHER_CODE	back to summary
private static final String CIPHER_CODE

IV_LENGTH	back to summary
private static final int IV_LENGTH

ivspec	back to summary
private IvParameterSpec ivspec

KEY_ALGORITHM	back to summary
private static final String KEY_ALGORITHM

KEY_LENGTH	back to summary
private static final int KEY_LENGTH

LOGGER	back to summary
private static final Logger LOGGER

sk	back to summary
private SecretKey sk

utf8	back to summary
private Charset utf8

Constructor Detail

ByteArrayGuardAESCTR	back to summary
public ByteArrayGuardAESCTR()

Method Detail

decrypt	back to summary
public String decrypt(String value) throws InvalidKeyException

encrypt	back to summary
public String encrypt(String value) This method: Encrypts bytes using a cipher. Generates MAC for intialization vector of the cipher Generates MAC for encrypted data Returns a byte array consisting of the following concatenated together: \|MAC for cnrypted Data \| MAC for Init Vector \| Encrypted Data \| Parameters value:String The byte array to be encrypted. Returns:String the encrypted byte array.

encrypt

back to summary

public String encrypt(String value)

This method: Encrypts bytes using a cipher. Generates MAC for intialization vector of the cipher Generates MAC for encrypted data Returns a byte array consisting of the following concatenated together: |MAC for cnrypted Data | MAC for Init Vector | Encrypted Data |

Parameters

value:String: The byte array to be encrypted.

Returns:String

the encrypted byte array.

setupKeyAndCharset	back to summary
private void setupKeyAndCharset()