Package org.jivesoftware.util

Class Blowfish

java.lang.Object

org.jivesoftware.util.Blowfish

All Implemented Interfaces:

Encryptor

public class Blowfish
extends Object
implements Encryptor

A class that provides easy Blowfish encryption.

Author:

Markus Hahn <markus_hahn@gmx.net>, Gaston Dombiak

Constructor Summary

Constructors

Constructor	Description
Blowfish()	Creates a new Blowfish object using the default key
Blowfish(String password)	Creates a new Blowfish object using the specified key (oversized password will be cut).

Method Summary

Modifier and Type	Method	Description
String	decrypt(String value)	Decrypt an encrypted String.
String	decrypt(String value, byte[] iv)	Decrypt an encrypted String.
String	decryptString(String sCipherText)	decrypts a hexbin string (handling is case sensitive)
void	destroy()	destroys (clears) the encryption engine, after that the instance is not valid anymore
String	encrypt(String value)	Encrypt a clear text String.
String	encrypt(String value, byte[] iv)	Encrypt a clear text String.
String	encryptString(String sPlainText)	Encrypts a string (treated in UNICODE).
void	setKey(String key)	Set the encryption key.

Methods inherited from class java.lang.Object

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

Constructor Detail

Blowfish

public Blowfish()

Creates a new Blowfish object using the default key

Blowfish

public Blowfish(String password)

Creates a new Blowfish object using the specified key (oversized password will be cut).

Parameters:

password - the password (treated as a real unicode array)

Method Detail

encryptString

public String encryptString(String sPlainText)

Encrypts a string (treated in UNICODE).

Parameters:

sPlainText - string to encrypt

Returns:

encrypted string in binhex format

decryptString

public String decryptString(String sCipherText)

decrypts a hexbin string (handling is case sensitive)

Parameters:

sCipherText - hexbin string to decrypt

Returns:

decrypted string (null equals an error)

destroy

public void destroy()

destroys (clears) the encryption engine, after that the instance is not valid anymore

encrypt

public String encrypt(String value)

Description copied from interface: Encryptor

Encrypt a clear text String.

Specified by:

encrypt in interface Encryptor

Parameters:

value - The clear text attribute

Returns:

The encrypted attribute, or null

encrypt

public String encrypt(String value,
                      byte[] iv)

Description copied from interface: Encryptor

Encrypt a clear text String.

Specified by:

encrypt in interface Encryptor

Parameters:

value - The clear text attribute

iv - The IV to use, or null for the default IV

Returns:

The encrypted attribute, or null

decrypt

public String decrypt(String value)

Description copied from interface: Encryptor

Decrypt an encrypted String.

Specified by:

decrypt in interface Encryptor

Parameters:

value - The encrypted attribute in Base64 encoding

Returns:

The clear text attribute, or null

decrypt

public String decrypt(String value,
                      byte[] iv)

Description copied from interface: Encryptor

Decrypt an encrypted String.

Specified by:

decrypt in interface Encryptor

Parameters:

value - The encrypted attribute in Base64 encoding

iv - The IV to use, or null for the default IV

Returns:

The clear text attribute, or null

setKey

public void setKey(String key)

Description copied from interface: Encryptor

Set the encryption key. This will apply the user-defined key, truncated or filled (via the default key) as needed to meet the key length specifications.

Specified by:

setKey in interface Encryptor

Parameters:

key - The encryption key