BlowfishJ
Class BlowfishEasy

java.lang.Object
  |
  +--BlowfishJ.BlowfishEasy

public class BlowfishEasy
extends java.lang.Object

Support class for easy string encryption with the Blowfish algorithm, now in CBC mode with a SHA-1 key setup and correct padding - the purposes of this module is mainly to show a possible implementation with Blowfish.

Version:
January 28, 2003
Author:
Markus Hahn

Constructor Summary
BlowfishEasy(java.lang.String sPassword)
          Constructor to set up a string as the key.
 
Method Summary
 java.lang.String decryptString(java.lang.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
 java.lang.String encryptString(java.lang.String sPlainText)
          Encrypts a string (treated in Unicode) using the internal random generator.
 java.lang.String encryptString(java.lang.String sPlainText, java.util.Random rndGen)
          Encrypts a string (treated in Unicode).
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

BlowfishEasy

public BlowfishEasy(java.lang.String sPassword)
Constructor to set up a string as the key.
Parameters:
sPassword - the password
Method Detail

encryptString

public java.lang.String encryptString(java.lang.String sPlainText)
Encrypts a string (treated in Unicode) using the internal random generator.
Parameters:
sPlainText - string to encrypt
Returns:
encrypted string in binhex format

encryptString

public java.lang.String encryptString(java.lang.String sPlainText,
                                      java.util.Random rndGen)
Encrypts a string (treated in Unicode).
Parameters:
sPlainText - string to encrypt
rndGen - random generator (usually a java.security.SecureRandom instance)
Returns:
encrypted string in binhex format

decryptString

public java.lang.String decryptString(java.lang.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