net.sourceforge.blowfishj

Class BlowfishEasy

java.lang.Object

net.sourceforge.blowfishj.BlowfishEasy

public class BlowfishEasy
extends java.lang.Object

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

Constructor Summary

Constructors

Constructor and Description
BlowfishEasy(char[] passw) Constructor to use string data as the key.
BlowfishEasy(java.lang.String sPassword) Deprecated. use the BlowfishEasy(char[]) instead, since this constructor discards the higher 8 bits of every 16bit Unicode character; be aware that this constructor will produce non-compatible results to the new method!

Method Summary

Modifier and Type	Method and Description
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 (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)

Deprecated. use the BlowfishEasy(char[]) instead, since this constructor discards the higher 8 bits of every 16bit Unicode character; be aware that this constructor will produce non-compatible results to the new method!

Constructor to set up a string as the key.

Parameters:

sPassword - the password

BlowfishEasy

public BlowfishEasy(char[] passw)

Constructor to use string data as the key.

Parameters:

passw - the password, usually gained by String.toCharArray()

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 (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.