ch.elca.el4j.util.encryption
Class PBEncryptor

java.lang.Object
  ch.elca.el4j.util.encryption.PBEncryptor

public class PBEncryptor
extends Object

En- / decrypts strings with a key derived from a user-supplied password with java's PBEStringEncryption (DES, MD5 password hash).

Author:

David Bernhard (DBD)

File-location:

PBEncryptor

Last check-in date:

2009-08-04 15:24:14 +0200 (Di, 04. Aug 2009) by swismer for revision 3882

Constructor Summary

PBEncryptor()
Constructor.

Method Summary

String	decrypt(String enc) Decrypts a string with the currently set password.
void	deriveKey(String password) Hashes the password and converts it to a suitable format for the cipher.
String	encrypt(String plain) Encrypts a string with the currently set password.

Methods inherited from class java.lang.Object

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

Constructor Detail

PBEncryptor

public PBEncryptor()
            throws EncryptionException

Constructor. As this lives in external we don't initialize with the internal password here.

Throws:

EncryptionException

Method Detail

deriveKey

public void deriveKey(String password)
               throws EncryptionException

Hashes the password and converts it to a suitable format for the cipher.

Parameters:

password - The password to generate a key from. Sets a valid key derived from the password.

Throws:

EncryptionException

encrypt

public String encrypt(String plain)
               throws EncryptionException

Encrypts a string with the currently set password.

Parameters:

plain - String.

Returns:

The encrypted string.

Throws:

EncryptionException

decrypt

public String decrypt(String enc)
               throws EncryptionException

Decrypts a string with the currently set password.

Parameters:

enc - String.

Returns:

The decrypted string.

Throws:

EncryptionException