de.intarsys.tools.authenticate
Class PasswordTools

java.lang.Object
  de.intarsys.tools.authenticate.PasswordTools

public class PasswordTools
extends Object

A tool class for handling passwords and authentication

Constructor Summary

PasswordTools()

Method Summary

static char[]	createRandom(int length) Create a random password of length length.
static byte[]	decrypt(byte[] bytes) Decrypt a byte array which was previously encrypted using encrypt.
static char[]	decrypt(String value) Decrypt a string which was previously encrypted using encrypt.
static byte[]	encrypt(byte[] bytes) Encrypt a clear text array of bytes.
static String	encrypt(char[] value) Encrypt a clear text array of chars.
static String	hash(char[] password) A one way hash for a clear text password.
static void	initialize(byte[] salt, char[] passphrase) Initialize the PasswordTools.

Methods inherited from class java.lang.Object

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

Constructor Detail

PasswordTools

public PasswordTools()

Method Detail

createRandom

public static char[] createRandom(int length)

Create a random password of length length.

Parameters:

length -

Returns:

A new random password.

decrypt

public static byte[] decrypt(byte[] bytes)

Decrypt a byte array which was previously encrypted using encrypt. Provided the same salt and passphrase are used for initialization, this method returns the original unencrypted input.

Parameters:

bytes -

Returns:

The decrypted representation of bytes

decrypt

public static char[] decrypt(String value)

Decrypt a string which was previously encrypted using encrypt. Provided the same salt and passphrase are used for initialization, this method returns the original unencrypted input.

Parameters:

value -

Returns:

The decrypted representation of value

encrypt

public static byte[] encrypt(byte[] bytes)

Encrypt a clear text array of bytes. The result is the plain encrypted byte array.

Parameters:

bytes -

Returns:

The encrpyted representation of bytes

encrypt

public static String encrypt(char[] value)

Encrypt a clear text array of chars. The result is a Base64 encoded string version of the encrypted UTF-8 encoded input bytes.

Parameters:

value -

Returns:

An encrypted, invertible representation of value

hash

public static String hash(char[] password)

A one way hash for a clear text password.

Parameters:

password -

Returns:

A one way hash for a clear text password.

initialize

public static void initialize(byte[] salt,
                              char[] passphrase)

Initialize the PasswordTools.

Parameters:

salt -

passphrase -