edu.northwestern.at.utils.crypto
Class Crypto

java.lang.Object
  edu.northwestern.at.utils.crypto.Crypto

public class Crypto
extends java.lang.Object

Cryptography utilities.

This static class is a port of the old Ph encryption code from C to Java.

Method Summary

static java.lang.String	crypt(java.lang.String str, java.lang.String salt) Encrypts a string using a salt.
static java.lang.String	encryptPassword(java.lang.String password) Encrypts a password.
static java.lang.String	encryptPhChallenge(java.lang.String password, java.lang.String challenge) Encrypts the response to a Ph challenge.

Methods inherited from class java.lang.Object

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

Method Detail

crypt

public static java.lang.String crypt(java.lang.String str,
                                     java.lang.String salt)

Encrypts a string using a salt.

This is the BSD "crypt" function ported to Java.

Parameters:

str - The string to encrypt.

salt - The salt string.

Returns:

The encrypted string.

encryptPassword

public static java.lang.String encryptPassword(java.lang.String password)

Encrypts a password.

The password is one-way encrypted by using the BSD "crypt" function to encrypt the password using itself as the salt.

Parameters:

password - The password to be encrypted.

Returns:

The encrypted password.

encryptPhChallenge

public static java.lang.String encryptPhChallenge(java.lang.String password,
                                                  java.lang.String challenge)

Encrypts the response to a Ph challenge.

Parameters:

password - The password entered by the user.

challenge - The challenge sent by the Ph server.

Returns:

The response to send to the Ph server in an "answer" command.