org.globalse.arena.frag.security
Class PasswordChecker

java.lang.Object
  |
  +--org.globalse.arena.frag.security.PasswordChecker

public class PasswordChecker

extends java.lang.Object

The PasswordChecker class is responsible for checking a password usind a MD5 hash. A possible schema for the passowrd exchange: 1. A generates some random data - this random data is stored in this class 2. A sends the random data to B - getRandom() 3. B appends the random data to the password - PasswordChecker(random) 4. B generates a MD5 hash from the combined data block - hashPassword() 5. B sends the hash to A 6. A appends the random data to the password - hashPassword() 7. A generates a MD5 hash from the combined data block 8. A compares the calculated MD5 hash to the received one. If they are equal, the password comparison was successful. * $Id: PasswordChecker.html,v 1.1 2003/02/12 18:06:20 schoecke Exp $

Constructor Summary

PasswordChecker()

 

Method Summary
boolean	checkHash(java.lang.String password, java.lang.String random, java.lang.String hash)           Method for checking wether the hash is valid i.e.
java.lang.String	hashPassword(java.lang.String password, java.lang.String random)           Method for creating a hash from a password and a random number.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

PasswordChecker

public PasswordChecker()

checkHash

public boolean checkHash(java.lang.String password,
                         java.lang.String random,
                         java.lang.String hash)
                  throws java.security.NoSuchAlgorithmException

Method for checking wether the hash is valid i.e. the hash contains the password, that has to be validated

Parameters:

password - String the password for the game

random - String random

hash - String string for the hashtable

Returns:

if the check was successful

Throws:

java.security.NoSuchAlgorithmException - if the alogr. not exists

hashPassword

public java.lang.String hashPassword(java.lang.String password,
                                     java.lang.String random)
                              throws java.security.NoSuchAlgorithmException

Method for creating a hash from a password and a random number.

Parameters:

password - String the password for the game

random - String random

Returns:

the created hash as a hexadecimal value

Throws:

java.security.NoSuchAlgorithmException - if the alogr. not exists