• 15

A PHP Error was encountered

Severity: Notice

Message: Undefined index: userid

Filename: views/question.php

Line Number: 191


File: /home/prodcxja/public_html/questions/application/views/question.php
Line: 191
Function: _error_handler

File: /home/prodcxja/public_html/questions/application/controllers/Questions.php
Line: 433
Function: view

File: /home/prodcxja/public_html/questions/index.php
Line: 315
Function: require_once

name Punditsdkoslkdosdkoskdo

joomla password encryption

I need to access the joomla user table jos_users for login checking from external php script [codeignitor].

joomla storing password like this


Looks like this is not the normal MD5 ,so i cannot use md5(password) .

what is the possible way to create the password ?

Thank you.

      • 2
    • deep question :) and if you still think that md5 is the normal way to store passwords you might want to do a little more research on that
      • 1
    • Why don't you explain what it is exactly that you are trying to do. Is your purpose to reset or create a password from an external script? At first that was what it sounded like but now it sounds like you want something different. Are you trying to login?

Joomla passwords are MD5 hashed, but the passwords are salted before being hashed. They are stored in the database as {hash}:{salt} this salt is a random string 32 characters in length.

So to create a new password hash you would do md5($password.$salt)


Okay so for checking a password, say a user myguy enters the password mypassword, you would retrieve the row from the database that has username myguy.

In this row you'll find a password say 4e9e4bcc5752d6f939aedb42408fd3aa:0vURRbyY8Ea0tlvnTFn7xcKpjTFyn0YT. You split up the password hash and the salt:

$hashparts = preg_split (':' , $dbpassword);
echo $hashparts[0]; //this is the hash  4e9e4bcc5752d6f939aedb42408fd3aa
echo $hashparts[1]; //this is the salt  0vURRbyY8Ea0tlvnTFn7xcKpjTFyn0YT

now calculate the hash using this salt and the password myguy entered

$userhash = md5($userpassword.$hashparts[1]); // This would be 'mypassword' and the salt used in the original hash

Now if this $userhash and $hashparts[0] are identical the user has entered the correct password.

  • 62
Reply Report
      • 2
    • Did you use real data in this example? I got md5(mypassword0vURRbyY8Ea0tlvnTFn7xcKpjTFyn0YT) == 0ac1a27af8bc4f99edd278dde1fbd18b
      • 1
    • @noisy I did not use real data no. The hash and salt is from the question and I just made up the password, they won't match.
    • For an existing password just take the string after the : that's the salt. For creating a new password salt just generate a random string. As Er. Anurag Jain's stated in his answer you can easily do this with JUserHelper::genRandomPassword(32)
    • Sorry ,but still i cant find the answer to the question , assume that user have a pass hello ,but how i know that random number ? its generated & stored in db by JOOMLA ..

From joomla Forum, that's what happen behind:

A. Generate a password
B. Generate a string with 32 random characters
C. Concatenate Password (Step A) and RandomString (Step B)
D. Take md5(Result of Step C)
E. store Step D Result : Step B Result


Generate a password - Let 'testing'
Generate a string of 32 random characters - 'aNs1L5PajsIscupUskaNdPenustelsPe'
Concatenate Password and random string - testingaNs1L5PajsIscupUskaNdPenustelsPe
md5(Step C Result) - 5cf56p85sf15lpyf30c3fd19819p58ly
store step d:step B - 5cf56p85sf15lpyf30c3fd19819p58ly:aNs1L5PajsIscupUskaNdPenustelsPe

You can find code in Joomla like

$salt = JUserHelper::genRandomPassword(32);
$crypt = JUserHelper::getCryptedPassword("testing", $salt);
$password = $crypt . ':' . $salt;

Or We can Say

password DB field = md5(password + salt) + ":" + salt 

Where salt is random 32 char string.


  • 22
Reply Report
    • I am not about to register a new user ,i need to get the current string on the password field.So that i can match bother user given password and the password on the password field.
      • 1
    • md5 is a one way hash, which means you can only encrypt it but not reverse the decryption, its not possbile to do dycription You can do a thing that first fetch 32 car random string from db password , and with help of that security key create joomla type password from input password and match both...
    • hi joomla db password format is md5(password + salt) : salt where salt is a secret key so you can explode secret key from given password using : keyword...and then use that with your password to generate joomla type password and then match both password (generated by yoourself and db password) ... thanks
      • 2
    • This same question to, you. Did you use real data in this example? I got md5(testingaNs1L5PajsIscupUskaNdPenustelsPe) == 6e05e46fcc516a612a4afa9b9b7827c7

In joomla standard you can create password using the following way

             $salt = JUserHelper::genRandomPassword(32);
             $crypt = JUserHelper::getCryptedPassword($password_choose, $salt);
             $password = $crypt.':'.$salt;

you mention that you are accessing from external file(or programs) then if you have joomla installation on other side you can access it from outside the joomla structure.

using joomla default frame work like this

define( '_JEXEC', 1 );
define('JPATH_BASE', dirname(__FILE__) );//this is when we are in the root

require_once ( JPATH_BASE .DS.'includes'.DS.'defines.php' );
require_once ( JPATH_BASE .DS.'includes'.DS.'framework.php' );

$mainframe =& JFactory::getApplication('site');
  • 5
Reply Report

From the joomla source file libraries/joomla/crypt/password/simple.php there are multiple ways they get stored, and some do not have a ':' character.

    switch ($type)
        case '$2a$':
        case JCryptPassword::BLOWFISH:
            if (JCrypt::hasStrongPasswordSupport())
                $type = '$2y$';
                $type = '$2a$';

            $salt = $type . str_pad($this->cost, 2, '0', STR_PAD_LEFT) . '$' . $this->getSalt(22);

            return crypt($password, $salt);

        case JCryptPassword::MD5:
            $salt = $this->getSalt(12);

            $salt = '$1$' . $salt;

            return crypt($password, $salt);

        case JCryptPassword::JOOMLA:
            $salt = $this->getSalt(32);

            return md5($password . $salt) . ':' . $salt;

  • 2
Reply Report

Joomla! uses PhPass.


have a look here. you will see here how the password is generating.

The $2y is the default (and preferred) prefix on bcrypt hashes. As for code, you'll want to look inside JUserHelper's hashPassword and verifyPassword methods to see how Joomla's working with things right now.

Some Referances -




Check the links, I hope you it will helpful :)

  • 2
Reply Report

Joomla "understands" the passwords with "normal" md5.

What I've done in the past (to test a user's login), was to save the original password, encrypt a new one in md5, replace it in the database, test it with the browser (and it works) and when I was done, paste the original password in the database.

  • 0
Reply Report
$r = bin2hex(mcrypt_create_iv(16, MCRYPT_DEV_URANDOM));
$p = 'the_password';

$s = $p . $r;
$m = md5($s);

$out = $m . ':' . $r;
echo $out;

Len 16 because bin2hex doubles the character size, since 1 byte becomes 2 bytes

  • 0
Reply Report

If you just use md5($password); it'll work, try it. Joomla has a mechanism and it can work with multiple types of passwords (including, as of late, strong passwords). You don't have to worry about the part after the colon. Just use md5($password) and it'll definitely work.

By the way, this'll also work on Joomla 3.x.

  • -1
Reply Report

Warm tip !!!

This article is reproduced from Stack Exchange / Stack Overflow, please click

Trending Tags

Related Questions