Hi.
I purchased some software recently but have been unable get any helpful product support with the following problem, because it's a coding matter, I guess. The purchased software is for a PayPal subscription management system, and it relies on user verification by way of a username (email address) and a hashed password.

I have developed my own login scripts which use a hashed md5 password and all that is fine.I want to integrate my scripts with the purchased software using the supplied mySql database tables.

My problem is that the supplied software goes a step further than a hashed md5 password by applying initializing vectors to the hashed password. I cannot figure out how to modify my login code to accommodate the encrypted password that appears in the database.

It is beyond my current abilities to figure this out on my own. I'd really appreciate it if anyone can help.

I've attached my own login script below, and Ive attached what I think is the decryption code that comes with the purchased software. There is also a database file.

Hope someone can help me.

<?php
session_start();
if ($_POST['password']) {
//Connect to the database 
    include_once "db_connect.php";    

$email = stripslashes($_POST['payer_email']);
$email = strip_tags($email);
$email = mysql_real_escape_string($email);
$password = preg_replace("/[^A-Za-z0-9]/", "", $_POST['password']); // filter everything but numbers and letters
$password = md5($password);
// Make query and then register all relevant database data into SESSION variables.
$sql = mysql_query("SELECT * FROM sec_tblusers WHERE payer_email='$email' AND password='$password' AND signedup='1'") or die("failed"); 
$login_check = mysql_num_rows($sql);
if($login_check > 0){ 
    while($row = mysql_fetch_array($sql)){ 
        // Get member data into a session variable
        $id = $row["recid"];   

        session_register('recid'); 
        $_SESSION['recid'] = $id;

    $payer_email = $row["payer_email"]; 
    session_register('payer_email'); 
    $_SESSION['payer_email'] = $payer_email;

    $password = $row["password"]; 
    session_register('password'); 
    $_SESSION['password'] = $password;        

    $iv = $row["iv"]; 
    session_register('iv'); 
    $_SESSION['iv'] = $iv;

    $signedup = $row["signedup"]; 
    session_register('signedup'); 
    $_SESSION['signedup'] = $signedup;

    $lastlogin = $row["lastlogin"]; 
    session_register('lastlogin'); 
    $_SESSION['lastlogin'] = $lastlogin;

    // Update last_log_date field for this member now
    mysql_query("UPDATE sec_tblusers SET lastlogin=now() WHERE recid='$id'");
    // Print success message here then exit the script
    //header("location: member_profile.php?id=$id"); 
    header("location: adduser.php?id=$id"); 
    exit();
} // close while
} else {
// Print login failure message to the user and link them back to your login page
  print '<br /><br /><font color="#FF0000">You do not show in our records as a subscriber. Has the subscription expired?</font><br />
<br /><a href="../main.php">Click here</a> to go back.';
  exit();
}
}// close if post
?>

What I believe is the decrypting code that comes with the purchased software goes like this.

<?php

//Given the payer_email address, return the decrypted password
function getpassword($payer_email, $dbhost, $dbusername, $dbpass, $dbname, $dbprefix, &$message) {

$dl = new DataLayer();
$dl->debug=false;
$dl->connect( $dbhost, $dbusername, $dbpass, $dbname )  or die ( "Database connection error " . $dl->geterror() );

//SELECT password, iv FROM sec_tblusers WHERE payer_email = '" . $payer_email . "'"
$cols = array("password", "iv");
$table = $dl->select( $dbprefix."sec_tblusers", "", $cols, "payer_email = '$payer_email'", "" );

if ($dl->geterror()) {
    $message = "SQL error - user.php ref 58 " . $dl->geterror();
    exit;
}

$IV = $table[0]['iv'];
$password = $table[0]['password'];

$decryption = new password($IV, $password);
$decryption->decode();
$decode = $decryption->getdecodedtext();

return $decode;

}

?>

The database table is here.

[CODE]-- Table structure for table sec_tblusers

CREATE TABLE sec_tblusers (
recid int(11) NOT NULL AUTO_INCREMENT,
payer_email varchar(100) NOT NULL,
password varchar(50) DEFAULT NULL,
iv int(11) DEFAULT NULL,
signedup int(11) NOT NULL DEFAULT '0',
signupdate datetime NOT NULL,
lastlogin datetime NOT NULL,
PRIMARY KEY (recid),
UNIQUE KEY payer_email (payer_email),
KEY password (password),
KEY signedup (signedup),
KEY lastlogin (lastlogin),
KEY signupdate (signupdate)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=22 ;

--

-- Dumping data for table sec_tblusers

INSERT INTO sec_tblusers (recid, payer_email, password, iv, signedup, signupdate, lastlogin) VALUES
(5, 'someone@gmail.com', 'cRbeAWgN3 ', 316, 1, '0000-00-00 00:00:00', '2010-11-10 22:29:06'),
(6, 'someoneelse@gmail.com', 'cRbeAWgN3 ', 269, 1, '0000-00-00 00:00:00', '0000-00-00 00:00:00');[/CODE]

I suspect that there may be some other relevant code in the purchased software, and I could hunt that up if someone could tell me what to look for.

Anyway, I'm really in need of some help, or some advice.

Cheers, everyone.

    facarroll wrote:

    The purchased software is for a PayPal subscription management system, and it relies on user verification by way of a username (email address) and a hashed password.

    How is this actually supposed to work? For example, can the user login directly to this subscription management system, or are they only able to login via your own scripts.

    For the former, you have the problem in that you cannot (easily) obtain your users' passwords in their original form (and that is the whole point of using a cryptographic hash algorithm like MD5 in the first place). You can easily get them when they next login to your system, of course, but until then you cannot enter that information to this subscription management system.

    For the latter, no problem: just use the hashed passwords that you have now as the passwords to the subscription management system.

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