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way to do external authentication



I'd like to use WHMCS as the billing system for our existing online service, but I'd rather not keep 2 sets of credentials.


What I need is a way to "hook" WHMCS' authentication and use our own code there.


What would happen is that when a user enters the username/password on a WHMCS page, rather than looking it up in WHMCS db, our custom code would perform the authentication check and return either a 'false', or return the WHMCS client id of the authenticated user.


Is there a way to do this with a hook or other modification?

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It would be easier to hook your existing system into the login for WHMCS, since you cannot directly modify the source for it. Its fairly simple to either test authentication using headers, or just use the API and do a "getclientpassword" API call. Something like this should work:


$email= $_POST['email'];
$password = md5($_POST['password']);

$whmcs_url = "https://yourdomain.com/whmcs/api.php";
$admin_uid = "admin";
$admin_pw = "password";

$data = select_query('tblclients', 'id', array('email'=>$email));
if (mysql_num_rows($data)) {
 $r = mysql_fetch_array($data);
 $userid = $r[0];
} else {
 print "Bad Email Address";

$postfields["username"] = $admin_uid;
$postfields["password"] = md5($admin_pw);
$postfields["action"] = "getclientpassword";
$postfields["userid"] = $userid;

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $whmcs_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 100);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
$cdata = curl_exec($ch);
$cdata = explode(";",$cdata);
foreach ($data AS $temp) {
 $temp = explode("=",$temp);
 $results[$temp[0]] = $temp[1];
if ($results['password']=="$password")  {
 print "Password Good";
} else {
 print "Password Bad";



Please note that this is completely untested and may not work at all.

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