How can i get my PHP SoapClient to Authenticate with Digest - php

Question

I currently have a vb.net ASMX web service hosted on IIS along with a PHP page which is calling the web service via a SoapClient.
I need to authenticate the webservice against ActiveDirectory and i figured the easiest way to do this would be to enable Digest Authentication on IIS and allow the user to enter their AD username/password into the PHP page and send this authentication in the SoapHeaders.
I am not really quite sure how to go about this, especially when trying to contact the WSDL (which is also behind the Digest Authentication).
Any help would be appreciated.
Thanks
EDIT: What i've tried:
SERVICE_URL points to http://mypage/service.asmx?wsdl
Attempt 1: User and Pass as MD5
$options = array(
'authentication' => SOAP_AUTHENTICATION_DIGEST,
'realm' => 'myrealm',
'login' => $_SESSION['authUser'],
'password' => $_SESSION['authPass']
);
try { $client = new SoapClient(SERVICE_URL, $options); }
Attempt 2: Auth is the 'user':'realm':'pass' as MD5:
$options = array(
'authentication' => SOAP_AUTHENTICATION_DIGEST,
'login' => $_SESSION['auth']
);
try { $client = new SoapClient(SERVICE_URL, $options); }

Answer 1

You can add headers to your soap client using SoapHeader() class/object (SoapHeader() documentation) and soap object operator __setSoapHeaders() (__setSoapHeaders() documentation).
Your request would look something like this:
<?php
$options = array(
'authentication' => SOAP_AUTHENTICATION_DIGEST,
'realm' => 'myrealm',
'login' => $_SESSION['authUser'],
'password' => $_SESSION['authPass']
);
try {
$client = new SoapClient(SERVICE_URL, $options);
// create and populate header array
$headers = array();
$headers[] = new SoapHeader('MYNAMESPACE',
'authentication',
'SOAP_AUTHENTICATION_DIGEST');
$headers[] = new SoapHeader('MYNAMESPACE',
'realm',
'myrealm');
$client->__setSoapHeaders($headers); // set headers
$client->__soapCall("echoVoid", null); // make soap call
}
?>