Call SOAP method via CURL in PHP,call require client authentication

OVERVIEW:

The code is about making call to the escreen web service using SOAP and Curl with client authentication required. Currently I am not getting any result only HTTP 403 and 500 errors.
The call requires client authenticate cert to be on the callng site.

CODE:


    $content = "<TicketRequest>
      <Version>1.0</Version>
      <Mode>Test</Mode>
      <CommitAction></CommitAction>
      <PartnerInfo>
      <UserName>xxxxxxxxxx</UserName>
      <Password>xxxxxxxxxxx</Password>
      </ PartnerInfo>
      <RequestorOrderID></RequestorOrderID>
      <CustomerIdentification>
        <IPAddress></IPAddress>
        <ClientAccount>xxxxxxxxxx</ClientAccount>
        <ClientSubAccount>xxxxxxxxxx</ClientSubAccount>
        <InternalAccount></InternalAccount>
        <ElectronicClientID></ElectronicClientID>
      </CustomerIdentification>
      <TicketAction>
        <Type></Type>
        <Params>
          <Param>
          <ID>4646</ID>
          <Value></Value>
          </Param>
        </Params>
      </TicketAction>
    </TicketRequest>";
    
    $wsdl  = "https://services.escreen.com/SingleSignOnStage/SingleSignOn.asmx";
    
    $headers = array(  "Content-type: text/xml;charset=\\"utf-8\\"", 
         "Accept: text/xml", 
         "Cache-Control: no-cache", 
         "Pragma: no-cache", 
      //   "SOAPAction: \\"\\"", 
         "Content-length: ".strlen($content),
        ); 
     
    
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_URL, $wsdl); 
    curl_setopt($ch, CURLOPT_HEADER, 1); 
    curl_setopt($ch, CURLOPT_VERBOSE, '1');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt($ch, CURLOPT_POSTFIELDS, $content); 
    
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, '1');
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, '1');
    //curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: text/xml"));
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
    //curl_setopt($ch, CURLOPT_HTTPHEADER, array('SOAPAction: ""')); 
    curl_setopt($ch, CURLOPT_CAPATH, '/home/pps/');
    curl_setopt($ch, CURLOPT_CAINFO,  '/home/pps/authority.pem');
    curl_setopt($ch, CURLOPT_SSLCERT, 'PROTPLUSSOL_SSO.pem');
    curl_setopt($ch, CURLOPT_SSLCERTPASSWD, 'xxxxxxxxxxxx');
    
    $output = curl_exec($ch);
    
    // Check if any error occured
    if(curl_errno($ch))
    {
        echo 'Error no : '.curl_errno($ch).' Curl error: ' . curl_error($ch);
    }
    
    print_r($output);

QUESTIONS:

  1. I need to call the RequestTicket method and pass the XML string to it.
    I don’t know how to do it here(pass the method name to call).

  2. For client authentication they gave us three certs, one root cert, one intermediate
    cert and a client authentication cert PROTPLUSSOL_SSOpem(it was a .pfx file). Since we are on linux we converted them to pem . In curl calls I could not find way to how to include both the root cert and the intermediate cert ,so I combined them by making a new pem file and copying the intermediate cert and them the root cert and naming it authority.pem .
    I am not sure whether it works or not and would like your opinion.

  3. For the current code Iam getting the error
    Error no : 77 Curl error: error setting certificate verify locations: CAfile: /home/pps/authority.pem CApath: /home/pps/

If I disable the curl error message,I am getting blank page with page title 403 - Forbidden. Access is denied.

If I comment out the CURLOPT_CAPATH and CURLOPT_CAINFO lines it gives http 500 error page with the message as content and the following at the top.

> HTTP/1.1 500 Internal Server Error. Cache-Control: private Content-Type: text/html Server: Microsoft-IIS/7.5 X-AspNet-Version: 1.1.4322 X-Powered-By: ASP.NET Date: Thu, 02 Sep 2010 14:46:38 GMT Content-Length: 1208

If I comment out as above and also CURLOPT_SSLCERT and CURLOPT_SSLCERTPASSWD it gives 403 error with the message as content.

So I would request you to help me out by pointing out whats wrong with the current code.

Thank you.