Description:
------------
Hi, 
   I have been trying to access webservice in asp.net using php client. The webservice requires the use of a certificate, 
   I've downloaded the certificate from a CA server thats from a 
windows server 2008 and the client certificate has  a  .cer extension. 
When I use the certificate from an asp.net client  the webservice is 
consumed, but when I try it from php  I get a warning and an error 

Reproduce code:
---------------
$soap = new SoapClient('https://192.168.51.212/test.asmx?wsdl', array 
(  'local_cert'        => './path/nkCert.cer' 
        )); 
                } 
        catch (Exception $e) 
        { 
           echo "Caught exception: ". $e->getMessage() . "\n"; 
        } 




Actual result:
--------------
  Warning: SoapClient::SoapClient() [soapclient.soapclient]: Unable 
to set private key file `C:\xampp\htdocs\path\nkCert.cer' in C:\xampp 
\htdocs\CertApp2.php on line 40 


Warning: SoapClient::SoapClient() [soapclient.soapclient]: failed to 
create an SSL handle in C:\xampp\htdocs\CertApp2.php on line 40 


Warning: SoapClient::SoapClient() [soapclient.soapclient]: Failed to 
enable crypto in C:\xampp\htdocs\CertApp2.php on line 40 


Warning: SoapClient::SoapClient(https://192.168.51.212/test.asmx?wsdl) 
[soapclient.soapclient]: failed to open stream: operation failed in C: 
\xampp\htdocs\CertApp2.php on line 40 


Warning: SoapClient::SoapClient() [soapclient.soapclient]: I/O 
warning : failed to load external entity "https://192.168.51.199/ 
MGACalls.asmx?wsdl" in C:\xampp\htdocs\CertApp2.php on line 40 
Caught exception: SOAP-ERROR: Parsing WSDL: Couldn't load from 
'https://192.168.51.212/test.asmx?wsdl' : failed to load external 
entity "https://192.168.51.212/test.asmx?wsdl" 
Fatal error: Call to a member function __getFunctions() on a non- 
object in C:\xampp\htdocs\CertApp2.php on line 51