Perform soap request via https with self-signed certificate by cURL

Perform soap request via https with self-signed certificate by cURL

I'm trying to perform soap request to web-service written on C# via https.
Server uses self-signed certificate.
After many failed attempts with usage of SoapClient I decided to use pure
cURL to perfrom request.
My code:
<?php
header('Content-Type: text/plain; charset=utf-8');
$url = 'https://ip:8443/ServiceName';
$admin = 'login';
$password = 'haShedPassw0rdHere';
$post =
'<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
// Soap service params xml
</soap:Body>
</soap:Envelope>';
$headers = array(
'Content-type: text/xml;charset="utf-8"',
'Accept: text/xml',
'Cache-Control: no-cache',
'Pragma: no-cache',
'SOAPAction: https://ip:8443/WebService',
'Content-length: ' . strlen($post),
);
$curl = curl_init();
$options = array(
CURLOPT_URL => $url,
CURLOPT_HTTPHEADER => $headers,
CURLOPT_HTTPAUTH => CURLAUTH_ANY,
CURLOPT_USERPWD => $admin . ':' . $password,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $post,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HEADER => false,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_ENCODING => '',
CURLOPT_AUTOREFERER => true,
CURLOPT_CONNECTTIMEOUT => 120,
CURLOPT_TIMEOUT => 120,
CURLOPT_MAXREDIRS => 10
);
curl_setopt_array($curl, $options);
var_dump($response = curl_exec($curl));
?>
Response:
string(370) "<s:Envelope
xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body><s:Fault><faultcode
xmlns:a="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">a:InvalidSecurity</faultcode><faultstring
xml:lang="ru-RU">Îøèáêà ïðè ïðîâåðêå áåçîïàñíîñòè
ñîîáùåíèÿ.</faultstring></s:Fault></s:Body></s:Envelope>"
Where:
Îøèáêà ïðè ïðîâåðêå áåçîïàñíîñòè ñîîáùåíèÿ.
Means something like:
Communication security check error.
What have I tried:
POST request with a self-signed certificate
How to consume a WCF Web Service that uses custom username validation with
a PHP page?
Php SoapClient stream_context option
SOAP authentication with PHP
How can I send SOAP XML via Curl and PHP?
And more of them.
Question: What am I doing wrong?
Regards.
P.S.: Tested with PHP 5.3, PHP 5.4.14, PHP 5.5.1. Results are same.