Amadeus e-Power Web Service - issues setting SOAP auth headers

I'm having issues setting AuthenticationSoapHeader for Amadeus e-Power services. I'm using PHP's built in SoapClient.

WSDL: https://staging-ws.epower.amadeus.com/ws_usitcolours/EpowerService.asmx?WSDL

Basic class I've made to test things out:

class AmadeusSoapClient
{
    private $_client;
    private $_config = [
        'wsdl' => 'https://staging-ws.epower.amadeus.com/ws_usitcolours/EpowerService.asmx?WSDL',
        'namespace' => 'https://epowerv5.amadeus.com.tr/WS', 
        'auth' => [
            'username' => '...',
            'password' => '...'
        ], 
        'debug' => true
    ];

    // Construct
    public function __construct()
    {   
        // Client
        $this->_client = new \SoapClient($this->_config['wsdl'], [
            'trace' => $this->_config['debug']
        ]); 

        // Headers
        $headers = [ 
            // Auth
            new \SoapHeader($this->_config['namespace'], 'AuthenticationSoapHeader', [
                'WSUserName' => $this->_config['auth']['username'], 
                'WSPassword' => $this->_config['auth']['password']
            ]),     
        ]; 

        // Set headers 
        $this->_client->__setSoapHeaders($headers);
    }  

    // Request: CurrencyConversion
    public function currencyConversion($fromCurrency = 'BGN', $toCurrency = 'EUR', $amount = 1.00)
    { 
        $method = 'CurrencyConversion';
        $params = [
            'OTA_CurrencyConversionRQ' => [
                '_' => '',
                'FromCurrency' => $fromCurrency,
                'ToCurrency' => $toCurrency,
                'Amount' => $amount,
            ], 
        ];

        try { 
            return $this->_client->__call($method, [$params]);  
        } catch (\Exception $e) {
            // ...
        }  
    } 
}

Sample usage:

$client = new \AmadeusSoapClient();
$client->currencyConversion(); 

Error received:

stdClass Object
(
    [OTA_CurrencyConversionRS] => stdClass Object
        (
            [Errors] => stdClass Object
                (
                    [Error] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [_] => 
                                    [Type] => EpowerInternalError
                                    [ErrorCode] => EPW.0000
                                    [ShortText] => User Name is required
                                    [Code] => A001
                                    [NodeList] => EPower
                                    [BreakFlow] => 
                                )

                            [1] => stdClass Object
                                (
                                    [_] => 
                                    [Type] => EpowerInternalError
                                    [ErrorCode] => EPW.0000
                                    [ShortText] => Password is required
                                    [Code] => A001
                                    [NodeList] => EPower
                                    [BreakFlow] => 
                                )
                        )
                )
        )
)

No matter if I set headers with __setSopHeaders or pass them with the __call method, they are always ignored.. any other ideas how to set them?

Requests for methods that do not require Authentication are working properly.

Interesting thing is that the same request is working with Postman, but not with PHP SoapClient or SoapUI.

The problem was in the SSL communication between PHP's built in SoapClient and Amadeus's .NET server. Somehow the SSL connection could not be established, no matter how I set (force) Soap to use SSL I have always received the https connection must be used error.

Sadly, I did not have more free time to investigate further and I decided to switch to cURL. Here is the simple class I made. Hope it helps someone!

class AmadeusClient
{
    private $_config = [
        'wsdl' => 'https://staging-ws.epower.amadeus.com/ws_usitcolours/EpowerService.asmx?WSDL',
        'namespace' => 'http://epowerv5.amadeus.com.tr/WS',
        'auth' => [
            'username' => '...',
            'password' => '...'
        ],
        'sessionCookieName' => 'ASP.NET_SessionId',
        'debug' => true
    ];

    public function testCall()
    {
        $fromCurrency = 'BGN';
        $toCurrency = 'USD';        
        $amount = 15.00;
        $result = $this->currencyConversionRequest($fromCurrency, $toCurrency, $amount);
        echo '<pre>';
        var_dump($result);
        exit; 
    }

    // Request: Currency conversion
    public function currencyConversionRequest($fromCurrency = 'BGN', $toCurrency = 'EUR', $amount = 1.00)
    {
        $method = 'CurrencyConversion';
        $params = [
            'OTA_CurrencyConversionRQ' => [
                '_attributes' => [
                    'FromCurrency' => $fromCurrency,
                    'ToCurrency' => $toCurrency,
                    'Amount' => $amount,
                ]
            ],
        ];

        $result = $this->sendRequest($method, $params);
        if (isset($result->Body->CurrencyConversionResponse->OTA_CurrencyConversionRS->Success)) {
            $array = (array) $result->Body->CurrencyConversionResponse->OTA_CurrencyConversionRS->attributes();
            if (!empty($array['@attributes'])) {
                return $array['@attributes'];
            }
        }
        return false;
    } 

    public function sendRequest($method, $params)
    {
        $body = \Helpers\ArrayToXml::convert($params, [
            'rootElementName' => $method,
            '_attributes' => [
                'xmlns' => $this->_config['namespace']
            ]
        ]);
        $requestBody = '
            <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:Header>
                    <AuthenticationSoapHeader xmlns="'. $this->_config['namespace'] .'">
                        <WSUserName>'. $this->_config['auth']['username'] .'</WSUserName>
                        <WSPassword>'. $this->_config['auth']['password'] .'</WSPassword>
                    </AuthenticationSoapHeader>
                </soap:Header>
                <soap:Body>
                    '. str_replace('<?xml version="1.0"?>', '', $body) .'
                </soap:Body>
            </soap:Envelope>
        '; 

        $headers = [
            'Content-type: text/xml; charset=utf-8',
            'Accept: text/xml',
            'Cache-Control: no-cache',
            'Pragma: no-cache',
            'SOAPAction: '. $this->_config['namespace'] .'/'. $method,
            'Content-length: '. mb_strlen($requestBody),
        ];
        $ch = curl_init($this->_config['wsdl']);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $requestBody);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_VERBOSE, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        $output = curl_exec($ch);
        curl_close($ch);

        $cleanXml = str_ireplace(['SOAP-ENV:', 'SOAP:'], '', $output);
        return simplexml_load_string($cleanXml);
    }
}

As of \Helpers\ArrayToXml, it is just a simple class by Spatie that converts PHP Array to XML. Source: https://github.com/spatie/array-to-xml

Request XML generated by the above class:

<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:Header>
        <AuthenticationSoapHeader xmlns="http://epowerv5.amadeus.com.tr/WS">
            <WSUserName>...</WSUserName>
            <WSPassword>...</WSPassword>
        </AuthenticationSoapHeader>
    </soap:Header>
    <soap:Body>
        <CurrencyConversion xmlns="http://epowerv5.amadeus.com.tr/WS">
            <OTA_CurrencyConversionRQ FromCurrency="BGN" ToCurrency="USD" Amount="15"/>
        </CurrencyConversion>
    </soap:Body>
</soap:Envelope>

Response:

array(3) {
  ["Amount"]=>
  string(4) "9.00"
  ["TruncatedAmount"]=>
  string(4) "8.67"
  ["OtherChargesAmount"]=>
  string(4) "8.67"
}