<?php
/**
 * SoapClient extended to ease the authentication with the Omniture web services.
 * Get WSDL file & username/shared secret from your company Admin area at http://my.omniture.com/
 * 
 * Author: henrik at schack.dk
 */
class OmnitureSoapClient extends SoapClient {

	private $username;
	private $secret;
	
	function __construct($wsdl, $username, $secret, $options=array()) {		
		$this->username=$username;
		$this->secret=$secret;	
		parent::SoapClient($wsdl,$options);
	}		

	private function getWSSecurityHeader() {
		// Some auto incrementing value in a database would 
		// probably be a better choice than a microtime call.
		$nonce = hash_hmac('sha1',microtime(),$this->secret);
		$created = date("Y-m-d H:i:s");
		$sha1_string = sha1($nonce . $created . $this->secret);
		$password = base64_encode($sha1_string);
		$authheader = new SoapVar('
		<wsse:Security SOAP-ENV:mustUnderstand="1">
		  <wsse:UsernameToken wsu:Id="User">
		  <wsse:Username>'.$this->username.'</wsse:Username>
		  <wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordDigest">'.$password.'</wsse:Password>
		  <wsse:Nonce>'.$nonce.'</wsse:Nonce>
		  <wsu:Created>'.$created.'</wsu:Created>
		  </wsse:UsernameToken>
		</wsse:Security>',XSD_ANYXML);
		return new SoapHeader('http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd','Security',$authheader);
	}

	public function __call($function_name, $arguments) {
		$this->__setSoapHeaders($this->getWSSecurityHeader());
		return parent::__Call($function_name, $arguments);
	}
	
	public function __soapCall ($function_name, $arguments, $options = null, $input_headers = null, &$output_headers = null) {
		$this->__setSoapHeaders($this->getWSSecurityHeader());
		return parent::__soapCall($function_name, $arguments, $options, $input_headers, $output_headers);
	}	
}
?>