integration problem

documentation provided by the bank are as follows:-

Preparing and sending payment request message using HTTP
form post

<Form method=”post” action=https://hblpgw.2c2p.com/HBLPGW/Payment/Payment/Payment>
<input type=”text” id=”paymentGatewayID” name=”paymentGatewayID” value=”234”/>
<input type=”text” id=”invoiceNo” name=”invoiceNo” value=”00000001234567890333”/>
<input type=”text” id=”productDesc” name=”productDesc” value=”Test Product”/>
<input type=”text” id=”amount” name=”amount” value=”000000010000”/>
<input type=”text” id=”currencyCode” name=”currencyCode” value=”764”/>
<input type=”text” id=”userDefined1” name=”userDefined1” value=”custom data”/>
<input type=”text” id=”nonSecure” name=”nonSecure” value=”Y”/>
<input type=”text” id=”hashValue” name=”hashValue”
value=”94E8E91C29E73B9648011FADBAE19849B520B24B”/>
</Form>

5. Hashing
In order to have data integrity and to identify the correct source of the request and
response, merchant needs to send hash value together in the request and HBL
PGW returns the hash value in the response.

Hash value is computed using HMACSHA256 algorithm with merchant secret key
(provided by HBL to merchant).
HashValue = merchantID + invoiceNumber
+ amount + currencyCode + nonSecure

Sample code:

Hashing function in PHP

<?php
$signData = hash_hmac(‘SHA256′, “signatureString”,’SecretKey’, false);
$signData = strtoupper($signData);
echo urlencode($signData);
?>

email me “sus.ill.thapa@gmail.com” if u still got any problems! I’ve sucessfull integrated it few months back and its running smoothly without any errors.