Question

I need help for my PHP script. I need to post certain fields like invoiceid, firstname, email, etc in encrypted way. The formula for the checksum is

sha512 (key|txnid|amount|productinfo|firstname|email|udf1|udf2|udf3|udf4|udf5||||||<SALT>)

I need to post the above variables via sha512. I am unable to do this. Please help with this. Im a learner and I am not good at PHP.

Here is the code. Im still getting checksum error.

<?php
function xxx_config() {

    $configarray = array(
     "FriendlyName" => array("Type" => "System", "Value"=>"XXX"),
     "alias" => array("FriendlyName" => "Merchant ID", "Type" => "text", "Size" => "20", ),
     "salt" => array("FriendlyName" => "SALT", "Type" => "text", "Size" => "20",),
     "mode" => array("FriendlyName" => "MODE", "Type" => "text", "Description" => "TEST or LIVE", ),

    );
    return $configarray;
}

function xxx_link($params) {


    # Gateway Specific Variables
    $key = $params['alias'];
    $gatewaymode = $params['mode'];
    $salt = $params['salt'];


    # Invoice Variables
    $txnid = $params['invoiceid'];
    $productinfo = $params["description"];
    $amount = $params['amount']; # Format: ##.##
    $currency = $params['currency']; # Currency Code

    # Client Variables
    $firstname = $params['clientdetails']['firstname'];
    $lastname = $params['clientdetails']['lastname'];
    $email = $params['clientdetails']['email'];
    $address1 = $params['clientdetails']['address1'];
    $address2 = $params['clientdetails']['address2'];
    $city = $params['clientdetails']['city'];
    $state = $params['clientdetails']['state'];
    $postcode = $params['clientdetails']['postcode'];
    $country = $params['clientdetails']['country'];
    $phone = $params['clientdetails']['phonenumber'];

    # System Variables
    $companyname = 'XXX';
    $systemurl = $params['systemurl'];
    $currency = $params['currency'];

        # Enter your code submit to the gateway...

$hashdata = ($key."|".$txnid."|".$amount."|".$productinfo."|".$firstname."|".$email."|"."|"."|"."|"."|"."|".$salt);

   $hash = hash("sha512", $hashdata);

$code = '<form method="post" action="https://secure.xxx.xxx" name="frmTransaction" id="frmTransaction" onSubmit="return validate()">
<input type="hidden" name="key" value="'.$key.'" />
<input type="hidden" name="mode" value="'.$gatewaymode.'" />
<input type="hidden" name="productinfo" value="'.$productinfo.'" />
<input type="hidden" name="txnid" value="'.$txnid.'" />
<input type="hidden" name="salt" value="'.$salt.'" />
<input type="hidden" name="name" value="'.$firstname.'" />
<input type="hidden" name="address" value="'.$address1.'" />
<input type="hidden" name="city" value="'.$city.'" />
<input type="hidden" name="state" value="'.$state.'" />
<input type="hidden" name="country" value="'.$country.'" />
<input type="hidden" name="postal_code" value="'.$postcode.'" />
<input type="hidden" name="ship_name" value="'.$firstname.'" />
<input type="hidden" name="ship_address" value="'.$address1.'" />
<input type="hidden" name="ship_city" value="'.$city.'" />
<input type="hidden" name="ship_state" value="'.$state.'" />
<input type="hidden" name="ship_country" value="'.$country.'" />
<input type="hidden" name="ship_postal_code" value="'.$postcode.'" />
<input type="hidden" name="ship_phone" value="'.$phone.'" />
<input type="hidden" name="email" value="'.$email.'" />
<input type="hidden" name="phone" value="'.$phone.'" />
<input type="hidden" name="amount" value="'.$amount.'" />
<input type="hidden" name="surl" value="https://xxx.xx/xxxx.php" />
<input type="hidden" name="furl" value="https://xxx.xx/xxx.php" />
<input type="hidden" name="Hash" value="'.$hash.'"/>
<input type="submit" value="Pay Now" />
</form>';

return $code;

}
?>

Answer 1

the hash() function is what you are looking for. To create an sha512 hash call it as follows:

hash('sha512', "the value to hash");

to see what Hash-Algorithms else you could use take a look at the hash_algos() function