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Registered: ‎05-04-2011
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PHP 4.4.9 without MHASH available . . .

Sorry, newbie question, but attempting to use SIM with a custom php shopping cart --  don't have MHASH on the server, and using PHP 4.4.9 . . . how does the fingerprint thing work without it?

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Solution
Accepted by topic author metazai
‎08-21-2015 01:58 AM
Member
Posts: 4
Registered: ‎05-05-2011

Re: PHP 4.4.9 without MHASH available . . .

Sorry, I should have removed the bin2hex() function, you no longer need it :)

Replace:

$fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey));

With:

 $fingerprint = mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey);

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Member
Posts: 4
Registered: ‎05-05-2011

Re: PHP 4.4.9 without MHASH available . . .

You can use the following code snippet to create the mhash() function which basically does the same thing as the mhash library:

 

if (!function_exists('mhash'))
{
    if (!defined('MHASH_MD5')) define('MHASH_MD5', 1);
    
    function mhash($hash, $data, $key)
    {
        if ($hash == MHASH_MD5)
        {
            // RFC 2104 HMAC implementation for php.
            // Creates an md5 HMAC.
            // Eliminates the need to install mhash to compute a HMAC
            // Hacked by Lance Rushing

            $b = 64; // byte length for md5
            if (strlen($key) > $b) {
                $key = pack("H*",md5($key));
            }
            $key  = str_pad($key, $b, chr(0x00));
            $ipad = str_pad('', $b, chr(0x36));
            $opad = str_pad('', $b, chr(0x5c));
            $k_ipad = $key ^ $ipad ;
            $k_opad = $key ^ $opad;

            return md5($k_opad  . pack("H*",md5($k_ipad . $data)));
        }
    }
}

Member
Posts: 3
Registered: ‎05-04-2011

Re: PHP 4.4.9 without MHASH available . . .

Many, many thanks.  I am, however, running into a 99 error now, I've been changing variables left and right but to no avail.  Any thoughts?  Code below:

 

<?php
   
// the parameters for the payment can be configured here
// the API Login ID and Transaction Key must be replaced with valid values
$loginID        = "developer test login ID";
$transactionKey = "developer testtransaction Key";

//$proc_final_total is an XX.XX formatted number determined earlier on the page.

$amount         = $proc_final_total;
$description     = "Sample Transaction";
$label             = "Submit Payment"; // The is the label on the 'submit' button
$testMode        = "false";
$url            = "https://test.authorize.net/gateway/transact.dll";

// If an amount or description were posted to this page, the defaults are overidden
if (array_key_exists("amount",$_REQUEST))
    { $amount = $_REQUEST["amount"]; }
if (array_key_exists("amount",$_REQUEST))
    { $description = $_REQUEST["description"]; }

// an invoice is generated using the date and time
$invoice    = date(YmdHis);
// a sequence number is randomly generated
$sequence    = rand(1, 1000);
// a timestamp is generated
$timeStamp    = time();


if (!function_exists('mhash'))
{
    if (!defined('MHASH_MD5')) define('MHASH_MD5', 1);
    
    function mhash($hash, $data, $key)
    {
        if ($hash == MHASH_MD5)
        {
            // RFC 2104 HMAC implementation for php.
            // Creates an md5 HMAC.
            // Eliminates the need to install mhash to compute a HMAC
            // Hacked by Lance Rushing

            $b = 64; // byte length for md5
            if (strlen($key) > $b) {
                $key = pack("H*",md5($key));
            }
            $key  = str_pad($key, $b, chr(0x00));
            $ipad = str_pad('', $b, chr(0x36));
            $opad = str_pad('', $b, chr(0x5c));
            $k_ipad = $key ^ $ipad ;
            $k_opad = $key ^ $opad;

            return md5($k_opad  . pack("H*",md5($k_ipad . $data)));
        }
    }
}
 $fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey));
?>
<form method='post' action='<?php echo $url; ?>' >
<!--  Additional fields can be added here as outlined in the SIM integration
 guide at: http://developer.authorize.net -->
    <input type='hidden' name='x_login' value='<?php echo $loginID; ?>' />
    <input type='hidden' name='x_amount' value='<?php echo $amount; ?>' />
    <input type='hidden' name='x_description' value='<?php echo $description; ?>' />
    <input type='hidden' name='x_invoice_num' value='<?php echo $invoice; ?>' />
    <input type='hidden' name='x_fp_sequence' value='<?php echo $sequence; ?>' />
    <input type='hidden' name='x_fp_timestamp' value='<?php echo $timeStamp; ?>' />
    <input type='hidden' name='x_fp_hash' value='<?php echo $fingerprint; ?>' />
    <input type='hidden' name='x_test_request' value='<?php echo $testMode; ?>' />
    <input type='hidden' name='x_show_form' value='PAYMENT_FORM' />
    <input type='submit' value='<?php echo $label; ?>' />
</form>

Solution
Accepted by topic author metazai
‎08-21-2015 01:58 AM
Member
Posts: 4
Registered: ‎05-05-2011

Re: PHP 4.4.9 without MHASH available . . .

Sorry, I should have removed the bin2hex() function, you no longer need it :)

Replace:

$fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey));

With:

 $fingerprint = mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey);

Member
Posts: 3
Registered: ‎05-04-2011

Re: PHP 4.4.9 without MHASH available . . .