An optional message to be displayed on the Invoice Payment client area screen informing of a manual review before the invoice is marked paid.");
}
function ccavenue_link($params)
{
$Merchant_Id = $params['merchantid'];
$Amount = sprintf("%.2f", $params['amount']);
$Order_Id = $params['invoiceid'] . '_' . date('YmdHis');
$Redirect_Url = $params['systemurl'] . "/modules/gateways/callback/ccavenue.php";
$WorkingKey = $params['workingkey'];
$Checksum = ccavenue_getCheckSum($Merchant_Id, $Amount, $Order_Id, $Redirect_Url, $WorkingKey);
$strRet = "";
$strRet .= "
" . $params['infomsg'];
return $strRet;
}
function ccavenue_getchecksum($MerchantId, $Amount, $OrderId, $URL, $WorkingKey)
{
$str = $MerchantId . "|" . $OrderId . "|" . $Amount . "|" . $URL . "|" . $WorkingKey;
$adler = 1;
$adler = ccavenue_adler32($adler, $str);
return $adler;
}
function ccavenue_adler32($adler, $str)
{
$BASE = 65521;
$s1 = $adler & 65535;
$s2 = $adler >> 16 & 65535;
for( $i = 0; $i < strlen($str); $i++ )
{
$s1 = ($s1 + Ord($str[$i])) % $BASE;
$s2 = ($s2 + $s1) % $BASE;
}
return ccavenue_leftshift($s2, 16) + $s1;
}
function ccavenue_leftshift($str, $num)
{
$str = DecBin($str);
for( $i = 0; $i < 64 - strlen($str); $i++ )
{
$str = '0' . $str;
}
for( $i = 0; $i < $num; $i++ )
{
$str = $str . '0';
$str = substr($str, 1);
}
return ccavenue_cdec($str);
}
function ccavenue_cdec($num)
{
for( $n = 0; $n < strlen($num); $n++ )
{
$temp = $num[$n];
$dec = $dec + $temp * pow(2, strlen($num) - $n - 1);
}
return $dec;
}