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Directory : /var/www/html/shardahospital_old.org/application/helpers/
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| Current File : /var/www/html/shardahospital_old.org/application/helpers/checksum.php |
<?php
function getCheckSum($MerchantId,$Amount,$OrderId ,$URL,$WorkingKey)
{
$str ="$MerchantId|$OrderId|$Amount|$URL|$WorkingKey";
$adler = 1;
$adler = adler32($adler,$str);
return $adler;
}
function verifyCheckSum($MerchantId,$OrderId,$Amount,$AuthDesc,$CheckSum,$WorkingKey)
{
$str = "$MerchantId|$OrderId|$Amount|$AuthDesc|$WorkingKey";
$adler = 1;
$adler = adler32($adler,$str);
if($adler == $CheckSum)
return "true" ;
else
return "false" ;
}
function adler32($adler , $str)
{
$BASE = 65521 ;
$s1 = $adler & 0xffff ;
$s2 = ($adler >> 16) & 0xffff;
for($i = 0 ; $i < strlen($str) ; $i++)
{
$s1 = ($s1 + Ord($str[$i])) % $BASE ;
$s2 = ($s2 + $s1) % $BASE ;
//echo "s1 : $s1 <BR> s2 : $s2 <BR>";
}
return leftshift($s2 , 16) + $s1;
}
function leftshift($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 ) ;
//echo "str : $str <BR>";
}
return cdec($str) ;
}
function cdec($num)
{
for ($n = 0 ; $n < strlen($num) ; $n++)
{
$temp = $num[$n] ;
$dec = $dec + $temp*pow(2 , strlen($num) - $n - 1);
}
return $dec;
}
?>
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