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<?php
/*
* @param1 : Plain String
* @param2 : Working key provided by CCAvenue
* @return : Decrypted String
*/
// function encrypt($plainText,$key)
function encrypt($plainText,$key)
{
$key = hextobin(md5($key));
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$openMode = openssl_encrypt($plainText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);
$encryptedText = bin2hex($openMode);
return $encryptedText;
}
/*
* @param1 : Encrypted String
* @param2 : Working key provided by CCAvenue
* @return : Plain String
*/
function decrypt($encryptedText,$key)
{
$key = hextobin(md5($key));
$initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
$encryptedText = hextobin($encryptedText);
$decryptedText = openssl_decrypt($encryptedText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);
return $decryptedText;
}
function hextobin($hexString)
{
$length = strlen($hexString);
$binString="";
$count=0;
while($count<$length)
{
$subString =substr($hexString,$count,2);
$packedString = pack("H*",$subString);
if ($count==0)
{
$binString=$packedString;
}
else
{
$binString.=$packedString;
}
$count+=2;
}
return $binString;
}
?>