String(128) & String(439) ?!?!

[seansammut]

Hi,

 

I created a very simple API and when a request is invoked to the API, a public key is sent and the API encrypts the message using the public key and sends the data back. My problem is that when I use var_dump, the data received is String(439), when it is supposed to be String(128) in order to be able to decrypt the message using opensll.

 

Any ideas how to solve this problem...

 

Thanks

[mikesta707]

without seeing any code there is not much chance of being able to get answers that aren't more than guesses

[seansammut]

This is the one which makes the requests:

 

<?php

$res=openssl_pkey_new();

openssl_pkey_export($res, $privatekey);


$publickey=openssl_pkey_get_details($res);
$publickey=$publickey["key"];

$query_vals = array ('method' => 'getImage', 'public_key' => $publickey);

$request = '';
foreach($query_vals as $key => $value) {
    $request .= $key.'='.urlencode($value).'&';
}

$request = rtrim($request, '&');


$ch = curl_init("http://apihost/APImanage.php");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
$response = curl_exec($ch);
curl_close ($ch);



var_dump ($response);

/*$bool = openssl_private_decrypt($response,$result,$privatekey);
//var_dump($bool);

echo "$response";
echo "$result";*/

?>

 

This handles the requests:

 

<?php

function encryption($data)
{
   openssl_public_encrypt($data,$crypttext,$_POST['public_key']);
   return $crypttext;
}

require_once('manage.php');

$m = new manage();
    
switch ($_POST['method'])
  {	  
    case "getImage": 
		   $result = encryption($m->getImage());		  
   		   echo $result;		  		   
	  break;
	case "getLink":
	  $result = encryption($m->getLink());
	  echo "$result";
	  break;		  
}
?>

 

This returns the data requested by the above script:

 

<?php
class manage {

    function __construct() {	 
    }

    function getImage() {
        return '<img src="http://www.daveramsey.com/media/image/general/pic-car1.jpg"/>'; 
    }

function getLink()
{
  return '<a href="http://www.w3schools.com/">Visit W3Schools!</a>';
}
}
?>

[seansammut]

What is the difference between these two types of strings (the ones in the subject)?

[Alex]

Their length, apparently.

[seansammut]

Can I type cast from str(439) to str(128)?

[Alex]

No, this isn't a data type issue, they're both of type string. Just one is 128 bytes long and the other is 439 bytes long.

[seansammut]

Thing is that when I try to decrypt the data using openssl_private_decrypt, the function returns a false and the data does not decrypt. I think the reason for the problem is that the data is in String (439).......

 

[seansammut]

Any solutions?