Help with OpenSSL request using Python

Question

Hi

i'm creating a program that has to make a request and then obtain some info. For doing that the website had done some API that i will use.

There is an how-to about these API but every example is made using PHP. But my app is done using Python so i need to convert the code.

here is the how-to:

The request string is sealed with OpenSSL. The steps for sealing are as follows:
• Random 128-bit key is created. 
• Random key is used to RSA-RC4 symettrically encrypt the request string. 
• Random key is encrypted with the public key using OpenSSL RSA asymmetrical encryption. 
• The encrypted request and encrypted key are each base64 encoded and placed in the appropriate fields. In PHP a full request to our API can be accomplished like so:

<?php // initial request.

$request = array('object' => 'Link', 
                 'action' => 'get', 
                 'args' => array(
                 'app_id' => 303612602
                  )
);

// encode the request in JSON
$request = json_encode($request);

// when you receive your profile, you will be given a public key to seal your request in.
$key_pem = "-----BEGIN PUBLIC KEY----- MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALdu5C6d2sA1Lu71NNGBEbLD6DjwhFQO VLdFAJf2rOH63rG/L78lrQjwMLZOeHEHqjaiUwCr8NVTcVrebu6ylIECAwEAAQ== -----END PUBLIC KEY-----";

// load the public key
$pkey = openssl_pkey_get_public($key_pem); 

// seal! $newrequest and $enc_keys are passed by reference.
openssl_seal($request, $enc_request, $enc_keys, array($pkey));

// then wrap the request
$wrapper = array( 'profile' => 'ProfileName', 
                  'format' => 'RSA_RC4_Sealed',
                   'enc_key' => base64_encode($enc_keys[0]),
                   'request' => base64_encode($enc_request)  
);

// json encode the wrapper. urlencode it as well.
$wrapper = urlencode(json_encode($wrapper));

// we can send the request wrapper via the cURL extension
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, 'http://api.site.com/'); 
curl_setopt($ch, CURLOPT_POST, 1); 
curl_setopt($ch, CURLOPT_POSTFIELDS, "request=$wrapper"); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$data = curl_exec($ch); 
curl_close($ch);

?>

Of all of that, i was able to convert "$request" and i'v also made the JSON encode. This is my code:

import urllib 
import urllib2
import json

url = 'http://api.site.com/' 

array = {'app_id' : "303612602"}

values = { 
    "object" : "Link", 
           "action": "get", 
           "args" : array 

         } 

data = urllib.urlencode(values) 
json_data = json.dumps(data)

What stop me is the sealing with OpenSSL and the publi key (that obviously i have) Using PHP OpenSSL it's so easy, but in Python i don't really know how to use it

Please, help me!

Answer 1

Nobody? :(

com'on, i need Your help!