Moodle 3.x Developer's Guide

Decrypting data in PHP

The sample code at https://github.com/iandavidwild/moodle-local_certificateapi includes an example PHP client (check out the /client folder). This will require a means to connect to our new external API (using curl) and also a method to decrypt the data. Again, we can use the PHP OpenSSL extension for decryption:

function decrypt($response) {       $output = false;       if(count($response) == 2)       {             // response should have 'data' and an 'envelope'             if(isset($response['data']) &&             isset($response['envelope'])) {             $data = base64_decode($response['data']);             $envelope = base64_decode($response['envelope']);             // load private key from file             static $certificateapi_key= null;             if ($certificateapi_key === null)             {  $certificateapi_key= ...