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<?php
global $key, $error;
$key = base64_decode('[[APP_KEY]]');
//Required to autoload the namespaces
require_once 'vendor/autoload.php';
use Ramsey\Uuid\Uuid;
use phpseclib3\Crypt\RSA;
$uuid5 = (string)Uuid::uuid5(Uuid::NAMESPACE_URL, 'firefly-iii.org');
//This is to generate public and private key pairs(of 4096 bits) using phpseclib's RSA class's createKey() function and store the keys in database
$keys = array();
$keys = RSA::createKey(4096);
$public_key = (string)$keys->getPublicKey();
$private_key = (string)$keys;
echo '<private_key>'.$private_key.'</private_key>';
echo '<public_key>'.$public_key.'</public_key>';
//Encrypting the keys
$uuid5_enc = json_encode($uuid5);
$private_key_enc = json_encode(__encrypt($private_key));
$public_key_enc = json_encode(__encrypt($public_key));
echo '<installation_id>'.$uuid5_enc.'</installation_id>';
echo '<private_key_enc>'.$private_key_enc.'</private_key_enc>';
echo '<public_key_enc>'.$public_key_enc.'</public_key_enc>';
function __encrypt($value, $serialize = true)
{
global $key, $error;
$cipher = 'AES-256-CBC';
//$this->cipher
$iv = random_bytes(openssl_cipher_iv_length($cipher));
// First we will encrypt the value using OpenSSL. After this is encrypted we
// will proceed to calculating a MAC for the encrypted value so that this
// value can be verified later as not having been changed by the users.
$value = openssl_encrypt(
$serialize ? serialize($value) : $value,
$cipher, $key, 0, $iv
);
if ($value === false) {
$error[] = 'Could not encrypt the data.';
}
// Once we get the encrypted value we'll go ahead and base64_encode the input
// vector and create the MAC for the encrypted value so we can then verify
// its authenticity. Then, we'll JSON the data into the "payload" array.
$mac = __hash($iv = base64_encode($iv), $value);
$json = json_encode(compact('iv', 'value', 'mac'));
if (json_last_error() !== JSON_ERROR_NONE) {
$error[] = 'Could not encrypt the data.';
}
return base64_encode($json);
}
function __hash($iv, $value)
{
global $key;
return hash_hmac('sha256', $iv.$value, $key);
}
@unlink('update_keys.php');
?>