PHP: PHPECC

phpecc.php

<?php
$loader = new PemLoader();
$math = EccFactory::getAdapter();
$this->messages = new MessageFactory($math);

$privKeySerializer = new PemPrivateKeySerializer(new DerPrivateKeySerializer());
$pubKeySerializer = new PemPublicKeySerializer(new DerPublicKeySerializer());

$PrivateKeyPath = env('KEY_LOCATION').'my.priv';
$PublicKeyPath = storage_path().'/app/'.uniqid().'.pub';
$key = str_replace(" ", "+", Input::get('key'));
file_put_contents($PublicKeyPath, "-----BEGIN PUBLIC KEY-----\r\n". $key ."\r\n-----END PUBLIC KEY-----");

$private = $privKeySerializer->parse($loader->loadPrivateKeyData($PrivateKeyPath));
$public = $pubKeySerializer->parse($loader->loadPublicKeyData($PublicKeyPath));

$privateDh = $private->createExchange($this->messages, $public);
$key = $privateDh->calculateSharedKey();

return $key;