raspap-webgui/ajax/networking/get_wgkey.php

<?php

require '../../includes/csrf.php';
require_once '../../includes/config.php';

$entity = $_POST['entity'];

if (isset($entity)) {
   
    // generate public/private key pairs for entity
    $pubkey = RASPI_WIREGUARD_PATH.$entity.'-public.key';
    $privkey = RASPI_WIREGUARD_PATH.$entity.'-private.key';
    $pubkey_tmp = '/tmp/'.$entity.'-public.key';
    $privkey_tmp = '/tmp/'.$entity.'-private.key';
     
    exec("sudo wg genkey | tee $privkey_tmp | wg pubkey > $pubkey_tmp", $return);
    $wgdata['pubkey'] = str_replace("\n",'',file_get_contents($pubkey_tmp));
    $wgdata['privkey'] = str_replace("\n",'',file_get_contents($privkey_tmp));
    exec("sudo mv $privkey_tmp $privkey", $return);
    exec("sudo mv $pubkey_tmp $pubkey", $return);

    echo json_encode($wgdata);
}