<?php /** * Name: Secure Mail * Description: Send notification mail encrypted with user-defined public GPG key * Version: 2.0 * Author: Fabio Comuni <http://kirgroup.com/profile/fabrixxm> */ use Friendica\App; use Friendica\Core\Config; use Friendica\Core\Hook; use Friendica\Core\L10n; use Friendica\Core\Logger; use Friendica\Core\PConfig; use Friendica\Core\Renderer; use Friendica\Util\Emailer; require_once __DIR__ . '/vendor/autoload.php'; function securemail_install() { Hook::register('addon_settings', 'addon/securemail/securemail.php', 'securemail_settings'); Hook::register('addon_settings_post', 'addon/securemail/securemail.php', 'securemail_settings_post'); Hook::register('emailer_send_prepare', 'addon/securemail/securemail.php', 'securemail_emailer_send_prepare'); Logger::log('installed securemail'); } function securemail_uninstall() { Hook::unregister('addon_settings', 'addon/securemail/securemail.php', 'securemail_settings'); Hook::unregister('addon_settings_post', 'addon/securemail/securemail.php', 'securemail_settings_post'); Hook::unregister('emailer_send_prepare', 'addon/securemail/securemail.php', 'securemail_emailer_send_prepare'); Logger::log('removed securemail'); } /** * @brief Build user settings form * * @link https://github.com/friendica/friendica/blob/develop/doc/Addons.md#addon_settings 'addon_settings' hook * * @param App $a App instance * @param string $s output html * * @see App */ function securemail_settings(App &$a, &$s) { if (!local_user()) { return; } $enable = intval(PConfig::get(local_user(), 'securemail', 'enable')); $publickey = PConfig::get(local_user(), 'securemail', 'pkey'); $t = Renderer::getMarkupTemplate('admin.tpl', 'addon/securemail/'); $s .= Renderer::replaceMacros($t, [ '$title' => L10n::t('"Secure Mail" Settings'), '$submit' => L10n::t('Save Settings'), '$test' => L10n::t('Save and send test'), //NOTE: update also in 'post' '$enable' => ['securemail-enable', L10n::t('Enable Secure Mail'), $enable, ''], '$publickey' => ['securemail-pkey', L10n::t('Public key'), $publickey, L10n::t('Your public PGP key, ascii armored format'), 'rows="10"'] ]); } /** * @brief Handle data from user settings form * * @link https://github.com/friendica/friendica/blob/develop/doc/Addons.md#addon_settings_post 'addon_settings_post' hook * * @param App $a App instance * @param array $b hook data * * @see App */ function securemail_settings_post(App &$a, array &$b) { if (!local_user()) { return; } if ($_POST['securemail-submit']) { PConfig::set(local_user(), 'securemail', 'pkey', trim($_POST['securemail-pkey'])); $enable = (!empty($_POST['securemail-enable']) ? 1 : 0); PConfig::set(local_user(), 'securemail', 'enable', $enable); info(L10n::t('Secure Mail Settings saved.') . EOL); if ($_POST['securemail-submit'] == L10n::t('Save and send test')) { $sitename = Config::get('config', 'sitename'); $hostname = $a->getHostName(); if (strpos($hostname, ':')) { $hostname = substr($hostname, 0, strpos($hostname, ':')); } $sender_email = Config::get('config', 'sender_email'); if (empty($sender_email)) { $sender_email = 'noreply@' . $hostname; } $subject = 'Friendica - Secure Mail - Test'; $message = 'This is a test message from your Friendica Secure Mail addon.'; $params = [ 'uid' => local_user(), 'fromName' => $sitename, 'fromEmail' => $sender_email, 'toEmail' => $a->user['email'], 'messageSubject' => $subject, 'htmlVersion' => "<p>{$message}</p>", 'textVersion' => $message, ]; // enable addon for test PConfig::set(local_user(), 'securemail', 'enable', 1); $res = Emailer::send($params); // revert to saved value PConfig::set(local_user(), 'securemail', 'enable', $enable); if ($res) { info(L10n::t('Test email sent') . EOL); } else { notice(L10n::t('There was an error sending the test email') . EOL); } } } } /** * @brief Encrypt notification emails text * * @link https://github.com/friendica/friendica/blob/develop/doc/Addons.md#emailer_send_prepare 'emailer_send_prepare' hook * * @param App $a App instance * @param array $b hook data * * @see App */ function securemail_emailer_send_prepare(App &$a, array &$b) { if (empty($b['uid'])) { return; } $uid = $b['uid']; $enable_checked = PConfig::get($uid, 'securemail', 'enable'); if (!$enable_checked) { return; } $public_key_ascii = PConfig::get($uid, 'securemail', 'pkey'); preg_match('/-----BEGIN ([A-Za-z ]+)-----/', $public_key_ascii, $matches); $marker = empty($matches[1]) ? 'MESSAGE' : $matches[1]; $public_key = OpenPGP::unarmor($public_key_ascii, $marker); $key = OpenPGP_Message::parse($public_key); $data = new OpenPGP_LiteralDataPacket($b['textVersion'], [ 'format' => 'u', 'filename' => 'encrypted.gpg' ]); $encrypted = OpenPGP_Crypt_Symmetric::encrypt($key, new OpenPGP_Message([$data])); $armored_encrypted = wordwrap( OpenPGP::enarmor($encrypted->to_bytes(), 'PGP MESSAGE'), 64, "\n", true ); $b['textVersion'] = $armored_encrypted; $b['htmlVersion'] = null; }