152 lines
4.5 KiB
PHP
152 lines
4.5 KiB
PHP
<?php
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/**
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* Name: Secure Mail
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* Description: Send notification mail encrypted with user-defined public GPG key
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* Version: 2.0
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* Author: Fabio Comuni <http://kirgroup.com/profile/fabrixxm>
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*/
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use Friendica\Addon\securemail\SecureTestEmail;
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use Friendica\App;
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use Friendica\Core\Hook;
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use Friendica\Core\Logger;
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use Friendica\Core\Renderer;
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use Friendica\DI;
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use Friendica\Object\EMail\IEmail;
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require_once __DIR__ . '/vendor/autoload.php';
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function securemail_install()
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{
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Hook::register('addon_settings', 'addon/securemail/securemail.php', 'securemail_settings');
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Hook::register('addon_settings_post', 'addon/securemail/securemail.php', 'securemail_settings_post', 10);
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Hook::register('emailer_send_prepare', 'addon/securemail/securemail.php', 'securemail_emailer_send_prepare', 10);
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Logger::notice('installed securemail');
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}
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/**
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* @brief Build user settings form
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*
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* @link https://github.com/friendica/friendica/blob/develop/doc/Addons.md#addon_settings 'addon_settings' hook
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*
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* @param App $a App instance
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* @param string $s output html
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*
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* @see App
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*/
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function securemail_settings(App &$a, array &$data)
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{
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if (!DI::userSession()->getLocalUserId()) {
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return;
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}
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$enabled = intval(DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'securemail', 'enable'));
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$publickey = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'securemail', 'pkey');
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$t = Renderer::getMarkupTemplate('settings.tpl', 'addon/securemail/');
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$html = Renderer::replaceMacros($t, [
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'$enabled' => ['securemail-enable', DI::l10n()->t('Enable Secure Mail'), $enabled],
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'$publickey' => ['securemail-pkey', DI::l10n()->t('Public key'), $publickey, DI::l10n()->t('Your public PGP key, ascii armored format')]
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]);
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$data = [
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'addon' => 'securemail',
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'title' => DI::l10n()->t('"Secure Mail" Settings'),
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'html' => $html,
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'submit' => [
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'securemail-submit' => DI::l10n()->t('Save Settings'),
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'securemail-test' => DI::l10n()->t('Save and send test'),
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],
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];
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}
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/**
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* @brief Handle data from user settings form
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*
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* @link https://github.com/friendica/friendica/blob/develop/doc/Addons.md#addon_settings_post 'addon_settings_post' hook
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*
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* @param App $a App instance
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* @param array $b hook data
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*
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* @see App
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*/
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function securemail_settings_post(App &$a, array &$b)
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{
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if (!DI::userSession()->getLocalUserId()) {
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return;
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}
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if (!empty($_POST['securemail-submit']) || !empty($_POST['securemail-test'])) {
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'securemail', 'pkey', trim($_POST['securemail-pkey']));
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$enable = (!empty($_POST['securemail-enable']) ? 1 : 0);
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'securemail', 'enable', $enable);
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if (!empty($_POST['securemail-test'])) {
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$res = DI::emailer()->send(new SecureTestEmail(DI::app(), DI::config(), DI::pConfig(), DI::baseUrl()));
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// revert to saved value
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DI::pConfig()->set(DI::userSession()->getLocalUserId(), 'securemail', 'enable', $enable);
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if ($res) {
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DI::sysmsg()->addInfo(DI::l10n()->t('Test email sent'));
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} else {
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DI::sysmsg()->addNotice(DI::l10n()->t('There was an error sending the test email'));
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}
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}
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}
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}
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/**
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* @brief Encrypt notification emails text
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*
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* @link https://github.com/friendica/friendica/blob/develop/doc/Addons.md#emailer_send_prepare 'emailer_send_prepare' hook
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*
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* @param App $a App instance
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* @param IEmail $email Email
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*
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* @see App
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*/
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function securemail_emailer_send_prepare(App &$a, IEmail &$email)
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{
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if (empty($email->getRecipientUid())) {
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return;
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}
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$uid = $email->getRecipientUid();
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$enable_checked = DI::pConfig()->get($uid, 'securemail', 'enable');
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if (!$enable_checked) {
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DI::logger()->debug('No securemail enabled.');
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return;
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}
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$public_key_ascii = DI::pConfig()->get($uid, 'securemail', 'pkey');
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preg_match('/-----BEGIN ([A-Za-z ]+)-----/', $public_key_ascii, $matches);
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$marker = empty($matches[1]) ? 'MESSAGE' : $matches[1];
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$public_key = OpenPGP::unarmor($public_key_ascii, $marker);
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$key = OpenPGP_Message::parse($public_key);
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$data = new OpenPGP_LiteralDataPacket($email->getMessage(true), [
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'format' => 'u',
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'filename' => 'encrypted.gpg'
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]);
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try {
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$encrypted = OpenPGP_Crypt_Symmetric::encrypt($key, new OpenPGP_Message([$data]));
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$armored_encrypted = wordwrap(
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OpenPGP::enarmor($encrypted->to_bytes(), 'PGP MESSAGE'),
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64,
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"\n",
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true
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);
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$email = $email->withMessage($armored_encrypted, null);
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} catch (Exception $e) {
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DI::logger()->warning('Encryption failed.', ['email' => $email, 'exception' => $e]);
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}
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}
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