668 lines
22 KiB
PHP
668 lines
22 KiB
PHP
<?php
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/**
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* @file mod/dfrn_request.php
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* @brief Module: dfrn_request
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*
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* Purpose: Handles communication associated with the issuance of
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* friend requests.
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*
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* @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
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* You also find a graphic which describes the confirmation process at
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* https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_request.png
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*/
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use Friendica\App;
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use Friendica\Core\Config;
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use Friendica\Core\L10n;
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use Friendica\Core\Logger;
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use Friendica\Core\Protocol;
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use Friendica\Core\Renderer;
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use Friendica\Core\System;
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use Friendica\Database\DBA;
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use Friendica\Model\Contact;
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use Friendica\Model\Group;
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use Friendica\Model\Profile;
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use Friendica\Model\User;
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use Friendica\Module\Login;
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use Friendica\Network\Probe;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Network;
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use Friendica\Util\Strings;
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require_once 'include/enotify.php';
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function dfrn_request_init(App $a)
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{
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if ($a->argc > 1) {
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$which = $a->argv[1];
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}
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Profile::load($a, $which);
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return;
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}
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/**
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* Function: dfrn_request_post
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*
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* Purpose:
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* Handles multiple scenarios.
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*
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* Scenario 1:
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* Clicking 'submit' on a friend request page.
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*
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* Scenario 2:
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* Following Scenario 1, we are brought back to our home site
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* in order to link our friend request with our own server cell.
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* After logging in, we click 'submit' to approve the linkage.
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*
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*/
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function dfrn_request_post(App $a)
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{
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if (($a->argc != 2) || (!count($a->profile))) {
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Logger::log('Wrong count of argc or profiles: argc=' . $a->argc . ',profile()=' . count($a->profile));
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return;
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}
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if (x($_POST, 'cancel')) {
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$a->internalRedirect();
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}
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/*
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* Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
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* to confirm the request, and then we've clicked submit (perhaps after logging in).
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* That brings us here:
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*/
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if ((x($_POST, 'localconfirm')) && ($_POST['localconfirm'] == 1)) {
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// Ensure this is a valid request
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if (local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST, 'dfrn_url'))) {
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$dfrn_url = Strings::removeTags(trim($_POST['dfrn_url']));
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$aes_allow = (((x($_POST, 'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
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$confirm_key = ((x($_POST, 'confirm_key')) ? $_POST['confirm_key'] : "");
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$hidden = ((x($_POST, 'hidden-contact')) ? intval($_POST['hidden-contact']) : 0);
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$contact_record = null;
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$blocked = 1;
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$pending = 1;
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if (x($dfrn_url)) {
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// Lookup the contact based on their URL (which is the only unique thing we have at the moment)
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$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND NOT `self` LIMIT 1",
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intval(local_user()),
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DBA::escape(normalise_link($dfrn_url))
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);
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if (DBA::isResult($r)) {
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if (strlen($r[0]['dfrn-id'])) {
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// We don't need to be here. It has already happened.
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notice(L10n::t("This introduction has already been accepted.") . EOL);
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return;
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} else {
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$contact_record = $r[0];
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}
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}
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if (is_array($contact_record)) {
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$r = q("UPDATE `contact` SET `ret-aes` = %d, hidden = %d WHERE `id` = %d",
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intval($aes_allow),
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intval($hidden),
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intval($contact_record['id'])
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);
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} else {
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// Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
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$parms = Probe::profile($dfrn_url);
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if (!count($parms)) {
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notice(L10n::t('Profile location is not valid or does not contain profile information.') . EOL);
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return;
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} else {
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if (!x($parms, 'fn')) {
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notice(L10n::t('Warning: profile location has no identifiable owner name.') . EOL);
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}
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if (!x($parms, 'photo')) {
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notice(L10n::t('Warning: profile location has no profile photo.') . EOL);
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}
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$invalid = Probe::validDfrn($parms);
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if ($invalid) {
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notice(L10n::tt("%d required parameter was not found at the given location", "%d required parameters were not found at the given location", $invalid) . EOL);
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return;
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}
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}
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$dfrn_request = $parms['dfrn-request'];
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$photo = $parms["photo"];
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// Escape the entire array
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DBA::escapeArray($parms);
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// Create a contact record on our site for the other person
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$r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `nurl`, `addr`, `name`, `nick`, `photo`, `site-pubkey`,
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`request`, `confirm`, `notify`, `poll`, `network`, `aes_allow`, `hidden`, `blocked`, `pending`)
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VALUES ( %d, '%s', '%s', '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, %d)",
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intval(local_user()),
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DateTimeFormat::utcNow(),
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DBA::escape($dfrn_url),
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DBA::escape(normalise_link($dfrn_url)),
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$parms['addr'],
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$parms['fn'],
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$parms['nick'],
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$parms['photo'],
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$parms['key'],
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$parms['dfrn-request'],
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$parms['dfrn-confirm'],
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$parms['dfrn-notify'],
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$parms['dfrn-poll'],
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DBA::escape(Protocol::DFRN),
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intval($aes_allow),
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intval($hidden),
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intval($blocked),
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intval($pending)
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);
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}
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if ($r) {
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info(L10n::t("Introduction complete.") . EOL);
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}
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$r = q("SELECT `id`, `network` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `site-pubkey` = '%s' LIMIT 1",
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intval(local_user()),
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DBA::escape($dfrn_url),
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$parms['key'] // this was already escaped
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);
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if (DBA::isResult($r)) {
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Group::addMember(User::getDefaultGroup(local_user(), $r[0]["network"]), $r[0]['id']);
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if (isset($photo)) {
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Contact::updateAvatar($photo, local_user(), $r[0]["id"], true);
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}
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$forward_path = "contact/" . $r[0]['id'];
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} else {
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$forward_path = "contact";
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}
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// Allow the blocked remote notification to complete
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if (is_array($contact_record)) {
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$dfrn_request = $contact_record['request'];
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}
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if (strlen($dfrn_request) && strlen($confirm_key)) {
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$s = Network::fetchUrl($dfrn_request . '?confirm_key=' . $confirm_key);
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}
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// (ignore reply, nothing we can do it failed)
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$a->internalRedirect($forward_path);
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return; // NOTREACHED
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}
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}
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// invalid/bogus request
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notice(L10n::t('Unrecoverable protocol error.') . EOL);
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$a->internalRedirect();
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return; // NOTREACHED
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}
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/*
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* Otherwise:
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*
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* Scenario 1:
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* We are the requestee. A person from a remote cell has made an introduction
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* on our profile web page and clicked submit. We will use their DFRN-URL to
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* figure out how to contact their cell.
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*
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* Scrape the originating DFRN-URL for everything we need. Create a contact record
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* and an introduction to show our user next time he/she logs in.
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* Finally redirect back to the requestor so that their site can record the request.
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* If our user (the requestee) later confirms this request, a record of it will need
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* to exist on the requestor's cell in order for the confirmation process to complete..
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*
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* It's possible that neither the requestor or the requestee are logged in at the moment,
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* and the requestor does not yet have any credentials to the requestee profile.
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*
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* Who is the requestee? We've already loaded their profile which means their nickname should be
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* in $a->argv[1] and we should have their complete info in $a->profile.
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*
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*/
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if (!(is_array($a->profile) && count($a->profile))) {
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notice(L10n::t('Profile unavailable.') . EOL);
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return;
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}
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$nickname = $a->profile['nickname'];
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$notify_flags = $a->profile['notify-flags'];
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$uid = $a->profile['uid'];
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$maxreq = intval($a->profile['maxreq']);
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$contact_record = null;
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$failed = false;
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$parms = null;
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$blocked = 1;
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$pending = 1;
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if (x($_POST, 'dfrn_url')) {
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// Block friend request spam
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if ($maxreq) {
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$r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
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DBA::escape(DateTimeFormat::utc('now - 24 hours')),
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intval($uid)
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);
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if (DBA::isResult($r) && count($r) > $maxreq) {
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notice(L10n::t('%s has received too many connection requests today.', $a->profile['name']) . EOL);
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notice(L10n::t('Spam protection measures have been invoked.') . EOL);
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notice(L10n::t('Friends are advised to please try again in 24 hours.') . EOL);
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return;
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}
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}
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/* Cleanup old introductions that remain blocked.
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* Also remove the contact record, but only if there is no existing relationship
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*/
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$r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel`
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FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
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WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0
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AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE "
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);
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if (DBA::isResult($r)) {
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foreach ($r as $rr) {
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if (!$rr['rel']) {
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DBA::delete('contact', ['id' => $rr['cid'], 'self' => false]);
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}
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DBA::delete('intro', ['id' => $rr['iid']]);
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}
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}
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$real_name = x($_POST, 'realname') ? Strings::removeTags(trim($_POST['realname'])) : '';
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$url = trim($_POST['dfrn_url']);
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if (!strlen($url)) {
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notice(L10n::t("Invalid locator") . EOL);
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return;
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}
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$hcard = '';
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// Detect the network
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$data = Probe::uri($url);
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$network = $data["network"];
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// Canonicalise email-style profile locator
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$url = Probe::webfingerDfrn($url, $hcard);
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if (substr($url, 0, 5) === 'stat:') {
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// Every time we detect the remote subscription we define this as OStatus.
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// We do this even if it is not OStatus.
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// we only need to pass this through another section of the code.
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if ($network != Protocol::DIASPORA) {
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$network = Protocol::OSTATUS;
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}
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$url = substr($url, 5);
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} else {
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$network = Protocol::DFRN;
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}
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Logger::log('dfrn_request: url: ' . $url . ',network=' . $network, Logger::DEBUG);
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if ($network === Protocol::DFRN) {
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$ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
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intval($uid),
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DBA::escape($url)
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);
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if (DBA::isResult($ret)) {
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if (strlen($ret[0]['issued-id'])) {
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notice(L10n::t('You have already introduced yourself here.') . EOL);
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return;
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} elseif ($ret[0]['rel'] == Contact::FRIEND) {
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notice(L10n::t('Apparently you are already friends with %s.', $a->profile['name']) . EOL);
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return;
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} else {
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$contact_record = $ret[0];
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$parms = ['dfrn-request' => $ret[0]['request']];
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}
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}
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$issued_id = Strings::getRandomHex();
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if (is_array($contact_record)) {
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// There is a contact record but no issued-id, so this
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// is a reciprocal introduction from a known contact
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$r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d",
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DBA::escape($issued_id),
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intval($contact_record['id'])
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