573 lines
17 KiB
PHP
573 lines
17 KiB
PHP
<?php
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/**
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* @file mod/dfrn_poll.php
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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\System;
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use Friendica\Database\DBA;
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use Friendica\Module\Login;
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use Friendica\Protocol\DFRN;
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use Friendica\Protocol\OStatus;
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use Friendica\Util\Network;
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use Friendica\Util\XML;
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require_once 'include/items.php';
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function dfrn_poll_init(App $a)
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{
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Login::sessionAuth();
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$dfrn_id = defaults($_GET, 'dfrn_id' , '');
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$type = defaults($_GET, 'type' , 'data');
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$last_update = defaults($_GET, 'last_update' , '');
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$destination_url = defaults($_GET, 'destination_url', '');
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$challenge = defaults($_GET, 'challenge' , '');
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$sec = defaults($_GET, 'sec' , '');
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$dfrn_version = (float) defaults($_GET, 'dfrn_version' , 2.0);
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$perm = defaults($_GET, 'perm' , 'r');
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$quiet = x($_GET, 'quiet');
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// Possibly it is an OStatus compatible server that requests a user feed
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if (($a->argc > 1) && ($dfrn_id == '') && !strstr($_SERVER["HTTP_USER_AGENT"], 'Friendica')) {
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$nickname = $a->argv[1];
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header("Content-type: application/atom+xml");
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echo OStatus::feed($nickname, $last_update, 10);
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killme();
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}
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$direction = -1;
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if (strpos($dfrn_id, ':') == 1) {
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$direction = intval(substr($dfrn_id, 0, 1));
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$dfrn_id = substr($dfrn_id, 2);
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}
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$hidewall = false;
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if (($dfrn_id === '') && (!x($_POST, 'dfrn_id'))) {
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if (Config::get('system', 'block_public') && !local_user() && !remote_user()) {
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System::httpExit(403);
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}
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$user = '';
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if ($a->argc > 1) {
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$r = q("SELECT `hidewall`,`nickname` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
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dbesc($a->argv[1])
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);
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if (!$r) {
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System::httpExit(404);
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}
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$hidewall = ($r[0]['hidewall'] && !local_user());
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$user = $r[0]['nickname'];
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}
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logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] . ' for ' . $user);
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header("Content-type: application/atom+xml");
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echo DFRN::feed('', $user, $last_update, 0, $hidewall);
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killme();
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}
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if (($type === 'profile') && (!strlen($sec))) {
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$sql_extra = '';
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switch ($direction) {
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case -1:
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$sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
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$my_id = $dfrn_id;
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break;
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case 0:
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$sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
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$my_id = '1:' . $dfrn_id;
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break;
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case 1:
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$sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
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$my_id = '0:' . $dfrn_id;
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break;
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default:
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goaway(System::baseUrl());
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break; // NOTREACHED
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}
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$r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
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FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
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WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
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AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
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dbesc($a->argv[1])
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);
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if (DBA::isResult($r)) {
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$s = Network::fetchUrl($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
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logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
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if (strlen($s)) {
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$xml = XML::parseString($s);
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if ((int) $xml->status === 1) {
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$_SESSION['authenticated'] = 1;
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if (!x($_SESSION, 'remote')) {
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$_SESSION['remote'] = [];
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}
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$_SESSION['remote'][] = ['cid' => $r[0]['id'], 'uid' => $r[0]['uid'], 'url' => $r[0]['url']];
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$_SESSION['visitor_id'] = $r[0]['id'];
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$_SESSION['visitor_home'] = $r[0]['url'];
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$_SESSION['visitor_handle'] = $r[0]['addr'];
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$_SESSION['visitor_visiting'] = $r[0]['uid'];
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$_SESSION['my_url'] = $r[0]['url'];
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if (!$quiet) {
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info(L10n::t('%1$s welcomes %2$s', $r[0]['username'], $r[0]['name']) . EOL);
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}
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// Visitors get 1 day session.
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$session_id = session_id();
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$expire = time() + 86400;
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q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s'",
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dbesc($expire),
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dbesc($session_id)
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);
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}
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}
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$profile = $r[0]['nickname'];
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goaway((strlen($destination_url)) ? $destination_url : System::baseUrl() . '/profile/' . $profile);
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}
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goaway(System::baseUrl());
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}
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if ($type === 'profile-check' && $dfrn_version < 2.2) {
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if ((strlen($challenge)) && (strlen($sec))) {
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DBA::delete('profile_check', ["`expire` < ?", time()]);
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$r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
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dbesc($sec)
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);
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if (!DBA::isResult($r)) {
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System::xmlExit(3, 'No ticket');
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// NOTREACHED
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}
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$orig_id = $r[0]['dfrn_id'];
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if (strpos($orig_id, ':')) {
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$orig_id = substr($orig_id, 2);
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}
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$c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
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intval($r[0]['cid'])
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);
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if (!DBA::isResult($c)) {
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System::xmlExit(3, 'No profile');
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}
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$contact = $c[0];
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$sent_dfrn_id = hex2bin($dfrn_id);
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$challenge = hex2bin($challenge);
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$final_dfrn_id = '';
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if (($contact['duplex']) && strlen($contact['prvkey'])) {
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openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
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openssl_private_decrypt($challenge, $decoded_challenge, $contact['prvkey']);
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} else {
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openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
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openssl_public_decrypt($challenge, $decoded_challenge, $contact['pubkey']);
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}
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$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
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if (strpos($final_dfrn_id, ':') == 1) {
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$final_dfrn_id = substr($final_dfrn_id, 2);
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}
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if ($final_dfrn_id != $orig_id) {
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logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
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// did not decode properly - cannot trust this site
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System::xmlExit(3, 'Bad decryption');
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}
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header("Content-type: text/xml");
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echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
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killme();
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// NOTREACHED
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} else {
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// old protocol
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switch ($direction) {
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case 1:
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$dfrn_id = '0:' . $dfrn_id;
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break;
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case 0:
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$dfrn_id = '1:' . $dfrn_id;
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break;
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default:
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break;
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}
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DBA::delete('profile_check', ["`expire` < ?", time()]);
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$r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
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dbesc($dfrn_id));
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if (DBA::isResult($r)) {
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System::xmlExit(1);
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return; // NOTREACHED
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}
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System::xmlExit(0);
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return; // NOTREACHED
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}
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}
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}
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function dfrn_poll_post(App $a)
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{
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$dfrn_id = x($_POST,'dfrn_id') ? $_POST['dfrn_id'] : '';
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$challenge = x($_POST,'challenge') ? $_POST['challenge'] : '';
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$url = x($_POST,'url') ? $_POST['url'] : '';
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$sec = x($_POST,'sec') ? $_POST['sec'] : '';
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$ptype = x($_POST,'type') ? $_POST['type'] : '';
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$dfrn_version = x($_POST,'dfrn_version') ? (float) $_POST['dfrn_version'] : 2.0;
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$perm = x($_POST,'perm') ? $_POST['perm'] : 'r';
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if ($ptype === 'profile-check') {
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if (strlen($challenge) && strlen($sec)) {
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logger('dfrn_poll: POST: profile-check');
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DBA::delete('profile_check', ["`expire` < ?", time()]);
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$r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
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dbesc($sec)
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);
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if (!DBA::isResult($r)) {
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System::xmlExit(3, 'No ticket');
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// NOTREACHED
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}
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$orig_id = $r[0]['dfrn_id'];
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if (strpos($orig_id, ':')) {
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$orig_id = substr($orig_id, 2);
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}
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$c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
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intval($r[0]['cid'])
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);
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if (!DBA::isResult($c)) {
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System::xmlExit(3, 'No profile');
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}
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$contact = $c[0];
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$sent_dfrn_id = hex2bin($dfrn_id);
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$challenge = hex2bin($challenge);
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$final_dfrn_id = '';
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if ($contact['duplex'] && strlen($contact['prvkey'])) {
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openssl_private_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['prvkey']);
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openssl_private_decrypt($challenge, $decoded_challenge, $contact['prvkey']);
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} else {
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openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
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openssl_public_decrypt($challenge, $decoded_challenge, $contact['pubkey']);
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}
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$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
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if (strpos($final_dfrn_id, ':') == 1) {
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$final_dfrn_id = substr($final_dfrn_id, 2);
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}
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if ($final_dfrn_id != $orig_id) {
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logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
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// did not decode properly - cannot trust this site
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System::xmlExit(3, 'Bad decryption');
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}
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header("Content-type: text/xml");
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echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
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killme();
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// NOTREACHED
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}
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}
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$direction = -1;
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if (strpos($dfrn_id, ':') == 1) {
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$direction = intval(substr($dfrn_id, 0, 1));
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$dfrn_id = substr($dfrn_id, 2);
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}
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$r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
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dbesc($dfrn_id),
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dbesc($challenge)
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);
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if (!DBA::isResult($r)) {
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killme();
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}
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$type = $r[0]['type'];
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$last_update = $r[0]['last_update'];
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DBA::delete('challenge', ['dfrn-id' => $dfrn_id, 'challenge' => $challenge]);
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$sql_extra = '';
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switch ($direction) {
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case -1:
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$sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
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$my_id = $dfrn_id;
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break;
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case 0:
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$sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
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$my_id = '1:' . $dfrn_id;
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break;
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case 1:
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$sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
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$my_id = '0:' . $dfrn_id;
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break;
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default:
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goaway(System::baseUrl());
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break; // NOTREACHED
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}
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$r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
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if (!DBA::isResult($r)) {
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killme();
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}
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$contact = $r[0];
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$owner_uid = $r[0]['uid'];
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$contact_id = $r[0]['id'];
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if ($type === 'reputation' && strlen($url)) {
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$r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
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dbesc($url),
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intval($owner_uid)
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);
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$reputation = 0;
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$text = '';
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if (DBA::isResult($r)) {
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$reputation = $r[0]['rating'];
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$text = $r[0]['reason'];
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if ($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed
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$reputation = 0;
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$text = '';
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}
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}
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echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
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<reputation>
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<url>$url</url>
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<rating>$reputation</rating>
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<description>$text</description>
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</reputation>
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";
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killme();
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// NOTREACHED
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} else {
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// Update the writable flag if it changed
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logger('dfrn_poll: post request feed: ' . print_r($_POST, true), LOGGER_DATA);
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if ($dfrn_version >= 2.21) {
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if ($perm === 'rw') {
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$writable = 1;
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} else {
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$writable = 0;
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}
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if ($writable != $contact['writable']) {
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q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d",
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intval($writable),
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intval($contact_id)
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);
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}
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}
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header("Content-type: application/atom+xml");
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$o = DFRN::feed($dfrn_id, $a->argv[1], $last_update, $direction);
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echo $o;
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killme();
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}
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}
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function dfrn_poll_content(App $a)
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{
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$dfrn_id = x($_GET,'dfrn_id') ? $_GET['dfrn_id'] : '';
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$type = x($_GET,'type') ? $_GET['type'] : 'data';
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$last_update = x($_GET,'last_update') ? $_GET['last_update'] : '';
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$destination_url = x($_GET,'destination_url') ? $_GET['destination_url'] : '';
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$sec = x($_GET,'sec') ? $_GET['sec'] : '';
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$dfrn_version = x($_GET,'dfrn_version') ? (float) $_GET['dfrn_version'] : 2.0;
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$perm = x($_GET,'perm') ? $_GET['perm'] : 'r';
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$quiet = x($_GET,'quiet') ? true : false;
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$direction = -1;
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if (strpos($dfrn_id, ':') == 1) {
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$direction = intval(substr($dfrn_id, 0, 1));
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$dfrn_id = substr($dfrn_id, 2);
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}
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if ($dfrn_id != '') {
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// initial communication from external contact
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$hash = random_string();
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$status = 0;
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DBA::delete('challenge', ["`expire` < ?", time()]);
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if ($type !== 'profile') {
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$r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
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VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
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dbesc($hash),
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dbesc($dfrn_id),
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intval(time() + 60 ),
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dbesc($type),
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dbesc($last_update)
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);
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}
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$sql_extra = '';
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switch ($direction) {
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case -1:
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if ($type === 'profile') {
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$sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
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} else {
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$sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
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}
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$my_id = $dfrn_id;
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break;
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case 0:
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$sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
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$my_id = '1:' . $dfrn_id;
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break;
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case 1:
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$sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
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$my_id = '0:' . $dfrn_id;
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break;
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default:
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goaway(System::baseUrl());
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break; // NOTREACHED
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}
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$nickname = $a->argv[1];
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$r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
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FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
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WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
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AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
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dbesc($nickname)
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);
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if (DBA::isResult($r)) {
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$challenge = '';
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$encrypted_id = '';
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$id_str = $my_id . '.' . mt_rand(1000, 9999);
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if (($r[0]['duplex'] && strlen($r[0]['pubkey'])) || !strlen($r[0]['prvkey'])) {
|
|
openssl_public_encrypt($hash, $challenge, $r[0]['pubkey']);
|
|
openssl_public_encrypt($id_str, $encrypted_id, $r[0]['pubkey']);
|
|
} else {
|
|
openssl_private_encrypt($hash, $challenge, $r[0]['prvkey']);
|
|
openssl_private_encrypt($id_str, $encrypted_id, $r[0]['prvkey']);
|
|
}
|
|
|
|
$challenge = bin2hex($challenge);
|
|
$encrypted_id = bin2hex($encrypted_id);
|
|
} else {
|
|
$status = 1;
|
|
$challenge = '';
|
|
$encrypted_id = '';
|
|
}
|
|
|
|
if (($type === 'profile') && (strlen($sec))) {
|
|
// URL reply
|
|
if ($dfrn_version < 2.2) {
|
|
$s = Network::fetchUrl($r[0]['poll']
|
|
. '?dfrn_id=' . $encrypted_id
|
|
. '&type=profile-check'
|
|
. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
|
|
. '&challenge=' . $challenge
|
|
. '&sec=' . $sec
|
|
);
|
|
} else {
|
|
$s = Network::post($r[0]['poll'], [
|
|
'dfrn_id' => $encrypted_id,
|
|
'type' => 'profile-check',
|
|
'dfrn_version' => DFRN_PROTOCOL_VERSION,
|
|
'challenge' => $challenge,
|
|
'sec' => $sec
|
|
]);
|
|
}
|
|
|
|
$profile = ((DBA::isResult($r) && $r[0]['nickname']) ? $r[0]['nickname'] : $nickname);
|
|
|
|
switch ($destination_url) {
|
|
case 'profile':
|
|
$dest = System::baseUrl() . '/profile/' . $profile . '?f=&tab=profile';
|
|
break;
|
|
case 'photos':
|
|
$dest = System::baseUrl() . '/photos/' . $profile;
|
|
break;
|
|
case 'status':
|
|
case '':
|
|
$dest = System::baseUrl() . '/profile/' . $profile;
|
|
break;
|
|
default:
|
|
$appendix = (strstr($destination_url, '?') ? '&f=&redir=1' : '?f=&redir=1');
|
|
$dest = $destination_url . $appendix;
|
|
break;
|
|
}
|
|
|
|
logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
|
|
|
|
if (strlen($s) && strstr($s, '<?xml')) {
|
|
$xml = XML::parseString($s);
|
|
|
|
logger('dfrn_poll: profile: parsed xml: ' . print_r($xml, true), LOGGER_DATA);
|
|
|
|
logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
|
|
logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
|
|
|
|
if (((int) $xml->status == 0) && ($xml->challenge == $hash) && ($xml->sec == $sec)) {
|
|
$_SESSION['authenticated'] = 1;
|
|
if (!x($_SESSION, 'remote')) {
|
|
$_SESSION['remote'] = [];
|
|
}
|
|
|
|
$_SESSION['remote'][] = ['cid' => $r[0]['id'], 'uid' => $r[0]['uid'], 'url' => $r[0]['url']];
|
|
$_SESSION['visitor_id'] = $r[0]['id'];
|
|
$_SESSION['visitor_home'] = $r[0]['url'];
|
|
$_SESSION['visitor_visiting'] = $r[0]['uid'];
|
|
$_SESSION['my_url'] = $r[0]['url'];
|
|
if (!$quiet) {
|
|
info(L10n::t('%1$s welcomes %2$s', $r[0]['username'], $r[0]['name']) . EOL);
|
|
}
|
|
|
|
// Visitors get 1 day session.
|
|
$session_id = session_id();
|
|
$expire = time() + 86400;
|
|
q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s'",
|
|
dbesc($expire),
|
|
dbesc($session_id)
|
|
);
|
|
}
|
|
|
|
goaway($dest);
|
|
}
|
|
goaway($dest);
|
|
// NOTREACHED
|
|
} else {
|
|
// XML reply
|
|
header("Content-type: text/xml");
|
|
echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
|
|
. '<dfrn_poll>' . "\r\n"
|
|
. "\t" . '<status>' . $status . '</status>' . "\r\n"
|
|
. "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
|
|
. "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
|
|
. "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
|
|
. '</dfrn_poll>' . "\r\n";
|
|
killme();
|
|
// NOTREACHED
|
|
}
|
|
}
|
|
}
|