418 lines
12 KiB
PHP
418 lines
12 KiB
PHP
<?php
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require_once('include/items.php');
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require_once('include/auth.php');
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function dfrn_poll_init(&$a) {
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$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')) ? $_GET['destination_url'] : '');
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$challenge = ((x($_GET,'challenge')) ? $_GET['challenge'] : '');
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$sec = ((x($_GET,'sec')) ? $_GET['sec'] : '');
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$dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
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$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 === '') && (! x($_POST,'dfrn_id')) && ($a->argc > 1)) {
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header("Content-type: application/atom+xml");
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$o = get_feed_for($a, '*', $a->argv[1],$last_update);
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echo $o;
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killme();
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}
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if(($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:' . $dfrn_id;
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break;
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default:
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goaway($a->get_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(count($r)) {
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$s = fetch_url($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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$xml = simplexml_load_string($s);
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if((int) $xml->status == 1) {
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$_SESSION['authenticated'] = 1;
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$_SESSION['visitor_id'] = $r[0]['id'];
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notice( $r[0]['username'] . t(' welcomes ') . $r[0]['name'] . EOL);
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// Visitors get 1 day session.
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$session_id = session_id();
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$expire = time() + 86400;
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q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
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dbesc($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 : $a->get_baseurl() . '/profile/' . $profile);
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}
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goaway($a->get_baseurl());
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}
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if($type === 'profile-check') {
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if((strlen($challenge)) && (strlen($sec))) {
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q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
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$r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
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dbesc($sec)
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);
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if(! count($r)) {
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xml_status(3);
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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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$c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
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intval($r[0]['cid'])
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);
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if(! count($c)) {
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xml_status(3);
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}
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$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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}
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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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if($final_dfrn_id != $orig_id) {
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// did not decode properly - cannot trust this site
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xml_status(3);
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}
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header("Content-type: text/xml");
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echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
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killme();
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// NOTREACHED
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}
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else {
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// old protocol
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switch($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:' . $dfrn_id;
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break;
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default:
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break;
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}
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q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
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$r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
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dbesc($dfrn_id));
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if(count($r)) {
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xml_status(1);
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return; // NOTREACHED
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}
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xml_status(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(&$a) {
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$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')) ? $_POST['url'] : '');
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$dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
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$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(! count($r))
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killme();
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$type = $r[0]['type'];
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$last_update = $r[0]['last_update'];
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$r = q("DELETE 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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$sql_extra = '';
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switch($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:' . $dfrn_id;
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break;
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default:
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goaway($a->get_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 $sql_extra LIMIT 1");
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if(! count($r))
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killme();
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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(count($r)) {
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$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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}
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else {
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header("Content-type: application/atom+xml");
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$o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
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echo $o;
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killme();
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}
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}
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function dfrn_poll_content(&$a) {
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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) $_GET['dfrn_version'] : 2.0);
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$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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$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
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if($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($dfrn_id));
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$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:' . $dfrn_id;
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break;
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default:
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goaway($a->get_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(count($r)) {
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$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($r[0]['pubkey'])) {
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openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
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openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
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}
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else {
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openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
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openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
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}
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$challenge = bin2hex($challenge);
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$encrypted_id = bin2hex($encrypted_id);
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}
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else {
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$status = 1;
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$challenge = '';
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$encrypted_id = '';
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}
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if(($type === 'profile') && (strlen($sec))) {
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// URL reply
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$s = fetch_url($r[0]['poll']
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. '?dfrn_id=' . $encrypted_id
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. '&type=profile-check'
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. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
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. '&challenge=' . $challenge
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. '&sec=' . $sec
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);
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logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
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if(strlen($s) && strstr($s,'<?xml')) {
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$xml = simplexml_load_string($s);
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logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
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logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
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logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
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if(((int) $xml->status == 0) && ($xml->challenge == $hash) && ($xml->sec == $sec)) {
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$_SESSION['authenticated'] = 1;
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$_SESSION['visitor_id'] = $r[0]['id'];
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notice( $r[0]['username'] . t(' welcomes ') . $r[0]['name'] . EOL);
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// Visitors get 1 day session.
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$session_id = session_id();
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$expire = time() + 86400;
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q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
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dbesc($expire),
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dbesc($session_id)
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);
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}
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$profile = $r[0]['nickname'];
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goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
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}
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goaway($a->get_baseurl());
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// NOTREACHED
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}
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else {
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// XML reply
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header("Content-type: text/xml");
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echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
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. '<dfrn_poll>' . "\r\n"
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. "\t" . '<status>' . $status . '</status>' . "\r\n"
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. "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
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. "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
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. "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
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. '</dfrn_poll>' . "\r\n" ;
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killme();
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// NOTREACHED
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}
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}
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}
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