5 require_once('include/items.php');
6 require_once('include/auth.php');
9 function dfrn_poll_init(&$a) {
12 $dfrn_id = ((x($_GET,'dfrn_id')) ? $_GET['dfrn_id'] : '');
13 $type = ((x($_GET,'type')) ? $_GET['type'] : 'data');
14 $last_update = ((x($_GET,'last_update')) ? $_GET['last_update'] : '');
15 $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : '');
16 $challenge = ((x($_GET,'challenge')) ? $_GET['challenge'] : '');
17 $sec = ((x($_GET,'sec')) ? $_GET['sec'] : '');
18 $dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
19 $perm = ((x($_GET,'perm')) ? $_GET['perm'] : 'r');
24 if(strpos($dfrn_id,':') == 1) {
25 $direction = intval(substr($dfrn_id,0,1));
26 $dfrn_id = substr($dfrn_id,2);
29 if(($dfrn_id === '') && (! x($_POST,'dfrn_id')) && ($a->argc > 1)) {
30 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
34 $r = q("SELECT `hidewall` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
37 if(count($r) && $r[0]['hidewall'])
40 logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] );
41 header("Content-type: application/atom+xml");
42 $o = get_feed_for($a, '', $a->argv[1],$last_update);
47 if(($type === 'profile') && (! strlen($sec))) {
52 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
56 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
57 $my_id = '1:' . $dfrn_id;
60 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
61 $my_id = '0:' . $dfrn_id;
68 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
69 FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
70 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
71 AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
77 $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
79 logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
83 $xml = parse_xml_string($s);
85 if((int) $xml->status == 1) {
86 $_SESSION['authenticated'] = 1;
87 $_SESSION['visitor_id'] = $r[0]['id'];
88 $_SESSION['visitor_home'] = $r[0]['url'];
89 $_SESSION['visitor_visiting'] = $r[0]['uid'];
90 info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
91 // Visitors get 1 day session.
92 $session_id = session_id();
93 $expire = time() + 86400;
94 q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
100 $profile = $r[0]['nickname'];
101 goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
107 if($type === 'profile-check' && $dfrn_version < 2.2 ) {
109 if((strlen($challenge)) && (strlen($sec))) {
111 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
112 $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
116 xml_status(3, 'No ticket');
119 $orig_id = $r[0]['dfrn_id'];
120 if(strpos($orig_id, ':'))
121 $orig_id = substr($orig_id,2);
123 $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
127 xml_status(3, 'No profile');
131 $sent_dfrn_id = hex2bin($dfrn_id);
132 $challenge = hex2bin($challenge);
136 if(($contact['duplex']) && strlen($contact['prvkey'])) {
137 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
138 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
141 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
142 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
145 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
147 if(strpos($final_dfrn_id,':') == 1)
148 $final_dfrn_id = substr($final_dfrn_id,2);
150 if($final_dfrn_id != $orig_id) {
151 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
152 // did not decode properly - cannot trust this site
153 xml_status(3, 'Bad decryption');
156 header("Content-type: text/xml");
157 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
166 $dfrn_id = '0:' . $dfrn_id;
169 $dfrn_id = '1:' . $dfrn_id;
176 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
177 $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
181 return; // NOTREACHED
184 return; // NOTREACHED
192 function dfrn_poll_post(&$a) {
194 $dfrn_id = ((x($_POST,'dfrn_id')) ? $_POST['dfrn_id'] : '');
195 $challenge = ((x($_POST,'challenge')) ? $_POST['challenge'] : '');
196 $url = ((x($_POST,'url')) ? $_POST['url'] : '');
197 $sec = ((x($_POST,'sec')) ? $_POST['sec'] : '');
198 $ptype = ((x($_POST,'type')) ? $_POST['type'] : '');
199 $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
200 $perm = ((x($_POST,'perm')) ? $_POST['perm'] : 'r');
202 if($ptype === 'profile-check') {
204 if((strlen($challenge)) && (strlen($sec))) {
206 logger('dfrn_poll: POST: profile-check');
208 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
209 $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
213 xml_status(3, 'No ticket');
216 $orig_id = $r[0]['dfrn_id'];
217 if(strpos($orig_id, ':'))
218 $orig_id = substr($orig_id,2);
220 $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
224 xml_status(3, 'No profile');
228 $sent_dfrn_id = hex2bin($dfrn_id);
229 $challenge = hex2bin($challenge);
233 if(($contact['duplex']) && strlen($contact['prvkey'])) {
234 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
235 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
238 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
239 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
242 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
244 if(strpos($final_dfrn_id,':') == 1)
245 $final_dfrn_id = substr($final_dfrn_id,2);
247 if($final_dfrn_id != $orig_id) {
248 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
249 // did not decode properly - cannot trust this site
250 xml_status(3, 'Bad decryption');
253 header("Content-type: text/xml");
254 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
262 if(strpos($dfrn_id,':') == 1) {
263 $direction = intval(substr($dfrn_id,0,1));
264 $dfrn_id = substr($dfrn_id,2);
268 $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
276 $type = $r[0]['type'];
277 $last_update = $r[0]['last_update'];
279 $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
288 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
292 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
293 $my_id = '1:' . $dfrn_id;
296 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
297 $my_id = '0:' . $dfrn_id;
305 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
312 $owner_uid = $r[0]['uid'];
313 $contact_id = $r[0]['id'];
316 if($type === 'reputation' && strlen($url)) {
317 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
325 $reputation = $r[0]['rating'];
326 $text = $r[0]['reason'];
328 if($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed
334 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
337 <rating>$reputation</rating>
338 <description>$text</description>
346 // Update the writable flag if it changed
347 logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
348 if($dfrn_version >= 2.21) {
354 if($writable != $contact['writable']) {
355 q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d LIMIT 1",
362 header("Content-type: application/atom+xml");
363 $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
370 function dfrn_poll_content(&$a) {
372 $dfrn_id = ((x($_GET,'dfrn_id')) ? $_GET['dfrn_id'] : '');
373 $type = ((x($_GET,'type')) ? $_GET['type'] : 'data');
374 $last_update = ((x($_GET,'last_update')) ? $_GET['last_update'] : '');
375 $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : '');
376 $sec = ((x($_GET,'sec')) ? $_GET['sec'] : '');
377 $dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
378 $perm = ((x($_GET,'perm')) ? $_GET['perm'] : 'r');
381 if(strpos($dfrn_id,':') == 1) {
382 $direction = intval(substr($dfrn_id,0,1));
383 $dfrn_id = substr($dfrn_id,2);
388 // initial communication from external contact
389 $hash = random_string();
393 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
395 if($type !== 'profile') {
396 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
397 VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
400 intval(time() + 60 ),
408 if($type === 'profile')
409 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
411 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
415 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
416 $my_id = '1:' . $dfrn_id;
419 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
420 $my_id = '0:' . $dfrn_id;
427 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
428 FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
429 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
430 AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
438 $id_str = $my_id . '.' . mt_rand(1000,9999);
440 if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
441 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
442 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
445 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
446 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
449 $challenge = bin2hex($challenge);
450 $encrypted_id = bin2hex($encrypted_id);
458 if(($type === 'profile') && (strlen($sec))) {
462 if($dfrn_version < 2.2) {
463 $s = fetch_url($r[0]['poll']
464 . '?dfrn_id=' . $encrypted_id
465 . '&type=profile-check'
466 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
467 . '&challenge=' . $challenge
472 $s = post_url($r[0]['poll'], array(
473 'dfrn_id' => $encrypted_id,
474 'type' => 'profile-check',
475 'dfrn_version' => DFRN_PROTOCOL_VERSION,
476 'challenge' => $challenge,
481 $profile = $r[0]['nickname'];
483 switch($destination_url) {
485 $dest = $a->get_baseurl() . '/profile/' . $profile . '?tab=profile';
488 $dest = $a->get_baseurl() . '/photos/' . $profile;
492 $dest = $a->get_baseurl() . '/profile/' . $profile;
495 $dest = $destination_url;
499 logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
501 if(strlen($s) && strstr($s,'<?xml')) {
503 $xml = parse_xml_string($s);
505 logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
507 logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
508 logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
511 if(((int) $xml->status == 0) && ($xml->challenge == $hash) && ($xml->sec == $sec)) {
512 $_SESSION['authenticated'] = 1;
513 $_SESSION['visitor_id'] = $r[0]['id'];
514 $_SESSION['visitor_home'] = $r[0]['url'];
515 $_SESSION['visitor_visiting'] = $r[0]['uid'];
516 info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
517 // Visitors get 1 day session.
518 $session_id = session_id();
519 $expire = time() + 86400;
520 q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
534 header("Content-type: text/xml");
535 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
536 . '<dfrn_poll>' . "\r\n"
537 . "\t" . '<status>' . $status . '</status>' . "\r\n"
538 . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
539 . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
540 . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
541 . '</dfrn_poll>' . "\r\n" ;