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'))) {
30 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
36 $r = q("SELECT `hidewall`,`nickname` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
39 if((! count($r)) || (count($r) && $r[0]['hidewall']))
41 $user = $r[0]['nickname'];
44 logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] . ' for ' . $user);
45 header("Content-type: application/atom+xml");
46 echo get_feed_for($a, '', $user,$last_update);
50 if(($type === 'profile') && (! strlen($sec))) {
55 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
59 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
60 $my_id = '1:' . $dfrn_id;
63 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
64 $my_id = '0:' . $dfrn_id;
71 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
72 FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
73 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
74 AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
80 $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
82 logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
86 $xml = parse_xml_string($s);
88 if((int) $xml->status == 1) {
89 $_SESSION['authenticated'] = 1;
90 $_SESSION['visitor_id'] = $r[0]['id'];
91 $_SESSION['visitor_home'] = $r[0]['url'];
92 $_SESSION['visitor_handle'] = $r[0]['addr'];
93 $_SESSION['visitor_visiting'] = $r[0]['uid'];
94 info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
95 // Visitors get 1 day session.
96 $session_id = session_id();
97 $expire = time() + 86400;
98 q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
104 $profile = $r[0]['nickname'];
105 goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
111 if($type === 'profile-check' && $dfrn_version < 2.2 ) {
113 if((strlen($challenge)) && (strlen($sec))) {
115 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
116 $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
120 xml_status(3, 'No ticket');
123 $orig_id = $r[0]['dfrn_id'];
124 if(strpos($orig_id, ':'))
125 $orig_id = substr($orig_id,2);
127 $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
131 xml_status(3, 'No profile');
135 $sent_dfrn_id = hex2bin($dfrn_id);
136 $challenge = hex2bin($challenge);
140 if(($contact['duplex']) && strlen($contact['prvkey'])) {
141 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
142 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
145 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
146 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
149 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
151 if(strpos($final_dfrn_id,':') == 1)
152 $final_dfrn_id = substr($final_dfrn_id,2);
154 if($final_dfrn_id != $orig_id) {
155 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
156 // did not decode properly - cannot trust this site
157 xml_status(3, 'Bad decryption');
160 header("Content-type: text/xml");
161 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
170 $dfrn_id = '0:' . $dfrn_id;
173 $dfrn_id = '1:' . $dfrn_id;
180 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
181 $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
185 return; // NOTREACHED
188 return; // NOTREACHED
196 function dfrn_poll_post(&$a) {
198 $dfrn_id = ((x($_POST,'dfrn_id')) ? $_POST['dfrn_id'] : '');
199 $challenge = ((x($_POST,'challenge')) ? $_POST['challenge'] : '');
200 $url = ((x($_POST,'url')) ? $_POST['url'] : '');
201 $sec = ((x($_POST,'sec')) ? $_POST['sec'] : '');
202 $ptype = ((x($_POST,'type')) ? $_POST['type'] : '');
203 $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
204 $perm = ((x($_POST,'perm')) ? $_POST['perm'] : 'r');
206 if($ptype === 'profile-check') {
208 if((strlen($challenge)) && (strlen($sec))) {
210 logger('dfrn_poll: POST: profile-check');
212 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
213 $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
217 xml_status(3, 'No ticket');
220 $orig_id = $r[0]['dfrn_id'];
221 if(strpos($orig_id, ':'))
222 $orig_id = substr($orig_id,2);
224 $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
228 xml_status(3, 'No profile');
232 $sent_dfrn_id = hex2bin($dfrn_id);
233 $challenge = hex2bin($challenge);
237 if(($contact['duplex']) && strlen($contact['prvkey'])) {
238 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
239 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
242 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
243 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
246 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
248 if(strpos($final_dfrn_id,':') == 1)
249 $final_dfrn_id = substr($final_dfrn_id,2);
251 if($final_dfrn_id != $orig_id) {
252 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
253 // did not decode properly - cannot trust this site
254 xml_status(3, 'Bad decryption');
257 header("Content-type: text/xml");
258 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
266 if(strpos($dfrn_id,':') == 1) {
267 $direction = intval(substr($dfrn_id,0,1));
268 $dfrn_id = substr($dfrn_id,2);
272 $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
280 $type = $r[0]['type'];
281 $last_update = $r[0]['last_update'];
283 $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
292 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
296 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
297 $my_id = '1:' . $dfrn_id;
300 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
301 $my_id = '0:' . $dfrn_id;
309 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
316 $owner_uid = $r[0]['uid'];
317 $contact_id = $r[0]['id'];
320 if($type === 'reputation' && strlen($url)) {
321 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
329 $reputation = $r[0]['rating'];
330 $text = $r[0]['reason'];
332 if($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed
338 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
341 <rating>$reputation</rating>
342 <description>$text</description>
350 // Update the writable flag if it changed
351 logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
352 if($dfrn_version >= 2.21) {
358 if($writable != $contact['writable']) {
359 q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d LIMIT 1",
366 header("Content-type: application/atom+xml");
367 $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
374 function dfrn_poll_content(&$a) {
376 $dfrn_id = ((x($_GET,'dfrn_id')) ? $_GET['dfrn_id'] : '');
377 $type = ((x($_GET,'type')) ? $_GET['type'] : 'data');
378 $last_update = ((x($_GET,'last_update')) ? $_GET['last_update'] : '');
379 $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : '');
380 $sec = ((x($_GET,'sec')) ? $_GET['sec'] : '');
381 $dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
382 $perm = ((x($_GET,'perm')) ? $_GET['perm'] : 'r');
385 if(strpos($dfrn_id,':') == 1) {
386 $direction = intval(substr($dfrn_id,0,1));
387 $dfrn_id = substr($dfrn_id,2);
392 // initial communication from external contact
393 $hash = random_string();
397 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
399 if($type !== 'profile') {
400 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
401 VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
404 intval(time() + 60 ),
412 if($type === 'profile')
413 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
415 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
419 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
420 $my_id = '1:' . $dfrn_id;
423 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
424 $my_id = '0:' . $dfrn_id;
431 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
432 FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
433 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
434 AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
442 $id_str = $my_id . '.' . mt_rand(1000,9999);
444 if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
445 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
446 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
449 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
450 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
453 $challenge = bin2hex($challenge);
454 $encrypted_id = bin2hex($encrypted_id);
462 if(($type === 'profile') && (strlen($sec))) {
466 if($dfrn_version < 2.2) {
467 $s = fetch_url($r[0]['poll']
468 . '?dfrn_id=' . $encrypted_id
469 . '&type=profile-check'
470 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
471 . '&challenge=' . $challenge
476 $s = post_url($r[0]['poll'], array(
477 'dfrn_id' => $encrypted_id,
478 'type' => 'profile-check',
479 'dfrn_version' => DFRN_PROTOCOL_VERSION,
480 'challenge' => $challenge,
485 $profile = $r[0]['nickname'];
487 switch($destination_url) {
489 $dest = $a->get_baseurl() . '/profile/' . $profile . '?tab=profile';
492 $dest = $a->get_baseurl() . '/photos/' . $profile;
496 $dest = $a->get_baseurl() . '/profile/' . $profile;
499 $dest = $destination_url;
503 logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
505 if(strlen($s) && strstr($s,'<?xml')) {
507 $xml = parse_xml_string($s);
509 logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
511 logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
512 logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
515 if(((int) $xml->status == 0) && ($xml->challenge == $hash) && ($xml->sec == $sec)) {
516 $_SESSION['authenticated'] = 1;
517 $_SESSION['visitor_id'] = $r[0]['id'];
518 $_SESSION['visitor_home'] = $r[0]['url'];
519 $_SESSION['visitor_visiting'] = $r[0]['uid'];
520 info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
521 // Visitors get 1 day session.
522 $session_id = session_id();
523 $expire = time() + 86400;
524 q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
538 header("Content-type: text/xml");
539 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
540 . '<dfrn_poll>' . "\r\n"
541 . "\t" . '<status>' . $status . '</status>' . "\r\n"
542 . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
543 . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
544 . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
545 . '</dfrn_poll>' . "\r\n" ;