3 require_once('include/items.php');
4 require_once('include/event.php');
6 require_once('library/defuse/php-encryption-1.2.1/Crypto.php');
8 function dfrn_notify_post(&$a) {
9 logger(__function__, LOGGER_TRACE);
10 $dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : '');
11 $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
12 $challenge = ((x($_POST,'challenge')) ? notags(trim($_POST['challenge'])) : '');
13 $data = ((x($_POST,'data')) ? $_POST['data'] : '');
14 $key = ((x($_POST,'key')) ? $_POST['key'] : '');
15 $rino_remote = ((x($_POST,'rino')) ? intval($_POST['rino']) : 0);
16 $dissolve = ((x($_POST,'dissolve')) ? intval($_POST['dissolve']) : 0);
17 $perm = ((x($_POST,'perm')) ? notags(trim($_POST['perm'])) : 'r');
18 $ssl_policy = ((x($_POST,'ssl_policy')) ? notags(trim($_POST['ssl_policy'])): 'none');
19 $page = ((x($_POST,'page')) ? intval($_POST['page']) : 0);
21 $forum = (($page == 1) ? 1 : 0);
22 $prv = (($page == 2) ? 1 : 0);
25 if($dfrn_version >= 2.21) {
26 $writable = (($perm === 'rw') ? 1 : 0);
30 if(strpos($dfrn_id,':') == 1) {
31 $direction = intval(substr($dfrn_id,0,1));
32 $dfrn_id = substr($dfrn_id,2);
35 $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
40 logger('dfrn_notify: could not match challenge to dfrn_id ' . $dfrn_id . ' challenge=' . $challenge);
44 $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s'",
49 // find the local user who owns this relationship.
54 $sql_extra = sprintf(" AND ( `issued-id` = '%s' OR `dfrn-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
57 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
60 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
67 // be careful - $importer will contain both the contact information for the contact
68 // sending us the post, and also the user information for the person receiving it.
69 // since they are mixed together, it is easy to get them confused.
71 $r = q("SELECT `contact`.*, `contact`.`uid` AS `importer_uid`,
72 `contact`.`pubkey` AS `cpubkey`,
73 `contact`.`prvkey` AS `cprvkey`,
74 `contact`.`thumb` AS `thumb`,
75 `contact`.`url` as `url`,
76 `contact`.`name` as `senderName`,
79 LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
80 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
81 AND `user`.`nickname` = '%s' AND `user`.`account_expired` = 0 AND `user`.`account_removed` = 0 $sql_extra LIMIT 1",
86 logger('dfrn_notify: contact not found for dfrn_id ' . $dfrn_id);
91 // $importer in this case contains the contact record for the remote contact joined with the user record of our user.
95 logger("Remote rino version: ".$rino_remote." for ".$importer["url"], LOGGER_DEBUG);
97 if((($writable != (-1)) && ($writable != $importer['writable'])) || ($importer['forum'] != $forum) || ($importer['prv'] != $prv)) {
98 q("UPDATE `contact` SET `writable` = %d, forum = %d, prv = %d WHERE `id` = %d",
99 intval(($writable == (-1)) ? $importer['writable'] : $writable),
102 intval($importer['id'])
104 if($writable != (-1))
105 $importer['writable'] = $writable;
106 $importer['forum'] = $page;
110 // if contact's ssl policy changed, update our links
112 fix_contact_ssl_policy($importer,$ssl_policy);
114 logger('dfrn_notify: received notify from ' . $importer['name'] . ' for ' . $importer['username']);
115 logger('dfrn_notify: data: ' . $data, LOGGER_DATA);
120 * Relationship is dissolved permanently
123 require_once('include/Contact.php');
124 contact_remove($importer['id']);
125 logger('relationship dissolved : ' . $importer['name'] . ' dissolved ' . $importer['username']);
131 // If we are setup as a soapbox we aren't accepting input from this person
132 // This behaviour is deactivated since it really doesn't make sense to even disallow comments
133 // The check if someone is a friend or simply a follower is done in a later place so it needn't to be done here
134 //if($importer['page-flags'] == PAGE_SOAPBOX)
137 $rino = get_config('system','rino_encrypt');
138 $rino = intval($rino);
139 // use RINO1 if mcrypt isn't installed and RINO2 was selected
140 if ($rino==2 and !function_exists('mcrypt_create_iv')) $rino=1;
142 logger("Local rino version: ". $rino, LOGGER_DEBUG);
146 // if local rino is lower than remote rino, abort: should not happen!
147 // but only for $remote_rino > 1, because old code did't send rino version
148 if ($rino_remote_version > 1 && $rino < $rino_remote) {
149 logger("rino version '$rino_remote' is lower than supported '$rino'");
150 xml_status(0,"rino version '$rino_remote' is lower than supported '$rino'");
153 $rawkey = hex2bin(trim($key));
154 logger('rino: md5 raw key: ' . md5($rawkey));
157 if($dfrn_version >= 2.1) {
158 if((($importer['duplex']) && strlen($importer['cprvkey'])) || (! strlen($importer['cpubkey']))) {
159 openssl_private_decrypt($rawkey,$final_key,$importer['cprvkey']);
162 openssl_public_decrypt($rawkey,$final_key,$importer['cpubkey']);
166 if((($importer['duplex']) && strlen($importer['cpubkey'])) || (! strlen($importer['cprvkey']))) {
167 openssl_public_decrypt($rawkey,$final_key,$importer['cpubkey']);
170 openssl_private_decrypt($rawkey,$final_key,$importer['cprvkey']);
174 #logger('rino: received key : ' . $final_key);
176 switch($rino_remote) {
179 // we got a key. old code send only the key, without RINO version.
180 // we assume RINO 1 if key and no RINO version
181 $data = aes_decrypt(hex2bin($data),$final_key);
185 $data = Crypto::decrypt(hex2bin($data),$final_key);
186 } catch (InvalidCiphertext $ex) { // VERY IMPORTANT
188 // 1. The ciphertext was modified by the attacker,
189 // 2. The key is wrong, or
190 // 3. $ciphertext is not a valid ciphertext or was corrupted.
192 logger('The ciphertext has been tampered with!');
193 xml_status(0,'The ciphertext has been tampered with!');
194 } catch (Ex\CryptoTestFailed $ex) {
195 logger('Cannot safely perform dencryption');
196 xml_status(0,'CryptoTestFailed');
197 } catch (Ex\CannotPerformOperation $ex) {
198 logger('Cannot safely perform decryption');
199 xml_status(0,'Cannot safely perform decryption');
203 logger("rino: invalid sent verision '$rino_remote'");
208 logger('rino: decrypted data: ' . $data, LOGGER_DATA);
211 $ret = local_delivery($importer,$data);
218 function dfrn_notify_content(&$a) {
220 if(x($_GET,'dfrn_id')) {
222 // initial communication from external contact, $direction is their direction.
223 // If this is a duplex communication, ours will be the opposite.
225 $dfrn_id = notags(trim($_GET['dfrn_id']));
226 $dfrn_version = (float) $_GET['dfrn_version'];
227 $rino_remote = ((x($_GET,'rino')) ? intval($_GET['rino']) : 0);
231 logger('dfrn_notify: new notification dfrn_id=' . $dfrn_id);
234 if(strpos($dfrn_id,':') == 1) {
235 $direction = intval(substr($dfrn_id,0,1));
236 $dfrn_id = substr($dfrn_id,2);
239 $hash = random_string();
243 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
245 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
246 VALUES( '%s', '%s', %d, '%s', '%s' ) ",
249 intval(time() + 90 ),
254 logger('dfrn_notify: challenge=' . $hash, LOGGER_DEBUG);
259 $sql_extra = sprintf(" AND ( `issued-id` = '%s' OR `dfrn-id` = '%s' ) ", dbesc($dfrn_id), dbesc($dfrn_id));
263 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
264 $my_id = '1:' . $dfrn_id;
267 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
268 $my_id = '0:' . $dfrn_id;
275 $r = q("SELECT `contact`.*, `user`.`nickname`, `user`.`page-flags` FROM `contact` LEFT JOIN `user` ON `user`.`uid` = `contact`.`uid`
276 WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0 AND `user`.`nickname` = '%s'
277 AND `user`.`account_expired` = 0 AND `user`.`account_removed` = 0 $sql_extra LIMIT 1",
284 logger("Remote rino version: ".$rino_remote." for ".$r[0]["url"], LOGGER_DEBUG);
288 $id_str = $my_id . '.' . mt_rand(1000,9999);
290 $prv_key = trim($r[0]['prvkey']);
291 $pub_key = trim($r[0]['pubkey']);
292 $dplx = intval($r[0]['duplex']);
294 if((($dplx) && (strlen($prv_key))) || ((strlen($prv_key)) && (!(strlen($pub_key))))) {
295 openssl_private_encrypt($hash,$challenge,$prv_key);
296 openssl_private_encrypt($id_str,$encrypted_id,$prv_key);
298 elseif(strlen($pub_key)) {
299 openssl_public_encrypt($hash,$challenge,$pub_key);
300 openssl_public_encrypt($id_str,$encrypted_id,$pub_key);
305 $challenge = bin2hex($challenge);
306 $encrypted_id = bin2hex($encrypted_id);
309 $rino = get_config('system','rino_encrypt');
310 $rino = intval($rino);
311 // use RINO1 if mcrypt isn't installed and RINO2 was selected
312 if ($rino==2 and !function_exists('mcrypt_create_iv')) $rino=1;
314 logger("Local rino version: ". $rino, LOGGER_DEBUG);
316 // if requested rino is lower than enabled local rino, lower local rino version
317 // if requested rino is higher than enabled local rino, reply with local rino
318 if ($rino_remote < $rino) $rino = $rino_remote;
320 if((($r[0]['rel']) && ($r[0]['rel'] != CONTACT_IS_SHARING)) || ($r[0]['page-flags'] == PAGE_COMMUNITY)) {
327 header("Content-type: text/xml");
329 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
330 . '<dfrn_notify>' . "\r\n"
331 . "\t" . '<status>' . $status . '</status>' . "\r\n"
332 . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
333 . "\t" . '<rino>' . $rino . '</rino>' . "\r\n"
334 . "\t" . '<perm>' . $perm . '</perm>' . "\r\n"
335 . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
336 . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
337 . '</dfrn_notify>' . "\r\n" ;