+ $direction = (-1);
+ if(strpos($dfrn_id,':') == 1) {
+ $direction = intval(substr($dfrn_id,0,1));
+ $dfrn_id = substr($dfrn_id,2);
+ }
+
+
+ $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
+ dbesc($dfrn_id),
+ dbesc($challenge)
+ );
+
+ if(! count($r))
+ killme();
+
+ $type = $r[0]['type'];
+ $last_update = $r[0]['last_update'];
+
+ $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s'",
+ dbesc($dfrn_id),
+ dbesc($challenge)
+ );
+
+
+ $sql_extra = '';
+ switch($direction) {
+ case (-1):
+ $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
+ $my_id = $dfrn_id;
+ break;
+ case 0:
+ $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
+ $my_id = '1:' . $dfrn_id;
+ break;
+ case 1:
+ $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
+ $my_id = '0:' . $dfrn_id;
+ break;
+ default:
+ goaway(z_root());
+ break; // NOTREACHED
+ }
+
+
+ $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
+
+
+ if(! count($r))
+ killme();
+
+ $contact = $r[0];
+ $owner_uid = $r[0]['uid'];
+ $contact_id = $r[0]['id'];
+
+
+ if($type === 'reputation' && strlen($url)) {
+ $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
+ dbesc($url),
+ intval($owner_uid)
+ );
+ $reputation = 0;
+ $text = '';
+
+ if(count($r)) {
+ $reputation = $r[0]['rating'];
+ $text = $r[0]['reason'];
+
+ if($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed
+ $reputation = 0;
+ $text = '';
+ }
+ }
+
+ echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
+ <reputation>
+ <url>$url</url>
+ <rating>$reputation</rating>
+ <description>$text</description>
+ </reputation>
+ ";
+ killme();
+ // NOTREACHED
+ }
+ else {
+
+ // Update the writable flag if it changed
+ logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
+ if($dfrn_version >= 2.21) {
+ if($perm === 'rw')
+ $writable = 1;
+ else
+ $writable = 0;
+
+ if($writable != $contact['writable']) {
+ q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d",
+ intval($writable),
+ intval($contact_id)
+ );
+ }
+ }
+
+ header("Content-type: application/atom+xml");
+ $o = dfrn::feed($dfrn_id, $a->argv[1], $last_update, $direction);
+ echo $o;
+ killme();
+
+ }
+}
+
+function dfrn_poll_content(&$a) {
+
+ $dfrn_id = ((x($_GET,'dfrn_id')) ? $_GET['dfrn_id'] : '');
+ $type = ((x($_GET,'type')) ? $_GET['type'] : 'data');
+ $last_update = ((x($_GET,'last_update')) ? $_GET['last_update'] : '');
+ $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : '');
+ $sec = ((x($_GET,'sec')) ? $_GET['sec'] : '');
+ $dfrn_version = ((x($_GET,'dfrn_version')) ? (float) $_GET['dfrn_version'] : 2.0);
+ $perm = ((x($_GET,'perm')) ? $_GET['perm'] : 'r');
+ $quiet = ((x($_GET,'quiet')) ? true : false);
+
+ $direction = (-1);
+ if(strpos($dfrn_id,':') == 1) {
+ $direction = intval(substr($dfrn_id,0,1));
+ $dfrn_id = substr($dfrn_id,2);
+ }
+
+
+ if($dfrn_id != '') {
+ // initial communication from external contact
+ $hash = random_string();
+
+ $status = 0;
+
+ $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
+
+ if($type !== 'profile') {
+ $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
+ VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
+ dbesc($hash),
+ dbesc($dfrn_id),
+ intval(time() + 60 ),
+ dbesc($type),
+ dbesc($last_update)
+ );
+ }
+ $sql_extra = '';
+ switch($direction) {
+ case (-1):
+ if($type === 'profile')
+ $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
+ else
+ $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
+ $my_id = $dfrn_id;
+ break;
+ case 0:
+ $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
+ $my_id = '1:' . $dfrn_id;
+ break;
+ case 1:
+ $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
+ $my_id = '0:' . $dfrn_id;
+ break;
+ default:
+ goaway(z_root());
+ break; // NOTREACHED
+ }
+
+ $nickname = $a->argv[1];
+
+ $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
+ FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
+ WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
+ AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
+ dbesc($nickname)
+ );
+
+ if(count($r)) {
+
+ $challenge = '';
+ $encrypted_id = '';
+ $id_str = $my_id . '.' . mt_rand(1000,9999);
+
+ if(($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) {
+ $s = fetch_url($r[0]['poll']
+ . '?dfrn_id=' . $encrypted_id
+ . '&type=profile-check'
+ . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
+ . '&challenge=' . $challenge
+ . '&sec=' . $sec
+ );
+ }
+ else {
+ $s = post_url($r[0]['poll'], array(
+ 'dfrn_id' => $encrypted_id,
+ 'type' => 'profile-check',
+ 'dfrn_version' => DFRN_PROTOCOL_VERSION,
+ 'challenge' => $challenge,
+ 'sec' => $sec
+ ));
+ }
+
+ $profile = ((count($r) && $r[0]['nickname']) ? $r[0]['nickname'] : $nickname);
+
+ switch($destination_url) {
+ case 'profile':
+ $dest = $a->get_baseurl() . '/profile/' . $profile . '?f=&tab=profile';
+ break;
+ case 'photos':
+ $dest = $a->get_baseurl() . '/photos/' . $profile;
+ break;
+ case 'status':
+ case '':
+ $dest = $a->get_baseurl() . '/profile/' . $profile;
+ break;
+ default:
+ $dest = $destination_url . '?f=&redir=1';
+ break;
+ }
+
+ logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
+
+ if(strlen($s) && strstr($s,'<?xml')) {
+
+ $xml = parse_xml_string($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'] = array();
+ $_SESSION['remote'][] = array('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'] = $r[0]['uid'];
+ if(!$quiet)
+ info( sprintf(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
+ }
+ }