+ $sec = ((x($_POST,'sec')) ? $_POST['sec'] : '');
+ $ptype = ((x($_POST,'type')) ? $_POST['type'] : '');
+ $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
+ $perm = ((x($_POST,'perm')) ? $_POST['perm'] : 'r');
+
+ if($ptype === 'profile-check') {
+
+ if((strlen($challenge)) && (strlen($sec))) {
+
+ logger('dfrn_poll: POST: profile-check');
+
+ q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
+ $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
+ dbesc($sec)
+ );
+ if(! count($r)) {
+ xml_status(3, 'No ticket');
+ // NOTREACHED
+ }
+ $orig_id = $r[0]['dfrn_id'];
+ if(strpos($orig_id, ':'))
+ $orig_id = substr($orig_id,2);
+
+ $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
+ intval($r[0]['cid'])
+ );
+ if(! count($c)) {
+ xml_status(3, 'No profile');
+ }
+ $contact = $c[0];
+
+ $sent_dfrn_id = hex2bin($dfrn_id);
+ $challenge = hex2bin($challenge);
+
+ $final_dfrn_id = '';
+
+ if(($contact['duplex']) && strlen($contact['prvkey'])) {
+ openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
+ openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
+ }
+ else {
+ openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
+ openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
+ }
+
+ $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
+
+ if(strpos($final_dfrn_id,':') == 1)
+ $final_dfrn_id = substr($final_dfrn_id,2);
+
+ if($final_dfrn_id != $orig_id) {
+ logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
+ // did not decode properly - cannot trust this site
+ xml_status(3, 'Bad decryption');
+ }
+
+ header("Content-type: text/xml");
+ echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
+ killme();
+ // NOTREACHED
+ }
+
+ }