]> git.mxchange.org Git - friendica.git/blobdiff - include/diaspora.php
Degrade priority step by step
[friendica.git] / include / diaspora.php
index 8640e2d6a7f47af735e64d944a5858540986f237..762018b170c4f1f9ec35ff498b143f319427b051 100644 (file)
@@ -4,15 +4,16 @@
  * @brief The implementation of the diaspora protocol
  *
  * The new protocol is described here: http://diaspora.github.io/diaspora_federation/index.html
- * Currently this implementation here interprets the old and the new protocol and sends the old one.
- * This will change in the future.
+ * This implementation here interprets the old and the new protocol and sends the new one.
+ * In the future we will remove most stuff from "valid_posting" and interpret only the new protocol.
  */
 
-use \Friendica\Core\Config;
+use Friendica\App;
+use Friendica\Core\Config;
 
 require_once 'include/items.php';
 require_once 'include/bb2diaspora.php';
-require_once 'include/Scrape.php';
+require_once 'include/probe.php';
 require_once 'include/Contact.php';
 require_once 'include/Photo.php';
 require_once 'include/socgraph.php';
@@ -187,7 +188,80 @@ class Diaspora {
        }
 
        /**
-        * @brief: Decodes incoming Diaspora message
+        * @brief: Decodes incoming Diaspora message in the new format
+        *
+        * @param array $importer Array of the importer user
+        * @param string $raw raw post message
+        *
+        * @return array
+        * 'message' -> decoded Diaspora XML message
+        * 'author' -> author diaspora handle
+        * 'key' -> author public key (converted to pkcs#8)
+        */
+       public static function decode_raw($importer, $raw) {
+               $data = json_decode($raw);
+
+               // Is it a private post? Then decrypt the outer Salmon
+               if (is_object($data)) {
+                       $encrypted_aes_key_bundle = base64_decode($data->aes_key);
+                       $ciphertext = base64_decode($data->encrypted_magic_envelope);
+
+                       $outer_key_bundle = '';
+                       @openssl_private_decrypt($encrypted_aes_key_bundle, $outer_key_bundle, $importer['prvkey']);
+                       $j_outer_key_bundle = json_decode($outer_key_bundle);
+
+                       if (!is_object($j_outer_key_bundle)) {
+                               logger('Outer Salmon did not verify. Discarding.');
+                               http_status_exit(400);
+                       }
+
+                       $outer_iv = base64_decode($j_outer_key_bundle->iv);
+                       $outer_key = base64_decode($j_outer_key_bundle->key);
+
+                       $xml = diaspora::aes_decrypt($outer_key, $outer_iv, $ciphertext);
+               } else {
+                       $xml = $raw;
+               }
+
+               $basedom = parse_xml_string($xml);
+
+               if (!is_object($basedom)) {
+                       logger('Received data does not seem to be an XML. Discarding.');
+                       http_status_exit(400);
+               }
+
+               $base = $basedom->children(NAMESPACE_SALMON_ME);
+
+               // Not sure if this cleaning is needed
+               $data = str_replace(array(" ", "\t", "\r", "\n"), array("", "", "", ""), $base->data);
+
+               // Build the signed data
+               $type = $base->data[0]->attributes()->type[0];
+               $encoding = $base->encoding;
+               $alg = $base->alg;
+               $signed_data = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg);
+
+               // This is the signature
+               $signature = base64url_decode($base->sig);
+
+               // Get the senders' public key
+               $key_id = $base->sig[0]->attributes()->key_id[0];
+               $author_addr = base64_decode($key_id);
+               $key = diaspora::key($author_addr);
+
+               $verify = rsa_verify($signed_data, $signature, $key);
+               if (!$verify) {
+                       logger('Message did not verify. Discarding.');
+                       http_status_exit(400);
+               }
+
+               return array('message' => (string)base64url_decode($base->data),
+                               'author' => unxmlify($author_addr),
+                               'key' => (string)$key);
+       }
+
+       /**
+        * @brief: Decodes incoming Diaspora message in the deprecated format
         *
         * @param array $importer Array of the importer user
         * @param string $xml urldecoded Diaspora salmon
@@ -202,9 +276,10 @@ class Diaspora {
                $public = false;
                $basedom = parse_xml_string($xml);
 
-               if (!is_object($basedom))
+               if (!is_object($basedom)) {
+                       logger("XML is not parseable.");
                        return false;
-
+               }
                $children = $basedom->children('https://joindiaspora.com/protocol');
 
                if ($children->header) {
@@ -333,19 +408,20 @@ class Diaspora {
                        return false;
                }
 
-               if (!self::valid_posting($msg, $fields)) {
+               if (!($postdata = self::valid_posting($msg))) {
                        logger("Invalid posting");
                        return false;
                }
 
+               $fields = $postdata['fields'];
+
                // Is it a an action (comment, like, ...) for our own post?
-               if (isset($fields->parent_guid)) {
+               if (isset($fields->parent_guid) && !$postdata["relayed"]) {
                        $guid = notags(unxmlify($fields->parent_guid));
-
                        $importer = self::importer_for_guid($guid);
                        if (is_array($importer)) {
                                logger("delivering to origin: ".$importer["name"]);
-                               $message_id = self::dispatch($importer, $msg);
+                               $message_id = self::dispatch($importer, $msg, $fields);
                                return $message_id;
                        }
                }
@@ -361,14 +437,14 @@ class Diaspora {
                if (dbm::is_result($r)) {
                        foreach ($r as $rr) {
                                logger("delivering to: ".$rr["username"]);
-                               self::dispatch($rr, $msg);
+                               self::dispatch($rr, $msg, $fields);
                        }
                } elseif (!Config::get('system', 'relay_subscribe', false)) {
-                       logger("Unwanted message from ".$sender." send by ".$_SERVER["REMOTE_ADDR"]." with ".$_SERVER["HTTP_USER_AGENT"].": ".print_r($msg, true), LOGGER_DEBUG);
+                       logger("Unwanted message from ".$msg["author"]." send by ".$_SERVER["REMOTE_ADDR"]." with ".$_SERVER["HTTP_USER_AGENT"].": ".print_r($msg, true), LOGGER_DEBUG);
                } else {
                        // Use a dummy importer to import the data for the public copy
                        $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
-                       $message_id = self::dispatch($importer, $msg);
+                       $message_id = self::dispatch($importer, $msg, $fields);
                }
 
                return $message_id;
@@ -379,18 +455,23 @@ class Diaspora {
         *
         * @param array $importer Array of the importer user
         * @param array $msg The post that will be dispatched
+        * @param object $fields SimpleXML object that contains the message
         *
         * @return int The message id of the generated message, "true" or "false" if there was an error
         */
-       public static function dispatch($importer, $msg) {
+       public static function dispatch($importer, $msg, $fields = null) {
 
                // The sender is the handle of the contact that sent the message.
                // This will often be different with relayed messages (for example "like" and "comment")
                $sender = $msg["author"];
 
-               if (!self::valid_posting($msg, $fields)) {
-                       logger("Invalid posting");
-                       return false;
+               // This is only needed for private postings since this is already done for public ones before
+               if (is_null($fields)) {
+                       if (!($postdata = self::valid_posting($msg))) {
+                               logger("Invalid posting");
+                               return false;
+                       }
+                       $fields = $postdata['fields'];
                }
 
                $type = $fields->getName();
@@ -452,11 +533,10 @@ class Diaspora {
         * It also does the conversion between the old and the new diaspora format.
         *
         * @param array $msg Array with the XML, the sender handle and the sender signature
-        * @param object $fields SimpleXML object that contains the posting when it is valid
         *
-        * @return bool Is the posting valid?
+        * @return bool|array If the posting is valid then an array with an SimpleXML object is returned
         */
-       private static function valid_posting($msg, &$fields) {
+       private static function valid_posting($msg) {
 
                $data = parse_xml_string($msg["message"], false);
 
@@ -497,38 +577,44 @@ class Diaspora {
                foreach ($element->children() AS $fieldname => $entry) {
                        if ($oldXML) {
                                // Translation for the old XML structure
-                               if ($fieldname == "diaspora_handle")
+                               if ($fieldname == "diaspora_handle") {
                                        $fieldname = "author";
-
-                               if ($fieldname == "participant_handles")
+                               }
+                               if ($fieldname == "participant_handles") {
                                        $fieldname = "participants";
-
+                               }
                                if (in_array($type, array("like", "participation"))) {
-                                       if ($fieldname == "target_type")
+                                       if ($fieldname == "target_type") {
                                                $fieldname = "parent_type";
+                                       }
                                }
-
-                               if ($fieldname == "sender_handle")
+                               if ($fieldname == "sender_handle") {
                                        $fieldname = "author";
-
-                               if ($fieldname == "recipient_handle")
+                               }
+                               if ($fieldname == "recipient_handle") {
                                        $fieldname = "recipient";
-
-                               if ($fieldname == "root_diaspora_id")
+                               }
+                               if ($fieldname == "root_diaspora_id") {
                                        $fieldname = "root_author";
-
+                               }
+                               if ($type == "status_message") {
+                                       if ($fieldname == "raw_message") {
+                                               $fieldname = "text";
+                                       }
+                               }
                                if ($type == "retraction") {
-                                       if ($fieldname == "post_guid")
+                                       if ($fieldname == "post_guid") {
                                                $fieldname = "target_guid";
-
-                                       if ($fieldname == "type")
+                                       }
+                                       if ($fieldname == "type") {
                                                $fieldname = "target_type";
+                                       }
                                }
                        }
 
-                       if (($fieldname == "author_signature") AND ($entry != ""))
+                       if (($fieldname == "author_signature") && ($entry != ""))
                                $author_signature = base64_decode($entry);
-                       elseif (($fieldname == "parent_author_signature") AND ($entry != ""))
+                       elseif (($fieldname == "parent_author_signature") && ($entry != ""))
                                $parent_author_signature = base64_decode($entry);
                        elseif (!in_array($fieldname, array("author_signature", "parent_author_signature", "target_author_signature"))) {
                                if ($signed_data != "") {
@@ -538,7 +624,7 @@ class Diaspora {
 
                                $signed_data .= $entry;
                        }
-                       if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) OR
+                       if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) ||
                                ($orig_type == "relayable_retraction"))
                                xml::copy($entry, $fields, $fieldname);
                }
@@ -551,9 +637,9 @@ class Diaspora {
                        }
 
                // Only some message types have signatures. So we quit here for the other types.
-               if (!in_array($type, array("comment", "message", "like")))
-                       return true;
-
+               if (!in_array($type, array("comment", "like"))) {
+                       return array("fields" => $fields, "relayed" => false);
+               }
                // No author_signature? This is a must, so we quit.
                if (!isset($author_signature)) {
                        logger("No author signature for type ".$type." - Message: ".$msg["message"], LOGGER_DEBUG);
@@ -561,12 +647,16 @@ class Diaspora {
                }
 
                if (isset($parent_author_signature)) {
+                       $relayed = true;
+
                        $key = self::key($msg["author"]);
 
                        if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256")) {
                                logger("No valid parent author signature for parent author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$parent_author_signature, LOGGER_DEBUG);
                                return false;
                        }
+               } else {
+                       $relayed = false;
                }
 
                $key = self::key($fields->author);
@@ -574,8 +664,9 @@ class Diaspora {
                if (!rsa_verify($signed_data, $author_signature, $key, "sha256")) {
                        logger("No valid author signature for author ".$fields->author. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$author_signature, LOGGER_DEBUG);
                        return false;
-               } else
-                       return true;
+               } else {
+                       return array("fields" => $fields, "relayed" => $relayed);
+               }
        }
 
        /**
@@ -604,7 +695,7 @@ class Diaspora {
         *
         * @return array the queried data
         */
-       private static function person_by_handle($handle) {
+       public static function person_by_handle($handle) {
 
                $r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
                        dbesc(NETWORK_DIASPORA),
@@ -623,13 +714,13 @@ class Diaspora {
                                $update = true;
                }
 
-               if (!$person OR $update) {
+               if (!$person || $update) {
                        logger("create or refresh", LOGGER_DEBUG);
                        $r = probe_url($handle, PROBE_DIASPORA);
 
                        // Note that Friendica contacts will return a "Diaspora person"
                        // if Diaspora connectivity is enabled on their server
-                       if ($r AND ($r["network"] === NETWORK_DIASPORA)) {
+                       if ($r && ($r["network"] === NETWORK_DIASPORA)) {
                                self::add_fcontact($r, $update);
                                $person = $r;
                        }
@@ -789,11 +880,14 @@ class Diaspora {
                if (dbm::is_result($r)) {
                        return $r[0];
                } else {
-                       // We haven't found it?
-                       // We use another function for it that will possibly create a contact entry
+                       /*
+                        * We haven't found it?
+                        * We use another function for it that will possibly create a contact entry.
+                        */
                        $cid = get_contact($handle, $uid);
 
                        if ($cid > 0) {
+                               /// @TODO Contact retrieval should be encapsulated into an "entity" class like `Contact`
                                $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1", intval($cid));
 
                                if (dbm::is_result($r)) {
@@ -828,9 +922,11 @@ class Diaspora {
         */
        private static function post_allow($importer, $contact, $is_comment = false) {
 
-               // perhaps we were already sharing with this person. Now they're sharing with us.
-               // That makes us friends.
-               // Normally this should have handled by getting a request - but this could get lost
+               /*
+                * Perhaps we were already sharing with this person. Now they're sharing with us.
+                * That makes us friends.
+                * Normally this should have handled by getting a request - but this could get lost
+                */
                if ($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
                        q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
                                intval(CONTACT_IS_FRIEND),
@@ -843,16 +939,19 @@ class Diaspora {
 
                // We don't seem to like that person
                if ($contact["blocked"] || $contact["readonly"] || $contact["archive"]) {
+                       // Maybe blocked, don't accept.
                        return false;
-               // We are following this person? Then it is okay
+               // We are following this person?
                } elseif (($contact["rel"] == CONTACT_IS_SHARING) || ($contact["rel"] == CONTACT_IS_FRIEND)) {
+                       // Yes, then it is fine.
                        return true;
-               // Is it a post to a community? That's good
+               // Is it a post to a community?
                } elseif (($contact["rel"] == CONTACT_IS_FOLLOWER) && ($importer["page-flags"] == PAGE_COMMUNITY)) {
+                       // That's good
                        return true;
-               }
-               // Messages for the global users and comments are always accepted
-               if (($importer["uid"] == 0) || $is_comment) {
+               // Is the message a global user or a comment?
+               } elseif (($importer["uid"] == 0) || $is_comment) {
+                       // Messages for the global users and comments are always accepted
                        return true;
                }
 
@@ -1052,7 +1151,7 @@ class Diaspora {
                // Fetch the author - for the old and the new Diaspora version
                if ($source_xml->post->status_message->diaspora_handle)
                        $author = (string)$source_xml->post->status_message->diaspora_handle;
-               elseif ($source_xml->author AND ($source_xml->getName() == "status_message"))
+               elseif ($source_xml->author && ($source_xml->getName() == "status_message"))
                        $author = (string)$source_xml->author;
 
                // If this isn't a "status_message" then quit
@@ -1279,10 +1378,10 @@ class Diaspora {
         * @return int The message id of the generated comment or "false" if there was an error
         */
        private static function receive_comment($importer, $sender, $data, $xml) {
+               $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
                $parent_guid = notags(unxmlify($data->parent_guid));
                $text = unxmlify($data->text);
-               $author = notags(unxmlify($data->author));
 
                if (isset($data->created_at)) {
                        $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
@@ -1304,7 +1403,7 @@ class Diaspora {
 
                $message_id = self::message_exists($importer["uid"], $guid);
                if ($message_id) {
-                       return $message_id;
+                       return true;
                }
 
                $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
@@ -1363,12 +1462,16 @@ class Diaspora {
 
                $message_id = item_store($datarray);
 
+               if ($message_id <= 0) {
+                       return false;
+               }
+
                if ($message_id) {
                        logger("Stored comment ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
                }
 
                // If we are the origin of the parent we store the original data and notify our followers
-               if ($message_id AND $parent_item["origin"]) {
+               if ($message_id && $parent_item["origin"]) {
 
                        // Formerly we stored the signed text, the signature and the author in different fields.
                        // We now store the raw data so that we are more flexible.
@@ -1381,7 +1484,7 @@ class Diaspora {
                        proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $message_id);
                }
 
-               return $message_id;
+               return true;
        }
 
        /**
@@ -1397,16 +1500,9 @@ class Diaspora {
         * @return bool "true" if it was successful
         */
        private static function receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation) {
+               $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
                $subject = notags(unxmlify($data->subject));
-               $author = notags(unxmlify($data->author));
-
-               $msg_guid = notags(unxmlify($mesg->guid));
-               $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
-               $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
-               $msg_author_signature = notags(unxmlify($mesg->author_signature));
-               $msg_text = unxmlify($mesg->text);
-               $msg_created_at = datetime_convert("UTC", "UTC", notags(unxmlify($mesg->created_at)));
 
                // "diaspora_handle" is the element name from the old version
                // "author" is the element name from the new version
@@ -1418,7 +1514,10 @@ class Diaspora {
                        return false;
                }
 
+               $msg_guid = notags(unxmlify($mesg->guid));
                $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
+               $msg_text = unxmlify($mesg->text);
+               $msg_created_at = datetime_convert("UTC", "UTC", notags(unxmlify($mesg->created_at)));
 
                if ($msg_conversation_guid != $guid) {
                        logger("message conversation guid does not belong to the current conversation.");
@@ -1428,44 +1527,11 @@ class Diaspora {
                $body = diaspora2bb($msg_text);
                $message_uri = $msg_author.":".$msg_guid;
 
-               $author_signed_data = $msg_guid.";".$msg_parent_guid.";".$msg_text.";".unxmlify($mesg->created_at).";".$msg_author.";".$msg_conversation_guid;
-
-               $author_signature = base64_decode($msg_author_signature);
-
-               if (strcasecmp($msg_author,$msg["author"]) == 0) {
-                       $person = $contact;
-                       $key = $msg["key"];
-               } else {
-                       $person = self::person_by_handle($msg_author);
-
-                       if (is_array($person) && x($person, "pubkey")) {
-                               $key = $person["pubkey"];
-                       } else {
-                               logger("unable to find author details");
-                                       return false;
-                       }
-               }
+               $person = self::person_by_handle($msg_author);
 
-               if (!rsa_verify($author_signed_data, $author_signature, $key, "sha256")) {
-                       logger("verification failed.");
-                       return false;
-               }
-
-               if ($msg_parent_author_signature) {
-                       $owner_signed_data = $msg_guid.";".$msg_parent_guid.";".$msg_text.";".unxmlify($mesg->created_at).";".$msg_author.";".$msg_conversation_guid;
-
-                       $parent_author_signature = base64_decode($msg_parent_author_signature);
-
-                       $key = $msg["key"];
-
-                       if (!rsa_verify($owner_signed_data, $parent_author_signature, $key, "sha256")) {
-                               logger("owner verification failed.");
-                               return false;
-                       }
-               }
-
-               $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' LIMIT 1",
-                       dbesc($message_uri)
+               $r = q("SELECT `id` FROM `mail` WHERE `guid` = '%s' AND `uid` = %d LIMIT 1",
+                       dbesc($msg_guid),
+                       intval($importer["uid"])
                );
                if (dbm::is_result($r)) {
                        logger("duplicate message already delivered.", LOGGER_DEBUG);
@@ -1522,10 +1588,10 @@ class Diaspora {
         * @return bool Success
         */
        private static function receive_conversation($importer, $msg, $data) {
+               $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
                $subject = notags(unxmlify($data->subject));
                $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
-               $author = notags(unxmlify($data->author));
                $participants = notags(unxmlify($data->participants));
 
                $messages = $data->message;
@@ -1569,7 +1635,7 @@ class Diaspora {
                }
                if (!$conversation) {
                        logger("unable to create conversation.");
-                       return;
+                       return false;
                }
 
                foreach ($messages as $mesg)
@@ -1630,11 +1696,11 @@ class Diaspora {
         * @return int The message id of the generated like or "false" if there was an error
         */
        private static function receive_like($importer, $sender, $data) {
-               $positive = notags(unxmlify($data->positive));
+               $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
-               $parent_type = notags(unxmlify($data->parent_type));
                $parent_guid = notags(unxmlify($data->parent_guid));
-               $author = notags(unxmlify($data->author));
+               $parent_type = notags(unxmlify($data->parent_type));
+               $positive = notags(unxmlify($data->positive));
 
                // likes on comments aren't supported by Diaspora - only on posts
                // But maybe this will be supported in the future, so we will accept it.
@@ -1647,7 +1713,7 @@ class Diaspora {
 
                $message_id = self::message_exists($importer["uid"], $guid);
                if ($message_id)
-                       return $message_id;
+                       return true;
 
                $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
                if (!$parent_item)
@@ -1700,11 +1766,16 @@ class Diaspora {
 
                $message_id = item_store($datarray);
 
-               if ($message_id)
+               if ($message_id <= 0) {
+                       return false;
+               }
+
+               if ($message_id) {
                        logger("Stored like ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
+               }
 
                // If we are the origin of the parent we store the original data and notify our followers
-               if ($message_id AND $parent_item["origin"]) {
+               if ($message_id && $parent_item["origin"]) {
 
                        // Formerly we stored the signed text, the signature and the author in different fields.
                        // We now store the raw data so that we are more flexible.
@@ -1717,7 +1788,7 @@ class Diaspora {
                        proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $message_id);
                }
 
-               return $message_id;
+               return true;
        }
 
        /**
@@ -1729,12 +1800,11 @@ class Diaspora {
         * @return bool Success?
         */
        private static function receive_message($importer, $data) {
+               $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
-               $parent_guid = notags(unxmlify($data->parent_guid));
+               $conversation_guid = notags(unxmlify($data->conversation_guid));
                $text = unxmlify($data->text);
                $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
-               $author = notags(unxmlify($data->author));
-               $conversation_guid = notags(unxmlify($data->conversation_guid));
 
                $contact = self::allowed_contact_by_handle($importer, $author, true);
                if (!$contact) {
@@ -1762,8 +1832,8 @@ class Diaspora {
                        return false;
                }
 
-               $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
-                       dbesc($message_uri),
+               $r = q("SELECT `id` FROM `mail` WHERE `guid` = '%s' AND `uid` = %d LIMIT 1",
+                       dbesc($guid),
                        intval($importer["uid"])
                );
                if (dbm::is_result($r)) {
@@ -1789,7 +1859,7 @@ class Diaspora {
                        0,
                        1,
                        dbesc($message_uri),
-                       dbesc($author.":".$parent_guid),
+                       dbesc($author.":".$conversation["guid"]),
                        dbesc($created_at)
                );
 
@@ -1858,9 +1928,9 @@ class Diaspora {
                $name = unxmlify($data->first_name).((strlen($data->last_name)) ? " ".unxmlify($data->last_name) : "");
                $image_url = unxmlify($data->image_url);
                $birthday = unxmlify($data->birthday);
-               $location = diaspora2bb(unxmlify($data->location));
-               $about = diaspora2bb(unxmlify($data->bio));
                $gender = unxmlify($data->gender);
+               $about = diaspora2bb(unxmlify($data->bio));
+               $location = diaspora2bb(unxmlify($data->location));
                $searchable = (unxmlify($data->searchable) == "true");
                $nsfw = (unxmlify($data->nsfw) == "true");
                $tags = unxmlify($data->tag_string);
@@ -2054,7 +2124,7 @@ class Diaspora {
                // perhaps we were already sharing with this person. Now they're sharing with us.
                // That makes us friends.
                if ($contact) {
-                       if ($following AND $sharing) {
+                       if ($following && $sharing) {
                                logger("Author ".$author." (Contact ".$contact["id"].") wants to have a bidirectional conection.", LOGGER_DEBUG);
                                self::receive_request_make_friend($importer, $contact);
 
@@ -2077,17 +2147,17 @@ class Diaspora {
                        }
                }
 
-               if (!$following AND $sharing AND in_array($importer["page-flags"], array(PAGE_SOAPBOX, PAGE_NORMAL))) {
+               if (!$following && $sharing && in_array($importer["page-flags"], array(PAGE_SOAPBOX, PAGE_NORMAL))) {
                        logger("Author ".$author." wants to share with us - but doesn't want to listen. Request is ignored.", LOGGER_DEBUG);
                        return false;
-               } elseif (!$following AND !$sharing) {
+               } elseif (!$following && !$sharing) {
                        logger("Author ".$author." doesn't want anything - and we don't know the author. Request is ignored.", LOGGER_DEBUG);
                        return false;
-               } elseif (!$following AND $sharing) {
+               } elseif (!$following && $sharing) {
                        logger("Author ".$author." wants to share with us.", LOGGER_DEBUG);
-               } elseif ($following AND $sharing) {
+               } elseif ($following && $sharing) {
                        logger("Author ".$author." wants to have a bidirectional conection.", LOGGER_DEBUG);
-               } elseif ($following AND !$sharing) {
+               } elseif ($following && !$sharing) {
                        logger("Author ".$author." wants to listen to us.", LOGGER_DEBUG);
                }
 
@@ -2165,9 +2235,9 @@ class Diaspora {
                        // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
                        // we are going to change the relationship and make them a follower.
 
-                       if (($importer["page-flags"] == PAGE_FREELOVE) AND $sharing AND $following)
+                       if (($importer["page-flags"] == PAGE_FREELOVE) && $sharing && $following)
                                $new_relation = CONTACT_IS_FRIEND;
-                       elseif (($importer["page-flags"] == PAGE_FREELOVE) AND $sharing)
+                       elseif (($importer["page-flags"] == PAGE_FREELOVE) && $sharing)
                                $new_relation = CONTACT_IS_SHARING;
                        else
                                $new_relation = CONTACT_IS_FOLLOWER;
@@ -2280,12 +2350,13 @@ class Diaspora {
         * @return int the message id
         */
        private static function receive_reshare($importer, $data, $xml) {
+               $author = notags(unxmlify($data->author));
+               $guid = notags(unxmlify($data->guid));
+               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
                $root_author = notags(unxmlify($data->root_author));
                $root_guid = notags(unxmlify($data->root_guid));
-               $guid = notags(unxmlify($data->guid));
-               $author = notags(unxmlify($data->author));
+               /// @todo handle unprocessed property "provider_display_name"
                $public = notags(unxmlify($data->public));
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
 
                $contact = self::allowed_contact_by_handle($importer, $author, false);
                if (!$contact) {
@@ -2294,7 +2365,7 @@ class Diaspora {
 
                $message_id = self::message_exists($importer["uid"], $guid);
                if ($message_id) {
-                       return $message_id;
+                       return true;
                }
 
                $original_item = self::original_item($root_guid, $root_author, $author);
@@ -2345,9 +2416,10 @@ class Diaspora {
 
                if ($message_id) {
                        logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
+                       return true;
+               } else {
+                       return false;
                }
-
-               return $message_id;
        }
 
        /**
@@ -2360,9 +2432,9 @@ class Diaspora {
         * @return bool success
         */
        private static function item_retraction($importer, $contact, $data) {
-               $target_type = notags(unxmlify($data->target_type));
-               $target_guid = notags(unxmlify($data->target_guid));
                $author = notags(unxmlify($data->author));
+               $target_guid = notags(unxmlify($data->target_guid));
+               $target_type = notags(unxmlify($data->target_type));
 
                $person = self::person_by_handle($author);
                if (!is_array($person)) {
@@ -2370,11 +2442,16 @@ class Diaspora {
                        return false;
                }
 
+               if (!isset($contact["url"])) {
+                       $contact["url"] = $person["url"];
+               }
+
                $r = q("SELECT `id`, `parent`, `parent-uri`, `author-link` FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1",
                        dbesc($target_guid),
                        intval($importer["uid"])
                );
                if (!$r) {
+                       logger("Target guid ".$target_guid." was not found for user ".$importer["uid"]);
                        return false;
                }
 
@@ -2383,7 +2460,7 @@ class Diaspora {
                        intval($r[0]["parent"]));
 
                // Only delete it if the parent author really fits
-               if (!link_compare($p[0]["author-link"], $contact["url"]) AND !link_compare($r[0]["author-link"], $contact["url"])) {
+               if (!link_compare($p[0]["author-link"], $contact["url"]) && !link_compare($r[0]["author-link"], $contact["url"])) {
                        logger("Thread author ".$p[0]["author-link"]." and item author ".$r[0]["author-link"]." don't fit to expected contact ".$contact["url"], LOGGER_DEBUG);
                        return false;
                }
@@ -2420,7 +2497,7 @@ class Diaspora {
                $target_type = notags(unxmlify($data->target_type));
 
                $contact = self::contact_by_handle($importer["uid"], $sender);
-               if (!$contact) {
+               if (!$contact && (in_array($target_type, array("Contact", "Person")))) {
                        logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
                        return false;
                }
@@ -2430,10 +2507,10 @@ class Diaspora {
                switch ($target_type) {
                        case "Comment":
                        case "Like":
-                       case "Post": // "Post" will be supported in a future version
+                       case "Post":
                        case "Reshare":
                        case "StatusMessage":
-                               return self::item_retraction($importer, $contact, $data);;
+                               return self::item_retraction($importer, $contact, $data);
 
                        case "Contact":
                        case "Person":
@@ -2459,19 +2536,13 @@ class Diaspora {
         * @return int The message id of the newly created item
         */
        private static function receive_status_message($importer, $data, $xml) {
-               $raw_message = unxmlify($data->raw_message);
-               $guid = notags(unxmlify($data->guid));
                $author = notags(unxmlify($data->author));
-               $public = notags(unxmlify($data->public));
+               $guid = notags(unxmlify($data->guid));
                $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $public = notags(unxmlify($data->public));
+               $text = unxmlify($data->text);
                $provider_display_name = notags(unxmlify($data->provider_display_name));
 
-               /// @todo enable support for polls
-               //if ($data->poll) {
-               //      foreach ($data->poll AS $poll)
-               //              print_r($poll);
-               //      die("poll!\n");
-               //}
                $contact = self::allowed_contact_by_handle($importer, $author, false);
                if (!$contact) {
                        return false;
@@ -2479,7 +2550,7 @@ class Diaspora {
 
                $message_id = self::message_exists($importer["uid"], $guid);
                if ($message_id) {
-                       return $message_id;
+                       return true;
                }
 
                $address = array();
@@ -2489,7 +2560,7 @@ class Diaspora {
                        }
                }
 
-               $body = diaspora2bb($raw_message);
+               $body = diaspora2bb($text);
 
                $datarray = array();
 
@@ -2510,6 +2581,15 @@ class Diaspora {
                        }
                }
 
+               /// @todo enable support for polls
+               //if ($data->poll) {
+               //      foreach ($data->poll AS $poll)
+               //              print_r($poll);
+               //      die("poll!\n");
+               //}
+
+               /// @todo enable support for events
+
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $contact["id"];
                $datarray["network"] = NETWORK_DIASPORA;
@@ -2545,7 +2625,7 @@ class Diaspora {
                        $datarray["location"] = $address["address"];
                }
 
-               if (isset($address["lat"]) AND isset($address["lng"])) {
+               if (isset($address["lat"]) && isset($address["lng"])) {
                        $datarray["coord"] = $address["lat"]." ".$address["lng"];
                }
 
@@ -2554,9 +2634,10 @@ class Diaspora {
 
                if ($message_id) {
                        logger("Stored item ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
+                       return true;
+               } else {
+                       return false;
                }
-
-               return $message_id;
        }
 
        /* ************************************************************************************** *
@@ -2586,42 +2667,9 @@ class Diaspora {
                return $nick."@".substr(App::get_baseurl(), strpos(App::get_baseurl(),"://") + 3);
        }
 
-       /**
-        * @brief Creates the envelope for the "fetch" endpoint
-        *
-        * @param string $msg The message that is to be transmitted
-        * @param array $user The record of the sender
-        *
-        * @return string The envelope
-        */
-
-       public static function build_magic_envelope($msg, $user) {
-
-               $b64url_data = base64url_encode($msg);
-               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
-
-               $key_id = base64url_encode(self::my_handle($user));
-               $type = "application/xml";
-               $encoding = "base64url";
-               $alg = "RSA-SHA256";
-               $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
-               $signature = rsa_sign($signable_data, $user["prvkey"]);
-               $sig = base64url_encode($signature);
-
-               $xmldata = array("me:env" => array("me:data" => $data,
-                                                       "@attributes" => array("type" => $type),
-                                                       "me:encoding" => $encoding,
-                                                       "me:alg" => $alg,
-                                                       "me:sig" => $sig,
-                                                       "@attributes2" => array("key_id" => $key_id)));
-
-               $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
-
-               return xml::from_array($xmldata, $xml, false, $namespaces);
-       }
 
        /**
-        * @brief Creates the envelope for a public message
+        * @brief Creates the data for a private message in the new format
         *
         * @param string $msg The message that is to be transmitted
         * @param array $user The record of the sender
@@ -2629,129 +2677,72 @@ class Diaspora {
         * @param string $prvkey The private key of the sender
         * @param string $pubkey The public key of the receiver
         *
-        * @return string The envelope
+        * @return string The encrypted data
         */
-       private static function build_public_message($msg, $user, $contact, $prvkey, $pubkey) {
+       public static function encode_private_data($msg, $user, $contact, $prvkey, $pubkey) {
 
                logger("Message: ".$msg, LOGGER_DATA);
 
-               $handle = self::my_handle($user);
-
-               $b64url_data = base64url_encode($msg);
-
-               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
-
-               $type = "application/xml";
-               $encoding = "base64url";
-               $alg = "RSA-SHA256";
+               // without a public key nothing will work
+               if (!$pubkey) {
+                       logger("pubkey missing: contact id: ".$contact["id"]);
+                       return false;
+               }
 
-               $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
+               $aes_key = openssl_random_pseudo_bytes(32);
+               $b_aes_key = base64_encode($aes_key);
+               $iv = openssl_random_pseudo_bytes(16);
+               $b_iv = base64_encode($iv);
 
-               $signature = rsa_sign($signable_data,$prvkey);
-               $sig = base64url_encode($signature);
+               $ciphertext = self::aes_encrypt($aes_key, $iv, $msg);
 
-               $xmldata = array("diaspora" => array("header" => array("author_id" => $handle),
-                                                       "me:env" => array("me:encoding" => $encoding,
-                                                       "me:alg" => $alg,
-                                                       "me:data" => $data,
-                                                       "@attributes" => array("type" => $type),
-                                                       "me:sig" => $sig)));
+               $json = json_encode(array("iv" => $b_iv, "key" => $b_aes_key));
 
-               $namespaces = array("" => "https://joindiaspora.com/protocol",
-                               "me" => "http://salmon-protocol.org/ns/magic-env");
+               $encrypted_key_bundle = "";
+               openssl_public_encrypt($json, $encrypted_key_bundle, $pubkey);
 
-               $magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
+               $json_object = json_encode(array("aes_key" => base64_encode($encrypted_key_bundle),
+                                               "encrypted_magic_envelope" => base64_encode($ciphertext)));
 
-               logger("magic_env: ".$magic_env, LOGGER_DATA);
-               return $magic_env;
+               return $json_object;
        }
 
        /**
-        * @brief Creates the envelope for a private message
+        * @brief Creates the envelope for the "fetch" endpoint and for the new format
         *
         * @param string $msg The message that is to be transmitted
         * @param array $user The record of the sender
-        * @param array $contact Target of the communication
-        * @param string $prvkey The private key of the sender
-        * @param string $pubkey The public key of the receiver
         *
         * @return string The envelope
         */
-       private static function build_private_message($msg, $user, $contact, $prvkey, $pubkey) {
-
-               logger("Message: ".$msg, LOGGER_DATA);
-
-               // without a public key nothing will work
-
-               if (!$pubkey) {
-                       logger("pubkey missing: contact id: ".$contact["id"]);
-                       return false;
-               }
-
-               $inner_aes_key = openssl_random_pseudo_bytes(32);
-               $b_inner_aes_key = base64_encode($inner_aes_key);
-               $inner_iv = openssl_random_pseudo_bytes(16);
-               $b_inner_iv = base64_encode($inner_iv);
-
-               $outer_aes_key = openssl_random_pseudo_bytes(32);
-               $b_outer_aes_key = base64_encode($outer_aes_key);
-               $outer_iv = openssl_random_pseudo_bytes(16);
-               $b_outer_iv = base64_encode($outer_iv);
-
-               $handle = self::my_handle($user);
-
-               $inner_encrypted = self::aes_encrypt($inner_aes_key, $inner_iv, $msg);
-
-               $b64_data = base64_encode($inner_encrypted);
-
+       public static function build_magic_envelope($msg, $user) {
 
-               $b64url_data = base64url_encode($b64_data);
+               $b64url_data = base64url_encode($msg);
                $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
 
+               $key_id = base64url_encode(self::my_handle($user));
                $type = "application/xml";
                $encoding = "base64url";
                $alg = "RSA-SHA256";
-
                $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
 
-               $signature = rsa_sign($signable_data,$prvkey);
-               $sig = base64url_encode($signature);
-
-               $xmldata = array("decrypted_header" => array("iv" => $b_inner_iv,
-                                                       "aes_key" => $b_inner_aes_key,
-                                                       "author_id" => $handle));
-
-               $decrypted_header = xml::from_array($xmldata, $xml, true);
-
-               $ciphertext = self::aes_encrypt($outer_aes_key, $outer_iv, $decrypted_header);
-
-               $outer_json = json_encode(array("iv" => $b_outer_iv, "key" => $b_outer_aes_key));
-
-               $encrypted_outer_key_bundle = "";
-               openssl_public_encrypt($outer_json, $encrypted_outer_key_bundle, $pubkey);
-
-               $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
-
-               logger("outer_bundle: ".$b64_encrypted_outer_key_bundle." key: ".$pubkey, LOGGER_DATA);
-
-               $encrypted_header_json_object = json_encode(array("aes_key" => base64_encode($encrypted_outer_key_bundle),
-                                                               "ciphertext" => base64_encode($ciphertext)));
-               $cipher_json = base64_encode($encrypted_header_json_object);
+               // Fallback if the private key wasn't transmitted in the expected field
+               if ($user['uprvkey'] == "")
+                       $user['uprvkey'] = $user['prvkey'];
 
-               $xmldata = array("diaspora" => array("encrypted_header" => $cipher_json,
-                                               "me:env" => array("me:encoding" => $encoding,
-                                                               "me:alg" => $alg,
-                                                               "me:data" => $data,
-                                                               "@attributes" => array("type" => $type),
-                                                               "me:sig" => $sig)));
+               $signature = rsa_sign($signable_data, $user["uprvkey"]);
+               $sig = base64url_encode($signature);
 
-               $namespaces = array("" => "https://joindiaspora.com/protocol",
-                               "me" => "http://salmon-protocol.org/ns/magic-env");
+               $xmldata = array("me:env" => array("me:data" => $data,
+                                                       "@attributes" => array("type" => $type),
+                                                       "me:encoding" => $encoding,
+                                                       "me:alg" => $alg,
+                                                       "me:sig" => $sig,
+                                                       "@attributes2" => array("key_id" => $key_id)));
 
-               $magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
+               $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
 
-               logger("magic_env: ".$magic_env, LOGGER_DATA);
-               return $magic_env;
+               return xml::from_array($xmldata, $xml, false, $namespaces);
        }
 
        /**
@@ -2768,14 +2759,15 @@ class Diaspora {
         */
        private static function build_message($msg, $user, $contact, $prvkey, $pubkey, $public = false) {
 
-               if ($public)
-                       $magic_env =  self::build_public_message($msg,$user,$contact,$prvkey,$pubkey);
-               else
-                       $magic_env =  self::build_private_message($msg,$user,$contact,$prvkey,$pubkey);
+               // The message is put into an envelope with the sender's signature
+               $envelope = self::build_magic_envelope($msg, $user);
+
+               // Private messages are put into a second envelope, encrypted with the receivers public key
+               if (!$public) {
+                       $envelope = self::encode_private_data($envelope, $user, $contact, $prvkey, $pubkey);
+               }
 
-               // The data that will be transmitted is double encoded via "urlencode", strange ...
-               $slap = "xml=".urlencode(urlencode($magic_env));
-               return $slap;
+               return $envelope;
        }
 
        /**
@@ -2801,14 +2793,14 @@ class Diaspora {
         *
         * @param array $owner the array of the item owner
         * @param array $contact Target of the communication
-        * @param string $slap The message that is to be transmitted
+        * @param string $envelope The message that is to be transmitted
         * @param bool $public_batch Is it a public post?
         * @param bool $queue_run Is the transmission called from the queue?
         * @param string $guid message guid
         *
         * @return int Result of the transmission
         */
-       public static function transmit($owner, $contact, $slap, $public_batch, $queue_run=false, $guid = "") {
+       public static function transmit($owner, $contact, $envelope, $public_batch, $queue_run=false, $guid = "") {
 
                $a = get_app();
 
@@ -2829,7 +2821,9 @@ class Diaspora {
                        $return_code = 0;
                } else {
                        if (!intval(get_config("system", "diaspora_test"))) {
-                               post_url($dest_url."/", $slap);
+                               $content_type = (($public_batch) ? "application/magic-envelope+xml" : "application/json");
+
+                               post_url($dest_url."/", $envelope, array("Content-Type: ".$content_type));
                                $return_code = $a->get_curl_code();
                        } else {
                                logger("test_mode");
@@ -2845,19 +2839,19 @@ class Diaspora {
                        $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1",
                                intval($contact["id"]),
                                dbesc(NETWORK_DIASPORA),
-                               dbesc($slap),
+                               dbesc($envelope),
                                intval($public_batch)
                        );
                        if ($r) {
                                logger("add_to_queue ignored - identical item already in queue");
                        } else {
                                // queue message for redelivery
-                               add_to_queue($contact["id"], NETWORK_DIASPORA, $slap, $public_batch);
+                               add_to_queue($contact["id"], NETWORK_DIASPORA, $envelope, $public_batch);
 
                                // The message could not be delivered. We mark the contact as "dead"
                                mark_for_death($contact);
                        }
-               } elseif (($return_code >= 200) AND ($return_code <= 299)) {
+               } elseif (($return_code >= 200) && ($return_code <= 299)) {
                        // We successfully delivered a message, the contact is alive
                        unmark_for_death($contact);
                }
@@ -2876,7 +2870,8 @@ class Diaspora {
         */
        public static function build_post_xml($type, $message) {
 
-               $data = array("XML" => array("post" => array($type => $message)));
+               $data = array($type => $message);
+
                return xml::from_array($data, $xml);
        }
 
@@ -2904,13 +2899,13 @@ class Diaspora {
                if ($owner['uprvkey'] == "")
                        $owner['uprvkey'] = $owner['prvkey'];
 
-               $slap = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
+               $envelope = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
 
                if ($spool) {
-                       add_to_queue($contact['id'], NETWORK_DIASPORA, $slap, $public_batch);
+                       add_to_queue($contact['id'], NETWORK_DIASPORA, $envelope, $public_batch);
                        return true;
                } else
-                       $return_code = self::transmit($owner, $contact, $slap, $public_batch, false, $guid);
+                       $return_code = self::transmit($owner, $contact, $envelope, $public_batch, false, $guid);
 
                logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG);
 
@@ -2925,14 +2920,37 @@ class Diaspora {
         *
         * @return int The result of the transmission
         */
-       public static function send_share($owner,$contact) {
-
-               $message = array("sender_handle" => self::my_handle($owner),
-                               "recipient_handle" => $contact["addr"]);
+       public static function send_share($owner, $contact) {
+
+               /**
+                * @todo support the different possible combinations of "following" and "sharing"
+                * Currently, Diaspora only interprets the "sharing" field
+                *
+                * Before switching this code productive, we have to check all "send_share" calls if "rel" is set correctly
+                */
+
+               /*
+               switch ($contact["rel"]) {
+                       case CONTACT_IS_FRIEND:
+                               $following = true;
+                               $sharing = true;
+                       case CONTACT_IS_SHARING:
+                               $following = false;
+                               $sharing = true;
+                       case CONTACT_IS_FOLLOWER:
+                               $following = true;
+                               $sharing = false;
+               }
+               */
+
+               $message = array("author" => self::my_handle($owner),
+                               "recipient" => $contact["addr"],
+                               "following" => "true",
+                               "sharing" => "true");
 
                logger("Send share ".print_r($message, true), LOGGER_DEBUG);
 
-               return self::build_and_transmit($owner, $contact, "request", $message);
+               return self::build_and_transmit($owner, $contact, "contact", $message);
        }
 
        /**
@@ -2943,15 +2961,16 @@ class Diaspora {
         *
         * @return int The result of the transmission
         */
-       public static function send_unshare($owner,$contact) {
+       public static function send_unshare($owner, $contact) {
 
-               $message = array("post_guid" => $owner["guid"],
-                               "diaspora_handle" => self::my_handle($owner),
-                               "type" => "Person");
+               $message = array("author" => self::my_handle($owner),
+                               "recipient" => $contact["addr"],
+                               "following" => "false",
+                               "sharing" => "false");
 
                logger("Send unshare ".print_r($message, true), LOGGER_DEBUG);
 
-               return self::build_and_transmit($owner, $contact, "retraction", $message);
+               return self::build_and_transmit($owner, $contact, "contact", $message);
        }
 
        /**
@@ -2967,7 +2986,7 @@ class Diaspora {
 
                // Skip if it isn't a pure repeated messages
                // Does it start with a share?
-               if ((strpos($body, "[share") > 0) AND $complete)
+               if ((strpos($body, "[share") > 0) && $complete)
                        return(false);
 
                // Does it end with a share?
@@ -3015,7 +3034,7 @@ class Diaspora {
                $ret= array();
 
                $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
-               if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
+               if (($ret["root_handle"] == $profile) || ($ret["root_handle"] == ""))
                        return(false);
 
                $link = "";
@@ -3028,7 +3047,7 @@ class Diaspora {
                        $link = $matches[1];
 
                $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
-               if (($ret["root_guid"] == $link) OR (trim($ret["root_guid"]) == ""))
+               if (($ret["root_guid"] == $link) || (trim($ret["root_guid"]) == ""))
                        return(false);
 
                return($ret);
@@ -3088,7 +3107,7 @@ class Diaspora {
                if ($event['start']) {
                        $eventdata['start'] = datetime_convert($eventdata['timezone'], "UTC", $event['start'], $mask);
                }
-               if ($event['finish'] AND !$event['nofinish']) {
+               if ($event['finish'] && !$event['nofinish']) {
                        $eventdata['end'] = datetime_convert($eventdata['timezone'], "UTC", $event['finish'], $mask);
                }
                if ($event['summary']) {
@@ -3134,14 +3153,14 @@ class Diaspora {
                $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
 
                // Detect a share element and do a reshare
-               if (!$item['private'] AND ($ret = self::is_reshare($item["body"]))) {
-                       $message = array("root_diaspora_id" => $ret["root_handle"],
-                                       "root_guid" => $ret["root_guid"],
+               if (!$item['private'] && ($ret = self::is_reshare($item["body"]))) {
+                       $message = array("author" => $myaddr,
                                        "guid" => $item["guid"],
-                                       "diaspora_handle" => $myaddr,
-                                       "public" => $public,
                                        "created_at" => $created,
-                                       "provider_display_name" => $item["app"]);
+                                       "root_author" => $ret["root_handle"],
+                                       "root_guid" => $ret["root_guid"],
+                                       "provider_display_name" => $item["app"],
+                                       "public" => $public);
 
                        $type = "reshare";
                } else {
@@ -3175,16 +3194,16 @@ class Diaspora {
                                $location["lng"] = $coord[1];
                        }
 
-                       $message = array("raw_message" => $body,
-                                       "location" => $location,
+                       $message = array("author" => $myaddr,
                                        "guid" => $item["guid"],
-                                       "diaspora_handle" => $myaddr,
-                                       "public" => $public,
                                        "created_at" => $created,
-                                       "provider_display_name" => $item["app"]);
+                                       "public" => $public,
+                                       "text" => $body,
+                                       "provider_display_name" => $item["app"],
+                                       "location" => $location);
 
                        // Diaspora rejects messages when they contain a location without "lat" or "lng"
-                       if (!isset($location["lat"]) OR !isset($location["lng"])) {
+                       if (!isset($location["lat"]) || !isset($location["lng"])) {
                                unset($message["location"]);
                        }
 
@@ -3194,7 +3213,7 @@ class Diaspora {
                                        $message['event'] = $event;
 
                                        /// @todo Once Diaspora supports it, we will remove the body
-                                       // $message['raw_message'] = '';
+                                       // $message['text'] = '';
                                }
                        }
 
@@ -3249,12 +3268,12 @@ class Diaspora {
                        $positive = "false";
                }
 
-               return(array("positive" => $positive,
+               return(array("author" => self::my_handle($owner),
                                "guid" => $item["guid"],
-                               "target_type" => $target_type,
                                "parent_guid" => $parent["guid"],
-                               "author_signature" => "",
-                               "diaspora_handle" => self::my_handle($owner)));
+                               "parent_type" => $target_type,
+                               "positive" => $positive,
+                               "author_signature" => ""));
        }
 
        /**
@@ -3326,12 +3345,12 @@ class Diaspora {
                $text = html_entity_decode(bb2diaspora($item["body"]));
                $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
 
-               $comment = array("guid" => $item["guid"],
+               $comment = array("author" => self::my_handle($owner),
+                               "guid" => $item["guid"],
+                               "created_at" => $created,
                                "parent_guid" => $parent["guid"],
-                               "author_signature" => "",
                                "text" => $text,
-                               /// @todo Currently disabled until Diaspora supports it: "created_at" => $created,
-                               "diaspora_handle" => self::my_handle($owner));
+                               "author_signature" => "");
 
                // Send the thread parent guid only if it is a threaded comment
                if ($item['thr-parent'] != $item['parent-uri']) {
@@ -3388,19 +3407,17 @@ class Diaspora {
                $signed_parts = explode(";", $signature['signed_text']);
 
                if ($item["deleted"])
-                       $message = array("parent_author_signature" => "",
+                       $message = array("author" => $signature['signer'],
                                        "target_guid" => $signed_parts[0],
-                                       "target_type" => $signed_parts[1],
-                                       "sender_handle" => $signature['signer'],
-                                       "target_author_signature" => $signature['signature']);
+                                       "target_type" => $signed_parts[1]);
                elseif ($item['verb'] === ACTIVITY_LIKE)
-                       $message = array("positive" => $signed_parts[0],
+                       $message = array("author" => $signed_parts[4],
                                        "guid" => $signed_parts[1],
-                                       "target_type" => $signed_parts[2],
                                        "parent_guid" => $signed_parts[3],
-                                       "parent_author_signature" => "",
+                                       "parent_type" => $signed_parts[2],
+                                       "positive" => $signed_parts[0],
                                        "author_signature" => $signature['signature'],
-                                       "diaspora_handle" => $signed_parts[4]);
+                                       "parent_author_signature" => "");
                else {
                        // Remove the comment guid
                        $guid = array_shift($signed_parts);
@@ -3414,12 +3431,12 @@ class Diaspora {
                        // Glue the parts together
                        $text = implode(";", $signed_parts);
 
-                       $message = array("guid" => $guid,
+                       $message = array("author" => $handle,
+                                       "guid" => $guid,
                                        "parent_guid" => $parent_guid,
-                                       "parent_author_signature" => "",
-                                       "author_signature" => $signature['signature'],
                                        "text" => implode(";", $signed_parts),
-                                       "diaspora_handle" => $handle);
+                                       "author_signature" => $signature['signature'],
+                                       "parent_author_signature" => "");
                }
                return $message;
        }
@@ -3459,7 +3476,7 @@ class Diaspora {
 
                // Old way - is used by the internal Friendica functions
                /// @todo Change all signatur storing functions to the new format
-               if ($signature['signed_text'] AND $signature['signature'] AND $signature['signer'])
+               if ($signature['signed_text'] && $signature['signature'] && $signature['signer'])
                        $message = self::message_from_signature($item, $signature);
                else {// New way
                        $msg = json_decode($signature['signed_text'], true);
@@ -3468,10 +3485,12 @@ class Diaspora {
                        if (is_array($msg)) {
                                foreach ($msg AS $field => $data) {
                                        if (!$item["deleted"]) {
-                                               if ($field == "author")
-                                                       $field = "diaspora_handle";
-                                               if ($field == "parent_type")
-                                                       $field = "target_type";
+                                               if ($field == "diaspora_handle") {
+                                                       $field = "author";
+                                               }
+                                               if ($field == "target_type") {
+                                                       $field = "parent_type";
+                                               }
                                        }
 
                                        $message[$field] = $data;
@@ -3502,26 +3521,12 @@ class Diaspora {
 
                $itemaddr = self::handle_from_contact($item["contact-id"], $item["gcontact-id"]);
 
-               // Check whether the retraction is for a top-level post or whether it's a relayable
-               if ($item["uri"] !== $item["parent-uri"]) {
-                       $msg_type = "relayable_retraction";
-                       $target_type = (($item["verb"] === ACTIVITY_LIKE) ? "Like" : "Comment");
-               } else {
-                       $msg_type = "signed_retraction";
-                       $target_type = "StatusMessage";
-               }
+               $msg_type = "retraction";
+               $target_type = "Post";
 
-               if ($relay AND ($item["uri"] !== $item["parent-uri"]))
-                       $signature = "parent_author_signature";
-               else
-                       $signature = "target_author_signature";
-
-               $signed_text = $item["guid"].";".$target_type;
-
-               $message = array("target_guid" => $item['guid'],
-                               "target_type" => $target_type,
-                               "sender_handle" => $itemaddr,
-                               $signature => base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')));
+               $message = array("author" => $itemaddr,
+                               "target_guid" => $item['guid'],
+                               "target_type" => $target_type);
 
                logger("Got message ".print_r($message, true), LOGGER_DEBUG);
 
@@ -3553,40 +3558,35 @@ class Diaspora {
                $cnv = $r[0];
 
                $conv = array(
+                       "author" => $cnv["creator"],
                        "guid" => $cnv["guid"],
                        "subject" => $cnv["subject"],
                        "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d\TH:i:s\Z'),
-                       "diaspora_handle" => $cnv["creator"],
-                       "participant_handles" => $cnv["recips"]
+                       "participants" => $cnv["recips"]
                );
 
                $body = bb2diaspora($item["body"]);
                $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
 
-               $signed_text = $item["guid"].";".$cnv["guid"].";".$body.";".$created.";".$myaddr.";".$cnv['guid'];
-               $sig = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
-
                $msg = array(
+                       "author" => $myaddr,
                        "guid" => $item["guid"],
-                       "parent_guid" => $cnv["guid"],
-                       "parent_author_signature" => $sig,
-                       "author_signature" => $sig,
+                       "conversation_guid" => $cnv["guid"],
                        "text" => $body,
                        "created_at" => $created,
-                       "diaspora_handle" => $myaddr,
-                       "conversation_guid" => $cnv["guid"]
                );
 
                if ($item["reply"]) {
                        $message = $msg;
                        $type = "message";
                } else {
-                       $message = array("guid" => $cnv["guid"],
+                       $message = array(
+                                       "author" => $cnv["creator"],
+                                       "guid" => $cnv["guid"],
                                        "subject" => $cnv["subject"],
                                        "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d\TH:i:s\Z'),
-                                       "message" => $msg,
-                                       "diaspora_handle" => $cnv["creator"],
-                                       "participant_handles" => $cnv["recips"]);
+                                       "participants" => $cnv["recips"],
+                                       "message" => $msg);
 
                        $type = "conversation";
                }
@@ -3661,7 +3661,7 @@ class Diaspora {
                        $tags = trim($tags);
                }
 
-               $message = array("diaspora_handle" => $handle,
+               $message = array("author" => $handle,
                                "first_name" => $first,
                                "last_name" => $last,
                                "image_url" => $large,
@@ -3672,6 +3672,7 @@ class Diaspora {
                                "bio" => $about,
                                "location" => $location,
                                "searchable" => $searchable,
+                               "nsfw" => "false",
                                "tag_string" => $tags);
 
                foreach ($recips as $recip) {
@@ -3691,7 +3692,7 @@ class Diaspora {
        public static function store_like_signature($contact, $post_id) {
 
                // Is the contact the owner? Then fetch the private key
-               if (!$contact['self'] OR ($contact['uid'] == 0)) {
+               if (!$contact['self'] || ($contact['uid'] == 0)) {
                        logger("No owner post, so not storing signature", LOGGER_DEBUG);
                        return false;
                }
@@ -3715,8 +3716,10 @@ class Diaspora {
                $message = self::construct_like($r[0], $contact);
                $message["author_signature"] = self::signature($contact, $message);
 
-               // We now store the signature more flexible to dynamically support new fields.
-               // This will break Diaspora compatibility with Friendica versions prior to 3.5.
+               /*
+                * Now store the signature more flexible to dynamically support new fields.
+                * This will break Diaspora compatibility with Friendica versions prior to 3.5.
+                */
                q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
                        intval($message_id),
                        dbesc(json_encode($message))
@@ -3748,9 +3751,11 @@ class Diaspora {
                $message = self::construct_comment($item, $contact);
                $message["author_signature"] = self::signature($contact, $message);
 
-               // We now store the signature more flexible to dynamically support new fields.
-               // This will break Diaspora compatibility with Friendica versions prior to 3.5.
-               q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
+               /*
+                * Now store the signature more flexible to dynamically support new fields.
+                * This will break Diaspora compatibility with Friendica versions prior to 3.5.
+                */
+               q("INSERT INTO `sign` (`iid`, `signed_text`) VALUES (%d, '%s')",
                        intval($message_id),
                        dbesc(json_encode($message))
                );
@@ -3759,4 +3764,3 @@ class Diaspora {
                return true;
        }
 }
-?>