<?php /** * @file include/diaspora.php * @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. */ require_once("include/items.php"); require_once("include/bb2diaspora.php"); require_once("include/Scrape.php"); require_once("include/Contact.php"); require_once("include/Photo.php"); require_once("include/socgraph.php"); require_once("include/group.php"); require_once("include/xml.php"); require_once("include/datetime.php"); require_once("include/queue_fn.php"); /** * @brief This class contain functions to create and send Diaspora XML files * */ class diaspora { /** * @brief Return a list of relay servers * * This is an experimental Diaspora feature. * * @return array of relay servers */ public static function relay_list() { $serverdata = get_config("system", "relay_server"); if ($serverdata == "") return array(); $relay = array(); $servers = explode(",", $serverdata); foreach($servers AS $server) { $server = trim($server); $batch = $server."/receive/public"; $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch)); if (!$relais) { $addr = "relay@".str_replace("http://", "", normalise_link($server)); $r = q("INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`) VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')", datetime_convert(), dbesc($addr), dbesc($addr), dbesc($server), dbesc(normalise_link($server)), dbesc($batch), dbesc(NETWORK_DIASPORA), intval(CONTACT_IS_FOLLOWER), dbesc(datetime_convert()), dbesc(datetime_convert()), dbesc(datetime_convert()) ); $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch)); if ($relais) $relay[] = $relais[0]; } else $relay[] = $relais[0]; } return $relay; } /** * @brief repairs a signature that was double encoded * * The function is unused at the moment. It was copied from the old implementation. * * @param string $signature The signature * @param string $handle The handle of the signature owner * @param integer $level This value is only set inside this function to avoid endless loops * * @return string the repaired signature */ private function repair_signature($signature, $handle = "", $level = 1) { if ($signature == "") return ($signature); if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) { $signature = base64_decode($signature); logger("Repaired double encoded signature from Diaspora/Hubzilla handle ".$handle." - level ".$level, LOGGER_DEBUG); // Do a recursive call to be able to fix even multiple levels if ($level < 10) $signature = self::repair_signature($signature, $handle, ++$level); } return($signature); } /** * @brief verify the envelope and return the verified data * * @param string $envelope The magic envelope * * @return string verified data */ private function verify_magic_envelope($envelope) { $basedom = parse_xml_string($envelope, false); if (!is_object($basedom)) { logger("Envelope is no XML file"); return false; } $children = $basedom->children('http://salmon-protocol.org/ns/magic-env'); if (sizeof($children) == 0) { logger("XML has no children"); return false; } $handle = ""; $data = base64url_decode($children->data); $type = $children->data->attributes()->type[0]; $encoding = $children->encoding; $alg = $children->alg; $sig = base64url_decode($children->sig); $key_id = $children->sig->attributes()->key_id[0]; if ($key_id != "") $handle = base64url_decode($key_id); $b64url_data = base64url_encode($data); $msg = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data); $signable_data = $msg.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg); $key = self::key($handle); $verify = rsa_verify($signable_data, $sig, $key); if (!$verify) { logger('Message did not verify. Discarding.'); return false; } return $data; } /** * @brief: Decodes incoming Diaspora message * * @param array $importer Array of the importer user * @param string $xml urldecoded Diaspora salmon * * @return array * 'message' -> decoded Diaspora XML message * 'author' -> author diaspora handle * 'key' -> author public key (converted to pkcs#8) */ public static function decode($importer, $xml) { $public = false; $basedom = parse_xml_string($xml); if (!is_object($basedom)) return false; $children = $basedom->children('https://joindiaspora.com/protocol'); if($children->header) { $public = true; $author_link = str_replace('acct:','',$children->header->author_id); } else { $encrypted_header = json_decode(base64_decode($children->encrypted_header)); $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key); $ciphertext = base64_decode($encrypted_header->ciphertext); $outer_key_bundle = ''; openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']); $j_outer_key_bundle = json_decode($outer_key_bundle); $outer_iv = base64_decode($j_outer_key_bundle->iv); $outer_key = base64_decode($j_outer_key_bundle->key); $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv); $decrypted = pkcs5_unpad($decrypted); logger('decrypted: '.$decrypted, LOGGER_DEBUG); $idom = parse_xml_string($decrypted,false); $inner_iv = base64_decode($idom->iv); $inner_aes_key = base64_decode($idom->aes_key); $author_link = str_replace('acct:','',$idom->author_id); } $dom = $basedom->children(NAMESPACE_SALMON_ME); // figure out where in the DOM tree our data is hiding if($dom->provenance->data) $base = $dom->provenance; elseif($dom->env->data) $base = $dom->env; elseif($dom->data) $base = $dom; if (!$base) { logger('unable to locate salmon data in xml'); http_status_exit(400); } // Stash the signature away for now. We have to find their key or it won't be good for anything. $signature = base64url_decode($base->sig); // unpack the data // strip whitespace so our data element will return to one big base64 blob $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data); // stash away some other stuff for later $type = $base->data[0]->attributes()->type[0]; $keyhash = $base->sig[0]->attributes()->keyhash[0]; $encoding = $base->encoding; $alg = $base->alg; $signed_data = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg); // decode the data $data = base64url_decode($data); if($public) $inner_decrypted = $data; else { // Decode the encrypted blob $inner_encrypted = base64_decode($data); $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv); $inner_decrypted = pkcs5_unpad($inner_decrypted); } if (!$author_link) { logger('Could not retrieve author URI.'); http_status_exit(400); } // Once we have the author URI, go to the web and try to find their public key // (first this will look it up locally if it is in the fcontact cache) // This will also convert diaspora public key from pkcs#1 to pkcs#8 logger('Fetching key for '.$author_link); $key = self::key($author_link); if (!$key) { logger('Could not retrieve author key.'); http_status_exit(400); } $verify = rsa_verify($signed_data,$signature,$key); if (!$verify) { logger('Message did not verify. Discarding.'); http_status_exit(400); } logger('Message verified.'); return array('message' => (string)$inner_decrypted, 'author' => unxmlify($author_link), 'key' => (string)$key); } /** * @brief Dispatches public messages and find the fitting receivers * * @param array $msg The post that will be dispatched * * @return int The message id of the generated message, "true" or "false" if there was an error */ public static function dispatch_public($msg) { $enabled = intval(get_config("system", "diaspora_enabled")); if (!$enabled) { logger("diaspora is disabled"); return false; } // 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); // Now distribute it to the followers $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN (SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s') AND NOT `account_expired` AND NOT `account_removed`", dbesc(NETWORK_DIASPORA), dbesc($msg["author"]) ); if($r) { foreach($r as $rr) { logger("delivering to: ".$rr["username"]); self::dispatch($rr,$msg); } } else logger("No subscribers for ".$msg["author"]." ".print_r($msg, true)); return $message_id; } /** * @brief Dispatches the different message types to the different functions * * @param array $importer Array of the importer user * @param array $msg The post that will be dispatched * * @return int The message id of the generated message, "true" or "false" if there was an error */ public static function dispatch($importer, $msg) { // 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 = $msg["author"]; if (!diaspora::valid_posting($msg, $fields)) { logger("Invalid posting"); return false; } $type = $fields->getName(); logger("Received message type ".$type." from ".$sender." for user ".$importer["uid"], LOGGER_DEBUG); switch ($type) { case "account_deletion": return self::receive_account_deletion($importer, $fields); case "comment": return self::receive_comment($importer, $sender, $fields, $msg["message"]); case "contact": return self::receive_contact_request($importer, $fields); case "conversation": return self::receive_conversation($importer, $msg, $fields); case "like": return self::receive_like($importer, $sender, $fields); case "message": return self::receive_message($importer, $fields); case "participation": // Not implemented return self::receive_participation($importer, $fields); case "photo": // Not implemented return self::receive_photo($importer, $fields); case "poll_participation": // Not implemented return self::receive_poll_participation($importer, $fields); case "profile": return self::receive_profile($importer, $fields); case "reshare": return self::receive_reshare($importer, $fields, $msg["message"]); case "retraction": return self::receive_retraction($importer, $sender, $fields); case "status_message": return self::receive_status_message($importer, $fields, $msg["message"]); default: logger("Unknown message type ".$type); return false; } return true; } /** * @brief Checks if a posting is valid and fetches the data fields. * * This function does not only check the signature. * 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 $fields SimpleXML object that contains the posting when it is valid * * @return bool Is the posting valid? */ private function valid_posting($msg, &$fields) { $data = parse_xml_string($msg["message"], false); if (!is_object($data)) { logger("No valid XML ".$msg["message"], LOGGER_DEBUG); return false; } $first_child = $data->getName(); // Is this the new or the old version? if ($data->getName() == "XML") { $oldXML = true; foreach ($data->post->children() as $child) $element = $child; } else { $oldXML = false; $element = $data; } $type = $element->getName(); $orig_type = $type; logger("Got message type ".$type.": ".$msg["message"], LOGGER_DATA); // All retractions are handled identically from now on. // In the new version there will only be "retraction". if (in_array($type, array("signed_retraction", "relayable_retraction"))) $type = "retraction"; if ($type == "request") $type = "contact"; $fields = new SimpleXMLElement("<".$type."/>"); $signed_data = ""; foreach ($element->children() AS $fieldname => $entry) { if ($oldXML) { // Translation for the old XML structure if ($fieldname == "diaspora_handle") $fieldname = "author"; if ($fieldname == "participant_handles") $fieldname = "participants"; if (in_array($type, array("like", "participation"))) { if ($fieldname == "target_type") $fieldname = "parent_type"; } if ($fieldname == "sender_handle") $fieldname = "author"; if ($fieldname == "recipient_handle") $fieldname = "recipient"; if ($fieldname == "root_diaspora_id") $fieldname = "root_author"; if ($type == "retraction") { if ($fieldname == "post_guid") $fieldname = "target_guid"; if ($fieldname == "type") $fieldname = "target_type"; } } if (($fieldname == "author_signature") AND ($entry != "")) $author_signature = base64_decode($entry); elseif (($fieldname == "parent_author_signature") AND ($entry != "")) $parent_author_signature = base64_decode($entry); elseif (!in_array($fieldname, array("author_signature", "parent_author_signature", "target_author_signature"))) { if ($signed_data != "") { $signed_data .= ";"; $signed_data_parent .= ";"; } $signed_data .= $entry; } if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) OR ($orig_type == "relayable_retraction")) xml::copy($entry, $fields, $fieldname); } // This is something that shouldn't happen at all. if (in_array($type, array("status_message", "reshare", "profile"))) if ($msg["author"] != $fields->author) { logger("Message handle is not the same as envelope sender. Quitting this message."); return false; } // Only some message types have signatures. So we quit here for the other types. if (!in_array($type, array("comment", "message", "like"))) return true; // No author_signature? This is a must, so we quit. if (!isset($author_signature)) { logger("No author signature for type ".$type." - Message: ".$msg["message"], LOGGER_DEBUG); return false; } if (isset($parent_author_signature)) { $key = self::key($msg["author"]); if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256")) { logger("No valid parent author signature for author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$parent_author_signature, LOGGER_DEBUG); return false; } } $key = self::key($fields->author); if (!rsa_verify($signed_data, $author_signature, $key, "sha256")) { logger("No valid author signature for author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$author_signature, LOGGER_DEBUG); return false; } else return true; } /** * @brief Fetches the public key for a given handle * * @param string $handle The handle * * @return string The public key */ private function key($handle) { $handle = strval($handle); logger("Fetching diaspora key for: ".$handle); $r = self::person_by_handle($handle); if($r) return $r["pubkey"]; return ""; } /** * @brief Fetches data for a given handle * * @param string $handle The handle * * @return array the queried data */ private function person_by_handle($handle) { $r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1", dbesc(NETWORK_DIASPORA), dbesc($handle) ); if ($r) { $person = $r[0]; logger("In cache ".print_r($r,true), LOGGER_DEBUG); // update record occasionally so it doesn't get stale $d = strtotime($person["updated"]." +00:00"); if ($d < strtotime("now - 14 days")) $update = true; if ($person["guid"] == "") $update = true; } if (!$person OR $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)) { self::add_fcontact($r, $update); $person = $r; } } return $person; } /** * @brief Updates the fcontact table * * @param array $arr The fcontact data * @param bool $update Update or insert? * * @return string The id of the fcontact entry */ private function add_fcontact($arr, $update = false) { if($update) { $r = q("UPDATE `fcontact` SET `name` = '%s', `photo` = '%s', `request` = '%s', `nick` = '%s', `addr` = '%s', `guid` = '%s', `batch` = '%s', `notify` = '%s', `poll` = '%s', `confirm` = '%s', `alias` = '%s', `pubkey` = '%s', `updated` = '%s' WHERE `url` = '%s' AND `network` = '%s'", dbesc($arr["name"]), dbesc($arr["photo"]), dbesc($arr["request"]), dbesc($arr["nick"]), dbesc(strtolower($arr["addr"])), dbesc($arr["guid"]), dbesc($arr["batch"]), dbesc($arr["notify"]), dbesc($arr["poll"]), dbesc($arr["confirm"]), dbesc($arr["alias"]), dbesc($arr["pubkey"]), dbesc(datetime_convert()), dbesc($arr["url"]), dbesc($arr["network"]) ); } else { $r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`, `guid`, `batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`) VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')", dbesc($arr["url"]), dbesc($arr["name"]), dbesc($arr["photo"]), dbesc($arr["request"]), dbesc($arr["nick"]), dbesc($arr["addr"]), dbesc($arr["guid"]), dbesc($arr["batch"]), dbesc($arr["notify"]), dbesc($arr["poll"]), dbesc($arr["confirm"]), dbesc($arr["network"]), dbesc($arr["alias"]), dbesc($arr["pubkey"]), dbesc(datetime_convert()) ); } return $r; } /** * @brief get a handle (user@domain.tld) from a given contact id or gcontact id * * @param int $contact_id The id in the contact table * @param int $gcontact_id The id in the gcontact table * * @return string the handle */ public static function handle_from_contact($contact_id, $gcontact_id = 0) { $handle = False; logger("contact id is ".$contact_id." - gcontact id is ".$gcontact_id, LOGGER_DEBUG); if ($gcontact_id != 0) { $r = q("SELECT `addr` FROM `gcontact` WHERE `id` = %d AND `addr` != ''", intval($gcontact_id)); if ($r) return strtolower($r[0]["addr"]); } $r = q("SELECT `network`, `addr`, `self`, `url`, `nick` FROM `contact` WHERE `id` = %d", intval($contact_id)); if ($r) { $contact = $r[0]; logger("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], LOGGER_DEBUG); if($contact['addr'] != "") $handle = $contact['addr']; else { $baseurl_start = strpos($contact['url'],'://') + 3; $baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle $baseurl = substr($contact['url'], $baseurl_start, $baseurl_length); $handle = $contact['nick'].'@'.$baseurl; } } return strtolower($handle); } /** * @brief Get a contact id for a given handle * * @param int $uid The user id * @param string $handle The handle in the format user@domain.tld * * @return The contact id */ private function contact_by_handle($uid, $handle) { $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1", intval($uid), dbesc($handle) ); if ($r) return $r[0]; $handle_parts = explode("@", $handle); $nurl_sql = "%%://".$handle_parts[1]."%%/profile/".$handle_parts[0]; $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `nurl` LIKE '%s' LIMIT 1", dbesc(NETWORK_DFRN), intval($uid), dbesc($nurl_sql) ); if($r) return $r[0]; return false; } /** * @brief Check if posting is allowed for this contact * * @param array $importer Array of the importer user * @param array $contact The contact that is checked * @param bool $is_comment Is the check for a comment? * * @return bool is the contact allowed to post? */ private function post_allow($importer, $contact, $is_comment = false) { // perhaps we were already sharing with this person. Now they're sharing with us. // That makes us friends. // Normally this should have handled by getting a request - but this could get lost if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) { q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d", intval(CONTACT_IS_FRIEND), intval($contact["id"]), intval($importer["uid"]) ); $contact["rel"] = CONTACT_IS_FRIEND; logger("defining user ".$contact["nick"]." as friend"); } if(($contact["blocked"]) || ($contact["readonly"]) || ($contact["archive"])) return false; if($contact["rel"] == CONTACT_IS_SHARING || $contact["rel"] == CONTACT_IS_FRIEND) return true; if($contact["rel"] == CONTACT_IS_FOLLOWER) if(($importer["page-flags"] == PAGE_COMMUNITY) OR $is_comment) return true; // Messages for the global users are always accepted if ($importer["uid"] == 0) return true; return false; } /** * @brief Fetches the contact id for a handle and checks if posting is allowed * * @param array $importer Array of the importer user * @param string $handle The checked handle in the format user@domain.tld * @param bool $is_comment Is the check for a comment? * * @return array The contact data */ private function allowed_contact_by_handle($importer, $handle, $is_comment = false) { $contact = self::contact_by_handle($importer["uid"], $handle); if (!$contact) { logger("A Contact for handle ".$handle." and user ".$importer["uid"]." was not found"); return false; } if (!self::post_allow($importer, $contact, $is_comment)) { logger("The handle: ".$handle." is not allowed to post to user ".$importer["uid"]); return false; } return $contact; } /** * @brief Does the message already exists on the system? * * @param int $uid The user id * @param string $guid The guid of the message * * @return int|bool message id if the message already was stored into the system - or false. */ private function message_exists($uid, $guid) { $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1", intval($uid), dbesc($guid) ); if($r) { logger("message ".$guid." already exists for user ".$uid); return $r[0]["id"]; } return false; } /** * @brief Checks for links to posts in a message * * @param array $item The item array */ private function fetch_guid($item) { preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi", function ($match) use ($item){ return(self::fetch_guid_sub($match, $item)); },$item["body"]); } /** * @brief sub function of "fetch_guid" which checks for links in messages * * @param array $match array containing a link that has to be checked for a message link * @param array $item The item array */ private function fetch_guid_sub($match, $item) { if (!self::store_by_guid($match[1], $item["author-link"])) self::store_by_guid($match[1], $item["owner-link"]); } /** * @brief Fetches an item with a given guid from a given server * * @param string $guid the message guid * @param string $server The server address * @param int $uid The user id of the user * * @return int the message id of the stored message or false */ private function store_by_guid($guid, $server, $uid = 0) { $serverparts = parse_url($server); $server = $serverparts["scheme"]."://".$serverparts["host"]; logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG); $msg = self::message($guid, $server); if (!$msg) return false; logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG); // Now call the dispatcher return self::dispatch_public($msg); } /** * @brief Fetches a message from a server * * @param string $guid message guid * @param string $server The url of the server * @param int $level Endless loop prevention * * @return array * 'message' => The message XML * 'author' => The author handle * 'key' => The public key of the author */ private function message($guid, $server, $level = 0) { if ($level > 5) return false; // This will work for new Diaspora servers and Friendica servers from 3.5 $source_url = $server."/fetch/post/".$guid; logger("Fetch post from ".$source_url, LOGGER_DEBUG); $envelope = fetch_url($source_url); if($envelope) { logger("Envelope was fetched.", LOGGER_DEBUG); $x = self::verify_magic_envelope($envelope); if (!$x) logger("Envelope could not be verified.", LOGGER_DEBUG); else logger("Envelope was verified.", LOGGER_DEBUG); } else $x = false; // This will work for older Diaspora and Friendica servers if (!$x) { $source_url = $server."/p/".$guid.".xml"; logger("Fetch post from ".$source_url, LOGGER_DEBUG); $x = fetch_url($source_url); if(!$x) return false; } $source_xml = parse_xml_string($x, false); if (!is_object($source_xml)) return false; if ($source_xml->post->reshare) { // Reshare of a reshare - old Diaspora version logger("Message is a reshare", LOGGER_DEBUG); return self::message($source_xml->post->reshare->root_guid, $server, ++$level); } elseif ($source_xml->getName() == "reshare") { // Reshare of a reshare - new Diaspora version logger("Message is a new reshare", LOGGER_DEBUG); return self::message($source_xml->root_guid, $server, ++$level); } $author = ""; // Fetch the author - for the old and the new Diaspora version if ($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")) $author = (string)$source_xml->author; // If this isn't a "status_message" then quit if (!$author) { logger("Message doesn't seem to be a status message", LOGGER_DEBUG); return false; } $msg = array("message" => $x, "author" => $author); $msg["key"] = self::key($msg["author"]); return $msg; } /** * @brief Fetches the item record of a given guid * * @param int $uid The user id * @param string $guid message guid * @param string $author The handle of the item * @param array $contact The contact of the item owner * * @return array the item record */ private function parent_item($uid, $guid, $author, $contact) { $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`, `author-name`, `author-link`, `author-avatar`, `owner-name`, `owner-link`, `owner-avatar` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1", intval($uid), dbesc($guid)); if(!$r) { $result = self::store_by_guid($guid, $contact["url"], $uid); if (!$result) { $person = self::person_by_handle($author); $result = self::store_by_guid($guid, $person["url"], $uid); } if ($result) { logger("Fetched missing item ".$guid." - result: ".$result, LOGGER_DEBUG); $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`, `author-name`, `author-link`, `author-avatar`, `owner-name`, `owner-link`, `owner-avatar` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1", intval($uid), dbesc($guid)); } } if (!$r) { logger("parent item not found: parent: ".$guid." - user: ".$uid); return false; } else { logger("parent item found: parent: ".$guid." - user: ".$uid); return $r[0]; } } /** * @brief returns contact details * * @param array $contact The default contact if the person isn't found * @param array $person The record of the person * @param int $uid The user id * * @return array * 'cid' => contact id * 'network' => network type */ private function author_contact_by_url($contact, $person, $uid) { $r = q("SELECT `id`, `network`, `url` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1", dbesc(normalise_link($person["url"])), intval($uid)); if ($r) { $cid = $r[0]["id"]; $network = $r[0]["network"]; // We are receiving content from a user that is about to be terminated // This means the user is vital, so we remove a possible termination date. unmark_for_death($contact); } else { $cid = $contact["id"]; $network = NETWORK_DIASPORA; } return array("cid" => $cid, "network" => $network); } /** * @brief Is the profile a hubzilla profile? * * @param string $url The profile link * * @return bool is it a hubzilla server? */ public static function is_redmatrix($url) { return(strstr($url, "/channel/")); } /** * @brief Generate a post link with a given handle and message guid * * @param string $addr The user handle * @param string $guid message guid * * @return string the post link */ private function plink($addr, $guid) { $r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr)); // Fallback if (!$r) return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid; // Friendica contacts are often detected as Diaspora contacts in the "fcontact" table // So we try another way as well. $s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"]))); if ($s) $r[0]["network"] = $s[0]["network"]; if ($r[0]["network"] == NETWORK_DFRN) return(str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/")); if (self::is_redmatrix($r[0]["url"])) return $r[0]["url"]."/?f=&mid=".$guid; return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid; } /** * @brief Processes an account deletion * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool Success */ private function receive_account_deletion($importer, $data) { /// @todo Account deletion should remove the contact from the global contacts as well $author = notags(unxmlify($data->author)); $contact = self::contact_by_handle($importer["uid"], $author); if (!$contact) { logger("cannot find contact for author: ".$author); return false; } // We now remove the contact contact_remove($contact["id"]); return true; } /** * @brief Fetch the uri from our database if we already have this item (maybe from ourselves) * * @param string $author Author handle * @param string $guid Message guid * * @return string The constructed uri or the one from our database */ private function get_uri_from_guid($author, $guid) { $r = q("SELECT `uri` FROM `item` WHERE `guid` = '%s' LIMIT 1", dbesc($guid)); if ($r) return $r[0]["uri"]; else return $author.":".$guid; } /** * @brief Processes an incoming comment * * @param array $importer Array of the importer user * @param string $sender The sender of the message * @param object $data The message object * @param string $xml The original XML of the message * * @return int The message id of the generated comment or "false" if there was an error */ private function receive_comment($importer, $sender, $data, $xml) { $guid = notags(unxmlify($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))); else $created_at = datetime_convert(); $contact = self::allowed_contact_by_handle($importer, $sender, true); if (!$contact) return false; $message_id = self::message_exists($importer["uid"], $guid); if ($message_id) return $message_id; $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact); if (!$parent_item) return false; $person = self::person_by_handle($author); if (!is_array($person)) { logger("unable to find author details"); return false; } // Fetch the contact id - if we know this contact $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]); $datarray = array(); $datarray["uid"] = $importer["uid"]; $datarray["contact-id"] = $author_contact["cid"]; $datarray["network"] = $author_contact["network"]; $datarray["author-name"] = $person["name"]; $datarray["author-link"] = $person["url"]; $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]); $datarray["owner-name"] = $contact["name"]; $datarray["owner-link"] = $contact["url"]; $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]); $datarray["guid"] = $guid; $datarray["uri"] = self::get_uri_from_guid($author, $guid); $datarray["type"] = "remote-comment"; $datarray["verb"] = ACTIVITY_POST; $datarray["gravity"] = GRAVITY_COMMENT; $datarray["parent-uri"] = $parent_item["uri"]; $datarray["object-type"] = ACTIVITY_OBJ_COMMENT; $datarray["object"] = $xml; $datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at; $datarray["body"] = diaspora2bb($text); self::fetch_guid($datarray); $message_id = item_store($datarray); 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 $parent_item["origin"]) { // Formerly we stored the signed text, the signature and the author in different fields. // We now store the raw data so that we are more flexible. q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')", intval($message_id), dbesc(json_encode($data)) ); // notify others proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $message_id); } return $message_id; } /** * @brief processes and stores private messages * * @param array $importer Array of the importer user * @param array $contact The contact of the message * @param object $data The message object * @param array $msg Array of the processed message, author handle and key * @param object $mesg The private message * @param array $conversation The conversation record to which this message belongs * * @return bool "true" if it was successful */ private function receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation) { $guid = notags(unxmlify($data->guid)); $subject = notags(unxmlify($data->subject)); $author = notags(unxmlify($data->author)); $reply = 0; $msg_guid = notags(unxmlify($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 if ($mesg->author) $msg_author = notags(unxmlify($mesg->author)); elseif ($mesg->diaspora_handle) $msg_author = notags(unxmlify($mesg->diaspora_handle)); else return false; $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid)); if($msg_conversation_guid != $guid) { logger("message conversation guid does not belong to the current conversation."); return false; } $body = diaspora2bb($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 = $person["pubkey"]; else { logger("unable to find author details"); return false; } } if (!rsa_verify($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) ); if($r) { logger("duplicate message already delivered.", LOGGER_DEBUG); return false; } q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) VALUES (%d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')", intval($importer["uid"]), dbesc($msg_guid), intval($conversation["id"]), dbesc($person["name"]), dbesc($person["photo"]), dbesc($person["url"]), intval($contact["id"]), dbesc($subject), dbesc($body), 0, 0, dbesc($message_uri), dbesc($author.":".$guid), dbesc($msg_created_at) ); q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d", dbesc(datetime_convert()), intval($conversation["id"]) ); notification(array( "type" => NOTIFY_MAIL, "notify_flags" => $importer["notify-flags"], "language" => $importer["language"], "to_name" => $importer["username"], "to_email" => $importer["email"], "uid" =>$importer["uid"], "item" => array("subject" => $subject, "body" => $body), "source_name" => $person["name"], "source_link" => $person["url"], "source_photo" => $person["thumb"], "verb" => ACTIVITY_POST, "otype" => "mail" )); return true; } /** * @brief Processes new private messages (answers to private messages are processed elsewhere) * * @param array $importer Array of the importer user * @param array $msg Array of the processed message, author handle and key * @param object $data The message object * * @return bool Success */ private function receive_conversation($importer, $msg, $data) { $guid = notags(unxmlify($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 = $data->message; if (!count($messages)) { logger("empty conversation"); return false; } $contact = self::allowed_contact_by_handle($importer, $msg["author"], true); if (!$contact) return false; $conversation = null; $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1", intval($importer["uid"]), dbesc($guid) ); if($c) $conversation = $c[0]; else { $r = q("INSERT INTO `conv` (`uid`, `guid`, `creator`, `created`, `updated`, `subject`, `recips`) VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s')", intval($importer["uid"]), dbesc($guid), dbesc($author), dbesc($created_at), dbesc(datetime_convert()), dbesc($subject), dbesc($participants) ); if($r) $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1", intval($importer["uid"]), dbesc($guid) ); if($c) $conversation = $c[0]; } if (!$conversation) { logger("unable to create conversation."); return; } foreach($messages as $mesg) self::receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation); return true; } /** * @brief Creates the body for a "like" message * * @param array $contact The contact that send us the "like" * @param array $parent_item The item array of the parent item * @param string $guid message guid * * @return string the body */ private function construct_like_body($contact, $parent_item, $guid) { $bodyverb = t('%1$s likes %2$s\'s %3$s'); $ulink = "[url=".$contact["url"]."]".$contact["name"]."[/url]"; $alink = "[url=".$parent_item["author-link"]."]".$parent_item["author-name"]."[/url]"; $plink = "[url=".App::get_baseurl()."/display/".urlencode($guid)."]".t("status")."[/url]"; return sprintf($bodyverb, $ulink, $alink, $plink); } /** * @brief Creates a XML object for a "like" * * @param array $importer Array of the importer user * @param array $parent_item The item array of the parent item * * @return string The XML */ private function construct_like_object($importer, $parent_item) { $objtype = ACTIVITY_OBJ_NOTE; $link = '<link rel="alternate" type="text/html" href="'.App::get_baseurl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />'; $parent_body = $parent_item["body"]; $xmldata = array("object" => array("type" => $objtype, "local" => "1", "id" => $parent_item["uri"], "link" => $link, "title" => "", "content" => $parent_body)); return xml::from_array($xmldata, $xml, true); } /** * @brief Processes "like" messages * * @param array $importer Array of the importer user * @param string $sender The sender of the message * @param object $data The message object * * @return int The message id of the generated like or "false" if there was an error */ private function receive_like($importer, $sender, $data) { $positive = notags(unxmlify($data->positive)); $guid = notags(unxmlify($data->guid)); $parent_type = notags(unxmlify($data->parent_type)); $parent_guid = notags(unxmlify($data->parent_guid)); $author = notags(unxmlify($data->author)); // 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. if (!in_array($parent_type, array("Post", "Comment"))) return false; $contact = self::allowed_contact_by_handle($importer, $sender, true); if (!$contact) return false; $message_id = self::message_exists($importer["uid"], $guid); if ($message_id) return $message_id; $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact); if (!$parent_item) return false; $person = self::person_by_handle($author); if (!is_array($person)) { logger("unable to find author details"); return false; } // Fetch the contact id - if we know this contact $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]); // "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora // We would accept this anyhow. if ($positive == "true") $verb = ACTIVITY_LIKE; else $verb = ACTIVITY_DISLIKE; $datarray = array(); $datarray["uid"] = $importer["uid"]; $datarray["contact-id"] = $author_contact["cid"]; $datarray["network"] = $author_contact["network"]; $datarray["author-name"] = $person["name"]; $datarray["author-link"] = $person["url"]; $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]); $datarray["owner-name"] = $contact["name"]; $datarray["owner-link"] = $contact["url"]; $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]); $datarray["guid"] = $guid; $datarray["uri"] = self::get_uri_from_guid($author, $guid); $datarray["type"] = "activity"; $datarray["verb"] = $verb; $datarray["gravity"] = GRAVITY_LIKE; $datarray["parent-uri"] = $parent_item["uri"]; $datarray["object-type"] = ACTIVITY_OBJ_NOTE; $datarray["object"] = self::construct_like_object($importer, $parent_item); $datarray["body"] = self::construct_like_body($contact, $parent_item, $guid); $message_id = item_store($datarray); 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 $parent_item["origin"]) { // Formerly we stored the signed text, the signature and the author in different fields. // We now store the raw data so that we are more flexible. q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')", intval($message_id), dbesc(json_encode($data)) ); // notify others proc_run(PRIORITY_HIGH, "include/notifier.php", "comment-import", $message_id); } return $message_id; } /** * @brief Processes private messages * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool Success? */ private function receive_message($importer, $data) { $guid = notags(unxmlify($data->guid)); $parent_guid = notags(unxmlify($data->parent_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) return false; $conversation = null; $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1", intval($importer["uid"]), dbesc($conversation_guid) ); if($c) $conversation = $c[0]; else { logger("conversation not available."); return false; } $reply = 0; $body = diaspora2bb($text); $message_uri = $author.":".$guid; $person = self::person_by_handle($author); if (!$person) { logger("unable to find author details"); return false; } $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1", dbesc($message_uri), intval($importer["uid"]) ); if($r) { logger("duplicate message already delivered.", LOGGER_DEBUG); return false; } q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) VALUES ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')", intval($importer["uid"]), dbesc($guid), intval($conversation["id"]), dbesc($person["name"]), dbesc($person["photo"]), dbesc($person["url"]), intval($contact["id"]), dbesc($conversation["subject"]), dbesc($body), 0, 1, dbesc($message_uri), dbesc($author.":".$parent_guid), dbesc($created_at) ); q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d", dbesc(datetime_convert()), intval($conversation["id"]) ); return true; } /** * @brief Processes participations - unsupported by now * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool always true */ private function receive_participation($importer, $data) { // I'm not sure if we can fully support this message type return true; } /** * @brief Processes photos - unneeded * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool always true */ private function receive_photo($importer, $data) { // There doesn't seem to be a reason for this function, since the photo data is transmitted in the status message as well return true; } /** * @brief Processes poll participations - unssupported * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool always true */ private function receive_poll_participation($importer, $data) { // We don't support polls by now return true; } /** * @brief Processes incoming profile updates * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool Success */ private function receive_profile($importer, $data) { $author = strtolower(notags(unxmlify($data->author))); $contact = self::contact_by_handle($importer["uid"], $author); if (!$contact) return false; $name = unxmlify($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); $searchable = (unxmlify($data->searchable) == "true"); $nsfw = (unxmlify($data->nsfw) == "true"); $tags = unxmlify($data->tag_string); $tags = explode("#", $tags); $keywords = array(); foreach ($tags as $tag) { $tag = trim(strtolower($tag)); if ($tag != "") $keywords[] = $tag; } $keywords = implode(", ", $keywords); $handle_parts = explode("@", $author); $nick = $handle_parts[0]; if($name === "") $name = $handle_parts[0]; if( preg_match("|^https?://|", $image_url) === 0) $image_url = "http://".$handle_parts[1].$image_url; update_contact_avatar($image_url, $importer["uid"], $contact["id"]); // Generic birthday. We don't know the timezone. The year is irrelevant. $birthday = str_replace("1000", "1901", $birthday); if ($birthday != "") $birthday = datetime_convert("UTC", "UTC", $birthday, "Y-m-d"); // this is to prevent multiple birthday notifications in a single year // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year if(substr($birthday,5) === substr($contact["bd"],5)) $birthday = $contact["bd"]; $r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `bd` = '%s', `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d", dbesc($name), dbesc($nick), dbesc($author), dbesc(datetime_convert()), dbesc($birthday), dbesc($location), dbesc($about), dbesc($keywords), dbesc($gender), intval($contact["id"]), intval($importer["uid"]) ); if ($searchable) { poco_check($contact["url"], $name, NETWORK_DIASPORA, $image_url, $about, $location, $gender, $keywords, "", datetime_convert(), 2, $contact["id"], $importer["uid"]); } $gcontact = array("url" => $contact["url"], "network" => NETWORK_DIASPORA, "generation" => 2, "photo" => $image_url, "name" => $name, "location" => $location, "about" => $about, "birthday" => $birthday, "gender" => $gender, "addr" => $author, "nick" => $nick, "keywords" => $keywords, "hide" => !$searchable, "nsfw" => $nsfw); update_gcontact($gcontact); logger("Profile of contact ".$contact["id"]." stored for user ".$importer["uid"], LOGGER_DEBUG); return true; } /** * @brief Processes incoming friend requests * * @param array $importer Array of the importer user * @param array $contact The contact that send the request */ private function receive_request_make_friend($importer, $contact) { $a = get_app(); if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) { q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d", intval(CONTACT_IS_FRIEND), intval($contact["id"]), intval($importer["uid"]) ); } // send notification $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1", intval($importer["uid"]) ); if($r && !$r[0]["hide-friends"] && !$contact["hidden"] && intval(get_pconfig($importer["uid"], "system", "post_newfriend"))) { $self = q("SELECT * FROM `contact` WHERE `self` AND `uid` = %d LIMIT 1", intval($importer["uid"]) ); // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array if($self && $contact["rel"] == CONTACT_IS_FOLLOWER) { $arr = array(); $arr["uri"] = $arr["parent-uri"] = item_new_uri($a->get_hostname(), $importer["uid"]); $arr["uid"] = $importer["uid"]; $arr["contact-id"] = $self[0]["id"]; $arr["wall"] = 1; $arr["type"] = 'wall'; $arr["gravity"] = 0; $arr["origin"] = 1; $arr["author-name"] = $arr["owner-name"] = $self[0]["name"]; $arr["author-link"] = $arr["owner-link"] = $self[0]["url"]; $arr["author-avatar"] = $arr["owner-avatar"] = $self[0]["thumb"]; $arr["verb"] = ACTIVITY_FRIEND; $arr["object-type"] = ACTIVITY_OBJ_PERSON; $A = "[url=".$self[0]["url"]."]".$self[0]["name"]."[/url]"; $B = "[url=".$contact["url"]."]".$contact["name"]."[/url]"; $BPhoto = "[url=".$contact["url"]."][img]".$contact["thumb"]."[/img][/url]"; $arr["body"] = sprintf(t("%1$s is now friends with %2$s"), $A, $B)."\n\n\n".$Bphoto; $arr["object"] = self::construct_new_friend_object($contact); $arr["last-child"] = 1; $arr["allow_cid"] = $user[0]["allow_cid"]; $arr["allow_gid"] = $user[0]["allow_gid"]; $arr["deny_cid"] = $user[0]["deny_cid"]; $arr["deny_gid"] = $user[0]["deny_gid"]; $i = item_store($arr); if($i) proc_run(PRIORITY_HIGH, "include/notifier.php", "activity", $i); } } } /** * @brief Creates a XML object for a "new friend" message * * @param array $contact Array of the contact * * @return string The XML */ private function construct_new_friend_object($contact) { $objtype = ACTIVITY_OBJ_PERSON; $link = '<link rel="alternate" type="text/html" href="'.$contact["url"].'" />'."\n". '<link rel="photo" type="image/jpeg" href="'.$contact["thumb"].'" />'."\n"; $xmldata = array("object" => array("type" => $objtype, "title" => $contact["name"], "id" => $contact["url"]."/".$contact["name"], "link" => $link)); return xml::from_array($xmldata, $xml, true); } /** * @brief Processes incoming sharing notification * * @param array $importer Array of the importer user * @param object $data The message object * * @return bool Success */ private function receive_contact_request($importer, $data) { $author = unxmlify($data->author); $recipient = unxmlify($data->recipient); if (!$author || !$recipient) return false; // the current protocol version doesn't know these fields // That means that we will assume their existance if (isset($data->following)) $following = (unxmlify($data->following) == "true"); else $following = true; if (isset($data->sharing)) $sharing = (unxmlify($data->sharing) == "true"); else $sharing = true; $contact = self::contact_by_handle($importer["uid"],$author); // perhaps we were already sharing with this person. Now they're sharing with us. // That makes us friends. if ($contact) { if ($following AND $sharing) { logger("Author ".$author." (Contact ".$contact["id"].") wants to have a bidirectional conection.", LOGGER_DEBUG); self::receive_request_make_friend($importer, $contact); // refetch the contact array $contact = self::contact_by_handle($importer["uid"],$author); // If we are now friends, we are sending a share message. // Normally we needn't to do so, but the first message could have been vanished. if (in_array($contact["rel"], array(CONTACT_IS_FRIEND, CONTACT_IS_FOLLOWER))) { $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"])); if($u) { logger("Sending share message to author ".$author." - Contact: ".$contact["id"]." - User: ".$importer["uid"], LOGGER_DEBUG); $ret = self::send_share($u[0], $contact); } } return true; } else { /// @todo Handle all possible variations of adding and retracting of permissions logger("Author ".$author." (Contact ".$contact["id"].") wants to change the relationship: Following: ".$following." - sharing: ".$sharing. "(By now unsupported)", LOGGER_DEBUG); return false; } } if (!$following AND $sharing AND in_array($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 !$sharing) { logger("Author ".$author." doesn't want anything - and we don't know the author. Request is ignored.", LOGGER_DEBUG); return false; } elseif (!$following AND $sharing) { logger("Author ".$author." wants to share with us.", LOGGER_DEBUG); } elseif ($following AND $sharing) { logger("Author ".$author." wants to have a bidirectional conection.", LOGGER_DEBUG); } elseif ($following AND !$sharing) { logger("Author ".$author." wants to listen to us.", LOGGER_DEBUG); } $ret = self::person_by_handle($author); if (!$ret || ($ret["network"] != NETWORK_DIASPORA)) { logger("Cannot resolve diaspora handle ".$author." for ".$recipient); return false; } $batch = (($ret["batch"]) ? $ret["batch"] : implode("/", array_slice(explode("/", $ret["url"]), 0, 3))."/receive/public"); $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`) VALUES (%d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d)", intval($importer["uid"]), dbesc($ret["network"]), dbesc($ret["addr"]), datetime_convert(), dbesc($ret["url"]), dbesc(normalise_link($ret["url"])), dbesc($batch), dbesc($ret["name"]), dbesc($ret["nick"]), dbesc($ret["photo"]), dbesc($ret["pubkey"]), dbesc($ret["notify"]), dbesc($ret["poll"]), 1, 2 ); // find the contact record we just created $contact_record = self::contact_by_handle($importer["uid"],$author); if (!$contact_record) { logger("unable to locate newly created contact record."); return; } logger("Author ".$author." was added as contact number ".$contact_record["id"].".", LOGGER_DEBUG); $def_gid = get_default_group($importer['uid'], $ret["network"]); if(intval($def_gid)) group_add_member($importer["uid"], "", $contact_record["id"], $def_gid); update_contact_avatar($ret["photo"], $importer['uid'], $contact_record["id"], true); if($importer["page-flags"] == PAGE_NORMAL) { logger("Sending intra message for author ".$author.".", LOGGER_DEBUG); $hash = random_string().(string)time(); // Generate a confirm_key $ret = q("INSERT INTO `intro` (`uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`) VALUES (%d, %d, %d, %d, '%s', '%s', '%s')", intval($importer["uid"]), intval($contact_record["id"]), 0, 0, dbesc(t("Sharing notification from Diaspora network")), dbesc($hash), dbesc(datetime_convert()) ); } else { // automatic friend approval logger("Does an automatic friend approval for author ".$author.".", LOGGER_DEBUG); update_contact_avatar($contact_record["photo"],$importer["uid"],$contact_record["id"]); // technically they are sharing with us (CONTACT_IS_SHARING), // 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) $new_relation = CONTACT_IS_FRIEND; elseif (($importer["page-flags"] == PAGE_FREELOVE) AND $sharing) $new_relation = CONTACT_IS_SHARING; else $new_relation = CONTACT_IS_FOLLOWER; $r = q("UPDATE `contact` SET `rel` = %d, `name-date` = '%s', `uri-date` = '%s', `blocked` = 0, `pending` = 0, `writable` = 1 WHERE `id` = %d ", intval($new_relation), dbesc(datetime_convert()), dbesc(datetime_convert()), intval($contact_record["id"]) ); $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"])); if($u) { logger("Sending share message (Relation: ".$new_relation.") to author ".$author." - Contact: ".$contact_record["id"]." - User: ".$importer["uid"], LOGGER_DEBUG); $ret = self::send_share($u[0], $contact_record); // Send the profile data, maybe it weren't transmitted before self::send_profile($importer["uid"], array($contact_record)); } } return true; } /** * @brief Fetches a message with a given guid * * @param string $guid message guid * @param string $orig_author handle of the original post * @param string $author handle of the sharer * * @return array The fetched item */ private function original_item($guid, $orig_author, $author) { // Do we already have this item? $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`, `author-name`, `author-link`, `author-avatar` FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1", dbesc($guid)); if($r) { logger("reshared message ".$guid." already exists on system."); // Maybe it is already a reshared item? // Then refetch the content, if it is a reshare from a reshare. // If it is a reshared post from another network then reformat to avoid display problems with two share elements if (self::is_reshare($r[0]["body"], true)) $r = array(); elseif (self::is_reshare($r[0]["body"], false)) { $r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"])); // Add OEmbed and other information to the body $r[0]["body"] = add_page_info_to_body($r[0]["body"], false, true); return $r[0]; } else return $r[0]; } if (!$r) { $server = "https://".substr($orig_author, strpos($orig_author, "@") + 1); logger("1st try: reshared message ".$guid." will be fetched via SSL from the server ".$server); $item_id = self::store_by_guid($guid, $server); if (!$item_id) { $server = "http://".substr($orig_author, strpos($orig_author, "@") + 1); logger("2nd try: reshared message ".$guid." will be fetched without SLL from the server ".$server); $item_id = self::store_by_guid($guid, $server); } if ($item_id) { $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`, `author-name`, `author-link`, `author-avatar` FROM `item` WHERE `id` = %d AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1", intval($item_id)); if ($r) { // If it is a reshared post from another network then reformat to avoid display problems with two share elements if (self::is_reshare($r[0]["body"], false)) $r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"])); return $r[0]; } } } return false; } /** * @brief Processes a reshare message * * @param array $importer Array of the importer user * @param object $data The message object * @param string $xml The original XML of the message * * @return int the message id */ private function receive_reshare($importer, $data, $xml) { $root_author = notags(unxmlify($data->root_author)); $root_guid = notags(unxmlify($data->root_guid)); $guid = notags(unxmlify($data->guid)); $author = notags(unxmlify($data->author)); $public = notags(unxmlify($data->public)); $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at))); $contact = self::allowed_contact_by_handle($importer, $author, false); if (!$contact) return false; $message_id = self::message_exists($importer["uid"], $guid); if ($message_id) return $message_id; $original_item = self::original_item($root_guid, $root_author, $author); if (!$original_item) return false; $orig_url = App::get_baseurl()."/display/".$original_item["guid"]; $datarray = array(); $datarray["uid"] = $importer["uid"]; $datarray["contact-id"] = $contact["id"]; $datarray["network"] = NETWORK_DIASPORA; $datarray["author-name"] = $contact["name"]; $datarray["author-link"] = $contact["url"]; $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]); $datarray["owner-name"] = $datarray["author-name"]; $datarray["owner-link"] = $datarray["author-link"]; $datarray["owner-avatar"] = $datarray["author-avatar"]; $datarray["guid"] = $guid; $datarray["uri"] = $datarray["parent-uri"] = self::get_uri_from_guid($author, $guid); $datarray["verb"] = ACTIVITY_POST; $datarray["gravity"] = GRAVITY_PARENT; $datarray["object"] = $xml; $prefix = share_header($original_item["author-name"], $original_item["author-link"], $original_item["author-avatar"], $original_item["guid"], $original_item["created"], $orig_url); $datarray["body"] = $prefix.$original_item["body"]."[/share]"; $datarray["tag"] = $original_item["tag"]; $datarray["app"] = $original_item["app"]; $datarray["plink"] = self::plink($author, $guid); $datarray["private"] = (($public == "false") ? 1 : 0); $datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at; $datarray["object-type"] = $original_item["object-type"]; self::fetch_guid($datarray); $message_id = item_store($datarray); if ($message_id) logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG); return $message_id; } /** * @brief Processes retractions * * @param array $importer Array of the importer user * @param array $contact The contact of the item owner * @param object $data The message object * * @return bool success */ private function item_retraction($importer, $contact, $data) { $target_type = notags(unxmlify($data->target_type)); $target_guid = notags(unxmlify($data->target_guid)); $author = notags(unxmlify($data->author)); $person = self::person_by_handle($author); if (!is_array($person)) { logger("unable to find author detail for ".$author); return false; } $r = q("SELECT `id`, `parent`, `parent-uri`, `author-link` FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1", dbesc($target_guid), intval($importer["uid"]) ); if (!$r) return false; // Check if the sender is the thread owner $p = q("SELECT `id`, `author-link`, `origin` FROM `item` WHERE `id` = %d", intval($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"], $contact["url"])) { logger("Thread author ".$p[0]["author-link"]." and item author ".$r[0]["author-link"]." don't fit to expected contact ".$contact["url"], LOGGER_DEBUG); return false; } // Currently we don't have a central deletion function that we could use in this case. The function "item_drop" doesn't work for that case q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' WHERE `id` = %d", dbesc(datetime_convert()), dbesc(datetime_convert()), intval($r[0]["id"]) ); delete_thread($r[0]["id"], $r[0]["parent-uri"]); logger("Deleted target ".$target_guid." (".$r[0]["id"].") from user ".$importer["uid"]." parent: ".$p[0]["id"], LOGGER_DEBUG); // Now check if the retraction needs to be relayed by us if($p[0]["origin"]) { // notify others proc_run(PRIORITY_HIGH, "include/notifier.php", "drop", $r[0]["id"]); } return true; } /** * @brief Receives retraction messages * * @param array $importer Array of the importer user * @param string $sender The sender of the message * @param object $data The message object * * @return bool Success */ private function receive_retraction($importer, $sender, $data) { $target_type = notags(unxmlify($data->target_type)); $contact = self::contact_by_handle($importer["uid"], $sender); if (!$contact) { logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]); return false; } logger("Got retraction for ".$target_type.", sender ".$sender." and user ".$importer["uid"], LOGGER_DEBUG); switch ($target_type) { case "Comment": case "Like": case "Post": // "Post" will be supported in a future version case "Reshare": case "StatusMessage": return self::item_retraction($importer, $contact, $data);; case "Contact": case "Person": /// @todo What should we do with an "unshare"? // Removing the contact isn't correct since we still can read the public items contact_remove($contact["id"]); return true; default: logger("Unknown target type ".$target_type); return false; } return true; } /** * @brief Receives status messages * * @param array $importer Array of the importer user * @param object $data The message object * @param string $xml The original XML of the message * * @return int The message id of the newly created item */ private function receive_status_message($importer, $data, $xml) { $raw_message = unxmlify($data->raw_message); $guid = notags(unxmlify($data->guid)); $author = notags(unxmlify($data->author)); $public = notags(unxmlify($data->public)); $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at))); $provider_display_name = notags(unxmlify($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; $message_id = self::message_exists($importer["uid"], $guid); if ($message_id) return $message_id; $address = array(); if ($data->location) foreach ($data->location->children() AS $fieldname => $data) $address[$fieldname] = notags(unxmlify($data)); $body = diaspora2bb($raw_message); $datarray = array(); // Attach embedded pictures to the body if ($data->photo) { foreach ($data->photo AS $photo) $body = "[img]".unxmlify($photo->remote_photo_path). unxmlify($photo->remote_photo_name)."[/img]\n".$body; $datarray["object-type"] = ACTIVITY_OBJ_PHOTO; } else { $datarray["object-type"] = ACTIVITY_OBJ_NOTE; // Add OEmbed and other information to the body if (!self::is_redmatrix($contact["url"])) $body = add_page_info_to_body($body, false, true); } $datarray["uid"] = $importer["uid"]; $datarray["contact-id"] = $contact["id"]; $datarray["network"] = NETWORK_DIASPORA; $datarray["author-name"] = $contact["name"]; $datarray["author-link"] = $contact["url"]; $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]); $datarray["owner-name"] = $datarray["author-name"]; $datarray["owner-link"] = $datarray["author-link"]; $datarray["owner-avatar"] = $datarray["author-avatar"]; $datarray["guid"] = $guid; $datarray["uri"] = $datarray["parent-uri"] = self::get_uri_from_guid($author, $guid); $datarray["verb"] = ACTIVITY_POST; $datarray["gravity"] = GRAVITY_PARENT; $datarray["object"] = $xml; $datarray["body"] = $body; if ($provider_display_name != "") $datarray["app"] = $provider_display_name; $datarray["plink"] = self::plink($author, $guid); $datarray["private"] = (($public == "false") ? 1 : 0); $datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at; if (isset($address["address"])) $datarray["location"] = $address["address"]; if (isset($address["lat"]) AND isset($address["lng"])) $datarray["coord"] = $address["lat"]." ".$address["lng"]; self::fetch_guid($datarray); $message_id = item_store($datarray); if ($message_id) logger("Stored item ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG); return $message_id; } /* ************************************************************************************** * * Here are all the functions that are needed to transmit data with the Diaspora protocol * * ************************************************************************************** */ /** * @brief returnes the handle of a contact * * @param array $me contact array * * @return string the handle in the format user@domain.tld */ private function my_handle($contact) { if ($contact["addr"] != "") return $contact["addr"]; // Normally we should have a filled "addr" field - but in the past this wasn't the case // So - just in case - we build the the address here. if ($contact["nickname"] != "") $nick = $contact["nickname"]; else $nick = $contact["nick"]; 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); $key_id = base64url_encode(diaspora::my_handle($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 * * @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 $pubkey The public key of the receiver * * @return string The envelope */ private function build_public_message($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"; $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg); $signature = rsa_sign($signable_data,$prvkey); $sig = base64url_encode($signature); $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))); $namespaces = array("" => "https://joindiaspora.com/protocol", "me" => "http://salmon-protocol.org/ns/magic-env"); $magic_env = xml::from_array($xmldata, $xml, false, $namespaces); logger("magic_env: ".$magic_env, LOGGER_DATA); return $magic_env; } /** * @brief Creates the envelope for a private message * * @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 $pubkey The public key of the receiver * * @return string The envelope */ private function build_private_message($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 = random_string(32); $b_inner_aes_key = base64_encode($inner_aes_key); $inner_iv = random_string(16); $b_inner_iv = base64_encode($inner_iv); $outer_aes_key = random_string(32); $b_outer_aes_key = base64_encode($outer_aes_key); $outer_iv = random_string(16); $b_outer_iv = base64_encode($outer_iv); $handle = self::my_handle($user); $padded_data = pkcs5_pad($msg,16); $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv); $b64_data = base64_encode($inner_encrypted); $b64url_data = base64url_encode($b64_data); $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data); $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); $decrypted_header = pkcs5_pad($decrypted_header,16); $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv); $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); $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))); $namespaces = array("" => "https://joindiaspora.com/protocol", "me" => "http://salmon-protocol.org/ns/magic-env"); $magic_env = xml::from_array($xmldata, $xml, false, $namespaces); logger("magic_env: ".$magic_env, LOGGER_DATA); return $magic_env; } /** * @brief Create the envelope for a message * * @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 * @param bool $public Is the message public? * * @return string The message that will be transmitted to other servers */ private function build_message($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 data that will be transmitted is double encoded via "urlencode", strange ... $slap = "xml=".urlencode(urlencode($magic_env)); return $slap; } /** * @brief Creates a signature for a message * * @param array $owner the array of the owner of the message * @param array $message The message that is to be signed * * @return string The signature */ private function signature($owner, $message) { $sigmsg = $message; unset($sigmsg["author_signature"]); unset($sigmsg["parent_author_signature"]); $signed_text = implode(";", $sigmsg); return base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256")); } /** * @brief Transmit a message to a target server * * @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 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 = "") { $a = get_app(); $enabled = intval(get_config("system", "diaspora_enabled")); if(!$enabled) return 200; $logid = random_string(4); $dest_url = (($public_batch) ? $contact["batch"] : $contact["notify"]); if (!$dest_url) { logger("no url for contact: ".$contact["id"]." batch mode =".$public_batch); return 0; } logger("transmit: ".$logid."-".$guid." ".$dest_url); if (!$queue_run && was_recently_delayed($contact["id"])) { $return_code = 0; } else { if (!intval(get_config("system", "diaspora_test"))) { post_url($dest_url."/", $slap); $return_code = $a->get_curl_code(); } else { logger("test_mode"); return 200; } } logger("transmit: ".$logid."-".$guid." returns: ".$return_code); if(!$return_code || (($return_code == 503) && (stristr($a->get_curl_headers(), "retry-after")))) { logger("queue message"); $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1", intval($contact["id"]), dbesc(NETWORK_DIASPORA), dbesc($slap), intval($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, $public_batch); // The message could not be delivered. We mark the contact as "dead" mark_for_death($contact); } } elseif (($return_code >= 200) AND ($return_code <= 299)) { // We successfully delivered a message, the contact is alive unmark_for_death($contact); } return(($return_code) ? $return_code : (-1)); } /** * @brief Build the post xml * * @param string $type The message type * @param array $message The message data * * @return string The post XML */ public static function build_post_xml($type, $message) { $data = array("XML" => array("post" => array($type => $message))); return xml::from_array($data, $xml); } /** * @brief Builds and transmit messages * * @param array $owner the array of the item owner * @param array $contact Target of the communication * @param string $type The message type * @param array $message The message data * @param bool $public_batch Is it a public post? * @param string $guid message guid * @param bool $spool Should the transmission be spooled or transmitted? * * @return int Result of the transmission */ private function build_and_transmit($owner, $contact, $type, $message, $public_batch = false, $guid = "", $spool = false) { $msg = self::build_post_xml($type, $message); logger('message: '.$msg, LOGGER_DATA); logger('send guid '.$guid, LOGGER_DEBUG); // Fallback if the private key wasn't transmitted in the expected field if ($owner['uprvkey'] == "") $owner['uprvkey'] = $owner['prvkey']; $slap = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch); if ($spool) { add_to_queue($contact['id'], NETWORK_DIASPORA, $slap, $public_batch); return true; } else $return_code = self::transmit($owner, $contact, $slap, $public_batch, false, $guid); logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG); return $return_code; } /** * @brief Sends a "share" message * * @param array $owner the array of the item owner * @param array $contact Target of the communication * * @return int The result of the transmission */ public static function send_share($owner,$contact) { $message = array("sender_handle" => self::my_handle($owner), "recipient_handle" => $contact["addr"]); logger("Send share ".print_r($message, true), LOGGER_DEBUG); return self::build_and_transmit($owner, $contact, "request", $message); } /** * @brief sends an "unshare" * * @param array $owner the array of the item owner * @param array $contact Target of the communication * * @return int The result of the transmission */ public static function send_unshare($owner,$contact) { $message = array("post_guid" => $owner["guid"], "diaspora_handle" => self::my_handle($owner), "type" => "Person"); logger("Send unshare ".print_r($message, true), LOGGER_DEBUG); return self::build_and_transmit($owner, $contact, "retraction", $message); } /** * @brief Checks a message body if it is a reshare * * @param string $body The message body that is to be check * @param bool $complete Should it be a complete check or a simple check? * * @return array|bool Reshare details or "false" if no reshare */ public static function is_reshare($body, $complete = true) { $body = trim($body); // Skip if it isn't a pure repeated messages // Does it start with a share? if ((strpos($body, "[share") > 0) AND $complete) return(false); // Does it end with a share? if (strlen($body) > (strrpos($body, "[/share]") + 8)) return(false); $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body); // Skip if there is no shared message in there if ($body == $attributes) return(false); // If we don't do the complete check we quit here if (!$complete) return true; $guid = ""; preg_match("/guid='(.*?)'/ism", $attributes, $matches); if ($matches[1] != "") $guid = $matches[1]; preg_match('/guid="(.*?)"/ism', $attributes, $matches); if ($matches[1] != "") $guid = $matches[1]; if ($guid != "") { $r = q("SELECT `contact-id` FROM `item` WHERE `guid` = '%s' AND `network` IN ('%s', '%s') LIMIT 1", dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA); if ($r) { $ret= array(); $ret["root_handle"] = self::handle_from_contact($r[0]["contact-id"]); $ret["root_guid"] = $guid; return($ret); } } $profile = ""; preg_match("/profile='(.*?)'/ism", $attributes, $matches); if ($matches[1] != "") $profile = $matches[1]; preg_match('/profile="(.*?)"/ism', $attributes, $matches); if ($matches[1] != "") $profile = $matches[1]; $ret= array(); $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile); if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == "")) return(false); $link = ""; preg_match("/link='(.*?)'/ism", $attributes, $matches); if ($matches[1] != "") $link = $matches[1]; preg_match('/link="(.*?)"/ism', $attributes, $matches); if ($matches[1] != "") $link = $matches[1]; $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link); if (($ret["root_guid"] == $link) OR (trim($ret["root_guid"]) == "")) return(false); return($ret); } /** * @brief Create a post (status message or reshare) * * @param array $item The item that will be exported * @param array $owner the array of the item owner * * @return array * 'type' -> Message type ("status_message" or "reshare") * 'message' -> Array of XML elements of the status */ public static function build_status($item, $owner) { $myaddr = self::my_handle($owner); $public = (($item["private"]) ? "false" : "true"); $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d H:i:s \U\T\C'); // Detect a share element and do a reshare if (!$item['private'] AND ($ret = self::is_reshare($item["body"]))) { $message = array("root_diaspora_id" => $ret["root_handle"], "root_guid" => $ret["root_guid"], "guid" => $item["guid"], "diaspora_handle" => $myaddr, "public" => $public, "created_at" => $created, "provider_display_name" => $item["app"]); $type = "reshare"; } else { $title = $item["title"]; $body = $item["body"]; // convert to markdown $body = html_entity_decode(bb2diaspora($body)); // Adding the title if(strlen($title)) $body = "## ".html_entity_decode($title)."\n\n".$body; if ($item["attach"]) { $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item["attach"], $matches, PREG_SET_ORDER); if(cnt) { $body .= "\n".t("Attachments:")."\n"; foreach($matches as $mtch) $body .= "[".$mtch[3]."](".$mtch[1].")\n"; } } $location = array(); if ($item["location"] != "") $location["address"] = $item["location"]; if ($item["coord"] != "") { $coord = explode(" ", $item["coord"]); $location["lat"] = $coord[0]; $location["lng"] = $coord[1]; } $message = array("raw_message" => $body, "location" => $location, "guid" => $item["guid"], "diaspora_handle" => $myaddr, "public" => $public, "created_at" => $created, "provider_display_name" => $item["app"]); // Diaspora rejects messages when they contain a location without "lat" or "lng" if (!isset($location["lat"]) OR !isset($location["lng"])) { unset($message["location"]); } $type = "status_message"; } return array("type" => $type, "message" => $message); } /** * @brief Sends a post * * @param array $item The item that will be exported * @param array $owner the array of the item owner * @param array $contact Target of the communication * @param bool $public_batch Is it a public post? * * @return int The result of the transmission */ public static function send_status($item, $owner, $contact, $public_batch = false) { $status = diaspora::build_status($item, $owner); return self::build_and_transmit($owner, $contact, $status["type"], $status["message"], $public_batch, $item["guid"]); } /** * @brief Creates a "like" object * * @param array $item The item that will be exported * @param array $owner the array of the item owner * * @return array The data for a "like" */ private function construct_like($item, $owner) { $p = q("SELECT `guid`, `uri`, `parent-uri` FROM `item` WHERE `uri` = '%s' LIMIT 1", dbesc($item["thr-parent"])); if(!$p) return false; $parent = $p[0]; $target_type = ($parent["uri"] === $parent["parent-uri"] ? "Post" : "Comment"); $positive = "true"; return(array("positive" => $positive, "guid" => $item["guid"], "target_type" => $target_type, "parent_guid" => $parent["guid"], "author_signature" => "", "diaspora_handle" => self::my_handle($owner))); } /** * @brief Creates the object for a comment * * @param array $item The item that will be exported * @param array $owner the array of the item owner * * @return array The data for a comment */ private function construct_comment($item, $owner) { $p = q("SELECT `guid` FROM `item` WHERE `parent` = %d AND `id` = %d LIMIT 1", intval($item["parent"]), intval($item["parent"]) ); if (!$p) return false; $parent = $p[0]; $text = html_entity_decode(bb2diaspora($item["body"])); return(array("guid" => $item["guid"], "parent_guid" => $parent["guid"], "author_signature" => "", "text" => $text, "diaspora_handle" => self::my_handle($owner))); } /** * @brief Send a like or a comment * * @param array $item The item that will be exported * @param array $owner the array of the item owner * @param array $contact Target of the communication * @param bool $public_batch Is it a public post? * * @return int The result of the transmission */ public static function send_followup($item,$owner,$contact,$public_batch = false) { if($item['verb'] === ACTIVITY_LIKE) { $message = self::construct_like($item, $owner); $type = "like"; } else { $message = self::construct_comment($item, $owner); $type = "comment"; } if (!$message) return false; $message["author_signature"] = self::signature($owner, $message); return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]); } /** * @brief Creates a message from a signature record entry * * @param array $item The item that will be exported * @param array $signature The entry of the "sign" record * * @return string The message */ private function message_from_signature($item, $signature) { // Split the signed text $signed_parts = explode(";", $signature['signed_text']); if ($item["deleted"]) $message = array("parent_author_signature" => "", "target_guid" => $signed_parts[0], "target_type" => $signed_parts[1], "sender_handle" => $signature['signer'], "target_author_signature" => $signature['signature']); elseif ($item['verb'] === ACTIVITY_LIKE) $message = array("positive" => $signed_parts[0], "guid" => $signed_parts[1], "target_type" => $signed_parts[2], "parent_guid" => $signed_parts[3], "parent_author_signature" => "", "author_signature" => $signature['signature'], "diaspora_handle" => $signed_parts[4]); else { // Remove the comment guid $guid = array_shift($signed_parts); // Remove the parent guid $parent_guid = array_shift($signed_parts); // Remove the handle $handle = array_pop($signed_parts); // Glue the parts together $text = implode(";", $signed_parts); $message = array("guid" => $guid, "parent_guid" => $parent_guid, "parent_author_signature" => "", "author_signature" => $signature['signature'], "text" => implode(";", $signed_parts), "diaspora_handle" => $handle); } return $message; } /** * @brief Relays messages (like, comment, retraction) to other servers if we are the thread owner * * @param array $item The item that will be exported * @param array $owner the array of the item owner * @param array $contact Target of the communication * @param bool $public_batch Is it a public post? * * @return int The result of the transmission */ public static function send_relay($item, $owner, $contact, $public_batch = false) { if ($item["deleted"]) return self::send_retraction($item, $owner, $contact, $public_batch, true); elseif ($item['verb'] === ACTIVITY_LIKE) $type = "like"; else $type = "comment"; logger("Got relayable data ".$type." for item ".$item["guid"]." (".$item["id"].")", LOGGER_DEBUG); // fetch the original signature $r = q("SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE `iid` = %d LIMIT 1", intval($item["id"])); if (!$r) { logger("Couldn't fetch signatur for item ".$item["guid"]." (".$item["id"].")", LOGGER_DEBUG); return false; } $signature = $r[0]; // Old way - is used by the internal Friendica functions /// @todo Change all signatur storing functions to the new format if ($signature['signed_text'] AND $signature['signature'] AND $signature['signer']) $message = self::message_from_signature($item, $signature); else {// New way $msg = json_decode($signature['signed_text'], true); $message = array(); if (is_array($msg)) { foreach ($msg AS $field => $data) { if (!$item["deleted"]) { if ($field == "author") $field = "diaspora_handle"; if ($field == "parent_type") $field = "target_type"; } $message[$field] = $data; } } else logger("Signature text for item ".$item["guid"]." (".$item["id"].") couldn't be extracted: ".$signature['signed_text'], LOGGER_DEBUG); } $message["parent_author_signature"] = self::signature($owner, $message); logger("Relayed data ".print_r($message, true), LOGGER_DEBUG); return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]); } /** * @brief Sends a retraction (deletion) of a message, like or comment * * @param array $item The item that will be exported * @param array $owner the array of the item owner * @param array $contact Target of the communication * @param bool $public_batch Is it a public post? * @param bool $relay Is the retraction transmitted from a relay? * * @return int The result of the transmission */ public static function send_retraction($item, $owner, $contact, $public_batch = false, $relay = false) { $itemaddr = self::handle_from_contact($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"; $target_type = "StatusMessage"; } if ($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,$owner['uprvkey'],'sha256'))); logger("Got message ".print_r($message, true), LOGGER_DEBUG); return self::build_and_transmit($owner, $contact, $msg_type, $message, $public_batch, $item["guid"]); } /** * @brief Sends a mail * * @param array $item The item that will be exported * @param array $owner The owner * @param array $contact Target of the communication * * @return int The result of the transmission */ public static function send_mail($item, $owner, $contact) { $myaddr = self::my_handle($owner); $r = q("SELECT * FROM `conv` WHERE `id` = %d AND `uid` = %d LIMIT 1", intval($item["convid"]), intval($item["uid"]) ); if (!$r) { logger("conversation not found."); return; } $cnv = $r[0]; $conv = array( "guid" => $cnv["guid"], "subject" => $cnv["subject"], "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d H:i:s \U\T\C'), "diaspora_handle" => $cnv["creator"], "participant_handles" => $cnv["recips"] ); $body = bb2diaspora($item["body"]); $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d H:i:s \U\T\C'); $signed_text = $item["guid"].";".$cnv["guid"].";".$body.";".$created.";".$myaddr.";".$cnv['guid']; $sig = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256")); $msg = array( "guid" => $item["guid"], "parent_guid" => $cnv["guid"], "parent_author_signature" => $sig, "author_signature" => $sig, "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"], "subject" => $cnv["subject"], "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d H:i:s \U\T\C'), "message" => $msg, "diaspora_handle" => $cnv["creator"], "participant_handles" => $cnv["recips"]); $type = "conversation"; } return self::build_and_transmit($owner, $contact, $type, $message, false, $item["guid"]); } /** * @brief Sends profile data * * @param int $uid The user id */ public static function send_profile($uid, $recips = false) { if (!$uid) return; if (!$recips) $recips = q("SELECT `id`,`name`,`network`,`pubkey`,`notify` FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `rel` != %d", dbesc(NETWORK_DIASPORA), intval($uid), intval(CONTACT_IS_SHARING) ); if (!$recips) return; $r = q("SELECT `profile`.`uid` AS `profile_uid`, `profile`.* , `user`.*, `user`.`prvkey` AS `uprvkey`, `contact`.`addr` FROM `profile` INNER JOIN `user` ON `profile`.`uid` = `user`.`uid` INNER JOIN `contact` ON `profile`.`uid` = `contact`.`uid` WHERE `user`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self` LIMIT 1", intval($uid) ); if (!$r) return; $profile = $r[0]; $handle = $profile["addr"]; $first = ((strpos($profile['name'],' ') ? trim(substr($profile['name'],0,strpos($profile['name'],' '))) : $profile['name'])); $last = (($first === $profile['name']) ? '' : trim(substr($profile['name'], strlen($first)))); $large = App::get_baseurl().'/photo/custom/300/'.$profile['uid'].'.jpg'; $medium = App::get_baseurl().'/photo/custom/100/'.$profile['uid'].'.jpg'; $small = App::get_baseurl().'/photo/custom/50/' .$profile['uid'].'.jpg'; $searchable = (($profile['publish'] && $profile['net-publish']) ? 'true' : 'false'); if ($searchable === 'true') { $dob = '1000-00-00'; if (($profile['dob']) && ($profile['dob'] != '0000-00-00')) $dob = ((intval($profile['dob'])) ? intval($profile['dob']) : '1000') .'-'. datetime_convert('UTC','UTC',$profile['dob'],'m-d'); $about = $profile['about']; $about = strip_tags(bbcode($about)); $location = formatted_location($profile); $tags = ''; if ($profile['pub_keywords']) { $kw = str_replace(',',' ',$profile['pub_keywords']); $kw = str_replace(' ',' ',$kw); $arr = explode(' ',$profile['pub_keywords']); if (count($arr)) { for($x = 0; $x < 5; $x ++) { if (trim($arr[$x])) $tags .= '#'. trim($arr[$x]) .' '; } } } $tags = trim($tags); } $message = array("diaspora_handle" => $handle, "first_name" => $first, "last_name" => $last, "image_url" => $large, "image_url_medium" => $medium, "image_url_small" => $small, "birthday" => $dob, "gender" => $profile['gender'], "bio" => $about, "location" => $location, "searchable" => $searchable, "tag_string" => $tags); foreach($recips as $recip) { logger("Send updated profile data for user ".$uid." to contact ".$recip["id"], LOGGER_DEBUG); self::build_and_transmit($profile, $recip, "profile", $message, false, "", true); } } /** * @brief Stores the signature for likes that are created on our system * * @param array $contact The contact array of the "like" * @param int $post_id The post id of the "like" * * @return bool Success */ public static function store_like_signature($contact, $post_id) { // Is the contact the owner? Then fetch the private key if (!$contact['self'] OR ($contact['uid'] == 0)) { logger("No owner post, so not storing signature", LOGGER_DEBUG); return false; } $r = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($contact['uid'])); if(!$r) return false; $contact["uprvkey"] = $r[0]['prvkey']; $r = q("SELECT * FROM `item` WHERE `id` = %d LIMIT 1", intval($post_id)); if (!$r) return false; if (!in_array($r[0]["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) return false; $message = self::construct_like($r[0], $contact); $message["author_signature"] = self::signature($contact, $message); // In the future we will store the signature more flexible to support new fields. // Right now we cannot change this since old Friendica versions (prior to 3.5) can only handle this format. // (We are transmitting this data here via DFRN) $signed_text = $message["positive"].";".$message["guid"].";".$message["target_type"].";". $message["parent_guid"].";".$message["diaspora_handle"]; q("INSERT INTO `sign` (`iid`,`signed_text`,`signature`,`signer`) VALUES (%d,'%s','%s','%s')", intval($post_id), dbesc($signed_text), dbesc($message["author_signature"]), dbesc($message["diaspora_handle"]) ); // This here will replace the lines above, once Diaspora changed its protocol //q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')", // intval($message_id), // dbesc(json_encode($message)) //); logger('Stored diaspora like signature'); return true; } /** * @brief Stores the signature for comments that are created on our system * * @param array $item The item array of the comment * @param array $contact The contact array of the item owner * @param string $uprvkey The private key of the sender * @param int $message_id The message id of the comment * * @return bool Success */ public static function store_comment_signature($item, $contact, $uprvkey, $message_id) { if ($uprvkey == "") { logger('No private key, so not storing comment signature', LOGGER_DEBUG); return false; } $contact["uprvkey"] = $uprvkey; $message = self::construct_comment($item, $contact); $message["author_signature"] = self::signature($contact, $message); // In the future we will store the signature more flexible to support new fields. // Right now we cannot change this since old Friendica versions (prior to 3.5) can only handle this format. // (We are transmitting this data here via DFRN) $signed_text = $message["guid"].";".$message["parent_guid"].";". $message["text"].";".$message["diaspora_handle"]; q("INSERT INTO `sign` (`iid`,`signed_text`,`signature`,`signer`) VALUES (%d,'%s','%s','%s')", intval($message_id), dbesc($signed_text), dbesc($message["author_signature"]), dbesc($message["diaspora_handle"]) ); // This here will replace the lines above, once Diaspora changed its protocol //q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')", // intval($message_id), // dbesc(json_encode($message)) //); logger('Stored diaspora comment signature'); return true; } } ?>