decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
*/
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);
/**
* $decrypted now contains something like
*
*
* 8e+G2+ET8l5BPuW0sVTnQw==
* UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=
* galaxor@diaspora.priateship.org
*
*/
logger('decrypted: '.$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' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
}
/**
* @brief Dispatches public messages and find the fitting receivers
*
* @param array $msg The post that will be dispatched
*
* @return bool Was the message accepted?
*/
public static function dispatch_public($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);
$item_id = self::dispatch($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 $item_id;
}
/**
* @brief Dispatches the different message types to the different functions
*
* @param array $importer Array of the importer user
* @param array $msg The post that will be dispatched
*
* @return bool Was the message accepted?
*/
public static function dispatch($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, $fields);
case "conversation":
return self::receive_conversation($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, $fields);
case "request":
return self::receive_request($importer, $fields);
case "reshare":
return self::receive_reshare($importer, $fields);
case "retraction":
return self::receive_retraction($importer, $sender, $fields);
case "status_message":
return self::receive_status_message($importer, $fields);
default:
logger("Unknown message type ".$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))
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 = $type;
// All retractions are handled identically from now on.
// In the new version there will only be "retraction".
if (in_array($type, array("signed_retraction", "relayable_retraction")))
$type = "retraction";
$fields = new SimpleXMLElement("<".$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")
$author_signature = base64_decode($entry);
elseif ($fieldname == "parent_author_signature")
$parent_author_signature = base64_decode($entry);
elseif ($fieldname != "target_author_signature") {
if ($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($author_signature))
return false;
if (isset($parent_author_signature)) {
$key = self::key($msg["author"]);
if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256"))
return false;
}
$key = self::key($fields->author);
return rsa_verify($signed_data, $author_signature, $key, "sha256");
}
/**
* @brief Fetches the public key for a given handle
*
* @param string $handle The handle
*
* @return string The public key
*/
private function key($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 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, $update = false) {
/// @todo Remove this function from include/network.php
if($update) {
$r = q("UPDATE `fcontact` SET
`name` = '%s',
`photo` = '%s',
`request` = '%s',
`nick` = '%s',
`addr` = '%s',
`batch` = '%s',
`notify` = '%s',
`poll` = '%s',
`confirm` = '%s',
`alias` = '%s',
`pubkey` = '%s',
`updated` = '%s'
WHERE `url` = '%s' AND `network` = '%s'",
dbesc($arr["name"]),
dbesc($arr["photo"]),
dbesc($arr["request"]),
dbesc($arr["nick"]),
dbesc($arr["addr"]),
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 {
$r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`,
`batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`)
VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",
dbesc($arr["url"]),
dbesc($arr["name"]),
dbesc($arr["photo"]),
dbesc($arr["request"]),
dbesc($arr["nick"]),
dbesc($arr["addr"]),
dbesc($arr["batch"]),
dbesc($arr["notify"]),
dbesc($arr["poll"]),
dbesc($arr["confirm"]),
dbesc($arr["network"]),
dbesc($arr["alias"]),
dbesc($arr["pubkey"]),
dbesc(datetime_convert())
);
}
return $r;
}
public static function handle_from_contact($contact_id) {
$handle = False;
logger("contact id is ".$contact_id, LOGGER_DEBUG);
$r = q("SELECT `network`, `addr`, `self`, `url`, `nick` FROM `contact` WHERE `id` = %d",
intval($contact_id)
);
if($r) {
$contact = $r[0];
logger("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], LOGGER_DEBUG);
if($contact['addr'] != "")
$handle = $contact['addr'];
elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
$baseurl_start = strpos($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 $handle;
}
private function contact_by_handle($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 $r[0];
return false;
}
private function post_allow($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;
}
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 $contact;
}
private function message_exists($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 true;
}
return false;
}
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"]);
}
private function fetch_guid_sub($match, $item) {
if (!self::store_by_guid($match[1], $item["author-link"]))
self::store_by_guid($match[1], $item["owner-link"]);
}
private function store_by_guid($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($msg);
}
private function message($guid, $server, $level = 0) {
if ($level > 5)
return false;
// This will work for Diaspora and newer Friendica servers
$source_url = $server."/p/".$guid.".xml";
$x = fetch_url($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
return self::message($source_xml->post->reshare->root_guid, $server, ++$level);
} elseif ($source_xml->getName() == "reshare") {
// Reshare of a reshare - new Diaspora version
return self::message($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)
return false;
$msg = array("message" => $x, "author" => $author);
$msg["key"] = self::key($msg["author"]);
return $msg;
}
private function parent_item($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 $r[0];
}
}
private function author_contact_by_url($contact, $person, $uid) {
$r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
dbesc(normalise_link($person["url"])), intval($uid));
if ($r) {
$cid = $r[0]["id"];
$network = $r[0]["network"];
} else {
$cid = $contact["id"];
$network = NETWORK_DIASPORA;
}
return (array("cid" => $cid, "network" => $network));
}
public static function is_redmatrix($url) {
return(strstr($url, "/channel/"));
}
private function plink($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/".$guid;
}
private function receive_account_deletion($importer, $data) {
$author = notags(unxmlify($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;
}
private function receive_comment($importer, $sender, $data) {
$guid = notags(unxmlify($data->guid));
$parent_guid = notags(unxmlify($data->parent_guid));
$text = unxmlify($data->text);
$author = notags(unxmlify($data->author));
$contact = self::allowed_contact_by_handle($importer, $sender, true);
if (!$contact)
return false;
if (self::message_exists($importer["uid"], $guid))
return false;
$parent_item = self::parent_item($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"] = $author.":".$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;
$datarray["object"] = json_encode($data);
$datarray["body"] = diaspora2bb($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("php", "include/notifier.php", "comment-import", $message_id);
}
return $message_id;
}
private function receive_conversation_message($importer, $contact, $data, $msg, $mesg) {
$guid = notags(unxmlify($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" => $person["thumb"],
"verb" => ACTIVITY_POST,
"otype" => "mail"
));
}
private function receive_conversation($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(datetime_convert("UTC", "UTC", $created_at)),
dbesc(datetime_convert()),
dbesc($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, $mesg);
return true;
}
private function construct_like_body($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, $plink);
}
private function construct_like_object($importer, $parent_item) {
$objtype = ACTIVITY_OBJ_NOTE;
$link = '';
$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, $xml, true);
}
private function receive_like($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;
if (self::message_exists($importer["uid"], $guid))
return false;
$parent_item = self::parent_item($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"] = $author.":".$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("php", "include/notifier.php", "comment-import", $message_id);
}
return $message_id;
}
private function receive_message($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;
}
private function receive_participation($importer, $data) {
// I'm not sure if we can fully support this message type
return true;
}
private function receive_photo($importer, $data) {
// There doesn't seem to be a reason for this function, since the photo data is transmitted in the status message as well
return true;
}
private function receive_poll_participation($importer, $data) {
// We don't support polls by now
return true;
}
private function receive_profile($importer, $data) {
$author = notags(unxmlify($data->author));
$contact = self::contact_by_handle($importer["uid"], $author);
if (!$contact)
return;
$name = unxmlify($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;
}
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"] = "\n";
$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("php", "include/notifier.php", "activity", $i);
}
}
}
private function receive_request($importer, $data) {
$author = unxmlify($data->author);
$recipient = unxmlify($data->recipient);
if (!$author || !$recipient)
return;
$contact = self::contact_by_handle($importer["uid"],$author);
if($contact) {
// perhaps we were already sharing with this person. Now they're sharing with us.
// That makes us friends.
self::receive_request_make_friend($importer, $contact);
return true;
}
$ret = self::person_by_handle($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;
}
$g = q("SELECT `def_gid` FROM `user` WHERE `uid` = %d LIMIT 1",
intval($importer["uid"])
);
if($g && intval($g[0]["def_gid"]))
group_add_member($importer["uid"], "", $contact_record["id"], $g[0]["def_gid"]);
if($importer["page-flags"] == PAGE_NORMAL) {
$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
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)
$new_relation = CONTACT_IS_FRIEND;
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)
$ret = self::send_share($u[0], $contact_record);
}
return true;
}
private function original_item($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, since there can be many side effects with reshared posts from other networks or reshares from reshares
if (self::is_reshare($r[0]["body"]))
$r = array();
else
return $r[0];
}
if (!$r) {
$server = "https://".substr($orig_author, strpos($orig_author, "@") + 1);
logger("1st try: reshared message ".$guid." will be fetched from original 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 from original server: ".$server);
$item_id = self::store_by_guid($guid, $server);
}
// Deactivated by now since there is a risk that someone could manipulate postings through this method
/* if (!$item_id) {
$server = "https://".substr($author, strpos($author, "@") + 1);
logger("3rd try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
$item_id = self::store_by_guid($guid, $server);
}
if (!$item_id) {
$server = "http://".substr($author, strpos($author, "@") + 1);
logger("4th try: reshared message ".$guid." will be fetched from sharer's 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)
return $r[0];
}
}
return false;
}
private function receive_reshare($importer, $data) {
$root_author = notags(unxmlify($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));
$created_at = notags(unxmlify($data->created_at));
$contact = self::allowed_contact_by_handle($importer, $author, false);
if (!$contact)
return false;
if (self::message_exists($importer["uid"], $guid))
return false;
$original_item = self::original_item($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"] = $author.":".$guid;
$datarray["verb"] = ACTIVITY_POST;
$datarray["gravity"] = GRAVITY_PARENT;
$datarray["object"] = json_encode($data);
$prefix = share_header($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"] = datetime_convert("UTC", "UTC", $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 $message_id;
}
private function item_retraction($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;
// Only delete it if the author really fits
if (!link_compare($r[0]["author-link"], $person["url"])) {
logger("Item author ".$r[0]["author-link"]." doesn't fit to expected contact ".$person["url"], LOGGER_DEBUG);
return false;
}
// Check if the sender is the thread owner
$p = q("SELECT `author-link`, `origin` FROM `item` WHERE `id` = %d",
intval($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." from user ".$importer["uid"], LOGGER_DEBUG);
// Now check if the retraction needs to be relayed by us
if($p[0]["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` (`retract_iid`,`signed_text`) VALUES (%d,'%s')",
intval($r[0]["id"]),
dbesc(json_encode($data))
);
// notify others
proc_run("php", "include/notifier.php", "drop", $r[0]["id"]);
}
}
private function receive_retraction($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, $data);;
case "Person":
/// @todo What should we do with an "unshare"?
// Removing the contact isn't correct since we still can read the public items
//contact_remove($contact["id"]);
return true;
default:
logger("Unknown target type ".$target_type);
return false;
}
return true;
}
private function receive_status_message($importer, $data) {
$raw_message = unxmlify($data->raw_message);
$guid = notags(unxmlify($data->guid));
$author = notags(unxmlify($data->author));
$public = notags(unxmlify($data->public));
$created_at = notags(unxmlify($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;
if (self::message_exists($importer["uid"], $guid))
return false;
$address = array();
if ($data->location)
foreach ($data->location->children() AS $fieldname => $data)
$address[$fieldname] = notags(unxmlify($data));
$body = diaspora2bb($raw_message);
$datarray = array();
if ($data->photo) {
foreach ($data->photo AS $photo)
$body = "[img]".$photo->remote_photo_path.$photo->remote_photo_name."[/img]\n".$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"] = $author.":".$guid;
$datarray["verb"] = ACTIVITY_POST;
$datarray["gravity"] = GRAVITY_PARENT;
$datarray["object"] = json_encode($data);
$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"] = datetime_convert("UTC", "UTC", $created_at);
if (isset($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 $message_id;
}
/******************************************************************************************
* Here are all the functions that are needed to transmit data with the Diaspora protocol *
******************************************************************************************/
private function my_handle($me) {
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.
return $me["nickname"]."@".substr(App::get_baseurl(), strpos(App::get_baseurl(),"://") + 3);
}
private function build_public_message($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" => "base64url",
"me:alg" => "RSA-SHA256",
"me:data" => $data,
"@attributes" => array("type" => "application/xml"),
"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 $magic_env;
}
private function build_private_message($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" => "base64url",
"me:alg" => "RSA-SHA256",
"me:data" => $data,
"@attributes" => array("type" => "application/xml"),
"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 $magic_env;
}
private function build_message($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 $slap;
}
private function signature($owner, $message) {
$sigmsg = $message;
unset($sigmsg["author_signature"]);
unset($sigmsg["parent_author_signature"]);
$signed_text = implode(";", $sigmsg);
return base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
}
public static function transmit($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, $public_batch);
}
}
return(($return_code) ? $return_code : (-1));
}
private function build_and_transmit($owner, $contact, $type, $message, $public_batch = false, $guid = "") {
$data = array("XML" => array("post" => array($type => $message)));
$msg = xml::from_array($data, $xml);
logger('message: '.$msg, LOGGER_DATA);
logger('send guid '.$guid, LOGGER_DEBUG);
$slap = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
$return_code = self::transmit($owner, $contact, $slap, $public_batch, false, $guid);
logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG);
return $return_code;
}
public static function send_share($owner,$contact) {
$message = array("sender_handle" => self::my_handle($owner),
"recipient_handle" => $contact["addr"]);
return self::build_and_transmit($owner, $contact, "request", $message);
}
public static function send_unshare($owner,$contact) {
$message = array("post_guid" => $owner["guid"],
"diaspora_handle" => self::my_handle($owner),
"type" => "Person");
return self::build_and_transmit($owner, $contact, "retraction", $message);
}
private function is_reshare($body) {
$body = trim($body);
// Skip if it isn't a pure repeated messages
// Does it start with a share?
if (strpos($body, "[share") > 0)
return(false);
// Does it end with a share?
if (strlen($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);
$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"] == $link) OR ($ret["root_guid"] == ""))
return(false);
return($ret);
}
public static function send_status($item, $owner, $contact, $public_batch = false) {
$myaddr = self::my_handle($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" => $item["app"]);
if (count($location) == 0)
unset($message["location"]);
$type = "status_message";
}
return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
}
private function construct_like($item, $owner) {
$myaddr = self::my_handle($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" => $authorsig,
"diaspora_handle" => $myaddr));
}
private function construct_comment($item, $owner) {
$myaddr = self::my_handle($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" => $myaddr));
}
public static function send_followup($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, $item["guid"]);
}
private function message_from_signatur($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 $message;
}
public static function send_relay($item, $owner, $contact, $public_batch = false) {
if ($item["deleted"]) {
$sql_sign_id = "retract_iid";
$type = "relayable_retraction";
} elseif ($item['verb'] === ACTIVITY_LIKE) {
$sql_sign_id = "iid";
$type = "like";
} else {
$sql_sign_id = "iid";
$type = "comment";
}
// fetch the original signature
$r = q("SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE `".$sql_sign_id."` = %d LIMIT 1",
intval($item["id"]));
if (!$r)
return self::send_followup($item, $owner, $contact, $public_batch);
$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'])
$message = self::message_from_signatur($item, $signature);
else {// New way
$msg = json_decode($signature['signed_text'], true);
$message = array();
foreach ($msg AS $field => $data) {
if (!$item["deleted"]) {
if ($field == "author")
$field = "diaspora_handle";
if ($field == "parent_type")
$field = "target_type";
}
$message[$field] = $data;
}
}
if ($item["deleted"]) {
$signed_text = $message["target_guid"].';'.$message["target_type"];
$message["parent_author_signature"] = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
} else
$message["parent_author_signature"] = self::signature($owner, $message);
logger("Relayed data ".print_r($message, true), LOGGER_DEBUG);
return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
}
public static function send_retraction($item, $owner, $contact, $public_batch = false) {
$myaddr = self::my_handle($owner);
// 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";
}
$signed_text = $item["guid"].";".$target_type;
$message = array("target_guid" => $item['guid'],
"target_type" => $target_type,
"sender_handle" => $myaddr,
"target_author_signature" => base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')));
return self::build_and_transmit($owner, $contact, $msg_type, $message, $public_batch, $item["guid"]);
}
public static function send_mail($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"]);
}
}
?>