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hubzilla_ynh/sources/addon/diaspora/inbound.php

2285 lines
68 KiB
PHP
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Updated Huzilla and addons to version 1.6
2016-05-17 19:05:14 +02:00
<?php
function diaspora_dispatch_public($msg) {
$sys_disabled = true;
if(! get_config('system','disable_discover_tab')) {
$sys_disabled = get_config('system','disable_diaspora_discover_tab');
}
$sys = (($sys_disabled) ? null : get_sys_channel());
// find everybody following or allowing this author
$r = q("SELECT * from channel where channel_id in ( SELECT abook_channel from abook left join xchan on abook_xchan = xchan_hash WHERE xchan_network like '%%diaspora%%' and xchan_addr = '%s' ) and channel_removed = 0 ",
dbesc($msg['author'])
);
// also need to look for those following public streams
if($r) {
foreach($r as $rr) {
logger('diaspora_public: delivering to: ' . $rr['channel_name'] . ' (' . $rr['channel_address'] . ') ');
diaspora_dispatch($rr,$msg);
}
}
else {
if(! $sys)
logger('diaspora_public: no subscribers');
}
if($sys) {
$sys['system'] = true;
logger('diaspora_public: delivering to sys.');
diaspora_dispatch($sys,$msg);
}
}
function diaspora_dispatch($importer,$msg) {
$ret = 0;
if(! array_key_exists('system',$importer))
$importer['system'] = false;
$host = substr($msg['author'],strpos($msg['author'],'@')+1);
$ssl = ((array_key_exists('HTTPS',$_SERVER) && strtolower($_SERVER['HTTPS']) === 'on') ? true : false);
$url = (($ssl) ? 'https://' : 'http://') . $host;
q("update site set site_dead = 0, site_update = '%s' where site_type = %d and site_url = '%s'",
dbesc(datetime_convert()),
intval(SITE_TYPE_NOTZOT),
dbesc($url)
);
$allowed = get_pconfig($importer['channel_id'],'system','diaspora_allowed');
if(! intval($allowed)) {
logger('mod-diaspora: disallowed for channel ' . $importer['channel_name']);
return;
}
// php doesn't like dashes in variable names
// I doubt we need this any more. The Cubbi.es activity stream photo thing died in 2011
$msg['message'] = str_replace(
array('<activity_streams-photo>','</activity_streams-photo>'),
array('<asphoto>','</asphoto>'),
$msg['message']);
// $parsed_xml = parse_xml_string($msg['message'],false);
$parsed_xml = xml2array($msg['message'],false,0,'tag');
if($parsed_xml) {
if(array_key_exists('xml',$parsed_xml) && array_key_exists('post',$parsed_xml['xml']))
$xmlbase = $parsed_xml['xml']['post'];
else
$xmlbase = $parsed_xml;
}
// logger('diaspora_dispatch: ' . print_r($xmlbase,true), LOGGER_DATA);
if($xmlbase['request']) {
$ret = diaspora_request($importer,$xmlbase['request']);
}
if($xmlbase['contact']) {
$ret = diaspora_request($importer,$xmlbase['contact']);
}
elseif($xmlbase['status_message']) {
$ret = diaspora_post($importer,$xmlbase['status_message'],$msg);
}
elseif($xmlbase['profile']) {
$ret = diaspora_profile($importer,$xmlbase['profile'],$msg);
}
elseif($xmlbase['comment']) {
$ret = diaspora_comment($importer,$xmlbase['comment'],$msg);
}
elseif($xmlbase['like']) {
$ret = diaspora_like($importer,$xmlbase['like'],$msg);
}
elseif($xmlbase['asphoto']) {
$ret = diaspora_asphoto($importer,$xmlbase['asphoto'],$msg);
}
elseif($xmlbase['reshare']) {
$ret = diaspora_reshare($importer,$xmlbase['reshare'],$msg);
}
elseif($xmlbase['retraction']) {
$ret = diaspora_retraction($importer,$xmlbase['retraction'],$msg);
}
elseif($xmlbase['signed_retraction']) {
$ret = diaspora_retraction($importer,$xmlbase['signed_retraction'],$msg);
}
elseif($xmlbase['relayable_retraction']) {
$ret = diaspora_retraction($importer,$xmlbase['relayable_retraction'],$msg);
}
elseif($xmlbase['photo']) {
$ret = diaspora_photo($importer,$xmlbase['photo'],$msg);
}
elseif($xmlbase['conversation']) {
$ret = diaspora_conversation($importer,$xmlbase['conversation'],$msg);
}
elseif($xmlbase['message']) {
$ret = diaspora_message($importer,$xmlbase['message'],$msg);
}
elseif($xmlbase['participation']) {
$ret = diaspora_participation($importer,$xmlbase['participation'],$msg);
}
elseif($xmlbase['account_deletion']) {
$ret = diaspora_account_deletion($importer,$xmlbase['account_deletion'],$msg);
}
elseif($xmlbase['poll_participation']) {
$ret = diaspora_poll_participation($importer,$xmlbase['poll_participation'],$msg);
}
else {
logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true));
}
return $ret;
}
function diaspora_is_blacklisted($s) {
if(! check_siteallowed($s)) {
logger('blacklisted site: ' . $s);
return true;
}
return false;
}
/**
*
* diaspora_decode($importer,$xml,$format)
* array $importer -> from user table
* string $xml -> urldecoded Diaspora salmon
* string $format 'legacy', 'salmon', or 'json'
*
* Returns array
* 'message' -> decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
*
* Author and key are used elsewhere to save a lookup for verifying replies and likes
*/
function diaspora_decode($importer,$xml,$format) {
$public = false;
if($format === 'json') {
$json = json_decode($xml,true);
if($json['aes_key']) {
$key_bundle = '';
$result = openssl_private_decrypt(base64_decode($json['aes_key']),$key_bundle,$importer['channel_prvkey']);
if(! $result) {
logger('decrypting key_bundle for ' . $importer['channel_address'] . ' failed: ' . $json['aes_key'],LOGGER_NORMAL, LOG_ERR);
http_status_exit(400);
}
$jkey = json_decode($key_bundle,true);
$xml = AES256CBC_decrypt(base64_decode($json['encrypted_magic_envelope']),base64_decode($jkey['key']),base64_decode($jkey['iv']));
if(! $xml) {
logger('decrypting magic_envelope for ' . $importer['channel_address'] . ' failed: ' . $json['aes_key'],LOGGER_NORMAL, LOG_ERR);
http_status_exit(400);
}
}
}
$basedom = parse_xml_string($xml);
if($format !== 'legacy') {
$children = $basedom->children('http://salmon-protocol.org/ns/magic-env');
$public = true;
$author_link = str_replace('acct:','',base64url_decode($children->key_id));
/**
SimpleXMLElement Object
(
[encoding] => base64url
[alg] => RSA-SHA256
[data] => ((base64url-encoded payload message))
[sig] => ((the RSA-SHA256 signature of the above data))
[key_id] => ((base64url-encoded Alice's diaspora ID))
)
**/
}
else {
$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['channel_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);
$decrypted = AES256CBC_decrypt($ciphertext,$outer_key,$outer_iv);
/**
* $decrypted now contains something like
*
* <decrypted_header>
* <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
* <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
***** OBSOLETE
* <author>
* <name>Ryan Hughes</name>
* <uri>acct:galaxor@diaspora.pirateship.org</uri>
* </author>
***** CURRENT/LEGACY
* <author_id>galaxor@diaspora.pirateship.org</author_id>
***** END DIFFS
* </decrypted_header>
*/
logger('decrypted: ' . $decrypted, LOGGER_DATA);
$idom = parse_xml_string($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('mod-diaspora: unable to locate salmon data in xml ', LOGGER_NORMAL, LOG_ERR);
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,false) . '.' . base64url_encode($encoding,false) . '.' . base64url_encode($alg,false);
// decode the data
$data = base64url_decode($data);
if(($format === 'legacy') && (! $public)) {
// Decode the encrypted blob
$final_msg = AES256CBC_decrypt(base64_decode($data),$inner_aes_key,$inner_iv);
}
else {
$final_msg = $data;
}
if(! $author_link) {
logger('mod-diaspora: 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('mod-diaspora: Fetching key for ' . $author_link );
$key = get_diaspora_key($author_link);
if(! $key) {
logger('mod-diaspora: Could not retrieve author key.', LOGGER_NORMAL, LOG_WARNING);
http_status_exit(400);
}
$verify = rsa_verify($signed_data,$signature,$key);
if(! $verify) {
logger('mod-diaspora: Message did not verify. Discarding.', LOGGER_NORMAL, LOG_ERR);
http_status_exit(400);
}
logger('mod-diaspora: Message verified.');
return array('message' => $final_msg, 'author' => $author_link, 'key' => $key);
}
/* sender is now sharing with recipient */
function diaspora_request($importer,$xml) {
$a = get_app();
$sender_handle = unxmlify(diaspora_get_author($xml));
$recipient_handle = unxmlify(diaspora_get_recipient($xml));
// @TODO - map these perms to $newperms below
if(array_key_exists('following',$xml) && array_key_exists('sharing',$xml)) {
$following = ((unxmlify($xml['following'])) === 'true' ? true : false);
$sharing = ((unxmlify($xml['sharing'])) === 'true' ? true : false);
}
else {
$following = true;
$sharing = true;
}
if((! $sender_handle) || (! $recipient_handle))
return;
// Do we already have an abook record?
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$sender_handle);
if($contact && $contact['abook_id']) {
// perhaps we were already sharing with this person. Now they're sharing with us.
// That makes us friends. Maybe.
// Please note some of these permissions such as PERMS_R_PAGES are impossible for Disapora.
// They cannot authenticate to our system.
$newperms = PERMS_R_STREAM|PERMS_R_PROFILE|PERMS_R_PHOTOS|PERMS_R_ABOOK|PERMS_W_STREAM|PERMS_W_COMMENT|PERMS_W_MAIL|PERMS_W_CHAT|PERMS_R_STORAGE|PERMS_R_PAGES;
$abook_instance = $contact['abook_instance'];
if($abook_instance)
$abook_instance .= ',';
$abook_instance .= z_root();
$r = q("update abook set abook_their_perms = %d, abook_instance = '%s' where abook_id = %d and abook_channel = %d",
intval($newperms),
dbesc($abook_instance),
intval($contact['abook_id']),
intval($importer['channel_id'])
);
return;
}
$ret = find_diaspora_person_by_handle($sender_handle);
if((! $ret) || (! strstr($ret['xchan_network'],'diaspora'))) {
logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle);
return;
}
//FIXME
/*
if(feature_enabled($channel['channel_id'],'premium_channel')) {
$myaddr = $importer['channel_address'] . '@' . App::get_hostname();
$cnv = random_string();
$mid = random_string();
$msg = t('You have started sharing with a $Projectname premium channel.');
$msg .= t('$Projectname premium channels are not available for sharing with Diaspora members. This sharing request has been blocked.') . "\r";
$msg .= t('Please do not reply to this message, as this channel is not sharing with you and any reply will not be seen by the recipient.') . "\r";
$created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
$signed_text = $mid . ';' . $cnv . ';' . $msg . ';'
. $created . ';' . $myaddr . ';' . $cnv;
$sig = base64_encode(rsa_sign($signed_text,$importer['channel_prvkey'],'sha256'));
$conv = array(
'guid' => xmlify($cnv),
'subject' => xmlify(t('Sharing request failed.')),
'created_at' => xmlify($created),
'diaspora_handle' => xmlify($myaddr),
'participant_handles' => xmlify($myaddr . ';' . $sender_handle)
);
$msg = array(
'guid' => xmlify($mid),
'parent_guid' => xmlify($cnv),
'parent_author_signature' => xmlify($sig),
'author_signature' => xmlify($sig),
'text' => xmlify($msg),
'created_at' => xmlify($created),
'diaspora_handle' => xmlify($myaddr),
'conversation_guid' => xmlify($cnv)
);
$conv['messages'] = array($msg);
$tpl = get_markup_template('diaspora_conversation.tpl','addon/diaspora');
$xmsg = replace_macros($tpl, array('$conv' => $conv));
$slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($xmsg,$importer,$ret,$importer['channel_prvkey'],$ret['xchan_pubkey'],false)));
$qi = diaspora_queue($importer,$ret,$slap,false);
return $qi;
}
*/
// End FIXME
$role = get_pconfig($importer['channel_id'],'system','permissions_role');
if($role) {
$x = get_role_perms($role);
if($x['perms_auto'])
$default_perms = $x['perms_accept'];
}
if(! $default_perms)
$default_perms = intval(get_pconfig($importer['channel_id'],'system','autoperms'));
$their_perms = PERMS_R_STREAM|PERMS_R_PROFILE|PERMS_R_PHOTOS|PERMS_R_ABOOK|PERMS_W_STREAM|PERMS_W_COMMENT|PERMS_W_MAIL|PERMS_W_CHAT|PERMS_R_STORAGE|PERMS_R_PAGES;
$closeness = get_pconfig($importer['channel_id'],'system','new_abook_closeness');
if($closeness === false)
$closeness = 80;
$r = q("insert into abook ( abook_account, abook_channel, abook_xchan, abook_my_perms, abook_their_perms, abook_closeness, abook_created, abook_updated, abook_connected, abook_dob, abook_pending, abook_instance ) values ( %d, %d, '%s', %d, %d, %d, '%s', '%s', '%s', '%s', %d, '%s' )",
intval($importer['channel_account_id']),
intval($importer['channel_id']),
dbesc($ret['xchan_hash']),
intval($default_perms),
intval($their_perms),
intval($closeness),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
dbesc(NULL_DATE),
intval(($default_perms) ? 0 : 1),
dbesc(z_root())
);
if($r) {
logger("New Diaspora introduction received for {$importer['channel_name']}");
$new_connection = q("select * from abook left join xchan on abook_xchan = xchan_hash left join hubloc on hubloc_hash = xchan_hash where abook_channel = %d and abook_xchan = '%s' order by abook_created desc limit 1",
intval($importer['channel_id']),
dbesc($ret['xchan_hash'])
);
if($new_connection) {
require_once('include/enotify.php');
notification(array(
'type' => NOTIFY_INTRO,
'from_xchan' => $ret['xchan_hash'],
'to_xchan' => $importer['channel_hash'],
'link' => z_root() . '/connedit/' . $new_connection[0]['abook_id'],
));
if($default_perms) {
// Send back a sharing notification to them
$x = diaspora_share($importer,$new_connection[0]);
if($x)
proc_run('php','include/deliver.php',$x);
}
$clone = array();
foreach($new_connection[0] as $k => $v) {
if(strpos($k,'abook_') === 0) {
$clone[$k] = $v;
}
}
unset($clone['abook_id']);
unset($clone['abook_account']);
unset($clone['abook_channel']);
$abconfig = load_abconfig($importer['channel_hash'],$clone['abook_xchan']);
if($abconfig)
$clone['abconfig'] = $abconfig;
build_sync_packet($importer['channel_id'], array('abook' => array($clone)));
}
}
// find the abook record we just created
$contact_record = diaspora_get_contact_by_handle($importer['channel_id'],$sender_handle);
if(! $contact_record) {
logger('diaspora_request: unable to locate newly created contact record.');
return;
}
/** If there is a default group for this channel, add this member to it */
if($importer['channel_default_group']) {
require_once('include/group.php');
$g = group_rec_byhash($importer['channel_id'],$importer['channel_default_group']);
if($g)
group_add_member($importer['channel_id'],'',$contact_record['xchan_hash'],$g['id']);
}
return;
}
function diaspora_post($importer,$xml,$msg) {
$guid = notags(unxmlify($xml['guid']));
$diaspora_handle = notags(diaspora_get_author($xml));
$app = notags(xmlify($xml['provider_display_name']));
if($diaspora_handle != $msg['author']) {
logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
return 202;
}
$xchan = find_diaspora_person_by_handle($diaspora_handle);
if((! $xchan) || (! strstr($xchan['xchan_network'],'diaspora'))) {
logger('Cannot resolve diaspora handle ' . $diaspora_handle);
return;
}
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle);
if(! $app) {
if(strstr($xchan['xchan_network'],'friendica'))
$app = 'Friendica';
else
$app = 'Diaspora';
}
$search_guid = ((strlen($guid) == 64) ? $guid . '%' : $guid);
$r = q("SELECT id FROM item WHERE uid = %d AND mid like '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($search_guid)
);
if($r) {
// check dates if post editing is implemented
logger('diaspora_post: message exists: ' . $guid);
return;
}
$created = unxmlify($xml['created_at']);
$private = ((unxmlify($xml['public']) == 'false') ? 1 : 0);
$body = diaspora2bb($xml['raw_message']);
if($xml['photo']) {
$body = '[img]' . $xml['photo']['remote_photo_path'] . $xml['photo']['remote_photo_name'] . '[/img]' . "\n\n" . $body;
$body = scale_external_images($body);
}
$maxlen = get_max_import_size();
if($maxlen && mb_strlen($body) > $maxlen) {
$body = mb_substr($body,0,$maxlen,'UTF-8');
logger('message length exceeds max_import_size: truncated');
}
$datarray = array();
// Look for tags and linkify them
$results = linkify_tags(get_app(), $body, $importer['channel_id'], true);
$datarray['term'] = array();
if($results) {
foreach($results as $result) {
$success = $result['success'];
if($success['replaced']) {
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => $success['termtype'],
'otype' => TERM_OBJ_POST,
'term' => $success['term'],
'url' => $success['url']
);
}
}
}
$found_tags = false;
$followed_tags = get_pconfig($importer['channel_id'],'diaspora','followed_tags');
if($followed_tags && $datarray['term']) {
foreach($datarray['term'] as $t) {
if(in_array($t['term'],$followed_tags)) {
$found_tags = true;
break;
}
}
}
if((! $found_tags) && (! $contact)) {
logger('Author is not a connection and no followed tags.');
return;
}
$cnt = preg_match_all('/@\[url=(.*?)\](.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => TERM_MENTION,
'otype' => TERM_OBJ_POST,
'term' => $mtch[2],
'url' => $mtch[1]
);
}
}
$cnt = preg_match_all('/@\[zrl=(.*?)\](.*?)\[\/zrl\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
// don't include plustags in the term
$term = ((substr($mtch[2],-1,1) === '+') ? substr($mtch[2],0,-1) : $mtch[2]);
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => TERM_MENTION,
'otype' => TERM_OBJ_POST,
'term' => $term,
'url' => $mtch[1]
);
}
}
$plink = service_plink($xchan,$guid);
$datarray['aid'] = $importer['channel_account_id'];
$datarray['uid'] = $importer['channel_id'];
$datarray['verb'] = ACTIVITY_POST;
$datarray['mid'] = $datarray['parent_mid'] = $guid;
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
$datarray['item_private'] = $private;
$datarray['plink'] = $plink;
$datarray['author_xchan'] = $xchan['xchan_hash'];
$datarray['owner_xchan'] = $xchan['xchan_hash'];
$datarray['body'] = $body;
$datarray['app'] = $app;
$datarray['item_unseen'] = 1;
$datarray['item_thread_top'] = 1;
$tgroup = tgroup_check($importer['channel_id'],$datarray);
if((! $importer['system']) && (! perm_is_allowed($importer['channel_id'],$xchan['xchan_hash'],'send_stream')) && (! $tgroup) && (! $found_tags)) {
logger('diaspora_post: Ignoring this author.');
return 202;
}
if($importer['system']) {
$datarray['comment_policy'] = 'network: diaspora';
}
if(($contact) && (! post_is_importable($datarray,$contact))) {
logger('diaspora_post: filtering this author.');
return 202;
}
$result = item_store($datarray);
if($result['success']) {
sync_an_item($importer['channel_id'],$result['item_id']);
}
return;
}
function get_diaspora_reshare_xml($url,$recurse = 0) {
$x = z_fetch_url($url);
if(! $x['success'])
$x = z_fetch_url(str_replace('https://','http://',$url));
if(! $x['success']) {
logger('get_diaspora_reshare_xml: unable to fetch source url ' . $url);
return;
}
logger('get_diaspora_reshare_xml: source: ' . $x['body'], LOGGER_DEBUG);
// $source_xml = parse_xml_string($x['body'],false);
$source_xml = xml2array($x['body'],false,0,'tag');
if(! $source_xml) {
logger('get_diaspora_reshare_xml: unparseable result from ' . $url);
return '';
}
if($source_xml['post']['status_message']) {
return $source_xml;
}
// see if it's a reshare of a reshare
if($source_xml['post']['reshare'])
$xml = $source_xml['post']['reshare'];
else
return false;
if(($xml['root_diaspora_id'] || $xml['root_author']) && $xml['root_guid'] && $recurse < 15) {
$orig_author = notags(diaspora_get_root_author($xml));
$orig_guid = notags(unxmlify($xml['root_guid']));
$source_url = 'https://' . substr($orig_author,strpos($orig_author,'@')+1) . '/p/' . $orig_guid . '.xml';
$y = get_diaspora_reshare_xml($source_url,$recurse+1);
if($y)
return $y;
}
return false;
}
function diaspora_reshare($importer,$xml,$msg) {
logger('diaspora_reshare: init: ' . print_r($xml,true), LOGGER_DATA);
$a = get_app();
$guid = notags(unxmlify($xml['guid']));
$diaspora_handle = notags(diaspora_get_author($xml));
if($diaspora_handle != $msg['author']) {
logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
return 202;
}
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle);
if(! $contact)
return;
$search_guid = ((strlen($guid) == 64) ? $guid . '%' : $guid);
$r = q("SELECT id FROM item WHERE uid = %d AND mid like '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($search_guid)
);
if($r) {
logger('diaspora_reshare: message exists: ' . $guid);
return;
}
$orig_author = notags(diaspora_get_root_author($xml));
$orig_guid = notags(unxmlify($xml['root_guid']));
$source_url = 'https://' . substr($orig_author,strpos($orig_author,'@')+1) . '/p/' . $orig_guid . '.xml';
$orig_url = 'https://'.substr($orig_author,strpos($orig_author,'@')+1).'/posts/'.$orig_guid;
$source_xml = get_diaspora_reshare_xml($source_url);
if($source_xml['post']['status_message']) {
$body = diaspora2bb($source_xml['post']['status_message']['raw_message']);
$orig_author = diaspora_get_author($source_xml['post']['status_message']);
$orig_guid = notags(unxmlify($source_xml['post']['status_message']['guid']));
// Checking for embedded pictures
if($source_xml['post']['status_message']['photo']['remote_photo_path'] &&
$source_xml['post']['status_message']['photo']['remote_photo_name']) {
$remote_photo_path = notags(unxmlify($source_xml['post']['status_message']['photo']['remote_photo_path']));
$remote_photo_name = notags(unxmlify($source_xml['post']['status_message']['photo']['remote_photo_name']));
$body = '[img]'.$remote_photo_path.$remote_photo_name.'[/img]'."\n".$body;
logger('diaspora_reshare: embedded picture link found: '.$body, LOGGER_DEBUG);
}
$body = scale_external_images($body);
// Add OEmbed and other information to the body
// $body = add_page_info_to_body($body, false, true);
}
else {
// Maybe it is a reshare of a photo that will be delivered at a later time (testing)
logger('diaspora_reshare: no reshare content found: ' . print_r($source_xml,true));
$body = "";
//return;
}
$maxlen = get_max_import_size();
if($maxlen && mb_strlen($body) > $maxlen) {
$body = mb_substr($body,0,$maxlen,'UTF-8');
logger('message length exceeds max_import_size: truncated');
}
$person = find_diaspora_person_by_handle($orig_author);
if($person) {
$orig_author_name = $person['xchan_name'];
$orig_author_link = $person['xchan_url'];
$orig_author_photo = $person['xchan_photo_m'];
}
$created = unxmlify($xml['created_at']);
$private = ((unxmlify($xml['public']) == 'false') ? 1 : 0);
$datarray = array();
// Look for tags and linkify them
$results = linkify_tags(get_app(), $body, $importer['channel_id'], true);
$datarray['term'] = array();
if($results) {
foreach($results as $result) {
$success = $result['success'];
if($success['replaced']) {
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => $success['termtype'],
'otype' => TERM_OBJ_POST,
'term' => $success['term'],
'url' => $success['url']
);
}
}
}
$cnt = preg_match_all('/@\[url=(.*?)\](.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => TERM_MENTION,
'otype' => TERM_OBJ_POST,
'term' => $mtch[2],
'url' => $mtch[1]
);
}
}
$cnt = preg_match_all('/@\[zrl=(.*?)\](.*?)\[\/zrl\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
// don't include plustags in the term
$term = ((substr($mtch[2],-1,1) === '+') ? substr($mtch[2],0,-1) : $mtch[2]);
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => TERM_MENTION,
'otype' => TERM_OBJ_POST,
'term' => $term,
'url' => $mtch[1]
);
}
}
$newbody = "[share author='" . urlencode($orig_author_name)
. "' profile='" . $orig_author_link
. "' avatar='" . $orig_author_photo
. "' link='" . $orig_url
. "' posted='" . datetime_convert('UTC','UTC',unxmlify($source_xml['post']['status_message']['created_at']))
. "' message_id='" . unxmlify($source_xml['post']['status_message']['guid'])
. "']" . $body . "[/share]";
$plink = service_plink($contact,$guid);
$datarray['aid'] = $importer['channel_account_id'];
$datarray['uid'] = $importer['channel_id'];
$datarray['mid'] = $datarray['parent_mid'] = $guid;
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
$datarray['item_private'] = $private;
$datarray['plink'] = $plink;
$datarray['owner_xchan'] = $contact['xchan_hash'];
$datarray['author_xchan'] = $contact['xchan_hash'];
$datarray['body'] = $newbody;
$datarray['app'] = 'Diaspora';
$tgroup = tgroup_check($importer['channel_id'],$datarray);
if((! $importer['system']) && (! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream')) && (! $tgroup)) {
logger('diaspora_reshare: Ignoring this author.');
return 202;
}
if(! post_is_importable($datarray,$contact)) {
logger('diaspora_reshare: filtering this author.');
return 202;
}
$result = item_store($datarray);
if($result['success']) {
sync_an_item($importer['channel_id'],$result['item_id']);
}
return;
}
function diaspora_asphoto($importer,$xml,$msg) {
// This call is believed to be obsolete since 2011-2012 and has not been ported
// from the original Friendica implementation. The code remains in case it is
// ever reimplemented in Diaspora, though it is unlikely that will occur in the
// same context.
logger('diaspora_asphoto called');
$a = get_app();
$guid = notags(unxmlify($xml['guid']));
$diaspora_handle = notags(diaspora_get_author($xml));
if($diaspora_handle != $msg['author']) {
logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
return 202;
}
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle);
if(! $contact)
return;
if((! $importer['system']) && (! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream'))) {
logger('diaspora_asphoto: Ignoring this author.');
return 202;
}
$message_id = $diaspora_handle . ':' . $guid;
$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($message_id),
dbesc($guid)
);
if(count($r)) {
logger('diaspora_asphoto: message exists: ' . $guid);
return;
}
// allocate a guid on our system - we aren't fixing any collisions.
// we're ignoring them
$g = q("select * from guid where guid = '%s' limit 1",
dbesc($guid)
);
if(! count($g)) {
q("insert into guid ( guid ) values ( '%s' )",
dbesc($guid)
);
}
$created = unxmlify($xml['created_at']);
$private = ((unxmlify($xml['public']) == 'false') ? 1 : 0);
if(strlen($xml['objectId']) && ($xml['objectId'] != 0) && ($xml['image_url'])) {
$body = '[url=' . notags(unxmlify($xml['image_url'])) . '][img]' . notags(unxmlify($xml['objectId'])) . '[/img][/url]' . "\n";
$body = scale_external_images($body,false);
}
elseif($xml['image_url']) {
$body = '[img]' . notags(unxmlify($xml['image_url'])) . '[/img]' . "\n";
$body = scale_external_images($body);
}
else {
logger('diaspora_asphoto: no photo url found.');
return;
}
$plink = service_plink($contact,$guid);
$datarray = array();
$datarray['uid'] = $importer['channel_id'];
$datarray['contact-id'] = $contact['id'];
$datarray['wall'] = 0;
$datarray['network'] = NETWORK_DIASPORA;
$datarray['guid'] = $guid;
$datarray['uri'] = $datarray['parent-uri'] = $message_id;
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
$datarray['private'] = $private;
$datarray['parent'] = 0;
$datarray['plink'] = $plink;
$datarray['owner-name'] = $contact['name'];
$datarray['owner-link'] = $contact['url'];
//$datarray['owner-avatar'] = $contact['thumb'];
$datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
$datarray['author-name'] = $contact['name'];
$datarray['author-link'] = $contact['url'];
$datarray['author-avatar'] = $contact['thumb'];
$datarray['body'] = $body;
$datarray['app'] = 'Diaspora/Cubbi.es';
$result = item_store($datarray);
if($result['success']) {
sync_an_item($importer['channel_id'],$result['item_id']);
}
return;
}
function diaspora_comment($importer,$xml,$msg) {
$a = get_app();
$guid = notags(unxmlify($xml['guid']));
$parent_guid = notags(unxmlify($xml['parent_guid']));
$diaspora_handle = notags(diaspora_get_author($xml));
$text = unxmlify($xml['text']);
$author_signature = notags(unxmlify($xml['author_signature']));
$parent_author_signature = (($xml['parent_author_signature']) ? notags(unxmlify($xml['parent_author_signature'])) : '');
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']);
if(! $contact) {
logger('diaspora_comment: cannot find contact: ' . $msg['author']);
return;
}
$pubcomment = get_pconfig($importer['channel_id'],'system','diaspora_public_comments');
// by default comments on public posts are allowed from anybody on Diaspora. That is their policy.
// Once this setting is set to something we'll track your preference and it will over-ride the default.
if($pubcomment === false)
$pubcomment = 1;
// Friendica is currently truncating guids at 64 chars
$search_guid = $parent_guid;
if(strlen($parent_guid) == 64)
$search_guid = $parent_guid . '%';
$r = q("SELECT * FROM item WHERE uid = %d AND mid LIKE '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($search_guid)
);
if(! $r) {
logger('diaspora_comment: parent item not found: parent: ' . $parent_guid . ' item: ' . $guid);
return;
}
$parent_item = $r[0];
if(intval($parent_item['item_private']))
$pubcomment = 0;
$search_guid = $guid;
if(strlen($guid) == 64)
$search_guid = $guid . '%';
$r = q("SELECT * FROM item WHERE uid = %d AND mid like '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($search_guid)
);
if($r) {
logger('diaspora_comment: our comment just got relayed back to us (or there was a guid collision) : ' . $guid);
return;
}
/* How Diaspora performs comment signature checking:
- If an item has been sent by the comment author to the top-level post owner to relay on
to the rest of the contacts on the top-level post, the top-level post owner should check
the author_signature, then create a parent_author_signature before relaying the comment on
- If an item has been relayed on by the top-level post owner, the contacts who receive it
check only the parent_author_signature. Basically, they trust that the top-level post
owner has already verified the authenticity of anything he/she sends out
- In either case, the signature that get checked is the signature created by the person
who sent the pseudo-salmon
*/
$signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
$key = $msg['key'];
$unxml = array_map('unxmlify',$xml);
if($parent_author_signature) {
// If a parent_author_signature exists, then we've received the comment
// relayed from the top-level post owner.
$x = diaspora_verify_fields($unxml,$parent_author_signature,$key);
if(! $x) {
logger('diaspora_comment: top-level owner verification failed.');
return;
}
//$parent_author_signature = base64_decode($parent_author_signature);
//if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
// logger('diaspora_comment: top-level owner verification failed.');
// return;
//}
}
else {
// the comment is being sent to the owner to relay
if($importer['system']) {
// don't relay to the sys channel
logger('diaspora_comment: relay to sys channel blocked.');
return;
}
// Note: Diaspora verifies both signatures. We only verify the
// author_signature when relaying.
//
// If there's no parent_author_signature, then we've received the comment
// from the comment creator. In that case, the person is commenting on
// our post, so he/she must be a contact of ours and his/her public key
// should be in $msg['key']
$x = diaspora_verify_fields($unxml,$author_signature,$key);
if(! $x) {
logger('diaspora_comment: comment author verification failed.');
return;
}
//$author_signature = base64_decode($author_signature);
//if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
// logger('diaspora_comment: comment author verification failed.');
// return;
//}
// No parent_author_signature, so let's assume we're relaying the post. Create one.
$unxml['parent_author_signature'] = diaspora_sign_fields($unxml,$importer['channel_prvkey']);
}
// Phew! Everything checks out. Now create an item.
// Find the original comment author information.
// We need this to make sure we display the comment author
// information (name and avatar) correctly.
if(strcasecmp($diaspora_handle,$msg['author']) == 0)
$person = $contact;
else {
$person = find_diaspora_person_by_handle($diaspora_handle);
if(! is_array($person)) {
logger('diaspora_comment: unable to find author details');
return;
}
}
$body = diaspora2bb($text);
$maxlen = get_max_import_size();
if($maxlen && mb_strlen($body) > $maxlen) {
$body = mb_substr($body,0,$maxlen,'UTF-8');
logger('message length exceeds max_import_size: truncated');
}
$datarray = array();
// Look for tags and linkify them
$results = linkify_tags(get_app(), $body, $importer['channel_id'], true);
$datarray['term'] = array();
if($results) {
foreach($results as $result) {
$success = $result['success'];
if($success['replaced']) {
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => $success['termtype'],
'otype' => TERM_OBJ_POST,
'term' => $success['term'],
'url' => $success['url']
);
}
}
}
$cnt = preg_match_all('/@\[url=(.*?)\](.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => TERM_MENTION,
'otype' => TERM_OBJ_POST,
'term' => $mtch[2],
'url' => $mtch[1]
);
}
}
$cnt = preg_match_all('/@\[zrl=(.*?)\](.*?)\[\/zrl\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
// don't include plustags in the term
$term = ((substr($mtch[2],-1,1) === '+') ? substr($mtch[2],0,-1) : $mtch[2]);
$datarray['term'][] = array(
'uid' => $importer['channel_id'],
'type' => TERM_MENTION,
'otype' => TERM_OBJ_POST,
'term' => $term,
'url' => $mtch[1]
);
}
}
$datarray['aid'] = $importer['channel_account_id'];
$datarray['uid'] = $importer['channel_id'];
$datarray['verb'] = ACTIVITY_POST;
$datarray['mid'] = $guid;
$datarray['parent_mid'] = $parent_item['mid'];
// set the route to that of the parent so downstream hubs won't reject it.
$datarray['route'] = $parent_item['route'];
// No timestamps for comments? OK, we'll the use current time.
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert();
$datarray['item_private'] = $parent_item['item_private'];
$datarray['owner_xchan'] = $parent_item['owner_xchan'];
$datarray['author_xchan'] = $person['xchan_hash'];
$datarray['body'] = $body;
if(strstr($person['xchan_network'],'friendica'))
$app = 'Friendica';
else
$app = 'Diaspora';
$datarray['app'] = $app;
if(! $parent_author_signature) {
$key = get_config('system','pubkey');
$x = array('signer' => $diaspora_handle, 'body' => $text,
'signed_text' => $signed_data, 'signature' => base64_encode($author_signature));
$datarray['diaspora_meta'] = json_encode($x);
}
// So basically if something arrives at the sys channel it's by definition public and we allow it.
// If $pubcomment and the parent was public, we allow it.
// In all other cases, honour the permissions for this Diaspora connection
$tgroup = tgroup_check($importer['channel_id'],$datarray);
if((! $importer['system']) && (! $pubcomment) && (! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_comments')) && (! $tgroup)) {
logger('diaspora_comment: Ignoring this author.');
return 202;
}
set_iconfig($datarray,'diaspora','fields',$unxml,true);
$result = item_store($datarray);
if($result && $result['success'])
$message_id = $result['item_id'];
$upstream_leg = false;
if(intval($parent_item['item_origin']) && (! $parent_author_signature)) {
// if the message isn't already being relayed, notify others
// the existence of parent_author_signature means the parent_author or owner
// is already relaying.
$upstream_leg = true;
proc_run('php','include/notifier.php','comment-import',$message_id);
}
if($result['success']) {
$r = q("select * from item where id = %d limit 1",
intval($result['item_id'])
);
if($r) {
send_status_notifications($result['item_id'],$r[0]);
sync_an_item($importer['channel_id'],$result['item_id']);
}
}
return;
}
function diaspora_conversation($importer,$xml,$msg) {
$a = get_app();
$guid = notags(unxmlify($xml['guid']));
$subject = notags(unxmlify($xml['subject']));
$diaspora_handle = notags(diaspora_get_author($xml));
$participant_handles = notags(diaspora_get_participants($xml));
$created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml['created_at'])));
$parent_uri = $guid;
$messages = $xml['message'];
if(! count($messages)) {
logger('diaspora_conversation: empty conversation');
return;
}
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']);
if(! $contact) {
logger('diaspora_conversation: cannot find contact: ' . $msg['author']);
return;
}
if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_mail')) {
logger('diaspora_conversation: Ignoring this author.');
return 202;
}
$conversation = null;
$c = q("select * from conv where uid = %d and guid = '%s' limit 1",
intval($importer['channel_id']),
dbesc($guid)
);
if(count($c))
$conversation = $c[0];
else {
if($subject)
$nsubject = str_rot47(base64url_encode($subject));
$r = q("insert into conv (uid,guid,creator,created,updated,subject,recips) values(%d, '%s', '%s', '%s', '%s', '%s', '%s') ",
intval($importer['channel_id']),
dbesc($guid),
dbesc($diaspora_handle),
dbesc(datetime_convert('UTC','UTC',$created_at)),
dbesc(datetime_convert()),
dbesc($nsubject),
dbesc($participant_handles)
);
if($r)
$c = q("select * from conv where uid = %d and guid = '%s' limit 1",
intval($importer['channel_id']),
dbesc($guid)
);
if(count($c))
$conversation = $c[0];
}
if(! $conversation) {
logger('diaspora_conversation: unable to create conversation.');
return;
}
$conversation['subject'] = base64url_decode(str_rot47($conversation['subject']));
foreach($messages as $mesg) {
$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'])));
$msg_diaspora_handle = notags(diaspora_get_author($mesg));
$msg_conversation_guid = notags(unxmlify($mesg['conversation_guid']));
if($msg_conversation_guid != $guid) {
logger('diaspora_conversation: message conversation guid does not belong to the current conversation. ' . $xml);
continue;
}
$body = diaspora2bb($msg_text);
$maxlen = get_max_import_size();
if($maxlen && mb_strlen($body) > $maxlen) {
$body = mb_substr($body,0,$maxlen,'UTF-8');
logger('message length exceeds max_import_size: truncated');
}
$author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg['created_at']) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
$author_signature = base64_decode($msg_author_signature);
if(strcasecmp($msg_diaspora_handle,$msg['author']) == 0) {
$person = $contact;
$key = $msg['key'];
}
else {
$person = find_diaspora_person_by_handle($msg_diaspora_handle);
if(is_array($person) && x($person,'xchan_pubkey'))
$key = $person['xchan_pubkey'];
else {
logger('diaspora_conversation: unable to find author details');
continue;
}
}
if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
logger('diaspora_conversation: verification failed.');
continue;
}
if($msg_parent_author_signature) {
$owner_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg['created_at']) . ';' . $msg_diaspora_handle . ';' . $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('diaspora_conversation: owner verification failed.');
continue;
}
}
$stored_parent_mid = (($msg_parent_guid == $msg_conversation_guid) ? $msg_guid : $msg_parent_guid);
$r = q("select id from mail where mid = '%s' limit 1",
dbesc($message_id)
);
if(count($r)) {
logger('diaspora_conversation: duplicate message already delivered.', LOGGER_DEBUG);
continue;
}
if($subject)
$subject = str_rot47(base64url_encode($subject));
if($body)
$body = str_rot47(base64url_encode($body));
q("insert into mail ( `account_id`, `channel_id`, `convid`, `conv_guid`, `from_xchan`,`to_xchan`,`title`,`body`,`mail_obscured`,`mid`,`parent_mid`,`created`) values ( %d, %d, %d, '%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s')",
intval($importer['channel_account_id']),
intval($importer['channel_id']),
intval($conversation['id']),
dbesc($conversation['guid']),
dbesc($person['xchan_hash']),
dbesc($importer['channel_hash']),
dbesc($subject),
dbesc($body),
intval(1),
dbesc($msg_guid),
dbesc($stored_parent_mid),
dbesc($msg_created_at)
);
q("update conv set updated = '%s' where id = %d",
dbesc(datetime_convert()),
intval($conversation['id'])
);
$z = q("select * from mail where mid = '%s' and channel_id = %d limit 1",
dbesc($msg_guid),
intval($importer['channel_id'])
);
require_once('include/enotify.php');
notification(array(
'from_xchan' => $person['xchan_hash'],
'to_xchan' => $importer['channel_hash'],
'type' => NOTIFY_MAIL,
'item' => $z[0],
'verb' => ACTIVITY_POST,
'otype' => 'mail'
));
}
return;
}
function diaspora_message($importer,$xml,$msg) {
$a = get_app();
$msg_guid = notags(unxmlify($xml['guid']));
$msg_parent_guid = notags(unxmlify($xml['parent_guid']));
$msg_parent_author_signature = notags(unxmlify($xml['parent_author_signature']));
$msg_author_signature = notags(unxmlify($xml['author_signature']));
$msg_text = unxmlify($xml['text']);
$msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml['created_at'])));
$msg_diaspora_handle = notags(diaspora_get_author($xml));
$msg_conversation_guid = notags(unxmlify($xml['conversation_guid']));
$parent_uri = $msg_parent_guid;
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg_diaspora_handle);
if(! $contact) {
logger('diaspora_message: cannot find contact: ' . $msg_diaspora_handle);
return;
}
if(! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_mail')) {
logger('Ignoring this author.');
return 202;
}
$conversation = null;
$c = q("select * from conv where uid = %d and guid = '%s' limit 1",
intval($importer['channel_id']),
dbesc($msg_conversation_guid)
);
if($c)
$conversation = $c[0];
else {
logger('diaspora_message: conversation not available.');
return;
}
$reply = 0;
$subject = $conversation['subject']; //this is already encoded
$body = diaspora2bb($msg_text);
$maxlen = get_max_import_size();
if($maxlen && mb_strlen($body) > $maxlen) {
$body = mb_substr($body,0,$maxlen,'UTF-8');
logger('message length exceeds max_import_size: truncated');
}
$parent_ptr = $msg_parent_guid;
if($parent_ptr === $conversation['guid']) {
// this should always be the case
$x = q("select mid from mail where conv_guid = '%s' and channel_id = %d order by id asc limit 1",
dbesc($conversation['guid']),
intval($importer['channel_id'])
);
if($x)
$parent_ptr = $x[0]['mid'];
}
$author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($xml['created_at']) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
$author_signature = base64_decode($msg_author_signature);
$person = find_diaspora_person_by_handle($msg_diaspora_handle);
if(is_array($person) && x($person,'xchan_pubkey'))
$key = $person['xchan_pubkey'];
else {
logger('diaspora_message: unable to find author details');
return;
}
if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
logger('diaspora_message: verification failed.');
return;
}
$r = q("select id from mail where mid = '%s' and channel_id = %d limit 1",
dbesc($msg_guid),
intval($importer['channel_id'])
);
if($r) {
logger('diaspora_message: duplicate message already delivered.', LOGGER_DEBUG);
return;
}
$key = get_config('system','pubkey');
// $subject is a copy of the already obscured subject from the conversation structure
if($body)
$body = str_rot47(base64url_encode($body));
q("insert into mail ( `account_id`, `channel_id`, `convid`, `conv_guid`, `from_xchan`,`to_xchan`,`title`,`body`,`mail_obscured`,`mid`,`parent_mid`,`created`, mail_isreply) values ( %d, %d, %d, '%s', '%s', '%s', '%s', '%s', %d, '%s', '%s', '%s', %d)",
intval($importer['channel_account_id']),
intval($importer['channel_id']),
intval($conversation['id']),
dbesc($conversation['guid']),
dbesc($person['xchan_hash']),
dbesc($importer['xchan_hash']),
dbesc($subject),
dbesc($body),
intval(1),
dbesc($msg_guid),
dbesc($parent_ptr),
dbesc($msg_created_at),
intval(1)
);
q("update conv set updated = '%s' where id = %d",
dbesc(datetime_convert()),
intval($conversation['id'])
);
$z = q("select * from mail where mid = '%s' and channel_id = %d limit 1",
dbesc($msg_guid),
intval($importer['channel_id'])
);
require_once('include/enotify.php');
notification(array(
'from_xchan' => $person['xchan_hash'],
'to_xchan' => $importer['channel_hash'],
'type' => NOTIFY_MAIL,
'item' => $z[0],
'verb' => ACTIVITY_POST,
'otype' => 'mail'
));
return;
}
function diaspora_photo($importer,$xml,$msg) {
$a = get_app();
logger('diaspora_photo: init',LOGGER_DEBUG);
$remote_photo_path = notags(unxmlify($xml['remote_photo_path']));
$remote_photo_name = notags(unxmlify($xml['remote_photo_name']));
$status_message_guid = notags(unxmlify($xml['status_message_guid']));
$guid = notags(unxmlify($xml['guid']));
$diaspora_handle = notags(diaspora_get_author($xml));
$public = notags(unxmlify($xml['public']));
$created_at = notags(unxmlify($xml['created_at']));
logger('diaspora_photo: status_message_guid: ' . $status_message_guid, LOGGER_DEBUG);
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']);
if(! $contact) {
logger('diaspora_photo: contact record not found: ' . $msg['author'] . ' handle: ' . $diaspora_handle);
return;
}
if((! $importer['system']) && (! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'send_stream'))) {
logger('diaspora_photo: Ignoring this author.');
return 202;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `mid` = '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($status_message_guid)
);
if(! $r) {
logger('diaspora_photo: attempt = ' . $attempt . '; status message not found: ' . $status_message_guid . ' for photo: ' . $guid);
return;
}
// $parent_item = $r[0];
// $link_text = '[img]' . $remote_photo_path . $remote_photo_name . '[/img]' . "\n";
// $link_text = scale_external_images($link_text, true,
// array($remote_photo_name, 'scaled_full_' . $remote_photo_name));
// if(strpos($parent_item['body'],$link_text) === false) {
// $r = q("update item set `body` = '%s', `visible` = 1 where `id` = %d and `uid` = %d",
// dbesc($link_text . $parent_item['body']),
// intval($parent_item['id']),
// intval($parent_item['uid'])
// );
// }
return;
}
function diaspora_like($importer,$xml,$msg) {
$a = get_app();
$guid = notags(unxmlify($xml['guid']));
$parent_guid = notags(unxmlify($xml['parent_guid']));
$diaspora_handle = notags(diaspora_get_author($xml));
$target_type = notags(diaspora_get_ptype($xml));
$positive = notags(unxmlify($xml['positive']));
$author_signature = notags(unxmlify($xml['author_signature']));
$parent_author_signature = (($xml['parent_author_signature']) ? notags(unxmlify($xml['parent_author_signature'])) : '');
// likes on comments not supported here and likes on photos not supported by Diaspora
// if($target_type !== 'Post')
// return;
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$msg['author']);
if(! $contact) {
logger('diaspora_like: cannot find contact: ' . $msg['author'] . ' for channel ' . $importer['channel_name']);
return;
}
if((! $importer['system']) && (! perm_is_allowed($importer['channel_id'],$contact['xchan_hash'],'post_comments'))) {
logger('diaspora_like: Ignoring this author.');
return 202;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `mid` = '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($parent_guid)
);
if(! count($r)) {
logger('diaspora_like: parent item not found: ' . $guid);
return;
}
$parent_item = $r[0];
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `mid` = '%s' LIMIT 1",
intval($importer['channel_id']),
dbesc($guid)
);
if(count($r)) {
if($positive === 'true') {
logger('diaspora_like: duplicate like: ' . $guid);
return;
}
// Note: I don't think "Like" objects with positive = "false" are ever actually used
// It looks like "RelayableRetractions" are used for "unlike" instead
if($positive === 'false') {
logger('diaspora_like: received a like with positive set to "false"...ignoring');
// perhaps call drop_item()
// FIXME--actually don't unless it turns out that Diaspora does indeed send out "false" likes
// send notification via proc_run()
return;
}
}
$i = q("select * from xchan where xchan_hash = '%s' limit 1",
dbesc($parent_item['author_xchan'])
);
if($i)
$item_author = $i[0];
// Note: I don't think "Like" objects with positive = "false" are ever actually used
// It looks like "RelayableRetractions" are used for "unlike" instead
if($positive === 'false') {
logger('diaspora_like: received a like with positive set to "false"');
logger('diaspora_like: unlike received with no corresponding like...ignoring');
return;
}
/* How Diaspora performs "like" signature checking:
- If an item has been sent by the like author to the top-level post owner to relay on
to the rest of the contacts on the top-level post, the top-level post owner should check
the author_signature, then create a parent_author_signature before relaying the like on
- If an item has been relayed on by the top-level post owner, the contacts who receive it
check only the parent_author_signature. Basically, they trust that the top-level post
owner has already verified the authenticity of anything he/she sends out
- In either case, the signature that get checked is the signature created by the person
who sent the salmon
*/
// 2014-09-10 let's try this: signatures are failing. I'll try and make a signable string from
// the parameters in the order they were presented in the post. This is how D* creates the signable string.
$signed_data = $positive . ';' . $guid . ';' . $target_type . ';' . $parent_guid . ';' . $diaspora_handle;
$key = $msg['key'];
if($parent_author_signature) {
// If a parent_author_signature exists, then we've received the like
// relayed from the top-level post owner. There's no need to check the
// author_signature if the parent_author_signature is valid
$x = diaspora_verify_fields($xml,$parent_author_signature,$key);
if(! $x) {
logger('diaspora_like: top-level owner verification failed.');
return;
}
//$parent_author_signature = base64_decode($parent_author_signature);
//if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
// if (intval(get_config('system','ignore_diaspora_like_signature')))
// logger('diaspora_like: top-level owner verification failed. Proceeding anyway.');
// else {
// logger('diaspora_like: top-level owner verification failed.');
// return;
// }
//}
}
else {
// If there's no parent_author_signature, then we've received the like
// from the like creator. In that case, the person is "like"ing
// our post, so he/she must be a contact of ours and his/her public key
// should be in $msg['key']
$x = diaspora_verify_fields($xml,$author_signature,$key);
if(! $x) {
logger('diaspora_like: author verification failed.');
return;
}
//$author_signature = base64_decode($author_signature);
//if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
// if (intval(get_config('system','ignore_diaspora_like_signature')))
// logger('diaspora_like: like creator verification failed. Proceeding anyway');
// else {
// logger('diaspora_like: like creator verification failed.');
// return;
// }
//}
$xml['parent_author_signature'] = diaspora_sign_fields($xml,$importer['channel_prvkey']);
}
logger('diaspora_like: signature check complete.',LOGGER_DEBUG);
// Phew! Everything checks out. Now create an item.
// Find the original comment author information.
// We need this to make sure we display the comment author
// information (name and avatar) correctly.
if(strcasecmp($diaspora_handle,$msg['author']) == 0)
$person = $contact;
else {
$person = find_diaspora_person_by_handle($diaspora_handle);
if(! is_array($person)) {
logger('diaspora_like: unable to find author details');
return;
}
}
$uri = $diaspora_handle . ':' . $guid;
$activity = ACTIVITY_LIKE;
$post_type = (($parent_item['resource_type'] === 'photo') ? t('photo') : t('status'));
$links = array(array('rel' => 'alternate','type' => 'text/html', 'href' => $parent_item['plink']));
$objtype = (($parent_item['resource_type'] === 'photo') ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
$body = $parent_item['body'];
$object = json_encode(array(
'type' => $post_type,
'id' => $parent_item['mid'],
'parent' => (($parent_item['thr_parent']) ? $parent_item['thr_parent'] : $parent_item['parent_mid']),
'link' => $links,
'title' => $parent_item['title'],
'content' => $parent_item['body'],
'created' => $parent_item['created'],
'edited' => $parent_item['edited'],
'author' => array(
'name' => $item_author['xchan_name'],
'address' => $item_author['xchan_addr'],
'guid' => $item_author['xchan_guid'],
'guid_sig' => $item_author['xchan_guid_sig'],
'link' => array(
array('rel' => 'alternate', 'type' => 'text/html', 'href' => $item_author['xchan_url']),
array('rel' => 'photo', 'type' => $item_author['xchan_photo_mimetype'], 'href' => $item_author['xchan_photo_m'])),
),
));
$bodyverb = t('%1$s likes %2$s\'s %3$s');
$arr = array();
$arr['uid'] = $importer['channel_id'];
$arr['aid'] = $importer['channel_account_id'];
$arr['mid'] = $guid;
$arr['parent_mid'] = $parent_item['mid'];
$arr['owner_xchan'] = $parent_item['owner_xchan'];
$arr['author_xchan'] = $person['xchan_hash'];
$ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
$alink = '[url=' . $parent_item['author-link'] . ']' . $parent_item['author-name'] . '[/url]';
$plink = '[url='. z_root() .'/display/'.$guid.']'.$post_type.'[/url]';
$arr['body'] = sprintf( $bodyverb, $ulink, $alink, $plink );
$arr['app'] = 'Diaspora';
// set the route to that of the parent so downstream hubs won't reject it.
$arr['route'] = $parent_item['route'];
$arr['item_private'] = $parent_item['item_private'];
$arr['verb'] = $activity;
$arr['obj_type'] = $objtype;
$arr['object'] = $object;
if(! $parent_author_signature) {
$key = get_config('system','pubkey');
$x = array('signer' => $diaspora_handle, 'body' => $text,
'signed_text' => $signed_data, 'signature' => base64_encode($author_signature));
$arr['diaspora_meta'] = json_encode($x);
}
set_iconfig($arr,'diaspora','fields',array_map('unxmlify',$xml),true);
$result = item_store($arr);
if($result['success']) {
// if the message isn't already being relayed, notify others
// the existence of parent_author_signature means the parent_author or owner
// is already relaying. The parent_item['origin'] indicates the message was created on our system
if(intval($parent_item['item_origin']) && (! $parent_author_signature))
proc_run('php','include/notifier.php','comment-import',$result['item_id']);
sync_an_item($importer['channel_id'],$result['item_id']);
}
return;
}
function diaspora_retraction($importer,$xml,$msg = null) {
$guid = notags(diaspora_get_target_guid($xml));
$diaspora_handle = notags(diaspora_get_author($xml));
$type = notags(diaspora_get_type($xml));
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle);
if(! $contact)
return;
if($type === 'Person' || $type === 'Contact') {
require_once('include/Contact.php');
contact_remove($importer['channel_id'],$contact['abook_id']);
}
elseif(($type === 'Post') || ($type === 'StatusMessage') || ($type === 'Comment') || ($type === 'Like')) {
$r = q("select * from item where mid = '%s' and uid = %d limit 1",
dbesc('guid'),
intval($importer['channel_id'])
);
if($r) {
if(link_compare($r[0]['author_xchan'],$contact['xchan_hash'])
|| link_compare($r[0]['owner_xchan'],$contact['xchan_hash'])) {
drop_item($r[0]['id'],false);
}
// @FIXME - ensure that relay is performed if this was an upstream
// Could probably check if we're the owner and it is a like or comment
// This may or may not be handled by drop_item
}
}
return 202;
// NOTREACHED
}
function diaspora_signed_retraction($importer,$xml,$msg) {
// obsolete - see https://github.com/SuperTux88/diaspora_federation/issues/27
$guid = notags(diaspora_get_target_guid($xml));
$diaspora_handle = notags(diaspora_get_author($xml));
$type = notags(diaspora_get_type($xml));
$sig = notags(unxmlify($xml['target_author_signature']));
$parent_author_signature = (($xml['parent_author_signature']) ? notags(unxmlify($xml['parent_author_signature'])) : '');
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle);
if(! $contact) {
logger('diaspora_signed_retraction: no contact ' . $diaspora_handle . ' for ' . $importer['channel_id']);
return;
}
$signed_data = $guid . ';' . $type ;
$key = $msg['key'];
/* How Diaspora performs relayable_retraction signature checking:
- If an item has been sent by the item author to the top-level post owner to relay on
to the rest of the contacts on the top-level post, the top-level post owner checks
the author_signature, then creates a parent_author_signature before relaying the item on
- If an item has been relayed on by the top-level post owner, the contacts who receive it
check only the parent_author_signature. Basically, they trust that the top-level post
owner has already verified the authenticity of anything he/she sends out
- In either case, the signature that get checked is the signature created by the person
who sent the salmon
*/
if($parent_author_signature) {
$parent_author_signature = base64_decode($parent_author_signature);
if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
logger('diaspora_signed_retraction: top-level post owner verification failed');
return;
}
}
else {
$sig_decode = base64_decode($sig);
if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
logger('diaspora_signed_retraction: retraction owner verification failed.' . print_r($msg,true));
return;
}
}
if($type === 'StatusMessage' || $type === 'Comment' || $type === 'Like') {
$r = q("select * from item where mid = '%s' and uid = %d limit 1",
dbesc($guid),
intval($importer['channel_id'])
);
if($r) {
if($r[0]['author_xchan'] == $contact['xchan_hash']) {
drop_item($r[0]['id'],false, DROPITEM_PHASE1);
// Now check if the retraction needs to be relayed by us
//
// The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
// return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
// The only item with `parent` and `id` as the parent id is the parent item.
$p = q("select item_flags from item where parent = %d and id = %d limit 1",
$r[0]['parent'],
$r[0]['parent']
);
if($p) {
if(intval($p[0]['item_origin']) && (! $parent_author_signature)) {
// the existence of parent_author_signature would have meant the parent_author or owner
// is already relaying.
logger('diaspora_signed_retraction: relaying relayable_retraction');
proc_run('php','include/notifier.php','drop',$r[0]['id']);
}
}
}
}
}
else
logger('diaspora_signed_retraction: unknown type: ' . $type);
return 202;
// NOTREACHED
}
function diaspora_profile($importer,$xml,$msg) {
$a = get_app();
$diaspora_handle = notags(diaspora_get_author($xml));
if($diaspora_handle != $msg['author']) {
logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
return 202;
}
$contact = diaspora_get_contact_by_handle($importer['channel_id'],$diaspora_handle);
if(! $contact)
return;
if($contact['blocked']) {
logger('diaspora_profile: Ignoring this author.');
return 202;
}
$name = unxmlify($xml['first_name']) . ((strlen($xml['last_name'])) ? ' ' . unxmlify($xml['last_name']) : '');
$image_url = unxmlify($xml['image_url']);
$birthday = unxmlify($xml['birthday']);
$handle_parts = explode("@", $diaspora_handle);
if($name === '') {
$name = $handle_parts[0];
}
if( preg_match("|^https?://|", $image_url) === 0) {
$image_url = "http://" . $handle_parts[1] . $image_url;
}
require_once('include/photo/photo_driver.php');
$images = import_xchan_photo($image_url,$contact['xchan_hash']);
// Generic birthday. We don't know the timezone. The year is irrelevant.
$birthday = str_replace('1000','1901',$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'];
$r = q("update xchan set xchan_name = '%s', xchan_name_date = '%s', xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s' where xchan_hash = '%s' ",
dbesc($name),
dbesc(datetime_convert()),
dbesc($images[0]),
dbesc($images[1]),
dbesc($images[2]),
dbesc($images[3]),
dbesc(datetime_convert()),
intval($contact['xchan_hash'])
);
return;
}
function diaspora_participation($importer,$xml,$msg) {
$diaspora_handle = notags(diaspora_get_author($xml));
$type = notags(diaspora_get_ptype($xml));
// not currently handled
logger('participation: ' . print_r($xml,true), LOGGER_DATA);
}
function diaspora_poll_participation($importer,$xml,$msg) {
$diaspora_handle = notags(diaspora_get_author($xml));
// not currently handled
logger('poll_participation: ' . print_r($xml,true), LOGGER_DATA);
}
function diaspora_account_deletion($importer,$xml,$msg) {
$diaspora_handle = notags(diaspora_get_author($xml));
// not currently handled
logger('account_deletion: ' . print_r($xml,true), LOGGER_DATA);
}
function diaspora_get_author($xml) {
if(array_key_exists('diaspora_handle',$xml))
return unxmlify($xml['diaspora_handle']);
elseif(array_key_exists('sender_handle',$xml))
return unxmlify($xml['sender_handle']);
elseif(array_key_exists('author',$xml))
return unxmlify($xml['author']);
else
return '';
}
function diaspora_get_root_author($xml) {
if(array_key_exists('root_diaspora_id',$xml))
return unxmlify($xml['diaspora_diaspora_id']);
elseif(array_key_exists('root_author',$xml))
return unxmlify($xml['root_author']);
else
return '';
}
function diaspora_get_participants($xml) {
if(array_key_exists('participant_handles',$xml))
return unxmlify($xml['participant_handles']);
elseif(array_key_exists('participants',$xml))
return unxmlify($xml['participants']);
else
return '';
}
function diaspora_get_ptype($xml) {
if(array_key_exists('target_type',$xml))
return unxmlify($xml['target_type']);
elseif(array_key_exists('parent_type',$xml))
return unxmlify($xml['parent_type']);
else
return '';
}
function diaspora_get_type($xml) {
if(array_key_exists('target_type',$xml))
return unxmlify($xml['target_type']);
elseif(array_key_exists('type',$xml))
return unxmlify($xml['type']);
else
return '';
}
function diaspora_get_target_guid($xml) {
if(array_key_exists('post_guid',$xml))
return unxmlify($xml['post_guid']);
elseif(array_key_exists('target_guid',$xml))
return unxmlify($xml['target_guid']);
elseif(array_key_exists('guid',$xml))
return unxmlify($xml['guid']);
else
return '';
}
function diaspora_get_recipient($xml) {
if(array_key_exists('recipient_handle',$xml))
return unxmlify($xml['recipient_handle']);
elseif(array_key_exists('recipient',$xml))
return unxmlify($xml['recipient']);
else
return '';
}
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