mirror of
https://github.com/YunoHost-Apps/hubzilla_ynh.git
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387 lines
No EOL
10 KiB
PHP
387 lines
No EOL
10 KiB
PHP
<?php
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require_once('include/salmon.php');
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require_once('include/crypto.php');
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require_once('include/items.php');
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require_once('include/follow.php');
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require_once('include/Contact.php');
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function salmon_return($val) {
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if($val >= 400)
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$err = 'Error';
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if($val >= 200 && $val < 300)
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$err = 'OK';
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logger('mod-salmon returns ' . $val);
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header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
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killme();
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}
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function salmon_post(&$a) {
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$xml = file_get_contents('php://input');
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logger('mod-salmon: new salmon ' . $xml, LOGGER_DATA);
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$nick = ((argc() > 1) ? trim(argv(1)) : '');
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// $mentions = (($a->argc > 2 && $a->argv[2] === 'mention') ? true : false);
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$importer = channelx_by_nick($nick);
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if(! $importer)
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http_status_exit(500);
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// @fixme check that this channel has the GNU-Social protocol enabled
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// parse the xml
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$dom = simplexml_load_string($xml,'SimpleXMLElement',0,NAMESPACE_SALMON_ME);
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// figure out where in the DOM tree our data is hiding
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if($dom->provenance->data)
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$base = $dom->provenance;
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elseif($dom->env->data)
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$base = $dom->env;
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elseif($dom->data)
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$base = $dom;
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if(! $base) {
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logger('mod-salmon: unable to locate salmon data in xml ');
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http_status_exit(400);
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}
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logger('data: ' . $xml, LOGGER_DATA);
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// Stash the signature away for now. We have to find their key or it won't be good for anything.
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$signature = base64url_decode($base->sig);
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// unpack the data
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// strip whitespace so our data element will return to one big base64 blob
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$data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
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// stash away some other stuff for later
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$type = $base->data[0]->attributes()->type[0];
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$keyhash = $base->sig[0]->attributes()->keyhash[0];
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$encoding = $base->encoding;
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$alg = $base->alg;
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// Salmon magic signatures have evolved and there is no way of knowing ahead of time which
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// flavour we have. We'll try and verify it regardless.
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$stnet_signed_data = $data;
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$signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
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$compliant_format = str_replace('=','',$signed_data);
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// decode the data
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$data = base64url_decode($data);
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logger('decoded: ' . $data, LOGGER_DATA);
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// GNU-Social doesn't send a legal Atom feed over salmon, only an Atom entry. Unfortunately
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// our parser is a bit strict about compliance so we'll insert just enough of a feed
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// tag to trick it into believing it's a compliant feed.
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if(! strstr($data,'<feed')) {
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$data = str_replace('<entry ','<feed xmlns="http://www.w3.org/2005/Atom"><entry ',$data);
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$data .= '</feed>';
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}
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$datarray = process_salmon_feed($data,$importer);
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$author_link = $datarray['author']['author_link'];
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if(! $author_link) {
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logger('mod-salmon: Could not retrieve author URI.');
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http_status_exit(400);
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}
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$r = q("select xchan_pubkey from xchan where xchan_guid = '%s' limit 1",
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dbesc($author_link)
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);
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if($r) {
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$pubkey = $r[0]['xchan_pubkey'];
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}
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else {
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// Once we have the author URI, go to the web and try to find their public key
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logger('mod-salmon: Fetching key for ' . $author_link);
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$key = get_salmon_key($author_link,$keyhash);
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if(! $key) {
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logger('mod-salmon: Could not retrieve author key.');
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http_status_exit(400);
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}
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$key_info = explode('.',$key);
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$m = base64url_decode($key_info[1]);
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$e = base64url_decode($key_info[2]);
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logger('mod-salmon: key details: ' . print_r($key_info,true), LOGGER_DEBUG);
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$pubkey = metopem($m,$e);
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}
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// We should have everything we need now. Let's see if it verifies.
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$verify = rsa_verify($compliant_format,$signature,$pubkey);
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if(! $verify) {
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logger('mod-salmon: message did not verify using protocol. Trying padding hack.');
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$verify = rsa_verify($signed_data,$signature,$pubkey);
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}
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if(! $verify) {
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logger('mod-salmon: message did not verify using padding. Trying old statusnet hack.');
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$verify = rsa_verify($stnet_signed_data,$signature,$pubkey);
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}
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if(! $verify) {
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logger('mod-salmon: Message did not verify. Discarding.');
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http_status_exit(400);
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}
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logger('mod-salmon: Message verified.');
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/* lookup the author */
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if(! $datarray['author']['author_link'])
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logger('unable to probe - no author identifier');
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http_status_exit(400);
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}
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$r = q("select * from xchan where xchan_guid = '%s' limit 1",
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dbesc($datarray['author']['author_link'])
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);
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if(! $r) {
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if(discover_by_webbie($datarray['author']['author_link'])) {
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$r = q("select xchan_hash from xchan where xchan_guid = '%s' limit 1",
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dbesc($datarray['author']['author_link'])
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);
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if(! $r) {
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logger('discovery failed');
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http_status_exit(400);
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}
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}
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$xchan = $r[0];
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/*
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*
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* If we reached this point, the message is good. Now let's figure out if the author is allowed to send us stuff.
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*
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*/
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// First check for and process follow activity
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if(activity_match($datarray['verb'],ACTIVITY_FOLLOW) && $datarray['obj_type'] === ACTIVITY_OBJ_PERSON) {
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$r = q("select * from abook where abook_channel = %d and abook_hash = '%s' limit 1",
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intval($importer['channel_id']),
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dbesc($xchan['xchan_hash'])
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);
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if($r) {
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$contact = $r[0];
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$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;
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$abook_instance = $contact['abook_instance'];
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if($abook_instance)
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$abook_instance .= ',';
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$abook_instance .= z_root();
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$r = q("update abook set abook_their_perms = %d, abook_instance = '%s' where abook_id = %d and abook_channel = %d",
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intval($newperms),
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dbesc($abook_instance),
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intval($contact['abook_id']),
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intval($importer['channel_id'])
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);
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}
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else {
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$role = get_pconfig($importer['channel_id'],'system','permissions_role');
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if($role) {
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$x = get_role_perms($role);
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if($x['perms_auto'])
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$default_perms = $x['perms_accept'];
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}
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if(! $default_perms)
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$default_perms = intval(get_pconfig($importer['channel_id'],'system','autoperms'));
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$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;
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$closeness = get_pconfig($importer['channel_id'],'system','new_abook_closeness');
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if($closeness === false)
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$closeness = 80;
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$r = q("insert into abook ( abook_account, abook_channel, abook_xchan, abook_my_perms, abook_their_perms, abook_closeness, abook_created, abook_updated, abook_connected, abook_dob, abook_pending, abook_instance ) values ( %d, %d, '%s', %d, %d, %d, '%s', '%s', '%s', '%s', %d, '%s' )",
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intval($importer['channel_account_id']),
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intval($importer['channel_id']),
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dbesc($contact['xchan_hash']),
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intval($default_perms),
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intval($their_perms),
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intval($closeness),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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dbesc(NULL_DATE),
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intval(($default_perms) ? 0 : 1),
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dbesc(z_root())
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);
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if($r) {
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logger("New GNU-Social follower received for {$importer['channel_name']}");
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$new_connection = q("select * from abook left join xchan on abook_xchan = xchan_hash left join hubloc on hubloc_hash = xchan_hash where abook_channel = %d and abook_xchan = '%s' order by abook_created desc limit 1",
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intval($importer['channel_id']),
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dbesc($xchan['xchan_hash'])
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);
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if($new_connection) {
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require_once('include/enotify.php');
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notification(array(
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'type' => NOTIFY_INTRO,
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'from_xchan' => $xchan['xchan_hash'],
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'to_xchan' => $importer['channel_hash'],
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'link' => z_root() . '/connedit/' . $new_connection[0]['abook_id'],
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));
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if($default_perms) {
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// @fixme!!!
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// Send back a sharing notification to them
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$x = gnusoc_follow($importer,$new_connection[0]);
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if($x)
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proc_run('php','include/deliver.php',$x);
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}
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$clone = array();
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foreach($new_connection[0] as $k => $v) {
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if(strpos($k,'abook_') === 0) {
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$clone[$k] = $v;
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}
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}
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unset($clone['abook_id']);
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unset($clone['abook_account']);
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unset($clone['abook_channel']);
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$abconfig = load_abconfig($importer['channel_hash'],$clone['abook_xchan']);
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if($abconfig)
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$clone['abconfig'] = $abconfig;
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build_sync_packet($importer['channel_id'], array('abook' => array($clone)));
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}
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http_status_exit(200);
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}
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}
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}
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//
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// ... fixme
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// Otherwise check general permissions
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if(! perm_is_allowed($importer['channel_id'],$xchan['xchan_hash'],'send_stream')) {
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// check for and process ostatus autofriend
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// ... fixme
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// otherwise
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logger('mod-salmon: Ignoring this author.');
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http_status_exit(202);
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// NOTREACHED
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}
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unset($datarray['author']);
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$parent_item = null;
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if($datarray['parent_mid']) {
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$r = q("select * from item where mid = '%s' and uid = %d limit 1",
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dbesc($datarray['parent_mid']),
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intval($importer['channel_id'])
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);
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if(! $r) {
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logger('mod-salmon: parent item not found.');
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http_status_exit(202);
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}
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$parent_item = $r[0];
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}
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if(! $datarray['author_xchan'])
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$datarray['author_xchan'] = $xchan['xchan_hash'];
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$datarray['owner_xchan'] = (($parent_item) ? $parent_item['owner_xchan'] : $xchan['xchan_hash']);
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$r = q("SELECT edited FROM item WHERE mid = '%s' AND uid = %d LIMIT 1",
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dbesc($datarray['mid']),
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intval($importer['channel_id'])
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);
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// Update content if 'updated' changes
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// currently a no-op @fixme
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if($r) {
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if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {
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// do not accept (ignore) an earlier edit than one we currently have.
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if(datetime_convert('UTC','UTC',$datarray['edited']) > $r[0]['edited'])
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update_feed_item($importer['channel_id'],$datarray);
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}
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http_status_exit(200);
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}
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if(! $datarray['parent_mid'])
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$datarray['parent_mid'] = $datarray['mid'];
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$datarray['aid'] = $importer['channel_account_id'];
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$datarray['uid'] = $importer['channel_id'];
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logger('consume_feed: ' . print_r($datarray,true),LOGGER_DATA);
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$xx = item_store($datarray);
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$r = $xx['item_id'];
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// if this is a reply, do a relay?
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http_status_exit(200);
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}
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function gnusoc_follow($importer,$xchan) {
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} |