diff options
Diffstat (limited to 'include/zot.php')
| -rw-r--r-- | include/zot.php | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/include/zot.php b/include/zot.php index d41d5e828..fa6258140 100644 --- a/include/zot.php +++ b/include/zot.php @@ -3989,3 +3989,422 @@ function delivery_report_is_storable($dr) { } + +function update_hub_connected($hub,$sitekey = '') { + + if($sitekey) { + + /* + * This hub has now been proven to be valid. + * Any hub with the same URL and a different sitekey cannot be valid. + * Get rid of them (mark them deleted). There's a good chance they were re-installs. + */ + + q("update hubloc set hubloc_deleted = 1, hubloc_error = 1 where hubloc_url = '%s' and hubloc_sitekey != '%s' ", + dbesc($hub['hubloc_url']), + dbesc($sitekey) + ); + + } + else { + $sitekey = $hub['sitekey']; + } + + // $sender['sitekey'] is a new addition to the protcol to distinguish + // hublocs coming from re-installed sites. Older sites will not provide + // this field and we have to still mark them valid, since we can't tell + // if this hubloc has the same sitekey as the packet we received. + + + // Update our DB to show when we last communicated successfully with this hub + // This will allow us to prune dead hubs from using up resources + + $r = q("update hubloc set hubloc_connected = '%s' where hubloc_id = %d and hubloc_sitekey = '%s' ", + dbesc(datetime_convert()), + intval($hub['hubloc_id']), + dbesc($sitekey) + ); + + // a dead hub came back to life - reset any tombstones we might have + + if(intval($hub['hubloc_error'])) { + q("update hubloc set hubloc_error = 0 where hubloc_id = %d and hubloc_sitekey = '%s' ", + intval($hub['hubloc_id']), + dbesc($sitekey) + ); + if(intval($r[0]['hubloc_orphancheck'])) { + q("update hubloc set hubloc_orhpancheck = 0 where hubloc_id = %d and hubloc_sitekey = '%s' ", + intval($hub['hubloc_id']), + dbesc($sitekey) + ); + } + q("update xchan set xchan_orphan = 0 where xchan_orphan = 1 and xchan_hash = '%s'", + dbesc($hub['hubloc_hash']) + ); + } + + return $hub['hubloc_url']; +} + + +function zot_reply_ping() { + + $ret = array('success'=> false); + + // Useful to get a health check on a remote site. + // This will let us know if any important communication details + // that we may have stored are no longer valid, regardless of xchan details. + logger('POST: got ping send pong now back: ' . z_root() , LOGGER_DEBUG ); + + $ret['success'] = true; + $ret['site'] = array(); + $ret['site']['url'] = z_root(); + $ret['site']['url_sig'] = base64url_encode(rsa_sign(z_root(),get_config('system','prvkey'))); + $ret['site']['sitekey'] = get_config('system','pubkey'); + json_return_and_die($ret); +} + +function zot_reply_pickup($data) { + + $ret = array('success'=> false); + + /* + * The 'pickup' message arrives with a tracking ID which is associated with a particular outq_hash + * First verify that that the returned signatures verify, then check that we have an outbound queue item + * with the correct hash. + * If everything verifies, find any/all outbound messages in the queue for this hubloc and send them back + */ + + if((! $data['secret']) || (! $data['secret_sig'])) { + $ret['message'] = 'no verification signature'; + logger('mod_zot: pickup: ' . $ret['message'], LOGGER_DEBUG); + json_return_and_die($ret); + } + + $r = q("select distinct hubloc_sitekey from hubloc where hubloc_url = '%s' and hubloc_callback = '%s' and hubloc_sitekey != '' group by hubloc_sitekey ", + dbesc($data['url']), + dbesc($data['callback']) + ); + if(! $r) { + $ret['message'] = 'site not found'; + logger('mod_zot: pickup: ' . $ret['message']); + json_return_and_die($ret); + } + + foreach ($r as $hubsite) { + + // verify the url_sig + // If the server was re-installed at some point, there could be multiple hubs with the same url and callback. + // Only one will have a valid key. + + $forgery = true; + $secret_fail = true; + + $sitekey = $hubsite['hubloc_sitekey']; + + logger('mod_zot: Checking sitekey: ' . $sitekey, LOGGER_DATA); + + if(rsa_verify($data['callback'],base64url_decode($data['callback_sig']),$sitekey)) { + $forgery = false; + } + if(rsa_verify($data['secret'],base64url_decode($data['secret_sig']),$sitekey)) { + $secret_fail = false; + } + if((! $forgery) && (! $secret_fail)) + break; + } + + if($forgery) { + $ret['message'] = 'possible site forgery'; + logger('mod_zot: pickup: ' . $ret['message']); + json_return_and_die($ret); + } + + if($secret_fail) { + $ret['message'] = 'secret validation failed'; + logger('mod_zot: pickup: ' . $ret['message']); + json_return_and_die($ret); + } + + /* + * If we made it to here, the signatures verify, but we still don't know if the tracking ID is valid. + * It wouldn't be an error if the tracking ID isn't found, because we may have sent this particular + * queue item with another pickup (after the tracking ID for the other pickup was verified). + */ + + $r = q("select outq_posturl from outq where outq_hash = '%s' and outq_posturl = '%s' limit 1", + dbesc($data['secret']), + dbesc($data['callback']) + ); + if(! $r) { + $ret['message'] = 'nothing to pick up'; + logger('mod_zot: pickup: ' . $ret['message']); + json_return_and_die($ret); + } + + /* + * Everything is good if we made it here, so find all messages that are going to this location + * and send them all. + */ + + $r = q("select * from outq where outq_posturl = '%s'", + dbesc($data['callback']) + ); + if($r) { + logger('mod_zot: successful pickup message received from ' . $data['callback'] . ' ' . count($r) . ' message(s) picked up', LOGGER_DEBUG); + + $ret['success'] = true; + $ret['pickup'] = array(); + foreach($r as $rr) { + if($rr['outq_msg']) { + $x = json_decode($rr['outq_msg'],true); + + if(! $x) + continue; + + if(array_key_exists('message_list',$x)) { + foreach($x['message_list'] as $xx) { + $ret['pickup'][] = array('notify' => json_decode($rr['outq_notify'],true),'message' => $xx); + } + } + else + $ret['pickup'][] = array('notify' => json_decode($rr['outq_notify'],true),'message' => $x); + $x = q("delete from outq where outq_hash = '%s'", + dbesc($rr['outq_hash']) + ); + } + } + } + + $encrypted = crypto_encapsulate(json_encode($ret),$sitekey); + json_return_and_die($encrypted); + + /* pickup: end */ +} + + + +function zot_reply_auth_check($data,$encrypted_packet) { + + $ret = array('success' => false); + + /* + * Requestor visits /magic/?dest=somewhere on their own site with a browser + * magic redirects them to $destsite/post [with auth args....] + * $destsite sends an auth_check packet to originator site + * The auth_check packet is handled here by the originator's site + * - the browser session is still waiting + * inside $destsite/post for everything to verify + * If everything checks out we'll return a token to $destsite + * and then $destsite will verify the token, authenticate the browser + * session and then redirect to the original destination. + * If authentication fails, the redirection to the original destination + * will still take place but without authentication. + */ + logger('mod_zot: auth_check', LOGGER_DEBUG); + + if (! $encrypted_packet) { + logger('mod_zot: auth_check packet was not encrypted.'); + $ret['message'] .= 'no packet encryption' . EOL; + json_return_and_die($ret); + } + + $arr = $data['sender']; + $sender_hash = make_xchan_hash($arr['guid'],$arr['guid_sig']); + + // garbage collect any old unused notifications + + // This was and should be 10 minutes but my hosting provider has time lag between the DB and + // the web server. We should probably convert this to webserver time rather than DB time so + // that the different clocks won't affect it and allow us to keep the time short. + + q("delete from verify where type = 'auth' and created < %s - INTERVAL %s", + db_utcnow(), db_quoteinterval('30 MINUTE') + ); + + $y = q("select xchan_pubkey from xchan where xchan_hash = '%s' limit 1", + dbesc($sender_hash) + ); + + // We created a unique hash in mod/magic.php when we invoked remote auth, and stored it in + // the verify table. It is now coming back to us as 'secret' and is signed by a channel at the other end. + // First verify their signature. We will have obtained a zot-info packet from them as part of the sender + // verification. + + if ((! $y) || (! rsa_verify($data['secret'], base64url_decode($data['secret_sig']),$y[0]['xchan_pubkey']))) { + logger('mod_zot: auth_check: sender not found or secret_sig invalid.'); + $ret['message'] .= 'sender not found or sig invalid ' . print_r($y,true) . EOL; + json_return_and_die($ret); + } + + // There should be exactly one recipient, the original auth requestor + + $ret['message'] .= 'recipients ' . print_r($recipients,true) . EOL; + + if ($data['recipients']) { + + $arr = $data['recipients'][0]; + $recip_hash = make_xchan_hash($arr['guid'], $arr['guid_sig']); + $c = q("select channel_id, channel_account_id, channel_prvkey from channel where channel_hash = '%s' limit 1", + dbesc($recip_hash) + ); + if (! $c) { + logger('mod_zot: auth_check: recipient channel not found.'); + $ret['message'] .= 'recipient not found.' . EOL; + json_return_and_die($ret); + } + + $confirm = base64url_encode(rsa_sign($data['secret'] . $recip_hash,$c[0]['channel_prvkey'])); + + // This additionally checks for forged sites since we already stored the expected result in meta + // and we've already verified that this is them via zot_gethub() and that their key signed our token + + $z = q("select id from verify where channel = %d and type = 'auth' and token = '%s' and meta = '%s' limit 1", + intval($c[0]['channel_id']), + dbesc($data['secret']), + dbesc($data['sender']['url']) + ); + if (! $z) { + logger('mod_zot: auth_check: verification key not found.'); + $ret['message'] .= 'verification key not found' . EOL; + json_return_and_die($ret); + } + $r = q("delete from verify where id = %d", + intval($z[0]['id']) + ); + + $u = q("select account_service_class from account where account_id = %d limit 1", + intval($c[0]['channel_account_id']) + ); + + logger('mod_zot: auth_check: success', LOGGER_DEBUG); + $ret['success'] = true; + $ret['confirm'] = $confirm; + if ($u && $u[0]['account_service_class']) + $ret['service_class'] = $u[0]['account_service_class']; + + // Set "do not track" flag if this site or this channel's profile is restricted + // in some way + + if (intval(get_config('system','block_public'))) + $ret['DNT'] = true; + if (! perm_is_allowed($c[0]['channel_id'],'','view_profile')) + $ret['DNT'] = true; + if (get_pconfig($c[0]['channel_id'],'system','do_not_track')) + $ret['DNT'] = true; + if (get_pconfig($c[0]['channel_id'],'system','hide_online_status')) + $ret['DNT'] = true; + + json_return_and_die($ret); + } + json_return_and_die($ret); +} + + +function zot_reply_purge($sender,$recipients) { + + $ret = array('success' => false); + + if ($recipients) { + // basically this means "unfriend" + foreach ($recipients as $recip) { + $r = q("select channel.*,xchan.* from channel + left join xchan on channel_hash = xchan_hash + where channel_guid = '%s' and channel_guid_sig = '%s' limit 1", + dbesc($recip['guid']), + dbesc($recip['guid_sig']) + ); + if ($r) { + $r = q("select abook_id from abook where uid = %d and abook_xchan = '%s' limit 1", + intval($r[0]['channel_id']), + dbesc(make_xchan_hash($sender['guid'],$sender['guid_sig'])) + ); + if ($r) { + contact_remove($r[0]['channel_id'],$r[0]['abook_id']); + } + } + } + $ret['success'] = true; + } + else { + // Unfriend everybody - basically this means the channel has committed suicide + $arr = $sender; + $sender_hash = make_xchan_hash($arr['guid'],$arr['guid_sig']); + + require_once('include/Contact.php'); + remove_all_xchan_resources($sender_hash); + + $ret['success'] = true; + json_return_and_die($ret); + } + + json_return_and_die($ret); +} + + +function zot_reply_refresh($sender,$recipients) { + + $ret = array('success' => false); + + // remote channel info (such as permissions or photo or something) + // has been updated. Grab a fresh copy and sync it. + // The difference between refresh and force_refresh is that + // force_refresh unconditionally creates a directory update record, + // even if no changes were detected upon processing. + + if($recipients) { + + // This would be a permissions update, typically for one connection + + foreach ($recipients as $recip) { + $r = q("select channel.*,xchan.* from channel + left join xchan on channel_hash = xchan_hash + where channel_guid = '%s' and channel_guid_sig = '%s' limit 1", + dbesc($recip['guid']), + dbesc($recip['guid_sig']) + ); + + $x = zot_refresh(array( + 'xchan_guid' => $sender['guid'], + 'xchan_guid_sig' => $sender['guid_sig'], + 'hubloc_url' => $sender['url'] + ), $r[0], (($msgtype === 'force_refresh') ? true : false)); + } + } + else { + // system wide refresh + + $x = zot_refresh(array( + 'xchan_guid' => $sender['guid'], + 'xchan_guid_sig' => $sender['guid_sig'], + 'hubloc_url' => $sender['url'] + ), null, (($msgtype === 'force_refresh') ? true : false)); + } + + $ret['success'] = true; + json_return_and_die($ret); + +} + + +function zot_reply_notify($data) { + + $ret = array('success' => false); + + logger('notify received from ' . $connecting_url); + + $async = get_config('system','queued_fetch'); + + if($async) { + // add to receive queue + // qreceive_add($data); + } + else { + $x = zot_fetch($data); + $ret['delivery_report'] = $x; + } + + $ret['success'] = true; + json_return_and_die($ret); + +}
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