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-rw-r--r--mod/post.php477
1 files changed, 3 insertions, 474 deletions
diff --git a/mod/post.php b/mod/post.php
index 1842d78ca..6885b0d69 100644
--- a/mod/post.php
+++ b/mod/post.php
@@ -481,6 +481,8 @@ function post_init(&$a) {
*
* @param[in,out] App &$a
*/
+
+
function post_post(&$a) {
require_once('Zotlabs/Zot/Receiver.php');
@@ -489,479 +491,6 @@ function post_post(&$a) {
// notreached;
-exit;
-
- $encrypted_packet = false;
- $ret = array('success' => false);
-
- $data = json_decode($_REQUEST['data'],true);
-
- /*
- * Many message packets will arrive encrypted. The existence of an 'iv'
- * element tells us we need to unencapsulate the AES-256-CBC content using
- * the site private key.
- */
-
- if($data && array_key_exists('iv',$data)) {
- $encrypted_packet = true;
- $data = crypto_unencapsulate($data,get_config('system','prvkey'));
- logger('mod_zot: decrypt1: ' . $data, LOGGER_DATA);
- $data = json_decode($data,true);
- }
-
- if(! $data) {
-
- // possible Bleichenbacher's attack, just treat it as a
- // message we have no handler for. It should fail a bit
- // further along with "no hub". Our public key is public
- // knowledge. There's no reason why anybody should get the
- // encryption wrong unless they're fishing or hacking. If
- // they're developing and made a goof, this can be discovered
- // in the logs of the destination site. If they're fishing or
- // hacking, the bottom line is we can't verify their hub.
- // That's all we're going to tell them.
-
- $data = array('type' => 'bogus');
- }
-
-
- $msgtype = ((array_key_exists('type',$data)) ? $data['type'] : '');
-
- if($msgtype === 'ping') {
-
- // 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- // that we may have stored are no longer valid, regardless of xchan details.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);
- }
-
-
- if($msgtype === 'pickup') {
-
- /*
- * 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 */
- }
-
- /*
- * All other message types require us to verify the sender. This is a generic check, so we
- * will do it once here and bail if anything goes wrong.
- */
-
- if (array_key_exists('sender',$data)) {
- $sender = $data['sender'];
- }
-
- /* Check if the sender is already verified here */
-
- $hubs = zot_gethub($sender,true);
-
- if (! $hubs) {
-
- /* Have never seen this guid or this guid coming from this location. Check it and register it. */
-
- // (!!) this will validate the sender
- $result = zot_register_hub($sender);
-
- if ((! $result['success']) || (! ($hubs = zot_gethub($sender,true)))) {
- $ret['message'] = 'Hub not available.';
- logger('mod_zot: no hub');
- json_return_and_die($ret);
- }
- }
-
-
- foreach($hubs as $hub) {
-
- $sitekey = $hub['hubloc_sitekey'];
-
- if(array_key_exists('sitekey',$sender) && $sender['sitekey']) {
-
- /*
- * This hub has now been proven to be valid.
- * Any hub with the same URL and a different sitekey cannot be valid.
- * Get rid of them (mark them deleted). There's a good chance they were re-installs.
- */
-
- q("update hubloc set hubloc_deleted = 1, hubloc_error = 1 where hubloc_url = '%s' and hubloc_sitekey != '%s' ",
- dbesc($hub['hubloc_url']),
- dbesc($sender['sitekey'])
- );
-
- $sitekey = $sender['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'])
- );
- }
-
- $connecting_url = $hub['hubloc_url'];
- }
-
-
- /** @TODO check which hub is primary and take action if mismatched */
-
- if (array_key_exists('recipients', $data))
- $recipients = $data['recipients'];
-
-
- if ($msgtype === 'auth_check') {
-
- /*
- * 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($ret);
- }
-
- if ($msgtype === 'request') {
- // request a particular post/conversation by message_id
- $x = zot_process_message_request($data);
- json_return_and_die($x);
- }
-
- if ($msgtype === 'purge') {
- 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']);
- }
- }
- }
- } else {
- // Unfriend everybody - basically this means the channel has committed suicide
- $arr = $data['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);
- }
- }
-
- if (($msgtype === 'refresh') || ($msgtype === 'force_refresh')) {
-
- // 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);
- }
-
- if ($msgtype === 'notify') {
-
- 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);
- }
+ exit;
- // catchall
- json_return_and_die($ret);
}