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provide a keychange operation to rebase an identity on a new keypair

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This commit is contained in:
zotlabs 2017-07-24 20:23:00 -07:00
parent 5ed4ed2246
commit 6a7fa6bf54
7 changed files with 405 additions and 2 deletions
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25
Zotlabs/Daemon/Notifier.php
View File

@ -67,6 +67,7 @@ require_once('include/bbcode.php');
* location channel_id
* request channel_id xchan_hash message_id
* rating xlink_id
* keychange channel_id
*
*/
@ -144,6 +145,20 @@ class Notifier {
$packet_type = 'request';
$normal_mode = false;
}
elseif($cmd === 'keychange') {
$channel = channelx_by_n($item_id);
$r = q("select abook_xchan from abook where abook_channel = %d",
intval($item_id)
);
if($r) {
foreach($r as $rr) {
$recipients[] = $rr['abook_xchan'];
}
}
$private = false;
$packet_type = 'keychange';
$normal_mode = false;
}
elseif($cmd == 'permission_update' || $cmd == 'permission_create') {
// Get the (single) recipient
$r = q("select * from abook left join xchan on abook_xchan = xchan_hash where abook_id = %d and abook_self = 0",
@ -570,12 +585,17 @@ class Notifier {
}
$hash = random_string();
$hash = random_string();
$packet = null;
$pmsg = '';
if($packet_type === 'refresh' || $packet_type === 'purge') {
$packet = zot_build_packet($channel,$packet_type,(($packet_recips) ? $packet_recips : null));
}
if($packet_type === 'keychange') {
$packet = zot_build_packet($channel,$packet_type,(($packet_recips) ? $packet_recips : null));
$pmsg = get_pconfig($channel['channel_id'],'system','keychange');
}
elseif($packet_type === 'request') {
$env = (($hub_env && $hub_env[$hub['hubloc_host'] . $hub['hubloc_sitekey']]) ? $hub_env[$hub['hubloc_host'] . $hub['hubloc_sitekey']] : '');
$packet = zot_build_packet($channel,$packet_type,$env,$hub['hubloc_sitekey'],$hub['site_crypto'],
@ -589,7 +609,8 @@ class Notifier {
'account_id' => $channel['channel_account_id'],
'channel_id' => $channel['channel_id'],
'posturl' => $hub['hubloc_callback'],
'notify' => $packet
'notify' => $packet,
'msg' => (($pmsg) ? json_encode($pmsg) : '')
));
}
else {

2
Zotlabs/Zot/IHandler.php
View File

@ -12,6 +12,8 @@ interface IHandler {
function Request($data);
function Rekey($sender,$data);
function AuthCheck($data,$encrypted);
function Purge($sender,$recipients);

4
Zotlabs/Zot/Receiver.php
View File

@ -120,6 +120,10 @@ class Receiver {
$this->handler->Notify($this->data);
break;
case 'rekey':
$this->handler->Rekey($this->sender, $this->data);
break;
default:
$this->response['message'] = 'Not implemented';
json_return_and_die($this->response);

4
Zotlabs/Zot/ZotHandler.php
View File

@ -20,6 +20,10 @@ class ZotHandler implements IHandler {
zot_reply_message_request($data);
}
function Rekey($sender,$data) {
zot_rekey_request($sender,$data);
}
function AuthCheck($data,$encrypted) {
zot_reply_auth_check($data,$encrypted);
}

99
include/channel.php
View File

@ -454,6 +454,105 @@ function create_identity($arr) {
return $ret;
}
function change_channel_keys($channel) {
$ret = array('success' => false);
$stored = [];
$key = new_keypair(4096);
$sig = base64url_encode(rsa_sign($channel['channel_guid'],$key['prvkey']));
$hash = make_xchan_hash($channel['channel_guid'],$sig);
$stored['old_guid'] = $channel['channel_guid'];
$stored['old_guid_sig'] = $channel['channel_guid_sig'];
$stored['old_key'] = $channel['channel_pubkey'];
$stored['old_hash'] = $channel['channel_hash'];
$stored['new_key'] = $key['pubkey'];
$stored['new_sig'] = base64url_encode(rsa_sign($key['pubkey'],$channel['channel_prvkey']));
// Save this info for the notifier to collect
set_pconfig($channel['channel_id'],'system','keychange',$stored);
$r = q("update channel set channel_prvkey = '%s', channel_pubkey = '%s', channel_guid_sig = '%s', channel_hash = '%s' where channel_id = %d",
dbesc($key['prvkey']),
dbesc($key['pubkey']),
dbesc($sig),
dbesc($hash),
intval($channel['channel_id'])
);
if(! $r) {
return $ret;
}
$r = q("select * from channel where channel_id = %d",
intval($channel['channel_id'])
);
if(! $r) {
$ret['message'] = t('Unable to retrieve modified identity');
return $ret;
}
$modified = $r[0];
$h = q("select * from hubloc where hubloc_hash = '%s' and hubloc_url = '%s' ",
dbesc($stored['old_hash']),
dbesc(z_root())
);
if($h) {
foreach($h as $hv) {
$hv['hubloc_guid_sig'] = $sig;
$hv['hubloc_hash'] = $hash;
$hv['hubloc_url_sig'] = base64url_encode(rsa_sign(z_root(),$modifed['channel_prvkey']));
hubloc_store_lowlevel($hv);
}
}
$x = q("select * from xchan where xchan_hash = '%s' ",
dbesc($stored['old_hash'])
);
$check = q("select * from xchan where xchan_hash = '%s'",
dbesc($hash)
);
if(($x) && (! $check)) {
$oldxchan = $x[0];
foreach($x as $xv) {
$xv['xchan_guid_sig'] = $sig;
$xv['xchan_hash'] = $hash;
$xv['xchan_pubkey'] = $key['pubkey'];
xchan_store_lowlevel($xv);
$newxchan = $xv;
}
}
$a = q("select * from abook where abook_xchan = '%s' and abook_self = 1",
dbesc($stored['old_hash'])
);
if($a) {
q("update abook set abook_xchan = '%s' where abook_id = %d",
dbesc($hash),
intval($a[0]['abook_id'])
);
}
xchan_change_key($oldxchan,$newxchan,$stored);
Zotlabs\Daemon\Master::Summon(array('Notifier', 'keychange', $channel['channel_id']));
$ret['success'] = true;
return $ret;
}
/**
* @brief Set default channel to be used on login.
*

229
include/xchan.php
View File

@ -137,3 +137,232 @@ function xchan_fetch($arr) {
}
function xchan_change_key($oldx,$newx,$data) {
$r = q("update abook set abook_xchan = '%s' where abook_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update abconfig set xchan = '%s' where xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update group_member set xchan = '%s' where xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update chat set chat_xchan = '%s' where chat_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update chatpresence set cp_xchan = '%s' where cp_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update event set event_xchan = '%s' where event_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update item set owner_xchan = '%s' where owner_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update item set author_xchan = '%s' where author_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update item set source_xchan = '%s' where source_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update mail set from_xchan = '%s' where from_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update mail set to_xchan = '%s' where to_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update shares set share_xchan = '%s' where share_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update source set src_channel_xchan = '%s' where src_channel_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update source set src_xchan = '%s' where src_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update xchat set xchat_xchan = '%s' where xchat_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update xconfig set xchan = '%s' where xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update xign set xchan = '%s' where xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update xlink set xlink_xchan = '%s' where xlink_xchan = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update xprof set xprof_hash = '%s' where xprof_hash = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("update xtag set xtag_hash = '%s' where xtag_hash = '%s'",
dbsec($newx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
$r = q("select channel_id, channel_allow_cid, channel_deny_cid from channel where (channel_allow_cid like '%s' or channel_deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update channel set channel_allow_cid = '%s', channel_deny_cid = '%s' where channel_id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['channel_allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['channel_deny_cid'])),
intval($rv['channel_id'])
);
}
}
$r = q("select id, allow_cid, deny_cid from attach where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update attach set allow_cid = '%s', deny_cid = '%s' where id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['id'])
);
}
}
$r = q("select cr_id, allow_cid, deny_cid from chatroom where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update chatroom set allow_cid = '%s', deny_cid = '%s' where cr_id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['cr_id'])
);
}
}
$r = q("select id, allow_cid, deny_cid from event where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update event set allow_cid = '%s', deny_cid = '%s' where id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['id'])
);
}
}
$r = q("select id, allow_cid, deny_cid from item where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update item set allow_cid = '%s', deny_cid = '%s' where id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['id'])
);
}
}
$r = q("select mitem_id, allow_cid, deny_cid from menu_item where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update menu_item set allow_cid = '%s', deny_cid = '%s' where mitem_id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['mitem_id'])
);
}
}
$r = q("select obj_id, allow_cid, deny_cid from obj where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update obj set allow_cid = '%s', deny_cid = '%s' where obj_id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['obj_id'])
);
}
}
$r = q("select id, allow_cid, deny_cid from photo where (allow_cid like '%s' or deny_cid like '%s') ",
dbesc($oldx['xchan_hash']),
dbesc($oldx['xchan_hash'])
);
if($r) {
foreach($r as $rv) {
$z = q("update photo set allow_cid = '%s', deny_cid = '%s' where id = %d",
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['allow_cid'])),
dbesc(str_replace('<' . $oldx['xchan_hash'] . '>', '<' . $newx['xchan_hash'] . '>', $rv['deny_cid'])),
intval($rv['id'])
);
}
}
}

44
include/zot.php
View File

@ -3757,6 +3757,50 @@ function zot_reply_message_request($data) {
json_return_and_die($ret);
}
function zot_rekey_request($sender,$data) {
$ret = array('success' => false);
// newsig is newkey signed with oldkey
// The original xchan will remain. In Zot/Receiver we will have imported the new xchan and hubloc to verify
// the packet authenticity. What we will do now is verify that the keychange operation was signed by the
// oldkey, and if so change all the abook, abconfig, group, and permission elements which reference the
// old xchan_hash.
if((! $data['oldkey']) && (! $data['oldsig']) && (! $data['newkey']) && (! $data['newsig']))
json_return_and_die($ret);
$oldhash = make_xchan_hash($data['old_guid'],$data['old_guid_sig']);
$r = q("select * from xchan where xchan_hash = '%s' limit 1",
dbesc($oldhash)
);
if(! $r) {
json_return_and_die($ret);
}
$xchan = $r[0];
if(! rsa_verify($data['newkey'],base64url_decode($data['newsig']),$xchan['xchan_pubkey'])) {
json_return_and_die($ret);
}
$newhash = make_xchan_hash($sender['guid'],$sender['guid_sig']);
$r = q("select * from xchan where xchan_hash = '%s' limit 1",
dbesc($newhash)
);
$newxchan = $r[0];
xchan_change_key($xchan,$newxchan,$data);
$ret['success'] = true;
json_return_and_die($ret);
}
function zotinfo($arr) {