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-rw-r--r--Zotlabs/Zot/Auth.php363
1 files changed, 0 insertions, 363 deletions
diff --git a/Zotlabs/Zot/Auth.php b/Zotlabs/Zot/Auth.php
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--- a/Zotlabs/Zot/Auth.php
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@@ -1,363 +0,0 @@
-<?php
-
-namespace Zotlabs\Zot;
-
-use Zotlabs\Lib\Crypto;
-
-class Auth {
-
- protected $test;
- protected $test_results;
- protected $debug_msg;
-
- protected $address;
- protected $desturl;
- protected $sec;
- protected $version;
- protected $delegate;
- protected $success;
- protected $delegate_success;
-
- protected $remote;
- protected $remote_service_class;
- protected $remote_level;
- protected $remote_hub;
- protected $dnt;
-
- function __construct($req) {
-
-
- $this->test = ((array_key_exists('test',$req)) ? intval($req['test']) : 0);
- $this->test_results = array('success' => false);
- $this->debug_msg = '';
-
- $this->success = false;
- $this->address = $req['auth'];
- $this->desturl = $req['dest'];
- $this->sec = $req['sec'];
- $this->version = $req['version'];
- $this->delegate = $req['delegate'];
-
- $c = get_sys_channel();
- if(! $c) {
- logger('unable to obtain response (sys) channel');
- $this->Debug('no local channels found.');
- $this->Finalise();
- }
-
- if(strpbrk($this->sec,'.:')) {
- logger('illegal security context');
- $this->Debug('illegal security context.');
- $this->Finalise();
- }
-
- $x = $this->GetHublocs($this->address);
-
- if($x) {
- foreach($x as $xx) {
- if($this->Verify($c,$xx))
- break;
- }
- }
-
- /**
- * @FIXME we really want to save the return_url in the session before we
- * visit rmagic. This does however prevent a recursion if you visit
- * rmagic directly, as it would otherwise send you back here again.
- * But z_root() probably isn't where you really want to go.
- */
-
- if(strstr($this->desturl,z_root() . '/rmagic'))
- goaway(z_root());
-
- $this->Finalise();
-
- }
-
- function GetHublocs($address) {
-
- // Try and find a hubloc for the person attempting to auth.
- // Since we're matching by address, we have to return all entries
- // some of which may be from re-installed hubs; and we'll need to
- // try each sequentially to see if one can pass the test
-
- $x = q("select * from hubloc left join xchan on xchan_hash = hubloc_hash
- where hubloc_addr = '%s' order by hubloc_id desc",
- dbesc($address)
- );
-
- if(! $x) {
- // finger them if they can't be found.
- $j = Finger::run($address, null);
- if ($j['success']) {
- import_xchan($j);
- $x = q("select * from hubloc left join xchan on xchan_hash = hubloc_hash
- where hubloc_addr = '%s' order by hubloc_id desc",
- dbesc($address)
- );
- }
- }
- if(! $x) {
- logger('mod_zot: auth: unable to finger ' . $address);
- $this->Debug('no hubloc found for ' . $address . ' and probing failed.');
- $this->Finalise();
- }
-
- return $x;
- }
-
-
- function Verify($channel,$hubloc) {
-
- logger('auth request received from ' . $hubloc['hubloc_addr'] );
-
- $this->remote = remote_channel();
- $this->remote_service_class = '';
- $this->remote_level = 0;
- $this->remote_hub = $hubloc['hubloc_url'];
- $this->dnt = 0;
-
- if(! $this->sec) {
- logger('missing security context.');
- if($this->test)
- $this->Debug('missing security context.');
- return false;
- }
-
-
- // check credentials and access
-
- // If they are already authenticated and haven't changed credentials,
- // we can save an expensive network round trip and improve performance.
-
- // Also check that they are coming from the same site as they authenticated with originally.
-
- $already_authed = (((remote_channel()) && ($hubloc['hubloc_hash'] == remote_channel())
- && ($hubloc['hubloc_url'] === $_SESSION['remote_hub'])) ? true : false);
-
- if($this->delegate && $this->delegate !== $_SESSION['delegate_channel'])
- $already_authed = false;
-
- if($already_authed)
- return true;
-
- if(local_channel()) {
-
- // tell them to logout if they're logged in locally as anything but the target remote account
- // in which case just shut up because they don't need to be doing this at all.
-
- if (\App::$channel['channel_hash'] == $hubloc['xchan_hash']) {
- return true;
- }
- else {
- logger('already authenticated locally as somebody else.');
- notice( t('Remote authentication blocked. You are logged into this site locally. Please logout and retry.') . EOL);
- if($this->test) {
- $this->Debug('already logged in locally with a conflicting identity.');
- return false;
- }
- }
- return false;
- }
-
- // Auth packets MUST use ultra top-secret hush-hush mode - e.g. the entire packet is encrypted using the
- // site private key
- // The actual channel sending the packet ($c[0]) is not important, but this provides a
- // generic zot packet with a sender which can be verified
-
- $x = q("select site_crypto from site where site_url = '%s' limit 1",
- dbesc($hubloc['hubloc_url'])
- );
-
- $p = zot_build_packet($channel,$type = 'auth_check',
- array(array('guid' => $hubloc['hubloc_guid'],'guid_sig' => $hubloc['hubloc_guid_sig'])),
- $hubloc['hubloc_sitekey'], (($x) ? $x[0]['site_crypto'] : ''), $this->sec);
-
- $this->Debug('auth check packet created using sitekey ' . $hubloc['hubloc_sitekey']);
- $this->Debug('packet contents: ' . $p);
-
- $result = zot_zot($hubloc['hubloc_callback'],$p);
- if(! $result['success']) {
- logger('auth_check callback failed.');
- if($this->test)
- $this->Debug('auth check request to your site returned .' . print_r($result, true));
- return false;
- }
-
- $j = json_decode($result['body'], true);
- if(! $j) {
- logger('auth_check json data malformed.');
- if($this->test)
- $this->Debug('json malformed: ' . $result['body']);
- return false;
- }
-
- $this->Debug('auth check request returned ' . print_r($j, true));
-
- if(! $j['success'])
- return false;
-
- // legit response, but we do need to check that this wasn't answered by a man-in-middle
-
- if (! Crypto::verify($this->sec . $hubloc['xchan_hash'],base64url_decode($j['confirm']),$hubloc['xchan_pubkey'])) {
- logger('final confirmation failed.');
- if($this->test)
- $this->Debug('final confirmation failed. ' . $sec . print_r($j,true) . print_r($hubloc,true));
- return false;
- }
-
- if (array_key_exists('service_class',$j))
- $this->remote_service_class = $j['service_class'];
- if (array_key_exists('level',$j))
- $this->remote_level = $j['level'];
- if (array_key_exists('DNT',$j))
- $this->dnt = $j['DNT'];
-
-
- // log them in
-
- if ($this->test) {
- // testing only - return the success result
- $this->test_results['success'] = true;
- $this->Debug('Authentication Success!');
- $this->Finalise();
- }
-
- $_SESSION['authenticated'] = 1;
-
- // check for delegation and if all is well, log them in locally with delegation restrictions
-
- $this->delegate_success = false;
-
- if($this->delegate) {
- $r = q("select * from channel left join xchan on channel_hash = xchan_hash where xchan_addr = '%s' limit 1",
- dbesc($this->delegate)
- );
- if ($r && intval($r[0]['channel_id'])) {
- $allowed = perm_is_allowed($r[0]['channel_id'],$hubloc['xchan_hash'],'delegate');
- if($allowed) {
- $_SESSION['delegate_channel'] = $r[0]['channel_id'];
- $_SESSION['delegate'] = $hubloc['xchan_hash'];
- $_SESSION['account_id'] = intval($r[0]['channel_account_id']);
- require_once('include/security.php');
- // this will set the local_channel authentication in the session
- change_channel($r[0]['channel_id']);
- $this->delegate_success = true;
- }
- }
- }
-
- if (! $this->delegate_success) {
- // normal visitor (remote_channel) login session credentials
- $_SESSION['visitor_id'] = $hubloc['xchan_hash'];
- $_SESSION['my_url'] = $hubloc['xchan_url'];
- $_SESSION['my_address'] = $this->address;
- $_SESSION['remote_service_class'] = $this->remote_service_class;
- $_SESSION['remote_level'] = $this->remote_level;
- $_SESSION['remote_hub'] = $this->remote_hub;
- $_SESSION['DNT'] = $this->dnt;
- }
-
- $arr = array('xchan' => $hubloc, 'url' => $this->desturl, 'session' => $_SESSION);
- call_hooks('magic_auth_success',$arr);
- \App::set_observer($hubloc);
- require_once('include/security.php');
- \App::set_groups(init_groups_visitor($_SESSION['visitor_id']));
- info(sprintf( t('Welcome %s. Remote authentication successful.'),$hubloc['xchan_name']));
- logger('mod_zot: auth success from ' . $hubloc['xchan_addr']);
- $this->success = true;
- return true;
- }
-
- function Debug($msg) {
- $this->debug_msg .= $msg . EOL;
- }
-
-
- function Finalise() {
-
- if($this->test) {
- $this->test_results['message'] = $this->debug_msg;
- json_return_and_die($this->test_results);
- }
-
- goaway($this->desturl);
- }
-
-}
-
-
-/**
- *
- * Magic Auth
- * ==========
- *
- * So-called "magic auth" takes place by a special exchange. On the site where the "channel to be authenticated" lives (e.g. $mysite),
- * a redirection is made via $mysite/magic to the zot endpoint of the remote site ($remotesite) with special GET parameters.
- *
- * The endpoint is typically https://$remotesite/post - or whatever was specified as the callback url in prior communications
- * (we will bootstrap an address and fetch a zot info packet if possible where no prior communications exist)
- *
- * Five GET parameters are supplied:
- * * auth => the urlencoded webbie (channel@host.domain) of the channel requesting access
- * * dest => the desired destination URL (urlencoded)
- * * sec => a random string which is also stored on $mysite for use during the verification phase.
- * * version => the zot revision
- * * delegate => optional urlencoded webbie of a local channel to invoke delegation rights for
- *
- * * test => (optional 1 or 0 - debugs the authentication exchange and returns a json response instead of redirecting the browser session)
- *
- * When this packet is received, an "auth-check" zot message is sent to $mysite.
- * (e.g. if $_GET['auth'] is foobar@podunk.edu, a zot packet is sent to the podunk.edu zot endpoint, which is typically /post)
- * If no information has been recorded about the requesting identity a zot information packet will be retrieved before
- * continuing.
- *
- * The sender of this packet is an arbitrary/random site channel. The recipients will be a single recipient corresponding
- * to the guid and guid_sig we have associated with the requesting auth identity
- *
- * \code{.json}
- * {
- * "type":"auth_check",
- * "sender":{
- * "guid":"kgVFf_...",
- * "guid_sig":"PT9-TApz...",
- * "url":"http:\/\/podunk.edu",
- * "url_sig":"T8Bp7j...",
- * "sitekey":"aMtgKTiirXrICP..."
- * },
- * "recipients":{
- * {
- * "guid":"ZHSqb...",
- * "guid_sig":"JsAAXi..."
- * }
- * }
- * "callback":"\/post",
- * "version":1,
- * "secret":"1eaa661",
- * "secret_sig":"eKV968b1..."
- * }
- * \endcode
- *
- * auth_check messages MUST use encapsulated encryption. This message is sent to the origination site, which checks the 'secret' to see
- * if it is the same as the 'sec' which it passed originally. It also checks the secret_sig which is the secret signed by the
- * destination channel's private key and base64url encoded. If everything checks out, a json packet is returned:
- *
- * \code{.json}
- * {
- * "success":1,
- * "confirm":"q0Ysovd1u...",
- * "service_class":(optional)
- * "level":(optional)
- * "DNT": (optional do-not-track - 1 or 0)
- * }
- * \endcode
- *
- * 'confirm' in this case is the base64url encoded RSA signature of the concatenation of 'secret' with the
- * base64url encoded whirlpool hash of the requestor's guid and guid_sig; signed with the source channel private key.
- * This prevents a man-in-the-middle from inserting a rogue success packet. Upon receipt and successful
- * verification of this packet, the destination site will redirect to the original destination URL and indicate a successful remote login.
- * Service_class can be used by cooperating sites to provide different access rights based on account rights and subscription plans. It is
- * a string whose contents are not defined by protocol. Example: "basic" or "gold".
- *
- * @param[in,out] \App &$a
- */
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