Before, anyone who could create a socket.io connection to Etherpad
could read, modify, and create pads at will without authenticating
first.
The `checkAccess` middleware in `webaccess.js` normally handles
authentication and authorization, but it does not run for `/socket.io`
requests. This means that the connection handler in `socketio.js` must
handle authentication and authorization. However, before this change:
* The handler did not require a signed `express_sid` cookie.
* After loading the express-session state, the handler did not check
to see if the user had authenticated.
Now the handler requires a signed `express_sid` cookie, and it ensures
that `socket.request.session.user` is non-null if authentication is
required. (`socket.request.session.user` is non-null if and only if
the user has authenticated.)
There are two different ways an author ID becomes associated with a
user: either bound to a token or bound to a session ID. (The token and
session ID come from the `token` and `sessionID` cookies, or, in the
case of socket.io messages, from the `token` and `sessionID` message
properties.) When `settings.requireSession` is true or the user is
accessing a group pad, the session ID should be used. Otherwise the
token should be used.
Before this change, the `/p/:pad/import` handler was always using the
token, even when `settings.requireSession` was true. This caused the
following error because a different author ID was bound to the token
versus the session ID:
> Unable to import file into ${pad}. Author ${authorID} exists but he
> never contributed to this pad
This bug was reported in issue #4006. PR #4012 worked around the
problem by binding the same author ID to the token as well as the
session ID.
This change does the following:
* Modifies the import handler to use the session ID to obtain the
author ID (when appropriate).
* Expands the documentation for the SecurityManager checkAccess
function.
* Removes the workaround from PR #4012.
* Cleans up the `bin/createUserSession.js` test script.
Not all authentication plugins require the Authorization header, so it
might not be present in subsequent attempts. (In particular, a reverse
proxy might strip it.)
* Improve the comment describing how the access check works.
* Move the `authenticate` logic to where it is used so that people
don't have to keep jumping back and forth to understand how the
access check works.
* Break up the three steps to reduce the number of indentation
levels and improve readability. This should also make it easier to
implement and review planned future changes.
In this way, if the browser sends a list of preferred languages via
Accept-Language HTTP header, Etherpad will honor that.
Before this change, Etherpad always forced on the user the language from
padOptions.lang in settings.json.
This reverts a feature that was introduced in 295672f598.
If Etherpad is hosted on Windows the frontend test URI needs to be
/tests/frontend/index.html (docs say .../frontend/), otherwise there is this
error: ERR_TOO_MANY_REDIRECTS.
Fixes#3804.
This is a departure from previous versions, which did not limit import/export
requests. Now such requests are ALWAYS rate limited. The default is 10 requests
per IP each 90 seconds, and also applies to old instances upgraded to 1.8.3.
Administrators can tune the parameters via settings.importExportRateLimiting.
Importing to a pad is allowed only if an author has a session estabilished and
has already contributed to that specific pad. This means that as long as the
user is on the pad (via the browser) then import is possible.
Note that an author session is NOT the same as a group session, which is not
required.
This setting does not apply to API requests, only to /p/$PAD$/import
This change of behaviour is introduced in Etherpad 1.8.3, and cannot be
disabled.
For some weird reason, these seem to be part of the original swagger
implementation but tests assume they're turned off.
Perhaps a difference between /rest and /api?
- Tests pass ✅
- Added openapi-backend hook
- Generating OpenAPI v3 definitions for each API version
- Definitions served /api/openapi.json /api/{version}/openapi.json
The mechanism used for determining if the application is being served over SSL
is wrapped by the "express-session" library for "express_sid", and manual for
the "language" cookie, but it's very similar in both cases.
The "secure" flag is set if one of these is true:
1. we are directly serving Etherpad over SSL using the native nodejs
functionality, via the "ssl" options in settings.json
2. Etherpad is being served in plaintext by nodejs, but we are using a reverse
proxy for terminating the SSL for us;
In this case, the user has to be instructed to properly set trustProxy: true
in settings.json, and the information wheter the application is over SSL or
not will be extracted from the X-Forwarded-Proto HTTP header.
Please note that this will not be compatible with applications being served over
http and https at the same time.
The change on webaccess.js amends 009b61b338, which did not work when the SSL
termination was performed by a reverse proxy.
Reference for automatic "express_sid" configuration:
https://github.com/expressjs/session/blob/v1.17.0/README.md#cookiesecureCloses#3561.
The "io" cookie is created by socket.io, and its purpose is to offer an handle
to perform load balancing with session stickiness when the library falls back to
long polling or below.
In Etherpad's case, if an operator needs to load balance, he can use the
"express_sid" cookie, and thus "io" is of no use.
Moreover, socket.io API does not offer a way of setting the "secure" flag on it,
and thus is a liability.
Let's simply nuke it.
References:
https://socket.io/docs/using-multiple-nodes/#Sticky-load-balancinghttps://github.com/socketio/socket.io/issues/2276#issuecomment-147184662 (not totally true, actually, see above)
Do not touch vendorized files (e.g. libraries that were imported from external
projects).
No functional changes.
Command:
find . -name '*.<EXTENSION>' -type f -print0 | xargs -0 sed -i 's/[[:space:]]*$//'
