For example, this means that if a user already has an account on one
realm and they try to make an account on another by hitting "Sign in
with Google" (rather than following the little "Register" link to a
"Sign up with Google" button instead), they'll get to make an account
instead of getting an error.
Until very recently, if the user existed on another realm, any attempt
to register with that email address had to fail in the end, so this
logic gave the user a useful error message early. We introduced it in
c23aaa178 "GitHub: Show error on login page for wrong subdomain"
back in 2016-10 for that purpose. No longer! We now support reusing
an email on multiple realms, so we let the user proceed instead.
This function's interface is kind of confusing, but I believe when its
callers use it properly, `invalid_subdomain` should only ever be true
when `user_profile` is None -- in which case the revised
`invalid_subdomain` condition in this commit can never actually fire,
and the `invalid_subdomain` parameter no longer has any effect. (At
least some unit tests call this function improperly in that respect.)
I've kept this commit to a minimal change, but it would be a good
followup to go through the call sites, verify that, eliminate the use
of `invalid_subdomain`, then remove it from the function entirely.
We would allow a user with a valid invitation for one realm to use it
on a different realm instead. On a server with multiple realms, an
authorized user of one realm could use this (by sending invites to
other email addresses they control) to create accounts on other
realms. (CVE-2017-0910)
With this commit, when sending an invitation, we record the inviting
user's realm on the PreregistrationUser row; and when registering a
user, we check that the PregistrationUser realm matches the realm the
user is trying to register on. This resolves CVE-2017-0910 for
newly-sent invitations; the next commit completes the fix.
[greg: rewrote commit message]
This gets used when we call `process_client`, which we generally do at
some kind of login; and in particular, we do in the shared auth
codepath `login_or_register_remote_user`. Add a decorator to make it
easy, and use it on the various views that wind up there.
In particular, this ensures that the `query` is some reasonable
constant corresponding to the view, as intended. When not set, we
fall back in `update_user_activity` on the URL path, but in particular
for `log_into_subdomain` that can now contain a bunch of
request-specific data, which makes it (a) not aggregate properly, and
(b) not even fit in the `CHARACTER VARYING(50)` database field we've
allotted it.
The cookie mechanism only works when passing the login token to a
subdomain. URLs work across domains, which is why they're the
standard transport for SSO on the web. Switch to URLs.
Tweaked by tabbott to add a test for an expired token.
Most of these have more to do with authentication in general than with
registering a new account. `create_preregistration_user` could go
either way; we move it to `auth` so we can make the imports go only in
one direction.
These are just instances that jumped out at me while working on the
subdomains code, mostly while grepping for get_subdomain call sites.
I haven't attempted a comprehensive search, and there are likely
still others left.
If an organization doesn't have the EmailAuthBackend (which allows
password auth) enabled, then our password reset form doesn't do
anything, so we should hide it in the UI.
Since the REALMS_HAVE_SUBDOMAINS migration in development, we've had
scattered reports of users who found trying to open 127.0.0.1:9991
resulting in a redirect loop between zulipdev.com:9991,
zulipdev.com:9991/devlogin, and zulipdev.com:9991/devlogin/, and back
to zulipdev.com:9991.
We fix this temporarily through a small cleanup, which is to have that
last step in the loop send the user to the subdomain where they're
actually logged in, zulip.zulipdev.com:9991.
There's more to be done before this system will make sense, though.
Use this new variable to determine if the user already exists while
doing registration. While doing login through GitHub if we press
*Go back to login*, we pass email using email variable. As a result,
the login page starts showing the "User already exists error" if we
don't change the variable.
Previously, Zulip's server logs would not show which user or client
was involved in login or user registration actions, which made
debugging more annoying than it needed to be.
Alena Volkova
Viraat Chandra
Greg Price
Tim Abbott
rht
Vishnu Ks
derAnfaenger
darshanime
Umair Khan
Vishnu Ks