Commit d4ee3023 and its parent have the history behind this code.
Since d4ee3023^, all new PreregistrationUser objects, except those for
realm creation, have a non-None `realm`. Since d4ee3023, any legacy
PreregistrationUsers, with a `realm` of None despite not being for
realm creation, are treated as expired. Now, we ignore them
completely, and remove any that exist from the database.
The user-visible effect is to change the error message for
registration (or invitation) links created before d4ee3023^ to be
"link does not exist", rather than "link expired".
This change will at most affect users upgrading straight from 1.7 or
earlier to 1.8 (rather than from 1.7.1), but I think that's not much
of a concern (such installations are probably long-running
installations, without many live registration or invitation links).
[greg: tweaked commit message]
[Modified by greg to (1) keep `USERNAME_FIELD = 'email'`,
(2) silence the corresponding system check, and (3) ban
reusing a system bot's email address, just like we do in
realm creation.]
As we migrate to allow reuse of the same email with multiple realms,
we need to replace the old "no email reuse" validators. Because
stealing the email for a system bot would be problematic, we still ban
doing so.
This commit only affects the realm creation logic, not registering an
account in an existing realm.
The one thing this bit of logic is used for is to decide whether
there's an existing user which is a mirror dummy that we should
activate. This change causes us to ignore such an existing user if
it's on some other realm, and go straight into `do_create_user`.
This completes the last commit's work to fix CVE-2017-0910, applying
to any invite links already created before the fix was deployed. With
this change, all new-user registrations must match an explicit realm
in the PreregistrationUser row, except when creating a new realm.
[greg: rewrote commit message]
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]
Previously, this was a ValidationError, but that doesn't really make
sense, since this condition reflects an actual bug in the code.
Because this happened to be our only test coverage the ValidationError
catch on line 84 of registration.py, we add nocoverage there for now.
I remember being really confused by this function in the past, and I finally
figured it out. It should be removed, and the dev_url added by
00-realm-creation should call a function that just gets the confirmation_key
from outbox like all of the backend tests, but until then this comment
should help.
This change:
* Prevents weird potential attacks like taking a valid confirmation link
(say an unsubscribe link), and putting it into the URL of a multiuse
invite link. I don't know of any such attacks one could do right now, but
reasoning about it is complicated.
* Makes the code easier to read, and in the case of confirmation/views.py,
exposes something that needed refactoring anyway (USER_REGISTRATION and
INVITATION should have different endpoints, and both of those endpoints
should be in zerver/views/registration, not this file).
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.
Tweaked by tabbott to have the field before the invitation is
completed be called invite_as_admins, not invited_as_admins, for
readability.
Fixes#6834.
Wherever possible, we always want to move checking for error
conditions to the views code, so that we don't need to worry about
handling failures with (in this case) a user that's half-created
because a DefaultStreamGroup doesn't exist.
This effectively implements the feature of default stream groups,
except for a UI, nice styling, etc.
Note that we're careful to not have this do anything in an
organization that doesn't have any default stream groups.
While it's totally fine to put a leading '.' before the cookie domain
for normal hostnames and browsers will just strip them, if you're
using an IP address, it doesn't work, because .127.0.0.1 (for example)
is just invalid, and the cookie won't be set.
This fixes an issue where after installing with an IP address, realm
creation would end with being stuck at a blank page for
/accounts/login/subdomain/.
While our recent changing to hide /register means we don't need a nice
pretty error message here, eventually we'll want to clean up the error
message.
Fixes#7047.
This new function extractions the bit of logic we use after creating a
new user account to log them in and send them to the home page,
without emailing the user about their new login.
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.
Unlike creating a stream, there's really no reason one would want to
call the function to create a realm while uncertain whether that realm
already existed.
Rishi Gupta
Tim Abbott
Greg Price
rht
Vishnu Ks
Vishnu Ks
Umair Khan
Steve Howell