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auth: Allow users without a domain

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Some deployments already have users that authenticate without a domain.
Today, we refuse to even consider those, and reject them at parsing time.

However, it is a use-case worth supporting, at least with some
restrictions that make the complexity manageable.

This patch changes the auth package to support authenticating users
without an "@domain" part.

Those requests will always be directly passed on to the fallback
authenticator, if available.

The dovecot fallback authenticator can already handle this case just fine.
This commit is contained in:
Alberto Bertogli
2021-06-11 20:05:41 +01:00
parent 099e2e2269
commit cfe0e48c0a
7 changed files with 48 additions and 21 deletions
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5
test/t-11-dovecot/config/dovecot.conf.in
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@@ -5,10 +5,11 @@ ssl = no
default_internal_user = $USER
default_login_user = $USER
# Before auth checks, rename "u@d" to "u-AT-d". This exercises that chasquid
# Before auth checks, rename "u@d" to "u-x". This exercises that chasquid
# handles well the case where the returned user information does not match the
# requested user.
auth_username_format = "%n-AT-%d"
# We drop the domain, to exercise "naked" auth handling.
auth_username_format = "%n-x"
passdb {
driver = passwd-file