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This fix is very subtle. If a server is configured with "security = share"
and "guest ok = yes" and winbindd is running authorization will fail during
tree connect.
This is due to our inability to map the guest sid S-1-5-21-X-501 to a uid
through sid_to_uid(). Winbindd is unaware of the hard coded mapping
between this sid and whatever uid the name in lp_guestaccount() is assigned.
So sid_to_uid() fails and we exit create_token_from_username() without
ever calling pdb_getsampwsid() which IS aware of the hard coded mapping.
This patch just reorganizes the code, moving sid_to_uid() down to the
block of code in which it is needed, avoiding this early failure.
After the discussion on samba-technical, it was decided that the best
answer for now was to revert this change. The right way to do this is
to rewrite the token api to use opaque tokens with pluggable modules.
This reverts commit 8e19a288052bca5efdb0277a40c1e0fdd099cc2b.
This new backend is custom tailored to onefs' unique requirements:
1) No fallback logic
2) Does not validate the domain of the user
3) Handles unencrypted passwords
When set to yes, "force username map" forces every user, even AD
users, through an NSS lookup. This allows the token to be overridden
with information from NSS in certain broken environments.
After a lot of testing against various Windows servers (W2K, W2K3, W2K8),
within an AD domain it seems that unknown domains will only be translated
to the local account domain, not the netbios name of the member server's
domain. This makes samba act more like Windows.
A somewhat more elegant fix than I could use for 3.2.x or 3.0.x.
Turns out the only part of check_user_ok() that needs to change
for share level security is the VUID cache pieces, so I can just
always use check_user_ok() for all lp_security() cases.
Jeremy
This is an orthogonality measure to make clear this pointer now belongs to the
cache.
(cherry picked from commit e6080c6e87d6fe3995b121a772bf3f6343fa666f)
Remove the code in memcache that does a TALLOC_FREE on stored pointers. That's a disaster waiting
to happen. If you're storing talloc'ed pointers, you can't know their lifecycle and they should
be deleted when their parent context is deleted, so freeing them at some arbitrary point later
will be a double-free.
Jeremy.
str_list_make(). From Dan Sledz <dan.sledz@isilon.com>:
In samba 3.2 passing NULL or an empty string returned NULL.
In master, it now returns a list of length 1 with the first string set
to NULL (an empty list).
Jeremy.
This authenticates against a local running samba4 using SamLogonEx. We retrieve
the machine password using samba4's mymachinepwd script and store the schannel
key for re-use in secrets.tdb.
lookup_domain_name(). This new function accept separated
strings for domain and name.
(This used to be commit 8594edf666c29fd4ddf1780da842683dd81483b6)
position zero being the primary group sid. Authenicating
via winbindd call returned a non-sorted sid list. This
fixes is for both a winbindd call and a pac list from
an info3 struct. Without this we mess up the
primary group associated with created files. Found by
Herb.
Jeremy.
(This used to be commit cb925dec85cfc4cfc194c3ff76dbeba2bd2178d7)
The Debug messages in create_builtin_users and create_builtin_users have now
been encapsulated in add_sid_to_builtin.
(This used to be commit ca153139b1dced07c196aac93dbc9d9428d98124)
Previously this was done at token creation time if the Administrators and Users
builtins hadn't been created yet. A major drawback to this approach is that if
a customer is joined to a domain and decides they want to join a different
domain, the domain groups from this new domain will not be added to the
builtins.
It would be ideal if these groups could be added exclusively at domain join
time, but we can't rely solely on that because there are cases where winbindd
must be running to allocate new gids for the builtins. In the future if there
is a way to allocate gids for builtins without running winbindd, this code
can be removed from create_local_nt_token.
- Made create_builtin_users and create_builtin_administrators non-static so
they can be called from libnet
- Added a new function to libnet_join that will make a best effort to add
domain administrators and domain users to BUILTIN\Administrators and
BUILTIN\Users, respectively. If the builtins don't exist yet, winbindd must be
running to allocate new gids, but if the builtins already exist, the domain
groups will be added even if winbindd is not running. In the case of a
failure the error will be logged, but the join will not be failed.
- Plumbed libnet_join_add_dom_rids_to_builtins into the join post processing.
(This used to be commit e92faf5996cadac480deb60a4f6232eea90b00f6)
- Modified create_builtin_administrators and add_builtin_administrators to take
in the domain sid to reduce the number of times it needs to be looked up.
- Changed create_builtin_administrators to call the new helper functions.
- Changed create_local_nt_token to call the new version of
create_builtin_administrators and handle the new error that can be returned.
- Made it more explicit that add_builtin_administrators is only called when
winbindd can't be pinged.
(This used to be commit f6411ccb4a1530034e481e1c63b6114a93317b29)
- Modified create_builtin_users to take in the domain sid to reduce the number
of times it needs to be looked up.
- Changed create_builtin_users to call the new helper functions.
- Changed create_local_nt_token to call the new version of create_builtin_users
and handle the new error that can be returned.
(This used to be commit 8d75d40b9f6d22bae7430211f8a1fe99051b756c)
Added two new helper functions which wrap the raw pdb alias functions so they
can be more conveniently called while adding domain groups to builtin groups.
(This used to be commit 668ef314559df40f1b8aa0991539adcd8d35ffe3)
This fixes various build warnings on our platform. I'm sure I haven't
caught them all, but it's a start.
(This used to be commit 6b73f259cb67d9dda9127907d706f9244a871fa3)
