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Winbindd should always try to use LSA via an schannel authenticated ncacn_ip_tcp
connection when talking to AD for LSA lookup calls.
In Samba <-> W2k8 interdomain trust scenarios, LookupSids3 and LookupNames4 via an
schannel ncacn_ip_tcp LSA connection are the *only* options to successfully resolve
sids and names.
Guenther
There's a known bug in some Windows implementations of
DsEnumerateDomainTrusts() where domain SIDs are not returned for
transitively trusted domains within the same forest.
Jerry originally worked around this in the winbindd parent by checking
for S-0-0 and converting it to S-1-0 in 8b0fce0b. Guenter later moved
these checks into the child process in commit 3bdfcbac making the
initial patch unecessary.
I've removed it and added a clarifying comment to the child process.
If ever this SID is needed we could add an extra DsEnumerateDomainTrusts()
call in trusted_domains() as suggested by the Microsoft KB.
We need to return state->userinfo beyond the end of wb_queryuser_recv, so the
unmarshalled strings are children of that, not the state that is lost sooner.
Metze, this scheme works fine as long as we only have a single malloc'ed
entity that is returned. I think we need a different scheme in the future
when we might have more than one independent object to be returned.
Pass an explicit TALLOC_CTX* to build_id_filter() and build_alias_filter()
rather than relying upon the talloc_stackframe() behavior that
allows a caller access to stackframe ctx for called functions.
Pass a "flags" argument instead of the original winbind command down the
name_to_sid chain. This way we are independent of the winbind commands and
can take the decision at a much higher level
Btw, the previous code must have failed to warn when exceeding the high_hwm,
because it overwrote hwm with the return value of the dbwrap_store_uint32(),
which does not return the hwm but 0 or -1, depending on success.
Michael
This uses the new dbwrap_trans_change_uint32_atomic()
instead of dbwrap_change_uint32_atomic().
Now all db write operations in idmap_tdb2.c are using
transactions.
Michael
When a mapping is not found, then the idmap script is called (if defined).
When this gives a reply for the desired sid, this reply is stored in the db.
This patch wraps theses two store operations into a transaction by re-using
the idmap_tdb2_set_mapping_action() function previously defined
for idmap_tdb2_set_mapping().
Michael
When a mapping is not found, then the idmap script is called (if defined).
When this gives a reply for the desired id, this reply is stored in the db.
This patch wraps theses two store operations into a transaction by re-using
the idmap_tdb2_set_mapping_action() function previously defined
for idmap_tdb2_set_mapping().
Michael
W2K3 DC's can have IPv6 addresses but won't serve
krb5/ldap or cldap on those addresses. Make sure when
we're asking for DC's we prefer IPv4.
If you have an IPv6-only network this prioritizing code
will be a no-op. And if you have a mixed network then you
need to prioritize IPv4 due to W2K3 DC's.
Jeremy.
When looking for idle clients, we dereferenced state->response. As this is
dynamically allocated now, the proper test is whether state->response exists at
all. This is the case when an async operation is in process at that moment.
This provides a compromise between stability and performance: gencache is a
persistent database these days that for performance reasons can not use tdb
transactions for all writes. This patch splits up gencache into gencache.tdb
and gencache_notrans.tdb. gencache_notrans is used with CLEAR_IF_FIRST, writes
to it don't use transactions. By default every 5 minutes and when a program
exits, all entries from _notrans.tdb are transferred to gencache.tdb in one
transaction.
In itself, this is pretty pointless. But in the next steps I'll convert the
winbind internal communication to wb_reqtrans which allocates the request
properly. This minimizes the later diff.
Volker
When we run out of file descriptors for some reason, every new
connection forks a child that immediately panics causing smbd to
coredump. This seems unnecessarily harsh; with this code change we
now catch that error and merely log a message about it and exit
without the core dump.
Signed-off-by: Tim Prouty <tprouty@samba.org>
With the current infrastructure, we should not return error on
duplicate mappings but just warn instead (because an error would
trigger the attempt to create yet another mapping).
Michael
With the current infrastructure, we should not return error on
duplicate mappings but just warn instead (because an error would
trigger the attempt to create yet another mapping).
Michael
In winbind, we do multiple events in one select round. This needs fixing, but
as long as we're still using it, for efficiency reasons we need to do that.
What can happen is the following: We have outgoing data pending for a client,
thus
state->fd_event.flags == EVENT_FD_WRITE
Now a new client comes in, we go through the list of clients to find an idle
one. The detection for idle clients in remove_idle_client does not take the
pending data into account. We close the socket that has pending outgoing data,
the accept(2) one syscall later gives us the same socket.
In new_connection(), we do a setup_async_read, setting up a read fde. The
select from before however had found the socket (that we had already closed!!)
to be writable. In rw_callback we only want to see a readable flag, and we
panic in the SMB_ASSERT(flags == EVENT_FD_READ).
Found using
bin/smbtorture //127.0.0.1/tmp -U% -N 500 -o 2 local-wbclient
Volker
This fixes a crash bug hit when multiple mappings were found by
the ldap search. This crash was caused by an ldap asssertion
in ldap_next_entry because was set to NULL in each iteration.
The corresponding fix was applied to the idmap_ldap_sids_to_unixids()
by Jerry in 2007 (b066668b74).
This fixes the crash part of bug #6387.
There is a logic part, too:
The problem currently only occurs when multiple mappings are found
for one given unixid. Now winbindd does not crash any more but
it does not correctly handle this situation. It just returns the
last mapping from the ldap search results.
This needs fixing.
Michael
This commit is mostly to cope with the removal of SamOemHash (replaced
by arcfour_crypt()) and other collisions (such as changed function
arguments compared to Samba3).
We still provide creds_hash3 until Samba3 uses the credentials code in
netlogon server
Andrew Bartlett
Also remove ads_memfree(), which was only ever a wrapper around
SAFE_FREE, used only to free the DN from ads_get_ds().
This actually makes libgpo more consistant, as it mixed a talloc and a
malloc based string on the same element.
Andrew Bartlett
Signed-off-by: Günther Deschner <gd@samba.org>
* Adds wbcGetSidAliases that calls the lookup_useraliases function.
* Updates wbinfo and winbind_util.c to call the new function.
* Also added winbind_get_groups helper function.
* Adds the plumbing required to lookup users by sid into winbind, wbinfo
and smbd helper lib (winbind_util.c).
* Removes some double declarations of winbind_util.c functions.
* Bumps the winbind protocol version to 21 and the minor version of
wbclient to 3.
This reverts commit 487f5e7b47.
I was confused about the real meaning of find_domain_from_name_noinit()
vs. find_domain_from_name(). We don't need the connection established
here, just the domain struct which gets initialized by rescan_trusted_domains().
Sorry for the noise.
Michael
The first is "kerberos method" and replaces the "use kerberos keytab"
with an enum. Valid options are:
secrets only - use only the secrets for ticket verification (default)
system keytab - use only the system keytab for ticket verification
dedicated keytab - use a dedicated keytab for ticket verification.
secrets and keytab - use the secrets.tdb first, then the system keytab
For existing installs:
"use kerberos keytab = yes" corresponds to secrets and keytab
"use kerberos keytab = no" corresponds to secrets only
The major difference between "system keytab" and "dedicated keytab" is
that the latter method relies on kerberos to find the correct keytab
entry instead of filtering based on expected principals.
The second parameter is "dedicated keytab file", which is the keytab
to use when in "dedicated keytab" mode. This keytab is only used in
ads_verify_ticket.
"getent group" used to fill the idmap cache with negative
cache entries for unmapped group sids.
Don't pass domain name unconditionally to idmap_sid_to_gid().
idmap_sid_to_gid() only creates new mappings (allocating
idmap backends tdb, tdb2, ldap...) when the domain name passed
in is "".
Note that it is _wrong_ to directly call the idmap_sid_to_gid()
functions here, in the main winbindd. The correct fix would be
to send a sid_to_gid request to winbindd itself, but this needs
more work to prepare the async mechanisms, and we nee a quick
fix for getent passwd now.
Michael
"getent passwd" used to fill the idmap cache with negative
cache entries for unmapped user sids.
Don't pass domain name unconditionally to idmap_sid_to_[ug]id().
idmap_sid_to_[ug]id() only creates new mappings (allocating
idmap backends tdb, tdb2, ldap...) when the domain name passed
in is "".
Note that it is _wrong_ to directly call the idmap_sid_to_[ug]id()
functions here, in the main winbindd. The correct fix would be
to send a sid_to_[ug]id request to winbindd itself, but this needs
more work to prepare the async mechanisms, and we nee a quick
fix for getent passwd now.
Michael
