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Vince Brimhall <vbrimhall@novell.com> - slight tidyup by me to
use Samba conventions.
Vince - thanks a *lot* for this code - please test to make sure
I haven't messed anything up.
Jeremy.
For a (very) long time, we have had a bug in Samba were an NTLMv2-only
PDC would fail, because it converted the password into NTLM format for
checking.
This patch performs the direct comparison required for interactive
logons to function in this situation. It also removes the 'auth flags', which
simply where not ever used.
Natrually, this plays with the size of structures, so rebuild, rebuild
rebuild...
Andrew Bartlett
subsystem into a seperate file - ntlm_check.c.
This allows us to call these routines from ntlm_auth. The purpose of this
exercise is to allow ntlm_auth (when operating as an NTLMSSP server) to
avoid talking to winbind. This should allow for easier debugging.
ntlm_auth itself has been reorgainised, so as to share more code between
the SPNEGO-wrapped and 'raw' NTLMSSP modes. A new 'client' NTLMSSP mode
has been added, for use with a Cyrus-SASL module I am writing (based on vl's
work)
Andrew Bartlett
The next move will be to remove our password checking code from the SAM
authentication backend, and into a file where other parts of samba can use
it.
The ntlm_auth changes provide for better use of common code.
Andrew Bartlett
- NTLM2 support in the server
- KEY_EXCH support in the server
- variable length session keys.
In detail:
- NTLM2 is an extension of NTLMv1, that is compatible with existing
domain controllers (unlike NTLMv2, which requires a DC upgrade).
* This is known as 'NTLMv2 session security' *
(This is not yet implemented on the RPC pipes however, so there may
well still be issues for PDC setups, particuarly around password
changes. We do not fully understand the sign/seal implications of
NTLM2 on RPC pipes.)
This requires modifications to our authentication subsystem, as we
must handle the 'challege' input into the challenge-response algorithm
being changed. This also needs to be turned off for
'security=server', which does not support this.
- KEY_EXCH is another 'security' mechanism, whereby the session key
actually used by the server is sent by the client, rather than being
the shared-secret directly or indirectly.
- As both these methods change the session key, the auth subsystem
needed to be changed, to 'override' session keys provided by the
backend.
- There has also been a major overhaul of the NTLMSSP subsystem, to merge the 'client' and 'server' functions, so they both operate on a single structure. This should help the SPNEGO implementation.
- The 'names blob' in NTLMSSP is always in unicode - never in ascii.
Don't make an ascii version ever.
- The other big change is to allow variable length session keys. We
have always assumed that session keys are 16 bytes long - and padded
to this length if shorter. However, Kerberos session keys are 8 bytes
long, when the krb5 login uses DES.
* This fix allows SMB signging on machines not yet running MIT KRB5 1.3.1. *
- Add better DEBUG() messages to ntlm_auth, warning administrators of
misconfigurations that prevent access to the privileged pipe. This
should help reduce some of the 'it just doesn't work' issues.
- Fix data_blob_talloc() to behave the same way data_blob() does when
passed a NULL data pointer. (just allocate)
REMEMBER to make clean after this commit - I have changed plenty of data structures...
* rename original sam auth method to sam_ignoredomain
* remove samstrict_dc auth method (now covered by 'sam')
* fix wbinfo -a '...' and getent passwd bugs when running
winbindd on a samba PDC (reported by Volker)
me to review it).
This patch works well for a DC running with trusted domains, becouse it lets
you check the local SAM first, but only for this domain's users.
Andrew Bartlett
password. On NT4, NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT means
the password was correct. So the PDC believed that he had his trust
account correctly added. Later the auth2 naturally failed.
BTW, setting up an interdom trust account is not what I would call
well documented and easy to handle... Working on that now :-)
Volker
structure-memcpy for DATA_BLOB parameters to using a pointer to that DATA_BLOB.
auth_sam calls some of these functions, so I've cleaned it all up to use this
format now.
Also clean up some debug statements to make them easier to read.
Andrew Bartlett
- const for PACKS() in lanman.c
- change auth to 'account before password'
- add help to net rpc {vampire,samsync}
- configure updates for sun workshop cc
- become_root() around pdb_ calls in auth_util for guest login.
Andrew Bartlett
- change auth_sam to use the initialisation flags to determine if
the password attributes are set
- add const to secrets.c, cliconnect.c
- passdb: fix spelling in pdb_ldap, add group mapping back to smbpasswd
- SAMR: add debugs to show what fails for group enum.
Andrew Bartlett
Also set the default value of all the allocated strings to "" to avoid changing
the interface (becouse pdb_get...() would point to a null string, rather than a
null pointer and parts of samba rely on that).
Andrew Bartlett
Replace this with some flags that *we* define. We can do a mapping later
if we actually get some more reliable info about what passwords are actually
valid.
Andrew Bartlett
The auth_authsupplied_info typedef is now just a plain struct - auth_context,
but it has been modified to contain the function pointers to the rest
of the auth subsystem's components.
(Who needs non-static functions anyway?)
In working all this mess out, I fixed a number of memory leaks and moved the
entire auth subsystem over to talloc().
Note that the TALLOC_CTX attached to the auth_context can be rather long-lived,
it is provided for things that are intended to live as long. (The
global_negprot_auth_context lasts the whole life of the smbd).
I've also adjusted a few things in auth_domain.c, mainly passing the domain as
a paramater to a few functions instead of looking up lp_workgroup(). I'm
hopign to make this entire thing a bit more trusted domains (as PDC) freindly
in the near future.
Other than that, I moved a bit of the code around, hence the rather messy diff.
Andrew Bartlett
- Move rpc_client/cli_trust.c to smbd/change_trust_pw.c
- It hasn't been used by anything else since smbpasswd lost its -j
- Add a TALLOC_CTX to the auth subsytem. These are only valid for the length
of the calls to the individual modules, if you want a longer context hide it
in your private data.
Similarly, all returns (like the server_info) should still be malloced.
- Move the 'ntdomain' module (security=domain in oldspeak) over to use the new
libsmb domain logon code. Also rework much of the code to use some better
helper functions for the connection - getting us much better error returns
(the new code is NTSTATUS).
The only remaining thing to do is to figure out if tpot's 0xdead 0xbeef for
the LUID feilds is sufficient, or if we should do random LUIDs as per the old
code.
Similarly, I'll move winbind over to this when I get a chance.
This leaves the SPOOLSS code and some cli_pipe code as the only stuff still in
rpc_client, at least as far as smbd is concerned.
While I've given this a basic rundown, any testing is as always appriciated.
Andrew Bartlett
We now default encrypt passwords = yes
We now check plaintext passwords (however aquired) with the 'sam' backend
rather than unix, if encrypt passwords = yes.
(this kills off the 'local' backed. The sam backend may be renamed in its
place)
The new 'samstrict' wrapper backend checks that the user's domain is one of
our netbios aliases - this ensures that we don't get fallback crazies with
security = domain.
Similarly, the code in the 'ntdomain' and 'smbserver' backends now checks
that the user was not local before contacting the DC.
The default ordering has changed, we now check the local stuff first - but
becouse of the changes above, we will really only ever contact one
auth source.
Andrew Bartlett
subystem.
The particular aim is to modularized the interface - so that we
can have arbitrary password back-ends.
This code adds one such back-end, a 'winbind' module to authenticate
against the winbind_auth_crap functionality. While fully-functional
this code is mainly useful as a demonstration, because we don't get
back the info3 as we would for direct ntdomain authentication.
This commit introduced the new 'auth methods' parameter, in the
spirit of the 'auth order' discussed on the lists. It is renamed
because not all the methods may be consulted, even if previous
methods fail - they may not have a suitable challenge for example.
Also, we have a 'local' authentication method, for old-style
'unix if plaintext, sam if encrypted' authentication and a
'guest' module to handle guest logins in a single place.
While this current design is not ideal, I feel that it does
provide a better infrastructure than the current design, and can
be built upon.
The following parameters have changed:
- use rhosts =
This has been replaced by the 'rhosts' authentication method,
and can be specified like 'auth methods = guest rhosts'
- hosts equiv =
This needs both this parameter and an 'auth methods' entry
to be effective. (auth methods = guest hostsequiv ....)
- plaintext to smbpasswd =
This is replaced by specifying 'sam' rather than 'local'
in the auth methods.
The security = parameter is unchanged, and now provides defaults
for the 'auth methods' parameter.
The available auth methods are:
guest
rhosts
hostsequiv
sam (passdb direct hash access)
unix (PAM, crypt() etc)
local (the combination of the above, based on encryption)
smbserver (old security=server)
ntdomain (old security=domain)
winbind (use winbind to cache DC connections)
Assistance in testing, or the production of new and interesting
authentication modules is always appreciated.
Andrew Bartlett
