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GENSEC, and to pull SCHANNEL into GENSEC, by making it less 'special'.
GENSEC now no longer has it's own handling of 'set username' etc,
instead it uses cli_credentials calls.
In order to link the credentails code right though Samba, a lot of
interfaces have changed to remove 'username, domain, password'
arguments, and these have been replaced with a single 'struct
cli_credentials'.
In the session setup code, a new parameter 'workgroup' contains the
client/server current workgroup, which seems unrelated to the
authentication exchange (it was being filled in from the auth info).
This allows in particular kerberos to only call back for passwords
when it actually needs to perform the kinit.
The kerberos code has been modified not to use the SPNEGO provided
'principal name' (in the mechListMIC), but to instead use the name the
host was connected to as. This better matches Microsoft behaviour,
is more secure and allows better use of standard kerberos functions.
To achieve this, I made changes to our socket code so that the
hostname (before name resolution) is now recorded on the socket.
In schannel, most of the code from librpc/rpc/dcerpc_schannel.c is now
in libcli/auth/schannel.c, and it looks much more like a standard
GENSEC module. The actual sign/seal code moved to
libcli/auth/schannel_sign.c in a previous commit.
The schannel credentails structure is now merged with the rest of the
credentails, as many of the values (username, workstation, domain)
where already present there. This makes handling this in a generic
manner much easier, as there is no longer a custom entry-point.
The auth_domain module continues to be developed, but is now just as
functional as auth_winbind. The changes here are consequential to the
schannel changes.
The only removed function at this point is the RPC-LOGIN test
(simulating the load of a WinXP login), which needs much more work to
clean it up (it contains copies of too much code from all over the
torture suite, and I havn't been able to penetrate its 'structure').
Andrew Bartlett
less likely that anyone will use pstring for new code
- got rid of winbind_client.h from includes.h. This one triggered a
huge change, as winbind_client.h was including system/filesys.h and
defining the old uint32 and uint16 types, as well as its own
pstring and fstring.
handle the inverted memory hierarchy that a normal session
establishment gave. The inverted hierarchy came from that fact that
you first establish a socket, then a transport, then a session and
finally a tree. That leads to the socket being at the top of the
memory hierarchy and the tree at the bottom, which makes no sense from
the users point of view, as they want to be able to free the tree and
have everything disappear.
The core problem was that the libcli interface didn't distinguish
between establishing a primary context and a secondary context. If you
establish a 2nd session on a transport then you want the transport to
be referenced by the session, whereas if you establish a primary
session then you want the transport to be a child of the session.
To fix this I have added "parent_ctx" and "primary" arguments to the
libcli intialisation functions. This makes using the library much
easier, and gives us a memory hierarchy that makes much more sense.
I was prompted to do this by a bug in the cifs backend, which was
caused by the socket not being properly torn down on a disconnect due
to the inverted memory hierarchy.
encapsulates all the different session setup methods, including the
multi-pass spnego code.
I have hooked this into all the places that previously used the
RAW_SESSSETUP_GENERIC method, and have removed the old
RAW_SESSSETUP_GENERIC code from clisession.c and clitree.c. A nice
side effect is that these two modules are now very simple again, back
to being "raw" session setup handling, which was what was originally
intended.
I have also used this to replace the session setup code in the
smb_composite_connect() code, and used that to build a very simple
replacement for smbcli_tree_full_connection().
As a result, smbclient, smbtorture and all our other SMB connection
code now goes via these composite async functions. That should give
them a good workout!
interface to a complete SMB connection setup. Internally it does:
- socket connection
- session request (if needed)
- negprot
- session setup
- tcon
This is the first example of a composite function that builds on other
composite components (the socket connection is a composite function,
which is used as a building block for this function). I think this
will be quite common in composite functions in the future, building up
ever more complex composite functions from smaller building blocks,
while hiding the details from the caller.
There are two things missing from this now. The first is async name
resolution routines (wins, bcast, DNS etc), and the second is that
this code currently only does a NT1 style session setup. I'll work on
adding spnego and old style session setup support next.
- added async support to the negprot client code
- removed two unused parameters from smbcli_full_connection() code
- converted smbclient to use smbcli_full_connection() rather than
reinventing everything itself
to kukks on #samba-technical for the sniffs that allowed me to work
this out
- much simpler ntvfs open generic mapping code
- added t2open create with EA torture test to RAW-OPEN test
- tidied up some of the system includes
- moved a few more structures back from misc.idl to netlogon.idl and samr.idl now that pidl
knows about inter-IDL dependencies
rather than manual reference counts
- properly support SMBexit in the cifs and posix backends
- added a logoff method to all backends
With these changes the RAW-CONTEXT test now passes against the posix backend
but do not support SPNEGO (such as XP, when not joined to a domain).
This is triggered by the presense or lack of a security blob in the
negprot reply.
Andrew Bartlett
The bug (found by tridge) is that Win2k3 is being tighter about the
NTLMSSP flags. If we don't negotiate sealing, we can't use it.
We now have a way to indicate to the GENSEC implementation mechanisms
what things we want for a connection.
Andrew Bartlett
This version does the following:
1) talloc_free(), talloc_realloc() and talloc_steal() lose their
(redundent) first arguments
2) you can use _any_ talloc pointer as a talloc context to allocate
more memory. This allows you to create complex data structures
where the top level structure is the logical parent of the next
level down, and those are the parents of the level below
that. Then destroy either the lot with a single talloc_free() or
destroy any sub-part with a talloc_free() of that part
3) you can name any pointer. Use talloc_named() which is just like
talloc() but takes the printf style name argument as well as the
parent context and the size.
The whole thing ends up being a very simple piece of code, although
some of the pointer walking gets hairy.
So far, I'm just using the new talloc() like the old one. The next
step is to actually take advantage of the new interface
properly. Expect some new commits soon that simplify some common
coding styles in samba4 by using the new talloc().
- This causes our client and server code to use the same core code,
with the same debugs etc.
- In turn, this will allow the 'mandetory/fallback' signing algorithms
to be shared, and only written once.
Updates to the SPNEGO code
- Don't wrap an empty token to the server, if we are actually already finished.
Andrew Bartlett
- We can now connect to hosts that follow the SPNEGO RFC, and *do not*
give us their principal name in the mechListMIC.
- The client code now remembers the hostname it connects to
- We now kinit for a user, if there is not valid ticket already
- Re-introduce clock skew compensation
TODO:
- See if the username in the ccache matches the username specified
- Use a private ccache, rather then the global one, for a 'new' kinit
- Determine 'default' usernames.
- The default for Krb5 is the one in the ccache, then $USER
- For NTLMSSP, it's just $USER
Andrew Bartlett
- Spelling - it's SPNEGO, not SPENGO
- SMB signing - Krb5 logins are now correctly signed
- SPNEGO - Changes to always tell GENSEC about incoming packets, empty or not.
Andrew Bartlett
- This required using NETLOGON_NEG_AUTH2_FLAGS for the
SetupCredentials2 negotiation flags, which is what Samba3 does,
because otherwise the server uses different crypto.
- This tests the returned session keys, which we decrypt.
- Update the Samba4 notion of a 'session key' to be a DATA_BLOB in
most places.
- Fix session key code to return NT_STATUS_NO_SESSION_KEY if none is
available.
- Remove a useless argument to SMBsesskeygen_ntv1
- move netr_CredentialState from the .idl to the new credentials.h
Andrew Bartlett
