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would attempt to supply a password to the 'inside' NTLMSSP, which the
remote side naturally rejected.
Andrew Bartlett
(This used to be commit da408e0d5aa29ca1505c2fd96b32deae9ed940c4)
defaults specified by the caller to prevail.
Don't use NTLM2 for RPC pipes, until we know how it works in signing or sealing.
Call ntlmssp_sign_init() unconditionally in the client - we setup the
session key, why not setup the rest of the data.
Andrew Bartlett
(This used to be commit 48123f7e42c3fde85887de23c80ceee04c2f6281)
- 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...
(This used to be commit f3bbc87b0dac63426cda6fac7a295d3aad810ecc)
the bind response to WKSSVC it does not send \PIPE\ntsvcs as NT4 (did not
check w2k) but \PIPE\wkssvc. I'm not sure whether we should make this check at
all, so making it a bit more liberal should hopefully not really hurt.
Volker
(This used to be commit 029dcb351bcfab70ed0afa4acf4bd64316bfd757)
- When connecting to the NETOGON pipe, we make a call to auth2, in order
to verify our identity. This call was being made with negotiation flags
of 0x1ff. This caused our account to be downgraded. If we instead make
the call with flags > 1ff (such as 0x701ff), then this does not occour.
- This is *not* related to the use of kerberos for the CIFS-level connection
My theory is that Win2k has a test to see if we are sending *exactly* what
NT4 sent - setting any other flags seems to cause us to remain intact.
Also ensure that we only have 'setup schannel' code in a few places, not
scattered around cmd_netlogon too.
Andrew Bartlett
(This used to be commit e10f0529fe9d8d245b3cd001cce6a9a86896679c)
NTLMSSP with "" username, NULL password), and add --machine-pass (-P) to
all of Samba's clients.
When connecting to an Active Directory DC, you must initiate the CIFS level
session setup with Kerberos, not a guest login. If you don't, your machine
account is demoted to NT4.
Andrew Bartlett
(This used to be commit 3547cb3def45a90f99f67829a533eac1ccba5e77)
connection that set it up has been shut down.
(Also, pipes still connected, and reconnections to the same pipe (eg SAMR)
may continue to use that session key until their TCP/IP connection is shut
down)
Allow further testing by printing out the session key, and allowing it's input
into rpcclient.
Next step is automatic storage in a TDB.
Andrew Bartlett
(This used to be commit fa4d7be1619b51aacec37ddf995c940b8100aef9)
in both SCHANNEL and NTLMSSP.
(Try not to deal with a general case as individual special cases...)
Andrew Bartlett
(This used to be commit 6ca77bd28f16f9f65ff40bf8996e39356de5b4f8)
the schannel code, but I've included that anyway. :-)
This patch revives the client-side NTLMSSP support for RPC named pipes
in Samba, and cleans up the client and server schannel code. The use of the
new code is enabled by the 'sign', 'seal' and 'schannel' commands in
rpcclient.
The aim was to prove that our separate NTLMSSP client library actually
implements NTLMSSP signing and sealing as per Microsoft's NTLMv1 implementation,
in the hope that knowing this will assist us in correctly implementing
NTLMSSP signing for SMB packets. (Still not yet functional)
This patch replaces the NTLMSSP implementation in rpc_client/cli_pipe.c with
calls to libsmb/ntlmssp.c. In the process, we have gained the ability to
use the more secure NT password, and the ability to sign-only, instead of
having to seal the pipe connection. (Previously we were limited to sealing,
and could only use the LM-password derived key).
Our new client-side NTLMSSP code also needed alteration to cope with our
comparatively simple server-side implementation. A future step is to replace
it with calls to the same NTLMSSP library.
Also included in this patch is the schannel 'sign only' patch I submitted to
the team earlier. While not enabled (and not functional, at this stage) the
work in this patch makes the code paths *much* easier to follow. I have also
included similar hooks in rpccleint to allow the use of schannel on *any* pipe.
rpcclient now defaults to not using schannel (or any other extra per-pipe
authenticiation) for any connection. The 'schannel' command enables schannel
for all pipes until disabled.
This code is also much more secure than the previous code, as changes to our
cli_pipe routines ensure that the authentication footer cannot be removed
by an attacker, and more error states are correctly handled.
(The same needs to be done to our server)
Andrew Bartlett
(This used to be commit 5472ddc9eaf4e79c5b2e1c8ee8c7f190dc285f19)
channel:
- If the domain name passed to create_rpc_bind_req() is empty, use
lp_workgroup()
- Correctly set the auth_padding field when the send_size is a multiple
of 8 bytes
I've tested with nt4sp6 and win2ksp0 and it seems to work, although
there are no password hashes transferred from win2k. The empty
passwords are being protected by the secure channel encryption though.
(This used to be commit a8c11e855611c91e94787387c62ac629232cacfa)
useful in the auth verifier yet. So this patch ignores it.
Really checking this would be a lot more intrusive: in rpc_api_pipe we
would have to distinguish between binds and normal requests, or have
more state in the netsec info of cli_state, which is also somewhat
hackish.
Volker
(This used to be commit 8de04fcf680a9bc5054965577eb500e0541ffe66)
important once we start doing schannel, as there would be a lot more
roundtrips for the second PIPE open and bind. With this patch logging
in to a member server is a matter of two (three if you count the
ack...) packets between us and the DC.
Volker
(This used to be commit 5b3cb7725a974629d0bd8b707bc2940c36b8745e)
tidying up. Samsync still doesn't work due to bad parsing of net_io_sam_alias_info
with a blank description. Still working on this....
Jeremy.
(This used to be commit 942fede9a57a9319cf67388004dd45fa8a045f41)
rpcclient -S pdc -U% -c "samlogon user password"
and it should work with the schannel. Needs testing against platforms
different from NT4SP6.
Volker
(This used to be commit eaef0d8aeff1aa5a067679be3f17e08d7434e1e8)
dashes of const. This is a rather large check-in, some things may break.
It does compile though :-).
Jeremy.
(This used to be commit f755711df8f74f9b8e8c1a2b0d07d02a931eeb89)
generates some errors we haven't seen before which are inappropriately
logged at level 0.
(This used to be commit 40d5112048ab0943caef7149b7a0d9dee5256b87)
buffer up to the current position, and use this to dump pipe buffers
just before parsing.
(This used to be commit 92a3ab274e6cf09a8ba39b91f8bbacba6de40b37)
so that we can print it in later debug messages.
Call prs_dump to dump out requests sent by the client at sufficiently
high debug levels.
(This used to be commit 9973b22b34dc2a88a20b821d4e69f39d2a6aa6a3)
