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r23225: Attached find a patch that makes use of NetSamLogonEx in

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winbind. With this and W2k3 DCs around it is possible to use
more than one winbind on the same machine account, because
NetSamLogonEx does not use the credentials chain.

I added the flag domain->can_do_samlogon_ex because this
only works against W2k3 and with schannel. The theory is to
try if we're AD and have schannel, and fall back to
NetSamLogon if this fails. can_do_samlogon_ex is thus a
protection against multiple failures.

Only checking into 3_0, this needs more review before going
into a production release.

Feel free to comment :-)
This commit is contained in:
Volker Lendecke 2007-05-29 19:31:57 +00:00 committed by Gerald (Jerry) Carter
parent 52545d1192
commit f5d525399b
3 changed files with 71 additions and 2 deletions
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8
source/nsswitch/winbindd.h
View File

@ -169,6 +169,14 @@ struct winbindd_domain {
time_t startup_time; /* When we set "startup" true. */
BOOL startup; /* are we in the first 30 seconds after startup_time ? */
BOOL can_do_samlogon_ex; /* Due to the lack of finer control what type
* of DC we have, let us try to do a
* credential-chain less samlogon_ex call
* with AD and schannel. If this fails with
* DCERPC_FAULT_OP_RNG_ERROR, then set this
* to False. This variable is around so that
* we don't have to try _ex every time. */
/* Lookup methods for this domain (LDAP or RPC) */
struct winbindd_methods *methods;

11
source/nsswitch/winbindd_cm.c
View File

@ -2201,6 +2201,12 @@ NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
no_schannel:
if ((lp_client_schannel() == False) ||
((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
/*
* NetSamLogonEx only works for schannel
*/
domain->can_do_samlogon_ex = False;
/* We're done - just keep the existing connection to NETLOGON
* open */
conn->netlogon_pipe = netlogon_pipe;
@ -2232,6 +2238,11 @@ NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
return !NT_STATUS_IS_OK(result) ? result : NT_STATUS_PIPE_NOT_AVAILABLE;
}
/*
* Try NetSamLogonEx for AD domains
*/
domain->can_do_samlogon_ex = domain->active_directory;
*cli = conn->netlogon_pipe;
return NT_STATUS_OK;
}

54
source/nsswitch/winbindd_pam.c
View File

@ -1200,6 +1200,17 @@ NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
/* check authentication loop */
do {
NTSTATUS (*logon_fn)(struct rpc_pipe_client
*cli, TALLOC_CTX *mem_ctx,
uint32 logon_parameters,
const char *server,
const char *username,
const char *domain,
const char *workstation,
const uint8 chal[8],
DATA_BLOB lm_response,
DATA_BLOB nt_response,
NET_USER_INFO_3 *info3);
ZERO_STRUCTP(my_info3);
retry = False;
@ -1211,7 +1222,11 @@ NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
goto done;
}
result = rpccli_netlogon_sam_network_logon(netlogon_pipe,
logon_fn = contact_domain->can_do_samlogon_ex
? rpccli_netlogon_sam_network_logon_ex
: rpccli_netlogon_sam_network_logon;
result = logon_fn(netlogon_pipe,
state->mem_ctx,
0,
contact_domain->dcname, /* server name */
@ -1222,6 +1237,16 @@ NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
lm_resp,
nt_resp,
my_info3);
if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
&& contact_domain->can_do_samlogon_ex) {
DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
"retrying with NetSamLogon\n"));
contact_domain->can_do_samlogon_ex = False;
retry = True;
continue;
}
attempts += 1;
/* We have to try a second time as cm_connect_netlogon
@ -1807,6 +1832,18 @@ enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
}
do {
NTSTATUS (*logon_fn)(struct rpc_pipe_client
*cli, TALLOC_CTX *mem_ctx,
uint32 logon_parameters,
const char *server,
const char *username,
const char *domain,
const char *workstation,
const uint8 chal[8],
DATA_BLOB lm_response,
DATA_BLOB nt_response,
NET_USER_INFO_3 *info3);
ZERO_STRUCT(info3);
retry = False;
@ -1819,7 +1856,11 @@ enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
goto done;
}
result = rpccli_netlogon_sam_network_logon(netlogon_pipe,
logon_fn = contact_domain->can_do_samlogon_ex
? rpccli_netlogon_sam_network_logon_ex
: rpccli_netlogon_sam_network_logon;
result = logon_fn(netlogon_pipe,
state->mem_ctx,
state->request.data.auth_crap.logon_parameters,
contact_domain->dcname,
@ -1832,6 +1873,15 @@ enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
nt_resp,
&info3);
if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
&& contact_domain->can_do_samlogon_ex) {
DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
"retrying with NetSamLogon\n"));
contact_domain->can_do_samlogon_ex = False;
retry = True;
continue;
}
attempts += 1;
/* We have to try a second time as cm_connect_netlogon