source: branches/samba-3.5.x/source4/winbind/wb_sam_logon.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 5.4 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Do a netr_LogonSamLogon to a remote DC
5
6 Copyright (C) Volker Lendecke 2005
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
8 Copyright (C) Stefan Metzmacher 2006
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22*/
23
24#include "includes.h"
25#include "libcli/composite/composite.h"
26#include "winbind/wb_server.h"
27#include "smbd/service_task.h"
28#include "auth/credentials/credentials.h"
29#include "libcli/auth/libcli_auth.h"
30#include "librpc/gen_ndr/ndr_netlogon.h"
31#include "librpc/gen_ndr/ndr_netlogon_c.h"
32#include "librpc/gen_ndr/winbind.h"
33
34struct wb_sam_logon_state {
35 struct composite_context *ctx;
36
37 struct winbind_SamLogon *req;
38
39 struct netlogon_creds_CredentialState *creds_state;
40 struct netr_Authenticator auth1, auth2;
41
42 TALLOC_CTX *r_mem_ctx;
43 struct netr_LogonSamLogon r;
44};
45
46static void wb_sam_logon_recv_domain(struct composite_context *ctx);
47static void wb_sam_logon_recv_samlogon(struct rpc_request *req);
48
49/*
50 Find the connection to the DC (or find an existing connection)
51*/
52struct composite_context *wb_sam_logon_send(TALLOC_CTX *mem_ctx,
53 struct wbsrv_service *service,
54 struct winbind_SamLogon *req)
55{
56 struct composite_context *c, *creq;
57 struct wb_sam_logon_state *s;
58
59 c = composite_create(mem_ctx, service->task->event_ctx);
60 if (!c) return NULL;
61
62 s = talloc_zero(c, struct wb_sam_logon_state);
63 if (composite_nomem(s, c)) return c;
64 s->ctx = c;
65 s->req = req;
66
67 c->private_data = s;
68
69 creq = wb_sid2domain_send(s, service, service->primary_sid);
70 composite_continue(c, creq, wb_sam_logon_recv_domain, s);
71 return c;
72}
73
74/*
75 Having finished making the connection to the DC
76 Send of a SamLogon request to authenticate a user.
77*/
78static void wb_sam_logon_recv_domain(struct composite_context *creq)
79{
80 struct wb_sam_logon_state *s = talloc_get_type(creq->async.private_data,
81 struct wb_sam_logon_state);
82 struct rpc_request *req;
83 struct wbsrv_domain *domain;
84
85 s->ctx->status = wb_sid2domain_recv(creq, &domain);
86 if (!composite_is_ok(s->ctx)) return;
87
88 s->creds_state = cli_credentials_get_netlogon_creds(domain->libnet_ctx->cred);
89 netlogon_creds_client_authenticator(s->creds_state, &s->auth1);
90
91 s->r.in.server_name = talloc_asprintf(s, "\\\\%s",
92 dcerpc_server_name(domain->netlogon_pipe));
93 if (composite_nomem(s->r.in.server_name, s->ctx)) return;
94
95 s->r.in.computer_name = cli_credentials_get_workstation(domain->libnet_ctx->cred);
96 s->r.in.credential = &s->auth1;
97 s->r.in.return_authenticator = &s->auth2;
98 s->r.in.logon_level = s->req->in.logon_level;
99 s->r.in.logon = &s->req->in.logon;
100 s->r.in.validation_level = s->req->in.validation_level;
101 s->r.out.return_authenticator = NULL;
102 s->r.out.validation = talloc(s, union netr_Validation);
103 if (composite_nomem(s->r.out.validation, s->ctx)) return;
104 s->r.out.authoritative = talloc(s, uint8_t);
105 if (composite_nomem(s->r.out.authoritative, s->ctx)) return;
106
107
108 /*
109 * use a new talloc context for the LogonSamLogon call
110 * because then we can just to a talloc_steal on this context
111 * in the final _recv() function to give the caller all the content of
112 * the s->r.out.validation
113 */
114 s->r_mem_ctx = talloc_new(s);
115 if (composite_nomem(s->r_mem_ctx, s->ctx)) return;
116
117 req = dcerpc_netr_LogonSamLogon_send(domain->netlogon_pipe, s->r_mem_ctx, &s->r);
118 composite_continue_rpc(s->ctx, req, wb_sam_logon_recv_samlogon, s);
119}
120
121/*
122 NTLM Authentication
123
124 Check the SamLogon reply and decrypt the session keys
125*/
126static void wb_sam_logon_recv_samlogon(struct rpc_request *req)
127{
128 struct wb_sam_logon_state *s = talloc_get_type(req->async.private_data,
129 struct wb_sam_logon_state);
130
131 s->ctx->status = dcerpc_ndr_request_recv(req);
132 if (!composite_is_ok(s->ctx)) return;
133
134 s->ctx->status = s->r.out.result;
135 if (!composite_is_ok(s->ctx)) return;
136
137 if ((s->r.out.return_authenticator == NULL) ||
138 (!netlogon_creds_client_check(s->creds_state,
139 &s->r.out.return_authenticator->cred))) {
140 DEBUG(0, ("Credentials check failed!\n"));
141 composite_error(s->ctx, NT_STATUS_ACCESS_DENIED);
142 return;
143 }
144
145 /* Decrypt the session keys before we reform the info3, so the
146 * person on the other end of winbindd pipe doesn't have to.
147 * They won't have the encryption key anyway */
148 netlogon_creds_decrypt_samlogon(s->creds_state,
149 s->r.in.validation_level,
150 s->r.out.validation);
151
152 composite_done(s->ctx);
153}
154
155NTSTATUS wb_sam_logon_recv(struct composite_context *c,
156 TALLOC_CTX *mem_ctx,
157 struct winbind_SamLogon *req)
158{
159 struct wb_sam_logon_state *s = talloc_get_type(c->private_data,
160 struct wb_sam_logon_state);
161 NTSTATUS status = composite_wait(c);
162
163 if (NT_STATUS_IS_OK(status)) {
164 talloc_steal(mem_ctx, s->r_mem_ctx);
165 req->out.validation = *s->r.out.validation;
166 req->out.authoritative = 1;
167 }
168
169 talloc_free(s);
170 return status;
171}
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