r4777: added a smb_composite_sesssetup() async composite function. This
[gd/samba-autobuild/.git] / source4 / smb_server / sesssetup.c
1 /* 
2    Unix SMB/CIFS implementation.
3    handle SMBsessionsetup
4    Copyright (C) Andrew Tridgell 1998-2001
5    Copyright (C) Andrew Bartlett      2001
6    Copyright (C) Jim McDonough        2002
7    Copyright (C) Luke Howard          2003
8
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 2 of the License, or
12    (at your option) any later version.
13    
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18    
19    You should have received a copy of the GNU General Public License
20    along with this program; if not, write to the Free Software
21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include "includes.h"
25 #include "auth/auth.h"
26 #include "smb_server/smb_server.h"
27
28
29 /*
30   setup the OS, Lanman and domain portions of a session setup reply
31 */
32 static void sesssetup_common_strings(struct smbsrv_request *req,
33                                      char **os, char **lanman, char **domain)
34 {
35         (*os) = talloc_asprintf(req, "Unix");
36         (*lanman) = talloc_asprintf(req, "Samba %s", SAMBA_VERSION_STRING);
37         (*domain) = talloc_asprintf(req, "%s", lp_workgroup());
38 }
39
40
41 /*
42   handler for old style session setup
43 */
44 static NTSTATUS sesssetup_old(struct smbsrv_request *req, union smb_sesssetup *sess)
45 {
46         NTSTATUS status;
47         struct auth_usersupplied_info *user_info = NULL;
48         struct auth_serversupplied_info *server_info = NULL;
49         struct auth_session_info *session_info;
50         char *remote_machine;
51         TALLOC_CTX *mem_ctx;
52
53         mem_ctx = talloc_named(req, 0, "OLD session setup");
54         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
55
56         if (!req->smb_conn->negotiate.done_sesssetup) {
57                 req->smb_conn->negotiate.max_send = sess->old.in.bufsize;
58         }
59         
60         remote_machine = socket_get_peer_addr(req->smb_conn->connection->socket, mem_ctx);
61         status = make_user_info_for_reply_enc(req->smb_conn, 
62                                               sess->old.in.user, sess->old.in.domain,
63                                               remote_machine,
64                                               sess->old.in.password,
65                                               data_blob(NULL, 0),
66                                               &user_info);
67         if (!NT_STATUS_IS_OK(status)) {
68                 talloc_free(mem_ctx);
69                 return NT_STATUS_ACCESS_DENIED;
70         }
71
72         status = auth_check_password(req->smb_conn->negotiate.auth_context,
73                                      mem_ctx, user_info, &server_info);
74         if (!NT_STATUS_IS_OK(status)) {
75                 talloc_free(mem_ctx);
76                 return auth_nt_status_squash(status);
77         }
78
79         /* This references server_info into session_info */
80         status = auth_generate_session_info(req, server_info, &session_info);
81         talloc_free(mem_ctx);
82         if (!NT_STATUS_IS_OK(status)) {
83                 return auth_nt_status_squash(status);
84         }
85
86         sess->old.out.action = 0;
87         sess->old.out.vuid = smbsrv_register_session(req->smb_conn, session_info, NULL);
88         if (sess->old.out.vuid == UID_FIELD_INVALID) {
89                 return NT_STATUS_ACCESS_DENIED;
90         }
91         sesssetup_common_strings(req, 
92                                  &sess->old.out.os,
93                                  &sess->old.out.lanman,
94                                  &sess->old.out.domain);
95
96         req->session = smbsrv_session_find(req->smb_conn, sess->old.out.vuid);
97
98         return NT_STATUS_OK;
99 }
100
101
102 /*
103   handler for NT1 style session setup
104 */
105 static NTSTATUS sesssetup_nt1(struct smbsrv_request *req, union smb_sesssetup *sess)
106 {
107         NTSTATUS status;
108         struct auth_usersupplied_info *user_info = NULL;
109         struct auth_serversupplied_info *server_info = NULL;
110         struct auth_session_info *session_info;
111         TALLOC_CTX *mem_ctx;
112         
113         mem_ctx = talloc_named(req, 0, "NT1 session setup");
114         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
115
116         if (!req->smb_conn->negotiate.done_sesssetup) {
117                 req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize;
118                 req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities;
119         }
120
121         if (req->smb_conn->negotiate.spnego_negotiated) {
122                 struct auth_context *auth_context;
123
124                 if (sess->nt1.in.user && *sess->nt1.in.user) {
125                         return NT_STATUS_ACCESS_DENIED;
126                 }
127
128                 status = make_user_info_anonymous(req->smb_conn, &user_info);
129                 if (!NT_STATUS_IS_OK(status)) {
130                         talloc_free(mem_ctx);
131                         return status;
132                 }
133
134                 /* TODO: should we use just "anonymous" here? */
135                 status = auth_context_create(req->smb_conn, lp_auth_methods(), &auth_context);
136                 if (!NT_STATUS_IS_OK(status)) {
137                         talloc_free(mem_ctx);
138                         return status;
139                 }
140
141                 status = auth_check_password(auth_context, mem_ctx,
142                                              user_info, &server_info);
143         } else {
144                 char *remote_machine;
145
146                 remote_machine = socket_get_peer_addr(req->smb_conn->connection->socket, mem_ctx);
147
148                 status = make_user_info_for_reply_enc(req->smb_conn, 
149                                                       sess->nt1.in.user, sess->nt1.in.domain,
150                                                       remote_machine,
151                                                       sess->nt1.in.password1,
152                                                       sess->nt1.in.password2,
153                                                       &user_info);
154                 if (!NT_STATUS_IS_OK(status)) {
155                         talloc_free(mem_ctx);
156                         return NT_STATUS_ACCESS_DENIED;
157                 }
158                 
159                 status = auth_check_password(req->smb_conn->negotiate.auth_context, 
160                                              req, user_info, &server_info);
161         }
162
163         if (!NT_STATUS_IS_OK(status)) {
164                 talloc_free(mem_ctx);
165                 return auth_nt_status_squash(status);
166         }
167
168         /* This references server_info into session_info */
169         status = auth_generate_session_info(mem_ctx, server_info, &session_info);
170         if (!NT_STATUS_IS_OK(status)) {
171                 talloc_free(mem_ctx);
172                 return auth_nt_status_squash(status);
173         }
174
175         sess->nt1.out.action = 0;
176         sess->nt1.out.vuid = smbsrv_register_session(req->smb_conn, session_info, NULL);
177         talloc_free(mem_ctx);
178         if (sess->nt1.out.vuid == UID_FIELD_INVALID) {
179                 return NT_STATUS_ACCESS_DENIED;
180         }
181         sesssetup_common_strings(req, 
182                                  &sess->nt1.out.os,
183                                  &sess->nt1.out.lanman,
184                                  &sess->nt1.out.domain);
185         
186         req->session = smbsrv_session_find(req->smb_conn, sess->nt1.out.vuid);
187         if (!session_info->server_info->authenticated) {
188                 return NT_STATUS_OK;
189         }
190
191         if (!srv_setup_signing(req->smb_conn, &session_info->session_key, &sess->nt1.in.password2)) {
192                 /* Already signing, or disabled */
193                 return NT_STATUS_OK;
194         }
195
196         /* Force check of the request packet, now we know the session key */
197         req_signing_check_incoming(req);
198
199         srv_signing_restart(req->smb_conn,  &session_info->session_key, &sess->nt1.in.password2);
200
201         return NT_STATUS_OK;
202 }
203
204
205 /*
206   handler for SPNEGO style session setup
207 */
208 static NTSTATUS sesssetup_spnego(struct smbsrv_request *req, union smb_sesssetup *sess)
209 {
210         NTSTATUS status = NT_STATUS_ACCESS_DENIED;
211         struct smbsrv_session *smb_sess;
212         struct gensec_security *gensec_ctx = NULL;
213         struct auth_session_info *session_info = NULL;
214         uint16_t vuid;
215
216         if (!req->smb_conn->negotiate.done_sesssetup) {
217                 req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize;
218                 req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities;
219         }
220
221         vuid = SVAL(req->in.hdr,HDR_UID);
222         smb_sess = smbsrv_session_find(req->smb_conn, vuid);
223         if (smb_sess && !smb_sess->session_info) {
224                 if (!smb_sess->gensec_ctx) {
225                         return NT_STATUS_INVALID_HANDLE;
226                 }
227
228                 status = gensec_update(smb_sess->gensec_ctx, req, sess->spnego.in.secblob, &sess->spnego.out.secblob);
229         } else {
230                 smb_sess = NULL;
231
232                 status = gensec_server_start(req->smb_conn, &gensec_ctx);
233                 if (!NT_STATUS_IS_OK(status)) {
234                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
235                         return status;
236                 }
237
238                 gensec_set_target_service(gensec_ctx, "cifs");
239
240                 gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY);
241
242                 status = gensec_start_mech_by_oid(gensec_ctx, GENSEC_OID_SPNEGO);
243                 if (!NT_STATUS_IS_OK(status)) {
244                         DEBUG(1, ("Failed to start GENSEC SPNEGO server code: %s\n", nt_errstr(status)));
245                         return status;
246                 }
247
248                 status = gensec_update(gensec_ctx, req, sess->spnego.in.secblob, &sess->spnego.out.secblob);
249
250         }
251
252         if (!smb_sess) {
253                 vuid = smbsrv_register_session(req->smb_conn, 
254                                                session_info, gensec_ctx);
255                 if (vuid == UID_FIELD_INVALID) {
256                         return NT_STATUS_ACCESS_DENIED;
257                 }
258                 smb_sess = smbsrv_session_find(req->smb_conn, vuid);
259                 if (!smb_sess) {
260                         return NT_STATUS_FOOBAR;
261                 }
262         }
263
264         if (NT_STATUS_IS_OK(status)) {
265                 DATA_BLOB session_key;
266                 
267                 status = gensec_session_info(smb_sess->gensec_ctx, &smb_sess->session_info);
268                 if (!NT_STATUS_IS_OK(status)) {
269                         return status;
270                 }
271                 
272                 status = gensec_session_key(smb_sess->gensec_ctx, 
273                                             &session_key);
274                 if (NT_STATUS_IS_OK(status) 
275                     && smb_sess->session_info->server_info->authenticated
276                     && srv_setup_signing(req->smb_conn, &session_key, NULL)) {
277                         /* Force check of the request packet, now we know the session key */
278                         req_signing_check_incoming(req);
279
280                         srv_signing_restart(req->smb_conn, &session_key, NULL);
281
282                 }
283         } else {
284                 status = auth_nt_status_squash(status);
285                 if (smb_sess->gensec_ctx && 
286                     !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
287                         talloc_free(smb_sess->gensec_ctx);
288                         smb_sess->gensec_ctx = NULL;
289                 }
290         }
291
292         sess->spnego.out.action = 0;
293         sess->spnego.out.vuid = vuid;
294         sesssetup_common_strings(req, 
295                                  &sess->spnego.out.os,
296                                  &sess->spnego.out.lanman,
297                                  &sess->spnego.out.domain);
298
299         return status;
300 }
301
302 /*
303   backend for sessionsetup call - this takes all 3 variants of the call
304 */
305 NTSTATUS sesssetup_backend(struct smbsrv_request *req, 
306                            union smb_sesssetup *sess)
307 {
308         NTSTATUS status = NT_STATUS_INVALID_LEVEL;
309
310         switch (sess->old.level) {
311                 case RAW_SESSSETUP_OLD:
312                         status = sesssetup_old(req, sess);
313                         break;
314                 case RAW_SESSSETUP_NT1:
315                         status = sesssetup_nt1(req, sess);
316                         break;
317                 case RAW_SESSSETUP_SPNEGO:
318                         status = sesssetup_spnego(req, sess);
319                         break;
320         }
321
322         if (NT_STATUS_IS_OK(status)) {
323                 req->smb_conn->negotiate.done_sesssetup = True;
324         }
325
326         return status;
327 }
328
329