r25026: Move param/param.h out of includes.h
[kai/samba-autobuild/.git] / source4 / smb_server / smb / sesssetup.c
1
2 /* 
3    Unix SMB/CIFS implementation.
4    handle SMBsessionsetup
5    Copyright (C) Andrew Tridgell                      1998-2001
6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
7    Copyright (C) Jim McDonough                        2002
8    Copyright (C) Luke Howard                          2003
9    Copyright (C) Stefan Metzmacher                    2005
10    
11    This program is free software; you can redistribute it and/or modify
12    it under the terms of the GNU General Public License as published by
13    the Free Software Foundation; either version 3 of the License, or
14    (at your option) any later version.
15    
16    This program is distributed in the hope that it will be useful,
17    but WITHOUT ANY WARRANTY; without even the implied warranty of
18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19    GNU General Public License for more details.
20    
21    You should have received a copy of the GNU General Public License
22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "version.h"
27 #include "auth/credentials/credentials.h"
28 #include "auth/gensec/gensec.h"
29 #include "auth/auth.h"
30 #include "smb_server/smb_server.h"
31 #include "smbd/service_stream.h"
32 #include "librpc/gen_ndr/nbt.h"
33 #include "param/param.h"
34
35 /*
36   setup the OS, Lanman and domain portions of a session setup reply
37 */
38 static void sesssetup_common_strings(struct smbsrv_request *req,
39                                      char **os, char **lanman, char **domain)
40 {
41         (*os) = talloc_asprintf(req, "Unix");
42         (*lanman) = talloc_asprintf(req, "Samba %s", SAMBA_VERSION_STRING);
43         (*domain) = talloc_asprintf(req, "%s", lp_workgroup());
44 }
45
46 static void smbsrv_sesssetup_backend_send(struct smbsrv_request *req,
47                                           union smb_sesssetup *sess,
48                                           NTSTATUS status)
49 {
50         if (NT_STATUS_IS_OK(status)) {
51                 req->smb_conn->negotiate.done_sesssetup = True;
52                 /* we need to keep the session long term */
53                 req->session = talloc_steal(req->smb_conn, req->session);
54         }
55         smbsrv_reply_sesssetup_send(req, sess, status);
56 }
57
58 static void sesssetup_old_send(struct auth_check_password_request *areq,
59                                void *private_data)
60 {
61         struct smbsrv_request *req = talloc_get_type(private_data, struct smbsrv_request);
62         union smb_sesssetup *sess = talloc_get_type(req->io_ptr, union smb_sesssetup);
63         struct auth_serversupplied_info *server_info = NULL;
64         struct auth_session_info *session_info;
65         struct smbsrv_session *smb_sess;
66         NTSTATUS status;
67
68         status = auth_check_password_recv(areq, req, &server_info);
69         if (!NT_STATUS_IS_OK(status)) goto failed;
70
71         /* This references server_info into session_info */
72         status = auth_generate_session_info(req, server_info, &session_info);
73         if (!NT_STATUS_IS_OK(status)) goto failed;
74
75         /* allocate a new session */
76         smb_sess = smbsrv_session_new(req->smb_conn, req, NULL);
77         if (!smb_sess) {
78                 status = NT_STATUS_INSUFFICIENT_RESOURCES;
79                 goto failed;
80         }
81
82         /* Ensure this is marked as a 'real' vuid, not one
83          * simply valid for the session setup leg */
84         status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
85         if (!NT_STATUS_IS_OK(status)) goto failed;
86
87         /* To correctly process any AndX packet (like a tree connect)
88          * we need to fill in the session on the request here */
89         req->session = smb_sess;
90         sess->old.out.vuid = smb_sess->vuid;
91
92 failed:
93         status = auth_nt_status_squash(status);
94         smbsrv_sesssetup_backend_send(req, sess, status);
95 }
96
97 /*
98   handler for old style session setup
99 */
100 static void sesssetup_old(struct smbsrv_request *req, union smb_sesssetup *sess)
101 {
102         struct auth_usersupplied_info *user_info = NULL;
103         struct socket_address *remote_address;
104         const char *remote_machine = NULL;
105
106         sess->old.out.vuid = 0;
107         sess->old.out.action = 0;
108
109         sesssetup_common_strings(req, 
110                                  &sess->old.out.os,
111                                  &sess->old.out.lanman,
112                                  &sess->old.out.domain);
113
114         if (!req->smb_conn->negotiate.done_sesssetup) {
115                 req->smb_conn->negotiate.max_send = sess->old.in.bufsize;
116         }
117
118         if (req->smb_conn->negotiate.calling_name) {
119                 remote_machine = req->smb_conn->negotiate.calling_name->name;
120         }
121         
122         remote_address = socket_get_peer_addr(req->smb_conn->connection->socket, req);
123         if (!remote_address) goto nomem;
124
125         if (!remote_machine) {
126                 remote_machine = remote_address->addr;
127         }
128
129         user_info = talloc(req, struct auth_usersupplied_info);
130         if (!user_info) goto nomem;
131         
132         user_info->mapped_state = False;
133         user_info->logon_parameters = 0;
134         user_info->flags = 0;
135         user_info->client.account_name = sess->old.in.user;
136         user_info->client.domain_name = sess->old.in.domain;
137         user_info->workstation_name = remote_machine;
138         user_info->remote_host = talloc_steal(user_info, remote_address);
139         
140         user_info->password_state = AUTH_PASSWORD_RESPONSE;
141         user_info->password.response.lanman = sess->old.in.password;
142         user_info->password.response.lanman.data = talloc_steal(user_info, sess->old.in.password.data);
143         user_info->password.response.nt = data_blob(NULL, 0);
144
145         auth_check_password_send(req->smb_conn->negotiate.auth_context, user_info,
146                                  sesssetup_old_send, req);
147         return;
148
149 nomem:
150         smbsrv_sesssetup_backend_send(req, sess, NT_STATUS_NO_MEMORY);
151 }
152
153 static void sesssetup_nt1_send(struct auth_check_password_request *areq,
154                                void *private_data)
155 {
156         struct smbsrv_request *req = talloc_get_type(private_data, struct smbsrv_request);
157         union smb_sesssetup *sess = talloc_get_type(req->io_ptr, union smb_sesssetup);
158         struct auth_serversupplied_info *server_info = NULL;
159         struct auth_session_info *session_info;
160         struct smbsrv_session *smb_sess;
161         NTSTATUS status;
162
163         status = auth_check_password_recv(areq, req, &server_info);
164         if (!NT_STATUS_IS_OK(status)) goto failed;
165
166         /* This references server_info into session_info */
167         status = auth_generate_session_info(req, server_info, &session_info);
168         if (!NT_STATUS_IS_OK(status)) goto failed;
169
170         /* allocate a new session */
171         smb_sess = smbsrv_session_new(req->smb_conn, req, NULL);
172         if (!smb_sess) {
173                 status = NT_STATUS_INSUFFICIENT_RESOURCES;
174                 goto failed;
175         }
176
177         /* Ensure this is marked as a 'real' vuid, not one
178          * simply valid for the session setup leg */
179         status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
180         if (!NT_STATUS_IS_OK(status)) goto failed;
181
182         /* To correctly process any AndX packet (like a tree connect)
183          * we need to fill in the session on the request here */
184         req->session = smb_sess;
185         sess->nt1.out.vuid = smb_sess->vuid;
186
187         if (!session_info->server_info->authenticated) {
188                 /* don't try signing as anonymous */
189                 goto done;
190         }
191
192         if (!smbsrv_setup_signing(req->smb_conn, &session_info->session_key, &sess->nt1.in.password2)) {
193                 /* Already signing, or disabled */
194                 goto done;
195         }
196
197         /* Force check of the request packet, now we know the session key */
198         smbsrv_signing_check_incoming(req);
199 /* TODO: why don't we check the result here? */
200
201         /* Unfortunetly win2k3 as a client doesn't sign the request
202          * packet here, so we have to force signing to start again */
203
204         smbsrv_signing_restart(req->smb_conn, &session_info->session_key, &sess->nt1.in.password2);
205
206 done:
207         status = NT_STATUS_OK;
208 failed:
209         status = auth_nt_status_squash(status);
210         smbsrv_sesssetup_backend_send(req, sess, status);
211 }
212
213 /*
214   handler for NT1 style session setup
215 */
216 static void sesssetup_nt1(struct smbsrv_request *req, union smb_sesssetup *sess)
217 {
218         NTSTATUS status;
219         struct auth_context *auth_context;
220         struct auth_usersupplied_info *user_info = NULL;
221         struct socket_address *remote_address;
222         const char *remote_machine = NULL;
223         
224         sess->nt1.out.vuid = 0;
225         sess->nt1.out.action = 0;
226
227         sesssetup_common_strings(req, 
228                                  &sess->nt1.out.os,
229                                  &sess->nt1.out.lanman,
230                                  &sess->nt1.out.domain);
231
232         if (!req->smb_conn->negotiate.done_sesssetup) {
233                 req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize;
234                 req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities;
235         }
236
237         if (req->smb_conn->negotiate.oid) {
238                 if (sess->nt1.in.user && *sess->nt1.in.user) {
239                         /* We can't accept a normal login, because we
240                          * don't have a challenge */
241                         status = NT_STATUS_LOGON_FAILURE;
242                         goto failed;
243                 }
244
245                 /* TODO: should we use just "anonymous" here? */
246                 status = auth_context_create(req, 
247                                              req->smb_conn->connection->event.ctx,
248                                              req->smb_conn->connection->msg_ctx,
249                                              &auth_context);
250                 if (!NT_STATUS_IS_OK(status)) goto failed;
251         } else {
252                 auth_context = req->smb_conn->negotiate.auth_context;
253         }
254
255         if (req->smb_conn->negotiate.calling_name) {
256                 remote_machine = req->smb_conn->negotiate.calling_name->name;
257         }
258
259         remote_address = socket_get_peer_addr(req->smb_conn->connection->socket, req);
260         if (!remote_address) goto nomem;
261
262         if (!remote_machine) {
263                 remote_machine = remote_address->addr;
264         }
265
266         user_info = talloc(req, struct auth_usersupplied_info);
267         if (!user_info) goto nomem;
268
269         user_info->mapped_state = False;
270         user_info->logon_parameters = 0;
271         user_info->flags = 0;
272         user_info->client.account_name = sess->nt1.in.user;
273         user_info->client.domain_name = sess->nt1.in.domain;
274         user_info->workstation_name = remote_machine;
275         user_info->remote_host = talloc_steal(user_info, remote_address);
276         
277         user_info->password_state = AUTH_PASSWORD_RESPONSE;
278         user_info->password.response.lanman = sess->nt1.in.password1;
279         user_info->password.response.lanman.data = talloc_steal(user_info, sess->nt1.in.password1.data);
280         user_info->password.response.nt = sess->nt1.in.password2;
281         user_info->password.response.nt.data = talloc_steal(user_info, sess->nt1.in.password2.data);
282
283         auth_check_password_send(auth_context, user_info,
284                                  sesssetup_nt1_send, req);
285         return;
286
287 nomem:
288         status = NT_STATUS_NO_MEMORY;
289 failed:
290         status = auth_nt_status_squash(status);
291         smbsrv_sesssetup_backend_send(req, sess, status);
292 }
293
294 struct sesssetup_spnego_state {
295         struct smbsrv_request *req;
296         union smb_sesssetup *sess;
297         struct smbsrv_session *smb_sess;
298 };
299
300 static void sesssetup_spnego_send(struct gensec_update_request *greq, void *private_data)
301 {
302         struct sesssetup_spnego_state *s = talloc_get_type(private_data,
303                                            struct sesssetup_spnego_state);
304         struct smbsrv_request *req = s->req;
305         union smb_sesssetup *sess = s->sess;
306         struct smbsrv_session *smb_sess = s->smb_sess;
307         struct auth_session_info *session_info = NULL;
308         NTSTATUS status;
309         NTSTATUS skey_status;
310         DATA_BLOB session_key;
311
312         status = gensec_update_recv(greq, req, &sess->spnego.out.secblob);
313         if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
314                 goto done;
315         } else if (!NT_STATUS_IS_OK(status)) {
316                 goto failed;
317         }
318
319         status = gensec_session_info(smb_sess->gensec_ctx, &session_info);
320         if (!NT_STATUS_IS_OK(status)) goto failed;
321
322         skey_status = gensec_session_key(smb_sess->gensec_ctx, &session_key);
323         if (NT_STATUS_IS_OK(skey_status) &&
324             session_info->server_info->authenticated &&
325             smbsrv_setup_signing(req->smb_conn, &session_key, NULL)) {
326                 /* Force check of the request packet, now we know the session key */
327                 smbsrv_signing_check_incoming(req);
328
329                 smbsrv_signing_restart(req->smb_conn, &session_key, NULL);
330         }
331
332         /* Ensure this is marked as a 'real' vuid, not one
333          * simply valid for the session setup leg */
334         status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
335         if (!NT_STATUS_IS_OK(status)) goto failed;
336
337         req->session = smb_sess;
338
339 done:
340         sess->spnego.out.vuid = smb_sess->vuid;
341 failed:
342         status = auth_nt_status_squash(status);
343         smbsrv_sesssetup_backend_send(req, sess, status);
344         if (!NT_STATUS_IS_OK(status) && 
345             !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
346                 talloc_free(smb_sess);
347         }
348 }
349
350 /*
351   handler for SPNEGO style session setup
352 */
353 static void sesssetup_spnego(struct smbsrv_request *req, union smb_sesssetup *sess)
354 {
355         NTSTATUS status;
356         struct smbsrv_session *smb_sess = NULL;
357         struct sesssetup_spnego_state *s = NULL;
358         uint16_t vuid;
359
360         sess->spnego.out.vuid = 0;
361         sess->spnego.out.action = 0;
362
363         sesssetup_common_strings(req, 
364                                  &sess->spnego.out.os,
365                                  &sess->spnego.out.lanman,
366                                  &sess->spnego.out.workgroup);
367
368         if (!req->smb_conn->negotiate.done_sesssetup) {
369                 req->smb_conn->negotiate.max_send = sess->spnego.in.bufsize;
370                 req->smb_conn->negotiate.client_caps = sess->spnego.in.capabilities;
371         }
372
373         vuid = SVAL(req->in.hdr,HDR_UID);
374
375         /* lookup an existing session */
376         smb_sess = smbsrv_session_find_sesssetup(req->smb_conn, vuid);
377         if (!smb_sess) {
378                 struct gensec_security *gensec_ctx;
379
380                 status = gensec_server_start(req,
381                                              req->smb_conn->connection->event.ctx,
382                                              req->smb_conn->connection->msg_ctx,
383                                              &gensec_ctx);
384                 if (!NT_STATUS_IS_OK(status)) {
385                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
386                         goto failed;
387                 }
388
389                 gensec_set_credentials(gensec_ctx, req->smb_conn->negotiate.server_credentials);
390
391                 gensec_set_target_service(gensec_ctx, "cifs");
392
393                 gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY);
394
395                 status = gensec_start_mech_by_oid(gensec_ctx, req->smb_conn->negotiate.oid);
396                 if (!NT_STATUS_IS_OK(status)) {
397                         DEBUG(1, ("Failed to start GENSEC %s server code: %s\n", 
398                                   gensec_get_name_by_oid(req->smb_conn->negotiate.oid), nt_errstr(status)));
399                         goto failed;
400                 }
401
402                 /* allocate a new session */
403                 smb_sess = smbsrv_session_new(req->smb_conn, req->smb_conn, gensec_ctx);
404                 if (!smb_sess) {
405                         status = NT_STATUS_INSUFFICIENT_RESOURCES;
406                         goto failed;
407                 }
408         }
409
410         if (!smb_sess) {
411                 status = NT_STATUS_ACCESS_DENIED;
412                 goto failed;
413         }
414
415         if (!smb_sess->gensec_ctx) {
416                 status = NT_STATUS_INTERNAL_ERROR;
417                 DEBUG(1, ("Internal ERROR: no gensec_ctx on session: %s\n", nt_errstr(status)));
418                 goto failed;
419         }
420
421         s = talloc(req, struct sesssetup_spnego_state);
422         if (!s) goto nomem;
423         s->req          = req;
424         s->sess         = sess;
425         s->smb_sess     = smb_sess;
426
427         gensec_update_send(smb_sess->gensec_ctx, sess->spnego.in.secblob,
428                            sesssetup_spnego_send, s);
429         return;
430
431 nomem:
432         status = NT_STATUS_NO_MEMORY;
433 failed:
434         talloc_free(smb_sess);
435         status = auth_nt_status_squash(status);
436         smbsrv_sesssetup_backend_send(req, sess, status);
437 }
438
439 /*
440   backend for sessionsetup call - this takes all 3 variants of the call
441 */
442 void smbsrv_sesssetup_backend(struct smbsrv_request *req,
443                               union smb_sesssetup *sess)
444 {
445         switch (sess->old.level) {
446                 case RAW_SESSSETUP_OLD:
447                         sesssetup_old(req, sess);
448                         return;
449
450                 case RAW_SESSSETUP_NT1:
451                         sesssetup_nt1(req, sess);
452                         return;
453
454                 case RAW_SESSSETUP_SPNEGO:
455                         sesssetup_spnego(req, sess);
456                         return;
457
458                 case RAW_SESSSETUP_SMB2:
459                         break;
460         }
461
462         smbsrv_sesssetup_backend_send(req, sess, NT_STATUS_INVALID_LEVEL);
463 }