Commit | Line | Data |
---|---|---|
929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
3979877e | 2 | /* |
3979877e SF |
3 | * |
4 | * SMB/CIFS session setup handling routines | |
5 | * | |
d185cda7 | 6 | * Copyright (c) International Business Machines Corp., 2006, 2009 |
3979877e SF |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
3979877e SF |
9 | */ |
10 | ||
11 | #include "cifspdu.h" | |
12 | #include "cifsglob.h" | |
13 | #include "cifsproto.h" | |
14 | #include "cifs_unicode.h" | |
15 | #include "cifs_debug.h" | |
16 | #include "ntlmssp.h" | |
17 | #include "nterr.h" | |
9c53588e | 18 | #include <linux/utsname.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
52d00533 SF |
20 | #include <linux/version.h> |
21 | #include "cifsfs.h" | |
2442421b | 22 | #include "cifs_spnego.h" |
d70e9fa5 | 23 | #include "smb2proto.h" |
3fa1c6d1 | 24 | #include "fs_context.h" |
d70e9fa5 | 25 | |
387ec58f | 26 | static int |
9599d59e | 27 | cifs_ses_add_channel(struct cifs_ses *ses, |
387ec58f RS |
28 | struct cifs_server_iface *iface); |
29 | ||
d70e9fa5 AA |
30 | bool |
31 | is_server_using_iface(struct TCP_Server_Info *server, | |
32 | struct cifs_server_iface *iface) | |
33 | { | |
34 | struct sockaddr_in *i4 = (struct sockaddr_in *)&iface->sockaddr; | |
35 | struct sockaddr_in6 *i6 = (struct sockaddr_in6 *)&iface->sockaddr; | |
36 | struct sockaddr_in *s4 = (struct sockaddr_in *)&server->dstaddr; | |
37 | struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)&server->dstaddr; | |
38 | ||
39 | if (server->dstaddr.ss_family != iface->sockaddr.ss_family) | |
40 | return false; | |
41 | if (server->dstaddr.ss_family == AF_INET) { | |
42 | if (s4->sin_addr.s_addr != i4->sin_addr.s_addr) | |
43 | return false; | |
44 | } else if (server->dstaddr.ss_family == AF_INET6) { | |
45 | if (memcmp(&s6->sin6_addr, &i6->sin6_addr, | |
46 | sizeof(i6->sin6_addr)) != 0) | |
47 | return false; | |
48 | } else { | |
49 | /* unknown family.. */ | |
50 | return false; | |
51 | } | |
52 | return true; | |
53 | } | |
54 | ||
55 | bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface) | |
56 | { | |
57 | int i; | |
58 | ||
724244cd | 59 | spin_lock(&ses->chan_lock); |
d70e9fa5 | 60 | for (i = 0; i < ses->chan_count; i++) { |
aa45dadd | 61 | if (ses->chans[i].iface == iface) { |
724244cd | 62 | spin_unlock(&ses->chan_lock); |
d70e9fa5 | 63 | return true; |
724244cd | 64 | } |
d70e9fa5 | 65 | } |
724244cd | 66 | spin_unlock(&ses->chan_lock); |
d70e9fa5 AA |
67 | return false; |
68 | } | |
69 | ||
88b024f5 SP |
70 | /* channel helper functions. assumed that chan_lock is held by caller. */ |
71 | ||
0c51cc6f | 72 | int |
d1a931ce SP |
73 | cifs_ses_get_chan_index(struct cifs_ses *ses, |
74 | struct TCP_Server_Info *server) | |
75 | { | |
76 | unsigned int i; | |
77 | ||
88675b22 | 78 | /* if the channel is waiting for termination */ |
45be0882 | 79 | if (server && server->terminate) |
88675b22 SP |
80 | return CIFS_INVAL_CHAN_INDEX; |
81 | ||
d1a931ce SP |
82 | for (i = 0; i < ses->chan_count; i++) { |
83 | if (ses->chans[i].server == server) | |
84 | return i; | |
85 | } | |
86 | ||
87 | /* If we didn't find the channel, it is likely a bug */ | |
5d24968f SP |
88 | if (server) |
89 | cifs_dbg(VFS, "unable to get chan index for server: 0x%llx", | |
90 | server->conn_id); | |
d1a931ce | 91 | WARN_ON(1); |
0c51cc6f | 92 | return CIFS_INVAL_CHAN_INDEX; |
d1a931ce SP |
93 | } |
94 | ||
5752bf64 SP |
95 | void |
96 | cifs_chan_set_in_reconnect(struct cifs_ses *ses, | |
97 | struct TCP_Server_Info *server) | |
98 | { | |
0c51cc6f SP |
99 | int chan_index = cifs_ses_get_chan_index(ses, server); |
100 | ||
101 | if (chan_index == CIFS_INVAL_CHAN_INDEX) | |
102 | return; | |
5752bf64 SP |
103 | |
104 | ses->chans[chan_index].in_reconnect = true; | |
105 | } | |
106 | ||
107 | void | |
108 | cifs_chan_clear_in_reconnect(struct cifs_ses *ses, | |
109 | struct TCP_Server_Info *server) | |
110 | { | |
111 | unsigned int chan_index = cifs_ses_get_chan_index(ses, server); | |
f72d9650 | 112 | |
0c51cc6f SP |
113 | if (chan_index == CIFS_INVAL_CHAN_INDEX) |
114 | return; | |
5752bf64 SP |
115 | |
116 | ses->chans[chan_index].in_reconnect = false; | |
117 | } | |
118 | ||
119 | bool | |
120 | cifs_chan_in_reconnect(struct cifs_ses *ses, | |
121 | struct TCP_Server_Info *server) | |
122 | { | |
123 | unsigned int chan_index = cifs_ses_get_chan_index(ses, server); | |
f72d9650 | 124 | |
0c51cc6f SP |
125 | if (chan_index == CIFS_INVAL_CHAN_INDEX) |
126 | return true; /* err on the safer side */ | |
5752bf64 SP |
127 | |
128 | return CIFS_CHAN_IN_RECONNECT(ses, chan_index); | |
129 | } | |
130 | ||
d1a931ce SP |
131 | void |
132 | cifs_chan_set_need_reconnect(struct cifs_ses *ses, | |
133 | struct TCP_Server_Info *server) | |
134 | { | |
135 | unsigned int chan_index = cifs_ses_get_chan_index(ses, server); | |
f72d9650 | 136 | |
0c51cc6f SP |
137 | if (chan_index == CIFS_INVAL_CHAN_INDEX) |
138 | return; | |
d1a931ce SP |
139 | |
140 | set_bit(chan_index, &ses->chans_need_reconnect); | |
141 | cifs_dbg(FYI, "Set reconnect bitmask for chan %u; now 0x%lx\n", | |
142 | chan_index, ses->chans_need_reconnect); | |
143 | } | |
144 | ||
145 | void | |
146 | cifs_chan_clear_need_reconnect(struct cifs_ses *ses, | |
147 | struct TCP_Server_Info *server) | |
148 | { | |
149 | unsigned int chan_index = cifs_ses_get_chan_index(ses, server); | |
f72d9650 | 150 | |
0c51cc6f SP |
151 | if (chan_index == CIFS_INVAL_CHAN_INDEX) |
152 | return; | |
d1a931ce SP |
153 | |
154 | clear_bit(chan_index, &ses->chans_need_reconnect); | |
155 | cifs_dbg(FYI, "Cleared reconnect bitmask for chan %u; now 0x%lx\n", | |
156 | chan_index, ses->chans_need_reconnect); | |
157 | } | |
158 | ||
159 | bool | |
160 | cifs_chan_needs_reconnect(struct cifs_ses *ses, | |
161 | struct TCP_Server_Info *server) | |
162 | { | |
163 | unsigned int chan_index = cifs_ses_get_chan_index(ses, server); | |
f72d9650 | 164 | |
0c51cc6f SP |
165 | if (chan_index == CIFS_INVAL_CHAN_INDEX) |
166 | return true; /* err on the safer side */ | |
d1a931ce SP |
167 | |
168 | return CIFS_CHAN_NEEDS_RECONNECT(ses, chan_index); | |
169 | } | |
170 | ||
b54034a7 SP |
171 | bool |
172 | cifs_chan_is_iface_active(struct cifs_ses *ses, | |
173 | struct TCP_Server_Info *server) | |
174 | { | |
175 | unsigned int chan_index = cifs_ses_get_chan_index(ses, server); | |
f72d9650 | 176 | |
0c51cc6f SP |
177 | if (chan_index == CIFS_INVAL_CHAN_INDEX) |
178 | return true; /* err on the safer side */ | |
b54034a7 SP |
179 | |
180 | return ses->chans[chan_index].iface && | |
181 | ses->chans[chan_index].iface->is_active; | |
182 | } | |
183 | ||
d70e9fa5 | 184 | /* returns number of channels added */ |
9599d59e | 185 | int cifs_try_adding_channels(struct cifs_ses *ses) |
d70e9fa5 | 186 | { |
90c49fce | 187 | struct TCP_Server_Info *server = ses->server; |
724244cd SP |
188 | int old_chan_count, new_chan_count; |
189 | int left; | |
d70e9fa5 | 190 | int rc = 0; |
65a37a34 | 191 | int tries = 0; |
a6d8fb54 | 192 | size_t iface_weight = 0, iface_min_speed = 0; |
aa45dadd | 193 | struct cifs_server_iface *iface = NULL, *niface = NULL; |
a6d8fb54 | 194 | struct cifs_server_iface *last_iface = NULL; |
d70e9fa5 | 195 | |
724244cd SP |
196 | spin_lock(&ses->chan_lock); |
197 | ||
198 | new_chan_count = old_chan_count = ses->chan_count; | |
199 | left = ses->chan_max - ses->chan_count; | |
200 | ||
d70e9fa5 | 201 | if (left <= 0) { |
88b024f5 | 202 | spin_unlock(&ses->chan_lock); |
d70e9fa5 AA |
203 | cifs_dbg(FYI, |
204 | "ses already at max_channels (%zu), nothing to open\n", | |
205 | ses->chan_max); | |
d70e9fa5 AA |
206 | return 0; |
207 | } | |
208 | ||
90c49fce | 209 | if (server->dialect < SMB30_PROT_ID) { |
53923e0f SF |
210 | spin_unlock(&ses->chan_lock); |
211 | cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n"); | |
212 | return 0; | |
213 | } | |
214 | ||
90c49fce | 215 | if (!(server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) { |
724244cd | 216 | spin_unlock(&ses->chan_lock); |
90c49fce | 217 | cifs_server_dbg(VFS, "no multichannel support\n"); |
9c2dc11d SF |
218 | return 0; |
219 | } | |
724244cd | 220 | spin_unlock(&ses->chan_lock); |
9c2dc11d | 221 | |
65a37a34 | 222 | while (left > 0) { |
d70e9fa5 | 223 | |
65a37a34 AA |
224 | tries++; |
225 | if (tries > 3*ses->chan_max) { | |
a6d8fb54 | 226 | cifs_dbg(VFS, "too many channel open attempts (%d channels left to open)\n", |
65a37a34 AA |
227 | left); |
228 | break; | |
229 | } | |
230 | ||
aa45dadd SP |
231 | spin_lock(&ses->iface_lock); |
232 | if (!ses->iface_count) { | |
233 | spin_unlock(&ses->iface_lock); | |
a6d8fb54 SP |
234 | cifs_dbg(VFS, "server %s does not advertise interfaces\n", |
235 | ses->server->hostname); | |
aa45dadd | 236 | break; |
65a37a34 | 237 | } |
d70e9fa5 | 238 | |
a6d8fb54 SP |
239 | if (!iface) |
240 | iface = list_first_entry(&ses->iface_list, struct cifs_server_iface, | |
241 | iface_head); | |
242 | last_iface = list_last_entry(&ses->iface_list, struct cifs_server_iface, | |
243 | iface_head); | |
244 | iface_min_speed = last_iface->speed; | |
245 | ||
aa45dadd SP |
246 | list_for_each_entry_safe_from(iface, niface, &ses->iface_list, |
247 | iface_head) { | |
a6d8fb54 SP |
248 | /* do not mix rdma and non-rdma interfaces */ |
249 | if (iface->rdma_capable != ses->server->rdma) | |
250 | continue; | |
251 | ||
aa45dadd SP |
252 | /* skip ifaces that are unusable */ |
253 | if (!iface->is_active || | |
254 | (is_ses_using_iface(ses, iface) && | |
a6d8fb54 SP |
255 | !iface->rss_capable)) |
256 | continue; | |
257 | ||
258 | /* check if we already allocated enough channels */ | |
259 | iface_weight = iface->speed / iface_min_speed; | |
260 | ||
261 | if (iface->weight_fulfilled >= iface_weight) | |
aa45dadd | 262 | continue; |
aa45dadd SP |
263 | |
264 | /* take ref before unlock */ | |
265 | kref_get(&iface->refcount); | |
266 | ||
267 | spin_unlock(&ses->iface_lock); | |
9599d59e | 268 | rc = cifs_ses_add_channel(ses, iface); |
aa45dadd SP |
269 | spin_lock(&ses->iface_lock); |
270 | ||
271 | if (rc) { | |
272 | cifs_dbg(VFS, "failed to open extra channel on iface:%pIS rc=%d\n", | |
273 | &iface->sockaddr, | |
274 | rc); | |
275 | kref_put(&iface->refcount, release_iface); | |
6aac002b SP |
276 | /* failure to add chan should increase weight */ |
277 | iface->weight_fulfilled++; | |
aa45dadd SP |
278 | continue; |
279 | } | |
280 | ||
a6d8fb54 SP |
281 | iface->num_channels++; |
282 | iface->weight_fulfilled++; | |
283 | cifs_dbg(VFS, "successfully opened new channel on iface:%pIS\n", | |
aa45dadd SP |
284 | &iface->sockaddr); |
285 | break; | |
d70e9fa5 | 286 | } |
a6d8fb54 SP |
287 | |
288 | /* reached end of list. reset weight_fulfilled and start over */ | |
289 | if (list_entry_is_head(iface, &ses->iface_list, iface_head)) { | |
290 | list_for_each_entry(iface, &ses->iface_list, iface_head) | |
291 | iface->weight_fulfilled = 0; | |
292 | spin_unlock(&ses->iface_lock); | |
293 | iface = NULL; | |
294 | continue; | |
295 | } | |
aa45dadd | 296 | spin_unlock(&ses->iface_lock); |
d70e9fa5 | 297 | |
d70e9fa5 | 298 | left--; |
724244cd | 299 | new_chan_count++; |
d70e9fa5 AA |
300 | } |
301 | ||
724244cd | 302 | return new_chan_count - old_chan_count; |
d70e9fa5 AA |
303 | } |
304 | ||
ee1d2179 SP |
305 | /* |
306 | * called when multichannel is disabled by the server. | |
307 | * this always gets called from smb2_reconnect | |
308 | * and cannot get called in parallel threads. | |
309 | */ | |
310 | void | |
311 | cifs_disable_secondary_channels(struct cifs_ses *ses) | |
312 | { | |
313 | int i, chan_count; | |
314 | struct TCP_Server_Info *server; | |
315 | struct cifs_server_iface *iface; | |
316 | ||
317 | spin_lock(&ses->chan_lock); | |
318 | chan_count = ses->chan_count; | |
319 | if (chan_count == 1) | |
320 | goto done; | |
321 | ||
322 | ses->chan_count = 1; | |
323 | ||
324 | /* for all secondary channels reset the need reconnect bit */ | |
325 | ses->chans_need_reconnect &= 1; | |
326 | ||
327 | for (i = 1; i < chan_count; i++) { | |
328 | iface = ses->chans[i].iface; | |
329 | server = ses->chans[i].server; | |
330 | ||
5eef12c4 SP |
331 | /* |
332 | * remove these references first, since we need to unlock | |
333 | * the chan_lock here, since iface_lock is a higher lock | |
334 | */ | |
335 | ses->chans[i].iface = NULL; | |
336 | ses->chans[i].server = NULL; | |
337 | spin_unlock(&ses->chan_lock); | |
338 | ||
ee1d2179 SP |
339 | if (iface) { |
340 | spin_lock(&ses->iface_lock); | |
ee1d2179 SP |
341 | iface->num_channels--; |
342 | if (iface->weight_fulfilled) | |
343 | iface->weight_fulfilled--; | |
a15ccef8 | 344 | kref_put(&iface->refcount, release_iface); |
ee1d2179 SP |
345 | spin_unlock(&ses->iface_lock); |
346 | } | |
347 | ||
ee1d2179 | 348 | if (server) { |
5eef12c4 SP |
349 | if (!server->terminate) { |
350 | server->terminate = true; | |
351 | cifs_signal_cifsd_for_reconnect(server, false); | |
352 | } | |
ee1d2179 SP |
353 | cifs_put_tcp_session(server, false); |
354 | } | |
355 | ||
5eef12c4 | 356 | spin_lock(&ses->chan_lock); |
ee1d2179 SP |
357 | } |
358 | ||
359 | done: | |
360 | spin_unlock(&ses->chan_lock); | |
361 | } | |
362 | ||
b54034a7 SP |
363 | /* |
364 | * update the iface for the channel if necessary. | |
b54034a7 SP |
365 | * Must be called with chan_lock held. |
366 | */ | |
8d606c31 | 367 | void |
b54034a7 SP |
368 | cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) |
369 | { | |
8da33fd1 | 370 | unsigned int chan_index; |
a6d8fb54 | 371 | size_t iface_weight = 0, iface_min_speed = 0; |
b54034a7 SP |
372 | struct cifs_server_iface *iface = NULL; |
373 | struct cifs_server_iface *old_iface = NULL; | |
a6d8fb54 | 374 | struct cifs_server_iface *last_iface = NULL; |
fa1d0508 | 375 | struct sockaddr_storage ss; |
b54034a7 | 376 | |
8da33fd1 SP |
377 | spin_lock(&ses->chan_lock); |
378 | chan_index = cifs_ses_get_chan_index(ses, server); | |
0c51cc6f | 379 | if (chan_index == CIFS_INVAL_CHAN_INDEX) { |
8da33fd1 | 380 | spin_unlock(&ses->chan_lock); |
8d606c31 | 381 | return; |
8da33fd1 | 382 | } |
b54034a7 SP |
383 | |
384 | if (ses->chans[chan_index].iface) { | |
385 | old_iface = ses->chans[chan_index].iface; | |
8da33fd1 SP |
386 | if (old_iface->is_active) { |
387 | spin_unlock(&ses->chan_lock); | |
8d606c31 | 388 | return; |
8da33fd1 | 389 | } |
b54034a7 | 390 | } |
8da33fd1 | 391 | spin_unlock(&ses->chan_lock); |
b54034a7 | 392 | |
fa1d0508 SP |
393 | spin_lock(&server->srv_lock); |
394 | ss = server->dstaddr; | |
395 | spin_unlock(&server->srv_lock); | |
396 | ||
b54034a7 | 397 | spin_lock(&ses->iface_lock); |
a6d8fb54 SP |
398 | if (!ses->iface_count) { |
399 | spin_unlock(&ses->iface_lock); | |
400 | cifs_dbg(VFS, "server %s does not advertise interfaces\n", ses->server->hostname); | |
8d606c31 | 401 | return; |
a6d8fb54 SP |
402 | } |
403 | ||
404 | last_iface = list_last_entry(&ses->iface_list, struct cifs_server_iface, | |
405 | iface_head); | |
406 | iface_min_speed = last_iface->speed; | |
407 | ||
b54034a7 SP |
408 | /* then look for a new one */ |
409 | list_for_each_entry(iface, &ses->iface_list, iface_head) { | |
fa1d0508 SP |
410 | if (!chan_index) { |
411 | /* if we're trying to get the updated iface for primary channel */ | |
412 | if (!cifs_match_ipaddr((struct sockaddr *) &ss, | |
413 | (struct sockaddr *) &iface->sockaddr)) | |
414 | continue; | |
415 | ||
416 | kref_get(&iface->refcount); | |
417 | break; | |
418 | } | |
419 | ||
a6d8fb54 SP |
420 | /* do not mix rdma and non-rdma interfaces */ |
421 | if (iface->rdma_capable != server->rdma) | |
422 | continue; | |
423 | ||
b54034a7 SP |
424 | if (!iface->is_active || |
425 | (is_ses_using_iface(ses, iface) && | |
426 | !iface->rss_capable)) { | |
427 | continue; | |
428 | } | |
a6d8fb54 SP |
429 | |
430 | /* check if we already allocated enough channels */ | |
431 | iface_weight = iface->speed / iface_min_speed; | |
432 | ||
433 | if (iface->weight_fulfilled >= iface_weight) | |
434 | continue; | |
435 | ||
b54034a7 | 436 | kref_get(&iface->refcount); |
7246210e | 437 | break; |
b54034a7 SP |
438 | } |
439 | ||
7246210e | 440 | if (list_entry_is_head(iface, &ses->iface_list, iface_head)) { |
b54034a7 SP |
441 | iface = NULL; |
442 | cifs_dbg(FYI, "unable to find a suitable iface\n"); | |
443 | } | |
444 | ||
12d1e301 | 445 | if (!iface) { |
516eea97 SP |
446 | if (!chan_index) |
447 | cifs_dbg(FYI, "unable to get the interface matching: %pIS\n", | |
448 | &ss); | |
449 | else { | |
450 | cifs_dbg(FYI, "unable to find another interface to replace: %pIS\n", | |
451 | &old_iface->sockaddr); | |
452 | } | |
453 | ||
fa1d0508 | 454 | spin_unlock(&ses->iface_lock); |
8d606c31 | 455 | return; |
fa1d0508 SP |
456 | } |
457 | ||
b54034a7 | 458 | /* now drop the ref to the current iface */ |
12d1e301 | 459 | if (old_iface) { |
b54034a7 SP |
460 | cifs_dbg(FYI, "replacing iface: %pIS with %pIS\n", |
461 | &old_iface->sockaddr, | |
462 | &iface->sockaddr); | |
a6d8fb54 SP |
463 | |
464 | old_iface->num_channels--; | |
465 | if (old_iface->weight_fulfilled) | |
466 | old_iface->weight_fulfilled--; | |
467 | iface->num_channels++; | |
468 | iface->weight_fulfilled++; | |
469 | ||
b54034a7 | 470 | kref_put(&old_iface->refcount, release_iface); |
fa1d0508 SP |
471 | } else if (!chan_index) { |
472 | /* special case: update interface for primary channel */ | |
c3a11c0e DC |
473 | cifs_dbg(FYI, "referencing primary channel iface: %pIS\n", |
474 | &iface->sockaddr); | |
475 | iface->num_channels++; | |
476 | iface->weight_fulfilled++; | |
b54034a7 | 477 | } |
b54034a7 SP |
478 | spin_unlock(&ses->iface_lock); |
479 | ||
c3a11c0e DC |
480 | spin_lock(&ses->chan_lock); |
481 | chan_index = cifs_ses_get_chan_index(ses, server); | |
482 | if (chan_index == CIFS_INVAL_CHAN_INDEX) { | |
0c51cc6f | 483 | spin_unlock(&ses->chan_lock); |
8d606c31 | 484 | return; |
0c51cc6f SP |
485 | } |
486 | ||
c3a11c0e DC |
487 | ses->chans[chan_index].iface = iface; |
488 | spin_unlock(&ses->chan_lock); | |
b54034a7 SP |
489 | } |
490 | ||
2f589679 AA |
491 | /* |
492 | * If server is a channel of ses, return the corresponding enclosing | |
493 | * cifs_chan otherwise return NULL. | |
494 | */ | |
495 | struct cifs_chan * | |
496 | cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server) | |
497 | { | |
498 | int i; | |
499 | ||
724244cd | 500 | spin_lock(&ses->chan_lock); |
2f589679 | 501 | for (i = 0; i < ses->chan_count; i++) { |
724244cd SP |
502 | if (ses->chans[i].server == server) { |
503 | spin_unlock(&ses->chan_lock); | |
2f589679 | 504 | return &ses->chans[i]; |
724244cd | 505 | } |
2f589679 | 506 | } |
724244cd | 507 | spin_unlock(&ses->chan_lock); |
2f589679 AA |
508 | return NULL; |
509 | } | |
510 | ||
387ec58f | 511 | static int |
9599d59e | 512 | cifs_ses_add_channel(struct cifs_ses *ses, |
387ec58f | 513 | struct cifs_server_iface *iface) |
d70e9fa5 | 514 | { |
724244cd | 515 | struct TCP_Server_Info *chan_server; |
d70e9fa5 | 516 | struct cifs_chan *chan; |
69a4e06c | 517 | struct smb3_fs_context *ctx; |
d70e9fa5 | 518 | static const char unc_fmt[] = "\\%s\\foo"; |
d70e9fa5 AA |
519 | struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; |
520 | struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; | |
69a4e06c | 521 | size_t len; |
d70e9fa5 AA |
522 | int rc; |
523 | unsigned int xid = get_xid(); | |
524 | ||
d70e9fa5 | 525 | if (iface->sockaddr.ss_family == AF_INET) |
a0a3036b JP |
526 | cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI4)\n", |
527 | ses, iface->speed, iface->rdma_capable ? "yes" : "no", | |
528 | &ipv4->sin_addr); | |
d70e9fa5 | 529 | else |
5e538959 | 530 | cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI6)\n", |
a0a3036b JP |
531 | ses, iface->speed, iface->rdma_capable ? "yes" : "no", |
532 | &ipv6->sin6_addr); | |
d70e9fa5 AA |
533 | |
534 | /* | |
3fa1c6d1 | 535 | * Setup a ctx with mostly the same info as the existing |
d70e9fa5 AA |
536 | * session and overwrite it with the requested iface data. |
537 | * | |
538 | * We need to setup at least the fields used for negprot and | |
539 | * sesssetup. | |
540 | * | |
24e0a1ef | 541 | * We only need the ctx here, so we can reuse memory from |
d70e9fa5 AA |
542 | * the session and server without caring about memory |
543 | * management. | |
544 | */ | |
69a4e06c PA |
545 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
546 | if (!ctx) { | |
547 | rc = -ENOMEM; | |
548 | goto out_free_xid; | |
549 | } | |
d70e9fa5 AA |
550 | |
551 | /* Always make new connection for now (TODO?) */ | |
69a4e06c | 552 | ctx->nosharesock = true; |
d70e9fa5 AA |
553 | |
554 | /* Auth */ | |
69a4e06c PA |
555 | ctx->domainauto = ses->domainAuto; |
556 | ctx->domainname = ses->domainName; | |
4c14d704 SP |
557 | |
558 | /* no hostname for extra channels */ | |
69a4e06c | 559 | ctx->server_hostname = ""; |
4c14d704 | 560 | |
69a4e06c PA |
561 | ctx->username = ses->user_name; |
562 | ctx->password = ses->password; | |
563 | ctx->sectype = ses->sectype; | |
564 | ctx->sign = ses->sign; | |
d70e9fa5 AA |
565 | |
566 | /* UNC and paths */ | |
567 | /* XXX: Use ses->server->hostname? */ | |
69a4e06c PA |
568 | len = sizeof(unc_fmt) + SERVER_NAME_LEN_WITH_NULL; |
569 | ctx->UNC = kzalloc(len, GFP_KERNEL); | |
570 | if (!ctx->UNC) { | |
571 | rc = -ENOMEM; | |
572 | goto out_free_ctx; | |
573 | } | |
574 | scnprintf(ctx->UNC, len, unc_fmt, ses->ip_addr); | |
575 | ctx->prepath = ""; | |
d70e9fa5 | 576 | |
bbbf9eaf | 577 | /* Reuse same version as master connection */ |
69a4e06c PA |
578 | ctx->vals = ses->server->vals; |
579 | ctx->ops = ses->server->ops; | |
d70e9fa5 | 580 | |
69a4e06c PA |
581 | ctx->noblocksnd = ses->server->noblocksnd; |
582 | ctx->noautotune = ses->server->noautotune; | |
583 | ctx->sockopt_tcp_nodelay = ses->server->tcp_nodelay; | |
584 | ctx->echo_interval = ses->server->echo_interval / HZ; | |
585 | ctx->max_credits = ses->server->max_credits; | |
d70e9fa5 AA |
586 | |
587 | /* | |
588 | * This will be used for encoding/decoding user/domain/pw | |
589 | * during sess setup auth. | |
d70e9fa5 | 590 | */ |
9599d59e | 591 | ctx->local_nls = ses->local_nls; |
d70e9fa5 AA |
592 | |
593 | /* Use RDMA if possible */ | |
69a4e06c PA |
594 | ctx->rdma = iface->rdma_capable; |
595 | memcpy(&ctx->dstaddr, &iface->sockaddr, sizeof(ctx->dstaddr)); | |
d70e9fa5 AA |
596 | |
597 | /* reuse master con client guid */ | |
69a4e06c PA |
598 | memcpy(&ctx->client_guid, ses->server->client_guid, |
599 | sizeof(ctx->client_guid)); | |
600 | ctx->use_client_guid = true; | |
d70e9fa5 | 601 | |
69a4e06c | 602 | chan_server = cifs_get_tcp_session(ctx, ses->server); |
d70e9fa5 | 603 | |
724244cd | 604 | spin_lock(&ses->chan_lock); |
f486ef8e | 605 | chan = &ses->chans[ses->chan_count]; |
724244cd | 606 | chan->server = chan_server; |
d70e9fa5 AA |
607 | if (IS_ERR(chan->server)) { |
608 | rc = PTR_ERR(chan->server); | |
609 | chan->server = NULL; | |
724244cd | 610 | spin_unlock(&ses->chan_lock); |
d70e9fa5 AA |
611 | goto out; |
612 | } | |
aa45dadd | 613 | chan->iface = iface; |
f486ef8e SP |
614 | ses->chan_count++; |
615 | atomic_set(&ses->chan_seq, 0); | |
616 | ||
617 | /* Mark this channel as needing connect/setup */ | |
618 | cifs_chan_set_need_reconnect(ses, chan->server); | |
619 | ||
724244cd SP |
620 | spin_unlock(&ses->chan_lock); |
621 | ||
73f9bfbe | 622 | mutex_lock(&ses->session_mutex); |
d70e9fa5 AA |
623 | /* |
624 | * We need to allocate the server crypto now as we will need | |
625 | * to sign packets before we generate the channel signing key | |
626 | * (we sign with the session key) | |
627 | */ | |
628 | rc = smb311_crypto_shash_allocate(chan->server); | |
629 | if (rc) { | |
630 | cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); | |
73f9bfbe | 631 | mutex_unlock(&ses->session_mutex); |
d70e9fa5 AA |
632 | goto out; |
633 | } | |
634 | ||
f486ef8e SP |
635 | rc = cifs_negotiate_protocol(xid, ses, chan->server); |
636 | if (!rc) | |
9599d59e | 637 | rc = cifs_setup_session(xid, ses, chan->server, ses->local_nls); |
724244cd | 638 | |
73f9bfbe SP |
639 | mutex_unlock(&ses->session_mutex); |
640 | ||
d70e9fa5 | 641 | out: |
d1a931ce | 642 | if (rc && chan->server) { |
ee1d2179 | 643 | cifs_put_tcp_session(chan->server, 0); |
50bd7d5a | 644 | |
f486ef8e | 645 | spin_lock(&ses->chan_lock); |
ee1d2179 | 646 | |
d1a931ce SP |
647 | /* we rely on all bits beyond chan_count to be clear */ |
648 | cifs_chan_clear_need_reconnect(ses, chan->server); | |
649 | ses->chan_count--; | |
2e0fa298 SP |
650 | /* |
651 | * chan_count should never reach 0 as at least the primary | |
652 | * channel is always allocated | |
653 | */ | |
654 | WARN_ON(ses->chan_count < 1); | |
f486ef8e | 655 | spin_unlock(&ses->chan_lock); |
50bd7d5a | 656 | } |
d70e9fa5 | 657 | |
69a4e06c PA |
658 | kfree(ctx->UNC); |
659 | out_free_ctx: | |
660 | kfree(ctx); | |
661 | out_free_xid: | |
e909d054 | 662 | free_xid(xid); |
d70e9fa5 AA |
663 | return rc; |
664 | } | |
3979877e | 665 | |
fb157ed2 | 666 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
f486ef8e SP |
667 | static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, |
668 | struct TCP_Server_Info *server, | |
669 | SESSION_SETUP_ANDX *pSMB) | |
3979877e SF |
670 | { |
671 | __u32 capabilities = 0; | |
672 | ||
673 | /* init fields common to all four types of SessSetup */ | |
eca6acf9 SF |
674 | /* Note that offsets for first seven fields in req struct are same */ |
675 | /* in CIFS Specs so does not matter which of 3 forms of struct */ | |
676 | /* that we use in next few lines */ | |
677 | /* Note that header is initialized to zero in header_assemble */ | |
3979877e | 678 | pSMB->req.AndXCommand = 0xFF; |
c974befa JL |
679 | pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32, |
680 | CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4, | |
681 | USHRT_MAX)); | |
f486ef8e | 682 | pSMB->req.MaxMpxCount = cpu_to_le16(server->maxReq); |
bc09d141 | 683 | pSMB->req.VcNumber = cpu_to_le16(1); |
3979877e SF |
684 | |
685 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
686 | ||
f72d9650 | 687 | /* BB verify whether signing required on neg or just auth frame (and NTLM case) */ |
3979877e SF |
688 | |
689 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
690 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
691 | ||
f486ef8e | 692 | if (server->sign) |
3979877e SF |
693 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
694 | ||
695 | if (ses->capabilities & CAP_UNICODE) { | |
696 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
697 | capabilities |= CAP_UNICODE; | |
698 | } | |
699 | if (ses->capabilities & CAP_STATUS32) { | |
700 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
701 | capabilities |= CAP_STATUS32; | |
702 | } | |
703 | if (ses->capabilities & CAP_DFS) { | |
704 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
705 | capabilities |= CAP_DFS; | |
706 | } | |
26f57364 | 707 | if (ses->capabilities & CAP_UNIX) |
3979877e | 708 | capabilities |= CAP_UNIX; |
3979877e | 709 | |
3979877e SF |
710 | return capabilities; |
711 | } | |
712 | ||
0d3a01fa JL |
713 | static void |
714 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
715 | { | |
716 | char *bcc_ptr = *pbcc_area; | |
717 | int bytes_ret = 0; | |
718 | ||
719 | /* Copy OS version */ | |
acbbb76a SF |
720 | bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32, |
721 | nls_cp); | |
0d3a01fa | 722 | bcc_ptr += 2 * bytes_ret; |
acbbb76a SF |
723 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release, |
724 | 32, nls_cp); | |
0d3a01fa JL |
725 | bcc_ptr += 2 * bytes_ret; |
726 | bcc_ptr += 2; /* trailing null */ | |
727 | ||
acbbb76a SF |
728 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, |
729 | 32, nls_cp); | |
0d3a01fa JL |
730 | bcc_ptr += 2 * bytes_ret; |
731 | bcc_ptr += 2; /* trailing null */ | |
732 | ||
733 | *pbcc_area = bcc_ptr; | |
734 | } | |
735 | ||
96daf2b0 | 736 | static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses, |
0d3a01fa JL |
737 | const struct nls_table *nls_cp) |
738 | { | |
739 | char *bcc_ptr = *pbcc_area; | |
740 | int bytes_ret = 0; | |
741 | ||
742 | /* copy domain */ | |
743 | if (ses->domainName == NULL) { | |
f72d9650 SF |
744 | /* |
745 | * Sending null domain better than using a bogus domain name (as | |
746 | * we did briefly in 2.6.18) since server will use its default | |
747 | */ | |
0d3a01fa JL |
748 | *bcc_ptr = 0; |
749 | *(bcc_ptr+1) = 0; | |
750 | bytes_ret = 0; | |
751 | } else | |
acbbb76a | 752 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName, |
057d6332 | 753 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0d3a01fa JL |
754 | bcc_ptr += 2 * bytes_ret; |
755 | bcc_ptr += 2; /* account for null terminator */ | |
756 | ||
757 | *pbcc_area = bcc_ptr; | |
758 | } | |
759 | ||
96daf2b0 | 760 | static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 761 | const struct nls_table *nls_cp) |
3979877e | 762 | { |
790fe579 | 763 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
764 | int bytes_ret = 0; |
765 | ||
f72d9650 | 766 | /* BB FIXME add check that strings less than 335 or will need to send as arrays */ |
3979877e | 767 | |
3979877e | 768 | /* copy user */ |
8727c8a8 | 769 | if (ses->user_name == NULL) { |
6e659c63 SF |
770 | /* null user mount */ |
771 | *bcc_ptr = 0; | |
772 | *(bcc_ptr+1) = 0; | |
301a6a31 | 773 | } else { |
acbbb76a | 774 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name, |
8c3a2b4c | 775 | CIFS_MAX_USERNAME_LEN, nls_cp); |
3979877e SF |
776 | } |
777 | bcc_ptr += 2 * bytes_ret; | |
778 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 779 | |
0d3a01fa JL |
780 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
781 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
782 | |
783 | *pbcc_area = bcc_ptr; | |
784 | } | |
785 | ||
96daf2b0 | 786 | static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 787 | const struct nls_table *nls_cp) |
3979877e | 788 | { |
790fe579 | 789 | char *bcc_ptr = *pbcc_area; |
340625e6 | 790 | int len; |
3979877e SF |
791 | |
792 | /* copy user */ | |
793 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 | 794 | /* copy user */ |
de47a417 | 795 | if (ses->user_name != NULL) { |
340625e6 RS |
796 | len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); |
797 | if (WARN_ON_ONCE(len < 0)) | |
798 | len = CIFS_MAX_USERNAME_LEN - 1; | |
799 | bcc_ptr += len; | |
de47a417 | 800 | } |
8727c8a8 | 801 | /* else null user mount */ |
3979877e | 802 | *bcc_ptr = 0; |
790fe579 | 803 | bcc_ptr++; /* account for null termination */ |
3979877e | 804 | |
790fe579 | 805 | /* copy domain */ |
790fe579 | 806 | if (ses->domainName != NULL) { |
340625e6 RS |
807 | len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); |
808 | if (WARN_ON_ONCE(len < 0)) | |
809 | len = CIFS_MAX_DOMAINNAME_LEN - 1; | |
810 | bcc_ptr += len; | |
1bc081b6 | 811 | } /* else we send a null domain name so server will default to its own domain */ |
3979877e SF |
812 | *bcc_ptr = 0; |
813 | bcc_ptr++; | |
814 | ||
815 | /* BB check for overflow here */ | |
816 | ||
817 | strcpy(bcc_ptr, "Linux version "); | |
818 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
819 | strcpy(bcc_ptr, init_utsname()->release); |
820 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
821 | |
822 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
823 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
824 | ||
790fe579 | 825 | *pbcc_area = bcc_ptr; |
3979877e SF |
826 | } |
827 | ||
59140797 | 828 | static void |
96daf2b0 | 829 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses, |
59140797 | 830 | const struct nls_table *nls_cp) |
3979877e | 831 | { |
59140797 | 832 | int len; |
790fe579 | 833 | char *data = *pbcc_area; |
3979877e | 834 | |
f96637be | 835 | cifs_dbg(FYI, "bleft %d\n", bleft); |
3979877e | 836 | |
26f57364 | 837 | kfree(ses->serverOS); |
acbbb76a | 838 | ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 839 | cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS); |
59140797 JL |
840 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
841 | data += len; | |
842 | bleft -= len; | |
843 | if (bleft <= 0) | |
844 | return; | |
3979877e | 845 | |
26f57364 | 846 | kfree(ses->serverNOS); |
acbbb76a | 847 | ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 848 | cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS); |
59140797 JL |
849 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
850 | data += len; | |
851 | bleft -= len; | |
852 | if (bleft <= 0) | |
853 | return; | |
790fe579 | 854 | |
26f57364 | 855 | kfree(ses->serverDomain); |
acbbb76a | 856 | ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 857 | cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain); |
790fe579 | 858 | |
59140797 | 859 | return; |
3979877e SF |
860 | } |
861 | ||
7d066459 JL |
862 | static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, |
863 | struct cifs_ses *ses, | |
864 | const struct nls_table *nls_cp) | |
3979877e | 865 | { |
3979877e | 866 | int len; |
790fe579 | 867 | char *bcc_ptr = *pbcc_area; |
3979877e | 868 | |
f96637be | 869 | cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft); |
50c2f753 | 870 | |
3979877e | 871 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 872 | if (len >= bleft) |
7d066459 | 873 | return; |
50c2f753 | 874 | |
26f57364 | 875 | kfree(ses->serverOS); |
3979877e | 876 | |
340625e6 | 877 | ses->serverOS = kmalloc(len + 1, GFP_KERNEL); |
27b7edcf | 878 | if (ses->serverOS) { |
340625e6 RS |
879 | memcpy(ses->serverOS, bcc_ptr, len); |
880 | ses->serverOS[len] = 0; | |
27b7edcf NJ |
881 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) |
882 | cifs_dbg(FYI, "OS/2 server\n"); | |
883 | } | |
3979877e SF |
884 | |
885 | bcc_ptr += len + 1; | |
886 | bleft -= len + 1; | |
887 | ||
888 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 889 | if (len >= bleft) |
7d066459 | 890 | return; |
3979877e | 891 | |
26f57364 | 892 | kfree(ses->serverNOS); |
3979877e | 893 | |
340625e6 RS |
894 | ses->serverNOS = kmalloc(len + 1, GFP_KERNEL); |
895 | if (ses->serverNOS) { | |
896 | memcpy(ses->serverNOS, bcc_ptr, len); | |
897 | ses->serverNOS[len] = 0; | |
898 | } | |
3979877e SF |
899 | |
900 | bcc_ptr += len + 1; | |
901 | bleft -= len + 1; | |
902 | ||
790fe579 SF |
903 | len = strnlen(bcc_ptr, bleft); |
904 | if (len > bleft) | |
7d066459 | 905 | return; |
3979877e | 906 | |
1bc081b6 SF |
907 | /* |
908 | * No domain field in LANMAN case. Domain is | |
909 | * returned by old servers in the SMB negprot response | |
910 | * | |
911 | * BB For newer servers which do not support Unicode, | |
912 | * but thus do return domain here, we could add parsing | |
913 | * for it later, but it is not very important | |
914 | */ | |
f96637be | 915 | cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); |
3979877e | 916 | } |
fb157ed2 | 917 | #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ |
3979877e | 918 | |
5478f9ba | 919 | int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
96daf2b0 | 920 | struct cifs_ses *ses) |
0b3cc858 | 921 | { |
2b149f11 SP |
922 | unsigned int tioffset; /* challenge message target info area */ |
923 | unsigned int tilen; /* challenge message target info area length */ | |
0b3cc858 | 924 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; |
9de0737d | 925 | __u32 server_flags; |
0b3cc858 SF |
926 | |
927 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
f96637be | 928 | cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len); |
0b3cc858 SF |
929 | return -EINVAL; |
930 | } | |
931 | ||
932 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
f96637be JP |
933 | cifs_dbg(VFS, "blob signature incorrect %s\n", |
934 | pblob->Signature); | |
0b3cc858 SF |
935 | return -EINVAL; |
936 | } | |
937 | if (pblob->MessageType != NtLmChallenge) { | |
f96637be JP |
938 | cifs_dbg(VFS, "Incorrect message type %d\n", |
939 | pblob->MessageType); | |
0b3cc858 SF |
940 | return -EINVAL; |
941 | } | |
942 | ||
9de0737d PA |
943 | server_flags = le32_to_cpu(pblob->NegotiateFlags); |
944 | cifs_dbg(FYI, "%s: negotiate=0x%08x challenge=0x%08x\n", __func__, | |
945 | ses->ntlmssp->client_flags, server_flags); | |
946 | ||
947 | if ((ses->ntlmssp->client_flags & (NTLMSSP_NEGOTIATE_SEAL | NTLMSSP_NEGOTIATE_SIGN)) && | |
948 | (!(server_flags & NTLMSSP_NEGOTIATE_56) && !(server_flags & NTLMSSP_NEGOTIATE_128))) { | |
949 | cifs_dbg(VFS, "%s: requested signing/encryption but server did not return either 56-bit or 128-bit session key size\n", | |
950 | __func__); | |
951 | return -EINVAL; | |
952 | } | |
953 | if (!(server_flags & NTLMSSP_NEGOTIATE_NTLM) && !(server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) { | |
954 | cifs_dbg(VFS, "%s: server does not seem to support either NTLMv1 or NTLMv2\n", __func__); | |
955 | return -EINVAL; | |
956 | } | |
957 | if (ses->server->sign && !(server_flags & NTLMSSP_NEGOTIATE_SIGN)) { | |
958 | cifs_dbg(VFS, "%s: forced packet signing but server does not seem to support it\n", | |
959 | __func__); | |
960 | return -EOPNOTSUPP; | |
961 | } | |
962 | if ((ses->ntlmssp->client_flags & NTLMSSP_NEGOTIATE_KEY_XCH) && | |
963 | !(server_flags & NTLMSSP_NEGOTIATE_KEY_XCH)) | |
964 | pr_warn_once("%s: authentication has been weakened as server does not support key exchange\n", | |
965 | __func__); | |
966 | ||
967 | ses->ntlmssp->server_flags = server_flags; | |
968 | ||
d3686d54 | 969 | memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
1bc081b6 SF |
970 | /* |
971 | * In particular we can examine sign flags | |
972 | * | |
973 | * BB spec says that if AvId field of MsvAvTimestamp is populated then | |
974 | * we must set the MIC field of the AUTHENTICATE_MESSAGE | |
975 | */ | |
9de0737d | 976 | |
5443d130 SF |
977 | tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset); |
978 | tilen = le16_to_cpu(pblob->TargetInfoArray.Length); | |
4991a5fa | 979 | if (tioffset > blob_len || tioffset + tilen > blob_len) { |
a0a3036b JP |
980 | cifs_dbg(VFS, "tioffset + tilen too high %u + %u\n", |
981 | tioffset, tilen); | |
4991a5fa DC |
982 | return -EINVAL; |
983 | } | |
d3686d54 | 984 | if (tilen) { |
2fe58d97 | 985 | kfree_sensitive(ses->auth_key.response); |
f7f7c185 SMP |
986 | ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen, |
987 | GFP_KERNEL); | |
d3686d54 | 988 | if (!ses->auth_key.response) { |
a0a3036b | 989 | cifs_dbg(VFS, "Challenge target info alloc failure\n"); |
2b149f11 SP |
990 | return -ENOMEM; |
991 | } | |
d3686d54 | 992 | ses->auth_key.len = tilen; |
2b149f11 SP |
993 | } |
994 | ||
0b3cc858 SF |
995 | return 0; |
996 | } | |
997 | ||
49bd49f9 SP |
998 | static int size_of_ntlmssp_blob(struct cifs_ses *ses, int base_size) |
999 | { | |
1000 | int sz = base_size + ses->auth_key.len | |
1001 | - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2; | |
1002 | ||
1003 | if (ses->domainName) | |
1004 | sz += sizeof(__le16) * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); | |
1005 | else | |
1006 | sz += sizeof(__le16); | |
1007 | ||
1008 | if (ses->user_name) | |
1009 | sz += sizeof(__le16) * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); | |
1010 | else | |
1011 | sz += sizeof(__le16); | |
1012 | ||
de3a9e94 | 1013 | if (ses->workstation_name[0]) |
d3b331fb | 1014 | sz += sizeof(__le16) * strnlen(ses->workstation_name, |
de3a9e94 | 1015 | ntlmssp_workstation_name_size(ses)); |
d3b331fb RB |
1016 | else |
1017 | sz += sizeof(__le16); | |
49bd49f9 SP |
1018 | |
1019 | return sz; | |
1020 | } | |
1021 | ||
1022 | static inline void cifs_security_buffer_from_str(SECURITY_BUFFER *pbuf, | |
1023 | char *str_value, | |
1024 | int str_length, | |
1025 | unsigned char *pstart, | |
1026 | unsigned char **pcur, | |
1027 | const struct nls_table *nls_cp) | |
1028 | { | |
1029 | unsigned char *tmp = pstart; | |
1030 | int len; | |
1031 | ||
1032 | if (!pbuf) | |
1033 | return; | |
1034 | ||
1035 | if (!pcur) | |
1036 | pcur = &tmp; | |
1037 | ||
1038 | if (!str_value) { | |
1039 | pbuf->BufferOffset = cpu_to_le32(*pcur - pstart); | |
1040 | pbuf->Length = 0; | |
1041 | pbuf->MaximumLength = 0; | |
1042 | *pcur += sizeof(__le16); | |
1043 | } else { | |
1044 | len = cifs_strtoUTF16((__le16 *)*pcur, | |
1045 | str_value, | |
1046 | str_length, | |
1047 | nls_cp); | |
1048 | len *= sizeof(__le16); | |
1049 | pbuf->BufferOffset = cpu_to_le32(*pcur - pstart); | |
1050 | pbuf->Length = cpu_to_le16(len); | |
1051 | pbuf->MaximumLength = cpu_to_le16(len); | |
1052 | *pcur += len; | |
1053 | } | |
1054 | } | |
1055 | ||
0b3cc858 SF |
1056 | /* BB Move to ntlmssp.c eventually */ |
1057 | ||
49bd49f9 SP |
1058 | int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, |
1059 | u16 *buflen, | |
1060 | struct cifs_ses *ses, | |
f486ef8e | 1061 | struct TCP_Server_Info *server, |
49bd49f9 | 1062 | const struct nls_table *nls_cp) |
0b3cc858 | 1063 | { |
49bd49f9 | 1064 | int rc = 0; |
49bd49f9 | 1065 | NEGOTIATE_MESSAGE *sec_blob; |
0b3cc858 | 1066 | __u32 flags; |
49bd49f9 SP |
1067 | unsigned char *tmp; |
1068 | int len; | |
1069 | ||
1070 | len = size_of_ntlmssp_blob(ses, sizeof(NEGOTIATE_MESSAGE)); | |
1071 | *pbuffer = kmalloc(len, GFP_KERNEL); | |
1072 | if (!*pbuffer) { | |
1073 | rc = -ENOMEM; | |
1074 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
1075 | *buflen = 0; | |
1076 | goto setup_ntlm_neg_ret; | |
1077 | } | |
1078 | sec_blob = (NEGOTIATE_MESSAGE *)*pbuffer; | |
0b3cc858 | 1079 | |
49bd49f9 | 1080 | memset(*pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); |
0b3cc858 SF |
1081 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
1082 | sec_blob->MessageType = NtLmNegotiate; | |
1083 | ||
1084 | /* BB is NTLMV2 session security format easier to use here? */ | |
1085 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
1086 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 | 1087 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
9de0737d PA |
1088 | NTLMSSP_NEGOTIATE_ALWAYS_SIGN | NTLMSSP_NEGOTIATE_SEAL | |
1089 | NTLMSSP_NEGOTIATE_SIGN; | |
f6a6bf7c | 1090 | if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
cabfb368 | 1091 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; |
0b3cc858 | 1092 | |
49bd49f9 | 1093 | tmp = *pbuffer + sizeof(NEGOTIATE_MESSAGE); |
9de0737d | 1094 | ses->ntlmssp->client_flags = flags; |
df8fbc24 | 1095 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 | 1096 | |
49bd49f9 SP |
1097 | /* these fields should be null in negotiate phase MS-NLMP 3.1.5.1.1 */ |
1098 | cifs_security_buffer_from_str(&sec_blob->DomainName, | |
1099 | NULL, | |
1100 | CIFS_MAX_DOMAINNAME_LEN, | |
1101 | *pbuffer, &tmp, | |
1102 | nls_cp); | |
0b3cc858 | 1103 | |
49bd49f9 SP |
1104 | cifs_security_buffer_from_str(&sec_blob->WorkstationName, |
1105 | NULL, | |
1106 | CIFS_MAX_WORKSTATION_LEN, | |
1107 | *pbuffer, &tmp, | |
1108 | nls_cp); | |
b8da344b | 1109 | |
49bd49f9 SP |
1110 | *buflen = tmp - *pbuffer; |
1111 | setup_ntlm_neg_ret: | |
1112 | return rc; | |
b8da344b JM |
1113 | } |
1114 | ||
52d00533 SF |
1115 | /* |
1116 | * Build ntlmssp blob with additional fields, such as version, | |
1117 | * supported by modern servers. For safety limit to SMB3 or later | |
1118 | * See notes in MS-NLMP Section 2.2.2.1 e.g. | |
1119 | */ | |
1120 | int build_ntlmssp_smb3_negotiate_blob(unsigned char **pbuffer, | |
1121 | u16 *buflen, | |
1122 | struct cifs_ses *ses, | |
1123 | struct TCP_Server_Info *server, | |
1124 | const struct nls_table *nls_cp) | |
1125 | { | |
1126 | int rc = 0; | |
1127 | struct negotiate_message *sec_blob; | |
1128 | __u32 flags; | |
1129 | unsigned char *tmp; | |
1130 | int len; | |
1131 | ||
1132 | len = size_of_ntlmssp_blob(ses, sizeof(struct negotiate_message)); | |
1133 | *pbuffer = kmalloc(len, GFP_KERNEL); | |
1134 | if (!*pbuffer) { | |
1135 | rc = -ENOMEM; | |
1136 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
1137 | *buflen = 0; | |
1138 | goto setup_ntlm_smb3_neg_ret; | |
1139 | } | |
1140 | sec_blob = (struct negotiate_message *)*pbuffer; | |
1141 | ||
1142 | memset(*pbuffer, 0, sizeof(struct negotiate_message)); | |
1143 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
1144 | sec_blob->MessageType = NtLmNegotiate; | |
1145 | ||
1146 | /* BB is NTLMV2 session security format easier to use here? */ | |
1147 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
1148 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
1149 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | | |
1150 | NTLMSSP_NEGOTIATE_ALWAYS_SIGN | NTLMSSP_NEGOTIATE_SEAL | | |
1151 | NTLMSSP_NEGOTIATE_SIGN | NTLMSSP_NEGOTIATE_VERSION; | |
1152 | if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess) | |
1153 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
1154 | ||
1155 | sec_blob->Version.ProductMajorVersion = LINUX_VERSION_MAJOR; | |
1156 | sec_blob->Version.ProductMinorVersion = LINUX_VERSION_PATCHLEVEL; | |
1157 | sec_blob->Version.ProductBuild = cpu_to_le16(SMB3_PRODUCT_BUILD); | |
1158 | sec_blob->Version.NTLMRevisionCurrent = NTLMSSP_REVISION_W2K3; | |
1159 | ||
1160 | tmp = *pbuffer + sizeof(struct negotiate_message); | |
1161 | ses->ntlmssp->client_flags = flags; | |
1162 | sec_blob->NegotiateFlags = cpu_to_le32(flags); | |
1163 | ||
1164 | /* these fields should be null in negotiate phase MS-NLMP 3.1.5.1.1 */ | |
1165 | cifs_security_buffer_from_str(&sec_blob->DomainName, | |
1166 | NULL, | |
1167 | CIFS_MAX_DOMAINNAME_LEN, | |
1168 | *pbuffer, &tmp, | |
1169 | nls_cp); | |
1170 | ||
1171 | cifs_security_buffer_from_str(&sec_blob->WorkstationName, | |
1172 | NULL, | |
1173 | CIFS_MAX_WORKSTATION_LEN, | |
1174 | *pbuffer, &tmp, | |
1175 | nls_cp); | |
1176 | ||
1177 | *buflen = tmp - *pbuffer; | |
1178 | setup_ntlm_smb3_neg_ret: | |
1179 | return rc; | |
1180 | } | |
1181 | ||
1182 | ||
19826558 | 1183 | /* See MS-NLMP 2.2.1.3 */ |
b8da344b | 1184 | int build_ntlmssp_auth_blob(unsigned char **pbuffer, |
89f150f4 | 1185 | u16 *buflen, |
96daf2b0 | 1186 | struct cifs_ses *ses, |
f486ef8e | 1187 | struct TCP_Server_Info *server, |
2b149f11 | 1188 | const struct nls_table *nls_cp) |
0b3cc858 | 1189 | { |
2b149f11 | 1190 | int rc; |
b8da344b | 1191 | AUTHENTICATE_MESSAGE *sec_blob; |
0b3cc858 SF |
1192 | __u32 flags; |
1193 | unsigned char *tmp; | |
49bd49f9 | 1194 | int len; |
0b3cc858 | 1195 | |
b8da344b JM |
1196 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
1197 | if (rc) { | |
1198 | cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc); | |
1199 | *buflen = 0; | |
1200 | goto setup_ntlmv2_ret; | |
1201 | } | |
49bd49f9 SP |
1202 | |
1203 | len = size_of_ntlmssp_blob(ses, sizeof(AUTHENTICATE_MESSAGE)); | |
1204 | *pbuffer = kmalloc(len, GFP_KERNEL); | |
126c97f4 NMG |
1205 | if (!*pbuffer) { |
1206 | rc = -ENOMEM; | |
1207 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
1208 | *buflen = 0; | |
1209 | goto setup_ntlmv2_ret; | |
1210 | } | |
b8da344b JM |
1211 | sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer; |
1212 | ||
0b3cc858 SF |
1213 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
1214 | sec_blob->MessageType = NtLmAuthenticate; | |
1215 | ||
1460720c | 1216 | /* send version information in ntlmssp authenticate also */ |
9de0737d | 1217 | flags = ses->ntlmssp->server_flags | NTLMSSP_REQUEST_TARGET | |
1460720c MS |
1218 | NTLMSSP_NEGOTIATE_TARGET_INFO | NTLMSSP_NEGOTIATE_VERSION | |
1219 | NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED; | |
1220 | ||
1221 | sec_blob->Version.ProductMajorVersion = LINUX_VERSION_MAJOR; | |
1222 | sec_blob->Version.ProductMinorVersion = LINUX_VERSION_PATCHLEVEL; | |
1223 | sec_blob->Version.ProductBuild = cpu_to_le16(SMB3_PRODUCT_BUILD); | |
1224 | sec_blob->Version.NTLMRevisionCurrent = NTLMSSP_REVISION_W2K3; | |
1225 | ||
b8da344b | 1226 | tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); |
df8fbc24 | 1227 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
1228 | |
1229 | sec_blob->LmChallengeResponse.BufferOffset = | |
1230 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
1231 | sec_blob->LmChallengeResponse.Length = 0; | |
1232 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
1233 | ||
b8da344b JM |
1234 | sec_blob->NtChallengeResponse.BufferOffset = |
1235 | cpu_to_le32(tmp - *pbuffer); | |
cfda35d9 | 1236 | if (ses->user_name != NULL) { |
cfda35d9 SM |
1237 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
1238 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1239 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
1240 | ||
1241 | sec_blob->NtChallengeResponse.Length = | |
1242 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1243 | sec_blob->NtChallengeResponse.MaximumLength = | |
1244 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1245 | } else { | |
1246 | /* | |
1247 | * don't send an NT Response for anonymous access | |
1248 | */ | |
1249 | sec_blob->NtChallengeResponse.Length = 0; | |
1250 | sec_blob->NtChallengeResponse.MaximumLength = 0; | |
2b149f11 | 1251 | } |
0b3cc858 | 1252 | |
49bd49f9 SP |
1253 | cifs_security_buffer_from_str(&sec_blob->DomainName, |
1254 | ses->domainName, | |
1255 | CIFS_MAX_DOMAINNAME_LEN, | |
1256 | *pbuffer, &tmp, | |
1257 | nls_cp); | |
0b3cc858 | 1258 | |
49bd49f9 SP |
1259 | cifs_security_buffer_from_str(&sec_blob->UserName, |
1260 | ses->user_name, | |
1261 | CIFS_MAX_USERNAME_LEN, | |
1262 | *pbuffer, &tmp, | |
1263 | nls_cp); | |
0b3cc858 | 1264 | |
49bd49f9 SP |
1265 | cifs_security_buffer_from_str(&sec_blob->WorkstationName, |
1266 | ses->workstation_name, | |
de3a9e94 | 1267 | ntlmssp_workstation_name_size(ses), |
49bd49f9 SP |
1268 | *pbuffer, &tmp, |
1269 | nls_cp); | |
0b3cc858 | 1270 | |
9de0737d PA |
1271 | if ((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) && |
1272 | (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) && | |
1273 | !calc_seckey(ses)) { | |
d3686d54 | 1274 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
b8da344b | 1275 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
1276 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); |
1277 | sec_blob->SessionKey.MaximumLength = | |
1278 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
1279 | tmp += CIFS_CPHTXT_SIZE; | |
1280 | } else { | |
b8da344b | 1281 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
1282 | sec_blob->SessionKey.Length = 0; |
1283 | sec_blob->SessionKey.MaximumLength = 0; | |
1284 | } | |
2b149f11 | 1285 | |
b8da344b | 1286 | *buflen = tmp - *pbuffer; |
2b149f11 | 1287 | setup_ntlmv2_ret: |
89f150f4 | 1288 | return rc; |
0b3cc858 | 1289 | } |
0b3cc858 | 1290 | |
3f618223 | 1291 | enum securityEnum |
ef65aaed | 1292 | cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
3f618223 JL |
1293 | { |
1294 | switch (server->negflavor) { | |
1295 | case CIFS_NEGFLAVOR_EXTENDED: | |
1296 | switch (requested) { | |
1297 | case Kerberos: | |
1298 | case RawNTLMSSP: | |
1299 | return requested; | |
1300 | case Unspecified: | |
1301 | if (server->sec_ntlmssp && | |
1302 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
1303 | return RawNTLMSSP; | |
1304 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
1305 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
1306 | return Kerberos; | |
df561f66 | 1307 | fallthrough; |
3f618223 JL |
1308 | default: |
1309 | return Unspecified; | |
1310 | } | |
1311 | case CIFS_NEGFLAVOR_UNENCAP: | |
1312 | switch (requested) { | |
3f618223 JL |
1313 | case NTLMv2: |
1314 | return requested; | |
1315 | case Unspecified: | |
1316 | if (global_secflags & CIFSSEC_MAY_NTLMV2) | |
1317 | return NTLMv2; | |
21ac58f4 | 1318 | break; |
3f618223 | 1319 | default: |
dde2356c | 1320 | break; |
3f618223 | 1321 | } |
76a3c92e | 1322 | fallthrough; |
3f618223 JL |
1323 | default: |
1324 | return Unspecified; | |
1325 | } | |
1326 | } | |
1327 | ||
80a0e637 SP |
1328 | struct sess_data { |
1329 | unsigned int xid; | |
1330 | struct cifs_ses *ses; | |
f486ef8e | 1331 | struct TCP_Server_Info *server; |
80a0e637 SP |
1332 | struct nls_table *nls_cp; |
1333 | void (*func)(struct sess_data *); | |
1334 | int result; | |
1335 | ||
1336 | /* we will send the SMB in three pieces: | |
1337 | * a fixed length beginning part, an optional | |
1338 | * SPNEGO blob (which can be zero length), and a | |
1339 | * last part which will include the strings | |
1340 | * and rest of bcc area. This allows us to avoid | |
1341 | * a large buffer 17K allocation | |
1342 | */ | |
1343 | int buf0_type; | |
1344 | struct kvec iov[3]; | |
1345 | }; | |
1346 | ||
fb157ed2 | 1347 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
80a0e637 SP |
1348 | static int |
1349 | sess_alloc_buffer(struct sess_data *sess_data, int wct) | |
1350 | { | |
1351 | int rc; | |
1352 | struct cifs_ses *ses = sess_data->ses; | |
1353 | struct smb_hdr *smb_buf; | |
1354 | ||
1355 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
1356 | (void **)&smb_buf); | |
1357 | ||
1358 | if (rc) | |
1359 | return rc; | |
1360 | ||
1361 | sess_data->iov[0].iov_base = (char *)smb_buf; | |
1362 | sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; | |
1363 | /* | |
1364 | * This variable will be used to clear the buffer | |
1365 | * allocated above in case of any error in the calling function. | |
1366 | */ | |
1367 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
1368 | ||
1369 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
1370 | sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL); | |
1371 | if (!sess_data->iov[2].iov_base) { | |
1372 | rc = -ENOMEM; | |
1373 | goto out_free_smb_buf; | |
1374 | } | |
1375 | ||
1376 | return 0; | |
1377 | ||
1378 | out_free_smb_buf: | |
d72c7419 | 1379 | cifs_small_buf_release(smb_buf); |
80a0e637 SP |
1380 | sess_data->iov[0].iov_base = NULL; |
1381 | sess_data->iov[0].iov_len = 0; | |
1382 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1383 | return rc; | |
1384 | } | |
1385 | ||
1386 | static void | |
1387 | sess_free_buffer(struct sess_data *sess_data) | |
1388 | { | |
b854b4ee | 1389 | struct kvec *iov = sess_data->iov; |
a4e430c8 | 1390 | |
b854b4ee PA |
1391 | /* |
1392 | * Zero the session data before freeing, as it might contain sensitive info (keys, etc). | |
1393 | * Note that iov[1] is already freed by caller. | |
1394 | */ | |
1395 | if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base) | |
1396 | memzero_explicit(iov[0].iov_base, iov[0].iov_len); | |
80a0e637 | 1397 | |
b854b4ee | 1398 | free_rsp_buf(sess_data->buf0_type, iov[0].iov_base); |
80a0e637 | 1399 | sess_data->buf0_type = CIFS_NO_BUFFER; |
b854b4ee | 1400 | kfree_sensitive(iov[2].iov_base); |
80a0e637 SP |
1401 | } |
1402 | ||
1403 | static int | |
1404 | sess_establish_session(struct sess_data *sess_data) | |
1405 | { | |
1406 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1407 | struct TCP_Server_Info *server = sess_data->server; |
80a0e637 | 1408 | |
cc391b69 | 1409 | cifs_server_lock(server); |
f486ef8e SP |
1410 | if (!server->session_estab) { |
1411 | if (server->sign) { | |
1412 | server->session_key.response = | |
80a0e637 SP |
1413 | kmemdup(ses->auth_key.response, |
1414 | ses->auth_key.len, GFP_KERNEL); | |
f486ef8e | 1415 | if (!server->session_key.response) { |
cc391b69 | 1416 | cifs_server_unlock(server); |
80a0e637 SP |
1417 | return -ENOMEM; |
1418 | } | |
f486ef8e | 1419 | server->session_key.len = |
80a0e637 SP |
1420 | ses->auth_key.len; |
1421 | } | |
f486ef8e SP |
1422 | server->sequence_number = 0x2; |
1423 | server->session_estab = true; | |
80a0e637 | 1424 | } |
cc391b69 | 1425 | cifs_server_unlock(server); |
80a0e637 SP |
1426 | |
1427 | cifs_dbg(FYI, "CIFS session established successfully\n"); | |
80a0e637 SP |
1428 | return 0; |
1429 | } | |
1430 | ||
1431 | static int | |
1432 | sess_sendreceive(struct sess_data *sess_data) | |
1433 | { | |
1434 | int rc; | |
1435 | struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base; | |
1436 | __u16 count; | |
da502f7d | 1437 | struct kvec rsp_iov = { NULL, 0 }; |
80a0e637 SP |
1438 | |
1439 | count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len; | |
1a0e7f7c | 1440 | be32_add_cpu(&smb_buf->smb_buf_length, count); |
80a0e637 SP |
1441 | put_bcc(count, smb_buf); |
1442 | ||
1443 | rc = SendReceive2(sess_data->xid, sess_data->ses, | |
1444 | sess_data->iov, 3 /* num_iovecs */, | |
1445 | &sess_data->buf0_type, | |
da502f7d PS |
1446 | CIFS_LOG_ERROR, &rsp_iov); |
1447 | cifs_small_buf_release(sess_data->iov[0].iov_base); | |
1448 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
80a0e637 SP |
1449 | |
1450 | return rc; | |
1451 | } | |
1452 | ||
583cf7af SP |
1453 | static void |
1454 | sess_auth_ntlmv2(struct sess_data *sess_data) | |
1455 | { | |
1456 | int rc = 0; | |
1457 | struct smb_hdr *smb_buf; | |
1458 | SESSION_SETUP_ANDX *pSMB; | |
1459 | char *bcc_ptr; | |
1460 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1461 | struct TCP_Server_Info *server = sess_data->server; |
583cf7af SP |
1462 | __u32 capabilities; |
1463 | __u16 bytes_remaining; | |
1464 | ||
1465 | /* old style NTLM sessionsetup */ | |
1466 | /* wct = 13 */ | |
1467 | rc = sess_alloc_buffer(sess_data, 13); | |
1468 | if (rc) | |
1469 | goto out; | |
1470 | ||
1471 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1472 | bcc_ptr = sess_data->iov[2].iov_base; | |
f486ef8e | 1473 | capabilities = cifs_ssetup_hdr(ses, server, pSMB); |
583cf7af SP |
1474 | |
1475 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
1476 | ||
1477 | /* LM2 password would be here if we supported it */ | |
1478 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
1479 | ||
1a967d6c SM |
1480 | if (ses->user_name != NULL) { |
1481 | /* calculate nlmv2 response and session key */ | |
1482 | rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp); | |
1483 | if (rc) { | |
1484 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc); | |
1485 | goto out; | |
1486 | } | |
583cf7af | 1487 | |
1a967d6c SM |
1488 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
1489 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1490 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
583cf7af | 1491 | |
1a967d6c SM |
1492 | /* set case sensitive password length after tilen may get |
1493 | * assigned, tilen is 0 otherwise. | |
1494 | */ | |
1495 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
1496 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1497 | } else { | |
1498 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
1499 | } | |
583cf7af SP |
1500 | |
1501 | if (ses->capabilities & CAP_UNICODE) { | |
d7173623 | 1502 | if (!IS_ALIGNED(sess_data->iov[0].iov_len, 2)) { |
583cf7af SP |
1503 | *bcc_ptr = 0; |
1504 | bcc_ptr++; | |
1505 | } | |
1506 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1507 | } else { | |
1508 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1509 | } | |
1510 | ||
1511 | ||
1512 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1513 | (long) sess_data->iov[2].iov_base; | |
1514 | ||
1515 | rc = sess_sendreceive(sess_data); | |
1516 | if (rc) | |
1517 | goto out; | |
1518 | ||
1519 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1520 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1521 | ||
1522 | if (smb_buf->WordCount != 3) { | |
1523 | rc = -EIO; | |
1524 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1525 | goto out; | |
1526 | } | |
1527 | ||
1528 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1529 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1530 | ||
1531 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1532 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1533 | ||
1534 | bytes_remaining = get_bcc(smb_buf); | |
1535 | bcc_ptr = pByteArea(smb_buf); | |
1536 | ||
1537 | /* BB check if Unicode and decode strings */ | |
1538 | if (bytes_remaining == 0) { | |
1539 | /* no string area to decode, do nothing */ | |
1540 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1541 | /* unicode string area must be word-aligned */ | |
d7173623 | 1542 | if (!IS_ALIGNED((unsigned long)bcc_ptr - (unsigned long)smb_buf, 2)) { |
583cf7af SP |
1543 | ++bcc_ptr; |
1544 | --bytes_remaining; | |
1545 | } | |
1546 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1547 | sess_data->nls_cp); | |
1548 | } else { | |
1549 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1550 | sess_data->nls_cp); | |
1551 | } | |
1552 | ||
1553 | rc = sess_establish_session(sess_data); | |
1554 | out: | |
1555 | sess_data->result = rc; | |
1556 | sess_data->func = NULL; | |
1557 | sess_free_buffer(sess_data); | |
a4e430c8 | 1558 | kfree_sensitive(ses->auth_key.response); |
583cf7af SP |
1559 | ses->auth_key.response = NULL; |
1560 | } | |
1561 | ||
ee03c646 SP |
1562 | #ifdef CONFIG_CIFS_UPCALL |
1563 | static void | |
1564 | sess_auth_kerberos(struct sess_data *sess_data) | |
1565 | { | |
1566 | int rc = 0; | |
1567 | struct smb_hdr *smb_buf; | |
1568 | SESSION_SETUP_ANDX *pSMB; | |
1569 | char *bcc_ptr; | |
1570 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1571 | struct TCP_Server_Info *server = sess_data->server; |
ee03c646 SP |
1572 | __u32 capabilities; |
1573 | __u16 bytes_remaining; | |
1574 | struct key *spnego_key = NULL; | |
1575 | struct cifs_spnego_msg *msg; | |
1576 | u16 blob_len; | |
1577 | ||
1578 | /* extended security */ | |
1579 | /* wct = 12 */ | |
1580 | rc = sess_alloc_buffer(sess_data, 12); | |
1581 | if (rc) | |
1582 | goto out; | |
1583 | ||
1584 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1585 | bcc_ptr = sess_data->iov[2].iov_base; | |
f486ef8e | 1586 | capabilities = cifs_ssetup_hdr(ses, server, pSMB); |
ee03c646 | 1587 | |
f486ef8e | 1588 | spnego_key = cifs_get_spnego_key(ses, server); |
ee03c646 SP |
1589 | if (IS_ERR(spnego_key)) { |
1590 | rc = PTR_ERR(spnego_key); | |
1591 | spnego_key = NULL; | |
1592 | goto out; | |
1593 | } | |
1594 | ||
146aa8b1 | 1595 | msg = spnego_key->payload.data[0]; |
ee03c646 SP |
1596 | /* |
1597 | * check version field to make sure that cifs.upcall is | |
1598 | * sending us a response in an expected form | |
1599 | */ | |
1600 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
a0a3036b JP |
1601 | cifs_dbg(VFS, "incorrect version of cifs.upcall (expected %d but got %d)\n", |
1602 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
ee03c646 SP |
1603 | rc = -EKEYREJECTED; |
1604 | goto out_put_spnego_key; | |
1605 | } | |
1606 | ||
2fe58d97 | 1607 | kfree_sensitive(ses->auth_key.response); |
ee03c646 SP |
1608 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, |
1609 | GFP_KERNEL); | |
1610 | if (!ses->auth_key.response) { | |
a0a3036b JP |
1611 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", |
1612 | msg->sesskey_len); | |
ee03c646 SP |
1613 | rc = -ENOMEM; |
1614 | goto out_put_spnego_key; | |
1615 | } | |
1616 | ses->auth_key.len = msg->sesskey_len; | |
1617 | ||
1618 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
1619 | capabilities |= CAP_EXTENDED_SECURITY; | |
1620 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
1621 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1622 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1623 | pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len); | |
1624 | ||
1625 | if (ses->capabilities & CAP_UNICODE) { | |
1626 | /* unicode strings must be word aligned */ | |
d7173623 | 1627 | if (!IS_ALIGNED(sess_data->iov[0].iov_len + sess_data->iov[1].iov_len, 2)) { |
ee03c646 SP |
1628 | *bcc_ptr = 0; |
1629 | bcc_ptr++; | |
1630 | } | |
1631 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); | |
1632 | unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp); | |
1633 | } else { | |
1634 | /* BB: is this right? */ | |
1635 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1636 | } | |
1637 | ||
1638 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1639 | (long) sess_data->iov[2].iov_base; | |
1640 | ||
1641 | rc = sess_sendreceive(sess_data); | |
1642 | if (rc) | |
1643 | goto out_put_spnego_key; | |
1644 | ||
1645 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1646 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1647 | ||
1648 | if (smb_buf->WordCount != 4) { | |
1649 | rc = -EIO; | |
1650 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1651 | goto out_put_spnego_key; | |
1652 | } | |
1653 | ||
1654 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1655 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1656 | ||
1657 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1658 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1659 | ||
1660 | bytes_remaining = get_bcc(smb_buf); | |
1661 | bcc_ptr = pByteArea(smb_buf); | |
1662 | ||
1663 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
1664 | if (blob_len > bytes_remaining) { | |
1665 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1666 | blob_len); | |
1667 | rc = -EINVAL; | |
1668 | goto out_put_spnego_key; | |
1669 | } | |
1670 | bcc_ptr += blob_len; | |
1671 | bytes_remaining -= blob_len; | |
1672 | ||
1673 | /* BB check if Unicode and decode strings */ | |
1674 | if (bytes_remaining == 0) { | |
1675 | /* no string area to decode, do nothing */ | |
1676 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1677 | /* unicode string area must be word-aligned */ | |
d7173623 | 1678 | if (!IS_ALIGNED((unsigned long)bcc_ptr - (unsigned long)smb_buf, 2)) { |
ee03c646 SP |
1679 | ++bcc_ptr; |
1680 | --bytes_remaining; | |
1681 | } | |
1682 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1683 | sess_data->nls_cp); | |
1684 | } else { | |
1685 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1686 | sess_data->nls_cp); | |
1687 | } | |
1688 | ||
1689 | rc = sess_establish_session(sess_data); | |
1690 | out_put_spnego_key: | |
1691 | key_invalidate(spnego_key); | |
1692 | key_put(spnego_key); | |
1693 | out: | |
1694 | sess_data->result = rc; | |
1695 | sess_data->func = NULL; | |
1696 | sess_free_buffer(sess_data); | |
a4e430c8 | 1697 | kfree_sensitive(ses->auth_key.response); |
ee03c646 SP |
1698 | ses->auth_key.response = NULL; |
1699 | } | |
1700 | ||
ee03c646 | 1701 | #endif /* ! CONFIG_CIFS_UPCALL */ |
583cf7af | 1702 | |
cc87c47d SP |
1703 | /* |
1704 | * The required kvec buffers have to be allocated before calling this | |
1705 | * function. | |
1706 | */ | |
1707 | static int | |
1708 | _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data) | |
3979877e | 1709 | { |
3979877e | 1710 | SESSION_SETUP_ANDX *pSMB; |
cc87c47d | 1711 | struct cifs_ses *ses = sess_data->ses; |
f486ef8e | 1712 | struct TCP_Server_Info *server = sess_data->server; |
3979877e | 1713 | __u32 capabilities; |
cc87c47d | 1714 | char *bcc_ptr; |
254e55ed | 1715 | |
cc87c47d | 1716 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
cc87c47d | 1717 | |
f486ef8e | 1718 | capabilities = cifs_ssetup_hdr(ses, server, pSMB); |
cc87c47d SP |
1719 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { |
1720 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); | |
1721 | return -ENOSYS; | |
3534b850 | 1722 | } |
3979877e | 1723 | |
cc87c47d SP |
1724 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
1725 | capabilities |= CAP_EXTENDED_SECURITY; | |
1726 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
80a0e637 | 1727 | |
cc87c47d SP |
1728 | bcc_ptr = sess_data->iov[2].iov_base; |
1729 | /* unicode strings must be word aligned */ | |
d7173623 | 1730 | if (!IS_ALIGNED(sess_data->iov[0].iov_len + sess_data->iov[1].iov_len, 2)) { |
cc87c47d SP |
1731 | *bcc_ptr = 0; |
1732 | bcc_ptr++; | |
3f618223 | 1733 | } |
cc87c47d | 1734 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); |
3f618223 | 1735 | |
cc87c47d SP |
1736 | sess_data->iov[2].iov_len = (long) bcc_ptr - |
1737 | (long) sess_data->iov[2].iov_base; | |
80a0e637 | 1738 | |
cc87c47d SP |
1739 | return 0; |
1740 | } | |
1741 | ||
1742 | static void | |
1743 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data); | |
1744 | ||
1745 | static void | |
1746 | sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data) | |
1747 | { | |
1748 | int rc; | |
1749 | struct smb_hdr *smb_buf; | |
1750 | SESSION_SETUP_ANDX *pSMB; | |
1751 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1752 | struct TCP_Server_Info *server = sess_data->server; |
cc87c47d SP |
1753 | __u16 bytes_remaining; |
1754 | char *bcc_ptr; | |
49bd49f9 | 1755 | unsigned char *ntlmsspblob = NULL; |
cc87c47d SP |
1756 | u16 blob_len; |
1757 | ||
1758 | cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n"); | |
5c234aa5 | 1759 | |
cc87c47d SP |
1760 | /* |
1761 | * if memory allocation is successful, caller of this function | |
1762 | * frees it. | |
1763 | */ | |
1764 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
1765 | if (!ses->ntlmssp) { | |
1766 | rc = -ENOMEM; | |
1767 | goto out; | |
d3686d54 | 1768 | } |
cc87c47d | 1769 | ses->ntlmssp->sesskey_per_smbsess = false; |
d3686d54 | 1770 | |
cc87c47d SP |
1771 | /* wct = 12 */ |
1772 | rc = sess_alloc_buffer(sess_data, 12); | |
1773 | if (rc) | |
1774 | goto out; | |
0b3cc858 | 1775 | |
cc87c47d | 1776 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
3979877e | 1777 | |
cc87c47d | 1778 | /* Build security blob before we assemble the request */ |
49bd49f9 | 1779 | rc = build_ntlmssp_negotiate_blob(&ntlmsspblob, |
f486ef8e | 1780 | &blob_len, ses, server, |
49bd49f9 SP |
1781 | sess_data->nls_cp); |
1782 | if (rc) | |
e3548aaf | 1783 | goto out_free_ntlmsspblob; |
49bd49f9 SP |
1784 | |
1785 | sess_data->iov[1].iov_len = blob_len; | |
1786 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1787 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
cc87c47d SP |
1788 | |
1789 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
790fe579 | 1790 | if (rc) |
e3548aaf | 1791 | goto out_free_ntlmsspblob; |
3979877e | 1792 | |
cc87c47d | 1793 | rc = sess_sendreceive(sess_data); |
3979877e | 1794 | |
cc87c47d SP |
1795 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1796 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
750d1151 | 1797 | |
cc87c47d SP |
1798 | /* If true, rc here is expected and not an error */ |
1799 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
1800 | smb_buf->Status.CifsError == | |
1801 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)) | |
1802 | rc = 0; | |
2442421b | 1803 | |
cc87c47d | 1804 | if (rc) |
e3548aaf | 1805 | goto out_free_ntlmsspblob; |
cc87c47d SP |
1806 | |
1807 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); | |
1808 | ||
1809 | if (smb_buf->WordCount != 4) { | |
1810 | rc = -EIO; | |
1811 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
e3548aaf | 1812 | goto out_free_ntlmsspblob; |
5e6e6232 | 1813 | } |
3979877e | 1814 | |
cc87c47d SP |
1815 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
1816 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
2442421b | 1817 | |
cc87c47d SP |
1818 | bytes_remaining = get_bcc(smb_buf); |
1819 | bcc_ptr = pByteArea(smb_buf); | |
b4d6fcf1 | 1820 | |
cc87c47d SP |
1821 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1822 | if (blob_len > bytes_remaining) { | |
1823 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1824 | blob_len); | |
1825 | rc = -EINVAL; | |
e3548aaf | 1826 | goto out_free_ntlmsspblob; |
cc87c47d | 1827 | } |
0b3cc858 | 1828 | |
cc87c47d | 1829 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); |
e3548aaf SP |
1830 | |
1831 | out_free_ntlmsspblob: | |
a4e430c8 | 1832 | kfree_sensitive(ntlmsspblob); |
cc87c47d SP |
1833 | out: |
1834 | sess_free_buffer(sess_data); | |
1835 | ||
1836 | if (!rc) { | |
1837 | sess_data->func = sess_auth_rawntlmssp_authenticate; | |
1838 | return; | |
3979877e SF |
1839 | } |
1840 | ||
cc87c47d | 1841 | /* Else error. Cleanup */ |
a4e430c8 | 1842 | kfree_sensitive(ses->auth_key.response); |
cc87c47d | 1843 | ses->auth_key.response = NULL; |
a4e430c8 | 1844 | kfree_sensitive(ses->ntlmssp); |
cc87c47d | 1845 | ses->ntlmssp = NULL; |
2442421b | 1846 | |
cc87c47d SP |
1847 | sess_data->func = NULL; |
1848 | sess_data->result = rc; | |
1849 | } | |
3979877e | 1850 | |
cc87c47d SP |
1851 | static void |
1852 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data) | |
1853 | { | |
1854 | int rc; | |
1855 | struct smb_hdr *smb_buf; | |
1856 | SESSION_SETUP_ANDX *pSMB; | |
1857 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1858 | struct TCP_Server_Info *server = sess_data->server; |
cc87c47d SP |
1859 | __u16 bytes_remaining; |
1860 | char *bcc_ptr; | |
b8da344b | 1861 | unsigned char *ntlmsspblob = NULL; |
cc87c47d | 1862 | u16 blob_len; |
3979877e | 1863 | |
cc87c47d | 1864 | cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n"); |
3979877e | 1865 | |
cc87c47d SP |
1866 | /* wct = 12 */ |
1867 | rc = sess_alloc_buffer(sess_data, 12); | |
1868 | if (rc) | |
1869 | goto out; | |
3979877e | 1870 | |
cc87c47d SP |
1871 | /* Build security blob before we assemble the request */ |
1872 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1873 | smb_buf = (struct smb_hdr *)pSMB; | |
b8da344b | 1874 | rc = build_ntlmssp_auth_blob(&ntlmsspblob, |
f486ef8e SP |
1875 | &blob_len, ses, server, |
1876 | sess_data->nls_cp); | |
cc87c47d SP |
1877 | if (rc) |
1878 | goto out_free_ntlmsspblob; | |
1879 | sess_data->iov[1].iov_len = blob_len; | |
1880 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1881 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
1882 | /* | |
1883 | * Make sure that we tell the server that we are using | |
1884 | * the uid that it just gave us back on the response | |
1885 | * (challenge) | |
1886 | */ | |
1887 | smb_buf->Uid = ses->Suid; | |
1888 | ||
1889 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
0b3cc858 | 1890 | if (rc) |
cc87c47d | 1891 | goto out_free_ntlmsspblob; |
0b3cc858 | 1892 | |
cc87c47d SP |
1893 | rc = sess_sendreceive(sess_data); |
1894 | if (rc) | |
1895 | goto out_free_ntlmsspblob; | |
1896 | ||
1897 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1898 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
583cf7af | 1899 | if (smb_buf->WordCount != 4) { |
3979877e | 1900 | rc = -EIO; |
f96637be | 1901 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
cc87c47d | 1902 | goto out_free_ntlmsspblob; |
3979877e | 1903 | } |
cc87c47d SP |
1904 | |
1905 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
f96637be | 1906 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
cc87c47d | 1907 | |
ee9bbf46 SP |
1908 | if (ses->Suid != smb_buf->Uid) { |
1909 | ses->Suid = smb_buf->Uid; | |
1910 | cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid); | |
1911 | } | |
1912 | ||
690c522f | 1913 | bytes_remaining = get_bcc(smb_buf); |
3979877e | 1914 | bcc_ptr = pByteArea(smb_buf); |
583cf7af SP |
1915 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1916 | if (blob_len > bytes_remaining) { | |
1917 | cifs_dbg(VFS, "bad security blob length %d\n", | |
cc87c47d | 1918 | blob_len); |
583cf7af | 1919 | rc = -EINVAL; |
cc87c47d | 1920 | goto out_free_ntlmsspblob; |
790fe579 | 1921 | } |
583cf7af SP |
1922 | bcc_ptr += blob_len; |
1923 | bytes_remaining -= blob_len; | |
3979877e | 1924 | |
cc87c47d | 1925 | |
3979877e | 1926 | /* BB check if Unicode and decode strings */ |
fcda7f45 JL |
1927 | if (bytes_remaining == 0) { |
1928 | /* no string area to decode, do nothing */ | |
1929 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 | 1930 | /* unicode string area must be word-aligned */ |
d7173623 | 1931 | if (!IS_ALIGNED((unsigned long)bcc_ptr - (unsigned long)smb_buf, 2)) { |
27b87fe5 JL |
1932 | ++bcc_ptr; |
1933 | --bytes_remaining; | |
1934 | } | |
cc87c47d SP |
1935 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, |
1936 | sess_data->nls_cp); | |
27b87fe5 | 1937 | } else { |
cc87c47d SP |
1938 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, |
1939 | sess_data->nls_cp); | |
27b87fe5 | 1940 | } |
50c2f753 | 1941 | |
cc87c47d | 1942 | out_free_ntlmsspblob: |
a4e430c8 | 1943 | kfree_sensitive(ntlmsspblob); |
cc87c47d SP |
1944 | out: |
1945 | sess_free_buffer(sess_data); | |
d4e63bd6 | 1946 | |
74ce6135 | 1947 | if (!rc) |
cc87c47d | 1948 | rc = sess_establish_session(sess_data); |
d4e63bd6 | 1949 | |
cc87c47d | 1950 | /* Cleanup */ |
a4e430c8 | 1951 | kfree_sensitive(ses->auth_key.response); |
d4e63bd6 | 1952 | ses->auth_key.response = NULL; |
a4e430c8 | 1953 | kfree_sensitive(ses->ntlmssp); |
cc87c47d | 1954 | ses->ntlmssp = NULL; |
d4e63bd6 | 1955 | |
cc87c47d SP |
1956 | sess_data->func = NULL; |
1957 | sess_data->result = rc; | |
1958 | } | |
80a0e637 | 1959 | |
f486ef8e | 1960 | static int select_sec(struct sess_data *sess_data) |
cc87c47d SP |
1961 | { |
1962 | int type; | |
f486ef8e SP |
1963 | struct cifs_ses *ses = sess_data->ses; |
1964 | struct TCP_Server_Info *server = sess_data->server; | |
cc87c47d | 1965 | |
f486ef8e | 1966 | type = cifs_select_sectype(server, ses->sectype); |
cc87c47d SP |
1967 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1968 | if (type == Unspecified) { | |
a0a3036b | 1969 | cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); |
cc87c47d SP |
1970 | return -EINVAL; |
1971 | } | |
1972 | ||
1973 | switch (type) { | |
cc87c47d SP |
1974 | case NTLMv2: |
1975 | sess_data->func = sess_auth_ntlmv2; | |
1976 | break; | |
1977 | case Kerberos: | |
1978 | #ifdef CONFIG_CIFS_UPCALL | |
1979 | sess_data->func = sess_auth_kerberos; | |
1980 | break; | |
1981 | #else | |
1982 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1983 | return -ENOSYS; | |
cc87c47d SP |
1984 | #endif /* CONFIG_CIFS_UPCALL */ |
1985 | case RawNTLMSSP: | |
1986 | sess_data->func = sess_auth_rawntlmssp_negotiate; | |
1987 | break; | |
1988 | default: | |
1989 | cifs_dbg(VFS, "secType %d not supported!\n", type); | |
1990 | return -ENOSYS; | |
1991 | } | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
1996 | int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, | |
f486ef8e SP |
1997 | struct TCP_Server_Info *server, |
1998 | const struct nls_table *nls_cp) | |
cc87c47d SP |
1999 | { |
2000 | int rc = 0; | |
2001 | struct sess_data *sess_data; | |
2002 | ||
2003 | if (ses == NULL) { | |
2004 | WARN(1, "%s: ses == NULL!", __func__); | |
2005 | return -EINVAL; | |
2006 | } | |
2007 | ||
2008 | sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL); | |
2009 | if (!sess_data) | |
2010 | return -ENOMEM; | |
2011 | ||
cc87c47d SP |
2012 | sess_data->xid = xid; |
2013 | sess_data->ses = ses; | |
f486ef8e | 2014 | sess_data->server = server; |
cc87c47d SP |
2015 | sess_data->buf0_type = CIFS_NO_BUFFER; |
2016 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
2017 | ||
f486ef8e SP |
2018 | rc = select_sec(sess_data); |
2019 | if (rc) | |
2020 | goto out; | |
2021 | ||
cc87c47d SP |
2022 | while (sess_data->func) |
2023 | sess_data->func(sess_data); | |
2024 | ||
2025 | /* Store result before we free sess_data */ | |
80a0e637 | 2026 | rc = sess_data->result; |
cc87c47d SP |
2027 | |
2028 | out: | |
a4e430c8 | 2029 | kfree_sensitive(sess_data); |
80a0e637 | 2030 | return rc; |
3979877e | 2031 | } |
fb157ed2 | 2032 | #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ |