Commit | Line | Data |
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3979877e SF |
1 | /* |
2 | * fs/cifs/sess.c | |
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 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include "cifspdu.h" | |
25 | #include "cifsglob.h" | |
26 | #include "cifsproto.h" | |
27 | #include "cifs_unicode.h" | |
28 | #include "cifs_debug.h" | |
29 | #include "ntlmssp.h" | |
30 | #include "nterr.h" | |
9c53588e | 31 | #include <linux/utsname.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
2442421b | 33 | #include "cifs_spnego.h" |
d70e9fa5 AA |
34 | #include "smb2proto.h" |
35 | ||
36 | bool | |
37 | is_server_using_iface(struct TCP_Server_Info *server, | |
38 | struct cifs_server_iface *iface) | |
39 | { | |
40 | struct sockaddr_in *i4 = (struct sockaddr_in *)&iface->sockaddr; | |
41 | struct sockaddr_in6 *i6 = (struct sockaddr_in6 *)&iface->sockaddr; | |
42 | struct sockaddr_in *s4 = (struct sockaddr_in *)&server->dstaddr; | |
43 | struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)&server->dstaddr; | |
44 | ||
45 | if (server->dstaddr.ss_family != iface->sockaddr.ss_family) | |
46 | return false; | |
47 | if (server->dstaddr.ss_family == AF_INET) { | |
48 | if (s4->sin_addr.s_addr != i4->sin_addr.s_addr) | |
49 | return false; | |
50 | } else if (server->dstaddr.ss_family == AF_INET6) { | |
51 | if (memcmp(&s6->sin6_addr, &i6->sin6_addr, | |
52 | sizeof(i6->sin6_addr)) != 0) | |
53 | return false; | |
54 | } else { | |
55 | /* unknown family.. */ | |
56 | return false; | |
57 | } | |
58 | return true; | |
59 | } | |
60 | ||
61 | bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface) | |
62 | { | |
63 | int i; | |
64 | ||
65 | for (i = 0; i < ses->chan_count; i++) { | |
66 | if (is_server_using_iface(ses->chans[i].server, iface)) | |
67 | return true; | |
68 | } | |
69 | return false; | |
70 | } | |
71 | ||
72 | /* returns number of channels added */ | |
73 | int cifs_try_adding_channels(struct cifs_ses *ses) | |
74 | { | |
75 | int old_chan_count = ses->chan_count; | |
76 | int left = ses->chan_max - ses->chan_count; | |
77 | int i = 0; | |
78 | int rc = 0; | |
65a37a34 | 79 | int tries = 0; |
9a7d5a9e AA |
80 | struct cifs_server_iface *ifaces = NULL; |
81 | size_t iface_count; | |
d70e9fa5 AA |
82 | |
83 | if (left <= 0) { | |
84 | cifs_dbg(FYI, | |
85 | "ses already at max_channels (%zu), nothing to open\n", | |
86 | ses->chan_max); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | if (ses->server->dialect < SMB30_PROT_ID) { | |
91 | cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n"); | |
92 | return 0; | |
93 | } | |
94 | ||
9a7d5a9e AA |
95 | /* |
96 | * Make a copy of the iface list at the time and use that | |
97 | * instead so as to not hold the iface spinlock for opening | |
98 | * channels | |
99 | */ | |
100 | spin_lock(&ses->iface_lock); | |
101 | iface_count = ses->iface_count; | |
102 | if (iface_count <= 0) { | |
103 | spin_unlock(&ses->iface_lock); | |
343a1b77 | 104 | cifs_dbg(VFS, "no iface list available to open channels\n"); |
9a7d5a9e AA |
105 | return 0; |
106 | } | |
107 | ifaces = kmemdup(ses->iface_list, iface_count*sizeof(*ifaces), | |
108 | GFP_ATOMIC); | |
109 | if (!ifaces) { | |
110 | spin_unlock(&ses->iface_lock); | |
111 | return 0; | |
112 | } | |
113 | spin_unlock(&ses->iface_lock); | |
114 | ||
65a37a34 AA |
115 | /* |
116 | * Keep connecting to same, fastest, iface for all channels as | |
117 | * long as its RSS. Try next fastest one if not RSS or channel | |
118 | * creation fails. | |
119 | */ | |
120 | while (left > 0) { | |
d70e9fa5 AA |
121 | struct cifs_server_iface *iface; |
122 | ||
65a37a34 AA |
123 | tries++; |
124 | if (tries > 3*ses->chan_max) { | |
125 | cifs_dbg(FYI, "too many attempt at opening channels (%d channels left to open)\n", | |
126 | left); | |
127 | break; | |
128 | } | |
129 | ||
9a7d5a9e | 130 | iface = &ifaces[i]; |
65a37a34 | 131 | if (is_ses_using_iface(ses, iface) && !iface->rss_capable) { |
9a7d5a9e | 132 | i = (i+1) % iface_count; |
d70e9fa5 | 133 | continue; |
65a37a34 | 134 | } |
d70e9fa5 AA |
135 | |
136 | rc = cifs_ses_add_channel(ses, iface); | |
137 | if (rc) { | |
65a37a34 AA |
138 | cifs_dbg(FYI, "failed to open extra channel on iface#%d rc=%d\n", |
139 | i, rc); | |
9a7d5a9e | 140 | i = (i+1) % iface_count; |
d70e9fa5 AA |
141 | continue; |
142 | } | |
143 | ||
65a37a34 AA |
144 | cifs_dbg(FYI, "successfully opened new channel on iface#%d\n", |
145 | i); | |
d70e9fa5 AA |
146 | left--; |
147 | } | |
148 | ||
9a7d5a9e | 149 | kfree(ifaces); |
d70e9fa5 AA |
150 | return ses->chan_count - old_chan_count; |
151 | } | |
152 | ||
153 | int | |
154 | cifs_ses_add_channel(struct cifs_ses *ses, struct cifs_server_iface *iface) | |
155 | { | |
156 | struct cifs_chan *chan; | |
157 | struct smb_vol vol = {NULL}; | |
158 | static const char unc_fmt[] = "\\%s\\foo"; | |
159 | char unc[sizeof(unc_fmt)+SERVER_NAME_LEN_WITH_NULL] = {0}; | |
160 | struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; | |
161 | struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; | |
162 | int rc; | |
163 | unsigned int xid = get_xid(); | |
164 | ||
165 | cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ", | |
166 | ses, iface->speed, iface->rdma_capable ? "yes" : "no"); | |
167 | if (iface->sockaddr.ss_family == AF_INET) | |
168 | cifs_dbg(FYI, "ip:%pI4)\n", &ipv4->sin_addr); | |
169 | else | |
170 | cifs_dbg(FYI, "ip:%pI6)\n", &ipv6->sin6_addr); | |
171 | ||
172 | /* | |
173 | * Setup a smb_vol with mostly the same info as the existing | |
174 | * session and overwrite it with the requested iface data. | |
175 | * | |
176 | * We need to setup at least the fields used for negprot and | |
177 | * sesssetup. | |
178 | * | |
179 | * We only need the volume here, so we can reuse memory from | |
180 | * the session and server without caring about memory | |
181 | * management. | |
182 | */ | |
183 | ||
184 | /* Always make new connection for now (TODO?) */ | |
185 | vol.nosharesock = true; | |
186 | ||
187 | /* Auth */ | |
188 | vol.domainauto = ses->domainAuto; | |
189 | vol.domainname = ses->domainName; | |
190 | vol.username = ses->user_name; | |
191 | vol.password = ses->password; | |
192 | vol.sectype = ses->sectype; | |
193 | vol.sign = ses->sign; | |
194 | ||
195 | /* UNC and paths */ | |
196 | /* XXX: Use ses->server->hostname? */ | |
197 | sprintf(unc, unc_fmt, ses->serverName); | |
198 | vol.UNC = unc; | |
199 | vol.prepath = ""; | |
200 | ||
201 | /* Re-use same version as master connection */ | |
202 | vol.vals = ses->server->vals; | |
203 | vol.ops = ses->server->ops; | |
204 | ||
205 | vol.noblocksnd = ses->server->noblocksnd; | |
206 | vol.noautotune = ses->server->noautotune; | |
207 | vol.sockopt_tcp_nodelay = ses->server->tcp_nodelay; | |
208 | vol.echo_interval = ses->server->echo_interval / HZ; | |
209 | ||
210 | /* | |
211 | * This will be used for encoding/decoding user/domain/pw | |
212 | * during sess setup auth. | |
213 | * | |
214 | * XXX: We use the default for simplicity but the proper way | |
215 | * would be to use the one that ses used, which is not | |
216 | * stored. This might break when dealing with non-ascii | |
217 | * strings. | |
218 | */ | |
219 | vol.local_nls = load_nls_default(); | |
220 | ||
221 | /* Use RDMA if possible */ | |
222 | vol.rdma = iface->rdma_capable; | |
223 | memcpy(&vol.dstaddr, &iface->sockaddr, sizeof(struct sockaddr_storage)); | |
224 | ||
225 | /* reuse master con client guid */ | |
226 | memcpy(&vol.client_guid, ses->server->client_guid, | |
227 | SMB2_CLIENT_GUID_SIZE); | |
228 | vol.use_client_guid = true; | |
229 | ||
230 | mutex_lock(&ses->session_mutex); | |
231 | ||
232 | chan = &ses->chans[ses->chan_count]; | |
233 | chan->server = cifs_get_tcp_session(&vol); | |
234 | if (IS_ERR(chan->server)) { | |
235 | rc = PTR_ERR(chan->server); | |
236 | chan->server = NULL; | |
237 | goto out; | |
238 | } | |
3345bb44 PAS |
239 | spin_lock(&cifs_tcp_ses_lock); |
240 | chan->server->is_channel = true; | |
241 | spin_unlock(&cifs_tcp_ses_lock); | |
d70e9fa5 AA |
242 | |
243 | /* | |
244 | * We need to allocate the server crypto now as we will need | |
245 | * to sign packets before we generate the channel signing key | |
246 | * (we sign with the session key) | |
247 | */ | |
248 | rc = smb311_crypto_shash_allocate(chan->server); | |
249 | if (rc) { | |
250 | cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); | |
251 | goto out; | |
252 | } | |
253 | ||
254 | ses->binding = true; | |
255 | rc = cifs_negotiate_protocol(xid, ses); | |
256 | if (rc) | |
257 | goto out; | |
258 | ||
259 | rc = cifs_setup_session(xid, ses, vol.local_nls); | |
260 | if (rc) | |
261 | goto out; | |
262 | ||
263 | /* success, put it on the list | |
264 | * XXX: sharing ses between 2 tcp server is not possible, the | |
265 | * way "internal" linked lists works in linux makes element | |
266 | * only able to belong to one list | |
267 | * | |
268 | * the binding session is already established so the rest of | |
269 | * the code should be able to look it up, no need to add the | |
270 | * ses to the new server. | |
271 | */ | |
272 | ||
273 | ses->chan_count++; | |
274 | atomic_set(&ses->chan_seq, 0); | |
275 | out: | |
276 | ses->binding = false; | |
277 | mutex_unlock(&ses->session_mutex); | |
278 | ||
279 | if (rc && chan->server) | |
280 | cifs_put_tcp_session(chan->server, 0); | |
281 | unload_nls(vol.local_nls); | |
282 | ||
283 | return rc; | |
284 | } | |
3979877e | 285 | |
96daf2b0 | 286 | static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB) |
3979877e SF |
287 | { |
288 | __u32 capabilities = 0; | |
289 | ||
290 | /* init fields common to all four types of SessSetup */ | |
eca6acf9 SF |
291 | /* Note that offsets for first seven fields in req struct are same */ |
292 | /* in CIFS Specs so does not matter which of 3 forms of struct */ | |
293 | /* that we use in next few lines */ | |
294 | /* Note that header is initialized to zero in header_assemble */ | |
3979877e | 295 | pSMB->req.AndXCommand = 0xFF; |
c974befa JL |
296 | pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32, |
297 | CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4, | |
298 | USHRT_MAX)); | |
3979877e | 299 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); |
bc09d141 | 300 | pSMB->req.VcNumber = cpu_to_le16(1); |
3979877e SF |
301 | |
302 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
303 | ||
790fe579 | 304 | /* BB verify whether signing required on neg or just on auth frame |
3979877e SF |
305 | (and NTLM case) */ |
306 | ||
307 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
308 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
309 | ||
38d77c50 | 310 | if (ses->server->sign) |
3979877e SF |
311 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
312 | ||
313 | if (ses->capabilities & CAP_UNICODE) { | |
314 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
315 | capabilities |= CAP_UNICODE; | |
316 | } | |
317 | if (ses->capabilities & CAP_STATUS32) { | |
318 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
319 | capabilities |= CAP_STATUS32; | |
320 | } | |
321 | if (ses->capabilities & CAP_DFS) { | |
322 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
323 | capabilities |= CAP_DFS; | |
324 | } | |
26f57364 | 325 | if (ses->capabilities & CAP_UNIX) |
3979877e | 326 | capabilities |= CAP_UNIX; |
3979877e | 327 | |
3979877e SF |
328 | return capabilities; |
329 | } | |
330 | ||
0d3a01fa JL |
331 | static void |
332 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
333 | { | |
334 | char *bcc_ptr = *pbcc_area; | |
335 | int bytes_ret = 0; | |
336 | ||
337 | /* Copy OS version */ | |
acbbb76a SF |
338 | bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32, |
339 | nls_cp); | |
0d3a01fa | 340 | bcc_ptr += 2 * bytes_ret; |
acbbb76a SF |
341 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release, |
342 | 32, nls_cp); | |
0d3a01fa JL |
343 | bcc_ptr += 2 * bytes_ret; |
344 | bcc_ptr += 2; /* trailing null */ | |
345 | ||
acbbb76a SF |
346 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, |
347 | 32, nls_cp); | |
0d3a01fa JL |
348 | bcc_ptr += 2 * bytes_ret; |
349 | bcc_ptr += 2; /* trailing null */ | |
350 | ||
351 | *pbcc_area = bcc_ptr; | |
352 | } | |
353 | ||
96daf2b0 | 354 | static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses, |
0d3a01fa JL |
355 | const struct nls_table *nls_cp) |
356 | { | |
357 | char *bcc_ptr = *pbcc_area; | |
358 | int bytes_ret = 0; | |
359 | ||
360 | /* copy domain */ | |
361 | if (ses->domainName == NULL) { | |
362 | /* Sending null domain better than using a bogus domain name (as | |
363 | we did briefly in 2.6.18) since server will use its default */ | |
364 | *bcc_ptr = 0; | |
365 | *(bcc_ptr+1) = 0; | |
366 | bytes_ret = 0; | |
367 | } else | |
acbbb76a | 368 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName, |
057d6332 | 369 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0d3a01fa JL |
370 | bcc_ptr += 2 * bytes_ret; |
371 | bcc_ptr += 2; /* account for null terminator */ | |
372 | ||
373 | *pbcc_area = bcc_ptr; | |
374 | } | |
375 | ||
376 | ||
96daf2b0 | 377 | static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 378 | const struct nls_table *nls_cp) |
3979877e | 379 | { |
790fe579 | 380 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
381 | int bytes_ret = 0; |
382 | ||
383 | /* BB FIXME add check that strings total less | |
384 | than 335 or will need to send them as arrays */ | |
385 | ||
0223cf0b SF |
386 | /* unicode strings, must be word aligned before the call */ |
387 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
388 | *bcc_ptr = 0; |
389 | bcc_ptr++; | |
0223cf0b | 390 | } */ |
3979877e | 391 | /* copy user */ |
8727c8a8 | 392 | if (ses->user_name == NULL) { |
6e659c63 SF |
393 | /* null user mount */ |
394 | *bcc_ptr = 0; | |
395 | *(bcc_ptr+1) = 0; | |
301a6a31 | 396 | } else { |
acbbb76a | 397 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name, |
8c3a2b4c | 398 | CIFS_MAX_USERNAME_LEN, nls_cp); |
3979877e SF |
399 | } |
400 | bcc_ptr += 2 * bytes_ret; | |
401 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 402 | |
0d3a01fa JL |
403 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
404 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
405 | |
406 | *pbcc_area = bcc_ptr; | |
407 | } | |
408 | ||
96daf2b0 | 409 | static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 410 | const struct nls_table *nls_cp) |
3979877e | 411 | { |
790fe579 | 412 | char *bcc_ptr = *pbcc_area; |
340625e6 | 413 | int len; |
3979877e SF |
414 | |
415 | /* copy user */ | |
416 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 | 417 | /* copy user */ |
de47a417 | 418 | if (ses->user_name != NULL) { |
340625e6 RS |
419 | len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); |
420 | if (WARN_ON_ONCE(len < 0)) | |
421 | len = CIFS_MAX_USERNAME_LEN - 1; | |
422 | bcc_ptr += len; | |
de47a417 | 423 | } |
8727c8a8 | 424 | /* else null user mount */ |
3979877e | 425 | *bcc_ptr = 0; |
790fe579 | 426 | bcc_ptr++; /* account for null termination */ |
3979877e | 427 | |
790fe579 | 428 | /* copy domain */ |
790fe579 | 429 | if (ses->domainName != NULL) { |
340625e6 RS |
430 | len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); |
431 | if (WARN_ON_ONCE(len < 0)) | |
432 | len = CIFS_MAX_DOMAINNAME_LEN - 1; | |
433 | bcc_ptr += len; | |
790fe579 | 434 | } /* else we will send a null domain name |
6e659c63 | 435 | so the server will default to its own domain */ |
3979877e SF |
436 | *bcc_ptr = 0; |
437 | bcc_ptr++; | |
438 | ||
439 | /* BB check for overflow here */ | |
440 | ||
441 | strcpy(bcc_ptr, "Linux version "); | |
442 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
443 | strcpy(bcc_ptr, init_utsname()->release); |
444 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
445 | |
446 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
447 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
448 | ||
790fe579 | 449 | *pbcc_area = bcc_ptr; |
3979877e SF |
450 | } |
451 | ||
59140797 | 452 | static void |
96daf2b0 | 453 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses, |
59140797 | 454 | const struct nls_table *nls_cp) |
3979877e | 455 | { |
59140797 | 456 | int len; |
790fe579 | 457 | char *data = *pbcc_area; |
3979877e | 458 | |
f96637be | 459 | cifs_dbg(FYI, "bleft %d\n", bleft); |
3979877e | 460 | |
26f57364 | 461 | kfree(ses->serverOS); |
acbbb76a | 462 | ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 463 | cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS); |
59140797 JL |
464 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
465 | data += len; | |
466 | bleft -= len; | |
467 | if (bleft <= 0) | |
468 | return; | |
3979877e | 469 | |
26f57364 | 470 | kfree(ses->serverNOS); |
acbbb76a | 471 | ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 472 | cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS); |
59140797 JL |
473 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
474 | data += len; | |
475 | bleft -= len; | |
476 | if (bleft <= 0) | |
477 | return; | |
790fe579 | 478 | |
26f57364 | 479 | kfree(ses->serverDomain); |
acbbb76a | 480 | ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 481 | cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain); |
790fe579 | 482 | |
59140797 | 483 | return; |
3979877e SF |
484 | } |
485 | ||
7d066459 JL |
486 | static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, |
487 | struct cifs_ses *ses, | |
488 | const struct nls_table *nls_cp) | |
3979877e | 489 | { |
3979877e | 490 | int len; |
790fe579 | 491 | char *bcc_ptr = *pbcc_area; |
3979877e | 492 | |
f96637be | 493 | cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft); |
50c2f753 | 494 | |
3979877e | 495 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 496 | if (len >= bleft) |
7d066459 | 497 | return; |
50c2f753 | 498 | |
26f57364 | 499 | kfree(ses->serverOS); |
3979877e | 500 | |
340625e6 | 501 | ses->serverOS = kmalloc(len + 1, GFP_KERNEL); |
27b7edcf | 502 | if (ses->serverOS) { |
340625e6 RS |
503 | memcpy(ses->serverOS, bcc_ptr, len); |
504 | ses->serverOS[len] = 0; | |
27b7edcf NJ |
505 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) |
506 | cifs_dbg(FYI, "OS/2 server\n"); | |
507 | } | |
3979877e SF |
508 | |
509 | bcc_ptr += len + 1; | |
510 | bleft -= len + 1; | |
511 | ||
512 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 513 | if (len >= bleft) |
7d066459 | 514 | return; |
3979877e | 515 | |
26f57364 | 516 | kfree(ses->serverNOS); |
3979877e | 517 | |
340625e6 RS |
518 | ses->serverNOS = kmalloc(len + 1, GFP_KERNEL); |
519 | if (ses->serverNOS) { | |
520 | memcpy(ses->serverNOS, bcc_ptr, len); | |
521 | ses->serverNOS[len] = 0; | |
522 | } | |
3979877e SF |
523 | |
524 | bcc_ptr += len + 1; | |
525 | bleft -= len + 1; | |
526 | ||
790fe579 SF |
527 | len = strnlen(bcc_ptr, bleft); |
528 | if (len > bleft) | |
7d066459 | 529 | return; |
3979877e | 530 | |
9ac00b7d SF |
531 | /* No domain field in LANMAN case. Domain is |
532 | returned by old servers in the SMB negprot response */ | |
533 | /* BB For newer servers which do not support Unicode, | |
534 | but thus do return domain here we could add parsing | |
535 | for it later, but it is not very important */ | |
f96637be | 536 | cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); |
3979877e SF |
537 | } |
538 | ||
5478f9ba | 539 | int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
96daf2b0 | 540 | struct cifs_ses *ses) |
0b3cc858 | 541 | { |
2b149f11 SP |
542 | unsigned int tioffset; /* challenge message target info area */ |
543 | unsigned int tilen; /* challenge message target info area length */ | |
544 | ||
0b3cc858 SF |
545 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; |
546 | ||
547 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
f96637be | 548 | cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len); |
0b3cc858 SF |
549 | return -EINVAL; |
550 | } | |
551 | ||
552 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
f96637be JP |
553 | cifs_dbg(VFS, "blob signature incorrect %s\n", |
554 | pblob->Signature); | |
0b3cc858 SF |
555 | return -EINVAL; |
556 | } | |
557 | if (pblob->MessageType != NtLmChallenge) { | |
f96637be JP |
558 | cifs_dbg(VFS, "Incorrect message type %d\n", |
559 | pblob->MessageType); | |
0b3cc858 SF |
560 | return -EINVAL; |
561 | } | |
562 | ||
d3686d54 | 563 | memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
0b3cc858 SF |
564 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ |
565 | /* In particular we can examine sign flags */ | |
566 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
567 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
d3686d54 | 568 | ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); |
5443d130 SF |
569 | tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset); |
570 | tilen = le16_to_cpu(pblob->TargetInfoArray.Length); | |
4991a5fa | 571 | if (tioffset > blob_len || tioffset + tilen > blob_len) { |
f96637be JP |
572 | cifs_dbg(VFS, "tioffset + tilen too high %u + %u", |
573 | tioffset, tilen); | |
4991a5fa DC |
574 | return -EINVAL; |
575 | } | |
d3686d54 | 576 | if (tilen) { |
f7f7c185 SMP |
577 | ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen, |
578 | GFP_KERNEL); | |
d3686d54 | 579 | if (!ses->auth_key.response) { |
f96637be | 580 | cifs_dbg(VFS, "Challenge target info alloc failure"); |
2b149f11 SP |
581 | return -ENOMEM; |
582 | } | |
d3686d54 | 583 | ses->auth_key.len = tilen; |
2b149f11 SP |
584 | } |
585 | ||
0b3cc858 SF |
586 | return 0; |
587 | } | |
588 | ||
0b3cc858 SF |
589 | /* BB Move to ntlmssp.c eventually */ |
590 | ||
591 | /* We do not malloc the blob, it is passed in pbuffer, because | |
592 | it is fixed size, and small, making this approach cleaner */ | |
5478f9ba | 593 | void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, |
96daf2b0 | 594 | struct cifs_ses *ses) |
0b3cc858 | 595 | { |
f6a6bf7c | 596 | struct TCP_Server_Info *server = cifs_ses_server(ses); |
0b3cc858 SF |
597 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; |
598 | __u32 flags; | |
599 | ||
df8fbc24 | 600 | memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); |
0b3cc858 SF |
601 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
602 | sec_blob->MessageType = NtLmNegotiate; | |
603 | ||
604 | /* BB is NTLMV2 session security format easier to use here? */ | |
605 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
606 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
607 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
608 | NTLMSSP_NEGOTIATE_SEAL; | |
f6a6bf7c | 609 | if (server->sign) |
745e507a | 610 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
f6a6bf7c | 611 | if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
cabfb368 | 612 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; |
0b3cc858 | 613 | |
df8fbc24 | 614 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
615 | |
616 | sec_blob->WorkstationName.BufferOffset = 0; | |
617 | sec_blob->WorkstationName.Length = 0; | |
618 | sec_blob->WorkstationName.MaximumLength = 0; | |
619 | ||
620 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
621 | sec_blob->DomainName.BufferOffset = 0; | |
622 | sec_blob->DomainName.Length = 0; | |
623 | sec_blob->DomainName.MaximumLength = 0; | |
624 | } | |
625 | ||
b8da344b JM |
626 | static int size_of_ntlmssp_blob(struct cifs_ses *ses) |
627 | { | |
628 | int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len | |
629 | - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2; | |
630 | ||
631 | if (ses->domainName) | |
632 | sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); | |
633 | else | |
634 | sz += 2; | |
635 | ||
636 | if (ses->user_name) | |
637 | sz += 2 * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); | |
638 | else | |
639 | sz += 2; | |
640 | ||
641 | return sz; | |
642 | } | |
643 | ||
644 | int build_ntlmssp_auth_blob(unsigned char **pbuffer, | |
89f150f4 | 645 | u16 *buflen, |
96daf2b0 | 646 | struct cifs_ses *ses, |
2b149f11 | 647 | const struct nls_table *nls_cp) |
0b3cc858 | 648 | { |
2b149f11 | 649 | int rc; |
b8da344b | 650 | AUTHENTICATE_MESSAGE *sec_blob; |
0b3cc858 SF |
651 | __u32 flags; |
652 | unsigned char *tmp; | |
0b3cc858 | 653 | |
b8da344b JM |
654 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
655 | if (rc) { | |
656 | cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc); | |
657 | *buflen = 0; | |
658 | goto setup_ntlmv2_ret; | |
659 | } | |
660 | *pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL); | |
126c97f4 NMG |
661 | if (!*pbuffer) { |
662 | rc = -ENOMEM; | |
663 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
664 | *buflen = 0; | |
665 | goto setup_ntlmv2_ret; | |
666 | } | |
b8da344b JM |
667 | sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer; |
668 | ||
0b3cc858 SF |
669 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
670 | sec_blob->MessageType = NtLmAuthenticate; | |
671 | ||
672 | flags = NTLMSSP_NEGOTIATE_56 | | |
673 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
674 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
675 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
676 | NTLMSSP_NEGOTIATE_SEAL; | |
677 | if (ses->server->sign) | |
0b3cc858 | 678 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
679 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
680 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 681 | |
b8da344b | 682 | tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); |
df8fbc24 | 683 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
684 | |
685 | sec_blob->LmChallengeResponse.BufferOffset = | |
686 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
687 | sec_blob->LmChallengeResponse.Length = 0; | |
688 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
689 | ||
b8da344b JM |
690 | sec_blob->NtChallengeResponse.BufferOffset = |
691 | cpu_to_le32(tmp - *pbuffer); | |
cfda35d9 | 692 | if (ses->user_name != NULL) { |
cfda35d9 SM |
693 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
694 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
695 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
696 | ||
697 | sec_blob->NtChallengeResponse.Length = | |
698 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
699 | sec_blob->NtChallengeResponse.MaximumLength = | |
700 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
701 | } else { | |
702 | /* | |
703 | * don't send an NT Response for anonymous access | |
704 | */ | |
705 | sec_blob->NtChallengeResponse.Length = 0; | |
706 | sec_blob->NtChallengeResponse.MaximumLength = 0; | |
2b149f11 | 707 | } |
0b3cc858 SF |
708 | |
709 | if (ses->domainName == NULL) { | |
b8da344b | 710 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
711 | sec_blob->DomainName.Length = 0; |
712 | sec_blob->DomainName.MaximumLength = 0; | |
713 | tmp += 2; | |
714 | } else { | |
715 | int len; | |
acbbb76a | 716 | len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName, |
202d772b | 717 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0b3cc858 | 718 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 719 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
720 | sec_blob->DomainName.Length = cpu_to_le16(len); |
721 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
722 | tmp += len; | |
723 | } | |
724 | ||
8727c8a8 | 725 | if (ses->user_name == NULL) { |
b8da344b | 726 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
727 | sec_blob->UserName.Length = 0; |
728 | sec_blob->UserName.MaximumLength = 0; | |
729 | tmp += 2; | |
730 | } else { | |
731 | int len; | |
acbbb76a | 732 | len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name, |
8c3a2b4c | 733 | CIFS_MAX_USERNAME_LEN, nls_cp); |
0b3cc858 | 734 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 735 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
736 | sec_blob->UserName.Length = cpu_to_le16(len); |
737 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
738 | tmp += len; | |
739 | } | |
740 | ||
b8da344b | 741 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
742 | sec_blob->WorkstationName.Length = 0; |
743 | sec_blob->WorkstationName.MaximumLength = 0; | |
744 | tmp += 2; | |
745 | ||
df8fbc24 SP |
746 | if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || |
747 | (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) | |
748 | && !calc_seckey(ses)) { | |
d3686d54 | 749 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
b8da344b | 750 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
751 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); |
752 | sec_blob->SessionKey.MaximumLength = | |
753 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
754 | tmp += CIFS_CPHTXT_SIZE; | |
755 | } else { | |
b8da344b | 756 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
757 | sec_blob->SessionKey.Length = 0; |
758 | sec_blob->SessionKey.MaximumLength = 0; | |
759 | } | |
2b149f11 | 760 | |
b8da344b | 761 | *buflen = tmp - *pbuffer; |
2b149f11 | 762 | setup_ntlmv2_ret: |
89f150f4 | 763 | return rc; |
0b3cc858 | 764 | } |
0b3cc858 | 765 | |
3f618223 | 766 | enum securityEnum |
ef65aaed | 767 | cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
3f618223 JL |
768 | { |
769 | switch (server->negflavor) { | |
770 | case CIFS_NEGFLAVOR_EXTENDED: | |
771 | switch (requested) { | |
772 | case Kerberos: | |
773 | case RawNTLMSSP: | |
774 | return requested; | |
775 | case Unspecified: | |
776 | if (server->sec_ntlmssp && | |
777 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
778 | return RawNTLMSSP; | |
779 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
780 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
781 | return Kerberos; | |
782 | /* Fallthrough */ | |
783 | default: | |
784 | return Unspecified; | |
785 | } | |
786 | case CIFS_NEGFLAVOR_UNENCAP: | |
787 | switch (requested) { | |
788 | case NTLM: | |
789 | case NTLMv2: | |
790 | return requested; | |
791 | case Unspecified: | |
792 | if (global_secflags & CIFSSEC_MAY_NTLMV2) | |
793 | return NTLMv2; | |
794 | if (global_secflags & CIFSSEC_MAY_NTLM) | |
795 | return NTLM; | |
3f618223 | 796 | default: |
dde2356c | 797 | break; |
3f618223 | 798 | } |
07fa6010 | 799 | /* Fallthrough - to attempt LANMAN authentication next */ |
3f618223 JL |
800 | case CIFS_NEGFLAVOR_LANMAN: |
801 | switch (requested) { | |
802 | case LANMAN: | |
803 | return requested; | |
804 | case Unspecified: | |
805 | if (global_secflags & CIFSSEC_MAY_LANMAN) | |
806 | return LANMAN; | |
807 | /* Fallthrough */ | |
808 | default: | |
809 | return Unspecified; | |
810 | } | |
811 | default: | |
812 | return Unspecified; | |
813 | } | |
814 | } | |
815 | ||
80a0e637 SP |
816 | struct sess_data { |
817 | unsigned int xid; | |
818 | struct cifs_ses *ses; | |
819 | struct nls_table *nls_cp; | |
820 | void (*func)(struct sess_data *); | |
821 | int result; | |
822 | ||
823 | /* we will send the SMB in three pieces: | |
824 | * a fixed length beginning part, an optional | |
825 | * SPNEGO blob (which can be zero length), and a | |
826 | * last part which will include the strings | |
827 | * and rest of bcc area. This allows us to avoid | |
828 | * a large buffer 17K allocation | |
829 | */ | |
830 | int buf0_type; | |
831 | struct kvec iov[3]; | |
832 | }; | |
833 | ||
834 | static int | |
835 | sess_alloc_buffer(struct sess_data *sess_data, int wct) | |
836 | { | |
837 | int rc; | |
838 | struct cifs_ses *ses = sess_data->ses; | |
839 | struct smb_hdr *smb_buf; | |
840 | ||
841 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
842 | (void **)&smb_buf); | |
843 | ||
844 | if (rc) | |
845 | return rc; | |
846 | ||
847 | sess_data->iov[0].iov_base = (char *)smb_buf; | |
848 | sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; | |
849 | /* | |
850 | * This variable will be used to clear the buffer | |
851 | * allocated above in case of any error in the calling function. | |
852 | */ | |
853 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
854 | ||
855 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
856 | sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL); | |
857 | if (!sess_data->iov[2].iov_base) { | |
858 | rc = -ENOMEM; | |
859 | goto out_free_smb_buf; | |
860 | } | |
861 | ||
862 | return 0; | |
863 | ||
864 | out_free_smb_buf: | |
865 | kfree(smb_buf); | |
866 | sess_data->iov[0].iov_base = NULL; | |
867 | sess_data->iov[0].iov_len = 0; | |
868 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
869 | return rc; | |
870 | } | |
871 | ||
872 | static void | |
873 | sess_free_buffer(struct sess_data *sess_data) | |
874 | { | |
875 | ||
876 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
877 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
878 | kfree(sess_data->iov[2].iov_base); | |
879 | } | |
880 | ||
881 | static int | |
882 | sess_establish_session(struct sess_data *sess_data) | |
883 | { | |
884 | struct cifs_ses *ses = sess_data->ses; | |
885 | ||
886 | mutex_lock(&ses->server->srv_mutex); | |
887 | if (!ses->server->session_estab) { | |
888 | if (ses->server->sign) { | |
889 | ses->server->session_key.response = | |
890 | kmemdup(ses->auth_key.response, | |
891 | ses->auth_key.len, GFP_KERNEL); | |
892 | if (!ses->server->session_key.response) { | |
893 | mutex_unlock(&ses->server->srv_mutex); | |
894 | return -ENOMEM; | |
895 | } | |
896 | ses->server->session_key.len = | |
897 | ses->auth_key.len; | |
898 | } | |
899 | ses->server->sequence_number = 0x2; | |
900 | ses->server->session_estab = true; | |
901 | } | |
902 | mutex_unlock(&ses->server->srv_mutex); | |
903 | ||
904 | cifs_dbg(FYI, "CIFS session established successfully\n"); | |
905 | spin_lock(&GlobalMid_Lock); | |
906 | ses->status = CifsGood; | |
907 | ses->need_reconnect = false; | |
908 | spin_unlock(&GlobalMid_Lock); | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | static int | |
914 | sess_sendreceive(struct sess_data *sess_data) | |
915 | { | |
916 | int rc; | |
917 | struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base; | |
918 | __u16 count; | |
da502f7d | 919 | struct kvec rsp_iov = { NULL, 0 }; |
80a0e637 SP |
920 | |
921 | count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len; | |
922 | smb_buf->smb_buf_length = | |
923 | cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count); | |
924 | put_bcc(count, smb_buf); | |
925 | ||
926 | rc = SendReceive2(sess_data->xid, sess_data->ses, | |
927 | sess_data->iov, 3 /* num_iovecs */, | |
928 | &sess_data->buf0_type, | |
da502f7d PS |
929 | CIFS_LOG_ERROR, &rsp_iov); |
930 | cifs_small_buf_release(sess_data->iov[0].iov_base); | |
931 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
80a0e637 SP |
932 | |
933 | return rc; | |
934 | } | |
935 | ||
936 | /* | |
937 | * LANMAN and plaintext are less secure and off by default. | |
938 | * So we make this explicitly be turned on in kconfig (in the | |
939 | * build) and turned on at runtime (changed from the default) | |
940 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
941 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 | |
942 | */ | |
943 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
944 | static void | |
945 | sess_auth_lanman(struct sess_data *sess_data) | |
946 | { | |
947 | int rc = 0; | |
948 | struct smb_hdr *smb_buf; | |
949 | SESSION_SETUP_ANDX *pSMB; | |
950 | char *bcc_ptr; | |
951 | struct cifs_ses *ses = sess_data->ses; | |
952 | char lnm_session_key[CIFS_AUTH_RESP_SIZE]; | |
80a0e637 SP |
953 | __u16 bytes_remaining; |
954 | ||
955 | /* lanman 2 style sessionsetup */ | |
956 | /* wct = 10 */ | |
957 | rc = sess_alloc_buffer(sess_data, 10); | |
958 | if (rc) | |
959 | goto out; | |
960 | ||
961 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
962 | bcc_ptr = sess_data->iov[2].iov_base; | |
8559ad8e | 963 | (void)cifs_ssetup_hdr(ses, pSMB); |
80a0e637 SP |
964 | |
965 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; | |
966 | ||
fa8f3a35 SM |
967 | if (ses->user_name != NULL) { |
968 | /* no capabilities flags in old lanman negotiation */ | |
969 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
80a0e637 | 970 | |
fa8f3a35 SM |
971 | /* Calculate hash with password and copy into bcc_ptr. |
972 | * Encryption Key (stored as in cryptkey) gets used if the | |
973 | * security mode bit in Negottiate Protocol response states | |
974 | * to use challenge/response method (i.e. Password bit is 1). | |
975 | */ | |
976 | rc = calc_lanman_hash(ses->password, ses->server->cryptkey, | |
977 | ses->server->sec_mode & SECMODE_PW_ENCRYPT ? | |
978 | true : false, lnm_session_key); | |
a6b6befb LB |
979 | if (rc) |
980 | goto out; | |
80a0e637 | 981 | |
fa8f3a35 SM |
982 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); |
983 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
984 | } else { | |
985 | pSMB->old_req.PasswordLength = 0; | |
986 | } | |
80a0e637 SP |
987 | |
988 | /* | |
989 | * can not sign if LANMAN negotiated so no need | |
990 | * to calculate signing key? but what if server | |
991 | * changed to do higher than lanman dialect and | |
992 | * we reconnected would we ever calc signing_key? | |
993 | */ | |
994 | ||
995 | cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n"); | |
996 | /* Unicode not allowed for LANMAN dialects */ | |
997 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
998 | ||
999 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1000 | (long) sess_data->iov[2].iov_base; | |
1001 | ||
1002 | rc = sess_sendreceive(sess_data); | |
1003 | if (rc) | |
1004 | goto out; | |
1005 | ||
1006 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1007 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1008 | ||
1009 | /* lanman response has a word count of 3 */ | |
1010 | if (smb_buf->WordCount != 3) { | |
1011 | rc = -EIO; | |
1012 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1013 | goto out; | |
1014 | } | |
1015 | ||
1016 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1017 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1018 | ||
1019 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1020 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1021 | ||
1022 | bytes_remaining = get_bcc(smb_buf); | |
1023 | bcc_ptr = pByteArea(smb_buf); | |
1024 | ||
1025 | /* BB check if Unicode and decode strings */ | |
1026 | if (bytes_remaining == 0) { | |
1027 | /* no string area to decode, do nothing */ | |
1028 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1029 | /* unicode string area must be word-aligned */ | |
1030 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1031 | ++bcc_ptr; | |
1032 | --bytes_remaining; | |
1033 | } | |
1034 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1035 | sess_data->nls_cp); | |
1036 | } else { | |
1037 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1038 | sess_data->nls_cp); | |
1039 | } | |
1040 | ||
1041 | rc = sess_establish_session(sess_data); | |
1042 | out: | |
1043 | sess_data->result = rc; | |
1044 | sess_data->func = NULL; | |
1045 | sess_free_buffer(sess_data); | |
1046 | } | |
1047 | ||
80a0e637 SP |
1048 | #endif |
1049 | ||
583cf7af SP |
1050 | static void |
1051 | sess_auth_ntlm(struct sess_data *sess_data) | |
1052 | { | |
1053 | int rc = 0; | |
1054 | struct smb_hdr *smb_buf; | |
1055 | SESSION_SETUP_ANDX *pSMB; | |
1056 | char *bcc_ptr; | |
1057 | struct cifs_ses *ses = sess_data->ses; | |
1058 | __u32 capabilities; | |
1059 | __u16 bytes_remaining; | |
1060 | ||
1061 | /* old style NTLM sessionsetup */ | |
1062 | /* wct = 13 */ | |
1063 | rc = sess_alloc_buffer(sess_data, 13); | |
1064 | if (rc) | |
1065 | goto out; | |
1066 | ||
1067 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1068 | bcc_ptr = sess_data->iov[2].iov_base; | |
1069 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1070 | ||
1071 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
777f69b8 SM |
1072 | if (ses->user_name != NULL) { |
1073 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
1074 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
1075 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
1076 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
1077 | ||
1078 | /* calculate ntlm response and session key */ | |
1079 | rc = setup_ntlm_response(ses, sess_data->nls_cp); | |
1080 | if (rc) { | |
1081 | cifs_dbg(VFS, "Error %d during NTLM authentication\n", | |
1082 | rc); | |
1083 | goto out; | |
1084 | } | |
583cf7af | 1085 | |
777f69b8 SM |
1086 | /* copy ntlm response */ |
1087 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
1088 | CIFS_AUTH_RESP_SIZE); | |
1089 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
1090 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
1091 | CIFS_AUTH_RESP_SIZE); | |
1092 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
1093 | } else { | |
1094 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
1095 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
1096 | } | |
583cf7af SP |
1097 | |
1098 | if (ses->capabilities & CAP_UNICODE) { | |
1099 | /* unicode strings must be word aligned */ | |
1100 | if (sess_data->iov[0].iov_len % 2) { | |
1101 | *bcc_ptr = 0; | |
1102 | bcc_ptr++; | |
1103 | } | |
1104 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1105 | } else { | |
1106 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1107 | } | |
1108 | ||
1109 | ||
1110 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1111 | (long) sess_data->iov[2].iov_base; | |
1112 | ||
1113 | rc = sess_sendreceive(sess_data); | |
1114 | if (rc) | |
1115 | goto out; | |
1116 | ||
1117 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1118 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1119 | ||
1120 | if (smb_buf->WordCount != 3) { | |
1121 | rc = -EIO; | |
1122 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1123 | goto out; | |
1124 | } | |
1125 | ||
1126 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1127 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1128 | ||
1129 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1130 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1131 | ||
1132 | bytes_remaining = get_bcc(smb_buf); | |
1133 | bcc_ptr = pByteArea(smb_buf); | |
1134 | ||
1135 | /* BB check if Unicode and decode strings */ | |
1136 | if (bytes_remaining == 0) { | |
1137 | /* no string area to decode, do nothing */ | |
1138 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1139 | /* unicode string area must be word-aligned */ | |
1140 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1141 | ++bcc_ptr; | |
1142 | --bytes_remaining; | |
1143 | } | |
1144 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1145 | sess_data->nls_cp); | |
1146 | } else { | |
1147 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1148 | sess_data->nls_cp); | |
1149 | } | |
1150 | ||
1151 | rc = sess_establish_session(sess_data); | |
1152 | out: | |
1153 | sess_data->result = rc; | |
1154 | sess_data->func = NULL; | |
1155 | sess_free_buffer(sess_data); | |
1156 | kfree(ses->auth_key.response); | |
1157 | ses->auth_key.response = NULL; | |
1158 | } | |
1159 | ||
1160 | static void | |
1161 | sess_auth_ntlmv2(struct sess_data *sess_data) | |
1162 | { | |
1163 | int rc = 0; | |
1164 | struct smb_hdr *smb_buf; | |
1165 | SESSION_SETUP_ANDX *pSMB; | |
1166 | char *bcc_ptr; | |
1167 | struct cifs_ses *ses = sess_data->ses; | |
1168 | __u32 capabilities; | |
1169 | __u16 bytes_remaining; | |
1170 | ||
1171 | /* old style NTLM sessionsetup */ | |
1172 | /* wct = 13 */ | |
1173 | rc = sess_alloc_buffer(sess_data, 13); | |
1174 | if (rc) | |
1175 | goto out; | |
1176 | ||
1177 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1178 | bcc_ptr = sess_data->iov[2].iov_base; | |
1179 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1180 | ||
1181 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
1182 | ||
1183 | /* LM2 password would be here if we supported it */ | |
1184 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
1185 | ||
1a967d6c SM |
1186 | if (ses->user_name != NULL) { |
1187 | /* calculate nlmv2 response and session key */ | |
1188 | rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp); | |
1189 | if (rc) { | |
1190 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc); | |
1191 | goto out; | |
1192 | } | |
583cf7af | 1193 | |
1a967d6c SM |
1194 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
1195 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1196 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
583cf7af | 1197 | |
1a967d6c SM |
1198 | /* set case sensitive password length after tilen may get |
1199 | * assigned, tilen is 0 otherwise. | |
1200 | */ | |
1201 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
1202 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1203 | } else { | |
1204 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
1205 | } | |
583cf7af SP |
1206 | |
1207 | if (ses->capabilities & CAP_UNICODE) { | |
1208 | if (sess_data->iov[0].iov_len % 2) { | |
1209 | *bcc_ptr = 0; | |
1210 | bcc_ptr++; | |
1211 | } | |
1212 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1213 | } else { | |
1214 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1215 | } | |
1216 | ||
1217 | ||
1218 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1219 | (long) sess_data->iov[2].iov_base; | |
1220 | ||
1221 | rc = sess_sendreceive(sess_data); | |
1222 | if (rc) | |
1223 | goto out; | |
1224 | ||
1225 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1226 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1227 | ||
1228 | if (smb_buf->WordCount != 3) { | |
1229 | rc = -EIO; | |
1230 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1231 | goto out; | |
1232 | } | |
1233 | ||
1234 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1235 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1236 | ||
1237 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1238 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1239 | ||
1240 | bytes_remaining = get_bcc(smb_buf); | |
1241 | bcc_ptr = pByteArea(smb_buf); | |
1242 | ||
1243 | /* BB check if Unicode and decode strings */ | |
1244 | if (bytes_remaining == 0) { | |
1245 | /* no string area to decode, do nothing */ | |
1246 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1247 | /* unicode string area must be word-aligned */ | |
1248 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1249 | ++bcc_ptr; | |
1250 | --bytes_remaining; | |
1251 | } | |
1252 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1253 | sess_data->nls_cp); | |
1254 | } else { | |
1255 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1256 | sess_data->nls_cp); | |
1257 | } | |
1258 | ||
1259 | rc = sess_establish_session(sess_data); | |
1260 | out: | |
1261 | sess_data->result = rc; | |
1262 | sess_data->func = NULL; | |
1263 | sess_free_buffer(sess_data); | |
1264 | kfree(ses->auth_key.response); | |
1265 | ses->auth_key.response = NULL; | |
1266 | } | |
1267 | ||
ee03c646 SP |
1268 | #ifdef CONFIG_CIFS_UPCALL |
1269 | static void | |
1270 | sess_auth_kerberos(struct sess_data *sess_data) | |
1271 | { | |
1272 | int rc = 0; | |
1273 | struct smb_hdr *smb_buf; | |
1274 | SESSION_SETUP_ANDX *pSMB; | |
1275 | char *bcc_ptr; | |
1276 | struct cifs_ses *ses = sess_data->ses; | |
1277 | __u32 capabilities; | |
1278 | __u16 bytes_remaining; | |
1279 | struct key *spnego_key = NULL; | |
1280 | struct cifs_spnego_msg *msg; | |
1281 | u16 blob_len; | |
1282 | ||
1283 | /* extended security */ | |
1284 | /* wct = 12 */ | |
1285 | rc = sess_alloc_buffer(sess_data, 12); | |
1286 | if (rc) | |
1287 | goto out; | |
1288 | ||
1289 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1290 | bcc_ptr = sess_data->iov[2].iov_base; | |
1291 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1292 | ||
1293 | spnego_key = cifs_get_spnego_key(ses); | |
1294 | if (IS_ERR(spnego_key)) { | |
1295 | rc = PTR_ERR(spnego_key); | |
1296 | spnego_key = NULL; | |
1297 | goto out; | |
1298 | } | |
1299 | ||
146aa8b1 | 1300 | msg = spnego_key->payload.data[0]; |
ee03c646 SP |
1301 | /* |
1302 | * check version field to make sure that cifs.upcall is | |
1303 | * sending us a response in an expected form | |
1304 | */ | |
1305 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
1306 | cifs_dbg(VFS, | |
1307 | "incorrect version of cifs.upcall (expected %d but got %d)", | |
1308 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
1309 | rc = -EKEYREJECTED; | |
1310 | goto out_put_spnego_key; | |
1311 | } | |
1312 | ||
1313 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
1314 | GFP_KERNEL); | |
1315 | if (!ses->auth_key.response) { | |
1316 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory", | |
1317 | msg->sesskey_len); | |
1318 | rc = -ENOMEM; | |
1319 | goto out_put_spnego_key; | |
1320 | } | |
1321 | ses->auth_key.len = msg->sesskey_len; | |
1322 | ||
1323 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
1324 | capabilities |= CAP_EXTENDED_SECURITY; | |
1325 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
1326 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1327 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1328 | pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len); | |
1329 | ||
1330 | if (ses->capabilities & CAP_UNICODE) { | |
1331 | /* unicode strings must be word aligned */ | |
1332 | if ((sess_data->iov[0].iov_len | |
1333 | + sess_data->iov[1].iov_len) % 2) { | |
1334 | *bcc_ptr = 0; | |
1335 | bcc_ptr++; | |
1336 | } | |
1337 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); | |
1338 | unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp); | |
1339 | } else { | |
1340 | /* BB: is this right? */ | |
1341 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1342 | } | |
1343 | ||
1344 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1345 | (long) sess_data->iov[2].iov_base; | |
1346 | ||
1347 | rc = sess_sendreceive(sess_data); | |
1348 | if (rc) | |
1349 | goto out_put_spnego_key; | |
1350 | ||
1351 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1352 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1353 | ||
1354 | if (smb_buf->WordCount != 4) { | |
1355 | rc = -EIO; | |
1356 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1357 | goto out_put_spnego_key; | |
1358 | } | |
1359 | ||
1360 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1361 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1362 | ||
1363 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1364 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1365 | ||
1366 | bytes_remaining = get_bcc(smb_buf); | |
1367 | bcc_ptr = pByteArea(smb_buf); | |
1368 | ||
1369 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
1370 | if (blob_len > bytes_remaining) { | |
1371 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1372 | blob_len); | |
1373 | rc = -EINVAL; | |
1374 | goto out_put_spnego_key; | |
1375 | } | |
1376 | bcc_ptr += blob_len; | |
1377 | bytes_remaining -= blob_len; | |
1378 | ||
1379 | /* BB check if Unicode and decode strings */ | |
1380 | if (bytes_remaining == 0) { | |
1381 | /* no string area to decode, do nothing */ | |
1382 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1383 | /* unicode string area must be word-aligned */ | |
1384 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1385 | ++bcc_ptr; | |
1386 | --bytes_remaining; | |
1387 | } | |
1388 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1389 | sess_data->nls_cp); | |
1390 | } else { | |
1391 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1392 | sess_data->nls_cp); | |
1393 | } | |
1394 | ||
1395 | rc = sess_establish_session(sess_data); | |
1396 | out_put_spnego_key: | |
1397 | key_invalidate(spnego_key); | |
1398 | key_put(spnego_key); | |
1399 | out: | |
1400 | sess_data->result = rc; | |
1401 | sess_data->func = NULL; | |
1402 | sess_free_buffer(sess_data); | |
1403 | kfree(ses->auth_key.response); | |
1404 | ses->auth_key.response = NULL; | |
1405 | } | |
1406 | ||
ee03c646 | 1407 | #endif /* ! CONFIG_CIFS_UPCALL */ |
583cf7af | 1408 | |
cc87c47d SP |
1409 | /* |
1410 | * The required kvec buffers have to be allocated before calling this | |
1411 | * function. | |
1412 | */ | |
1413 | static int | |
1414 | _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data) | |
3979877e | 1415 | { |
3979877e | 1416 | SESSION_SETUP_ANDX *pSMB; |
cc87c47d | 1417 | struct cifs_ses *ses = sess_data->ses; |
3979877e | 1418 | __u32 capabilities; |
cc87c47d | 1419 | char *bcc_ptr; |
254e55ed | 1420 | |
cc87c47d | 1421 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
cc87c47d SP |
1422 | |
1423 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1424 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { | |
1425 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); | |
1426 | return -ENOSYS; | |
3534b850 | 1427 | } |
3979877e | 1428 | |
cc87c47d SP |
1429 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
1430 | capabilities |= CAP_EXTENDED_SECURITY; | |
1431 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
80a0e637 | 1432 | |
cc87c47d SP |
1433 | bcc_ptr = sess_data->iov[2].iov_base; |
1434 | /* unicode strings must be word aligned */ | |
1435 | if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) { | |
1436 | *bcc_ptr = 0; | |
1437 | bcc_ptr++; | |
3f618223 | 1438 | } |
cc87c47d | 1439 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); |
3f618223 | 1440 | |
cc87c47d SP |
1441 | sess_data->iov[2].iov_len = (long) bcc_ptr - |
1442 | (long) sess_data->iov[2].iov_base; | |
80a0e637 | 1443 | |
cc87c47d SP |
1444 | return 0; |
1445 | } | |
1446 | ||
1447 | static void | |
1448 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data); | |
1449 | ||
1450 | static void | |
1451 | sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data) | |
1452 | { | |
1453 | int rc; | |
1454 | struct smb_hdr *smb_buf; | |
1455 | SESSION_SETUP_ANDX *pSMB; | |
1456 | struct cifs_ses *ses = sess_data->ses; | |
1457 | __u16 bytes_remaining; | |
1458 | char *bcc_ptr; | |
1459 | u16 blob_len; | |
1460 | ||
1461 | cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n"); | |
5c234aa5 | 1462 | |
cc87c47d SP |
1463 | /* |
1464 | * if memory allocation is successful, caller of this function | |
1465 | * frees it. | |
1466 | */ | |
1467 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
1468 | if (!ses->ntlmssp) { | |
1469 | rc = -ENOMEM; | |
1470 | goto out; | |
d3686d54 | 1471 | } |
cc87c47d | 1472 | ses->ntlmssp->sesskey_per_smbsess = false; |
d3686d54 | 1473 | |
cc87c47d SP |
1474 | /* wct = 12 */ |
1475 | rc = sess_alloc_buffer(sess_data, 12); | |
1476 | if (rc) | |
1477 | goto out; | |
0b3cc858 | 1478 | |
cc87c47d | 1479 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
3979877e | 1480 | |
cc87c47d SP |
1481 | /* Build security blob before we assemble the request */ |
1482 | build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses); | |
1483 | sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
1484 | sess_data->iov[1].iov_base = pSMB->req.SecurityBlob; | |
1485 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
1486 | ||
1487 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
790fe579 | 1488 | if (rc) |
cc87c47d | 1489 | goto out; |
3979877e | 1490 | |
cc87c47d | 1491 | rc = sess_sendreceive(sess_data); |
3979877e | 1492 | |
cc87c47d SP |
1493 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1494 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
750d1151 | 1495 | |
cc87c47d SP |
1496 | /* If true, rc here is expected and not an error */ |
1497 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
1498 | smb_buf->Status.CifsError == | |
1499 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)) | |
1500 | rc = 0; | |
2442421b | 1501 | |
cc87c47d SP |
1502 | if (rc) |
1503 | goto out; | |
1504 | ||
1505 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); | |
1506 | ||
1507 | if (smb_buf->WordCount != 4) { | |
1508 | rc = -EIO; | |
1509 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1510 | goto out; | |
5e6e6232 | 1511 | } |
3979877e | 1512 | |
cc87c47d SP |
1513 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
1514 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
2442421b | 1515 | |
cc87c47d SP |
1516 | bytes_remaining = get_bcc(smb_buf); |
1517 | bcc_ptr = pByteArea(smb_buf); | |
b4d6fcf1 | 1518 | |
cc87c47d SP |
1519 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1520 | if (blob_len > bytes_remaining) { | |
1521 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1522 | blob_len); | |
1523 | rc = -EINVAL; | |
1524 | goto out; | |
1525 | } | |
0b3cc858 | 1526 | |
cc87c47d SP |
1527 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); |
1528 | out: | |
1529 | sess_free_buffer(sess_data); | |
1530 | ||
1531 | if (!rc) { | |
1532 | sess_data->func = sess_auth_rawntlmssp_authenticate; | |
1533 | return; | |
3979877e SF |
1534 | } |
1535 | ||
cc87c47d SP |
1536 | /* Else error. Cleanup */ |
1537 | kfree(ses->auth_key.response); | |
1538 | ses->auth_key.response = NULL; | |
1539 | kfree(ses->ntlmssp); | |
1540 | ses->ntlmssp = NULL; | |
2442421b | 1541 | |
cc87c47d SP |
1542 | sess_data->func = NULL; |
1543 | sess_data->result = rc; | |
1544 | } | |
3979877e | 1545 | |
cc87c47d SP |
1546 | static void |
1547 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data) | |
1548 | { | |
1549 | int rc; | |
1550 | struct smb_hdr *smb_buf; | |
1551 | SESSION_SETUP_ANDX *pSMB; | |
1552 | struct cifs_ses *ses = sess_data->ses; | |
1553 | __u16 bytes_remaining; | |
1554 | char *bcc_ptr; | |
b8da344b | 1555 | unsigned char *ntlmsspblob = NULL; |
cc87c47d | 1556 | u16 blob_len; |
3979877e | 1557 | |
cc87c47d | 1558 | cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n"); |
3979877e | 1559 | |
cc87c47d SP |
1560 | /* wct = 12 */ |
1561 | rc = sess_alloc_buffer(sess_data, 12); | |
1562 | if (rc) | |
1563 | goto out; | |
3979877e | 1564 | |
cc87c47d SP |
1565 | /* Build security blob before we assemble the request */ |
1566 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1567 | smb_buf = (struct smb_hdr *)pSMB; | |
b8da344b | 1568 | rc = build_ntlmssp_auth_blob(&ntlmsspblob, |
cc87c47d SP |
1569 | &blob_len, ses, sess_data->nls_cp); |
1570 | if (rc) | |
1571 | goto out_free_ntlmsspblob; | |
1572 | sess_data->iov[1].iov_len = blob_len; | |
1573 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1574 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
1575 | /* | |
1576 | * Make sure that we tell the server that we are using | |
1577 | * the uid that it just gave us back on the response | |
1578 | * (challenge) | |
1579 | */ | |
1580 | smb_buf->Uid = ses->Suid; | |
1581 | ||
1582 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
0b3cc858 | 1583 | if (rc) |
cc87c47d | 1584 | goto out_free_ntlmsspblob; |
0b3cc858 | 1585 | |
cc87c47d SP |
1586 | rc = sess_sendreceive(sess_data); |
1587 | if (rc) | |
1588 | goto out_free_ntlmsspblob; | |
1589 | ||
1590 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1591 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
583cf7af | 1592 | if (smb_buf->WordCount != 4) { |
3979877e | 1593 | rc = -EIO; |
f96637be | 1594 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
cc87c47d | 1595 | goto out_free_ntlmsspblob; |
3979877e | 1596 | } |
cc87c47d SP |
1597 | |
1598 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
f96637be | 1599 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
cc87c47d | 1600 | |
ee9bbf46 SP |
1601 | if (ses->Suid != smb_buf->Uid) { |
1602 | ses->Suid = smb_buf->Uid; | |
1603 | cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid); | |
1604 | } | |
1605 | ||
690c522f | 1606 | bytes_remaining = get_bcc(smb_buf); |
3979877e | 1607 | bcc_ptr = pByteArea(smb_buf); |
583cf7af SP |
1608 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1609 | if (blob_len > bytes_remaining) { | |
1610 | cifs_dbg(VFS, "bad security blob length %d\n", | |
cc87c47d | 1611 | blob_len); |
583cf7af | 1612 | rc = -EINVAL; |
cc87c47d | 1613 | goto out_free_ntlmsspblob; |
790fe579 | 1614 | } |
583cf7af SP |
1615 | bcc_ptr += blob_len; |
1616 | bytes_remaining -= blob_len; | |
3979877e | 1617 | |
cc87c47d | 1618 | |
3979877e | 1619 | /* BB check if Unicode and decode strings */ |
fcda7f45 JL |
1620 | if (bytes_remaining == 0) { |
1621 | /* no string area to decode, do nothing */ | |
1622 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 JL |
1623 | /* unicode string area must be word-aligned */ |
1624 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1625 | ++bcc_ptr; | |
1626 | --bytes_remaining; | |
1627 | } | |
cc87c47d SP |
1628 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, |
1629 | sess_data->nls_cp); | |
27b87fe5 | 1630 | } else { |
cc87c47d SP |
1631 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, |
1632 | sess_data->nls_cp); | |
27b87fe5 | 1633 | } |
50c2f753 | 1634 | |
cc87c47d | 1635 | out_free_ntlmsspblob: |
2b149f11 | 1636 | kfree(ntlmsspblob); |
cc87c47d SP |
1637 | out: |
1638 | sess_free_buffer(sess_data); | |
d4e63bd6 | 1639 | |
cc87c47d SP |
1640 | if (!rc) |
1641 | rc = sess_establish_session(sess_data); | |
d4e63bd6 | 1642 | |
cc87c47d | 1643 | /* Cleanup */ |
d4e63bd6 SP |
1644 | kfree(ses->auth_key.response); |
1645 | ses->auth_key.response = NULL; | |
1646 | kfree(ses->ntlmssp); | |
cc87c47d | 1647 | ses->ntlmssp = NULL; |
d4e63bd6 | 1648 | |
cc87c47d SP |
1649 | sess_data->func = NULL; |
1650 | sess_data->result = rc; | |
1651 | } | |
80a0e637 | 1652 | |
27924075 | 1653 | static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data) |
cc87c47d SP |
1654 | { |
1655 | int type; | |
1656 | ||
ef65aaed | 1657 | type = cifs_select_sectype(ses->server, ses->sectype); |
cc87c47d SP |
1658 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1659 | if (type == Unspecified) { | |
1660 | cifs_dbg(VFS, | |
1661 | "Unable to select appropriate authentication method!"); | |
1662 | return -EINVAL; | |
1663 | } | |
1664 | ||
1665 | switch (type) { | |
1666 | case LANMAN: | |
1667 | /* LANMAN and plaintext are less secure and off by default. | |
1668 | * So we make this explicitly be turned on in kconfig (in the | |
1669 | * build) and turned on at runtime (changed from the default) | |
1670 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
1671 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
1672 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1673 | sess_data->func = sess_auth_lanman; | |
1674 | break; | |
1675 | #else | |
1676 | return -EOPNOTSUPP; | |
1677 | #endif | |
1678 | case NTLM: | |
1679 | sess_data->func = sess_auth_ntlm; | |
1680 | break; | |
1681 | case NTLMv2: | |
1682 | sess_data->func = sess_auth_ntlmv2; | |
1683 | break; | |
1684 | case Kerberos: | |
1685 | #ifdef CONFIG_CIFS_UPCALL | |
1686 | sess_data->func = sess_auth_kerberos; | |
1687 | break; | |
1688 | #else | |
1689 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1690 | return -ENOSYS; | |
1691 | break; | |
1692 | #endif /* CONFIG_CIFS_UPCALL */ | |
1693 | case RawNTLMSSP: | |
1694 | sess_data->func = sess_auth_rawntlmssp_negotiate; | |
1695 | break; | |
1696 | default: | |
1697 | cifs_dbg(VFS, "secType %d not supported!\n", type); | |
1698 | return -ENOSYS; | |
1699 | } | |
1700 | ||
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, | |
1705 | const struct nls_table *nls_cp) | |
1706 | { | |
1707 | int rc = 0; | |
1708 | struct sess_data *sess_data; | |
1709 | ||
1710 | if (ses == NULL) { | |
1711 | WARN(1, "%s: ses == NULL!", __func__); | |
1712 | return -EINVAL; | |
1713 | } | |
1714 | ||
1715 | sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL); | |
1716 | if (!sess_data) | |
1717 | return -ENOMEM; | |
1718 | ||
1719 | rc = select_sec(ses, sess_data); | |
1720 | if (rc) | |
1721 | goto out; | |
1722 | ||
1723 | sess_data->xid = xid; | |
1724 | sess_data->ses = ses; | |
1725 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1726 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
1727 | ||
1728 | while (sess_data->func) | |
1729 | sess_data->func(sess_data); | |
1730 | ||
1731 | /* Store result before we free sess_data */ | |
80a0e637 | 1732 | rc = sess_data->result; |
cc87c47d SP |
1733 | |
1734 | out: | |
80a0e637 SP |
1735 | kfree(sess_data); |
1736 | return rc; | |
3979877e | 1737 | } |