Commit | Line | Data |
---|---|---|
3979877e SF |
1 | /* |
2 | * fs/cifs/sess.c | |
3 | * | |
4 | * SMB/CIFS session setup handling routines | |
5 | * | |
790fe579 | 6 | * Copyright (c) International Business Machines Corp., 2006, 2007 |
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> |
2442421b | 32 | #include "cifs_spnego.h" |
3979877e | 33 | |
3979877e | 34 | extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, |
790fe579 | 35 | unsigned char *p24); |
3979877e | 36 | |
eca6acf9 SF |
37 | /* Checks if this is the first smb session to be reconnected after |
38 | the socket has been reestablished (so we know whether to use vc 0). | |
39 | Called while holding the cifs_tcp_ses_lock, so do not block */ | |
40 | static bool is_first_ses_reconnect(struct cifsSesInfo *ses) | |
41 | { | |
42 | struct list_head *tmp; | |
43 | struct cifsSesInfo *tmp_ses; | |
44 | ||
45 | list_for_each(tmp, &ses->server->smb_ses_list) { | |
46 | tmp_ses = list_entry(tmp, struct cifsSesInfo, | |
47 | smb_ses_list); | |
48 | if (tmp_ses->need_reconnect == false) | |
49 | return false; | |
50 | } | |
51 | /* could not find a session that was already connected, | |
52 | this must be the first one we are reconnecting */ | |
53 | return true; | |
54 | } | |
55 | ||
56 | /* | |
57 | * vc number 0 is treated specially by some servers, and should be the | |
58 | * first one we request. After that we can use vcnumbers up to maxvcs, | |
59 | * one for each smb session (some Windows versions set maxvcs incorrectly | |
60 | * so maxvc=1 can be ignored). If we have too many vcs, we can reuse | |
61 | * any vc but zero (some servers reset the connection on vcnum zero) | |
62 | * | |
63 | */ | |
64 | static __le16 get_next_vcnum(struct cifsSesInfo *ses) | |
65 | { | |
66 | __u16 vcnum = 0; | |
67 | struct list_head *tmp; | |
68 | struct cifsSesInfo *tmp_ses; | |
69 | __u16 max_vcs = ses->server->max_vcs; | |
70 | __u16 i; | |
71 | int free_vc_found = 0; | |
72 | ||
73 | /* Quoting the MS-SMB specification: "Windows-based SMB servers set this | |
74 | field to one but do not enforce this limit, which allows an SMB client | |
75 | to establish more virtual circuits than allowed by this value ... but | |
76 | other server implementations can enforce this limit." */ | |
77 | if (max_vcs < 2) | |
78 | max_vcs = 0xFFFF; | |
79 | ||
80 | write_lock(&cifs_tcp_ses_lock); | |
81 | if ((ses->need_reconnect) && is_first_ses_reconnect(ses)) | |
82 | goto get_vc_num_exit; /* vcnum will be zero */ | |
83 | for (i = ses->server->srv_count - 1; i < max_vcs; i++) { | |
84 | if (i == 0) /* this is the only connection, use vc 0 */ | |
85 | break; | |
86 | ||
87 | free_vc_found = 1; | |
88 | ||
89 | list_for_each(tmp, &ses->server->smb_ses_list) { | |
90 | tmp_ses = list_entry(tmp, struct cifsSesInfo, | |
91 | smb_ses_list); | |
92 | if (tmp_ses->vcnum == i) { | |
93 | free_vc_found = 0; | |
94 | break; /* found duplicate, try next vcnum */ | |
95 | } | |
96 | } | |
97 | if (free_vc_found) | |
98 | break; /* we found a vcnumber that will work - use it */ | |
99 | } | |
100 | ||
101 | if (i == 0) | |
102 | vcnum = 0; /* for most common case, ie if one smb session, use | |
103 | vc zero. Also for case when no free vcnum, zero | |
104 | is safest to send (some clients only send zero) */ | |
105 | else if (free_vc_found == 0) | |
106 | vcnum = 1; /* we can not reuse vc=0 safely, since some servers | |
107 | reset all uids on that, but 1 is ok. */ | |
108 | else | |
109 | vcnum = i; | |
110 | ses->vcnum = vcnum; | |
111 | get_vc_num_exit: | |
112 | write_unlock(&cifs_tcp_ses_lock); | |
113 | ||
114 | return le16_to_cpu(vcnum); | |
115 | } | |
116 | ||
3979877e SF |
117 | static __u32 cifs_ssetup_hdr(struct cifsSesInfo *ses, SESSION_SETUP_ANDX *pSMB) |
118 | { | |
119 | __u32 capabilities = 0; | |
120 | ||
121 | /* init fields common to all four types of SessSetup */ | |
eca6acf9 SF |
122 | /* Note that offsets for first seven fields in req struct are same */ |
123 | /* in CIFS Specs so does not matter which of 3 forms of struct */ | |
124 | /* that we use in next few lines */ | |
125 | /* Note that header is initialized to zero in header_assemble */ | |
3979877e SF |
126 | pSMB->req.AndXCommand = 0xFF; |
127 | pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf); | |
128 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); | |
eca6acf9 | 129 | pSMB->req.VcNumber = get_next_vcnum(ses); |
3979877e SF |
130 | |
131 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
132 | ||
790fe579 | 133 | /* BB verify whether signing required on neg or just on auth frame |
3979877e SF |
134 | (and NTLM case) */ |
135 | ||
136 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
137 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
138 | ||
790fe579 SF |
139 | if (ses->server->secMode & |
140 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
3979877e SF |
141 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
142 | ||
143 | if (ses->capabilities & CAP_UNICODE) { | |
144 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
145 | capabilities |= CAP_UNICODE; | |
146 | } | |
147 | if (ses->capabilities & CAP_STATUS32) { | |
148 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
149 | capabilities |= CAP_STATUS32; | |
150 | } | |
151 | if (ses->capabilities & CAP_DFS) { | |
152 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
153 | capabilities |= CAP_DFS; | |
154 | } | |
26f57364 | 155 | if (ses->capabilities & CAP_UNIX) |
3979877e | 156 | capabilities |= CAP_UNIX; |
3979877e | 157 | |
3979877e SF |
158 | return capabilities; |
159 | } | |
160 | ||
0d3a01fa JL |
161 | static void |
162 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
163 | { | |
164 | char *bcc_ptr = *pbcc_area; | |
165 | int bytes_ret = 0; | |
166 | ||
167 | /* Copy OS version */ | |
168 | bytes_ret = cifs_strtoUCS((__le16 *)bcc_ptr, "Linux version ", 32, | |
169 | nls_cp); | |
170 | bcc_ptr += 2 * bytes_ret; | |
171 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, init_utsname()->release, | |
172 | 32, nls_cp); | |
173 | bcc_ptr += 2 * bytes_ret; | |
174 | bcc_ptr += 2; /* trailing null */ | |
175 | ||
176 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, | |
177 | 32, nls_cp); | |
178 | bcc_ptr += 2 * bytes_ret; | |
179 | bcc_ptr += 2; /* trailing null */ | |
180 | ||
181 | *pbcc_area = bcc_ptr; | |
182 | } | |
183 | ||
184 | static void unicode_domain_string(char **pbcc_area, struct cifsSesInfo *ses, | |
185 | const struct nls_table *nls_cp) | |
186 | { | |
187 | char *bcc_ptr = *pbcc_area; | |
188 | int bytes_ret = 0; | |
189 | ||
190 | /* copy domain */ | |
191 | if (ses->domainName == NULL) { | |
192 | /* Sending null domain better than using a bogus domain name (as | |
193 | we did briefly in 2.6.18) since server will use its default */ | |
194 | *bcc_ptr = 0; | |
195 | *(bcc_ptr+1) = 0; | |
196 | bytes_ret = 0; | |
197 | } else | |
198 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->domainName, | |
199 | 256, nls_cp); | |
200 | bcc_ptr += 2 * bytes_ret; | |
201 | bcc_ptr += 2; /* account for null terminator */ | |
202 | ||
203 | *pbcc_area = bcc_ptr; | |
204 | } | |
205 | ||
206 | ||
3870253e | 207 | static void unicode_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, |
790fe579 | 208 | const struct nls_table *nls_cp) |
3979877e | 209 | { |
790fe579 | 210 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
211 | int bytes_ret = 0; |
212 | ||
213 | /* BB FIXME add check that strings total less | |
214 | than 335 or will need to send them as arrays */ | |
215 | ||
0223cf0b SF |
216 | /* unicode strings, must be word aligned before the call */ |
217 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
218 | *bcc_ptr = 0; |
219 | bcc_ptr++; | |
0223cf0b | 220 | } */ |
3979877e | 221 | /* copy user */ |
790fe579 | 222 | if (ses->userName == NULL) { |
6e659c63 SF |
223 | /* null user mount */ |
224 | *bcc_ptr = 0; | |
225 | *(bcc_ptr+1) = 0; | |
3979877e SF |
226 | } else { /* 300 should be long enough for any conceivable user name */ |
227 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName, | |
228 | 300, nls_cp); | |
229 | } | |
230 | bcc_ptr += 2 * bytes_ret; | |
231 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 232 | |
0d3a01fa JL |
233 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
234 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
235 | |
236 | *pbcc_area = bcc_ptr; | |
237 | } | |
238 | ||
3870253e | 239 | static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, |
790fe579 | 240 | const struct nls_table *nls_cp) |
3979877e | 241 | { |
790fe579 | 242 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
243 | |
244 | /* copy user */ | |
245 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 SF |
246 | /* copy user */ |
247 | if (ses->userName == NULL) { | |
248 | /* BB what about null user mounts - check that we do this BB */ | |
249 | } else { /* 300 should be long enough for any conceivable user name */ | |
250 | strncpy(bcc_ptr, ses->userName, 300); | |
251 | } | |
3979877e | 252 | /* BB improve check for overflow */ |
790fe579 | 253 | bcc_ptr += strnlen(ses->userName, 300); |
3979877e | 254 | *bcc_ptr = 0; |
790fe579 | 255 | bcc_ptr++; /* account for null termination */ |
3979877e | 256 | |
790fe579 SF |
257 | /* copy domain */ |
258 | ||
259 | if (ses->domainName != NULL) { | |
260 | strncpy(bcc_ptr, ses->domainName, 256); | |
3979877e | 261 | bcc_ptr += strnlen(ses->domainName, 256); |
790fe579 | 262 | } /* else we will send a null domain name |
6e659c63 | 263 | so the server will default to its own domain */ |
3979877e SF |
264 | *bcc_ptr = 0; |
265 | bcc_ptr++; | |
266 | ||
267 | /* BB check for overflow here */ | |
268 | ||
269 | strcpy(bcc_ptr, "Linux version "); | |
270 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
271 | strcpy(bcc_ptr, init_utsname()->release); |
272 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
273 | |
274 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
275 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
276 | ||
790fe579 | 277 | *pbcc_area = bcc_ptr; |
3979877e SF |
278 | } |
279 | ||
790fe579 SF |
280 | static int decode_unicode_ssetup(char **pbcc_area, int bleft, |
281 | struct cifsSesInfo *ses, | |
282 | const struct nls_table *nls_cp) | |
3979877e SF |
283 | { |
284 | int rc = 0; | |
285 | int words_left, len; | |
790fe579 | 286 | char *data = *pbcc_area; |
3979877e SF |
287 | |
288 | ||
289 | ||
790fe579 | 290 | cFYI(1, ("bleft %d", bleft)); |
3979877e SF |
291 | |
292 | ||
8e6f195a SF |
293 | /* SMB header is unaligned, so cifs servers word align start of |
294 | Unicode strings */ | |
295 | data++; | |
296 | bleft--; /* Windows servers do not always double null terminate | |
297 | their final Unicode string - in which case we | |
298 | now will not attempt to decode the byte of junk | |
299 | which follows it */ | |
50c2f753 | 300 | |
3979877e SF |
301 | words_left = bleft / 2; |
302 | ||
303 | /* save off server operating system */ | |
304 | len = UniStrnlen((wchar_t *) data, words_left); | |
305 | ||
306 | /* We look for obvious messed up bcc or strings in response so we do not go off | |
307 | the end since (at least) WIN2K and Windows XP have a major bug in not null | |
308 | terminating last Unicode string in response */ | |
790fe579 | 309 | if (len >= words_left) |
3979877e SF |
310 | return rc; |
311 | ||
26f57364 | 312 | kfree(ses->serverOS); |
3979877e | 313 | /* UTF-8 string will not grow more than four times as big as UCS-16 */ |
69765529 | 314 | ses->serverOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL); |
26f57364 SF |
315 | if (ses->serverOS != NULL) |
316 | cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp); | |
3979877e SF |
317 | data += 2 * (len + 1); |
318 | words_left -= len + 1; | |
319 | ||
320 | /* save off server network operating system */ | |
321 | len = UniStrnlen((wchar_t *) data, words_left); | |
322 | ||
790fe579 | 323 | if (len >= words_left) |
3979877e SF |
324 | return rc; |
325 | ||
26f57364 | 326 | kfree(ses->serverNOS); |
69765529 | 327 | ses->serverNOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL); |
790fe579 | 328 | if (ses->serverNOS != NULL) { |
3979877e SF |
329 | cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len, |
330 | nls_cp); | |
790fe579 SF |
331 | if (strncmp(ses->serverNOS, "NT LAN Manager 4", 16) == 0) { |
332 | cFYI(1, ("NT4 server")); | |
3979877e SF |
333 | ses->flags |= CIFS_SES_NT4; |
334 | } | |
335 | } | |
336 | data += 2 * (len + 1); | |
337 | words_left -= len + 1; | |
338 | ||
790fe579 SF |
339 | /* save off server domain */ |
340 | len = UniStrnlen((wchar_t *) data, words_left); | |
341 | ||
342 | if (len > words_left) | |
343 | return rc; | |
344 | ||
26f57364 | 345 | kfree(ses->serverDomain); |
790fe579 SF |
346 | ses->serverDomain = kzalloc(2 * (len + 1), GFP_KERNEL); /* BB FIXME wrong length */ |
347 | if (ses->serverDomain != NULL) { | |
348 | cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len, | |
349 | nls_cp); | |
350 | ses->serverDomain[2*len] = 0; | |
351 | ses->serverDomain[(2*len) + 1] = 0; | |
352 | } | |
353 | data += 2 * (len + 1); | |
354 | words_left -= len + 1; | |
355 | ||
356 | cFYI(1, ("words left: %d", words_left)); | |
3979877e SF |
357 | |
358 | return rc; | |
359 | } | |
360 | ||
790fe579 SF |
361 | static int decode_ascii_ssetup(char **pbcc_area, int bleft, |
362 | struct cifsSesInfo *ses, | |
363 | const struct nls_table *nls_cp) | |
3979877e SF |
364 | { |
365 | int rc = 0; | |
366 | int len; | |
790fe579 | 367 | char *bcc_ptr = *pbcc_area; |
3979877e | 368 | |
790fe579 | 369 | cFYI(1, ("decode sessetup ascii. bleft %d", bleft)); |
50c2f753 | 370 | |
3979877e | 371 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 372 | if (len >= bleft) |
3979877e | 373 | return rc; |
50c2f753 | 374 | |
26f57364 | 375 | kfree(ses->serverOS); |
3979877e SF |
376 | |
377 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 378 | if (ses->serverOS) |
3979877e | 379 | strncpy(ses->serverOS, bcc_ptr, len); |
790fe579 SF |
380 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) { |
381 | cFYI(1, ("OS/2 server")); | |
9ac00b7d SF |
382 | ses->flags |= CIFS_SES_OS2; |
383 | } | |
3979877e SF |
384 | |
385 | bcc_ptr += len + 1; | |
386 | bleft -= len + 1; | |
387 | ||
388 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 389 | if (len >= bleft) |
3979877e SF |
390 | return rc; |
391 | ||
26f57364 | 392 | kfree(ses->serverNOS); |
3979877e SF |
393 | |
394 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 395 | if (ses->serverNOS) |
3979877e SF |
396 | strncpy(ses->serverNOS, bcc_ptr, len); |
397 | ||
398 | bcc_ptr += len + 1; | |
399 | bleft -= len + 1; | |
400 | ||
790fe579 SF |
401 | len = strnlen(bcc_ptr, bleft); |
402 | if (len > bleft) | |
403 | return rc; | |
3979877e | 404 | |
9ac00b7d SF |
405 | /* No domain field in LANMAN case. Domain is |
406 | returned by old servers in the SMB negprot response */ | |
407 | /* BB For newer servers which do not support Unicode, | |
408 | but thus do return domain here we could add parsing | |
409 | for it later, but it is not very important */ | |
790fe579 | 410 | cFYI(1, ("ascii: bytes left %d", bleft)); |
3979877e SF |
411 | |
412 | return rc; | |
413 | } | |
414 | ||
790fe579 | 415 | int |
3979877e SF |
416 | CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time, |
417 | const struct nls_table *nls_cp) | |
418 | { | |
419 | int rc = 0; | |
420 | int wct; | |
3979877e SF |
421 | struct smb_hdr *smb_buf; |
422 | char *bcc_ptr; | |
750d1151 | 423 | char *str_area; |
3979877e SF |
424 | SESSION_SETUP_ANDX *pSMB; |
425 | __u32 capabilities; | |
426 | int count; | |
2442421b SF |
427 | int resp_buf_type; |
428 | struct kvec iov[3]; | |
3979877e SF |
429 | enum securityEnum type; |
430 | __u16 action; | |
431 | int bytes_remaining; | |
2442421b | 432 | struct key *spnego_key = NULL; |
254e55ed | 433 | |
790fe579 | 434 | if (ses == NULL) |
3979877e SF |
435 | return -EINVAL; |
436 | ||
437 | type = ses->server->secType; | |
f40c5628 | 438 | |
790fe579 SF |
439 | cFYI(1, ("sess setup type %d", type)); |
440 | if (type == LANMAN) { | |
3979877e SF |
441 | #ifndef CONFIG_CIFS_WEAK_PW_HASH |
442 | /* LANMAN and plaintext are less secure and off by default. | |
443 | So we make this explicitly be turned on in kconfig (in the | |
444 | build) and turned on at runtime (changed from the default) | |
445 | in proc/fs/cifs or via mount parm. Unfortunately this is | |
446 | needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
447 | return -EOPNOTSUPP; | |
448 | #endif | |
449 | wct = 10; /* lanman 2 style sessionsetup */ | |
790fe579 | 450 | } else if ((type == NTLM) || (type == NTLMv2)) { |
9312f675 | 451 | /* For NTLMv2 failures eventually may need to retry NTLM */ |
3979877e | 452 | wct = 13; /* old style NTLM sessionsetup */ |
790fe579 | 453 | } else /* same size: negotiate or auth, NTLMSSP or extended security */ |
3979877e SF |
454 | wct = 12; |
455 | ||
456 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
457 | (void **)&smb_buf); | |
790fe579 | 458 | if (rc) |
3979877e SF |
459 | return rc; |
460 | ||
461 | pSMB = (SESSION_SETUP_ANDX *)smb_buf; | |
462 | ||
463 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
750d1151 | 464 | |
2442421b SF |
465 | /* we will send the SMB in three pieces: |
466 | a fixed length beginning part, an optional | |
467 | SPNEGO blob (which can be zero length), and a | |
468 | last part which will include the strings | |
469 | and rest of bcc area. This allows us to avoid | |
470 | a large buffer 17K allocation */ | |
790fe579 SF |
471 | iov[0].iov_base = (char *)pSMB; |
472 | iov[0].iov_len = smb_buf->smb_buf_length + 4; | |
750d1151 | 473 | |
2442421b SF |
474 | /* setting this here allows the code at the end of the function |
475 | to free the request buffer if there's an error */ | |
476 | resp_buf_type = CIFS_SMALL_BUFFER; | |
477 | ||
750d1151 SF |
478 | /* 2000 big enough to fit max user, domain, NOS name etc. */ |
479 | str_area = kmalloc(2000, GFP_KERNEL); | |
5e6e6232 | 480 | if (str_area == NULL) { |
2442421b SF |
481 | rc = -ENOMEM; |
482 | goto ssetup_exit; | |
5e6e6232 | 483 | } |
750d1151 | 484 | bcc_ptr = str_area; |
3979877e | 485 | |
9ac00b7d SF |
486 | ses->flags &= ~CIFS_SES_LANMAN; |
487 | ||
2442421b SF |
488 | iov[1].iov_base = NULL; |
489 | iov[1].iov_len = 0; | |
490 | ||
790fe579 | 491 | if (type == LANMAN) { |
3979877e | 492 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
7c7b25bc | 493 | char lnm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e | 494 | |
c76da9da SF |
495 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; |
496 | ||
3979877e SF |
497 | /* no capabilities flags in old lanman negotiation */ |
498 | ||
790fe579 | 499 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e SF |
500 | /* BB calculate hash with password */ |
501 | /* and copy into bcc */ | |
502 | ||
4e53a3fb JL |
503 | calc_lanman_hash(ses->password, ses->server->cryptKey, |
504 | ses->server->secMode & SECMODE_PW_ENCRYPT ? | |
505 | true : false, lnm_session_key); | |
506 | ||
790fe579 | 507 | ses->flags |= CIFS_SES_LANMAN; |
7c7b25bc SF |
508 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); |
509 | bcc_ptr += CIFS_SESS_KEY_SIZE; | |
3979877e SF |
510 | |
511 | /* can not sign if LANMAN negotiated so no need | |
512 | to calculate signing key? but what if server | |
513 | changed to do higher than lanman dialect and | |
514 | we reconnected would we ever calc signing_key? */ | |
515 | ||
790fe579 | 516 | cFYI(1, ("Negotiating LANMAN setting up strings")); |
3979877e SF |
517 | /* Unicode not allowed for LANMAN dialects */ |
518 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
790fe579 | 519 | #endif |
3979877e | 520 | } else if (type == NTLM) { |
7c7b25bc | 521 | char ntlm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e SF |
522 | |
523 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
524 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
7c7b25bc | 525 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e | 526 | pSMB->req_no_secext.CaseSensitivePasswordLength = |
7c7b25bc | 527 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
50c2f753 | 528 | |
3979877e SF |
529 | /* calculate session key */ |
530 | SMBNTencrypt(ses->password, ses->server->cryptKey, | |
531 | ntlm_session_key); | |
532 | ||
790fe579 | 533 | if (first_time) /* should this be moved into common code |
3979877e | 534 | with similar ntlmv2 path? */ |
b609f06a | 535 | cifs_calculate_mac_key(&ses->server->mac_signing_key, |
3979877e SF |
536 | ntlm_session_key, ses->password); |
537 | /* copy session key */ | |
538 | ||
790fe579 | 539 | memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); |
7c7b25bc | 540 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
790fe579 | 541 | memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); |
7c7b25bc | 542 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
790fe579 | 543 | if (ses->capabilities & CAP_UNICODE) { |
0223cf0b SF |
544 | /* unicode strings must be word aligned */ |
545 | if (iov[0].iov_len % 2) { | |
546 | *bcc_ptr = 0; | |
790fe579 SF |
547 | bcc_ptr++; |
548 | } | |
7c7b25bc | 549 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 550 | } else |
7c7b25bc SF |
551 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
552 | } else if (type == NTLMv2) { | |
790fe579 | 553 | char *v2_sess_key = |
6d027cfd | 554 | kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL); |
f64b23ae SF |
555 | |
556 | /* BB FIXME change all users of v2_sess_key to | |
557 | struct ntlmv2_resp */ | |
7c7b25bc | 558 | |
790fe579 | 559 | if (v2_sess_key == NULL) { |
2442421b SF |
560 | rc = -ENOMEM; |
561 | goto ssetup_exit; | |
7c7b25bc SF |
562 | } |
563 | ||
564 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
565 | ||
566 | /* LM2 password would be here if we supported it */ | |
567 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
568 | /* cpu_to_le16(LM2_SESS_KEY_SIZE); */ | |
569 | ||
570 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
f64b23ae | 571 | cpu_to_le16(sizeof(struct ntlmv2_resp)); |
7c7b25bc SF |
572 | |
573 | /* calculate session key */ | |
1717ffc5 | 574 | setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp); |
790fe579 SF |
575 | if (first_time) /* should this be moved into common code |
576 | with similar ntlmv2 path? */ | |
7c7b25bc SF |
577 | /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key, |
578 | response BB FIXME, v2_sess_key); */ | |
579 | ||
580 | /* copy session key */ | |
581 | ||
582 | /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE); | |
583 | bcc_ptr += LM2_SESS_KEY_SIZE; */ | |
3870253e SF |
584 | memcpy(bcc_ptr, (char *)v2_sess_key, |
585 | sizeof(struct ntlmv2_resp)); | |
f64b23ae SF |
586 | bcc_ptr += sizeof(struct ntlmv2_resp); |
587 | kfree(v2_sess_key); | |
790fe579 SF |
588 | if (ses->capabilities & CAP_UNICODE) { |
589 | if (iov[0].iov_len % 2) { | |
0223cf0b | 590 | *bcc_ptr = 0; |
26f57364 SF |
591 | bcc_ptr++; |
592 | } | |
3979877e | 593 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 594 | } else |
3979877e | 595 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
c16fefa5 | 596 | } else if (type == Kerberos || type == MSKerberos) { |
2442421b SF |
597 | #ifdef CONFIG_CIFS_UPCALL |
598 | struct cifs_spnego_msg *msg; | |
599 | spnego_key = cifs_get_spnego_key(ses); | |
600 | if (IS_ERR(spnego_key)) { | |
601 | rc = PTR_ERR(spnego_key); | |
602 | spnego_key = NULL; | |
603 | goto ssetup_exit; | |
604 | } | |
605 | ||
606 | msg = spnego_key->payload.data; | |
6ce5eecb SF |
607 | /* check version field to make sure that cifs.upcall is |
608 | sending us a response in an expected form */ | |
609 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
610 | cERROR(1, ("incorrect version of cifs.upcall (expected" | |
611 | " %d but got %d)", | |
612 | CIFS_SPNEGO_UPCALL_VERSION, msg->version)); | |
613 | rc = -EKEYREJECTED; | |
614 | goto ssetup_exit; | |
615 | } | |
2442421b SF |
616 | /* bail out if key is too long */ |
617 | if (msg->sesskey_len > | |
618 | sizeof(ses->server->mac_signing_key.data.krb5)) { | |
619 | cERROR(1, ("Kerberos signing key too long (%u bytes)", | |
620 | msg->sesskey_len)); | |
621 | rc = -EOVERFLOW; | |
622 | goto ssetup_exit; | |
623 | } | |
1a67570c JL |
624 | if (first_time) { |
625 | ses->server->mac_signing_key.len = msg->sesskey_len; | |
626 | memcpy(ses->server->mac_signing_key.data.krb5, | |
627 | msg->data, msg->sesskey_len); | |
628 | } | |
3979877e SF |
629 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
630 | capabilities |= CAP_EXTENDED_SECURITY; | |
631 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
2442421b SF |
632 | iov[1].iov_base = msg->data + msg->sesskey_len; |
633 | iov[1].iov_len = msg->secblob_len; | |
634 | pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len); | |
635 | ||
636 | if (ses->capabilities & CAP_UNICODE) { | |
637 | /* unicode strings must be word aligned */ | |
28c5a02a | 638 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { |
2442421b SF |
639 | *bcc_ptr = 0; |
640 | bcc_ptr++; | |
641 | } | |
642 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
643 | unicode_domain_string(&bcc_ptr, ses, nls_cp); | |
644 | } else | |
645 | /* BB: is this right? */ | |
646 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
647 | #else /* ! CONFIG_CIFS_UPCALL */ | |
648 | cERROR(1, ("Kerberos negotiated but upcall support disabled!")); | |
649 | rc = -ENOSYS; | |
650 | goto ssetup_exit; | |
651 | #endif /* CONFIG_CIFS_UPCALL */ | |
652 | } else { | |
653 | cERROR(1, ("secType %d not supported!", type)); | |
654 | rc = -ENOSYS; | |
655 | goto ssetup_exit; | |
3979877e SF |
656 | } |
657 | ||
2442421b SF |
658 | iov[2].iov_base = str_area; |
659 | iov[2].iov_len = (long) bcc_ptr - (long) str_area; | |
660 | ||
661 | count = iov[1].iov_len + iov[2].iov_len; | |
3979877e SF |
662 | smb_buf->smb_buf_length += count; |
663 | ||
3979877e SF |
664 | BCC_LE(smb_buf) = cpu_to_le16(count); |
665 | ||
2442421b | 666 | rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type, |
133672ef | 667 | CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR); |
3979877e SF |
668 | /* SMB request buf freed in SendReceive2 */ |
669 | ||
790fe579 SF |
670 | cFYI(1, ("ssetup rc from sendrecv2 is %d", rc)); |
671 | if (rc) | |
3979877e SF |
672 | goto ssetup_exit; |
673 | ||
674 | pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; | |
675 | smb_buf = (struct smb_hdr *)iov[0].iov_base; | |
676 | ||
790fe579 | 677 | if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) { |
3979877e | 678 | rc = -EIO; |
790fe579 | 679 | cERROR(1, ("bad word count %d", smb_buf->WordCount)); |
3979877e SF |
680 | goto ssetup_exit; |
681 | } | |
682 | action = le16_to_cpu(pSMB->resp.Action); | |
683 | if (action & GUEST_LOGIN) | |
189acaae | 684 | cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */ |
3979877e SF |
685 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
686 | cFYI(1, ("UID = %d ", ses->Suid)); | |
687 | /* response can have either 3 or 4 word count - Samba sends 3 */ | |
688 | /* and lanman response is 3 */ | |
689 | bytes_remaining = BCC(smb_buf); | |
690 | bcc_ptr = pByteArea(smb_buf); | |
691 | ||
790fe579 | 692 | if (smb_buf->WordCount == 4) { |
3979877e SF |
693 | __u16 blob_len; |
694 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
695 | bcc_ptr += blob_len; | |
790fe579 SF |
696 | if (blob_len > bytes_remaining) { |
697 | cERROR(1, ("bad security blob length %d", blob_len)); | |
3979877e SF |
698 | rc = -EINVAL; |
699 | goto ssetup_exit; | |
700 | } | |
701 | bytes_remaining -= blob_len; | |
790fe579 | 702 | } |
3979877e SF |
703 | |
704 | /* BB check if Unicode and decode strings */ | |
790fe579 | 705 | if (smb_buf->Flags2 & SMBFLG2_UNICODE) |
3979877e SF |
706 | rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining, |
707 | ses, nls_cp); | |
708 | else | |
63135e08 SF |
709 | rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining, |
710 | ses, nls_cp); | |
50c2f753 | 711 | |
3979877e | 712 | ssetup_exit: |
dfd15c46 JL |
713 | if (spnego_key) { |
714 | key_revoke(spnego_key); | |
2442421b | 715 | key_put(spnego_key); |
dfd15c46 | 716 | } |
750d1151 | 717 | kfree(str_area); |
790fe579 SF |
718 | if (resp_buf_type == CIFS_SMALL_BUFFER) { |
719 | cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base)); | |
3979877e | 720 | cifs_small_buf_release(iov[0].iov_base); |
790fe579 | 721 | } else if (resp_buf_type == CIFS_LARGE_BUFFER) |
3979877e SF |
722 | cifs_buf_release(iov[0].iov_base); |
723 | ||
724 | return rc; | |
725 | } |