Commit | Line | Data |
---|---|---|
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" |
3979877e | 34 | |
ebe6aa5a JL |
35 | /* |
36 | * Checks if this is the first smb session to be reconnected after | |
37 | * the socket has been reestablished (so we know whether to use vc 0). | |
38 | * Called while holding the cifs_tcp_ses_lock, so do not block | |
39 | */ | |
96daf2b0 | 40 | static bool is_first_ses_reconnect(struct cifs_ses *ses) |
eca6acf9 SF |
41 | { |
42 | struct list_head *tmp; | |
96daf2b0 | 43 | struct cifs_ses *tmp_ses; |
eca6acf9 SF |
44 | |
45 | list_for_each(tmp, &ses->server->smb_ses_list) { | |
96daf2b0 | 46 | tmp_ses = list_entry(tmp, struct cifs_ses, |
eca6acf9 SF |
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 | */ | |
96daf2b0 | 64 | static __le16 get_next_vcnum(struct cifs_ses *ses) |
eca6acf9 SF |
65 | { |
66 | __u16 vcnum = 0; | |
67 | struct list_head *tmp; | |
96daf2b0 | 68 | struct cifs_ses *tmp_ses; |
eca6acf9 SF |
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 | ||
3f9bcca7 | 80 | spin_lock(&cifs_tcp_ses_lock); |
eca6acf9 SF |
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) { | |
96daf2b0 | 90 | tmp_ses = list_entry(tmp, struct cifs_ses, |
eca6acf9 SF |
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: | |
3f9bcca7 | 112 | spin_unlock(&cifs_tcp_ses_lock); |
eca6acf9 | 113 | |
051a2a0d | 114 | return cpu_to_le16(vcnum); |
eca6acf9 SF |
115 | } |
116 | ||
96daf2b0 | 117 | static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB) |
3979877e SF |
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 | 126 | pSMB->req.AndXCommand = 0xFF; |
c974befa JL |
127 | pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32, |
128 | CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4, | |
129 | USHRT_MAX)); | |
3979877e | 130 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); |
eca6acf9 | 131 | pSMB->req.VcNumber = get_next_vcnum(ses); |
3979877e SF |
132 | |
133 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
134 | ||
790fe579 | 135 | /* BB verify whether signing required on neg or just on auth frame |
3979877e SF |
136 | (and NTLM case) */ |
137 | ||
138 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
139 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
140 | ||
96daf2b0 | 141 | if (ses->server->sec_mode & |
790fe579 | 142 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
3979877e SF |
143 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
144 | ||
145 | if (ses->capabilities & CAP_UNICODE) { | |
146 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
147 | capabilities |= CAP_UNICODE; | |
148 | } | |
149 | if (ses->capabilities & CAP_STATUS32) { | |
150 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
151 | capabilities |= CAP_STATUS32; | |
152 | } | |
153 | if (ses->capabilities & CAP_DFS) { | |
154 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
155 | capabilities |= CAP_DFS; | |
156 | } | |
26f57364 | 157 | if (ses->capabilities & CAP_UNIX) |
3979877e | 158 | capabilities |= CAP_UNIX; |
3979877e | 159 | |
3979877e SF |
160 | return capabilities; |
161 | } | |
162 | ||
0d3a01fa JL |
163 | static void |
164 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
165 | { | |
166 | char *bcc_ptr = *pbcc_area; | |
167 | int bytes_ret = 0; | |
168 | ||
169 | /* Copy OS version */ | |
acbbb76a SF |
170 | bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32, |
171 | nls_cp); | |
0d3a01fa | 172 | bcc_ptr += 2 * bytes_ret; |
acbbb76a SF |
173 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release, |
174 | 32, nls_cp); | |
0d3a01fa JL |
175 | bcc_ptr += 2 * bytes_ret; |
176 | bcc_ptr += 2; /* trailing null */ | |
177 | ||
acbbb76a SF |
178 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, |
179 | 32, nls_cp); | |
0d3a01fa JL |
180 | bcc_ptr += 2 * bytes_ret; |
181 | bcc_ptr += 2; /* trailing null */ | |
182 | ||
183 | *pbcc_area = bcc_ptr; | |
184 | } | |
185 | ||
96daf2b0 | 186 | static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses, |
0d3a01fa JL |
187 | const struct nls_table *nls_cp) |
188 | { | |
189 | char *bcc_ptr = *pbcc_area; | |
190 | int bytes_ret = 0; | |
191 | ||
192 | /* copy domain */ | |
193 | if (ses->domainName == NULL) { | |
194 | /* Sending null domain better than using a bogus domain name (as | |
195 | we did briefly in 2.6.18) since server will use its default */ | |
196 | *bcc_ptr = 0; | |
197 | *(bcc_ptr+1) = 0; | |
198 | bytes_ret = 0; | |
199 | } else | |
acbbb76a SF |
200 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName, |
201 | 256, nls_cp); | |
0d3a01fa JL |
202 | bcc_ptr += 2 * bytes_ret; |
203 | bcc_ptr += 2; /* account for null terminator */ | |
204 | ||
205 | *pbcc_area = bcc_ptr; | |
206 | } | |
207 | ||
208 | ||
96daf2b0 | 209 | static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 210 | const struct nls_table *nls_cp) |
3979877e | 211 | { |
790fe579 | 212 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
213 | int bytes_ret = 0; |
214 | ||
215 | /* BB FIXME add check that strings total less | |
216 | than 335 or will need to send them as arrays */ | |
217 | ||
0223cf0b SF |
218 | /* unicode strings, must be word aligned before the call */ |
219 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
220 | *bcc_ptr = 0; |
221 | bcc_ptr++; | |
0223cf0b | 222 | } */ |
3979877e | 223 | /* copy user */ |
8727c8a8 | 224 | if (ses->user_name == NULL) { |
6e659c63 SF |
225 | /* null user mount */ |
226 | *bcc_ptr = 0; | |
227 | *(bcc_ptr+1) = 0; | |
301a6a31 | 228 | } else { |
acbbb76a SF |
229 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name, |
230 | MAX_USERNAME_SIZE, nls_cp); | |
3979877e SF |
231 | } |
232 | bcc_ptr += 2 * bytes_ret; | |
233 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 234 | |
0d3a01fa JL |
235 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
236 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
237 | |
238 | *pbcc_area = bcc_ptr; | |
239 | } | |
240 | ||
96daf2b0 | 241 | static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 242 | const struct nls_table *nls_cp) |
3979877e | 243 | { |
790fe579 | 244 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
245 | |
246 | /* copy user */ | |
247 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 | 248 | /* copy user */ |
de47a417 | 249 | if (ses->user_name != NULL) { |
8727c8a8 | 250 | strncpy(bcc_ptr, ses->user_name, MAX_USERNAME_SIZE); |
de47a417 SP |
251 | bcc_ptr += strnlen(ses->user_name, MAX_USERNAME_SIZE); |
252 | } | |
8727c8a8 | 253 | /* else null user mount */ |
3979877e | 254 | *bcc_ptr = 0; |
790fe579 | 255 | bcc_ptr++; /* account for null termination */ |
3979877e | 256 | |
790fe579 | 257 | /* copy domain */ |
790fe579 SF |
258 | if (ses->domainName != NULL) { |
259 | strncpy(bcc_ptr, ses->domainName, 256); | |
3979877e | 260 | bcc_ptr += strnlen(ses->domainName, 256); |
790fe579 | 261 | } /* else we will send a null domain name |
6e659c63 | 262 | so the server will default to its own domain */ |
3979877e SF |
263 | *bcc_ptr = 0; |
264 | bcc_ptr++; | |
265 | ||
266 | /* BB check for overflow here */ | |
267 | ||
268 | strcpy(bcc_ptr, "Linux version "); | |
269 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
270 | strcpy(bcc_ptr, init_utsname()->release); |
271 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
272 | |
273 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
274 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
275 | ||
790fe579 | 276 | *pbcc_area = bcc_ptr; |
3979877e SF |
277 | } |
278 | ||
59140797 | 279 | static void |
96daf2b0 | 280 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses, |
59140797 | 281 | const struct nls_table *nls_cp) |
3979877e | 282 | { |
59140797 | 283 | int len; |
790fe579 | 284 | char *data = *pbcc_area; |
3979877e | 285 | |
f96637be | 286 | cifs_dbg(FYI, "bleft %d\n", bleft); |
3979877e | 287 | |
26f57364 | 288 | kfree(ses->serverOS); |
acbbb76a | 289 | ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 290 | cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS); |
59140797 JL |
291 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
292 | data += len; | |
293 | bleft -= len; | |
294 | if (bleft <= 0) | |
295 | return; | |
3979877e | 296 | |
26f57364 | 297 | kfree(ses->serverNOS); |
acbbb76a | 298 | ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 299 | cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS); |
59140797 JL |
300 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
301 | data += len; | |
302 | bleft -= len; | |
303 | if (bleft <= 0) | |
304 | return; | |
790fe579 | 305 | |
26f57364 | 306 | kfree(ses->serverDomain); |
acbbb76a | 307 | ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 308 | cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain); |
790fe579 | 309 | |
59140797 | 310 | return; |
3979877e SF |
311 | } |
312 | ||
7d066459 JL |
313 | static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, |
314 | struct cifs_ses *ses, | |
315 | const struct nls_table *nls_cp) | |
3979877e | 316 | { |
3979877e | 317 | int len; |
790fe579 | 318 | char *bcc_ptr = *pbcc_area; |
3979877e | 319 | |
f96637be | 320 | cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft); |
50c2f753 | 321 | |
3979877e | 322 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 323 | if (len >= bleft) |
7d066459 | 324 | return; |
50c2f753 | 325 | |
26f57364 | 326 | kfree(ses->serverOS); |
3979877e SF |
327 | |
328 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 329 | if (ses->serverOS) |
3979877e | 330 | strncpy(ses->serverOS, bcc_ptr, len); |
281e2e7d | 331 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) |
f96637be | 332 | cifs_dbg(FYI, "OS/2 server\n"); |
3979877e SF |
333 | |
334 | bcc_ptr += len + 1; | |
335 | bleft -= len + 1; | |
336 | ||
337 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 338 | if (len >= bleft) |
7d066459 | 339 | return; |
3979877e | 340 | |
26f57364 | 341 | kfree(ses->serverNOS); |
3979877e SF |
342 | |
343 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 344 | if (ses->serverNOS) |
3979877e SF |
345 | strncpy(ses->serverNOS, bcc_ptr, len); |
346 | ||
347 | bcc_ptr += len + 1; | |
348 | bleft -= len + 1; | |
349 | ||
790fe579 SF |
350 | len = strnlen(bcc_ptr, bleft); |
351 | if (len > bleft) | |
7d066459 | 352 | return; |
3979877e | 353 | |
9ac00b7d SF |
354 | /* No domain field in LANMAN case. Domain is |
355 | returned by old servers in the SMB negprot response */ | |
356 | /* BB For newer servers which do not support Unicode, | |
357 | but thus do return domain here we could add parsing | |
358 | for it later, but it is not very important */ | |
f96637be | 359 | cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); |
3979877e SF |
360 | } |
361 | ||
5478f9ba | 362 | int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
96daf2b0 | 363 | struct cifs_ses *ses) |
0b3cc858 | 364 | { |
2b149f11 SP |
365 | unsigned int tioffset; /* challenge message target info area */ |
366 | unsigned int tilen; /* challenge message target info area length */ | |
367 | ||
0b3cc858 SF |
368 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; |
369 | ||
370 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
f96637be | 371 | cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len); |
0b3cc858 SF |
372 | return -EINVAL; |
373 | } | |
374 | ||
375 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
f96637be JP |
376 | cifs_dbg(VFS, "blob signature incorrect %s\n", |
377 | pblob->Signature); | |
0b3cc858 SF |
378 | return -EINVAL; |
379 | } | |
380 | if (pblob->MessageType != NtLmChallenge) { | |
f96637be JP |
381 | cifs_dbg(VFS, "Incorrect message type %d\n", |
382 | pblob->MessageType); | |
0b3cc858 SF |
383 | return -EINVAL; |
384 | } | |
385 | ||
d3686d54 | 386 | memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
0b3cc858 SF |
387 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ |
388 | /* In particular we can examine sign flags */ | |
389 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
390 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
d3686d54 | 391 | ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); |
5443d130 SF |
392 | tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset); |
393 | tilen = le16_to_cpu(pblob->TargetInfoArray.Length); | |
4991a5fa | 394 | if (tioffset > blob_len || tioffset + tilen > blob_len) { |
f96637be JP |
395 | cifs_dbg(VFS, "tioffset + tilen too high %u + %u", |
396 | tioffset, tilen); | |
4991a5fa DC |
397 | return -EINVAL; |
398 | } | |
d3686d54 | 399 | if (tilen) { |
f7f7c185 SMP |
400 | ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen, |
401 | GFP_KERNEL); | |
d3686d54 | 402 | if (!ses->auth_key.response) { |
f96637be | 403 | cifs_dbg(VFS, "Challenge target info alloc failure"); |
2b149f11 SP |
404 | return -ENOMEM; |
405 | } | |
d3686d54 | 406 | ses->auth_key.len = tilen; |
2b149f11 SP |
407 | } |
408 | ||
0b3cc858 SF |
409 | return 0; |
410 | } | |
411 | ||
0b3cc858 SF |
412 | /* BB Move to ntlmssp.c eventually */ |
413 | ||
414 | /* We do not malloc the blob, it is passed in pbuffer, because | |
415 | it is fixed size, and small, making this approach cleaner */ | |
5478f9ba | 416 | void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, |
96daf2b0 | 417 | struct cifs_ses *ses) |
0b3cc858 SF |
418 | { |
419 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; | |
420 | __u32 flags; | |
421 | ||
df8fbc24 | 422 | memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); |
0b3cc858 SF |
423 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
424 | sec_blob->MessageType = NtLmNegotiate; | |
425 | ||
426 | /* BB is NTLMV2 session security format easier to use here? */ | |
427 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
428 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
df8fbc24 | 429 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; |
96daf2b0 | 430 | if (ses->server->sec_mode & |
d2b91521 | 431 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { |
745e507a | 432 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
d2b91521 | 433 | if (!ses->server->session_estab) |
62411ab2 | 434 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; |
d2b91521 | 435 | } |
0b3cc858 | 436 | |
df8fbc24 | 437 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
438 | |
439 | sec_blob->WorkstationName.BufferOffset = 0; | |
440 | sec_blob->WorkstationName.Length = 0; | |
441 | sec_blob->WorkstationName.MaximumLength = 0; | |
442 | ||
443 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
444 | sec_blob->DomainName.BufferOffset = 0; | |
445 | sec_blob->DomainName.Length = 0; | |
446 | sec_blob->DomainName.MaximumLength = 0; | |
447 | } | |
448 | ||
449 | /* We do not malloc the blob, it is passed in pbuffer, because its | |
450 | maximum possible size is fixed and small, making this approach cleaner. | |
451 | This function returns the length of the data in the blob */ | |
5478f9ba | 452 | int build_ntlmssp_auth_blob(unsigned char *pbuffer, |
89f150f4 | 453 | u16 *buflen, |
96daf2b0 | 454 | struct cifs_ses *ses, |
2b149f11 | 455 | const struct nls_table *nls_cp) |
0b3cc858 | 456 | { |
2b149f11 | 457 | int rc; |
0b3cc858 SF |
458 | AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer; |
459 | __u32 flags; | |
460 | unsigned char *tmp; | |
0b3cc858 SF |
461 | |
462 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
463 | sec_blob->MessageType = NtLmAuthenticate; | |
464 | ||
465 | flags = NTLMSSP_NEGOTIATE_56 | | |
466 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
467 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
df8fbc24 | 468 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; |
96daf2b0 | 469 | if (ses->server->sec_mode & |
62411ab2 | 470 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { |
0b3cc858 | 471 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
62411ab2 SP |
472 | if (!ses->server->session_estab) |
473 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
474 | } | |
0b3cc858 SF |
475 | |
476 | tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE); | |
df8fbc24 | 477 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
478 | |
479 | sec_blob->LmChallengeResponse.BufferOffset = | |
480 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
481 | sec_blob->LmChallengeResponse.Length = 0; | |
482 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
483 | ||
c8e56f1f | 484 | sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer); |
21e73393 | 485 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
2b149f11 | 486 | if (rc) { |
f96637be | 487 | cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc); |
2b149f11 SP |
488 | goto setup_ntlmv2_ret; |
489 | } | |
21e73393 SP |
490 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
491 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
492 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
c8e56f1f | 493 | |
21e73393 SP |
494 | sec_blob->NtChallengeResponse.Length = |
495 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
2b149f11 | 496 | sec_blob->NtChallengeResponse.MaximumLength = |
21e73393 | 497 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); |
0b3cc858 SF |
498 | |
499 | if (ses->domainName == NULL) { | |
500 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
501 | sec_blob->DomainName.Length = 0; | |
502 | sec_blob->DomainName.MaximumLength = 0; | |
503 | tmp += 2; | |
504 | } else { | |
505 | int len; | |
acbbb76a SF |
506 | len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName, |
507 | MAX_USERNAME_SIZE, nls_cp); | |
0b3cc858 | 508 | len *= 2; /* unicode is 2 bytes each */ |
0b3cc858 SF |
509 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); |
510 | sec_blob->DomainName.Length = cpu_to_le16(len); | |
511 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
512 | tmp += len; | |
513 | } | |
514 | ||
8727c8a8 | 515 | if (ses->user_name == NULL) { |
0b3cc858 SF |
516 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); |
517 | sec_blob->UserName.Length = 0; | |
518 | sec_blob->UserName.MaximumLength = 0; | |
519 | tmp += 2; | |
520 | } else { | |
521 | int len; | |
acbbb76a SF |
522 | len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name, |
523 | MAX_USERNAME_SIZE, nls_cp); | |
0b3cc858 | 524 | len *= 2; /* unicode is 2 bytes each */ |
0b3cc858 SF |
525 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); |
526 | sec_blob->UserName.Length = cpu_to_le16(len); | |
527 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
528 | tmp += len; | |
529 | } | |
530 | ||
531 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
532 | sec_blob->WorkstationName.Length = 0; | |
533 | sec_blob->WorkstationName.MaximumLength = 0; | |
534 | tmp += 2; | |
535 | ||
df8fbc24 SP |
536 | if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || |
537 | (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) | |
538 | && !calc_seckey(ses)) { | |
d3686d54 | 539 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
d2b91521 SP |
540 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); |
541 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); | |
542 | sec_blob->SessionKey.MaximumLength = | |
543 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
544 | tmp += CIFS_CPHTXT_SIZE; | |
545 | } else { | |
546 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
547 | sec_blob->SessionKey.Length = 0; | |
548 | sec_blob->SessionKey.MaximumLength = 0; | |
549 | } | |
2b149f11 SP |
550 | |
551 | setup_ntlmv2_ret: | |
89f150f4 SP |
552 | *buflen = tmp - pbuffer; |
553 | return rc; | |
0b3cc858 | 554 | } |
0b3cc858 | 555 | |
790fe579 | 556 | int |
58c45c58 | 557 | CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, |
ebe6aa5a | 558 | const struct nls_table *nls_cp) |
3979877e SF |
559 | { |
560 | int rc = 0; | |
561 | int wct; | |
3979877e SF |
562 | struct smb_hdr *smb_buf; |
563 | char *bcc_ptr; | |
750d1151 | 564 | char *str_area; |
3979877e SF |
565 | SESSION_SETUP_ANDX *pSMB; |
566 | __u32 capabilities; | |
690c522f | 567 | __u16 count; |
2442421b SF |
568 | int resp_buf_type; |
569 | struct kvec iov[3]; | |
3979877e | 570 | enum securityEnum type; |
690c522f | 571 | __u16 action, bytes_remaining; |
2442421b | 572 | struct key *spnego_key = NULL; |
0b3cc858 | 573 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
89f150f4 | 574 | u16 blob_len; |
2b149f11 | 575 | char *ntlmsspblob = NULL; |
254e55ed | 576 | |
3534b850 JL |
577 | if (ses == NULL) { |
578 | WARN(1, "%s: ses == NULL!", __func__); | |
3979877e | 579 | return -EINVAL; |
3534b850 | 580 | } |
3979877e SF |
581 | |
582 | type = ses->server->secType; | |
f96637be | 583 | cifs_dbg(FYI, "sess setup type %d\n", type); |
d3686d54 SP |
584 | if (type == RawNTLMSSP) { |
585 | /* if memory allocation is successful, caller of this function | |
586 | * frees it. | |
587 | */ | |
588 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
589 | if (!ses->ntlmssp) | |
590 | return -ENOMEM; | |
591 | } | |
592 | ||
0b3cc858 SF |
593 | ssetup_ntlmssp_authenticate: |
594 | if (phase == NtLmChallenge) | |
595 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
596 | ||
790fe579 | 597 | if (type == LANMAN) { |
3979877e SF |
598 | #ifndef CONFIG_CIFS_WEAK_PW_HASH |
599 | /* LANMAN and plaintext are less secure and off by default. | |
600 | So we make this explicitly be turned on in kconfig (in the | |
601 | build) and turned on at runtime (changed from the default) | |
602 | in proc/fs/cifs or via mount parm. Unfortunately this is | |
603 | needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
604 | return -EOPNOTSUPP; | |
605 | #endif | |
606 | wct = 10; /* lanman 2 style sessionsetup */ | |
790fe579 | 607 | } else if ((type == NTLM) || (type == NTLMv2)) { |
9312f675 | 608 | /* For NTLMv2 failures eventually may need to retry NTLM */ |
3979877e | 609 | wct = 13; /* old style NTLM sessionsetup */ |
790fe579 | 610 | } else /* same size: negotiate or auth, NTLMSSP or extended security */ |
3979877e SF |
611 | wct = 12; |
612 | ||
613 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
614 | (void **)&smb_buf); | |
790fe579 | 615 | if (rc) |
3979877e SF |
616 | return rc; |
617 | ||
618 | pSMB = (SESSION_SETUP_ANDX *)smb_buf; | |
619 | ||
620 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
750d1151 | 621 | |
2442421b SF |
622 | /* we will send the SMB in three pieces: |
623 | a fixed length beginning part, an optional | |
624 | SPNEGO blob (which can be zero length), and a | |
625 | last part which will include the strings | |
626 | and rest of bcc area. This allows us to avoid | |
627 | a large buffer 17K allocation */ | |
790fe579 | 628 | iov[0].iov_base = (char *)pSMB; |
be8e3b00 | 629 | iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; |
750d1151 | 630 | |
2442421b SF |
631 | /* setting this here allows the code at the end of the function |
632 | to free the request buffer if there's an error */ | |
633 | resp_buf_type = CIFS_SMALL_BUFFER; | |
634 | ||
750d1151 SF |
635 | /* 2000 big enough to fit max user, domain, NOS name etc. */ |
636 | str_area = kmalloc(2000, GFP_KERNEL); | |
5e6e6232 | 637 | if (str_area == NULL) { |
2442421b SF |
638 | rc = -ENOMEM; |
639 | goto ssetup_exit; | |
5e6e6232 | 640 | } |
750d1151 | 641 | bcc_ptr = str_area; |
3979877e | 642 | |
2442421b SF |
643 | iov[1].iov_base = NULL; |
644 | iov[1].iov_len = 0; | |
645 | ||
790fe579 | 646 | if (type == LANMAN) { |
3979877e | 647 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
5e640927 | 648 | char lnm_session_key[CIFS_AUTH_RESP_SIZE]; |
3979877e | 649 | |
c76da9da SF |
650 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; |
651 | ||
3979877e SF |
652 | /* no capabilities flags in old lanman negotiation */ |
653 | ||
5e640927 | 654 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
3979877e | 655 | |
d3ba50b1 SP |
656 | /* Calculate hash with password and copy into bcc_ptr. |
657 | * Encryption Key (stored as in cryptkey) gets used if the | |
658 | * security mode bit in Negottiate Protocol response states | |
659 | * to use challenge/response method (i.e. Password bit is 1). | |
660 | */ | |
661 | ||
43988d76 | 662 | rc = calc_lanman_hash(ses->password, ses->server->cryptkey, |
96daf2b0 | 663 | ses->server->sec_mode & SECMODE_PW_ENCRYPT ? |
4e53a3fb JL |
664 | true : false, lnm_session_key); |
665 | ||
5e640927 SP |
666 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); |
667 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
3979877e SF |
668 | |
669 | /* can not sign if LANMAN negotiated so no need | |
670 | to calculate signing key? but what if server | |
671 | changed to do higher than lanman dialect and | |
672 | we reconnected would we ever calc signing_key? */ | |
673 | ||
f96637be | 674 | cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n"); |
3979877e SF |
675 | /* Unicode not allowed for LANMAN dialects */ |
676 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
790fe579 | 677 | #endif |
3979877e | 678 | } else if (type == NTLM) { |
3979877e SF |
679 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); |
680 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
21e73393 | 681 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
3979877e | 682 | pSMB->req_no_secext.CaseSensitivePasswordLength = |
21e73393 SP |
683 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
684 | ||
685 | /* calculate ntlm response and session key */ | |
9ef5992e | 686 | rc = setup_ntlm_response(ses, nls_cp); |
21e73393 | 687 | if (rc) { |
f96637be JP |
688 | cifs_dbg(VFS, "Error %d during NTLM authentication\n", |
689 | rc); | |
21e73393 SP |
690 | goto ssetup_exit; |
691 | } | |
50c2f753 | 692 | |
21e73393 SP |
693 | /* copy ntlm response */ |
694 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
695 | CIFS_AUTH_RESP_SIZE); | |
696 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
697 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
698 | CIFS_AUTH_RESP_SIZE); | |
699 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
3979877e | 700 | |
790fe579 | 701 | if (ses->capabilities & CAP_UNICODE) { |
0223cf0b SF |
702 | /* unicode strings must be word aligned */ |
703 | if (iov[0].iov_len % 2) { | |
704 | *bcc_ptr = 0; | |
790fe579 SF |
705 | bcc_ptr++; |
706 | } | |
7c7b25bc | 707 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 708 | } else |
7c7b25bc SF |
709 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
710 | } else if (type == NTLMv2) { | |
7c7b25bc SF |
711 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); |
712 | ||
713 | /* LM2 password would be here if we supported it */ | |
714 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
7c7b25bc | 715 | |
21e73393 SP |
716 | /* calculate nlmv2 response and session key */ |
717 | rc = setup_ntlmv2_rsp(ses, nls_cp); | |
2b149f11 | 718 | if (rc) { |
f96637be JP |
719 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", |
720 | rc); | |
2b149f11 SP |
721 | goto ssetup_exit; |
722 | } | |
21e73393 SP |
723 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
724 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
725 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
726 | ||
c9928f70 SP |
727 | /* set case sensitive password length after tilen may get |
728 | * assigned, tilen is 0 otherwise. | |
729 | */ | |
730 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
f7c5445a | 731 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); |
c9928f70 | 732 | |
790fe579 SF |
733 | if (ses->capabilities & CAP_UNICODE) { |
734 | if (iov[0].iov_len % 2) { | |
0223cf0b | 735 | *bcc_ptr = 0; |
26f57364 SF |
736 | bcc_ptr++; |
737 | } | |
3979877e | 738 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 739 | } else |
3979877e | 740 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
26efa0ba | 741 | } else if (type == Kerberos) { |
2442421b SF |
742 | #ifdef CONFIG_CIFS_UPCALL |
743 | struct cifs_spnego_msg *msg; | |
21e73393 | 744 | |
2442421b SF |
745 | spnego_key = cifs_get_spnego_key(ses); |
746 | if (IS_ERR(spnego_key)) { | |
747 | rc = PTR_ERR(spnego_key); | |
748 | spnego_key = NULL; | |
749 | goto ssetup_exit; | |
750 | } | |
751 | ||
752 | msg = spnego_key->payload.data; | |
6ce5eecb SF |
753 | /* check version field to make sure that cifs.upcall is |
754 | sending us a response in an expected form */ | |
755 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
f96637be JP |
756 | cifs_dbg(VFS, "incorrect version of cifs.upcall " |
757 | "expected %d but got %d)", | |
b6b38f70 | 758 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); |
6ce5eecb SF |
759 | rc = -EKEYREJECTED; |
760 | goto ssetup_exit; | |
761 | } | |
21e73393 | 762 | |
f7f7c185 SMP |
763 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, |
764 | GFP_KERNEL); | |
21e73393 | 765 | if (!ses->auth_key.response) { |
f96637be | 766 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory", |
21e73393 SP |
767 | msg->sesskey_len); |
768 | rc = -ENOMEM; | |
2442421b SF |
769 | goto ssetup_exit; |
770 | } | |
5d0d2882 | 771 | ses->auth_key.len = msg->sesskey_len; |
21e73393 | 772 | |
3979877e SF |
773 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
774 | capabilities |= CAP_EXTENDED_SECURITY; | |
775 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
2442421b SF |
776 | iov[1].iov_base = msg->data + msg->sesskey_len; |
777 | iov[1].iov_len = msg->secblob_len; | |
778 | pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len); | |
779 | ||
780 | if (ses->capabilities & CAP_UNICODE) { | |
781 | /* unicode strings must be word aligned */ | |
28c5a02a | 782 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { |
2442421b SF |
783 | *bcc_ptr = 0; |
784 | bcc_ptr++; | |
785 | } | |
786 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
787 | unicode_domain_string(&bcc_ptr, ses, nls_cp); | |
788 | } else | |
789 | /* BB: is this right? */ | |
790 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
791 | #else /* ! CONFIG_CIFS_UPCALL */ | |
f96637be | 792 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); |
2442421b SF |
793 | rc = -ENOSYS; |
794 | goto ssetup_exit; | |
795 | #endif /* CONFIG_CIFS_UPCALL */ | |
b4d6fcf1 JL |
796 | } else if (type == RawNTLMSSP) { |
797 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { | |
f96637be | 798 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); |
b4d6fcf1 JL |
799 | rc = -ENOSYS; |
800 | goto ssetup_exit; | |
801 | } | |
802 | ||
f96637be | 803 | cifs_dbg(FYI, "ntlmssp session setup phase %d\n", phase); |
b4d6fcf1 JL |
804 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
805 | capabilities |= CAP_EXTENDED_SECURITY; | |
806 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
807 | switch(phase) { | |
808 | case NtLmNegotiate: | |
809 | build_ntlmssp_negotiate_blob( | |
810 | pSMB->req.SecurityBlob, ses); | |
811 | iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
812 | iov[1].iov_base = pSMB->req.SecurityBlob; | |
813 | pSMB->req.SecurityBlobLength = | |
814 | cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
815 | break; | |
816 | case NtLmAuthenticate: | |
817 | /* | |
818 | * 5 is an empirical value, large enough to hold | |
819 | * authenticate message plus max 10 of av paris, | |
820 | * domain, user, workstation names, flags, etc. | |
821 | */ | |
822 | ntlmsspblob = kzalloc( | |
823 | 5*sizeof(struct _AUTHENTICATE_MESSAGE), | |
824 | GFP_KERNEL); | |
825 | if (!ntlmsspblob) { | |
b4d6fcf1 | 826 | rc = -ENOMEM; |
0b3cc858 SF |
827 | goto ssetup_exit; |
828 | } | |
829 | ||
b4d6fcf1 JL |
830 | rc = build_ntlmssp_auth_blob(ntlmsspblob, |
831 | &blob_len, ses, nls_cp); | |
832 | if (rc) | |
0b3cc858 | 833 | goto ssetup_exit; |
b4d6fcf1 JL |
834 | iov[1].iov_len = blob_len; |
835 | iov[1].iov_base = ntlmsspblob; | |
836 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
837 | /* | |
838 | * Make sure that we tell the server that we are using | |
839 | * the uid that it just gave us back on the response | |
840 | * (challenge) | |
841 | */ | |
842 | smb_buf->Uid = ses->Suid; | |
843 | break; | |
844 | default: | |
f96637be | 845 | cifs_dbg(VFS, "invalid phase %d\n", phase); |
0b3cc858 SF |
846 | rc = -ENOSYS; |
847 | goto ssetup_exit; | |
848 | } | |
b4d6fcf1 JL |
849 | /* unicode strings must be word aligned */ |
850 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { | |
851 | *bcc_ptr = 0; | |
852 | bcc_ptr++; | |
853 | } | |
854 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
855 | } else { | |
f96637be | 856 | cifs_dbg(VFS, "secType %d not supported!\n", type); |
2442421b SF |
857 | rc = -ENOSYS; |
858 | goto ssetup_exit; | |
3979877e SF |
859 | } |
860 | ||
2442421b SF |
861 | iov[2].iov_base = str_area; |
862 | iov[2].iov_len = (long) bcc_ptr - (long) str_area; | |
863 | ||
864 | count = iov[1].iov_len + iov[2].iov_len; | |
be8e3b00 SF |
865 | smb_buf->smb_buf_length = |
866 | cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count); | |
3979877e | 867 | |
820a803f | 868 | put_bcc(count, smb_buf); |
3979877e | 869 | |
2442421b | 870 | rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type, |
7749981e | 871 | CIFS_LOG_ERROR); |
3979877e SF |
872 | /* SMB request buf freed in SendReceive2 */ |
873 | ||
3979877e SF |
874 | pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; |
875 | smb_buf = (struct smb_hdr *)iov[0].iov_base; | |
876 | ||
f065fd09 PS |
877 | if ((type == RawNTLMSSP) && (resp_buf_type != CIFS_NO_BUFFER) && |
878 | (smb_buf->Status.CifsError == | |
0b3cc858 SF |
879 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) { |
880 | if (phase != NtLmNegotiate) { | |
f96637be | 881 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
0b3cc858 SF |
882 | goto ssetup_exit; |
883 | } | |
884 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
885 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
886 | rc = 0; /* MORE_PROC rc is not an error here, but expected */ | |
887 | } | |
888 | if (rc) | |
889 | goto ssetup_exit; | |
890 | ||
790fe579 | 891 | if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) { |
3979877e | 892 | rc = -EIO; |
f96637be | 893 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
3979877e SF |
894 | goto ssetup_exit; |
895 | } | |
896 | action = le16_to_cpu(pSMB->resp.Action); | |
897 | if (action & GUEST_LOGIN) | |
f96637be | 898 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
3979877e | 899 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
f96637be | 900 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); |
3979877e SF |
901 | /* response can have either 3 or 4 word count - Samba sends 3 */ |
902 | /* and lanman response is 3 */ | |
690c522f | 903 | bytes_remaining = get_bcc(smb_buf); |
3979877e SF |
904 | bcc_ptr = pByteArea(smb_buf); |
905 | ||
790fe579 | 906 | if (smb_buf->WordCount == 4) { |
3979877e | 907 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
790fe579 | 908 | if (blob_len > bytes_remaining) { |
f96637be JP |
909 | cifs_dbg(VFS, "bad security blob length %d\n", |
910 | blob_len); | |
3979877e SF |
911 | rc = -EINVAL; |
912 | goto ssetup_exit; | |
913 | } | |
0b3cc858 SF |
914 | if (phase == NtLmChallenge) { |
915 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); | |
916 | /* now goto beginning for ntlmssp authenticate phase */ | |
917 | if (rc) | |
918 | goto ssetup_exit; | |
919 | } | |
920 | bcc_ptr += blob_len; | |
3979877e | 921 | bytes_remaining -= blob_len; |
790fe579 | 922 | } |
3979877e SF |
923 | |
924 | /* BB check if Unicode and decode strings */ | |
fcda7f45 JL |
925 | if (bytes_remaining == 0) { |
926 | /* no string area to decode, do nothing */ | |
927 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 JL |
928 | /* unicode string area must be word-aligned */ |
929 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
930 | ++bcc_ptr; | |
931 | --bytes_remaining; | |
932 | } | |
59140797 | 933 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp); |
27b87fe5 | 934 | } else { |
7d066459 | 935 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp); |
27b87fe5 | 936 | } |
50c2f753 | 937 | |
3979877e | 938 | ssetup_exit: |
dfd15c46 | 939 | if (spnego_key) { |
00401ff7 | 940 | key_invalidate(spnego_key); |
2442421b | 941 | key_put(spnego_key); |
dfd15c46 | 942 | } |
750d1151 | 943 | kfree(str_area); |
2b149f11 SP |
944 | kfree(ntlmsspblob); |
945 | ntlmsspblob = NULL; | |
790fe579 | 946 | if (resp_buf_type == CIFS_SMALL_BUFFER) { |
f96637be | 947 | cifs_dbg(FYI, "ssetup freeing small buf %p\n", iov[0].iov_base); |
3979877e | 948 | cifs_small_buf_release(iov[0].iov_base); |
790fe579 | 949 | } else if (resp_buf_type == CIFS_LARGE_BUFFER) |
3979877e SF |
950 | cifs_buf_release(iov[0].iov_base); |
951 | ||
0b3cc858 SF |
952 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
953 | if ((phase == NtLmChallenge) && (rc == 0)) | |
954 | goto ssetup_ntlmssp_authenticate; | |
955 | ||
3979877e SF |
956 | return rc; |
957 | } |