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> |
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 | ||
051a2a0d | 114 | return cpu_to_le16(vcnum); |
eca6acf9 SF |
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 | ||
59140797 JL |
280 | static void |
281 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses, | |
282 | const struct nls_table *nls_cp) | |
3979877e | 283 | { |
59140797 | 284 | int len; |
790fe579 | 285 | char *data = *pbcc_area; |
3979877e | 286 | |
790fe579 | 287 | cFYI(1, ("bleft %d", bleft)); |
3979877e | 288 | |
27b87fe5 JL |
289 | /* |
290 | * Windows servers do not always double null terminate their final | |
291 | * Unicode string. Check to see if there are an uneven number of bytes | |
292 | * left. If so, then add an extra NULL pad byte to the end of the | |
293 | * response. | |
294 | * | |
295 | * See section 2.7.2 in "Implementing CIFS" for details | |
296 | */ | |
297 | if (bleft % 2) { | |
298 | data[bleft] = 0; | |
299 | ++bleft; | |
300 | } | |
50c2f753 | 301 | |
26f57364 | 302 | kfree(ses->serverOS); |
d185cda7 | 303 | ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
59140797 JL |
304 | cFYI(1, ("serverOS=%s", ses->serverOS)); |
305 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; | |
306 | data += len; | |
307 | bleft -= len; | |
308 | if (bleft <= 0) | |
309 | return; | |
3979877e | 310 | |
26f57364 | 311 | kfree(ses->serverNOS); |
d185cda7 | 312 | ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
59140797 JL |
313 | cFYI(1, ("serverNOS=%s", ses->serverNOS)); |
314 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; | |
315 | data += len; | |
316 | bleft -= len; | |
317 | if (bleft <= 0) | |
318 | return; | |
790fe579 | 319 | |
26f57364 | 320 | kfree(ses->serverDomain); |
d185cda7 | 321 | ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
59140797 | 322 | cFYI(1, ("serverDomain=%s", ses->serverDomain)); |
790fe579 | 323 | |
59140797 | 324 | return; |
3979877e SF |
325 | } |
326 | ||
790fe579 SF |
327 | static int decode_ascii_ssetup(char **pbcc_area, int bleft, |
328 | struct cifsSesInfo *ses, | |
329 | const struct nls_table *nls_cp) | |
3979877e SF |
330 | { |
331 | int rc = 0; | |
332 | int len; | |
790fe579 | 333 | char *bcc_ptr = *pbcc_area; |
3979877e | 334 | |
790fe579 | 335 | cFYI(1, ("decode sessetup ascii. bleft %d", bleft)); |
50c2f753 | 336 | |
3979877e | 337 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 338 | if (len >= bleft) |
3979877e | 339 | return rc; |
50c2f753 | 340 | |
26f57364 | 341 | kfree(ses->serverOS); |
3979877e SF |
342 | |
343 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 344 | if (ses->serverOS) |
3979877e | 345 | strncpy(ses->serverOS, bcc_ptr, len); |
790fe579 SF |
346 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) { |
347 | cFYI(1, ("OS/2 server")); | |
9ac00b7d SF |
348 | ses->flags |= CIFS_SES_OS2; |
349 | } | |
3979877e SF |
350 | |
351 | bcc_ptr += len + 1; | |
352 | bleft -= len + 1; | |
353 | ||
354 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 355 | if (len >= bleft) |
3979877e SF |
356 | return rc; |
357 | ||
26f57364 | 358 | kfree(ses->serverNOS); |
3979877e SF |
359 | |
360 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 361 | if (ses->serverNOS) |
3979877e SF |
362 | strncpy(ses->serverNOS, bcc_ptr, len); |
363 | ||
364 | bcc_ptr += len + 1; | |
365 | bleft -= len + 1; | |
366 | ||
790fe579 SF |
367 | len = strnlen(bcc_ptr, bleft); |
368 | if (len > bleft) | |
369 | return rc; | |
3979877e | 370 | |
9ac00b7d SF |
371 | /* No domain field in LANMAN case. Domain is |
372 | returned by old servers in the SMB negprot response */ | |
373 | /* BB For newer servers which do not support Unicode, | |
374 | but thus do return domain here we could add parsing | |
375 | for it later, but it is not very important */ | |
790fe579 | 376 | cFYI(1, ("ascii: bytes left %d", bleft)); |
3979877e SF |
377 | |
378 | return rc; | |
379 | } | |
380 | ||
0b3cc858 SF |
381 | static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
382 | struct cifsSesInfo *ses) | |
383 | { | |
384 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; | |
385 | ||
386 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
387 | cERROR(1, ("challenge blob len %d too small", blob_len)); | |
388 | return -EINVAL; | |
389 | } | |
390 | ||
391 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
392 | cERROR(1, ("blob signature incorrect %s", pblob->Signature)); | |
393 | return -EINVAL; | |
394 | } | |
395 | if (pblob->MessageType != NtLmChallenge) { | |
396 | cERROR(1, ("Incorrect message type %d", pblob->MessageType)); | |
397 | return -EINVAL; | |
398 | } | |
399 | ||
400 | memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); | |
401 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ | |
402 | /* In particular we can examine sign flags */ | |
403 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
404 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
410 | /* BB Move to ntlmssp.c eventually */ | |
411 | ||
412 | /* We do not malloc the blob, it is passed in pbuffer, because | |
413 | it is fixed size, and small, making this approach cleaner */ | |
414 | static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, | |
415 | struct cifsSesInfo *ses) | |
416 | { | |
417 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; | |
418 | __u32 flags; | |
419 | ||
420 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
421 | sec_blob->MessageType = NtLmNegotiate; | |
422 | ||
423 | /* BB is NTLMV2 session security format easier to use here? */ | |
424 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
425 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
426 | NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM; | |
427 | if (ses->server->secMode & | |
428 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
429 | flags |= NTLMSSP_NEGOTIATE_SIGN; | |
430 | if (ses->server->secMode & SECMODE_SIGN_REQUIRED) | |
431 | flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; | |
432 | ||
433 | sec_blob->NegotiateFlags |= cpu_to_le32(flags); | |
434 | ||
435 | sec_blob->WorkstationName.BufferOffset = 0; | |
436 | sec_blob->WorkstationName.Length = 0; | |
437 | sec_blob->WorkstationName.MaximumLength = 0; | |
438 | ||
439 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
440 | sec_blob->DomainName.BufferOffset = 0; | |
441 | sec_blob->DomainName.Length = 0; | |
442 | sec_blob->DomainName.MaximumLength = 0; | |
443 | } | |
444 | ||
445 | /* We do not malloc the blob, it is passed in pbuffer, because its | |
446 | maximum possible size is fixed and small, making this approach cleaner. | |
447 | This function returns the length of the data in the blob */ | |
448 | static int build_ntlmssp_auth_blob(unsigned char *pbuffer, | |
449 | struct cifsSesInfo *ses, | |
450 | const struct nls_table *nls_cp, int first) | |
451 | { | |
452 | AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer; | |
453 | __u32 flags; | |
454 | unsigned char *tmp; | |
455 | char ntlm_session_key[CIFS_SESS_KEY_SIZE]; | |
456 | ||
457 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
458 | sec_blob->MessageType = NtLmAuthenticate; | |
459 | ||
460 | flags = NTLMSSP_NEGOTIATE_56 | | |
461 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
462 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
463 | NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM; | |
464 | if (ses->server->secMode & | |
465 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
466 | flags |= NTLMSSP_NEGOTIATE_SIGN; | |
467 | if (ses->server->secMode & SECMODE_SIGN_REQUIRED) | |
468 | flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; | |
469 | ||
470 | tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE); | |
471 | sec_blob->NegotiateFlags |= cpu_to_le32(flags); | |
472 | ||
473 | sec_blob->LmChallengeResponse.BufferOffset = | |
474 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
475 | sec_blob->LmChallengeResponse.Length = 0; | |
476 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
477 | ||
478 | /* calculate session key, BB what about adding similar ntlmv2 path? */ | |
479 | SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key); | |
480 | if (first) | |
481 | cifs_calculate_mac_key(&ses->server->mac_signing_key, | |
482 | ntlm_session_key, ses->password); | |
483 | ||
484 | memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE); | |
485 | sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
486 | sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE); | |
487 | sec_blob->NtChallengeResponse.MaximumLength = | |
488 | cpu_to_le16(CIFS_SESS_KEY_SIZE); | |
489 | ||
490 | tmp += CIFS_SESS_KEY_SIZE; | |
491 | ||
492 | if (ses->domainName == NULL) { | |
493 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
494 | sec_blob->DomainName.Length = 0; | |
495 | sec_blob->DomainName.MaximumLength = 0; | |
496 | tmp += 2; | |
497 | } else { | |
498 | int len; | |
499 | len = cifs_strtoUCS((__le16 *)tmp, ses->domainName, | |
500 | MAX_USERNAME_SIZE, nls_cp); | |
501 | len *= 2; /* unicode is 2 bytes each */ | |
502 | len += 2; /* trailing null */ | |
503 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
504 | sec_blob->DomainName.Length = cpu_to_le16(len); | |
505 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
506 | tmp += len; | |
507 | } | |
508 | ||
509 | if (ses->userName == NULL) { | |
510 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
511 | sec_blob->UserName.Length = 0; | |
512 | sec_blob->UserName.MaximumLength = 0; | |
513 | tmp += 2; | |
514 | } else { | |
515 | int len; | |
516 | len = cifs_strtoUCS((__le16 *)tmp, ses->userName, | |
517 | MAX_USERNAME_SIZE, nls_cp); | |
518 | len *= 2; /* unicode is 2 bytes each */ | |
519 | len += 2; /* trailing null */ | |
520 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
521 | sec_blob->UserName.Length = cpu_to_le16(len); | |
522 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
523 | tmp += len; | |
524 | } | |
525 | ||
526 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
527 | sec_blob->WorkstationName.Length = 0; | |
528 | sec_blob->WorkstationName.MaximumLength = 0; | |
529 | tmp += 2; | |
530 | ||
531 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
532 | sec_blob->SessionKey.Length = 0; | |
533 | sec_blob->SessionKey.MaximumLength = 0; | |
534 | return tmp - pbuffer; | |
535 | } | |
536 | ||
537 | ||
538 | static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB, | |
539 | struct cifsSesInfo *ses) | |
540 | { | |
541 | build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses); | |
542 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
543 | ||
544 | return; | |
545 | } | |
546 | ||
547 | static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB, | |
548 | struct cifsSesInfo *ses, | |
549 | const struct nls_table *nls, int first_time) | |
550 | { | |
551 | int bloblen; | |
552 | ||
553 | bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls, | |
554 | first_time); | |
555 | pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen); | |
556 | ||
557 | return bloblen; | |
558 | } | |
559 | #endif | |
560 | ||
790fe579 | 561 | int |
3979877e SF |
562 | CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time, |
563 | const struct nls_table *nls_cp) | |
564 | { | |
565 | int rc = 0; | |
566 | int wct; | |
3979877e SF |
567 | struct smb_hdr *smb_buf; |
568 | char *bcc_ptr; | |
750d1151 | 569 | char *str_area; |
3979877e SF |
570 | SESSION_SETUP_ANDX *pSMB; |
571 | __u32 capabilities; | |
572 | int count; | |
2442421b SF |
573 | int resp_buf_type; |
574 | struct kvec iov[3]; | |
3979877e SF |
575 | enum securityEnum type; |
576 | __u16 action; | |
577 | int bytes_remaining; | |
2442421b | 578 | struct key *spnego_key = NULL; |
0b3cc858 | 579 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
254e55ed | 580 | |
790fe579 | 581 | if (ses == NULL) |
3979877e SF |
582 | return -EINVAL; |
583 | ||
584 | type = ses->server->secType; | |
f40c5628 | 585 | |
790fe579 | 586 | cFYI(1, ("sess setup type %d", type)); |
0b3cc858 SF |
587 | ssetup_ntlmssp_authenticate: |
588 | if (phase == NtLmChallenge) | |
589 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
590 | ||
790fe579 | 591 | if (type == LANMAN) { |
3979877e SF |
592 | #ifndef CONFIG_CIFS_WEAK_PW_HASH |
593 | /* LANMAN and plaintext are less secure and off by default. | |
594 | So we make this explicitly be turned on in kconfig (in the | |
595 | build) and turned on at runtime (changed from the default) | |
596 | in proc/fs/cifs or via mount parm. Unfortunately this is | |
597 | needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
598 | return -EOPNOTSUPP; | |
599 | #endif | |
600 | wct = 10; /* lanman 2 style sessionsetup */ | |
790fe579 | 601 | } else if ((type == NTLM) || (type == NTLMv2)) { |
9312f675 | 602 | /* For NTLMv2 failures eventually may need to retry NTLM */ |
3979877e | 603 | wct = 13; /* old style NTLM sessionsetup */ |
790fe579 | 604 | } else /* same size: negotiate or auth, NTLMSSP or extended security */ |
3979877e SF |
605 | wct = 12; |
606 | ||
607 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
608 | (void **)&smb_buf); | |
790fe579 | 609 | if (rc) |
3979877e SF |
610 | return rc; |
611 | ||
612 | pSMB = (SESSION_SETUP_ANDX *)smb_buf; | |
613 | ||
614 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
750d1151 | 615 | |
2442421b SF |
616 | /* we will send the SMB in three pieces: |
617 | a fixed length beginning part, an optional | |
618 | SPNEGO blob (which can be zero length), and a | |
619 | last part which will include the strings | |
620 | and rest of bcc area. This allows us to avoid | |
621 | a large buffer 17K allocation */ | |
790fe579 SF |
622 | iov[0].iov_base = (char *)pSMB; |
623 | iov[0].iov_len = smb_buf->smb_buf_length + 4; | |
750d1151 | 624 | |
2442421b SF |
625 | /* setting this here allows the code at the end of the function |
626 | to free the request buffer if there's an error */ | |
627 | resp_buf_type = CIFS_SMALL_BUFFER; | |
628 | ||
750d1151 SF |
629 | /* 2000 big enough to fit max user, domain, NOS name etc. */ |
630 | str_area = kmalloc(2000, GFP_KERNEL); | |
5e6e6232 | 631 | if (str_area == NULL) { |
2442421b SF |
632 | rc = -ENOMEM; |
633 | goto ssetup_exit; | |
5e6e6232 | 634 | } |
750d1151 | 635 | bcc_ptr = str_area; |
3979877e | 636 | |
9ac00b7d SF |
637 | ses->flags &= ~CIFS_SES_LANMAN; |
638 | ||
2442421b SF |
639 | iov[1].iov_base = NULL; |
640 | iov[1].iov_len = 0; | |
641 | ||
790fe579 | 642 | if (type == LANMAN) { |
3979877e | 643 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
7c7b25bc | 644 | char lnm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e | 645 | |
c76da9da SF |
646 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; |
647 | ||
3979877e SF |
648 | /* no capabilities flags in old lanman negotiation */ |
649 | ||
790fe579 | 650 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e SF |
651 | /* BB calculate hash with password */ |
652 | /* and copy into bcc */ | |
653 | ||
4e53a3fb JL |
654 | calc_lanman_hash(ses->password, ses->server->cryptKey, |
655 | ses->server->secMode & SECMODE_PW_ENCRYPT ? | |
656 | true : false, lnm_session_key); | |
657 | ||
790fe579 | 658 | ses->flags |= CIFS_SES_LANMAN; |
7c7b25bc SF |
659 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); |
660 | bcc_ptr += CIFS_SESS_KEY_SIZE; | |
3979877e SF |
661 | |
662 | /* can not sign if LANMAN negotiated so no need | |
663 | to calculate signing key? but what if server | |
664 | changed to do higher than lanman dialect and | |
665 | we reconnected would we ever calc signing_key? */ | |
666 | ||
790fe579 | 667 | cFYI(1, ("Negotiating LANMAN setting up strings")); |
3979877e SF |
668 | /* Unicode not allowed for LANMAN dialects */ |
669 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
790fe579 | 670 | #endif |
3979877e | 671 | } else if (type == NTLM) { |
7c7b25bc | 672 | char ntlm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e SF |
673 | |
674 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
675 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
7c7b25bc | 676 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e | 677 | pSMB->req_no_secext.CaseSensitivePasswordLength = |
7c7b25bc | 678 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
50c2f753 | 679 | |
3979877e SF |
680 | /* calculate session key */ |
681 | SMBNTencrypt(ses->password, ses->server->cryptKey, | |
682 | ntlm_session_key); | |
683 | ||
790fe579 | 684 | if (first_time) /* should this be moved into common code |
3979877e | 685 | with similar ntlmv2 path? */ |
b609f06a | 686 | cifs_calculate_mac_key(&ses->server->mac_signing_key, |
3979877e SF |
687 | ntlm_session_key, ses->password); |
688 | /* copy session key */ | |
689 | ||
790fe579 | 690 | memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); |
7c7b25bc | 691 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
790fe579 | 692 | memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); |
7c7b25bc | 693 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
790fe579 | 694 | if (ses->capabilities & CAP_UNICODE) { |
0223cf0b SF |
695 | /* unicode strings must be word aligned */ |
696 | if (iov[0].iov_len % 2) { | |
697 | *bcc_ptr = 0; | |
790fe579 SF |
698 | bcc_ptr++; |
699 | } | |
7c7b25bc | 700 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 701 | } else |
7c7b25bc SF |
702 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
703 | } else if (type == NTLMv2) { | |
790fe579 | 704 | char *v2_sess_key = |
6d027cfd | 705 | kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL); |
f64b23ae SF |
706 | |
707 | /* BB FIXME change all users of v2_sess_key to | |
708 | struct ntlmv2_resp */ | |
7c7b25bc | 709 | |
790fe579 | 710 | if (v2_sess_key == NULL) { |
2442421b SF |
711 | rc = -ENOMEM; |
712 | goto ssetup_exit; | |
7c7b25bc SF |
713 | } |
714 | ||
715 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
716 | ||
717 | /* LM2 password would be here if we supported it */ | |
718 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
719 | /* cpu_to_le16(LM2_SESS_KEY_SIZE); */ | |
720 | ||
721 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
f64b23ae | 722 | cpu_to_le16(sizeof(struct ntlmv2_resp)); |
7c7b25bc SF |
723 | |
724 | /* calculate session key */ | |
1717ffc5 | 725 | setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp); |
790fe579 SF |
726 | if (first_time) /* should this be moved into common code |
727 | with similar ntlmv2 path? */ | |
7c7b25bc SF |
728 | /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key, |
729 | response BB FIXME, v2_sess_key); */ | |
730 | ||
731 | /* copy session key */ | |
732 | ||
733 | /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE); | |
734 | bcc_ptr += LM2_SESS_KEY_SIZE; */ | |
3870253e SF |
735 | memcpy(bcc_ptr, (char *)v2_sess_key, |
736 | sizeof(struct ntlmv2_resp)); | |
f64b23ae SF |
737 | bcc_ptr += sizeof(struct ntlmv2_resp); |
738 | kfree(v2_sess_key); | |
790fe579 SF |
739 | if (ses->capabilities & CAP_UNICODE) { |
740 | if (iov[0].iov_len % 2) { | |
0223cf0b | 741 | *bcc_ptr = 0; |
26f57364 SF |
742 | bcc_ptr++; |
743 | } | |
3979877e | 744 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 745 | } else |
3979877e | 746 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
c16fefa5 | 747 | } else if (type == Kerberos || type == MSKerberos) { |
2442421b SF |
748 | #ifdef CONFIG_CIFS_UPCALL |
749 | struct cifs_spnego_msg *msg; | |
750 | spnego_key = cifs_get_spnego_key(ses); | |
751 | if (IS_ERR(spnego_key)) { | |
752 | rc = PTR_ERR(spnego_key); | |
753 | spnego_key = NULL; | |
754 | goto ssetup_exit; | |
755 | } | |
756 | ||
757 | msg = spnego_key->payload.data; | |
6ce5eecb SF |
758 | /* check version field to make sure that cifs.upcall is |
759 | sending us a response in an expected form */ | |
760 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
761 | cERROR(1, ("incorrect version of cifs.upcall (expected" | |
762 | " %d but got %d)", | |
763 | CIFS_SPNEGO_UPCALL_VERSION, msg->version)); | |
764 | rc = -EKEYREJECTED; | |
765 | goto ssetup_exit; | |
766 | } | |
2442421b SF |
767 | /* bail out if key is too long */ |
768 | if (msg->sesskey_len > | |
769 | sizeof(ses->server->mac_signing_key.data.krb5)) { | |
770 | cERROR(1, ("Kerberos signing key too long (%u bytes)", | |
771 | msg->sesskey_len)); | |
772 | rc = -EOVERFLOW; | |
773 | goto ssetup_exit; | |
774 | } | |
1a67570c JL |
775 | if (first_time) { |
776 | ses->server->mac_signing_key.len = msg->sesskey_len; | |
777 | memcpy(ses->server->mac_signing_key.data.krb5, | |
778 | msg->data, msg->sesskey_len); | |
779 | } | |
3979877e SF |
780 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
781 | capabilities |= CAP_EXTENDED_SECURITY; | |
782 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
2442421b SF |
783 | iov[1].iov_base = msg->data + msg->sesskey_len; |
784 | iov[1].iov_len = msg->secblob_len; | |
785 | pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len); | |
786 | ||
787 | if (ses->capabilities & CAP_UNICODE) { | |
788 | /* unicode strings must be word aligned */ | |
28c5a02a | 789 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { |
2442421b SF |
790 | *bcc_ptr = 0; |
791 | bcc_ptr++; | |
792 | } | |
793 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
794 | unicode_domain_string(&bcc_ptr, ses, nls_cp); | |
795 | } else | |
796 | /* BB: is this right? */ | |
797 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
798 | #else /* ! CONFIG_CIFS_UPCALL */ | |
799 | cERROR(1, ("Kerberos negotiated but upcall support disabled!")); | |
800 | rc = -ENOSYS; | |
801 | goto ssetup_exit; | |
802 | #endif /* CONFIG_CIFS_UPCALL */ | |
803 | } else { | |
0b3cc858 | 804 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
f46c7234 | 805 | if (type == RawNTLMSSP) { |
0b3cc858 SF |
806 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { |
807 | cERROR(1, ("NTLMSSP requires Unicode support")); | |
808 | rc = -ENOSYS; | |
809 | goto ssetup_exit; | |
810 | } | |
811 | ||
812 | cFYI(1, ("ntlmssp session setup phase %d", phase)); | |
813 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
814 | capabilities |= CAP_EXTENDED_SECURITY; | |
815 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
816 | if (phase == NtLmNegotiate) { | |
817 | setup_ntlmssp_neg_req(pSMB, ses); | |
818 | iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
819 | } else if (phase == NtLmAuthenticate) { | |
820 | int blob_len; | |
821 | blob_len = setup_ntlmssp_auth_req(pSMB, ses, | |
822 | nls_cp, | |
823 | first_time); | |
824 | iov[1].iov_len = blob_len; | |
844823cb SF |
825 | /* Make sure that we tell the server that we |
826 | are using the uid that it just gave us back | |
827 | on the response (challenge) */ | |
828 | smb_buf->Uid = ses->Suid; | |
0b3cc858 SF |
829 | } else { |
830 | cERROR(1, ("invalid phase %d", phase)); | |
831 | rc = -ENOSYS; | |
832 | goto ssetup_exit; | |
833 | } | |
834 | iov[1].iov_base = &pSMB->req.SecurityBlob[0]; | |
835 | /* unicode strings must be word aligned */ | |
836 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { | |
837 | *bcc_ptr = 0; | |
838 | bcc_ptr++; | |
839 | } | |
840 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
841 | } else { | |
842 | cERROR(1, ("secType %d not supported!", type)); | |
843 | rc = -ENOSYS; | |
844 | goto ssetup_exit; | |
845 | } | |
846 | #else | |
2442421b SF |
847 | cERROR(1, ("secType %d not supported!", type)); |
848 | rc = -ENOSYS; | |
849 | goto ssetup_exit; | |
0b3cc858 | 850 | #endif |
3979877e SF |
851 | } |
852 | ||
2442421b SF |
853 | iov[2].iov_base = str_area; |
854 | iov[2].iov_len = (long) bcc_ptr - (long) str_area; | |
855 | ||
856 | count = iov[1].iov_len + iov[2].iov_len; | |
3979877e SF |
857 | smb_buf->smb_buf_length += count; |
858 | ||
3979877e SF |
859 | BCC_LE(smb_buf) = cpu_to_le16(count); |
860 | ||
2442421b | 861 | rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type, |
133672ef | 862 | CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR); |
3979877e SF |
863 | /* SMB request buf freed in SendReceive2 */ |
864 | ||
790fe579 | 865 | cFYI(1, ("ssetup rc from sendrecv2 is %d", rc)); |
3979877e SF |
866 | |
867 | pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; | |
868 | smb_buf = (struct smb_hdr *)iov[0].iov_base; | |
869 | ||
0b3cc858 SF |
870 | if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError == |
871 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) { | |
872 | if (phase != NtLmNegotiate) { | |
873 | cERROR(1, ("Unexpected more processing error")); | |
874 | goto ssetup_exit; | |
875 | } | |
876 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
877 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
878 | rc = 0; /* MORE_PROC rc is not an error here, but expected */ | |
879 | } | |
880 | if (rc) | |
881 | goto ssetup_exit; | |
882 | ||
790fe579 | 883 | if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) { |
3979877e | 884 | rc = -EIO; |
790fe579 | 885 | cERROR(1, ("bad word count %d", smb_buf->WordCount)); |
3979877e SF |
886 | goto ssetup_exit; |
887 | } | |
888 | action = le16_to_cpu(pSMB->resp.Action); | |
889 | if (action & GUEST_LOGIN) | |
189acaae | 890 | cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */ |
3979877e SF |
891 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
892 | cFYI(1, ("UID = %d ", ses->Suid)); | |
893 | /* response can have either 3 or 4 word count - Samba sends 3 */ | |
894 | /* and lanman response is 3 */ | |
895 | bytes_remaining = BCC(smb_buf); | |
896 | bcc_ptr = pByteArea(smb_buf); | |
897 | ||
790fe579 | 898 | if (smb_buf->WordCount == 4) { |
3979877e SF |
899 | __u16 blob_len; |
900 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
790fe579 SF |
901 | if (blob_len > bytes_remaining) { |
902 | cERROR(1, ("bad security blob length %d", blob_len)); | |
3979877e SF |
903 | rc = -EINVAL; |
904 | goto ssetup_exit; | |
905 | } | |
0b3cc858 SF |
906 | if (phase == NtLmChallenge) { |
907 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); | |
908 | /* now goto beginning for ntlmssp authenticate phase */ | |
909 | if (rc) | |
910 | goto ssetup_exit; | |
911 | } | |
912 | bcc_ptr += blob_len; | |
3979877e | 913 | bytes_remaining -= blob_len; |
790fe579 | 914 | } |
3979877e SF |
915 | |
916 | /* BB check if Unicode and decode strings */ | |
27b87fe5 JL |
917 | if (smb_buf->Flags2 & SMBFLG2_UNICODE) { |
918 | /* unicode string area must be word-aligned */ | |
919 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
920 | ++bcc_ptr; | |
921 | --bytes_remaining; | |
922 | } | |
59140797 | 923 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp); |
27b87fe5 | 924 | } else { |
63135e08 SF |
925 | rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining, |
926 | ses, nls_cp); | |
27b87fe5 | 927 | } |
50c2f753 | 928 | |
3979877e | 929 | ssetup_exit: |
dfd15c46 JL |
930 | if (spnego_key) { |
931 | key_revoke(spnego_key); | |
2442421b | 932 | key_put(spnego_key); |
dfd15c46 | 933 | } |
750d1151 | 934 | kfree(str_area); |
790fe579 SF |
935 | if (resp_buf_type == CIFS_SMALL_BUFFER) { |
936 | cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base)); | |
3979877e | 937 | cifs_small_buf_release(iov[0].iov_base); |
790fe579 | 938 | } else if (resp_buf_type == CIFS_LARGE_BUFFER) |
3979877e SF |
939 | cifs_buf_release(iov[0].iov_base); |
940 | ||
0b3cc858 SF |
941 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
942 | if ((phase == NtLmChallenge) && (rc == 0)) | |
943 | goto ssetup_ntlmssp_authenticate; | |
944 | ||
3979877e SF |
945 | return rc; |
946 | } |