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3979877e SF |
1 | /* |
2 | * fs/cifs/sess.c | |
3 | * | |
4 | * SMB/CIFS session setup handling routines | |
5 | * | |
d185cda7 | 6 | * Copyright (c) International Business Machines Corp., 2006, 2009 |
3979877e SF |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include "cifspdu.h" | |
25 | #include "cifsglob.h" | |
26 | #include "cifsproto.h" | |
27 | #include "cifs_unicode.h" | |
28 | #include "cifs_debug.h" | |
29 | #include "ntlmssp.h" | |
30 | #include "nterr.h" | |
9c53588e | 31 | #include <linux/utsname.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
2442421b | 33 | #include "cifs_spnego.h" |
3979877e | 34 | |
3979877e | 35 | extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, |
790fe579 | 36 | unsigned char *p24); |
3979877e | 37 | |
ebe6aa5a JL |
38 | /* |
39 | * Checks if this is the first smb session to be reconnected after | |
40 | * the socket has been reestablished (so we know whether to use vc 0). | |
41 | * Called while holding the cifs_tcp_ses_lock, so do not block | |
42 | */ | |
eca6acf9 SF |
43 | static bool is_first_ses_reconnect(struct cifsSesInfo *ses) |
44 | { | |
45 | struct list_head *tmp; | |
46 | struct cifsSesInfo *tmp_ses; | |
47 | ||
48 | list_for_each(tmp, &ses->server->smb_ses_list) { | |
49 | tmp_ses = list_entry(tmp, struct cifsSesInfo, | |
50 | smb_ses_list); | |
51 | if (tmp_ses->need_reconnect == false) | |
52 | return false; | |
53 | } | |
54 | /* could not find a session that was already connected, | |
55 | this must be the first one we are reconnecting */ | |
56 | return true; | |
57 | } | |
58 | ||
59 | /* | |
60 | * vc number 0 is treated specially by some servers, and should be the | |
61 | * first one we request. After that we can use vcnumbers up to maxvcs, | |
62 | * one for each smb session (some Windows versions set maxvcs incorrectly | |
63 | * so maxvc=1 can be ignored). If we have too many vcs, we can reuse | |
64 | * any vc but zero (some servers reset the connection on vcnum zero) | |
65 | * | |
66 | */ | |
67 | static __le16 get_next_vcnum(struct cifsSesInfo *ses) | |
68 | { | |
69 | __u16 vcnum = 0; | |
70 | struct list_head *tmp; | |
71 | struct cifsSesInfo *tmp_ses; | |
72 | __u16 max_vcs = ses->server->max_vcs; | |
73 | __u16 i; | |
74 | int free_vc_found = 0; | |
75 | ||
76 | /* Quoting the MS-SMB specification: "Windows-based SMB servers set this | |
77 | field to one but do not enforce this limit, which allows an SMB client | |
78 | to establish more virtual circuits than allowed by this value ... but | |
79 | other server implementations can enforce this limit." */ | |
80 | if (max_vcs < 2) | |
81 | max_vcs = 0xFFFF; | |
82 | ||
83 | write_lock(&cifs_tcp_ses_lock); | |
84 | if ((ses->need_reconnect) && is_first_ses_reconnect(ses)) | |
85 | goto get_vc_num_exit; /* vcnum will be zero */ | |
86 | for (i = ses->server->srv_count - 1; i < max_vcs; i++) { | |
87 | if (i == 0) /* this is the only connection, use vc 0 */ | |
88 | break; | |
89 | ||
90 | free_vc_found = 1; | |
91 | ||
92 | list_for_each(tmp, &ses->server->smb_ses_list) { | |
93 | tmp_ses = list_entry(tmp, struct cifsSesInfo, | |
94 | smb_ses_list); | |
95 | if (tmp_ses->vcnum == i) { | |
96 | free_vc_found = 0; | |
97 | break; /* found duplicate, try next vcnum */ | |
98 | } | |
99 | } | |
100 | if (free_vc_found) | |
101 | break; /* we found a vcnumber that will work - use it */ | |
102 | } | |
103 | ||
104 | if (i == 0) | |
105 | vcnum = 0; /* for most common case, ie if one smb session, use | |
106 | vc zero. Also for case when no free vcnum, zero | |
107 | is safest to send (some clients only send zero) */ | |
108 | else if (free_vc_found == 0) | |
109 | vcnum = 1; /* we can not reuse vc=0 safely, since some servers | |
110 | reset all uids on that, but 1 is ok. */ | |
111 | else | |
112 | vcnum = i; | |
113 | ses->vcnum = vcnum; | |
114 | get_vc_num_exit: | |
115 | write_unlock(&cifs_tcp_ses_lock); | |
116 | ||
051a2a0d | 117 | return cpu_to_le16(vcnum); |
eca6acf9 SF |
118 | } |
119 | ||
3979877e SF |
120 | static __u32 cifs_ssetup_hdr(struct cifsSesInfo *ses, SESSION_SETUP_ANDX *pSMB) |
121 | { | |
122 | __u32 capabilities = 0; | |
123 | ||
124 | /* init fields common to all four types of SessSetup */ | |
eca6acf9 SF |
125 | /* Note that offsets for first seven fields in req struct are same */ |
126 | /* in CIFS Specs so does not matter which of 3 forms of struct */ | |
127 | /* that we use in next few lines */ | |
128 | /* Note that header is initialized to zero in header_assemble */ | |
3979877e SF |
129 | pSMB->req.AndXCommand = 0xFF; |
130 | pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf); | |
131 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); | |
eca6acf9 | 132 | pSMB->req.VcNumber = get_next_vcnum(ses); |
3979877e SF |
133 | |
134 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
135 | ||
790fe579 | 136 | /* BB verify whether signing required on neg or just on auth frame |
3979877e SF |
137 | (and NTLM case) */ |
138 | ||
139 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
140 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
141 | ||
790fe579 SF |
142 | if (ses->server->secMode & |
143 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
3979877e SF |
144 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
145 | ||
146 | if (ses->capabilities & CAP_UNICODE) { | |
147 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
148 | capabilities |= CAP_UNICODE; | |
149 | } | |
150 | if (ses->capabilities & CAP_STATUS32) { | |
151 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
152 | capabilities |= CAP_STATUS32; | |
153 | } | |
154 | if (ses->capabilities & CAP_DFS) { | |
155 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
156 | capabilities |= CAP_DFS; | |
157 | } | |
26f57364 | 158 | if (ses->capabilities & CAP_UNIX) |
3979877e | 159 | capabilities |= CAP_UNIX; |
3979877e | 160 | |
3979877e SF |
161 | return capabilities; |
162 | } | |
163 | ||
0d3a01fa JL |
164 | static void |
165 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
166 | { | |
167 | char *bcc_ptr = *pbcc_area; | |
168 | int bytes_ret = 0; | |
169 | ||
170 | /* Copy OS version */ | |
171 | bytes_ret = cifs_strtoUCS((__le16 *)bcc_ptr, "Linux version ", 32, | |
172 | nls_cp); | |
173 | bcc_ptr += 2 * bytes_ret; | |
174 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, init_utsname()->release, | |
175 | 32, nls_cp); | |
176 | bcc_ptr += 2 * bytes_ret; | |
177 | bcc_ptr += 2; /* trailing null */ | |
178 | ||
179 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, | |
180 | 32, nls_cp); | |
181 | bcc_ptr += 2 * bytes_ret; | |
182 | bcc_ptr += 2; /* trailing null */ | |
183 | ||
184 | *pbcc_area = bcc_ptr; | |
185 | } | |
186 | ||
187 | static void unicode_domain_string(char **pbcc_area, struct cifsSesInfo *ses, | |
188 | const struct nls_table *nls_cp) | |
189 | { | |
190 | char *bcc_ptr = *pbcc_area; | |
191 | int bytes_ret = 0; | |
192 | ||
193 | /* copy domain */ | |
194 | if (ses->domainName == NULL) { | |
195 | /* Sending null domain better than using a bogus domain name (as | |
196 | we did briefly in 2.6.18) since server will use its default */ | |
197 | *bcc_ptr = 0; | |
198 | *(bcc_ptr+1) = 0; | |
199 | bytes_ret = 0; | |
200 | } else | |
201 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->domainName, | |
202 | 256, nls_cp); | |
203 | bcc_ptr += 2 * bytes_ret; | |
204 | bcc_ptr += 2; /* account for null terminator */ | |
205 | ||
206 | *pbcc_area = bcc_ptr; | |
207 | } | |
208 | ||
209 | ||
3870253e | 210 | static void unicode_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, |
790fe579 | 211 | const struct nls_table *nls_cp) |
3979877e | 212 | { |
790fe579 | 213 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
214 | int bytes_ret = 0; |
215 | ||
216 | /* BB FIXME add check that strings total less | |
217 | than 335 or will need to send them as arrays */ | |
218 | ||
0223cf0b SF |
219 | /* unicode strings, must be word aligned before the call */ |
220 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
221 | *bcc_ptr = 0; |
222 | bcc_ptr++; | |
0223cf0b | 223 | } */ |
3979877e | 224 | /* copy user */ |
790fe579 | 225 | if (ses->userName == NULL) { |
6e659c63 SF |
226 | /* null user mount */ |
227 | *bcc_ptr = 0; | |
228 | *(bcc_ptr+1) = 0; | |
301a6a31 | 229 | } else { |
3979877e | 230 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName, |
301a6a31 | 231 | MAX_USERNAME_SIZE, nls_cp); |
3979877e SF |
232 | } |
233 | bcc_ptr += 2 * bytes_ret; | |
234 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 235 | |
0d3a01fa JL |
236 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
237 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
238 | |
239 | *pbcc_area = bcc_ptr; | |
240 | } | |
241 | ||
3870253e | 242 | static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, |
790fe579 | 243 | const struct nls_table *nls_cp) |
3979877e | 244 | { |
790fe579 | 245 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
246 | |
247 | /* copy user */ | |
248 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 SF |
249 | /* copy user */ |
250 | if (ses->userName == NULL) { | |
251 | /* BB what about null user mounts - check that we do this BB */ | |
301a6a31 SF |
252 | } else { |
253 | strncpy(bcc_ptr, ses->userName, MAX_USERNAME_SIZE); | |
790fe579 | 254 | } |
301a6a31 | 255 | bcc_ptr += strnlen(ses->userName, MAX_USERNAME_SIZE); |
3979877e | 256 | *bcc_ptr = 0; |
790fe579 | 257 | bcc_ptr++; /* account for null termination */ |
3979877e | 258 | |
790fe579 SF |
259 | /* copy domain */ |
260 | ||
261 | if (ses->domainName != NULL) { | |
262 | strncpy(bcc_ptr, ses->domainName, 256); | |
3979877e | 263 | bcc_ptr += strnlen(ses->domainName, 256); |
790fe579 | 264 | } /* else we will send a null domain name |
6e659c63 | 265 | so the server will default to its own domain */ |
3979877e SF |
266 | *bcc_ptr = 0; |
267 | bcc_ptr++; | |
268 | ||
269 | /* BB check for overflow here */ | |
270 | ||
271 | strcpy(bcc_ptr, "Linux version "); | |
272 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
273 | strcpy(bcc_ptr, init_utsname()->release); |
274 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
275 | |
276 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
277 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
278 | ||
790fe579 | 279 | *pbcc_area = bcc_ptr; |
3979877e SF |
280 | } |
281 | ||
59140797 JL |
282 | static void |
283 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses, | |
284 | const struct nls_table *nls_cp) | |
3979877e | 285 | { |
59140797 | 286 | int len; |
790fe579 | 287 | char *data = *pbcc_area; |
3979877e | 288 | |
b6b38f70 | 289 | cFYI(1, "bleft %d", bleft); |
3979877e | 290 | |
27b87fe5 JL |
291 | /* |
292 | * Windows servers do not always double null terminate their final | |
293 | * Unicode string. Check to see if there are an uneven number of bytes | |
294 | * left. If so, then add an extra NULL pad byte to the end of the | |
295 | * response. | |
296 | * | |
297 | * See section 2.7.2 in "Implementing CIFS" for details | |
298 | */ | |
299 | if (bleft % 2) { | |
300 | data[bleft] = 0; | |
301 | ++bleft; | |
302 | } | |
50c2f753 | 303 | |
26f57364 | 304 | kfree(ses->serverOS); |
d185cda7 | 305 | ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
b6b38f70 | 306 | cFYI(1, "serverOS=%s", ses->serverOS); |
59140797 JL |
307 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
308 | data += len; | |
309 | bleft -= len; | |
310 | if (bleft <= 0) | |
311 | return; | |
3979877e | 312 | |
26f57364 | 313 | kfree(ses->serverNOS); |
d185cda7 | 314 | ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
b6b38f70 | 315 | cFYI(1, "serverNOS=%s", ses->serverNOS); |
59140797 JL |
316 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
317 | data += len; | |
318 | bleft -= len; | |
319 | if (bleft <= 0) | |
320 | return; | |
790fe579 | 321 | |
26f57364 | 322 | kfree(ses->serverDomain); |
d185cda7 | 323 | ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
b6b38f70 | 324 | cFYI(1, "serverDomain=%s", ses->serverDomain); |
790fe579 | 325 | |
59140797 | 326 | return; |
3979877e SF |
327 | } |
328 | ||
790fe579 SF |
329 | static int decode_ascii_ssetup(char **pbcc_area, int bleft, |
330 | struct cifsSesInfo *ses, | |
331 | const struct nls_table *nls_cp) | |
3979877e SF |
332 | { |
333 | int rc = 0; | |
334 | int len; | |
790fe579 | 335 | char *bcc_ptr = *pbcc_area; |
3979877e | 336 | |
b6b38f70 | 337 | cFYI(1, "decode sessetup ascii. bleft %d", bleft); |
50c2f753 | 338 | |
3979877e | 339 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 340 | if (len >= bleft) |
3979877e | 341 | return rc; |
50c2f753 | 342 | |
26f57364 | 343 | kfree(ses->serverOS); |
3979877e SF |
344 | |
345 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 346 | if (ses->serverOS) |
3979877e | 347 | strncpy(ses->serverOS, bcc_ptr, len); |
790fe579 | 348 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) { |
b6b38f70 | 349 | cFYI(1, "OS/2 server"); |
9ac00b7d SF |
350 | ses->flags |= CIFS_SES_OS2; |
351 | } | |
3979877e SF |
352 | |
353 | bcc_ptr += len + 1; | |
354 | bleft -= len + 1; | |
355 | ||
356 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 357 | if (len >= bleft) |
3979877e SF |
358 | return rc; |
359 | ||
26f57364 | 360 | kfree(ses->serverNOS); |
3979877e SF |
361 | |
362 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 363 | if (ses->serverNOS) |
3979877e SF |
364 | strncpy(ses->serverNOS, bcc_ptr, len); |
365 | ||
366 | bcc_ptr += len + 1; | |
367 | bleft -= len + 1; | |
368 | ||
790fe579 SF |
369 | len = strnlen(bcc_ptr, bleft); |
370 | if (len > bleft) | |
371 | return rc; | |
3979877e | 372 | |
9ac00b7d SF |
373 | /* No domain field in LANMAN case. Domain is |
374 | returned by old servers in the SMB negprot response */ | |
375 | /* BB For newer servers which do not support Unicode, | |
376 | but thus do return domain here we could add parsing | |
377 | for it later, but it is not very important */ | |
b6b38f70 | 378 | cFYI(1, "ascii: bytes left %d", bleft); |
3979877e SF |
379 | |
380 | return rc; | |
381 | } | |
382 | ||
0b3cc858 SF |
383 | static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
384 | struct cifsSesInfo *ses) | |
385 | { | |
386 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; | |
387 | ||
388 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
b6b38f70 | 389 | cERROR(1, "challenge blob len %d too small", blob_len); |
0b3cc858 SF |
390 | return -EINVAL; |
391 | } | |
392 | ||
393 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
b6b38f70 | 394 | cERROR(1, "blob signature incorrect %s", pblob->Signature); |
0b3cc858 SF |
395 | return -EINVAL; |
396 | } | |
397 | if (pblob->MessageType != NtLmChallenge) { | |
b6b38f70 | 398 | cERROR(1, "Incorrect message type %d", pblob->MessageType); |
0b3cc858 SF |
399 | return -EINVAL; |
400 | } | |
401 | ||
402 | memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); | |
403 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ | |
404 | /* In particular we can examine sign flags */ | |
405 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
406 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
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 */ | |
416 | static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, | |
417 | struct cifsSesInfo *ses) | |
418 | { | |
419 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; | |
420 | __u32 flags; | |
421 | ||
422 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
423 | sec_blob->MessageType = NtLmNegotiate; | |
424 | ||
425 | /* BB is NTLMV2 session security format easier to use here? */ | |
426 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
427 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
428 | NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM; | |
429 | if (ses->server->secMode & | |
430 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
431 | flags |= NTLMSSP_NEGOTIATE_SIGN; | |
432 | if (ses->server->secMode & SECMODE_SIGN_REQUIRED) | |
433 | flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; | |
434 | ||
435 | sec_blob->NegotiateFlags |= cpu_to_le32(flags); | |
436 | ||
437 | sec_blob->WorkstationName.BufferOffset = 0; | |
438 | sec_blob->WorkstationName.Length = 0; | |
439 | sec_blob->WorkstationName.MaximumLength = 0; | |
440 | ||
441 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
442 | sec_blob->DomainName.BufferOffset = 0; | |
443 | sec_blob->DomainName.Length = 0; | |
444 | sec_blob->DomainName.MaximumLength = 0; | |
445 | } | |
446 | ||
447 | /* We do not malloc the blob, it is passed in pbuffer, because its | |
448 | maximum possible size is fixed and small, making this approach cleaner. | |
449 | This function returns the length of the data in the blob */ | |
450 | static int build_ntlmssp_auth_blob(unsigned char *pbuffer, | |
451 | struct cifsSesInfo *ses, | |
ebe6aa5a | 452 | const struct nls_table *nls_cp, bool first) |
0b3cc858 SF |
453 | { |
454 | AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer; | |
455 | __u32 flags; | |
456 | unsigned char *tmp; | |
457 | char ntlm_session_key[CIFS_SESS_KEY_SIZE]; | |
458 | ||
459 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
460 | sec_blob->MessageType = NtLmAuthenticate; | |
461 | ||
462 | flags = NTLMSSP_NEGOTIATE_56 | | |
463 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
464 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
465 | NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM; | |
466 | if (ses->server->secMode & | |
467 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
468 | flags |= NTLMSSP_NEGOTIATE_SIGN; | |
469 | if (ses->server->secMode & SECMODE_SIGN_REQUIRED) | |
470 | flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; | |
471 | ||
472 | tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE); | |
473 | sec_blob->NegotiateFlags |= cpu_to_le32(flags); | |
474 | ||
475 | sec_blob->LmChallengeResponse.BufferOffset = | |
476 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
477 | sec_blob->LmChallengeResponse.Length = 0; | |
478 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
479 | ||
480 | /* calculate session key, BB what about adding similar ntlmv2 path? */ | |
481 | SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key); | |
482 | if (first) | |
483 | cifs_calculate_mac_key(&ses->server->mac_signing_key, | |
484 | ntlm_session_key, ses->password); | |
485 | ||
486 | memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE); | |
487 | sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
488 | sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE); | |
489 | sec_blob->NtChallengeResponse.MaximumLength = | |
490 | cpu_to_le16(CIFS_SESS_KEY_SIZE); | |
491 | ||
492 | tmp += CIFS_SESS_KEY_SIZE; | |
493 | ||
494 | if (ses->domainName == NULL) { | |
495 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
496 | sec_blob->DomainName.Length = 0; | |
497 | sec_blob->DomainName.MaximumLength = 0; | |
498 | tmp += 2; | |
499 | } else { | |
500 | int len; | |
501 | len = cifs_strtoUCS((__le16 *)tmp, ses->domainName, | |
502 | MAX_USERNAME_SIZE, nls_cp); | |
503 | len *= 2; /* unicode is 2 bytes each */ | |
504 | len += 2; /* trailing null */ | |
505 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
506 | sec_blob->DomainName.Length = cpu_to_le16(len); | |
507 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
508 | tmp += len; | |
509 | } | |
510 | ||
511 | if (ses->userName == NULL) { | |
512 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
513 | sec_blob->UserName.Length = 0; | |
514 | sec_blob->UserName.MaximumLength = 0; | |
515 | tmp += 2; | |
516 | } else { | |
517 | int len; | |
518 | len = cifs_strtoUCS((__le16 *)tmp, ses->userName, | |
519 | MAX_USERNAME_SIZE, nls_cp); | |
520 | len *= 2; /* unicode is 2 bytes each */ | |
521 | len += 2; /* trailing null */ | |
522 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
523 | sec_blob->UserName.Length = cpu_to_le16(len); | |
524 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
525 | tmp += len; | |
526 | } | |
527 | ||
528 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
529 | sec_blob->WorkstationName.Length = 0; | |
530 | sec_blob->WorkstationName.MaximumLength = 0; | |
531 | tmp += 2; | |
532 | ||
533 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
534 | sec_blob->SessionKey.Length = 0; | |
535 | sec_blob->SessionKey.MaximumLength = 0; | |
536 | return tmp - pbuffer; | |
537 | } | |
538 | ||
539 | ||
540 | static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB, | |
541 | struct cifsSesInfo *ses) | |
542 | { | |
543 | build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses); | |
544 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
545 | ||
546 | return; | |
547 | } | |
548 | ||
549 | static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB, | |
550 | struct cifsSesInfo *ses, | |
ebe6aa5a | 551 | const struct nls_table *nls, bool first_time) |
0b3cc858 SF |
552 | { |
553 | int bloblen; | |
554 | ||
555 | bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls, | |
556 | first_time); | |
557 | pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen); | |
558 | ||
559 | return bloblen; | |
560 | } | |
561 | #endif | |
562 | ||
790fe579 | 563 | int |
ebe6aa5a JL |
564 | CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, |
565 | const struct nls_table *nls_cp) | |
3979877e SF |
566 | { |
567 | int rc = 0; | |
568 | int wct; | |
3979877e SF |
569 | struct smb_hdr *smb_buf; |
570 | char *bcc_ptr; | |
750d1151 | 571 | char *str_area; |
3979877e SF |
572 | SESSION_SETUP_ANDX *pSMB; |
573 | __u32 capabilities; | |
574 | int count; | |
2442421b SF |
575 | int resp_buf_type; |
576 | struct kvec iov[3]; | |
3979877e SF |
577 | enum securityEnum type; |
578 | __u16 action; | |
579 | int bytes_remaining; | |
2442421b | 580 | struct key *spnego_key = NULL; |
0b3cc858 | 581 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
ebe6aa5a | 582 | bool first_time; |
254e55ed | 583 | |
790fe579 | 584 | if (ses == NULL) |
3979877e SF |
585 | return -EINVAL; |
586 | ||
ebe6aa5a JL |
587 | read_lock(&cifs_tcp_ses_lock); |
588 | first_time = is_first_ses_reconnect(ses); | |
589 | read_unlock(&cifs_tcp_ses_lock); | |
590 | ||
3979877e | 591 | type = ses->server->secType; |
f40c5628 | 592 | |
b6b38f70 | 593 | cFYI(1, "sess setup type %d", type); |
0b3cc858 SF |
594 | ssetup_ntlmssp_authenticate: |
595 | if (phase == NtLmChallenge) | |
596 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
597 | ||
790fe579 | 598 | if (type == LANMAN) { |
3979877e SF |
599 | #ifndef CONFIG_CIFS_WEAK_PW_HASH |
600 | /* LANMAN and plaintext are less secure and off by default. | |
601 | So we make this explicitly be turned on in kconfig (in the | |
602 | build) and turned on at runtime (changed from the default) | |
603 | in proc/fs/cifs or via mount parm. Unfortunately this is | |
604 | needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
605 | return -EOPNOTSUPP; | |
606 | #endif | |
607 | wct = 10; /* lanman 2 style sessionsetup */ | |
790fe579 | 608 | } else if ((type == NTLM) || (type == NTLMv2)) { |
9312f675 | 609 | /* For NTLMv2 failures eventually may need to retry NTLM */ |
3979877e | 610 | wct = 13; /* old style NTLM sessionsetup */ |
790fe579 | 611 | } else /* same size: negotiate or auth, NTLMSSP or extended security */ |
3979877e SF |
612 | wct = 12; |
613 | ||
614 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
615 | (void **)&smb_buf); | |
790fe579 | 616 | if (rc) |
3979877e SF |
617 | return rc; |
618 | ||
619 | pSMB = (SESSION_SETUP_ANDX *)smb_buf; | |
620 | ||
621 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
750d1151 | 622 | |
2442421b SF |
623 | /* we will send the SMB in three pieces: |
624 | a fixed length beginning part, an optional | |
625 | SPNEGO blob (which can be zero length), and a | |
626 | last part which will include the strings | |
627 | and rest of bcc area. This allows us to avoid | |
628 | a large buffer 17K allocation */ | |
790fe579 SF |
629 | iov[0].iov_base = (char *)pSMB; |
630 | iov[0].iov_len = smb_buf->smb_buf_length + 4; | |
750d1151 | 631 | |
2442421b SF |
632 | /* setting this here allows the code at the end of the function |
633 | to free the request buffer if there's an error */ | |
634 | resp_buf_type = CIFS_SMALL_BUFFER; | |
635 | ||
750d1151 SF |
636 | /* 2000 big enough to fit max user, domain, NOS name etc. */ |
637 | str_area = kmalloc(2000, GFP_KERNEL); | |
5e6e6232 | 638 | if (str_area == NULL) { |
2442421b SF |
639 | rc = -ENOMEM; |
640 | goto ssetup_exit; | |
5e6e6232 | 641 | } |
750d1151 | 642 | bcc_ptr = str_area; |
3979877e | 643 | |
9ac00b7d SF |
644 | ses->flags &= ~CIFS_SES_LANMAN; |
645 | ||
2442421b SF |
646 | iov[1].iov_base = NULL; |
647 | iov[1].iov_len = 0; | |
648 | ||
790fe579 | 649 | if (type == LANMAN) { |
3979877e | 650 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
7c7b25bc | 651 | char lnm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e | 652 | |
c76da9da SF |
653 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; |
654 | ||
3979877e SF |
655 | /* no capabilities flags in old lanman negotiation */ |
656 | ||
790fe579 | 657 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e SF |
658 | /* BB calculate hash with password */ |
659 | /* and copy into bcc */ | |
660 | ||
4e53a3fb JL |
661 | calc_lanman_hash(ses->password, ses->server->cryptKey, |
662 | ses->server->secMode & SECMODE_PW_ENCRYPT ? | |
663 | true : false, lnm_session_key); | |
664 | ||
790fe579 | 665 | ses->flags |= CIFS_SES_LANMAN; |
7c7b25bc SF |
666 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); |
667 | bcc_ptr += CIFS_SESS_KEY_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 | ||
b6b38f70 | 674 | cFYI(1, "Negotiating LANMAN setting up strings"); |
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) { |
7c7b25bc | 679 | char ntlm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e SF |
680 | |
681 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
682 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
7c7b25bc | 683 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e | 684 | pSMB->req_no_secext.CaseSensitivePasswordLength = |
7c7b25bc | 685 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
50c2f753 | 686 | |
3979877e SF |
687 | /* calculate session key */ |
688 | SMBNTencrypt(ses->password, ses->server->cryptKey, | |
689 | ntlm_session_key); | |
690 | ||
790fe579 | 691 | if (first_time) /* should this be moved into common code |
3979877e | 692 | with similar ntlmv2 path? */ |
b609f06a | 693 | cifs_calculate_mac_key(&ses->server->mac_signing_key, |
3979877e SF |
694 | ntlm_session_key, ses->password); |
695 | /* copy session key */ | |
696 | ||
790fe579 | 697 | memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); |
7c7b25bc | 698 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
790fe579 | 699 | memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); |
7c7b25bc | 700 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
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) { | |
790fe579 | 711 | char *v2_sess_key = |
6d027cfd | 712 | kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL); |
f64b23ae SF |
713 | |
714 | /* BB FIXME change all users of v2_sess_key to | |
715 | struct ntlmv2_resp */ | |
7c7b25bc | 716 | |
790fe579 | 717 | if (v2_sess_key == NULL) { |
2442421b SF |
718 | rc = -ENOMEM; |
719 | goto ssetup_exit; | |
7c7b25bc SF |
720 | } |
721 | ||
722 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
723 | ||
724 | /* LM2 password would be here if we supported it */ | |
725 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
726 | /* cpu_to_le16(LM2_SESS_KEY_SIZE); */ | |
727 | ||
728 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
f64b23ae | 729 | cpu_to_le16(sizeof(struct ntlmv2_resp)); |
7c7b25bc SF |
730 | |
731 | /* calculate session key */ | |
1717ffc5 | 732 | setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp); |
790fe579 SF |
733 | if (first_time) /* should this be moved into common code |
734 | with similar ntlmv2 path? */ | |
7c7b25bc SF |
735 | /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key, |
736 | response BB FIXME, v2_sess_key); */ | |
737 | ||
738 | /* copy session key */ | |
739 | ||
740 | /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE); | |
741 | bcc_ptr += LM2_SESS_KEY_SIZE; */ | |
3870253e SF |
742 | memcpy(bcc_ptr, (char *)v2_sess_key, |
743 | sizeof(struct ntlmv2_resp)); | |
f64b23ae SF |
744 | bcc_ptr += sizeof(struct ntlmv2_resp); |
745 | kfree(v2_sess_key); | |
790fe579 SF |
746 | if (ses->capabilities & CAP_UNICODE) { |
747 | if (iov[0].iov_len % 2) { | |
0223cf0b | 748 | *bcc_ptr = 0; |
26f57364 SF |
749 | bcc_ptr++; |
750 | } | |
3979877e | 751 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 752 | } else |
3979877e | 753 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
26efa0ba | 754 | } else if (type == Kerberos) { |
2442421b SF |
755 | #ifdef CONFIG_CIFS_UPCALL |
756 | struct cifs_spnego_msg *msg; | |
757 | spnego_key = cifs_get_spnego_key(ses); | |
758 | if (IS_ERR(spnego_key)) { | |
759 | rc = PTR_ERR(spnego_key); | |
760 | spnego_key = NULL; | |
761 | goto ssetup_exit; | |
762 | } | |
763 | ||
764 | msg = spnego_key->payload.data; | |
6ce5eecb SF |
765 | /* check version field to make sure that cifs.upcall is |
766 | sending us a response in an expected form */ | |
767 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
b6b38f70 | 768 | cERROR(1, "incorrect version of cifs.upcall (expected" |
6ce5eecb | 769 | " %d but got %d)", |
b6b38f70 | 770 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); |
6ce5eecb SF |
771 | rc = -EKEYREJECTED; |
772 | goto ssetup_exit; | |
773 | } | |
2442421b SF |
774 | /* bail out if key is too long */ |
775 | if (msg->sesskey_len > | |
776 | sizeof(ses->server->mac_signing_key.data.krb5)) { | |
b6b38f70 JP |
777 | cERROR(1, "Kerberos signing key too long (%u bytes)", |
778 | msg->sesskey_len); | |
2442421b SF |
779 | rc = -EOVERFLOW; |
780 | goto ssetup_exit; | |
781 | } | |
1a67570c JL |
782 | if (first_time) { |
783 | ses->server->mac_signing_key.len = msg->sesskey_len; | |
784 | memcpy(ses->server->mac_signing_key.data.krb5, | |
785 | msg->data, msg->sesskey_len); | |
786 | } | |
3979877e SF |
787 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
788 | capabilities |= CAP_EXTENDED_SECURITY; | |
789 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
2442421b SF |
790 | iov[1].iov_base = msg->data + msg->sesskey_len; |
791 | iov[1].iov_len = msg->secblob_len; | |
792 | pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len); | |
793 | ||
794 | if (ses->capabilities & CAP_UNICODE) { | |
795 | /* unicode strings must be word aligned */ | |
28c5a02a | 796 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { |
2442421b SF |
797 | *bcc_ptr = 0; |
798 | bcc_ptr++; | |
799 | } | |
800 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
801 | unicode_domain_string(&bcc_ptr, ses, nls_cp); | |
802 | } else | |
803 | /* BB: is this right? */ | |
804 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
805 | #else /* ! CONFIG_CIFS_UPCALL */ | |
b6b38f70 | 806 | cERROR(1, "Kerberos negotiated but upcall support disabled!"); |
2442421b SF |
807 | rc = -ENOSYS; |
808 | goto ssetup_exit; | |
809 | #endif /* CONFIG_CIFS_UPCALL */ | |
810 | } else { | |
0b3cc858 | 811 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
f46c7234 | 812 | if (type == RawNTLMSSP) { |
0b3cc858 | 813 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { |
b6b38f70 | 814 | cERROR(1, "NTLMSSP requires Unicode support"); |
0b3cc858 SF |
815 | rc = -ENOSYS; |
816 | goto ssetup_exit; | |
817 | } | |
818 | ||
b6b38f70 | 819 | cFYI(1, "ntlmssp session setup phase %d", phase); |
0b3cc858 SF |
820 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
821 | capabilities |= CAP_EXTENDED_SECURITY; | |
822 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
823 | if (phase == NtLmNegotiate) { | |
824 | setup_ntlmssp_neg_req(pSMB, ses); | |
825 | iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
826 | } else if (phase == NtLmAuthenticate) { | |
827 | int blob_len; | |
828 | blob_len = setup_ntlmssp_auth_req(pSMB, ses, | |
829 | nls_cp, | |
830 | first_time); | |
831 | iov[1].iov_len = blob_len; | |
844823cb SF |
832 | /* Make sure that we tell the server that we |
833 | are using the uid that it just gave us back | |
834 | on the response (challenge) */ | |
835 | smb_buf->Uid = ses->Suid; | |
0b3cc858 | 836 | } else { |
b6b38f70 | 837 | cERROR(1, "invalid phase %d", phase); |
0b3cc858 SF |
838 | rc = -ENOSYS; |
839 | goto ssetup_exit; | |
840 | } | |
841 | iov[1].iov_base = &pSMB->req.SecurityBlob[0]; | |
842 | /* unicode strings must be word aligned */ | |
843 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { | |
844 | *bcc_ptr = 0; | |
845 | bcc_ptr++; | |
846 | } | |
847 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
848 | } else { | |
b6b38f70 | 849 | cERROR(1, "secType %d not supported!", type); |
0b3cc858 SF |
850 | rc = -ENOSYS; |
851 | goto ssetup_exit; | |
852 | } | |
853 | #else | |
b6b38f70 | 854 | cERROR(1, "secType %d not supported!", type); |
2442421b SF |
855 | rc = -ENOSYS; |
856 | goto ssetup_exit; | |
0b3cc858 | 857 | #endif |
3979877e SF |
858 | } |
859 | ||
2442421b SF |
860 | iov[2].iov_base = str_area; |
861 | iov[2].iov_len = (long) bcc_ptr - (long) str_area; | |
862 | ||
863 | count = iov[1].iov_len + iov[2].iov_len; | |
3979877e SF |
864 | smb_buf->smb_buf_length += count; |
865 | ||
3979877e SF |
866 | BCC_LE(smb_buf) = cpu_to_le16(count); |
867 | ||
2442421b | 868 | rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type, |
133672ef | 869 | CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR); |
3979877e SF |
870 | /* SMB request buf freed in SendReceive2 */ |
871 | ||
b6b38f70 | 872 | cFYI(1, "ssetup rc from sendrecv2 is %d", rc); |
3979877e SF |
873 | |
874 | pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; | |
875 | smb_buf = (struct smb_hdr *)iov[0].iov_base; | |
876 | ||
0b3cc858 SF |
877 | if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError == |
878 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) { | |
879 | if (phase != NtLmNegotiate) { | |
b6b38f70 | 880 | cERROR(1, "Unexpected more processing error"); |
0b3cc858 SF |
881 | goto ssetup_exit; |
882 | } | |
883 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
884 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
885 | rc = 0; /* MORE_PROC rc is not an error here, but expected */ | |
886 | } | |
887 | if (rc) | |
888 | goto ssetup_exit; | |
889 | ||
790fe579 | 890 | if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) { |
3979877e | 891 | rc = -EIO; |
b6b38f70 | 892 | cERROR(1, "bad word count %d", smb_buf->WordCount); |
3979877e SF |
893 | goto ssetup_exit; |
894 | } | |
895 | action = le16_to_cpu(pSMB->resp.Action); | |
896 | if (action & GUEST_LOGIN) | |
b6b38f70 | 897 | cFYI(1, "Guest login"); /* BB mark SesInfo struct? */ |
3979877e | 898 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
b6b38f70 | 899 | cFYI(1, "UID = %d ", ses->Suid); |
3979877e SF |
900 | /* response can have either 3 or 4 word count - Samba sends 3 */ |
901 | /* and lanman response is 3 */ | |
902 | bytes_remaining = BCC(smb_buf); | |
903 | bcc_ptr = pByteArea(smb_buf); | |
904 | ||
790fe579 | 905 | if (smb_buf->WordCount == 4) { |
3979877e SF |
906 | __u16 blob_len; |
907 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
790fe579 | 908 | if (blob_len > bytes_remaining) { |
b6b38f70 | 909 | cERROR(1, "bad security blob length %d", blob_len); |
3979877e SF |
910 | rc = -EINVAL; |
911 | goto ssetup_exit; | |
912 | } | |
0b3cc858 SF |
913 | if (phase == NtLmChallenge) { |
914 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); | |
915 | /* now goto beginning for ntlmssp authenticate phase */ | |
916 | if (rc) | |
917 | goto ssetup_exit; | |
918 | } | |
919 | bcc_ptr += blob_len; | |
3979877e | 920 | bytes_remaining -= blob_len; |
790fe579 | 921 | } |
3979877e SF |
922 | |
923 | /* BB check if Unicode and decode strings */ | |
27b87fe5 JL |
924 | if (smb_buf->Flags2 & SMBFLG2_UNICODE) { |
925 | /* unicode string area must be word-aligned */ | |
926 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
927 | ++bcc_ptr; | |
928 | --bytes_remaining; | |
929 | } | |
59140797 | 930 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp); |
27b87fe5 | 931 | } else { |
63135e08 SF |
932 | rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining, |
933 | ses, nls_cp); | |
27b87fe5 | 934 | } |
50c2f753 | 935 | |
3979877e | 936 | ssetup_exit: |
dfd15c46 JL |
937 | if (spnego_key) { |
938 | key_revoke(spnego_key); | |
2442421b | 939 | key_put(spnego_key); |
dfd15c46 | 940 | } |
750d1151 | 941 | kfree(str_area); |
790fe579 | 942 | if (resp_buf_type == CIFS_SMALL_BUFFER) { |
b6b38f70 | 943 | cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base); |
3979877e | 944 | cifs_small_buf_release(iov[0].iov_base); |
790fe579 | 945 | } else if (resp_buf_type == CIFS_LARGE_BUFFER) |
3979877e SF |
946 | cifs_buf_release(iov[0].iov_base); |
947 | ||
0b3cc858 SF |
948 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
949 | if ((phase == NtLmChallenge) && (rc == 0)) | |
950 | goto ssetup_ntlmssp_authenticate; | |
951 | ||
3979877e SF |
952 | return rc; |
953 | } |