Commit | Line | Data |
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3979877e SF |
1 | /* |
2 | * fs/cifs/sess.c | |
3 | * | |
4 | * SMB/CIFS session setup handling routines | |
5 | * | |
d185cda7 | 6 | * Copyright (c) International Business Machines Corp., 2006, 2009 |
3979877e SF |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include "cifspdu.h" | |
25 | #include "cifsglob.h" | |
26 | #include "cifsproto.h" | |
27 | #include "cifs_unicode.h" | |
28 | #include "cifs_debug.h" | |
29 | #include "ntlmssp.h" | |
30 | #include "nterr.h" | |
9c53588e | 31 | #include <linux/utsname.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
2442421b | 33 | #include "cifs_spnego.h" |
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 | */ | |
eca6acf9 SF |
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 | ||
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) { | |
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: | |
3f9bcca7 | 112 | spin_unlock(&cifs_tcp_ses_lock); |
eca6acf9 | 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; | |
301a6a31 | 226 | } else { |
3979877e | 227 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName, |
301a6a31 | 228 | MAX_USERNAME_SIZE, nls_cp); |
3979877e SF |
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 */ | |
301a6a31 SF |
249 | } else { |
250 | strncpy(bcc_ptr, ses->userName, MAX_USERNAME_SIZE); | |
790fe579 | 251 | } |
301a6a31 | 252 | bcc_ptr += strnlen(ses->userName, MAX_USERNAME_SIZE); |
3979877e | 253 | *bcc_ptr = 0; |
790fe579 | 254 | bcc_ptr++; /* account for null termination */ |
3979877e | 255 | |
790fe579 SF |
256 | /* copy domain */ |
257 | ||
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 JL |
279 | static void |
280 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses, | |
281 | const struct nls_table *nls_cp) | |
3979877e | 282 | { |
59140797 | 283 | int len; |
790fe579 | 284 | char *data = *pbcc_area; |
3979877e | 285 | |
b6b38f70 | 286 | cFYI(1, "bleft %d", bleft); |
3979877e | 287 | |
27b87fe5 JL |
288 | /* |
289 | * Windows servers do not always double null terminate their final | |
290 | * Unicode string. Check to see if there are an uneven number of bytes | |
291 | * left. If so, then add an extra NULL pad byte to the end of the | |
292 | * response. | |
293 | * | |
294 | * See section 2.7.2 in "Implementing CIFS" for details | |
295 | */ | |
296 | if (bleft % 2) { | |
297 | data[bleft] = 0; | |
298 | ++bleft; | |
299 | } | |
50c2f753 | 300 | |
26f57364 | 301 | kfree(ses->serverOS); |
d185cda7 | 302 | ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
b6b38f70 | 303 | cFYI(1, "serverOS=%s", ses->serverOS); |
59140797 JL |
304 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
305 | data += len; | |
306 | bleft -= len; | |
307 | if (bleft <= 0) | |
308 | return; | |
3979877e | 309 | |
26f57364 | 310 | kfree(ses->serverNOS); |
d185cda7 | 311 | ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
b6b38f70 | 312 | cFYI(1, "serverNOS=%s", ses->serverNOS); |
59140797 JL |
313 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
314 | data += len; | |
315 | bleft -= len; | |
316 | if (bleft <= 0) | |
317 | return; | |
790fe579 | 318 | |
26f57364 | 319 | kfree(ses->serverDomain); |
d185cda7 | 320 | ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp); |
b6b38f70 | 321 | cFYI(1, "serverDomain=%s", ses->serverDomain); |
790fe579 | 322 | |
59140797 | 323 | return; |
3979877e SF |
324 | } |
325 | ||
790fe579 SF |
326 | static int decode_ascii_ssetup(char **pbcc_area, int bleft, |
327 | struct cifsSesInfo *ses, | |
328 | const struct nls_table *nls_cp) | |
3979877e SF |
329 | { |
330 | int rc = 0; | |
331 | int len; | |
790fe579 | 332 | char *bcc_ptr = *pbcc_area; |
3979877e | 333 | |
b6b38f70 | 334 | cFYI(1, "decode sessetup ascii. bleft %d", bleft); |
50c2f753 | 335 | |
3979877e | 336 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 337 | if (len >= bleft) |
3979877e | 338 | return rc; |
50c2f753 | 339 | |
26f57364 | 340 | kfree(ses->serverOS); |
3979877e SF |
341 | |
342 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 343 | if (ses->serverOS) |
3979877e | 344 | strncpy(ses->serverOS, bcc_ptr, len); |
790fe579 | 345 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) { |
b6b38f70 | 346 | cFYI(1, "OS/2 server"); |
9ac00b7d SF |
347 | ses->flags |= CIFS_SES_OS2; |
348 | } | |
3979877e SF |
349 | |
350 | bcc_ptr += len + 1; | |
351 | bleft -= len + 1; | |
352 | ||
353 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 354 | if (len >= bleft) |
3979877e SF |
355 | return rc; |
356 | ||
26f57364 | 357 | kfree(ses->serverNOS); |
3979877e SF |
358 | |
359 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 360 | if (ses->serverNOS) |
3979877e SF |
361 | strncpy(ses->serverNOS, bcc_ptr, len); |
362 | ||
363 | bcc_ptr += len + 1; | |
364 | bleft -= len + 1; | |
365 | ||
790fe579 SF |
366 | len = strnlen(bcc_ptr, bleft); |
367 | if (len > bleft) | |
368 | return rc; | |
3979877e | 369 | |
9ac00b7d SF |
370 | /* No domain field in LANMAN case. Domain is |
371 | returned by old servers in the SMB negprot response */ | |
372 | /* BB For newer servers which do not support Unicode, | |
373 | but thus do return domain here we could add parsing | |
374 | for it later, but it is not very important */ | |
b6b38f70 | 375 | cFYI(1, "ascii: bytes left %d", bleft); |
3979877e SF |
376 | |
377 | return rc; | |
378 | } | |
379 | ||
0b3cc858 SF |
380 | static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
381 | struct cifsSesInfo *ses) | |
382 | { | |
2b149f11 SP |
383 | unsigned int tioffset; /* challenge message target info area */ |
384 | unsigned int tilen; /* challenge message target info area length */ | |
385 | ||
0b3cc858 SF |
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 | ||
5d0d2882 | 402 | memcpy(ses->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
0b3cc858 SF |
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 */ | |
d2b91521 | 407 | ses->ntlmssp.server_flags = le32_to_cpu(pblob->NegotiateFlags); |
2b149f11 SP |
408 | tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset); |
409 | tilen = cpu_to_le16(pblob->TargetInfoArray.Length); | |
410 | ses->tilen = tilen; | |
411 | if (ses->tilen) { | |
412 | ses->tiblob = kmalloc(tilen, GFP_KERNEL); | |
413 | if (!ses->tiblob) { | |
414 | cERROR(1, "Challenge target info allocation failure"); | |
415 | ses->tilen = 0; | |
416 | return -ENOMEM; | |
417 | } | |
418 | memcpy(ses->tiblob, bcc_ptr + tioffset, ses->tilen); | |
419 | } | |
420 | ||
0b3cc858 SF |
421 | return 0; |
422 | } | |
423 | ||
424 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
425 | /* BB Move to ntlmssp.c eventually */ | |
426 | ||
427 | /* We do not malloc the blob, it is passed in pbuffer, because | |
428 | it is fixed size, and small, making this approach cleaner */ | |
429 | static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, | |
430 | struct cifsSesInfo *ses) | |
431 | { | |
432 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; | |
433 | __u32 flags; | |
434 | ||
435 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
436 | sec_blob->MessageType = NtLmNegotiate; | |
437 | ||
438 | /* BB is NTLMV2 session security format easier to use here? */ | |
439 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
440 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
2b149f11 | 441 | NTLMSSP_NEGOTIATE_NTLM; |
0b3cc858 | 442 | if (ses->server->secMode & |
d2b91521 | 443 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { |
745e507a | 444 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
d2b91521 SP |
445 | if (!ses->server->session_estab) |
446 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH | | |
447 | NTLMSSP_NEGOTIATE_EXTENDED_SEC; | |
448 | } | |
0b3cc858 SF |
449 | |
450 | sec_blob->NegotiateFlags |= cpu_to_le32(flags); | |
451 | ||
452 | sec_blob->WorkstationName.BufferOffset = 0; | |
453 | sec_blob->WorkstationName.Length = 0; | |
454 | sec_blob->WorkstationName.MaximumLength = 0; | |
455 | ||
456 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
457 | sec_blob->DomainName.BufferOffset = 0; | |
458 | sec_blob->DomainName.Length = 0; | |
459 | sec_blob->DomainName.MaximumLength = 0; | |
460 | } | |
461 | ||
462 | /* We do not malloc the blob, it is passed in pbuffer, because its | |
463 | maximum possible size is fixed and small, making this approach cleaner. | |
464 | This function returns the length of the data in the blob */ | |
465 | static int build_ntlmssp_auth_blob(unsigned char *pbuffer, | |
89f150f4 | 466 | u16 *buflen, |
0b3cc858 | 467 | struct cifsSesInfo *ses, |
2b149f11 | 468 | const struct nls_table *nls_cp) |
0b3cc858 | 469 | { |
2b149f11 | 470 | int rc; |
0b3cc858 SF |
471 | AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer; |
472 | __u32 flags; | |
473 | unsigned char *tmp; | |
0b3cc858 SF |
474 | |
475 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); | |
476 | sec_blob->MessageType = NtLmAuthenticate; | |
477 | ||
478 | flags = NTLMSSP_NEGOTIATE_56 | | |
479 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
480 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
2b149f11 | 481 | NTLMSSP_NEGOTIATE_NTLM; |
0b3cc858 SF |
482 | if (ses->server->secMode & |
483 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
484 | flags |= NTLMSSP_NEGOTIATE_SIGN; | |
485 | if (ses->server->secMode & SECMODE_SIGN_REQUIRED) | |
486 | flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; | |
487 | ||
488 | tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE); | |
489 | sec_blob->NegotiateFlags |= cpu_to_le32(flags); | |
490 | ||
491 | sec_blob->LmChallengeResponse.BufferOffset = | |
492 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
493 | sec_blob->LmChallengeResponse.Length = 0; | |
494 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
495 | ||
c8e56f1f | 496 | sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer); |
21e73393 | 497 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
2b149f11 SP |
498 | if (rc) { |
499 | cERROR(1, "Error %d during NTLMSSP authentication", rc); | |
500 | goto setup_ntlmv2_ret; | |
501 | } | |
21e73393 SP |
502 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
503 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
504 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
c8e56f1f | 505 | |
21e73393 SP |
506 | sec_blob->NtChallengeResponse.Length = |
507 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
2b149f11 | 508 | sec_blob->NtChallengeResponse.MaximumLength = |
21e73393 | 509 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); |
0b3cc858 SF |
510 | |
511 | if (ses->domainName == NULL) { | |
512 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
513 | sec_blob->DomainName.Length = 0; | |
514 | sec_blob->DomainName.MaximumLength = 0; | |
515 | tmp += 2; | |
516 | } else { | |
517 | int len; | |
518 | len = cifs_strtoUCS((__le16 *)tmp, ses->domainName, | |
519 | MAX_USERNAME_SIZE, nls_cp); | |
520 | len *= 2; /* unicode is 2 bytes each */ | |
0b3cc858 SF |
521 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); |
522 | sec_blob->DomainName.Length = cpu_to_le16(len); | |
523 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
524 | tmp += len; | |
525 | } | |
526 | ||
527 | if (ses->userName == NULL) { | |
528 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
529 | sec_blob->UserName.Length = 0; | |
530 | sec_blob->UserName.MaximumLength = 0; | |
531 | tmp += 2; | |
532 | } else { | |
533 | int len; | |
534 | len = cifs_strtoUCS((__le16 *)tmp, ses->userName, | |
535 | MAX_USERNAME_SIZE, nls_cp); | |
536 | len *= 2; /* unicode is 2 bytes each */ | |
0b3cc858 SF |
537 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer); |
538 | sec_blob->UserName.Length = cpu_to_le16(len); | |
539 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
540 | tmp += len; | |
541 | } | |
542 | ||
543 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
544 | sec_blob->WorkstationName.Length = 0; | |
545 | sec_blob->WorkstationName.MaximumLength = 0; | |
546 | tmp += 2; | |
547 | ||
d2b91521 SP |
548 | if ((ses->ntlmssp.server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) && |
549 | !calc_seckey(ses)) { | |
550 | memcpy(tmp, ses->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE); | |
551 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
552 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); | |
553 | sec_blob->SessionKey.MaximumLength = | |
554 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
555 | tmp += CIFS_CPHTXT_SIZE; | |
556 | } else { | |
557 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); | |
558 | sec_blob->SessionKey.Length = 0; | |
559 | sec_blob->SessionKey.MaximumLength = 0; | |
560 | } | |
2b149f11 SP |
561 | |
562 | setup_ntlmv2_ret: | |
89f150f4 SP |
563 | *buflen = tmp - pbuffer; |
564 | return rc; | |
0b3cc858 SF |
565 | } |
566 | ||
567 | ||
568 | static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB, | |
569 | struct cifsSesInfo *ses) | |
570 | { | |
571 | build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses); | |
572 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
573 | ||
574 | return; | |
575 | } | |
0b3cc858 SF |
576 | #endif |
577 | ||
790fe579 | 578 | int |
ebe6aa5a JL |
579 | CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, |
580 | const struct nls_table *nls_cp) | |
3979877e SF |
581 | { |
582 | int rc = 0; | |
583 | int wct; | |
3979877e SF |
584 | struct smb_hdr *smb_buf; |
585 | char *bcc_ptr; | |
750d1151 | 586 | char *str_area; |
3979877e SF |
587 | SESSION_SETUP_ANDX *pSMB; |
588 | __u32 capabilities; | |
589 | int count; | |
2442421b SF |
590 | int resp_buf_type; |
591 | struct kvec iov[3]; | |
3979877e SF |
592 | enum securityEnum type; |
593 | __u16 action; | |
594 | int bytes_remaining; | |
2442421b | 595 | struct key *spnego_key = NULL; |
0b3cc858 | 596 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
89f150f4 | 597 | u16 blob_len; |
2b149f11 | 598 | char *ntlmsspblob = NULL; |
254e55ed | 599 | |
790fe579 | 600 | if (ses == NULL) |
3979877e SF |
601 | return -EINVAL; |
602 | ||
603 | type = ses->server->secType; | |
f40c5628 | 604 | |
b6b38f70 | 605 | cFYI(1, "sess setup type %d", type); |
0b3cc858 SF |
606 | ssetup_ntlmssp_authenticate: |
607 | if (phase == NtLmChallenge) | |
608 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
609 | ||
790fe579 | 610 | if (type == LANMAN) { |
3979877e SF |
611 | #ifndef CONFIG_CIFS_WEAK_PW_HASH |
612 | /* LANMAN and plaintext are less secure and off by default. | |
613 | So we make this explicitly be turned on in kconfig (in the | |
614 | build) and turned on at runtime (changed from the default) | |
615 | in proc/fs/cifs or via mount parm. Unfortunately this is | |
616 | needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
617 | return -EOPNOTSUPP; | |
618 | #endif | |
619 | wct = 10; /* lanman 2 style sessionsetup */ | |
790fe579 | 620 | } else if ((type == NTLM) || (type == NTLMv2)) { |
9312f675 | 621 | /* For NTLMv2 failures eventually may need to retry NTLM */ |
3979877e | 622 | wct = 13; /* old style NTLM sessionsetup */ |
790fe579 | 623 | } else /* same size: negotiate or auth, NTLMSSP or extended security */ |
3979877e SF |
624 | wct = 12; |
625 | ||
626 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
627 | (void **)&smb_buf); | |
790fe579 | 628 | if (rc) |
3979877e SF |
629 | return rc; |
630 | ||
631 | pSMB = (SESSION_SETUP_ANDX *)smb_buf; | |
632 | ||
633 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
750d1151 | 634 | |
2442421b SF |
635 | /* we will send the SMB in three pieces: |
636 | a fixed length beginning part, an optional | |
637 | SPNEGO blob (which can be zero length), and a | |
638 | last part which will include the strings | |
639 | and rest of bcc area. This allows us to avoid | |
640 | a large buffer 17K allocation */ | |
790fe579 SF |
641 | iov[0].iov_base = (char *)pSMB; |
642 | iov[0].iov_len = smb_buf->smb_buf_length + 4; | |
750d1151 | 643 | |
2442421b SF |
644 | /* setting this here allows the code at the end of the function |
645 | to free the request buffer if there's an error */ | |
646 | resp_buf_type = CIFS_SMALL_BUFFER; | |
647 | ||
750d1151 SF |
648 | /* 2000 big enough to fit max user, domain, NOS name etc. */ |
649 | str_area = kmalloc(2000, GFP_KERNEL); | |
5e6e6232 | 650 | if (str_area == NULL) { |
2442421b SF |
651 | rc = -ENOMEM; |
652 | goto ssetup_exit; | |
5e6e6232 | 653 | } |
750d1151 | 654 | bcc_ptr = str_area; |
3979877e | 655 | |
9ac00b7d SF |
656 | ses->flags &= ~CIFS_SES_LANMAN; |
657 | ||
2442421b SF |
658 | iov[1].iov_base = NULL; |
659 | iov[1].iov_len = 0; | |
660 | ||
790fe579 | 661 | if (type == LANMAN) { |
3979877e | 662 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
7c7b25bc | 663 | char lnm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e | 664 | |
c76da9da SF |
665 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; |
666 | ||
3979877e SF |
667 | /* no capabilities flags in old lanman negotiation */ |
668 | ||
790fe579 | 669 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e SF |
670 | /* BB calculate hash with password */ |
671 | /* and copy into bcc */ | |
672 | ||
5d0d2882 | 673 | calc_lanman_hash(ses->password, ses->cryptKey, |
4e53a3fb JL |
674 | ses->server->secMode & SECMODE_PW_ENCRYPT ? |
675 | true : false, lnm_session_key); | |
676 | ||
790fe579 | 677 | ses->flags |= CIFS_SES_LANMAN; |
7c7b25bc SF |
678 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); |
679 | bcc_ptr += CIFS_SESS_KEY_SIZE; | |
3979877e SF |
680 | |
681 | /* can not sign if LANMAN negotiated so no need | |
682 | to calculate signing key? but what if server | |
683 | changed to do higher than lanman dialect and | |
684 | we reconnected would we ever calc signing_key? */ | |
685 | ||
b6b38f70 | 686 | cFYI(1, "Negotiating LANMAN setting up strings"); |
3979877e SF |
687 | /* Unicode not allowed for LANMAN dialects */ |
688 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
790fe579 | 689 | #endif |
3979877e | 690 | } else if (type == NTLM) { |
3979877e SF |
691 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); |
692 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
21e73393 | 693 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
3979877e | 694 | pSMB->req_no_secext.CaseSensitivePasswordLength = |
21e73393 SP |
695 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
696 | ||
697 | /* calculate ntlm response and session key */ | |
698 | rc = setup_ntlm_response(ses); | |
699 | if (rc) { | |
700 | cERROR(1, "Error %d during NTLM authentication", rc); | |
701 | goto ssetup_exit; | |
702 | } | |
50c2f753 | 703 | |
21e73393 SP |
704 | /* copy ntlm response */ |
705 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
706 | CIFS_AUTH_RESP_SIZE); | |
707 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
708 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
709 | CIFS_AUTH_RESP_SIZE); | |
710 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
3979877e | 711 | |
790fe579 | 712 | if (ses->capabilities & CAP_UNICODE) { |
0223cf0b SF |
713 | /* unicode strings must be word aligned */ |
714 | if (iov[0].iov_len % 2) { | |
715 | *bcc_ptr = 0; | |
790fe579 SF |
716 | bcc_ptr++; |
717 | } | |
7c7b25bc | 718 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 719 | } else |
7c7b25bc SF |
720 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
721 | } else if (type == NTLMv2) { | |
7c7b25bc SF |
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; | |
7c7b25bc | 726 | |
21e73393 SP |
727 | /* calculate nlmv2 response and session key */ |
728 | rc = setup_ntlmv2_rsp(ses, nls_cp); | |
2b149f11 SP |
729 | if (rc) { |
730 | cERROR(1, "Error %d during NTLMv2 authentication", rc); | |
2b149f11 SP |
731 | goto ssetup_exit; |
732 | } | |
21e73393 SP |
733 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
734 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
735 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
736 | ||
c9928f70 SP |
737 | /* set case sensitive password length after tilen may get |
738 | * assigned, tilen is 0 otherwise. | |
739 | */ | |
740 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
21e73393 | 741 | cpu_to_le16(ses->auth_key.len); |
c9928f70 | 742 | |
790fe579 SF |
743 | if (ses->capabilities & CAP_UNICODE) { |
744 | if (iov[0].iov_len % 2) { | |
0223cf0b | 745 | *bcc_ptr = 0; |
26f57364 SF |
746 | bcc_ptr++; |
747 | } | |
3979877e | 748 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 749 | } else |
3979877e | 750 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
26efa0ba | 751 | } else if (type == Kerberos) { |
2442421b SF |
752 | #ifdef CONFIG_CIFS_UPCALL |
753 | struct cifs_spnego_msg *msg; | |
21e73393 | 754 | |
2442421b SF |
755 | spnego_key = cifs_get_spnego_key(ses); |
756 | if (IS_ERR(spnego_key)) { | |
757 | rc = PTR_ERR(spnego_key); | |
758 | spnego_key = NULL; | |
759 | goto ssetup_exit; | |
760 | } | |
761 | ||
762 | msg = spnego_key->payload.data; | |
6ce5eecb SF |
763 | /* check version field to make sure that cifs.upcall is |
764 | sending us a response in an expected form */ | |
765 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
b6b38f70 | 766 | cERROR(1, "incorrect version of cifs.upcall (expected" |
6ce5eecb | 767 | " %d but got %d)", |
b6b38f70 | 768 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); |
6ce5eecb SF |
769 | rc = -EKEYREJECTED; |
770 | goto ssetup_exit; | |
771 | } | |
21e73393 SP |
772 | |
773 | ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL); | |
774 | if (!ses->auth_key.response) { | |
775 | cERROR(1, "Kerberos can't allocate (%u bytes) memory", | |
776 | msg->sesskey_len); | |
777 | rc = -ENOMEM; | |
2442421b SF |
778 | goto ssetup_exit; |
779 | } | |
21e73393 | 780 | memcpy(ses->auth_key.response, msg->data, msg->sesskey_len); |
5d0d2882 | 781 | ses->auth_key.len = msg->sesskey_len; |
21e73393 | 782 | |
3979877e SF |
783 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
784 | capabilities |= CAP_EXTENDED_SECURITY; | |
785 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
2442421b SF |
786 | iov[1].iov_base = msg->data + msg->sesskey_len; |
787 | iov[1].iov_len = msg->secblob_len; | |
788 | pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len); | |
789 | ||
790 | if (ses->capabilities & CAP_UNICODE) { | |
791 | /* unicode strings must be word aligned */ | |
28c5a02a | 792 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { |
2442421b SF |
793 | *bcc_ptr = 0; |
794 | bcc_ptr++; | |
795 | } | |
796 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
797 | unicode_domain_string(&bcc_ptr, ses, nls_cp); | |
798 | } else | |
799 | /* BB: is this right? */ | |
800 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
801 | #else /* ! CONFIG_CIFS_UPCALL */ | |
b6b38f70 | 802 | cERROR(1, "Kerberos negotiated but upcall support disabled!"); |
2442421b SF |
803 | rc = -ENOSYS; |
804 | goto ssetup_exit; | |
805 | #endif /* CONFIG_CIFS_UPCALL */ | |
806 | } else { | |
0b3cc858 | 807 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
f46c7234 | 808 | if (type == RawNTLMSSP) { |
0b3cc858 | 809 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { |
b6b38f70 | 810 | cERROR(1, "NTLMSSP requires Unicode support"); |
0b3cc858 SF |
811 | rc = -ENOSYS; |
812 | goto ssetup_exit; | |
813 | } | |
814 | ||
b6b38f70 | 815 | cFYI(1, "ntlmssp session setup phase %d", phase); |
0b3cc858 SF |
816 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
817 | capabilities |= CAP_EXTENDED_SECURITY; | |
818 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
819 | if (phase == NtLmNegotiate) { | |
820 | setup_ntlmssp_neg_req(pSMB, ses); | |
821 | iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
2b149f11 | 822 | iov[1].iov_base = &pSMB->req.SecurityBlob[0]; |
0b3cc858 | 823 | } else if (phase == NtLmAuthenticate) { |
2b149f11 SP |
824 | /* 5 is an empirical value, large enought to |
825 | * hold authenticate message, max 10 of | |
826 | * av paris, doamin,user,workstation mames, | |
827 | * flags etc.. | |
828 | */ | |
829 | ntlmsspblob = kmalloc( | |
830 | 5*sizeof(struct _AUTHENTICATE_MESSAGE), | |
831 | GFP_KERNEL); | |
832 | if (!ntlmsspblob) { | |
833 | cERROR(1, "Can't allocate NTLMSSP"); | |
834 | rc = -ENOMEM; | |
835 | goto ssetup_exit; | |
836 | } | |
837 | ||
89f150f4 SP |
838 | rc = build_ntlmssp_auth_blob(ntlmsspblob, |
839 | &blob_len, ses, nls_cp); | |
840 | if (rc) | |
841 | goto ssetup_exit; | |
0b3cc858 | 842 | iov[1].iov_len = blob_len; |
2b149f11 SP |
843 | iov[1].iov_base = ntlmsspblob; |
844 | pSMB->req.SecurityBlobLength = | |
845 | cpu_to_le16(blob_len); | |
844823cb SF |
846 | /* Make sure that we tell the server that we |
847 | are using the uid that it just gave us back | |
848 | on the response (challenge) */ | |
849 | smb_buf->Uid = ses->Suid; | |
0b3cc858 | 850 | } else { |
b6b38f70 | 851 | cERROR(1, "invalid phase %d", phase); |
0b3cc858 SF |
852 | rc = -ENOSYS; |
853 | goto ssetup_exit; | |
854 | } | |
0b3cc858 SF |
855 | /* unicode strings must be word aligned */ |
856 | if ((iov[0].iov_len + iov[1].iov_len) % 2) { | |
857 | *bcc_ptr = 0; | |
858 | bcc_ptr++; | |
859 | } | |
860 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
861 | } else { | |
b6b38f70 | 862 | cERROR(1, "secType %d not supported!", type); |
0b3cc858 SF |
863 | rc = -ENOSYS; |
864 | goto ssetup_exit; | |
865 | } | |
866 | #else | |
b6b38f70 | 867 | cERROR(1, "secType %d not supported!", type); |
2442421b SF |
868 | rc = -ENOSYS; |
869 | goto ssetup_exit; | |
0b3cc858 | 870 | #endif |
3979877e SF |
871 | } |
872 | ||
2442421b SF |
873 | iov[2].iov_base = str_area; |
874 | iov[2].iov_len = (long) bcc_ptr - (long) str_area; | |
875 | ||
876 | count = iov[1].iov_len + iov[2].iov_len; | |
3979877e SF |
877 | smb_buf->smb_buf_length += count; |
878 | ||
3979877e SF |
879 | BCC_LE(smb_buf) = cpu_to_le16(count); |
880 | ||
2442421b | 881 | rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type, |
133672ef | 882 | CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR); |
3979877e SF |
883 | /* SMB request buf freed in SendReceive2 */ |
884 | ||
3979877e SF |
885 | pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; |
886 | smb_buf = (struct smb_hdr *)iov[0].iov_base; | |
887 | ||
0b3cc858 SF |
888 | if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError == |
889 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) { | |
890 | if (phase != NtLmNegotiate) { | |
b6b38f70 | 891 | cERROR(1, "Unexpected more processing error"); |
0b3cc858 SF |
892 | goto ssetup_exit; |
893 | } | |
894 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
895 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
896 | rc = 0; /* MORE_PROC rc is not an error here, but expected */ | |
897 | } | |
898 | if (rc) | |
899 | goto ssetup_exit; | |
900 | ||
790fe579 | 901 | if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) { |
3979877e | 902 | rc = -EIO; |
b6b38f70 | 903 | cERROR(1, "bad word count %d", smb_buf->WordCount); |
3979877e SF |
904 | goto ssetup_exit; |
905 | } | |
906 | action = le16_to_cpu(pSMB->resp.Action); | |
907 | if (action & GUEST_LOGIN) | |
b6b38f70 | 908 | cFYI(1, "Guest login"); /* BB mark SesInfo struct? */ |
3979877e | 909 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
b6b38f70 | 910 | cFYI(1, "UID = %d ", ses->Suid); |
3979877e SF |
911 | /* response can have either 3 or 4 word count - Samba sends 3 */ |
912 | /* and lanman response is 3 */ | |
913 | bytes_remaining = BCC(smb_buf); | |
914 | bcc_ptr = pByteArea(smb_buf); | |
915 | ||
790fe579 | 916 | if (smb_buf->WordCount == 4) { |
3979877e | 917 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
790fe579 | 918 | if (blob_len > bytes_remaining) { |
b6b38f70 | 919 | cERROR(1, "bad security blob length %d", blob_len); |
3979877e SF |
920 | rc = -EINVAL; |
921 | goto ssetup_exit; | |
922 | } | |
0b3cc858 SF |
923 | if (phase == NtLmChallenge) { |
924 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); | |
925 | /* now goto beginning for ntlmssp authenticate phase */ | |
926 | if (rc) | |
927 | goto ssetup_exit; | |
928 | } | |
929 | bcc_ptr += blob_len; | |
3979877e | 930 | bytes_remaining -= blob_len; |
790fe579 | 931 | } |
3979877e SF |
932 | |
933 | /* BB check if Unicode and decode strings */ | |
27b87fe5 JL |
934 | if (smb_buf->Flags2 & SMBFLG2_UNICODE) { |
935 | /* unicode string area must be word-aligned */ | |
936 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
937 | ++bcc_ptr; | |
938 | --bytes_remaining; | |
939 | } | |
59140797 | 940 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp); |
27b87fe5 | 941 | } else { |
63135e08 SF |
942 | rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining, |
943 | ses, nls_cp); | |
27b87fe5 | 944 | } |
50c2f753 | 945 | |
3979877e | 946 | ssetup_exit: |
dfd15c46 JL |
947 | if (spnego_key) { |
948 | key_revoke(spnego_key); | |
2442421b | 949 | key_put(spnego_key); |
dfd15c46 | 950 | } |
750d1151 | 951 | kfree(str_area); |
2b149f11 SP |
952 | kfree(ntlmsspblob); |
953 | ntlmsspblob = NULL; | |
790fe579 | 954 | if (resp_buf_type == CIFS_SMALL_BUFFER) { |
b6b38f70 | 955 | cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base); |
3979877e | 956 | cifs_small_buf_release(iov[0].iov_base); |
790fe579 | 957 | } else if (resp_buf_type == CIFS_LARGE_BUFFER) |
3979877e SF |
958 | cifs_buf_release(iov[0].iov_base); |
959 | ||
0b3cc858 SF |
960 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
961 | if ((phase == NtLmChallenge) && (rc == 0)) | |
962 | goto ssetup_ntlmssp_authenticate; | |
963 | ||
3979877e SF |
964 | return rc; |
965 | } |