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3979877e SF |
1 | /* |
2 | * fs/cifs/sess.c | |
3 | * | |
4 | * SMB/CIFS session setup handling routines | |
5 | * | |
6 | * Copyright (c) International Business Machines Corp., 2006 | |
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> |
3979877e | 32 | |
3979877e SF |
33 | extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, |
34 | unsigned char *p24); | |
35 | ||
3979877e SF |
36 | static __u32 cifs_ssetup_hdr(struct cifsSesInfo *ses, SESSION_SETUP_ANDX *pSMB) |
37 | { | |
38 | __u32 capabilities = 0; | |
39 | ||
40 | /* init fields common to all four types of SessSetup */ | |
41 | /* note that header is initialized to zero in header_assemble */ | |
42 | pSMB->req.AndXCommand = 0xFF; | |
43 | pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf); | |
44 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); | |
45 | ||
46 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
47 | ||
48 | /* BB verify whether signing required on neg or just on auth frame | |
49 | (and NTLM case) */ | |
50 | ||
51 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
52 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
53 | ||
54 | if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
55 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; | |
56 | ||
57 | if (ses->capabilities & CAP_UNICODE) { | |
58 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
59 | capabilities |= CAP_UNICODE; | |
60 | } | |
61 | if (ses->capabilities & CAP_STATUS32) { | |
62 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
63 | capabilities |= CAP_STATUS32; | |
64 | } | |
65 | if (ses->capabilities & CAP_DFS) { | |
66 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
67 | capabilities |= CAP_DFS; | |
68 | } | |
69 | if (ses->capabilities & CAP_UNIX) { | |
70 | capabilities |= CAP_UNIX; | |
71 | } | |
72 | ||
73 | /* BB check whether to init vcnum BB */ | |
74 | return capabilities; | |
75 | } | |
76 | ||
7c7b25bc | 77 | static void unicode_ssetup_strings(char ** pbcc_area, struct cifsSesInfo *ses, |
3979877e SF |
78 | const struct nls_table * nls_cp) |
79 | { | |
80 | char * bcc_ptr = *pbcc_area; | |
81 | int bytes_ret = 0; | |
82 | ||
83 | /* BB FIXME add check that strings total less | |
84 | than 335 or will need to send them as arrays */ | |
85 | ||
0223cf0b SF |
86 | /* unicode strings, must be word aligned before the call */ |
87 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
88 | *bcc_ptr = 0; |
89 | bcc_ptr++; | |
0223cf0b | 90 | } */ |
3979877e SF |
91 | /* copy user */ |
92 | if(ses->userName == NULL) { | |
93 | /* BB what about null user mounts - check that we do this BB */ | |
94 | } else { /* 300 should be long enough for any conceivable user name */ | |
95 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName, | |
96 | 300, nls_cp); | |
97 | } | |
98 | bcc_ptr += 2 * bytes_ret; | |
99 | bcc_ptr += 2; /* account for null termination */ | |
100 | /* copy domain */ | |
101 | if(ses->domainName == NULL) | |
102 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, | |
103 | "CIFS_LINUX_DOM", 32, nls_cp); | |
104 | else | |
105 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->domainName, | |
106 | 256, nls_cp); | |
107 | bcc_ptr += 2 * bytes_ret; | |
108 | bcc_ptr += 2; /* account for null terminator */ | |
109 | ||
110 | /* Copy OS version */ | |
111 | bytes_ret = cifs_strtoUCS((__le16 *)bcc_ptr, "Linux version ", 32, | |
112 | nls_cp); | |
113 | bcc_ptr += 2 * bytes_ret; | |
96b644bd | 114 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, init_utsname()->release, |
3979877e SF |
115 | 32, nls_cp); |
116 | bcc_ptr += 2 * bytes_ret; | |
117 | bcc_ptr += 2; /* trailing null */ | |
118 | ||
119 | bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, | |
120 | 32, nls_cp); | |
121 | bcc_ptr += 2 * bytes_ret; | |
122 | bcc_ptr += 2; /* trailing null */ | |
123 | ||
124 | *pbcc_area = bcc_ptr; | |
125 | } | |
126 | ||
7c7b25bc | 127 | static void ascii_ssetup_strings(char ** pbcc_area, struct cifsSesInfo *ses, |
3979877e SF |
128 | const struct nls_table * nls_cp) |
129 | { | |
130 | char * bcc_ptr = *pbcc_area; | |
131 | ||
132 | /* copy user */ | |
133 | /* BB what about null user mounts - check that we do this BB */ | |
134 | /* copy user */ | |
135 | if(ses->userName == NULL) { | |
136 | /* BB what about null user mounts - check that we do this BB */ | |
137 | } else { /* 300 should be long enough for any conceivable user name */ | |
138 | strncpy(bcc_ptr, ses->userName, 300); | |
139 | } | |
140 | /* BB improve check for overflow */ | |
750d1151 | 141 | bcc_ptr += strnlen(ses->userName, 300); |
3979877e SF |
142 | *bcc_ptr = 0; |
143 | bcc_ptr++; /* account for null termination */ | |
144 | ||
145 | /* copy domain */ | |
146 | ||
147 | if(ses->domainName == NULL) { | |
148 | strcpy(bcc_ptr, "CIFS_LINUX_DOM"); | |
149 | bcc_ptr += 14; /* strlen(CIFS_LINUX_DOM) */ | |
150 | } else { | |
151 | strncpy(bcc_ptr, ses->domainName, 256); | |
152 | bcc_ptr += strnlen(ses->domainName, 256); | |
153 | } | |
154 | *bcc_ptr = 0; | |
155 | bcc_ptr++; | |
156 | ||
157 | /* BB check for overflow here */ | |
158 | ||
159 | strcpy(bcc_ptr, "Linux version "); | |
160 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
161 | strcpy(bcc_ptr, init_utsname()->release); |
162 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
163 | |
164 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
165 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
166 | ||
167 | *pbcc_area = bcc_ptr; | |
168 | } | |
169 | ||
7c7b25bc | 170 | static int decode_unicode_ssetup(char ** pbcc_area, int bleft, struct cifsSesInfo *ses, |
3979877e SF |
171 | const struct nls_table * nls_cp) |
172 | { | |
173 | int rc = 0; | |
174 | int words_left, len; | |
175 | char * data = *pbcc_area; | |
176 | ||
177 | ||
178 | ||
179 | cFYI(1,("bleft %d",bleft)); | |
180 | ||
181 | ||
182 | /* word align, if bytes remaining is not even */ | |
183 | if(bleft % 2) { | |
184 | bleft--; | |
185 | data++; | |
186 | } | |
187 | words_left = bleft / 2; | |
188 | ||
189 | /* save off server operating system */ | |
190 | len = UniStrnlen((wchar_t *) data, words_left); | |
191 | ||
192 | /* We look for obvious messed up bcc or strings in response so we do not go off | |
193 | the end since (at least) WIN2K and Windows XP have a major bug in not null | |
194 | terminating last Unicode string in response */ | |
195 | if(len >= words_left) | |
196 | return rc; | |
197 | ||
198 | if(ses->serverOS) | |
199 | kfree(ses->serverOS); | |
200 | /* UTF-8 string will not grow more than four times as big as UCS-16 */ | |
201 | ses->serverOS = kzalloc(4 * len, GFP_KERNEL); | |
202 | if(ses->serverOS != NULL) { | |
203 | cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, | |
204 | nls_cp); | |
205 | } | |
206 | data += 2 * (len + 1); | |
207 | words_left -= len + 1; | |
208 | ||
209 | /* save off server network operating system */ | |
210 | len = UniStrnlen((wchar_t *) data, words_left); | |
211 | ||
212 | if(len >= words_left) | |
213 | return rc; | |
214 | ||
215 | if(ses->serverNOS) | |
216 | kfree(ses->serverNOS); | |
217 | ses->serverNOS = kzalloc(4 * len, GFP_KERNEL); /* BB this is wrong length FIXME BB */ | |
218 | if(ses->serverNOS != NULL) { | |
219 | cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len, | |
220 | nls_cp); | |
221 | if(strncmp(ses->serverNOS, "NT LAN Manager 4",16) == 0) { | |
222 | cFYI(1,("NT4 server")); | |
223 | ses->flags |= CIFS_SES_NT4; | |
224 | } | |
225 | } | |
226 | data += 2 * (len + 1); | |
227 | words_left -= len + 1; | |
228 | ||
229 | /* save off server domain */ | |
230 | len = UniStrnlen((wchar_t *) data, words_left); | |
231 | ||
232 | if(len > words_left) | |
233 | return rc; | |
234 | ||
235 | if(ses->serverDomain) | |
236 | kfree(ses->serverDomain); | |
237 | ses->serverDomain = kzalloc(2 * (len + 1), GFP_KERNEL); /* BB FIXME wrong length */ | |
238 | if(ses->serverDomain != NULL) { | |
239 | cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len, | |
240 | nls_cp); | |
241 | ses->serverDomain[2*len] = 0; | |
242 | ses->serverDomain[(2*len) + 1] = 0; | |
243 | } | |
244 | data += 2 * (len + 1); | |
245 | words_left -= len + 1; | |
246 | ||
247 | cFYI(1,("words left: %d",words_left)); | |
248 | ||
249 | return rc; | |
250 | } | |
251 | ||
7c7b25bc | 252 | static int decode_ascii_ssetup(char ** pbcc_area, int bleft, struct cifsSesInfo *ses, |
3979877e SF |
253 | const struct nls_table * nls_cp) |
254 | { | |
255 | int rc = 0; | |
256 | int len; | |
257 | char * bcc_ptr = *pbcc_area; | |
258 | ||
259 | cFYI(1,("decode sessetup ascii. bleft %d", bleft)); | |
260 | ||
261 | len = strnlen(bcc_ptr, bleft); | |
262 | if(len >= bleft) | |
263 | return rc; | |
264 | ||
265 | if(ses->serverOS) | |
266 | kfree(ses->serverOS); | |
267 | ||
268 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
269 | if(ses->serverOS) | |
270 | strncpy(ses->serverOS, bcc_ptr, len); | |
9ac00b7d SF |
271 | if(strncmp(ses->serverOS, "OS/2",4) == 0) { |
272 | cFYI(1,("OS/2 server")); | |
273 | ses->flags |= CIFS_SES_OS2; | |
274 | } | |
3979877e SF |
275 | |
276 | bcc_ptr += len + 1; | |
277 | bleft -= len + 1; | |
278 | ||
279 | len = strnlen(bcc_ptr, bleft); | |
280 | if(len >= bleft) | |
281 | return rc; | |
282 | ||
283 | if(ses->serverNOS) | |
284 | kfree(ses->serverNOS); | |
285 | ||
286 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
287 | if(ses->serverNOS) | |
288 | strncpy(ses->serverNOS, bcc_ptr, len); | |
289 | ||
290 | bcc_ptr += len + 1; | |
291 | bleft -= len + 1; | |
292 | ||
293 | len = strnlen(bcc_ptr, bleft); | |
294 | if(len > bleft) | |
295 | return rc; | |
296 | ||
9ac00b7d SF |
297 | /* No domain field in LANMAN case. Domain is |
298 | returned by old servers in the SMB negprot response */ | |
299 | /* BB For newer servers which do not support Unicode, | |
300 | but thus do return domain here we could add parsing | |
301 | for it later, but it is not very important */ | |
3979877e SF |
302 | cFYI(1,("ascii: bytes left %d",bleft)); |
303 | ||
304 | return rc; | |
305 | } | |
306 | ||
307 | int | |
308 | CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time, | |
309 | const struct nls_table *nls_cp) | |
310 | { | |
311 | int rc = 0; | |
312 | int wct; | |
3979877e SF |
313 | struct smb_hdr *smb_buf; |
314 | char *bcc_ptr; | |
750d1151 | 315 | char *str_area; |
3979877e SF |
316 | SESSION_SETUP_ANDX *pSMB; |
317 | __u32 capabilities; | |
318 | int count; | |
319 | int resp_buf_type = 0; | |
750d1151 | 320 | struct kvec iov[2]; |
3979877e SF |
321 | enum securityEnum type; |
322 | __u16 action; | |
323 | int bytes_remaining; | |
254e55ed | 324 | |
3979877e SF |
325 | if(ses == NULL) |
326 | return -EINVAL; | |
327 | ||
328 | type = ses->server->secType; | |
f40c5628 SF |
329 | |
330 | cFYI(1,("sess setup type %d",type)); | |
3979877e SF |
331 | if(type == LANMAN) { |
332 | #ifndef CONFIG_CIFS_WEAK_PW_HASH | |
333 | /* LANMAN and plaintext are less secure and off by default. | |
334 | So we make this explicitly be turned on in kconfig (in the | |
335 | build) and turned on at runtime (changed from the default) | |
336 | in proc/fs/cifs or via mount parm. Unfortunately this is | |
337 | needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
338 | return -EOPNOTSUPP; | |
339 | #endif | |
340 | wct = 10; /* lanman 2 style sessionsetup */ | |
9312f675 SF |
341 | } else if((type == NTLM) || (type == NTLMv2)) { |
342 | /* For NTLMv2 failures eventually may need to retry NTLM */ | |
3979877e | 343 | wct = 13; /* old style NTLM sessionsetup */ |
9312f675 | 344 | } else /* same size for negotiate or auth, NTLMSSP or extended security */ |
3979877e SF |
345 | wct = 12; |
346 | ||
347 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
348 | (void **)&smb_buf); | |
349 | if(rc) | |
350 | return rc; | |
351 | ||
352 | pSMB = (SESSION_SETUP_ANDX *)smb_buf; | |
353 | ||
354 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
750d1151 SF |
355 | |
356 | /* we will send the SMB in two pieces, | |
357 | a fixed length beginning part, and a | |
358 | second part which will include the strings | |
359 | and rest of bcc area, in order to avoid having | |
360 | to do a large buffer 17K allocation */ | |
361 | iov[0].iov_base = (char *)pSMB; | |
362 | iov[0].iov_len = smb_buf->smb_buf_length + 4; | |
363 | ||
364 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
365 | str_area = kmalloc(2000, GFP_KERNEL); | |
366 | bcc_ptr = str_area; | |
3979877e | 367 | |
9ac00b7d SF |
368 | ses->flags &= ~CIFS_SES_LANMAN; |
369 | ||
3979877e SF |
370 | if(type == LANMAN) { |
371 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
7c7b25bc | 372 | char lnm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e SF |
373 | |
374 | /* no capabilities flags in old lanman negotiation */ | |
375 | ||
5ddaa683 | 376 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e SF |
377 | /* BB calculate hash with password */ |
378 | /* and copy into bcc */ | |
379 | ||
7c7b25bc | 380 | calc_lanman_hash(ses, lnm_session_key); |
9ac00b7d | 381 | ses->flags |= CIFS_SES_LANMAN; |
750d1151 | 382 | /* #ifdef CONFIG_CIFS_DEBUG2 |
3979877e | 383 | cifs_dump_mem("cryptkey: ",ses->server->cryptKey, |
7c7b25bc | 384 | CIFS_SESS_KEY_SIZE); |
750d1151 | 385 | #endif */ |
7c7b25bc SF |
386 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE); |
387 | bcc_ptr += CIFS_SESS_KEY_SIZE; | |
3979877e SF |
388 | |
389 | /* can not sign if LANMAN negotiated so no need | |
390 | to calculate signing key? but what if server | |
391 | changed to do higher than lanman dialect and | |
392 | we reconnected would we ever calc signing_key? */ | |
393 | ||
750d1151 | 394 | cFYI(1,("Negotiating LANMAN setting up strings")); |
3979877e SF |
395 | /* Unicode not allowed for LANMAN dialects */ |
396 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); | |
397 | #endif | |
398 | } else if (type == NTLM) { | |
7c7b25bc | 399 | char ntlm_session_key[CIFS_SESS_KEY_SIZE]; |
3979877e SF |
400 | |
401 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
402 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
7c7b25bc | 403 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e | 404 | pSMB->req_no_secext.CaseSensitivePasswordLength = |
7c7b25bc | 405 | cpu_to_le16(CIFS_SESS_KEY_SIZE); |
3979877e SF |
406 | |
407 | /* calculate session key */ | |
408 | SMBNTencrypt(ses->password, ses->server->cryptKey, | |
409 | ntlm_session_key); | |
410 | ||
411 | if(first_time) /* should this be moved into common code | |
412 | with similar ntlmv2 path? */ | |
750d1151 | 413 | cifs_calculate_mac_key(ses->server->mac_signing_key, |
3979877e SF |
414 | ntlm_session_key, ses->password); |
415 | /* copy session key */ | |
416 | ||
7c7b25bc SF |
417 | memcpy(bcc_ptr, (char *)ntlm_session_key,CIFS_SESS_KEY_SIZE); |
418 | bcc_ptr += CIFS_SESS_KEY_SIZE; | |
419 | memcpy(bcc_ptr, (char *)ntlm_session_key,CIFS_SESS_KEY_SIZE); | |
420 | bcc_ptr += CIFS_SESS_KEY_SIZE; | |
0223cf0b SF |
421 | if(ses->capabilities & CAP_UNICODE) { |
422 | /* unicode strings must be word aligned */ | |
423 | if (iov[0].iov_len % 2) { | |
424 | *bcc_ptr = 0; | |
425 | bcc_ptr++; | |
426 | } | |
7c7b25bc | 427 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 428 | } else |
7c7b25bc SF |
429 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
430 | } else if (type == NTLMv2) { | |
6d027cfd SF |
431 | char * v2_sess_key = |
432 | kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL); | |
f64b23ae SF |
433 | |
434 | /* BB FIXME change all users of v2_sess_key to | |
435 | struct ntlmv2_resp */ | |
7c7b25bc SF |
436 | |
437 | if(v2_sess_key == NULL) { | |
438 | cifs_small_buf_release(smb_buf); | |
439 | return -ENOMEM; | |
440 | } | |
441 | ||
442 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
443 | ||
444 | /* LM2 password would be here if we supported it */ | |
445 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
446 | /* cpu_to_le16(LM2_SESS_KEY_SIZE); */ | |
447 | ||
448 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
f64b23ae | 449 | cpu_to_le16(sizeof(struct ntlmv2_resp)); |
7c7b25bc SF |
450 | |
451 | /* calculate session key */ | |
1717ffc5 | 452 | setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp); |
7c7b25bc SF |
453 | if(first_time) /* should this be moved into common code |
454 | with similar ntlmv2 path? */ | |
455 | /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key, | |
456 | response BB FIXME, v2_sess_key); */ | |
457 | ||
458 | /* copy session key */ | |
459 | ||
460 | /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE); | |
461 | bcc_ptr += LM2_SESS_KEY_SIZE; */ | |
f64b23ae SF |
462 | memcpy(bcc_ptr, (char *)v2_sess_key, sizeof(struct ntlmv2_resp)); |
463 | bcc_ptr += sizeof(struct ntlmv2_resp); | |
464 | kfree(v2_sess_key); | |
0223cf0b SF |
465 | if(ses->capabilities & CAP_UNICODE) { |
466 | if(iov[0].iov_len % 2) { | |
467 | *bcc_ptr = 0; | |
468 | } bcc_ptr++; | |
3979877e | 469 | unicode_ssetup_strings(&bcc_ptr, ses, nls_cp); |
0223cf0b | 470 | } else |
3979877e SF |
471 | ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); |
472 | } else /* NTLMSSP or SPNEGO */ { | |
473 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
474 | capabilities |= CAP_EXTENDED_SECURITY; | |
475 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
476 | /* BB set password lengths */ | |
477 | } | |
478 | ||
750d1151 | 479 | count = (long) bcc_ptr - (long) str_area; |
3979877e SF |
480 | smb_buf->smb_buf_length += count; |
481 | ||
3979877e SF |
482 | BCC_LE(smb_buf) = cpu_to_le16(count); |
483 | ||
750d1151 SF |
484 | iov[1].iov_base = str_area; |
485 | iov[1].iov_len = count; | |
486 | rc = SendReceive2(xid, ses, iov, 2 /* num_iovecs */, &resp_buf_type, 0); | |
3979877e SF |
487 | /* SMB request buf freed in SendReceive2 */ |
488 | ||
489 | cFYI(1,("ssetup rc from sendrecv2 is %d",rc)); | |
490 | if(rc) | |
491 | goto ssetup_exit; | |
492 | ||
493 | pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; | |
494 | smb_buf = (struct smb_hdr *)iov[0].iov_base; | |
495 | ||
496 | if((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) { | |
497 | rc = -EIO; | |
498 | cERROR(1,("bad word count %d", smb_buf->WordCount)); | |
499 | goto ssetup_exit; | |
500 | } | |
501 | action = le16_to_cpu(pSMB->resp.Action); | |
502 | if (action & GUEST_LOGIN) | |
189acaae | 503 | cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */ |
3979877e SF |
504 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
505 | cFYI(1, ("UID = %d ", ses->Suid)); | |
506 | /* response can have either 3 or 4 word count - Samba sends 3 */ | |
507 | /* and lanman response is 3 */ | |
508 | bytes_remaining = BCC(smb_buf); | |
509 | bcc_ptr = pByteArea(smb_buf); | |
510 | ||
511 | if(smb_buf->WordCount == 4) { | |
512 | __u16 blob_len; | |
513 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
514 | bcc_ptr += blob_len; | |
515 | if(blob_len > bytes_remaining) { | |
516 | cERROR(1,("bad security blob length %d", blob_len)); | |
517 | rc = -EINVAL; | |
518 | goto ssetup_exit; | |
519 | } | |
520 | bytes_remaining -= blob_len; | |
521 | } | |
522 | ||
523 | /* BB check if Unicode and decode strings */ | |
524 | if(smb_buf->Flags2 & SMBFLG2_UNICODE) | |
525 | rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining, | |
526 | ses, nls_cp); | |
527 | else | |
528 | rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,nls_cp); | |
529 | ||
530 | ssetup_exit: | |
750d1151 | 531 | kfree(str_area); |
3979877e SF |
532 | if(resp_buf_type == CIFS_SMALL_BUFFER) { |
533 | cFYI(1,("ssetup freeing small buf %p", iov[0].iov_base)); | |
534 | cifs_small_buf_release(iov[0].iov_base); | |
535 | } else if(resp_buf_type == CIFS_LARGE_BUFFER) | |
536 | cifs_buf_release(iov[0].iov_base); | |
537 | ||
538 | return rc; | |
539 | } |