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Steve French39798772006-05-31 22:40:51 +00001/*
2 * fs/cifs/sess.c
3 *
4 * SMB/CIFS session setup handling routines
5 *
Steve Frenchd185cda2009-04-30 17:45:10 +00006 * Copyright (c) International Business Machines Corp., 2006, 2009
Steve French39798772006-05-31 22:40:51 +00007 * 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"
Steve French9c535882006-06-01 05:09:10 +000031#include <linux/utsname.h>
Steve French24424212007-11-16 23:37:35 +000032#include "cifs_spnego.h"
Steve French39798772006-05-31 22:40:51 +000033
Steve French39798772006-05-31 22:40:51 +000034extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
Steve French790fe572007-07-07 19:25:05 +000035 unsigned char *p24);
Steve French39798772006-05-31 22:40:51 +000036
Steve Frencheca6acf2009-02-20 05:43:09 +000037/* Checks if this is the first smb session to be reconnected after
38 the socket has been reestablished (so we know whether to use vc 0).
39 Called while holding the cifs_tcp_ses_lock, so do not block */
40static 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 */
64static __le16 get_next_vcnum(struct cifsSesInfo *ses)
65{
66 __u16 vcnum = 0;
67 struct list_head *tmp;
68 struct cifsSesInfo *tmp_ses;
69 __u16 max_vcs = ses->server->max_vcs;
70 __u16 i;
71 int free_vc_found = 0;
72
73 /* Quoting the MS-SMB specification: "Windows-based SMB servers set this
74 field to one but do not enforce this limit, which allows an SMB client
75 to establish more virtual circuits than allowed by this value ... but
76 other server implementations can enforce this limit." */
77 if (max_vcs < 2)
78 max_vcs = 0xFFFF;
79
80 write_lock(&cifs_tcp_ses_lock);
81 if ((ses->need_reconnect) && is_first_ses_reconnect(ses))
82 goto get_vc_num_exit; /* vcnum will be zero */
83 for (i = ses->server->srv_count - 1; i < max_vcs; i++) {
84 if (i == 0) /* this is the only connection, use vc 0 */
85 break;
86
87 free_vc_found = 1;
88
89 list_for_each(tmp, &ses->server->smb_ses_list) {
90 tmp_ses = list_entry(tmp, struct cifsSesInfo,
91 smb_ses_list);
92 if (tmp_ses->vcnum == i) {
93 free_vc_found = 0;
94 break; /* found duplicate, try next vcnum */
95 }
96 }
97 if (free_vc_found)
98 break; /* we found a vcnumber that will work - use it */
99 }
100
101 if (i == 0)
102 vcnum = 0; /* for most common case, ie if one smb session, use
103 vc zero. Also for case when no free vcnum, zero
104 is safest to send (some clients only send zero) */
105 else if (free_vc_found == 0)
106 vcnum = 1; /* we can not reuse vc=0 safely, since some servers
107 reset all uids on that, but 1 is ok. */
108 else
109 vcnum = i;
110 ses->vcnum = vcnum;
111get_vc_num_exit:
112 write_unlock(&cifs_tcp_ses_lock);
113
Steve French051a2a02009-05-01 16:21:04 +0000114 return cpu_to_le16(vcnum);
Steve Frencheca6acf2009-02-20 05:43:09 +0000115}
116
Steve French39798772006-05-31 22:40:51 +0000117static __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 */
Steve Frencheca6acf2009-02-20 05:43:09 +0000122 /* 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 */
Steve French39798772006-05-31 22:40:51 +0000126 pSMB->req.AndXCommand = 0xFF;
127 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
128 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
Steve Frencheca6acf2009-02-20 05:43:09 +0000129 pSMB->req.VcNumber = get_next_vcnum(ses);
Steve French39798772006-05-31 22:40:51 +0000130
131 /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
132
Steve French790fe572007-07-07 19:25:05 +0000133 /* BB verify whether signing required on neg or just on auth frame
Steve French39798772006-05-31 22:40:51 +0000134 (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
Steve French790fe572007-07-07 19:25:05 +0000139 if (ses->server->secMode &
140 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Steve French39798772006-05-31 22:40:51 +0000141 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 }
Steve French26f57362007-08-30 22:09:15 +0000155 if (ses->capabilities & CAP_UNIX)
Steve French39798772006-05-31 22:40:51 +0000156 capabilities |= CAP_UNIX;
Steve French39798772006-05-31 22:40:51 +0000157
Steve French39798772006-05-31 22:40:51 +0000158 return capabilities;
159}
160
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000161static void
162unicode_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
184static 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
Steve French38702532007-07-08 15:40:40 +0000207static void unicode_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
Steve French790fe572007-07-07 19:25:05 +0000208 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000209{
Steve French790fe572007-07-07 19:25:05 +0000210 char *bcc_ptr = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000211 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
Steve French0223cf02006-06-27 19:50:57 +0000216 /* unicode strings, must be word aligned before the call */
217/* if ((long) bcc_ptr % 2) {
Steve French39798772006-05-31 22:40:51 +0000218 *bcc_ptr = 0;
219 bcc_ptr++;
Steve French0223cf02006-06-27 19:50:57 +0000220 } */
Steve French39798772006-05-31 22:40:51 +0000221 /* copy user */
Steve French790fe572007-07-07 19:25:05 +0000222 if (ses->userName == NULL) {
Steve French6e659c62006-11-08 23:10:46 +0000223 /* null user mount */
224 *bcc_ptr = 0;
225 *(bcc_ptr+1) = 0;
Steve French39798772006-05-31 22:40:51 +0000226 } else { /* 300 should be long enough for any conceivable user name */
227 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName,
228 300, nls_cp);
229 }
230 bcc_ptr += 2 * bytes_ret;
231 bcc_ptr += 2; /* account for null termination */
Steve French39798772006-05-31 22:40:51 +0000232
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000233 unicode_domain_string(&bcc_ptr, ses, nls_cp);
234 unicode_oslm_strings(&bcc_ptr, nls_cp);
Steve French39798772006-05-31 22:40:51 +0000235
236 *pbcc_area = bcc_ptr;
237}
238
Steve French38702532007-07-08 15:40:40 +0000239static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
Steve French790fe572007-07-07 19:25:05 +0000240 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000241{
Steve French790fe572007-07-07 19:25:05 +0000242 char *bcc_ptr = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000243
244 /* copy user */
245 /* BB what about null user mounts - check that we do this BB */
Steve French790fe572007-07-07 19:25:05 +0000246 /* copy user */
247 if (ses->userName == NULL) {
248 /* BB what about null user mounts - check that we do this BB */
249 } else { /* 300 should be long enough for any conceivable user name */
250 strncpy(bcc_ptr, ses->userName, 300);
251 }
Steve French39798772006-05-31 22:40:51 +0000252 /* BB improve check for overflow */
Steve French790fe572007-07-07 19:25:05 +0000253 bcc_ptr += strnlen(ses->userName, 300);
Steve French39798772006-05-31 22:40:51 +0000254 *bcc_ptr = 0;
Steve French790fe572007-07-07 19:25:05 +0000255 bcc_ptr++; /* account for null termination */
Steve French39798772006-05-31 22:40:51 +0000256
Steve French790fe572007-07-07 19:25:05 +0000257 /* copy domain */
258
259 if (ses->domainName != NULL) {
260 strncpy(bcc_ptr, ses->domainName, 256);
Steve French39798772006-05-31 22:40:51 +0000261 bcc_ptr += strnlen(ses->domainName, 256);
Steve French790fe572007-07-07 19:25:05 +0000262 } /* else we will send a null domain name
Steve French6e659c62006-11-08 23:10:46 +0000263 so the server will default to its own domain */
Steve French39798772006-05-31 22:40:51 +0000264 *bcc_ptr = 0;
265 bcc_ptr++;
266
267 /* BB check for overflow here */
268
269 strcpy(bcc_ptr, "Linux version ");
270 bcc_ptr += strlen("Linux version ");
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700271 strcpy(bcc_ptr, init_utsname()->release);
272 bcc_ptr += strlen(init_utsname()->release) + 1;
Steve French39798772006-05-31 22:40:51 +0000273
274 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
275 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
276
Steve French790fe572007-07-07 19:25:05 +0000277 *pbcc_area = bcc_ptr;
Steve French39798772006-05-31 22:40:51 +0000278}
279
Jeff Layton59140792009-04-30 07:16:21 -0400280static void
281decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses,
282 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000283{
Jeff Layton59140792009-04-30 07:16:21 -0400284 int len;
Steve French790fe572007-07-07 19:25:05 +0000285 char *data = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000286
Steve French790fe572007-07-07 19:25:05 +0000287 cFYI(1, ("bleft %d", bleft));
Steve French39798772006-05-31 22:40:51 +0000288
Jeff Layton27b87fe2009-04-14 11:00:53 -0400289 /*
290 * Windows servers do not always double null terminate their final
291 * Unicode string. Check to see if there are an uneven number of bytes
292 * left. If so, then add an extra NULL pad byte to the end of the
293 * response.
294 *
295 * See section 2.7.2 in "Implementing CIFS" for details
296 */
297 if (bleft % 2) {
298 data[bleft] = 0;
299 ++bleft;
300 }
Steve French50c2f752007-07-13 00:33:32 +0000301
Steve French26f57362007-08-30 22:09:15 +0000302 kfree(ses->serverOS);
Steve Frenchd185cda2009-04-30 17:45:10 +0000303 ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
Jeff Layton59140792009-04-30 07:16:21 -0400304 cFYI(1, ("serverOS=%s", ses->serverOS));
305 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
306 data += len;
307 bleft -= len;
308 if (bleft <= 0)
309 return;
Steve French39798772006-05-31 22:40:51 +0000310
Steve French26f57362007-08-30 22:09:15 +0000311 kfree(ses->serverNOS);
Steve Frenchd185cda2009-04-30 17:45:10 +0000312 ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
Jeff Layton59140792009-04-30 07:16:21 -0400313 cFYI(1, ("serverNOS=%s", ses->serverNOS));
314 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
315 data += len;
316 bleft -= len;
317 if (bleft <= 0)
318 return;
Steve French39798772006-05-31 22:40:51 +0000319
Steve French26f57362007-08-30 22:09:15 +0000320 kfree(ses->serverDomain);
Steve Frenchd185cda2009-04-30 17:45:10 +0000321 ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
Jeff Layton59140792009-04-30 07:16:21 -0400322 cFYI(1, ("serverDomain=%s", ses->serverDomain));
Steve French790fe572007-07-07 19:25:05 +0000323
Jeff Layton59140792009-04-30 07:16:21 -0400324 return;
Steve French39798772006-05-31 22:40:51 +0000325}
326
Steve French790fe572007-07-07 19:25:05 +0000327static int decode_ascii_ssetup(char **pbcc_area, int bleft,
328 struct cifsSesInfo *ses,
329 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000330{
331 int rc = 0;
332 int len;
Steve French790fe572007-07-07 19:25:05 +0000333 char *bcc_ptr = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000334
Steve French790fe572007-07-07 19:25:05 +0000335 cFYI(1, ("decode sessetup ascii. bleft %d", bleft));
Steve French50c2f752007-07-13 00:33:32 +0000336
Steve French39798772006-05-31 22:40:51 +0000337 len = strnlen(bcc_ptr, bleft);
Steve French790fe572007-07-07 19:25:05 +0000338 if (len >= bleft)
Steve French39798772006-05-31 22:40:51 +0000339 return rc;
Steve French50c2f752007-07-13 00:33:32 +0000340
Steve French26f57362007-08-30 22:09:15 +0000341 kfree(ses->serverOS);
Steve French39798772006-05-31 22:40:51 +0000342
343 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +0000344 if (ses->serverOS)
Steve French39798772006-05-31 22:40:51 +0000345 strncpy(ses->serverOS, bcc_ptr, len);
Steve French790fe572007-07-07 19:25:05 +0000346 if (strncmp(ses->serverOS, "OS/2", 4) == 0) {
347 cFYI(1, ("OS/2 server"));
Steve French9ac00b72006-09-30 04:13:17 +0000348 ses->flags |= CIFS_SES_OS2;
349 }
Steve French39798772006-05-31 22:40:51 +0000350
351 bcc_ptr += len + 1;
352 bleft -= len + 1;
353
354 len = strnlen(bcc_ptr, bleft);
Steve French790fe572007-07-07 19:25:05 +0000355 if (len >= bleft)
Steve French39798772006-05-31 22:40:51 +0000356 return rc;
357
Steve French26f57362007-08-30 22:09:15 +0000358 kfree(ses->serverNOS);
Steve French39798772006-05-31 22:40:51 +0000359
360 ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +0000361 if (ses->serverNOS)
Steve French39798772006-05-31 22:40:51 +0000362 strncpy(ses->serverNOS, bcc_ptr, len);
363
364 bcc_ptr += len + 1;
365 bleft -= len + 1;
366
Steve French790fe572007-07-07 19:25:05 +0000367 len = strnlen(bcc_ptr, bleft);
368 if (len > bleft)
369 return rc;
Steve French39798772006-05-31 22:40:51 +0000370
Steve French9ac00b72006-09-30 04:13:17 +0000371 /* No domain field in LANMAN case. Domain is
372 returned by old servers in the SMB negprot response */
373 /* BB For newer servers which do not support Unicode,
374 but thus do return domain here we could add parsing
375 for it later, but it is not very important */
Steve French790fe572007-07-07 19:25:05 +0000376 cFYI(1, ("ascii: bytes left %d", bleft));
Steve French39798772006-05-31 22:40:51 +0000377
378 return rc;
379}
380
Steve French0b3cc8582009-05-04 08:37:12 +0000381static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
382 struct cifsSesInfo *ses)
383{
384 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
385
386 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
387 cERROR(1, ("challenge blob len %d too small", blob_len));
388 return -EINVAL;
389 }
390
391 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
392 cERROR(1, ("blob signature incorrect %s", pblob->Signature));
393 return -EINVAL;
394 }
395 if (pblob->MessageType != NtLmChallenge) {
396 cERROR(1, ("Incorrect message type %d", pblob->MessageType));
397 return -EINVAL;
398 }
399
400 memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
401 /* BB we could decode pblob->NegotiateFlags; some may be useful */
402 /* In particular we can examine sign flags */
403 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
404 we must set the MIC field of the AUTHENTICATE_MESSAGE */
405
406 return 0;
407}
408
409#ifdef CONFIG_CIFS_EXPERIMENTAL
410/* BB Move to ntlmssp.c eventually */
411
412/* We do not malloc the blob, it is passed in pbuffer, because
413 it is fixed size, and small, making this approach cleaner */
414static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
415 struct cifsSesInfo *ses)
416{
417 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
418 __u32 flags;
419
420 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
421 sec_blob->MessageType = NtLmNegotiate;
422
423 /* BB is NTLMV2 session security format easier to use here? */
424 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
425 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
426 NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
427 if (ses->server->secMode &
428 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
429 flags |= NTLMSSP_NEGOTIATE_SIGN;
430 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
431 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
432
433 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
434
435 sec_blob->WorkstationName.BufferOffset = 0;
436 sec_blob->WorkstationName.Length = 0;
437 sec_blob->WorkstationName.MaximumLength = 0;
438
439 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
440 sec_blob->DomainName.BufferOffset = 0;
441 sec_blob->DomainName.Length = 0;
442 sec_blob->DomainName.MaximumLength = 0;
443}
444
445/* We do not malloc the blob, it is passed in pbuffer, because its
446 maximum possible size is fixed and small, making this approach cleaner.
447 This function returns the length of the data in the blob */
448static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
449 struct cifsSesInfo *ses,
450 const struct nls_table *nls_cp, int first)
451{
452 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
453 __u32 flags;
454 unsigned char *tmp;
455 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
456
457 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
458 sec_blob->MessageType = NtLmAuthenticate;
459
460 flags = NTLMSSP_NEGOTIATE_56 |
461 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
462 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
463 NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
464 if (ses->server->secMode &
465 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
466 flags |= NTLMSSP_NEGOTIATE_SIGN;
467 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
468 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
469
470 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
471 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
472
473 sec_blob->LmChallengeResponse.BufferOffset =
474 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
475 sec_blob->LmChallengeResponse.Length = 0;
476 sec_blob->LmChallengeResponse.MaximumLength = 0;
477
478 /* calculate session key, BB what about adding similar ntlmv2 path? */
479 SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key);
480 if (first)
481 cifs_calculate_mac_key(&ses->server->mac_signing_key,
482 ntlm_session_key, ses->password);
483
484 memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE);
485 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
486 sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE);
487 sec_blob->NtChallengeResponse.MaximumLength =
488 cpu_to_le16(CIFS_SESS_KEY_SIZE);
489
490 tmp += CIFS_SESS_KEY_SIZE;
491
492 if (ses->domainName == NULL) {
493 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
494 sec_blob->DomainName.Length = 0;
495 sec_blob->DomainName.MaximumLength = 0;
496 tmp += 2;
497 } else {
498 int len;
499 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
500 MAX_USERNAME_SIZE, nls_cp);
501 len *= 2; /* unicode is 2 bytes each */
502 len += 2; /* trailing null */
503 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
504 sec_blob->DomainName.Length = cpu_to_le16(len);
505 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
506 tmp += len;
507 }
508
509 if (ses->userName == NULL) {
510 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
511 sec_blob->UserName.Length = 0;
512 sec_blob->UserName.MaximumLength = 0;
513 tmp += 2;
514 } else {
515 int len;
516 len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
517 MAX_USERNAME_SIZE, nls_cp);
518 len *= 2; /* unicode is 2 bytes each */
519 len += 2; /* trailing null */
520 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
521 sec_blob->UserName.Length = cpu_to_le16(len);
522 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
523 tmp += len;
524 }
525
526 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
527 sec_blob->WorkstationName.Length = 0;
528 sec_blob->WorkstationName.MaximumLength = 0;
529 tmp += 2;
530
531 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
532 sec_blob->SessionKey.Length = 0;
533 sec_blob->SessionKey.MaximumLength = 0;
534 return tmp - pbuffer;
535}
536
537
538static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
539 struct cifsSesInfo *ses)
540{
541 build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
542 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
543
544 return;
545}
546
547static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB,
548 struct cifsSesInfo *ses,
549 const struct nls_table *nls, int first_time)
550{
551 int bloblen;
552
553 bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls,
554 first_time);
555 pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen);
556
557 return bloblen;
558}
559#endif
560
Steve French790fe572007-07-07 19:25:05 +0000561int
Steve French39798772006-05-31 22:40:51 +0000562CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
563 const struct nls_table *nls_cp)
564{
565 int rc = 0;
566 int wct;
Steve French39798772006-05-31 22:40:51 +0000567 struct smb_hdr *smb_buf;
568 char *bcc_ptr;
Steve French750d1152006-06-27 06:28:30 +0000569 char *str_area;
Steve French39798772006-05-31 22:40:51 +0000570 SESSION_SETUP_ANDX *pSMB;
571 __u32 capabilities;
572 int count;
Steve French24424212007-11-16 23:37:35 +0000573 int resp_buf_type;
574 struct kvec iov[3];
Steve French39798772006-05-31 22:40:51 +0000575 enum securityEnum type;
576 __u16 action;
577 int bytes_remaining;
Steve French24424212007-11-16 23:37:35 +0000578 struct key *spnego_key = NULL;
Steve French0b3cc8582009-05-04 08:37:12 +0000579 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
Steve French254e55e2006-06-04 05:53:15 +0000580
Steve French790fe572007-07-07 19:25:05 +0000581 if (ses == NULL)
Steve French39798772006-05-31 22:40:51 +0000582 return -EINVAL;
583
584 type = ses->server->secType;
Steve Frenchf40c5622006-06-28 00:13:38 +0000585
Steve French790fe572007-07-07 19:25:05 +0000586 cFYI(1, ("sess setup type %d", type));
Steve French0b3cc8582009-05-04 08:37:12 +0000587ssetup_ntlmssp_authenticate:
588 if (phase == NtLmChallenge)
589 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
590
Steve French790fe572007-07-07 19:25:05 +0000591 if (type == LANMAN) {
Steve French39798772006-05-31 22:40:51 +0000592#ifndef CONFIG_CIFS_WEAK_PW_HASH
593 /* LANMAN and plaintext are less secure and off by default.
594 So we make this explicitly be turned on in kconfig (in the
595 build) and turned on at runtime (changed from the default)
596 in proc/fs/cifs or via mount parm. Unfortunately this is
597 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
598 return -EOPNOTSUPP;
599#endif
600 wct = 10; /* lanman 2 style sessionsetup */
Steve French790fe572007-07-07 19:25:05 +0000601 } else if ((type == NTLM) || (type == NTLMv2)) {
Steve French9312f672006-06-04 22:21:07 +0000602 /* For NTLMv2 failures eventually may need to retry NTLM */
Steve French39798772006-05-31 22:40:51 +0000603 wct = 13; /* old style NTLM sessionsetup */
Steve French790fe572007-07-07 19:25:05 +0000604 } else /* same size: negotiate or auth, NTLMSSP or extended security */
Steve French39798772006-05-31 22:40:51 +0000605 wct = 12;
606
607 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
608 (void **)&smb_buf);
Steve French790fe572007-07-07 19:25:05 +0000609 if (rc)
Steve French39798772006-05-31 22:40:51 +0000610 return rc;
611
612 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
613
614 capabilities = cifs_ssetup_hdr(ses, pSMB);
Steve French750d1152006-06-27 06:28:30 +0000615
Steve French24424212007-11-16 23:37:35 +0000616 /* we will send the SMB in three pieces:
617 a fixed length beginning part, an optional
618 SPNEGO blob (which can be zero length), and a
619 last part which will include the strings
620 and rest of bcc area. This allows us to avoid
621 a large buffer 17K allocation */
Steve French790fe572007-07-07 19:25:05 +0000622 iov[0].iov_base = (char *)pSMB;
623 iov[0].iov_len = smb_buf->smb_buf_length + 4;
Steve French750d1152006-06-27 06:28:30 +0000624
Steve French24424212007-11-16 23:37:35 +0000625 /* setting this here allows the code at the end of the function
626 to free the request buffer if there's an error */
627 resp_buf_type = CIFS_SMALL_BUFFER;
628
Steve French750d1152006-06-27 06:28:30 +0000629 /* 2000 big enough to fit max user, domain, NOS name etc. */
630 str_area = kmalloc(2000, GFP_KERNEL);
Cyrill Gorcunov5e6e6232007-08-18 00:15:20 +0000631 if (str_area == NULL) {
Steve French24424212007-11-16 23:37:35 +0000632 rc = -ENOMEM;
633 goto ssetup_exit;
Cyrill Gorcunov5e6e6232007-08-18 00:15:20 +0000634 }
Steve French750d1152006-06-27 06:28:30 +0000635 bcc_ptr = str_area;
Steve French39798772006-05-31 22:40:51 +0000636
Steve French9ac00b72006-09-30 04:13:17 +0000637 ses->flags &= ~CIFS_SES_LANMAN;
638
Steve French24424212007-11-16 23:37:35 +0000639 iov[1].iov_base = NULL;
640 iov[1].iov_len = 0;
641
Steve French790fe572007-07-07 19:25:05 +0000642 if (type == LANMAN) {
Steve French39798772006-05-31 22:40:51 +0000643#ifdef CONFIG_CIFS_WEAK_PW_HASH
Steve French7c7b25b2006-06-01 19:20:10 +0000644 char lnm_session_key[CIFS_SESS_KEY_SIZE];
Steve French39798772006-05-31 22:40:51 +0000645
Steve Frenchc76da9d2008-08-28 15:32:22 +0000646 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
647
Steve French39798772006-05-31 22:40:51 +0000648 /* no capabilities flags in old lanman negotiation */
649
Steve French790fe572007-07-07 19:25:05 +0000650 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French39798772006-05-31 22:40:51 +0000651 /* BB calculate hash with password */
652 /* and copy into bcc */
653
Jeff Layton4e53a3f2008-12-05 20:41:21 -0500654 calc_lanman_hash(ses->password, ses->server->cryptKey,
655 ses->server->secMode & SECMODE_PW_ENCRYPT ?
656 true : false, lnm_session_key);
657
Steve French790fe572007-07-07 19:25:05 +0000658 ses->flags |= CIFS_SES_LANMAN;
Steve French7c7b25b2006-06-01 19:20:10 +0000659 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
660 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French39798772006-05-31 22:40:51 +0000661
662 /* can not sign if LANMAN negotiated so no need
663 to calculate signing key? but what if server
664 changed to do higher than lanman dialect and
665 we reconnected would we ever calc signing_key? */
666
Steve French790fe572007-07-07 19:25:05 +0000667 cFYI(1, ("Negotiating LANMAN setting up strings"));
Steve French39798772006-05-31 22:40:51 +0000668 /* Unicode not allowed for LANMAN dialects */
669 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000670#endif
Steve French39798772006-05-31 22:40:51 +0000671 } else if (type == NTLM) {
Steve French7c7b25b2006-06-01 19:20:10 +0000672 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
Steve French39798772006-05-31 22:40:51 +0000673
674 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
675 pSMB->req_no_secext.CaseInsensitivePasswordLength =
Steve French7c7b25b2006-06-01 19:20:10 +0000676 cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French39798772006-05-31 22:40:51 +0000677 pSMB->req_no_secext.CaseSensitivePasswordLength =
Steve French7c7b25b2006-06-01 19:20:10 +0000678 cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French50c2f752007-07-13 00:33:32 +0000679
Steve French39798772006-05-31 22:40:51 +0000680 /* calculate session key */
681 SMBNTencrypt(ses->password, ses->server->cryptKey,
682 ntlm_session_key);
683
Steve French790fe572007-07-07 19:25:05 +0000684 if (first_time) /* should this be moved into common code
Steve French39798772006-05-31 22:40:51 +0000685 with similar ntlmv2 path? */
Steve Frenchb609f062007-07-09 07:55:14 +0000686 cifs_calculate_mac_key(&ses->server->mac_signing_key,
Steve French39798772006-05-31 22:40:51 +0000687 ntlm_session_key, ses->password);
688 /* copy session key */
689
Steve French790fe572007-07-07 19:25:05 +0000690 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000691 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French790fe572007-07-07 19:25:05 +0000692 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000693 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French790fe572007-07-07 19:25:05 +0000694 if (ses->capabilities & CAP_UNICODE) {
Steve French0223cf02006-06-27 19:50:57 +0000695 /* unicode strings must be word aligned */
696 if (iov[0].iov_len % 2) {
697 *bcc_ptr = 0;
Steve French790fe572007-07-07 19:25:05 +0000698 bcc_ptr++;
699 }
Steve French7c7b25b2006-06-01 19:20:10 +0000700 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French0223cf02006-06-27 19:50:57 +0000701 } else
Steve French7c7b25b2006-06-01 19:20:10 +0000702 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
703 } else if (type == NTLMv2) {
Steve French790fe572007-07-07 19:25:05 +0000704 char *v2_sess_key =
Steve French6d027cf2006-06-05 16:26:05 +0000705 kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
Steve Frenchf64b23a2006-06-05 05:27:37 +0000706
707 /* BB FIXME change all users of v2_sess_key to
708 struct ntlmv2_resp */
Steve French7c7b25b2006-06-01 19:20:10 +0000709
Steve French790fe572007-07-07 19:25:05 +0000710 if (v2_sess_key == NULL) {
Steve French24424212007-11-16 23:37:35 +0000711 rc = -ENOMEM;
712 goto ssetup_exit;
Steve French7c7b25b2006-06-01 19:20:10 +0000713 }
714
715 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
716
717 /* LM2 password would be here if we supported it */
718 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
719 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
720
721 pSMB->req_no_secext.CaseSensitivePasswordLength =
Steve Frenchf64b23a2006-06-05 05:27:37 +0000722 cpu_to_le16(sizeof(struct ntlmv2_resp));
Steve French7c7b25b2006-06-01 19:20:10 +0000723
724 /* calculate session key */
Steve French1717ffc2006-06-08 05:41:32 +0000725 setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000726 if (first_time) /* should this be moved into common code
727 with similar ntlmv2 path? */
Steve French7c7b25b2006-06-01 19:20:10 +0000728 /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key,
729 response BB FIXME, v2_sess_key); */
730
731 /* copy session key */
732
733 /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
734 bcc_ptr += LM2_SESS_KEY_SIZE; */
Steve French38702532007-07-08 15:40:40 +0000735 memcpy(bcc_ptr, (char *)v2_sess_key,
736 sizeof(struct ntlmv2_resp));
Steve Frenchf64b23a2006-06-05 05:27:37 +0000737 bcc_ptr += sizeof(struct ntlmv2_resp);
738 kfree(v2_sess_key);
Steve French790fe572007-07-07 19:25:05 +0000739 if (ses->capabilities & CAP_UNICODE) {
740 if (iov[0].iov_len % 2) {
Steve French0223cf02006-06-27 19:50:57 +0000741 *bcc_ptr = 0;
Steve French26f57362007-08-30 22:09:15 +0000742 bcc_ptr++;
743 }
Steve French39798772006-05-31 22:40:51 +0000744 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French0223cf02006-06-27 19:50:57 +0000745 } else
Steve French39798772006-05-31 22:40:51 +0000746 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve Frenchc16fefa2008-08-19 19:35:33 +0000747 } else if (type == Kerberos || type == MSKerberos) {
Steve French24424212007-11-16 23:37:35 +0000748#ifdef CONFIG_CIFS_UPCALL
749 struct cifs_spnego_msg *msg;
750 spnego_key = cifs_get_spnego_key(ses);
751 if (IS_ERR(spnego_key)) {
752 rc = PTR_ERR(spnego_key);
753 spnego_key = NULL;
754 goto ssetup_exit;
755 }
756
757 msg = spnego_key->payload.data;
Steve French6ce5eec2008-08-26 00:37:14 +0000758 /* check version field to make sure that cifs.upcall is
759 sending us a response in an expected form */
760 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
761 cERROR(1, ("incorrect version of cifs.upcall (expected"
762 " %d but got %d)",
763 CIFS_SPNEGO_UPCALL_VERSION, msg->version));
764 rc = -EKEYREJECTED;
765 goto ssetup_exit;
766 }
Steve French24424212007-11-16 23:37:35 +0000767 /* bail out if key is too long */
768 if (msg->sesskey_len >
769 sizeof(ses->server->mac_signing_key.data.krb5)) {
770 cERROR(1, ("Kerberos signing key too long (%u bytes)",
771 msg->sesskey_len));
772 rc = -EOVERFLOW;
773 goto ssetup_exit;
774 }
Jeff Layton1a675702007-12-31 04:03:02 +0000775 if (first_time) {
776 ses->server->mac_signing_key.len = msg->sesskey_len;
777 memcpy(ses->server->mac_signing_key.data.krb5,
778 msg->data, msg->sesskey_len);
779 }
Steve French39798772006-05-31 22:40:51 +0000780 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
781 capabilities |= CAP_EXTENDED_SECURITY;
782 pSMB->req.Capabilities = cpu_to_le32(capabilities);
Steve French24424212007-11-16 23:37:35 +0000783 iov[1].iov_base = msg->data + msg->sesskey_len;
784 iov[1].iov_len = msg->secblob_len;
785 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
786
787 if (ses->capabilities & CAP_UNICODE) {
788 /* unicode strings must be word aligned */
Jeff Layton28c5a022007-12-31 04:56:21 +0000789 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
Steve French24424212007-11-16 23:37:35 +0000790 *bcc_ptr = 0;
791 bcc_ptr++;
792 }
793 unicode_oslm_strings(&bcc_ptr, nls_cp);
794 unicode_domain_string(&bcc_ptr, ses, nls_cp);
795 } else
796 /* BB: is this right? */
797 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
798#else /* ! CONFIG_CIFS_UPCALL */
799 cERROR(1, ("Kerberos negotiated but upcall support disabled!"));
800 rc = -ENOSYS;
801 goto ssetup_exit;
802#endif /* CONFIG_CIFS_UPCALL */
803 } else {
Steve French0b3cc8582009-05-04 08:37:12 +0000804#ifdef CONFIG_CIFS_EXPERIMENTAL
805 if ((experimEnabled > 1) && (type == RawNTLMSSP)) {
806 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
807 cERROR(1, ("NTLMSSP requires Unicode support"));
808 rc = -ENOSYS;
809 goto ssetup_exit;
810 }
811
812 cFYI(1, ("ntlmssp session setup phase %d", phase));
813 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
814 capabilities |= CAP_EXTENDED_SECURITY;
815 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
816 if (phase == NtLmNegotiate) {
817 setup_ntlmssp_neg_req(pSMB, ses);
818 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
819 } else if (phase == NtLmAuthenticate) {
820 int blob_len;
821 blob_len = setup_ntlmssp_auth_req(pSMB, ses,
822 nls_cp,
823 first_time);
824 iov[1].iov_len = blob_len;
Steve French844823c2009-05-06 00:48:30 +0000825 /* Make sure that we tell the server that we
826 are using the uid that it just gave us back
827 on the response (challenge) */
828 smb_buf->Uid = ses->Suid;
Steve French0b3cc8582009-05-04 08:37:12 +0000829 } else {
830 cERROR(1, ("invalid phase %d", phase));
831 rc = -ENOSYS;
832 goto ssetup_exit;
833 }
834 iov[1].iov_base = &pSMB->req.SecurityBlob[0];
835 /* unicode strings must be word aligned */
836 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
837 *bcc_ptr = 0;
838 bcc_ptr++;
839 }
840 unicode_oslm_strings(&bcc_ptr, nls_cp);
841 } else {
842 cERROR(1, ("secType %d not supported!", type));
843 rc = -ENOSYS;
844 goto ssetup_exit;
845 }
846#else
Steve French24424212007-11-16 23:37:35 +0000847 cERROR(1, ("secType %d not supported!", type));
848 rc = -ENOSYS;
849 goto ssetup_exit;
Steve French0b3cc8582009-05-04 08:37:12 +0000850#endif
Steve French39798772006-05-31 22:40:51 +0000851 }
852
Steve French24424212007-11-16 23:37:35 +0000853 iov[2].iov_base = str_area;
854 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
855
856 count = iov[1].iov_len + iov[2].iov_len;
Steve French39798772006-05-31 22:40:51 +0000857 smb_buf->smb_buf_length += count;
858
Steve French39798772006-05-31 22:40:51 +0000859 BCC_LE(smb_buf) = cpu_to_le16(count);
860
Steve French24424212007-11-16 23:37:35 +0000861 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
Steve French133672e2007-11-13 22:41:37 +0000862 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
Steve French39798772006-05-31 22:40:51 +0000863 /* SMB request buf freed in SendReceive2 */
864
Steve French790fe572007-07-07 19:25:05 +0000865 cFYI(1, ("ssetup rc from sendrecv2 is %d", rc));
Steve French39798772006-05-31 22:40:51 +0000866
867 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
868 smb_buf = (struct smb_hdr *)iov[0].iov_base;
869
Steve French0b3cc8582009-05-04 08:37:12 +0000870 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
871 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
872 if (phase != NtLmNegotiate) {
873 cERROR(1, ("Unexpected more processing error"));
874 goto ssetup_exit;
875 }
876 /* NTLMSSP Negotiate sent now processing challenge (response) */
877 phase = NtLmChallenge; /* process ntlmssp challenge */
878 rc = 0; /* MORE_PROC rc is not an error here, but expected */
879 }
880 if (rc)
881 goto ssetup_exit;
882
Steve French790fe572007-07-07 19:25:05 +0000883 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
Steve French39798772006-05-31 22:40:51 +0000884 rc = -EIO;
Steve French790fe572007-07-07 19:25:05 +0000885 cERROR(1, ("bad word count %d", smb_buf->WordCount));
Steve French39798772006-05-31 22:40:51 +0000886 goto ssetup_exit;
887 }
888 action = le16_to_cpu(pSMB->resp.Action);
889 if (action & GUEST_LOGIN)
Steve French189acaa2006-06-23 02:33:48 +0000890 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
Steve French39798772006-05-31 22:40:51 +0000891 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
892 cFYI(1, ("UID = %d ", ses->Suid));
893 /* response can have either 3 or 4 word count - Samba sends 3 */
894 /* and lanman response is 3 */
895 bytes_remaining = BCC(smb_buf);
896 bcc_ptr = pByteArea(smb_buf);
897
Steve French790fe572007-07-07 19:25:05 +0000898 if (smb_buf->WordCount == 4) {
Steve French39798772006-05-31 22:40:51 +0000899 __u16 blob_len;
900 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
Steve French790fe572007-07-07 19:25:05 +0000901 if (blob_len > bytes_remaining) {
902 cERROR(1, ("bad security blob length %d", blob_len));
Steve French39798772006-05-31 22:40:51 +0000903 rc = -EINVAL;
904 goto ssetup_exit;
905 }
Steve French0b3cc8582009-05-04 08:37:12 +0000906 if (phase == NtLmChallenge) {
907 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
908 /* now goto beginning for ntlmssp authenticate phase */
909 if (rc)
910 goto ssetup_exit;
911 }
912 bcc_ptr += blob_len;
Steve French39798772006-05-31 22:40:51 +0000913 bytes_remaining -= blob_len;
Steve French790fe572007-07-07 19:25:05 +0000914 }
Steve French39798772006-05-31 22:40:51 +0000915
916 /* BB check if Unicode and decode strings */
Jeff Layton27b87fe2009-04-14 11:00:53 -0400917 if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
918 /* unicode string area must be word-aligned */
919 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
920 ++bcc_ptr;
921 --bytes_remaining;
922 }
Jeff Layton59140792009-04-30 07:16:21 -0400923 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
Jeff Layton27b87fe2009-04-14 11:00:53 -0400924 } else {
Steve French63135e02007-07-17 17:34:02 +0000925 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
926 ses, nls_cp);
Jeff Layton27b87fe2009-04-14 11:00:53 -0400927 }
Steve French50c2f752007-07-13 00:33:32 +0000928
Steve French39798772006-05-31 22:40:51 +0000929ssetup_exit:
Jeff Laytondfd15c462008-09-24 11:32:59 -0400930 if (spnego_key) {
931 key_revoke(spnego_key);
Steve French24424212007-11-16 23:37:35 +0000932 key_put(spnego_key);
Jeff Laytondfd15c462008-09-24 11:32:59 -0400933 }
Steve French750d1152006-06-27 06:28:30 +0000934 kfree(str_area);
Steve French790fe572007-07-07 19:25:05 +0000935 if (resp_buf_type == CIFS_SMALL_BUFFER) {
936 cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base));
Steve French39798772006-05-31 22:40:51 +0000937 cifs_small_buf_release(iov[0].iov_base);
Steve French790fe572007-07-07 19:25:05 +0000938 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
Steve French39798772006-05-31 22:40:51 +0000939 cifs_buf_release(iov[0].iov_base);
940
Steve French0b3cc8582009-05-04 08:37:12 +0000941 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
942 if ((phase == NtLmChallenge) && (rc == 0))
943 goto ssetup_ntlmssp_authenticate;
944
Steve French39798772006-05-31 22:40:51 +0000945 return rc;
946}