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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 French790fe572007-07-07 19:25:05 +00006 * Copyright (c) International Business Machines Corp., 2006, 2007
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 French39798772006-05-31 22:40:51 +000037static __u32 cifs_ssetup_hdr(struct cifsSesInfo *ses, SESSION_SETUP_ANDX *pSMB)
38{
39 __u32 capabilities = 0;
40
41 /* init fields common to all four types of SessSetup */
42 /* note that header is initialized to zero in header_assemble */
43 pSMB->req.AndXCommand = 0xFF;
44 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
45 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
46
47 /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
48
Steve French790fe572007-07-07 19:25:05 +000049 /* BB verify whether signing required on neg or just on auth frame
Steve French39798772006-05-31 22:40:51 +000050 (and NTLM case) */
51
52 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
53 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
54
Steve French790fe572007-07-07 19:25:05 +000055 if (ses->server->secMode &
56 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Steve French39798772006-05-31 22:40:51 +000057 pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
58
59 if (ses->capabilities & CAP_UNICODE) {
60 pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE;
61 capabilities |= CAP_UNICODE;
62 }
63 if (ses->capabilities & CAP_STATUS32) {
64 pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS;
65 capabilities |= CAP_STATUS32;
66 }
67 if (ses->capabilities & CAP_DFS) {
68 pSMB->req.hdr.Flags2 |= SMBFLG2_DFS;
69 capabilities |= CAP_DFS;
70 }
Steve French26f57362007-08-30 22:09:15 +000071 if (ses->capabilities & CAP_UNIX)
Steve French39798772006-05-31 22:40:51 +000072 capabilities |= CAP_UNIX;
Steve French39798772006-05-31 22:40:51 +000073
74 /* BB check whether to init vcnum BB */
75 return capabilities;
76}
77
Jeff Layton0d3a01f2007-10-16 17:32:19 +000078static void
79unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp)
80{
81 char *bcc_ptr = *pbcc_area;
82 int bytes_ret = 0;
83
84 /* Copy OS version */
85 bytes_ret = cifs_strtoUCS((__le16 *)bcc_ptr, "Linux version ", 32,
86 nls_cp);
87 bcc_ptr += 2 * bytes_ret;
88 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, init_utsname()->release,
89 32, nls_cp);
90 bcc_ptr += 2 * bytes_ret;
91 bcc_ptr += 2; /* trailing null */
92
93 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
94 32, nls_cp);
95 bcc_ptr += 2 * bytes_ret;
96 bcc_ptr += 2; /* trailing null */
97
98 *pbcc_area = bcc_ptr;
99}
100
101static void unicode_domain_string(char **pbcc_area, struct cifsSesInfo *ses,
102 const struct nls_table *nls_cp)
103{
104 char *bcc_ptr = *pbcc_area;
105 int bytes_ret = 0;
106
107 /* copy domain */
108 if (ses->domainName == NULL) {
109 /* Sending null domain better than using a bogus domain name (as
110 we did briefly in 2.6.18) since server will use its default */
111 *bcc_ptr = 0;
112 *(bcc_ptr+1) = 0;
113 bytes_ret = 0;
114 } else
115 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->domainName,
116 256, nls_cp);
117 bcc_ptr += 2 * bytes_ret;
118 bcc_ptr += 2; /* account for null terminator */
119
120 *pbcc_area = bcc_ptr;
121}
122
123
Steve French38702532007-07-08 15:40:40 +0000124static void unicode_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
Steve French790fe572007-07-07 19:25:05 +0000125 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000126{
Steve French790fe572007-07-07 19:25:05 +0000127 char *bcc_ptr = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000128 int bytes_ret = 0;
129
130 /* BB FIXME add check that strings total less
131 than 335 or will need to send them as arrays */
132
Steve French0223cf02006-06-27 19:50:57 +0000133 /* unicode strings, must be word aligned before the call */
134/* if ((long) bcc_ptr % 2) {
Steve French39798772006-05-31 22:40:51 +0000135 *bcc_ptr = 0;
136 bcc_ptr++;
Steve French0223cf02006-06-27 19:50:57 +0000137 } */
Steve French39798772006-05-31 22:40:51 +0000138 /* copy user */
Steve French790fe572007-07-07 19:25:05 +0000139 if (ses->userName == NULL) {
Steve French6e659c62006-11-08 23:10:46 +0000140 /* null user mount */
141 *bcc_ptr = 0;
142 *(bcc_ptr+1) = 0;
Steve French39798772006-05-31 22:40:51 +0000143 } else { /* 300 should be long enough for any conceivable user name */
144 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName,
145 300, nls_cp);
146 }
147 bcc_ptr += 2 * bytes_ret;
148 bcc_ptr += 2; /* account for null termination */
Steve French39798772006-05-31 22:40:51 +0000149
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000150 unicode_domain_string(&bcc_ptr, ses, nls_cp);
151 unicode_oslm_strings(&bcc_ptr, nls_cp);
Steve French39798772006-05-31 22:40:51 +0000152
153 *pbcc_area = bcc_ptr;
154}
155
Steve French38702532007-07-08 15:40:40 +0000156static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
Steve French790fe572007-07-07 19:25:05 +0000157 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000158{
Steve French790fe572007-07-07 19:25:05 +0000159 char *bcc_ptr = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000160
161 /* copy user */
162 /* BB what about null user mounts - check that we do this BB */
Steve French790fe572007-07-07 19:25:05 +0000163 /* copy user */
164 if (ses->userName == NULL) {
165 /* BB what about null user mounts - check that we do this BB */
166 } else { /* 300 should be long enough for any conceivable user name */
167 strncpy(bcc_ptr, ses->userName, 300);
168 }
Steve French39798772006-05-31 22:40:51 +0000169 /* BB improve check for overflow */
Steve French790fe572007-07-07 19:25:05 +0000170 bcc_ptr += strnlen(ses->userName, 300);
Steve French39798772006-05-31 22:40:51 +0000171 *bcc_ptr = 0;
Steve French790fe572007-07-07 19:25:05 +0000172 bcc_ptr++; /* account for null termination */
Steve French39798772006-05-31 22:40:51 +0000173
Steve French790fe572007-07-07 19:25:05 +0000174 /* copy domain */
175
176 if (ses->domainName != NULL) {
177 strncpy(bcc_ptr, ses->domainName, 256);
Steve French39798772006-05-31 22:40:51 +0000178 bcc_ptr += strnlen(ses->domainName, 256);
Steve French790fe572007-07-07 19:25:05 +0000179 } /* else we will send a null domain name
Steve French6e659c62006-11-08 23:10:46 +0000180 so the server will default to its own domain */
Steve French39798772006-05-31 22:40:51 +0000181 *bcc_ptr = 0;
182 bcc_ptr++;
183
184 /* BB check for overflow here */
185
186 strcpy(bcc_ptr, "Linux version ");
187 bcc_ptr += strlen("Linux version ");
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700188 strcpy(bcc_ptr, init_utsname()->release);
189 bcc_ptr += strlen(init_utsname()->release) + 1;
Steve French39798772006-05-31 22:40:51 +0000190
191 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
192 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
193
Steve French790fe572007-07-07 19:25:05 +0000194 *pbcc_area = bcc_ptr;
Steve French39798772006-05-31 22:40:51 +0000195}
196
Steve French790fe572007-07-07 19:25:05 +0000197static int decode_unicode_ssetup(char **pbcc_area, int bleft,
198 struct cifsSesInfo *ses,
199 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000200{
201 int rc = 0;
202 int words_left, len;
Steve French790fe572007-07-07 19:25:05 +0000203 char *data = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000204
205
206
Steve French790fe572007-07-07 19:25:05 +0000207 cFYI(1, ("bleft %d", bleft));
Steve French39798772006-05-31 22:40:51 +0000208
209
Steve French8e6f1952007-01-22 01:19:30 +0000210 /* SMB header is unaligned, so cifs servers word align start of
211 Unicode strings */
212 data++;
213 bleft--; /* Windows servers do not always double null terminate
214 their final Unicode string - in which case we
215 now will not attempt to decode the byte of junk
216 which follows it */
Steve French50c2f752007-07-13 00:33:32 +0000217
Steve French39798772006-05-31 22:40:51 +0000218 words_left = bleft / 2;
219
220 /* save off server operating system */
221 len = UniStrnlen((wchar_t *) data, words_left);
222
223/* We look for obvious messed up bcc or strings in response so we do not go off
224 the end since (at least) WIN2K and Windows XP have a major bug in not null
225 terminating last Unicode string in response */
Steve French790fe572007-07-07 19:25:05 +0000226 if (len >= words_left)
Steve French39798772006-05-31 22:40:51 +0000227 return rc;
228
Steve French26f57362007-08-30 22:09:15 +0000229 kfree(ses->serverOS);
Steve French39798772006-05-31 22:40:51 +0000230 /* UTF-8 string will not grow more than four times as big as UCS-16 */
231 ses->serverOS = kzalloc(4 * len, GFP_KERNEL);
Steve French26f57362007-08-30 22:09:15 +0000232 if (ses->serverOS != NULL)
233 cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp);
Steve French39798772006-05-31 22:40:51 +0000234 data += 2 * (len + 1);
235 words_left -= len + 1;
236
237 /* save off server network operating system */
238 len = UniStrnlen((wchar_t *) data, words_left);
239
Steve French790fe572007-07-07 19:25:05 +0000240 if (len >= words_left)
Steve French39798772006-05-31 22:40:51 +0000241 return rc;
242
Steve French26f57362007-08-30 22:09:15 +0000243 kfree(ses->serverNOS);
Steve French39798772006-05-31 22:40:51 +0000244 ses->serverNOS = kzalloc(4 * len, GFP_KERNEL); /* BB this is wrong length FIXME BB */
Steve French790fe572007-07-07 19:25:05 +0000245 if (ses->serverNOS != NULL) {
Steve French39798772006-05-31 22:40:51 +0000246 cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len,
247 nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000248 if (strncmp(ses->serverNOS, "NT LAN Manager 4", 16) == 0) {
249 cFYI(1, ("NT4 server"));
Steve French39798772006-05-31 22:40:51 +0000250 ses->flags |= CIFS_SES_NT4;
251 }
252 }
253 data += 2 * (len + 1);
254 words_left -= len + 1;
255
Steve French790fe572007-07-07 19:25:05 +0000256 /* save off server domain */
257 len = UniStrnlen((wchar_t *) data, words_left);
Steve French39798772006-05-31 22:40:51 +0000258
Steve French790fe572007-07-07 19:25:05 +0000259 if (len > words_left)
260 return rc;
Steve French39798772006-05-31 22:40:51 +0000261
Steve French26f57362007-08-30 22:09:15 +0000262 kfree(ses->serverDomain);
Steve French790fe572007-07-07 19:25:05 +0000263 ses->serverDomain = kzalloc(2 * (len + 1), GFP_KERNEL); /* BB FIXME wrong length */
264 if (ses->serverDomain != NULL) {
265 cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len,
266 nls_cp);
267 ses->serverDomain[2*len] = 0;
268 ses->serverDomain[(2*len) + 1] = 0;
269 }
270 data += 2 * (len + 1);
271 words_left -= len + 1;
272
273 cFYI(1, ("words left: %d", words_left));
Steve French39798772006-05-31 22:40:51 +0000274
275 return rc;
276}
277
Steve French790fe572007-07-07 19:25:05 +0000278static int decode_ascii_ssetup(char **pbcc_area, int bleft,
279 struct cifsSesInfo *ses,
280 const struct nls_table *nls_cp)
Steve French39798772006-05-31 22:40:51 +0000281{
282 int rc = 0;
283 int len;
Steve French790fe572007-07-07 19:25:05 +0000284 char *bcc_ptr = *pbcc_area;
Steve French39798772006-05-31 22:40:51 +0000285
Steve French790fe572007-07-07 19:25:05 +0000286 cFYI(1, ("decode sessetup ascii. bleft %d", bleft));
Steve French50c2f752007-07-13 00:33:32 +0000287
Steve French39798772006-05-31 22:40:51 +0000288 len = strnlen(bcc_ptr, bleft);
Steve French790fe572007-07-07 19:25:05 +0000289 if (len >= bleft)
Steve French39798772006-05-31 22:40:51 +0000290 return rc;
Steve French50c2f752007-07-13 00:33:32 +0000291
Steve French26f57362007-08-30 22:09:15 +0000292 kfree(ses->serverOS);
Steve French39798772006-05-31 22:40:51 +0000293
294 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +0000295 if (ses->serverOS)
Steve French39798772006-05-31 22:40:51 +0000296 strncpy(ses->serverOS, bcc_ptr, len);
Steve French790fe572007-07-07 19:25:05 +0000297 if (strncmp(ses->serverOS, "OS/2", 4) == 0) {
298 cFYI(1, ("OS/2 server"));
Steve French9ac00b72006-09-30 04:13:17 +0000299 ses->flags |= CIFS_SES_OS2;
300 }
Steve French39798772006-05-31 22:40:51 +0000301
302 bcc_ptr += len + 1;
303 bleft -= len + 1;
304
305 len = strnlen(bcc_ptr, bleft);
Steve French790fe572007-07-07 19:25:05 +0000306 if (len >= bleft)
Steve French39798772006-05-31 22:40:51 +0000307 return rc;
308
Steve French26f57362007-08-30 22:09:15 +0000309 kfree(ses->serverNOS);
Steve French39798772006-05-31 22:40:51 +0000310
311 ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +0000312 if (ses->serverNOS)
Steve French39798772006-05-31 22:40:51 +0000313 strncpy(ses->serverNOS, bcc_ptr, len);
314
315 bcc_ptr += len + 1;
316 bleft -= len + 1;
317
Steve French790fe572007-07-07 19:25:05 +0000318 len = strnlen(bcc_ptr, bleft);
319 if (len > bleft)
320 return rc;
Steve French39798772006-05-31 22:40:51 +0000321
Steve French9ac00b72006-09-30 04:13:17 +0000322 /* No domain field in LANMAN case. Domain is
323 returned by old servers in the SMB negprot response */
324 /* BB For newer servers which do not support Unicode,
325 but thus do return domain here we could add parsing
326 for it later, but it is not very important */
Steve French790fe572007-07-07 19:25:05 +0000327 cFYI(1, ("ascii: bytes left %d", bleft));
Steve French39798772006-05-31 22:40:51 +0000328
329 return rc;
330}
331
Steve French790fe572007-07-07 19:25:05 +0000332int
Steve French39798772006-05-31 22:40:51 +0000333CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
334 const struct nls_table *nls_cp)
335{
336 int rc = 0;
337 int wct;
Steve French39798772006-05-31 22:40:51 +0000338 struct smb_hdr *smb_buf;
339 char *bcc_ptr;
Steve French750d1152006-06-27 06:28:30 +0000340 char *str_area;
Steve French39798772006-05-31 22:40:51 +0000341 SESSION_SETUP_ANDX *pSMB;
342 __u32 capabilities;
343 int count;
Steve French24424212007-11-16 23:37:35 +0000344 int resp_buf_type;
345 struct kvec iov[3];
Steve French39798772006-05-31 22:40:51 +0000346 enum securityEnum type;
347 __u16 action;
348 int bytes_remaining;
Steve French24424212007-11-16 23:37:35 +0000349 struct key *spnego_key = NULL;
Steve French254e55e2006-06-04 05:53:15 +0000350
Steve French790fe572007-07-07 19:25:05 +0000351 if (ses == NULL)
Steve French39798772006-05-31 22:40:51 +0000352 return -EINVAL;
353
354 type = ses->server->secType;
Steve Frenchf40c5622006-06-28 00:13:38 +0000355
Steve French790fe572007-07-07 19:25:05 +0000356 cFYI(1, ("sess setup type %d", type));
357 if (type == LANMAN) {
Steve French39798772006-05-31 22:40:51 +0000358#ifndef CONFIG_CIFS_WEAK_PW_HASH
359 /* LANMAN and plaintext are less secure and off by default.
360 So we make this explicitly be turned on in kconfig (in the
361 build) and turned on at runtime (changed from the default)
362 in proc/fs/cifs or via mount parm. Unfortunately this is
363 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
364 return -EOPNOTSUPP;
365#endif
366 wct = 10; /* lanman 2 style sessionsetup */
Steve French790fe572007-07-07 19:25:05 +0000367 } else if ((type == NTLM) || (type == NTLMv2)) {
Steve French9312f672006-06-04 22:21:07 +0000368 /* For NTLMv2 failures eventually may need to retry NTLM */
Steve French39798772006-05-31 22:40:51 +0000369 wct = 13; /* old style NTLM sessionsetup */
Steve French790fe572007-07-07 19:25:05 +0000370 } else /* same size: negotiate or auth, NTLMSSP or extended security */
Steve French39798772006-05-31 22:40:51 +0000371 wct = 12;
372
373 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
374 (void **)&smb_buf);
Steve French790fe572007-07-07 19:25:05 +0000375 if (rc)
Steve French39798772006-05-31 22:40:51 +0000376 return rc;
377
378 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
379
380 capabilities = cifs_ssetup_hdr(ses, pSMB);
Steve French750d1152006-06-27 06:28:30 +0000381
Steve French24424212007-11-16 23:37:35 +0000382 /* we will send the SMB in three pieces:
383 a fixed length beginning part, an optional
384 SPNEGO blob (which can be zero length), and a
385 last part which will include the strings
386 and rest of bcc area. This allows us to avoid
387 a large buffer 17K allocation */
Steve French790fe572007-07-07 19:25:05 +0000388 iov[0].iov_base = (char *)pSMB;
389 iov[0].iov_len = smb_buf->smb_buf_length + 4;
Steve French750d1152006-06-27 06:28:30 +0000390
Steve French24424212007-11-16 23:37:35 +0000391 /* setting this here allows the code at the end of the function
392 to free the request buffer if there's an error */
393 resp_buf_type = CIFS_SMALL_BUFFER;
394
Steve French750d1152006-06-27 06:28:30 +0000395 /* 2000 big enough to fit max user, domain, NOS name etc. */
396 str_area = kmalloc(2000, GFP_KERNEL);
Cyrill Gorcunov5e6e6232007-08-18 00:15:20 +0000397 if (str_area == NULL) {
Steve French24424212007-11-16 23:37:35 +0000398 rc = -ENOMEM;
399 goto ssetup_exit;
Cyrill Gorcunov5e6e6232007-08-18 00:15:20 +0000400 }
Steve French750d1152006-06-27 06:28:30 +0000401 bcc_ptr = str_area;
Steve French39798772006-05-31 22:40:51 +0000402
Steve French9ac00b72006-09-30 04:13:17 +0000403 ses->flags &= ~CIFS_SES_LANMAN;
404
Steve French24424212007-11-16 23:37:35 +0000405 iov[1].iov_base = NULL;
406 iov[1].iov_len = 0;
407
Steve French790fe572007-07-07 19:25:05 +0000408 if (type == LANMAN) {
Steve French39798772006-05-31 22:40:51 +0000409#ifdef CONFIG_CIFS_WEAK_PW_HASH
Steve French7c7b25b2006-06-01 19:20:10 +0000410 char lnm_session_key[CIFS_SESS_KEY_SIZE];
Steve French39798772006-05-31 22:40:51 +0000411
412 /* no capabilities flags in old lanman negotiation */
413
Steve French790fe572007-07-07 19:25:05 +0000414 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French39798772006-05-31 22:40:51 +0000415 /* BB calculate hash with password */
416 /* and copy into bcc */
417
Steve French7c7b25b2006-06-01 19:20:10 +0000418 calc_lanman_hash(ses, lnm_session_key);
Steve French790fe572007-07-07 19:25:05 +0000419 ses->flags |= CIFS_SES_LANMAN;
Steve French750d1152006-06-27 06:28:30 +0000420/* #ifdef CONFIG_CIFS_DEBUG2
Steve French39798772006-05-31 22:40:51 +0000421 cifs_dump_mem("cryptkey: ",ses->server->cryptKey,
Steve French7c7b25b2006-06-01 19:20:10 +0000422 CIFS_SESS_KEY_SIZE);
Steve French750d1152006-06-27 06:28:30 +0000423#endif */
Steve French7c7b25b2006-06-01 19:20:10 +0000424 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
425 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French39798772006-05-31 22:40:51 +0000426
427 /* can not sign if LANMAN negotiated so no need
428 to calculate signing key? but what if server
429 changed to do higher than lanman dialect and
430 we reconnected would we ever calc signing_key? */
431
Steve French790fe572007-07-07 19:25:05 +0000432 cFYI(1, ("Negotiating LANMAN setting up strings"));
Steve French39798772006-05-31 22:40:51 +0000433 /* Unicode not allowed for LANMAN dialects */
434 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000435#endif
Steve French39798772006-05-31 22:40:51 +0000436 } else if (type == NTLM) {
Steve French7c7b25b2006-06-01 19:20:10 +0000437 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
Steve French39798772006-05-31 22:40:51 +0000438
439 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
440 pSMB->req_no_secext.CaseInsensitivePasswordLength =
Steve French7c7b25b2006-06-01 19:20:10 +0000441 cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French39798772006-05-31 22:40:51 +0000442 pSMB->req_no_secext.CaseSensitivePasswordLength =
Steve French7c7b25b2006-06-01 19:20:10 +0000443 cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French50c2f752007-07-13 00:33:32 +0000444
Steve French39798772006-05-31 22:40:51 +0000445 /* calculate session key */
446 SMBNTencrypt(ses->password, ses->server->cryptKey,
447 ntlm_session_key);
448
Steve French790fe572007-07-07 19:25:05 +0000449 if (first_time) /* should this be moved into common code
Steve French39798772006-05-31 22:40:51 +0000450 with similar ntlmv2 path? */
Steve Frenchb609f062007-07-09 07:55:14 +0000451 cifs_calculate_mac_key(&ses->server->mac_signing_key,
Steve French39798772006-05-31 22:40:51 +0000452 ntlm_session_key, ses->password);
453 /* copy session key */
454
Steve French790fe572007-07-07 19:25:05 +0000455 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000456 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French790fe572007-07-07 19:25:05 +0000457 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000458 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French790fe572007-07-07 19:25:05 +0000459 if (ses->capabilities & CAP_UNICODE) {
Steve French0223cf02006-06-27 19:50:57 +0000460 /* unicode strings must be word aligned */
461 if (iov[0].iov_len % 2) {
462 *bcc_ptr = 0;
Steve French790fe572007-07-07 19:25:05 +0000463 bcc_ptr++;
464 }
Steve French7c7b25b2006-06-01 19:20:10 +0000465 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French0223cf02006-06-27 19:50:57 +0000466 } else
Steve French7c7b25b2006-06-01 19:20:10 +0000467 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
468 } else if (type == NTLMv2) {
Steve French790fe572007-07-07 19:25:05 +0000469 char *v2_sess_key =
Steve French6d027cf2006-06-05 16:26:05 +0000470 kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
Steve Frenchf64b23a2006-06-05 05:27:37 +0000471
472 /* BB FIXME change all users of v2_sess_key to
473 struct ntlmv2_resp */
Steve French7c7b25b2006-06-01 19:20:10 +0000474
Steve French790fe572007-07-07 19:25:05 +0000475 if (v2_sess_key == NULL) {
Steve French24424212007-11-16 23:37:35 +0000476 rc = -ENOMEM;
477 goto ssetup_exit;
Steve French7c7b25b2006-06-01 19:20:10 +0000478 }
479
480 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
481
482 /* LM2 password would be here if we supported it */
483 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
484 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
485
486 pSMB->req_no_secext.CaseSensitivePasswordLength =
Steve Frenchf64b23a2006-06-05 05:27:37 +0000487 cpu_to_le16(sizeof(struct ntlmv2_resp));
Steve French7c7b25b2006-06-01 19:20:10 +0000488
489 /* calculate session key */
Steve French1717ffc2006-06-08 05:41:32 +0000490 setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000491 if (first_time) /* should this be moved into common code
492 with similar ntlmv2 path? */
Steve French7c7b25b2006-06-01 19:20:10 +0000493 /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key,
494 response BB FIXME, v2_sess_key); */
495
496 /* copy session key */
497
498 /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
499 bcc_ptr += LM2_SESS_KEY_SIZE; */
Steve French38702532007-07-08 15:40:40 +0000500 memcpy(bcc_ptr, (char *)v2_sess_key,
501 sizeof(struct ntlmv2_resp));
Steve Frenchf64b23a2006-06-05 05:27:37 +0000502 bcc_ptr += sizeof(struct ntlmv2_resp);
503 kfree(v2_sess_key);
Steve French790fe572007-07-07 19:25:05 +0000504 if (ses->capabilities & CAP_UNICODE) {
505 if (iov[0].iov_len % 2) {
Steve French0223cf02006-06-27 19:50:57 +0000506 *bcc_ptr = 0;
Steve French26f57362007-08-30 22:09:15 +0000507 bcc_ptr++;
508 }
Steve French39798772006-05-31 22:40:51 +0000509 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French0223cf02006-06-27 19:50:57 +0000510 } else
Steve French39798772006-05-31 22:40:51 +0000511 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French24424212007-11-16 23:37:35 +0000512 } else if (type == Kerberos) {
513#ifdef CONFIG_CIFS_UPCALL
514 struct cifs_spnego_msg *msg;
515 spnego_key = cifs_get_spnego_key(ses);
516 if (IS_ERR(spnego_key)) {
517 rc = PTR_ERR(spnego_key);
518 spnego_key = NULL;
519 goto ssetup_exit;
520 }
521
522 msg = spnego_key->payload.data;
523 /* bail out if key is too long */
524 if (msg->sesskey_len >
525 sizeof(ses->server->mac_signing_key.data.krb5)) {
526 cERROR(1, ("Kerberos signing key too long (%u bytes)",
527 msg->sesskey_len));
528 rc = -EOVERFLOW;
529 goto ssetup_exit;
530 }
Jeff Layton1a675702007-12-31 04:03:02 +0000531 if (first_time) {
532 ses->server->mac_signing_key.len = msg->sesskey_len;
533 memcpy(ses->server->mac_signing_key.data.krb5,
534 msg->data, msg->sesskey_len);
535 }
Steve French39798772006-05-31 22:40:51 +0000536 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
537 capabilities |= CAP_EXTENDED_SECURITY;
538 pSMB->req.Capabilities = cpu_to_le32(capabilities);
Steve French24424212007-11-16 23:37:35 +0000539 iov[1].iov_base = msg->data + msg->sesskey_len;
540 iov[1].iov_len = msg->secblob_len;
541 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
542
543 if (ses->capabilities & CAP_UNICODE) {
544 /* unicode strings must be word aligned */
Jeff Layton28c5a022007-12-31 04:56:21 +0000545 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
Steve French24424212007-11-16 23:37:35 +0000546 *bcc_ptr = 0;
547 bcc_ptr++;
548 }
549 unicode_oslm_strings(&bcc_ptr, nls_cp);
550 unicode_domain_string(&bcc_ptr, ses, nls_cp);
551 } else
552 /* BB: is this right? */
553 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
554#else /* ! CONFIG_CIFS_UPCALL */
555 cERROR(1, ("Kerberos negotiated but upcall support disabled!"));
556 rc = -ENOSYS;
557 goto ssetup_exit;
558#endif /* CONFIG_CIFS_UPCALL */
559 } else {
560 cERROR(1, ("secType %d not supported!", type));
561 rc = -ENOSYS;
562 goto ssetup_exit;
Steve French39798772006-05-31 22:40:51 +0000563 }
564
Steve French24424212007-11-16 23:37:35 +0000565 iov[2].iov_base = str_area;
566 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
567
568 count = iov[1].iov_len + iov[2].iov_len;
Steve French39798772006-05-31 22:40:51 +0000569 smb_buf->smb_buf_length += count;
570
Steve French39798772006-05-31 22:40:51 +0000571 BCC_LE(smb_buf) = cpu_to_le16(count);
572
Steve French24424212007-11-16 23:37:35 +0000573 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
Steve French133672e2007-11-13 22:41:37 +0000574 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
Steve French39798772006-05-31 22:40:51 +0000575 /* SMB request buf freed in SendReceive2 */
576
Steve French790fe572007-07-07 19:25:05 +0000577 cFYI(1, ("ssetup rc from sendrecv2 is %d", rc));
578 if (rc)
Steve French39798772006-05-31 22:40:51 +0000579 goto ssetup_exit;
580
581 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
582 smb_buf = (struct smb_hdr *)iov[0].iov_base;
583
Steve French790fe572007-07-07 19:25:05 +0000584 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
Steve French39798772006-05-31 22:40:51 +0000585 rc = -EIO;
Steve French790fe572007-07-07 19:25:05 +0000586 cERROR(1, ("bad word count %d", smb_buf->WordCount));
Steve French39798772006-05-31 22:40:51 +0000587 goto ssetup_exit;
588 }
589 action = le16_to_cpu(pSMB->resp.Action);
590 if (action & GUEST_LOGIN)
Steve French189acaa2006-06-23 02:33:48 +0000591 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
Steve French39798772006-05-31 22:40:51 +0000592 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
593 cFYI(1, ("UID = %d ", ses->Suid));
594 /* response can have either 3 or 4 word count - Samba sends 3 */
595 /* and lanman response is 3 */
596 bytes_remaining = BCC(smb_buf);
597 bcc_ptr = pByteArea(smb_buf);
598
Steve French790fe572007-07-07 19:25:05 +0000599 if (smb_buf->WordCount == 4) {
Steve French39798772006-05-31 22:40:51 +0000600 __u16 blob_len;
601 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
602 bcc_ptr += blob_len;
Steve French790fe572007-07-07 19:25:05 +0000603 if (blob_len > bytes_remaining) {
604 cERROR(1, ("bad security blob length %d", blob_len));
Steve French39798772006-05-31 22:40:51 +0000605 rc = -EINVAL;
606 goto ssetup_exit;
607 }
608 bytes_remaining -= blob_len;
Steve French790fe572007-07-07 19:25:05 +0000609 }
Steve French39798772006-05-31 22:40:51 +0000610
611 /* BB check if Unicode and decode strings */
Steve French790fe572007-07-07 19:25:05 +0000612 if (smb_buf->Flags2 & SMBFLG2_UNICODE)
Steve French39798772006-05-31 22:40:51 +0000613 rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
614 ses, nls_cp);
615 else
Steve French63135e02007-07-17 17:34:02 +0000616 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
617 ses, nls_cp);
Steve French50c2f752007-07-13 00:33:32 +0000618
Steve French39798772006-05-31 22:40:51 +0000619ssetup_exit:
Steve French24424212007-11-16 23:37:35 +0000620 if (spnego_key)
621 key_put(spnego_key);
Steve French750d1152006-06-27 06:28:30 +0000622 kfree(str_area);
Steve French790fe572007-07-07 19:25:05 +0000623 if (resp_buf_type == CIFS_SMALL_BUFFER) {
624 cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base));
Steve French39798772006-05-31 22:40:51 +0000625 cifs_small_buf_release(iov[0].iov_base);
Steve French790fe572007-07-07 19:25:05 +0000626 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
Steve French39798772006-05-31 22:40:51 +0000627 cifs_buf_release(iov[0].iov_base);
628
629 return rc;
630}