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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 French7c7b25b2006-06-01 19:20:10 +0000420 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
421 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French39798772006-05-31 22:40:51 +0000422
423 /* can not sign if LANMAN negotiated so no need
424 to calculate signing key? but what if server
425 changed to do higher than lanman dialect and
426 we reconnected would we ever calc signing_key? */
427
Steve French790fe572007-07-07 19:25:05 +0000428 cFYI(1, ("Negotiating LANMAN setting up strings"));
Steve French39798772006-05-31 22:40:51 +0000429 /* Unicode not allowed for LANMAN dialects */
430 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000431#endif
Steve French39798772006-05-31 22:40:51 +0000432 } else if (type == NTLM) {
Steve French7c7b25b2006-06-01 19:20:10 +0000433 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
Steve French39798772006-05-31 22:40:51 +0000434
435 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
436 pSMB->req_no_secext.CaseInsensitivePasswordLength =
Steve French7c7b25b2006-06-01 19:20:10 +0000437 cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French39798772006-05-31 22:40:51 +0000438 pSMB->req_no_secext.CaseSensitivePasswordLength =
Steve French7c7b25b2006-06-01 19:20:10 +0000439 cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve French50c2f752007-07-13 00:33:32 +0000440
Steve French39798772006-05-31 22:40:51 +0000441 /* calculate session key */
442 SMBNTencrypt(ses->password, ses->server->cryptKey,
443 ntlm_session_key);
444
Steve French790fe572007-07-07 19:25:05 +0000445 if (first_time) /* should this be moved into common code
Steve French39798772006-05-31 22:40:51 +0000446 with similar ntlmv2 path? */
Steve Frenchb609f062007-07-09 07:55:14 +0000447 cifs_calculate_mac_key(&ses->server->mac_signing_key,
Steve French39798772006-05-31 22:40:51 +0000448 ntlm_session_key, ses->password);
449 /* copy session key */
450
Steve French790fe572007-07-07 19:25:05 +0000451 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000452 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French790fe572007-07-07 19:25:05 +0000453 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
Steve French7c7b25b2006-06-01 19:20:10 +0000454 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve French790fe572007-07-07 19:25:05 +0000455 if (ses->capabilities & CAP_UNICODE) {
Steve French0223cf02006-06-27 19:50:57 +0000456 /* unicode strings must be word aligned */
457 if (iov[0].iov_len % 2) {
458 *bcc_ptr = 0;
Steve French790fe572007-07-07 19:25:05 +0000459 bcc_ptr++;
460 }
Steve French7c7b25b2006-06-01 19:20:10 +0000461 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French0223cf02006-06-27 19:50:57 +0000462 } else
Steve French7c7b25b2006-06-01 19:20:10 +0000463 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
464 } else if (type == NTLMv2) {
Steve French790fe572007-07-07 19:25:05 +0000465 char *v2_sess_key =
Steve French6d027cf2006-06-05 16:26:05 +0000466 kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
Steve Frenchf64b23a2006-06-05 05:27:37 +0000467
468 /* BB FIXME change all users of v2_sess_key to
469 struct ntlmv2_resp */
Steve French7c7b25b2006-06-01 19:20:10 +0000470
Steve French790fe572007-07-07 19:25:05 +0000471 if (v2_sess_key == NULL) {
Steve French24424212007-11-16 23:37:35 +0000472 rc = -ENOMEM;
473 goto ssetup_exit;
Steve French7c7b25b2006-06-01 19:20:10 +0000474 }
475
476 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
477
478 /* LM2 password would be here if we supported it */
479 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
480 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
481
482 pSMB->req_no_secext.CaseSensitivePasswordLength =
Steve Frenchf64b23a2006-06-05 05:27:37 +0000483 cpu_to_le16(sizeof(struct ntlmv2_resp));
Steve French7c7b25b2006-06-01 19:20:10 +0000484
485 /* calculate session key */
Steve French1717ffc2006-06-08 05:41:32 +0000486 setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
Steve French790fe572007-07-07 19:25:05 +0000487 if (first_time) /* should this be moved into common code
488 with similar ntlmv2 path? */
Steve French7c7b25b2006-06-01 19:20:10 +0000489 /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key,
490 response BB FIXME, v2_sess_key); */
491
492 /* copy session key */
493
494 /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
495 bcc_ptr += LM2_SESS_KEY_SIZE; */
Steve French38702532007-07-08 15:40:40 +0000496 memcpy(bcc_ptr, (char *)v2_sess_key,
497 sizeof(struct ntlmv2_resp));
Steve Frenchf64b23a2006-06-05 05:27:37 +0000498 bcc_ptr += sizeof(struct ntlmv2_resp);
499 kfree(v2_sess_key);
Steve French790fe572007-07-07 19:25:05 +0000500 if (ses->capabilities & CAP_UNICODE) {
501 if (iov[0].iov_len % 2) {
Steve French0223cf02006-06-27 19:50:57 +0000502 *bcc_ptr = 0;
Steve French26f57362007-08-30 22:09:15 +0000503 bcc_ptr++;
504 }
Steve French39798772006-05-31 22:40:51 +0000505 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French0223cf02006-06-27 19:50:57 +0000506 } else
Steve French39798772006-05-31 22:40:51 +0000507 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
Steve French24424212007-11-16 23:37:35 +0000508 } else if (type == Kerberos) {
509#ifdef CONFIG_CIFS_UPCALL
510 struct cifs_spnego_msg *msg;
511 spnego_key = cifs_get_spnego_key(ses);
512 if (IS_ERR(spnego_key)) {
513 rc = PTR_ERR(spnego_key);
514 spnego_key = NULL;
515 goto ssetup_exit;
516 }
517
518 msg = spnego_key->payload.data;
519 /* bail out if key is too long */
520 if (msg->sesskey_len >
521 sizeof(ses->server->mac_signing_key.data.krb5)) {
522 cERROR(1, ("Kerberos signing key too long (%u bytes)",
523 msg->sesskey_len));
524 rc = -EOVERFLOW;
525 goto ssetup_exit;
526 }
Jeff Layton1a675702007-12-31 04:03:02 +0000527 if (first_time) {
528 ses->server->mac_signing_key.len = msg->sesskey_len;
529 memcpy(ses->server->mac_signing_key.data.krb5,
530 msg->data, msg->sesskey_len);
531 }
Steve French39798772006-05-31 22:40:51 +0000532 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
533 capabilities |= CAP_EXTENDED_SECURITY;
534 pSMB->req.Capabilities = cpu_to_le32(capabilities);
Steve French24424212007-11-16 23:37:35 +0000535 iov[1].iov_base = msg->data + msg->sesskey_len;
536 iov[1].iov_len = msg->secblob_len;
537 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
538
539 if (ses->capabilities & CAP_UNICODE) {
540 /* unicode strings must be word aligned */
Jeff Layton28c5a022007-12-31 04:56:21 +0000541 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
Steve French24424212007-11-16 23:37:35 +0000542 *bcc_ptr = 0;
543 bcc_ptr++;
544 }
545 unicode_oslm_strings(&bcc_ptr, nls_cp);
546 unicode_domain_string(&bcc_ptr, ses, nls_cp);
547 } else
548 /* BB: is this right? */
549 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
550#else /* ! CONFIG_CIFS_UPCALL */
551 cERROR(1, ("Kerberos negotiated but upcall support disabled!"));
552 rc = -ENOSYS;
553 goto ssetup_exit;
554#endif /* CONFIG_CIFS_UPCALL */
555 } else {
556 cERROR(1, ("secType %d not supported!", type));
557 rc = -ENOSYS;
558 goto ssetup_exit;
Steve French39798772006-05-31 22:40:51 +0000559 }
560
Steve French24424212007-11-16 23:37:35 +0000561 iov[2].iov_base = str_area;
562 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
563
564 count = iov[1].iov_len + iov[2].iov_len;
Steve French39798772006-05-31 22:40:51 +0000565 smb_buf->smb_buf_length += count;
566
Steve French39798772006-05-31 22:40:51 +0000567 BCC_LE(smb_buf) = cpu_to_le16(count);
568
Steve French24424212007-11-16 23:37:35 +0000569 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
Steve French133672e2007-11-13 22:41:37 +0000570 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
Steve French39798772006-05-31 22:40:51 +0000571 /* SMB request buf freed in SendReceive2 */
572
Steve French790fe572007-07-07 19:25:05 +0000573 cFYI(1, ("ssetup rc from sendrecv2 is %d", rc));
574 if (rc)
Steve French39798772006-05-31 22:40:51 +0000575 goto ssetup_exit;
576
577 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
578 smb_buf = (struct smb_hdr *)iov[0].iov_base;
579
Steve French790fe572007-07-07 19:25:05 +0000580 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
Steve French39798772006-05-31 22:40:51 +0000581 rc = -EIO;
Steve French790fe572007-07-07 19:25:05 +0000582 cERROR(1, ("bad word count %d", smb_buf->WordCount));
Steve French39798772006-05-31 22:40:51 +0000583 goto ssetup_exit;
584 }
585 action = le16_to_cpu(pSMB->resp.Action);
586 if (action & GUEST_LOGIN)
Steve French189acaa2006-06-23 02:33:48 +0000587 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
Steve French39798772006-05-31 22:40:51 +0000588 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
589 cFYI(1, ("UID = %d ", ses->Suid));
590 /* response can have either 3 or 4 word count - Samba sends 3 */
591 /* and lanman response is 3 */
592 bytes_remaining = BCC(smb_buf);
593 bcc_ptr = pByteArea(smb_buf);
594
Steve French790fe572007-07-07 19:25:05 +0000595 if (smb_buf->WordCount == 4) {
Steve French39798772006-05-31 22:40:51 +0000596 __u16 blob_len;
597 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
598 bcc_ptr += blob_len;
Steve French790fe572007-07-07 19:25:05 +0000599 if (blob_len > bytes_remaining) {
600 cERROR(1, ("bad security blob length %d", blob_len));
Steve French39798772006-05-31 22:40:51 +0000601 rc = -EINVAL;
602 goto ssetup_exit;
603 }
604 bytes_remaining -= blob_len;
Steve French790fe572007-07-07 19:25:05 +0000605 }
Steve French39798772006-05-31 22:40:51 +0000606
607 /* BB check if Unicode and decode strings */
Steve French790fe572007-07-07 19:25:05 +0000608 if (smb_buf->Flags2 & SMBFLG2_UNICODE)
Steve French39798772006-05-31 22:40:51 +0000609 rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
610 ses, nls_cp);
611 else
Steve French63135e02007-07-17 17:34:02 +0000612 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
613 ses, nls_cp);
Steve French50c2f752007-07-13 00:33:32 +0000614
Steve French39798772006-05-31 22:40:51 +0000615ssetup_exit:
Steve French24424212007-11-16 23:37:35 +0000616 if (spnego_key)
617 key_put(spnego_key);
Steve French750d1152006-06-27 06:28:30 +0000618 kfree(str_area);
Steve French790fe572007-07-07 19:25:05 +0000619 if (resp_buf_type == CIFS_SMALL_BUFFER) {
620 cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base));
Steve French39798772006-05-31 22:40:51 +0000621 cifs_small_buf_release(iov[0].iov_base);
Steve French790fe572007-07-07 19:25:05 +0000622 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
Steve French39798772006-05-31 22:40:51 +0000623 cifs_buf_release(iov[0].iov_base);
624
625 return rc;
626}