Commit | Line | Data |
---|---|---|
3979877e SF |
1 | /* |
2 | * fs/cifs/sess.c | |
3 | * | |
4 | * SMB/CIFS session setup handling routines | |
5 | * | |
d185cda7 | 6 | * Copyright (c) International Business Machines Corp., 2006, 2009 |
3979877e SF |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include "cifspdu.h" | |
25 | #include "cifsglob.h" | |
26 | #include "cifsproto.h" | |
27 | #include "cifs_unicode.h" | |
28 | #include "cifs_debug.h" | |
29 | #include "ntlmssp.h" | |
30 | #include "nterr.h" | |
9c53588e | 31 | #include <linux/utsname.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
2442421b | 33 | #include "cifs_spnego.h" |
3979877e | 34 | |
96daf2b0 | 35 | static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB) |
3979877e SF |
36 | { |
37 | __u32 capabilities = 0; | |
38 | ||
39 | /* init fields common to all four types of SessSetup */ | |
eca6acf9 SF |
40 | /* Note that offsets for first seven fields in req struct are same */ |
41 | /* in CIFS Specs so does not matter which of 3 forms of struct */ | |
42 | /* that we use in next few lines */ | |
43 | /* Note that header is initialized to zero in header_assemble */ | |
3979877e | 44 | pSMB->req.AndXCommand = 0xFF; |
c974befa JL |
45 | pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32, |
46 | CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4, | |
47 | USHRT_MAX)); | |
3979877e | 48 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); |
bc09d141 | 49 | pSMB->req.VcNumber = cpu_to_le16(1); |
3979877e SF |
50 | |
51 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
52 | ||
790fe579 | 53 | /* BB verify whether signing required on neg or just on auth frame |
3979877e SF |
54 | (and NTLM case) */ |
55 | ||
56 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
57 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
58 | ||
38d77c50 | 59 | if (ses->server->sign) |
3979877e SF |
60 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
61 | ||
62 | if (ses->capabilities & CAP_UNICODE) { | |
63 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
64 | capabilities |= CAP_UNICODE; | |
65 | } | |
66 | if (ses->capabilities & CAP_STATUS32) { | |
67 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
68 | capabilities |= CAP_STATUS32; | |
69 | } | |
70 | if (ses->capabilities & CAP_DFS) { | |
71 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
72 | capabilities |= CAP_DFS; | |
73 | } | |
26f57364 | 74 | if (ses->capabilities & CAP_UNIX) |
3979877e | 75 | capabilities |= CAP_UNIX; |
3979877e | 76 | |
3979877e SF |
77 | return capabilities; |
78 | } | |
79 | ||
0d3a01fa JL |
80 | static void |
81 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
82 | { | |
83 | char *bcc_ptr = *pbcc_area; | |
84 | int bytes_ret = 0; | |
85 | ||
86 | /* Copy OS version */ | |
acbbb76a SF |
87 | bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32, |
88 | nls_cp); | |
0d3a01fa | 89 | bcc_ptr += 2 * bytes_ret; |
acbbb76a SF |
90 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release, |
91 | 32, nls_cp); | |
0d3a01fa JL |
92 | bcc_ptr += 2 * bytes_ret; |
93 | bcc_ptr += 2; /* trailing null */ | |
94 | ||
acbbb76a SF |
95 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, |
96 | 32, nls_cp); | |
0d3a01fa JL |
97 | bcc_ptr += 2 * bytes_ret; |
98 | bcc_ptr += 2; /* trailing null */ | |
99 | ||
100 | *pbcc_area = bcc_ptr; | |
101 | } | |
102 | ||
96daf2b0 | 103 | static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses, |
0d3a01fa JL |
104 | const struct nls_table *nls_cp) |
105 | { | |
106 | char *bcc_ptr = *pbcc_area; | |
107 | int bytes_ret = 0; | |
108 | ||
109 | /* copy domain */ | |
110 | if (ses->domainName == NULL) { | |
111 | /* Sending null domain better than using a bogus domain name (as | |
112 | we did briefly in 2.6.18) since server will use its default */ | |
113 | *bcc_ptr = 0; | |
114 | *(bcc_ptr+1) = 0; | |
115 | bytes_ret = 0; | |
116 | } else | |
acbbb76a | 117 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName, |
057d6332 | 118 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0d3a01fa JL |
119 | bcc_ptr += 2 * bytes_ret; |
120 | bcc_ptr += 2; /* account for null terminator */ | |
121 | ||
122 | *pbcc_area = bcc_ptr; | |
123 | } | |
124 | ||
125 | ||
96daf2b0 | 126 | static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 127 | const struct nls_table *nls_cp) |
3979877e | 128 | { |
790fe579 | 129 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
130 | int bytes_ret = 0; |
131 | ||
132 | /* BB FIXME add check that strings total less | |
133 | than 335 or will need to send them as arrays */ | |
134 | ||
0223cf0b SF |
135 | /* unicode strings, must be word aligned before the call */ |
136 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
137 | *bcc_ptr = 0; |
138 | bcc_ptr++; | |
0223cf0b | 139 | } */ |
3979877e | 140 | /* copy user */ |
8727c8a8 | 141 | if (ses->user_name == NULL) { |
6e659c63 SF |
142 | /* null user mount */ |
143 | *bcc_ptr = 0; | |
144 | *(bcc_ptr+1) = 0; | |
301a6a31 | 145 | } else { |
acbbb76a | 146 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name, |
8c3a2b4c | 147 | CIFS_MAX_USERNAME_LEN, nls_cp); |
3979877e SF |
148 | } |
149 | bcc_ptr += 2 * bytes_ret; | |
150 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 151 | |
0d3a01fa JL |
152 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
153 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
154 | |
155 | *pbcc_area = bcc_ptr; | |
156 | } | |
157 | ||
96daf2b0 | 158 | static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 159 | const struct nls_table *nls_cp) |
3979877e | 160 | { |
790fe579 | 161 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
162 | |
163 | /* copy user */ | |
164 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 | 165 | /* copy user */ |
de47a417 | 166 | if (ses->user_name != NULL) { |
8c3a2b4c SL |
167 | strncpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); |
168 | bcc_ptr += strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); | |
de47a417 | 169 | } |
8727c8a8 | 170 | /* else null user mount */ |
3979877e | 171 | *bcc_ptr = 0; |
790fe579 | 172 | bcc_ptr++; /* account for null termination */ |
3979877e | 173 | |
790fe579 | 174 | /* copy domain */ |
790fe579 | 175 | if (ses->domainName != NULL) { |
057d6332 CG |
176 | strncpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); |
177 | bcc_ptr += strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); | |
790fe579 | 178 | } /* else we will send a null domain name |
6e659c63 | 179 | so the server will default to its own domain */ |
3979877e SF |
180 | *bcc_ptr = 0; |
181 | bcc_ptr++; | |
182 | ||
183 | /* BB check for overflow here */ | |
184 | ||
185 | strcpy(bcc_ptr, "Linux version "); | |
186 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
187 | strcpy(bcc_ptr, init_utsname()->release); |
188 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
189 | |
190 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
191 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
192 | ||
790fe579 | 193 | *pbcc_area = bcc_ptr; |
3979877e SF |
194 | } |
195 | ||
59140797 | 196 | static void |
96daf2b0 | 197 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses, |
59140797 | 198 | const struct nls_table *nls_cp) |
3979877e | 199 | { |
59140797 | 200 | int len; |
790fe579 | 201 | char *data = *pbcc_area; |
3979877e | 202 | |
f96637be | 203 | cifs_dbg(FYI, "bleft %d\n", bleft); |
3979877e | 204 | |
26f57364 | 205 | kfree(ses->serverOS); |
acbbb76a | 206 | ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 207 | cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS); |
59140797 JL |
208 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
209 | data += len; | |
210 | bleft -= len; | |
211 | if (bleft <= 0) | |
212 | return; | |
3979877e | 213 | |
26f57364 | 214 | kfree(ses->serverNOS); |
acbbb76a | 215 | ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 216 | cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS); |
59140797 JL |
217 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
218 | data += len; | |
219 | bleft -= len; | |
220 | if (bleft <= 0) | |
221 | return; | |
790fe579 | 222 | |
26f57364 | 223 | kfree(ses->serverDomain); |
acbbb76a | 224 | ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 225 | cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain); |
790fe579 | 226 | |
59140797 | 227 | return; |
3979877e SF |
228 | } |
229 | ||
7d066459 JL |
230 | static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, |
231 | struct cifs_ses *ses, | |
232 | const struct nls_table *nls_cp) | |
3979877e | 233 | { |
3979877e | 234 | int len; |
790fe579 | 235 | char *bcc_ptr = *pbcc_area; |
3979877e | 236 | |
f96637be | 237 | cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft); |
50c2f753 | 238 | |
3979877e | 239 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 240 | if (len >= bleft) |
7d066459 | 241 | return; |
50c2f753 | 242 | |
26f57364 | 243 | kfree(ses->serverOS); |
3979877e SF |
244 | |
245 | ses->serverOS = kzalloc(len + 1, GFP_KERNEL); | |
27b7edcf | 246 | if (ses->serverOS) { |
3979877e | 247 | strncpy(ses->serverOS, bcc_ptr, len); |
27b7edcf NJ |
248 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) |
249 | cifs_dbg(FYI, "OS/2 server\n"); | |
250 | } | |
3979877e SF |
251 | |
252 | bcc_ptr += len + 1; | |
253 | bleft -= len + 1; | |
254 | ||
255 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 256 | if (len >= bleft) |
7d066459 | 257 | return; |
3979877e | 258 | |
26f57364 | 259 | kfree(ses->serverNOS); |
3979877e SF |
260 | |
261 | ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); | |
790fe579 | 262 | if (ses->serverNOS) |
3979877e SF |
263 | strncpy(ses->serverNOS, bcc_ptr, len); |
264 | ||
265 | bcc_ptr += len + 1; | |
266 | bleft -= len + 1; | |
267 | ||
790fe579 SF |
268 | len = strnlen(bcc_ptr, bleft); |
269 | if (len > bleft) | |
7d066459 | 270 | return; |
3979877e | 271 | |
9ac00b7d SF |
272 | /* No domain field in LANMAN case. Domain is |
273 | returned by old servers in the SMB negprot response */ | |
274 | /* BB For newer servers which do not support Unicode, | |
275 | but thus do return domain here we could add parsing | |
276 | for it later, but it is not very important */ | |
f96637be | 277 | cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); |
3979877e SF |
278 | } |
279 | ||
5478f9ba | 280 | int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
96daf2b0 | 281 | struct cifs_ses *ses) |
0b3cc858 | 282 | { |
2b149f11 SP |
283 | unsigned int tioffset; /* challenge message target info area */ |
284 | unsigned int tilen; /* challenge message target info area length */ | |
285 | ||
0b3cc858 SF |
286 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; |
287 | ||
288 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
f96637be | 289 | cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len); |
0b3cc858 SF |
290 | return -EINVAL; |
291 | } | |
292 | ||
293 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
f96637be JP |
294 | cifs_dbg(VFS, "blob signature incorrect %s\n", |
295 | pblob->Signature); | |
0b3cc858 SF |
296 | return -EINVAL; |
297 | } | |
298 | if (pblob->MessageType != NtLmChallenge) { | |
f96637be JP |
299 | cifs_dbg(VFS, "Incorrect message type %d\n", |
300 | pblob->MessageType); | |
0b3cc858 SF |
301 | return -EINVAL; |
302 | } | |
303 | ||
d3686d54 | 304 | memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
0b3cc858 SF |
305 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ |
306 | /* In particular we can examine sign flags */ | |
307 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
308 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
d3686d54 | 309 | ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); |
5443d130 SF |
310 | tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset); |
311 | tilen = le16_to_cpu(pblob->TargetInfoArray.Length); | |
4991a5fa | 312 | if (tioffset > blob_len || tioffset + tilen > blob_len) { |
f96637be JP |
313 | cifs_dbg(VFS, "tioffset + tilen too high %u + %u", |
314 | tioffset, tilen); | |
4991a5fa DC |
315 | return -EINVAL; |
316 | } | |
d3686d54 | 317 | if (tilen) { |
f7f7c185 SMP |
318 | ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen, |
319 | GFP_KERNEL); | |
d3686d54 | 320 | if (!ses->auth_key.response) { |
f96637be | 321 | cifs_dbg(VFS, "Challenge target info alloc failure"); |
2b149f11 SP |
322 | return -ENOMEM; |
323 | } | |
d3686d54 | 324 | ses->auth_key.len = tilen; |
2b149f11 SP |
325 | } |
326 | ||
0b3cc858 SF |
327 | return 0; |
328 | } | |
329 | ||
0b3cc858 SF |
330 | /* BB Move to ntlmssp.c eventually */ |
331 | ||
332 | /* We do not malloc the blob, it is passed in pbuffer, because | |
333 | it is fixed size, and small, making this approach cleaner */ | |
5478f9ba | 334 | void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, |
96daf2b0 | 335 | struct cifs_ses *ses) |
0b3cc858 SF |
336 | { |
337 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; | |
338 | __u32 flags; | |
339 | ||
df8fbc24 | 340 | memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); |
0b3cc858 SF |
341 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
342 | sec_blob->MessageType = NtLmNegotiate; | |
343 | ||
344 | /* BB is NTLMV2 session security format easier to use here? */ | |
345 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
346 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
347 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
348 | NTLMSSP_NEGOTIATE_SEAL; | |
349 | if (ses->server->sign) | |
745e507a | 350 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
351 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
352 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 353 | |
df8fbc24 | 354 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
355 | |
356 | sec_blob->WorkstationName.BufferOffset = 0; | |
357 | sec_blob->WorkstationName.Length = 0; | |
358 | sec_blob->WorkstationName.MaximumLength = 0; | |
359 | ||
360 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
361 | sec_blob->DomainName.BufferOffset = 0; | |
362 | sec_blob->DomainName.Length = 0; | |
363 | sec_blob->DomainName.MaximumLength = 0; | |
364 | } | |
365 | ||
b8da344b JM |
366 | static int size_of_ntlmssp_blob(struct cifs_ses *ses) |
367 | { | |
368 | int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len | |
369 | - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2; | |
370 | ||
371 | if (ses->domainName) | |
372 | sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); | |
373 | else | |
374 | sz += 2; | |
375 | ||
376 | if (ses->user_name) | |
377 | sz += 2 * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); | |
378 | else | |
379 | sz += 2; | |
380 | ||
381 | return sz; | |
382 | } | |
383 | ||
384 | int build_ntlmssp_auth_blob(unsigned char **pbuffer, | |
89f150f4 | 385 | u16 *buflen, |
96daf2b0 | 386 | struct cifs_ses *ses, |
2b149f11 | 387 | const struct nls_table *nls_cp) |
0b3cc858 | 388 | { |
2b149f11 | 389 | int rc; |
b8da344b | 390 | AUTHENTICATE_MESSAGE *sec_blob; |
0b3cc858 SF |
391 | __u32 flags; |
392 | unsigned char *tmp; | |
0b3cc858 | 393 | |
b8da344b JM |
394 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
395 | if (rc) { | |
396 | cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc); | |
397 | *buflen = 0; | |
398 | goto setup_ntlmv2_ret; | |
399 | } | |
400 | *pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL); | |
126c97f4 NMG |
401 | if (!*pbuffer) { |
402 | rc = -ENOMEM; | |
403 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
404 | *buflen = 0; | |
405 | goto setup_ntlmv2_ret; | |
406 | } | |
b8da344b JM |
407 | sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer; |
408 | ||
0b3cc858 SF |
409 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
410 | sec_blob->MessageType = NtLmAuthenticate; | |
411 | ||
412 | flags = NTLMSSP_NEGOTIATE_56 | | |
413 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
414 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
415 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
416 | NTLMSSP_NEGOTIATE_SEAL; | |
417 | if (ses->server->sign) | |
0b3cc858 | 418 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
419 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
420 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 421 | |
b8da344b | 422 | tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); |
df8fbc24 | 423 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
424 | |
425 | sec_blob->LmChallengeResponse.BufferOffset = | |
426 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
427 | sec_blob->LmChallengeResponse.Length = 0; | |
428 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
429 | ||
b8da344b JM |
430 | sec_blob->NtChallengeResponse.BufferOffset = |
431 | cpu_to_le32(tmp - *pbuffer); | |
cfda35d9 | 432 | if (ses->user_name != NULL) { |
cfda35d9 SM |
433 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
434 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
435 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
436 | ||
437 | sec_blob->NtChallengeResponse.Length = | |
438 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
439 | sec_blob->NtChallengeResponse.MaximumLength = | |
440 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
441 | } else { | |
442 | /* | |
443 | * don't send an NT Response for anonymous access | |
444 | */ | |
445 | sec_blob->NtChallengeResponse.Length = 0; | |
446 | sec_blob->NtChallengeResponse.MaximumLength = 0; | |
2b149f11 | 447 | } |
0b3cc858 SF |
448 | |
449 | if (ses->domainName == NULL) { | |
b8da344b | 450 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
451 | sec_blob->DomainName.Length = 0; |
452 | sec_blob->DomainName.MaximumLength = 0; | |
453 | tmp += 2; | |
454 | } else { | |
455 | int len; | |
acbbb76a | 456 | len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName, |
202d772b | 457 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0b3cc858 | 458 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 459 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
460 | sec_blob->DomainName.Length = cpu_to_le16(len); |
461 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
462 | tmp += len; | |
463 | } | |
464 | ||
8727c8a8 | 465 | if (ses->user_name == NULL) { |
b8da344b | 466 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
467 | sec_blob->UserName.Length = 0; |
468 | sec_blob->UserName.MaximumLength = 0; | |
469 | tmp += 2; | |
470 | } else { | |
471 | int len; | |
acbbb76a | 472 | len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name, |
8c3a2b4c | 473 | CIFS_MAX_USERNAME_LEN, nls_cp); |
0b3cc858 | 474 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 475 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
476 | sec_blob->UserName.Length = cpu_to_le16(len); |
477 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
478 | tmp += len; | |
479 | } | |
480 | ||
b8da344b | 481 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
482 | sec_blob->WorkstationName.Length = 0; |
483 | sec_blob->WorkstationName.MaximumLength = 0; | |
484 | tmp += 2; | |
485 | ||
df8fbc24 SP |
486 | if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || |
487 | (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) | |
488 | && !calc_seckey(ses)) { | |
d3686d54 | 489 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
b8da344b | 490 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
491 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); |
492 | sec_blob->SessionKey.MaximumLength = | |
493 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
494 | tmp += CIFS_CPHTXT_SIZE; | |
495 | } else { | |
b8da344b | 496 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
497 | sec_blob->SessionKey.Length = 0; |
498 | sec_blob->SessionKey.MaximumLength = 0; | |
499 | } | |
2b149f11 | 500 | |
b8da344b | 501 | *buflen = tmp - *pbuffer; |
2b149f11 | 502 | setup_ntlmv2_ret: |
89f150f4 | 503 | return rc; |
0b3cc858 | 504 | } |
0b3cc858 | 505 | |
3f618223 | 506 | enum securityEnum |
ef65aaed | 507 | cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
3f618223 JL |
508 | { |
509 | switch (server->negflavor) { | |
510 | case CIFS_NEGFLAVOR_EXTENDED: | |
511 | switch (requested) { | |
512 | case Kerberos: | |
513 | case RawNTLMSSP: | |
514 | return requested; | |
515 | case Unspecified: | |
516 | if (server->sec_ntlmssp && | |
517 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
518 | return RawNTLMSSP; | |
519 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
520 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
521 | return Kerberos; | |
522 | /* Fallthrough */ | |
523 | default: | |
524 | return Unspecified; | |
525 | } | |
526 | case CIFS_NEGFLAVOR_UNENCAP: | |
527 | switch (requested) { | |
528 | case NTLM: | |
529 | case NTLMv2: | |
530 | return requested; | |
531 | case Unspecified: | |
532 | if (global_secflags & CIFSSEC_MAY_NTLMV2) | |
533 | return NTLMv2; | |
534 | if (global_secflags & CIFSSEC_MAY_NTLM) | |
535 | return NTLM; | |
3f618223 | 536 | default: |
dde2356c SP |
537 | /* Fallthrough to attempt LANMAN authentication next */ |
538 | break; | |
3f618223 JL |
539 | } |
540 | case CIFS_NEGFLAVOR_LANMAN: | |
541 | switch (requested) { | |
542 | case LANMAN: | |
543 | return requested; | |
544 | case Unspecified: | |
545 | if (global_secflags & CIFSSEC_MAY_LANMAN) | |
546 | return LANMAN; | |
547 | /* Fallthrough */ | |
548 | default: | |
549 | return Unspecified; | |
550 | } | |
551 | default: | |
552 | return Unspecified; | |
553 | } | |
554 | } | |
555 | ||
80a0e637 SP |
556 | struct sess_data { |
557 | unsigned int xid; | |
558 | struct cifs_ses *ses; | |
559 | struct nls_table *nls_cp; | |
560 | void (*func)(struct sess_data *); | |
561 | int result; | |
562 | ||
563 | /* we will send the SMB in three pieces: | |
564 | * a fixed length beginning part, an optional | |
565 | * SPNEGO blob (which can be zero length), and a | |
566 | * last part which will include the strings | |
567 | * and rest of bcc area. This allows us to avoid | |
568 | * a large buffer 17K allocation | |
569 | */ | |
570 | int buf0_type; | |
571 | struct kvec iov[3]; | |
572 | }; | |
573 | ||
574 | static int | |
575 | sess_alloc_buffer(struct sess_data *sess_data, int wct) | |
576 | { | |
577 | int rc; | |
578 | struct cifs_ses *ses = sess_data->ses; | |
579 | struct smb_hdr *smb_buf; | |
580 | ||
581 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
582 | (void **)&smb_buf); | |
583 | ||
584 | if (rc) | |
585 | return rc; | |
586 | ||
587 | sess_data->iov[0].iov_base = (char *)smb_buf; | |
588 | sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; | |
589 | /* | |
590 | * This variable will be used to clear the buffer | |
591 | * allocated above in case of any error in the calling function. | |
592 | */ | |
593 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
594 | ||
595 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
596 | sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL); | |
597 | if (!sess_data->iov[2].iov_base) { | |
598 | rc = -ENOMEM; | |
599 | goto out_free_smb_buf; | |
600 | } | |
601 | ||
602 | return 0; | |
603 | ||
604 | out_free_smb_buf: | |
605 | kfree(smb_buf); | |
606 | sess_data->iov[0].iov_base = NULL; | |
607 | sess_data->iov[0].iov_len = 0; | |
608 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
609 | return rc; | |
610 | } | |
611 | ||
612 | static void | |
613 | sess_free_buffer(struct sess_data *sess_data) | |
614 | { | |
615 | ||
616 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
617 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
618 | kfree(sess_data->iov[2].iov_base); | |
619 | } | |
620 | ||
621 | static int | |
622 | sess_establish_session(struct sess_data *sess_data) | |
623 | { | |
624 | struct cifs_ses *ses = sess_data->ses; | |
625 | ||
626 | mutex_lock(&ses->server->srv_mutex); | |
627 | if (!ses->server->session_estab) { | |
628 | if (ses->server->sign) { | |
629 | ses->server->session_key.response = | |
630 | kmemdup(ses->auth_key.response, | |
631 | ses->auth_key.len, GFP_KERNEL); | |
632 | if (!ses->server->session_key.response) { | |
633 | mutex_unlock(&ses->server->srv_mutex); | |
634 | return -ENOMEM; | |
635 | } | |
636 | ses->server->session_key.len = | |
637 | ses->auth_key.len; | |
638 | } | |
639 | ses->server->sequence_number = 0x2; | |
640 | ses->server->session_estab = true; | |
641 | } | |
642 | mutex_unlock(&ses->server->srv_mutex); | |
643 | ||
644 | cifs_dbg(FYI, "CIFS session established successfully\n"); | |
645 | spin_lock(&GlobalMid_Lock); | |
646 | ses->status = CifsGood; | |
647 | ses->need_reconnect = false; | |
648 | spin_unlock(&GlobalMid_Lock); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
653 | static int | |
654 | sess_sendreceive(struct sess_data *sess_data) | |
655 | { | |
656 | int rc; | |
657 | struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base; | |
658 | __u16 count; | |
da502f7d | 659 | struct kvec rsp_iov = { NULL, 0 }; |
80a0e637 SP |
660 | |
661 | count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len; | |
662 | smb_buf->smb_buf_length = | |
663 | cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count); | |
664 | put_bcc(count, smb_buf); | |
665 | ||
666 | rc = SendReceive2(sess_data->xid, sess_data->ses, | |
667 | sess_data->iov, 3 /* num_iovecs */, | |
668 | &sess_data->buf0_type, | |
da502f7d PS |
669 | CIFS_LOG_ERROR, &rsp_iov); |
670 | cifs_small_buf_release(sess_data->iov[0].iov_base); | |
671 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
80a0e637 SP |
672 | |
673 | return rc; | |
674 | } | |
675 | ||
676 | /* | |
677 | * LANMAN and plaintext are less secure and off by default. | |
678 | * So we make this explicitly be turned on in kconfig (in the | |
679 | * build) and turned on at runtime (changed from the default) | |
680 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
681 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 | |
682 | */ | |
683 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
684 | static void | |
685 | sess_auth_lanman(struct sess_data *sess_data) | |
686 | { | |
687 | int rc = 0; | |
688 | struct smb_hdr *smb_buf; | |
689 | SESSION_SETUP_ANDX *pSMB; | |
690 | char *bcc_ptr; | |
691 | struct cifs_ses *ses = sess_data->ses; | |
692 | char lnm_session_key[CIFS_AUTH_RESP_SIZE]; | |
693 | __u32 capabilities; | |
694 | __u16 bytes_remaining; | |
695 | ||
696 | /* lanman 2 style sessionsetup */ | |
697 | /* wct = 10 */ | |
698 | rc = sess_alloc_buffer(sess_data, 10); | |
699 | if (rc) | |
700 | goto out; | |
701 | ||
702 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
703 | bcc_ptr = sess_data->iov[2].iov_base; | |
704 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
705 | ||
706 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; | |
707 | ||
fa8f3a35 SM |
708 | if (ses->user_name != NULL) { |
709 | /* no capabilities flags in old lanman negotiation */ | |
710 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
80a0e637 | 711 | |
fa8f3a35 SM |
712 | /* Calculate hash with password and copy into bcc_ptr. |
713 | * Encryption Key (stored as in cryptkey) gets used if the | |
714 | * security mode bit in Negottiate Protocol response states | |
715 | * to use challenge/response method (i.e. Password bit is 1). | |
716 | */ | |
717 | rc = calc_lanman_hash(ses->password, ses->server->cryptkey, | |
718 | ses->server->sec_mode & SECMODE_PW_ENCRYPT ? | |
719 | true : false, lnm_session_key); | |
a6b6befb LB |
720 | if (rc) |
721 | goto out; | |
80a0e637 | 722 | |
fa8f3a35 SM |
723 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); |
724 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
725 | } else { | |
726 | pSMB->old_req.PasswordLength = 0; | |
727 | } | |
80a0e637 SP |
728 | |
729 | /* | |
730 | * can not sign if LANMAN negotiated so no need | |
731 | * to calculate signing key? but what if server | |
732 | * changed to do higher than lanman dialect and | |
733 | * we reconnected would we ever calc signing_key? | |
734 | */ | |
735 | ||
736 | cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n"); | |
737 | /* Unicode not allowed for LANMAN dialects */ | |
738 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
739 | ||
740 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
741 | (long) sess_data->iov[2].iov_base; | |
742 | ||
743 | rc = sess_sendreceive(sess_data); | |
744 | if (rc) | |
745 | goto out; | |
746 | ||
747 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
748 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
749 | ||
750 | /* lanman response has a word count of 3 */ | |
751 | if (smb_buf->WordCount != 3) { | |
752 | rc = -EIO; | |
753 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
754 | goto out; | |
755 | } | |
756 | ||
757 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
758 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
759 | ||
760 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
761 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
762 | ||
763 | bytes_remaining = get_bcc(smb_buf); | |
764 | bcc_ptr = pByteArea(smb_buf); | |
765 | ||
766 | /* BB check if Unicode and decode strings */ | |
767 | if (bytes_remaining == 0) { | |
768 | /* no string area to decode, do nothing */ | |
769 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
770 | /* unicode string area must be word-aligned */ | |
771 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
772 | ++bcc_ptr; | |
773 | --bytes_remaining; | |
774 | } | |
775 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
776 | sess_data->nls_cp); | |
777 | } else { | |
778 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
779 | sess_data->nls_cp); | |
780 | } | |
781 | ||
782 | rc = sess_establish_session(sess_data); | |
783 | out: | |
784 | sess_data->result = rc; | |
785 | sess_data->func = NULL; | |
786 | sess_free_buffer(sess_data); | |
787 | } | |
788 | ||
80a0e637 SP |
789 | #endif |
790 | ||
583cf7af SP |
791 | static void |
792 | sess_auth_ntlm(struct sess_data *sess_data) | |
793 | { | |
794 | int rc = 0; | |
795 | struct smb_hdr *smb_buf; | |
796 | SESSION_SETUP_ANDX *pSMB; | |
797 | char *bcc_ptr; | |
798 | struct cifs_ses *ses = sess_data->ses; | |
799 | __u32 capabilities; | |
800 | __u16 bytes_remaining; | |
801 | ||
802 | /* old style NTLM sessionsetup */ | |
803 | /* wct = 13 */ | |
804 | rc = sess_alloc_buffer(sess_data, 13); | |
805 | if (rc) | |
806 | goto out; | |
807 | ||
808 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
809 | bcc_ptr = sess_data->iov[2].iov_base; | |
810 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
811 | ||
812 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
777f69b8 SM |
813 | if (ses->user_name != NULL) { |
814 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
815 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
816 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
817 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
818 | ||
819 | /* calculate ntlm response and session key */ | |
820 | rc = setup_ntlm_response(ses, sess_data->nls_cp); | |
821 | if (rc) { | |
822 | cifs_dbg(VFS, "Error %d during NTLM authentication\n", | |
823 | rc); | |
824 | goto out; | |
825 | } | |
583cf7af | 826 | |
777f69b8 SM |
827 | /* copy ntlm response */ |
828 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
829 | CIFS_AUTH_RESP_SIZE); | |
830 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
831 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
832 | CIFS_AUTH_RESP_SIZE); | |
833 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
834 | } else { | |
835 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
836 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
837 | } | |
583cf7af SP |
838 | |
839 | if (ses->capabilities & CAP_UNICODE) { | |
840 | /* unicode strings must be word aligned */ | |
841 | if (sess_data->iov[0].iov_len % 2) { | |
842 | *bcc_ptr = 0; | |
843 | bcc_ptr++; | |
844 | } | |
845 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
846 | } else { | |
847 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
848 | } | |
849 | ||
850 | ||
851 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
852 | (long) sess_data->iov[2].iov_base; | |
853 | ||
854 | rc = sess_sendreceive(sess_data); | |
855 | if (rc) | |
856 | goto out; | |
857 | ||
858 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
859 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
860 | ||
861 | if (smb_buf->WordCount != 3) { | |
862 | rc = -EIO; | |
863 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
864 | goto out; | |
865 | } | |
866 | ||
867 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
868 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
869 | ||
870 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
871 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
872 | ||
873 | bytes_remaining = get_bcc(smb_buf); | |
874 | bcc_ptr = pByteArea(smb_buf); | |
875 | ||
876 | /* BB check if Unicode and decode strings */ | |
877 | if (bytes_remaining == 0) { | |
878 | /* no string area to decode, do nothing */ | |
879 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
880 | /* unicode string area must be word-aligned */ | |
881 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
882 | ++bcc_ptr; | |
883 | --bytes_remaining; | |
884 | } | |
885 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
886 | sess_data->nls_cp); | |
887 | } else { | |
888 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
889 | sess_data->nls_cp); | |
890 | } | |
891 | ||
892 | rc = sess_establish_session(sess_data); | |
893 | out: | |
894 | sess_data->result = rc; | |
895 | sess_data->func = NULL; | |
896 | sess_free_buffer(sess_data); | |
897 | kfree(ses->auth_key.response); | |
898 | ses->auth_key.response = NULL; | |
899 | } | |
900 | ||
901 | static void | |
902 | sess_auth_ntlmv2(struct sess_data *sess_data) | |
903 | { | |
904 | int rc = 0; | |
905 | struct smb_hdr *smb_buf; | |
906 | SESSION_SETUP_ANDX *pSMB; | |
907 | char *bcc_ptr; | |
908 | struct cifs_ses *ses = sess_data->ses; | |
909 | __u32 capabilities; | |
910 | __u16 bytes_remaining; | |
911 | ||
912 | /* old style NTLM sessionsetup */ | |
913 | /* wct = 13 */ | |
914 | rc = sess_alloc_buffer(sess_data, 13); | |
915 | if (rc) | |
916 | goto out; | |
917 | ||
918 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
919 | bcc_ptr = sess_data->iov[2].iov_base; | |
920 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
921 | ||
922 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
923 | ||
924 | /* LM2 password would be here if we supported it */ | |
925 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
926 | ||
1a967d6c SM |
927 | if (ses->user_name != NULL) { |
928 | /* calculate nlmv2 response and session key */ | |
929 | rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp); | |
930 | if (rc) { | |
931 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc); | |
932 | goto out; | |
933 | } | |
583cf7af | 934 | |
1a967d6c SM |
935 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
936 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
937 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
583cf7af | 938 | |
1a967d6c SM |
939 | /* set case sensitive password length after tilen may get |
940 | * assigned, tilen is 0 otherwise. | |
941 | */ | |
942 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
943 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
944 | } else { | |
945 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
946 | } | |
583cf7af SP |
947 | |
948 | if (ses->capabilities & CAP_UNICODE) { | |
949 | if (sess_data->iov[0].iov_len % 2) { | |
950 | *bcc_ptr = 0; | |
951 | bcc_ptr++; | |
952 | } | |
953 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
954 | } else { | |
955 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
956 | } | |
957 | ||
958 | ||
959 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
960 | (long) sess_data->iov[2].iov_base; | |
961 | ||
962 | rc = sess_sendreceive(sess_data); | |
963 | if (rc) | |
964 | goto out; | |
965 | ||
966 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
967 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
968 | ||
969 | if (smb_buf->WordCount != 3) { | |
970 | rc = -EIO; | |
971 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
972 | goto out; | |
973 | } | |
974 | ||
975 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
976 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
977 | ||
978 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
979 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
980 | ||
981 | bytes_remaining = get_bcc(smb_buf); | |
982 | bcc_ptr = pByteArea(smb_buf); | |
983 | ||
984 | /* BB check if Unicode and decode strings */ | |
985 | if (bytes_remaining == 0) { | |
986 | /* no string area to decode, do nothing */ | |
987 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
988 | /* unicode string area must be word-aligned */ | |
989 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
990 | ++bcc_ptr; | |
991 | --bytes_remaining; | |
992 | } | |
993 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
994 | sess_data->nls_cp); | |
995 | } else { | |
996 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
997 | sess_data->nls_cp); | |
998 | } | |
999 | ||
1000 | rc = sess_establish_session(sess_data); | |
1001 | out: | |
1002 | sess_data->result = rc; | |
1003 | sess_data->func = NULL; | |
1004 | sess_free_buffer(sess_data); | |
1005 | kfree(ses->auth_key.response); | |
1006 | ses->auth_key.response = NULL; | |
1007 | } | |
1008 | ||
ee03c646 SP |
1009 | #ifdef CONFIG_CIFS_UPCALL |
1010 | static void | |
1011 | sess_auth_kerberos(struct sess_data *sess_data) | |
1012 | { | |
1013 | int rc = 0; | |
1014 | struct smb_hdr *smb_buf; | |
1015 | SESSION_SETUP_ANDX *pSMB; | |
1016 | char *bcc_ptr; | |
1017 | struct cifs_ses *ses = sess_data->ses; | |
1018 | __u32 capabilities; | |
1019 | __u16 bytes_remaining; | |
1020 | struct key *spnego_key = NULL; | |
1021 | struct cifs_spnego_msg *msg; | |
1022 | u16 blob_len; | |
1023 | ||
1024 | /* extended security */ | |
1025 | /* wct = 12 */ | |
1026 | rc = sess_alloc_buffer(sess_data, 12); | |
1027 | if (rc) | |
1028 | goto out; | |
1029 | ||
1030 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1031 | bcc_ptr = sess_data->iov[2].iov_base; | |
1032 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1033 | ||
1034 | spnego_key = cifs_get_spnego_key(ses); | |
1035 | if (IS_ERR(spnego_key)) { | |
1036 | rc = PTR_ERR(spnego_key); | |
1037 | spnego_key = NULL; | |
1038 | goto out; | |
1039 | } | |
1040 | ||
146aa8b1 | 1041 | msg = spnego_key->payload.data[0]; |
ee03c646 SP |
1042 | /* |
1043 | * check version field to make sure that cifs.upcall is | |
1044 | * sending us a response in an expected form | |
1045 | */ | |
1046 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
1047 | cifs_dbg(VFS, | |
1048 | "incorrect version of cifs.upcall (expected %d but got %d)", | |
1049 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
1050 | rc = -EKEYREJECTED; | |
1051 | goto out_put_spnego_key; | |
1052 | } | |
1053 | ||
1054 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
1055 | GFP_KERNEL); | |
1056 | if (!ses->auth_key.response) { | |
1057 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory", | |
1058 | msg->sesskey_len); | |
1059 | rc = -ENOMEM; | |
1060 | goto out_put_spnego_key; | |
1061 | } | |
1062 | ses->auth_key.len = msg->sesskey_len; | |
1063 | ||
1064 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
1065 | capabilities |= CAP_EXTENDED_SECURITY; | |
1066 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
1067 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1068 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1069 | pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len); | |
1070 | ||
1071 | if (ses->capabilities & CAP_UNICODE) { | |
1072 | /* unicode strings must be word aligned */ | |
1073 | if ((sess_data->iov[0].iov_len | |
1074 | + sess_data->iov[1].iov_len) % 2) { | |
1075 | *bcc_ptr = 0; | |
1076 | bcc_ptr++; | |
1077 | } | |
1078 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); | |
1079 | unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp); | |
1080 | } else { | |
1081 | /* BB: is this right? */ | |
1082 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1083 | } | |
1084 | ||
1085 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1086 | (long) sess_data->iov[2].iov_base; | |
1087 | ||
1088 | rc = sess_sendreceive(sess_data); | |
1089 | if (rc) | |
1090 | goto out_put_spnego_key; | |
1091 | ||
1092 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1093 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1094 | ||
1095 | if (smb_buf->WordCount != 4) { | |
1096 | rc = -EIO; | |
1097 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1098 | goto out_put_spnego_key; | |
1099 | } | |
1100 | ||
1101 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1102 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1103 | ||
1104 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1105 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1106 | ||
1107 | bytes_remaining = get_bcc(smb_buf); | |
1108 | bcc_ptr = pByteArea(smb_buf); | |
1109 | ||
1110 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
1111 | if (blob_len > bytes_remaining) { | |
1112 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1113 | blob_len); | |
1114 | rc = -EINVAL; | |
1115 | goto out_put_spnego_key; | |
1116 | } | |
1117 | bcc_ptr += blob_len; | |
1118 | bytes_remaining -= blob_len; | |
1119 | ||
1120 | /* BB check if Unicode and decode strings */ | |
1121 | if (bytes_remaining == 0) { | |
1122 | /* no string area to decode, do nothing */ | |
1123 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1124 | /* unicode string area must be word-aligned */ | |
1125 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1126 | ++bcc_ptr; | |
1127 | --bytes_remaining; | |
1128 | } | |
1129 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1130 | sess_data->nls_cp); | |
1131 | } else { | |
1132 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1133 | sess_data->nls_cp); | |
1134 | } | |
1135 | ||
1136 | rc = sess_establish_session(sess_data); | |
1137 | out_put_spnego_key: | |
1138 | key_invalidate(spnego_key); | |
1139 | key_put(spnego_key); | |
1140 | out: | |
1141 | sess_data->result = rc; | |
1142 | sess_data->func = NULL; | |
1143 | sess_free_buffer(sess_data); | |
1144 | kfree(ses->auth_key.response); | |
1145 | ses->auth_key.response = NULL; | |
1146 | } | |
1147 | ||
ee03c646 | 1148 | #endif /* ! CONFIG_CIFS_UPCALL */ |
583cf7af | 1149 | |
cc87c47d SP |
1150 | /* |
1151 | * The required kvec buffers have to be allocated before calling this | |
1152 | * function. | |
1153 | */ | |
1154 | static int | |
1155 | _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data) | |
3979877e | 1156 | { |
3979877e | 1157 | struct smb_hdr *smb_buf; |
3979877e | 1158 | SESSION_SETUP_ANDX *pSMB; |
cc87c47d | 1159 | struct cifs_ses *ses = sess_data->ses; |
3979877e | 1160 | __u32 capabilities; |
cc87c47d | 1161 | char *bcc_ptr; |
254e55ed | 1162 | |
cc87c47d SP |
1163 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1164 | smb_buf = (struct smb_hdr *)pSMB; | |
1165 | ||
1166 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1167 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { | |
1168 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); | |
1169 | return -ENOSYS; | |
3534b850 | 1170 | } |
3979877e | 1171 | |
cc87c47d SP |
1172 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
1173 | capabilities |= CAP_EXTENDED_SECURITY; | |
1174 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
80a0e637 | 1175 | |
cc87c47d SP |
1176 | bcc_ptr = sess_data->iov[2].iov_base; |
1177 | /* unicode strings must be word aligned */ | |
1178 | if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) { | |
1179 | *bcc_ptr = 0; | |
1180 | bcc_ptr++; | |
3f618223 | 1181 | } |
cc87c47d | 1182 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); |
3f618223 | 1183 | |
cc87c47d SP |
1184 | sess_data->iov[2].iov_len = (long) bcc_ptr - |
1185 | (long) sess_data->iov[2].iov_base; | |
80a0e637 | 1186 | |
cc87c47d SP |
1187 | return 0; |
1188 | } | |
1189 | ||
1190 | static void | |
1191 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data); | |
1192 | ||
1193 | static void | |
1194 | sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data) | |
1195 | { | |
1196 | int rc; | |
1197 | struct smb_hdr *smb_buf; | |
1198 | SESSION_SETUP_ANDX *pSMB; | |
1199 | struct cifs_ses *ses = sess_data->ses; | |
1200 | __u16 bytes_remaining; | |
1201 | char *bcc_ptr; | |
1202 | u16 blob_len; | |
1203 | ||
1204 | cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n"); | |
5c234aa5 | 1205 | |
cc87c47d SP |
1206 | /* |
1207 | * if memory allocation is successful, caller of this function | |
1208 | * frees it. | |
1209 | */ | |
1210 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
1211 | if (!ses->ntlmssp) { | |
1212 | rc = -ENOMEM; | |
1213 | goto out; | |
d3686d54 | 1214 | } |
cc87c47d | 1215 | ses->ntlmssp->sesskey_per_smbsess = false; |
d3686d54 | 1216 | |
cc87c47d SP |
1217 | /* wct = 12 */ |
1218 | rc = sess_alloc_buffer(sess_data, 12); | |
1219 | if (rc) | |
1220 | goto out; | |
0b3cc858 | 1221 | |
cc87c47d | 1222 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
3979877e | 1223 | |
cc87c47d SP |
1224 | /* Build security blob before we assemble the request */ |
1225 | build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses); | |
1226 | sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
1227 | sess_data->iov[1].iov_base = pSMB->req.SecurityBlob; | |
1228 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
1229 | ||
1230 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
790fe579 | 1231 | if (rc) |
cc87c47d | 1232 | goto out; |
3979877e | 1233 | |
cc87c47d | 1234 | rc = sess_sendreceive(sess_data); |
3979877e | 1235 | |
cc87c47d SP |
1236 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1237 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
750d1151 | 1238 | |
cc87c47d SP |
1239 | /* If true, rc here is expected and not an error */ |
1240 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
1241 | smb_buf->Status.CifsError == | |
1242 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)) | |
1243 | rc = 0; | |
2442421b | 1244 | |
cc87c47d SP |
1245 | if (rc) |
1246 | goto out; | |
1247 | ||
1248 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); | |
1249 | ||
1250 | if (smb_buf->WordCount != 4) { | |
1251 | rc = -EIO; | |
1252 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1253 | goto out; | |
5e6e6232 | 1254 | } |
3979877e | 1255 | |
cc87c47d SP |
1256 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
1257 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
2442421b | 1258 | |
cc87c47d SP |
1259 | bytes_remaining = get_bcc(smb_buf); |
1260 | bcc_ptr = pByteArea(smb_buf); | |
b4d6fcf1 | 1261 | |
cc87c47d SP |
1262 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1263 | if (blob_len > bytes_remaining) { | |
1264 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1265 | blob_len); | |
1266 | rc = -EINVAL; | |
1267 | goto out; | |
1268 | } | |
0b3cc858 | 1269 | |
cc87c47d SP |
1270 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); |
1271 | out: | |
1272 | sess_free_buffer(sess_data); | |
1273 | ||
1274 | if (!rc) { | |
1275 | sess_data->func = sess_auth_rawntlmssp_authenticate; | |
1276 | return; | |
3979877e SF |
1277 | } |
1278 | ||
cc87c47d SP |
1279 | /* Else error. Cleanup */ |
1280 | kfree(ses->auth_key.response); | |
1281 | ses->auth_key.response = NULL; | |
1282 | kfree(ses->ntlmssp); | |
1283 | ses->ntlmssp = NULL; | |
2442421b | 1284 | |
cc87c47d SP |
1285 | sess_data->func = NULL; |
1286 | sess_data->result = rc; | |
1287 | } | |
3979877e | 1288 | |
cc87c47d SP |
1289 | static void |
1290 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data) | |
1291 | { | |
1292 | int rc; | |
1293 | struct smb_hdr *smb_buf; | |
1294 | SESSION_SETUP_ANDX *pSMB; | |
1295 | struct cifs_ses *ses = sess_data->ses; | |
1296 | __u16 bytes_remaining; | |
1297 | char *bcc_ptr; | |
b8da344b | 1298 | unsigned char *ntlmsspblob = NULL; |
cc87c47d | 1299 | u16 blob_len; |
3979877e | 1300 | |
cc87c47d | 1301 | cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n"); |
3979877e | 1302 | |
cc87c47d SP |
1303 | /* wct = 12 */ |
1304 | rc = sess_alloc_buffer(sess_data, 12); | |
1305 | if (rc) | |
1306 | goto out; | |
3979877e | 1307 | |
cc87c47d SP |
1308 | /* Build security blob before we assemble the request */ |
1309 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1310 | smb_buf = (struct smb_hdr *)pSMB; | |
b8da344b | 1311 | rc = build_ntlmssp_auth_blob(&ntlmsspblob, |
cc87c47d SP |
1312 | &blob_len, ses, sess_data->nls_cp); |
1313 | if (rc) | |
1314 | goto out_free_ntlmsspblob; | |
1315 | sess_data->iov[1].iov_len = blob_len; | |
1316 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1317 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
1318 | /* | |
1319 | * Make sure that we tell the server that we are using | |
1320 | * the uid that it just gave us back on the response | |
1321 | * (challenge) | |
1322 | */ | |
1323 | smb_buf->Uid = ses->Suid; | |
1324 | ||
1325 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
0b3cc858 | 1326 | if (rc) |
cc87c47d | 1327 | goto out_free_ntlmsspblob; |
0b3cc858 | 1328 | |
cc87c47d SP |
1329 | rc = sess_sendreceive(sess_data); |
1330 | if (rc) | |
1331 | goto out_free_ntlmsspblob; | |
1332 | ||
1333 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1334 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
583cf7af | 1335 | if (smb_buf->WordCount != 4) { |
3979877e | 1336 | rc = -EIO; |
f96637be | 1337 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
cc87c47d | 1338 | goto out_free_ntlmsspblob; |
3979877e | 1339 | } |
cc87c47d SP |
1340 | |
1341 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
f96637be | 1342 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
cc87c47d | 1343 | |
ee9bbf46 SP |
1344 | if (ses->Suid != smb_buf->Uid) { |
1345 | ses->Suid = smb_buf->Uid; | |
1346 | cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid); | |
1347 | } | |
1348 | ||
690c522f | 1349 | bytes_remaining = get_bcc(smb_buf); |
3979877e | 1350 | bcc_ptr = pByteArea(smb_buf); |
583cf7af SP |
1351 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1352 | if (blob_len > bytes_remaining) { | |
1353 | cifs_dbg(VFS, "bad security blob length %d\n", | |
cc87c47d | 1354 | blob_len); |
583cf7af | 1355 | rc = -EINVAL; |
cc87c47d | 1356 | goto out_free_ntlmsspblob; |
790fe579 | 1357 | } |
583cf7af SP |
1358 | bcc_ptr += blob_len; |
1359 | bytes_remaining -= blob_len; | |
3979877e | 1360 | |
cc87c47d | 1361 | |
3979877e | 1362 | /* BB check if Unicode and decode strings */ |
fcda7f45 JL |
1363 | if (bytes_remaining == 0) { |
1364 | /* no string area to decode, do nothing */ | |
1365 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 JL |
1366 | /* unicode string area must be word-aligned */ |
1367 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1368 | ++bcc_ptr; | |
1369 | --bytes_remaining; | |
1370 | } | |
cc87c47d SP |
1371 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, |
1372 | sess_data->nls_cp); | |
27b87fe5 | 1373 | } else { |
cc87c47d SP |
1374 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, |
1375 | sess_data->nls_cp); | |
27b87fe5 | 1376 | } |
50c2f753 | 1377 | |
cc87c47d | 1378 | out_free_ntlmsspblob: |
2b149f11 | 1379 | kfree(ntlmsspblob); |
cc87c47d SP |
1380 | out: |
1381 | sess_free_buffer(sess_data); | |
d4e63bd6 | 1382 | |
cc87c47d SP |
1383 | if (!rc) |
1384 | rc = sess_establish_session(sess_data); | |
d4e63bd6 | 1385 | |
cc87c47d | 1386 | /* Cleanup */ |
d4e63bd6 SP |
1387 | kfree(ses->auth_key.response); |
1388 | ses->auth_key.response = NULL; | |
1389 | kfree(ses->ntlmssp); | |
cc87c47d | 1390 | ses->ntlmssp = NULL; |
d4e63bd6 | 1391 | |
cc87c47d SP |
1392 | sess_data->func = NULL; |
1393 | sess_data->result = rc; | |
1394 | } | |
80a0e637 | 1395 | |
27924075 | 1396 | static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data) |
cc87c47d SP |
1397 | { |
1398 | int type; | |
1399 | ||
ef65aaed | 1400 | type = cifs_select_sectype(ses->server, ses->sectype); |
cc87c47d SP |
1401 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1402 | if (type == Unspecified) { | |
1403 | cifs_dbg(VFS, | |
1404 | "Unable to select appropriate authentication method!"); | |
1405 | return -EINVAL; | |
1406 | } | |
1407 | ||
1408 | switch (type) { | |
1409 | case LANMAN: | |
1410 | /* LANMAN and plaintext are less secure and off by default. | |
1411 | * So we make this explicitly be turned on in kconfig (in the | |
1412 | * build) and turned on at runtime (changed from the default) | |
1413 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
1414 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
1415 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1416 | sess_data->func = sess_auth_lanman; | |
1417 | break; | |
1418 | #else | |
1419 | return -EOPNOTSUPP; | |
1420 | #endif | |
1421 | case NTLM: | |
1422 | sess_data->func = sess_auth_ntlm; | |
1423 | break; | |
1424 | case NTLMv2: | |
1425 | sess_data->func = sess_auth_ntlmv2; | |
1426 | break; | |
1427 | case Kerberos: | |
1428 | #ifdef CONFIG_CIFS_UPCALL | |
1429 | sess_data->func = sess_auth_kerberos; | |
1430 | break; | |
1431 | #else | |
1432 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1433 | return -ENOSYS; | |
1434 | break; | |
1435 | #endif /* CONFIG_CIFS_UPCALL */ | |
1436 | case RawNTLMSSP: | |
1437 | sess_data->func = sess_auth_rawntlmssp_negotiate; | |
1438 | break; | |
1439 | default: | |
1440 | cifs_dbg(VFS, "secType %d not supported!\n", type); | |
1441 | return -ENOSYS; | |
1442 | } | |
1443 | ||
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, | |
1448 | const struct nls_table *nls_cp) | |
1449 | { | |
1450 | int rc = 0; | |
1451 | struct sess_data *sess_data; | |
1452 | ||
1453 | if (ses == NULL) { | |
1454 | WARN(1, "%s: ses == NULL!", __func__); | |
1455 | return -EINVAL; | |
1456 | } | |
1457 | ||
1458 | sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL); | |
1459 | if (!sess_data) | |
1460 | return -ENOMEM; | |
1461 | ||
1462 | rc = select_sec(ses, sess_data); | |
1463 | if (rc) | |
1464 | goto out; | |
1465 | ||
1466 | sess_data->xid = xid; | |
1467 | sess_data->ses = ses; | |
1468 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1469 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
1470 | ||
1471 | while (sess_data->func) | |
1472 | sess_data->func(sess_data); | |
1473 | ||
1474 | /* Store result before we free sess_data */ | |
80a0e637 | 1475 | rc = sess_data->result; |
cc87c47d SP |
1476 | |
1477 | out: | |
80a0e637 SP |
1478 | kfree(sess_data); |
1479 | return rc; | |
3979877e | 1480 | } |