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Commit | Line | Data |
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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); | |
401 | sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer; | |
402 | ||
0b3cc858 SF |
403 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
404 | sec_blob->MessageType = NtLmAuthenticate; | |
405 | ||
406 | flags = NTLMSSP_NEGOTIATE_56 | | |
407 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
408 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
409 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
410 | NTLMSSP_NEGOTIATE_SEAL; | |
411 | if (ses->server->sign) | |
0b3cc858 | 412 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
413 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
414 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 415 | |
b8da344b | 416 | tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); |
df8fbc24 | 417 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
418 | |
419 | sec_blob->LmChallengeResponse.BufferOffset = | |
420 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
421 | sec_blob->LmChallengeResponse.Length = 0; | |
422 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
423 | ||
b8da344b JM |
424 | sec_blob->NtChallengeResponse.BufferOffset = |
425 | cpu_to_le32(tmp - *pbuffer); | |
cfda35d9 | 426 | if (ses->user_name != NULL) { |
cfda35d9 SM |
427 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
428 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
429 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
430 | ||
431 | sec_blob->NtChallengeResponse.Length = | |
432 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
433 | sec_blob->NtChallengeResponse.MaximumLength = | |
434 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
435 | } else { | |
436 | /* | |
437 | * don't send an NT Response for anonymous access | |
438 | */ | |
439 | sec_blob->NtChallengeResponse.Length = 0; | |
440 | sec_blob->NtChallengeResponse.MaximumLength = 0; | |
2b149f11 | 441 | } |
0b3cc858 SF |
442 | |
443 | if (ses->domainName == NULL) { | |
b8da344b | 444 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
445 | sec_blob->DomainName.Length = 0; |
446 | sec_blob->DomainName.MaximumLength = 0; | |
447 | tmp += 2; | |
448 | } else { | |
449 | int len; | |
acbbb76a | 450 | len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName, |
202d772b | 451 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0b3cc858 | 452 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 453 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
454 | sec_blob->DomainName.Length = cpu_to_le16(len); |
455 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
456 | tmp += len; | |
457 | } | |
458 | ||
8727c8a8 | 459 | if (ses->user_name == NULL) { |
b8da344b | 460 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
461 | sec_blob->UserName.Length = 0; |
462 | sec_blob->UserName.MaximumLength = 0; | |
463 | tmp += 2; | |
464 | } else { | |
465 | int len; | |
acbbb76a | 466 | len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name, |
8c3a2b4c | 467 | CIFS_MAX_USERNAME_LEN, nls_cp); |
0b3cc858 | 468 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 469 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
470 | sec_blob->UserName.Length = cpu_to_le16(len); |
471 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
472 | tmp += len; | |
473 | } | |
474 | ||
b8da344b | 475 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
476 | sec_blob->WorkstationName.Length = 0; |
477 | sec_blob->WorkstationName.MaximumLength = 0; | |
478 | tmp += 2; | |
479 | ||
df8fbc24 SP |
480 | if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || |
481 | (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) | |
482 | && !calc_seckey(ses)) { | |
d3686d54 | 483 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
b8da344b | 484 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
485 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); |
486 | sec_blob->SessionKey.MaximumLength = | |
487 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
488 | tmp += CIFS_CPHTXT_SIZE; | |
489 | } else { | |
b8da344b | 490 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
491 | sec_blob->SessionKey.Length = 0; |
492 | sec_blob->SessionKey.MaximumLength = 0; | |
493 | } | |
2b149f11 | 494 | |
b8da344b | 495 | *buflen = tmp - *pbuffer; |
2b149f11 | 496 | setup_ntlmv2_ret: |
89f150f4 | 497 | return rc; |
0b3cc858 | 498 | } |
0b3cc858 | 499 | |
3f618223 | 500 | enum securityEnum |
ef65aaed | 501 | cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
3f618223 JL |
502 | { |
503 | switch (server->negflavor) { | |
504 | case CIFS_NEGFLAVOR_EXTENDED: | |
505 | switch (requested) { | |
506 | case Kerberos: | |
507 | case RawNTLMSSP: | |
508 | return requested; | |
509 | case Unspecified: | |
510 | if (server->sec_ntlmssp && | |
511 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
512 | return RawNTLMSSP; | |
513 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
514 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
515 | return Kerberos; | |
516 | /* Fallthrough */ | |
517 | default: | |
518 | return Unspecified; | |
519 | } | |
520 | case CIFS_NEGFLAVOR_UNENCAP: | |
521 | switch (requested) { | |
522 | case NTLM: | |
523 | case NTLMv2: | |
524 | return requested; | |
525 | case Unspecified: | |
526 | if (global_secflags & CIFSSEC_MAY_NTLMV2) | |
527 | return NTLMv2; | |
528 | if (global_secflags & CIFSSEC_MAY_NTLM) | |
529 | return NTLM; | |
3f618223 | 530 | default: |
dde2356c SP |
531 | /* Fallthrough to attempt LANMAN authentication next */ |
532 | break; | |
3f618223 JL |
533 | } |
534 | case CIFS_NEGFLAVOR_LANMAN: | |
535 | switch (requested) { | |
536 | case LANMAN: | |
537 | return requested; | |
538 | case Unspecified: | |
539 | if (global_secflags & CIFSSEC_MAY_LANMAN) | |
540 | return LANMAN; | |
541 | /* Fallthrough */ | |
542 | default: | |
543 | return Unspecified; | |
544 | } | |
545 | default: | |
546 | return Unspecified; | |
547 | } | |
548 | } | |
549 | ||
80a0e637 SP |
550 | struct sess_data { |
551 | unsigned int xid; | |
552 | struct cifs_ses *ses; | |
553 | struct nls_table *nls_cp; | |
554 | void (*func)(struct sess_data *); | |
555 | int result; | |
556 | ||
557 | /* we will send the SMB in three pieces: | |
558 | * a fixed length beginning part, an optional | |
559 | * SPNEGO blob (which can be zero length), and a | |
560 | * last part which will include the strings | |
561 | * and rest of bcc area. This allows us to avoid | |
562 | * a large buffer 17K allocation | |
563 | */ | |
564 | int buf0_type; | |
565 | struct kvec iov[3]; | |
566 | }; | |
567 | ||
568 | static int | |
569 | sess_alloc_buffer(struct sess_data *sess_data, int wct) | |
570 | { | |
571 | int rc; | |
572 | struct cifs_ses *ses = sess_data->ses; | |
573 | struct smb_hdr *smb_buf; | |
574 | ||
575 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
576 | (void **)&smb_buf); | |
577 | ||
578 | if (rc) | |
579 | return rc; | |
580 | ||
581 | sess_data->iov[0].iov_base = (char *)smb_buf; | |
582 | sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; | |
583 | /* | |
584 | * This variable will be used to clear the buffer | |
585 | * allocated above in case of any error in the calling function. | |
586 | */ | |
587 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
588 | ||
589 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
590 | sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL); | |
591 | if (!sess_data->iov[2].iov_base) { | |
592 | rc = -ENOMEM; | |
593 | goto out_free_smb_buf; | |
594 | } | |
595 | ||
596 | return 0; | |
597 | ||
598 | out_free_smb_buf: | |
599 | kfree(smb_buf); | |
600 | sess_data->iov[0].iov_base = NULL; | |
601 | sess_data->iov[0].iov_len = 0; | |
602 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
603 | return rc; | |
604 | } | |
605 | ||
606 | static void | |
607 | sess_free_buffer(struct sess_data *sess_data) | |
608 | { | |
609 | ||
610 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
611 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
612 | kfree(sess_data->iov[2].iov_base); | |
613 | } | |
614 | ||
615 | static int | |
616 | sess_establish_session(struct sess_data *sess_data) | |
617 | { | |
618 | struct cifs_ses *ses = sess_data->ses; | |
619 | ||
620 | mutex_lock(&ses->server->srv_mutex); | |
621 | if (!ses->server->session_estab) { | |
622 | if (ses->server->sign) { | |
623 | ses->server->session_key.response = | |
624 | kmemdup(ses->auth_key.response, | |
625 | ses->auth_key.len, GFP_KERNEL); | |
626 | if (!ses->server->session_key.response) { | |
627 | mutex_unlock(&ses->server->srv_mutex); | |
628 | return -ENOMEM; | |
629 | } | |
630 | ses->server->session_key.len = | |
631 | ses->auth_key.len; | |
632 | } | |
633 | ses->server->sequence_number = 0x2; | |
634 | ses->server->session_estab = true; | |
635 | } | |
636 | mutex_unlock(&ses->server->srv_mutex); | |
637 | ||
638 | cifs_dbg(FYI, "CIFS session established successfully\n"); | |
639 | spin_lock(&GlobalMid_Lock); | |
640 | ses->status = CifsGood; | |
641 | ses->need_reconnect = false; | |
642 | spin_unlock(&GlobalMid_Lock); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static int | |
648 | sess_sendreceive(struct sess_data *sess_data) | |
649 | { | |
650 | int rc; | |
651 | struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base; | |
652 | __u16 count; | |
da502f7d | 653 | struct kvec rsp_iov = { NULL, 0 }; |
80a0e637 SP |
654 | |
655 | count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len; | |
656 | smb_buf->smb_buf_length = | |
657 | cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count); | |
658 | put_bcc(count, smb_buf); | |
659 | ||
660 | rc = SendReceive2(sess_data->xid, sess_data->ses, | |
661 | sess_data->iov, 3 /* num_iovecs */, | |
662 | &sess_data->buf0_type, | |
da502f7d PS |
663 | CIFS_LOG_ERROR, &rsp_iov); |
664 | cifs_small_buf_release(sess_data->iov[0].iov_base); | |
665 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
80a0e637 SP |
666 | |
667 | return rc; | |
668 | } | |
669 | ||
670 | /* | |
671 | * LANMAN and plaintext are less secure and off by default. | |
672 | * So we make this explicitly be turned on in kconfig (in the | |
673 | * build) and turned on at runtime (changed from the default) | |
674 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
675 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 | |
676 | */ | |
677 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
678 | static void | |
679 | sess_auth_lanman(struct sess_data *sess_data) | |
680 | { | |
681 | int rc = 0; | |
682 | struct smb_hdr *smb_buf; | |
683 | SESSION_SETUP_ANDX *pSMB; | |
684 | char *bcc_ptr; | |
685 | struct cifs_ses *ses = sess_data->ses; | |
686 | char lnm_session_key[CIFS_AUTH_RESP_SIZE]; | |
687 | __u32 capabilities; | |
688 | __u16 bytes_remaining; | |
689 | ||
690 | /* lanman 2 style sessionsetup */ | |
691 | /* wct = 10 */ | |
692 | rc = sess_alloc_buffer(sess_data, 10); | |
693 | if (rc) | |
694 | goto out; | |
695 | ||
696 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
697 | bcc_ptr = sess_data->iov[2].iov_base; | |
698 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
699 | ||
700 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; | |
701 | ||
fa8f3a35 SM |
702 | if (ses->user_name != NULL) { |
703 | /* no capabilities flags in old lanman negotiation */ | |
704 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
80a0e637 | 705 | |
fa8f3a35 SM |
706 | /* Calculate hash with password and copy into bcc_ptr. |
707 | * Encryption Key (stored as in cryptkey) gets used if the | |
708 | * security mode bit in Negottiate Protocol response states | |
709 | * to use challenge/response method (i.e. Password bit is 1). | |
710 | */ | |
711 | rc = calc_lanman_hash(ses->password, ses->server->cryptkey, | |
712 | ses->server->sec_mode & SECMODE_PW_ENCRYPT ? | |
713 | true : false, lnm_session_key); | |
a6b6befb LB |
714 | if (rc) |
715 | goto out; | |
80a0e637 | 716 | |
fa8f3a35 SM |
717 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); |
718 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
719 | } else { | |
720 | pSMB->old_req.PasswordLength = 0; | |
721 | } | |
80a0e637 SP |
722 | |
723 | /* | |
724 | * can not sign if LANMAN negotiated so no need | |
725 | * to calculate signing key? but what if server | |
726 | * changed to do higher than lanman dialect and | |
727 | * we reconnected would we ever calc signing_key? | |
728 | */ | |
729 | ||
730 | cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n"); | |
731 | /* Unicode not allowed for LANMAN dialects */ | |
732 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
733 | ||
734 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
735 | (long) sess_data->iov[2].iov_base; | |
736 | ||
737 | rc = sess_sendreceive(sess_data); | |
738 | if (rc) | |
739 | goto out; | |
740 | ||
741 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
742 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
743 | ||
744 | /* lanman response has a word count of 3 */ | |
745 | if (smb_buf->WordCount != 3) { | |
746 | rc = -EIO; | |
747 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
748 | goto out; | |
749 | } | |
750 | ||
751 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
752 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
753 | ||
754 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
755 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
756 | ||
757 | bytes_remaining = get_bcc(smb_buf); | |
758 | bcc_ptr = pByteArea(smb_buf); | |
759 | ||
760 | /* BB check if Unicode and decode strings */ | |
761 | if (bytes_remaining == 0) { | |
762 | /* no string area to decode, do nothing */ | |
763 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
764 | /* unicode string area must be word-aligned */ | |
765 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
766 | ++bcc_ptr; | |
767 | --bytes_remaining; | |
768 | } | |
769 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
770 | sess_data->nls_cp); | |
771 | } else { | |
772 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
773 | sess_data->nls_cp); | |
774 | } | |
775 | ||
776 | rc = sess_establish_session(sess_data); | |
777 | out: | |
778 | sess_data->result = rc; | |
779 | sess_data->func = NULL; | |
780 | sess_free_buffer(sess_data); | |
781 | } | |
782 | ||
80a0e637 SP |
783 | #endif |
784 | ||
583cf7af SP |
785 | static void |
786 | sess_auth_ntlm(struct sess_data *sess_data) | |
787 | { | |
788 | int rc = 0; | |
789 | struct smb_hdr *smb_buf; | |
790 | SESSION_SETUP_ANDX *pSMB; | |
791 | char *bcc_ptr; | |
792 | struct cifs_ses *ses = sess_data->ses; | |
793 | __u32 capabilities; | |
794 | __u16 bytes_remaining; | |
795 | ||
796 | /* old style NTLM sessionsetup */ | |
797 | /* wct = 13 */ | |
798 | rc = sess_alloc_buffer(sess_data, 13); | |
799 | if (rc) | |
800 | goto out; | |
801 | ||
802 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
803 | bcc_ptr = sess_data->iov[2].iov_base; | |
804 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
805 | ||
806 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
777f69b8 SM |
807 | if (ses->user_name != NULL) { |
808 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
809 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
810 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
811 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
812 | ||
813 | /* calculate ntlm response and session key */ | |
814 | rc = setup_ntlm_response(ses, sess_data->nls_cp); | |
815 | if (rc) { | |
816 | cifs_dbg(VFS, "Error %d during NTLM authentication\n", | |
817 | rc); | |
818 | goto out; | |
819 | } | |
583cf7af | 820 | |
777f69b8 SM |
821 | /* copy ntlm response */ |
822 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
823 | CIFS_AUTH_RESP_SIZE); | |
824 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
825 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
826 | CIFS_AUTH_RESP_SIZE); | |
827 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
828 | } else { | |
829 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
830 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
831 | } | |
583cf7af SP |
832 | |
833 | if (ses->capabilities & CAP_UNICODE) { | |
834 | /* unicode strings must be word aligned */ | |
835 | if (sess_data->iov[0].iov_len % 2) { | |
836 | *bcc_ptr = 0; | |
837 | bcc_ptr++; | |
838 | } | |
839 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
840 | } else { | |
841 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
842 | } | |
843 | ||
844 | ||
845 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
846 | (long) sess_data->iov[2].iov_base; | |
847 | ||
848 | rc = sess_sendreceive(sess_data); | |
849 | if (rc) | |
850 | goto out; | |
851 | ||
852 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
853 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
854 | ||
855 | if (smb_buf->WordCount != 3) { | |
856 | rc = -EIO; | |
857 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
858 | goto out; | |
859 | } | |
860 | ||
861 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
862 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
863 | ||
864 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
865 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
866 | ||
867 | bytes_remaining = get_bcc(smb_buf); | |
868 | bcc_ptr = pByteArea(smb_buf); | |
869 | ||
870 | /* BB check if Unicode and decode strings */ | |
871 | if (bytes_remaining == 0) { | |
872 | /* no string area to decode, do nothing */ | |
873 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
874 | /* unicode string area must be word-aligned */ | |
875 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
876 | ++bcc_ptr; | |
877 | --bytes_remaining; | |
878 | } | |
879 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
880 | sess_data->nls_cp); | |
881 | } else { | |
882 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
883 | sess_data->nls_cp); | |
884 | } | |
885 | ||
886 | rc = sess_establish_session(sess_data); | |
887 | out: | |
888 | sess_data->result = rc; | |
889 | sess_data->func = NULL; | |
890 | sess_free_buffer(sess_data); | |
891 | kfree(ses->auth_key.response); | |
892 | ses->auth_key.response = NULL; | |
893 | } | |
894 | ||
895 | static void | |
896 | sess_auth_ntlmv2(struct sess_data *sess_data) | |
897 | { | |
898 | int rc = 0; | |
899 | struct smb_hdr *smb_buf; | |
900 | SESSION_SETUP_ANDX *pSMB; | |
901 | char *bcc_ptr; | |
902 | struct cifs_ses *ses = sess_data->ses; | |
903 | __u32 capabilities; | |
904 | __u16 bytes_remaining; | |
905 | ||
906 | /* old style NTLM sessionsetup */ | |
907 | /* wct = 13 */ | |
908 | rc = sess_alloc_buffer(sess_data, 13); | |
909 | if (rc) | |
910 | goto out; | |
911 | ||
912 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
913 | bcc_ptr = sess_data->iov[2].iov_base; | |
914 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
915 | ||
916 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
917 | ||
918 | /* LM2 password would be here if we supported it */ | |
919 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
920 | ||
1a967d6c SM |
921 | if (ses->user_name != NULL) { |
922 | /* calculate nlmv2 response and session key */ | |
923 | rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp); | |
924 | if (rc) { | |
925 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc); | |
926 | goto out; | |
927 | } | |
583cf7af | 928 | |
1a967d6c SM |
929 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
930 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
931 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
583cf7af | 932 | |
1a967d6c SM |
933 | /* set case sensitive password length after tilen may get |
934 | * assigned, tilen is 0 otherwise. | |
935 | */ | |
936 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
937 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
938 | } else { | |
939 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
940 | } | |
583cf7af SP |
941 | |
942 | if (ses->capabilities & CAP_UNICODE) { | |
943 | if (sess_data->iov[0].iov_len % 2) { | |
944 | *bcc_ptr = 0; | |
945 | bcc_ptr++; | |
946 | } | |
947 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
948 | } else { | |
949 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
950 | } | |
951 | ||
952 | ||
953 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
954 | (long) sess_data->iov[2].iov_base; | |
955 | ||
956 | rc = sess_sendreceive(sess_data); | |
957 | if (rc) | |
958 | goto out; | |
959 | ||
960 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
961 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
962 | ||
963 | if (smb_buf->WordCount != 3) { | |
964 | rc = -EIO; | |
965 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
966 | goto out; | |
967 | } | |
968 | ||
969 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
970 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
971 | ||
972 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
973 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
974 | ||
975 | bytes_remaining = get_bcc(smb_buf); | |
976 | bcc_ptr = pByteArea(smb_buf); | |
977 | ||
978 | /* BB check if Unicode and decode strings */ | |
979 | if (bytes_remaining == 0) { | |
980 | /* no string area to decode, do nothing */ | |
981 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
982 | /* unicode string area must be word-aligned */ | |
983 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
984 | ++bcc_ptr; | |
985 | --bytes_remaining; | |
986 | } | |
987 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
988 | sess_data->nls_cp); | |
989 | } else { | |
990 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
991 | sess_data->nls_cp); | |
992 | } | |
993 | ||
994 | rc = sess_establish_session(sess_data); | |
995 | out: | |
996 | sess_data->result = rc; | |
997 | sess_data->func = NULL; | |
998 | sess_free_buffer(sess_data); | |
999 | kfree(ses->auth_key.response); | |
1000 | ses->auth_key.response = NULL; | |
1001 | } | |
1002 | ||
ee03c646 SP |
1003 | #ifdef CONFIG_CIFS_UPCALL |
1004 | static void | |
1005 | sess_auth_kerberos(struct sess_data *sess_data) | |
1006 | { | |
1007 | int rc = 0; | |
1008 | struct smb_hdr *smb_buf; | |
1009 | SESSION_SETUP_ANDX *pSMB; | |
1010 | char *bcc_ptr; | |
1011 | struct cifs_ses *ses = sess_data->ses; | |
1012 | __u32 capabilities; | |
1013 | __u16 bytes_remaining; | |
1014 | struct key *spnego_key = NULL; | |
1015 | struct cifs_spnego_msg *msg; | |
1016 | u16 blob_len; | |
1017 | ||
1018 | /* extended security */ | |
1019 | /* wct = 12 */ | |
1020 | rc = sess_alloc_buffer(sess_data, 12); | |
1021 | if (rc) | |
1022 | goto out; | |
1023 | ||
1024 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1025 | bcc_ptr = sess_data->iov[2].iov_base; | |
1026 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1027 | ||
1028 | spnego_key = cifs_get_spnego_key(ses); | |
1029 | if (IS_ERR(spnego_key)) { | |
1030 | rc = PTR_ERR(spnego_key); | |
1031 | spnego_key = NULL; | |
1032 | goto out; | |
1033 | } | |
1034 | ||
146aa8b1 | 1035 | msg = spnego_key->payload.data[0]; |
ee03c646 SP |
1036 | /* |
1037 | * check version field to make sure that cifs.upcall is | |
1038 | * sending us a response in an expected form | |
1039 | */ | |
1040 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
1041 | cifs_dbg(VFS, | |
1042 | "incorrect version of cifs.upcall (expected %d but got %d)", | |
1043 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
1044 | rc = -EKEYREJECTED; | |
1045 | goto out_put_spnego_key; | |
1046 | } | |
1047 | ||
1048 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
1049 | GFP_KERNEL); | |
1050 | if (!ses->auth_key.response) { | |
1051 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory", | |
1052 | msg->sesskey_len); | |
1053 | rc = -ENOMEM; | |
1054 | goto out_put_spnego_key; | |
1055 | } | |
1056 | ses->auth_key.len = msg->sesskey_len; | |
1057 | ||
1058 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
1059 | capabilities |= CAP_EXTENDED_SECURITY; | |
1060 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
1061 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1062 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1063 | pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len); | |
1064 | ||
1065 | if (ses->capabilities & CAP_UNICODE) { | |
1066 | /* unicode strings must be word aligned */ | |
1067 | if ((sess_data->iov[0].iov_len | |
1068 | + sess_data->iov[1].iov_len) % 2) { | |
1069 | *bcc_ptr = 0; | |
1070 | bcc_ptr++; | |
1071 | } | |
1072 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); | |
1073 | unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp); | |
1074 | } else { | |
1075 | /* BB: is this right? */ | |
1076 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1077 | } | |
1078 | ||
1079 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1080 | (long) sess_data->iov[2].iov_base; | |
1081 | ||
1082 | rc = sess_sendreceive(sess_data); | |
1083 | if (rc) | |
1084 | goto out_put_spnego_key; | |
1085 | ||
1086 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1087 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1088 | ||
1089 | if (smb_buf->WordCount != 4) { | |
1090 | rc = -EIO; | |
1091 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1092 | goto out_put_spnego_key; | |
1093 | } | |
1094 | ||
1095 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1096 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1097 | ||
1098 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1099 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1100 | ||
1101 | bytes_remaining = get_bcc(smb_buf); | |
1102 | bcc_ptr = pByteArea(smb_buf); | |
1103 | ||
1104 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
1105 | if (blob_len > bytes_remaining) { | |
1106 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1107 | blob_len); | |
1108 | rc = -EINVAL; | |
1109 | goto out_put_spnego_key; | |
1110 | } | |
1111 | bcc_ptr += blob_len; | |
1112 | bytes_remaining -= blob_len; | |
1113 | ||
1114 | /* BB check if Unicode and decode strings */ | |
1115 | if (bytes_remaining == 0) { | |
1116 | /* no string area to decode, do nothing */ | |
1117 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1118 | /* unicode string area must be word-aligned */ | |
1119 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1120 | ++bcc_ptr; | |
1121 | --bytes_remaining; | |
1122 | } | |
1123 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1124 | sess_data->nls_cp); | |
1125 | } else { | |
1126 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1127 | sess_data->nls_cp); | |
1128 | } | |
1129 | ||
1130 | rc = sess_establish_session(sess_data); | |
1131 | out_put_spnego_key: | |
1132 | key_invalidate(spnego_key); | |
1133 | key_put(spnego_key); | |
1134 | out: | |
1135 | sess_data->result = rc; | |
1136 | sess_data->func = NULL; | |
1137 | sess_free_buffer(sess_data); | |
1138 | kfree(ses->auth_key.response); | |
1139 | ses->auth_key.response = NULL; | |
1140 | } | |
1141 | ||
ee03c646 | 1142 | #endif /* ! CONFIG_CIFS_UPCALL */ |
583cf7af | 1143 | |
cc87c47d SP |
1144 | /* |
1145 | * The required kvec buffers have to be allocated before calling this | |
1146 | * function. | |
1147 | */ | |
1148 | static int | |
1149 | _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data) | |
3979877e | 1150 | { |
3979877e | 1151 | struct smb_hdr *smb_buf; |
3979877e | 1152 | SESSION_SETUP_ANDX *pSMB; |
cc87c47d | 1153 | struct cifs_ses *ses = sess_data->ses; |
3979877e | 1154 | __u32 capabilities; |
cc87c47d | 1155 | char *bcc_ptr; |
254e55ed | 1156 | |
cc87c47d SP |
1157 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1158 | smb_buf = (struct smb_hdr *)pSMB; | |
1159 | ||
1160 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1161 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { | |
1162 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); | |
1163 | return -ENOSYS; | |
3534b850 | 1164 | } |
3979877e | 1165 | |
cc87c47d SP |
1166 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
1167 | capabilities |= CAP_EXTENDED_SECURITY; | |
1168 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
80a0e637 | 1169 | |
cc87c47d SP |
1170 | bcc_ptr = sess_data->iov[2].iov_base; |
1171 | /* unicode strings must be word aligned */ | |
1172 | if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) { | |
1173 | *bcc_ptr = 0; | |
1174 | bcc_ptr++; | |
3f618223 | 1175 | } |
cc87c47d | 1176 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); |
3f618223 | 1177 | |
cc87c47d SP |
1178 | sess_data->iov[2].iov_len = (long) bcc_ptr - |
1179 | (long) sess_data->iov[2].iov_base; | |
80a0e637 | 1180 | |
cc87c47d SP |
1181 | return 0; |
1182 | } | |
1183 | ||
1184 | static void | |
1185 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data); | |
1186 | ||
1187 | static void | |
1188 | sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data) | |
1189 | { | |
1190 | int rc; | |
1191 | struct smb_hdr *smb_buf; | |
1192 | SESSION_SETUP_ANDX *pSMB; | |
1193 | struct cifs_ses *ses = sess_data->ses; | |
1194 | __u16 bytes_remaining; | |
1195 | char *bcc_ptr; | |
1196 | u16 blob_len; | |
1197 | ||
1198 | cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n"); | |
5c234aa5 | 1199 | |
cc87c47d SP |
1200 | /* |
1201 | * if memory allocation is successful, caller of this function | |
1202 | * frees it. | |
1203 | */ | |
1204 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
1205 | if (!ses->ntlmssp) { | |
1206 | rc = -ENOMEM; | |
1207 | goto out; | |
d3686d54 | 1208 | } |
cc87c47d | 1209 | ses->ntlmssp->sesskey_per_smbsess = false; |
d3686d54 | 1210 | |
cc87c47d SP |
1211 | /* wct = 12 */ |
1212 | rc = sess_alloc_buffer(sess_data, 12); | |
1213 | if (rc) | |
1214 | goto out; | |
0b3cc858 | 1215 | |
cc87c47d | 1216 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
3979877e | 1217 | |
cc87c47d SP |
1218 | /* Build security blob before we assemble the request */ |
1219 | build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses); | |
1220 | sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
1221 | sess_data->iov[1].iov_base = pSMB->req.SecurityBlob; | |
1222 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
1223 | ||
1224 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
790fe579 | 1225 | if (rc) |
cc87c47d | 1226 | goto out; |
3979877e | 1227 | |
cc87c47d | 1228 | rc = sess_sendreceive(sess_data); |
3979877e | 1229 | |
cc87c47d SP |
1230 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1231 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
750d1151 | 1232 | |
cc87c47d SP |
1233 | /* If true, rc here is expected and not an error */ |
1234 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
1235 | smb_buf->Status.CifsError == | |
1236 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)) | |
1237 | rc = 0; | |
2442421b | 1238 | |
cc87c47d SP |
1239 | if (rc) |
1240 | goto out; | |
1241 | ||
1242 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); | |
1243 | ||
1244 | if (smb_buf->WordCount != 4) { | |
1245 | rc = -EIO; | |
1246 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1247 | goto out; | |
5e6e6232 | 1248 | } |
3979877e | 1249 | |
cc87c47d SP |
1250 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
1251 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
2442421b | 1252 | |
cc87c47d SP |
1253 | bytes_remaining = get_bcc(smb_buf); |
1254 | bcc_ptr = pByteArea(smb_buf); | |
b4d6fcf1 | 1255 | |
cc87c47d SP |
1256 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1257 | if (blob_len > bytes_remaining) { | |
1258 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1259 | blob_len); | |
1260 | rc = -EINVAL; | |
1261 | goto out; | |
1262 | } | |
0b3cc858 | 1263 | |
cc87c47d SP |
1264 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); |
1265 | out: | |
1266 | sess_free_buffer(sess_data); | |
1267 | ||
1268 | if (!rc) { | |
1269 | sess_data->func = sess_auth_rawntlmssp_authenticate; | |
1270 | return; | |
3979877e SF |
1271 | } |
1272 | ||
cc87c47d SP |
1273 | /* Else error. Cleanup */ |
1274 | kfree(ses->auth_key.response); | |
1275 | ses->auth_key.response = NULL; | |
1276 | kfree(ses->ntlmssp); | |
1277 | ses->ntlmssp = NULL; | |
2442421b | 1278 | |
cc87c47d SP |
1279 | sess_data->func = NULL; |
1280 | sess_data->result = rc; | |
1281 | } | |
3979877e | 1282 | |
cc87c47d SP |
1283 | static void |
1284 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data) | |
1285 | { | |
1286 | int rc; | |
1287 | struct smb_hdr *smb_buf; | |
1288 | SESSION_SETUP_ANDX *pSMB; | |
1289 | struct cifs_ses *ses = sess_data->ses; | |
1290 | __u16 bytes_remaining; | |
1291 | char *bcc_ptr; | |
b8da344b | 1292 | unsigned char *ntlmsspblob = NULL; |
cc87c47d | 1293 | u16 blob_len; |
3979877e | 1294 | |
cc87c47d | 1295 | cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n"); |
3979877e | 1296 | |
cc87c47d SP |
1297 | /* wct = 12 */ |
1298 | rc = sess_alloc_buffer(sess_data, 12); | |
1299 | if (rc) | |
1300 | goto out; | |
3979877e | 1301 | |
cc87c47d SP |
1302 | /* Build security blob before we assemble the request */ |
1303 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1304 | smb_buf = (struct smb_hdr *)pSMB; | |
b8da344b | 1305 | rc = build_ntlmssp_auth_blob(&ntlmsspblob, |
cc87c47d SP |
1306 | &blob_len, ses, sess_data->nls_cp); |
1307 | if (rc) | |
1308 | goto out_free_ntlmsspblob; | |
1309 | sess_data->iov[1].iov_len = blob_len; | |
1310 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1311 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
1312 | /* | |
1313 | * Make sure that we tell the server that we are using | |
1314 | * the uid that it just gave us back on the response | |
1315 | * (challenge) | |
1316 | */ | |
1317 | smb_buf->Uid = ses->Suid; | |
1318 | ||
1319 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
0b3cc858 | 1320 | if (rc) |
cc87c47d | 1321 | goto out_free_ntlmsspblob; |
0b3cc858 | 1322 | |
cc87c47d SP |
1323 | rc = sess_sendreceive(sess_data); |
1324 | if (rc) | |
1325 | goto out_free_ntlmsspblob; | |
1326 | ||
1327 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1328 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
583cf7af | 1329 | if (smb_buf->WordCount != 4) { |
3979877e | 1330 | rc = -EIO; |
f96637be | 1331 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
cc87c47d | 1332 | goto out_free_ntlmsspblob; |
3979877e | 1333 | } |
cc87c47d SP |
1334 | |
1335 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
f96637be | 1336 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
cc87c47d | 1337 | |
ee9bbf46 SP |
1338 | if (ses->Suid != smb_buf->Uid) { |
1339 | ses->Suid = smb_buf->Uid; | |
1340 | cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid); | |
1341 | } | |
1342 | ||
690c522f | 1343 | bytes_remaining = get_bcc(smb_buf); |
3979877e | 1344 | bcc_ptr = pByteArea(smb_buf); |
583cf7af SP |
1345 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1346 | if (blob_len > bytes_remaining) { | |
1347 | cifs_dbg(VFS, "bad security blob length %d\n", | |
cc87c47d | 1348 | blob_len); |
583cf7af | 1349 | rc = -EINVAL; |
cc87c47d | 1350 | goto out_free_ntlmsspblob; |
790fe579 | 1351 | } |
583cf7af SP |
1352 | bcc_ptr += blob_len; |
1353 | bytes_remaining -= blob_len; | |
3979877e | 1354 | |
cc87c47d | 1355 | |
3979877e | 1356 | /* BB check if Unicode and decode strings */ |
fcda7f45 JL |
1357 | if (bytes_remaining == 0) { |
1358 | /* no string area to decode, do nothing */ | |
1359 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 JL |
1360 | /* unicode string area must be word-aligned */ |
1361 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1362 | ++bcc_ptr; | |
1363 | --bytes_remaining; | |
1364 | } | |
cc87c47d SP |
1365 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, |
1366 | sess_data->nls_cp); | |
27b87fe5 | 1367 | } else { |
cc87c47d SP |
1368 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, |
1369 | sess_data->nls_cp); | |
27b87fe5 | 1370 | } |
50c2f753 | 1371 | |
cc87c47d | 1372 | out_free_ntlmsspblob: |
2b149f11 | 1373 | kfree(ntlmsspblob); |
cc87c47d SP |
1374 | out: |
1375 | sess_free_buffer(sess_data); | |
d4e63bd6 | 1376 | |
cc87c47d SP |
1377 | if (!rc) |
1378 | rc = sess_establish_session(sess_data); | |
d4e63bd6 | 1379 | |
cc87c47d | 1380 | /* Cleanup */ |
d4e63bd6 SP |
1381 | kfree(ses->auth_key.response); |
1382 | ses->auth_key.response = NULL; | |
1383 | kfree(ses->ntlmssp); | |
cc87c47d | 1384 | ses->ntlmssp = NULL; |
d4e63bd6 | 1385 | |
cc87c47d SP |
1386 | sess_data->func = NULL; |
1387 | sess_data->result = rc; | |
1388 | } | |
80a0e637 | 1389 | |
27924075 | 1390 | static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data) |
cc87c47d SP |
1391 | { |
1392 | int type; | |
1393 | ||
ef65aaed | 1394 | type = cifs_select_sectype(ses->server, ses->sectype); |
cc87c47d SP |
1395 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1396 | if (type == Unspecified) { | |
1397 | cifs_dbg(VFS, | |
1398 | "Unable to select appropriate authentication method!"); | |
1399 | return -EINVAL; | |
1400 | } | |
1401 | ||
1402 | switch (type) { | |
1403 | case LANMAN: | |
1404 | /* LANMAN and plaintext are less secure and off by default. | |
1405 | * So we make this explicitly be turned on in kconfig (in the | |
1406 | * build) and turned on at runtime (changed from the default) | |
1407 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
1408 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
1409 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1410 | sess_data->func = sess_auth_lanman; | |
1411 | break; | |
1412 | #else | |
1413 | return -EOPNOTSUPP; | |
1414 | #endif | |
1415 | case NTLM: | |
1416 | sess_data->func = sess_auth_ntlm; | |
1417 | break; | |
1418 | case NTLMv2: | |
1419 | sess_data->func = sess_auth_ntlmv2; | |
1420 | break; | |
1421 | case Kerberos: | |
1422 | #ifdef CONFIG_CIFS_UPCALL | |
1423 | sess_data->func = sess_auth_kerberos; | |
1424 | break; | |
1425 | #else | |
1426 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1427 | return -ENOSYS; | |
1428 | break; | |
1429 | #endif /* CONFIG_CIFS_UPCALL */ | |
1430 | case RawNTLMSSP: | |
1431 | sess_data->func = sess_auth_rawntlmssp_negotiate; | |
1432 | break; | |
1433 | default: | |
1434 | cifs_dbg(VFS, "secType %d not supported!\n", type); | |
1435 | return -ENOSYS; | |
1436 | } | |
1437 | ||
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, | |
1442 | const struct nls_table *nls_cp) | |
1443 | { | |
1444 | int rc = 0; | |
1445 | struct sess_data *sess_data; | |
1446 | ||
1447 | if (ses == NULL) { | |
1448 | WARN(1, "%s: ses == NULL!", __func__); | |
1449 | return -EINVAL; | |
1450 | } | |
1451 | ||
1452 | sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL); | |
1453 | if (!sess_data) | |
1454 | return -ENOMEM; | |
1455 | ||
1456 | rc = select_sec(ses, sess_data); | |
1457 | if (rc) | |
1458 | goto out; | |
1459 | ||
1460 | sess_data->xid = xid; | |
1461 | sess_data->ses = ses; | |
1462 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1463 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
1464 | ||
1465 | while (sess_data->func) | |
1466 | sess_data->func(sess_data); | |
1467 | ||
1468 | /* Store result before we free sess_data */ | |
80a0e637 | 1469 | rc = sess_data->result; |
cc87c47d SP |
1470 | |
1471 | out: | |
80a0e637 SP |
1472 | kfree(sess_data); |
1473 | return rc; | |
3979877e | 1474 | } |