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; |
340625e6 | 162 | int len; |
3979877e SF |
163 | |
164 | /* copy user */ | |
165 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 | 166 | /* copy user */ |
de47a417 | 167 | if (ses->user_name != NULL) { |
340625e6 RS |
168 | len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); |
169 | if (WARN_ON_ONCE(len < 0)) | |
170 | len = CIFS_MAX_USERNAME_LEN - 1; | |
171 | bcc_ptr += len; | |
de47a417 | 172 | } |
8727c8a8 | 173 | /* else null user mount */ |
3979877e | 174 | *bcc_ptr = 0; |
790fe579 | 175 | bcc_ptr++; /* account for null termination */ |
3979877e | 176 | |
790fe579 | 177 | /* copy domain */ |
790fe579 | 178 | if (ses->domainName != NULL) { |
340625e6 RS |
179 | len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); |
180 | if (WARN_ON_ONCE(len < 0)) | |
181 | len = CIFS_MAX_DOMAINNAME_LEN - 1; | |
182 | bcc_ptr += len; | |
790fe579 | 183 | } /* else we will send a null domain name |
6e659c63 | 184 | so the server will default to its own domain */ |
3979877e SF |
185 | *bcc_ptr = 0; |
186 | bcc_ptr++; | |
187 | ||
188 | /* BB check for overflow here */ | |
189 | ||
190 | strcpy(bcc_ptr, "Linux version "); | |
191 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
192 | strcpy(bcc_ptr, init_utsname()->release); |
193 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
194 | |
195 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
196 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
197 | ||
790fe579 | 198 | *pbcc_area = bcc_ptr; |
3979877e SF |
199 | } |
200 | ||
59140797 | 201 | static void |
96daf2b0 | 202 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses, |
59140797 | 203 | const struct nls_table *nls_cp) |
3979877e | 204 | { |
59140797 | 205 | int len; |
790fe579 | 206 | char *data = *pbcc_area; |
3979877e | 207 | |
f96637be | 208 | cifs_dbg(FYI, "bleft %d\n", bleft); |
3979877e | 209 | |
26f57364 | 210 | kfree(ses->serverOS); |
acbbb76a | 211 | ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 212 | cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS); |
59140797 JL |
213 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
214 | data += len; | |
215 | bleft -= len; | |
216 | if (bleft <= 0) | |
217 | return; | |
3979877e | 218 | |
26f57364 | 219 | kfree(ses->serverNOS); |
acbbb76a | 220 | ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 221 | cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS); |
59140797 JL |
222 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
223 | data += len; | |
224 | bleft -= len; | |
225 | if (bleft <= 0) | |
226 | return; | |
790fe579 | 227 | |
26f57364 | 228 | kfree(ses->serverDomain); |
acbbb76a | 229 | ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 230 | cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain); |
790fe579 | 231 | |
59140797 | 232 | return; |
3979877e SF |
233 | } |
234 | ||
7d066459 JL |
235 | static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, |
236 | struct cifs_ses *ses, | |
237 | const struct nls_table *nls_cp) | |
3979877e | 238 | { |
3979877e | 239 | int len; |
790fe579 | 240 | char *bcc_ptr = *pbcc_area; |
3979877e | 241 | |
f96637be | 242 | cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft); |
50c2f753 | 243 | |
3979877e | 244 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 245 | if (len >= bleft) |
7d066459 | 246 | return; |
50c2f753 | 247 | |
26f57364 | 248 | kfree(ses->serverOS); |
3979877e | 249 | |
340625e6 | 250 | ses->serverOS = kmalloc(len + 1, GFP_KERNEL); |
27b7edcf | 251 | if (ses->serverOS) { |
340625e6 RS |
252 | memcpy(ses->serverOS, bcc_ptr, len); |
253 | ses->serverOS[len] = 0; | |
27b7edcf NJ |
254 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) |
255 | cifs_dbg(FYI, "OS/2 server\n"); | |
256 | } | |
3979877e SF |
257 | |
258 | bcc_ptr += len + 1; | |
259 | bleft -= len + 1; | |
260 | ||
261 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 262 | if (len >= bleft) |
7d066459 | 263 | return; |
3979877e | 264 | |
26f57364 | 265 | kfree(ses->serverNOS); |
3979877e | 266 | |
340625e6 RS |
267 | ses->serverNOS = kmalloc(len + 1, GFP_KERNEL); |
268 | if (ses->serverNOS) { | |
269 | memcpy(ses->serverNOS, bcc_ptr, len); | |
270 | ses->serverNOS[len] = 0; | |
271 | } | |
3979877e SF |
272 | |
273 | bcc_ptr += len + 1; | |
274 | bleft -= len + 1; | |
275 | ||
790fe579 SF |
276 | len = strnlen(bcc_ptr, bleft); |
277 | if (len > bleft) | |
7d066459 | 278 | return; |
3979877e | 279 | |
9ac00b7d SF |
280 | /* No domain field in LANMAN case. Domain is |
281 | returned by old servers in the SMB negprot response */ | |
282 | /* BB For newer servers which do not support Unicode, | |
283 | but thus do return domain here we could add parsing | |
284 | for it later, but it is not very important */ | |
f96637be | 285 | cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); |
3979877e SF |
286 | } |
287 | ||
5478f9ba | 288 | int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
96daf2b0 | 289 | struct cifs_ses *ses) |
0b3cc858 | 290 | { |
2b149f11 SP |
291 | unsigned int tioffset; /* challenge message target info area */ |
292 | unsigned int tilen; /* challenge message target info area length */ | |
293 | ||
0b3cc858 SF |
294 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; |
295 | ||
296 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
f96637be | 297 | cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len); |
0b3cc858 SF |
298 | return -EINVAL; |
299 | } | |
300 | ||
301 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
f96637be JP |
302 | cifs_dbg(VFS, "blob signature incorrect %s\n", |
303 | pblob->Signature); | |
0b3cc858 SF |
304 | return -EINVAL; |
305 | } | |
306 | if (pblob->MessageType != NtLmChallenge) { | |
f96637be JP |
307 | cifs_dbg(VFS, "Incorrect message type %d\n", |
308 | pblob->MessageType); | |
0b3cc858 SF |
309 | return -EINVAL; |
310 | } | |
311 | ||
d3686d54 | 312 | memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
0b3cc858 SF |
313 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ |
314 | /* In particular we can examine sign flags */ | |
315 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
316 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
d3686d54 | 317 | ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); |
5443d130 SF |
318 | tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset); |
319 | tilen = le16_to_cpu(pblob->TargetInfoArray.Length); | |
4991a5fa | 320 | if (tioffset > blob_len || tioffset + tilen > blob_len) { |
f96637be JP |
321 | cifs_dbg(VFS, "tioffset + tilen too high %u + %u", |
322 | tioffset, tilen); | |
4991a5fa DC |
323 | return -EINVAL; |
324 | } | |
d3686d54 | 325 | if (tilen) { |
f7f7c185 SMP |
326 | ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen, |
327 | GFP_KERNEL); | |
d3686d54 | 328 | if (!ses->auth_key.response) { |
f96637be | 329 | cifs_dbg(VFS, "Challenge target info alloc failure"); |
2b149f11 SP |
330 | return -ENOMEM; |
331 | } | |
d3686d54 | 332 | ses->auth_key.len = tilen; |
2b149f11 SP |
333 | } |
334 | ||
0b3cc858 SF |
335 | return 0; |
336 | } | |
337 | ||
0b3cc858 SF |
338 | /* BB Move to ntlmssp.c eventually */ |
339 | ||
340 | /* We do not malloc the blob, it is passed in pbuffer, because | |
341 | it is fixed size, and small, making this approach cleaner */ | |
5478f9ba | 342 | void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, |
96daf2b0 | 343 | struct cifs_ses *ses) |
0b3cc858 SF |
344 | { |
345 | NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; | |
346 | __u32 flags; | |
347 | ||
df8fbc24 | 348 | memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); |
0b3cc858 SF |
349 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
350 | sec_blob->MessageType = NtLmNegotiate; | |
351 | ||
352 | /* BB is NTLMV2 session security format easier to use here? */ | |
353 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
354 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
355 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
356 | NTLMSSP_NEGOTIATE_SEAL; | |
357 | if (ses->server->sign) | |
745e507a | 358 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
359 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
360 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 361 | |
df8fbc24 | 362 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
363 | |
364 | sec_blob->WorkstationName.BufferOffset = 0; | |
365 | sec_blob->WorkstationName.Length = 0; | |
366 | sec_blob->WorkstationName.MaximumLength = 0; | |
367 | ||
368 | /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */ | |
369 | sec_blob->DomainName.BufferOffset = 0; | |
370 | sec_blob->DomainName.Length = 0; | |
371 | sec_blob->DomainName.MaximumLength = 0; | |
372 | } | |
373 | ||
b8da344b JM |
374 | static int size_of_ntlmssp_blob(struct cifs_ses *ses) |
375 | { | |
376 | int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len | |
377 | - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2; | |
378 | ||
379 | if (ses->domainName) | |
380 | sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); | |
381 | else | |
382 | sz += 2; | |
383 | ||
384 | if (ses->user_name) | |
385 | sz += 2 * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); | |
386 | else | |
387 | sz += 2; | |
388 | ||
389 | return sz; | |
390 | } | |
391 | ||
392 | int build_ntlmssp_auth_blob(unsigned char **pbuffer, | |
89f150f4 | 393 | u16 *buflen, |
96daf2b0 | 394 | struct cifs_ses *ses, |
2b149f11 | 395 | const struct nls_table *nls_cp) |
0b3cc858 | 396 | { |
2b149f11 | 397 | int rc; |
b8da344b | 398 | AUTHENTICATE_MESSAGE *sec_blob; |
0b3cc858 SF |
399 | __u32 flags; |
400 | unsigned char *tmp; | |
0b3cc858 | 401 | |
b8da344b JM |
402 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
403 | if (rc) { | |
404 | cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc); | |
405 | *buflen = 0; | |
406 | goto setup_ntlmv2_ret; | |
407 | } | |
408 | *pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL); | |
126c97f4 NMG |
409 | if (!*pbuffer) { |
410 | rc = -ENOMEM; | |
411 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
412 | *buflen = 0; | |
413 | goto setup_ntlmv2_ret; | |
414 | } | |
b8da344b JM |
415 | sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer; |
416 | ||
0b3cc858 SF |
417 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
418 | sec_blob->MessageType = NtLmAuthenticate; | |
419 | ||
420 | flags = NTLMSSP_NEGOTIATE_56 | | |
421 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
422 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
423 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
424 | NTLMSSP_NEGOTIATE_SEAL; | |
425 | if (ses->server->sign) | |
0b3cc858 | 426 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
427 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
428 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 429 | |
b8da344b | 430 | tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); |
df8fbc24 | 431 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
432 | |
433 | sec_blob->LmChallengeResponse.BufferOffset = | |
434 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
435 | sec_blob->LmChallengeResponse.Length = 0; | |
436 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
437 | ||
b8da344b JM |
438 | sec_blob->NtChallengeResponse.BufferOffset = |
439 | cpu_to_le32(tmp - *pbuffer); | |
cfda35d9 | 440 | if (ses->user_name != NULL) { |
cfda35d9 SM |
441 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
442 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
443 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
444 | ||
445 | sec_blob->NtChallengeResponse.Length = | |
446 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
447 | sec_blob->NtChallengeResponse.MaximumLength = | |
448 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
449 | } else { | |
450 | /* | |
451 | * don't send an NT Response for anonymous access | |
452 | */ | |
453 | sec_blob->NtChallengeResponse.Length = 0; | |
454 | sec_blob->NtChallengeResponse.MaximumLength = 0; | |
2b149f11 | 455 | } |
0b3cc858 SF |
456 | |
457 | if (ses->domainName == NULL) { | |
b8da344b | 458 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
459 | sec_blob->DomainName.Length = 0; |
460 | sec_blob->DomainName.MaximumLength = 0; | |
461 | tmp += 2; | |
462 | } else { | |
463 | int len; | |
acbbb76a | 464 | len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName, |
202d772b | 465 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0b3cc858 | 466 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 467 | sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
468 | sec_blob->DomainName.Length = cpu_to_le16(len); |
469 | sec_blob->DomainName.MaximumLength = cpu_to_le16(len); | |
470 | tmp += len; | |
471 | } | |
472 | ||
8727c8a8 | 473 | if (ses->user_name == NULL) { |
b8da344b | 474 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
475 | sec_blob->UserName.Length = 0; |
476 | sec_blob->UserName.MaximumLength = 0; | |
477 | tmp += 2; | |
478 | } else { | |
479 | int len; | |
acbbb76a | 480 | len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name, |
8c3a2b4c | 481 | CIFS_MAX_USERNAME_LEN, nls_cp); |
0b3cc858 | 482 | len *= 2; /* unicode is 2 bytes each */ |
b8da344b | 483 | sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
484 | sec_blob->UserName.Length = cpu_to_le16(len); |
485 | sec_blob->UserName.MaximumLength = cpu_to_le16(len); | |
486 | tmp += len; | |
487 | } | |
488 | ||
b8da344b | 489 | sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
0b3cc858 SF |
490 | sec_blob->WorkstationName.Length = 0; |
491 | sec_blob->WorkstationName.MaximumLength = 0; | |
492 | tmp += 2; | |
493 | ||
df8fbc24 SP |
494 | if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || |
495 | (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) | |
496 | && !calc_seckey(ses)) { | |
d3686d54 | 497 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
b8da344b | 498 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
499 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); |
500 | sec_blob->SessionKey.MaximumLength = | |
501 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
502 | tmp += CIFS_CPHTXT_SIZE; | |
503 | } else { | |
b8da344b | 504 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
505 | sec_blob->SessionKey.Length = 0; |
506 | sec_blob->SessionKey.MaximumLength = 0; | |
507 | } | |
2b149f11 | 508 | |
b8da344b | 509 | *buflen = tmp - *pbuffer; |
2b149f11 | 510 | setup_ntlmv2_ret: |
89f150f4 | 511 | return rc; |
0b3cc858 | 512 | } |
0b3cc858 | 513 | |
3f618223 | 514 | enum securityEnum |
ef65aaed | 515 | cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
3f618223 JL |
516 | { |
517 | switch (server->negflavor) { | |
518 | case CIFS_NEGFLAVOR_EXTENDED: | |
519 | switch (requested) { | |
520 | case Kerberos: | |
521 | case RawNTLMSSP: | |
522 | return requested; | |
523 | case Unspecified: | |
524 | if (server->sec_ntlmssp && | |
525 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
526 | return RawNTLMSSP; | |
527 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
528 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
529 | return Kerberos; | |
530 | /* Fallthrough */ | |
531 | default: | |
532 | return Unspecified; | |
533 | } | |
534 | case CIFS_NEGFLAVOR_UNENCAP: | |
535 | switch (requested) { | |
536 | case NTLM: | |
537 | case NTLMv2: | |
538 | return requested; | |
539 | case Unspecified: | |
540 | if (global_secflags & CIFSSEC_MAY_NTLMV2) | |
541 | return NTLMv2; | |
542 | if (global_secflags & CIFSSEC_MAY_NTLM) | |
543 | return NTLM; | |
3f618223 | 544 | default: |
dde2356c | 545 | break; |
3f618223 | 546 | } |
07fa6010 | 547 | /* Fallthrough - to attempt LANMAN authentication next */ |
3f618223 JL |
548 | case CIFS_NEGFLAVOR_LANMAN: |
549 | switch (requested) { | |
550 | case LANMAN: | |
551 | return requested; | |
552 | case Unspecified: | |
553 | if (global_secflags & CIFSSEC_MAY_LANMAN) | |
554 | return LANMAN; | |
555 | /* Fallthrough */ | |
556 | default: | |
557 | return Unspecified; | |
558 | } | |
559 | default: | |
560 | return Unspecified; | |
561 | } | |
562 | } | |
563 | ||
80a0e637 SP |
564 | struct sess_data { |
565 | unsigned int xid; | |
566 | struct cifs_ses *ses; | |
567 | struct nls_table *nls_cp; | |
568 | void (*func)(struct sess_data *); | |
569 | int result; | |
570 | ||
571 | /* we will send the SMB in three pieces: | |
572 | * a fixed length beginning part, an optional | |
573 | * SPNEGO blob (which can be zero length), and a | |
574 | * last part which will include the strings | |
575 | * and rest of bcc area. This allows us to avoid | |
576 | * a large buffer 17K allocation | |
577 | */ | |
578 | int buf0_type; | |
579 | struct kvec iov[3]; | |
580 | }; | |
581 | ||
582 | static int | |
583 | sess_alloc_buffer(struct sess_data *sess_data, int wct) | |
584 | { | |
585 | int rc; | |
586 | struct cifs_ses *ses = sess_data->ses; | |
587 | struct smb_hdr *smb_buf; | |
588 | ||
589 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
590 | (void **)&smb_buf); | |
591 | ||
592 | if (rc) | |
593 | return rc; | |
594 | ||
595 | sess_data->iov[0].iov_base = (char *)smb_buf; | |
596 | sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; | |
597 | /* | |
598 | * This variable will be used to clear the buffer | |
599 | * allocated above in case of any error in the calling function. | |
600 | */ | |
601 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
602 | ||
603 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
604 | sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL); | |
605 | if (!sess_data->iov[2].iov_base) { | |
606 | rc = -ENOMEM; | |
607 | goto out_free_smb_buf; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | ||
612 | out_free_smb_buf: | |
613 | kfree(smb_buf); | |
614 | sess_data->iov[0].iov_base = NULL; | |
615 | sess_data->iov[0].iov_len = 0; | |
616 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
617 | return rc; | |
618 | } | |
619 | ||
620 | static void | |
621 | sess_free_buffer(struct sess_data *sess_data) | |
622 | { | |
623 | ||
624 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
625 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
626 | kfree(sess_data->iov[2].iov_base); | |
627 | } | |
628 | ||
629 | static int | |
630 | sess_establish_session(struct sess_data *sess_data) | |
631 | { | |
632 | struct cifs_ses *ses = sess_data->ses; | |
633 | ||
634 | mutex_lock(&ses->server->srv_mutex); | |
635 | if (!ses->server->session_estab) { | |
636 | if (ses->server->sign) { | |
637 | ses->server->session_key.response = | |
638 | kmemdup(ses->auth_key.response, | |
639 | ses->auth_key.len, GFP_KERNEL); | |
640 | if (!ses->server->session_key.response) { | |
641 | mutex_unlock(&ses->server->srv_mutex); | |
642 | return -ENOMEM; | |
643 | } | |
644 | ses->server->session_key.len = | |
645 | ses->auth_key.len; | |
646 | } | |
647 | ses->server->sequence_number = 0x2; | |
648 | ses->server->session_estab = true; | |
649 | } | |
650 | mutex_unlock(&ses->server->srv_mutex); | |
651 | ||
652 | cifs_dbg(FYI, "CIFS session established successfully\n"); | |
653 | spin_lock(&GlobalMid_Lock); | |
654 | ses->status = CifsGood; | |
655 | ses->need_reconnect = false; | |
656 | spin_unlock(&GlobalMid_Lock); | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static int | |
662 | sess_sendreceive(struct sess_data *sess_data) | |
663 | { | |
664 | int rc; | |
665 | struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base; | |
666 | __u16 count; | |
da502f7d | 667 | struct kvec rsp_iov = { NULL, 0 }; |
80a0e637 SP |
668 | |
669 | count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len; | |
670 | smb_buf->smb_buf_length = | |
671 | cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count); | |
672 | put_bcc(count, smb_buf); | |
673 | ||
674 | rc = SendReceive2(sess_data->xid, sess_data->ses, | |
675 | sess_data->iov, 3 /* num_iovecs */, | |
676 | &sess_data->buf0_type, | |
da502f7d PS |
677 | CIFS_LOG_ERROR, &rsp_iov); |
678 | cifs_small_buf_release(sess_data->iov[0].iov_base); | |
679 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
80a0e637 SP |
680 | |
681 | return rc; | |
682 | } | |
683 | ||
684 | /* | |
685 | * LANMAN and plaintext are less secure and off by default. | |
686 | * So we make this explicitly be turned on in kconfig (in the | |
687 | * build) and turned on at runtime (changed from the default) | |
688 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
689 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 | |
690 | */ | |
691 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
692 | static void | |
693 | sess_auth_lanman(struct sess_data *sess_data) | |
694 | { | |
695 | int rc = 0; | |
696 | struct smb_hdr *smb_buf; | |
697 | SESSION_SETUP_ANDX *pSMB; | |
698 | char *bcc_ptr; | |
699 | struct cifs_ses *ses = sess_data->ses; | |
700 | char lnm_session_key[CIFS_AUTH_RESP_SIZE]; | |
701 | __u32 capabilities; | |
702 | __u16 bytes_remaining; | |
703 | ||
704 | /* lanman 2 style sessionsetup */ | |
705 | /* wct = 10 */ | |
706 | rc = sess_alloc_buffer(sess_data, 10); | |
707 | if (rc) | |
708 | goto out; | |
709 | ||
710 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
711 | bcc_ptr = sess_data->iov[2].iov_base; | |
712 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
713 | ||
714 | pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; | |
715 | ||
fa8f3a35 SM |
716 | if (ses->user_name != NULL) { |
717 | /* no capabilities flags in old lanman negotiation */ | |
718 | pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
80a0e637 | 719 | |
fa8f3a35 SM |
720 | /* Calculate hash with password and copy into bcc_ptr. |
721 | * Encryption Key (stored as in cryptkey) gets used if the | |
722 | * security mode bit in Negottiate Protocol response states | |
723 | * to use challenge/response method (i.e. Password bit is 1). | |
724 | */ | |
725 | rc = calc_lanman_hash(ses->password, ses->server->cryptkey, | |
726 | ses->server->sec_mode & SECMODE_PW_ENCRYPT ? | |
727 | true : false, lnm_session_key); | |
a6b6befb LB |
728 | if (rc) |
729 | goto out; | |
80a0e637 | 730 | |
fa8f3a35 SM |
731 | memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); |
732 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
733 | } else { | |
734 | pSMB->old_req.PasswordLength = 0; | |
735 | } | |
80a0e637 SP |
736 | |
737 | /* | |
738 | * can not sign if LANMAN negotiated so no need | |
739 | * to calculate signing key? but what if server | |
740 | * changed to do higher than lanman dialect and | |
741 | * we reconnected would we ever calc signing_key? | |
742 | */ | |
743 | ||
744 | cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n"); | |
745 | /* Unicode not allowed for LANMAN dialects */ | |
746 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
747 | ||
748 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
749 | (long) sess_data->iov[2].iov_base; | |
750 | ||
751 | rc = sess_sendreceive(sess_data); | |
752 | if (rc) | |
753 | goto out; | |
754 | ||
755 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
756 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
757 | ||
758 | /* lanman response has a word count of 3 */ | |
759 | if (smb_buf->WordCount != 3) { | |
760 | rc = -EIO; | |
761 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
762 | goto out; | |
763 | } | |
764 | ||
765 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
766 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
767 | ||
768 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
769 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
770 | ||
771 | bytes_remaining = get_bcc(smb_buf); | |
772 | bcc_ptr = pByteArea(smb_buf); | |
773 | ||
774 | /* BB check if Unicode and decode strings */ | |
775 | if (bytes_remaining == 0) { | |
776 | /* no string area to decode, do nothing */ | |
777 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
778 | /* unicode string area must be word-aligned */ | |
779 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
780 | ++bcc_ptr; | |
781 | --bytes_remaining; | |
782 | } | |
783 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
784 | sess_data->nls_cp); | |
785 | } else { | |
786 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
787 | sess_data->nls_cp); | |
788 | } | |
789 | ||
790 | rc = sess_establish_session(sess_data); | |
791 | out: | |
792 | sess_data->result = rc; | |
793 | sess_data->func = NULL; | |
794 | sess_free_buffer(sess_data); | |
795 | } | |
796 | ||
80a0e637 SP |
797 | #endif |
798 | ||
583cf7af SP |
799 | static void |
800 | sess_auth_ntlm(struct sess_data *sess_data) | |
801 | { | |
802 | int rc = 0; | |
803 | struct smb_hdr *smb_buf; | |
804 | SESSION_SETUP_ANDX *pSMB; | |
805 | char *bcc_ptr; | |
806 | struct cifs_ses *ses = sess_data->ses; | |
807 | __u32 capabilities; | |
808 | __u16 bytes_remaining; | |
809 | ||
810 | /* old style NTLM sessionsetup */ | |
811 | /* wct = 13 */ | |
812 | rc = sess_alloc_buffer(sess_data, 13); | |
813 | if (rc) | |
814 | goto out; | |
815 | ||
816 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
817 | bcc_ptr = sess_data->iov[2].iov_base; | |
818 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
819 | ||
820 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
777f69b8 SM |
821 | if (ses->user_name != NULL) { |
822 | pSMB->req_no_secext.CaseInsensitivePasswordLength = | |
823 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
824 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
825 | cpu_to_le16(CIFS_AUTH_RESP_SIZE); | |
826 | ||
827 | /* calculate ntlm response and session key */ | |
828 | rc = setup_ntlm_response(ses, sess_data->nls_cp); | |
829 | if (rc) { | |
830 | cifs_dbg(VFS, "Error %d during NTLM authentication\n", | |
831 | rc); | |
832 | goto out; | |
833 | } | |
583cf7af | 834 | |
777f69b8 SM |
835 | /* copy ntlm response */ |
836 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
837 | CIFS_AUTH_RESP_SIZE); | |
838 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
839 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, | |
840 | CIFS_AUTH_RESP_SIZE); | |
841 | bcc_ptr += CIFS_AUTH_RESP_SIZE; | |
842 | } else { | |
843 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
844 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
845 | } | |
583cf7af SP |
846 | |
847 | if (ses->capabilities & CAP_UNICODE) { | |
848 | /* unicode strings must be word aligned */ | |
849 | if (sess_data->iov[0].iov_len % 2) { | |
850 | *bcc_ptr = 0; | |
851 | bcc_ptr++; | |
852 | } | |
853 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
854 | } else { | |
855 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
856 | } | |
857 | ||
858 | ||
859 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
860 | (long) sess_data->iov[2].iov_base; | |
861 | ||
862 | rc = sess_sendreceive(sess_data); | |
863 | if (rc) | |
864 | goto out; | |
865 | ||
866 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
867 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
868 | ||
869 | if (smb_buf->WordCount != 3) { | |
870 | rc = -EIO; | |
871 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
872 | goto out; | |
873 | } | |
874 | ||
875 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
876 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
877 | ||
878 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
879 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
880 | ||
881 | bytes_remaining = get_bcc(smb_buf); | |
882 | bcc_ptr = pByteArea(smb_buf); | |
883 | ||
884 | /* BB check if Unicode and decode strings */ | |
885 | if (bytes_remaining == 0) { | |
886 | /* no string area to decode, do nothing */ | |
887 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
888 | /* unicode string area must be word-aligned */ | |
889 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
890 | ++bcc_ptr; | |
891 | --bytes_remaining; | |
892 | } | |
893 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
894 | sess_data->nls_cp); | |
895 | } else { | |
896 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
897 | sess_data->nls_cp); | |
898 | } | |
899 | ||
900 | rc = sess_establish_session(sess_data); | |
901 | out: | |
902 | sess_data->result = rc; | |
903 | sess_data->func = NULL; | |
904 | sess_free_buffer(sess_data); | |
905 | kfree(ses->auth_key.response); | |
906 | ses->auth_key.response = NULL; | |
907 | } | |
908 | ||
909 | static void | |
910 | sess_auth_ntlmv2(struct sess_data *sess_data) | |
911 | { | |
912 | int rc = 0; | |
913 | struct smb_hdr *smb_buf; | |
914 | SESSION_SETUP_ANDX *pSMB; | |
915 | char *bcc_ptr; | |
916 | struct cifs_ses *ses = sess_data->ses; | |
917 | __u32 capabilities; | |
918 | __u16 bytes_remaining; | |
919 | ||
920 | /* old style NTLM sessionsetup */ | |
921 | /* wct = 13 */ | |
922 | rc = sess_alloc_buffer(sess_data, 13); | |
923 | if (rc) | |
924 | goto out; | |
925 | ||
926 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
927 | bcc_ptr = sess_data->iov[2].iov_base; | |
928 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
929 | ||
930 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
931 | ||
932 | /* LM2 password would be here if we supported it */ | |
933 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
934 | ||
1a967d6c SM |
935 | if (ses->user_name != NULL) { |
936 | /* calculate nlmv2 response and session key */ | |
937 | rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp); | |
938 | if (rc) { | |
939 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc); | |
940 | goto out; | |
941 | } | |
583cf7af | 942 | |
1a967d6c SM |
943 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
944 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
945 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
583cf7af | 946 | |
1a967d6c SM |
947 | /* set case sensitive password length after tilen may get |
948 | * assigned, tilen is 0 otherwise. | |
949 | */ | |
950 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
951 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
952 | } else { | |
953 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
954 | } | |
583cf7af SP |
955 | |
956 | if (ses->capabilities & CAP_UNICODE) { | |
957 | if (sess_data->iov[0].iov_len % 2) { | |
958 | *bcc_ptr = 0; | |
959 | bcc_ptr++; | |
960 | } | |
961 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
962 | } else { | |
963 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
964 | } | |
965 | ||
966 | ||
967 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
968 | (long) sess_data->iov[2].iov_base; | |
969 | ||
970 | rc = sess_sendreceive(sess_data); | |
971 | if (rc) | |
972 | goto out; | |
973 | ||
974 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
975 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
976 | ||
977 | if (smb_buf->WordCount != 3) { | |
978 | rc = -EIO; | |
979 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
980 | goto out; | |
981 | } | |
982 | ||
983 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
984 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
985 | ||
986 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
987 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
988 | ||
989 | bytes_remaining = get_bcc(smb_buf); | |
990 | bcc_ptr = pByteArea(smb_buf); | |
991 | ||
992 | /* BB check if Unicode and decode strings */ | |
993 | if (bytes_remaining == 0) { | |
994 | /* no string area to decode, do nothing */ | |
995 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
996 | /* unicode string area must be word-aligned */ | |
997 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
998 | ++bcc_ptr; | |
999 | --bytes_remaining; | |
1000 | } | |
1001 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1002 | sess_data->nls_cp); | |
1003 | } else { | |
1004 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1005 | sess_data->nls_cp); | |
1006 | } | |
1007 | ||
1008 | rc = sess_establish_session(sess_data); | |
1009 | out: | |
1010 | sess_data->result = rc; | |
1011 | sess_data->func = NULL; | |
1012 | sess_free_buffer(sess_data); | |
1013 | kfree(ses->auth_key.response); | |
1014 | ses->auth_key.response = NULL; | |
1015 | } | |
1016 | ||
ee03c646 SP |
1017 | #ifdef CONFIG_CIFS_UPCALL |
1018 | static void | |
1019 | sess_auth_kerberos(struct sess_data *sess_data) | |
1020 | { | |
1021 | int rc = 0; | |
1022 | struct smb_hdr *smb_buf; | |
1023 | SESSION_SETUP_ANDX *pSMB; | |
1024 | char *bcc_ptr; | |
1025 | struct cifs_ses *ses = sess_data->ses; | |
1026 | __u32 capabilities; | |
1027 | __u16 bytes_remaining; | |
1028 | struct key *spnego_key = NULL; | |
1029 | struct cifs_spnego_msg *msg; | |
1030 | u16 blob_len; | |
1031 | ||
1032 | /* extended security */ | |
1033 | /* wct = 12 */ | |
1034 | rc = sess_alloc_buffer(sess_data, 12); | |
1035 | if (rc) | |
1036 | goto out; | |
1037 | ||
1038 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1039 | bcc_ptr = sess_data->iov[2].iov_base; | |
1040 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1041 | ||
1042 | spnego_key = cifs_get_spnego_key(ses); | |
1043 | if (IS_ERR(spnego_key)) { | |
1044 | rc = PTR_ERR(spnego_key); | |
1045 | spnego_key = NULL; | |
1046 | goto out; | |
1047 | } | |
1048 | ||
146aa8b1 | 1049 | msg = spnego_key->payload.data[0]; |
ee03c646 SP |
1050 | /* |
1051 | * check version field to make sure that cifs.upcall is | |
1052 | * sending us a response in an expected form | |
1053 | */ | |
1054 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
1055 | cifs_dbg(VFS, | |
1056 | "incorrect version of cifs.upcall (expected %d but got %d)", | |
1057 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
1058 | rc = -EKEYREJECTED; | |
1059 | goto out_put_spnego_key; | |
1060 | } | |
1061 | ||
1062 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
1063 | GFP_KERNEL); | |
1064 | if (!ses->auth_key.response) { | |
1065 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory", | |
1066 | msg->sesskey_len); | |
1067 | rc = -ENOMEM; | |
1068 | goto out_put_spnego_key; | |
1069 | } | |
1070 | ses->auth_key.len = msg->sesskey_len; | |
1071 | ||
1072 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
1073 | capabilities |= CAP_EXTENDED_SECURITY; | |
1074 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
1075 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1076 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1077 | pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len); | |
1078 | ||
1079 | if (ses->capabilities & CAP_UNICODE) { | |
1080 | /* unicode strings must be word aligned */ | |
1081 | if ((sess_data->iov[0].iov_len | |
1082 | + sess_data->iov[1].iov_len) % 2) { | |
1083 | *bcc_ptr = 0; | |
1084 | bcc_ptr++; | |
1085 | } | |
1086 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); | |
1087 | unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp); | |
1088 | } else { | |
1089 | /* BB: is this right? */ | |
1090 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1091 | } | |
1092 | ||
1093 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1094 | (long) sess_data->iov[2].iov_base; | |
1095 | ||
1096 | rc = sess_sendreceive(sess_data); | |
1097 | if (rc) | |
1098 | goto out_put_spnego_key; | |
1099 | ||
1100 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1101 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1102 | ||
1103 | if (smb_buf->WordCount != 4) { | |
1104 | rc = -EIO; | |
1105 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1106 | goto out_put_spnego_key; | |
1107 | } | |
1108 | ||
1109 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1110 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1111 | ||
1112 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1113 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1114 | ||
1115 | bytes_remaining = get_bcc(smb_buf); | |
1116 | bcc_ptr = pByteArea(smb_buf); | |
1117 | ||
1118 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
1119 | if (blob_len > bytes_remaining) { | |
1120 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1121 | blob_len); | |
1122 | rc = -EINVAL; | |
1123 | goto out_put_spnego_key; | |
1124 | } | |
1125 | bcc_ptr += blob_len; | |
1126 | bytes_remaining -= blob_len; | |
1127 | ||
1128 | /* BB check if Unicode and decode strings */ | |
1129 | if (bytes_remaining == 0) { | |
1130 | /* no string area to decode, do nothing */ | |
1131 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1132 | /* unicode string area must be word-aligned */ | |
1133 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1134 | ++bcc_ptr; | |
1135 | --bytes_remaining; | |
1136 | } | |
1137 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1138 | sess_data->nls_cp); | |
1139 | } else { | |
1140 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1141 | sess_data->nls_cp); | |
1142 | } | |
1143 | ||
1144 | rc = sess_establish_session(sess_data); | |
1145 | out_put_spnego_key: | |
1146 | key_invalidate(spnego_key); | |
1147 | key_put(spnego_key); | |
1148 | out: | |
1149 | sess_data->result = rc; | |
1150 | sess_data->func = NULL; | |
1151 | sess_free_buffer(sess_data); | |
1152 | kfree(ses->auth_key.response); | |
1153 | ses->auth_key.response = NULL; | |
1154 | } | |
1155 | ||
ee03c646 | 1156 | #endif /* ! CONFIG_CIFS_UPCALL */ |
583cf7af | 1157 | |
cc87c47d SP |
1158 | /* |
1159 | * The required kvec buffers have to be allocated before calling this | |
1160 | * function. | |
1161 | */ | |
1162 | static int | |
1163 | _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data) | |
3979877e | 1164 | { |
3979877e | 1165 | SESSION_SETUP_ANDX *pSMB; |
cc87c47d | 1166 | struct cifs_ses *ses = sess_data->ses; |
3979877e | 1167 | __u32 capabilities; |
cc87c47d | 1168 | char *bcc_ptr; |
254e55ed | 1169 | |
cc87c47d | 1170 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
cc87c47d SP |
1171 | |
1172 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1173 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { | |
1174 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); | |
1175 | return -ENOSYS; | |
3534b850 | 1176 | } |
3979877e | 1177 | |
cc87c47d SP |
1178 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
1179 | capabilities |= CAP_EXTENDED_SECURITY; | |
1180 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
80a0e637 | 1181 | |
cc87c47d SP |
1182 | bcc_ptr = sess_data->iov[2].iov_base; |
1183 | /* unicode strings must be word aligned */ | |
1184 | if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) { | |
1185 | *bcc_ptr = 0; | |
1186 | bcc_ptr++; | |
3f618223 | 1187 | } |
cc87c47d | 1188 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); |
3f618223 | 1189 | |
cc87c47d SP |
1190 | sess_data->iov[2].iov_len = (long) bcc_ptr - |
1191 | (long) sess_data->iov[2].iov_base; | |
80a0e637 | 1192 | |
cc87c47d SP |
1193 | return 0; |
1194 | } | |
1195 | ||
1196 | static void | |
1197 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data); | |
1198 | ||
1199 | static void | |
1200 | sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data) | |
1201 | { | |
1202 | int rc; | |
1203 | struct smb_hdr *smb_buf; | |
1204 | SESSION_SETUP_ANDX *pSMB; | |
1205 | struct cifs_ses *ses = sess_data->ses; | |
1206 | __u16 bytes_remaining; | |
1207 | char *bcc_ptr; | |
1208 | u16 blob_len; | |
1209 | ||
1210 | cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n"); | |
5c234aa5 | 1211 | |
cc87c47d SP |
1212 | /* |
1213 | * if memory allocation is successful, caller of this function | |
1214 | * frees it. | |
1215 | */ | |
1216 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
1217 | if (!ses->ntlmssp) { | |
1218 | rc = -ENOMEM; | |
1219 | goto out; | |
d3686d54 | 1220 | } |
cc87c47d | 1221 | ses->ntlmssp->sesskey_per_smbsess = false; |
d3686d54 | 1222 | |
cc87c47d SP |
1223 | /* wct = 12 */ |
1224 | rc = sess_alloc_buffer(sess_data, 12); | |
1225 | if (rc) | |
1226 | goto out; | |
0b3cc858 | 1227 | |
cc87c47d | 1228 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
3979877e | 1229 | |
cc87c47d SP |
1230 | /* Build security blob before we assemble the request */ |
1231 | build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses); | |
1232 | sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); | |
1233 | sess_data->iov[1].iov_base = pSMB->req.SecurityBlob; | |
1234 | pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); | |
1235 | ||
1236 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
790fe579 | 1237 | if (rc) |
cc87c47d | 1238 | goto out; |
3979877e | 1239 | |
cc87c47d | 1240 | rc = sess_sendreceive(sess_data); |
3979877e | 1241 | |
cc87c47d SP |
1242 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1243 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
750d1151 | 1244 | |
cc87c47d SP |
1245 | /* If true, rc here is expected and not an error */ |
1246 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
1247 | smb_buf->Status.CifsError == | |
1248 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)) | |
1249 | rc = 0; | |
2442421b | 1250 | |
cc87c47d SP |
1251 | if (rc) |
1252 | goto out; | |
1253 | ||
1254 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); | |
1255 | ||
1256 | if (smb_buf->WordCount != 4) { | |
1257 | rc = -EIO; | |
1258 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1259 | goto out; | |
5e6e6232 | 1260 | } |
3979877e | 1261 | |
cc87c47d SP |
1262 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
1263 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
2442421b | 1264 | |
cc87c47d SP |
1265 | bytes_remaining = get_bcc(smb_buf); |
1266 | bcc_ptr = pByteArea(smb_buf); | |
b4d6fcf1 | 1267 | |
cc87c47d SP |
1268 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1269 | if (blob_len > bytes_remaining) { | |
1270 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1271 | blob_len); | |
1272 | rc = -EINVAL; | |
1273 | goto out; | |
1274 | } | |
0b3cc858 | 1275 | |
cc87c47d SP |
1276 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); |
1277 | out: | |
1278 | sess_free_buffer(sess_data); | |
1279 | ||
1280 | if (!rc) { | |
1281 | sess_data->func = sess_auth_rawntlmssp_authenticate; | |
1282 | return; | |
3979877e SF |
1283 | } |
1284 | ||
cc87c47d SP |
1285 | /* Else error. Cleanup */ |
1286 | kfree(ses->auth_key.response); | |
1287 | ses->auth_key.response = NULL; | |
1288 | kfree(ses->ntlmssp); | |
1289 | ses->ntlmssp = NULL; | |
2442421b | 1290 | |
cc87c47d SP |
1291 | sess_data->func = NULL; |
1292 | sess_data->result = rc; | |
1293 | } | |
3979877e | 1294 | |
cc87c47d SP |
1295 | static void |
1296 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data) | |
1297 | { | |
1298 | int rc; | |
1299 | struct smb_hdr *smb_buf; | |
1300 | SESSION_SETUP_ANDX *pSMB; | |
1301 | struct cifs_ses *ses = sess_data->ses; | |
1302 | __u16 bytes_remaining; | |
1303 | char *bcc_ptr; | |
b8da344b | 1304 | unsigned char *ntlmsspblob = NULL; |
cc87c47d | 1305 | u16 blob_len; |
3979877e | 1306 | |
cc87c47d | 1307 | cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n"); |
3979877e | 1308 | |
cc87c47d SP |
1309 | /* wct = 12 */ |
1310 | rc = sess_alloc_buffer(sess_data, 12); | |
1311 | if (rc) | |
1312 | goto out; | |
3979877e | 1313 | |
cc87c47d SP |
1314 | /* Build security blob before we assemble the request */ |
1315 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1316 | smb_buf = (struct smb_hdr *)pSMB; | |
b8da344b | 1317 | rc = build_ntlmssp_auth_blob(&ntlmsspblob, |
cc87c47d SP |
1318 | &blob_len, ses, sess_data->nls_cp); |
1319 | if (rc) | |
1320 | goto out_free_ntlmsspblob; | |
1321 | sess_data->iov[1].iov_len = blob_len; | |
1322 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1323 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
1324 | /* | |
1325 | * Make sure that we tell the server that we are using | |
1326 | * the uid that it just gave us back on the response | |
1327 | * (challenge) | |
1328 | */ | |
1329 | smb_buf->Uid = ses->Suid; | |
1330 | ||
1331 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
0b3cc858 | 1332 | if (rc) |
cc87c47d | 1333 | goto out_free_ntlmsspblob; |
0b3cc858 | 1334 | |
cc87c47d SP |
1335 | rc = sess_sendreceive(sess_data); |
1336 | if (rc) | |
1337 | goto out_free_ntlmsspblob; | |
1338 | ||
1339 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1340 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
583cf7af | 1341 | if (smb_buf->WordCount != 4) { |
3979877e | 1342 | rc = -EIO; |
f96637be | 1343 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
cc87c47d | 1344 | goto out_free_ntlmsspblob; |
3979877e | 1345 | } |
cc87c47d SP |
1346 | |
1347 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
f96637be | 1348 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
cc87c47d | 1349 | |
ee9bbf46 SP |
1350 | if (ses->Suid != smb_buf->Uid) { |
1351 | ses->Suid = smb_buf->Uid; | |
1352 | cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid); | |
1353 | } | |
1354 | ||
690c522f | 1355 | bytes_remaining = get_bcc(smb_buf); |
3979877e | 1356 | bcc_ptr = pByteArea(smb_buf); |
583cf7af SP |
1357 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1358 | if (blob_len > bytes_remaining) { | |
1359 | cifs_dbg(VFS, "bad security blob length %d\n", | |
cc87c47d | 1360 | blob_len); |
583cf7af | 1361 | rc = -EINVAL; |
cc87c47d | 1362 | goto out_free_ntlmsspblob; |
790fe579 | 1363 | } |
583cf7af SP |
1364 | bcc_ptr += blob_len; |
1365 | bytes_remaining -= blob_len; | |
3979877e | 1366 | |
cc87c47d | 1367 | |
3979877e | 1368 | /* BB check if Unicode and decode strings */ |
fcda7f45 JL |
1369 | if (bytes_remaining == 0) { |
1370 | /* no string area to decode, do nothing */ | |
1371 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 JL |
1372 | /* unicode string area must be word-aligned */ |
1373 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1374 | ++bcc_ptr; | |
1375 | --bytes_remaining; | |
1376 | } | |
cc87c47d SP |
1377 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, |
1378 | sess_data->nls_cp); | |
27b87fe5 | 1379 | } else { |
cc87c47d SP |
1380 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, |
1381 | sess_data->nls_cp); | |
27b87fe5 | 1382 | } |
50c2f753 | 1383 | |
cc87c47d | 1384 | out_free_ntlmsspblob: |
2b149f11 | 1385 | kfree(ntlmsspblob); |
cc87c47d SP |
1386 | out: |
1387 | sess_free_buffer(sess_data); | |
d4e63bd6 | 1388 | |
cc87c47d SP |
1389 | if (!rc) |
1390 | rc = sess_establish_session(sess_data); | |
d4e63bd6 | 1391 | |
cc87c47d | 1392 | /* Cleanup */ |
d4e63bd6 SP |
1393 | kfree(ses->auth_key.response); |
1394 | ses->auth_key.response = NULL; | |
1395 | kfree(ses->ntlmssp); | |
cc87c47d | 1396 | ses->ntlmssp = NULL; |
d4e63bd6 | 1397 | |
cc87c47d SP |
1398 | sess_data->func = NULL; |
1399 | sess_data->result = rc; | |
1400 | } | |
80a0e637 | 1401 | |
27924075 | 1402 | static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data) |
cc87c47d SP |
1403 | { |
1404 | int type; | |
1405 | ||
ef65aaed | 1406 | type = cifs_select_sectype(ses->server, ses->sectype); |
cc87c47d SP |
1407 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1408 | if (type == Unspecified) { | |
1409 | cifs_dbg(VFS, | |
1410 | "Unable to select appropriate authentication method!"); | |
1411 | return -EINVAL; | |
1412 | } | |
1413 | ||
1414 | switch (type) { | |
1415 | case LANMAN: | |
1416 | /* LANMAN and plaintext are less secure and off by default. | |
1417 | * So we make this explicitly be turned on in kconfig (in the | |
1418 | * build) and turned on at runtime (changed from the default) | |
1419 | * in proc/fs/cifs or via mount parm. Unfortunately this is | |
1420 | * needed for old Win (e.g. Win95), some obscure NAS and OS/2 */ | |
1421 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
1422 | sess_data->func = sess_auth_lanman; | |
1423 | break; | |
1424 | #else | |
1425 | return -EOPNOTSUPP; | |
1426 | #endif | |
1427 | case NTLM: | |
1428 | sess_data->func = sess_auth_ntlm; | |
1429 | break; | |
1430 | case NTLMv2: | |
1431 | sess_data->func = sess_auth_ntlmv2; | |
1432 | break; | |
1433 | case Kerberos: | |
1434 | #ifdef CONFIG_CIFS_UPCALL | |
1435 | sess_data->func = sess_auth_kerberos; | |
1436 | break; | |
1437 | #else | |
1438 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1439 | return -ENOSYS; | |
1440 | break; | |
1441 | #endif /* CONFIG_CIFS_UPCALL */ | |
1442 | case RawNTLMSSP: | |
1443 | sess_data->func = sess_auth_rawntlmssp_negotiate; | |
1444 | break; | |
1445 | default: | |
1446 | cifs_dbg(VFS, "secType %d not supported!\n", type); | |
1447 | return -ENOSYS; | |
1448 | } | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, | |
1454 | const struct nls_table *nls_cp) | |
1455 | { | |
1456 | int rc = 0; | |
1457 | struct sess_data *sess_data; | |
1458 | ||
1459 | if (ses == NULL) { | |
1460 | WARN(1, "%s: ses == NULL!", __func__); | |
1461 | return -EINVAL; | |
1462 | } | |
1463 | ||
1464 | sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL); | |
1465 | if (!sess_data) | |
1466 | return -ENOMEM; | |
1467 | ||
1468 | rc = select_sec(ses, sess_data); | |
1469 | if (rc) | |
1470 | goto out; | |
1471 | ||
1472 | sess_data->xid = xid; | |
1473 | sess_data->ses = ses; | |
1474 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1475 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
1476 | ||
1477 | while (sess_data->func) | |
1478 | sess_data->func(sess_data); | |
1479 | ||
1480 | /* Store result before we free sess_data */ | |
80a0e637 | 1481 | rc = sess_data->result; |
cc87c47d SP |
1482 | |
1483 | out: | |
80a0e637 SP |
1484 | kfree(sess_data); |
1485 | return rc; | |
3979877e | 1486 | } |