Commit | Line | Data |
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929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
3979877e | 2 | /* |
3979877e SF |
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 | * | |
3979877e SF |
9 | */ |
10 | ||
11 | #include "cifspdu.h" | |
12 | #include "cifsglob.h" | |
13 | #include "cifsproto.h" | |
14 | #include "cifs_unicode.h" | |
15 | #include "cifs_debug.h" | |
16 | #include "ntlmssp.h" | |
17 | #include "nterr.h" | |
9c53588e | 18 | #include <linux/utsname.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
2442421b | 20 | #include "cifs_spnego.h" |
d70e9fa5 | 21 | #include "smb2proto.h" |
3fa1c6d1 | 22 | #include "fs_context.h" |
d70e9fa5 | 23 | |
387ec58f RS |
24 | static int |
25 | cifs_ses_add_channel(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses, | |
26 | struct cifs_server_iface *iface); | |
27 | ||
d70e9fa5 AA |
28 | bool |
29 | is_server_using_iface(struct TCP_Server_Info *server, | |
30 | struct cifs_server_iface *iface) | |
31 | { | |
32 | struct sockaddr_in *i4 = (struct sockaddr_in *)&iface->sockaddr; | |
33 | struct sockaddr_in6 *i6 = (struct sockaddr_in6 *)&iface->sockaddr; | |
34 | struct sockaddr_in *s4 = (struct sockaddr_in *)&server->dstaddr; | |
35 | struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)&server->dstaddr; | |
36 | ||
37 | if (server->dstaddr.ss_family != iface->sockaddr.ss_family) | |
38 | return false; | |
39 | if (server->dstaddr.ss_family == AF_INET) { | |
40 | if (s4->sin_addr.s_addr != i4->sin_addr.s_addr) | |
41 | return false; | |
42 | } else if (server->dstaddr.ss_family == AF_INET6) { | |
43 | if (memcmp(&s6->sin6_addr, &i6->sin6_addr, | |
44 | sizeof(i6->sin6_addr)) != 0) | |
45 | return false; | |
46 | } else { | |
47 | /* unknown family.. */ | |
48 | return false; | |
49 | } | |
50 | return true; | |
51 | } | |
52 | ||
53 | bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface) | |
54 | { | |
55 | int i; | |
56 | ||
724244cd | 57 | spin_lock(&ses->chan_lock); |
d70e9fa5 | 58 | for (i = 0; i < ses->chan_count; i++) { |
724244cd SP |
59 | if (is_server_using_iface(ses->chans[i].server, iface)) { |
60 | spin_unlock(&ses->chan_lock); | |
d70e9fa5 | 61 | return true; |
724244cd | 62 | } |
d70e9fa5 | 63 | } |
724244cd | 64 | spin_unlock(&ses->chan_lock); |
d70e9fa5 AA |
65 | return false; |
66 | } | |
67 | ||
68 | /* returns number of channels added */ | |
387ec58f | 69 | int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses) |
d70e9fa5 | 70 | { |
724244cd SP |
71 | int old_chan_count, new_chan_count; |
72 | int left; | |
d70e9fa5 AA |
73 | int i = 0; |
74 | int rc = 0; | |
65a37a34 | 75 | int tries = 0; |
9a7d5a9e AA |
76 | struct cifs_server_iface *ifaces = NULL; |
77 | size_t iface_count; | |
d70e9fa5 | 78 | |
724244cd SP |
79 | if (ses->server->dialect < SMB30_PROT_ID) { |
80 | cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n"); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | spin_lock(&ses->chan_lock); | |
85 | ||
86 | new_chan_count = old_chan_count = ses->chan_count; | |
87 | left = ses->chan_max - ses->chan_count; | |
88 | ||
d70e9fa5 AA |
89 | if (left <= 0) { |
90 | cifs_dbg(FYI, | |
91 | "ses already at max_channels (%zu), nothing to open\n", | |
92 | ses->chan_max); | |
724244cd | 93 | spin_unlock(&ses->chan_lock); |
d70e9fa5 AA |
94 | return 0; |
95 | } | |
96 | ||
9c2dc11d SF |
97 | if (!(ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) { |
98 | cifs_dbg(VFS, "server %s does not support multichannel\n", ses->server->hostname); | |
99 | ses->chan_max = 1; | |
724244cd | 100 | spin_unlock(&ses->chan_lock); |
9c2dc11d SF |
101 | return 0; |
102 | } | |
724244cd | 103 | spin_unlock(&ses->chan_lock); |
9c2dc11d | 104 | |
9a7d5a9e AA |
105 | /* |
106 | * Make a copy of the iface list at the time and use that | |
107 | * instead so as to not hold the iface spinlock for opening | |
108 | * channels | |
109 | */ | |
110 | spin_lock(&ses->iface_lock); | |
111 | iface_count = ses->iface_count; | |
112 | if (iface_count <= 0) { | |
113 | spin_unlock(&ses->iface_lock); | |
343a1b77 | 114 | cifs_dbg(VFS, "no iface list available to open channels\n"); |
9a7d5a9e AA |
115 | return 0; |
116 | } | |
117 | ifaces = kmemdup(ses->iface_list, iface_count*sizeof(*ifaces), | |
118 | GFP_ATOMIC); | |
119 | if (!ifaces) { | |
120 | spin_unlock(&ses->iface_lock); | |
121 | return 0; | |
122 | } | |
123 | spin_unlock(&ses->iface_lock); | |
124 | ||
65a37a34 AA |
125 | /* |
126 | * Keep connecting to same, fastest, iface for all channels as | |
127 | * long as its RSS. Try next fastest one if not RSS or channel | |
128 | * creation fails. | |
129 | */ | |
130 | while (left > 0) { | |
d70e9fa5 AA |
131 | struct cifs_server_iface *iface; |
132 | ||
65a37a34 AA |
133 | tries++; |
134 | if (tries > 3*ses->chan_max) { | |
bbbf9eaf | 135 | cifs_dbg(FYI, "too many channel open attempts (%d channels left to open)\n", |
65a37a34 AA |
136 | left); |
137 | break; | |
138 | } | |
139 | ||
9a7d5a9e | 140 | iface = &ifaces[i]; |
65a37a34 | 141 | if (is_ses_using_iface(ses, iface) && !iface->rss_capable) { |
9a7d5a9e | 142 | i = (i+1) % iface_count; |
d70e9fa5 | 143 | continue; |
65a37a34 | 144 | } |
d70e9fa5 | 145 | |
387ec58f | 146 | rc = cifs_ses_add_channel(cifs_sb, ses, iface); |
d70e9fa5 | 147 | if (rc) { |
65a37a34 AA |
148 | cifs_dbg(FYI, "failed to open extra channel on iface#%d rc=%d\n", |
149 | i, rc); | |
9a7d5a9e | 150 | i = (i+1) % iface_count; |
d70e9fa5 AA |
151 | continue; |
152 | } | |
153 | ||
65a37a34 AA |
154 | cifs_dbg(FYI, "successfully opened new channel on iface#%d\n", |
155 | i); | |
d70e9fa5 | 156 | left--; |
724244cd | 157 | new_chan_count++; |
d70e9fa5 AA |
158 | } |
159 | ||
9a7d5a9e | 160 | kfree(ifaces); |
724244cd | 161 | return new_chan_count - old_chan_count; |
d70e9fa5 AA |
162 | } |
163 | ||
2f589679 AA |
164 | /* |
165 | * If server is a channel of ses, return the corresponding enclosing | |
166 | * cifs_chan otherwise return NULL. | |
167 | */ | |
168 | struct cifs_chan * | |
169 | cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server) | |
170 | { | |
171 | int i; | |
172 | ||
724244cd | 173 | spin_lock(&ses->chan_lock); |
2f589679 | 174 | for (i = 0; i < ses->chan_count; i++) { |
724244cd SP |
175 | if (ses->chans[i].server == server) { |
176 | spin_unlock(&ses->chan_lock); | |
2f589679 | 177 | return &ses->chans[i]; |
724244cd | 178 | } |
2f589679 | 179 | } |
724244cd | 180 | spin_unlock(&ses->chan_lock); |
2f589679 AA |
181 | return NULL; |
182 | } | |
183 | ||
387ec58f RS |
184 | static int |
185 | cifs_ses_add_channel(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses, | |
186 | struct cifs_server_iface *iface) | |
d70e9fa5 | 187 | { |
724244cd | 188 | struct TCP_Server_Info *chan_server; |
d70e9fa5 | 189 | struct cifs_chan *chan; |
3fa1c6d1 | 190 | struct smb3_fs_context ctx = {NULL}; |
d70e9fa5 AA |
191 | static const char unc_fmt[] = "\\%s\\foo"; |
192 | char unc[sizeof(unc_fmt)+SERVER_NAME_LEN_WITH_NULL] = {0}; | |
193 | struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; | |
194 | struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; | |
195 | int rc; | |
196 | unsigned int xid = get_xid(); | |
197 | ||
d70e9fa5 | 198 | if (iface->sockaddr.ss_family == AF_INET) |
a0a3036b JP |
199 | cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI4)\n", |
200 | ses, iface->speed, iface->rdma_capable ? "yes" : "no", | |
201 | &ipv4->sin_addr); | |
d70e9fa5 | 202 | else |
5e538959 | 203 | cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI6)\n", |
a0a3036b JP |
204 | ses, iface->speed, iface->rdma_capable ? "yes" : "no", |
205 | &ipv6->sin6_addr); | |
d70e9fa5 AA |
206 | |
207 | /* | |
3fa1c6d1 | 208 | * Setup a ctx with mostly the same info as the existing |
d70e9fa5 AA |
209 | * session and overwrite it with the requested iface data. |
210 | * | |
211 | * We need to setup at least the fields used for negprot and | |
212 | * sesssetup. | |
213 | * | |
24e0a1ef | 214 | * We only need the ctx here, so we can reuse memory from |
d70e9fa5 AA |
215 | * the session and server without caring about memory |
216 | * management. | |
217 | */ | |
218 | ||
219 | /* Always make new connection for now (TODO?) */ | |
3fa1c6d1 | 220 | ctx.nosharesock = true; |
d70e9fa5 AA |
221 | |
222 | /* Auth */ | |
3fa1c6d1 RS |
223 | ctx.domainauto = ses->domainAuto; |
224 | ctx.domainname = ses->domainName; | |
225 | ctx.username = ses->user_name; | |
226 | ctx.password = ses->password; | |
227 | ctx.sectype = ses->sectype; | |
228 | ctx.sign = ses->sign; | |
d70e9fa5 AA |
229 | |
230 | /* UNC and paths */ | |
231 | /* XXX: Use ses->server->hostname? */ | |
b438fcf1 | 232 | sprintf(unc, unc_fmt, ses->ip_addr); |
3fa1c6d1 RS |
233 | ctx.UNC = unc; |
234 | ctx.prepath = ""; | |
d70e9fa5 | 235 | |
bbbf9eaf | 236 | /* Reuse same version as master connection */ |
3fa1c6d1 RS |
237 | ctx.vals = ses->server->vals; |
238 | ctx.ops = ses->server->ops; | |
d70e9fa5 | 239 | |
3fa1c6d1 RS |
240 | ctx.noblocksnd = ses->server->noblocksnd; |
241 | ctx.noautotune = ses->server->noautotune; | |
242 | ctx.sockopt_tcp_nodelay = ses->server->tcp_nodelay; | |
243 | ctx.echo_interval = ses->server->echo_interval / HZ; | |
a249cc8b | 244 | ctx.max_credits = ses->server->max_credits; |
d70e9fa5 AA |
245 | |
246 | /* | |
247 | * This will be used for encoding/decoding user/domain/pw | |
248 | * during sess setup auth. | |
d70e9fa5 | 249 | */ |
387ec58f | 250 | ctx.local_nls = cifs_sb->local_nls; |
d70e9fa5 AA |
251 | |
252 | /* Use RDMA if possible */ | |
3fa1c6d1 RS |
253 | ctx.rdma = iface->rdma_capable; |
254 | memcpy(&ctx.dstaddr, &iface->sockaddr, sizeof(struct sockaddr_storage)); | |
d70e9fa5 AA |
255 | |
256 | /* reuse master con client guid */ | |
3fa1c6d1 | 257 | memcpy(&ctx.client_guid, ses->server->client_guid, |
d70e9fa5 | 258 | SMB2_CLIENT_GUID_SIZE); |
3fa1c6d1 | 259 | ctx.use_client_guid = true; |
d70e9fa5 | 260 | |
724244cd | 261 | chan_server = cifs_get_tcp_session(&ctx); |
d70e9fa5 | 262 | |
724244cd SP |
263 | mutex_lock(&ses->session_mutex); |
264 | spin_lock(&ses->chan_lock); | |
8eec7954 | 265 | chan = ses->binding_chan = &ses->chans[ses->chan_count]; |
724244cd | 266 | chan->server = chan_server; |
d70e9fa5 AA |
267 | if (IS_ERR(chan->server)) { |
268 | rc = PTR_ERR(chan->server); | |
269 | chan->server = NULL; | |
724244cd | 270 | spin_unlock(&ses->chan_lock); |
d70e9fa5 AA |
271 | goto out; |
272 | } | |
724244cd SP |
273 | spin_unlock(&ses->chan_lock); |
274 | ||
3345bb44 PAS |
275 | spin_lock(&cifs_tcp_ses_lock); |
276 | chan->server->is_channel = true; | |
277 | spin_unlock(&cifs_tcp_ses_lock); | |
d70e9fa5 AA |
278 | |
279 | /* | |
280 | * We need to allocate the server crypto now as we will need | |
281 | * to sign packets before we generate the channel signing key | |
282 | * (we sign with the session key) | |
283 | */ | |
284 | rc = smb311_crypto_shash_allocate(chan->server); | |
285 | if (rc) { | |
286 | cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); | |
287 | goto out; | |
288 | } | |
289 | ||
290 | ses->binding = true; | |
291 | rc = cifs_negotiate_protocol(xid, ses); | |
292 | if (rc) | |
293 | goto out; | |
294 | ||
387ec58f | 295 | rc = cifs_setup_session(xid, ses, cifs_sb->local_nls); |
d70e9fa5 AA |
296 | if (rc) |
297 | goto out; | |
298 | ||
299 | /* success, put it on the list | |
bbbf9eaf | 300 | * XXX: sharing ses between 2 tcp servers is not possible, the |
d70e9fa5 AA |
301 | * way "internal" linked lists works in linux makes element |
302 | * only able to belong to one list | |
303 | * | |
304 | * the binding session is already established so the rest of | |
305 | * the code should be able to look it up, no need to add the | |
306 | * ses to the new server. | |
307 | */ | |
308 | ||
724244cd | 309 | spin_lock(&ses->chan_lock); |
d70e9fa5 AA |
310 | ses->chan_count++; |
311 | atomic_set(&ses->chan_seq, 0); | |
724244cd SP |
312 | spin_unlock(&ses->chan_lock); |
313 | ||
d70e9fa5 AA |
314 | out: |
315 | ses->binding = false; | |
8eec7954 | 316 | ses->binding_chan = NULL; |
d70e9fa5 AA |
317 | mutex_unlock(&ses->session_mutex); |
318 | ||
319 | if (rc && chan->server) | |
320 | cifs_put_tcp_session(chan->server, 0); | |
d70e9fa5 AA |
321 | |
322 | return rc; | |
323 | } | |
3979877e | 324 | |
96daf2b0 | 325 | static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB) |
3979877e SF |
326 | { |
327 | __u32 capabilities = 0; | |
328 | ||
329 | /* init fields common to all four types of SessSetup */ | |
eca6acf9 SF |
330 | /* Note that offsets for first seven fields in req struct are same */ |
331 | /* in CIFS Specs so does not matter which of 3 forms of struct */ | |
332 | /* that we use in next few lines */ | |
333 | /* Note that header is initialized to zero in header_assemble */ | |
3979877e | 334 | pSMB->req.AndXCommand = 0xFF; |
c974befa JL |
335 | pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32, |
336 | CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4, | |
337 | USHRT_MAX)); | |
3979877e | 338 | pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq); |
bc09d141 | 339 | pSMB->req.VcNumber = cpu_to_le16(1); |
3979877e SF |
340 | |
341 | /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */ | |
342 | ||
790fe579 | 343 | /* BB verify whether signing required on neg or just on auth frame |
3979877e SF |
344 | (and NTLM case) */ |
345 | ||
346 | capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | | |
347 | CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; | |
348 | ||
38d77c50 | 349 | if (ses->server->sign) |
3979877e SF |
350 | pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
351 | ||
352 | if (ses->capabilities & CAP_UNICODE) { | |
353 | pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE; | |
354 | capabilities |= CAP_UNICODE; | |
355 | } | |
356 | if (ses->capabilities & CAP_STATUS32) { | |
357 | pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS; | |
358 | capabilities |= CAP_STATUS32; | |
359 | } | |
360 | if (ses->capabilities & CAP_DFS) { | |
361 | pSMB->req.hdr.Flags2 |= SMBFLG2_DFS; | |
362 | capabilities |= CAP_DFS; | |
363 | } | |
26f57364 | 364 | if (ses->capabilities & CAP_UNIX) |
3979877e | 365 | capabilities |= CAP_UNIX; |
3979877e | 366 | |
3979877e SF |
367 | return capabilities; |
368 | } | |
369 | ||
0d3a01fa JL |
370 | static void |
371 | unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp) | |
372 | { | |
373 | char *bcc_ptr = *pbcc_area; | |
374 | int bytes_ret = 0; | |
375 | ||
376 | /* Copy OS version */ | |
acbbb76a SF |
377 | bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32, |
378 | nls_cp); | |
0d3a01fa | 379 | bcc_ptr += 2 * bytes_ret; |
acbbb76a SF |
380 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release, |
381 | 32, nls_cp); | |
0d3a01fa JL |
382 | bcc_ptr += 2 * bytes_ret; |
383 | bcc_ptr += 2; /* trailing null */ | |
384 | ||
acbbb76a SF |
385 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS, |
386 | 32, nls_cp); | |
0d3a01fa JL |
387 | bcc_ptr += 2 * bytes_ret; |
388 | bcc_ptr += 2; /* trailing null */ | |
389 | ||
390 | *pbcc_area = bcc_ptr; | |
391 | } | |
392 | ||
96daf2b0 | 393 | static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses, |
0d3a01fa JL |
394 | const struct nls_table *nls_cp) |
395 | { | |
396 | char *bcc_ptr = *pbcc_area; | |
397 | int bytes_ret = 0; | |
398 | ||
399 | /* copy domain */ | |
400 | if (ses->domainName == NULL) { | |
401 | /* Sending null domain better than using a bogus domain name (as | |
402 | we did briefly in 2.6.18) since server will use its default */ | |
403 | *bcc_ptr = 0; | |
404 | *(bcc_ptr+1) = 0; | |
405 | bytes_ret = 0; | |
406 | } else | |
acbbb76a | 407 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName, |
057d6332 | 408 | CIFS_MAX_DOMAINNAME_LEN, nls_cp); |
0d3a01fa JL |
409 | bcc_ptr += 2 * bytes_ret; |
410 | bcc_ptr += 2; /* account for null terminator */ | |
411 | ||
412 | *pbcc_area = bcc_ptr; | |
413 | } | |
414 | ||
415 | ||
96daf2b0 | 416 | static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 417 | const struct nls_table *nls_cp) |
3979877e | 418 | { |
790fe579 | 419 | char *bcc_ptr = *pbcc_area; |
3979877e SF |
420 | int bytes_ret = 0; |
421 | ||
422 | /* BB FIXME add check that strings total less | |
423 | than 335 or will need to send them as arrays */ | |
424 | ||
0223cf0b SF |
425 | /* unicode strings, must be word aligned before the call */ |
426 | /* if ((long) bcc_ptr % 2) { | |
3979877e SF |
427 | *bcc_ptr = 0; |
428 | bcc_ptr++; | |
0223cf0b | 429 | } */ |
3979877e | 430 | /* copy user */ |
8727c8a8 | 431 | if (ses->user_name == NULL) { |
6e659c63 SF |
432 | /* null user mount */ |
433 | *bcc_ptr = 0; | |
434 | *(bcc_ptr+1) = 0; | |
301a6a31 | 435 | } else { |
acbbb76a | 436 | bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name, |
8c3a2b4c | 437 | CIFS_MAX_USERNAME_LEN, nls_cp); |
3979877e SF |
438 | } |
439 | bcc_ptr += 2 * bytes_ret; | |
440 | bcc_ptr += 2; /* account for null termination */ | |
3979877e | 441 | |
0d3a01fa JL |
442 | unicode_domain_string(&bcc_ptr, ses, nls_cp); |
443 | unicode_oslm_strings(&bcc_ptr, nls_cp); | |
3979877e SF |
444 | |
445 | *pbcc_area = bcc_ptr; | |
446 | } | |
447 | ||
96daf2b0 | 448 | static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, |
790fe579 | 449 | const struct nls_table *nls_cp) |
3979877e | 450 | { |
790fe579 | 451 | char *bcc_ptr = *pbcc_area; |
340625e6 | 452 | int len; |
3979877e SF |
453 | |
454 | /* copy user */ | |
455 | /* BB what about null user mounts - check that we do this BB */ | |
790fe579 | 456 | /* copy user */ |
de47a417 | 457 | if (ses->user_name != NULL) { |
340625e6 RS |
458 | len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); |
459 | if (WARN_ON_ONCE(len < 0)) | |
460 | len = CIFS_MAX_USERNAME_LEN - 1; | |
461 | bcc_ptr += len; | |
de47a417 | 462 | } |
8727c8a8 | 463 | /* else null user mount */ |
3979877e | 464 | *bcc_ptr = 0; |
790fe579 | 465 | bcc_ptr++; /* account for null termination */ |
3979877e | 466 | |
790fe579 | 467 | /* copy domain */ |
790fe579 | 468 | if (ses->domainName != NULL) { |
340625e6 RS |
469 | len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); |
470 | if (WARN_ON_ONCE(len < 0)) | |
471 | len = CIFS_MAX_DOMAINNAME_LEN - 1; | |
472 | bcc_ptr += len; | |
790fe579 | 473 | } /* else we will send a null domain name |
6e659c63 | 474 | so the server will default to its own domain */ |
3979877e SF |
475 | *bcc_ptr = 0; |
476 | bcc_ptr++; | |
477 | ||
478 | /* BB check for overflow here */ | |
479 | ||
480 | strcpy(bcc_ptr, "Linux version "); | |
481 | bcc_ptr += strlen("Linux version "); | |
96b644bd SH |
482 | strcpy(bcc_ptr, init_utsname()->release); |
483 | bcc_ptr += strlen(init_utsname()->release) + 1; | |
3979877e SF |
484 | |
485 | strcpy(bcc_ptr, CIFS_NETWORK_OPSYS); | |
486 | bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1; | |
487 | ||
790fe579 | 488 | *pbcc_area = bcc_ptr; |
3979877e SF |
489 | } |
490 | ||
59140797 | 491 | static void |
96daf2b0 | 492 | decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses, |
59140797 | 493 | const struct nls_table *nls_cp) |
3979877e | 494 | { |
59140797 | 495 | int len; |
790fe579 | 496 | char *data = *pbcc_area; |
3979877e | 497 | |
f96637be | 498 | cifs_dbg(FYI, "bleft %d\n", bleft); |
3979877e | 499 | |
26f57364 | 500 | kfree(ses->serverOS); |
acbbb76a | 501 | ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 502 | cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS); |
59140797 JL |
503 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
504 | data += len; | |
505 | bleft -= len; | |
506 | if (bleft <= 0) | |
507 | return; | |
3979877e | 508 | |
26f57364 | 509 | kfree(ses->serverNOS); |
acbbb76a | 510 | ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 511 | cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS); |
59140797 JL |
512 | len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2; |
513 | data += len; | |
514 | bleft -= len; | |
515 | if (bleft <= 0) | |
516 | return; | |
790fe579 | 517 | |
26f57364 | 518 | kfree(ses->serverDomain); |
acbbb76a | 519 | ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp); |
f96637be | 520 | cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain); |
790fe579 | 521 | |
59140797 | 522 | return; |
3979877e SF |
523 | } |
524 | ||
7d066459 JL |
525 | static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, |
526 | struct cifs_ses *ses, | |
527 | const struct nls_table *nls_cp) | |
3979877e | 528 | { |
3979877e | 529 | int len; |
790fe579 | 530 | char *bcc_ptr = *pbcc_area; |
3979877e | 531 | |
f96637be | 532 | cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft); |
50c2f753 | 533 | |
3979877e | 534 | len = strnlen(bcc_ptr, bleft); |
790fe579 | 535 | if (len >= bleft) |
7d066459 | 536 | return; |
50c2f753 | 537 | |
26f57364 | 538 | kfree(ses->serverOS); |
3979877e | 539 | |
340625e6 | 540 | ses->serverOS = kmalloc(len + 1, GFP_KERNEL); |
27b7edcf | 541 | if (ses->serverOS) { |
340625e6 RS |
542 | memcpy(ses->serverOS, bcc_ptr, len); |
543 | ses->serverOS[len] = 0; | |
27b7edcf NJ |
544 | if (strncmp(ses->serverOS, "OS/2", 4) == 0) |
545 | cifs_dbg(FYI, "OS/2 server\n"); | |
546 | } | |
3979877e SF |
547 | |
548 | bcc_ptr += len + 1; | |
549 | bleft -= len + 1; | |
550 | ||
551 | len = strnlen(bcc_ptr, bleft); | |
790fe579 | 552 | if (len >= bleft) |
7d066459 | 553 | return; |
3979877e | 554 | |
26f57364 | 555 | kfree(ses->serverNOS); |
3979877e | 556 | |
340625e6 RS |
557 | ses->serverNOS = kmalloc(len + 1, GFP_KERNEL); |
558 | if (ses->serverNOS) { | |
559 | memcpy(ses->serverNOS, bcc_ptr, len); | |
560 | ses->serverNOS[len] = 0; | |
561 | } | |
3979877e SF |
562 | |
563 | bcc_ptr += len + 1; | |
564 | bleft -= len + 1; | |
565 | ||
790fe579 SF |
566 | len = strnlen(bcc_ptr, bleft); |
567 | if (len > bleft) | |
7d066459 | 568 | return; |
3979877e | 569 | |
9ac00b7d SF |
570 | /* No domain field in LANMAN case. Domain is |
571 | returned by old servers in the SMB negprot response */ | |
572 | /* BB For newer servers which do not support Unicode, | |
573 | but thus do return domain here we could add parsing | |
574 | for it later, but it is not very important */ | |
f96637be | 575 | cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); |
3979877e SF |
576 | } |
577 | ||
5478f9ba | 578 | int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, |
96daf2b0 | 579 | struct cifs_ses *ses) |
0b3cc858 | 580 | { |
2b149f11 SP |
581 | unsigned int tioffset; /* challenge message target info area */ |
582 | unsigned int tilen; /* challenge message target info area length */ | |
583 | ||
0b3cc858 SF |
584 | CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr; |
585 | ||
586 | if (blob_len < sizeof(CHALLENGE_MESSAGE)) { | |
f96637be | 587 | cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len); |
0b3cc858 SF |
588 | return -EINVAL; |
589 | } | |
590 | ||
591 | if (memcmp(pblob->Signature, "NTLMSSP", 8)) { | |
f96637be JP |
592 | cifs_dbg(VFS, "blob signature incorrect %s\n", |
593 | pblob->Signature); | |
0b3cc858 SF |
594 | return -EINVAL; |
595 | } | |
596 | if (pblob->MessageType != NtLmChallenge) { | |
f96637be JP |
597 | cifs_dbg(VFS, "Incorrect message type %d\n", |
598 | pblob->MessageType); | |
0b3cc858 SF |
599 | return -EINVAL; |
600 | } | |
601 | ||
d3686d54 | 602 | memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); |
0b3cc858 SF |
603 | /* BB we could decode pblob->NegotiateFlags; some may be useful */ |
604 | /* In particular we can examine sign flags */ | |
605 | /* BB spec says that if AvId field of MsvAvTimestamp is populated then | |
606 | we must set the MIC field of the AUTHENTICATE_MESSAGE */ | |
d3686d54 | 607 | ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); |
5443d130 SF |
608 | tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset); |
609 | tilen = le16_to_cpu(pblob->TargetInfoArray.Length); | |
4991a5fa | 610 | if (tioffset > blob_len || tioffset + tilen > blob_len) { |
a0a3036b JP |
611 | cifs_dbg(VFS, "tioffset + tilen too high %u + %u\n", |
612 | tioffset, tilen); | |
4991a5fa DC |
613 | return -EINVAL; |
614 | } | |
d3686d54 | 615 | if (tilen) { |
f7f7c185 SMP |
616 | ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen, |
617 | GFP_KERNEL); | |
d3686d54 | 618 | if (!ses->auth_key.response) { |
a0a3036b | 619 | cifs_dbg(VFS, "Challenge target info alloc failure\n"); |
2b149f11 SP |
620 | return -ENOMEM; |
621 | } | |
d3686d54 | 622 | ses->auth_key.len = tilen; |
2b149f11 SP |
623 | } |
624 | ||
0b3cc858 SF |
625 | return 0; |
626 | } | |
627 | ||
49bd49f9 SP |
628 | static int size_of_ntlmssp_blob(struct cifs_ses *ses, int base_size) |
629 | { | |
630 | int sz = base_size + ses->auth_key.len | |
631 | - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2; | |
632 | ||
633 | if (ses->domainName) | |
634 | sz += sizeof(__le16) * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); | |
635 | else | |
636 | sz += sizeof(__le16); | |
637 | ||
638 | if (ses->user_name) | |
639 | sz += sizeof(__le16) * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); | |
640 | else | |
641 | sz += sizeof(__le16); | |
642 | ||
643 | sz += sizeof(__le16) * strnlen(ses->workstation_name, CIFS_MAX_WORKSTATION_LEN); | |
644 | ||
645 | return sz; | |
646 | } | |
647 | ||
648 | static inline void cifs_security_buffer_from_str(SECURITY_BUFFER *pbuf, | |
649 | char *str_value, | |
650 | int str_length, | |
651 | unsigned char *pstart, | |
652 | unsigned char **pcur, | |
653 | const struct nls_table *nls_cp) | |
654 | { | |
655 | unsigned char *tmp = pstart; | |
656 | int len; | |
657 | ||
658 | if (!pbuf) | |
659 | return; | |
660 | ||
661 | if (!pcur) | |
662 | pcur = &tmp; | |
663 | ||
664 | if (!str_value) { | |
665 | pbuf->BufferOffset = cpu_to_le32(*pcur - pstart); | |
666 | pbuf->Length = 0; | |
667 | pbuf->MaximumLength = 0; | |
668 | *pcur += sizeof(__le16); | |
669 | } else { | |
670 | len = cifs_strtoUTF16((__le16 *)*pcur, | |
671 | str_value, | |
672 | str_length, | |
673 | nls_cp); | |
674 | len *= sizeof(__le16); | |
675 | pbuf->BufferOffset = cpu_to_le32(*pcur - pstart); | |
676 | pbuf->Length = cpu_to_le16(len); | |
677 | pbuf->MaximumLength = cpu_to_le16(len); | |
678 | *pcur += len; | |
679 | } | |
680 | } | |
681 | ||
0b3cc858 SF |
682 | /* BB Move to ntlmssp.c eventually */ |
683 | ||
49bd49f9 SP |
684 | int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, |
685 | u16 *buflen, | |
686 | struct cifs_ses *ses, | |
687 | const struct nls_table *nls_cp) | |
0b3cc858 | 688 | { |
49bd49f9 | 689 | int rc = 0; |
f6a6bf7c | 690 | struct TCP_Server_Info *server = cifs_ses_server(ses); |
49bd49f9 | 691 | NEGOTIATE_MESSAGE *sec_blob; |
0b3cc858 | 692 | __u32 flags; |
49bd49f9 SP |
693 | unsigned char *tmp; |
694 | int len; | |
695 | ||
696 | len = size_of_ntlmssp_blob(ses, sizeof(NEGOTIATE_MESSAGE)); | |
697 | *pbuffer = kmalloc(len, GFP_KERNEL); | |
698 | if (!*pbuffer) { | |
699 | rc = -ENOMEM; | |
700 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
701 | *buflen = 0; | |
702 | goto setup_ntlm_neg_ret; | |
703 | } | |
704 | sec_blob = (NEGOTIATE_MESSAGE *)*pbuffer; | |
0b3cc858 | 705 | |
49bd49f9 | 706 | memset(*pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); |
0b3cc858 SF |
707 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
708 | sec_blob->MessageType = NtLmNegotiate; | |
709 | ||
710 | /* BB is NTLMV2 session security format easier to use here? */ | |
711 | flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | | |
712 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 PS |
713 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
714 | NTLMSSP_NEGOTIATE_SEAL; | |
f6a6bf7c | 715 | if (server->sign) |
745e507a | 716 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
f6a6bf7c | 717 | if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
cabfb368 | 718 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; |
0b3cc858 | 719 | |
49bd49f9 | 720 | tmp = *pbuffer + sizeof(NEGOTIATE_MESSAGE); |
df8fbc24 | 721 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 | 722 | |
49bd49f9 SP |
723 | /* these fields should be null in negotiate phase MS-NLMP 3.1.5.1.1 */ |
724 | cifs_security_buffer_from_str(&sec_blob->DomainName, | |
725 | NULL, | |
726 | CIFS_MAX_DOMAINNAME_LEN, | |
727 | *pbuffer, &tmp, | |
728 | nls_cp); | |
0b3cc858 | 729 | |
49bd49f9 SP |
730 | cifs_security_buffer_from_str(&sec_blob->WorkstationName, |
731 | NULL, | |
732 | CIFS_MAX_WORKSTATION_LEN, | |
733 | *pbuffer, &tmp, | |
734 | nls_cp); | |
b8da344b | 735 | |
49bd49f9 SP |
736 | *buflen = tmp - *pbuffer; |
737 | setup_ntlm_neg_ret: | |
738 | return rc; | |
b8da344b JM |
739 | } |
740 | ||
741 | int build_ntlmssp_auth_blob(unsigned char **pbuffer, | |
89f150f4 | 742 | u16 *buflen, |
96daf2b0 | 743 | struct cifs_ses *ses, |
2b149f11 | 744 | const struct nls_table *nls_cp) |
0b3cc858 | 745 | { |
2b149f11 | 746 | int rc; |
b8da344b | 747 | AUTHENTICATE_MESSAGE *sec_blob; |
0b3cc858 SF |
748 | __u32 flags; |
749 | unsigned char *tmp; | |
49bd49f9 | 750 | int len; |
0b3cc858 | 751 | |
b8da344b JM |
752 | rc = setup_ntlmv2_rsp(ses, nls_cp); |
753 | if (rc) { | |
754 | cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc); | |
755 | *buflen = 0; | |
756 | goto setup_ntlmv2_ret; | |
757 | } | |
49bd49f9 SP |
758 | |
759 | len = size_of_ntlmssp_blob(ses, sizeof(AUTHENTICATE_MESSAGE)); | |
760 | *pbuffer = kmalloc(len, GFP_KERNEL); | |
126c97f4 NMG |
761 | if (!*pbuffer) { |
762 | rc = -ENOMEM; | |
763 | cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc); | |
764 | *buflen = 0; | |
765 | goto setup_ntlmv2_ret; | |
766 | } | |
b8da344b JM |
767 | sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer; |
768 | ||
0b3cc858 SF |
769 | memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); |
770 | sec_blob->MessageType = NtLmAuthenticate; | |
771 | ||
772 | flags = NTLMSSP_NEGOTIATE_56 | | |
773 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | | |
774 | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | | |
cabfb368 | 775 | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | |
49bd49f9 | 776 | NTLMSSP_NEGOTIATE_SEAL | NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED; |
cabfb368 | 777 | if (ses->server->sign) |
0b3cc858 | 778 | flags |= NTLMSSP_NEGOTIATE_SIGN; |
cabfb368 PS |
779 | if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) |
780 | flags |= NTLMSSP_NEGOTIATE_KEY_XCH; | |
0b3cc858 | 781 | |
b8da344b | 782 | tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE); |
df8fbc24 | 783 | sec_blob->NegotiateFlags = cpu_to_le32(flags); |
0b3cc858 SF |
784 | |
785 | sec_blob->LmChallengeResponse.BufferOffset = | |
786 | cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); | |
787 | sec_blob->LmChallengeResponse.Length = 0; | |
788 | sec_blob->LmChallengeResponse.MaximumLength = 0; | |
789 | ||
b8da344b JM |
790 | sec_blob->NtChallengeResponse.BufferOffset = |
791 | cpu_to_le32(tmp - *pbuffer); | |
cfda35d9 | 792 | if (ses->user_name != NULL) { |
cfda35d9 SM |
793 | memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
794 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
795 | tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
796 | ||
797 | sec_blob->NtChallengeResponse.Length = | |
798 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
799 | sec_blob->NtChallengeResponse.MaximumLength = | |
800 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
801 | } else { | |
802 | /* | |
803 | * don't send an NT Response for anonymous access | |
804 | */ | |
805 | sec_blob->NtChallengeResponse.Length = 0; | |
806 | sec_blob->NtChallengeResponse.MaximumLength = 0; | |
2b149f11 | 807 | } |
0b3cc858 | 808 | |
49bd49f9 SP |
809 | cifs_security_buffer_from_str(&sec_blob->DomainName, |
810 | ses->domainName, | |
811 | CIFS_MAX_DOMAINNAME_LEN, | |
812 | *pbuffer, &tmp, | |
813 | nls_cp); | |
0b3cc858 | 814 | |
49bd49f9 SP |
815 | cifs_security_buffer_from_str(&sec_blob->UserName, |
816 | ses->user_name, | |
817 | CIFS_MAX_USERNAME_LEN, | |
818 | *pbuffer, &tmp, | |
819 | nls_cp); | |
0b3cc858 | 820 | |
49bd49f9 SP |
821 | cifs_security_buffer_from_str(&sec_blob->WorkstationName, |
822 | ses->workstation_name, | |
823 | CIFS_MAX_WORKSTATION_LEN, | |
824 | *pbuffer, &tmp, | |
825 | nls_cp); | |
0b3cc858 | 826 | |
df8fbc24 SP |
827 | if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || |
828 | (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) | |
829 | && !calc_seckey(ses)) { | |
d3686d54 | 830 | memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); |
b8da344b | 831 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
832 | sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); |
833 | sec_blob->SessionKey.MaximumLength = | |
834 | cpu_to_le16(CIFS_CPHTXT_SIZE); | |
835 | tmp += CIFS_CPHTXT_SIZE; | |
836 | } else { | |
b8da344b | 837 | sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer); |
d2b91521 SP |
838 | sec_blob->SessionKey.Length = 0; |
839 | sec_blob->SessionKey.MaximumLength = 0; | |
840 | } | |
2b149f11 | 841 | |
b8da344b | 842 | *buflen = tmp - *pbuffer; |
2b149f11 | 843 | setup_ntlmv2_ret: |
89f150f4 | 844 | return rc; |
0b3cc858 | 845 | } |
0b3cc858 | 846 | |
3f618223 | 847 | enum securityEnum |
ef65aaed | 848 | cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) |
3f618223 JL |
849 | { |
850 | switch (server->negflavor) { | |
851 | case CIFS_NEGFLAVOR_EXTENDED: | |
852 | switch (requested) { | |
853 | case Kerberos: | |
854 | case RawNTLMSSP: | |
855 | return requested; | |
856 | case Unspecified: | |
857 | if (server->sec_ntlmssp && | |
858 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
859 | return RawNTLMSSP; | |
860 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
861 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
862 | return Kerberos; | |
df561f66 | 863 | fallthrough; |
3f618223 JL |
864 | default: |
865 | return Unspecified; | |
866 | } | |
867 | case CIFS_NEGFLAVOR_UNENCAP: | |
868 | switch (requested) { | |
3f618223 JL |
869 | case NTLMv2: |
870 | return requested; | |
871 | case Unspecified: | |
872 | if (global_secflags & CIFSSEC_MAY_NTLMV2) | |
873 | return NTLMv2; | |
21ac58f4 | 874 | break; |
3f618223 | 875 | default: |
dde2356c | 876 | break; |
3f618223 | 877 | } |
76a3c92e | 878 | fallthrough; |
3f618223 JL |
879 | default: |
880 | return Unspecified; | |
881 | } | |
882 | } | |
883 | ||
80a0e637 SP |
884 | struct sess_data { |
885 | unsigned int xid; | |
886 | struct cifs_ses *ses; | |
887 | struct nls_table *nls_cp; | |
888 | void (*func)(struct sess_data *); | |
889 | int result; | |
890 | ||
891 | /* we will send the SMB in three pieces: | |
892 | * a fixed length beginning part, an optional | |
893 | * SPNEGO blob (which can be zero length), and a | |
894 | * last part which will include the strings | |
895 | * and rest of bcc area. This allows us to avoid | |
896 | * a large buffer 17K allocation | |
897 | */ | |
898 | int buf0_type; | |
899 | struct kvec iov[3]; | |
900 | }; | |
901 | ||
902 | static int | |
903 | sess_alloc_buffer(struct sess_data *sess_data, int wct) | |
904 | { | |
905 | int rc; | |
906 | struct cifs_ses *ses = sess_data->ses; | |
907 | struct smb_hdr *smb_buf; | |
908 | ||
909 | rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses, | |
910 | (void **)&smb_buf); | |
911 | ||
912 | if (rc) | |
913 | return rc; | |
914 | ||
915 | sess_data->iov[0].iov_base = (char *)smb_buf; | |
916 | sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4; | |
917 | /* | |
918 | * This variable will be used to clear the buffer | |
919 | * allocated above in case of any error in the calling function. | |
920 | */ | |
921 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
922 | ||
923 | /* 2000 big enough to fit max user, domain, NOS name etc. */ | |
924 | sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL); | |
925 | if (!sess_data->iov[2].iov_base) { | |
926 | rc = -ENOMEM; | |
927 | goto out_free_smb_buf; | |
928 | } | |
929 | ||
930 | return 0; | |
931 | ||
932 | out_free_smb_buf: | |
d72c7419 | 933 | cifs_small_buf_release(smb_buf); |
80a0e637 SP |
934 | sess_data->iov[0].iov_base = NULL; |
935 | sess_data->iov[0].iov_len = 0; | |
936 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
937 | return rc; | |
938 | } | |
939 | ||
940 | static void | |
941 | sess_free_buffer(struct sess_data *sess_data) | |
942 | { | |
943 | ||
944 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
945 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
946 | kfree(sess_data->iov[2].iov_base); | |
947 | } | |
948 | ||
949 | static int | |
950 | sess_establish_session(struct sess_data *sess_data) | |
951 | { | |
952 | struct cifs_ses *ses = sess_data->ses; | |
953 | ||
954 | mutex_lock(&ses->server->srv_mutex); | |
955 | if (!ses->server->session_estab) { | |
956 | if (ses->server->sign) { | |
957 | ses->server->session_key.response = | |
958 | kmemdup(ses->auth_key.response, | |
959 | ses->auth_key.len, GFP_KERNEL); | |
960 | if (!ses->server->session_key.response) { | |
961 | mutex_unlock(&ses->server->srv_mutex); | |
962 | return -ENOMEM; | |
963 | } | |
964 | ses->server->session_key.len = | |
965 | ses->auth_key.len; | |
966 | } | |
967 | ses->server->sequence_number = 0x2; | |
968 | ses->server->session_estab = true; | |
969 | } | |
970 | mutex_unlock(&ses->server->srv_mutex); | |
971 | ||
972 | cifs_dbg(FYI, "CIFS session established successfully\n"); | |
973 | spin_lock(&GlobalMid_Lock); | |
974 | ses->status = CifsGood; | |
975 | ses->need_reconnect = false; | |
976 | spin_unlock(&GlobalMid_Lock); | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | static int | |
982 | sess_sendreceive(struct sess_data *sess_data) | |
983 | { | |
984 | int rc; | |
985 | struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base; | |
986 | __u16 count; | |
da502f7d | 987 | struct kvec rsp_iov = { NULL, 0 }; |
80a0e637 SP |
988 | |
989 | count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len; | |
1a0e7f7c | 990 | be32_add_cpu(&smb_buf->smb_buf_length, count); |
80a0e637 SP |
991 | put_bcc(count, smb_buf); |
992 | ||
993 | rc = SendReceive2(sess_data->xid, sess_data->ses, | |
994 | sess_data->iov, 3 /* num_iovecs */, | |
995 | &sess_data->buf0_type, | |
da502f7d PS |
996 | CIFS_LOG_ERROR, &rsp_iov); |
997 | cifs_small_buf_release(sess_data->iov[0].iov_base); | |
998 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
80a0e637 SP |
999 | |
1000 | return rc; | |
1001 | } | |
1002 | ||
583cf7af SP |
1003 | static void |
1004 | sess_auth_ntlmv2(struct sess_data *sess_data) | |
1005 | { | |
1006 | int rc = 0; | |
1007 | struct smb_hdr *smb_buf; | |
1008 | SESSION_SETUP_ANDX *pSMB; | |
1009 | char *bcc_ptr; | |
1010 | struct cifs_ses *ses = sess_data->ses; | |
1011 | __u32 capabilities; | |
1012 | __u16 bytes_remaining; | |
1013 | ||
1014 | /* old style NTLM sessionsetup */ | |
1015 | /* wct = 13 */ | |
1016 | rc = sess_alloc_buffer(sess_data, 13); | |
1017 | if (rc) | |
1018 | goto out; | |
1019 | ||
1020 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1021 | bcc_ptr = sess_data->iov[2].iov_base; | |
1022 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1023 | ||
1024 | pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); | |
1025 | ||
1026 | /* LM2 password would be here if we supported it */ | |
1027 | pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; | |
1028 | ||
1a967d6c SM |
1029 | if (ses->user_name != NULL) { |
1030 | /* calculate nlmv2 response and session key */ | |
1031 | rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp); | |
1032 | if (rc) { | |
1033 | cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc); | |
1034 | goto out; | |
1035 | } | |
583cf7af | 1036 | |
1a967d6c SM |
1037 | memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
1038 | ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1039 | bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; | |
583cf7af | 1040 | |
1a967d6c SM |
1041 | /* set case sensitive password length after tilen may get |
1042 | * assigned, tilen is 0 otherwise. | |
1043 | */ | |
1044 | pSMB->req_no_secext.CaseSensitivePasswordLength = | |
1045 | cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); | |
1046 | } else { | |
1047 | pSMB->req_no_secext.CaseSensitivePasswordLength = 0; | |
1048 | } | |
583cf7af SP |
1049 | |
1050 | if (ses->capabilities & CAP_UNICODE) { | |
1051 | if (sess_data->iov[0].iov_len % 2) { | |
1052 | *bcc_ptr = 0; | |
1053 | bcc_ptr++; | |
1054 | } | |
1055 | unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1056 | } else { | |
1057 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1058 | } | |
1059 | ||
1060 | ||
1061 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1062 | (long) sess_data->iov[2].iov_base; | |
1063 | ||
1064 | rc = sess_sendreceive(sess_data); | |
1065 | if (rc) | |
1066 | goto out; | |
1067 | ||
1068 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1069 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1070 | ||
1071 | if (smb_buf->WordCount != 3) { | |
1072 | rc = -EIO; | |
1073 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1074 | goto out; | |
1075 | } | |
1076 | ||
1077 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1078 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1079 | ||
1080 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1081 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1082 | ||
1083 | bytes_remaining = get_bcc(smb_buf); | |
1084 | bcc_ptr = pByteArea(smb_buf); | |
1085 | ||
1086 | /* BB check if Unicode and decode strings */ | |
1087 | if (bytes_remaining == 0) { | |
1088 | /* no string area to decode, do nothing */ | |
1089 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1090 | /* unicode string area must be word-aligned */ | |
1091 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1092 | ++bcc_ptr; | |
1093 | --bytes_remaining; | |
1094 | } | |
1095 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1096 | sess_data->nls_cp); | |
1097 | } else { | |
1098 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1099 | sess_data->nls_cp); | |
1100 | } | |
1101 | ||
1102 | rc = sess_establish_session(sess_data); | |
1103 | out: | |
1104 | sess_data->result = rc; | |
1105 | sess_data->func = NULL; | |
1106 | sess_free_buffer(sess_data); | |
1107 | kfree(ses->auth_key.response); | |
1108 | ses->auth_key.response = NULL; | |
1109 | } | |
1110 | ||
ee03c646 SP |
1111 | #ifdef CONFIG_CIFS_UPCALL |
1112 | static void | |
1113 | sess_auth_kerberos(struct sess_data *sess_data) | |
1114 | { | |
1115 | int rc = 0; | |
1116 | struct smb_hdr *smb_buf; | |
1117 | SESSION_SETUP_ANDX *pSMB; | |
1118 | char *bcc_ptr; | |
1119 | struct cifs_ses *ses = sess_data->ses; | |
1120 | __u32 capabilities; | |
1121 | __u16 bytes_remaining; | |
1122 | struct key *spnego_key = NULL; | |
1123 | struct cifs_spnego_msg *msg; | |
1124 | u16 blob_len; | |
1125 | ||
1126 | /* extended security */ | |
1127 | /* wct = 12 */ | |
1128 | rc = sess_alloc_buffer(sess_data, 12); | |
1129 | if (rc) | |
1130 | goto out; | |
1131 | ||
1132 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1133 | bcc_ptr = sess_data->iov[2].iov_base; | |
1134 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1135 | ||
1136 | spnego_key = cifs_get_spnego_key(ses); | |
1137 | if (IS_ERR(spnego_key)) { | |
1138 | rc = PTR_ERR(spnego_key); | |
1139 | spnego_key = NULL; | |
1140 | goto out; | |
1141 | } | |
1142 | ||
146aa8b1 | 1143 | msg = spnego_key->payload.data[0]; |
ee03c646 SP |
1144 | /* |
1145 | * check version field to make sure that cifs.upcall is | |
1146 | * sending us a response in an expected form | |
1147 | */ | |
1148 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
a0a3036b JP |
1149 | cifs_dbg(VFS, "incorrect version of cifs.upcall (expected %d but got %d)\n", |
1150 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
ee03c646 SP |
1151 | rc = -EKEYREJECTED; |
1152 | goto out_put_spnego_key; | |
1153 | } | |
1154 | ||
1155 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
1156 | GFP_KERNEL); | |
1157 | if (!ses->auth_key.response) { | |
a0a3036b JP |
1158 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", |
1159 | msg->sesskey_len); | |
ee03c646 SP |
1160 | rc = -ENOMEM; |
1161 | goto out_put_spnego_key; | |
1162 | } | |
1163 | ses->auth_key.len = msg->sesskey_len; | |
1164 | ||
1165 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; | |
1166 | capabilities |= CAP_EXTENDED_SECURITY; | |
1167 | pSMB->req.Capabilities = cpu_to_le32(capabilities); | |
1168 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1169 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1170 | pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len); | |
1171 | ||
1172 | if (ses->capabilities & CAP_UNICODE) { | |
1173 | /* unicode strings must be word aligned */ | |
1174 | if ((sess_data->iov[0].iov_len | |
1175 | + sess_data->iov[1].iov_len) % 2) { | |
1176 | *bcc_ptr = 0; | |
1177 | bcc_ptr++; | |
1178 | } | |
1179 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); | |
1180 | unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp); | |
1181 | } else { | |
1182 | /* BB: is this right? */ | |
1183 | ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp); | |
1184 | } | |
1185 | ||
1186 | sess_data->iov[2].iov_len = (long) bcc_ptr - | |
1187 | (long) sess_data->iov[2].iov_base; | |
1188 | ||
1189 | rc = sess_sendreceive(sess_data); | |
1190 | if (rc) | |
1191 | goto out_put_spnego_key; | |
1192 | ||
1193 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1194 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
1195 | ||
1196 | if (smb_buf->WordCount != 4) { | |
1197 | rc = -EIO; | |
1198 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1199 | goto out_put_spnego_key; | |
1200 | } | |
1201 | ||
1202 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
1203 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ | |
1204 | ||
1205 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ | |
1206 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
1207 | ||
1208 | bytes_remaining = get_bcc(smb_buf); | |
1209 | bcc_ptr = pByteArea(smb_buf); | |
1210 | ||
1211 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); | |
1212 | if (blob_len > bytes_remaining) { | |
1213 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1214 | blob_len); | |
1215 | rc = -EINVAL; | |
1216 | goto out_put_spnego_key; | |
1217 | } | |
1218 | bcc_ptr += blob_len; | |
1219 | bytes_remaining -= blob_len; | |
1220 | ||
1221 | /* BB check if Unicode and decode strings */ | |
1222 | if (bytes_remaining == 0) { | |
1223 | /* no string area to decode, do nothing */ | |
1224 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
1225 | /* unicode string area must be word-aligned */ | |
1226 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1227 | ++bcc_ptr; | |
1228 | --bytes_remaining; | |
1229 | } | |
1230 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1231 | sess_data->nls_cp); | |
1232 | } else { | |
1233 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, | |
1234 | sess_data->nls_cp); | |
1235 | } | |
1236 | ||
1237 | rc = sess_establish_session(sess_data); | |
1238 | out_put_spnego_key: | |
1239 | key_invalidate(spnego_key); | |
1240 | key_put(spnego_key); | |
1241 | out: | |
1242 | sess_data->result = rc; | |
1243 | sess_data->func = NULL; | |
1244 | sess_free_buffer(sess_data); | |
1245 | kfree(ses->auth_key.response); | |
1246 | ses->auth_key.response = NULL; | |
1247 | } | |
1248 | ||
ee03c646 | 1249 | #endif /* ! CONFIG_CIFS_UPCALL */ |
583cf7af | 1250 | |
cc87c47d SP |
1251 | /* |
1252 | * The required kvec buffers have to be allocated before calling this | |
1253 | * function. | |
1254 | */ | |
1255 | static int | |
1256 | _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data) | |
3979877e | 1257 | { |
3979877e | 1258 | SESSION_SETUP_ANDX *pSMB; |
cc87c47d | 1259 | struct cifs_ses *ses = sess_data->ses; |
3979877e | 1260 | __u32 capabilities; |
cc87c47d | 1261 | char *bcc_ptr; |
254e55ed | 1262 | |
cc87c47d | 1263 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
cc87c47d SP |
1264 | |
1265 | capabilities = cifs_ssetup_hdr(ses, pSMB); | |
1266 | if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { | |
1267 | cifs_dbg(VFS, "NTLMSSP requires Unicode support\n"); | |
1268 | return -ENOSYS; | |
3534b850 | 1269 | } |
3979877e | 1270 | |
cc87c47d SP |
1271 | pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; |
1272 | capabilities |= CAP_EXTENDED_SECURITY; | |
1273 | pSMB->req.Capabilities |= cpu_to_le32(capabilities); | |
80a0e637 | 1274 | |
cc87c47d SP |
1275 | bcc_ptr = sess_data->iov[2].iov_base; |
1276 | /* unicode strings must be word aligned */ | |
1277 | if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) { | |
1278 | *bcc_ptr = 0; | |
1279 | bcc_ptr++; | |
3f618223 | 1280 | } |
cc87c47d | 1281 | unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp); |
3f618223 | 1282 | |
cc87c47d SP |
1283 | sess_data->iov[2].iov_len = (long) bcc_ptr - |
1284 | (long) sess_data->iov[2].iov_base; | |
80a0e637 | 1285 | |
cc87c47d SP |
1286 | return 0; |
1287 | } | |
1288 | ||
1289 | static void | |
1290 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data); | |
1291 | ||
1292 | static void | |
1293 | sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data) | |
1294 | { | |
1295 | int rc; | |
1296 | struct smb_hdr *smb_buf; | |
1297 | SESSION_SETUP_ANDX *pSMB; | |
1298 | struct cifs_ses *ses = sess_data->ses; | |
1299 | __u16 bytes_remaining; | |
1300 | char *bcc_ptr; | |
49bd49f9 | 1301 | unsigned char *ntlmsspblob = NULL; |
cc87c47d SP |
1302 | u16 blob_len; |
1303 | ||
1304 | cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n"); | |
5c234aa5 | 1305 | |
cc87c47d SP |
1306 | /* |
1307 | * if memory allocation is successful, caller of this function | |
1308 | * frees it. | |
1309 | */ | |
1310 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
1311 | if (!ses->ntlmssp) { | |
1312 | rc = -ENOMEM; | |
1313 | goto out; | |
d3686d54 | 1314 | } |
cc87c47d | 1315 | ses->ntlmssp->sesskey_per_smbsess = false; |
d3686d54 | 1316 | |
cc87c47d SP |
1317 | /* wct = 12 */ |
1318 | rc = sess_alloc_buffer(sess_data, 12); | |
1319 | if (rc) | |
1320 | goto out; | |
0b3cc858 | 1321 | |
cc87c47d | 1322 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
3979877e | 1323 | |
cc87c47d | 1324 | /* Build security blob before we assemble the request */ |
49bd49f9 SP |
1325 | rc = build_ntlmssp_negotiate_blob(&ntlmsspblob, |
1326 | &blob_len, ses, | |
1327 | sess_data->nls_cp); | |
1328 | if (rc) | |
1329 | goto out; | |
1330 | ||
1331 | sess_data->iov[1].iov_len = blob_len; | |
1332 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1333 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
cc87c47d SP |
1334 | |
1335 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
790fe579 | 1336 | if (rc) |
cc87c47d | 1337 | goto out; |
3979877e | 1338 | |
cc87c47d | 1339 | rc = sess_sendreceive(sess_data); |
3979877e | 1340 | |
cc87c47d SP |
1341 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; |
1342 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
750d1151 | 1343 | |
cc87c47d SP |
1344 | /* If true, rc here is expected and not an error */ |
1345 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
1346 | smb_buf->Status.CifsError == | |
1347 | cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)) | |
1348 | rc = 0; | |
2442421b | 1349 | |
cc87c47d SP |
1350 | if (rc) |
1351 | goto out; | |
1352 | ||
1353 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); | |
1354 | ||
1355 | if (smb_buf->WordCount != 4) { | |
1356 | rc = -EIO; | |
1357 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); | |
1358 | goto out; | |
5e6e6232 | 1359 | } |
3979877e | 1360 | |
cc87c47d SP |
1361 | ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */ |
1362 | cifs_dbg(FYI, "UID = %llu\n", ses->Suid); | |
2442421b | 1363 | |
cc87c47d SP |
1364 | bytes_remaining = get_bcc(smb_buf); |
1365 | bcc_ptr = pByteArea(smb_buf); | |
b4d6fcf1 | 1366 | |
cc87c47d SP |
1367 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1368 | if (blob_len > bytes_remaining) { | |
1369 | cifs_dbg(VFS, "bad security blob length %d\n", | |
1370 | blob_len); | |
1371 | rc = -EINVAL; | |
1372 | goto out; | |
1373 | } | |
0b3cc858 | 1374 | |
cc87c47d SP |
1375 | rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses); |
1376 | out: | |
1377 | sess_free_buffer(sess_data); | |
1378 | ||
1379 | if (!rc) { | |
1380 | sess_data->func = sess_auth_rawntlmssp_authenticate; | |
1381 | return; | |
3979877e SF |
1382 | } |
1383 | ||
cc87c47d SP |
1384 | /* Else error. Cleanup */ |
1385 | kfree(ses->auth_key.response); | |
1386 | ses->auth_key.response = NULL; | |
1387 | kfree(ses->ntlmssp); | |
1388 | ses->ntlmssp = NULL; | |
2442421b | 1389 | |
cc87c47d SP |
1390 | sess_data->func = NULL; |
1391 | sess_data->result = rc; | |
1392 | } | |
3979877e | 1393 | |
cc87c47d SP |
1394 | static void |
1395 | sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data) | |
1396 | { | |
1397 | int rc; | |
1398 | struct smb_hdr *smb_buf; | |
1399 | SESSION_SETUP_ANDX *pSMB; | |
1400 | struct cifs_ses *ses = sess_data->ses; | |
1401 | __u16 bytes_remaining; | |
1402 | char *bcc_ptr; | |
b8da344b | 1403 | unsigned char *ntlmsspblob = NULL; |
cc87c47d | 1404 | u16 blob_len; |
3979877e | 1405 | |
cc87c47d | 1406 | cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n"); |
3979877e | 1407 | |
cc87c47d SP |
1408 | /* wct = 12 */ |
1409 | rc = sess_alloc_buffer(sess_data, 12); | |
1410 | if (rc) | |
1411 | goto out; | |
3979877e | 1412 | |
cc87c47d SP |
1413 | /* Build security blob before we assemble the request */ |
1414 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1415 | smb_buf = (struct smb_hdr *)pSMB; | |
b8da344b | 1416 | rc = build_ntlmssp_auth_blob(&ntlmsspblob, |
cc87c47d SP |
1417 | &blob_len, ses, sess_data->nls_cp); |
1418 | if (rc) | |
1419 | goto out_free_ntlmsspblob; | |
1420 | sess_data->iov[1].iov_len = blob_len; | |
1421 | sess_data->iov[1].iov_base = ntlmsspblob; | |
1422 | pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); | |
1423 | /* | |
1424 | * Make sure that we tell the server that we are using | |
1425 | * the uid that it just gave us back on the response | |
1426 | * (challenge) | |
1427 | */ | |
1428 | smb_buf->Uid = ses->Suid; | |
1429 | ||
1430 | rc = _sess_auth_rawntlmssp_assemble_req(sess_data); | |
0b3cc858 | 1431 | if (rc) |
cc87c47d | 1432 | goto out_free_ntlmsspblob; |
0b3cc858 | 1433 | |
cc87c47d SP |
1434 | rc = sess_sendreceive(sess_data); |
1435 | if (rc) | |
1436 | goto out_free_ntlmsspblob; | |
1437 | ||
1438 | pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; | |
1439 | smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base; | |
583cf7af | 1440 | if (smb_buf->WordCount != 4) { |
3979877e | 1441 | rc = -EIO; |
f96637be | 1442 | cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount); |
cc87c47d | 1443 | goto out_free_ntlmsspblob; |
3979877e | 1444 | } |
cc87c47d SP |
1445 | |
1446 | if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN) | |
f96637be | 1447 | cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */ |
cc87c47d | 1448 | |
ee9bbf46 SP |
1449 | if (ses->Suid != smb_buf->Uid) { |
1450 | ses->Suid = smb_buf->Uid; | |
1451 | cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid); | |
1452 | } | |
1453 | ||
690c522f | 1454 | bytes_remaining = get_bcc(smb_buf); |
3979877e | 1455 | bcc_ptr = pByteArea(smb_buf); |
583cf7af SP |
1456 | blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength); |
1457 | if (blob_len > bytes_remaining) { | |
1458 | cifs_dbg(VFS, "bad security blob length %d\n", | |
cc87c47d | 1459 | blob_len); |
583cf7af | 1460 | rc = -EINVAL; |
cc87c47d | 1461 | goto out_free_ntlmsspblob; |
790fe579 | 1462 | } |
583cf7af SP |
1463 | bcc_ptr += blob_len; |
1464 | bytes_remaining -= blob_len; | |
3979877e | 1465 | |
cc87c47d | 1466 | |
3979877e | 1467 | /* BB check if Unicode and decode strings */ |
fcda7f45 JL |
1468 | if (bytes_remaining == 0) { |
1469 | /* no string area to decode, do nothing */ | |
1470 | } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) { | |
27b87fe5 JL |
1471 | /* unicode string area must be word-aligned */ |
1472 | if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) { | |
1473 | ++bcc_ptr; | |
1474 | --bytes_remaining; | |
1475 | } | |
cc87c47d SP |
1476 | decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, |
1477 | sess_data->nls_cp); | |
27b87fe5 | 1478 | } else { |
cc87c47d SP |
1479 | decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, |
1480 | sess_data->nls_cp); | |
27b87fe5 | 1481 | } |
50c2f753 | 1482 | |
cc87c47d | 1483 | out_free_ntlmsspblob: |
2b149f11 | 1484 | kfree(ntlmsspblob); |
cc87c47d SP |
1485 | out: |
1486 | sess_free_buffer(sess_data); | |
d4e63bd6 | 1487 | |
cc87c47d SP |
1488 | if (!rc) |
1489 | rc = sess_establish_session(sess_data); | |
d4e63bd6 | 1490 | |
cc87c47d | 1491 | /* Cleanup */ |
d4e63bd6 SP |
1492 | kfree(ses->auth_key.response); |
1493 | ses->auth_key.response = NULL; | |
1494 | kfree(ses->ntlmssp); | |
cc87c47d | 1495 | ses->ntlmssp = NULL; |
d4e63bd6 | 1496 | |
cc87c47d SP |
1497 | sess_data->func = NULL; |
1498 | sess_data->result = rc; | |
1499 | } | |
80a0e637 | 1500 | |
27924075 | 1501 | static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data) |
cc87c47d SP |
1502 | { |
1503 | int type; | |
1504 | ||
ef65aaed | 1505 | type = cifs_select_sectype(ses->server, ses->sectype); |
cc87c47d SP |
1506 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1507 | if (type == Unspecified) { | |
a0a3036b | 1508 | cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); |
cc87c47d SP |
1509 | return -EINVAL; |
1510 | } | |
1511 | ||
1512 | switch (type) { | |
cc87c47d SP |
1513 | case NTLMv2: |
1514 | sess_data->func = sess_auth_ntlmv2; | |
1515 | break; | |
1516 | case Kerberos: | |
1517 | #ifdef CONFIG_CIFS_UPCALL | |
1518 | sess_data->func = sess_auth_kerberos; | |
1519 | break; | |
1520 | #else | |
1521 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1522 | return -ENOSYS; | |
cc87c47d SP |
1523 | #endif /* CONFIG_CIFS_UPCALL */ |
1524 | case RawNTLMSSP: | |
1525 | sess_data->func = sess_auth_rawntlmssp_negotiate; | |
1526 | break; | |
1527 | default: | |
1528 | cifs_dbg(VFS, "secType %d not supported!\n", type); | |
1529 | return -ENOSYS; | |
1530 | } | |
1531 | ||
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, | |
1536 | const struct nls_table *nls_cp) | |
1537 | { | |
1538 | int rc = 0; | |
1539 | struct sess_data *sess_data; | |
1540 | ||
1541 | if (ses == NULL) { | |
1542 | WARN(1, "%s: ses == NULL!", __func__); | |
1543 | return -EINVAL; | |
1544 | } | |
1545 | ||
1546 | sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL); | |
1547 | if (!sess_data) | |
1548 | return -ENOMEM; | |
1549 | ||
1550 | rc = select_sec(ses, sess_data); | |
1551 | if (rc) | |
1552 | goto out; | |
1553 | ||
1554 | sess_data->xid = xid; | |
1555 | sess_data->ses = ses; | |
1556 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1557 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
1558 | ||
1559 | while (sess_data->func) | |
1560 | sess_data->func(sess_data); | |
1561 | ||
1562 | /* Store result before we free sess_data */ | |
80a0e637 | 1563 | rc = sess_data->result; |
cc87c47d SP |
1564 | |
1565 | out: | |
80a0e637 SP |
1566 | kfree(sess_data); |
1567 | return rc; | |
3979877e | 1568 | } |