1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
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"
31#include <linux/utsname.h>
32#include <linux/slab.h>
33#include "cifs_spnego.h"
34
35static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB)
36{
37 __u32 capabilities = 0;
38
39
40
41
42
43
44 pSMB->req.AndXCommand = 0xFF;
45 pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32,
46 CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4,
47 USHRT_MAX));
48 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
49 pSMB->req.VcNumber = cpu_to_le16(1);
50
51
52
53
54
55
56 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
57 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
58
59 if (ses->server->sign)
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 }
74 if (ses->capabilities & CAP_UNIX)
75 capabilities |= CAP_UNIX;
76
77 return capabilities;
78}
79
80static void
81unicode_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
87 bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32,
88 nls_cp);
89 bcc_ptr += 2 * bytes_ret;
90 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release,
91 32, nls_cp);
92 bcc_ptr += 2 * bytes_ret;
93 bcc_ptr += 2;
94
95 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
96 32, nls_cp);
97 bcc_ptr += 2 * bytes_ret;
98 bcc_ptr += 2;
99
100 *pbcc_area = bcc_ptr;
101}
102
103static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses,
104 const struct nls_table *nls_cp)
105{
106 char *bcc_ptr = *pbcc_area;
107 int bytes_ret = 0;
108
109
110 if (ses->domainName == NULL) {
111
112
113 *bcc_ptr = 0;
114 *(bcc_ptr+1) = 0;
115 bytes_ret = 0;
116 } else
117 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName,
118 CIFS_MAX_DOMAINNAME_LEN, nls_cp);
119 bcc_ptr += 2 * bytes_ret;
120 bcc_ptr += 2;
121
122 *pbcc_area = bcc_ptr;
123}
124
125
126static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
127 const struct nls_table *nls_cp)
128{
129 char *bcc_ptr = *pbcc_area;
130 int bytes_ret = 0;
131
132
133
134
135
136
137
138
139
140
141 if (ses->user_name == NULL) {
142
143 *bcc_ptr = 0;
144 *(bcc_ptr+1) = 0;
145 } else {
146 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name,
147 CIFS_MAX_USERNAME_LEN, nls_cp);
148 }
149 bcc_ptr += 2 * bytes_ret;
150 bcc_ptr += 2;
151
152 unicode_domain_string(&bcc_ptr, ses, nls_cp);
153 unicode_oslm_strings(&bcc_ptr, nls_cp);
154
155 *pbcc_area = bcc_ptr;
156}
157
158static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
159 const struct nls_table *nls_cp)
160{
161 char *bcc_ptr = *pbcc_area;
162 int len;
163
164
165
166
167 if (ses->user_name != NULL) {
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;
172 }
173
174 *bcc_ptr = 0;
175 bcc_ptr++;
176
177
178 if (ses->domainName != NULL) {
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;
183 }
184
185 *bcc_ptr = 0;
186 bcc_ptr++;
187
188
189
190 strcpy(bcc_ptr, "Linux version ");
191 bcc_ptr += strlen("Linux version ");
192 strcpy(bcc_ptr, init_utsname()->release);
193 bcc_ptr += strlen(init_utsname()->release) + 1;
194
195 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
196 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
197
198 *pbcc_area = bcc_ptr;
199}
200
201static void
202decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses,
203 const struct nls_table *nls_cp)
204{
205 int len;
206 char *data = *pbcc_area;
207
208 cifs_dbg(FYI, "bleft %d\n", bleft);
209
210 kfree(ses->serverOS);
211 ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
212 cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS);
213 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
214 data += len;
215 bleft -= len;
216 if (bleft <= 0)
217 return;
218
219 kfree(ses->serverNOS);
220 ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
221 cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS);
222 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
223 data += len;
224 bleft -= len;
225 if (bleft <= 0)
226 return;
227
228 kfree(ses->serverDomain);
229 ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
230 cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain);
231
232 return;
233}
234
235static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
236 struct cifs_ses *ses,
237 const struct nls_table *nls_cp)
238{
239 int len;
240 char *bcc_ptr = *pbcc_area;
241
242 cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft);
243
244 len = strnlen(bcc_ptr, bleft);
245 if (len >= bleft)
246 return;
247
248 kfree(ses->serverOS);
249
250 ses->serverOS = kmalloc(len + 1, GFP_KERNEL);
251 if (ses->serverOS) {
252 memcpy(ses->serverOS, bcc_ptr, len);
253 ses->serverOS[len] = 0;
254 if (strncmp(ses->serverOS, "OS/2", 4) == 0)
255 cifs_dbg(FYI, "OS/2 server\n");
256 }
257
258 bcc_ptr += len + 1;
259 bleft -= len + 1;
260
261 len = strnlen(bcc_ptr, bleft);
262 if (len >= bleft)
263 return;
264
265 kfree(ses->serverNOS);
266
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 }
272
273 bcc_ptr += len + 1;
274 bleft -= len + 1;
275
276 len = strnlen(bcc_ptr, bleft);
277 if (len > bleft)
278 return;
279
280
281
282
283
284
285 cifs_dbg(FYI, "ascii: bytes left %d\n", bleft);
286}
287
288int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
289 struct cifs_ses *ses)
290{
291 unsigned int tioffset;
292 unsigned int tilen;
293
294 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
295
296 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
297 cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len);
298 return -EINVAL;
299 }
300
301 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
302 cifs_dbg(VFS, "blob signature incorrect %s\n",
303 pblob->Signature);
304 return -EINVAL;
305 }
306 if (pblob->MessageType != NtLmChallenge) {
307 cifs_dbg(VFS, "Incorrect message type %d\n",
308 pblob->MessageType);
309 return -EINVAL;
310 }
311
312 memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
313
314
315
316
317 ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags);
318 tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset);
319 tilen = le16_to_cpu(pblob->TargetInfoArray.Length);
320 if (tioffset > blob_len || tioffset + tilen > blob_len) {
321 cifs_dbg(VFS, "tioffset + tilen too high %u + %u",
322 tioffset, tilen);
323 return -EINVAL;
324 }
325 if (tilen) {
326 ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen,
327 GFP_KERNEL);
328 if (!ses->auth_key.response) {
329 cifs_dbg(VFS, "Challenge target info alloc failure");
330 return -ENOMEM;
331 }
332 ses->auth_key.len = tilen;
333 }
334
335 return 0;
336}
337
338
339
340
341
342void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
343 struct cifs_ses *ses)
344{
345 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
346 __u32 flags;
347
348 memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
349 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
350 sec_blob->MessageType = NtLmNegotiate;
351
352
353 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
354 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
355 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
356 NTLMSSP_NEGOTIATE_SEAL;
357 if (ses->server->sign)
358 flags |= NTLMSSP_NEGOTIATE_SIGN;
359 if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
360 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
361
362 sec_blob->NegotiateFlags = cpu_to_le32(flags);
363
364 sec_blob->WorkstationName.BufferOffset = 0;
365 sec_blob->WorkstationName.Length = 0;
366 sec_blob->WorkstationName.MaximumLength = 0;
367
368
369 sec_blob->DomainName.BufferOffset = 0;
370 sec_blob->DomainName.Length = 0;
371 sec_blob->DomainName.MaximumLength = 0;
372}
373
374static 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
392int build_ntlmssp_auth_blob(unsigned char **pbuffer,
393 u16 *buflen,
394 struct cifs_ses *ses,
395 const struct nls_table *nls_cp)
396{
397 int rc;
398 AUTHENTICATE_MESSAGE *sec_blob;
399 __u32 flags;
400 unsigned char *tmp;
401
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);
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 }
415 sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
416
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 |
423 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
424 NTLMSSP_NEGOTIATE_SEAL;
425 if (ses->server->sign)
426 flags |= NTLMSSP_NEGOTIATE_SIGN;
427 if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
428 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
429
430 tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE);
431 sec_blob->NegotiateFlags = cpu_to_le32(flags);
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
438 sec_blob->NtChallengeResponse.BufferOffset =
439 cpu_to_le32(tmp - *pbuffer);
440 if (ses->user_name != NULL) {
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
452
453 sec_blob->NtChallengeResponse.Length = 0;
454 sec_blob->NtChallengeResponse.MaximumLength = 0;
455 }
456
457 if (ses->domainName == NULL) {
458 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
459 sec_blob->DomainName.Length = 0;
460 sec_blob->DomainName.MaximumLength = 0;
461 tmp += 2;
462 } else {
463 int len;
464 len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
465 CIFS_MAX_DOMAINNAME_LEN, nls_cp);
466 len *= 2;
467 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
468 sec_blob->DomainName.Length = cpu_to_le16(len);
469 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
470 tmp += len;
471 }
472
473 if (ses->user_name == NULL) {
474 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
475 sec_blob->UserName.Length = 0;
476 sec_blob->UserName.MaximumLength = 0;
477 tmp += 2;
478 } else {
479 int len;
480 len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
481 CIFS_MAX_USERNAME_LEN, nls_cp);
482 len *= 2;
483 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
484 sec_blob->UserName.Length = cpu_to_le16(len);
485 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
486 tmp += len;
487 }
488
489 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
490 sec_blob->WorkstationName.Length = 0;
491 sec_blob->WorkstationName.MaximumLength = 0;
492 tmp += 2;
493
494 if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
495 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
496 && !calc_seckey(ses)) {
497 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
498 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
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 {
504 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
505 sec_blob->SessionKey.Length = 0;
506 sec_blob->SessionKey.MaximumLength = 0;
507 }
508
509 *buflen = tmp - *pbuffer;
510setup_ntlmv2_ret:
511 return rc;
512}
513
514enum securityEnum
515cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
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
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;
544 default:
545 break;
546 }
547
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
556 default:
557 return Unspecified;
558 }
559 default:
560 return Unspecified;
561 }
562}
563
564struct 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
572
573
574
575
576
577
578 int buf0_type;
579 struct kvec iov[3];
580};
581
582static int
583sess_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
599
600
601 sess_data->buf0_type = CIFS_SMALL_BUFFER;
602
603
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
612out_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
620static void
621sess_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
629static int
630sess_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
661static int
662sess_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;
667 struct kvec rsp_iov = { NULL, 0 };
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 ,
676 &sess_data->buf0_type,
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));
680
681 return rc;
682}
683
684
685
686
687
688
689
690
691#ifdef CONFIG_CIFS_WEAK_PW_HASH
692static void
693sess_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
705
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
716 if (ses->user_name != NULL) {
717
718 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
719
720
721
722
723
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);
728 if (rc)
729 goto out;
730
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 }
736
737
738
739
740
741
742
743
744 cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n");
745
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
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");
767
768 ses->Suid = smb_buf->Uid;
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
775 if (bytes_remaining == 0) {
776
777 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
778
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);
791out:
792 sess_data->result = rc;
793 sess_data->func = NULL;
794 sess_free_buffer(sess_data);
795}
796
797#endif
798
799static void
800sess_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
811
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);
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
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 }
834
835
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 }
846
847 if (ses->capabilities & CAP_UNICODE) {
848
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");
877
878 ses->Suid = smb_buf->Uid;
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
885 if (bytes_remaining == 0) {
886
887 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
888
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);
901out:
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
909static void
910sess_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
921
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
933 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
934
935 if (ses->user_name != NULL) {
936
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 }
942
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;
946
947
948
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 }
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");
985
986 ses->Suid = smb_buf->Uid;
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
993 if (bytes_remaining == 0) {
994
995 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
996
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);
1009out:
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
1017#ifdef CONFIG_CIFS_UPCALL
1018static void
1019sess_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
1033
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
1049 msg = spnego_key->payload.data[0];
1050
1051
1052
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
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
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");
1111
1112 ses->Suid = smb_buf->Uid;
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
1129 if (bytes_remaining == 0) {
1130
1131 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
1132
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);
1145out_put_spnego_key:
1146 key_invalidate(spnego_key);
1147 key_put(spnego_key);
1148out:
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
1156#endif
1157
1158
1159
1160
1161
1162static int
1163_sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data)
1164{
1165 SESSION_SETUP_ANDX *pSMB;
1166 struct cifs_ses *ses = sess_data->ses;
1167 __u32 capabilities;
1168 char *bcc_ptr;
1169
1170 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
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;
1176 }
1177
1178 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
1179 capabilities |= CAP_EXTENDED_SECURITY;
1180 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
1181
1182 bcc_ptr = sess_data->iov[2].iov_base;
1183
1184 if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) {
1185 *bcc_ptr = 0;
1186 bcc_ptr++;
1187 }
1188 unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
1189
1190 sess_data->iov[2].iov_len = (long) bcc_ptr -
1191 (long) sess_data->iov[2].iov_base;
1192
1193 return 0;
1194}
1195
1196static void
1197sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data);
1198
1199static void
1200sess_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");
1211
1212
1213
1214
1215
1216 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1217 if (!ses->ntlmssp) {
1218 rc = -ENOMEM;
1219 goto out;
1220 }
1221 ses->ntlmssp->sesskey_per_smbsess = false;
1222
1223
1224 rc = sess_alloc_buffer(sess_data, 12);
1225 if (rc)
1226 goto out;
1227
1228 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1229
1230
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);
1237 if (rc)
1238 goto out;
1239
1240 rc = sess_sendreceive(sess_data);
1241
1242 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1243 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1244
1245
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;
1250
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;
1260 }
1261
1262 ses->Suid = smb_buf->Uid;
1263 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
1264
1265 bytes_remaining = get_bcc(smb_buf);
1266 bcc_ptr = pByteArea(smb_buf);
1267
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 }
1275
1276 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
1277out:
1278 sess_free_buffer(sess_data);
1279
1280 if (!rc) {
1281 sess_data->func = sess_auth_rawntlmssp_authenticate;
1282 return;
1283 }
1284
1285
1286 kfree(ses->auth_key.response);
1287 ses->auth_key.response = NULL;
1288 kfree(ses->ntlmssp);
1289 ses->ntlmssp = NULL;
1290
1291 sess_data->func = NULL;
1292 sess_data->result = rc;
1293}
1294
1295static void
1296sess_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;
1304 unsigned char *ntlmsspblob = NULL;
1305 u16 blob_len;
1306
1307 cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n");
1308
1309
1310 rc = sess_alloc_buffer(sess_data, 12);
1311 if (rc)
1312 goto out;
1313
1314
1315 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1316 smb_buf = (struct smb_hdr *)pSMB;
1317 rc = build_ntlmssp_auth_blob(&ntlmsspblob,
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
1326
1327
1328
1329 smb_buf->Uid = ses->Suid;
1330
1331 rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
1332 if (rc)
1333 goto out_free_ntlmsspblob;
1334
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;
1341 if (smb_buf->WordCount != 4) {
1342 rc = -EIO;
1343 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1344 goto out_free_ntlmsspblob;
1345 }
1346
1347 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
1348 cifs_dbg(FYI, "Guest login\n");
1349
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
1355 bytes_remaining = get_bcc(smb_buf);
1356 bcc_ptr = pByteArea(smb_buf);
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",
1360 blob_len);
1361 rc = -EINVAL;
1362 goto out_free_ntlmsspblob;
1363 }
1364 bcc_ptr += blob_len;
1365 bytes_remaining -= blob_len;
1366
1367
1368
1369 if (bytes_remaining == 0) {
1370
1371 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
1372
1373 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
1374 ++bcc_ptr;
1375 --bytes_remaining;
1376 }
1377 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
1378 sess_data->nls_cp);
1379 } else {
1380 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
1381 sess_data->nls_cp);
1382 }
1383
1384out_free_ntlmsspblob:
1385 kfree(ntlmsspblob);
1386out:
1387 sess_free_buffer(sess_data);
1388
1389 if (!rc)
1390 rc = sess_establish_session(sess_data);
1391
1392
1393 kfree(ses->auth_key.response);
1394 ses->auth_key.response = NULL;
1395 kfree(ses->ntlmssp);
1396 ses->ntlmssp = NULL;
1397
1398 sess_data->func = NULL;
1399 sess_data->result = rc;
1400}
1401
1402static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data)
1403{
1404 int type;
1405
1406 type = cifs_select_sectype(ses->server, ses->sectype);
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
1417
1418
1419
1420
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
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
1453int 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
1481 rc = sess_data->result;
1482
1483out:
1484 kfree(sess_data);
1485 return rc;
1486}
1487