4 * SMB/CIFS session setup handling routines
6 * Copyright (c) International Business Machines Corp., 2006, 2009
7 * Author(s): Steve French (sfrench@us.ibm.com)
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include "cifsproto.h"
27 #include "cifs_unicode.h"
28 #include "cifs_debug.h"
31 #include <linux/utsname.h>
32 #include <linux/slab.h>
33 #include "cifs_spnego.h"
35 extern void SMBNTencrypt(unsigned char *passwd
, unsigned char *c8
,
39 * Checks if this is the first smb session to be reconnected after
40 * the socket has been reestablished (so we know whether to use vc 0).
41 * Called while holding the cifs_tcp_ses_lock, so do not block
43 static bool is_first_ses_reconnect(struct cifsSesInfo
*ses
)
45 struct list_head
*tmp
;
46 struct cifsSesInfo
*tmp_ses
;
48 list_for_each(tmp
, &ses
->server
->smb_ses_list
) {
49 tmp_ses
= list_entry(tmp
, struct cifsSesInfo
,
51 if (tmp_ses
->need_reconnect
== false)
54 /* could not find a session that was already connected,
55 this must be the first one we are reconnecting */
60 * vc number 0 is treated specially by some servers, and should be the
61 * first one we request. After that we can use vcnumbers up to maxvcs,
62 * one for each smb session (some Windows versions set maxvcs incorrectly
63 * so maxvc=1 can be ignored). If we have too many vcs, we can reuse
64 * any vc but zero (some servers reset the connection on vcnum zero)
67 static __le16
get_next_vcnum(struct cifsSesInfo
*ses
)
70 struct list_head
*tmp
;
71 struct cifsSesInfo
*tmp_ses
;
72 __u16 max_vcs
= ses
->server
->max_vcs
;
74 int free_vc_found
= 0;
76 /* Quoting the MS-SMB specification: "Windows-based SMB servers set this
77 field to one but do not enforce this limit, which allows an SMB client
78 to establish more virtual circuits than allowed by this value ... but
79 other server implementations can enforce this limit." */
83 write_lock(&cifs_tcp_ses_lock
);
84 if ((ses
->need_reconnect
) && is_first_ses_reconnect(ses
))
85 goto get_vc_num_exit
; /* vcnum will be zero */
86 for (i
= ses
->server
->srv_count
- 1; i
< max_vcs
; i
++) {
87 if (i
== 0) /* this is the only connection, use vc 0 */
92 list_for_each(tmp
, &ses
->server
->smb_ses_list
) {
93 tmp_ses
= list_entry(tmp
, struct cifsSesInfo
,
95 if (tmp_ses
->vcnum
== i
) {
97 break; /* found duplicate, try next vcnum */
101 break; /* we found a vcnumber that will work - use it */
105 vcnum
= 0; /* for most common case, ie if one smb session, use
106 vc zero. Also for case when no free vcnum, zero
107 is safest to send (some clients only send zero) */
108 else if (free_vc_found
== 0)
109 vcnum
= 1; /* we can not reuse vc=0 safely, since some servers
110 reset all uids on that, but 1 is ok. */
115 write_unlock(&cifs_tcp_ses_lock
);
117 return cpu_to_le16(vcnum
);
120 static __u32
cifs_ssetup_hdr(struct cifsSesInfo
*ses
, SESSION_SETUP_ANDX
*pSMB
)
122 __u32 capabilities
= 0;
124 /* init fields common to all four types of SessSetup */
125 /* Note that offsets for first seven fields in req struct are same */
126 /* in CIFS Specs so does not matter which of 3 forms of struct */
127 /* that we use in next few lines */
128 /* Note that header is initialized to zero in header_assemble */
129 pSMB
->req
.AndXCommand
= 0xFF;
130 pSMB
->req
.MaxBufferSize
= cpu_to_le16(ses
->server
->maxBuf
);
131 pSMB
->req
.MaxMpxCount
= cpu_to_le16(ses
->server
->maxReq
);
132 pSMB
->req
.VcNumber
= get_next_vcnum(ses
);
134 /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
136 /* BB verify whether signing required on neg or just on auth frame
139 capabilities
= CAP_LARGE_FILES
| CAP_NT_SMBS
| CAP_LEVEL_II_OPLOCKS
|
140 CAP_LARGE_WRITE_X
| CAP_LARGE_READ_X
;
142 if (ses
->server
->secMode
&
143 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
144 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_SECURITY_SIGNATURE
;
146 if (ses
->capabilities
& CAP_UNICODE
) {
147 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_UNICODE
;
148 capabilities
|= CAP_UNICODE
;
150 if (ses
->capabilities
& CAP_STATUS32
) {
151 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_ERR_STATUS
;
152 capabilities
|= CAP_STATUS32
;
154 if (ses
->capabilities
& CAP_DFS
) {
155 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_DFS
;
156 capabilities
|= CAP_DFS
;
158 if (ses
->capabilities
& CAP_UNIX
)
159 capabilities
|= CAP_UNIX
;
165 unicode_oslm_strings(char **pbcc_area
, const struct nls_table
*nls_cp
)
167 char *bcc_ptr
= *pbcc_area
;
170 /* Copy OS version */
171 bytes_ret
= cifs_strtoUCS((__le16
*)bcc_ptr
, "Linux version ", 32,
173 bcc_ptr
+= 2 * bytes_ret
;
174 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, init_utsname()->release
,
176 bcc_ptr
+= 2 * bytes_ret
;
177 bcc_ptr
+= 2; /* trailing null */
179 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, CIFS_NETWORK_OPSYS
,
181 bcc_ptr
+= 2 * bytes_ret
;
182 bcc_ptr
+= 2; /* trailing null */
184 *pbcc_area
= bcc_ptr
;
187 static void unicode_domain_string(char **pbcc_area
, struct cifsSesInfo
*ses
,
188 const struct nls_table
*nls_cp
)
190 char *bcc_ptr
= *pbcc_area
;
194 if (ses
->domainName
== NULL
) {
195 /* Sending null domain better than using a bogus domain name (as
196 we did briefly in 2.6.18) since server will use its default */
201 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, ses
->domainName
,
203 bcc_ptr
+= 2 * bytes_ret
;
204 bcc_ptr
+= 2; /* account for null terminator */
206 *pbcc_area
= bcc_ptr
;
210 static void unicode_ssetup_strings(char **pbcc_area
, struct cifsSesInfo
*ses
,
211 const struct nls_table
*nls_cp
)
213 char *bcc_ptr
= *pbcc_area
;
216 /* BB FIXME add check that strings total less
217 than 335 or will need to send them as arrays */
219 /* unicode strings, must be word aligned before the call */
220 /* if ((long) bcc_ptr % 2) {
225 if (ses
->userName
== NULL
) {
226 /* null user mount */
230 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, ses
->userName
,
231 MAX_USERNAME_SIZE
, nls_cp
);
233 bcc_ptr
+= 2 * bytes_ret
;
234 bcc_ptr
+= 2; /* account for null termination */
236 unicode_domain_string(&bcc_ptr
, ses
, nls_cp
);
237 unicode_oslm_strings(&bcc_ptr
, nls_cp
);
239 *pbcc_area
= bcc_ptr
;
242 static void ascii_ssetup_strings(char **pbcc_area
, struct cifsSesInfo
*ses
,
243 const struct nls_table
*nls_cp
)
245 char *bcc_ptr
= *pbcc_area
;
248 /* BB what about null user mounts - check that we do this BB */
250 if (ses
->userName
== NULL
) {
251 /* BB what about null user mounts - check that we do this BB */
253 strncpy(bcc_ptr
, ses
->userName
, MAX_USERNAME_SIZE
);
255 bcc_ptr
+= strnlen(ses
->userName
, MAX_USERNAME_SIZE
);
257 bcc_ptr
++; /* account for null termination */
261 if (ses
->domainName
!= NULL
) {
262 strncpy(bcc_ptr
, ses
->domainName
, 256);
263 bcc_ptr
+= strnlen(ses
->domainName
, 256);
264 } /* else we will send a null domain name
265 so the server will default to its own domain */
269 /* BB check for overflow here */
271 strcpy(bcc_ptr
, "Linux version ");
272 bcc_ptr
+= strlen("Linux version ");
273 strcpy(bcc_ptr
, init_utsname()->release
);
274 bcc_ptr
+= strlen(init_utsname()->release
) + 1;
276 strcpy(bcc_ptr
, CIFS_NETWORK_OPSYS
);
277 bcc_ptr
+= strlen(CIFS_NETWORK_OPSYS
) + 1;
279 *pbcc_area
= bcc_ptr
;
283 decode_unicode_ssetup(char **pbcc_area
, int bleft
, struct cifsSesInfo
*ses
,
284 const struct nls_table
*nls_cp
)
287 char *data
= *pbcc_area
;
289 cFYI(1, "bleft %d", bleft
);
292 * Windows servers do not always double null terminate their final
293 * Unicode string. Check to see if there are an uneven number of bytes
294 * left. If so, then add an extra NULL pad byte to the end of the
297 * See section 2.7.2 in "Implementing CIFS" for details
304 kfree(ses
->serverOS
);
305 ses
->serverOS
= cifs_strndup_from_ucs(data
, bleft
, true, nls_cp
);
306 cFYI(1, "serverOS=%s", ses
->serverOS
);
307 len
= (UniStrnlen((wchar_t *) data
, bleft
/ 2) * 2) + 2;
313 kfree(ses
->serverNOS
);
314 ses
->serverNOS
= cifs_strndup_from_ucs(data
, bleft
, true, nls_cp
);
315 cFYI(1, "serverNOS=%s", ses
->serverNOS
);
316 len
= (UniStrnlen((wchar_t *) data
, bleft
/ 2) * 2) + 2;
322 kfree(ses
->serverDomain
);
323 ses
->serverDomain
= cifs_strndup_from_ucs(data
, bleft
, true, nls_cp
);
324 cFYI(1, "serverDomain=%s", ses
->serverDomain
);
329 static int decode_ascii_ssetup(char **pbcc_area
, int bleft
,
330 struct cifsSesInfo
*ses
,
331 const struct nls_table
*nls_cp
)
335 char *bcc_ptr
= *pbcc_area
;
337 cFYI(1, "decode sessetup ascii. bleft %d", bleft
);
339 len
= strnlen(bcc_ptr
, bleft
);
343 kfree(ses
->serverOS
);
345 ses
->serverOS
= kzalloc(len
+ 1, GFP_KERNEL
);
347 strncpy(ses
->serverOS
, bcc_ptr
, len
);
348 if (strncmp(ses
->serverOS
, "OS/2", 4) == 0) {
349 cFYI(1, "OS/2 server");
350 ses
->flags
|= CIFS_SES_OS2
;
356 len
= strnlen(bcc_ptr
, bleft
);
360 kfree(ses
->serverNOS
);
362 ses
->serverNOS
= kzalloc(len
+ 1, GFP_KERNEL
);
364 strncpy(ses
->serverNOS
, bcc_ptr
, len
);
369 len
= strnlen(bcc_ptr
, bleft
);
373 /* No domain field in LANMAN case. Domain is
374 returned by old servers in the SMB negprot response */
375 /* BB For newer servers which do not support Unicode,
376 but thus do return domain here we could add parsing
377 for it later, but it is not very important */
378 cFYI(1, "ascii: bytes left %d", bleft
);
383 static int decode_ntlmssp_challenge(char *bcc_ptr
, int blob_len
,
384 struct cifsSesInfo
*ses
)
386 CHALLENGE_MESSAGE
*pblob
= (CHALLENGE_MESSAGE
*)bcc_ptr
;
388 if (blob_len
< sizeof(CHALLENGE_MESSAGE
)) {
389 cERROR(1, "challenge blob len %d too small", blob_len
);
393 if (memcmp(pblob
->Signature
, "NTLMSSP", 8)) {
394 cERROR(1, "blob signature incorrect %s", pblob
->Signature
);
397 if (pblob
->MessageType
!= NtLmChallenge
) {
398 cERROR(1, "Incorrect message type %d", pblob
->MessageType
);
402 memcpy(ses
->server
->cryptKey
, pblob
->Challenge
, CIFS_CRYPTO_KEY_SIZE
);
403 /* BB we could decode pblob->NegotiateFlags; some may be useful */
404 /* In particular we can examine sign flags */
405 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
406 we must set the MIC field of the AUTHENTICATE_MESSAGE */
411 #ifdef CONFIG_CIFS_EXPERIMENTAL
412 /* BB Move to ntlmssp.c eventually */
414 /* We do not malloc the blob, it is passed in pbuffer, because
415 it is fixed size, and small, making this approach cleaner */
416 static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer
,
417 struct cifsSesInfo
*ses
)
419 NEGOTIATE_MESSAGE
*sec_blob
= (NEGOTIATE_MESSAGE
*)pbuffer
;
422 memcpy(sec_blob
->Signature
, NTLMSSP_SIGNATURE
, 8);
423 sec_blob
->MessageType
= NtLmNegotiate
;
425 /* BB is NTLMV2 session security format easier to use here? */
426 flags
= NTLMSSP_NEGOTIATE_56
| NTLMSSP_REQUEST_TARGET
|
427 NTLMSSP_NEGOTIATE_128
| NTLMSSP_NEGOTIATE_UNICODE
|
428 NTLMSSP_NEGOTIATE_NT_ONLY
| NTLMSSP_NEGOTIATE_NTLM
;
429 if (ses
->server
->secMode
&
430 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
431 flags
|= NTLMSSP_NEGOTIATE_SIGN
;
432 if (ses
->server
->secMode
& SECMODE_SIGN_REQUIRED
)
433 flags
|= NTLMSSP_NEGOTIATE_ALWAYS_SIGN
;
435 sec_blob
->NegotiateFlags
|= cpu_to_le32(flags
);
437 sec_blob
->WorkstationName
.BufferOffset
= 0;
438 sec_blob
->WorkstationName
.Length
= 0;
439 sec_blob
->WorkstationName
.MaximumLength
= 0;
441 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
442 sec_blob
->DomainName
.BufferOffset
= 0;
443 sec_blob
->DomainName
.Length
= 0;
444 sec_blob
->DomainName
.MaximumLength
= 0;
447 /* We do not malloc the blob, it is passed in pbuffer, because its
448 maximum possible size is fixed and small, making this approach cleaner.
449 This function returns the length of the data in the blob */
450 static int build_ntlmssp_auth_blob(unsigned char *pbuffer
,
451 struct cifsSesInfo
*ses
,
452 const struct nls_table
*nls_cp
, bool first
)
454 AUTHENTICATE_MESSAGE
*sec_blob
= (AUTHENTICATE_MESSAGE
*)pbuffer
;
457 char ntlm_session_key
[CIFS_SESS_KEY_SIZE
];
459 memcpy(sec_blob
->Signature
, NTLMSSP_SIGNATURE
, 8);
460 sec_blob
->MessageType
= NtLmAuthenticate
;
462 flags
= NTLMSSP_NEGOTIATE_56
|
463 NTLMSSP_REQUEST_TARGET
| NTLMSSP_NEGOTIATE_TARGET_INFO
|
464 NTLMSSP_NEGOTIATE_128
| NTLMSSP_NEGOTIATE_UNICODE
|
465 NTLMSSP_NEGOTIATE_NT_ONLY
| NTLMSSP_NEGOTIATE_NTLM
;
466 if (ses
->server
->secMode
&
467 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
468 flags
|= NTLMSSP_NEGOTIATE_SIGN
;
469 if (ses
->server
->secMode
& SECMODE_SIGN_REQUIRED
)
470 flags
|= NTLMSSP_NEGOTIATE_ALWAYS_SIGN
;
472 tmp
= pbuffer
+ sizeof(AUTHENTICATE_MESSAGE
);
473 sec_blob
->NegotiateFlags
|= cpu_to_le32(flags
);
475 sec_blob
->LmChallengeResponse
.BufferOffset
=
476 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE
));
477 sec_blob
->LmChallengeResponse
.Length
= 0;
478 sec_blob
->LmChallengeResponse
.MaximumLength
= 0;
480 /* calculate session key, BB what about adding similar ntlmv2 path? */
481 SMBNTencrypt(ses
->password
, ses
->server
->cryptKey
, ntlm_session_key
);
483 cifs_calculate_mac_key(&ses
->server
->mac_signing_key
,
484 ntlm_session_key
, ses
->password
);
486 memcpy(tmp
, ntlm_session_key
, CIFS_SESS_KEY_SIZE
);
487 sec_blob
->NtChallengeResponse
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
488 sec_blob
->NtChallengeResponse
.Length
= cpu_to_le16(CIFS_SESS_KEY_SIZE
);
489 sec_blob
->NtChallengeResponse
.MaximumLength
=
490 cpu_to_le16(CIFS_SESS_KEY_SIZE
);
492 tmp
+= CIFS_SESS_KEY_SIZE
;
494 if (ses
->domainName
== NULL
) {
495 sec_blob
->DomainName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
496 sec_blob
->DomainName
.Length
= 0;
497 sec_blob
->DomainName
.MaximumLength
= 0;
501 len
= cifs_strtoUCS((__le16
*)tmp
, ses
->domainName
,
502 MAX_USERNAME_SIZE
, nls_cp
);
503 len
*= 2; /* unicode is 2 bytes each */
504 len
+= 2; /* trailing null */
505 sec_blob
->DomainName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
506 sec_blob
->DomainName
.Length
= cpu_to_le16(len
);
507 sec_blob
->DomainName
.MaximumLength
= cpu_to_le16(len
);
511 if (ses
->userName
== NULL
) {
512 sec_blob
->UserName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
513 sec_blob
->UserName
.Length
= 0;
514 sec_blob
->UserName
.MaximumLength
= 0;
518 len
= cifs_strtoUCS((__le16
*)tmp
, ses
->userName
,
519 MAX_USERNAME_SIZE
, nls_cp
);
520 len
*= 2; /* unicode is 2 bytes each */
521 len
+= 2; /* trailing null */
522 sec_blob
->UserName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
523 sec_blob
->UserName
.Length
= cpu_to_le16(len
);
524 sec_blob
->UserName
.MaximumLength
= cpu_to_le16(len
);
528 sec_blob
->WorkstationName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
529 sec_blob
->WorkstationName
.Length
= 0;
530 sec_blob
->WorkstationName
.MaximumLength
= 0;
533 sec_blob
->SessionKey
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
534 sec_blob
->SessionKey
.Length
= 0;
535 sec_blob
->SessionKey
.MaximumLength
= 0;
536 return tmp
- pbuffer
;
540 static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX
*pSMB
,
541 struct cifsSesInfo
*ses
)
543 build_ntlmssp_negotiate_blob(&pSMB
->req
.SecurityBlob
[0], ses
);
544 pSMB
->req
.SecurityBlobLength
= cpu_to_le16(sizeof(NEGOTIATE_MESSAGE
));
549 static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX
*pSMB
,
550 struct cifsSesInfo
*ses
,
551 const struct nls_table
*nls
, bool first_time
)
555 bloblen
= build_ntlmssp_auth_blob(&pSMB
->req
.SecurityBlob
[0], ses
, nls
,
557 pSMB
->req
.SecurityBlobLength
= cpu_to_le16(bloblen
);
564 CIFS_SessSetup(unsigned int xid
, struct cifsSesInfo
*ses
,
565 const struct nls_table
*nls_cp
)
569 struct smb_hdr
*smb_buf
;
572 SESSION_SETUP_ANDX
*pSMB
;
577 enum securityEnum type
;
580 struct key
*spnego_key
= NULL
;
581 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
587 read_lock(&cifs_tcp_ses_lock
);
588 first_time
= is_first_ses_reconnect(ses
);
589 read_unlock(&cifs_tcp_ses_lock
);
591 type
= ses
->server
->secType
;
593 cFYI(1, "sess setup type %d", type
);
594 ssetup_ntlmssp_authenticate
:
595 if (phase
== NtLmChallenge
)
596 phase
= NtLmAuthenticate
; /* if ntlmssp, now final phase */
598 if (type
== LANMAN
) {
599 #ifndef CONFIG_CIFS_WEAK_PW_HASH
600 /* LANMAN and plaintext are less secure and off by default.
601 So we make this explicitly be turned on in kconfig (in the
602 build) and turned on at runtime (changed from the default)
603 in proc/fs/cifs or via mount parm. Unfortunately this is
604 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
607 wct
= 10; /* lanman 2 style sessionsetup */
608 } else if ((type
== NTLM
) || (type
== NTLMv2
)) {
609 /* For NTLMv2 failures eventually may need to retry NTLM */
610 wct
= 13; /* old style NTLM sessionsetup */
611 } else /* same size: negotiate or auth, NTLMSSP or extended security */
614 rc
= small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX
, wct
, ses
,
619 pSMB
= (SESSION_SETUP_ANDX
*)smb_buf
;
621 capabilities
= cifs_ssetup_hdr(ses
, pSMB
);
623 /* we will send the SMB in three pieces:
624 a fixed length beginning part, an optional
625 SPNEGO blob (which can be zero length), and a
626 last part which will include the strings
627 and rest of bcc area. This allows us to avoid
628 a large buffer 17K allocation */
629 iov
[0].iov_base
= (char *)pSMB
;
630 iov
[0].iov_len
= smb_buf
->smb_buf_length
+ 4;
632 /* setting this here allows the code at the end of the function
633 to free the request buffer if there's an error */
634 resp_buf_type
= CIFS_SMALL_BUFFER
;
636 /* 2000 big enough to fit max user, domain, NOS name etc. */
637 str_area
= kmalloc(2000, GFP_KERNEL
);
638 if (str_area
== NULL
) {
644 ses
->flags
&= ~CIFS_SES_LANMAN
;
646 iov
[1].iov_base
= NULL
;
649 if (type
== LANMAN
) {
650 #ifdef CONFIG_CIFS_WEAK_PW_HASH
651 char lnm_session_key
[CIFS_SESS_KEY_SIZE
];
653 pSMB
->req
.hdr
.Flags2
&= ~SMBFLG2_UNICODE
;
655 /* no capabilities flags in old lanman negotiation */
657 pSMB
->old_req
.PasswordLength
= cpu_to_le16(CIFS_SESS_KEY_SIZE
);
658 /* BB calculate hash with password */
659 /* and copy into bcc */
661 calc_lanman_hash(ses
->password
, ses
->server
->cryptKey
,
662 ses
->server
->secMode
& SECMODE_PW_ENCRYPT
?
663 true : false, lnm_session_key
);
665 ses
->flags
|= CIFS_SES_LANMAN
;
666 memcpy(bcc_ptr
, (char *)lnm_session_key
, CIFS_SESS_KEY_SIZE
);
667 bcc_ptr
+= CIFS_SESS_KEY_SIZE
;
669 /* can not sign if LANMAN negotiated so no need
670 to calculate signing key? but what if server
671 changed to do higher than lanman dialect and
672 we reconnected would we ever calc signing_key? */
674 cFYI(1, "Negotiating LANMAN setting up strings");
675 /* Unicode not allowed for LANMAN dialects */
676 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
678 } else if (type
== NTLM
) {
679 char ntlm_session_key
[CIFS_SESS_KEY_SIZE
];
681 pSMB
->req_no_secext
.Capabilities
= cpu_to_le32(capabilities
);
682 pSMB
->req_no_secext
.CaseInsensitivePasswordLength
=
683 cpu_to_le16(CIFS_SESS_KEY_SIZE
);
684 pSMB
->req_no_secext
.CaseSensitivePasswordLength
=
685 cpu_to_le16(CIFS_SESS_KEY_SIZE
);
687 /* calculate session key */
688 SMBNTencrypt(ses
->password
, ses
->server
->cryptKey
,
691 if (first_time
) /* should this be moved into common code
692 with similar ntlmv2 path? */
693 cifs_calculate_mac_key(&ses
->server
->mac_signing_key
,
694 ntlm_session_key
, ses
->password
);
695 /* copy session key */
697 memcpy(bcc_ptr
, (char *)ntlm_session_key
, CIFS_SESS_KEY_SIZE
);
698 bcc_ptr
+= CIFS_SESS_KEY_SIZE
;
699 memcpy(bcc_ptr
, (char *)ntlm_session_key
, CIFS_SESS_KEY_SIZE
);
700 bcc_ptr
+= CIFS_SESS_KEY_SIZE
;
701 if (ses
->capabilities
& CAP_UNICODE
) {
702 /* unicode strings must be word aligned */
703 if (iov
[0].iov_len
% 2) {
707 unicode_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
709 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
710 } else if (type
== NTLMv2
) {
712 kmalloc(sizeof(struct ntlmv2_resp
), GFP_KERNEL
);
714 /* BB FIXME change all users of v2_sess_key to
715 struct ntlmv2_resp */
717 if (v2_sess_key
== NULL
) {
722 pSMB
->req_no_secext
.Capabilities
= cpu_to_le32(capabilities
);
724 /* LM2 password would be here if we supported it */
725 pSMB
->req_no_secext
.CaseInsensitivePasswordLength
= 0;
726 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
728 pSMB
->req_no_secext
.CaseSensitivePasswordLength
=
729 cpu_to_le16(sizeof(struct ntlmv2_resp
));
731 /* calculate session key */
732 setup_ntlmv2_rsp(ses
, v2_sess_key
, nls_cp
);
733 if (first_time
) /* should this be moved into common code
734 with similar ntlmv2 path? */
735 /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key,
736 response BB FIXME, v2_sess_key); */
738 /* copy session key */
740 /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
741 bcc_ptr += LM2_SESS_KEY_SIZE; */
742 memcpy(bcc_ptr
, (char *)v2_sess_key
,
743 sizeof(struct ntlmv2_resp
));
744 bcc_ptr
+= sizeof(struct ntlmv2_resp
);
746 if (ses
->capabilities
& CAP_UNICODE
) {
747 if (iov
[0].iov_len
% 2) {
751 unicode_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
753 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
754 } else if (type
== Kerberos
) {
755 #ifdef CONFIG_CIFS_UPCALL
756 struct cifs_spnego_msg
*msg
;
757 spnego_key
= cifs_get_spnego_key(ses
);
758 if (IS_ERR(spnego_key
)) {
759 rc
= PTR_ERR(spnego_key
);
764 msg
= spnego_key
->payload
.data
;
765 /* check version field to make sure that cifs.upcall is
766 sending us a response in an expected form */
767 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
768 cERROR(1, "incorrect version of cifs.upcall (expected"
770 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
774 /* bail out if key is too long */
775 if (msg
->sesskey_len
>
776 sizeof(ses
->server
->mac_signing_key
.data
.krb5
)) {
777 cERROR(1, "Kerberos signing key too long (%u bytes)",
783 ses
->server
->mac_signing_key
.len
= msg
->sesskey_len
;
784 memcpy(ses
->server
->mac_signing_key
.data
.krb5
,
785 msg
->data
, msg
->sesskey_len
);
787 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_EXT_SEC
;
788 capabilities
|= CAP_EXTENDED_SECURITY
;
789 pSMB
->req
.Capabilities
= cpu_to_le32(capabilities
);
790 iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
791 iov
[1].iov_len
= msg
->secblob_len
;
792 pSMB
->req
.SecurityBlobLength
= cpu_to_le16(iov
[1].iov_len
);
794 if (ses
->capabilities
& CAP_UNICODE
) {
795 /* unicode strings must be word aligned */
796 if ((iov
[0].iov_len
+ iov
[1].iov_len
) % 2) {
800 unicode_oslm_strings(&bcc_ptr
, nls_cp
);
801 unicode_domain_string(&bcc_ptr
, ses
, nls_cp
);
803 /* BB: is this right? */
804 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
805 #else /* ! CONFIG_CIFS_UPCALL */
806 cERROR(1, "Kerberos negotiated but upcall support disabled!");
809 #endif /* CONFIG_CIFS_UPCALL */
811 #ifdef CONFIG_CIFS_EXPERIMENTAL
812 if (type
== RawNTLMSSP
) {
813 if ((pSMB
->req
.hdr
.Flags2
& SMBFLG2_UNICODE
) == 0) {
814 cERROR(1, "NTLMSSP requires Unicode support");
819 cFYI(1, "ntlmssp session setup phase %d", phase
);
820 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_EXT_SEC
;
821 capabilities
|= CAP_EXTENDED_SECURITY
;
822 pSMB
->req
.Capabilities
|= cpu_to_le32(capabilities
);
823 if (phase
== NtLmNegotiate
) {
824 setup_ntlmssp_neg_req(pSMB
, ses
);
825 iov
[1].iov_len
= sizeof(NEGOTIATE_MESSAGE
);
826 } else if (phase
== NtLmAuthenticate
) {
828 blob_len
= setup_ntlmssp_auth_req(pSMB
, ses
,
831 iov
[1].iov_len
= blob_len
;
832 /* Make sure that we tell the server that we
833 are using the uid that it just gave us back
834 on the response (challenge) */
835 smb_buf
->Uid
= ses
->Suid
;
837 cERROR(1, "invalid phase %d", phase
);
841 iov
[1].iov_base
= &pSMB
->req
.SecurityBlob
[0];
842 /* unicode strings must be word aligned */
843 if ((iov
[0].iov_len
+ iov
[1].iov_len
) % 2) {
847 unicode_oslm_strings(&bcc_ptr
, nls_cp
);
849 cERROR(1, "secType %d not supported!", type
);
854 cERROR(1, "secType %d not supported!", type
);
860 iov
[2].iov_base
= str_area
;
861 iov
[2].iov_len
= (long) bcc_ptr
- (long) str_area
;
863 count
= iov
[1].iov_len
+ iov
[2].iov_len
;
864 smb_buf
->smb_buf_length
+= count
;
866 BCC_LE(smb_buf
) = cpu_to_le16(count
);
868 rc
= SendReceive2(xid
, ses
, iov
, 3 /* num_iovecs */, &resp_buf_type
,
869 CIFS_STD_OP
/* not long */ | CIFS_LOG_ERROR
);
870 /* SMB request buf freed in SendReceive2 */
872 cFYI(1, "ssetup rc from sendrecv2 is %d", rc
);
874 pSMB
= (SESSION_SETUP_ANDX
*)iov
[0].iov_base
;
875 smb_buf
= (struct smb_hdr
*)iov
[0].iov_base
;
877 if ((type
== RawNTLMSSP
) && (smb_buf
->Status
.CifsError
==
878 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED
))) {
879 if (phase
!= NtLmNegotiate
) {
880 cERROR(1, "Unexpected more processing error");
883 /* NTLMSSP Negotiate sent now processing challenge (response) */
884 phase
= NtLmChallenge
; /* process ntlmssp challenge */
885 rc
= 0; /* MORE_PROC rc is not an error here, but expected */
890 if ((smb_buf
->WordCount
!= 3) && (smb_buf
->WordCount
!= 4)) {
892 cERROR(1, "bad word count %d", smb_buf
->WordCount
);
895 action
= le16_to_cpu(pSMB
->resp
.Action
);
896 if (action
& GUEST_LOGIN
)
897 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
898 ses
->Suid
= smb_buf
->Uid
; /* UID left in wire format (le) */
899 cFYI(1, "UID = %d ", ses
->Suid
);
900 /* response can have either 3 or 4 word count - Samba sends 3 */
901 /* and lanman response is 3 */
902 bytes_remaining
= BCC(smb_buf
);
903 bcc_ptr
= pByteArea(smb_buf
);
905 if (smb_buf
->WordCount
== 4) {
907 blob_len
= le16_to_cpu(pSMB
->resp
.SecurityBlobLength
);
908 if (blob_len
> bytes_remaining
) {
909 cERROR(1, "bad security blob length %d", blob_len
);
913 if (phase
== NtLmChallenge
) {
914 rc
= decode_ntlmssp_challenge(bcc_ptr
, blob_len
, ses
);
915 /* now goto beginning for ntlmssp authenticate phase */
920 bytes_remaining
-= blob_len
;
923 /* BB check if Unicode and decode strings */
924 if (smb_buf
->Flags2
& SMBFLG2_UNICODE
) {
925 /* unicode string area must be word-aligned */
926 if (((unsigned long) bcc_ptr
- (unsigned long) smb_buf
) % 2) {
930 decode_unicode_ssetup(&bcc_ptr
, bytes_remaining
, ses
, nls_cp
);
932 rc
= decode_ascii_ssetup(&bcc_ptr
, bytes_remaining
,
938 key_revoke(spnego_key
);
942 if (resp_buf_type
== CIFS_SMALL_BUFFER
) {
943 cFYI(1, "ssetup freeing small buf %p", iov
[0].iov_base
);
944 cifs_small_buf_release(iov
[0].iov_base
);
945 } else if (resp_buf_type
== CIFS_LARGE_BUFFER
)
946 cifs_buf_release(iov
[0].iov_base
);
948 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
949 if ((phase
== NtLmChallenge
) && (rc
== 0))
950 goto ssetup_ntlmssp_authenticate
;