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"
36 * Checks if this is the first smb session to be reconnected after
37 * the socket has been reestablished (so we know whether to use vc 0).
38 * Called while holding the cifs_tcp_ses_lock, so do not block
40 static bool is_first_ses_reconnect(struct cifsSesInfo
*ses
)
42 struct list_head
*tmp
;
43 struct cifsSesInfo
*tmp_ses
;
45 list_for_each(tmp
, &ses
->server
->smb_ses_list
) {
46 tmp_ses
= list_entry(tmp
, struct cifsSesInfo
,
48 if (tmp_ses
->need_reconnect
== false)
51 /* could not find a session that was already connected,
52 this must be the first one we are reconnecting */
57 * vc number 0 is treated specially by some servers, and should be the
58 * first one we request. After that we can use vcnumbers up to maxvcs,
59 * one for each smb session (some Windows versions set maxvcs incorrectly
60 * so maxvc=1 can be ignored). If we have too many vcs, we can reuse
61 * any vc but zero (some servers reset the connection on vcnum zero)
64 static __le16
get_next_vcnum(struct cifsSesInfo
*ses
)
67 struct list_head
*tmp
;
68 struct cifsSesInfo
*tmp_ses
;
69 __u16 max_vcs
= ses
->server
->max_vcs
;
71 int free_vc_found
= 0;
73 /* Quoting the MS-SMB specification: "Windows-based SMB servers set this
74 field to one but do not enforce this limit, which allows an SMB client
75 to establish more virtual circuits than allowed by this value ... but
76 other server implementations can enforce this limit." */
80 spin_lock(&cifs_tcp_ses_lock
);
81 if ((ses
->need_reconnect
) && is_first_ses_reconnect(ses
))
82 goto get_vc_num_exit
; /* vcnum will be zero */
83 for (i
= ses
->server
->srv_count
- 1; i
< max_vcs
; i
++) {
84 if (i
== 0) /* this is the only connection, use vc 0 */
89 list_for_each(tmp
, &ses
->server
->smb_ses_list
) {
90 tmp_ses
= list_entry(tmp
, struct cifsSesInfo
,
92 if (tmp_ses
->vcnum
== i
) {
94 break; /* found duplicate, try next vcnum */
98 break; /* we found a vcnumber that will work - use it */
102 vcnum
= 0; /* for most common case, ie if one smb session, use
103 vc zero. Also for case when no free vcnum, zero
104 is safest to send (some clients only send zero) */
105 else if (free_vc_found
== 0)
106 vcnum
= 1; /* we can not reuse vc=0 safely, since some servers
107 reset all uids on that, but 1 is ok. */
112 spin_unlock(&cifs_tcp_ses_lock
);
114 return cpu_to_le16(vcnum
);
117 static __u32
cifs_ssetup_hdr(struct cifsSesInfo
*ses
, SESSION_SETUP_ANDX
*pSMB
)
119 __u32 capabilities
= 0;
121 /* init fields common to all four types of SessSetup */
122 /* Note that offsets for first seven fields in req struct are same */
123 /* in CIFS Specs so does not matter which of 3 forms of struct */
124 /* that we use in next few lines */
125 /* Note that header is initialized to zero in header_assemble */
126 pSMB
->req
.AndXCommand
= 0xFF;
127 pSMB
->req
.MaxBufferSize
= cpu_to_le16(ses
->server
->maxBuf
);
128 pSMB
->req
.MaxMpxCount
= cpu_to_le16(ses
->server
->maxReq
);
129 pSMB
->req
.VcNumber
= get_next_vcnum(ses
);
131 /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
133 /* BB verify whether signing required on neg or just on auth frame
136 capabilities
= CAP_LARGE_FILES
| CAP_NT_SMBS
| CAP_LEVEL_II_OPLOCKS
|
137 CAP_LARGE_WRITE_X
| CAP_LARGE_READ_X
;
139 if (ses
->server
->secMode
&
140 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
141 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_SECURITY_SIGNATURE
;
143 if (ses
->capabilities
& CAP_UNICODE
) {
144 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_UNICODE
;
145 capabilities
|= CAP_UNICODE
;
147 if (ses
->capabilities
& CAP_STATUS32
) {
148 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_ERR_STATUS
;
149 capabilities
|= CAP_STATUS32
;
151 if (ses
->capabilities
& CAP_DFS
) {
152 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_DFS
;
153 capabilities
|= CAP_DFS
;
155 if (ses
->capabilities
& CAP_UNIX
)
156 capabilities
|= CAP_UNIX
;
162 unicode_oslm_strings(char **pbcc_area
, const struct nls_table
*nls_cp
)
164 char *bcc_ptr
= *pbcc_area
;
167 /* Copy OS version */
168 bytes_ret
= cifs_strtoUCS((__le16
*)bcc_ptr
, "Linux version ", 32,
170 bcc_ptr
+= 2 * bytes_ret
;
171 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, init_utsname()->release
,
173 bcc_ptr
+= 2 * bytes_ret
;
174 bcc_ptr
+= 2; /* trailing null */
176 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, CIFS_NETWORK_OPSYS
,
178 bcc_ptr
+= 2 * bytes_ret
;
179 bcc_ptr
+= 2; /* trailing null */
181 *pbcc_area
= bcc_ptr
;
184 static void unicode_domain_string(char **pbcc_area
, struct cifsSesInfo
*ses
,
185 const struct nls_table
*nls_cp
)
187 char *bcc_ptr
= *pbcc_area
;
191 if (ses
->domainName
== NULL
) {
192 /* Sending null domain better than using a bogus domain name (as
193 we did briefly in 2.6.18) since server will use its default */
198 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, ses
->domainName
,
200 bcc_ptr
+= 2 * bytes_ret
;
201 bcc_ptr
+= 2; /* account for null terminator */
203 *pbcc_area
= bcc_ptr
;
207 static void unicode_ssetup_strings(char **pbcc_area
, struct cifsSesInfo
*ses
,
208 const struct nls_table
*nls_cp
)
210 char *bcc_ptr
= *pbcc_area
;
213 /* BB FIXME add check that strings total less
214 than 335 or will need to send them as arrays */
216 /* unicode strings, must be word aligned before the call */
217 /* if ((long) bcc_ptr % 2) {
222 if (ses
->userName
== NULL
) {
223 /* null user mount */
227 bytes_ret
= cifs_strtoUCS((__le16
*) bcc_ptr
, ses
->userName
,
228 MAX_USERNAME_SIZE
, nls_cp
);
230 bcc_ptr
+= 2 * bytes_ret
;
231 bcc_ptr
+= 2; /* account for null termination */
233 unicode_domain_string(&bcc_ptr
, ses
, nls_cp
);
234 unicode_oslm_strings(&bcc_ptr
, nls_cp
);
236 *pbcc_area
= bcc_ptr
;
239 static void ascii_ssetup_strings(char **pbcc_area
, struct cifsSesInfo
*ses
,
240 const struct nls_table
*nls_cp
)
242 char *bcc_ptr
= *pbcc_area
;
245 /* BB what about null user mounts - check that we do this BB */
247 if (ses
->userName
== NULL
) {
248 /* BB what about null user mounts - check that we do this BB */
250 strncpy(bcc_ptr
, ses
->userName
, MAX_USERNAME_SIZE
);
252 bcc_ptr
+= strnlen(ses
->userName
, MAX_USERNAME_SIZE
);
254 bcc_ptr
++; /* account for null termination */
258 if (ses
->domainName
!= NULL
) {
259 strncpy(bcc_ptr
, ses
->domainName
, 256);
260 bcc_ptr
+= strnlen(ses
->domainName
, 256);
261 } /* else we will send a null domain name
262 so the server will default to its own domain */
266 /* BB check for overflow here */
268 strcpy(bcc_ptr
, "Linux version ");
269 bcc_ptr
+= strlen("Linux version ");
270 strcpy(bcc_ptr
, init_utsname()->release
);
271 bcc_ptr
+= strlen(init_utsname()->release
) + 1;
273 strcpy(bcc_ptr
, CIFS_NETWORK_OPSYS
);
274 bcc_ptr
+= strlen(CIFS_NETWORK_OPSYS
) + 1;
276 *pbcc_area
= bcc_ptr
;
280 decode_unicode_ssetup(char **pbcc_area
, int bleft
, struct cifsSesInfo
*ses
,
281 const struct nls_table
*nls_cp
)
284 char *data
= *pbcc_area
;
286 cFYI(1, "bleft %d", bleft
);
289 * Windows servers do not always double null terminate their final
290 * Unicode string. Check to see if there are an uneven number of bytes
291 * left. If so, then add an extra NULL pad byte to the end of the
294 * See section 2.7.2 in "Implementing CIFS" for details
301 kfree(ses
->serverOS
);
302 ses
->serverOS
= cifs_strndup_from_ucs(data
, bleft
, true, nls_cp
);
303 cFYI(1, "serverOS=%s", ses
->serverOS
);
304 len
= (UniStrnlen((wchar_t *) data
, bleft
/ 2) * 2) + 2;
310 kfree(ses
->serverNOS
);
311 ses
->serverNOS
= cifs_strndup_from_ucs(data
, bleft
, true, nls_cp
);
312 cFYI(1, "serverNOS=%s", ses
->serverNOS
);
313 len
= (UniStrnlen((wchar_t *) data
, bleft
/ 2) * 2) + 2;
319 kfree(ses
->serverDomain
);
320 ses
->serverDomain
= cifs_strndup_from_ucs(data
, bleft
, true, nls_cp
);
321 cFYI(1, "serverDomain=%s", ses
->serverDomain
);
326 static int decode_ascii_ssetup(char **pbcc_area
, int bleft
,
327 struct cifsSesInfo
*ses
,
328 const struct nls_table
*nls_cp
)
332 char *bcc_ptr
= *pbcc_area
;
334 cFYI(1, "decode sessetup ascii. bleft %d", bleft
);
336 len
= strnlen(bcc_ptr
, bleft
);
340 kfree(ses
->serverOS
);
342 ses
->serverOS
= kzalloc(len
+ 1, GFP_KERNEL
);
344 strncpy(ses
->serverOS
, bcc_ptr
, len
);
345 if (strncmp(ses
->serverOS
, "OS/2", 4) == 0) {
346 cFYI(1, "OS/2 server");
347 ses
->flags
|= CIFS_SES_OS2
;
353 len
= strnlen(bcc_ptr
, bleft
);
357 kfree(ses
->serverNOS
);
359 ses
->serverNOS
= kzalloc(len
+ 1, GFP_KERNEL
);
361 strncpy(ses
->serverNOS
, bcc_ptr
, len
);
366 len
= strnlen(bcc_ptr
, bleft
);
370 /* No domain field in LANMAN case. Domain is
371 returned by old servers in the SMB negprot response */
372 /* BB For newer servers which do not support Unicode,
373 but thus do return domain here we could add parsing
374 for it later, but it is not very important */
375 cFYI(1, "ascii: bytes left %d", bleft
);
380 static int decode_ntlmssp_challenge(char *bcc_ptr
, int blob_len
,
381 struct cifsSesInfo
*ses
)
383 unsigned int tioffset
; /* challenge message target info area */
384 unsigned int tilen
; /* challenge message target info area length */
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
->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 */
408 tioffset
= cpu_to_le16(pblob
->TargetInfoArray
.BufferOffset
);
409 tilen
= cpu_to_le16(pblob
->TargetInfoArray
.Length
);
412 ses
->tiblob
= kmalloc(tilen
, GFP_KERNEL
);
414 cERROR(1, "Challenge target info allocation failure");
418 memcpy(ses
->tiblob
, bcc_ptr
+ tioffset
, ses
->tilen
);
424 #ifdef CONFIG_CIFS_EXPERIMENTAL
425 /* BB Move to ntlmssp.c eventually */
427 /* We do not malloc the blob, it is passed in pbuffer, because
428 it is fixed size, and small, making this approach cleaner */
429 static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer
,
430 struct cifsSesInfo
*ses
)
432 NEGOTIATE_MESSAGE
*sec_blob
= (NEGOTIATE_MESSAGE
*)pbuffer
;
435 memcpy(sec_blob
->Signature
, NTLMSSP_SIGNATURE
, 8);
436 sec_blob
->MessageType
= NtLmNegotiate
;
438 /* BB is NTLMV2 session security format easier to use here? */
439 flags
= NTLMSSP_NEGOTIATE_56
| NTLMSSP_REQUEST_TARGET
|
440 NTLMSSP_NEGOTIATE_128
| NTLMSSP_NEGOTIATE_UNICODE
|
441 NTLMSSP_NEGOTIATE_NTLM
;
442 if (ses
->server
->secMode
&
443 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
444 flags
|= NTLMSSP_NEGOTIATE_SIGN
;
445 if (ses
->server
->secMode
& SECMODE_SIGN_REQUIRED
)
446 flags
|= NTLMSSP_NEGOTIATE_ALWAYS_SIGN
;
448 sec_blob
->NegotiateFlags
|= cpu_to_le32(flags
);
450 sec_blob
->WorkstationName
.BufferOffset
= 0;
451 sec_blob
->WorkstationName
.Length
= 0;
452 sec_blob
->WorkstationName
.MaximumLength
= 0;
454 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
455 sec_blob
->DomainName
.BufferOffset
= 0;
456 sec_blob
->DomainName
.Length
= 0;
457 sec_blob
->DomainName
.MaximumLength
= 0;
460 /* We do not malloc the blob, it is passed in pbuffer, because its
461 maximum possible size is fixed and small, making this approach cleaner.
462 This function returns the length of the data in the blob */
463 static int build_ntlmssp_auth_blob(unsigned char *pbuffer
,
465 struct cifsSesInfo
*ses
,
466 const struct nls_table
*nls_cp
)
469 AUTHENTICATE_MESSAGE
*sec_blob
= (AUTHENTICATE_MESSAGE
*)pbuffer
;
473 memcpy(sec_blob
->Signature
, NTLMSSP_SIGNATURE
, 8);
474 sec_blob
->MessageType
= NtLmAuthenticate
;
476 flags
= NTLMSSP_NEGOTIATE_56
|
477 NTLMSSP_REQUEST_TARGET
| NTLMSSP_NEGOTIATE_TARGET_INFO
|
478 NTLMSSP_NEGOTIATE_128
| NTLMSSP_NEGOTIATE_UNICODE
|
479 NTLMSSP_NEGOTIATE_NTLM
;
480 if (ses
->server
->secMode
&
481 (SECMODE_SIGN_REQUIRED
| SECMODE_SIGN_ENABLED
))
482 flags
|= NTLMSSP_NEGOTIATE_SIGN
;
483 if (ses
->server
->secMode
& SECMODE_SIGN_REQUIRED
)
484 flags
|= NTLMSSP_NEGOTIATE_ALWAYS_SIGN
;
486 tmp
= pbuffer
+ sizeof(AUTHENTICATE_MESSAGE
);
487 sec_blob
->NegotiateFlags
|= cpu_to_le32(flags
);
489 sec_blob
->LmChallengeResponse
.BufferOffset
=
490 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE
));
491 sec_blob
->LmChallengeResponse
.Length
= 0;
492 sec_blob
->LmChallengeResponse
.MaximumLength
= 0;
494 sec_blob
->NtChallengeResponse
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
495 rc
= setup_ntlmv2_rsp(ses
, nls_cp
);
497 cERROR(1, "Error %d during NTLMSSP authentication", rc
);
498 goto setup_ntlmv2_ret
;
500 memcpy(tmp
, ses
->auth_key
.response
+ CIFS_SESS_KEY_SIZE
,
501 ses
->auth_key
.len
- CIFS_SESS_KEY_SIZE
);
502 tmp
+= ses
->auth_key
.len
- CIFS_SESS_KEY_SIZE
;
504 sec_blob
->NtChallengeResponse
.Length
=
505 cpu_to_le16(ses
->auth_key
.len
- CIFS_SESS_KEY_SIZE
);
506 sec_blob
->NtChallengeResponse
.MaximumLength
=
507 cpu_to_le16(ses
->auth_key
.len
- CIFS_SESS_KEY_SIZE
);
509 if (ses
->domainName
== NULL
) {
510 sec_blob
->DomainName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
511 sec_blob
->DomainName
.Length
= 0;
512 sec_blob
->DomainName
.MaximumLength
= 0;
516 len
= cifs_strtoUCS((__le16
*)tmp
, ses
->domainName
,
517 MAX_USERNAME_SIZE
, nls_cp
);
518 len
*= 2; /* unicode is 2 bytes each */
519 sec_blob
->DomainName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
520 sec_blob
->DomainName
.Length
= cpu_to_le16(len
);
521 sec_blob
->DomainName
.MaximumLength
= cpu_to_le16(len
);
525 if (ses
->userName
== NULL
) {
526 sec_blob
->UserName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
527 sec_blob
->UserName
.Length
= 0;
528 sec_blob
->UserName
.MaximumLength
= 0;
532 len
= cifs_strtoUCS((__le16
*)tmp
, ses
->userName
,
533 MAX_USERNAME_SIZE
, nls_cp
);
534 len
*= 2; /* unicode is 2 bytes each */
535 sec_blob
->UserName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
536 sec_blob
->UserName
.Length
= cpu_to_le16(len
);
537 sec_blob
->UserName
.MaximumLength
= cpu_to_le16(len
);
541 sec_blob
->WorkstationName
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
542 sec_blob
->WorkstationName
.Length
= 0;
543 sec_blob
->WorkstationName
.MaximumLength
= 0;
546 sec_blob
->SessionKey
.BufferOffset
= cpu_to_le32(tmp
- pbuffer
);
547 sec_blob
->SessionKey
.Length
= 0;
548 sec_blob
->SessionKey
.MaximumLength
= 0;
551 *buflen
= tmp
- pbuffer
;
556 static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX
*pSMB
,
557 struct cifsSesInfo
*ses
)
559 build_ntlmssp_negotiate_blob(&pSMB
->req
.SecurityBlob
[0], ses
);
560 pSMB
->req
.SecurityBlobLength
= cpu_to_le16(sizeof(NEGOTIATE_MESSAGE
));
567 CIFS_SessSetup(unsigned int xid
, struct cifsSesInfo
*ses
,
568 const struct nls_table
*nls_cp
)
572 struct smb_hdr
*smb_buf
;
575 SESSION_SETUP_ANDX
*pSMB
;
580 enum securityEnum type
;
583 struct key
*spnego_key
= NULL
;
584 __le32 phase
= NtLmNegotiate
; /* NTLMSSP, if needed, is multistage */
586 char *ntlmsspblob
= NULL
;
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
->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 pSMB
->req_no_secext
.Capabilities
= cpu_to_le32(capabilities
);
680 pSMB
->req_no_secext
.CaseInsensitivePasswordLength
=
681 cpu_to_le16(CIFS_AUTH_RESP_SIZE
);
682 pSMB
->req_no_secext
.CaseSensitivePasswordLength
=
683 cpu_to_le16(CIFS_AUTH_RESP_SIZE
);
685 /* calculate ntlm response and session key */
686 rc
= setup_ntlm_response(ses
);
688 cERROR(1, "Error %d during NTLM authentication", rc
);
692 /* copy ntlm response */
693 memcpy(bcc_ptr
, ses
->auth_key
.response
+ CIFS_SESS_KEY_SIZE
,
694 CIFS_AUTH_RESP_SIZE
);
695 bcc_ptr
+= CIFS_AUTH_RESP_SIZE
;
696 memcpy(bcc_ptr
, ses
->auth_key
.response
+ CIFS_SESS_KEY_SIZE
,
697 CIFS_AUTH_RESP_SIZE
);
698 bcc_ptr
+= CIFS_AUTH_RESP_SIZE
;
700 if (ses
->capabilities
& CAP_UNICODE
) {
701 /* unicode strings must be word aligned */
702 if (iov
[0].iov_len
% 2) {
706 unicode_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
708 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
709 } else if (type
== NTLMv2
) {
710 pSMB
->req_no_secext
.Capabilities
= cpu_to_le32(capabilities
);
712 /* LM2 password would be here if we supported it */
713 pSMB
->req_no_secext
.CaseInsensitivePasswordLength
= 0;
715 /* calculate nlmv2 response and session key */
716 rc
= setup_ntlmv2_rsp(ses
, nls_cp
);
718 cERROR(1, "Error %d during NTLMv2 authentication", rc
);
721 memcpy(bcc_ptr
, ses
->auth_key
.response
+ CIFS_SESS_KEY_SIZE
,
722 ses
->auth_key
.len
- CIFS_SESS_KEY_SIZE
);
723 bcc_ptr
+= ses
->auth_key
.len
- CIFS_SESS_KEY_SIZE
;
725 /* set case sensitive password length after tilen may get
726 * assigned, tilen is 0 otherwise.
728 pSMB
->req_no_secext
.CaseSensitivePasswordLength
=
729 cpu_to_le16(ses
->auth_key
.len
);
731 if (ses
->capabilities
& CAP_UNICODE
) {
732 if (iov
[0].iov_len
% 2) {
736 unicode_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
738 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
739 } else if (type
== Kerberos
) {
740 #ifdef CONFIG_CIFS_UPCALL
741 struct cifs_spnego_msg
*msg
;
743 spnego_key
= cifs_get_spnego_key(ses
);
744 if (IS_ERR(spnego_key
)) {
745 rc
= PTR_ERR(spnego_key
);
750 msg
= spnego_key
->payload
.data
;
751 /* check version field to make sure that cifs.upcall is
752 sending us a response in an expected form */
753 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
754 cERROR(1, "incorrect version of cifs.upcall (expected"
756 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
761 ses
->auth_key
.response
= kmalloc(msg
->sesskey_len
, GFP_KERNEL
);
762 if (!ses
->auth_key
.response
) {
763 cERROR(1, "Kerberos can't allocate (%u bytes) memory",
768 memcpy(ses
->auth_key
.response
, msg
->data
, msg
->sesskey_len
);
769 ses
->auth_key
.len
= msg
->sesskey_len
;
771 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_EXT_SEC
;
772 capabilities
|= CAP_EXTENDED_SECURITY
;
773 pSMB
->req
.Capabilities
= cpu_to_le32(capabilities
);
774 iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
775 iov
[1].iov_len
= msg
->secblob_len
;
776 pSMB
->req
.SecurityBlobLength
= cpu_to_le16(iov
[1].iov_len
);
778 if (ses
->capabilities
& CAP_UNICODE
) {
779 /* unicode strings must be word aligned */
780 if ((iov
[0].iov_len
+ iov
[1].iov_len
) % 2) {
784 unicode_oslm_strings(&bcc_ptr
, nls_cp
);
785 unicode_domain_string(&bcc_ptr
, ses
, nls_cp
);
787 /* BB: is this right? */
788 ascii_ssetup_strings(&bcc_ptr
, ses
, nls_cp
);
789 #else /* ! CONFIG_CIFS_UPCALL */
790 cERROR(1, "Kerberos negotiated but upcall support disabled!");
793 #endif /* CONFIG_CIFS_UPCALL */
795 #ifdef CONFIG_CIFS_EXPERIMENTAL
796 if (type
== RawNTLMSSP
) {
797 if ((pSMB
->req
.hdr
.Flags2
& SMBFLG2_UNICODE
) == 0) {
798 cERROR(1, "NTLMSSP requires Unicode support");
803 cFYI(1, "ntlmssp session setup phase %d", phase
);
804 pSMB
->req
.hdr
.Flags2
|= SMBFLG2_EXT_SEC
;
805 capabilities
|= CAP_EXTENDED_SECURITY
;
806 pSMB
->req
.Capabilities
|= cpu_to_le32(capabilities
);
807 if (phase
== NtLmNegotiate
) {
808 setup_ntlmssp_neg_req(pSMB
, ses
);
809 iov
[1].iov_len
= sizeof(NEGOTIATE_MESSAGE
);
810 iov
[1].iov_base
= &pSMB
->req
.SecurityBlob
[0];
811 } else if (phase
== NtLmAuthenticate
) {
812 /* 5 is an empirical value, large enought to
813 * hold authenticate message, max 10 of
814 * av paris, doamin,user,workstation mames,
817 ntlmsspblob
= kmalloc(
818 5*sizeof(struct _AUTHENTICATE_MESSAGE
),
821 cERROR(1, "Can't allocate NTLMSSP");
826 rc
= build_ntlmssp_auth_blob(ntlmsspblob
,
827 &blob_len
, ses
, nls_cp
);
830 iov
[1].iov_len
= blob_len
;
831 iov
[1].iov_base
= ntlmsspblob
;
832 pSMB
->req
.SecurityBlobLength
=
833 cpu_to_le16(blob_len
);
834 /* Make sure that we tell the server that we
835 are using the uid that it just gave us back
836 on the response (challenge) */
837 smb_buf
->Uid
= ses
->Suid
;
839 cERROR(1, "invalid phase %d", phase
);
843 /* unicode strings must be word aligned */
844 if ((iov
[0].iov_len
+ iov
[1].iov_len
) % 2) {
848 unicode_oslm_strings(&bcc_ptr
, nls_cp
);
850 cERROR(1, "secType %d not supported!", type
);
855 cERROR(1, "secType %d not supported!", type
);
861 iov
[2].iov_base
= str_area
;
862 iov
[2].iov_len
= (long) bcc_ptr
- (long) str_area
;
864 count
= iov
[1].iov_len
+ iov
[2].iov_len
;
865 smb_buf
->smb_buf_length
+= count
;
867 BCC_LE(smb_buf
) = cpu_to_le16(count
);
869 rc
= SendReceive2(xid
, ses
, iov
, 3 /* num_iovecs */, &resp_buf_type
,
870 CIFS_STD_OP
/* not long */ | CIFS_LOG_ERROR
);
871 /* SMB request buf freed in SendReceive2 */
873 pSMB
= (SESSION_SETUP_ANDX
*)iov
[0].iov_base
;
874 smb_buf
= (struct smb_hdr
*)iov
[0].iov_base
;
876 if ((type
== RawNTLMSSP
) && (smb_buf
->Status
.CifsError
==
877 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED
))) {
878 if (phase
!= NtLmNegotiate
) {
879 cERROR(1, "Unexpected more processing error");
882 /* NTLMSSP Negotiate sent now processing challenge (response) */
883 phase
= NtLmChallenge
; /* process ntlmssp challenge */
884 rc
= 0; /* MORE_PROC rc is not an error here, but expected */
889 if ((smb_buf
->WordCount
!= 3) && (smb_buf
->WordCount
!= 4)) {
891 cERROR(1, "bad word count %d", smb_buf
->WordCount
);
894 action
= le16_to_cpu(pSMB
->resp
.Action
);
895 if (action
& GUEST_LOGIN
)
896 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
897 ses
->Suid
= smb_buf
->Uid
; /* UID left in wire format (le) */
898 cFYI(1, "UID = %d ", ses
->Suid
);
899 /* response can have either 3 or 4 word count - Samba sends 3 */
900 /* and lanman response is 3 */
901 bytes_remaining
= BCC(smb_buf
);
902 bcc_ptr
= pByteArea(smb_buf
);
904 if (smb_buf
->WordCount
== 4) {
905 blob_len
= le16_to_cpu(pSMB
->resp
.SecurityBlobLength
);
906 if (blob_len
> bytes_remaining
) {
907 cERROR(1, "bad security blob length %d", blob_len
);
911 if (phase
== NtLmChallenge
) {
912 rc
= decode_ntlmssp_challenge(bcc_ptr
, blob_len
, ses
);
913 /* now goto beginning for ntlmssp authenticate phase */
918 bytes_remaining
-= blob_len
;
921 /* BB check if Unicode and decode strings */
922 if (smb_buf
->Flags2
& SMBFLG2_UNICODE
) {
923 /* unicode string area must be word-aligned */
924 if (((unsigned long) bcc_ptr
- (unsigned long) smb_buf
) % 2) {
928 decode_unicode_ssetup(&bcc_ptr
, bytes_remaining
, ses
, nls_cp
);
930 rc
= decode_ascii_ssetup(&bcc_ptr
, bytes_remaining
,
936 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
;