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 unsigned int tioffset; /* challenge message target info area */
387 unsigned int tilen; /* challenge message target info area length */
389 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
391 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
392 cERROR(1, "challenge blob len %d too small", blob_len);
396 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
397 cERROR(1, "blob signature incorrect %s", pblob->Signature);
400 if (pblob->MessageType != NtLmChallenge) {
401 cERROR(1, "Incorrect message type %d", pblob->MessageType);
405 memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
406 /* BB we could decode pblob->NegotiateFlags; some may be useful */
407 /* In particular we can examine sign flags */
408 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
409 we must set the MIC field of the AUTHENTICATE_MESSAGE */
411 tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset);
412 tilen = cpu_to_le16(pblob->TargetInfoArray.Length);
415 ses->tiblob = kmalloc(tilen, GFP_KERNEL);
417 cERROR(1, "Challenge target info allocation failure");
421 memcpy(ses->tiblob, bcc_ptr + tioffset, ses->tilen);
427 #ifdef CONFIG_CIFS_EXPERIMENTAL
428 /* BB Move to ntlmssp.c eventually */
430 /* We do not malloc the blob, it is passed in pbuffer, because
431 it is fixed size, and small, making this approach cleaner */
432 static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
433 struct cifsSesInfo *ses)
435 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
438 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
439 sec_blob->MessageType = NtLmNegotiate;
441 /* BB is NTLMV2 session security format easier to use here? */
442 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
443 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
444 NTLMSSP_NEGOTIATE_NTLM;
445 if (ses->server->secMode &
446 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
447 flags |= NTLMSSP_NEGOTIATE_SIGN;
448 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
449 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
451 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
453 sec_blob->WorkstationName.BufferOffset = 0;
454 sec_blob->WorkstationName.Length = 0;
455 sec_blob->WorkstationName.MaximumLength = 0;
457 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
458 sec_blob->DomainName.BufferOffset = 0;
459 sec_blob->DomainName.Length = 0;
460 sec_blob->DomainName.MaximumLength = 0;
463 /* We do not malloc the blob, it is passed in pbuffer, because its
464 maximum possible size is fixed and small, making this approach cleaner.
465 This function returns the length of the data in the blob */
466 static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
467 struct cifsSesInfo *ses,
468 const struct nls_table *nls_cp)
472 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
475 struct ntlmv2_resp ntlmv2_response = {};
477 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
478 sec_blob->MessageType = NtLmAuthenticate;
480 flags = NTLMSSP_NEGOTIATE_56 |
481 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
482 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
483 NTLMSSP_NEGOTIATE_NTLM;
484 if (ses->server->secMode &
485 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
486 flags |= NTLMSSP_NEGOTIATE_SIGN;
487 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
488 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
490 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
491 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
493 sec_blob->LmChallengeResponse.BufferOffset =
494 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
495 sec_blob->LmChallengeResponse.Length = 0;
496 sec_blob->LmChallengeResponse.MaximumLength = 0;
498 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
499 rc = setup_ntlmv2_rsp(ses, (char *)&ntlmv2_response, nls_cp);
501 cERROR(1, "Error %d during NTLMSSP authentication", rc);
502 goto setup_ntlmv2_ret;
504 size = sizeof(struct ntlmv2_resp);
505 memcpy(tmp, (char *)&ntlmv2_response, size);
507 if (ses->tilen > 0) {
508 memcpy(tmp, ses->tiblob, ses->tilen);
512 sec_blob->NtChallengeResponse.Length = cpu_to_le16(size + ses->tilen);
513 sec_blob->NtChallengeResponse.MaximumLength =
514 cpu_to_le16(size + ses->tilen);
519 if (ses->domainName == NULL) {
520 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
521 sec_blob->DomainName.Length = 0;
522 sec_blob->DomainName.MaximumLength = 0;
526 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
527 MAX_USERNAME_SIZE, nls_cp);
528 len *= 2; /* unicode is 2 bytes each */
529 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
530 sec_blob->DomainName.Length = cpu_to_le16(len);
531 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
535 if (ses->userName == NULL) {
536 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
537 sec_blob->UserName.Length = 0;
538 sec_blob->UserName.MaximumLength = 0;
542 len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
543 MAX_USERNAME_SIZE, nls_cp);
544 len *= 2; /* unicode is 2 bytes each */
545 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
546 sec_blob->UserName.Length = cpu_to_le16(len);
547 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
551 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
552 sec_blob->WorkstationName.Length = 0;
553 sec_blob->WorkstationName.MaximumLength = 0;
556 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
557 sec_blob->SessionKey.Length = 0;
558 sec_blob->SessionKey.MaximumLength = 0;
561 return tmp - pbuffer;
565 static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
566 struct cifsSesInfo *ses)
568 build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
569 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
576 CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
577 const struct nls_table *nls_cp)
581 struct smb_hdr *smb_buf;
584 SESSION_SETUP_ANDX *pSMB;
589 enum securityEnum type;
592 struct key *spnego_key = NULL;
593 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
596 char *ntlmsspblob = NULL;
601 read_lock(&cifs_tcp_ses_lock);
602 first_time = is_first_ses_reconnect(ses);
603 read_unlock(&cifs_tcp_ses_lock);
605 type = ses->server->secType;
607 cFYI(1, "sess setup type %d", type);
608 ssetup_ntlmssp_authenticate:
609 if (phase == NtLmChallenge)
610 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
612 if (type == LANMAN) {
613 #ifndef CONFIG_CIFS_WEAK_PW_HASH
614 /* LANMAN and plaintext are less secure and off by default.
615 So we make this explicitly be turned on in kconfig (in the
616 build) and turned on at runtime (changed from the default)
617 in proc/fs/cifs or via mount parm. Unfortunately this is
618 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
621 wct = 10; /* lanman 2 style sessionsetup */
622 } else if ((type == NTLM) || (type == NTLMv2)) {
623 /* For NTLMv2 failures eventually may need to retry NTLM */
624 wct = 13; /* old style NTLM sessionsetup */
625 } else /* same size: negotiate or auth, NTLMSSP or extended security */
628 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
633 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
635 capabilities = cifs_ssetup_hdr(ses, pSMB);
637 /* we will send the SMB in three pieces:
638 a fixed length beginning part, an optional
639 SPNEGO blob (which can be zero length), and a
640 last part which will include the strings
641 and rest of bcc area. This allows us to avoid
642 a large buffer 17K allocation */
643 iov[0].iov_base = (char *)pSMB;
644 iov[0].iov_len = smb_buf->smb_buf_length + 4;
646 /* setting this here allows the code at the end of the function
647 to free the request buffer if there's an error */
648 resp_buf_type = CIFS_SMALL_BUFFER;
650 /* 2000 big enough to fit max user, domain, NOS name etc. */
651 str_area = kmalloc(2000, GFP_KERNEL);
652 if (str_area == NULL) {
658 ses->flags &= ~CIFS_SES_LANMAN;
660 iov[1].iov_base = NULL;
663 if (type == LANMAN) {
664 #ifdef CONFIG_CIFS_WEAK_PW_HASH
665 char lnm_session_key[CIFS_SESS_KEY_SIZE];
667 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
669 /* no capabilities flags in old lanman negotiation */
671 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
672 /* BB calculate hash with password */
673 /* and copy into bcc */
675 calc_lanman_hash(ses->password, ses->server->cryptKey,
676 ses->server->secMode & SECMODE_PW_ENCRYPT ?
677 true : false, lnm_session_key);
679 ses->flags |= CIFS_SES_LANMAN;
680 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
681 bcc_ptr += CIFS_SESS_KEY_SIZE;
683 /* can not sign if LANMAN negotiated so no need
684 to calculate signing key? but what if server
685 changed to do higher than lanman dialect and
686 we reconnected would we ever calc signing_key? */
688 cFYI(1, "Negotiating LANMAN setting up strings");
689 /* Unicode not allowed for LANMAN dialects */
690 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
692 } else if (type == NTLM) {
693 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
695 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
696 pSMB->req_no_secext.CaseInsensitivePasswordLength =
697 cpu_to_le16(CIFS_SESS_KEY_SIZE);
698 pSMB->req_no_secext.CaseSensitivePasswordLength =
699 cpu_to_le16(CIFS_SESS_KEY_SIZE);
701 /* calculate session key */
702 SMBNTencrypt(ses->password, ses->server->cryptKey,
705 if (first_time) /* should this be moved into common code
706 with similar ntlmv2 path? */
707 cifs_calculate_session_key(&ses->server->session_key,
708 ntlm_session_key, ses->password);
709 /* copy session key */
711 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
712 bcc_ptr += CIFS_SESS_KEY_SIZE;
713 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
714 bcc_ptr += CIFS_SESS_KEY_SIZE;
715 if (ses->capabilities & CAP_UNICODE) {
716 /* unicode strings must be word aligned */
717 if (iov[0].iov_len % 2) {
721 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
723 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
724 } else if (type == NTLMv2) {
726 kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
728 /* BB FIXME change all users of v2_sess_key to
729 struct ntlmv2_resp */
731 if (v2_sess_key == NULL) {
736 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
738 /* LM2 password would be here if we supported it */
739 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
740 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
742 /* calculate session key */
743 rc = setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
745 cERROR(1, "Error %d during NTLMv2 authentication", rc);
749 memcpy(bcc_ptr, (char *)v2_sess_key,
750 sizeof(struct ntlmv2_resp));
751 bcc_ptr += sizeof(struct ntlmv2_resp);
753 /* set case sensitive password length after tilen may get
754 * assigned, tilen is 0 otherwise.
756 pSMB->req_no_secext.CaseSensitivePasswordLength =
757 cpu_to_le16(sizeof(struct ntlmv2_resp) + ses->tilen);
758 if (ses->tilen > 0) {
759 memcpy(bcc_ptr, ses->tiblob, ses->tilen);
760 bcc_ptr += ses->tilen;
761 /* we never did allocate ses->domainName to free */
767 if (ses->capabilities & CAP_UNICODE) {
768 if (iov[0].iov_len % 2) {
772 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
774 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
775 } else if (type == Kerberos) {
776 #ifdef CONFIG_CIFS_UPCALL
777 struct cifs_spnego_msg *msg;
778 spnego_key = cifs_get_spnego_key(ses);
779 if (IS_ERR(spnego_key)) {
780 rc = PTR_ERR(spnego_key);
785 msg = spnego_key->payload.data;
786 /* check version field to make sure that cifs.upcall is
787 sending us a response in an expected form */
788 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
789 cERROR(1, "incorrect version of cifs.upcall (expected"
791 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
795 /* bail out if key is too long */
796 if (msg->sesskey_len >
797 sizeof(ses->server->session_key.data.krb5)) {
798 cERROR(1, "Kerberos signing key too long (%u bytes)",
804 ses->server->session_key.len = msg->sesskey_len;
805 memcpy(ses->server->session_key.data.krb5,
806 msg->data, msg->sesskey_len);
808 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
809 capabilities |= CAP_EXTENDED_SECURITY;
810 pSMB->req.Capabilities = cpu_to_le32(capabilities);
811 iov[1].iov_base = msg->data + msg->sesskey_len;
812 iov[1].iov_len = msg->secblob_len;
813 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
815 if (ses->capabilities & CAP_UNICODE) {
816 /* unicode strings must be word aligned */
817 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
821 unicode_oslm_strings(&bcc_ptr, nls_cp);
822 unicode_domain_string(&bcc_ptr, ses, nls_cp);
824 /* BB: is this right? */
825 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
826 #else /* ! CONFIG_CIFS_UPCALL */
827 cERROR(1, "Kerberos negotiated but upcall support disabled!");
830 #endif /* CONFIG_CIFS_UPCALL */
832 #ifdef CONFIG_CIFS_EXPERIMENTAL
833 if (type == RawNTLMSSP) {
834 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
835 cERROR(1, "NTLMSSP requires Unicode support");
840 cFYI(1, "ntlmssp session setup phase %d", phase);
841 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
842 capabilities |= CAP_EXTENDED_SECURITY;
843 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
844 if (phase == NtLmNegotiate) {
845 setup_ntlmssp_neg_req(pSMB, ses);
846 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
847 iov[1].iov_base = &pSMB->req.SecurityBlob[0];
848 } else if (phase == NtLmAuthenticate) {
849 /* 5 is an empirical value, large enought to
850 * hold authenticate message, max 10 of
851 * av paris, doamin,user,workstation mames,
854 ntlmsspblob = kmalloc(
855 5*sizeof(struct _AUTHENTICATE_MESSAGE),
858 cERROR(1, "Can't allocate NTLMSSP");
863 blob_len = build_ntlmssp_auth_blob(ntlmsspblob,
865 iov[1].iov_len = blob_len;
866 iov[1].iov_base = ntlmsspblob;
867 pSMB->req.SecurityBlobLength =
868 cpu_to_le16(blob_len);
869 /* Make sure that we tell the server that we
870 are using the uid that it just gave us back
871 on the response (challenge) */
872 smb_buf->Uid = ses->Suid;
874 cERROR(1, "invalid phase %d", phase);
878 /* unicode strings must be word aligned */
879 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
883 unicode_oslm_strings(&bcc_ptr, nls_cp);
885 cERROR(1, "secType %d not supported!", type);
890 cERROR(1, "secType %d not supported!", type);
896 iov[2].iov_base = str_area;
897 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
899 count = iov[1].iov_len + iov[2].iov_len;
900 smb_buf->smb_buf_length += count;
902 BCC_LE(smb_buf) = cpu_to_le16(count);
904 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
905 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
906 /* SMB request buf freed in SendReceive2 */
908 cFYI(1, "ssetup rc from sendrecv2 is %d", rc);
910 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
911 smb_buf = (struct smb_hdr *)iov[0].iov_base;
913 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
914 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
915 if (phase != NtLmNegotiate) {
916 cERROR(1, "Unexpected more processing error");
919 /* NTLMSSP Negotiate sent now processing challenge (response) */
920 phase = NtLmChallenge; /* process ntlmssp challenge */
921 rc = 0; /* MORE_PROC rc is not an error here, but expected */
926 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
928 cERROR(1, "bad word count %d", smb_buf->WordCount);
931 action = le16_to_cpu(pSMB->resp.Action);
932 if (action & GUEST_LOGIN)
933 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
934 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
935 cFYI(1, "UID = %d ", ses->Suid);
936 /* response can have either 3 or 4 word count - Samba sends 3 */
937 /* and lanman response is 3 */
938 bytes_remaining = BCC(smb_buf);
939 bcc_ptr = pByteArea(smb_buf);
941 if (smb_buf->WordCount == 4) {
943 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
944 if (blob_len > bytes_remaining) {
945 cERROR(1, "bad security blob length %d", blob_len);
949 if (phase == NtLmChallenge) {
950 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
951 /* now goto beginning for ntlmssp authenticate phase */
956 bytes_remaining -= blob_len;
959 /* BB check if Unicode and decode strings */
960 if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
961 /* unicode string area must be word-aligned */
962 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
966 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
968 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
974 key_revoke(spnego_key);
980 if (resp_buf_type == CIFS_SMALL_BUFFER) {
981 cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base);
982 cifs_small_buf_release(iov[0].iov_base);
983 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
984 cifs_buf_release(iov[0].iov_base);
986 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
987 if ((phase == NtLmChallenge) && (rc == 0))
988 goto ssetup_ntlmssp_authenticate;