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 spin_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 spin_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->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,
468 struct cifsSesInfo *ses,
469 const struct nls_table *nls_cp)
473 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
476 struct ntlmv2_resp ntlmv2_response = {};
478 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
479 sec_blob->MessageType = NtLmAuthenticate;
481 flags = NTLMSSP_NEGOTIATE_56 |
482 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
483 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
484 NTLMSSP_NEGOTIATE_NTLM;
485 if (ses->server->secMode &
486 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
487 flags |= NTLMSSP_NEGOTIATE_SIGN;
488 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
489 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
491 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
492 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
494 sec_blob->LmChallengeResponse.BufferOffset =
495 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
496 sec_blob->LmChallengeResponse.Length = 0;
497 sec_blob->LmChallengeResponse.MaximumLength = 0;
499 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
500 rc = setup_ntlmv2_rsp(ses, (char *)&ntlmv2_response, nls_cp);
502 cERROR(1, "Error %d during NTLMSSP authentication", rc);
503 goto setup_ntlmv2_ret;
505 size = sizeof(struct ntlmv2_resp);
506 memcpy(tmp, (char *)&ntlmv2_response, size);
508 if (ses->tilen > 0) {
509 memcpy(tmp, ses->tiblob, ses->tilen);
513 sec_blob->NtChallengeResponse.Length = cpu_to_le16(size + ses->tilen);
514 sec_blob->NtChallengeResponse.MaximumLength =
515 cpu_to_le16(size + ses->tilen);
520 if (ses->domainName == NULL) {
521 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
522 sec_blob->DomainName.Length = 0;
523 sec_blob->DomainName.MaximumLength = 0;
527 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
528 MAX_USERNAME_SIZE, nls_cp);
529 len *= 2; /* unicode is 2 bytes each */
530 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
531 sec_blob->DomainName.Length = cpu_to_le16(len);
532 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
536 if (ses->userName == NULL) {
537 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
538 sec_blob->UserName.Length = 0;
539 sec_blob->UserName.MaximumLength = 0;
543 len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
544 MAX_USERNAME_SIZE, nls_cp);
545 len *= 2; /* unicode is 2 bytes each */
546 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
547 sec_blob->UserName.Length = cpu_to_le16(len);
548 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
552 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
553 sec_blob->WorkstationName.Length = 0;
554 sec_blob->WorkstationName.MaximumLength = 0;
557 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
558 sec_blob->SessionKey.Length = 0;
559 sec_blob->SessionKey.MaximumLength = 0;
562 *buflen = tmp - pbuffer;
567 static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
568 struct cifsSesInfo *ses)
570 build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
571 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
578 CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
579 const struct nls_table *nls_cp)
583 struct smb_hdr *smb_buf;
586 SESSION_SETUP_ANDX *pSMB;
591 enum securityEnum type;
594 struct key *spnego_key = NULL;
595 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
597 char *ntlmsspblob = NULL;
602 type = ses->server->secType;
604 cFYI(1, "sess setup type %d", type);
605 ssetup_ntlmssp_authenticate:
606 if (phase == NtLmChallenge)
607 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
609 if (type == LANMAN) {
610 #ifndef CONFIG_CIFS_WEAK_PW_HASH
611 /* LANMAN and plaintext are less secure and off by default.
612 So we make this explicitly be turned on in kconfig (in the
613 build) and turned on at runtime (changed from the default)
614 in proc/fs/cifs or via mount parm. Unfortunately this is
615 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
618 wct = 10; /* lanman 2 style sessionsetup */
619 } else if ((type == NTLM) || (type == NTLMv2)) {
620 /* For NTLMv2 failures eventually may need to retry NTLM */
621 wct = 13; /* old style NTLM sessionsetup */
622 } else /* same size: negotiate or auth, NTLMSSP or extended security */
625 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
630 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
632 capabilities = cifs_ssetup_hdr(ses, pSMB);
634 /* we will send the SMB in three pieces:
635 a fixed length beginning part, an optional
636 SPNEGO blob (which can be zero length), and a
637 last part which will include the strings
638 and rest of bcc area. This allows us to avoid
639 a large buffer 17K allocation */
640 iov[0].iov_base = (char *)pSMB;
641 iov[0].iov_len = smb_buf->smb_buf_length + 4;
643 /* setting this here allows the code at the end of the function
644 to free the request buffer if there's an error */
645 resp_buf_type = CIFS_SMALL_BUFFER;
647 /* 2000 big enough to fit max user, domain, NOS name etc. */
648 str_area = kmalloc(2000, GFP_KERNEL);
649 if (str_area == NULL) {
655 ses->flags &= ~CIFS_SES_LANMAN;
657 iov[1].iov_base = NULL;
660 if (type == LANMAN) {
661 #ifdef CONFIG_CIFS_WEAK_PW_HASH
662 char lnm_session_key[CIFS_SESS_KEY_SIZE];
664 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
666 /* no capabilities flags in old lanman negotiation */
668 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
669 /* BB calculate hash with password */
670 /* and copy into bcc */
672 calc_lanman_hash(ses->password, ses->cryptKey,
673 ses->server->secMode & SECMODE_PW_ENCRYPT ?
674 true : false, lnm_session_key);
676 ses->flags |= CIFS_SES_LANMAN;
677 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
678 bcc_ptr += CIFS_SESS_KEY_SIZE;
680 /* can not sign if LANMAN negotiated so no need
681 to calculate signing key? but what if server
682 changed to do higher than lanman dialect and
683 we reconnected would we ever calc signing_key? */
685 cFYI(1, "Negotiating LANMAN setting up strings");
686 /* Unicode not allowed for LANMAN dialects */
687 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
689 } else if (type == NTLM) {
690 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
692 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
693 pSMB->req_no_secext.CaseInsensitivePasswordLength =
694 cpu_to_le16(CIFS_SESS_KEY_SIZE);
695 pSMB->req_no_secext.CaseSensitivePasswordLength =
696 cpu_to_le16(CIFS_SESS_KEY_SIZE);
698 /* calculate session key */
699 SMBNTencrypt(ses->password, ses->cryptKey, ntlm_session_key);
701 cifs_calculate_session_key(&ses->auth_key,
702 ntlm_session_key, ses->password);
703 /* copy session key */
704 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
705 bcc_ptr += CIFS_SESS_KEY_SIZE;
706 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
707 bcc_ptr += CIFS_SESS_KEY_SIZE;
708 if (ses->capabilities & CAP_UNICODE) {
709 /* unicode strings must be word aligned */
710 if (iov[0].iov_len % 2) {
714 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
716 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
717 } else if (type == NTLMv2) {
719 kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
721 /* BB FIXME change all users of v2_sess_key to
722 struct ntlmv2_resp */
724 if (v2_sess_key == NULL) {
729 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
731 /* LM2 password would be here if we supported it */
732 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
733 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
735 /* calculate session key */
736 rc = setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
738 cERROR(1, "Error %d during NTLMv2 authentication", rc);
742 memcpy(bcc_ptr, (char *)v2_sess_key,
743 sizeof(struct ntlmv2_resp));
744 bcc_ptr += sizeof(struct ntlmv2_resp);
746 /* set case sensitive password length after tilen may get
747 * assigned, tilen is 0 otherwise.
749 pSMB->req_no_secext.CaseSensitivePasswordLength =
750 cpu_to_le16(sizeof(struct ntlmv2_resp) + ses->tilen);
751 if (ses->tilen > 0) {
752 memcpy(bcc_ptr, ses->tiblob, ses->tilen);
753 bcc_ptr += ses->tilen;
754 /* we never did allocate ses->domainName to free */
760 if (ses->capabilities & CAP_UNICODE) {
761 if (iov[0].iov_len % 2) {
765 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
767 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
768 } else if (type == Kerberos) {
769 #ifdef CONFIG_CIFS_UPCALL
770 struct cifs_spnego_msg *msg;
771 spnego_key = cifs_get_spnego_key(ses);
772 if (IS_ERR(spnego_key)) {
773 rc = PTR_ERR(spnego_key);
778 msg = spnego_key->payload.data;
779 /* check version field to make sure that cifs.upcall is
780 sending us a response in an expected form */
781 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
782 cERROR(1, "incorrect version of cifs.upcall (expected"
784 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
788 /* bail out if key is too long */
789 if (msg->sesskey_len >
790 sizeof(ses->auth_key.data.krb5)) {
791 cERROR(1, "Kerberos signing key too long (%u bytes)",
796 ses->auth_key.len = msg->sesskey_len;
797 memcpy(ses->auth_key.data.krb5, msg->data, msg->sesskey_len);
798 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
799 capabilities |= CAP_EXTENDED_SECURITY;
800 pSMB->req.Capabilities = cpu_to_le32(capabilities);
801 iov[1].iov_base = msg->data + msg->sesskey_len;
802 iov[1].iov_len = msg->secblob_len;
803 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
805 if (ses->capabilities & CAP_UNICODE) {
806 /* unicode strings must be word aligned */
807 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
811 unicode_oslm_strings(&bcc_ptr, nls_cp);
812 unicode_domain_string(&bcc_ptr, ses, nls_cp);
814 /* BB: is this right? */
815 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
816 #else /* ! CONFIG_CIFS_UPCALL */
817 cERROR(1, "Kerberos negotiated but upcall support disabled!");
820 #endif /* CONFIG_CIFS_UPCALL */
822 #ifdef CONFIG_CIFS_EXPERIMENTAL
823 if (type == RawNTLMSSP) {
824 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
825 cERROR(1, "NTLMSSP requires Unicode support");
830 cFYI(1, "ntlmssp session setup phase %d", phase);
831 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
832 capabilities |= CAP_EXTENDED_SECURITY;
833 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
834 if (phase == NtLmNegotiate) {
835 setup_ntlmssp_neg_req(pSMB, ses);
836 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
837 iov[1].iov_base = &pSMB->req.SecurityBlob[0];
838 } else if (phase == NtLmAuthenticate) {
839 /* 5 is an empirical value, large enought to
840 * hold authenticate message, max 10 of
841 * av paris, doamin,user,workstation mames,
844 ntlmsspblob = kmalloc(
845 5*sizeof(struct _AUTHENTICATE_MESSAGE),
848 cERROR(1, "Can't allocate NTLMSSP");
853 rc = build_ntlmssp_auth_blob(ntlmsspblob,
854 &blob_len, ses, nls_cp);
857 iov[1].iov_len = blob_len;
858 iov[1].iov_base = ntlmsspblob;
859 pSMB->req.SecurityBlobLength =
860 cpu_to_le16(blob_len);
861 /* Make sure that we tell the server that we
862 are using the uid that it just gave us back
863 on the response (challenge) */
864 smb_buf->Uid = ses->Suid;
866 cERROR(1, "invalid phase %d", phase);
870 /* unicode strings must be word aligned */
871 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
875 unicode_oslm_strings(&bcc_ptr, nls_cp);
877 cERROR(1, "secType %d not supported!", type);
882 cERROR(1, "secType %d not supported!", type);
888 iov[2].iov_base = str_area;
889 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
891 count = iov[1].iov_len + iov[2].iov_len;
892 smb_buf->smb_buf_length += count;
894 BCC_LE(smb_buf) = cpu_to_le16(count);
896 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
897 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
898 /* SMB request buf freed in SendReceive2 */
900 cFYI(1, "ssetup rc from sendrecv2 is %d", rc);
902 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
903 smb_buf = (struct smb_hdr *)iov[0].iov_base;
905 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
906 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
907 if (phase != NtLmNegotiate) {
908 cERROR(1, "Unexpected more processing error");
911 /* NTLMSSP Negotiate sent now processing challenge (response) */
912 phase = NtLmChallenge; /* process ntlmssp challenge */
913 rc = 0; /* MORE_PROC rc is not an error here, but expected */
918 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
920 cERROR(1, "bad word count %d", smb_buf->WordCount);
923 action = le16_to_cpu(pSMB->resp.Action);
924 if (action & GUEST_LOGIN)
925 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
926 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
927 cFYI(1, "UID = %d ", ses->Suid);
928 /* response can have either 3 or 4 word count - Samba sends 3 */
929 /* and lanman response is 3 */
930 bytes_remaining = BCC(smb_buf);
931 bcc_ptr = pByteArea(smb_buf);
933 if (smb_buf->WordCount == 4) {
934 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
935 if (blob_len > bytes_remaining) {
936 cERROR(1, "bad security blob length %d", blob_len);
940 if (phase == NtLmChallenge) {
941 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
942 /* now goto beginning for ntlmssp authenticate phase */
947 bytes_remaining -= blob_len;
950 /* BB check if Unicode and decode strings */
951 if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
952 /* unicode string area must be word-aligned */
953 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
957 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
959 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
965 key_revoke(spnego_key);
971 if (resp_buf_type == CIFS_SMALL_BUFFER) {
972 cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base);
973 cifs_small_buf_release(iov[0].iov_base);
974 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
975 cifs_buf_release(iov[0].iov_base);
977 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
978 if ((phase == NtLmChallenge) && (rc == 0))
979 goto ssetup_ntlmssp_authenticate;