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 "cifs_spnego.h"
34 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
37 /* Checks if this is the first smb session to be reconnected after
38 the socket has been reestablished (so we know whether to use vc 0).
39 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 write_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 write_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 */
226 } else { /* 300 should be long enough for any conceivable user name */
227 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName,
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 */
249 } else { /* 300 should be long enough for any conceivable user name */
250 strncpy(bcc_ptr, ses->userName, 300);
252 /* BB improve check for overflow */
253 bcc_ptr += strnlen(ses->userName, 300);
255 bcc_ptr++; /* account for null termination */
259 if (ses->domainName != NULL) {
260 strncpy(bcc_ptr, ses->domainName, 256);
261 bcc_ptr += strnlen(ses->domainName, 256);
262 } /* else we will send a null domain name
263 so the server will default to its own domain */
267 /* BB check for overflow here */
269 strcpy(bcc_ptr, "Linux version ");
270 bcc_ptr += strlen("Linux version ");
271 strcpy(bcc_ptr, init_utsname()->release);
272 bcc_ptr += strlen(init_utsname()->release) + 1;
274 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
275 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
277 *pbcc_area = bcc_ptr;
281 decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses,
282 const struct nls_table *nls_cp)
285 char *data = *pbcc_area;
287 cFYI(1, ("bleft %d", bleft));
290 * Windows servers do not always double null terminate their final
291 * Unicode string. Check to see if there are an uneven number of bytes
292 * left. If so, then add an extra NULL pad byte to the end of the
295 * See section 2.7.2 in "Implementing CIFS" for details
302 kfree(ses->serverOS);
303 ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
304 cFYI(1, ("serverOS=%s", ses->serverOS));
305 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
311 kfree(ses->serverNOS);
312 ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
313 cFYI(1, ("serverNOS=%s", ses->serverNOS));
314 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
320 kfree(ses->serverDomain);
321 ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
322 cFYI(1, ("serverDomain=%s", ses->serverDomain));
327 static int decode_ascii_ssetup(char **pbcc_area, int bleft,
328 struct cifsSesInfo *ses,
329 const struct nls_table *nls_cp)
333 char *bcc_ptr = *pbcc_area;
335 cFYI(1, ("decode sessetup ascii. bleft %d", bleft));
337 len = strnlen(bcc_ptr, bleft);
341 kfree(ses->serverOS);
343 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
345 strncpy(ses->serverOS, bcc_ptr, len);
346 if (strncmp(ses->serverOS, "OS/2", 4) == 0) {
347 cFYI(1, ("OS/2 server"));
348 ses->flags |= CIFS_SES_OS2;
354 len = strnlen(bcc_ptr, bleft);
358 kfree(ses->serverNOS);
360 ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
362 strncpy(ses->serverNOS, bcc_ptr, len);
367 len = strnlen(bcc_ptr, bleft);
371 /* No domain field in LANMAN case. Domain is
372 returned by old servers in the SMB negprot response */
373 /* BB For newer servers which do not support Unicode,
374 but thus do return domain here we could add parsing
375 for it later, but it is not very important */
376 cFYI(1, ("ascii: bytes left %d", bleft));
381 static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
382 struct cifsSesInfo *ses)
384 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
386 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
387 cERROR(1, ("challenge blob len %d too small", blob_len));
391 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
392 cERROR(1, ("blob signature incorrect %s", pblob->Signature));
395 if (pblob->MessageType != NtLmChallenge) {
396 cERROR(1, ("Incorrect message type %d", pblob->MessageType));
400 memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
401 /* BB we could decode pblob->NegotiateFlags; some may be useful */
402 /* In particular we can examine sign flags */
403 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
404 we must set the MIC field of the AUTHENTICATE_MESSAGE */
409 #ifdef CONFIG_CIFS_EXPERIMENTAL
410 /* BB Move to ntlmssp.c eventually */
412 /* We do not malloc the blob, it is passed in pbuffer, because
413 it is fixed size, and small, making this approach cleaner */
414 static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
415 struct cifsSesInfo *ses)
417 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
420 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
421 sec_blob->MessageType = NtLmNegotiate;
423 /* BB is NTLMV2 session security format easier to use here? */
424 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
425 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
426 NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
427 if (ses->server->secMode &
428 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
429 flags |= NTLMSSP_NEGOTIATE_SIGN;
430 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
431 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
433 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
435 sec_blob->WorkstationName.BufferOffset = 0;
436 sec_blob->WorkstationName.Length = 0;
437 sec_blob->WorkstationName.MaximumLength = 0;
439 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
440 sec_blob->DomainName.BufferOffset = 0;
441 sec_blob->DomainName.Length = 0;
442 sec_blob->DomainName.MaximumLength = 0;
445 /* We do not malloc the blob, it is passed in pbuffer, because its
446 maximum possible size is fixed and small, making this approach cleaner.
447 This function returns the length of the data in the blob */
448 static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
449 struct cifsSesInfo *ses,
450 const struct nls_table *nls_cp, int first)
452 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
455 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
457 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
458 sec_blob->MessageType = NtLmAuthenticate;
460 flags = NTLMSSP_NEGOTIATE_56 |
461 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
462 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
463 NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
464 if (ses->server->secMode &
465 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
466 flags |= NTLMSSP_NEGOTIATE_SIGN;
467 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
468 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
470 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
471 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
473 sec_blob->LmChallengeResponse.BufferOffset =
474 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
475 sec_blob->LmChallengeResponse.Length = 0;
476 sec_blob->LmChallengeResponse.MaximumLength = 0;
478 /* calculate session key, BB what about adding similar ntlmv2 path? */
479 SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key);
481 cifs_calculate_mac_key(&ses->server->mac_signing_key,
482 ntlm_session_key, ses->password);
484 memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE);
485 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
486 sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE);
487 sec_blob->NtChallengeResponse.MaximumLength =
488 cpu_to_le16(CIFS_SESS_KEY_SIZE);
490 tmp += CIFS_SESS_KEY_SIZE;
492 if (ses->domainName == NULL) {
493 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
494 sec_blob->DomainName.Length = 0;
495 sec_blob->DomainName.MaximumLength = 0;
499 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
500 MAX_USERNAME_SIZE, nls_cp);
501 len *= 2; /* unicode is 2 bytes each */
502 len += 2; /* trailing null */
503 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
504 sec_blob->DomainName.Length = cpu_to_le16(len);
505 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
509 if (ses->userName == NULL) {
510 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
511 sec_blob->UserName.Length = 0;
512 sec_blob->UserName.MaximumLength = 0;
516 len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
517 MAX_USERNAME_SIZE, nls_cp);
518 len *= 2; /* unicode is 2 bytes each */
519 len += 2; /* trailing null */
520 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
521 sec_blob->UserName.Length = cpu_to_le16(len);
522 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
526 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
527 sec_blob->WorkstationName.Length = 0;
528 sec_blob->WorkstationName.MaximumLength = 0;
531 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
532 sec_blob->SessionKey.Length = 0;
533 sec_blob->SessionKey.MaximumLength = 0;
534 return tmp - pbuffer;
538 static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
539 struct cifsSesInfo *ses)
541 build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
542 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
547 static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB,
548 struct cifsSesInfo *ses,
549 const struct nls_table *nls, int first_time)
553 bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls,
555 pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen);
562 CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
563 const struct nls_table *nls_cp)
567 struct smb_hdr *smb_buf;
570 SESSION_SETUP_ANDX *pSMB;
575 enum securityEnum type;
578 struct key *spnego_key = NULL;
579 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
584 type = ses->server->secType;
586 cFYI(1, ("sess setup type %d", type));
587 ssetup_ntlmssp_authenticate:
588 if (phase == NtLmChallenge)
589 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
591 if (type == LANMAN) {
592 #ifndef CONFIG_CIFS_WEAK_PW_HASH
593 /* LANMAN and plaintext are less secure and off by default.
594 So we make this explicitly be turned on in kconfig (in the
595 build) and turned on at runtime (changed from the default)
596 in proc/fs/cifs or via mount parm. Unfortunately this is
597 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
600 wct = 10; /* lanman 2 style sessionsetup */
601 } else if ((type == NTLM) || (type == NTLMv2)) {
602 /* For NTLMv2 failures eventually may need to retry NTLM */
603 wct = 13; /* old style NTLM sessionsetup */
604 } else /* same size: negotiate or auth, NTLMSSP or extended security */
607 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
612 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
614 capabilities = cifs_ssetup_hdr(ses, pSMB);
616 /* we will send the SMB in three pieces:
617 a fixed length beginning part, an optional
618 SPNEGO blob (which can be zero length), and a
619 last part which will include the strings
620 and rest of bcc area. This allows us to avoid
621 a large buffer 17K allocation */
622 iov[0].iov_base = (char *)pSMB;
623 iov[0].iov_len = smb_buf->smb_buf_length + 4;
625 /* setting this here allows the code at the end of the function
626 to free the request buffer if there's an error */
627 resp_buf_type = CIFS_SMALL_BUFFER;
629 /* 2000 big enough to fit max user, domain, NOS name etc. */
630 str_area = kmalloc(2000, GFP_KERNEL);
631 if (str_area == NULL) {
637 ses->flags &= ~CIFS_SES_LANMAN;
639 iov[1].iov_base = NULL;
642 if (type == LANMAN) {
643 #ifdef CONFIG_CIFS_WEAK_PW_HASH
644 char lnm_session_key[CIFS_SESS_KEY_SIZE];
646 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
648 /* no capabilities flags in old lanman negotiation */
650 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
651 /* BB calculate hash with password */
652 /* and copy into bcc */
654 calc_lanman_hash(ses->password, ses->server->cryptKey,
655 ses->server->secMode & SECMODE_PW_ENCRYPT ?
656 true : false, lnm_session_key);
658 ses->flags |= CIFS_SES_LANMAN;
659 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
660 bcc_ptr += CIFS_SESS_KEY_SIZE;
662 /* can not sign if LANMAN negotiated so no need
663 to calculate signing key? but what if server
664 changed to do higher than lanman dialect and
665 we reconnected would we ever calc signing_key? */
667 cFYI(1, ("Negotiating LANMAN setting up strings"));
668 /* Unicode not allowed for LANMAN dialects */
669 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
671 } else if (type == NTLM) {
672 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
674 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
675 pSMB->req_no_secext.CaseInsensitivePasswordLength =
676 cpu_to_le16(CIFS_SESS_KEY_SIZE);
677 pSMB->req_no_secext.CaseSensitivePasswordLength =
678 cpu_to_le16(CIFS_SESS_KEY_SIZE);
680 /* calculate session key */
681 SMBNTencrypt(ses->password, ses->server->cryptKey,
684 if (first_time) /* should this be moved into common code
685 with similar ntlmv2 path? */
686 cifs_calculate_mac_key(&ses->server->mac_signing_key,
687 ntlm_session_key, ses->password);
688 /* copy session key */
690 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
691 bcc_ptr += CIFS_SESS_KEY_SIZE;
692 memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
693 bcc_ptr += CIFS_SESS_KEY_SIZE;
694 if (ses->capabilities & CAP_UNICODE) {
695 /* unicode strings must be word aligned */
696 if (iov[0].iov_len % 2) {
700 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
702 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
703 } else if (type == NTLMv2) {
705 kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
707 /* BB FIXME change all users of v2_sess_key to
708 struct ntlmv2_resp */
710 if (v2_sess_key == NULL) {
715 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
717 /* LM2 password would be here if we supported it */
718 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
719 /* cpu_to_le16(LM2_SESS_KEY_SIZE); */
721 pSMB->req_no_secext.CaseSensitivePasswordLength =
722 cpu_to_le16(sizeof(struct ntlmv2_resp));
724 /* calculate session key */
725 setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
726 /* FIXME: calculate MAC key */
727 memcpy(bcc_ptr, (char *)v2_sess_key,
728 sizeof(struct ntlmv2_resp));
729 bcc_ptr += sizeof(struct ntlmv2_resp);
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 || type == MSKerberos) {
740 #ifdef CONFIG_CIFS_UPCALL
741 struct cifs_spnego_msg *msg;
742 spnego_key = cifs_get_spnego_key(ses);
743 if (IS_ERR(spnego_key)) {
744 rc = PTR_ERR(spnego_key);
749 msg = spnego_key->payload.data;
750 /* check version field to make sure that cifs.upcall is
751 sending us a response in an expected form */
752 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
753 cERROR(1, ("incorrect version of cifs.upcall (expected"
755 CIFS_SPNEGO_UPCALL_VERSION, msg->version));
759 /* bail out if key is too long */
760 if (msg->sesskey_len >
761 sizeof(ses->server->mac_signing_key.data.krb5)) {
762 cERROR(1, ("Kerberos signing key too long (%u bytes)",
768 ses->server->mac_signing_key.len = msg->sesskey_len;
769 memcpy(ses->server->mac_signing_key.data.krb5,
770 msg->data, msg->sesskey_len);
772 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
773 capabilities |= CAP_EXTENDED_SECURITY;
774 pSMB->req.Capabilities = cpu_to_le32(capabilities);
775 iov[1].iov_base = msg->data + msg->sesskey_len;
776 iov[1].iov_len = msg->secblob_len;
777 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
779 if (ses->capabilities & CAP_UNICODE) {
780 /* unicode strings must be word aligned */
781 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
785 unicode_oslm_strings(&bcc_ptr, nls_cp);
786 unicode_domain_string(&bcc_ptr, ses, nls_cp);
788 /* BB: is this right? */
789 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
790 #else /* ! CONFIG_CIFS_UPCALL */
791 cERROR(1, ("Kerberos negotiated but upcall support disabled!"));
794 #endif /* CONFIG_CIFS_UPCALL */
796 #ifdef CONFIG_CIFS_EXPERIMENTAL
797 if (type == RawNTLMSSP) {
798 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
799 cERROR(1, ("NTLMSSP requires Unicode support"));
804 cFYI(1, ("ntlmssp session setup phase %d", phase));
805 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
806 capabilities |= CAP_EXTENDED_SECURITY;
807 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
808 if (phase == NtLmNegotiate) {
809 setup_ntlmssp_neg_req(pSMB, ses);
810 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
811 } else if (phase == NtLmAuthenticate) {
813 blob_len = setup_ntlmssp_auth_req(pSMB, ses,
816 iov[1].iov_len = blob_len;
817 /* Make sure that we tell the server that we
818 are using the uid that it just gave us back
819 on the response (challenge) */
820 smb_buf->Uid = ses->Suid;
822 cERROR(1, ("invalid phase %d", phase));
826 iov[1].iov_base = &pSMB->req.SecurityBlob[0];
827 /* unicode strings must be word aligned */
828 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
832 unicode_oslm_strings(&bcc_ptr, nls_cp);
834 cERROR(1, ("secType %d not supported!", type));
839 cERROR(1, ("secType %d not supported!", type));
845 iov[2].iov_base = str_area;
846 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
848 count = iov[1].iov_len + iov[2].iov_len;
849 smb_buf->smb_buf_length += count;
851 BCC_LE(smb_buf) = cpu_to_le16(count);
853 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
854 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
855 /* SMB request buf freed in SendReceive2 */
857 cFYI(1, ("ssetup rc from sendrecv2 is %d", rc));
859 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
860 smb_buf = (struct smb_hdr *)iov[0].iov_base;
862 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
863 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
864 if (phase != NtLmNegotiate) {
865 cERROR(1, ("Unexpected more processing error"));
868 /* NTLMSSP Negotiate sent now processing challenge (response) */
869 phase = NtLmChallenge; /* process ntlmssp challenge */
870 rc = 0; /* MORE_PROC rc is not an error here, but expected */
875 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
877 cERROR(1, ("bad word count %d", smb_buf->WordCount));
880 action = le16_to_cpu(pSMB->resp.Action);
881 if (action & GUEST_LOGIN)
882 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
883 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
884 cFYI(1, ("UID = %d ", ses->Suid));
885 /* response can have either 3 or 4 word count - Samba sends 3 */
886 /* and lanman response is 3 */
887 bytes_remaining = BCC(smb_buf);
888 bcc_ptr = pByteArea(smb_buf);
890 if (smb_buf->WordCount == 4) {
892 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
893 if (blob_len > bytes_remaining) {
894 cERROR(1, ("bad security blob length %d", blob_len));
898 if (phase == NtLmChallenge) {
899 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
900 /* now goto beginning for ntlmssp authenticate phase */
905 bytes_remaining -= blob_len;
908 /* BB check if Unicode and decode strings */
909 if (bytes_remaining == 0) {
910 /* no string area to decode, do nothing */
911 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
912 /* unicode string area must be word-aligned */
913 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
917 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
919 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
925 key_revoke(spnego_key);
929 if (resp_buf_type == CIFS_SMALL_BUFFER) {
930 cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base));
931 cifs_small_buf_release(iov[0].iov_base);
932 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
933 cifs_buf_release(iov[0].iov_base);
935 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
936 if ((phase == NtLmChallenge) && (rc == 0))
937 goto ssetup_ntlmssp_authenticate;