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 cifs_ses *ses)
42 struct list_head *tmp;
43 struct cifs_ses *tmp_ses;
45 list_for_each(tmp, &ses->server->smb_ses_list) {
46 tmp_ses = list_entry(tmp, struct cifs_ses,
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 cifs_ses *ses)
67 struct list_head *tmp;
68 struct cifs_ses *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 cifs_ses,
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 cifs_ses *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(min_t(u32,
128 CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4,
130 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
131 pSMB->req.VcNumber = get_next_vcnum(ses);
133 /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
135 /* BB verify whether signing required on neg or just on auth frame
138 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
139 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
141 if (ses->server->sec_mode &
142 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
143 pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
145 if (ses->capabilities & CAP_UNICODE) {
146 pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE;
147 capabilities |= CAP_UNICODE;
149 if (ses->capabilities & CAP_STATUS32) {
150 pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS;
151 capabilities |= CAP_STATUS32;
153 if (ses->capabilities & CAP_DFS) {
154 pSMB->req.hdr.Flags2 |= SMBFLG2_DFS;
155 capabilities |= CAP_DFS;
157 if (ses->capabilities & CAP_UNIX)
158 capabilities |= CAP_UNIX;
164 unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp)
166 char *bcc_ptr = *pbcc_area;
169 /* Copy OS version */
170 bytes_ret = cifs_strtoUCS((__le16 *)bcc_ptr, "Linux version ", 32,
172 bcc_ptr += 2 * bytes_ret;
173 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, init_utsname()->release,
175 bcc_ptr += 2 * bytes_ret;
176 bcc_ptr += 2; /* trailing null */
178 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
180 bcc_ptr += 2 * bytes_ret;
181 bcc_ptr += 2; /* trailing null */
183 *pbcc_area = bcc_ptr;
186 static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses,
187 const struct nls_table *nls_cp)
189 char *bcc_ptr = *pbcc_area;
193 if (ses->domainName == NULL) {
194 /* Sending null domain better than using a bogus domain name (as
195 we did briefly in 2.6.18) since server will use its default */
200 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->domainName,
201 CIFS_MAX_DOMAINNAME_LEN, nls_cp);
202 bcc_ptr += 2 * bytes_ret;
203 bcc_ptr += 2; /* account for null terminator */
205 *pbcc_area = bcc_ptr;
209 static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
210 const struct nls_table *nls_cp)
212 char *bcc_ptr = *pbcc_area;
215 /* BB FIXME add check that strings total less
216 than 335 or will need to send them as arrays */
218 /* unicode strings, must be word aligned before the call */
219 /* if ((long) bcc_ptr % 2) {
224 if (ses->user_name == NULL) {
225 /* null user mount */
229 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->user_name,
230 MAX_USERNAME_SIZE, nls_cp);
232 bcc_ptr += 2 * bytes_ret;
233 bcc_ptr += 2; /* account for null termination */
235 unicode_domain_string(&bcc_ptr, ses, nls_cp);
236 unicode_oslm_strings(&bcc_ptr, nls_cp);
238 *pbcc_area = bcc_ptr;
241 static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
242 const struct nls_table *nls_cp)
244 char *bcc_ptr = *pbcc_area;
247 /* BB what about null user mounts - check that we do this BB */
249 if (ses->user_name != NULL) {
250 strncpy(bcc_ptr, ses->user_name, MAX_USERNAME_SIZE);
251 bcc_ptr += strnlen(ses->user_name, MAX_USERNAME_SIZE);
253 /* else null user mount */
255 bcc_ptr++; /* account for null termination */
258 if (ses->domainName != NULL) {
259 strncpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
260 bcc_ptr += strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
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 cifs_ses *ses,
281 const struct nls_table *nls_cp)
284 char *data = *pbcc_area;
286 cFYI(1, "bleft %d", bleft);
288 kfree(ses->serverOS);
289 ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
290 cFYI(1, "serverOS=%s", ses->serverOS);
291 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
297 kfree(ses->serverNOS);
298 ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
299 cFYI(1, "serverNOS=%s", ses->serverNOS);
300 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
306 kfree(ses->serverDomain);
307 ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
308 cFYI(1, "serverDomain=%s", ses->serverDomain);
313 static int decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
314 struct cifs_ses *ses,
315 const struct nls_table *nls_cp)
319 char *bcc_ptr = *pbcc_area;
321 cFYI(1, "decode sessetup ascii. bleft %d", bleft);
323 len = strnlen(bcc_ptr, bleft);
327 kfree(ses->serverOS);
329 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
331 strncpy(ses->serverOS, bcc_ptr, len);
332 if (strncmp(ses->serverOS, "OS/2", 4) == 0) {
333 cFYI(1, "OS/2 server");
334 ses->flags |= CIFS_SES_OS2;
340 len = strnlen(bcc_ptr, bleft);
344 kfree(ses->serverNOS);
346 ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
348 strncpy(ses->serverNOS, bcc_ptr, len);
353 len = strnlen(bcc_ptr, bleft);
357 /* No domain field in LANMAN case. Domain is
358 returned by old servers in the SMB negprot response */
359 /* BB For newer servers which do not support Unicode,
360 but thus do return domain here we could add parsing
361 for it later, but it is not very important */
362 cFYI(1, "ascii: bytes left %d", bleft);
367 static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
368 struct cifs_ses *ses)
370 unsigned int tioffset; /* challenge message target info area */
371 unsigned int tilen; /* challenge message target info area length */
373 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
375 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
376 cERROR(1, "challenge blob len %d too small", blob_len);
380 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
381 cERROR(1, "blob signature incorrect %s", pblob->Signature);
384 if (pblob->MessageType != NtLmChallenge) {
385 cERROR(1, "Incorrect message type %d", pblob->MessageType);
389 memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
390 /* BB we could decode pblob->NegotiateFlags; some may be useful */
391 /* In particular we can examine sign flags */
392 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
393 we must set the MIC field of the AUTHENTICATE_MESSAGE */
394 ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags);
395 tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset);
396 tilen = le16_to_cpu(pblob->TargetInfoArray.Length);
398 ses->auth_key.response = kmalloc(tilen, GFP_KERNEL);
399 if (!ses->auth_key.response) {
400 cERROR(1, "Challenge target info allocation failure");
403 memcpy(ses->auth_key.response, bcc_ptr + tioffset, tilen);
404 ses->auth_key.len = tilen;
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 cifs_ses *ses)
417 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
420 memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
421 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
422 sec_blob->MessageType = NtLmNegotiate;
424 /* BB is NTLMV2 session security format easier to use here? */
425 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
426 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
427 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
428 if (ses->server->sec_mode &
429 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
430 flags |= NTLMSSP_NEGOTIATE_SIGN;
431 if (!ses->server->session_estab)
432 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
435 sec_blob->NegotiateFlags = cpu_to_le32(flags);
437 sec_blob->WorkstationName.BufferOffset = 0;
438 sec_blob->WorkstationName.Length = 0;
439 sec_blob->WorkstationName.MaximumLength = 0;
441 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
442 sec_blob->DomainName.BufferOffset = 0;
443 sec_blob->DomainName.Length = 0;
444 sec_blob->DomainName.MaximumLength = 0;
447 static int size_of_ntlmssp_blob(struct cifs_ses *ses)
449 int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len
450 - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2;
453 sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
458 sz += 2 * strnlen(ses->user_name, MAX_USERNAME_SIZE);
465 static int build_ntlmssp_auth_blob(unsigned char **pbuffer,
467 struct cifs_ses *ses,
468 const struct nls_table *nls_cp)
471 AUTHENTICATE_MESSAGE *sec_blob;
475 rc = setup_ntlmv2_rsp(ses, nls_cp);
477 cERROR(1, "Error %d during NTLMSSP authentication", rc);
479 goto setup_ntlmv2_ret;
481 *pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL);
482 sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
484 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
485 sec_blob->MessageType = NtLmAuthenticate;
487 flags = NTLMSSP_NEGOTIATE_56 |
488 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
489 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
490 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
491 if (ses->server->sec_mode &
492 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
493 flags |= NTLMSSP_NEGOTIATE_SIGN;
494 if (!ses->server->session_estab)
495 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
498 tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE);
499 sec_blob->NegotiateFlags = cpu_to_le32(flags);
501 sec_blob->LmChallengeResponse.BufferOffset =
502 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
503 sec_blob->LmChallengeResponse.Length = 0;
504 sec_blob->LmChallengeResponse.MaximumLength = 0;
506 sec_blob->NtChallengeResponse.BufferOffset =
507 cpu_to_le32(tmp - *pbuffer);
508 if (ses->user_name != NULL) {
509 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
510 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
511 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
513 sec_blob->NtChallengeResponse.Length =
514 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
515 sec_blob->NtChallengeResponse.MaximumLength =
516 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
519 * don't send an NT Response for anonymous access
521 sec_blob->NtChallengeResponse.Length = 0;
522 sec_blob->NtChallengeResponse.MaximumLength = 0;
525 if (ses->domainName == NULL) {
526 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
527 sec_blob->DomainName.Length = 0;
528 sec_blob->DomainName.MaximumLength = 0;
532 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
533 MAX_USERNAME_SIZE, nls_cp);
534 len *= 2; /* unicode is 2 bytes each */
535 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
536 sec_blob->DomainName.Length = cpu_to_le16(len);
537 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
541 if (ses->user_name == NULL) {
542 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
543 sec_blob->UserName.Length = 0;
544 sec_blob->UserName.MaximumLength = 0;
548 len = cifs_strtoUCS((__le16 *)tmp, ses->user_name,
549 MAX_USERNAME_SIZE, nls_cp);
550 len *= 2; /* unicode is 2 bytes each */
551 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
552 sec_blob->UserName.Length = cpu_to_le16(len);
553 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
557 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
558 sec_blob->WorkstationName.Length = 0;
559 sec_blob->WorkstationName.MaximumLength = 0;
562 if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
563 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
564 && !calc_seckey(ses)) {
565 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
566 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
567 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
568 sec_blob->SessionKey.MaximumLength =
569 cpu_to_le16(CIFS_CPHTXT_SIZE);
570 tmp += CIFS_CPHTXT_SIZE;
572 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
573 sec_blob->SessionKey.Length = 0;
574 sec_blob->SessionKey.MaximumLength = 0;
577 *buflen = tmp - *pbuffer;
583 CIFS_SessSetup(unsigned int xid, struct cifs_ses *ses,
584 const struct nls_table *nls_cp)
588 struct smb_hdr *smb_buf;
591 SESSION_SETUP_ANDX *pSMB;
596 enum securityEnum type;
597 __u16 action, bytes_remaining;
598 struct key *spnego_key = NULL;
599 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
601 unsigned char *ntlmsspblob = NULL;
606 type = ses->server->secType;
607 cFYI(1, "sess setup type %d", type);
608 if (type == RawNTLMSSP) {
609 /* if memory allocation is successful, caller of this function
612 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
617 ssetup_ntlmssp_authenticate:
618 if (phase == NtLmChallenge)
619 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
621 if (type == LANMAN) {
622 #ifndef CONFIG_CIFS_WEAK_PW_HASH
623 /* LANMAN and plaintext are less secure and off by default.
624 So we make this explicitly be turned on in kconfig (in the
625 build) and turned on at runtime (changed from the default)
626 in proc/fs/cifs or via mount parm. Unfortunately this is
627 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
630 wct = 10; /* lanman 2 style sessionsetup */
631 } else if ((type == NTLM) || (type == NTLMv2)) {
632 /* For NTLMv2 failures eventually may need to retry NTLM */
633 wct = 13; /* old style NTLM sessionsetup */
634 } else /* same size: negotiate or auth, NTLMSSP or extended security */
637 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
642 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
644 capabilities = cifs_ssetup_hdr(ses, pSMB);
646 /* we will send the SMB in three pieces:
647 a fixed length beginning part, an optional
648 SPNEGO blob (which can be zero length), and a
649 last part which will include the strings
650 and rest of bcc area. This allows us to avoid
651 a large buffer 17K allocation */
652 iov[0].iov_base = (char *)pSMB;
653 iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
655 /* setting this here allows the code at the end of the function
656 to free the request buffer if there's an error */
657 resp_buf_type = CIFS_SMALL_BUFFER;
659 /* 2000 big enough to fit max user, domain, NOS name etc. */
660 str_area = kmalloc(2000, GFP_KERNEL);
661 if (str_area == NULL) {
667 ses->flags &= ~CIFS_SES_LANMAN;
669 iov[1].iov_base = NULL;
672 if (type == LANMAN) {
673 #ifdef CONFIG_CIFS_WEAK_PW_HASH
674 char lnm_session_key[CIFS_AUTH_RESP_SIZE];
676 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
678 if (ses->user_name != NULL) {
679 /* no capabilities flags in old lanman negotiation */
680 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
682 /* Calculate hash with password and copy into bcc_ptr.
683 * Encryption Key (stored as in cryptkey) gets used if the
684 * security mode bit in Negottiate Protocol response states
685 * to use challenge/response method (i.e. Password bit is 1).
687 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
688 ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
689 true : false, lnm_session_key);
691 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
692 bcc_ptr += CIFS_AUTH_RESP_SIZE;
694 pSMB->old_req.PasswordLength = 0;
696 ses->flags |= CIFS_SES_LANMAN;
698 /* can not sign if LANMAN negotiated so no need
699 to calculate signing key? but what if server
700 changed to do higher than lanman dialect and
701 we reconnected would we ever calc signing_key? */
703 cFYI(1, "Negotiating LANMAN setting up strings");
704 /* Unicode not allowed for LANMAN dialects */
705 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
707 } else if (type == NTLM) {
708 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
709 if (ses->user_name != NULL) {
710 pSMB->req_no_secext.CaseInsensitivePasswordLength =
711 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
712 pSMB->req_no_secext.CaseSensitivePasswordLength =
713 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
715 /* calculate ntlm response and session key */
716 rc = setup_ntlm_response(ses, nls_cp);
718 cERROR(1, "Error %d during NTLM authentication",
723 /* copy ntlm response */
724 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
725 CIFS_AUTH_RESP_SIZE);
726 bcc_ptr += CIFS_AUTH_RESP_SIZE;
727 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
728 CIFS_AUTH_RESP_SIZE);
729 bcc_ptr += CIFS_AUTH_RESP_SIZE;
731 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
732 pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
735 if (ses->capabilities & CAP_UNICODE) {
736 /* unicode strings must be word aligned */
737 if (iov[0].iov_len % 2) {
741 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
743 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
744 } else if (type == NTLMv2) {
745 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
747 /* LM2 password would be here if we supported it */
748 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
750 if (ses->user_name != NULL) {
751 /* calculate nlmv2 response and session key */
752 rc = setup_ntlmv2_rsp(ses, nls_cp);
754 cERROR(1, "Error %d during NTLMv2 authentication", rc);
758 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
759 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
760 bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
762 /* set case sensitive password length after tilen may get
763 * assigned, tilen is 0 otherwise.
765 pSMB->req_no_secext.CaseSensitivePasswordLength =
766 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
768 pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
771 if (ses->capabilities & CAP_UNICODE) {
772 if (iov[0].iov_len % 2) {
776 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
778 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
779 } else if (type == Kerberos) {
780 #ifdef CONFIG_CIFS_UPCALL
781 struct cifs_spnego_msg *msg;
783 spnego_key = cifs_get_spnego_key(ses);
784 if (IS_ERR(spnego_key)) {
785 rc = PTR_ERR(spnego_key);
790 msg = spnego_key->payload.data;
791 /* check version field to make sure that cifs.upcall is
792 sending us a response in an expected form */
793 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
794 cERROR(1, "incorrect version of cifs.upcall (expected"
796 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
801 ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL);
802 if (!ses->auth_key.response) {
803 cERROR(1, "Kerberos can't allocate (%u bytes) memory",
808 memcpy(ses->auth_key.response, msg->data, msg->sesskey_len);
809 ses->auth_key.len = msg->sesskey_len;
811 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
812 capabilities |= CAP_EXTENDED_SECURITY;
813 pSMB->req.Capabilities = cpu_to_le32(capabilities);
814 iov[1].iov_base = msg->data + msg->sesskey_len;
815 iov[1].iov_len = msg->secblob_len;
816 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
818 if (ses->capabilities & CAP_UNICODE) {
819 /* unicode strings must be word aligned */
820 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
824 unicode_oslm_strings(&bcc_ptr, nls_cp);
825 unicode_domain_string(&bcc_ptr, ses, nls_cp);
827 /* BB: is this right? */
828 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
829 #else /* ! CONFIG_CIFS_UPCALL */
830 cERROR(1, "Kerberos negotiated but upcall support disabled!");
833 #endif /* CONFIG_CIFS_UPCALL */
834 } else if (type == RawNTLMSSP) {
835 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
836 cERROR(1, "NTLMSSP requires Unicode support");
841 cFYI(1, "ntlmssp session setup phase %d", phase);
842 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
843 capabilities |= CAP_EXTENDED_SECURITY;
844 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
847 build_ntlmssp_negotiate_blob(
848 pSMB->req.SecurityBlob, ses);
849 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
850 iov[1].iov_base = pSMB->req.SecurityBlob;
851 pSMB->req.SecurityBlobLength =
852 cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
854 case NtLmAuthenticate:
855 rc = build_ntlmssp_auth_blob(&ntlmsspblob,
856 &blob_len, ses, nls_cp);
859 iov[1].iov_len = blob_len;
860 iov[1].iov_base = ntlmsspblob;
861 pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
863 * Make sure that we tell the server that we are using
864 * the uid that it just gave us back on the response
867 smb_buf->Uid = ses->Suid;
870 cERROR(1, "invalid phase %d", phase);
874 /* unicode strings must be word aligned */
875 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
879 unicode_oslm_strings(&bcc_ptr, nls_cp);
881 cERROR(1, "secType %d not supported!", type);
886 iov[2].iov_base = str_area;
887 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
889 count = iov[1].iov_len + iov[2].iov_len;
890 smb_buf->smb_buf_length =
891 cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
893 put_bcc(count, smb_buf);
895 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
897 /* SMB request buf freed in SendReceive2 */
899 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
900 smb_buf = (struct smb_hdr *)iov[0].iov_base;
902 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
903 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
904 if (phase != NtLmNegotiate) {
905 cERROR(1, "Unexpected more processing error");
908 /* NTLMSSP Negotiate sent now processing challenge (response) */
909 phase = NtLmChallenge; /* process ntlmssp challenge */
910 rc = 0; /* MORE_PROC rc is not an error here, but expected */
915 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
917 cERROR(1, "bad word count %d", smb_buf->WordCount);
920 action = le16_to_cpu(pSMB->resp.Action);
921 if (action & GUEST_LOGIN)
922 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
923 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
924 cFYI(1, "UID = %d ", ses->Suid);
925 /* response can have either 3 or 4 word count - Samba sends 3 */
926 /* and lanman response is 3 */
927 bytes_remaining = get_bcc(smb_buf);
928 bcc_ptr = pByteArea(smb_buf);
930 if (smb_buf->WordCount == 4) {
931 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
932 if (blob_len > bytes_remaining) {
933 cERROR(1, "bad security blob length %d", blob_len);
937 if (phase == NtLmChallenge) {
938 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
939 /* now goto beginning for ntlmssp authenticate phase */
944 bytes_remaining -= blob_len;
947 /* BB check if Unicode and decode strings */
948 if (bytes_remaining == 0) {
949 /* no string area to decode, do nothing */
950 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
951 /* unicode string area must be word-aligned */
952 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
956 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
958 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
964 key_revoke(spnego_key);
970 if (resp_buf_type == CIFS_SMALL_BUFFER) {
971 cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base);
972 cifs_small_buf_release(iov[0].iov_base);
973 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
974 cifs_buf_release(iov[0].iov_base);
976 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
977 if ((phase == NtLmChallenge) && (rc == 0))
978 goto ssetup_ntlmssp_authenticate;