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 /* We do not malloc the blob, it is passed in pbuffer, because its
448 maximum possible size is fixed and small, making this approach cleaner.
449 This function returns the length of the data in the blob */
450 static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
452 struct cifs_ses *ses,
453 const struct nls_table *nls_cp)
456 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
460 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
461 sec_blob->MessageType = NtLmAuthenticate;
463 flags = NTLMSSP_NEGOTIATE_56 |
464 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
465 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
466 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
467 if (ses->server->sec_mode &
468 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
469 flags |= NTLMSSP_NEGOTIATE_SIGN;
470 if (!ses->server->session_estab)
471 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
474 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
475 sec_blob->NegotiateFlags = cpu_to_le32(flags);
477 sec_blob->LmChallengeResponse.BufferOffset =
478 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
479 sec_blob->LmChallengeResponse.Length = 0;
480 sec_blob->LmChallengeResponse.MaximumLength = 0;
482 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
483 if (ses->user_name != NULL) {
484 rc = setup_ntlmv2_rsp(ses, nls_cp);
486 cERROR(1, "Error %d during NTLMSSP authentication", rc);
487 goto setup_ntlmv2_ret;
489 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
490 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
491 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
493 sec_blob->NtChallengeResponse.Length =
494 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
495 sec_blob->NtChallengeResponse.MaximumLength =
496 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
499 * don't send an NT Response for anonymous access
501 sec_blob->NtChallengeResponse.Length = 0;
502 sec_blob->NtChallengeResponse.MaximumLength = 0;
505 if (ses->domainName == NULL) {
506 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
507 sec_blob->DomainName.Length = 0;
508 sec_blob->DomainName.MaximumLength = 0;
512 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
513 MAX_USERNAME_SIZE, nls_cp);
514 len *= 2; /* unicode is 2 bytes each */
515 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
516 sec_blob->DomainName.Length = cpu_to_le16(len);
517 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
521 if (ses->user_name == NULL) {
522 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
523 sec_blob->UserName.Length = 0;
524 sec_blob->UserName.MaximumLength = 0;
528 len = cifs_strtoUCS((__le16 *)tmp, ses->user_name,
529 MAX_USERNAME_SIZE, nls_cp);
530 len *= 2; /* unicode is 2 bytes each */
531 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
532 sec_blob->UserName.Length = cpu_to_le16(len);
533 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
537 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
538 sec_blob->WorkstationName.Length = 0;
539 sec_blob->WorkstationName.MaximumLength = 0;
542 if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
543 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
544 && !calc_seckey(ses)) {
545 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
546 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
547 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
548 sec_blob->SessionKey.MaximumLength =
549 cpu_to_le16(CIFS_CPHTXT_SIZE);
550 tmp += CIFS_CPHTXT_SIZE;
552 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
553 sec_blob->SessionKey.Length = 0;
554 sec_blob->SessionKey.MaximumLength = 0;
558 *buflen = tmp - pbuffer;
563 CIFS_SessSetup(unsigned int xid, struct cifs_ses *ses,
564 const struct nls_table *nls_cp)
568 struct smb_hdr *smb_buf;
571 SESSION_SETUP_ANDX *pSMB;
576 enum securityEnum type;
577 __u16 action, bytes_remaining;
578 struct key *spnego_key = NULL;
579 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
581 char *ntlmsspblob = NULL;
586 type = ses->server->secType;
587 cFYI(1, "sess setup type %d", type);
588 if (type == RawNTLMSSP) {
589 /* if memory allocation is successful, caller of this function
592 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
597 ssetup_ntlmssp_authenticate:
598 if (phase == NtLmChallenge)
599 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
601 if (type == LANMAN) {
602 #ifndef CONFIG_CIFS_WEAK_PW_HASH
603 /* LANMAN and plaintext are less secure and off by default.
604 So we make this explicitly be turned on in kconfig (in the
605 build) and turned on at runtime (changed from the default)
606 in proc/fs/cifs or via mount parm. Unfortunately this is
607 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
610 wct = 10; /* lanman 2 style sessionsetup */
611 } else if ((type == NTLM) || (type == NTLMv2)) {
612 /* For NTLMv2 failures eventually may need to retry NTLM */
613 wct = 13; /* old style NTLM sessionsetup */
614 } else /* same size: negotiate or auth, NTLMSSP or extended security */
617 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
622 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
624 capabilities = cifs_ssetup_hdr(ses, pSMB);
626 /* we will send the SMB in three pieces:
627 a fixed length beginning part, an optional
628 SPNEGO blob (which can be zero length), and a
629 last part which will include the strings
630 and rest of bcc area. This allows us to avoid
631 a large buffer 17K allocation */
632 iov[0].iov_base = (char *)pSMB;
633 iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
635 /* setting this here allows the code at the end of the function
636 to free the request buffer if there's an error */
637 resp_buf_type = CIFS_SMALL_BUFFER;
639 /* 2000 big enough to fit max user, domain, NOS name etc. */
640 str_area = kmalloc(2000, GFP_KERNEL);
641 if (str_area == NULL) {
647 ses->flags &= ~CIFS_SES_LANMAN;
649 iov[1].iov_base = NULL;
652 if (type == LANMAN) {
653 #ifdef CONFIG_CIFS_WEAK_PW_HASH
654 char lnm_session_key[CIFS_AUTH_RESP_SIZE];
656 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
658 if (ses->user_name != NULL) {
659 /* no capabilities flags in old lanman negotiation */
660 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
662 /* Calculate hash with password and copy into bcc_ptr.
663 * Encryption Key (stored as in cryptkey) gets used if the
664 * security mode bit in Negottiate Protocol response states
665 * to use challenge/response method (i.e. Password bit is 1).
667 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
668 ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
669 true : false, lnm_session_key);
671 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
672 bcc_ptr += CIFS_AUTH_RESP_SIZE;
674 pSMB->old_req.PasswordLength = 0;
676 ses->flags |= CIFS_SES_LANMAN;
678 /* can not sign if LANMAN negotiated so no need
679 to calculate signing key? but what if server
680 changed to do higher than lanman dialect and
681 we reconnected would we ever calc signing_key? */
683 cFYI(1, "Negotiating LANMAN setting up strings");
684 /* Unicode not allowed for LANMAN dialects */
685 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
687 } else if (type == NTLM) {
688 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
689 pSMB->req_no_secext.CaseInsensitivePasswordLength =
690 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
691 pSMB->req_no_secext.CaseSensitivePasswordLength =
692 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
694 /* calculate ntlm response and session key */
695 rc = setup_ntlm_response(ses, nls_cp);
697 cERROR(1, "Error %d during NTLM authentication", rc);
701 /* copy ntlm response */
702 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
703 CIFS_AUTH_RESP_SIZE);
704 bcc_ptr += CIFS_AUTH_RESP_SIZE;
705 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
706 CIFS_AUTH_RESP_SIZE);
707 bcc_ptr += CIFS_AUTH_RESP_SIZE;
709 if (ses->capabilities & CAP_UNICODE) {
710 /* unicode strings must be word aligned */
711 if (iov[0].iov_len % 2) {
715 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
717 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
718 } else if (type == NTLMv2) {
719 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
721 /* LM2 password would be here if we supported it */
722 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
724 /* calculate nlmv2 response and session key */
725 rc = setup_ntlmv2_rsp(ses, nls_cp);
727 cERROR(1, "Error %d during NTLMv2 authentication", rc);
730 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
731 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
732 bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
734 /* set case sensitive password length after tilen may get
735 * assigned, tilen is 0 otherwise.
737 pSMB->req_no_secext.CaseSensitivePasswordLength =
738 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
740 if (ses->capabilities & CAP_UNICODE) {
741 if (iov[0].iov_len % 2) {
745 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
747 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
748 } else if (type == Kerberos) {
749 #ifdef CONFIG_CIFS_UPCALL
750 struct cifs_spnego_msg *msg;
752 spnego_key = cifs_get_spnego_key(ses);
753 if (IS_ERR(spnego_key)) {
754 rc = PTR_ERR(spnego_key);
759 msg = spnego_key->payload.data;
760 /* check version field to make sure that cifs.upcall is
761 sending us a response in an expected form */
762 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
763 cERROR(1, "incorrect version of cifs.upcall (expected"
765 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
770 ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL);
771 if (!ses->auth_key.response) {
772 cERROR(1, "Kerberos can't allocate (%u bytes) memory",
777 memcpy(ses->auth_key.response, msg->data, msg->sesskey_len);
778 ses->auth_key.len = msg->sesskey_len;
780 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
781 capabilities |= CAP_EXTENDED_SECURITY;
782 pSMB->req.Capabilities = cpu_to_le32(capabilities);
783 iov[1].iov_base = msg->data + msg->sesskey_len;
784 iov[1].iov_len = msg->secblob_len;
785 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
787 if (ses->capabilities & CAP_UNICODE) {
788 /* unicode strings must be word aligned */
789 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
793 unicode_oslm_strings(&bcc_ptr, nls_cp);
794 unicode_domain_string(&bcc_ptr, ses, nls_cp);
796 /* BB: is this right? */
797 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
798 #else /* ! CONFIG_CIFS_UPCALL */
799 cERROR(1, "Kerberos negotiated but upcall support disabled!");
802 #endif /* CONFIG_CIFS_UPCALL */
803 } else if (type == RawNTLMSSP) {
804 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
805 cERROR(1, "NTLMSSP requires Unicode support");
810 cFYI(1, "ntlmssp session setup phase %d", phase);
811 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
812 capabilities |= CAP_EXTENDED_SECURITY;
813 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
816 build_ntlmssp_negotiate_blob(
817 pSMB->req.SecurityBlob, ses);
818 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
819 iov[1].iov_base = pSMB->req.SecurityBlob;
820 pSMB->req.SecurityBlobLength =
821 cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
823 case NtLmAuthenticate:
825 * 5 is an empirical value, large enough to hold
826 * authenticate message plus max 10 of av paris,
827 * domain, user, workstation names, flags, etc.
829 ntlmsspblob = kzalloc(
830 5*sizeof(struct _AUTHENTICATE_MESSAGE),
833 cERROR(1, "Can't allocate NTLMSSP blob");
838 rc = build_ntlmssp_auth_blob(ntlmsspblob,
839 &blob_len, ses, nls_cp);
842 iov[1].iov_len = blob_len;
843 iov[1].iov_base = ntlmsspblob;
844 pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
846 * Make sure that we tell the server that we are using
847 * the uid that it just gave us back on the response
850 smb_buf->Uid = ses->Suid;
853 cERROR(1, "invalid phase %d", phase);
857 /* unicode strings must be word aligned */
858 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
862 unicode_oslm_strings(&bcc_ptr, nls_cp);
864 cERROR(1, "secType %d not supported!", type);
869 iov[2].iov_base = str_area;
870 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
872 count = iov[1].iov_len + iov[2].iov_len;
873 smb_buf->smb_buf_length =
874 cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
876 put_bcc(count, smb_buf);
878 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
880 /* SMB request buf freed in SendReceive2 */
882 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
883 smb_buf = (struct smb_hdr *)iov[0].iov_base;
885 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
886 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
887 if (phase != NtLmNegotiate) {
888 cERROR(1, "Unexpected more processing error");
891 /* NTLMSSP Negotiate sent now processing challenge (response) */
892 phase = NtLmChallenge; /* process ntlmssp challenge */
893 rc = 0; /* MORE_PROC rc is not an error here, but expected */
898 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
900 cERROR(1, "bad word count %d", smb_buf->WordCount);
903 action = le16_to_cpu(pSMB->resp.Action);
904 if (action & GUEST_LOGIN)
905 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
906 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
907 cFYI(1, "UID = %d ", ses->Suid);
908 /* response can have either 3 or 4 word count - Samba sends 3 */
909 /* and lanman response is 3 */
910 bytes_remaining = get_bcc(smb_buf);
911 bcc_ptr = pByteArea(smb_buf);
913 if (smb_buf->WordCount == 4) {
914 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
915 if (blob_len > bytes_remaining) {
916 cERROR(1, "bad security blob length %d", blob_len);
920 if (phase == NtLmChallenge) {
921 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
922 /* now goto beginning for ntlmssp authenticate phase */
927 bytes_remaining -= blob_len;
930 /* BB check if Unicode and decode strings */
931 if (bytes_remaining == 0) {
932 /* no string area to decode, do nothing */
933 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
934 /* unicode string area must be word-aligned */
935 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
939 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
941 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
947 key_revoke(spnego_key);
953 if (resp_buf_type == CIFS_SMALL_BUFFER) {
954 cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base);
955 cifs_small_buf_release(iov[0].iov_base);
956 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
957 cifs_buf_release(iov[0].iov_base);
959 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
960 if ((phase == NtLmChallenge) && (rc == 0))
961 goto ssetup_ntlmssp_authenticate;