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_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32,
172 bcc_ptr += 2 * bytes_ret;
173 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release,
175 bcc_ptr += 2 * bytes_ret;
176 bcc_ptr += 2; /* trailing null */
178 bytes_ret = cifs_strtoUTF16((__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_strtoUTF16((__le16 *) bcc_ptr, ses->domainName,
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_strtoUTF16((__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, 256);
260 bcc_ptr += strnlen(ses->domainName, 256);
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_utf16(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_utf16(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_utf16(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 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);
397 if (tioffset > blob_len || tioffset + tilen > blob_len) {
398 cERROR(1, "tioffset + tilen too high %u + %u", tioffset, tilen);
402 ses->auth_key.response = kmalloc(tilen, GFP_KERNEL);
403 if (!ses->auth_key.response) {
404 cERROR(1, "Challenge target info allocation failure");
407 memcpy(ses->auth_key.response, bcc_ptr + tioffset, tilen);
408 ses->auth_key.len = tilen;
414 /* BB Move to ntlmssp.c eventually */
416 /* We do not malloc the blob, it is passed in pbuffer, because
417 it is fixed size, and small, making this approach cleaner */
418 void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
419 struct cifs_ses *ses)
421 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
424 memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
425 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
426 sec_blob->MessageType = NtLmNegotiate;
428 /* BB is NTLMV2 session security format easier to use here? */
429 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
430 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
431 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
432 if (ses->server->sec_mode &
433 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
434 flags |= NTLMSSP_NEGOTIATE_SIGN;
435 if (!ses->server->session_estab)
436 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
439 sec_blob->NegotiateFlags = cpu_to_le32(flags);
441 sec_blob->WorkstationName.BufferOffset = 0;
442 sec_blob->WorkstationName.Length = 0;
443 sec_blob->WorkstationName.MaximumLength = 0;
445 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
446 sec_blob->DomainName.BufferOffset = 0;
447 sec_blob->DomainName.Length = 0;
448 sec_blob->DomainName.MaximumLength = 0;
451 /* We do not malloc the blob, it is passed in pbuffer, because its
452 maximum possible size is fixed and small, making this approach cleaner.
453 This function returns the length of the data in the blob */
454 int build_ntlmssp_auth_blob(unsigned char *pbuffer,
456 struct cifs_ses *ses,
457 const struct nls_table *nls_cp)
460 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
464 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
465 sec_blob->MessageType = NtLmAuthenticate;
467 flags = NTLMSSP_NEGOTIATE_56 |
468 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
469 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
470 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
471 if (ses->server->sec_mode &
472 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
473 flags |= NTLMSSP_NEGOTIATE_SIGN;
474 if (!ses->server->session_estab)
475 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
478 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
479 sec_blob->NegotiateFlags = cpu_to_le32(flags);
481 sec_blob->LmChallengeResponse.BufferOffset =
482 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
483 sec_blob->LmChallengeResponse.Length = 0;
484 sec_blob->LmChallengeResponse.MaximumLength = 0;
486 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
487 rc = setup_ntlmv2_rsp(ses, nls_cp);
489 cERROR(1, "Error %d during NTLMSSP authentication", rc);
490 goto setup_ntlmv2_ret;
492 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
493 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
494 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
496 sec_blob->NtChallengeResponse.Length =
497 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
498 sec_blob->NtChallengeResponse.MaximumLength =
499 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
501 if (ses->domainName == NULL) {
502 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
503 sec_blob->DomainName.Length = 0;
504 sec_blob->DomainName.MaximumLength = 0;
508 len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
509 MAX_USERNAME_SIZE, nls_cp);
510 len *= 2; /* unicode is 2 bytes each */
511 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
512 sec_blob->DomainName.Length = cpu_to_le16(len);
513 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
517 if (ses->user_name == NULL) {
518 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
519 sec_blob->UserName.Length = 0;
520 sec_blob->UserName.MaximumLength = 0;
524 len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
525 MAX_USERNAME_SIZE, nls_cp);
526 len *= 2; /* unicode is 2 bytes each */
527 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
528 sec_blob->UserName.Length = cpu_to_le16(len);
529 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
533 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
534 sec_blob->WorkstationName.Length = 0;
535 sec_blob->WorkstationName.MaximumLength = 0;
538 if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
539 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
540 && !calc_seckey(ses)) {
541 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
542 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
543 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
544 sec_blob->SessionKey.MaximumLength =
545 cpu_to_le16(CIFS_CPHTXT_SIZE);
546 tmp += CIFS_CPHTXT_SIZE;
548 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
549 sec_blob->SessionKey.Length = 0;
550 sec_blob->SessionKey.MaximumLength = 0;
554 *buflen = tmp - pbuffer;
559 CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
560 const struct nls_table *nls_cp)
564 struct smb_hdr *smb_buf;
567 SESSION_SETUP_ANDX *pSMB;
572 enum securityEnum type;
573 __u16 action, bytes_remaining;
574 struct key *spnego_key = NULL;
575 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
577 char *ntlmsspblob = NULL;
582 type = ses->server->secType;
583 cFYI(1, "sess setup type %d", type);
584 if (type == RawNTLMSSP) {
585 /* if memory allocation is successful, caller of this function
588 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
593 ssetup_ntlmssp_authenticate:
594 if (phase == NtLmChallenge)
595 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
597 if (type == LANMAN) {
598 #ifndef CONFIG_CIFS_WEAK_PW_HASH
599 /* LANMAN and plaintext are less secure and off by default.
600 So we make this explicitly be turned on in kconfig (in the
601 build) and turned on at runtime (changed from the default)
602 in proc/fs/cifs or via mount parm. Unfortunately this is
603 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
606 wct = 10; /* lanman 2 style sessionsetup */
607 } else if ((type == NTLM) || (type == NTLMv2)) {
608 /* For NTLMv2 failures eventually may need to retry NTLM */
609 wct = 13; /* old style NTLM sessionsetup */
610 } else /* same size: negotiate or auth, NTLMSSP or extended security */
613 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
618 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
620 capabilities = cifs_ssetup_hdr(ses, pSMB);
622 /* we will send the SMB in three pieces:
623 a fixed length beginning part, an optional
624 SPNEGO blob (which can be zero length), and a
625 last part which will include the strings
626 and rest of bcc area. This allows us to avoid
627 a large buffer 17K allocation */
628 iov[0].iov_base = (char *)pSMB;
629 iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
631 /* setting this here allows the code at the end of the function
632 to free the request buffer if there's an error */
633 resp_buf_type = CIFS_SMALL_BUFFER;
635 /* 2000 big enough to fit max user, domain, NOS name etc. */
636 str_area = kmalloc(2000, GFP_KERNEL);
637 if (str_area == NULL) {
643 ses->flags &= ~CIFS_SES_LANMAN;
645 iov[1].iov_base = NULL;
648 if (type == LANMAN) {
649 #ifdef CONFIG_CIFS_WEAK_PW_HASH
650 char lnm_session_key[CIFS_AUTH_RESP_SIZE];
652 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
654 /* no capabilities flags in old lanman negotiation */
656 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
658 /* Calculate hash with password and copy into bcc_ptr.
659 * Encryption Key (stored as in cryptkey) gets used if the
660 * security mode bit in Negottiate Protocol response states
661 * to use challenge/response method (i.e. Password bit is 1).
664 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
665 ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
666 true : false, lnm_session_key);
668 ses->flags |= CIFS_SES_LANMAN;
669 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
670 bcc_ptr += CIFS_AUTH_RESP_SIZE;
672 /* can not sign if LANMAN negotiated so no need
673 to calculate signing key? but what if server
674 changed to do higher than lanman dialect and
675 we reconnected would we ever calc signing_key? */
677 cFYI(1, "Negotiating LANMAN setting up strings");
678 /* Unicode not allowed for LANMAN dialects */
679 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
681 } else if (type == NTLM) {
682 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
683 pSMB->req_no_secext.CaseInsensitivePasswordLength =
684 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
685 pSMB->req_no_secext.CaseSensitivePasswordLength =
686 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
688 /* calculate ntlm response and session key */
689 rc = setup_ntlm_response(ses, nls_cp);
691 cERROR(1, "Error %d during NTLM authentication", rc);
695 /* copy ntlm response */
696 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
697 CIFS_AUTH_RESP_SIZE);
698 bcc_ptr += CIFS_AUTH_RESP_SIZE;
699 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
700 CIFS_AUTH_RESP_SIZE);
701 bcc_ptr += CIFS_AUTH_RESP_SIZE;
703 if (ses->capabilities & CAP_UNICODE) {
704 /* unicode strings must be word aligned */
705 if (iov[0].iov_len % 2) {
709 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
711 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
712 } else if (type == NTLMv2) {
713 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
715 /* LM2 password would be here if we supported it */
716 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
718 /* calculate nlmv2 response and session key */
719 rc = setup_ntlmv2_rsp(ses, nls_cp);
721 cERROR(1, "Error %d during NTLMv2 authentication", rc);
724 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
725 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
726 bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
728 /* set case sensitive password length after tilen may get
729 * assigned, tilen is 0 otherwise.
731 pSMB->req_no_secext.CaseSensitivePasswordLength =
732 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
734 if (ses->capabilities & CAP_UNICODE) {
735 if (iov[0].iov_len % 2) {
739 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
741 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
742 } else if (type == Kerberos) {
743 #ifdef CONFIG_CIFS_UPCALL
744 struct cifs_spnego_msg *msg;
746 spnego_key = cifs_get_spnego_key(ses);
747 if (IS_ERR(spnego_key)) {
748 rc = PTR_ERR(spnego_key);
753 msg = spnego_key->payload.data;
754 /* check version field to make sure that cifs.upcall is
755 sending us a response in an expected form */
756 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
757 cERROR(1, "incorrect version of cifs.upcall (expected"
759 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
764 ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL);
765 if (!ses->auth_key.response) {
766 cERROR(1, "Kerberos can't allocate (%u bytes) memory",
771 memcpy(ses->auth_key.response, msg->data, msg->sesskey_len);
772 ses->auth_key.len = msg->sesskey_len;
774 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
775 capabilities |= CAP_EXTENDED_SECURITY;
776 pSMB->req.Capabilities = cpu_to_le32(capabilities);
777 iov[1].iov_base = msg->data + msg->sesskey_len;
778 iov[1].iov_len = msg->secblob_len;
779 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
781 if (ses->capabilities & CAP_UNICODE) {
782 /* unicode strings must be word aligned */
783 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
787 unicode_oslm_strings(&bcc_ptr, nls_cp);
788 unicode_domain_string(&bcc_ptr, ses, nls_cp);
790 /* BB: is this right? */
791 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
792 #else /* ! CONFIG_CIFS_UPCALL */
793 cERROR(1, "Kerberos negotiated but upcall support disabled!");
796 #endif /* CONFIG_CIFS_UPCALL */
797 } else 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);
810 build_ntlmssp_negotiate_blob(
811 pSMB->req.SecurityBlob, ses);
812 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
813 iov[1].iov_base = pSMB->req.SecurityBlob;
814 pSMB->req.SecurityBlobLength =
815 cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
817 case NtLmAuthenticate:
819 * 5 is an empirical value, large enough to hold
820 * authenticate message plus max 10 of av paris,
821 * domain, user, workstation names, flags, etc.
823 ntlmsspblob = kzalloc(
824 5*sizeof(struct _AUTHENTICATE_MESSAGE),
827 cERROR(1, "Can't allocate NTLMSSP blob");
832 rc = build_ntlmssp_auth_blob(ntlmsspblob,
833 &blob_len, ses, nls_cp);
836 iov[1].iov_len = blob_len;
837 iov[1].iov_base = ntlmsspblob;
838 pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
840 * Make sure that we tell the server that we are using
841 * the uid that it just gave us back on the response
844 smb_buf->Uid = ses->Suid;
847 cERROR(1, "invalid phase %d", phase);
851 /* unicode strings must be word aligned */
852 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
856 unicode_oslm_strings(&bcc_ptr, nls_cp);
858 cERROR(1, "secType %d not supported!", type);
863 iov[2].iov_base = str_area;
864 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
866 count = iov[1].iov_len + iov[2].iov_len;
867 smb_buf->smb_buf_length =
868 cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
870 put_bcc(count, smb_buf);
872 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
874 /* SMB request buf freed in SendReceive2 */
876 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
877 smb_buf = (struct smb_hdr *)iov[0].iov_base;
879 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
880 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
881 if (phase != NtLmNegotiate) {
882 cERROR(1, "Unexpected more processing error");
885 /* NTLMSSP Negotiate sent now processing challenge (response) */
886 phase = NtLmChallenge; /* process ntlmssp challenge */
887 rc = 0; /* MORE_PROC rc is not an error here, but expected */
892 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
894 cERROR(1, "bad word count %d", smb_buf->WordCount);
897 action = le16_to_cpu(pSMB->resp.Action);
898 if (action & GUEST_LOGIN)
899 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
900 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
901 cFYI(1, "UID = %llu ", ses->Suid);
902 /* response can have either 3 or 4 word count - Samba sends 3 */
903 /* and lanman response is 3 */
904 bytes_remaining = get_bcc(smb_buf);
905 bcc_ptr = pByteArea(smb_buf);
907 if (smb_buf->WordCount == 4) {
908 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
909 if (blob_len > bytes_remaining) {
910 cERROR(1, "bad security blob length %d", blob_len);
914 if (phase == NtLmChallenge) {
915 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
916 /* now goto beginning for ntlmssp authenticate phase */
921 bytes_remaining -= blob_len;
924 /* BB check if Unicode and decode strings */
925 if (bytes_remaining == 0) {
926 /* no string area to decode, do nothing */
927 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
928 /* unicode string area must be word-aligned */
929 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
933 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
935 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
941 key_invalidate(spnego_key);
947 if (resp_buf_type == CIFS_SMALL_BUFFER) {
948 cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base);
949 cifs_small_buf_release(iov[0].iov_base);
950 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
951 cifs_buf_release(iov[0].iov_base);
953 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
954 if ((phase == NtLmChallenge) && (rc == 0))
955 goto ssetup_ntlmssp_authenticate;