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 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 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 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 spin_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 */
227 bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName,
228 MAX_USERNAME_SIZE, nls_cp);
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 */
250 strncpy(bcc_ptr, ses->userName, MAX_USERNAME_SIZE);
252 bcc_ptr += strnlen(ses->userName, MAX_USERNAME_SIZE);
254 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 cifsSesInfo *ses,
281 const struct nls_table *nls_cp)
284 char *data = *pbcc_area;
286 cFYI(1, "bleft %d", bleft);
289 * Windows servers do not always double null terminate their final
290 * Unicode string. Check to see if there are an uneven number of bytes
291 * left. If so, then add an extra NULL pad byte to the end of the
294 * See section 2.7.2 in "Implementing CIFS" for details
301 kfree(ses->serverOS);
302 ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
303 cFYI(1, "serverOS=%s", ses->serverOS);
304 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
310 kfree(ses->serverNOS);
311 ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
312 cFYI(1, "serverNOS=%s", ses->serverNOS);
313 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
319 kfree(ses->serverDomain);
320 ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
321 cFYI(1, "serverDomain=%s", ses->serverDomain);
326 static int decode_ascii_ssetup(char **pbcc_area, int bleft,
327 struct cifsSesInfo *ses,
328 const struct nls_table *nls_cp)
332 char *bcc_ptr = *pbcc_area;
334 cFYI(1, "decode sessetup ascii. bleft %d", bleft);
336 len = strnlen(bcc_ptr, bleft);
340 kfree(ses->serverOS);
342 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
344 strncpy(ses->serverOS, bcc_ptr, len);
345 if (strncmp(ses->serverOS, "OS/2", 4) == 0) {
346 cFYI(1, "OS/2 server");
347 ses->flags |= CIFS_SES_OS2;
353 len = strnlen(bcc_ptr, bleft);
357 kfree(ses->serverNOS);
359 ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
361 strncpy(ses->serverNOS, bcc_ptr, len);
366 len = strnlen(bcc_ptr, bleft);
370 /* No domain field in LANMAN case. Domain is
371 returned by old servers in the SMB negprot response */
372 /* BB For newer servers which do not support Unicode,
373 but thus do return domain here we could add parsing
374 for it later, but it is not very important */
375 cFYI(1, "ascii: bytes left %d", bleft);
380 static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
381 struct cifsSesInfo *ses)
383 unsigned int tioffset; /* challenge message target info area */
384 unsigned int tilen; /* challenge message target info area length */
386 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
388 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
389 cERROR(1, "challenge blob len %d too small", blob_len);
393 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
394 cERROR(1, "blob signature incorrect %s", pblob->Signature);
397 if (pblob->MessageType != NtLmChallenge) {
398 cERROR(1, "Incorrect message type %d", pblob->MessageType);
402 memcpy(ses->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
403 /* BB we could decode pblob->NegotiateFlags; some may be useful */
404 /* In particular we can examine sign flags */
405 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
406 we must set the MIC field of the AUTHENTICATE_MESSAGE */
407 ses->ntlmssp.server_flags = le32_to_cpu(pblob->NegotiateFlags);
408 tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset);
409 tilen = cpu_to_le16(pblob->TargetInfoArray.Length);
412 ses->tiblob = kmalloc(tilen, GFP_KERNEL);
414 cERROR(1, "Challenge target info allocation failure");
418 memcpy(ses->tiblob, bcc_ptr + tioffset, ses->tilen);
424 #ifdef CONFIG_CIFS_EXPERIMENTAL
425 /* BB Move to ntlmssp.c eventually */
427 /* We do not malloc the blob, it is passed in pbuffer, because
428 it is fixed size, and small, making this approach cleaner */
429 static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
430 struct cifsSesInfo *ses)
432 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
435 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
436 sec_blob->MessageType = NtLmNegotiate;
438 /* BB is NTLMV2 session security format easier to use here? */
439 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
440 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
441 NTLMSSP_NEGOTIATE_NTLM;
442 if (ses->server->secMode &
443 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
444 flags |= NTLMSSP_NEGOTIATE_SIGN;
445 if (!ses->server->session_estab)
446 flags |= NTLMSSP_NEGOTIATE_KEY_XCH |
447 NTLMSSP_NEGOTIATE_EXTENDED_SEC;
450 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
452 sec_blob->WorkstationName.BufferOffset = 0;
453 sec_blob->WorkstationName.Length = 0;
454 sec_blob->WorkstationName.MaximumLength = 0;
456 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
457 sec_blob->DomainName.BufferOffset = 0;
458 sec_blob->DomainName.Length = 0;
459 sec_blob->DomainName.MaximumLength = 0;
462 /* We do not malloc the blob, it is passed in pbuffer, because its
463 maximum possible size is fixed and small, making this approach cleaner.
464 This function returns the length of the data in the blob */
465 static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
467 struct cifsSesInfo *ses,
468 const struct nls_table *nls_cp)
471 AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
475 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
476 sec_blob->MessageType = NtLmAuthenticate;
478 flags = NTLMSSP_NEGOTIATE_56 |
479 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
480 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
481 NTLMSSP_NEGOTIATE_NTLM;
482 if (ses->server->secMode &
483 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
484 flags |= NTLMSSP_NEGOTIATE_SIGN;
485 if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
486 flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
488 tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
489 sec_blob->NegotiateFlags |= cpu_to_le32(flags);
491 sec_blob->LmChallengeResponse.BufferOffset =
492 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
493 sec_blob->LmChallengeResponse.Length = 0;
494 sec_blob->LmChallengeResponse.MaximumLength = 0;
496 sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
497 rc = setup_ntlmv2_rsp(ses, nls_cp);
499 cERROR(1, "Error %d during NTLMSSP authentication", rc);
500 goto setup_ntlmv2_ret;
502 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
503 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
504 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
506 sec_blob->NtChallengeResponse.Length =
507 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
508 sec_blob->NtChallengeResponse.MaximumLength =
509 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
511 if (ses->domainName == NULL) {
512 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
513 sec_blob->DomainName.Length = 0;
514 sec_blob->DomainName.MaximumLength = 0;
518 len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
519 MAX_USERNAME_SIZE, nls_cp);
520 len *= 2; /* unicode is 2 bytes each */
521 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
522 sec_blob->DomainName.Length = cpu_to_le16(len);
523 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
527 if (ses->userName == NULL) {
528 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
529 sec_blob->UserName.Length = 0;
530 sec_blob->UserName.MaximumLength = 0;
534 len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
535 MAX_USERNAME_SIZE, nls_cp);
536 len *= 2; /* unicode is 2 bytes each */
537 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
538 sec_blob->UserName.Length = cpu_to_le16(len);
539 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
543 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
544 sec_blob->WorkstationName.Length = 0;
545 sec_blob->WorkstationName.MaximumLength = 0;
548 if ((ses->ntlmssp.server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) &&
550 memcpy(tmp, ses->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
551 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
552 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
553 sec_blob->SessionKey.MaximumLength =
554 cpu_to_le16(CIFS_CPHTXT_SIZE);
555 tmp += CIFS_CPHTXT_SIZE;
557 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
558 sec_blob->SessionKey.Length = 0;
559 sec_blob->SessionKey.MaximumLength = 0;
563 *buflen = tmp - pbuffer;
568 static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
569 struct cifsSesInfo *ses)
571 build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
572 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
579 CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
580 const struct nls_table *nls_cp)
584 struct smb_hdr *smb_buf;
587 SESSION_SETUP_ANDX *pSMB;
592 enum securityEnum type;
595 struct key *spnego_key = NULL;
596 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
598 char *ntlmsspblob = NULL;
603 type = ses->server->secType;
605 cFYI(1, "sess setup type %d", type);
606 ssetup_ntlmssp_authenticate:
607 if (phase == NtLmChallenge)
608 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
610 if (type == LANMAN) {
611 #ifndef CONFIG_CIFS_WEAK_PW_HASH
612 /* LANMAN and plaintext are less secure and off by default.
613 So we make this explicitly be turned on in kconfig (in the
614 build) and turned on at runtime (changed from the default)
615 in proc/fs/cifs or via mount parm. Unfortunately this is
616 needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
619 wct = 10; /* lanman 2 style sessionsetup */
620 } else if ((type == NTLM) || (type == NTLMv2)) {
621 /* For NTLMv2 failures eventually may need to retry NTLM */
622 wct = 13; /* old style NTLM sessionsetup */
623 } else /* same size: negotiate or auth, NTLMSSP or extended security */
626 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
631 pSMB = (SESSION_SETUP_ANDX *)smb_buf;
633 capabilities = cifs_ssetup_hdr(ses, pSMB);
635 /* we will send the SMB in three pieces:
636 a fixed length beginning part, an optional
637 SPNEGO blob (which can be zero length), and a
638 last part which will include the strings
639 and rest of bcc area. This allows us to avoid
640 a large buffer 17K allocation */
641 iov[0].iov_base = (char *)pSMB;
642 iov[0].iov_len = smb_buf->smb_buf_length + 4;
644 /* setting this here allows the code at the end of the function
645 to free the request buffer if there's an error */
646 resp_buf_type = CIFS_SMALL_BUFFER;
648 /* 2000 big enough to fit max user, domain, NOS name etc. */
649 str_area = kmalloc(2000, GFP_KERNEL);
650 if (str_area == NULL) {
656 ses->flags &= ~CIFS_SES_LANMAN;
658 iov[1].iov_base = NULL;
661 if (type == LANMAN) {
662 #ifdef CONFIG_CIFS_WEAK_PW_HASH
663 char lnm_session_key[CIFS_SESS_KEY_SIZE];
665 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
667 /* no capabilities flags in old lanman negotiation */
669 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
670 /* BB calculate hash with password */
671 /* and copy into bcc */
673 calc_lanman_hash(ses->password, ses->cryptKey,
674 ses->server->secMode & SECMODE_PW_ENCRYPT ?
675 true : false, lnm_session_key);
677 ses->flags |= CIFS_SES_LANMAN;
678 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
679 bcc_ptr += CIFS_SESS_KEY_SIZE;
681 /* can not sign if LANMAN negotiated so no need
682 to calculate signing key? but what if server
683 changed to do higher than lanman dialect and
684 we reconnected would we ever calc signing_key? */
686 cFYI(1, "Negotiating LANMAN setting up strings");
687 /* Unicode not allowed for LANMAN dialects */
688 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
690 } else if (type == NTLM) {
691 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
692 pSMB->req_no_secext.CaseInsensitivePasswordLength =
693 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
694 pSMB->req_no_secext.CaseSensitivePasswordLength =
695 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
697 /* calculate ntlm response and session key */
698 rc = setup_ntlm_response(ses);
700 cERROR(1, "Error %d during NTLM authentication", rc);
704 /* copy ntlm response */
705 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
706 CIFS_AUTH_RESP_SIZE);
707 bcc_ptr += CIFS_AUTH_RESP_SIZE;
708 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
709 CIFS_AUTH_RESP_SIZE);
710 bcc_ptr += CIFS_AUTH_RESP_SIZE;
712 if (ses->capabilities & CAP_UNICODE) {
713 /* unicode strings must be word aligned */
714 if (iov[0].iov_len % 2) {
718 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
720 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
721 } else if (type == NTLMv2) {
722 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
724 /* LM2 password would be here if we supported it */
725 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
727 /* calculate nlmv2 response and session key */
728 rc = setup_ntlmv2_rsp(ses, nls_cp);
730 cERROR(1, "Error %d during NTLMv2 authentication", rc);
733 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
734 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
735 bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
737 /* set case sensitive password length after tilen may get
738 * assigned, tilen is 0 otherwise.
740 pSMB->req_no_secext.CaseSensitivePasswordLength =
741 cpu_to_le16(ses->auth_key.len);
743 if (ses->capabilities & CAP_UNICODE) {
744 if (iov[0].iov_len % 2) {
748 unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
750 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
751 } else if (type == Kerberos) {
752 #ifdef CONFIG_CIFS_UPCALL
753 struct cifs_spnego_msg *msg;
755 spnego_key = cifs_get_spnego_key(ses);
756 if (IS_ERR(spnego_key)) {
757 rc = PTR_ERR(spnego_key);
762 msg = spnego_key->payload.data;
763 /* check version field to make sure that cifs.upcall is
764 sending us a response in an expected form */
765 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
766 cERROR(1, "incorrect version of cifs.upcall (expected"
768 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
773 ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL);
774 if (!ses->auth_key.response) {
775 cERROR(1, "Kerberos can't allocate (%u bytes) memory",
780 memcpy(ses->auth_key.response, msg->data, msg->sesskey_len);
781 ses->auth_key.len = msg->sesskey_len;
783 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
784 capabilities |= CAP_EXTENDED_SECURITY;
785 pSMB->req.Capabilities = cpu_to_le32(capabilities);
786 iov[1].iov_base = msg->data + msg->sesskey_len;
787 iov[1].iov_len = msg->secblob_len;
788 pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
790 if (ses->capabilities & CAP_UNICODE) {
791 /* unicode strings must be word aligned */
792 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
796 unicode_oslm_strings(&bcc_ptr, nls_cp);
797 unicode_domain_string(&bcc_ptr, ses, nls_cp);
799 /* BB: is this right? */
800 ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
801 #else /* ! CONFIG_CIFS_UPCALL */
802 cERROR(1, "Kerberos negotiated but upcall support disabled!");
805 #endif /* CONFIG_CIFS_UPCALL */
807 #ifdef CONFIG_CIFS_EXPERIMENTAL
808 if (type == RawNTLMSSP) {
809 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
810 cERROR(1, "NTLMSSP requires Unicode support");
815 cFYI(1, "ntlmssp session setup phase %d", phase);
816 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
817 capabilities |= CAP_EXTENDED_SECURITY;
818 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
819 if (phase == NtLmNegotiate) {
820 setup_ntlmssp_neg_req(pSMB, ses);
821 iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
822 iov[1].iov_base = &pSMB->req.SecurityBlob[0];
823 } else if (phase == NtLmAuthenticate) {
824 /* 5 is an empirical value, large enought to
825 * hold authenticate message, max 10 of
826 * av paris, doamin,user,workstation mames,
829 ntlmsspblob = kmalloc(
830 5*sizeof(struct _AUTHENTICATE_MESSAGE),
833 cERROR(1, "Can't allocate NTLMSSP");
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 =
845 cpu_to_le16(blob_len);
846 /* Make sure that we tell the server that we
847 are using the uid that it just gave us back
848 on the response (challenge) */
849 smb_buf->Uid = ses->Suid;
851 cERROR(1, "invalid phase %d", phase);
855 /* unicode strings must be word aligned */
856 if ((iov[0].iov_len + iov[1].iov_len) % 2) {
860 unicode_oslm_strings(&bcc_ptr, nls_cp);
862 cERROR(1, "secType %d not supported!", type);
867 cERROR(1, "secType %d not supported!", type);
873 iov[2].iov_base = str_area;
874 iov[2].iov_len = (long) bcc_ptr - (long) str_area;
876 count = iov[1].iov_len + iov[2].iov_len;
877 smb_buf->smb_buf_length += count;
879 BCC_LE(smb_buf) = cpu_to_le16(count);
881 rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
882 CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
883 /* SMB request buf freed in SendReceive2 */
885 pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
886 smb_buf = (struct smb_hdr *)iov[0].iov_base;
888 if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
889 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
890 if (phase != NtLmNegotiate) {
891 cERROR(1, "Unexpected more processing error");
894 /* NTLMSSP Negotiate sent now processing challenge (response) */
895 phase = NtLmChallenge; /* process ntlmssp challenge */
896 rc = 0; /* MORE_PROC rc is not an error here, but expected */
901 if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
903 cERROR(1, "bad word count %d", smb_buf->WordCount);
906 action = le16_to_cpu(pSMB->resp.Action);
907 if (action & GUEST_LOGIN)
908 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
909 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
910 cFYI(1, "UID = %d ", ses->Suid);
911 /* response can have either 3 or 4 word count - Samba sends 3 */
912 /* and lanman response is 3 */
913 bytes_remaining = BCC(smb_buf);
914 bcc_ptr = pByteArea(smb_buf);
916 if (smb_buf->WordCount == 4) {
917 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
918 if (blob_len > bytes_remaining) {
919 cERROR(1, "bad security blob length %d", blob_len);
923 if (phase == NtLmChallenge) {
924 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
925 /* now goto beginning for ntlmssp authenticate phase */
930 bytes_remaining -= blob_len;
933 /* BB check if Unicode and decode strings */
934 if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
935 /* unicode string area must be word-aligned */
936 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
940 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
942 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
948 key_revoke(spnego_key);
954 if (resp_buf_type == CIFS_SMALL_BUFFER) {
955 cFYI(1, "ssetup freeing small buf %p", iov[0].iov_base);
956 cifs_small_buf_release(iov[0].iov_base);
957 } else if (resp_buf_type == CIFS_LARGE_BUFFER)
958 cifs_buf_release(iov[0].iov_base);
960 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
961 if ((phase == NtLmChallenge) && (rc == 0))
962 goto ssetup_ntlmssp_authenticate;