4 * SMB/CIFS session setup handling routines
6 * Copyright (c) International Business Machines Corp., 2006, 2009
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"
35 static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB)
37 __u32 capabilities = 0;
39 /* init fields common to all four types of SessSetup */
40 /* Note that offsets for first seven fields in req struct are same */
41 /* in CIFS Specs so does not matter which of 3 forms of struct */
42 /* that we use in next few lines */
43 /* Note that header is initialized to zero in header_assemble */
44 pSMB->req.AndXCommand = 0xFF;
45 pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32,
46 CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4,
48 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
49 pSMB->req.VcNumber = cpu_to_le16(1);
51 /* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
53 /* BB verify whether signing required on neg or just on auth frame
56 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
57 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
59 if (ses->server->sign)
60 pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
62 if (ses->capabilities & CAP_UNICODE) {
63 pSMB->req.hdr.Flags2 |= SMBFLG2_UNICODE;
64 capabilities |= CAP_UNICODE;
66 if (ses->capabilities & CAP_STATUS32) {
67 pSMB->req.hdr.Flags2 |= SMBFLG2_ERR_STATUS;
68 capabilities |= CAP_STATUS32;
70 if (ses->capabilities & CAP_DFS) {
71 pSMB->req.hdr.Flags2 |= SMBFLG2_DFS;
72 capabilities |= CAP_DFS;
74 if (ses->capabilities & CAP_UNIX)
75 capabilities |= CAP_UNIX;
81 unicode_oslm_strings(char **pbcc_area, const struct nls_table *nls_cp)
83 char *bcc_ptr = *pbcc_area;
87 bytes_ret = cifs_strtoUTF16((__le16 *)bcc_ptr, "Linux version ", 32,
89 bcc_ptr += 2 * bytes_ret;
90 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, init_utsname()->release,
92 bcc_ptr += 2 * bytes_ret;
93 bcc_ptr += 2; /* trailing null */
95 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
97 bcc_ptr += 2 * bytes_ret;
98 bcc_ptr += 2; /* trailing null */
100 *pbcc_area = bcc_ptr;
103 static void unicode_domain_string(char **pbcc_area, struct cifs_ses *ses,
104 const struct nls_table *nls_cp)
106 char *bcc_ptr = *pbcc_area;
110 if (ses->domainName == NULL) {
111 /* Sending null domain better than using a bogus domain name (as
112 we did briefly in 2.6.18) since server will use its default */
117 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->domainName,
118 CIFS_MAX_DOMAINNAME_LEN, nls_cp);
119 bcc_ptr += 2 * bytes_ret;
120 bcc_ptr += 2; /* account for null terminator */
122 *pbcc_area = bcc_ptr;
126 static void unicode_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
127 const struct nls_table *nls_cp)
129 char *bcc_ptr = *pbcc_area;
132 /* BB FIXME add check that strings total less
133 than 335 or will need to send them as arrays */
135 /* unicode strings, must be word aligned before the call */
136 /* if ((long) bcc_ptr % 2) {
141 if (ses->user_name == NULL) {
142 /* null user mount */
146 bytes_ret = cifs_strtoUTF16((__le16 *) bcc_ptr, ses->user_name,
147 CIFS_MAX_USERNAME_LEN, nls_cp);
149 bcc_ptr += 2 * bytes_ret;
150 bcc_ptr += 2; /* account for null termination */
152 unicode_domain_string(&bcc_ptr, ses, nls_cp);
153 unicode_oslm_strings(&bcc_ptr, nls_cp);
155 *pbcc_area = bcc_ptr;
158 static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses,
159 const struct nls_table *nls_cp)
161 char *bcc_ptr = *pbcc_area;
164 /* BB what about null user mounts - check that we do this BB */
166 if (ses->user_name != NULL) {
167 strncpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN);
168 bcc_ptr += strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
170 /* else null user mount */
172 bcc_ptr++; /* account for null termination */
175 if (ses->domainName != NULL) {
176 strncpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
177 bcc_ptr += strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
178 } /* else we will send a null domain name
179 so the server will default to its own domain */
183 /* BB check for overflow here */
185 strcpy(bcc_ptr, "Linux version ");
186 bcc_ptr += strlen("Linux version ");
187 strcpy(bcc_ptr, init_utsname()->release);
188 bcc_ptr += strlen(init_utsname()->release) + 1;
190 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
191 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
193 *pbcc_area = bcc_ptr;
197 decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses,
198 const struct nls_table *nls_cp)
201 char *data = *pbcc_area;
203 cifs_dbg(FYI, "bleft %d\n", bleft);
205 kfree(ses->serverOS);
206 ses->serverOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
207 cifs_dbg(FYI, "serverOS=%s\n", ses->serverOS);
208 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
214 kfree(ses->serverNOS);
215 ses->serverNOS = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
216 cifs_dbg(FYI, "serverNOS=%s\n", ses->serverNOS);
217 len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
223 kfree(ses->serverDomain);
224 ses->serverDomain = cifs_strndup_from_utf16(data, bleft, true, nls_cp);
225 cifs_dbg(FYI, "serverDomain=%s\n", ses->serverDomain);
230 static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
231 struct cifs_ses *ses,
232 const struct nls_table *nls_cp)
235 char *bcc_ptr = *pbcc_area;
237 cifs_dbg(FYI, "decode sessetup ascii. bleft %d\n", bleft);
239 len = strnlen(bcc_ptr, bleft);
243 kfree(ses->serverOS);
245 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
247 strncpy(ses->serverOS, bcc_ptr, len);
248 if (strncmp(ses->serverOS, "OS/2", 4) == 0)
249 cifs_dbg(FYI, "OS/2 server\n");
255 len = strnlen(bcc_ptr, bleft);
259 kfree(ses->serverNOS);
261 ses->serverNOS = kzalloc(len + 1, GFP_KERNEL);
263 strncpy(ses->serverNOS, bcc_ptr, len);
268 len = strnlen(bcc_ptr, bleft);
272 /* No domain field in LANMAN case. Domain is
273 returned by old servers in the SMB negprot response */
274 /* BB For newer servers which do not support Unicode,
275 but thus do return domain here we could add parsing
276 for it later, but it is not very important */
277 cifs_dbg(FYI, "ascii: bytes left %d\n", bleft);
280 int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
281 struct cifs_ses *ses)
283 unsigned int tioffset; /* challenge message target info area */
284 unsigned int tilen; /* challenge message target info area length */
286 CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
288 if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
289 cifs_dbg(VFS, "challenge blob len %d too small\n", blob_len);
293 if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
294 cifs_dbg(VFS, "blob signature incorrect %s\n",
298 if (pblob->MessageType != NtLmChallenge) {
299 cifs_dbg(VFS, "Incorrect message type %d\n",
304 memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
305 /* BB we could decode pblob->NegotiateFlags; some may be useful */
306 /* In particular we can examine sign flags */
307 /* BB spec says that if AvId field of MsvAvTimestamp is populated then
308 we must set the MIC field of the AUTHENTICATE_MESSAGE */
309 ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags);
310 tioffset = le32_to_cpu(pblob->TargetInfoArray.BufferOffset);
311 tilen = le16_to_cpu(pblob->TargetInfoArray.Length);
312 if (tioffset > blob_len || tioffset + tilen > blob_len) {
313 cifs_dbg(VFS, "tioffset + tilen too high %u + %u",
318 ses->auth_key.response = kmemdup(bcc_ptr + tioffset, tilen,
320 if (!ses->auth_key.response) {
321 cifs_dbg(VFS, "Challenge target info alloc failure");
324 ses->auth_key.len = tilen;
330 /* BB Move to ntlmssp.c eventually */
332 /* We do not malloc the blob, it is passed in pbuffer, because
333 it is fixed size, and small, making this approach cleaner */
334 void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
335 struct cifs_ses *ses)
337 NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
340 memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
341 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
342 sec_blob->MessageType = NtLmNegotiate;
344 /* BB is NTLMV2 session security format easier to use here? */
345 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
346 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
347 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
348 NTLMSSP_NEGOTIATE_SEAL;
349 if (ses->server->sign)
350 flags |= NTLMSSP_NEGOTIATE_SIGN;
351 if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
352 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
354 sec_blob->NegotiateFlags = cpu_to_le32(flags);
356 sec_blob->WorkstationName.BufferOffset = 0;
357 sec_blob->WorkstationName.Length = 0;
358 sec_blob->WorkstationName.MaximumLength = 0;
360 /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
361 sec_blob->DomainName.BufferOffset = 0;
362 sec_blob->DomainName.Length = 0;
363 sec_blob->DomainName.MaximumLength = 0;
366 static int size_of_ntlmssp_blob(struct cifs_ses *ses)
368 int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len
369 - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2;
372 sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
377 sz += 2 * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
384 int build_ntlmssp_auth_blob(unsigned char **pbuffer,
386 struct cifs_ses *ses,
387 const struct nls_table *nls_cp)
390 AUTHENTICATE_MESSAGE *sec_blob;
394 rc = setup_ntlmv2_rsp(ses, nls_cp);
396 cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc);
398 goto setup_ntlmv2_ret;
400 *pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL);
403 cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
405 goto setup_ntlmv2_ret;
407 sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
409 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
410 sec_blob->MessageType = NtLmAuthenticate;
412 flags = NTLMSSP_NEGOTIATE_56 |
413 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
414 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
415 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
416 NTLMSSP_NEGOTIATE_SEAL;
417 if (ses->server->sign)
418 flags |= NTLMSSP_NEGOTIATE_SIGN;
419 if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
420 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
422 tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE);
423 sec_blob->NegotiateFlags = cpu_to_le32(flags);
425 sec_blob->LmChallengeResponse.BufferOffset =
426 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
427 sec_blob->LmChallengeResponse.Length = 0;
428 sec_blob->LmChallengeResponse.MaximumLength = 0;
430 sec_blob->NtChallengeResponse.BufferOffset =
431 cpu_to_le32(tmp - *pbuffer);
432 if (ses->user_name != NULL) {
433 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
434 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
435 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
437 sec_blob->NtChallengeResponse.Length =
438 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
439 sec_blob->NtChallengeResponse.MaximumLength =
440 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
443 * don't send an NT Response for anonymous access
445 sec_blob->NtChallengeResponse.Length = 0;
446 sec_blob->NtChallengeResponse.MaximumLength = 0;
449 if (ses->domainName == NULL) {
450 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
451 sec_blob->DomainName.Length = 0;
452 sec_blob->DomainName.MaximumLength = 0;
456 len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
457 CIFS_MAX_DOMAINNAME_LEN, nls_cp);
458 len *= 2; /* unicode is 2 bytes each */
459 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
460 sec_blob->DomainName.Length = cpu_to_le16(len);
461 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
465 if (ses->user_name == NULL) {
466 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
467 sec_blob->UserName.Length = 0;
468 sec_blob->UserName.MaximumLength = 0;
472 len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
473 CIFS_MAX_USERNAME_LEN, nls_cp);
474 len *= 2; /* unicode is 2 bytes each */
475 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
476 sec_blob->UserName.Length = cpu_to_le16(len);
477 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
481 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
482 sec_blob->WorkstationName.Length = 0;
483 sec_blob->WorkstationName.MaximumLength = 0;
486 if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
487 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
488 && !calc_seckey(ses)) {
489 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
490 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
491 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
492 sec_blob->SessionKey.MaximumLength =
493 cpu_to_le16(CIFS_CPHTXT_SIZE);
494 tmp += CIFS_CPHTXT_SIZE;
496 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
497 sec_blob->SessionKey.Length = 0;
498 sec_blob->SessionKey.MaximumLength = 0;
501 *buflen = tmp - *pbuffer;
507 cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
509 switch (server->negflavor) {
510 case CIFS_NEGFLAVOR_EXTENDED:
516 if (server->sec_ntlmssp &&
517 (global_secflags & CIFSSEC_MAY_NTLMSSP))
519 if ((server->sec_kerberos || server->sec_mskerberos) &&
520 (global_secflags & CIFSSEC_MAY_KRB5))
526 case CIFS_NEGFLAVOR_UNENCAP:
532 if (global_secflags & CIFSSEC_MAY_NTLMV2)
534 if (global_secflags & CIFSSEC_MAY_NTLM)
539 /* Fallthrough - to attempt LANMAN authentication next */
540 case CIFS_NEGFLAVOR_LANMAN:
545 if (global_secflags & CIFSSEC_MAY_LANMAN)
558 struct cifs_ses *ses;
559 struct nls_table *nls_cp;
560 void (*func)(struct sess_data *);
563 /* we will send the SMB in three pieces:
564 * a fixed length beginning part, an optional
565 * SPNEGO blob (which can be zero length), and a
566 * last part which will include the strings
567 * and rest of bcc area. This allows us to avoid
568 * a large buffer 17K allocation
575 sess_alloc_buffer(struct sess_data *sess_data, int wct)
578 struct cifs_ses *ses = sess_data->ses;
579 struct smb_hdr *smb_buf;
581 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
587 sess_data->iov[0].iov_base = (char *)smb_buf;
588 sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
590 * This variable will be used to clear the buffer
591 * allocated above in case of any error in the calling function.
593 sess_data->buf0_type = CIFS_SMALL_BUFFER;
595 /* 2000 big enough to fit max user, domain, NOS name etc. */
596 sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL);
597 if (!sess_data->iov[2].iov_base) {
599 goto out_free_smb_buf;
606 sess_data->iov[0].iov_base = NULL;
607 sess_data->iov[0].iov_len = 0;
608 sess_data->buf0_type = CIFS_NO_BUFFER;
613 sess_free_buffer(struct sess_data *sess_data)
616 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
617 sess_data->buf0_type = CIFS_NO_BUFFER;
618 kfree(sess_data->iov[2].iov_base);
622 sess_establish_session(struct sess_data *sess_data)
624 struct cifs_ses *ses = sess_data->ses;
626 mutex_lock(&ses->server->srv_mutex);
627 if (!ses->server->session_estab) {
628 if (ses->server->sign) {
629 ses->server->session_key.response =
630 kmemdup(ses->auth_key.response,
631 ses->auth_key.len, GFP_KERNEL);
632 if (!ses->server->session_key.response) {
633 mutex_unlock(&ses->server->srv_mutex);
636 ses->server->session_key.len =
639 ses->server->sequence_number = 0x2;
640 ses->server->session_estab = true;
642 mutex_unlock(&ses->server->srv_mutex);
644 cifs_dbg(FYI, "CIFS session established successfully\n");
645 spin_lock(&GlobalMid_Lock);
646 ses->status = CifsGood;
647 ses->need_reconnect = false;
648 spin_unlock(&GlobalMid_Lock);
654 sess_sendreceive(struct sess_data *sess_data)
657 struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base;
659 struct kvec rsp_iov = { NULL, 0 };
661 count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len;
662 smb_buf->smb_buf_length =
663 cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
664 put_bcc(count, smb_buf);
666 rc = SendReceive2(sess_data->xid, sess_data->ses,
667 sess_data->iov, 3 /* num_iovecs */,
668 &sess_data->buf0_type,
669 CIFS_LOG_ERROR, &rsp_iov);
670 cifs_small_buf_release(sess_data->iov[0].iov_base);
671 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
677 * LANMAN and plaintext are less secure and off by default.
678 * So we make this explicitly be turned on in kconfig (in the
679 * build) and turned on at runtime (changed from the default)
680 * in proc/fs/cifs or via mount parm. Unfortunately this is
681 * needed for old Win (e.g. Win95), some obscure NAS and OS/2
683 #ifdef CONFIG_CIFS_WEAK_PW_HASH
685 sess_auth_lanman(struct sess_data *sess_data)
688 struct smb_hdr *smb_buf;
689 SESSION_SETUP_ANDX *pSMB;
691 struct cifs_ses *ses = sess_data->ses;
692 char lnm_session_key[CIFS_AUTH_RESP_SIZE];
694 __u16 bytes_remaining;
696 /* lanman 2 style sessionsetup */
698 rc = sess_alloc_buffer(sess_data, 10);
702 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
703 bcc_ptr = sess_data->iov[2].iov_base;
704 capabilities = cifs_ssetup_hdr(ses, pSMB);
706 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
708 if (ses->user_name != NULL) {
709 /* no capabilities flags in old lanman negotiation */
710 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
712 /* Calculate hash with password and copy into bcc_ptr.
713 * Encryption Key (stored as in cryptkey) gets used if the
714 * security mode bit in Negottiate Protocol response states
715 * to use challenge/response method (i.e. Password bit is 1).
717 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
718 ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
719 true : false, lnm_session_key);
723 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
724 bcc_ptr += CIFS_AUTH_RESP_SIZE;
726 pSMB->old_req.PasswordLength = 0;
730 * can not sign if LANMAN negotiated so no need
731 * to calculate signing key? but what if server
732 * changed to do higher than lanman dialect and
733 * we reconnected would we ever calc signing_key?
736 cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n");
737 /* Unicode not allowed for LANMAN dialects */
738 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
740 sess_data->iov[2].iov_len = (long) bcc_ptr -
741 (long) sess_data->iov[2].iov_base;
743 rc = sess_sendreceive(sess_data);
747 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
748 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
750 /* lanman response has a word count of 3 */
751 if (smb_buf->WordCount != 3) {
753 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
757 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
758 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
760 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
761 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
763 bytes_remaining = get_bcc(smb_buf);
764 bcc_ptr = pByteArea(smb_buf);
766 /* BB check if Unicode and decode strings */
767 if (bytes_remaining == 0) {
768 /* no string area to decode, do nothing */
769 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
770 /* unicode string area must be word-aligned */
771 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
775 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
778 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
782 rc = sess_establish_session(sess_data);
784 sess_data->result = rc;
785 sess_data->func = NULL;
786 sess_free_buffer(sess_data);
792 sess_auth_ntlm(struct sess_data *sess_data)
795 struct smb_hdr *smb_buf;
796 SESSION_SETUP_ANDX *pSMB;
798 struct cifs_ses *ses = sess_data->ses;
800 __u16 bytes_remaining;
802 /* old style NTLM sessionsetup */
804 rc = sess_alloc_buffer(sess_data, 13);
808 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
809 bcc_ptr = sess_data->iov[2].iov_base;
810 capabilities = cifs_ssetup_hdr(ses, pSMB);
812 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
813 if (ses->user_name != NULL) {
814 pSMB->req_no_secext.CaseInsensitivePasswordLength =
815 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
816 pSMB->req_no_secext.CaseSensitivePasswordLength =
817 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
819 /* calculate ntlm response and session key */
820 rc = setup_ntlm_response(ses, sess_data->nls_cp);
822 cifs_dbg(VFS, "Error %d during NTLM authentication\n",
827 /* copy ntlm response */
828 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
829 CIFS_AUTH_RESP_SIZE);
830 bcc_ptr += CIFS_AUTH_RESP_SIZE;
831 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
832 CIFS_AUTH_RESP_SIZE);
833 bcc_ptr += CIFS_AUTH_RESP_SIZE;
835 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
836 pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
839 if (ses->capabilities & CAP_UNICODE) {
840 /* unicode strings must be word aligned */
841 if (sess_data->iov[0].iov_len % 2) {
845 unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
847 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
851 sess_data->iov[2].iov_len = (long) bcc_ptr -
852 (long) sess_data->iov[2].iov_base;
854 rc = sess_sendreceive(sess_data);
858 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
859 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
861 if (smb_buf->WordCount != 3) {
863 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
867 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
868 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
870 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
871 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
873 bytes_remaining = get_bcc(smb_buf);
874 bcc_ptr = pByteArea(smb_buf);
876 /* BB check if Unicode and decode strings */
877 if (bytes_remaining == 0) {
878 /* no string area to decode, do nothing */
879 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
880 /* unicode string area must be word-aligned */
881 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
885 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
888 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
892 rc = sess_establish_session(sess_data);
894 sess_data->result = rc;
895 sess_data->func = NULL;
896 sess_free_buffer(sess_data);
897 kfree(ses->auth_key.response);
898 ses->auth_key.response = NULL;
902 sess_auth_ntlmv2(struct sess_data *sess_data)
905 struct smb_hdr *smb_buf;
906 SESSION_SETUP_ANDX *pSMB;
908 struct cifs_ses *ses = sess_data->ses;
910 __u16 bytes_remaining;
912 /* old style NTLM sessionsetup */
914 rc = sess_alloc_buffer(sess_data, 13);
918 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
919 bcc_ptr = sess_data->iov[2].iov_base;
920 capabilities = cifs_ssetup_hdr(ses, pSMB);
922 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
924 /* LM2 password would be here if we supported it */
925 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
927 if (ses->user_name != NULL) {
928 /* calculate nlmv2 response and session key */
929 rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp);
931 cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc);
935 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
936 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
937 bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
939 /* set case sensitive password length after tilen may get
940 * assigned, tilen is 0 otherwise.
942 pSMB->req_no_secext.CaseSensitivePasswordLength =
943 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
945 pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
948 if (ses->capabilities & CAP_UNICODE) {
949 if (sess_data->iov[0].iov_len % 2) {
953 unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
955 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
959 sess_data->iov[2].iov_len = (long) bcc_ptr -
960 (long) sess_data->iov[2].iov_base;
962 rc = sess_sendreceive(sess_data);
966 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
967 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
969 if (smb_buf->WordCount != 3) {
971 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
975 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
976 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
978 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
979 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
981 bytes_remaining = get_bcc(smb_buf);
982 bcc_ptr = pByteArea(smb_buf);
984 /* BB check if Unicode and decode strings */
985 if (bytes_remaining == 0) {
986 /* no string area to decode, do nothing */
987 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
988 /* unicode string area must be word-aligned */
989 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
993 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
996 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
1000 rc = sess_establish_session(sess_data);
1002 sess_data->result = rc;
1003 sess_data->func = NULL;
1004 sess_free_buffer(sess_data);
1005 kfree(ses->auth_key.response);
1006 ses->auth_key.response = NULL;
1009 #ifdef CONFIG_CIFS_UPCALL
1011 sess_auth_kerberos(struct sess_data *sess_data)
1014 struct smb_hdr *smb_buf;
1015 SESSION_SETUP_ANDX *pSMB;
1017 struct cifs_ses *ses = sess_data->ses;
1019 __u16 bytes_remaining;
1020 struct key *spnego_key = NULL;
1021 struct cifs_spnego_msg *msg;
1024 /* extended security */
1026 rc = sess_alloc_buffer(sess_data, 12);
1030 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1031 bcc_ptr = sess_data->iov[2].iov_base;
1032 capabilities = cifs_ssetup_hdr(ses, pSMB);
1034 spnego_key = cifs_get_spnego_key(ses);
1035 if (IS_ERR(spnego_key)) {
1036 rc = PTR_ERR(spnego_key);
1041 msg = spnego_key->payload.data[0];
1043 * check version field to make sure that cifs.upcall is
1044 * sending us a response in an expected form
1046 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1048 "incorrect version of cifs.upcall (expected %d but got %d)",
1049 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1051 goto out_put_spnego_key;
1054 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1056 if (!ses->auth_key.response) {
1057 cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory",
1060 goto out_put_spnego_key;
1062 ses->auth_key.len = msg->sesskey_len;
1064 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
1065 capabilities |= CAP_EXTENDED_SECURITY;
1066 pSMB->req.Capabilities = cpu_to_le32(capabilities);
1067 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1068 sess_data->iov[1].iov_len = msg->secblob_len;
1069 pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len);
1071 if (ses->capabilities & CAP_UNICODE) {
1072 /* unicode strings must be word aligned */
1073 if ((sess_data->iov[0].iov_len
1074 + sess_data->iov[1].iov_len) % 2) {
1078 unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
1079 unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp);
1081 /* BB: is this right? */
1082 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
1085 sess_data->iov[2].iov_len = (long) bcc_ptr -
1086 (long) sess_data->iov[2].iov_base;
1088 rc = sess_sendreceive(sess_data);
1090 goto out_put_spnego_key;
1092 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1093 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1095 if (smb_buf->WordCount != 4) {
1097 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1098 goto out_put_spnego_key;
1101 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
1102 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
1104 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
1105 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
1107 bytes_remaining = get_bcc(smb_buf);
1108 bcc_ptr = pByteArea(smb_buf);
1110 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
1111 if (blob_len > bytes_remaining) {
1112 cifs_dbg(VFS, "bad security blob length %d\n",
1115 goto out_put_spnego_key;
1117 bcc_ptr += blob_len;
1118 bytes_remaining -= blob_len;
1120 /* BB check if Unicode and decode strings */
1121 if (bytes_remaining == 0) {
1122 /* no string area to decode, do nothing */
1123 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
1124 /* unicode string area must be word-aligned */
1125 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
1129 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
1132 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
1136 rc = sess_establish_session(sess_data);
1138 key_invalidate(spnego_key);
1139 key_put(spnego_key);
1141 sess_data->result = rc;
1142 sess_data->func = NULL;
1143 sess_free_buffer(sess_data);
1144 kfree(ses->auth_key.response);
1145 ses->auth_key.response = NULL;
1148 #endif /* ! CONFIG_CIFS_UPCALL */
1151 * The required kvec buffers have to be allocated before calling this
1155 _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data)
1157 SESSION_SETUP_ANDX *pSMB;
1158 struct cifs_ses *ses = sess_data->ses;
1162 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1164 capabilities = cifs_ssetup_hdr(ses, pSMB);
1165 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
1166 cifs_dbg(VFS, "NTLMSSP requires Unicode support\n");
1170 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
1171 capabilities |= CAP_EXTENDED_SECURITY;
1172 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
1174 bcc_ptr = sess_data->iov[2].iov_base;
1175 /* unicode strings must be word aligned */
1176 if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) {
1180 unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
1182 sess_data->iov[2].iov_len = (long) bcc_ptr -
1183 (long) sess_data->iov[2].iov_base;
1189 sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data);
1192 sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data)
1195 struct smb_hdr *smb_buf;
1196 SESSION_SETUP_ANDX *pSMB;
1197 struct cifs_ses *ses = sess_data->ses;
1198 __u16 bytes_remaining;
1202 cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n");
1205 * if memory allocation is successful, caller of this function
1208 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1209 if (!ses->ntlmssp) {
1213 ses->ntlmssp->sesskey_per_smbsess = false;
1216 rc = sess_alloc_buffer(sess_data, 12);
1220 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1222 /* Build security blob before we assemble the request */
1223 build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses);
1224 sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
1225 sess_data->iov[1].iov_base = pSMB->req.SecurityBlob;
1226 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
1228 rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
1232 rc = sess_sendreceive(sess_data);
1234 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1235 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1237 /* If true, rc here is expected and not an error */
1238 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1239 smb_buf->Status.CifsError ==
1240 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
1246 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1248 if (smb_buf->WordCount != 4) {
1250 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1254 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
1255 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
1257 bytes_remaining = get_bcc(smb_buf);
1258 bcc_ptr = pByteArea(smb_buf);
1260 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
1261 if (blob_len > bytes_remaining) {
1262 cifs_dbg(VFS, "bad security blob length %d\n",
1268 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
1270 sess_free_buffer(sess_data);
1273 sess_data->func = sess_auth_rawntlmssp_authenticate;
1277 /* Else error. Cleanup */
1278 kfree(ses->auth_key.response);
1279 ses->auth_key.response = NULL;
1280 kfree(ses->ntlmssp);
1281 ses->ntlmssp = NULL;
1283 sess_data->func = NULL;
1284 sess_data->result = rc;
1288 sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data)
1291 struct smb_hdr *smb_buf;
1292 SESSION_SETUP_ANDX *pSMB;
1293 struct cifs_ses *ses = sess_data->ses;
1294 __u16 bytes_remaining;
1296 unsigned char *ntlmsspblob = NULL;
1299 cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n");
1302 rc = sess_alloc_buffer(sess_data, 12);
1306 /* Build security blob before we assemble the request */
1307 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1308 smb_buf = (struct smb_hdr *)pSMB;
1309 rc = build_ntlmssp_auth_blob(&ntlmsspblob,
1310 &blob_len, ses, sess_data->nls_cp);
1312 goto out_free_ntlmsspblob;
1313 sess_data->iov[1].iov_len = blob_len;
1314 sess_data->iov[1].iov_base = ntlmsspblob;
1315 pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
1317 * Make sure that we tell the server that we are using
1318 * the uid that it just gave us back on the response
1321 smb_buf->Uid = ses->Suid;
1323 rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
1325 goto out_free_ntlmsspblob;
1327 rc = sess_sendreceive(sess_data);
1329 goto out_free_ntlmsspblob;
1331 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1332 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1333 if (smb_buf->WordCount != 4) {
1335 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1336 goto out_free_ntlmsspblob;
1339 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
1340 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
1342 if (ses->Suid != smb_buf->Uid) {
1343 ses->Suid = smb_buf->Uid;
1344 cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid);
1347 bytes_remaining = get_bcc(smb_buf);
1348 bcc_ptr = pByteArea(smb_buf);
1349 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
1350 if (blob_len > bytes_remaining) {
1351 cifs_dbg(VFS, "bad security blob length %d\n",
1354 goto out_free_ntlmsspblob;
1356 bcc_ptr += blob_len;
1357 bytes_remaining -= blob_len;
1360 /* BB check if Unicode and decode strings */
1361 if (bytes_remaining == 0) {
1362 /* no string area to decode, do nothing */
1363 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
1364 /* unicode string area must be word-aligned */
1365 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
1369 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
1372 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
1376 out_free_ntlmsspblob:
1379 sess_free_buffer(sess_data);
1382 rc = sess_establish_session(sess_data);
1385 kfree(ses->auth_key.response);
1386 ses->auth_key.response = NULL;
1387 kfree(ses->ntlmssp);
1388 ses->ntlmssp = NULL;
1390 sess_data->func = NULL;
1391 sess_data->result = rc;
1394 static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data)
1398 type = cifs_select_sectype(ses->server, ses->sectype);
1399 cifs_dbg(FYI, "sess setup type %d\n", type);
1400 if (type == Unspecified) {
1402 "Unable to select appropriate authentication method!");
1408 /* LANMAN and plaintext are less secure and off by default.
1409 * So we make this explicitly be turned on in kconfig (in the
1410 * build) and turned on at runtime (changed from the default)
1411 * in proc/fs/cifs or via mount parm. Unfortunately this is
1412 * needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
1413 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1414 sess_data->func = sess_auth_lanman;
1420 sess_data->func = sess_auth_ntlm;
1423 sess_data->func = sess_auth_ntlmv2;
1426 #ifdef CONFIG_CIFS_UPCALL
1427 sess_data->func = sess_auth_kerberos;
1430 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1433 #endif /* CONFIG_CIFS_UPCALL */
1435 sess_data->func = sess_auth_rawntlmssp_negotiate;
1438 cifs_dbg(VFS, "secType %d not supported!\n", type);
1445 int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
1446 const struct nls_table *nls_cp)
1449 struct sess_data *sess_data;
1452 WARN(1, "%s: ses == NULL!", __func__);
1456 sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL);
1460 rc = select_sec(ses, sess_data);
1464 sess_data->xid = xid;
1465 sess_data->ses = ses;
1466 sess_data->buf0_type = CIFS_NO_BUFFER;
1467 sess_data->nls_cp = (struct nls_table *) nls_cp;
1469 while (sess_data->func)
1470 sess_data->func(sess_data);
1472 /* Store result before we free sess_data */
1473 rc = sess_data->result;