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"
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);
401 sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
403 memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
404 sec_blob->MessageType = NtLmAuthenticate;
406 flags = NTLMSSP_NEGOTIATE_56 |
407 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
408 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
409 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
410 NTLMSSP_NEGOTIATE_SEAL;
411 if (ses->server->sign)
412 flags |= NTLMSSP_NEGOTIATE_SIGN;
413 if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
414 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
416 tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE);
417 sec_blob->NegotiateFlags = cpu_to_le32(flags);
419 sec_blob->LmChallengeResponse.BufferOffset =
420 cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
421 sec_blob->LmChallengeResponse.Length = 0;
422 sec_blob->LmChallengeResponse.MaximumLength = 0;
424 sec_blob->NtChallengeResponse.BufferOffset =
425 cpu_to_le32(tmp - *pbuffer);
426 if (ses->user_name != NULL) {
427 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
428 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
429 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
431 sec_blob->NtChallengeResponse.Length =
432 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
433 sec_blob->NtChallengeResponse.MaximumLength =
434 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
437 * don't send an NT Response for anonymous access
439 sec_blob->NtChallengeResponse.Length = 0;
440 sec_blob->NtChallengeResponse.MaximumLength = 0;
443 if (ses->domainName == NULL) {
444 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
445 sec_blob->DomainName.Length = 0;
446 sec_blob->DomainName.MaximumLength = 0;
450 len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
451 CIFS_MAX_DOMAINNAME_LEN, nls_cp);
452 len *= 2; /* unicode is 2 bytes each */
453 sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
454 sec_blob->DomainName.Length = cpu_to_le16(len);
455 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
459 if (ses->user_name == NULL) {
460 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
461 sec_blob->UserName.Length = 0;
462 sec_blob->UserName.MaximumLength = 0;
466 len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
467 CIFS_MAX_USERNAME_LEN, nls_cp);
468 len *= 2; /* unicode is 2 bytes each */
469 sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
470 sec_blob->UserName.Length = cpu_to_le16(len);
471 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
475 sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
476 sec_blob->WorkstationName.Length = 0;
477 sec_blob->WorkstationName.MaximumLength = 0;
480 if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
481 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
482 && !calc_seckey(ses)) {
483 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
484 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
485 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
486 sec_blob->SessionKey.MaximumLength =
487 cpu_to_le16(CIFS_CPHTXT_SIZE);
488 tmp += CIFS_CPHTXT_SIZE;
490 sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
491 sec_blob->SessionKey.Length = 0;
492 sec_blob->SessionKey.MaximumLength = 0;
495 *buflen = tmp - *pbuffer;
501 cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
503 switch (server->negflavor) {
504 case CIFS_NEGFLAVOR_EXTENDED:
510 if (server->sec_ntlmssp &&
511 (global_secflags & CIFSSEC_MAY_NTLMSSP))
513 if ((server->sec_kerberos || server->sec_mskerberos) &&
514 (global_secflags & CIFSSEC_MAY_KRB5))
520 case CIFS_NEGFLAVOR_UNENCAP:
526 if (global_secflags & CIFSSEC_MAY_NTLMV2)
528 if (global_secflags & CIFSSEC_MAY_NTLM)
531 /* Fallthrough to attempt LANMAN authentication next */
534 case CIFS_NEGFLAVOR_LANMAN:
539 if (global_secflags & CIFSSEC_MAY_LANMAN)
552 struct cifs_ses *ses;
553 struct nls_table *nls_cp;
554 void (*func)(struct sess_data *);
557 /* we will send the SMB in three pieces:
558 * a fixed length beginning part, an optional
559 * SPNEGO blob (which can be zero length), and a
560 * last part which will include the strings
561 * and rest of bcc area. This allows us to avoid
562 * a large buffer 17K allocation
569 sess_alloc_buffer(struct sess_data *sess_data, int wct)
572 struct cifs_ses *ses = sess_data->ses;
573 struct smb_hdr *smb_buf;
575 rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
581 sess_data->iov[0].iov_base = (char *)smb_buf;
582 sess_data->iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
584 * This variable will be used to clear the buffer
585 * allocated above in case of any error in the calling function.
587 sess_data->buf0_type = CIFS_SMALL_BUFFER;
589 /* 2000 big enough to fit max user, domain, NOS name etc. */
590 sess_data->iov[2].iov_base = kmalloc(2000, GFP_KERNEL);
591 if (!sess_data->iov[2].iov_base) {
593 goto out_free_smb_buf;
600 sess_data->iov[0].iov_base = NULL;
601 sess_data->iov[0].iov_len = 0;
602 sess_data->buf0_type = CIFS_NO_BUFFER;
607 sess_free_buffer(struct sess_data *sess_data)
610 free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
611 sess_data->buf0_type = CIFS_NO_BUFFER;
612 kfree(sess_data->iov[2].iov_base);
616 sess_establish_session(struct sess_data *sess_data)
618 struct cifs_ses *ses = sess_data->ses;
620 mutex_lock(&ses->server->srv_mutex);
621 if (!ses->server->session_estab) {
622 if (ses->server->sign) {
623 ses->server->session_key.response =
624 kmemdup(ses->auth_key.response,
625 ses->auth_key.len, GFP_KERNEL);
626 if (!ses->server->session_key.response) {
627 mutex_unlock(&ses->server->srv_mutex);
630 ses->server->session_key.len =
633 ses->server->sequence_number = 0x2;
634 ses->server->session_estab = true;
636 mutex_unlock(&ses->server->srv_mutex);
638 cifs_dbg(FYI, "CIFS session established successfully\n");
639 spin_lock(&GlobalMid_Lock);
640 ses->status = CifsGood;
641 ses->need_reconnect = false;
642 spin_unlock(&GlobalMid_Lock);
648 sess_sendreceive(struct sess_data *sess_data)
651 struct smb_hdr *smb_buf = (struct smb_hdr *) sess_data->iov[0].iov_base;
653 struct kvec rsp_iov = { NULL, 0 };
655 count = sess_data->iov[1].iov_len + sess_data->iov[2].iov_len;
656 smb_buf->smb_buf_length =
657 cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
658 put_bcc(count, smb_buf);
660 rc = SendReceive2(sess_data->xid, sess_data->ses,
661 sess_data->iov, 3 /* num_iovecs */,
662 &sess_data->buf0_type,
663 CIFS_LOG_ERROR, &rsp_iov);
664 cifs_small_buf_release(sess_data->iov[0].iov_base);
665 memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
671 * LANMAN and plaintext are less secure and off by default.
672 * So we make this explicitly be turned on in kconfig (in the
673 * build) and turned on at runtime (changed from the default)
674 * in proc/fs/cifs or via mount parm. Unfortunately this is
675 * needed for old Win (e.g. Win95), some obscure NAS and OS/2
677 #ifdef CONFIG_CIFS_WEAK_PW_HASH
679 sess_auth_lanman(struct sess_data *sess_data)
682 struct smb_hdr *smb_buf;
683 SESSION_SETUP_ANDX *pSMB;
685 struct cifs_ses *ses = sess_data->ses;
686 char lnm_session_key[CIFS_AUTH_RESP_SIZE];
688 __u16 bytes_remaining;
690 /* lanman 2 style sessionsetup */
692 rc = sess_alloc_buffer(sess_data, 10);
696 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
697 bcc_ptr = sess_data->iov[2].iov_base;
698 capabilities = cifs_ssetup_hdr(ses, pSMB);
700 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
702 if (ses->user_name != NULL) {
703 /* no capabilities flags in old lanman negotiation */
704 pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
706 /* Calculate hash with password and copy into bcc_ptr.
707 * Encryption Key (stored as in cryptkey) gets used if the
708 * security mode bit in Negottiate Protocol response states
709 * to use challenge/response method (i.e. Password bit is 1).
711 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
712 ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
713 true : false, lnm_session_key);
717 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
718 bcc_ptr += CIFS_AUTH_RESP_SIZE;
720 pSMB->old_req.PasswordLength = 0;
724 * can not sign if LANMAN negotiated so no need
725 * to calculate signing key? but what if server
726 * changed to do higher than lanman dialect and
727 * we reconnected would we ever calc signing_key?
730 cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n");
731 /* Unicode not allowed for LANMAN dialects */
732 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
734 sess_data->iov[2].iov_len = (long) bcc_ptr -
735 (long) sess_data->iov[2].iov_base;
737 rc = sess_sendreceive(sess_data);
741 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
742 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
744 /* lanman response has a word count of 3 */
745 if (smb_buf->WordCount != 3) {
747 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
751 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
752 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
754 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
755 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
757 bytes_remaining = get_bcc(smb_buf);
758 bcc_ptr = pByteArea(smb_buf);
760 /* BB check if Unicode and decode strings */
761 if (bytes_remaining == 0) {
762 /* no string area to decode, do nothing */
763 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
764 /* unicode string area must be word-aligned */
765 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
769 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
772 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
776 rc = sess_establish_session(sess_data);
778 sess_data->result = rc;
779 sess_data->func = NULL;
780 sess_free_buffer(sess_data);
786 sess_auth_ntlm(struct sess_data *sess_data)
789 struct smb_hdr *smb_buf;
790 SESSION_SETUP_ANDX *pSMB;
792 struct cifs_ses *ses = sess_data->ses;
794 __u16 bytes_remaining;
796 /* old style NTLM sessionsetup */
798 rc = sess_alloc_buffer(sess_data, 13);
802 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
803 bcc_ptr = sess_data->iov[2].iov_base;
804 capabilities = cifs_ssetup_hdr(ses, pSMB);
806 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
807 if (ses->user_name != NULL) {
808 pSMB->req_no_secext.CaseInsensitivePasswordLength =
809 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
810 pSMB->req_no_secext.CaseSensitivePasswordLength =
811 cpu_to_le16(CIFS_AUTH_RESP_SIZE);
813 /* calculate ntlm response and session key */
814 rc = setup_ntlm_response(ses, sess_data->nls_cp);
816 cifs_dbg(VFS, "Error %d during NTLM authentication\n",
821 /* copy ntlm response */
822 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
823 CIFS_AUTH_RESP_SIZE);
824 bcc_ptr += CIFS_AUTH_RESP_SIZE;
825 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
826 CIFS_AUTH_RESP_SIZE);
827 bcc_ptr += CIFS_AUTH_RESP_SIZE;
829 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
830 pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
833 if (ses->capabilities & CAP_UNICODE) {
834 /* unicode strings must be word aligned */
835 if (sess_data->iov[0].iov_len % 2) {
839 unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
841 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
845 sess_data->iov[2].iov_len = (long) bcc_ptr -
846 (long) sess_data->iov[2].iov_base;
848 rc = sess_sendreceive(sess_data);
852 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
853 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
855 if (smb_buf->WordCount != 3) {
857 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
861 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
862 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
864 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
865 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
867 bytes_remaining = get_bcc(smb_buf);
868 bcc_ptr = pByteArea(smb_buf);
870 /* BB check if Unicode and decode strings */
871 if (bytes_remaining == 0) {
872 /* no string area to decode, do nothing */
873 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
874 /* unicode string area must be word-aligned */
875 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
879 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
882 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
886 rc = sess_establish_session(sess_data);
888 sess_data->result = rc;
889 sess_data->func = NULL;
890 sess_free_buffer(sess_data);
891 kfree(ses->auth_key.response);
892 ses->auth_key.response = NULL;
896 sess_auth_ntlmv2(struct sess_data *sess_data)
899 struct smb_hdr *smb_buf;
900 SESSION_SETUP_ANDX *pSMB;
902 struct cifs_ses *ses = sess_data->ses;
904 __u16 bytes_remaining;
906 /* old style NTLM sessionsetup */
908 rc = sess_alloc_buffer(sess_data, 13);
912 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
913 bcc_ptr = sess_data->iov[2].iov_base;
914 capabilities = cifs_ssetup_hdr(ses, pSMB);
916 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
918 /* LM2 password would be here if we supported it */
919 pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
921 if (ses->user_name != NULL) {
922 /* calculate nlmv2 response and session key */
923 rc = setup_ntlmv2_rsp(ses, sess_data->nls_cp);
925 cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n", rc);
929 memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
930 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
931 bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
933 /* set case sensitive password length after tilen may get
934 * assigned, tilen is 0 otherwise.
936 pSMB->req_no_secext.CaseSensitivePasswordLength =
937 cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
939 pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
942 if (ses->capabilities & CAP_UNICODE) {
943 if (sess_data->iov[0].iov_len % 2) {
947 unicode_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
949 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
953 sess_data->iov[2].iov_len = (long) bcc_ptr -
954 (long) sess_data->iov[2].iov_base;
956 rc = sess_sendreceive(sess_data);
960 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
961 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
963 if (smb_buf->WordCount != 3) {
965 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
969 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
970 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
972 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
973 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
975 bytes_remaining = get_bcc(smb_buf);
976 bcc_ptr = pByteArea(smb_buf);
978 /* BB check if Unicode and decode strings */
979 if (bytes_remaining == 0) {
980 /* no string area to decode, do nothing */
981 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
982 /* unicode string area must be word-aligned */
983 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
987 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
990 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
994 rc = sess_establish_session(sess_data);
996 sess_data->result = rc;
997 sess_data->func = NULL;
998 sess_free_buffer(sess_data);
999 kfree(ses->auth_key.response);
1000 ses->auth_key.response = NULL;
1003 #ifdef CONFIG_CIFS_UPCALL
1005 sess_auth_kerberos(struct sess_data *sess_data)
1008 struct smb_hdr *smb_buf;
1009 SESSION_SETUP_ANDX *pSMB;
1011 struct cifs_ses *ses = sess_data->ses;
1013 __u16 bytes_remaining;
1014 struct key *spnego_key = NULL;
1015 struct cifs_spnego_msg *msg;
1018 /* extended security */
1020 rc = sess_alloc_buffer(sess_data, 12);
1024 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1025 bcc_ptr = sess_data->iov[2].iov_base;
1026 capabilities = cifs_ssetup_hdr(ses, pSMB);
1028 spnego_key = cifs_get_spnego_key(ses);
1029 if (IS_ERR(spnego_key)) {
1030 rc = PTR_ERR(spnego_key);
1035 msg = spnego_key->payload.data[0];
1037 * check version field to make sure that cifs.upcall is
1038 * sending us a response in an expected form
1040 if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
1042 "incorrect version of cifs.upcall (expected %d but got %d)",
1043 CIFS_SPNEGO_UPCALL_VERSION, msg->version);
1045 goto out_put_spnego_key;
1048 ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
1050 if (!ses->auth_key.response) {
1051 cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory",
1054 goto out_put_spnego_key;
1056 ses->auth_key.len = msg->sesskey_len;
1058 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
1059 capabilities |= CAP_EXTENDED_SECURITY;
1060 pSMB->req.Capabilities = cpu_to_le32(capabilities);
1061 sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
1062 sess_data->iov[1].iov_len = msg->secblob_len;
1063 pSMB->req.SecurityBlobLength = cpu_to_le16(sess_data->iov[1].iov_len);
1065 if (ses->capabilities & CAP_UNICODE) {
1066 /* unicode strings must be word aligned */
1067 if ((sess_data->iov[0].iov_len
1068 + sess_data->iov[1].iov_len) % 2) {
1072 unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
1073 unicode_domain_string(&bcc_ptr, ses, sess_data->nls_cp);
1075 /* BB: is this right? */
1076 ascii_ssetup_strings(&bcc_ptr, ses, sess_data->nls_cp);
1079 sess_data->iov[2].iov_len = (long) bcc_ptr -
1080 (long) sess_data->iov[2].iov_base;
1082 rc = sess_sendreceive(sess_data);
1084 goto out_put_spnego_key;
1086 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1087 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1089 if (smb_buf->WordCount != 4) {
1091 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1092 goto out_put_spnego_key;
1095 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
1096 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
1098 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
1099 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
1101 bytes_remaining = get_bcc(smb_buf);
1102 bcc_ptr = pByteArea(smb_buf);
1104 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
1105 if (blob_len > bytes_remaining) {
1106 cifs_dbg(VFS, "bad security blob length %d\n",
1109 goto out_put_spnego_key;
1111 bcc_ptr += blob_len;
1112 bytes_remaining -= blob_len;
1114 /* BB check if Unicode and decode strings */
1115 if (bytes_remaining == 0) {
1116 /* no string area to decode, do nothing */
1117 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
1118 /* unicode string area must be word-aligned */
1119 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
1123 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
1126 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
1130 rc = sess_establish_session(sess_data);
1132 key_invalidate(spnego_key);
1133 key_put(spnego_key);
1135 sess_data->result = rc;
1136 sess_data->func = NULL;
1137 sess_free_buffer(sess_data);
1138 kfree(ses->auth_key.response);
1139 ses->auth_key.response = NULL;
1142 #endif /* ! CONFIG_CIFS_UPCALL */
1145 * The required kvec buffers have to be allocated before calling this
1149 _sess_auth_rawntlmssp_assemble_req(struct sess_data *sess_data)
1151 struct smb_hdr *smb_buf;
1152 SESSION_SETUP_ANDX *pSMB;
1153 struct cifs_ses *ses = sess_data->ses;
1157 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1158 smb_buf = (struct smb_hdr *)pSMB;
1160 capabilities = cifs_ssetup_hdr(ses, pSMB);
1161 if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
1162 cifs_dbg(VFS, "NTLMSSP requires Unicode support\n");
1166 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
1167 capabilities |= CAP_EXTENDED_SECURITY;
1168 pSMB->req.Capabilities |= cpu_to_le32(capabilities);
1170 bcc_ptr = sess_data->iov[2].iov_base;
1171 /* unicode strings must be word aligned */
1172 if ((sess_data->iov[0].iov_len + sess_data->iov[1].iov_len) % 2) {
1176 unicode_oslm_strings(&bcc_ptr, sess_data->nls_cp);
1178 sess_data->iov[2].iov_len = (long) bcc_ptr -
1179 (long) sess_data->iov[2].iov_base;
1185 sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data);
1188 sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data)
1191 struct smb_hdr *smb_buf;
1192 SESSION_SETUP_ANDX *pSMB;
1193 struct cifs_ses *ses = sess_data->ses;
1194 __u16 bytes_remaining;
1198 cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n");
1201 * if memory allocation is successful, caller of this function
1204 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
1205 if (!ses->ntlmssp) {
1209 ses->ntlmssp->sesskey_per_smbsess = false;
1212 rc = sess_alloc_buffer(sess_data, 12);
1216 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1218 /* Build security blob before we assemble the request */
1219 build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses);
1220 sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
1221 sess_data->iov[1].iov_base = pSMB->req.SecurityBlob;
1222 pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
1224 rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
1228 rc = sess_sendreceive(sess_data);
1230 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1231 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1233 /* If true, rc here is expected and not an error */
1234 if (sess_data->buf0_type != CIFS_NO_BUFFER &&
1235 smb_buf->Status.CifsError ==
1236 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
1242 cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
1244 if (smb_buf->WordCount != 4) {
1246 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1250 ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
1251 cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
1253 bytes_remaining = get_bcc(smb_buf);
1254 bcc_ptr = pByteArea(smb_buf);
1256 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
1257 if (blob_len > bytes_remaining) {
1258 cifs_dbg(VFS, "bad security blob length %d\n",
1264 rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
1266 sess_free_buffer(sess_data);
1269 sess_data->func = sess_auth_rawntlmssp_authenticate;
1273 /* Else error. Cleanup */
1274 kfree(ses->auth_key.response);
1275 ses->auth_key.response = NULL;
1276 kfree(ses->ntlmssp);
1277 ses->ntlmssp = NULL;
1279 sess_data->func = NULL;
1280 sess_data->result = rc;
1284 sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data)
1287 struct smb_hdr *smb_buf;
1288 SESSION_SETUP_ANDX *pSMB;
1289 struct cifs_ses *ses = sess_data->ses;
1290 __u16 bytes_remaining;
1292 unsigned char *ntlmsspblob = NULL;
1295 cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n");
1298 rc = sess_alloc_buffer(sess_data, 12);
1302 /* Build security blob before we assemble the request */
1303 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1304 smb_buf = (struct smb_hdr *)pSMB;
1305 rc = build_ntlmssp_auth_blob(&ntlmsspblob,
1306 &blob_len, ses, sess_data->nls_cp);
1308 goto out_free_ntlmsspblob;
1309 sess_data->iov[1].iov_len = blob_len;
1310 sess_data->iov[1].iov_base = ntlmsspblob;
1311 pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
1313 * Make sure that we tell the server that we are using
1314 * the uid that it just gave us back on the response
1317 smb_buf->Uid = ses->Suid;
1319 rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
1321 goto out_free_ntlmsspblob;
1323 rc = sess_sendreceive(sess_data);
1325 goto out_free_ntlmsspblob;
1327 pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
1328 smb_buf = (struct smb_hdr *)sess_data->iov[0].iov_base;
1329 if (smb_buf->WordCount != 4) {
1331 cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
1332 goto out_free_ntlmsspblob;
1335 if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
1336 cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
1338 if (ses->Suid != smb_buf->Uid) {
1339 ses->Suid = smb_buf->Uid;
1340 cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid);
1343 bytes_remaining = get_bcc(smb_buf);
1344 bcc_ptr = pByteArea(smb_buf);
1345 blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
1346 if (blob_len > bytes_remaining) {
1347 cifs_dbg(VFS, "bad security blob length %d\n",
1350 goto out_free_ntlmsspblob;
1352 bcc_ptr += blob_len;
1353 bytes_remaining -= blob_len;
1356 /* BB check if Unicode and decode strings */
1357 if (bytes_remaining == 0) {
1358 /* no string area to decode, do nothing */
1359 } else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
1360 /* unicode string area must be word-aligned */
1361 if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
1365 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses,
1368 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses,
1372 out_free_ntlmsspblob:
1375 sess_free_buffer(sess_data);
1378 rc = sess_establish_session(sess_data);
1381 kfree(ses->auth_key.response);
1382 ses->auth_key.response = NULL;
1383 kfree(ses->ntlmssp);
1384 ses->ntlmssp = NULL;
1386 sess_data->func = NULL;
1387 sess_data->result = rc;
1390 static int select_sec(struct cifs_ses *ses, struct sess_data *sess_data)
1394 type = cifs_select_sectype(ses->server, ses->sectype);
1395 cifs_dbg(FYI, "sess setup type %d\n", type);
1396 if (type == Unspecified) {
1398 "Unable to select appropriate authentication method!");
1404 /* LANMAN and plaintext are less secure and off by default.
1405 * So we make this explicitly be turned on in kconfig (in the
1406 * build) and turned on at runtime (changed from the default)
1407 * in proc/fs/cifs or via mount parm. Unfortunately this is
1408 * needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
1409 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1410 sess_data->func = sess_auth_lanman;
1416 sess_data->func = sess_auth_ntlm;
1419 sess_data->func = sess_auth_ntlmv2;
1422 #ifdef CONFIG_CIFS_UPCALL
1423 sess_data->func = sess_auth_kerberos;
1426 cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
1429 #endif /* CONFIG_CIFS_UPCALL */
1431 sess_data->func = sess_auth_rawntlmssp_negotiate;
1434 cifs_dbg(VFS, "secType %d not supported!\n", type);
1441 int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
1442 const struct nls_table *nls_cp)
1445 struct sess_data *sess_data;
1448 WARN(1, "%s: ses == NULL!", __func__);
1452 sess_data = kzalloc(sizeof(struct sess_data), GFP_KERNEL);
1456 rc = select_sec(ses, sess_data);
1460 sess_data->xid = xid;
1461 sess_data->ses = ses;
1462 sess_data->buf0_type = CIFS_NO_BUFFER;
1463 sess_data->nls_cp = (struct nls_table *) nls_cp;
1465 while (sess_data->func)
1466 sess_data->func(sess_data);
1468 /* Store result before we free sess_data */
1469 rc = sess_data->result;