1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2017 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*
27 * Notes on the virtual circuit (VC) values in the SMB Negotiate
28 * response and SessionSetupAndx request.
29 *
30 * A virtual circuit (VC) represents a connection between a client and a
31 * server using a reliable, session oriented transport protocol, such as
32 * NetBIOS or TCP/IP. Originally, each SMB session was restricted to a
33 * single underlying transport connection, i.e. a single NetBIOS session,
34 * which limited performance for raw data transfers.
35 *
36 * The intention behind multiple VCs was to improve performance by
37 * allowing parallelism over each NetBIOS session. For example, raw data
38 * could be transmitted using a different VC from other types of SMB
39 * requests to remove the interleaving restriction while a raw transfer
40 * is in progress. So the MaxNumberVcs field was added to the negotiate
41 * response to make the number of VCs configurable and to allow servers
42 * to specify how many they were prepared to support per session
43 * connection. This turned out to be difficult to manage and, with
44 * technology improvements, it has become obsolete.
45 *
46 * Servers should set the MaxNumberVcs value in the Negotiate response
47 * to 1. Clients should probably ignore it. If a server receives a
48 * SessionSetupAndx with a VC value of 0, it should close all other
49 * VCs to that client. If it receives a non-zero VC, it should leave
50 * other VCs in tact.
51 *
52 */
53
54 /*
55 * SMB: negotiate
56 *
57 * Client Request Description
58 * ============================ =======================================
59 *
60 * UCHAR WordCount; Count of parameter words = 0
61 * USHORT ByteCount; Count of data bytes; min = 2
62 * struct {
63 * UCHAR BufferFormat; 0x02 -- Dialect
64 * UCHAR DialectName[]; ASCII null-terminated string
65 * } Dialects[];
66 *
67 * The Client sends a list of dialects that it can communicate with. The
68 * response is a selection of one of those dialects (numbered 0 through n)
69 * or -1 (hex FFFF) indicating that none of the dialects were acceptable.
70 * The negotiate message is binding on the virtual circuit and must be
71 * sent. One and only one negotiate message may be sent, subsequent
72 * negotiate requests will be rejected with an error response and no action
73 * will be taken.
74 *
75 * The protocol does not impose any particular structure to the dialect
76 * strings. Implementors of particular protocols may choose to include,
77 * for example, version numbers in the string.
78 *
79 * If the server does not understand any of the dialect strings, or if PC
80 * NETWORK PROGRAM 1.0 is the chosen dialect, the response format is
81 *
82 * Server Response Description
83 * ============================ =======================================
84 *
85 * UCHAR WordCount; Count of parameter words = 1
86 * USHORT DialectIndex; Index of selected dialect
87 * USHORT ByteCount; Count of data bytes = 0
88 *
89 * If the chosen dialect is greater than core up to and including
90 * LANMAN2.1, the protocol response format is
91 *
92 * Server Response Description
93 * ============================ =======================================
94 *
95 * UCHAR WordCount; Count of parameter words = 13
96 * USHORT DialectIndex; Index of selected dialect
97 * USHORT SecurityMode; Security mode:
98 * bit 0: 0 = share, 1 = user
99 * bit 1: 1 = use challenge/response
100 * authentication
101 * USHORT MaxBufferSize; Max transmit buffer size (>= 1024)
102 * USHORT MaxMpxCount; Max pending multiplexed requests
103 * USHORT MaxNumberVcs; Max VCs between client and server
104 * USHORT RawMode; Raw modes supported:
105 * bit 0: 1 = Read Raw supported
106 * bit 1: 1 = Write Raw supported
107 * ULONG SessionKey; Unique token identifying this session
108 * SMB_TIME ServerTime; Current time at server
109 * SMB_DATE ServerDate; Current date at server
110 * USHORT ServerTimeZone; Current time zone at server
111 * USHORT EncryptionKeyLength; MBZ if this is not LM2.1
112 * USHORT Reserved; MBZ
113 * USHORT ByteCount Count of data bytes
114 * UCHAR EncryptionKey[]; The challenge encryption key
115 * STRING PrimaryDomain[]; The server's primary domain
116 *
117 * MaxBufferSize is the size of the largest message which the client can
118 * legitimately send to the server
119 *
120 * If bit0 of the Flags field is set in the negotiate response, this
121 * indicates the server supports the SMB_COM_LOCK_AND_READ and
122 * SMB_COM_WRITE_AND_UNLOCK client requests.
123 *
124 * If the SecurityMode field indicates the server is running in user mode,
125 * the client must send appropriate SMB_COM_SESSION_SETUP_ANDX requests
126 * before the server will allow the client to access resources. If the
127 * SecurityMode fields indicates the client should use challenge/response
128 * authentication, the client should use the authentication mechanism
129 * specified in section 2.10.
130 *
131 * Clients should submit no more than MaxMpxCount distinct unanswered SMBs
132 * to the server when using multiplexed reads or writes (see sections 5.13
133 * and 5.25)
134 *
135 * Clients using the "MICROSOFT NETWORKS 1.03" dialect use a different
136 * form of raw reads than documented here, and servers are better off
137 * setting RawMode in this response to 0 for such sessions.
138 *
139 * If the negotiated dialect is "DOS LANMAN2.1" or "LANMAN2.1", then
140 * PrimaryDomain string should be included in this response.
141 *
142 * If the negotiated dialect is NT LM 0.12, the response format is
143 *
144 * Server Response Description
145 * ========================== =========================================
146 *
147 * UCHAR WordCount; Count of parameter words = 17
148 * USHORT DialectIndex; Index of selected dialect
149 * UCHAR SecurityMode; Security mode:
150 * bit 0: 0 = share, 1 = user
151 * bit 1: 1 = encrypt passwords
152 * USHORT MaxMpxCount; Max pending multiplexed requests
153 * USHORT MaxNumberVcs; Max VCs between client and server
154 * ULONG MaxBufferSize; Max transmit buffer size
155 * ULONG MaxRawSize; Maximum raw buffer size
156 * ULONG SessionKey; Unique token identifying this session
157 * ULONG Capabilities; Server capabilities
158 * ULONG SystemTimeLow; System (UTC) time of the server (low).
159 * ULONG SystemTimeHigh; System (UTC) time of the server (high).
160 * USHORT ServerTimeZone; Time zone of server (min from UTC)
161 * UCHAR EncryptionKeyLength; Length of encryption key.
162 * USHORT ByteCount; Count of data bytes
163 * UCHAR EncryptionKey[]; The challenge encryption key
164 * UCHAR OemDomainName[]; The name of the domain (in OEM chars)
165 *
166 * In addition to the definitions above, MaxBufferSize is the size of the
167 * largest message which the client can legitimately send to the server.
168 * If the client is using a connectionless protocol, MaxBufferSize must be
169 * set to the smaller of the server's internal buffer size and the amount
170 * of data which can be placed in a response packet.
171 *
172 * MaxRawSize specifies the maximum message size the server can send or
173 * receive for SMB_COM_WRITE_RAW or SMB_COM_READ_RAW.
174 *
175 * Connectionless clients must set Sid to 0 in the SMB request header.
176 *
177 * Capabilities allows the server to tell the client what it supports.
178 * The bit definitions defined in smb.h. Bit 0x2000 used to be set in
179 * the negotiate response capabilities but it caused problems with
180 * Windows 2000. It is probably not valid, it doesn't appear in the
181 * CIFS spec.
182 *
183 * 4.1.1.1 Errors
184 *
185 * SUCCESS/SUCCESS
186 * ERRSRV/ERRerror
187 */
188 #include <sys/types.h>
189 #include <sys/socket.h>
190 #include <netinet/in.h>
191 #include <smbsrv/smb_kproto.h>
192 #include <smbsrv/smbinfo.h>
193
194 static const smb_xlate_t smb_dialect[] = {
195 { DIALECT_UNKNOWN, "DIALECT_UNKNOWN" },
196 { PC_NETWORK_PROGRAM_1_0, "PC NETWORK PROGRAM 1.0" },
197 { PCLAN1_0, "PCLAN1.0" },
198 { MICROSOFT_NETWORKS_1_03, "MICROSOFT NETWORKS 1.03" },
199 { MICROSOFT_NETWORKS_3_0, "MICROSOFT NETWORKS 3.0" },
200 { LANMAN1_0, "LANMAN1.0" },
201 { LM1_2X002, "LM1.2X002" },
202 { DOS_LM1_2X002, "DOS LM1.2X002" },
203 { DOS_LANMAN2_1, "DOS LANMAN2.1" },
204 { LANMAN2_1, "LANMAN2.1" },
205 { Windows_for_Workgroups_3_1a, "Windows for Workgroups 3.1a" },
206 { NT_LM_0_12, "NT LM 0.12" },
207 { DIALECT_SMB2002, "SMB 2.002" },
208 { DIALECT_SMB2XXX, "SMB 2.???" },
209 };
210 static int smb_ndialects = sizeof (smb_dialect) / sizeof (smb_dialect[0]);
211
212 /*
213 * Maximum buffer size for DOS: chosen to be the same as NT.
214 * Do not change this value, DOS is very sensitive to it.
215 */
216 #define SMB_DOS_MAXBUF 0x1104
217
218 /*
219 * The DOS TCP rcvbuf is set to 8700 because DOS 6.1 seems to have problems
220 * with other values. DOS 6.1 seems to depend on a window value of 8700 to
221 * send the next set of data. If we return a window value of 40KB, after
222 * sending 8700 bytes of data, it will start the next set of data from 40KB
223 * instead of 8.7k. Why 8.7k? We have no idea; it is the value that NT uses.
224 * September 2000.
225 *
226 * IR104720 Increased smb_nt_tcp_rcvbuf from 40KB to just under 1MB to allow
227 * for a larger TCP window sizei based on observations of Windows 2000 and
228 * performance testing. March 2003.
229 */
230 static uint32_t smb_dos_tcp_rcvbuf = 8700;
231 static uint32_t smb_nt_tcp_rcvbuf = 1048560; /* scale factor of 4 */
232
233 /*
234 * Maximum number of simultaneously pending SMB requests allowed on
235 * one connection. This is like "credits" in SMB2, but SMB1 uses a
236 * fixed limit, having no way to request an increase like SMB2 does.
237 * Note: Some older clients only handle the low byte of this value,
238 * so this value should be less than 256.
239 */
240 static uint16_t smb_maxmpxcount = 64;
241
242 static int smb_xlate_dialect(const char *);
243
244 /*
245 * "Capabilities" offered by SMB1 Negotiate Protocol.
246 * See smb.h for descriptions.
247 *
248 * CAP_RAW_MODE, CAP_MPX_MODE are obsolete.
249 * UNICODE support is required for long share names,
250 * long file names and streams.
251 *
252 * For testing, one can patch this, i.e. remove the high bit to
253 * temporarily disable extended security, etc.
254 */
255 uint32_t smb1srv_capabilities =
256 CAP_UNICODE |
257 CAP_LARGE_FILES |
258 CAP_NT_SMBS |
259 CAP_RPC_REMOTE_APIS |
260 CAP_STATUS32 |
261 CAP_LEVEL_II_OPLOCKS |
262 CAP_LOCK_AND_READ |
263 CAP_NT_FIND |
264 CAP_DFS |
265 CAP_INFOLEVEL_PASSTHRU |
266 CAP_LARGE_READX |
267 CAP_LARGE_WRITEX |
268 CAP_EXTENDED_SECURITY;
269
270 /*
271 * SMB Negotiate gets special handling. This is called directly by
272 * the reader thread (see smbsr_newrq_initial) with what _should_ be
273 * an SMB1 Negotiate. Only the "\ffSMB" header has been checked
274 * when this is called, so this needs to check the SMB command,
275 * if it's Negotiate execute it, then send the reply, etc.
276 *
277 * Since this is called directly from the reader thread, we
278 * know this is the only thread currently using this session.
279 * This has to duplicate some of what smb1sr_work does as a
280 * result of bypassing the normal dispatch mechanism.
281 *
282 * The caller always frees this request.
283 *
284 * Return value is 0 for success, and anything else will
285 * terminate the reader thread (drop the connection).
286 */
287 int
288 smb1_newrq_negotiate(smb_request_t *sr)
289 {
290 smb_sdrc_t sdrc;
291 uint16_t pid_hi, pid_lo;
292
293 /*
294 * Decode the header
295 */
296 if (smb_mbc_decodef(&sr->command, SMB_HEADER_ED_FMT,
297 &sr->smb_com,
298 &sr->smb_rcls,
299 &sr->smb_reh,
300 &sr->smb_err,
301 &sr->smb_flg,
302 &sr->smb_flg2,
303 &pid_hi,
304 sr->smb_sig,
305 &sr->smb_tid,
306 &pid_lo,
307 &sr->smb_uid,
308 &sr->smb_mid) != 0)
309 return (-1);
310 if (sr->smb_com != SMB_COM_NEGOTIATE)
311 return (-1);
312
313 sr->smb_pid = (pid_hi << 16) | pid_lo;
314
315 /*
316 * Reserve space for the reply header.
317 */
318 (void) smb_mbc_encodef(&sr->reply, "#.", SMB_HEADER_LEN);
319 sr->first_smb_com = sr->smb_com;
320
321 if (smb_mbc_decodef(&sr->command, "b", &sr->smb_wct) != 0)
322 return (-1);
323 (void) MBC_SHADOW_CHAIN(&sr->smb_vwv, &sr->command,
324 sr->command.chain_offset, sr->smb_wct * 2);
325
326 if (smb_mbc_decodef(&sr->command, "#.w", sr->smb_wct*2, &sr->smb_bcc))
327 return (-1);
328 (void) MBC_SHADOW_CHAIN(&sr->smb_data, &sr->command,
329 sr->command.chain_offset, sr->smb_bcc);
330
331 sr->command.chain_offset += sr->smb_bcc;
332 if (sr->command.chain_offset > sr->command.max_bytes)
333 return (-1);
334
335 /* Store pointers for later */
336 sr->cur_reply_offset = sr->reply.chain_offset;
337
338 sdrc = smb_pre_negotiate(sr);
339 if (sdrc == SDRC_SUCCESS)
340 sdrc = smb_com_negotiate(sr);
341 smb_post_negotiate(sr);
342
343 if (sdrc != SDRC_NO_REPLY)
344 smbsr_send_reply(sr);
345 if (sdrc == SDRC_DROP_VC)
346 return (-1);
347
348 return (0);
349 }
350
351 smb_sdrc_t
352 smb_pre_negotiate(smb_request_t *sr)
353 {
354 smb_kmod_cfg_t *skc;
355 smb_arg_negotiate_t *negprot;
356 int dialect;
357 int pos;
358 int rc = 0;
359
360 skc = &sr->session->s_cfg;
361 negprot = smb_srm_zalloc(sr, sizeof (smb_arg_negotiate_t));
362 negprot->ni_index = -1;
363 sr->sr_negprot = negprot;
364
365 for (pos = 0; smbsr_decode_data_avail(sr); pos++) {
366 if (smbsr_decode_data(sr, "%L", sr, &negprot->ni_name) != 0) {
367 smbsr_error(sr, 0, ERRSRV, ERRerror);
368 rc = -1;
369 break;
370 }
371
372 if ((dialect = smb_xlate_dialect(negprot->ni_name)) < 0)
373 continue;
374
375 /*
376 * Conditionally recognize the SMB2 dialects.
377 */
378 if (dialect >= DIALECT_SMB2002 &&
379 skc->skc_max_protocol < SMB_VERS_2_BASE)
380 continue;
381
382 /*
383 * We may not support SMB1; skip those dialects if true.
384 */
385 if (dialect < DIALECT_SMB2002 &&
386 skc->skc_min_protocol > SMB_VERS_1)
387 continue;
388
389 if (dialect == DIALECT_SMB2002 &&
390 skc->skc_min_protocol > SMB_VERS_2_002)
391 continue;
392
393 if (negprot->ni_dialect < dialect) {
394 negprot->ni_dialect = dialect;
395 negprot->ni_index = pos;
396 }
397 }
398
399 DTRACE_SMB_START(op__Negotiate, smb_request_t *, sr);
400
401 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
402 }
403
404 void
405 smb_post_negotiate(smb_request_t *sr)
406 {
407 smb_arg_negotiate_t *negprot = sr->sr_negprot;
408
409 DTRACE_SMB_DONE(op__Negotiate, smb_request_t *, sr);
410
411 bzero(negprot, sizeof (smb_arg_negotiate_t));
412 }
413
414 smb_sdrc_t
415 smb_com_negotiate(smb_request_t *sr)
416 {
417 smb_session_t *session = sr->session;
418 smb_arg_negotiate_t *negprot = sr->sr_negprot;
419 uint16_t secmode;
420 uint32_t sesskey;
421 char *nbdomain;
422 uint8_t *wcbuf;
423 int wclen;
424 smb_msgbuf_t mb;
425 int rc;
426
427 if (session->s_state != SMB_SESSION_STATE_ESTABLISHED) {
428 /* The protocol has already been negotiated. */
429 smbsr_error(sr, 0, ERRSRV, ERRerror);
430 return (SDRC_ERROR);
431 }
432
433 if (negprot->ni_index < 0) {
434 cmn_err(CE_NOTE, "clnt %s no supported dialect",
435 sr->session->ip_addr_str);
436 smbsr_error(sr, 0, ERRSRV, ERRerror);
437 return (SDRC_DROP_VC);
438 }
439
440 /*
441 * Special case for negotiating SMB2 from SMB1. The client
442 * includes the "SMB 2..." dialects in the SMB1 negotiate,
443 * and if SMB2 is enabled, we choose one of those and then
444 * send an SMB2 reply to that SMB1 request. Yes, it's very
445 * strange, but this SMB1 request can have an SMB2 reply!
446 * To accomplish this, we let the SMB2 code send the reply
447 * and return the special code SDRC_NO_REPLY to the SMB1
448 * dispatch logic so it will NOT send an SMB1 reply.
449 * (Or possibly send an SMB1 error reply.)
450 */
451 if (negprot->ni_dialect >= DIALECT_SMB2002) {
452 rc = smb1_negotiate_smb2(sr);
453 ASSERT(rc == SDRC_NO_REPLY ||
454 rc == SDRC_DROP_VC || rc == SDRC_ERROR);
455 return (rc);
456 }
457
458 session->srv_secmode = NEGOTIATE_ENCRYPT_PASSWORDS |
459 NEGOTIATE_USER_SECURITY;
460 secmode = session->srv_secmode;
461 sesskey = session->sesskey;
462
463 negprot->ni_servertime.tv_sec = gethrestime_sec();
464 negprot->ni_servertime.tv_nsec = 0;
465 negprot->ni_tzcorrection = sr->sr_gmtoff / 60;
466 negprot->ni_maxmpxcount = smb_maxmpxcount;
467 negprot->ni_keylen = SMB_CHALLENGE_SZ;
468 bcopy(&session->challenge_key, negprot->ni_key, SMB_CHALLENGE_SZ);
469 nbdomain = sr->sr_cfg->skc_nbdomain;
470
471 negprot->ni_capabilities = smb1srv_capabilities;
472
473 switch (negprot->ni_dialect) {
474 case PC_NETWORK_PROGRAM_1_0: /* core */
475 (void) ksocket_setsockopt(session->sock, SOL_SOCKET,
476 SO_RCVBUF, (const void *)&smb_dos_tcp_rcvbuf,
477 sizeof (smb_dos_tcp_rcvbuf), CRED());
478 rc = smbsr_encode_result(sr, 1, 0, "bww", 1,
479 negprot->ni_index, 0);
480 break;
481
482 case Windows_for_Workgroups_3_1a:
483 case PCLAN1_0:
484 case MICROSOFT_NETWORKS_1_03:
485 case MICROSOFT_NETWORKS_3_0:
486 case LANMAN1_0:
487 case LM1_2X002:
488 case DOS_LM1_2X002:
489 (void) ksocket_setsockopt(session->sock, SOL_SOCKET,
490 SO_RCVBUF, (const void *)&smb_dos_tcp_rcvbuf,
491 sizeof (smb_dos_tcp_rcvbuf), CRED());
492 sr->smb_flg |= SMB_FLAGS_LOCK_AND_READ_OK;
493 rc = smbsr_encode_result(sr, 13, VAR_BCC,
494 "bwwwwwwlYww2.w#c",
495 13, /* wct */
496 negprot->ni_index, /* dialect index */
497 secmode, /* security mode */
498 SMB_DOS_MAXBUF, /* max buffer size */
499 1, /* max MPX */
500 1, /* max VCs */
501 0, /* read/write raw */
502 sesskey, /* session key */
503 negprot->ni_servertime.tv_sec, /* server date/time */
504 negprot->ni_tzcorrection,
505 (uint16_t)negprot->ni_keylen, /* encryption key length */
506 /* reserved field handled 2. */
507 VAR_BCC,
508 (int)negprot->ni_keylen,
509 negprot->ni_key); /* encryption key */
510 break;
511
512 case DOS_LANMAN2_1:
513 case LANMAN2_1:
514 (void) ksocket_setsockopt(session->sock, SOL_SOCKET,
515 SO_RCVBUF, (const void *)&smb_dos_tcp_rcvbuf,
516 sizeof (smb_dos_tcp_rcvbuf), CRED());
517 sr->smb_flg |= SMB_FLAGS_LOCK_AND_READ_OK;
518 rc = smbsr_encode_result(sr, 13, VAR_BCC,
519 "bwwwwwwlYww2.w#cs",
520 13, /* wct */
521 negprot->ni_index, /* dialect index */
522 secmode, /* security mode */
523 SMB_DOS_MAXBUF, /* max buffer size */
524 1, /* max MPX */
525 1, /* max VCs */
526 0, /* read/write raw */
527 sesskey, /* session key */
528 negprot->ni_servertime.tv_sec, /* server date/time */
529 negprot->ni_tzcorrection,
530 (uint16_t)negprot->ni_keylen, /* encryption key length */
531 /* reserved field handled 2. */
532 VAR_BCC,
533 (int)negprot->ni_keylen,
534 negprot->ni_key, /* encryption key */
535 nbdomain);
536 break;
537
538 case NT_LM_0_12:
539 (void) ksocket_setsockopt(session->sock, SOL_SOCKET,
540 SO_RCVBUF, (const void *)&smb_nt_tcp_rcvbuf,
541 sizeof (smb_nt_tcp_rcvbuf), CRED());
542
543 /*
544 * Allow SMB signatures if using encrypted passwords
545 */
546 if ((secmode & NEGOTIATE_ENCRYPT_PASSWORDS) &&
547 sr->sr_cfg->skc_signing_enable) {
548 secmode |= NEGOTIATE_SECURITY_SIGNATURES_ENABLED;
549 if (sr->sr_cfg->skc_signing_required)
550 secmode |=
551 NEGOTIATE_SECURITY_SIGNATURES_REQUIRED;
552
553 session->srv_secmode = secmode;
554 }
555
556 /*
557 * Does the client want Extended Security?
558 * (and if we have it enabled)
559 * If so, handle as if a different dialect.
560 */
561 if ((sr->smb_flg2 & SMB_FLAGS2_EXT_SEC) != 0 &&
562 (negprot->ni_capabilities & CAP_EXTENDED_SECURITY) != 0)
563 goto NT_LM_0_12_ext_sec;
564
565 /* Else deny knowledge of extended security. */
566 sr->smb_flg2 &= ~SMB_FLAGS2_EXT_SEC;
567 negprot->ni_capabilities &= ~CAP_EXTENDED_SECURITY;
568
569 /*
570 * nbdomain is not expected to be aligned.
571 * Use temporary buffer to avoid alignment padding
572 */
573 wclen = smb_wcequiv_strlen(nbdomain) + sizeof (smb_wchar_t);
574 wcbuf = smb_srm_zalloc(sr, wclen);
575 smb_msgbuf_init(&mb, wcbuf, wclen, SMB_MSGBUF_UNICODE);
576 if (smb_msgbuf_encode(&mb, "U", nbdomain) < 0) {
577 smb_msgbuf_term(&mb);
578 smbsr_error(sr, 0, ERRSRV, ERRerror);
579 return (SDRC_ERROR);
580 }
581
582 rc = smbsr_encode_result(sr, 17, VAR_BCC,
583 "bwbwwllllTwbw#c#c",
584 17, /* wct */
585 negprot->ni_index, /* dialect index */
586 secmode, /* security mode */
587 negprot->ni_maxmpxcount, /* max MPX */
588 1, /* max VCs */
589 (DWORD)smb_maxbufsize, /* max buffer size */
590 0xFFFF, /* max raw size */
591 sesskey, /* session key */
592 negprot->ni_capabilities,
593 &negprot->ni_servertime, /* system time */
594 negprot->ni_tzcorrection,
595 negprot->ni_keylen, /* encryption key length */
596 VAR_BCC,
597 (int)negprot->ni_keylen,
598 negprot->ni_key, /* encryption key */
599 wclen,
600 wcbuf); /* nbdomain (unicode) */
601
602 smb_msgbuf_term(&mb);
603 break;
604
605 NT_LM_0_12_ext_sec:
606 /*
607 * This is the "Extended Security" variant of
608 * dialect NT_LM_0_12.
609 */
610 rc = smbsr_encode_result(sr, 17, VAR_BCC,
611 "bwbwwllllTwbw#c#c",
612 17, /* wct */
613 negprot->ni_index, /* dialect index */
614 secmode, /* security mode */
615 negprot->ni_maxmpxcount, /* max MPX */
616 1, /* max VCs */
617 (DWORD)smb_maxbufsize, /* max buffer size */
618 0xFFFF, /* max raw size */
619 sesskey, /* session key */
620 negprot->ni_capabilities,
621 &negprot->ni_servertime, /* system time */
622 negprot->ni_tzcorrection,
623 0, /* encryption key length (MBZ) */
624 VAR_BCC,
625 UUID_LEN,
626 sr->sr_cfg->skc_machine_uuid,
627 sr->sr_cfg->skc_negtok_len,
628 sr->sr_cfg->skc_negtok);
629 break;
630
631
632 default:
633 rc = smbsr_encode_result(sr, 1, 0, "bww", 1, -1, 0);
634 break;
635 }
636
637 if (rc != 0)
638 return (SDRC_ERROR);
639
640 /*
641 * Save the agreed dialect. Note that the state is also
642 * used to detect and reject attempts to re-negotiate.
643 */
644 session->dialect = negprot->ni_dialect;
645 session->s_state = SMB_SESSION_STATE_NEGOTIATED;
646
647 /* Allow normal SMB1 requests now. */
648 session->newrq_func = smb1sr_newrq;
649
650 return (SDRC_SUCCESS);
651 }
652
653 static int
654 smb_xlate_dialect(const char *dialect)
655 {
656 const smb_xlate_t *dp;
657 int i;
658
659 for (i = 0; i < smb_ndialects; ++i) {
660 dp = &smb_dialect[i];
661
662 if (strcmp(dp->str, dialect) == 0)
663 return (dp->code);
664 }
665
666 return (-1);
667 }