2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "auth/credentials/credentials.h"
22 #include "auth/gensec/gensec.h"
23 #include "auth/auth.h"
24 #include "smb_server/smb_server.h"
25 #include "libcli/smb2/smb2.h"
26 #include "smb_server/smb2/smb2_server.h"
27 #include "smbd/service_stream.h"
28 #include "lib/stream/packet.h"
29 #include "param/param.h"
32 /* initialise the auth_context for this server and return the cryptkey */
33 static NTSTATUS
get_challenge(struct smbsrv_connection
*smb_conn
, uint8_t buff
[8])
37 /* muliple negprots are not premitted */
38 if (smb_conn
->negotiate
.auth_context
) {
39 DEBUG(3,("get challenge: is this a secondary negprot? auth_context is non-NULL!\n"));
40 return NT_STATUS_FOOBAR
;
43 DEBUG(10, ("get challenge: creating negprot_global_auth_context\n"));
45 nt_status
= auth_context_create(smb_conn
,
46 smb_conn
->connection
->event
.ctx
,
47 smb_conn
->connection
->msg_ctx
,
49 &smb_conn
->negotiate
.auth_context
);
50 if (!NT_STATUS_IS_OK(nt_status
)) {
51 DEBUG(0, ("auth_context_create() returned %s", nt_errstr(nt_status
)));
55 nt_status
= auth_get_challenge(smb_conn
->negotiate
.auth_context
, buff
);
56 if (!NT_STATUS_IS_OK(nt_status
)) {
57 DEBUG(0, ("auth_get_challenge() returned %s", nt_errstr(nt_status
)));
64 /****************************************************************************
65 Reply for the core protocol.
66 ****************************************************************************/
67 static void reply_corep(struct smbsrv_request
*req
, uint16_t choice
)
69 smbsrv_setup_reply(req
, 1, 0);
71 SSVAL(req
->out
.vwv
, VWV(0), choice
);
73 req
->smb_conn
->negotiate
.protocol
= PROTOCOL_CORE
;
75 if (req
->smb_conn
->signing
.mandatory_signing
) {
76 smbsrv_terminate_connection(req
->smb_conn
,
77 "CORE does not support SMB signing, and it is mandatory\n");
81 smbsrv_send_reply(req
);
84 /****************************************************************************
85 Reply for the coreplus protocol.
86 this is quite incomplete - we only fill in a small part of the reply, but as nobody uses
87 this any more it probably doesn't matter
88 ****************************************************************************/
89 static void reply_coreplus(struct smbsrv_request
*req
, uint16_t choice
)
91 uint16_t raw
= (lpcfg_readraw(req
->smb_conn
->lp_ctx
)?1:0) | (lpcfg_writeraw(req
->smb_conn
->lp_ctx
)?2:0);
93 smbsrv_setup_reply(req
, 13, 0);
95 /* Reply, SMBlockread, SMBwritelock supported. */
96 SCVAL(req
->out
.hdr
,HDR_FLG
,
97 CVAL(req
->out
.hdr
, HDR_FLG
) | FLAG_SUPPORT_LOCKREAD
);
99 SSVAL(req
->out
.vwv
, VWV(0), choice
);
100 SSVAL(req
->out
.vwv
, VWV(1), 0x1); /* user level security, don't encrypt */
102 /* tell redirector we support
103 readbraw and writebraw (possibly) */
104 SSVAL(req
->out
.vwv
, VWV(5), raw
);
106 req
->smb_conn
->negotiate
.protocol
= PROTOCOL_COREPLUS
;
108 if (req
->smb_conn
->signing
.mandatory_signing
) {
109 smbsrv_terminate_connection(req
->smb_conn
,
110 "COREPLUS does not support SMB signing, and it is mandatory\n");
114 smbsrv_send_reply(req
);
117 /****************************************************************************
118 Reply for the lanman 1.0 protocol.
119 ****************************************************************************/
120 static void reply_lanman1(struct smbsrv_request
*req
, uint16_t choice
)
122 int raw
= (lpcfg_readraw(req
->smb_conn
->lp_ctx
)?1:0) | (lpcfg_writeraw(req
->smb_conn
->lp_ctx
)?2:0);
124 time_t t
= req
->request_time
.tv_sec
;
126 req
->smb_conn
->negotiate
.encrypted_passwords
= lpcfg_encrypted_passwords(req
->smb_conn
->lp_ctx
);
128 if (lpcfg_security(req
->smb_conn
->lp_ctx
) != SEC_SHARE
)
129 secword
|= NEGOTIATE_SECURITY_USER_LEVEL
;
131 if (req
->smb_conn
->negotiate
.encrypted_passwords
)
132 secword
|= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE
;
134 req
->smb_conn
->negotiate
.protocol
= PROTOCOL_LANMAN1
;
136 smbsrv_setup_reply(req
, 13, req
->smb_conn
->negotiate
.encrypted_passwords
? 8 : 0);
138 /* SMBlockread, SMBwritelock supported. */
139 SCVAL(req
->out
.hdr
,HDR_FLG
,
140 CVAL(req
->out
.hdr
, HDR_FLG
) | FLAG_SUPPORT_LOCKREAD
);
142 SSVAL(req
->out
.vwv
, VWV(0), choice
);
143 SSVAL(req
->out
.vwv
, VWV(1), secword
);
144 SSVAL(req
->out
.vwv
, VWV(2), req
->smb_conn
->negotiate
.max_recv
);
145 SSVAL(req
->out
.vwv
, VWV(3), lpcfg_maxmux(req
->smb_conn
->lp_ctx
));
146 SSVAL(req
->out
.vwv
, VWV(4), 1);
147 SSVAL(req
->out
.vwv
, VWV(5), raw
);
148 SIVAL(req
->out
.vwv
, VWV(6), req
->smb_conn
->connection
->server_id
.pid
);
149 srv_push_dos_date(req
->smb_conn
, req
->out
.vwv
, VWV(8), t
);
150 SSVAL(req
->out
.vwv
, VWV(10), req
->smb_conn
->negotiate
.zone_offset
/60);
151 SIVAL(req
->out
.vwv
, VWV(11), 0); /* reserved */
153 /* Create a token value and add it to the outgoing packet. */
154 if (req
->smb_conn
->negotiate
.encrypted_passwords
) {
157 SSVAL(req
->out
.vwv
, VWV(11), 8);
159 nt_status
= get_challenge(req
->smb_conn
, req
->out
.data
);
160 if (!NT_STATUS_IS_OK(nt_status
)) {
161 smbsrv_terminate_connection(req
->smb_conn
, "LANMAN1 get_challenge failed\n");
166 if (req
->smb_conn
->signing
.mandatory_signing
) {
167 smbsrv_terminate_connection(req
->smb_conn
,
168 "LANMAN1 does not support SMB signing, and it is mandatory\n");
172 smbsrv_send_reply(req
);
175 /****************************************************************************
176 Reply for the lanman 2.0 protocol.
177 ****************************************************************************/
178 static void reply_lanman2(struct smbsrv_request
*req
, uint16_t choice
)
180 int raw
= (lpcfg_readraw(req
->smb_conn
->lp_ctx
)?1:0) | (lpcfg_writeraw(req
->smb_conn
->lp_ctx
)?2:0);
182 time_t t
= req
->request_time
.tv_sec
;
184 req
->smb_conn
->negotiate
.encrypted_passwords
= lpcfg_encrypted_passwords(req
->smb_conn
->lp_ctx
);
186 if (lpcfg_security(req
->smb_conn
->lp_ctx
) != SEC_SHARE
)
187 secword
|= NEGOTIATE_SECURITY_USER_LEVEL
;
189 if (req
->smb_conn
->negotiate
.encrypted_passwords
)
190 secword
|= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE
;
192 req
->smb_conn
->negotiate
.protocol
= PROTOCOL_LANMAN2
;
194 smbsrv_setup_reply(req
, 13, 0);
196 SSVAL(req
->out
.vwv
, VWV(0), choice
);
197 SSVAL(req
->out
.vwv
, VWV(1), secword
);
198 SSVAL(req
->out
.vwv
, VWV(2), req
->smb_conn
->negotiate
.max_recv
);
199 SSVAL(req
->out
.vwv
, VWV(3), lpcfg_maxmux(req
->smb_conn
->lp_ctx
));
200 SSVAL(req
->out
.vwv
, VWV(4), 1);
201 SSVAL(req
->out
.vwv
, VWV(5), raw
);
202 SIVAL(req
->out
.vwv
, VWV(6), req
->smb_conn
->connection
->server_id
.pid
);
203 srv_push_dos_date(req
->smb_conn
, req
->out
.vwv
, VWV(8), t
);
204 SSVAL(req
->out
.vwv
, VWV(10), req
->smb_conn
->negotiate
.zone_offset
/60);
205 SIVAL(req
->out
.vwv
, VWV(11), 0);
207 /* Create a token value and add it to the outgoing packet. */
208 if (req
->smb_conn
->negotiate
.encrypted_passwords
) {
209 SSVAL(req
->out
.vwv
, VWV(11), 8);
210 req_grow_data(req
, 8);
211 get_challenge(req
->smb_conn
, req
->out
.data
);
214 req_push_str(req
, NULL
, lpcfg_workgroup(req
->smb_conn
->lp_ctx
), -1, STR_TERMINATE
);
216 if (req
->smb_conn
->signing
.mandatory_signing
) {
217 smbsrv_terminate_connection(req
->smb_conn
,
218 "LANMAN2 does not support SMB signing, and it is mandatory\n");
222 smbsrv_send_reply(req
);
225 static void reply_nt1_orig(struct smbsrv_request
*req
)
227 /* Create a token value and add it to the outgoing packet. */
228 if (req
->smb_conn
->negotiate
.encrypted_passwords
) {
229 req_grow_data(req
, 8);
230 /* note that we do not send a challenge at all if
231 we are using plaintext */
232 get_challenge(req
->smb_conn
, req
->out
.ptr
);
234 SCVAL(req
->out
.vwv
+1, VWV(16), 8);
236 req_push_str(req
, NULL
, lpcfg_workgroup(req
->smb_conn
->lp_ctx
), -1, STR_UNICODE
|STR_TERMINATE
|STR_NOALIGN
);
237 req_push_str(req
, NULL
, lpcfg_netbios_name(req
->smb_conn
->lp_ctx
), -1, STR_UNICODE
|STR_TERMINATE
|STR_NOALIGN
);
238 DEBUG(3,("not using extended security (SPNEGO or NTLMSSP)\n"));
241 /****************************************************************************
242 Reply for the nt protocol.
243 ****************************************************************************/
244 static void reply_nt1(struct smbsrv_request
*req
, uint16_t choice
)
246 /* dual names + lock_and_read + nt SMBs + remote API calls */
249 time_t t
= req
->request_time
.tv_sec
;
251 bool negotiate_spnego
= false;
252 char *large_test_path
;
254 unix_to_nt_time(&nttime
, t
);
257 CAP_NT_FIND
| CAP_LOCK_AND_READ
|
258 CAP_LEVEL_II_OPLOCKS
| CAP_NT_SMBS
| CAP_RPC_REMOTE_APIS
;
260 req
->smb_conn
->negotiate
.encrypted_passwords
= lpcfg_encrypted_passwords(req
->smb_conn
->lp_ctx
);
262 /* do spnego in user level security if the client
263 supports it and we can do encrypted passwords */
265 if (req
->smb_conn
->negotiate
.encrypted_passwords
&&
266 (lpcfg_security(req
->smb_conn
->lp_ctx
) != SEC_SHARE
) &&
267 lpcfg_use_spnego(req
->smb_conn
->lp_ctx
) &&
268 (req
->flags2
& FLAGS2_EXTENDED_SECURITY
)) {
269 negotiate_spnego
= true;
270 capabilities
|= CAP_EXTENDED_SECURITY
;
273 if (lpcfg_unix_extensions(req
->smb_conn
->lp_ctx
)) {
274 capabilities
|= CAP_UNIX
;
277 if (lpcfg_large_readwrite(req
->smb_conn
->lp_ctx
)) {
278 capabilities
|= CAP_LARGE_READX
| CAP_LARGE_WRITEX
| CAP_W2K_SMBS
;
281 large_test_path
= lpcfg_lock_path(req
, req
->smb_conn
->lp_ctx
, "large_test.dat");
282 if (large_file_support(large_test_path
)) {
283 capabilities
|= CAP_LARGE_FILES
;
286 if (lpcfg_readraw(req
->smb_conn
->lp_ctx
) &&
287 lpcfg_writeraw(req
->smb_conn
->lp_ctx
)) {
288 capabilities
|= CAP_RAW_MODE
;
291 /* allow for disabling unicode */
292 if (lpcfg_unicode(req
->smb_conn
->lp_ctx
)) {
293 capabilities
|= CAP_UNICODE
;
296 if (lpcfg_nt_status_support(req
->smb_conn
->lp_ctx
)) {
297 capabilities
|= CAP_STATUS32
;
300 if (lpcfg_host_msdfs(req
->smb_conn
->lp_ctx
)) {
301 capabilities
|= CAP_DFS
;
304 if (lpcfg_security(req
->smb_conn
->lp_ctx
) != SEC_SHARE
) {
305 secword
|= NEGOTIATE_SECURITY_USER_LEVEL
;
308 if (req
->smb_conn
->negotiate
.encrypted_passwords
) {
309 secword
|= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE
;
312 if (req
->smb_conn
->signing
.allow_smb_signing
) {
313 secword
|= NEGOTIATE_SECURITY_SIGNATURES_ENABLED
;
316 if (req
->smb_conn
->signing
.mandatory_signing
) {
317 secword
|= NEGOTIATE_SECURITY_SIGNATURES_REQUIRED
;
320 req
->smb_conn
->negotiate
.protocol
= PROTOCOL_NT1
;
322 smbsrv_setup_reply(req
, 17, 0);
324 SSVAL(req
->out
.vwv
, VWV(0), choice
);
325 SCVAL(req
->out
.vwv
, VWV(1), secword
);
327 /* notice the strange +1 on vwv here? That's because
328 this is the one and only SMB packet that is malformed in
329 the specification - all the command words after the secword
330 are offset by 1 byte */
331 SSVAL(req
->out
.vwv
+1, VWV(1), lpcfg_maxmux(req
->smb_conn
->lp_ctx
));
332 SSVAL(req
->out
.vwv
+1, VWV(2), 1); /* num vcs */
333 SIVAL(req
->out
.vwv
+1, VWV(3), req
->smb_conn
->negotiate
.max_recv
);
334 SIVAL(req
->out
.vwv
+1, VWV(5), 0x10000); /* raw size. full 64k */
335 SIVAL(req
->out
.vwv
+1, VWV(7), req
->smb_conn
->connection
->server_id
.pid
); /* session key */
337 SIVAL(req
->out
.vwv
+1, VWV(9), capabilities
);
338 push_nttime(req
->out
.vwv
+1, VWV(11), nttime
);
339 SSVALS(req
->out
.vwv
+1,VWV(15), req
->smb_conn
->negotiate
.zone_offset
/60);
341 if (!negotiate_spnego
) {
344 struct cli_credentials
*server_credentials
;
345 struct gensec_security
*gensec_security
;
346 DATA_BLOB null_data_blob
= data_blob(NULL
, 0);
352 = cli_credentials_init(req
);
353 if (!server_credentials
) {
354 smbsrv_terminate_connection(req
->smb_conn
, "Failed to init server credentials\n");
358 cli_credentials_set_conf(server_credentials
, req
->smb_conn
->lp_ctx
);
359 nt_status
= cli_credentials_set_machine_account(server_credentials
, req
->smb_conn
->lp_ctx
);
360 if (!NT_STATUS_IS_OK(nt_status
)) {
361 DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(nt_status
)));
362 talloc_free(server_credentials
);
363 server_credentials
= NULL
;
366 nt_status
= samba_server_gensec_start(req
,
367 req
->smb_conn
->connection
->event
.ctx
,
368 req
->smb_conn
->connection
->msg_ctx
,
369 req
->smb_conn
->lp_ctx
,
374 if (!NT_STATUS_IS_OK(nt_status
)) {
375 DEBUG(0, ("Failed to start GENSEC: %s\n", nt_errstr(nt_status
)));
376 smbsrv_terminate_connection(req
->smb_conn
, "Failed to start GENSEC\n");
380 if (req
->smb_conn
->negotiate
.auth_context
) {
381 smbsrv_terminate_connection(req
->smb_conn
, "reply_nt1: is this a secondary negprot? auth_context is non-NULL!\n");
384 req
->smb_conn
->negotiate
.server_credentials
= talloc_reparent(req
, req
->smb_conn
, server_credentials
);
386 gensec_set_target_service(gensec_security
, "cifs");
388 gensec_set_credentials(gensec_security
, server_credentials
);
390 oid
= GENSEC_OID_SPNEGO
;
391 nt_status
= gensec_start_mech_by_oid(gensec_security
, oid
);
393 if (NT_STATUS_IS_OK(nt_status
)) {
394 /* Get and push the proposed OID list into the packets */
395 nt_status
= gensec_update(gensec_security
, req
, null_data_blob
, &blob
);
397 if (!NT_STATUS_IS_OK(nt_status
) && !NT_STATUS_EQUAL(nt_status
, NT_STATUS_MORE_PROCESSING_REQUIRED
)) {
398 DEBUG(1, ("Failed to get SPNEGO to give us the first token: %s\n", nt_errstr(nt_status
)));
402 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_MORE_PROCESSING_REQUIRED
)) {
403 DEBUG(3,("using SPNEGO\n"));
405 DEBUG(5, ("Failed to start SPNEGO, falling back to NTLMSSP only: %s\n", nt_errstr(nt_status
)));
406 oid
= GENSEC_OID_NTLMSSP
;
407 nt_status
= gensec_start_mech_by_oid(gensec_security
, oid
);
409 if (!NT_STATUS_IS_OK(nt_status
)) {
410 DEBUG(0, ("Failed to start SPNEGO as well as NTLMSSP fallback: %s\n", nt_errstr(nt_status
)));
414 /* NTLMSSP is a client-first exchange */
415 blob
= data_blob(NULL
, 0);
416 DEBUG(3,("using raw-NTLMSSP\n"));
419 req
->smb_conn
->negotiate
.oid
= oid
;
421 req_grow_data(req
, blob
.length
+ 16);
422 /* a NOT very random guid, perhaps we should get it
423 * from the credentials (kitchen sink...) */
424 memset(req
->out
.ptr
, '\0', 16);
427 memcpy(req
->out
.ptr
, blob
.data
, blob
.length
);
428 SCVAL(req
->out
.vwv
+1, VWV(16), blob
.length
+ 16);
429 req
->out
.ptr
+= blob
.length
;
432 smbsrv_send_reply_nosign(req
);
435 /****************************************************************************
436 Reply for the SMB2 2.001 protocol
437 ****************************************************************************/
438 static void reply_smb2(struct smbsrv_request
*req
, uint16_t choice
)
440 struct smbsrv_connection
*smb_conn
= req
->smb_conn
;
443 talloc_free(smb_conn
->sessions
.idtree_vuid
);
444 ZERO_STRUCT(smb_conn
->sessions
);
445 talloc_free(smb_conn
->smb_tcons
.idtree_tid
);
446 ZERO_STRUCT(smb_conn
->smb_tcons
);
447 ZERO_STRUCT(smb_conn
->signing
);
449 /* reply with a SMB2 packet */
450 status
= smbsrv_init_smb2_connection(smb_conn
);
451 if (!NT_STATUS_IS_OK(status
)) {
452 smbsrv_terminate_connection(smb_conn
, nt_errstr(status
));
456 packet_set_callback(smb_conn
->packet
, smbsrv_recv_smb2_request
);
457 smb2srv_reply_smb_negprot(req
);
461 /* List of supported protocols, most desired first */
462 static const struct {
463 const char *proto_name
;
464 const char *short_name
;
465 void (*proto_reply_fn
)(struct smbsrv_request
*req
, uint16_t choice
);
467 } supported_protocols
[] = {
468 {"SMB 2.002", "SMB2", reply_smb2
, PROTOCOL_SMB2
},
469 {"NT LANMAN 1.0", "NT1", reply_nt1
, PROTOCOL_NT1
},
470 {"NT LM 0.12", "NT1", reply_nt1
, PROTOCOL_NT1
},
471 {"LANMAN2.1", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
472 {"LM1.2X002", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
473 {"Samba", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
474 {"DOS LM1.2X002", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
475 {"Windows for Workgroups 3.1a", "LANMAN1", reply_lanman1
, PROTOCOL_LANMAN1
},
476 {"LANMAN1.0", "LANMAN1", reply_lanman1
, PROTOCOL_LANMAN1
},
477 {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1
, PROTOCOL_LANMAN1
},
478 {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus
, PROTOCOL_COREPLUS
},
479 {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep
, PROTOCOL_CORE
},
483 /****************************************************************************
485 ****************************************************************************/
487 void smbsrv_reply_negprot(struct smbsrv_request
*req
)
491 uint32_t protos_count
= 0;
492 char **protos
= NULL
;
494 if (req
->smb_conn
->negotiate
.done_negprot
) {
495 smbsrv_terminate_connection(req
->smb_conn
, "multiple negprot's are not permitted");
498 req
->smb_conn
->negotiate
.done_negprot
= true;
504 protos
= talloc_realloc(req
, protos
, char *, protos_count
+ 1);
506 smbsrv_terminate_connection(req
->smb_conn
, nt_errstr(NT_STATUS_NO_MEMORY
));
509 protos
[protos_count
] = NULL
;
510 len
= req_pull_ascii4(&req
->in
.bufinfo
, (const char **)&protos
[protos_count
], p
, STR_ASCII
|STR_TERMINATE
);
512 if (len
== 0 || !protos
[protos_count
]) break;
514 DEBUG(5,("Requested protocol [%d][%s]\n", protos_count
, protos
[protos_count
]));
518 /* Check for protocols, most desirable first */
519 for (protocol
= 0; supported_protocols
[protocol
].proto_name
; protocol
++) {
522 if (supported_protocols
[protocol
].protocol_level
> lpcfg_srv_maxprotocol(req
->smb_conn
->lp_ctx
))
524 if (supported_protocols
[protocol
].protocol_level
< lpcfg_srv_minprotocol(req
->smb_conn
->lp_ctx
))
527 for (i
= 0; i
< protos_count
; i
++) {
528 if (strcmp(supported_protocols
[protocol
].proto_name
, protos
[i
]) != 0) continue;
530 supported_protocols
[protocol
].proto_reply_fn(req
, i
);
531 DEBUG(3,("Selected protocol [%d][%s]\n",
532 i
, supported_protocols
[protocol
].proto_name
));
537 smbsrv_terminate_connection(req
->smb_conn
, "No protocol supported !");