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 2 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, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 BOOL global_encrypted_passwords_negotiated
= False
;
26 BOOL global_spnego_negotiated
= False
;
27 struct auth_context
*negprot_global_auth_context
= NULL
;
29 static void get_challenge(char buff
[8])
32 const uint8
*cryptkey
;
34 /* We might be called more than once, muliple negprots are premitted */
35 if (negprot_global_auth_context
) {
36 DEBUG(3, ("get challenge: is this a secondary negprot? negprot_global_auth_context is non-NULL!\n"));
37 (negprot_global_auth_context
->free
)(&negprot_global_auth_context
);
40 DEBUG(10, ("get challenge: creating negprot_global_auth_context\n"));
41 if (!NT_STATUS_IS_OK(nt_status
= make_auth_context_subsystem(&negprot_global_auth_context
))) {
42 DEBUG(0, ("make_auth_context_subsystem returned %s", nt_errstr(nt_status
)));
43 smb_panic("cannot make_negprot_global_auth_context!\n");
45 DEBUG(10, ("get challenge: getting challenge\n"));
46 cryptkey
= negprot_global_auth_context
->get_ntlm_challenge(negprot_global_auth_context
);
47 memcpy(buff
, cryptkey
, 8);
50 /****************************************************************************
51 Reply for the core protocol.
52 ****************************************************************************/
54 static int reply_corep(char *inbuf
, char *outbuf
)
56 int outsize
= set_message(outbuf
,1,0,True
);
58 Protocol
= PROTOCOL_CORE
;
63 /****************************************************************************
64 Reply for the coreplus protocol.
65 ****************************************************************************/
67 static int reply_coreplus(char *inbuf
, char *outbuf
)
69 int raw
= (lp_readraw()?1:0) | (lp_writeraw()?2:0);
70 int outsize
= set_message(outbuf
,13,0,True
);
71 SSVAL(outbuf
,smb_vwv5
,raw
); /* tell redirector we support
72 readbraw and writebraw (possibly) */
73 /* Reply, SMBlockread, SMBwritelock supported. */
74 SCVAL(outbuf
,smb_flg
,FLAG_REPLY
|FLAG_SUPPORT_LOCKREAD
);
75 SSVAL(outbuf
,smb_vwv1
,0x1); /* user level security, don't encrypt */
77 Protocol
= PROTOCOL_COREPLUS
;
82 /****************************************************************************
83 Reply for the lanman 1.0 protocol.
84 ****************************************************************************/
86 static int reply_lanman1(char *inbuf
, char *outbuf
)
88 int raw
= (lp_readraw()?1:0) | (lp_writeraw()?2:0);
90 time_t t
= time(NULL
);
92 global_encrypted_passwords_negotiated
= lp_encrypted_passwords();
94 if (lp_security()>=SEC_USER
)
95 secword
|= NEGOTIATE_SECURITY_USER_LEVEL
;
96 if (global_encrypted_passwords_negotiated
)
97 secword
|= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE
;
99 set_message(outbuf
,13,global_encrypted_passwords_negotiated
?8:0,True
);
100 SSVAL(outbuf
,smb_vwv1
,secword
);
101 /* Create a token value and add it to the outgoing packet. */
102 if (global_encrypted_passwords_negotiated
) {
103 get_challenge(smb_buf(outbuf
));
104 SSVAL(outbuf
,smb_vwv11
, 8);
107 Protocol
= PROTOCOL_LANMAN1
;
109 /* Reply, SMBlockread, SMBwritelock supported. */
110 SCVAL(outbuf
,smb_flg
,FLAG_REPLY
|FLAG_SUPPORT_LOCKREAD
);
111 SSVAL(outbuf
,smb_vwv2
,max_recv
);
112 SSVAL(outbuf
,smb_vwv3
,lp_maxmux()); /* maxmux */
113 SSVAL(outbuf
,smb_vwv4
,1);
114 SSVAL(outbuf
,smb_vwv5
,raw
); /* tell redirector we support
115 readbraw writebraw (possibly) */
116 SIVAL(outbuf
,smb_vwv6
,sys_getpid());
117 SSVAL(outbuf
,smb_vwv10
, TimeDiff(t
)/60);
119 put_dos_date(outbuf
,smb_vwv8
,t
);
121 return (smb_len(outbuf
)+4);
124 /****************************************************************************
125 Reply for the lanman 2.0 protocol.
126 ****************************************************************************/
128 static int reply_lanman2(char *inbuf
, char *outbuf
)
130 int raw
= (lp_readraw()?1:0) | (lp_writeraw()?2:0);
132 time_t t
= time(NULL
);
134 global_encrypted_passwords_negotiated
= lp_encrypted_passwords();
136 if (lp_security()>=SEC_USER
)
137 secword
|= NEGOTIATE_SECURITY_USER_LEVEL
;
138 if (global_encrypted_passwords_negotiated
)
139 secword
|= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE
;
141 set_message(outbuf
,13,global_encrypted_passwords_negotiated
?8:0,True
);
142 SSVAL(outbuf
,smb_vwv1
,secword
);
143 SIVAL(outbuf
,smb_vwv6
,sys_getpid());
145 /* Create a token value and add it to the outgoing packet. */
146 if (global_encrypted_passwords_negotiated
) {
147 get_challenge(smb_buf(outbuf
));
148 SSVAL(outbuf
,smb_vwv11
, 8);
151 Protocol
= PROTOCOL_LANMAN2
;
153 /* Reply, SMBlockread, SMBwritelock supported. */
154 SCVAL(outbuf
,smb_flg
,FLAG_REPLY
|FLAG_SUPPORT_LOCKREAD
);
155 SSVAL(outbuf
,smb_vwv2
,max_recv
);
156 SSVAL(outbuf
,smb_vwv3
,lp_maxmux());
157 SSVAL(outbuf
,smb_vwv4
,1);
158 SSVAL(outbuf
,smb_vwv5
,raw
); /* readbraw and/or writebraw */
159 SSVAL(outbuf
,smb_vwv10
, TimeDiff(t
)/60);
160 put_dos_date(outbuf
,smb_vwv8
,t
);
162 return (smb_len(outbuf
)+4);
165 /****************************************************************************
166 Generate the spnego negprot reply blob. Return the number of bytes used.
167 ****************************************************************************/
169 static int negprot_spnego(char *p
)
173 const char *OIDs_krb5
[] = {OID_KERBEROS5
,
177 const char *OIDs_plain
[] = {OID_NTLMSSP
, NULL
};
181 global_spnego_negotiated
= True
;
184 safe_strcpy((char *)guid
, global_myname(), sizeof(guid
)-1);
187 /* valgrind fixer... */
189 size_t sl
= strlen(guid
);
191 memset(&guid
[sl
], '\0', sizeof(guid
)-sl
);
195 strlower_m((char *)guid
);
198 /* strangely enough, NT does not sent the single OID NTLMSSP when
199 not a ADS member, it sends no OIDs at all
201 we can't do this until we teach our sesssion setup parser to know
202 about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)
204 if (lp_security() != SEC_ADS
) {
209 if (lp_security() != SEC_ADS
) {
210 blob
= spnego_gen_negTokenInit(guid
, OIDs_plain
, "NONE");
212 asprintf(&principal
, "%s$@%s", guid
, lp_realm());
213 blob
= spnego_gen_negTokenInit(guid
, OIDs_krb5
, principal
);
216 memcpy(p
, blob
.data
, blob
.length
);
218 data_blob_free(&blob
);
222 /****************************************************************************
223 Reply for the nt protocol.
224 ****************************************************************************/
226 static int reply_nt1(char *inbuf
, char *outbuf
)
228 /* dual names + lock_and_read + nt SMBs + remote API calls */
229 int capabilities
= CAP_NT_FIND
|CAP_LOCK_AND_READ
|
230 CAP_LEVEL_II_OPLOCKS
;
233 time_t t
= time(NULL
);
235 BOOL negotiate_spnego
= False
;
237 global_encrypted_passwords_negotiated
= lp_encrypted_passwords();
239 /* do spnego in user level security if the client
240 supports it and we can do encrypted passwords */
242 if (global_encrypted_passwords_negotiated
&&
243 (lp_security() != SEC_SHARE
) &&
245 (SVAL(inbuf
, smb_flg2
) & FLAGS2_EXTENDED_SECURITY
)) {
246 negotiate_spnego
= True
;
247 capabilities
|= CAP_EXTENDED_SECURITY
;
250 capabilities
|= CAP_NT_SMBS
|CAP_RPC_REMOTE_APIS
;
252 if (lp_unix_extensions()) {
253 capabilities
|= CAP_UNIX
;
256 if (lp_large_readwrite() && (SMB_OFF_T_BITS
== 64))
257 capabilities
|= CAP_LARGE_READX
|CAP_LARGE_WRITEX
|CAP_W2K_SMBS
;
259 if (SMB_OFF_T_BITS
== 64)
260 capabilities
|= CAP_LARGE_FILES
;
262 if (lp_readraw() && lp_writeraw())
263 capabilities
|= CAP_RAW_MODE
;
265 /* allow for disabling unicode */
267 capabilities
|= CAP_UNICODE
;
269 if (lp_nt_status_support())
270 capabilities
|= CAP_STATUS32
;
273 capabilities
|= CAP_DFS
;
275 if (lp_security() >= SEC_USER
)
276 secword
|= NEGOTIATE_SECURITY_USER_LEVEL
;
277 if (global_encrypted_passwords_negotiated
)
278 secword
|= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE
;
280 if (lp_server_signing()) {
281 if (lp_security() >= SEC_USER
) {
282 secword
|= NEGOTIATE_SECURITY_SIGNATURES_ENABLED
;
283 /* No raw mode with smb signing. */
284 capabilities
&= ~CAP_RAW_MODE
;
285 if (lp_server_signing() == Required
)
286 secword
|=NEGOTIATE_SECURITY_SIGNATURES_REQUIRED
;
287 srv_set_signing_negotiated();
289 DEBUG(0,("reply_nt1: smb signing is incompatible with share level security !\n"));
290 if (lp_server_signing() == Required
) {
291 exit_server("reply_nt1: smb signing required and share level security selected.");
296 set_message(outbuf
,17,0,True
);
298 SCVAL(outbuf
,smb_vwv1
,secword
);
300 Protocol
= PROTOCOL_NT1
;
302 SSVAL(outbuf
,smb_vwv1
+1,lp_maxmux()); /* maxmpx */
303 SSVAL(outbuf
,smb_vwv2
+1,1); /* num vcs */
304 SIVAL(outbuf
,smb_vwv3
+1,max_recv
); /* max buffer. LOTS! */
305 SIVAL(outbuf
,smb_vwv5
+1,0x10000); /* raw size. full 64k */
306 SIVAL(outbuf
,smb_vwv7
+1,sys_getpid()); /* session key */
307 SIVAL(outbuf
,smb_vwv9
+1,capabilities
); /* capabilities */
308 put_long_date(outbuf
+smb_vwv11
+1,t
);
309 SSVALS(outbuf
,smb_vwv15
+1,TimeDiff(t
)/60);
311 p
= q
= smb_buf(outbuf
);
312 if (!negotiate_spnego
) {
313 /* Create a token value and add it to the outgoing packet. */
314 if (global_encrypted_passwords_negotiated
) {
315 /* note that we do not send a challenge at all if
316 we are using plaintext */
318 SSVALS(outbuf
,smb_vwv16
+1,8);
321 p
+= srvstr_push(outbuf
, p
, lp_workgroup(), -1,
322 STR_UNICODE
|STR_TERMINATE
|STR_NOALIGN
);
323 DEBUG(3,("not using SPNEGO\n"));
325 int len
= negprot_spnego(p
);
327 SSVALS(outbuf
,smb_vwv16
+1,len
);
329 DEBUG(3,("using SPNEGO\n"));
332 SSVAL(outbuf
,smb_vwv17
, p
- q
); /* length of challenge+domain strings */
333 set_message_end(outbuf
, p
);
335 return (smb_len(outbuf
)+4);
338 /* these are the protocol lists used for auto architecture detection:
341 protocol [PC NETWORK PROGRAM 1.0]
342 protocol [XENIX CORE]
343 protocol [MICROSOFT NETWORKS 1.03]
345 protocol [Windows for Workgroups 3.1a]
348 protocol [NT LM 0.12]
351 protocol [PC NETWORK PROGRAM 1.0]
352 protocol [XENIX CORE]
353 protocol [MICROSOFT NETWORKS 1.03]
355 protocol [Windows for Workgroups 3.1a]
358 protocol [NT LM 0.12]
361 protocol [PC NETWORK PROGRAM 1.0]
363 protocol [Windows for Workgroups 3.1a]
366 protocol [NT LM 0.12]
369 protocol [PC NETWORK PROGRAM 1.0]
370 protocol [XENIX CORE]
377 * Modified to recognize the architecture of the remote machine better.
379 * This appears to be the matrix of which protocol is used by which
381 Protocol WfWg Win95 WinNT Win2K OS/2
382 PC NETWORK PROGRAM 1.0 1 1 1 1 1
384 MICROSOFT NETWORKS 3.0 2 2
386 MICROSOFT NETWORKS 1.03 3
389 Windows for Workgroups 3.1a 5 5 5 3
394 * tim@fsg.com 09/29/95
395 * Win2K added by matty 17/7/99
398 #define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */
399 #define ARCH_WIN95 0x2
400 #define ARCH_WINNT 0x4
401 #define ARCH_WIN2K 0xC /* Win2K is like NT */
402 #define ARCH_OS2 0x14 /* Again OS/2 is like NT */
403 #define ARCH_SAMBA 0x20
405 #define ARCH_ALL 0x3F
407 /* List of supported protocols, most desired first */
408 static const struct {
409 const char *proto_name
;
410 const char *short_name
;
411 int (*proto_reply_fn
)(char *, char *);
413 } supported_protocols
[] = {
414 {"NT LANMAN 1.0", "NT1", reply_nt1
, PROTOCOL_NT1
},
415 {"NT LM 0.12", "NT1", reply_nt1
, PROTOCOL_NT1
},
416 {"LM1.2X002", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
417 {"Samba", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
418 {"DOS LM1.2X002", "LANMAN2", reply_lanman2
, PROTOCOL_LANMAN2
},
419 {"LANMAN1.0", "LANMAN1", reply_lanman1
, PROTOCOL_LANMAN1
},
420 {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1
, PROTOCOL_LANMAN1
},
421 {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus
, PROTOCOL_COREPLUS
},
422 {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep
, PROTOCOL_CORE
},
426 /****************************************************************************
428 ****************************************************************************/
430 int reply_negprot(connection_struct
*conn
,
431 char *inbuf
,char *outbuf
, int dum_size
,
434 int outsize
= set_message(outbuf
,1,0,True
);
439 int bcc
= SVAL(smb_buf(inbuf
),-2);
442 static BOOL done_negprot
= False
;
444 START_PROFILE(SMBnegprot
);
447 END_PROFILE(SMBnegprot
);
448 exit_server("multiple negprot's are not permitted");
452 p
= smb_buf(inbuf
)+1;
453 while (p
< (smb_buf(inbuf
) + bcc
)) {
455 DEBUG(3,("Requested protocol [%s]\n",p
));
456 if (strcsequal(p
,"Windows for Workgroups 3.1a"))
457 arch
&= ( ARCH_WFWG
| ARCH_WIN95
| ARCH_WINNT
| ARCH_WIN2K
);
458 else if (strcsequal(p
,"DOS LM1.2X002"))
459 arch
&= ( ARCH_WFWG
| ARCH_WIN95
);
460 else if (strcsequal(p
,"DOS LANMAN2.1"))
461 arch
&= ( ARCH_WFWG
| ARCH_WIN95
);
462 else if (strcsequal(p
,"NT LM 0.12"))
463 arch
&= ( ARCH_WIN95
| ARCH_WINNT
| ARCH_WIN2K
);
464 else if (strcsequal(p
,"LANMAN2.1"))
465 arch
&= ( ARCH_WINNT
| ARCH_WIN2K
| ARCH_OS2
);
466 else if (strcsequal(p
,"LM1.2X002"))
467 arch
&= ( ARCH_WINNT
| ARCH_WIN2K
| ARCH_OS2
);
468 else if (strcsequal(p
,"MICROSOFT NETWORKS 1.03"))
470 else if (strcsequal(p
,"XENIX CORE"))
471 arch
&= ( ARCH_WINNT
| ARCH_OS2
);
472 else if (strcsequal(p
,"Samba")) {
482 set_remote_arch(RA_SAMBA
);
485 set_remote_arch(RA_WFWG
);
488 set_remote_arch(RA_WIN95
);
491 if(SVAL(inbuf
,smb_flg2
)==FLAGS2_WIN2K_SIGNATURE
)
492 set_remote_arch(RA_WIN2K
);
494 set_remote_arch(RA_WINNT
);
497 set_remote_arch(RA_WIN2K
);
500 set_remote_arch(RA_OS2
);
503 set_remote_arch(RA_UNKNOWN
);
507 /* possibly reload - change of architecture */
508 reload_services(True
);
510 /* Check for protocols, most desirable first */
511 for (protocol
= 0; supported_protocols
[protocol
].proto_name
; protocol
++) {
512 p
= smb_buf(inbuf
)+1;
514 if ((supported_protocols
[protocol
].protocol_level
<= lp_maxprotocol()) &&
515 (supported_protocols
[protocol
].protocol_level
>= lp_minprotocol()))
516 while (p
< (smb_buf(inbuf
) + bcc
)) {
517 if (strequal(p
,supported_protocols
[protocol
].proto_name
))
526 SSVAL(outbuf
,smb_vwv0
,choice
);
528 extern fstring remote_proto
;
529 fstrcpy(remote_proto
,supported_protocols
[protocol
].short_name
);
530 reload_services(True
);
531 outsize
= supported_protocols
[protocol
].proto_reply_fn(inbuf
, outbuf
);
532 DEBUG(3,("Selected protocol %s\n",supported_protocols
[protocol
].proto_name
));
534 DEBUG(0,("No protocol supported !\n"));
536 SSVAL(outbuf
,smb_vwv0
,choice
);
538 DEBUG( 5, ( "negprot index=%d\n", choice
) );
540 if ((lp_server_signing() == Required
) && (Protocol
< PROTOCOL_NT1
)) {
541 exit_server("SMB signing is required and client negotiated a downlevel protocol");
544 END_PROFILE(SMBnegprot
);