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)
175 const char *OIDs_krb5[] = {OID_KERBEROS5,
179 const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
183 global_spnego_negotiated = True;
187 safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
188 strlower_m(unix_name);
189 push_ascii_nstring(dos_name, unix_name);
190 safe_strcpy((char *)guid, dos_name, sizeof(guid)-1);
193 /* valgrind fixer... */
195 size_t sl = strlen(guid);
197 memset(&guid[sl], '\0', sizeof(guid)-sl);
202 /* strangely enough, NT does not sent the single OID NTLMSSP when
203 not a ADS member, it sends no OIDs at all
205 we can't do this until we teach our sesssion setup parser to know
206 about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)
208 if (lp_security() != SEC_ADS) {
213 if (lp_security() != SEC_ADS) {
214 blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
216 asprintf(&principal, "%s$@%s", guid, lp_realm());
217 blob = spnego_gen_negTokenInit(guid, OIDs_krb5, principal);
220 memcpy(p, blob.data, blob.length);
222 data_blob_free(&blob);
226 /****************************************************************************
227 Reply for the nt protocol.
228 ****************************************************************************/
230 static int reply_nt1(char *inbuf, char *outbuf)
232 /* dual names + lock_and_read + nt SMBs + remote API calls */
233 int capabilities = CAP_NT_FIND|CAP_LOCK_AND_READ|
234 CAP_LEVEL_II_OPLOCKS;
237 time_t t = time(NULL);
239 BOOL negotiate_spnego = False;
241 global_encrypted_passwords_negotiated = lp_encrypted_passwords();
243 /* do spnego in user level security if the client
244 supports it and we can do encrypted passwords */
246 if (global_encrypted_passwords_negotiated &&
247 (lp_security() != SEC_SHARE) &&
249 (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY)) {
250 negotiate_spnego = True;
251 capabilities |= CAP_EXTENDED_SECURITY;
254 capabilities |= CAP_NT_SMBS|CAP_RPC_REMOTE_APIS|CAP_UNICODE;
256 if (lp_unix_extensions()) {
257 capabilities |= CAP_UNIX;
260 if (lp_large_readwrite() && (SMB_OFF_T_BITS == 64))
261 capabilities |= CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_W2K_SMBS;
263 if (SMB_OFF_T_BITS == 64)
264 capabilities |= CAP_LARGE_FILES;
266 if (lp_readraw() && lp_writeraw())
267 capabilities |= CAP_RAW_MODE;
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
404 #define ARCH_CIFSFS 0x40
406 #define ARCH_ALL 0x7F
408 /* List of supported protocols, most desired first */
409 static const struct {
410 const char *proto_name;
411 const char *short_name;
412 int (*proto_reply_fn)(char *, char *);
414 } supported_protocols[] = {
415 {"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
416 {"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1},
417 {"POSIX 2", "NT1", reply_nt1, PROTOCOL_NT1},
418 {"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
419 {"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
420 {"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
421 {"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
422 {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
423 {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS},
424 {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE},
428 /****************************************************************************
430 ****************************************************************************/
432 int reply_negprot(connection_struct *conn,
433 char *inbuf,char *outbuf, int dum_size,
436 int outsize = set_message(outbuf,1,0,True);
441 int bcc = SVAL(smb_buf(inbuf),-2);
444 static BOOL done_negprot = False;
446 START_PROFILE(SMBnegprot);
449 END_PROFILE(SMBnegprot);
450 exit_server("multiple negprot's are not permitted");
454 p = smb_buf(inbuf)+1;
455 while (p < (smb_buf(inbuf) + bcc)) {
457 DEBUG(3,("Requested protocol [%s]\n",p));
458 if (strcsequal(p,"Windows for Workgroups 3.1a"))
459 arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
460 else if (strcsequal(p,"DOS LM1.2X002"))
461 arch &= ( ARCH_WFWG | ARCH_WIN95 );
462 else if (strcsequal(p,"DOS LANMAN2.1"))
463 arch &= ( ARCH_WFWG | ARCH_WIN95 );
464 else if (strcsequal(p,"NT LM 0.12"))
465 arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K | ARCH_CIFSFS);
466 else if (strcsequal(p,"LANMAN2.1"))
467 arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
468 else if (strcsequal(p,"LM1.2X002"))
469 arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
470 else if (strcsequal(p,"MICROSOFT NETWORKS 1.03"))
472 else if (strcsequal(p,"XENIX CORE"))
473 arch &= ( ARCH_WINNT | ARCH_OS2 );
474 else if (strcsequal(p,"Samba")) {
477 } else if (strcsequal(p,"POSIX 2")) {
485 /* CIFSFS can send one arch only, NT LM 0.12. */
486 if (Index == 1 && (arch & ARCH_CIFSFS)) {
492 set_remote_arch(RA_CIFSFS);
495 set_remote_arch(RA_SAMBA);
498 set_remote_arch(RA_WFWG);
501 set_remote_arch(RA_WIN95);
504 if(SVAL(inbuf,smb_flg2)==FLAGS2_WIN2K_SIGNATURE)
505 set_remote_arch(RA_WIN2K);
507 set_remote_arch(RA_WINNT);
510 set_remote_arch(RA_WIN2K);
513 set_remote_arch(RA_OS2);
516 set_remote_arch(RA_UNKNOWN);
520 /* possibly reload - change of architecture */
521 reload_services(True);
523 /* Check for protocols, most desirable first */
524 for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) {
525 p = smb_buf(inbuf)+1;
527 if ((supported_protocols[protocol].protocol_level <= lp_maxprotocol()) &&
528 (supported_protocols[protocol].protocol_level >= lp_minprotocol()))
529 while (p < (smb_buf(inbuf) + bcc)) {
530 if (strequal(p,supported_protocols[protocol].proto_name))
539 SSVAL(outbuf,smb_vwv0,choice);
541 extern fstring remote_proto;
542 fstrcpy(remote_proto,supported_protocols[protocol].short_name);
543 reload_services(True);
544 outsize = supported_protocols[protocol].proto_reply_fn(inbuf, outbuf);
545 DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
547 DEBUG(0,("No protocol supported !\n"));
549 SSVAL(outbuf,smb_vwv0,choice);
551 DEBUG( 5, ( "negprot index=%d\n", choice ) );
553 if ((lp_server_signing() == Required) && (Protocol < PROTOCOL_NT1)) {
554 exit_server("SMB signing is required and client negotiated a downlevel protocol");
557 END_PROFILE(SMBnegprot);