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s3:smbd: Add a "hidden" parameter "share:fake_fscaps"
[Samba.git] / source4 / utils / ntlm_auth.c
blob2c6f353252efafd7e0c8761c98231b85f26a7607
1 /*
2 Unix SMB/CIFS implementation.
3
4 Winbind status program.
5
6 Copyright (C) Tim Potter 2000-2003
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
8 Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include "system/filesys.h"
26 #include "lib/cmdline/popt_common.h"
27 #include "lib/ldb/include/ldb.h"
28 #include "auth/credentials/credentials.h"
29 #include "auth/gensec/gensec.h"
30 #include "auth/auth.h"
31 #include "librpc/gen_ndr/ndr_netlogon.h"
32 #include "auth/auth_sam.h"
33 #include "auth/ntlm/ntlm_check.h"
34 #include "libcli/auth/libcli_auth.h"
35 #include "libcli/security/security.h"
36 #include "lib/events/events.h"
37 #include "lib/messaging/messaging.h"
38 #include "lib/messaging/irpc.h"
39 #include "auth/ntlmssp/ntlmssp.h"
40 #include "param/param.h"
41
42 #define INITIAL_BUFFER_SIZE 300
43 #define MAX_BUFFER_SIZE 63000
44
45 enum stdio_helper_mode {
46 SQUID_2_4_BASIC,
47 SQUID_2_5_BASIC,
48 SQUID_2_5_NTLMSSP,
49 NTLMSSP_CLIENT_1,
50 GSS_SPNEGO_CLIENT,
51 GSS_SPNEGO_SERVER,
52 NTLM_SERVER_1,
53 NUM_HELPER_MODES
54 };
55
56 #define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004
57 #define NTLM_AUTH_FLAG_LMKEY 0x0008
58
59
60 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
61 struct loadparm_context *lp_ctx,
62 char *buf, int length, void **private1,
63 unsigned int mux_id, void **private2);
64
65 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
66 struct loadparm_context *lp_ctx,
67 char *buf, int length, void **private1,
68 unsigned int mux_id, void **private2);
69
70 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
71 struct loadparm_context *lp_ctx,
72 char *buf, int length, void **private1,
73 unsigned int mux_id, void **private2);
74
75 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
76 struct loadparm_context *lp_ctx,
77 char *buf, int length, void **private1,
78 unsigned int mux_id, void **private2);
79
80 static void manage_squid_request(struct loadparm_context *lp_ctx,
81 enum stdio_helper_mode helper_mode,
82 stdio_helper_function fn, void **private2);
83
84 static const struct {
85 enum stdio_helper_mode mode;
86 const char *name;
87 stdio_helper_function fn;
88 } stdio_helper_protocols[] = {
89 { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
90 { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
91 { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
92 { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
93 { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
94 { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
95 { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
96 { NUM_HELPER_MODES, NULL, NULL}
97 };
98
99 extern int winbindd_fd;
100
101 static const char *opt_username;
102 static const char *opt_domain;
103 static const char *opt_workstation;
104 static const char *opt_password;
105 static int opt_multiplex;
106 static int use_cached_creds;
107
108
109 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
110
111 static void mux_printf(unsigned int mux_id, const char *format, ...)
112 {
113 va_list ap;
114
115 if (opt_multiplex) {
116 x_fprintf(x_stdout, "%d ", mux_id);
117 }
118
119 va_start(ap, format);
120 x_vfprintf(x_stdout, format, ap);
121 va_end(ap);
122 }
123
124
125
126 /* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
127 form DOMAIN/user into a domain and a user */
128
129 static bool parse_ntlm_auth_domain_user(const char *domuser, char **domain,
130 char **user, char winbind_separator)
131 {
132
133 char *p = strchr(domuser, winbind_separator);
134
135 if (!p) {
136 return false;
137 }
138
139 *user = smb_xstrdup(p+1);
140 *domain = smb_xstrdup(domuser);
141 (*domain)[PTR_DIFF(p, domuser)] = 0;
142
143 return true;
144 }
145
146 /**
147 * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
148 **/
149 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
150 {
151 DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
152 ret.length = ldb_base64_decode((char *)ret.data);
153 return ret;
154 }
155
156 /**
157 * Encode a base64 string into a talloc()ed string caller to free.
158 **/
159 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
160 {
161 return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
162 }
163
164 /**
165 * Decode a base64 string in-place - wrapper for the above
166 **/
167 static void base64_decode_inplace(char *s)
168 {
169 ldb_base64_decode(s);
170 }
171
172
173
174 /* Authenticate a user with a plaintext password */
175
176 static bool check_plaintext_auth(const char *user, const char *pass,
177 bool stdout_diagnostics)
178 {
179 return (strcmp(pass, opt_password) == 0);
180 }
181
182 /* authenticate a user with an encrypted username/password */
183
184 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
185 const char *username,
186 const char *domain,
187 const char *workstation,
188 const DATA_BLOB *challenge,
189 const DATA_BLOB *lm_response,
190 const DATA_BLOB *nt_response,
191 uint32_t flags,
192 DATA_BLOB *lm_session_key,
193 DATA_BLOB *user_session_key,
194 char **error_string,
195 char **unix_name)
196 {
197 NTSTATUS nt_status;
198 struct samr_Password lm_pw, nt_pw;
199 struct samr_Password *lm_pwd, *nt_pwd;
200 TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
201 if (!mem_ctx) {
202 nt_status = NT_STATUS_NO_MEMORY;
203 } else {
204
205 E_md4hash(opt_password, nt_pw.hash);
206 if (E_deshash(opt_password, lm_pw.hash)) {
207 lm_pwd = &lm_pw;
208 } else {
209 lm_pwd = NULL;
210 }
211 nt_pwd = &nt_pw;
212
213
214 nt_status = ntlm_password_check(mem_ctx,
215 lp_lanman_auth(lp_ctx),
216 lp_ntlm_auth(lp_ctx),
217 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
218 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
219 challenge,
220 lm_response,
221 nt_response,
222 username,
223 username,
224 domain,
225 lm_pwd, nt_pwd, user_session_key, lm_session_key);
226
227 if (NT_STATUS_IS_OK(nt_status)) {
228 if (unix_name) {
229 asprintf(unix_name,
230 "%s%c%s", domain,
231 *lp_winbind_separator(lp_ctx),
232 username);
233 }
234 } else {
235 DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
236 domain, username, workstation,
237 nt_errstr(nt_status)));
238 }
239 talloc_free(mem_ctx);
240 }
241 if (error_string) {
242 *error_string = strdup(nt_errstr(nt_status));
243 }
244 return nt_status;
245
246
247 }
248
249 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
250 struct loadparm_context *lp_ctx,
251 char *buf, int length, void **private1,
252 unsigned int mux_id, void **private2)
253 {
254 char *user, *pass;
255 user=buf;
256
257 pass = memchr(buf, ' ', length);
258 if (!pass) {
259 DEBUG(2, ("Password not found. Denying access\n"));
260 mux_printf(mux_id, "ERR\n");
261 return;
262 }
263 *pass='\0';
264 pass++;
265
266 if (stdio_helper_mode == SQUID_2_5_BASIC) {
267 rfc1738_unescape(user);
268 rfc1738_unescape(pass);
269 }
270
271 if (check_plaintext_auth(user, pass, false)) {
272 mux_printf(mux_id, "OK\n");
273 } else {
274 mux_printf(mux_id, "ERR\n");
275 }
276 }
277
278 /* This is a bit hairy, but the basic idea is to do a password callback
279 to the calling application. The callback comes from within gensec */
280
281 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
282 struct loadparm_context *lp_ctx,
283 char *buf, int length, void **private1,
284 unsigned int mux_id, void **password)
285 {
286 DATA_BLOB in;
287 if (strlen(buf) < 2) {
288 DEBUG(1, ("query [%s] invalid", buf));
289 mux_printf(mux_id, "BH Query invalid\n");
290 return;
291 }
292
293 if (strlen(buf) > 3) {
294 in = base64_decode_data_blob(NULL, buf + 3);
295 } else {
296 in = data_blob(NULL, 0);
297 }
298
299 if (strncmp(buf, "PW ", 3) == 0) {
300
301 *password = talloc_strndup(*private1 /* hopefully the right gensec context, useful to use for talloc */,
302 (const char *)in.data, in.length);
303
304 if (*password == NULL) {
305 DEBUG(1, ("Out of memory\n"));
306 mux_printf(mux_id, "BH Out of memory\n");
307 data_blob_free(&in);
308 return;
309 }
310
311 mux_printf(mux_id, "OK\n");
312 data_blob_free(&in);
313 return;
314 }
315 DEBUG(1, ("Asked for (and expected) a password\n"));
316 mux_printf(mux_id, "BH Expected a password\n");
317 data_blob_free(&in);
318 }
319
320 /**
321 * Callback for password credentials. This is not async, and when
322 * GENSEC and the credentials code is made async, it will look rather
323 * different.
324 */
325
326 static const char *get_password(struct cli_credentials *credentials)
327 {
328 char *password = NULL;
329
330 /* Ask for a password */
331 mux_printf((unsigned int)(uintptr_t)credentials->priv_data, "PW\n");
332 credentials->priv_data = NULL;
333
334 manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
335 return password;
336 }
337
338 /**
339 Check if a string is part of a list.
340 **/
341 static bool in_list(const char *s, const char *list, bool casesensitive)
342 {
343 char *tok;
344 size_t tok_len = 1024;
345 const char *p=list;
346
347 if (!list)
348 return false;
349
350 tok = (char *)malloc(tok_len);
351 if (!tok) {
352 return false;
353 }
354
355 while (next_token(&p, tok, LIST_SEP, tok_len)) {
356 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
357 free(tok);
358 return true;
359 }
360 }
361 free(tok);
362 return false;
363 }
364
365 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
366 {
367 if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
368 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
369 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
370 }
371 if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
372 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
373 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
374 }
375 if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
376 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
377 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
378 }
379 }
380
381 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
382 struct loadparm_context *lp_ctx,
383 char *buf, int length, void **private1,
384 unsigned int mux_id, void **private2)
385 {
386 DATA_BLOB in;
387 DATA_BLOB out = data_blob(NULL, 0);
388 char *out_base64 = NULL;
389 const char *reply_arg = NULL;
390 struct gensec_ntlm_state {
391 struct gensec_security *gensec_state;
392 const char *set_password;
393 };
394 struct gensec_ntlm_state *state;
395 struct tevent_context *ev;
396 struct messaging_context *msg;
397
398 NTSTATUS nt_status;
399 bool first = false;
400 const char *reply_code;
401 struct cli_credentials *creds;
402
403 static char *want_feature_list = NULL;
404 static DATA_BLOB session_key;
405
406 TALLOC_CTX *mem_ctx;
407
408 if (*private1) {
409 state = (struct gensec_ntlm_state *)*private1;
410 } else {
411 state = talloc_zero(NULL, struct gensec_ntlm_state);
412 if (!state) {
413 mux_printf(mux_id, "BH No Memory\n");
414 exit(1);
415 }
416 *private1 = state;
417 if (opt_password) {
418 state->set_password = opt_password;
419 }
420 }
421
422 if (strlen(buf) < 2) {
423 DEBUG(1, ("query [%s] invalid", buf));
424 mux_printf(mux_id, "BH Query invalid\n");
425 return;
426 }
427
428 if (strlen(buf) > 3) {
429 if(strncmp(buf, "SF ", 3) == 0) {
430 DEBUG(10, ("Setting flags to negotiate\n"));
431 talloc_free(want_feature_list);
432 want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
433 mux_printf(mux_id, "OK\n");
434 return;
435 }
436 in = base64_decode_data_blob(NULL, buf + 3);
437 } else {
438 in = data_blob(NULL, 0);
439 }
440
441 if (strncmp(buf, "YR", 2) == 0) {
442 if (state->gensec_state) {
443 talloc_free(state->gensec_state);
444 state->gensec_state = NULL;
445 }
446 } else if ( (strncmp(buf, "OK", 2) == 0)) {
447 /* Just return BH, like ntlm_auth from Samba 3 does. */
448 mux_printf(mux_id, "BH Command expected\n");
449 data_blob_free(&in);
450 return;
451 } else if ( (strncmp(buf, "TT ", 3) != 0) &&
452 (strncmp(buf, "KK ", 3) != 0) &&
453 (strncmp(buf, "AF ", 3) != 0) &&
454 (strncmp(buf, "NA ", 3) != 0) &&
455 (strncmp(buf, "UG", 2) != 0) &&
456 (strncmp(buf, "PW ", 3) != 0) &&
457 (strncmp(buf, "GK", 2) != 0) &&
458 (strncmp(buf, "GF", 2) != 0)) {
459 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
460 mux_printf(mux_id, "BH SPNEGO request invalid\n");
461 data_blob_free(&in);
462 return;
463 }
464
465 ev = s4_event_context_init(state);
466 if (!ev) {
467 exit(1);
468 }
469 /* setup gensec */
470 if (!(state->gensec_state)) {
471 switch (stdio_helper_mode) {
472 case GSS_SPNEGO_CLIENT:
473 case NTLMSSP_CLIENT_1:
474 /* setup the client side */
475
476 nt_status = gensec_client_start(NULL, &state->gensec_state, ev,
477 lp_gensec_settings(NULL, lp_ctx));
478 if (!NT_STATUS_IS_OK(nt_status)) {
479 exit(1);
480 }
481
482 break;
483 case GSS_SPNEGO_SERVER:
484 case SQUID_2_5_NTLMSSP:
485 {
486 const char *winbind_method[] = { "winbind", NULL };
487 struct auth_context *auth_context;
488
489 msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx),
490 lp_iconv_convenience(lp_ctx), ev);
491 if (!msg) {
492 exit(1);
493 }
494 nt_status = auth_context_create_methods(mem_ctx,
495 winbind_method,
496 ev,
497 msg,
498 lp_ctx,
499 &auth_context);
500
501 if (!NT_STATUS_IS_OK(nt_status)) {
502 exit(1);
503 }
504
505 if (!NT_STATUS_IS_OK(gensec_server_start(state, ev,
506 lp_gensec_settings(state, lp_ctx),
507 auth_context, &state->gensec_state))) {
508 exit(1);
509 }
510 break;
511 }
512 default:
513 abort();
514 }
515
516 creds = cli_credentials_init(state->gensec_state);
517 cli_credentials_set_conf(creds, lp_ctx);
518 if (opt_username) {
519 cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
520 }
521 if (opt_domain) {
522 cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
523 }
524 if (state->set_password) {
525 cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
526 } else {
527 cli_credentials_set_password_callback(creds, get_password);
528 creds->priv_data = (void*)(uintptr_t)mux_id;
529 }
530 if (opt_workstation) {
531 cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
532 }
533
534 switch (stdio_helper_mode) {
535 case GSS_SPNEGO_SERVER:
536 case SQUID_2_5_NTLMSSP:
537 cli_credentials_set_machine_account(creds, lp_ctx);
538 break;
539 default:
540 break;
541 }
542
543 gensec_set_credentials(state->gensec_state, creds);
544 gensec_want_feature_list(state->gensec_state, want_feature_list);
545
546 switch (stdio_helper_mode) {
547 case GSS_SPNEGO_CLIENT:
548 case GSS_SPNEGO_SERVER:
549 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
550 if (!in.length) {
551 first = true;
552 }
553 break;
554 case NTLMSSP_CLIENT_1:
555 if (!in.length) {
556 first = true;
557 }
558 /* fall through */
559 case SQUID_2_5_NTLMSSP:
560 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
561 break;
562 default:
563 abort();
564 }
565
566 if (!NT_STATUS_IS_OK(nt_status)) {
567 DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
568 mux_printf(mux_id, "BH GENSEC mech failed to start\n");
569 return;
570 }
571
572 }
573
574 /* update */
575 mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
576
577 if (strncmp(buf, "PW ", 3) == 0) {
578 state->set_password = talloc_strndup(state,
579 (const char *)in.data,
580 in.length);
581
582 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
583 state->set_password,
584 CRED_SPECIFIED);
585 mux_printf(mux_id, "OK\n");
586 data_blob_free(&in);
587 talloc_free(mem_ctx);
588 return;
589 }
590
591 if (strncmp(buf, "UG", 2) == 0) {
592 int i;
593 char *grouplist = NULL;
594 struct auth_session_info *session_info;
595
596 nt_status = gensec_session_info(state->gensec_state, &session_info);
597 if (!NT_STATUS_IS_OK(nt_status)) {
598 DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
599 mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
600 data_blob_free(&in);
601 talloc_free(mem_ctx);
602 return;
603 }
604
605 /* get the string onto the context */
606 grouplist = talloc_strdup(mem_ctx, "");
607
608 for (i=0; i<session_info->security_token->num_sids; i++) {
609 struct security_token *token = session_info->security_token;
610 const char *sidstr = dom_sid_string(session_info,
611 token->sids[i]);
612 grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
613 }
614
615 mux_printf(mux_id, "GL %s\n", grouplist);
616 talloc_free(session_info);
617 data_blob_free(&in);
618 talloc_free(mem_ctx);
619 return;
620 }
621
622 if (strncmp(buf, "GK", 2) == 0) {
623 char *base64_key;
624 DEBUG(10, ("Requested session key\n"));
625 nt_status = gensec_session_key(state->gensec_state, &session_key);
626 if(!NT_STATUS_IS_OK(nt_status)) {
627 DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
628 mux_printf(mux_id, "BH No session key\n");
629 talloc_free(mem_ctx);
630 return;
631 } else {
632 base64_key = base64_encode_data_blob(state, session_key);
633 mux_printf(mux_id, "GK %s\n", base64_key);
634 talloc_free(base64_key);
635 }
636 talloc_free(mem_ctx);
637 return;
638 }
639
640 if (strncmp(buf, "GF", 2) == 0) {
641 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
642 uint32_t neg_flags;
643
644 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
645 struct gensec_ntlmssp_state);
646 neg_flags = gensec_ntlmssp_state->neg_flags;
647
648 DEBUG(10, ("Requested negotiated feature flags\n"));
649 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
650 return;
651 }
652
653 nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
654
655 /* don't leak 'bad password'/'no such user' info to the network client */
656 nt_status = auth_nt_status_squash(nt_status);
657
658 if (out.length) {
659 out_base64 = base64_encode_data_blob(mem_ctx, out);
660 } else {
661 out_base64 = NULL;
662 }
663
664 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
665 reply_arg = "*";
666 if (first) {
667 reply_code = "YR";
668 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
669 reply_code = "KK";
670 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
671 reply_code = "TT";
672 } else {
673 abort();
674 }
675
676
677 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
678 reply_code = "BH NT_STATUS_ACCESS_DENIED";
679 reply_arg = nt_errstr(nt_status);
680 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
681 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
682 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
683 reply_arg = nt_errstr(nt_status);
684 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
685 } else if (!NT_STATUS_IS_OK(nt_status)) {
686 reply_code = "NA";
687 reply_arg = nt_errstr(nt_status);
688 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
689 } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
690 struct auth_session_info *session_info;
691
692 nt_status = gensec_session_info(state->gensec_state, &session_info);
693 if (!NT_STATUS_IS_OK(nt_status)) {
694 reply_code = "BH Failed to retrive session info";
695 reply_arg = nt_errstr(nt_status);
696 DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
697 } else {
698
699 reply_code = "AF";
700 reply_arg = talloc_asprintf(state->gensec_state,
701 "%s%s%s", session_info->server_info->domain_name,
702 lp_winbind_separator(lp_ctx), session_info->server_info->account_name);
703 talloc_free(session_info);
704 }
705 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
706 reply_code = "AF";
707 reply_arg = out_base64;
708 } else {
709 abort();
710 }
711
712 switch (stdio_helper_mode) {
713 case GSS_SPNEGO_SERVER:
714 mux_printf(mux_id, "%s %s %s\n", reply_code,
715 out_base64 ? out_base64 : "*",
716 reply_arg ? reply_arg : "*");
717 break;
718 default:
719 if (out_base64) {
720 mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
721 } else if (reply_arg) {
722 mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
723 } else {
724 mux_printf(mux_id, "%s\n", reply_code);
725 }
726 }
727
728 talloc_free(mem_ctx);
729 return;
730 }
731
732 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
733 struct loadparm_context *lp_ctx,
734 char *buf, int length, void **private1,
735 unsigned int mux_id, void **private2)
736 {
737 char *request, *parameter;
738 static DATA_BLOB challenge;
739 static DATA_BLOB lm_response;
740 static DATA_BLOB nt_response;
741 static char *full_username;
742 static char *username;
743 static char *domain;
744 static char *plaintext_password;
745 static bool ntlm_server_1_user_session_key;
746 static bool ntlm_server_1_lm_session_key;
747
748 if (strequal(buf, ".")) {
749 if (!full_username && !username) {
750 mux_printf(mux_id, "Error: No username supplied!\n");
751 } else if (plaintext_password) {
752 /* handle this request as plaintext */
753 if (!full_username) {
754 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username) == -1) {
755 mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
756 return;
757 }
758 }
759 if (check_plaintext_auth(full_username, plaintext_password, false)) {
760 mux_printf(mux_id, "Authenticated: Yes\n");
761 } else {
762 mux_printf(mux_id, "Authenticated: No\n");
763 }
764 } else if (!lm_response.data && !nt_response.data) {
765 mux_printf(mux_id, "Error: No password supplied!\n");
766 } else if (!challenge.data) {
767 mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
768 } else {
769 char *error_string = NULL;
770 DATA_BLOB lm_key;
771 DATA_BLOB user_session_key;
772 uint32_t flags = 0;
773
774 if (full_username && !username) {
775 SAFE_FREE(username);
776 SAFE_FREE(domain);
777 if (!parse_ntlm_auth_domain_user(full_username, &username,
778 &domain,
779 *lp_winbind_separator(lp_ctx))) {
780 /* username might be 'tainted', don't print into our new-line deleimianted stream */
781 mux_printf(mux_id, "Error: Could not parse into domain and username\n");
782 }
783 }
784
785 if (!domain) {
786 domain = smb_xstrdup(lp_workgroup(lp_ctx));
787 }
788
789 if (ntlm_server_1_lm_session_key)
790 flags |= NTLM_AUTH_FLAG_LMKEY;
791
792 if (ntlm_server_1_user_session_key)
793 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
794
795 if (!NT_STATUS_IS_OK(
796 local_pw_check_specified(lp_ctx,
797 username,
798 domain,
799 lp_netbios_name(lp_ctx),
800 &challenge,
801 &lm_response,
802 &nt_response,
803 flags,
804 &lm_key,
805 &user_session_key,
806 &error_string,
807 NULL))) {
808
809 mux_printf(mux_id, "Authenticated: No\n");
810 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
811 SAFE_FREE(error_string);
812 } else {
813 static char zeros[16];
814 char *hex_lm_key;
815 char *hex_user_session_key;
816
817 mux_printf(mux_id, "Authenticated: Yes\n");
818
819 if (ntlm_server_1_lm_session_key
820 && lm_key.length
821 && (memcmp(zeros, lm_key.data,
822 lm_key.length) != 0)) {
823 hex_encode(lm_key.data,
824 lm_key.length,
825 &hex_lm_key);
826 mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
827 SAFE_FREE(hex_lm_key);
828 }
829
830 if (ntlm_server_1_user_session_key
831 && user_session_key.length
832 && (memcmp(zeros, user_session_key.data,
833 user_session_key.length) != 0)) {
834 hex_encode(user_session_key.data,
835 user_session_key.length,
836 &hex_user_session_key);
837 mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
838 SAFE_FREE(hex_user_session_key);
839 }
840 }
841 }
842 /* clear out the state */
843 challenge = data_blob(NULL, 0);
844 nt_response = data_blob(NULL, 0);
845 lm_response = data_blob(NULL, 0);
846 SAFE_FREE(full_username);
847 SAFE_FREE(username);
848 SAFE_FREE(domain);
849 SAFE_FREE(plaintext_password);
850 ntlm_server_1_user_session_key = false;
851 ntlm_server_1_lm_session_key = false;
852 mux_printf(mux_id, ".\n");
853
854 return;
855 }
856
857 request = buf;
858
859 /* Indicates a base64 encoded structure */
860 parameter = strstr(request, ":: ");
861 if (!parameter) {
862 parameter = strstr(request, ": ");
863
864 if (!parameter) {
865 DEBUG(0, ("Parameter not found!\n"));
866 mux_printf(mux_id, "Error: Parameter not found!\n.\n");
867 return;
868 }
869
870 parameter[0] ='\0';
871 parameter++;
872 parameter[0] ='\0';
873 parameter++;
874
875 } else {
876 parameter[0] ='\0';
877 parameter++;
878 parameter[0] ='\0';
879 parameter++;
880 parameter[0] ='\0';
881 parameter++;
882
883 base64_decode_inplace(parameter);
884 }
885
886 if (strequal(request, "LANMAN-Challenge")) {
887 challenge = strhex_to_data_blob(NULL, parameter);
888 if (challenge.length != 8) {
889 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
890 parameter,
891 (int)challenge.length);
892 challenge = data_blob(NULL, 0);
893 }
894 } else if (strequal(request, "NT-Response")) {
895 nt_response = strhex_to_data_blob(NULL, parameter);
896 if (nt_response.length < 24) {
897 mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
898 parameter,
899 (int)nt_response.length);
900 nt_response = data_blob(NULL, 0);
901 }
902 } else if (strequal(request, "LANMAN-Response")) {
903 lm_response = strhex_to_data_blob(NULL, parameter);
904 if (lm_response.length != 24) {
905 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
906 parameter,
907 (int)lm_response.length);
908 lm_response = data_blob(NULL, 0);
909 }
910 } else if (strequal(request, "Password")) {
911 plaintext_password = smb_xstrdup(parameter);
912 } else if (strequal(request, "NT-Domain")) {
913 domain = smb_xstrdup(parameter);
914 } else if (strequal(request, "Username")) {
915 username = smb_xstrdup(parameter);
916 } else if (strequal(request, "Full-Username")) {
917 full_username = smb_xstrdup(parameter);
918 } else if (strequal(request, "Request-User-Session-Key")) {
919 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
920 } else if (strequal(request, "Request-LanMan-Session-Key")) {
921 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
922 } else {
923 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
924 }
925 }
926
927 static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
928 stdio_helper_function fn, void **private2)
929 {
930 char *buf;
931 char tmp[INITIAL_BUFFER_SIZE+1];
932 unsigned int mux_id = 0;
933 int length, buf_size = 0;
934 char *c;
935 struct mux_private {
936 unsigned int max_mux;
937 void **private_pointers;
938 };
939
940 static struct mux_private *mux_private;
941 static void *normal_private;
942 void **private1;
943
944 buf = talloc_strdup(NULL, "");
945
946 if (buf == NULL) {
947 DEBUG(0, ("Failed to allocate memory for reading the input "
948 "buffer.\n"));
949 x_fprintf(x_stdout, "ERR\n");
950 return;
951 }
952
953 do {
954 /* this is not a typo - x_fgets doesn't work too well under
955 * squid */
956 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
957 if (ferror(stdin)) {
958 DEBUG(1, ("fgets() failed! dying..... errno=%d "
959 "(%s)\n", ferror(stdin),
960 strerror(ferror(stdin))));
961
962 exit(1); /* BIIG buffer */
963 }
964 exit(0);
965 }
966
967 buf = talloc_strdup_append_buffer(buf, tmp);
968 buf_size += INITIAL_BUFFER_SIZE;
969
970 if (buf_size > MAX_BUFFER_SIZE) {
971 DEBUG(0, ("Invalid Request (too large)\n"));
972 x_fprintf(x_stdout, "ERR\n");
973 talloc_free(buf);
974 return;
975 }
976
977 c = strchr(buf, '\n');
978 } while (c == NULL);
979
980 *c = '\0';
981 length = c-buf;
982
983 DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
984
985 if (buf[0] == '\0') {
986 DEBUG(0, ("Invalid Request (empty)\n"));
987 x_fprintf(x_stdout, "ERR\n");
988 talloc_free(buf);
989 return;
990 }
991
992 if (opt_multiplex) {
993 if (sscanf(buf, "%u ", &mux_id) != 1) {
994 DEBUG(0, ("Invalid Request - no multiplex id\n"));
995 x_fprintf(x_stdout, "ERR\n");
996 talloc_free(buf);
997 return;
998 }
999 if (!mux_private) {
1000 mux_private = talloc(NULL, struct mux_private);
1001 mux_private->max_mux = 0;
1002 mux_private->private_pointers = NULL;
1003 }
1004
1005 c=strchr(buf,' ');
1006 if (!c) {
1007 DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
1008 x_fprintf(x_stdout, "ERR\n");
1009 talloc_free(buf);
1010 return;
1011 }
1012 c++;
1013 if (mux_id >= mux_private->max_mux) {
1014 unsigned int prev_max = mux_private->max_mux;
1015 mux_private->max_mux = mux_id + 1;
1016 mux_private->private_pointers
1017 = talloc_realloc(mux_private,
1018 mux_private->private_pointers,
1019 void *, mux_private->max_mux);
1020 memset(&mux_private->private_pointers[prev_max], '\0',
1021 (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
1022 };
1023
1024 private1 = &mux_private->private_pointers[mux_id];
1025 } else {
1026 c = buf;
1027 private1 = &normal_private;
1028 }
1029
1030 fn(helper_mode, lp_ctx, c, length, private1, mux_id, private2);
1031 talloc_free(buf);
1032 }
1033
1034 static void squid_stream(struct loadparm_context *lp_ctx,
1035 enum stdio_helper_mode stdio_mode,
1036 stdio_helper_function fn) {
1037 /* initialize FDescs */
1038 x_setbuf(x_stdout, NULL);
1039 x_setbuf(x_stderr, NULL);
1040 while(1) {
1041 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1042 }
1043 }
1044
1045
1046 /* Main program */
1047
1048 enum {
1049 OPT_USERNAME = 1000,
1050 OPT_DOMAIN,
1051 OPT_WORKSTATION,
1052 OPT_CHALLENGE,
1053 OPT_RESPONSE,
1054 OPT_LM,
1055 OPT_NT,
1056 OPT_PASSWORD,
1057 OPT_LM_KEY,
1058 OPT_USER_SESSION_KEY,
1059 OPT_DIAGNOSTICS,
1060 OPT_REQUIRE_MEMBERSHIP,
1061 OPT_MULTIPLEX,
1062 OPT_USE_CACHED_CREDS,
1063 };
1064
1065 int main(int argc, const char **argv)
1066 {
1067 static const char *helper_protocol;
1068 int opt;
1069
1070 poptContext pc;
1071
1072 /* NOTE: DO NOT change this interface without considering the implications!
1073 This is an external interface, which other programs will use to interact
1074 with this helper.
1075 */
1076
1077 /* We do not use single-letter command abbreviations, because they harm future
1078 interface stability. */
1079
1080 struct poptOption long_options[] = {
1081 POPT_AUTOHELP
1082 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1083 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1084 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1085 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1086 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1087 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1088 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1089 POPT_COMMON_SAMBA
1090 POPT_COMMON_VERSION
1091 { NULL }
1092 };
1093
1094 /* Samba client initialisation */
1095
1096 setup_logging(NULL, DEBUG_STDERR);
1097
1098 /* Parse options */
1099
1100 pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1101
1102 /* Parse command line options */
1103
1104 if (argc == 1) {
1105 poptPrintHelp(pc, stderr, 0);
1106 return 1;
1107 }
1108
1109 pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1110 POPT_CONTEXT_KEEP_FIRST);
1111
1112 while((opt = poptGetNextOpt(pc)) != -1) {
1113 if (opt < -1) {
1114 break;
1115 }
1116 }
1117 if (opt < -1) {
1118 fprintf(stderr, "%s: %s\n",
1119 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1120 poptStrerror(opt));
1121 return 1;
1122 }
1123
1124 gensec_init(cmdline_lp_ctx);
1125
1126 if (opt_domain == NULL) {
1127 opt_domain = lp_workgroup(cmdline_lp_ctx);
1128 }
1129
1130 if (helper_protocol) {
1131 int i;
1132 for (i=0; i<NUM_HELPER_MODES; i++) {
1133 if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1134 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1135 exit(0);
1136 }
1137 }
1138 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1139
1140 for (i=0; i<NUM_HELPER_MODES; i++) {
1141 x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1142 }
1143
1144 exit(1);
1145 }
1146
1147 if (!opt_username) {
1148 x_fprintf(x_stderr, "username must be specified!\n\n");
1149 poptPrintHelp(pc, stderr, 0);
1150 exit(1);
1151 }
1152
1153 if (opt_workstation == NULL) {
1154 opt_workstation = lp_netbios_name(cmdline_lp_ctx);
1155 }
1156
1157 if (!opt_password) {
1158 opt_password = getpass("password: ");
1159 }
1160
1161 {
1162 char *user;
1163
1164 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username);
1165 if (!check_plaintext_auth(user, opt_password, true)) {
1166 return 1;
1167 }
1168 }
1169
1170 /* Exit code */
1171
1172 poptFreeContext(pc);
1173 return 0;
1174 }
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