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s3:connections: add a CNUM_OFFSET for mapping between cnum and the bitmap index
[Samba.git] / source4 / utils / ntlm_auth.c
blobcc92c170b6511a38efd890aee99d9d93a9c25404
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 <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 "libcli/auth/libcli_auth.h"
34 #include "libcli/security/security.h"
35 #include "lib/events/events.h"
36 #include "lib/messaging/messaging.h"
37 #include "lib/messaging/irpc.h"
38 #include "auth/ntlmssp/ntlmssp.h"
39 #include "param/param.h"
40
41 #define INITIAL_BUFFER_SIZE 300
42 #define MAX_BUFFER_SIZE 63000
43
44 enum stdio_helper_mode {
45 SQUID_2_4_BASIC,
46 SQUID_2_5_BASIC,
47 SQUID_2_5_NTLMSSP,
48 NTLMSSP_CLIENT_1,
49 GSS_SPNEGO_CLIENT,
50 GSS_SPNEGO_SERVER,
51 NTLM_SERVER_1,
52 NUM_HELPER_MODES
53 };
54
55 #define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004
56 #define NTLM_AUTH_FLAG_LMKEY 0x0008
57
58
59 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
60 struct loadparm_context *lp_ctx,
61 char *buf, int length, void **private1,
62 unsigned int mux_id, void **private2);
63
64 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
65 struct loadparm_context *lp_ctx,
66 char *buf, int length, void **private1,
67 unsigned int mux_id, void **private2);
68
69 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
70 struct loadparm_context *lp_ctx,
71 char *buf, int length, void **private1,
72 unsigned int mux_id, void **private2);
73
74 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
75 struct loadparm_context *lp_ctx,
76 char *buf, int length, void **private1,
77 unsigned int mux_id, void **private2);
78
79 static void manage_squid_request(struct loadparm_context *lp_ctx,
80 enum stdio_helper_mode helper_mode,
81 stdio_helper_function fn, void **private2);
82
83 static const struct {
84 enum stdio_helper_mode mode;
85 const char *name;
86 stdio_helper_function fn;
87 } stdio_helper_protocols[] = {
88 { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
89 { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
90 { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
91 { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
92 { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
93 { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
94 { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
95 { NUM_HELPER_MODES, NULL, NULL}
96 };
97
98 extern int winbindd_fd;
99
100 static const char *opt_username;
101 static const char *opt_domain;
102 static const char *opt_workstation;
103 static const char *opt_password;
104 static int opt_multiplex;
105 static int use_cached_creds;
106
107
108 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
109
110 static void mux_printf(unsigned int mux_id, const char *format, ...)
111 {
112 va_list ap;
113
114 if (opt_multiplex) {
115 x_fprintf(x_stdout, "%d ", mux_id);
116 }
117
118 va_start(ap, format);
119 x_vfprintf(x_stdout, format, ap);
120 va_end(ap);
121 }
122
123
124
125 /* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
126 form DOMAIN/user into a domain and a user */
127
128 static bool parse_ntlm_auth_domain_user(const char *domuser, char **domain,
129 char **user, char winbind_separator)
130 {
131
132 char *p = strchr(domuser, winbind_separator);
133
134 if (!p) {
135 return false;
136 }
137
138 *user = smb_xstrdup(p+1);
139 *domain = smb_xstrdup(domuser);
140 (*domain)[PTR_DIFF(p, domuser)] = 0;
141
142 return true;
143 }
144
145
146 /* Authenticate a user with a plaintext password */
147
148 static bool check_plaintext_auth(const char *user, const char *pass,
149 bool stdout_diagnostics)
150 {
151 return (strcmp(pass, opt_password) == 0);
152 }
153
154 /* authenticate a user with an encrypted username/password */
155
156 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
157 const char *username,
158 const char *domain,
159 const char *workstation,
160 const DATA_BLOB *challenge,
161 const DATA_BLOB *lm_response,
162 const DATA_BLOB *nt_response,
163 uint32_t flags,
164 DATA_BLOB *lm_session_key,
165 DATA_BLOB *user_session_key,
166 char **error_string,
167 char **unix_name)
168 {
169 NTSTATUS nt_status;
170 struct samr_Password lm_pw, nt_pw;
171 struct samr_Password *lm_pwd, *nt_pwd;
172 TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
173 if (!mem_ctx) {
174 nt_status = NT_STATUS_NO_MEMORY;
175 } else {
176
177 E_md4hash(opt_password, nt_pw.hash);
178 if (E_deshash(opt_password, lm_pw.hash)) {
179 lm_pwd = &lm_pw;
180 } else {
181 lm_pwd = NULL;
182 }
183 nt_pwd = &nt_pw;
184
185
186 nt_status = ntlm_password_check(mem_ctx,
187 lpcfg_lanman_auth(lp_ctx),
188 lpcfg_ntlm_auth(lp_ctx),
189 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
190 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
191 challenge,
192 lm_response,
193 nt_response,
194 username,
195 username,
196 domain,
197 lm_pwd, nt_pwd, user_session_key, lm_session_key);
198
199 if (NT_STATUS_IS_OK(nt_status)) {
200 if (unix_name) {
201 if (asprintf(unix_name, "%s%c%s", domain,
202 *lpcfg_winbind_separator(lp_ctx),
203 username) < 0) {
204 nt_status = NT_STATUS_NO_MEMORY;
205 }
206 }
207 } else {
208 DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
209 domain, username, workstation,
210 nt_errstr(nt_status)));
211 }
212 talloc_free(mem_ctx);
213 }
214 if (error_string) {
215 *error_string = strdup(nt_errstr(nt_status));
216 }
217 return nt_status;
218
219
220 }
221
222 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
223 struct loadparm_context *lp_ctx,
224 char *buf, int length, void **private1,
225 unsigned int mux_id, void **private2)
226 {
227 char *user, *pass;
228 user=buf;
229
230 pass = memchr(buf, ' ', length);
231 if (!pass) {
232 DEBUG(2, ("Password not found. Denying access\n"));
233 mux_printf(mux_id, "ERR\n");
234 return;
235 }
236 *pass='\0';
237 pass++;
238
239 if (stdio_helper_mode == SQUID_2_5_BASIC) {
240 rfc1738_unescape(user);
241 rfc1738_unescape(pass);
242 }
243
244 if (check_plaintext_auth(user, pass, false)) {
245 mux_printf(mux_id, "OK\n");
246 } else {
247 mux_printf(mux_id, "ERR\n");
248 }
249 }
250
251 /* This is a bit hairy, but the basic idea is to do a password callback
252 to the calling application. The callback comes from within gensec */
253
254 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
255 struct loadparm_context *lp_ctx,
256 char *buf, int length, void **private1,
257 unsigned int mux_id, void **password)
258 {
259 DATA_BLOB in;
260 if (strlen(buf) < 2) {
261 DEBUG(1, ("query [%s] invalid", buf));
262 mux_printf(mux_id, "BH Query invalid\n");
263 return;
264 }
265
266 if (strlen(buf) > 3) {
267 in = base64_decode_data_blob(buf + 3);
268 } else {
269 in = data_blob(NULL, 0);
270 }
271
272 if (strncmp(buf, "PW ", 3) == 0) {
273
274 *password = talloc_strndup(*private1 /* hopefully the right gensec context, useful to use for talloc */,
275 (const char *)in.data, in.length);
276
277 if (*password == NULL) {
278 DEBUG(1, ("Out of memory\n"));
279 mux_printf(mux_id, "BH Out of memory\n");
280 data_blob_free(&in);
281 return;
282 }
283
284 mux_printf(mux_id, "OK\n");
285 data_blob_free(&in);
286 return;
287 }
288 DEBUG(1, ("Asked for (and expected) a password\n"));
289 mux_printf(mux_id, "BH Expected a password\n");
290 data_blob_free(&in);
291 }
292
293 /**
294 * Callback for password credentials. This is not async, and when
295 * GENSEC and the credentials code is made async, it will look rather
296 * different.
297 */
298
299 static const char *get_password(struct cli_credentials *credentials)
300 {
301 char *password = NULL;
302
303 /* Ask for a password */
304 mux_printf((unsigned int)(uintptr_t)credentials->priv_data, "PW\n");
305 credentials->priv_data = NULL;
306
307 manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
308 return password;
309 }
310
311 /**
312 Check if a string is part of a list.
313 **/
314 static bool in_list(const char *s, const char *list, bool casesensitive)
315 {
316 char *tok;
317 size_t tok_len = 1024;
318 const char *p=list;
319
320 if (!list)
321 return false;
322
323 tok = (char *)malloc(tok_len);
324 if (!tok) {
325 return false;
326 }
327
328 while (next_token(&p, tok, LIST_SEP, tok_len)) {
329 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
330 free(tok);
331 return true;
332 }
333 }
334 free(tok);
335 return false;
336 }
337
338 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
339 {
340 if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
341 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
342 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
343 }
344 if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
345 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
346 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
347 }
348 if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
349 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
350 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
351 }
352 }
353
354 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
355 struct loadparm_context *lp_ctx,
356 char *buf, int length, void **private1,
357 unsigned int mux_id, void **private2)
358 {
359 DATA_BLOB in;
360 DATA_BLOB out = data_blob(NULL, 0);
361 char *out_base64 = NULL;
362 const char *reply_arg = NULL;
363 struct gensec_ntlm_state {
364 struct gensec_security *gensec_state;
365 const char *set_password;
366 };
367 struct gensec_ntlm_state *state;
368 struct tevent_context *ev;
369 struct imessaging_context *msg;
370
371 NTSTATUS nt_status;
372 bool first = false;
373 const char *reply_code;
374 struct cli_credentials *creds;
375
376 static char *want_feature_list = NULL;
377 static DATA_BLOB session_key;
378
379 TALLOC_CTX *mem_ctx;
380
381 if (*private1) {
382 state = (struct gensec_ntlm_state *)*private1;
383 } else {
384 state = talloc_zero(NULL, struct gensec_ntlm_state);
385 if (!state) {
386 mux_printf(mux_id, "BH No Memory\n");
387 exit(1);
388 }
389 *private1 = state;
390 if (opt_password) {
391 state->set_password = opt_password;
392 }
393 }
394
395 if (strlen(buf) < 2) {
396 DEBUG(1, ("query [%s] invalid", buf));
397 mux_printf(mux_id, "BH Query invalid\n");
398 return;
399 }
400
401 if (strlen(buf) > 3) {
402 if(strncmp(buf, "SF ", 3) == 0) {
403 DEBUG(10, ("Setting flags to negotiate\n"));
404 talloc_free(want_feature_list);
405 want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
406 mux_printf(mux_id, "OK\n");
407 return;
408 }
409 in = base64_decode_data_blob(buf + 3);
410 } else {
411 in = data_blob(NULL, 0);
412 }
413
414 if (strncmp(buf, "YR", 2) == 0) {
415 if (state->gensec_state) {
416 talloc_free(state->gensec_state);
417 state->gensec_state = NULL;
418 }
419 } else if ( (strncmp(buf, "OK", 2) == 0)) {
420 /* Just return BH, like ntlm_auth from Samba 3 does. */
421 mux_printf(mux_id, "BH Command expected\n");
422 data_blob_free(&in);
423 return;
424 } else if ( (strncmp(buf, "TT ", 3) != 0) &&
425 (strncmp(buf, "KK ", 3) != 0) &&
426 (strncmp(buf, "AF ", 3) != 0) &&
427 (strncmp(buf, "NA ", 3) != 0) &&
428 (strncmp(buf, "UG", 2) != 0) &&
429 (strncmp(buf, "PW ", 3) != 0) &&
430 (strncmp(buf, "GK", 2) != 0) &&
431 (strncmp(buf, "GF", 2) != 0)) {
432 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
433 mux_printf(mux_id, "BH SPNEGO request invalid\n");
434 data_blob_free(&in);
435 return;
436 }
437
438 ev = s4_event_context_init(state);
439 if (!ev) {
440 exit(1);
441 }
442
443 mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
444
445 /* setup gensec */
446 if (!(state->gensec_state)) {
447 switch (stdio_helper_mode) {
448 case GSS_SPNEGO_CLIENT:
449 case NTLMSSP_CLIENT_1:
450 /* setup the client side */
451
452 nt_status = gensec_client_start(NULL, &state->gensec_state,
453 lpcfg_gensec_settings(NULL, lp_ctx));
454 if (!NT_STATUS_IS_OK(nt_status)) {
455 talloc_free(mem_ctx);
456 exit(1);
457 }
458
459 break;
460 case GSS_SPNEGO_SERVER:
461 case SQUID_2_5_NTLMSSP:
462 {
463 const char *winbind_method[] = { "winbind", NULL };
464 struct auth4_context *auth_context;
465
466 msg = imessaging_client_init(state, lp_ctx, ev);
467 if (!msg) {
468 talloc_free(mem_ctx);
469 exit(1);
470 }
471 nt_status = auth_context_create_methods(mem_ctx,
472 winbind_method,
473 ev,
474 msg,
475 lp_ctx,
476 NULL,
477 &auth_context);
478
479 if (!NT_STATUS_IS_OK(nt_status)) {
480 talloc_free(mem_ctx);
481 exit(1);
482 }
483
484 if (!NT_STATUS_IS_OK(gensec_server_start(state,
485 lpcfg_gensec_settings(state, lp_ctx),
486 auth_context, &state->gensec_state))) {
487 talloc_free(mem_ctx);
488 exit(1);
489 }
490 break;
491 }
492 default:
493 talloc_free(mem_ctx);
494 abort();
495 }
496
497 creds = cli_credentials_init(state->gensec_state);
498 cli_credentials_set_conf(creds, lp_ctx);
499 if (opt_username) {
500 cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
501 }
502 if (opt_domain) {
503 cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
504 }
505 if (state->set_password) {
506 cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
507 } else {
508 cli_credentials_set_password_callback(creds, get_password);
509 creds->priv_data = (void*)(uintptr_t)mux_id;
510 }
511 if (opt_workstation) {
512 cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
513 }
514
515 switch (stdio_helper_mode) {
516 case GSS_SPNEGO_SERVER:
517 case SQUID_2_5_NTLMSSP:
518 cli_credentials_set_machine_account(creds, lp_ctx);
519 break;
520 default:
521 break;
522 }
523
524 gensec_set_credentials(state->gensec_state, creds);
525 gensec_want_feature_list(state->gensec_state, want_feature_list);
526
527 switch (stdio_helper_mode) {
528 case GSS_SPNEGO_CLIENT:
529 case GSS_SPNEGO_SERVER:
530 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
531 if (!in.length) {
532 first = true;
533 }
534 break;
535 case NTLMSSP_CLIENT_1:
536 if (!in.length) {
537 first = true;
538 }
539 /* fall through */
540 case SQUID_2_5_NTLMSSP:
541 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
542 break;
543 default:
544 talloc_free(mem_ctx);
545 abort();
546 }
547
548 if (!NT_STATUS_IS_OK(nt_status)) {
549 DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
550 mux_printf(mux_id, "BH GENSEC mech failed to start\n");
551 talloc_free(mem_ctx);
552 return;
553 }
554
555 }
556
557 /* update */
558
559 if (strncmp(buf, "PW ", 3) == 0) {
560 state->set_password = talloc_strndup(state,
561 (const char *)in.data,
562 in.length);
563
564 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
565 state->set_password,
566 CRED_SPECIFIED);
567 mux_printf(mux_id, "OK\n");
568 data_blob_free(&in);
569 talloc_free(mem_ctx);
570 return;
571 }
572
573 if (strncmp(buf, "UG", 2) == 0) {
574 int i;
575 char *grouplist = NULL;
576 struct auth_session_info *session_info;
577
578 nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
579 if (!NT_STATUS_IS_OK(nt_status)) {
580 DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
581 mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
582 data_blob_free(&in);
583 talloc_free(mem_ctx);
584 return;
585 }
586
587 /* get the string onto the context */
588 grouplist = talloc_strdup(mem_ctx, "");
589
590 for (i=0; i<session_info->security_token->num_sids; i++) {
591 struct security_token *token = session_info->security_token;
592 const char *sidstr = dom_sid_string(session_info,
593 &token->sids[i]);
594 grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
595 }
596
597 mux_printf(mux_id, "GL %s\n", grouplist);
598 talloc_free(session_info);
599 data_blob_free(&in);
600 talloc_free(mem_ctx);
601 return;
602 }
603
604 if (strncmp(buf, "GK", 2) == 0) {
605 char *base64_key;
606 DEBUG(10, ("Requested session key\n"));
607 nt_status = gensec_session_key(state->gensec_state, mem_ctx, &session_key);
608 if(!NT_STATUS_IS_OK(nt_status)) {
609 DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
610 mux_printf(mux_id, "BH No session key\n");
611 talloc_free(mem_ctx);
612 return;
613 } else {
614 base64_key = base64_encode_data_blob(state, session_key);
615 mux_printf(mux_id, "GK %s\n", base64_key);
616 talloc_free(base64_key);
617 }
618 talloc_free(mem_ctx);
619 return;
620 }
621
622 if (strncmp(buf, "GF", 2) == 0) {
623 struct ntlmssp_state *ntlmssp_state;
624 uint32_t neg_flags;
625
626 ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
627 struct ntlmssp_state);
628 neg_flags = ntlmssp_state->neg_flags;
629
630 DEBUG(10, ("Requested negotiated feature flags\n"));
631 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
632 return;
633 }
634
635 nt_status = gensec_update(state->gensec_state, mem_ctx, ev, in, &out);
636
637 /* don't leak 'bad password'/'no such user' info to the network client */
638 nt_status = nt_status_squash(nt_status);
639
640 if (out.length) {
641 out_base64 = base64_encode_data_blob(mem_ctx, out);
642 } else {
643 out_base64 = NULL;
644 }
645
646 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
647 reply_arg = "*";
648 if (first) {
649 reply_code = "YR";
650 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
651 reply_code = "KK";
652 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
653 reply_code = "TT";
654 } else {
655 abort();
656 }
657
658
659 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
660 reply_code = "BH NT_STATUS_ACCESS_DENIED";
661 reply_arg = nt_errstr(nt_status);
662 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
663 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
664 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
665 reply_arg = nt_errstr(nt_status);
666 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
667 } else if (!NT_STATUS_IS_OK(nt_status)) {
668 reply_code = "NA";
669 reply_arg = nt_errstr(nt_status);
670 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
671 } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
672 struct auth_session_info *session_info;
673
674 nt_status = gensec_session_info(state->gensec_state, mem_ctx, &session_info);
675 if (!NT_STATUS_IS_OK(nt_status)) {
676 reply_code = "BH Failed to retrive session info";
677 reply_arg = nt_errstr(nt_status);
678 DEBUG(1, ("GENSEC failed to retrieve the session info: %s\n", nt_errstr(nt_status)));
679 } else {
680
681 reply_code = "AF";
682 reply_arg = talloc_asprintf(state->gensec_state,
683 "%s%s%s", session_info->info->domain_name,
684 lpcfg_winbind_separator(lp_ctx), session_info->info->account_name);
685 talloc_free(session_info);
686 }
687 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
688 reply_code = "AF";
689 reply_arg = out_base64;
690 } else {
691 abort();
692 }
693
694 switch (stdio_helper_mode) {
695 case GSS_SPNEGO_SERVER:
696 mux_printf(mux_id, "%s %s %s\n", reply_code,
697 out_base64 ? out_base64 : "*",
698 reply_arg ? reply_arg : "*");
699 break;
700 default:
701 if (out_base64) {
702 mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
703 } else if (reply_arg) {
704 mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
705 } else {
706 mux_printf(mux_id, "%s\n", reply_code);
707 }
708 }
709
710 talloc_free(mem_ctx);
711 return;
712 }
713
714 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
715 struct loadparm_context *lp_ctx,
716 char *buf, int length, void **private1,
717 unsigned int mux_id, void **private2)
718 {
719 char *request, *parameter;
720 static DATA_BLOB challenge;
721 static DATA_BLOB lm_response;
722 static DATA_BLOB nt_response;
723 static char *full_username;
724 static char *username;
725 static char *domain;
726 static char *plaintext_password;
727 static bool ntlm_server_1_user_session_key;
728 static bool ntlm_server_1_lm_session_key;
729
730 if (strequal(buf, ".")) {
731 if (!full_username && !username) {
732 mux_printf(mux_id, "Error: No username supplied!\n");
733 } else if (plaintext_password) {
734 /* handle this request as plaintext */
735 if (!full_username) {
736 if (asprintf(&full_username, "%s%c%s", domain, *lpcfg_winbind_separator(lp_ctx), username) < 0) {
737 mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
738 return;
739 }
740 }
741 if (check_plaintext_auth(full_username, plaintext_password, false)) {
742 mux_printf(mux_id, "Authenticated: Yes\n");
743 } else {
744 mux_printf(mux_id, "Authenticated: No\n");
745 }
746 } else if (!lm_response.data && !nt_response.data) {
747 mux_printf(mux_id, "Error: No password supplied!\n");
748 } else if (!challenge.data) {
749 mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
750 } else {
751 char *error_string = NULL;
752 DATA_BLOB lm_key;
753 DATA_BLOB user_session_key;
754 uint32_t flags = 0;
755
756 if (full_username && !username) {
757 SAFE_FREE(username);
758 SAFE_FREE(domain);
759 if (!parse_ntlm_auth_domain_user(full_username, &username,
760 &domain,
761 *lpcfg_winbind_separator(lp_ctx))) {
762 /* username might be 'tainted', don't print into our new-line deleimianted stream */
763 mux_printf(mux_id, "Error: Could not parse into domain and username\n");
764 }
765 }
766
767 if (!domain) {
768 domain = smb_xstrdup(lpcfg_workgroup(lp_ctx));
769 }
770
771 if (ntlm_server_1_lm_session_key)
772 flags |= NTLM_AUTH_FLAG_LMKEY;
773
774 if (ntlm_server_1_user_session_key)
775 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
776
777 if (!NT_STATUS_IS_OK(
778 local_pw_check_specified(lp_ctx,
779 username,
780 domain,
781 lpcfg_netbios_name(lp_ctx),
782 &challenge,
783 &lm_response,
784 &nt_response,
785 flags,
786 &lm_key,
787 &user_session_key,
788 &error_string,
789 NULL))) {
790
791 mux_printf(mux_id, "Authenticated: No\n");
792 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
793 SAFE_FREE(error_string);
794 } else {
795 static char zeros[16];
796 char *hex_lm_key;
797 char *hex_user_session_key;
798
799 mux_printf(mux_id, "Authenticated: Yes\n");
800
801 if (ntlm_server_1_lm_session_key
802 && lm_key.length
803 && (memcmp(zeros, lm_key.data,
804 lm_key.length) != 0)) {
805 hex_encode(lm_key.data,
806 lm_key.length,
807 &hex_lm_key);
808 mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
809 SAFE_FREE(hex_lm_key);
810 }
811
812 if (ntlm_server_1_user_session_key
813 && user_session_key.length
814 && (memcmp(zeros, user_session_key.data,
815 user_session_key.length) != 0)) {
816 hex_encode(user_session_key.data,
817 user_session_key.length,
818 &hex_user_session_key);
819 mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
820 SAFE_FREE(hex_user_session_key);
821 }
822 }
823 }
824 /* clear out the state */
825 challenge = data_blob(NULL, 0);
826 nt_response = data_blob(NULL, 0);
827 lm_response = data_blob(NULL, 0);
828 SAFE_FREE(full_username);
829 SAFE_FREE(username);
830 SAFE_FREE(domain);
831 SAFE_FREE(plaintext_password);
832 ntlm_server_1_user_session_key = false;
833 ntlm_server_1_lm_session_key = false;
834 mux_printf(mux_id, ".\n");
835
836 return;
837 }
838
839 request = buf;
840
841 /* Indicates a base64 encoded structure */
842 parameter = strstr(request, ":: ");
843 if (!parameter) {
844 parameter = strstr(request, ": ");
845
846 if (!parameter) {
847 DEBUG(0, ("Parameter not found!\n"));
848 mux_printf(mux_id, "Error: Parameter not found!\n.\n");
849 return;
850 }
851
852 parameter[0] ='\0';
853 parameter++;
854 parameter[0] ='\0';
855 parameter++;
856
857 } else {
858 parameter[0] ='\0';
859 parameter++;
860 parameter[0] ='\0';
861 parameter++;
862 parameter[0] ='\0';
863 parameter++;
864
865 base64_decode_inplace(parameter);
866 }
867
868 if (strequal(request, "LANMAN-Challenge")) {
869 challenge = strhex_to_data_blob(NULL, parameter);
870 if (challenge.length != 8) {
871 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
872 parameter,
873 (int)challenge.length);
874 challenge = data_blob(NULL, 0);
875 }
876 } else if (strequal(request, "NT-Response")) {
877 nt_response = strhex_to_data_blob(NULL, parameter);
878 if (nt_response.length < 24) {
879 mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
880 parameter,
881 (int)nt_response.length);
882 nt_response = data_blob(NULL, 0);
883 }
884 } else if (strequal(request, "LANMAN-Response")) {
885 lm_response = strhex_to_data_blob(NULL, parameter);
886 if (lm_response.length != 24) {
887 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
888 parameter,
889 (int)lm_response.length);
890 lm_response = data_blob(NULL, 0);
891 }
892 } else if (strequal(request, "Password")) {
893 plaintext_password = smb_xstrdup(parameter);
894 } else if (strequal(request, "NT-Domain")) {
895 domain = smb_xstrdup(parameter);
896 } else if (strequal(request, "Username")) {
897 username = smb_xstrdup(parameter);
898 } else if (strequal(request, "Full-Username")) {
899 full_username = smb_xstrdup(parameter);
900 } else if (strequal(request, "Request-User-Session-Key")) {
901 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
902 } else if (strequal(request, "Request-LanMan-Session-Key")) {
903 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
904 } else {
905 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
906 }
907 }
908
909 static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
910 stdio_helper_function fn, void **private2)
911 {
912 char *buf;
913 char tmp[INITIAL_BUFFER_SIZE+1];
914 unsigned int mux_id = 0;
915 int length, buf_size = 0;
916 char *c;
917 struct mux_private {
918 unsigned int max_mux;
919 void **private_pointers;
920 };
921
922 static struct mux_private *mux_private;
923 static void *normal_private;
924 void **private1;
925
926 buf = talloc_strdup(NULL, "");
927
928 if (buf == NULL) {
929 DEBUG(0, ("Failed to allocate memory for reading the input "
930 "buffer.\n"));
931 x_fprintf(x_stdout, "ERR\n");
932 return;
933 }
934
935 do {
936 /* this is not a typo - x_fgets doesn't work too well under
937 * squid */
938 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
939 if (ferror(stdin)) {
940 DEBUG(1, ("fgets() failed! dying..... errno=%d "
941 "(%s)\n", ferror(stdin),
942 strerror(ferror(stdin))));
943
944 exit(1); /* BIIG buffer */
945 }
946 exit(0);
947 }
948
949 buf = talloc_strdup_append_buffer(buf, tmp);
950 buf_size += INITIAL_BUFFER_SIZE;
951
952 if (buf_size > MAX_BUFFER_SIZE) {
953 DEBUG(0, ("Invalid Request (too large)\n"));
954 x_fprintf(x_stdout, "ERR\n");
955 talloc_free(buf);
956 return;
957 }
958
959 c = strchr(buf, '\n');
960 } while (c == NULL);
961
962 *c = '\0';
963 length = c-buf;
964
965 DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
966
967 if (buf[0] == '\0') {
968 DEBUG(0, ("Invalid Request (empty)\n"));
969 x_fprintf(x_stdout, "ERR\n");
970 talloc_free(buf);
971 return;
972 }
973
974 if (opt_multiplex) {
975 if (sscanf(buf, "%u ", &mux_id) != 1) {
976 DEBUG(0, ("Invalid Request - no multiplex id\n"));
977 x_fprintf(x_stdout, "ERR\n");
978 talloc_free(buf);
979 return;
980 }
981 if (!mux_private) {
982 mux_private = talloc(NULL, struct mux_private);
983 mux_private->max_mux = 0;
984 mux_private->private_pointers = NULL;
985 }
986
987 c=strchr(buf,' ');
988 if (!c) {
989 DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
990 x_fprintf(x_stdout, "ERR\n");
991 talloc_free(buf);
992 return;
993 }
994 c++;
995 if (mux_id >= mux_private->max_mux) {
996 unsigned int prev_max = mux_private->max_mux;
997 mux_private->max_mux = mux_id + 1;
998 mux_private->private_pointers
999 = talloc_realloc(mux_private,
1000 mux_private->private_pointers,
1001 void *, mux_private->max_mux);
1002 memset(&mux_private->private_pointers[prev_max], '\0',
1003 (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
1004 };
1005
1006 private1 = &mux_private->private_pointers[mux_id];
1007 } else {
1008 c = buf;
1009 private1 = &normal_private;
1010 }
1011
1012 fn(helper_mode, lp_ctx, c, length, private1, mux_id, private2);
1013 talloc_free(buf);
1014 }
1015
1016 static void squid_stream(struct loadparm_context *lp_ctx,
1017 enum stdio_helper_mode stdio_mode,
1018 stdio_helper_function fn) {
1019 /* initialize FDescs */
1020 x_setbuf(x_stdout, NULL);
1021 x_setbuf(x_stderr, NULL);
1022 while(1) {
1023 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1024 }
1025 }
1026
1027
1028 /* Main program */
1029
1030 enum {
1031 OPT_USERNAME = 1000,
1032 OPT_DOMAIN,
1033 OPT_WORKSTATION,
1034 OPT_CHALLENGE,
1035 OPT_RESPONSE,
1036 OPT_LM,
1037 OPT_NT,
1038 OPT_PASSWORD,
1039 OPT_LM_KEY,
1040 OPT_USER_SESSION_KEY,
1041 OPT_DIAGNOSTICS,
1042 OPT_REQUIRE_MEMBERSHIP,
1043 OPT_MULTIPLEX,
1044 OPT_USE_CACHED_CREDS,
1045 };
1046
1047 int main(int argc, const char **argv)
1048 {
1049 static const char *helper_protocol;
1050 int opt;
1051
1052 poptContext pc;
1053
1054 /* NOTE: DO NOT change this interface without considering the implications!
1055 This is an external interface, which other programs will use to interact
1056 with this helper.
1057 */
1058
1059 /* We do not use single-letter command abbreviations, because they harm future
1060 interface stability. */
1061
1062 struct poptOption long_options[] = {
1063 POPT_AUTOHELP
1064 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1065 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1066 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1067 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1068 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1069 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1070 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1071 POPT_COMMON_SAMBA
1072 POPT_COMMON_VERSION
1073 { NULL }
1074 };
1075
1076 /* Samba client initialisation */
1077
1078 setup_logging(NULL, DEBUG_STDERR);
1079
1080 /* Parse options */
1081
1082 pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1083
1084 /* Parse command line options */
1085
1086 if (argc == 1) {
1087 poptPrintHelp(pc, stderr, 0);
1088 return 1;
1089 }
1090
1091 pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1092 POPT_CONTEXT_KEEP_FIRST);
1093
1094 while((opt = poptGetNextOpt(pc)) != -1) {
1095 if (opt < -1) {
1096 break;
1097 }
1098 }
1099 if (opt < -1) {
1100 fprintf(stderr, "%s: %s\n",
1101 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1102 poptStrerror(opt));
1103 return 1;
1104 }
1105
1106 gensec_init();
1107
1108 if (opt_domain == NULL) {
1109 opt_domain = lpcfg_workgroup(cmdline_lp_ctx);
1110 }
1111
1112 if (helper_protocol) {
1113 int i;
1114 for (i=0; i<NUM_HELPER_MODES; i++) {
1115 if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1116 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1117 exit(0);
1118 }
1119 }
1120 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1121
1122 for (i=0; i<NUM_HELPER_MODES; i++) {
1123 x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1124 }
1125
1126 exit(1);
1127 }
1128
1129 if (!opt_username) {
1130 x_fprintf(x_stderr, "username must be specified!\n\n");
1131 poptPrintHelp(pc, stderr, 0);
1132 exit(1);
1133 }
1134
1135 if (opt_workstation == NULL) {
1136 opt_workstation = lpcfg_netbios_name(cmdline_lp_ctx);
1137 }
1138
1139 if (!opt_password) {
1140 opt_password = getpass("password: ");
1141 }
1142
1143 {
1144 char *user;
1145
1146 if (asprintf(&user, "%s%c%s", opt_domain,
1147 *lpcfg_winbind_separator(cmdline_lp_ctx),
1148 opt_username) < 0) {
1149 return 1;
1150 }
1151 if (!check_plaintext_auth(user, opt_password, true)) {
1152 return 1;
1153 }
1154 }
1155
1156 /* Exit code */
1157
1158 poptFreeContext(pc);
1159 return 0;
1160 }
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