source: vendor/3.5.0/source4/utils/ntlm_auth.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 31.5 KB
Line 
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 "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
44enum 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
59typedef 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
64static 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
69static 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
74static 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
79static void manage_squid_request(struct loadparm_context *lp_ctx,
80 enum stdio_helper_mode helper_mode,
81 stdio_helper_function fn, void **private2);
82
83static 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
98extern int winbindd_fd;
99
100static const char *opt_username;
101static const char *opt_domain;
102static const char *opt_workstation;
103static const char *opt_password;
104static int opt_multiplex;
105static int use_cached_creds;
106
107
108static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
109
110static 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
128static 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 * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
147 **/
148static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
149{
150 DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
151 ret.length = ldb_base64_decode((char *)ret.data);
152 return ret;
153}
154
155/**
156 * Encode a base64 string into a talloc()ed string caller to free.
157 **/
158static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
159{
160 return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
161}
162
163/**
164 * Decode a base64 string in-place - wrapper for the above
165 **/
166static void base64_decode_inplace(char *s)
167{
168 ldb_base64_decode(s);
169}
170
171
172
173/* Authenticate a user with a plaintext password */
174
175static bool check_plaintext_auth(const char *user, const char *pass,
176 bool stdout_diagnostics)
177{
178 return (strcmp(pass, opt_password) == 0);
179}
180
181/* authenticate a user with an encrypted username/password */
182
183static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
184 const char *username,
185 const char *domain,
186 const char *workstation,
187 const DATA_BLOB *challenge,
188 const DATA_BLOB *lm_response,
189 const DATA_BLOB *nt_response,
190 uint32_t flags,
191 DATA_BLOB *lm_session_key,
192 DATA_BLOB *user_session_key,
193 char **error_string,
194 char **unix_name)
195{
196 NTSTATUS nt_status;
197 struct samr_Password lm_pw, nt_pw;
198 struct samr_Password *lm_pwd, *nt_pwd;
199 TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
200 if (!mem_ctx) {
201 nt_status = NT_STATUS_NO_MEMORY;
202 } else {
203
204 E_md4hash(opt_password, nt_pw.hash);
205 if (E_deshash(opt_password, lm_pw.hash)) {
206 lm_pwd = &lm_pw;
207 } else {
208 lm_pwd = NULL;
209 }
210 nt_pwd = &nt_pw;
211
212
213 nt_status = ntlm_password_check(mem_ctx,
214 lp_lanman_auth(lp_ctx),
215 lp_ntlm_auth(lp_ctx),
216 MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT |
217 MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT,
218 challenge,
219 lm_response,
220 nt_response,
221 username,
222 username,
223 domain,
224 lm_pwd, nt_pwd, user_session_key, lm_session_key);
225
226 if (NT_STATUS_IS_OK(nt_status)) {
227 if (unix_name) {
228 asprintf(unix_name,
229 "%s%c%s", domain,
230 *lp_winbind_separator(lp_ctx),
231 username);
232 }
233 } else {
234 DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
235 domain, username, workstation,
236 nt_errstr(nt_status)));
237 }
238 talloc_free(mem_ctx);
239 }
240 if (error_string) {
241 *error_string = strdup(nt_errstr(nt_status));
242 }
243 return nt_status;
244
245
246}
247
248static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
249 struct loadparm_context *lp_ctx,
250 char *buf, int length, void **private1,
251 unsigned int mux_id, void **private2)
252{
253 char *user, *pass;
254 user=buf;
255
256 pass = memchr(buf, ' ', length);
257 if (!pass) {
258 DEBUG(2, ("Password not found. Denying access\n"));
259 mux_printf(mux_id, "ERR\n");
260 return;
261 }
262 *pass='\0';
263 pass++;
264
265 if (stdio_helper_mode == SQUID_2_5_BASIC) {
266 rfc1738_unescape(user);
267 rfc1738_unescape(pass);
268 }
269
270 if (check_plaintext_auth(user, pass, false)) {
271 mux_printf(mux_id, "OK\n");
272 } else {
273 mux_printf(mux_id, "ERR\n");
274 }
275}
276
277/* This is a bit hairy, but the basic idea is to do a password callback
278 to the calling application. The callback comes from within gensec */
279
280static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
281 struct loadparm_context *lp_ctx,
282 char *buf, int length, void **private1,
283 unsigned int mux_id, void **password)
284{
285 DATA_BLOB in;
286 if (strlen(buf) < 2) {
287 DEBUG(1, ("query [%s] invalid", buf));
288 mux_printf(mux_id, "BH Query invalid\n");
289 return;
290 }
291
292 if (strlen(buf) > 3) {
293 in = base64_decode_data_blob(NULL, buf + 3);
294 } else {
295 in = data_blob(NULL, 0);
296 }
297
298 if (strncmp(buf, "PW ", 3) == 0) {
299
300 *password = talloc_strndup(*private1 /* hopefully the right gensec context, useful to use for talloc */,
301 (const char *)in.data, in.length);
302
303 if (*password == NULL) {
304 DEBUG(1, ("Out of memory\n"));
305 mux_printf(mux_id, "BH Out of memory\n");
306 data_blob_free(&in);
307 return;
308 }
309
310 mux_printf(mux_id, "OK\n");
311 data_blob_free(&in);
312 return;
313 }
314 DEBUG(1, ("Asked for (and expected) a password\n"));
315 mux_printf(mux_id, "BH Expected a password\n");
316 data_blob_free(&in);
317}
318
319/**
320 * Callback for password credentials. This is not async, and when
321 * GENSEC and the credentials code is made async, it will look rather
322 * different.
323 */
324
325static const char *get_password(struct cli_credentials *credentials)
326{
327 char *password = NULL;
328
329 /* Ask for a password */
330 mux_printf((unsigned int)(uintptr_t)credentials->priv_data, "PW\n");
331 credentials->priv_data = NULL;
332
333 manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
334 return password;
335}
336
337/**
338 Check if a string is part of a list.
339**/
340static bool in_list(const char *s, const char *list, bool casesensitive)
341{
342 char *tok;
343 size_t tok_len = 1024;
344 const char *p=list;
345
346 if (!list)
347 return false;
348
349 tok = (char *)malloc(tok_len);
350 if (!tok) {
351 return false;
352 }
353
354 while (next_token(&p, tok, LIST_SEP, tok_len)) {
355 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) {
356 free(tok);
357 return true;
358 }
359 }
360 free(tok);
361 return false;
362}
363
364static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
365{
366 if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
367 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
368 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
369 }
370 if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
371 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
372 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
373 }
374 if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
375 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
376 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
377 }
378}
379
380static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
381 struct loadparm_context *lp_ctx,
382 char *buf, int length, void **private1,
383 unsigned int mux_id, void **private2)
384{
385 DATA_BLOB in;
386 DATA_BLOB out = data_blob(NULL, 0);
387 char *out_base64 = NULL;
388 const char *reply_arg = NULL;
389 struct gensec_ntlm_state {
390 struct gensec_security *gensec_state;
391 const char *set_password;
392 };
393 struct gensec_ntlm_state *state;
394 struct tevent_context *ev;
395 struct messaging_context *msg;
396
397 NTSTATUS nt_status;
398 bool first = false;
399 const char *reply_code;
400 struct cli_credentials *creds;
401
402 static char *want_feature_list = NULL;
403 static DATA_BLOB session_key;
404
405 TALLOC_CTX *mem_ctx;
406
407 if (*private1) {
408 state = (struct gensec_ntlm_state *)*private1;
409 } else {
410 state = talloc_zero(NULL, struct gensec_ntlm_state);
411 if (!state) {
412 mux_printf(mux_id, "BH No Memory\n");
413 exit(1);
414 }
415 *private1 = state;
416 if (opt_password) {
417 state->set_password = opt_password;
418 }
419 }
420
421 if (strlen(buf) < 2) {
422 DEBUG(1, ("query [%s] invalid", buf));
423 mux_printf(mux_id, "BH Query invalid\n");
424 return;
425 }
426
427 if (strlen(buf) > 3) {
428 if(strncmp(buf, "SF ", 3) == 0) {
429 DEBUG(10, ("Setting flags to negotiate\n"));
430 talloc_free(want_feature_list);
431 want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
432 mux_printf(mux_id, "OK\n");
433 return;
434 }
435 in = base64_decode_data_blob(NULL, buf + 3);
436 } else {
437 in = data_blob(NULL, 0);
438 }
439
440 if (strncmp(buf, "YR", 2) == 0) {
441 if (state->gensec_state) {
442 talloc_free(state->gensec_state);
443 state->gensec_state = NULL;
444 }
445 } else if ( (strncmp(buf, "OK", 2) == 0)) {
446 /* Just return BH, like ntlm_auth from Samba 3 does. */
447 mux_printf(mux_id, "BH Command expected\n");
448 data_blob_free(&in);
449 return;
450 } else if ( (strncmp(buf, "TT ", 3) != 0) &&
451 (strncmp(buf, "KK ", 3) != 0) &&
452 (strncmp(buf, "AF ", 3) != 0) &&
453 (strncmp(buf, "NA ", 3) != 0) &&
454 (strncmp(buf, "UG", 2) != 0) &&
455 (strncmp(buf, "PW ", 3) != 0) &&
456 (strncmp(buf, "GK", 2) != 0) &&
457 (strncmp(buf, "GF", 2) != 0)) {
458 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
459 mux_printf(mux_id, "BH SPNEGO request invalid\n");
460 data_blob_free(&in);
461 return;
462 }
463
464 ev = s4_event_context_init(state);
465 if (!ev) {
466 exit(1);
467 }
468
469 mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
470
471 /* setup gensec */
472 if (!(state->gensec_state)) {
473 switch (stdio_helper_mode) {
474 case GSS_SPNEGO_CLIENT:
475 case NTLMSSP_CLIENT_1:
476 /* setup the client side */
477
478 nt_status = gensec_client_start(NULL, &state->gensec_state, ev,
479 lp_gensec_settings(NULL, lp_ctx));
480 if (!NT_STATUS_IS_OK(nt_status)) {
481 talloc_free(mem_ctx);
482 exit(1);
483 }
484
485 break;
486 case GSS_SPNEGO_SERVER:
487 case SQUID_2_5_NTLMSSP:
488 {
489 const char *winbind_method[] = { "winbind", NULL };
490 struct auth_context *auth_context;
491
492 msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx),
493 lp_iconv_convenience(lp_ctx), ev);
494 if (!msg) {
495 talloc_free(mem_ctx);
496 exit(1);
497 }
498 nt_status = auth_context_create_methods(mem_ctx,
499 winbind_method,
500 ev,
501 msg,
502 lp_ctx,
503 &auth_context);
504
505 if (!NT_STATUS_IS_OK(nt_status)) {
506 talloc_free(mem_ctx);
507 exit(1);
508 }
509
510 if (!NT_STATUS_IS_OK(gensec_server_start(state, ev,
511 lp_gensec_settings(state, lp_ctx),
512 auth_context, &state->gensec_state))) {
513 talloc_free(mem_ctx);
514 exit(1);
515 }
516 break;
517 }
518 default:
519 talloc_free(mem_ctx);
520 abort();
521 }
522
523 creds = cli_credentials_init(state->gensec_state);
524 cli_credentials_set_conf(creds, lp_ctx);
525 if (opt_username) {
526 cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
527 }
528 if (opt_domain) {
529 cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
530 }
531 if (state->set_password) {
532 cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
533 } else {
534 cli_credentials_set_password_callback(creds, get_password);
535 creds->priv_data = (void*)(uintptr_t)mux_id;
536 }
537 if (opt_workstation) {
538 cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
539 }
540
541 switch (stdio_helper_mode) {
542 case GSS_SPNEGO_SERVER:
543 case SQUID_2_5_NTLMSSP:
544 cli_credentials_set_machine_account(creds, lp_ctx);
545 break;
546 default:
547 break;
548 }
549
550 gensec_set_credentials(state->gensec_state, creds);
551 gensec_want_feature_list(state->gensec_state, want_feature_list);
552
553 switch (stdio_helper_mode) {
554 case GSS_SPNEGO_CLIENT:
555 case GSS_SPNEGO_SERVER:
556 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
557 if (!in.length) {
558 first = true;
559 }
560 break;
561 case NTLMSSP_CLIENT_1:
562 if (!in.length) {
563 first = true;
564 }
565 /* fall through */
566 case SQUID_2_5_NTLMSSP:
567 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
568 break;
569 default:
570 talloc_free(mem_ctx);
571 abort();
572 }
573
574 if (!NT_STATUS_IS_OK(nt_status)) {
575 DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
576 mux_printf(mux_id, "BH GENSEC mech failed to start\n");
577 talloc_free(mem_ctx);
578 return;
579 }
580
581 }
582
583 /* update */
584
585 if (strncmp(buf, "PW ", 3) == 0) {
586 state->set_password = talloc_strndup(state,
587 (const char *)in.data,
588 in.length);
589
590 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
591 state->set_password,
592 CRED_SPECIFIED);
593 mux_printf(mux_id, "OK\n");
594 data_blob_free(&in);
595 talloc_free(mem_ctx);
596 return;
597 }
598
599 if (strncmp(buf, "UG", 2) == 0) {
600 int i;
601 char *grouplist = NULL;
602 struct auth_session_info *session_info;
603
604 nt_status = gensec_session_info(state->gensec_state, &session_info);
605 if (!NT_STATUS_IS_OK(nt_status)) {
606 DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
607 mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
608 data_blob_free(&in);
609 talloc_free(mem_ctx);
610 return;
611 }
612
613 /* get the string onto the context */
614 grouplist = talloc_strdup(mem_ctx, "");
615
616 for (i=0; i<session_info->security_token->num_sids; i++) {
617 struct security_token *token = session_info->security_token;
618 const char *sidstr = dom_sid_string(session_info,
619 token->sids[i]);
620 grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
621 }
622
623 mux_printf(mux_id, "GL %s\n", grouplist);
624 talloc_free(session_info);
625 data_blob_free(&in);
626 talloc_free(mem_ctx);
627 return;
628 }
629
630 if (strncmp(buf, "GK", 2) == 0) {
631 char *base64_key;
632 DEBUG(10, ("Requested session key\n"));
633 nt_status = gensec_session_key(state->gensec_state, &session_key);
634 if(!NT_STATUS_IS_OK(nt_status)) {
635 DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
636 mux_printf(mux_id, "BH No session key\n");
637 talloc_free(mem_ctx);
638 return;
639 } else {
640 base64_key = base64_encode_data_blob(state, session_key);
641 mux_printf(mux_id, "GK %s\n", base64_key);
642 talloc_free(base64_key);
643 }
644 talloc_free(mem_ctx);
645 return;
646 }
647
648 if (strncmp(buf, "GF", 2) == 0) {
649 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
650 uint32_t neg_flags;
651
652 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
653 struct gensec_ntlmssp_state);
654 neg_flags = gensec_ntlmssp_state->neg_flags;
655
656 DEBUG(10, ("Requested negotiated feature flags\n"));
657 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
658 return;
659 }
660
661 nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
662
663 /* don't leak 'bad password'/'no such user' info to the network client */
664 nt_status = auth_nt_status_squash(nt_status);
665
666 if (out.length) {
667 out_base64 = base64_encode_data_blob(mem_ctx, out);
668 } else {
669 out_base64 = NULL;
670 }
671
672 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
673 reply_arg = "*";
674 if (first) {
675 reply_code = "YR";
676 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
677 reply_code = "KK";
678 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
679 reply_code = "TT";
680 } else {
681 abort();
682 }
683
684
685 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
686 reply_code = "BH NT_STATUS_ACCESS_DENIED";
687 reply_arg = nt_errstr(nt_status);
688 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
689 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
690 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
691 reply_arg = nt_errstr(nt_status);
692 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
693 } else if (!NT_STATUS_IS_OK(nt_status)) {
694 reply_code = "NA";
695 reply_arg = nt_errstr(nt_status);
696 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
697 } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
698 struct auth_session_info *session_info;
699
700 nt_status = gensec_session_info(state->gensec_state, &session_info);
701 if (!NT_STATUS_IS_OK(nt_status)) {
702 reply_code = "BH Failed to retrive session info";
703 reply_arg = nt_errstr(nt_status);
704 DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
705 } else {
706
707 reply_code = "AF";
708 reply_arg = talloc_asprintf(state->gensec_state,
709 "%s%s%s", session_info->server_info->domain_name,
710 lp_winbind_separator(lp_ctx), session_info->server_info->account_name);
711 talloc_free(session_info);
712 }
713 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
714 reply_code = "AF";
715 reply_arg = out_base64;
716 } else {
717 abort();
718 }
719
720 switch (stdio_helper_mode) {
721 case GSS_SPNEGO_SERVER:
722 mux_printf(mux_id, "%s %s %s\n", reply_code,
723 out_base64 ? out_base64 : "*",
724 reply_arg ? reply_arg : "*");
725 break;
726 default:
727 if (out_base64) {
728 mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
729 } else if (reply_arg) {
730 mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
731 } else {
732 mux_printf(mux_id, "%s\n", reply_code);
733 }
734 }
735
736 talloc_free(mem_ctx);
737 return;
738}
739
740static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
741 struct loadparm_context *lp_ctx,
742 char *buf, int length, void **private1,
743 unsigned int mux_id, void **private2)
744{
745 char *request, *parameter;
746 static DATA_BLOB challenge;
747 static DATA_BLOB lm_response;
748 static DATA_BLOB nt_response;
749 static char *full_username;
750 static char *username;
751 static char *domain;
752 static char *plaintext_password;
753 static bool ntlm_server_1_user_session_key;
754 static bool ntlm_server_1_lm_session_key;
755
756 if (strequal(buf, ".")) {
757 if (!full_username && !username) {
758 mux_printf(mux_id, "Error: No username supplied!\n");
759 } else if (plaintext_password) {
760 /* handle this request as plaintext */
761 if (!full_username) {
762 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username) == -1) {
763 mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
764 return;
765 }
766 }
767 if (check_plaintext_auth(full_username, plaintext_password, false)) {
768 mux_printf(mux_id, "Authenticated: Yes\n");
769 } else {
770 mux_printf(mux_id, "Authenticated: No\n");
771 }
772 } else if (!lm_response.data && !nt_response.data) {
773 mux_printf(mux_id, "Error: No password supplied!\n");
774 } else if (!challenge.data) {
775 mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
776 } else {
777 char *error_string = NULL;
778 DATA_BLOB lm_key;
779 DATA_BLOB user_session_key;
780 uint32_t flags = 0;
781
782 if (full_username && !username) {
783 SAFE_FREE(username);
784 SAFE_FREE(domain);
785 if (!parse_ntlm_auth_domain_user(full_username, &username,
786 &domain,
787 *lp_winbind_separator(lp_ctx))) {
788 /* username might be 'tainted', don't print into our new-line deleimianted stream */
789 mux_printf(mux_id, "Error: Could not parse into domain and username\n");
790 }
791 }
792
793 if (!domain) {
794 domain = smb_xstrdup(lp_workgroup(lp_ctx));
795 }
796
797 if (ntlm_server_1_lm_session_key)
798 flags |= NTLM_AUTH_FLAG_LMKEY;
799
800 if (ntlm_server_1_user_session_key)
801 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
802
803 if (!NT_STATUS_IS_OK(
804 local_pw_check_specified(lp_ctx,
805 username,
806 domain,
807 lp_netbios_name(lp_ctx),
808 &challenge,
809 &lm_response,
810 &nt_response,
811 flags,
812 &lm_key,
813 &user_session_key,
814 &error_string,
815 NULL))) {
816
817 mux_printf(mux_id, "Authenticated: No\n");
818 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
819 SAFE_FREE(error_string);
820 } else {
821 static char zeros[16];
822 char *hex_lm_key;
823 char *hex_user_session_key;
824
825 mux_printf(mux_id, "Authenticated: Yes\n");
826
827 if (ntlm_server_1_lm_session_key
828 && lm_key.length
829 && (memcmp(zeros, lm_key.data,
830 lm_key.length) != 0)) {
831 hex_encode(lm_key.data,
832 lm_key.length,
833 &hex_lm_key);
834 mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
835 SAFE_FREE(hex_lm_key);
836 }
837
838 if (ntlm_server_1_user_session_key
839 && user_session_key.length
840 && (memcmp(zeros, user_session_key.data,
841 user_session_key.length) != 0)) {
842 hex_encode(user_session_key.data,
843 user_session_key.length,
844 &hex_user_session_key);
845 mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
846 SAFE_FREE(hex_user_session_key);
847 }
848 }
849 }
850 /* clear out the state */
851 challenge = data_blob(NULL, 0);
852 nt_response = data_blob(NULL, 0);
853 lm_response = data_blob(NULL, 0);
854 SAFE_FREE(full_username);
855 SAFE_FREE(username);
856 SAFE_FREE(domain);
857 SAFE_FREE(plaintext_password);
858 ntlm_server_1_user_session_key = false;
859 ntlm_server_1_lm_session_key = false;
860 mux_printf(mux_id, ".\n");
861
862 return;
863 }
864
865 request = buf;
866
867 /* Indicates a base64 encoded structure */
868 parameter = strstr(request, ":: ");
869 if (!parameter) {
870 parameter = strstr(request, ": ");
871
872 if (!parameter) {
873 DEBUG(0, ("Parameter not found!\n"));
874 mux_printf(mux_id, "Error: Parameter not found!\n.\n");
875 return;
876 }
877
878 parameter[0] ='\0';
879 parameter++;
880 parameter[0] ='\0';
881 parameter++;
882
883 } else {
884 parameter[0] ='\0';
885 parameter++;
886 parameter[0] ='\0';
887 parameter++;
888 parameter[0] ='\0';
889 parameter++;
890
891 base64_decode_inplace(parameter);
892 }
893
894 if (strequal(request, "LANMAN-Challenge")) {
895 challenge = strhex_to_data_blob(NULL, parameter);
896 if (challenge.length != 8) {
897 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
898 parameter,
899 (int)challenge.length);
900 challenge = data_blob(NULL, 0);
901 }
902 } else if (strequal(request, "NT-Response")) {
903 nt_response = strhex_to_data_blob(NULL, parameter);
904 if (nt_response.length < 24) {
905 mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
906 parameter,
907 (int)nt_response.length);
908 nt_response = data_blob(NULL, 0);
909 }
910 } else if (strequal(request, "LANMAN-Response")) {
911 lm_response = strhex_to_data_blob(NULL, parameter);
912 if (lm_response.length != 24) {
913 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
914 parameter,
915 (int)lm_response.length);
916 lm_response = data_blob(NULL, 0);
917 }
918 } else if (strequal(request, "Password")) {
919 plaintext_password = smb_xstrdup(parameter);
920 } else if (strequal(request, "NT-Domain")) {
921 domain = smb_xstrdup(parameter);
922 } else if (strequal(request, "Username")) {
923 username = smb_xstrdup(parameter);
924 } else if (strequal(request, "Full-Username")) {
925 full_username = smb_xstrdup(parameter);
926 } else if (strequal(request, "Request-User-Session-Key")) {
927 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
928 } else if (strequal(request, "Request-LanMan-Session-Key")) {
929 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
930 } else {
931 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
932 }
933}
934
935static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
936 stdio_helper_function fn, void **private2)
937{
938 char *buf;
939 char tmp[INITIAL_BUFFER_SIZE+1];
940 unsigned int mux_id = 0;
941 int length, buf_size = 0;
942 char *c;
943 struct mux_private {
944 unsigned int max_mux;
945 void **private_pointers;
946 };
947
948 static struct mux_private *mux_private;
949 static void *normal_private;
950 void **private1;
951
952 buf = talloc_strdup(NULL, "");
953
954 if (buf == NULL) {
955 DEBUG(0, ("Failed to allocate memory for reading the input "
956 "buffer.\n"));
957 x_fprintf(x_stdout, "ERR\n");
958 return;
959 }
960
961 do {
962 /* this is not a typo - x_fgets doesn't work too well under
963 * squid */
964 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
965 if (ferror(stdin)) {
966 DEBUG(1, ("fgets() failed! dying..... errno=%d "
967 "(%s)\n", ferror(stdin),
968 strerror(ferror(stdin))));
969
970 exit(1); /* BIIG buffer */
971 }
972 exit(0);
973 }
974
975 buf = talloc_strdup_append_buffer(buf, tmp);
976 buf_size += INITIAL_BUFFER_SIZE;
977
978 if (buf_size > MAX_BUFFER_SIZE) {
979 DEBUG(0, ("Invalid Request (too large)\n"));
980 x_fprintf(x_stdout, "ERR\n");
981 talloc_free(buf);
982 return;
983 }
984
985 c = strchr(buf, '\n');
986 } while (c == NULL);
987
988 *c = '\0';
989 length = c-buf;
990
991 DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
992
993 if (buf[0] == '\0') {
994 DEBUG(0, ("Invalid Request (empty)\n"));
995 x_fprintf(x_stdout, "ERR\n");
996 talloc_free(buf);
997 return;
998 }
999
1000 if (opt_multiplex) {
1001 if (sscanf(buf, "%u ", &mux_id) != 1) {
1002 DEBUG(0, ("Invalid Request - no multiplex id\n"));
1003 x_fprintf(x_stdout, "ERR\n");
1004 talloc_free(buf);
1005 return;
1006 }
1007 if (!mux_private) {
1008 mux_private = talloc(NULL, struct mux_private);
1009 mux_private->max_mux = 0;
1010 mux_private->private_pointers = NULL;
1011 }
1012
1013 c=strchr(buf,' ');
1014 if (!c) {
1015 DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
1016 x_fprintf(x_stdout, "ERR\n");
1017 talloc_free(buf);
1018 return;
1019 }
1020 c++;
1021 if (mux_id >= mux_private->max_mux) {
1022 unsigned int prev_max = mux_private->max_mux;
1023 mux_private->max_mux = mux_id + 1;
1024 mux_private->private_pointers
1025 = talloc_realloc(mux_private,
1026 mux_private->private_pointers,
1027 void *, mux_private->max_mux);
1028 memset(&mux_private->private_pointers[prev_max], '\0',
1029 (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
1030 };
1031
1032 private1 = &mux_private->private_pointers[mux_id];
1033 } else {
1034 c = buf;
1035 private1 = &normal_private;
1036 }
1037
1038 fn(helper_mode, lp_ctx, c, length, private1, mux_id, private2);
1039 talloc_free(buf);
1040}
1041
1042static void squid_stream(struct loadparm_context *lp_ctx,
1043 enum stdio_helper_mode stdio_mode,
1044 stdio_helper_function fn) {
1045 /* initialize FDescs */
1046 x_setbuf(x_stdout, NULL);
1047 x_setbuf(x_stderr, NULL);
1048 while(1) {
1049 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1050 }
1051}
1052
1053
1054/* Main program */
1055
1056enum {
1057 OPT_USERNAME = 1000,
1058 OPT_DOMAIN,
1059 OPT_WORKSTATION,
1060 OPT_CHALLENGE,
1061 OPT_RESPONSE,
1062 OPT_LM,
1063 OPT_NT,
1064 OPT_PASSWORD,
1065 OPT_LM_KEY,
1066 OPT_USER_SESSION_KEY,
1067 OPT_DIAGNOSTICS,
1068 OPT_REQUIRE_MEMBERSHIP,
1069 OPT_MULTIPLEX,
1070 OPT_USE_CACHED_CREDS,
1071};
1072
1073int main(int argc, const char **argv)
1074{
1075 static const char *helper_protocol;
1076 int opt;
1077
1078 poptContext pc;
1079
1080 /* NOTE: DO NOT change this interface without considering the implications!
1081 This is an external interface, which other programs will use to interact
1082 with this helper.
1083 */
1084
1085 /* We do not use single-letter command abbreviations, because they harm future
1086 interface stability. */
1087
1088 struct poptOption long_options[] = {
1089 POPT_AUTOHELP
1090 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1091 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1092 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1093 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1094 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1095 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1096 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1097 POPT_COMMON_SAMBA
1098 POPT_COMMON_VERSION
1099 { NULL }
1100 };
1101
1102 /* Samba client initialisation */
1103
1104 setup_logging(NULL, DEBUG_STDERR);
1105
1106 /* Parse options */
1107
1108 pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1109
1110 /* Parse command line options */
1111
1112 if (argc == 1) {
1113 poptPrintHelp(pc, stderr, 0);
1114 return 1;
1115 }
1116
1117 pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1118 POPT_CONTEXT_KEEP_FIRST);
1119
1120 while((opt = poptGetNextOpt(pc)) != -1) {
1121 if (opt < -1) {
1122 break;
1123 }
1124 }
1125 if (opt < -1) {
1126 fprintf(stderr, "%s: %s\n",
1127 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1128 poptStrerror(opt));
1129 return 1;
1130 }
1131
1132 gensec_init(cmdline_lp_ctx);
1133
1134 if (opt_domain == NULL) {
1135 opt_domain = lp_workgroup(cmdline_lp_ctx);
1136 }
1137
1138 if (helper_protocol) {
1139 int i;
1140 for (i=0; i<NUM_HELPER_MODES; i++) {
1141 if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1142 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1143 exit(0);
1144 }
1145 }
1146 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1147
1148 for (i=0; i<NUM_HELPER_MODES; i++) {
1149 x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1150 }
1151
1152 exit(1);
1153 }
1154
1155 if (!opt_username) {
1156 x_fprintf(x_stderr, "username must be specified!\n\n");
1157 poptPrintHelp(pc, stderr, 0);
1158 exit(1);
1159 }
1160
1161 if (opt_workstation == NULL) {
1162 opt_workstation = lp_netbios_name(cmdline_lp_ctx);
1163 }
1164
1165 if (!opt_password) {
1166 opt_password = getpass("password: ");
1167 }
1168
1169 {
1170 char *user;
1171
1172 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username);
1173 if (!check_plaintext_auth(user, opt_password, true)) {
1174 return 1;
1175 }
1176 }
1177
1178 /* Exit code */
1179
1180 poptFreeContext(pc);
1181 return 0;
1182}
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