?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
The IRIX compiler does not like embedded unnamed unions
[Samba/gebeck_regimport.git] / source4 / utils / ntlm_auth.c
blob6a6302837e400a770647f8d7776221f985a100e1
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 "pstring.h"
35 #include "libcli/auth/libcli_auth.h"
36 #include "libcli/security/security.h"
37 #include "lib/events/events.h"
38 #include "lib/messaging/messaging.h"
39 #include "lib/messaging/irpc.h"
40 #include "auth/ntlmssp/ntlmssp.h"
41 #include "param/param.h"
42
43 #define INITIAL_BUFFER_SIZE 300
44 #define MAX_BUFFER_SIZE 63000
45
46 enum stdio_helper_mode {
47 SQUID_2_4_BASIC,
48 SQUID_2_5_BASIC,
49 SQUID_2_5_NTLMSSP,
50 NTLMSSP_CLIENT_1,
51 GSS_SPNEGO_CLIENT,
52 GSS_SPNEGO_SERVER,
53 NTLM_SERVER_1,
54 NUM_HELPER_MODES
55 };
56
57 #define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004
58 #define NTLM_AUTH_FLAG_LMKEY 0x0008
59
60
61 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
62 struct loadparm_context *lp_ctx,
63 char *buf, int length, void **private,
64 unsigned int mux_id, void **private2);
65
66 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
67 struct loadparm_context *lp_ctx,
68 char *buf, int length, void **private,
69 unsigned int mux_id, void **private2);
70
71 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
72 struct loadparm_context *lp_ctx,
73 char *buf, int length, void **private,
74 unsigned int mux_id, void **private2);
75
76 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
77 struct loadparm_context *lp_ctx,
78 char *buf, int length, void **private,
79 unsigned int mux_id, void **private2);
80
81 static void manage_squid_request(struct loadparm_context *lp_ctx,
82 enum stdio_helper_mode helper_mode,
83 stdio_helper_function fn, void **private2);
84
85 static const struct {
86 enum stdio_helper_mode mode;
87 const char *name;
88 stdio_helper_function fn;
89 } stdio_helper_protocols[] = {
90 { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
91 { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
92 { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
93 { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
94 { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
95 { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
96 { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
97 { NUM_HELPER_MODES, NULL, NULL}
98 };
99
100 extern int winbindd_fd;
101
102 static const char *opt_username;
103 static const char *opt_domain;
104 static const char *opt_workstation;
105 static const char *opt_password;
106 static int opt_multiplex;
107 static int use_cached_creds;
108
109
110 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
111
112 static void mux_printf(unsigned int mux_id, const char *format, ...)
113 {
114 va_list ap;
115
116 if (opt_multiplex) {
117 x_fprintf(x_stdout, "%d ", mux_id);
118 }
119
120 va_start(ap, format);
121 x_vfprintf(x_stdout, format, ap);
122 va_end(ap);
123 }
124
125
126
127 /* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
128 form DOMAIN/user into a domain and a user */
129
130 static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
131 fstring user, char winbind_separator)
132 {
133
134 char *p = strchr(domuser, winbind_separator);
135
136 if (!p) {
137 return false;
138 }
139
140 fstrcpy(user, p+1);
141 fstrcpy(domain, domuser);
142 domain[PTR_DIFF(p, domuser)] = 0;
143
144 return true;
145 }
146
147 /**
148 * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
149 **/
150 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
151 {
152 DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
153 ret.length = ldb_base64_decode((char *)ret.data);
154 return ret;
155 }
156
157 /**
158 * Encode a base64 string into a talloc()ed string caller to free.
159 **/
160 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
161 {
162 return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
163 }
164
165 /**
166 * Decode a base64 string in-place - wrapper for the above
167 **/
168 static void base64_decode_inplace(char *s)
169 {
170 ldb_base64_decode(s);
171 }
172
173
174
175 /* Authenticate a user with a plaintext password */
176
177 static bool check_plaintext_auth(const char *user, const char *pass,
178 bool stdout_diagnostics)
179 {
180 return (strcmp(pass, opt_password) == 0);
181 }
182
183 /* authenticate a user with an encrypted username/password */
184
185 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
186 const char *username,
187 const char *domain,
188 const char *workstation,
189 const DATA_BLOB *challenge,
190 const DATA_BLOB *lm_response,
191 const DATA_BLOB *nt_response,
192 uint32_t flags,
193 DATA_BLOB *lm_session_key,
194 DATA_BLOB *user_session_key,
195 char **error_string,
196 char **unix_name)
197 {
198 NTSTATUS nt_status;
199 struct samr_Password lm_pw, nt_pw;
200 struct samr_Password *lm_pwd, *nt_pwd;
201 TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
202 if (!mem_ctx) {
203 nt_status = NT_STATUS_NO_MEMORY;
204 } else {
205
206 E_md4hash(opt_password, nt_pw.hash);
207 if (E_deshash(opt_password, lm_pw.hash)) {
208 lm_pwd = &lm_pw;
209 } else {
210 lm_pwd = NULL;
211 }
212 nt_pwd = &nt_pw;
213
214
215 nt_status = ntlm_password_check(mem_ctx,
216 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 **private,
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 **private,
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(*private /* 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 **private,
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 event_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 (*private) {
409 state = (struct gensec_ntlm_state *)*private;
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 *private = 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, lp_ctx);
477 if (!NT_STATUS_IS_OK(nt_status)) {
478 exit(1);
479 }
480
481 break;
482 case GSS_SPNEGO_SERVER:
483 case SQUID_2_5_NTLMSSP:
484 msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx),
485 lp_iconv_convenience(lp_ctx), ev);
486 if (!msg) {
487 exit(1);
488 }
489 if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, lp_ctx, msg, &state->gensec_state))) {
490 exit(1);
491 }
492 break;
493 default:
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 abort();
545 }
546
547 if (!NT_STATUS_IS_OK(nt_status)) {
548 DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
549 mux_printf(mux_id, "BH GENSEC mech failed to start\n");
550 return;
551 }
552
553 }
554
555 /* update */
556 mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
557
558 if (strncmp(buf, "PW ", 3) == 0) {
559 state->set_password = talloc_strndup(state,
560 (const char *)in.data,
561 in.length);
562
563 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
564 state->set_password,
565 CRED_SPECIFIED);
566 mux_printf(mux_id, "OK\n");
567 data_blob_free(&in);
568 talloc_free(mem_ctx);
569 return;
570 }
571
572 if (strncmp(buf, "UG", 2) == 0) {
573 int i;
574 char *grouplist = NULL;
575 struct auth_session_info *session_info;
576
577 nt_status = gensec_session_info(state->gensec_state, &session_info);
578 if (!NT_STATUS_IS_OK(nt_status)) {
579 DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
580 mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
581 data_blob_free(&in);
582 talloc_free(mem_ctx);
583 return;
584 }
585
586 /* get the string onto the context */
587 grouplist = talloc_strdup(mem_ctx, "");
588
589 for (i=0; i<session_info->security_token->num_sids; i++) {
590 struct security_token *token = session_info->security_token;
591 const char *sidstr = dom_sid_string(session_info,
592 token->sids[i]);
593 grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
594 }
595
596 mux_printf(mux_id, "GL %s\n", grouplist);
597 talloc_free(session_info);
598 data_blob_free(&in);
599 talloc_free(mem_ctx);
600 return;
601 }
602
603 if (strncmp(buf, "GK", 2) == 0) {
604 char *base64_key;
605 DEBUG(10, ("Requested session key\n"));
606 nt_status = gensec_session_key(state->gensec_state, &session_key);
607 if(!NT_STATUS_IS_OK(nt_status)) {
608 DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
609 mux_printf(mux_id, "BH No session key\n");
610 talloc_free(mem_ctx);
611 return;
612 } else {
613 base64_key = base64_encode_data_blob(state, session_key);
614 mux_printf(mux_id, "GK %s\n", base64_key);
615 talloc_free(base64_key);
616 }
617 talloc_free(mem_ctx);
618 return;
619 }
620
621 if (strncmp(buf, "GF", 2) == 0) {
622 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
623 uint32_t neg_flags;
624
625 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
626 struct gensec_ntlmssp_state);
627 neg_flags = gensec_ntlmssp_state->neg_flags;
628
629 DEBUG(10, ("Requested negotiated feature flags\n"));
630 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
631 return;
632 }
633
634 nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
635
636 /* don't leak 'bad password'/'no such user' info to the network client */
637 nt_status = auth_nt_status_squash(nt_status);
638
639 if (out.length) {
640 out_base64 = base64_encode_data_blob(mem_ctx, out);
641 } else {
642 out_base64 = NULL;
643 }
644
645 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
646 reply_arg = "*";
647 if (first) {
648 reply_code = "YR";
649 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
650 reply_code = "KK";
651 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
652 reply_code = "TT";
653 } else {
654 abort();
655 }
656
657
658 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
659 reply_code = "BH NT_STATUS_ACCESS_DENIED";
660 reply_arg = nt_errstr(nt_status);
661 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
662 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
663 reply_code = "BH NT_STATUS_UNSUCCESSFUL";
664 reply_arg = nt_errstr(nt_status);
665 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
666 } else if (!NT_STATUS_IS_OK(nt_status)) {
667 reply_code = "NA";
668 reply_arg = nt_errstr(nt_status);
669 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
670 } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
671 struct auth_session_info *session_info;
672
673 nt_status = gensec_session_info(state->gensec_state, &session_info);
674 if (!NT_STATUS_IS_OK(nt_status)) {
675 reply_code = "BH Failed to retrive session info";
676 reply_arg = nt_errstr(nt_status);
677 DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
678 } else {
679
680 reply_code = "AF";
681 reply_arg = talloc_asprintf(state->gensec_state,
682 "%s%s%s", session_info->server_info->domain_name,
683 lp_winbind_separator(lp_ctx), session_info->server_info->account_name);
684 talloc_free(session_info);
685 }
686 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
687 reply_code = "AF";
688 reply_arg = out_base64;
689 } else {
690 abort();
691 }
692
693 switch (stdio_helper_mode) {
694 case GSS_SPNEGO_SERVER:
695 mux_printf(mux_id, "%s %s %s\n", reply_code,
696 out_base64 ? out_base64 : "*",
697 reply_arg ? reply_arg : "*");
698 break;
699 default:
700 if (out_base64) {
701 mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
702 } else if (reply_arg) {
703 mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
704 } else {
705 mux_printf(mux_id, "%s\n", reply_code);
706 }
707 }
708
709 talloc_free(mem_ctx);
710 return;
711 }
712
713 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
714 struct loadparm_context *lp_ctx,
715 char *buf, int length, void **private,
716 unsigned int mux_id, void **private2)
717 {
718 char *request, *parameter;
719 static DATA_BLOB challenge;
720 static DATA_BLOB lm_response;
721 static DATA_BLOB nt_response;
722 static char *full_username;
723 static char *username;
724 static char *domain;
725 static char *plaintext_password;
726 static bool ntlm_server_1_user_session_key;
727 static bool ntlm_server_1_lm_session_key;
728
729 if (strequal(buf, ".")) {
730 if (!full_username && !username) {
731 mux_printf(mux_id, "Error: No username supplied!\n");
732 } else if (plaintext_password) {
733 /* handle this request as plaintext */
734 if (!full_username) {
735 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username) == -1) {
736 mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
737 return;
738 }
739 }
740 if (check_plaintext_auth(full_username, plaintext_password, false)) {
741 mux_printf(mux_id, "Authenticated: Yes\n");
742 } else {
743 mux_printf(mux_id, "Authenticated: No\n");
744 }
745 } else if (!lm_response.data && !nt_response.data) {
746 mux_printf(mux_id, "Error: No password supplied!\n");
747 } else if (!challenge.data) {
748 mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
749 } else {
750 char *error_string = NULL;
751 DATA_BLOB lm_key;
752 DATA_BLOB user_session_key;
753 uint32_t flags = 0;
754
755 if (full_username && !username) {
756 fstring fstr_user;
757 fstring fstr_domain;
758
759 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain,
760 *lp_winbind_separator(lp_ctx))) {
761 /* username might be 'tainted', don't print into our new-line deleimianted stream */
762 mux_printf(mux_id, "Error: Could not parse into domain and username\n");
763 }
764 SAFE_FREE(username);
765 SAFE_FREE(domain);
766 username = smb_xstrdup(fstr_user);
767 domain = smb_xstrdup(fstr_domain);
768 }
769
770 if (!domain) {
771 domain = smb_xstrdup(lp_workgroup(lp_ctx));
772 }
773
774 if (ntlm_server_1_lm_session_key)
775 flags |= NTLM_AUTH_FLAG_LMKEY;
776
777 if (ntlm_server_1_user_session_key)
778 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
779
780 if (!NT_STATUS_IS_OK(
781 local_pw_check_specified(lp_ctx,
782 username,
783 domain,
784 lp_netbios_name(lp_ctx),
785 &challenge,
786 &lm_response,
787 &nt_response,
788 flags,
789 &lm_key,
790 &user_session_key,
791 &error_string,
792 NULL))) {
793
794 mux_printf(mux_id, "Authenticated: No\n");
795 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
796 SAFE_FREE(error_string);
797 } else {
798 static char zeros[16];
799 char *hex_lm_key;
800 char *hex_user_session_key;
801
802 mux_printf(mux_id, "Authenticated: Yes\n");
803
804 if (ntlm_server_1_lm_session_key
805 && lm_key.length
806 && (memcmp(zeros, lm_key.data,
807 lm_key.length) != 0)) {
808 hex_encode(lm_key.data,
809 lm_key.length,
810 &hex_lm_key);
811 mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
812 SAFE_FREE(hex_lm_key);
813 }
814
815 if (ntlm_server_1_user_session_key
816 && user_session_key.length
817 && (memcmp(zeros, user_session_key.data,
818 user_session_key.length) != 0)) {
819 hex_encode(user_session_key.data,
820 user_session_key.length,
821 &hex_user_session_key);
822 mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
823 SAFE_FREE(hex_user_session_key);
824 }
825 }
826 }
827 /* clear out the state */
828 challenge = data_blob(NULL, 0);
829 nt_response = data_blob(NULL, 0);
830 lm_response = data_blob(NULL, 0);
831 SAFE_FREE(full_username);
832 SAFE_FREE(username);
833 SAFE_FREE(domain);
834 SAFE_FREE(plaintext_password);
835 ntlm_server_1_user_session_key = false;
836 ntlm_server_1_lm_session_key = false;
837 mux_printf(mux_id, ".\n");
838
839 return;
840 }
841
842 request = buf;
843
844 /* Indicates a base64 encoded structure */
845 parameter = strstr(request, ":: ");
846 if (!parameter) {
847 parameter = strstr(request, ": ");
848
849 if (!parameter) {
850 DEBUG(0, ("Parameter not found!\n"));
851 mux_printf(mux_id, "Error: Parameter not found!\n.\n");
852 return;
853 }
854
855 parameter[0] ='\0';
856 parameter++;
857 parameter[0] ='\0';
858 parameter++;
859
860 } else {
861 parameter[0] ='\0';
862 parameter++;
863 parameter[0] ='\0';
864 parameter++;
865 parameter[0] ='\0';
866 parameter++;
867
868 base64_decode_inplace(parameter);
869 }
870
871 if (strequal(request, "LANMAN-Challenge")) {
872 challenge = strhex_to_data_blob(parameter);
873 if (challenge.length != 8) {
874 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
875 parameter,
876 (int)challenge.length);
877 challenge = data_blob(NULL, 0);
878 }
879 } else if (strequal(request, "NT-Response")) {
880 nt_response = strhex_to_data_blob(parameter);
881 if (nt_response.length < 24) {
882 mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
883 parameter,
884 (int)nt_response.length);
885 nt_response = data_blob(NULL, 0);
886 }
887 } else if (strequal(request, "LANMAN-Response")) {
888 lm_response = strhex_to_data_blob(parameter);
889 if (lm_response.length != 24) {
890 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
891 parameter,
892 (int)lm_response.length);
893 lm_response = data_blob(NULL, 0);
894 }
895 } else if (strequal(request, "Password")) {
896 plaintext_password = smb_xstrdup(parameter);
897 } else if (strequal(request, "NT-Domain")) {
898 domain = smb_xstrdup(parameter);
899 } else if (strequal(request, "Username")) {
900 username = smb_xstrdup(parameter);
901 } else if (strequal(request, "Full-Username")) {
902 full_username = smb_xstrdup(parameter);
903 } else if (strequal(request, "Request-User-Session-Key")) {
904 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
905 } else if (strequal(request, "Request-LanMan-Session-Key")) {
906 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
907 } else {
908 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
909 }
910 }
911
912 static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
913 stdio_helper_function fn, void **private2)
914 {
915 char *buf;
916 char tmp[INITIAL_BUFFER_SIZE+1];
917 unsigned int mux_id = 0;
918 int length, buf_size = 0;
919 char *c;
920 struct mux_private {
921 unsigned int max_mux;
922 void **private_pointers;
923 };
924
925 static struct mux_private *mux_private;
926 static void *normal_private;
927 void **private;
928
929 buf = talloc_strdup(NULL, "");
930
931 if (buf == NULL) {
932 DEBUG(0, ("Failed to allocate memory for reading the input "
933 "buffer.\n"));
934 x_fprintf(x_stdout, "ERR\n");
935 return;
936 }
937
938 do {
939 /* this is not a typo - x_fgets doesn't work too well under
940 * squid */
941 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
942 if (ferror(stdin)) {
943 DEBUG(1, ("fgets() failed! dying..... errno=%d "
944 "(%s)\n", ferror(stdin),
945 strerror(ferror(stdin))));
946
947 exit(1); /* BIIG buffer */
948 }
949 exit(0);
950 }
951
952 buf = talloc_strdup_append_buffer(buf, tmp);
953 buf_size += INITIAL_BUFFER_SIZE;
954
955 if (buf_size > MAX_BUFFER_SIZE) {
956 DEBUG(0, ("Invalid Request (too large)\n"));
957 x_fprintf(x_stdout, "ERR\n");
958 talloc_free(buf);
959 return;
960 }
961
962 c = strchr(buf, '\n');
963 } while (c == NULL);
964
965 *c = '\0';
966 length = c-buf;
967
968 DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
969
970 if (buf[0] == '\0') {
971 DEBUG(0, ("Invalid Request (empty)\n"));
972 x_fprintf(x_stdout, "ERR\n");
973 talloc_free(buf);
974 return;
975 }
976
977 if (opt_multiplex) {
978 if (sscanf(buf, "%u ", &mux_id) != 1) {
979 DEBUG(0, ("Invalid Request - no multiplex id\n"));
980 x_fprintf(x_stdout, "ERR\n");
981 talloc_free(buf);
982 return;
983 }
984 if (!mux_private) {
985 mux_private = talloc(NULL, struct mux_private);
986 mux_private->max_mux = 0;
987 mux_private->private_pointers = NULL;
988 }
989
990 c=strchr(buf,' ');
991 if (!c) {
992 DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
993 x_fprintf(x_stdout, "ERR\n");
994 talloc_free(buf);
995 return;
996 }
997 c++;
998 if (mux_id >= mux_private->max_mux) {
999 unsigned int prev_max = mux_private->max_mux;
1000 mux_private->max_mux = mux_id + 1;
1001 mux_private->private_pointers
1002 = talloc_realloc(mux_private,
1003 mux_private->private_pointers,
1004 void *, mux_private->max_mux);
1005 memset(&mux_private->private_pointers[prev_max], '\0',
1006 (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
1007 };
1008
1009 private = &mux_private->private_pointers[mux_id];
1010 } else {
1011 c = buf;
1012 private = &normal_private;
1013 }
1014
1015 fn(helper_mode, lp_ctx, c, length, private, mux_id, private2);
1016 talloc_free(buf);
1017 }
1018
1019 static void squid_stream(struct loadparm_context *lp_ctx,
1020 enum stdio_helper_mode stdio_mode,
1021 stdio_helper_function fn) {
1022 /* initialize FDescs */
1023 x_setbuf(x_stdout, NULL);
1024 x_setbuf(x_stderr, NULL);
1025 while(1) {
1026 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1027 }
1028 }
1029
1030
1031 /* Main program */
1032
1033 enum {
1034 OPT_USERNAME = 1000,
1035 OPT_DOMAIN,
1036 OPT_WORKSTATION,
1037 OPT_CHALLENGE,
1038 OPT_RESPONSE,
1039 OPT_LM,
1040 OPT_NT,
1041 OPT_PASSWORD,
1042 OPT_LM_KEY,
1043 OPT_USER_SESSION_KEY,
1044 OPT_DIAGNOSTICS,
1045 OPT_REQUIRE_MEMBERSHIP,
1046 OPT_MULTIPLEX,
1047 OPT_USE_CACHED_CREDS,
1048 };
1049
1050 int main(int argc, const char **argv)
1051 {
1052 static const char *helper_protocol;
1053 int opt;
1054
1055 poptContext pc;
1056
1057 /* NOTE: DO NOT change this interface without considering the implications!
1058 This is an external interface, which other programs will use to interact
1059 with this helper.
1060 */
1061
1062 /* We do not use single-letter command abbreviations, because they harm future
1063 interface stability. */
1064
1065 struct poptOption long_options[] = {
1066 POPT_AUTOHELP
1067 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1068 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1069 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1070 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1071 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1072 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1073 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1074 POPT_COMMON_SAMBA
1075 POPT_COMMON_VERSION
1076 { NULL }
1077 };
1078
1079 /* Samba client initialisation */
1080
1081 setup_logging(NULL, DEBUG_STDERR);
1082
1083 /* Parse options */
1084
1085 pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1086
1087 /* Parse command line options */
1088
1089 if (argc == 1) {
1090 poptPrintHelp(pc, stderr, 0);
1091 return 1;
1092 }
1093
1094 pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1095 POPT_CONTEXT_KEEP_FIRST);
1096
1097 while((opt = poptGetNextOpt(pc)) != -1) {
1098 if (opt < -1) {
1099 break;
1100 }
1101 }
1102 if (opt < -1) {
1103 fprintf(stderr, "%s: %s\n",
1104 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1105 poptStrerror(opt));
1106 return 1;
1107 }
1108
1109 gensec_init(cmdline_lp_ctx);
1110
1111 if (opt_domain == NULL) {
1112 opt_domain = lp_workgroup(cmdline_lp_ctx);
1113 }
1114
1115 if (helper_protocol) {
1116 int i;
1117 for (i=0; i<NUM_HELPER_MODES; i++) {
1118 if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1119 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1120 exit(0);
1121 }
1122 }
1123 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1124
1125 for (i=0; i<NUM_HELPER_MODES; i++) {
1126 x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1127 }
1128
1129 exit(1);
1130 }
1131
1132 if (!opt_username) {
1133 x_fprintf(x_stderr, "username must be specified!\n\n");
1134 poptPrintHelp(pc, stderr, 0);
1135 exit(1);
1136 }
1137
1138 if (opt_workstation == NULL) {
1139 opt_workstation = lp_netbios_name(cmdline_lp_ctx);
1140 }
1141
1142 if (!opt_password) {
1143 opt_password = getpass("password: ");
1144 }
1145
1146 {
1147 char *user;
1148
1149 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username);
1150 if (!check_plaintext_auth(user, opt_password, true)) {
1151 return 1;
1152 }
1153 }
1154
1155 /* Exit code */
1156
1157 poptFreeContext(pc);
1158 return 0;
1159 }
reg import