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r26441: Remove global_loadparm uses.
[Samba.git] / source / utils / ntlm_auth.c
blobb224689d7073b78429df45891e6b97724c63adf8
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 "pstring.h"
34 #include "libcli/auth/libcli_auth.h"
35 #include "libcli/security/security.h"
36 #include "lib/events/events.h"
37 #include "lib/messaging/messaging.h"
38 #include "lib/messaging/irpc.h"
39 #include "auth/ntlmssp/ntlmssp.h"
40 #include "param/param.h"
41
42 #define INITIAL_BUFFER_SIZE 300
43 #define MAX_BUFFER_SIZE 63000
44
45 enum stdio_helper_mode {
46 SQUID_2_4_BASIC,
47 SQUID_2_5_BASIC,
48 SQUID_2_5_NTLMSSP,
49 NTLMSSP_CLIENT_1,
50 GSS_SPNEGO_CLIENT,
51 GSS_SPNEGO_SERVER,
52 NTLM_SERVER_1,
53 NUM_HELPER_MODES
54 };
55
56 #define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004
57 #define NTLM_AUTH_FLAG_LMKEY 0x0008
58
59
60 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
61 struct loadparm_context *lp_ctx,
62 char *buf, int length, void **private,
63 unsigned int mux_id, void **private2);
64
65 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
66 struct loadparm_context *lp_ctx,
67 char *buf, int length, void **private,
68 unsigned int mux_id, void **private2);
69
70 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
71 struct loadparm_context *lp_ctx,
72 char *buf, int length, void **private,
73 unsigned int mux_id, void **private2);
74
75 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
76 struct loadparm_context *lp_ctx,
77 char *buf, int length, void **private,
78 unsigned int mux_id, void **private2);
79
80 static void manage_squid_request(struct loadparm_context *lp_ctx,
81 enum stdio_helper_mode helper_mode,
82 stdio_helper_function fn, void **private2);
83
84 static const struct {
85 enum stdio_helper_mode mode;
86 const char *name;
87 stdio_helper_function fn;
88 } stdio_helper_protocols[] = {
89 { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
90 { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
91 { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
92 { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
93 { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
94 { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
95 { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
96 { NUM_HELPER_MODES, NULL, NULL}
97 };
98
99 extern int winbindd_fd;
100
101 static const char *opt_username;
102 static const char *opt_domain;
103 static const char *opt_workstation;
104 static const char *opt_password;
105 static int opt_multiplex;
106 static int use_cached_creds;
107
108
109 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
110
111 static void mux_printf(unsigned int mux_id, const char *format, ...)
112 {
113 va_list ap;
114
115 if (opt_multiplex) {
116 x_fprintf(x_stdout, "%d ", mux_id);
117 }
118
119 va_start(ap, format);
120 x_vfprintf(x_stdout, format, ap);
121 va_end(ap);
122 }
123
124
125
126 /* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
127 form DOMAIN/user into a domain and a user */
128
129 static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
130 fstring user, char winbind_separator)
131 {
132
133 char *p = strchr(domuser, winbind_separator);
134
135 if (!p) {
136 return false;
137 }
138
139 fstrcpy(user, p+1);
140 fstrcpy(domain, domuser);
141 domain[PTR_DIFF(p, domuser)] = 0;
142
143 return true;
144 }
145
146 /**
147 * Decode a base64 string into a DATA_BLOB - simple and slow algorithm
148 **/
149 static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s)
150 {
151 DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1);
152 ret.length = ldb_base64_decode((char *)ret.data);
153 return ret;
154 }
155
156 /**
157 * Encode a base64 string into a talloc()ed string caller to free.
158 **/
159 static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data)
160 {
161 return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length);
162 }
163
164 /**
165 * Decode a base64 string in-place - wrapper for the above
166 **/
167 static void base64_decode_inplace(char *s)
168 {
169 ldb_base64_decode(s);
170 }
171
172
173
174 /* Authenticate a user with a plaintext password */
175
176 static bool check_plaintext_auth(const char *user, const char *pass,
177 bool stdout_diagnostics)
178 {
179 return (strcmp(pass, opt_password) == 0);
180 }
181
182 /* authenticate a user with an encrypted username/password */
183
184 static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx,
185 const char *username,
186 const char *domain,
187 const char *workstation,
188 const DATA_BLOB *challenge,
189 const DATA_BLOB *lm_response,
190 const DATA_BLOB *nt_response,
191 uint32_t flags,
192 DATA_BLOB *lm_session_key,
193 DATA_BLOB *user_session_key,
194 char **error_string,
195 char **unix_name)
196 {
197 NTSTATUS nt_status;
198 struct samr_Password lm_pw, nt_pw;
199 struct samr_Password *lm_pwd, *nt_pwd;
200 TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
201 if (!mem_ctx) {
202 nt_status = NT_STATUS_NO_MEMORY;
203 } else {
204
205 E_md4hash(opt_password, nt_pw.hash);
206 if (E_deshash(opt_password, lm_pw.hash)) {
207 lm_pwd = &lm_pw;
208 } else {
209 lm_pwd = NULL;
210 }
211 nt_pwd = &nt_pw;
212
213
214 nt_status = ntlm_password_check(mem_ctx,
215 lp_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
248 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
249 struct loadparm_context *lp_ctx,
250 char *buf, int length, void **private,
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
280 static 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 **private,
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\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(*private /* 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\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\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
325 static const char *get_password(struct cli_credentials *credentials)
326 {
327 char *password = NULL;
328
329 /* Ask for a password */
330 mux_printf((unsigned int)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 **/
340 static bool in_list(const char *s, const char *list, bool casesensitive)
341 {
342 pstring tok;
343 const char *p=list;
344
345 if (!list)
346 return false;
347
348 while (next_token(&p, tok, LIST_SEP, sizeof(tok))) {
349 if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0)
350 return true;
351 }
352 return false;
353 }
354
355 static void gensec_want_feature_list(struct gensec_security *state, char* feature_list)
356 {
357 if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) {
358 DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n"));
359 gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY);
360 }
361 if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) {
362 DEBUG(10, ("want GENSEC_FEATURE_SIGN\n"));
363 gensec_want_feature(state, GENSEC_FEATURE_SIGN);
364 }
365 if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) {
366 DEBUG(10, ("want GENSEC_FEATURE_SEAL\n"));
367 gensec_want_feature(state, GENSEC_FEATURE_SEAL);
368 }
369 }
370
371 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
372 struct loadparm_context *lp_ctx,
373 char *buf, int length, void **private,
374 unsigned int mux_id, void **private2)
375 {
376 DATA_BLOB in;
377 DATA_BLOB out = data_blob(NULL, 0);
378 char *out_base64 = NULL;
379 const char *reply_arg = NULL;
380 struct gensec_ntlm_state {
381 struct gensec_security *gensec_state;
382 const char *set_password;
383 };
384 struct gensec_ntlm_state *state;
385 struct event_context *ev;
386 struct messaging_context *msg;
387
388 NTSTATUS nt_status;
389 bool first = false;
390 const char *reply_code;
391 struct cli_credentials *creds;
392
393 static char *want_feature_list = NULL;
394 static DATA_BLOB session_key;
395
396 TALLOC_CTX *mem_ctx;
397
398 if (*private) {
399 state = (struct gensec_ntlm_state *)*private;
400 } else {
401 state = talloc_zero(NULL, struct gensec_ntlm_state);
402 if (!state) {
403 mux_printf(mux_id, "BH No Memory\n");
404 exit(1);
405 }
406 *private = state;
407 if (opt_password) {
408 state->set_password = opt_password;
409 }
410 }
411
412 if (strlen(buf) < 2) {
413 DEBUG(1, ("query [%s] invalid", buf));
414 mux_printf(mux_id, "BH\n");
415 return;
416 }
417
418 if (strlen(buf) > 3) {
419 if(strncmp(buf, "SF ", 3) == 0) {
420 DEBUG(10, ("Setting flags to negotiate\n"));
421 talloc_free(want_feature_list);
422 want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3);
423 mux_printf(mux_id, "OK\n");
424 return;
425 }
426 in = base64_decode_data_blob(NULL, buf + 3);
427 } else {
428 in = data_blob(NULL, 0);
429 }
430
431 if (strncmp(buf, "YR", 2) == 0) {
432 if (state->gensec_state) {
433 talloc_free(state->gensec_state);
434 state->gensec_state = NULL;
435 }
436 } else if ( (strncmp(buf, "OK", 2) == 0)) {
437 /* Just return BH, like ntlm_auth from Samba 3 does. */
438 mux_printf(mux_id, "BH\n");
439 data_blob_free(&in);
440 return;
441 } else if ( (strncmp(buf, "TT ", 3) != 0) &&
442 (strncmp(buf, "KK ", 3) != 0) &&
443 (strncmp(buf, "AF ", 3) != 0) &&
444 (strncmp(buf, "NA ", 3) != 0) &&
445 (strncmp(buf, "UG", 2) != 0) &&
446 (strncmp(buf, "PW ", 3) != 0) &&
447 (strncmp(buf, "GK", 2) != 0) &&
448 (strncmp(buf, "GF", 2) != 0)) {
449 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
450 mux_printf(mux_id, "BH\n");
451 data_blob_free(&in);
452 return;
453 }
454
455 /* setup gensec */
456 if (!(state->gensec_state)) {
457 switch (stdio_helper_mode) {
458 case GSS_SPNEGO_CLIENT:
459 case NTLMSSP_CLIENT_1:
460 /* setup the client side */
461
462 nt_status = gensec_client_start(NULL, &state->gensec_state, NULL, lp_ctx);
463 if (!NT_STATUS_IS_OK(nt_status)) {
464 exit(1);
465 }
466
467 break;
468 case GSS_SPNEGO_SERVER:
469 case SQUID_2_5_NTLMSSP:
470 ev = event_context_init(state);
471 if (!ev) {
472 exit(1);
473 }
474 msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx),
475 lp_iconv_convenience(lp_ctx), ev);
476 if (!msg) {
477 exit(1);
478 }
479 if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, lp_ctx, msg, &state->gensec_state))) {
480 exit(1);
481 }
482 break;
483 default:
484 abort();
485 }
486
487 creds = cli_credentials_init(state->gensec_state);
488 cli_credentials_set_conf(creds, lp_ctx);
489 if (opt_username) {
490 cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
491 }
492 if (opt_domain) {
493 cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
494 }
495 if (state->set_password) {
496 cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED);
497 } else {
498 cli_credentials_set_password_callback(creds, get_password);
499 creds->priv_data = (void*)mux_id;
500 }
501 if (opt_workstation) {
502 cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED);
503 }
504
505 switch (stdio_helper_mode) {
506 case GSS_SPNEGO_SERVER:
507 case SQUID_2_5_NTLMSSP:
508 cli_credentials_set_machine_account(creds, lp_ctx);
509 break;
510 default:
511 break;
512 }
513
514 gensec_set_credentials(state->gensec_state, creds);
515 gensec_want_feature_list(state->gensec_state, want_feature_list);
516
517 switch (stdio_helper_mode) {
518 case GSS_SPNEGO_CLIENT:
519 case GSS_SPNEGO_SERVER:
520 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO);
521 if (!in.length) {
522 first = true;
523 }
524 break;
525 case NTLMSSP_CLIENT_1:
526 if (!in.length) {
527 first = true;
528 }
529 /* fall through */
530 case SQUID_2_5_NTLMSSP:
531 nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP);
532 break;
533 default:
534 abort();
535 }
536
537 if (!NT_STATUS_IS_OK(nt_status)) {
538 DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
539 mux_printf(mux_id, "BH\n");
540 return;
541 }
542
543 }
544
545 /* update */
546 mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
547
548 if (strncmp(buf, "PW ", 3) == 0) {
549 state->set_password = talloc_strndup(state,
550 (const char *)in.data,
551 in.length);
552
553 cli_credentials_set_password(gensec_get_credentials(state->gensec_state),
554 state->set_password,
555 CRED_SPECIFIED);
556 mux_printf(mux_id, "OK\n");
557 data_blob_free(&in);
558 talloc_free(mem_ctx);
559 return;
560 }
561
562 if (strncmp(buf, "UG", 2) == 0) {
563 int i;
564 char *grouplist = NULL;
565 struct auth_session_info *session_info;
566
567 nt_status = gensec_session_info(state->gensec_state, &session_info);
568 if (!NT_STATUS_IS_OK(nt_status)) {
569 DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
570 mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
571 data_blob_free(&in);
572 talloc_free(mem_ctx);
573 return;
574 }
575
576 /* get the string onto the context */
577 grouplist = talloc_strdup(mem_ctx, "");
578
579 for (i=0; i<session_info->security_token->num_sids; i++) {
580 struct security_token *token = session_info->security_token;
581 const char *sidstr = dom_sid_string(session_info,
582 token->sids[i]);
583 grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr);
584 }
585
586 mux_printf(mux_id, "GL %s\n", grouplist);
587 talloc_free(session_info);
588 data_blob_free(&in);
589 talloc_free(mem_ctx);
590 return;
591 }
592
593 if (strncmp(buf, "GK", 2) == 0) {
594 char *base64_key;
595 DEBUG(10, ("Requested session key\n"));
596 nt_status = gensec_session_key(state->gensec_state, &session_key);
597 if(!NT_STATUS_IS_OK(nt_status)) {
598 DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status)));
599 mux_printf(mux_id, "BH No session key\n");
600 talloc_free(mem_ctx);
601 return;
602 } else {
603 base64_key = base64_encode_data_blob(state, session_key);
604 mux_printf(mux_id, "GK %s\n", base64_key);
605 talloc_free(base64_key);
606 }
607 talloc_free(mem_ctx);
608 return;
609 }
610
611 if (strncmp(buf, "GF", 2) == 0) {
612 struct gensec_ntlmssp_state *gensec_ntlmssp_state;
613 uint32_t neg_flags;
614
615 gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data,
616 struct gensec_ntlmssp_state);
617 neg_flags = gensec_ntlmssp_state->neg_flags;
618
619 DEBUG(10, ("Requested negotiated feature flags\n"));
620 mux_printf(mux_id, "GF 0x%08x\n", neg_flags);
621 return;
622 }
623
624 nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out);
625
626 /* don't leak 'bad password'/'no such user' info to the network client */
627 nt_status = auth_nt_status_squash(nt_status);
628
629 if (out.length) {
630 out_base64 = base64_encode_data_blob(mem_ctx, out);
631 } else {
632 out_base64 = NULL;
633 }
634
635 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
636 reply_arg = "*";
637 if (first) {
638 reply_code = "YR";
639 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
640 reply_code = "KK";
641 } else if (state->gensec_state->gensec_role == GENSEC_SERVER) {
642 reply_code = "TT";
643 } else {
644 abort();
645 }
646
647
648 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
649 reply_code = "BH";
650 reply_arg = nt_errstr(nt_status);
651 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
652 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
653 reply_code = "BH";
654 reply_arg = nt_errstr(nt_status);
655 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
656 } else if (!NT_STATUS_IS_OK(nt_status)) {
657 reply_code = "NA";
658 reply_arg = nt_errstr(nt_status);
659 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
660 } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) {
661 struct auth_session_info *session_info;
662
663 nt_status = gensec_session_info(state->gensec_state, &session_info);
664 if (!NT_STATUS_IS_OK(nt_status)) {
665 reply_code = "BH";
666 reply_arg = nt_errstr(nt_status);
667 DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
668 } else {
669
670 reply_code = "AF";
671 reply_arg = talloc_asprintf(state->gensec_state,
672 "%s%s%s", session_info->server_info->domain_name,
673 lp_winbind_separator(lp_ctx), session_info->server_info->account_name);
674 talloc_free(session_info);
675 }
676 } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) {
677 reply_code = "AF";
678 reply_arg = out_base64;
679 } else {
680 abort();
681 }
682
683 switch (stdio_helper_mode) {
684 case GSS_SPNEGO_SERVER:
685 mux_printf(mux_id, "%s %s %s\n", reply_code,
686 out_base64 ? out_base64 : "*",
687 reply_arg ? reply_arg : "*");
688 break;
689 default:
690 if (out_base64) {
691 mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
692 } else if (reply_arg) {
693 mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
694 } else {
695 mux_printf(mux_id, "%s\n", reply_code);
696 }
697 }
698
699 talloc_free(mem_ctx);
700 return;
701 }
702
703 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
704 struct loadparm_context *lp_ctx,
705 char *buf, int length, void **private,
706 unsigned int mux_id, void **private2)
707 {
708 char *request, *parameter;
709 static DATA_BLOB challenge;
710 static DATA_BLOB lm_response;
711 static DATA_BLOB nt_response;
712 static char *full_username;
713 static char *username;
714 static char *domain;
715 static char *plaintext_password;
716 static bool ntlm_server_1_user_session_key;
717 static bool ntlm_server_1_lm_session_key;
718
719 if (strequal(buf, ".")) {
720 if (!full_username && !username) {
721 mux_printf(mux_id, "Error: No username supplied!\n");
722 } else if (plaintext_password) {
723 /* handle this request as plaintext */
724 if (!full_username) {
725 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username) == -1) {
726 mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
727 return;
728 }
729 }
730 if (check_plaintext_auth(full_username, plaintext_password, false)) {
731 mux_printf(mux_id, "Authenticated: Yes\n");
732 } else {
733 mux_printf(mux_id, "Authenticated: No\n");
734 }
735 } else if (!lm_response.data && !nt_response.data) {
736 mux_printf(mux_id, "Error: No password supplied!\n");
737 } else if (!challenge.data) {
738 mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
739 } else {
740 char *error_string = NULL;
741 DATA_BLOB lm_key;
742 DATA_BLOB user_session_key;
743 uint32_t flags = 0;
744
745 if (full_username && !username) {
746 fstring fstr_user;
747 fstring fstr_domain;
748
749 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain,
750 *lp_winbind_separator(lp_ctx))) {
751 /* username might be 'tainted', don't print into our new-line deleimianted stream */
752 mux_printf(mux_id, "Error: Could not parse into domain and username\n");
753 }
754 SAFE_FREE(username);
755 SAFE_FREE(domain);
756 username = smb_xstrdup(fstr_user);
757 domain = smb_xstrdup(fstr_domain);
758 }
759
760 if (!domain) {
761 domain = smb_xstrdup(lp_workgroup(lp_ctx));
762 }
763
764 if (ntlm_server_1_lm_session_key)
765 flags |= NTLM_AUTH_FLAG_LMKEY;
766
767 if (ntlm_server_1_user_session_key)
768 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
769
770 if (!NT_STATUS_IS_OK(
771 local_pw_check_specified(lp_ctx,
772 username,
773 domain,
774 lp_netbios_name(lp_ctx),
775 &challenge,
776 &lm_response,
777 &nt_response,
778 flags,
779 &lm_key,
780 &user_session_key,
781 &error_string,
782 NULL))) {
783
784 mux_printf(mux_id, "Authenticated: No\n");
785 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
786 SAFE_FREE(error_string);
787 } else {
788 static char zeros[16];
789 char *hex_lm_key;
790 char *hex_user_session_key;
791
792 mux_printf(mux_id, "Authenticated: Yes\n");
793
794 if (ntlm_server_1_lm_session_key
795 && lm_key.length
796 && (memcmp(zeros, lm_key.data,
797 lm_key.length) != 0)) {
798 hex_encode(lm_key.data,
799 lm_key.length,
800 &hex_lm_key);
801 mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
802 SAFE_FREE(hex_lm_key);
803 }
804
805 if (ntlm_server_1_user_session_key
806 && user_session_key.length
807 && (memcmp(zeros, user_session_key.data,
808 user_session_key.length) != 0)) {
809 hex_encode(user_session_key.data,
810 user_session_key.length,
811 &hex_user_session_key);
812 mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
813 SAFE_FREE(hex_user_session_key);
814 }
815 }
816 }
817 /* clear out the state */
818 challenge = data_blob(NULL, 0);
819 nt_response = data_blob(NULL, 0);
820 lm_response = data_blob(NULL, 0);
821 SAFE_FREE(full_username);
822 SAFE_FREE(username);
823 SAFE_FREE(domain);
824 SAFE_FREE(plaintext_password);
825 ntlm_server_1_user_session_key = false;
826 ntlm_server_1_lm_session_key = false;
827 mux_printf(mux_id, ".\n");
828
829 return;
830 }
831
832 request = buf;
833
834 /* Indicates a base64 encoded structure */
835 parameter = strstr(request, ":: ");
836 if (!parameter) {
837 parameter = strstr(request, ": ");
838
839 if (!parameter) {
840 DEBUG(0, ("Parameter not found!\n"));
841 mux_printf(mux_id, "Error: Parameter not found!\n.\n");
842 return;
843 }
844
845 parameter[0] ='\0';
846 parameter++;
847 parameter[0] ='\0';
848 parameter++;
849
850 } else {
851 parameter[0] ='\0';
852 parameter++;
853 parameter[0] ='\0';
854 parameter++;
855 parameter[0] ='\0';
856 parameter++;
857
858 base64_decode_inplace(parameter);
859 }
860
861 if (strequal(request, "LANMAN-Challenge")) {
862 challenge = strhex_to_data_blob(parameter);
863 if (challenge.length != 8) {
864 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
865 parameter,
866 (int)challenge.length);
867 challenge = data_blob(NULL, 0);
868 }
869 } else if (strequal(request, "NT-Response")) {
870 nt_response = strhex_to_data_blob(parameter);
871 if (nt_response.length < 24) {
872 mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
873 parameter,
874 (int)nt_response.length);
875 nt_response = data_blob(NULL, 0);
876 }
877 } else if (strequal(request, "LANMAN-Response")) {
878 lm_response = strhex_to_data_blob(parameter);
879 if (lm_response.length != 24) {
880 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
881 parameter,
882 (int)lm_response.length);
883 lm_response = data_blob(NULL, 0);
884 }
885 } else if (strequal(request, "Password")) {
886 plaintext_password = smb_xstrdup(parameter);
887 } else if (strequal(request, "NT-Domain")) {
888 domain = smb_xstrdup(parameter);
889 } else if (strequal(request, "Username")) {
890 username = smb_xstrdup(parameter);
891 } else if (strequal(request, "Full-Username")) {
892 full_username = smb_xstrdup(parameter);
893 } else if (strequal(request, "Request-User-Session-Key")) {
894 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
895 } else if (strequal(request, "Request-LanMan-Session-Key")) {
896 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
897 } else {
898 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
899 }
900 }
901
902 static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode,
903 stdio_helper_function fn, void **private2)
904 {
905 char *buf;
906 char tmp[INITIAL_BUFFER_SIZE+1];
907 unsigned int mux_id = 0;
908 int length, buf_size = 0;
909 char *c;
910 struct mux_private {
911 unsigned int max_mux;
912 void **private_pointers;
913 };
914
915 static struct mux_private *mux_private;
916 static void *normal_private;
917 void **private;
918
919 buf = talloc_strdup(NULL, "");
920
921 if (buf == NULL) {
922 DEBUG(0, ("Failed to allocate memory for reading the input "
923 "buffer.\n"));
924 x_fprintf(x_stdout, "ERR\n");
925 return;
926 }
927
928 do {
929 /* this is not a typo - x_fgets doesn't work too well under
930 * squid */
931 if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) {
932 if (ferror(stdin)) {
933 DEBUG(1, ("fgets() failed! dying..... errno=%d "
934 "(%s)\n", ferror(stdin),
935 strerror(ferror(stdin))));
936
937 exit(1); /* BIIG buffer */
938 }
939 exit(0);
940 }
941
942 buf = talloc_strdup_append_buffer(buf, tmp);
943 buf_size += INITIAL_BUFFER_SIZE;
944
945 if (buf_size > MAX_BUFFER_SIZE) {
946 DEBUG(0, ("Invalid Request (too large)\n"));
947 x_fprintf(x_stdout, "ERR\n");
948 talloc_free(buf);
949 return;
950 }
951
952 c = strchr(buf, '\n');
953 } while (c == NULL);
954
955 *c = '\0';
956 length = c-buf;
957
958 DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
959
960 if (buf[0] == '\0') {
961 DEBUG(0, ("Invalid Request (empty)\n"));
962 x_fprintf(x_stdout, "ERR\n");
963 talloc_free(buf);
964 return;
965 }
966
967 if (opt_multiplex) {
968 if (sscanf(buf, "%u ", &mux_id) != 1) {
969 DEBUG(0, ("Invalid Request - no multiplex id\n"));
970 x_fprintf(x_stdout, "ERR\n");
971 talloc_free(buf);
972 return;
973 }
974 if (!mux_private) {
975 mux_private = talloc(NULL, struct mux_private);
976 mux_private->max_mux = 0;
977 mux_private->private_pointers = NULL;
978 }
979
980 c=strchr(buf,' ');
981 if (!c) {
982 DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
983 x_fprintf(x_stdout, "ERR\n");
984 talloc_free(buf);
985 return;
986 }
987 c++;
988 if (mux_id >= mux_private->max_mux) {
989 unsigned int prev_max = mux_private->max_mux;
990 mux_private->max_mux = mux_id + 1;
991 mux_private->private_pointers
992 = talloc_realloc(mux_private,
993 mux_private->private_pointers,
994 void *, mux_private->max_mux);
995 memset(&mux_private->private_pointers[prev_max], '\0',
996 (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
997 };
998
999 private = &mux_private->private_pointers[mux_id];
1000 } else {
1001 c = buf;
1002 private = &normal_private;
1003 }
1004
1005 fn(helper_mode, lp_ctx, c, length, private, mux_id, private2);
1006 talloc_free(buf);
1007 }
1008
1009 static void squid_stream(struct loadparm_context *lp_ctx,
1010 enum stdio_helper_mode stdio_mode,
1011 stdio_helper_function fn) {
1012 /* initialize FDescs */
1013 x_setbuf(x_stdout, NULL);
1014 x_setbuf(x_stderr, NULL);
1015 while(1) {
1016 manage_squid_request(lp_ctx, stdio_mode, fn, NULL);
1017 }
1018 }
1019
1020
1021 /* Main program */
1022
1023 enum {
1024 OPT_USERNAME = 1000,
1025 OPT_DOMAIN,
1026 OPT_WORKSTATION,
1027 OPT_CHALLENGE,
1028 OPT_RESPONSE,
1029 OPT_LM,
1030 OPT_NT,
1031 OPT_PASSWORD,
1032 OPT_LM_KEY,
1033 OPT_USER_SESSION_KEY,
1034 OPT_DIAGNOSTICS,
1035 OPT_REQUIRE_MEMBERSHIP,
1036 OPT_MULTIPLEX,
1037 OPT_USE_CACHED_CREDS,
1038 };
1039
1040 int main(int argc, const char **argv)
1041 {
1042 static const char *helper_protocol;
1043 int opt;
1044
1045 poptContext pc;
1046
1047 /* NOTE: DO NOT change this interface without considering the implications!
1048 This is an external interface, which other programs will use to interact
1049 with this helper.
1050 */
1051
1052 /* We do not use single-letter command abbreviations, because they harm future
1053 interface stability. */
1054
1055 struct poptOption long_options[] = {
1056 POPT_AUTOHELP
1057 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
1058 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
1059 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
1060 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
1061 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
1062 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
1063 { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"},
1064 POPT_COMMON_SAMBA
1065 POPT_COMMON_VERSION
1066 { NULL }
1067 };
1068
1069 /* Samba client initialisation */
1070
1071 setup_logging(NULL, DEBUG_STDERR);
1072
1073 /* Parse options */
1074
1075 pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
1076
1077 /* Parse command line options */
1078
1079 if (argc == 1) {
1080 poptPrintHelp(pc, stderr, 0);
1081 return 1;
1082 }
1083
1084 pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
1085 POPT_CONTEXT_KEEP_FIRST);
1086
1087 while((opt = poptGetNextOpt(pc)) != -1) {
1088 if (opt < -1) {
1089 break;
1090 }
1091 }
1092 if (opt < -1) {
1093 fprintf(stderr, "%s: %s\n",
1094 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1095 poptStrerror(opt));
1096 return 1;
1097 }
1098
1099 gensec_init(cmdline_lp_ctx);
1100
1101 if (opt_domain == NULL) {
1102 opt_domain = lp_workgroup(cmdline_lp_ctx);
1103 }
1104
1105 if (helper_protocol) {
1106 int i;
1107 for (i=0; i<NUM_HELPER_MODES; i++) {
1108 if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
1109 squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
1110 exit(0);
1111 }
1112 }
1113 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
1114
1115 for (i=0; i<NUM_HELPER_MODES; i++) {
1116 x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
1117 }
1118
1119 exit(1);
1120 }
1121
1122 if (!opt_username) {
1123 x_fprintf(x_stderr, "username must be specified!\n\n");
1124 poptPrintHelp(pc, stderr, 0);
1125 exit(1);
1126 }
1127
1128 if (opt_workstation == NULL) {
1129 opt_workstation = lp_netbios_name(cmdline_lp_ctx);
1130 }
1131
1132 if (!opt_password) {
1133 opt_password = getpass("password: ");
1134 }
1135
1136 {
1137 char *user;
1138
1139 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username);
1140 if (!check_plaintext_auth(user, opt_password, true)) {
1141 return 1;
1142 }
1143 }
1144
1145 /* Exit code */
1146
1147 poptFreeContext(pc);
1148 return 0;
1149 }
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