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r8974: Support makefile fragments in .mk files
[Samba/gbeck.git] / source4 / utils / ntlm_auth.c
blob1431f7f415265e3b7197619e2a23ecdc59be79ab
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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 #include "includes.h"
26 #include "dynconfig.h"
27 #include "system/filesys.h"
28 #include "system/passwd.h"
29 #include "lib/cmdline/popt_common.h"
30 #include "auth/auth.h"
31 #include "libcli/security/security.h"
32
33 #undef DBGC_CLASS
34 #define DBGC_CLASS DBGC_WINBIND
35
36 #define SQUID_BUFFER_SIZE 2010
37
38 enum stdio_helper_mode {
39 SQUID_2_4_BASIC,
40 SQUID_2_5_BASIC,
41 SQUID_2_5_NTLMSSP,
42 NTLMSSP_CLIENT_1,
43 GSS_SPNEGO_CLIENT,
44 GSS_SPNEGO_SERVER,
45 NTLM_SERVER_1,
46 NUM_HELPER_MODES
47 };
48
49 #define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004
50 #define NTLM_AUTH_FLAG_LMKEY 0x0008
51
52
53 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode,
54 char *buf, int length, void **private,
55 unsigned int mux_id, void **private2);
56
57 static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode,
58 char *buf, int length, void **private,
59 unsigned int mux_id, void **private2);
60
61 static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode,
62 char *buf, int length, void **private,
63 unsigned int mux_id, void **private2);
64
65 static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode,
66 char *buf, int length, void **private,
67 unsigned int mux_id, void **private2);
68
69 static void manage_squid_request(enum stdio_helper_mode helper_mode,
70 stdio_helper_function fn, void **private2);
71
72 static const struct {
73 enum stdio_helper_mode mode;
74 const char *name;
75 stdio_helper_function fn;
76 } stdio_helper_protocols[] = {
77 { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request},
78 { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request},
79 { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request},
80 { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request},
81 { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request},
82 { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request},
83 { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request},
84 { NUM_HELPER_MODES, NULL, NULL}
85 };
86
87 extern int winbindd_fd;
88
89 static const char *opt_username;
90 static const char *opt_domain;
91 static const char *opt_workstation;
92 static const char *opt_password;
93 static int opt_multiplex;
94
95
96 static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
97
98 static void mux_printf(unsigned int mux_id, const char *format, ...)
99 {
100 va_list ap;
101
102 if (opt_multiplex) {
103 x_fprintf(x_stdout, "%d ", mux_id);
104 }
105
106 va_start(ap, format);
107 x_vfprintf(x_stdout, format, ap);
108 va_end(ap);
109 }
110
111
112
113 /* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
114 form DOMAIN/user into a domain and a user */
115
116 static BOOL parse_ntlm_auth_domain_user(const char *domuser, fstring domain,
117 fstring user)
118 {
119
120 char *p = strchr(domuser,*lp_winbind_separator());
121
122 if (!p) {
123 return False;
124 }
125
126 fstrcpy(user, p+1);
127 fstrcpy(domain, domuser);
128 domain[PTR_DIFF(p, domuser)] = 0;
129
130 return True;
131 }
132
133 /* Authenticate a user with a plaintext password */
134
135 static BOOL check_plaintext_auth(const char *user, const char *pass,
136 BOOL stdout_diagnostics)
137 {
138 return (strcmp(pass, opt_password) == 0);
139 }
140
141 /* authenticate a user with an encrypted username/password */
142
143 static NTSTATUS local_pw_check_specified(const char *username,
144 const char *domain,
145 const char *workstation,
146 const DATA_BLOB *challenge,
147 const DATA_BLOB *lm_response,
148 const DATA_BLOB *nt_response,
149 uint32_t flags,
150 DATA_BLOB *lm_session_key,
151 DATA_BLOB *user_session_key,
152 char **error_string,
153 char **unix_name)
154 {
155 NTSTATUS nt_status;
156 struct samr_Password lm_pw, nt_pw;
157 struct samr_Password *lm_pwd, *nt_pwd;
158 TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified");
159 if (!mem_ctx) {
160 nt_status = NT_STATUS_NO_MEMORY;
161 } else {
162
163 E_md4hash(opt_password, nt_pw.hash);
164 if (E_deshash(opt_password, lm_pw.hash)) {
165 lm_pwd = &lm_pw;
166 } else {
167 lm_pwd = NULL;
168 }
169 nt_pwd = &nt_pw;
170
171
172 nt_status = ntlm_password_check(mem_ctx,
173 challenge,
174 lm_response,
175 nt_response,
176 username,
177 username,
178 domain,
179 lm_pwd, nt_pwd, user_session_key, lm_session_key);
180
181 if (NT_STATUS_IS_OK(nt_status)) {
182 if (unix_name) {
183 asprintf(unix_name,
184 "%s%c%s", domain,
185 *lp_winbind_separator(),
186 username);
187 }
188 } else {
189 DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n",
190 domain, username, workstation,
191 nt_errstr(nt_status)));
192 }
193 talloc_free(mem_ctx);
194 }
195 if (error_string) {
196 *error_string = strdup(nt_errstr(nt_status));
197 }
198 return nt_status;
199
200
201 }
202
203 static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode,
204 char *buf, int length, void **private,
205 unsigned int mux_id, void **private2)
206 {
207 char *user, *pass;
208 user=buf;
209
210 pass=memchr(buf,' ',length);
211 if (!pass) {
212 DEBUG(2, ("Password not found. Denying access\n"));
213 mux_printf(mux_id, "ERR\n");
214 return;
215 }
216 *pass='\0';
217 pass++;
218
219 if (stdio_helper_mode == SQUID_2_5_BASIC) {
220 rfc1738_unescape(user);
221 rfc1738_unescape(pass);
222 }
223
224 if (check_plaintext_auth(user, pass, False)) {
225 mux_printf(mux_id, "OK\n");
226 } else {
227 mux_printf(mux_id, "ERR\n");
228 }
229 }
230
231 /* This is a bit hairy, but the basic idea is to do a password callback
232 to the calling application. The callback comes from within gensec */
233
234 static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode,
235 char *buf, int length, void **private,
236 unsigned int mux_id, void **password)
237 {
238 DATA_BLOB in;
239 if (strlen(buf) < 2) {
240 DEBUG(1, ("query [%s] invalid", buf));
241 mux_printf(mux_id, "BH\n");
242 return;
243 }
244
245 if (strlen(buf) > 3) {
246 in = base64_decode_data_blob(NULL, buf + 3);
247 } else {
248 in = data_blob(NULL, 0);
249 }
250
251 if (strncmp(buf, "PW ", 3) == 0) {
252
253 *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */,
254 (const char *)in.data, in.length);
255
256 if (*password == NULL) {
257 DEBUG(1, ("Out of memory\n"));
258 mux_printf(mux_id, "BH\n");
259 data_blob_free(&in);
260 return;
261 }
262
263 mux_printf(mux_id, "OK\n");
264 data_blob_free(&in);
265 return;
266 }
267 DEBUG(1, ("Asked for (and expected) a password\n"));
268 mux_printf(mux_id, "BH\n");
269 data_blob_free(&in);
270 }
271
272 /**
273 * Callback for password credentails. This is not async, and when
274 * GENSEC and the credentails code is made async, it will look rather
275 * different.
276 */
277
278 static const char *get_password(struct cli_credentials *credentials)
279 {
280 char *password = NULL;
281
282 /* Ask for a password */
283 mux_printf((unsigned int)credentials->priv_data, "PW\n");
284 credentials->priv_data = NULL;
285
286 manage_squid_request(NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password);
287 return password;
288 }
289
290 static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode,
291 char *buf, int length, void **private,
292 unsigned int mux_id, void **private2)
293 {
294 DATA_BLOB in;
295 DATA_BLOB out = data_blob(NULL, 0);
296 char *out_base64 = NULL;
297 const char *reply_arg = NULL;
298 struct gensec_security **gensec_state = (struct gensec_security **)private;
299 NTSTATUS nt_status;
300 BOOL first = False;
301 const char *reply_code;
302 struct cli_credentials *creds;
303
304 TALLOC_CTX *mem_ctx;
305
306 if (strlen(buf) < 2) {
307 DEBUG(1, ("query [%s] invalid", buf));
308 mux_printf(mux_id, "BH\n");
309 return;
310 }
311
312 if (strlen(buf) > 3) {
313 in = base64_decode_data_blob(NULL, buf + 3);
314 } else {
315 in = data_blob(NULL, 0);
316 }
317
318 if (strncmp(buf, "YR", 2) == 0) {
319 if (gensec_state && *gensec_state) {
320 talloc_free(*gensec_state);
321 *gensec_state = NULL;
322 }
323 } else if ( (strncmp(buf, "OK", 2) == 0)) {
324 /* do nothing */
325 data_blob_free(&in);
326 return;
327 } else if ( (strncmp(buf, "TT ", 3) != 0) &&
328 (strncmp(buf, "KK ", 3) != 0) &&
329 (strncmp(buf, "AF ", 3) != 0) &&
330 (strncmp(buf, "NA ", 3) != 0) &&
331 (strncmp(buf, "UG", 2) != 0) &&
332 (strncmp(buf, "PW ", 3) != 0)) {
333 DEBUG(1, ("SPNEGO request [%s] invalid\n", buf));
334 mux_printf(mux_id, "BH\n");
335 data_blob_free(&in);
336 return;
337 }
338
339 /* setup gensec */
340 if (!(gensec_state && *gensec_state)) {
341 switch (stdio_helper_mode) {
342 case GSS_SPNEGO_CLIENT:
343 case NTLMSSP_CLIENT_1:
344 /* setup the client side */
345
346 nt_status = gensec_client_start(NULL, gensec_state, NULL);
347 if (!NT_STATUS_IS_OK(nt_status)) {
348 exit(1);
349 }
350
351 creds = cli_credentials_init(*gensec_state);
352 cli_credentials_set_conf(creds);
353 if (opt_username) {
354 cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED);
355 }
356 if (opt_domain) {
357 cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED);
358 }
359 if (opt_password) {
360 cli_credentials_set_password(creds, opt_password, CRED_SPECIFIED);
361 } else {
362 creds->password_obtained = CRED_CALLBACK;
363 creds->password_cb = get_password;
364 creds->priv_data = (void*)mux_id;
365 }
366
367 gensec_set_credentials(*gensec_state, creds);
368
369 break;
370 case GSS_SPNEGO_SERVER:
371 case SQUID_2_5_NTLMSSP:
372 if (!NT_STATUS_IS_OK(gensec_server_start(NULL, gensec_state, NULL))) {
373 exit(1);
374 }
375 break;
376 default:
377 abort();
378 }
379
380 switch (stdio_helper_mode) {
381 case GSS_SPNEGO_CLIENT:
382 case GSS_SPNEGO_SERVER:
383 nt_status = gensec_start_mech_by_oid(*gensec_state, GENSEC_OID_SPNEGO);
384 if (!in.length) {
385 first = True;
386 }
387 break;
388 case NTLMSSP_CLIENT_1:
389 if (!in.length) {
390 first = True;
391 }
392 case SQUID_2_5_NTLMSSP:
393 nt_status = gensec_start_mech_by_oid(*gensec_state, GENSEC_OID_NTLMSSP);
394 break;
395 default:
396 abort();
397 }
398
399 if (!NT_STATUS_IS_OK(nt_status)) {
400 DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status)));
401 mux_printf(mux_id, "BH\n");
402 return;
403 }
404 }
405
406 if (strncmp(buf, "PW ", 3) == 0) {
407
408 cli_credentials_set_password((*gensec_state)->credentials,
409 talloc_strndup((*gensec_state),
410 (const char *)in.data,
411 in.length),
412 CRED_SPECIFIED);
413 mux_printf(mux_id, "OK\n");
414 data_blob_free(&in);
415 return;
416 }
417
418 /* update */
419 mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx");
420
421 if (strncmp(buf, "UG", 2) == 0) {
422 int i;
423 char *grouplist = NULL;
424 struct auth_session_info *session_info;
425
426 if (!NT_STATUS_IS_OK(gensec_session_info(*gensec_state, &session_info))) {
427 DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status)));
428 mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status));
429 data_blob_free(&in);
430 return;
431 }
432
433 /* get the string onto the context */
434 grouplist = talloc_strdup(mem_ctx, "");
435
436 for (i=0; i<session_info->security_token->num_sids; i++) {
437 struct security_token *token = session_info->security_token;
438 const char *sidstr = dom_sid_string(session_info,
439 token->sids[i]);
440 grouplist = talloc_asprintf_append(grouplist, "%s,", sidstr);
441 }
442
443 mux_printf(mux_id, "GL %s\n", grouplist);
444 talloc_free(session_info);
445 data_blob_free(&in);
446 talloc_free(mem_ctx);
447 return;
448 }
449
450 nt_status = gensec_update(*gensec_state, mem_ctx, in, &out);
451
452 /* don't leak 'bad password'/'no such user' info to the network client */
453 nt_status = auth_nt_status_squash(nt_status);
454
455 if (out.length) {
456 out_base64 = base64_encode_data_blob(mem_ctx, out);
457 } else {
458 out_base64 = NULL;
459 }
460
461 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
462 reply_arg = "*";
463 if (first) {
464 reply_code = "YR";
465 } else if ((*gensec_state)->gensec_role == GENSEC_CLIENT) {
466 reply_code = "KK";
467 } else if ((*gensec_state)->gensec_role == GENSEC_SERVER) {
468 reply_code = "TT";
469 } else {
470 abort();
471 }
472
473
474 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
475 reply_code = "BH";
476 reply_arg = nt_errstr(nt_status);
477 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
478 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
479 reply_code = "BH";
480 reply_arg = nt_errstr(nt_status);
481 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
482 } else if (!NT_STATUS_IS_OK(nt_status)) {
483 reply_code = "NA";
484 reply_arg = nt_errstr(nt_status);
485 DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status)));
486 } else if /* OK */ ((*gensec_state)->gensec_role == GENSEC_SERVER) {
487 struct auth_session_info *session_info;
488
489 nt_status = gensec_session_info(*gensec_state, &session_info);
490 if (!NT_STATUS_IS_OK(nt_status)) {
491 reply_code = "BH";
492 reply_arg = nt_errstr(nt_status);
493 DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status)));
494 } else {
495
496 reply_code = "AF";
497 reply_arg = talloc_asprintf(*gensec_state,
498 "%s%s%s", session_info->server_info->domain_name,
499 lp_winbind_separator(), session_info->server_info->account_name);
500 talloc_free(session_info);
501 }
502 } else if ((*gensec_state)->gensec_role == GENSEC_CLIENT) {
503 reply_code = "AF";
504 reply_arg = NULL;
505 } else {
506 abort();
507 }
508
509 switch (stdio_helper_mode) {
510 case GSS_SPNEGO_SERVER:
511 mux_printf(mux_id, "%s %s %s\n", reply_code,
512 out_base64 ? out_base64 : "*",
513 reply_arg ? reply_arg : "*");
514 break;
515 default:
516 if (out_base64) {
517 mux_printf(mux_id, "%s %s\n", reply_code, out_base64);
518 } else if (reply_arg) {
519 mux_printf(mux_id, "%s %s\n", reply_code, reply_arg);
520 } else {
521 mux_printf(mux_id, "%s\n", reply_code);
522 }
523 }
524
525 talloc_free(mem_ctx);
526 return;
527 }
528
529 static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode,
530 char *buf, int length, void **private,
531 unsigned int mux_id, void **private2)
532 {
533 char *request, *parameter;
534 static DATA_BLOB challenge;
535 static DATA_BLOB lm_response;
536 static DATA_BLOB nt_response;
537 static char *full_username;
538 static char *username;
539 static char *domain;
540 static char *plaintext_password;
541 static BOOL ntlm_server_1_user_session_key;
542 static BOOL ntlm_server_1_lm_session_key;
543
544 if (strequal(buf, ".")) {
545 if (!full_username && !username) {
546 mux_printf(mux_id, "Error: No username supplied!\n");
547 } else if (plaintext_password) {
548 /* handle this request as plaintext */
549 if (!full_username) {
550 if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(), username) == -1) {
551 mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n");
552 return;
553 }
554 }
555 if (check_plaintext_auth(full_username, plaintext_password, False)) {
556 mux_printf(mux_id, "Authenticated: Yes\n");
557 } else {
558 mux_printf(mux_id, "Authenticated: No\n");
559 }
560 } else if (!lm_response.data && !nt_response.data) {
561 mux_printf(mux_id, "Error: No password supplied!\n");
562 } else if (!challenge.data) {
563 mux_printf(mux_id, "Error: No lanman-challenge supplied!\n");
564 } else {
565 char *error_string = NULL;
566 DATA_BLOB lm_key;
567 DATA_BLOB user_session_key;
568 uint32_t flags = 0;
569
570 if (full_username && !username) {
571 fstring fstr_user;
572 fstring fstr_domain;
573
574 if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain)) {
575 /* username might be 'tainted', don't print into our new-line deleimianted stream */
576 mux_printf(mux_id, "Error: Could not parse into domain and username\n");
577 }
578 SAFE_FREE(username);
579 SAFE_FREE(domain);
580 username = smb_xstrdup(fstr_user);
581 domain = smb_xstrdup(fstr_domain);
582 }
583
584 if (!domain) {
585 domain = smb_xstrdup(lp_workgroup());
586 }
587
588 if (ntlm_server_1_lm_session_key)
589 flags |= NTLM_AUTH_FLAG_LMKEY;
590
591 if (ntlm_server_1_user_session_key)
592 flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY;
593
594 if (!NT_STATUS_IS_OK(
595 local_pw_check_specified(username,
596 domain,
597 lp_netbios_name(),
598 &challenge,
599 &lm_response,
600 &nt_response,
601 flags,
602 &lm_key,
603 &user_session_key,
604 &error_string,
605 NULL))) {
606
607 mux_printf(mux_id, "Authenticated: No\n");
608 mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string);
609 SAFE_FREE(error_string);
610 } else {
611 static char zeros[16];
612 char *hex_lm_key;
613 char *hex_user_session_key;
614
615 mux_printf(mux_id, "Authenticated: Yes\n");
616
617 if (ntlm_server_1_lm_session_key
618 && lm_key.length
619 && (memcmp(zeros, lm_key.data,
620 lm_key.length) != 0)) {
621 hex_encode(lm_key.data,
622 lm_key.length,
623 &hex_lm_key);
624 mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key);
625 SAFE_FREE(hex_lm_key);
626 }
627
628 if (ntlm_server_1_user_session_key
629 && user_session_key.length
630 && (memcmp(zeros, user_session_key.data,
631 user_session_key.length) != 0)) {
632 hex_encode(user_session_key.data,
633 user_session_key.length,
634 &hex_user_session_key);
635 mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key);
636 SAFE_FREE(hex_user_session_key);
637 }
638 }
639 }
640 /* clear out the state */
641 challenge = data_blob(NULL, 0);
642 nt_response = data_blob(NULL, 0);
643 lm_response = data_blob(NULL, 0);
644 SAFE_FREE(full_username);
645 SAFE_FREE(username);
646 SAFE_FREE(domain);
647 SAFE_FREE(plaintext_password);
648 ntlm_server_1_user_session_key = False;
649 ntlm_server_1_lm_session_key = False;
650 mux_printf(mux_id, ".\n");
651
652 return;
653 }
654
655 request = buf;
656
657 /* Indicates a base64 encoded structure */
658 parameter = strstr(request, ":: ");
659 if (!parameter) {
660 parameter = strstr(request, ": ");
661
662 if (!parameter) {
663 DEBUG(0, ("Parameter not found!\n"));
664 mux_printf(mux_id, "Error: Parameter not found!\n.\n");
665 return;
666 }
667
668 parameter[0] ='\0';
669 parameter++;
670 parameter[0] ='\0';
671 parameter++;
672
673 } else {
674 parameter[0] ='\0';
675 parameter++;
676 parameter[0] ='\0';
677 parameter++;
678 parameter[0] ='\0';
679 parameter++;
680
681 base64_decode_inplace(parameter);
682 }
683
684 if (strequal(request, "LANMAN-Challenge")) {
685 challenge = strhex_to_data_blob(parameter);
686 if (challenge.length != 8) {
687 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n",
688 parameter,
689 (int)challenge.length);
690 challenge = data_blob(NULL, 0);
691 }
692 } else if (strequal(request, "NT-Response")) {
693 nt_response = strhex_to_data_blob(parameter);
694 if (nt_response.length < 24) {
695 mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n",
696 parameter,
697 (int)nt_response.length);
698 nt_response = data_blob(NULL, 0);
699 }
700 } else if (strequal(request, "LANMAN-Response")) {
701 lm_response = strhex_to_data_blob(parameter);
702 if (lm_response.length != 24) {
703 mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n",
704 parameter,
705 (int)lm_response.length);
706 lm_response = data_blob(NULL, 0);
707 }
708 } else if (strequal(request, "Password")) {
709 plaintext_password = smb_xstrdup(parameter);
710 } else if (strequal(request, "NT-Domain")) {
711 domain = smb_xstrdup(parameter);
712 } else if (strequal(request, "Username")) {
713 username = smb_xstrdup(parameter);
714 } else if (strequal(request, "Full-Username")) {
715 full_username = smb_xstrdup(parameter);
716 } else if (strequal(request, "Request-User-Session-Key")) {
717 ntlm_server_1_user_session_key = strequal(parameter, "Yes");
718 } else if (strequal(request, "Request-LanMan-Session-Key")) {
719 ntlm_server_1_lm_session_key = strequal(parameter, "Yes");
720 } else {
721 mux_printf(mux_id, "Error: Unknown request %s\n.\n", request);
722 }
723 }
724
725 static void manage_squid_request(enum stdio_helper_mode helper_mode,
726 stdio_helper_function fn, void **private2)
727 {
728 char buf[SQUID_BUFFER_SIZE+1];
729 unsigned int mux_id;
730 int length;
731 char *c;
732 static BOOL err;
733 struct mux_private {
734 unsigned int max_mux;
735 void **private_pointers;
736 };
737
738 static struct mux_private *mux_private;
739 static void *normal_private;
740 void **private;
741
742 /* this is not a typo - x_fgets doesn't work too well under squid */
743 if (fgets(buf, sizeof(buf)-1, stdin) == NULL) {
744 if (ferror(stdin)) {
745 DEBUG(1, ("fgets() failed! dying..... errno=%d (%s)\n", ferror(stdin),
746 strerror(ferror(stdin))));
747
748 exit(1); /* BIIG buffer */
749 }
750 exit(0);
751 }
752
753 c=memchr(buf,'\n',sizeof(buf)-1);
754 if (c) {
755 *c = '\0';
756 length = c-buf;
757 } else {
758 err = 1;
759 return;
760 }
761 if (err) {
762 DEBUG(0, ("Oversized message\n"));
763 x_fprintf(x_stdout, "ERR\n");
764 err = 0;
765 return;
766 }
767
768 DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length));
769
770 if (buf[0] == '\0') {
771 DEBUG(0, ("Invalid Request (empty)\n"));
772 x_fprintf(x_stdout, "ERR\n");
773 return;
774 }
775
776 if (opt_multiplex) {
777 if (sscanf(buf, "%u ", &mux_id) != 1) {
778 DEBUG(0, ("Invalid Request - no multiplex id\n"));
779 x_fprintf(x_stdout, "ERR\n");
780 return;
781 }
782 if (!mux_private) {
783 mux_private = talloc(NULL, struct mux_private);
784 mux_private->max_mux = 0;
785 mux_private->private_pointers = NULL;
786 }
787
788 c=strchr(buf,' ');
789 if (!c) {
790 DEBUG(0, ("Invalid Request - no data after multiplex id\n"));
791 x_fprintf(x_stdout, "ERR\n");
792 return;
793 }
794 c++;
795 if (mux_id >= mux_private->max_mux) {
796 unsigned int prev_max = mux_private->max_mux;
797 mux_private->max_mux = mux_id + 1;
798 mux_private->private_pointers
799 = talloc_realloc(mux_private,
800 mux_private->private_pointers,
801 void *, mux_private->max_mux);
802 memset(&mux_private->private_pointers[prev_max], '\0',
803 (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max)));
804 };
805
806 private = &mux_private->private_pointers[mux_id];
807 } else {
808 c = buf;
809 private = &normal_private;
810 }
811
812 fn(helper_mode, c, length, private, mux_id, private2);
813 }
814
815 static void squid_stream(enum stdio_helper_mode stdio_mode,
816 stdio_helper_function fn) {
817 /* initialize FDescs */
818 x_setbuf(x_stdout, NULL);
819 x_setbuf(x_stderr, NULL);
820 while(1) {
821 manage_squid_request(stdio_mode, fn, NULL);
822 }
823 }
824
825
826 /* Main program */
827
828 enum {
829 OPT_USERNAME = 1000,
830 OPT_DOMAIN,
831 OPT_WORKSTATION,
832 OPT_CHALLENGE,
833 OPT_RESPONSE,
834 OPT_LM,
835 OPT_NT,
836 OPT_PASSWORD,
837 OPT_LM_KEY,
838 OPT_USER_SESSION_KEY,
839 OPT_DIAGNOSTICS,
840 OPT_REQUIRE_MEMBERSHIP,
841 OPT_MULTIPLEX,
842 };
843
844 int main(int argc, const char **argv)
845 {
846 static const char *helper_protocol;
847 int opt;
848
849 poptContext pc;
850
851 /* NOTE: DO NOT change this interface without considering the implications!
852 This is an external interface, which other programs will use to interact
853 with this helper.
854 */
855
856 /* We do not use single-letter command abbreviations, because they harm future
857 interface stability. */
858
859 struct poptOption long_options[] = {
860 POPT_AUTOHELP
861 { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"},
862 { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"},
863 { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"},
864 { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"},
865 { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"},
866 { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"},
867 POPT_COMMON_SAMBA
868 POPT_TABLEEND
869 };
870
871 /* Samba client initialisation */
872
873 setup_logging(NULL, DEBUG_STDERR);
874
875 /* Parse options */
876
877 pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0);
878
879 /* Parse command line options */
880
881 if (argc == 1) {
882 poptPrintHelp(pc, stderr, 0);
883 return 1;
884 }
885
886 pc = poptGetContext(NULL, argc, (const char **)argv, long_options,
887 POPT_CONTEXT_KEEP_FIRST);
888
889 while((opt = poptGetNextOpt(pc)) != -1) {
890 if (opt < -1) {
891 break;
892 }
893 }
894 if (opt < -1) {
895 fprintf(stderr, "%s: %s\n",
896 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
897 poptStrerror(opt));
898 return 1;
899 }
900
901 ntlm_auth_init_subsystems;
902
903
904 if (opt_domain == NULL) {
905 opt_domain = lp_workgroup();
906 }
907
908 if (helper_protocol) {
909 int i;
910 for (i=0; i<NUM_HELPER_MODES; i++) {
911 if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) {
912 squid_stream(stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn);
913 exit(0);
914 }
915 }
916 x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol);
917
918 for (i=0; i<NUM_HELPER_MODES; i++) {
919 x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name);
920 }
921
922 exit(1);
923 }
924
925 if (!opt_username) {
926 x_fprintf(x_stderr, "username must be specified!\n\n");
927 poptPrintHelp(pc, stderr, 0);
928 exit(1);
929 }
930
931 if (opt_workstation == NULL) {
932 opt_workstation = lp_netbios_name();
933 }
934
935 if (!opt_password) {
936 opt_password = getpass("password: ");
937 }
938
939 {
940 char *user;
941
942 asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(), opt_username);
943 if (!check_plaintext_auth(user, opt_password, True)) {
944 return 1;
945 }
946 }
947
948 /* Exit code */
949
950 poptFreeContext(pc);
951 return 0;
952 }
WIP