source: branches/samba-3.0/source/utils/ntlm_auth_diagnostics.c

Last change on this file was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 13.9 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 Winbind status program.
5
6 Copyright (C) Tim Potter 2000-2003
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004
8 Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 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 "utils/ntlm_auth.h"
27
28#undef DBGC_CLASS
29#define DBGC_CLASS DBGC_WINBIND
30
31enum ntlm_break {
32 BREAK_NONE,
33 BREAK_LM,
34 BREAK_NT,
35 NO_LM,
36 NO_NT
37};
38
39/*
40 Authenticate a user with a challenge/response, checking session key
41 and valid authentication types
42*/
43
44/*
45 * Test the normal 'LM and NTLM' combination
46 */
47
48static BOOL test_lm_ntlm_broken(enum ntlm_break break_which)
49{
50 BOOL pass = True;
51 NTSTATUS nt_status;
52 uint32 flags = 0;
53 DATA_BLOB lm_response = data_blob(NULL, 24);
54 DATA_BLOB nt_response = data_blob(NULL, 24);
55 DATA_BLOB session_key = data_blob(NULL, 16);
56
57 uchar lm_key[8];
58 uchar user_session_key[16];
59 uchar lm_hash[16];
60 uchar nt_hash[16];
61 DATA_BLOB chall = get_challenge();
62 char *error_string;
63
64 ZERO_STRUCT(lm_key);
65 ZERO_STRUCT(user_session_key);
66
67 flags |= WBFLAG_PAM_LMKEY;
68 flags |= WBFLAG_PAM_USER_SESSION_KEY;
69
70 SMBencrypt(opt_password,chall.data,lm_response.data);
71 E_deshash(opt_password, lm_hash);
72
73 SMBNTencrypt(opt_password,chall.data,nt_response.data);
74
75 E_md4hash(opt_password, nt_hash);
76 SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
77
78 switch (break_which) {
79 case BREAK_NONE:
80 break;
81 case BREAK_LM:
82 lm_response.data[0]++;
83 break;
84 case BREAK_NT:
85 nt_response.data[0]++;
86 break;
87 case NO_LM:
88 data_blob_free(&lm_response);
89 break;
90 case NO_NT:
91 data_blob_free(&nt_response);
92 break;
93 }
94
95 nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
96 opt_workstation,
97 &chall,
98 &lm_response,
99 &nt_response,
100 flags,
101 lm_key,
102 user_session_key,
103 &error_string, NULL);
104
105 data_blob_free(&lm_response);
106
107 if (!NT_STATUS_IS_OK(nt_status)) {
108 d_printf("%s (0x%x)\n",
109 error_string,
110 NT_STATUS_V(nt_status));
111 SAFE_FREE(error_string);
112 return break_which == BREAK_NT;
113 }
114
115 if (memcmp(lm_hash, lm_key,
116 sizeof(lm_key)) != 0) {
117 DEBUG(1, ("LM Key does not match expectations!\n"));
118 DEBUG(1, ("lm_key:\n"));
119 dump_data(1, (const char *)lm_key, 8);
120 DEBUG(1, ("expected:\n"));
121 dump_data(1, (const char *)lm_hash, 8);
122 pass = False;
123 }
124
125 if (break_which == NO_NT) {
126 if (memcmp(lm_hash, user_session_key,
127 8) != 0) {
128 DEBUG(1, ("NT Session Key does not match expectations (should be LM hash)!\n"));
129 DEBUG(1, ("user_session_key:\n"));
130 dump_data(1, (const char *)user_session_key, sizeof(user_session_key));
131 DEBUG(1, ("expected:\n"));
132 dump_data(1, (const char *)lm_hash, sizeof(lm_hash));
133 pass = False;
134 }
135 } else {
136 if (memcmp(session_key.data, user_session_key,
137 sizeof(user_session_key)) != 0) {
138 DEBUG(1, ("NT Session Key does not match expectations!\n"));
139 DEBUG(1, ("user_session_key:\n"));
140 dump_data(1, (const char *)user_session_key, 16);
141 DEBUG(1, ("expected:\n"));
142 dump_data(1, (const char *)session_key.data, session_key.length);
143 pass = False;
144 }
145 }
146 return pass;
147}
148
149/*
150 * Test LM authentication, no NT response supplied
151 */
152
153static BOOL test_lm(void)
154{
155
156 return test_lm_ntlm_broken(NO_NT);
157}
158
159/*
160 * Test the NTLM response only, no LM.
161 */
162
163static BOOL test_ntlm(void)
164{
165 return test_lm_ntlm_broken(NO_LM);
166}
167
168/*
169 * Test the NTLM response only, but in the LM field.
170 */
171
172static BOOL test_ntlm_in_lm(void)
173{
174 BOOL pass = True;
175 NTSTATUS nt_status;
176 uint32 flags = 0;
177 DATA_BLOB nt_response = data_blob(NULL, 24);
178
179 uchar lm_key[8];
180 uchar lm_hash[16];
181 uchar user_session_key[16];
182 DATA_BLOB chall = get_challenge();
183 char *error_string;
184
185 ZERO_STRUCT(user_session_key);
186
187 flags |= WBFLAG_PAM_LMKEY;
188 flags |= WBFLAG_PAM_USER_SESSION_KEY;
189
190 SMBNTencrypt(opt_password,chall.data,nt_response.data);
191
192 E_deshash(opt_password, lm_hash);
193
194 nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
195 opt_workstation,
196 &chall,
197 &nt_response,
198 NULL,
199 flags,
200 lm_key,
201 user_session_key,
202 &error_string, NULL);
203
204 data_blob_free(&nt_response);
205
206 if (!NT_STATUS_IS_OK(nt_status)) {
207 d_printf("%s (0x%x)\n",
208 error_string,
209 NT_STATUS_V(nt_status));
210 SAFE_FREE(error_string);
211 return False;
212 }
213
214 if (memcmp(lm_hash, lm_key,
215 sizeof(lm_key)) != 0) {
216 DEBUG(1, ("LM Key does not match expectations!\n"));
217 DEBUG(1, ("lm_key:\n"));
218 dump_data(1, (const char *)lm_key, 8);
219 DEBUG(1, ("expected:\n"));
220 dump_data(1, (const char *)lm_hash, 8);
221 pass = False;
222 }
223 if (memcmp(lm_hash, user_session_key, 8) != 0) {
224 DEBUG(1, ("Session Key (first 8 lm hash) does not match expectations!\n"));
225 DEBUG(1, ("user_session_key:\n"));
226 dump_data(1, (const char *)user_session_key, 16);
227 DEBUG(1, ("expected:\n"));
228 dump_data(1, (const char *)lm_hash, 8);
229 pass = False;
230 }
231 return pass;
232}
233
234/*
235 * Test the NTLM response only, but in the both the NT and LM fields.
236 */
237
238static BOOL test_ntlm_in_both(void)
239{
240 BOOL pass = True;
241 NTSTATUS nt_status;
242 uint32 flags = 0;
243 DATA_BLOB nt_response = data_blob(NULL, 24);
244 DATA_BLOB session_key = data_blob(NULL, 16);
245
246 char lm_key[8];
247 char lm_hash[16];
248 char user_session_key[16];
249 char nt_hash[16];
250 DATA_BLOB chall = get_challenge();
251 char *error_string;
252
253 ZERO_STRUCT(lm_key);
254 ZERO_STRUCT(user_session_key);
255
256 flags |= WBFLAG_PAM_LMKEY;
257 flags |= WBFLAG_PAM_USER_SESSION_KEY;
258
259 SMBNTencrypt(opt_password,chall.data,nt_response.data);
260 E_md4hash(opt_password, (unsigned char *)nt_hash);
261 SMBsesskeygen_ntv1((const unsigned char *)nt_hash, NULL, session_key.data);
262
263 E_deshash(opt_password, (unsigned char *)lm_hash);
264
265 nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
266 opt_workstation,
267 &chall,
268 &nt_response,
269 &nt_response,
270 flags,
271 (unsigned char *)lm_key,
272 (unsigned char *)user_session_key,
273 &error_string, NULL);
274
275 data_blob_free(&nt_response);
276
277 if (!NT_STATUS_IS_OK(nt_status)) {
278 d_printf("%s (0x%x)\n",
279 error_string,
280 NT_STATUS_V(nt_status));
281 SAFE_FREE(error_string);
282 return False;
283 }
284
285 if (memcmp(lm_hash, lm_key,
286 sizeof(lm_key)) != 0) {
287 DEBUG(1, ("LM Key does not match expectations!\n"));
288 DEBUG(1, ("lm_key:\n"));
289 dump_data(1, lm_key, 8);
290 DEBUG(1, ("expected:\n"));
291 dump_data(1, lm_hash, 8);
292 pass = False;
293 }
294 if (memcmp(session_key.data, user_session_key,
295 sizeof(user_session_key)) != 0) {
296 DEBUG(1, ("NT Session Key does not match expectations!\n"));
297 DEBUG(1, ("user_session_key:\n"));
298 dump_data(1, user_session_key, 16);
299 DEBUG(1, ("expected:\n"));
300 dump_data(1, (const char *)session_key.data, session_key.length);
301 pass = False;
302 }
303
304
305 return pass;
306}
307
308/*
309 * Test the NTLMv2 and LMv2 responses
310 */
311
312static BOOL test_lmv2_ntlmv2_broken(enum ntlm_break break_which)
313{
314 BOOL pass = True;
315 NTSTATUS nt_status;
316 uint32 flags = 0;
317 DATA_BLOB ntlmv2_response = data_blob(NULL, 0);
318 DATA_BLOB lmv2_response = data_blob(NULL, 0);
319 DATA_BLOB ntlmv2_session_key = data_blob(NULL, 0);
320 DATA_BLOB names_blob = NTLMv2_generate_names_blob(get_winbind_netbios_name(), get_winbind_domain());
321
322 uchar user_session_key[16];
323 DATA_BLOB chall = get_challenge();
324 char *error_string;
325
326 ZERO_STRUCT(user_session_key);
327
328 flags |= WBFLAG_PAM_USER_SESSION_KEY;
329
330 if (!SMBNTLMv2encrypt(opt_username, opt_domain, opt_password, &chall,
331 &names_blob,
332 &lmv2_response, &ntlmv2_response,
333 &ntlmv2_session_key)) {
334 data_blob_free(&names_blob);
335 return False;
336 }
337 data_blob_free(&names_blob);
338
339 switch (break_which) {
340 case BREAK_NONE:
341 break;
342 case BREAK_LM:
343 lmv2_response.data[0]++;
344 break;
345 case BREAK_NT:
346 ntlmv2_response.data[0]++;
347 break;
348 case NO_LM:
349 data_blob_free(&lmv2_response);
350 break;
351 case NO_NT:
352 data_blob_free(&ntlmv2_response);
353 break;
354 }
355
356 nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
357 opt_workstation,
358 &chall,
359 &lmv2_response,
360 &ntlmv2_response,
361 flags,
362 NULL,
363 user_session_key,
364 &error_string, NULL);
365
366 data_blob_free(&lmv2_response);
367 data_blob_free(&ntlmv2_response);
368
369 if (!NT_STATUS_IS_OK(nt_status)) {
370 d_printf("%s (0x%x)\n",
371 error_string,
372 NT_STATUS_V(nt_status));
373 SAFE_FREE(error_string);
374 return break_which == BREAK_NT;
375 }
376
377 if (break_which != NO_NT && break_which != BREAK_NT && memcmp(ntlmv2_session_key.data, user_session_key,
378 sizeof(user_session_key)) != 0) {
379 DEBUG(1, ("USER (NTLMv2) Session Key does not match expectations!\n"));
380 DEBUG(1, ("user_session_key:\n"));
381 dump_data(1, (const char *)user_session_key, 16);
382 DEBUG(1, ("expected:\n"));
383 dump_data(1, (const char *)ntlmv2_session_key.data, ntlmv2_session_key.length);
384 pass = False;
385 }
386 return pass;
387}
388
389/*
390 * Test the NTLMv2 and LMv2 responses
391 */
392
393static BOOL test_lmv2_ntlmv2(void)
394{
395 return test_lmv2_ntlmv2_broken(BREAK_NONE);
396}
397
398/*
399 * Test the LMv2 response only
400 */
401
402static BOOL test_lmv2(void)
403{
404 return test_lmv2_ntlmv2_broken(NO_NT);
405}
406
407/*
408 * Test the NTLMv2 response only
409 */
410
411static BOOL test_ntlmv2(void)
412{
413 return test_lmv2_ntlmv2_broken(NO_LM);
414}
415
416static BOOL test_lm_ntlm(void)
417{
418 return test_lm_ntlm_broken(BREAK_NONE);
419}
420
421static BOOL test_ntlm_lm_broken(void)
422{
423 return test_lm_ntlm_broken(BREAK_LM);
424}
425
426static BOOL test_ntlm_ntlm_broken(void)
427{
428 return test_lm_ntlm_broken(BREAK_NT);
429}
430
431static BOOL test_ntlmv2_lmv2_broken(void)
432{
433 return test_lmv2_ntlmv2_broken(BREAK_LM);
434}
435
436static BOOL test_ntlmv2_ntlmv2_broken(void)
437{
438 return test_lmv2_ntlmv2_broken(BREAK_NT);
439}
440
441static BOOL test_plaintext(enum ntlm_break break_which)
442{
443 NTSTATUS nt_status;
444 uint32 flags = 0;
445 DATA_BLOB nt_response = data_blob(NULL, 0);
446 DATA_BLOB lm_response = data_blob(NULL, 0);
447 char *password;
448 smb_ucs2_t *nt_response_ucs2;
449
450 uchar user_session_key[16];
451 uchar lm_key[16];
452 static const uchar zeros[8] = { 0, };
453 DATA_BLOB chall = data_blob(zeros, sizeof(zeros));
454 char *error_string;
455
456 ZERO_STRUCT(user_session_key);
457
458 flags |= WBFLAG_PAM_LMKEY;
459 flags |= WBFLAG_PAM_USER_SESSION_KEY;
460
461 if ((push_ucs2_allocate(&nt_response_ucs2, opt_password)) == -1) {
462 DEBUG(0, ("push_ucs2_allocate failed!\n"));
463 exit(1);
464 }
465
466 nt_response.data = (unsigned char *)nt_response_ucs2;
467 nt_response.length = strlen_w(nt_response_ucs2)*sizeof(smb_ucs2_t);
468
469 if ((password = strdup_upper(opt_password)) == NULL) {
470 DEBUG(0, ("strdup_upper failed!\n"));
471 exit(1);
472 }
473
474 if ((convert_string_allocate(NULL, CH_UNIX,
475 CH_DOS, password,
476 strlen(password)+1,
477 &lm_response.data,True)) == -1) {
478 DEBUG(0, ("convert_string_allocate failed!\n"));
479 exit(1);
480 }
481
482 SAFE_FREE(password);
483
484 lm_response.length = strlen((const char *)lm_response.data);
485
486 switch (break_which) {
487 case BREAK_NONE:
488 break;
489 case BREAK_LM:
490 lm_response.data[0]++;
491 break;
492 case BREAK_NT:
493 nt_response.data[0]++;
494 break;
495 case NO_LM:
496 SAFE_FREE(lm_response.data);
497 lm_response.length = 0;
498 break;
499 case NO_NT:
500 SAFE_FREE(nt_response.data);
501 nt_response.length = 0;
502 break;
503 }
504
505 nt_status = contact_winbind_auth_crap(opt_username, opt_domain,
506 opt_workstation,
507 &chall,
508 &lm_response,
509 &nt_response,
510 flags,
511 lm_key,
512 user_session_key,
513 &error_string, NULL);
514
515 SAFE_FREE(nt_response.data);
516 SAFE_FREE(lm_response.data);
517 data_blob_free(&chall);
518
519 if (!NT_STATUS_IS_OK(nt_status)) {
520 d_printf("%s (0x%x)\n",
521 error_string,
522 NT_STATUS_V(nt_status));
523 SAFE_FREE(error_string);
524 return break_which == BREAK_NT;
525 }
526
527 return break_which != BREAK_NT;
528}
529
530static BOOL test_plaintext_none_broken(void) {
531 return test_plaintext(BREAK_NONE);
532}
533
534static BOOL test_plaintext_lm_broken(void) {
535 return test_plaintext(BREAK_LM);
536}
537
538static BOOL test_plaintext_nt_broken(void) {
539 return test_plaintext(BREAK_NT);
540}
541
542static BOOL test_plaintext_nt_only(void) {
543 return test_plaintext(NO_LM);
544}
545
546static BOOL test_plaintext_lm_only(void) {
547 return test_plaintext(NO_NT);
548}
549
550/*
551 Tests:
552
553 - LM only
554 - NT and LM
555 - NT
556 - NT in LM field
557 - NT in both fields
558 - NTLMv2
559 - NTLMv2 and LMv2
560 - LMv2
561 - plaintext tests (in challenge-response feilds)
562
563 check we get the correct session key in each case
564 check what values we get for the LM session key
565
566*/
567
568static const struct ntlm_tests {
569 BOOL (*fn)(void);
570 const char *name;
571} test_table[] = {
572 {test_lm, "LM"},
573 {test_lm_ntlm, "LM and NTLM"},
574 {test_ntlm, "NTLM"},
575 {test_ntlm_in_lm, "NTLM in LM"},
576 {test_ntlm_in_both, "NTLM in both"},
577 {test_ntlmv2, "NTLMv2"},
578 {test_lmv2_ntlmv2, "NTLMv2 and LMv2"},
579 {test_lmv2, "LMv2"},
580 {test_ntlmv2_lmv2_broken, "NTLMv2 and LMv2, LMv2 broken"},
581 {test_ntlmv2_ntlmv2_broken, "NTLMv2 and LMv2, NTLMv2 broken"},
582 {test_ntlm_lm_broken, "NTLM and LM, LM broken"},
583 {test_ntlm_ntlm_broken, "NTLM and LM, NTLM broken"},
584 {test_plaintext_none_broken, "Plaintext"},
585 {test_plaintext_lm_broken, "Plaintext LM broken"},
586 {test_plaintext_nt_broken, "Plaintext NT broken"},
587 {test_plaintext_nt_only, "Plaintext NT only"},
588 {test_plaintext_lm_only, "Plaintext LM only"},
589 {NULL, NULL}
590};
591
592BOOL diagnose_ntlm_auth(void)
593{
594 unsigned int i;
595 BOOL pass = True;
596
597 for (i=0; test_table[i].fn; i++) {
598 if (!test_table[i].fn()) {
599 DEBUG(1, ("Test %s failed!\n", test_table[i].name));
600 pass = False;
601 }
602 }
603
604 return pass;
605}
606
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