1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
|
/*
Unix SMB/CIFS implementation.
Copyright (C) Jelmer Vernooij 2005
Copyright (C) Tim Potter 2001
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/filesys.h"
#include "include/secrets.h"
#include "lib/ldb/include/ldb.h"
#include "librpc/gen_ndr/ndr_samr.h" /* for struct samrPassword */
#include "system/kerberos.h"
#include "auth/kerberos/kerberos.h"
/**
* Create a new credentials structure
* @param mem_ctx TALLOC_CTX parent for credentials structure
*/
struct cli_credentials *cli_credentials_init(TALLOC_CTX *mem_ctx)
{
struct cli_credentials *cred = talloc(mem_ctx, struct cli_credentials);
if (!cred) {
return cred;
}
cred->netlogon_creds = NULL;
cred->machine_account_pending = False;
cred->workstation_obtained = CRED_UNINITIALISED;
cred->username_obtained = CRED_UNINITIALISED;
cred->password_obtained = CRED_UNINITIALISED;
cred->domain_obtained = CRED_UNINITIALISED;
cred->realm_obtained = CRED_UNINITIALISED;
cred->ccache_obtained = CRED_UNINITIALISED;
cred->principal_obtained = CRED_UNINITIALISED;
return cred;
}
/**
* Obtain the username for this credentials context.
* @param cred credentials context
* @retval The username set on this context.
* @note Return value will never be NULL except by programmer error.
*/
const char *cli_credentials_get_username(struct cli_credentials *cred, TALLOC_CTX *mem_ctx)
{
if (cred->machine_account_pending) {
cli_credentials_set_machine_account(cred);
}
/* If we have a principal set on this, we want to login with "" domain and user@realm */
if (cred->username_obtained < cred->principal_obtained) {
return cli_credentials_get_principal(cred, mem_ctx);
}
if (cred->username_obtained == CRED_CALLBACK) {
cred->username = cred->username_cb(cred);
cred->username_obtained = CRED_SPECIFIED;
}
return talloc_reference(mem_ctx, cred->username);
}
BOOL cli_credentials_set_username(struct cli_credentials *cred, const char *val, enum credentials_obtained obtained)
{
if (obtained >= cred->username_obtained) {
cred->username = talloc_strdup(cred, val);
cred->username_obtained = obtained;
return True;
}
return False;
}
/**
* Obtain the client principal for this credentials context.
* @param cred credentials context
* @retval The username set on this context.
* @note Return value will never be NULL except by programmer error.
*/
const char *cli_credentials_get_principal(struct cli_credentials *cred, TALLOC_CTX *mem_ctx)
{
if (cred->machine_account_pending) {
cli_credentials_set_machine_account(cred);
}
if (cred->principal_obtained == CRED_CALLBACK) {
cred->principal = cred->principal_cb(cred);
cred->principal_obtained = CRED_SPECIFIED;
}
if (cred->principal_obtained < cred->username_obtained) {
return talloc_asprintf(mem_ctx, "%s@%s",
cli_credentials_get_username(cred, mem_ctx),
cli_credentials_get_realm(cred));
}
return talloc_reference(mem_ctx, cred->principal);
}
BOOL cli_credentials_set_principal(struct cli_credentials *cred, const char *val, enum credentials_obtained obtained)
{
if (obtained >= cred->principal_obtained) {
cred->principal = talloc_strdup(cred, val);
cred->principal_obtained = obtained;
return True;
}
return False;
}
BOOL cli_credentials_authentication_requested(struct cli_credentials *cred)
{
if (cred->principal_obtained == CRED_SPECIFIED) {
return True;
}
if (cred->username_obtained >= CRED_SPECIFIED) {
return True;
}
return False;
}
/**
* Obtain the password for this credentials context.
* @param cred credentials context
* @retval If set, the cleartext password, otherwise NULL
*/
const char *cli_credentials_get_password(struct cli_credentials *cred)
{
if (cred->machine_account_pending) {
cli_credentials_set_machine_account(cred);
}
if (cred->password_obtained == CRED_CALLBACK) {
cred->password = cred->password_cb(cred);
cred->password_obtained = CRED_SPECIFIED;
}
return cred->password;
}
BOOL cli_credentials_set_password(struct cli_credentials *cred, const char *val, enum credentials_obtained obtained)
{
if (obtained >= cred->password_obtained) {
cred->password = talloc_strdup(cred, val);
cred->password_obtained = obtained;
cred->nt_hash = NULL;
return True;
}
return False;
}
/**
* Obtain the password for this credentials context.
* @param cred credentials context
* @retval If set, the cleartext password, otherwise NULL
*/
const struct samr_Password *cli_credentials_get_nt_hash(struct cli_credentials *cred,
TALLOC_CTX *mem_ctx)
{
const char *password = cli_credentials_get_password(cred);
if (password) {
struct samr_Password *nt_hash = talloc(mem_ctx, struct samr_Password);
if (!nt_hash) {
return NULL;
}
E_md4hash(password, nt_hash->hash);
return nt_hash;
} else {
return cred->nt_hash;
}
}
BOOL cli_credentials_set_nt_hash(struct cli_credentials *cred,
const struct samr_Password *nt_hash,
enum credentials_obtained obtained)
{
if (obtained >= cred->password_obtained) {
cli_credentials_set_password(cred, NULL, obtained);
cred->nt_hash = talloc(cred, struct samr_Password);
*cred->nt_hash = *nt_hash;
return True;
}
return False;
}
int cli_credentials_set_from_ccache(struct cli_credentials *cred,
enum credentials_obtained obtained)
{
krb5_principal princ;
krb5_error_code ret;
char *name;
char **realm;
ret = krb5_cc_get_principal(cred->ccache->smb_krb5_context->krb5_context,
cred->ccache->ccache, &princ);
if (ret) {
char *err_mess = smb_get_krb5_error_message(cred->ccache->smb_krb5_context->krb5_context, ret, cred);
DEBUG(1,("failed to get principal from ccache: %s\n",
err_mess));
talloc_free(err_mess);
return ret;
}
ret = krb5_unparse_name(cred->ccache->smb_krb5_context->krb5_context, princ, &name);
if (ret) {
char *err_mess = smb_get_krb5_error_message(cred->ccache->smb_krb5_context->krb5_context, ret, cred);
DEBUG(1,("failed to unparse principal from ccache: %s\n",
err_mess));
talloc_free(err_mess);
return ret;
}
realm = krb5_princ_realm(cred->ccache->smb_krb5_context->krb5_context, princ);
cli_credentials_set_realm(cred, *realm, obtained);
cli_credentials_set_principal(cred, name, obtained);
free(name);
krb5_free_principal(cred->ccache->smb_krb5_context->krb5_context, princ);
cred->ccache_obtained = obtained;
return 0;
}
static int free_mccache(void *ptr) {
struct ccache_container *ccc = ptr;
krb5_cc_destroy(ccc->smb_krb5_context->krb5_context, ccc->ccache);
return 0;
}
static int free_dccache(void *ptr) {
struct ccache_container *ccc = ptr;
krb5_cc_close(ccc->smb_krb5_context->krb5_context, ccc->ccache);
return 0;
}
static int cli_credentials_set_ccache(struct cli_credentials *cred,
const char *name,
enum credentials_obtained obtained)
{
krb5_error_code ret;
krb5_principal princ;
struct ccache_container *ccc = talloc(cred, struct ccache_container);
if (!ccc) {
return ENOMEM;
}
ret = smb_krb5_init_context(ccc, &ccc->smb_krb5_context);
if (ret) {
talloc_free(ccc);
return ret;
}
if (name) {
ret = krb5_cc_resolve(ccc->smb_krb5_context->krb5_context, name, &ccc->ccache);
if (ret) {
DEBUG(1,("failed to read krb5 ccache: %s: %s\n",
name,
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccc);
return ret;
}
} else {
ret = krb5_cc_default(ccc->smb_krb5_context->krb5_context, &ccc->ccache);
if (ret) {
DEBUG(1,("failed to read default krb5 ccache: %s\n",
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccc);
return ret;
}
}
talloc_set_destructor(ccc, free_dccache);
ret = krb5_cc_get_principal(ccc->smb_krb5_context->krb5_context, ccc->ccache, &princ);
if (ret) {
DEBUG(1,("failed to get principal from default ccache: %s\n",
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccc);
return ret;
}
krb5_free_principal(ccc->smb_krb5_context->krb5_context, princ);
cred->ccache = ccc;
talloc_steal(cred, ccc);
ret = cli_credentials_set_from_ccache(cred, obtained);
if (ret) {
return ret;
}
return 0;
}
int cli_credentials_new_ccache(struct cli_credentials *cred)
{
krb5_error_code ret;
char *rand_string;
struct ccache_container *ccc = talloc(cred, struct ccache_container);
char *ccache_name;
if (!ccc) {
return ENOMEM;
}
rand_string = generate_random_str(NULL, 16);
if (!rand_string) {
talloc_free(ccc);
return ENOMEM;
}
ccache_name = talloc_asprintf(ccc, "MEMORY:%s",
rand_string);
talloc_free(rand_string);
if (!ccache_name) {
talloc_free(ccc);
return ENOMEM;
}
ret = smb_krb5_init_context(ccc, &ccc->smb_krb5_context);
if (ret) {
talloc_free(ccache_name);
talloc_free(ccc);
return ret;
}
ret = krb5_cc_resolve(ccc->smb_krb5_context->krb5_context, ccache_name, &ccc->ccache);
if (ret) {
DEBUG(1,("failed to generate a new krb5 ccache (%s): %s\n",
ccache_name,
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccache_name);
talloc_free(ccc);
return ret;
}
talloc_set_destructor(ccc, free_mccache);
cred->ccache = ccc;
talloc_steal(cred, ccc);
talloc_free(ccache_name);
return ret;
}
int cli_credentials_get_ccache(struct cli_credentials *cred, struct ccache_container **ccc)
{
krb5_error_code ret;
if (cred->ccache_obtained >= (MAX(cred->principal_obtained,
cred->username_obtained))) {
*ccc = cred->ccache;
return 0;
}
if (cli_credentials_is_anonymous(cred)) {
return EINVAL;
}
ret = cli_credentials_new_ccache(cred);
if (ret) {
return ret;
}
ret = kinit_to_ccache(cred, cred, cred->ccache->smb_krb5_context, cred->ccache->ccache);
if (ret) {
return ret;
}
ret = cli_credentials_set_from_ccache(cred, cred->principal_obtained);
if (ret) {
return ret;
}
*ccc = cred->ccache;
return ret;
}
/**
* Obtain the 'short' or 'NetBIOS' domain for this credentials context.
* @param cred credentials context
* @retval The domain set on this context.
* @note Return value will never be NULL except by programmer error.
*/
const char *cli_credentials_get_domain(struct cli_credentials *cred)
{
if (cred->machine_account_pending) {
cli_credentials_set_machine_account(cred);
}
/* If we have a principal set on this, we want to login with "" domain and user@realm */
if (cred->domain_obtained < cred->principal_obtained) {
return "";
}
if (cred->domain_obtained == CRED_CALLBACK) {
cred->domain = cred->domain_cb(cred);
cred->domain_obtained = CRED_SPECIFIED;
}
return cred->domain;
}
BOOL cli_credentials_set_domain(struct cli_credentials *cred, const char *val, enum credentials_obtained obtained)
{
if (obtained >= cred->domain_obtained) {
cred->domain = talloc_strdup(cred, val);
cred->domain_obtained = obtained;
return True;
}
return False;
}
/**
* Obtain the Kerberos realm for this credentials context.
* @param cred credentials context
* @retval The realm set on this context.
* @note Return value will never be NULL except by programmer error.
*/
const char *cli_credentials_get_realm(struct cli_credentials *cred)
{
if (cred->machine_account_pending) {
cli_credentials_set_machine_account(cred);
}
if (cred->realm_obtained == CRED_CALLBACK) {
cred->realm = cred->realm_cb(cred);
cred->realm_obtained = CRED_SPECIFIED;
}
return cred->realm;
}
/**
* Set the realm for this credentials context, and force it to
* uppercase for the sainity of our local kerberos libraries
*/
BOOL cli_credentials_set_realm(struct cli_credentials *cred, const char *val, enum credentials_obtained obtained)
{
if (obtained >= cred->realm_obtained) {
cred->realm = strupper_talloc(cred, val);
cred->realm_obtained = obtained;
return True;
}
return False;
}
/**
* Obtain the 'short' or 'NetBIOS' workstation name for this credentials context.
*
* @param cred credentials context
* @retval The workstation name set on this context.
* @note Return value will never be NULL except by programmer error.
*/
const char *cli_credentials_get_workstation(struct cli_credentials *cred)
{
if (cred->workstation_obtained == CRED_CALLBACK) {
cred->workstation = cred->workstation_cb(cred);
cred->workstation_obtained = CRED_SPECIFIED;
}
return cred->workstation;
}
BOOL cli_credentials_set_workstation(struct cli_credentials *cred, const char *val, enum credentials_obtained obtained)
{
if (obtained >= cred->workstation_obtained) {
cred->workstation = talloc_strdup(cred, val);
cred->workstation_obtained = obtained;
return True;
}
return False;
}
/**
* Read a file descriptor, and parse it for a password (eg from a file or stdin)
*
* @param credentials Credentials structure on which to set the password
* @param fd open file descriptor to read the password from
* @param obtained This enum describes how 'specified' this password is
*/
BOOL cli_credentials_parse_password_fd(struct cli_credentials *credentials, int fd, enum credentials_obtained obtained)
{
char *p;
char pass[128];
for(p = pass, *p = '\0'; /* ensure that pass is null-terminated */
p && p - pass < sizeof(pass);) {
switch (read(fd, p, 1)) {
case 1:
if (*p != '\n' && *p != '\0') {
*++p = '\0'; /* advance p, and null-terminate pass */
break;
}
case 0:
if (p - pass) {
*p = '\0'; /* null-terminate it, just in case... */
p = NULL; /* then force the loop condition to become false */
break;
} else {
fprintf(stderr, "Error reading password from file descriptor %d: %s\n", fd, "empty password\n");
return False;
}
default:
fprintf(stderr, "Error reading password from file descriptor %d: %s\n",
fd, strerror(errno));
return False;
}
}
cli_credentials_set_password(credentials, pass, obtained);
return True;
}
/**
* Read a named file, and parse it for a password
*
* @param credentials Credentials structure on which to set the password
* @param file a named file to read the password from
* @param obtained This enum describes how 'specified' this password is
*/
BOOL cli_credentials_parse_password_file(struct cli_credentials *credentials, const char *file, enum credentials_obtained obtained)
{
int fd = open(file, O_RDONLY, 0);
BOOL ret;
if (fd < 0) {
fprintf(stderr, "Error opening PASSWD_FILE %s: %s\n",
file, strerror(errno));
return False;
}
ret = cli_credentials_parse_password_fd(credentials, fd, obtained);
close(fd);
return ret;
}
/**
* Read a named file, and parse it for username, domain, realm and password
*
* @param credentials Credentials structure on which to set the password
* @param file a named file to read the details from
* @param obtained This enum describes how 'specified' this password is
*/
BOOL cli_credentials_parse_file(struct cli_credentials *cred, const char *file, enum credentials_obtained obtained)
{
XFILE *auth;
char buf[128];
uint16_t len = 0;
char *ptr, *val, *param;
if ((auth=x_fopen(file, O_RDONLY, 0)) == NULL)
{
/* fail if we can't open the credentials file */
d_printf("ERROR: Unable to open credentials file!\n");
return False;
}
while (!x_feof(auth))
{
/* get a line from the file */
if (!x_fgets(buf, sizeof(buf), auth))
continue;
len = strlen(buf);
if ((len) && (buf[len-1]=='\n'))
{
buf[len-1] = '\0';
len--;
}
if (len == 0)
continue;
/* break up the line into parameter & value.
* will need to eat a little whitespace possibly */
param = buf;
if (!(ptr = strchr_m (buf, '=')))
continue;
val = ptr+1;
*ptr = '\0';
/* eat leading white space */
while ((*val!='\0') && ((*val==' ') || (*val=='\t')))
val++;
if (strwicmp("password", param) == 0) {
cli_credentials_set_password(cred, val, obtained);
} else if (strwicmp("username", param) == 0) {
cli_credentials_set_username(cred, val, obtained);
} else if (strwicmp("domain", param) == 0) {
cli_credentials_set_domain(cred, val, obtained);
} else if (strwicmp("realm", param) == 0) {
cli_credentials_set_realm(cred, val, obtained);
}
memset(buf, 0, sizeof(buf));
}
x_fclose(auth);
return True;
}
/**
* Given a string, typically obtained from a -U argument, parse it into domain, username, realm and password fields
*
* The format accepted is [domain\\]user[%password] or user[@realm][%password]
*
* @param credentials Credentials structure on which to set the password
* @param data the string containing the username, password etc
* @param obtained This enum describes how 'specified' this password is
*/
void cli_credentials_parse_string(struct cli_credentials *credentials, const char *data, enum credentials_obtained obtained)
{
char *uname, *p;
if (strcmp("%",data) == 0) {
cli_credentials_set_anonymous(credentials);
return;
}
uname = talloc_strdup(credentials, data);
if ((p = strchr_m(uname,'%'))) {
*p = 0;
cli_credentials_set_password(credentials, p+1, obtained);
}
if ((p = strchr_m(uname,'@'))) {
cli_credentials_set_principal(credentials, uname, obtained);
*p = 0;
cli_credentials_set_realm(credentials, p+1, obtained);
return;
} else if ((p = strchr_m(uname,'\\')) || (p = strchr_m(uname, '/'))) {
*p = 0;
cli_credentials_set_domain(credentials, uname, obtained);
uname = p+1;
}
cli_credentials_set_username(credentials, uname, obtained);
}
/**
* Specifies default values for domain, workstation and realm
* from the smb.conf configuration file
*
* @param cred Credentials structure to fill in
*/
void cli_credentials_set_conf(struct cli_credentials *cred)
{
cli_credentials_set_username(cred, "", CRED_UNINITIALISED);
cli_credentials_set_domain(cred, lp_workgroup(), CRED_UNINITIALISED);
cli_credentials_set_workstation(cred, lp_netbios_name(), CRED_UNINITIALISED);
cli_credentials_set_realm(cred, lp_realm(), CRED_UNINITIALISED);
}
/**
* Guess defaults for credentials from environment variables,
* and from the configuration file
*
* @param cred Credentials structure to fill in
*/
void cli_credentials_guess(struct cli_credentials *cred)
{
char *p;
cli_credentials_set_conf(cred);
if (getenv("LOGNAME")) {
cli_credentials_set_username(cred, getenv("LOGNAME"), CRED_GUESS_ENV);
}
if (getenv("USER")) {
cli_credentials_parse_string(cred, getenv("USER"), CRED_GUESS_ENV);
if ((p = strchr_m(getenv("USER"),'%'))) {
memset(p,0,strlen(cred->password));
}
}
if (getenv("DOMAIN")) {
cli_credentials_set_domain(cred, getenv("DOMAIN"), CRED_GUESS_ENV);
}
if (getenv("PASSWD")) {
cli_credentials_set_password(cred, getenv("PASSWD"), CRED_GUESS_ENV);
}
if (getenv("PASSWD_FD")) {
cli_credentials_parse_password_fd(cred, atoi(getenv("PASSWD_FD")), CRED_GUESS_FILE);
}
if (getenv("PASSWD_FILE")) {
cli_credentials_parse_password_file(cred, getenv("PASSWD_FILE"), CRED_GUESS_FILE);
}
cli_credentials_set_ccache(cred, NULL, CRED_GUESS_FILE);
}
/**
* Fill in credentials for the machine trust account, from the secrets database.
*
* @param cred Credentials structure to fill in
* @retval NTSTATUS error detailing any failure
*/
NTSTATUS cli_credentials_set_machine_account(struct cli_credentials *cred)
{
TALLOC_CTX *mem_ctx;
struct ldb_context *ldb;
int ldb_ret;
struct ldb_message **msgs;
const char *attrs[] = {
"secret",
"samAccountName",
"flatname",
"realm",
"secureChannelType",
"ntPwdHash",
"msDS-KeyVersionNumber",
NULL
};
const char *machine_account;
const char *password;
const char *domain;
const char *realm;
enum netr_SchannelType sct;
/* ok, we are going to get it now, don't recurse back here */
cred->machine_account_pending = False;
mem_ctx = talloc_named(cred, 0, "cli_credentials fetch machine password");
/* Local secrets are stored in secrets.ldb */
ldb = secrets_db_connect(mem_ctx);
if (!ldb) {
DEBUG(1, ("Could not open secrets.ldb\n"));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
/* search for the secret record */
ldb_ret = gendb_search(ldb,
mem_ctx, ldb_dn_explode(mem_ctx, SECRETS_PRIMARY_DOMAIN_DN),
&msgs, attrs,
SECRETS_PRIMARY_DOMAIN_FILTER,
cli_credentials_get_domain(cred));
if (ldb_ret == 0) {
DEBUG(1, ("Could not find join record to domain: %s\n",
cli_credentials_get_domain(cred)));
talloc_free(mem_ctx);
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
} else if (ldb_ret != 1) {
DEBUG(1, ("Found more than one (%d) join records to domain: %s\n",
ldb_ret, cli_credentials_get_domain(cred)));
talloc_free(mem_ctx);
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
password = ldb_msg_find_string(msgs[0], "secret", NULL);
machine_account = ldb_msg_find_string(msgs[0], "samAccountName", NULL);
if (!machine_account) {
DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n",
cli_credentials_get_domain(cred)));
talloc_free(mem_ctx);
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
sct = ldb_msg_find_int(msgs[0], "secureChannelType", 0);
if (!sct) {
DEBUG(1, ("Domain join for acocunt %s did not have a secureChannelType set!\n",
machine_account));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
if (!password) {
const struct ldb_val *nt_password_hash = ldb_msg_find_ldb_val(msgs[0], "ntPwdHash");
struct samr_Password hash;
ZERO_STRUCT(hash);
if (nt_password_hash) {
memcpy(hash.hash, nt_password_hash->data,
MIN(nt_password_hash->length, sizeof(hash.hash)));
cli_credentials_set_nt_hash(cred, &hash, CRED_SPECIFIED);
} else {
DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n",
cli_credentials_get_domain(cred)));
talloc_free(mem_ctx);
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
}
cli_credentials_set_secure_channel_type(cred, sct);
domain = ldb_msg_find_string(msgs[0], "flatname", NULL);
if (domain) {
cli_credentials_set_domain(cred, domain, CRED_SPECIFIED);
}
realm = ldb_msg_find_string(msgs[0], "realm", NULL);
if (realm) {
cli_credentials_set_realm(cred, realm, CRED_SPECIFIED);
}
cli_credentials_set_username(cred, machine_account, CRED_SPECIFIED);
if (password) {
cli_credentials_set_password(cred, password, CRED_SPECIFIED);
}
cli_credentials_set_kvno(cred, ldb_msg_find_int(msgs[0], "msDS-KeyVersionNumber", 0));
talloc_free(mem_ctx);
return NT_STATUS_OK;
}
/**
* Ask that when required, the credentials system will be filled with
* machine trust account, from the secrets database.
*
* @param cred Credentials structure to fill in
* @note This function is used to call the above function after, rather
* than during, popt processing.
*
*/
void cli_credentials_set_machine_account_pending(struct cli_credentials *cred)
{
cred->machine_account_pending = True;
}
/**
* Attach NETLOGON credentials for use with SCHANNEL
*/
void cli_credentials_set_netlogon_creds(struct cli_credentials *cred,
struct creds_CredentialState *netlogon_creds)
{
cred->netlogon_creds = talloc_reference(cred, netlogon_creds);
}
/**
* Return attached NETLOGON credentials
*/
struct creds_CredentialState *cli_credentials_get_netlogon_creds(struct cli_credentials *cred)
{
return cred->netlogon_creds;
}
/**
* Set NETLOGON secure channel type
*/
void cli_credentials_set_secure_channel_type(struct cli_credentials *cred,
enum netr_SchannelType secure_channel_type)
{
cred->secure_channel_type = secure_channel_type;
}
/**
* Return NETLOGON secure chanel type
*/
enum netr_SchannelType cli_credentials_get_secure_channel_type(struct cli_credentials *cred)
{
return cred->secure_channel_type;
}
/**
* Set Kerberos KVNO
*/
void cli_credentials_set_kvno(struct cli_credentials *cred,
int kvno)
{
cred->kvno = kvno;
}
/**
* Return Kerberos KVNO
*/
int cli_credentials_get_kvno(struct cli_credentials *cred)
{
return cred->kvno;
}
/**
* Fill in a credentials structure as the anonymous user
*/
void cli_credentials_set_anonymous(struct cli_credentials *cred)
{
cli_credentials_set_username(cred, "", CRED_SPECIFIED);
cli_credentials_set_domain(cred, "", CRED_SPECIFIED);
cli_credentials_set_password(cred, NULL, CRED_SPECIFIED);
}
/**
* Describe a credentials context as anonymous or authenticated
* @retval True if anonymous, False if a username is specified
*/
BOOL cli_credentials_is_anonymous(struct cli_credentials *cred)
{
TALLOC_CTX *tmp_ctx = talloc_new(cred);
const char *username = cli_credentials_get_username(cred, tmp_ctx);
/* Yes, it is deliberate that we die if we have a NULL pointer
* here - anonymous is "", not NULL, which is 'never specified,
* never guessed', ie programmer bug */
if (!username[0]) {
talloc_free(tmp_ctx);
return True;
}
talloc_free(tmp_ctx);
return False;
}
|