summaryrefslogtreecommitdiff
path: root/source4/libnet/libnet_join.c
blob: 71bef3135fa188b33a53444b9962aaf4af41b181 (plain)
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
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
/* 
   Unix SMB/CIFS implementation.
   
   Copyright (C) Stefan Metzmacher	2004
   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   Copyright (C) Brad Henry 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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "libnet/libnet.h"
#include "librpc/gen_ndr/ndr_drsuapi_c.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "param/secrets.h"
#include "dsdb/samdb/samdb.h"
#include "ldb_wrap.h"
#include "../lib/util/util_ldb.h"
#include "libcli/security/security.h"
#include "auth/credentials/credentials.h"
#include "auth/credentials/credentials_krb5.h"
#include "librpc/gen_ndr/ndr_samr_c.h"
#include "param/param.h"
#include "param/provision.h"

/*
 * complete a domain join, when joining to a AD domain:
 * 1.) connect and bind to the DRSUAPI pipe
 * 2.) do a DsCrackNames() to find the machine account dn
 * 3.) connect to LDAP
 * 4.) do an ldap search to find the "msDS-KeyVersionNumber" of the machine account
 * 5.) set the servicePrincipalName's of the machine account via LDAP, (maybe we should use DsWriteAccountSpn()...)
 * 6.) do a DsCrackNames() to find the domain dn
 * 7.) find out Site specific stuff, look at libnet_JoinSite() for details
 */
static NTSTATUS libnet_JoinADSDomain(struct libnet_context *ctx, struct libnet_JoinDomain *r)
{
	NTSTATUS status;

	TALLOC_CTX *tmp_ctx;

	const char *realm = r->out.realm;

	struct dcerpc_binding *samr_binding = r->out.samr_binding;

	struct dcerpc_pipe *drsuapi_pipe;
	struct dcerpc_binding *drsuapi_binding;
	struct drsuapi_DsBind r_drsuapi_bind;
	struct drsuapi_DsCrackNames r_crack_names;
	struct drsuapi_DsNameString names[1];
	struct policy_handle drsuapi_bind_handle;
	struct GUID drsuapi_bind_guid;

	struct ldb_context *remote_ldb;
	struct ldb_dn *account_dn;
	const char *account_dn_str;
	const char *remote_ldb_url;
	struct ldb_result *res;
	struct ldb_message *msg;

	int ret, rtn;

	const char * const attrs[] = {
		"msDS-KeyVersionNumber",
		"servicePrincipalName",
		"dNSHostName",
		"objectGUID",
		NULL,
	};

	r->out.error_string = NULL;
	
	/* We need to convert between a samAccountName and domain to a
	 * DN in the directory.  The correct way to do this is with
	 * DRSUAPI CrackNames */

	/* Fiddle with the bindings, so get to DRSUAPI on
	 * NCACN_IP_TCP, sealed */
	tmp_ctx = talloc_named(r, 0, "libnet_JoinADSDomain temp context");  
	if (!tmp_ctx) {
		r->out.error_string = NULL;
		return NT_STATUS_NO_MEMORY;
	}
	                                           
	drsuapi_binding = talloc(tmp_ctx, struct dcerpc_binding);
	if (!drsuapi_binding) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}
	
	*drsuapi_binding = *samr_binding;

	/* DRSUAPI is only available on IP_TCP, and locally on NCALRPC */
	if (drsuapi_binding->transport != NCALRPC) {
		drsuapi_binding->transport = NCACN_IP_TCP;
	}
	drsuapi_binding->endpoint = NULL;
	drsuapi_binding->flags |= DCERPC_SEAL;

	status = dcerpc_pipe_connect_b(tmp_ctx, 
				       &drsuapi_pipe,
				       drsuapi_binding,
				       &ndr_table_drsuapi,
				       ctx->cred, 
				       ctx->event_ctx,
				       ctx->lp_ctx);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(r,
					"Connection to DRSUAPI pipe of PDC of domain '%s' failed: %s",
					r->out.domain_name,
					nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}

	/* get a DRSUAPI pipe handle */
	GUID_from_string(DRSUAPI_DS_BIND_GUID, &drsuapi_bind_guid);

	r_drsuapi_bind.in.bind_guid = &drsuapi_bind_guid;
	r_drsuapi_bind.in.bind_info = NULL;
	r_drsuapi_bind.out.bind_handle = &drsuapi_bind_handle;

	status = dcerpc_drsuapi_DsBind(drsuapi_pipe, tmp_ctx, &r_drsuapi_bind);
	if (!NT_STATUS_IS_OK(status)) {
		if (NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
			r->out.error_string
				= talloc_asprintf(r,
						  "dcerpc_drsuapi_DsBind failed - %s", 
						  dcerpc_errstr(tmp_ctx, drsuapi_pipe->last_fault_code));
			talloc_free(tmp_ctx);
			return status;
		} else {
			r->out.error_string
				= talloc_asprintf(r,
						  "dcerpc_drsuapi_DsBind failed - %s", 
						  nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}
	} else if (!W_ERROR_IS_OK(r_drsuapi_bind.out.result)) {
		r->out.error_string
				= talloc_asprintf(r,
						  "DsBind failed - %s", 
						  win_errstr(r_drsuapi_bind.out.result));
			talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	}

	/* Actually 'crack' the names */
	ZERO_STRUCT(r_crack_names);
	r_crack_names.in.bind_handle		= &drsuapi_bind_handle;
	r_crack_names.in.level			= 1;
	r_crack_names.in.req			= talloc(r, union drsuapi_DsNameRequest);
	if (!r_crack_names.in.req) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}
	r_crack_names.in.req->req1.codepage	= 1252; /* western european */
	r_crack_names.in.req->req1.language	= 0x00000407; /* german */
	r_crack_names.in.req->req1.count	= 1;
	r_crack_names.in.req->req1.names	= names;
	r_crack_names.in.req->req1.format_flags	= DRSUAPI_DS_NAME_FLAG_NO_FLAGS;
	r_crack_names.in.req->req1.format_offered = DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY;
	r_crack_names.in.req->req1.format_desired = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
	names[0].str = dom_sid_string(tmp_ctx, r->out.account_sid);
	if (!names[0].str) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	r_crack_names.out.ctr			= talloc(r, union drsuapi_DsNameCtr);
	r_crack_names.out.level_out		= talloc(r, int32_t);
	if (!r_crack_names.out.ctr || !r_crack_names.out.level_out) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	status = dcerpc_drsuapi_DsCrackNames(drsuapi_pipe, tmp_ctx, &r_crack_names);
	if (!NT_STATUS_IS_OK(status)) {
		if (NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
			r->out.error_string
				= talloc_asprintf(r,
						  "dcerpc_drsuapi_DsCrackNames for [%s] failed - %s", 
						  names[0].str,
						  dcerpc_errstr(tmp_ctx, drsuapi_pipe->last_fault_code));
			talloc_free(tmp_ctx);
			return status;
		} else {
			r->out.error_string
				= talloc_asprintf(r,
						  "dcerpc_drsuapi_DsCrackNames for [%s] failed - %s", 
						  names[0].str,
						  nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}
	} else if (!W_ERROR_IS_OK(r_crack_names.out.result)) {
		r->out.error_string
				= talloc_asprintf(r,
						  "DsCrackNames failed - %s", win_errstr(r_crack_names.out.result));
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	} else if (*r_crack_names.out.level_out != 1
		   || !r_crack_names.out.ctr->ctr1
		   || r_crack_names.out.ctr->ctr1->count != 1) {
		r->out.error_string = talloc_asprintf(r, "DsCrackNames failed");
		talloc_free(tmp_ctx);
		return NT_STATUS_INVALID_PARAMETER;
	} else if (r_crack_names.out.ctr->ctr1->array[0].status != DRSUAPI_DS_NAME_STATUS_OK) {
		r->out.error_string = talloc_asprintf(r, "DsCrackNames failed: %d", r_crack_names.out.ctr->ctr1->array[0].status);
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	} else if (r_crack_names.out.ctr->ctr1->array[0].result_name == NULL) {
		r->out.error_string = talloc_asprintf(r, "DsCrackNames failed: no result name");
		talloc_free(tmp_ctx);
		return NT_STATUS_INVALID_PARAMETER;
	}

	/* Store the DN of our machine account. */
	account_dn_str = r_crack_names.out.ctr->ctr1->array[0].result_name;

	/* Now we know the user's DN, open with LDAP, read and modify a few things */

	remote_ldb_url = talloc_asprintf(tmp_ctx, "ldap://%s", 
					 drsuapi_binding->target_hostname);
	if (!remote_ldb_url) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	remote_ldb = ldb_wrap_connect(tmp_ctx, ctx->event_ctx, ctx->lp_ctx, 
				      remote_ldb_url, 
				      NULL, ctx->cred, 0);
	if (!remote_ldb) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	}

	account_dn = ldb_dn_new(tmp_ctx, remote_ldb, account_dn_str);
	if (! ldb_dn_validate(account_dn)) {
		r->out.error_string = talloc_asprintf(r, "Invalid account dn: %s",
						      account_dn_str);
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	}

	/* search for the user's record */
	ret = ldb_search(remote_ldb, tmp_ctx, &res,
			 account_dn, LDB_SCOPE_BASE, attrs, NULL);
	if (ret != LDB_SUCCESS) {
		r->out.error_string = talloc_asprintf(r, "ldb_search for %s failed - %s",
						      account_dn_str, ldb_errstring(remote_ldb));
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	}

	if (res->count != 1) {
		r->out.error_string = talloc_asprintf(r, "ldb_search for %s failed - found %d entries",
						      account_dn_str, res->count);
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	}

	/* Prepare a new message, for the modify */
	msg = ldb_msg_new(tmp_ctx);
	if (!msg) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}
	msg->dn = res->msgs[0]->dn;

	{
		int i;
		const char *service_principal_name[6];
		const char *dns_host_name = strlower_talloc(tmp_ctx, 
							    talloc_asprintf(tmp_ctx, 
									    "%s.%s", 
									    r->in.netbios_name, 
									    realm));

		if (!dns_host_name) {
			r->out.error_string = NULL;
			talloc_free(tmp_ctx);
			return NT_STATUS_NO_MEMORY;
		}

		service_principal_name[0] = talloc_asprintf(tmp_ctx, "host/%s", dns_host_name);
		service_principal_name[1] = talloc_asprintf(tmp_ctx, "host/%s", strlower_talloc(tmp_ctx, r->in.netbios_name));
		service_principal_name[2] = talloc_asprintf(tmp_ctx, "host/%s/%s", dns_host_name, realm);
		service_principal_name[3] = talloc_asprintf(tmp_ctx, "host/%s/%s", strlower_talloc(tmp_ctx, r->in.netbios_name), realm);
		service_principal_name[4] = talloc_asprintf(tmp_ctx, "host/%s/%s", dns_host_name, r->out.domain_name);
		service_principal_name[5] = talloc_asprintf(tmp_ctx, "host/%s/%s", strlower_talloc(tmp_ctx, r->in.netbios_name), r->out.domain_name);
		
		for (i=0; i < ARRAY_SIZE(service_principal_name); i++) {
			if (!service_principal_name[i]) {
				r->out.error_string = NULL;
				talloc_free(tmp_ctx);
				return NT_STATUS_NO_MEMORY;
			}
			rtn = samdb_msg_add_string(remote_ldb, tmp_ctx, msg, "servicePrincipalName", service_principal_name[i]);
			if (rtn == -1) {
				r->out.error_string = NULL;
				talloc_free(tmp_ctx);
				return NT_STATUS_NO_MEMORY;
			}
		}

		rtn = samdb_msg_add_string(remote_ldb, tmp_ctx, msg, "dNSHostName", dns_host_name);
		if (rtn == -1) {
			r->out.error_string = NULL;
			talloc_free(tmp_ctx);
			return NT_STATUS_NO_MEMORY;
		}

		rtn = dsdb_replace(remote_ldb, msg, 0);
		if (rtn != 0) {
			r->out.error_string
				= talloc_asprintf(r, 
						  "Failed to replace entries on %s", 
						  ldb_dn_get_linearized(msg->dn));
			talloc_free(tmp_ctx);
			return NT_STATUS_INTERNAL_DB_CORRUPTION;
		}
	}
				
	/* DsCrackNames to find out the DN of the domain. */
	r_crack_names.in.req->req1.format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
	r_crack_names.in.req->req1.format_desired = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
	names[0].str = talloc_asprintf(tmp_ctx, "%s\\", r->out.domain_name);
	if (!names[0].str) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	status = dcerpc_drsuapi_DsCrackNames(drsuapi_pipe, tmp_ctx, &r_crack_names);
	if (!NT_STATUS_IS_OK(status)) {
		if (NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
			r->out.error_string
				= talloc_asprintf(r,
						  "dcerpc_drsuapi_DsCrackNames for [%s] failed - %s", 
						  r->in.domain_name, 
						  dcerpc_errstr(tmp_ctx, drsuapi_pipe->last_fault_code));
			talloc_free(tmp_ctx);
			return status;
		} else {
			r->out.error_string
				= talloc_asprintf(r,
						  "dcerpc_drsuapi_DsCrackNames for [%s] failed - %s", 
						  r->in.domain_name, 
						  nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}
	} else if (!W_ERROR_IS_OK(r_crack_names.out.result)) {
		r->out.error_string
			= talloc_asprintf(r,
					  "DsCrackNames failed - %s", win_errstr(r_crack_names.out.result));
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	} else if (*r_crack_names.out.level_out != 1
		   || !r_crack_names.out.ctr->ctr1
		   || r_crack_names.out.ctr->ctr1->count != 1
		   || !r_crack_names.out.ctr->ctr1->array[0].result_name
		   || r_crack_names.out.ctr->ctr1->array[0].status != DRSUAPI_DS_NAME_STATUS_OK) {
		r->out.error_string = talloc_asprintf(r, "DsCrackNames failed");
		talloc_free(tmp_ctx);
		return NT_STATUS_UNSUCCESSFUL;
	}

	/* Store the account DN. */
	r->out.account_dn_str = account_dn_str;
	talloc_steal(r, account_dn_str);

	/* Store the domain DN. */
	r->out.domain_dn_str = r_crack_names.out.ctr->ctr1->array[0].result_name;
	talloc_steal(r, r_crack_names.out.ctr->ctr1->array[0].result_name);

	/* Store the KVNO of the account, critical for some kerberos
	 * operations */
	r->out.kvno = ldb_msg_find_attr_as_uint(res->msgs[0], "msDS-KeyVersionNumber", 0);

	/* Store the account GUID. */
	r->out.account_guid = samdb_result_guid(res->msgs[0], "objectGUID");

	if (r->in.acct_type == ACB_SVRTRUST) {
		status = libnet_JoinSite(ctx, remote_ldb, r);
	}
	talloc_free(tmp_ctx);

	return status;
}

/*
 * do a domain join using DCERPC/SAMR calls
 * - connect to the LSA pipe, to try and find out information about the domain
 * - create a secondary connection to SAMR pipe
 * - do a samr_Connect to get a policy handle
 * - do a samr_LookupDomain to get the domain sid
 * - do a samr_OpenDomain to get a domain handle
 * - do a samr_CreateAccount to try and get a new account 
 * 
 * If that fails, do:
 * - do a samr_LookupNames to get the users rid
 * - do a samr_OpenUser to get a user handle
 * - potentially delete and recreate the user
 * - assert the account is of the right type with samrQueryUserInfo
 * 
 * - call libnet_SetPassword_samr_handle to set the password,
 *   and pass a samr_UserInfo21 struct to set full_name and the account flags
 *
 * - do some ADS specific things when we join as Domain Controller,
 *    look at libnet_joinADSDomain() for the details
 */
NTSTATUS libnet_JoinDomain(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_JoinDomain *r)
{
	TALLOC_CTX *tmp_ctx;

	NTSTATUS status, cu_status;

	struct libnet_RpcConnect *connect_with_info;
	struct dcerpc_pipe *samr_pipe;

	struct samr_Connect sc;
	struct policy_handle p_handle;
	struct samr_OpenDomain od;
	struct policy_handle d_handle;
	struct samr_LookupNames ln;
	struct samr_Ids rids, types;
	struct samr_OpenUser ou;
	struct samr_CreateUser2 cu;
	struct policy_handle *u_handle = NULL;
	struct samr_QueryUserInfo qui;
	union samr_UserInfo *uinfo;
	struct samr_UserInfo21 u_info21;
	union libnet_SetPassword r2;
	struct samr_GetUserPwInfo pwp;
	struct samr_PwInfo info;
	struct lsa_String samr_account_name;
	
	uint32_t acct_flags, old_acct_flags;
	uint32_t rid, access_granted;
	int policy_min_pw_len = 0;

	struct dom_sid *account_sid = NULL;
	const char *password_str = NULL;
	
	r->out.error_string = NULL;
	r2.samr_handle.out.error_string = NULL;
	
	tmp_ctx = talloc_named(mem_ctx, 0, "libnet_Join temp context");
	if (!tmp_ctx) {
		r->out.error_string = NULL;
		return NT_STATUS_NO_MEMORY;
	}
	
	u_handle = talloc(tmp_ctx, struct policy_handle);
	if (!u_handle) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}
	
	connect_with_info = talloc_zero(tmp_ctx, struct libnet_RpcConnect);
	if (!connect_with_info) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	/* prepare connect to the SAMR pipe of PDC */
	if (r->in.level == LIBNET_JOINDOMAIN_AUTOMATIC) {
		connect_with_info->in.binding = NULL;
		connect_with_info->in.name    = r->in.domain_name;
	} else {
		connect_with_info->in.binding = r->in.binding;
		connect_with_info->in.name    = NULL;
	}

	/* This level makes a connection to the LSA pipe on the way,
	 * to get some useful bits of information about the domain */
	connect_with_info->level              = LIBNET_RPC_CONNECT_DC_INFO;
	connect_with_info->in.dcerpc_iface    = &ndr_table_samr;

	/*
	  establish the SAMR connection
	*/
	status = libnet_RpcConnect(ctx, tmp_ctx, connect_with_info);
	if (!NT_STATUS_IS_OK(status)) {
		if (r->in.binding) {
			r->out.error_string = talloc_asprintf(mem_ctx,
							      "Connection to SAMR pipe of DC %s failed: %s",
							      r->in.binding, connect_with_info->out.error_string);
		} else {
			r->out.error_string = talloc_asprintf(mem_ctx,
							      "Connection to SAMR pipe of PDC for %s failed: %s",
							      r->in.domain_name, connect_with_info->out.error_string);
		}
		talloc_free(tmp_ctx);
		return status;
	}

	samr_pipe = connect_with_info->out.dcerpc_pipe;

	status = dcerpc_pipe_auth(tmp_ctx, &samr_pipe,
				  connect_with_info->out.dcerpc_pipe->binding, 
				  &ndr_table_samr, ctx->cred, ctx->lp_ctx);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx,
						"SAMR bind failed: %s",
						nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}

	/* prepare samr_Connect */
	ZERO_STRUCT(p_handle);
	sc.in.system_name = NULL;
	sc.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
	sc.out.connect_handle = &p_handle;

	/* 2. do a samr_Connect to get a policy handle */
	status = dcerpc_samr_Connect(samr_pipe, tmp_ctx, &sc);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx,
						"samr_Connect failed: %s",
						nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}

	/* If this is a connection on ncacn_ip_tcp to Win2k3 SP1, we don't get back this useful info */
	if (!connect_with_info->out.domain_name) {
		if (r->in.level == LIBNET_JOINDOMAIN_AUTOMATIC) {
			connect_with_info->out.domain_name = talloc_strdup(tmp_ctx, r->in.domain_name);
		} else {
			/* Bugger, we just lost our way to automatically find the domain name */
			connect_with_info->out.domain_name = talloc_strdup(tmp_ctx, lp_workgroup(ctx->lp_ctx));
			connect_with_info->out.realm = talloc_strdup(tmp_ctx, lp_realm(ctx->lp_ctx));
		}
	}

	/* Perhaps we didn't get a SID above, because we are against ncacn_ip_tcp */
	if (!connect_with_info->out.domain_sid) {
		struct lsa_String name;
		struct samr_LookupDomain l;
		struct dom_sid2 *sid = NULL;
		name.string = connect_with_info->out.domain_name;
		l.in.connect_handle = &p_handle;
		l.in.domain_name = &name;
		l.out.sid = &sid;
		
		status = dcerpc_samr_LookupDomain(samr_pipe, tmp_ctx, &l);
		if (!NT_STATUS_IS_OK(status)) {
			r->out.error_string = talloc_asprintf(mem_ctx,
							      "SAMR LookupDomain failed: %s",
							      nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}
		connect_with_info->out.domain_sid = *l.out.sid;
	}

	/* prepare samr_OpenDomain */
	ZERO_STRUCT(d_handle);
	od.in.connect_handle = &p_handle;
	od.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
	od.in.sid = connect_with_info->out.domain_sid;
	od.out.domain_handle = &d_handle;

	/* do a samr_OpenDomain to get a domain handle */
	status = dcerpc_samr_OpenDomain(samr_pipe, tmp_ctx, &od);			
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx,
						      "samr_OpenDomain for [%s] failed: %s",
						      dom_sid_string(tmp_ctx, connect_with_info->out.domain_sid),
						      nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}
	
	/* prepare samr_CreateUser2 */
	ZERO_STRUCTP(u_handle);
	cu.in.domain_handle  = &d_handle;
	cu.in.access_mask     = SEC_FLAG_MAXIMUM_ALLOWED;
	samr_account_name.string = r->in.account_name;
	cu.in.account_name    = &samr_account_name;
	cu.in.acct_flags      = r->in.acct_type;
	cu.out.user_handle    = u_handle;
	cu.out.rid            = &rid;
	cu.out.access_granted = &access_granted;

	/* do a samr_CreateUser2 to get an account handle, or an error */
	cu_status = dcerpc_samr_CreateUser2(samr_pipe, tmp_ctx, &cu);			
	status = cu_status;
	if (NT_STATUS_EQUAL(status, NT_STATUS_USER_EXISTS)) {
		/* prepare samr_LookupNames */
		ln.in.domain_handle = &d_handle;
		ln.in.num_names = 1;
		ln.in.names = talloc_array(tmp_ctx, struct lsa_String, 1);
		ln.out.rids = &rids;
		ln.out.types = &types;
		if (!ln.in.names) {
			r->out.error_string = NULL;
			talloc_free(tmp_ctx);
			return NT_STATUS_NO_MEMORY;
		}
		ln.in.names[0].string = r->in.account_name;
		
		/* 5. do a samr_LookupNames to get the users rid */
		status = dcerpc_samr_LookupNames(samr_pipe, tmp_ctx, &ln);
		if (!NT_STATUS_IS_OK(status)) {
			r->out.error_string = talloc_asprintf(mem_ctx,
						"samr_LookupNames for [%s] failed: %s",
						r->in.account_name,
						nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}
		
		/* check if we got one RID for the user */
		if (ln.out.rids->count != 1) {
			r->out.error_string = talloc_asprintf(mem_ctx,
							      "samr_LookupNames for [%s] returns %d RIDs",
							      r->in.account_name, ln.out.rids->count);
			talloc_free(tmp_ctx);
			return NT_STATUS_INVALID_PARAMETER;
		}
		
		/* prepare samr_OpenUser */
		ZERO_STRUCTP(u_handle);
		ou.in.domain_handle = &d_handle;
		ou.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
		ou.in.rid = ln.out.rids->ids[0];
		rid = ou.in.rid;
		ou.out.user_handle = u_handle;
		
		/* 6. do a samr_OpenUser to get a user handle */
		status = dcerpc_samr_OpenUser(samr_pipe, tmp_ctx, &ou); 
		if (!NT_STATUS_IS_OK(status)) {
			r->out.error_string = talloc_asprintf(mem_ctx,
							"samr_OpenUser for [%s] failed: %s",
							r->in.account_name,
							nt_errstr(status));
			talloc_free(tmp_ctx);
			return status;
		}

		if (r->in.recreate_account) {
			struct samr_DeleteUser d;
			d.in.user_handle = u_handle;
			d.out.user_handle = u_handle;
			status = dcerpc_samr_DeleteUser(samr_pipe, mem_ctx, &d);
			if (!NT_STATUS_IS_OK(status)) {
				r->out.error_string = talloc_asprintf(mem_ctx,
								      "samr_DeleteUser (for recreate) of [%s] failed: %s",
								      r->in.account_name,
								      nt_errstr(status));
				talloc_free(tmp_ctx);
				return status;
			}

			/* We want to recreate, so delete and another samr_CreateUser2 */
			
			/* &cu filled in above */
			status = dcerpc_samr_CreateUser2(samr_pipe, tmp_ctx, &cu);			
			if (!NT_STATUS_IS_OK(status)) {
				r->out.error_string = talloc_asprintf(mem_ctx,
								      "samr_CreateUser2 (recreate) for [%s] failed: %s",
								      r->in.account_name, nt_errstr(status));
				talloc_free(tmp_ctx);
				return status;
			}
		}
	} else if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx,
						      "samr_CreateUser2 for [%s] failed: %s",
						      r->in.account_name, nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}

	/* prepare samr_QueryUserInfo (get flags) */
	qui.in.user_handle = u_handle;
	qui.in.level = 16;
	qui.out.info = &uinfo;
	
	status = dcerpc_samr_QueryUserInfo(samr_pipe, tmp_ctx, &qui);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_asprintf(mem_ctx,
						"samr_QueryUserInfo for [%s] failed: %s",
						r->in.account_name,
						nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}
	
	if (!uinfo) {
		status = NT_STATUS_INVALID_PARAMETER;
		r->out.error_string
			= talloc_asprintf(mem_ctx,
					  "samr_QueryUserInfo failed to return qui.out.info for [%s]: %s",
					  r->in.account_name, nt_errstr(status));
		talloc_free(tmp_ctx);
		return status;
	}

	old_acct_flags = (uinfo->info16.acct_flags & (ACB_WSTRUST | ACB_SVRTRUST | ACB_DOMTRUST));
	/* Possibly bail if the account is of the wrong type */
	if (old_acct_flags
	    != r->in.acct_type) {
		const char *old_account_type, *new_account_type;
		switch (old_acct_flags) {
		case ACB_WSTRUST:
			old_account_type = "domain member (member)";
			break;
		case ACB_SVRTRUST:
			old_account_type = "domain controller (bdc)";
			break;
		case ACB_DOMTRUST:
			old_account_type = "trusted domain";
			break;
		default:
			return NT_STATUS_INVALID_PARAMETER;
		}
		switch (r->in.acct_type) {
		case ACB_WSTRUST:
			new_account_type = "domain member (member)";
			break;
		case ACB_SVRTRUST:
			new_account_type = "domain controller (bdc)";
			break;
		case ACB_DOMTRUST:
			new_account_type = "trusted domain";
			break;
		default:
			return NT_STATUS_INVALID_PARAMETER;
		}

		if (!NT_STATUS_EQUAL(cu_status, NT_STATUS_USER_EXISTS)) {
			/* We created a new user, but they didn't come out the right type?!? */
			r->out.error_string
				= talloc_asprintf(mem_ctx,
						  "We asked to create a new machine account (%s) of type %s, "
						  "but we got an account of type %s.  This is unexpected.  "
						  "Perhaps delete the account and try again.",
						  r->in.account_name, new_account_type, old_account_type);
			talloc_free(tmp_ctx);
			return NT_STATUS_INVALID_PARAMETER;
		} else {
			/* The account is of the wrong type, so bail */

			/* TODO: We should allow a --force option to override, and redo this from the top setting r.in.recreate_account */
			r->out.error_string
				= talloc_asprintf(mem_ctx,
						  "The machine account (%s) already exists in the domain %s, "
						  "but is a %s.  You asked to join as a %s.  Please delete "
						  "the account and try again.",
						  r->in.account_name, connect_with_info->out.domain_name, old_account_type, new_account_type);
			talloc_free(tmp_ctx);
			return NT_STATUS_USER_EXISTS;
		}
	} else {
		acct_flags = uinfo->info16.acct_flags;
	}
	
	acct_flags = (acct_flags & ~(ACB_DISABLED|ACB_PWNOTREQ));

	/* Find out what password policy this user has */
	pwp.in.user_handle = u_handle;
	pwp.out.info = &info;

	status = dcerpc_samr_GetUserPwInfo(samr_pipe, tmp_ctx, &pwp);				
	if (NT_STATUS_IS_OK(status)) {
		policy_min_pw_len = pwp.out.info->min_password_length;
	}
	
	/* Grab a password of that minimum length */
	
	password_str = generate_random_password(tmp_ctx, MAX(8, policy_min_pw_len), 255);

	/* set full_name and reset flags */
	ZERO_STRUCT(u_info21);
	u_info21.full_name.string	= r->in.account_name;
	u_info21.acct_flags		= acct_flags;
	u_info21.fields_present		= SAMR_FIELD_FULL_NAME | SAMR_FIELD_ACCT_FLAGS;

	r2.samr_handle.level		= LIBNET_SET_PASSWORD_SAMR_HANDLE;
	r2.samr_handle.in.account_name	= r->in.account_name;
	r2.samr_handle.in.newpassword	= password_str;
	r2.samr_handle.in.user_handle   = u_handle;
	r2.samr_handle.in.dcerpc_pipe   = samr_pipe;
	r2.samr_handle.in.info21	= &u_info21;

	status = libnet_SetPassword(ctx, tmp_ctx, &r2);	
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_steal(mem_ctx, r2.samr_handle.out.error_string);
		talloc_free(tmp_ctx);
		return status;
	}

	account_sid = dom_sid_add_rid(mem_ctx, connect_with_info->out.domain_sid, rid);
	if (!account_sid) {
		r->out.error_string = NULL;
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	/* Finish out by pushing various bits of status data out for the caller to use */
	r->out.join_password = password_str;
	talloc_steal(mem_ctx, r->out.join_password);

	r->out.domain_sid = connect_with_info->out.domain_sid;
	talloc_steal(mem_ctx, r->out.domain_sid);

	r->out.account_sid = account_sid;
	talloc_steal(mem_ctx, r->out.account_sid);

	r->out.domain_name = connect_with_info->out.domain_name;
	talloc_steal(mem_ctx, r->out.domain_name);
	r->out.realm = connect_with_info->out.realm;
	talloc_steal(mem_ctx, r->out.realm);
	r->out.samr_pipe = samr_pipe;
	talloc_reparent(tmp_ctx, mem_ctx, samr_pipe);
	r->out.samr_binding = samr_pipe->binding;
	talloc_steal(mem_ctx, r->out.samr_binding);
	r->out.user_handle = u_handle;
	talloc_steal(mem_ctx, u_handle);
	r->out.error_string = r2.samr_handle.out.error_string;
	talloc_steal(mem_ctx, r2.samr_handle.out.error_string);
	r->out.kvno = 0;
	r->out.server_dn_str = NULL;
	talloc_free(tmp_ctx); 

	/* Now, if it was AD, then we want to start looking changing a
	 * few more things.  Otherwise, we are done. */
	if (r->out.realm) {
		status = libnet_JoinADSDomain(ctx, r);
		return status;
	}

	return status;
}

static NTSTATUS libnet_Join_primary_domain(struct libnet_context *ctx, 
					   TALLOC_CTX *mem_ctx, 
					   struct libnet_Join *r)
{
	NTSTATUS status;
	TALLOC_CTX *tmp_mem;
	struct libnet_JoinDomain *r2;
	struct provision_store_self_join_settings *set_secrets;
	uint32_t acct_type = 0;
	const char *account_name;
	const char *netbios_name;
	const char *error_string;

	r->out.error_string = NULL;

	tmp_mem = talloc_new(mem_ctx);
	if (!tmp_mem) {
		return NT_STATUS_NO_MEMORY;
	}

	r2 = talloc(tmp_mem, struct libnet_JoinDomain);
	if (!r2) {
		r->out.error_string = NULL;
		talloc_free(tmp_mem);
		return NT_STATUS_NO_MEMORY;
	}
	
	if (r->in.join_type == SEC_CHAN_BDC) {
		acct_type = ACB_SVRTRUST;
	} else if (r->in.join_type == SEC_CHAN_WKSTA) {
		acct_type = ACB_WSTRUST;
	} else {
		r->out.error_string = NULL;
		talloc_free(tmp_mem);	
		return NT_STATUS_INVALID_PARAMETER;
	}

	if (r->in.netbios_name != NULL) {
		netbios_name = r->in.netbios_name;
	} else {
		netbios_name = talloc_strdup(tmp_mem, lp_netbios_name(ctx->lp_ctx));
		if (!netbios_name) {
			r->out.error_string = NULL;
			talloc_free(tmp_mem);
			return NT_STATUS_NO_MEMORY;
		}
	}

	account_name = talloc_asprintf(tmp_mem, "%s$", netbios_name);
	if (!account_name) {
		r->out.error_string = NULL;
		talloc_free(tmp_mem);
		return NT_STATUS_NO_MEMORY;
	}
	
	/*
	 * join the domain
	 */
	ZERO_STRUCTP(r2);
	r2->in.domain_name	= r->in.domain_name;
	r2->in.account_name	= account_name;
	r2->in.netbios_name	= netbios_name;
	r2->in.level		= LIBNET_JOINDOMAIN_AUTOMATIC;
	r2->in.acct_type	= acct_type;
	r2->in.recreate_account = false;
	status = libnet_JoinDomain(ctx, r2, r2);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_steal(mem_ctx, r2->out.error_string);
		talloc_free(tmp_mem);
		return status;
	}

	set_secrets = talloc(tmp_mem, struct provision_store_self_join_settings);
	if (!set_secrets) {
		r->out.error_string = NULL;
		talloc_free(tmp_mem);
		return NT_STATUS_NO_MEMORY;
	}
	
	ZERO_STRUCTP(set_secrets);
	set_secrets->domain_name = r2->out.domain_name;
	set_secrets->realm = r2->out.realm;
	set_secrets->account_name = account_name;
	set_secrets->netbios_name = netbios_name;
	set_secrets->secure_channel_type = r->in.join_type;
	set_secrets->machine_password = r2->out.join_password;
	set_secrets->key_version_number = r2->out.kvno;
	set_secrets->domain_sid = r2->out.domain_sid;
	
	status = provision_store_self_join(ctx, ctx->lp_ctx, ctx->event_ctx, set_secrets, &error_string);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_steal(mem_ctx, error_string);
		talloc_free(tmp_mem);
		return status;
	}

	/* move all out parameter to the callers TALLOC_CTX */
	r->out.error_string	= NULL;
	r->out.join_password	= r2->out.join_password;
	talloc_reparent(r2, mem_ctx, r2->out.join_password);
	r->out.domain_sid	= r2->out.domain_sid;
	talloc_reparent(r2, mem_ctx, r2->out.domain_sid);
	r->out.domain_name      = r2->out.domain_name;
	talloc_reparent(r2, mem_ctx, r2->out.domain_name);
	talloc_free(tmp_mem);
	return NT_STATUS_OK;
}

NTSTATUS libnet_Join(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_Join *r)
{
	switch (r->in.join_type) {
		case SEC_CHAN_WKSTA:
			return libnet_Join_primary_domain(ctx, mem_ctx, r);
		case SEC_CHAN_BDC:
			return libnet_Join_primary_domain(ctx, mem_ctx, r);
		case SEC_CHAN_DOMAIN:
		case SEC_CHAN_DNS_DOMAIN:
		case SEC_CHAN_NULL:
			break;
	}

	r->out.error_string = talloc_asprintf(mem_ctx,
					      "Invalid join type specified (%08X) attempting to join domain %s",
					      r->in.join_type, r->in.domain_name);
	return NT_STATUS_INVALID_PARAMETER;
}