summaryrefslogtreecommitdiff
path: root/source3/utils/net_rpc_join.c
blob: 6888076a147fda5fbf7f87d8aa596ea3109c7b42 (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
/* 
   Samba Unix/Linux SMB client library 
   Distributed SMB/CIFS Server Management Utility 
   Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)
   Copyright (C) Tim Potter     2001

   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 "utils/net.h"

/* Macro for checking RPC error codes to make things more readable */

#define CHECK_RPC_ERR(rpc, msg) \
        if (!NT_STATUS_IS_OK(result = rpc)) { \
                DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
                goto done; \
        }

#define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
        if (!NT_STATUS_IS_OK(result = rpc)) { \
                DEBUG(0, debug_args); \
                goto done; \
        }


/**
 * confirm that a domain join is still valid
 *
 * @return A shell status integer (0 for success)
 *
 **/
static int net_rpc_join_ok(const char *domain)
{
	struct cli_state *cli;
	uchar stored_md4_trust_password[16];
	int retval = 1;
	uint32 channel;

	/* Connect to remote machine */
	if (!(cli = net_make_ipc_connection(NET_FLAGS_ANONYMOUS | NET_FLAGS_PDC))) {
		return 1;
	}

	if (!cli_nt_session_open(cli, PI_NETLOGON)) {
		DEBUG(0,("Error connecting to NETLOGON pipe\n"));
		goto done;
	}

	if (!secrets_fetch_trust_account_password(domain,
						  stored_md4_trust_password, 
						  NULL, &channel)) {
		DEBUG(0,("Could not retreive domain trust secret"));
		goto done;
	}
	
	/* ensure that schannel uses the right domain */
	fstrcpy(cli->domain, domain);
	if (! NT_STATUS_IS_OK(cli_nt_establish_netlogon(cli, channel, stored_md4_trust_password))) {
		DEBUG(0,("Error in domain join verfication (fresh connection)\n"));
		goto done;
	}
	
	retval = 0;		/* Success! */
	
done:
	/* Close down pipe - this will clean up open policy handles */
	if (cli->pipes[cli->pipe_idx].fnum)
		cli_nt_session_close(cli);

	cli_shutdown(cli);

	return retval;
}

/**
 * Join a domain using the administrator username and password
 *
 * @param argc  Standard main() style argc
 * @param argc  Standard main() style argv.  Initial components are already
 *              stripped.  Currently not used.
 * @return A shell status integer (0 for success)
 *
 **/

int net_rpc_join_newstyle(int argc, const char **argv) 
{

	/* libsmb variables */

	struct cli_state *cli;
	TALLOC_CTX *mem_ctx;
        uint32 acb_info = ACB_WSTRUST;
	uint32 sec_channel_type;

	/* rpc variables */

	POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
	DOM_SID *domain_sid;
	uint32 user_rid;

	/* Password stuff */

	char *clear_trust_password = NULL;
	uchar pwbuf[516];
	SAM_USERINFO_CTR ctr;
	SAM_USER_INFO_24 p24;
	SAM_USER_INFO_10 p10;
	uchar md4_trust_password[16];

	/* Misc */

	NTSTATUS result;
	int retval = 1;
	char *domain;
	uint32 num_rids, *name_types, *user_rids;
	uint32 flags = 0x3e8;
	char *acct_name;
	const char *const_acct_name;

	/* check what type of join */
	if (argc >= 0) {
		sec_channel_type = get_sec_channel_type(argv[0]);
	} else {
		sec_channel_type = get_sec_channel_type(NULL);
	}

	switch (sec_channel_type) {
	case SEC_CHAN_WKSTA:
		acb_info = ACB_WSTRUST;
		break;
	case SEC_CHAN_BDC:
		acb_info = ACB_SVRTRUST;
		break;
#if 0
	case SEC_CHAN_DOMAIN:
		acb_info = ACB_DOMTRUST;
		break;
#endif
	}

	/* Connect to remote machine */

	if (!(cli = net_make_ipc_connection(NET_FLAGS_PDC))) 
		return 1;

	if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
		DEBUG(0, ("Could not initialise talloc context\n"));
		goto done;
	}

	/* Fetch domain sid */

	if (!cli_nt_session_open(cli, PI_LSARPC)) {
		DEBUG(0, ("Error connecting to LSA pipe\n"));
		goto done;
	}


	CHECK_RPC_ERR(cli_lsa_open_policy(cli, mem_ctx, True,
					  SEC_RIGHTS_MAXIMUM_ALLOWED,
					  &lsa_pol),
		      "error opening lsa policy handle");

	CHECK_RPC_ERR(cli_lsa_query_info_policy(cli, mem_ctx, &lsa_pol,
						5, &domain, &domain_sid),
		      "error querying info policy");

	cli_lsa_close(cli, mem_ctx, &lsa_pol);

	cli_nt_session_close(cli); /* Done with this pipe */

	/* Create domain user */
	if (!cli_nt_session_open(cli, PI_SAMR)) {
		DEBUG(0, ("Error connecting to SAM pipe\n"));
		goto done;
	}

	CHECK_RPC_ERR(cli_samr_connect(cli, mem_ctx, 
				       SEC_RIGHTS_MAXIMUM_ALLOWED,
				       &sam_pol),
		      "could not connect to SAM database");

	
	CHECK_RPC_ERR(cli_samr_open_domain(cli, mem_ctx, &sam_pol,
					   SEC_RIGHTS_MAXIMUM_ALLOWED,
					   domain_sid, &domain_pol),
		      "could not open domain");

	/* Create domain user */
	acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname()); 
	strlower_m(acct_name);
	const_acct_name = acct_name;

	result = cli_samr_create_dom_user(cli, mem_ctx, &domain_pol,
					  acct_name, acb_info,
					  0xe005000b, &user_pol, 
					  &user_rid);

	if (!NT_STATUS_IS_OK(result) && 
	    !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
		d_printf("Creation of workstation account failed\n");

		/* If NT_STATUS_ACCESS_DENIED then we have a valid
		   username/password combo but the user does not have
		   administrator access. */

		if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
			d_printf("User specified does not have administrator privileges\n");

		goto done;
	}

	/* We *must* do this.... don't ask... */

	if (NT_STATUS_IS_OK(result))
		cli_samr_close(cli, mem_ctx, &user_pol);

	CHECK_RPC_ERR_DEBUG(cli_samr_lookup_names(cli, mem_ctx,
						  &domain_pol, flags,
						  1, &const_acct_name, 
						  &num_rids,
						  &user_rids, &name_types),
			    ("error looking up rid for user %s: %s\n",
			     acct_name, nt_errstr(result)));

	if (name_types[0] != SID_NAME_USER) {
		DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types[0]));
		goto done;
	}

	user_rid = user_rids[0];
		
	/* Open handle on user */

	CHECK_RPC_ERR_DEBUG(
		cli_samr_open_user(cli, mem_ctx, &domain_pol,
				   SEC_RIGHTS_MAXIMUM_ALLOWED,
				   user_rid, &user_pol),
		("could not re-open existing user %s: %s\n",
		 acct_name, nt_errstr(result)));
	
	/* Create a random machine account password */

	{ 
		char *str;
		str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
		clear_trust_password = SMB_STRDUP(str);
		E_md4hash(clear_trust_password, md4_trust_password);
	}

	encode_pw_buffer(pwbuf, clear_trust_password, STR_UNICODE);

	/* Set password on machine account */

	ZERO_STRUCT(ctr);
	ZERO_STRUCT(p24);

	init_sam_user_info24(&p24, (char *)pwbuf,24);

	ctr.switch_value = 24;
	ctr.info.id24 = &p24;

	CHECK_RPC_ERR(cli_samr_set_userinfo(cli, mem_ctx, &user_pol, 24, 
					    &cli->user_session_key, &ctr),
		      "error setting trust account password");

	/* Why do we have to try to (re-)set the ACB to be the same as what
	   we passed in the samr_create_dom_user() call?  When a NT
	   workstation is joined to a domain by an administrator the
	   acb_info is set to 0x80.  For a normal user with "Add
	   workstations to the domain" rights the acb_info is 0x84.  I'm
	   not sure whether it is supposed to make a difference or not.  NT
	   seems to cope with either value so don't bomb out if the set
	   userinfo2 level 0x10 fails.  -tpot */

	ZERO_STRUCT(ctr);
	ctr.switch_value = 0x10;
	ctr.info.id10 = &p10;

	init_sam_user_info10(&p10, acb_info);

	/* Ignoring the return value is necessary for joining a domain
	   as a normal user with "Add workstation to domain" privilege. */

	result = cli_samr_set_userinfo2(cli, mem_ctx, &user_pol, 0x10, 
					&cli->user_session_key, &ctr);

	/* Now check the whole process from top-to-bottom */
	cli_samr_close(cli, mem_ctx, &user_pol);
	cli_nt_session_close(cli); /* Done with this pipe */

	if (!cli_nt_session_open(cli, PI_NETLOGON)) {
		DEBUG(0,("Error connecting to NETLOGON pipe\n"));
		goto done;
	}

	/* ensure that schannel uses the right domain */
	fstrcpy(cli->domain, domain);

	result = cli_nt_establish_netlogon(cli, sec_channel_type, 
					   md4_trust_password);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(0, ("Error domain join verification (reused connection): %s\n\n",
			  nt_errstr(result)));

		if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
		     (sec_channel_type == SEC_CHAN_BDC) ) {
			d_printf("Please make sure that no computer account\n"
				 "named like this machine (%s) exists in the domain\n",
				 global_myname());
		}

		goto done;
	}

	/* Now store the secret in the secrets database */

	strupper_m(domain);

	if (!secrets_store_domain_sid(domain, domain_sid)) {
		DEBUG(0, ("error storing domain sid for %s\n", domain));
		goto done;
	}

	if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
		DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
	}

	/* double-check, connection from scratch */
	retval = net_rpc_join_ok(domain);
	
done:
	/* Close down pipe - this will clean up open policy handles */

	if (cli->pipes[cli->pipe_idx].fnum)
		cli_nt_session_close(cli);

	/* Display success or failure */

	if (retval != 0) {
		fprintf(stderr,"Unable to join domain %s.\n",domain);
	} else {
		printf("Joined domain %s.\n",domain);
	}
	
	cli_shutdown(cli);

	SAFE_FREE(clear_trust_password);

	return retval;
}


/**
 * check that a join is OK
 *
 * @return A shell status integer (0 for success)
 *
 **/
int net_rpc_testjoin(int argc, const char **argv) 
{
	char *domain = smb_xstrdup(opt_target_workgroup);

	/* Display success or failure */
	if (net_rpc_join_ok(domain) != 0) {
		fprintf(stderr,"Join to domain '%s' is not valid\n",domain);
		free(domain);
		return -1;
	}

	printf("Join to '%s' is OK\n",domain);
	free(domain);
	return 0;
}