summaryrefslogtreecommitdiff
path: root/auth/auth_sam_reply.c
blob: 59fcf7ad5d3affef0e5e9c5a9985e983233b9423 (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
/*
   Unix SMB/CIFS implementation.

   Convert a server info struct into the form for PAC and NETLOGON replies

   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2011
   Copyright (C) Stefan Metzmacher <metze@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 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 "librpc/gen_ndr/auth.h"
#include "libcli/security/security.h"
#include "auth/auth_sam_reply.h"

NTSTATUS auth_convert_user_info_dc_sambaseinfo(TALLOC_CTX *mem_ctx,
					      struct auth_user_info_dc *user_info_dc,
					      struct netr_SamBaseInfo **_sam)
{
	NTSTATUS status;
	struct auth_user_info *info;
	struct netr_SamBaseInfo *sam = talloc_zero(mem_ctx, struct netr_SamBaseInfo);
	NT_STATUS_HAVE_NO_MEMORY(sam);

	if (user_info_dc->num_sids > PRIMARY_USER_SID_INDEX) {
		status = dom_sid_split_rid(sam, &user_info_dc->sids[PRIMARY_USER_SID_INDEX],
					   &sam->domain_sid, &sam->rid);
		if (!NT_STATUS_IS_OK(status)) {
			return status;
		}
	} else {
		return NT_STATUS_INVALID_PARAMETER;
	}

	if (user_info_dc->num_sids > PRIMARY_GROUP_SID_INDEX) {
		status = dom_sid_split_rid(NULL, &user_info_dc->sids[PRIMARY_GROUP_SID_INDEX],
					   NULL, &sam->primary_gid);
		if (!NT_STATUS_IS_OK(status)) {
			return status;
		}
	} else {
		/* if we have to encode something like SYSTEM (with no
		 * second SID in the token) then this is the only
		 * choice */
		sam->primary_gid = sam->rid;
	}

	info = user_info_dc->info;

	sam->last_logon = info->last_logon;
	sam->last_logoff =  info->last_logoff;
	sam->acct_expiry = info->acct_expiry;
	sam->last_password_change = info->last_password_change;
	sam->allow_password_change = info->allow_password_change;
	sam->force_password_change = info->force_password_change;

	sam->account_name.string = info->account_name;
	sam->full_name.string = info->full_name;
	sam->logon_script.string = info->logon_script;
	sam->profile_path.string = info->profile_path;
	sam->home_directory.string = info->home_directory;
	sam->home_drive.string = info->home_drive;

	sam->logon_count = info->logon_count;
	sam->bad_password_count = info->bad_password_count;
	sam->groups.count = 0;
	sam->groups.rids = NULL;

	if (user_info_dc->num_sids > 2) {
		size_t i;
		sam->groups.rids = talloc_array(sam, struct samr_RidWithAttribute,
						user_info_dc->num_sids);

		if (sam->groups.rids == NULL)
			return NT_STATUS_NO_MEMORY;

		for (i=2; i<user_info_dc->num_sids; i++) {
			struct dom_sid *group_sid = &user_info_dc->sids[i];
			if (!dom_sid_in_domain(sam->domain_sid, group_sid)) {
				/* We handle this elsewhere */
				continue;
			}
			sam->groups.rids[sam->groups.count].rid =
				group_sid->sub_auths[group_sid->num_auths-1];

			sam->groups.rids[sam->groups.count].attributes =
				SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
			sam->groups.count += 1;
		}
	}

	sam->user_flags = 0; /* w2k3 uses NETLOGON_EXTRA_SIDS | NETLOGON_NTLMV2_ENABLED */
	if (!user_info_dc->info->authenticated) {
		sam->user_flags |= NETLOGON_GUEST;
	}
	sam->acct_flags = user_info_dc->info->acct_flags;
	sam->logon_server.string = user_info_dc->info->logon_server;
	sam->domain.string = user_info_dc->info->domain_name;

	ZERO_STRUCT(sam->unknown);

	ZERO_STRUCT(sam->key);
	if (user_info_dc->user_session_key.length == sizeof(sam->key.key)) {
		memcpy(sam->key.key, user_info_dc->user_session_key.data, sizeof(sam->key.key));
	}

	ZERO_STRUCT(sam->LMSessKey);
	if (user_info_dc->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
		memcpy(sam->LMSessKey.key, user_info_dc->lm_session_key.data,
		       sizeof(sam->LMSessKey.key));
	}

	*_sam = sam;

	return NT_STATUS_OK;
}

/* Note that the validity of the _sam3 structure is only as long as
 * the user_info_dc it was generated from */
NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
					   struct auth_user_info_dc *user_info_dc,
					   struct netr_SamInfo3 **_sam3)
{
	struct netr_SamBaseInfo *sam;
	struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
	NTSTATUS status;
	size_t i;
	NT_STATUS_HAVE_NO_MEMORY(sam3);

	status = auth_convert_user_info_dc_sambaseinfo(sam3, user_info_dc, &sam);
	if (!NT_STATUS_IS_OK(status)) {
		talloc_free(sam3);
		return status;
	}
	sam3->base = *sam;
	sam3->sidcount	= 0;
	sam3->sids	= NULL;


	sam3->sids = talloc_array(sam, struct netr_SidAttr,
				  user_info_dc->num_sids);
	NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids, sam3);

	/* We don't put the user and group SIDs in there */
	for (i=2; i<user_info_dc->num_sids; i++) {
		if (dom_sid_in_domain(sam->domain_sid, &user_info_dc->sids[i])) {
			continue;
		}
		sam3->sids[sam3->sidcount].sid = dom_sid_dup(sam3->sids, &user_info_dc->sids[i]);
		NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids[sam3->sidcount].sid, sam3);
		sam3->sids[sam3->sidcount].attributes =
			SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
		sam3->sidcount += 1;
	}
	if (sam3->sidcount) {
		sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
	} else {
		sam3->sids = NULL;
	}
	*_sam3 = sam3;

	return NT_STATUS_OK;
}

/**
 * Make a user_info struct from the info3 or similar returned by a domain logon.
 *
 * The netr_SamInfo3 is also a key structure in the source3 auth subsystem
 */

NTSTATUS make_user_info_SamBaseInfo(TALLOC_CTX *mem_ctx,
				    const char *account_name,
				    struct netr_SamBaseInfo *base,
				    bool authenticated,
				    struct auth_user_info **_user_info)
{
	struct auth_user_info *info;

	info = talloc_zero(mem_ctx, struct auth_user_info);
	NT_STATUS_HAVE_NO_MEMORY(info);

	if (base->account_name.string) {
		info->account_name = talloc_strdup(info, base->account_name.string);
	} else {
		info->account_name = talloc_strdup(info, account_name);
	}
	NT_STATUS_HAVE_NO_MEMORY(info->account_name);

	if (base->domain.string) {
		info->domain_name = talloc_strdup(info, base->domain.string);
		NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
	}

	if (base->full_name.string) {
		info->full_name = talloc_strdup(info, base->full_name.string);
		NT_STATUS_HAVE_NO_MEMORY(info->full_name);
	}
	if (base->logon_script.string) {
		info->logon_script = talloc_strdup(info, base->logon_script.string);
		NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
	}
	if (base->profile_path.string) {
		info->profile_path = talloc_strdup(info, base->profile_path.string);
		NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
	}
	if (base->home_directory.string) {
		info->home_directory = talloc_strdup(info, base->home_directory.string);
		NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
	}
	if (base->home_drive.string) {
		info->home_drive = talloc_strdup(info, base->home_drive.string);
		NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
	}
	if (base->logon_server.string) {
		info->logon_server = talloc_strdup(info, base->logon_server.string);
		NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
	}
	info->last_logon = base->last_logon;
	info->last_logoff = base->last_logoff;
	info->acct_expiry = base->acct_expiry;
	info->last_password_change = base->last_password_change;
	info->allow_password_change = base->allow_password_change;
	info->force_password_change = base->force_password_change;
	info->logon_count = base->logon_count;
	info->bad_password_count = base->bad_password_count;
	info->acct_flags = base->acct_flags;

	/* Only set authenticated if both NETLOGON_GUEST is not set, and authenticated is set */
	info->authenticated = (authenticated && (!(base->user_flags & NETLOGON_GUEST)));

	*_user_info = info;
	return NT_STATUS_OK;
}

/**
 * Make a user_info_dc struct from the info3 returned by a domain logon
 */
NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
					      const char *account_name,
					      uint16_t validation_level,
					      union netr_Validation *validation,
					       bool authenticated,
					      struct auth_user_info_dc **_user_info_dc)
{
	NTSTATUS status;
	struct auth_user_info_dc *user_info_dc;
	struct netr_SamBaseInfo *base = NULL;
	uint32_t i;

	switch (validation_level) {
	case 2:
		if (!validation || !validation->sam2) {
			return NT_STATUS_INVALID_PARAMETER;
		}
		base = &validation->sam2->base;
		break;
	case 3:
		if (!validation || !validation->sam3) {
			return NT_STATUS_INVALID_PARAMETER;
		}
		base = &validation->sam3->base;
		break;
	case 6:
		if (!validation || !validation->sam6) {
			return NT_STATUS_INVALID_PARAMETER;
		}
		base = &validation->sam6->base;
		break;
	default:
		return NT_STATUS_INVALID_LEVEL;
	}

	user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
	NT_STATUS_HAVE_NO_MEMORY(user_info_dc);

	/*
	   Here is where we should check the list of
	   trusted domains, and verify that the SID
	   matches.
	*/
	if (!base->domain_sid) {
		DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
		return NT_STATUS_INVALID_PARAMETER;
	}

	/* The IDL layer would be a better place to check this, but to
	 * guard the integer addition below, we double-check */
	if (base->groups.count > 65535) {
		return NT_STATUS_INVALID_PARAMETER;
	}

	user_info_dc->num_sids = 2;

	user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
	NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);

	user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
	if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
		return NT_STATUS_INVALID_PARAMETER;
	}

	user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
	if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
		return NT_STATUS_INVALID_PARAMETER;
	}

	for (i = 0; i < base->groups.count; i++) {
		user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
		if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
			return NT_STATUS_INVALID_PARAMETER;
		}
		user_info_dc->num_sids++;
	}

	/* Copy 'other' sids.  We need to do sid filtering here to
	   prevent possible elevation of privileges.  See:

           http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
         */

	if (validation_level == 3) {
		struct dom_sid *dgrps = user_info_dc->sids;
		size_t sidcount;

		/* The IDL layer would be a better place to check this, but to
		 * guard the integer addition below, we double-check */
		if (validation->sam3->sidcount > 65535) {
			return NT_STATUS_INVALID_PARAMETER;
		}

		sidcount = user_info_dc->num_sids + validation->sam3->sidcount;
		if (validation->sam3->sidcount > 0) {
			dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid, sidcount);
			NT_STATUS_HAVE_NO_MEMORY(dgrps);

			for (i = 0; i < validation->sam3->sidcount; i++) {
				if (validation->sam3->sids[i].sid) {
					dgrps[user_info_dc->num_sids] = *validation->sam3->sids[i].sid;
					user_info_dc->num_sids++;
				}
			}
		}

		user_info_dc->sids = dgrps;

		/* Where are the 'global' sids?... */
	}

	status = make_user_info_SamBaseInfo(user_info_dc, account_name, base, authenticated, &user_info_dc->info);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	/* ensure we are never given NULL session keys */

	if (all_zero(base->key.key, sizeof(base->key.key))) {
		user_info_dc->user_session_key = data_blob(NULL, 0);
	} else {
		user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
		NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
	}

	if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
		user_info_dc->lm_session_key = data_blob(NULL, 0);
	} else {
		user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
		NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
	}

	*_user_info_dc = user_info_dc;
	return NT_STATUS_OK;
}

/**
 * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 */
NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
			      struct PAC_LOGON_INFO *pac_logon_info,
			      struct auth_user_info_dc **_user_info_dc)
{
	uint32_t i;
	NTSTATUS nt_status;
	union netr_Validation validation;
	struct auth_user_info_dc *user_info_dc;

	validation.sam3 = &pac_logon_info->info3;

	nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation,
							  true, /* This user was authenticated */
							  &user_info_dc);
	if (!NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	}

	if (pac_logon_info->res_groups.count > 0) {
		size_t sidcount;
		/* The IDL layer would be a better place to check this, but to
		 * guard the integer addition below, we double-check */
		if (pac_logon_info->res_groups.count > 65535) {
			talloc_free(user_info_dc);
			return NT_STATUS_INVALID_PARAMETER;
		}

		/*
		  Here is where we should check the list of
		  trusted domains, and verify that the SID
		  matches.
		*/
		if (!pac_logon_info->res_group_dom_sid) {
			DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
			return NT_STATUS_INVALID_PARAMETER;
		}

		sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
		user_info_dc->sids
			= talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
		NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->sids, user_info_dc);

		for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
			user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
			if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
					    pac_logon_info->res_groups.rids[i].rid)) {
				return NT_STATUS_INVALID_PARAMETER;
			}
			user_info_dc->num_sids++;
		}
	}
	*_user_info_dc = user_info_dc;
	return NT_STATUS_OK;
}