summaryrefslogtreecommitdiff
path: root/libcli/security/privileges.c
blob: 57c485dbe60ec3a4e1826edd911333b0819b1fe2 (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
/*
   Unix SMB/CIFS implementation.
   Privileges handling functions
   Copyright (C) Jean François Micouleau	1998-2001
   Copyright (C) Simo Sorce			2002-2003
   Copyright (C) Gerald (Jerry) Carter          2005
   Copyright (C) Michael Adam			2007
   Copyright (C) Andrew Bartlett		2010
   Copyright (C) Andrew Tridgell                2004

   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/>.
*/

/*
 * Basic privileges functions (mask-operations and conversion
 * functions between the different formats (se_priv, privset, luid)
 * moved here * from lib/privileges.c to minimize linker deps.
 *
 * generally SID- and LUID-related code is left in lib/privileges.c
 *
 * some extra functions to hide privs array from lib/privileges.c
 */

#include "includes.h"
#include "libcli/security/privileges.h"
#include "libcli/security/privileges_private.h"
#include "librpc/gen_ndr/security.h"

/* The use of strcasecmp here is safe, all the comparison strings are ASCII */
#undef strcasecmp

#define NUM_SHORT_LIST_PRIVS 9

static const struct {
	enum sec_privilege luid;
	uint64_t privilege_mask;
	const char *name;
	const char *description;
} privs[] = {

	{SEC_PRIV_MACHINE_ACCOUNT, SEC_PRIV_MACHINE_ACCOUNT_BIT,   "SeMachineAccountPrivilege",	"Add machines to domain"},
	{SEC_PRIV_TAKE_OWNERSHIP,  SEC_PRIV_TAKE_OWNERSHIP_BIT,    "SeTakeOwnershipPrivilege",    "Take ownership of files or other objects"},
        {SEC_PRIV_BACKUP,          SEC_PRIV_BACKUP_BIT,            "SeBackupPrivilege",           "Back up files and directories"},
        {SEC_PRIV_RESTORE,         SEC_PRIV_RESTORE_BIT,           "SeRestorePrivilege",          "Restore files and directories"},
	{SEC_PRIV_REMOTE_SHUTDOWN, SEC_PRIV_REMOTE_SHUTDOWN_BIT,   "SeRemoteShutdownPrivilege",	"Force shutdown from a remote system"},

	{SEC_PRIV_PRINT_OPERATOR,  SEC_PRIV_PRINT_OPERATOR_BIT,	 "SePrintOperatorPrivilege",	"Manage printers"},
	{SEC_PRIV_ADD_USERS,       SEC_PRIV_ADD_USERS_BIT,	 "SeAddUsersPrivilege",		"Add users and groups to the domain"},
	{SEC_PRIV_DISK_OPERATOR,   SEC_PRIV_DISK_OPERATOR_BIT,	 "SeDiskOperatorPrivilege",	"Manage disk shares"},
	{SEC_PRIV_SECURITY,	   SEC_PRIV_SECURITY_BIT,	 "SeSecurityPrivilege",	"System security"},


	/* The list from here on is not displayed in the code from
	 * source3, and is after index NUM_SHORT_LIST_PRIVS for that
	 * reason */ 

	{SEC_PRIV_SYSTEMTIME,
	 SEC_PRIV_SYSTEMTIME_BIT,
	 "SeSystemtimePrivilege",
	"Set the system clock"},

	{SEC_PRIV_SHUTDOWN,
	 SEC_PRIV_SHUTDOWN_BIT,
	 "SeShutdownPrivilege",
	"Shutdown the system"},

	{SEC_PRIV_DEBUG,
	 SEC_PRIV_DEBUG_BIT,
	 "SeDebugPrivilege",
	"Debug processes"},

	{SEC_PRIV_SYSTEM_ENVIRONMENT,
	 SEC_PRIV_SYSTEM_ENVIRONMENT_BIT,
	 "SeSystemEnvironmentPrivilege",
	"Modify system environment"},

	{SEC_PRIV_SYSTEM_PROFILE,
	 SEC_PRIV_SYSTEM_PROFILE_BIT,
	 "SeSystemProfilePrivilege",
	"Profile the system"},

	{SEC_PRIV_PROFILE_SINGLE_PROCESS,
	 SEC_PRIV_PROFILE_SINGLE_PROCESS_BIT,
	 "SeProfileSingleProcessPrivilege",
	"Profile one process"},

	{SEC_PRIV_INCREASE_BASE_PRIORITY,
	 SEC_PRIV_INCREASE_BASE_PRIORITY_BIT,
	 "SeIncreaseBasePriorityPrivilege",
	 "Increase base priority"},

	{SEC_PRIV_LOAD_DRIVER,
	 SEC_PRIV_LOAD_DRIVER_BIT,
	 "SeLoadDriverPrivilege",
	"Load drivers"},

	{SEC_PRIV_CREATE_PAGEFILE,
	 SEC_PRIV_CREATE_PAGEFILE_BIT,
	 "SeCreatePagefilePrivilege",
	"Create page files"},

	{SEC_PRIV_INCREASE_QUOTA,
	 SEC_PRIV_INCREASE_QUOTA_BIT,
	 "SeIncreaseQuotaPrivilege",
	"Increase quota"},

	{SEC_PRIV_CHANGE_NOTIFY,
	 SEC_PRIV_CHANGE_NOTIFY_BIT,
	 "SeChangeNotifyPrivilege",
	"Register for change notify"},

	{SEC_PRIV_UNDOCK,
	 SEC_PRIV_UNDOCK_BIT,
	 "SeUndockPrivilege",
	"Undock devices"},

	{SEC_PRIV_MANAGE_VOLUME,
	 SEC_PRIV_MANAGE_VOLUME_BIT,
	 "SeManageVolumePrivilege",
	"Manage system volumes"},

	{SEC_PRIV_IMPERSONATE,
	 SEC_PRIV_IMPERSONATE_BIT,
	 "SeImpersonatePrivilege",
	"Impersonate users"},

	{SEC_PRIV_CREATE_GLOBAL,
	 SEC_PRIV_CREATE_GLOBAL_BIT,
	 "SeCreateGlobalPrivilege",
	"Create global"},

	{SEC_PRIV_ENABLE_DELEGATION,
	 SEC_PRIV_ENABLE_DELEGATION_BIT,
	 "SeEnableDelegationPrivilege",
	"Enable Delegation"},
};

/* These are rights, not privileges, and should not be confused.  The
 * names are very similar, and they are quite similar in behaviour,
 * but they are not to be enumerated as a system-wide list or have an
 * LUID value */
static const struct {
	uint32_t right_mask;
	const char *name;
	const char *description;
} rights[] = {
	{LSA_POLICY_MODE_INTERACTIVE,
	 "SeInteractiveLogonRight",
	"Interactive logon"},

	{LSA_POLICY_MODE_NETWORK,
	 "SeNetworkLogonRight",
	"Network logon"},

	{LSA_POLICY_MODE_REMOTE_INTERACTIVE,
	 "SeRemoteInteractiveLogonRight",
	"Remote Interactive logon"}
};

/*
  return a privilege mask given a privilege id
*/
uint64_t sec_privilege_mask(enum sec_privilege privilege)
{
	int i;
	for (i=0;i<ARRAY_SIZE(privs);i++) {
		if (privs[i].luid == privilege) {
			return privs[i].privilege_mask;
		}
	}

	return 0;
}

/***************************************************************************
 put all valid privileges into a mask
****************************************************************************/

void se_priv_put_all_privileges(uint64_t *privilege_mask)
{
	int i;
	uint32_t num_privs = ARRAY_SIZE(privs);

	*privilege_mask = 0;
	for ( i=0; i<num_privs; i++ ) {
		*privilege_mask |= privs[i].privilege_mask;
	}
}

/*********************************************************************
 Lookup the uint64_t bitmask value for a privilege name
*********************************************************************/

bool se_priv_from_name( const char *name, uint64_t *privilege_mask )
{
	int i;
	uint32_t num_privs = ARRAY_SIZE(privs);
	for ( i=0; i<num_privs; i++ ) {
		if ( strequal( privs[i].name, name ) ) {
			*privilege_mask = privs[i].privilege_mask;
			return true;
		}
	}

	return false;
}

const char* get_privilege_dispname( const char *name )
{
	int i;

	uint32_t num_privs = ARRAY_SIZE(privs);

	if (!name) {
		return NULL;
	}

	for ( i=0; i<num_privs; i++ ) {
		if ( strequal( privs[i].name, name ) ) {
			return privs[i].description;
		}
	}

	return NULL;
}

/*******************************************************************
 return the number of elements in the 'short' privlege array (traditional source3 behaviour)
*******************************************************************/

int num_privileges_in_short_list( void )
{
	return NUM_SHORT_LIST_PRIVS;
}

/****************************************************************************
 add a privilege to a privilege array
 ****************************************************************************/

static bool privilege_set_add(PRIVILEGE_SET *priv_set, struct lsa_LUIDAttribute set)
{
	struct lsa_LUIDAttribute *new_set;

	/* we can allocate memory to add the new privilege */

	new_set = talloc_realloc(priv_set->mem_ctx, priv_set->set, struct lsa_LUIDAttribute, priv_set->count + 1);
	if ( !new_set ) {
		DEBUG(0,("privilege_set_add: failed to allocate memory!\n"));
		return false;
	}

	new_set[priv_set->count].luid.high = set.luid.high;
	new_set[priv_set->count].luid.low = set.luid.low;
	new_set[priv_set->count].attribute = set.attribute;

	priv_set->count++;
	priv_set->set = new_set;

	return true;
}

/*******************************************************************
*******************************************************************/

bool se_priv_to_privilege_set( PRIVILEGE_SET *set, uint64_t privilege_mask )
{
	int i;
	uint32_t num_privs = ARRAY_SIZE(privs);
	struct lsa_LUIDAttribute luid;

	luid.attribute = 0;
	luid.luid.high = 0;

	for ( i=0; i<num_privs; i++ ) {
		if ((privilege_mask & privs[i].privilege_mask) == 0)
			continue;

		luid.luid.high = 0;
		luid.luid.low = privs[i].luid;

		if ( !privilege_set_add( set, luid ) )
			return false;
	}

	return true;
}

/*******************************************************************
*******************************************************************/

bool privilege_set_to_se_priv( uint64_t *privilege_mask, struct lsa_PrivilegeSet *privset )
{
	int i;

	ZERO_STRUCTP( privilege_mask );

	for ( i=0; i<privset->count; i++ ) {
		uint64_t r;

		/* sanity check for invalid privilege.  we really
		   only care about the low 32 bits */

		if ( privset->set[i].luid.high != 0 )
			return false;

		r = sec_privilege_mask(privset->set[i].luid.low);
		if (r) {
			*privilege_mask |= r;
		}
	}

	return true;
}

/*
  map a privilege id to the wire string constant
*/
const char *sec_privilege_name(enum sec_privilege privilege)
{
	int i;
	for (i=0;i<ARRAY_SIZE(privs);i++) {
		if (privs[i].luid == privilege) {
			return privs[i].name;
		}
	}
	return NULL;
}

/*
  map a privilege id to a privilege display name. Return NULL if not found

  TODO: this should use language mappings
*/
const char *sec_privilege_display_name(enum sec_privilege privilege, uint16_t *language)
{
	int i;
	for (i=0;i<ARRAY_SIZE(privs);i++) {
		if (privs[i].luid == privilege) {
			return privs[i].description;
		}
	}
	return NULL;
}

/*
  map a privilege name to a privilege id. Return SEC_PRIV_INVALID if not found
*/
enum sec_privilege sec_privilege_id(const char *name)
{
	int i;
	for (i=0;i<ARRAY_SIZE(privs);i++) {
		if (strcasecmp(privs[i].name, name) == 0) {
			return privs[i].luid;
		}
	}
	return SEC_PRIV_INVALID;
}

/*
  map a 'right' name to it's bitmap value. Return 0 if not found
*/
uint32_t sec_right_bit(const char *name)
{
	int i;
	for (i=0;i<ARRAY_SIZE(rights);i++) {
		if (strcasecmp(rights[i].name, name) == 0) {
			return rights[i].right_mask;
		}
	}
	return 0;
}

/*
  assist in walking the table of privileges - return the LUID (low 32 bits) by index
*/
enum sec_privilege sec_privilege_from_index(int idx)
{
	if (idx >= 0 && idx<ARRAY_SIZE(privs)) {
		return privs[idx].luid;
	}
	return SEC_PRIV_INVALID;
}

/*
  assist in walking the table of privileges - return the string constant by index
*/
const char *sec_privilege_name_from_index(int idx)
{
	if (idx >= 0 && idx<ARRAY_SIZE(privs)) {
		return privs[idx].name;
	}
	return NULL;
}



/*
  return true if a security_token has a particular privilege bit set
*/
bool security_token_has_privilege(const struct security_token *token, enum sec_privilege privilege)
{
	uint64_t mask;

	mask = sec_privilege_mask(privilege);
	if (mask == 0) {
		return false;
	}

	if (token->privilege_mask & mask) {
		return true;
	}
	return false;
}

/*
  set a bit in the privilege mask
*/
void security_token_set_privilege(struct security_token *token, enum sec_privilege privilege)
{
	/* Relies on the fact that an invalid privilage will return 0, so won't change this */
	token->privilege_mask |= sec_privilege_mask(privilege);
}

/*
  set a bit in the rights mask
*/
void security_token_set_right_bit(struct security_token *token, uint32_t right_bit)
{
	token->rights_mask |= right_bit;
}

void security_token_debug_privileges(int dbg_class, int dbg_lev, const struct security_token *token)
{
	DEBUGADDC(dbg_class, dbg_lev, (" Privileges (0x%16llX):\n",
				       (unsigned long long) token->privilege_mask));

	if (token->privilege_mask) {
		int idx = 0;
		int i = 0;
		for (idx = 0; idx<ARRAY_SIZE(privs); idx++) {
			if (token->privilege_mask & privs[idx].privilege_mask) {
				DEBUGADDC(dbg_class, dbg_lev,
					  ("  Privilege[%3lu]: %s\n", (unsigned long)i++,
					   privs[idx].name));
			}
		}
	}
	DEBUGADDC(dbg_class, dbg_lev, (" Rights (0x%16lX):\n",
				       (unsigned long) token->rights_mask));

	if (token->rights_mask) {
		int idx = 0;
		int i = 0;
		for (idx = 0; idx<ARRAY_SIZE(rights); idx++) {
			if (token->rights_mask & rights[idx].right_mask) {
				DEBUGADDC(dbg_class, dbg_lev,
					  ("  Right[%3lu]: %s\n", (unsigned long)i++,
					   rights[idx].name));
			}
		}
	}
}