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d3d8: Hold the DLL lock in IDirect3D8 methods.
[wine.git] / server / token.c
blob8975c54fb3af14363deef7e83bf8a59cd92ef093
1 /*
2 * Tokens
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2003 Mike McCormack
6 * Copyright (C) 2005 Robert Shearman
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #include "config.h"
24
25 #include <assert.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <stdarg.h>
29
30 #include "ntstatus.h"
31 #define WIN32_NO_STATUS
32 #include "windef.h"
33 #include "winternl.h"
34
35 #include "handle.h"
36 #include "thread.h"
37 #include "process.h"
38 #include "request.h"
39 #include "security.h"
40
41 #include "wine/unicode.h"
42
43 #define MAX_SUBAUTH_COUNT 1
44
45 const LUID SeIncreaseQuotaPrivilege = { 5, 0 };
46 const LUID SeSecurityPrivilege = { 8, 0 };
47 const LUID SeTakeOwnershipPrivilege = { 9, 0 };
48 const LUID SeLoadDriverPrivilege = { 10, 0 };
49 const LUID SeSystemProfilePrivilege = { 11, 0 };
50 const LUID SeSystemtimePrivilege = { 12, 0 };
51 const LUID SeProfileSingleProcessPrivilege = { 13, 0 };
52 const LUID SeIncreaseBasePriorityPrivilege = { 14, 0 };
53 const LUID SeCreatePagefilePrivilege = { 15, 0 };
54 const LUID SeBackupPrivilege = { 17, 0 };
55 const LUID SeRestorePrivilege = { 18, 0 };
56 const LUID SeShutdownPrivilege = { 19, 0 };
57 const LUID SeDebugPrivilege = { 20, 0 };
58 const LUID SeSystemEnvironmentPrivilege = { 22, 0 };
59 const LUID SeChangeNotifyPrivilege = { 23, 0 };
60 const LUID SeRemoteShutdownPrivilege = { 24, 0 };
61 const LUID SeUndockPrivilege = { 25, 0 };
62 const LUID SeManageVolumePrivilege = { 28, 0 };
63 const LUID SeImpersonatePrivilege = { 29, 0 };
64 const LUID SeCreateGlobalPrivilege = { 30, 0 };
65
66 static const SID world_sid = { SID_REVISION, 1, { SECURITY_WORLD_SID_AUTHORITY }, { SECURITY_WORLD_RID } };
67 static const SID local_sid = { SID_REVISION, 1, { SECURITY_LOCAL_SID_AUTHORITY }, { SECURITY_LOCAL_RID } };
68 static const SID interactive_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_INTERACTIVE_RID } };
69 static const SID authenticated_user_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_AUTHENTICATED_USER_RID } };
70 static const SID local_system_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_LOCAL_SYSTEM_RID } };
71 static const PSID security_world_sid = (PSID)&world_sid;
72 static const PSID security_local_sid = (PSID)&local_sid;
73 const PSID security_interactive_sid = (PSID)&interactive_sid;
74 static const PSID security_authenticated_user_sid = (PSID)&authenticated_user_sid;
75 static const PSID security_local_system_sid = (PSID)&local_system_sid;
76
77 static luid_t prev_luid_value = { 1000, 0 };
78
79 struct token
80 {
81 struct object obj; /* object header */
82 luid_t token_id; /* system-unique id of token */
83 luid_t modified_id; /* new id allocated every time token is modified */
84 struct list privileges; /* privileges available to the token */
85 struct list groups; /* groups that the user of this token belongs to (sid_and_attributes) */
86 SID *user; /* SID of user this token represents */
87 SID *primary_group; /* SID of user's primary group */
88 unsigned primary; /* is this a primary or impersonation token? */
89 ACL *default_dacl; /* the default DACL to assign to objects created by this user */
90 TOKEN_SOURCE source; /* source of the token */
91 SECURITY_IMPERSONATION_LEVEL impersonation_level; /* impersonation level this token is capable of if non-primary token */
92 };
93
94 struct privilege
95 {
96 struct list entry;
97 LUID luid;
98 unsigned enabled : 1; /* is the privilege currently enabled? */
99 unsigned def : 1; /* is the privilege enabled by default? */
100 };
101
102 struct group
103 {
104 struct list entry;
105 unsigned enabled : 1; /* is the sid currently enabled? */
106 unsigned def : 1; /* is the sid enabled by default? */
107 unsigned logon : 1; /* is this a logon sid? */
108 unsigned mandatory: 1; /* is this sid always enabled? */
109 unsigned owner : 1; /* can this sid be an owner of an object? */
110 unsigned resource : 1; /* is this a domain-local group? */
111 unsigned deny_only: 1; /* is this a sid that should be use for denying only? */
112 SID sid;
113 };
114
115 static void token_dump( struct object *obj, int verbose );
116 static unsigned int token_map_access( struct object *obj, unsigned int access );
117 static void token_destroy( struct object *obj );
118
119 static const struct object_ops token_ops =
120 {
121 sizeof(struct token), /* size */
122 token_dump, /* dump */
123 no_add_queue, /* add_queue */
124 NULL, /* remove_queue */
125 NULL, /* signaled */
126 NULL, /* satisfied */
127 no_signal, /* signal */
128 no_get_fd, /* get_fd */
129 token_map_access, /* map_access */
130 no_lookup_name, /* lookup_name */
131 no_open_file, /* open_file */
132 no_close_handle, /* close_handle */
133 token_destroy /* destroy */
134 };
135
136
137 static void token_dump( struct object *obj, int verbose )
138 {
139 fprintf( stderr, "Security token\n" );
140 /* FIXME: dump token members */
141 }
142
143 static unsigned int token_map_access( struct object *obj, unsigned int access )
144 {
145 if (access & GENERIC_READ) access |= TOKEN_READ;
146 if (access & GENERIC_WRITE) access |= TOKEN_WRITE;
147 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
148 if (access & GENERIC_ALL) access |= TOKEN_ALL_ACCESS;
149 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
150 }
151
152 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
153 {
154 int i;
155 SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
156 if (!sid) return NULL;
157 sid->Revision = SID_REVISION;
158 sid->SubAuthorityCount = subauthcount;
159 sid->IdentifierAuthority = *idauthority;
160 for (i = 0; i < subauthcount; i++)
161 sid->SubAuthority[i] = subauth[i];
162 return sid;
163 }
164
165 static inline int security_equal_sid( const SID *sid1, const SID *sid2 )
166 {
167 return ((sid1->SubAuthorityCount == sid2->SubAuthorityCount) &&
168 !memcmp( sid1, sid2, FIELD_OFFSET(SID, SubAuthority[sid1->SubAuthorityCount]) ));
169 }
170
171 void security_set_thread_token( struct thread *thread, obj_handle_t handle )
172 {
173 if (!handle)
174 {
175 if (thread->token)
176 release_object( thread->token );
177 thread->token = NULL;
178 }
179 else
180 {
181 struct token *token = (struct token *)get_handle_obj( current->process,
182 handle,
183 TOKEN_IMPERSONATE,
184 &token_ops );
185 if (token)
186 {
187 if (thread->token)
188 release_object( thread->token );
189 thread->token = token;
190 }
191 }
192 }
193
194 static const ACE_HEADER *ace_next( const ACE_HEADER *ace )
195 {
196 return (const ACE_HEADER *)((const char *)ace + ace->AceSize);
197 }
198
199 static int acl_is_valid( const ACL *acl, data_size_t size )
200 {
201 ULONG i;
202 const ACE_HEADER *ace;
203
204 if (size < sizeof(ACL))
205 return FALSE;
206
207 size = min(size, MAX_ACL_LEN);
208
209 size -= sizeof(ACL);
210
211 ace = (const ACE_HEADER *)(acl + 1);
212 for (i = 0; i < acl->AceCount; i++)
213 {
214 const SID *sid;
215 data_size_t sid_size;
216
217 if (size < sizeof(ACE_HEADER))
218 return FALSE;
219 if (size < ace->AceSize)
220 return FALSE;
221 size -= ace->AceSize;
222 switch (ace->AceType)
223 {
224 case ACCESS_DENIED_ACE_TYPE:
225 sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
226 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
227 break;
228 case ACCESS_ALLOWED_ACE_TYPE:
229 sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
230 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
231 break;
232 case SYSTEM_AUDIT_ACE_TYPE:
233 sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
234 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
235 break;
236 case SYSTEM_ALARM_ACE_TYPE:
237 sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
238 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
239 break;
240 default:
241 return FALSE;
242 }
243 if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
244 sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
245 return FALSE;
246 ace = ace_next( ace );
247 }
248 return TRUE;
249 }
250
251 /* gets the discretionary access control list from a security descriptor */
252 static inline const ACL *sd_get_dacl( const struct security_descriptor *sd, int *present )
253 {
254 *present = (sd->control & SE_DACL_PRESENT ? TRUE : FALSE);
255
256 if (sd->dacl_len)
257 return (const ACL *)((const char *)(sd + 1) +
258 sd->owner_len + sd->group_len + sd->sacl_len);
259 else
260 return NULL;
261 }
262
263 /* gets the system access control list from a security descriptor */
264 static inline const ACL *sd_get_sacl( const struct security_descriptor *sd, int *present )
265 {
266 *present = (sd->control & SE_SACL_PRESENT ? TRUE : FALSE);
267
268 if (sd->sacl_len)
269 return (const ACL *)((const char *)(sd + 1) +
270 sd->owner_len + sd->group_len);
271 else
272 return NULL;
273 }
274
275 /* gets the owner from a security descriptor */
276 static inline const SID *sd_get_owner( const struct security_descriptor *sd )
277 {
278 if (sd->owner_len)
279 return (const SID *)(sd + 1);
280 else
281 return NULL;
282 }
283
284 /* gets the primary group from a security descriptor */
285 static inline const SID *sd_get_group( const struct security_descriptor *sd )
286 {
287 if (sd->group_len)
288 return (const SID *)((const char *)(sd + 1) + sd->owner_len);
289 else
290 return NULL;
291 }
292
293 /* checks whether all members of a security descriptor fit inside the size
294 * of memory specified */
295 static int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
296 {
297 size_t offset = sizeof(struct security_descriptor);
298 const SID *group;
299 const SID *owner;
300 const ACL *sacl;
301 const ACL *dacl;
302 int dummy;
303
304 if (size < offset)
305 return FALSE;
306
307 if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
308 (offset + sd->owner_len > size))
309 return FALSE;
310 owner = sd_get_owner( sd );
311 if (owner)
312 {
313 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
314 if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
315 return FALSE;
316 }
317 offset += sd->owner_len;
318
319 if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
320 (offset + sd->group_len > size))
321 return FALSE;
322 group = sd_get_group( sd );
323 if (group)
324 {
325 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
326 if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
327 return FALSE;
328 }
329 offset += sd->group_len;
330
331 if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
332 return FALSE;
333 sacl = sd_get_sacl( sd, &dummy );
334 if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
335 return FALSE;
336 offset += sd->sacl_len;
337
338 if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
339 return FALSE;
340 dacl = sd_get_dacl( sd, &dummy );
341 if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
342 return FALSE;
343 offset += sd->dacl_len;
344
345 return TRUE;
346 }
347
348 /* maps from generic rights to specific rights as given by a mapping */
349 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
350 {
351 if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
352 if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
353 if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
354 if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
355 *mask &= 0x0FFFFFFF;
356 }
357
358 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
359 {
360 return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
361 }
362
363 static inline void allocate_luid( luid_t *luid )
364 {
365 prev_luid_value.low_part++;
366 *luid = prev_luid_value;
367 }
368
369 DECL_HANDLER( allocate_locally_unique_id )
370 {
371 allocate_luid( &reply->luid );
372 }
373
374 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
375 {
376 out->Luid = in->luid;
377 out->Attributes =
378 (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
379 (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
380 }
381
382 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
383 {
384 struct privilege *privilege = mem_alloc( sizeof(*privilege) );
385 if (privilege)
386 {
387 privilege->luid = *luid;
388 privilege->def = privilege->enabled = (enabled != 0);
389 list_add_tail( &token->privileges, &privilege->entry );
390 }
391 return privilege;
392 }
393
394 static inline void privilege_remove( struct privilege *privilege )
395 {
396 list_remove( &privilege->entry );
397 free( privilege );
398 }
399
400 static void token_destroy( struct object *obj )
401 {
402 struct token* token;
403 struct list *cursor, *cursor_next;
404
405 assert( obj->ops == &token_ops );
406 token = (struct token *)obj;
407
408 free( token->user );
409
410 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
411 {
412 struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
413 privilege_remove( privilege );
414 }
415
416 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
417 {
418 struct group *group = LIST_ENTRY( cursor, struct group, entry );
419 list_remove( &group->entry );
420 free( group );
421 }
422
423 free( token->default_dacl );
424 }
425
426 /* creates a new token.
427 * groups may be NULL if group_count is 0.
428 * privs may be NULL if priv_count is 0.
429 * default_dacl may be NULL, indicating that all objects created by the user
430 * are unsecured.
431 * modified_id may be NULL, indicating that a new modified_id luid should be
432 * allocated.
433 */
434 static struct token *create_token( unsigned primary, const SID *user,
435 const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
436 const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
437 const ACL *default_dacl, TOKEN_SOURCE source,
438 const luid_t *modified_id,
439 SECURITY_IMPERSONATION_LEVEL impersonation_level )
440 {
441 struct token *token = alloc_object( &token_ops );
442 if (token)
443 {
444 unsigned int i;
445
446 allocate_luid( &token->token_id );
447 if (modified_id)
448 token->modified_id = *modified_id;
449 else
450 allocate_luid( &token->modified_id );
451 list_init( &token->privileges );
452 list_init( &token->groups );
453 token->primary = primary;
454 /* primary tokens don't have impersonation levels */
455 if (primary)
456 token->impersonation_level = -1;
457 else
458 token->impersonation_level = impersonation_level;
459 token->default_dacl = NULL;
460 token->primary_group = NULL;
461
462 /* copy user */
463 token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
464 if (!token->user)
465 {
466 release_object( token );
467 return NULL;
468 }
469
470 /* copy groups */
471 for (i = 0; i < group_count; i++)
472 {
473 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
474 struct group *group = mem_alloc( size );
475
476 if (!group)
477 {
478 release_object( token );
479 return NULL;
480 }
481 memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
482 group->enabled = TRUE;
483 group->def = TRUE;
484 group->logon = FALSE;
485 group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
486 group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
487 group->resource = FALSE;
488 group->deny_only = FALSE;
489 list_add_tail( &token->groups, &group->entry );
490 /* Use first owner capable group as an owner */
491 if (!token->primary_group && group->owner)
492 token->primary_group = &group->sid;
493 }
494
495 /* copy privileges */
496 for (i = 0; i < priv_count; i++)
497 {
498 /* note: we don't check uniqueness: the caller must make sure
499 * privs doesn't contain any duplicate luids */
500 if (!privilege_add( token, &privs[i].Luid,
501 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
502 {
503 release_object( token );
504 return NULL;
505 }
506 }
507
508 if (default_dacl)
509 {
510 token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
511 if (!token->default_dacl)
512 {
513 release_object( token );
514 return NULL;
515 }
516 }
517
518 token->source = source;
519 }
520 return token;
521 }
522
523 struct token *token_duplicate( struct token *src_token, unsigned primary,
524 SECURITY_IMPERSONATION_LEVEL impersonation_level )
525 {
526 const luid_t *modified_id =
527 primary || (impersonation_level == src_token->impersonation_level) ?
528 &src_token->modified_id : NULL;
529 struct token *token = NULL;
530 struct privilege *privilege;
531 struct group *group;
532
533 if ((impersonation_level < SecurityAnonymous) ||
534 (impersonation_level > SecurityDelegation))
535 {
536 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
537 return NULL;
538 }
539
540 if (primary || (impersonation_level <= src_token->impersonation_level))
541 token = create_token( primary, src_token->user, NULL, 0,
542 NULL, 0, src_token->default_dacl,
543 src_token->source, modified_id,
544 impersonation_level );
545 else set_error( STATUS_BAD_IMPERSONATION_LEVEL );
546
547 if (!token) return token;
548
549 /* copy groups */
550 LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
551 {
552 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
553 struct group *newgroup = mem_alloc( size );
554 if (!newgroup)
555 {
556 release_object( token );
557 return NULL;
558 }
559 memcpy( newgroup, group, size );
560 list_add_tail( &token->groups, &newgroup->entry );
561 }
562 token->primary_group = src_token->primary_group;
563 assert( token->primary_group );
564
565 /* copy privileges */
566 LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
567 if (!privilege_add( token, &privilege->luid, privilege->enabled ))
568 {
569 release_object( token );
570 return NULL;
571 }
572
573 return token;
574 }
575
576 static ACL *create_default_dacl( const SID *user )
577 {
578 ACCESS_ALLOWED_ACE *aaa;
579 ACL *default_dacl;
580 SID *sid;
581 size_t default_dacl_size = sizeof(ACL) +
582 2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
583 sizeof(local_system_sid) +
584 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
585
586 default_dacl = mem_alloc( default_dacl_size );
587 if (!default_dacl) return NULL;
588
589 default_dacl->AclRevision = MAX_ACL_REVISION;
590 default_dacl->Sbz1 = 0;
591 default_dacl->AclSize = default_dacl_size;
592 default_dacl->AceCount = 2;
593 default_dacl->Sbz2 = 0;
594
595 /* GENERIC_ALL for Local System */
596 aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
597 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
598 aaa->Header.AceFlags = 0;
599 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
600 sizeof(local_system_sid);
601 aaa->Mask = GENERIC_ALL;
602 sid = (SID *)&aaa->SidStart;
603 memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
604
605 /* GENERIC_ALL for specified user */
606 aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
607 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
608 aaa->Header.AceFlags = 0;
609 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
610 FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
611 aaa->Mask = GENERIC_ALL;
612 sid = (SID *)&aaa->SidStart;
613 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
614
615 return default_dacl;
616 }
617
618 struct sid_data
619 {
620 SID_IDENTIFIER_AUTHORITY idauth;
621 int count;
622 unsigned int subauth[MAX_SUBAUTH_COUNT];
623 };
624
625 struct token *token_create_admin( void )
626 {
627 struct token *token = NULL;
628 static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
629 static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
630 static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
631 /* on Windows, this value changes every time the user logs on */
632 static const unsigned int logon_subauth[] = { SECURITY_LOGON_IDS_RID, 0, 1 /* FIXME: should be randomly generated when tokens are inherited by new processes */ };
633 PSID alias_admins_sid;
634 PSID alias_users_sid;
635 PSID logon_sid;
636 /* note: should be the owner specified in the token */
637 ACL *default_dacl = create_default_dacl( &interactive_sid );
638
639 alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
640 alias_admins_subauth );
641 alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
642 alias_users_subauth );
643 logon_sid = security_sid_alloc( &nt_authority, sizeof(logon_subauth)/sizeof(logon_subauth[0]),
644 logon_subauth );
645
646 if (alias_admins_sid && alias_users_sid && logon_sid && default_dacl)
647 {
648 const LUID_AND_ATTRIBUTES admin_privs[] =
649 {
650 { SeChangeNotifyPrivilege , SE_PRIVILEGE_ENABLED },
651 { SeSecurityPrivilege , 0 },
652 { SeBackupPrivilege , 0 },
653 { SeRestorePrivilege , 0 },
654 { SeSystemtimePrivilege , 0 },
655 { SeShutdownPrivilege , 0 },
656 { SeRemoteShutdownPrivilege , 0 },
657 { SeTakeOwnershipPrivilege , 0 },
658 { SeDebugPrivilege , 0 },
659 { SeSystemEnvironmentPrivilege , 0 },
660 { SeSystemProfilePrivilege , 0 },
661 { SeProfileSingleProcessPrivilege, 0 },
662 { SeIncreaseBasePriorityPrivilege, 0 },
663 { SeLoadDriverPrivilege , 0 },
664 { SeCreatePagefilePrivilege , 0 },
665 { SeIncreaseQuotaPrivilege , 0 },
666 { SeUndockPrivilege , 0 },
667 { SeManageVolumePrivilege , 0 },
668 { SeImpersonatePrivilege , SE_PRIVILEGE_ENABLED },
669 { SeCreateGlobalPrivilege , SE_PRIVILEGE_ENABLED },
670 };
671 /* note: we don't include non-builtin groups here for the user -
672 * telling us these is the job of a client-side program */
673 const SID_AND_ATTRIBUTES admin_groups[] =
674 {
675 { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
676 { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
677 { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
678 { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
679 { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
680 { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
681 { logon_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_LOGON_ID },
682 };
683 static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
684 /* note: we just set the user sid to be the interactive builtin sid -
685 * we should really translate the UNIX user id to a sid */
686 token = create_token( TRUE, &interactive_sid,
687 admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
688 admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
689 default_dacl, admin_source, NULL, -1 );
690 /* we really need a primary group */
691 assert( token->primary_group );
692 }
693
694 free( logon_sid );
695 free( alias_admins_sid );
696 free( alias_users_sid );
697 free( default_dacl );
698
699 return token;
700 }
701
702 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
703 {
704 struct privilege *privilege;
705 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
706 {
707 if (is_equal_luid( luid, &privilege->luid ))
708 {
709 if (enabled_only && !privilege->enabled)
710 return NULL;
711 return privilege;
712 }
713 }
714 return NULL;
715 }
716
717 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
718 unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
719 unsigned int mod_privs_count )
720 {
721 unsigned int i, modified_count = 0;
722
723 /* mark as modified */
724 allocate_luid( &token->modified_id );
725
726 for (i = 0; i < count; i++)
727 {
728 struct privilege *privilege =
729 token_find_privilege( token, &privs[i].Luid, FALSE );
730 if (!privilege)
731 {
732 set_error( STATUS_NOT_ALL_ASSIGNED );
733 continue;
734 }
735
736 if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
737 privilege_remove( privilege );
738 else
739 {
740 /* save previous state for caller */
741 if (mod_privs_count)
742 {
743 luid_and_attr_from_privilege(mod_privs, privilege);
744 mod_privs++;
745 mod_privs_count--;
746 modified_count++;
747 }
748
749 if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
750 privilege->enabled = TRUE;
751 else
752 privilege->enabled = FALSE;
753 }
754 }
755 return modified_count;
756 }
757
758 static void token_disable_privileges( struct token *token )
759 {
760 struct privilege *privilege;
761
762 /* mark as modified */
763 allocate_luid( &token->modified_id );
764
765 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
766 privilege->enabled = FALSE;
767 }
768
769 int token_check_privileges( struct token *token, int all_required,
770 const LUID_AND_ATTRIBUTES *reqprivs,
771 unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
772 {
773 unsigned int i, enabled_count = 0;
774
775 for (i = 0; i < count; i++)
776 {
777 struct privilege *privilege =
778 token_find_privilege( token, &reqprivs[i].Luid, TRUE );
779
780 if (usedprivs)
781 usedprivs[i] = reqprivs[i];
782
783 if (privilege && privilege->enabled)
784 {
785 enabled_count++;
786 if (usedprivs)
787 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
788 }
789 }
790
791 if (all_required)
792 return (enabled_count == count);
793 else
794 return (enabled_count > 0);
795 }
796
797 static int token_sid_present( struct token *token, const SID *sid, int deny )
798 {
799 struct group *group;
800
801 if (security_equal_sid( token->user, sid )) return TRUE;
802
803 LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
804 {
805 if (!group->enabled) continue;
806 if (group->deny_only && !deny) continue;
807
808 if (security_equal_sid( &group->sid, sid )) return TRUE;
809 }
810
811 return FALSE;
812 }
813
814 /* Checks access to a security descriptor. 'sd' must have been validated by
815 * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
816 * the reason. 'status' parameter will indicate if access is granted or denied.
817 *
818 * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
819 */
820 static unsigned int token_access_check( struct token *token,
821 const struct security_descriptor *sd,
822 unsigned int desired_access,
823 LUID_AND_ATTRIBUTES *privs,
824 unsigned int *priv_count,
825 const GENERIC_MAPPING *mapping,
826 unsigned int *granted_access,
827 unsigned int *status )
828 {
829 unsigned int current_access = 0;
830 unsigned int denied_access = 0;
831 ULONG i;
832 const ACL *dacl;
833 int dacl_present;
834 const ACE_HEADER *ace;
835 const SID *owner;
836
837 /* assume no access rights */
838 *granted_access = 0;
839
840 /* fail if desired_access contains generic rights */
841 if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
842 {
843 *priv_count = 0;
844 return STATUS_GENERIC_NOT_MAPPED;
845 }
846
847 dacl = sd_get_dacl( sd, &dacl_present );
848 owner = sd_get_owner( sd );
849 if (!owner || !sd_get_group( sd ))
850 {
851 *priv_count = 0;
852 return STATUS_INVALID_SECURITY_DESCR;
853 }
854
855 /* 1: Grant desired access if the object is unprotected */
856 if (!dacl_present)
857 {
858 *priv_count = 0;
859 *granted_access = desired_access;
860 return *status = STATUS_SUCCESS;
861 }
862 if (!dacl)
863 {
864 *priv_count = 0;
865 *status = STATUS_ACCESS_DENIED;
866 return STATUS_SUCCESS;
867 }
868
869 /* 2: Check if caller wants access to system security part. Note: access
870 * is only granted if specifically asked for */
871 if (desired_access & ACCESS_SYSTEM_SECURITY)
872 {
873 const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
874 LUID_AND_ATTRIBUTES retpriv = security_priv;
875 if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
876 {
877 if (priv_count)
878 {
879 /* assumes that there will only be one privilege to return */
880 if (*priv_count >= 1)
881 {
882 *priv_count = 1;
883 *privs = retpriv;
884 }
885 else
886 {
887 *priv_count = 1;
888 return STATUS_BUFFER_TOO_SMALL;
889 }
890 }
891 current_access |= ACCESS_SYSTEM_SECURITY;
892 if (desired_access == current_access)
893 {
894 *granted_access = current_access;
895 return *status = STATUS_SUCCESS;
896 }
897 }
898 else
899 {
900 *priv_count = 0;
901 *status = STATUS_PRIVILEGE_NOT_HELD;
902 return STATUS_SUCCESS;
903 }
904 }
905 else if (priv_count) *priv_count = 0;
906
907 /* 3: Check whether the token is the owner */
908 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
909 * checked when a "set owner" call is made, overriding the access rights
910 * determined here. */
911 if (token_sid_present( token, owner, FALSE ))
912 {
913 current_access |= (READ_CONTROL | WRITE_DAC);
914 if (desired_access == current_access)
915 {
916 *granted_access = current_access;
917 return *status = STATUS_SUCCESS;
918 }
919 }
920
921 /* 4: Grant rights according to the DACL */
922 ace = (const ACE_HEADER *)(dacl + 1);
923 for (i = 0; i < dacl->AceCount; i++)
924 {
925 const ACCESS_ALLOWED_ACE *aa_ace;
926 const ACCESS_DENIED_ACE *ad_ace;
927 const SID *sid;
928 switch (ace->AceType)
929 {
930 case ACCESS_DENIED_ACE_TYPE:
931 ad_ace = (const ACCESS_DENIED_ACE *)ace;
932 sid = (const SID *)&ad_ace->SidStart;
933 if (token_sid_present( token, sid, TRUE ))
934 {
935 unsigned int access = ad_ace->Mask;
936 map_generic_mask(&access, mapping);
937 if (desired_access & MAXIMUM_ALLOWED)
938 denied_access |= access;
939 else
940 {
941 denied_access |= (access & ~current_access);
942 if (desired_access & access) goto done;
943 }
944 }
945 break;
946 case ACCESS_ALLOWED_ACE_TYPE:
947 aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
948 sid = (const SID *)&aa_ace->SidStart;
949 if (token_sid_present( token, sid, FALSE ))
950 {
951 unsigned int access = aa_ace->Mask;
952 map_generic_mask(&access, mapping);
953 if (desired_access & MAXIMUM_ALLOWED)
954 current_access |= access;
955 else
956 current_access |= (access & ~denied_access);
957 }
958 break;
959 }
960
961 /* don't bother carrying on checking if we've already got all of
962 * rights we need */
963 if (desired_access == *granted_access)
964 break;
965
966 ace = ace_next( ace );
967 }
968
969 done:
970 if (desired_access & MAXIMUM_ALLOWED)
971 *granted_access = current_access & ~denied_access;
972 else
973 if ((current_access & desired_access) == desired_access)
974 *granted_access = current_access & desired_access;
975 else
976 *granted_access = 0;
977
978 *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
979 return STATUS_SUCCESS;
980 }
981
982 const ACL *token_get_default_dacl( struct token *token )
983 {
984 return token->default_dacl;
985 }
986
987 static void set_object_sd( struct object *obj, const struct security_descriptor *sd,
988 unsigned int set_info )
989 {
990 struct security_descriptor new_sd, *pnew_sd;
991 int present;
992 const SID *owner, *group;
993 const ACL *sacl, *dacl;
994 char *ptr;
995
996 if (!set_info) return;
997
998 new_sd.control = sd->control & ~SE_SELF_RELATIVE;
999
1000 owner = sd_get_owner( sd );
1001 if (set_info & OWNER_SECURITY_INFORMATION && owner)
1002 new_sd.owner_len = sd->owner_len;
1003 else
1004 {
1005 owner = current->process->token->user;
1006 new_sd.owner_len = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
1007 new_sd.control |= SE_OWNER_DEFAULTED;
1008 }
1009
1010 group = sd_get_group( sd );
1011 if (set_info & GROUP_SECURITY_INFORMATION && group)
1012 new_sd.group_len = sd->group_len;
1013 else
1014 {
1015 group = current->process->token->primary_group;
1016 new_sd.group_len = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
1017 new_sd.control |= SE_GROUP_DEFAULTED;
1018 }
1019
1020 new_sd.control |= SE_SACL_PRESENT;
1021 sacl = sd_get_sacl( sd, &present );
1022 if (set_info & SACL_SECURITY_INFORMATION && present)
1023 new_sd.sacl_len = sd->sacl_len;
1024 else
1025 {
1026 if (obj->sd) sacl = sd_get_sacl( obj->sd, &present );
1027
1028 if (obj->sd && present)
1029 new_sd.sacl_len = obj->sd->sacl_len;
1030 else
1031 {
1032 new_sd.sacl_len = 0;
1033 new_sd.control |= SE_SACL_DEFAULTED;
1034 }
1035 }
1036
1037 new_sd.control |= SE_DACL_PRESENT;
1038 dacl = sd_get_dacl( sd, &present );
1039 if (set_info & DACL_SECURITY_INFORMATION && present)
1040 new_sd.dacl_len = sd->dacl_len;
1041 else
1042 {
1043 if (obj->sd) dacl = sd_get_dacl( obj->sd, &present );
1044
1045 if (obj->sd && present)
1046 new_sd.dacl_len = obj->sd->dacl_len;
1047 else
1048 {
1049 dacl = token_get_default_dacl( current->process->token );
1050 new_sd.dacl_len = dacl->AclSize;
1051 new_sd.control |= SE_DACL_DEFAULTED;
1052 }
1053 }
1054
1055 ptr = mem_alloc( sizeof(new_sd) + new_sd.owner_len + new_sd.group_len +
1056 new_sd.sacl_len + new_sd.dacl_len );
1057 if (!ptr) return;
1058 pnew_sd = (struct security_descriptor*)ptr;
1059
1060 memcpy( ptr, &new_sd, sizeof(new_sd) );
1061 ptr += sizeof(new_sd);
1062 memcpy( ptr, owner, new_sd.owner_len );
1063 ptr += new_sd.owner_len;
1064 memcpy( ptr, group, new_sd.group_len );
1065 ptr += new_sd.group_len;
1066 memcpy( ptr, sacl, new_sd.sacl_len );
1067 ptr += new_sd.sacl_len;
1068 memcpy( ptr, dacl, new_sd.dacl_len );
1069
1070 free( obj->sd );
1071 obj->sd = pnew_sd;
1072 }
1073
1074 int check_object_access(struct object *obj, unsigned int *access)
1075 {
1076 GENERIC_MAPPING mapping;
1077 struct token *token = current->token ? current->token : current->process->token;
1078 LUID_AND_ATTRIBUTES priv;
1079 unsigned int status, priv_count = 1;
1080 int res;
1081
1082 mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );
1083
1084 if (!obj->sd)
1085 {
1086 if (*access & MAXIMUM_ALLOWED)
1087 *access = mapping.GenericAll;
1088 return TRUE;
1089 }
1090
1091 mapping.GenericRead = obj->ops->map_access( obj, GENERIC_READ );
1092 mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
1093 mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );
1094
1095 res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
1096 &mapping, access, &status ) == STATUS_SUCCESS &&
1097 status == STATUS_SUCCESS;
1098
1099 if (!res) set_error( STATUS_ACCESS_DENIED );
1100 return res;
1101 }
1102
1103
1104 /* open a security token */
1105 DECL_HANDLER(open_token)
1106 {
1107 if (req->flags & OPEN_TOKEN_THREAD)
1108 {
1109 struct thread *thread = get_thread_from_handle( req->handle, 0 );
1110 if (thread)
1111 {
1112 if (thread->token)
1113 {
1114 if (thread->token->impersonation_level <= SecurityAnonymous)
1115 set_error( STATUS_CANT_OPEN_ANONYMOUS );
1116 else
1117 reply->token = alloc_handle( current->process, thread->token,
1118 req->access, req->attributes );
1119 }
1120 else
1121 set_error( STATUS_NO_TOKEN );
1122 release_object( thread );
1123 }
1124 }
1125 else
1126 {
1127 struct process *process = get_process_from_handle( req->handle, 0 );
1128 if (process)
1129 {
1130 if (process->token)
1131 reply->token = alloc_handle( current->process, process->token, req->access,
1132 req->attributes );
1133 else
1134 set_error( STATUS_NO_TOKEN );
1135 release_object( process );
1136 }
1137 }
1138 }
1139
1140 /* adjust the privileges held by a token */
1141 DECL_HANDLER(adjust_token_privileges)
1142 {
1143 struct token *token;
1144 unsigned int access = TOKEN_ADJUST_PRIVILEGES;
1145
1146 if (req->get_modified_state) access |= TOKEN_QUERY;
1147
1148 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1149 access, &token_ops )))
1150 {
1151 const LUID_AND_ATTRIBUTES *privs = get_req_data();
1152 LUID_AND_ATTRIBUTES *modified_privs = NULL;
1153 unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1154 unsigned int modified_priv_count = 0;
1155
1156 if (req->get_modified_state && !req->disable_all)
1157 {
1158 unsigned int i;
1159 /* count modified privs */
1160 for (i = 0; i < priv_count; i++)
1161 {
1162 struct privilege *privilege =
1163 token_find_privilege( token, &privs[i].Luid, FALSE );
1164 if (privilege && req->get_modified_state)
1165 modified_priv_count++;
1166 }
1167 reply->len = modified_priv_count;
1168 modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
1169 if (modified_priv_count)
1170 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
1171 }
1172 reply->len = modified_priv_count * sizeof(*modified_privs);
1173
1174 if (req->disable_all)
1175 token_disable_privileges( token );
1176 else
1177 modified_priv_count = token_adjust_privileges( token, privs,
1178 priv_count, modified_privs, modified_priv_count );
1179
1180 release_object( token );
1181 }
1182 }
1183
1184 /* retrieves the list of privileges that may be held be the token */
1185 DECL_HANDLER(get_token_privileges)
1186 {
1187 struct token *token;
1188
1189 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1190 TOKEN_QUERY,
1191 &token_ops )))
1192 {
1193 int priv_count = 0;
1194 LUID_AND_ATTRIBUTES *privs;
1195 struct privilege *privilege;
1196
1197 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1198 priv_count++;
1199
1200 reply->len = priv_count * sizeof(*privs);
1201 if (reply->len <= get_reply_max_size())
1202 {
1203 privs = set_reply_data_size( priv_count * sizeof(*privs) );
1204 if (privs)
1205 {
1206 int i = 0;
1207 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1208 {
1209 luid_and_attr_from_privilege( &privs[i], privilege );
1210 i++;
1211 }
1212 }
1213 }
1214 else
1215 set_error(STATUS_BUFFER_TOO_SMALL);
1216
1217 release_object( token );
1218 }
1219 }
1220
1221 /* creates a duplicate of the token */
1222 DECL_HANDLER(duplicate_token)
1223 {
1224 struct token *src_token;
1225
1226 if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
1227 TOKEN_DUPLICATE,
1228 &token_ops )))
1229 {
1230 struct token *token = token_duplicate( src_token, req->primary, req->impersonation_level );
1231 if (token)
1232 {
1233 reply->new_handle = alloc_handle( current->process, token, req->access, req->attributes);
1234 release_object( token );
1235 }
1236 release_object( src_token );
1237 }
1238 }
1239
1240 /* checks the specified privileges are held by the token */
1241 DECL_HANDLER(check_token_privileges)
1242 {
1243 struct token *token;
1244
1245 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1246 TOKEN_QUERY,
1247 &token_ops )))
1248 {
1249 unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1250
1251 if (!token->primary && token->impersonation_level <= SecurityAnonymous)
1252 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1253 else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1254 {
1255 LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1256 reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1257 }
1258 else
1259 set_error( STATUS_BUFFER_OVERFLOW );
1260 release_object( token );
1261 }
1262 }
1263
1264 /* checks that a user represented by a token is allowed to access an object
1265 * represented by a security descriptor */
1266 DECL_HANDLER(access_check)
1267 {
1268 data_size_t sd_size = get_req_data_size();
1269 const struct security_descriptor *sd = get_req_data();
1270 struct token *token;
1271
1272 if (!sd_is_valid( sd, sd_size ))
1273 {
1274 set_error( STATUS_ACCESS_VIOLATION );
1275 return;
1276 }
1277
1278 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1279 TOKEN_QUERY,
1280 &token_ops )))
1281 {
1282 GENERIC_MAPPING mapping;
1283 unsigned int status;
1284 LUID_AND_ATTRIBUTES priv;
1285 unsigned int priv_count = 1;
1286
1287 memset(&priv, 0, sizeof(priv));
1288
1289 /* only impersonation tokens may be used with this function */
1290 if (token->primary)
1291 {
1292 set_error( STATUS_NO_IMPERSONATION_TOKEN );
1293 release_object( token );
1294 return;
1295 }
1296 /* anonymous impersonation tokens can't be used */
1297 if (token->impersonation_level <= SecurityAnonymous)
1298 {
1299 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1300 release_object( token );
1301 return;
1302 }
1303
1304 mapping.GenericRead = req->mapping_read;
1305 mapping.GenericWrite = req->mapping_write;
1306 mapping.GenericExecute = req->mapping_execute;
1307 mapping.GenericAll = req->mapping_all;
1308
1309 status = token_access_check(
1310 token, sd, req->desired_access, &priv, &priv_count, &mapping,
1311 &reply->access_granted, &reply->access_status );
1312
1313 reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1314
1315 if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1316 {
1317 LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1318 memcpy( privs, &priv, sizeof(priv) );
1319 }
1320
1321 set_error( status );
1322 release_object( token );
1323 }
1324 }
1325
1326 /* retrieves the SID of the user that the token represents */
1327 DECL_HANDLER(get_token_user)
1328 {
1329 struct token *token;
1330
1331 reply->user_len = 0;
1332
1333 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1334 TOKEN_QUERY,
1335 &token_ops )))
1336 {
1337 const SID *user = token->user;
1338
1339 reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
1340 if (reply->user_len <= get_reply_max_size())
1341 {
1342 SID *user_reply = set_reply_data_size( reply->user_len );
1343 if (user_reply)
1344 memcpy( user_reply, user, reply->user_len );
1345 }
1346 else set_error( STATUS_BUFFER_TOO_SMALL );
1347
1348 release_object( token );
1349 }
1350 }
1351
1352 /* retrieves the groups that the user represented by the token belongs to */
1353 DECL_HANDLER(get_token_groups)
1354 {
1355 struct token *token;
1356
1357 reply->user_len = 0;
1358
1359 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1360 TOKEN_QUERY,
1361 &token_ops )))
1362 {
1363 size_t size_needed = sizeof(struct token_groups);
1364 unsigned int group_count = 0;
1365 const struct group *group;
1366
1367 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1368 {
1369 group_count++;
1370 size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
1371 }
1372 size_needed += sizeof(unsigned int) * group_count;
1373
1374 reply->user_len = size_needed;
1375
1376 if (size_needed <= get_reply_max_size())
1377 {
1378 struct token_groups *tg = set_reply_data_size( size_needed );
1379 if (tg)
1380 {
1381 unsigned int *attr_ptr = (unsigned int *)(tg + 1);
1382 SID *sid_ptr = (SID *)(attr_ptr + group_count);
1383
1384 tg->count = group_count;
1385
1386 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1387 {
1388
1389 *attr_ptr = 0;
1390 if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
1391 if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
1392 if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
1393 if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
1394 if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
1395 if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;
1396
1397 memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1398
1399 sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1400 attr_ptr++;
1401 }
1402 }
1403 }
1404 else set_error( STATUS_BUFFER_TOO_SMALL );
1405
1406 release_object( token );
1407 }
1408 }
1409
1410 DECL_HANDLER(get_token_impersonation_level)
1411 {
1412 struct token *token;
1413
1414 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1415 TOKEN_QUERY,
1416 &token_ops )))
1417 {
1418 if (token->primary)
1419 set_error( STATUS_INVALID_PARAMETER );
1420 else
1421 reply->impersonation_level = token->impersonation_level;
1422
1423 release_object( token );
1424 }
1425 }
1426
1427 DECL_HANDLER(set_security_object)
1428 {
1429 data_size_t sd_size = get_req_data_size();
1430 const struct security_descriptor *sd = get_req_data();
1431 struct object *obj;
1432 unsigned int access = 0;
1433
1434 if (!sd_is_valid( sd, sd_size ))
1435 {
1436 set_error( STATUS_ACCESS_VIOLATION );
1437 return;
1438 }
1439
1440 if (req->security_info & OWNER_SECURITY_INFORMATION ||
1441 req->security_info & GROUP_SECURITY_INFORMATION)
1442 access |= WRITE_OWNER;
1443 if (req->security_info & SACL_SECURITY_INFORMATION)
1444 access |= ACCESS_SYSTEM_SECURITY;
1445 if (req->security_info & DACL_SECURITY_INFORMATION)
1446 access |= WRITE_DAC;
1447
1448 if (!(obj = get_handle_obj( current->process, req->handle, access, NULL ))) return;
1449
1450 set_object_sd( obj, sd, req->security_info );
1451 release_object( obj );
1452 }
Windows API implementation