4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2003 Mike McCormack
6 * Copyright (C) 2005 Robert Shearman
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.
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.
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
32 #define WIN32_NO_STATUS
42 #include "wine/unicode.h"
44 #define MAX_SUBAUTH_COUNT 1
46 const LUID SeIncreaseQuotaPrivilege = { 5, 0 };
47 const LUID SeSecurityPrivilege = { 8, 0 };
48 const LUID SeTakeOwnershipPrivilege = { 9, 0 };
49 const LUID SeLoadDriverPrivilege = { 10, 0 };
50 const LUID SeSystemProfilePrivilege = { 11, 0 };
51 const LUID SeSystemtimePrivilege = { 12, 0 };
52 const LUID SeProfileSingleProcessPrivilege = { 13, 0 };
53 const LUID SeIncreaseBasePriorityPrivilege = { 14, 0 };
54 const LUID SeCreatePagefilePrivilege = { 15, 0 };
55 const LUID SeBackupPrivilege = { 17, 0 };
56 const LUID SeRestorePrivilege = { 18, 0 };
57 const LUID SeShutdownPrivilege = { 19, 0 };
58 const LUID SeDebugPrivilege = { 20, 0 };
59 const LUID SeSystemEnvironmentPrivilege = { 22, 0 };
60 const LUID SeChangeNotifyPrivilege = { 23, 0 };
61 const LUID SeRemoteShutdownPrivilege = { 24, 0 };
62 const LUID SeUndockPrivilege = { 25, 0 };
63 const LUID SeManageVolumePrivilege = { 28, 0 };
64 const LUID SeImpersonatePrivilege = { 29, 0 };
65 const LUID SeCreateGlobalPrivilege = { 30, 0 };
67 static const SID world_sid = { SID_REVISION, 1, { SECURITY_WORLD_SID_AUTHORITY }, { SECURITY_WORLD_RID } };
68 static const SID local_sid = { SID_REVISION, 1, { SECURITY_LOCAL_SID_AUTHORITY }, { SECURITY_LOCAL_RID } };
69 static const SID interactive_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_INTERACTIVE_RID } };
70 static const SID anonymous_logon_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_ANONYMOUS_LOGON_RID } };
71 static const SID authenticated_user_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_AUTHENTICATED_USER_RID } };
72 static const SID local_system_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_LOCAL_SYSTEM_RID } };
73 const PSID security_world_sid = (PSID)&world_sid;
74 static const PSID security_local_sid = (PSID)&local_sid;
75 const PSID security_interactive_sid = (PSID)&interactive_sid;
76 static const PSID security_authenticated_user_sid = (PSID)&authenticated_user_sid;
77 const PSID security_local_system_sid = (PSID)&local_system_sid;
79 static luid_t prev_luid_value = { 1000, 0 };
83 struct object obj; /* object header */
84 luid_t token_id; /* system-unique id of token */
85 luid_t modified_id; /* new id allocated every time token is modified */
86 struct list privileges; /* privileges available to the token */
87 struct list groups; /* groups that the user of this token belongs to (sid_and_attributes) */
88 SID *user; /* SID of user this token represents */
89 SID *primary_group; /* SID of user's primary group */
90 unsigned primary; /* is this a primary or impersonation token? */
91 ACL *default_dacl; /* the default DACL to assign to objects created by this user */
92 TOKEN_SOURCE source; /* source of the token */
93 SECURITY_IMPERSONATION_LEVEL impersonation_level; /* impersonation level this token is capable of if non-primary token */
100 unsigned enabled : 1; /* is the privilege currently enabled? */
101 unsigned def : 1; /* is the privilege enabled by default? */
107 unsigned enabled : 1; /* is the sid currently enabled? */
108 unsigned def : 1; /* is the sid enabled by default? */
109 unsigned logon : 1; /* is this a logon sid? */
110 unsigned mandatory: 1; /* is this sid always enabled? */
111 unsigned owner : 1; /* can this sid be an owner of an object? */
112 unsigned resource : 1; /* is this a domain-local group? */
113 unsigned deny_only: 1; /* is this a sid that should be use for denying only? */
117 static void token_dump( struct object *obj, int verbose );
118 static unsigned int token_map_access( struct object *obj, unsigned int access );
119 static void token_destroy( struct object *obj );
121 static const struct object_ops token_ops =
123 sizeof(struct token), /* size */
124 token_dump, /* dump */
125 no_add_queue, /* add_queue */
126 NULL, /* remove_queue */
128 NULL, /* satisfied */
129 no_signal, /* signal */
130 no_get_fd, /* get_fd */
131 token_map_access, /* map_access */
132 default_get_sd, /* get_sd */
133 default_set_sd, /* set_sd */
134 no_lookup_name, /* lookup_name */
135 no_open_file, /* open_file */
136 no_close_handle, /* close_handle */
137 token_destroy /* destroy */
141 static void token_dump( struct object *obj, int verbose )
143 fprintf( stderr, "Security token\n" );
144 /* FIXME: dump token members */
147 static unsigned int token_map_access( struct object *obj, unsigned int access )
149 if (access & GENERIC_READ) access |= TOKEN_READ;
150 if (access & GENERIC_WRITE) access |= TOKEN_WRITE;
151 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
152 if (access & GENERIC_ALL) access |= TOKEN_ALL_ACCESS;
153 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
156 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
159 SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
160 if (!sid) return NULL;
161 sid->Revision = SID_REVISION;
162 sid->SubAuthorityCount = subauthcount;
163 sid->IdentifierAuthority = *idauthority;
164 for (i = 0; i < subauthcount; i++)
165 sid->SubAuthority[i] = subauth[i];
169 void security_set_thread_token( struct thread *thread, obj_handle_t handle )
174 release_object( thread->token );
175 thread->token = NULL;
179 struct token *token = (struct token *)get_handle_obj( current->process,
186 release_object( thread->token );
187 thread->token = token;
192 const SID *security_unix_uid_to_sid( uid_t uid )
194 /* very simple mapping: either the current user or not the current user */
196 return &interactive_sid;
198 return &anonymous_logon_sid;
201 static int acl_is_valid( const ACL *acl, data_size_t size )
204 const ACE_HEADER *ace;
206 if (size < sizeof(ACL))
209 size = min(size, MAX_ACL_LEN);
213 ace = (const ACE_HEADER *)(acl + 1);
214 for (i = 0; i < acl->AceCount; i++)
217 data_size_t sid_size;
219 if (size < sizeof(ACE_HEADER))
221 if (size < ace->AceSize)
223 size -= ace->AceSize;
224 switch (ace->AceType)
226 case ACCESS_DENIED_ACE_TYPE:
227 sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
228 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
230 case ACCESS_ALLOWED_ACE_TYPE:
231 sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
232 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
234 case SYSTEM_AUDIT_ACE_TYPE:
235 sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
236 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
238 case SYSTEM_ALARM_ACE_TYPE:
239 sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
240 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
245 if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
246 sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
248 ace = ace_next( ace );
253 /* checks whether all members of a security descriptor fit inside the size
254 * of memory specified */
255 int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
257 size_t offset = sizeof(struct security_descriptor);
267 if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
268 (offset + sd->owner_len > size))
270 owner = sd_get_owner( sd );
273 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
274 if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
277 offset += sd->owner_len;
279 if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
280 (offset + sd->group_len > size))
282 group = sd_get_group( sd );
285 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
286 if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
289 offset += sd->group_len;
291 if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
293 sacl = sd_get_sacl( sd, &dummy );
294 if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
296 offset += sd->sacl_len;
298 if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
300 dacl = sd_get_dacl( sd, &dummy );
301 if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
303 offset += sd->dacl_len;
308 /* determines whether an object_attributes struct is valid in a buffer
309 * and calls set_error appropriately */
310 int objattr_is_valid( const struct object_attributes *objattr, data_size_t size )
312 if ((size < sizeof(*objattr)) || (size - sizeof(*objattr) < objattr->sd_len))
314 set_error( STATUS_ACCESS_VIOLATION );
320 const struct security_descriptor *sd = (const struct security_descriptor *)(objattr + 1);
321 if (!sd_is_valid( sd, objattr->sd_len ))
323 set_error( STATUS_INVALID_SECURITY_DESCR );
331 /* maps from generic rights to specific rights as given by a mapping */
332 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
334 if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
335 if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
336 if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
337 if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
341 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
343 return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
346 static inline void allocate_luid( luid_t *luid )
348 prev_luid_value.low_part++;
349 *luid = prev_luid_value;
352 DECL_HANDLER( allocate_locally_unique_id )
354 allocate_luid( &reply->luid );
357 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
359 out->Luid = in->luid;
361 (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
362 (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
365 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
367 struct privilege *privilege = mem_alloc( sizeof(*privilege) );
370 privilege->luid = *luid;
371 privilege->def = privilege->enabled = (enabled != 0);
372 list_add_tail( &token->privileges, &privilege->entry );
377 static inline void privilege_remove( struct privilege *privilege )
379 list_remove( &privilege->entry );
383 static void token_destroy( struct object *obj )
386 struct list *cursor, *cursor_next;
388 assert( obj->ops == &token_ops );
389 token = (struct token *)obj;
393 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
395 struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
396 privilege_remove( privilege );
399 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
401 struct group *group = LIST_ENTRY( cursor, struct group, entry );
402 list_remove( &group->entry );
406 free( token->default_dacl );
409 /* creates a new token.
410 * groups may be NULL if group_count is 0.
411 * privs may be NULL if priv_count is 0.
412 * default_dacl may be NULL, indicating that all objects created by the user
414 * modified_id may be NULL, indicating that a new modified_id luid should be
417 static struct token *create_token( unsigned primary, const SID *user,
418 const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
419 const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
420 const ACL *default_dacl, TOKEN_SOURCE source,
421 const luid_t *modified_id,
422 SECURITY_IMPERSONATION_LEVEL impersonation_level )
424 struct token *token = alloc_object( &token_ops );
429 allocate_luid( &token->token_id );
431 token->modified_id = *modified_id;
433 allocate_luid( &token->modified_id );
434 list_init( &token->privileges );
435 list_init( &token->groups );
436 token->primary = primary;
437 /* primary tokens don't have impersonation levels */
439 token->impersonation_level = -1;
441 token->impersonation_level = impersonation_level;
442 token->default_dacl = NULL;
443 token->primary_group = NULL;
446 token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
449 release_object( token );
454 for (i = 0; i < group_count; i++)
456 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
457 struct group *group = mem_alloc( size );
461 release_object( token );
464 memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
465 group->enabled = TRUE;
467 group->logon = FALSE;
468 group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
469 group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
470 group->resource = FALSE;
471 group->deny_only = FALSE;
472 list_add_tail( &token->groups, &group->entry );
473 /* Use first owner capable group as an owner */
474 if (!token->primary_group && group->owner)
475 token->primary_group = &group->sid;
478 /* copy privileges */
479 for (i = 0; i < priv_count; i++)
481 /* note: we don't check uniqueness: the caller must make sure
482 * privs doesn't contain any duplicate luids */
483 if (!privilege_add( token, &privs[i].Luid,
484 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
486 release_object( token );
493 token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
494 if (!token->default_dacl)
496 release_object( token );
501 token->source = source;
506 struct token *token_duplicate( struct token *src_token, unsigned primary,
507 SECURITY_IMPERSONATION_LEVEL impersonation_level )
509 const luid_t *modified_id =
510 primary || (impersonation_level == src_token->impersonation_level) ?
511 &src_token->modified_id : NULL;
512 struct token *token = NULL;
513 struct privilege *privilege;
516 if ((impersonation_level < SecurityAnonymous) ||
517 (impersonation_level > SecurityDelegation))
519 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
523 if (primary || (impersonation_level <= src_token->impersonation_level))
524 token = create_token( primary, src_token->user, NULL, 0,
525 NULL, 0, src_token->default_dacl,
526 src_token->source, modified_id,
527 impersonation_level );
528 else set_error( STATUS_BAD_IMPERSONATION_LEVEL );
530 if (!token) return token;
533 LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
535 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
536 struct group *newgroup = mem_alloc( size );
539 release_object( token );
542 memcpy( newgroup, group, size );
543 list_add_tail( &token->groups, &newgroup->entry );
545 token->primary_group = src_token->primary_group;
546 assert( token->primary_group );
548 /* copy privileges */
549 LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
550 if (!privilege_add( token, &privilege->luid, privilege->enabled ))
552 release_object( token );
559 static ACL *create_default_dacl( const SID *user )
561 ACCESS_ALLOWED_ACE *aaa;
564 size_t default_dacl_size = sizeof(ACL) +
565 2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
566 sizeof(local_system_sid) +
567 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
569 default_dacl = mem_alloc( default_dacl_size );
570 if (!default_dacl) return NULL;
572 default_dacl->AclRevision = ACL_REVISION;
573 default_dacl->Sbz1 = 0;
574 default_dacl->AclSize = default_dacl_size;
575 default_dacl->AceCount = 2;
576 default_dacl->Sbz2 = 0;
578 /* GENERIC_ALL for Local System */
579 aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
580 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
581 aaa->Header.AceFlags = 0;
582 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
583 sizeof(local_system_sid);
584 aaa->Mask = GENERIC_ALL;
585 sid = (SID *)&aaa->SidStart;
586 memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
588 /* GENERIC_ALL for specified user */
589 aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
590 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
591 aaa->Header.AceFlags = 0;
592 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
593 FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
594 aaa->Mask = GENERIC_ALL;
595 sid = (SID *)&aaa->SidStart;
596 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
603 SID_IDENTIFIER_AUTHORITY idauth;
605 unsigned int subauth[MAX_SUBAUTH_COUNT];
608 struct token *token_create_admin( void )
610 struct token *token = NULL;
611 static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
612 static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
613 static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
614 /* on Windows, this value changes every time the user logs on */
615 static const unsigned int logon_subauth[] = { SECURITY_LOGON_IDS_RID, 0, 1 /* FIXME: should be randomly generated when tokens are inherited by new processes */ };
616 PSID alias_admins_sid;
617 PSID alias_users_sid;
619 /* note: should be the owner specified in the token */
620 ACL *default_dacl = create_default_dacl( &interactive_sid );
622 alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
623 alias_admins_subauth );
624 alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
625 alias_users_subauth );
626 logon_sid = security_sid_alloc( &nt_authority, sizeof(logon_subauth)/sizeof(logon_subauth[0]),
629 if (alias_admins_sid && alias_users_sid && logon_sid && default_dacl)
631 const LUID_AND_ATTRIBUTES admin_privs[] =
633 { SeChangeNotifyPrivilege , SE_PRIVILEGE_ENABLED },
634 { SeSecurityPrivilege , 0 },
635 { SeBackupPrivilege , 0 },
636 { SeRestorePrivilege , 0 },
637 { SeSystemtimePrivilege , 0 },
638 { SeShutdownPrivilege , 0 },
639 { SeRemoteShutdownPrivilege , 0 },
640 { SeTakeOwnershipPrivilege , 0 },
641 { SeDebugPrivilege , 0 },
642 { SeSystemEnvironmentPrivilege , 0 },
643 { SeSystemProfilePrivilege , 0 },
644 { SeProfileSingleProcessPrivilege, 0 },
645 { SeIncreaseBasePriorityPrivilege, 0 },
646 { SeLoadDriverPrivilege , SE_PRIVILEGE_ENABLED },
647 { SeCreatePagefilePrivilege , 0 },
648 { SeIncreaseQuotaPrivilege , 0 },
649 { SeUndockPrivilege , 0 },
650 { SeManageVolumePrivilege , 0 },
651 { SeImpersonatePrivilege , SE_PRIVILEGE_ENABLED },
652 { SeCreateGlobalPrivilege , SE_PRIVILEGE_ENABLED },
654 /* note: we don't include non-builtin groups here for the user -
655 * telling us these is the job of a client-side program */
656 const SID_AND_ATTRIBUTES admin_groups[] =
658 { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
659 { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
660 { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
661 { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
662 { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
663 { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
664 { logon_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_LOGON_ID },
666 static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
667 token = create_token( TRUE, security_unix_uid_to_sid( getuid() ),
668 admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
669 admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
670 default_dacl, admin_source, NULL, -1 );
671 /* we really need a primary group */
672 assert( token->primary_group );
676 free( alias_admins_sid );
677 free( alias_users_sid );
678 free( default_dacl );
683 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
685 struct privilege *privilege;
686 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
688 if (is_equal_luid( luid, &privilege->luid ))
690 if (enabled_only && !privilege->enabled)
698 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
699 unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
700 unsigned int mod_privs_count )
702 unsigned int i, modified_count = 0;
704 /* mark as modified */
705 allocate_luid( &token->modified_id );
707 for (i = 0; i < count; i++)
709 struct privilege *privilege =
710 token_find_privilege( token, &privs[i].Luid, FALSE );
713 set_error( STATUS_NOT_ALL_ASSIGNED );
717 if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
718 privilege_remove( privilege );
721 /* save previous state for caller */
724 luid_and_attr_from_privilege(mod_privs, privilege);
730 if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
731 privilege->enabled = TRUE;
733 privilege->enabled = FALSE;
736 return modified_count;
739 static void token_disable_privileges( struct token *token )
741 struct privilege *privilege;
743 /* mark as modified */
744 allocate_luid( &token->modified_id );
746 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
747 privilege->enabled = FALSE;
750 int token_check_privileges( struct token *token, int all_required,
751 const LUID_AND_ATTRIBUTES *reqprivs,
752 unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
754 unsigned int i, enabled_count = 0;
756 for (i = 0; i < count; i++)
758 struct privilege *privilege =
759 token_find_privilege( token, &reqprivs[i].Luid, TRUE );
762 usedprivs[i] = reqprivs[i];
764 if (privilege && privilege->enabled)
768 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
773 return (enabled_count == count);
775 return (enabled_count > 0);
778 static int token_sid_present( struct token *token, const SID *sid, int deny )
782 if (security_equal_sid( token->user, sid )) return TRUE;
784 LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
786 if (!group->enabled) continue;
787 if (group->deny_only && !deny) continue;
789 if (security_equal_sid( &group->sid, sid )) return TRUE;
795 /* Checks access to a security descriptor. 'sd' must have been validated by
796 * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
797 * the reason. 'status' parameter will indicate if access is granted or denied.
799 * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
801 static unsigned int token_access_check( struct token *token,
802 const struct security_descriptor *sd,
803 unsigned int desired_access,
804 LUID_AND_ATTRIBUTES *privs,
805 unsigned int *priv_count,
806 const GENERIC_MAPPING *mapping,
807 unsigned int *granted_access,
808 unsigned int *status )
810 unsigned int current_access = 0;
811 unsigned int denied_access = 0;
815 const ACE_HEADER *ace;
818 /* assume no access rights */
821 /* fail if desired_access contains generic rights */
822 if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
825 return STATUS_GENERIC_NOT_MAPPED;
828 dacl = sd_get_dacl( sd, &dacl_present );
829 owner = sd_get_owner( sd );
830 if (!owner || !sd_get_group( sd ))
833 return STATUS_INVALID_SECURITY_DESCR;
836 /* 1: Grant desired access if the object is unprotected */
837 if (!dacl_present || !dacl)
840 *granted_access = desired_access;
841 return *status = STATUS_SUCCESS;
844 /* 2: Check if caller wants access to system security part. Note: access
845 * is only granted if specifically asked for */
846 if (desired_access & ACCESS_SYSTEM_SECURITY)
848 const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
849 LUID_AND_ATTRIBUTES retpriv = security_priv;
850 if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
854 /* assumes that there will only be one privilege to return */
855 if (*priv_count >= 1)
863 return STATUS_BUFFER_TOO_SMALL;
866 current_access |= ACCESS_SYSTEM_SECURITY;
867 if (desired_access == current_access)
869 *granted_access = current_access;
870 return *status = STATUS_SUCCESS;
876 *status = STATUS_PRIVILEGE_NOT_HELD;
877 return STATUS_SUCCESS;
880 else if (priv_count) *priv_count = 0;
882 /* 3: Check whether the token is the owner */
883 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
884 * checked when a "set owner" call is made, overriding the access rights
885 * determined here. */
886 if (token_sid_present( token, owner, FALSE ))
888 current_access |= (READ_CONTROL | WRITE_DAC);
889 if (desired_access == current_access)
891 *granted_access = current_access;
892 return *status = STATUS_SUCCESS;
896 /* 4: Grant rights according to the DACL */
897 ace = (const ACE_HEADER *)(dacl + 1);
898 for (i = 0; i < dacl->AceCount; i++, ace = ace_next( ace ))
900 const ACCESS_ALLOWED_ACE *aa_ace;
901 const ACCESS_DENIED_ACE *ad_ace;
904 if (ace->AceFlags & INHERIT_ONLY_ACE)
907 switch (ace->AceType)
909 case ACCESS_DENIED_ACE_TYPE:
910 ad_ace = (const ACCESS_DENIED_ACE *)ace;
911 sid = (const SID *)&ad_ace->SidStart;
912 if (token_sid_present( token, sid, TRUE ))
914 unsigned int access = ad_ace->Mask;
915 map_generic_mask(&access, mapping);
916 if (desired_access & MAXIMUM_ALLOWED)
917 denied_access |= access;
920 denied_access |= (access & ~current_access);
921 if (desired_access & access) goto done;
925 case ACCESS_ALLOWED_ACE_TYPE:
926 aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
927 sid = (const SID *)&aa_ace->SidStart;
928 if (token_sid_present( token, sid, FALSE ))
930 unsigned int access = aa_ace->Mask;
931 map_generic_mask(&access, mapping);
932 if (desired_access & MAXIMUM_ALLOWED)
933 current_access |= access;
935 current_access |= (access & ~denied_access);
940 /* don't bother carrying on checking if we've already got all of
942 if (desired_access == *granted_access)
947 if (desired_access & MAXIMUM_ALLOWED)
948 *granted_access = current_access & ~denied_access;
950 if ((current_access & desired_access) == desired_access)
951 *granted_access = current_access & desired_access;
955 *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
956 return STATUS_SUCCESS;
959 const ACL *token_get_default_dacl( struct token *token )
961 return token->default_dacl;
964 const SID *token_get_user( struct token *token )
969 const SID *token_get_primary_group( struct token *token )
971 return token->primary_group;
974 int check_object_access(struct object *obj, unsigned int *access)
976 GENERIC_MAPPING mapping;
977 struct token *token = current->token ? current->token : current->process->token;
978 LUID_AND_ATTRIBUTES priv;
979 unsigned int status, priv_count = 1;
982 mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );
986 if (*access & MAXIMUM_ALLOWED)
987 *access = mapping.GenericAll;
991 mapping.GenericRead = obj->ops->map_access( obj, GENERIC_READ );
992 mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
993 mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );
995 res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
996 &mapping, access, &status ) == STATUS_SUCCESS &&
997 status == STATUS_SUCCESS;
999 if (!res) set_error( STATUS_ACCESS_DENIED );
1004 /* open a security token */
1005 DECL_HANDLER(open_token)
1007 if (req->flags & OPEN_TOKEN_THREAD)
1009 struct thread *thread = get_thread_from_handle( req->handle, 0 );
1014 if (thread->token->impersonation_level <= SecurityAnonymous)
1015 set_error( STATUS_CANT_OPEN_ANONYMOUS );
1017 reply->token = alloc_handle( current->process, thread->token,
1018 req->access, req->attributes );
1021 set_error( STATUS_NO_TOKEN );
1022 release_object( thread );
1027 struct process *process = get_process_from_handle( req->handle, 0 );
1031 reply->token = alloc_handle( current->process, process->token, req->access,
1034 set_error( STATUS_NO_TOKEN );
1035 release_object( process );
1040 /* adjust the privileges held by a token */
1041 DECL_HANDLER(adjust_token_privileges)
1043 struct token *token;
1044 unsigned int access = TOKEN_ADJUST_PRIVILEGES;
1046 if (req->get_modified_state) access |= TOKEN_QUERY;
1048 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1049 access, &token_ops )))
1051 const LUID_AND_ATTRIBUTES *privs = get_req_data();
1052 LUID_AND_ATTRIBUTES *modified_privs = NULL;
1053 unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1054 unsigned int modified_priv_count = 0;
1056 if (req->get_modified_state && !req->disable_all)
1059 /* count modified privs */
1060 for (i = 0; i < priv_count; i++)
1062 struct privilege *privilege =
1063 token_find_privilege( token, &privs[i].Luid, FALSE );
1064 if (privilege && req->get_modified_state)
1065 modified_priv_count++;
1067 reply->len = modified_priv_count;
1068 modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
1069 if (modified_priv_count)
1070 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
1072 reply->len = modified_priv_count * sizeof(*modified_privs);
1074 if (req->disable_all)
1075 token_disable_privileges( token );
1077 modified_priv_count = token_adjust_privileges( token, privs,
1078 priv_count, modified_privs, modified_priv_count );
1080 release_object( token );
1084 /* retrieves the list of privileges that may be held be the token */
1085 DECL_HANDLER(get_token_privileges)
1087 struct token *token;
1089 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1094 LUID_AND_ATTRIBUTES *privs;
1095 struct privilege *privilege;
1097 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1100 reply->len = priv_count * sizeof(*privs);
1101 if (reply->len <= get_reply_max_size())
1103 privs = set_reply_data_size( priv_count * sizeof(*privs) );
1107 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1109 luid_and_attr_from_privilege( &privs[i], privilege );
1115 set_error(STATUS_BUFFER_TOO_SMALL);
1117 release_object( token );
1121 /* creates a duplicate of the token */
1122 DECL_HANDLER(duplicate_token)
1124 struct token *src_token;
1126 if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
1130 struct token *token = token_duplicate( src_token, req->primary, req->impersonation_level );
1133 reply->new_handle = alloc_handle( current->process, token, req->access, req->attributes);
1134 release_object( token );
1136 release_object( src_token );
1140 /* checks the specified privileges are held by the token */
1141 DECL_HANDLER(check_token_privileges)
1143 struct token *token;
1145 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1149 unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1151 if (!token->primary && token->impersonation_level <= SecurityAnonymous)
1152 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1153 else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1155 LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1156 reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1159 set_error( STATUS_BUFFER_OVERFLOW );
1160 release_object( token );
1164 /* checks that a user represented by a token is allowed to access an object
1165 * represented by a security descriptor */
1166 DECL_HANDLER(access_check)
1168 data_size_t sd_size = get_req_data_size();
1169 const struct security_descriptor *sd = get_req_data();
1170 struct token *token;
1172 if (!sd_is_valid( sd, sd_size ))
1174 set_error( STATUS_ACCESS_VIOLATION );
1178 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1182 GENERIC_MAPPING mapping;
1183 unsigned int status;
1184 LUID_AND_ATTRIBUTES priv;
1185 unsigned int priv_count = 1;
1187 memset(&priv, 0, sizeof(priv));
1189 /* only impersonation tokens may be used with this function */
1192 set_error( STATUS_NO_IMPERSONATION_TOKEN );
1193 release_object( token );
1196 /* anonymous impersonation tokens can't be used */
1197 if (token->impersonation_level <= SecurityAnonymous)
1199 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1200 release_object( token );
1204 mapping.GenericRead = req->mapping_read;
1205 mapping.GenericWrite = req->mapping_write;
1206 mapping.GenericExecute = req->mapping_execute;
1207 mapping.GenericAll = req->mapping_all;
1209 status = token_access_check(
1210 token, sd, req->desired_access, &priv, &priv_count, &mapping,
1211 &reply->access_granted, &reply->access_status );
1213 reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1215 if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1217 LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1218 memcpy( privs, &priv, sizeof(priv) );
1221 set_error( status );
1222 release_object( token );
1226 /* retrieves the SID of the user that the token represents */
1227 DECL_HANDLER(get_token_user)
1229 struct token *token;
1231 reply->user_len = 0;
1233 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1237 const SID *user = token->user;
1239 reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
1240 if (reply->user_len <= get_reply_max_size())
1242 SID *user_reply = set_reply_data_size( reply->user_len );
1244 memcpy( user_reply, user, reply->user_len );
1246 else set_error( STATUS_BUFFER_TOO_SMALL );
1248 release_object( token );
1252 /* retrieves the groups that the user represented by the token belongs to */
1253 DECL_HANDLER(get_token_groups)
1255 struct token *token;
1257 reply->user_len = 0;
1259 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1263 size_t size_needed = sizeof(struct token_groups);
1264 unsigned int group_count = 0;
1265 const struct group *group;
1267 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1270 size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
1272 size_needed += sizeof(unsigned int) * group_count;
1274 reply->user_len = size_needed;
1276 if (size_needed <= get_reply_max_size())
1278 struct token_groups *tg = set_reply_data_size( size_needed );
1281 unsigned int *attr_ptr = (unsigned int *)(tg + 1);
1282 SID *sid_ptr = (SID *)(attr_ptr + group_count);
1284 tg->count = group_count;
1286 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1290 if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
1291 if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
1292 if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
1293 if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
1294 if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
1295 if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;
1297 memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1299 sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1304 else set_error( STATUS_BUFFER_TOO_SMALL );
1306 release_object( token );
1310 DECL_HANDLER(get_token_impersonation_level)
1312 struct token *token;
1314 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1319 set_error( STATUS_INVALID_PARAMETER );
1321 reply->impersonation_level = token->impersonation_level;
1323 release_object( token );
1327 DECL_HANDLER(get_token_statistics)
1329 struct token *token;
1331 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1335 reply->token_id = token->token_id;
1336 reply->modified_id = token->modified_id;
1337 reply->primary = token->primary;
1338 reply->impersonation_level = token->impersonation_level;
1339 reply->group_count = list_count( &token->groups );
1340 reply->privilege_count = list_count( &token->privileges );
1342 release_object( token );