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_get_type, /* get_type */
126 no_add_queue, /* add_queue */
127 NULL, /* remove_queue */
129 NULL, /* satisfied */
130 no_signal, /* signal */
131 no_get_fd, /* get_fd */
132 token_map_access, /* map_access */
133 default_get_sd, /* get_sd */
134 default_set_sd, /* set_sd */
135 no_lookup_name, /* lookup_name */
136 no_open_file, /* open_file */
137 no_close_handle, /* close_handle */
138 token_destroy /* destroy */
142 static void token_dump( struct object *obj, int verbose )
144 fprintf( stderr, "Security token\n" );
145 /* FIXME: dump token members */
148 static unsigned int token_map_access( struct object *obj, unsigned int access )
150 if (access & GENERIC_READ) access |= TOKEN_READ;
151 if (access & GENERIC_WRITE) access |= TOKEN_WRITE;
152 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
153 if (access & GENERIC_ALL) access |= TOKEN_ALL_ACCESS;
154 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
157 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
160 SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
161 if (!sid) return NULL;
162 sid->Revision = SID_REVISION;
163 sid->SubAuthorityCount = subauthcount;
164 sid->IdentifierAuthority = *idauthority;
165 for (i = 0; i < subauthcount; i++)
166 sid->SubAuthority[i] = subauth[i];
170 void security_set_thread_token( struct thread *thread, obj_handle_t handle )
175 release_object( thread->token );
176 thread->token = NULL;
180 struct token *token = (struct token *)get_handle_obj( current->process,
187 release_object( thread->token );
188 thread->token = token;
193 const SID *security_unix_uid_to_sid( uid_t uid )
195 /* very simple mapping: either the current user or not the current user */
197 return &interactive_sid;
199 return &anonymous_logon_sid;
202 static int acl_is_valid( const ACL *acl, data_size_t size )
205 const ACE_HEADER *ace;
207 if (size < sizeof(ACL))
210 size = min(size, MAX_ACL_LEN);
214 ace = (const ACE_HEADER *)(acl + 1);
215 for (i = 0; i < acl->AceCount; i++)
218 data_size_t sid_size;
220 if (size < sizeof(ACE_HEADER))
222 if (size < ace->AceSize)
224 size -= ace->AceSize;
225 switch (ace->AceType)
227 case ACCESS_DENIED_ACE_TYPE:
228 sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
229 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
231 case ACCESS_ALLOWED_ACE_TYPE:
232 sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
233 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
235 case SYSTEM_AUDIT_ACE_TYPE:
236 sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
237 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
239 case SYSTEM_ALARM_ACE_TYPE:
240 sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
241 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
246 if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
247 sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
249 ace = ace_next( ace );
254 /* checks whether all members of a security descriptor fit inside the size
255 * of memory specified */
256 int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
258 size_t offset = sizeof(struct security_descriptor);
268 if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
269 (offset + sd->owner_len > size))
271 owner = sd_get_owner( sd );
274 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
275 if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
278 offset += sd->owner_len;
280 if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
281 (offset + sd->group_len > size))
283 group = sd_get_group( sd );
286 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
287 if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
290 offset += sd->group_len;
292 if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
294 sacl = sd_get_sacl( sd, &dummy );
295 if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
297 offset += sd->sacl_len;
299 if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
301 dacl = sd_get_dacl( sd, &dummy );
302 if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
304 offset += sd->dacl_len;
309 /* determines whether an object_attributes struct is valid in a buffer
310 * and calls set_error appropriately */
311 int objattr_is_valid( const struct object_attributes *objattr, data_size_t size )
313 if ((size < sizeof(*objattr)) || (size - sizeof(*objattr) < objattr->sd_len) ||
314 (size - sizeof(*objattr) - objattr->sd_len < objattr->name_len))
316 set_error( STATUS_ACCESS_VIOLATION );
322 const struct security_descriptor *sd = (const struct security_descriptor *)(objattr + 1);
323 if (!sd_is_valid( sd, objattr->sd_len ))
325 set_error( STATUS_INVALID_SECURITY_DESCR );
333 /* maps from generic rights to specific rights as given by a mapping */
334 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
336 if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
337 if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
338 if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
339 if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
343 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
345 return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
348 static inline void allocate_luid( luid_t *luid )
350 prev_luid_value.low_part++;
351 *luid = prev_luid_value;
354 DECL_HANDLER( allocate_locally_unique_id )
356 allocate_luid( &reply->luid );
359 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
361 out->Luid = in->luid;
363 (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
364 (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
367 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
369 struct privilege *privilege = mem_alloc( sizeof(*privilege) );
372 privilege->luid = *luid;
373 privilege->def = privilege->enabled = (enabled != 0);
374 list_add_tail( &token->privileges, &privilege->entry );
379 static inline void privilege_remove( struct privilege *privilege )
381 list_remove( &privilege->entry );
385 static void token_destroy( struct object *obj )
388 struct list *cursor, *cursor_next;
390 assert( obj->ops == &token_ops );
391 token = (struct token *)obj;
395 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
397 struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
398 privilege_remove( privilege );
401 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
403 struct group *group = LIST_ENTRY( cursor, struct group, entry );
404 list_remove( &group->entry );
408 free( token->default_dacl );
411 /* creates a new token.
412 * groups may be NULL if group_count is 0.
413 * privs may be NULL if priv_count is 0.
414 * default_dacl may be NULL, indicating that all objects created by the user
416 * modified_id may be NULL, indicating that a new modified_id luid should be
419 static struct token *create_token( unsigned primary, const SID *user,
420 const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
421 const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
422 const ACL *default_dacl, TOKEN_SOURCE source,
423 const luid_t *modified_id,
424 SECURITY_IMPERSONATION_LEVEL impersonation_level )
426 struct token *token = alloc_object( &token_ops );
431 allocate_luid( &token->token_id );
433 token->modified_id = *modified_id;
435 allocate_luid( &token->modified_id );
436 list_init( &token->privileges );
437 list_init( &token->groups );
438 token->primary = primary;
439 /* primary tokens don't have impersonation levels */
441 token->impersonation_level = -1;
443 token->impersonation_level = impersonation_level;
444 token->default_dacl = NULL;
445 token->primary_group = NULL;
448 token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
451 release_object( token );
456 for (i = 0; i < group_count; i++)
458 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
459 struct group *group = mem_alloc( size );
463 release_object( token );
466 memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
467 group->enabled = TRUE;
469 group->logon = FALSE;
470 group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
471 group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
472 group->resource = FALSE;
473 group->deny_only = FALSE;
474 list_add_tail( &token->groups, &group->entry );
475 /* Use first owner capable group as an owner */
476 if (!token->primary_group && group->owner)
477 token->primary_group = &group->sid;
480 /* copy privileges */
481 for (i = 0; i < priv_count; i++)
483 /* note: we don't check uniqueness: the caller must make sure
484 * privs doesn't contain any duplicate luids */
485 if (!privilege_add( token, &privs[i].Luid,
486 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
488 release_object( token );
495 token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
496 if (!token->default_dacl)
498 release_object( token );
503 token->source = source;
508 struct token *token_duplicate( struct token *src_token, unsigned primary,
509 SECURITY_IMPERSONATION_LEVEL impersonation_level )
511 const luid_t *modified_id =
512 primary || (impersonation_level == src_token->impersonation_level) ?
513 &src_token->modified_id : NULL;
514 struct token *token = NULL;
515 struct privilege *privilege;
518 if ((impersonation_level < SecurityAnonymous) ||
519 (impersonation_level > SecurityDelegation))
521 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
525 if (primary || (impersonation_level <= src_token->impersonation_level))
526 token = create_token( primary, src_token->user, NULL, 0,
527 NULL, 0, src_token->default_dacl,
528 src_token->source, modified_id,
529 impersonation_level );
530 else set_error( STATUS_BAD_IMPERSONATION_LEVEL );
532 if (!token) return token;
535 LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
537 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
538 struct group *newgroup = mem_alloc( size );
541 release_object( token );
544 memcpy( newgroup, group, size );
545 list_add_tail( &token->groups, &newgroup->entry );
547 token->primary_group = src_token->primary_group;
548 assert( token->primary_group );
550 /* copy privileges */
551 LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
552 if (!privilege_add( token, &privilege->luid, privilege->enabled ))
554 release_object( token );
561 static ACL *create_default_dacl( const SID *user )
563 ACCESS_ALLOWED_ACE *aaa;
566 size_t default_dacl_size = sizeof(ACL) +
567 2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
568 sizeof(local_system_sid) +
569 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
571 default_dacl = mem_alloc( default_dacl_size );
572 if (!default_dacl) return NULL;
574 default_dacl->AclRevision = ACL_REVISION;
575 default_dacl->Sbz1 = 0;
576 default_dacl->AclSize = default_dacl_size;
577 default_dacl->AceCount = 2;
578 default_dacl->Sbz2 = 0;
580 /* GENERIC_ALL for Local System */
581 aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
582 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
583 aaa->Header.AceFlags = 0;
584 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
585 sizeof(local_system_sid);
586 aaa->Mask = GENERIC_ALL;
587 sid = (SID *)&aaa->SidStart;
588 memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
590 /* GENERIC_ALL for specified user */
591 aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
592 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
593 aaa->Header.AceFlags = 0;
594 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
595 FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
596 aaa->Mask = GENERIC_ALL;
597 sid = (SID *)&aaa->SidStart;
598 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
605 SID_IDENTIFIER_AUTHORITY idauth;
607 unsigned int subauth[MAX_SUBAUTH_COUNT];
610 struct token *token_create_admin( void )
612 struct token *token = NULL;
613 static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
614 static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
615 static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
616 /* on Windows, this value changes every time the user logs on */
617 static const unsigned int logon_subauth[] = { SECURITY_LOGON_IDS_RID, 0, 1 /* FIXME: should be randomly generated when tokens are inherited by new processes */ };
618 PSID alias_admins_sid;
619 PSID alias_users_sid;
621 /* note: should be the owner specified in the token */
622 ACL *default_dacl = create_default_dacl( &interactive_sid );
624 alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
625 alias_admins_subauth );
626 alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
627 alias_users_subauth );
628 logon_sid = security_sid_alloc( &nt_authority, sizeof(logon_subauth)/sizeof(logon_subauth[0]),
631 if (alias_admins_sid && alias_users_sid && logon_sid && default_dacl)
633 const LUID_AND_ATTRIBUTES admin_privs[] =
635 { SeChangeNotifyPrivilege , SE_PRIVILEGE_ENABLED },
636 { SeSecurityPrivilege , 0 },
637 { SeBackupPrivilege , 0 },
638 { SeRestorePrivilege , 0 },
639 { SeSystemtimePrivilege , 0 },
640 { SeShutdownPrivilege , 0 },
641 { SeRemoteShutdownPrivilege , 0 },
642 { SeTakeOwnershipPrivilege , 0 },
643 { SeDebugPrivilege , 0 },
644 { SeSystemEnvironmentPrivilege , 0 },
645 { SeSystemProfilePrivilege , 0 },
646 { SeProfileSingleProcessPrivilege, 0 },
647 { SeIncreaseBasePriorityPrivilege, 0 },
648 { SeLoadDriverPrivilege , SE_PRIVILEGE_ENABLED },
649 { SeCreatePagefilePrivilege , 0 },
650 { SeIncreaseQuotaPrivilege , 0 },
651 { SeUndockPrivilege , 0 },
652 { SeManageVolumePrivilege , 0 },
653 { SeImpersonatePrivilege , SE_PRIVILEGE_ENABLED },
654 { SeCreateGlobalPrivilege , SE_PRIVILEGE_ENABLED },
656 /* note: we don't include non-builtin groups here for the user -
657 * telling us these is the job of a client-side program */
658 const SID_AND_ATTRIBUTES admin_groups[] =
660 { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
661 { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
662 { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
663 { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
664 { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
665 { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
666 { logon_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_LOGON_ID },
668 static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
669 token = create_token( TRUE, security_unix_uid_to_sid( getuid() ),
670 admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
671 admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
672 default_dacl, admin_source, NULL, -1 );
673 /* we really need a primary group */
674 assert( token->primary_group );
678 free( alias_admins_sid );
679 free( alias_users_sid );
680 free( default_dacl );
685 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
687 struct privilege *privilege;
688 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
690 if (is_equal_luid( luid, &privilege->luid ))
692 if (enabled_only && !privilege->enabled)
700 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
701 unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
702 unsigned int mod_privs_count )
704 unsigned int i, modified_count = 0;
706 /* mark as modified */
707 allocate_luid( &token->modified_id );
709 for (i = 0; i < count; i++)
711 struct privilege *privilege =
712 token_find_privilege( token, &privs[i].Luid, FALSE );
715 set_error( STATUS_NOT_ALL_ASSIGNED );
719 if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
720 privilege_remove( privilege );
723 /* save previous state for caller */
726 luid_and_attr_from_privilege(mod_privs, privilege);
732 if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
733 privilege->enabled = TRUE;
735 privilege->enabled = FALSE;
738 return modified_count;
741 static void token_disable_privileges( struct token *token )
743 struct privilege *privilege;
745 /* mark as modified */
746 allocate_luid( &token->modified_id );
748 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
749 privilege->enabled = FALSE;
752 int token_check_privileges( struct token *token, int all_required,
753 const LUID_AND_ATTRIBUTES *reqprivs,
754 unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
756 unsigned int i, enabled_count = 0;
758 for (i = 0; i < count; i++)
760 struct privilege *privilege =
761 token_find_privilege( token, &reqprivs[i].Luid, TRUE );
764 usedprivs[i] = reqprivs[i];
766 if (privilege && privilege->enabled)
770 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
775 return (enabled_count == count);
777 return (enabled_count > 0);
780 static int token_sid_present( struct token *token, const SID *sid, int deny )
784 if (security_equal_sid( token->user, sid )) return TRUE;
786 LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
788 if (!group->enabled) continue;
789 if (group->deny_only && !deny) continue;
791 if (security_equal_sid( &group->sid, sid )) return TRUE;
797 /* Checks access to a security descriptor. 'sd' must have been validated by
798 * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
799 * the reason. 'status' parameter will indicate if access is granted or denied.
801 * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
803 static unsigned int token_access_check( struct token *token,
804 const struct security_descriptor *sd,
805 unsigned int desired_access,
806 LUID_AND_ATTRIBUTES *privs,
807 unsigned int *priv_count,
808 const GENERIC_MAPPING *mapping,
809 unsigned int *granted_access,
810 unsigned int *status )
812 unsigned int current_access = 0;
813 unsigned int denied_access = 0;
817 const ACE_HEADER *ace;
820 /* assume no access rights */
823 /* fail if desired_access contains generic rights */
824 if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
827 return STATUS_GENERIC_NOT_MAPPED;
830 dacl = sd_get_dacl( sd, &dacl_present );
831 owner = sd_get_owner( sd );
832 if (!owner || !sd_get_group( sd ))
835 return STATUS_INVALID_SECURITY_DESCR;
838 /* 1: Grant desired access if the object is unprotected */
839 if (!dacl_present || !dacl)
842 *granted_access = desired_access;
843 return *status = STATUS_SUCCESS;
846 /* 2: Check if caller wants access to system security part. Note: access
847 * is only granted if specifically asked for */
848 if (desired_access & ACCESS_SYSTEM_SECURITY)
850 const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
851 LUID_AND_ATTRIBUTES retpriv = security_priv;
852 if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
856 /* assumes that there will only be one privilege to return */
857 if (*priv_count >= 1)
865 return STATUS_BUFFER_TOO_SMALL;
868 current_access |= ACCESS_SYSTEM_SECURITY;
869 if (desired_access == current_access)
871 *granted_access = current_access;
872 return *status = STATUS_SUCCESS;
878 *status = STATUS_PRIVILEGE_NOT_HELD;
879 return STATUS_SUCCESS;
882 else if (priv_count) *priv_count = 0;
884 /* 3: Check whether the token is the owner */
885 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
886 * checked when a "set owner" call is made, overriding the access rights
887 * determined here. */
888 if (token_sid_present( token, owner, FALSE ))
890 current_access |= (READ_CONTROL | WRITE_DAC);
891 if (desired_access == current_access)
893 *granted_access = current_access;
894 return *status = STATUS_SUCCESS;
898 /* 4: Grant rights according to the DACL */
899 ace = (const ACE_HEADER *)(dacl + 1);
900 for (i = 0; i < dacl->AceCount; i++, ace = ace_next( ace ))
902 const ACCESS_ALLOWED_ACE *aa_ace;
903 const ACCESS_DENIED_ACE *ad_ace;
906 if (ace->AceFlags & INHERIT_ONLY_ACE)
909 switch (ace->AceType)
911 case ACCESS_DENIED_ACE_TYPE:
912 ad_ace = (const ACCESS_DENIED_ACE *)ace;
913 sid = (const SID *)&ad_ace->SidStart;
914 if (token_sid_present( token, sid, TRUE ))
916 unsigned int access = ad_ace->Mask;
917 map_generic_mask(&access, mapping);
918 if (desired_access & MAXIMUM_ALLOWED)
919 denied_access |= access;
922 denied_access |= (access & ~current_access);
923 if (desired_access & access) goto done;
927 case ACCESS_ALLOWED_ACE_TYPE:
928 aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
929 sid = (const SID *)&aa_ace->SidStart;
930 if (token_sid_present( token, sid, FALSE ))
932 unsigned int access = aa_ace->Mask;
933 map_generic_mask(&access, mapping);
934 if (desired_access & MAXIMUM_ALLOWED)
935 current_access |= access;
937 current_access |= (access & ~denied_access);
942 /* don't bother carrying on checking if we've already got all of
944 if (desired_access == *granted_access)
949 if (desired_access & MAXIMUM_ALLOWED)
950 *granted_access = current_access & ~denied_access;
952 if ((current_access & desired_access) == desired_access)
953 *granted_access = current_access & desired_access;
957 *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
958 return STATUS_SUCCESS;
961 const ACL *token_get_default_dacl( struct token *token )
963 return token->default_dacl;
966 const SID *token_get_user( struct token *token )
971 const SID *token_get_primary_group( struct token *token )
973 return token->primary_group;
976 int check_object_access(struct object *obj, unsigned int *access)
978 GENERIC_MAPPING mapping;
979 struct token *token = current->token ? current->token : current->process->token;
980 LUID_AND_ATTRIBUTES priv;
981 unsigned int status, priv_count = 1;
984 mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );
988 if (*access & MAXIMUM_ALLOWED)
989 *access = mapping.GenericAll;
993 mapping.GenericRead = obj->ops->map_access( obj, GENERIC_READ );
994 mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
995 mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );
997 res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
998 &mapping, access, &status ) == STATUS_SUCCESS &&
999 status == STATUS_SUCCESS;
1001 if (!res) set_error( STATUS_ACCESS_DENIED );
1006 /* open a security token */
1007 DECL_HANDLER(open_token)
1009 if (req->flags & OPEN_TOKEN_THREAD)
1011 struct thread *thread = get_thread_from_handle( req->handle, 0 );
1016 if (thread->token->impersonation_level <= SecurityAnonymous)
1017 set_error( STATUS_CANT_OPEN_ANONYMOUS );
1019 reply->token = alloc_handle( current->process, thread->token,
1020 req->access, req->attributes );
1023 set_error( STATUS_NO_TOKEN );
1024 release_object( thread );
1029 struct process *process = get_process_from_handle( req->handle, 0 );
1033 reply->token = alloc_handle( current->process, process->token, req->access,
1036 set_error( STATUS_NO_TOKEN );
1037 release_object( process );
1042 /* adjust the privileges held by a token */
1043 DECL_HANDLER(adjust_token_privileges)
1045 struct token *token;
1046 unsigned int access = TOKEN_ADJUST_PRIVILEGES;
1048 if (req->get_modified_state) access |= TOKEN_QUERY;
1050 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1051 access, &token_ops )))
1053 const LUID_AND_ATTRIBUTES *privs = get_req_data();
1054 LUID_AND_ATTRIBUTES *modified_privs = NULL;
1055 unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1056 unsigned int modified_priv_count = 0;
1058 if (req->get_modified_state && !req->disable_all)
1061 /* count modified privs */
1062 for (i = 0; i < priv_count; i++)
1064 struct privilege *privilege =
1065 token_find_privilege( token, &privs[i].Luid, FALSE );
1066 if (privilege && req->get_modified_state)
1067 modified_priv_count++;
1069 reply->len = modified_priv_count;
1070 modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
1071 if (modified_priv_count)
1072 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
1074 reply->len = modified_priv_count * sizeof(*modified_privs);
1076 if (req->disable_all)
1077 token_disable_privileges( token );
1079 modified_priv_count = token_adjust_privileges( token, privs,
1080 priv_count, modified_privs, modified_priv_count );
1082 release_object( token );
1086 /* retrieves the list of privileges that may be held be the token */
1087 DECL_HANDLER(get_token_privileges)
1089 struct token *token;
1091 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1096 LUID_AND_ATTRIBUTES *privs;
1097 struct privilege *privilege;
1099 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1102 reply->len = priv_count * sizeof(*privs);
1103 if (reply->len <= get_reply_max_size())
1105 privs = set_reply_data_size( priv_count * sizeof(*privs) );
1109 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1111 luid_and_attr_from_privilege( &privs[i], privilege );
1117 set_error(STATUS_BUFFER_TOO_SMALL);
1119 release_object( token );
1123 /* creates a duplicate of the token */
1124 DECL_HANDLER(duplicate_token)
1126 struct token *src_token;
1128 if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
1132 struct token *token = token_duplicate( src_token, req->primary, req->impersonation_level );
1135 reply->new_handle = alloc_handle( current->process, token, req->access, req->attributes);
1136 release_object( token );
1138 release_object( src_token );
1142 /* checks the specified privileges are held by the token */
1143 DECL_HANDLER(check_token_privileges)
1145 struct token *token;
1147 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1151 unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1153 if (!token->primary && token->impersonation_level <= SecurityAnonymous)
1154 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1155 else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1157 LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1158 reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1161 set_error( STATUS_BUFFER_OVERFLOW );
1162 release_object( token );
1166 /* checks that a user represented by a token is allowed to access an object
1167 * represented by a security descriptor */
1168 DECL_HANDLER(access_check)
1170 data_size_t sd_size = get_req_data_size();
1171 const struct security_descriptor *sd = get_req_data();
1172 struct token *token;
1174 if (!sd_is_valid( sd, sd_size ))
1176 set_error( STATUS_ACCESS_VIOLATION );
1180 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1184 GENERIC_MAPPING mapping;
1185 unsigned int status;
1186 LUID_AND_ATTRIBUTES priv;
1187 unsigned int priv_count = 1;
1189 memset(&priv, 0, sizeof(priv));
1191 /* only impersonation tokens may be used with this function */
1194 set_error( STATUS_NO_IMPERSONATION_TOKEN );
1195 release_object( token );
1198 /* anonymous impersonation tokens can't be used */
1199 if (token->impersonation_level <= SecurityAnonymous)
1201 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1202 release_object( token );
1206 mapping.GenericRead = req->mapping_read;
1207 mapping.GenericWrite = req->mapping_write;
1208 mapping.GenericExecute = req->mapping_execute;
1209 mapping.GenericAll = req->mapping_all;
1211 status = token_access_check(
1212 token, sd, req->desired_access, &priv, &priv_count, &mapping,
1213 &reply->access_granted, &reply->access_status );
1215 reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1217 if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1219 LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1220 memcpy( privs, &priv, sizeof(priv) );
1223 set_error( status );
1224 release_object( token );
1228 /* retrieves the SID of the user that the token represents */
1229 DECL_HANDLER(get_token_user)
1231 struct token *token;
1233 reply->user_len = 0;
1235 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1239 const SID *user = token->user;
1241 reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
1242 if (reply->user_len <= get_reply_max_size())
1244 SID *user_reply = set_reply_data_size( reply->user_len );
1246 memcpy( user_reply, user, reply->user_len );
1248 else set_error( STATUS_BUFFER_TOO_SMALL );
1250 release_object( token );
1254 /* retrieves the groups that the user represented by the token belongs to */
1255 DECL_HANDLER(get_token_groups)
1257 struct token *token;
1259 reply->user_len = 0;
1261 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1265 size_t size_needed = sizeof(struct token_groups);
1266 unsigned int group_count = 0;
1267 const struct group *group;
1269 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1272 size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
1274 size_needed += sizeof(unsigned int) * group_count;
1276 reply->user_len = size_needed;
1278 if (size_needed <= get_reply_max_size())
1280 struct token_groups *tg = set_reply_data_size( size_needed );
1283 unsigned int *attr_ptr = (unsigned int *)(tg + 1);
1284 SID *sid_ptr = (SID *)(attr_ptr + group_count);
1286 tg->count = group_count;
1288 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1292 if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
1293 if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
1294 if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
1295 if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
1296 if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
1297 if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;
1299 memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1301 sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1306 else set_error( STATUS_BUFFER_TOO_SMALL );
1308 release_object( token );
1312 DECL_HANDLER(get_token_impersonation_level)
1314 struct token *token;
1316 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1321 set_error( STATUS_INVALID_PARAMETER );
1323 reply->impersonation_level = token->impersonation_level;
1325 release_object( token );
1329 DECL_HANDLER(get_token_statistics)
1331 struct token *token;
1333 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1337 reply->token_id = token->token_id;
1338 reply->modified_id = token->modified_id;
1339 reply->primary = token->primary;
1340 reply->impersonation_level = token->impersonation_level;
1341 reply->group_count = list_count( &token->groups );
1342 reply->privilege_count = list_count( &token->privileges );
1344 release_object( token );