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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #define WIN32_NO_STATUS
41 #include "wine/unicode.h"
43 #define MAX_SUBAUTH_COUNT 1
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 };
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
;
79 struct object obj
; /* object header */
80 struct list privileges
; /* privileges available to the token */
81 struct list groups
; /* groups that the user of this token belongs to (sid_and_attributes) */
82 SID
*user
; /* SID of user this token represents */
83 unsigned primary
; /* is this a primary or impersonation token? */
84 ACL
*default_dacl
; /* the default DACL to assign to objects created by this user */
91 unsigned enabled
: 1; /* is the privilege currently enabled? */
92 unsigned def
: 1; /* is the privilege enabled by default? */
95 struct sid_and_attributes
98 unsigned enabled
: 1; /* is the sid currently enabled? */
99 unsigned def
: 1; /* is the sid enabled by default? */
100 unsigned logon
: 1; /* is this a logon sid? */
101 unsigned mandatory
: 1; /* is this sid always enabled? */
102 unsigned owner
: 1; /* can this sid be an owner of an object? */
103 unsigned resource
: 1; /* is this a domain-local group? */
104 unsigned deny_only
: 1; /* is this a sid that should be use for denying only? */
108 static void token_dump( struct object
*obj
, int verbose
);
109 static void token_destroy( struct object
*obj
);
111 static const struct object_ops token_ops
=
113 sizeof(struct token
), /* size */
114 token_dump
, /* dump */
115 no_add_queue
, /* add_queue */
116 NULL
, /* remove_queue */
118 NULL
, /* satisfied */
119 no_signal
, /* signal */
120 no_get_fd
, /* get_fd */
121 no_lookup_name
, /* lookup_name */
122 no_close_handle
, /* close_handle */
123 token_destroy
/* destroy */
127 static void token_dump( struct object
*obj
, int verbose
)
129 fprintf( stderr
, "Security token\n" );
130 /* FIXME: dump token members */
133 static SID
*security_sid_alloc( const SID_IDENTIFIER_AUTHORITY
*idauthority
, int subauthcount
, const unsigned int subauth
[] )
136 SID
*sid
= mem_alloc( FIELD_OFFSET(SID
, SubAuthority
[subauthcount
]) );
137 if (!sid
) return NULL
;
138 sid
->Revision
= SID_REVISION
;
139 sid
->SubAuthorityCount
= subauthcount
;
140 sid
->IdentifierAuthority
= *idauthority
;
141 for (i
= 0; i
< subauthcount
; i
++)
142 sid
->SubAuthority
[i
] = subauth
[i
];
146 static inline int security_equal_sid( const SID
*sid1
, const SID
*sid2
)
148 return ((sid1
->SubAuthorityCount
== sid2
->SubAuthorityCount
) &&
149 !memcmp( sid1
, sid2
, FIELD_OFFSET(SID
, SubAuthority
[sid1
->SubAuthorityCount
]) ));
152 void security_set_thread_token( struct thread
*thread
, obj_handle_t handle
)
157 release_object( thread
->token
);
158 thread
->token
= NULL
;
162 struct token
*token
= (struct token
*)get_handle_obj( current
->process
,
169 release_object( thread
->token
);
170 thread
->token
= token
;
175 static const ACE_HEADER
*ace_next( const ACE_HEADER
*ace
)
177 return (const ACE_HEADER
*)((const char *)ace
+ ace
->AceSize
);
180 static int acl_is_valid( const ACL
*acl
, size_t size
)
183 const ACE_HEADER
*ace
;
185 if (size
< sizeof(ACL
))
188 size
= min(size
, MAX_ACL_LEN
);
192 ace
= (const ACE_HEADER
*)(acl
+ 1);
193 for (i
= 0; i
< acl
->AceCount
; i
++)
198 if (size
< sizeof(ACE_HEADER
))
200 if (size
< ace
->AceSize
)
202 size
-= ace
->AceSize
;
203 switch (ace
->AceType
)
205 case ACCESS_DENIED_ACE_TYPE
:
206 sid
= (const SID
*)&((const ACCESS_DENIED_ACE
*)ace
)->SidStart
;
207 sid_size
= ace
->AceSize
- FIELD_OFFSET(ACCESS_DENIED_ACE
, SidStart
);
209 case ACCESS_ALLOWED_ACE_TYPE
:
210 sid
= (const SID
*)&((const ACCESS_ALLOWED_ACE
*)ace
)->SidStart
;
211 sid_size
= ace
->AceSize
- FIELD_OFFSET(ACCESS_ALLOWED_ACE
, SidStart
);
213 case SYSTEM_AUDIT_ACE_TYPE
:
214 sid
= (const SID
*)&((const SYSTEM_AUDIT_ACE
*)ace
)->SidStart
;
215 sid_size
= ace
->AceSize
- FIELD_OFFSET(SYSTEM_AUDIT_ACE
, SidStart
);
217 case SYSTEM_ALARM_ACE_TYPE
:
218 sid
= (const SID
*)&((const SYSTEM_ALARM_ACE
*)ace
)->SidStart
;
219 sid_size
= ace
->AceSize
- FIELD_OFFSET(SYSTEM_ALARM_ACE
, SidStart
);
224 if (sid_size
< FIELD_OFFSET(SID
, SubAuthority
[0]) ||
225 sid_size
< FIELD_OFFSET(SID
, SubAuthority
[sid
->SubAuthorityCount
]))
227 ace
= ace_next( ace
);
232 /* gets the discretionary access control list from a security descriptor */
233 static inline const ACL
*sd_get_dacl( const struct security_descriptor
*sd
, int *present
)
235 *present
= (sd
->control
& SE_DACL_PRESENT
? TRUE
: FALSE
);
238 return (const ACL
*)((const char *)(sd
+ 1) +
239 sd
->owner_len
+ sd
->group_len
+ sd
->sacl_len
);
244 /* gets the system access control list from a security descriptor */
245 static inline const ACL
*sd_get_sacl( const struct security_descriptor
*sd
, int *present
)
247 *present
= (sd
->control
& SE_SACL_PRESENT
? TRUE
: FALSE
);
250 return (const ACL
*)((const char *)(sd
+ 1) +
251 sd
->owner_len
+ sd
->group_len
);
256 /* gets the owner from a security descriptor */
257 static inline const SID
*sd_get_owner( const struct security_descriptor
*sd
)
260 return (const SID
*)(sd
+ 1);
265 /* gets the primary group from a security descriptor */
266 static inline const SID
*sd_get_group( const struct security_descriptor
*sd
)
269 return (const SID
*)((const char *)(sd
+ 1) + sd
->owner_len
);
274 /* checks whether all members of a security descriptor fit inside the size
275 * of memory specified */
276 static int sd_is_valid( const struct security_descriptor
*sd
, size_t size
)
278 size_t offset
= sizeof(struct security_descriptor
);
288 if ((sd
->owner_len
>= FIELD_OFFSET(SID
, SubAuthority
[255])) ||
289 (offset
+ sd
->owner_len
> size
))
291 owner
= sd_get_owner( sd
);
294 size_t needed_size
= FIELD_OFFSET(SID
, SubAuthority
[owner
->SubAuthorityCount
]);
295 if ((sd
->owner_len
< sizeof(SID
)) || (needed_size
> sd
->owner_len
))
298 offset
+= sd
->owner_len
;
300 if ((sd
->group_len
>= FIELD_OFFSET(SID
, SubAuthority
[255])) ||
301 (offset
+ sd
->group_len
> size
))
303 group
= sd_get_group( sd
);
306 size_t needed_size
= FIELD_OFFSET(SID
, SubAuthority
[group
->SubAuthorityCount
]);
307 if ((sd
->owner_len
< sizeof(SID
)) || (needed_size
> sd
->owner_len
))
310 offset
+= sd
->group_len
;
312 if ((sd
->sacl_len
>= MAX_ACL_LEN
) || (offset
+ sd
->sacl_len
> size
))
314 sacl
= sd_get_sacl( sd
, &dummy
);
315 if (sacl
&& !acl_is_valid( sacl
, sd
->sacl_len
))
317 offset
+= sd
->sacl_len
;
319 if ((sd
->dacl_len
>= MAX_ACL_LEN
) || (offset
+ sd
->dacl_len
> size
))
321 dacl
= sd_get_dacl( sd
, &dummy
);
322 if (dacl
&& !acl_is_valid( dacl
, sd
->dacl_len
))
324 offset
+= sd
->dacl_len
;
329 /* maps from generic rights to specific rights as given by a mapping */
330 static inline void map_generic_mask(unsigned int *mask
, const GENERIC_MAPPING
*mapping
)
332 if (*mask
& GENERIC_READ
) *mask
|= mapping
->GenericRead
;
333 if (*mask
& GENERIC_WRITE
) *mask
|= mapping
->GenericWrite
;
334 if (*mask
& GENERIC_EXECUTE
) *mask
|= mapping
->GenericExecute
;
335 if (*mask
& GENERIC_ALL
) *mask
|= mapping
->GenericAll
;
339 static inline int is_equal_luid( const LUID
*luid1
, const LUID
*luid2
)
341 return (luid1
->LowPart
== luid2
->LowPart
&& luid1
->HighPart
== luid2
->HighPart
);
344 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES
*out
, const struct privilege
*in
)
346 out
->Luid
= in
->luid
;
348 (in
->enabled
? SE_PRIVILEGE_ENABLED
: 0) |
349 (in
->def
? SE_PRIVILEGE_ENABLED_BY_DEFAULT
: 0);
352 static struct privilege
*privilege_add( struct token
*token
, const LUID
*luid
, int enabled
)
354 struct privilege
*privilege
= mem_alloc( sizeof(*privilege
) );
357 privilege
->luid
= *luid
;
358 privilege
->def
= privilege
->enabled
= (enabled
!= 0);
359 list_add_tail( &token
->privileges
, &privilege
->entry
);
364 static inline void privilege_remove( struct privilege
*privilege
)
366 list_remove( &privilege
->entry
);
370 static void token_destroy( struct object
*obj
)
373 struct list
*cursor
, *cursor_next
;
375 assert( obj
->ops
== &token_ops
);
376 token
= (struct token
*)obj
;
380 LIST_FOR_EACH_SAFE( cursor
, cursor_next
, &token
->privileges
)
382 struct privilege
*privilege
= LIST_ENTRY( cursor
, struct privilege
, entry
);
383 privilege_remove( privilege
);
386 LIST_FOR_EACH_SAFE( cursor
, cursor_next
, &token
->groups
)
388 struct sid_and_attributes
*group
= LIST_ENTRY( cursor
, struct sid_and_attributes
, entry
);
389 list_remove( &group
->entry
);
393 free( token
->default_dacl
);
396 /* creates a new token.
397 * groups may be NULL if group_count is 0.
398 * privs may be NULL if priv_count is 0.
399 * default_dacl may be NULL, indicating that all objects created by the user
402 static struct token
*create_token( unsigned primary
, const SID
*user
,
403 const SID_AND_ATTRIBUTES
*groups
, unsigned int group_count
,
404 const LUID_AND_ATTRIBUTES
*privs
, unsigned int priv_count
,
405 const ACL
*default_dacl
)
407 struct token
*token
= alloc_object( &token_ops
);
412 list_init( &token
->privileges
);
413 list_init( &token
->groups
);
414 token
->primary
= primary
;
417 token
->user
= memdup( user
, FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]) );
420 release_object( token
);
425 for (i
= 0; i
< group_count
; i
++)
427 size_t size
= FIELD_OFFSET( struct sid_and_attributes
, sid
.SubAuthority
[((const SID
*)groups
[i
].Sid
)->SubAuthorityCount
] );
428 struct sid_and_attributes
*group
= mem_alloc( size
);
429 memcpy( &group
->sid
, groups
[i
].Sid
, FIELD_OFFSET( SID
, SubAuthority
[((const SID
*)groups
[i
].Sid
)->SubAuthorityCount
] ) );
430 group
->enabled
= TRUE
;
432 group
->logon
= FALSE
;
433 group
->mandatory
= (groups
[i
].Attributes
& SE_GROUP_MANDATORY
) ? TRUE
: FALSE
;
434 group
->owner
= FALSE
;
435 group
->resource
= FALSE
;
436 group
->deny_only
= FALSE
;
437 list_add_tail( &token
->groups
, &group
->entry
);
440 /* copy privileges */
441 for (i
= 0; i
< priv_count
; i
++)
443 /* note: we don't check uniqueness: the caller must make sure
444 * privs doesn't contain any duplicate luids */
445 if (!privilege_add( token
, &privs
[i
].Luid
,
446 privs
[i
].Attributes
& SE_PRIVILEGE_ENABLED
))
448 release_object( token
);
455 token
->default_dacl
= memdup( default_dacl
, default_dacl
->AclSize
);
456 if (!token
->default_dacl
)
458 release_object( token
);
463 token
->default_dacl
= NULL
;
468 static ACL
*create_default_dacl( const SID
*user
)
470 ACCESS_ALLOWED_ACE
*aaa
;
473 size_t default_dacl_size
= sizeof(ACL
) +
474 2*(sizeof(ACCESS_ALLOWED_ACE
) - sizeof(DWORD
)) +
475 sizeof(local_system_sid
) +
476 FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]);
478 default_dacl
= mem_alloc( default_dacl_size
);
479 if (!default_dacl
) return NULL
;
481 default_dacl
->AclRevision
= MAX_ACL_REVISION
;
482 default_dacl
->Sbz1
= 0;
483 default_dacl
->AclSize
= default_dacl_size
;
484 default_dacl
->AceCount
= 2;
485 default_dacl
->Sbz2
= 0;
487 /* GENERIC_ALL for Local System */
488 aaa
= (ACCESS_ALLOWED_ACE
*)(default_dacl
+ 1);
489 aaa
->Header
.AceType
= ACCESS_ALLOWED_ACE_TYPE
;
490 aaa
->Header
.AceFlags
= 0;
491 aaa
->Header
.AceSize
= (sizeof(ACCESS_ALLOWED_ACE
) - sizeof(DWORD
)) +
492 sizeof(local_system_sid
);
493 aaa
->Mask
= GENERIC_ALL
;
494 sid
= (SID
*)&aaa
->SidStart
;
495 memcpy( sid
, &local_system_sid
, sizeof(local_system_sid
) );
497 /* GENERIC_ALL for specified user */
498 aaa
= (ACCESS_ALLOWED_ACE
*)((const char *)aaa
+ aaa
->Header
.AceSize
);
499 aaa
->Header
.AceType
= ACCESS_ALLOWED_ACE_TYPE
;
500 aaa
->Header
.AceFlags
= 0;
501 aaa
->Header
.AceSize
= (sizeof(ACCESS_ALLOWED_ACE
) - sizeof(DWORD
)) +
502 FIELD_OFFSET( SID
, SubAuthority
[user
->SubAuthorityCount
] );
503 aaa
->Mask
= GENERIC_ALL
;
504 sid
= (SID
*)&aaa
->SidStart
;
505 memcpy( sid
, user
, FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]) );
512 SID_IDENTIFIER_AUTHORITY idauth
;
514 unsigned int subauth
[MAX_SUBAUTH_COUNT
];
517 struct token
*token_create_admin( void )
519 struct token
*token
= NULL
;
520 static const SID_IDENTIFIER_AUTHORITY nt_authority
= { SECURITY_NT_AUTHORITY
};
521 static const unsigned int alias_admins_subauth
[] = { SECURITY_BUILTIN_DOMAIN_RID
, DOMAIN_ALIAS_RID_ADMINS
};
522 static const unsigned int alias_users_subauth
[] = { SECURITY_BUILTIN_DOMAIN_RID
, DOMAIN_ALIAS_RID_USERS
};
523 PSID alias_admins_sid
;
524 PSID alias_users_sid
;
525 ACL
*default_dacl
= create_default_dacl( &local_system_sid
);
527 alias_admins_sid
= security_sid_alloc( &nt_authority
, sizeof(alias_admins_subauth
)/sizeof(alias_admins_subauth
[0]),
528 alias_admins_subauth
);
529 alias_users_sid
= security_sid_alloc( &nt_authority
, sizeof(alias_users_subauth
)/sizeof(alias_users_subauth
[0]),
530 alias_users_subauth
);
532 if (alias_admins_sid
&& alias_users_sid
&& default_dacl
)
534 const LUID_AND_ATTRIBUTES admin_privs
[] =
536 { SeChangeNotifyPrivilege
, SE_PRIVILEGE_ENABLED
},
537 { SeSecurityPrivilege
, 0 },
538 { SeBackupPrivilege
, 0 },
539 { SeRestorePrivilege
, 0 },
540 { SeSystemtimePrivilege
, 0 },
541 { SeShutdownPrivilege
, 0 },
542 { SeRemoteShutdownPrivilege
, 0 },
543 { SeTakeOwnershipPrivilege
, 0 },
544 { SeDebugPrivilege
, 0 },
545 { SeSystemEnvironmentPrivilege
, 0 },
546 { SeSystemProfilePrivilege
, 0 },
547 { SeProfileSingleProcessPrivilege
, 0 },
548 { SeIncreaseBasePriorityPrivilege
, 0 },
549 { SeLoadDriverPrivilege
, 0 },
550 { SeCreatePagefilePrivilege
, 0 },
551 { SeIncreaseQuotaPrivilege
, 0 },
552 { SeUndockPrivilege
, 0 },
553 { SeManageVolumePrivilege
, 0 },
554 { SeImpersonatePrivilege
, SE_PRIVILEGE_ENABLED
},
555 { SeCreateGlobalPrivilege
, SE_PRIVILEGE_ENABLED
},
557 /* note: we don't include non-builtin groups here for the user -
558 * telling us these is the job of a client-side program */
559 const SID_AND_ATTRIBUTES admin_groups
[] =
561 { security_world_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
562 { security_local_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
563 { security_interactive_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
564 { security_authenticated_user_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
565 { alias_admins_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
566 { alias_users_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
568 /* note: we just set the user sid to be the interactive builtin sid -
569 * we should really translate the UNIX user id to a sid */
570 token
= create_token( TRUE
, &interactive_sid
,
571 admin_groups
, sizeof(admin_groups
)/sizeof(admin_groups
[0]),
572 admin_privs
, sizeof(admin_privs
)/sizeof(admin_privs
[0]),
576 if (alias_admins_sid
)
577 free( alias_admins_sid
);
579 free( alias_users_sid
);
581 free( default_dacl
);
586 static struct privilege
*token_find_privilege( struct token
*token
, const LUID
*luid
, int enabled_only
)
588 struct privilege
*privilege
;
589 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
591 if (is_equal_luid( luid
, &privilege
->luid
))
593 if (enabled_only
&& !privilege
->enabled
)
601 static unsigned int token_adjust_privileges( struct token
*token
, const LUID_AND_ATTRIBUTES
*privs
,
602 unsigned int count
, LUID_AND_ATTRIBUTES
*mod_privs
,
603 unsigned int mod_privs_count
)
606 unsigned int modified_count
= 0;
608 for (i
= 0; i
< count
; i
++)
610 struct privilege
*privilege
=
611 token_find_privilege( token
, &privs
[i
].Luid
, FALSE
);
614 set_error( STATUS_NOT_ALL_ASSIGNED
);
618 if (privs
[i
].Attributes
& SE_PRIVILEGE_REMOVE
)
619 privilege_remove( privilege
);
622 /* save previous state for caller */
625 luid_and_attr_from_privilege(mod_privs
, privilege
);
631 if (privs
[i
].Attributes
& SE_PRIVILEGE_ENABLED
)
632 privilege
->enabled
= TRUE
;
634 privilege
->enabled
= FALSE
;
637 return modified_count
;
640 static void token_disable_privileges( struct token
*token
)
642 struct privilege
*privilege
;
643 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
644 privilege
->enabled
= FALSE
;
647 int token_check_privileges( struct token
*token
, int all_required
,
648 const LUID_AND_ATTRIBUTES
*reqprivs
,
649 unsigned int count
, LUID_AND_ATTRIBUTES
*usedprivs
)
652 unsigned int enabled_count
= 0;
654 for (i
= 0; i
< count
; i
++)
656 struct privilege
*privilege
=
657 token_find_privilege( token
, &reqprivs
[i
].Luid
, TRUE
);
660 usedprivs
[i
] = reqprivs
[i
];
662 if (privilege
&& privilege
->enabled
)
666 usedprivs
[i
].Attributes
|= SE_PRIVILEGE_USED_FOR_ACCESS
;
671 return (enabled_count
== count
);
673 return (enabled_count
> 0);
676 static int token_sid_present( struct token
*token
, const SID
*sid
, int deny
)
678 struct sid_and_attributes
*group
;
680 if (security_equal_sid( token
->user
, sid
)) return TRUE
;
682 LIST_FOR_EACH_ENTRY( group
, &token
->groups
, struct sid_and_attributes
, entry
)
684 if (!group
->enabled
) continue;
685 if (group
->deny_only
&& !deny
) continue;
687 if (security_equal_sid( &group
->sid
, sid
)) return TRUE
;
693 /* checks access to a security descriptor. sd must have been validated by caller.
694 * it returns STATUS_SUCCESS if access was granted to the object, or an error
695 * status code if not, giving the reason. errors not relating to giving access
696 * to the object are returned in the status parameter. granted_access and
697 * status always have a valid value stored in them on return. */
698 static unsigned int token_access_check( struct token
*token
,
699 const struct security_descriptor
*sd
,
700 unsigned int desired_access
,
701 LUID_AND_ATTRIBUTES
*privs
,
702 unsigned int *priv_count
,
703 const GENERIC_MAPPING
*mapping
,
704 unsigned int *granted_access
,
705 unsigned int *status
)
707 unsigned int current_access
= 0;
708 unsigned int denied_access
= 0;
712 const ACE_HEADER
*ace
;
715 /* assume success, but no access rights */
716 *status
= STATUS_SUCCESS
;
719 /* fail if desired_access contains generic rights */
720 if (desired_access
& (GENERIC_READ
|GENERIC_WRITE
|GENERIC_EXECUTE
|GENERIC_ALL
))
723 *status
= STATUS_GENERIC_NOT_MAPPED
;
724 return STATUS_ACCESS_DENIED
;
727 dacl
= sd_get_dacl( sd
, &dacl_present
);
728 owner
= sd_get_owner( sd
);
729 if (!owner
|| !sd_get_group( sd
))
732 *status
= STATUS_INVALID_SECURITY_DESCR
;
733 return STATUS_ACCESS_DENIED
;
736 /* 1: Grant desired access if the object is unprotected */
740 *granted_access
= desired_access
;
741 return STATUS_SUCCESS
;
746 return STATUS_ACCESS_DENIED
;
749 /* 2: Check if caller wants access to system security part. Note: access
750 * is only granted if specifically asked for */
751 if (desired_access
& ACCESS_SYSTEM_SECURITY
)
753 const LUID_AND_ATTRIBUTES security_priv
= { SeSecurityPrivilege
, 0 };
754 LUID_AND_ATTRIBUTES retpriv
= security_priv
;
755 if (token_check_privileges( token
, TRUE
, &security_priv
, 1, &retpriv
))
759 /* assumes that there will only be one privilege to return */
760 if (*priv_count
>= 1)
768 return STATUS_BUFFER_TOO_SMALL
;
771 current_access
|= ACCESS_SYSTEM_SECURITY
;
772 if (desired_access
== current_access
)
774 *granted_access
= current_access
;
775 return STATUS_SUCCESS
;
781 return STATUS_PRIVILEGE_NOT_HELD
;
784 else if (priv_count
) *priv_count
= 0;
786 /* 3: Check whether the token is the owner */
787 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
788 * checked when a "set owner" call is made, overriding the access rights
789 * determined here. */
790 if (token_sid_present( token
, owner
, FALSE
))
792 current_access
|= (READ_CONTROL
| WRITE_DAC
);
793 if (desired_access
== current_access
)
795 *granted_access
= current_access
;
796 return STATUS_SUCCESS
;
800 /* 4: Grant rights according to the DACL */
801 ace
= (const ACE_HEADER
*)(dacl
+ 1);
802 for (i
= 0; i
< dacl
->AceCount
; i
++)
804 const ACCESS_ALLOWED_ACE
*aa_ace
;
805 const ACCESS_DENIED_ACE
*ad_ace
;
807 switch (ace
->AceType
)
809 case ACCESS_DENIED_ACE_TYPE
:
810 ad_ace
= (const ACCESS_DENIED_ACE
*)ace
;
811 sid
= (const SID
*)&ad_ace
->SidStart
;
812 if (token_sid_present( token
, sid
, TRUE
))
814 unsigned int access
= ad_ace
->Mask
;
815 map_generic_mask(&access
, mapping
);
816 if (desired_access
& MAXIMUM_ALLOWED
)
817 denied_access
|= access
;
820 denied_access
|= (access
& ~current_access
);
821 if (desired_access
& access
)
824 return STATUS_SUCCESS
;
829 case ACCESS_ALLOWED_ACE_TYPE
:
830 aa_ace
= (const ACCESS_ALLOWED_ACE
*)ace
;
831 sid
= (const SID
*)&aa_ace
->SidStart
;
832 if (token_sid_present( token
, sid
, FALSE
))
834 unsigned int access
= aa_ace
->Mask
;
835 map_generic_mask(&access
, mapping
);
836 if (desired_access
& MAXIMUM_ALLOWED
)
837 current_access
|= access
;
839 current_access
|= (access
& ~denied_access
);
844 /* don't bother carrying on checking if we've already got all of
846 if (desired_access
== *granted_access
)
849 ace
= ace_next( ace
);
852 if (desired_access
& MAXIMUM_ALLOWED
)
854 *granted_access
= current_access
& ~denied_access
;
856 return STATUS_SUCCESS
;
858 return STATUS_ACCESS_DENIED
;
862 if ((current_access
& desired_access
) == desired_access
)
864 *granted_access
= current_access
& desired_access
;
865 return STATUS_SUCCESS
;
868 return STATUS_ACCESS_DENIED
;
872 const ACL
*token_get_default_dacl( struct token
*token
)
874 return token
->default_dacl
;
877 /* open a security token */
878 DECL_HANDLER(open_token
)
880 if (req
->flags
& OPEN_TOKEN_THREAD
)
882 struct thread
*thread
= get_thread_from_handle( req
->handle
, 0 );
886 reply
->token
= alloc_handle( current
->process
, thread
->token
, TOKEN_ALL_ACCESS
, 0);
888 set_error(STATUS_NO_TOKEN
);
889 release_object( thread
);
894 struct process
*process
= get_process_from_handle( req
->handle
, 0 );
898 reply
->token
= alloc_handle( current
->process
, process
->token
, TOKEN_ALL_ACCESS
, 0);
900 set_error(STATUS_NO_TOKEN
);
901 release_object( process
);
906 /* adjust the privileges held by a token */
907 DECL_HANDLER(adjust_token_privileges
)
910 unsigned int access
= TOKEN_ADJUST_PRIVILEGES
;
912 if (req
->get_modified_state
) access
|= TOKEN_QUERY
;
914 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
915 access
, &token_ops
)))
917 const LUID_AND_ATTRIBUTES
*privs
= get_req_data();
918 LUID_AND_ATTRIBUTES
*modified_privs
= NULL
;
919 unsigned int priv_count
= get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES
);
920 unsigned int modified_priv_count
= 0;
922 if (req
->get_modified_state
&& !req
->disable_all
)
925 /* count modified privs */
926 for (i
= 0; i
< priv_count
; i
++)
928 struct privilege
*privilege
=
929 token_find_privilege( token
, &privs
[i
].Luid
, FALSE
);
930 if (privilege
&& req
->get_modified_state
)
931 modified_priv_count
++;
933 reply
->len
= modified_priv_count
;
934 modified_priv_count
= min( modified_priv_count
, get_reply_max_size() / sizeof(*modified_privs
) );
935 if (modified_priv_count
)
936 modified_privs
= set_reply_data_size( modified_priv_count
* sizeof(*modified_privs
) );
938 reply
->len
= modified_priv_count
* sizeof(*modified_privs
);
940 if (req
->disable_all
)
941 token_disable_privileges( token
);
943 modified_priv_count
= token_adjust_privileges( token
, privs
,
944 priv_count
, modified_privs
, modified_priv_count
);
946 release_object( token
);
950 /* retrieves the list of privileges that may be held be the token */
951 DECL_HANDLER(get_token_privileges
)
955 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
960 LUID_AND_ATTRIBUTES
*privs
;
961 struct privilege
*privilege
;
963 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
966 reply
->len
= priv_count
* sizeof(*privs
);
967 if (reply
->len
<= get_reply_max_size())
969 privs
= set_reply_data_size( priv_count
* sizeof(*privs
) );
973 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
975 luid_and_attr_from_privilege( &privs
[i
], privilege
);
981 set_error(STATUS_BUFFER_TOO_SMALL
);
983 release_object( token
);
987 /* creates a duplicate of the token */
988 DECL_HANDLER(duplicate_token
)
990 struct token
*src_token
;
991 if ((src_token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
995 /* FIXME: use req->impersonation_level */
996 struct token
*token
= create_token( req
->primary
, src_token
->user
, NULL
, 0, NULL
, 0, src_token
->default_dacl
);
999 struct privilege
*privilege
;
1000 struct sid_and_attributes
*group
;
1001 unsigned int access
;
1004 LIST_FOR_EACH_ENTRY( group
, &src_token
->groups
, struct sid_and_attributes
, entry
)
1006 size_t size
= FIELD_OFFSET( struct sid_and_attributes
, sid
.SubAuthority
[group
->sid
.SubAuthorityCount
] );
1007 struct sid_and_attributes
*newgroup
= mem_alloc( size
);
1008 memcpy( newgroup
, group
, size
);
1009 list_add_tail( &token
->groups
, &newgroup
->entry
);
1012 /* copy privileges */
1013 LIST_FOR_EACH_ENTRY( privilege
, &src_token
->privileges
, struct privilege
, entry
)
1014 privilege_add( token
, &privilege
->luid
, privilege
->enabled
);
1016 access
= req
->access
;
1017 if (access
& MAXIMUM_ALLOWED
) access
= TOKEN_ALL_ACCESS
; /* FIXME: needs general solution */
1018 reply
->new_handle
= alloc_handle( current
->process
, token
, access
, req
->inherit
);
1019 release_object( token
);
1021 release_object( src_token
);
1025 /* checks the specified privileges are held by the token */
1026 DECL_HANDLER(check_token_privileges
)
1028 struct token
*token
;
1030 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1034 unsigned int count
= get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES
);
1035 if (get_reply_max_size() >= count
* sizeof(LUID_AND_ATTRIBUTES
))
1037 LUID_AND_ATTRIBUTES
*usedprivs
= set_reply_data_size( count
* sizeof(*usedprivs
) );
1038 reply
->has_privileges
= token_check_privileges( token
, req
->all_required
, get_req_data(), count
, usedprivs
);
1041 set_error( STATUS_BUFFER_OVERFLOW
);
1042 release_object( token
);
1046 /* checks that a user represented by a token is allowed to access an object
1047 * represented by a security descriptor */
1048 DECL_HANDLER(access_check
)
1050 size_t sd_size
= get_req_data_size();
1051 const struct security_descriptor
*sd
= get_req_data();
1052 struct token
*token
;
1054 if (!sd_is_valid( sd
, sd_size
))
1056 set_error( STATUS_ACCESS_VIOLATION
);
1060 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1064 GENERIC_MAPPING mapping
;
1065 unsigned int status
;
1066 LUID_AND_ATTRIBUTES priv
;
1067 unsigned int priv_count
= 1;
1069 memset(&priv
, 0, sizeof(priv
));
1071 /* only impersonation tokens may be used with this function */
1074 set_error( STATUS_NO_IMPERSONATION_TOKEN
);
1075 release_object( token
);
1079 mapping
.GenericRead
= req
->mapping_read
;
1080 mapping
.GenericWrite
= req
->mapping_write
;
1081 mapping
.GenericExecute
= req
->mapping_execute
;
1082 mapping
.GenericAll
= req
->mapping_all
;
1084 reply
->access_status
= token_access_check(
1085 token
, sd
, req
->desired_access
, &priv
, &priv_count
, &mapping
,
1086 &reply
->access_granted
, &status
);
1088 reply
->privileges_len
= priv_count
*sizeof(LUID_AND_ATTRIBUTES
);
1090 if ((priv_count
> 0) && (reply
->privileges_len
<= get_reply_max_size()))
1092 LUID_AND_ATTRIBUTES
*privs
= set_reply_data_size( priv_count
* sizeof(*privs
) );
1093 memcpy( privs
, &priv
, sizeof(priv
) );
1096 if (status
!= STATUS_SUCCESS
)
1097 set_error( status
);
1099 release_object( token
);
1104 DECL_HANDLER(get_token_user
)
1106 struct token
*token
;
1108 reply
->user_len
= 0;
1110 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1114 const SID
*user
= token
->user
;
1116 reply
->user_len
= FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]);
1117 if (reply
->user_len
<= get_reply_max_size())
1119 SID
*user_reply
= set_reply_data_size( reply
->user_len
);
1121 memcpy( user_reply
, user
, reply
->user_len
);
1123 else set_error( STATUS_BUFFER_TOO_SMALL
);
1125 release_object( token
);