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
37 #define MAX_SUBAUTH_COUNT 1
39 const LUID SeIncreaseQuotaPrivilege
= { 5, 0 };
40 const LUID SeSecurityPrivilege
= { 8, 0 };
41 const LUID SeTakeOwnershipPrivilege
= { 9, 0 };
42 const LUID SeLoadDriverPrivilege
= { 10, 0 };
43 const LUID SeSystemProfilePrivilege
= { 11, 0 };
44 const LUID SeSystemtimePrivilege
= { 12, 0 };
45 const LUID SeProfileSingleProcessPrivilege
= { 13, 0 };
46 const LUID SeIncreaseBasePriorityPrivilege
= { 14, 0 };
47 const LUID SeCreatePagefilePrivilege
= { 15, 0 };
48 const LUID SeBackupPrivilege
= { 17, 0 };
49 const LUID SeRestorePrivilege
= { 18, 0 };
50 const LUID SeShutdownPrivilege
= { 19, 0 };
51 const LUID SeDebugPrivilege
= { 20, 0 };
52 const LUID SeSystemEnvironmentPrivilege
= { 22, 0 };
53 const LUID SeChangeNotifyPrivilege
= { 23, 0 };
54 const LUID SeRemoteShutdownPrivilege
= { 24, 0 };
55 const LUID SeUndockPrivilege
= { 25, 0 };
56 const LUID SeManageVolumePrivilege
= { 28, 0 };
57 const LUID SeImpersonatePrivilege
= { 29, 0 };
58 const LUID SeCreateGlobalPrivilege
= { 30, 0 };
60 static const SID world_sid
= { SID_REVISION
, 1, { SECURITY_WORLD_SID_AUTHORITY
}, { SECURITY_WORLD_RID
} };
61 static const SID local_sid
= { SID_REVISION
, 1, { SECURITY_LOCAL_SID_AUTHORITY
}, { SECURITY_LOCAL_RID
} };
62 static const SID interactive_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_INTERACTIVE_RID
} };
63 static const SID authenticated_user_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_AUTHENTICATED_USER_RID
} };
64 static const SID local_system_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_LOCAL_SYSTEM_RID
} };
65 static PSID security_world_sid
= (PSID
)&world_sid
;
66 static PSID security_local_sid
= (PSID
)&local_sid
;
67 static PSID security_interactive_sid
= (PSID
)&interactive_sid
;
68 static PSID security_authenticated_user_sid
= (PSID
)&authenticated_user_sid
;
72 struct object obj
; /* object header */
73 struct list privileges
; /* privileges available to the token */
74 struct list groups
; /* groups that the user of this token belongs to (sid_and_attributes) */
75 SID
*user
; /* SID of user this token represents */
76 unsigned primary
; /* is this a primary or impersonation token? */
83 unsigned enabled
: 1; /* is the privilege currently enabled? */
84 unsigned def
: 1; /* is the privilege enabled by default? */
87 struct sid_and_attributes
90 unsigned enabled
: 1; /* is the sid currently enabled? */
91 unsigned def
: 1; /* is the sid enabled by default? */
92 unsigned logon
: 1; /* is this a logon sid? */
93 unsigned mandatory
: 1; /* is this sid always enabled? */
94 unsigned owner
: 1; /* can this sid be an owner of an object? */
95 unsigned resource
: 1; /* is this a domain-local group? */
96 unsigned deny_only
: 1; /* is this a sid that should be use for denying only? */
100 static void token_dump( struct object
*obj
, int verbose
);
101 static void token_destroy( struct object
*obj
);
103 static const struct object_ops token_ops
=
105 sizeof(struct token
), /* size */
106 token_dump
, /* dump */
107 no_add_queue
, /* add_queue */
108 NULL
, /* remove_queue */
110 NULL
, /* satisfied */
111 no_signal
, /* signal */
112 no_get_fd
, /* get_fd */
113 no_close_handle
, /* close_handle */
114 token_destroy
/* destroy */
118 static void token_dump( struct object
*obj
, int verbose
)
120 fprintf( stderr
, "Security token\n" );
121 /* FIXME: dump token members */
124 static SID
*security_sid_alloc( const SID_IDENTIFIER_AUTHORITY
*idauthority
, int subauthcount
, const unsigned int subauth
[] )
127 SID
*sid
= mem_alloc( FIELD_OFFSET(SID
, SubAuthority
[subauthcount
]) );
128 if (!sid
) return NULL
;
129 sid
->Revision
= SID_REVISION
;
130 sid
->SubAuthorityCount
= subauthcount
;
131 sid
->IdentifierAuthority
= *idauthority
;
132 for (i
= 0; i
< subauthcount
; i
++)
133 sid
->SubAuthority
[i
] = subauth
[i
];
137 static inline int security_equal_sid( const SID
*sid1
, const SID
*sid2
)
139 return ((sid1
->SubAuthorityCount
== sid2
->SubAuthorityCount
) &&
140 !memcmp( sid1
, sid2
, FIELD_OFFSET(SID
, SubAuthority
[sid1
->SubAuthorityCount
]) ));
143 void security_set_thread_token( struct thread
*thread
, obj_handle_t handle
)
148 release_object( thread
->token
);
149 thread
->token
= NULL
;
153 struct token
*token
= (struct token
*)get_handle_obj( current
->process
,
160 release_object( thread
->token
);
161 thread
->token
= token
;
166 static const ACE_HEADER
*ace_next( const ACE_HEADER
*ace
)
168 return (const ACE_HEADER
*)((const char *)ace
+ ace
->AceSize
);
171 static int acl_is_valid( const ACL
*acl
, size_t size
)
174 const ACE_HEADER
*ace
;
176 if (size
< sizeof(ACL
))
179 size
= min(size
, MAX_ACL_LEN
);
183 ace
= (const ACE_HEADER
*)(acl
+ 1);
184 for (i
= 0; i
< acl
->AceCount
; i
++)
189 if (size
< sizeof(ACE_HEADER
))
191 if (size
< ace
->AceSize
)
193 size
-= ace
->AceSize
;
194 switch (ace
->AceType
)
196 case ACCESS_DENIED_ACE_TYPE
:
197 sid
= (const SID
*)&((const ACCESS_DENIED_ACE
*)ace
)->SidStart
;
198 sid_size
= ace
->AceSize
- FIELD_OFFSET(ACCESS_DENIED_ACE
, SidStart
);
200 case ACCESS_ALLOWED_ACE_TYPE
:
201 sid
= (const SID
*)&((const ACCESS_ALLOWED_ACE
*)ace
)->SidStart
;
202 sid_size
= ace
->AceSize
- FIELD_OFFSET(ACCESS_ALLOWED_ACE
, SidStart
);
204 case SYSTEM_AUDIT_ACE_TYPE
:
205 sid
= (const SID
*)&((const SYSTEM_AUDIT_ACE
*)ace
)->SidStart
;
206 sid_size
= ace
->AceSize
- FIELD_OFFSET(SYSTEM_AUDIT_ACE
, SidStart
);
208 case SYSTEM_ALARM_ACE_TYPE
:
209 sid
= (const SID
*)&((const SYSTEM_ALARM_ACE
*)ace
)->SidStart
;
210 sid_size
= ace
->AceSize
- FIELD_OFFSET(SYSTEM_ALARM_ACE
, SidStart
);
215 if (sid_size
< FIELD_OFFSET(SID
, SubAuthority
[0]) ||
216 sid_size
< FIELD_OFFSET(SID
, SubAuthority
[sid
->SubAuthorityCount
]))
218 ace
= ace_next( ace
);
223 /* gets the discretionary access control list from a security descriptor */
224 static inline const ACL
*sd_get_dacl( const struct security_descriptor
*sd
, int *present
)
226 *present
= (sd
->control
& SE_DACL_PRESENT
? TRUE
: FALSE
);
229 return (const ACL
*)((const char *)(sd
+ 1) +
230 sd
->owner_len
+ sd
->group_len
+ sd
->sacl_len
);
235 /* gets the system access control list from a security descriptor */
236 static inline const ACL
*sd_get_sacl( const struct security_descriptor
*sd
, int *present
)
238 *present
= (sd
->control
& SE_SACL_PRESENT
? TRUE
: FALSE
);
241 return (const ACL
*)((const char *)(sd
+ 1) +
242 sd
->owner_len
+ sd
->group_len
);
247 /* gets the owner from a security descriptor */
248 static inline const SID
*sd_get_owner( const struct security_descriptor
*sd
)
251 return (const SID
*)(sd
+ 1);
256 /* gets the primary group from a security descriptor */
257 static inline const SID
*sd_get_group( const struct security_descriptor
*sd
)
260 return (const SID
*)((const char *)(sd
+ 1) + sd
->owner_len
);
265 /* checks whether all members of a security descriptor fit inside the size
266 * of memory specified */
267 static int sd_is_valid( const struct security_descriptor
*sd
, size_t size
)
269 size_t offset
= sizeof(struct security_descriptor
);
279 if ((sd
->owner_len
>= FIELD_OFFSET(SID
, SubAuthority
[255])) ||
280 (offset
+ sd
->owner_len
> size
))
282 owner
= sd_get_owner( sd
);
285 size_t needed_size
= FIELD_OFFSET(SID
, SubAuthority
[owner
->SubAuthorityCount
]);
286 if ((sd
->owner_len
< sizeof(SID
)) || (needed_size
> sd
->owner_len
))
289 offset
+= sd
->owner_len
;
291 if ((sd
->group_len
>= FIELD_OFFSET(SID
, SubAuthority
[255])) ||
292 (offset
+ sd
->group_len
> size
))
294 group
= sd_get_group( sd
);
297 size_t needed_size
= FIELD_OFFSET(SID
, SubAuthority
[group
->SubAuthorityCount
]);
298 if ((sd
->owner_len
< sizeof(SID
)) || (needed_size
> sd
->owner_len
))
301 offset
+= sd
->group_len
;
303 if ((sd
->sacl_len
>= MAX_ACL_LEN
) || (offset
+ sd
->sacl_len
> size
))
305 sacl
= sd_get_sacl( sd
, &dummy
);
306 if (sacl
&& !acl_is_valid( sacl
, sd
->sacl_len
))
308 offset
+= sd
->sacl_len
;
310 if ((sd
->dacl_len
>= MAX_ACL_LEN
) || (offset
+ sd
->dacl_len
> size
))
312 dacl
= sd_get_dacl( sd
, &dummy
);
313 if (dacl
&& !acl_is_valid( dacl
, sd
->dacl_len
))
315 offset
+= sd
->dacl_len
;
320 /* maps from generic rights to specific rights as given by a mapping */
321 static inline void map_generic_mask(unsigned int *mask
, const GENERIC_MAPPING
*mapping
)
323 if (*mask
& GENERIC_READ
) *mask
|= mapping
->GenericRead
;
324 if (*mask
& GENERIC_WRITE
) *mask
|= mapping
->GenericWrite
;
325 if (*mask
& GENERIC_EXECUTE
) *mask
|= mapping
->GenericExecute
;
326 if (*mask
& GENERIC_ALL
) *mask
|= mapping
->GenericAll
;
330 static inline int is_equal_luid( const LUID
*luid1
, const LUID
*luid2
)
332 return (luid1
->LowPart
== luid2
->LowPart
&& luid1
->HighPart
== luid2
->HighPart
);
335 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES
*out
, const struct privilege
*in
)
337 out
->Luid
= in
->luid
;
339 (in
->enabled
? SE_PRIVILEGE_ENABLED
: 0) |
340 (in
->def
? SE_PRIVILEGE_ENABLED_BY_DEFAULT
: 0);
343 static struct privilege
*privilege_add( struct token
*token
, const LUID
*luid
, int enabled
)
345 struct privilege
*privilege
= mem_alloc( sizeof(*privilege
) );
348 privilege
->luid
= *luid
;
349 privilege
->def
= privilege
->enabled
= (enabled
!= 0);
350 list_add_tail( &token
->privileges
, &privilege
->entry
);
355 static inline void privilege_remove( struct privilege
*privilege
)
357 list_remove( &privilege
->entry
);
361 static void token_destroy( struct object
*obj
)
364 struct list
*cursor
, *cursor_next
;
366 assert( obj
->ops
== &token_ops
);
367 token
= (struct token
*)obj
;
371 LIST_FOR_EACH_SAFE( cursor
, cursor_next
, &token
->privileges
)
373 struct privilege
*privilege
= LIST_ENTRY( cursor
, struct privilege
, entry
);
374 privilege_remove( privilege
);
377 LIST_FOR_EACH_SAFE( cursor
, cursor_next
, &token
->groups
)
379 struct sid_and_attributes
*group
= LIST_ENTRY( cursor
, struct sid_and_attributes
, entry
);
380 list_remove( &group
->entry
);
385 static struct token
*create_token( unsigned primary
, const SID
*user
,
386 const SID_AND_ATTRIBUTES
*groups
, unsigned int group_count
,
387 const LUID_AND_ATTRIBUTES
*privs
, unsigned int priv_count
)
389 struct token
*token
= alloc_object( &token_ops
);
394 list_init( &token
->privileges
);
395 list_init( &token
->groups
);
396 token
->primary
= primary
;
399 token
->user
= memdup( user
, FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]) );
402 release_object( token
);
407 for (i
= 0; i
< group_count
; i
++)
409 size_t size
= FIELD_OFFSET( struct sid_and_attributes
, sid
.SubAuthority
[((const SID
*)groups
[i
].Sid
)->SubAuthorityCount
] );
410 struct sid_and_attributes
*group
= mem_alloc( size
);
411 memcpy( &group
->sid
, groups
[i
].Sid
, FIELD_OFFSET( SID
, SubAuthority
[((const SID
*)groups
[i
].Sid
)->SubAuthorityCount
] ) );
412 group
->enabled
= TRUE
;
414 group
->logon
= FALSE
;
415 group
->mandatory
= (groups
[i
].Attributes
& SE_GROUP_MANDATORY
) ? TRUE
: FALSE
;
416 group
->owner
= FALSE
;
417 group
->resource
= FALSE
;
418 group
->deny_only
= FALSE
;
419 list_add_tail( &token
->groups
, &group
->entry
);
422 /* copy privileges */
423 for (i
= 0; i
< priv_count
; i
++)
425 /* note: we don't check uniqueness: the caller must make sure
426 * privs doesn't contain any duplicate luids */
427 if (!privilege_add( token
, &privs
[i
].Luid
,
428 privs
[i
].Attributes
& SE_PRIVILEGE_ENABLED
))
430 release_object( token
);
440 SID_IDENTIFIER_AUTHORITY idauth
;
442 unsigned int subauth
[MAX_SUBAUTH_COUNT
];
445 struct token
*token_create_admin( void )
447 struct token
*token
= NULL
;
448 static const SID_IDENTIFIER_AUTHORITY nt_authority
= { SECURITY_NT_AUTHORITY
};
449 static const unsigned int alias_admins_subauth
[] = { SECURITY_BUILTIN_DOMAIN_RID
, DOMAIN_ALIAS_RID_ADMINS
};
450 static const unsigned int alias_users_subauth
[] = { SECURITY_BUILTIN_DOMAIN_RID
, DOMAIN_ALIAS_RID_USERS
};
451 PSID alias_admins_sid
;
452 PSID alias_users_sid
;
454 alias_admins_sid
= security_sid_alloc( &nt_authority
, sizeof(alias_admins_subauth
)/sizeof(alias_admins_subauth
[0]),
455 alias_admins_subauth
);
456 alias_users_sid
= security_sid_alloc( &nt_authority
, sizeof(alias_users_subauth
)/sizeof(alias_users_subauth
[0]),
457 alias_users_subauth
);
459 if (alias_admins_sid
&& alias_users_sid
)
461 const LUID_AND_ATTRIBUTES admin_privs
[] =
463 { SeChangeNotifyPrivilege
, SE_PRIVILEGE_ENABLED
},
464 { SeSecurityPrivilege
, 0 },
465 { SeBackupPrivilege
, 0 },
466 { SeRestorePrivilege
, 0 },
467 { SeSystemtimePrivilege
, 0 },
468 { SeShutdownPrivilege
, 0 },
469 { SeRemoteShutdownPrivilege
, 0 },
470 { SeTakeOwnershipPrivilege
, 0 },
471 { SeDebugPrivilege
, 0 },
472 { SeSystemEnvironmentPrivilege
, 0 },
473 { SeSystemProfilePrivilege
, 0 },
474 { SeProfileSingleProcessPrivilege
, 0 },
475 { SeIncreaseBasePriorityPrivilege
, 0 },
476 { SeLoadDriverPrivilege
, 0 },
477 { SeCreatePagefilePrivilege
, 0 },
478 { SeIncreaseQuotaPrivilege
, 0 },
479 { SeUndockPrivilege
, 0 },
480 { SeManageVolumePrivilege
, 0 },
481 { SeImpersonatePrivilege
, SE_PRIVILEGE_ENABLED
},
482 { SeCreateGlobalPrivilege
, SE_PRIVILEGE_ENABLED
},
484 /* note: we don't include non-builtin groups here for the user -
485 * telling us these is the job of a client-side program */
486 const SID_AND_ATTRIBUTES admin_groups
[] =
488 { security_world_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
489 { security_local_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
490 { security_interactive_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
491 { security_authenticated_user_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
492 { alias_admins_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
493 { alias_users_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
495 /* note: we just set the user sid to be the local system builtin sid -
496 * telling us what this should be is the job of a client-side program */
497 token
= create_token( TRUE
, &local_system_sid
,
498 admin_groups
, sizeof(admin_groups
)/sizeof(admin_groups
[0]),
499 admin_privs
, sizeof(admin_privs
)/sizeof(admin_privs
[0]) );
502 if (alias_admins_sid
)
503 free( alias_admins_sid
);
505 free( alias_users_sid
);
510 static struct privilege
*token_find_privilege( struct token
*token
, const LUID
*luid
, int enabled_only
)
512 struct privilege
*privilege
;
513 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
515 if (is_equal_luid( luid
, &privilege
->luid
))
517 if (enabled_only
&& !privilege
->enabled
)
525 static unsigned int token_adjust_privileges( struct token
*token
, const LUID_AND_ATTRIBUTES
*privs
,
526 unsigned int count
, LUID_AND_ATTRIBUTES
*mod_privs
,
527 unsigned int mod_privs_count
)
530 unsigned int modified_count
= 0;
532 for (i
= 0; i
< count
; i
++)
534 struct privilege
*privilege
=
535 token_find_privilege( token
, &privs
[i
].Luid
, FALSE
);
538 set_error( STATUS_NOT_ALL_ASSIGNED
);
542 if (privs
[i
].Attributes
& SE_PRIVILEGE_REMOVE
)
543 privilege_remove( privilege
);
546 /* save previous state for caller */
549 luid_and_attr_from_privilege(mod_privs
, privilege
);
555 if (privs
[i
].Attributes
& SE_PRIVILEGE_ENABLED
)
556 privilege
->enabled
= TRUE
;
558 privilege
->enabled
= FALSE
;
561 return modified_count
;
564 static void token_disable_privileges( struct token
*token
)
566 struct privilege
*privilege
;
567 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
568 privilege
->enabled
= FALSE
;
571 int token_check_privileges( struct token
*token
, int all_required
,
572 const LUID_AND_ATTRIBUTES
*reqprivs
,
573 unsigned int count
, LUID_AND_ATTRIBUTES
*usedprivs
)
576 unsigned int enabled_count
= 0;
578 for (i
= 0; i
< count
; i
++)
580 struct privilege
*privilege
=
581 token_find_privilege( token
, &reqprivs
[i
].Luid
, TRUE
);
584 usedprivs
[i
] = reqprivs
[i
];
586 if (privilege
&& privilege
->enabled
)
590 usedprivs
[i
].Attributes
|= SE_PRIVILEGE_USED_FOR_ACCESS
;
595 return (enabled_count
== count
);
597 return (enabled_count
> 0);
600 static int token_sid_present( struct token
*token
, const SID
*sid
, int deny
)
602 struct sid_and_attributes
*group
;
604 if (security_equal_sid( token
->user
, sid
)) return TRUE
;
606 LIST_FOR_EACH_ENTRY( group
, &token
->groups
, struct sid_and_attributes
, entry
)
608 if (!group
->enabled
) continue;
609 if (group
->deny_only
&& !deny
) continue;
611 if (security_equal_sid( &group
->sid
, sid
)) return TRUE
;
617 /* checks access to a security descriptor. sd must have been validated by caller.
618 * it returns STATUS_SUCCESS if access was granted to the object, or an error
619 * status code if not, giving the reason. errors not relating to giving access
620 * to the object are returned in the status parameter. granted_access and
621 * status always have a valid value stored in them on return. */
622 static unsigned int token_access_check( struct token
*token
,
623 const struct security_descriptor
*sd
,
624 unsigned int desired_access
,
625 LUID_AND_ATTRIBUTES
*privs
,
626 unsigned int *priv_count
,
627 const GENERIC_MAPPING
*mapping
,
628 unsigned int *granted_access
,
629 unsigned int *status
)
631 unsigned int current_access
= 0;
632 unsigned int denied_access
= 0;
636 const ACE_HEADER
*ace
;
639 /* assume success, but no access rights */
640 *status
= STATUS_SUCCESS
;
643 /* fail if desired_access contains generic rights */
644 if (desired_access
& (GENERIC_READ
|GENERIC_WRITE
|GENERIC_EXECUTE
|GENERIC_ALL
))
647 *status
= STATUS_GENERIC_NOT_MAPPED
;
648 return STATUS_ACCESS_DENIED
;
651 dacl
= sd_get_dacl( sd
, &dacl_present
);
652 owner
= sd_get_owner( sd
);
653 if (!owner
|| !sd_get_group( sd
))
656 *status
= STATUS_INVALID_SECURITY_DESCR
;
657 return STATUS_ACCESS_DENIED
;
660 /* 1: Grant desired access if the object is unprotected */
664 *granted_access
= desired_access
;
665 return STATUS_SUCCESS
;
670 return STATUS_ACCESS_DENIED
;
673 /* 2: Check if caller wants access to system security part. Note: access
674 * is only granted if specifically asked for */
675 if (desired_access
& ACCESS_SYSTEM_SECURITY
)
677 const LUID_AND_ATTRIBUTES security_priv
= { SeSecurityPrivilege
, 0 };
678 LUID_AND_ATTRIBUTES retpriv
= security_priv
;
679 if (token_check_privileges( token
, TRUE
, &security_priv
, 1, &retpriv
))
683 /* assumes that there will only be one privilege to return */
684 if (*priv_count
>= 1)
692 return STATUS_BUFFER_TOO_SMALL
;
695 current_access
|= ACCESS_SYSTEM_SECURITY
;
696 if (desired_access
== current_access
)
698 *granted_access
= current_access
;
699 return STATUS_SUCCESS
;
705 return STATUS_PRIVILEGE_NOT_HELD
;
708 else if (priv_count
) *priv_count
= 0;
710 /* 3: Check whether the token is the owner */
711 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
712 * checked when a "set owner" call is made, overriding the access rights
713 * determined here. */
714 if (token_sid_present( token
, owner
, FALSE
))
716 current_access
|= (READ_CONTROL
| WRITE_DAC
);
717 if (desired_access
== current_access
)
719 *granted_access
= current_access
;
720 return STATUS_SUCCESS
;
724 /* 4: Grant rights according to the DACL */
725 ace
= (const ACE_HEADER
*)(dacl
+ 1);
726 for (i
= 0; i
< dacl
->AceCount
; i
++)
728 const ACCESS_ALLOWED_ACE
*aa_ace
;
729 const ACCESS_DENIED_ACE
*ad_ace
;
731 switch (ace
->AceType
)
733 case ACCESS_DENIED_ACE_TYPE
:
734 ad_ace
= (const ACCESS_DENIED_ACE
*)ace
;
735 sid
= (const SID
*)&ad_ace
->SidStart
;
736 if (token_sid_present( token
, sid
, TRUE
))
738 unsigned int access
= ad_ace
->Mask
;
739 map_generic_mask(&access
, mapping
);
740 if (desired_access
& MAXIMUM_ALLOWED
)
741 denied_access
|= access
;
744 denied_access
|= (access
& ~current_access
);
745 if (desired_access
& access
)
748 return STATUS_SUCCESS
;
753 case ACCESS_ALLOWED_ACE_TYPE
:
754 aa_ace
= (const ACCESS_ALLOWED_ACE
*)ace
;
755 sid
= (const SID
*)&aa_ace
->SidStart
;
756 if (token_sid_present( token
, sid
, FALSE
))
758 unsigned int access
= aa_ace
->Mask
;
759 map_generic_mask(&access
, mapping
);
760 if (desired_access
& MAXIMUM_ALLOWED
)
761 current_access
|= access
;
763 current_access
|= (access
& ~denied_access
);
768 /* don't bother carrying on checking if we've already got all of
770 if (desired_access
== *granted_access
)
773 ace
= ace_next( ace
);
776 if (desired_access
& MAXIMUM_ALLOWED
)
778 *granted_access
= current_access
& ~denied_access
;
780 return STATUS_SUCCESS
;
782 return STATUS_ACCESS_DENIED
;
786 if ((current_access
& desired_access
) == desired_access
)
788 *granted_access
= current_access
& desired_access
;
789 return STATUS_SUCCESS
;
792 return STATUS_ACCESS_DENIED
;
796 /* open a security token */
797 DECL_HANDLER(open_token
)
799 if (req
->flags
& OPEN_TOKEN_THREAD
)
801 struct thread
*thread
= get_thread_from_handle( req
->handle
, 0 );
805 reply
->token
= alloc_handle( current
->process
, thread
->token
, TOKEN_ALL_ACCESS
, 0);
807 set_error(STATUS_NO_TOKEN
);
808 release_object( thread
);
813 struct process
*process
= get_process_from_handle( req
->handle
, 0 );
817 reply
->token
= alloc_handle( current
->process
, process
->token
, TOKEN_ALL_ACCESS
, 0);
819 set_error(STATUS_NO_TOKEN
);
820 release_object( process
);
825 /* adjust the privileges held by a token */
826 DECL_HANDLER(adjust_token_privileges
)
829 unsigned int access
= TOKEN_ADJUST_PRIVILEGES
;
831 if (req
->get_modified_state
) access
|= TOKEN_QUERY
;
833 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
834 access
, &token_ops
)))
836 const LUID_AND_ATTRIBUTES
*privs
= get_req_data();
837 LUID_AND_ATTRIBUTES
*modified_privs
= NULL
;
838 unsigned int priv_count
= get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES
);
839 unsigned int modified_priv_count
= 0;
841 if (req
->get_modified_state
&& !req
->disable_all
)
844 /* count modified privs */
845 for (i
= 0; i
< priv_count
; i
++)
847 struct privilege
*privilege
=
848 token_find_privilege( token
, &privs
[i
].Luid
, FALSE
);
849 if (privilege
&& req
->get_modified_state
)
850 modified_priv_count
++;
852 reply
->len
= modified_priv_count
;
853 modified_priv_count
= min( modified_priv_count
, get_reply_max_size() / sizeof(*modified_privs
) );
854 if (modified_priv_count
)
855 modified_privs
= set_reply_data_size( modified_priv_count
* sizeof(*modified_privs
) );
857 reply
->len
= modified_priv_count
* sizeof(*modified_privs
);
859 if (req
->disable_all
)
860 token_disable_privileges( token
);
862 modified_priv_count
= token_adjust_privileges( token
, privs
,
863 priv_count
, modified_privs
, modified_priv_count
);
865 release_object( token
);
869 /* retrieves the list of privileges that may be held be the token */
870 DECL_HANDLER(get_token_privileges
)
874 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
879 LUID_AND_ATTRIBUTES
*privs
;
880 struct privilege
*privilege
;
882 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
885 reply
->len
= priv_count
* sizeof(*privs
);
886 if (reply
->len
<= get_reply_max_size())
888 privs
= set_reply_data_size( priv_count
* sizeof(*privs
) );
892 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
894 luid_and_attr_from_privilege( &privs
[i
], privilege
);
900 set_error(STATUS_BUFFER_TOO_SMALL
);
902 release_object( token
);
906 /* creates a duplicate of the token */
907 DECL_HANDLER(duplicate_token
)
909 struct token
*src_token
;
910 if ((src_token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
914 /* FIXME: use req->impersonation_level */
915 struct token
*token
= create_token( req
->primary
, src_token
->user
, NULL
, 0, NULL
, 0 );
918 struct privilege
*privilege
;
919 struct sid_and_attributes
*group
;
923 LIST_FOR_EACH_ENTRY( group
, &src_token
->groups
, struct sid_and_attributes
, entry
)
925 size_t size
= FIELD_OFFSET( struct sid_and_attributes
, sid
.SubAuthority
[group
->sid
.SubAuthorityCount
] );
926 struct sid_and_attributes
*newgroup
= mem_alloc( size
);
927 memcpy( newgroup
, group
, size
);
928 list_add_tail( &token
->groups
, &newgroup
->entry
);
931 /* copy privileges */
932 LIST_FOR_EACH_ENTRY( privilege
, &src_token
->privileges
, struct privilege
, entry
)
933 privilege_add( token
, &privilege
->luid
, privilege
->enabled
);
935 access
= req
->access
;
936 if (access
& MAXIMUM_ALLOWED
) access
= TOKEN_ALL_ACCESS
; /* FIXME: needs general solution */
937 reply
->new_handle
= alloc_handle( current
->process
, token
, access
, req
->inherit
);
938 release_object( token
);
940 release_object( src_token
);
944 /* checks the specified privileges are held by the token */
945 DECL_HANDLER(check_token_privileges
)
949 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
953 unsigned int count
= get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES
);
954 if (get_reply_max_size() >= count
* sizeof(LUID_AND_ATTRIBUTES
))
956 LUID_AND_ATTRIBUTES
*usedprivs
= set_reply_data_size( count
* sizeof(*usedprivs
) );
957 reply
->has_privileges
= token_check_privileges( token
, req
->all_required
, get_req_data(), count
, usedprivs
);
960 set_error( STATUS_BUFFER_OVERFLOW
);
961 release_object( token
);
965 /* checks that a user represented by a token is allowed to access an object
966 * represented by a security descriptor */
967 DECL_HANDLER(access_check
)
969 size_t sd_size
= get_req_data_size();
970 const struct security_descriptor
*sd
= get_req_data();
973 if (!sd_is_valid( sd
, sd_size
))
975 set_error( STATUS_ACCESS_VIOLATION
);
979 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
983 GENERIC_MAPPING mapping
;
985 LUID_AND_ATTRIBUTES priv
;
986 unsigned int priv_count
= 1;
988 memset(&priv
, 0, sizeof(priv
));
990 /* only impersonation tokens may be used with this function */
993 set_error( STATUS_NO_IMPERSONATION_TOKEN
);
994 release_object( token
);
998 mapping
.GenericRead
= req
->mapping_read
;
999 mapping
.GenericWrite
= req
->mapping_write
;
1000 mapping
.GenericExecute
= req
->mapping_execute
;
1001 mapping
.GenericAll
= req
->mapping_all
;
1003 reply
->access_status
= token_access_check(
1004 token
, sd
, req
->desired_access
, &priv
, &priv_count
, &mapping
,
1005 &reply
->access_granted
, &status
);
1007 reply
->privileges_len
= priv_count
*sizeof(LUID_AND_ATTRIBUTES
);
1009 if ((priv_count
> 0) && (reply
->privileges_len
<= get_reply_max_size()))
1011 LUID_AND_ATTRIBUTES
*privs
= set_reply_data_size( priv_count
* sizeof(*privs
) );
1012 memcpy( privs
, &priv
, sizeof(priv
) );
1015 if (status
!= STATUS_SUCCESS
)
1016 set_error( status
);
1018 release_object( token
);