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? */
77 ACL *default_dacl; /* the default DACL to assign to objects created by this user */
84 unsigned enabled : 1; /* is the privilege currently enabled? */
85 unsigned def : 1; /* is the privilege enabled by default? */
88 struct sid_and_attributes
91 unsigned enabled : 1; /* is the sid currently enabled? */
92 unsigned def : 1; /* is the sid enabled by default? */
93 unsigned logon : 1; /* is this a logon sid? */
94 unsigned mandatory: 1; /* is this sid always enabled? */
95 unsigned owner : 1; /* can this sid be an owner of an object? */
96 unsigned resource : 1; /* is this a domain-local group? */
97 unsigned deny_only: 1; /* is this a sid that should be use for denying only? */
101 static void token_dump( struct object *obj, int verbose );
102 static void token_destroy( struct object *obj );
104 static const struct object_ops token_ops =
106 sizeof(struct token), /* size */
107 token_dump, /* dump */
108 no_add_queue, /* add_queue */
109 NULL, /* remove_queue */
111 NULL, /* satisfied */
112 no_signal, /* signal */
113 no_get_fd, /* get_fd */
114 no_close_handle, /* close_handle */
115 token_destroy /* destroy */
119 static void token_dump( struct object *obj, int verbose )
121 fprintf( stderr, "Security token\n" );
122 /* FIXME: dump token members */
125 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
128 SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
129 if (!sid) return NULL;
130 sid->Revision = SID_REVISION;
131 sid->SubAuthorityCount = subauthcount;
132 sid->IdentifierAuthority = *idauthority;
133 for (i = 0; i < subauthcount; i++)
134 sid->SubAuthority[i] = subauth[i];
138 static inline int security_equal_sid( const SID *sid1, const SID *sid2 )
140 return ((sid1->SubAuthorityCount == sid2->SubAuthorityCount) &&
141 !memcmp( sid1, sid2, FIELD_OFFSET(SID, SubAuthority[sid1->SubAuthorityCount]) ));
144 void security_set_thread_token( struct thread *thread, obj_handle_t handle )
149 release_object( thread->token );
150 thread->token = NULL;
154 struct token *token = (struct token *)get_handle_obj( current->process,
161 release_object( thread->token );
162 thread->token = token;
167 static const ACE_HEADER *ace_next( const ACE_HEADER *ace )
169 return (const ACE_HEADER *)((const char *)ace + ace->AceSize);
172 static int acl_is_valid( const ACL *acl, size_t size )
175 const ACE_HEADER *ace;
177 if (size < sizeof(ACL))
180 size = min(size, MAX_ACL_LEN);
184 ace = (const ACE_HEADER *)(acl + 1);
185 for (i = 0; i < acl->AceCount; i++)
190 if (size < sizeof(ACE_HEADER))
192 if (size < ace->AceSize)
194 size -= ace->AceSize;
195 switch (ace->AceType)
197 case ACCESS_DENIED_ACE_TYPE:
198 sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
199 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
201 case ACCESS_ALLOWED_ACE_TYPE:
202 sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
203 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
205 case SYSTEM_AUDIT_ACE_TYPE:
206 sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
207 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
209 case SYSTEM_ALARM_ACE_TYPE:
210 sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
211 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
216 if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
217 sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
219 ace = ace_next( ace );
224 /* gets the discretionary access control list from a security descriptor */
225 static inline const ACL *sd_get_dacl( const struct security_descriptor *sd, int *present )
227 *present = (sd->control & SE_DACL_PRESENT ? TRUE : FALSE);
230 return (const ACL *)((const char *)(sd + 1) +
231 sd->owner_len + sd->group_len + sd->sacl_len);
236 /* gets the system access control list from a security descriptor */
237 static inline const ACL *sd_get_sacl( const struct security_descriptor *sd, int *present )
239 *present = (sd->control & SE_SACL_PRESENT ? TRUE : FALSE);
242 return (const ACL *)((const char *)(sd + 1) +
243 sd->owner_len + sd->group_len);
248 /* gets the owner from a security descriptor */
249 static inline const SID *sd_get_owner( const struct security_descriptor *sd )
252 return (const SID *)(sd + 1);
257 /* gets the primary group from a security descriptor */
258 static inline const SID *sd_get_group( const struct security_descriptor *sd )
261 return (const SID *)((const char *)(sd + 1) + sd->owner_len);
266 /* checks whether all members of a security descriptor fit inside the size
267 * of memory specified */
268 static int sd_is_valid( const struct security_descriptor *sd, size_t size )
270 size_t offset = sizeof(struct security_descriptor);
280 if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
281 (offset + sd->owner_len > size))
283 owner = sd_get_owner( sd );
286 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
287 if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
290 offset += sd->owner_len;
292 if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
293 (offset + sd->group_len > size))
295 group = sd_get_group( sd );
298 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
299 if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
302 offset += sd->group_len;
304 if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
306 sacl = sd_get_sacl( sd, &dummy );
307 if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
309 offset += sd->sacl_len;
311 if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
313 dacl = sd_get_dacl( sd, &dummy );
314 if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
316 offset += sd->dacl_len;
321 /* maps from generic rights to specific rights as given by a mapping */
322 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
324 if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
325 if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
326 if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
327 if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
331 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
333 return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
336 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
338 out->Luid = in->luid;
340 (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
341 (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
344 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
346 struct privilege *privilege = mem_alloc( sizeof(*privilege) );
349 privilege->luid = *luid;
350 privilege->def = privilege->enabled = (enabled != 0);
351 list_add_tail( &token->privileges, &privilege->entry );
356 static inline void privilege_remove( struct privilege *privilege )
358 list_remove( &privilege->entry );
362 static void token_destroy( struct object *obj )
365 struct list *cursor, *cursor_next;
367 assert( obj->ops == &token_ops );
368 token = (struct token *)obj;
372 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
374 struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
375 privilege_remove( privilege );
378 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
380 struct sid_and_attributes *group = LIST_ENTRY( cursor, struct sid_and_attributes, entry );
381 list_remove( &group->entry );
385 free( token->default_dacl );
388 /* creates a new token.
389 * groups may be NULL if group_count is 0.
390 * privs may be NULL if priv_count is 0.
391 * default_dacl may be NULL, indicating that all objects created by the user
394 static struct token *create_token( unsigned primary, const SID *user,
395 const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
396 const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
397 const ACL *default_dacl )
399 struct token *token = alloc_object( &token_ops );
404 list_init( &token->privileges );
405 list_init( &token->groups );
406 token->primary = primary;
409 token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
412 release_object( token );
417 for (i = 0; i < group_count; i++)
419 size_t size = FIELD_OFFSET( struct sid_and_attributes, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
420 struct sid_and_attributes *group = mem_alloc( size );
421 memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
422 group->enabled = TRUE;
424 group->logon = FALSE;
425 group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
426 group->owner = FALSE;
427 group->resource = FALSE;
428 group->deny_only = FALSE;
429 list_add_tail( &token->groups, &group->entry );
432 /* copy privileges */
433 for (i = 0; i < priv_count; i++)
435 /* note: we don't check uniqueness: the caller must make sure
436 * privs doesn't contain any duplicate luids */
437 if (!privilege_add( token, &privs[i].Luid,
438 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
440 release_object( token );
447 token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
448 if (!token->default_dacl)
450 release_object( token );
455 token->default_dacl = NULL;
460 static ACL *create_default_dacl( const SID *user )
462 ACCESS_ALLOWED_ACE *aaa;
465 size_t default_dacl_size = sizeof(ACL) +
466 2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
467 sizeof(local_system_sid) +
468 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
470 default_dacl = mem_alloc( default_dacl_size );
471 if (!default_dacl) return NULL;
473 default_dacl->AclRevision = MAX_ACL_REVISION;
474 default_dacl->Sbz1 = 0;
475 default_dacl->AclSize = default_dacl_size;
476 default_dacl->AceCount = 2;
477 default_dacl->Sbz2 = 0;
479 /* GENERIC_ALL for Local System */
480 aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
481 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
482 aaa->Header.AceFlags = 0;
483 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
484 sizeof(local_system_sid);
485 aaa->Mask = GENERIC_ALL;
486 sid = (SID *)&aaa->SidStart;
487 memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
489 /* GENERIC_ALL for specified user */
490 aaa = (ACCESS_ALLOWED_ACE *)((const char *)aaa + aaa->Header.AceSize);
491 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
492 aaa->Header.AceFlags = 0;
493 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
494 FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
495 aaa->Mask = GENERIC_ALL;
496 sid = (SID *)&aaa->SidStart;
497 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
504 SID_IDENTIFIER_AUTHORITY idauth;
506 unsigned int subauth[MAX_SUBAUTH_COUNT];
509 struct token *token_create_admin( void )
511 struct token *token = NULL;
512 static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
513 static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
514 static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
515 PSID alias_admins_sid;
516 PSID alias_users_sid;
517 ACL *default_dacl = create_default_dacl( &local_system_sid );
519 alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
520 alias_admins_subauth );
521 alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
522 alias_users_subauth );
524 if (alias_admins_sid && alias_users_sid && default_dacl)
526 const LUID_AND_ATTRIBUTES admin_privs[] =
528 { SeChangeNotifyPrivilege , SE_PRIVILEGE_ENABLED },
529 { SeSecurityPrivilege , 0 },
530 { SeBackupPrivilege , 0 },
531 { SeRestorePrivilege , 0 },
532 { SeSystemtimePrivilege , 0 },
533 { SeShutdownPrivilege , 0 },
534 { SeRemoteShutdownPrivilege , 0 },
535 { SeTakeOwnershipPrivilege , 0 },
536 { SeDebugPrivilege , 0 },
537 { SeSystemEnvironmentPrivilege , 0 },
538 { SeSystemProfilePrivilege , 0 },
539 { SeProfileSingleProcessPrivilege, 0 },
540 { SeIncreaseBasePriorityPrivilege, 0 },
541 { SeLoadDriverPrivilege , 0 },
542 { SeCreatePagefilePrivilege , 0 },
543 { SeIncreaseQuotaPrivilege , 0 },
544 { SeUndockPrivilege , 0 },
545 { SeManageVolumePrivilege , 0 },
546 { SeImpersonatePrivilege , SE_PRIVILEGE_ENABLED },
547 { SeCreateGlobalPrivilege , SE_PRIVILEGE_ENABLED },
549 /* note: we don't include non-builtin groups here for the user -
550 * telling us these is the job of a client-side program */
551 const SID_AND_ATTRIBUTES admin_groups[] =
553 { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
554 { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
555 { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
556 { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
557 { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
558 { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
560 /* note: we just set the user sid to be the local system builtin sid -
561 * telling us what this should be is the job of a client-side program */
562 token = create_token( TRUE, &local_system_sid,
563 admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
564 admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
568 if (alias_admins_sid)
569 free( alias_admins_sid );
571 free( alias_users_sid );
573 free( default_dacl );
578 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
580 struct privilege *privilege;
581 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
583 if (is_equal_luid( luid, &privilege->luid ))
585 if (enabled_only && !privilege->enabled)
593 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
594 unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
595 unsigned int mod_privs_count )
598 unsigned int modified_count = 0;
600 for (i = 0; i < count; i++)
602 struct privilege *privilege =
603 token_find_privilege( token, &privs[i].Luid, FALSE );
606 set_error( STATUS_NOT_ALL_ASSIGNED );
610 if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
611 privilege_remove( privilege );
614 /* save previous state for caller */
617 luid_and_attr_from_privilege(mod_privs, privilege);
623 if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
624 privilege->enabled = TRUE;
626 privilege->enabled = FALSE;
629 return modified_count;
632 static void token_disable_privileges( struct token *token )
634 struct privilege *privilege;
635 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
636 privilege->enabled = FALSE;
639 int token_check_privileges( struct token *token, int all_required,
640 const LUID_AND_ATTRIBUTES *reqprivs,
641 unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
644 unsigned int enabled_count = 0;
646 for (i = 0; i < count; i++)
648 struct privilege *privilege =
649 token_find_privilege( token, &reqprivs[i].Luid, TRUE );
652 usedprivs[i] = reqprivs[i];
654 if (privilege && privilege->enabled)
658 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
663 return (enabled_count == count);
665 return (enabled_count > 0);
668 static int token_sid_present( struct token *token, const SID *sid, int deny )
670 struct sid_and_attributes *group;
672 if (security_equal_sid( token->user, sid )) return TRUE;
674 LIST_FOR_EACH_ENTRY( group, &token->groups, struct sid_and_attributes, entry )
676 if (!group->enabled) continue;
677 if (group->deny_only && !deny) continue;
679 if (security_equal_sid( &group->sid, sid )) return TRUE;
685 /* checks access to a security descriptor. sd must have been validated by caller.
686 * it returns STATUS_SUCCESS if access was granted to the object, or an error
687 * status code if not, giving the reason. errors not relating to giving access
688 * to the object are returned in the status parameter. granted_access and
689 * status always have a valid value stored in them on return. */
690 static unsigned int token_access_check( struct token *token,
691 const struct security_descriptor *sd,
692 unsigned int desired_access,
693 LUID_AND_ATTRIBUTES *privs,
694 unsigned int *priv_count,
695 const GENERIC_MAPPING *mapping,
696 unsigned int *granted_access,
697 unsigned int *status )
699 unsigned int current_access = 0;
700 unsigned int denied_access = 0;
704 const ACE_HEADER *ace;
707 /* assume success, but no access rights */
708 *status = STATUS_SUCCESS;
711 /* fail if desired_access contains generic rights */
712 if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
715 *status = STATUS_GENERIC_NOT_MAPPED;
716 return STATUS_ACCESS_DENIED;
719 dacl = sd_get_dacl( sd, &dacl_present );
720 owner = sd_get_owner( sd );
721 if (!owner || !sd_get_group( sd ))
724 *status = STATUS_INVALID_SECURITY_DESCR;
725 return STATUS_ACCESS_DENIED;
728 /* 1: Grant desired access if the object is unprotected */
732 *granted_access = desired_access;
733 return STATUS_SUCCESS;
738 return STATUS_ACCESS_DENIED;
741 /* 2: Check if caller wants access to system security part. Note: access
742 * is only granted if specifically asked for */
743 if (desired_access & ACCESS_SYSTEM_SECURITY)
745 const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
746 LUID_AND_ATTRIBUTES retpriv = security_priv;
747 if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
751 /* assumes that there will only be one privilege to return */
752 if (*priv_count >= 1)
760 return STATUS_BUFFER_TOO_SMALL;
763 current_access |= ACCESS_SYSTEM_SECURITY;
764 if (desired_access == current_access)
766 *granted_access = current_access;
767 return STATUS_SUCCESS;
773 return STATUS_PRIVILEGE_NOT_HELD;
776 else if (priv_count) *priv_count = 0;
778 /* 3: Check whether the token is the owner */
779 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
780 * checked when a "set owner" call is made, overriding the access rights
781 * determined here. */
782 if (token_sid_present( token, owner, FALSE ))
784 current_access |= (READ_CONTROL | WRITE_DAC);
785 if (desired_access == current_access)
787 *granted_access = current_access;
788 return STATUS_SUCCESS;
792 /* 4: Grant rights according to the DACL */
793 ace = (const ACE_HEADER *)(dacl + 1);
794 for (i = 0; i < dacl->AceCount; i++)
796 const ACCESS_ALLOWED_ACE *aa_ace;
797 const ACCESS_DENIED_ACE *ad_ace;
799 switch (ace->AceType)
801 case ACCESS_DENIED_ACE_TYPE:
802 ad_ace = (const ACCESS_DENIED_ACE *)ace;
803 sid = (const SID *)&ad_ace->SidStart;
804 if (token_sid_present( token, sid, TRUE ))
806 unsigned int access = ad_ace->Mask;
807 map_generic_mask(&access, mapping);
808 if (desired_access & MAXIMUM_ALLOWED)
809 denied_access |= access;
812 denied_access |= (access & ~current_access);
813 if (desired_access & access)
816 return STATUS_SUCCESS;
821 case ACCESS_ALLOWED_ACE_TYPE:
822 aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
823 sid = (const SID *)&aa_ace->SidStart;
824 if (token_sid_present( token, sid, FALSE ))
826 unsigned int access = aa_ace->Mask;
827 map_generic_mask(&access, mapping);
828 if (desired_access & MAXIMUM_ALLOWED)
829 current_access |= access;
831 current_access |= (access & ~denied_access);
836 /* don't bother carrying on checking if we've already got all of
838 if (desired_access == *granted_access)
841 ace = ace_next( ace );
844 if (desired_access & MAXIMUM_ALLOWED)
846 *granted_access = current_access & ~denied_access;
848 return STATUS_SUCCESS;
850 return STATUS_ACCESS_DENIED;
854 if ((current_access & desired_access) == desired_access)
856 *granted_access = current_access & desired_access;
857 return STATUS_SUCCESS;
860 return STATUS_ACCESS_DENIED;
864 const ACL *token_get_default_dacl( struct token *token )
866 return token->default_dacl;
869 /* open a security token */
870 DECL_HANDLER(open_token)
872 if (req->flags & OPEN_TOKEN_THREAD)
874 struct thread *thread = get_thread_from_handle( req->handle, 0 );
878 reply->token = alloc_handle( current->process, thread->token, TOKEN_ALL_ACCESS, 0);
880 set_error(STATUS_NO_TOKEN);
881 release_object( thread );
886 struct process *process = get_process_from_handle( req->handle, 0 );
890 reply->token = alloc_handle( current->process, process->token, TOKEN_ALL_ACCESS, 0);
892 set_error(STATUS_NO_TOKEN);
893 release_object( process );
898 /* adjust the privileges held by a token */
899 DECL_HANDLER(adjust_token_privileges)
902 unsigned int access = TOKEN_ADJUST_PRIVILEGES;
904 if (req->get_modified_state) access |= TOKEN_QUERY;
906 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
907 access, &token_ops )))
909 const LUID_AND_ATTRIBUTES *privs = get_req_data();
910 LUID_AND_ATTRIBUTES *modified_privs = NULL;
911 unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
912 unsigned int modified_priv_count = 0;
914 if (req->get_modified_state && !req->disable_all)
917 /* count modified privs */
918 for (i = 0; i < priv_count; i++)
920 struct privilege *privilege =
921 token_find_privilege( token, &privs[i].Luid, FALSE );
922 if (privilege && req->get_modified_state)
923 modified_priv_count++;
925 reply->len = modified_priv_count;
926 modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
927 if (modified_priv_count)
928 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
930 reply->len = modified_priv_count * sizeof(*modified_privs);
932 if (req->disable_all)
933 token_disable_privileges( token );
935 modified_priv_count = token_adjust_privileges( token, privs,
936 priv_count, modified_privs, modified_priv_count );
938 release_object( token );
942 /* retrieves the list of privileges that may be held be the token */
943 DECL_HANDLER(get_token_privileges)
947 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
952 LUID_AND_ATTRIBUTES *privs;
953 struct privilege *privilege;
955 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
958 reply->len = priv_count * sizeof(*privs);
959 if (reply->len <= get_reply_max_size())
961 privs = set_reply_data_size( priv_count * sizeof(*privs) );
965 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
967 luid_and_attr_from_privilege( &privs[i], privilege );
973 set_error(STATUS_BUFFER_TOO_SMALL);
975 release_object( token );
979 /* creates a duplicate of the token */
980 DECL_HANDLER(duplicate_token)
982 struct token *src_token;
983 if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
987 /* FIXME: use req->impersonation_level */
988 struct token *token = create_token( req->primary, src_token->user, NULL, 0, NULL, 0, src_token->default_dacl );
991 struct privilege *privilege;
992 struct sid_and_attributes *group;
996 LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct sid_and_attributes, entry )
998 size_t size = FIELD_OFFSET( struct sid_and_attributes, sid.SubAuthority[group->sid.SubAuthorityCount] );
999 struct sid_and_attributes *newgroup = mem_alloc( size );
1000 memcpy( newgroup, group, size );
1001 list_add_tail( &token->groups, &newgroup->entry );
1004 /* copy privileges */
1005 LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
1006 privilege_add( token, &privilege->luid, privilege->enabled );
1008 access = req->access;
1009 if (access & MAXIMUM_ALLOWED) access = TOKEN_ALL_ACCESS; /* FIXME: needs general solution */
1010 reply->new_handle = alloc_handle( current->process, token, access, req->inherit);
1011 release_object( token );
1013 release_object( src_token );
1017 /* checks the specified privileges are held by the token */
1018 DECL_HANDLER(check_token_privileges)
1020 struct token *token;
1022 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1026 unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1027 if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1029 LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1030 reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1033 set_error( STATUS_BUFFER_OVERFLOW );
1034 release_object( token );
1038 /* checks that a user represented by a token is allowed to access an object
1039 * represented by a security descriptor */
1040 DECL_HANDLER(access_check)
1042 size_t sd_size = get_req_data_size();
1043 const struct security_descriptor *sd = get_req_data();
1044 struct token *token;
1046 if (!sd_is_valid( sd, sd_size ))
1048 set_error( STATUS_ACCESS_VIOLATION );
1052 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1056 GENERIC_MAPPING mapping;
1057 unsigned int status;
1058 LUID_AND_ATTRIBUTES priv;
1059 unsigned int priv_count = 1;
1061 memset(&priv, 0, sizeof(priv));
1063 /* only impersonation tokens may be used with this function */
1066 set_error( STATUS_NO_IMPERSONATION_TOKEN );
1067 release_object( token );
1071 mapping.GenericRead = req->mapping_read;
1072 mapping.GenericWrite = req->mapping_write;
1073 mapping.GenericExecute = req->mapping_execute;
1074 mapping.GenericAll = req->mapping_all;
1076 reply->access_status = token_access_check(
1077 token, sd, req->desired_access, &priv, &priv_count, &mapping,
1078 &reply->access_granted, &status );
1080 reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1082 if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1084 LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1085 memcpy( privs, &priv, sizeof(priv) );
1088 if (status != STATUS_SUCCESS)
1089 set_error( status );
1091 release_object( token );