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
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;
77 static LUID prev_luid_value = { 1000, 0 };
81 struct object obj; /* object header */
82 LUID token_id; /* system-unique id of token */
83 LUID modified_id; /* new id allocated every time token is modified */
84 struct list privileges; /* privileges available to the token */
85 struct list groups; /* groups that the user of this token belongs to (sid_and_attributes) */
86 SID *user; /* SID of user this token represents */
87 SID *primary_group; /* SID of user's primary group */
88 unsigned primary; /* is this a primary or impersonation token? */
89 ACL *default_dacl; /* the default DACL to assign to objects created by this user */
90 TOKEN_SOURCE source; /* source of the token */
91 SECURITY_IMPERSONATION_LEVEL impersonation_level; /* impersonation level this token is capable of if non-primary token */
98 unsigned enabled : 1; /* is the privilege currently enabled? */
99 unsigned def : 1; /* is the privilege enabled by default? */
105 unsigned enabled : 1; /* is the sid currently enabled? */
106 unsigned def : 1; /* is the sid enabled by default? */
107 unsigned logon : 1; /* is this a logon sid? */
108 unsigned mandatory: 1; /* is this sid always enabled? */
109 unsigned owner : 1; /* can this sid be an owner of an object? */
110 unsigned resource : 1; /* is this a domain-local group? */
111 unsigned deny_only: 1; /* is this a sid that should be use for denying only? */
115 static void token_dump( struct object *obj, int verbose );
116 static unsigned int token_map_access( struct object *obj, unsigned int access );
117 static void token_destroy( struct object *obj );
119 static const struct object_ops token_ops =
121 sizeof(struct token), /* size */
122 token_dump, /* dump */
123 no_add_queue, /* add_queue */
124 NULL, /* remove_queue */
126 NULL, /* satisfied */
127 no_signal, /* signal */
128 no_get_fd, /* get_fd */
129 token_map_access, /* map_access */
130 no_lookup_name, /* lookup_name */
131 no_close_handle, /* close_handle */
132 token_destroy /* destroy */
136 static void token_dump( struct object *obj, int verbose )
138 fprintf( stderr, "Security token\n" );
139 /* FIXME: dump token members */
142 static unsigned int token_map_access( struct object *obj, unsigned int access )
144 if (access & GENERIC_READ) access |= TOKEN_READ;
145 if (access & GENERIC_WRITE) access |= TOKEN_WRITE;
146 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
147 if (access & GENERIC_ALL) access |= TOKEN_ALL_ACCESS;
148 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
151 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
154 SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
155 if (!sid) return NULL;
156 sid->Revision = SID_REVISION;
157 sid->SubAuthorityCount = subauthcount;
158 sid->IdentifierAuthority = *idauthority;
159 for (i = 0; i < subauthcount; i++)
160 sid->SubAuthority[i] = subauth[i];
164 static inline int security_equal_sid( const SID *sid1, const SID *sid2 )
166 return ((sid1->SubAuthorityCount == sid2->SubAuthorityCount) &&
167 !memcmp( sid1, sid2, FIELD_OFFSET(SID, SubAuthority[sid1->SubAuthorityCount]) ));
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 static const ACE_HEADER *ace_next( const ACE_HEADER *ace )
195 return (const ACE_HEADER *)((const char *)ace + ace->AceSize);
198 static int acl_is_valid( const ACL *acl, data_size_t size )
201 const ACE_HEADER *ace;
203 if (size < sizeof(ACL))
206 size = min(size, MAX_ACL_LEN);
210 ace = (const ACE_HEADER *)(acl + 1);
211 for (i = 0; i < acl->AceCount; i++)
214 data_size_t sid_size;
216 if (size < sizeof(ACE_HEADER))
218 if (size < ace->AceSize)
220 size -= ace->AceSize;
221 switch (ace->AceType)
223 case ACCESS_DENIED_ACE_TYPE:
224 sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
225 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
227 case ACCESS_ALLOWED_ACE_TYPE:
228 sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
229 sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
231 case SYSTEM_AUDIT_ACE_TYPE:
232 sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
233 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
235 case SYSTEM_ALARM_ACE_TYPE:
236 sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
237 sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
242 if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
243 sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
245 ace = ace_next( ace );
250 /* gets the discretionary access control list from a security descriptor */
251 static inline const ACL *sd_get_dacl( const struct security_descriptor *sd, int *present )
253 *present = (sd->control & SE_DACL_PRESENT ? TRUE : FALSE);
256 return (const ACL *)((const char *)(sd + 1) +
257 sd->owner_len + sd->group_len + sd->sacl_len);
262 /* gets the system access control list from a security descriptor */
263 static inline const ACL *sd_get_sacl( const struct security_descriptor *sd, int *present )
265 *present = (sd->control & SE_SACL_PRESENT ? TRUE : FALSE);
268 return (const ACL *)((const char *)(sd + 1) +
269 sd->owner_len + sd->group_len);
274 /* gets the owner from a security descriptor */
275 static inline const SID *sd_get_owner( const struct security_descriptor *sd )
278 return (const SID *)(sd + 1);
283 /* gets the primary group from a security descriptor */
284 static inline const SID *sd_get_group( const struct security_descriptor *sd )
287 return (const SID *)((const char *)(sd + 1) + sd->owner_len);
292 /* checks whether all members of a security descriptor fit inside the size
293 * of memory specified */
294 static int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
296 size_t offset = sizeof(struct security_descriptor);
306 if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
307 (offset + sd->owner_len > size))
309 owner = sd_get_owner( sd );
312 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
313 if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
316 offset += sd->owner_len;
318 if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
319 (offset + sd->group_len > size))
321 group = sd_get_group( sd );
324 size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
325 if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
328 offset += sd->group_len;
330 if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
332 sacl = sd_get_sacl( sd, &dummy );
333 if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
335 offset += sd->sacl_len;
337 if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
339 dacl = sd_get_dacl( sd, &dummy );
340 if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
342 offset += sd->dacl_len;
347 /* maps from generic rights to specific rights as given by a mapping */
348 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
350 if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
351 if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
352 if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
353 if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
357 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
359 return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
362 static inline void allocate_luid( LUID *luid )
364 prev_luid_value.LowPart++;
365 *luid = prev_luid_value;
368 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
370 out->Luid = in->luid;
372 (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
373 (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
376 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
378 struct privilege *privilege = mem_alloc( sizeof(*privilege) );
381 privilege->luid = *luid;
382 privilege->def = privilege->enabled = (enabled != 0);
383 list_add_tail( &token->privileges, &privilege->entry );
388 static inline void privilege_remove( struct privilege *privilege )
390 list_remove( &privilege->entry );
394 static void token_destroy( struct object *obj )
397 struct list *cursor, *cursor_next;
399 assert( obj->ops == &token_ops );
400 token = (struct token *)obj;
404 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
406 struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
407 privilege_remove( privilege );
410 LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
412 struct group *group = LIST_ENTRY( cursor, struct group, entry );
413 list_remove( &group->entry );
417 free( token->default_dacl );
420 /* creates a new token.
421 * groups may be NULL if group_count is 0.
422 * privs may be NULL if priv_count is 0.
423 * default_dacl may be NULL, indicating that all objects created by the user
425 * modified_id may be NULL, indicating that a new modified_id luid should be
428 static struct token *create_token( unsigned primary, const SID *user,
429 const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
430 const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
431 const ACL *default_dacl, TOKEN_SOURCE source,
432 const LUID *modified_id,
433 SECURITY_IMPERSONATION_LEVEL impersonation_level )
435 struct token *token = alloc_object( &token_ops );
440 allocate_luid( &token->token_id );
442 token->modified_id = *modified_id;
444 allocate_luid( &token->modified_id );
445 list_init( &token->privileges );
446 list_init( &token->groups );
447 token->primary = primary;
448 /* primary tokens don't have impersonation levels */
450 token->impersonation_level = -1;
452 token->impersonation_level = impersonation_level;
453 token->default_dacl = NULL;
454 token->primary_group = NULL;
457 token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
460 release_object( token );
465 for (i = 0; i < group_count; i++)
467 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
468 struct group *group = mem_alloc( size );
472 release_object( token );
475 memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
476 group->enabled = TRUE;
478 group->logon = FALSE;
479 group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
480 group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
481 group->resource = FALSE;
482 group->deny_only = FALSE;
483 list_add_tail( &token->groups, &group->entry );
484 /* Use first owner capable group as an owner */
485 if (!token->primary_group && group->owner)
486 token->primary_group = &group->sid;
489 /* copy privileges */
490 for (i = 0; i < priv_count; i++)
492 /* note: we don't check uniqueness: the caller must make sure
493 * privs doesn't contain any duplicate luids */
494 if (!privilege_add( token, &privs[i].Luid,
495 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
497 release_object( token );
504 token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
505 if (!token->default_dacl)
507 release_object( token );
512 token->source = source;
517 static ACL *create_default_dacl( const SID *user )
519 ACCESS_ALLOWED_ACE *aaa;
522 size_t default_dacl_size = sizeof(ACL) +
523 2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
524 sizeof(local_system_sid) +
525 FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
527 default_dacl = mem_alloc( default_dacl_size );
528 if (!default_dacl) return NULL;
530 default_dacl->AclRevision = MAX_ACL_REVISION;
531 default_dacl->Sbz1 = 0;
532 default_dacl->AclSize = default_dacl_size;
533 default_dacl->AceCount = 2;
534 default_dacl->Sbz2 = 0;
536 /* GENERIC_ALL for Local System */
537 aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
538 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
539 aaa->Header.AceFlags = 0;
540 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
541 sizeof(local_system_sid);
542 aaa->Mask = GENERIC_ALL;
543 sid = (SID *)&aaa->SidStart;
544 memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
546 /* GENERIC_ALL for specified user */
547 aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
548 aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
549 aaa->Header.AceFlags = 0;
550 aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
551 FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
552 aaa->Mask = GENERIC_ALL;
553 sid = (SID *)&aaa->SidStart;
554 memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
561 SID_IDENTIFIER_AUTHORITY idauth;
563 unsigned int subauth[MAX_SUBAUTH_COUNT];
566 struct token *token_create_admin( void )
568 struct token *token = NULL;
569 static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
570 static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
571 static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
572 PSID alias_admins_sid;
573 PSID alias_users_sid;
574 /* note: should be the owner specified in the token */
575 ACL *default_dacl = create_default_dacl( &interactive_sid );
577 alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
578 alias_admins_subauth );
579 alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
580 alias_users_subauth );
582 if (alias_admins_sid && alias_users_sid && default_dacl)
584 const LUID_AND_ATTRIBUTES admin_privs[] =
586 { SeChangeNotifyPrivilege , SE_PRIVILEGE_ENABLED },
587 { SeSecurityPrivilege , 0 },
588 { SeBackupPrivilege , 0 },
589 { SeRestorePrivilege , 0 },
590 { SeSystemtimePrivilege , 0 },
591 { SeShutdownPrivilege , 0 },
592 { SeRemoteShutdownPrivilege , 0 },
593 { SeTakeOwnershipPrivilege , 0 },
594 { SeDebugPrivilege , 0 },
595 { SeSystemEnvironmentPrivilege , 0 },
596 { SeSystemProfilePrivilege , 0 },
597 { SeProfileSingleProcessPrivilege, 0 },
598 { SeIncreaseBasePriorityPrivilege, 0 },
599 { SeLoadDriverPrivilege , 0 },
600 { SeCreatePagefilePrivilege , 0 },
601 { SeIncreaseQuotaPrivilege , 0 },
602 { SeUndockPrivilege , 0 },
603 { SeManageVolumePrivilege , 0 },
604 { SeImpersonatePrivilege , SE_PRIVILEGE_ENABLED },
605 { SeCreateGlobalPrivilege , SE_PRIVILEGE_ENABLED },
607 /* note: we don't include non-builtin groups here for the user -
608 * telling us these is the job of a client-side program */
609 const SID_AND_ATTRIBUTES admin_groups[] =
611 { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
612 { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
613 { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
614 { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
615 { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
616 { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
618 static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
619 /* note: we just set the user sid to be the interactive builtin sid -
620 * we should really translate the UNIX user id to a sid */
621 token = create_token( TRUE, &interactive_sid,
622 admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
623 admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
624 default_dacl, admin_source, NULL, -1 );
625 /* we really need a primary group */
626 assert( token->primary_group );
629 free( alias_admins_sid );
630 free( alias_users_sid );
631 free( default_dacl );
636 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
638 struct privilege *privilege;
639 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
641 if (is_equal_luid( luid, &privilege->luid ))
643 if (enabled_only && !privilege->enabled)
651 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
652 unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
653 unsigned int mod_privs_count )
655 unsigned int i, modified_count = 0;
657 /* mark as modified */
658 allocate_luid( &token->modified_id );
660 for (i = 0; i < count; i++)
662 struct privilege *privilege =
663 token_find_privilege( token, &privs[i].Luid, FALSE );
666 set_error( STATUS_NOT_ALL_ASSIGNED );
670 if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
671 privilege_remove( privilege );
674 /* save previous state for caller */
677 luid_and_attr_from_privilege(mod_privs, privilege);
683 if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
684 privilege->enabled = TRUE;
686 privilege->enabled = FALSE;
689 return modified_count;
692 static void token_disable_privileges( struct token *token )
694 struct privilege *privilege;
696 /* mark as modified */
697 allocate_luid( &token->modified_id );
699 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
700 privilege->enabled = FALSE;
703 int token_check_privileges( struct token *token, int all_required,
704 const LUID_AND_ATTRIBUTES *reqprivs,
705 unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
707 unsigned int i, enabled_count = 0;
709 for (i = 0; i < count; i++)
711 struct privilege *privilege =
712 token_find_privilege( token, &reqprivs[i].Luid, TRUE );
715 usedprivs[i] = reqprivs[i];
717 if (privilege && privilege->enabled)
721 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
726 return (enabled_count == count);
728 return (enabled_count > 0);
731 static int token_sid_present( struct token *token, const SID *sid, int deny )
735 if (security_equal_sid( token->user, sid )) return TRUE;
737 LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
739 if (!group->enabled) continue;
740 if (group->deny_only && !deny) continue;
742 if (security_equal_sid( &group->sid, sid )) return TRUE;
748 /* Checks access to a security descriptor. 'sd' must have been validated by
749 * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
750 * the reason. 'status' parameter will indicate if access is granted or denied.
752 * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
754 static unsigned int token_access_check( struct token *token,
755 const struct security_descriptor *sd,
756 unsigned int desired_access,
757 LUID_AND_ATTRIBUTES *privs,
758 unsigned int *priv_count,
759 const GENERIC_MAPPING *mapping,
760 unsigned int *granted_access,
761 unsigned int *status )
763 unsigned int current_access = 0;
764 unsigned int denied_access = 0;
768 const ACE_HEADER *ace;
771 /* assume no access rights */
774 /* fail if desired_access contains generic rights */
775 if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
778 return STATUS_GENERIC_NOT_MAPPED;
781 dacl = sd_get_dacl( sd, &dacl_present );
782 owner = sd_get_owner( sd );
783 if (!owner || !sd_get_group( sd ))
786 return STATUS_INVALID_SECURITY_DESCR;
789 /* 1: Grant desired access if the object is unprotected */
793 *granted_access = desired_access;
794 return *status = STATUS_SUCCESS;
799 *status = STATUS_ACCESS_DENIED;
800 return STATUS_SUCCESS;
803 /* 2: Check if caller wants access to system security part. Note: access
804 * is only granted if specifically asked for */
805 if (desired_access & ACCESS_SYSTEM_SECURITY)
807 const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
808 LUID_AND_ATTRIBUTES retpriv = security_priv;
809 if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
813 /* assumes that there will only be one privilege to return */
814 if (*priv_count >= 1)
822 return STATUS_BUFFER_TOO_SMALL;
825 current_access |= ACCESS_SYSTEM_SECURITY;
826 if (desired_access == current_access)
828 *granted_access = current_access;
829 return *status = STATUS_SUCCESS;
835 *status = STATUS_PRIVILEGE_NOT_HELD;
836 return STATUS_SUCCESS;
839 else if (priv_count) *priv_count = 0;
841 /* 3: Check whether the token is the owner */
842 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
843 * checked when a "set owner" call is made, overriding the access rights
844 * determined here. */
845 if (token_sid_present( token, owner, FALSE ))
847 current_access |= (READ_CONTROL | WRITE_DAC);
848 if (desired_access == current_access)
850 *granted_access = current_access;
851 return *status = STATUS_SUCCESS;
855 /* 4: Grant rights according to the DACL */
856 ace = (const ACE_HEADER *)(dacl + 1);
857 for (i = 0; i < dacl->AceCount; i++)
859 const ACCESS_ALLOWED_ACE *aa_ace;
860 const ACCESS_DENIED_ACE *ad_ace;
862 switch (ace->AceType)
864 case ACCESS_DENIED_ACE_TYPE:
865 ad_ace = (const ACCESS_DENIED_ACE *)ace;
866 sid = (const SID *)&ad_ace->SidStart;
867 if (token_sid_present( token, sid, TRUE ))
869 unsigned int access = ad_ace->Mask;
870 map_generic_mask(&access, mapping);
871 if (desired_access & MAXIMUM_ALLOWED)
872 denied_access |= access;
875 denied_access |= (access & ~current_access);
876 if (desired_access & access) goto done;
880 case ACCESS_ALLOWED_ACE_TYPE:
881 aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
882 sid = (const SID *)&aa_ace->SidStart;
883 if (token_sid_present( token, sid, FALSE ))
885 unsigned int access = aa_ace->Mask;
886 map_generic_mask(&access, mapping);
887 if (desired_access & MAXIMUM_ALLOWED)
888 current_access |= access;
890 current_access |= (access & ~denied_access);
895 /* don't bother carrying on checking if we've already got all of
897 if (desired_access == *granted_access)
900 ace = ace_next( ace );
904 if (desired_access & MAXIMUM_ALLOWED)
905 *granted_access = current_access & ~denied_access;
907 if ((current_access & desired_access) == desired_access)
908 *granted_access = current_access & desired_access;
912 *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
913 return STATUS_SUCCESS;
916 const ACL *token_get_default_dacl( struct token *token )
918 return token->default_dacl;
921 static void set_object_sd( struct object *obj, const struct security_descriptor *sd,
922 unsigned int set_info )
924 struct security_descriptor new_sd, *pnew_sd;
926 const SID *owner, *group;
927 const ACL *sacl, *dacl;
930 if (!set_info) return;
932 new_sd.control = sd->control & ~SE_SELF_RELATIVE;
934 owner = sd_get_owner( sd );
935 if (set_info & OWNER_SECURITY_INFORMATION && owner)
936 new_sd.owner_len = sd->owner_len;
939 owner = current->process->token->user;
940 new_sd.owner_len = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
941 new_sd.control |= SE_OWNER_DEFAULTED;
944 group = sd_get_group( sd );
945 if (set_info & GROUP_SECURITY_INFORMATION && group)
946 new_sd.group_len = sd->group_len;
949 group = current->process->token->primary_group;
950 new_sd.group_len = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
951 new_sd.control |= SE_GROUP_DEFAULTED;
954 new_sd.control |= SE_SACL_PRESENT;
955 sacl = sd_get_sacl( sd, &present );
956 if (set_info & SACL_SECURITY_INFORMATION && present)
957 new_sd.sacl_len = sd->sacl_len;
960 if (obj->sd) sacl = sd_get_sacl( obj->sd, &present );
962 if (obj->sd && present)
963 new_sd.sacl_len = obj->sd->sacl_len;
967 new_sd.control |= SE_SACL_DEFAULTED;
971 new_sd.control |= SE_DACL_PRESENT;
972 dacl = sd_get_dacl( sd, &present );
973 if (set_info & DACL_SECURITY_INFORMATION && present)
974 new_sd.dacl_len = sd->dacl_len;
977 if (obj->sd) dacl = sd_get_dacl( obj->sd, &present );
979 if (obj->sd && present)
980 new_sd.dacl_len = obj->sd->dacl_len;
983 dacl = token_get_default_dacl( current->process->token );
984 new_sd.dacl_len = dacl->AclSize;
985 new_sd.control |= SE_DACL_DEFAULTED;
989 ptr = mem_alloc( sizeof(new_sd) + new_sd.owner_len + new_sd.group_len +
990 new_sd.sacl_len + new_sd.dacl_len );
992 pnew_sd = (struct security_descriptor*)ptr;
994 memcpy( ptr, &new_sd, sizeof(new_sd) );
995 ptr += sizeof(new_sd);
996 memcpy( ptr, owner, new_sd.owner_len );
997 ptr += new_sd.owner_len;
998 memcpy( ptr, group, new_sd.group_len );
999 ptr += new_sd.group_len;
1000 memcpy( ptr, sacl, new_sd.sacl_len );
1001 ptr += new_sd.sacl_len;
1002 memcpy( ptr, dacl, new_sd.dacl_len );
1008 int check_object_access(struct object *obj, unsigned int *access)
1010 GENERIC_MAPPING mapping;
1011 struct token *token = current->token ? current->token : current->process->token;
1012 LUID_AND_ATTRIBUTES priv;
1013 unsigned int status, priv_count = 1;
1016 mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );
1020 if (*access & MAXIMUM_ALLOWED)
1021 *access = mapping.GenericAll;
1025 mapping.GenericRead = obj->ops->map_access( obj, GENERIC_READ );
1026 mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
1027 mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );
1029 res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
1030 &mapping, access, &status ) == STATUS_SUCCESS &&
1031 status == STATUS_SUCCESS;
1033 if (!res) set_error( STATUS_ACCESS_DENIED );
1038 /* open a security token */
1039 DECL_HANDLER(open_token)
1041 if (req->flags & OPEN_TOKEN_THREAD)
1043 struct thread *thread = get_thread_from_handle( req->handle, 0 );
1048 if (thread->token->impersonation_level <= SecurityAnonymous)
1049 set_error( STATUS_CANT_OPEN_ANONYMOUS );
1051 reply->token = alloc_handle( current->process, thread->token,
1052 req->access, req->attributes );
1055 set_error( STATUS_NO_TOKEN );
1056 release_object( thread );
1061 struct process *process = get_process_from_handle( req->handle, 0 );
1065 reply->token = alloc_handle( current->process, process->token, req->access,
1068 set_error( STATUS_NO_TOKEN );
1069 release_object( process );
1074 /* adjust the privileges held by a token */
1075 DECL_HANDLER(adjust_token_privileges)
1077 struct token *token;
1078 unsigned int access = TOKEN_ADJUST_PRIVILEGES;
1080 if (req->get_modified_state) access |= TOKEN_QUERY;
1082 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1083 access, &token_ops )))
1085 const LUID_AND_ATTRIBUTES *privs = get_req_data();
1086 LUID_AND_ATTRIBUTES *modified_privs = NULL;
1087 unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1088 unsigned int modified_priv_count = 0;
1090 if (req->get_modified_state && !req->disable_all)
1093 /* count modified privs */
1094 for (i = 0; i < priv_count; i++)
1096 struct privilege *privilege =
1097 token_find_privilege( token, &privs[i].Luid, FALSE );
1098 if (privilege && req->get_modified_state)
1099 modified_priv_count++;
1101 reply->len = modified_priv_count;
1102 modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
1103 if (modified_priv_count)
1104 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
1106 reply->len = modified_priv_count * sizeof(*modified_privs);
1108 if (req->disable_all)
1109 token_disable_privileges( token );
1111 modified_priv_count = token_adjust_privileges( token, privs,
1112 priv_count, modified_privs, modified_priv_count );
1114 release_object( token );
1118 /* retrieves the list of privileges that may be held be the token */
1119 DECL_HANDLER(get_token_privileges)
1121 struct token *token;
1123 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1128 LUID_AND_ATTRIBUTES *privs;
1129 struct privilege *privilege;
1131 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1134 reply->len = priv_count * sizeof(*privs);
1135 if (reply->len <= get_reply_max_size())
1137 privs = set_reply_data_size( priv_count * sizeof(*privs) );
1141 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1143 luid_and_attr_from_privilege( &privs[i], privilege );
1149 set_error(STATUS_BUFFER_TOO_SMALL);
1151 release_object( token );
1155 /* creates a duplicate of the token */
1156 DECL_HANDLER(duplicate_token)
1158 struct token *src_token;
1160 if ((req->impersonation_level < SecurityAnonymous) ||
1161 (req->impersonation_level > SecurityDelegation))
1163 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1167 if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
1171 const LUID *modified_id =
1172 req->primary || (req->impersonation_level == src_token->impersonation_level) ?
1173 &src_token->modified_id : NULL;
1174 struct token *token = NULL;
1176 if (req->primary || (req->impersonation_level <= src_token->impersonation_level))
1177 token = create_token( req->primary, src_token->user, NULL, 0,
1178 NULL, 0, src_token->default_dacl,
1179 src_token->source, modified_id,
1180 req->impersonation_level );
1181 else set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1185 struct privilege *privilege;
1186 struct group *group;
1187 unsigned int access;
1190 LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
1192 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
1193 struct group *newgroup = mem_alloc( size );
1196 release_object( token );
1197 release_object( src_token );
1200 memcpy( newgroup, group, size );
1201 list_add_tail( &token->groups, &newgroup->entry );
1203 token->primary_group = src_token->primary_group;
1204 assert( token->primary_group );
1206 /* copy privileges */
1207 LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
1208 privilege_add( token, &privilege->luid, privilege->enabled );
1210 access = req->access;
1211 if (access & MAXIMUM_ALLOWED) access = TOKEN_ALL_ACCESS; /* FIXME: needs general solution */
1212 reply->new_handle = alloc_handle( current->process, token, access, req->attributes);
1213 release_object( token );
1215 release_object( src_token );
1219 /* checks the specified privileges are held by the token */
1220 DECL_HANDLER(check_token_privileges)
1222 struct token *token;
1224 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1228 unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1230 if (!token->primary && token->impersonation_level <= SecurityAnonymous)
1231 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1232 else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1234 LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1235 reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1238 set_error( STATUS_BUFFER_OVERFLOW );
1239 release_object( token );
1243 /* checks that a user represented by a token is allowed to access an object
1244 * represented by a security descriptor */
1245 DECL_HANDLER(access_check)
1247 data_size_t sd_size = get_req_data_size();
1248 const struct security_descriptor *sd = get_req_data();
1249 struct token *token;
1251 if (!sd_is_valid( sd, sd_size ))
1253 set_error( STATUS_ACCESS_VIOLATION );
1257 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1261 GENERIC_MAPPING mapping;
1262 unsigned int status;
1263 LUID_AND_ATTRIBUTES priv;
1264 unsigned int priv_count = 1;
1266 memset(&priv, 0, sizeof(priv));
1268 /* only impersonation tokens may be used with this function */
1271 set_error( STATUS_NO_IMPERSONATION_TOKEN );
1272 release_object( token );
1275 /* anonymous impersonation tokens can't be used */
1276 if (token->impersonation_level <= SecurityAnonymous)
1278 set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1279 release_object( token );
1283 mapping.GenericRead = req->mapping_read;
1284 mapping.GenericWrite = req->mapping_write;
1285 mapping.GenericExecute = req->mapping_execute;
1286 mapping.GenericAll = req->mapping_all;
1288 status = token_access_check(
1289 token, sd, req->desired_access, &priv, &priv_count, &mapping,
1290 &reply->access_granted, &reply->access_status );
1292 reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1294 if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1296 LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1297 memcpy( privs, &priv, sizeof(priv) );
1300 set_error( status );
1301 release_object( token );
1305 /* retrieves the SID of the user that the token represents */
1306 DECL_HANDLER(get_token_user)
1308 struct token *token;
1310 reply->user_len = 0;
1312 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1316 const SID *user = token->user;
1318 reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
1319 if (reply->user_len <= get_reply_max_size())
1321 SID *user_reply = set_reply_data_size( reply->user_len );
1323 memcpy( user_reply, user, reply->user_len );
1325 else set_error( STATUS_BUFFER_TOO_SMALL );
1327 release_object( token );
1331 /* retrieves the groups that the user represented by the token belongs to */
1332 DECL_HANDLER(get_token_groups)
1334 struct token *token;
1336 reply->user_len = 0;
1338 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1342 size_t size_needed = sizeof(struct token_groups);
1343 unsigned int group_count = 0;
1344 const struct group *group;
1346 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1349 size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
1351 size_needed += sizeof(unsigned int) * group_count;
1353 reply->user_len = size_needed;
1355 if (size_needed <= get_reply_max_size())
1357 struct token_groups *tg = set_reply_data_size( size_needed );
1360 unsigned int *attr_ptr = (unsigned int *)(tg + 1);
1361 SID *sid_ptr = (SID *)(attr_ptr + group_count);
1363 tg->count = group_count;
1365 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1369 if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
1370 if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
1371 if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
1372 if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
1373 if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
1374 if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;
1376 memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1378 sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1383 else set_error( STATUS_BUFFER_TOO_SMALL );
1385 release_object( token );
1389 DECL_HANDLER(get_token_impersonation_level)
1391 struct token *token;
1393 if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1398 set_error( STATUS_INVALID_PARAMETER );
1400 reply->impersonation_level = token->impersonation_level;
1402 release_object( token );
1406 DECL_HANDLER(set_security_object)
1408 data_size_t sd_size = get_req_data_size();
1409 const struct security_descriptor *sd = get_req_data();
1411 unsigned int access = 0;
1413 if (!sd_is_valid( sd, sd_size ))
1415 set_error( STATUS_ACCESS_VIOLATION );
1419 if (req->security_info & OWNER_SECURITY_INFORMATION ||
1420 req->security_info & GROUP_SECURITY_INFORMATION)
1421 access |= WRITE_OWNER;
1422 if (req->security_info & SACL_SECURITY_INFORMATION)
1423 access |= ACCESS_SYSTEM_SECURITY;
1424 if (req->security_info & DACL_SECURITY_INFORMATION)
1425 access |= WRITE_DAC;
1427 if (!(obj = get_handle_obj( current->process, req->handle, access, NULL ))) return;
1429 set_object_sd( obj, sd, req->security_info );
1430 release_object( obj );