server/token.c

   1 /*
   2  * Tokens
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  * Copyright (C) 2003 Mike McCormack
   6  * Copyright (C) 2005 Robert Shearman
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  */
  22
  23 #include "config.h"
  24
  25 #include <assert.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <stdarg.h>
  29 #include <unistd.h>
  30
  31 #include "ntstatus.h"
  32 #define WIN32_NO_STATUS
  33 #include "windef.h"
  34 #include "winternl.h"
  35
  36 #include "handle.h"
  37 #include "thread.h"
  38 #include "process.h"
  39 #include "request.h"
  40 #include "security.h"
  41
  42 #include "wine/unicode.h"
  43
  44 #define MAX_SUBAUTH_COUNT 1
  45
  46 const LUID SeIncreaseQuotaPrivilege        = {  5, 0 };
  47 const LUID SeSecurityPrivilege             = {  8, 0 };
  48 const LUID SeTakeOwnershipPrivilege        = {  9, 0 };
  49 const LUID SeLoadDriverPrivilege           = { 10, 0 };
  50 const LUID SeSystemProfilePrivilege        = { 11, 0 };
  51 const LUID SeSystemtimePrivilege           = { 12, 0 };
  52 const LUID SeProfileSingleProcessPrivilege = { 13, 0 };
  53 const LUID SeIncreaseBasePriorityPrivilege = { 14, 0 };
  54 const LUID SeCreatePagefilePrivilege       = { 15, 0 };
  55 const LUID SeBackupPrivilege               = { 17, 0 };
  56 const LUID SeRestorePrivilege              = { 18, 0 };
  57 const LUID SeShutdownPrivilege             = { 19, 0 };
  58 const LUID SeDebugPrivilege                = { 20, 0 };
  59 const LUID SeSystemEnvironmentPrivilege    = { 22, 0 };
  60 const LUID SeChangeNotifyPrivilege         = { 23, 0 };
  61 const LUID SeRemoteShutdownPrivilege       = { 24, 0 };
  62 const LUID SeUndockPrivilege               = { 25, 0 };
  63 const LUID SeManageVolumePrivilege         = { 28, 0 };
  64 const LUID SeImpersonatePrivilege          = { 29, 0 };
  65 const LUID SeCreateGlobalPrivilege         = { 30, 0 };
  66
  67 static const SID world_sid = { SID_REVISION, 1, { SECURITY_WORLD_SID_AUTHORITY }, { SECURITY_WORLD_RID } };
  68 static const SID local_sid = { SID_REVISION, 1, { SECURITY_LOCAL_SID_AUTHORITY }, { SECURITY_LOCAL_RID } };
  69 static const SID interactive_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_INTERACTIVE_RID } };
  70 static const SID anonymous_logon_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_ANONYMOUS_LOGON_RID } };
  71 static const SID authenticated_user_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_AUTHENTICATED_USER_RID } };
  72 static const SID local_system_sid = { SID_REVISION, 1, { SECURITY_NT_AUTHORITY }, { SECURITY_LOCAL_SYSTEM_RID } };
  73 const PSID security_world_sid = (PSID)&world_sid;
  74 static const PSID security_local_sid = (PSID)&local_sid;
  75 const PSID security_interactive_sid = (PSID)&interactive_sid;
  76 static const PSID security_authenticated_user_sid = (PSID)&authenticated_user_sid;
  77 const PSID security_local_system_sid = (PSID)&local_system_sid;
  78
  79 static luid_t prev_luid_value = { 1000, 0 };
  80
  81 struct token
  82 {
  83     struct object  obj;             /* object header */
  84     luid_t         token_id;        /* system-unique id of token */
  85     luid_t         modified_id;     /* new id allocated every time token is modified */
  86     struct list    privileges;      /* privileges available to the token */
  87     struct list    groups;          /* groups that the user of this token belongs to (sid_and_attributes) */
  88     SID           *user;            /* SID of user this token represents */
  89     SID           *primary_group;   /* SID of user's primary group */
  90     unsigned       primary;         /* is this a primary or impersonation token? */
  91     ACL           *default_dacl;    /* the default DACL to assign to objects created by this user */
  92     TOKEN_SOURCE   source;          /* source of the token */
  93     SECURITY_IMPERSONATION_LEVEL impersonation_level; /* impersonation level this token is capable of if non-primary token */
  94 };
  95
  96 struct privilege
  97 {
  98     struct list entry;
  99     LUID        luid;
 100     unsigned    enabled  : 1; /* is the privilege currently enabled? */
 101     unsigned    def      : 1; /* is the privilege enabled by default? */
 102 };
 103
 104 struct group
 105 {
 106     struct list entry;
 107     unsigned    enabled  : 1; /* is the sid currently enabled? */
 108     unsigned    def      : 1; /* is the sid enabled by default? */
 109     unsigned    logon    : 1; /* is this a logon sid? */
 110     unsigned    mandatory: 1; /* is this sid always enabled? */
 111     unsigned    owner    : 1; /* can this sid be an owner of an object? */
 112     unsigned    resource : 1; /* is this a domain-local group? */
 113     unsigned    deny_only: 1; /* is this a sid that should be use for denying only? */
 114     SID         sid;
 115 };
 116
 117 static void token_dump( struct object *obj, int verbose );
 118 static unsigned int token_map_access( struct object *obj, unsigned int access );
 119 static void token_destroy( struct object *obj );
 120
 121 static const struct object_ops token_ops =
 122 {
 123     sizeof(struct token),      /* size */
 124     token_dump,                /* dump */
 125     no_add_queue,              /* add_queue */
 126     NULL,                      /* remove_queue */
 127     NULL,                      /* signaled */
 128     NULL,                      /* satisfied */
 129     no_signal,                 /* signal */
 130     no_get_fd,                 /* get_fd */
 131     token_map_access,          /* map_access */
 132     default_get_sd,            /* get_sd */
 133     default_set_sd,            /* set_sd */
 134     no_lookup_name,            /* lookup_name */
 135     no_open_file,              /* open_file */
 136     no_close_handle,           /* close_handle */
 137     token_destroy              /* destroy */
 138 };
 139
 140
 141 static void token_dump( struct object *obj, int verbose )
 142 {
 143     fprintf( stderr, "Security token\n" );
 144     /* FIXME: dump token members */
 145 }
 146
 147 static unsigned int token_map_access( struct object *obj, unsigned int access )
 148 {
 149     if (access & GENERIC_READ)    access |= TOKEN_READ;
 150     if (access & GENERIC_WRITE)   access |= TOKEN_WRITE;
 151     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
 152     if (access & GENERIC_ALL)     access |= TOKEN_ALL_ACCESS;
 153     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 154 }
 155
 156 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
 157 {
 158     int i;
 159     SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
 160     if (!sid) return NULL;
 161     sid->Revision = SID_REVISION;
 162     sid->SubAuthorityCount = subauthcount;
 163     sid->IdentifierAuthority = *idauthority;
 164     for (i = 0; i < subauthcount; i++)
 165         sid->SubAuthority[i] = subauth[i];
 166     return sid;
 167 }
 168
 169 void security_set_thread_token( struct thread *thread, obj_handle_t handle )
 170 {
 171     if (!handle)
 172     {
 173         if (thread->token)
 174             release_object( thread->token );
 175         thread->token = NULL;
 176     }
 177     else
 178     {
 179         struct token *token = (struct token *)get_handle_obj( current->process,
 180                                                               handle,
 181                                                               TOKEN_IMPERSONATE,
 182                                                               &token_ops );
 183         if (token)
 184         {
 185             if (thread->token)
 186                 release_object( thread->token );
 187             thread->token = token;
 188         }
 189     }
 190 }
 191
 192 const SID *security_unix_uid_to_sid( uid_t uid )
 193 {
 194     /* very simple mapping: either the current user or not the current user */
 195     if (uid == getuid())
 196         return &interactive_sid;
 197     else
 198         return &anonymous_logon_sid;
 199 }
 200
 201 static int acl_is_valid( const ACL *acl, data_size_t size )
 202 {
 203     ULONG i;
 204     const ACE_HEADER *ace;
 205
 206     if (size < sizeof(ACL))
 207         return FALSE;
 208
 209     size = min(size, MAX_ACL_LEN);
 210
 211     size -= sizeof(ACL);
 212
 213     ace = (const ACE_HEADER *)(acl + 1);
 214     for (i = 0; i < acl->AceCount; i++)
 215     {
 216         const SID *sid;
 217         data_size_t sid_size;
 218
 219         if (size < sizeof(ACE_HEADER))
 220             return FALSE;
 221         if (size < ace->AceSize)
 222             return FALSE;
 223         size -= ace->AceSize;
 224         switch (ace->AceType)
 225         {
 226         case ACCESS_DENIED_ACE_TYPE:
 227             sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
 228             sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
 229             break;
 230         case ACCESS_ALLOWED_ACE_TYPE:
 231             sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
 232             sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
 233             break;
 234         case SYSTEM_AUDIT_ACE_TYPE:
 235             sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
 236             sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
 237             break;
 238         case SYSTEM_ALARM_ACE_TYPE:
 239             sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
 240             sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
 241             break;
 242         default:
 243             return FALSE;
 244         }
 245         if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
 246             sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
 247             return FALSE;
 248         ace = ace_next( ace );
 249     }
 250     return TRUE;
 251 }
 252
 253 /* checks whether all members of a security descriptor fit inside the size
 254  * of memory specified */
 255 int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
 256 {
 257     size_t offset = sizeof(struct security_descriptor);
 258     const SID *group;
 259     const SID *owner;
 260     const ACL *sacl;
 261     const ACL *dacl;
 262     int dummy;
 263
 264     if (size < offset)
 265         return FALSE;
 266
 267     if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
 268         (offset + sd->owner_len > size))
 269         return FALSE;
 270     owner = sd_get_owner( sd );
 271     if (owner)
 272     {
 273         size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
 274         if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
 275             return FALSE;
 276     }
 277     offset += sd->owner_len;
 278
 279     if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
 280         (offset + sd->group_len > size))
 281         return FALSE;
 282     group = sd_get_group( sd );
 283     if (group)
 284     {
 285         size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
 286         if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
 287             return FALSE;
 288     }
 289     offset += sd->group_len;
 290
 291     if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
 292         return FALSE;
 293     sacl = sd_get_sacl( sd, &dummy );
 294     if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
 295         return FALSE;
 296     offset += sd->sacl_len;
 297
 298     if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
 299         return FALSE;
 300     dacl = sd_get_dacl( sd, &dummy );
 301     if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
 302         return FALSE;
 303     offset += sd->dacl_len;
 304
 305     return TRUE;
 306 }
 307
 308 /* maps from generic rights to specific rights as given by a mapping */
 309 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
 310 {
 311     if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
 312     if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
 313     if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
 314     if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
 315     *mask &= 0x0FFFFFFF;
 316 }
 317
 318 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
 319 {
 320     return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
 321 }
 322
 323 static inline void allocate_luid( luid_t *luid )
 324 {
 325     prev_luid_value.low_part++;
 326     *luid = prev_luid_value;
 327 }
 328
 329 DECL_HANDLER( allocate_locally_unique_id )
 330 {
 331     allocate_luid( &reply->luid );
 332 }
 333
 334 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
 335 {
 336     out->Luid = in->luid;
 337     out->Attributes =
 338         (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
 339         (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
 340 }
 341
 342 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
 343 {
 344     struct privilege *privilege = mem_alloc( sizeof(*privilege) );
 345     if (privilege)
 346     {
 347         privilege->luid = *luid;
 348         privilege->def = privilege->enabled = (enabled != 0);
 349         list_add_tail( &token->privileges, &privilege->entry );
 350     }
 351     return privilege;
 352 }
 353
 354 static inline void privilege_remove( struct privilege *privilege )
 355 {
 356     list_remove( &privilege->entry );
 357     free( privilege );
 358 }
 359
 360 static void token_destroy( struct object *obj )
 361 {
 362     struct token* token;
 363     struct list *cursor, *cursor_next;
 364
 365     assert( obj->ops == &token_ops );
 366     token = (struct token *)obj;
 367
 368     free( token->user );
 369
 370     LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
 371     {
 372         struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
 373         privilege_remove( privilege );
 374     }
 375
 376     LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
 377     {
 378         struct group *group = LIST_ENTRY( cursor, struct group, entry );
 379         list_remove( &group->entry );
 380         free( group );
 381     }
 382
 383     free( token->default_dacl );
 384 }
 385
 386 /* creates a new token.
 387  *  groups may be NULL if group_count is 0.
 388  *  privs may be NULL if priv_count is 0.
 389  *  default_dacl may be NULL, indicating that all objects created by the user
 390  *   are unsecured.
 391  *  modified_id may be NULL, indicating that a new modified_id luid should be
 392  *   allocated.
 393  */
 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, TOKEN_SOURCE source,
 398                                    const luid_t *modified_id,
 399                                    SECURITY_IMPERSONATION_LEVEL impersonation_level )
 400 {
 401     struct token *token = alloc_object( &token_ops );
 402     if (token)
 403     {
 404         unsigned int i;
 405
 406         allocate_luid( &token->token_id );
 407         if (modified_id)
 408             token->modified_id = *modified_id;
 409         else
 410             allocate_luid( &token->modified_id );
 411         list_init( &token->privileges );
 412         list_init( &token->groups );
 413         token->primary = primary;
 414         /* primary tokens don't have impersonation levels */
 415         if (primary)
 416             token->impersonation_level = -1;
 417         else
 418             token->impersonation_level = impersonation_level;
 419         token->default_dacl = NULL;
 420         token->primary_group = NULL;
 421
 422         /* copy user */
 423         token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
 424         if (!token->user)
 425         {
 426             release_object( token );
 427             return NULL;
 428         }
 429
 430         /* copy groups */
 431         for (i = 0; i < group_count; i++)
 432         {
 433             size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
 434             struct group *group = mem_alloc( size );
 435
 436             if (!group)
 437             {
 438                 release_object( token );
 439                 return NULL;
 440             }
 441             memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
 442             group->enabled = TRUE;
 443             group->def = TRUE;
 444             group->logon = FALSE;
 445             group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
 446             group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
 447             group->resource = FALSE;
 448             group->deny_only = FALSE;
 449             list_add_tail( &token->groups, &group->entry );
 450             /* Use first owner capable group as an owner */
 451             if (!token->primary_group && group->owner)
 452                 token->primary_group = &group->sid;
 453         }
 454
 455         /* copy privileges */
 456         for (i = 0; i < priv_count; i++)
 457         {
 458             /* note: we don't check uniqueness: the caller must make sure
 459              * privs doesn't contain any duplicate luids */
 460             if (!privilege_add( token, &privs[i].Luid,
 461                                 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
 462             {
 463                 release_object( token );
 464                 return NULL;
 465             }
 466         }
 467
 468         if (default_dacl)
 469         {
 470             token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
 471             if (!token->default_dacl)
 472             {
 473                 release_object( token );
 474                 return NULL;
 475             }
 476         }
 477
 478         token->source = source;
 479     }
 480     return token;
 481 }
 482
 483 struct token *token_duplicate( struct token *src_token, unsigned primary,
 484                                SECURITY_IMPERSONATION_LEVEL impersonation_level )
 485 {
 486     const luid_t *modified_id =
 487         primary || (impersonation_level == src_token->impersonation_level) ?
 488             &src_token->modified_id : NULL;
 489     struct token *token = NULL;
 490     struct privilege *privilege;
 491     struct group *group;
 492
 493     if ((impersonation_level < SecurityAnonymous) ||
 494         (impersonation_level > SecurityDelegation))
 495     {
 496         set_error( STATUS_BAD_IMPERSONATION_LEVEL );
 497         return NULL;
 498     }
 499
 500     if (primary || (impersonation_level <= src_token->impersonation_level))
 501         token = create_token( primary, src_token->user, NULL, 0,
 502                               NULL, 0, src_token->default_dacl,
 503                               src_token->source, modified_id,
 504                               impersonation_level );
 505     else set_error( STATUS_BAD_IMPERSONATION_LEVEL );
 506
 507     if (!token) return token;
 508
 509     /* copy groups */
 510     LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
 511     {
 512         size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
 513         struct group *newgroup = mem_alloc( size );
 514         if (!newgroup)
 515         {
 516             release_object( token );
 517             return NULL;
 518         }
 519         memcpy( newgroup, group, size );
 520         list_add_tail( &token->groups, &newgroup->entry );
 521     }
 522     token->primary_group = src_token->primary_group;
 523     assert( token->primary_group );
 524
 525     /* copy privileges */
 526     LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
 527         if (!privilege_add( token, &privilege->luid, privilege->enabled ))
 528         {
 529             release_object( token );
 530             return NULL;
 531         }
 532
 533     return token;
 534 }
 535
 536 static ACL *create_default_dacl( const SID *user )
 537 {
 538     ACCESS_ALLOWED_ACE *aaa;
 539     ACL *default_dacl;
 540     SID *sid;
 541     size_t default_dacl_size = sizeof(ACL) +
 542                                2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
 543                                sizeof(local_system_sid) +
 544                                FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
 545
 546     default_dacl = mem_alloc( default_dacl_size );
 547     if (!default_dacl) return NULL;
 548
 549     default_dacl->AclRevision = ACL_REVISION;
 550     default_dacl->Sbz1 = 0;
 551     default_dacl->AclSize = default_dacl_size;
 552     default_dacl->AceCount = 2;
 553     default_dacl->Sbz2 = 0;
 554
 555     /* GENERIC_ALL for Local System */
 556     aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
 557     aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 558     aaa->Header.AceFlags = 0;
 559     aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
 560                           sizeof(local_system_sid);
 561     aaa->Mask = GENERIC_ALL;
 562     sid = (SID *)&aaa->SidStart;
 563     memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
 564
 565     /* GENERIC_ALL for specified user */
 566     aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
 567     aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 568     aaa->Header.AceFlags = 0;
 569     aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
 570                           FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
 571     aaa->Mask = GENERIC_ALL;
 572     sid = (SID *)&aaa->SidStart;
 573     memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
 574
 575     return default_dacl;
 576 }
 577
 578 struct sid_data
 579 {
 580     SID_IDENTIFIER_AUTHORITY idauth;
 581     int count;
 582     unsigned int subauth[MAX_SUBAUTH_COUNT];
 583 };
 584
 585 struct token *token_create_admin( void )
 586 {
 587     struct token *token = NULL;
 588     static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
 589     static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
 590     static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
 591     /* on Windows, this value changes every time the user logs on */
 592     static const unsigned int logon_subauth[] = { SECURITY_LOGON_IDS_RID, 0, 1 /* FIXME: should be randomly generated when tokens are inherited by new processes */ };
 593     PSID alias_admins_sid;
 594     PSID alias_users_sid;
 595     PSID logon_sid;
 596     /* note: should be the owner specified in the token */
 597     ACL *default_dacl = create_default_dacl( &interactive_sid );
 598
 599     alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
 600                                            alias_admins_subauth );
 601     alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
 602                                           alias_users_subauth );
 603     logon_sid = security_sid_alloc( &nt_authority, sizeof(logon_subauth)/sizeof(logon_subauth[0]),
 604                                     logon_subauth );
 605
 606     if (alias_admins_sid && alias_users_sid && logon_sid && default_dacl)
 607     {
 608         const LUID_AND_ATTRIBUTES admin_privs[] =
 609         {
 610             { SeChangeNotifyPrivilege        , SE_PRIVILEGE_ENABLED },
 611             { SeSecurityPrivilege            , 0                    },
 612             { SeBackupPrivilege              , 0                    },
 613             { SeRestorePrivilege             , 0                    },
 614             { SeSystemtimePrivilege          , 0                    },
 615             { SeShutdownPrivilege            , 0                    },
 616             { SeRemoteShutdownPrivilege      , 0                    },
 617             { SeTakeOwnershipPrivilege       , 0                    },
 618             { SeDebugPrivilege               , 0                    },
 619             { SeSystemEnvironmentPrivilege   , 0                    },
 620             { SeSystemProfilePrivilege       , 0                    },
 621             { SeProfileSingleProcessPrivilege, 0                    },
 622             { SeIncreaseBasePriorityPrivilege, 0                    },
 623             { SeLoadDriverPrivilege          , SE_PRIVILEGE_ENABLED },
 624             { SeCreatePagefilePrivilege      , 0                    },
 625             { SeIncreaseQuotaPrivilege       , 0                    },
 626             { SeUndockPrivilege              , 0                    },
 627             { SeManageVolumePrivilege        , 0                    },
 628             { SeImpersonatePrivilege         , SE_PRIVILEGE_ENABLED },
 629             { SeCreateGlobalPrivilege        , SE_PRIVILEGE_ENABLED },
 630         };
 631         /* note: we don't include non-builtin groups here for the user -
 632          * telling us these is the job of a client-side program */
 633         const SID_AND_ATTRIBUTES admin_groups[] =
 634         {
 635             { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 636             { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 637             { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 638             { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 639             { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
 640             { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 641             { logon_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_LOGON_ID },
 642         };
 643         static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
 644         token = create_token( TRUE, security_unix_uid_to_sid( getuid() ),
 645                             admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
 646                             admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
 647                             default_dacl, admin_source, NULL, -1 );
 648         /* we really need a primary group */
 649         assert( token->primary_group );
 650     }
 651
 652     free( logon_sid );
 653     free( alias_admins_sid );
 654     free( alias_users_sid );
 655     free( default_dacl );
 656
 657     return token;
 658 }
 659
 660 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
 661 {
 662     struct privilege *privilege;
 663     LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
 664     {
 665         if (is_equal_luid( luid, &privilege->luid ))
 666         {
 667             if (enabled_only && !privilege->enabled)
 668                 return NULL;
 669             return privilege;
 670         }
 671     }
 672     return NULL;
 673 }
 674
 675 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
 676                                              unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
 677                                              unsigned int mod_privs_count )
 678 {
 679     unsigned int i, modified_count = 0;
 680
 681     /* mark as modified */
 682     allocate_luid( &token->modified_id );
 683
 684     for (i = 0; i < count; i++)
 685     {
 686         struct privilege *privilege =
 687             token_find_privilege( token, &privs[i].Luid, FALSE );
 688         if (!privilege)
 689         {
 690             set_error( STATUS_NOT_ALL_ASSIGNED );
 691             continue;
 692         }
 693
 694         if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
 695             privilege_remove( privilege );
 696         else
 697         {
 698             /* save previous state for caller */
 699             if (mod_privs_count)
 700             {
 701                 luid_and_attr_from_privilege(mod_privs, privilege);
 702                 mod_privs++;
 703                 mod_privs_count--;
 704                 modified_count++;
 705             }
 706
 707             if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
 708                 privilege->enabled = TRUE;
 709             else
 710                 privilege->enabled = FALSE;
 711         }
 712     }
 713     return modified_count;
 714 }
 715
 716 static void token_disable_privileges( struct token *token )
 717 {
 718     struct privilege *privilege;
 719
 720     /* mark as modified */
 721     allocate_luid( &token->modified_id );
 722
 723     LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
 724         privilege->enabled = FALSE;
 725 }
 726
 727 int token_check_privileges( struct token *token, int all_required,
 728                             const LUID_AND_ATTRIBUTES *reqprivs,
 729                             unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
 730 {
 731     unsigned int i, enabled_count = 0;
 732
 733     for (i = 0; i < count; i++)
 734     {
 735         struct privilege *privilege =
 736             token_find_privilege( token, &reqprivs[i].Luid, TRUE );
 737
 738         if (usedprivs)
 739             usedprivs[i] = reqprivs[i];
 740
 741         if (privilege && privilege->enabled)
 742         {
 743             enabled_count++;
 744             if (usedprivs)
 745                 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
 746         }
 747     }
 748
 749     if (all_required)
 750         return (enabled_count == count);
 751     else
 752         return (enabled_count > 0);
 753 }
 754
 755 static int token_sid_present( struct token *token, const SID *sid, int deny )
 756 {
 757     struct group *group;
 758
 759     if (security_equal_sid( token->user, sid )) return TRUE;
 760
 761     LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
 762     {
 763         if (!group->enabled) continue;
 764         if (group->deny_only && !deny) continue;
 765
 766         if (security_equal_sid( &group->sid, sid )) return TRUE;
 767     }
 768
 769     return FALSE;
 770 }
 771
 772 /* Checks access to a security descriptor. 'sd' must have been validated by
 773  * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
 774  * the reason. 'status' parameter will indicate if access is granted or denied.
 775  *
 776  * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
 777  */
 778 static unsigned int token_access_check( struct token *token,
 779                                  const struct security_descriptor *sd,
 780                                  unsigned int desired_access,
 781                                  LUID_AND_ATTRIBUTES *privs,
 782                                  unsigned int *priv_count,
 783                                  const GENERIC_MAPPING *mapping,
 784                                  unsigned int *granted_access,
 785                                  unsigned int *status )
 786 {
 787     unsigned int current_access = 0;
 788     unsigned int denied_access = 0;
 789     ULONG i;
 790     const ACL *dacl;
 791     int dacl_present;
 792     const ACE_HEADER *ace;
 793     const SID *owner;
 794
 795     /* assume no access rights */
 796     *granted_access = 0;
 797
 798     /* fail if desired_access contains generic rights */
 799     if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
 800     {
 801         *priv_count = 0;
 802         return STATUS_GENERIC_NOT_MAPPED;
 803     }
 804
 805     dacl = sd_get_dacl( sd, &dacl_present );
 806     owner = sd_get_owner( sd );
 807     if (!owner || !sd_get_group( sd ))
 808     {
 809         *priv_count = 0;
 810         return STATUS_INVALID_SECURITY_DESCR;
 811     }
 812
 813     /* 1: Grant desired access if the object is unprotected */
 814     if (!dacl_present)
 815     {
 816         *priv_count = 0;
 817         *granted_access = desired_access;
 818         return *status = STATUS_SUCCESS;
 819     }
 820     if (!dacl)
 821     {
 822         *priv_count = 0;
 823         *status = STATUS_ACCESS_DENIED;
 824         return STATUS_SUCCESS;
 825     }
 826
 827     /* 2: Check if caller wants access to system security part. Note: access
 828      * is only granted if specifically asked for */
 829     if (desired_access & ACCESS_SYSTEM_SECURITY)
 830     {
 831         const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
 832         LUID_AND_ATTRIBUTES retpriv = security_priv;
 833         if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
 834         {
 835             if (priv_count)
 836             {
 837                 /* assumes that there will only be one privilege to return */
 838                 if (*priv_count >= 1)
 839                 {
 840                     *priv_count = 1;
 841                     *privs = retpriv;
 842                 }
 843                 else
 844                 {
 845                     *priv_count = 1;
 846                     return STATUS_BUFFER_TOO_SMALL;
 847                 }
 848             }
 849             current_access |= ACCESS_SYSTEM_SECURITY;
 850             if (desired_access == current_access)
 851             {
 852                 *granted_access = current_access;
 853                 return *status = STATUS_SUCCESS;
 854             }
 855         }
 856         else
 857         {
 858             *priv_count = 0;
 859             *status = STATUS_PRIVILEGE_NOT_HELD;
 860             return STATUS_SUCCESS;
 861         }
 862     }
 863     else if (priv_count) *priv_count = 0;
 864
 865     /* 3: Check whether the token is the owner */
 866     /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
 867      * checked when a "set owner" call is made, overriding the access rights
 868      * determined here. */
 869     if (token_sid_present( token, owner, FALSE ))
 870     {
 871         current_access |= (READ_CONTROL | WRITE_DAC);
 872         if (desired_access == current_access)
 873         {
 874             *granted_access = current_access;
 875             return *status = STATUS_SUCCESS;
 876         }
 877     }
 878
 879     /* 4: Grant rights according to the DACL */
 880     ace = (const ACE_HEADER *)(dacl + 1);
 881     for (i = 0; i < dacl->AceCount; i++)
 882     {
 883         const ACCESS_ALLOWED_ACE *aa_ace;
 884         const ACCESS_DENIED_ACE *ad_ace;
 885         const SID *sid;
 886         switch (ace->AceType)
 887         {
 888         case ACCESS_DENIED_ACE_TYPE:
 889             ad_ace = (const ACCESS_DENIED_ACE *)ace;
 890             sid = (const SID *)&ad_ace->SidStart;
 891             if (token_sid_present( token, sid, TRUE ))
 892             {
 893                 unsigned int access = ad_ace->Mask;
 894                 map_generic_mask(&access, mapping);
 895                 if (desired_access & MAXIMUM_ALLOWED)
 896                     denied_access |= access;
 897                 else
 898                 {
 899                     denied_access |= (access & ~current_access);
 900                     if (desired_access & access) goto done;
 901                 }
 902             }
 903             break;
 904         case ACCESS_ALLOWED_ACE_TYPE:
 905             aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
 906             sid = (const SID *)&aa_ace->SidStart;
 907             if (token_sid_present( token, sid, FALSE ))
 908             {
 909                 unsigned int access = aa_ace->Mask;
 910                 map_generic_mask(&access, mapping);
 911                 if (desired_access & MAXIMUM_ALLOWED)
 912                     current_access |= access;
 913                 else
 914                     current_access |= (access & ~denied_access);
 915             }
 916             break;
 917         }
 918
 919         /* don't bother carrying on checking if we've already got all of
 920             * rights we need */
 921         if (desired_access == *granted_access)
 922             break;
 923
 924         ace = ace_next( ace );
 925     }
 926
 927 done:
 928     if (desired_access & MAXIMUM_ALLOWED)
 929         *granted_access = current_access & ~denied_access;
 930     else
 931         if ((current_access & desired_access) == desired_access)
 932             *granted_access = current_access & desired_access;
 933         else
 934             *granted_access = 0;
 935
 936     *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
 937     return STATUS_SUCCESS;
 938 }
 939
 940 const ACL *token_get_default_dacl( struct token *token )
 941 {
 942     return token->default_dacl;
 943 }
 944
 945 const SID *token_get_user( struct token *token )
 946 {
 947     return token->user;
 948 }
 949
 950 const SID *token_get_primary_group( struct token *token )
 951 {
 952     return token->primary_group;
 953 }
 954
 955 int check_object_access(struct object *obj, unsigned int *access)
 956 {
 957     GENERIC_MAPPING mapping;
 958     struct token *token = current->token ? current->token : current->process->token;
 959     LUID_AND_ATTRIBUTES priv;
 960     unsigned int status, priv_count = 1;
 961     int res;
 962
 963     mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );
 964
 965     if (!obj->sd)
 966     {
 967         if (*access & MAXIMUM_ALLOWED)
 968             *access = mapping.GenericAll;
 969         return TRUE;
 970     }
 971
 972     mapping.GenericRead  = obj->ops->map_access( obj, GENERIC_READ );
 973     mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
 974     mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );
 975
 976     res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
 977                               &mapping, access, &status ) == STATUS_SUCCESS &&
 978           status == STATUS_SUCCESS;
 979
 980     if (!res) set_error( STATUS_ACCESS_DENIED );
 981     return res;
 982 }
 983
 984
 985 /* open a security token */
 986 DECL_HANDLER(open_token)
 987 {
 988     if (req->flags & OPEN_TOKEN_THREAD)
 989     {
 990         struct thread *thread = get_thread_from_handle( req->handle, 0 );
 991         if (thread)
 992         {
 993             if (thread->token)
 994             {
 995                 if (thread->token->impersonation_level <= SecurityAnonymous)
 996                     set_error( STATUS_CANT_OPEN_ANONYMOUS );
 997                 else
 998                     reply->token = alloc_handle( current->process, thread->token,
 999                                                  req->access, req->attributes );
1000             }
1001             else
1002                 set_error( STATUS_NO_TOKEN );
1003             release_object( thread );
1004         }
1005     }
1006     else
1007     {
1008         struct process *process = get_process_from_handle( req->handle, 0 );
1009         if (process)
1010         {
1011             if (process->token)
1012                 reply->token = alloc_handle( current->process, process->token, req->access,
1013                                              req->attributes );
1014             else
1015                 set_error( STATUS_NO_TOKEN );
1016             release_object( process );
1017         }
1018     }
1019 }
1020
1021 /* adjust the privileges held by a token */
1022 DECL_HANDLER(adjust_token_privileges)
1023 {
1024     struct token *token;
1025     unsigned int access = TOKEN_ADJUST_PRIVILEGES;
1026
1027     if (req->get_modified_state) access |= TOKEN_QUERY;
1028
1029     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1030                                                  access, &token_ops )))
1031     {
1032         const LUID_AND_ATTRIBUTES *privs = get_req_data();
1033         LUID_AND_ATTRIBUTES *modified_privs = NULL;
1034         unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1035         unsigned int modified_priv_count = 0;
1036
1037         if (req->get_modified_state && !req->disable_all)
1038         {
1039             unsigned int i;
1040             /* count modified privs */
1041             for (i = 0; i < priv_count; i++)
1042             {
1043                 struct privilege *privilege =
1044                     token_find_privilege( token, &privs[i].Luid, FALSE );
1045                 if (privilege && req->get_modified_state)
1046                     modified_priv_count++;
1047             }
1048             reply->len = modified_priv_count;
1049             modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
1050             if (modified_priv_count)
1051                 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
1052         }
1053         reply->len = modified_priv_count * sizeof(*modified_privs);
1054
1055         if (req->disable_all)
1056             token_disable_privileges( token );
1057         else
1058             modified_priv_count = token_adjust_privileges( token, privs,
1059                 priv_count, modified_privs, modified_priv_count );
1060
1061         release_object( token );
1062     }
1063 }
1064
1065 /* retrieves the list of privileges that may be held be the token */
1066 DECL_HANDLER(get_token_privileges)
1067 {
1068     struct token *token;
1069
1070     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1071                                                  TOKEN_QUERY,
1072                                                  &token_ops )))
1073     {
1074         int priv_count = 0;
1075         LUID_AND_ATTRIBUTES *privs;
1076         struct privilege *privilege;
1077
1078         LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1079             priv_count++;
1080
1081         reply->len = priv_count * sizeof(*privs);
1082         if (reply->len <= get_reply_max_size())
1083         {
1084             privs = set_reply_data_size( priv_count * sizeof(*privs) );
1085             if (privs)
1086             {
1087                 int i = 0;
1088                 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1089                 {
1090                     luid_and_attr_from_privilege( &privs[i], privilege );
1091                     i++;
1092                 }
1093             }
1094         }
1095         else
1096             set_error(STATUS_BUFFER_TOO_SMALL);
1097
1098         release_object( token );
1099     }
1100 }
1101
1102 /* creates a duplicate of the token */
1103 DECL_HANDLER(duplicate_token)
1104 {
1105     struct token *src_token;
1106
1107     if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
1108                                                      TOKEN_DUPLICATE,
1109                                                      &token_ops )))
1110     {
1111         struct token *token = token_duplicate( src_token, req->primary, req->impersonation_level );
1112         if (token)
1113         {
1114             reply->new_handle = alloc_handle( current->process, token, req->access, req->attributes);
1115             release_object( token );
1116         }
1117         release_object( src_token );
1118     }
1119 }
1120
1121 /* checks the specified privileges are held by the token */
1122 DECL_HANDLER(check_token_privileges)
1123 {
1124     struct token *token;
1125
1126     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1127                                                  TOKEN_QUERY,
1128                                                  &token_ops )))
1129     {
1130         unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1131
1132         if (!token->primary && token->impersonation_level <= SecurityAnonymous)
1133             set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1134         else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1135         {
1136             LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1137             reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1138         }
1139         else
1140             set_error( STATUS_BUFFER_OVERFLOW );
1141         release_object( token );
1142     }
1143 }
1144
1145 /* checks that a user represented by a token is allowed to access an object
1146  * represented by a security descriptor */
1147 DECL_HANDLER(access_check)
1148 {
1149     data_size_t sd_size = get_req_data_size();
1150     const struct security_descriptor *sd = get_req_data();
1151     struct token *token;
1152
1153     if (!sd_is_valid( sd, sd_size ))
1154     {
1155         set_error( STATUS_ACCESS_VIOLATION );
1156         return;
1157     }
1158
1159     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1160                                                  TOKEN_QUERY,
1161                                                  &token_ops )))
1162     {
1163         GENERIC_MAPPING mapping;
1164         unsigned int status;
1165         LUID_AND_ATTRIBUTES priv;
1166         unsigned int priv_count = 1;
1167
1168         memset(&priv, 0, sizeof(priv));
1169
1170         /* only impersonation tokens may be used with this function */
1171         if (token->primary)
1172         {
1173             set_error( STATUS_NO_IMPERSONATION_TOKEN );
1174             release_object( token );
1175             return;
1176         }
1177         /* anonymous impersonation tokens can't be used */
1178         if (token->impersonation_level <= SecurityAnonymous)
1179         {
1180             set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1181             release_object( token );
1182             return;
1183         }
1184
1185         mapping.GenericRead = req->mapping_read;
1186         mapping.GenericWrite = req->mapping_write;
1187         mapping.GenericExecute = req->mapping_execute;
1188         mapping.GenericAll = req->mapping_all;
1189
1190         status = token_access_check(
1191             token, sd, req->desired_access, &priv, &priv_count, &mapping,
1192             &reply->access_granted, &reply->access_status );
1193
1194         reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1195
1196         if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1197         {
1198             LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1199             memcpy( privs, &priv, sizeof(priv) );
1200         }
1201
1202         set_error( status );
1203         release_object( token );
1204     }
1205 }
1206
1207 /* retrieves the SID of the user that the token represents */
1208 DECL_HANDLER(get_token_user)
1209 {
1210     struct token *token;
1211
1212     reply->user_len = 0;
1213
1214     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1215                                                  TOKEN_QUERY,
1216                                                  &token_ops )))
1217     {
1218         const SID *user = token->user;
1219
1220         reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
1221         if (reply->user_len <= get_reply_max_size())
1222         {
1223             SID *user_reply = set_reply_data_size( reply->user_len );
1224             if (user_reply)
1225                 memcpy( user_reply, user, reply->user_len );
1226         }
1227         else set_error( STATUS_BUFFER_TOO_SMALL );
1228
1229         release_object( token );
1230     }
1231 }
1232
1233 /* retrieves the groups that the user represented by the token belongs to */
1234 DECL_HANDLER(get_token_groups)
1235 {
1236     struct token *token;
1237
1238     reply->user_len = 0;
1239
1240     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1241                                                  TOKEN_QUERY,
1242                                                  &token_ops )))
1243     {
1244         size_t size_needed = sizeof(struct token_groups);
1245         unsigned int group_count = 0;
1246         const struct group *group;
1247
1248         LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1249         {
1250             group_count++;
1251             size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
1252         }
1253         size_needed += sizeof(unsigned int) * group_count;
1254
1255         reply->user_len = size_needed;
1256
1257         if (size_needed <= get_reply_max_size())
1258         {
1259             struct token_groups *tg = set_reply_data_size( size_needed );
1260             if (tg)
1261             {
1262                 unsigned int *attr_ptr = (unsigned int *)(tg + 1);
1263                 SID *sid_ptr = (SID *)(attr_ptr + group_count);
1264
1265                 tg->count = group_count;
1266
1267                 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1268                 {
1269
1270                     *attr_ptr = 0;
1271                     if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
1272                     if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
1273                     if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
1274                     if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
1275                     if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
1276                     if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;
1277
1278                     memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1279
1280                     sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1281                     attr_ptr++;
1282                 }
1283             }
1284         }
1285         else set_error( STATUS_BUFFER_TOO_SMALL );
1286
1287         release_object( token );
1288     }
1289 }
1290
1291 DECL_HANDLER(get_token_impersonation_level)
1292 {
1293     struct token *token;
1294
1295     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1296                                                  TOKEN_QUERY,
1297                                                  &token_ops )))
1298     {
1299         if (token->primary)
1300             set_error( STATUS_INVALID_PARAMETER );
1301         else
1302             reply->impersonation_level = token->impersonation_level;
1303
1304         release_object( token );
1305     }
1306 }
1307
1308 DECL_HANDLER(get_token_statistics)
1309 {
1310     struct token *token;
1311
1312     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1313                                                  TOKEN_QUERY,
1314                                                  &token_ops )))
1315     {
1316         reply->token_id = token->token_id;
1317         reply->modified_id = token->modified_id;
1318         reply->primary = token->primary;
1319         reply->impersonation_level = token->impersonation_level;
1320         reply->group_count = list_count( &token->groups );
1321         reply->privilege_count = list_count( &token->privileges );
1322
1323         release_object( token );
1324     }
1325 }