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
  30 #include "ntstatus.h"
  31 #define WIN32_NO_STATUS
  32 #include "windef.h"
  33 #include "winternl.h"
  34
  35 #include "handle.h"
  36 #include "thread.h"
  37 #include "process.h"
  38 #include "request.h"
  39 #include "security.h"
  40
  41 #include "wine/unicode.h"
  42
  43 #define MAX_SUBAUTH_COUNT 1
  44
  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 };
  65
  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;
  76
  77 static luid_t prev_luid_value = { 1000, 0 };
  78
  79 struct token
  80 {
  81     struct object  obj;             /* object header */
  82     luid_t         token_id;        /* system-unique id of token */
  83     luid_t         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 */
  92 };
  93
  94 struct privilege
  95 {
  96     struct list entry;
  97     LUID        luid;
  98     unsigned    enabled  : 1; /* is the privilege currently enabled? */
  99     unsigned    def      : 1; /* is the privilege enabled by default? */
 100 };
 101
 102 struct group
 103 {
 104     struct list entry;
 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? */
 112     SID         sid;
 113 };
 114
 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 );
 118
 119 static const struct object_ops token_ops =
 120 {
 121     sizeof(struct token),      /* size */
 122     token_dump,                /* dump */
 123     no_add_queue,              /* add_queue */
 124     NULL,                      /* remove_queue */
 125     NULL,                      /* signaled */
 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_open_file,              /* open_file */
 132     no_close_handle,           /* close_handle */
 133     token_destroy              /* destroy */
 134 };
 135
 136
 137 static void token_dump( struct object *obj, int verbose )
 138 {
 139     fprintf( stderr, "Security token\n" );
 140     /* FIXME: dump token members */
 141 }
 142
 143 static unsigned int token_map_access( struct object *obj, unsigned int access )
 144 {
 145     if (access & GENERIC_READ)    access |= TOKEN_READ;
 146     if (access & GENERIC_WRITE)   access |= TOKEN_WRITE;
 147     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
 148     if (access & GENERIC_ALL)     access |= TOKEN_ALL_ACCESS;
 149     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 150 }
 151
 152 static SID *security_sid_alloc( const SID_IDENTIFIER_AUTHORITY *idauthority, int subauthcount, const unsigned int subauth[] )
 153 {
 154     int i;
 155     SID *sid = mem_alloc( FIELD_OFFSET(SID, SubAuthority[subauthcount]) );
 156     if (!sid) return NULL;
 157     sid->Revision = SID_REVISION;
 158     sid->SubAuthorityCount = subauthcount;
 159     sid->IdentifierAuthority = *idauthority;
 160     for (i = 0; i < subauthcount; i++)
 161         sid->SubAuthority[i] = subauth[i];
 162     return sid;
 163 }
 164
 165 static inline int security_equal_sid( const SID *sid1, const SID *sid2 )
 166 {
 167     return ((sid1->SubAuthorityCount == sid2->SubAuthorityCount) &&
 168         !memcmp( sid1, sid2, FIELD_OFFSET(SID, SubAuthority[sid1->SubAuthorityCount]) ));
 169 }
 170
 171 void security_set_thread_token( struct thread *thread, obj_handle_t handle )
 172 {
 173     if (!handle)
 174     {
 175         if (thread->token)
 176             release_object( thread->token );
 177         thread->token = NULL;
 178     }
 179     else
 180     {
 181         struct token *token = (struct token *)get_handle_obj( current->process,
 182                                                               handle,
 183                                                               TOKEN_IMPERSONATE,
 184                                                               &token_ops );
 185         if (token)
 186         {
 187             if (thread->token)
 188                 release_object( thread->token );
 189             thread->token = token;
 190         }
 191     }
 192 }
 193
 194 static const ACE_HEADER *ace_next( const ACE_HEADER *ace )
 195 {
 196     return (const ACE_HEADER *)((const char *)ace + ace->AceSize);
 197 }
 198
 199 static int acl_is_valid( const ACL *acl, data_size_t size )
 200 {
 201     ULONG i;
 202     const ACE_HEADER *ace;
 203
 204     if (size < sizeof(ACL))
 205         return FALSE;
 206
 207     size = min(size, MAX_ACL_LEN);
 208
 209     size -= sizeof(ACL);
 210
 211     ace = (const ACE_HEADER *)(acl + 1);
 212     for (i = 0; i < acl->AceCount; i++)
 213     {
 214         const SID *sid;
 215         data_size_t sid_size;
 216
 217         if (size < sizeof(ACE_HEADER))
 218             return FALSE;
 219         if (size < ace->AceSize)
 220             return FALSE;
 221         size -= ace->AceSize;
 222         switch (ace->AceType)
 223         {
 224         case ACCESS_DENIED_ACE_TYPE:
 225             sid = (const SID *)&((const ACCESS_DENIED_ACE *)ace)->SidStart;
 226             sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart);
 227             break;
 228         case ACCESS_ALLOWED_ACE_TYPE:
 229             sid = (const SID *)&((const ACCESS_ALLOWED_ACE *)ace)->SidStart;
 230             sid_size = ace->AceSize - FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart);
 231             break;
 232         case SYSTEM_AUDIT_ACE_TYPE:
 233             sid = (const SID *)&((const SYSTEM_AUDIT_ACE *)ace)->SidStart;
 234             sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_AUDIT_ACE, SidStart);
 235             break;
 236         case SYSTEM_ALARM_ACE_TYPE:
 237             sid = (const SID *)&((const SYSTEM_ALARM_ACE *)ace)->SidStart;
 238             sid_size = ace->AceSize - FIELD_OFFSET(SYSTEM_ALARM_ACE, SidStart);
 239             break;
 240         default:
 241             return FALSE;
 242         }
 243         if (sid_size < FIELD_OFFSET(SID, SubAuthority[0]) ||
 244             sid_size < FIELD_OFFSET(SID, SubAuthority[sid->SubAuthorityCount]))
 245             return FALSE;
 246         ace = ace_next( ace );
 247     }
 248     return TRUE;
 249 }
 250
 251 /* gets the discretionary access control list from a security descriptor */
 252 static inline const ACL *sd_get_dacl( const struct security_descriptor *sd, int *present )
 253 {
 254     *present = (sd->control & SE_DACL_PRESENT ? TRUE : FALSE);
 255
 256     if (sd->dacl_len)
 257         return (const ACL *)((const char *)(sd + 1) +
 258             sd->owner_len + sd->group_len + sd->sacl_len);
 259     else
 260         return NULL;
 261 }
 262
 263 /* gets the system access control list from a security descriptor */
 264 static inline const ACL *sd_get_sacl( const struct security_descriptor *sd, int *present )
 265 {
 266     *present = (sd->control & SE_SACL_PRESENT ? TRUE : FALSE);
 267
 268     if (sd->sacl_len)
 269         return (const ACL *)((const char *)(sd + 1) +
 270             sd->owner_len + sd->group_len);
 271     else
 272         return NULL;
 273 }
 274
 275 /* gets the owner from a security descriptor */
 276 static inline const SID *sd_get_owner( const struct security_descriptor *sd )
 277 {
 278     if (sd->owner_len)
 279         return (const SID *)(sd + 1);
 280     else
 281         return NULL;
 282 }
 283
 284 /* gets the primary group from a security descriptor */
 285 static inline const SID *sd_get_group( const struct security_descriptor *sd )
 286 {
 287     if (sd->group_len)
 288         return (const SID *)((const char *)(sd + 1) + sd->owner_len);
 289     else
 290         return NULL;
 291 }
 292
 293 /* checks whether all members of a security descriptor fit inside the size
 294  * of memory specified */
 295 static int sd_is_valid( const struct security_descriptor *sd, data_size_t size )
 296 {
 297     size_t offset = sizeof(struct security_descriptor);
 298     const SID *group;
 299     const SID *owner;
 300     const ACL *sacl;
 301     const ACL *dacl;
 302     int dummy;
 303
 304     if (size < offset)
 305         return FALSE;
 306
 307     if ((sd->owner_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
 308         (offset + sd->owner_len > size))
 309         return FALSE;
 310     owner = sd_get_owner( sd );
 311     if (owner)
 312     {
 313         size_t needed_size = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
 314         if ((sd->owner_len < sizeof(SID)) || (needed_size > sd->owner_len))
 315             return FALSE;
 316     }
 317     offset += sd->owner_len;
 318
 319     if ((sd->group_len >= FIELD_OFFSET(SID, SubAuthority[255])) ||
 320         (offset + sd->group_len > size))
 321         return FALSE;
 322     group = sd_get_group( sd );
 323     if (group)
 324     {
 325         size_t needed_size = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
 326         if ((sd->group_len < sizeof(SID)) || (needed_size > sd->group_len))
 327             return FALSE;
 328     }
 329     offset += sd->group_len;
 330
 331     if ((sd->sacl_len >= MAX_ACL_LEN) || (offset + sd->sacl_len > size))
 332         return FALSE;
 333     sacl = sd_get_sacl( sd, &dummy );
 334     if (sacl && !acl_is_valid( sacl, sd->sacl_len ))
 335         return FALSE;
 336     offset += sd->sacl_len;
 337
 338     if ((sd->dacl_len >= MAX_ACL_LEN) || (offset + sd->dacl_len > size))
 339         return FALSE;
 340     dacl = sd_get_dacl( sd, &dummy );
 341     if (dacl && !acl_is_valid( dacl, sd->dacl_len ))
 342         return FALSE;
 343     offset += sd->dacl_len;
 344
 345     return TRUE;
 346 }
 347
 348 /* maps from generic rights to specific rights as given by a mapping */
 349 static inline void map_generic_mask(unsigned int *mask, const GENERIC_MAPPING *mapping)
 350 {
 351     if (*mask & GENERIC_READ) *mask |= mapping->GenericRead;
 352     if (*mask & GENERIC_WRITE) *mask |= mapping->GenericWrite;
 353     if (*mask & GENERIC_EXECUTE) *mask |= mapping->GenericExecute;
 354     if (*mask & GENERIC_ALL) *mask |= mapping->GenericAll;
 355     *mask &= 0x0FFFFFFF;
 356 }
 357
 358 static inline int is_equal_luid( const LUID *luid1, const LUID *luid2 )
 359 {
 360     return (luid1->LowPart == luid2->LowPart && luid1->HighPart == luid2->HighPart);
 361 }
 362
 363 static inline void allocate_luid( luid_t *luid )
 364 {
 365     prev_luid_value.low_part++;
 366     *luid = prev_luid_value;
 367 }
 368
 369 DECL_HANDLER( allocate_locally_unique_id )
 370 {
 371     allocate_luid( &reply->luid );
 372 }
 373
 374 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES *out, const struct privilege *in)
 375 {
 376     out->Luid = in->luid;
 377     out->Attributes =
 378         (in->enabled ? SE_PRIVILEGE_ENABLED : 0) |
 379         (in->def ? SE_PRIVILEGE_ENABLED_BY_DEFAULT : 0);
 380 }
 381
 382 static struct privilege *privilege_add( struct token *token, const LUID *luid, int enabled )
 383 {
 384     struct privilege *privilege = mem_alloc( sizeof(*privilege) );
 385     if (privilege)
 386     {
 387         privilege->luid = *luid;
 388         privilege->def = privilege->enabled = (enabled != 0);
 389         list_add_tail( &token->privileges, &privilege->entry );
 390     }
 391     return privilege;
 392 }
 393
 394 static inline void privilege_remove( struct privilege *privilege )
 395 {
 396     list_remove( &privilege->entry );
 397     free( privilege );
 398 }
 399
 400 static void token_destroy( struct object *obj )
 401 {
 402     struct token* token;
 403     struct list *cursor, *cursor_next;
 404
 405     assert( obj->ops == &token_ops );
 406     token = (struct token *)obj;
 407
 408     free( token->user );
 409
 410     LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->privileges )
 411     {
 412         struct privilege *privilege = LIST_ENTRY( cursor, struct privilege, entry );
 413         privilege_remove( privilege );
 414     }
 415
 416     LIST_FOR_EACH_SAFE( cursor, cursor_next, &token->groups )
 417     {
 418         struct group *group = LIST_ENTRY( cursor, struct group, entry );
 419         list_remove( &group->entry );
 420         free( group );
 421     }
 422
 423     free( token->default_dacl );
 424 }
 425
 426 /* creates a new token.
 427  *  groups may be NULL if group_count is 0.
 428  *  privs may be NULL if priv_count is 0.
 429  *  default_dacl may be NULL, indicating that all objects created by the user
 430  *   are unsecured.
 431  *  modified_id may be NULL, indicating that a new modified_id luid should be
 432  *   allocated.
 433  */
 434 static struct token *create_token( unsigned primary, const SID *user,
 435                                    const SID_AND_ATTRIBUTES *groups, unsigned int group_count,
 436                                    const LUID_AND_ATTRIBUTES *privs, unsigned int priv_count,
 437                                    const ACL *default_dacl, TOKEN_SOURCE source,
 438                                    const luid_t *modified_id,
 439                                    SECURITY_IMPERSONATION_LEVEL impersonation_level )
 440 {
 441     struct token *token = alloc_object( &token_ops );
 442     if (token)
 443     {
 444         unsigned int i;
 445
 446         allocate_luid( &token->token_id );
 447         if (modified_id)
 448             token->modified_id = *modified_id;
 449         else
 450             allocate_luid( &token->modified_id );
 451         list_init( &token->privileges );
 452         list_init( &token->groups );
 453         token->primary = primary;
 454         /* primary tokens don't have impersonation levels */
 455         if (primary)
 456             token->impersonation_level = -1;
 457         else
 458             token->impersonation_level = impersonation_level;
 459         token->default_dacl = NULL;
 460         token->primary_group = NULL;
 461
 462         /* copy user */
 463         token->user = memdup( user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
 464         if (!token->user)
 465         {
 466             release_object( token );
 467             return NULL;
 468         }
 469
 470         /* copy groups */
 471         for (i = 0; i < group_count; i++)
 472         {
 473             size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] );
 474             struct group *group = mem_alloc( size );
 475
 476             if (!group)
 477             {
 478                 release_object( token );
 479                 return NULL;
 480             }
 481             memcpy( &group->sid, groups[i].Sid, FIELD_OFFSET( SID, SubAuthority[((const SID *)groups[i].Sid)->SubAuthorityCount] ) );
 482             group->enabled = TRUE;
 483             group->def = TRUE;
 484             group->logon = FALSE;
 485             group->mandatory = (groups[i].Attributes & SE_GROUP_MANDATORY) ? TRUE : FALSE;
 486             group->owner = groups[i].Attributes & SE_GROUP_OWNER ? TRUE : FALSE;
 487             group->resource = FALSE;
 488             group->deny_only = FALSE;
 489             list_add_tail( &token->groups, &group->entry );
 490             /* Use first owner capable group as an owner */
 491             if (!token->primary_group && group->owner)
 492                 token->primary_group = &group->sid;
 493         }
 494
 495         /* copy privileges */
 496         for (i = 0; i < priv_count; i++)
 497         {
 498             /* note: we don't check uniqueness: the caller must make sure
 499              * privs doesn't contain any duplicate luids */
 500             if (!privilege_add( token, &privs[i].Luid,
 501                                 privs[i].Attributes & SE_PRIVILEGE_ENABLED ))
 502             {
 503                 release_object( token );
 504                 return NULL;
 505             }
 506         }
 507
 508         if (default_dacl)
 509         {
 510             token->default_dacl = memdup( default_dacl, default_dacl->AclSize );
 511             if (!token->default_dacl)
 512             {
 513                 release_object( token );
 514                 return NULL;
 515             }
 516         }
 517
 518         token->source = source;
 519     }
 520     return token;
 521 }
 522
 523 static ACL *create_default_dacl( const SID *user )
 524 {
 525     ACCESS_ALLOWED_ACE *aaa;
 526     ACL *default_dacl;
 527     SID *sid;
 528     size_t default_dacl_size = sizeof(ACL) +
 529                                2*(sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
 530                                sizeof(local_system_sid) +
 531                                FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
 532
 533     default_dacl = mem_alloc( default_dacl_size );
 534     if (!default_dacl) return NULL;
 535
 536     default_dacl->AclRevision = MAX_ACL_REVISION;
 537     default_dacl->Sbz1 = 0;
 538     default_dacl->AclSize = default_dacl_size;
 539     default_dacl->AceCount = 2;
 540     default_dacl->Sbz2 = 0;
 541
 542     /* GENERIC_ALL for Local System */
 543     aaa = (ACCESS_ALLOWED_ACE *)(default_dacl + 1);
 544     aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 545     aaa->Header.AceFlags = 0;
 546     aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
 547                           sizeof(local_system_sid);
 548     aaa->Mask = GENERIC_ALL;
 549     sid = (SID *)&aaa->SidStart;
 550     memcpy( sid, &local_system_sid, sizeof(local_system_sid) );
 551
 552     /* GENERIC_ALL for specified user */
 553     aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
 554     aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 555     aaa->Header.AceFlags = 0;
 556     aaa->Header.AceSize = (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) +
 557                           FIELD_OFFSET( SID, SubAuthority[user->SubAuthorityCount] );
 558     aaa->Mask = GENERIC_ALL;
 559     sid = (SID *)&aaa->SidStart;
 560     memcpy( sid, user, FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]) );
 561
 562     return default_dacl;
 563 }
 564
 565 struct sid_data
 566 {
 567     SID_IDENTIFIER_AUTHORITY idauth;
 568     int count;
 569     unsigned int subauth[MAX_SUBAUTH_COUNT];
 570 };
 571
 572 struct token *token_create_admin( void )
 573 {
 574     struct token *token = NULL;
 575     static const SID_IDENTIFIER_AUTHORITY nt_authority = { SECURITY_NT_AUTHORITY };
 576     static const unsigned int alias_admins_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS };
 577     static const unsigned int alias_users_subauth[] = { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS };
 578     PSID alias_admins_sid;
 579     PSID alias_users_sid;
 580     /* note: should be the owner specified in the token */
 581     ACL *default_dacl = create_default_dacl( &interactive_sid );
 582
 583     alias_admins_sid = security_sid_alloc( &nt_authority, sizeof(alias_admins_subauth)/sizeof(alias_admins_subauth[0]),
 584                                            alias_admins_subauth );
 585     alias_users_sid = security_sid_alloc( &nt_authority, sizeof(alias_users_subauth)/sizeof(alias_users_subauth[0]),
 586                                           alias_users_subauth );
 587
 588     if (alias_admins_sid && alias_users_sid && default_dacl)
 589     {
 590         const LUID_AND_ATTRIBUTES admin_privs[] =
 591         {
 592             { SeChangeNotifyPrivilege        , SE_PRIVILEGE_ENABLED },
 593             { SeSecurityPrivilege            , 0                    },
 594             { SeBackupPrivilege              , 0                    },
 595             { SeRestorePrivilege             , 0                    },
 596             { SeSystemtimePrivilege          , 0                    },
 597             { SeShutdownPrivilege            , 0                    },
 598             { SeRemoteShutdownPrivilege      , 0                    },
 599             { SeTakeOwnershipPrivilege       , 0                    },
 600             { SeDebugPrivilege               , 0                    },
 601             { SeSystemEnvironmentPrivilege   , 0                    },
 602             { SeSystemProfilePrivilege       , 0                    },
 603             { SeProfileSingleProcessPrivilege, 0                    },
 604             { SeIncreaseBasePriorityPrivilege, 0                    },
 605             { SeLoadDriverPrivilege          , 0                    },
 606             { SeCreatePagefilePrivilege      , 0                    },
 607             { SeIncreaseQuotaPrivilege       , 0                    },
 608             { SeUndockPrivilege              , 0                    },
 609             { SeManageVolumePrivilege        , 0                    },
 610             { SeImpersonatePrivilege         , SE_PRIVILEGE_ENABLED },
 611             { SeCreateGlobalPrivilege        , SE_PRIVILEGE_ENABLED },
 612         };
 613         /* note: we don't include non-builtin groups here for the user -
 614          * telling us these is the job of a client-side program */
 615         const SID_AND_ATTRIBUTES admin_groups[] =
 616         {
 617             { security_world_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 618             { security_local_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 619             { security_interactive_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 620             { security_authenticated_user_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 621             { alias_admins_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY|SE_GROUP_OWNER },
 622             { alias_users_sid, SE_GROUP_ENABLED|SE_GROUP_ENABLED_BY_DEFAULT|SE_GROUP_MANDATORY },
 623         };
 624         static const TOKEN_SOURCE admin_source = {"SeMgr", {0, 0}};
 625         /* note: we just set the user sid to be the interactive builtin sid -
 626          * we should really translate the UNIX user id to a sid */
 627         token = create_token( TRUE, &interactive_sid,
 628                             admin_groups, sizeof(admin_groups)/sizeof(admin_groups[0]),
 629                             admin_privs, sizeof(admin_privs)/sizeof(admin_privs[0]),
 630                             default_dacl, admin_source, NULL, -1 );
 631         /* we really need a primary group */
 632         assert( token->primary_group );
 633     }
 634
 635     free( alias_admins_sid );
 636     free( alias_users_sid );
 637     free( default_dacl );
 638
 639     return token;
 640 }
 641
 642 static struct privilege *token_find_privilege( struct token *token, const LUID *luid, int enabled_only )
 643 {
 644     struct privilege *privilege;
 645     LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
 646     {
 647         if (is_equal_luid( luid, &privilege->luid ))
 648         {
 649             if (enabled_only && !privilege->enabled)
 650                 return NULL;
 651             return privilege;
 652         }
 653     }
 654     return NULL;
 655 }
 656
 657 static unsigned int token_adjust_privileges( struct token *token, const LUID_AND_ATTRIBUTES *privs,
 658                                              unsigned int count, LUID_AND_ATTRIBUTES *mod_privs,
 659                                              unsigned int mod_privs_count )
 660 {
 661     unsigned int i, modified_count = 0;
 662
 663     /* mark as modified */
 664     allocate_luid( &token->modified_id );
 665
 666     for (i = 0; i < count; i++)
 667     {
 668         struct privilege *privilege =
 669             token_find_privilege( token, &privs[i].Luid, FALSE );
 670         if (!privilege)
 671         {
 672             set_error( STATUS_NOT_ALL_ASSIGNED );
 673             continue;
 674         }
 675
 676         if (privs[i].Attributes & SE_PRIVILEGE_REMOVE)
 677             privilege_remove( privilege );
 678         else
 679         {
 680             /* save previous state for caller */
 681             if (mod_privs_count)
 682             {
 683                 luid_and_attr_from_privilege(mod_privs, privilege);
 684                 mod_privs++;
 685                 mod_privs_count--;
 686                 modified_count++;
 687             }
 688
 689             if (privs[i].Attributes & SE_PRIVILEGE_ENABLED)
 690                 privilege->enabled = TRUE;
 691             else
 692                 privilege->enabled = FALSE;
 693         }
 694     }
 695     return modified_count;
 696 }
 697
 698 static void token_disable_privileges( struct token *token )
 699 {
 700     struct privilege *privilege;
 701
 702     /* mark as modified */
 703     allocate_luid( &token->modified_id );
 704
 705     LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
 706         privilege->enabled = FALSE;
 707 }
 708
 709 int token_check_privileges( struct token *token, int all_required,
 710                             const LUID_AND_ATTRIBUTES *reqprivs,
 711                             unsigned int count, LUID_AND_ATTRIBUTES *usedprivs)
 712 {
 713     unsigned int i, enabled_count = 0;
 714
 715     for (i = 0; i < count; i++)
 716     {
 717         struct privilege *privilege =
 718             token_find_privilege( token, &reqprivs[i].Luid, TRUE );
 719
 720         if (usedprivs)
 721             usedprivs[i] = reqprivs[i];
 722
 723         if (privilege && privilege->enabled)
 724         {
 725             enabled_count++;
 726             if (usedprivs)
 727                 usedprivs[i].Attributes |= SE_PRIVILEGE_USED_FOR_ACCESS;
 728         }
 729     }
 730
 731     if (all_required)
 732         return (enabled_count == count);
 733     else
 734         return (enabled_count > 0);
 735 }
 736
 737 static int token_sid_present( struct token *token, const SID *sid, int deny )
 738 {
 739     struct group *group;
 740
 741     if (security_equal_sid( token->user, sid )) return TRUE;
 742
 743     LIST_FOR_EACH_ENTRY( group, &token->groups, struct group, entry )
 744     {
 745         if (!group->enabled) continue;
 746         if (group->deny_only && !deny) continue;
 747
 748         if (security_equal_sid( &group->sid, sid )) return TRUE;
 749     }
 750
 751     return FALSE;
 752 }
 753
 754 /* Checks access to a security descriptor. 'sd' must have been validated by
 755  * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
 756  * the reason. 'status' parameter will indicate if access is granted or denied.
 757  *
 758  * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
 759  */
 760 static unsigned int token_access_check( struct token *token,
 761                                  const struct security_descriptor *sd,
 762                                  unsigned int desired_access,
 763                                  LUID_AND_ATTRIBUTES *privs,
 764                                  unsigned int *priv_count,
 765                                  const GENERIC_MAPPING *mapping,
 766                                  unsigned int *granted_access,
 767                                  unsigned int *status )
 768 {
 769     unsigned int current_access = 0;
 770     unsigned int denied_access = 0;
 771     ULONG i;
 772     const ACL *dacl;
 773     int dacl_present;
 774     const ACE_HEADER *ace;
 775     const SID *owner;
 776
 777     /* assume no access rights */
 778     *granted_access = 0;
 779
 780     /* fail if desired_access contains generic rights */
 781     if (desired_access & (GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE|GENERIC_ALL))
 782     {
 783         *priv_count = 0;
 784         return STATUS_GENERIC_NOT_MAPPED;
 785     }
 786
 787     dacl = sd_get_dacl( sd, &dacl_present );
 788     owner = sd_get_owner( sd );
 789     if (!owner || !sd_get_group( sd ))
 790     {
 791         *priv_count = 0;
 792         return STATUS_INVALID_SECURITY_DESCR;
 793     }
 794
 795     /* 1: Grant desired access if the object is unprotected */
 796     if (!dacl_present)
 797     {
 798         *priv_count = 0;
 799         *granted_access = desired_access;
 800         return *status = STATUS_SUCCESS;
 801     }
 802     if (!dacl)
 803     {
 804         *priv_count = 0;
 805         *status = STATUS_ACCESS_DENIED;
 806         return STATUS_SUCCESS;
 807     }
 808
 809     /* 2: Check if caller wants access to system security part. Note: access
 810      * is only granted if specifically asked for */
 811     if (desired_access & ACCESS_SYSTEM_SECURITY)
 812     {
 813         const LUID_AND_ATTRIBUTES security_priv = { SeSecurityPrivilege, 0 };
 814         LUID_AND_ATTRIBUTES retpriv = security_priv;
 815         if (token_check_privileges( token, TRUE, &security_priv, 1, &retpriv ))
 816         {
 817             if (priv_count)
 818             {
 819                 /* assumes that there will only be one privilege to return */
 820                 if (*priv_count >= 1)
 821                 {
 822                     *priv_count = 1;
 823                     *privs = retpriv;
 824                 }
 825                 else
 826                 {
 827                     *priv_count = 1;
 828                     return STATUS_BUFFER_TOO_SMALL;
 829                 }
 830             }
 831             current_access |= ACCESS_SYSTEM_SECURITY;
 832             if (desired_access == current_access)
 833             {
 834                 *granted_access = current_access;
 835                 return *status = STATUS_SUCCESS;
 836             }
 837         }
 838         else
 839         {
 840             *priv_count = 0;
 841             *status = STATUS_PRIVILEGE_NOT_HELD;
 842             return STATUS_SUCCESS;
 843         }
 844     }
 845     else if (priv_count) *priv_count = 0;
 846
 847     /* 3: Check whether the token is the owner */
 848     /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
 849      * checked when a "set owner" call is made, overriding the access rights
 850      * determined here. */
 851     if (token_sid_present( token, owner, FALSE ))
 852     {
 853         current_access |= (READ_CONTROL | WRITE_DAC);
 854         if (desired_access == current_access)
 855         {
 856             *granted_access = current_access;
 857             return *status = STATUS_SUCCESS;
 858         }
 859     }
 860
 861     /* 4: Grant rights according to the DACL */
 862     ace = (const ACE_HEADER *)(dacl + 1);
 863     for (i = 0; i < dacl->AceCount; i++)
 864     {
 865         const ACCESS_ALLOWED_ACE *aa_ace;
 866         const ACCESS_DENIED_ACE *ad_ace;
 867         const SID *sid;
 868         switch (ace->AceType)
 869         {
 870         case ACCESS_DENIED_ACE_TYPE:
 871             ad_ace = (const ACCESS_DENIED_ACE *)ace;
 872             sid = (const SID *)&ad_ace->SidStart;
 873             if (token_sid_present( token, sid, TRUE ))
 874             {
 875                 unsigned int access = ad_ace->Mask;
 876                 map_generic_mask(&access, mapping);
 877                 if (desired_access & MAXIMUM_ALLOWED)
 878                     denied_access |= access;
 879                 else
 880                 {
 881                     denied_access |= (access & ~current_access);
 882                     if (desired_access & access) goto done;
 883                 }
 884             }
 885             break;
 886         case ACCESS_ALLOWED_ACE_TYPE:
 887             aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
 888             sid = (const SID *)&aa_ace->SidStart;
 889             if (token_sid_present( token, sid, FALSE ))
 890             {
 891                 unsigned int access = aa_ace->Mask;
 892                 map_generic_mask(&access, mapping);
 893                 if (desired_access & MAXIMUM_ALLOWED)
 894                     current_access |= access;
 895                 else
 896                     current_access |= (access & ~denied_access);
 897             }
 898             break;
 899         }
 900
 901         /* don't bother carrying on checking if we've already got all of
 902             * rights we need */
 903         if (desired_access == *granted_access)
 904             break;
 905
 906         ace = ace_next( ace );
 907     }
 908
 909 done:
 910     if (desired_access & MAXIMUM_ALLOWED)
 911         *granted_access = current_access & ~denied_access;
 912     else
 913         if ((current_access & desired_access) == desired_access)
 914             *granted_access = current_access & desired_access;
 915         else
 916             *granted_access = 0;
 917
 918     *status = *granted_access ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
 919     return STATUS_SUCCESS;
 920 }
 921
 922 const ACL *token_get_default_dacl( struct token *token )
 923 {
 924     return token->default_dacl;
 925 }
 926
 927 static void set_object_sd( struct object *obj, const struct security_descriptor *sd,
 928                            unsigned int set_info )
 929 {
 930     struct security_descriptor new_sd, *pnew_sd;
 931     int present;
 932     const SID *owner, *group;
 933     const ACL *sacl, *dacl;
 934     char *ptr;
 935
 936     if (!set_info) return;
 937
 938     new_sd.control = sd->control & ~SE_SELF_RELATIVE;
 939
 940     owner = sd_get_owner( sd );
 941     if (set_info & OWNER_SECURITY_INFORMATION && owner)
 942         new_sd.owner_len = sd->owner_len;
 943     else
 944     {
 945         owner = current->process->token->user;
 946         new_sd.owner_len = FIELD_OFFSET(SID, SubAuthority[owner->SubAuthorityCount]);
 947         new_sd.control |= SE_OWNER_DEFAULTED;
 948     }
 949
 950     group = sd_get_group( sd );
 951     if (set_info & GROUP_SECURITY_INFORMATION && group)
 952         new_sd.group_len = sd->group_len;
 953     else
 954     {
 955         group = current->process->token->primary_group;
 956         new_sd.group_len = FIELD_OFFSET(SID, SubAuthority[group->SubAuthorityCount]);
 957         new_sd.control |= SE_GROUP_DEFAULTED;
 958     }
 959
 960     new_sd.control |= SE_SACL_PRESENT;
 961     sacl = sd_get_sacl( sd, &present );
 962     if (set_info & SACL_SECURITY_INFORMATION && present)
 963         new_sd.sacl_len = sd->sacl_len;
 964     else
 965     {
 966         if (obj->sd) sacl = sd_get_sacl( obj->sd, &present );
 967
 968         if (obj->sd && present)
 969             new_sd.sacl_len = obj->sd->sacl_len;
 970         else
 971         {
 972             new_sd.sacl_len = 0;
 973             new_sd.control |= SE_SACL_DEFAULTED;
 974         }
 975     }
 976
 977     new_sd.control |= SE_DACL_PRESENT;
 978     dacl = sd_get_dacl( sd, &present );
 979     if (set_info & DACL_SECURITY_INFORMATION && present)
 980         new_sd.dacl_len = sd->dacl_len;
 981     else
 982     {
 983         if (obj->sd) dacl = sd_get_dacl( obj->sd, &present );
 984
 985         if (obj->sd && present)
 986             new_sd.dacl_len = obj->sd->dacl_len;
 987         else
 988         {
 989             dacl = token_get_default_dacl( current->process->token );
 990             new_sd.dacl_len = dacl->AclSize;
 991             new_sd.control |= SE_DACL_DEFAULTED;
 992         }
 993     }
 994
 995     ptr = mem_alloc( sizeof(new_sd) + new_sd.owner_len + new_sd.group_len +
 996                      new_sd.sacl_len + new_sd.dacl_len );
 997     if (!ptr) return;
 998     pnew_sd = (struct security_descriptor*)ptr;
 999
1000     memcpy( ptr, &new_sd, sizeof(new_sd) );
1001     ptr += sizeof(new_sd);
1002     memcpy( ptr, owner, new_sd.owner_len );
1003     ptr += new_sd.owner_len;
1004     memcpy( ptr, group, new_sd.group_len );
1005     ptr += new_sd.group_len;
1006     memcpy( ptr, sacl, new_sd.sacl_len );
1007     ptr += new_sd.sacl_len;
1008     memcpy( ptr, dacl, new_sd.dacl_len );
1009
1010     free( obj->sd );
1011     obj->sd = pnew_sd;
1012 }
1013
1014 int check_object_access(struct object *obj, unsigned int *access)
1015 {
1016     GENERIC_MAPPING mapping;
1017     struct token *token = current->token ? current->token : current->process->token;
1018     LUID_AND_ATTRIBUTES priv;
1019     unsigned int status, priv_count = 1;
1020     int res;
1021
1022     mapping.GenericAll = obj->ops->map_access( obj, GENERIC_ALL );
1023
1024     if (!obj->sd)
1025     {
1026         if (*access & MAXIMUM_ALLOWED)
1027             *access = mapping.GenericAll;
1028         return TRUE;
1029     }
1030
1031     mapping.GenericRead  = obj->ops->map_access( obj, GENERIC_READ );
1032     mapping.GenericWrite = obj->ops->map_access( obj, GENERIC_WRITE );
1033     mapping.GenericExecute = obj->ops->map_access( obj, GENERIC_EXECUTE );
1034
1035     res = token_access_check( token, obj->sd, *access, &priv, &priv_count,
1036                               &mapping, access, &status ) == STATUS_SUCCESS &&
1037           status == STATUS_SUCCESS;
1038
1039     if (!res) set_error( STATUS_ACCESS_DENIED );
1040     return res;
1041 }
1042
1043
1044 /* open a security token */
1045 DECL_HANDLER(open_token)
1046 {
1047     if (req->flags & OPEN_TOKEN_THREAD)
1048     {
1049         struct thread *thread = get_thread_from_handle( req->handle, 0 );
1050         if (thread)
1051         {
1052             if (thread->token)
1053             {
1054                 if (thread->token->impersonation_level <= SecurityAnonymous)
1055                     set_error( STATUS_CANT_OPEN_ANONYMOUS );
1056                 else
1057                     reply->token = alloc_handle( current->process, thread->token,
1058                                                  req->access, req->attributes );
1059             }
1060             else
1061                 set_error( STATUS_NO_TOKEN );
1062             release_object( thread );
1063         }
1064     }
1065     else
1066     {
1067         struct process *process = get_process_from_handle( req->handle, 0 );
1068         if (process)
1069         {
1070             if (process->token)
1071                 reply->token = alloc_handle( current->process, process->token, req->access,
1072                                              req->attributes );
1073             else
1074                 set_error( STATUS_NO_TOKEN );
1075             release_object( process );
1076         }
1077     }
1078 }
1079
1080 /* adjust the privileges held by a token */
1081 DECL_HANDLER(adjust_token_privileges)
1082 {
1083     struct token *token;
1084     unsigned int access = TOKEN_ADJUST_PRIVILEGES;
1085
1086     if (req->get_modified_state) access |= TOKEN_QUERY;
1087
1088     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1089                                                  access, &token_ops )))
1090     {
1091         const LUID_AND_ATTRIBUTES *privs = get_req_data();
1092         LUID_AND_ATTRIBUTES *modified_privs = NULL;
1093         unsigned int priv_count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1094         unsigned int modified_priv_count = 0;
1095
1096         if (req->get_modified_state && !req->disable_all)
1097         {
1098             unsigned int i;
1099             /* count modified privs */
1100             for (i = 0; i < priv_count; i++)
1101             {
1102                 struct privilege *privilege =
1103                     token_find_privilege( token, &privs[i].Luid, FALSE );
1104                 if (privilege && req->get_modified_state)
1105                     modified_priv_count++;
1106             }
1107             reply->len = modified_priv_count;
1108             modified_priv_count = min( modified_priv_count, get_reply_max_size() / sizeof(*modified_privs) );
1109             if (modified_priv_count)
1110                 modified_privs = set_reply_data_size( modified_priv_count * sizeof(*modified_privs) );
1111         }
1112         reply->len = modified_priv_count * sizeof(*modified_privs);
1113
1114         if (req->disable_all)
1115             token_disable_privileges( token );
1116         else
1117             modified_priv_count = token_adjust_privileges( token, privs,
1118                 priv_count, modified_privs, modified_priv_count );
1119
1120         release_object( token );
1121     }
1122 }
1123
1124 /* retrieves the list of privileges that may be held be the token */
1125 DECL_HANDLER(get_token_privileges)
1126 {
1127     struct token *token;
1128
1129     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1130                                                  TOKEN_QUERY,
1131                                                  &token_ops )))
1132     {
1133         int priv_count = 0;
1134         LUID_AND_ATTRIBUTES *privs;
1135         struct privilege *privilege;
1136
1137         LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1138             priv_count++;
1139
1140         reply->len = priv_count * sizeof(*privs);
1141         if (reply->len <= get_reply_max_size())
1142         {
1143             privs = set_reply_data_size( priv_count * sizeof(*privs) );
1144             if (privs)
1145             {
1146                 int i = 0;
1147                 LIST_FOR_EACH_ENTRY( privilege, &token->privileges, struct privilege, entry )
1148                 {
1149                     luid_and_attr_from_privilege( &privs[i], privilege );
1150                     i++;
1151                 }
1152             }
1153         }
1154         else
1155             set_error(STATUS_BUFFER_TOO_SMALL);
1156
1157         release_object( token );
1158     }
1159 }
1160
1161 /* creates a duplicate of the token */
1162 DECL_HANDLER(duplicate_token)
1163 {
1164     struct token *src_token;
1165
1166     if ((req->impersonation_level < SecurityAnonymous) ||
1167         (req->impersonation_level > SecurityDelegation))
1168     {
1169         set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1170         return;
1171     }
1172
1173     if ((src_token = (struct token *)get_handle_obj( current->process, req->handle,
1174                                                      TOKEN_DUPLICATE,
1175                                                      &token_ops )))
1176     {
1177         const luid_t *modified_id =
1178             req->primary || (req->impersonation_level == src_token->impersonation_level) ?
1179                 &src_token->modified_id : NULL;
1180         struct token *token = NULL;
1181
1182         if (req->primary || (req->impersonation_level <= src_token->impersonation_level))
1183             token = create_token( req->primary, src_token->user, NULL, 0,
1184                                   NULL, 0, src_token->default_dacl,
1185                                   src_token->source, modified_id,
1186                                   req->impersonation_level );
1187         else set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1188
1189         if (token)
1190         {
1191             struct privilege *privilege;
1192             struct group *group;
1193             unsigned int access;
1194
1195             /* copy groups */
1196             LIST_FOR_EACH_ENTRY( group, &src_token->groups, struct group, entry )
1197             {
1198                 size_t size = FIELD_OFFSET( struct group, sid.SubAuthority[group->sid.SubAuthorityCount] );
1199                 struct group *newgroup = mem_alloc( size );
1200                 if (!newgroup)
1201                 {
1202                     release_object( token );
1203                     release_object( src_token );
1204                     return;
1205                 }
1206                 memcpy( newgroup, group, size );
1207                 list_add_tail( &token->groups, &newgroup->entry );
1208             }
1209             token->primary_group = src_token->primary_group;
1210             assert( token->primary_group );
1211
1212             /* copy privileges */
1213             LIST_FOR_EACH_ENTRY( privilege, &src_token->privileges, struct privilege, entry )
1214                 privilege_add( token, &privilege->luid, privilege->enabled );
1215
1216             access = req->access;
1217             reply->new_handle = alloc_handle( current->process, token, access, req->attributes);
1218             release_object( token );
1219         }
1220         release_object( src_token );
1221     }
1222 }
1223
1224 /* checks the specified privileges are held by the token */
1225 DECL_HANDLER(check_token_privileges)
1226 {
1227     struct token *token;
1228
1229     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1230                                                  TOKEN_QUERY,
1231                                                  &token_ops )))
1232     {
1233         unsigned int count = get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES);
1234
1235         if (!token->primary && token->impersonation_level <= SecurityAnonymous)
1236             set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1237         else if (get_reply_max_size() >= count * sizeof(LUID_AND_ATTRIBUTES))
1238         {
1239             LUID_AND_ATTRIBUTES *usedprivs = set_reply_data_size( count * sizeof(*usedprivs) );
1240             reply->has_privileges = token_check_privileges( token, req->all_required, get_req_data(), count, usedprivs );
1241         }
1242         else
1243             set_error( STATUS_BUFFER_OVERFLOW );
1244         release_object( token );
1245     }
1246 }
1247
1248 /* checks that a user represented by a token is allowed to access an object
1249  * represented by a security descriptor */
1250 DECL_HANDLER(access_check)
1251 {
1252     data_size_t sd_size = get_req_data_size();
1253     const struct security_descriptor *sd = get_req_data();
1254     struct token *token;
1255
1256     if (!sd_is_valid( sd, sd_size ))
1257     {
1258         set_error( STATUS_ACCESS_VIOLATION );
1259         return;
1260     }
1261
1262     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1263                                                  TOKEN_QUERY,
1264                                                  &token_ops )))
1265     {
1266         GENERIC_MAPPING mapping;
1267         unsigned int status;
1268         LUID_AND_ATTRIBUTES priv;
1269         unsigned int priv_count = 1;
1270
1271         memset(&priv, 0, sizeof(priv));
1272
1273         /* only impersonation tokens may be used with this function */
1274         if (token->primary)
1275         {
1276             set_error( STATUS_NO_IMPERSONATION_TOKEN );
1277             release_object( token );
1278             return;
1279         }
1280         /* anonymous impersonation tokens can't be used */
1281         if (token->impersonation_level <= SecurityAnonymous)
1282         {
1283             set_error( STATUS_BAD_IMPERSONATION_LEVEL );
1284             release_object( token );
1285             return;
1286         }
1287
1288         mapping.GenericRead = req->mapping_read;
1289         mapping.GenericWrite = req->mapping_write;
1290         mapping.GenericExecute = req->mapping_execute;
1291         mapping.GenericAll = req->mapping_all;
1292
1293         status = token_access_check(
1294             token, sd, req->desired_access, &priv, &priv_count, &mapping,
1295             &reply->access_granted, &reply->access_status );
1296
1297         reply->privileges_len = priv_count*sizeof(LUID_AND_ATTRIBUTES);
1298
1299         if ((priv_count > 0) && (reply->privileges_len <= get_reply_max_size()))
1300         {
1301             LUID_AND_ATTRIBUTES *privs = set_reply_data_size( priv_count * sizeof(*privs) );
1302             memcpy( privs, &priv, sizeof(priv) );
1303         }
1304
1305         set_error( status );
1306         release_object( token );
1307     }
1308 }
1309
1310 /* retrieves the SID of the user that the token represents */
1311 DECL_HANDLER(get_token_user)
1312 {
1313     struct token *token;
1314
1315     reply->user_len = 0;
1316
1317     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1318                                                  TOKEN_QUERY,
1319                                                  &token_ops )))
1320     {
1321         const SID *user = token->user;
1322
1323         reply->user_len = FIELD_OFFSET(SID, SubAuthority[user->SubAuthorityCount]);
1324         if (reply->user_len <= get_reply_max_size())
1325         {
1326             SID *user_reply = set_reply_data_size( reply->user_len );
1327             if (user_reply)
1328                 memcpy( user_reply, user, reply->user_len );
1329         }
1330         else set_error( STATUS_BUFFER_TOO_SMALL );
1331
1332         release_object( token );
1333     }
1334 }
1335
1336 /* retrieves the groups that the user represented by the token belongs to */
1337 DECL_HANDLER(get_token_groups)
1338 {
1339     struct token *token;
1340
1341     reply->user_len = 0;
1342
1343     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1344                                                  TOKEN_QUERY,
1345                                                  &token_ops )))
1346     {
1347         size_t size_needed = sizeof(struct token_groups);
1348         unsigned int group_count = 0;
1349         const struct group *group;
1350
1351         LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1352         {
1353             group_count++;
1354             size_needed += FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]);
1355         }
1356         size_needed += sizeof(unsigned int) * group_count;
1357
1358         reply->user_len = size_needed;
1359
1360         if (size_needed <= get_reply_max_size())
1361         {
1362             struct token_groups *tg = set_reply_data_size( size_needed );
1363             if (tg)
1364             {
1365                 unsigned int *attr_ptr = (unsigned int *)(tg + 1);
1366                 SID *sid_ptr = (SID *)(attr_ptr + group_count);
1367
1368                 tg->count = group_count;
1369
1370                 LIST_FOR_EACH_ENTRY( group, &token->groups, const struct group, entry )
1371                 {
1372
1373                     *attr_ptr = 0;
1374                     if (group->mandatory) *attr_ptr |= SE_GROUP_MANDATORY;
1375                     if (group->def) *attr_ptr |= SE_GROUP_ENABLED_BY_DEFAULT;
1376                     if (group->enabled) *attr_ptr |= SE_GROUP_ENABLED;
1377                     if (group->owner) *attr_ptr |= SE_GROUP_OWNER;
1378                     if (group->deny_only) *attr_ptr |= SE_GROUP_USE_FOR_DENY_ONLY;
1379                     if (group->resource) *attr_ptr |= SE_GROUP_RESOURCE;
1380
1381                     memcpy(sid_ptr, &group->sid, FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1382
1383                     sid_ptr = (SID *)((char *)sid_ptr + FIELD_OFFSET(SID, SubAuthority[group->sid.SubAuthorityCount]));
1384                     attr_ptr++;
1385                 }
1386             }
1387         }
1388         else set_error( STATUS_BUFFER_TOO_SMALL );
1389
1390         release_object( token );
1391     }
1392 }
1393
1394 DECL_HANDLER(get_token_impersonation_level)
1395 {
1396     struct token *token;
1397
1398     if ((token = (struct token *)get_handle_obj( current->process, req->handle,
1399                                                  TOKEN_QUERY,
1400                                                  &token_ops )))
1401     {
1402         if (token->primary)
1403             set_error( STATUS_INVALID_PARAMETER );
1404         else
1405             reply->impersonation_level = token->impersonation_level;
1406
1407         release_object( token );
1408     }
1409 }
1410
1411 DECL_HANDLER(set_security_object)
1412 {
1413     data_size_t sd_size = get_req_data_size();
1414     const struct security_descriptor *sd = get_req_data();
1415     struct object *obj;
1416     unsigned int access = 0;
1417
1418     if (!sd_is_valid( sd, sd_size ))
1419     {
1420         set_error( STATUS_ACCESS_VIOLATION );
1421         return;
1422     }
1423
1424     if (req->security_info & OWNER_SECURITY_INFORMATION ||
1425         req->security_info & GROUP_SECURITY_INFORMATION)
1426         access |= WRITE_OWNER;
1427     if (req->security_info & SACL_SECURITY_INFORMATION)
1428         access |= ACCESS_SYSTEM_SECURITY;
1429     if (req->security_info & DACL_SECURITY_INFORMATION)
1430         access |= WRITE_DAC;
1431
1432     if (!(obj = get_handle_obj( current->process, req->handle, access, NULL ))) return;
1433
1434     set_object_sd( obj, sd, req->security_info );
1435     release_object( obj );
1436 }