dlls/advapi32/registry.c

   1 /*
   2  * Registry management
   3  *
   4  * Copyright (C) 1999 Alexandre Julliard
   5  *
   6  * Based on misc/registry.c code
   7  * Copyright (C) 1996 Marcus Meissner
   8  * Copyright (C) 1998 Matthew Becker
   9  * Copyright (C) 1999 Sylvain St-Germain
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  24  */
  25
  26 #include <stdlib.h>
  27 #include <stdarg.h>
  28 #include <stdio.h>
  29
  30 #include "ntstatus.h"
  31 #define WIN32_NO_STATUS
  32 #include "windef.h"
  33 #include "winbase.h"
  34 #include "winreg.h"
  35 #include "winerror.h"
  36 #include "winternl.h"
  37 #include "winuser.h"
  38
  39 #include "wine/unicode.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(reg);
  43
  44 #define HKEY_SPECIAL_ROOT_FIRST   HKEY_CLASSES_ROOT
  45 #define HKEY_SPECIAL_ROOT_LAST    HKEY_DYN_DATA
  46 #define NB_SPECIAL_ROOT_KEYS      ((UINT_PTR)HKEY_SPECIAL_ROOT_LAST - (UINT_PTR)HKEY_SPECIAL_ROOT_FIRST + 1)
  47
  48 static HKEY special_root_keys[NB_SPECIAL_ROOT_KEYS];
  49 static BOOL hkcu_cache_disabled;
  50
  51 static const WCHAR name_CLASSES_ROOT[] =
  52     {'M','a','c','h','i','n','e','\\',
  53      'S','o','f','t','w','a','r','e','\\',
  54      'C','l','a','s','s','e','s',0};
  55 static const WCHAR name_LOCAL_MACHINE[] =
  56     {'M','a','c','h','i','n','e',0};
  57 static const WCHAR name_USERS[] =
  58     {'U','s','e','r',0};
  59 static const WCHAR name_PERFORMANCE_DATA[] =
  60     {'P','e','r','f','D','a','t','a',0};
  61 static const WCHAR name_CURRENT_CONFIG[] =
  62     {'M','a','c','h','i','n','e','\\',
  63      'S','y','s','t','e','m','\\',
  64      'C','u','r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\',
  65      'H','a','r','d','w','a','r','e',' ','P','r','o','f','i','l','e','s','\\',
  66      'C','u','r','r','e','n','t',0};
  67 static const WCHAR name_DYN_DATA[] =
  68     {'D','y','n','D','a','t','a',0};
  69
  70 static const WCHAR * const root_key_names[NB_SPECIAL_ROOT_KEYS] =
  71 {
  72     name_CLASSES_ROOT,
  73     NULL,         /* HKEY_CURRENT_USER is determined dynamically */
  74     name_LOCAL_MACHINE,
  75     name_USERS,
  76     name_PERFORMANCE_DATA,
  77     name_CURRENT_CONFIG,
  78     name_DYN_DATA
  79 };
  80
  81
  82 /* check if value type needs string conversion (Ansi<->Unicode) */
  83 static inline int is_string( DWORD type )
  84 {
  85     return (type == REG_SZ) || (type == REG_EXPAND_SZ) || (type == REG_MULTI_SZ);
  86 }
  87
  88 /* check if current version is NT or Win95 */
  89 static inline int is_version_nt(void)
  90 {
  91     return !(GetVersion() & 0x80000000);
  92 }
  93
  94 /* wrapper for NtCreateKey that creates the key recursively if necessary */
  95 static NTSTATUS create_key( HKEY *retkey, ACCESS_MASK access, OBJECT_ATTRIBUTES *attr,
  96                             const UNICODE_STRING *class, ULONG options, PULONG dispos )
  97 {
  98     NTSTATUS status = NtCreateKey( (HANDLE *)retkey, access, attr, 0, class, options, dispos );
  99
 100     if (status == STATUS_OBJECT_NAME_NOT_FOUND)
 101     {
 102         DWORD attrs, i = 0, len = attr->ObjectName->Length / sizeof(WCHAR);
 103
 104         while (i < len && attr->ObjectName->Buffer[i] != '\\') i++;
 105         if (i == len) return status;
 106         attrs = attr->Attributes;
 107         attr->Attributes &= ~OBJ_OPENLINK;
 108
 109         while (i < len)
 110         {
 111             attr->ObjectName->Length = i * sizeof(WCHAR);
 112             status = NtCreateKey( (HANDLE *)retkey, access, attr, 0, class,
 113                                   options & ~REG_OPTION_CREATE_LINK, dispos );
 114             if (status) return status;
 115             NtClose( *retkey );
 116             while (i < len && attr->ObjectName->Buffer[i] == '\\') i++;
 117             while (i < len && attr->ObjectName->Buffer[i] != '\\') i++;
 118         }
 119         attr->Attributes = attrs;
 120         attr->ObjectName->Length = len * sizeof(WCHAR);
 121         status = NtCreateKey( (PHANDLE)retkey, access, attr, 0, class, options, dispos );
 122     }
 123     return status;
 124 }
 125
 126 /* create one of the HKEY_* special root keys */
 127 static HKEY create_special_root_hkey( HKEY hkey, DWORD access )
 128 {
 129     HKEY ret = 0;
 130     int idx = (UINT_PTR)hkey - (UINT_PTR)HKEY_SPECIAL_ROOT_FIRST;
 131
 132     if (hkey == HKEY_CURRENT_USER)
 133     {
 134         if (RtlOpenCurrentUser( access, (HANDLE *)&hkey )) return 0;
 135         TRACE( "HKEY_CURRENT_USER -> %p\n", hkey );
 136
 137         /* don't cache the key in the table if caching is disabled */
 138         if (hkcu_cache_disabled)
 139             return hkey;
 140     }
 141     else
 142     {
 143         OBJECT_ATTRIBUTES attr;
 144         UNICODE_STRING name;
 145
 146         attr.Length = sizeof(attr);
 147         attr.RootDirectory = 0;
 148         attr.ObjectName = &name;
 149         attr.Attributes = 0;
 150         attr.SecurityDescriptor = NULL;
 151         attr.SecurityQualityOfService = NULL;
 152         RtlInitUnicodeString( &name, root_key_names[idx] );
 153         if (create_key( &hkey, access, &attr, NULL, 0, NULL )) return 0;
 154         TRACE( "%s -> %p\n", debugstr_w(attr.ObjectName->Buffer), hkey );
 155     }
 156
 157     if (!(ret = InterlockedCompareExchangePointer( (void **)&special_root_keys[idx], hkey, 0 )))
 158         ret = hkey;
 159     else
 160         NtClose( hkey );  /* somebody beat us to it */
 161     return ret;
 162 }
 163
 164 /* map the hkey from special root to normal key if necessary */
 165 static inline HKEY get_special_root_hkey( HKEY hkey )
 166 {
 167     HKEY ret = hkey;
 168
 169     if ((hkey >= HKEY_SPECIAL_ROOT_FIRST) && (hkey <= HKEY_SPECIAL_ROOT_LAST))
 170     {
 171         if (!(ret = special_root_keys[(UINT_PTR)hkey - (UINT_PTR)HKEY_SPECIAL_ROOT_FIRST]))
 172             ret = create_special_root_hkey( hkey, MAXIMUM_ALLOWED );
 173     }
 174     return ret;
 175 }
 176
 177
 178 /******************************************************************************
 179  * RegOverridePredefKey   [ADVAPI32.@]
 180  */
 181 LSTATUS WINAPI RegOverridePredefKey( HKEY hkey, HKEY override )
 182 {
 183     HKEY old_key;
 184     int idx;
 185
 186     if ((hkey < HKEY_SPECIAL_ROOT_FIRST) || (hkey > HKEY_SPECIAL_ROOT_LAST))
 187         return ERROR_INVALID_PARAMETER;
 188     idx = (UINT_PTR)hkey - (UINT_PTR)HKEY_SPECIAL_ROOT_FIRST;
 189
 190     if (override)
 191     {
 192         NTSTATUS status = NtDuplicateObject( GetCurrentProcess(), override,
 193                                              GetCurrentProcess(), (HANDLE *)&override,
 194                                              0, 0, DUPLICATE_SAME_ACCESS );
 195         if (status) return RtlNtStatusToDosError( status );
 196     }
 197
 198     old_key = InterlockedExchangePointer( (void **)&special_root_keys[idx], override );
 199     if (old_key) NtClose( old_key );
 200     return ERROR_SUCCESS;
 201 }
 202
 203
 204 /******************************************************************************
 205  * RegCreateKeyExW   [ADVAPI32.@]
 206  *
 207  * See RegCreateKeyExA.
 208  */
 209 LSTATUS WINAPI RegCreateKeyExW( HKEY hkey, LPCWSTR name, DWORD reserved, LPWSTR class,
 210                              DWORD options, REGSAM access, SECURITY_ATTRIBUTES *sa,
 211                              PHKEY retkey, LPDWORD dispos )
 212 {
 213     OBJECT_ATTRIBUTES attr;
 214     UNICODE_STRING nameW, classW;
 215
 216     if (reserved) return ERROR_INVALID_PARAMETER;
 217     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 218
 219     attr.Length = sizeof(attr);
 220     attr.RootDirectory = hkey;
 221     attr.ObjectName = &nameW;
 222     attr.Attributes = 0;
 223     attr.SecurityDescriptor = NULL;
 224     attr.SecurityQualityOfService = NULL;
 225     if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
 226     RtlInitUnicodeString( &nameW, name );
 227     RtlInitUnicodeString( &classW, class );
 228
 229     return RtlNtStatusToDosError( create_key( retkey, access, &attr, &classW, options, dispos ) );
 230 }
 231
 232
 233 /******************************************************************************
 234  * RegCreateKeyExA   [ADVAPI32.@]
 235  *
 236  * Open a registry key, creating it if it doesn't exist.
 237  *
 238  * PARAMS
 239  *  hkey       [I] Handle of the parent registry key
 240  *  name       [I] Name of the new key to open or create
 241  *  reserved   [I] Reserved, pass 0
 242  *  class      [I] The object type of the new key
 243  *  options    [I] Flags controlling the key creation (REG_OPTION_* flags from "winnt.h")
 244  *  access     [I] Access level desired
 245  *  sa         [I] Security attributes for the key
 246  *  retkey     [O] Destination for the resulting handle
 247  *  dispos     [O] Receives REG_CREATED_NEW_KEY or REG_OPENED_EXISTING_KEY
 248  *
 249  * RETURNS
 250  *  Success: ERROR_SUCCESS.
 251  *  Failure: A standard Win32 error code. retkey remains untouched.
 252  *
 253  * FIXME
 254  *  MAXIMUM_ALLOWED in access mask not supported by server
 255  */
 256 LSTATUS WINAPI RegCreateKeyExA( HKEY hkey, LPCSTR name, DWORD reserved, LPSTR class,
 257                              DWORD options, REGSAM access, SECURITY_ATTRIBUTES *sa,
 258                              PHKEY retkey, LPDWORD dispos )
 259 {
 260     OBJECT_ATTRIBUTES attr;
 261     UNICODE_STRING classW;
 262     ANSI_STRING nameA, classA;
 263     NTSTATUS status;
 264
 265     if (reserved) return ERROR_INVALID_PARAMETER;
 266     if (!is_version_nt())
 267     {
 268         access = MAXIMUM_ALLOWED;  /* Win95 ignores the access mask */
 269         if (name && *name == '\\') name++; /* win9x,ME ignores one (and only one) beginning backslash */
 270     }
 271     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 272
 273     attr.Length = sizeof(attr);
 274     attr.RootDirectory = hkey;
 275     attr.ObjectName = &NtCurrentTeb()->StaticUnicodeString;
 276     attr.Attributes = 0;
 277     attr.SecurityDescriptor = NULL;
 278     attr.SecurityQualityOfService = NULL;
 279     if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
 280     RtlInitAnsiString( &nameA, name );
 281     RtlInitAnsiString( &classA, class );
 282
 283     if (!(status = RtlAnsiStringToUnicodeString( &NtCurrentTeb()->StaticUnicodeString,
 284                                                  &nameA, FALSE )))
 285     {
 286         if (!(status = RtlAnsiStringToUnicodeString( &classW, &classA, TRUE )))
 287         {
 288             status = create_key( retkey, access, &attr, &classW, options, dispos );
 289             RtlFreeUnicodeString( &classW );
 290         }
 291     }
 292     return RtlNtStatusToDosError( status );
 293 }
 294
 295
 296 /******************************************************************************
 297  * RegCreateKeyW   [ADVAPI32.@]
 298  *
 299  * Creates the specified reg key.
 300  *
 301  * PARAMS
 302  *  hKey      [I] Handle to an open key.
 303  *  lpSubKey  [I] Name of a key that will be opened or created.
 304  *  phkResult [O] Receives a handle to the opened or created key.
 305  *
 306  * RETURNS
 307  *  Success: ERROR_SUCCESS
 308  *  Failure: nonzero error code defined in Winerror.h
 309  */
 310 LSTATUS WINAPI RegCreateKeyW( HKEY hkey, LPCWSTR lpSubKey, PHKEY phkResult )
 311 {
 312     /* FIXME: previous implementation converted ERROR_INVALID_HANDLE to ERROR_BADKEY, */
 313     /* but at least my version of NT (4.0 SP5) doesn't do this.  -- AJ */
 314     return RegCreateKeyExW( hkey, lpSubKey, 0, NULL, REG_OPTION_NON_VOLATILE,
 315                             MAXIMUM_ALLOWED, NULL, phkResult, NULL );
 316 }
 317
 318
 319 /******************************************************************************
 320  * RegCreateKeyA   [ADVAPI32.@]
 321  *
 322  * See RegCreateKeyW.
 323  */
 324 LSTATUS WINAPI RegCreateKeyA( HKEY hkey, LPCSTR lpSubKey, PHKEY phkResult )
 325 {
 326     return RegCreateKeyExA( hkey, lpSubKey, 0, NULL, REG_OPTION_NON_VOLATILE,
 327                             MAXIMUM_ALLOWED, NULL, phkResult, NULL );
 328 }
 329
 330
 331
 332 /******************************************************************************
 333  * RegOpenKeyExW   [ADVAPI32.@]
 334  *
 335  * See RegOpenKeyExA.
 336  */
 337 LSTATUS WINAPI RegOpenKeyExW( HKEY hkey, LPCWSTR name, DWORD options, REGSAM access, PHKEY retkey )
 338 {
 339     OBJECT_ATTRIBUTES attr;
 340     UNICODE_STRING nameW;
 341
 342     /* NT+ allows beginning backslash for HKEY_CLASSES_ROOT */
 343     if (hkey == HKEY_CLASSES_ROOT && name && *name == '\\') name++;
 344
 345     if (!retkey) return ERROR_INVALID_PARAMETER;
 346     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 347
 348     attr.Length = sizeof(attr);
 349     attr.RootDirectory = hkey;
 350     attr.ObjectName = &nameW;
 351     attr.Attributes = 0;
 352     attr.SecurityDescriptor = NULL;
 353     attr.SecurityQualityOfService = NULL;
 354     if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
 355     RtlInitUnicodeString( &nameW, name );
 356     return RtlNtStatusToDosError( NtOpenKey( (PHANDLE)retkey, access, &attr ) );
 357 }
 358
 359
 360 /******************************************************************************
 361  * RegOpenKeyExA   [ADVAPI32.@]
 362  *
 363  * Open a registry key.
 364  *
 365  * PARAMS
 366  *  hkey       [I] Handle of open key
 367  *  name       [I] Name of subkey to open
 368  *  options    [I] Open options (can be set to REG_OPTION_OPEN_LINK)
 369  *  access     [I] Security access mask
 370  *  retkey     [O] Handle to open key
 371  *
 372  * RETURNS
 373  *  Success: ERROR_SUCCESS
 374  *  Failure: A standard Win32 error code. retkey is set to 0.
 375  *
 376  * NOTES
 377  *  Unlike RegCreateKeyExA(), this function will not create the key if it
 378  *  does not exist.
 379  */
 380 LSTATUS WINAPI RegOpenKeyExA( HKEY hkey, LPCSTR name, DWORD options, REGSAM access, PHKEY retkey )
 381 {
 382     OBJECT_ATTRIBUTES attr;
 383     STRING nameA;
 384     NTSTATUS status;
 385
 386     if (!is_version_nt()) access = MAXIMUM_ALLOWED;  /* Win95 ignores the access mask */
 387     else
 388     {
 389         /* NT+ allows beginning backslash for HKEY_CLASSES_ROOT */
 390         if (hkey == HKEY_CLASSES_ROOT && name && *name == '\\') name++;
 391     }
 392
 393     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 394
 395     attr.Length = sizeof(attr);
 396     attr.RootDirectory = hkey;
 397     attr.ObjectName = &NtCurrentTeb()->StaticUnicodeString;
 398     attr.Attributes = 0;
 399     attr.SecurityDescriptor = NULL;
 400     attr.SecurityQualityOfService = NULL;
 401     if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
 402
 403     RtlInitAnsiString( &nameA, name );
 404     if (!(status = RtlAnsiStringToUnicodeString( &NtCurrentTeb()->StaticUnicodeString,
 405                                                  &nameA, FALSE )))
 406     {
 407         status = NtOpenKey( (PHANDLE)retkey, access, &attr );
 408     }
 409     return RtlNtStatusToDosError( status );
 410 }
 411
 412
 413 /******************************************************************************
 414  * RegOpenKeyW   [ADVAPI32.@]
 415  *
 416  * See RegOpenKeyA.
 417  */
 418 LSTATUS WINAPI RegOpenKeyW( HKEY hkey, LPCWSTR name, PHKEY retkey )
 419 {
 420     if (!retkey)
 421         return ERROR_INVALID_PARAMETER;
 422
 423     if (!name || !*name)
 424     {
 425         *retkey = hkey;
 426         return ERROR_SUCCESS;
 427     }
 428     return RegOpenKeyExW( hkey, name, 0, MAXIMUM_ALLOWED, retkey );
 429 }
 430
 431
 432 /******************************************************************************
 433  * RegOpenKeyA   [ADVAPI32.@]
 434  *
 435  * Open a registry key.
 436  *
 437  * PARAMS
 438  *  hkey    [I] Handle of parent key to open the new key under
 439  *  name    [I] Name of the key under hkey to open
 440  *  retkey  [O] Destination for the resulting Handle
 441  *
 442  * RETURNS
 443  *  Success: ERROR_SUCCESS
 444  *  Failure: A standard Win32 error code. When retkey is valid, *retkey is set to 0.
 445  */
 446 LSTATUS WINAPI RegOpenKeyA( HKEY hkey, LPCSTR name, PHKEY retkey )
 447 {
 448     if (!retkey)
 449         return ERROR_INVALID_PARAMETER;
 450
 451     if (!name || !*name)
 452     {
 453         *retkey = hkey;
 454         return ERROR_SUCCESS;
 455     }
 456     return RegOpenKeyExA( hkey, name, 0, MAXIMUM_ALLOWED, retkey );
 457 }
 458
 459
 460 /******************************************************************************
 461  * RegOpenCurrentUser   [ADVAPI32.@]
 462  *
 463  * Get a handle to the HKEY_CURRENT_USER key for the user
 464  * the current thread is impersonating.
 465  *
 466  * PARAMS
 467  *  access [I] Desired access rights to the key
 468  *  retkey [O] Handle to the opened key
 469  *
 470  * RETURNS
 471  *  Success: ERROR_SUCCESS
 472  *  Failure: nonzero error code from Winerror.h
 473  *
 474  * FIXME
 475  *  This function is supposed to retrieve a handle to the
 476  *  HKEY_CURRENT_USER for the user the current thread is impersonating.
 477  *  Since Wine does not currently allow threads to impersonate other users,
 478  *  this stub should work fine.
 479  */
 480 LSTATUS WINAPI RegOpenCurrentUser( REGSAM access, PHKEY retkey )
 481 {
 482     return RegOpenKeyExA( HKEY_CURRENT_USER, "", 0, access, retkey );
 483 }
 484
 485
 486
 487 /******************************************************************************
 488  * RegEnumKeyExW   [ADVAPI32.@]
 489  *
 490  * Enumerate subkeys of the specified open registry key.
 491  *
 492  * PARAMS
 493  *  hkey         [I] Handle to key to enumerate
 494  *  index        [I] Index of subkey to enumerate
 495  *  name         [O] Buffer for subkey name
 496  *  name_len     [O] Size of subkey buffer
 497  *  reserved     [I] Reserved
 498  *  class        [O] Buffer for class string
 499  *  class_len    [O] Size of class buffer
 500  *  ft           [O] Time key last written to
 501  *
 502  * RETURNS
 503  *  Success: ERROR_SUCCESS
 504  *  Failure: System error code. If there are no more subkeys available, the
 505  *           function returns ERROR_NO_MORE_ITEMS.
 506  */
 507 LSTATUS WINAPI RegEnumKeyExW( HKEY hkey, DWORD index, LPWSTR name, LPDWORD name_len,
 508                            LPDWORD reserved, LPWSTR class, LPDWORD class_len, FILETIME *ft )
 509 {
 510     NTSTATUS status;
 511     char buffer[256], *buf_ptr = buffer;
 512     KEY_NODE_INFORMATION *info = (KEY_NODE_INFORMATION *)buffer;
 513     DWORD total_size;
 514
 515     TRACE( "(%p,%d,%p,%p(%u),%p,%p,%p,%p)\n", hkey, index, name, name_len,
 516            name_len ? *name_len : 0, reserved, class, class_len, ft );
 517
 518     if (reserved) return ERROR_INVALID_PARAMETER;
 519     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 520
 521     status = NtEnumerateKey( hkey, index, KeyNodeInformation,
 522                              buffer, sizeof(buffer), &total_size );
 523
 524     while (status == STATUS_BUFFER_OVERFLOW)
 525     {
 526         /* retry with a dynamically allocated buffer */
 527         if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 528         if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
 529             return ERROR_NOT_ENOUGH_MEMORY;
 530         info = (KEY_NODE_INFORMATION *)buf_ptr;
 531         status = NtEnumerateKey( hkey, index, KeyNodeInformation,
 532                                  buf_ptr, total_size, &total_size );
 533     }
 534
 535     if (!status)
 536     {
 537         DWORD len = info->NameLength / sizeof(WCHAR);
 538         DWORD cls_len = info->ClassLength / sizeof(WCHAR);
 539
 540         if (ft) *ft = *(FILETIME *)&info->LastWriteTime;
 541
 542         if (len >= *name_len || (class && class_len && (cls_len >= *class_len)))
 543             status = STATUS_BUFFER_OVERFLOW;
 544         else
 545         {
 546             *name_len = len;
 547             memcpy( name, info->Name, info->NameLength );
 548             name[len] = 0;
 549             if (class_len)
 550             {
 551                 *class_len = cls_len;
 552                 if (class)
 553                 {
 554                     memcpy( class, buf_ptr + info->ClassOffset, info->ClassLength );
 555                     class[cls_len] = 0;
 556                 }
 557             }
 558         }
 559     }
 560
 561     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 562     return RtlNtStatusToDosError( status );
 563 }
 564
 565
 566 /******************************************************************************
 567  * RegEnumKeyExA   [ADVAPI32.@]
 568  *
 569  * See RegEnumKeyExW.
 570  */
 571 LSTATUS WINAPI RegEnumKeyExA( HKEY hkey, DWORD index, LPSTR name, LPDWORD name_len,
 572                            LPDWORD reserved, LPSTR class, LPDWORD class_len, FILETIME *ft )
 573 {
 574     NTSTATUS status;
 575     char buffer[256], *buf_ptr = buffer;
 576     KEY_NODE_INFORMATION *info = (KEY_NODE_INFORMATION *)buffer;
 577     DWORD total_size;
 578
 579     TRACE( "(%p,%d,%p,%p(%u),%p,%p,%p,%p)\n", hkey, index, name, name_len,
 580            name_len ? *name_len : 0, reserved, class, class_len, ft );
 581
 582     if (reserved) return ERROR_INVALID_PARAMETER;
 583     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 584
 585     status = NtEnumerateKey( hkey, index, KeyNodeInformation,
 586                              buffer, sizeof(buffer), &total_size );
 587
 588     while (status == STATUS_BUFFER_OVERFLOW)
 589     {
 590         /* retry with a dynamically allocated buffer */
 591         if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 592         if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
 593             return ERROR_NOT_ENOUGH_MEMORY;
 594         info = (KEY_NODE_INFORMATION *)buf_ptr;
 595         status = NtEnumerateKey( hkey, index, KeyNodeInformation,
 596                                  buf_ptr, total_size, &total_size );
 597     }
 598
 599     if (!status)
 600     {
 601         DWORD len, cls_len;
 602
 603         RtlUnicodeToMultiByteSize( &len, info->Name, info->NameLength );
 604         RtlUnicodeToMultiByteSize( &cls_len, (WCHAR *)(buf_ptr + info->ClassOffset),
 605                                    info->ClassLength );
 606         if (ft) *ft = *(FILETIME *)&info->LastWriteTime;
 607
 608         if (len >= *name_len || (class && class_len && (cls_len >= *class_len)))
 609             status = STATUS_BUFFER_OVERFLOW;
 610         else
 611         {
 612             *name_len = len;
 613             RtlUnicodeToMultiByteN( name, len, NULL, info->Name, info->NameLength );
 614             name[len] = 0;
 615             if (class_len)
 616             {
 617                 *class_len = cls_len;
 618                 if (class)
 619                 {
 620                     RtlUnicodeToMultiByteN( class, cls_len, NULL,
 621                                             (WCHAR *)(buf_ptr + info->ClassOffset),
 622                                             info->ClassLength );
 623                     class[cls_len] = 0;
 624                 }
 625             }
 626         }
 627     }
 628
 629     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 630     return RtlNtStatusToDosError( status );
 631 }
 632
 633
 634 /******************************************************************************
 635  * RegEnumKeyW   [ADVAPI32.@]
 636  *
 637  * Enumerates subkeys of the specified open reg key.
 638  *
 639  * PARAMS
 640  *  hKey    [I] Handle to an open key.
 641  *  dwIndex [I] Index of the subkey of hKey to retrieve.
 642  *  lpName  [O] Name of the subkey.
 643  *  cchName [I] Size of lpName in TCHARS.
 644  *
 645  * RETURNS
 646  *  Success: ERROR_SUCCESS
 647  *  Failure: system error code. If there are no more subkeys available, the
 648  *           function returns ERROR_NO_MORE_ITEMS.
 649  */
 650 LSTATUS WINAPI RegEnumKeyW( HKEY hkey, DWORD index, LPWSTR name, DWORD name_len )
 651 {
 652     return RegEnumKeyExW( hkey, index, name, &name_len, NULL, NULL, NULL, NULL );
 653 }
 654
 655
 656 /******************************************************************************
 657  * RegEnumKeyA   [ADVAPI32.@]
 658  *
 659  * See RegEnumKeyW.
 660  */
 661 LSTATUS WINAPI RegEnumKeyA( HKEY hkey, DWORD index, LPSTR name, DWORD name_len )
 662 {
 663     return RegEnumKeyExA( hkey, index, name, &name_len, NULL, NULL, NULL, NULL );
 664 }
 665
 666
 667 /******************************************************************************
 668  * RegQueryInfoKeyW   [ADVAPI32.@]
 669  *
 670  * Retrieves information about the specified registry key.
 671  *
 672  * PARAMS
 673  *    hkey       [I] Handle to key to query
 674  *    class      [O] Buffer for class string
 675  *    class_len  [O] Size of class string buffer
 676  *    reserved   [I] Reserved
 677  *    subkeys    [O] Buffer for number of subkeys
 678  *    max_subkey [O] Buffer for longest subkey name length
 679  *    max_class  [O] Buffer for longest class string length
 680  *    values     [O] Buffer for number of value entries
 681  *    max_value  [O] Buffer for longest value name length
 682  *    max_data   [O] Buffer for longest value data length
 683  *    security   [O] Buffer for security descriptor length
 684  *    modif      [O] Modification time
 685  *
 686  * RETURNS
 687  *  Success: ERROR_SUCCESS
 688  *  Failure: system error code.
 689  *
 690  * NOTES
 691  *  - win95 allows class to be valid and class_len to be NULL
 692  *  - winnt returns ERROR_INVALID_PARAMETER if class is valid and class_len is NULL
 693  *  - both allow class to be NULL and class_len to be NULL
 694  *    (it's hard to test validity, so test !NULL instead)
 695  */
 696 LSTATUS WINAPI RegQueryInfoKeyW( HKEY hkey, LPWSTR class, LPDWORD class_len, LPDWORD reserved,
 697                               LPDWORD subkeys, LPDWORD max_subkey, LPDWORD max_class,
 698                               LPDWORD values, LPDWORD max_value, LPDWORD max_data,
 699                               LPDWORD security, FILETIME *modif )
 700 {
 701     NTSTATUS status;
 702     char buffer[256], *buf_ptr = buffer;
 703     KEY_FULL_INFORMATION *info = (KEY_FULL_INFORMATION *)buffer;
 704     DWORD total_size;
 705
 706     TRACE( "(%p,%p,%d,%p,%p,%p,%p,%p,%p,%p,%p)\n", hkey, class, class_len ? *class_len : 0,
 707            reserved, subkeys, max_subkey, values, max_value, max_data, security, modif );
 708
 709     if (class && !class_len && is_version_nt()) return ERROR_INVALID_PARAMETER;
 710     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 711
 712     status = NtQueryKey( hkey, KeyFullInformation, buffer, sizeof(buffer), &total_size );
 713     if (status && status != STATUS_BUFFER_OVERFLOW) goto done;
 714
 715     if (class)
 716     {
 717         /* retry with a dynamically allocated buffer */
 718         while (status == STATUS_BUFFER_OVERFLOW)
 719         {
 720             if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 721             if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
 722                 return ERROR_NOT_ENOUGH_MEMORY;
 723             info = (KEY_FULL_INFORMATION *)buf_ptr;
 724             status = NtQueryKey( hkey, KeyFullInformation, buf_ptr, total_size, &total_size );
 725         }
 726
 727         if (status) goto done;
 728
 729         if (class_len && (info->ClassLength/sizeof(WCHAR) + 1 > *class_len))
 730         {
 731             status = STATUS_BUFFER_OVERFLOW;
 732         }
 733         else
 734         {
 735             memcpy( class, buf_ptr + info->ClassOffset, info->ClassLength );
 736             class[info->ClassLength/sizeof(WCHAR)] = 0;
 737         }
 738     }
 739     else status = STATUS_SUCCESS;
 740
 741     if (class_len) *class_len = info->ClassLength / sizeof(WCHAR);
 742     if (subkeys) *subkeys = info->SubKeys;
 743     if (max_subkey) *max_subkey = info->MaxNameLen;
 744     if (max_class) *max_class = info->MaxClassLen;
 745     if (values) *values = info->Values;
 746     if (max_value) *max_value = info->MaxValueNameLen;
 747     if (max_data) *max_data = info->MaxValueDataLen;
 748     if (modif) *modif = *(FILETIME *)&info->LastWriteTime;
 749
 750  done:
 751     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 752     return RtlNtStatusToDosError( status );
 753 }
 754
 755
 756 /******************************************************************************
 757  * RegQueryMultipleValuesA   [ADVAPI32.@]
 758  *
 759  * Retrieves the type and data for a list of value names associated with a key.
 760  *
 761  * PARAMS
 762  *  hKey       [I] Handle to an open key.
 763  *  val_list   [O] Array of VALENT structures that describes the entries.
 764  *  num_vals   [I] Number of elements in val_list.
 765  *  lpValueBuf [O] Pointer to a buffer that receives the data for each value.
 766  *  ldwTotsize [I/O] Size of lpValueBuf.
 767  *
 768  * RETURNS
 769  *  Success: ERROR_SUCCESS. ldwTotsize contains num bytes copied.
 770  *  Failure: nonzero error code from Winerror.h ldwTotsize contains num needed
 771  *           bytes.
 772  */
 773 LSTATUS WINAPI RegQueryMultipleValuesA( HKEY hkey, PVALENTA val_list, DWORD num_vals,
 774                                      LPSTR lpValueBuf, LPDWORD ldwTotsize )
 775 {
 776     unsigned int i;
 777     DWORD maxBytes = *ldwTotsize;
 778     HRESULT status;
 779     LPSTR bufptr = lpValueBuf;
 780     *ldwTotsize = 0;
 781
 782     TRACE("(%p,%p,%d,%p,%p=%d)\n", hkey, val_list, num_vals, lpValueBuf, ldwTotsize, *ldwTotsize);
 783
 784     for(i=0; i < num_vals; ++i)
 785     {
 786
 787         val_list[i].ve_valuelen=0;
 788         status = RegQueryValueExA(hkey, val_list[i].ve_valuename, NULL, NULL, NULL, &val_list[i].ve_valuelen);
 789         if(status != ERROR_SUCCESS)
 790         {
 791             return status;
 792         }
 793
 794         if(lpValueBuf != NULL && *ldwTotsize + val_list[i].ve_valuelen <= maxBytes)
 795         {
 796             status = RegQueryValueExA(hkey, val_list[i].ve_valuename, NULL, &val_list[i].ve_type,
 797                                       (LPBYTE)bufptr, &val_list[i].ve_valuelen);
 798             if(status != ERROR_SUCCESS)
 799             {
 800                 return status;
 801             }
 802
 803             val_list[i].ve_valueptr = (DWORD_PTR)bufptr;
 804
 805             bufptr += val_list[i].ve_valuelen;
 806         }
 807
 808         *ldwTotsize += val_list[i].ve_valuelen;
 809     }
 810     return lpValueBuf != NULL && *ldwTotsize <= maxBytes ? ERROR_SUCCESS : ERROR_MORE_DATA;
 811 }
 812
 813
 814 /******************************************************************************
 815  * RegQueryMultipleValuesW   [ADVAPI32.@]
 816  *
 817  * See RegQueryMultipleValuesA.
 818  */
 819 LSTATUS WINAPI RegQueryMultipleValuesW( HKEY hkey, PVALENTW val_list, DWORD num_vals,
 820                                      LPWSTR lpValueBuf, LPDWORD ldwTotsize )
 821 {
 822     unsigned int i;
 823     DWORD maxBytes = *ldwTotsize;
 824     HRESULT status;
 825     LPSTR bufptr = (LPSTR)lpValueBuf;
 826     *ldwTotsize = 0;
 827
 828     TRACE("(%p,%p,%d,%p,%p=%d)\n", hkey, val_list, num_vals, lpValueBuf, ldwTotsize, *ldwTotsize);
 829
 830     for(i=0; i < num_vals; ++i)
 831     {
 832         val_list[i].ve_valuelen=0;
 833         status = RegQueryValueExW(hkey, val_list[i].ve_valuename, NULL, NULL, NULL, &val_list[i].ve_valuelen);
 834         if(status != ERROR_SUCCESS)
 835         {
 836             return status;
 837         }
 838
 839         if(lpValueBuf != NULL && *ldwTotsize + val_list[i].ve_valuelen <= maxBytes)
 840         {
 841             status = RegQueryValueExW(hkey, val_list[i].ve_valuename, NULL, &val_list[i].ve_type,
 842                                       (LPBYTE)bufptr, &val_list[i].ve_valuelen);
 843             if(status != ERROR_SUCCESS)
 844             {
 845                 return status;
 846             }
 847
 848             val_list[i].ve_valueptr = (DWORD_PTR)bufptr;
 849
 850             bufptr += val_list[i].ve_valuelen;
 851         }
 852
 853         *ldwTotsize += val_list[i].ve_valuelen;
 854     }
 855     return lpValueBuf != NULL && *ldwTotsize <= maxBytes ? ERROR_SUCCESS : ERROR_MORE_DATA;
 856 }
 857
 858 /******************************************************************************
 859  * RegQueryInfoKeyA   [ADVAPI32.@]
 860  *
 861  * Retrieves information about a registry key.
 862  *
 863  * PARAMS
 864  *  hKey                   [I] Handle to an open key.
 865  *  lpClass                [O] Class string of the key.
 866  *  lpcClass               [I/O] size of lpClass.
 867  *  lpReserved             [I] Reserved; must be NULL.
 868  *  lpcSubKeys             [O] Number of subkeys contained by the key.
 869  *  lpcMaxSubKeyLen        [O] Size of the key's subkey with the longest name.
 870  *  lpcMaxClassLen         [O] Size of the longest string specifying a subkey
 871  *                             class in TCHARS.
 872  *  lpcValues              [O] Number of values associated with the key.
 873  *  lpcMaxValueNameLen     [O] Size of the key's longest value name in TCHARS.
 874  *  lpcMaxValueLen         [O] Longest data component among the key's values
 875  *  lpcbSecurityDescriptor [O] Size of the key's security descriptor.
 876  *  lpftLastWriteTime      [O] FILETIME structure that is the last write time.
 877  *
 878  *  RETURNS
 879  *   Success: ERROR_SUCCESS
 880  *   Failure: nonzero error code from Winerror.h
 881  */
 882 LSTATUS WINAPI RegQueryInfoKeyA( HKEY hkey, LPSTR class, LPDWORD class_len, LPDWORD reserved,
 883                               LPDWORD subkeys, LPDWORD max_subkey, LPDWORD max_class,
 884                               LPDWORD values, LPDWORD max_value, LPDWORD max_data,
 885                               LPDWORD security, FILETIME *modif )
 886 {
 887     NTSTATUS status;
 888     char buffer[256], *buf_ptr = buffer;
 889     KEY_FULL_INFORMATION *info = (KEY_FULL_INFORMATION *)buffer;
 890     DWORD total_size, len;
 891
 892     TRACE( "(%p,%p,%d,%p,%p,%p,%p,%p,%p,%p,%p)\n", hkey, class, class_len ? *class_len : 0,
 893            reserved, subkeys, max_subkey, values, max_value, max_data, security, modif );
 894
 895     if (class && !class_len && is_version_nt()) return ERROR_INVALID_PARAMETER;
 896     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 897
 898     status = NtQueryKey( hkey, KeyFullInformation, buffer, sizeof(buffer), &total_size );
 899     if (status && status != STATUS_BUFFER_OVERFLOW) goto done;
 900
 901     if (class || class_len)
 902     {
 903         /* retry with a dynamically allocated buffer */
 904         while (status == STATUS_BUFFER_OVERFLOW)
 905         {
 906             if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 907             if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
 908                 return ERROR_NOT_ENOUGH_MEMORY;
 909             info = (KEY_FULL_INFORMATION *)buf_ptr;
 910             status = NtQueryKey( hkey, KeyFullInformation, buf_ptr, total_size, &total_size );
 911         }
 912
 913         if (status) goto done;
 914
 915         RtlUnicodeToMultiByteSize( &len, (WCHAR *)(buf_ptr + info->ClassOffset), info->ClassLength);
 916         if (class_len)
 917         {
 918             if (len + 1 > *class_len) status = STATUS_BUFFER_OVERFLOW;
 919             *class_len = len;
 920         }
 921         if (class && !status)
 922         {
 923             RtlUnicodeToMultiByteN( class, len, NULL, (WCHAR *)(buf_ptr + info->ClassOffset),
 924                                     info->ClassLength );
 925             class[len] = 0;
 926         }
 927     }
 928     else status = STATUS_SUCCESS;
 929
 930     if (subkeys) *subkeys = info->SubKeys;
 931     if (max_subkey) *max_subkey = info->MaxNameLen;
 932     if (max_class) *max_class = info->MaxClassLen;
 933     if (values) *values = info->Values;
 934     if (max_value) *max_value = info->MaxValueNameLen;
 935     if (max_data) *max_data = info->MaxValueDataLen;
 936     if (modif) *modif = *(FILETIME *)&info->LastWriteTime;
 937
 938  done:
 939     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
 940     return RtlNtStatusToDosError( status );
 941 }
 942
 943
 944 /******************************************************************************
 945  * RegCloseKey   [ADVAPI32.@]
 946  *
 947  * Close an open registry key.
 948  *
 949  * PARAMS
 950  *  hkey [I] Handle of key to close
 951  *
 952  * RETURNS
 953  *  Success: ERROR_SUCCESS
 954  *  Failure: Error code
 955  */
 956 LSTATUS WINAPI RegCloseKey( HKEY hkey )
 957 {
 958     if (!hkey) return ERROR_INVALID_HANDLE;
 959     if (hkey >= (HKEY)0x80000000) return ERROR_SUCCESS;
 960     return RtlNtStatusToDosError( NtClose( hkey ) );
 961 }
 962
 963
 964 /******************************************************************************
 965  * RegDeleteKeyExW   [ADVAPI32.@]
 966  */
 967 LSTATUS WINAPI RegDeleteKeyExW( HKEY hkey, LPCWSTR name, REGSAM access, DWORD reserved )
 968 {
 969     DWORD ret;
 970     HKEY tmp;
 971
 972     if (!name) return ERROR_INVALID_PARAMETER;
 973
 974     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
 975
 976     access &= KEY_WOW64_64KEY | KEY_WOW64_32KEY;
 977     if (!(ret = RegOpenKeyExW( hkey, name, 0, access | DELETE, &tmp )))
 978     {
 979         ret = RtlNtStatusToDosError( NtDeleteKey( tmp ) );
 980         RegCloseKey( tmp );
 981     }
 982     TRACE("%s ret=%08x\n", debugstr_w(name), ret);
 983     return ret;
 984 }
 985
 986
 987 /******************************************************************************
 988  * RegDeleteKeyW   [ADVAPI32.@]
 989  *
 990  * See RegDeleteKeyA.
 991  */
 992 LSTATUS WINAPI RegDeleteKeyW( HKEY hkey, LPCWSTR name )
 993 {
 994     return RegDeleteKeyExW( hkey, name, 0, 0 );
 995 }
 996
 997
 998 /******************************************************************************
 999  * RegDeleteKeyExA   [ADVAPI32.@]
1000  */
1001 LSTATUS WINAPI RegDeleteKeyExA( HKEY hkey, LPCSTR name, REGSAM access, DWORD reserved )
1002 {
1003     DWORD ret;
1004     HKEY tmp;
1005
1006     if (!name) return ERROR_INVALID_PARAMETER;
1007
1008     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1009
1010     access &= KEY_WOW64_64KEY | KEY_WOW64_32KEY;
1011     if (!(ret = RegOpenKeyExA( hkey, name, 0, access | DELETE, &tmp )))
1012     {
1013         if (!is_version_nt()) /* win95 does recursive key deletes */
1014         {
1015             CHAR name[MAX_PATH];
1016
1017             while(!RegEnumKeyA(tmp, 0, name, sizeof(name)))
1018             {
1019                 if(RegDeleteKeyExA(tmp, name, access, reserved))  /* recurse */
1020                     break;
1021             }
1022         }
1023         ret = RtlNtStatusToDosError( NtDeleteKey( tmp ) );
1024         RegCloseKey( tmp );
1025     }
1026     TRACE("%s ret=%08x\n", debugstr_a(name), ret);
1027     return ret;
1028 }
1029
1030
1031 /******************************************************************************
1032  * RegDeleteKeyA   [ADVAPI32.@]
1033  *
1034  * Delete a registry key.
1035  *
1036  * PARAMS
1037  *  hkey   [I] Handle to parent key containing the key to delete
1038  *  name   [I] Name of the key user hkey to delete
1039  *
1040  * NOTES
1041  *
1042  * MSDN is wrong when it says that hkey must be opened with the DELETE access
1043  * right. In reality, it opens a new handle with DELETE access.
1044  *
1045  * RETURNS
1046  *  Success: ERROR_SUCCESS
1047  *  Failure: Error code
1048  */
1049 LSTATUS WINAPI RegDeleteKeyA( HKEY hkey, LPCSTR name )
1050 {
1051     return RegDeleteKeyExA( hkey, name, 0, 0 );
1052 }
1053
1054
1055
1056 /******************************************************************************
1057  * RegSetValueExW   [ADVAPI32.@]
1058  *
1059  * Set the data and contents of a registry value.
1060  *
1061  * PARAMS
1062  *  hkey       [I] Handle of key to set value for
1063  *  name       [I] Name of value to set
1064  *  reserved   [I] Reserved, must be zero
1065  *  type       [I] Type of the value being set
1066  *  data       [I] The new contents of the value to set
1067  *  count      [I] Size of data
1068  *
1069  * RETURNS
1070  *  Success: ERROR_SUCCESS
1071  *  Failure: Error code
1072  */
1073 LSTATUS WINAPI RegSetValueExW( HKEY hkey, LPCWSTR name, DWORD reserved,
1074                             DWORD type, CONST BYTE *data, DWORD count )
1075 {
1076     UNICODE_STRING nameW;
1077
1078     /* no need for version check, not implemented on win9x anyway */
1079     if (count && is_string(type))
1080     {
1081         LPCWSTR str = (LPCWSTR)data;
1082         /* if user forgot to count terminating null, add it (yes NT does this) */
1083         if (str[count / sizeof(WCHAR) - 1] && !str[count / sizeof(WCHAR)])
1084             count += sizeof(WCHAR);
1085     }
1086     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1087
1088     RtlInitUnicodeString( &nameW, name );
1089     return RtlNtStatusToDosError( NtSetValueKey( hkey, &nameW, 0, type, data, count ) );
1090 }
1091
1092
1093 /******************************************************************************
1094  * RegSetValueExA   [ADVAPI32.@]
1095  *
1096  * See RegSetValueExW.
1097  *
1098  * NOTES
1099  *  win95 does not care about count for REG_SZ and finds out the len by itself (js)
1100  *  NT does definitely care (aj)
1101  */
1102 LSTATUS WINAPI RegSetValueExA( HKEY hkey, LPCSTR name, DWORD reserved, DWORD type,
1103                             CONST BYTE *data, DWORD count )
1104 {
1105     ANSI_STRING nameA;
1106     UNICODE_STRING nameW;
1107     WCHAR *dataW = NULL;
1108     NTSTATUS status;
1109
1110     if (!is_version_nt())  /* win95 */
1111     {
1112         if (type == REG_SZ)
1113         {
1114             if (!data) return ERROR_INVALID_PARAMETER;
1115             count = strlen((const char *)data) + 1;
1116         }
1117     }
1118     else if (count && is_string(type))
1119     {
1120         /* if user forgot to count terminating null, add it (yes NT does this) */
1121         if (data[count-1] && !data[count]) count++;
1122     }
1123
1124     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1125
1126     if (is_string( type )) /* need to convert to Unicode */
1127     {
1128         DWORD lenW;
1129         RtlMultiByteToUnicodeSize( &lenW, (const char *)data, count );
1130         if (!(dataW = HeapAlloc( GetProcessHeap(), 0, lenW ))) return ERROR_OUTOFMEMORY;
1131         RtlMultiByteToUnicodeN( dataW, lenW, NULL, (const char *)data, count );
1132         count = lenW;
1133         data = (BYTE *)dataW;
1134     }
1135
1136     RtlInitAnsiString( &nameA, name );
1137     if (!(status = RtlAnsiStringToUnicodeString( &nameW, &nameA, TRUE )))
1138     {
1139         status = NtSetValueKey( hkey, &nameW, 0, type, data, count );
1140         RtlFreeUnicodeString( &nameW );
1141     }
1142     HeapFree( GetProcessHeap(), 0, dataW );
1143     return RtlNtStatusToDosError( status );
1144 }
1145
1146
1147 /******************************************************************************
1148  * RegSetValueW   [ADVAPI32.@]
1149  *
1150  * Sets the data for the default or unnamed value of a reg key.
1151  *
1152  * PARAMS
1153  *  hKey     [I] Handle to an open key.
1154  *  lpSubKey [I] Name of a subkey of hKey.
1155  *  dwType   [I] Type of information to store.
1156  *  lpData   [I] String that contains the data to set for the default value.
1157  *  cbData   [I] Ignored.
1158  *
1159  * RETURNS
1160  *  Success: ERROR_SUCCESS
1161  *  Failure: nonzero error code from Winerror.h
1162  */
1163 LSTATUS WINAPI RegSetValueW( HKEY hkey, LPCWSTR name, DWORD type, LPCWSTR data, DWORD count )
1164 {
1165     HKEY subkey = hkey;
1166     DWORD ret;
1167
1168     TRACE("(%p,%s,%d,%s,%d)\n", hkey, debugstr_w(name), type, debugstr_w(data), count );
1169
1170     if (type != REG_SZ || !data) return ERROR_INVALID_PARAMETER;
1171
1172     if (name && name[0])  /* need to create the subkey */
1173     {
1174         if ((ret = RegCreateKeyW( hkey, name, &subkey )) != ERROR_SUCCESS) return ret;
1175     }
1176
1177     ret = RegSetValueExW( subkey, NULL, 0, REG_SZ, (const BYTE*)data,
1178                           (strlenW( data ) + 1) * sizeof(WCHAR) );
1179     if (subkey != hkey) RegCloseKey( subkey );
1180     return ret;
1181 }
1182
1183
1184 /******************************************************************************
1185  * RegSetValueA   [ADVAPI32.@]
1186  *
1187  * See RegSetValueW.
1188  */
1189 LSTATUS WINAPI RegSetValueA( HKEY hkey, LPCSTR name, DWORD type, LPCSTR data, DWORD count )
1190 {
1191     HKEY subkey = hkey;
1192     DWORD ret;
1193
1194     TRACE("(%p,%s,%d,%s,%d)\n", hkey, debugstr_a(name), type, debugstr_a(data), count );
1195
1196     if (type != REG_SZ || !data) return ERROR_INVALID_PARAMETER;
1197
1198     if (name && name[0])  /* need to create the subkey */
1199     {
1200         if ((ret = RegCreateKeyA( hkey, name, &subkey )) != ERROR_SUCCESS) return ret;
1201     }
1202     ret = RegSetValueExA( subkey, NULL, 0, REG_SZ, (const BYTE*)data, strlen(data)+1 );
1203     if (subkey != hkey) RegCloseKey( subkey );
1204     return ret;
1205 }
1206
1207
1208
1209 /******************************************************************************
1210  * RegQueryValueExW   [ADVAPI32.@]
1211  *
1212  * See RegQueryValueExA.
1213  */
1214 LSTATUS WINAPI RegQueryValueExW( HKEY hkey, LPCWSTR name, LPDWORD reserved, LPDWORD type,
1215                               LPBYTE data, LPDWORD count )
1216 {
1217     NTSTATUS status;
1218     UNICODE_STRING name_str;
1219     DWORD total_size;
1220     char buffer[256], *buf_ptr = buffer;
1221     KEY_VALUE_PARTIAL_INFORMATION *info = (KEY_VALUE_PARTIAL_INFORMATION *)buffer;
1222     static const int info_size = offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data );
1223
1224     TRACE("(%p,%s,%p,%p,%p,%p=%d)\n",
1225           hkey, debugstr_w(name), reserved, type, data, count,
1226           (count && data) ? *count : 0 );
1227
1228     if ((data && !count) || reserved) return ERROR_INVALID_PARAMETER;
1229     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1230
1231     RtlInitUnicodeString( &name_str, name );
1232
1233     if (data) total_size = min( sizeof(buffer), *count + info_size );
1234     else
1235     {
1236         total_size = info_size;
1237         if (count) *count = 0;
1238     }
1239
1240     status = NtQueryValueKey( hkey, &name_str, KeyValuePartialInformation,
1241                               buffer, total_size, &total_size );
1242     if (status && status != STATUS_BUFFER_OVERFLOW) goto done;
1243
1244     if (data)
1245     {
1246         /* retry with a dynamically allocated buffer */
1247         while (status == STATUS_BUFFER_OVERFLOW && total_size - info_size <= *count)
1248         {
1249             if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1250             if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
1251                 return ERROR_NOT_ENOUGH_MEMORY;
1252             info = (KEY_VALUE_PARTIAL_INFORMATION *)buf_ptr;
1253             status = NtQueryValueKey( hkey, &name_str, KeyValuePartialInformation,
1254                                       buf_ptr, total_size, &total_size );
1255         }
1256
1257         if (!status)
1258         {
1259             memcpy( data, buf_ptr + info_size, total_size - info_size );
1260             /* if the type is REG_SZ and data is not 0-terminated
1261              * and there is enough space in the buffer NT appends a \0 */
1262             if (total_size - info_size <= *count-sizeof(WCHAR) && is_string(info->Type))
1263             {
1264                 WCHAR *ptr = (WCHAR *)(data + total_size - info_size);
1265                 if (ptr > (WCHAR *)data && ptr[-1]) *ptr = 0;
1266             }
1267         }
1268         else if (status != STATUS_BUFFER_OVERFLOW) goto done;
1269     }
1270     else status = STATUS_SUCCESS;
1271
1272     if (type) *type = info->Type;
1273     if (count) *count = total_size - info_size;
1274
1275  done:
1276     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1277     return RtlNtStatusToDosError(status);
1278 }
1279
1280
1281 /******************************************************************************
1282  * RegQueryValueExA   [ADVAPI32.@]
1283  *
1284  * Get the type and contents of a specified value under with a key.
1285  *
1286  * PARAMS
1287  *  hkey      [I]   Handle of the key to query
1288  *  name      [I]   Name of value under hkey to query
1289  *  reserved  [I]   Reserved - must be NULL
1290  *  type      [O]   Destination for the value type, or NULL if not required
1291  *  data      [O]   Destination for the values contents, or NULL if not required
1292  *  count     [I/O] Size of data, updated with the number of bytes returned
1293  *
1294  * RETURNS
1295  *  Success: ERROR_SUCCESS. *count is updated with the number of bytes copied to data.
1296  *  Failure: ERROR_INVALID_HANDLE, if hkey is invalid.
1297  *           ERROR_INVALID_PARAMETER, if any other parameter is invalid.
1298  *           ERROR_MORE_DATA, if on input *count is too small to hold the contents.
1299  *
1300  * NOTES
1301  *   MSDN states that if data is too small it is partially filled. In reality
1302  *   it remains untouched.
1303  */
1304 LSTATUS WINAPI RegQueryValueExA( HKEY hkey, LPCSTR name, LPDWORD reserved, LPDWORD type,
1305                               LPBYTE data, LPDWORD count )
1306 {
1307     NTSTATUS status;
1308     ANSI_STRING nameA;
1309     UNICODE_STRING nameW;
1310     DWORD total_size, datalen = 0;
1311     char buffer[256], *buf_ptr = buffer;
1312     KEY_VALUE_PARTIAL_INFORMATION *info = (KEY_VALUE_PARTIAL_INFORMATION *)buffer;
1313     static const int info_size = offsetof( KEY_VALUE_PARTIAL_INFORMATION, Data );
1314
1315     TRACE("(%p,%s,%p,%p,%p,%p=%d)\n",
1316           hkey, debugstr_a(name), reserved, type, data, count, count ? *count : 0 );
1317
1318     if ((data && !count) || reserved) return ERROR_INVALID_PARAMETER;
1319     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1320
1321     if (count) datalen = *count;
1322     if (!data && count) *count = 0;
1323
1324     /* this matches Win9x behaviour - NT sets *type to a random value */
1325     if (type) *type = REG_NONE;
1326
1327     RtlInitAnsiString( &nameA, name );
1328     if ((status = RtlAnsiStringToUnicodeString( &nameW, &nameA, TRUE )))
1329         return RtlNtStatusToDosError(status);
1330
1331     status = NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation,
1332                               buffer, sizeof(buffer), &total_size );
1333     if (status && status != STATUS_BUFFER_OVERFLOW) goto done;
1334
1335     /* we need to fetch the contents for a string type even if not requested,
1336      * because we need to compute the length of the ASCII string. */
1337     if (data || is_string(info->Type))
1338     {
1339         /* retry with a dynamically allocated buffer */
1340         while (status == STATUS_BUFFER_OVERFLOW)
1341         {
1342             if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1343             if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
1344             {
1345                 status = STATUS_NO_MEMORY;
1346                 goto done;
1347             }
1348             info = (KEY_VALUE_PARTIAL_INFORMATION *)buf_ptr;
1349             status = NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation,
1350                                       buf_ptr, total_size, &total_size );
1351         }
1352
1353         if (status) goto done;
1354
1355         if (is_string(info->Type))
1356         {
1357             DWORD len;
1358
1359             RtlUnicodeToMultiByteSize( &len, (WCHAR *)(buf_ptr + info_size),
1360                                        total_size - info_size );
1361             if (data && len)
1362             {
1363                 if (len > datalen) status = STATUS_BUFFER_OVERFLOW;
1364                 else
1365                 {
1366                     RtlUnicodeToMultiByteN( (char*)data, len, NULL, (WCHAR *)(buf_ptr + info_size),
1367                                             total_size - info_size );
1368                     /* if the type is REG_SZ and data is not 0-terminated
1369                      * and there is enough space in the buffer NT appends a \0 */
1370                     if (len < datalen && data[len-1]) data[len] = 0;
1371                 }
1372             }
1373             total_size = len + info_size;
1374         }
1375         else if (data)
1376         {
1377             if (total_size - info_size > datalen) status = STATUS_BUFFER_OVERFLOW;
1378             else memcpy( data, buf_ptr + info_size, total_size - info_size );
1379         }
1380     }
1381     else status = STATUS_SUCCESS;
1382
1383     if (type) *type = info->Type;
1384     if (count) *count = total_size - info_size;
1385
1386  done:
1387     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1388     RtlFreeUnicodeString( &nameW );
1389     return RtlNtStatusToDosError(status);
1390 }
1391
1392
1393 /******************************************************************************
1394  * RegQueryValueW   [ADVAPI32.@]
1395  *
1396  * Retrieves the data associated with the default or unnamed value of a key.
1397  *
1398  * PARAMS
1399  *  hkey      [I] Handle to an open key.
1400  *  name      [I] Name of the subkey of hKey.
1401  *  data      [O] Receives the string associated with the default value
1402  *                of the key.
1403  *  count     [I/O] Size of lpValue in bytes.
1404  *
1405  *  RETURNS
1406  *   Success: ERROR_SUCCESS
1407  *   Failure: nonzero error code from Winerror.h
1408  */
1409 LSTATUS WINAPI RegQueryValueW( HKEY hkey, LPCWSTR name, LPWSTR data, LPLONG count )
1410 {
1411     DWORD ret;
1412     HKEY subkey = hkey;
1413
1414     TRACE("(%p,%s,%p,%d)\n", hkey, debugstr_w(name), data, count ? *count : 0 );
1415
1416     if (name && name[0])
1417     {
1418         if ((ret = RegOpenKeyW( hkey, name, &subkey )) != ERROR_SUCCESS) return ret;
1419     }
1420     ret = RegQueryValueExW( subkey, NULL, NULL, NULL, (LPBYTE)data, (LPDWORD)count );
1421     if (subkey != hkey) RegCloseKey( subkey );
1422     if (ret == ERROR_FILE_NOT_FOUND)
1423     {
1424         /* return empty string if default value not found */
1425         if (data) *data = 0;
1426         if (count) *count = sizeof(WCHAR);
1427         ret = ERROR_SUCCESS;
1428     }
1429     return ret;
1430 }
1431
1432
1433 /******************************************************************************
1434  * RegQueryValueA   [ADVAPI32.@]
1435  *
1436  * See RegQueryValueW.
1437  */
1438 LSTATUS WINAPI RegQueryValueA( HKEY hkey, LPCSTR name, LPSTR data, LPLONG count )
1439 {
1440     DWORD ret;
1441     HKEY subkey = hkey;
1442
1443     TRACE("(%p,%s,%p,%d)\n", hkey, debugstr_a(name), data, count ? *count : 0 );
1444
1445     if (name && name[0])
1446     {
1447         if ((ret = RegOpenKeyA( hkey, name, &subkey )) != ERROR_SUCCESS) return ret;
1448     }
1449     ret = RegQueryValueExA( subkey, NULL, NULL, NULL, (LPBYTE)data, (LPDWORD)count );
1450     if (subkey != hkey) RegCloseKey( subkey );
1451     if (ret == ERROR_FILE_NOT_FOUND)
1452     {
1453         /* return empty string if default value not found */
1454         if (data) *data = 0;
1455         if (count) *count = 1;
1456         ret = ERROR_SUCCESS;
1457     }
1458     return ret;
1459 }
1460
1461
1462 /******************************************************************************
1463  * ADVAPI_ApplyRestrictions   [internal]
1464  *
1465  * Helper function for RegGetValueA/W.
1466  */
1467 static VOID ADVAPI_ApplyRestrictions( DWORD dwFlags, DWORD dwType,
1468                                       DWORD cbData, PLONG ret )
1469 {
1470     /* Check if the type is restricted by the passed flags */
1471     if (*ret == ERROR_SUCCESS || *ret == ERROR_MORE_DATA)
1472     {
1473         DWORD dwMask = 0;
1474
1475         switch (dwType)
1476         {
1477         case REG_NONE: dwMask = RRF_RT_REG_NONE; break;
1478         case REG_SZ: dwMask = RRF_RT_REG_SZ; break;
1479         case REG_EXPAND_SZ: dwMask = RRF_RT_REG_EXPAND_SZ; break;
1480         case REG_MULTI_SZ: dwMask = RRF_RT_REG_MULTI_SZ; break;
1481         case REG_BINARY: dwMask = RRF_RT_REG_BINARY; break;
1482         case REG_DWORD: dwMask = RRF_RT_REG_DWORD; break;
1483         case REG_QWORD: dwMask = RRF_RT_REG_QWORD; break;
1484         }
1485
1486         if (dwFlags & dwMask)
1487         {
1488             /* Type is not restricted, check for size mismatch */
1489             if (dwType == REG_BINARY)
1490             {
1491                 DWORD cbExpect = 0;
1492
1493                 if ((dwFlags & RRF_RT_ANY) == RRF_RT_DWORD)
1494                     cbExpect = 4;
1495                 else if ((dwFlags & RRF_RT_ANY) == RRF_RT_QWORD)
1496                     cbExpect = 8;
1497
1498                 if (cbExpect && cbData != cbExpect)
1499                     *ret = ERROR_DATATYPE_MISMATCH;
1500             }
1501         }
1502         else *ret = ERROR_UNSUPPORTED_TYPE;
1503     }
1504 }
1505
1506
1507 /******************************************************************************
1508  * RegGetValueW   [ADVAPI32.@]
1509  *
1510  * Retrieves the type and data for a value name associated with a key,
1511  * optionally expanding its content and restricting its type.
1512  *
1513  * PARAMS
1514  *  hKey      [I] Handle to an open key.
1515  *  pszSubKey [I] Name of the subkey of hKey.
1516  *  pszValue  [I] Name of value under hKey/szSubKey to query.
1517  *  dwFlags   [I] Flags restricting the value type to retrieve.
1518  *  pdwType   [O] Destination for the values type, may be NULL.
1519  *  pvData    [O] Destination for the values content, may be NULL.
1520  *  pcbData   [I/O] Size of pvData, updated with the size in bytes required to
1521  *                  retrieve the whole content, including the trailing '\0'
1522  *                  for strings.
1523  *
1524  * RETURNS
1525  *  Success: ERROR_SUCCESS
1526  *  Failure: nonzero error code from Winerror.h
1527  *
1528  * NOTES
1529  *  - Unless RRF_NOEXPAND is specified, REG_EXPAND_SZ values are automatically
1530  *    expanded and pdwType is set to REG_SZ instead.
1531  *  - Restrictions are applied after expanding, using RRF_RT_REG_EXPAND_SZ
1532  *    without RRF_NOEXPAND is thus not allowed.
1533  *    An exception is the case where RRF_RT_ANY is specified, because then
1534  *    RRF_NOEXPAND is allowed.
1535  */
1536 LSTATUS WINAPI RegGetValueW( HKEY hKey, LPCWSTR pszSubKey, LPCWSTR pszValue,
1537                           DWORD dwFlags, LPDWORD pdwType, PVOID pvData,
1538                           LPDWORD pcbData )
1539 {
1540     DWORD dwType, cbData = pcbData ? *pcbData : 0;
1541     PVOID pvBuf = NULL;
1542     LONG ret;
1543
1544     TRACE("(%p,%s,%s,%d,%p,%p,%p=%d)\n",
1545           hKey, debugstr_w(pszSubKey), debugstr_w(pszValue), dwFlags, pdwType,
1546           pvData, pcbData, cbData);
1547
1548     if (pvData && !pcbData)
1549         return ERROR_INVALID_PARAMETER;
1550     if ((dwFlags & RRF_RT_REG_EXPAND_SZ) && !(dwFlags & RRF_NOEXPAND) &&
1551             ((dwFlags & RRF_RT_ANY) != RRF_RT_ANY))
1552         return ERROR_INVALID_PARAMETER;
1553
1554     if (pszSubKey && pszSubKey[0])
1555     {
1556         ret = RegOpenKeyExW(hKey, pszSubKey, 0, KEY_QUERY_VALUE, &hKey);
1557         if (ret != ERROR_SUCCESS) return ret;
1558     }
1559
1560     ret = RegQueryValueExW(hKey, pszValue, NULL, &dwType, pvData, &cbData);
1561
1562     /* If we are going to expand we need to read in the whole the value even
1563      * if the passed buffer was too small as the expanded string might be
1564      * smaller than the unexpanded one and could fit into cbData bytes. */
1565     if ((ret == ERROR_SUCCESS || ret == ERROR_MORE_DATA) &&
1566         dwType == REG_EXPAND_SZ && !(dwFlags & RRF_NOEXPAND))
1567     {
1568         do {
1569             HeapFree(GetProcessHeap(), 0, pvBuf);
1570
1571             pvBuf = HeapAlloc(GetProcessHeap(), 0, cbData);
1572             if (!pvBuf)
1573             {
1574                 ret = ERROR_NOT_ENOUGH_MEMORY;
1575                 break;
1576             }
1577
1578             if (ret == ERROR_MORE_DATA || !pvData)
1579                 ret = RegQueryValueExW(hKey, pszValue, NULL,
1580                                        &dwType, pvBuf, &cbData);
1581             else
1582             {
1583                 /* Even if cbData was large enough we have to copy the
1584                  * string since ExpandEnvironmentStrings can't handle
1585                  * overlapping buffers. */
1586                 CopyMemory(pvBuf, pvData, cbData);
1587             }
1588
1589             /* Both the type or the value itself could have been modified in
1590              * between so we have to keep retrying until the buffer is large
1591              * enough or we no longer have to expand the value. */
1592         } while (dwType == REG_EXPAND_SZ && ret == ERROR_MORE_DATA);
1593
1594         if (ret == ERROR_SUCCESS)
1595         {
1596             /* Recheck dwType in case it changed since the first call */
1597             if (dwType == REG_EXPAND_SZ)
1598             {
1599                 cbData = ExpandEnvironmentStringsW(pvBuf, pvData,
1600                                                    pcbData ? *pcbData : 0) * sizeof(WCHAR);
1601                 dwType = REG_SZ;
1602                 if(pvData && pcbData && cbData > *pcbData)
1603                     ret = ERROR_MORE_DATA;
1604             }
1605             else if (pvData)
1606                 CopyMemory(pvData, pvBuf, *pcbData);
1607         }
1608
1609         HeapFree(GetProcessHeap(), 0, pvBuf);
1610     }
1611
1612     if (pszSubKey && pszSubKey[0])
1613         RegCloseKey(hKey);
1614
1615     ADVAPI_ApplyRestrictions(dwFlags, dwType, cbData, &ret);
1616
1617     if (pvData && ret != ERROR_SUCCESS && (dwFlags & RRF_ZEROONFAILURE))
1618         ZeroMemory(pvData, *pcbData);
1619
1620     if (pdwType) *pdwType = dwType;
1621     if (pcbData) *pcbData = cbData;
1622
1623     return ret;
1624 }
1625
1626
1627 /******************************************************************************
1628  * RegGetValueA   [ADVAPI32.@]
1629  *
1630  * See RegGetValueW.
1631  */
1632 LSTATUS WINAPI RegGetValueA( HKEY hKey, LPCSTR pszSubKey, LPCSTR pszValue,
1633                           DWORD dwFlags, LPDWORD pdwType, PVOID pvData,
1634                           LPDWORD pcbData )
1635 {
1636     DWORD dwType, cbData = pcbData ? *pcbData : 0;
1637     PVOID pvBuf = NULL;
1638     LONG ret;
1639
1640     TRACE("(%p,%s,%s,%d,%p,%p,%p=%d)\n",
1641           hKey, pszSubKey, pszValue, dwFlags, pdwType, pvData, pcbData,
1642           cbData);
1643
1644     if (pvData && !pcbData)
1645         return ERROR_INVALID_PARAMETER;
1646     if ((dwFlags & RRF_RT_REG_EXPAND_SZ) && !(dwFlags & RRF_NOEXPAND) &&
1647             ((dwFlags & RRF_RT_ANY) != RRF_RT_ANY))
1648         return ERROR_INVALID_PARAMETER;
1649
1650     if (pszSubKey && pszSubKey[0])
1651     {
1652         ret = RegOpenKeyExA(hKey, pszSubKey, 0, KEY_QUERY_VALUE, &hKey);
1653         if (ret != ERROR_SUCCESS) return ret;
1654     }
1655
1656     ret = RegQueryValueExA(hKey, pszValue, NULL, &dwType, pvData, &cbData);
1657
1658     /* If we are going to expand we need to read in the whole the value even
1659      * if the passed buffer was too small as the expanded string might be
1660      * smaller than the unexpanded one and could fit into cbData bytes. */
1661     if ((ret == ERROR_SUCCESS || ret == ERROR_MORE_DATA) &&
1662         dwType == REG_EXPAND_SZ && !(dwFlags & RRF_NOEXPAND))
1663     {
1664         do {
1665             HeapFree(GetProcessHeap(), 0, pvBuf);
1666
1667             pvBuf = HeapAlloc(GetProcessHeap(), 0, cbData);
1668             if (!pvBuf)
1669             {
1670                 ret = ERROR_NOT_ENOUGH_MEMORY;
1671                 break;
1672             }
1673
1674             if (ret == ERROR_MORE_DATA || !pvData)
1675                 ret = RegQueryValueExA(hKey, pszValue, NULL,
1676                                        &dwType, pvBuf, &cbData);
1677             else
1678             {
1679                 /* Even if cbData was large enough we have to copy the
1680                  * string since ExpandEnvironmentStrings can't handle
1681                  * overlapping buffers. */
1682                 CopyMemory(pvBuf, pvData, cbData);
1683             }
1684
1685             /* Both the type or the value itself could have been modified in
1686              * between so we have to keep retrying until the buffer is large
1687              * enough or we no longer have to expand the value. */
1688         } while (dwType == REG_EXPAND_SZ && ret == ERROR_MORE_DATA);
1689
1690         if (ret == ERROR_SUCCESS)
1691         {
1692             /* Recheck dwType in case it changed since the first call */
1693             if (dwType == REG_EXPAND_SZ)
1694             {
1695                 cbData = ExpandEnvironmentStringsA(pvBuf, pvData,
1696                                                    pcbData ? *pcbData : 0);
1697                 dwType = REG_SZ;
1698                 if(pvData && pcbData && cbData > *pcbData)
1699                     ret = ERROR_MORE_DATA;
1700             }
1701             else if (pvData)
1702                 CopyMemory(pvData, pvBuf, *pcbData);
1703         }
1704
1705         HeapFree(GetProcessHeap(), 0, pvBuf);
1706     }
1707
1708     if (pszSubKey && pszSubKey[0])
1709         RegCloseKey(hKey);
1710
1711     ADVAPI_ApplyRestrictions(dwFlags, dwType, cbData, &ret);
1712
1713     if (pvData && ret != ERROR_SUCCESS && (dwFlags & RRF_ZEROONFAILURE))
1714         ZeroMemory(pvData, *pcbData);
1715
1716     if (pdwType) *pdwType = dwType;
1717     if (pcbData) *pcbData = cbData;
1718
1719     return ret;
1720 }
1721
1722
1723 /******************************************************************************
1724  * RegEnumValueW   [ADVAPI32.@]
1725  *
1726  * Enumerates the values for the specified open registry key.
1727  *
1728  * PARAMS
1729  *  hkey       [I] Handle to key to query
1730  *  index      [I] Index of value to query
1731  *  value      [O] Value string
1732  *  val_count  [I/O] Size of value buffer (in wchars)
1733  *  reserved   [I] Reserved
1734  *  type       [O] Type code
1735  *  data       [O] Value data
1736  *  count      [I/O] Size of data buffer (in bytes)
1737  *
1738  * RETURNS
1739  *  Success: ERROR_SUCCESS
1740  *  Failure: nonzero error code from Winerror.h
1741  */
1742
1743 LSTATUS WINAPI RegEnumValueW( HKEY hkey, DWORD index, LPWSTR value, LPDWORD val_count,
1744                            LPDWORD reserved, LPDWORD type, LPBYTE data, LPDWORD count )
1745 {
1746     NTSTATUS status;
1747     DWORD total_size;
1748     char buffer[256], *buf_ptr = buffer;
1749     KEY_VALUE_FULL_INFORMATION *info = (KEY_VALUE_FULL_INFORMATION *)buffer;
1750     static const int info_size = offsetof( KEY_VALUE_FULL_INFORMATION, Name );
1751
1752     TRACE("(%p,%d,%p,%p,%p,%p,%p,%p)\n",
1753           hkey, index, value, val_count, reserved, type, data, count );
1754
1755     /* NT only checks count, not val_count */
1756     if ((data && !count) || reserved) return ERROR_INVALID_PARAMETER;
1757     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1758
1759     total_size = info_size + (MAX_PATH + 1) * sizeof(WCHAR);
1760     if (data) total_size += *count;
1761     total_size = min( sizeof(buffer), total_size );
1762
1763     status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation,
1764                                   buffer, total_size, &total_size );
1765     if (status && status != STATUS_BUFFER_OVERFLOW) goto done;
1766
1767     if (value || data)
1768     {
1769         /* retry with a dynamically allocated buffer */
1770         while (status == STATUS_BUFFER_OVERFLOW)
1771         {
1772             if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1773             if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
1774                 return ERROR_NOT_ENOUGH_MEMORY;
1775             info = (KEY_VALUE_FULL_INFORMATION *)buf_ptr;
1776             status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation,
1777                                           buf_ptr, total_size, &total_size );
1778         }
1779
1780         if (status) goto done;
1781
1782         if (value)
1783         {
1784             if (info->NameLength/sizeof(WCHAR) >= *val_count)
1785             {
1786                 status = STATUS_BUFFER_OVERFLOW;
1787                 goto overflow;
1788             }
1789             memcpy( value, info->Name, info->NameLength );
1790             *val_count = info->NameLength / sizeof(WCHAR);
1791             value[*val_count] = 0;
1792         }
1793
1794         if (data)
1795         {
1796             if (total_size - info->DataOffset > *count)
1797             {
1798                 status = STATUS_BUFFER_OVERFLOW;
1799                 goto overflow;
1800             }
1801             memcpy( data, buf_ptr + info->DataOffset, total_size - info->DataOffset );
1802             if (total_size - info->DataOffset <= *count-sizeof(WCHAR) && is_string(info->Type))
1803             {
1804                 /* if the type is REG_SZ and data is not 0-terminated
1805                  * and there is enough space in the buffer NT appends a \0 */
1806                 WCHAR *ptr = (WCHAR *)(data + total_size - info->DataOffset);
1807                 if (ptr > (WCHAR *)data && ptr[-1]) *ptr = 0;
1808             }
1809         }
1810     }
1811     else status = STATUS_SUCCESS;
1812
1813  overflow:
1814     if (type) *type = info->Type;
1815     if (count) *count = info->DataLength;
1816
1817  done:
1818     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1819     return RtlNtStatusToDosError(status);
1820 }
1821
1822
1823 /******************************************************************************
1824  * RegEnumValueA   [ADVAPI32.@]
1825  *
1826  * See RegEnumValueW.
1827  */
1828 LSTATUS WINAPI RegEnumValueA( HKEY hkey, DWORD index, LPSTR value, LPDWORD val_count,
1829                            LPDWORD reserved, LPDWORD type, LPBYTE data, LPDWORD count )
1830 {
1831     NTSTATUS status;
1832     DWORD total_size;
1833     char buffer[256], *buf_ptr = buffer;
1834     KEY_VALUE_FULL_INFORMATION *info = (KEY_VALUE_FULL_INFORMATION *)buffer;
1835     static const int info_size = offsetof( KEY_VALUE_FULL_INFORMATION, Name );
1836
1837     TRACE("(%p,%d,%p,%p,%p,%p,%p,%p)\n",
1838           hkey, index, value, val_count, reserved, type, data, count );
1839
1840     /* NT only checks count, not val_count */
1841     if ((data && !count) || reserved) return ERROR_INVALID_PARAMETER;
1842     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1843
1844     total_size = info_size + (MAX_PATH + 1) * sizeof(WCHAR);
1845     if (data) total_size += *count;
1846     total_size = min( sizeof(buffer), total_size );
1847
1848     status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation,
1849                                   buffer, total_size, &total_size );
1850     if (status && status != STATUS_BUFFER_OVERFLOW) goto done;
1851
1852     /* we need to fetch the contents for a string type even if not requested,
1853      * because we need to compute the length of the ASCII string. */
1854     if (value || data || is_string(info->Type))
1855     {
1856         /* retry with a dynamically allocated buffer */
1857         while (status == STATUS_BUFFER_OVERFLOW)
1858         {
1859             if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1860             if (!(buf_ptr = HeapAlloc( GetProcessHeap(), 0, total_size )))
1861                 return ERROR_NOT_ENOUGH_MEMORY;
1862             info = (KEY_VALUE_FULL_INFORMATION *)buf_ptr;
1863             status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation,
1864                                           buf_ptr, total_size, &total_size );
1865         }
1866
1867         if (status) goto done;
1868
1869         if (is_string(info->Type))
1870         {
1871             DWORD len;
1872             RtlUnicodeToMultiByteSize( &len, (WCHAR *)(buf_ptr + info->DataOffset),
1873                                        total_size - info->DataOffset );
1874             if (data && len)
1875             {
1876                 if (len > *count) status = STATUS_BUFFER_OVERFLOW;
1877                 else
1878                 {
1879                     RtlUnicodeToMultiByteN( (char*)data, len, NULL, (WCHAR *)(buf_ptr + info->DataOffset),
1880                                             total_size - info->DataOffset );
1881                     /* if the type is REG_SZ and data is not 0-terminated
1882                      * and there is enough space in the buffer NT appends a \0 */
1883                     if (len < *count && data[len-1]) data[len] = 0;
1884                 }
1885             }
1886             info->DataLength = len;
1887         }
1888         else if (data)
1889         {
1890             if (total_size - info->DataOffset > *count) status = STATUS_BUFFER_OVERFLOW;
1891             else memcpy( data, buf_ptr + info->DataOffset, total_size - info->DataOffset );
1892         }
1893
1894         if (value && !status)
1895         {
1896             DWORD len;
1897
1898             RtlUnicodeToMultiByteSize( &len, info->Name, info->NameLength );
1899             if (len >= *val_count)
1900             {
1901                 status = STATUS_BUFFER_OVERFLOW;
1902                 if (*val_count)
1903                 {
1904                     len = *val_count - 1;
1905                     RtlUnicodeToMultiByteN( value, len, NULL, info->Name, info->NameLength );
1906                     value[len] = 0;
1907                 }
1908             }
1909             else
1910             {
1911                 RtlUnicodeToMultiByteN( value, len, NULL, info->Name, info->NameLength );
1912                 value[len] = 0;
1913                 *val_count = len;
1914             }
1915         }
1916     }
1917     else status = STATUS_SUCCESS;
1918
1919     if (type) *type = info->Type;
1920     if (count) *count = info->DataLength;
1921
1922  done:
1923     if (buf_ptr != buffer) HeapFree( GetProcessHeap(), 0, buf_ptr );
1924     return RtlNtStatusToDosError(status);
1925 }
1926
1927
1928
1929 /******************************************************************************
1930  * RegDeleteValueW   [ADVAPI32.@]
1931  *
1932  * See RegDeleteValueA.
1933  */
1934 LSTATUS WINAPI RegDeleteValueW( HKEY hkey, LPCWSTR name )
1935 {
1936     UNICODE_STRING nameW;
1937
1938     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1939
1940     RtlInitUnicodeString( &nameW, name );
1941     return RtlNtStatusToDosError( NtDeleteValueKey( hkey, &nameW ) );
1942 }
1943
1944
1945 /******************************************************************************
1946  * RegDeleteValueA   [ADVAPI32.@]
1947  *
1948  * Delete a value from the registry.
1949  *
1950  * PARAMS
1951  *  hkey [I] Registry handle of the key holding the value
1952  *  name [I] Name of the value under hkey to delete
1953  *
1954  * RETURNS
1955  *  Success: ERROR_SUCCESS
1956  *  Failure: nonzero error code from Winerror.h
1957  */
1958 LSTATUS WINAPI RegDeleteValueA( HKEY hkey, LPCSTR name )
1959 {
1960     ANSI_STRING nameA;
1961     UNICODE_STRING nameW;
1962     NTSTATUS status;
1963
1964     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
1965
1966     RtlInitAnsiString( &nameA, name );
1967     if (!(status = RtlAnsiStringToUnicodeString( &nameW, &nameA, TRUE )))
1968     {
1969         status = NtDeleteValueKey( hkey, &nameW );
1970         RtlFreeUnicodeString( &nameW );
1971     }
1972     return RtlNtStatusToDosError( status );
1973 }
1974
1975
1976 /******************************************************************************
1977  * RegLoadKeyW   [ADVAPI32.@]
1978  *
1979  * Create a subkey under HKEY_USERS or HKEY_LOCAL_MACHINE and store
1980  * registration information from a specified file into that subkey.
1981  *
1982  * PARAMS
1983  *  hkey      [I] Handle of open key
1984  *  subkey    [I] Address of name of subkey
1985  *  filename  [I] Address of filename for registry information
1986  *
1987  * RETURNS
1988  *  Success: ERROR_SUCCESS
1989  *  Failure: nonzero error code from Winerror.h
1990  */
1991 LSTATUS WINAPI RegLoadKeyW( HKEY hkey, LPCWSTR subkey, LPCWSTR filename )
1992 {
1993     OBJECT_ATTRIBUTES destkey, file;
1994     UNICODE_STRING subkeyW, filenameW;
1995     NTSTATUS status;
1996
1997     if (!(hkey = get_special_root_hkey(hkey))) return ERROR_INVALID_HANDLE;
1998
1999     destkey.Length = sizeof(destkey);
2000     destkey.RootDirectory = hkey;               /* root key: HKLM or HKU */
2001     destkey.ObjectName = &subkeyW;              /* name of the key */
2002     destkey.Attributes = 0;
2003     destkey.SecurityDescriptor = NULL;
2004     destkey.SecurityQualityOfService = NULL;
2005     RtlInitUnicodeString(&subkeyW, subkey);
2006
2007     file.Length = sizeof(file);
2008     file.RootDirectory = NULL;
2009     file.ObjectName = &filenameW;               /* file containing the hive */
2010     file.Attributes = OBJ_CASE_INSENSITIVE;
2011     file.SecurityDescriptor = NULL;
2012     file.SecurityQualityOfService = NULL;
2013     RtlDosPathNameToNtPathName_U(filename, &filenameW, NULL, NULL);
2014
2015     status = NtLoadKey(&destkey, &file);
2016     RtlFreeUnicodeString(&filenameW);
2017     return RtlNtStatusToDosError( status );
2018 }
2019
2020
2021 /******************************************************************************
2022  * RegLoadKeyA   [ADVAPI32.@]
2023  *
2024  * See RegLoadKeyW.
2025  */
2026 LSTATUS WINAPI RegLoadKeyA( HKEY hkey, LPCSTR subkey, LPCSTR filename )
2027 {
2028     UNICODE_STRING subkeyW, filenameW;
2029     STRING subkeyA, filenameA;
2030     NTSTATUS status;
2031     LONG ret;
2032
2033     RtlInitAnsiString(&subkeyA, subkey);
2034     RtlInitAnsiString(&filenameA, filename);
2035
2036     RtlInitUnicodeString(&subkeyW, NULL);
2037     RtlInitUnicodeString(&filenameW, NULL);
2038     if (!(status = RtlAnsiStringToUnicodeString(&subkeyW, &subkeyA, TRUE)) &&
2039         !(status = RtlAnsiStringToUnicodeString(&filenameW, &filenameA, TRUE)))
2040     {
2041         ret = RegLoadKeyW(hkey, subkeyW.Buffer, filenameW.Buffer);
2042     }
2043     else ret = RtlNtStatusToDosError(status);
2044     RtlFreeUnicodeString(&subkeyW);
2045     RtlFreeUnicodeString(&filenameW);
2046     return ret;
2047 }
2048
2049
2050 /******************************************************************************
2051  * RegSaveKeyW   [ADVAPI32.@]
2052  *
2053  * Save a key and all of its subkeys and values to a new file in the standard format.
2054  *
2055  * PARAMS
2056  *  hkey   [I] Handle of key where save begins
2057  *  lpFile [I] Address of filename to save to
2058  *  sa     [I] Address of security structure
2059  *
2060  * RETURNS
2061  *  Success: ERROR_SUCCESS
2062  *  Failure: nonzero error code from Winerror.h
2063  */
2064 LSTATUS WINAPI RegSaveKeyW( HKEY hkey, LPCWSTR file, LPSECURITY_ATTRIBUTES sa )
2065 {
2066     static const WCHAR format[] =
2067         {'r','e','g','%','0','4','x','.','t','m','p',0};
2068     WCHAR buffer[MAX_PATH];
2069     int count = 0;
2070     LPWSTR nameW;
2071     DWORD ret, err;
2072     HANDLE handle;
2073
2074     TRACE( "(%p,%s,%p)\n", hkey, debugstr_w(file), sa );
2075
2076     if (!file || !*file) return ERROR_INVALID_PARAMETER;
2077     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
2078
2079     err = GetLastError();
2080     GetFullPathNameW( file, sizeof(buffer)/sizeof(WCHAR), buffer, &nameW );
2081
2082     for (;;)
2083     {
2084         snprintfW( nameW, 16, format, count++ );
2085         handle = CreateFileW( buffer, GENERIC_WRITE, 0, NULL,
2086                             CREATE_NEW, FILE_ATTRIBUTE_NORMAL, 0 );
2087         if (handle != INVALID_HANDLE_VALUE) break;
2088         if ((ret = GetLastError()) != ERROR_FILE_EXISTS) goto done;
2089
2090         /* Something gone haywire ? Please report if this happens abnormally */
2091         if (count >= 100)
2092             MESSAGE("Wow, we are already fiddling with a temp file %s with an ordinal as high as %d !\nYou might want to delete all corresponding temp files in that directory.\n", debugstr_w(buffer), count);
2093     }
2094
2095     ret = RtlNtStatusToDosError(NtSaveKey(hkey, handle));
2096
2097     CloseHandle( handle );
2098     if (!ret)
2099     {
2100         if (!MoveFileExW( buffer, file, MOVEFILE_REPLACE_EXISTING ))
2101         {
2102             ERR( "Failed to move %s to %s\n", debugstr_w(buffer),
2103                 debugstr_w(file) );
2104             ret = GetLastError();
2105         }
2106     }
2107     if (ret) DeleteFileW( buffer );
2108
2109 done:
2110     SetLastError( err );  /* restore last error code */
2111     return ret;
2112 }
2113
2114
2115 /******************************************************************************
2116  * RegSaveKeyA  [ADVAPI32.@]
2117  *
2118  * See RegSaveKeyW.
2119  */
2120 LSTATUS WINAPI RegSaveKeyA( HKEY hkey, LPCSTR file, LPSECURITY_ATTRIBUTES sa )
2121 {
2122     UNICODE_STRING *fileW = &NtCurrentTeb()->StaticUnicodeString;
2123     NTSTATUS status;
2124     STRING fileA;
2125
2126     RtlInitAnsiString(&fileA, file);
2127     if ((status = RtlAnsiStringToUnicodeString(fileW, &fileA, FALSE)))
2128         return RtlNtStatusToDosError( status );
2129     return RegSaveKeyW(hkey, fileW->Buffer, sa);
2130 }
2131
2132
2133 /******************************************************************************
2134  * RegRestoreKeyW [ADVAPI32.@]
2135  *
2136  * Read the registry information from a file and copy it over a key.
2137  *
2138  * PARAMS
2139  *  hkey    [I] Handle of key where restore begins
2140  *  lpFile  [I] Address of filename containing saved tree
2141  *  dwFlags [I] Optional flags
2142  *
2143  * RETURNS
2144  *  Success: ERROR_SUCCESS
2145  *  Failure: nonzero error code from Winerror.h
2146  */
2147 LSTATUS WINAPI RegRestoreKeyW( HKEY hkey, LPCWSTR lpFile, DWORD dwFlags )
2148 {
2149     TRACE("(%p,%s,%d)\n",hkey,debugstr_w(lpFile),dwFlags);
2150
2151     /* It seems to do this check before the hkey check */
2152     if (!lpFile || !*lpFile)
2153         return ERROR_INVALID_PARAMETER;
2154
2155     FIXME("(%p,%s,%d): stub\n",hkey,debugstr_w(lpFile),dwFlags);
2156
2157     /* Check for file existence */
2158
2159     return ERROR_SUCCESS;
2160 }
2161
2162
2163 /******************************************************************************
2164  * RegRestoreKeyA [ADVAPI32.@]
2165  *
2166  * See RegRestoreKeyW.
2167  */
2168 LSTATUS WINAPI RegRestoreKeyA( HKEY hkey, LPCSTR lpFile, DWORD dwFlags )
2169 {
2170     UNICODE_STRING lpFileW;
2171     LONG ret;
2172
2173     RtlCreateUnicodeStringFromAsciiz( &lpFileW, lpFile );
2174     ret = RegRestoreKeyW( hkey, lpFileW.Buffer, dwFlags );
2175     RtlFreeUnicodeString( &lpFileW );
2176     return ret;
2177 }
2178
2179
2180 /******************************************************************************
2181  * RegUnLoadKeyW [ADVAPI32.@]
2182  *
2183  * Unload a registry key and its subkeys from the registry.
2184  *
2185  * PARAMS
2186  *  hkey     [I] Handle of open key
2187  *  lpSubKey [I] Address of name of subkey to unload
2188  *
2189  * RETURNS
2190  *  Success: ERROR_SUCCESS
2191  *  Failure: nonzero error code from Winerror.h
2192  */
2193 LSTATUS WINAPI RegUnLoadKeyW( HKEY hkey, LPCWSTR lpSubKey )
2194 {
2195     DWORD ret;
2196     HKEY shkey;
2197     OBJECT_ATTRIBUTES attr;
2198     UNICODE_STRING subkey;
2199
2200     TRACE("(%p,%s)\n",hkey, debugstr_w(lpSubKey));
2201
2202     ret = RegOpenKeyW(hkey,lpSubKey,&shkey);
2203     if( ret )
2204         return ERROR_INVALID_PARAMETER;
2205
2206     RtlInitUnicodeString(&subkey, lpSubKey);
2207     InitializeObjectAttributes(&attr, &subkey, OBJ_CASE_INSENSITIVE, shkey, NULL);
2208     ret = RtlNtStatusToDosError(NtUnloadKey(&attr));
2209
2210     RegCloseKey(shkey);
2211
2212     return ret;
2213 }
2214
2215
2216 /******************************************************************************
2217  * RegUnLoadKeyA [ADVAPI32.@]
2218  *
2219  * See RegUnLoadKeyW.
2220  */
2221 LSTATUS WINAPI RegUnLoadKeyA( HKEY hkey, LPCSTR lpSubKey )
2222 {
2223     UNICODE_STRING lpSubKeyW;
2224     LONG ret;
2225
2226     RtlCreateUnicodeStringFromAsciiz( &lpSubKeyW, lpSubKey );
2227     ret = RegUnLoadKeyW( hkey, lpSubKeyW.Buffer );
2228     RtlFreeUnicodeString( &lpSubKeyW );
2229     return ret;
2230 }
2231
2232
2233 /******************************************************************************
2234  * RegReplaceKeyW [ADVAPI32.@]
2235  *
2236  * Replace the file backing a registry key and all its subkeys with another file.
2237  *
2238  * PARAMS
2239  *  hkey      [I] Handle of open key
2240  *  lpSubKey  [I] Address of name of subkey
2241  *  lpNewFile [I] Address of filename for file with new data
2242  *  lpOldFile [I] Address of filename for backup file
2243  *
2244  * RETURNS
2245  *  Success: ERROR_SUCCESS
2246  *  Failure: nonzero error code from Winerror.h
2247  */
2248 LSTATUS WINAPI RegReplaceKeyW( HKEY hkey, LPCWSTR lpSubKey, LPCWSTR lpNewFile,
2249                               LPCWSTR lpOldFile )
2250 {
2251     FIXME("(%p,%s,%s,%s): stub\n", hkey, debugstr_w(lpSubKey),
2252           debugstr_w(lpNewFile),debugstr_w(lpOldFile));
2253     return ERROR_SUCCESS;
2254 }
2255
2256
2257 /******************************************************************************
2258  * RegReplaceKeyA [ADVAPI32.@]
2259  *
2260  * See RegReplaceKeyW.
2261  */
2262 LSTATUS WINAPI RegReplaceKeyA( HKEY hkey, LPCSTR lpSubKey, LPCSTR lpNewFile,
2263                               LPCSTR lpOldFile )
2264 {
2265     UNICODE_STRING lpSubKeyW;
2266     UNICODE_STRING lpNewFileW;
2267     UNICODE_STRING lpOldFileW;
2268     LONG ret;
2269
2270     RtlCreateUnicodeStringFromAsciiz( &lpSubKeyW, lpSubKey );
2271     RtlCreateUnicodeStringFromAsciiz( &lpOldFileW, lpOldFile );
2272     RtlCreateUnicodeStringFromAsciiz( &lpNewFileW, lpNewFile );
2273     ret = RegReplaceKeyW( hkey, lpSubKeyW.Buffer, lpNewFileW.Buffer, lpOldFileW.Buffer );
2274     RtlFreeUnicodeString( &lpOldFileW );
2275     RtlFreeUnicodeString( &lpNewFileW );
2276     RtlFreeUnicodeString( &lpSubKeyW );
2277     return ret;
2278 }
2279
2280
2281 /******************************************************************************
2282  * RegSetKeySecurity [ADVAPI32.@]
2283  *
2284  * Set the security of an open registry key.
2285  *
2286  * PARAMS
2287  *  hkey          [I] Open handle of key to set
2288  *  SecurityInfo  [I] Descriptor contents
2289  *  pSecurityDesc [I] Address of descriptor for key
2290  *
2291  * RETURNS
2292  *  Success: ERROR_SUCCESS
2293  *  Failure: nonzero error code from Winerror.h
2294  */
2295 LSTATUS WINAPI RegSetKeySecurity( HKEY hkey, SECURITY_INFORMATION SecurityInfo,
2296                                PSECURITY_DESCRIPTOR pSecurityDesc )
2297 {
2298     TRACE("(%p,%d,%p)\n",hkey,SecurityInfo,pSecurityDesc);
2299
2300     /* It seems to perform this check before the hkey check */
2301     if ((SecurityInfo & OWNER_SECURITY_INFORMATION) ||
2302         (SecurityInfo & GROUP_SECURITY_INFORMATION) ||
2303         (SecurityInfo & DACL_SECURITY_INFORMATION) ||
2304         (SecurityInfo & SACL_SECURITY_INFORMATION)) {
2305         /* Param OK */
2306     } else
2307         return ERROR_INVALID_PARAMETER;
2308
2309     if (!pSecurityDesc)
2310         return ERROR_INVALID_PARAMETER;
2311
2312     FIXME(":(%p,%d,%p): stub\n",hkey,SecurityInfo,pSecurityDesc);
2313
2314     return ERROR_SUCCESS;
2315 }
2316
2317
2318 /******************************************************************************
2319  * RegGetKeySecurity [ADVAPI32.@]
2320  *
2321  * Get a copy of the security descriptor for a given registry key.
2322  *
2323  * PARAMS
2324  *  hkey                   [I]   Open handle of key to set
2325  *  SecurityInformation    [I]   Descriptor contents
2326  *  pSecurityDescriptor    [O]   Address of descriptor for key
2327  *  lpcbSecurityDescriptor [I/O] Address of size of buffer and description
2328  *
2329  * RETURNS
2330  *  Success: ERROR_SUCCESS
2331  *  Failure: Error code
2332  */
2333 LSTATUS WINAPI RegGetKeySecurity( HKEY hkey, SECURITY_INFORMATION SecurityInformation,
2334                                PSECURITY_DESCRIPTOR pSecurityDescriptor,
2335                                LPDWORD lpcbSecurityDescriptor )
2336 {
2337     TRACE("(%p,%d,%p,%d)\n",hkey,SecurityInformation,pSecurityDescriptor,
2338           *lpcbSecurityDescriptor);
2339
2340     if (!(hkey = get_special_root_hkey( hkey ))) return ERROR_INVALID_HANDLE;
2341
2342     return RtlNtStatusToDosError( NtQuerySecurityObject( hkey,
2343                 SecurityInformation, pSecurityDescriptor,
2344                 *lpcbSecurityDescriptor, lpcbSecurityDescriptor ) );
2345 }
2346
2347
2348 /******************************************************************************
2349  * RegFlushKey [ADVAPI32.@]
2350  *
2351  * Immediately write a registry key to registry.
2352  *
2353  * PARAMS
2354  *  hkey [I] Handle of key to write
2355  *
2356  * RETURNS
2357  *  Success: ERROR_SUCCESS
2358  *  Failure: Error code
2359  */
2360 LSTATUS WINAPI RegFlushKey( HKEY hkey )
2361 {
2362     hkey = get_special_root_hkey( hkey );
2363     if (!hkey) return ERROR_INVALID_HANDLE;
2364
2365     return RtlNtStatusToDosError( NtFlushKey( hkey ) );
2366 }
2367
2368
2369 /******************************************************************************
2370  * RegConnectRegistryW [ADVAPI32.@]
2371  *
2372  * Establish a connection to a predefined registry key on another computer.
2373  *
2374  * PARAMS
2375  *  lpMachineName [I] Address of name of remote computer
2376  *  hHey          [I] Predefined registry handle
2377  *  phkResult     [I] Address of buffer for remote registry handle
2378  *
2379  * RETURNS
2380  *  Success: ERROR_SUCCESS
2381  *  Failure: nonzero error code from Winerror.h
2382  */
2383 LSTATUS WINAPI RegConnectRegistryW( LPCWSTR lpMachineName, HKEY hKey,
2384                                    PHKEY phkResult )
2385 {
2386     LONG ret;
2387
2388     TRACE("(%s,%p,%p): stub\n",debugstr_w(lpMachineName),hKey,phkResult);
2389
2390     if (!lpMachineName || !*lpMachineName) {
2391         /* Use the local machine name */
2392         ret = RegOpenKeyW( hKey, NULL, phkResult );
2393     }
2394     else {
2395         WCHAR compName[MAX_COMPUTERNAME_LENGTH + 1];
2396         DWORD len = sizeof(compName) / sizeof(WCHAR);
2397
2398         /* MSDN says lpMachineName must start with \\ : not so */
2399         if( lpMachineName[0] == '\\' &&  lpMachineName[1] == '\\')
2400             lpMachineName += 2;
2401         if (GetComputerNameW(compName, &len))
2402         {
2403             if (!strcmpiW(lpMachineName, compName))
2404                 ret = RegOpenKeyW(hKey, NULL, phkResult);
2405             else
2406             {
2407                 FIXME("Connect to %s is not supported.\n",debugstr_w(lpMachineName));
2408                 ret = ERROR_BAD_NETPATH;
2409             }
2410         }
2411         else
2412             ret = GetLastError();
2413     }
2414     return ret;
2415 }
2416
2417
2418 /******************************************************************************
2419  * RegConnectRegistryA [ADVAPI32.@]
2420  *
2421  * See RegConnectRegistryW.
2422  */
2423 LSTATUS WINAPI RegConnectRegistryA( LPCSTR machine, HKEY hkey, PHKEY reskey )
2424 {
2425     UNICODE_STRING machineW;
2426     LONG ret;
2427
2428     RtlCreateUnicodeStringFromAsciiz( &machineW, machine );
2429     ret = RegConnectRegistryW( machineW.Buffer, hkey, reskey );
2430     RtlFreeUnicodeString( &machineW );
2431     return ret;
2432 }
2433
2434
2435 /******************************************************************************
2436  * RegNotifyChangeKeyValue [ADVAPI32.@]
2437  *
2438  * Notify the caller about changes to the attributes or contents of a registry key.
2439  *
2440  * PARAMS
2441  *  hkey            [I] Handle of key to watch
2442  *  fWatchSubTree   [I] Flag for subkey notification
2443  *  fdwNotifyFilter [I] Changes to be reported
2444  *  hEvent          [I] Handle of signaled event
2445  *  fAsync          [I] Flag for asynchronous reporting
2446  *
2447  * RETURNS
2448  *  Success: ERROR_SUCCESS
2449  *  Failure: nonzero error code from Winerror.h
2450  */
2451 LSTATUS WINAPI RegNotifyChangeKeyValue( HKEY hkey, BOOL fWatchSubTree,
2452                                      DWORD fdwNotifyFilter, HANDLE hEvent,
2453                                      BOOL fAsync )
2454 {
2455     NTSTATUS status;
2456     IO_STATUS_BLOCK iosb;
2457
2458     hkey = get_special_root_hkey( hkey );
2459     if (!hkey) return ERROR_INVALID_HANDLE;
2460
2461     TRACE("(%p,%i,%d,%p,%i)\n", hkey, fWatchSubTree, fdwNotifyFilter,
2462           hEvent, fAsync);
2463
2464     status = NtNotifyChangeKey( hkey, hEvent, NULL, NULL, &iosb,
2465                                 fdwNotifyFilter, fAsync, NULL, 0,
2466                                 fWatchSubTree);
2467
2468     if (status && status != STATUS_TIMEOUT)
2469         return RtlNtStatusToDosError( status );
2470
2471     return ERROR_SUCCESS;
2472 }
2473
2474 /******************************************************************************
2475  * RegOpenUserClassesRoot [ADVAPI32.@]
2476  *
2477  * Open the HKEY_CLASSES_ROOT key for a user.
2478  *
2479  * PARAMS
2480  *  hToken     [I] Handle of token representing the user
2481  *  dwOptions  [I] Reserved, must be 0
2482  *  samDesired [I] Desired access rights
2483  *  phkResult  [O] Destination for the resulting key handle
2484  *
2485  * RETURNS
2486  *  Success: ERROR_SUCCESS
2487  *  Failure: nonzero error code from Winerror.h
2488  *
2489  * NOTES
2490  *  On Windows 2000 and upwards the HKEY_CLASSES_ROOT key is a view of the
2491  *  "HKEY_LOCAL_MACHINE\Software\Classes" and the
2492  *  "HKEY_CURRENT_USER\Software\Classes" keys merged together.
2493  */
2494 LSTATUS WINAPI RegOpenUserClassesRoot(
2495     HANDLE hToken,
2496     DWORD dwOptions,
2497     REGSAM samDesired,
2498     PHKEY phkResult
2499 )
2500 {
2501     FIXME("(%p, 0x%x, 0x%x, %p) semi-stub\n", hToken, dwOptions, samDesired, phkResult);
2502
2503     *phkResult = HKEY_CLASSES_ROOT;
2504     return ERROR_SUCCESS;
2505 }
2506
2507 /******************************************************************************
2508  * load_string [Internal]
2509  *
2510  * This is basically a copy of user32/resource.c's LoadStringW. Necessary to
2511  * avoid importing user32, which is higher level than advapi32. Helper for
2512  * RegLoadMUIString.
2513  */
2514 static int load_string(HINSTANCE hModule, UINT resId, LPWSTR pwszBuffer, INT cMaxChars)
2515 {
2516     HGLOBAL hMemory;
2517     HRSRC hResource;
2518     WCHAR *pString;
2519     int idxString;
2520
2521     /* Negative values have to be inverted. */
2522     if (HIWORD(resId) == 0xffff)
2523         resId = (UINT)(-((INT)resId));
2524
2525     /* Load the resource into memory and get a pointer to it. */
2526     hResource = FindResourceW(hModule, MAKEINTRESOURCEW(LOWORD(resId >> 4) + 1), (LPWSTR)RT_STRING);
2527     if (!hResource) return 0;
2528     hMemory = LoadResource(hModule, hResource);
2529     if (!hMemory) return 0;
2530     pString = LockResource(hMemory);
2531
2532     /* Strings are length-prefixed. Lowest nibble of resId is an index. */
2533     idxString = resId & 0xf;
2534     while (idxString--) pString += *pString + 1;
2535
2536     /* If no buffer is given, return length of the string. */
2537     if (!pwszBuffer) return *pString;
2538
2539     /* Else copy over the string, respecting the buffer size. */
2540     cMaxChars = (*pString < cMaxChars) ? *pString : (cMaxChars - 1);
2541     if (cMaxChars >= 0) {
2542         memcpy(pwszBuffer, pString+1, cMaxChars * sizeof(WCHAR));
2543         pwszBuffer[cMaxChars] = '\0';
2544     }
2545
2546     return cMaxChars;
2547 }
2548
2549 /******************************************************************************
2550  * RegLoadMUIStringW [ADVAPI32.@]
2551  *
2552  * Load the localized version of a string resource from some PE, respective
2553  * id and path of which are given in the registry value in the format
2554  * @[path]\dllname,-resourceId
2555  *
2556  * PARAMS
2557  *  hKey       [I] Key, of which to load the string value from.
2558  *  pszValue   [I] The value to be loaded (Has to be of REG_EXPAND_SZ or REG_SZ type).
2559  *  pszBuffer  [O] Buffer to store the localized string in.
2560  *  cbBuffer   [I] Size of the destination buffer in bytes.
2561  *  pcbData    [O] Number of bytes written to pszBuffer (optional, may be NULL).
2562  *  dwFlags    [I] None supported yet.
2563  *  pszBaseDir [I] Not supported yet.
2564  *
2565  * RETURNS
2566  *  Success: ERROR_SUCCESS,
2567  *  Failure: nonzero error code from winerror.h
2568  *
2569  * NOTES
2570  *  This is an API of Windows Vista, which wasn't available at the time this code
2571  *  was written. We have to check for the correct behaviour once it's available.
2572  */
2573 LSTATUS WINAPI RegLoadMUIStringW(HKEY hKey, LPCWSTR pwszValue, LPWSTR pwszBuffer, DWORD cbBuffer,
2574     LPDWORD pcbData, DWORD dwFlags, LPCWSTR pwszBaseDir)
2575 {
2576     DWORD dwValueType, cbData;
2577     LPWSTR pwszTempBuffer = NULL, pwszExpandedBuffer = NULL;
2578     LONG result;
2579
2580     TRACE("(hKey = %p, pwszValue = %s, pwszBuffer = %p, cbBuffer = %d, pcbData = %p, "
2581           "dwFlags = %d, pwszBaseDir = %s) stub\n", hKey, debugstr_w(pwszValue), pwszBuffer,
2582           cbBuffer, pcbData, dwFlags, debugstr_w(pwszBaseDir));
2583
2584     /* Parameter sanity checks. */
2585     if (!hKey || !pwszBuffer)
2586         return ERROR_INVALID_PARAMETER;
2587
2588     if (pwszBaseDir && *pwszBaseDir) {
2589         FIXME("BaseDir parameter not yet supported!\n");
2590         return ERROR_INVALID_PARAMETER;
2591     }
2592
2593     /* Check for value existence and correctness of it's type, allocate a buffer and load it. */
2594     result = RegQueryValueExW(hKey, pwszValue, NULL, &dwValueType, NULL, &cbData);
2595     if (result != ERROR_SUCCESS) goto cleanup;
2596     if (!(dwValueType == REG_SZ || dwValueType == REG_EXPAND_SZ) || !cbData) {
2597         result = ERROR_FILE_NOT_FOUND;
2598         goto cleanup;
2599     }
2600     pwszTempBuffer = HeapAlloc(GetProcessHeap(), 0, cbData);
2601     if (!pwszTempBuffer) {
2602         result = ERROR_NOT_ENOUGH_MEMORY;
2603         goto cleanup;
2604     }
2605     result = RegQueryValueExW(hKey, pwszValue, NULL, &dwValueType, (LPBYTE)pwszTempBuffer, &cbData);
2606     if (result != ERROR_SUCCESS) goto cleanup;
2607
2608     /* Expand environment variables, if appropriate, or copy the original string over. */
2609     if (dwValueType == REG_EXPAND_SZ) {
2610         cbData = ExpandEnvironmentStringsW(pwszTempBuffer, NULL, 0) * sizeof(WCHAR);
2611         if (!cbData) goto cleanup;
2612         pwszExpandedBuffer = HeapAlloc(GetProcessHeap(), 0, cbData);
2613         if (!pwszExpandedBuffer) {
2614             result = ERROR_NOT_ENOUGH_MEMORY;
2615             goto cleanup;
2616         }
2617         ExpandEnvironmentStringsW(pwszTempBuffer, pwszExpandedBuffer, cbData);
2618     } else {
2619         pwszExpandedBuffer = HeapAlloc(GetProcessHeap(), 0, cbData);
2620         memcpy(pwszExpandedBuffer, pwszTempBuffer, cbData);
2621     }
2622
2623     /* If the value references a resource based string, parse the value and load the string.
2624      * Else just copy over the original value. */
2625     result = ERROR_SUCCESS;
2626     if (*pwszExpandedBuffer != '@') { /* '@' is the prefix for resource based string entries. */
2627         lstrcpynW(pwszBuffer, pwszExpandedBuffer, cbBuffer / sizeof(WCHAR));
2628     } else {
2629         WCHAR *pComma = strrchrW(pwszExpandedBuffer, ',');
2630         UINT uiStringId;
2631         HMODULE hModule;
2632
2633         /* Format of the expanded value is 'path_to_dll,-resId' */
2634         if (!pComma || pComma[1] != '-') {
2635             result = ERROR_BADKEY;
2636             goto cleanup;
2637         }
2638
2639         uiStringId = atoiW(pComma+2);
2640         *pComma = '\0';
2641
2642         hModule = LoadLibraryW(pwszExpandedBuffer + 1);
2643         if (!hModule || !load_string(hModule, uiStringId, pwszBuffer, cbBuffer/sizeof(WCHAR)))
2644             result = ERROR_BADKEY;
2645         FreeLibrary(hModule);
2646     }
2647
2648 cleanup:
2649     HeapFree(GetProcessHeap(), 0, pwszTempBuffer);
2650     HeapFree(GetProcessHeap(), 0, pwszExpandedBuffer);
2651     return result;
2652 }
2653
2654 /******************************************************************************
2655  * RegLoadMUIStringA [ADVAPI32.@]
2656  *
2657  * See RegLoadMUIStringW
2658  */
2659 LSTATUS WINAPI RegLoadMUIStringA(HKEY hKey, LPCSTR pszValue, LPSTR pszBuffer, DWORD cbBuffer,
2660     LPDWORD pcbData, DWORD dwFlags, LPCSTR pszBaseDir)
2661 {
2662     UNICODE_STRING valueW, baseDirW;
2663     WCHAR *pwszBuffer;
2664     DWORD cbData = cbBuffer * sizeof(WCHAR);
2665     LONG result;
2666
2667     valueW.Buffer = baseDirW.Buffer = pwszBuffer = NULL;
2668     if (!RtlCreateUnicodeStringFromAsciiz(&valueW, pszValue) ||
2669         !RtlCreateUnicodeStringFromAsciiz(&baseDirW, pszBaseDir) ||
2670         !(pwszBuffer = HeapAlloc(GetProcessHeap(), 0, cbData)))
2671     {
2672         result = ERROR_NOT_ENOUGH_MEMORY;
2673         goto cleanup;
2674     }
2675
2676     result = RegLoadMUIStringW(hKey, valueW.Buffer, pwszBuffer, cbData, NULL, dwFlags,
2677                                baseDirW.Buffer);
2678
2679     if (result == ERROR_SUCCESS) {
2680         cbData = WideCharToMultiByte(CP_ACP, 0, pwszBuffer, -1, pszBuffer, cbBuffer, NULL, NULL);
2681         if (pcbData)
2682             *pcbData = cbData;
2683     }
2684
2685 cleanup:
2686     HeapFree(GetProcessHeap(), 0, pwszBuffer);
2687     RtlFreeUnicodeString(&baseDirW);
2688     RtlFreeUnicodeString(&valueW);
2689
2690     return result;
2691 }
2692
2693 /******************************************************************************
2694  * RegDisablePredefinedCache [ADVAPI32.@]
2695  *
2696  * Disables the caching of the HKEY_CLASSES_ROOT key for the process.
2697  *
2698  * PARAMS
2699  *  None.
2700  *
2701  * RETURNS
2702  *  Success: ERROR_SUCCESS
2703  *  Failure: nonzero error code from Winerror.h
2704  *
2705  * NOTES
2706  *  This is useful for services that use impersonation.
2707  */
2708 LSTATUS WINAPI RegDisablePredefinedCache(void)
2709 {
2710     HKEY hkey_current_user;
2711     int idx = (UINT_PTR)HKEY_CURRENT_USER - (UINT_PTR)HKEY_SPECIAL_ROOT_FIRST;
2712
2713     /* prevent caching of future requests */
2714     hkcu_cache_disabled = TRUE;
2715
2716     hkey_current_user = InterlockedExchangePointer( (void **)&special_root_keys[idx], NULL );
2717
2718     if (hkey_current_user)
2719         NtClose( hkey_current_user );
2720
2721     return ERROR_SUCCESS;
2722 }
2723
2724 /******************************************************************************
2725  * RegDeleteTreeW [ADVAPI32.@]
2726  *
2727  */
2728 LSTATUS WINAPI RegDeleteTreeW(HKEY hKey, LPCWSTR lpszSubKey)
2729 {
2730     LONG ret;
2731     DWORD dwMaxSubkeyLen, dwMaxValueLen;
2732     DWORD dwMaxLen, dwSize;
2733     WCHAR szNameBuf[MAX_PATH], *lpszName = szNameBuf;
2734     HKEY hSubKey = hKey;
2735
2736     TRACE("(hkey=%p,%p %s)\n", hKey, lpszSubKey, debugstr_w(lpszSubKey));
2737
2738     if(lpszSubKey)
2739     {
2740         ret = RegOpenKeyExW(hKey, lpszSubKey, 0, KEY_READ, &hSubKey);
2741         if (ret) return ret;
2742     }
2743
2744     /* Get highest length for keys, values */
2745     ret = RegQueryInfoKeyW(hSubKey, NULL, NULL, NULL, NULL,
2746             &dwMaxSubkeyLen, NULL, NULL, &dwMaxValueLen, NULL, NULL, NULL);
2747     if (ret) goto cleanup;
2748
2749     dwMaxSubkeyLen++;
2750     dwMaxValueLen++;
2751     dwMaxLen = max(dwMaxSubkeyLen, dwMaxValueLen);
2752     if (dwMaxLen > sizeof(szNameBuf)/sizeof(WCHAR))
2753     {
2754         /* Name too big: alloc a buffer for it */
2755         if (!(lpszName = HeapAlloc( GetProcessHeap(), 0, dwMaxLen*sizeof(WCHAR))))
2756         {
2757             ret = ERROR_NOT_ENOUGH_MEMORY;
2758             goto cleanup;
2759         }
2760     }
2761
2762
2763     /* Recursively delete all the subkeys */
2764     while (TRUE)
2765     {
2766         dwSize = dwMaxLen;
2767         if (RegEnumKeyExW(hSubKey, 0, lpszName, &dwSize, NULL,
2768                           NULL, NULL, NULL)) break;
2769
2770         ret = RegDeleteTreeW(hSubKey, lpszName);
2771         if (ret) goto cleanup;
2772     }
2773
2774     if (lpszSubKey)
2775         ret = RegDeleteKeyW(hKey, lpszSubKey);
2776     else
2777         while (TRUE)
2778         {
2779             dwSize = dwMaxLen;
2780             if (RegEnumValueW(hKey, 0, lpszName, &dwSize,
2781                   NULL, NULL, NULL, NULL)) break;
2782
2783             ret = RegDeleteValueW(hKey, lpszName);
2784             if (ret) goto cleanup;
2785         }
2786
2787 cleanup:
2788     /* Free buffer if allocated */
2789     if (lpszName != szNameBuf)
2790         HeapFree( GetProcessHeap(), 0, lpszName);
2791     if(lpszSubKey)
2792         RegCloseKey(hSubKey);
2793     return ret;
2794 }
2795
2796 /******************************************************************************
2797  * RegDeleteTreeA [ADVAPI32.@]
2798  *
2799  */
2800 LSTATUS WINAPI RegDeleteTreeA(HKEY hKey, LPCSTR lpszSubKey)
2801 {
2802     LONG ret;
2803     UNICODE_STRING lpszSubKeyW;
2804
2805     if (lpszSubKey) RtlCreateUnicodeStringFromAsciiz( &lpszSubKeyW, lpszSubKey);
2806     else lpszSubKeyW.Buffer = NULL;
2807     ret = RegDeleteTreeW( hKey, lpszSubKeyW.Buffer);
2808     RtlFreeUnicodeString( &lpszSubKeyW );
2809     return ret;
2810 }