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