dlls/crypt32/regstore.c

   1 /*
   2  * Copyright 2004-2007 Juan Lang
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18 #include <assert.h>
  19 #include <stdarg.h>
  20 #include "windef.h"
  21 #include "winbase.h"
  22 #include "wincrypt.h"
  23 #include "winreg.h"
  24 #include "winuser.h"
  25 #include "wine/debug.h"
  26 #include "wine/list.h"
  27 #include "crypt32_private.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
  30
  31 typedef struct _WINE_HASH_TO_DELETE
  32 {
  33     BYTE        hash[20];
  34     struct list entry;
  35 } WINE_HASH_TO_DELETE, *PWINE_HASH_TO_DELETE;
  36
  37 typedef struct _WINE_REGSTOREINFO
  38 {
  39     DWORD            dwOpenFlags;
  40     HCERTSTORE       memStore;
  41     HKEY             key;
  42     BOOL             dirty;
  43     CRITICAL_SECTION cs;
  44     struct list      certsToDelete;
  45     struct list      crlsToDelete;
  46 } WINE_REGSTOREINFO, *PWINE_REGSTOREINFO;
  47
  48 static void CRYPT_HashToStr(const BYTE *hash, LPWSTR asciiHash)
  49 {
  50     static const WCHAR fmt[] = { '%','0','2','X',0 };
  51     DWORD i;
  52
  53     assert(hash);
  54     assert(asciiHash);
  55
  56     for (i = 0; i < 20; i++)
  57         wsprintfW(asciiHash + i * 2, fmt, hash[i]);
  58 }
  59
  60 static const WCHAR CertsW[] = { 'C','e','r','t','i','f','i','c','a','t','e','s',
  61  0 };
  62 static const WCHAR CRLsW[] = { 'C','R','L','s',0 };
  63 static const WCHAR CTLsW[] = { 'C','T','L','s',0 };
  64 static const WCHAR BlobW[] = { 'B','l','o','b',0 };
  65
  66 static void CRYPT_RegReadSerializedFromReg(const WINE_REGSTOREINFO *store, HKEY key,
  67  DWORD contextType)
  68 {
  69     LONG rc;
  70     DWORD index = 0;
  71     WCHAR subKeyName[MAX_PATH];
  72
  73     do {
  74         DWORD size = sizeof(subKeyName) / sizeof(WCHAR);
  75
  76         rc = RegEnumKeyExW(key, index++, subKeyName, &size, NULL, NULL, NULL,
  77          NULL);
  78         if (!rc)
  79         {
  80             HKEY subKey;
  81
  82             rc = RegOpenKeyExW(key, subKeyName, 0, KEY_READ, &subKey);
  83             if (!rc)
  84             {
  85                 LPBYTE buf = NULL;
  86
  87                 size = 0;
  88                 rc = RegQueryValueExW(subKey, BlobW, NULL, NULL, NULL, &size);
  89                 if (!rc)
  90                     buf = CryptMemAlloc(size);
  91                 if (buf)
  92                 {
  93                     rc = RegQueryValueExW(subKey, BlobW, NULL, NULL, buf,
  94                      &size);
  95                     if (!rc)
  96                     {
  97                         const void *context;
  98                         DWORD addedType;
  99
 100                         TRACE("Adding cert with hash %s\n",
 101                          debugstr_w(subKeyName));
 102                         context = CRYPT_ReadSerializedElement(buf, size,
 103                          contextType, &addedType);
 104                         if (context)
 105                         {
 106                             const WINE_CONTEXT_INTERFACE *contextInterface;
 107                             BYTE hash[20];
 108
 109                             switch (addedType)
 110                             {
 111                             case CERT_STORE_CERTIFICATE_CONTEXT:
 112                                 contextInterface = pCertInterface;
 113                                 break;
 114                             case CERT_STORE_CRL_CONTEXT:
 115                                 contextInterface = pCRLInterface;
 116                                 break;
 117                             case CERT_STORE_CTL_CONTEXT:
 118                                 contextInterface = pCTLInterface;
 119                                 break;
 120                             default:
 121                                 contextInterface = NULL;
 122                             }
 123                             if (contextInterface)
 124                             {
 125                                 size = sizeof(hash);
 126                                 if (contextInterface->getProp(context,
 127                                  CERT_HASH_PROP_ID, hash, &size))
 128                                 {
 129                                     WCHAR asciiHash[20 * 2 + 1];
 130
 131                                     CRYPT_HashToStr(hash, asciiHash);
 132                                     TRACE("comparing %s\n",
 133                                      debugstr_w(asciiHash));
 134                                     TRACE("with %s\n", debugstr_w(subKeyName));
 135                                     if (!lstrcmpW(asciiHash, subKeyName))
 136                                     {
 137                                         TRACE("hash matches, adding\n");
 138                                         contextInterface->addContextToStore(
 139                                          store->memStore, context,
 140                                          CERT_STORE_ADD_REPLACE_EXISTING, NULL);
 141                                     }
 142                                     else
 143                                         TRACE("hash doesn't match, ignoring\n");
 144                                 }
 145                                 contextInterface->free(context);
 146                             }
 147                         }
 148                     }
 149                     CryptMemFree(buf);
 150                 }
 151                 RegCloseKey(subKey);
 152             }
 153             /* Ignore intermediate errors, continue enumerating */
 154             rc = ERROR_SUCCESS;
 155         }
 156     } while (!rc);
 157 }
 158
 159 static void CRYPT_RegReadFromReg(const WINE_REGSTOREINFO *store)
 160 {
 161     static const WCHAR * const subKeys[] = { CertsW, CRLsW, CTLsW };
 162     static const DWORD contextFlags[] = { CERT_STORE_CERTIFICATE_CONTEXT_FLAG,
 163      CERT_STORE_CRL_CONTEXT_FLAG, CERT_STORE_CTL_CONTEXT_FLAG };
 164     DWORD i;
 165
 166     for (i = 0; i < sizeof(subKeys) / sizeof(subKeys[0]); i++)
 167     {
 168         HKEY key;
 169         LONG rc;
 170
 171         rc = RegCreateKeyExW(store->key, subKeys[i], 0, NULL, 0, KEY_READ, NULL,
 172          &key, NULL);
 173         if (!rc)
 174         {
 175             CRYPT_RegReadSerializedFromReg(store, key, contextFlags[i]);
 176             RegCloseKey(key);
 177         }
 178     }
 179 }
 180
 181 /* Hash is assumed to be 20 bytes in length (a SHA-1 hash) */
 182 static BOOL CRYPT_WriteSerializedToReg(HKEY key, const BYTE *hash, const BYTE *buf,
 183  DWORD len)
 184 {
 185     WCHAR asciiHash[20 * 2 + 1];
 186     LONG rc;
 187     HKEY subKey;
 188     BOOL ret;
 189
 190     CRYPT_HashToStr(hash, asciiHash);
 191     rc = RegCreateKeyExW(key, asciiHash, 0, NULL, 0, KEY_ALL_ACCESS, NULL,
 192      &subKey, NULL);
 193     if (!rc)
 194     {
 195         rc = RegSetValueExW(subKey, BlobW, 0, REG_BINARY, buf, len);
 196         RegCloseKey(subKey);
 197     }
 198     if (!rc)
 199         ret = TRUE;
 200     else
 201     {
 202         SetLastError(rc);
 203         ret = FALSE;
 204     }
 205     return ret;
 206 }
 207
 208 static BOOL CRYPT_SerializeContextsToReg(HKEY key,
 209  const WINE_CONTEXT_INTERFACE *contextInterface, HCERTSTORE memStore)
 210 {
 211     const void *context = NULL;
 212     BOOL ret;
 213
 214     do {
 215         context = contextInterface->enumContextsInStore(memStore, context);
 216         if (context)
 217         {
 218             BYTE hash[20];
 219             DWORD hashSize = sizeof(hash);
 220
 221             ret = contextInterface->getProp(context, CERT_HASH_PROP_ID, hash,
 222              &hashSize);
 223             if (ret)
 224             {
 225                 DWORD size = 0;
 226                 LPBYTE buf = NULL;
 227
 228                 ret = contextInterface->serialize(context, 0, NULL, &size);
 229                 if (size)
 230                     buf = CryptMemAlloc(size);
 231                 if (buf)
 232                 {
 233                     ret = contextInterface->serialize(context, 0, buf, &size);
 234                     if (ret)
 235                         ret = CRYPT_WriteSerializedToReg(key, hash, buf, size);
 236                 }
 237                 CryptMemFree(buf);
 238             }
 239         }
 240         else
 241             ret = TRUE;
 242     } while (ret && context != NULL);
 243     if (context)
 244         contextInterface->free(context);
 245     return ret;
 246 }
 247
 248 static BOOL CRYPT_RegWriteToReg(PWINE_REGSTOREINFO store)
 249 {
 250     static const WCHAR * const subKeys[] = { CertsW, CRLsW, CTLsW };
 251     const WINE_CONTEXT_INTERFACE * const interfaces[] = { pCertInterface,
 252      pCRLInterface, pCTLInterface };
 253     struct list *listToDelete[] = { &store->certsToDelete, &store->crlsToDelete,
 254      NULL };
 255     BOOL ret = TRUE;
 256     DWORD i;
 257
 258     for (i = 0; ret && i < sizeof(subKeys) / sizeof(subKeys[0]); i++)
 259     {
 260         HKEY key;
 261         LONG rc = RegCreateKeyExW(store->key, subKeys[i], 0, NULL, 0,
 262          KEY_ALL_ACCESS, NULL, &key, NULL);
 263
 264         if (!rc)
 265         {
 266             if (listToDelete[i])
 267             {
 268                 PWINE_HASH_TO_DELETE toDelete, next;
 269                 WCHAR asciiHash[20 * 2 + 1];
 270
 271                 EnterCriticalSection(&store->cs);
 272                 LIST_FOR_EACH_ENTRY_SAFE(toDelete, next, listToDelete[i],
 273                  WINE_HASH_TO_DELETE, entry)
 274                 {
 275                     LONG rc;
 276
 277                     CRYPT_HashToStr(toDelete->hash, asciiHash);
 278                     TRACE("Removing %s\n", debugstr_w(asciiHash));
 279                     rc = RegDeleteKeyW(key, asciiHash);
 280                     if (rc != ERROR_SUCCESS && rc != ERROR_FILE_NOT_FOUND)
 281                     {
 282                         SetLastError(rc);
 283                         ret = FALSE;
 284                     }
 285                     list_remove(&toDelete->entry);
 286                     CryptMemFree(toDelete);
 287                 }
 288                 LeaveCriticalSection(&store->cs);
 289             }
 290             ret = CRYPT_SerializeContextsToReg(key, interfaces[i],
 291              store->memStore);
 292             RegCloseKey(key);
 293         }
 294         else
 295         {
 296             SetLastError(rc);
 297             ret = FALSE;
 298         }
 299     }
 300     return ret;
 301 }
 302
 303 /* If force is true or the registry store is dirty, writes the contents of the
 304  * store to the registry.
 305  */
 306 static BOOL CRYPT_RegFlushStore(PWINE_REGSTOREINFO store, BOOL force)
 307 {
 308     BOOL ret;
 309
 310     TRACE("(%p, %d)\n", store, force);
 311
 312     if (store->dirty || force)
 313         ret = CRYPT_RegWriteToReg(store);
 314     else
 315         ret = TRUE;
 316     return ret;
 317 }
 318
 319 static void WINAPI CRYPT_RegCloseStore(HCERTSTORE hCertStore, DWORD dwFlags)
 320 {
 321     PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
 322
 323     TRACE("(%p, %08x)\n", store, dwFlags);
 324     if (dwFlags)
 325         FIXME("Unimplemented flags: %08x\n", dwFlags);
 326
 327     CRYPT_RegFlushStore(store, FALSE);
 328     RegCloseKey(store->key);
 329     store->cs.DebugInfo->Spare[0] = 0;
 330     DeleteCriticalSection(&store->cs);
 331     CryptMemFree(store);
 332 }
 333
 334 static BOOL WINAPI CRYPT_RegWriteContext(PWINE_REGSTOREINFO store,
 335  const void *context, DWORD dwFlags)
 336 {
 337     BOOL ret;
 338
 339     if (dwFlags & CERT_STORE_PROV_WRITE_ADD_FLAG)
 340     {
 341         store->dirty = TRUE;
 342         ret = TRUE;
 343     }
 344     else
 345         ret = FALSE;
 346     return ret;
 347 }
 348
 349 static BOOL CRYPT_RegDeleteContext(PWINE_REGSTOREINFO store,
 350  struct list *deleteList, const void *context,
 351  PCWINE_CONTEXT_INTERFACE contextInterface)
 352 {
 353     BOOL ret;
 354
 355     if (store->dwOpenFlags & CERT_STORE_READONLY_FLAG)
 356     {
 357         SetLastError(ERROR_ACCESS_DENIED);
 358         ret = FALSE;
 359     }
 360     else
 361     {
 362         PWINE_HASH_TO_DELETE toDelete =
 363          CryptMemAlloc(sizeof(WINE_HASH_TO_DELETE));
 364
 365         if (toDelete)
 366         {
 367             DWORD size = sizeof(toDelete->hash);
 368
 369             ret = contextInterface->getProp(context, CERT_HASH_PROP_ID,
 370              toDelete->hash, &size);
 371             if (ret)
 372             {
 373                 EnterCriticalSection(&store->cs);
 374                 list_add_tail(deleteList, &toDelete->entry);
 375                 LeaveCriticalSection(&store->cs);
 376             }
 377             else
 378             {
 379                 CryptMemFree(toDelete);
 380                 ret = FALSE;
 381             }
 382         }
 383         else
 384             ret = FALSE;
 385         if (ret)
 386             store->dirty = TRUE;
 387     }
 388     return ret;
 389 }
 390
 391 static BOOL WINAPI CRYPT_RegWriteCert(HCERTSTORE hCertStore,
 392  PCCERT_CONTEXT cert, DWORD dwFlags)
 393 {
 394     PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
 395
 396     TRACE("(%p, %p, %d)\n", hCertStore, cert, dwFlags);
 397
 398     return CRYPT_RegWriteContext(store, cert, dwFlags);
 399 }
 400
 401 static BOOL WINAPI CRYPT_RegDeleteCert(HCERTSTORE hCertStore,
 402  PCCERT_CONTEXT pCertContext, DWORD dwFlags)
 403 {
 404     PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
 405
 406     TRACE("(%p, %p, %08x)\n", store, pCertContext, dwFlags);
 407
 408     return CRYPT_RegDeleteContext(store, &store->certsToDelete, pCertContext,
 409      pCertInterface);
 410 }
 411
 412 static BOOL WINAPI CRYPT_RegWriteCRL(HCERTSTORE hCertStore,
 413  PCCRL_CONTEXT crl, DWORD dwFlags)
 414 {
 415     PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
 416
 417     TRACE("(%p, %p, %d)\n", hCertStore, crl, dwFlags);
 418
 419     return CRYPT_RegWriteContext(store, crl, dwFlags);
 420 }
 421
 422 static BOOL WINAPI CRYPT_RegDeleteCRL(HCERTSTORE hCertStore,
 423  PCCRL_CONTEXT pCrlContext, DWORD dwFlags)
 424 {
 425     PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
 426
 427     TRACE("(%p, %p, %08x)\n", store, pCrlContext, dwFlags);
 428
 429     return CRYPT_RegDeleteContext(store, &store->crlsToDelete, pCrlContext,
 430      pCRLInterface);
 431 }
 432
 433 static BOOL WINAPI CRYPT_RegControl(HCERTSTORE hCertStore, DWORD dwFlags,
 434  DWORD dwCtrlType, void const *pvCtrlPara)
 435 {
 436     PWINE_REGSTOREINFO store = (PWINE_REGSTOREINFO)hCertStore;
 437     BOOL ret;
 438
 439     TRACE("(%p, %08x, %d, %p)\n", hCertStore, dwFlags, dwCtrlType,
 440      pvCtrlPara);
 441
 442     switch (dwCtrlType)
 443     {
 444     case CERT_STORE_CTRL_RESYNC:
 445         CRYPT_RegFlushStore(store, FALSE);
 446         CRYPT_EmptyStore(store->memStore);
 447         CRYPT_RegReadFromReg(store);
 448         ret = TRUE;
 449         break;
 450     case CERT_STORE_CTRL_COMMIT:
 451         ret = CRYPT_RegFlushStore(store,
 452          dwFlags & CERT_STORE_CTRL_COMMIT_FORCE_FLAG);
 453         break;
 454     default:
 455         FIXME("%d: stub\n", dwCtrlType);
 456         ret = FALSE;
 457     }
 458     return ret;
 459 }
 460
 461 static void *regProvFuncs[] = {
 462     CRYPT_RegCloseStore,
 463     NULL, /* CERT_STORE_PROV_READ_CERT_FUNC */
 464     CRYPT_RegWriteCert,
 465     CRYPT_RegDeleteCert,
 466     NULL, /* CERT_STORE_PROV_SET_CERT_PROPERTY_FUNC */
 467     NULL, /* CERT_STORE_PROV_READ_CRL_FUNC */
 468     CRYPT_RegWriteCRL,
 469     CRYPT_RegDeleteCRL,
 470     NULL, /* CERT_STORE_PROV_SET_CRL_PROPERTY_FUNC */
 471     NULL, /* CERT_STORE_PROV_READ_CTL_FUNC */
 472     NULL, /* CERT_STORE_PROV_WRITE_CTL_FUNC */
 473     NULL, /* CERT_STORE_PROV_DELETE_CTL_FUNC */
 474     NULL, /* CERT_STORE_PROV_SET_CTL_PROPERTY_FUNC */
 475     CRYPT_RegControl,
 476 };
 477
 478 PWINECRYPT_CERTSTORE CRYPT_RegOpenStore(HCRYPTPROV hCryptProv, DWORD dwFlags,
 479  const void *pvPara)
 480 {
 481     PWINECRYPT_CERTSTORE store = NULL;
 482
 483     TRACE("(%ld, %08x, %p)\n", hCryptProv, dwFlags, pvPara);
 484
 485     if (dwFlags & CERT_STORE_DELETE_FLAG)
 486     {
 487         DWORD rc = RegDeleteTreeW((HKEY)pvPara, CertsW);
 488
 489         if (rc == ERROR_SUCCESS || rc == ERROR_NO_MORE_ITEMS)
 490             rc = RegDeleteTreeW((HKEY)pvPara, CRLsW);
 491         if (rc == ERROR_SUCCESS || rc == ERROR_NO_MORE_ITEMS)
 492             rc = RegDeleteTreeW((HKEY)pvPara, CTLsW);
 493         if (rc == ERROR_NO_MORE_ITEMS)
 494             rc = ERROR_SUCCESS;
 495         SetLastError(rc);
 496     }
 497     else
 498     {
 499         HKEY key;
 500
 501         if (DuplicateHandle(GetCurrentProcess(), (HANDLE)pvPara,
 502          GetCurrentProcess(), (LPHANDLE)&key,
 503          dwFlags & CERT_STORE_READONLY_FLAG ? KEY_READ : KEY_ALL_ACCESS,
 504          TRUE, 0))
 505         {
 506             PWINECRYPT_CERTSTORE memStore;
 507
 508             memStore = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, hCryptProv,
 509              CERT_STORE_CREATE_NEW_FLAG, NULL);
 510             if (memStore)
 511             {
 512                 PWINE_REGSTOREINFO regInfo = CryptMemAlloc(
 513                  sizeof(WINE_REGSTOREINFO));
 514
 515                 if (regInfo)
 516                 {
 517                     CERT_STORE_PROV_INFO provInfo = { 0 };
 518
 519                     regInfo->dwOpenFlags = dwFlags;
 520                     regInfo->memStore = memStore;
 521                     regInfo->key = key;
 522                     InitializeCriticalSection(&regInfo->cs);
 523                     regInfo->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PWINE_REGSTOREINFO->cs");
 524                     list_init(&regInfo->certsToDelete);
 525                     list_init(&regInfo->crlsToDelete);
 526                     CRYPT_RegReadFromReg(regInfo);
 527                     regInfo->dirty = FALSE;
 528                     provInfo.cbSize = sizeof(provInfo);
 529                     provInfo.cStoreProvFunc = sizeof(regProvFuncs) /
 530                      sizeof(regProvFuncs[0]);
 531                     provInfo.rgpvStoreProvFunc = regProvFuncs;
 532                     provInfo.hStoreProv = regInfo;
 533                     store = CRYPT_ProvCreateStore(dwFlags, memStore, &provInfo);
 534                     /* Reg store doesn't need crypto provider, so close it */
 535                     if (hCryptProv &&
 536                      !(dwFlags & CERT_STORE_NO_CRYPT_RELEASE_FLAG))
 537                         CryptReleaseContext(hCryptProv, 0);
 538                 }
 539             }
 540         }
 541     }
 542     TRACE("returning %p\n", store);
 543     return store;
 544 }