dlls/bcrypt/bcrypt_main.c

   1 /*
   2  * Copyright 2009 Henri Verbeet for CodeWeavers
   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  */
  19
  20 #include "config.h"
  21 #include "wine/port.h"
  22
  23 #include <stdarg.h>
  24 #ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
  25 #include <CommonCrypto/CommonDigest.h>
  26 #elif defined(SONAME_LIBGNUTLS)
  27 #include <gnutls/gnutls.h>
  28 #include <gnutls/crypto.h>
  29 #endif
  30
  31 #include "ntstatus.h"
  32 #define WIN32_NO_STATUS
  33 #include "windef.h"
  34 #include "winbase.h"
  35 #include "ntsecapi.h"
  36 #include "bcrypt.h"
  37
  38 #include "wine/debug.h"
  39 #include "wine/library.h"
  40 #include "wine/unicode.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(bcrypt);
  43
  44 static HINSTANCE instance;
  45
  46 #if defined(SONAME_LIBGNUTLS) && !defined(HAVE_COMMONCRYPTO_COMMONDIGEST_H)
  47 WINE_DECLARE_DEBUG_CHANNEL(winediag);
  48
  49 static void *libgnutls_handle;
  50 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  51 MAKE_FUNCPTR(gnutls_global_deinit);
  52 MAKE_FUNCPTR(gnutls_global_init);
  53 MAKE_FUNCPTR(gnutls_global_set_log_function);
  54 MAKE_FUNCPTR(gnutls_global_set_log_level);
  55 MAKE_FUNCPTR(gnutls_hash);
  56 MAKE_FUNCPTR(gnutls_hash_deinit);
  57 MAKE_FUNCPTR(gnutls_hash_init);
  58 MAKE_FUNCPTR(gnutls_perror);
  59 #undef MAKE_FUNCPTR
  60
  61 static void gnutls_log( int level, const char *msg )
  62 {
  63     TRACE( "<%d> %s", level, msg );
  64 }
  65
  66 static BOOL gnutls_initialize(void)
  67 {
  68     int ret;
  69
  70     if (!(libgnutls_handle = wine_dlopen( SONAME_LIBGNUTLS, RTLD_NOW, NULL, 0 )))
  71     {
  72         ERR_(winediag)( "failed to load libgnutls, no support for crypto hashes\n" );
  73         return FALSE;
  74     }
  75
  76 #define LOAD_FUNCPTR(f) \
  77     if (!(p##f = wine_dlsym( libgnutls_handle, #f, NULL, 0 ))) \
  78     { \
  79         ERR( "failed to load %s\n", #f ); \
  80         goto fail; \
  81     }
  82
  83     LOAD_FUNCPTR(gnutls_global_deinit)
  84     LOAD_FUNCPTR(gnutls_global_init)
  85     LOAD_FUNCPTR(gnutls_global_set_log_function)
  86     LOAD_FUNCPTR(gnutls_global_set_log_level)
  87     LOAD_FUNCPTR(gnutls_hash);
  88     LOAD_FUNCPTR(gnutls_hash_deinit);
  89     LOAD_FUNCPTR(gnutls_hash_init);
  90     LOAD_FUNCPTR(gnutls_perror)
  91 #undef LOAD_FUNCPTR
  92
  93     if ((ret = pgnutls_global_init()) != GNUTLS_E_SUCCESS)
  94     {
  95         pgnutls_perror( ret );
  96         goto fail;
  97     }
  98
  99     if (TRACE_ON( bcrypt ))
 100     {
 101         pgnutls_global_set_log_level( 4 );
 102         pgnutls_global_set_log_function( gnutls_log );
 103     }
 104
 105     return TRUE;
 106
 107 fail:
 108     wine_dlclose( libgnutls_handle, NULL, 0 );
 109     libgnutls_handle = NULL;
 110     return FALSE;
 111 }
 112
 113 static void gnutls_uninitialize(void)
 114 {
 115     pgnutls_global_deinit();
 116     wine_dlclose( libgnutls_handle, NULL, 0 );
 117     libgnutls_handle = NULL;
 118 }
 119 #endif /* SONAME_LIBGNUTLS && !HAVE_COMMONCRYPTO_COMMONDIGEST_H */
 120
 121 NTSTATUS WINAPI BCryptEnumAlgorithms(ULONG dwAlgOperations, ULONG *pAlgCount,
 122                                      BCRYPT_ALGORITHM_IDENTIFIER **ppAlgList, ULONG dwFlags)
 123 {
 124     FIXME("%08x, %p, %p, %08x - stub\n", dwAlgOperations, pAlgCount, ppAlgList, dwFlags);
 125
 126     *ppAlgList=NULL;
 127     *pAlgCount=0;
 128
 129     return STATUS_NOT_IMPLEMENTED;
 130 }
 131
 132 NTSTATUS WINAPI BCryptGenRandom(BCRYPT_ALG_HANDLE algorithm, UCHAR *buffer, ULONG count, ULONG flags)
 133 {
 134     const DWORD supported_flags = BCRYPT_USE_SYSTEM_PREFERRED_RNG;
 135     TRACE("%p, %p, %u, %08x - semi-stub\n", algorithm, buffer, count, flags);
 136
 137     if (!algorithm)
 138     {
 139         /* It's valid to call without an algorithm if BCRYPT_USE_SYSTEM_PREFERRED_RNG
 140          * is set. In this case the preferred system RNG is used.
 141          */
 142         if (!(flags & BCRYPT_USE_SYSTEM_PREFERRED_RNG))
 143             return STATUS_INVALID_HANDLE;
 144     }
 145     if (!buffer)
 146         return STATUS_INVALID_PARAMETER;
 147
 148     if (flags & ~supported_flags)
 149         FIXME("unsupported flags %08x\n", flags & ~supported_flags);
 150
 151     if (algorithm)
 152         FIXME("ignoring selected algorithm\n");
 153
 154     /* When zero bytes are requested the function returns success too. */
 155     if (!count)
 156         return STATUS_SUCCESS;
 157
 158     if (flags & BCRYPT_USE_SYSTEM_PREFERRED_RNG)
 159     {
 160         if (RtlGenRandom(buffer, count))
 161             return STATUS_SUCCESS;
 162     }
 163
 164     FIXME("called with unsupported parameters, returning error\n");
 165     return STATUS_NOT_IMPLEMENTED;
 166 }
 167
 168 #define MAGIC_ALG  (('A' << 24) | ('L' << 16) | ('G' << 8) | '0')
 169 #define MAGIC_HASH (('H' << 24) | ('A' << 16) | ('S' << 8) | 'H')
 170 struct object
 171 {
 172     ULONG magic;
 173 };
 174
 175 enum alg_id
 176 {
 177     ALG_ID_SHA1   = 1,
 178     ALG_ID_SHA256 = 2,
 179     ALG_ID_SHA384 = 3,
 180     ALG_ID_SHA512 = 4
 181 };
 182
 183 struct algorithm
 184 {
 185     struct object hdr;
 186     enum alg_id   id;
 187 };
 188
 189 NTSTATUS WINAPI BCryptOpenAlgorithmProvider( BCRYPT_ALG_HANDLE *handle, LPCWSTR id, LPCWSTR implementation, DWORD flags )
 190 {
 191     struct algorithm *alg;
 192     enum alg_id alg_id;
 193
 194     TRACE( "%p, %s, %s, %08x\n", handle, wine_dbgstr_w(id), wine_dbgstr_w(implementation), flags );
 195
 196     if (!handle || !id) return STATUS_INVALID_PARAMETER;
 197     if (flags)
 198     {
 199         FIXME( "unimplemented flags %08x\n", flags );
 200         return STATUS_NOT_IMPLEMENTED;
 201     }
 202
 203     if (!strcmpW( id, BCRYPT_SHA1_ALGORITHM )) alg_id = ALG_ID_SHA1;
 204     else if (!strcmpW( id, BCRYPT_SHA256_ALGORITHM )) alg_id = ALG_ID_SHA256;
 205     else if (!strcmpW( id, BCRYPT_SHA384_ALGORITHM )) alg_id = ALG_ID_SHA384;
 206     else if (!strcmpW( id, BCRYPT_SHA512_ALGORITHM )) alg_id = ALG_ID_SHA512;
 207     else
 208     {
 209         FIXME( "algorithm %s not supported\n", debugstr_w(id) );
 210         return STATUS_NOT_IMPLEMENTED;
 211     }
 212     if (!implementation || strcmpW( implementation, MS_PRIMITIVE_PROVIDER ))
 213     {
 214         FIXME( "implementation %s not supported\n", debugstr_w(implementation) );
 215         return STATUS_NOT_IMPLEMENTED;
 216     }
 217
 218     if (!(alg = HeapAlloc( GetProcessHeap(), 0, sizeof(*alg) ))) return STATUS_NO_MEMORY;
 219     alg->hdr.magic = MAGIC_ALG;
 220     alg->id        = alg_id;
 221
 222     *handle = alg;
 223     return STATUS_SUCCESS;
 224 }
 225
 226 NTSTATUS WINAPI BCryptCloseAlgorithmProvider( BCRYPT_ALG_HANDLE handle, DWORD flags )
 227 {
 228     struct algorithm *alg = handle;
 229
 230     TRACE( "%p, %08x\n", handle, flags );
 231
 232     if (!alg || alg->hdr.magic != MAGIC_ALG) return STATUS_INVALID_HANDLE;
 233     HeapFree( GetProcessHeap(), 0, alg );
 234     return STATUS_SUCCESS;
 235 }
 236
 237 NTSTATUS WINAPI BCryptGetFipsAlgorithmMode(BOOLEAN *enabled)
 238 {
 239     FIXME("%p - semi-stub\n", enabled);
 240
 241     if (!enabled)
 242         return STATUS_INVALID_PARAMETER;
 243
 244     *enabled = FALSE;
 245     return STATUS_SUCCESS;
 246 }
 247
 248 #ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
 249 struct hash
 250 {
 251     struct object hdr;
 252     enum alg_id   alg_id;
 253     union
 254     {
 255         CC_SHA1_CTX   sha1_ctx;
 256         CC_SHA256_CTX sha256_ctx;
 257         CC_SHA512_CTX sha512_ctx;
 258     } u;
 259 };
 260
 261 static NTSTATUS hash_init( struct hash *hash )
 262 {
 263     switch (hash->alg_id)
 264     {
 265     case ALG_ID_SHA1:
 266         CC_SHA1_Init( &hash->u.sha1_ctx );
 267         break;
 268
 269     case ALG_ID_SHA256:
 270         CC_SHA256_Init( &hash->u.sha256_ctx );
 271         break;
 272
 273     case ALG_ID_SHA384:
 274         CC_SHA384_Init( &hash->u.sha512_ctx );
 275         break;
 276
 277     case ALG_ID_SHA512:
 278         CC_SHA512_Init( &hash->u.sha512_ctx );
 279         break;
 280
 281     default:
 282         ERR( "unhandled id %u\n", hash->alg_id );
 283         return STATUS_NOT_IMPLEMENTED;
 284     }
 285     return STATUS_SUCCESS;
 286 }
 287
 288 static NTSTATUS hash_update( struct hash *hash, UCHAR *input, ULONG size )
 289 {
 290     switch (hash->alg_id)
 291     {
 292     case ALG_ID_SHA1:
 293         CC_SHA1_Update( &hash->u.sha1_ctx, input, size );
 294         break;
 295
 296     case ALG_ID_SHA256:
 297         CC_SHA256_Update( &hash->u.sha256_ctx, input, size );
 298         break;
 299
 300     case ALG_ID_SHA384:
 301         CC_SHA384_Update( &hash->u.sha512_ctx, input, size );
 302         break;
 303
 304     case ALG_ID_SHA512:
 305         CC_SHA512_Update( &hash->u.sha512_ctx, input, size );
 306         break;
 307
 308     default:
 309         ERR( "unhandled id %u\n", hash->alg_id );
 310         return STATUS_NOT_IMPLEMENTED;
 311     }
 312     return STATUS_SUCCESS;
 313 }
 314
 315 static NTSTATUS hash_finish( struct hash *hash, UCHAR *output, ULONG size )
 316 {
 317     switch (hash->alg_id)
 318     {
 319     case ALG_ID_SHA1:
 320         CC_SHA1_Final( output, &hash->u.sha1_ctx );
 321         break;
 322
 323     case ALG_ID_SHA256:
 324         CC_SHA256_Final( output, &hash->u.sha256_ctx );
 325         break;
 326
 327     case ALG_ID_SHA384:
 328         CC_SHA384_Final( output, &hash->u.sha512_ctx );
 329         break;
 330
 331     case ALG_ID_SHA512:
 332         CC_SHA512_Final( output, &hash->u.sha512_ctx );
 333         break;
 334
 335     default:
 336         ERR( "unhandled id %u\n", hash->alg_id );
 337         break;
 338     }
 339     return STATUS_SUCCESS;
 340 }
 341 #elif defined(SONAME_LIBGNUTLS)
 342 struct hash
 343 {
 344     struct object    hdr;
 345     enum alg_id      alg_id;
 346     gnutls_hash_hd_t handle;
 347 };
 348
 349 static NTSTATUS hash_init( struct hash *hash )
 350 {
 351     gnutls_digest_algorithm_t alg;
 352
 353     if (!libgnutls_handle) return STATUS_INTERNAL_ERROR;
 354
 355     switch (hash->alg_id)
 356     {
 357     case ALG_ID_SHA1:
 358         alg = GNUTLS_DIG_SHA1;
 359         break;
 360
 361     case ALG_ID_SHA256:
 362         alg = GNUTLS_DIG_SHA256;
 363         break;
 364
 365     case ALG_ID_SHA384:
 366         alg = GNUTLS_DIG_SHA384;
 367         break;
 368
 369     case ALG_ID_SHA512:
 370         alg = GNUTLS_DIG_SHA512;
 371         break;
 372
 373     default:
 374         ERR( "unhandled id %u\n", hash->alg_id );
 375         return STATUS_NOT_IMPLEMENTED;
 376     }
 377
 378     if (pgnutls_hash_init( &hash->handle, alg )) return STATUS_INTERNAL_ERROR;
 379     return STATUS_SUCCESS;
 380 }
 381
 382 static NTSTATUS hash_update( struct hash *hash, UCHAR *input, ULONG size )
 383 {
 384     if (pgnutls_hash( hash->handle, input, size )) return STATUS_INTERNAL_ERROR;
 385     return STATUS_SUCCESS;
 386 }
 387
 388 static NTSTATUS hash_finish( struct hash *hash, UCHAR *output, ULONG size )
 389 {
 390     pgnutls_hash_deinit( hash->handle, output );
 391     return STATUS_SUCCESS;
 392 }
 393 #else
 394 struct hash
 395 {
 396     struct object hdr;
 397     enum alg_id   alg_id;
 398 };
 399
 400 static NTSTATUS hash_init( struct hash *hash )
 401 {
 402     ERR( "support for hashes not available at build time\n" );
 403     return STATUS_NOT_IMPLEMENTED;
 404 }
 405
 406 static NTSTATUS hash_update( struct hash *hash, UCHAR *input, ULONG size )
 407 {
 408     ERR( "support for hashes not available at build time\n" );
 409     return STATUS_NOT_IMPLEMENTED;
 410 }
 411
 412 static NTSTATUS hash_finish( struct hash *hash, UCHAR *output, ULONG size )
 413 {
 414     ERR( "support for hashes not available at build time\n" );
 415     return STATUS_NOT_IMPLEMENTED;
 416 }
 417 #endif
 418
 419 #define OBJECT_LENGTH_SHA1      278
 420 #define OBJECT_LENGTH_SHA256    286
 421 #define OBJECT_LENGTH_SHA384    382
 422 #define OBJECT_LENGTH_SHA512    382
 423
 424 #define HASH_DIGEST_LENGTH_SHA1     20
 425 #define HASH_DIGEST_LENGTH_SHA256   32
 426 #define HASH_DIGEST_LENGTH_SHA384   48
 427 #define HASH_DIGEST_LENGTH_SHA512   64
 428
 429 static NTSTATUS get_alg_property( enum alg_id id, const WCHAR *prop, UCHAR *buf, ULONG size, ULONG *ret_size )
 430 {
 431     ULONG value;
 432
 433     switch (id)
 434     {
 435     case ALG_ID_SHA1:
 436         if (!strcmpW( prop, BCRYPT_OBJECT_LENGTH ))
 437         {
 438             value = OBJECT_LENGTH_SHA1;
 439             break;
 440         }
 441         FIXME( "unsupported sha1 algorithm property %s\n", debugstr_w(prop) );
 442         return STATUS_NOT_IMPLEMENTED;
 443
 444     case ALG_ID_SHA256:
 445         if (!strcmpW( prop, BCRYPT_OBJECT_LENGTH ))
 446         {
 447             value = OBJECT_LENGTH_SHA256;
 448             break;
 449         }
 450         FIXME( "unsupported sha256 algorithm property %s\n", debugstr_w(prop) );
 451         return STATUS_NOT_IMPLEMENTED;
 452
 453     case ALG_ID_SHA384:
 454         if (!strcmpW( prop, BCRYPT_OBJECT_LENGTH ))
 455         {
 456             value = OBJECT_LENGTH_SHA384;
 457             break;
 458         }
 459         FIXME( "unsupported sha384 algorithm property %s\n", debugstr_w(prop) );
 460         return STATUS_NOT_IMPLEMENTED;
 461
 462     case ALG_ID_SHA512:
 463         if (!strcmpW( prop, BCRYPT_OBJECT_LENGTH ))
 464         {
 465             value = OBJECT_LENGTH_SHA512;
 466             break;
 467         }
 468         FIXME( "unsupported sha512 algorithm property %s\n", debugstr_w(prop) );
 469         return STATUS_NOT_IMPLEMENTED;
 470
 471     default:
 472         FIXME( "unsupported algorithm %u\n", id );
 473         return STATUS_NOT_IMPLEMENTED;
 474     }
 475
 476     if (size < sizeof(ULONG))
 477     {
 478         *ret_size = sizeof(ULONG);
 479         return STATUS_BUFFER_TOO_SMALL;
 480     }
 481     if (buf) *(ULONG *)buf = value;
 482     *ret_size = sizeof(ULONG);
 483
 484     return STATUS_SUCCESS;
 485 }
 486
 487 static NTSTATUS get_hash_property( enum alg_id id, const WCHAR *prop, UCHAR *buf, ULONG size, ULONG *ret_size )
 488 {
 489     ULONG value;
 490
 491     switch (id)
 492     {
 493     case ALG_ID_SHA1:
 494         if (!strcmpW( prop, BCRYPT_HASH_LENGTH ))
 495         {
 496             value = HASH_DIGEST_LENGTH_SHA1;
 497             break;
 498         }
 499         FIXME( "unsupported sha1 hash property %s\n", debugstr_w(prop) );
 500         return STATUS_NOT_IMPLEMENTED;
 501
 502     case ALG_ID_SHA256:
 503         if (!strcmpW( prop, BCRYPT_HASH_LENGTH ))
 504         {
 505             value = HASH_DIGEST_LENGTH_SHA256;
 506             break;
 507         }
 508         FIXME( "unsupported sha256 hash property %s\n", debugstr_w(prop) );
 509         return STATUS_NOT_IMPLEMENTED;
 510
 511     case ALG_ID_SHA384:
 512         if (!strcmpW( prop, BCRYPT_HASH_LENGTH ))
 513         {
 514             value = HASH_DIGEST_LENGTH_SHA384;
 515             break;
 516         }
 517         FIXME( "unsupported sha384 hash property %s\n", debugstr_w(prop) );
 518         return STATUS_NOT_IMPLEMENTED;
 519
 520     case ALG_ID_SHA512:
 521         if (!strcmpW( prop, BCRYPT_HASH_LENGTH ))
 522         {
 523             value = HASH_DIGEST_LENGTH_SHA512;
 524             break;
 525         }
 526         FIXME( "unsupported sha512 hash property %s\n", debugstr_w(prop) );
 527         return STATUS_NOT_IMPLEMENTED;
 528
 529     default:
 530         FIXME( "unsupported hash %u\n", id );
 531         return STATUS_NOT_IMPLEMENTED;
 532     }
 533
 534     if (size < sizeof(ULONG))
 535     {
 536         *ret_size = sizeof(ULONG);
 537         return STATUS_BUFFER_TOO_SMALL;
 538     }
 539     if (buf) *(ULONG *)buf = value;
 540     *ret_size = sizeof(ULONG);
 541
 542     return STATUS_SUCCESS;
 543 }
 544
 545 NTSTATUS WINAPI BCryptGetProperty( BCRYPT_HANDLE handle, LPCWSTR prop, UCHAR *buffer, ULONG count, ULONG *res, ULONG flags )
 546 {
 547     struct object *object = handle;
 548
 549     TRACE( "%p, %s, %p, %u, %p, %08x\n", handle, wine_dbgstr_w(prop), buffer, count, res, flags );
 550
 551     if (!object) return STATUS_INVALID_HANDLE;
 552     if (!prop || !res) return STATUS_INVALID_PARAMETER;
 553
 554     switch (object->magic)
 555     {
 556     case MAGIC_ALG:
 557     {
 558         const struct algorithm *alg = (const struct algorithm *)object;
 559         return get_alg_property( alg->id, prop, buffer, count, res );
 560     }
 561     case MAGIC_HASH:
 562     {
 563         const struct hash *hash = (const struct hash *)object;
 564         return get_hash_property( hash->alg_id, prop, buffer, count, res );
 565     }
 566     default:
 567         WARN( "unknown magic %08x", object->magic );
 568         return STATUS_INVALID_HANDLE;
 569     }
 570 }
 571
 572 NTSTATUS WINAPI BCryptCreateHash( BCRYPT_ALG_HANDLE algorithm, BCRYPT_HASH_HANDLE *handle, UCHAR *object, ULONG objectlen,
 573                                   UCHAR *secret, ULONG secretlen, ULONG flags )
 574 {
 575     struct algorithm *alg = algorithm;
 576     struct hash *hash;
 577     NTSTATUS status;
 578
 579     TRACE( "%p, %p, %p, %u, %p, %u, %08x - stub\n", algorithm, handle, object, objectlen,
 580            secret, secretlen, flags );
 581     if (flags)
 582     {
 583         FIXME( "unimplemented flags %08x\n", flags );
 584         return STATUS_NOT_IMPLEMENTED;
 585     }
 586
 587     if (!alg || alg->hdr.magic != MAGIC_ALG) return STATUS_INVALID_HANDLE;
 588     if (object) FIXME( "ignoring object buffer\n" );
 589
 590     if (!(hash = HeapAlloc( GetProcessHeap(), 0, sizeof(*hash) ))) return STATUS_NO_MEMORY;
 591     hash->hdr.magic = MAGIC_HASH;
 592     hash->alg_id    = alg->id;
 593     if ((status = hash_init( hash )) != STATUS_SUCCESS)
 594     {
 595         HeapFree( GetProcessHeap(), 0, hash );
 596         return status;
 597     }
 598
 599     *handle = hash;
 600     return STATUS_SUCCESS;
 601 }
 602
 603 NTSTATUS WINAPI BCryptDestroyHash( BCRYPT_HASH_HANDLE handle )
 604 {
 605     struct hash *hash = handle;
 606
 607     TRACE( "%p\n", handle );
 608
 609     if (!hash || hash->hdr.magic != MAGIC_HASH) return STATUS_INVALID_HANDLE;
 610     HeapFree( GetProcessHeap(), 0, hash );
 611     return STATUS_SUCCESS;
 612 }
 613
 614 NTSTATUS WINAPI BCryptHashData( BCRYPT_HASH_HANDLE handle, UCHAR *input, ULONG size, ULONG flags )
 615 {
 616     struct hash *hash = handle;
 617
 618     TRACE( "%p, %p, %u, %08x\n", handle, input, size, flags );
 619
 620     if (!hash || hash->hdr.magic != MAGIC_HASH) return STATUS_INVALID_HANDLE;
 621     if (!input) return STATUS_INVALID_PARAMETER;
 622
 623     return hash_update( hash, input, size );
 624 }
 625
 626 NTSTATUS WINAPI BCryptFinishHash( BCRYPT_HASH_HANDLE handle, UCHAR *output, ULONG size, ULONG flags )
 627 {
 628     struct hash *hash = handle;
 629
 630     TRACE( "%p, %p, %u, %08x\n", handle, output, size, flags );
 631
 632     if (!hash || hash->hdr.magic != MAGIC_HASH) return STATUS_INVALID_HANDLE;
 633     if (!output) return STATUS_INVALID_PARAMETER;
 634
 635     return hash_finish( hash, output, size );
 636 }
 637
 638 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
 639 {
 640     switch (reason)
 641     {
 642     case DLL_PROCESS_ATTACH:
 643         instance = hinst;
 644         DisableThreadLibraryCalls( hinst );
 645 #if defined(SONAME_LIBGNUTLS) && !defined(HAVE_COMMONCRYPTO_COMMONDIGEST_H)
 646         gnutls_initialize();
 647 #endif
 648         break;
 649
 650     case DLL_PROCESS_DETACH:
 651         if (reserved) break;
 652 #if defined(SONAME_LIBGNUTLS) && !defined(HAVE_COMMONCRYPTO_COMMONDIGEST_H)
 653         gnutls_uninitialize();
 654 #endif
 655         break;
 656     }
 657     return TRUE;
 658 }