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
  22 #include <stdarg.h>
  23
  24 #include "ntstatus.h"
  25 #define WIN32_NO_STATUS
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "ntsecapi.h"
  29 #include "bcrypt.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(bcrypt);
  33
  34 BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
  35 {
  36     TRACE("fdwReason %u\n", fdwReason);
  37
  38     switch(fdwReason)
  39     {
  40         case DLL_PROCESS_ATTACH:
  41             DisableThreadLibraryCalls(hInstDLL);
  42             break;
  43     }
  44
  45     return TRUE;
  46 }
  47
  48 NTSTATUS WINAPI BCryptEnumAlgorithms(ULONG dwAlgOperations, ULONG *pAlgCount,
  49                                      BCRYPT_ALGORITHM_IDENTIFIER **ppAlgList, ULONG dwFlags)
  50 {
  51     FIXME("%08x, %p, %p, %08x - stub\n", dwAlgOperations, pAlgCount, ppAlgList, dwFlags);
  52
  53     *ppAlgList=NULL;
  54     *pAlgCount=0;
  55
  56     return STATUS_NOT_IMPLEMENTED;
  57 }
  58
  59 NTSTATUS WINAPI BCryptGenRandom(BCRYPT_ALG_HANDLE algorithm, UCHAR *buffer, ULONG count, ULONG flags)
  60 {
  61     const DWORD supported_flags = BCRYPT_USE_SYSTEM_PREFERRED_RNG;
  62     TRACE("%p, %p, %u, %08x - semi-stub\n", algorithm, buffer, count, flags);
  63
  64     if (!algorithm)
  65     {
  66         /* It's valid to call without an algorithm if BCRYPT_USE_SYSTEM_PREFERRED_RNG
  67          * is set. In this case the preferred system RNG is used.
  68          */
  69         if (!(flags & BCRYPT_USE_SYSTEM_PREFERRED_RNG))
  70             return STATUS_INVALID_HANDLE;
  71     }
  72     if (!buffer)
  73         return STATUS_INVALID_PARAMETER;
  74
  75     if (flags & ~supported_flags)
  76         FIXME("unsupported flags %08x\n", flags & ~supported_flags);
  77
  78     if (algorithm)
  79         FIXME("ignoring selected algorithm\n");
  80
  81     /* When zero bytes are requested the function returns success too. */
  82     if (!count)
  83         return STATUS_SUCCESS;
  84
  85     if (flags & BCRYPT_USE_SYSTEM_PREFERRED_RNG)
  86     {
  87         if (RtlGenRandom(buffer, count))
  88             return STATUS_SUCCESS;
  89     }
  90
  91     FIXME("called with unsupported parameters, returning error\n");
  92     return STATUS_NOT_IMPLEMENTED;
  93 }