mono/utils/mono-rand-windows-uwp.c

   1 /**
   2  * \file
   3  * UWP rand support for Mono.
   4  *
   5  * Copyright 2016 Microsoft
   6  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   7 */
   8 #include <config.h>
   9 #include <glib.h>
  10 #include "mono/utils/mono-compiler.h"
  11
  12 #if G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT)
  13 #include <windows.h>
  14 #include "mono/utils/mono-rand-windows-internals.h"
  15
  16 MONO_WIN32_CRYPT_PROVIDER_HANDLE
  17 mono_rand_win_open_provider (void)
  18 {
  19         MONO_WIN32_CRYPT_PROVIDER_HANDLE provider = 0;
  20
  21         if (!BCRYPT_SUCCESS (BCryptOpenAlgorithmProvider (&provider, BCRYPT_RNG_ALGORITHM, NULL, 0)))
  22                 provider = 0;
  23
  24         return provider;
  25 }
  26
  27 gboolean
  28 mono_rand_win_gen (MONO_WIN32_CRYPT_PROVIDER_HANDLE provider, guchar *buffer, size_t buffer_size)
  29 {
  30         g_assert (provider != 0 && buffer != 0);
  31         return (BCRYPT_SUCCESS (BCryptGenRandom (provider, buffer, (ULONG) buffer_size, 0))) ? TRUE : FALSE;
  32 }
  33
  34 gboolean
  35 mono_rand_win_seed (MONO_WIN32_CRYPT_PROVIDER_HANDLE provider, guchar *seed, size_t seed_size)
  36 {
  37         g_assert (provider != 0 && seed != 0);
  38         return (BCRYPT_SUCCESS (BCryptGenRandom (provider, seed, (ULONG) seed_size, BCRYPT_RNG_USE_ENTROPY_IN_BUFFER))) ? TRUE : FALSE;
  39 }
  40
  41 void
  42 mono_rand_win_close_provider (MONO_WIN32_CRYPT_PROVIDER_HANDLE provider)
  43 {
  44         g_assert (provider != 0);
  45         BCryptCloseAlgorithmProvider (provider, 0);
  46 }
  47
  48 #else /* G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT) */
  49
  50 MONO_EMPTY_SOURCE_FILE (mono_rand_windows_uwp);
  51 #endif /* G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT) */