/**
* mono_rand_try_get_bytes:
* @handle: A pointer to an RNG handle. Handle is set to NULL on failure.
* @buffer: A buffer into which to write random data.
* @buffer_size: Number of bytes to write into buffer.
* @error: Set on error.
*
* Returns: FALSE on failure and sets @error, TRUE on success.
*
* Extracts bytes from an RNG handle.
*/
gboolean
mono_rand_try_get_bytes (gpointer *handle, guchar *buffer, gint buffer_size, MonoError *error)
{
HCRYPTPROV provider;
mono_error_init (error);
g_assert (handle);
provider = (HCRYPTPROV) *handle;
if (!CryptGenRandom (provider, buffer_size, buffer)) {
CryptReleaseContext (provider, 0);
/* we may have lost our context with CryptoAPI, but all hope isn't lost yet! */
provider = (HCRYPTPROV) mono_rand_init (NULL, 0);
if (!CryptGenRandom (provider, buffer_size, buffer)) {
/* exception will be thrown in managed code */
CryptReleaseContext (provider, 0);
*handle = 0;
mono_error_set_execution_engine (error, "Failed to gen random bytes (%d)", GetLastError ());
return FALSE;
}
}
return TRUE;
}
static gpointer
rand_create (void)
{
mono_rand_open ();
return mono_rand_init (NULL, 0);
}
