89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
|
|
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
|
|
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
|
// PARTICULAR PURPOSE.
|
|
//
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|
|
|
//
|
|
//
|
|
// File: RandomNumGeneration.cpp
|
|
//
|
|
// Contents: This sample shows random number generation in CNG.
|
|
//
|
|
//
|
|
|
|
#define WIN32_NO_STATUS
|
|
#include <windows.h>
|
|
#undef WIN32_NO_STATUS
|
|
|
|
#include <winternl.h>
|
|
#include <ntstatus.h>
|
|
#include <winerror.h>
|
|
#include <stdio.h>
|
|
#include <bcrypt.h>
|
|
#include <sal.h>
|
|
|
|
//
|
|
// Utilities and helper functions
|
|
//
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
// ReportError
|
|
// Prints error information to the console
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
void
|
|
ReportError(
|
|
_In_ DWORD dwErrCode
|
|
)
|
|
{
|
|
wprintf( L"Error: 0x%08x (%d)\n", dwErrCode, dwErrCode );
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// wmain
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
DWORD
|
|
__cdecl
|
|
wmain(
|
|
_In_ int argc,
|
|
_In_reads_(argc) LPWSTR argv[]
|
|
)
|
|
{
|
|
NTSTATUS Status;
|
|
|
|
BYTE Buffer[128];
|
|
DWORD BufferSize;
|
|
|
|
BufferSize = sizeof (Buffer);
|
|
memset (Buffer, 0, BufferSize);
|
|
|
|
//
|
|
// Fill the buffer with random bytes
|
|
//
|
|
|
|
Status = BCryptGenRandom (
|
|
NULL, // Alg Handle pointer; NUll is passed as BCRYPT_USE_SYSTEM_PREFERRED_RNG flag is used
|
|
Buffer, // Address of the buffer that recieves the random number(s)
|
|
BufferSize, // Size of the buffer in bytes
|
|
BCRYPT_USE_SYSTEM_PREFERRED_RNG); // Flags
|
|
|
|
if( !NT_SUCCESS(Status) )
|
|
{
|
|
ReportError(Status);
|
|
goto cleanup;
|
|
}
|
|
|
|
Status = STATUS_SUCCESS;
|
|
|
|
cleanup:
|
|
|
|
return (DWORD)Status;
|
|
|
|
UNREFERENCED_PARAMETER( argc );
|
|
UNREFERENCED_PARAMETER( argv );
|
|
} |