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/* $Id$ */
/** @file
* VirtualBox External Authentication Library - Windows Logon Authentication.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/* If defined, debug messages will be written to the debugger. */
// #define AUTH_DEBUG
#include <iprt/win/windows.h>
#include <VBox/VBoxAuth.h>
#include <iprt/cdefs.h>
#ifdef AUTH_DEBUG
# include <stdio.h>
static void dprintfw(const WCHAR *fmt, ...)
{
va_list va;
va_start(va, fmt);
WCHAR buffer[1024];
_vsnwprintf(buffer, sizeof (buffer), fmt, va);
OutputDebugStringW(buffer);
va_end(va);
}
# define DBGAUTH(a) dprintfw a
#else
# define DBGAUTH(a)
#endif
static WCHAR g_wszEmpty[] = { L"" };
static void freeWideChar(WCHAR *pwszString)
{
if (pwszString && pwszString != &g_wszEmpty[0])
{
size_t cb = (wcslen(pwszString) + 1) * sizeof(WCHAR);
SecureZeroMemory(pwszString, cb);
free(pwszString);
}
}
static WCHAR *utf8ToWideChar(const char *pszString)
{
/*
* Shortcut for empty strings.
*/
if (!pszString || *pszString == 0)
return &g_wszEmpty[0];
/*
* Return NULL on errors.
*/
WCHAR *pwszString = NULL;
/*
* First calc result string length.
*/
const DWORD dwFlags = MB_ERR_INVALID_CHARS;
int cwc = MultiByteToWideChar(CP_UTF8, dwFlags, pszString, -1, NULL, 0);
if (cwc > 0)
{
/*
* Alloc space for result buffer.
*/
pwszString = (WCHAR *)malloc(cwc * sizeof(WCHAR));
if (pwszString)
{
/*
* Do the translation.
*/
if (MultiByteToWideChar(CP_UTF8, dwFlags, pszString, -1, pwszString, cwc) <= 0)
{
/* translation error */
free(pwszString);
pwszString = NULL;
}
}
}
return pwszString;
}
/* Prototype it to make sure we've got the right prototype. */
#if defined(_MSC_VER)
extern "C" __declspec(dllexport) FNAUTHENTRY3 AuthEntry;
#else
extern "C" FNAUTHENTRY3 AuthEntry;
#endif
/**
* @callback_method_impl{FNAUTHENTRY3}
*/
extern "C" DECLEXPORT(AuthResult) AUTHCALL
AuthEntry(const char *pszCaller,
PAUTHUUID pUuid,
AuthGuestJudgement guestJudgement,
const char *pszUser,
const char *pszPassword,
const char *pszDomain,
int fLogon,
unsigned clientId)
{
RT_NOREF4(pszCaller, pUuid, guestJudgement, clientId);
if (!fLogon)
{
/* Nothing to cleanup. The return code does not matter. */
return AuthResultAccessDenied;
}
LPWSTR pwszUsername = utf8ToWideChar(pszUser);
LPWSTR pwszDomain = utf8ToWideChar(pszDomain);
LPWSTR pwszPassword = utf8ToWideChar(pszPassword);
DBGAUTH((L"u[%ls], d[%ls], p[%ls]\n", lpwszUsername, lpwszDomain, lpwszPassword));
AuthResult result = AuthResultAccessDenied;
if (pwszUsername && pwszDomain && pwszPassword)
{
/* LOGON32_LOGON_INTERACTIVE is intended for users who will be interactively using the computer,
* such as a user being logged on by a terminal server, remote shell, or similar process.
*/
DWORD dwLogonType = LOGON32_LOGON_INTERACTIVE;
DWORD dwLogonProvider = LOGON32_PROVIDER_DEFAULT;
HANDLE hToken;
BOOL fSuccess = LogonUserW(pwszUsername,
pwszDomain,
pwszPassword,
dwLogonType,
dwLogonProvider,
&hToken);
if (fSuccess)
{
DBGAUTH((L"LogonUser success. hToken = %p\n", hToken));
result = AuthResultAccessGranted;
CloseHandle(hToken);
}
else
{
DBGAUTH((L"LogonUser failed %08X\n", GetLastError()));
}
}
freeWideChar(pwszUsername);
freeWideChar(pwszDomain);
freeWideChar(pwszPassword);
return result;
}
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