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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2024 OpenVPN Inc <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Win32-specific OpenVPN code, targeted at the mingw
* development environment.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "syshead.h"
#ifdef _WIN32
#include "buffer.h"
#include "win32-util.h"
WCHAR *
wide_string(const char *utf8, struct gc_arena *gc)
{
int n = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
WCHAR *ucs16 = gc_malloc(n * sizeof(WCHAR), false, gc);
MultiByteToWideChar(CP_UTF8, 0, utf8, -1, ucs16, n);
return ucs16;
}
char *
utf16to8(const wchar_t *utf16, struct gc_arena *gc)
{
char *utf8 = NULL;
int n = WideCharToMultiByte(CP_UTF8, 0, utf16, -1, NULL, 0, NULL, NULL);
if (n > 0)
{
utf8 = gc_malloc(n, true, gc);
if (utf8)
{
WideCharToMultiByte(CP_UTF8, 0, utf16, -1, utf8, n, NULL, NULL);
}
}
return utf8;
}
/*
* Return true if filename is safe to be used on Windows,
* by avoiding the following reserved names:
*
* CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9,
* LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9, and CLOCK$
*
* See: http://msdn.microsoft.com/en-us/library/aa365247.aspx
* and http://msdn.microsoft.com/en-us/library/86k9f82k(VS.80).aspx
*/
static bool
cmp_prefix(const char *str, const bool n, const char *pre)
{
size_t i = 0;
if (!str)
{
return false;
}
while (true)
{
const int c1 = pre[i];
int c2 = str[i];
++i;
if (c1 == '\0')
{
if (n)
{
if (isdigit(c2))
{
c2 = str[i];
}
else
{
return false;
}
}
return c2 == '\0' || c2 == '.';
}
else if (c2 == '\0')
{
return false;
}
if (c1 != tolower(c2))
{
return false;
}
}
}
bool
win_safe_filename(const char *fn)
{
if (cmp_prefix(fn, false, "con"))
{
return false;
}
if (cmp_prefix(fn, false, "prn"))
{
return false;
}
if (cmp_prefix(fn, false, "aux"))
{
return false;
}
if (cmp_prefix(fn, false, "nul"))
{
return false;
}
if (cmp_prefix(fn, true, "com"))
{
return false;
}
if (cmp_prefix(fn, true, "lpt"))
{
return false;
}
if (cmp_prefix(fn, false, "clock$"))
{
return false;
}
return true;
}
const char *
win_get_tempdir(void)
{
static char tmpdir[MAX_PATH];
WCHAR wtmpdir[MAX_PATH];
if (!GetTempPathW(_countof(wtmpdir), wtmpdir))
{
return NULL;
}
if (WideCharToMultiByte(CP_UTF8, 0, wtmpdir, -1, NULL, 0, NULL, NULL) > sizeof(tmpdir))
{
msg(M_WARN, "Could not get temporary directory. Path is too long."
" Consider using --tmp-dir");
return NULL;
}
WideCharToMultiByte(CP_UTF8, 0, wtmpdir, -1, tmpdir, sizeof(tmpdir), NULL, NULL);
return tmpdir;
}
#endif /* _WIN32 */
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