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openvpn-gui/proxy.c

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/*
* OpenVPN-GUI -- A Windows GUI for OpenVPN.
*
* Copyright (C) 2004 Mathias Sundman <mathias@nilings.se>
* 2009 Heiko Hund <heikoh@users.sf.net>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <windows.h>
#include <prsht.h>
#include <tchar.h>
#include <WinInet.h>
#include "config.h"
#include "main.h"
#include "options.h"
#include "registry.h"
#include "proxy.h"
#include "openvpn-gui-res.h"
#include "localization.h"
extern struct options o;
bool CALLBACK ProxySettingsDialogFunc (HWND hwndDlg, UINT msg, WPARAM wParam, UNUSED LPARAM lParam)
{
HICON hIcon;
LPPSHNOTIFY psn;
switch (msg) {
case WM_INITDIALOG:
hIcon = LoadLocalizedIcon(ID_ICO_APP);
if (hIcon) {
SendMessage(hwndDlg, WM_SETICON, (WPARAM) (ICON_SMALL), (LPARAM) (hIcon));
SendMessage(hwndDlg, WM_SETICON, (WPARAM) (ICON_BIG), (LPARAM) (hIcon));
}
/* Limit Port editbox to 5 chars. */
SendMessage(GetDlgItem(hwndDlg, ID_EDT_PROXY_PORT), EM_SETLIMITTEXT, 5, 0);
LoadProxySettings(hwndDlg);
break;
case WM_COMMAND:
switch (LOWORD(wParam)) {
case ID_RB_PROXY_OPENVPN:
if (HIWORD(wParam) == BN_CLICKED)
{
EnableWindow(GetDlgItem(hwndDlg, ID_RB_PROXY_HTTP), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_RB_PROXY_SOCKS), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_EDT_PROXY_ADDRESS), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_EDT_PROXY_PORT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_TXT_PROXY_ADDRESS), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_TXT_PROXY_PORT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_CB_PROXY_AUTH), FALSE);
}
break;
case ID_RB_PROXY_MSIE:
if (HIWORD(wParam) == BN_CLICKED)
{
EnableWindow(GetDlgItem(hwndDlg, ID_RB_PROXY_HTTP), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_RB_PROXY_SOCKS), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_EDT_PROXY_ADDRESS), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_EDT_PROXY_PORT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_TXT_PROXY_ADDRESS), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_TXT_PROXY_PORT), FALSE);
EnableWindow(GetDlgItem(hwndDlg, ID_CB_PROXY_AUTH), TRUE);
}
break;
case ID_RB_PROXY_MANUAL:
if (HIWORD(wParam) == BN_CLICKED)
{
EnableWindow(GetDlgItem(hwndDlg, ID_RB_PROXY_HTTP), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_RB_PROXY_SOCKS), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_EDT_PROXY_ADDRESS), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_EDT_PROXY_PORT), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_TXT_PROXY_ADDRESS), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_TXT_PROXY_PORT), TRUE);
EnableWindow(GetDlgItem(hwndDlg, ID_CB_PROXY_AUTH),
(IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_HTTP) == BST_CHECKED ? TRUE : FALSE));
}
break;
case ID_RB_PROXY_HTTP:
if (HIWORD(wParam) == BN_CLICKED)
{
EnableWindow(GetDlgItem(hwndDlg, ID_CB_PROXY_AUTH), TRUE);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, o.proxy_http_address);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, o.proxy_http_port);
}
break;
case ID_RB_PROXY_SOCKS:
if (HIWORD(wParam) == BN_CLICKED)
{
EnableWindow(GetDlgItem(hwndDlg, ID_CB_PROXY_AUTH), FALSE);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, o.proxy_socks_address);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, o.proxy_socks_port);
}
break;
}
break;
case WM_NOTIFY:
psn = (LPPSHNOTIFY) lParam;
if (psn->hdr.code == (UINT) PSN_KILLACTIVE)
{
SetWindowLong(hwndDlg, DWL_MSGRESULT,
( CheckProxySettings(hwndDlg) ? FALSE : TRUE ));
return TRUE;
}
else if (psn->hdr.code == (UINT) PSN_APPLY)
{
SaveProxySettings(hwndDlg);
SetWindowLong(hwndDlg, DWL_MSGRESULT, PSNRET_NOERROR);
return TRUE;
}
break;
case WM_CLOSE:
EndDialog(hwndDlg, LOWORD(wParam));
return TRUE;
}
return FALSE;
}
/* Check that proxy settings are valid */
int CheckProxySettings(HWND hwndDlg)
{
if (IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_MANUAL) == BST_CHECKED)
{
TCHAR text[100];
BOOL http = (IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_HTTP) == BST_CHECKED);
GetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, text, _tsizeof(text));
if (_tcslen(text) == 0)
{
/* proxy address not specified */
ShowLocalizedMsg((http ? IDS_ERR_HTTP_PROXY_ADDRESS : IDS_ERR_SOCKS_PROXY_ADDRESS));
return(0);
}
GetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, text, _tsizeof(text));
if (_tcslen(text) == 0)
{
/* proxy port not specified */
ShowLocalizedMsg((http ? IDS_ERR_HTTP_PROXY_PORT : IDS_ERR_SOCKS_PROXY_PORT));
return(0);
}
long port = _tcstol(text, NULL, 10);
if ((port < 1) || (port > 65535))
{
/* proxy port range error */
ShowLocalizedMsg((http ? IDS_ERR_HTTP_PROXY_PORT_RANGE : IDS_ERR_SOCKS_PROXY_PORT_RANGE));
return(0);
}
}
return(1);
}
void LoadProxySettings(HWND hwndDlg)
{
/* Set Proxy type, address and port */
if (o.proxy_type == 0) /* HTTP Proxy */
{
CheckRadioButton(hwndDlg, ID_RB_PROXY_HTTP, ID_RB_PROXY_SOCKS, ID_RB_PROXY_HTTP);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, o.proxy_http_address);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, o.proxy_http_port);
}
else /* SOCKS Proxy */
{
CheckRadioButton(hwndDlg, ID_RB_PROXY_HTTP, ID_RB_PROXY_SOCKS, ID_RB_PROXY_SOCKS);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, o.proxy_socks_address);
SetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, o.proxy_socks_port);
}
if (o.proxy_http_auth) CheckDlgButton(hwndDlg, ID_CB_PROXY_AUTH, BST_CHECKED);
/* Set Proxy Settings Source */
if (o.proxy_source == 0)
SendMessage(GetDlgItem(hwndDlg, ID_RB_PROXY_OPENVPN), BM_CLICK, 0, 0);
if (o.proxy_source == 1)
SendMessage(GetDlgItem(hwndDlg, ID_RB_PROXY_MSIE), BM_CLICK, 0, 0);
if (o.proxy_source == 2)
SendMessage(GetDlgItem(hwndDlg, ID_RB_PROXY_MANUAL), BM_CLICK, 0, 0);
}
void SaveProxySettings(HWND hwndDlg)
{
HKEY regkey;
DWORD dwDispos;
TCHAR proxy_source_string[2] = _T("0");
TCHAR proxy_type_string[2] = _T("0");
TCHAR proxy_http_auth_string[2] = _T("0");
/* Save Proxy Settings Source */
if (IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_OPENVPN) == BST_CHECKED)
{
o.proxy_source = 0;
proxy_source_string[0] = _T('0');
}
if (IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_MSIE) == BST_CHECKED)
{
o.proxy_source = 1;
proxy_source_string[0] = _T('1');
}
if (IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_MANUAL) == BST_CHECKED)
{
o.proxy_source = 2;
proxy_source_string[0] = _T('2');
}
/* Save Proxy type, address and port */
if (IsDlgButtonChecked(hwndDlg, ID_RB_PROXY_HTTP) == BST_CHECKED)
{
o.proxy_type = 0;
proxy_type_string[0] = _T('0');
GetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, o.proxy_http_address,
_tsizeof(o.proxy_http_address));
GetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, o.proxy_http_port,
_tsizeof(o.proxy_http_port));
BOOL auth = (IsDlgButtonChecked(hwndDlg, ID_CB_PROXY_AUTH) == BST_CHECKED);
o.proxy_http_auth = (auth ? 1 : 0);
proxy_http_auth_string[0] = (auth ? _T('1') : _T('0'));
}
else
{
o.proxy_type = 1;
proxy_type_string[0] = _T('1');
GetDlgItemText(hwndDlg, ID_EDT_PROXY_ADDRESS, o.proxy_socks_address,
_tsizeof(o.proxy_socks_address));
GetDlgItemText(hwndDlg, ID_EDT_PROXY_PORT, o.proxy_socks_port,
_tsizeof(o.proxy_socks_port));
}
/* Open Registry for writing */
if (RegCreateKeyEx(HKEY_CURRENT_USER,
GUI_REGKEY_HKCU,
0,
_T(""),
REG_OPTION_NON_VOLATILE,
KEY_WRITE,
NULL,
&regkey,
&dwDispos) != ERROR_SUCCESS)
{
/* error creating Registry-Key */
ShowLocalizedMsg(IDS_ERR_CREATE_REG_HKCU_KEY, GUI_REGKEY_HKCU);
return;
}
/* Save Settings to registry */
SetRegistryValue(regkey, _T("proxy_source"), proxy_source_string);
SetRegistryValue(regkey, _T("proxy_type"), proxy_type_string);
SetRegistryValue(regkey, _T("proxy_http_auth"), proxy_http_auth_string);
SetRegistryValue(regkey, _T("proxy_http_address"), o.proxy_http_address);
SetRegistryValue(regkey, _T("proxy_http_port"), o.proxy_http_port);
SetRegistryValue(regkey, _T("proxy_socks_address"), o.proxy_socks_address);
SetRegistryValue(regkey, _T("proxy_socks_port"), o.proxy_socks_port);
RegCloseKey(regkey);
}
void GetProxyRegistrySettings()
{
LONG status;
HKEY regkey;
TCHAR proxy_source_string[2] = _T("0");
TCHAR proxy_type_string[2] = _T("0");
TCHAR proxy_http_auth_string[2] = _T("0");
TCHAR temp_path[100];
/* Construct Authfile path */
if (!GetTempPath(_tsizeof(temp_path) - 1, temp_path))
{
/* Error getting TempPath - using C:\ */
ShowLocalizedMsg(IDS_ERR_GET_TEMP_PATH);
_tcscpy(temp_path, _T("C:\\"));
}
_tcsncat(temp_path, _T("openvpn_authfile.txt"),
_tsizeof(temp_path) - _tcslen(temp_path) - 1);
_tcsncpy(o.proxy_authfile, temp_path, _tsizeof(o.proxy_authfile));
/* Open Registry for reading */
status = RegOpenKeyEx(HKEY_CURRENT_USER,
GUI_REGKEY_HKCU,
0,
KEY_READ,
&regkey);
/* Return if can't open the registry key */
if (status != ERROR_SUCCESS) return;
/* get registry settings */
GetRegistryValue(regkey, _T("proxy_http_address"), o.proxy_http_address,
_tsizeof(o.proxy_http_address));
GetRegistryValue(regkey, _T("proxy_http_port"), o.proxy_http_port,
_tsizeof(o.proxy_http_port));
GetRegistryValue(regkey, _T("proxy_socks_address"), o.proxy_socks_address,
_tsizeof(o.proxy_socks_address));
GetRegistryValue(regkey, _T("proxy_socks_port"), o.proxy_socks_port,
_tsizeof(o.proxy_socks_port));
GetRegistryValue(regkey, _T("proxy_source"), proxy_source_string,
_tsizeof(proxy_source_string));
GetRegistryValue(regkey, _T("proxy_type"), proxy_type_string,
_tsizeof(proxy_type_string));
GetRegistryValue(regkey, _T("proxy_http_auth"), proxy_http_auth_string,
_tsizeof(proxy_http_auth_string));
if (proxy_source_string[0] == _T('1'))
o.proxy_source=1;
if (proxy_source_string[0] == _T('2'))
o.proxy_source=2;
if (proxy_source_string[0] == _T('3'))
o.proxy_source=3;
if (proxy_type_string[0] == _T('1'))
o.proxy_type=1;
if (proxy_http_auth_string[0] == _T('1'))
o.proxy_http_auth=1;
RegCloseKey(regkey);
}
BOOL CALLBACK ProxyAuthDialogFunc (HWND hwndDlg, UINT msg, WPARAM wParam, UNUSED LPARAM lParam)
{
TCHAR username[50];
TCHAR password[50];
FILE *fp;
switch (msg) {
case WM_INITDIALOG:
//SetForegroundWindow(hwndDlg);
break;
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDOK:
GetDlgItemText(hwndDlg, ID_EDT_PROXY_USER, username, _tsizeof(username) - 1);
GetDlgItemText(hwndDlg, ID_EDT_PROXY_PASS, password, _tsizeof(password) - 1);
if (!(fp = _tfopen(o.proxy_authfile, _T("w"))))
{
/* error creating AUTH file */
ShowLocalizedMsg(IDS_ERR_CREATE_AUTH_FILE, o.proxy_authfile);
EndDialog(hwndDlg, LOWORD(wParam));
}
_fputts(username, fp);
_fputts(_T("\n"), fp);
_fputts(password, fp);
_fputts(_T("\n"), fp);
fclose(fp);
EndDialog(hwndDlg, LOWORD(wParam));
return TRUE;
}
break;
case WM_CLOSE:
EndDialog(hwndDlg, LOWORD(wParam));
return TRUE;
}
return FALSE;
}
/*
* GetIeHttpProxy() fetches the current IE proxy settings for HTTP.
* Coded by Ewan Bhamrah Harley <code@ewan.info>, but refactored.
*
* If result string does not contain an '=' sign then there is a
* single proxy for all protocols. If multiple proxies are defined
* they are space seperated and have the form protocol=host[:port]
*/
static BOOL
GetIeHttpProxy(TCHAR *host, size_t *hostlen, TCHAR *port, size_t *portlen)
{
INTERNET_PROXY_INFO pinfo;
DWORD psize = sizeof(pinfo);
const TCHAR *start, *colon, *space, *end;
const size_t _hostlen = *hostlen;
const size_t _portlen = *portlen;
*hostlen = 0;
*portlen = 0;
if (!InternetQueryOption(NULL, INTERNET_OPTION_PROXY, (LPVOID) &pinfo, &psize))
{
ShowLocalizedMsg(IDS_ERR_GET_MSIE_PROXY);
return FALSE;
}
/* Check if a proxy is used */
if (pinfo.dwAccessType != INTERNET_OPEN_TYPE_PROXY)
return TRUE;
/* Check if a HTTP proxy is defined */
start = _tcsstr(pinfo.lpszProxy, _T("http="));
if (start == NULL && _tcschr(pinfo.lpszProxy, _T('=')))
return TRUE;
/* Get the pointers needed for string extraction */
start = (start ? start + 5 : pinfo.lpszProxy);
colon = _tcschr(start, _T(':'));
space = _tcschr(start, _T(' '));
/* Extract hostname */
end = (colon ? colon : space);
if (end)
*hostlen = end - start;
else
*hostlen = _tcslen(start);
if (_hostlen < *hostlen)
return FALSE;
_tcsncpy(host, start, *hostlen);
if (!colon)
return TRUE;
start = colon + 1;
end = space;
if (end)
*portlen = end - start;
else
*portlen = _tcslen(start);
if (_portlen < *portlen)
return FALSE;
_tcsncpy(port, start, *portlen);
return TRUE;
}
/*
* Construct the proxy options to append to the cmd-line.
*/
void ConstructProxyCmdLine(TCHAR *proxy_string_ptr, unsigned int size)
{
TCHAR proxy_string[100];
CLEAR(proxy_string);
if (o.proxy_source == PROXY_SOURCE_MANUAL)
{
if (o.proxy_type == PROXY_TYPE_HTTP)
{
if (o.proxy_http_auth == PROXY_HTTP_ASK_AUTH)
{
/* Ask for Proxy username/password */
LocalizedDialogBox(ID_DLG_PROXY_AUTH, ProxyAuthDialogFunc);
_sntprintf_0(proxy_string, _T("--http-proxy %s %s %s"),
o.proxy_http_address,
o.proxy_http_port,
o.proxy_authfile);
}
else
{
_sntprintf_0(proxy_string, _T("--http-proxy %s %s"),
o.proxy_http_address,
o.proxy_http_port);
}
}
if (o.proxy_type == PROXY_TYPE_SOCKS)
{
_sntprintf_0(proxy_string, _T("--socks-proxy %s %s"),
o.proxy_socks_address,
o.proxy_socks_port);
}
}
else if (o.proxy_source == PROXY_SOURCE_IE)
{
TCHAR host[64];
TCHAR port[6];
size_t hostlen = _tsizeof(host);
size_t portlen = _tsizeof(port);
if (GetIeHttpProxy(host, &hostlen, port, &portlen) && hostlen != 0)
{
if (o.proxy_http_auth == PROXY_HTTP_ASK_AUTH)
{
/* Ask for Proxy username/password */
LocalizedDialogBox(ID_DLG_PROXY_AUTH, ProxyAuthDialogFunc);
_sntprintf_0(proxy_string, _T("--http-proxy %s %s %s"),
host, (portlen ? port : _T("80")), o.proxy_authfile);
}
else
{
_sntprintf_0(proxy_string, _T("--http-proxy %s %s"),
host, (portlen ? port : _T("80")));
}
}
}
_tcsncpy(proxy_string_ptr, proxy_string, size);
}