We didn't use interactive service when gui was running
under admin because of some privilege escalation vulnerability in Vista.
Apparently this issue doesn't exist on Win7 and newer versions so
it is safe to use iservice on those systems.
Introduce "Always use interactive service" option,
which is "on" by default. This should enable users,
who by various reasons run gui as admin, use Wintun.
When gui is running as admin and interactive service
cannot be started or not installed, warn that wintun will not work.
Signed-off-by: Lev Stipakov <lev@openvpn.net>
As config group is reallocated when full, do not store the pointer to the
parent group. Instead use the id of the group which is invariant across
reallocs. Similarly in connection array store the id of the group
instead of a pointer.
Also
- Do not call ActivateConfigGroups() -- when connections are active:
in this case we want preserve config data structures during rescan.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
fixup
The number of configs is now unlimited. But there is a limit
of 2^16 menu items which permits only about 2^12 configs to be
displayed in the menu. A warning is shown if the number of
configs exceeds this value.
For a responsive menu keep the number of configs under ~1000.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Group all configs in a subdirectory with directory name
as the label.
- If any connection is active, newly found configs are
added to the root group to keep the logic simple.
- Directory hierarchy is scanned up to a depth of 4: i.e.,
config_dir and global_config_dir and its subdirectories
up to 3 levels down.
Only support for scanning configs and attaching group labels
is added here. Rendering the nested menu is the subject of
a later commit.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
When openvpn is run with --help option it pops up a help
message and exits when that window is closed. Such instances
cannot accept any commands and should not be treated as a
running instance.
Fix by
(i) When run with --help, promptly release the semaphore used
to restrict to a single running instance.
(ii) Wait for a short interval (200 msec) before timing out of
locking the semaphore. This helps avoid race conditions.
While at it also make sure the semaphore is released and closed
on exit.
Fixes issue: #237
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Implement connection specific env variables. These are merged
with the process environment strings and passed to scripts.
- To set an env variable, use 'echo setenv name value' in the config
or push from the server. This will set "OPENVPN_name=value" in
the connections's env set. Note that "name" is mangled as
"OPENVPN_name" to avoid servers overwriting sensitive variables
such as PATH. Names are set in the order received and same name
overwrites any previously set value.
- Environment variable names are allowed to contain only alpha numeric
characters and underscore as in openvpn.exe. But, unlike openvpn.exe,
invalid names are ignored, not sanitized.
v2 changes (Dec 16, 2017):
- If value is missing, the directive is interpreted as a delete command
and the env var with matching name in the connection's env set is removed.
- Windows needs env block to be ordered:
While merging connection specific env vars with process env block, order
the entries 'alphabetically' (locale independent, case insensitive
unicode ordinal order). In case of duplicates, the value in connection
env set replaces the one in process env.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- New option --command <action> <params> to send commands to
a running instance of openvpn-gui.exe
Supported actions are
connect, disconnect, reconnect
each of which takes the name of the config (with or without the
extension .ovpn) as a parameter;
disconnect_all, exit
which take no parameter and
silent_connection
which takes an optional parameter = 0 or 1 (1 is the default)
Examples: with the gui running, start a new instance as
openvpn-gui.exe --command disconnect myvpn : ask running instance
to disconnect myvpn if connected
openvpn-gui.exe --command status myvpn : ask running instance
to show the status window for myvpn if available
openvpn-gui.exe --command disconnect_all : ask running instance
to disconnect all active connections
- The second instance exits after issuing a SendMessage to the
already running instance. If no action is specified, the running
instance is notified to show a balloon to alert the user
- These messages may also be sent from scripts as COPYDATA messages
with the wData element specifying the action to execute and lpData
a pointer to the parameter. The dwData param must be one of
WM_OVPN_xxx with xxx = START, STOP, RESTART, STOPALL, EXIT or
SILENT. See main.h for their values.
v2: Bug fixes based on test reports from larson0815
here: https://github.com/selvanair/openvpn-gui/issues/5
and cron410 here: https://github.com/OpenVPN/openvpn-gui/issues/104
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- "Wrong username or password" message shown in the auth userpass dialog after
an auth failure
- "Wrong password" message shown in the private key password dialog after a
password failure.
These message texts are colored red by default (TODO: make the color customizable)
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- A new registry HKLM\Software\OpenVPN\disable_save_passwords
(32 bit DWORD value) may be set to a non-zero value to
disable password saving by users. Applies to both auth and
private key passwords. Usernames are always saved.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Set dpi-awareness to true in the manifest (i.e., "system-dpi aware")
- Check system dpi and scale and/or position widgets and windows
that depend on the system dpi (only components within the status
window are affected).
Note: Declaring dpi awareness eliminates automatic rescaling of
windows that causes blurred text on high dpi monitors.
Windows 8.1 and later allow per monitor dpi setting which is
not handled here.
Note: IDS_NFO_TOKEN_PASSWORD_CAPTION and IDS_NFO_TOKEN_PASSWORD_REQUEST
strings need translation.
TODO: support for selecting pkcs11-id from the GUI
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Add a base64 decode function using Windows CyptoAPI
- Move multibyte to widechar conversions to a function
- Add config name to caption of password dialogs to help user
identify the request
- Add new dialog template for generic password/PIN requests
and use it to handle dynamic challenge
Note 1: if dynamic challenge response verification fails, an auth-failed
message is returned by the server causing the GUI to clear any saved
password even if the user-auth dialog itself succeeeded.
Note 2: Dialog template ID_DLG_CHALLENGE_RESPONSE added to language
files may require translation.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Option ediitng dialogs are in two tabs: General and Advanced.
Proxy related options are left in the proxy tab. Options
config_dir, config_ext, log_dir, script timeouts and
service-only flag are in the Advanced tab. All other more commonly
used flags and options are in the General tab.
- As options are editable, save values in registry only when they differ
from the default values. This leaves the registry clean and makes changing
options and their defaults during updates easier.
- Entries for config_dir and log_dir must be absolute paths.
Environemental variables such as %PROFILEDIR% may be used
to construct these.
- Empty config_dir, config_ext and log_dir entries are silently
ignored (i.e., the current values are left unchanged).
- Store all numeric and boolean parameters in registry as DWORD instead of
strings.
- On startup, the default parameters are loaded, then the registry is read
and finally command-line parameters parsedi.
- Out of range script timeout values in registry truncated with a
warning instead of fatal error. This allows the user to access the
settings dialog and make corrections.
- Save proxy and language settings under the same
HKCU\Software\OpenVPN-GUI key as other options instead of under Nilings.
- Save the current version of the GUI in regsitry so that updates
can be detected and any needed registry cleanup done.
- If no version info is present in the registry any values in OpenVPN-GUI
key in HKCU are deleted for a clean start as this is the first version
to save registry values in HKCU. Language and proxy data if present
under Nilings is migrated.
Note: new controls in the General tab and newly added Advanced tab dialog
are copied to all language files from the English version. These need to
be translated.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Replace allow_password by a runtime check that enables password
change menu only when the user has write-access to the key file.
- Read exe_path and priority from HKLM and do not duplicate in HKCU.
- Always allow the user to view the config: edit will succeed if user
has write access.
- Always include the proxy settings tab which is the default.
- Remove the unused power event handling and disconnect_on_suspend key.
- Remove password_attempts -- user can stop the password dilaog
by clicking cancel.
- Remove allow_service: implicitly enabled if service_only is used.
- Deprecate removed options in cmd-line parser
- Update README.rst
- Close config file before exit in GetKeyFileName
- Close thread and dialog handles in passphrase.c
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Username and, optionally, password as well as the private
key passphrase are saved in config-specific registry keys
- All saved data are kept encrypted using DPAPI
- The passphrase dialog is skipped if a valid saved private
key password is available. However, the user-auth dialog
is always presented, prefilled with the saved username
and password.
Note: A text string "Save password" is added to three dialogs
in all language resource files. Additional text with ids
IDS_MENU_CLEARPASS and IDS_NFO_DELETE_PASS are added to the
STRINGTABLE only in the English language resource file.
All these need translations.
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Asynchronously read Input on the service pipe which are mostly
errors reported by the service. Display the errors on the status log
window and to the log file if its not opened by openvpn.
If/when openvpn fails to start or exits with error, close
the connection without waiting for management socket timeout.
v2:
- rebase to master
- fix a bug in setting manage.connected state
- ensure management socket is closed and resources freed before thread exit
Signed-off-by: Selva Nair <selva.nair@gmail.com>
When a connection is attempted using a config in a location
that would fail, offer an option to add the user to the "OpenVPN
Administrators" group. This is done using shell-execute which will
show a UAC prompt for elevation. If it fails (due to user chooses
NO or the UAC dialog fails) the connection is not started.
v2 Changes
- Rebase to master
- Automaticlaly add the admin group if it doesn't exist
- Allow unicode strings in debug output
- Use domain\username to identify user
- Fix the PrintDebug macro
Minor changes based on user feedback
- Bring the window back to foreground after UAC prompt completion
- Show a message if another connection is tried during authorization
- Do not add user to ovpn_admin_group if it is same as the built-in admin group
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Set default config directory (config_dir) to %UserProfile%\OpenVPN\config
(saved and read back from HKCU\Software\OpenVPN-GUI\config_dir)
- Add a global_config_dir variable read from HKLM\Software\OpenVPN\config_dir
or set to OpenVPN-install-path\config
- Scan both directories and their sub directories for connection profiles.
In case of name conflicts config_dir gets priority over global_config_dir
- Eliminate multiple warnings of duplicate configs
Fixed on review (Thanks to leobasilio@gmail.com)
- Fix wrongly used o.config_dir in 2 locations
- Unrelated: Added missing CheckIServiceStatus to service.h
Signed-off-by: Selva Nair <selva.nair@gmail.com>
- Handle early errors (openvpn exits before management connection is up)
with a helpful error message that points the user to view log.
- Include only readable config files in the connection list
- Warn if no connection profiles found
TODO: handle startup errors from interactive service
You can now define up to how many configuration files you want
to support by stating something like
./configure MAX_CONFIGS=150 ...
when invoking configure. Default value remains 50.
Lev Stipakov