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network-manager-wireguard-u.../src/nm-openvpn-service.c

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Copy openvpn project as base
2017-11-06 15:02:05 +03:00
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* nm-openvpn-service - openvpn integration with NetworkManager
*
* Copyright (C) 2005 - 2008 Tim Niemueller <tim@niemueller.de>
* Copyright (C) 2005 - 2010 Dan Williams <dcbw@redhat.com>
*
* 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; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* $Id: nm-openvpn-service.c 4232 2008-10-29 09:13:40Z tambeti $
*
*/
#include "nm-default.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <errno.h>
#include <locale.h>
#include <pwd.h>
#include <grp.h>
#include <glib-unix.h>
#include "utils.h"
#include "nm-utils/nm-shared-utils.h"
#include "nm-utils/nm-vpn-plugin-macros.h"
#if !defined(DIST_VERSION)
# define DIST_VERSION VERSION
#endif
#define RUNDIR LOCALSTATEDIR"/run/NetworkManager"
static struct {
gboolean debug;
int log_level;
int log_level_ovpn;
bool log_syslog;
GSList *pids_pending_list;
} gl/*obal*/;
#define NM_OPENVPN_HELPER_PATH LIBEXECDIR"/nm-openvpn-service-openvpn-helper"
/*****************************************************************************/
#define NM_TYPE_OPENVPN_PLUGIN (nm_openvpn_plugin_get_type ())
#define NM_OPENVPN_PLUGIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_OPENVPN_PLUGIN, NMOpenvpnPlugin))
#define NM_OPENVPN_PLUGIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), NM_TYPE_OPENVPN_PLUGIN, NMOpenvpnPluginClass))
#define NM_IS_OPENVPN_PLUGIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), NM_TYPE_OPENVPN_PLUGIN))
#define NM_IS_OPENVPN_PLUGIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), NM_TYPE_OPENVPN_PLUGIN))
#define NM_OPENVPN_PLUGIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), NM_TYPE_OPENVPN_PLUGIN, NMOpenvpnPluginClass))
typedef struct {
NMVpnServicePlugin parent;
} NMOpenvpnPlugin;
typedef struct {
NMVpnServicePluginClass parent;
} NMOpenvpnPluginClass;
GType nm_openvpn_plugin_get_type (void);
NMOpenvpnPlugin *nm_openvpn_plugin_new (const char *bus_name);
/*****************************************************************************/
typedef enum {
OPENVPN_BINARY_VERSION_INVALID,
OPENVPN_BINARY_VERSION_UNKNOWN,
OPENVPN_BINARY_VERSION_2_3_OR_OLDER,
OPENVPN_BINARY_VERSION_2_4_OR_NEWER,
} OpenvpnBinaryVersion;
typedef struct {
GPid pid;
guint watch_id;
guint kill_id;
NMOpenvpnPlugin *plugin;
} PidsPendingData;
typedef struct {
char *default_username;
char *username;
char *password;
char *priv_key_pass;
char *proxy_username;
char *proxy_password;
char *pending_auth;
char *challenge_state_id;
char *challenge_text;
GIOChannel *socket_channel;
guint socket_channel_eventid;
} NMOpenvpnPluginIOData;
typedef struct {
GPid pid;
guint connect_timer;
guint connect_count;
NMOpenvpnPluginIOData *io_data;
gboolean interactive;
char *mgt_path;
} NMOpenvpnPluginPrivate;
G_DEFINE_TYPE (NMOpenvpnPlugin, nm_openvpn_plugin, NM_TYPE_VPN_SERVICE_PLUGIN)
#define NM_OPENVPN_PLUGIN_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_OPENVPN_PLUGIN, NMOpenvpnPluginPrivate))
/*****************************************************************************/
typedef struct {
const char *name;
GType type;
gint int_min;
gint int_max;
gboolean address;
} ValidProperty;
static const ValidProperty valid_properties[] = {
{ NM_OPENVPN_KEY_AUTH, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_CA, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_CERT, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_CIPHER, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_KEYSIZE, G_TYPE_INT, 1, 65535, FALSE },
{ NM_OPENVPN_KEY_COMP_LZO, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_CONNECTION_TYPE, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_FLOAT, G_TYPE_BOOLEAN, 0, 0, FALSE },
{ NM_OPENVPN_KEY_FRAGMENT_SIZE, G_TYPE_INT, 0, G_MAXINT, FALSE },
{ NM_OPENVPN_KEY_KEY, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_LOCAL_IP, G_TYPE_STRING, 0, 0, TRUE },
{ NM_OPENVPN_KEY_MSSFIX, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_MTU_DISC, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_PING, G_TYPE_INT, 0, G_MAXINT, FALSE },
{ NM_OPENVPN_KEY_PING_EXIT, G_TYPE_INT, 0, G_MAXINT, FALSE },
{ NM_OPENVPN_KEY_PING_RESTART, G_TYPE_INT, 0, G_MAXINT, FALSE },
{ NM_OPENVPN_KEY_MAX_ROUTES, G_TYPE_INT, 0, 100000000, FALSE },
{ NM_OPENVPN_KEY_PROTO_TCP, G_TYPE_BOOLEAN, 0, 0, FALSE },
{ NM_OPENVPN_KEY_PORT, G_TYPE_INT, 1, 65535, FALSE },
{ NM_OPENVPN_KEY_PROXY_TYPE, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_PROXY_SERVER, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_PROXY_PORT, G_TYPE_INT, 1, 65535, FALSE },
{ NM_OPENVPN_KEY_PROXY_RETRY, G_TYPE_BOOLEAN, 0, 0, FALSE },
{ NM_OPENVPN_KEY_HTTP_PROXY_USERNAME, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_REMOTE, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_REMOTE_RANDOM, G_TYPE_BOOLEAN, 0, 0, FALSE },
{ NM_OPENVPN_KEY_REMOTE_IP, G_TYPE_STRING, 0, 0, TRUE },
{ NM_OPENVPN_KEY_RENEG_SECONDS, G_TYPE_INT, 0, G_MAXINT, FALSE },
{ NM_OPENVPN_KEY_STATIC_KEY, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_STATIC_KEY_DIRECTION, G_TYPE_INT, 0, 1, FALSE },
{ NM_OPENVPN_KEY_TA, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_TA_DIR, G_TYPE_INT, 0, 1, FALSE },
{ NM_OPENVPN_KEY_TAP_DEV, G_TYPE_BOOLEAN, 0, 0, FALSE },
{ NM_OPENVPN_KEY_DEV, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_DEV_TYPE, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_TUN_IPV6, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_TLS_CIPHER, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_TLS_CRYPT, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_TLS_REMOTE, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_VERIFY_X509_NAME, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_REMOTE_CERT_TLS, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_NS_CERT_TYPE, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_TUNNEL_MTU, G_TYPE_INT, 0, G_MAXINT, FALSE },
{ NM_OPENVPN_KEY_USERNAME, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_PASSWORD"-flags", G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_CERTPASS"-flags", G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_NOSECRET, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_HTTP_PROXY_PASSWORD"-flags", G_TYPE_STRING, 0, 0, FALSE },
{ NULL, G_TYPE_NONE, FALSE }
};
static const ValidProperty valid_secrets[] = {
{ NM_OPENVPN_KEY_PASSWORD, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_CERTPASS, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_NOSECRET, G_TYPE_STRING, 0, 0, FALSE },
{ NM_OPENVPN_KEY_HTTP_PROXY_PASSWORD, G_TYPE_STRING, 0, 0, FALSE },
{ NULL, G_TYPE_NONE, FALSE }
};
/*****************************************************************************/
#define _NMLOG(level, ...) \
G_STMT_START { \
if (gl.log_level >= (level)) { \
g_print ("nm-openvpn[%ld] %-7s " _NM_UTILS_MACRO_FIRST (__VA_ARGS__) "\n", \
(long) getpid (), \
nm_utils_syslog_to_str (level) \
_NM_UTILS_MACRO_REST (__VA_ARGS__)); \
} \
} G_STMT_END
static gboolean
_LOGD_enabled (void)
{
return gl.log_level >= LOG_INFO;
}
#define _LOGD(...) _NMLOG(LOG_INFO, __VA_ARGS__)
#define _LOGI(...) _NMLOG(LOG_NOTICE, __VA_ARGS__)
#define _LOGW(...) _NMLOG(LOG_WARNING, __VA_ARGS__)
/*****************************************************************************/
static const char *
openvpn_binary_find_exepath (void)
{
static const char *paths[] = {
"/usr/sbin/openvpn",
"/sbin/openvpn",
"/usr/local/sbin/openvpn",
};
int i;
for (i = 0; i < G_N_ELEMENTS (paths); i++) {
if (g_file_test (paths[i], G_FILE_TEST_EXISTS))
return paths[i];
}
return NULL;
}
static OpenvpnBinaryVersion
openvpn_binary_detect_version (const char *exepath)
{
gs_free char *s_stdout = NULL;
const char *s;
int exit_code;
int n;
g_return_val_if_fail (exepath && exepath[0] == '/', OPENVPN_BINARY_VERSION_UNKNOWN);
if (!g_spawn_sync (NULL,
(char *[]) { (char *) exepath, "--version", NULL },
NULL,
G_SPAWN_STDERR_TO_DEV_NULL,
NULL,
NULL,
&s_stdout,
NULL,
&exit_code,
NULL))
return OPENVPN_BINARY_VERSION_UNKNOWN;
if ( !WIFEXITED (exit_code)
|| WEXITSTATUS (exit_code) != 1) {
/* expect return code 1 (OPENVPN_EXIT_STATUS_USAGE) */
return OPENVPN_BINARY_VERSION_UNKNOWN;
}
/* the output for --version starts with title_string, which starts with PACKAGE_STRING,
* which looks like "OpenVPN 2.#...". Do a strict parsing here... */
if ( !s_stdout
|| !g_str_has_prefix (s_stdout, "OpenVPN 2."))
return OPENVPN_BINARY_VERSION_UNKNOWN;
s = &s_stdout[NM_STRLEN ("OpenVPN 2.")];
if (!g_ascii_isdigit (s[0]))
return OPENVPN_BINARY_VERSION_UNKNOWN;
n = 0;
do {
if (n > G_MAXINT / 100)
return OPENVPN_BINARY_VERSION_UNKNOWN;
n = (n * 10) + (s[0] - '0');
} while (g_ascii_isdigit ((++s)[0]));
if (n <= 3)
return OPENVPN_BINARY_VERSION_2_3_OR_OLDER;
return OPENVPN_BINARY_VERSION_2_4_OR_NEWER;
}
static OpenvpnBinaryVersion
openvpn_binary_detect_version_cached (const char *exepath, OpenvpnBinaryVersion *cached)
{
if (G_UNLIKELY (*cached == OPENVPN_BINARY_VERSION_INVALID))
*cached = openvpn_binary_detect_version (exepath);
return *cached;
}
/*****************************************************************************/
static void
pids_pending_data_free (PidsPendingData *pid_data)
{
nm_clear_g_source (&pid_data->watch_id);
nm_clear_g_source (&pid_data->kill_id);
if (pid_data->plugin)
g_object_remove_weak_pointer ((GObject *) pid_data->plugin, (gpointer *) &pid_data->plugin);
g_slice_free (PidsPendingData, pid_data);
}
static PidsPendingData *
pids_pending_get (GPid pid)
{
GSList *iter;
for (iter = gl.pids_pending_list; iter; iter = iter->next) {
if (((PidsPendingData *) iter->data)->pid == pid)
return iter->data;
}
g_return_val_if_reached (NULL);
}
static void openvpn_child_terminated (NMOpenvpnPlugin *plugin, GPid pid, gint status);
static void
pids_pending_child_watch_cb (GPid pid, gint status, gpointer user_data)
{
PidsPendingData *pid_data = user_data;
NMOpenvpnPlugin *plugin;
if (WIFEXITED (status)) {
int exit_status;
exit_status = WEXITSTATUS (status);
if (exit_status != 0)
_LOGW ("openvpn[%ld] exited with error code %d", (long) pid, exit_status);
else
_LOGI ("openvpn[%ld] exited with success", (long) pid);
}
else if (WIFSTOPPED (status))
_LOGW ("openvpn[%ld] stopped unexpectedly with signal %d", (long) pid, WSTOPSIG (status));
else if (WIFSIGNALED (status))
_LOGW ("openvpn[%ld] died with signal %d", (long) pid, WTERMSIG (status));
else
_LOGW ("openvpn[%ld] died from an unnatural cause", (long) pid);
g_return_if_fail (pid_data);
g_return_if_fail (pid_data->pid == pid);
g_return_if_fail (g_slist_find (gl.pids_pending_list, pid_data));
plugin = pid_data->plugin;
pid_data->watch_id = 0;
gl.pids_pending_list = g_slist_remove (gl.pids_pending_list , pid_data);
pids_pending_data_free (pid_data);
if (plugin)
openvpn_child_terminated (plugin, pid, status);
}
static void
pids_pending_add (GPid pid, NMOpenvpnPlugin *plugin)
{
PidsPendingData *pid_data;
g_return_if_fail (NM_IS_OPENVPN_PLUGIN (plugin));
g_return_if_fail (pid > 0);
_LOGI ("openvpn[%ld] started", (long) pid);
pid_data = g_slice_new (PidsPendingData);
pid_data->pid = pid;
pid_data->kill_id = 0;
pid_data->watch_id = g_child_watch_add (pid, pids_pending_child_watch_cb, pid_data);
pid_data->plugin = plugin;
g_object_add_weak_pointer ((GObject *) plugin, (gpointer *) &pid_data->plugin);
gl.pids_pending_list = g_slist_prepend (gl.pids_pending_list, pid_data);
}
static gboolean
pids_pending_ensure_killed (gpointer user_data)
{
PidsPendingData *pid_data = user_data;
g_return_val_if_fail (pid_data && pid_data == pids_pending_get (pid_data->pid), FALSE);
_LOGI ("openvpn[%ld]: send SIGKILL", (long) pid_data->pid);
pid_data->kill_id = 0;
kill (pid_data->pid, SIGKILL);
return FALSE;
}
static void
pids_pending_send_sigterm (GPid pid)
{
PidsPendingData *pid_data;
pid_data = pids_pending_get (pid);
g_return_if_fail (pid_data);
_LOGI ("openvpn[%ld]: send SIGTERM", (long) pid);
kill (pid, SIGTERM);
pid_data->kill_id = g_timeout_add (2000, pids_pending_ensure_killed, pid_data);
}
static void
pids_pending_wait_for_processes (GMainLoop *main_loop)
{
if (gl.pids_pending_list) {
_LOGI ("wait for %u openvpn processes to terminate...", g_slist_length (gl.pids_pending_list));
do {
g_main_context_iteration (g_main_loop_get_context (main_loop), TRUE);
} while (gl.pids_pending_list);
}
}
/*****************************************************************************/
static gboolean
validate_address (const char *address)
{
const char *p = address;
if (!address || !strlen (address))
return FALSE;
/* Ensure it's a valid DNS name or IP address */
while (*p) {
if (!isalnum (*p) && (*p != '-') && (*p != '.'))
return FALSE;
p++;
}
return TRUE;
}
typedef struct ValidateInfo {
const ValidProperty *table;
GError **error;
gboolean have_items;
} ValidateInfo;
static void
validate_one_property (const char *key, const char *value, gpointer user_data)
{
ValidateInfo *info = (ValidateInfo *) user_data;
int i;
if (*(info->error))
return;
info->have_items = TRUE;
/* 'name' is the setting name; always allowed but unused */
if (!strcmp (key, NM_SETTING_NAME))
return;
for (i = 0; info->table[i].name; i++) {
const ValidProperty *prop = &info->table[i];
long int tmp;
if (strcmp (prop->name, key))
continue;
switch (prop->type) {
case G_TYPE_STRING:
if (!prop->address || validate_address (value))
return; /* valid */
g_set_error (info->error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("invalid address “%s”"),
key);
break;
case G_TYPE_INT:
errno = 0;
tmp = strtol (value, NULL, 10);
if (errno == 0 && tmp >= prop->int_min && tmp <= prop->int_max)
return; /* valid */
g_set_error (info->error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("invalid integer property “%s” or out of range [%d -> %d]"),
key, prop->int_min, prop->int_max);
break;
case G_TYPE_BOOLEAN:
if (!strcmp (value, "yes") || !strcmp (value, "no"))
return; /* valid */
g_set_error (info->error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
/* Translators: keep "yes" and "no" untranslated! */
_("invalid boolean property “%s” (not yes or no)"),
key);
break;
default:
g_set_error (info->error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("unhandled property “%s” type %s"),
key, g_type_name (prop->type));
break;
}
}
/* Did not find the property from valid_properties or the type did not match */
if (!info->table[i].name) {
g_set_error (info->error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("property “%s” invalid or not supported"),
key);
}
}
static gboolean
nm_openvpn_properties_validate (NMSettingVpn *s_vpn, GError **error)
{
GError *validate_error = NULL;
ValidateInfo info = { &valid_properties[0], &validate_error, FALSE };
nm_setting_vpn_foreach_data_item (s_vpn, validate_one_property, &info);
if (!info.have_items) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("No VPN configuration options."));
return FALSE;
}
if (validate_error) {
*error = validate_error;
return FALSE;
}
return TRUE;
}
static gboolean
nm_openvpn_secrets_validate (NMSettingVpn *s_vpn, GError **error)
{
GError *validate_error = NULL;
ValidateInfo info = { &valid_secrets[0], &validate_error, FALSE };
nm_setting_vpn_foreach_secret (s_vpn, validate_one_property, &info);
if (validate_error) {
g_propagate_error (error, validate_error);
return FALSE;
}
return TRUE;
}
static void
nm_openvpn_disconnect_management_socket (NMOpenvpnPlugin *plugin)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
NMOpenvpnPluginIOData *io_data = priv->io_data;
/* This should not throw a warning since this can happen in
non-password modes */
if (!io_data)
return;
if (io_data->socket_channel_eventid)
g_source_remove (io_data->socket_channel_eventid);
if (io_data->socket_channel) {
g_io_channel_shutdown (io_data->socket_channel, FALSE, NULL);
g_io_channel_unref (io_data->socket_channel);
}
g_free (io_data->username);
g_free (io_data->proxy_username);
g_free (io_data->pending_auth);
if (io_data->password)
memset (io_data->password, 0, strlen (io_data->password));
g_free (io_data->password);
if (io_data->priv_key_pass)
memset (io_data->priv_key_pass, 0, strlen (io_data->priv_key_pass));
g_free (io_data->priv_key_pass);
if (io_data->proxy_password)
memset (io_data->proxy_password, 0, strlen (io_data->proxy_password));
g_free (io_data->proxy_password);
g_free (io_data->challenge_state_id);
g_free (io_data->challenge_text);
g_free (priv->io_data);
priv->io_data = NULL;
}
static char *
ovpn_quote_string (const char *unquoted)
{
char *quoted = NULL, *q;
char *u = (char *) unquoted;
g_return_val_if_fail (unquoted != NULL, NULL);
/* FIXME: use unpaged memory */
quoted = q = g_malloc0 (strlen (unquoted) * 2);
while (*u) {
/* Escape certain characters */
if (*u == ' ' || *u == '\\' || *u == '"')
*q++ = '\\';
*q++ = *u++;
}
return quoted;
}
static char *
get_detail (const char *input, const char *prefix)
{
const char *end;
nm_assert (prefix);
if (!g_str_has_prefix (input, prefix))
return NULL;
/* Grab characters until the next ' */
input += strlen (prefix);
end = strchr (input, '\'');
if (end)
return g_strndup (input, end - input);
return NULL;
}
/* Parse challenge response protocol message of the form
* CRV1:flags:state_id:username:text
*/
static gboolean
parse_challenge (const char *failure_reason, char **challenge_state_id, char **challenge_text)
{
const char *colon[4];
if ( !failure_reason
|| !g_str_has_prefix (failure_reason, "CRV1:"))
return FALSE;
colon[0] = strchr (failure_reason, ':');
if (!colon[0])
return FALSE;
colon[1] = strchr (colon[0] + 1, ':');
if (!colon[1])
return FALSE;
colon[2] = strchr (colon[1] + 1, ':');
if (!colon[2])
return FALSE;
colon[3] = strchr (colon[2] + 1, ':');
if (!colon[3])
return FALSE;
*challenge_state_id = g_strndup (colon[1] + 1, colon[2] - colon[1] - 1);
*challenge_text = g_strdup (colon[3] + 1);
return TRUE;
}
static void
write_user_pass (GIOChannel *channel,
const char *authtype,
const char *user,
const char *pass)
{
char *quser, *qpass, *buf;
/* Quote strings passed back to openvpn */
quser = ovpn_quote_string (user);
qpass = ovpn_quote_string (pass);
buf = g_strdup_printf ("username \"%s\" \"%s\"\n"
"password \"%s\" \"%s\"\n",
authtype, quser,
authtype, qpass);
memset (qpass, 0, strlen (qpass));
g_free (qpass);
g_free (quser);
/* Will always write everything in blocking channels (on success) */
g_io_channel_write_chars (channel, buf, strlen (buf), NULL, NULL);
g_io_channel_flush (channel, NULL);
memset (buf, 0, strlen (buf));
g_free (buf);
}
static gboolean
handle_auth (NMOpenvpnPluginIOData *io_data,
const char *requested_auth,
const char **out_message,
char ***out_hints)
{
gboolean handled = FALSE;
guint i = 0;
char **hints = NULL;
g_return_val_if_fail (requested_auth != NULL, FALSE);
g_return_val_if_fail (out_message != NULL, FALSE);
g_return_val_if_fail (out_hints != NULL, FALSE);
if (strcmp (requested_auth, "Auth") == 0) {
const char *username = io_data->username;
/* Fall back to the default username if it wasn't overridden by the user */
if (!username)
username = io_data->default_username;
if (username != NULL && io_data->password != NULL && io_data->challenge_state_id) {
gs_free char *response = NULL;
response = g_strdup_printf ("CRV1::%s::%s",
io_data->challenge_state_id,
io_data->password);
write_user_pass (io_data->socket_channel,
requested_auth,
username,
response);
nm_clear_g_free (&io_data->challenge_state_id);
nm_clear_g_free (&io_data->challenge_text);
} else if (username != NULL && io_data->password != NULL) {
write_user_pass (io_data->socket_channel,
requested_auth,
username,
io_data->password);
} else {
hints = g_new0 (char *, 3);
if (!username) {
hints[i++] = NM_OPENVPN_KEY_USERNAME;
*out_message = _("A username is required.");
}
if (!io_data->password) {
hints[i++] = NM_OPENVPN_KEY_PASSWORD;
*out_message = _("A password is required.");
}
if (!username && !io_data->password)
*out_message = _("A username and password are required.");
if (io_data->challenge_text)
*out_message = io_data->challenge_text;
}
handled = TRUE;
} else if (!strcmp (requested_auth, "Private Key")) {
if (io_data->priv_key_pass) {
char *qpass, *buf;
/* Quote strings passed back to openvpn */
qpass = ovpn_quote_string (io_data->priv_key_pass);
buf = g_strdup_printf ("password \"%s\" \"%s\"\n", requested_auth, qpass);
memset (qpass, 0, strlen (qpass));
g_free (qpass);
/* Will always write everything in blocking channels (on success) */
g_io_channel_write_chars (io_data->socket_channel, buf, strlen (buf), NULL, NULL);
g_io_channel_flush (io_data->socket_channel, NULL);
g_free (buf);
} else {
hints = g_new0 (char *, 2);
hints[i++] = NM_OPENVPN_KEY_CERTPASS;
*out_message = _("A private key password is required.");
}
handled = TRUE;
} else if (strcmp (requested_auth, "HTTP Proxy") == 0) {
if (io_data->proxy_username != NULL && io_data->proxy_password != NULL) {
write_user_pass (io_data->socket_channel,
requested_auth,
io_data->proxy_username,
io_data->proxy_password);
} else {
hints = g_new0 (char *, 3);
if (!io_data->proxy_username) {
hints[i++] = NM_OPENVPN_KEY_HTTP_PROXY_USERNAME;
*out_message = _("An HTTP Proxy username is required.");
}
if (!io_data->proxy_password) {
hints[i++] = NM_OPENVPN_KEY_HTTP_PROXY_PASSWORD;
*out_message = _("An HTTP Proxy password is required.");
}
if (!io_data->proxy_username && !io_data->proxy_password)
*out_message = _("An HTTP Proxy username and password are required.");
}
handled = TRUE;
}
*out_hints = hints;
return handled;
}
static gboolean
handle_management_socket (NMOpenvpnPlugin *plugin,
GIOChannel *source,
GIOCondition condition,
NMVpnPluginFailure *out_failure)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
gboolean again = TRUE;
char *str = NULL, *auth = NULL;
const char *message = NULL;
char **hints = NULL;
g_assert (out_failure);
if (!(condition & G_IO_IN))
return TRUE;
if (g_io_channel_read_line (source, &str, NULL, NULL, NULL) != G_IO_STATUS_NORMAL)
return TRUE;
if (!str[0]) {
g_free (str);
return TRUE;
}
_LOGD ("VPN request '%s'", str);
auth = get_detail (str, ">PASSWORD:Need '");
if (auth) {
if (priv->io_data->pending_auth)
g_free (priv->io_data->pending_auth);
priv->io_data->pending_auth = auth;
if (handle_auth (priv->io_data, auth, &message, &hints)) {
/* Request new secrets if we need any */
if (message) {
if (priv->interactive) {
gs_free char *joined = NULL;
_LOGD ("Requesting new secrets: '%s', %s%s%s", message,
NM_PRINT_FMT_QUOTED (hints, "(", (joined = g_strjoinv (",", (char **) hints)), ")", "no hints"));
nm_vpn_service_plugin_secrets_required ((NMVpnServicePlugin *) plugin, message, (const char **) hints);
} else {
/* Interactive not allowed, can't ask for more secrets */
_LOGW ("More secrets required but cannot ask interactively");
*out_failure = NM_VPN_PLUGIN_FAILURE_LOGIN_FAILED;
again = FALSE;
}
}
if (hints)
g_free (hints); /* elements are 'const' */
} else {
_LOGW ("Unhandled management socket request '%s'", auth);
*out_failure = NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED;
again = FALSE;
}
goto out;
}
auth = get_detail (str, ">PASSWORD:Verification Failed: '");
if (auth) {
gboolean fail = TRUE;
if (!strcmp (auth, "Auth")) {
gs_free char *failure_reason = NULL;
failure_reason = get_detail (auth, ">PASSWORD:Verification Failed: 'Auth' ['");
if (parse_challenge (failure_reason, &priv->io_data->challenge_state_id, &priv->io_data->challenge_text)) {
_LOGD ("Received challenge '%s' for state '%s'",
priv->io_data->challenge_state_id,
priv->io_data->challenge_text);
} else
_LOGW ("Password verification failed");
if (priv->interactive) {
/* Clear existing password in interactive mode, openvpn
* will request a new one after restarting.
*/
if (priv->io_data->password)
memset (priv->io_data->password, 0, strlen (priv->io_data->password));
g_clear_pointer (&priv->io_data->password, g_free);
fail = FALSE;
}
} else if (!strcmp (auth, "Private Key"))
_LOGW ("Private key verification failed");
else
_LOGW ("Unknown verification failed: %s", auth);
if (fail) {
*out_failure = NM_VPN_PLUGIN_FAILURE_LOGIN_FAILED;
again = FALSE;
}
g_free (auth);
}
out:
g_free (str);
return again;
}
static gboolean
nm_openvpn_socket_data_cb (GIOChannel *source, GIOCondition condition, gpointer user_data)
{
NMOpenvpnPlugin *plugin = NM_OPENVPN_PLUGIN (user_data);
NMVpnPluginFailure failure = NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED;
if (!handle_management_socket (plugin, source, condition, &failure)) {
nm_vpn_service_plugin_failure ((NMVpnServicePlugin *) plugin, failure);
return FALSE;
}
return TRUE;
}
static gboolean
nm_openvpn_connect_timer_cb (gpointer data)
{
NMOpenvpnPlugin *plugin = NM_OPENVPN_PLUGIN (data);
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
NMOpenvpnPluginIOData *io_data = priv->io_data;
struct sockaddr_un remote = { 0 };
int fd;
priv->connect_count++;
/* open socket and start listener */
fd = socket (AF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
_LOGW ("Could not create management socket");
nm_vpn_service_plugin_failure (NM_VPN_SERVICE_PLUGIN (plugin), NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED);
goto out;
}
remote.sun_family = AF_UNIX;
g_strlcpy (remote.sun_path, priv->mgt_path, sizeof (remote.sun_path));
if (connect (fd, (struct sockaddr *) &remote, sizeof (remote)) != 0) {
close (fd);
if (priv->connect_count <= 30)
return G_SOURCE_CONTINUE;
priv->connect_timer = 0;
_LOGW ("Could not open management socket");
nm_vpn_service_plugin_failure (NM_VPN_SERVICE_PLUGIN (plugin), NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED);
} else {
io_data->socket_channel = g_io_channel_unix_new (fd);
g_io_channel_set_encoding (io_data->socket_channel, NULL, NULL);
io_data->socket_channel_eventid = g_io_add_watch (io_data->socket_channel,
G_IO_IN,
nm_openvpn_socket_data_cb,
plugin);
}
out:
priv->connect_timer = 0;
return G_SOURCE_REMOVE;
}
static void
nm_openvpn_schedule_connect_timer (NMOpenvpnPlugin *plugin)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
if (priv->connect_timer == 0)
priv->connect_timer = g_timeout_add (200, nm_openvpn_connect_timer_cb, plugin);
}
static void
openvpn_child_terminated (NMOpenvpnPlugin *plugin, GPid pid, gint status)
{
NMOpenvpnPluginPrivate *priv;
NMVpnPluginFailure failure = NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED;
gboolean good_exit = FALSE;
g_return_if_fail (NM_IS_OPENVPN_PLUGIN (plugin));
priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
/* Reap child if needed. */
if (priv->pid != pid) {
/* the dead child is not the currently active process. Nothing to do, we just
* reaped the PID. */
return;
}
priv->pid = 0;
/* OpenVPN doesn't supply useful exit codes :( */
if (WIFEXITED (status) && WEXITSTATUS (status) == 0)
good_exit = TRUE;
/* Try to get the last bits of data from openvpn */
if (priv->io_data && priv->io_data->socket_channel) {
GIOChannel *channel = priv->io_data->socket_channel;
GIOCondition condition;
while ((condition = g_io_channel_get_buffer_condition (channel)) & G_IO_IN) {
if (!handle_management_socket (plugin, channel, condition, &failure)) {
good_exit = FALSE;
break;
}
}
}
if (good_exit)
nm_vpn_service_plugin_disconnect ((NMVpnServicePlugin *) plugin, NULL);
else
nm_vpn_service_plugin_failure ((NMVpnServicePlugin *) plugin, failure);
}
static gboolean
validate_auth (const char *auth)
{
if (auth) {
if ( !strcmp (auth, NM_OPENVPN_AUTH_NONE)
|| !strcmp (auth, NM_OPENVPN_AUTH_RSA_MD4)
|| !strcmp (auth, NM_OPENVPN_AUTH_MD5)
|| !strcmp (auth, NM_OPENVPN_AUTH_SHA1)
|| !strcmp (auth, NM_OPENVPN_AUTH_SHA224)
|| !strcmp (auth, NM_OPENVPN_AUTH_SHA256)
|| !strcmp (auth, NM_OPENVPN_AUTH_SHA384)
|| !strcmp (auth, NM_OPENVPN_AUTH_SHA512)
|| !strcmp (auth, NM_OPENVPN_AUTH_RIPEMD160))
return TRUE;
}
return FALSE;
}
static const char *
validate_connection_type (const char *ctype)
{
if (ctype) {
if ( !strcmp (ctype, NM_OPENVPN_CONTYPE_TLS)
|| !strcmp (ctype, NM_OPENVPN_CONTYPE_STATIC_KEY)
|| !strcmp (ctype, NM_OPENVPN_CONTYPE_PASSWORD)
|| !strcmp (ctype, NM_OPENVPN_CONTYPE_PASSWORD_TLS))
return ctype;
}
return NULL;
}
static gboolean
connection_type_is_tls_mode (const char *connection_type)
{
return strcmp (connection_type, NM_OPENVPN_CONTYPE_TLS) == 0
|| strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD) == 0
|| strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD_TLS) == 0;
}
static void
add_openvpn_arg (GPtrArray *args, const char *arg)
{
g_return_if_fail (args != NULL);
g_return_if_fail (arg != NULL);
g_ptr_array_add (args, g_strdup (arg));
}
static const char *
add_openvpn_arg_utf8safe (GPtrArray *args, const char *arg)
{
char *arg_unescaped;
g_return_val_if_fail (args, NULL);
g_return_val_if_fail (arg, NULL);
arg_unescaped = nm_utils_str_utf8safe_unescape_cp (arg);
g_ptr_array_add (args, arg_unescaped);
return arg_unescaped;
}
static gboolean
add_openvpn_arg_int (GPtrArray *args, const char *arg)
{
long int tmp_int;
g_return_val_if_fail (args != NULL, FALSE);
g_return_val_if_fail (arg != NULL, FALSE);
/* Convert -> int and back to string for security's sake since
* strtol() ignores some leading and trailing characters.
*/
errno = 0;
tmp_int = strtol (arg, NULL, 10);
if (errno != 0)
return FALSE;
g_ptr_array_add (args, (gpointer) g_strdup_printf ("%d", (guint32) tmp_int));
return TRUE;
}
static void
add_cert_args (GPtrArray *args, NMSettingVpn *s_vpn)
{
const char *ca, *cert, *key;
gs_free char *ca_free = NULL, *cert_free = NULL, *key_free = NULL;
g_return_if_fail (args != NULL);
g_return_if_fail (s_vpn != NULL);
ca = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CA);
cert = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CERT);
key = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_KEY);
ca = nm_utils_str_utf8safe_unescape (ca, &ca_free);
cert = nm_utils_str_utf8safe_unescape (cert, &cert_free);
key = nm_utils_str_utf8safe_unescape (key, &key_free);
if ( ca && strlen (ca)
&& cert && strlen (cert)
&& key && strlen (key)
&& !strcmp (ca, cert)
&& !strcmp (ca, key)) {
add_openvpn_arg (args, "--pkcs12");
add_openvpn_arg (args, ca);
} else {
if (ca && strlen (ca)) {
add_openvpn_arg (args, "--ca");
add_openvpn_arg (args, ca);
}
if (cert && strlen (cert)) {
add_openvpn_arg (args, "--cert");
add_openvpn_arg (args, cert);
}
if (key && strlen (key)) {
add_openvpn_arg (args, "--key");
add_openvpn_arg (args, key);
}
}
}
static void
update_io_data_from_vpn_setting (NMOpenvpnPluginIOData *io_data,
NMSettingVpn *s_vpn,
const char *default_username)
{
const char *tmp;
if (default_username) {
g_free (io_data->default_username);
io_data->default_username = g_strdup (default_username);
}
g_free (io_data->username);
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_USERNAME);
io_data->username = tmp ? g_strdup (tmp) : NULL;
if (io_data->password) {
memset (io_data->password, 0, strlen (io_data->password));
g_free (io_data->password);
}
tmp = nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_PASSWORD);
io_data->password = tmp ? g_strdup (tmp) : NULL;
if (io_data->priv_key_pass) {
memset (io_data->priv_key_pass, 0, strlen (io_data->priv_key_pass));
g_free (io_data->priv_key_pass);
}
tmp = nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_CERTPASS);
io_data->priv_key_pass = tmp ? g_strdup (tmp) : NULL;
g_free (io_data->proxy_username);
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_HTTP_PROXY_USERNAME);
io_data->proxy_username = tmp ? g_strdup (tmp) : NULL;
if (io_data->proxy_password) {
memset (io_data->proxy_password, 0, strlen (io_data->proxy_password));
g_free (io_data->proxy_password);
}
tmp = nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_HTTP_PROXY_PASSWORD);
io_data->proxy_password = tmp ? g_strdup (tmp) : NULL;
}
static char *
mgt_path_create (NMConnection *connection, GError **error)
{
int errsv;
/* Setup runtime directory */
if (g_mkdir_with_parents (RUNDIR, 0755) != 0) {
errsv = errno;
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Cannot create run-dir %s (%s)",
RUNDIR, g_strerror (errsv));
return NULL;
}
return g_strdup_printf (RUNDIR"/nm-openvpn-%s",
nm_connection_get_uuid (connection));
}
#define MAX_GROUPS 128
static gboolean
is_dir_writable (const char *dir, const char *user)
{
struct stat sb;
struct passwd *pw;
if (stat (dir, &sb) == -1)
return FALSE;
pw = getpwnam (user);
if (!pw)
return FALSE;
if (pw->pw_uid == 0)
return TRUE;
if (sb.st_mode & S_IWOTH)
return TRUE;
else if (sb.st_mode & S_IWGRP) {
/* Group has write access. Is user in that group? */
int i, ngroups = MAX_GROUPS;
gid_t groups[MAX_GROUPS];
getgrouplist (user, pw->pw_gid, groups, &ngroups);
for (i = 0; i < ngroups && i < MAX_GROUPS; i++) {
if (groups[i] == sb.st_gid)
return TRUE;
}
} else if (sb.st_mode & S_IWUSR) {
/* The owner has write access. Does the user own the file? */
if (pw->pw_uid == sb.st_uid)
return TRUE;
}
return FALSE;
}
/* Check existence of 'tmp' directory inside @chdir
* and write access in @chdir and @chdir/tmp for @user.
*/
static gboolean
check_chroot_dir_usability (const char *chdir, const char *user)
{
char *tmp_dir;
gboolean b1, b2;
tmp_dir = g_strdup_printf ("%s/tmp", chdir);
if (!g_file_test (tmp_dir, G_FILE_TEST_IS_DIR)) {
g_free (tmp_dir);
return FALSE;
}
b1 = is_dir_writable (chdir, user);
b2 = is_dir_writable (tmp_dir, user);
g_free (tmp_dir);
return b1 && b2;
}
static gboolean
nm_openvpn_start_openvpn_binary (NMOpenvpnPlugin *plugin,
NMConnection *connection,
GError **error)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
const char *openvpn_binary, *auth, *tmp, *tmp2, *tmp3, *tmp4;
gs_unref_ptrarray GPtrArray *args = NULL;
GPid pid;
gboolean dev_type_is_tap;
char *stmp;
const char *defport, *proto_tcp;
const char *tls_remote = NULL;
const char *nm_openvpn_user, *nm_openvpn_group, *nm_openvpn_chroot;
gs_free char *bus_name = NULL;
NMSettingVpn *s_vpn;
const char *connection_type;
gint64 v_int64;
char sbuf_64[65];
OpenvpnBinaryVersion openvpn_binary_version = OPENVPN_BINARY_VERSION_INVALID;
s_vpn = nm_connection_get_setting_vpn (connection);
if (!s_vpn) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_INVALID_CONNECTION,
_("Could not process the request because the VPN connection settings were invalid."));
return FALSE;
}
connection_type = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CONNECTION_TYPE);
if (!validate_connection_type (connection_type)) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid connection type."));
return FALSE;
}
/* Validate the properties */
if (!nm_openvpn_properties_validate (s_vpn, error))
return FALSE;
/* Validate secrets */
if (!nm_openvpn_secrets_validate (s_vpn, error))
return FALSE;
/* Find openvpn */
openvpn_binary = openvpn_binary_find_exepath ();
if (!openvpn_binary) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Could not find the openvpn binary."));
return FALSE;
}
auth = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_AUTH);
if (auth) {
if (!validate_auth(auth)) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid HMAC auth."));
return FALSE;
}
}
args = g_ptr_array_new_with_free_func (g_free);
add_openvpn_arg (args, openvpn_binary);
defport = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PORT);
if (defport && !defport[0])
defport = NULL;
proto_tcp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PROTO_TCP);
if (proto_tcp && !proto_tcp[0])
proto_tcp = NULL;
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE);
if (tmp && *tmp) {
gs_free char *tmp_clone = NULL;
char *tmp_remaining;
const char *tok;
tmp_remaining = tmp_clone = g_strdup (tmp);
while ((tok = strsep (&tmp_remaining, " \t,")) != NULL) {
gs_free char *str_free = NULL;
const char *host, *port, *proto;
gssize eidx;
eidx = nmovpn_remote_parse (tok,
&str_free,
&host,
&port,
&proto,
NULL);
if (eidx >= 0)
continue;
add_openvpn_arg (args, "--remote");
add_openvpn_arg (args, host);
if (port) {
if (!add_openvpn_arg_int (args, port)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid port number “%s”."), port);
return FALSE;
}
} else if (defport) {
if (!add_openvpn_arg_int (args, defport)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid port number “%s”."),
defport);
return FALSE;
}
} else
add_openvpn_arg (args, "1194"); /* default IANA port */
if (proto) {
if (nm_streq (proto, "tcp"))
add_openvpn_arg (args, "tcp-client");
else if (nm_streq (proto, "tcp4"))
add_openvpn_arg (args, "tcp4-client");
else if (nm_streq (proto, "tcp6"))
add_openvpn_arg (args, "tcp6-client");
else if (NM_IN_STRSET (proto, NMOVPN_PROTCOL_TYPES))
add_openvpn_arg (args, proto);
else {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid proto “%s”."), proto);
return FALSE;
}
} else if (proto_tcp && !strcmp (proto_tcp, "yes"))
add_openvpn_arg (args, "tcp-client");
else
add_openvpn_arg (args, "udp");
}
}
/* Remote random */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE_RANDOM);
if (tmp && !strcmp (tmp, "yes"))
add_openvpn_arg (args, "--remote-random");
/* tun-ipv6 */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TUN_IPV6);
if (tmp && !strcmp (tmp, "yes"))
add_openvpn_arg (args, "--tun-ipv6");
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PROXY_TYPE);
tmp2 = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PROXY_SERVER);
tmp3 = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PROXY_PORT);
tmp4 = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PROXY_RETRY);
if (tmp && strlen (tmp) && tmp2 && strlen (tmp2)) {
if (!strcmp (tmp, "http")) {
add_openvpn_arg (args, "--http-proxy");
add_openvpn_arg (args, tmp2);
add_openvpn_arg (args, tmp3 ? tmp3 : "8080");
add_openvpn_arg (args, "auto"); /* Automatic proxy auth method detection */
if (tmp4)
add_openvpn_arg (args, "--http-proxy-retry");
} else if (!strcmp (tmp, "socks")) {
add_openvpn_arg (args, "--socks-proxy");
add_openvpn_arg (args, tmp2);
add_openvpn_arg (args, tmp3 ? tmp3 : "1080");
if (tmp4)
add_openvpn_arg (args, "--socks-proxy-retry");
} else {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid proxy type “%s”."),
tmp);
return FALSE;
}
}
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_COMP_LZO);
/* openvpn understands 4 different modes for --comp-lzo, which have
* different meaning:
* 1) no --comp-lzo option
* 2) --comp-lzo yes
* 3) --comp-lzo [adaptive]
* 4) --comp-lzo no
*
* In the past, nm-openvpn only supported 1) and 2) by having no
* comp-lzo connection setting or "comp-lzo=yes", respectively.
*
* However, old plasma-nm would set "comp-lzo=no" in the connection
* to mean 1). Thus, "comp-lzo=no" is spoiled to mean 4) in order
* to preserve backward compatibily.
* We use instead a special value "no-by-default" to express "no".
*
* See bgo#769177
*/
if (NM_IN_STRSET (tmp, "no")) {
/* means no --comp-lzo option. */
tmp = NULL;
} else if (NM_IN_STRSET (tmp, "no-by-default"))
tmp = "no";
if (NM_IN_STRSET (tmp, "yes", "no", "adaptive")) {
add_openvpn_arg (args, "--comp-lzo");
add_openvpn_arg (args, tmp);
}
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_FLOAT);
if (tmp && !strcmp (tmp, "yes"))
add_openvpn_arg (args, "--float");
/* ping, ping-exit, ping-restart */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PING);
if (tmp) {
add_openvpn_arg (args, "--ping");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid ping duration “%s”."),
tmp);
return FALSE;
}
}
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PING_EXIT);
if (tmp) {
add_openvpn_arg (args, "--ping-exit");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid ping-exit duration “%s”."),
tmp);
return FALSE;
}
}
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PING_RESTART);
if (tmp) {
add_openvpn_arg (args, "--ping-restart");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid ping-restart duration “%s”."),
tmp);
return FALSE;
}
}
add_openvpn_arg (args, "--nobind");
/* max routes allowed from openvpn server */
tmp = nm_setting_vpn_get_data_item(s_vpn, NM_OPENVPN_KEY_MAX_ROUTES);
if (tmp) {
/* max-routes option is deprecated in 2.4 release
* https://github.com/OpenVPN/openvpn/commit/d0085293e709c8a722356cfa68ad74c962aef9a2
*/
add_openvpn_arg (args, "--max-routes");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid max-routes argument “%s”."),
tmp);
return FALSE;
}
}
/* Device and device type, defaults to tun */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_DEV);
tmp2 = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_DEV_TYPE);
tmp3 = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TAP_DEV);
add_openvpn_arg (args, "--dev");
if (tmp) {
const char *tmp_unescaped;
tmp_unescaped = add_openvpn_arg_utf8safe (args, tmp);
dev_type_is_tap = g_str_has_prefix (tmp_unescaped, "tap");
} else if (tmp2) {
add_openvpn_arg (args, tmp2);
dev_type_is_tap = FALSE; /* will be reset below (avoid maybe-uninitialized warning) */
} else if (tmp3 && !strcmp (tmp3, "yes")) {
add_openvpn_arg (args, "tap");
dev_type_is_tap = TRUE;
} else {
add_openvpn_arg (args, "tun");
dev_type_is_tap = FALSE;
}
/* Add '--dev-type' if the type was explicitly set */
if (tmp2) {
add_openvpn_arg (args, "--dev-type");
add_openvpn_arg (args, tmp2);
dev_type_is_tap = (strcmp (tmp2, "tap") == 0);
}
/* Cipher */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CIPHER);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--cipher");
add_openvpn_arg (args, tmp);
}
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TLS_CIPHER);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--tls-cipher");
add_openvpn_arg (args, tmp);
}
/* Keysize */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_KEYSIZE);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--keysize");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid keysize “%s”."),
tmp);
return FALSE;
}
}
/* Auth */
if (auth) {
add_openvpn_arg (args, "--auth");
add_openvpn_arg (args, auth);
}
add_openvpn_arg (args, "--auth-nocache");
/* tls-auth */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TA);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--tls-auth");
add_openvpn_arg_utf8safe (args, tmp);
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TA_DIR);
if (tmp && tmp[0])
add_openvpn_arg (args, tmp);
}
/* tls-crypt */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TLS_CRYPT);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--tls-crypt");
add_openvpn_arg_utf8safe (args, tmp);
}
/* tls-remote */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TLS_REMOTE);
if (tmp && tmp[0]) {
if (openvpn_binary_detect_version_cached (openvpn_binary, &openvpn_binary_version) != OPENVPN_BINARY_VERSION_2_4_OR_NEWER) {
_LOGW ("the tls-remote option is deprecated and removed from OpenVPN 2.4. Update your connection to use verify-x509-name");
add_openvpn_arg (args, "--tls-remote");
add_openvpn_arg (args, tmp);
} else {
_LOGW ("the tls-remote option is deprecated and removed from OpenVPN 2.4. For compatibility, the plugin uses \"verify-x509-name\" \"%s\" \"name\" instead. Update your connection to use verify-x509-name", tmp);
add_openvpn_arg (args, "--verify-x509-name");
add_openvpn_arg (args, tmp);
add_openvpn_arg (args, "name");
}
tls_remote = tmp;
}
/* verify-x509-name */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_VERIFY_X509_NAME);
if (tmp && tmp[0]) {
const char *name;
gs_free char *type = NULL;
if (tls_remote) {
g_set_error (error, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid configuration with tls-remote and verify-x509-name."));
return FALSE;
}
name = strchr (tmp, ':');
if (name) {
type = g_strndup (tmp, name - tmp);
name++;
} else
name = tmp;
if (!name[0] || !g_utf8_validate(name, -1, NULL)) {
g_set_error (error, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid verify-x509-name."));
return FALSE;
}
add_openvpn_arg (args, "--verify-x509-name");
add_openvpn_arg (args, name);
add_openvpn_arg (args, type ?: "subject");
}
/* remote-cert-tls */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE_CERT_TLS);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--remote-cert-tls");
add_openvpn_arg (args, tmp);
}
/* ns-cert-type */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_NS_CERT_TYPE);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--ns-cert-type");
add_openvpn_arg (args, tmp);
}
/* Reneg seconds */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_RENEG_SECONDS);
if (!connection_type_is_tls_mode (connection_type)) {
/* Ignore --reneg-sec option if we are not in TLS mode (as enabled
* by --client below). openvpn will error out otherwise, see bgo#749050. */
} else if (tmp && tmp[0]) {
add_openvpn_arg (args, "--reneg-sec");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid reneg seconds “%s”."),
tmp);
return FALSE;
}
} else {
/* Either the server and client must agree on the renegotiation
* interval, or it should be disabled on one side to prevent
* too-frequent renegotiations, which make two-factor auth quite
* painful.
*/
add_openvpn_arg (args, "--reneg-sec");
add_openvpn_arg (args, "0");
}
if (gl.log_level_ovpn >= 0) {
add_openvpn_arg (args, "--verb");
add_openvpn_arg (args, nm_sprintf_buf (sbuf_64, "%d", gl.log_level_ovpn));
}
if (gl.log_syslog) {
add_openvpn_arg (args, "--syslog");
add_openvpn_arg (args, "nm-openvpn");
}
/* TUN MTU size */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TUNNEL_MTU);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--tun-mtu");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid TUN MTU size “%s”."),
tmp);
return FALSE;
}
}
/* fragment size */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_FRAGMENT_SIZE);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--fragment");
if (!add_openvpn_arg_int (args, tmp)) {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid fragment size “%s”."),
tmp);
return FALSE;
}
}
/* mssfix */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_MSSFIX);
if (tmp) {
if (nm_streq (tmp, "yes"))
add_openvpn_arg (args, "--mssfix");
else if ((v_int64 = _nm_utils_ascii_str_to_int64 (tmp, 10, 1, G_MAXINT32, 0))) {
add_openvpn_arg (args, "--mssfix");
add_openvpn_arg (args, nm_sprintf_buf (sbuf_64, "%d", (int) v_int64));
}
}
/* mtu-disc */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_MTU_DISC);
if (NM_IN_STRSET (tmp, "no", "maybe", "yes")) {
add_openvpn_arg (args, "--mtu-disc");
add_openvpn_arg (args, tmp);
}
/* ifconfig */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_LOCAL_IP);
tmp2 = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE_IP);
if (tmp && tmp2) {
add_openvpn_arg (args, "--ifconfig");
add_openvpn_arg (args, tmp);
add_openvpn_arg (args, tmp2);
}
/* Punch script security in the face; this option was added to OpenVPN 2.1-rc9
* and defaults to disallowing any scripts, a behavior change from previous
* versions.
*/
add_openvpn_arg (args, "--script-security");
add_openvpn_arg (args, "2");
/* Up script, called when connection has been established or has been restarted */
add_openvpn_arg (args, "--up");
g_object_get (plugin, NM_VPN_SERVICE_PLUGIN_DBUS_SERVICE_NAME, &bus_name, NULL);
stmp = g_strdup_printf ("%s --debug %d %ld --bus-name %s %s --",
NM_OPENVPN_HELPER_PATH,
gl.log_level, (long) getpid(),
bus_name,
dev_type_is_tap ? "--tap" : "--tun");
add_openvpn_arg (args, stmp);
g_free (stmp);
add_openvpn_arg (args, "--up-restart");
/* Keep key and tun if restart is needed */
add_openvpn_arg (args, "--persist-key");
add_openvpn_arg (args, "--persist-tun");
/* Management socket for localhost access to supply username and password */
g_clear_pointer (&priv->mgt_path, g_free);
priv->mgt_path = mgt_path_create (connection, error);
if (!priv->mgt_path)
return FALSE;
add_openvpn_arg (args, "--management");
add_openvpn_arg (args, priv->mgt_path);
add_openvpn_arg (args, "unix");
add_openvpn_arg (args, "--management-client-user");
add_openvpn_arg (args, "root");
add_openvpn_arg (args, "--management-client-group");
add_openvpn_arg (args, "root");
/* Query on the management socket for user/pass */
add_openvpn_arg (args, "--management-query-passwords");
add_openvpn_arg (args, "--auth-retry");
add_openvpn_arg (args, "interact");
/* do not let openvpn setup routes or addresses, NM will handle it */
add_openvpn_arg (args, "--route-noexec");
add_openvpn_arg (args, "--ifconfig-noexec");
/* Now append configuration options which are dependent on the configuration type */
if (!strcmp (connection_type, NM_OPENVPN_CONTYPE_TLS)) {
add_openvpn_arg (args, "--client");
add_cert_args (args, s_vpn);
} else if (!strcmp (connection_type, NM_OPENVPN_CONTYPE_STATIC_KEY)) {
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_STATIC_KEY);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--secret");
add_openvpn_arg_utf8safe (args, tmp);
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_STATIC_KEY_DIRECTION);
if (tmp && tmp[0])
add_openvpn_arg (args, tmp);
}
} else if (!strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD)) {
/* Client mode */
add_openvpn_arg (args, "--client");
/* Use user/path authentication */
add_openvpn_arg (args, "--auth-user-pass");
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CA);
if (tmp && tmp[0]) {
add_openvpn_arg (args, "--ca");
add_openvpn_arg_utf8safe (args, tmp);
}
} else if (!strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD_TLS)) {
add_openvpn_arg (args, "--client");
add_cert_args (args, s_vpn);
/* Use user/path authentication */
add_openvpn_arg (args, "--auth-user-pass");
} else {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Unknown connection type “%s”."),
connection_type);
return FALSE;
}
/* Allow openvpn to be run as a specified user:group.
*
* We do this by default. The only way to disable it is by setting
* empty environment variables NM_OPENVPN_USER and NM_OPENVPN_GROUP. */
nm_openvpn_user = getenv ("NM_OPENVPN_USER") ?: NM_OPENVPN_USER;
nm_openvpn_group = getenv ("NM_OPENVPN_GROUP") ?: NM_OPENVPN_GROUP;
if (*nm_openvpn_user) {
if (getpwnam (nm_openvpn_user)) {
add_openvpn_arg (args, "--user");
add_openvpn_arg (args, nm_openvpn_user);
} else {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("User “%s” not found, check NM_OPENVPN_USER."),
nm_openvpn_user);
return FALSE;
}
}
if (*nm_openvpn_group) {
if (getgrnam (nm_openvpn_group)) {
add_openvpn_arg (args, "--group");
add_openvpn_arg (args, nm_openvpn_group);
} else {
g_set_error (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Group “%s” not found, check NM_OPENVPN_GROUP."),
nm_openvpn_group);
return FALSE;
}
}
/* we try to chroot be default. The only way to disable that is by
* setting the an empty environment variable NM_OPENVPN_CHROOT. */
nm_openvpn_chroot = getenv ("NM_OPENVPN_CHROOT") ?: NM_OPENVPN_CHROOT;
if (*nm_openvpn_chroot) {
if (check_chroot_dir_usability (nm_openvpn_chroot, nm_openvpn_user)) {
add_openvpn_arg (args, "--chroot");
add_openvpn_arg (args, nm_openvpn_chroot);
} else
_LOGW ("Directory '%s' not usable for chroot by '%s', openvpn will not be chrooted.",
nm_openvpn_chroot, nm_openvpn_user);
}
g_ptr_array_add (args, NULL);
{
gs_free char *cmd = NULL;
_LOGD ("EXEC: '%s'", (cmd = g_strjoinv (" ", (char **) args->pdata)));
}
if (!g_spawn_async (NULL, (char **) args->pdata, NULL,
G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL, &pid, error))
return FALSE;
pids_pending_add (pid, plugin);
g_warn_if_fail (!priv->pid);
priv->pid = pid;
/* Listen to the management socket for a few connection types:
PASSWORD: Will require username and password
X509USERPASS: Will require username and password and maybe certificate password
X509: May require certificate password
*/
if ( !strcmp (connection_type, NM_OPENVPN_CONTYPE_TLS)
|| !strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD)
|| !strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD_TLS)
|| nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_HTTP_PROXY_USERNAME)) {
priv->io_data = g_malloc0 (sizeof (NMOpenvpnPluginIOData));
update_io_data_from_vpn_setting (priv->io_data, s_vpn,
nm_setting_vpn_get_user_name (s_vpn));
nm_openvpn_schedule_connect_timer (plugin);
}
return TRUE;
}
static const char *
check_need_secrets (NMSettingVpn *s_vpn, gboolean *need_secrets)
{
const char *tmp, *key, *ctype;
NMSettingSecretFlags secret_flags = NM_SETTING_SECRET_FLAG_NONE;
gs_free char *key_free = NULL;
g_return_val_if_fail (s_vpn != NULL, FALSE);
g_return_val_if_fail (need_secrets != NULL, FALSE);
*need_secrets = FALSE;
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CONNECTION_TYPE);
ctype = validate_connection_type (tmp);
if (!ctype)
return NULL;
if (!strcmp (ctype, NM_OPENVPN_CONTYPE_PASSWORD_TLS)) {
/* Will require a password and maybe private key password */
key = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_KEY);
key = nm_utils_str_utf8safe_unescape (key, &key_free);
if (is_encrypted (key) && !nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_CERTPASS))
*need_secrets = TRUE;
if (!nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_PASSWORD)) {
*need_secrets = TRUE;
if (nm_setting_get_secret_flags (NM_SETTING (s_vpn), NM_OPENVPN_KEY_PASSWORD, &secret_flags, NULL)) {
if (secret_flags & NM_SETTING_SECRET_FLAG_NOT_REQUIRED)
*need_secrets = FALSE;
}
}
} else if (!strcmp (ctype, NM_OPENVPN_CONTYPE_PASSWORD)) {
/* Will require a password */
if (!nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_PASSWORD)) {
*need_secrets = TRUE;
if (nm_setting_get_secret_flags (NM_SETTING (s_vpn), NM_OPENVPN_KEY_PASSWORD, &secret_flags, NULL)) {
if (secret_flags & NM_SETTING_SECRET_FLAG_NOT_REQUIRED)
*need_secrets = FALSE;
}
}
} else if (!strcmp (ctype, NM_OPENVPN_CONTYPE_TLS)) {
/* May require private key password */
key = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_KEY);
key = nm_utils_str_utf8safe_unescape (key, &key_free);
if (is_encrypted (key) && !nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_CERTPASS))
*need_secrets = TRUE;
} else {
/* Static key doesn't need passwords */
}
/* HTTP Proxy might require a password; assume so if there's an HTTP proxy username */
tmp = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_HTTP_PROXY_USERNAME);
if (tmp && !nm_setting_vpn_get_secret (s_vpn, NM_OPENVPN_KEY_HTTP_PROXY_PASSWORD))
*need_secrets = TRUE;
return ctype;
}
static gboolean
real_disconnect (NMVpnServicePlugin *plugin,
GError **err)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
if (priv->mgt_path) {
/* openvpn does not cleanup the management socket upon exit,
* possibly it could not even because it changed user */
(void) unlink (priv->mgt_path);
g_clear_pointer (&priv->mgt_path, g_free);
}
if (priv->pid) {
pids_pending_send_sigterm (priv->pid);
priv->pid = 0;
}
return TRUE;
}
static gboolean
_connect_common (NMVpnServicePlugin *plugin,
NMConnection *connection,
GVariant *details,
GError **error)
{
GError *local = NULL;
if (!real_disconnect (plugin, &local)) {
_LOGW ("Could not clean up previous daemon run: %s", local->message);
g_error_free (local);
}
return nm_openvpn_start_openvpn_binary (NM_OPENVPN_PLUGIN (plugin),
connection,
error);
}
static gboolean
real_connect (NMVpnServicePlugin *plugin,
NMConnection *connection,
GError **error)
{
return _connect_common (plugin, connection, NULL, error);
}
static gboolean
real_connect_interactive (NMVpnServicePlugin *plugin,
NMConnection *connection,
GVariant *details,
GError **error)
{
if (!_connect_common (plugin, connection, details, error))
return FALSE;
NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin)->interactive = TRUE;
return TRUE;
}
static gboolean
real_need_secrets (NMVpnServicePlugin *plugin,
NMConnection *connection,
const char **setting_name,
GError **error)
{
NMSettingVpn *s_vpn;
const char *connection_type;
gboolean need_secrets = FALSE;
g_return_val_if_fail (NM_IS_VPN_SERVICE_PLUGIN (plugin), FALSE);
g_return_val_if_fail (NM_IS_CONNECTION (connection), FALSE);
if (_LOGD_enabled ()) {
_LOGD ("connection -------------------------------------");
nm_connection_dump (connection);
}
s_vpn = nm_connection_get_setting_vpn (connection);
if (!s_vpn) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_INVALID_CONNECTION,
_("Could not process the request because the VPN connection settings were invalid."));
return FALSE;
}
connection_type = check_need_secrets (s_vpn, &need_secrets);
if (!connection_type) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
_("Invalid connection type."));
return FALSE;
}
if (need_secrets)
*setting_name = NM_SETTING_VPN_SETTING_NAME;
return need_secrets;
}
static gboolean
real_new_secrets (NMVpnServicePlugin *plugin,
NMConnection *connection,
GError **error)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
NMSettingVpn *s_vpn;
const char *message = NULL;
char **hints = NULL;
s_vpn = nm_connection_get_setting_vpn (connection);
if (!s_vpn) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_INVALID_CONNECTION,
_("Could not process the request because the VPN connection settings were invalid."));
return FALSE;
}
_LOGD ("VPN received new secrets; sending to management interface");
update_io_data_from_vpn_setting (priv->io_data, s_vpn, NULL);
g_warn_if_fail (priv->io_data->pending_auth);
if (!handle_auth (priv->io_data, priv->io_data->pending_auth, &message, &hints)) {
g_set_error_literal (error,
NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_FAILED,
_("Unhandled pending authentication."));
return FALSE;
}
/* Request new secrets if we need any */
if (message) {
_LOGD ("Requesting new secrets: '%s'", message);
nm_vpn_service_plugin_secrets_required (plugin, message, (const char **) hints);
}
if (hints)
g_free (hints); /* elements are 'const' */
return TRUE;
}
static void
nm_openvpn_plugin_init (NMOpenvpnPlugin *plugin)
{
}
static void
dispose (GObject *object)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (object);
nm_clear_g_source (&priv->connect_timer);
if (priv->pid) {
pids_pending_send_sigterm (priv->pid);
priv->pid = 0;
}
G_OBJECT_CLASS (nm_openvpn_plugin_parent_class)->dispose (object);
}
static void
nm_openvpn_plugin_class_init (NMOpenvpnPluginClass *plugin_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (plugin_class);
NMVpnServicePluginClass *parent_class = NM_VPN_SERVICE_PLUGIN_CLASS (plugin_class);
g_type_class_add_private (object_class, sizeof (NMOpenvpnPluginPrivate));
object_class->dispose = dispose;
/* virtual methods */
parent_class->connect = real_connect;
parent_class->connect_interactive = real_connect_interactive;
parent_class->need_secrets = real_need_secrets;
parent_class->disconnect = real_disconnect;
parent_class->new_secrets = real_new_secrets;
}
static void
plugin_state_changed (NMOpenvpnPlugin *plugin,
NMVpnServiceState state,
gpointer user_data)
{
NMOpenvpnPluginPrivate *priv = NM_OPENVPN_PLUGIN_GET_PRIVATE (plugin);
switch (state) {
case NM_VPN_SERVICE_STATE_UNKNOWN:
case NM_VPN_SERVICE_STATE_INIT:
case NM_VPN_SERVICE_STATE_SHUTDOWN:
case NM_VPN_SERVICE_STATE_STOPPING:
case NM_VPN_SERVICE_STATE_STOPPED:
/* Cleanup on failure */
nm_clear_g_source (&priv->connect_timer);
nm_openvpn_disconnect_management_socket (plugin);
break;
default:
break;
}
}
NMOpenvpnPlugin *
nm_openvpn_plugin_new (const char *bus_name)
{
NMOpenvpnPlugin *plugin;
GError *error = NULL;
plugin = (NMOpenvpnPlugin *) g_initable_new (NM_TYPE_OPENVPN_PLUGIN, NULL, &error,
NM_VPN_SERVICE_PLUGIN_DBUS_SERVICE_NAME, bus_name,
NM_VPN_SERVICE_PLUGIN_DBUS_WATCH_PEER, !gl.debug,
NULL);
if (plugin) {
g_signal_connect (G_OBJECT (plugin), "state-changed", G_CALLBACK (plugin_state_changed), NULL);
} else {
_LOGW ("Failed to initialize a plugin instance: %s", error->message);
g_error_free (error);
}
return plugin;
}
static gboolean
signal_handler (gpointer user_data)
{
g_main_loop_quit (user_data);
return G_SOURCE_REMOVE;
}
static void
quit_mainloop (NMVpnServicePlugin *plugin, gpointer user_data)
{
g_main_loop_quit ((GMainLoop *) user_data);
}
int
main (int argc, char *argv[])
{
NMOpenvpnPlugin *plugin;
gboolean persist = FALSE;
GOptionContext *opt_ctx = NULL;
gchar *bus_name = NM_DBUS_SERVICE_OPENVPN;
GError *error = NULL;
GMainLoop *loop;
GOptionEntry options[] = {
{ "persist", 0, 0, G_OPTION_ARG_NONE, &persist, N_("Don’t quit when VPN connection terminates"), NULL },
{ "debug", 0, 0, G_OPTION_ARG_NONE, &gl.debug, N_("Enable verbose debug logging (may expose passwords)"), NULL },
{ "bus-name", 0, 0, G_OPTION_ARG_STRING, &bus_name, N_("D-Bus name to use for this instance"), NULL },
{NULL}
};
#if !GLIB_CHECK_VERSION (2, 35, 0)
g_type_init ();
#endif
if (getenv ("OPENVPN_DEBUG"))
gl.debug = TRUE;
/* locale will be set according to environment LC_* variables */
setlocale (LC_ALL, "");
bindtextdomain (GETTEXT_PACKAGE, NM_OPENVPN_LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
textdomain (GETTEXT_PACKAGE);
/* Parse options */
opt_ctx = g_option_context_new (NULL);
g_option_context_set_translation_domain (opt_ctx, GETTEXT_PACKAGE);
g_option_context_set_ignore_unknown_options (opt_ctx, FALSE);
g_option_context_set_help_enabled (opt_ctx, TRUE);
g_option_context_add_main_entries (opt_ctx, options, NULL);
g_option_context_set_summary (opt_ctx,
_("nm-openvpn-service provides integrated "
"OpenVPN capability to NetworkManager."));
if (!g_option_context_parse (opt_ctx, &argc, &argv, &error)) {
g_printerr ("Error parsing the command line options: %s\n", error->message);
g_option_context_free (opt_ctx);
g_clear_error (&error);
exit (1);
}
g_option_context_free (opt_ctx);
gl.log_level = _nm_utils_ascii_str_to_int64 (getenv ("NM_VPN_LOG_LEVEL"),
10, 0, LOG_DEBUG, -1);
if (gl.log_level >= 0) {
if (gl.log_level >= LOG_DEBUG)
gl.log_level_ovpn = 10;
else if (gl.log_level >= LOG_INFO)
gl.log_level_ovpn = 5;
else if (gl.log_level > 0)
gl.log_level_ovpn = 2;
else
gl.log_level_ovpn = 1;
} else if (gl.debug)
gl.log_level_ovpn = 10;
else {
/* the default level is already "--verb 1", which is fine for us. */
gl.log_level_ovpn = -1;
}
if (gl.log_level < 0)
gl.log_level = gl.debug ? LOG_INFO : LOG_NOTICE;
gl.log_syslog = _nm_utils_ascii_str_to_int64 (getenv ("NM_VPN_LOG_SYSLOG"),
10, 0, 1,
gl.debug ? 0 : 1);
_LOGD ("nm-openvpn-service (version " DIST_VERSION ") starting...");
if ( !g_file_test ("/sys/class/misc/tun", G_FILE_TEST_EXISTS)
&& (system ("/sbin/modprobe tun") == -1))
exit (EXIT_FAILURE);
plugin = nm_openvpn_plugin_new (bus_name);
if (!plugin)
exit (EXIT_FAILURE);
loop = g_main_loop_new (NULL, FALSE);
if (!persist)
g_signal_connect (plugin, "quit", G_CALLBACK (quit_mainloop), loop);
signal (SIGPIPE, SIG_IGN);
g_unix_signal_add (SIGTERM, signal_handler, loop);
g_unix_signal_add (SIGINT, signal_handler, loop);
g_main_loop_run (loop);
g_object_unref (plugin);
pids_pending_wait_for_processes (loop);
g_main_loop_unref (loop);
exit (EXIT_SUCCESS);
}