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strongswan/src/charon-nm/nm/nm_service.c

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/*
* Copyright (C) 2017 Lubomir Rintel
*
* Copyright (C) 2013-2020 Tobias Brunner
* Copyright (C) 2008-2009 Martin Willi
* HSR Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "nm_service.h"
#include <daemon.h>
#include <networking/host.h>
#include <utils/identification.h>
#include <config/peer_cfg.h>
#include <credentials/certificates/x509.h>
#include <networking/tun_device.h>
#include <stdio.h>
/**
* Private data of NMStrongswanPlugin
*/
typedef struct {
/* implements bus listener interface */
listener_t listener;
/* IKE_SA we are listening on */
ike_sa_t *ike_sa;
/* backref to public plugin */
NMVpnServicePlugin *plugin;
/* credentials to use for authentication */
nm_creds_t *creds;
/* attribute handler for DNS/NBNS server information */
nm_handler_t *handler;
/* dummy TUN device */
tun_device_t *tun;
/* name of the connection */
char *name;
} NMStrongswanPluginPrivate;
G_DEFINE_TYPE_WITH_PRIVATE(NMStrongswanPlugin, nm_strongswan_plugin, NM_TYPE_VPN_SERVICE_PLUGIN)
#define NM_STRONGSWAN_PLUGIN_GET_PRIVATE(o) \
((NMStrongswanPluginPrivate*) \
nm_strongswan_plugin_get_instance_private (o))
/**
* Convert an address chunk to a GValue
*/
static GVariant *addr_to_variant(chunk_t addr)
{
GVariantBuilder builder;
int i;
switch (addr.len)
{
case 4:
return g_variant_new_uint32 (*(uint32_t*)addr.ptr);
case 16:
g_variant_builder_init (&builder, G_VARIANT_TYPE ("ay"));
for (i = 0; i < addr.len; i++)
{
g_variant_builder_add (&builder, "y", addr.ptr[i]);
}
return g_variant_builder_end (&builder);
default:
return NULL;
}
}
/**
* Convert a host to a GValue
*/
static GVariant *host_to_variant(host_t *host)
{
return addr_to_variant(host->get_address(host));
}
/**
* Convert enumerated handler chunks to a GValue
*/
static GVariant* handler_to_variant(nm_handler_t *handler, char *variant_type,
configuration_attribute_type_t type)
{
GVariantBuilder builder;
enumerator_t *enumerator;
chunk_t *chunk;
g_variant_builder_init (&builder, G_VARIANT_TYPE (variant_type));
enumerator = handler->create_enumerator(handler, type);
while (enumerator->enumerate(enumerator, &chunk))
{
g_variant_builder_add_value (&builder, addr_to_variant(*chunk));
}
enumerator->destroy(enumerator);
return g_variant_builder_end (&builder);
}
/**
* Signal IP config to NM, set connection as established
*/
static void signal_ip_config(NMVpnServicePlugin *plugin,
ike_sa_t *ike_sa, child_sa_t *child_sa)
{
NMStrongswanPlugin *pub = (NMStrongswanPlugin*)plugin;
NMStrongswanPluginPrivate *priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(pub);
GVariantBuilder builder, ip4builder, ip6builder;
GVariant *ip4config, *ip6config;
enumerator_t *enumerator;
host_t *me, *other, *vip4 = NULL, *vip6 = NULL;
nm_handler_t *handler;
g_variant_builder_init (&builder, G_VARIANT_TYPE_VARDICT);
g_variant_builder_init (&ip4builder, G_VARIANT_TYPE_VARDICT);
g_variant_builder_init (&ip6builder, G_VARIANT_TYPE_VARDICT);
handler = priv->handler;
/* NM apparently requires to know the gateway */
other = ike_sa->get_other_host(ike_sa);
g_variant_builder_add (&builder, "{sv}", NM_VPN_PLUGIN_CONFIG_EXT_GATEWAY,
host_to_variant(other));
/* systemd-resolved requires a device to properly install DNS servers, but
* Netkey does not use one. Passing the physical interface is not ideal,
* as NM fiddles around with it and systemd-resolved likes a separate
* device. So we pass a dummy TUN device along for NM etc. to play with...
*/
if (priv->tun)
{
g_variant_builder_add (&builder, "{sv}", NM_VPN_PLUGIN_CONFIG_TUNDEV,
g_variant_new_string (priv->tun->get_name(priv->tun)));
}
/* pass the first virtual IPs we got or use the physical IP */
enumerator = ike_sa->create_virtual_ip_enumerator(ike_sa, TRUE);
while (enumerator->enumerate(enumerator, &me))
{
switch (me->get_family(me))
{
case AF_INET:
if (!vip4)
{
vip4 = me;
}
break;
case AF_INET6:
if (!vip6)
{
vip6 = me;
}
break;
}
}
enumerator->destroy(enumerator);
if (!vip4 && !vip6)
{
me = ike_sa->get_my_host(ike_sa);
switch (me->get_family(me))
{
case AF_INET:
vip4 = me;
break;
case AF_INET6:
vip6 = me;
break;
}
}
if (vip4)
{
g_variant_builder_add (&ip4builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_ADDRESS,
host_to_variant(vip4));
g_variant_builder_add (&ip4builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_PREFIX,
g_variant_new_uint32 (vip4->get_address(vip4).len * 8));
/* prevent NM from changing the default route. we set our own route in our
* own routing table
*/
g_variant_builder_add (&ip4builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_NEVER_DEFAULT,
g_variant_new_boolean (TRUE));
g_variant_builder_add (&ip4builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_DNS,
handler_to_variant(handler, "au", INTERNAL_IP4_DNS));
g_variant_builder_add (&ip4builder, "{sv}", NM_VPN_PLUGIN_IP4_CONFIG_NBNS,
handler_to_variant(handler, "au", INTERNAL_IP4_NBNS));
}
if (vip6)
{
g_variant_builder_add (&ip6builder, "{sv}", NM_VPN_PLUGIN_IP6_CONFIG_ADDRESS,
host_to_variant(vip6));
g_variant_builder_add (&ip6builder, "{sv}", NM_VPN_PLUGIN_IP6_CONFIG_PREFIX,
g_variant_new_uint32 (vip6->get_address(vip6).len * 8));
g_variant_builder_add (&ip6builder, "{sv}", NM_VPN_PLUGIN_IP6_CONFIG_NEVER_DEFAULT,
g_variant_new_boolean (TRUE));
g_variant_builder_add (&ip6builder, "{sv}", NM_VPN_PLUGIN_IP6_CONFIG_DNS,
handler_to_variant(handler, "aay", INTERNAL_IP6_DNS));
/* NM_VPN_PLUGIN_IP6_CONFIG_NBNS is not defined */
}
ip4config = g_variant_builder_end (&ip4builder);
if (g_variant_n_children (ip4config))
{
g_variant_builder_add (&builder, "{sv}", NM_VPN_PLUGIN_CONFIG_HAS_IP4,
g_variant_new_boolean (TRUE));
}
else
{
g_variant_unref (ip4config);
ip4config = NULL;
}
ip6config = g_variant_builder_end (&ip6builder);
if (g_variant_n_children (ip6config))
{
g_variant_builder_add (&builder, "{sv}", NM_VPN_PLUGIN_CONFIG_HAS_IP6,
g_variant_new_boolean (TRUE));
}
else
{
g_variant_unref (ip6config);
ip6config = NULL;
}
handler->reset(handler);
nm_vpn_service_plugin_set_config (plugin, g_variant_builder_end (&builder));
if (ip4config)
{
nm_vpn_service_plugin_set_ip4_config (plugin, ip4config);
}
if (ip6config)
{
nm_vpn_service_plugin_set_ip6_config (plugin, ip6config);
}
}
/**
* signal failure to NM, connecting failed
*/
static void signal_failure(NMVpnServicePlugin *plugin, NMVpnPluginFailure failure)
{
NMStrongswanPlugin *pub = (NMStrongswanPlugin*)plugin;
nm_handler_t *handler = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(pub)->handler;
handler->reset(handler);
nm_vpn_service_plugin_failure(plugin, failure);
}
METHOD(listener_t, ike_state_change, bool,
NMStrongswanPluginPrivate *this, ike_sa_t *ike_sa, ike_sa_state_t state)
{
if (this->ike_sa == ike_sa && state == IKE_DESTROYING)
{
signal_failure(this->plugin, NM_VPN_PLUGIN_FAILURE_LOGIN_FAILED);
}
return TRUE;
}
METHOD(listener_t, child_state_change, bool,
NMStrongswanPluginPrivate *this, ike_sa_t *ike_sa, child_sa_t *child_sa,
child_sa_state_t state)
{
if (this->ike_sa == ike_sa && state == CHILD_DESTROYING)
{
signal_failure(this->plugin, NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED);
}
return TRUE;
}
METHOD(listener_t, ike_rekey, bool,
NMStrongswanPluginPrivate *this, ike_sa_t *old, ike_sa_t *new)
{
if (this->ike_sa == old)
{ /* follow a rekeyed IKE_SA */
this->ike_sa = new;
}
return TRUE;
}
METHOD(listener_t, ike_reestablish_pre, bool,
NMStrongswanPluginPrivate *this, ike_sa_t *old, ike_sa_t *new)
{
if (this->ike_sa == old)
{ /* ignore child state changes during redirects etc. (task migration) */
this->listener.child_state_change = NULL;
}
return TRUE;
}
METHOD(listener_t, ike_reestablish_post, bool,
NMStrongswanPluginPrivate *this, ike_sa_t *old, ike_sa_t *new,
bool initiated)
{
if (this->ike_sa == old && initiated)
{ /* if we get redirected during IKE_AUTH we just migrate to the new SA */
this->ike_sa = new;
/* re-register hooks to detect initiation failures */
this->listener.ike_state_change = _ike_state_change;
this->listener.child_state_change = _child_state_change;
}
return TRUE;
}
METHOD(listener_t, child_updown, bool,
NMStrongswanPluginPrivate *this, ike_sa_t *ike_sa, child_sa_t *child_sa,
bool up)
{
if (this->ike_sa == ike_sa && up)
{
/* disable initiate-failure-detection hooks */
this->listener.ike_state_change = NULL;
this->listener.child_state_change = NULL;
signal_ip_config(this->plugin, ike_sa, child_sa);
}
return TRUE;
}
/**
* Find a certificate for which we have a private key on a smartcard
*/
static identification_t *find_smartcard_key(NMStrongswanPluginPrivate *priv,
char *pin)
{
enumerator_t *enumerator, *sans;
identification_t *id = NULL;
certificate_t *cert;
x509_t *x509;
private_key_t *key;
chunk_t keyid;
enumerator = lib->credmgr->create_cert_enumerator(lib->credmgr,
CERT_X509, KEY_ANY, NULL, FALSE);
while (enumerator->enumerate(enumerator, &cert))
{
x509 = (x509_t*)cert;
/* there might be a lot of certificates, filter them by usage */
if ((x509->get_flags(x509) & X509_CLIENT_AUTH) &&
!(x509->get_flags(x509) & X509_CA))
{
keyid = x509->get_subjectKeyIdentifier(x509);
if (keyid.ptr)
{
/* try to find a private key by the certificate keyid */
priv->creds->set_pin(priv->creds, keyid, pin);
key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
KEY_ANY, BUILD_PKCS11_KEYID, keyid, BUILD_END);
if (key)
{
/* prefer a more convenient subjectAltName */
sans = x509->create_subjectAltName_enumerator(x509);
if (!sans->enumerate(sans, &id))
{
id = cert->get_subject(cert);
}
id = id->clone(id);
sans->destroy(sans);
DBG1(DBG_CFG, "using smartcard certificate '%Y'", id);
priv->creds->set_cert_and_key(priv->creds,
cert->get_ref(cert), key);
break;
}
}
}
}
enumerator->destroy(enumerator);
return id;
}
/**
* Add a client auth config for certificate authentication
*/
static bool add_auth_cfg_cert(NMStrongswanPluginPrivate *priv,
NMSettingVpn *vpn, peer_cfg_t *peer_cfg,
GError **err)
{
identification_t *id = NULL;
certificate_t *cert = NULL;
auth_cfg_t *auth;
const char *str, *method, *cert_source;
method = nm_setting_vpn_get_data_item(vpn, "method");
cert_source = nm_setting_vpn_get_data_item(vpn, "cert-source") ?: method;
if (streq(cert_source, "smartcard"))
{
char *pin;
pin = (char*)nm_setting_vpn_get_secret(vpn, "password");
if (pin)
{
id = find_smartcard_key(priv, pin);
}
if (!id)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"No usable smartcard certificate found.");
return FALSE;
}
}
/* ... or certificate/private key authentication */
else if ((str = nm_setting_vpn_get_data_item(vpn, "usercert")))
{
public_key_t *public;
private_key_t *private = NULL;
bool agent = streq(cert_source, "agent");
cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_FROM_FILE, str, BUILD_END);
if (!cert)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Loading peer certificate failed.");
return FALSE;
}
/* try agent */
str = nm_setting_vpn_get_secret(vpn, "agent");
if (agent && str)
{
public = cert->get_public_key(cert);
if (public)
{
private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
public->get_type(public),
BUILD_AGENT_SOCKET, str,
BUILD_PUBLIC_KEY, public,
BUILD_END);
public->destroy(public);
}
if (!private)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Connecting to SSH agent failed.");
}
}
/* ... or key file */
str = nm_setting_vpn_get_data_item(vpn, "userkey");
if (!agent && str)
{
char *secret;
secret = (char*)nm_setting_vpn_get_secret(vpn, "password");
if (secret)
{
priv->creds->set_key_password(priv->creds, secret);
}
private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
KEY_ANY, BUILD_FROM_FILE, str, BUILD_END);
if (!private)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Loading private key failed.");
}
}
if (private)
{
id = cert->get_subject(cert);
id = id->clone(id);
priv->creds->set_cert_and_key(priv->creds, cert, private);
}
else
{
DESTROY_IF(cert);
return FALSE;
}
}
else
{
g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Certificate is missing.");
return FALSE;
}
auth = auth_cfg_create();
if (streq(method, "eap-tls"))
{
auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_EAP);
auth->add(auth, AUTH_RULE_EAP_TYPE, EAP_TLS);
auth->add(auth, AUTH_RULE_AAA_IDENTITY,
identification_create_from_string("%any"));
}
else
{
auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
}
if (cert)
{
auth->add(auth, AUTH_RULE_SUBJECT_CERT, cert->get_ref(cert));
}
str = nm_setting_vpn_get_data_item(vpn, "local-identity");
if (str)
{
identification_t *local_id;
local_id = identification_create_from_string((char*)str);
if (local_id)
{
id->destroy(id);
id = local_id;
}
}
auth->add(auth, AUTH_RULE_IDENTITY, id);
peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
return TRUE;
}
/**
* Add a client auth config for username/password authentication
*/
static bool add_auth_cfg_pw(NMStrongswanPluginPrivate *priv,
NMSettingVpn *vpn, peer_cfg_t *peer_cfg,
GError **err)
{
identification_t *user = NULL, *id = NULL;
auth_cfg_t *auth;
const char *str, *method;
method = nm_setting_vpn_get_data_item(vpn, "method");
str = nm_setting_vpn_get_data_item(vpn, "user");
if (str)
{
user = identification_create_from_string((char*)str);
}
else
{
user = identification_create_from_string("%any");
}
str = nm_setting_vpn_get_data_item(vpn, "local-identity");
if (str)
{
id = identification_create_from_string((char*)str);
}
else
{
id = user->clone(user);
}
str = nm_setting_vpn_get_secret(vpn, "password");
if (streq(method, "psk"))
{
if (strlen(str) < 20)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Pre-shared key is too short.");
user->destroy(user);
id->destroy(id);
return FALSE;
}
priv->creds->set_username_password(priv->creds, id, (char*)str);
}
else
{
priv->creds->set_username_password(priv->creds, user, (char*)str);
}
auth = auth_cfg_create();
auth->add(auth, AUTH_RULE_AUTH_CLASS,
streq(method, "psk") ? AUTH_CLASS_PSK : AUTH_CLASS_EAP);
/* in case EAP-PEAP or EAP-TTLS is used we currently accept any identity */
auth->add(auth, AUTH_RULE_AAA_IDENTITY,
identification_create_from_string("%any"));
auth->add(auth, AUTH_RULE_EAP_IDENTITY, user);
auth->add(auth, AUTH_RULE_IDENTITY, id);
peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
return TRUE;
}
/**
* Connect function called from NM via DBUS
*/
static gboolean connect_(NMVpnServicePlugin *plugin, NMConnection *connection,
GError **err)
{
NMStrongswanPlugin *pub = (NMStrongswanPlugin*)plugin;
NMStrongswanPluginPrivate *priv;
NMSettingConnection *conn;
NMSettingVpn *vpn;
enumerator_t *enumerator;
identification_t *gateway = NULL;
const char *str, *method;
bool virtual, proposal;
proposal_t *prop;
ike_cfg_t *ike_cfg;
peer_cfg_t *peer_cfg;
child_cfg_t *child_cfg;
traffic_selector_t *ts;
ike_sa_t *ike_sa;
auth_cfg_t *auth;
certificate_t *cert = NULL;
x509_t *x509;
bool loose_gateway_id = FALSE;
ike_cfg_create_t ike = {
.version = IKEV2,
.local = "%any",
.local_port = charon->socket->get_port(charon->socket, FALSE),
.remote_port = IKEV2_UDP_PORT,
.fragmentation = FRAGMENTATION_YES,
};
peer_cfg_create_t peer = {
.cert_policy = CERT_SEND_IF_ASKED,
.unique = UNIQUE_REPLACE,
.rekey_time = 36000, /* 10h */
.jitter_time = 600, /* 10min */
.over_time = 600, /* 10min */
};
child_cfg_create_t child = {
.lifetime = {
.time = {
.life = 10800 /* 3h */,
.rekey = 10200 /* 2h50min */,
.jitter = 300 /* 5min */
},
},
.mode = MODE_TUNNEL,
.dpd_action = ACTION_RESTART,
.close_action = ACTION_RESTART,
};
/**
* Read parameters
*/
priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(pub);
conn = NM_SETTING_CONNECTION(nm_connection_get_setting(connection,
NM_TYPE_SETTING_CONNECTION));
vpn = NM_SETTING_VPN(nm_connection_get_setting(connection,
NM_TYPE_SETTING_VPN));
if (priv->name)
{
free(priv->name);
}
priv->name = strdup(nm_setting_connection_get_id(conn));
DBG1(DBG_CFG, "received initiate for NetworkManager connection %s",
priv->name);
DBG4(DBG_CFG, "%s",
nm_setting_to_string(NM_SETTING(vpn)));
if (!priv->tun)
{
DBG1(DBG_CFG, "failed to create dummy TUN device, might affect DNS "
"server installation negatively");
}
ike.remote = (char*)nm_setting_vpn_get_data_item(vpn, "address");
if (!ike.remote || !*ike.remote)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Gateway address missing.");
return FALSE;
}
str = nm_setting_vpn_get_data_item(vpn, "server-port");
if (str && strlen(str))
{
ike.remote_port = settings_value_as_int((char*)str, ike.remote_port);
}
str = nm_setting_vpn_get_data_item(vpn, "virtual");
virtual = streq(str, "yes");
str = nm_setting_vpn_get_data_item(vpn, "encap");
ike.force_encap = streq(str, "yes");
str = nm_setting_vpn_get_data_item(vpn, "ipcomp");
child.options |= streq(str, "yes") ? OPT_IPCOMP : 0;
/**
* Register credentials
*/
priv->creds->clear(priv->creds);
/* gateway/CA cert */
str = nm_setting_vpn_get_data_item(vpn, "certificate");
if (str)
{
cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, CERT_X509,
BUILD_FROM_FILE, str, BUILD_END);
if (!cert)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Loading gateway certificate failed.");
return FALSE;
}
priv->creds->add_certificate(priv->creds, cert);
}
else
{
/* no certificate defined, fall back to system-wide CA certificates */
priv->creds->load_ca_dir(priv->creds, lib->settings->get_str(
lib->settings, "charon-nm.ca_dir", NM_CA_DIR));
}
str = nm_setting_vpn_get_data_item(vpn, "remote-identity");
if (str)
{
gateway = identification_create_from_string((char*)str);
}
else if (cert)
{
x509 = (x509_t*)cert;
if (!(x509->get_flags(x509) & X509_CA))
{ /* for server certificates, we use the subject as identity */
gateway = cert->get_subject(cert);
gateway = gateway->clone(gateway);
}
}
if (!gateway || gateway->get_type(gateway) == ID_ANY)
{
/* if the user configured a CA certificate (or an invalid identity),
* we use the IP/hostname of the server */
gateway = identification_create_from_string(ike.remote);
loose_gateway_id = TRUE;
}
DBG1(DBG_CFG, "using gateway identity '%Y'", gateway);
/**
* Set up configurations
*/
ike_cfg = ike_cfg_create(&ike);
str = nm_setting_vpn_get_data_item(vpn, "proposal");
proposal = streq(str, "yes");
str = nm_setting_vpn_get_data_item(vpn, "ike");
if (proposal && str && strlen(str))
{
enumerator = enumerator_create_token(str, ";", "");
while (enumerator->enumerate(enumerator, &str))
{
prop = proposal_create_from_string(PROTO_IKE, str);
if (!prop)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_LAUNCH_FAILED,
"Invalid IKE proposal.");
enumerator->destroy(enumerator);
ike_cfg->destroy(ike_cfg);
gateway->destroy(gateway);
return FALSE;
}
ike_cfg->add_proposal(ike_cfg, prop);
}
enumerator->destroy(enumerator);
}
else
{
ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
ike_cfg->add_proposal(ike_cfg, proposal_create_default_aead(PROTO_IKE));
}
peer_cfg = peer_cfg_create(priv->name, ike_cfg, &peer);
if (virtual)
{
peer_cfg->add_virtual_ip(peer_cfg, host_create_any(AF_INET));
peer_cfg->add_virtual_ip(peer_cfg, host_create_any(AF_INET6));
}
method = nm_setting_vpn_get_data_item(vpn, "method");
if (streq(method, "cert") ||
streq(method, "eap-tls") ||
streq(method, "key") ||
streq(method, "agent") ||
streq(method, "smartcard"))
{
if (!add_auth_cfg_cert (priv, vpn, peer_cfg, err))
{
peer_cfg->destroy(peer_cfg);
ike_cfg->destroy(ike_cfg);
gateway->destroy(gateway);
return FALSE;
}
}
else if (streq(method, "eap") ||
streq(method, "psk"))
{
if (!add_auth_cfg_pw(priv, vpn, peer_cfg, err))
{
peer_cfg->destroy(peer_cfg);
ike_cfg->destroy(ike_cfg);
gateway->destroy(gateway);
return FALSE;
}
}
else
{
g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
"Configuration parameters missing.");
peer_cfg->destroy(peer_cfg);
ike_cfg->destroy(ike_cfg);
gateway->destroy(gateway);
return FALSE;
}
auth = auth_cfg_create();
if (streq(method, "psk"))
{
auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
}
else
{
auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
}
auth->add(auth, AUTH_RULE_IDENTITY, gateway);
auth->add(auth, AUTH_RULE_IDENTITY_LOOSE, loose_gateway_id);
peer_cfg->add_auth_cfg(peer_cfg, auth, FALSE);
child_cfg = child_cfg_create(priv->name, &child);
str = nm_setting_vpn_get_data_item(vpn, "esp");
if (proposal && str && strlen(str))
{
enumerator = enumerator_create_token(str, ";", "");
while (enumerator->enumerate(enumerator, &str))
{
prop = proposal_create_from_string(PROTO_ESP, str);
if (!prop)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_LAUNCH_FAILED,
"Invalid ESP proposal.");
enumerator->destroy(enumerator);
child_cfg->destroy(child_cfg);
peer_cfg->destroy(peer_cfg);
return FALSE;
}
child_cfg->add_proposal(child_cfg, prop);
}
enumerator->destroy(enumerator);
}
else
{
child_cfg->add_proposal(child_cfg, proposal_create_default_aead(PROTO_ESP));
child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
}
ts = traffic_selector_create_dynamic(0, 0, 65535);
child_cfg->add_traffic_selector(child_cfg, TRUE, ts);
str = nm_setting_vpn_get_data_item(vpn, "remote-ts");
if (str && strlen(str))
{
enumerator = enumerator_create_token(str, ";", "");
while (enumerator->enumerate(enumerator, &str))
{
ts = traffic_selector_create_from_cidr((char*)str, 0, 0, 65535);
if (!ts)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR,
NM_VPN_PLUGIN_ERROR_LAUNCH_FAILED,
"Invalid remote traffic selector.");
enumerator->destroy(enumerator);
child_cfg->destroy(child_cfg);
peer_cfg->destroy(peer_cfg);
return FALSE;
}
child_cfg->add_traffic_selector(child_cfg, FALSE, ts);
}
enumerator->destroy(enumerator);
}
else
{
ts = traffic_selector_create_from_cidr("0.0.0.0/0", 0, 0, 65535);
child_cfg->add_traffic_selector(child_cfg, FALSE, ts);
ts = traffic_selector_create_from_cidr("::/0", 0, 0, 65535);
child_cfg->add_traffic_selector(child_cfg, FALSE, ts);
}
peer_cfg->add_child_cfg(peer_cfg, child_cfg);
/**
* Prepare IKE_SA
*/
ike_sa = charon->ike_sa_manager->checkout_by_config(charon->ike_sa_manager,
peer_cfg);
peer_cfg->destroy(peer_cfg);
if (!ike_sa)
{
g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_LAUNCH_FAILED,
"IKE version not supported.");
return FALSE;
}
/**
* Register listener, enable initiate-failure-detection hooks
*/
priv->ike_sa = ike_sa;
priv->listener.ike_state_change = _ike_state_change;
priv->listener.child_state_change = _child_state_change;
/**
* Initiate
*/
child_cfg->get_ref(child_cfg);
if (ike_sa->initiate(ike_sa, child_cfg, 0, NULL, NULL) != SUCCESS)
{
charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, ike_sa);
g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_LAUNCH_FAILED,
"Initiating failed.");
return FALSE;
}
charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
return TRUE;
}
/**
* NeedSecrets called from NM via DBUS
*/
static gboolean need_secrets(NMVpnServicePlugin *plugin, NMConnection *connection,
const char **setting_name, GError **error)
{
NMSettingVpn *settings;
const char *method, *cert_source, *path;
bool need_secret = FALSE;
settings = NM_SETTING_VPN(nm_connection_get_setting(connection,
NM_TYPE_SETTING_VPN));
method = nm_setting_vpn_get_data_item(settings, "method");
if (method)
{
if (streq(method, "cert") ||
streq(method, "eap-tls") ||
streq(method, "key") ||
streq(method, "agent") ||
streq(method, "smartcard"))
{
cert_source = nm_setting_vpn_get_data_item(settings, "cert-source");
if (!cert_source)
{
cert_source = method;
}
if (streq(cert_source, "agent"))
{
need_secret = !nm_setting_vpn_get_secret(settings, "agent");
}
else if (streq(cert_source, "smartcard"))
{
need_secret = !nm_setting_vpn_get_secret(settings, "password");
}
else
{
need_secret = TRUE;
path = nm_setting_vpn_get_data_item(settings, "userkey");
if (path)
{
private_key_t *key;
/* try to load/decrypt the private key */
key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
KEY_ANY, BUILD_FROM_FILE, path, BUILD_END);
if (key)
{
key->destroy(key);
need_secret = FALSE;
}
else if (nm_setting_vpn_get_secret(settings, "password"))
{
need_secret = FALSE;
}
}
}
}
else if (streq(method, "eap") ||
streq(method, "psk"))
{
need_secret = !nm_setting_vpn_get_secret(settings, "password");
}
}
*setting_name = NM_SETTING_VPN_SETTING_NAME;
return need_secret;
}
/**
* The actual disconnection
*/
static gboolean do_disconnect(gpointer plugin)
{
NMStrongswanPluginPrivate *priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
enumerator_t *enumerator;
ike_sa_t *ike_sa;
u_int id;
/* our ike_sa pointer might be invalid, lookup sa */
enumerator = charon->controller->create_ike_sa_enumerator(
charon->controller, TRUE);
while (enumerator->enumerate(enumerator, &ike_sa))
{
if (priv->ike_sa == ike_sa)
{
id = ike_sa->get_unique_id(ike_sa);
enumerator->destroy(enumerator);
charon->controller->terminate_ike(charon->controller, id, FALSE,
controller_cb_empty, NULL, 0);
/* clear secrets as we are asked for new secrets (where we'd find
* the cached secrets from earlier connections) before we clear
* them in connect() */
priv->creds->clear(priv->creds);
return FALSE;
}
}
enumerator->destroy(enumerator);
g_debug("Connection not found.");
return FALSE;
}
/**
* Disconnect called from NM via DBUS
*/
static gboolean disconnect(NMVpnServicePlugin *plugin, GError **err)
{
/* enqueue the actual disconnection, because we may be called in
* response to a listener_t callback and the SA enumeration would
* possibly deadlock. */
g_idle_add(do_disconnect, plugin);
return TRUE;
}
/**
* Initializer
*/
static void nm_strongswan_plugin_init(NMStrongswanPlugin *plugin)
{
NMStrongswanPluginPrivate *priv;
priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
priv->plugin = NM_VPN_SERVICE_PLUGIN(plugin);
memset(&priv->listener, 0, sizeof(listener_t));
priv->listener.child_updown = _child_updown;
priv->listener.ike_rekey = _ike_rekey;
priv->listener.ike_reestablish_pre = _ike_reestablish_pre;
priv->listener.ike_reestablish_post = _ike_reestablish_post;
charon->bus->add_listener(charon->bus, &priv->listener);
priv->tun = tun_device_create(NULL);
priv->name = NULL;
}
/**
* Destructor
*/
static void nm_strongswan_plugin_dispose(GObject *obj)
{
NMStrongswanPlugin *plugin;
NMStrongswanPluginPrivate *priv;
plugin = NM_STRONGSWAN_PLUGIN(obj);
priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
if (priv->tun)
{
priv->tun->destroy(priv->tun);
priv->tun = NULL;
}
G_OBJECT_CLASS (nm_strongswan_plugin_parent_class)->dispose (obj);
}
/**
* Class constructor
*/
static void nm_strongswan_plugin_class_init(
NMStrongswanPluginClass *strongswan_class)
{
NMVpnServicePluginClass *parent_class = NM_VPN_SERVICE_PLUGIN_CLASS(strongswan_class);
parent_class->connect = connect_;
parent_class->need_secrets = need_secrets;
parent_class->disconnect = disconnect;
G_OBJECT_CLASS(strongswan_class)->dispose = nm_strongswan_plugin_dispose;
}
/**
* Object constructor
*/
NMStrongswanPlugin *nm_strongswan_plugin_new(nm_creds_t *creds,
nm_handler_t *handler)
{
GError *error = NULL;
NMStrongswanPlugin *plugin = (NMStrongswanPlugin *)g_initable_new (
NM_TYPE_STRONGSWAN_PLUGIN,
NULL,
&error,
NM_VPN_SERVICE_PLUGIN_DBUS_SERVICE_NAME, NM_DBUS_SERVICE_STRONGSWAN,
NULL);
if (plugin)
{
NMStrongswanPluginPrivate *priv;
/* the rest of the initialization happened in _init above */
priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
priv->creds = creds;
priv->handler = handler;
}
else
{
g_warning ("Failed to initialize a plugin instance: %s", error->message);
g_error_free (error);
}
return plugin;
}
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