New upstream release.

1 files changed, 629 insertions, 0 deletions

diff --git a/src/libcharon/plugins/nm/nm_service.c b/src/libcharon/plugins/nm/nm_service.c
new file mode 100644
index 000000000..cdf7dc962
--- /dev/null
+++ b/src/libcharon/plugins/nm/nm_service.c
@@ -0,0 +1,629 @@
+/*
+ * Copyright (C) 2008-2009 Martin Willi
+ * 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-setting-vpn.h>
+#include <nm-setting-connection.h>
+#include "nm_service.h"
+
+#include <daemon.h>
+#include <utils/host.h>
+#include <utils/identification.h>
+#include <config/peer_cfg.h>
+#include <credentials/certificates/x509.h>
+
+#include <stdio.h>
+
+G_DEFINE_TYPE(NMStrongswanPlugin, nm_strongswan_plugin, NM_TYPE_VPN_PLUGIN)
+
+/**
+ * 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 */
+	NMVPNPlugin *plugin;
+	/* credentials to use for authentication */
+	nm_creds_t *creds;
+	/* attribute handler for DNS/NBNS server information */
+	nm_handler_t *handler;
+	/* name of the connection */
+	char *name;
+} NMStrongswanPluginPrivate;
+
+#define NM_STRONGSWAN_PLUGIN_GET_PRIVATE(o) \
+			(G_TYPE_INSTANCE_GET_PRIVATE ((o), \
+				NM_TYPE_STRONGSWAN_PLUGIN, NMStrongswanPluginPrivate))
+
+/**
+ * convert enumerated handler chunks to a UINT_ARRAY GValue
+ */
+static GValue* handler_to_val(nm_handler_t *handler,
+							 configuration_attribute_type_t type)
+{
+	GValue *val;
+	GArray *array;
+	enumerator_t *enumerator;
+	chunk_t chunk;
+
+	enumerator = handler->create_enumerator(handler, type);
+	array = g_array_new (FALSE, TRUE, sizeof (guint32));
+	while (enumerator->enumerate(enumerator, &chunk))
+	{
+		g_array_append_val (array, *(u_int32_t*)chunk.ptr);
+	}
+	enumerator->destroy(enumerator);
+	val = g_slice_new0 (GValue);
+	g_value_init (val, DBUS_TYPE_G_UINT_ARRAY);
+	g_value_set_boxed (val, array);
+
+	return val;
+}
+
+/**
+ * signal IPv4 config to NM, set connection as established
+ */
+static void signal_ipv4_config(NMVPNPlugin *plugin,
+							   ike_sa_t *ike_sa, child_sa_t *child_sa)
+{
+	GValue *val;
+	GHashTable *config;
+	host_t *me, *other;
+	nm_handler_t *handler;
+
+	config = g_hash_table_new(g_str_hash, g_str_equal);
+	me = ike_sa->get_my_host(ike_sa);
+	other = ike_sa->get_other_host(ike_sa);
+	handler = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin)->handler;
+
+	/* NM requires a tundev, but netkey does not use one. Passing an invalid
+	 * iface makes NM complain, but it accepts it without fiddling on eth0. */
+	val = g_slice_new0 (GValue);
+	g_value_init (val, G_TYPE_STRING);
+	g_value_set_string (val, "none");
+	g_hash_table_insert (config, NM_VPN_PLUGIN_IP4_CONFIG_TUNDEV, val);
+
+	val = g_slice_new0(GValue);
+	g_value_init(val, G_TYPE_UINT);
+	g_value_set_uint(val, *(u_int32_t*)me->get_address(me).ptr);
+	g_hash_table_insert(config, NM_VPN_PLUGIN_IP4_CONFIG_ADDRESS, val);
+
+	val = g_slice_new0(GValue);
+	g_value_init(val, G_TYPE_UINT);
+	g_value_set_uint(val, me->get_address(me).len * 8);
+	g_hash_table_insert(config, NM_VPN_PLUGIN_IP4_CONFIG_PREFIX, val);
+
+	val = handler_to_val(handler, INTERNAL_IP4_DNS);
+	g_hash_table_insert(config, NM_VPN_PLUGIN_IP4_CONFIG_DNS, val);
+
+	val = handler_to_val(handler, INTERNAL_IP4_NBNS);
+	g_hash_table_insert(config, NM_VPN_PLUGIN_IP4_CONFIG_NBNS, val);
+
+	handler->reset(handler);
+
+	nm_vpn_plugin_set_ip4_config(plugin, config);
+}
+
+/**
+ * signal failure to NM, connecting failed
+ */
+static void signal_failure(NMVPNPlugin *plugin, NMVPNPluginFailure failure)
+{
+	nm_handler_t *handler = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin)->handler;
+
+	handler->reset(handler);
+
+	/* TODO: NM does not handle this failure!? */
+	nm_vpn_plugin_failure(plugin, failure);
+	nm_vpn_plugin_set_state(plugin, NM_VPN_SERVICE_STATE_STOPPED);
+}
+
+/**
+ * Implementation of listener_t.ike_state_change
+ */
+static bool ike_state_change(listener_t *listener, ike_sa_t *ike_sa,
+							 ike_sa_state_t state)
+{
+	NMStrongswanPluginPrivate *private = (NMStrongswanPluginPrivate*)listener;
+
+	if (private->ike_sa == ike_sa && state == IKE_DESTROYING)
+	{
+		signal_failure(private->plugin, NM_VPN_PLUGIN_FAILURE_LOGIN_FAILED);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+/**
+ * Implementation of listener_t.child_state_change
+ */
+static bool child_state_change(listener_t *listener, ike_sa_t *ike_sa,
+							   child_sa_t *child_sa, child_sa_state_t state)
+{
+	NMStrongswanPluginPrivate *private = (NMStrongswanPluginPrivate*)listener;
+
+	if (private->ike_sa == ike_sa && state == CHILD_DESTROYING)
+	{
+		signal_failure(private->plugin, NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+/**
+ * Implementation of listener_t.child_updown
+ */
+static bool child_updown(listener_t *listener, ike_sa_t *ike_sa,
+						 child_sa_t *child_sa, bool up)
+{
+	NMStrongswanPluginPrivate *private = (NMStrongswanPluginPrivate*)listener;
+
+	if (private->ike_sa == ike_sa)
+	{
+		if (up)
+		{	/* disable initiate-failure-detection hooks */
+			private->listener.ike_state_change = NULL;
+			private->listener.child_state_change = NULL;
+			signal_ipv4_config(private->plugin, ike_sa, child_sa);
+		}
+		else
+		{
+			signal_failure(private->plugin, NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED);
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
+
+/**
+ * Implementation of listener_t.ike_rekey
+ */
+static bool ike_rekey(listener_t *listener, ike_sa_t *old, ike_sa_t *new)
+{
+	NMStrongswanPluginPrivate *private = (NMStrongswanPluginPrivate*)listener;
+
+	if (private->ike_sa == old)
+	{	/* follow a rekeyed IKE_SA */
+		private->ike_sa = new;
+	}
+	return TRUE;
+}
+
+/**
+ * Connect function called from NM via DBUS
+ */
+static gboolean connect_(NMVPNPlugin *plugin, NMConnection *connection,
+						 GError **err)
+{
+	NMStrongswanPluginPrivate *priv;
+	NMSettingConnection *conn;
+	NMSettingVPN *vpn;
+	identification_t *user = NULL, *gateway = NULL;
+	const char *address, *str;
+	bool virtual, encap, ipcomp;
+	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;
+	auth_class_t auth_class = AUTH_CLASS_EAP;
+	certificate_t *cert = NULL;
+	x509_t *x509;
+	bool agent = FALSE;
+	lifetime_cfg_t lifetime = {
+		.time = {
+			.life = 10800 /* 3h */,
+			.rekey = 10200 /* 2h50min */,
+			.jitter = 300 /* 5min */
+		}
+	};
+
+	/**
+	 * Read parameters
+	 */
+	priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
+	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)));
+	address = nm_setting_vpn_get_data_item(vpn, "address");
+	if (!address || !*address)
+	{
+		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, "virtual");
+	virtual = str && streq(str, "yes");
+	str = nm_setting_vpn_get_data_item(vpn, "encap");
+	encap = str && streq(str, "yes");
+	str = nm_setting_vpn_get_data_item(vpn, "ipcomp");
+	ipcomp = str && streq(str, "yes");
+	str = nm_setting_vpn_get_data_item(vpn, "method");
+	if (str)
+	{
+		if (streq(str, "psk"))
+		{
+			auth_class = AUTH_CLASS_PSK;
+		}
+		else if (streq(str, "agent"))
+		{
+			auth_class = AUTH_CLASS_PUBKEY;
+			agent = TRUE;
+		}
+		else if (streq(str, "key"))
+		{
+			auth_class = AUTH_CLASS_PUBKEY;
+		}
+	}
+
+	/**
+	 * 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);
+
+		x509 = (x509_t*)cert;
+		if (!(x509->get_flags(x509) & X509_CA))
+		{	/* For a gateway certificate, we use the cert subject as identity. */
+			gateway = cert->get_subject(cert);
+			gateway = gateway->clone(gateway);
+			DBG1(DBG_CFG, "using gateway certificate, identity '%Y'", gateway);
+		}
+	}
+	else
+	{
+		/* no certificate defined, fall back to system-wide CA certificates */
+		priv->creds->load_ca_dir(priv->creds, NM_CA_DIR);
+	}
+	if (!gateway)
+	{
+		/* If the user configured a CA certificate, we use the IP/DNS
+		 * of the gateway as its identity. This identity will be used for
+		 * certificate lookup and requires the configured IP/DNS to be
+		 * included in the gateway certificate. */
+		gateway = identification_create_from_string((char*)address);
+		DBG1(DBG_CFG, "using CA certificate, gateway identity '%Y'", gateway);
+	}
+
+	if (auth_class == AUTH_CLASS_EAP)
+	{
+		/* username/password authentication ... */
+		str = nm_setting_vpn_get_data_item(vpn, "user");
+		if (str)
+		{
+			user = identification_create_from_string((char*)str);
+			str = nm_setting_vpn_get_secret(vpn, "password");
+			priv->creds->set_username_password(priv->creds, user, (char*)str);
+		}
+	}
+
+	if (auth_class == AUTH_CLASS_PUBKEY)
+	{
+		/* ... or certificate/private key authenitcation */
+		str = nm_setting_vpn_get_data_item(vpn, "usercert");
+		if (str)
+		{
+			public_key_t *public;
+			private_key_t *private = NULL;
+
+			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.");
+				gateway->destroy(gateway);
+				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)
+			{
+				chunk_t secret;
+
+				secret.ptr = (char*)nm_setting_vpn_get_secret(vpn, "password");
+				if (secret.ptr)
+				{
+					secret.len = strlen(secret.ptr);
+				}
+				private = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
+								KEY_RSA, BUILD_FROM_FILE, str,
+								BUILD_PASSPHRASE, secret, BUILD_END);
+				if (!private)
+				{
+					g_set_error(err, NM_VPN_PLUGIN_ERROR,
+								NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
+								"Loading private key failed.");
+				}
+			}
+			if (private)
+			{
+				user = cert->get_subject(cert);
+				user = user->clone(user);
+				priv->creds->set_cert_and_key(priv->creds, cert, private);
+			}
+			else
+			{
+				DESTROY_IF(cert);
+				gateway->destroy(gateway);
+				return FALSE;
+			}
+		}
+	}
+
+	if (!user)
+	{
+		g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_BAD_ARGUMENTS,
+					"Configuration parameters missing.");
+		gateway->destroy(gateway);
+		return FALSE;
+	}
+
+	/**
+	 * Set up configurations
+	 */
+	ike_cfg = ike_cfg_create(TRUE, encap,
+					"0.0.0.0", IKEV2_UDP_PORT, (char*)address, IKEV2_UDP_PORT);
+	ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
+	peer_cfg = peer_cfg_create(priv->name, 2, ike_cfg,
+					CERT_SEND_IF_ASKED, UNIQUE_REPLACE, 1, /* keyingtries */
+					36000, 0, /* rekey 10h, reauth none */
+					600, 600, /* jitter, over 10min */
+					TRUE, 0, /* mobike, DPD */
+					virtual ? host_create_from_string("0.0.0.0", 0) : NULL,
+					NULL, FALSE, NULL, NULL); /* pool, mediation */
+	auth = auth_cfg_create();
+	auth->add(auth, AUTH_RULE_AUTH_CLASS, auth_class);
+	auth->add(auth, AUTH_RULE_IDENTITY, user);
+	peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
+	auth = auth_cfg_create();
+	auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
+	auth->add(auth, AUTH_RULE_IDENTITY, gateway);
+	peer_cfg->add_auth_cfg(peer_cfg, auth, FALSE);
+
+	child_cfg = child_cfg_create(priv->name, &lifetime,
+								 NULL, TRUE, MODE_TUNNEL, /* updown, hostaccess */
+								 ACTION_NONE, ACTION_NONE, ipcomp, 0);
+	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);
+	ts = traffic_selector_create_from_string(0, TS_IPV4_ADDR_RANGE,
+											 "0.0.0.0", 0,
+											 "255.255.255.255", 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);
+	if (!ike_sa->get_peer_cfg(ike_sa))
+	{
+		ike_sa->set_peer_cfg(ike_sa, peer_cfg);
+	}
+	peer_cfg->destroy(peer_cfg);
+
+	/**
+	 * 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;
+	charon->bus->add_listener(charon->bus, &priv->listener);
+
+	/**
+	 * Initiate
+	 */
+	if (ike_sa->initiate(ike_sa, child_cfg, 0, NULL, NULL) != SUCCESS)
+	{
+		charon->bus->remove_listener(charon->bus, &priv->listener);
+		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(NMVPNPlugin *plugin, NMConnection *connection,
+							 char **setting_name, GError **error)
+{
+	NMSettingVPN *settings;
+	const char *method, *path;
+
+	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, "eap"))
+		{
+			if (nm_setting_vpn_get_secret(settings, "password"))
+			{
+				return FALSE;
+			}
+		}
+		else if (streq(method, "agent"))
+		{
+			if (nm_setting_vpn_get_secret(settings, "agent"))
+			{
+				return FALSE;
+			}
+		}
+		else if (streq(method, "key"))
+		{
+			path = nm_setting_vpn_get_data_item(settings, "userkey");
+			if (path)
+			{
+				private_key_t *key;
+				chunk_t secret;
+
+				secret.ptr = (char*)nm_setting_vpn_get_secret(settings, "password");
+				if (secret.ptr)
+				{
+					secret.len = strlen(secret.ptr);
+				}
+				/* try to load/decrypt the private key */
+				key = lib->creds->create(lib->creds, CRED_PRIVATE_KEY,
+								KEY_RSA, BUILD_FROM_FILE, path,
+								BUILD_PASSPHRASE, secret, BUILD_END);
+				if (key)
+				{
+					key->destroy(key);
+					return FALSE;
+				}
+			}
+		}
+	}
+	*setting_name = NM_SETTING_VPN_SETTING_NAME;
+	return TRUE;
+}
+
+/**
+ * Disconnect called from NM via DBUS
+ */
+static gboolean disconnect(NMVPNPlugin *plugin, GError **err)
+{
+	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);
+	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,
+											  controller_cb_empty, NULL);
+			return TRUE;
+		}
+	}
+	enumerator->destroy(enumerator);
+
+	g_set_error(err, NM_VPN_PLUGIN_ERROR, NM_VPN_PLUGIN_ERROR_GENERAL,
+				"Connection not found.");
+	return FALSE;
+}
+
+/**
+ * Initializer
+ */
+static void nm_strongswan_plugin_init(NMStrongswanPlugin *plugin)
+{
+	NMStrongswanPluginPrivate *priv;
+
+	priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
+	priv->plugin = NM_VPN_PLUGIN(plugin);
+	memset(&priv->listener.log, 0, sizeof(listener_t));
+	priv->listener.child_updown = child_updown;
+	priv->listener.ike_rekey = ike_rekey;
+}
+
+/**
+ * Class constructor
+ */
+static void nm_strongswan_plugin_class_init(
+									NMStrongswanPluginClass *strongswan_class)
+{
+	NMVPNPluginClass *parent_class = NM_VPN_PLUGIN_CLASS(strongswan_class);
+
+	g_type_class_add_private(G_OBJECT_CLASS(strongswan_class),
+							 sizeof(NMStrongswanPluginPrivate));
+	parent_class->connect = connect_;
+	parent_class->need_secrets = need_secrets;
+	parent_class->disconnect = disconnect;
+}
+
+/**
+ * Object constructor
+ */
+NMStrongswanPlugin *nm_strongswan_plugin_new(nm_creds_t *creds,
+											 nm_handler_t *handler)
+{
+	NMStrongswanPlugin *plugin = (NMStrongswanPlugin *)g_object_new (
+					NM_TYPE_STRONGSWAN_PLUGIN,
+					NM_VPN_PLUGIN_DBUS_SERVICE_NAME, NM_DBUS_SERVICE_STRONGSWAN,
+					NULL);
+	if (plugin)
+	{
+		NMStrongswanPluginPrivate *priv;
+
+		priv = NM_STRONGSWAN_PLUGIN_GET_PRIVATE(plugin);
+		priv->creds = creds;
+		priv->handler = handler;
+		priv->name = NULL;
+	}
+	return plugin;
+}
+