11 files changed, 1387 insertions, 0 deletions

diff --git a/src/libcharon/plugins/uci/Makefile.am b/src/libcharon/plugins/uci/Makefile.am
new file mode 100644
index 000000000..ccaecc6bc
--- /dev/null
+++ b/src/libcharon/plugins/uci/Makefile.am
@@ -0,0 +1,18 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/charon
+
+AM_CFLAGS = -rdynamic
+
+if MONOLITHIC
+noinst_LTLIBRARIES = libstrongswan-uci.la
+else
+plugin_LTLIBRARIES = libstrongswan-uci.la
+endif
+
+libstrongswan_uci_la_SOURCES = \
+	uci_plugin.h uci_plugin.c uci_parser.h uci_parser.c \
+	uci_config.h uci_config.c uci_creds.h uci_creds.c \
+	uci_control.h uci_control.c
+
+libstrongswan_uci_la_LDFLAGS = -module -avoid-version
+libstrongswan_uci_la_LIBADD  = -luci
diff --git a/src/libcharon/plugins/uci/uci_config.c b/src/libcharon/plugins/uci/uci_config.c
new file mode 100644
index 000000000..bd58afbf0
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_config.c
@@ -0,0 +1,361 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * Copyright (C) 2008 Tobias Brunner
+ * Copyright (C) 2008 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.
+ */
+
+#define _GNU_SOURCE
+#include <string.h>
+
+#include "uci_config.h"
+#include "uci_parser.h"
+
+#include <daemon.h>
+
+typedef struct private_uci_config_t private_uci_config_t;
+
+/**
+ * Private data of an uci_config_t object
+ */
+struct private_uci_config_t {
+
+	/**
+	 * Public part
+	 */
+	uci_config_t public;
+
+	/**
+	 * UCI parser context
+	 */
+	uci_parser_t *parser;
+};
+
+/**
+ * enumerator implementation for create_peer_cfg_enumerator
+ */
+typedef struct {
+	/** implements enumerator */
+	enumerator_t public;
+	/** currently enumerated peer config */
+	peer_cfg_t *peer_cfg;
+	/** inner uci_parser section enumerator */
+	enumerator_t *inner;
+} peer_enumerator_t;
+
+/**
+ * create a proposal from a string, with fallback to default
+ */
+static proposal_t *create_proposal(char *string, protocol_id_t proto)
+{
+	proposal_t *proposal = NULL;
+
+	if (string)
+	{
+		proposal = proposal_create_from_string(proto, string);
+	}
+	if (!proposal)
+	{	/* UCI default is aes/sha1 only */
+		if (proto == PROTO_IKE)
+		{
+			proposal = proposal_create_from_string(proto,
+								"aes128-aes192-aes256-sha1-modp1536-modp2048");
+		}
+		else
+		{
+			proposal = proposal_create_from_string(proto,
+								"aes128-aes192-aes256-sha1");
+		}
+	}
+	return proposal;
+}
+
+/**
+ * create an traffic selector, fallback to dynamic
+ */
+static traffic_selector_t *create_ts(char *string)
+{
+	if (string)
+	{
+		int netbits = 32;
+		host_t *net;
+		char *pos;
+
+		string = strdupa(string);
+		pos = strchr(string, '/');
+		if (pos)
+		{
+			*pos++ = '\0';
+			netbits = atoi(pos);
+		}
+		else
+		{
+			if (strchr(string, ':'))
+			{
+				netbits = 128;
+			}
+		}
+		net = host_create_from_string(string, 0);
+		if (net)
+		{
+			return traffic_selector_create_from_subnet(net, netbits, 0, 0);
+		}
+	}
+	return traffic_selector_create_dynamic(0, 0, 65535);
+}
+
+/**
+ * create a rekey time from a string with hours, with fallback
+ */
+static u_int create_rekey(char *string)
+{
+	u_int rekey = 0;
+
+	if (string)
+	{
+		rekey = atoi(string);
+		if (rekey)
+		{
+			return rekey * 3600;
+		}
+	}
+	/* every 12 hours */
+	return 12 * 3600;
+}
+
+/**
+ * Implementation of peer_enumerator_t.public.enumerate
+ */
+static bool peer_enumerator_enumerate(peer_enumerator_t *this, peer_cfg_t **cfg)
+{
+	char *name, *ike_proposal, *esp_proposal, *ike_rekey, *esp_rekey;
+	char *local_id, *local_addr, *local_net;
+	char *remote_id, *remote_addr, *remote_net;
+	child_cfg_t *child_cfg;
+	ike_cfg_t *ike_cfg;
+	auth_cfg_t *auth;
+	lifetime_cfg_t lifetime = {
+		.time = {
+			.life = create_rekey(esp_rekey) + 300,
+			.rekey = create_rekey(esp_rekey),
+			.jitter = 300
+		}
+	};
+
+	/* defaults */
+	name = "unnamed";
+	local_id = NULL;
+	remote_id = NULL;
+	local_addr = "0.0.0.0";
+	remote_addr = "0.0.0.0";
+	local_net = NULL;
+	remote_net = NULL;
+	ike_proposal = NULL;
+	esp_proposal = NULL;
+	ike_rekey = NULL;
+	esp_rekey = NULL;
+
+	if (this->inner->enumerate(this->inner, &name, &local_id, &remote_id,
+			&local_addr, &remote_addr, &local_net, &remote_net,
+			&ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
+	{
+		DESTROY_IF(this->peer_cfg);
+		ike_cfg = ike_cfg_create(FALSE, FALSE,
+					local_addr, IKEV2_UDP_PORT, remote_addr, IKEV2_UDP_PORT);
+		ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
+		this->peer_cfg = peer_cfg_create(
+					name, 2, ike_cfg, CERT_SEND_IF_ASKED, UNIQUE_NO,
+					1, create_rekey(ike_rekey), 0,  /* keytries, rekey, reauth */
+					1800, 900,						/* jitter, overtime */
+					TRUE, 60, 						/* mobike, dpddelay */
+					NULL, NULL, 					/* vip, pool */
+					FALSE, NULL, NULL); 			/* mediation, med by, peer id */
+		auth = auth_cfg_create();
+		auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
+		auth->add(auth, AUTH_RULE_IDENTITY,
+				  identification_create_from_string(local_id));
+		this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, TRUE);
+
+		auth = auth_cfg_create();
+		auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
+		if (remote_id)
+		{
+			auth->add(auth, AUTH_RULE_IDENTITY,
+					  identification_create_from_string(remote_id));
+		}
+		this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, FALSE);
+
+		child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
+									 ACTION_NONE, ACTION_NONE, FALSE, 0);
+		child_cfg->add_proposal(child_cfg, create_proposal(esp_proposal, PROTO_ESP));
+		child_cfg->add_traffic_selector(child_cfg, TRUE, create_ts(local_net));
+		child_cfg->add_traffic_selector(child_cfg, FALSE, create_ts(remote_net));
+		this->peer_cfg->add_child_cfg(this->peer_cfg, child_cfg);
+		*cfg = this->peer_cfg;
+		return TRUE;
+	}
+	return FALSE;
+}
+
+/**
+ * Implementation of peer_enumerator_t.public.destroy
+ */
+static void peer_enumerator_destroy(peer_enumerator_t *this)
+{
+	DESTROY_IF(this->peer_cfg);
+	this->inner->destroy(this->inner);
+	free(this);
+}
+
+/**
+ * Implementation of backend_t.create_peer_cfg_enumerator.
+ */
+static enumerator_t* create_peer_cfg_enumerator(private_uci_config_t *this,
+												identification_t *me,
+												identification_t *other)
+{
+	peer_enumerator_t *e = malloc_thing(peer_enumerator_t);
+
+	e->public.enumerate = (void*)peer_enumerator_enumerate;
+	e->public.destroy = (void*)peer_enumerator_destroy;
+	e->peer_cfg = NULL;
+	e->inner = this->parser->create_section_enumerator(this->parser,
+					"local_id", "remote_id", "local_addr", "remote_addr",
+					"local_net", "remote_net", "ike_proposal", "esp_proposal",
+					"ike_rekey", "esp_rekey", NULL);
+	if (!e->inner)
+	{
+		free(e);
+		return NULL;
+	}
+	return &e->public;
+}
+
+/**
+ * enumerator implementation for create_ike_cfg_enumerator
+ */
+typedef struct {
+	/** implements enumerator */
+	enumerator_t public;
+	/** currently enumerated ike config */
+	ike_cfg_t *ike_cfg;
+	/** inner uci_parser section enumerator */
+	enumerator_t *inner;
+} ike_enumerator_t;
+
+/**
+ * Implementation of peer_enumerator_t.public.enumerate
+ */
+static bool ike_enumerator_enumerate(ike_enumerator_t *this, ike_cfg_t **cfg)
+{
+	char *local_addr, *remote_addr, *ike_proposal;
+
+	/* defaults */
+	local_addr = "0.0.0.0";
+	remote_addr = "0.0.0.0";
+	ike_proposal = NULL;
+
+	if (this->inner->enumerate(this->inner, NULL,
+							   &local_addr, &remote_addr, &ike_proposal))
+	{
+		DESTROY_IF(this->ike_cfg);
+		this->ike_cfg = ike_cfg_create(FALSE, FALSE, local_addr, IKEV2_UDP_PORT,
+										remote_addr, IKEV2_UDP_PORT);
+		this->ike_cfg->add_proposal(this->ike_cfg,
+									create_proposal(ike_proposal, PROTO_IKE));
+
+		*cfg = this->ike_cfg;
+		return TRUE;
+	}
+	return FALSE;
+}
+
+/**
+ * Implementation of ike_enumerator_t.public.destroy
+ */
+static void ike_enumerator_destroy(ike_enumerator_t *this)
+{
+	DESTROY_IF(this->ike_cfg);
+	this->inner->destroy(this->inner);
+	free(this);
+}
+
+/**
+ * Implementation of backend_t.create_ike_cfg_enumerator.
+ */
+static enumerator_t* create_ike_cfg_enumerator(private_uci_config_t *this,
+											   host_t *me, host_t *other)
+{
+	ike_enumerator_t *e = malloc_thing(ike_enumerator_t);
+
+	e->public.enumerate = (void*)ike_enumerator_enumerate;
+	e->public.destroy = (void*)ike_enumerator_destroy;
+	e->ike_cfg = NULL;
+	e->inner = this->parser->create_section_enumerator(this->parser,
+							"local_addr", "remote_addr", "ike_proposal", NULL);
+	if (!e->inner)
+	{
+		free(e);
+		return NULL;
+	}
+	return &e->public;
+}
+
+/**
+ * implements backend_t.get_peer_cfg_by_name.
+ */
+static peer_cfg_t *get_peer_cfg_by_name(private_uci_config_t *this, char *name)
+{
+	enumerator_t *enumerator;
+	peer_cfg_t *current, *found = NULL;
+
+	enumerator = create_peer_cfg_enumerator(this, NULL, NULL);
+	if (enumerator)
+	{
+		while (enumerator->enumerate(enumerator, &current))
+		{
+			if (streq(name, current->get_name(current)))
+			{
+				found = current->get_ref(current);
+				break;
+			}
+		}
+		enumerator->destroy(enumerator);
+	}
+	return found;
+}
+
+/**
+ * Implementation of uci_config_t.destroy.
+ */
+static void destroy(private_uci_config_t *this)
+{
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+uci_config_t *uci_config_create(uci_parser_t *parser)
+{
+	private_uci_config_t *this = malloc_thing(private_uci_config_t);
+
+	this->public.backend.create_peer_cfg_enumerator = (enumerator_t*(*)(backend_t*, identification_t *me, identification_t *other))create_peer_cfg_enumerator;
+	this->public.backend.create_ike_cfg_enumerator = (enumerator_t*(*)(backend_t*, host_t *me, host_t *other))create_ike_cfg_enumerator;
+	this->public.backend.get_peer_cfg_by_name = (peer_cfg_t* (*)(backend_t*,char*))get_peer_cfg_by_name;
+	this->public.destroy = (void(*)(uci_config_t*))destroy;
+	this->parser = parser;
+
+	return &this->public;
+}
+
diff --git a/src/libcharon/plugins/uci/uci_config.h b/src/libcharon/plugins/uci/uci_config.h
new file mode 100644
index 000000000..130f15d85
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_config.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008 Thomas Kallenberg
+ * 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.
+ */
+
+/**
+ * @defgroup uci_config_t uci_config
+ * @{ @ingroup uci
+ */
+
+#ifndef UCI_CONFIG_H_
+#define UCI_CONFIG_H_
+
+#include "uci_parser.h"
+
+#include <config/backend.h>
+
+typedef struct uci_config_t uci_config_t;
+
+/**
+ * OpenWRT UCI configuration backend.
+ */
+struct uci_config_t {
+
+	/**
+	 * Implements backend_t interface
+	 */
+	backend_t backend;
+
+	/**
+	 * Destroy the backend.
+	 */
+	void (*destroy)(uci_config_t *this);
+};
+
+/**
+ * Create a UCI based configuration backend.
+ *
+ * @param parser	UCI parser to use
+ * @return			configuration backend
+ */
+uci_config_t *uci_config_create(uci_parser_t *parser);
+
+#endif /** UCI_CONFIG_H_ @}*/
diff --git a/src/libcharon/plugins/uci/uci_control.c b/src/libcharon/plugins/uci/uci_control.c
new file mode 100644
index 000000000..3c4928be4
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_control.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * Copyright (C) 2008 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.
+ */
+
+#define _GNU_SOURCE
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include "uci_control.h"
+
+#include <daemon.h>
+#include <threading/thread.h>
+#include <processing/jobs/callback_job.h>
+
+#define FIFO_FILE "/var/run/charon.fifo"
+
+
+typedef struct private_uci_control_t private_uci_control_t;
+
+/**
+ * private data of uci_control_t
+ */
+struct private_uci_control_t {
+
+	/**
+	 * Public part
+	 */
+	uci_control_t public;
+
+	/**
+	 * Job
+	 */
+	callback_job_t *job;
+};
+
+/**
+ * write answer to fifo
+ */
+static void write_fifo(private_uci_control_t *this, char *format, ...)
+{
+	va_list args;
+	FILE *out;
+
+	out = fopen(FIFO_FILE, "w");
+	if (out)
+	{
+		va_start(args, format);
+		vfprintf(out, format, args);
+		va_end(args);
+		fclose(out);
+	}
+	else
+	{
+		DBG1(DBG_CFG, "writing to UCI fifo failed: %s", strerror(errno));
+	}
+}
+
+/**
+ * print IKE_SA status information
+ */
+static void status(private_uci_control_t *this, char *name)
+{
+	enumerator_t *configs, *sas;
+	iterator_t *children;
+	ike_sa_t *ike_sa;
+	child_sa_t *child_sa;
+	peer_cfg_t *peer_cfg;
+	char buf[2048];
+	FILE *out = NULL;
+
+	configs = charon->backends->create_peer_cfg_enumerator(charon->backends,
+														NULL, NULL, NULL, NULL);
+	while (configs->enumerate(configs, &peer_cfg))
+	{
+		if (name && !streq(name, peer_cfg->get_name(peer_cfg)))
+		{
+			continue;
+		}
+		sas = charon->controller->create_ike_sa_enumerator(charon->controller);
+		while (sas->enumerate(sas, &ike_sa))
+		{
+			if (!streq(ike_sa->get_name(ike_sa), peer_cfg->get_name(peer_cfg)))
+			{
+				continue;
+			}
+			if (!out)
+			{
+				out = fmemopen(buf, sizeof(buf), "w");
+				if (!out)
+				{
+					continue;
+				}
+			}
+			fprintf(out, "%-8s %-20D %-16H ", ike_sa->get_name(ike_sa),
+				ike_sa->get_other_id(ike_sa), ike_sa->get_other_host(ike_sa));
+
+			children = ike_sa->create_child_sa_iterator(ike_sa);
+			while (children->iterate(children, (void**)&child_sa))
+			{
+				fprintf(out, "%#R",
+						child_sa->get_traffic_selectors(child_sa, FALSE));
+			}
+			children->destroy(children);
+			fprintf(out, "\n");
+		}
+		sas->destroy(sas);
+	}
+	configs->destroy(configs);
+	if (out)
+	{
+		fclose(out);
+		write_fifo(this, "%s", buf);
+	}
+	else
+	{
+		write_fifo(this, "");
+	}
+}
+
+/**
+ * Initiate an IKE_SA
+ */
+static void initiate(private_uci_control_t *this, char *name)
+{
+	peer_cfg_t *peer_cfg;
+	child_cfg_t *child_cfg;
+	enumerator_t *enumerator;
+
+	peer_cfg = charon->backends->get_peer_cfg_by_name(charon->backends, name);
+	if (peer_cfg)
+	{
+		enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
+		if (enumerator->enumerate(enumerator, &child_cfg) &&
+			charon->controller->initiate(charon->controller, peer_cfg,
+										 child_cfg->get_ref(child_cfg),
+										 controller_cb_empty, NULL) == SUCCESS)
+		{
+			write_fifo(this, "connection '%s' established\n", name);
+		}
+		else
+		{
+			write_fifo(this, "establishing connection '%s' failed\n", name);
+		}
+		enumerator->destroy(enumerator);
+	}
+	else
+	{
+		write_fifo(this, "no connection named '%s' found\n", name);
+	}
+}
+
+/**
+ * terminate an IKE_SA
+ */
+static void terminate(private_uci_control_t *this, char *name)
+{
+	enumerator_t *enumerator;
+	ike_sa_t *ike_sa;
+	u_int id;
+
+	enumerator = charon->controller->create_ike_sa_enumerator(charon->controller);
+	while (enumerator->enumerate(enumerator, &ike_sa))
+	{
+		if (streq(name, ike_sa->get_name(ike_sa)))
+		{
+			id = ike_sa->get_unique_id(ike_sa);
+			enumerator->destroy(enumerator);
+			charon->controller->terminate_ike(charon->controller, id,
+											  controller_cb_empty, NULL);
+			write_fifo(this, "connection '%s' terminated\n", name);
+			return;
+		}
+	}
+	enumerator->destroy(enumerator);
+	write_fifo(this, "no active connection named '%s'\n", name);
+}
+
+/**
+ * dispatch control request
+ */
+static void process(private_uci_control_t *this, char *message)
+{
+	enumerator_t* enumerator;
+
+	enumerator = enumerator_create_token(message, " \n", "");
+	if (enumerator->enumerate(enumerator, &message))
+	{
+		if (streq(message, "status"))
+		{
+			if (enumerator->enumerate(enumerator, &message))
+			{
+				status(this, message);
+			}
+			else
+			{
+				status(this, NULL);
+			}
+		}
+		else if (streq(message, "up") &&
+				 enumerator->enumerate(enumerator, &message))
+		{
+			initiate(this, message);
+		}
+		else if (streq(message, "down") &&
+				 enumerator->enumerate(enumerator, &message))
+		{
+			terminate(this, message);
+		}
+		else
+		{
+			write_fifo(this, "usage: status [<name>] | up <name> | down <name>\n"
+					   "  status format: name peer-id peer-addr tunnel(s)\n");
+		}
+	}
+	enumerator->destroy(enumerator);
+}
+
+/**
+ * read from fifo
+ */
+static job_requeue_t receive(private_uci_control_t *this)
+{
+	char message[128];
+	int len;
+	bool oldstate;
+	FILE *in;
+
+	memset(message, 0, sizeof(message));
+	oldstate = thread_cancelability(TRUE);
+	in = fopen(FIFO_FILE, "r");
+	thread_cancelability(oldstate);
+	if (in)
+	{
+		len = fread(message, 1, sizeof(message) - 1, in);
+		fclose(in);
+		if (len > 0)
+		{
+			process(this, message);
+		}
+		else
+		{
+			DBG1(DBG_DMN, "reading from UCI fifo failed: %s", strerror(errno));
+		}
+	}
+	else
+	{
+		DBG1(DBG_DMN, "opening UCI fifo failed: %s", strerror(errno));
+	}
+	return JOB_REQUEUE_FAIR;
+}
+
+/**
+ * Implementation of uci_control_t.destroy
+ */
+static void destroy(private_uci_control_t *this)
+{
+	this->job->cancel(this->job);
+	unlink(FIFO_FILE);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+uci_control_t *uci_control_create()
+{
+	private_uci_control_t *this = malloc_thing(private_uci_control_t);
+
+	this->public.destroy = (void(*)(uci_control_t*))destroy;
+
+	unlink(FIFO_FILE);
+	if (mkfifo(FIFO_FILE, S_IRUSR|S_IWUSR) != 0)
+	{
+		DBG1(DBG_CFG, "creating UCI control fifo '%s' failed: %s",
+			 FIFO_FILE, strerror(errno));
+	}
+	else
+	{
+		this->job = callback_job_create((callback_job_cb_t)receive,
+										this, NULL, NULL);
+		charon->processor->queue_job(charon->processor, (job_t*)this->job);
+	}
+	return &this->public;
+}
+
diff --git a/src/libcharon/plugins/uci/uci_control.h b/src/libcharon/plugins/uci/uci_control.h
new file mode 100644
index 000000000..794220aa1
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_control.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * 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.
+ */
+
+/**
+ * @defgroup uci_control_t uci_control
+ * @{ @ingroup uci
+ */
+
+#ifndef UCI_CONTROL_H_
+#define UCI_CONTROL_H_
+
+typedef struct uci_control_t uci_control_t;
+
+/**
+ * UCI control interface, uses a simple FIFO file
+ */
+struct uci_control_t {
+
+	/**
+	 * Destroy the controller
+	 */
+	void (*destroy)(uci_control_t *this);
+};
+
+/**
+ * Create a UCI based configuration backend.
+ */
+uci_control_t *uci_control_create();
+
+#endif /** UCI_CONTROL_H_ @}*/
diff --git a/src/libcharon/plugins/uci/uci_creds.c b/src/libcharon/plugins/uci/uci_creds.c
new file mode 100644
index 000000000..4d664feb2
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_creds.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008 Tobias Brunner
+ * 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 "uci_creds.h"
+
+#include <daemon.h>
+#include <credentials/keys/shared_key.h>
+#include <utils/identification.h>
+
+typedef struct private_uci_creds_t private_uci_creds_t;
+
+/**
+ * Private data of an uci_creds_t object
+ */
+struct private_uci_creds_t {
+	/**
+	 * Public part
+	 */
+	uci_creds_t public;
+
+	/**
+	 * UCI parser context
+	 */
+	uci_parser_t *parser;
+};
+
+typedef struct {
+	/** implements enumerator */
+	enumerator_t public;
+	/** inneer UCI enumerator */
+	enumerator_t *inner;
+	/** currently enumerated shared shared */
+	shared_key_t *current;
+	/** local ID to match */
+	identification_t *me;
+	/** remote ID to match */
+	identification_t *other;
+} shared_enumerator_t;
+
+/**
+ * Implementation of shared_enumerator_t.public.enumerate
+ */
+static bool shared_enumerator_enumerate(shared_enumerator_t *this,
+						shared_key_t **key, id_match_t *me, id_match_t *other)
+{
+	char *local_id, *remote_id, *psk;
+	identification_t *local, *remote;
+
+	while (TRUE)
+	{
+		/* defaults */
+		local_id = "%any";
+		remote_id = "%any";
+		psk = NULL;
+
+		if (!this->inner->enumerate(this->inner, NULL,
+									&local_id, &remote_id, &psk))
+		{
+			return FALSE;
+		}
+		if (psk == NULL)
+		{
+			continue;
+		}
+		if (me)
+		{
+			local = identification_create_from_string(local_id);
+			*me = this->me ? this->me->matches(this->me, local)
+						   : ID_MATCH_ANY;
+			local->destroy(local);
+			if (!*me)
+			{
+				continue;
+			}
+		}
+		if (other)
+		{
+			remote = identification_create_from_string(remote_id);
+			*other = this->other ? this->other->matches(this->other, remote)
+								 : ID_MATCH_ANY;
+			remote->destroy(remote);
+			if (!*other)
+			{
+				continue;
+			}
+		}
+		break;
+	}
+	DESTROY_IF(this->current);
+	this->current = shared_key_create(SHARED_IKE,
+								chunk_clone(chunk_create(psk, strlen(psk))));
+	*key = this->current;
+	return TRUE;
+}
+
+/**
+ * Implementation of shared_enumerator_t.public.destroy
+ */
+static void shared_enumerator_destroy(shared_enumerator_t *this)
+{
+	this->inner->destroy(this->inner);
+	DESTROY_IF(this->current);
+	free(this);
+}
+
+/**
+ * Implementation of backend_t.create_shared_cfg_enumerator.
+ */
+static enumerator_t* create_shared_enumerator(private_uci_creds_t *this,
+											  shared_key_type_t type,
+											  identification_t *me,
+											  identification_t *other)
+{
+	shared_enumerator_t *e;
+
+	if (type != SHARED_IKE)
+	{
+		return NULL;
+	}
+
+	e = malloc_thing(shared_enumerator_t);
+	e->current = NULL;
+	e->public.enumerate = (void*)shared_enumerator_enumerate;
+	e->public.destroy = (void*)shared_enumerator_destroy;
+	e->me = me;
+	e->other = other;
+	e->inner = this->parser->create_section_enumerator(this->parser,
+								"local_id", "remote_id", "psk", NULL);
+	if (!e->inner)
+	{
+		free(e);
+		return NULL;
+	}
+	return &e->public;
+}
+
+/**
+ * Implementation of uci_creds_t.destroy
+ */
+static void destroy(private_uci_creds_t *this)
+{
+	free(this);
+}
+
+uci_creds_t *uci_creds_create(uci_parser_t *parser)
+{
+	private_uci_creds_t *this = malloc_thing(private_uci_creds_t);
+
+	this->public.credential_set.create_shared_enumerator = (enumerator_t*(*)(credential_set_t*, shared_key_type_t, identification_t*, identification_t*))create_shared_enumerator;
+	this->public.credential_set.create_private_enumerator = (enumerator_t*(*) (credential_set_t*, key_type_t, identification_t*))return_null;
+	this->public.credential_set.create_cert_enumerator = (enumerator_t*(*) (credential_set_t*,	certificate_type_t, key_type_t,identification_t *, bool))return_null;
+	this->public.credential_set.create_cdp_enumerator  = (enumerator_t*(*) (credential_set_t *,certificate_type_t, identification_t *))return_null;
+	this->public.credential_set.cache_cert = (void (*)(credential_set_t *, certificate_t *))nop;
+	this->public.destroy = (void(*) (uci_creds_t*))destroy;
+
+	this->parser = parser;
+
+	return &this->public;
+}
+
diff --git a/src/libcharon/plugins/uci/uci_creds.h b/src/libcharon/plugins/uci/uci_creds.h
new file mode 100644
index 000000000..a283ed9f5
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_creds.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008 Thomas Kallenberg
+ * 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.
+ */
+
+/**
+ * @defgroup uci_creds_t uci_creds
+ * @{ @ingroup uci
+ */
+
+#ifndef UCI_CREDS_H_
+#define UCI_CREDS_H_
+
+#include "uci_parser.h"
+
+#include <credentials/credential_set.h>
+
+typedef struct uci_creds_t uci_creds_t;
+
+/**
+ * OpenWRT UCI credential set implementation.
+ */
+struct uci_creds_t {
+
+	/**
+	 * Implements credential set interface.
+	 */
+	credential_set_t credential_set;
+
+	/**
+	 * Destroy the backend.
+	 */
+	void (*destroy)(uci_creds_t *this);
+};
+
+/**
+ * Create a UCI based credential set.
+ *
+ * @param parser	UCI parser to use
+ * @return			credential set
+ */
+uci_creds_t *uci_creds_create(uci_parser_t *parser);
+
+#endif /** UCI_CREDS_H_ @}*/
diff --git a/src/libcharon/plugins/uci/uci_parser.c b/src/libcharon/plugins/uci/uci_parser.c
new file mode 100644
index 000000000..6de55d218
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_parser.c
@@ -0,0 +1,186 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008 Thomas Kallenberg
+ * 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 "uci_parser.h"
+
+#include <stdarg.h>
+
+#include <library.h>
+#include <uci.h>
+
+typedef struct private_uci_parser_t private_uci_parser_t;
+
+/**
+ * Private data of an uci_parser_t object
+ */
+struct private_uci_parser_t {
+
+	/**
+	 * Public part
+	 */
+	uci_parser_t public;
+
+	/**
+	 * UCI package name this parser reads
+	 */
+	char *package;
+};
+
+/**
+ * enumerator implementation create_section_enumerator
+ */
+typedef struct {
+	/** implements enumerator */
+	enumerator_t public;
+	/** currently enumerated uci section */
+	struct uci_element *current;
+	/** all uci ipsec config sections */
+	struct uci_list *list;
+	/** uci conntext */
+	struct uci_context *ctx;
+	/** ipsec uci package */
+	struct uci_package *package;
+	/** NULL terminated list of keywords */
+	char *keywords[];
+} section_enumerator_t;
+
+/**
+ * Implementation of section_enumerator_t.enumerate
+ */
+static bool section_enumerator_enumerate(section_enumerator_t *this, ...)
+{
+	struct uci_element *element;
+	char **value;
+	va_list args;
+	int i;
+
+	if (&this->current->list == this->list)
+	{
+		return FALSE;
+	}
+
+	va_start(args, this);
+
+	value = va_arg(args, char**);
+	if (value)
+	{
+		if (uci_lookup(this->ctx, &element, this->package,
+					   this->current->name, "name") == UCI_OK)
+		{	/* use "name" attribute as config name if available ... */
+			*value = uci_to_option(element)->value;
+		}
+		else
+		{	/* ... or the section name becomes config name */
+			*value = uci_to_section(this->current)->type;
+		}
+	}
+
+	/* followed by keyword parameters */
+	for (i = 0; this->keywords[i]; i++)
+	{
+		value = va_arg(args, char**);
+		if (value && uci_lookup(this->ctx, &element, this->package,
+						  this->current->name, this->keywords[i]) == UCI_OK)
+		{
+			*value = uci_to_option(element)->value;
+		}
+	}
+	va_end(args);
+
+	this->current = list_to_element(this->current->list.next);
+	return TRUE;
+}
+
+/**
+ * Implementation of section_enumerator_t.public.destroy
+ */
+static void section_enumerator_destroy(section_enumerator_t *this)
+{
+	uci_free_context(this->ctx);
+	free(this);
+}
+
+/**
+ * Implementation of backend_t.create_section_enumerator.
+ */
+static enumerator_t* create_section_enumerator(private_uci_parser_t *this, ...)
+{
+	section_enumerator_t *e;
+	va_list args;
+	int i;
+
+	/* allocate enumerator large enought to hold keyword pointers */
+	i = 1;
+	va_start(args, this);
+	while (va_arg(args, char*))
+	{
+		i++;
+	}
+	va_end(args);
+	e = malloc(sizeof(section_enumerator_t) + sizeof(char*) * i);
+	i = 0;
+	va_start(args, this);
+	do
+	{
+		e->keywords[i] = va_arg(args, char*);
+	}
+	while (e->keywords[i++]);
+	va_end(args);
+
+	e->public.enumerate = (void*)section_enumerator_enumerate;
+	e->public.destroy = (void*)section_enumerator_destroy;
+
+	/* load uci context */
+	e->ctx = uci_alloc_context();
+	if (uci_load(e->ctx, this->package, &e->package) != UCI_OK)
+	{
+		section_enumerator_destroy(e);
+		return NULL;
+	}
+	e->list = &e->package->sections;
+	e->current = list_to_element(e->list->next);
+	if (e->current->type != UCI_TYPE_SECTION)
+	{
+		section_enumerator_destroy(e);
+		return NULL;
+	}
+	return &e->public;
+}
+
+/**
+ * Implementation of uci_parser_t.destroy.
+ */
+static void destroy(private_uci_parser_t *this)
+{
+	free(this->package);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+uci_parser_t *uci_parser_create(char *package)
+{
+	private_uci_parser_t *this = malloc_thing(private_uci_parser_t);
+
+	this->public.create_section_enumerator = (enumerator_t*(*)(uci_parser_t*, ...))create_section_enumerator;
+	this->public.destroy = (void(*)(uci_parser_t*))destroy;
+
+	this->package = strdup(package);
+
+	return &this->public;
+}
+
diff --git a/src/libcharon/plugins/uci/uci_parser.h b/src/libcharon/plugins/uci/uci_parser.h
new file mode 100644
index 000000000..7217e507a
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_parser.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008 Thomas Kallenberg
+ * 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.
+ */
+
+/**
+ * @defgroup uci_parser_t uci_parser
+ * @{ @ingroup uci
+ */
+
+#ifndef UCI_PARSER_H_
+#define UCI_PARSER_H_
+
+#include <utils/enumerator.h>
+
+typedef struct uci_parser_t uci_parser_t;
+
+/**
+ * Wrapper to parse UCI sections with an enumerator.
+ */
+struct uci_parser_t {
+
+	/**
+	 * Create an enumerator over a section.
+	 *
+	 * The enumerator returns a section name followed by values for the keywords
+	 * specified in the variable argument list of this function.
+	 *
+	 * @param ...		variable argument list with keywords, NULL terminated
+	 * @return			enumerator over sections
+	 */
+	enumerator_t* (*create_section_enumerator)(uci_parser_t *this, ...);
+
+	/**
+	 * Destroy the parser.
+	 */
+	void (*destroy)(uci_parser_t *this);
+};
+
+/**
+ * Create a UCI parser.
+ *
+ * @param package	UCI package this parser should read
+ * @return			parser context
+ */
+uci_parser_t *uci_parser_create(char *package);
+
+#endif /** UCI_PARSER_H_ @}*/
diff --git a/src/libcharon/plugins/uci/uci_plugin.c b/src/libcharon/plugins/uci/uci_plugin.c
new file mode 100644
index 000000000..742fcf4d0
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_plugin.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * 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 "uci_plugin.h"
+#include "uci_config.h"
+#include "uci_creds.h"
+#include "uci_control.h"
+
+#include <daemon.h>
+
+/**
+ * UCI package name to use for lookups
+ */
+#define UCI_PACKAGE "strongswan"
+
+typedef struct private_uci_plugin_t private_uci_plugin_t;
+
+/**
+ * private data of uci plugin
+ */
+struct private_uci_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	uci_plugin_t public;
+
+	/**
+	 * UCI configuration backend
+	 */
+	uci_config_t *config;
+
+	/**
+	 * UCI credential set implementation
+	 */
+	uci_creds_t *creds;
+
+	/**
+	 * UCI parser wrapper
+	 */
+	uci_parser_t *parser;
+
+	/**
+	 * UCI control interface
+	 */
+	uci_control_t *control;
+};
+
+/**
+ * Implementation of plugin_t.destroy
+ */
+static void destroy(private_uci_plugin_t *this)
+{
+	charon->backends->remove_backend(charon->backends, &this->config->backend);
+	charon->credentials->remove_set(charon->credentials, &this->creds->credential_set);
+	this->config->destroy(this->config);
+	this->creds->destroy(this->creds);
+	this->parser->destroy(this->parser);
+	this->control->destroy(this->control);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *uci_plugin_create()
+{
+	private_uci_plugin_t *this = malloc_thing(private_uci_plugin_t);
+
+	this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
+
+	this->parser = uci_parser_create(UCI_PACKAGE);
+	this->config = uci_config_create(this->parser);
+	this->creds = uci_creds_create(this->parser);
+	this->control = uci_control_create();
+	charon->backends->add_backend(charon->backends, &this->config->backend);
+	charon->credentials->add_set(charon->credentials, &this->creds->credential_set);
+
+	return &this->public.plugin;
+}
+
diff --git a/src/libcharon/plugins/uci/uci_plugin.h b/src/libcharon/plugins/uci/uci_plugin.h
new file mode 100644
index 000000000..980ab26fd
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_plugin.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * Copyright (C) 2008 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.
+ */
+
+/**
+ * @defgroup uci uci
+ * @ingroup cplugins
+ *
+ * @defgroup uci_plugin uci_plugin
+ * @{ @ingroup uci
+ */
+
+#ifndef UCI_PLUGIN_H_
+#define UCI_PLUGIN_H_
+
+#include <plugins/plugin.h>
+
+typedef struct uci_plugin_t uci_plugin_t;
+
+/**
+ * OpenWRT UCI (Unified Configuration Interface) configuration plugin.
+ */
+struct uci_plugin_t {
+
+	/**
+	 * implements plugin interface
+	 */
+	plugin_t plugin;
+};
+
+#endif /** UCI_PLUGIN_H_ @}*/