src/libcharon/plugins/uci/uci_config.c - manifest_repos/strongswan - Git at Google

 /*
  * Copyright (C) 2008 Thomas Kallenberg
  * Copyright (C) 2008 Tobias Brunner
  * Copyright (C) 2008 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.
  */

 #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)
 	{
 		traffic_selector_t *ts;

 		ts = traffic_selector_create_from_cidr(string, 0, 0, 65535);
 		if (ts)
 		{
 			return ts;
 		}
 	}
 	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;
 }

 METHOD(enumerator_t, peer_enumerator_enumerate, bool,
 	peer_enumerator_t *this, va_list args)
 {
 	char *name, *ike_proposal, *esp_proposal, *ike_rekey, *esp_rekey;
 	char *local_id, *local_net, *remote_id, *remote_net;
 	peer_cfg_t **cfg;
 	child_cfg_t *child_cfg;
 	ike_cfg_t *ike_cfg;
 	auth_cfg_t *auth;
 	ike_cfg_create_t ike = {
 		.version = IKEV2,
 		.local = "0.0.0.0",
 		.local_port = charon->socket->get_port(charon->socket, FALSE),
 		.remote = "0.0.0.0",
 		.remote_port = IKEV2_UDP_PORT,
 		.no_certreq = TRUE,
 	};
 	peer_cfg_create_t peer = {
 		.cert_policy = CERT_SEND_IF_ASKED,
 		.unique = UNIQUE_NO,
 		.keyingtries = 1,
 		.jitter_time = 1800,
 		.over_time = 900,
 		.dpd = 60,
 	};
 	child_cfg_create_t child = {
 		.lifetime = {
 			.time = {
 				.life = create_rekey(esp_rekey) + 300,
 				.rekey = create_rekey(esp_rekey),
 				.jitter = 300
 			},
 		},
 		.mode = MODE_TUNNEL,
 	};

 	VA_ARGS_VGET(args, cfg);

 	/* defaults */
 	name = "unnamed";
 	local_id = NULL;
 	remote_id = NULL;
 	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,
 			&ike.local, &ike.remote, &local_net, &remote_net,
 			&ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
 	{

 		DESTROY_IF(this->peer_cfg);
 		ike_cfg = ike_cfg_create(&ike);
 		ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
 		peer.rekey_time = create_rekey(ike_rekey);
 		this->peer_cfg = peer_cfg_create(name, ike_cfg, &peer);
 		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, &child);
 		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;
 }


 METHOD(enumerator_t, peer_enumerator_destroy, void,
 	peer_enumerator_t *this)
 {
 	DESTROY_IF(this->peer_cfg);
 	this->inner->destroy(this->inner);
 	free(this);
 }

 METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
 	private_uci_config_t *this, identification_t *me, identification_t *other)
 {
 	peer_enumerator_t *e;

 	INIT(e,
 		.public = {
 			.enumerate = enumerator_enumerate_default,
 			.venumerate = _peer_enumerator_enumerate,
 			.destroy = _peer_enumerator_destroy,
 		},
 		.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;

 METHOD(enumerator_t, ike_enumerator_enumerate, bool,
 	ike_enumerator_t *this, va_list args)
 {
 	ike_cfg_t **cfg;
 	ike_cfg_create_t ike = {
 		.version = IKEV2,
 		.local = "0.0.0.0",
 		.local_port = charon->socket->get_port(charon->socket, FALSE),
 		.remote = "0.0.0.0",
 		.remote_port = IKEV2_UDP_PORT,
 		.no_certreq = TRUE,
 	};
 	char *ike_proposal;

 	VA_ARGS_VGET(args, cfg);

 	/* defaults */
 	ike_proposal = NULL;

 	if (this->inner->enumerate(this->inner, NULL,
 							   &ike.local, &ike.remote, &ike_proposal))
 	{
 		DESTROY_IF(this->ike_cfg);
 		this->ike_cfg = ike_cfg_create(&ike);
 		this->ike_cfg->add_proposal(this->ike_cfg,
 									create_proposal(ike_proposal, PROTO_IKE));

 		*cfg = this->ike_cfg;
 		return TRUE;
 	}
 	return FALSE;
 }

 METHOD(enumerator_t, ike_enumerator_destroy, void,
 	ike_enumerator_t *this)
 {
 	DESTROY_IF(this->ike_cfg);
 	this->inner->destroy(this->inner);
 	free(this);
 }

 METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
 	private_uci_config_t *this, host_t *me, host_t *other)
 {
 	ike_enumerator_t *e;

 	INIT(e,
 		.public = {
 			.enumerate = enumerator_enumerate_default,
 			.venumerate = _ike_enumerator_enumerate,
 			.destroy = _ike_enumerator_destroy,
 		},
 		.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;
 }

 METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
 	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;
 }

 METHOD(uci_config_t, destroy, void,
 	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;

 	INIT(this,
 		.public = {
 			.backend = {
 				.create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
 				.create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
 				.get_peer_cfg_by_name = _get_peer_cfg_by_name,
 			},
 			.destroy = _destroy,
 		},
 		.parser = parser,
 	);

 	return &this->public;
 }
	/*
	* Copyright (C) 2008 Thomas Kallenberg
	* Copyright (C) 2008 Tobias Brunner
	* Copyright (C) 2008 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.
	*/

	#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)
	{
	traffic_selector_t *ts;

	ts = traffic_selector_create_from_cidr(string, 0, 0, 65535);
	if (ts)
	{
	return ts;
	}
	}
	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;
	}

	METHOD(enumerator_t, peer_enumerator_enumerate, bool,
	peer_enumerator_t *this, va_list args)
	{
	char name, ike_proposal, esp_proposal, ike_rekey, *esp_rekey;
	char local_id, local_net, remote_id, remote_net;
	peer_cfg_t **cfg;
	child_cfg_t *child_cfg;
	ike_cfg_t *ike_cfg;
	auth_cfg_t *auth;
	ike_cfg_create_t ike = {
	.version = IKEV2,
	.local = "0.0.0.0",
	.local_port = charon->socket->get_port(charon->socket, FALSE),
	.remote = "0.0.0.0",
	.remote_port = IKEV2_UDP_PORT,
	.no_certreq = TRUE,
	};
	peer_cfg_create_t peer = {
	.cert_policy = CERT_SEND_IF_ASKED,
	.unique = UNIQUE_NO,
	.keyingtries = 1,
	.jitter_time = 1800,
	.over_time = 900,
	.dpd = 60,
	};
	child_cfg_create_t child = {
	.lifetime = {
	.time = {
	.life = create_rekey(esp_rekey) + 300,
	.rekey = create_rekey(esp_rekey),
	.jitter = 300
	},
	},
	.mode = MODE_TUNNEL,
	};

	VA_ARGS_VGET(args, cfg);

	/* defaults */
	name = "unnamed";
	local_id = NULL;
	remote_id = NULL;
	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,
	&ike.local, &ike.remote, &local_net, &remote_net,
	&ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
	{

	DESTROY_IF(this->peer_cfg);
	ike_cfg = ike_cfg_create(&ike);
	ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
	peer.rekey_time = create_rekey(ike_rekey);
	this->peer_cfg = peer_cfg_create(name, ike_cfg, &peer);
	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, &child);
	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;
	}


	METHOD(enumerator_t, peer_enumerator_destroy, void,
	peer_enumerator_t *this)
	{
	DESTROY_IF(this->peer_cfg);
	this->inner->destroy(this->inner);
	free(this);
	}

	METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
	private_uci_config_t this, identification_t me, identification_t *other)
	{
	peer_enumerator_t *e;

	INIT(e,
	.public = {
	.enumerate = enumerator_enumerate_default,
	.venumerate = _peer_enumerator_enumerate,
	.destroy = _peer_enumerator_destroy,
	},
	.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;

	METHOD(enumerator_t, ike_enumerator_enumerate, bool,
	ike_enumerator_t *this, va_list args)
	{
	ike_cfg_t **cfg;
	ike_cfg_create_t ike = {
	.version = IKEV2,
	.local = "0.0.0.0",
	.local_port = charon->socket->get_port(charon->socket, FALSE),
	.remote = "0.0.0.0",
	.remote_port = IKEV2_UDP_PORT,
	.no_certreq = TRUE,
	};
	char *ike_proposal;

	VA_ARGS_VGET(args, cfg);

	/* defaults */
	ike_proposal = NULL;

	if (this->inner->enumerate(this->inner, NULL,
	&ike.local, &ike.remote, &ike_proposal))
	{
	DESTROY_IF(this->ike_cfg);
	this->ike_cfg = ike_cfg_create(&ike);
	this->ike_cfg->add_proposal(this->ike_cfg,
	create_proposal(ike_proposal, PROTO_IKE));

	*cfg = this->ike_cfg;
	return TRUE;
	}
	return FALSE;
	}

	METHOD(enumerator_t, ike_enumerator_destroy, void,
	ike_enumerator_t *this)
	{
	DESTROY_IF(this->ike_cfg);
	this->inner->destroy(this->inner);
	free(this);
	}

	METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
	private_uci_config_t this, host_t me, host_t *other)
	{
	ike_enumerator_t *e;

	INIT(e,
	.public = {
	.enumerate = enumerator_enumerate_default,
	.venumerate = _ike_enumerator_enumerate,
	.destroy = _ike_enumerator_destroy,
	},
	.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;
	}

	METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
	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;
	}

	METHOD(uci_config_t, destroy, void,
	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;

	INIT(this,
	.public = {
	.backend = {
	.create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
	.create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
	.get_peer_cfg_by_name = _get_peer_cfg_by_name,
	},
	.destroy = _destroy,
	},
	.parser = parser,
	);

	return &this->public;
	}