386 lines
9.9 KiB
C
386 lines
9.9 KiB
C
/*
|
|
* Copyright (C) 2013 Tobias Brunner
|
|
* Copyright (C) 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 "eap_radius_plugin.h"
|
|
|
|
#include "eap_radius.h"
|
|
#include "eap_radius_xauth.h"
|
|
#include "eap_radius_accounting.h"
|
|
#include "eap_radius_dae.h"
|
|
#include "eap_radius_forward.h"
|
|
#include "eap_radius_provider.h"
|
|
|
|
#include <radius_client.h>
|
|
#include <radius_config.h>
|
|
|
|
#include <hydra.h>
|
|
#include <threading/rwlock.h>
|
|
#include <processing/jobs/callback_job.h>
|
|
#include <processing/jobs/delete_ike_sa_job.h>
|
|
|
|
/**
|
|
* Default RADIUS server port for authentication
|
|
*/
|
|
#define AUTH_PORT 1812
|
|
|
|
/**
|
|
* Default RADIUS server port for accounting
|
|
*/
|
|
#define ACCT_PORT 1813
|
|
|
|
typedef struct private_eap_radius_plugin_t private_eap_radius_plugin_t;
|
|
|
|
/**
|
|
* Private data of an eap_radius_plugin_t object.
|
|
*/
|
|
struct private_eap_radius_plugin_t {
|
|
|
|
/**
|
|
* Public radius_plugin_t interface.
|
|
*/
|
|
eap_radius_plugin_t public;
|
|
|
|
/**
|
|
* List of RADIUS server configurations
|
|
*/
|
|
linked_list_t *configs;
|
|
|
|
/**
|
|
* Lock for configs list
|
|
*/
|
|
rwlock_t *lock;
|
|
|
|
/**
|
|
* RADIUS sessions for accounting
|
|
*/
|
|
eap_radius_accounting_t *accounting;
|
|
|
|
/**
|
|
* IKE attribute provider
|
|
*/
|
|
eap_radius_provider_t *provider;
|
|
|
|
/**
|
|
* Dynamic authorization extensions
|
|
*/
|
|
eap_radius_dae_t *dae;
|
|
|
|
/**
|
|
* RADIUS <-> IKE attribute forwarding
|
|
*/
|
|
eap_radius_forward_t *forward;
|
|
};
|
|
|
|
/**
|
|
* Instance of the EAP plugin
|
|
*/
|
|
static private_eap_radius_plugin_t *instance = NULL;
|
|
|
|
/**
|
|
* Load RADIUS servers from configuration
|
|
*/
|
|
static void load_configs(private_eap_radius_plugin_t *this)
|
|
{
|
|
enumerator_t *enumerator;
|
|
radius_config_t *config;
|
|
char *nas_identifier, *secret, *address, *section;
|
|
int auth_port, acct_port, sockets, preference;
|
|
|
|
address = lib->settings->get_str(lib->settings,
|
|
"%s.plugins.eap-radius.server", NULL, lib->ns);
|
|
if (address)
|
|
{ /* legacy configuration */
|
|
secret = lib->settings->get_str(lib->settings,
|
|
"%s.plugins.eap-radius.secret", NULL, lib->ns);
|
|
if (!secret)
|
|
{
|
|
DBG1(DBG_CFG, "no RADIUS secret defined");
|
|
return;
|
|
}
|
|
nas_identifier = lib->settings->get_str(lib->settings,
|
|
"%s.plugins.eap-radius.nas_identifier", "strongSwan",
|
|
lib->ns);
|
|
auth_port = lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.port", AUTH_PORT, lib->ns);
|
|
sockets = lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.sockets", 1, lib->ns);
|
|
config = radius_config_create(address, address, auth_port, ACCT_PORT,
|
|
nas_identifier, secret, sockets, 0);
|
|
if (!config)
|
|
{
|
|
DBG1(DBG_CFG, "no RADUIS server defined");
|
|
return;
|
|
}
|
|
this->configs->insert_last(this->configs, config);
|
|
return;
|
|
}
|
|
|
|
enumerator = lib->settings->create_section_enumerator(lib->settings,
|
|
"%s.plugins.eap-radius.servers", lib->ns);
|
|
while (enumerator->enumerate(enumerator, §ion))
|
|
{
|
|
address = lib->settings->get_str(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.address", NULL,
|
|
lib->ns, section);
|
|
if (!address)
|
|
{
|
|
DBG1(DBG_CFG, "RADIUS server '%s' misses address, skipped", section);
|
|
continue;
|
|
}
|
|
secret = lib->settings->get_str(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.secret", NULL,
|
|
lib->ns, section);
|
|
if (!secret)
|
|
{
|
|
DBG1(DBG_CFG, "RADIUS server '%s' misses secret, skipped", section);
|
|
continue;
|
|
}
|
|
nas_identifier = lib->settings->get_str(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.nas_identifier", "strongSwan",
|
|
lib->ns, section);
|
|
auth_port = lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.auth_port",
|
|
lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.port",
|
|
AUTH_PORT, lib->ns, section),
|
|
lib->ns, section);
|
|
acct_port = lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.acct_port", ACCT_PORT,
|
|
lib->ns, section);
|
|
sockets = lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.sockets", 1,
|
|
lib->ns, section);
|
|
preference = lib->settings->get_int(lib->settings,
|
|
"%s.plugins.eap-radius.servers.%s.preference", 0,
|
|
lib->ns, section);
|
|
config = radius_config_create(section, address, auth_port, acct_port,
|
|
nas_identifier, secret, sockets, preference);
|
|
if (!config)
|
|
{
|
|
DBG1(DBG_CFG, "loading RADIUS server '%s' failed, skipped", section);
|
|
continue;
|
|
}
|
|
this->configs->insert_last(this->configs, config);
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
DBG1(DBG_CFG, "loaded %d RADIUS server configuration%s",
|
|
this->configs->get_count(this->configs),
|
|
this->configs->get_count(this->configs) == 1 ? "" : "s");
|
|
}
|
|
|
|
METHOD(plugin_t, get_name, char*,
|
|
private_eap_radius_plugin_t *this)
|
|
{
|
|
return "eap-radius";
|
|
}
|
|
|
|
/**
|
|
* Register listener
|
|
*/
|
|
static bool plugin_cb(private_eap_radius_plugin_t *this,
|
|
plugin_feature_t *feature, bool reg, void *cb_data)
|
|
{
|
|
if (reg)
|
|
{
|
|
this->accounting = eap_radius_accounting_create();
|
|
this->forward = eap_radius_forward_create();
|
|
this->provider = eap_radius_provider_create();
|
|
|
|
load_configs(this);
|
|
|
|
if (lib->settings->get_bool(lib->settings,
|
|
"%s.plugins.eap-radius.dae.enable", FALSE, lib->ns))
|
|
{
|
|
this->dae = eap_radius_dae_create(this->accounting);
|
|
}
|
|
if (this->forward)
|
|
{
|
|
charon->bus->add_listener(charon->bus, &this->forward->listener);
|
|
}
|
|
hydra->attributes->add_provider(hydra->attributes,
|
|
&this->provider->provider);
|
|
}
|
|
else
|
|
{
|
|
hydra->attributes->remove_provider(hydra->attributes,
|
|
&this->provider->provider);
|
|
if (this->forward)
|
|
{
|
|
charon->bus->remove_listener(charon->bus, &this->forward->listener);
|
|
this->forward->destroy(this->forward);
|
|
}
|
|
DESTROY_IF(this->dae);
|
|
this->provider->destroy(this->provider);
|
|
this->accounting->destroy(this->accounting);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
METHOD(plugin_t, get_features, int,
|
|
private_eap_radius_plugin_t *this, plugin_feature_t *features[])
|
|
{
|
|
static plugin_feature_t f[] = {
|
|
PLUGIN_CALLBACK(eap_method_register, eap_radius_create),
|
|
PLUGIN_PROVIDE(EAP_SERVER, EAP_RADIUS),
|
|
PLUGIN_DEPENDS(CUSTOM, "eap-radius"),
|
|
PLUGIN_CALLBACK(xauth_method_register, eap_radius_xauth_create_server),
|
|
PLUGIN_PROVIDE(XAUTH_SERVER, "radius"),
|
|
PLUGIN_DEPENDS(CUSTOM, "eap-radius"),
|
|
PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
|
|
PLUGIN_PROVIDE(CUSTOM, "eap-radius"),
|
|
PLUGIN_DEPENDS(HASHER, HASH_MD5),
|
|
PLUGIN_DEPENDS(SIGNER, AUTH_HMAC_MD5_128),
|
|
PLUGIN_DEPENDS(RNG, RNG_WEAK),
|
|
};
|
|
*features = f;
|
|
return countof(f);
|
|
}
|
|
|
|
METHOD(plugin_t, reload, bool,
|
|
private_eap_radius_plugin_t *this)
|
|
{
|
|
this->lock->write_lock(this->lock);
|
|
this->configs->destroy_offset(this->configs,
|
|
offsetof(radius_config_t, destroy));
|
|
this->configs = linked_list_create();
|
|
load_configs(this);
|
|
this->lock->unlock(this->lock);
|
|
return TRUE;
|
|
}
|
|
|
|
METHOD(plugin_t, destroy, void,
|
|
private_eap_radius_plugin_t *this)
|
|
{
|
|
this->configs->destroy_offset(this->configs,
|
|
offsetof(radius_config_t, destroy));
|
|
this->lock->destroy(this->lock);
|
|
free(this);
|
|
instance = NULL;
|
|
}
|
|
|
|
/*
|
|
* see header file
|
|
*/
|
|
plugin_t *eap_radius_plugin_create()
|
|
{
|
|
private_eap_radius_plugin_t *this;
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.plugin = {
|
|
.get_name = _get_name,
|
|
.get_features = _get_features,
|
|
.reload = _reload,
|
|
.destroy = _destroy,
|
|
},
|
|
},
|
|
.configs = linked_list_create(),
|
|
.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
|
|
);
|
|
instance = this;
|
|
|
|
return &this->public.plugin;
|
|
}
|
|
|
|
/**
|
|
* See header
|
|
*/
|
|
radius_client_t *eap_radius_create_client()
|
|
{
|
|
if (instance)
|
|
{
|
|
enumerator_t *enumerator;
|
|
radius_config_t *config, *selected = NULL;
|
|
int current, best = -1;
|
|
|
|
instance->lock->read_lock(instance->lock);
|
|
enumerator = instance->configs->create_enumerator(instance->configs);
|
|
while (enumerator->enumerate(enumerator, &config))
|
|
{
|
|
current = config->get_preference(config);
|
|
if (current > best ||
|
|
/* for two with equal preference, 50-50 chance */
|
|
(current == best && random() % 2 == 0))
|
|
{
|
|
DBG2(DBG_CFG, "RADIUS server '%s' is candidate: %d",
|
|
config->get_name(config), current);
|
|
best = current;
|
|
DESTROY_IF(selected);
|
|
selected = config->get_ref(config);
|
|
}
|
|
else
|
|
{
|
|
DBG2(DBG_CFG, "RADIUS server '%s' skipped: %d",
|
|
config->get_name(config), current);
|
|
}
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
instance->lock->unlock(instance->lock);
|
|
|
|
if (selected)
|
|
{
|
|
return radius_client_create(selected);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Job to delete all active IKE_SAs
|
|
*/
|
|
static job_requeue_t delete_all_async(void *data)
|
|
{
|
|
enumerator_t *enumerator;
|
|
ike_sa_t *ike_sa;
|
|
|
|
enumerator = charon->ike_sa_manager->create_enumerator(
|
|
charon->ike_sa_manager, TRUE);
|
|
while (enumerator->enumerate(enumerator, &ike_sa))
|
|
{
|
|
lib->processor->queue_job(lib->processor,
|
|
(job_t*)delete_ike_sa_job_create(ike_sa->get_id(ike_sa), TRUE));
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
return JOB_REQUEUE_NONE;
|
|
}
|
|
|
|
/**
|
|
* See header.
|
|
*/
|
|
void eap_radius_handle_timeout(ike_sa_id_t *id)
|
|
{
|
|
charon->bus->alert(charon->bus, ALERT_RADIUS_NOT_RESPONDING);
|
|
|
|
if (lib->settings->get_bool(lib->settings,
|
|
"%s.plugins.eap-radius.close_all_on_timeout",
|
|
FALSE, lib->ns))
|
|
{
|
|
DBG1(DBG_CFG, "deleting all IKE_SAs after RADIUS timeout");
|
|
lib->processor->queue_job(lib->processor,
|
|
(job_t*)callback_job_create_with_prio(
|
|
(callback_job_cb_t)delete_all_async, NULL, NULL,
|
|
(callback_job_cancel_t)return_false, JOB_PRIO_CRITICAL));
|
|
}
|
|
else if (id)
|
|
{
|
|
DBG1(DBG_CFG, "deleting IKE_SA after RADIUS timeout");
|
|
lib->processor->queue_job(lib->processor,
|
|
(job_t*)delete_ike_sa_job_create(id, TRUE));
|
|
}
|
|
}
|