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/*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* 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 "pkcs11_plugin.h"
#include <library.h>
#include <debug.h>
#include <utils/linked_list.h>
#include <threading/mutex.h>
#include "pkcs11_manager.h"
#include "pkcs11_creds.h"
#include "pkcs11_private_key.h"
#include "pkcs11_public_key.h"
#include "pkcs11_hasher.h"
typedef struct private_pkcs11_plugin_t private_pkcs11_plugin_t;
/**
* private data of pkcs11_plugin
*/
struct private_pkcs11_plugin_t {
/**
* public functions
*/
pkcs11_plugin_t public;
/**
* PKCS#11 library/slot manager
*/
pkcs11_manager_t *manager;
/**
* List of credential sets, pkcs11_creds_t
*/
linked_list_t *creds;
/**
* mutex to lock list
*/
mutex_t *mutex;
};
/**
* Token event callback function
*/
static void token_event_cb(private_pkcs11_plugin_t *this, pkcs11_library_t *p11,
CK_SLOT_ID slot, bool add)
{
enumerator_t *enumerator;
pkcs11_creds_t *creds, *found = NULL;;
if (add)
{
creds = pkcs11_creds_create(p11, slot);
if (creds)
{
this->mutex->lock(this->mutex);
this->creds->insert_last(this->creds, creds);
this->mutex->unlock(this->mutex);
lib->credmgr->add_set(lib->credmgr, &creds->set);
}
}
else
{
this->mutex->lock(this->mutex);
enumerator = this->creds->create_enumerator(this->creds);
while (enumerator->enumerate(enumerator, &creds))
{
if (creds->get_library(creds) == p11 &&
creds->get_slot(creds) == slot)
{
found = creds;
this->creds->remove_at(this->creds, enumerator);
break;
}
}
enumerator->destroy(enumerator);
this->mutex->unlock(this->mutex);
if (found)
{
lib->credmgr->remove_set(lib->credmgr, &found->set);
found->destroy(found);
/* flush the cache after a token is gone */
lib->credmgr->flush_cache(lib->credmgr, CERT_X509);
}
}
}
METHOD(plugin_t, get_name, char*,
private_pkcs11_plugin_t *this)
{
return "pkcs11";
}
METHOD(plugin_t, destroy, void,
private_pkcs11_plugin_t *this)
{
pkcs11_creds_t *creds;
lib->creds->remove_builder(lib->creds,
(builder_function_t)pkcs11_private_key_connect);
while (this->creds->remove_last(this->creds, (void**)&creds) == SUCCESS)
{
lib->credmgr->remove_set(lib->credmgr, &creds->set);
creds->destroy(creds);
}
lib->crypto->remove_hasher(lib->crypto,
(hasher_constructor_t)pkcs11_hasher_create);
this->creds->destroy(this->creds);
this->manager->destroy(this->manager);
this->mutex->destroy(this->mutex);
free(this);
}
/*
* see header file
*/
plugin_t *pkcs11_plugin_create()
{
private_pkcs11_plugin_t *this;
enumerator_t *enumerator;
pkcs11_library_t *p11;
CK_SLOT_ID slot;
INIT(this,
.public = {
.plugin = {
.get_name = _get_name,
.reload = (void*)return_false,
.destroy = _destroy,
},
},
.creds = linked_list_create(),
.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
);
this->manager = pkcs11_manager_create((void*)token_event_cb, this);
if (lib->settings->get_bool(lib->settings,
"libstrongswan.plugins.pkcs11.use_hasher", FALSE))
{
lib->crypto->add_hasher(lib->crypto, HASH_MD2, get_name(this),
(hasher_constructor_t)pkcs11_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_MD5, get_name(this),
(hasher_constructor_t)pkcs11_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA1, get_name(this),
(hasher_constructor_t)pkcs11_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA256, get_name(this),
(hasher_constructor_t)pkcs11_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA384, get_name(this),
(hasher_constructor_t)pkcs11_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA512, get_name(this),
(hasher_constructor_t)pkcs11_hasher_create);
}
lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY, KEY_ANY, FALSE,
(builder_function_t)pkcs11_private_key_connect);
lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY, KEY_RSA, TRUE,
(builder_function_t)pkcs11_public_key_load);
enumerator = this->manager->create_token_enumerator(this->manager);
while (enumerator->enumerate(enumerator, &p11, &slot))
{
token_event_cb(this, p11, slot, TRUE);
}
enumerator->destroy(enumerator);
return &this->public.plugin;
}
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