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/*
* 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.
*
* $Id$
*/
#include "med_db_creds.h"
#include <daemon.h>
#include <library.h>
#include <utils/enumerator.h>
typedef struct private_med_db_creds_t private_med_db_creds_t;
/**
* Private data of an med_db_creds_t object
*/
struct private_med_db_creds_t {
/**
* Public part
*/
med_db_creds_t public;
/**
* underlying database handle
*/
database_t *db;
};
/**
* data passed between enumerate calls
*/
typedef struct {
/** current shared key */
shared_key_t *current;
} data_t;
typedef struct private_shared_key_t private_shared_key_t;
/**
* shared key implementation
*/
struct private_shared_key_t {
/** implements shared_key_t*/
shared_key_t public;
/** data of the key */
chunk_t key;
/** reference counter */
refcount_t ref;
};
/**
* Destroy allocated data_t struct
*/
static void data_destroy(data_t *this)
{
DESTROY_IF(this->current);
free(this);
}
/**
* Implementation of shared_key_t.get_type.
*/
static shared_key_type_t get_type(private_shared_key_t *this)
{
return SHARED_IKE;
}
/**
* Implementation of shared_key_t.get_ref.
*/
static private_shared_key_t* get_ref(private_shared_key_t *this)
{
ref_get(&this->ref);
return this;
}
/**
* Implementation of shared_key_t.destroy
*/
static void shared_key_destroy(private_shared_key_t *this)
{
if (ref_put(&this->ref))
{
chunk_free(&this->key);
free(this);
}
}
/**
* Implementation of shared_key_t.get_key.
*/
static chunk_t get_key(private_shared_key_t *this)
{
return this->key;
}
/**
* create a shared key
*/
static shared_key_t *shared_key_create(chunk_t key)
{
private_shared_key_t *this = malloc_thing(private_shared_key_t);
this->public.get_type = (shared_key_type_t(*)(shared_key_t*))get_type;
this->public.get_key = (chunk_t(*)(shared_key_t*))get_key;
this->public.get_ref = (shared_key_t*(*)(shared_key_t*))get_ref;
this->public.destroy = (void(*)(shared_key_t*))shared_key_destroy;
this->key = chunk_clone(key);
this->ref = 1;
return &this->public;
}
/**
* filter for enumerator, returns for each SQL result a shared key and match
*/
static bool filter(data_t *this, chunk_t *chunk, shared_key_t **out,
void **unused1, id_match_t *match_me,
void **unused2, id_match_t *match_other)
{
DESTROY_IF(this->current);
this->current = shared_key_create(*chunk);
*out = this->current;
/* we have unique matches only, but do not compare own ID */
if (match_me)
{
*match_me = ID_MATCH_ANY;
}
if (match_other)
{
*match_other = ID_MATCH_PERFECT;
}
return TRUE;
}
/**
* Implements credential_set_t.create_shared_enumerator
*/
static enumerator_t* create_shared_enumerator(private_med_db_creds_t *this,
shared_key_type_t type, identification_t *me,
identification_t *other)
{
enumerator_t *enumerator;
data_t *data;
if (type != SHARED_IKE)
{
return NULL;
}
enumerator = this->db->query(this->db,
"SELECT Psk FROM Peer WHERE PeerId = ?",
DB_BLOB, other->get_encoding(other),
DB_BLOB);
if (enumerator)
{
data = malloc_thing(data_t);
data->current = NULL;
return enumerator_create_filter(enumerator, (void*)filter,
data, (void*)data_destroy);
}
return NULL;
}
/**
* Implementation of backend_t.destroy.
*/
static void destroy(private_med_db_creds_t *this)
{
free(this);
}
/**
* Described in header.
*/
med_db_creds_t *med_db_creds_create(database_t *db)
{
private_med_db_creds_t *this = malloc_thing(private_med_db_creds_t);
this->public.set.create_private_enumerator = (void*)return_null;
this->public.set.create_cert_enumerator = (void*)return_null;
this->public.set.create_shared_enumerator = (void*)create_shared_enumerator;
this->public.set.create_cdp_enumerator = (void*)return_null;
this->public.destroy = (void (*)(med_db_creds_t*))destroy;
this->db = db;
return &this->public;
}
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