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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: medsrv_creds.c 4317 2008-09-02 11:00:13Z martin $
*/
#include "medsrv_creds.h"
#include <daemon.h>
#include <library.h>
#include <utils/enumerator.h>
typedef struct private_medsrv_creds_t private_medsrv_creds_t;
/**
* Private data of an medsrv_creds_t object
*/
struct private_medsrv_creds_t {
/**
* Public part
*/
medsrv_creds_t public;
/**
* underlying database handle
*/
database_t *db;
};
/**
* enumerator over certificates
*/
typedef struct {
/** implements enumerator */
enumerator_t public;
/** inner SQL enumerator */
enumerator_t *inner;
/** currently enumerated cert */
certificate_t *current;
/** type of requested key */
key_type_t type;
} cert_enumerator_t;
/**
* Implementation of cert_enumerator_t.public.enumerate
*/
static bool cert_enumerator_enumerate(cert_enumerator_t *this,
certificate_t **cert)
{
certificate_t *trusted;
public_key_t *public;
chunk_t chunk;
DESTROY_IF(this->current);
while (this->inner->enumerate(this->inner, &chunk))
{
public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
BUILD_BLOB_ASN1_DER, chunk,
BUILD_END);
if (public)
{
if (this->type == KEY_ANY || this->type == public->get_type(public))
{
trusted = lib->creds->create(lib->creds,
CRED_CERTIFICATE, CERT_TRUSTED_PUBKEY,
BUILD_PUBLIC_KEY, public, BUILD_END);
public->destroy(public);
if (trusted)
{
*cert = this->current = trusted;
return TRUE;
}
}
else
{
public->destroy(public);
}
}
}
this->current = NULL;
return FALSE;
}
/**
* Implementation of cert_enumerator_t.public.destroy
*/
static void cert_enumerator_destroy(cert_enumerator_t *this)
{
DESTROY_IF(this->current);
this->inner->destroy(this->inner);
free(this);
}
/**
* Implementation of credential_set_t.create_cert_enumerator.
*/
static enumerator_t* create_cert_enumerator(private_medsrv_creds_t *this,
certificate_type_t cert, key_type_t key,
identification_t *id, bool trusted)
{
cert_enumerator_t *e;
if ((cert != CERT_TRUSTED_PUBKEY && cert != CERT_ANY) ||
id == NULL || id->get_type(id) != ID_KEY_ID)
{
return NULL;
}
e = malloc_thing(cert_enumerator_t);
e->current = NULL;
e->type = key;
e->public.enumerate = (void*)cert_enumerator_enumerate;
e->public.destroy = (void*)cert_enumerator_destroy;
e->inner = this->db->query(this->db,
"SELECT public_key FROM peer WHERE keyid = ?",
DB_BLOB, id->get_encoding(id),
DB_BLOB);
if (!e->inner)
{
free(e);
return NULL;
}
return &e->public;
}
/**
* Implementation of backend_t.destroy.
*/
static void destroy(private_medsrv_creds_t *this)
{
free(this);
}
/**
* Described in header.
*/
medsrv_creds_t *medsrv_creds_create(database_t *db)
{
private_medsrv_creds_t *this = malloc_thing(private_medsrv_creds_t);
this->public.set.create_private_enumerator = (void*)return_null;
this->public.set.create_cert_enumerator = (void*)create_cert_enumerator;
this->public.set.create_shared_enumerator = (void*)return_null;
this->public.set.create_cdp_enumerator = (void*)return_null;
this->public.set.cache_cert = (void*)nop;
this->public.destroy = (void (*)(medsrv_creds_t*))destroy;
this->db = db;
return &this->public;
}
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