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/* server_authorization.c
*
* User authorization database.
*
*/
/* lsh, an implementation of the ssh protocol
*
* Copyright (C) 1999 Balzs Scheidler
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include "server_authorization.h"
#include "format.h"
#include "publickey_crypto.h"
#include "server_userauth.h"
#include "sexp.h"
#include "spki.h"
#include "xalloc.h"
#include "server_authorization.c.x"
/* For now a key is authorized if a file named as the hash of the
SPKI pubkey exists */
/* GABA:
(class
(name authorization_db)
(super lookup_verifier)
(vars
(index_name string)
;; (signalgo object signature_algorithm)
(hashalgo const object hash_algorithm)))
*/
static struct verifier *
do_key_lookup(struct lookup_verifier *c,
int method,
struct lsh_user *keyholder,
struct lsh_string *key)
{
CAST(authorization_db, closure, c);
struct lsh_string *filename;
struct verifier *v = NULL;
assert(keyholder);
switch (method)
{
default:
return NULL;
/* FIXME: SPKI support. */
case ATOM_SSH_DSS:
v = make_ssh_dss_verifier(key);
break;
case ATOM_SSH_RSA:
v = make_ssh_rsa_verifier(key);
break;
}
if (!v)
return NULL;
/* FIXME: Proper spki acl reading should go here. */
filename = ssh_format(".lsh/%lS/%lxfS",
closure->index_name,
hash_string(closure->hashalgo,
PUBLIC_SPKI_KEY(v, 0),
1));
if (USER_FILE_EXISTS(keyholder, filename, 1))
return v;
return NULL;
}
struct lookup_verifier *
make_authorization_db(struct lsh_string *index_name,
/* struct signature_algorithm *s, */
const struct hash_algorithm *h)
{
NEW(authorization_db, res);
res->super.lookup = do_key_lookup;
res->index_name = index_name;
/* res->signalgo = s; */
res->hashalgo = h;
return &res->super;
}
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