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/*
Unix SMB/Netbios implementation.
Version 2.0.
a tdb database with record level security.
Copyright (C) Andrew Tridgell 2000
Copyright (C) Luke Kenneth Casson Leighton 2000
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
*
* int tdbsec_set(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA secdata)
*
*
* TDB_DATA tdbsec_fetch(TDB_CONTEXT *tdb, TDB_DATA key,
* int (*sec_check)(TDB_DATA , void *), void *arg)
*
*
* int tdbsec_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data,
* int (*sec_check)(TDB_DATA , void *), void *arg)
*
*/
#include "includes.h"
#define SEC_KEY "SEC/"
#degine SEC_KEY_LEN 4
static TDB_DATA null_data;
static TDB_DATA tdbsec_genkey(TDB_DATA key)
{
TDB_DATA key2;
key2.dsize = SEC_KEY_LEN+key.dsize;
key2.dptr = (char *)malloc(key2.dsize);
if (!key2.dptr) return null_data;
memcpy(key2.dptr, SEC_KEY, SEC_KEY_LEN);
memcpy(key2.dptr + SEC_KEY_LEN, key.dptr, key.dsize);
return key2;
}
static void tdbsec_free(TDB_DATA d)
{
if (d.dptr) free(d.dptr);
}
TDB_DATA tdbsec_fetch(TDB_CONTEXT *tdb, TDB_DATA key,
int (*sec_check)(TDB_DATA , void *), void *arg)
{
TDB_DATA key2, data2;
data2 = null_data;
key2 = tdbsec_genkey(key);
if (!key2.dptr) goto failed;
data2 = tdb_fetch(tdb, key2);
if (sec_check(data2, arg) != 0) {
goto failed;
}
tdbsec_free(key2);
tdbsec_free(data2);
return tdb_fetch(tdb, key);
failed:
tdbsec_free(key2);
tdbsec_free(data2);
return null_data;
}
int tdbsec_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data,
int (*sec_check)(TDB_DATA , void *), void *arg)
{
TDB_DATA key2, data2;
data2 = null_data;
key2 = tdbsec_genkey(key);
if (!key2.dptr) goto failed;
data2 = tdb_fetch(tdb, key2);
if (sec_check(data2, arg) != 0) {
goto failed;
}
tdbsec_free(key2);
tdbsec_free(data2);
return tdb_store(tdb, key, data, TDB_REPLACE);
failed:
tdbsec_free(key2);
tdbsec_free(data2);
return -1;
}
int tdbsec_set(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA secdata)
{
int ret;
TDB_DATA key2;
key2 = tdbsec_genkey(key);
if (!key2.dptr) return -1;
ret = tdb_store(tdb, key2, secdata, TDB_REPLACE);
tdbsec_free(key2);
return ret;
}
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