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/*
Unix SMB/CIFS implementation.
Copyright (C) Guenther Deschner 2009
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../libcli/auth/libcli_auth.h"
#include "../libcli/auth/schannel_state.h"
/******************************************************************************
Open or create the schannel session store tdb.
*******************************************************************************/
#define SCHANNEL_STORE_VERSION_1 1
#define SCHANNEL_STORE_VERSION_2 2 /* should not be used */
#define SCHANNEL_STORE_VERSION_CURRENT SCHANNEL_STORE_VERSION_1
TDB_CONTEXT *open_schannel_session_store(TALLOC_CTX *mem_ctx)
{
TDB_DATA vers;
uint32 ver;
TDB_CONTEXT *tdb_sc = NULL;
char *fname = talloc_asprintf(mem_ctx, "%s/schannel_store.tdb", lp_private_dir());
if (!fname) {
return NULL;
}
tdb_sc = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
if (!tdb_sc) {
DEBUG(0,("open_schannel_session_store: Failed to open %s\n", fname));
TALLOC_FREE(fname);
return NULL;
}
again:
vers = tdb_fetch_bystring(tdb_sc, "SCHANNEL_STORE_VERSION");
if (vers.dptr == NULL) {
/* First opener, no version. */
SIVAL(&ver,0,SCHANNEL_STORE_VERSION_CURRENT);
vers.dptr = (uint8 *)&ver;
vers.dsize = 4;
tdb_store_bystring(tdb_sc, "SCHANNEL_STORE_VERSION", vers, TDB_REPLACE);
vers.dptr = NULL;
} else if (vers.dsize == 4) {
ver = IVAL(vers.dptr,0);
if (ver == SCHANNEL_STORE_VERSION_2) {
DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
(int)ver, fname ));
tdb_wipe_all(tdb_sc);
goto again;
}
if (ver != SCHANNEL_STORE_VERSION_CURRENT) {
DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
(int)ver, fname ));
tdb_close(tdb_sc);
tdb_sc = NULL;
}
} else {
tdb_close(tdb_sc);
tdb_sc = NULL;
DEBUG(0,("open_schannel_session_store: wrong version number size %d in %s\n",
(int)vers.dsize, fname ));
}
SAFE_FREE(vers.dptr);
TALLOC_FREE(fname);
return tdb_sc;
}
/******************************************************************************
Wrapper around schannel_fetch_session_key_tdb()
Note we must be root here.
*******************************************************************************/
NTSTATUS schannel_fetch_session_key(TALLOC_CTX *mem_ctx,
const char *computer_name,
struct netlogon_creds_CredentialState **pcreds)
{
struct tdb_context *tdb;
NTSTATUS status;
tdb = open_schannel_session_store(mem_ctx);
if (!tdb) {
return NT_STATUS_ACCESS_DENIED;
}
status = schannel_fetch_session_key_tdb(tdb, mem_ctx, computer_name, pcreds);
tdb_close(tdb);
return status;
}
/******************************************************************************
Wrapper around schannel_store_session_key_tdb()
Note we must be root here.
*******************************************************************************/
NTSTATUS schannel_store_session_key(TALLOC_CTX *mem_ctx,
struct netlogon_creds_CredentialState *creds)
{
struct tdb_context *tdb;
NTSTATUS status;
tdb = open_schannel_session_store(mem_ctx);
if (!tdb) {
return NT_STATUS_ACCESS_DENIED;
}
status = schannel_store_session_key_tdb(tdb, mem_ctx, creds);
tdb_close(tdb);
return status;
}
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