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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008-2010
Copyright (C) Kamen Mazdrashki <kamen.mazdrashki@postpath.com> 2009
Copyright (C) Alexander Bokovoy <ab@samba.org> 2012
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 "lib/replace/system/python.h"
#include "includes.h"
#include "python/py3compat.h"
#include "python/modules.h"
#include "py_net.h"
#include "libnet_export_keytab.h"
#include "pyldb.h"
#include "libcli/util/pyerrors.h"
static PyObject *py_net_export_keytab(py_net_Object *self, PyObject *args, PyObject *kwargs)
{
struct libnet_export_keytab r = { .in = { .principal = NULL, }};
PyObject *py_samdb = NULL;
TALLOC_CTX *mem_ctx;
const char *kwnames[] = { "keytab",
"samdb",
"principal",
"keep_stale_entries",
"only_current_keys",
"as_for_AS_REQ",
NULL };
NTSTATUS status;
/*
* int, with values true or false, to match expectation of
* PyArg_ParseTupleAndKeywords()
*/
int keep_stale_entries = false;
int only_current_keys = false;
int as_for_AS_REQ = false;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|Ozppp:export_keytab", discard_const_p(char *, kwnames),
&r.in.keytab_name,
&py_samdb,
&r.in.principal,
&keep_stale_entries,
&only_current_keys,
&as_for_AS_REQ)) {
return NULL;
}
r.in.keep_stale_entries = keep_stale_entries;
r.in.only_current_keys = only_current_keys;
r.in.as_for_AS_REQ = as_for_AS_REQ;
if (py_samdb == NULL) {
r.in.samdb = NULL;
} else {
PyErr_LDB_OR_RAISE(py_samdb, r.in.samdb);
}
mem_ctx = talloc_new(self->mem_ctx);
if (mem_ctx == NULL) {
PyErr_NoMemory();
return NULL;
}
status = libnet_export_keytab(self->libnet_ctx, mem_ctx, &r);
if (!NT_STATUS_IS_OK(status)) {
PyErr_SetNTSTATUS_and_string(status,
r.out.error_string
? r.out.error_string
: nt_errstr(status));
talloc_free(mem_ctx);
return NULL;
}
talloc_free(mem_ctx);
Py_RETURN_NONE;
}
static const char py_net_export_keytab_doc[] =
"export_keytab(keytab, samdb=None, principal=None, "
"keep_stale_entries=False, only_current_keys=False, "
"as_for_AS_REQ=False)\n\n"
"Export the DC keytab to a keytab file.\n\n"
"Pass as_for_AS_REQ=True to simulate the combination of flags normally "
"utilized for an AS‐REQ. Samba’s testsuite uses this to verify which "
"keys the KDC would see — some combination of previous and current "
"keys — for a Group Managed Service Account performing an AS‐REQ.";
static PyMethodDef export_keytab_method_table[] = {
{"export_keytab", PY_DISCARD_FUNC_SIG(PyCFunction,
py_net_export_keytab),
METH_VARARGS|METH_KEYWORDS, py_net_export_keytab_doc},
{ NULL, NULL, 0, NULL }
};
/*
* A fake Python module to inject export_keytab() method into existing samba.net.Net class.
* Python enforces that every loaded module actually creates Python module record in
* the global module table even if we don't really need that record. Thus, we initialize
* dckeytab module but never use it.
* */
static struct PyModuleDef moduledef = {
PyModuleDef_HEAD_INIT,
.m_name = "dckeytab",
.m_doc = "dckeytab",
.m_size = -1,
.m_methods = NULL
};
MODULE_INIT_FUNC(dckeytab)
{
PyObject *m = NULL;
PyObject *Net;
PyObject *descr;
int ret;
m = PyModule_Create(&moduledef);
if (m == NULL)
return m;
m = PyImport_ImportModule("samba.net");
if (m == NULL)
return m;
Net = (PyObject *)PyObject_GetAttrString(m, "Net");
if (Net == NULL)
return m;
descr = PyDescr_NewMethod((PyTypeObject*)Net, &export_keytab_method_table[0]);
if (descr == NULL)
return m;
ret = PyDict_SetItemString(((PyTypeObject*)Net)->tp_dict,
export_keytab_method_table[0].ml_name,
descr);
if (ret != -1) {
Py_DECREF(descr);
}
return m;
}
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