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mirror of https://github.com/samba-team/samba.git synced 2024-12-22 13:34:15 +03:00
samba-mirror/source4/librpc/rpc/pyrpc.c
Andreas Schneider 9621a3d7a6 Use python.h from libreplace
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15513

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-11-20 15:37:33 +00:00

652 lines
18 KiB
C

/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
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 "python/py3compat.h"
#include "includes.h"
#include "python/modules.h"
#include <structmember.h>
#include "librpc/rpc/pyrpc.h"
#include "lib/events/events.h"
#include "param/pyparam.h"
#include "librpc/rpc/dcerpc.h"
#include "librpc/rpc/pyrpc_util.h"
#include "auth/credentials/pycredentials.h"
#include "auth/gensec/gensec.h"
void initbase(void);
static PyTypeObject dcerpc_InterfaceType;
static PyTypeObject *BaseObject_Type;
static PyTypeObject *ndr_syntax_id_Type;
static bool PyString_AsGUID(PyObject *object, struct GUID *uuid)
{
NTSTATUS status;
status = GUID_from_string(PyUnicode_AsUTF8(object), uuid);
if (NT_STATUS_IS_ERR(status)) {
PyErr_SetNTSTATUS(status);
return false;
}
return true;
}
static bool ndr_syntax_from_py_object(PyObject *object, struct ndr_syntax_id *syntax_id)
{
ZERO_STRUCTP(syntax_id);
if (PyUnicode_Check(object)) {
return PyString_AsGUID(object, &syntax_id->uuid);
}
if (PyTuple_Check(object)) {
PyObject *item = NULL;
if (PyTuple_Size(object) < 1 || PyTuple_Size(object) > 2) {
PyErr_SetString(PyExc_ValueError, "Syntax ID tuple has invalid size");
return false;
}
item = PyTuple_GetItem(object, 0);
if (!PyUnicode_Check(item)) {
PyErr_SetString(PyExc_ValueError, "Expected GUID as first element in tuple");
return false;
}
if (!PyString_AsGUID(item, &syntax_id->uuid)) {
return false;
}
item = PyTuple_GetItem(object, 1);
if (!PyLong_Check(item)) {
PyErr_SetString(PyExc_ValueError, "Expected version as second element in tuple");
return false;
}
syntax_id->if_version = PyLong_AsLong(item);
return true;
}
PyErr_SetString(PyExc_TypeError, "Expected UUID or syntax id tuple");
return false;
}
static PyObject *py_iface_server_name(PyObject *obj, void *closure)
{
const char *server_name;
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
server_name = dcerpc_server_name(iface->pipe);
if (server_name == NULL)
Py_RETURN_NONE;
return PyUnicode_FromString(server_name);
}
static PyObject *py_ndr_syntax_id(struct ndr_syntax_id *syntax_id)
{
PyObject *ret;
struct GUID_txt_buf buf;
ret = Py_BuildValue(
"(s,i)",
GUID_buf_string(&syntax_id->uuid, &buf),
syntax_id->if_version);
return ret;
}
static PyObject *py_iface_abstract_syntax(PyObject *obj, void *closure)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
return py_ndr_syntax_id(&iface->pipe->syntax);
}
static PyObject *py_iface_transfer_syntax(PyObject *obj, void *closure)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
return py_ndr_syntax_id(&iface->pipe->transfer_syntax);
}
static PyObject *py_iface_session_key(PyObject *obj, void *closure)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
DATA_BLOB session_key;
NTSTATUS status = dcerpc_fetch_session_key(iface->pipe, &session_key);
PyErr_NTSTATUS_IS_ERR_RAISE(status);
return PyBytes_FromStringAndSize((const char *)session_key.data, session_key.length);
}
static PyObject *py_iface_user_session_key(PyObject *obj, void *closure)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
TALLOC_CTX *mem_ctx;
NTSTATUS status;
struct gensec_security *security = NULL;
DATA_BLOB session_key = data_blob_null;
static PyObject *session_key_obj = NULL;
if (iface->pipe == NULL) {
PyErr_SetNTSTATUS(NT_STATUS_NO_USER_SESSION_KEY);
return NULL;
}
if (iface->pipe->conn == NULL) {
PyErr_SetNTSTATUS(NT_STATUS_NO_USER_SESSION_KEY);
return NULL;
}
if (iface->pipe->conn->security_state.generic_state == NULL) {
PyErr_SetNTSTATUS(NT_STATUS_NO_USER_SESSION_KEY);
return NULL;
}
security = iface->pipe->conn->security_state.generic_state;
mem_ctx = talloc_new(NULL);
status = gensec_session_key(security, mem_ctx, &session_key);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(mem_ctx);
PyErr_SetNTSTATUS(status);
return NULL;
}
session_key_obj = PyBytes_FromStringAndSize((const char *)session_key.data,
session_key.length);
talloc_free(mem_ctx);
return session_key_obj;
}
static PyObject *py_iface_get_timeout(PyObject *obj, void *closure)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
uint32_t timeout;
timeout = dcerpc_binding_handle_set_timeout(iface->binding_handle, 0);
dcerpc_binding_handle_set_timeout(iface->binding_handle, timeout);
return PyLong_FromUnsignedLong(timeout);
}
static int py_iface_set_timeout(PyObject *obj, PyObject *value, void *closure)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
uint32_t timeout;
timeout = PyLong_AsUnsignedLong(value);
if (PyErr_Occurred() != NULL) {
return -1;
}
dcerpc_binding_handle_set_timeout(iface->binding_handle, timeout);
return 0;
}
static PyGetSetDef dcerpc_interface_getsetters[] = {
{
.name = discard_const_p(char, "server_name"),
.get = py_iface_server_name,
.doc = discard_const_p(char, "name of the server, if connected over SMB"),
},
{
.name = discard_const_p(char, "abstract_syntax"),
.get = py_iface_abstract_syntax,
.doc = discard_const_p(char, "syntax id of the abstract syntax"),
},
{
.name = discard_const_p(char, "transfer_syntax"),
.get = py_iface_transfer_syntax,
.doc = discard_const_p(char, "syntax id of the transfer syntax"),
},
{
.name = discard_const_p(char, "session_key"),
.get = py_iface_session_key,
.doc = discard_const_p(char, "session key (as used for blob encryption on LSA and SAMR)"),
},
{
.name = discard_const_p(char, "user_session_key"),
.get = py_iface_user_session_key,
.doc = discard_const_p(char, "user_session key (as used for blob encryption on DRSUAPI)"),
},
{
.name = discard_const_p(char, "request_timeout"),
.get = py_iface_get_timeout,
.set = py_iface_set_timeout,
.doc = discard_const_p(char, "request timeout, in seconds"),
},
{ .name = NULL }
};
static PyObject *py_iface_request(PyObject *self, PyObject *args, PyObject *kwargs)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
int opnum;
DATA_BLOB data_in, data_out;
NTSTATUS status;
char *in_data;
Py_ssize_t in_length;
PyObject *ret;
PyObject *object = NULL;
struct GUID object_guid;
TALLOC_CTX *mem_ctx = talloc_new(NULL);
uint32_t out_flags = 0;
const char *kwnames[] = { "opnum", "data", "object", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "is#|O:request",
discard_const_p(char *, kwnames), &opnum, &in_data, &in_length, &object)) {
talloc_free(mem_ctx);
return NULL;
}
data_in.data = (uint8_t *)talloc_memdup(mem_ctx, in_data, in_length);
data_in.length = in_length;
ZERO_STRUCT(data_out);
if (object != NULL && !PyString_AsGUID(object, &object_guid)) {
talloc_free(mem_ctx);
return NULL;
}
status = dcerpc_binding_handle_raw_call(iface->binding_handle,
object?&object_guid:NULL,
opnum,
0, /* in_flags */
data_in.data,
data_in.length,
mem_ctx,
&data_out.data,
&data_out.length,
&out_flags);
if (!NT_STATUS_IS_OK(status)) {
PyErr_SetDCERPCStatus(iface->pipe, status);
talloc_free(mem_ctx);
return NULL;
}
ret = PyBytes_FromStringAndSize((char *)data_out.data, data_out.length);
talloc_free(mem_ctx);
return ret;
}
static PyObject *py_iface_transport_encrypted(PyObject *self)
{
dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
if (dcerpc_transport_encrypted(iface->pipe)) {
Py_RETURN_TRUE;
}
Py_RETURN_FALSE;
}
static PyMethodDef dcerpc_interface_methods[] = {
{ "request", PY_DISCARD_FUNC_SIG(PyCFunction, py_iface_request),
METH_VARARGS|METH_KEYWORDS,
"S.request(opnum, data, object=None) -> data\n"
"Make a raw request" },
{ "transport_encrypted", PY_DISCARD_FUNC_SIG(PyCFunction, py_iface_transport_encrypted),
METH_NOARGS,
"Check if the DCE transport is encrypted" },
{ NULL, NULL, 0, NULL },
};
static void dcerpc_interface_dealloc(PyObject* self)
{
dcerpc_InterfaceObject *interface = (dcerpc_InterfaceObject *)self;
struct tevent_context *ev_save = talloc_reparent(
interface->mem_ctx, NULL, interface->ev);
SMB_ASSERT(ev_save != NULL);
interface->binding_handle = NULL;
interface->pipe = NULL;
/*
* Free everything *except* the event context, which must go
* away last
*/
TALLOC_FREE(interface->mem_ctx);
/*
* Now wish a fond goodbye to the event context itself
*/
talloc_unlink(NULL, ev_save);
self->ob_type->tp_free(self);
}
static PyObject *dcerpc_interface_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
PyObject *ret;
const char *binding_string = NULL;
PyObject *py_lp_ctx = Py_None;
PyObject *py_credentials = Py_None;
PyObject *syntax = Py_None;
PyObject *py_basis = Py_None;
const char *kwnames[] = {
"binding", "syntax", "lp_ctx", "credentials", "basis_connection", NULL
};
static struct ndr_interface_table dummy_table;
static struct ndr_interface_string_array dummy_endpoints;
PyObject *args2 = Py_None;
PyObject *kwargs2 = Py_None;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|OOO:connect", discard_const_p(char *, kwnames), &binding_string, &syntax, &py_lp_ctx, &py_credentials, &py_basis)) {
return NULL;
}
if (strncmp(binding_string, "irpc:", 5) == 0) {
PyErr_SetString(PyExc_ValueError, "irpc: transport not supported");
return NULL;
}
/*
* Fill a dummy interface table struct. TODO: In the future, we should
* rather just allow connecting without requiring an interface table.
*
* We just fill the syntax during the connect, but keep the memory valid
* the whole time.
*/
if (!ndr_syntax_from_py_object(syntax, &dummy_table.syntax_id)) {
return NULL;
}
/*
* Initialise the endpoints list in dummy_table if required
*/
if (dummy_table.endpoints == NULL) {
dummy_table.endpoints = &dummy_endpoints;
}
args2 = Py_BuildValue("(s)", binding_string);
if (args2 == NULL) {
return NULL;
}
kwargs2 = Py_BuildValue("{s:O,s:O,s:O}",
"lp_ctx", py_lp_ctx,
"credentials", py_credentials,
"basis_connection", py_basis);
if (kwargs2 == NULL) {
Py_DECREF(args2);
return NULL;
}
ret = py_dcerpc_interface_init_helper(type, args2, kwargs2, &dummy_table);
ZERO_STRUCT(dummy_table.syntax_id);
Py_DECREF(args2);
Py_DECREF(kwargs2);
return ret;
}
static PyTypeObject dcerpc_InterfaceType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "dcerpc.ClientConnection",
.tp_basicsize = sizeof(dcerpc_InterfaceObject),
.tp_dealloc = dcerpc_interface_dealloc,
.tp_getset = dcerpc_interface_getsetters,
.tp_methods = dcerpc_interface_methods,
.tp_doc = "ClientConnection(binding, syntax, lp_ctx=None, credentials=None) -> connection\n"
"\n"
"binding should be a DCE/RPC binding string (for example: ncacn_ip_tcp:127.0.0.1)\n"
"syntax should be a tuple with a GUID and version number of an interface\n"
"lp_ctx should be a path to a smb.conf file or a param.LoadParm object\n"
"credentials should be a credentials.Credentials object.\n\n",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_new = dcerpc_interface_new,
};
static PyObject *py_transfer_syntax_ndr_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
return py_dcerpc_syntax_init_helper(type, args, kwargs, &ndr_transfer_syntax_ndr);
}
static PyTypeObject py_transfer_syntax_ndr_SyntaxType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "base.transfer_syntax_ndr",
.tp_doc = "transfer_syntax_ndr()\n",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_new = py_transfer_syntax_ndr_new,
};
static PyObject *py_transfer_syntax_ndr64_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
return py_dcerpc_syntax_init_helper(type, args, kwargs, &ndr_transfer_syntax_ndr64);
}
static PyTypeObject py_transfer_syntax_ndr64_SyntaxType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "base.transfer_syntax_ndr64",
.tp_doc = "transfer_syntax_ndr64()\n",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_new = py_transfer_syntax_ndr64_new,
};
static PyObject *py_bind_time_features_syntax_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
const char *kwnames[] = {
"features", NULL
};
unsigned long long features = 0;
struct ndr_syntax_id syntax;
PyObject *args2 = Py_None;
PyObject *kwargs2 = Py_None;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "K:features", discard_const_p(char *, kwnames), &features)) {
return NULL;
}
args2 = Py_BuildValue("()");
if (args2 == NULL) {
return NULL;
}
kwargs2 = Py_BuildValue("{}");
if (kwargs2 == NULL) {
Py_DECREF(args2);
return NULL;
}
syntax = dcerpc_construct_bind_time_features(features);
return py_dcerpc_syntax_init_helper(type, args2, kwargs2, &syntax);
}
static PyTypeObject py_bind_time_features_syntax_SyntaxType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "base.bind_time_features_syntax",
.tp_doc = "bind_time_features_syntax(features)\n",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_new = py_bind_time_features_syntax_new,
};
struct py_dcerpc_ndr_pointer {
PyObject *value;
};
static void py_dcerpc_ndr_pointer_dealloc(PyObject* self)
{
struct py_dcerpc_ndr_pointer *obj =
pytalloc_get_type(self, struct py_dcerpc_ndr_pointer);
Py_CLEAR(obj->value);
self->ob_type->tp_free(self);
}
static PyObject *py_dcerpc_ndr_pointer_get_value(PyObject *self, void *closure)
{
struct py_dcerpc_ndr_pointer *obj =
pytalloc_get_type(self, struct py_dcerpc_ndr_pointer);
Py_INCREF(obj->value);
return obj->value;
}
static int py_dcerpc_ndr_pointer_set_value(PyObject *self, PyObject *value, void *closure)
{
struct py_dcerpc_ndr_pointer *obj =
pytalloc_get_type(self, struct py_dcerpc_ndr_pointer);
Py_CLEAR(obj->value);
obj->value = value;
Py_INCREF(obj->value);
return 0;
}
static PyGetSetDef py_dcerpc_ndr_pointer_getsetters[] = {
{
.name = discard_const_p(char, "value"),
.get = py_dcerpc_ndr_pointer_get_value,
.set = py_dcerpc_ndr_pointer_set_value,
.doc = discard_const_p(char, "the value store by the pointer"),
},
{
.name = NULL,
},
};
static PyObject *py_dcerpc_ndr_pointer_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
PyObject *ret = NULL;
struct py_dcerpc_ndr_pointer *obj = NULL;
const char *kwnames[] = { "value", NULL };
PyObject *value = NULL;
bool ok;
ok = PyArg_ParseTupleAndKeywords(args, kwargs, "O:value",
discard_const_p(char *, kwnames),
&value);
if (!ok) {
return NULL;
}
ret = pytalloc_new(struct py_dcerpc_ndr_pointer, type);
if (ret == NULL) {
return NULL;
}
obj = pytalloc_get_type(ret, struct py_dcerpc_ndr_pointer);
*obj = (struct py_dcerpc_ndr_pointer) {
.value = value,
};
Py_INCREF(obj->value);
return ret;
}
static PyTypeObject py_dcerpc_ndr_pointer_type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "base.ndr_pointer",
.tp_dealloc = py_dcerpc_ndr_pointer_dealloc,
.tp_getset = py_dcerpc_ndr_pointer_getsetters,
.tp_doc = "ndr_pointer(value)\n",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_new = py_dcerpc_ndr_pointer_new,
};
static struct PyModuleDef moduledef = {
PyModuleDef_HEAD_INIT,
.m_name = "base",
.m_doc = "DCE/RPC protocol implementation",
.m_size = -1,
};
MODULE_INIT_FUNC(base)
{
PyObject *m;
PyObject *dep_talloc;
PyObject *dep_samba_dcerpc_misc;
dep_talloc = PyImport_ImportModule("talloc");
if (dep_talloc == NULL)
return NULL;
BaseObject_Type = (PyTypeObject *)PyObject_GetAttrString(dep_talloc, "BaseObject");
if (BaseObject_Type == NULL) {
Py_CLEAR(dep_talloc);
return NULL;
}
Py_CLEAR(dep_talloc);
dep_samba_dcerpc_misc = PyImport_ImportModule("samba.dcerpc.misc");
if (dep_samba_dcerpc_misc == NULL) {
return NULL;
}
ndr_syntax_id_Type = (PyTypeObject *)PyObject_GetAttrString(dep_samba_dcerpc_misc, "ndr_syntax_id");
Py_CLEAR(dep_samba_dcerpc_misc);
if (ndr_syntax_id_Type == NULL) {
return NULL;
}
py_transfer_syntax_ndr_SyntaxType.tp_base = ndr_syntax_id_Type;
py_transfer_syntax_ndr_SyntaxType.tp_basicsize = pytalloc_BaseObject_size();
py_transfer_syntax_ndr64_SyntaxType.tp_base = ndr_syntax_id_Type;
py_transfer_syntax_ndr64_SyntaxType.tp_basicsize = pytalloc_BaseObject_size();
py_bind_time_features_syntax_SyntaxType.tp_base = ndr_syntax_id_Type;
py_bind_time_features_syntax_SyntaxType.tp_basicsize = pytalloc_BaseObject_size();
py_dcerpc_ndr_pointer_type.tp_base = BaseObject_Type;
py_dcerpc_ndr_pointer_type.tp_basicsize = pytalloc_BaseObject_size();
if (PyType_Ready(&dcerpc_InterfaceType) < 0) {
return NULL;
}
if (PyType_Ready(&py_transfer_syntax_ndr_SyntaxType) < 0) {
return NULL;
}
if (PyType_Ready(&py_transfer_syntax_ndr64_SyntaxType) < 0) {
return NULL;
}
if (PyType_Ready(&py_bind_time_features_syntax_SyntaxType) < 0) {
return NULL;
}
if (PyType_Ready(&py_dcerpc_ndr_pointer_type) < 0) {
return NULL;
}
m = PyModule_Create(&moduledef);
if (m == NULL) {
return NULL;
}
Py_INCREF((PyObject *)&dcerpc_InterfaceType);
PyModule_AddObject(m, "ClientConnection", (PyObject *)&dcerpc_InterfaceType);
Py_INCREF((PyObject *)(void *)&py_transfer_syntax_ndr_SyntaxType);
PyModule_AddObject(m, "transfer_syntax_ndr", (PyObject *)(void *)&py_transfer_syntax_ndr_SyntaxType);
Py_INCREF((PyObject *)(void *)&py_transfer_syntax_ndr64_SyntaxType);
PyModule_AddObject(m, "transfer_syntax_ndr64", (PyObject *)(void *)&py_transfer_syntax_ndr64_SyntaxType);
Py_INCREF((PyObject *)(void *)&py_bind_time_features_syntax_SyntaxType);
PyModule_AddObject(m, "bind_time_features_syntax", (PyObject *)(void *)&py_bind_time_features_syntax_SyntaxType);
Py_INCREF((PyObject *)(void *)&py_dcerpc_ndr_pointer_type);
PyModule_AddObject(m, "ndr_pointer", (PyObject *)(void *)&py_dcerpc_ndr_pointer_type);
return m;
}