source: vendor/current/source4/librpc/rpc/pyrpc.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 13.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include <Python.h>
21#include "includes.h"
22#include <structmember.h>
23#include "librpc/rpc/pyrpc.h"
24#include "lib/events/events.h"
25#include "param/pyparam.h"
26#include "librpc/rpc/dcerpc.h"
27#include "librpc/rpc/pyrpc_util.h"
28#include "auth/credentials/pycredentials.h"
29#include "auth/gensec/gensec.h"
30
31void initbase(void);
32
33static PyTypeObject dcerpc_InterfaceType;
34
35static PyTypeObject *ndr_syntax_id_Type;
36
37static bool PyString_AsGUID(PyObject *object, struct GUID *uuid)
38{
39 NTSTATUS status;
40 status = GUID_from_string(PyString_AsString(object), uuid);
41 if (NT_STATUS_IS_ERR(status)) {
42 PyErr_SetNTSTATUS(status);
43 return false;
44 }
45 return true;
46}
47
48static bool ndr_syntax_from_py_object(PyObject *object, struct ndr_syntax_id *syntax_id)
49{
50 ZERO_STRUCTP(syntax_id);
51
52 if (PyString_Check(object)) {
53 return PyString_AsGUID(object, &syntax_id->uuid);
54 } else if (PyTuple_Check(object)) {
55 if (PyTuple_Size(object) < 1 || PyTuple_Size(object) > 2) {
56 PyErr_SetString(PyExc_ValueError, "Syntax ID tuple has invalid size");
57 return false;
58 }
59
60 if (!PyString_Check(PyTuple_GetItem(object, 0))) {
61 PyErr_SetString(PyExc_ValueError, "Expected GUID as first element in tuple");
62 return false;
63 }
64
65 if (!PyString_AsGUID(PyTuple_GetItem(object, 0), &syntax_id->uuid))
66 return false;
67
68 if (!PyInt_Check(PyTuple_GetItem(object, 1))) {
69 PyErr_SetString(PyExc_ValueError, "Expected version as second element in tuple");
70 return false;
71 }
72
73 syntax_id->if_version = PyInt_AsLong(PyTuple_GetItem(object, 1));
74 return true;
75 }
76
77 PyErr_SetString(PyExc_TypeError, "Expected UUID or syntax id tuple");
78 return false;
79}
80
81static PyObject *py_iface_server_name(PyObject *obj, void *closure)
82{
83 const char *server_name;
84 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
85
86 server_name = dcerpc_server_name(iface->pipe);
87 if (server_name == NULL)
88 Py_RETURN_NONE;
89
90 return PyString_FromString(server_name);
91}
92
93static PyObject *py_ndr_syntax_id(struct ndr_syntax_id *syntax_id)
94{
95 PyObject *ret;
96 char *uuid_str;
97
98 uuid_str = GUID_string(NULL, &syntax_id->uuid);
99 if (uuid_str == NULL)
100 return NULL;
101
102 ret = Py_BuildValue("(s,i)", uuid_str, syntax_id->if_version);
103
104 talloc_free(uuid_str);
105
106 return ret;
107}
108
109static PyObject *py_iface_abstract_syntax(PyObject *obj, void *closure)
110{
111 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
112
113 return py_ndr_syntax_id(&iface->pipe->syntax);
114}
115
116static PyObject *py_iface_transfer_syntax(PyObject *obj, void *closure)
117{
118 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
119
120 return py_ndr_syntax_id(&iface->pipe->transfer_syntax);
121}
122
123static PyObject *py_iface_session_key(PyObject *obj, void *closure)
124{
125 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
126 DATA_BLOB session_key;
127
128 NTSTATUS status = dcerpc_fetch_session_key(iface->pipe, &session_key);
129 PyErr_NTSTATUS_IS_ERR_RAISE(status);
130
131 return PyString_FromStringAndSize((const char *)session_key.data, session_key.length);
132}
133
134static PyObject *py_iface_user_session_key(PyObject *obj, void *closure)
135{
136 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
137 TALLOC_CTX *mem_ctx;
138 NTSTATUS status;
139 struct gensec_security *security = NULL;
140 DATA_BLOB session_key = data_blob_null;
141 static PyObject *session_key_obj = NULL;
142
143 if (iface->pipe == NULL) {
144 PyErr_SetNTSTATUS(NT_STATUS_NO_USER_SESSION_KEY);
145 return NULL;
146 }
147
148 if (iface->pipe->conn == NULL) {
149 PyErr_SetNTSTATUS(NT_STATUS_NO_USER_SESSION_KEY);
150 return NULL;
151 }
152
153 if (iface->pipe->conn->security_state.generic_state == NULL) {
154 PyErr_SetNTSTATUS(NT_STATUS_NO_USER_SESSION_KEY);
155 return NULL;
156 }
157
158 security = iface->pipe->conn->security_state.generic_state;
159
160 mem_ctx = talloc_new(NULL);
161
162 status = gensec_session_key(security, mem_ctx, &session_key);
163 if (!NT_STATUS_IS_OK(status)) {
164 talloc_free(mem_ctx);
165 PyErr_SetNTSTATUS(status);
166 return NULL;
167 }
168
169 session_key_obj = PyString_FromStringAndSize((const char *)session_key.data,
170 session_key.length);
171 talloc_free(mem_ctx);
172 return session_key_obj;
173}
174
175static PyGetSetDef dcerpc_interface_getsetters[] = {
176 { discard_const_p(char, "server_name"), py_iface_server_name, NULL,
177 discard_const_p(char, "name of the server, if connected over SMB") },
178 { discard_const_p(char, "abstract_syntax"), py_iface_abstract_syntax, NULL,
179 discard_const_p(char, "syntax id of the abstract syntax") },
180 { discard_const_p(char, "transfer_syntax"), py_iface_transfer_syntax, NULL,
181 discard_const_p(char, "syntax id of the transfersyntax") },
182 { discard_const_p(char, "session_key"), py_iface_session_key, NULL,
183 discard_const_p(char, "session key (as used for blob encryption on LSA and SAMR)") },
184 { discard_const_p(char, "user_session_key"), py_iface_user_session_key, NULL,
185 discard_const_p(char, "user_session key (as used for blob encryption on DRSUAPI)") },
186 { NULL }
187};
188
189static PyMemberDef dcerpc_interface_members[] = {
190 { discard_const_p(char, "request_timeout"), T_INT,
191 offsetof(struct dcerpc_pipe, request_timeout), 0,
192 discard_const_p(char, "request timeout, in seconds") },
193 { NULL }
194};
195
196static PyObject *py_iface_request(PyObject *self, PyObject *args, PyObject *kwargs)
197{
198 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
199 int opnum;
200 DATA_BLOB data_in, data_out;
201 NTSTATUS status;
202 char *in_data;
203 Py_ssize_t in_length;
204 PyObject *ret;
205 PyObject *object = NULL;
206 struct GUID object_guid;
207 TALLOC_CTX *mem_ctx = talloc_new(NULL);
208 uint32_t out_flags = 0;
209 const char *kwnames[] = { "opnum", "data", "object", NULL };
210
211 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "is#|O:request",
212 discard_const_p(char *, kwnames), &opnum, &in_data, &in_length, &object)) {
213 talloc_free(mem_ctx);
214 return NULL;
215 }
216
217 data_in.data = (uint8_t *)talloc_memdup(mem_ctx, in_data, in_length);
218 data_in.length = in_length;
219
220 ZERO_STRUCT(data_out);
221
222 if (object != NULL && !PyString_AsGUID(object, &object_guid)) {
223 talloc_free(mem_ctx);
224 return NULL;
225 }
226
227 status = dcerpc_binding_handle_raw_call(iface->binding_handle,
228 object?&object_guid:NULL,
229 opnum,
230 0, /* in_flags */
231 data_in.data,
232 data_in.length,
233 mem_ctx,
234 &data_out.data,
235 &data_out.length,
236 &out_flags);
237 if (!NT_STATUS_IS_OK(status)) {
238 PyErr_SetDCERPCStatus(iface->pipe, status);
239 talloc_free(mem_ctx);
240 return NULL;
241 }
242
243 ret = PyString_FromStringAndSize((char *)data_out.data, data_out.length);
244
245 talloc_free(mem_ctx);
246 return ret;
247}
248
249static PyMethodDef dcerpc_interface_methods[] = {
250 { "request", (PyCFunction)py_iface_request, METH_VARARGS|METH_KEYWORDS, "S.request(opnum, data, object=None) -> data\nMake a raw request" },
251 { NULL, NULL, 0, NULL },
252};
253
254static void dcerpc_interface_dealloc(PyObject* self)
255{
256 dcerpc_InterfaceObject *interface = (dcerpc_InterfaceObject *)self;
257 interface->binding_handle = NULL;
258 interface->pipe = NULL;
259 TALLOC_FREE(interface->mem_ctx);
260 self->ob_type->tp_free(self);
261}
262
263static PyObject *dcerpc_interface_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
264{
265 PyObject *ret;
266 const char *binding_string = NULL;
267 PyObject *py_lp_ctx = Py_None;
268 PyObject *py_credentials = Py_None;
269 PyObject *syntax = Py_None;
270 PyObject *py_basis = Py_None;
271 const char *kwnames[] = {
272 "binding", "syntax", "lp_ctx", "credentials", "basis_connection", NULL
273 };
274 static struct ndr_interface_table dummy_table;
275 PyObject *args2 = Py_None;
276 PyObject *kwargs2 = Py_None;
277
278 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|OOO:connect", discard_const_p(char *, kwnames), &binding_string, &syntax, &py_lp_ctx, &py_credentials, &py_basis)) {
279 return NULL;
280 }
281
282 if (strncmp(binding_string, "irpc:", 5) == 0) {
283 PyErr_SetString(PyExc_ValueError, "irpc: transport not supported");
284 return NULL;
285 }
286
287 /*
288 * Fill a dummy interface table struct. TODO: In the future, we should
289 * rather just allow connecting without requiring an interface table.
290 *
291 * We just fill the syntax during the connect, but keep the memory valid
292 * the whole time.
293 */
294 if (!ndr_syntax_from_py_object(syntax, &dummy_table.syntax_id)) {
295 return NULL;
296 }
297
298 args2 = Py_BuildValue("(s)", binding_string);
299 if (args2 == NULL) {
300 return NULL;
301 }
302
303 kwargs2 = Py_BuildValue("{s:O,s:O,s:O}",
304 "lp_ctx", py_lp_ctx,
305 "credentials", py_credentials,
306 "basis_connection", py_basis);
307 if (kwargs2 == NULL) {
308 Py_DECREF(args2);
309 return NULL;
310 }
311
312 ret = py_dcerpc_interface_init_helper(type, args2, kwargs2, &dummy_table);
313 ZERO_STRUCT(dummy_table.syntax_id);
314 Py_DECREF(args2);
315 Py_DECREF(kwargs2);
316 return ret;
317}
318
319static PyTypeObject dcerpc_InterfaceType = {
320 PyObject_HEAD_INIT(NULL) 0,
321 .tp_name = "dcerpc.ClientConnection",
322 .tp_basicsize = sizeof(dcerpc_InterfaceObject),
323 .tp_dealloc = dcerpc_interface_dealloc,
324 .tp_getset = dcerpc_interface_getsetters,
325 .tp_members = dcerpc_interface_members,
326 .tp_methods = dcerpc_interface_methods,
327 .tp_doc = "ClientConnection(binding, syntax, lp_ctx=None, credentials=None) -> connection\n"
328"\n"
329"binding should be a DCE/RPC binding string (for example: ncacn_ip_tcp:127.0.0.1)\n"
330"syntax should be a tuple with a GUID and version number of an interface\n"
331"lp_ctx should be a path to a smb.conf file or a param.LoadParm object\n"
332"credentials should be a credentials.Credentials object.\n\n",
333 .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
334 .tp_new = dcerpc_interface_new,
335};
336
337static PyObject *py_transfer_syntax_ndr_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
338{
339 return py_dcerpc_syntax_init_helper(type, args, kwargs, &ndr_transfer_syntax_ndr);
340}
341
342static PyTypeObject py_transfer_syntax_ndr_SyntaxType = {
343 PyObject_HEAD_INIT(NULL) 0,
344 .tp_name = "base.transfer_syntax_ndr",
345 .tp_doc = "transfer_syntax_ndr()\n",
346 .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
347 .tp_new = py_transfer_syntax_ndr_new,
348};
349
350static PyObject *py_transfer_syntax_ndr64_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
351{
352 return py_dcerpc_syntax_init_helper(type, args, kwargs, &ndr_transfer_syntax_ndr64);
353}
354
355static PyTypeObject py_transfer_syntax_ndr64_SyntaxType = {
356 PyObject_HEAD_INIT(NULL) 0,
357 .tp_name = "base.transfer_syntax_ndr64",
358 .tp_doc = "transfer_syntax_ndr64()\n",
359 .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
360 .tp_new = py_transfer_syntax_ndr64_new,
361};
362
363static PyObject *py_bind_time_features_syntax_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
364{
365 const char *kwnames[] = {
366 "features", NULL
367 };
368 unsigned long long features = 0;
369 struct ndr_syntax_id syntax;
370 PyObject *args2 = Py_None;
371 PyObject *kwargs2 = Py_None;
372
373 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "K:features", discard_const_p(char *, kwnames), &features)) {
374 return NULL;
375 }
376
377 args2 = Py_BuildValue("()");
378 if (args2 == NULL) {
379 return NULL;
380 }
381
382 kwargs2 = Py_BuildValue("{}");
383 if (kwargs2 == NULL) {
384 Py_DECREF(args2);
385 return NULL;
386 }
387
388 syntax = dcerpc_construct_bind_time_features(features);
389
390 return py_dcerpc_syntax_init_helper(type, args2, kwargs2, &syntax);
391}
392
393static PyTypeObject py_bind_time_features_syntax_SyntaxType = {
394 PyObject_HEAD_INIT(NULL) 0,
395 .tp_name = "base.bind_time_features_syntax",
396 .tp_doc = "bind_time_features_syntax(features)\n",
397 .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
398 .tp_new = py_bind_time_features_syntax_new,
399};
400
401void initbase(void)
402{
403 PyObject *m;
404 PyObject *dep_samba_dcerpc_misc;
405
406 dep_samba_dcerpc_misc = PyImport_ImportModule("samba.dcerpc.misc");
407 if (dep_samba_dcerpc_misc == NULL)
408 return;
409
410 ndr_syntax_id_Type = (PyTypeObject *)PyObject_GetAttrString(dep_samba_dcerpc_misc, "ndr_syntax_id");
411 if (ndr_syntax_id_Type == NULL)
412 return;
413
414 py_transfer_syntax_ndr_SyntaxType.tp_base = ndr_syntax_id_Type;
415 py_transfer_syntax_ndr_SyntaxType.tp_basicsize = pytalloc_BaseObject_size();
416 py_transfer_syntax_ndr64_SyntaxType.tp_base = ndr_syntax_id_Type;
417 py_transfer_syntax_ndr64_SyntaxType.tp_basicsize = pytalloc_BaseObject_size();
418 py_bind_time_features_syntax_SyntaxType.tp_base = ndr_syntax_id_Type;
419 py_bind_time_features_syntax_SyntaxType.tp_basicsize = pytalloc_BaseObject_size();
420
421 if (PyType_Ready(&dcerpc_InterfaceType) < 0)
422 return;
423
424 if (PyType_Ready(&py_transfer_syntax_ndr_SyntaxType) < 0)
425 return;
426 if (PyType_Ready(&py_transfer_syntax_ndr64_SyntaxType) < 0)
427 return;
428 if (PyType_Ready(&py_bind_time_features_syntax_SyntaxType) < 0)
429 return;
430
431 m = Py_InitModule3("base", NULL, "DCE/RPC protocol implementation");
432 if (m == NULL)
433 return;
434
435 Py_INCREF((PyObject *)&dcerpc_InterfaceType);
436 PyModule_AddObject(m, "ClientConnection", (PyObject *)&dcerpc_InterfaceType);
437
438 Py_INCREF((PyObject *)(void *)&py_transfer_syntax_ndr_SyntaxType);
439 PyModule_AddObject(m, "transfer_syntax_ndr", (PyObject *)(void *)&py_transfer_syntax_ndr_SyntaxType);
440 Py_INCREF((PyObject *)(void *)&py_transfer_syntax_ndr64_SyntaxType);
441 PyModule_AddObject(m, "transfer_syntax_ndr64", (PyObject *)(void *)&py_transfer_syntax_ndr64_SyntaxType);
442 Py_INCREF((PyObject *)(void *)&py_bind_time_features_syntax_SyntaxType);
443 PyModule_AddObject(m, "bind_time_features_syntax", (PyObject *)(void *)&py_bind_time_features_syntax_SyntaxType);
444}
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