source4/libnet/py_net.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008-2010
   5    Copyright (C) Kamen Mazdrashki <kamen.mazdrashki@postpath.com> 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include <Python.h>
  22 #include "includes.h"
  23 #include "libnet.h"
  24 #include "auth/credentials/pycredentials.h"
  25 #include "libcli/security/security.h"
  26 #include "lib/events/events.h"
  27 #include "param/param.h"
  28 #include "param/pyparam.h"
  29 #include "lib/ldb/pyldb.h"
  30 #include "auth/gensec/gensec.h"
  31 #include "librpc/rpc/pyrpc.h"
  32 #include "librpc/rpc/pyrpc_util.h"
  33
  34 typedef struct {
  35         PyObject_HEAD
  36         TALLOC_CTX *mem_ctx;
  37         struct libnet_context *libnet_ctx;
  38         struct tevent_context *ev;
  39 } py_net_Object;
  40
  41 static PyObject *py_net_join(py_net_Object *self, PyObject *args, PyObject *kwargs)
  42 {
  43         struct libnet_Join r;
  44         NTSTATUS status;
  45         PyObject *result;
  46         TALLOC_CTX *mem_ctx;
  47         const char *kwnames[] = { "domain_name", "netbios_name", "join_type", "level", NULL };
  48
  49         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssii:Join", discard_const_p(char *, kwnames),
  50                                          &r.in.domain_name, &r.in.netbios_name,
  51                                          &r.in.join_type, &r.in.level))
  52                 return NULL;
  53
  54         mem_ctx = talloc_new(self->mem_ctx);
  55
  56         status = libnet_Join(self->libnet_ctx, mem_ctx, &r);
  57         if (NT_STATUS_IS_ERR(status)) {
  58                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
  59                 talloc_free(mem_ctx);
  60                 return NULL;
  61         }
  62
  63         result = Py_BuildValue("sss", r.out.join_password,
  64                                dom_sid_string(mem_ctx, r.out.domain_sid),
  65                                r.out.domain_name);
  66
  67         talloc_free(mem_ctx);
  68
  69         return result;
  70 }
  71
  72 static const char py_net_join_doc[] = "join(domain_name, netbios_name, join_type, level) -> (join_password, domain_sid, domain_name)\n\n" \
  73 "Join the domain with the specified name.";
  74
  75 static PyObject *py_net_set_password(py_net_Object *self, PyObject *args, PyObject *kwargs)
  76 {
  77         union libnet_SetPassword r;
  78         NTSTATUS status;
  79         PyObject *py_creds;
  80         TALLOC_CTX *mem_ctx;
  81         struct tevent_context *ev;
  82         const char *kwnames[] = { "account_name", "domain_name", "newpassword", "credentials", NULL };
  83
  84         r.generic.level = LIBNET_SET_PASSWORD_GENERIC;
  85
  86         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sssO:set_password", discard_const_p(char *, kwnames),
  87                                          &r.generic.in.account_name, &r.generic.in.domain_name,
  88                                          &r.generic.in.newpassword, &py_creds)) {
  89                 return NULL;
  90         }
  91
  92         /* FIXME: we really need to get a context from the caller or we may end
  93          * up with 2 event contexts */
  94         ev = s4_event_context_init(NULL);
  95         mem_ctx = talloc_new(ev);
  96
  97         status = libnet_SetPassword(self->libnet_ctx, mem_ctx, &r);
  98         if (NT_STATUS_IS_ERR(status)) {
  99                 PyErr_SetString(PyExc_RuntimeError,
 100                                 r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
 101                 talloc_free(mem_ctx);
 102                 return NULL;
 103         }
 104
 105         talloc_free(mem_ctx);
 106
 107         Py_RETURN_NONE;
 108 }
 109
 110 static const char py_net_set_password_doc[] = "set_password(account_name, domain_name, newpassword) -> True\n\n" \
 111 "Set password for a user. You must supply credential with enough rights to do this.\n\n" \
 112 "Sample usage is:\n" \
 113 "net.set_password(account_name=<account_name>,\n" \
 114 "                domain_name=domain_name,\n" \
 115 "                newpassword=new_pass)\n";
 116
 117
 118 static PyObject *py_net_export_keytab(py_net_Object *self, PyObject *args, PyObject *kwargs)
 119 {
 120         struct libnet_export_keytab r;
 121         TALLOC_CTX *mem_ctx;
 122         const char *kwnames[] = { "keytab", NULL };
 123         NTSTATUS status;
 124
 125         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:export_keytab", discard_const_p(char *, kwnames),
 126                                          &r.in.keytab_name)) {
 127                 return NULL;
 128         }
 129
 130         mem_ctx = talloc_new(self->mem_ctx);
 131
 132         status = libnet_export_keytab(self->libnet_ctx, mem_ctx, &r);
 133         if (NT_STATUS_IS_ERR(status)) {
 134                 PyErr_SetString(PyExc_RuntimeError,
 135                                 r.out.error_string?r.out.error_string:nt_errstr(status));
 136                 talloc_free(mem_ctx);
 137                 return NULL;
 138         }
 139
 140         talloc_free(mem_ctx);
 141
 142         Py_RETURN_NONE;
 143 }
 144
 145 static const char py_net_export_keytab_doc[] = "export_keytab(keytab, name)\n\n"
 146 "Export the DC keytab to a keytab file.";
 147
 148 static PyObject *py_net_time(py_net_Object *self, PyObject *args, PyObject *kwargs)
 149 {
 150         const char *kwnames[] = { "server_name", NULL };
 151         union libnet_RemoteTOD r;
 152         NTSTATUS status;
 153         TALLOC_CTX *mem_ctx;
 154         char timestr[64];
 155         PyObject *ret;
 156         struct tm *tm;
 157
 158         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s",
 159                 discard_const_p(char *, kwnames), &r.generic.in.server_name))
 160                 return NULL;
 161
 162         r.generic.level                 = LIBNET_REMOTE_TOD_GENERIC;
 163
 164         mem_ctx = talloc_new(NULL);
 165         if (mem_ctx == NULL) {
 166                 PyErr_NoMemory();
 167                 return NULL;
 168         }
 169
 170         status = libnet_RemoteTOD(self->libnet_ctx, mem_ctx, &r);
 171         if (!NT_STATUS_IS_OK(status)) {
 172                 PyErr_SetString(PyExc_RuntimeError,
 173                                 r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
 174                 talloc_free(mem_ctx);
 175                 return NULL;
 176         }
 177
 178         ZERO_STRUCT(timestr);
 179         tm = localtime(&r.generic.out.time);
 180         strftime(timestr, sizeof(timestr)-1, "%c %Z",tm);
 181
 182         ret = PyString_FromString(timestr);
 183
 184         talloc_free(mem_ctx);
 185
 186         return ret;
 187 }
 188
 189 static const char py_net_time_doc[] = "time(server_name) -> timestr\n"
 190 "Retrieve the remote time on a server";
 191
 192 static PyObject *py_net_user_create(py_net_Object *self, PyObject *args, PyObject *kwargs)
 193 {
 194         const char *kwnames[] = { "username", NULL };
 195         NTSTATUS status;
 196         TALLOC_CTX *mem_ctx;
 197         struct libnet_CreateUser r;
 198
 199         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames),
 200                                                                          &r.in.user_name))
 201                 return NULL;
 202
 203         r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
 204
 205         mem_ctx = talloc_new(NULL);
 206         if (mem_ctx == NULL) {
 207                 PyErr_NoMemory();
 208                 return NULL;
 209         }
 210
 211         status = libnet_CreateUser(self->libnet_ctx, mem_ctx, &r);
 212         if (!NT_STATUS_IS_OK(status)) {
 213                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
 214                 talloc_free(mem_ctx);
 215                 return NULL;
 216         }
 217
 218         talloc_free(mem_ctx);
 219
 220         Py_RETURN_NONE;
 221 }
 222
 223 static const char py_net_create_user_doc[] = "create_user(username)\n"
 224 "Create a new user.";
 225
 226 static PyObject *py_net_user_delete(py_net_Object *self, PyObject *args, PyObject *kwargs)
 227 {
 228         const char *kwnames[] = { "username", NULL };
 229         NTSTATUS status;
 230         TALLOC_CTX *mem_ctx;
 231         struct libnet_DeleteUser r;
 232
 233         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames),
 234                                                                          &r.in.user_name))
 235                 return NULL;
 236
 237         r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
 238
 239         mem_ctx = talloc_new(NULL);
 240         if (mem_ctx == NULL) {
 241                 PyErr_NoMemory();
 242                 return NULL;
 243         }
 244
 245         status = libnet_DeleteUser(self->libnet_ctx, mem_ctx, &r);
 246         if (!NT_STATUS_IS_OK(status)) {
 247                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
 248                 talloc_free(mem_ctx);
 249                 return NULL;
 250         }
 251
 252         talloc_free(mem_ctx);
 253
 254         Py_RETURN_NONE;
 255 }
 256
 257 static const char py_net_delete_user_doc[] = "delete_user(username)\n"
 258 "Delete a user.";
 259
 260 static PyObject *py_dom_sid_FromSid(struct dom_sid *sid)
 261 {
 262         PyObject *mod_security, *dom_sid_Type;
 263
 264         mod_security = PyImport_ImportModule("samba.dcerpc.security");
 265         if (mod_security == NULL)
 266                 return NULL;
 267
 268         dom_sid_Type = PyObject_GetAttrString(mod_security, "dom_sid");
 269         if (dom_sid_Type == NULL)
 270                 return NULL;
 271
 272         return py_talloc_reference((PyTypeObject *)dom_sid_Type, sid);
 273 }
 274
 275 static PyObject *py_net_vampire(py_net_Object *self, PyObject *args, PyObject *kwargs)
 276 {
 277         const char *kwnames[] = { "domain", "target_dir", NULL };
 278         NTSTATUS status;
 279         TALLOC_CTX *mem_ctx;
 280         PyObject *ret;
 281         struct libnet_Vampire r;
 282
 283         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|z", discard_const_p(char *, kwnames),
 284                                          &r.in.domain_name, &r.in.targetdir)) {
 285                 return NULL;
 286         }
 287
 288         r.in.netbios_name  = lpcfg_netbios_name(self->libnet_ctx->lp_ctx);
 289         r.out.error_string = NULL;
 290
 291         mem_ctx = talloc_new(NULL);
 292         if (mem_ctx == NULL) {
 293                 PyErr_NoMemory();
 294                 return NULL;
 295         }
 296
 297         status = libnet_Vampire(self->libnet_ctx, mem_ctx, &r);
 298
 299         if (!NT_STATUS_IS_OK(status)) {
 300                 PyErr_SetString(PyExc_RuntimeError,
 301                                 r.out.error_string ? r.out.error_string : nt_errstr(status));
 302                 talloc_free(mem_ctx);
 303                 return NULL;
 304         }
 305
 306         ret = Py_BuildValue("(sO)", r.out.domain_name, py_dom_sid_FromSid(r.out.domain_sid));
 307
 308         talloc_free(mem_ctx);
 309
 310         return ret;
 311 }
 312
 313 struct replicate_state {
 314         void *vampire_state;
 315         dcerpc_InterfaceObject *drs_pipe;
 316         struct libnet_BecomeDC_StoreChunk chunk;
 317         DATA_BLOB gensec_skey;
 318         struct libnet_BecomeDC_Partition partition;
 319         struct libnet_BecomeDC_Forest forest;
 320         struct libnet_BecomeDC_DestDSA dest_dsa;
 321 };
 322
 323 /*
 324   setup for replicate_chunk() calls
 325  */
 326 static PyObject *py_net_replicate_init(py_net_Object *self, PyObject *args, PyObject *kwargs)
 327 {
 328         const char *kwnames[] = { "samdb", "lp", "drspipe", NULL };
 329         PyObject *py_ldb, *py_lp, *py_drspipe;
 330         struct ldb_context *samdb;
 331         struct loadparm_context *lp;
 332         struct replicate_state *s;
 333         NTSTATUS status;
 334
 335         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OOO",
 336                                          discard_const_p(char *, kwnames),
 337                                          &py_ldb, &py_lp, &py_drspipe)) {
 338                 return NULL;
 339         }
 340
 341         s = talloc_zero(NULL, struct replicate_state);
 342         if (!s) return NULL;
 343
 344         lp = lpcfg_from_py_object(s, py_lp);
 345         if (lp == NULL) {
 346                 PyErr_SetString(PyExc_TypeError, "Expected lp object");
 347                 talloc_free(s);
 348                 return NULL;
 349         }
 350
 351         samdb = PyLdb_AsLdbContext(py_ldb);
 352         if (samdb == NULL) {
 353                 PyErr_SetString(PyExc_TypeError, "Expected ldb object");
 354                 talloc_free(s);
 355                 return NULL;
 356         }
 357
 358         s->drs_pipe = (dcerpc_InterfaceObject *)(py_drspipe);
 359
 360         s->vampire_state = libnet_vampire_replicate_init(s, samdb, lp);
 361         if (s->vampire_state == NULL) {
 362                 PyErr_SetString(PyExc_TypeError, "Failed to initialise vampire_state");
 363                 talloc_free(s);
 364                 return NULL;
 365         }
 366
 367         status = gensec_session_key(s->drs_pipe->pipe->conn->security_state.generic_state,
 368                                     &s->gensec_skey);
 369         if (!NT_STATUS_IS_OK(status)) {
 370                 PyErr_Format(PyExc_RuntimeError, "Unable to get session key from drspipe: %s",
 371                              nt_errstr(status));
 372                 talloc_free(s);
 373                 return NULL;
 374         }
 375
 376         s->chunk.gensec_skey = &s->gensec_skey;
 377         s->chunk.partition = &s->partition;
 378         s->chunk.forest = &s->forest;
 379         s->chunk.dest_dsa = &s->dest_dsa;
 380
 381         return PyCObject_FromTallocPtr(s);
 382 }
 383
 384
 385 /*
 386   process one replication chunk
 387  */
 388 static PyObject *py_net_replicate_chunk(py_net_Object *self, PyObject *args, PyObject *kwargs)
 389 {
 390         const char *kwnames[] = { "state", "level", "ctr", "schema", NULL };
 391         PyObject *py_state, *py_ctr, *py_schema;
 392         struct replicate_state *s;
 393         unsigned level;
 394         NTSTATUS (*chunk_handler)(void *private_data, const struct libnet_BecomeDC_StoreChunk *c);
 395         NTSTATUS status;
 396
 397         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OIO|O",
 398                                          discard_const_p(char *, kwnames),
 399                                          &py_state, &level, &py_ctr, &py_schema)) {
 400                 return NULL;
 401         }
 402
 403         s = talloc_get_type(PyCObject_AsVoidPtr(py_state), struct replicate_state);
 404         if (!s) {
 405                 PyErr_SetString(PyExc_TypeError, "Expected replication_state");
 406                 return NULL;
 407         }
 408
 409         switch (level) {
 410         case 1:
 411                 if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr1")) {
 412                         return NULL;
 413                 }
 414                 s->chunk.ctr1                         = py_talloc_get_ptr(py_ctr);
 415                 s->partition.nc                       = *s->chunk.ctr1->naming_context;
 416                 s->partition.more_data                = s->chunk.ctr1->more_data;
 417                 s->partition.source_dsa_guid          = s->chunk.ctr1->source_dsa_guid;
 418                 s->partition.source_dsa_invocation_id = s->chunk.ctr1->source_dsa_invocation_id;
 419                 s->partition.highwatermark            = s->chunk.ctr1->new_highwatermark;
 420                 break;
 421         case 6:
 422                 if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr6")) {
 423                         return NULL;
 424                 }
 425                 s->chunk.ctr6                         = py_talloc_get_ptr(py_ctr);
 426                 s->partition.nc                       = *s->chunk.ctr6->naming_context;
 427                 s->partition.more_data                = s->chunk.ctr6->more_data;
 428                 s->partition.source_dsa_guid          = s->chunk.ctr6->source_dsa_guid;
 429                 s->partition.source_dsa_invocation_id = s->chunk.ctr6->source_dsa_invocation_id;
 430                 s->partition.highwatermark            = s->chunk.ctr6->new_highwatermark;
 431                 break;
 432         default:
 433                 PyErr_Format(PyExc_TypeError, "Bad level %u in replicate_chunk", level);
 434                 return NULL;
 435         }
 436
 437         chunk_handler = libnet_vampire_cb_store_chunk;
 438         if (py_schema) {
 439                 if (!PyBool_Check(py_schema)) {
 440                         PyErr_SetString(PyExc_TypeError, "Expected boolean schema");
 441                         return NULL;
 442                 }
 443                 if (py_schema == Py_True) {
 444                         chunk_handler = libnet_vampire_cb_schema_chunk;
 445                 }
 446         }
 447
 448         s->chunk.ctr_level = level;
 449
 450         status = chunk_handler(s->vampire_state, &s->chunk);
 451         if (!NT_STATUS_IS_OK(status)) {
 452                 PyErr_Format(PyExc_TypeError, "Failed to process chunk: %s", nt_errstr(status));
 453                 return NULL;
 454         }
 455
 456         return Py_None;
 457 }
 458
 459 static const char py_net_vampire_doc[] = "vampire(domain, target_dir=None)\n"
 460                                          "Vampire a domain.";
 461
 462 static const char py_net_replicate_init_doc[] = "replicate_init(samdb, lp, drspipe)\n"
 463                                          "Setup for replicate_chunk calls.";
 464
 465 static const char py_net_replicate_chunk_doc[] = "replicate_chunk(state, level, ctr, schema)\n"
 466                                          "Process replication for one chunk";
 467
 468 static PyMethodDef net_obj_methods[] = {
 469         {"join", (PyCFunction)py_net_join, METH_VARARGS|METH_KEYWORDS, py_net_join_doc},
 470         {"set_password", (PyCFunction)py_net_set_password, METH_VARARGS|METH_KEYWORDS, py_net_set_password_doc},
 471         {"export_keytab", (PyCFunction)py_net_export_keytab, METH_VARARGS|METH_KEYWORDS, py_net_export_keytab_doc},
 472         {"time", (PyCFunction)py_net_time, METH_VARARGS|METH_KEYWORDS, py_net_time_doc},
 473         {"create_user", (PyCFunction)py_net_user_create, METH_VARARGS|METH_KEYWORDS, py_net_create_user_doc},
 474         {"delete_user", (PyCFunction)py_net_user_delete, METH_VARARGS|METH_KEYWORDS, py_net_delete_user_doc},
 475         {"vampire", (PyCFunction)py_net_vampire, METH_VARARGS|METH_KEYWORDS, py_net_vampire_doc},
 476         {"replicate_init", (PyCFunction)py_net_replicate_init, METH_VARARGS|METH_KEYWORDS, py_net_replicate_init_doc},
 477         {"replicate_chunk", (PyCFunction)py_net_replicate_chunk, METH_VARARGS|METH_KEYWORDS, py_net_replicate_chunk_doc},
 478         { NULL }
 479 };
 480
 481 static void py_net_dealloc(py_net_Object *self)
 482 {
 483         talloc_free(self->mem_ctx);
 484 }
 485
 486 static PyObject *net_obj_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 487 {
 488         PyObject *py_creds, *py_lp = Py_None;
 489         const char *kwnames[] = { "creds", "lp", NULL };
 490         py_net_Object *ret;
 491         struct loadparm_context *lp;
 492
 493         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|O",
 494                         discard_const_p(char *, kwnames), &py_creds, &py_lp))
 495                 return NULL;
 496
 497         ret = PyObject_New(py_net_Object, type);
 498         if (ret == NULL) {
 499                 return NULL;
 500         }
 501
 502         /* FIXME: we really need to get a context from the caller or we may end
 503          * up with 2 event contexts */
 504         ret->ev = s4_event_context_init(NULL);
 505         ret->mem_ctx = talloc_new(ret->ev);
 506
 507         lp = lpcfg_from_py_object(ret->mem_ctx, py_lp);
 508         if (lp == NULL) {
 509                 Py_DECREF(ret);
 510                 return NULL;
 511         }
 512
 513         ret->libnet_ctx = libnet_context_init(ret->ev, lp);
 514         if (ret->libnet_ctx == NULL) {
 515                 PyErr_SetString(PyExc_RuntimeError, "Unable to initialize net");
 516                 Py_DECREF(ret);
 517                 return NULL;
 518         }
 519
 520         ret->libnet_ctx->cred = cli_credentials_from_py_object(py_creds);
 521         if (ret->libnet_ctx->cred == NULL) {
 522                 PyErr_SetString(PyExc_TypeError, "Expected credentials object");
 523                 Py_DECREF(ret);
 524                 return NULL;
 525         }
 526
 527         return (PyObject *)ret;
 528 }
 529
 530
 531 PyTypeObject py_net_Type = {
 532         PyObject_HEAD_INIT(NULL) 0,
 533         .tp_name = "net.Net",
 534         .tp_basicsize = sizeof(py_net_Object),
 535         .tp_dealloc = (destructor)py_net_dealloc,
 536         .tp_methods = net_obj_methods,
 537         .tp_new = net_obj_new,
 538 };
 539
 540 void initnet(void)
 541 {
 542         PyObject *m;
 543
 544         if (PyType_Ready(&py_net_Type) < 0)
 545                 return;
 546
 547         m = Py_InitModule3("net", NULL, NULL);
 548         if (m == NULL)
 549                 return;
 550
 551         Py_INCREF(&py_net_Type);
 552         PyModule_AddObject(m, "Net", (PyObject *)&py_net_Type);
 553         PyModule_AddObject(m, "LIBNET_JOINDOMAIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOINDOMAIN_AUTOMATIC));
 554         PyModule_AddObject(m, "LIBNET_JOINDOMAIN_SPECIFIED", PyInt_FromLong(LIBNET_JOINDOMAIN_SPECIFIED));
 555         PyModule_AddObject(m, "LIBNET_JOIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOIN_AUTOMATIC));
 556         PyModule_AddObject(m, "LIBNET_JOIN_SPECIFIED", PyInt_FromLong(LIBNET_JOIN_SPECIFIED));
 557 }