source4/param/provision.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008-2009
   5    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   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 "python/py3compat.h"
  23 #include <ldb.h>
  24 #include <pyldb.h>
  25 #include "includes.h"
  26 #include "librpc/ndr/libndr.h"
  27 #include "param/provision.h"
  28 #include "param/secrets.h"
  29 #include <pytalloc.h>
  30 #include "python/modules.h"
  31 #include "param/pyparam.h"
  32 #include "dynconfig/dynconfig.h"
  33
  34 static bool dict_insert(PyObject* dict,
  35                         const char* key,
  36                         PyObject* value)
  37 {
  38         if (PyDict_SetItemString(dict, key, value) == -1) {
  39                 Py_XDECREF(value);
  40                 return false;
  41         }
  42         Py_XDECREF(value);
  43         return true;
  44 }
  45
  46 static PyObject *provision_module(void)
  47 {
  48         PyObject *name = PyStr_FromString("samba.provision");
  49         PyObject *mod = NULL;
  50         if (name == NULL)
  51                 return NULL;
  52         mod = PyImport_Import(name);
  53         Py_CLEAR(name);
  54         return mod;
  55 }
  56
  57 static PyObject *schema_module(void)
  58 {
  59         PyObject *name = PyStr_FromString("samba.schema");
  60         PyObject *mod = NULL;
  61         if (name == NULL)
  62                 return NULL;
  63         mod = PyImport_Import(name);
  64         Py_CLEAR(name);
  65         return mod;
  66 }
  67
  68 static PyObject *ldb_module(void)
  69 {
  70         PyObject *name = PyStr_FromString("ldb");
  71         PyObject *mod = NULL;
  72         if (name == NULL)
  73                 return NULL;
  74         mod = PyImport_Import(name);
  75         Py_CLEAR(name);
  76         return mod;
  77 }
  78
  79 static PyObject *PyLdb_FromLdbContext(struct ldb_context *ldb_ctx)
  80 {
  81         PyLdbObject *ret;
  82         PyObject *ldb_mod = ldb_module();
  83         PyTypeObject *ldb_ctx_type;
  84         if (ldb_mod == NULL)
  85                 return NULL;
  86
  87         ldb_ctx_type = (PyTypeObject *)PyObject_GetAttrString(ldb_mod, "Ldb");
  88
  89         ret = (PyLdbObject *)ldb_ctx_type->tp_alloc(ldb_ctx_type, 0);
  90         if (ret == NULL) {
  91                 PyErr_NoMemory();
  92                 Py_XDECREF(ldb_ctx_type);
  93                 return NULL;
  94         }
  95         ret->mem_ctx = talloc_new(NULL);
  96         ret->ldb_ctx = talloc_reference(ret->mem_ctx, ldb_ctx);
  97         Py_XDECREF(ldb_ctx_type);
  98         return (PyObject *)ret;
  99 }
 100
 101 NTSTATUS provision_bare(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx,
 102                         struct provision_settings *settings,
 103                         struct provision_result *result)
 104 {
 105         const char *configfile;
 106         PyObject *provision_mod = NULL, *provision_dict = NULL;
 107         PyObject *provision_fn = NULL, *py_result = NULL;
 108         PyObject *parameters = NULL, *py_lp_ctx = NULL, *py_domaindn = NULL;
 109
 110         struct ldb_context *samdb;
 111         NTSTATUS status = NT_STATUS_OK;
 112
 113         DEBUG(0,("Provision for Become-DC test using python\n"));
 114
 115         Py_Initialize();
 116         py_update_path(); /* Put the samba path at the start of sys.path */
 117
 118         provision_mod = provision_module();
 119
 120         if (provision_mod == NULL) {
 121                 PyErr_Print();
 122                 DEBUG(0, ("Unable to import provision Python module.\n"));
 123                 return NT_STATUS_UNSUCCESSFUL;
 124         }
 125
 126         provision_dict = PyModule_GetDict(provision_mod);
 127
 128         if (provision_dict == NULL) {
 129                 DEBUG(0, ("Unable to get dictionary for provision module\n"));
 130                 return NT_STATUS_UNSUCCESSFUL;
 131         }
 132
 133         provision_fn = PyDict_GetItemString(provision_dict, "provision_become_dc");
 134         if (provision_fn == NULL) {
 135                 PyErr_Print();
 136                 DEBUG(0, ("Unable to get provision_become_dc function\n"));
 137                 return NT_STATUS_UNSUCCESSFUL;
 138         }
 139
 140         DEBUG(0,("New Server in Site[%s]\n",
 141                  settings->site_name));
 142
 143         DEBUG(0,("DSA Instance [%s]\n"
 144                 "\tinvocationId[%s]\n",
 145                 settings->ntds_dn_str,
 146                 settings->invocation_id == NULL?"None":GUID_string(mem_ctx, settings->invocation_id)));
 147
 148         DEBUG(0,("Paths under targetdir[%s]\n",
 149                  settings->targetdir));
 150         parameters = PyDict_New();
 151
 152         configfile = lpcfg_configfile(lp_ctx);
 153         if (configfile != NULL) {
 154                 if (!dict_insert(parameters, "smbconf",
 155                                  PyStr_FromString(configfile))) {
 156                         status = NT_STATUS_UNSUCCESSFUL;
 157                         goto out;
 158                 }
 159         }
 160
 161         if (!dict_insert(parameters,
 162                          "rootdn",
 163                          PyStr_FromString(settings->root_dn_str))) {
 164                 status = NT_STATUS_UNSUCCESSFUL;
 165                 goto out;
 166         }
 167         if (settings->targetdir != NULL) {
 168                 if (!dict_insert(parameters,
 169                                  "targetdir",
 170                                  PyStr_FromString(settings->targetdir))) {
 171                         status = NT_STATUS_UNSUCCESSFUL;
 172                         goto out;
 173                 }
 174         }
 175         if (!dict_insert(parameters,
 176                          "hostname",
 177                          PyStr_FromString(settings->netbios_name))) {
 178                 status = NT_STATUS_UNSUCCESSFUL;
 179                 goto out;
 180         }
 181         if (!dict_insert(parameters,
 182                          "domain",
 183                          PyStr_FromString(settings->domain))) {
 184                 status = NT_STATUS_UNSUCCESSFUL;
 185                 goto out;
 186         }
 187         if (!dict_insert(parameters,
 188                          "realm",
 189                          PyStr_FromString(settings->realm))) {
 190                 status = NT_STATUS_UNSUCCESSFUL;
 191                 goto out;
 192         }
 193         if (settings->root_dn_str) {
 194                 if (!dict_insert(parameters,
 195                                  "rootdn",
 196                                  PyStr_FromString(settings->root_dn_str))) {
 197                         status = NT_STATUS_UNSUCCESSFUL;
 198                         goto out;
 199                 }
 200         }
 201
 202         if (settings->domain_dn_str) {
 203                 if (!dict_insert(parameters,
 204                                  "domaindn",
 205                                  PyStr_FromString(settings->domain_dn_str))) {
 206                         status = NT_STATUS_UNSUCCESSFUL;
 207                         goto out;
 208                 }
 209         }
 210
 211         if (settings->schema_dn_str) {
 212                 if (!dict_insert(parameters,
 213                                  "schemadn",
 214                                  PyStr_FromString(settings->schema_dn_str))) {
 215                         status = NT_STATUS_UNSUCCESSFUL;
 216                         goto out;
 217                 }
 218         }
 219         if (settings->config_dn_str) {
 220                 if (!dict_insert(parameters,
 221                                  "configdn",
 222                                  PyStr_FromString(settings->config_dn_str))) {
 223                         status = NT_STATUS_UNSUCCESSFUL;
 224                         goto out;
 225                 }
 226         }
 227         if (settings->server_dn_str) {
 228                 if (!dict_insert(parameters,
 229                                  "serverdn",
 230                                  PyStr_FromString(settings->server_dn_str))) {
 231                         status = NT_STATUS_UNSUCCESSFUL;
 232                         goto out;
 233                 }
 234         }
 235         if (settings->site_name) {
 236                 if (!dict_insert(parameters,
 237                                  "sitename",
 238                                   PyStr_FromString(settings->site_name))) {
 239                         status = NT_STATUS_UNSUCCESSFUL;
 240                         goto out;
 241                 }
 242         }
 243
 244         if (!dict_insert(parameters,
 245                          "machinepass",
 246                          PyStr_FromString(settings->machine_password))){
 247                 status = NT_STATUS_UNSUCCESSFUL;
 248                 goto out;
 249         }
 250
 251         if (!dict_insert(parameters,
 252                          "debuglevel",
 253                          PyInt_FromLong(DEBUGLEVEL))) {
 254                 status = NT_STATUS_UNSUCCESSFUL;
 255                 goto out;
 256         }
 257
 258         if (!dict_insert(parameters,
 259                          "use_ntvfs",
 260                          PyInt_FromLong(settings->use_ntvfs))) {
 261                 status = NT_STATUS_UNSUCCESSFUL;
 262                 goto out;
 263         }
 264
 265         py_result = PyEval_CallObjectWithKeywords(provision_fn, NULL, parameters);
 266
 267         if (py_result == NULL) {
 268                 status = NT_STATUS_UNSUCCESSFUL;
 269                 goto out;
 270         }
 271
 272         py_domaindn = PyObject_GetAttrString(py_result, "domaindn");
 273         result->domaindn = talloc_strdup(mem_ctx, PyStr_AsString(py_domaindn));
 274
 275         /* FIXME paths */
 276         py_lp_ctx = PyObject_GetAttrString(py_result, "lp");
 277         if (py_lp_ctx == NULL) {
 278                 DEBUG(0, ("Missing 'lp' attribute"));
 279                 status = NT_STATUS_UNSUCCESSFUL;
 280                 goto out;
 281         }
 282         result->lp_ctx = lpcfg_from_py_object(mem_ctx, py_lp_ctx);
 283
 284         samdb = pyldb_Ldb_AsLdbContext(PyObject_GetAttrString(py_result, "samdb"));
 285         if (samdb == NULL) {
 286                 DEBUG(0, ("Missing 'samdb' attribute"));
 287                 status = NT_STATUS_UNSUCCESSFUL;
 288                 goto out;
 289         }
 290         result->samdb = samdb;
 291         status = NT_STATUS_OK;
 292 out:
 293         Py_CLEAR(parameters);
 294         Py_CLEAR(provision_mod);
 295         Py_CLEAR(provision_fn);
 296         Py_CLEAR(provision_dict);
 297         Py_CLEAR(py_result);
 298         Py_CLEAR(py_lp_ctx);
 299         Py_CLEAR(py_domaindn);
 300         if (!NT_STATUS_IS_OK(status)) {
 301                 PyErr_Print();
 302                 PyErr_Clear();
 303         }
 304         return status;
 305 }
 306
 307 static PyObject *py_dom_sid_FromSid(struct dom_sid *sid)
 308 {
 309         PyObject *mod_security = NULL, *dom_sid_Type = NULL, *result = NULL;
 310
 311         mod_security = PyImport_ImportModule("samba.dcerpc.security");
 312         if (mod_security == NULL) {
 313                 return NULL;
 314         }
 315
 316         dom_sid_Type = PyObject_GetAttrString(mod_security, "dom_sid");
 317         if (dom_sid_Type == NULL) {
 318                 Py_DECREF(mod_security);
 319                 return NULL;
 320         }
 321
 322         result = pytalloc_reference((PyTypeObject *)dom_sid_Type, sid);
 323         Py_DECREF(mod_security);
 324         Py_DECREF(dom_sid_Type);
 325         return result;
 326 }
 327
 328 NTSTATUS provision_store_self_join(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx,
 329                                    struct tevent_context *event_ctx,
 330                                    struct provision_store_self_join_settings *settings,
 331                                    const char **error_string)
 332 {
 333         int ret;
 334         PyObject *provision_mod = NULL, *provision_dict = NULL;
 335         PyObject *provision_fn = NULL, *py_result = NULL;
 336         PyObject *parameters = NULL, *py_sid = NULL;
 337         struct ldb_context *ldb = NULL;
 338         TALLOC_CTX *tmp_mem = talloc_new(mem_ctx);
 339
 340         NTSTATUS status = NT_STATUS_OK;
 341         *error_string = NULL;
 342
 343         if (!tmp_mem) {
 344                 status = NT_STATUS_UNSUCCESSFUL;
 345                 goto out;
 346         }
 347
 348         /* Open the secrets database */
 349         ldb = secrets_db_connect(tmp_mem, lp_ctx);
 350         if (!ldb) {
 351                 *error_string
 352                         = talloc_asprintf(mem_ctx,
 353                                           "Could not open secrets database");
 354                 status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 355                 goto out;
 356         }
 357
 358         ret = ldb_transaction_start(ldb);
 359
 360         if (ret != LDB_SUCCESS) {
 361                 *error_string
 362                         = talloc_asprintf(mem_ctx,
 363                                           "Could not start transaction on secrets database: %s", ldb_errstring(ldb));
 364                 status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 365                 goto out;
 366         }
 367
 368         Py_Initialize();
 369         py_update_path(); /* Put the samba path at the start of sys.path */
 370         provision_mod = provision_module();
 371
 372         if (provision_mod == NULL) {
 373                 *error_string
 374                         = talloc_asprintf(mem_ctx, "Unable to import provision Python module.");
 375                 status = NT_STATUS_UNSUCCESSFUL;
 376                 goto out;
 377         }
 378
 379         provision_dict = PyModule_GetDict(provision_mod);
 380
 381         if (provision_dict == NULL) {
 382                 *error_string
 383                         = talloc_asprintf(mem_ctx, "Unable to get dictionary for provision module");
 384                 status = NT_STATUS_UNSUCCESSFUL;
 385                 goto out;
 386         }
 387
 388         provision_fn = PyDict_GetItemString(provision_dict, "secretsdb_self_join");
 389         if (provision_fn == NULL) {
 390                 *error_string
 391                         = talloc_asprintf(mem_ctx, "Unable to get provision_become_dc function");
 392                 status = NT_STATUS_UNSUCCESSFUL;
 393                 goto out;
 394         }
 395
 396         parameters = PyDict_New();
 397
 398         if(!dict_insert(parameters,
 399                         "secretsdb",
 400                         PyLdb_FromLdbContext(ldb))){
 401                 status = NT_STATUS_UNSUCCESSFUL;
 402                 goto out;
 403         }
 404         if (!dict_insert(parameters,
 405                          "domain",
 406                          PyStr_FromString(settings->domain_name))) {
 407                 status = NT_STATUS_UNSUCCESSFUL;
 408                 goto out;
 409         }
 410         if (settings->realm != NULL) {
 411                 if (!dict_insert(parameters,
 412                                  "realm",
 413                                  PyStr_FromString(settings->realm))) {
 414                         status = NT_STATUS_UNSUCCESSFUL;
 415                         goto out;
 416                 }
 417         }
 418         if (!dict_insert(parameters,
 419                          "machinepass",
 420                          PyStr_FromString(settings->machine_password))) {
 421                 status = NT_STATUS_UNSUCCESSFUL;
 422                 goto out;
 423         }
 424         if (!dict_insert(parameters,
 425                          "netbiosname",
 426                          PyStr_FromString(settings->netbios_name))) {
 427                 status = NT_STATUS_UNSUCCESSFUL;
 428                 goto out;
 429         }
 430
 431         py_sid = py_dom_sid_FromSid(settings->domain_sid);
 432         if (py_sid == NULL) {
 433                 status = NT_STATUS_UNSUCCESSFUL;
 434                 goto out;
 435         }
 436
 437         if (!dict_insert(parameters,
 438                          "domainsid",
 439                          py_sid)) {
 440                 status = NT_STATUS_UNSUCCESSFUL;
 441                 goto out;
 442         }
 443
 444         if (!dict_insert(parameters,
 445                          "secure_channel_type",
 446                          PyInt_FromLong(settings->secure_channel_type))) {
 447                 status = NT_STATUS_UNSUCCESSFUL;
 448                 goto out;
 449         }
 450
 451         if (!dict_insert(parameters,
 452                          "key_version_number",
 453                          PyInt_FromLong(settings->key_version_number))) {
 454                 status = NT_STATUS_UNSUCCESSFUL;
 455                 goto out;
 456         }
 457
 458         py_result = PyEval_CallObjectWithKeywords(provision_fn, NULL, parameters);
 459
 460         if (py_result == NULL) {
 461                 ldb_transaction_cancel(ldb);
 462                 status = NT_STATUS_UNSUCCESSFUL;
 463                 goto out;
 464         }
 465
 466         ret = ldb_transaction_commit(ldb);
 467         if (ret != LDB_SUCCESS) {
 468                 *error_string
 469                         = talloc_asprintf(mem_ctx,
 470                                           "Could not commit transaction on secrets database: %s", ldb_errstring(ldb));
 471                 status = NT_STATUS_INTERNAL_DB_ERROR;
 472                 goto out;
 473         }
 474
 475         status = NT_STATUS_OK;
 476 out:
 477         talloc_free(tmp_mem);
 478         Py_CLEAR(parameters);
 479         Py_CLEAR(provision_mod);
 480         Py_CLEAR(provision_fn);
 481         Py_CLEAR(provision_dict);
 482         Py_CLEAR(py_result);
 483         Py_CLEAR(py_sid);
 484         if (!NT_STATUS_IS_OK(status)) {
 485                 PyErr_Print();
 486                 PyErr_Clear();
 487         }
 488         return status;
 489 }
 490
 491
 492 struct ldb_context *provision_get_schema(TALLOC_CTX *mem_ctx,
 493                                          struct loadparm_context *lp_ctx,
 494                                          const char *schema_dn,
 495                                          DATA_BLOB *override_prefixmap)
 496 {
 497         PyObject *schema_mod, *schema_dict, *schema_fn, *py_result, *parameters;
 498         PyObject *py_ldb = NULL;
 499         struct ldb_context *ldb_result = NULL;
 500         Py_Initialize();
 501         py_update_path(); /* Put the samba path at the start of sys.path */
 502
 503         schema_mod = schema_module();
 504
 505         if (schema_mod == NULL) {
 506                 PyErr_Print();
 507                 DEBUG(0, ("Unable to import schema Python module.\n"));
 508                 return NULL;
 509         }
 510
 511         schema_dict = PyModule_GetDict(schema_mod);
 512
 513         if (schema_dict == NULL) {
 514                 DEBUG(0, ("Unable to get dictionary for schema module\n"));
 515                 return NULL;
 516         }
 517
 518         schema_fn = PyDict_GetItemString(schema_dict, "ldb_with_schema");
 519         if (schema_fn == NULL) {
 520                 PyErr_Print();
 521                 DEBUG(0, ("Unable to get schema_get_ldb function\n"));
 522                 return NULL;
 523         }
 524
 525         parameters = PyDict_New();
 526
 527         if (schema_dn) {
 528                 if (!dict_insert(parameters,
 529                                  "schemadn",
 530                                  PyStr_FromString(schema_dn))) {
 531                         return NULL;
 532                 }
 533         }
 534
 535         if (override_prefixmap) {
 536                 if (!dict_insert(parameters,
 537                                  "override_prefixmap",
 538                                  PyBytes_FromStringAndSize(
 539                                         (const char *)override_prefixmap->data,
 540                                         override_prefixmap->length))) {
 541                         return NULL;
 542                 }
 543         }
 544
 545         py_result = PyEval_CallObjectWithKeywords(schema_fn, NULL, parameters);
 546
 547         Py_DECREF(parameters);
 548
 549         if (py_result == NULL) {
 550                 PyErr_Print();
 551                 PyErr_Clear();
 552                 return NULL;
 553         }
 554
 555         py_ldb = PyObject_GetAttrString(py_result, "ldb");
 556         Py_DECREF(py_result);
 557         ldb_result = pyldb_Ldb_AsLdbContext(py_ldb);
 558         /*
 559          * #TODO #FIXME There is a leak here !!!
 560          * Looks like ldb is a new object returned from schema_fn
 561          * We extract the ldb_ctx from that which rightly
 562          * will be destoryed when py_ldb is decremented.
 563          * Presently the ldb_context is returned (but the owning
 564          * object is leaked)
 565         */
 566         return ldb_result;
 567 }