source3/smbd/pysmbd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Set NT and POSIX ACLs and other VFS operations from Python
   4
   5    Copyrigyt (C) Andrew Bartlett 2012
   6    Copyright (C) Jeremy Allison 1994-2009.
   7    Copyright (C) Andreas Gruenbacher 2002.
   8    Copyright (C) Simo Sorce <idra@samba.org> 2009.
   9    Copyright (C) Simo Sorce 2002
  10    Copyright (C) Eric Lorimer 2002
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include <Python.h>
  27 #include "includes.h"
  28 #include "python/py3compat.h"
  29 #include "python/modules.h"
  30 #include "smbd/smbd.h"
  31 #include "libcli/util/pyerrors.h"
  32 #include "librpc/rpc/pyrpc_util.h"
  33 #include <pytalloc.h>
  34 #include "system/filesys.h"
  35 #include "passdb.h"
  36 #include "secrets.h"
  37 #include "auth.h"
  38
  39 extern const struct generic_mapping file_generic_mapping;
  40
  41 #undef  DBGC_CLASS
  42 #define DBGC_CLASS DBGC_ACLS
  43
  44 #ifdef O_DIRECTORY
  45 #define DIRECTORY_FLAGS O_RDONLY|O_DIRECTORY
  46 #else
  47 /* POSIX allows us to open a directory with O_RDONLY. */
  48 #define DIRECTORY_FLAGS O_RDONLY
  49 #endif
  50
  51
  52 static connection_struct *get_conn_tos(
  53         const char *service,
  54         const struct auth_session_info *session_info)
  55 {
  56         struct conn_struct_tos *c = NULL;
  57         int snum = -1;
  58         NTSTATUS status;
  59         char *cwd = NULL;
  60         struct smb_filename cwd_fname = {0};
  61         int ret;
  62
  63         if (!posix_locking_init(false)) {
  64                 PyErr_NoMemory();
  65                 return NULL;
  66         }
  67
  68         if (service) {
  69                 snum = lp_servicenumber(service);
  70                 if (snum == -1) {
  71                         PyErr_SetString(PyExc_RuntimeError, "unknown service");
  72                         return NULL;
  73                 }
  74         }
  75
  76         status = create_conn_struct_tos(NULL,
  77                                         snum,
  78                                         "/",
  79                                         session_info,
  80                                         &c);
  81         PyErr_NTSTATUS_IS_ERR_RAISE(status);
  82
  83         /* Ignore read-only and share restrictions */
  84         c->conn->read_only = false;
  85         c->conn->share_access = SEC_RIGHTS_FILE_ALL;
  86
  87         /* Provided by libreplace if not present. Always mallocs. */
  88         cwd = get_current_dir_name();
  89         if (cwd == NULL) {
  90                 PyErr_NoMemory();
  91                 return NULL;
  92         }
  93
  94         cwd_fname.base_name = cwd;
  95         /*
  96          * We need to call vfs_ChDir() to initialize
  97          * conn->cwd_fsp correctly. Change directory
  98          * to current directory (so no change for process).
  99          */
 100         ret = vfs_ChDir(c->conn, &cwd_fname);
 101         if (ret != 0) {
 102                 status = map_nt_error_from_unix(errno);
 103                 SAFE_FREE(cwd);
 104                 PyErr_NTSTATUS_IS_ERR_RAISE(status);
 105         }
 106
 107         SAFE_FREE(cwd);
 108
 109         return c->conn;
 110 }
 111
 112 static int set_sys_acl_conn(const char *fname,
 113                                  SMB_ACL_TYPE_T acltype,
 114                                  SMB_ACL_T theacl, connection_struct *conn)
 115 {
 116         int ret;
 117         struct smb_filename *smb_fname = NULL;
 118
 119         TALLOC_CTX *frame = talloc_stackframe();
 120
 121         smb_fname = synthetic_smb_fname_split(frame,
 122                                         fname,
 123                                         lp_posix_pathnames());
 124         if (smb_fname == NULL) {
 125                 TALLOC_FREE(frame);
 126                 return -1;
 127         }
 128
 129         ret = SMB_VFS_SYS_ACL_SET_FILE( conn, smb_fname, acltype, theacl);
 130
 131         TALLOC_FREE(frame);
 132         return ret;
 133 }
 134
 135
 136 static NTSTATUS init_files_struct(TALLOC_CTX *mem_ctx,
 137                                   const char *fname,
 138                                   struct connection_struct *conn,
 139                                   int flags,
 140                                   struct files_struct **_fsp)
 141 {
 142         struct smb_filename *smb_fname = NULL;
 143         int ret;
 144         mode_t saved_umask;
 145         struct files_struct *fsp;
 146
 147         fsp = talloc_zero(mem_ctx, struct files_struct);
 148         if (fsp == NULL) {
 149                 return NT_STATUS_NO_MEMORY;
 150         }
 151         fsp->fh = talloc(fsp, struct fd_handle);
 152         if (fsp->fh == NULL) {
 153                 return NT_STATUS_NO_MEMORY;
 154         }
 155         fsp->conn = conn;
 156
 157         smb_fname = synthetic_smb_fname_split(fsp,
 158                                               fname,
 159                                               lp_posix_pathnames());
 160         if (smb_fname == NULL) {
 161                 return NT_STATUS_NO_MEMORY;
 162         }
 163
 164         fsp->fsp_name = smb_fname;
 165
 166         /*
 167          * we want total control over the permissions on created files,
 168          * so set our umask to 0 (this matters if flags contains O_CREAT)
 169          */
 170         saved_umask = umask(0);
 171
 172         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, 00644);
 173
 174         umask(saved_umask);
 175
 176         if (fsp->fh->fd == -1) {
 177                 int err = errno;
 178                 if (err == ENOENT) {
 179                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 180                 }
 181                 return NT_STATUS_INVALID_PARAMETER;
 182         }
 183
 184         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 185         if (ret == -1) {
 186                 /* If we have an fd, this stat should succeed. */
 187                 DEBUG(0,("Error doing fstat on open file %s (%s)\n",
 188                          smb_fname_str_dbg(smb_fname),
 189                          strerror(errno) ));
 190                 return map_nt_error_from_unix(errno);
 191         }
 192
 193         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
 194         fsp->vuid = UID_FIELD_INVALID;
 195         fsp->file_pid = 0;
 196         fsp->can_lock = True;
 197         fsp->can_read = True;
 198         fsp->can_write = True;
 199         fsp->print_file = NULL;
 200         fsp->modified = False;
 201         fsp->sent_oplock_break = NO_BREAK_SENT;
 202         fsp->is_directory = S_ISDIR(smb_fname->st.st_ex_mode);
 203
 204         *_fsp = fsp;
 205
 206         return NT_STATUS_OK;
 207 }
 208
 209 static NTSTATUS set_nt_acl_conn(const char *fname,
 210                                 uint32_t security_info_sent, const struct security_descriptor *sd,
 211                                 connection_struct *conn)
 212 {
 213         TALLOC_CTX *frame = talloc_stackframe();
 214         struct files_struct *fsp = NULL;
 215         NTSTATUS status = NT_STATUS_OK;
 216
 217         /* first, try to open it as a file with flag O_RDWR */
 218         status = init_files_struct(frame,
 219                                    fname,
 220                                    conn,
 221                                    O_RDWR,
 222                                    &fsp);
 223         if (!NT_STATUS_IS_OK(status) && errno == EISDIR) {
 224                 /* if fail, try to open as dir */
 225                 status = init_files_struct(frame,
 226                                            fname,
 227                                            conn,
 228                                            DIRECTORY_FLAGS,
 229                                            &fsp);
 230         }
 231
 232         if (!NT_STATUS_IS_OK(status)) {
 233                 DBG_ERR("init_files_struct failed: %s\n",
 234                         nt_errstr(status));
 235                 if (fsp != NULL) {
 236                         SMB_VFS_CLOSE(fsp);
 237                 }
 238                 TALLOC_FREE(frame);
 239                 return status;
 240         }
 241
 242         status = SMB_VFS_FSET_NT_ACL(fsp, security_info_sent, sd);
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 DEBUG(0,("set_nt_acl_no_snum: fset_nt_acl returned %s.\n", nt_errstr(status)));
 245         }
 246
 247         SMB_VFS_CLOSE(fsp);
 248
 249         TALLOC_FREE(frame);
 250         return status;
 251 }
 252
 253 static NTSTATUS get_nt_acl_conn(TALLOC_CTX *mem_ctx,
 254                                 const char *fname,
 255                                 connection_struct *conn,
 256                                 uint32_t security_info_wanted,
 257                                 struct security_descriptor **sd)
 258 {
 259         TALLOC_CTX *frame = talloc_stackframe();
 260         NTSTATUS status;
 261         struct smb_filename *smb_fname = synthetic_smb_fname(talloc_tos(),
 262                                         fname,
 263                                         NULL,
 264                                         NULL,
 265                                         lp_posix_pathnames() ?
 266                                                 SMB_FILENAME_POSIX_PATH : 0);
 267
 268         if (smb_fname == NULL) {
 269                 TALLOC_FREE(frame);
 270                 return NT_STATUS_NO_MEMORY;
 271         }
 272
 273         status = SMB_VFS_GET_NT_ACL(conn,
 274                                 smb_fname,
 275                                 security_info_wanted,
 276                                 mem_ctx,
 277                                 sd);
 278         if (!NT_STATUS_IS_OK(status)) {
 279                 DEBUG(0,("get_nt_acl_conn: get_nt_acl returned %s.\n", nt_errstr(status)));
 280         }
 281
 282         TALLOC_FREE(frame);
 283
 284         return status;
 285 }
 286
 287 static int set_acl_entry_perms(SMB_ACL_ENTRY_T entry, mode_t perm_mask)
 288 {
 289         SMB_ACL_PERMSET_T perms = NULL;
 290
 291         if (sys_acl_get_permset(entry, &perms) != 0) {
 292                 return -1;
 293         }
 294
 295         if (sys_acl_clear_perms(perms) != 0) {
 296                 return -1;
 297         }
 298
 299         if ((perm_mask & SMB_ACL_READ) != 0 &&
 300             sys_acl_add_perm(perms, SMB_ACL_READ) != 0) {
 301                 return -1;
 302         }
 303
 304         if ((perm_mask & SMB_ACL_WRITE) != 0 &&
 305             sys_acl_add_perm(perms, SMB_ACL_WRITE) != 0) {
 306                 return -1;
 307         }
 308
 309         if ((perm_mask & SMB_ACL_EXECUTE) != 0 &&
 310             sys_acl_add_perm(perms, SMB_ACL_EXECUTE) != 0) {
 311                 return -1;
 312         }
 313
 314         if (sys_acl_set_permset(entry, perms) != 0) {
 315                 return -1;
 316         }
 317
 318         return 0;
 319 }
 320
 321 static SMB_ACL_T make_simple_acl(TALLOC_CTX *mem_ctx,
 322                         gid_t gid,
 323                         mode_t chmod_mode)
 324 {
 325         mode_t mode = SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE;
 326
 327         mode_t mode_user = (chmod_mode & 0700) >> 6;
 328         mode_t mode_group = (chmod_mode & 070) >> 3;
 329         mode_t mode_other = chmod_mode &  07;
 330         SMB_ACL_ENTRY_T entry;
 331         SMB_ACL_T acl = sys_acl_init(mem_ctx);
 332
 333         if (!acl) {
 334                 return NULL;
 335         }
 336
 337         if (sys_acl_create_entry(&acl, &entry) != 0) {
 338                 TALLOC_FREE(acl);
 339                 return NULL;
 340         }
 341
 342         if (sys_acl_set_tag_type(entry, SMB_ACL_USER_OBJ) != 0) {
 343                 TALLOC_FREE(acl);
 344                 return NULL;
 345         }
 346
 347         if (set_acl_entry_perms(entry, mode_user) != 0) {
 348                 TALLOC_FREE(acl);
 349                 return NULL;
 350         }
 351
 352         if (sys_acl_create_entry(&acl, &entry) != 0) {
 353                 TALLOC_FREE(acl);
 354                 return NULL;
 355         }
 356
 357         if (sys_acl_set_tag_type(entry, SMB_ACL_GROUP_OBJ) != 0) {
 358                 TALLOC_FREE(acl);
 359                 return NULL;
 360         }
 361
 362         if (set_acl_entry_perms(entry, mode_group) != 0) {
 363                 TALLOC_FREE(acl);
 364                 return NULL;
 365         }
 366
 367         if (sys_acl_create_entry(&acl, &entry) != 0) {
 368                 TALLOC_FREE(acl);
 369                 return NULL;
 370         }
 371
 372         if (sys_acl_set_tag_type(entry, SMB_ACL_OTHER) != 0) {
 373                 TALLOC_FREE(acl);
 374                 return NULL;
 375         }
 376
 377         if (set_acl_entry_perms(entry, mode_other) != 0) {
 378                 TALLOC_FREE(acl);
 379                 return NULL;
 380         }
 381
 382         if (gid != -1) {
 383                 if (sys_acl_create_entry(&acl, &entry) != 0) {
 384                         TALLOC_FREE(acl);
 385                         return NULL;
 386                 }
 387
 388                 if (sys_acl_set_tag_type(entry, SMB_ACL_GROUP) != 0) {
 389                         TALLOC_FREE(acl);
 390                         return NULL;
 391                 }
 392
 393                 if (sys_acl_set_qualifier(entry, &gid) != 0) {
 394                         TALLOC_FREE(acl);
 395                         return NULL;
 396                 }
 397
 398                 if (set_acl_entry_perms(entry, mode_group) != 0) {
 399                         TALLOC_FREE(acl);
 400                         return NULL;
 401                 }
 402         }
 403
 404         if (sys_acl_create_entry(&acl, &entry) != 0) {
 405                 TALLOC_FREE(acl);
 406                 return NULL;
 407         }
 408
 409         if (sys_acl_set_tag_type(entry, SMB_ACL_MASK) != 0) {
 410                 TALLOC_FREE(acl);
 411                 return NULL;
 412         }
 413
 414         if (set_acl_entry_perms(entry, mode) != 0) {
 415                 TALLOC_FREE(acl);
 416                 return NULL;
 417         }
 418
 419         return acl;
 420 }
 421
 422 /*
 423   set a simple ACL on a file, as a test
 424  */
 425 static PyObject *py_smbd_set_simple_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 426 {
 427         const char * const kwnames[] = {
 428                 "fname",
 429                 "mode",
 430                 "gid",
 431                 "service",
 432                 NULL
 433         };
 434         char *fname, *service = NULL;
 435         int ret;
 436         int mode, gid = -1;
 437         SMB_ACL_T acl;
 438         TALLOC_CTX *frame;
 439         connection_struct *conn;
 440
 441         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "si|iz",
 442                                          discard_const_p(char *, kwnames),
 443                                          &fname,
 444                                          &mode,
 445                                          &gid,
 446                                          &service))
 447                 return NULL;
 448
 449         frame = talloc_stackframe();
 450
 451         acl = make_simple_acl(frame, gid, mode);
 452         if (acl == NULL) {
 453                 TALLOC_FREE(frame);
 454                 return NULL;
 455         }
 456
 457         conn = get_conn_tos(service, NULL);
 458         if (!conn) {
 459                 TALLOC_FREE(frame);
 460                 return NULL;
 461         }
 462
 463         ret = set_sys_acl_conn(fname, SMB_ACL_TYPE_ACCESS, acl, conn);
 464
 465         if (ret != 0) {
 466                 TALLOC_FREE(frame);
 467                 errno = ret;
 468                 return PyErr_SetFromErrno(PyExc_OSError);
 469         }
 470
 471         TALLOC_FREE(frame);
 472
 473         Py_RETURN_NONE;
 474 }
 475
 476 /*
 477   chown a file
 478  */
 479 static PyObject *py_smbd_chown(PyObject *self, PyObject *args, PyObject *kwargs)
 480 {
 481         const char * const kwnames[] = { "fname", "uid", "gid", "service", NULL };
 482         connection_struct *conn;
 483         int ret;
 484         NTSTATUS status;
 485         char *fname, *service = NULL;
 486         int uid, gid;
 487         TALLOC_CTX *frame;
 488         struct files_struct *fsp = NULL;
 489
 490         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sii|z",
 491                                          discard_const_p(char *, kwnames),
 492                                          &fname, &uid, &gid, &service))
 493                 return NULL;
 494
 495         frame = talloc_stackframe();
 496
 497         conn = get_conn_tos(service, NULL);
 498         if (!conn) {
 499                 TALLOC_FREE(frame);
 500                 return NULL;
 501         }
 502
 503         /* first, try to open it as a file with flag O_RDWR */
 504         status = init_files_struct(frame,
 505                                    fname,
 506                                    conn,
 507                                    O_RDWR,
 508                                    &fsp);
 509         if (!NT_STATUS_IS_OK(status) && errno == EISDIR) {
 510                 /* if fail, try to open as dir */
 511                 status = init_files_struct(frame,
 512                                            fname,
 513                                            conn,
 514                                            DIRECTORY_FLAGS,
 515                                            &fsp);
 516         }
 517
 518         if (!NT_STATUS_IS_OK(status)) {
 519                 DBG_ERR("init_files_struct failed: %s\n",
 520                         nt_errstr(status));
 521                 if (fsp != NULL) {
 522                         SMB_VFS_CLOSE(fsp);
 523                 }
 524                 TALLOC_FREE(frame);
 525                 /*
 526                  * The following macro raises a python
 527                  * error then returns NULL.
 528                  */
 529                 PyErr_NTSTATUS_IS_ERR_RAISE(status);
 530         }
 531
 532         ret = SMB_VFS_FCHOWN(fsp, uid, gid);
 533         if (ret != 0) {
 534                 int saved_errno = errno;
 535                 SMB_VFS_CLOSE(fsp);
 536                 TALLOC_FREE(frame);
 537                 errno = saved_errno;
 538                 return PyErr_SetFromErrno(PyExc_OSError);
 539         }
 540
 541         SMB_VFS_CLOSE(fsp);
 542         TALLOC_FREE(frame);
 543
 544         Py_RETURN_NONE;
 545 }
 546
 547 /*
 548   unlink a file
 549  */
 550 static PyObject *py_smbd_unlink(PyObject *self, PyObject *args, PyObject *kwargs)
 551 {
 552         const char * const kwnames[] = { "fname", "service", NULL };
 553         connection_struct *conn;
 554         int ret;
 555         struct smb_filename *smb_fname = NULL;
 556         char *fname, *service = NULL;
 557         TALLOC_CTX *frame;
 558
 559         frame = talloc_stackframe();
 560
 561         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|z",
 562                                          discard_const_p(char *, kwnames),
 563                                          &fname, &service)) {
 564                 TALLOC_FREE(frame);
 565                 return NULL;
 566         }
 567
 568         conn = get_conn_tos(service, NULL);
 569         if (!conn) {
 570                 TALLOC_FREE(frame);
 571                 return NULL;
 572         }
 573
 574         smb_fname = synthetic_smb_fname_split(frame,
 575                                         fname,
 576                                         lp_posix_pathnames());
 577         if (smb_fname == NULL) {
 578                 TALLOC_FREE(frame);
 579                 return PyErr_NoMemory();
 580         }
 581
 582         ret = SMB_VFS_UNLINKAT(conn,
 583                         conn->cwd_fsp,
 584                         smb_fname,
 585                         0);
 586         if (ret != 0) {
 587                 TALLOC_FREE(frame);
 588                 errno = ret;
 589                 return PyErr_SetFromErrno(PyExc_OSError);
 590         }
 591
 592         TALLOC_FREE(frame);
 593
 594         Py_RETURN_NONE;
 595 }
 596
 597 /*
 598   check if we have ACL support
 599  */
 600 static PyObject *py_smbd_have_posix_acls(PyObject *self,
 601                 PyObject *Py_UNUSED(ignored))
 602 {
 603 #ifdef HAVE_POSIX_ACLS
 604         return PyBool_FromLong(true);
 605 #else
 606         return PyBool_FromLong(false);
 607 #endif
 608 }
 609
 610 /*
 611   set the NT ACL on a file
 612  */
 613 static PyObject *py_smbd_set_nt_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 614 {
 615         const char * const kwnames[] = {
 616                 "fname", "security_info_sent", "sd",
 617                 "service", "session_info", NULL };
 618
 619         NTSTATUS status;
 620         char *fname, *service = NULL;
 621         int security_info_sent;
 622         PyObject *py_sd;
 623         struct security_descriptor *sd;
 624         PyObject *py_session = Py_None;
 625         struct auth_session_info *session_info = NULL;
 626         connection_struct *conn;
 627         TALLOC_CTX *frame;
 628
 629         frame = talloc_stackframe();
 630
 631         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "siO|zO",
 632                                          discard_const_p(char *, kwnames),
 633                                          &fname, &security_info_sent, &py_sd,
 634                                          &service, &py_session)) {
 635                 TALLOC_FREE(frame);
 636                 return NULL;
 637         }
 638
 639         if (!py_check_dcerpc_type(py_sd, "samba.dcerpc.security", "descriptor")) {
 640                 TALLOC_FREE(frame);
 641                 return NULL;
 642         }
 643
 644         if (py_session != Py_None) {
 645                 if (!py_check_dcerpc_type(py_session,
 646                                           "samba.dcerpc.auth",
 647                                           "session_info")) {
 648                         TALLOC_FREE(frame);
 649                         return NULL;
 650                 }
 651                 session_info = pytalloc_get_type(py_session,
 652                                                  struct auth_session_info);
 653                 if (!session_info) {
 654                         PyErr_Format(PyExc_TypeError,
 655                                      "Expected auth_session_info for session_info argument got %s",
 656                                      pytalloc_get_name(py_session));
 657                         return NULL;
 658                 }
 659         }
 660
 661         conn = get_conn_tos(service, session_info);
 662         if (!conn) {
 663                 TALLOC_FREE(frame);
 664                 return NULL;
 665         }
 666
 667         sd = pytalloc_get_type(py_sd, struct security_descriptor);
 668
 669         status = set_nt_acl_conn(fname, security_info_sent, sd, conn);
 670         TALLOC_FREE(frame);
 671         PyErr_NTSTATUS_IS_ERR_RAISE(status);
 672
 673         Py_RETURN_NONE;
 674 }
 675
 676 /*
 677   Return the NT ACL on a file
 678  */
 679 static PyObject *py_smbd_get_nt_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 680 {
 681         const char * const kwnames[] = { "fname",
 682                                          "security_info_wanted",
 683                                          "service",
 684                                          "session_info",
 685                                          NULL };
 686         char *fname, *service = NULL;
 687         int security_info_wanted;
 688         PyObject *py_sd;
 689         struct security_descriptor *sd;
 690         TALLOC_CTX *frame = talloc_stackframe();
 691         PyObject *py_session = Py_None;
 692         struct auth_session_info *session_info = NULL;
 693         connection_struct *conn;
 694         NTSTATUS status;
 695         int ret = 1;
 696
 697         ret = PyArg_ParseTupleAndKeywords(args,
 698                                           kwargs,
 699                                           "si|zO",
 700                                           discard_const_p(char *, kwnames),
 701                                           &fname,
 702                                           &security_info_wanted,
 703                                           &service,
 704                                           &py_session);
 705         if (!ret) {
 706                 TALLOC_FREE(frame);
 707                 return NULL;
 708         }
 709
 710         if (py_session != Py_None) {
 711                 if (!py_check_dcerpc_type(py_session,
 712                                           "samba.dcerpc.auth",
 713                                           "session_info")) {
 714                         TALLOC_FREE(frame);
 715                         return NULL;
 716                 }
 717                 session_info = pytalloc_get_type(py_session,
 718                                                  struct auth_session_info);
 719                 if (!session_info) {
 720                         PyErr_Format(
 721                                 PyExc_TypeError,
 722                                 "Expected auth_session_info for "
 723                                 "session_info argument got %s",
 724                                 pytalloc_get_name(py_session));
 725                         return NULL;
 726                 }
 727         }
 728
 729         conn = get_conn_tos(service, session_info);
 730         if (!conn) {
 731                 TALLOC_FREE(frame);
 732                 return NULL;
 733         }
 734
 735         status = get_nt_acl_conn(frame, fname, conn, security_info_wanted, &sd);
 736         PyErr_NTSTATUS_IS_ERR_RAISE(status);
 737
 738         py_sd = py_return_ndr_struct("samba.dcerpc.security", "descriptor", sd, sd);
 739
 740         TALLOC_FREE(frame);
 741
 742         return py_sd;
 743 }
 744
 745 /*
 746   set the posix (or similar) ACL on a file
 747  */
 748 static PyObject *py_smbd_set_sys_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 749 {
 750         const char * const kwnames[] = { "fname", "acl_type", "acl", "service", NULL };
 751         TALLOC_CTX *frame = talloc_stackframe();
 752         int ret;
 753         char *fname, *service = NULL;
 754         PyObject *py_acl;
 755         struct smb_acl_t *acl;
 756         int acl_type;
 757         connection_struct *conn;
 758
 759         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "siO|z",
 760                                          discard_const_p(char *, kwnames),
 761                                          &fname, &acl_type, &py_acl, &service)) {
 762                 TALLOC_FREE(frame);
 763                 return NULL;
 764         }
 765
 766         if (!py_check_dcerpc_type(py_acl, "samba.dcerpc.smb_acl", "t")) {
 767                 TALLOC_FREE(frame);
 768                 return NULL;
 769         }
 770
 771         conn = get_conn_tos(service, NULL);
 772         if (!conn) {
 773                 TALLOC_FREE(frame);
 774                 return NULL;
 775         }
 776
 777         acl = pytalloc_get_type(py_acl, struct smb_acl_t);
 778
 779         ret = set_sys_acl_conn(fname, acl_type, acl, conn);
 780         if (ret != 0) {
 781                 TALLOC_FREE(frame);
 782                 errno = ret;
 783                 return PyErr_SetFromErrno(PyExc_OSError);
 784         }
 785
 786         TALLOC_FREE(frame);
 787         Py_RETURN_NONE;
 788 }
 789
 790 /*
 791   Return the posix (or similar) ACL on a file
 792  */
 793 static PyObject *py_smbd_get_sys_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 794 {
 795         const char * const kwnames[] = { "fname", "acl_type", "service", NULL };
 796         char *fname;
 797         PyObject *py_acl;
 798         struct smb_acl_t *acl;
 799         int acl_type;
 800         TALLOC_CTX *frame = talloc_stackframe();
 801         connection_struct *conn;
 802         char *service = NULL;
 803         struct smb_filename *smb_fname = NULL;
 804
 805         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "si|z",
 806                                          discard_const_p(char *, kwnames),
 807                                          &fname, &acl_type, &service)) {
 808                 TALLOC_FREE(frame);
 809                 return NULL;
 810         }
 811
 812         conn = get_conn_tos(service, NULL);
 813         if (!conn) {
 814                 TALLOC_FREE(frame);
 815                 return NULL;
 816         }
 817
 818         smb_fname = synthetic_smb_fname_split(frame,
 819                                         fname,
 820                                         lp_posix_pathnames());
 821         if (smb_fname == NULL) {
 822                 TALLOC_FREE(frame);
 823                 return NULL;
 824         }
 825         acl = SMB_VFS_SYS_ACL_GET_FILE( conn, smb_fname, acl_type, frame);
 826         if (!acl) {
 827                 TALLOC_FREE(frame);
 828                 return PyErr_SetFromErrno(PyExc_OSError);
 829         }
 830
 831         py_acl = py_return_ndr_struct("samba.dcerpc.smb_acl", "t", acl, acl);
 832
 833         TALLOC_FREE(frame);
 834
 835         return py_acl;
 836 }
 837
 838 static PyObject *py_smbd_mkdir(PyObject *self, PyObject *args, PyObject *kwargs)
 839 {
 840         const char * const kwnames[] = { "fname", "service", NULL };
 841         char *fname, *service = NULL;
 842         TALLOC_CTX *frame = talloc_stackframe();
 843         struct connection_struct *conn = NULL;
 844         struct smb_filename *smb_fname = NULL;
 845         int ret;
 846         mode_t saved_umask;
 847
 848         if (!PyArg_ParseTupleAndKeywords(args,
 849                                          kwargs,
 850                                          "s|z",
 851                                          discard_const_p(char *,
 852                                                          kwnames),
 853                                          &fname,
 854                                          &service)) {
 855                 TALLOC_FREE(frame);
 856                 return NULL;
 857         }
 858
 859         conn = get_conn_tos(service, NULL);
 860         if (!conn) {
 861                 TALLOC_FREE(frame);
 862                 return NULL;
 863         }
 864
 865         smb_fname = synthetic_smb_fname(talloc_tos(),
 866                                         fname,
 867                                         NULL,
 868                                         NULL,
 869                                         lp_posix_pathnames() ?
 870                                         SMB_FILENAME_POSIX_PATH : 0);
 871
 872         if (smb_fname == NULL) {
 873                 TALLOC_FREE(frame);
 874                 return NULL;
 875         }
 876
 877         /* we want total control over the permissions on created files,
 878            so set our umask to 0 */
 879         saved_umask = umask(0);
 880
 881         ret = SMB_VFS_MKDIRAT(conn,
 882                         conn->cwd_fsp,
 883                         smb_fname,
 884                         00755);
 885
 886         umask(saved_umask);
 887
 888         if (ret == -1) {
 889                 DBG_ERR("mkdirat error=%d (%s)\n", errno, strerror(errno));
 890                 TALLOC_FREE(frame);
 891                 return NULL;
 892         }
 893
 894         TALLOC_FREE(frame);
 895         Py_RETURN_NONE;
 896 }
 897
 898
 899 /*
 900   Create an empty file
 901  */
 902 static PyObject *py_smbd_create_file(PyObject *self, PyObject *args, PyObject *kwargs)
 903 {
 904         const char * const kwnames[] = { "fname", "service", NULL };
 905         char *fname, *service = NULL;
 906         TALLOC_CTX *frame = talloc_stackframe();
 907         struct connection_struct *conn = NULL;
 908         struct files_struct *fsp = NULL;
 909         NTSTATUS status;
 910
 911         if (!PyArg_ParseTupleAndKeywords(args,
 912                                          kwargs,
 913                                          "s|z",
 914                                          discard_const_p(char *,
 915                                                          kwnames),
 916                                          &fname,
 917                                          &service)) {
 918                 TALLOC_FREE(frame);
 919                 return NULL;
 920         }
 921
 922         conn = get_conn_tos(service, NULL);
 923         if (!conn) {
 924                 TALLOC_FREE(frame);
 925                 return NULL;
 926         }
 927
 928         status = init_files_struct(frame,
 929                                    fname,
 930                                    conn,
 931                                    O_CREAT|O_EXCL|O_RDWR,
 932                                    &fsp);
 933         if (!NT_STATUS_IS_OK(status)) {
 934                 DBG_ERR("init_files_struct failed: %s\n",
 935                         nt_errstr(status));
 936         }
 937
 938         TALLOC_FREE(frame);
 939         Py_RETURN_NONE;
 940 }
 941
 942
 943 static PyMethodDef py_smbd_methods[] = {
 944         { "have_posix_acls",
 945                 (PyCFunction)py_smbd_have_posix_acls, METH_NOARGS,
 946                 NULL },
 947         { "set_simple_acl",
 948                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_set_simple_acl),
 949                 METH_VARARGS|METH_KEYWORDS,
 950                 NULL },
 951         { "set_nt_acl",
 952                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_set_nt_acl),
 953                 METH_VARARGS|METH_KEYWORDS,
 954                 NULL },
 955         { "get_nt_acl",
 956                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_get_nt_acl),
 957                 METH_VARARGS|METH_KEYWORDS,
 958                 NULL },
 959         { "get_sys_acl",
 960                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_get_sys_acl),
 961                 METH_VARARGS|METH_KEYWORDS,
 962                 NULL },
 963         { "set_sys_acl",
 964                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_set_sys_acl),
 965                 METH_VARARGS|METH_KEYWORDS,
 966                 NULL },
 967         { "chown",
 968                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_chown),
 969                 METH_VARARGS|METH_KEYWORDS,
 970                 NULL },
 971         { "unlink",
 972                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_unlink),
 973                 METH_VARARGS|METH_KEYWORDS,
 974                 NULL },
 975         { "mkdir",
 976                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_mkdir),
 977                 METH_VARARGS|METH_KEYWORDS,
 978                 NULL },
 979         { "create_file",
 980                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_create_file),
 981                 METH_VARARGS|METH_KEYWORDS,
 982                 NULL },
 983         { NULL }
 984 };
 985
 986 void initsmbd(void);
 987
 988 static struct PyModuleDef moduledef = {
 989     PyModuleDef_HEAD_INIT,
 990     .m_name = "smbd",
 991     .m_doc = "Python bindings for the smbd file server.",
 992     .m_size = -1,
 993     .m_methods = py_smbd_methods,
 994 };
 995
 996 MODULE_INIT_FUNC(smbd)
 997 {
 998         PyObject *m = NULL;
 999
1000         m = PyModule_Create(&moduledef);
1001         return m;
1002 }