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[] = { "fname", "mode", "gid", "service", NULL };
 428         char *fname, *service = NULL;
 429         int ret;
 430         int mode, gid = -1;
 431         SMB_ACL_T acl;
 432         TALLOC_CTX *frame;
 433         connection_struct *conn;
 434
 435         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "si|iz",
 436                                          discard_const_p(char *, kwnames),
 437                                          &fname, &mode, &gid, &service))
 438                 return NULL;
 439
 440         frame = talloc_stackframe();
 441
 442         acl = make_simple_acl(frame, gid, mode);
 443         if (acl == NULL) {
 444                 TALLOC_FREE(frame);
 445                 return NULL;
 446         }
 447
 448         conn = get_conn_tos(service, NULL);
 449         if (!conn) {
 450                 TALLOC_FREE(frame);
 451                 return NULL;
 452         }
 453
 454         ret = set_sys_acl_conn(fname, SMB_ACL_TYPE_ACCESS, acl, conn);
 455
 456         if (ret != 0) {
 457                 TALLOC_FREE(frame);
 458                 errno = ret;
 459                 return PyErr_SetFromErrno(PyExc_OSError);
 460         }
 461
 462         TALLOC_FREE(frame);
 463
 464         Py_RETURN_NONE;
 465 }
 466
 467 /*
 468   chown a file
 469  */
 470 static PyObject *py_smbd_chown(PyObject *self, PyObject *args, PyObject *kwargs)
 471 {
 472         const char * const kwnames[] = { "fname", "uid", "gid", "service", NULL };
 473         connection_struct *conn;
 474         int ret;
 475
 476         char *fname, *service = NULL;
 477         int uid, gid;
 478         TALLOC_CTX *frame;
 479         struct smb_filename *smb_fname = NULL;
 480
 481         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sii|z",
 482                                          discard_const_p(char *, kwnames),
 483                                          &fname, &uid, &gid, &service))
 484                 return NULL;
 485
 486         frame = talloc_stackframe();
 487
 488         conn = get_conn_tos(service, NULL);
 489         if (!conn) {
 490                 TALLOC_FREE(frame);
 491                 return NULL;
 492         }
 493
 494         smb_fname = synthetic_smb_fname(talloc_tos(),
 495                                         fname,
 496                                         NULL,
 497                                         NULL,
 498                                         lp_posix_pathnames() ?
 499                                                 SMB_FILENAME_POSIX_PATH : 0);
 500         if (smb_fname == NULL) {
 501                 TALLOC_FREE(frame);
 502                 errno = ENOMEM;
 503                 return PyErr_SetFromErrno(PyExc_OSError);
 504         }
 505
 506         ret = SMB_VFS_CHOWN(conn, smb_fname, uid, gid);
 507         if (ret != 0) {
 508                 TALLOC_FREE(frame);
 509                 errno = ret;
 510                 return PyErr_SetFromErrno(PyExc_OSError);
 511         }
 512
 513         TALLOC_FREE(frame);
 514
 515         Py_RETURN_NONE;
 516 }
 517
 518 /*
 519   unlink a file
 520  */
 521 static PyObject *py_smbd_unlink(PyObject *self, PyObject *args, PyObject *kwargs)
 522 {
 523         const char * const kwnames[] = { "fname", "service", NULL };
 524         connection_struct *conn;
 525         int ret;
 526         struct smb_filename *smb_fname = NULL;
 527         char *fname, *service = NULL;
 528         TALLOC_CTX *frame;
 529
 530         frame = talloc_stackframe();
 531
 532         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|z",
 533                                          discard_const_p(char *, kwnames),
 534                                          &fname, &service)) {
 535                 TALLOC_FREE(frame);
 536                 return NULL;
 537         }
 538
 539         conn = get_conn_tos(service, NULL);
 540         if (!conn) {
 541                 TALLOC_FREE(frame);
 542                 return NULL;
 543         }
 544
 545         smb_fname = synthetic_smb_fname_split(frame,
 546                                         fname,
 547                                         lp_posix_pathnames());
 548         if (smb_fname == NULL) {
 549                 TALLOC_FREE(frame);
 550                 return PyErr_NoMemory();
 551         }
 552
 553         ret = SMB_VFS_UNLINK(conn, smb_fname);
 554         if (ret != 0) {
 555                 TALLOC_FREE(frame);
 556                 errno = ret;
 557                 return PyErr_SetFromErrno(PyExc_OSError);
 558         }
 559
 560         TALLOC_FREE(frame);
 561
 562         Py_RETURN_NONE;
 563 }
 564
 565 /*
 566   check if we have ACL support
 567  */
 568 static PyObject *py_smbd_have_posix_acls(PyObject *self,
 569                 PyObject *Py_UNUSED(ignored))
 570 {
 571 #ifdef HAVE_POSIX_ACLS
 572         return PyBool_FromLong(true);
 573 #else
 574         return PyBool_FromLong(false);
 575 #endif
 576 }
 577
 578 /*
 579   set the NT ACL on a file
 580  */
 581 static PyObject *py_smbd_set_nt_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 582 {
 583         const char * const kwnames[] = {
 584                 "fname", "security_info_sent", "sd",
 585                 "service", "session_info", NULL };
 586
 587         NTSTATUS status;
 588         char *fname, *service = NULL;
 589         int security_info_sent;
 590         PyObject *py_sd;
 591         struct security_descriptor *sd;
 592         PyObject *py_session = Py_None;
 593         struct auth_session_info *session_info = NULL;
 594         connection_struct *conn;
 595         TALLOC_CTX *frame;
 596
 597         frame = talloc_stackframe();
 598
 599         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "siO|zO",
 600                                          discard_const_p(char *, kwnames),
 601                                          &fname, &security_info_sent, &py_sd,
 602                                          &service, &py_session)) {
 603                 TALLOC_FREE(frame);
 604                 return NULL;
 605         }
 606
 607         if (!py_check_dcerpc_type(py_sd, "samba.dcerpc.security", "descriptor")) {
 608                 TALLOC_FREE(frame);
 609                 return NULL;
 610         }
 611
 612         if (py_session != Py_None) {
 613                 if (!py_check_dcerpc_type(py_session,
 614                                           "samba.dcerpc.auth",
 615                                           "session_info")) {
 616                         TALLOC_FREE(frame);
 617                         return NULL;
 618                 }
 619                 session_info = pytalloc_get_type(py_session,
 620                                                  struct auth_session_info);
 621                 if (!session_info) {
 622                         PyErr_Format(PyExc_TypeError,
 623                                      "Expected auth_session_info for session_info argument got %s",
 624                                      pytalloc_get_name(py_session));
 625                         return NULL;
 626                 }
 627         }
 628
 629         conn = get_conn_tos(service, session_info);
 630         if (!conn) {
 631                 TALLOC_FREE(frame);
 632                 return NULL;
 633         }
 634
 635         sd = pytalloc_get_type(py_sd, struct security_descriptor);
 636
 637         status = set_nt_acl_conn(fname, security_info_sent, sd, conn);
 638         TALLOC_FREE(frame);
 639         PyErr_NTSTATUS_IS_ERR_RAISE(status);
 640
 641         Py_RETURN_NONE;
 642 }
 643
 644 /*
 645   Return the NT ACL on a file
 646  */
 647 static PyObject *py_smbd_get_nt_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 648 {
 649         const char * const kwnames[] = { "fname",
 650                                          "security_info_wanted",
 651                                          "service",
 652                                          "session_info",
 653                                          NULL };
 654         char *fname, *service = NULL;
 655         int security_info_wanted;
 656         PyObject *py_sd;
 657         struct security_descriptor *sd;
 658         TALLOC_CTX *frame = talloc_stackframe();
 659         PyObject *py_session = Py_None;
 660         struct auth_session_info *session_info = NULL;
 661         connection_struct *conn;
 662         NTSTATUS status;
 663         int ret = 1;
 664
 665         ret = PyArg_ParseTupleAndKeywords(args,
 666                                           kwargs,
 667                                           "si|zO",
 668                                           discard_const_p(char *, kwnames),
 669                                           &fname,
 670                                           &security_info_wanted,
 671                                           &service,
 672                                           &py_session);
 673         if (!ret) {
 674                 TALLOC_FREE(frame);
 675                 return NULL;
 676         }
 677
 678         if (py_session != Py_None) {
 679                 if (!py_check_dcerpc_type(py_session,
 680                                           "samba.dcerpc.auth",
 681                                           "session_info")) {
 682                         TALLOC_FREE(frame);
 683                         return NULL;
 684                 }
 685                 session_info = pytalloc_get_type(py_session,
 686                                                  struct auth_session_info);
 687                 if (!session_info) {
 688                         PyErr_Format(
 689                                 PyExc_TypeError,
 690                                 "Expected auth_session_info for "
 691                                 "session_info argument got %s",
 692                                 pytalloc_get_name(py_session));
 693                         return NULL;
 694                 }
 695         }
 696
 697         conn = get_conn_tos(service, session_info);
 698         if (!conn) {
 699                 TALLOC_FREE(frame);
 700                 return NULL;
 701         }
 702
 703         status = get_nt_acl_conn(frame, fname, conn, security_info_wanted, &sd);
 704         PyErr_NTSTATUS_IS_ERR_RAISE(status);
 705
 706         py_sd = py_return_ndr_struct("samba.dcerpc.security", "descriptor", sd, sd);
 707
 708         TALLOC_FREE(frame);
 709
 710         return py_sd;
 711 }
 712
 713 /*
 714   set the posix (or similar) ACL on a file
 715  */
 716 static PyObject *py_smbd_set_sys_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 717 {
 718         const char * const kwnames[] = { "fname", "acl_type", "acl", "service", NULL };
 719         TALLOC_CTX *frame = talloc_stackframe();
 720         int ret;
 721         char *fname, *service = NULL;
 722         PyObject *py_acl;
 723         struct smb_acl_t *acl;
 724         int acl_type;
 725         connection_struct *conn;
 726
 727         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "siO|z",
 728                                          discard_const_p(char *, kwnames),
 729                                          &fname, &acl_type, &py_acl, &service)) {
 730                 TALLOC_FREE(frame);
 731                 return NULL;
 732         }
 733
 734         if (!py_check_dcerpc_type(py_acl, "samba.dcerpc.smb_acl", "t")) {
 735                 TALLOC_FREE(frame);
 736                 return NULL;
 737         }
 738
 739         conn = get_conn_tos(service, NULL);
 740         if (!conn) {
 741                 TALLOC_FREE(frame);
 742                 return NULL;
 743         }
 744
 745         acl = pytalloc_get_type(py_acl, struct smb_acl_t);
 746
 747         ret = set_sys_acl_conn(fname, acl_type, acl, conn);
 748         if (ret != 0) {
 749                 TALLOC_FREE(frame);
 750                 errno = ret;
 751                 return PyErr_SetFromErrno(PyExc_OSError);
 752         }
 753
 754         TALLOC_FREE(frame);
 755         Py_RETURN_NONE;
 756 }
 757
 758 /*
 759   Return the posix (or similar) ACL on a file
 760  */
 761 static PyObject *py_smbd_get_sys_acl(PyObject *self, PyObject *args, PyObject *kwargs)
 762 {
 763         const char * const kwnames[] = { "fname", "acl_type", "service", NULL };
 764         char *fname;
 765         PyObject *py_acl;
 766         struct smb_acl_t *acl;
 767         int acl_type;
 768         TALLOC_CTX *frame = talloc_stackframe();
 769         connection_struct *conn;
 770         char *service = NULL;
 771         struct smb_filename *smb_fname = NULL;
 772
 773         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "si|z",
 774                                          discard_const_p(char *, kwnames),
 775                                          &fname, &acl_type, &service)) {
 776                 TALLOC_FREE(frame);
 777                 return NULL;
 778         }
 779
 780         conn = get_conn_tos(service, NULL);
 781         if (!conn) {
 782                 TALLOC_FREE(frame);
 783                 return NULL;
 784         }
 785
 786         smb_fname = synthetic_smb_fname_split(frame,
 787                                         fname,
 788                                         lp_posix_pathnames());
 789         if (smb_fname == NULL) {
 790                 TALLOC_FREE(frame);
 791                 return NULL;
 792         }
 793         acl = SMB_VFS_SYS_ACL_GET_FILE( conn, smb_fname, acl_type, frame);
 794         if (!acl) {
 795                 TALLOC_FREE(frame);
 796                 return PyErr_SetFromErrno(PyExc_OSError);
 797         }
 798
 799         py_acl = py_return_ndr_struct("samba.dcerpc.smb_acl", "t", acl, acl);
 800
 801         TALLOC_FREE(frame);
 802
 803         return py_acl;
 804 }
 805
 806 static PyObject *py_smbd_mkdir(PyObject *self, PyObject *args, PyObject *kwargs)
 807 {
 808         const char * const kwnames[] = { "fname", "service", NULL };
 809         char *fname, *service = NULL;
 810         TALLOC_CTX *frame = talloc_stackframe();
 811         struct connection_struct *conn = NULL;
 812         struct smb_filename *smb_fname = NULL;
 813         int ret;
 814         mode_t saved_umask;
 815
 816         if (!PyArg_ParseTupleAndKeywords(args,
 817                                          kwargs,
 818                                          "s|z",
 819                                          discard_const_p(char *,
 820                                                          kwnames),
 821                                          &fname,
 822                                          &service)) {
 823                 TALLOC_FREE(frame);
 824                 return NULL;
 825         }
 826
 827         conn = get_conn_tos(service, NULL);
 828         if (!conn) {
 829                 TALLOC_FREE(frame);
 830                 return NULL;
 831         }
 832
 833         smb_fname = synthetic_smb_fname(talloc_tos(),
 834                                         fname,
 835                                         NULL,
 836                                         NULL,
 837                                         lp_posix_pathnames() ?
 838                                         SMB_FILENAME_POSIX_PATH : 0);
 839
 840         if (smb_fname == NULL) {
 841                 TALLOC_FREE(frame);
 842                 return NULL;
 843         }
 844
 845         /* we want total control over the permissions on created files,
 846            so set our umask to 0 */
 847         saved_umask = umask(0);
 848
 849         ret = SMB_VFS_MKDIRAT(conn,
 850                         conn->cwd_fsp,
 851                         smb_fname,
 852                         00755);
 853
 854         umask(saved_umask);
 855
 856         if (ret == -1) {
 857                 DBG_ERR("mkdirat error=%d (%s)\n", errno, strerror(errno));
 858                 TALLOC_FREE(frame);
 859                 return NULL;
 860         }
 861
 862         TALLOC_FREE(frame);
 863         Py_RETURN_NONE;
 864 }
 865
 866
 867 /*
 868   Create an empty file
 869  */
 870 static PyObject *py_smbd_create_file(PyObject *self, PyObject *args, PyObject *kwargs)
 871 {
 872         const char * const kwnames[] = { "fname", "service", NULL };
 873         char *fname, *service = NULL;
 874         TALLOC_CTX *frame = talloc_stackframe();
 875         struct connection_struct *conn = NULL;
 876         struct files_struct *fsp = NULL;
 877         NTSTATUS status;
 878
 879         if (!PyArg_ParseTupleAndKeywords(args,
 880                                          kwargs,
 881                                          "s|z",
 882                                          discard_const_p(char *,
 883                                                          kwnames),
 884                                          &fname,
 885                                          &service)) {
 886                 TALLOC_FREE(frame);
 887                 return NULL;
 888         }
 889
 890         conn = get_conn_tos(service, NULL);
 891         if (!conn) {
 892                 TALLOC_FREE(frame);
 893                 return NULL;
 894         }
 895
 896         status = init_files_struct(frame,
 897                                    fname,
 898                                    conn,
 899                                    O_CREAT|O_EXCL|O_RDWR,
 900                                    &fsp);
 901         if (!NT_STATUS_IS_OK(status)) {
 902                 DBG_ERR("init_files_struct failed: %s\n",
 903                         nt_errstr(status));
 904         }
 905
 906         TALLOC_FREE(frame);
 907         Py_RETURN_NONE;
 908 }
 909
 910
 911 static PyMethodDef py_smbd_methods[] = {
 912         { "have_posix_acls",
 913                 (PyCFunction)py_smbd_have_posix_acls, METH_NOARGS,
 914                 NULL },
 915         { "set_simple_acl",
 916                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_set_simple_acl),
 917                 METH_VARARGS|METH_KEYWORDS,
 918                 NULL },
 919         { "set_nt_acl",
 920                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_set_nt_acl),
 921                 METH_VARARGS|METH_KEYWORDS,
 922                 NULL },
 923         { "get_nt_acl",
 924                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_get_nt_acl),
 925                 METH_VARARGS|METH_KEYWORDS,
 926                 NULL },
 927         { "get_sys_acl",
 928                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_get_sys_acl),
 929                 METH_VARARGS|METH_KEYWORDS,
 930                 NULL },
 931         { "set_sys_acl",
 932                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_set_sys_acl),
 933                 METH_VARARGS|METH_KEYWORDS,
 934                 NULL },
 935         { "chown",
 936                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_chown),
 937                 METH_VARARGS|METH_KEYWORDS,
 938                 NULL },
 939         { "unlink",
 940                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_unlink),
 941                 METH_VARARGS|METH_KEYWORDS,
 942                 NULL },
 943         { "mkdir",
 944                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_mkdir),
 945                 METH_VARARGS|METH_KEYWORDS,
 946                 NULL },
 947         { "create_file",
 948                 PY_DISCARD_FUNC_SIG(PyCFunction, py_smbd_create_file),
 949                 METH_VARARGS|METH_KEYWORDS,
 950                 NULL },
 951         { NULL }
 952 };
 953
 954 void initsmbd(void);
 955
 956 static struct PyModuleDef moduledef = {
 957     PyModuleDef_HEAD_INIT,
 958     .m_name = "smbd",
 959     .m_doc = "Python bindings for the smbd file server.",
 960     .m_size = -1,
 961     .m_methods = py_smbd_methods,
 962 };
 963
 964 MODULE_INIT_FUNC(smbd)
 965 {
 966         PyObject *m = NULL;
 967
 968         m = PyModule_Create(&moduledef);
 969         return m;
 970 }