source/modules/nfs4_acls.c

   1 /*
   2  * NFS4 ACL handling
   3  *
   4  * Copyright (C) Jim McDonough, 2006
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "nfs4_acls.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_ACLS
  25
  26 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  27
  28 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  29 typedef struct _SMB_ACE4_INT_T
  30 {
  31         uint32  magic;
  32         SMB_ACE4PROP_T  prop;
  33         void    *next;
  34 } SMB_ACE4_INT_T;
  35
  36 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  37 typedef struct _SMB_ACL4_INT_T
  38 {
  39         uint32  magic;
  40         uint32  naces;
  41         SMB_ACE4_INT_T  *first;
  42         SMB_ACE4_INT_T  *last;
  43 } SMB_ACL4_INT_T;
  44
  45 extern struct current_user current_user;
  46 extern int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid);
  47 extern NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp,
  48         uint32 security_info_sent, SEC_DESC *psd);
  49
  50 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *acl)
  51 {
  52         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
  53         if (acl==NULL)
  54         {
  55                 DEBUG(2, ("acl is NULL\n"));
  56                 errno = EINVAL;
  57                 return NULL;
  58         }
  59         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  60         {
  61                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  62                 errno = EINVAL;
  63                 return NULL;
  64         }
  65         return aclint;
  66 }
  67
  68 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  69 {
  70         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  71         if (ace==NULL)
  72         {
  73                 DEBUG(2, ("ace is NULL\n"));
  74                 errno = EINVAL;
  75                 return NULL;
  76         }
  77         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  78         {
  79                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  80                 errno = EINVAL;
  81                 return NULL;
  82         }
  83         return aceint;
  84 }
  85
  86 SMB4ACL_T *smb_create_smb4acl(void)
  87 {
  88         TALLOC_CTX *mem_ctx = talloc_tos();
  89         SMB_ACL4_INT_T  *acl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  90         if (acl==NULL)
  91         {
  92                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  93                 errno = ENOMEM;
  94                 return NULL;
  95         }
  96         acl->magic = SMB_ACL4_INT_MAGIC;
  97         /* acl->first, last = NULL not needed */
  98         return (SMB4ACL_T *)acl;
  99 }
 100
 101 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
 102 {
 103         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 104         TALLOC_CTX *mem_ctx = talloc_tos();
 105         SMB_ACE4_INT_T *ace;
 106
 107         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 108         if (ace==NULL)
 109         {
 110                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 111                 errno = ENOMEM;
 112                 return NULL;
 113         }
 114         ace->magic = SMB_ACE4_INT_MAGIC;
 115         /* ace->next = NULL not needed */
 116         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 117
 118         if (aclint->first==NULL)
 119         {
 120                 aclint->first = ace;
 121                 aclint->last = ace;
 122         } else {
 123                 aclint->last->next = (void *)ace;
 124                 aclint->last = ace;
 125         }
 126         aclint->naces++;
 127
 128         return (SMB4ACE_T *)ace;
 129 }
 130
 131 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 132 {
 133         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 134         if (aceint==NULL)
 135                 return NULL;
 136
 137         return &aceint->prop;
 138 }
 139
 140 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 141 {
 142         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 143         if (aceint==NULL)
 144                 return NULL;
 145
 146         return (SMB4ACE_T *)aceint->next;
 147 }
 148
 149 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *acl)
 150 {
 151         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 152         if (aclint==NULL)
 153                 return NULL;
 154
 155         return (SMB4ACE_T *)aclint->first;
 156 }
 157
 158 uint32 smb_get_naces(SMB4ACL_T *acl)
 159 {
 160         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 161         if (aclint==NULL)
 162                 return 0;
 163
 164         return aclint->naces;
 165 }
 166
 167 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 168                                 const char *filename,
 169                                 SMB_STRUCT_STAT *psbuf)
 170 {
 171         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 172
 173         /* Get the stat struct for the owner info. */
 174         if (SMB_VFS_STAT(conn, filename, psbuf) != 0)
 175         {
 176                 DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
 177                         strerror(errno)));
 178                 return -1;
 179         }
 180
 181         return 0;
 182 }
 183
 184 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 185 {
 186         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 187
 188         if (fsp->is_directory || fsp->fh->fd == -1) {
 189                 return smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, psbuf);
 190         }
 191         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 192         {
 193                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 194                         strerror(errno)));
 195                 return -1;
 196         }
 197
 198         return 0;
 199 }
 200
 201 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *acl, /* in */
 202         DOM_SID *psid_owner, /* in */
 203         DOM_SID *psid_group, /* in */
 204         SEC_ACE **ppnt_ace_list, /* out */
 205         int *pgood_aces /* out */
 206 )
 207 {
 208         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
 209         SMB_ACE4_INT_T *aceint;
 210         SEC_ACE *nt_ace_list = NULL;
 211         int good_aces = 0;
 212
 213         DEBUG(10, ("smbacl_nfs42win entered"));
 214
 215         aclint = get_validated_aclint(acl);
 216         /* We do not check for naces being 0 or acl being NULL here because it is done upstream */
 217         /* in smb_get_nt_acl_nfs4(). */
 218         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 219         if (nt_ace_list==NULL)
 220         {
 221                 DEBUG(10, ("talloc error"));
 222                 errno = ENOMEM;
 223                 return False;
 224         }
 225
 226         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 227                 SEC_ACCESS mask;
 228                 DOM_SID sid;
 229                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 230
 231                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 232                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 233                         ace->aceFlags, ace->aceMask, ace->who.id));
 234
 235                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 236
 237                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 238                         switch (ace->who.special_id) {
 239                         case SMB_ACE4_WHO_OWNER:
 240                                 sid_copy(&sid, psid_owner);
 241                                 break;
 242                         case SMB_ACE4_WHO_GROUP:
 243                                 sid_copy(&sid, psid_group);
 244                                 break;
 245                         case SMB_ACE4_WHO_EVERYONE:
 246                                 sid_copy(&sid, &global_sid_World);
 247                                 break;
 248                         default:
 249                                 DEBUG(8, ("invalid special who id %d "
 250                                         "ignored\n", ace->who.special_id));
 251                         }
 252                 } else {
 253                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 254                                 gid_to_sid(&sid, ace->who.gid);
 255                         } else {
 256                                 uid_to_sid(&sid, ace->who.uid);
 257                         }
 258                 }
 259                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 260                            sid_string_dbg(&sid)));
 261
 262                 init_sec_access(&mask, ace->aceMask);
 263                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 264                         ace->aceType, mask,
 265                         ace->aceFlags & 0xf);
 266         }
 267
 268         *ppnt_ace_list = nt_ace_list;
 269         *pgood_aces = good_aces;
 270
 271         return True;
 272 }
 273
 274 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 275         uint32 security_info,
 276         SEC_DESC **ppdesc, SMB4ACL_T *acl)
 277 {
 278         int     good_aces = 0;
 279         DOM_SID sid_owner, sid_group;
 280         size_t sd_size = 0;
 281         SEC_ACE *nt_ace_list = NULL;
 282         SEC_ACL *psa = NULL;
 283         TALLOC_CTX *mem_ctx = talloc_tos();
 284
 285         if (acl==NULL || smb_get_naces(acl)==0)
 286                 return NT_STATUS_ACCESS_DENIED; /* special because we
 287                                                  * shouldn't alloc 0 for
 288                                                  * win */
 289
 290         uid_to_sid(&sid_owner, sbuf->st_uid);
 291         gid_to_sid(&sid_group, sbuf->st_gid);
 292
 293         if (smbacl4_nfs42win(mem_ctx, acl, &sid_owner, &sid_group, &nt_ace_list, &good_aces)==False) {
 294                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 295                 return map_nt_error_from_unix(errno);
 296         }
 297
 298         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 299         if (psa == NULL) {
 300                 DEBUG(2,("make_sec_acl failed\n"));
 301                 return NT_STATUS_NO_MEMORY;
 302         }
 303
 304         DEBUG(10,("after make sec_acl\n"));
 305         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 306                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 307                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 308                                 NULL, psa, &sd_size);
 309         if (*ppdesc==NULL) {
 310                 DEBUG(2,("make_sec_desc failed\n"));
 311                 return NT_STATUS_NO_MEMORY;
 312         }
 313
 314         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 315                    ndr_size_security_descriptor(*ppdesc, 0)));
 316
 317         return NT_STATUS_OK;
 318 }
 319
 320 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 321                                uint32 security_info,
 322                                SEC_DESC **ppdesc, SMB4ACL_T *acl)
 323 {
 324         SMB_STRUCT_STAT sbuf;
 325
 326         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 327
 328         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 329                 return map_nt_error_from_unix(errno);
 330         }
 331
 332         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
 333 }
 334
 335 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 336                               const char *name,
 337                               uint32 security_info,
 338                               SEC_DESC **ppdesc, SMB4ACL_T *acl)
 339 {
 340         SMB_STRUCT_STAT sbuf;
 341
 342         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 343
 344         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 345                 return map_nt_error_from_unix(errno);
 346         }
 347
 348         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
 349 }
 350
 351 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 352 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 353
 354 typedef struct _smbacl4_vfs_params {
 355         enum smbacl4_mode_enum mode;
 356         bool do_chown;
 357         enum smbacl4_acedup_enum acedup;
 358         struct db_context *sid_mapping_table;
 359 } smbacl4_vfs_params;
 360
 361 /*
 362  * Gather special parameters for NFS4 ACL handling
 363  */
 364 static int smbacl4_get_vfs_params(
 365         const char *type_name,
 366         files_struct *fsp,
 367         smbacl4_vfs_params *params
 368 )
 369 {
 370         static const struct enum_list enum_smbacl4_modes[] = {
 371                 { e_simple, "simple" },
 372                 { e_special, "special" }
 373         };
 374         static const struct enum_list enum_smbacl4_acedups[] = {
 375                 { e_dontcare, "dontcare" },
 376                 { e_reject, "reject" },
 377                 { e_ignore, "ignore" },
 378                 { e_merge, "merge" },
 379         };
 380
 381         memset(params, 0, sizeof(smbacl4_vfs_params));
 382         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 383                 SNUM(fsp->conn), type_name,
 384                 "mode", enum_smbacl4_modes, e_simple);
 385         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 386                 "chown", True);
 387         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 388                 SNUM(fsp->conn), type_name,
 389                 "acedup", enum_smbacl4_acedups, e_dontcare);
 390
 391         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 392                 enum_smbacl4_modes[params->mode].name,
 393                 params->do_chown ? "true" : "false",
 394                 enum_smbacl4_acedups[params->acedup].name));
 395
 396         return 0;
 397 }
 398
 399 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *acl)
 400 {
 401         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 402         SMB_ACE4_INT_T *aceint;
 403
 404         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 405
 406         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 407                 SMB_ACE4PROP_T *ace = &aceint->prop;
 408
 409                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 410                         ace->aceType,
 411                         ace->aceFlags, ace->flags,
 412                         ace->aceMask,
 413                         ace->who.id));
 414         }
 415 }
 416
 417 /*
 418  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 419  * match nonzero if "special" and who is equal
 420  * return ace if found matching; otherwise NULL
 421  */
 422 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 423         SMB4ACL_T *acl,
 424         SMB_ACE4PROP_T *aceNew)
 425 {
 426         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 427         SMB_ACE4_INT_T *aceint;
 428
 429         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 430                 SMB_ACE4PROP_T *ace = &aceint->prop;
 431
 432                 if (ace->flags == aceNew->flags &&
 433                         ace->aceType==aceNew->aceType &&
 434                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 435                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 436                 ) {
 437                         /* keep type safety; e.g. gid is an u.short */
 438                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 439                         {
 440                                 if (ace->who.special_id==aceNew->who.special_id)
 441                                         return ace;
 442                         } else {
 443                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 444                                 {
 445                                         if (ace->who.gid==aceNew->who.gid)
 446                                                 return ace;
 447                                 } else {
 448                                         if (ace->who.uid==aceNew->who.uid)
 449                                                 return ace;
 450                                 }
 451                         }
 452                 }
 453         }
 454
 455         return NULL;
 456 }
 457
 458 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 459                          DOM_SID *dst)
 460 {
 461         static struct db_context *mapping_db = NULL;
 462         TDB_DATA data;
 463
 464         if (mapping_db == NULL) {
 465                 const char *dbname = lp_parm_const_string(
 466                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 467
 468                 if (dbname == NULL) {
 469                         DEBUG(10, ("%s:sidmap not defined\n",
 470                                    SMBACL4_PARAM_TYPE_NAME));
 471                         return False;
 472                 }
 473
 474                 become_root();
 475                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 476                                      O_RDONLY, 0600);
 477                 unbecome_root();
 478
 479                 if (mapping_db == NULL) {
 480                         DEBUG(1, ("could not open sidmap: %s\n",
 481                                   strerror(errno)));
 482                         return False;
 483                 }
 484         }
 485
 486         if (mapping_db->fetch(mapping_db, NULL,
 487                               string_term_tdb_data(sid_string_tos(src)),
 488                               &data) == -1) {
 489                 DEBUG(10, ("could not find mapping for SID %s\n",
 490                            sid_string_dbg(src)));
 491                 return False;
 492         }
 493
 494         if ((data.dptr == NULL) || (data.dsize <= 0)
 495             || (data.dptr[data.dsize-1] != '\0')) {
 496                 DEBUG(5, ("invalid mapping for SID %s\n",
 497                           sid_string_dbg(src)));
 498                 TALLOC_FREE(data.dptr);
 499                 return False;
 500         }
 501
 502         if (!string_to_sid(dst, (char *)data.dptr)) {
 503                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 504                           (char *)data.dptr, sid_string_dbg(src)));
 505                 TALLOC_FREE(data.dptr);
 506                 return False;
 507         }
 508
 509         TALLOC_FREE(data.dptr);
 510
 511         return True;
 512 }
 513
 514 static bool smbacl4_fill_ace4(
 515         TALLOC_CTX *mem_ctx,
 516         const char *filename,
 517         smbacl4_vfs_params *params,
 518         uid_t ownerUID,
 519         gid_t ownerGID,
 520         SEC_ACE *ace_nt, /* input */
 521         SMB_ACE4PROP_T *ace_v4 /* output */
 522 )
 523 {
 524         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 525
 526         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 527         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 528         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 529         ace_v4->aceMask = ace_nt->access_mask &
 530                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 531
 532         if (ace_v4->aceFlags!=ace_nt->flags)
 533                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 534                         ace_v4->aceFlags, ace_nt->flags));
 535
 536         if (ace_v4->aceMask!=ace_nt->access_mask)
 537                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 538                         ace_v4->aceMask, ace_nt->access_mask));
 539
 540         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 541                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 542                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 543         } else {
 544                 const char *dom, *name;
 545                 enum lsa_SidType type;
 546                 uid_t uid;
 547                 gid_t gid;
 548                 DOM_SID sid;
 549
 550                 sid_copy(&sid, &ace_nt->trustee);
 551
 552                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 553
 554                         DOM_SID mapped;
 555
 556                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 557                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 558                                           "unknown\n", filename, sid_string_dbg(&sid)));
 559                                 errno = EINVAL;
 560                                 return False;
 561                         }
 562
 563                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 564                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 565
 566                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 567                                         &name, &type)) {
 568                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 569                                           "mapped from %s is unknown\n",
 570                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 571                                 errno = EINVAL;
 572                                 return False;
 573                         }
 574
 575                         sid_copy(&sid, &mapped);
 576                 }
 577
 578                 if (type == SID_NAME_USER) {
 579                         if (!sid_to_uid(&sid, &uid)) {
 580                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 581                                           "convert %s to uid\n", filename,
 582                                           sid_string_dbg(&sid)));
 583                                 return False;
 584                         }
 585
 586                         if (params->mode==e_special && uid==ownerUID) {
 587                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 588                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 589                         } else {
 590                                 ace_v4->who.uid = uid;
 591                         }
 592                 } else { /* else group? - TODO check it... */
 593                         if (!sid_to_gid(&sid, &gid)) {
 594                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 595                                           "convert %s to gid\n", filename,
 596                                           sid_string_dbg(&sid)));
 597                                 return False;
 598                         }
 599
 600                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 601
 602                         if (params->mode==e_special && gid==ownerGID) {
 603                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 604                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 605                         } else {
 606                                 ace_v4->who.gid = gid;
 607                         }
 608                 }
 609         }
 610
 611         return True; /* OK */
 612 }
 613
 614 static int smbacl4_MergeIgnoreReject(
 615         enum smbacl4_acedup_enum acedup,
 616         SMB4ACL_T *acl, /* may modify it */
 617         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 618         bool    *paddNewACE,
 619         int     i
 620 )
 621 {
 622         int     result = 0;
 623         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(acl, ace);
 624         if (ace4found)
 625         {
 626                 switch(acedup)
 627                 {
 628                 case e_merge: /* "merge" flags */
 629                         *paddNewACE = False;
 630                         ace4found->aceFlags |= ace->aceFlags;
 631                         ace4found->aceMask |= ace->aceMask;
 632                         break;
 633                 case e_ignore: /* leave out this record */
 634                         *paddNewACE = False;
 635                         break;
 636                 case e_reject: /* do an error */
 637                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 638                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 639                         result = -1;
 640                         break;
 641                 default:
 642                         break;
 643                 }
 644         }
 645         return result;
 646 }
 647
 648 static SMB4ACL_T *smbacl4_win2nfs4(
 649         const char *filename,
 650         SEC_ACL *dacl,
 651         smbacl4_vfs_params *pparams,
 652         uid_t ownerUID,
 653         gid_t ownerGID
 654 )
 655 {
 656         SMB4ACL_T *acl;
 657         uint32  i;
 658         TALLOC_CTX *mem_ctx = talloc_tos();
 659
 660         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 661
 662         acl = smb_create_smb4acl();
 663         if (acl==NULL)
 664                 return NULL;
 665
 666         for(i=0; i<dacl->num_aces; i++) {
 667                 SMB_ACE4PROP_T  ace_v4;
 668                 bool    addNewACE = True;
 669
 670                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 671                                        ownerUID, ownerGID,
 672                                        dacl->aces + i, &ace_v4)) {
 673                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 674                                   filename,
 675                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 676                         continue;
 677                 }
 678
 679                 if (pparams->acedup!=e_dontcare) {
 680                         if (smbacl4_MergeIgnoreReject(pparams->acedup, acl,
 681                                 &ace_v4, &addNewACE, i))
 682                                 return NULL;
 683                 }
 684
 685                 if (addNewACE)
 686                         smb_add_ace4(acl, &ace_v4);
 687         }
 688
 689         return acl;
 690 }
 691
 692 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 693         uint32 security_info_sent,
 694         SEC_DESC *psd,
 695         set_nfs4acl_native_fn_t set_nfs4_native)
 696 {
 697         smbacl4_vfs_params params;
 698         SMB4ACL_T *acl = NULL;
 699         bool    result;
 700
 701         SMB_STRUCT_STAT sbuf;
 702         bool need_chown = False;
 703         uid_t newUID = (uid_t)-1;
 704         gid_t newGID = (gid_t)-1;
 705
 706         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 707
 708         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 709                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 710         {
 711                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 712                         security_info_sent));
 713                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 714         }
 715
 716         /* Special behaviours */
 717         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 718                 return NT_STATUS_NO_MEMORY;
 719
 720         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 721                 return map_nt_error_from_unix(errno);
 722
 723         if (params.do_chown) {
 724                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 725                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 726                 if (!NT_STATUS_IS_OK(status)) {
 727                         DEBUG(8, ("unpack_nt_owners failed"));
 728                         return status;
 729                 }
 730                 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
 731                     ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
 732                         need_chown = True;
 733                 }
 734                 if (need_chown) {
 735                         if ((newUID == (uid_t)-1 || newUID == current_user.ut.uid)) {
 736                                 if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 737                                         DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 738                                                  fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
 739                                                  strerror(errno)));
 740                                         return map_nt_error_from_unix(errno);
 741                                 }
 742
 743                                 DEBUG(10,("chown %s, %u, %u succeeded.\n",
 744                                           fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 745                                 if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
 746                                         return map_nt_error_from_unix(errno);
 747                                 need_chown = False;
 748                         } else { /* chown is needed, but _after_ changing acl */
 749                                 sbuf.st_uid = newUID; /* OWNER@ in case of e_special */
 750                                 sbuf.st_gid = newGID; /* GROUP@ in case of e_special */
 751                         }
 752                 }
 753         }
 754
 755         if ((security_info_sent & DACL_SECURITY_INFORMATION)!=0 && psd->dacl!=NULL)
 756         {
 757                 acl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
 758                 if (!acl)
 759                         return map_nt_error_from_unix(errno);
 760
 761                 smbacl4_dump_nfs4acl(10, acl);
 762
 763                 result = set_nfs4_native(fsp, acl);
 764                 if (result!=True)
 765                 {
 766                         DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 767                         return map_nt_error_from_unix(errno);
 768                 }
 769         } else
 770                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 771
 772         /* Any chown pending? */
 773         if (need_chown) {
 774                 DEBUG(3,("chown#2 %s. uid = %u, gid = %u.\n",
 775                          fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 776                 if (try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 777                         DEBUG(2,("chown#2 %s, %u, %u failed. Error = %s.\n",
 778                                  fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
 779                                  strerror(errno)));
 780                         return map_nt_error_from_unix(errno);
 781                 }
 782                 DEBUG(10,("chown#2 %s, %u, %u succeeded.\n",
 783                           fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 784         }
 785
 786         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 787         return NT_STATUS_OK;
 788 }