source3/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 extern const struct generic_mapping file_generic_mapping;
  29
  30 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  31 typedef struct _SMB_ACE4_INT_T
  32 {
  33         uint32  magic;
  34         SMB_ACE4PROP_T  prop;
  35         void    *next;
  36 } SMB_ACE4_INT_T;
  37
  38 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  39 typedef struct _SMB_ACL4_INT_T
  40 {
  41         uint32  magic;
  42         uint32  naces;
  43         SMB_ACE4_INT_T  *first;
  44         SMB_ACE4_INT_T  *last;
  45 } SMB_ACL4_INT_T;
  46
  47 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  48 {
  49         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  50         if (theacl==NULL)
  51         {
  52                 DEBUG(2, ("acl is NULL\n"));
  53                 errno = EINVAL;
  54                 return NULL;
  55         }
  56         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  57         {
  58                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  59                 errno = EINVAL;
  60                 return NULL;
  61         }
  62         return aclint;
  63 }
  64
  65 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  66 {
  67         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  68         if (ace==NULL)
  69         {
  70                 DEBUG(2, ("ace is NULL\n"));
  71                 errno = EINVAL;
  72                 return NULL;
  73         }
  74         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  75         {
  76                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  77                 errno = EINVAL;
  78                 return NULL;
  79         }
  80         return aceint;
  81 }
  82
  83 SMB4ACL_T *smb_create_smb4acl(void)
  84 {
  85         TALLOC_CTX *mem_ctx = talloc_tos();
  86         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  87         if (theacl==NULL)
  88         {
  89                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  90                 errno = ENOMEM;
  91                 return NULL;
  92         }
  93         theacl->magic = SMB_ACL4_INT_MAGIC;
  94         /* theacl->first, last = NULL not needed */
  95         return (SMB4ACL_T *)theacl;
  96 }
  97
  98 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
  99 {
 100         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 101         TALLOC_CTX *mem_ctx = talloc_tos();
 102         SMB_ACE4_INT_T *ace;
 103
 104         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 105         if (ace==NULL)
 106         {
 107                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 108                 errno = ENOMEM;
 109                 return NULL;
 110         }
 111         ace->magic = SMB_ACE4_INT_MAGIC;
 112         /* ace->next = NULL not needed */
 113         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 114
 115         if (aclint->first==NULL)
 116         {
 117                 aclint->first = ace;
 118                 aclint->last = ace;
 119         } else {
 120                 aclint->last->next = (void *)ace;
 121                 aclint->last = ace;
 122         }
 123         aclint->naces++;
 124
 125         return (SMB4ACE_T *)ace;
 126 }
 127
 128 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 129 {
 130         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 131         if (aceint==NULL)
 132                 return NULL;
 133
 134         return &aceint->prop;
 135 }
 136
 137 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 138 {
 139         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 140         if (aceint==NULL)
 141                 return NULL;
 142
 143         return (SMB4ACE_T *)aceint->next;
 144 }
 145
 146 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 147 {
 148         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 149         if (aclint==NULL)
 150                 return NULL;
 151
 152         return (SMB4ACE_T *)aclint->first;
 153 }
 154
 155 uint32 smb_get_naces(SMB4ACL_T *theacl)
 156 {
 157         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 158         if (aclint==NULL)
 159                 return 0;
 160
 161         return aclint->naces;
 162 }
 163
 164 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 165                                 const char *filename,
 166                                 SMB_STRUCT_STAT *psbuf)
 167 {
 168         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 169
 170         /* Get the stat struct for the owner info. */
 171         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 172         {
 173                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 174                         strerror(errno)));
 175                 return -1;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 182 {
 183         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 184
 185         if (fsp->is_directory || fsp->fh->fd == -1) {
 186                 return smbacl4_GetFileOwner(fsp->conn,
 187                                             fsp->fsp_name->base_name, psbuf);
 188         }
 189         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 190         {
 191                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 192                         strerror(errno)));
 193                 return -1;
 194         }
 195
 196         return 0;
 197 }
 198
 199 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 200         DOM_SID *psid_owner, /* in */
 201         DOM_SID *psid_group, /* in */
 202         bool is_directory, /* in */
 203         SEC_ACE **ppnt_ace_list, /* out */
 204         int *pgood_aces /* out */
 205 )
 206 {
 207         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 208         SMB_ACE4_INT_T *aceint;
 209         SEC_ACE *nt_ace_list = NULL;
 210         int good_aces = 0;
 211
 212         DEBUG(10, ("smbacl_nfs42win entered\n"));
 213
 214         aclint = get_validated_aclint(theacl);
 215         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 216         /* in smb_get_nt_acl_nfs4(). */
 217         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 218         if (nt_ace_list==NULL)
 219         {
 220                 DEBUG(10, ("talloc error"));
 221                 errno = ENOMEM;
 222                 return False;
 223         }
 224
 225         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 226                 uint32_t mask;
 227                 DOM_SID sid;
 228                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 229                 uint32_t mapped_ace_flags;
 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                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 263                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 264                 }
 265
 266                 mapped_ace_flags = ace->aceFlags & 0xf;
 267                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 268                         /*
 269                          * GPFS sets inherits dir_inhert and file_inherit flags
 270                          * to files, too, which confuses windows, and seems to
 271                          * be wrong anyways. ==> Map these bits away for files.
 272                          */
 273                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 274                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 275                 }
 276                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 277                       ace->aceFlags, mapped_ace_flags));
 278
 279                 mask = ace->aceMask;
 280                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 281                         ace->aceType, mask,
 282                         mapped_ace_flags);
 283         }
 284
 285         *ppnt_ace_list = nt_ace_list;
 286         *pgood_aces = good_aces;
 287
 288         return True;
 289 }
 290
 291 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 292         uint32 security_info,
 293         SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 294 {
 295         int     good_aces = 0;
 296         DOM_SID sid_owner, sid_group;
 297         size_t sd_size = 0;
 298         SEC_ACE *nt_ace_list = NULL;
 299         SEC_ACL *psa = NULL;
 300         TALLOC_CTX *mem_ctx = talloc_tos();
 301
 302         if (theacl==NULL || smb_get_naces(theacl)==0)
 303                 return NT_STATUS_ACCESS_DENIED; /* special because we
 304                                                  * shouldn't alloc 0 for
 305                                                  * win */
 306
 307         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 308         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 309
 310         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 311                              S_ISDIR(sbuf->st_ex_mode),
 312                                 &nt_ace_list, &good_aces)==False) {
 313                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 314                 return map_nt_error_from_unix(errno);
 315         }
 316
 317         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 318         if (psa == NULL) {
 319                 DEBUG(2,("make_sec_acl failed\n"));
 320                 return NT_STATUS_NO_MEMORY;
 321         }
 322
 323         DEBUG(10,("after make sec_acl\n"));
 324         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 325                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 326                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 327                                 NULL, psa, &sd_size);
 328         if (*ppdesc==NULL) {
 329                 DEBUG(2,("make_sec_desc failed\n"));
 330                 return NT_STATUS_NO_MEMORY;
 331         }
 332
 333         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 334                    (int)ndr_size_security_descriptor(*ppdesc, NULL, 0)));
 335
 336         return NT_STATUS_OK;
 337 }
 338
 339 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 340                                uint32 security_info,
 341                                SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 342 {
 343         SMB_STRUCT_STAT sbuf;
 344
 345         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 346
 347         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 348                 return map_nt_error_from_unix(errno);
 349         }
 350
 351         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 352 }
 353
 354 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 355                               const char *name,
 356                               uint32 security_info,
 357                               SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 358 {
 359         SMB_STRUCT_STAT sbuf;
 360
 361         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 362
 363         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 364                 return map_nt_error_from_unix(errno);
 365         }
 366
 367         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 368 }
 369
 370 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 371 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 372
 373 typedef struct _smbacl4_vfs_params {
 374         enum smbacl4_mode_enum mode;
 375         bool do_chown;
 376         enum smbacl4_acedup_enum acedup;
 377         struct db_context *sid_mapping_table;
 378 } smbacl4_vfs_params;
 379
 380 /*
 381  * Gather special parameters for NFS4 ACL handling
 382  */
 383 static int smbacl4_get_vfs_params(
 384         const char *type_name,
 385         files_struct *fsp,
 386         smbacl4_vfs_params *params
 387 )
 388 {
 389         static const struct enum_list enum_smbacl4_modes[] = {
 390                 { e_simple, "simple" },
 391                 { e_special, "special" }
 392         };
 393         static const struct enum_list enum_smbacl4_acedups[] = {
 394                 { e_dontcare, "dontcare" },
 395                 { e_reject, "reject" },
 396                 { e_ignore, "ignore" },
 397                 { e_merge, "merge" },
 398         };
 399
 400         memset(params, 0, sizeof(smbacl4_vfs_params));
 401         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 402                 SNUM(fsp->conn), type_name,
 403                 "mode", enum_smbacl4_modes, e_simple);
 404         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 405                 "chown", True);
 406         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 407                 SNUM(fsp->conn), type_name,
 408                 "acedup", enum_smbacl4_acedups, e_dontcare);
 409
 410         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 411                 enum_smbacl4_modes[params->mode].name,
 412                 params->do_chown ? "true" : "false",
 413                 enum_smbacl4_acedups[params->acedup].name));
 414
 415         return 0;
 416 }
 417
 418 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 419 {
 420         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 421         SMB_ACE4_INT_T *aceint;
 422
 423         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 424
 425         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 426                 SMB_ACE4PROP_T *ace = &aceint->prop;
 427
 428                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 429                         ace->aceType,
 430                         ace->aceFlags, ace->flags,
 431                         ace->aceMask,
 432                         ace->who.id));
 433         }
 434 }
 435
 436 /*
 437  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 438  * match nonzero if "special" and who is equal
 439  * return ace if found matching; otherwise NULL
 440  */
 441 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 442         SMB4ACL_T *theacl,
 443         SMB_ACE4PROP_T *aceNew)
 444 {
 445         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 446         SMB_ACE4_INT_T *aceint;
 447
 448         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 449                 SMB_ACE4PROP_T *ace = &aceint->prop;
 450
 451                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 452                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 453                           ace->aceType, ace->flags, ace->aceFlags,
 454                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 455
 456                 if (ace->flags == aceNew->flags &&
 457                         ace->aceType==aceNew->aceType &&
 458                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 459                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 460                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 461                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 462                 ) {
 463                         /* keep type safety; e.g. gid is an u.short */
 464                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 465                         {
 466                                 if (ace->who.special_id==aceNew->who.special_id)
 467                                         return ace;
 468                         } else {
 469                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 470                                 {
 471                                         if (ace->who.gid==aceNew->who.gid)
 472                                                 return ace;
 473                                 } else {
 474                                         if (ace->who.uid==aceNew->who.uid)
 475                                                 return ace;
 476                                 }
 477                         }
 478                 }
 479         }
 480
 481         return NULL;
 482 }
 483
 484 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 485                          DOM_SID *dst)
 486 {
 487         static struct db_context *mapping_db = NULL;
 488         TDB_DATA data;
 489
 490         if (mapping_db == NULL) {
 491                 const char *dbname = lp_parm_const_string(
 492                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 493
 494                 if (dbname == NULL) {
 495                         DEBUG(10, ("%s:sidmap not defined\n",
 496                                    SMBACL4_PARAM_TYPE_NAME));
 497                         return False;
 498                 }
 499
 500                 become_root();
 501                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 502                                      O_RDONLY, 0600);
 503                 unbecome_root();
 504
 505                 if (mapping_db == NULL) {
 506                         DEBUG(1, ("could not open sidmap: %s\n",
 507                                   strerror(errno)));
 508                         return False;
 509                 }
 510         }
 511
 512         if (mapping_db->fetch(mapping_db, NULL,
 513                               string_term_tdb_data(sid_string_tos(src)),
 514                               &data) == -1) {
 515                 DEBUG(10, ("could not find mapping for SID %s\n",
 516                            sid_string_dbg(src)));
 517                 return False;
 518         }
 519
 520         if ((data.dptr == NULL) || (data.dsize <= 0)
 521             || (data.dptr[data.dsize-1] != '\0')) {
 522                 DEBUG(5, ("invalid mapping for SID %s\n",
 523                           sid_string_dbg(src)));
 524                 TALLOC_FREE(data.dptr);
 525                 return False;
 526         }
 527
 528         if (!string_to_sid(dst, (char *)data.dptr)) {
 529                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 530                           (char *)data.dptr, sid_string_dbg(src)));
 531                 TALLOC_FREE(data.dptr);
 532                 return False;
 533         }
 534
 535         TALLOC_FREE(data.dptr);
 536
 537         return True;
 538 }
 539
 540 static bool smbacl4_fill_ace4(
 541         TALLOC_CTX *mem_ctx,
 542         const char *filename,
 543         smbacl4_vfs_params *params,
 544         uid_t ownerUID,
 545         gid_t ownerGID,
 546         const SEC_ACE *ace_nt, /* input */
 547         SMB_ACE4PROP_T *ace_v4 /* output */
 548 )
 549 {
 550         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 551
 552         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 553         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 554         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 555         ace_v4->aceMask = ace_nt->access_mask &
 556                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 557
 558         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 559
 560         if (ace_v4->aceFlags!=ace_nt->flags)
 561                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 562                         ace_v4->aceFlags, ace_nt->flags));
 563
 564         if (ace_v4->aceMask!=ace_nt->access_mask)
 565                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 566                         ace_v4->aceMask, ace_nt->access_mask));
 567
 568         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 569                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 570                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 571         } else {
 572                 const char *dom, *name;
 573                 enum lsa_SidType type;
 574                 uid_t uid;
 575                 gid_t gid;
 576                 DOM_SID sid;
 577
 578                 sid_copy(&sid, &ace_nt->trustee);
 579
 580                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 581
 582                         DOM_SID mapped;
 583
 584                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 585                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 586                                           "unknown\n", filename, sid_string_dbg(&sid)));
 587                                 errno = EINVAL;
 588                                 return False;
 589                         }
 590
 591                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 592                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 593
 594                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 595                                         &name, &type)) {
 596                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 597                                           "mapped from %s is unknown\n",
 598                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 599                                 errno = EINVAL;
 600                                 return False;
 601                         }
 602
 603                         sid_copy(&sid, &mapped);
 604                 }
 605
 606                 if (type == SID_NAME_USER) {
 607                         if (!sid_to_uid(&sid, &uid)) {
 608                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 609                                           "convert %s to uid\n", filename,
 610                                           sid_string_dbg(&sid)));
 611                                 return False;
 612                         }
 613
 614                         if (params->mode==e_special && uid==ownerUID) {
 615                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 616                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 617                         } else {
 618                                 ace_v4->who.uid = uid;
 619                         }
 620                 } else { /* else group? - TODO check it... */
 621                         if (!sid_to_gid(&sid, &gid)) {
 622                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 623                                           "convert %s to gid\n", filename,
 624                                           sid_string_dbg(&sid)));
 625                                 return False;
 626                         }
 627
 628                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 629
 630                         if (params->mode==e_special && gid==ownerGID) {
 631                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 632                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 633                         } else {
 634                                 ace_v4->who.gid = gid;
 635                         }
 636                 }
 637         }
 638
 639         return True; /* OK */
 640 }
 641
 642 static int smbacl4_MergeIgnoreReject(
 643         enum smbacl4_acedup_enum acedup,
 644         SMB4ACL_T *theacl, /* may modify it */
 645         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 646         bool    *paddNewACE,
 647         int     i
 648 )
 649 {
 650         int     result = 0;
 651         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 652         if (ace4found)
 653         {
 654                 switch(acedup)
 655                 {
 656                 case e_merge: /* "merge" flags */
 657                         *paddNewACE = False;
 658                         ace4found->aceFlags |= ace->aceFlags;
 659                         ace4found->aceMask |= ace->aceMask;
 660                         break;
 661                 case e_ignore: /* leave out this record */
 662                         *paddNewACE = False;
 663                         break;
 664                 case e_reject: /* do an error */
 665                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 666                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 667                         result = -1;
 668                         break;
 669                 default:
 670                         break;
 671                 }
 672         }
 673         return result;
 674 }
 675
 676 static SMB4ACL_T *smbacl4_win2nfs4(
 677         const char *filename,
 678         const SEC_ACL *dacl,
 679         smbacl4_vfs_params *pparams,
 680         uid_t ownerUID,
 681         gid_t ownerGID
 682 )
 683 {
 684         SMB4ACL_T *theacl;
 685         uint32  i;
 686         TALLOC_CTX *mem_ctx = talloc_tos();
 687
 688         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 689
 690         theacl = smb_create_smb4acl();
 691         if (theacl==NULL)
 692                 return NULL;
 693
 694         for(i=0; i<dacl->num_aces; i++) {
 695                 SMB_ACE4PROP_T  ace_v4;
 696                 bool    addNewACE = True;
 697
 698                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 699                                        ownerUID, ownerGID,
 700                                        dacl->aces + i, &ace_v4)) {
 701                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 702                                   filename,
 703                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 704                         continue;
 705                 }
 706
 707                 if (pparams->acedup!=e_dontcare) {
 708                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 709                                 &ace_v4, &addNewACE, i))
 710                                 return NULL;
 711                 }
 712
 713                 if (addNewACE)
 714                         smb_add_ace4(theacl, &ace_v4);
 715         }
 716
 717         return theacl;
 718 }
 719
 720 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 721         uint32 security_info_sent,
 722         const SEC_DESC *psd,
 723         set_nfs4acl_native_fn_t set_nfs4_native)
 724 {
 725         smbacl4_vfs_params params;
 726         SMB4ACL_T *theacl = NULL;
 727         bool    result;
 728
 729         SMB_STRUCT_STAT sbuf;
 730         bool set_acl_as_root = false;
 731         uid_t newUID = (uid_t)-1;
 732         gid_t newGID = (gid_t)-1;
 733         int saved_errno;
 734
 735         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 736
 737         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 738                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 739         {
 740                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 741                         security_info_sent));
 742                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 743         }
 744
 745         /* Special behaviours */
 746         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 747                 return NT_STATUS_NO_MEMORY;
 748
 749         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 750                 return map_nt_error_from_unix(errno);
 751
 752         if (params.do_chown) {
 753                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 754                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 755                 if (!NT_STATUS_IS_OK(status)) {
 756                         DEBUG(8, ("unpack_nt_owners failed"));
 757                         return status;
 758                 }
 759                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 760                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 761
 762                         if(try_chown(fsp->conn, fsp->fsp_name, newUID,
 763                                      newGID)) {
 764                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 765                                          "%s.\n", fsp_str_dbg(fsp),
 766                                          (unsigned int)newUID,
 767                                          (unsigned int)newGID,
 768                                          strerror(errno)));
 769                                 return map_nt_error_from_unix(errno);
 770                         }
 771
 772                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 773                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 774                                   (unsigned int)newGID));
 775                         if (smbacl4_GetFileOwner(fsp->conn,
 776                                                  fsp->fsp_name->base_name,
 777                                                  &sbuf))
 778                                 return map_nt_error_from_unix(errno);
 779
 780                         /* If we successfully chowned, we know we must
 781                          * be able to set the acl, so do it as root.
 782                          */
 783                         set_acl_as_root = true;
 784                 }
 785         }
 786
 787         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 788                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 789                 return NT_STATUS_OK;
 790         }
 791
 792         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 793                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 794         if (!theacl)
 795                 return map_nt_error_from_unix(errno);
 796
 797         smbacl4_dump_nfs4acl(10, theacl);
 798
 799         if (set_acl_as_root) {
 800                 become_root();
 801         }
 802         result = set_nfs4_native(fsp, theacl);
 803         saved_errno = errno;
 804         if (set_acl_as_root) {
 805                 unbecome_root();
 806         }
 807         if (result!=True) {
 808                 errno = saved_errno;
 809                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 810                 return map_nt_error_from_unix(errno);
 811         }
 812
 813         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 814         return NT_STATUS_OK;
 815 }