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 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 (SMB_VFS_STAT(conn, filename, psbuf) != 0)
 172         {
 173                 DEBUG(8, ("SMB_VFS_STAT 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, fsp->fsp_name, psbuf);
 187         }
 188         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 189         {
 190                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 191                         strerror(errno)));
 192                 return -1;
 193         }
 194
 195         return 0;
 196 }
 197
 198 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 199         DOM_SID *psid_owner, /* in */
 200         DOM_SID *psid_group, /* in */
 201         bool is_directory, /* in */
 202         SEC_ACE **ppnt_ace_list, /* out */
 203         int *pgood_aces /* out */
 204 )
 205 {
 206         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 207         SMB_ACE4_INT_T *aceint;
 208         SEC_ACE *nt_ace_list = NULL;
 209         int good_aces = 0;
 210
 211         DEBUG(10, ("smbacl_nfs42win entered"));
 212
 213         aclint = get_validated_aclint(theacl);
 214         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 215         /* in smb_get_nt_acl_nfs4(). */
 216         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 217         if (nt_ace_list==NULL)
 218         {
 219                 DEBUG(10, ("talloc error"));
 220                 errno = ENOMEM;
 221                 return False;
 222         }
 223
 224         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 225                 uint32_t mask;
 226                 DOM_SID sid;
 227                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 228
 229                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 230                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 231                         ace->aceFlags, ace->aceMask, ace->who.id));
 232
 233                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 234
 235                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 236                         switch (ace->who.special_id) {
 237                         case SMB_ACE4_WHO_OWNER:
 238                                 sid_copy(&sid, psid_owner);
 239                                 break;
 240                         case SMB_ACE4_WHO_GROUP:
 241                                 sid_copy(&sid, psid_group);
 242                                 break;
 243                         case SMB_ACE4_WHO_EVERYONE:
 244                                 sid_copy(&sid, &global_sid_World);
 245                                 break;
 246                         default:
 247                                 DEBUG(8, ("invalid special who id %d "
 248                                         "ignored\n", ace->who.special_id));
 249                         }
 250                 } else {
 251                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 252                                 gid_to_sid(&sid, ace->who.gid);
 253                         } else {
 254                                 uid_to_sid(&sid, ace->who.uid);
 255                         }
 256                 }
 257                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 258                            sid_string_dbg(&sid)));
 259
 260                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 261                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 262                 }
 263
 264                 mask = ace->aceMask;
 265                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 266                         ace->aceType, mask,
 267                         ace->aceFlags & 0xf);
 268         }
 269
 270         *ppnt_ace_list = nt_ace_list;
 271         *pgood_aces = good_aces;
 272
 273         return True;
 274 }
 275
 276 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 277         uint32 security_info,
 278         SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 279 {
 280         int     good_aces = 0;
 281         DOM_SID sid_owner, sid_group;
 282         size_t sd_size = 0;
 283         SEC_ACE *nt_ace_list = NULL;
 284         SEC_ACL *psa = NULL;
 285         TALLOC_CTX *mem_ctx = talloc_tos();
 286
 287         if (theacl==NULL || smb_get_naces(theacl)==0)
 288                 return NT_STATUS_ACCESS_DENIED; /* special because we
 289                                                  * shouldn't alloc 0 for
 290                                                  * win */
 291
 292         uid_to_sid(&sid_owner, sbuf->st_uid);
 293         gid_to_sid(&sid_group, sbuf->st_gid);
 294
 295         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group, S_ISDIR(sbuf->st_mode),
 296                                 &nt_ace_list, &good_aces)==False) {
 297                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 298                 return map_nt_error_from_unix(errno);
 299         }
 300
 301         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 302         if (psa == NULL) {
 303                 DEBUG(2,("make_sec_acl failed\n"));
 304                 return NT_STATUS_NO_MEMORY;
 305         }
 306
 307         DEBUG(10,("after make sec_acl\n"));
 308         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 309                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 310                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 311                                 NULL, psa, &sd_size);
 312         if (*ppdesc==NULL) {
 313                 DEBUG(2,("make_sec_desc failed\n"));
 314                 return NT_STATUS_NO_MEMORY;
 315         }
 316
 317         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 318                    ndr_size_security_descriptor(*ppdesc, 0)));
 319
 320         return NT_STATUS_OK;
 321 }
 322
 323 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 324                                uint32 security_info,
 325                                SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 326 {
 327         SMB_STRUCT_STAT sbuf;
 328
 329         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 330
 331         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 332                 return map_nt_error_from_unix(errno);
 333         }
 334
 335         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 336 }
 337
 338 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 339                               const char *name,
 340                               uint32 security_info,
 341                               SEC_DESC **ppdesc, SMB4ACL_T *theacl)
 342 {
 343         SMB_STRUCT_STAT sbuf;
 344
 345         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 346
 347         if (smbacl4_GetFileOwner(conn, name, &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 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 355 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 356
 357 typedef struct _smbacl4_vfs_params {
 358         enum smbacl4_mode_enum mode;
 359         bool do_chown;
 360         enum smbacl4_acedup_enum acedup;
 361         struct db_context *sid_mapping_table;
 362 } smbacl4_vfs_params;
 363
 364 /*
 365  * Gather special parameters for NFS4 ACL handling
 366  */
 367 static int smbacl4_get_vfs_params(
 368         const char *type_name,
 369         files_struct *fsp,
 370         smbacl4_vfs_params *params
 371 )
 372 {
 373         static const struct enum_list enum_smbacl4_modes[] = {
 374                 { e_simple, "simple" },
 375                 { e_special, "special" }
 376         };
 377         static const struct enum_list enum_smbacl4_acedups[] = {
 378                 { e_dontcare, "dontcare" },
 379                 { e_reject, "reject" },
 380                 { e_ignore, "ignore" },
 381                 { e_merge, "merge" },
 382         };
 383
 384         memset(params, 0, sizeof(smbacl4_vfs_params));
 385         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 386                 SNUM(fsp->conn), type_name,
 387                 "mode", enum_smbacl4_modes, e_simple);
 388         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 389                 "chown", True);
 390         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 391                 SNUM(fsp->conn), type_name,
 392                 "acedup", enum_smbacl4_acedups, e_dontcare);
 393
 394         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 395                 enum_smbacl4_modes[params->mode].name,
 396                 params->do_chown ? "true" : "false",
 397                 enum_smbacl4_acedups[params->acedup].name));
 398
 399         return 0;
 400 }
 401
 402 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 403 {
 404         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 405         SMB_ACE4_INT_T *aceint;
 406
 407         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 408
 409         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 410                 SMB_ACE4PROP_T *ace = &aceint->prop;
 411
 412                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 413                         ace->aceType,
 414                         ace->aceFlags, ace->flags,
 415                         ace->aceMask,
 416                         ace->who.id));
 417         }
 418 }
 419
 420 /*
 421  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 422  * match nonzero if "special" and who is equal
 423  * return ace if found matching; otherwise NULL
 424  */
 425 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 426         SMB4ACL_T *theacl,
 427         SMB_ACE4PROP_T *aceNew)
 428 {
 429         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 430         SMB_ACE4_INT_T *aceint;
 431
 432         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 433                 SMB_ACE4PROP_T *ace = &aceint->prop;
 434
 435                 if (ace->flags == aceNew->flags &&
 436                         ace->aceType==aceNew->aceType &&
 437                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 438                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 439                 ) {
 440                         /* keep type safety; e.g. gid is an u.short */
 441                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 442                         {
 443                                 if (ace->who.special_id==aceNew->who.special_id)
 444                                         return ace;
 445                         } else {
 446                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 447                                 {
 448                                         if (ace->who.gid==aceNew->who.gid)
 449                                                 return ace;
 450                                 } else {
 451                                         if (ace->who.uid==aceNew->who.uid)
 452                                                 return ace;
 453                                 }
 454                         }
 455                 }
 456         }
 457
 458         return NULL;
 459 }
 460
 461 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 462                          DOM_SID *dst)
 463 {
 464         static struct db_context *mapping_db = NULL;
 465         TDB_DATA data;
 466
 467         if (mapping_db == NULL) {
 468                 const char *dbname = lp_parm_const_string(
 469                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 470
 471                 if (dbname == NULL) {
 472                         DEBUG(10, ("%s:sidmap not defined\n",
 473                                    SMBACL4_PARAM_TYPE_NAME));
 474                         return False;
 475                 }
 476
 477                 become_root();
 478                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 479                                      O_RDONLY, 0600);
 480                 unbecome_root();
 481
 482                 if (mapping_db == NULL) {
 483                         DEBUG(1, ("could not open sidmap: %s\n",
 484                                   strerror(errno)));
 485                         return False;
 486                 }
 487         }
 488
 489         if (mapping_db->fetch(mapping_db, NULL,
 490                               string_term_tdb_data(sid_string_tos(src)),
 491                               &data) == -1) {
 492                 DEBUG(10, ("could not find mapping for SID %s\n",
 493                            sid_string_dbg(src)));
 494                 return False;
 495         }
 496
 497         if ((data.dptr == NULL) || (data.dsize <= 0)
 498             || (data.dptr[data.dsize-1] != '\0')) {
 499                 DEBUG(5, ("invalid mapping for SID %s\n",
 500                           sid_string_dbg(src)));
 501                 TALLOC_FREE(data.dptr);
 502                 return False;
 503         }
 504
 505         if (!string_to_sid(dst, (char *)data.dptr)) {
 506                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 507                           (char *)data.dptr, sid_string_dbg(src)));
 508                 TALLOC_FREE(data.dptr);
 509                 return False;
 510         }
 511
 512         TALLOC_FREE(data.dptr);
 513
 514         return True;
 515 }
 516
 517 static bool smbacl4_fill_ace4(
 518         TALLOC_CTX *mem_ctx,
 519         const char *filename,
 520         smbacl4_vfs_params *params,
 521         uid_t ownerUID,
 522         gid_t ownerGID,
 523         const SEC_ACE *ace_nt, /* input */
 524         SMB_ACE4PROP_T *ace_v4 /* output */
 525 )
 526 {
 527         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 528
 529         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 530         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 531         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 532         ace_v4->aceMask = ace_nt->access_mask &
 533                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 534
 535         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 536
 537         if (ace_v4->aceFlags!=ace_nt->flags)
 538                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 539                         ace_v4->aceFlags, ace_nt->flags));
 540
 541         if (ace_v4->aceMask!=ace_nt->access_mask)
 542                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 543                         ace_v4->aceMask, ace_nt->access_mask));
 544
 545         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 546                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 547                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 548         } else {
 549                 const char *dom, *name;
 550                 enum lsa_SidType type;
 551                 uid_t uid;
 552                 gid_t gid;
 553                 DOM_SID sid;
 554
 555                 sid_copy(&sid, &ace_nt->trustee);
 556
 557                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 558
 559                         DOM_SID mapped;
 560
 561                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 562                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 563                                           "unknown\n", filename, sid_string_dbg(&sid)));
 564                                 errno = EINVAL;
 565                                 return False;
 566                         }
 567
 568                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 569                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 570
 571                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 572                                         &name, &type)) {
 573                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 574                                           "mapped from %s is unknown\n",
 575                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 576                                 errno = EINVAL;
 577                                 return False;
 578                         }
 579
 580                         sid_copy(&sid, &mapped);
 581                 }
 582
 583                 if (type == SID_NAME_USER) {
 584                         if (!sid_to_uid(&sid, &uid)) {
 585                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 586                                           "convert %s to uid\n", filename,
 587                                           sid_string_dbg(&sid)));
 588                                 return False;
 589                         }
 590
 591                         if (params->mode==e_special && uid==ownerUID) {
 592                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 593                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 594                         } else {
 595                                 ace_v4->who.uid = uid;
 596                         }
 597                 } else { /* else group? - TODO check it... */
 598                         if (!sid_to_gid(&sid, &gid)) {
 599                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 600                                           "convert %s to gid\n", filename,
 601                                           sid_string_dbg(&sid)));
 602                                 return False;
 603                         }
 604
 605                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 606
 607                         if (params->mode==e_special && gid==ownerGID) {
 608                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 609                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 610                         } else {
 611                                 ace_v4->who.gid = gid;
 612                         }
 613                 }
 614         }
 615
 616         return True; /* OK */
 617 }
 618
 619 static int smbacl4_MergeIgnoreReject(
 620         enum smbacl4_acedup_enum acedup,
 621         SMB4ACL_T *theacl, /* may modify it */
 622         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 623         bool    *paddNewACE,
 624         int     i
 625 )
 626 {
 627         int     result = 0;
 628         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 629         if (ace4found)
 630         {
 631                 switch(acedup)
 632                 {
 633                 case e_merge: /* "merge" flags */
 634                         *paddNewACE = False;
 635                         ace4found->aceFlags |= ace->aceFlags;
 636                         ace4found->aceMask |= ace->aceMask;
 637                         break;
 638                 case e_ignore: /* leave out this record */
 639                         *paddNewACE = False;
 640                         break;
 641                 case e_reject: /* do an error */
 642                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 643                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 644                         result = -1;
 645                         break;
 646                 default:
 647                         break;
 648                 }
 649         }
 650         return result;
 651 }
 652
 653 static SMB4ACL_T *smbacl4_win2nfs4(
 654         const char *filename,
 655         const SEC_ACL *dacl,
 656         smbacl4_vfs_params *pparams,
 657         uid_t ownerUID,
 658         gid_t ownerGID
 659 )
 660 {
 661         SMB4ACL_T *theacl;
 662         uint32  i;
 663         TALLOC_CTX *mem_ctx = talloc_tos();
 664
 665         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 666
 667         theacl = smb_create_smb4acl();
 668         if (theacl==NULL)
 669                 return NULL;
 670
 671         for(i=0; i<dacl->num_aces; i++) {
 672                 SMB_ACE4PROP_T  ace_v4;
 673                 bool    addNewACE = True;
 674
 675                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 676                                        ownerUID, ownerGID,
 677                                        dacl->aces + i, &ace_v4)) {
 678                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 679                                   filename,
 680                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 681                         continue;
 682                 }
 683
 684                 if (pparams->acedup!=e_dontcare) {
 685                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 686                                 &ace_v4, &addNewACE, i))
 687                                 return NULL;
 688                 }
 689
 690                 if (addNewACE)
 691                         smb_add_ace4(theacl, &ace_v4);
 692         }
 693
 694         return theacl;
 695 }
 696
 697 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 698         uint32 security_info_sent,
 699         const SEC_DESC *psd,
 700         set_nfs4acl_native_fn_t set_nfs4_native)
 701 {
 702         smbacl4_vfs_params params;
 703         SMB4ACL_T *theacl = NULL;
 704         bool    result;
 705
 706         SMB_STRUCT_STAT sbuf;
 707         bool set_acl_as_root = false;
 708         uid_t newUID = (uid_t)-1;
 709         gid_t newGID = (gid_t)-1;
 710         int saved_errno;
 711
 712         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 713
 714         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 715                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 716         {
 717                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 718                         security_info_sent));
 719                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 720         }
 721
 722         /* Special behaviours */
 723         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 724                 return NT_STATUS_NO_MEMORY;
 725
 726         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 727                 return map_nt_error_from_unix(errno);
 728
 729         if (params.do_chown) {
 730                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 731                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 732                 if (!NT_STATUS_IS_OK(status)) {
 733                         DEBUG(8, ("unpack_nt_owners failed"));
 734                         return status;
 735                 }
 736                 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
 737                     ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
 738                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 739                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 740                                          fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
 741                                          strerror(errno)));
 742                                 return map_nt_error_from_unix(errno);
 743                         }
 744
 745                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 746                                   fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 747                         if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
 748                                 return map_nt_error_from_unix(errno);
 749
 750                         /* If we successfully chowned, we know we must
 751                          * be able to set the acl, so do it as root.
 752                          */
 753                         set_acl_as_root = true;
 754                 }
 755         }
 756
 757         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 758                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 759                 return NT_STATUS_OK;
 760         }
 761
 762         theacl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
 763         if (!theacl)
 764                 return map_nt_error_from_unix(errno);
 765
 766         smbacl4_dump_nfs4acl(10, theacl);
 767
 768         if (set_acl_as_root) {
 769                 become_root();
 770         }
 771         result = set_nfs4_native(fsp, theacl);
 772         saved_errno = errno;
 773         if (set_acl_as_root) {
 774                 unbecome_root();
 775         }
 776         if (result!=True) {
 777                 errno = saved_errno;
 778                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 779                 return map_nt_error_from_unix(errno);
 780         }
 781
 782         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 783         return NT_STATUS_OK;
 784 }