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