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 #include "librpc/gen_ndr/ndr_security.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_ACLS
  26
  27 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  28
  29 extern const struct generic_mapping file_generic_mapping;
  30
  31 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  32 typedef struct _SMB_ACE4_INT_T
  33 {
  34         uint32  magic;
  35         SMB_ACE4PROP_T  prop;
  36         void    *next;
  37 } SMB_ACE4_INT_T;
  38
  39 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  40 typedef struct _SMB_ACL4_INT_T
  41 {
  42         uint32  magic;
  43         uint32  naces;
  44         SMB_ACE4_INT_T  *first;
  45         SMB_ACE4_INT_T  *last;
  46 } SMB_ACL4_INT_T;
  47
  48 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  49 {
  50         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  51         if (theacl==NULL)
  52         {
  53                 DEBUG(2, ("acl is NULL\n"));
  54                 errno = EINVAL;
  55                 return NULL;
  56         }
  57         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  58         {
  59                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  60                 errno = EINVAL;
  61                 return NULL;
  62         }
  63         return aclint;
  64 }
  65
  66 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  67 {
  68         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  69         if (ace==NULL)
  70         {
  71                 DEBUG(2, ("ace is NULL\n"));
  72                 errno = EINVAL;
  73                 return NULL;
  74         }
  75         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  76         {
  77                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  78                 errno = EINVAL;
  79                 return NULL;
  80         }
  81         return aceint;
  82 }
  83
  84 SMB4ACL_T *smb_create_smb4acl(void)
  85 {
  86         TALLOC_CTX *mem_ctx = talloc_tos();
  87         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  88         if (theacl==NULL)
  89         {
  90                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  91                 errno = ENOMEM;
  92                 return NULL;
  93         }
  94         theacl->magic = SMB_ACL4_INT_MAGIC;
  95         /* theacl->first, last = NULL not needed */
  96         return (SMB4ACL_T *)theacl;
  97 }
  98
  99 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
 100 {
 101         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 102         TALLOC_CTX *mem_ctx = talloc_tos();
 103         SMB_ACE4_INT_T *ace;
 104
 105         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 106         if (ace==NULL)
 107         {
 108                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 109                 errno = ENOMEM;
 110                 return NULL;
 111         }
 112         ace->magic = SMB_ACE4_INT_MAGIC;
 113         /* ace->next = NULL not needed */
 114         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 115
 116         if (aclint->first==NULL)
 117         {
 118                 aclint->first = ace;
 119                 aclint->last = ace;
 120         } else {
 121                 aclint->last->next = (void *)ace;
 122                 aclint->last = ace;
 123         }
 124         aclint->naces++;
 125
 126         return (SMB4ACE_T *)ace;
 127 }
 128
 129 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 130 {
 131         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 132         if (aceint==NULL)
 133                 return NULL;
 134
 135         return &aceint->prop;
 136 }
 137
 138 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 139 {
 140         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 141         if (aceint==NULL)
 142                 return NULL;
 143
 144         return (SMB4ACE_T *)aceint->next;
 145 }
 146
 147 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 148 {
 149         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 150         if (aclint==NULL)
 151                 return NULL;
 152
 153         return (SMB4ACE_T *)aclint->first;
 154 }
 155
 156 uint32 smb_get_naces(SMB4ACL_T *theacl)
 157 {
 158         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 159         if (aclint==NULL)
 160                 return 0;
 161
 162         return aclint->naces;
 163 }
 164
 165 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 166                                 const char *filename,
 167                                 SMB_STRUCT_STAT *psbuf)
 168 {
 169         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 170
 171         /* Get the stat struct for the owner info. */
 172         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 173         {
 174                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 175                         strerror(errno)));
 176                 return -1;
 177         }
 178
 179         return 0;
 180 }
 181
 182 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 183 {
 184         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 185
 186         if (fsp->is_directory || fsp->fh->fd == -1) {
 187                 return smbacl4_GetFileOwner(fsp->conn,
 188                                             fsp->fsp_name->base_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 *theacl, /* in */
 201         struct dom_sid *psid_owner, /* in */
 202         struct dom_sid *psid_group, /* in */
 203         bool is_directory, /* in */
 204         struct security_ace **ppnt_ace_list, /* out */
 205         int *pgood_aces /* out */
 206 )
 207 {
 208         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 209         SMB_ACE4_INT_T *aceint;
 210         struct security_ace *nt_ace_list = NULL;
 211         int good_aces = 0;
 212
 213         DEBUG(10, ("smbacl_nfs42win entered\n"));
 214
 215         aclint = get_validated_aclint(theacl);
 216         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 217         /* in smb_get_nt_acl_nfs4(). */
 218         nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
 219         if (nt_ace_list==NULL)
 220         {
 221                 DEBUG(10, ("talloc error"));
 222                 errno = ENOMEM;
 223                 return False;
 224         }
 225
 226         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 227                 uint32_t mask;
 228                 struct dom_sid sid;
 229                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 230                 uint32_t mapped_ace_flags;
 231
 232                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 233                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 234                         ace->aceFlags, ace->aceMask, ace->who.id));
 235
 236                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 237
 238                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 239                         switch (ace->who.special_id) {
 240                         case SMB_ACE4_WHO_OWNER:
 241                                 sid_copy(&sid, psid_owner);
 242                                 break;
 243                         case SMB_ACE4_WHO_GROUP:
 244                                 sid_copy(&sid, psid_group);
 245                                 break;
 246                         case SMB_ACE4_WHO_EVERYONE:
 247                                 sid_copy(&sid, &global_sid_World);
 248                                 break;
 249                         default:
 250                                 DEBUG(8, ("invalid special who id %d "
 251                                         "ignored\n", ace->who.special_id));
 252                         }
 253                 } else {
 254                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 255                                 gid_to_sid(&sid, ace->who.gid);
 256                         } else {
 257                                 uid_to_sid(&sid, ace->who.uid);
 258                         }
 259                 }
 260                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 261                            sid_string_dbg(&sid)));
 262
 263                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 264                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 265                 }
 266
 267                 mapped_ace_flags = ace->aceFlags & 0xf;
 268                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 269                         /*
 270                          * GPFS sets inherits dir_inhert and file_inherit flags
 271                          * to files, too, which confuses windows, and seems to
 272                          * be wrong anyways. ==> Map these bits away for files.
 273                          */
 274                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 275                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 276                 }
 277                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 278                       ace->aceFlags, mapped_ace_flags));
 279
 280                 mask = ace->aceMask;
 281                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 282                         ace->aceType, mask,
 283                         mapped_ace_flags);
 284         }
 285
 286         *ppnt_ace_list = nt_ace_list;
 287         *pgood_aces = good_aces;
 288
 289         return True;
 290 }
 291
 292 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 293         uint32 security_info,
 294         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 295 {
 296         int     good_aces = 0;
 297         struct dom_sid sid_owner, sid_group;
 298         size_t sd_size = 0;
 299         struct security_ace *nt_ace_list = NULL;
 300         struct security_acl *psa = NULL;
 301         TALLOC_CTX *mem_ctx = talloc_tos();
 302
 303         if (theacl==NULL || smb_get_naces(theacl)==0)
 304                 return NT_STATUS_ACCESS_DENIED; /* special because we
 305                                                  * shouldn't alloc 0 for
 306                                                  * win */
 307
 308         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 309         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 310
 311         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 312                              S_ISDIR(sbuf->st_ex_mode),
 313                                 &nt_ace_list, &good_aces)==False) {
 314                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 315                 return map_nt_error_from_unix(errno);
 316         }
 317
 318         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 319         if (psa == NULL) {
 320                 DEBUG(2,("make_sec_acl failed\n"));
 321                 return NT_STATUS_NO_MEMORY;
 322         }
 323
 324         DEBUG(10,("after make sec_acl\n"));
 325         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 326                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 327                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 328                                 NULL, psa, &sd_size);
 329         if (*ppdesc==NULL) {
 330                 DEBUG(2,("make_sec_desc failed\n"));
 331                 return NT_STATUS_NO_MEMORY;
 332         }
 333
 334         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 335                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 336
 337         return NT_STATUS_OK;
 338 }
 339
 340 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 341                                uint32 security_info,
 342                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 343 {
 344         SMB_STRUCT_STAT sbuf;
 345
 346         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 347
 348         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 349                 return map_nt_error_from_unix(errno);
 350         }
 351
 352         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 353 }
 354
 355 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 356                               const char *name,
 357                               uint32 security_info,
 358                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 359 {
 360         SMB_STRUCT_STAT sbuf;
 361
 362         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 363
 364         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 365                 return map_nt_error_from_unix(errno);
 366         }
 367
 368         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 369 }
 370
 371 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 372 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 373
 374 typedef struct _smbacl4_vfs_params {
 375         enum smbacl4_mode_enum mode;
 376         bool do_chown;
 377         enum smbacl4_acedup_enum acedup;
 378         struct db_context *sid_mapping_table;
 379 } smbacl4_vfs_params;
 380
 381 /*
 382  * Gather special parameters for NFS4 ACL handling
 383  */
 384 static int smbacl4_get_vfs_params(
 385         const char *type_name,
 386         files_struct *fsp,
 387         smbacl4_vfs_params *params
 388 )
 389 {
 390         static const struct enum_list enum_smbacl4_modes[] = {
 391                 { e_simple, "simple" },
 392                 { e_special, "special" }
 393         };
 394         static const struct enum_list enum_smbacl4_acedups[] = {
 395                 { e_dontcare, "dontcare" },
 396                 { e_reject, "reject" },
 397                 { e_ignore, "ignore" },
 398                 { e_merge, "merge" },
 399         };
 400
 401         memset(params, 0, sizeof(smbacl4_vfs_params));
 402         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 403                 SNUM(fsp->conn), type_name,
 404                 "mode", enum_smbacl4_modes, e_simple);
 405         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 406                 "chown", True);
 407         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 408                 SNUM(fsp->conn), type_name,
 409                 "acedup", enum_smbacl4_acedups, e_dontcare);
 410
 411         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 412                 enum_smbacl4_modes[params->mode].name,
 413                 params->do_chown ? "true" : "false",
 414                 enum_smbacl4_acedups[params->acedup].name));
 415
 416         return 0;
 417 }
 418
 419 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 420 {
 421         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 422         SMB_ACE4_INT_T *aceint;
 423
 424         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 425
 426         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 427                 SMB_ACE4PROP_T *ace = &aceint->prop;
 428
 429                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 430                         ace->aceType,
 431                         ace->aceFlags, ace->flags,
 432                         ace->aceMask,
 433                         ace->who.id));
 434         }
 435 }
 436
 437 /*
 438  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 439  * match nonzero if "special" and who is equal
 440  * return ace if found matching; otherwise NULL
 441  */
 442 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 443         SMB4ACL_T *theacl,
 444         SMB_ACE4PROP_T *aceNew)
 445 {
 446         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 447         SMB_ACE4_INT_T *aceint;
 448
 449         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 450                 SMB_ACE4PROP_T *ace = &aceint->prop;
 451
 452                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 453                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 454                           ace->aceType, ace->flags, ace->aceFlags,
 455                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 456
 457                 if (ace->flags == aceNew->flags &&
 458                         ace->aceType==aceNew->aceType &&
 459                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 460                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 461                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 462                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 463                 ) {
 464                         /* keep type safety; e.g. gid is an u.short */
 465                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 466                         {
 467                                 if (ace->who.special_id==aceNew->who.special_id)
 468                                         return ace;
 469                         } else {
 470                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 471                                 {
 472                                         if (ace->who.gid==aceNew->who.gid)
 473                                                 return ace;
 474                                 } else {
 475                                         if (ace->who.uid==aceNew->who.uid)
 476                                                 return ace;
 477                                 }
 478                         }
 479                 }
 480         }
 481
 482         return NULL;
 483 }
 484
 485 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 486                          struct dom_sid *dst)
 487 {
 488         static struct db_context *mapping_db = NULL;
 489         TDB_DATA data;
 490
 491         if (mapping_db == NULL) {
 492                 const char *dbname = lp_parm_const_string(
 493                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 494
 495                 if (dbname == NULL) {
 496                         DEBUG(10, ("%s:sidmap not defined\n",
 497                                    SMBACL4_PARAM_TYPE_NAME));
 498                         return False;
 499                 }
 500
 501                 become_root();
 502                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 503                                      O_RDONLY, 0600);
 504                 unbecome_root();
 505
 506                 if (mapping_db == NULL) {
 507                         DEBUG(1, ("could not open sidmap: %s\n",
 508                                   strerror(errno)));
 509                         return False;
 510                 }
 511         }
 512
 513         if (mapping_db->fetch(mapping_db, NULL,
 514                               string_term_tdb_data(sid_string_tos(src)),
 515                               &data) == -1) {
 516                 DEBUG(10, ("could not find mapping for SID %s\n",
 517                            sid_string_dbg(src)));
 518                 return False;
 519         }
 520
 521         if ((data.dptr == NULL) || (data.dsize <= 0)
 522             || (data.dptr[data.dsize-1] != '\0')) {
 523                 DEBUG(5, ("invalid mapping for SID %s\n",
 524                           sid_string_dbg(src)));
 525                 TALLOC_FREE(data.dptr);
 526                 return False;
 527         }
 528
 529         if (!string_to_sid(dst, (char *)data.dptr)) {
 530                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 531                           (char *)data.dptr, sid_string_dbg(src)));
 532                 TALLOC_FREE(data.dptr);
 533                 return False;
 534         }
 535
 536         TALLOC_FREE(data.dptr);
 537
 538         return True;
 539 }
 540
 541 static bool smbacl4_fill_ace4(
 542         TALLOC_CTX *mem_ctx,
 543         const char *filename,
 544         smbacl4_vfs_params *params,
 545         uid_t ownerUID,
 546         gid_t ownerGID,
 547         const struct security_ace *ace_nt, /* input */
 548         SMB_ACE4PROP_T *ace_v4 /* output */
 549 )
 550 {
 551         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 552
 553         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 554         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 555         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 556         ace_v4->aceMask = ace_nt->access_mask &
 557                 (SEC_STD_ALL | SEC_FILE_ALL);
 558
 559         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 560
 561         if (ace_v4->aceFlags!=ace_nt->flags)
 562                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 563                         ace_v4->aceFlags, ace_nt->flags));
 564
 565         if (ace_v4->aceMask!=ace_nt->access_mask)
 566                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 567                         ace_v4->aceMask, ace_nt->access_mask));
 568
 569         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 570                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 571                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 572         } else {
 573                 const char *dom, *name;
 574                 enum lsa_SidType type;
 575                 uid_t uid;
 576                 gid_t gid;
 577                 struct dom_sid sid;
 578
 579                 sid_copy(&sid, &ace_nt->trustee);
 580
 581                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 582
 583                         struct dom_sid mapped;
 584
 585                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 586                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 587                                           "unknown\n", filename, sid_string_dbg(&sid)));
 588                                 errno = EINVAL;
 589                                 return False;
 590                         }
 591
 592                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 593                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 594
 595                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 596                                         &name, &type)) {
 597                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 598                                           "mapped from %s is unknown\n",
 599                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 600                                 errno = EINVAL;
 601                                 return False;
 602                         }
 603
 604                         sid_copy(&sid, &mapped);
 605                 }
 606
 607                 if (type == SID_NAME_USER) {
 608                         if (!sid_to_uid(&sid, &uid)) {
 609                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 610                                           "convert %s to uid\n", filename,
 611                                           sid_string_dbg(&sid)));
 612                                 return False;
 613                         }
 614
 615                         if (params->mode==e_special && uid==ownerUID) {
 616                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 617                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 618                         } else {
 619                                 ace_v4->who.uid = uid;
 620                         }
 621                 } else { /* else group? - TODO check it... */
 622                         if (!sid_to_gid(&sid, &gid)) {
 623                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 624                                           "convert %s to gid\n", filename,
 625                                           sid_string_dbg(&sid)));
 626                                 return False;
 627                         }
 628
 629                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 630
 631                         if (params->mode==e_special && gid==ownerGID) {
 632                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 633                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 634                         } else {
 635                                 ace_v4->who.gid = gid;
 636                         }
 637                 }
 638         }
 639
 640         return True; /* OK */
 641 }
 642
 643 static int smbacl4_MergeIgnoreReject(
 644         enum smbacl4_acedup_enum acedup,
 645         SMB4ACL_T *theacl, /* may modify it */
 646         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 647         bool    *paddNewACE,
 648         int     i
 649 )
 650 {
 651         int     result = 0;
 652         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 653         if (ace4found)
 654         {
 655                 switch(acedup)
 656                 {
 657                 case e_merge: /* "merge" flags */
 658                         *paddNewACE = False;
 659                         ace4found->aceFlags |= ace->aceFlags;
 660                         ace4found->aceMask |= ace->aceMask;
 661                         break;
 662                 case e_ignore: /* leave out this record */
 663                         *paddNewACE = False;
 664                         break;
 665                 case e_reject: /* do an error */
 666                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 667                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 668                         result = -1;
 669                         break;
 670                 default:
 671                         break;
 672                 }
 673         }
 674         return result;
 675 }
 676
 677 static SMB4ACL_T *smbacl4_win2nfs4(
 678         const char *filename,
 679         const struct security_acl *dacl,
 680         smbacl4_vfs_params *pparams,
 681         uid_t ownerUID,
 682         gid_t ownerGID
 683 )
 684 {
 685         SMB4ACL_T *theacl;
 686         uint32  i;
 687         TALLOC_CTX *mem_ctx = talloc_tos();
 688
 689         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 690
 691         theacl = smb_create_smb4acl();
 692         if (theacl==NULL)
 693                 return NULL;
 694
 695         for(i=0; i<dacl->num_aces; i++) {
 696                 SMB_ACE4PROP_T  ace_v4;
 697                 bool    addNewACE = True;
 698
 699                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 700                                        ownerUID, ownerGID,
 701                                        dacl->aces + i, &ace_v4)) {
 702                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 703                                   filename,
 704                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 705                         continue;
 706                 }
 707
 708                 if (pparams->acedup!=e_dontcare) {
 709                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 710                                 &ace_v4, &addNewACE, i))
 711                                 return NULL;
 712                 }
 713
 714                 if (addNewACE)
 715                         smb_add_ace4(theacl, &ace_v4);
 716         }
 717
 718         return theacl;
 719 }
 720
 721 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 722         uint32 security_info_sent,
 723         const struct security_descriptor *psd,
 724         set_nfs4acl_native_fn_t set_nfs4_native)
 725 {
 726         smbacl4_vfs_params params;
 727         SMB4ACL_T *theacl = NULL;
 728         bool    result;
 729
 730         SMB_STRUCT_STAT sbuf;
 731         bool set_acl_as_root = false;
 732         uid_t newUID = (uid_t)-1;
 733         gid_t newGID = (gid_t)-1;
 734         int saved_errno;
 735
 736         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 737
 738         if ((security_info_sent & (SECINFO_DACL |
 739                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 740         {
 741                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 742                         security_info_sent));
 743                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 744         }
 745
 746         /* Special behaviours */
 747         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 748                 return NT_STATUS_NO_MEMORY;
 749
 750         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 751                 return map_nt_error_from_unix(errno);
 752
 753         if (params.do_chown) {
 754                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 755                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 756                 if (!NT_STATUS_IS_OK(status)) {
 757                         DEBUG(8, ("unpack_nt_owners failed"));
 758                         return status;
 759                 }
 760                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 761                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 762
 763                         if(try_chown(fsp->conn, fsp->fsp_name, newUID,
 764                                      newGID)) {
 765                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 766                                          "%s.\n", fsp_str_dbg(fsp),
 767                                          (unsigned int)newUID,
 768                                          (unsigned int)newGID,
 769                                          strerror(errno)));
 770                                 return map_nt_error_from_unix(errno);
 771                         }
 772
 773                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 774                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 775                                   (unsigned int)newGID));
 776                         if (smbacl4_GetFileOwner(fsp->conn,
 777                                                  fsp->fsp_name->base_name,
 778                                                  &sbuf))
 779                                 return map_nt_error_from_unix(errno);
 780
 781                         /* If we successfully chowned, we know we must
 782                          * be able to set the acl, so do it as root.
 783                          */
 784                         set_acl_as_root = true;
 785                 }
 786         }
 787
 788         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 789                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 790                 return NT_STATUS_OK;
 791         }
 792
 793         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 794                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 795         if (!theacl)
 796                 return map_nt_error_from_unix(errno);
 797
 798         smbacl4_dump_nfs4acl(10, theacl);
 799
 800         if (set_acl_as_root) {
 801                 become_root();
 802         }
 803         result = set_nfs4_native(fsp, theacl);
 804         saved_errno = errno;
 805         if (set_acl_as_root) {
 806                 unbecome_root();
 807         }
 808         if (result!=True) {
 809                 errno = saved_errno;
 810                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 811                 return map_nt_error_from_unix(errno);
 812         }
 813
 814         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 815         return NT_STATUS_OK;
 816 }