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 *acl)
  48 {
  49         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
  50         if (acl==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  *acl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  87         if (acl==NULL)
  88         {
  89                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  90                 errno = ENOMEM;
  91                 return NULL;
  92         }
  93         acl->magic = SMB_ACL4_INT_MAGIC;
  94         /* acl->first, last = NULL not needed */
  95         return (SMB4ACL_T *)acl;
  96 }
  97
  98 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
  99 {
 100         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 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 *acl)
 147 {
 148         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 149         if (aclint==NULL)
 150                 return NULL;
 151
 152         return (SMB4ACE_T *)aclint->first;
 153 }
 154
 155 uint32 smb_get_naces(SMB4ACL_T *acl)
 156 {
 157         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 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 *acl, /* in */
 199         DOM_SID *psid_owner, /* in */
 200         DOM_SID *psid_group, /* in */
 201         SEC_ACE **ppnt_ace_list, /* out */
 202         int *pgood_aces /* out */
 203 )
 204 {
 205         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
 206         SMB_ACE4_INT_T *aceint;
 207         SEC_ACE *nt_ace_list = NULL;
 208         int good_aces = 0;
 209
 210         DEBUG(10, ("smbacl_nfs42win entered"));
 211
 212         aclint = get_validated_aclint(acl);
 213         /* We do not check for naces being 0 or acl being NULL here because it is done upstream */
 214         /* in smb_get_nt_acl_nfs4(). */
 215         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
 216         if (nt_ace_list==NULL)
 217         {
 218                 DEBUG(10, ("talloc error"));
 219                 errno = ENOMEM;
 220                 return False;
 221         }
 222
 223         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 224                 uint32_t mask;
 225                 DOM_SID sid;
 226                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 227
 228                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 229                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 230                         ace->aceFlags, ace->aceMask, ace->who.id));
 231
 232                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 233
 234                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 235                         switch (ace->who.special_id) {
 236                         case SMB_ACE4_WHO_OWNER:
 237                                 sid_copy(&sid, psid_owner);
 238                                 break;
 239                         case SMB_ACE4_WHO_GROUP:
 240                                 sid_copy(&sid, psid_group);
 241                                 break;
 242                         case SMB_ACE4_WHO_EVERYONE:
 243                                 sid_copy(&sid, &global_sid_World);
 244                                 break;
 245                         default:
 246                                 DEBUG(8, ("invalid special who id %d "
 247                                         "ignored\n", ace->who.special_id));
 248                         }
 249                 } else {
 250                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 251                                 gid_to_sid(&sid, ace->who.gid);
 252                         } else {
 253                                 uid_to_sid(&sid, ace->who.uid);
 254                         }
 255                 }
 256                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 257                            sid_string_dbg(&sid)));
 258
 259                 mask = ace->aceMask;
 260                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 261                         ace->aceType, mask,
 262                         ace->aceFlags & 0xf);
 263         }
 264
 265         *ppnt_ace_list = nt_ace_list;
 266         *pgood_aces = good_aces;
 267
 268         return True;
 269 }
 270
 271 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 272         uint32 security_info,
 273         SEC_DESC **ppdesc, SMB4ACL_T *acl)
 274 {
 275         int     good_aces = 0;
 276         DOM_SID sid_owner, sid_group;
 277         size_t sd_size = 0;
 278         SEC_ACE *nt_ace_list = NULL;
 279         SEC_ACL *psa = NULL;
 280         TALLOC_CTX *mem_ctx = talloc_tos();
 281
 282         if (acl==NULL || smb_get_naces(acl)==0)
 283                 return NT_STATUS_ACCESS_DENIED; /* special because we
 284                                                  * shouldn't alloc 0 for
 285                                                  * win */
 286
 287         uid_to_sid(&sid_owner, sbuf->st_uid);
 288         gid_to_sid(&sid_group, sbuf->st_gid);
 289
 290         if (smbacl4_nfs42win(mem_ctx, acl, &sid_owner, &sid_group, &nt_ace_list, &good_aces)==False) {
 291                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 292                 return map_nt_error_from_unix(errno);
 293         }
 294
 295         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 296         if (psa == NULL) {
 297                 DEBUG(2,("make_sec_acl failed\n"));
 298                 return NT_STATUS_NO_MEMORY;
 299         }
 300
 301         DEBUG(10,("after make sec_acl\n"));
 302         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 303                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 304                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 305                                 NULL, psa, &sd_size);
 306         if (*ppdesc==NULL) {
 307                 DEBUG(2,("make_sec_desc failed\n"));
 308                 return NT_STATUS_NO_MEMORY;
 309         }
 310
 311         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 312                    ndr_size_security_descriptor(*ppdesc, 0)));
 313
 314         return NT_STATUS_OK;
 315 }
 316
 317 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 318                                uint32 security_info,
 319                                SEC_DESC **ppdesc, SMB4ACL_T *acl)
 320 {
 321         SMB_STRUCT_STAT sbuf;
 322
 323         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 324
 325         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 326                 return map_nt_error_from_unix(errno);
 327         }
 328
 329         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
 330 }
 331
 332 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 333                               const char *name,
 334                               uint32 security_info,
 335                               SEC_DESC **ppdesc, SMB4ACL_T *acl)
 336 {
 337         SMB_STRUCT_STAT sbuf;
 338
 339         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 340
 341         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 342                 return map_nt_error_from_unix(errno);
 343         }
 344
 345         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
 346 }
 347
 348 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 349 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 350
 351 typedef struct _smbacl4_vfs_params {
 352         enum smbacl4_mode_enum mode;
 353         bool do_chown;
 354         enum smbacl4_acedup_enum acedup;
 355         struct db_context *sid_mapping_table;
 356 } smbacl4_vfs_params;
 357
 358 /*
 359  * Gather special parameters for NFS4 ACL handling
 360  */
 361 static int smbacl4_get_vfs_params(
 362         const char *type_name,
 363         files_struct *fsp,
 364         smbacl4_vfs_params *params
 365 )
 366 {
 367         static const struct enum_list enum_smbacl4_modes[] = {
 368                 { e_simple, "simple" },
 369                 { e_special, "special" }
 370         };
 371         static const struct enum_list enum_smbacl4_acedups[] = {
 372                 { e_dontcare, "dontcare" },
 373                 { e_reject, "reject" },
 374                 { e_ignore, "ignore" },
 375                 { e_merge, "merge" },
 376         };
 377
 378         memset(params, 0, sizeof(smbacl4_vfs_params));
 379         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 380                 SNUM(fsp->conn), type_name,
 381                 "mode", enum_smbacl4_modes, e_simple);
 382         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 383                 "chown", True);
 384         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 385                 SNUM(fsp->conn), type_name,
 386                 "acedup", enum_smbacl4_acedups, e_dontcare);
 387
 388         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 389                 enum_smbacl4_modes[params->mode].name,
 390                 params->do_chown ? "true" : "false",
 391                 enum_smbacl4_acedups[params->acedup].name));
 392
 393         return 0;
 394 }
 395
 396 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *acl)
 397 {
 398         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 399         SMB_ACE4_INT_T *aceint;
 400
 401         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 402
 403         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 404                 SMB_ACE4PROP_T *ace = &aceint->prop;
 405
 406                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 407                         ace->aceType,
 408                         ace->aceFlags, ace->flags,
 409                         ace->aceMask,
 410                         ace->who.id));
 411         }
 412 }
 413
 414 /*
 415  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 416  * match nonzero if "special" and who is equal
 417  * return ace if found matching; otherwise NULL
 418  */
 419 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 420         SMB4ACL_T *acl,
 421         SMB_ACE4PROP_T *aceNew)
 422 {
 423         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 424         SMB_ACE4_INT_T *aceint;
 425
 426         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 427                 SMB_ACE4PROP_T *ace = &aceint->prop;
 428
 429                 if (ace->flags == aceNew->flags &&
 430                         ace->aceType==aceNew->aceType &&
 431                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 432                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 433                 ) {
 434                         /* keep type safety; e.g. gid is an u.short */
 435                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 436                         {
 437                                 if (ace->who.special_id==aceNew->who.special_id)
 438                                         return ace;
 439                         } else {
 440                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 441                                 {
 442                                         if (ace->who.gid==aceNew->who.gid)
 443                                                 return ace;
 444                                 } else {
 445                                         if (ace->who.uid==aceNew->who.uid)
 446                                                 return ace;
 447                                 }
 448                         }
 449                 }
 450         }
 451
 452         return NULL;
 453 }
 454
 455 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 456                          DOM_SID *dst)
 457 {
 458         static struct db_context *mapping_db = NULL;
 459         TDB_DATA data;
 460
 461         if (mapping_db == NULL) {
 462                 const char *dbname = lp_parm_const_string(
 463                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 464
 465                 if (dbname == NULL) {
 466                         DEBUG(10, ("%s:sidmap not defined\n",
 467                                    SMBACL4_PARAM_TYPE_NAME));
 468                         return False;
 469                 }
 470
 471                 become_root();
 472                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 473                                      O_RDONLY, 0600);
 474                 unbecome_root();
 475
 476                 if (mapping_db == NULL) {
 477                         DEBUG(1, ("could not open sidmap: %s\n",
 478                                   strerror(errno)));
 479                         return False;
 480                 }
 481         }
 482
 483         if (mapping_db->fetch(mapping_db, NULL,
 484                               string_term_tdb_data(sid_string_tos(src)),
 485                               &data) == -1) {
 486                 DEBUG(10, ("could not find mapping for SID %s\n",
 487                            sid_string_dbg(src)));
 488                 return False;
 489         }
 490
 491         if ((data.dptr == NULL) || (data.dsize <= 0)
 492             || (data.dptr[data.dsize-1] != '\0')) {
 493                 DEBUG(5, ("invalid mapping for SID %s\n",
 494                           sid_string_dbg(src)));
 495                 TALLOC_FREE(data.dptr);
 496                 return False;
 497         }
 498
 499         if (!string_to_sid(dst, (char *)data.dptr)) {
 500                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 501                           (char *)data.dptr, sid_string_dbg(src)));
 502                 TALLOC_FREE(data.dptr);
 503                 return False;
 504         }
 505
 506         TALLOC_FREE(data.dptr);
 507
 508         return True;
 509 }
 510
 511 static bool smbacl4_fill_ace4(
 512         TALLOC_CTX *mem_ctx,
 513         const char *filename,
 514         smbacl4_vfs_params *params,
 515         uid_t ownerUID,
 516         gid_t ownerGID,
 517         const SEC_ACE *ace_nt, /* input */
 518         SMB_ACE4PROP_T *ace_v4 /* output */
 519 )
 520 {
 521         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 522
 523         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 524         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 525         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 526         ace_v4->aceMask = ace_nt->access_mask &
 527                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 528
 529         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 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         const 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         const 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 set_acl_as_root = false;
 702         uid_t newUID = (uid_t)-1;
 703         gid_t newGID = (gid_t)-1;
 704         int saved_errno;
 705
 706         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 707
 708         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 709                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 710         {
 711                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 712                         security_info_sent));
 713                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 714         }
 715
 716         /* Special behaviours */
 717         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 718                 return NT_STATUS_NO_MEMORY;
 719
 720         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 721                 return map_nt_error_from_unix(errno);
 722
 723         if (params.do_chown) {
 724                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 725                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 726                 if (!NT_STATUS_IS_OK(status)) {
 727                         DEBUG(8, ("unpack_nt_owners failed"));
 728                         return status;
 729                 }
 730                 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
 731                     ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
 732                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 733                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 734                                          fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
 735                                          strerror(errno)));
 736                                 return map_nt_error_from_unix(errno);
 737                         }
 738
 739                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 740                                   fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 741                         if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
 742                                 return map_nt_error_from_unix(errno);
 743
 744                         /* If we successfully chowned, we know we must
 745                          * be able to set the acl, so do it as root.
 746                          */
 747                         set_acl_as_root = true;
 748                 }
 749         }
 750
 751         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 752                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 753                 return NT_STATUS_OK;
 754         }
 755
 756         acl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
 757         if (!acl)
 758                 return map_nt_error_from_unix(errno);
 759
 760         smbacl4_dump_nfs4acl(10, acl);
 761
 762         if (set_acl_as_root) {
 763                 become_root();
 764         }
 765         result = set_nfs4_native(fsp, acl);
 766         saved_errno = errno;
 767         if (set_acl_as_root) {
 768                 unbecome_root();
 769         }
 770         if (result!=True) {
 771                 errno = saved_errno;
 772                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 773                 return map_nt_error_from_unix(errno);
 774         }
 775
 776         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 777         return NT_STATUS_OK;
 778 }