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 #include "../libcli/security/dom_sid.h"
  24 #include "../libcli/security/security.h"
  25 #include "include/dbwrap.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_ACLS
  29
  30 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  31
  32 extern const struct generic_mapping file_generic_mapping;
  33
  34 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  35 typedef struct _SMB_ACE4_INT_T
  36 {
  37         uint32  magic;
  38         SMB_ACE4PROP_T  prop;
  39         void    *next;
  40 } SMB_ACE4_INT_T;
  41
  42 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  43 typedef struct _SMB_ACL4_INT_T
  44 {
  45         uint32  magic;
  46         uint32  naces;
  47         SMB_ACE4_INT_T  *first;
  48         SMB_ACE4_INT_T  *last;
  49 } SMB_ACL4_INT_T;
  50
  51 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  52 {
  53         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  54         if (theacl==NULL)
  55         {
  56                 DEBUG(2, ("acl is NULL\n"));
  57                 errno = EINVAL;
  58                 return NULL;
  59         }
  60         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  61         {
  62                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  63                 errno = EINVAL;
  64                 return NULL;
  65         }
  66         return aclint;
  67 }
  68
  69 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  70 {
  71         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  72         if (ace==NULL)
  73         {
  74                 DEBUG(2, ("ace is NULL\n"));
  75                 errno = EINVAL;
  76                 return NULL;
  77         }
  78         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  79         {
  80                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  81                 errno = EINVAL;
  82                 return NULL;
  83         }
  84         return aceint;
  85 }
  86
  87 SMB4ACL_T *smb_create_smb4acl(void)
  88 {
  89         TALLOC_CTX *mem_ctx = talloc_tos();
  90         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  91         if (theacl==NULL)
  92         {
  93                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  94                 errno = ENOMEM;
  95                 return NULL;
  96         }
  97         theacl->magic = SMB_ACL4_INT_MAGIC;
  98         /* theacl->first, last = NULL not needed */
  99         return (SMB4ACL_T *)theacl;
 100 }
 101
 102 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
 103 {
 104         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 105         TALLOC_CTX *mem_ctx = talloc_tos();
 106         SMB_ACE4_INT_T *ace;
 107
 108         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 109         if (ace==NULL)
 110         {
 111                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 112                 errno = ENOMEM;
 113                 return NULL;
 114         }
 115         ace->magic = SMB_ACE4_INT_MAGIC;
 116         /* ace->next = NULL not needed */
 117         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 118
 119         if (aclint->first==NULL)
 120         {
 121                 aclint->first = ace;
 122                 aclint->last = ace;
 123         } else {
 124                 aclint->last->next = (void *)ace;
 125                 aclint->last = ace;
 126         }
 127         aclint->naces++;
 128
 129         return (SMB4ACE_T *)ace;
 130 }
 131
 132 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 133 {
 134         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 135         if (aceint==NULL)
 136                 return NULL;
 137
 138         return &aceint->prop;
 139 }
 140
 141 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 142 {
 143         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 144         if (aceint==NULL)
 145                 return NULL;
 146
 147         return (SMB4ACE_T *)aceint->next;
 148 }
 149
 150 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 151 {
 152         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 153         if (aclint==NULL)
 154                 return NULL;
 155
 156         return (SMB4ACE_T *)aclint->first;
 157 }
 158
 159 uint32 smb_get_naces(SMB4ACL_T *theacl)
 160 {
 161         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 162         if (aclint==NULL)
 163                 return 0;
 164
 165         return aclint->naces;
 166 }
 167
 168 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 169                                 const char *filename,
 170                                 SMB_STRUCT_STAT *psbuf)
 171 {
 172         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 173
 174         /* Get the stat struct for the owner info. */
 175         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 176         {
 177                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 178                         strerror(errno)));
 179                 return -1;
 180         }
 181
 182         return 0;
 183 }
 184
 185 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 186 {
 187         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 188
 189         if (fsp->is_directory || fsp->fh->fd == -1) {
 190                 return smbacl4_GetFileOwner(fsp->conn,
 191                                             fsp->fsp_name->base_name, psbuf);
 192         }
 193         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 194         {
 195                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 196                         strerror(errno)));
 197                 return -1;
 198         }
 199
 200         return 0;
 201 }
 202
 203 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 204         struct dom_sid *psid_owner, /* in */
 205         struct dom_sid *psid_group, /* in */
 206         bool is_directory, /* in */
 207         struct security_ace **ppnt_ace_list, /* out */
 208         int *pgood_aces /* out */
 209 )
 210 {
 211         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 212         SMB_ACE4_INT_T *aceint;
 213         struct security_ace *nt_ace_list = NULL;
 214         int good_aces = 0;
 215
 216         DEBUG(10, ("smbacl_nfs42win entered\n"));
 217
 218         aclint = get_validated_aclint(theacl);
 219         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 220         /* in smb_get_nt_acl_nfs4(). */
 221         nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
 222         if (nt_ace_list==NULL)
 223         {
 224                 DEBUG(10, ("talloc error"));
 225                 errno = ENOMEM;
 226                 return False;
 227         }
 228
 229         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 230                 uint32_t mask;
 231                 struct dom_sid sid;
 232                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 233                 uint32_t mapped_ace_flags;
 234
 235                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 236                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 237                         ace->aceFlags, ace->aceMask, ace->who.id));
 238
 239                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 240
 241                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 242                         switch (ace->who.special_id) {
 243                         case SMB_ACE4_WHO_OWNER:
 244                                 sid_copy(&sid, psid_owner);
 245                                 break;
 246                         case SMB_ACE4_WHO_GROUP:
 247                                 sid_copy(&sid, psid_group);
 248                                 break;
 249                         case SMB_ACE4_WHO_EVERYONE:
 250                                 sid_copy(&sid, &global_sid_World);
 251                                 break;
 252                         default:
 253                                 DEBUG(8, ("invalid special who id %d "
 254                                         "ignored\n", ace->who.special_id));
 255                         }
 256                 } else {
 257                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 258                                 gid_to_sid(&sid, ace->who.gid);
 259                         } else {
 260                                 uid_to_sid(&sid, ace->who.uid);
 261                         }
 262                 }
 263                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 264                            sid_string_dbg(&sid)));
 265
 266                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 267                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 268                 }
 269
 270                 mapped_ace_flags = ace->aceFlags & 0xf;
 271                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 272                         /*
 273                          * GPFS sets inherits dir_inhert and file_inherit flags
 274                          * to files, too, which confuses windows, and seems to
 275                          * be wrong anyways. ==> Map these bits away for files.
 276                          */
 277                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 278                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 279                 }
 280                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 281                       ace->aceFlags, mapped_ace_flags));
 282
 283                 mask = ace->aceMask;
 284                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 285                         ace->aceType, mask,
 286                         mapped_ace_flags);
 287         }
 288
 289         *ppnt_ace_list = nt_ace_list;
 290         *pgood_aces = good_aces;
 291
 292         return True;
 293 }
 294
 295 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 296         uint32 security_info,
 297         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 298 {
 299         int     good_aces = 0;
 300         struct dom_sid sid_owner, sid_group;
 301         size_t sd_size = 0;
 302         struct security_ace *nt_ace_list = NULL;
 303         struct security_acl *psa = NULL;
 304         TALLOC_CTX *mem_ctx = talloc_tos();
 305
 306         if (theacl==NULL || smb_get_naces(theacl)==0)
 307                 return NT_STATUS_ACCESS_DENIED; /* special because we
 308                                                  * shouldn't alloc 0 for
 309                                                  * win */
 310
 311         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 312         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 313
 314         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 315                              S_ISDIR(sbuf->st_ex_mode),
 316                                 &nt_ace_list, &good_aces)==False) {
 317                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 318                 return map_nt_error_from_unix(errno);
 319         }
 320
 321         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 322         if (psa == NULL) {
 323                 DEBUG(2,("make_sec_acl failed\n"));
 324                 return NT_STATUS_NO_MEMORY;
 325         }
 326
 327         DEBUG(10,("after make sec_acl\n"));
 328         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 329                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 330                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 331                                 NULL, psa, &sd_size);
 332         if (*ppdesc==NULL) {
 333                 DEBUG(2,("make_sec_desc failed\n"));
 334                 return NT_STATUS_NO_MEMORY;
 335         }
 336
 337         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 338                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 339
 340         return NT_STATUS_OK;
 341 }
 342
 343 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 344                                uint32 security_info,
 345                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 346 {
 347         SMB_STRUCT_STAT sbuf;
 348
 349         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 350
 351         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 352                 return map_nt_error_from_unix(errno);
 353         }
 354
 355         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 356 }
 357
 358 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 359                               const char *name,
 360                               uint32 security_info,
 361                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 362 {
 363         SMB_STRUCT_STAT sbuf;
 364
 365         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 366
 367         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 368                 return map_nt_error_from_unix(errno);
 369         }
 370
 371         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 372 }
 373
 374 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 375 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 376
 377 typedef struct _smbacl4_vfs_params {
 378         enum smbacl4_mode_enum mode;
 379         bool do_chown;
 380         enum smbacl4_acedup_enum acedup;
 381         struct db_context *sid_mapping_table;
 382 } smbacl4_vfs_params;
 383
 384 /*
 385  * Gather special parameters for NFS4 ACL handling
 386  */
 387 static int smbacl4_get_vfs_params(
 388         const char *type_name,
 389         files_struct *fsp,
 390         smbacl4_vfs_params *params
 391 )
 392 {
 393         static const struct enum_list enum_smbacl4_modes[] = {
 394                 { e_simple, "simple" },
 395                 { e_special, "special" }
 396         };
 397         static const struct enum_list enum_smbacl4_acedups[] = {
 398                 { e_dontcare, "dontcare" },
 399                 { e_reject, "reject" },
 400                 { e_ignore, "ignore" },
 401                 { e_merge, "merge" },
 402         };
 403
 404         memset(params, 0, sizeof(smbacl4_vfs_params));
 405         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 406                 SNUM(fsp->conn), type_name,
 407                 "mode", enum_smbacl4_modes, e_simple);
 408         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 409                 "chown", True);
 410         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 411                 SNUM(fsp->conn), type_name,
 412                 "acedup", enum_smbacl4_acedups, e_dontcare);
 413
 414         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 415                 enum_smbacl4_modes[params->mode].name,
 416                 params->do_chown ? "true" : "false",
 417                 enum_smbacl4_acedups[params->acedup].name));
 418
 419         return 0;
 420 }
 421
 422 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 423 {
 424         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 425         SMB_ACE4_INT_T *aceint;
 426
 427         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 428
 429         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 430                 SMB_ACE4PROP_T *ace = &aceint->prop;
 431
 432                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 433                         ace->aceType,
 434                         ace->aceFlags, ace->flags,
 435                         ace->aceMask,
 436                         ace->who.id));
 437         }
 438 }
 439
 440 /*
 441  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 442  * match nonzero if "special" and who is equal
 443  * return ace if found matching; otherwise NULL
 444  */
 445 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 446         SMB4ACL_T *theacl,
 447         SMB_ACE4PROP_T *aceNew)
 448 {
 449         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 450         SMB_ACE4_INT_T *aceint;
 451
 452         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 453                 SMB_ACE4PROP_T *ace = &aceint->prop;
 454
 455                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 456                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 457                           ace->aceType, ace->flags, ace->aceFlags,
 458                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 459
 460                 if (ace->flags == aceNew->flags &&
 461                         ace->aceType==aceNew->aceType &&
 462                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 463                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 464                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 465                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 466                 ) {
 467                         /* keep type safety; e.g. gid is an u.short */
 468                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 469                         {
 470                                 if (ace->who.special_id==aceNew->who.special_id)
 471                                         return ace;
 472                         } else {
 473                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 474                                 {
 475                                         if (ace->who.gid==aceNew->who.gid)
 476                                                 return ace;
 477                                 } else {
 478                                         if (ace->who.uid==aceNew->who.uid)
 479                                                 return ace;
 480                                 }
 481                         }
 482                 }
 483         }
 484
 485         return NULL;
 486 }
 487
 488 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 489                          struct dom_sid *dst)
 490 {
 491         static struct db_context *mapping_db = NULL;
 492         TDB_DATA data;
 493
 494         if (mapping_db == NULL) {
 495                 const char *dbname = lp_parm_const_string(
 496                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 497
 498                 if (dbname == NULL) {
 499                         DEBUG(10, ("%s:sidmap not defined\n",
 500                                    SMBACL4_PARAM_TYPE_NAME));
 501                         return False;
 502                 }
 503
 504                 become_root();
 505                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 506                                      O_RDONLY, 0600);
 507                 unbecome_root();
 508
 509                 if (mapping_db == NULL) {
 510                         DEBUG(1, ("could not open sidmap: %s\n",
 511                                   strerror(errno)));
 512                         return False;
 513                 }
 514         }
 515
 516         if (mapping_db->fetch(mapping_db, NULL,
 517                               string_term_tdb_data(sid_string_tos(src)),
 518                               &data) == -1) {
 519                 DEBUG(10, ("could not find mapping for SID %s\n",
 520                            sid_string_dbg(src)));
 521                 return False;
 522         }
 523
 524         if ((data.dptr == NULL) || (data.dsize <= 0)
 525             || (data.dptr[data.dsize-1] != '\0')) {
 526                 DEBUG(5, ("invalid mapping for SID %s\n",
 527                           sid_string_dbg(src)));
 528                 TALLOC_FREE(data.dptr);
 529                 return False;
 530         }
 531
 532         if (!string_to_sid(dst, (char *)data.dptr)) {
 533                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 534                           (char *)data.dptr, sid_string_dbg(src)));
 535                 TALLOC_FREE(data.dptr);
 536                 return False;
 537         }
 538
 539         TALLOC_FREE(data.dptr);
 540
 541         return True;
 542 }
 543
 544 static bool smbacl4_fill_ace4(
 545         TALLOC_CTX *mem_ctx,
 546         const char *filename,
 547         smbacl4_vfs_params *params,
 548         uid_t ownerUID,
 549         gid_t ownerGID,
 550         const struct security_ace *ace_nt, /* input */
 551         SMB_ACE4PROP_T *ace_v4 /* output */
 552 )
 553 {
 554         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 555
 556         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 557         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 558         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 559         ace_v4->aceMask = ace_nt->access_mask &
 560                 (SEC_STD_ALL | SEC_FILE_ALL);
 561
 562         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 563
 564         if (ace_v4->aceFlags!=ace_nt->flags)
 565                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 566                         ace_v4->aceFlags, ace_nt->flags));
 567
 568         if (ace_v4->aceMask!=ace_nt->access_mask)
 569                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 570                         ace_v4->aceMask, ace_nt->access_mask));
 571
 572         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 573                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 574                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 575         } else {
 576                 const char *dom, *name;
 577                 enum lsa_SidType type;
 578                 uid_t uid;
 579                 gid_t gid;
 580                 struct dom_sid sid;
 581
 582                 sid_copy(&sid, &ace_nt->trustee);
 583
 584                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 585
 586                         struct dom_sid mapped;
 587
 588                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 589                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 590                                           "unknown\n", filename, sid_string_dbg(&sid)));
 591                                 errno = EINVAL;
 592                                 return False;
 593                         }
 594
 595                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 596                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 597
 598                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 599                                         &name, &type)) {
 600                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 601                                           "mapped from %s is unknown\n",
 602                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 603                                 errno = EINVAL;
 604                                 return False;
 605                         }
 606
 607                         sid_copy(&sid, &mapped);
 608                 }
 609
 610                 if (type == SID_NAME_USER) {
 611                         if (!sid_to_uid(&sid, &uid)) {
 612                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 613                                           "convert %s to uid\n", filename,
 614                                           sid_string_dbg(&sid)));
 615                                 return False;
 616                         }
 617
 618                         if (params->mode==e_special && uid==ownerUID) {
 619                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 620                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 621                         } else {
 622                                 ace_v4->who.uid = uid;
 623                         }
 624                 } else { /* else group? - TODO check it... */
 625                         if (!sid_to_gid(&sid, &gid)) {
 626                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 627                                           "convert %s to gid\n", filename,
 628                                           sid_string_dbg(&sid)));
 629                                 return False;
 630                         }
 631
 632                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 633
 634                         if (params->mode==e_special && gid==ownerGID) {
 635                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 636                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 637                         } else {
 638                                 ace_v4->who.gid = gid;
 639                         }
 640                 }
 641         }
 642
 643         return True; /* OK */
 644 }
 645
 646 static int smbacl4_MergeIgnoreReject(
 647         enum smbacl4_acedup_enum acedup,
 648         SMB4ACL_T *theacl, /* may modify it */
 649         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 650         bool    *paddNewACE,
 651         int     i
 652 )
 653 {
 654         int     result = 0;
 655         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 656         if (ace4found)
 657         {
 658                 switch(acedup)
 659                 {
 660                 case e_merge: /* "merge" flags */
 661                         *paddNewACE = False;
 662                         ace4found->aceFlags |= ace->aceFlags;
 663                         ace4found->aceMask |= ace->aceMask;
 664                         break;
 665                 case e_ignore: /* leave out this record */
 666                         *paddNewACE = False;
 667                         break;
 668                 case e_reject: /* do an error */
 669                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 670                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 671                         result = -1;
 672                         break;
 673                 default:
 674                         break;
 675                 }
 676         }
 677         return result;
 678 }
 679
 680 static SMB4ACL_T *smbacl4_win2nfs4(
 681         const char *filename,
 682         const struct security_acl *dacl,
 683         smbacl4_vfs_params *pparams,
 684         uid_t ownerUID,
 685         gid_t ownerGID
 686 )
 687 {
 688         SMB4ACL_T *theacl;
 689         uint32  i;
 690         TALLOC_CTX *mem_ctx = talloc_tos();
 691
 692         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 693
 694         theacl = smb_create_smb4acl();
 695         if (theacl==NULL)
 696                 return NULL;
 697
 698         for(i=0; i<dacl->num_aces; i++) {
 699                 SMB_ACE4PROP_T  ace_v4;
 700                 bool    addNewACE = True;
 701
 702                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 703                                        ownerUID, ownerGID,
 704                                        dacl->aces + i, &ace_v4)) {
 705                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 706                                   filename,
 707                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 708                         continue;
 709                 }
 710
 711                 if (pparams->acedup!=e_dontcare) {
 712                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 713                                 &ace_v4, &addNewACE, i))
 714                                 return NULL;
 715                 }
 716
 717                 if (addNewACE)
 718                         smb_add_ace4(theacl, &ace_v4);
 719         }
 720
 721         return theacl;
 722 }
 723
 724 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 725         uint32 security_info_sent,
 726         const struct security_descriptor *psd,
 727         set_nfs4acl_native_fn_t set_nfs4_native)
 728 {
 729         smbacl4_vfs_params params;
 730         SMB4ACL_T *theacl = NULL;
 731         bool    result;
 732
 733         SMB_STRUCT_STAT sbuf;
 734         bool set_acl_as_root = false;
 735         uid_t newUID = (uid_t)-1;
 736         gid_t newGID = (gid_t)-1;
 737         int saved_errno;
 738
 739         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 740
 741         if ((security_info_sent & (SECINFO_DACL |
 742                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 743         {
 744                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 745                         security_info_sent));
 746                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 747         }
 748
 749         /* Special behaviours */
 750         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 751                 return NT_STATUS_NO_MEMORY;
 752
 753         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 754                 return map_nt_error_from_unix(errno);
 755
 756         if (params.do_chown) {
 757                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 758                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 759                 if (!NT_STATUS_IS_OK(status)) {
 760                         DEBUG(8, ("unpack_nt_owners failed"));
 761                         return status;
 762                 }
 763                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 764                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 765
 766                         if(try_chown(fsp->conn, fsp->fsp_name, newUID,
 767                                      newGID)) {
 768                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 769                                          "%s.\n", fsp_str_dbg(fsp),
 770                                          (unsigned int)newUID,
 771                                          (unsigned int)newGID,
 772                                          strerror(errno)));
 773                                 return map_nt_error_from_unix(errno);
 774                         }
 775
 776                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 777                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 778                                   (unsigned int)newGID));
 779                         if (smbacl4_GetFileOwner(fsp->conn,
 780                                                  fsp->fsp_name->base_name,
 781                                                  &sbuf))
 782                                 return map_nt_error_from_unix(errno);
 783
 784                         /* If we successfully chowned, we know we must
 785                          * be able to set the acl, so do it as root.
 786                          */
 787                         set_acl_as_root = true;
 788                 }
 789         }
 790
 791         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 792                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 793                 return NT_STATUS_OK;
 794         }
 795
 796         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 797                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 798         if (!theacl)
 799                 return map_nt_error_from_unix(errno);
 800
 801         smbacl4_dump_nfs4acl(10, theacl);
 802
 803         if (set_acl_as_root) {
 804                 become_root();
 805         }
 806         result = set_nfs4_native(fsp, theacl);
 807         saved_errno = errno;
 808         if (set_acl_as_root) {
 809                 unbecome_root();
 810         }
 811         if (result!=True) {
 812                 errno = saved_errno;
 813                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 814                 return map_nt_error_from_unix(errno);
 815         }
 816
 817         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 818         return NT_STATUS_OK;
 819 }