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 "smbd/smbd.h"
  22 #include "nfs4_acls.h"
  23 #include "librpc/gen_ndr/ndr_security.h"
  24 #include "../libcli/security/dom_sid.h"
  25 #include "../libcli/security/security.h"
  26 #include "include/dbwrap.h"
  27 #include "system/filesys.h"
  28 #include "passdb/lookup_sid.h"
  29 #include "util_tdb.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_ACLS
  33
  34 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  35
  36 extern const struct generic_mapping file_generic_mapping;
  37
  38 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  39 typedef struct _SMB_ACE4_INT_T
  40 {
  41         uint32  magic;
  42         SMB_ACE4PROP_T  prop;
  43         void    *next;
  44 } SMB_ACE4_INT_T;
  45
  46 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  47 typedef struct _SMB_ACL4_INT_T
  48 {
  49         uint32  magic;
  50         uint32  naces;
  51         SMB_ACE4_INT_T  *first;
  52         SMB_ACE4_INT_T  *last;
  53 } SMB_ACL4_INT_T;
  54
  55 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  56 {
  57         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  58         if (theacl==NULL)
  59         {
  60                 DEBUG(2, ("acl is NULL\n"));
  61                 errno = EINVAL;
  62                 return NULL;
  63         }
  64         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  65         {
  66                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  67                 errno = EINVAL;
  68                 return NULL;
  69         }
  70         return aclint;
  71 }
  72
  73 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  74 {
  75         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  76         if (ace==NULL)
  77         {
  78                 DEBUG(2, ("ace is NULL\n"));
  79                 errno = EINVAL;
  80                 return NULL;
  81         }
  82         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  83         {
  84                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  85                 errno = EINVAL;
  86                 return NULL;
  87         }
  88         return aceint;
  89 }
  90
  91 SMB4ACL_T *smb_create_smb4acl(void)
  92 {
  93         TALLOC_CTX *mem_ctx = talloc_tos();
  94         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  95         if (theacl==NULL)
  96         {
  97                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  98                 errno = ENOMEM;
  99                 return NULL;
 100         }
 101         theacl->magic = SMB_ACL4_INT_MAGIC;
 102         /* theacl->first, last = NULL not needed */
 103         return (SMB4ACL_T *)theacl;
 104 }
 105
 106 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
 107 {
 108         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 109         TALLOC_CTX *mem_ctx = talloc_tos();
 110         SMB_ACE4_INT_T *ace;
 111
 112         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 113         if (ace==NULL)
 114         {
 115                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 116                 errno = ENOMEM;
 117                 return NULL;
 118         }
 119         ace->magic = SMB_ACE4_INT_MAGIC;
 120         /* ace->next = NULL not needed */
 121         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 122
 123         if (aclint->first==NULL)
 124         {
 125                 aclint->first = ace;
 126                 aclint->last = ace;
 127         } else {
 128                 aclint->last->next = (void *)ace;
 129                 aclint->last = ace;
 130         }
 131         aclint->naces++;
 132
 133         return (SMB4ACE_T *)ace;
 134 }
 135
 136 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 137 {
 138         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 139         if (aceint==NULL)
 140                 return NULL;
 141
 142         return &aceint->prop;
 143 }
 144
 145 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 146 {
 147         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 148         if (aceint==NULL)
 149                 return NULL;
 150
 151         return (SMB4ACE_T *)aceint->next;
 152 }
 153
 154 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 155 {
 156         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 157         if (aclint==NULL)
 158                 return NULL;
 159
 160         return (SMB4ACE_T *)aclint->first;
 161 }
 162
 163 uint32 smb_get_naces(SMB4ACL_T *theacl)
 164 {
 165         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 166         if (aclint==NULL)
 167                 return 0;
 168
 169         return aclint->naces;
 170 }
 171
 172 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 173                                 const char *filename,
 174                                 SMB_STRUCT_STAT *psbuf)
 175 {
 176         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 177
 178         /* Get the stat struct for the owner info. */
 179         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 180         {
 181                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 182                         strerror(errno)));
 183                 return -1;
 184         }
 185
 186         return 0;
 187 }
 188
 189 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 190 {
 191         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 192
 193         if (fsp->fh->fd == -1) {
 194                 return smbacl4_GetFileOwner(fsp->conn,
 195                                             fsp->fsp_name->base_name, psbuf);
 196         }
 197         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 198         {
 199                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 200                         strerror(errno)));
 201                 return -1;
 202         }
 203
 204         return 0;
 205 }
 206
 207 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 208         struct dom_sid *psid_owner, /* in */
 209         struct dom_sid *psid_group, /* in */
 210         bool is_directory, /* in */
 211         struct security_ace **ppnt_ace_list, /* out */
 212         int *pgood_aces /* out */
 213 )
 214 {
 215         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 216         SMB_ACE4_INT_T *aceint;
 217         struct security_ace *nt_ace_list = NULL;
 218         int good_aces = 0;
 219
 220         DEBUG(10, ("smbacl_nfs42win entered\n"));
 221
 222         aclint = get_validated_aclint(theacl);
 223         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 224         /* in smb_get_nt_acl_nfs4(). */
 225         nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
 226         if (nt_ace_list==NULL)
 227         {
 228                 DEBUG(10, ("talloc error"));
 229                 errno = ENOMEM;
 230                 return False;
 231         }
 232
 233         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 234                 uint32_t mask;
 235                 struct dom_sid sid;
 236                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 237                 uint32_t mapped_ace_flags;
 238
 239                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 240                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 241                         ace->aceFlags, ace->aceMask, ace->who.id));
 242
 243                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 244
 245                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 246                         switch (ace->who.special_id) {
 247                         case SMB_ACE4_WHO_OWNER:
 248                                 sid_copy(&sid, psid_owner);
 249                                 break;
 250                         case SMB_ACE4_WHO_GROUP:
 251                                 sid_copy(&sid, psid_group);
 252                                 break;
 253                         case SMB_ACE4_WHO_EVERYONE:
 254                                 sid_copy(&sid, &global_sid_World);
 255                                 break;
 256                         default:
 257                                 DEBUG(8, ("invalid special who id %d "
 258                                         "ignored\n", ace->who.special_id));
 259                         }
 260                 } else {
 261                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 262                                 gid_to_sid(&sid, ace->who.gid);
 263                         } else {
 264                                 uid_to_sid(&sid, ace->who.uid);
 265                         }
 266                 }
 267                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 268                            sid_string_dbg(&sid)));
 269
 270                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 271                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 272                 }
 273
 274                 mapped_ace_flags = ace->aceFlags & 0xf;
 275                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 276                         /*
 277                          * GPFS sets inherits dir_inhert and file_inherit flags
 278                          * to files, too, which confuses windows, and seems to
 279                          * be wrong anyways. ==> Map these bits away for files.
 280                          */
 281                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 282                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 283                 }
 284                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 285                       ace->aceFlags, mapped_ace_flags));
 286
 287                 /* Windows clients expect SYNC on acls to
 288                    correctly allow rename. See bug #7909. */
 289                 mask = ace->aceMask | SMB_ACE4_SYNCHRONIZE;
 290                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 291                         ace->aceType, mask,
 292                         mapped_ace_flags);
 293         }
 294
 295         *ppnt_ace_list = nt_ace_list;
 296         *pgood_aces = good_aces;
 297
 298         return True;
 299 }
 300
 301 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 302         uint32 security_info,
 303         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 304 {
 305         int     good_aces = 0;
 306         struct dom_sid sid_owner, sid_group;
 307         size_t sd_size = 0;
 308         struct security_ace *nt_ace_list = NULL;
 309         struct security_acl *psa = NULL;
 310         TALLOC_CTX *mem_ctx = talloc_tos();
 311
 312         if (theacl==NULL || smb_get_naces(theacl)==0)
 313                 return NT_STATUS_ACCESS_DENIED; /* special because we
 314                                                  * shouldn't alloc 0 for
 315                                                  * win */
 316
 317         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 318         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 319
 320         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 321                              S_ISDIR(sbuf->st_ex_mode),
 322                                 &nt_ace_list, &good_aces)==False) {
 323                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 324                 return map_nt_error_from_unix(errno);
 325         }
 326
 327         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 328         if (psa == NULL) {
 329                 DEBUG(2,("make_sec_acl failed\n"));
 330                 return NT_STATUS_NO_MEMORY;
 331         }
 332
 333         DEBUG(10,("after make sec_acl\n"));
 334         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 335                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 336                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 337                                 NULL, psa, &sd_size);
 338         if (*ppdesc==NULL) {
 339                 DEBUG(2,("make_sec_desc failed\n"));
 340                 return NT_STATUS_NO_MEMORY;
 341         }
 342
 343         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 344                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 345
 346         return NT_STATUS_OK;
 347 }
 348
 349 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 350                                uint32 security_info,
 351                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 352 {
 353         SMB_STRUCT_STAT sbuf;
 354
 355         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 356
 357         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 358                 return map_nt_error_from_unix(errno);
 359         }
 360
 361         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 362 }
 363
 364 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 365                               const char *name,
 366                               uint32 security_info,
 367                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 368 {
 369         SMB_STRUCT_STAT sbuf;
 370
 371         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 372
 373         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 374                 return map_nt_error_from_unix(errno);
 375         }
 376
 377         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 378 }
 379
 380 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 381 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 382
 383 typedef struct _smbacl4_vfs_params {
 384         enum smbacl4_mode_enum mode;
 385         bool do_chown;
 386         enum smbacl4_acedup_enum acedup;
 387         struct db_context *sid_mapping_table;
 388 } smbacl4_vfs_params;
 389
 390 /*
 391  * Gather special parameters for NFS4 ACL handling
 392  */
 393 static int smbacl4_get_vfs_params(
 394         const char *type_name,
 395         files_struct *fsp,
 396         smbacl4_vfs_params *params
 397 )
 398 {
 399         static const struct enum_list enum_smbacl4_modes[] = {
 400                 { e_simple, "simple" },
 401                 { e_special, "special" }
 402         };
 403         static const struct enum_list enum_smbacl4_acedups[] = {
 404                 { e_dontcare, "dontcare" },
 405                 { e_reject, "reject" },
 406                 { e_ignore, "ignore" },
 407                 { e_merge, "merge" },
 408         };
 409
 410         memset(params, 0, sizeof(smbacl4_vfs_params));
 411         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 412                 SNUM(fsp->conn), type_name,
 413                 "mode", enum_smbacl4_modes, e_simple);
 414         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 415                 "chown", True);
 416         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 417                 SNUM(fsp->conn), type_name,
 418                 "acedup", enum_smbacl4_acedups, e_dontcare);
 419
 420         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 421                 enum_smbacl4_modes[params->mode].name,
 422                 params->do_chown ? "true" : "false",
 423                 enum_smbacl4_acedups[params->acedup].name));
 424
 425         return 0;
 426 }
 427
 428 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 429 {
 430         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 431         SMB_ACE4_INT_T *aceint;
 432
 433         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 434
 435         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 436                 SMB_ACE4PROP_T *ace = &aceint->prop;
 437
 438                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 439                         ace->aceType,
 440                         ace->aceFlags, ace->flags,
 441                         ace->aceMask,
 442                         ace->who.id));
 443         }
 444 }
 445
 446 /*
 447  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 448  * match nonzero if "special" and who is equal
 449  * return ace if found matching; otherwise NULL
 450  */
 451 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 452         SMB4ACL_T *theacl,
 453         SMB_ACE4PROP_T *aceNew)
 454 {
 455         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 456         SMB_ACE4_INT_T *aceint;
 457
 458         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 459                 SMB_ACE4PROP_T *ace = &aceint->prop;
 460
 461                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 462                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 463                           ace->aceType, ace->flags, ace->aceFlags,
 464                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 465
 466                 if (ace->flags == aceNew->flags &&
 467                         ace->aceType==aceNew->aceType &&
 468                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 469                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 470                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 471                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 472                 ) {
 473                         /* keep type safety; e.g. gid is an u.short */
 474                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 475                         {
 476                                 if (ace->who.special_id==aceNew->who.special_id)
 477                                         return ace;
 478                         } else {
 479                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 480                                 {
 481                                         if (ace->who.gid==aceNew->who.gid)
 482                                                 return ace;
 483                                 } else {
 484                                         if (ace->who.uid==aceNew->who.uid)
 485                                                 return ace;
 486                                 }
 487                         }
 488                 }
 489         }
 490
 491         return NULL;
 492 }
 493
 494 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 495                          struct dom_sid *dst)
 496 {
 497         static struct db_context *mapping_db = NULL;
 498         TDB_DATA data;
 499
 500         if (mapping_db == NULL) {
 501                 const char *dbname = lp_parm_const_string(
 502                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 503
 504                 if (dbname == NULL) {
 505                         DEBUG(10, ("%s:sidmap not defined\n",
 506                                    SMBACL4_PARAM_TYPE_NAME));
 507                         return False;
 508                 }
 509
 510                 become_root();
 511                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 512                                      O_RDONLY, 0600);
 513                 unbecome_root();
 514
 515                 if (mapping_db == NULL) {
 516                         DEBUG(1, ("could not open sidmap: %s\n",
 517                                   strerror(errno)));
 518                         return False;
 519                 }
 520         }
 521
 522         if (mapping_db->fetch(mapping_db, NULL,
 523                               string_term_tdb_data(sid_string_tos(src)),
 524                               &data) == -1) {
 525                 DEBUG(10, ("could not find mapping for SID %s\n",
 526                            sid_string_dbg(src)));
 527                 return False;
 528         }
 529
 530         if ((data.dptr == NULL) || (data.dsize <= 0)
 531             || (data.dptr[data.dsize-1] != '\0')) {
 532                 DEBUG(5, ("invalid mapping for SID %s\n",
 533                           sid_string_dbg(src)));
 534                 TALLOC_FREE(data.dptr);
 535                 return False;
 536         }
 537
 538         if (!string_to_sid(dst, (char *)data.dptr)) {
 539                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 540                           (char *)data.dptr, sid_string_dbg(src)));
 541                 TALLOC_FREE(data.dptr);
 542                 return False;
 543         }
 544
 545         TALLOC_FREE(data.dptr);
 546
 547         return True;
 548 }
 549
 550 static bool smbacl4_fill_ace4(
 551         TALLOC_CTX *mem_ctx,
 552         const char *filename,
 553         smbacl4_vfs_params *params,
 554         uid_t ownerUID,
 555         gid_t ownerGID,
 556         const struct security_ace *ace_nt, /* input */
 557         SMB_ACE4PROP_T *ace_v4 /* output */
 558 )
 559 {
 560         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 561
 562         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 563         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 564         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 565         ace_v4->aceMask = ace_nt->access_mask &
 566                 (SEC_STD_ALL | SEC_FILE_ALL);
 567
 568         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 569
 570         if (ace_v4->aceFlags!=ace_nt->flags)
 571                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 572                         ace_v4->aceFlags, ace_nt->flags));
 573
 574         if (ace_v4->aceMask!=ace_nt->access_mask)
 575                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 576                         ace_v4->aceMask, ace_nt->access_mask));
 577
 578         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 579                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 580                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 581         } else {
 582                 const char *dom, *name;
 583                 enum lsa_SidType type;
 584                 uid_t uid;
 585                 gid_t gid;
 586                 struct dom_sid sid;
 587
 588                 sid_copy(&sid, &ace_nt->trustee);
 589
 590                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 591
 592                         struct dom_sid mapped;
 593
 594                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 595                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 596                                           "unknown\n", filename, sid_string_dbg(&sid)));
 597                                 errno = EINVAL;
 598                                 return False;
 599                         }
 600
 601                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 602                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 603
 604                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 605                                         &name, &type)) {
 606                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 607                                           "mapped from %s is unknown\n",
 608                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 609                                 errno = EINVAL;
 610                                 return False;
 611                         }
 612
 613                         sid_copy(&sid, &mapped);
 614                 }
 615
 616                 if (type == SID_NAME_USER) {
 617                         if (!sid_to_uid(&sid, &uid)) {
 618                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 619                                           "convert %s to uid\n", filename,
 620                                           sid_string_dbg(&sid)));
 621                                 return False;
 622                         }
 623
 624                         if (params->mode==e_special && uid==ownerUID) {
 625                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 626                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 627                         } else {
 628                                 ace_v4->who.uid = uid;
 629                         }
 630                 } else { /* else group? - TODO check it... */
 631                         if (!sid_to_gid(&sid, &gid)) {
 632                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 633                                           "convert %s to gid\n", filename,
 634                                           sid_string_dbg(&sid)));
 635                                 return False;
 636                         }
 637
 638                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 639
 640                         if (params->mode==e_special && gid==ownerGID) {
 641                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 642                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 643                         } else {
 644                                 ace_v4->who.gid = gid;
 645                         }
 646                 }
 647         }
 648
 649         return True; /* OK */
 650 }
 651
 652 static int smbacl4_MergeIgnoreReject(
 653         enum smbacl4_acedup_enum acedup,
 654         SMB4ACL_T *theacl, /* may modify it */
 655         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 656         bool    *paddNewACE,
 657         int     i
 658 )
 659 {
 660         int     result = 0;
 661         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 662         if (ace4found)
 663         {
 664                 switch(acedup)
 665                 {
 666                 case e_merge: /* "merge" flags */
 667                         *paddNewACE = False;
 668                         ace4found->aceFlags |= ace->aceFlags;
 669                         ace4found->aceMask |= ace->aceMask;
 670                         break;
 671                 case e_ignore: /* leave out this record */
 672                         *paddNewACE = False;
 673                         break;
 674                 case e_reject: /* do an error */
 675                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 676                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 677                         result = -1;
 678                         break;
 679                 default:
 680                         break;
 681                 }
 682         }
 683         return result;
 684 }
 685
 686 static SMB4ACL_T *smbacl4_win2nfs4(
 687         const char *filename,
 688         const struct security_acl *dacl,
 689         smbacl4_vfs_params *pparams,
 690         uid_t ownerUID,
 691         gid_t ownerGID
 692 )
 693 {
 694         SMB4ACL_T *theacl;
 695         uint32  i;
 696         TALLOC_CTX *mem_ctx = talloc_tos();
 697
 698         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 699
 700         theacl = smb_create_smb4acl();
 701         if (theacl==NULL)
 702                 return NULL;
 703
 704         for(i=0; i<dacl->num_aces; i++) {
 705                 SMB_ACE4PROP_T  ace_v4;
 706                 bool    addNewACE = True;
 707
 708                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 709                                        ownerUID, ownerGID,
 710                                        dacl->aces + i, &ace_v4)) {
 711                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 712                                   filename,
 713                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 714                         continue;
 715                 }
 716
 717                 if (pparams->acedup!=e_dontcare) {
 718                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 719                                 &ace_v4, &addNewACE, i))
 720                                 return NULL;
 721                 }
 722
 723                 if (addNewACE)
 724                         smb_add_ace4(theacl, &ace_v4);
 725         }
 726
 727         return theacl;
 728 }
 729
 730 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 731         uint32 security_info_sent,
 732         const struct security_descriptor *psd,
 733         set_nfs4acl_native_fn_t set_nfs4_native)
 734 {
 735         smbacl4_vfs_params params;
 736         SMB4ACL_T *theacl = NULL;
 737         bool    result;
 738
 739         SMB_STRUCT_STAT sbuf;
 740         bool set_acl_as_root = false;
 741         uid_t newUID = (uid_t)-1;
 742         gid_t newGID = (gid_t)-1;
 743         int saved_errno;
 744
 745         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 746
 747         if ((security_info_sent & (SECINFO_DACL |
 748                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 749         {
 750                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 751                         security_info_sent));
 752                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 753         }
 754
 755         /* Special behaviours */
 756         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 757                 return NT_STATUS_NO_MEMORY;
 758
 759         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 760                 return map_nt_error_from_unix(errno);
 761
 762         if (params.do_chown) {
 763                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 764                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 765                 if (!NT_STATUS_IS_OK(status)) {
 766                         DEBUG(8, ("unpack_nt_owners failed"));
 767                         return status;
 768                 }
 769                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 770                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 771
 772                         status = try_chown(fsp, newUID, newGID);
 773                         if (!NT_STATUS_IS_OK(status)) {
 774                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 775                                          "%s.\n", fsp_str_dbg(fsp),
 776                                          (unsigned int)newUID,
 777                                          (unsigned int)newGID,
 778                                          nt_errstr(status)));
 779                                 return status;
 780                         }
 781
 782                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 783                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 784                                   (unsigned int)newGID));
 785                         if (smbacl4_GetFileOwner(fsp->conn,
 786                                                  fsp->fsp_name->base_name,
 787                                                  &sbuf))
 788                                 return map_nt_error_from_unix(errno);
 789
 790                         /* If we successfully chowned, we know we must
 791                          * be able to set the acl, so do it as root.
 792                          */
 793                         set_acl_as_root = true;
 794                 }
 795         }
 796
 797         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 798                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 799                 return NT_STATUS_OK;
 800         }
 801
 802         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 803                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 804         if (!theacl)
 805                 return map_nt_error_from_unix(errno);
 806
 807         smbacl4_dump_nfs4acl(10, theacl);
 808
 809         if (set_acl_as_root) {
 810                 become_root();
 811         }
 812         result = set_nfs4_native(fsp, theacl);
 813         saved_errno = errno;
 814         if (set_acl_as_root) {
 815                 unbecome_root();
 816         }
 817         if (result!=True) {
 818                 errno = saved_errno;
 819                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 820                 return map_nt_error_from_unix(errno);
 821         }
 822
 823         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 824         return NT_STATUS_OK;
 825 }