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 (ace->aceFlags & SMB_ACE4_INHERITED_ACE) {
 276                         mapped_ace_flags |= SEC_ACE_FLAG_INHERITED_ACE;
 277                 }
 278                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 279                         /*
 280                          * GPFS sets inherits dir_inhert and file_inherit flags
 281                          * to files, too, which confuses windows, and seems to
 282                          * be wrong anyways. ==> Map these bits away for files.
 283                          */
 284                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 285                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 286                 }
 287                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 288                       ace->aceFlags, mapped_ace_flags));
 289
 290                 /* Windows clients expect SYNC on acls to
 291                    correctly allow rename. See bug #7909. */
 292                 mask = ace->aceMask | SMB_ACE4_SYNCHRONIZE;
 293                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 294                         ace->aceType, mask,
 295                         mapped_ace_flags);
 296         }
 297
 298         *ppnt_ace_list = nt_ace_list;
 299         *pgood_aces = good_aces;
 300
 301         return True;
 302 }
 303
 304 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 305         uint32 security_info,
 306         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 307 {
 308         int     good_aces = 0;
 309         struct dom_sid sid_owner, sid_group;
 310         size_t sd_size = 0;
 311         struct security_ace *nt_ace_list = NULL;
 312         struct security_acl *psa = NULL;
 313         TALLOC_CTX *mem_ctx = talloc_tos();
 314
 315         if (theacl==NULL || smb_get_naces(theacl)==0)
 316                 return NT_STATUS_ACCESS_DENIED; /* special because we
 317                                                  * shouldn't alloc 0 for
 318                                                  * win */
 319
 320         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 321         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 322
 323         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 324                              S_ISDIR(sbuf->st_ex_mode),
 325                                 &nt_ace_list, &good_aces)==False) {
 326                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 327                 return map_nt_error_from_unix(errno);
 328         }
 329
 330         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 331         if (psa == NULL) {
 332                 DEBUG(2,("make_sec_acl failed\n"));
 333                 return NT_STATUS_NO_MEMORY;
 334         }
 335
 336         DEBUG(10,("after make sec_acl\n"));
 337         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 338                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 339                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 340                                 NULL, psa, &sd_size);
 341         if (*ppdesc==NULL) {
 342                 DEBUG(2,("make_sec_desc failed\n"));
 343                 return NT_STATUS_NO_MEMORY;
 344         }
 345
 346         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 347                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 348
 349         return NT_STATUS_OK;
 350 }
 351
 352 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 353                                uint32 security_info,
 354                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 355 {
 356         SMB_STRUCT_STAT sbuf;
 357
 358         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 359
 360         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 361                 return map_nt_error_from_unix(errno);
 362         }
 363
 364         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 365 }
 366
 367 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 368                               const char *name,
 369                               uint32 security_info,
 370                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 371 {
 372         SMB_STRUCT_STAT sbuf;
 373
 374         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 375
 376         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 377                 return map_nt_error_from_unix(errno);
 378         }
 379
 380         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 381 }
 382
 383 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 384 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 385
 386 typedef struct _smbacl4_vfs_params {
 387         enum smbacl4_mode_enum mode;
 388         bool do_chown;
 389         enum smbacl4_acedup_enum acedup;
 390         struct db_context *sid_mapping_table;
 391 } smbacl4_vfs_params;
 392
 393 /*
 394  * Gather special parameters for NFS4 ACL handling
 395  */
 396 static int smbacl4_get_vfs_params(
 397         const char *type_name,
 398         files_struct *fsp,
 399         smbacl4_vfs_params *params
 400 )
 401 {
 402         static const struct enum_list enum_smbacl4_modes[] = {
 403                 { e_simple, "simple" },
 404                 { e_special, "special" }
 405         };
 406         static const struct enum_list enum_smbacl4_acedups[] = {
 407                 { e_dontcare, "dontcare" },
 408                 { e_reject, "reject" },
 409                 { e_ignore, "ignore" },
 410                 { e_merge, "merge" },
 411         };
 412
 413         memset(params, 0, sizeof(smbacl4_vfs_params));
 414         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 415                 SNUM(fsp->conn), type_name,
 416                 "mode", enum_smbacl4_modes, e_simple);
 417         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 418                 "chown", True);
 419         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 420                 SNUM(fsp->conn), type_name,
 421                 "acedup", enum_smbacl4_acedups, e_dontcare);
 422
 423         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 424                 enum_smbacl4_modes[params->mode].name,
 425                 params->do_chown ? "true" : "false",
 426                 enum_smbacl4_acedups[params->acedup].name));
 427
 428         return 0;
 429 }
 430
 431 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 432 {
 433         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 434         SMB_ACE4_INT_T *aceint;
 435
 436         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 437
 438         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 439                 SMB_ACE4PROP_T *ace = &aceint->prop;
 440
 441                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 442                         ace->aceType,
 443                         ace->aceFlags, ace->flags,
 444                         ace->aceMask,
 445                         ace->who.id));
 446         }
 447 }
 448
 449 /*
 450  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 451  * match nonzero if "special" and who is equal
 452  * return ace if found matching; otherwise NULL
 453  */
 454 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 455         SMB4ACL_T *theacl,
 456         SMB_ACE4PROP_T *aceNew)
 457 {
 458         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 459         SMB_ACE4_INT_T *aceint;
 460
 461         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 462                 SMB_ACE4PROP_T *ace = &aceint->prop;
 463
 464                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 465                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 466                           ace->aceType, ace->flags, ace->aceFlags,
 467                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 468
 469                 if (ace->flags == aceNew->flags &&
 470                         ace->aceType==aceNew->aceType &&
 471                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 472                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 473                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 474                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 475                 ) {
 476                         /* keep type safety; e.g. gid is an u.short */
 477                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 478                         {
 479                                 if (ace->who.special_id==aceNew->who.special_id)
 480                                         return ace;
 481                         } else {
 482                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 483                                 {
 484                                         if (ace->who.gid==aceNew->who.gid)
 485                                                 return ace;
 486                                 } else {
 487                                         if (ace->who.uid==aceNew->who.uid)
 488                                                 return ace;
 489                                 }
 490                         }
 491                 }
 492         }
 493
 494         return NULL;
 495 }
 496
 497 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 498                          struct dom_sid *dst)
 499 {
 500         static struct db_context *mapping_db = NULL;
 501         TDB_DATA data;
 502
 503         if (mapping_db == NULL) {
 504                 const char *dbname = lp_parm_const_string(
 505                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 506
 507                 if (dbname == NULL) {
 508                         DEBUG(10, ("%s:sidmap not defined\n",
 509                                    SMBACL4_PARAM_TYPE_NAME));
 510                         return False;
 511                 }
 512
 513                 become_root();
 514                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 515                                      O_RDONLY, 0600);
 516                 unbecome_root();
 517
 518                 if (mapping_db == NULL) {
 519                         DEBUG(1, ("could not open sidmap: %s\n",
 520                                   strerror(errno)));
 521                         return False;
 522                 }
 523         }
 524
 525         if (mapping_db->fetch(mapping_db, NULL,
 526                               string_term_tdb_data(sid_string_tos(src)),
 527                               &data) == -1) {
 528                 DEBUG(10, ("could not find mapping for SID %s\n",
 529                            sid_string_dbg(src)));
 530                 return False;
 531         }
 532
 533         if ((data.dptr == NULL) || (data.dsize <= 0)
 534             || (data.dptr[data.dsize-1] != '\0')) {
 535                 DEBUG(5, ("invalid mapping for SID %s\n",
 536                           sid_string_dbg(src)));
 537                 TALLOC_FREE(data.dptr);
 538                 return False;
 539         }
 540
 541         if (!string_to_sid(dst, (char *)data.dptr)) {
 542                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 543                           (char *)data.dptr, sid_string_dbg(src)));
 544                 TALLOC_FREE(data.dptr);
 545                 return False;
 546         }
 547
 548         TALLOC_FREE(data.dptr);
 549
 550         return True;
 551 }
 552
 553 static bool smbacl4_fill_ace4(
 554         TALLOC_CTX *mem_ctx,
 555         const char *filename,
 556         smbacl4_vfs_params *params,
 557         uid_t ownerUID,
 558         gid_t ownerGID,
 559         const struct security_ace *ace_nt, /* input */
 560         SMB_ACE4PROP_T *ace_v4 /* output */
 561 )
 562 {
 563         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 564
 565         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 566         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 567         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 568         if (ace_nt->flags & SEC_ACE_FLAG_INHERITED_ACE) {
 569                 ace_v4->aceFlags |= SMB_ACE4_INHERITED_ACE;
 570         }
 571         ace_v4->aceMask = ace_nt->access_mask &
 572                 (SEC_STD_ALL | SEC_FILE_ALL);
 573
 574         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 575
 576         if (ace_v4->aceFlags!=ace_nt->flags)
 577                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 578                         ace_v4->aceFlags, ace_nt->flags));
 579
 580         if (ace_v4->aceMask!=ace_nt->access_mask)
 581                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 582                         ace_v4->aceMask, ace_nt->access_mask));
 583
 584         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 585                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 586                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 587         } else {
 588                 const char *dom, *name;
 589                 enum lsa_SidType type;
 590                 uid_t uid;
 591                 gid_t gid;
 592                 struct dom_sid sid;
 593
 594                 sid_copy(&sid, &ace_nt->trustee);
 595
 596                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 597
 598                         struct dom_sid mapped;
 599
 600                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 601                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 602                                           "unknown\n", filename, sid_string_dbg(&sid)));
 603                                 errno = EINVAL;
 604                                 return False;
 605                         }
 606
 607                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 608                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 609
 610                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 611                                         &name, &type)) {
 612                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 613                                           "mapped from %s is unknown\n",
 614                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 615                                 errno = EINVAL;
 616                                 return False;
 617                         }
 618
 619                         sid_copy(&sid, &mapped);
 620                 }
 621
 622                 if (type == SID_NAME_USER) {
 623                         if (!sid_to_uid(&sid, &uid)) {
 624                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 625                                           "convert %s to uid\n", filename,
 626                                           sid_string_dbg(&sid)));
 627                                 return False;
 628                         }
 629
 630                         if (params->mode==e_special && uid==ownerUID) {
 631                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 632                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 633                         } else {
 634                                 ace_v4->who.uid = uid;
 635                         }
 636                 } else { /* else group? - TODO check it... */
 637                         if (!sid_to_gid(&sid, &gid)) {
 638                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 639                                           "convert %s to gid\n", filename,
 640                                           sid_string_dbg(&sid)));
 641                                 return False;
 642                         }
 643
 644                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 645
 646                         if (params->mode==e_special && gid==ownerGID) {
 647                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 648                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 649                         } else {
 650                                 ace_v4->who.gid = gid;
 651                         }
 652                 }
 653         }
 654
 655         return True; /* OK */
 656 }
 657
 658 static int smbacl4_MergeIgnoreReject(
 659         enum smbacl4_acedup_enum acedup,
 660         SMB4ACL_T *theacl, /* may modify it */
 661         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 662         bool    *paddNewACE,
 663         int     i
 664 )
 665 {
 666         int     result = 0;
 667         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 668         if (ace4found)
 669         {
 670                 switch(acedup)
 671                 {
 672                 case e_merge: /* "merge" flags */
 673                         *paddNewACE = False;
 674                         ace4found->aceFlags |= ace->aceFlags;
 675                         ace4found->aceMask |= ace->aceMask;
 676                         break;
 677                 case e_ignore: /* leave out this record */
 678                         *paddNewACE = False;
 679                         break;
 680                 case e_reject: /* do an error */
 681                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 682                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 683                         result = -1;
 684                         break;
 685                 default:
 686                         break;
 687                 }
 688         }
 689         return result;
 690 }
 691
 692 static SMB4ACL_T *smbacl4_win2nfs4(
 693         const char *filename,
 694         const struct security_acl *dacl,
 695         smbacl4_vfs_params *pparams,
 696         uid_t ownerUID,
 697         gid_t ownerGID
 698 )
 699 {
 700         SMB4ACL_T *theacl;
 701         uint32  i;
 702         TALLOC_CTX *mem_ctx = talloc_tos();
 703
 704         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 705
 706         theacl = smb_create_smb4acl();
 707         if (theacl==NULL)
 708                 return NULL;
 709
 710         for(i=0; i<dacl->num_aces; i++) {
 711                 SMB_ACE4PROP_T  ace_v4;
 712                 bool    addNewACE = True;
 713
 714                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 715                                        ownerUID, ownerGID,
 716                                        dacl->aces + i, &ace_v4)) {
 717                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 718                                   filename,
 719                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 720                         continue;
 721                 }
 722
 723                 if (pparams->acedup!=e_dontcare) {
 724                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 725                                 &ace_v4, &addNewACE, i))
 726                                 return NULL;
 727                 }
 728
 729                 if (addNewACE)
 730                         smb_add_ace4(theacl, &ace_v4);
 731         }
 732
 733         return theacl;
 734 }
 735
 736 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 737         uint32 security_info_sent,
 738         const struct security_descriptor *psd,
 739         set_nfs4acl_native_fn_t set_nfs4_native)
 740 {
 741         smbacl4_vfs_params params;
 742         SMB4ACL_T *theacl = NULL;
 743         bool    result;
 744
 745         SMB_STRUCT_STAT sbuf;
 746         bool set_acl_as_root = false;
 747         uid_t newUID = (uid_t)-1;
 748         gid_t newGID = (gid_t)-1;
 749         int saved_errno;
 750
 751         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 752
 753         if ((security_info_sent & (SECINFO_DACL |
 754                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 755         {
 756                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 757                         security_info_sent));
 758                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 759         }
 760
 761         /* Special behaviours */
 762         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 763                 return NT_STATUS_NO_MEMORY;
 764
 765         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 766                 return map_nt_error_from_unix(errno);
 767
 768         if (params.do_chown) {
 769                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 770                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 771                 if (!NT_STATUS_IS_OK(status)) {
 772                         DEBUG(8, ("unpack_nt_owners failed"));
 773                         return status;
 774                 }
 775                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 776                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 777
 778                         status = try_chown(fsp, newUID, newGID);
 779                         if (!NT_STATUS_IS_OK(status)) {
 780                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 781                                          "%s.\n", fsp_str_dbg(fsp),
 782                                          (unsigned int)newUID,
 783                                          (unsigned int)newGID,
 784                                          nt_errstr(status)));
 785                                 return status;
 786                         }
 787
 788                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 789                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 790                                   (unsigned int)newGID));
 791                         if (smbacl4_GetFileOwner(fsp->conn,
 792                                                  fsp->fsp_name->base_name,
 793                                                  &sbuf))
 794                                 return map_nt_error_from_unix(errno);
 795
 796                         /* If we successfully chowned, we know we must
 797                          * be able to set the acl, so do it as root.
 798                          */
 799                         set_acl_as_root = true;
 800                 }
 801         }
 802
 803         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 804                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 805                 return NT_STATUS_OK;
 806         }
 807
 808         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 809                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 810         if (!theacl)
 811                 return map_nt_error_from_unix(errno);
 812
 813         smbacl4_dump_nfs4acl(10, theacl);
 814
 815         if (set_acl_as_root) {
 816                 become_root();
 817         }
 818         result = set_nfs4_native(fsp, theacl);
 819         saved_errno = errno;
 820         if (set_acl_as_root) {
 821                 unbecome_root();
 822         }
 823         if (result!=True) {
 824                 errno = saved_errno;
 825                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 826                 return map_nt_error_from_unix(errno);
 827         }
 828
 829         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 830         return NT_STATUS_OK;
 831 }