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