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