source/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 extern struct current_user current_user;
  48 extern int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid);
  49 extern NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp,
  50         uint32 security_info_sent, SEC_DESC *psd);
  51
  52 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *acl)
  53 {
  54         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
  55         if (acl==NULL)
  56         {
  57                 DEBUG(2, ("acl is NULL\n"));
  58                 errno = EINVAL;
  59                 return NULL;
  60         }
  61         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  62         {
  63                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  64                 errno = EINVAL;
  65                 return NULL;
  66         }
  67         return aclint;
  68 }
  69
  70 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  71 {
  72         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  73         if (ace==NULL)
  74         {
  75                 DEBUG(2, ("ace is NULL\n"));
  76                 errno = EINVAL;
  77                 return NULL;
  78         }
  79         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  80         {
  81                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  82                 errno = EINVAL;
  83                 return NULL;
  84         }
  85         return aceint;
  86 }
  87
  88 SMB4ACL_T *smb_create_smb4acl(void)
  89 {
  90         TALLOC_CTX *mem_ctx = talloc_tos();
  91         SMB_ACL4_INT_T  *acl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  92         if (acl==NULL)
  93         {
  94                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  95                 errno = ENOMEM;
  96                 return NULL;
  97         }
  98         acl->magic = SMB_ACL4_INT_MAGIC;
  99         /* acl->first, last = NULL not needed */
 100         return (SMB4ACL_T *)acl;
 101 }
 102
 103 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
 104 {
 105         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 106         TALLOC_CTX *mem_ctx = talloc_tos();
 107         SMB_ACE4_INT_T *ace;
 108
 109         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 110         if (ace==NULL)
 111         {
 112                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 113                 errno = ENOMEM;
 114                 return NULL;
 115         }
 116         ace->magic = SMB_ACE4_INT_MAGIC;
 117         /* ace->next = NULL not needed */
 118         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 119
 120         if (aclint->first==NULL)
 121         {
 122                 aclint->first = ace;
 123                 aclint->last = ace;
 124         } else {
 125                 aclint->last->next = (void *)ace;
 126                 aclint->last = ace;
 127         }
 128         aclint->naces++;
 129
 130         return (SMB4ACE_T *)ace;
 131 }
 132
 133 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 134 {
 135         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 136         if (aceint==NULL)
 137                 return NULL;
 138
 139         return &aceint->prop;
 140 }
 141
 142 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 143 {
 144         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 145         if (aceint==NULL)
 146                 return NULL;
 147
 148         return (SMB4ACE_T *)aceint->next;
 149 }
 150
 151 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *acl)
 152 {
 153         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 154         if (aclint==NULL)
 155                 return NULL;
 156
 157         return (SMB4ACE_T *)aclint->first;
 158 }
 159
 160 uint32 smb_get_naces(SMB4ACL_T *acl)
 161 {
 162         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 163         if (aclint==NULL)
 164                 return 0;
 165
 166         return aclint->naces;
 167 }
 168
 169 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 170                                 const char *filename,
 171                                 SMB_STRUCT_STAT *psbuf)
 172 {
 173         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 174
 175         /* Get the stat struct for the owner info. */
 176         if (SMB_VFS_STAT(conn, filename, psbuf) != 0)
 177         {
 178                 DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
 179                         strerror(errno)));
 180                 return -1;
 181         }
 182
 183         return 0;
 184 }
 185
 186 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 187 {
 188         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 189
 190         if (fsp->is_directory || fsp->fh->fd == -1) {
 191                 return smbacl4_GetFileOwner(fsp->conn, fsp->fsp_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 *acl, /* in */
 204         DOM_SID *psid_owner, /* in */
 205         DOM_SID *psid_group, /* in */
 206         bool is_directory, /* in */
 207         SEC_ACE **ppnt_ace_list, /* out */
 208         int *pgood_aces /* out */
 209 )
 210 {
 211         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
 212         SMB_ACE4_INT_T *aceint;
 213         SEC_ACE *nt_ace_list = NULL;
 214         int good_aces = 0;
 215
 216         DEBUG(10, ("smbacl_nfs42win entered"));
 217
 218         aclint = get_validated_aclint(acl);
 219         /* We do not check for naces being 0 or acl being NULL here because it is done upstream */
 220         /* in smb_get_nt_acl_nfs4(). */
 221         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_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                 SEC_ACCESS mask;
 231                 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                 init_sec_access(&mask, ace->aceMask);
 284                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 285                         ace->aceType, mask,
 286                         mapped_ace_flags);
 287         }
 288
 289         *ppnt_ace_list = nt_ace_list;
 290         *pgood_aces = good_aces;
 291
 292         return True;
 293 }
 294
 295 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 296         uint32 security_info,
 297         SEC_DESC **ppdesc, SMB4ACL_T *acl)
 298 {
 299         int     good_aces = 0;
 300         DOM_SID sid_owner, sid_group;
 301         size_t sd_size = 0;
 302         SEC_ACE *nt_ace_list = NULL;
 303         SEC_ACL *psa = NULL;
 304         TALLOC_CTX *mem_ctx = talloc_tos();
 305
 306         if (acl==NULL || smb_get_naces(acl)==0)
 307                 return NT_STATUS_ACCESS_DENIED; /* special because we
 308                                                  * shouldn't alloc 0 for
 309                                                  * win */
 310
 311         uid_to_sid(&sid_owner, sbuf->st_uid);
 312         gid_to_sid(&sid_group, sbuf->st_gid);
 313
 314         if (smbacl4_nfs42win(mem_ctx, acl, &sid_owner, &sid_group, S_ISDIR(sbuf->st_mode),
 315                                 &nt_ace_list, &good_aces)==False) {
 316                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 317                 return map_nt_error_from_unix(errno);
 318         }
 319
 320         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 321         if (psa == NULL) {
 322                 DEBUG(2,("make_sec_acl failed\n"));
 323                 return NT_STATUS_NO_MEMORY;
 324         }
 325
 326         DEBUG(10,("after make sec_acl\n"));
 327         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
 328                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
 329                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
 330                                 NULL, psa, &sd_size);
 331         if (*ppdesc==NULL) {
 332                 DEBUG(2,("make_sec_desc failed\n"));
 333                 return NT_STATUS_NO_MEMORY;
 334         }
 335
 336         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 337                    ndr_size_security_descriptor(*ppdesc, 0)));
 338
 339         return NT_STATUS_OK;
 340 }
 341
 342 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 343                                uint32 security_info,
 344                                SEC_DESC **ppdesc, SMB4ACL_T *acl)
 345 {
 346         SMB_STRUCT_STAT sbuf;
 347
 348         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 349
 350         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 351                 return map_nt_error_from_unix(errno);
 352         }
 353
 354         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
 355 }
 356
 357 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 358                               const char *name,
 359                               uint32 security_info,
 360                               SEC_DESC **ppdesc, SMB4ACL_T *acl)
 361 {
 362         SMB_STRUCT_STAT sbuf;
 363
 364         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 365
 366         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 367                 return map_nt_error_from_unix(errno);
 368         }
 369
 370         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
 371 }
 372
 373 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 374 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 375
 376 typedef struct _smbacl4_vfs_params {
 377         enum smbacl4_mode_enum mode;
 378         bool do_chown;
 379         enum smbacl4_acedup_enum acedup;
 380         struct db_context *sid_mapping_table;
 381 } smbacl4_vfs_params;
 382
 383 /*
 384  * Gather special parameters for NFS4 ACL handling
 385  */
 386 static int smbacl4_get_vfs_params(
 387         const char *type_name,
 388         files_struct *fsp,
 389         smbacl4_vfs_params *params
 390 )
 391 {
 392         static const struct enum_list enum_smbacl4_modes[] = {
 393                 { e_simple, "simple" },
 394                 { e_special, "special" }
 395         };
 396         static const struct enum_list enum_smbacl4_acedups[] = {
 397                 { e_dontcare, "dontcare" },
 398                 { e_reject, "reject" },
 399                 { e_ignore, "ignore" },
 400                 { e_merge, "merge" },
 401         };
 402
 403         memset(params, 0, sizeof(smbacl4_vfs_params));
 404         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 405                 SNUM(fsp->conn), type_name,
 406                 "mode", enum_smbacl4_modes, e_simple);
 407         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 408                 "chown", True);
 409         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 410                 SNUM(fsp->conn), type_name,
 411                 "acedup", enum_smbacl4_acedups, e_dontcare);
 412
 413         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 414                 enum_smbacl4_modes[params->mode].name,
 415                 params->do_chown ? "true" : "false",
 416                 enum_smbacl4_acedups[params->acedup].name));
 417
 418         return 0;
 419 }
 420
 421 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *acl)
 422 {
 423         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 424         SMB_ACE4_INT_T *aceint;
 425
 426         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 427
 428         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 429                 SMB_ACE4PROP_T *ace = &aceint->prop;
 430
 431                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 432                         ace->aceType,
 433                         ace->aceFlags, ace->flags,
 434                         ace->aceMask,
 435                         ace->who.id));
 436         }
 437 }
 438
 439 /*
 440  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 441  * match nonzero if "special" and who is equal
 442  * return ace if found matching; otherwise NULL
 443  */
 444 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 445         SMB4ACL_T *acl,
 446         SMB_ACE4PROP_T *aceNew)
 447 {
 448         SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
 449         SMB_ACE4_INT_T *aceint;
 450
 451         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 452                 SMB_ACE4PROP_T *ace = &aceint->prop;
 453
 454                 if (ace->flags == aceNew->flags &&
 455                         ace->aceType==aceNew->aceType &&
 456                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 457                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 458                 ) {
 459                         /* keep type safety; e.g. gid is an u.short */
 460                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 461                         {
 462                                 if (ace->who.special_id==aceNew->who.special_id)
 463                                         return ace;
 464                         } else {
 465                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 466                                 {
 467                                         if (ace->who.gid==aceNew->who.gid)
 468                                                 return ace;
 469                                 } else {
 470                                         if (ace->who.uid==aceNew->who.uid)
 471                                                 return ace;
 472                                 }
 473                         }
 474                 }
 475         }
 476
 477         return NULL;
 478 }
 479
 480 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
 481                          DOM_SID *dst)
 482 {
 483         static struct db_context *mapping_db = NULL;
 484         TDB_DATA data;
 485
 486         if (mapping_db == NULL) {
 487                 const char *dbname = lp_parm_const_string(
 488                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 489
 490                 if (dbname == NULL) {
 491                         DEBUG(10, ("%s:sidmap not defined\n",
 492                                    SMBACL4_PARAM_TYPE_NAME));
 493                         return False;
 494                 }
 495
 496                 become_root();
 497                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 498                                      O_RDONLY, 0600);
 499                 unbecome_root();
 500
 501                 if (mapping_db == NULL) {
 502                         DEBUG(1, ("could not open sidmap: %s\n",
 503                                   strerror(errno)));
 504                         return False;
 505                 }
 506         }
 507
 508         if (mapping_db->fetch(mapping_db, NULL,
 509                               string_term_tdb_data(sid_string_tos(src)),
 510                               &data) == -1) {
 511                 DEBUG(10, ("could not find mapping for SID %s\n",
 512                            sid_string_dbg(src)));
 513                 return False;
 514         }
 515
 516         if ((data.dptr == NULL) || (data.dsize <= 0)
 517             || (data.dptr[data.dsize-1] != '\0')) {
 518                 DEBUG(5, ("invalid mapping for SID %s\n",
 519                           sid_string_dbg(src)));
 520                 TALLOC_FREE(data.dptr);
 521                 return False;
 522         }
 523
 524         if (!string_to_sid(dst, (char *)data.dptr)) {
 525                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 526                           (char *)data.dptr, sid_string_dbg(src)));
 527                 TALLOC_FREE(data.dptr);
 528                 return False;
 529         }
 530
 531         TALLOC_FREE(data.dptr);
 532
 533         return True;
 534 }
 535
 536 static bool smbacl4_fill_ace4(
 537         TALLOC_CTX *mem_ctx,
 538         const char *filename,
 539         smbacl4_vfs_params *params,
 540         uid_t ownerUID,
 541         gid_t ownerGID,
 542         SEC_ACE *ace_nt, /* input */
 543         SMB_ACE4PROP_T *ace_v4 /* output */
 544 )
 545 {
 546         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 547
 548         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 549         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 550         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 551         ace_v4->aceMask = ace_nt->access_mask &
 552                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 553
 554 //      se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 555
 556         if (ace_v4->aceFlags!=ace_nt->flags)
 557                 DEBUG(9, ("FIXME: ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 558                         ace_v4->aceFlags, ace_nt->flags));
 559
 560         if (ace_v4->aceMask!=ace_nt->access_mask){
 561
 562                 uint32 access_mask = ace_v4->aceMask &
 563                         ~(STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
 564
 565                 /*
 566                  * Handling for generic access mask bits
 567                  *  Generic all access     = 0x1f01ff
 568                  *  Generic execute access = 0x1200a0
 569                  *  Generic write access:  = 0x1d0116
 570                  *  Generic read access    = 0x120089
 571                 */
 572                 if (ace_nt->access_mask & GENERIC_RIGHT_ALL_ACCESS) {
 573                         ace_v4->aceMask |= GENERIC_RIGHTS_FILE_ALL_ACCESS;
 574                 }
 575                 if (ace_nt->access_mask & GENERIC_RIGHT_EXECUTE_ACCESS) {
 576                         ace_v4->aceMask |= GENERIC_RIGHTS_FILE_EXECUTE;
 577                 }
 578                 if (ace_nt->access_mask & GENERIC_RIGHT_WRITE_ACCESS) {
 579                         ace_v4->aceMask |= GENERIC_RIGHTS_FILE_WRITE;
 580                 }
 581                 if (ace_nt->access_mask & GENERIC_RIGHT_READ_ACCESS) {
 582                         ace_v4->aceMask |= GENERIC_RIGHTS_FILE_READ;
 583                 }
 584
 585                 /*
 586                  * Are they still bits which needs to be translated ?
 587                  */
 588                 access_mask &= ~(GENERIC_RIGHT_ALL_ACCESS | GENERIC_RIGHT_EXECUTE_ACCESS |
 589                                 GENERIC_RIGHT_WRITE_ACCESS | GENERIC_RIGHT_READ_ACCESS);
 590
 591                 if (access_mask) {
 592                         DEBUG(9, ("FIXME: ace_nt->access_mask(0x%x), access_mask(0x%x)\n",
 593                                 ace_nt->access_mask, access_mask));
 594                 }
 595         }
 596
 597         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
 598                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 599                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 600         } else {
 601                 const char *dom, *name;
 602                 enum lsa_SidType type;
 603                 uid_t uid;
 604                 gid_t gid;
 605                 DOM_SID sid;
 606
 607                 sid_copy(&sid, &ace_nt->trustee);
 608
 609                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 610
 611                         DOM_SID mapped;
 612
 613                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 614                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 615                                           "unknown\n", filename, sid_string_dbg(&sid)));
 616                                 errno = EINVAL;
 617                                 return False;
 618                         }
 619
 620                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 621                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 622
 623                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 624                                         &name, &type)) {
 625                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 626                                           "mapped from %s is unknown\n",
 627                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 628                                 errno = EINVAL;
 629                                 return False;
 630                         }
 631
 632                         sid_copy(&sid, &mapped);
 633                 }
 634
 635                 if (type == SID_NAME_USER) {
 636                         if (!sid_to_uid(&sid, &uid)) {
 637                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 638                                           "convert %s to uid\n", filename,
 639                                           sid_string_dbg(&sid)));
 640                                 return False;
 641                         }
 642
 643                         if (params->mode==e_special && uid==ownerUID) {
 644                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 645                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 646                         } else {
 647                                 ace_v4->who.uid = uid;
 648                         }
 649                 } else { /* else group? - TODO check it... */
 650                         if (!sid_to_gid(&sid, &gid)) {
 651                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 652                                           "convert %s to gid\n", filename,
 653                                           sid_string_dbg(&sid)));
 654                                 return False;
 655                         }
 656
 657                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 658
 659                         if (params->mode==e_special && gid==ownerGID) {
 660                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 661                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 662                         } else {
 663                                 ace_v4->who.gid = gid;
 664                         }
 665                 }
 666         }
 667
 668         return True; /* OK */
 669 }
 670
 671 static int smbacl4_MergeIgnoreReject(
 672         enum smbacl4_acedup_enum acedup,
 673         SMB4ACL_T *acl, /* may modify it */
 674         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 675         bool    *paddNewACE,
 676         int     i
 677 )
 678 {
 679         int     result = 0;
 680         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(acl, ace);
 681         if (ace4found)
 682         {
 683                 switch(acedup)
 684                 {
 685                 case e_merge: /* "merge" flags */
 686                         *paddNewACE = False;
 687                         ace4found->aceFlags |= ace->aceFlags;
 688                         ace4found->aceMask |= ace->aceMask;
 689                         break;
 690                 case e_ignore: /* leave out this record */
 691                         *paddNewACE = False;
 692                         break;
 693                 case e_reject: /* do an error */
 694                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 695                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 696                         result = -1;
 697                         break;
 698                 default:
 699                         break;
 700                 }
 701         }
 702         return result;
 703 }
 704
 705 static SMB4ACL_T *smbacl4_win2nfs4(
 706         const char *filename,
 707         SEC_ACL *dacl,
 708         smbacl4_vfs_params *pparams,
 709         uid_t ownerUID,
 710         gid_t ownerGID
 711 )
 712 {
 713         SMB4ACL_T *acl;
 714         uint32  i;
 715         TALLOC_CTX *mem_ctx = talloc_tos();
 716
 717         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 718
 719         acl = smb_create_smb4acl();
 720         if (acl==NULL)
 721                 return NULL;
 722
 723         for(i=0; i<dacl->num_aces; i++) {
 724                 SMB_ACE4PROP_T  ace_v4;
 725                 bool    addNewACE = True;
 726
 727                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 728                                        ownerUID, ownerGID,
 729                                        dacl->aces + i, &ace_v4)) {
 730                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 731                                   filename,
 732                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 733                         continue;
 734                 }
 735
 736                 if (pparams->acedup!=e_dontcare) {
 737                         if (smbacl4_MergeIgnoreReject(pparams->acedup, acl,
 738                                 &ace_v4, &addNewACE, i))
 739                                 return NULL;
 740                 }
 741
 742                 if (addNewACE)
 743                         smb_add_ace4(acl, &ace_v4);
 744         }
 745
 746         return acl;
 747 }
 748
 749 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 750         uint32 security_info_sent,
 751         SEC_DESC *psd,
 752         set_nfs4acl_native_fn_t set_nfs4_native)
 753 {
 754         smbacl4_vfs_params params;
 755         SMB4ACL_T *acl = NULL;
 756         bool    result;
 757
 758         SMB_STRUCT_STAT sbuf;
 759         bool set_acl_as_root = false;
 760         uid_t newUID = (uid_t)-1;
 761         gid_t newGID = (gid_t)-1;
 762         int saved_errno;
 763
 764         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
 765
 766         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
 767                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
 768         {
 769                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 770                         security_info_sent));
 771                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 772         }
 773
 774         /* Special behaviours */
 775         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 776                 return NT_STATUS_NO_MEMORY;
 777
 778         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 779                 return map_nt_error_from_unix(errno);
 780
 781         if (params.do_chown) {
 782                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 783                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
 784                 if (!NT_STATUS_IS_OK(status)) {
 785                         DEBUG(8, ("unpack_nt_owners failed"));
 786                         return status;
 787                 }
 788                 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
 789                     ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
 790                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
 791                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
 792                                          fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
 793                                          strerror(errno)));
 794                                 return map_nt_error_from_unix(errno);
 795                         }
 796
 797                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 798                                   fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
 799                         if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
 800                                 return map_nt_error_from_unix(errno);
 801                         /* If we successfully chowned, we know we must
 802                          * be able to set the acl, so do it as root.
 803                          */
 804                         set_acl_as_root = true;
 805                 }
 806         }
 807
 808         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
 809                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 810                 return NT_STATUS_OK;
 811         }
 812
 813         acl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
 814         if (!acl)
 815                 return map_nt_error_from_unix(errno);
 816
 817         smbacl4_dump_nfs4acl(10, acl);
 818
 819         if (set_acl_as_root) {
 820                 become_root();
 821         }
 822         result = set_nfs4_native(fsp, acl);
 823         saved_errno = errno;
 824         if (set_acl_as_root) {
 825                 unbecome_root();
 826         }
 827         if (result!=True) {
 828                 errno = saved_errno;
 829                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 830                 return map_nt_error_from_unix(errno);
 831         }
 832
 833         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 834         return NT_STATUS_OK;
 835 }