source3/modules/nfs4_acls.c

   1 /*
   2  * NFS4 ACL handling
   3  *
   4  * Copyright (C) Jim McDonough, 2006
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "smbd/smbd.h"
  22 #include "nfs4_acls.h"
  23 #include "librpc/gen_ndr/ndr_security.h"
  24 #include "../libcli/security/dom_sid.h"
  25 #include "../libcli/security/security.h"
  26 #include "include/dbwrap.h"
  27 #include "system/filesys.h"
  28 #include "passdb/lookup_sid.h"
  29 #include "util_tdb.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_ACLS
  33
  34 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  35
  36 extern const struct generic_mapping file_generic_mapping;
  37
  38 #define SMB_ACE4_INT_MAGIC 0x76F8A967
  39 typedef struct _SMB_ACE4_INT_T
  40 {
  41         uint32  magic;
  42         SMB_ACE4PROP_T  prop;
  43         void    *next;
  44 } SMB_ACE4_INT_T;
  45
  46 #define SMB_ACL4_INT_MAGIC 0x29A3E792
  47 typedef struct _SMB_ACL4_INT_T
  48 {
  49         uint32  magic;
  50         uint32  naces;
  51         SMB_ACE4_INT_T  *first;
  52         SMB_ACE4_INT_T  *last;
  53 } SMB_ACL4_INT_T;
  54
  55 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
  56 {
  57         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
  58         if (theacl==NULL)
  59         {
  60                 DEBUG(2, ("acl is NULL\n"));
  61                 errno = EINVAL;
  62                 return NULL;
  63         }
  64         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
  65         {
  66                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
  67                 errno = EINVAL;
  68                 return NULL;
  69         }
  70         return aclint;
  71 }
  72
  73 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
  74 {
  75         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
  76         if (ace==NULL)
  77         {
  78                 DEBUG(2, ("ace is NULL\n"));
  79                 errno = EINVAL;
  80                 return NULL;
  81         }
  82         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
  83         {
  84                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
  85                 errno = EINVAL;
  86                 return NULL;
  87         }
  88         return aceint;
  89 }
  90
  91 SMB4ACL_T *smb_create_smb4acl(void)
  92 {
  93         TALLOC_CTX *mem_ctx = talloc_tos();
  94         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
  95         if (theacl==NULL)
  96         {
  97                 DEBUG(0, ("TALLOC_SIZE failed\n"));
  98                 errno = ENOMEM;
  99                 return NULL;
 100         }
 101         theacl->magic = SMB_ACL4_INT_MAGIC;
 102         /* theacl->first, last = NULL not needed */
 103         return (SMB4ACL_T *)theacl;
 104 }
 105
 106 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
 107 {
 108         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 109         TALLOC_CTX *mem_ctx = talloc_tos();
 110         SMB_ACE4_INT_T *ace;
 111
 112         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
 113         if (ace==NULL)
 114         {
 115                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 116                 errno = ENOMEM;
 117                 return NULL;
 118         }
 119         ace->magic = SMB_ACE4_INT_MAGIC;
 120         /* ace->next = NULL not needed */
 121         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
 122
 123         if (aclint->first==NULL)
 124         {
 125                 aclint->first = ace;
 126                 aclint->last = ace;
 127         } else {
 128                 aclint->last->next = (void *)ace;
 129                 aclint->last = ace;
 130         }
 131         aclint->naces++;
 132
 133         return (SMB4ACE_T *)ace;
 134 }
 135
 136 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
 137 {
 138         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 139         if (aceint==NULL)
 140                 return NULL;
 141
 142         return &aceint->prop;
 143 }
 144
 145 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
 146 {
 147         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
 148         if (aceint==NULL)
 149                 return NULL;
 150
 151         return (SMB4ACE_T *)aceint->next;
 152 }
 153
 154 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
 155 {
 156         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 157         if (aclint==NULL)
 158                 return NULL;
 159
 160         return (SMB4ACE_T *)aclint->first;
 161 }
 162
 163 uint32 smb_get_naces(SMB4ACL_T *theacl)
 164 {
 165         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 166         if (aclint==NULL)
 167                 return 0;
 168
 169         return aclint->naces;
 170 }
 171
 172 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 173                                 const char *filename,
 174                                 SMB_STRUCT_STAT *psbuf)
 175 {
 176         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 177
 178         /* Get the stat struct for the owner info. */
 179         if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
 180         {
 181                 DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
 182                         strerror(errno)));
 183                 return -1;
 184         }
 185
 186         return 0;
 187 }
 188
 189 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 190 {
 191         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
 192
 193         if (fsp->fh->fd == -1) {
 194                 return smbacl4_GetFileOwner(fsp->conn,
 195                                             fsp->fsp_name->base_name, psbuf);
 196         }
 197         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 198         {
 199                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 200                         strerror(errno)));
 201                 return -1;
 202         }
 203
 204         return 0;
 205 }
 206
 207 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
 208         struct dom_sid *psid_owner, /* in */
 209         struct dom_sid *psid_group, /* in */
 210         bool is_directory, /* in */
 211         struct security_ace **ppnt_ace_list, /* out */
 212         int *pgood_aces /* out */
 213 )
 214 {
 215         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
 216         SMB_ACE4_INT_T *aceint;
 217         struct security_ace *nt_ace_list = NULL;
 218         int good_aces = 0;
 219
 220         DEBUG(10, ("smbacl_nfs42win entered\n"));
 221
 222         aclint = get_validated_aclint(theacl);
 223         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
 224         /* in smb_get_nt_acl_nfs4(). */
 225         nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
 226         if (nt_ace_list==NULL)
 227         {
 228                 DEBUG(10, ("talloc error"));
 229                 errno = ENOMEM;
 230                 return False;
 231         }
 232
 233         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 234                 uint32_t mask;
 235                 struct dom_sid sid;
 236                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 237                 uint32_t mapped_ace_flags;
 238
 239                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
 240                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
 241                         ace->aceFlags, ace->aceMask, ace->who.id));
 242
 243                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
 244
 245                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 246                         switch (ace->who.special_id) {
 247                         case SMB_ACE4_WHO_OWNER:
 248                                 sid_copy(&sid, psid_owner);
 249                                 break;
 250                         case SMB_ACE4_WHO_GROUP:
 251                                 sid_copy(&sid, psid_group);
 252                                 break;
 253                         case SMB_ACE4_WHO_EVERYONE:
 254                                 sid_copy(&sid, &global_sid_World);
 255                                 break;
 256                         default:
 257                                 DEBUG(8, ("invalid special who id %d "
 258                                         "ignored\n", ace->who.special_id));
 259                         }
 260                 } else {
 261                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 262                                 gid_to_sid(&sid, ace->who.gid);
 263                         } else {
 264                                 uid_to_sid(&sid, ace->who.uid);
 265                         }
 266                 }
 267                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 268                            sid_string_dbg(&sid)));
 269
 270                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
 271                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 272                 }
 273
 274                 mapped_ace_flags = ace->aceFlags & 0xf;
 275                 if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
 276                         /*
 277                          * GPFS sets inherits dir_inhert and file_inherit flags
 278                          * to files, too, which confuses windows, and seems to
 279                          * be wrong anyways. ==> Map these bits away for files.
 280                          */
 281                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 282                         mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
 283                 }
 284                 DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
 285                       ace->aceFlags, mapped_ace_flags));
 286
 287                 /* Windows clients expect SYNC on acls to
 288                    correctly allow rename. See bug #7909. */
 289                 mask = ace->aceMask | SMB_ACE4_SYNCHRONIZE;
 290                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 291                         ace->aceType, mask,
 292                         mapped_ace_flags);
 293         }
 294
 295         *ppnt_ace_list = nt_ace_list;
 296         *pgood_aces = good_aces;
 297
 298         return True;
 299 }
 300
 301 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 302         uint32 security_info,
 303         struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 304 {
 305         int     good_aces = 0;
 306         struct dom_sid sid_owner, sid_group;
 307         size_t sd_size = 0;
 308         struct security_ace *nt_ace_list = NULL;
 309         struct security_acl *psa = NULL;
 310         TALLOC_CTX *mem_ctx = talloc_tos();
 311
 312         if (theacl==NULL || smb_get_naces(theacl)==0)
 313                 return NT_STATUS_ACCESS_DENIED; /* special because we
 314                                                  * shouldn't alloc 0 for
 315                                                  * win */
 316
 317         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 318         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 319
 320         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
 321                              S_ISDIR(sbuf->st_ex_mode),
 322                                 &nt_ace_list, &good_aces)==False) {
 323                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 324                 return map_nt_error_from_unix(errno);
 325         }
 326
 327         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
 328         if (psa == NULL) {
 329                 DEBUG(2,("make_sec_acl failed\n"));
 330                 return NT_STATUS_NO_MEMORY;
 331         }
 332
 333         DEBUG(10,("after make sec_acl\n"));
 334         *ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 335                                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 336                                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 337                                 NULL, psa, &sd_size);
 338         if (*ppdesc==NULL) {
 339                 DEBUG(2,("make_sec_desc failed\n"));
 340                 return NT_STATUS_NO_MEMORY;
 341         }
 342
 343         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
 344                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 345
 346         return NT_STATUS_OK;
 347 }
 348
 349 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 350                                uint32 security_info,
 351                                struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 352 {
 353         SMB_STRUCT_STAT sbuf;
 354
 355         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 356
 357         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 358                 return map_nt_error_from_unix(errno);
 359         }
 360
 361         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 362 }
 363
 364 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 365                               const char *name,
 366                               uint32 security_info,
 367                               struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
 368 {
 369         SMB_STRUCT_STAT sbuf;
 370
 371         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
 372
 373         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
 374                 return map_nt_error_from_unix(errno);
 375         }
 376
 377         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
 378 }
 379
 380 enum smbacl4_mode_enum {e_simple=0, e_special=1};
 381 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
 382
 383 typedef struct _smbacl4_vfs_params {
 384         enum smbacl4_mode_enum mode;
 385         bool do_chown;
 386         enum smbacl4_acedup_enum acedup;
 387         struct db_context *sid_mapping_table;
 388 } smbacl4_vfs_params;
 389
 390 /*
 391  * Gather special parameters for NFS4 ACL handling
 392  */
 393 static int smbacl4_get_vfs_params(
 394         const char *type_name,
 395         files_struct *fsp,
 396         smbacl4_vfs_params *params
 397 )
 398 {
 399         static const struct enum_list enum_smbacl4_modes[] = {
 400                 { e_simple, "simple" },
 401                 { e_special, "special" },
 402                 { -1 , NULL }
 403         };
 404         static const struct enum_list enum_smbacl4_acedups[] = {
 405                 { e_dontcare, "dontcare" },
 406                 { e_reject, "reject" },
 407                 { e_ignore, "ignore" },
 408                 { e_merge, "merge" },
 409                 { -1 , NULL }
 410         };
 411
 412         memset(params, 0, sizeof(smbacl4_vfs_params));
 413         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
 414                 SNUM(fsp->conn), type_name,
 415                 "mode", enum_smbacl4_modes, e_simple);
 416         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
 417                 "chown", True);
 418         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
 419                 SNUM(fsp->conn), type_name,
 420                 "acedup", enum_smbacl4_acedups, e_dontcare);
 421
 422         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
 423                 enum_smbacl4_modes[params->mode].name,
 424                 params->do_chown ? "true" : "false",
 425                 enum_smbacl4_acedups[params->acedup].name));
 426
 427         return 0;
 428 }
 429
 430 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
 431 {
 432         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 433         SMB_ACE4_INT_T *aceint;
 434
 435         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
 436
 437         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 438                 SMB_ACE4PROP_T *ace = &aceint->prop;
 439
 440                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
 441                         ace->aceType,
 442                         ace->aceFlags, ace->flags,
 443                         ace->aceMask,
 444                         ace->who.id));
 445         }
 446 }
 447
 448 /*
 449  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 450  * match nonzero if "special" and who is equal
 451  * return ace if found matching; otherwise NULL
 452  */
 453 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 454         SMB4ACL_T *theacl,
 455         SMB_ACE4PROP_T *aceNew)
 456 {
 457         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
 458         SMB_ACE4_INT_T *aceint;
 459
 460         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
 461                 SMB_ACE4PROP_T *ace = &aceint->prop;
 462
 463                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 464                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 465                           ace->aceType, ace->flags, ace->aceFlags,
 466                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 467
 468                 if (ace->flags == aceNew->flags &&
 469                         ace->aceType==aceNew->aceType &&
 470                         ((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
 471                          (aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
 472                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
 473                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
 474                 ) {
 475                         /* keep type safety; e.g. gid is an u.short */
 476                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 477                         {
 478                                 if (ace->who.special_id==aceNew->who.special_id)
 479                                         return ace;
 480                         } else {
 481                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 482                                 {
 483                                         if (ace->who.gid==aceNew->who.gid)
 484                                                 return ace;
 485                                 } else {
 486                                         if (ace->who.uid==aceNew->who.uid)
 487                                                 return ace;
 488                                 }
 489                         }
 490                 }
 491         }
 492
 493         return NULL;
 494 }
 495
 496 static bool nfs4_map_sid(smbacl4_vfs_params *params, const struct dom_sid *src,
 497                          struct dom_sid *dst)
 498 {
 499         static struct db_context *mapping_db = NULL;
 500         TDB_DATA data;
 501
 502         if (mapping_db == NULL) {
 503                 const char *dbname = lp_parm_const_string(
 504                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
 505
 506                 if (dbname == NULL) {
 507                         DEBUG(10, ("%s:sidmap not defined\n",
 508                                    SMBACL4_PARAM_TYPE_NAME));
 509                         return False;
 510                 }
 511
 512                 become_root();
 513                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
 514                                      O_RDONLY, 0600);
 515                 unbecome_root();
 516
 517                 if (mapping_db == NULL) {
 518                         DEBUG(1, ("could not open sidmap: %s\n",
 519                                   strerror(errno)));
 520                         return False;
 521                 }
 522         }
 523
 524         if (mapping_db->fetch(mapping_db, NULL,
 525                               string_term_tdb_data(sid_string_tos(src)),
 526                               &data) == -1) {
 527                 DEBUG(10, ("could not find mapping for SID %s\n",
 528                            sid_string_dbg(src)));
 529                 return False;
 530         }
 531
 532         if ((data.dptr == NULL) || (data.dsize <= 0)
 533             || (data.dptr[data.dsize-1] != '\0')) {
 534                 DEBUG(5, ("invalid mapping for SID %s\n",
 535                           sid_string_dbg(src)));
 536                 TALLOC_FREE(data.dptr);
 537                 return False;
 538         }
 539
 540         if (!string_to_sid(dst, (char *)data.dptr)) {
 541                 DEBUG(1, ("invalid mapping %s for SID %s\n",
 542                           (char *)data.dptr, sid_string_dbg(src)));
 543                 TALLOC_FREE(data.dptr);
 544                 return False;
 545         }
 546
 547         TALLOC_FREE(data.dptr);
 548
 549         return True;
 550 }
 551
 552 static bool smbacl4_fill_ace4(
 553         TALLOC_CTX *mem_ctx,
 554         const char *filename,
 555         smbacl4_vfs_params *params,
 556         uid_t ownerUID,
 557         gid_t ownerGID,
 558         const struct security_ace *ace_nt, /* input */
 559         SMB_ACE4PROP_T *ace_v4 /* output */
 560 )
 561 {
 562         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
 563
 564         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
 565         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
 566         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
 567         ace_v4->aceMask = ace_nt->access_mask &
 568                 (SEC_STD_ALL | SEC_FILE_ALL);
 569
 570         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
 571
 572         if (ace_v4->aceFlags!=ace_nt->flags)
 573                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
 574                         ace_v4->aceFlags, ace_nt->flags));
 575
 576         if (ace_v4->aceMask!=ace_nt->access_mask)
 577                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
 578                         ace_v4->aceMask, ace_nt->access_mask));
 579
 580         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 581                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
 582                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 583         } else {
 584                 const char *dom, *name;
 585                 enum lsa_SidType type;
 586                 uid_t uid;
 587                 gid_t gid;
 588                 struct dom_sid sid;
 589
 590                 sid_copy(&sid, &ace_nt->trustee);
 591
 592                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
 593
 594                         struct dom_sid mapped;
 595
 596                         if (!nfs4_map_sid(params, &sid, &mapped)) {
 597                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 598                                           "unknown\n", filename, sid_string_dbg(&sid)));
 599                                 errno = EINVAL;
 600                                 return False;
 601                         }
 602
 603                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
 604                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
 605
 606                         if (!lookup_sid(mem_ctx, &mapped, &dom,
 607                                         &name, &type)) {
 608                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
 609                                           "mapped from %s is unknown\n",
 610                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
 611                                 errno = EINVAL;
 612                                 return False;
 613                         }
 614
 615                         sid_copy(&sid, &mapped);
 616                 }
 617
 618                 if (type == SID_NAME_USER) {
 619                         if (!sid_to_uid(&sid, &uid)) {
 620                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 621                                           "convert %s to uid\n", filename,
 622                                           sid_string_dbg(&sid)));
 623                                 return False;
 624                         }
 625
 626                         if (params->mode==e_special && uid==ownerUID) {
 627                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 628                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
 629                         } else {
 630                                 ace_v4->who.uid = uid;
 631                         }
 632                 } else { /* else group? - TODO check it... */
 633                         if (!sid_to_gid(&sid, &gid)) {
 634                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
 635                                           "convert %s to gid\n", filename,
 636                                           sid_string_dbg(&sid)));
 637                                 return False;
 638                         }
 639
 640                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 641
 642                         if (params->mode==e_special && gid==ownerGID) {
 643                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
 644                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
 645                         } else {
 646                                 ace_v4->who.gid = gid;
 647                         }
 648                 }
 649         }
 650
 651         return True; /* OK */
 652 }
 653
 654 static int smbacl4_MergeIgnoreReject(
 655         enum smbacl4_acedup_enum acedup,
 656         SMB4ACL_T *theacl, /* may modify it */
 657         SMB_ACE4PROP_T *ace, /* the "new" ACE */
 658         bool    *paddNewACE,
 659         int     i
 660 )
 661 {
 662         int     result = 0;
 663         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
 664         if (ace4found)
 665         {
 666                 switch(acedup)
 667                 {
 668                 case e_merge: /* "merge" flags */
 669                         *paddNewACE = False;
 670                         ace4found->aceFlags |= ace->aceFlags;
 671                         ace4found->aceMask |= ace->aceMask;
 672                         break;
 673                 case e_ignore: /* leave out this record */
 674                         *paddNewACE = False;
 675                         break;
 676                 case e_reject: /* do an error */
 677                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
 678                         errno = EINVAL; /* SHOULD be set on any _real_ error */
 679                         result = -1;
 680                         break;
 681                 default:
 682                         break;
 683                 }
 684         }
 685         return result;
 686 }
 687
 688 static SMB4ACL_T *smbacl4_win2nfs4(
 689         const char *filename,
 690         const struct security_acl *dacl,
 691         smbacl4_vfs_params *pparams,
 692         uid_t ownerUID,
 693         gid_t ownerGID
 694 )
 695 {
 696         SMB4ACL_T *theacl;
 697         uint32  i;
 698         TALLOC_CTX *mem_ctx = talloc_tos();
 699
 700         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 701
 702         theacl = smb_create_smb4acl();
 703         if (theacl==NULL)
 704                 return NULL;
 705
 706         for(i=0; i<dacl->num_aces; i++) {
 707                 SMB_ACE4PROP_T  ace_v4;
 708                 bool    addNewACE = True;
 709
 710                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
 711                                        ownerUID, ownerGID,
 712                                        dacl->aces + i, &ace_v4)) {
 713                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
 714                                   filename,
 715                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
 716                         continue;
 717                 }
 718
 719                 if (pparams->acedup!=e_dontcare) {
 720                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
 721                                 &ace_v4, &addNewACE, i))
 722                                 return NULL;
 723                 }
 724
 725                 if (addNewACE)
 726                         smb_add_ace4(theacl, &ace_v4);
 727         }
 728
 729         return theacl;
 730 }
 731
 732 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
 733         uint32 security_info_sent,
 734         const struct security_descriptor *psd,
 735         set_nfs4acl_native_fn_t set_nfs4_native)
 736 {
 737         smbacl4_vfs_params params;
 738         SMB4ACL_T *theacl = NULL;
 739         bool    result;
 740
 741         SMB_STRUCT_STAT sbuf;
 742         bool set_acl_as_root = false;
 743         uid_t newUID = (uid_t)-1;
 744         gid_t newGID = (gid_t)-1;
 745         int saved_errno;
 746
 747         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 748
 749         if ((security_info_sent & (SECINFO_DACL |
 750                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 751         {
 752                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 753                         security_info_sent));
 754                 return NT_STATUS_OK; /* won't show error - later to be refined... */
 755         }
 756
 757         /* Special behaviours */
 758         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
 759                 return NT_STATUS_NO_MEMORY;
 760
 761         if (smbacl4_fGetFileOwner(fsp, &sbuf))
 762                 return map_nt_error_from_unix(errno);
 763
 764         if (params.do_chown) {
 765                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 766                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
 767                 if (!NT_STATUS_IS_OK(status)) {
 768                         DEBUG(8, ("unpack_nt_owners failed"));
 769                         return status;
 770                 }
 771                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 772                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 773
 774                         status = try_chown(fsp, newUID, newGID);
 775                         if (!NT_STATUS_IS_OK(status)) {
 776                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 777                                          "%s.\n", fsp_str_dbg(fsp),
 778                                          (unsigned int)newUID,
 779                                          (unsigned int)newGID,
 780                                          nt_errstr(status)));
 781                                 return status;
 782                         }
 783
 784                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 785                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 786                                   (unsigned int)newGID));
 787                         if (smbacl4_GetFileOwner(fsp->conn,
 788                                                  fsp->fsp_name->base_name,
 789                                                  &sbuf))
 790                                 return map_nt_error_from_unix(errno);
 791
 792                         /* If we successfully chowned, we know we must
 793                          * be able to set the acl, so do it as root.
 794                          */
 795                         set_acl_as_root = true;
 796                 }
 797         }
 798
 799         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
 800                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
 801                 return NT_STATUS_OK;
 802         }
 803
 804         theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, &params,
 805                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
 806         if (!theacl)
 807                 return map_nt_error_from_unix(errno);
 808
 809         smbacl4_dump_nfs4acl(10, theacl);
 810
 811         if (set_acl_as_root) {
 812                 become_root();
 813         }
 814         result = set_nfs4_native(fsp, theacl);
 815         saved_errno = errno;
 816         if (set_acl_as_root) {
 817                 unbecome_root();
 818         }
 819         if (result!=True) {
 820                 errno = saved_errno;
 821                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
 822                 return map_nt_error_from_unix(errno);
 823         }
 824
 825         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
 826         return NT_STATUS_OK;
 827 }