source3/modules/nfs4_acls.c

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