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 "librpc/gen_ndr/idmap.h"
  25 #include "../libcli/security/dom_sid.h"
  26 #include "../libcli/security/security.h"
  27 #include "dbwrap/dbwrap.h"
  28 #include "dbwrap/dbwrap_open.h"
  29 #include "system/filesys.h"
  30 #include "passdb/lookup_sid.h"
  31 #include "util_tdb.h"
  32 #include "lib/param/loadparm.h"
  33
  34 #undef DBGC_CLASS
  35 #define DBGC_CLASS DBGC_ACLS
  36
  37 #define SMBACL4_PARAM_TYPE_NAME "nfs4"
  38
  39 extern const struct generic_mapping file_generic_mapping;
  40
  41 struct SMB4ACE_T
  42 {
  43         SMB_ACE4PROP_T  prop;
  44         struct SMB4ACE_T *next;
  45 };
  46
  47 struct SMB4ACL_T
  48 {
  49         uint16_t controlflags;
  50         uint32_t naces;
  51         struct SMB4ACE_T        *first;
  52         struct SMB4ACE_T        *last;
  53 };
  54
  55 /*
  56  * Gather special parameters for NFS4 ACL handling
  57  */
  58 int smbacl4_get_vfs_params(struct connection_struct *conn,
  59                            struct smbacl4_vfs_params *params)
  60 {
  61         static const struct enum_list enum_smbacl4_modes[] = {
  62                 { e_simple, "simple" },
  63                 { e_special, "special" },
  64                 { -1 , NULL }
  65         };
  66         static const struct enum_list enum_smbacl4_acedups[] = {
  67                 { e_dontcare, "dontcare" },
  68                 { e_reject, "reject" },
  69                 { e_ignore, "ignore" },
  70                 { e_merge, "merge" },
  71                 { -1 , NULL }
  72         };
  73         int enumval;
  74
  75         ZERO_STRUCTP(params);
  76
  77         enumval = lp_parm_enum(SNUM(conn), SMBACL4_PARAM_TYPE_NAME, "mode",
  78                                enum_smbacl4_modes, e_simple);
  79         if (enumval == -1) {
  80                 DEBUG(10, ("value for %s:mode unknown\n",
  81                            SMBACL4_PARAM_TYPE_NAME));
  82                 return -1;
  83         }
  84         params->mode = (enum smbacl4_mode_enum)enumval;
  85
  86         params->do_chown = lp_parm_bool(SNUM(conn), SMBACL4_PARAM_TYPE_NAME,
  87                 "chown", true);
  88
  89         enumval = lp_parm_enum(SNUM(conn), SMBACL4_PARAM_TYPE_NAME, "acedup",
  90                                enum_smbacl4_acedups, e_dontcare);
  91         if (enumval == -1) {
  92                 DEBUG(10, ("value for %s:acedup unknown\n",
  93                            SMBACL4_PARAM_TYPE_NAME));
  94                 return -1;
  95         }
  96         params->acedup = (enum smbacl4_acedup_enum)enumval;
  97
  98         params->map_full_control = lp_acl_map_full_control(SNUM(conn));
  99
 100         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s map full control:%s\n",
 101                 enum_smbacl4_modes[params->mode].name,
 102                 params->do_chown ? "true" : "false",
 103                 enum_smbacl4_acedups[params->acedup].name,
 104                 params->map_full_control ? "true" : "false"));
 105
 106         return 0;
 107 }
 108
 109 /************************************************
 110  Split the ACE flag mapping between nfs4 and Windows
 111  into two separate functions rather than trying to do
 112  it inline. Allows us to carefully control what flags
 113  are mapped to what in one place.
 114 ************************************************/
 115
 116 static uint32_t map_nfs4_ace_flags_to_windows_ace_flags(
 117         uint32_t nfs4_ace_flags)
 118 {
 119         uint32_t win_ace_flags = 0;
 120
 121         /* The nfs4 flags <= 0xf map perfectly. */
 122         win_ace_flags = nfs4_ace_flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
 123                                       SEC_ACE_FLAG_CONTAINER_INHERIT|
 124                                       SEC_ACE_FLAG_NO_PROPAGATE_INHERIT|
 125                                       SEC_ACE_FLAG_INHERIT_ONLY);
 126
 127         /* flags greater than 0xf have diverged :-(. */
 128         /* See the nfs4 ace flag definitions here:
 129            http://www.ietf.org/rfc/rfc3530.txt.
 130            And the Windows ace flag definitions here:
 131            librpc/idl/security.idl. */
 132         if (nfs4_ace_flags & SMB_ACE4_INHERITED_ACE) {
 133                 win_ace_flags |= SEC_ACE_FLAG_INHERITED_ACE;
 134         }
 135
 136         return win_ace_flags;
 137 }
 138
 139 static uint32_t map_windows_ace_flags_to_nfs4_ace_flags(uint32_t win_ace_flags)
 140 {
 141         uint32_t nfs4_ace_flags = 0;
 142
 143         /* The windows flags <= 0xf map perfectly. */
 144         nfs4_ace_flags = win_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|
 145                                       SMB_ACE4_DIRECTORY_INHERIT_ACE|
 146                                       SMB_ACE4_NO_PROPAGATE_INHERIT_ACE|
 147                                       SMB_ACE4_INHERIT_ONLY_ACE);
 148
 149         /* flags greater than 0xf have diverged :-(. */
 150         /* See the nfs4 ace flag definitions here:
 151            http://www.ietf.org/rfc/rfc3530.txt.
 152            And the Windows ace flag definitions here:
 153            librpc/idl/security.idl. */
 154         if (win_ace_flags & SEC_ACE_FLAG_INHERITED_ACE) {
 155                 nfs4_ace_flags |= SMB_ACE4_INHERITED_ACE;
 156         }
 157
 158         return nfs4_ace_flags;
 159 }
 160
 161 struct SMB4ACL_T *smb_create_smb4acl(TALLOC_CTX *mem_ctx)
 162 {
 163         struct SMB4ACL_T *theacl;
 164
 165         theacl = talloc_zero(mem_ctx, struct SMB4ACL_T);
 166         if (theacl==NULL)
 167         {
 168                 DEBUG(0, ("TALLOC_SIZE failed\n"));
 169                 errno = ENOMEM;
 170                 return NULL;
 171         }
 172         theacl->controlflags = SEC_DESC_SELF_RELATIVE;
 173         /* theacl->first, last = NULL not needed */
 174         return theacl;
 175 }
 176
 177 struct SMB4ACE_T *smb_add_ace4(struct SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
 178 {
 179         struct SMB4ACE_T *ace;
 180
 181         ace = talloc_zero(acl, struct SMB4ACE_T);
 182         if (ace==NULL)
 183         {
 184                 DBG_ERR("talloc_zero failed\n");
 185                 errno = ENOMEM;
 186                 return NULL;
 187         }
 188         ace->prop = *prop;
 189
 190         if (acl->first==NULL)
 191         {
 192                 acl->first = ace;
 193                 acl->last = ace;
 194         } else {
 195                 acl->last->next = ace;
 196                 acl->last = ace;
 197         }
 198         acl->naces++;
 199
 200         return ace;
 201 }
 202
 203 SMB_ACE4PROP_T *smb_get_ace4(struct SMB4ACE_T *ace)
 204 {
 205         if (ace == NULL) {
 206                 return NULL;
 207         }
 208
 209         return &ace->prop;
 210 }
 211
 212 struct SMB4ACE_T *smb_next_ace4(struct SMB4ACE_T *ace)
 213 {
 214         if (ace == NULL) {
 215                 return NULL;
 216         }
 217
 218         return ace->next;
 219 }
 220
 221 struct SMB4ACE_T *smb_first_ace4(struct SMB4ACL_T *acl)
 222 {
 223         if (acl == NULL) {
 224                 return NULL;
 225         }
 226
 227         return acl->first;
 228 }
 229
 230 uint32_t smb_get_naces(struct SMB4ACL_T *acl)
 231 {
 232         if (acl == NULL) {
 233                 return 0;
 234         }
 235
 236         return acl->naces;
 237 }
 238
 239 uint16_t smbacl4_get_controlflags(struct SMB4ACL_T *acl)
 240 {
 241         if (acl == NULL) {
 242                 return 0;
 243         }
 244
 245         return acl->controlflags;
 246 }
 247
 248 bool smbacl4_set_controlflags(struct SMB4ACL_T *acl, uint16_t controlflags)
 249 {
 250         if (acl == NULL) {
 251                 return false;
 252         }
 253
 254         acl->controlflags = controlflags;
 255         return true;
 256 }
 257
 258 bool nfs_ace_is_inherit(SMB_ACE4PROP_T *ace)
 259 {
 260         return ace->aceFlags & (SMB_ACE4_INHERIT_ONLY_ACE|
 261                                 SMB_ACE4_FILE_INHERIT_ACE|
 262                                 SMB_ACE4_DIRECTORY_INHERIT_ACE);
 263 }
 264
 265 static int smbacl4_GetFileOwner(struct connection_struct *conn,
 266                                 const struct smb_filename *smb_fname,
 267                                 SMB_STRUCT_STAT *psbuf)
 268 {
 269         ZERO_STRUCTP(psbuf);
 270
 271         /* Get the stat struct for the owner info. */
 272         if (vfs_stat_smb_basename(conn, smb_fname, psbuf) != 0)
 273         {
 274                 DEBUG(8, ("vfs_stat_smb_basename failed with error %s\n",
 275                         strerror(errno)));
 276                 return -1;
 277         }
 278
 279         return 0;
 280 }
 281
 282 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
 283 {
 284         ZERO_STRUCTP(psbuf);
 285
 286         if (fsp->fh->fd == -1) {
 287                 return smbacl4_GetFileOwner(fsp->conn,
 288                                             fsp->fsp_name, psbuf);
 289         }
 290         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
 291         {
 292                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
 293                         strerror(errno)));
 294                 return -1;
 295         }
 296
 297         return 0;
 298 }
 299
 300 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx,
 301         const struct smbacl4_vfs_params *params,
 302         struct SMB4ACL_T *acl, /* in */
 303         struct dom_sid *psid_owner, /* in */
 304         struct dom_sid *psid_group, /* in */
 305         bool is_directory, /* in */
 306         struct security_ace **ppnt_ace_list, /* out */
 307         int *pgood_aces /* out */
 308 )
 309 {
 310         struct SMB4ACE_T *aceint;
 311         struct security_ace *nt_ace_list = NULL;
 312         int good_aces = 0;
 313
 314         DEBUG(10, ("%s entered\n", __func__));
 315
 316         nt_ace_list = talloc_zero_array(mem_ctx, struct security_ace,
 317                                         2 * acl->naces);
 318         if (nt_ace_list==NULL)
 319         {
 320                 DEBUG(10, ("talloc error with %d aces", acl->naces));
 321                 errno = ENOMEM;
 322                 return false;
 323         }
 324
 325         for (aceint = acl->first; aceint != NULL; aceint = aceint->next) {
 326                 uint32_t mask;
 327                 struct dom_sid sid;
 328                 struct dom_sid_buf buf;
 329                 SMB_ACE4PROP_T  *ace = &aceint->prop;
 330                 uint32_t win_ace_flags;
 331
 332                 DEBUG(10, ("type: %d, iflags: %x, flags: %x, "
 333                            "mask: %x, who: %d\n",
 334                            ace->aceType, ace->flags,
 335                            ace->aceFlags, ace->aceMask, ace->who.id));
 336
 337                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
 338                         switch (ace->who.special_id) {
 339                         case SMB_ACE4_WHO_OWNER:
 340                                 sid_copy(&sid, psid_owner);
 341                                 break;
 342                         case SMB_ACE4_WHO_GROUP:
 343                                 sid_copy(&sid, psid_group);
 344                                 break;
 345                         case SMB_ACE4_WHO_EVERYONE:
 346                                 sid_copy(&sid, &global_sid_World);
 347                                 break;
 348                         default:
 349                                 DEBUG(8, ("invalid special who id %d "
 350                                         "ignored\n", ace->who.special_id));
 351                                 continue;
 352                         }
 353                 } else {
 354                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
 355                                 gid_to_sid(&sid, ace->who.gid);
 356                         } else {
 357                                 uid_to_sid(&sid, ace->who.uid);
 358                         }
 359                 }
 360                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
 361                            dom_sid_str_buf(&sid, &buf)));
 362
 363                 if (!is_directory && params->map_full_control) {
 364                         /*
 365                          * Do we have all access except DELETE_CHILD
 366                          * (not caring about the delete bit).
 367                          */
 368                         uint32_t test_mask = ((ace->aceMask|SMB_ACE4_DELETE|SMB_ACE4_DELETE_CHILD) &
 369                                                 SMB_ACE4_ALL_MASKS);
 370                         if (test_mask == SMB_ACE4_ALL_MASKS) {
 371                                 ace->aceMask |= SMB_ACE4_DELETE_CHILD;
 372                         }
 373                 }
 374
 375                 win_ace_flags = map_nfs4_ace_flags_to_windows_ace_flags(
 376                         ace->aceFlags);
 377                 if (!is_directory &&
 378                     (win_ace_flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
 379                                       SEC_ACE_FLAG_CONTAINER_INHERIT))) {
 380                         /*
 381                          * GPFS sets inherits dir_inhert and file_inherit flags
 382                          * to files, too, which confuses windows, and seems to
 383                          * be wrong anyways. ==> Map these bits away for files.
 384                          */
 385                         DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
 386                         win_ace_flags &= ~(SEC_ACE_FLAG_OBJECT_INHERIT|
 387                                            SEC_ACE_FLAG_CONTAINER_INHERIT);
 388                 }
 389                 DEBUG(10, ("Windows mapped ace flags: 0x%x => 0x%x\n",
 390                       ace->aceFlags, win_ace_flags));
 391
 392                 mask = ace->aceMask;
 393
 394                 /* Mapping of owner@ and group@ to creator owner and
 395                    creator group. Keep old behavior in mode special. */
 396                 if (params->mode != e_special &&
 397                     ace->flags & SMB_ACE4_ID_SPECIAL &&
 398                     (ace->who.special_id == SMB_ACE4_WHO_OWNER ||
 399                      ace->who.special_id == SMB_ACE4_WHO_GROUP)) {
 400                         DEBUG(10, ("Map special entry\n"));
 401                         if (!(win_ace_flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
 402                                 uint32_t win_ace_flags_current;
 403                                 DEBUG(10, ("Map current sid\n"));
 404                                 win_ace_flags_current = win_ace_flags &
 405                                         ~(SEC_ACE_FLAG_OBJECT_INHERIT |
 406                                           SEC_ACE_FLAG_CONTAINER_INHERIT);
 407                                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
 408                                              ace->aceType, mask,
 409                                              win_ace_flags_current);
 410                         }
 411                         if (ace->who.special_id == SMB_ACE4_WHO_OWNER &&
 412                             win_ace_flags & (SEC_ACE_FLAG_OBJECT_INHERIT |
 413                                              SEC_ACE_FLAG_CONTAINER_INHERIT)) {
 414                                 uint32_t win_ace_flags_creator;
 415                                 DEBUG(10, ("Map creator owner\n"));
 416                                 win_ace_flags_creator = win_ace_flags |
 417                                         SMB_ACE4_INHERIT_ONLY_ACE;
 418                                 init_sec_ace(&nt_ace_list[good_aces++],
 419                                              &global_sid_Creator_Owner,
 420                                              ace->aceType, mask,
 421                                              win_ace_flags_creator);
 422                         }
 423                         if (ace->who.special_id == SMB_ACE4_WHO_GROUP &&
 424                             win_ace_flags & (SEC_ACE_FLAG_OBJECT_INHERIT |
 425                                              SEC_ACE_FLAG_CONTAINER_INHERIT)) {
 426                                 uint32_t win_ace_flags_creator;
 427                                 DEBUG(10, ("Map creator owner group\n"));
 428                                 win_ace_flags_creator = win_ace_flags |
 429                                         SMB_ACE4_INHERIT_ONLY_ACE;
 430                                 init_sec_ace(&nt_ace_list[good_aces++],
 431                                              &global_sid_Creator_Group,
 432                                              ace->aceType, mask,
 433                                              win_ace_flags_creator);
 434                         }
 435                 } else {
 436                         DEBUG(10, ("Map normal sid\n"));
 437                         init_sec_ace(&nt_ace_list[good_aces++], &sid,
 438                                      ace->aceType, mask,
 439                                      win_ace_flags);
 440                 }
 441         }
 442
 443         nt_ace_list = talloc_realloc(mem_ctx, nt_ace_list, struct security_ace,
 444                                      good_aces);
 445
 446         /* returns a NULL ace list when good_aces is zero. */
 447         if (good_aces && nt_ace_list == NULL) {
 448                 DEBUG(10, ("realloc error with %d aces", good_aces));
 449                 errno = ENOMEM;
 450                 return false;
 451         }
 452
 453         *ppnt_ace_list = nt_ace_list;
 454         *pgood_aces = good_aces;
 455
 456         return true;
 457 }
 458
 459 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
 460                                            const struct smbacl4_vfs_params *params,
 461                                            uint32_t security_info,
 462                                            TALLOC_CTX *mem_ctx,
 463                                            struct security_descriptor **ppdesc,
 464                                            struct SMB4ACL_T *theacl)
 465 {
 466         int good_aces = 0;
 467         struct dom_sid sid_owner, sid_group;
 468         size_t sd_size = 0;
 469         struct security_ace *nt_ace_list = NULL;
 470         struct security_acl *psa = NULL;
 471         TALLOC_CTX *frame = talloc_stackframe();
 472         bool ok;
 473
 474         if (theacl==NULL) {
 475                 TALLOC_FREE(frame);
 476                 return NT_STATUS_ACCESS_DENIED; /* special because we
 477                                                  * need to think through
 478                                                  * the null case.*/
 479         }
 480
 481         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
 482         gid_to_sid(&sid_group, sbuf->st_ex_gid);
 483
 484         ok = smbacl4_nfs42win(frame, params, theacl, &sid_owner, &sid_group,
 485                               S_ISDIR(sbuf->st_ex_mode),
 486                               &nt_ace_list, &good_aces);
 487         if (!ok) {
 488                 DEBUG(8,("smbacl4_nfs42win failed\n"));
 489                 TALLOC_FREE(frame);
 490                 return map_nt_error_from_unix(errno);
 491         }
 492
 493         psa = make_sec_acl(frame, NT4_ACL_REVISION, good_aces, nt_ace_list);
 494         if (psa == NULL) {
 495                 DEBUG(2,("make_sec_acl failed\n"));
 496                 TALLOC_FREE(frame);
 497                 return NT_STATUS_NO_MEMORY;
 498         }
 499
 500         DEBUG(10,("after make sec_acl\n"));
 501         *ppdesc = make_sec_desc(
 502                 mem_ctx, SD_REVISION, smbacl4_get_controlflags(theacl),
 503                 (security_info & SECINFO_OWNER) ? &sid_owner : NULL,
 504                 (security_info & SECINFO_GROUP) ? &sid_group : NULL,
 505                 NULL, psa, &sd_size);
 506         if (*ppdesc==NULL) {
 507                 DEBUG(2,("make_sec_desc failed\n"));
 508                 TALLOC_FREE(frame);
 509                 return NT_STATUS_NO_MEMORY;
 510         }
 511
 512         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with "
 513                    "sd_size %d\n",
 514                    (int)ndr_size_security_descriptor(*ppdesc, 0)));
 515
 516         TALLOC_FREE(frame);
 517         return NT_STATUS_OK;
 518 }
 519
 520 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
 521                               const struct smbacl4_vfs_params *pparams,
 522                               uint32_t security_info,
 523                               TALLOC_CTX *mem_ctx,
 524                               struct security_descriptor **ppdesc,
 525                               struct SMB4ACL_T *theacl)
 526 {
 527         SMB_STRUCT_STAT sbuf;
 528         struct smbacl4_vfs_params params;
 529         SMB_STRUCT_STAT *psbuf = NULL;
 530
 531         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 532
 533         if (VALID_STAT(fsp->fsp_name->st)) {
 534                 psbuf = &fsp->fsp_name->st;
 535         }
 536
 537         if (psbuf == NULL) {
 538                 if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 539                         return map_nt_error_from_unix(errno);
 540                 }
 541                 psbuf = &sbuf;
 542         }
 543
 544         if (pparams == NULL) {
 545                 /* Special behaviours */
 546                 if (smbacl4_get_vfs_params(fsp->conn, &params)) {
 547                         return NT_STATUS_NO_MEMORY;
 548                 }
 549                 pparams = &params;
 550         }
 551
 552         return smb_get_nt_acl_nfs4_common(psbuf, pparams, security_info,
 553                                           mem_ctx, ppdesc, theacl);
 554 }
 555
 556 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
 557                              const struct smb_filename *smb_fname,
 558                              const struct smbacl4_vfs_params *pparams,
 559                              uint32_t security_info,
 560                              TALLOC_CTX *mem_ctx,
 561                              struct security_descriptor **ppdesc,
 562                              struct SMB4ACL_T *theacl)
 563 {
 564         SMB_STRUCT_STAT sbuf;
 565         struct smbacl4_vfs_params params;
 566         const SMB_STRUCT_STAT *psbuf = NULL;
 567
 568         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n",
 569                 smb_fname->base_name));
 570
 571         if (VALID_STAT(smb_fname->st)) {
 572                 psbuf = &smb_fname->st;
 573         }
 574
 575         if (psbuf == NULL) {
 576                 if (smbacl4_GetFileOwner(conn, smb_fname, &sbuf)) {
 577                         return map_nt_error_from_unix(errno);
 578                 }
 579                 psbuf = &sbuf;
 580         }
 581
 582         if (pparams == NULL) {
 583                 /* Special behaviours */
 584                 if (smbacl4_get_vfs_params(conn, &params)) {
 585                         return NT_STATUS_NO_MEMORY;
 586                 }
 587                 pparams = &params;
 588         }
 589
 590         return smb_get_nt_acl_nfs4_common(psbuf, pparams, security_info,
 591                                           mem_ctx, ppdesc, theacl);
 592 }
 593
 594 static void smbacl4_dump_nfs4acl(int level, struct SMB4ACL_T *acl)
 595 {
 596         struct SMB4ACE_T *aceint;
 597
 598         DEBUG(level, ("NFS4ACL: size=%d\n", acl->naces));
 599
 600         for (aceint = acl->first; aceint != NULL; aceint = aceint->next) {
 601                 SMB_ACE4PROP_T *ace = &aceint->prop;
 602
 603                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, "
 604                               "mask=0x%x, id=%d\n",
 605                               ace->aceType,
 606                               ace->aceFlags, ace->flags,
 607                               ace->aceMask,
 608                               ace->who.id));
 609         }
 610 }
 611
 612 /*
 613  * Find 2 NFS4 who-special ACE property (non-copy!!!)
 614  * match nonzero if "special" and who is equal
 615  * return ace if found matching; otherwise NULL
 616  */
 617 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
 618         struct SMB4ACL_T *acl,
 619         SMB_ACE4PROP_T *aceNew)
 620 {
 621         struct SMB4ACE_T *aceint;
 622
 623         for (aceint = acl->first; aceint != NULL; aceint = aceint->next) {
 624                 SMB_ACE4PROP_T *ace = &aceint->prop;
 625
 626                 DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
 627                           "new type:0x%x flags:0x%x aceFlags:0x%x\n",
 628                           ace->aceType, ace->flags, ace->aceFlags,
 629                           aceNew->aceType, aceNew->flags,aceNew->aceFlags));
 630
 631                 if (ace->flags == aceNew->flags &&
 632                         ace->aceType==aceNew->aceType &&
 633                         ace->aceFlags==aceNew->aceFlags)
 634                 {
 635                         /* keep type safety; e.g. gid is an u.short */
 636                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
 637                         {
 638                                 if (ace->who.special_id ==
 639                                     aceNew->who.special_id)
 640                                         return ace;
 641                         } else {
 642                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
 643                                 {
 644                                         if (ace->who.gid==aceNew->who.gid)
 645                                                 return ace;
 646                                 } else {
 647                                         if (ace->who.uid==aceNew->who.uid)
 648                                                 return ace;
 649                                 }
 650                         }
 651                 }
 652         }
 653
 654         return NULL;
 655 }
 656
 657 static int smbacl4_MergeIgnoreReject(enum smbacl4_acedup_enum acedup,
 658                                      struct SMB4ACL_T *theacl,
 659                                      SMB_ACE4PROP_T *ace,
 660                                      bool *paddNewACE)
 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                         DBG_INFO("ACL rejected by duplicate nt ace.\n");
 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 int nfs4_acl_add_ace(enum smbacl4_acedup_enum acedup,
 689                             struct SMB4ACL_T *nfs4_acl,
 690                             SMB_ACE4PROP_T *nfs4_ace)
 691 {
 692         bool add_ace = true;
 693
 694         if (acedup != e_dontcare) {
 695                 int ret;
 696
 697                 ret = smbacl4_MergeIgnoreReject(acedup, nfs4_acl,
 698                                                 nfs4_ace, &add_ace);
 699                 if (ret == -1) {
 700                         return -1;
 701                 }
 702         }
 703
 704         if (add_ace) {
 705                 smb_add_ace4(nfs4_acl, nfs4_ace);
 706         }
 707
 708         return 0;
 709 }
 710
 711 static int smbacl4_fill_ace4(
 712         bool is_directory,
 713         const struct smbacl4_vfs_params *params,
 714         uid_t ownerUID,
 715         gid_t ownerGID,
 716         const struct security_ace *ace_nt, /* input */
 717         struct SMB4ACL_T *nfs4_acl
 718 )
 719 {
 720         struct dom_sid_buf buf;
 721         SMB_ACE4PROP_T nfs4_ace = { 0 };
 722
 723         DEBUG(10, ("got ace for %s\n",
 724                    dom_sid_str_buf(&ace_nt->trustee, &buf)));
 725
 726         /* only ACCESS|DENY supported right now */
 727         nfs4_ace.aceType = ace_nt->type;
 728
 729         nfs4_ace.aceFlags =
 730                 map_windows_ace_flags_to_nfs4_ace_flags(ace_nt->flags);
 731
 732         /* remove inheritance flags on files */
 733         if (!is_directory) {
 734                 DEBUG(10, ("Removing inheritance flags from a file\n"));
 735                 nfs4_ace.aceFlags &= ~(SMB_ACE4_FILE_INHERIT_ACE|
 736                                        SMB_ACE4_DIRECTORY_INHERIT_ACE|
 737                                        SMB_ACE4_NO_PROPAGATE_INHERIT_ACE|
 738                                        SMB_ACE4_INHERIT_ONLY_ACE);
 739         }
 740
 741         nfs4_ace.aceMask = ace_nt->access_mask & (SEC_STD_ALL | SEC_FILE_ALL);
 742
 743         se_map_generic(&nfs4_ace.aceMask, &file_generic_mapping);
 744
 745         if (dom_sid_equal(&ace_nt->trustee, &global_sid_World)) {
 746                 nfs4_ace.who.special_id = SMB_ACE4_WHO_EVERYONE;
 747                 nfs4_ace.flags |= SMB_ACE4_ID_SPECIAL;
 748         } else if (params->mode!=e_special &&
 749                    dom_sid_equal(&ace_nt->trustee,
 750                                  &global_sid_Creator_Owner)) {
 751                 DEBUG(10, ("Map creator owner\n"));
 752                 nfs4_ace.who.special_id = SMB_ACE4_WHO_OWNER;
 753                 nfs4_ace.flags |= SMB_ACE4_ID_SPECIAL;
 754                 /* A non inheriting creator owner entry has no effect. */
 755                 nfs4_ace.aceFlags |= SMB_ACE4_INHERIT_ONLY_ACE;
 756                 if (!(nfs4_ace.aceFlags & SMB_ACE4_DIRECTORY_INHERIT_ACE)
 757                     && !(nfs4_ace.aceFlags & SMB_ACE4_FILE_INHERIT_ACE)) {
 758                         return 0;
 759                 }
 760         } else if (params->mode!=e_special &&
 761                    dom_sid_equal(&ace_nt->trustee,
 762                                  &global_sid_Creator_Group)) {
 763                 DEBUG(10, ("Map creator owner group\n"));
 764                 nfs4_ace.who.special_id = SMB_ACE4_WHO_GROUP;
 765                 nfs4_ace.flags |= SMB_ACE4_ID_SPECIAL;
 766                 /* A non inheriting creator group entry has no effect. */
 767                 nfs4_ace.aceFlags |= SMB_ACE4_INHERIT_ONLY_ACE;
 768                 if (!(nfs4_ace.aceFlags & SMB_ACE4_DIRECTORY_INHERIT_ACE)
 769                     && !(nfs4_ace.aceFlags & SMB_ACE4_FILE_INHERIT_ACE)) {
 770                         return 0;
 771                 }
 772         } else {
 773                 struct unixid unixid;
 774                 bool ok;
 775
 776                 ok = sids_to_unixids(&ace_nt->trustee, 1, &unixid);
 777                 if (!ok) {
 778                         DBG_WARNING("Could not convert %s to uid or gid.\n",
 779                                     dom_sid_str_buf(&ace_nt->trustee, &buf));
 780                         return 0;
 781                 }
 782
 783                 if (dom_sid_compare_domain(&ace_nt->trustee,
 784                                            &global_sid_Unix_NFS) == 0) {
 785                         return 0;
 786                 }
 787
 788                 switch (unixid.type) {
 789                 case ID_TYPE_BOTH:
 790                         nfs4_ace.aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 791                         nfs4_ace.who.gid = unixid.id;
 792                         break;
 793                 case ID_TYPE_GID:
 794                         nfs4_ace.aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
 795                         nfs4_ace.who.gid = unixid.id;
 796                         break;
 797                 case ID_TYPE_UID:
 798                         nfs4_ace.who.uid = unixid.id;
 799                         break;
 800                 case ID_TYPE_NOT_SPECIFIED:
 801                 default:
 802                         DBG_WARNING("Could not convert %s to uid or gid.\n",
 803                                     dom_sid_str_buf(&ace_nt->trustee, &buf));
 804                         return 0;
 805                 }
 806         }
 807
 808         return nfs4_acl_add_ace(params->acedup, nfs4_acl, &nfs4_ace);
 809 }
 810
 811 static void smbacl4_substitute_special(struct SMB4ACL_T *acl,
 812                                        uid_t ownerUID,
 813                                        gid_t ownerGID)
 814 {
 815         struct SMB4ACE_T *aceint;
 816
 817         for (aceint = acl->first; aceint != NULL; aceint = aceint->next) {
 818                 SMB_ACE4PROP_T *ace = &aceint->prop;
 819
 820                 DEBUG(10,("ace type: %d, iflags: %x, flags: %x, "
 821                           "mask: %x, who: %d\n",
 822                           ace->aceType, ace->flags, ace->aceFlags,
 823                           ace->aceMask, ace->who.id));
 824
 825                 if (!(ace->flags & SMB_ACE4_ID_SPECIAL) &&
 826                     !(ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) &&
 827                     ace->who.uid == ownerUID) {
 828                         ace->flags |= SMB_ACE4_ID_SPECIAL;
 829                         ace->who.special_id = SMB_ACE4_WHO_OWNER;
 830                         DEBUG(10,("replaced with special owner ace\n"));
 831                 }
 832
 833                 if (!(ace->flags & SMB_ACE4_ID_SPECIAL) &&
 834                     ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP &&
 835                     ace->who.uid == ownerGID) {
 836                         ace->flags |= SMB_ACE4_ID_SPECIAL;
 837                         ace->who.special_id = SMB_ACE4_WHO_GROUP;
 838                         DEBUG(10,("replaced with special group ace\n"));
 839                 }
 840         }
 841         return true; /* OK */
 842 }
 843
 844 static int smbacl4_substitute_simple(
 845         struct SMB4ACL_T *acl,
 846         uid_t ownerUID,
 847         gid_t ownerGID
 848 )
 849 {
 850         struct SMB4ACE_T *aceint;
 851
 852         for (aceint = acl->first; aceint != NULL; aceint = aceint->next) {
 853                 SMB_ACE4PROP_T *ace = &aceint->prop;
 854
 855                 DEBUG(10,("ace type: %d, iflags: %x, flags: %x, "
 856                           "mask: %x, who: %d\n",
 857                           ace->aceType, ace->flags, ace->aceFlags,
 858                           ace->aceMask, ace->who.id));
 859
 860                 if (!(ace->flags & SMB_ACE4_ID_SPECIAL) &&
 861                     !(ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) &&
 862                     ace->who.uid == ownerUID &&
 863                     !nfs_ace_is_inherit(ace)) {
 864                         ace->flags |= SMB_ACE4_ID_SPECIAL;
 865                         ace->who.special_id = SMB_ACE4_WHO_OWNER;
 866                         DEBUG(10,("replaced with special owner ace\n"));
 867                 }
 868
 869                 if (!(ace->flags & SMB_ACE4_ID_SPECIAL) &&
 870                     ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP &&
 871                     ace->who.gid == ownerGID &&
 872                     !nfs_ace_is_inherit(ace)) {
 873                         ace->flags |= SMB_ACE4_ID_SPECIAL;
 874                         ace->who.special_id = SMB_ACE4_WHO_GROUP;
 875                         DEBUG(10,("replaced with special group ace\n"));
 876                 }
 877         }
 878         return true; /* OK */
 879 }
 880
 881 static struct SMB4ACL_T *smbacl4_win2nfs4(
 882         TALLOC_CTX *mem_ctx,
 883         bool is_directory,
 884         const struct security_acl *dacl,
 885         const struct smbacl4_vfs_params *pparams,
 886         uid_t ownerUID,
 887         gid_t ownerGID
 888 )
 889 {
 890         struct SMB4ACL_T *theacl;
 891         uint32_t i;
 892
 893         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
 894
 895         theacl = smb_create_smb4acl(mem_ctx);
 896         if (theacl==NULL)
 897                 return NULL;
 898
 899         for(i=0; i<dacl->num_aces; i++) {
 900                 int ret;
 901
 902                 ret = smbacl4_fill_ace4(is_directory, pparams,
 903                                         ownerUID, ownerGID,
 904                                         dacl->aces + i, theacl);
 905                 if (ret == -1) {
 906                         return NULL;
 907                 }
 908         }
 909
 910         if (pparams->mode==e_simple) {
 911                 smbacl4_substitute_simple(theacl, ownerUID, ownerGID);
 912         }
 913
 914         if (pparams->mode==e_special) {
 915                 smbacl4_substitute_special(theacl, ownerUID, ownerGID);
 916         }
 917
 918         return theacl;
 919 }
 920
 921 NTSTATUS smb_set_nt_acl_nfs4(vfs_handle_struct *handle, files_struct *fsp,
 922         const struct smbacl4_vfs_params *pparams,
 923         uint32_t security_info_sent,
 924         const struct security_descriptor *psd,
 925         set_nfs4acl_native_fn_t set_nfs4_native)
 926 {
 927         struct smbacl4_vfs_params params;
 928         struct SMB4ACL_T *theacl = NULL;
 929         bool    result, is_directory;
 930
 931         SMB_STRUCT_STAT sbuf;
 932         bool set_acl_as_root = false;
 933         uid_t newUID = (uid_t)-1;
 934         gid_t newGID = (gid_t)-1;
 935         int saved_errno;
 936         TALLOC_CTX *frame = talloc_stackframe();
 937
 938         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
 939
 940         if ((security_info_sent & (SECINFO_DACL |
 941                 SECINFO_GROUP | SECINFO_OWNER)) == 0)
 942         {
 943                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
 944                         security_info_sent));
 945                 TALLOC_FREE(frame);
 946                 return NT_STATUS_OK; /* won't show error - later to be
 947                                       * refined... */
 948         }
 949
 950         if (pparams == NULL) {
 951                 /* Special behaviours */
 952                 if (smbacl4_get_vfs_params(fsp->conn, &params)) {
 953                         TALLOC_FREE(frame);
 954                         return NT_STATUS_NO_MEMORY;
 955                 }
 956                 pparams = &params;
 957         }
 958
 959         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
 960                 TALLOC_FREE(frame);
 961                 return map_nt_error_from_unix(errno);
 962         }
 963
 964         is_directory = S_ISDIR(sbuf.st_ex_mode);
 965
 966         if (pparams->do_chown) {
 967                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
 968                 NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID,
 969                                                    security_info_sent, psd);
 970                 if (!NT_STATUS_IS_OK(status)) {
 971                         DEBUG(8, ("unpack_nt_owners failed"));
 972                         TALLOC_FREE(frame);
 973                         return status;
 974                 }
 975                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
 976                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
 977
 978                         status = try_chown(fsp, newUID, newGID);
 979                         if (!NT_STATUS_IS_OK(status)) {
 980                                 DEBUG(3,("chown %s, %u, %u failed. Error = "
 981                                          "%s.\n", fsp_str_dbg(fsp),
 982                                          (unsigned int)newUID,
 983                                          (unsigned int)newGID,
 984                                          nt_errstr(status)));
 985                                 TALLOC_FREE(frame);
 986                                 return status;
 987                         }
 988
 989                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
 990                                   fsp_str_dbg(fsp), (unsigned int)newUID,
 991                                   (unsigned int)newGID));
 992                         if (smbacl4_GetFileOwner(fsp->conn,
 993                                                  fsp->fsp_name,
 994                                                  &sbuf)){
 995                                 TALLOC_FREE(frame);
 996                                 return map_nt_error_from_unix(errno);
 997                         }
 998
 999                         /* If we successfully chowned, we know we must
1000                          * be able to set the acl, so do it as root.
1001                          */
1002                         set_acl_as_root = true;
1003                 }
1004         }
1005
1006         if (!(security_info_sent & SECINFO_DACL) || psd->dacl ==NULL) {
1007                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n",
1008                            security_info_sent));
1009                 TALLOC_FREE(frame);
1010                 return NT_STATUS_OK;
1011         }
1012
1013         theacl = smbacl4_win2nfs4(frame, is_directory, psd->dacl, pparams,
1014                                   sbuf.st_ex_uid, sbuf.st_ex_gid);
1015         if (!theacl) {
1016                 TALLOC_FREE(frame);
1017                 return map_nt_error_from_unix(errno);
1018         }
1019
1020         smbacl4_set_controlflags(theacl, psd->type);
1021         smbacl4_dump_nfs4acl(10, theacl);
1022
1023         if (set_acl_as_root) {
1024                 become_root();
1025         }
1026         result = set_nfs4_native(handle, fsp, theacl);
1027         saved_errno = errno;
1028         if (set_acl_as_root) {
1029                 unbecome_root();
1030         }
1031
1032         TALLOC_FREE(frame);
1033
1034         if (result!=true) {
1035                 errno = saved_errno;
1036                 DEBUG(10, ("set_nfs4_native failed with %s\n",
1037                            strerror(errno)));
1038                 return map_nt_error_from_unix(errno);
1039         }
1040
1041         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
1042         return NT_STATUS_OK;
1043 }