r19787: get winbindd compiling
[Samba.git] / source / modules / vfs_afsacl.c
blob2ace4aed3186d76412333a414ebacf61824e91eb
1 /*
2 * Convert AFS acls to NT acls and vice versa.
4 * Copyright (C) Volker Lendecke, 2003
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 2 of the License, or
9 * (at your option) any later version.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "includes.h"
23 #undef DBGC_CLASS
24 #define DBGC_CLASS DBGC_VFS
26 #include <afs/stds.h>
27 #include <afs/afs.h>
28 #include <afs/auth.h>
29 #include <afs/venus.h>
30 #include <afs/prs_fs.h>
32 #define MAXSIZE 2048
34 extern const DOM_SID global_sid_World;
35 extern const DOM_SID global_sid_Builtin_Administrators;
36 extern const DOM_SID global_sid_Builtin_Backup_Operators;
37 extern const DOM_SID global_sid_Authenticated_Users;
38 extern const DOM_SID global_sid_NULL;
40 static char space_replacement = '%';
42 /* Do we expect SIDs as pts names? */
43 static BOOL sidpts;
45 extern int afs_syscall(int, char *, int, char *, int);
47 struct afs_ace {
48 BOOL positive;
49 char *name;
50 DOM_SID sid;
51 enum SID_NAME_USE type;
52 uint32 rights;
53 struct afs_ace *next;
56 struct afs_acl {
57 TALLOC_CTX *ctx;
58 int type;
59 int num_aces;
60 struct afs_ace *acelist;
63 struct afs_iob {
64 char *in, *out;
65 uint16 in_size, out_size;
69 static BOOL init_afs_acl(struct afs_acl *acl)
71 ZERO_STRUCT(*acl);
72 acl->ctx = talloc_init("afs_acl");
73 if (acl->ctx == NULL) {
74 DEBUG(10, ("Could not init afs_acl"));
75 return False;
77 return True;
80 static void free_afs_acl(struct afs_acl *acl)
82 if (acl->ctx != NULL)
83 talloc_destroy(acl->ctx);
84 acl->ctx = NULL;
85 acl->num_aces = 0;
86 acl->acelist = NULL;
89 static struct afs_ace *clone_afs_ace(TALLOC_CTX *mem_ctx, struct afs_ace *ace)
91 struct afs_ace *result = TALLOC_P(mem_ctx, struct afs_ace);
93 if (result == NULL)
94 return NULL;
96 *result = *ace;
98 result->next = NULL;
99 result->name = talloc_strdup(mem_ctx, ace->name);
101 if (result->name == NULL) {
102 return NULL;
105 return result;
108 static struct afs_ace *new_afs_ace(TALLOC_CTX *mem_ctx,
109 BOOL positive,
110 const char *name, uint32 rights)
112 DOM_SID sid;
113 enum SID_NAME_USE type;
114 struct afs_ace *result;
116 if (strcmp(name, "system:administrators") == 0) {
118 sid_copy(&sid, &global_sid_Builtin_Administrators);
119 type = SID_NAME_ALIAS;
121 } else if (strcmp(name, "system:anyuser") == 0) {
123 sid_copy(&sid, &global_sid_World);
124 type = SID_NAME_ALIAS;
126 } else if (strcmp(name, "system:authuser") == 0) {
128 sid_copy(&sid, &global_sid_Authenticated_Users);
129 type = SID_NAME_WKN_GRP;
131 } else if (strcmp(name, "system:backup") == 0) {
133 sid_copy(&sid, &global_sid_Builtin_Backup_Operators);
134 type = SID_NAME_ALIAS;
136 } else if (sidpts) {
137 /* All PTS users/groups are expressed as SIDs */
139 sid_copy(&sid, &global_sid_NULL);
140 type = SID_NAME_UNKNOWN;
142 if (string_to_sid(&sid, name)) {
143 const char *user, *domain;
144 /* We have to find the type, look up the SID */
145 lookup_sid(tmp_talloc_ctx(), &sid,
146 &domain, &user, &type);
149 } else {
151 const char *domain, *uname;
152 char *p;
154 p = strchr_m(name, *lp_winbind_separator());
155 if (p != NULL) {
156 *p = '\\';
159 if (!lookup_name(tmp_talloc_ctx(), name, LOOKUP_NAME_ALL,
160 &domain, &uname, &sid, &type)) {
161 DEBUG(10, ("Could not find AFS user %s\n", name));
163 sid_copy(&sid, &global_sid_NULL);
164 type = SID_NAME_UNKNOWN;
169 result = TALLOC_P(mem_ctx, struct afs_ace);
171 if (result == NULL) {
172 DEBUG(0, ("Could not talloc AFS ace\n"));
173 return NULL;
176 result->name = talloc_strdup(mem_ctx, name);
177 if (result->name == NULL) {
178 DEBUG(0, ("Could not talloc AFS ace name\n"));
179 return NULL;
182 result->sid = sid;
183 result->type = type;
185 result->positive = positive;
186 result->rights = rights;
188 return result;
191 static void add_afs_ace(struct afs_acl *acl,
192 BOOL positive,
193 const char *name, uint32 rights)
195 struct afs_ace *ace;
197 for (ace = acl->acelist; ace != NULL; ace = ace->next) {
198 if ((ace->positive == positive) &&
199 (strequal(ace->name, name))) {
200 ace->rights |= rights;
201 return;
205 ace = new_afs_ace(acl->ctx, positive, name, rights);
207 ace->next = acl->acelist;
208 acl->acelist = ace;
210 acl->num_aces += 1;
212 DEBUG(10, ("add_afs_ace: Added %s entry for %s with rights %d\n",
213 ace->positive?"positive":"negative",
214 ace->name, ace->rights));
216 return;
219 /* AFS ACLs in string form are a long string of fields delimited with \n.
221 * First line: Number of positive entries
222 * Second line: Number of negative entries
223 * Third and following lines: The entries themselves
225 * An ACE is a line of two fields, delimited by \t.
227 * First field: Name
228 * Second field: Rights
231 static BOOL parse_afs_acl(struct afs_acl *acl, const char *acl_str)
233 int nplus, nminus;
234 int aces;
236 char str[MAXSIZE+1];
237 char *p = str;
239 strncpy(str, acl_str, MAXSIZE);
241 if (sscanf(p, "%d", &nplus) != 1)
242 return False;
244 DEBUG(10, ("Found %d positive entries\n", nplus));
246 if ((p = strchr(p, '\n')) == NULL)
247 return False;
248 p += 1;
250 if (sscanf(p, "%d", &nminus) != 1)
251 return False;
253 DEBUG(10, ("Found %d negative entries\n", nminus));
255 if ((p = strchr(p, '\n')) == NULL)
256 return False;
257 p += 1;
259 for (aces = nplus+nminus; aces > 0; aces--)
262 const char *namep;
263 fstring name;
264 uint32 rights;
265 char *space;
267 namep = p;
269 if ((p = strchr(p, '\t')) == NULL)
270 return False;
271 *p = '\0';
272 p += 1;
274 if (sscanf(p, "%d", &rights) != 1)
275 return False;
277 if ((p = strchr(p, '\n')) == NULL)
278 return False;
279 p += 1;
281 fstrcpy(name, namep);
283 while ((space = strchr_m(name, space_replacement)) != NULL)
284 *space = ' ';
286 add_afs_ace(acl, nplus>0, name, rights);
288 nplus -= 1;
291 return True;
294 static BOOL unparse_afs_acl(struct afs_acl *acl, char *acl_str)
296 /* TODO: String length checks!!!! */
298 int positives = 0;
299 int negatives = 0;
300 fstring line;
302 *acl_str = 0;
304 struct afs_ace *ace = acl->acelist;
306 while (ace != NULL) {
307 if (ace->positive)
308 positives++;
309 else
310 negatives++;
311 ace = ace->next;
314 fstr_sprintf(line, "%d\n", positives);
315 safe_strcat(acl_str, line, MAXSIZE);
317 fstr_sprintf(line, "%d\n", negatives);
318 safe_strcat(acl_str, line, MAXSIZE);
320 ace = acl->acelist;
322 while (ace != NULL) {
323 fstr_sprintf(line, "%s\t%d\n", ace->name, ace->rights);
324 safe_strcat(acl_str, line, MAXSIZE);
325 ace = ace->next;
327 return True;
330 static uint32 afs_to_nt_file_rights(uint32 rights)
332 uint32 result = 0;
334 if (rights & PRSFS_READ)
335 result |= FILE_READ_DATA | FILE_READ_EA |
336 FILE_EXECUTE | FILE_READ_ATTRIBUTES |
337 READ_CONTROL_ACCESS | SYNCHRONIZE_ACCESS;
339 if (rights & PRSFS_WRITE)
340 result |= FILE_WRITE_DATA | FILE_WRITE_ATTRIBUTES |
341 FILE_WRITE_EA | FILE_APPEND_DATA;
343 if (rights & PRSFS_LOCK)
344 result |= WRITE_OWNER_ACCESS;
346 if (rights & PRSFS_DELETE)
347 result |= DELETE_ACCESS;
349 return result;
352 static void afs_to_nt_dir_rights(uint32 afs_rights, uint32 *nt_rights,
353 uint8 *flag)
355 *nt_rights = 0;
356 *flag = SEC_ACE_FLAG_OBJECT_INHERIT |
357 SEC_ACE_FLAG_CONTAINER_INHERIT;
359 if (afs_rights & PRSFS_INSERT)
360 *nt_rights |= FILE_ADD_FILE | FILE_ADD_SUBDIRECTORY;
362 if (afs_rights & PRSFS_LOOKUP)
363 *nt_rights |= FILE_READ_DATA | FILE_READ_EA |
364 FILE_EXECUTE | FILE_READ_ATTRIBUTES |
365 READ_CONTROL_ACCESS | SYNCHRONIZE_ACCESS;
367 if (afs_rights & PRSFS_WRITE)
368 *nt_rights |= FILE_WRITE_ATTRIBUTES | FILE_WRITE_DATA |
369 FILE_APPEND_DATA | FILE_WRITE_EA;
371 if ((afs_rights & (PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE)) ==
372 (PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE))
373 *nt_rights |= FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA |
374 GENERIC_WRITE_ACCESS;
376 if (afs_rights & PRSFS_DELETE)
377 *nt_rights |= DELETE_ACCESS;
379 if (afs_rights & PRSFS_ADMINISTER)
380 *nt_rights |= FILE_DELETE_CHILD | WRITE_DAC_ACCESS |
381 WRITE_OWNER_ACCESS;
383 if ( (afs_rights & PRSFS_LOOKUP) ==
384 (afs_rights & (PRSFS_LOOKUP|PRSFS_READ)) ) {
385 /* Only lookup right */
386 *flag = SEC_ACE_FLAG_CONTAINER_INHERIT;
389 return;
392 #define AFS_FILE_RIGHTS (PRSFS_READ|PRSFS_WRITE|PRSFS_LOCK)
393 #define AFS_DIR_RIGHTS (PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE|PRSFS_ADMINISTER)
395 static void split_afs_acl(struct afs_acl *acl,
396 struct afs_acl *dir_acl,
397 struct afs_acl *file_acl)
399 struct afs_ace *ace;
401 init_afs_acl(dir_acl);
402 init_afs_acl(file_acl);
404 for (ace = acl->acelist; ace != NULL; ace = ace->next) {
405 if (ace->rights & AFS_FILE_RIGHTS) {
406 add_afs_ace(file_acl, ace->positive, ace->name,
407 ace->rights & AFS_FILE_RIGHTS);
410 if (ace->rights & AFS_DIR_RIGHTS) {
411 add_afs_ace(dir_acl, ace->positive, ace->name,
412 ace->rights & AFS_DIR_RIGHTS);
415 return;
418 static BOOL same_principal(struct afs_ace *x, struct afs_ace *y)
420 return ( (x->positive == y->positive) &&
421 (sid_compare(&x->sid, &y->sid) == 0) );
424 static void merge_afs_acls(struct afs_acl *dir_acl,
425 struct afs_acl *file_acl,
426 struct afs_acl *target)
428 struct afs_ace *ace;
430 init_afs_acl(target);
432 for (ace = dir_acl->acelist; ace != NULL; ace = ace->next) {
433 struct afs_ace *file_ace;
434 BOOL found = False;
436 for (file_ace = file_acl->acelist;
437 file_ace != NULL;
438 file_ace = file_ace->next) {
439 if (!same_principal(ace, file_ace))
440 continue;
442 add_afs_ace(target, ace->positive, ace->name,
443 ace->rights | file_ace->rights);
444 found = True;
445 break;
447 if (!found)
448 add_afs_ace(target, ace->positive, ace->name,
449 ace->rights);
452 for (ace = file_acl->acelist; ace != NULL; ace = ace->next) {
453 struct afs_ace *dir_ace;
454 BOOL already_seen = False;
456 for (dir_ace = dir_acl->acelist;
457 dir_ace != NULL;
458 dir_ace = dir_ace->next) {
459 if (!same_principal(ace, dir_ace))
460 continue;
461 already_seen = True;
462 break;
464 if (!already_seen)
465 add_afs_ace(target, ace->positive, ace->name,
466 ace->rights);
470 #define PERMS_READ 0x001200a9
471 #define PERMS_CHANGE 0x001301bf
472 #define PERMS_FULL 0x001f01ff
474 static struct static_dir_ace_mapping {
475 uint8 type;
476 uint8 flags;
477 uint32 mask;
478 uint32 afs_rights;
479 } ace_mappings[] = {
481 /* Full control */
482 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
483 PERMS_FULL, 127 /* rlidwka */ },
485 /* Change (write) */
486 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
487 PERMS_CHANGE, 63 /* rlidwk */ },
489 /* Read (including list folder content) */
490 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
491 PERMS_READ, 9 /* rl */ },
493 /* Read without list folder content -- same as "l" */
494 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
495 0x00120089, 8 /* l */ },
497 /* some stupid workaround for preventing fallbacks */
498 { 0, 0x3, 0x0012019F, 9 /* rl */ },
499 { 0, 0x13, PERMS_FULL, 127 /* full */ },
501 /* read, delete and execute access plus synchronize */
502 { 0, 0x3, 0x001300A9, 9 /* should be rdl, set to rl */},
503 /* classical read list */
504 { 0, 0x13, 0x001200A9, 9 /* rl */},
505 /* almost full control, no delete */
506 { 0, 0x13, PERMS_CHANGE, 63 /* rwidlk */},
508 /* List folder */
509 { 0, SEC_ACE_FLAG_CONTAINER_INHERIT,
510 PERMS_READ, 8 /* l */ },
512 /* FULL without inheritance -- in all cases here we also get
513 the corresponding INHERIT_ONLY ACE in the same ACL */
514 { 0, 0, PERMS_FULL, 127 /* rlidwka */ },
516 /* FULL inherit only -- counterpart to previous one */
517 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY,
518 PERMS_FULL | GENERIC_RIGHT_WRITE_ACCESS, 127 /* rlidwka */ },
520 /* CHANGE without inheritance -- in all cases here we also get
521 the corresponding INHERIT_ONLY ACE in the same ACL */
522 { 0, 0, PERMS_CHANGE, 63 /* rlidwk */ },
524 /* CHANGE inherit only -- counterpart to previous one */
525 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY,
526 PERMS_CHANGE | GENERIC_RIGHT_WRITE_ACCESS, 63 /* rlidwk */ },
528 /* End marker, hopefully there's no afs right 9999 :-) */
529 { 0, 0, 0, 9999 }
532 static uint32 nt_to_afs_dir_rights(const char *filename, const SEC_ACE *ace)
534 uint32 result = 0;
535 uint32 rights = ace->info.mask;
536 uint8 flags = ace->flags;
538 struct static_dir_ace_mapping *m;
540 for (m = &ace_mappings[0]; m->afs_rights != 9999; m++) {
541 if ( (ace->type == m->type) &&
542 (ace->flags == m->flags) &&
543 (ace->info.mask == m->mask) )
544 return m->afs_rights;
547 DEBUG(1, ("AFSACL FALLBACK: 0x%X 0x%X 0x%X %s %X\n",
548 ace->type, ace->flags, ace->info.mask, filename, rights));
550 if (rights & (GENERIC_ALL_ACCESS|WRITE_DAC_ACCESS)) {
551 result |= PRSFS_READ | PRSFS_WRITE | PRSFS_INSERT |
552 PRSFS_LOOKUP | PRSFS_DELETE | PRSFS_LOCK |
553 PRSFS_ADMINISTER;
556 if (rights & (GENERIC_READ_ACCESS|FILE_READ_DATA)) {
557 result |= PRSFS_LOOKUP;
558 if (flags & SEC_ACE_FLAG_OBJECT_INHERIT) {
559 result |= PRSFS_READ;
563 if (rights & (GENERIC_WRITE_ACCESS|FILE_WRITE_DATA)) {
564 result |= PRSFS_INSERT | PRSFS_DELETE;
565 if (flags & SEC_ACE_FLAG_OBJECT_INHERIT) {
566 result |= PRSFS_WRITE | PRSFS_LOCK;
570 return result;
573 static uint32 nt_to_afs_file_rights(const char *filename, const SEC_ACE *ace)
575 uint32 result = 0;
576 uint32 rights = ace->info.mask;
578 if (rights & (GENERIC_READ_ACCESS|FILE_READ_DATA)) {
579 result |= PRSFS_READ;
582 if (rights & (GENERIC_WRITE_ACCESS|FILE_WRITE_DATA)) {
583 result |= PRSFS_WRITE | PRSFS_LOCK;
586 return result;
589 static size_t afs_to_nt_acl(struct afs_acl *afs_acl,
590 struct files_struct *fsp,
591 uint32 security_info,
592 struct security_descriptor **ppdesc)
594 SEC_ACE *nt_ace_list;
595 DOM_SID owner_sid, group_sid;
596 SEC_ACCESS mask;
597 SMB_STRUCT_STAT sbuf;
598 SEC_ACL *psa = NULL;
599 int good_aces;
600 size_t sd_size;
601 TALLOC_CTX *mem_ctx = main_loop_talloc_get();
603 struct afs_ace *afs_ace;
605 if (fsp->is_directory || fsp->fh->fd == -1) {
606 /* Get the stat struct for the owner info. */
607 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
608 return 0;
610 } else {
611 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
612 return 0;
616 uid_to_sid(&owner_sid, sbuf.st_uid);
617 gid_to_sid(&group_sid, sbuf.st_gid);
619 nt_ace_list = TALLOC_ARRAY(mem_ctx, SEC_ACE, afs_acl->num_aces);
621 if (nt_ace_list == NULL)
622 return 0;
624 afs_ace = afs_acl->acelist;
625 good_aces = 0;
627 while (afs_ace != NULL) {
628 uint32 nt_rights;
629 uint8 flag = SEC_ACE_FLAG_OBJECT_INHERIT |
630 SEC_ACE_FLAG_CONTAINER_INHERIT;
632 if (afs_ace->type == SID_NAME_UNKNOWN) {
633 DEBUG(10, ("Ignoring unknown name %s\n",
634 afs_ace->name));
635 afs_ace = afs_ace->next;
636 continue;
639 if (fsp->is_directory)
640 afs_to_nt_dir_rights(afs_ace->rights, &nt_rights,
641 &flag);
642 else
643 nt_rights = afs_to_nt_file_rights(afs_ace->rights);
645 init_sec_access(&mask, nt_rights);
646 init_sec_ace(&nt_ace_list[good_aces++], &(afs_ace->sid),
647 SEC_ACE_TYPE_ACCESS_ALLOWED, mask, flag);
648 afs_ace = afs_ace->next;
651 psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION,
652 good_aces, nt_ace_list);
653 if (psa == NULL)
654 return 0;
657 *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION,
658 SEC_DESC_SELF_RELATIVE,
659 (security_info & OWNER_SECURITY_INFORMATION)
660 ? &owner_sid : NULL,
661 (security_info & GROUP_SECURITY_INFORMATION)
662 ? &group_sid : NULL,
663 NULL, psa, &sd_size);
665 return sd_size;
668 static BOOL mappable_sid(const DOM_SID *sid)
670 DOM_SID domain_sid;
672 if (sid_compare(sid, &global_sid_Builtin_Administrators) == 0)
673 return True;
675 if (sid_compare(sid, &global_sid_World) == 0)
676 return True;
678 if (sid_compare(sid, &global_sid_Authenticated_Users) == 0)
679 return True;
681 if (sid_compare(sid, &global_sid_Builtin_Backup_Operators) == 0)
682 return True;
684 string_to_sid(&domain_sid, "S-1-5-21");
686 if (sid_compare_domain(sid, &domain_sid) == 0)
687 return True;
689 return False;
692 static BOOL nt_to_afs_acl(const char *filename,
693 uint32 security_info_sent,
694 struct security_descriptor *psd,
695 uint32 (*nt_to_afs_rights)(const char *filename,
696 const SEC_ACE *ace),
697 struct afs_acl *afs_acl)
699 SEC_ACL *dacl;
700 int i;
702 /* Currently we *only* look at the dacl */
704 if (((security_info_sent & DACL_SECURITY_INFORMATION) == 0) ||
705 (psd->dacl == NULL))
706 return True;
708 if (!init_afs_acl(afs_acl))
709 return False;
711 dacl = psd->dacl;
713 for (i = 0; i < dacl->num_aces; i++) {
714 SEC_ACE *ace = &(dacl->ace[i]);
715 const char *dom_name, *name;
716 enum SID_NAME_USE name_type;
717 char *p;
719 if (ace->type != SEC_ACE_TYPE_ACCESS_ALLOWED) {
720 /* First cut: Only positive ACEs */
721 return False;
724 if (!mappable_sid(&ace->trustee)) {
725 DEBUG(10, ("Ignoring unmappable SID %s\n",
726 sid_string_static(&ace->trustee)));
727 continue;
730 if (sid_compare(&ace->trustee,
731 &global_sid_Builtin_Administrators) == 0) {
733 name = "system:administrators";
735 } else if (sid_compare(&ace->trustee,
736 &global_sid_World) == 0) {
738 name = "system:anyuser";
740 } else if (sid_compare(&ace->trustee,
741 &global_sid_Authenticated_Users) == 0) {
743 name = "system:authuser";
745 } else if (sid_compare(&ace->trustee,
746 &global_sid_Builtin_Backup_Operators)
747 == 0) {
749 name = "system:backup";
751 } else {
753 if (!lookup_sid(tmp_talloc_ctx(), &ace->trustee,
754 &dom_name, &name, &name_type)) {
755 DEBUG(1, ("AFSACL: Could not lookup SID %s on file %s\n",
756 sid_string_static(&ace->trustee), filename));
757 continue;
760 if ( (name_type == SID_NAME_USER) ||
761 (name_type == SID_NAME_DOM_GRP) ||
762 (name_type == SID_NAME_ALIAS) ) {
763 char *tmp;
764 tmp = talloc_asprintf(tmp_talloc_ctx(), "%s%s%s",
765 dom_name, lp_winbind_separator(),
766 name);
767 if (tmp == NULL) {
768 return False;
770 strlower_m(tmp);
771 name = tmp;
774 if (sidpts) {
775 /* Expect all users/groups in pts as SIDs */
776 name = talloc_strdup(
777 tmp_talloc_ctx(),
778 sid_string_static(&ace->trustee));
779 if (name == NULL) {
780 return False;
785 while ((p = strchr_m(name, ' ')) != NULL)
786 *p = space_replacement;
788 add_afs_ace(afs_acl, True, name,
789 nt_to_afs_rights(filename, ace));
792 return True;
795 static BOOL afs_get_afs_acl(char *filename, struct afs_acl *acl)
797 struct afs_iob iob;
799 int ret;
801 char space[MAXSIZE];
803 DEBUG(5, ("afs_get_afs_acl: %s\n", filename));
805 iob.in_size = 0;
806 iob.out_size = MAXSIZE;
807 iob.in = iob.out = space;
809 ret = afs_syscall(AFSCALL_PIOCTL, filename, VIOCGETAL,
810 (char *)&iob, 0);
812 if (ret) {
813 DEBUG(1, ("got error from PIOCTL: %d\n", ret));
814 return False;
817 if (!init_afs_acl(acl))
818 return False;
820 if (!parse_afs_acl(acl, space)) {
821 DEBUG(1, ("Could not parse AFS acl\n"));
822 free_afs_acl(acl);
823 return False;
826 return True;
829 static size_t afs_get_nt_acl(struct files_struct *fsp, uint32 security_info,
830 struct security_descriptor **ppdesc)
832 struct afs_acl acl;
833 size_t sd_size;
835 DEBUG(5, ("afs_get_nt_acl: %s\n", fsp->fsp_name));
837 sidpts = lp_parm_bool(SNUM(fsp->conn), "afsacl", "sidpts", False);
839 if (!afs_get_afs_acl(fsp->fsp_name, &acl)) {
840 return 0;
843 sd_size = afs_to_nt_acl(&acl, fsp, security_info, ppdesc);
845 free_afs_acl(&acl);
847 return sd_size;
850 /* For setting an AFS ACL we have to take care of the ACEs we could
851 * not properly map to SIDs. Merge all of them into the new ACL. */
853 static void merge_unknown_aces(struct afs_acl *src, struct afs_acl *dst)
855 struct afs_ace *ace;
857 for (ace = src->acelist; ace != NULL; ace = ace->next)
859 struct afs_ace *copy;
861 if (ace->type != SID_NAME_UNKNOWN) {
862 DEBUG(10, ("Not merging known ACE for %s\n",
863 ace->name));
864 continue;
867 DEBUG(10, ("Merging unknown ACE for %s\n", ace->name));
869 copy = clone_afs_ace(dst->ctx, ace);
871 if (copy == NULL) {
872 DEBUG(0, ("Could not clone ACE for %s\n", ace->name));
873 continue;
876 copy->next = dst->acelist;
877 dst->acelist = copy;
878 dst->num_aces += 1;
882 static BOOL afs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
883 uint32 security_info_sent,
884 struct security_descriptor *psd)
886 struct afs_acl old_afs_acl, new_afs_acl;
887 struct afs_acl dir_acl, file_acl;
888 char acl_string[2049];
889 struct afs_iob iob;
890 int ret = -1;
891 pstring name;
892 const char *fileacls;
894 fileacls = lp_parm_const_string(SNUM(handle->conn), "afsacl", "fileacls",
895 "yes");
897 sidpts = lp_parm_bool(SNUM(handle->conn), "afsacl", "sidpts", False);
899 ZERO_STRUCT(old_afs_acl);
900 ZERO_STRUCT(new_afs_acl);
901 ZERO_STRUCT(dir_acl);
902 ZERO_STRUCT(file_acl);
904 pstr_sprintf(name, fsp->fsp_name);
906 if (!fsp->is_directory) {
907 /* We need to get the name of the directory containing the
908 * file, this is where the AFS acls live */
909 char *p = strrchr(name, '/');
910 if (p != NULL) {
911 *p = '\0';
912 } else {
913 pstrcpy(name, ".");
917 if (!afs_get_afs_acl(name, &old_afs_acl)) {
918 DEBUG(3, ("Could not get old ACL of %s\n", fsp->fsp_name));
919 goto done;
922 split_afs_acl(&old_afs_acl, &dir_acl, &file_acl);
924 if (fsp->is_directory) {
926 if (!strequal(fileacls, "yes")) {
927 /* Throw away file acls, we depend on the
928 * inheritance ACEs that also give us file
929 * permissions */
930 free_afs_acl(&file_acl);
933 free_afs_acl(&dir_acl);
934 if (!nt_to_afs_acl(fsp->fsp_name, security_info_sent, psd,
935 nt_to_afs_dir_rights, &dir_acl))
936 goto done;
937 } else {
938 if (strequal(fileacls, "no")) {
939 ret = -1;
940 goto done;
943 if (strequal(fileacls, "ignore")) {
944 ret = 0;
945 goto done;
948 free_afs_acl(&file_acl);
949 if (!nt_to_afs_acl(fsp->fsp_name, security_info_sent, psd,
950 nt_to_afs_file_rights, &file_acl))
951 goto done;
954 merge_afs_acls(&dir_acl, &file_acl, &new_afs_acl);
956 merge_unknown_aces(&old_afs_acl, &new_afs_acl);
958 unparse_afs_acl(&new_afs_acl, acl_string);
960 iob.in = acl_string;
961 iob.in_size = 1+strlen(iob.in);
962 iob.out = NULL;
963 iob.out_size = 0;
965 DEBUG(10, ("trying to set acl '%s' on file %s\n", iob.in, name));
967 ret = afs_syscall(AFSCALL_PIOCTL, name, VIOCSETAL, (char *)&iob, 0);
969 if (ret != 0) {
970 DEBUG(10, ("VIOCSETAL returned %d\n", ret));
973 done:
974 free_afs_acl(&dir_acl);
975 free_afs_acl(&file_acl);
976 free_afs_acl(&old_afs_acl);
977 free_afs_acl(&new_afs_acl);
979 return (ret == 0);
982 static size_t afsacl_fget_nt_acl(struct vfs_handle_struct *handle,
983 struct files_struct *fsp,
984 int fd, uint32 security_info,
985 struct security_descriptor **ppdesc)
987 return afs_get_nt_acl(fsp, security_info, ppdesc);
989 static size_t afsacl_get_nt_acl(struct vfs_handle_struct *handle,
990 struct files_struct *fsp,
991 const char *name, uint32 security_info,
992 struct security_descriptor **ppdesc)
994 return afs_get_nt_acl(fsp, security_info, ppdesc);
997 BOOL afsacl_fset_nt_acl(vfs_handle_struct *handle,
998 files_struct *fsp,
999 int fd, uint32 security_info_sent,
1000 SEC_DESC *psd)
1002 return afs_set_nt_acl(handle, fsp, security_info_sent, psd);
1005 BOOL afsacl_set_nt_acl(vfs_handle_struct *handle,
1006 files_struct *fsp,
1007 const char *name, uint32 security_info_sent,
1008 SEC_DESC *psd)
1010 return afs_set_nt_acl(handle, fsp, security_info_sent, psd);
1013 static int afsacl_connect(vfs_handle_struct *handle,
1014 const char *service,
1015 const char *user)
1017 const char *spc;
1019 spc = lp_parm_const_string(SNUM(handle->conn), "afsacl", "space", "%");
1021 if (spc != NULL)
1022 space_replacement = spc[0];
1024 return SMB_VFS_NEXT_CONNECT(handle, service, user);
1027 /* VFS operations structure */
1029 static vfs_op_tuple afsacl_ops[] = {
1030 {SMB_VFS_OP(afsacl_connect), SMB_VFS_OP_CONNECT,
1031 SMB_VFS_LAYER_TRANSPARENT},
1032 {SMB_VFS_OP(afsacl_fget_nt_acl), SMB_VFS_OP_FGET_NT_ACL,
1033 SMB_VFS_LAYER_TRANSPARENT},
1034 {SMB_VFS_OP(afsacl_get_nt_acl), SMB_VFS_OP_GET_NT_ACL,
1035 SMB_VFS_LAYER_TRANSPARENT},
1036 {SMB_VFS_OP(afsacl_fset_nt_acl), SMB_VFS_OP_FSET_NT_ACL,
1037 SMB_VFS_LAYER_TRANSPARENT},
1038 {SMB_VFS_OP(afsacl_set_nt_acl), SMB_VFS_OP_SET_NT_ACL,
1039 SMB_VFS_LAYER_TRANSPARENT},
1040 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
1043 NTSTATUS vfs_afsacl_init(void)
1045 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "afsacl",
1046 afsacl_ops);