source: trunk-3.0/source/modules/vfs_afsacl.c@ 103

Last change on this file since 103 was 39, checked in by Paul Smedley, 18 years ago

Upgrade source to 3.0.25a
File size: 24.8 KB
Line 
1/*
2 * Convert AFS acls to NT acls and vice versa.
3 *
4 * Copyright (C) Volker Lendecke, 2003
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 2 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, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#include "includes.h"
22
23#undef DBGC_CLASS
24#define DBGC_CLASS DBGC_VFS
25
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>
31
32#define MAXSIZE 2048
33
34extern const DOM_SID global_sid_World;
35extern const DOM_SID global_sid_Builtin_Administrators;
36extern const DOM_SID global_sid_Builtin_Backup_Operators;
37extern const DOM_SID global_sid_Authenticated_Users;
38extern const DOM_SID global_sid_NULL;
39
40static char space_replacement = '%';
41
42/* Do we expect SIDs as pts names? */
43static BOOL sidpts;
44
45extern int afs_syscall(int, char *, int, char *, int);
46
47struct afs_ace {
48 BOOL positive;
49 char *name;
50 DOM_SID sid;
51 enum lsa_SidType type;
52 uint32 rights;
53 struct afs_ace *next;
54};
55
56struct afs_acl {
57 TALLOC_CTX *ctx;
58 int type;
59 int num_aces;
60 struct afs_ace *acelist;
61};
62
63struct afs_iob {
64 char *in, *out;
65 uint16 in_size, out_size;
66};
67
68
69static BOOL init_afs_acl(struct afs_acl *acl)
70{
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;
76 }
77 return True;
78}
79
80static void free_afs_acl(struct afs_acl *acl)
81{
82 if (acl->ctx != NULL)
83 talloc_destroy(acl->ctx);
84 acl->ctx = NULL;
85 acl->num_aces = 0;
86 acl->acelist = NULL;
87}
88
89static struct afs_ace *clone_afs_ace(TALLOC_CTX *mem_ctx, struct afs_ace *ace)
90{
91 struct afs_ace *result = TALLOC_P(mem_ctx, struct afs_ace);
92
93 if (result == NULL)
94 return NULL;
95
96 *result = *ace;
97
98 result->next = NULL;
99 result->name = talloc_strdup(mem_ctx, ace->name);
100
101 if (result->name == NULL) {
102 return NULL;
103 }
104
105 return result;
106}
107
108static struct afs_ace *new_afs_ace(TALLOC_CTX *mem_ctx,
109 BOOL positive,
110 const char *name, uint32 rights)
111{
112 DOM_SID sid;
113 enum lsa_SidType type;
114 struct afs_ace *result;
115
116 if (strcmp(name, "system:administrators") == 0) {
117
118 sid_copy(&sid, &global_sid_Builtin_Administrators);
119 type = SID_NAME_ALIAS;
120
121 } else if (strcmp(name, "system:anyuser") == 0) {
122
123 sid_copy(&sid, &global_sid_World);
124 type = SID_NAME_ALIAS;
125
126 } else if (strcmp(name, "system:authuser") == 0) {
127
128 sid_copy(&sid, &global_sid_Authenticated_Users);
129 type = SID_NAME_WKN_GRP;
130
131 } else if (strcmp(name, "system:backup") == 0) {
132
133 sid_copy(&sid, &global_sid_Builtin_Backup_Operators);
134 type = SID_NAME_ALIAS;
135
136 } else if (sidpts) {
137 /* All PTS users/groups are expressed as SIDs */
138
139 sid_copy(&sid, &global_sid_NULL);
140 type = SID_NAME_UNKNOWN;
141
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);
147 }
148
149 } else {
150
151 const char *domain, *uname;
152 char *p;
153
154 p = strchr_m(name, *lp_winbind_separator());
155 if (p != NULL) {
156 *p = '\\';
157 }
158
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));
162
163 sid_copy(&sid, &global_sid_NULL);
164 type = SID_NAME_UNKNOWN;
165
166 }
167 }
168
169 result = TALLOC_P(mem_ctx, struct afs_ace);
170
171 if (result == NULL) {
172 DEBUG(0, ("Could not talloc AFS ace\n"));
173 return NULL;
174 }
175
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;
180 }
181
182 result->sid = sid;
183 result->type = type;
184
185 result->positive = positive;
186 result->rights = rights;
187
188 return result;
189}
190
191static void add_afs_ace(struct afs_acl *acl,
192 BOOL positive,
193 const char *name, uint32 rights)
194{
195 struct afs_ace *ace;
196
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;
202 }
203 }
204
205 ace = new_afs_ace(acl->ctx, positive, name, rights);
206
207 ace->next = acl->acelist;
208 acl->acelist = ace;
209
210 acl->num_aces += 1;
211
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));
215
216 return;
217}
218
219/* AFS ACLs in string form are a long string of fields delimited with \n.
220 *
221 * First line: Number of positive entries
222 * Second line: Number of negative entries
223 * Third and following lines: The entries themselves
224 *
225 * An ACE is a line of two fields, delimited by \t.
226 *
227 * First field: Name
228 * Second field: Rights
229 */
230
231static BOOL parse_afs_acl(struct afs_acl *acl, const char *acl_str)
232{
233 int nplus, nminus;
234 int aces;
235
236 char str[MAXSIZE+1];
237 char *p = str;
238
239 strncpy(str, acl_str, MAXSIZE);
240
241 if (sscanf(p, "%d", &nplus) != 1)
242 return False;
243
244 DEBUG(10, ("Found %d positive entries\n", nplus));
245
246 if ((p = strchr(p, '\n')) == NULL)
247 return False;
248 p += 1;
249
250 if (sscanf(p, "%d", &nminus) != 1)
251 return False;
252
253 DEBUG(10, ("Found %d negative entries\n", nminus));
254
255 if ((p = strchr(p, '\n')) == NULL)
256 return False;
257 p += 1;
258
259 for (aces = nplus+nminus; aces > 0; aces--)
260 {
261
262 const char *namep;
263 fstring name;
264 uint32 rights;
265 char *space;
266
267 namep = p;
268
269 if ((p = strchr(p, '\t')) == NULL)
270 return False;
271 *p = '\0';
272 p += 1;
273
274 if (sscanf(p, "%d", &rights) != 1)
275 return False;
276
277 if ((p = strchr(p, '\n')) == NULL)
278 return False;
279 p += 1;
280
281 fstrcpy(name, namep);
282
283 while ((space = strchr_m(name, space_replacement)) != NULL)
284 *space = ' ';
285
286 add_afs_ace(acl, nplus>0, name, rights);
287
288 nplus -= 1;
289 }
290
291 return True;
292}
293
294static BOOL unparse_afs_acl(struct afs_acl *acl, char *acl_str)
295{
296 /* TODO: String length checks!!!! */
297
298 int positives = 0;
299 int negatives = 0;
300 fstring line;
301
302 *acl_str = 0;
303
304 struct afs_ace *ace = acl->acelist;
305
306 while (ace != NULL) {
307 if (ace->positive)
308 positives++;
309 else
310 negatives++;
311 ace = ace->next;
312 }
313
314 fstr_sprintf(line, "%d\n", positives);
315 safe_strcat(acl_str, line, MAXSIZE);
316
317 fstr_sprintf(line, "%d\n", negatives);
318 safe_strcat(acl_str, line, MAXSIZE);
319
320 ace = acl->acelist;
321
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;
326 }
327 return True;
328}
329
330static uint32 afs_to_nt_file_rights(uint32 rights)
331{
332 uint32 result = 0;
333
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;
338
339 if (rights & PRSFS_WRITE)
340 result |= FILE_WRITE_DATA | FILE_WRITE_ATTRIBUTES |
341 FILE_WRITE_EA | FILE_APPEND_DATA;
342
343 if (rights & PRSFS_LOCK)
344 result |= WRITE_OWNER_ACCESS;
345
346 if (rights & PRSFS_DELETE)
347 result |= DELETE_ACCESS;
348
349 return result;
350}
351
352static void afs_to_nt_dir_rights(uint32 afs_rights, uint32 *nt_rights,
353 uint8 *flag)
354{
355 *nt_rights = 0;
356 *flag = SEC_ACE_FLAG_OBJECT_INHERIT |
357 SEC_ACE_FLAG_CONTAINER_INHERIT;
358
359 if (afs_rights & PRSFS_INSERT)
360 *nt_rights |= FILE_ADD_FILE | FILE_ADD_SUBDIRECTORY;
361
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;
366
367 if (afs_rights & PRSFS_WRITE)
368 *nt_rights |= FILE_WRITE_ATTRIBUTES | FILE_WRITE_DATA |
369 FILE_APPEND_DATA | FILE_WRITE_EA;
370
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;
375
376 if (afs_rights & PRSFS_DELETE)
377 *nt_rights |= DELETE_ACCESS;
378
379 if (afs_rights & PRSFS_ADMINISTER)
380 *nt_rights |= FILE_DELETE_CHILD | WRITE_DAC_ACCESS |
381 WRITE_OWNER_ACCESS;
382
383 if ( (afs_rights & PRSFS_LOOKUP) ==
384 (afs_rights & (PRSFS_LOOKUP|PRSFS_READ)) ) {
385 /* Only lookup right */
386 *flag = SEC_ACE_FLAG_CONTAINER_INHERIT;
387 }
388
389 return;
390}
391
392#define AFS_FILE_RIGHTS (PRSFS_READ|PRSFS_WRITE|PRSFS_LOCK)
393#define AFS_DIR_RIGHTS (PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE|PRSFS_ADMINISTER)
394
395static void split_afs_acl(struct afs_acl *acl,
396 struct afs_acl *dir_acl,
397 struct afs_acl *file_acl)
398{
399 struct afs_ace *ace;
400
401 init_afs_acl(dir_acl);
402 init_afs_acl(file_acl);
403
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);
408 }
409
410 if (ace->rights & AFS_DIR_RIGHTS) {
411 add_afs_ace(dir_acl, ace->positive, ace->name,
412 ace->rights & AFS_DIR_RIGHTS);
413 }
414 }
415 return;
416}
417
418static BOOL same_principal(struct afs_ace *x, struct afs_ace *y)
419{
420 return ( (x->positive == y->positive) &&
421 (sid_compare(&x->sid, &y->sid) == 0) );
422}
423
424static void merge_afs_acls(struct afs_acl *dir_acl,
425 struct afs_acl *file_acl,
426 struct afs_acl *target)
427{
428 struct afs_ace *ace;
429
430 init_afs_acl(target);
431
432 for (ace = dir_acl->acelist; ace != NULL; ace = ace->next) {
433 struct afs_ace *file_ace;
434 BOOL found = False;
435
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;
441
442 add_afs_ace(target, ace->positive, ace->name,
443 ace->rights | file_ace->rights);
444 found = True;
445 break;
446 }
447 if (!found)
448 add_afs_ace(target, ace->positive, ace->name,
449 ace->rights);
450 }
451
452 for (ace = file_acl->acelist; ace != NULL; ace = ace->next) {
453 struct afs_ace *dir_ace;
454 BOOL already_seen = False;
455
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;
463 }
464 if (!already_seen)
465 add_afs_ace(target, ace->positive, ace->name,
466 ace->rights);
467 }
468}
469
470#define PERMS_READ 0x001200a9
471#define PERMS_CHANGE 0x001301bf
472#define PERMS_FULL 0x001f01ff
473
474static struct static_dir_ace_mapping {
475 uint8 type;
476 uint8 flags;
477 uint32 mask;
478 uint32 afs_rights;
479} ace_mappings[] = {
480
481 /* Full control */
482 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
483 PERMS_FULL, 127 /* rlidwka */ },
484
485 /* Change (write) */
486 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
487 PERMS_CHANGE, 63 /* rlidwk */ },
488
489 /* Read (including list folder content) */
490 { 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
491 PERMS_READ, 9 /* rl */ },
492
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 */ },
496
497 /* some stupid workaround for preventing fallbacks */
498 { 0, 0x3, 0x0012019F, 9 /* rl */ },
499 { 0, 0x13, PERMS_FULL, 127 /* full */ },
500
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 */},
507
508 /* List folder */
509 { 0, SEC_ACE_FLAG_CONTAINER_INHERIT,
510 PERMS_READ, 8 /* l */ },
511
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 */ },
515
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 */ },
519
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 */ },
523
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 */ },
527
528 /* End marker, hopefully there's no afs right 9999 :-) */
529 { 0, 0, 0, 9999 }
530};
531
532static uint32 nt_to_afs_dir_rights(const char *filename, const SEC_ACE *ace)
533{
534 uint32 result = 0;
535 uint32 rights = ace->info.mask;
536 uint8 flags = ace->flags;
537
538 struct static_dir_ace_mapping *m;
539
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;
545 }
546
547 DEBUG(1, ("AFSACL FALLBACK: 0x%X 0x%X 0x%X %s %X\n",
548 ace->type, ace->flags, ace->info.mask, filename, rights));
549
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;
554 }
555
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;
560 }
561 }
562
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;
567 }
568 }
569
570 return result;
571}
572
573static uint32 nt_to_afs_file_rights(const char *filename, const SEC_ACE *ace)
574{
575 uint32 result = 0;
576 uint32 rights = ace->info.mask;
577
578 if (rights & (GENERIC_READ_ACCESS|FILE_READ_DATA)) {
579 result |= PRSFS_READ;
580 }
581
582 if (rights & (GENERIC_WRITE_ACCESS|FILE_WRITE_DATA)) {
583 result |= PRSFS_WRITE | PRSFS_LOCK;
584 }
585
586 return result;
587}
588
589static 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)
593{
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();
602
603 struct afs_ace *afs_ace;
604
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;
609 }
610 } else {
611 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
612 return 0;
613 }
614 }
615
616 uid_to_sid(&owner_sid, sbuf.st_uid);
617 gid_to_sid(&group_sid, sbuf.st_gid);
618
619 if (afs_acl->num_aces) {
620 nt_ace_list = TALLOC_ARRAY(mem_ctx, SEC_ACE, afs_acl->num_aces);
621
622 if (nt_ace_list == NULL)
623 return 0;
624 } else {
625 nt_ace_list = NULL;
626 }
627
628 afs_ace = afs_acl->acelist;
629 good_aces = 0;
630
631 while (afs_ace != NULL) {
632 uint32 nt_rights;
633 uint8 flag = SEC_ACE_FLAG_OBJECT_INHERIT |
634 SEC_ACE_FLAG_CONTAINER_INHERIT;
635
636 if (afs_ace->type == SID_NAME_UNKNOWN) {
637 DEBUG(10, ("Ignoring unknown name %s\n",
638 afs_ace->name));
639 afs_ace = afs_ace->next;
640 continue;
641 }
642
643 if (fsp->is_directory)
644 afs_to_nt_dir_rights(afs_ace->rights, &nt_rights,
645 &flag);
646 else
647 nt_rights = afs_to_nt_file_rights(afs_ace->rights);
648
649 init_sec_access(&mask, nt_rights);
650 init_sec_ace(&nt_ace_list[good_aces++], &(afs_ace->sid),
651 SEC_ACE_TYPE_ACCESS_ALLOWED, mask, flag);
652 afs_ace = afs_ace->next;
653 }
654
655 psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION,
656 good_aces, nt_ace_list);
657 if (psa == NULL)
658 return 0;
659
660
661 *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION,
662 SEC_DESC_SELF_RELATIVE,
663 (security_info & OWNER_SECURITY_INFORMATION)
664 ? &owner_sid : NULL,
665 (security_info & GROUP_SECURITY_INFORMATION)
666 ? &group_sid : NULL,
667 NULL, psa, &sd_size);
668
669 return sd_size;
670}
671
672static BOOL mappable_sid(const DOM_SID *sid)
673{
674 DOM_SID domain_sid;
675
676 if (sid_compare(sid, &global_sid_Builtin_Administrators) == 0)
677 return True;
678
679 if (sid_compare(sid, &global_sid_World) == 0)
680 return True;
681
682 if (sid_compare(sid, &global_sid_Authenticated_Users) == 0)
683 return True;
684
685 if (sid_compare(sid, &global_sid_Builtin_Backup_Operators) == 0)
686 return True;
687
688 string_to_sid(&domain_sid, "S-1-5-21");
689
690 if (sid_compare_domain(sid, &domain_sid) == 0)
691 return True;
692
693 return False;
694}
695
696static BOOL nt_to_afs_acl(const char *filename,
697 uint32 security_info_sent,
698 struct security_descriptor *psd,
699 uint32 (*nt_to_afs_rights)(const char *filename,
700 const SEC_ACE *ace),
701 struct afs_acl *afs_acl)
702{
703 SEC_ACL *dacl;
704 int i;
705
706 /* Currently we *only* look at the dacl */
707
708 if (((security_info_sent & DACL_SECURITY_INFORMATION) == 0) ||
709 (psd->dacl == NULL))
710 return True;
711
712 if (!init_afs_acl(afs_acl))
713 return False;
714
715 dacl = psd->dacl;
716
717 for (i = 0; i < dacl->num_aces; i++) {
718 SEC_ACE *ace = &(dacl->ace[i]);
719 const char *dom_name, *name;
720 enum lsa_SidType name_type;
721 char *p;
722
723 if (ace->type != SEC_ACE_TYPE_ACCESS_ALLOWED) {
724 /* First cut: Only positive ACEs */
725 return False;
726 }
727
728 if (!mappable_sid(&ace->trustee)) {
729 DEBUG(10, ("Ignoring unmappable SID %s\n",
730 sid_string_static(&ace->trustee)));
731 continue;
732 }
733
734 if (sid_compare(&ace->trustee,
735 &global_sid_Builtin_Administrators) == 0) {
736
737 name = "system:administrators";
738
739 } else if (sid_compare(&ace->trustee,
740 &global_sid_World) == 0) {
741
742 name = "system:anyuser";
743
744 } else if (sid_compare(&ace->trustee,
745 &global_sid_Authenticated_Users) == 0) {
746
747 name = "system:authuser";
748
749 } else if (sid_compare(&ace->trustee,
750 &global_sid_Builtin_Backup_Operators)
751 == 0) {
752
753 name = "system:backup";
754
755 } else {
756
757 if (!lookup_sid(tmp_talloc_ctx(), &ace->trustee,
758 &dom_name, &name, &name_type)) {
759 DEBUG(1, ("AFSACL: Could not lookup SID %s on file %s\n",
760 sid_string_static(&ace->trustee), filename));
761 continue;
762 }
763
764 if ( (name_type == SID_NAME_USER) ||
765 (name_type == SID_NAME_DOM_GRP) ||
766 (name_type == SID_NAME_ALIAS) ) {
767 char *tmp;
768 tmp = talloc_asprintf(tmp_talloc_ctx(), "%s%s%s",
769 dom_name, lp_winbind_separator(),
770 name);
771 if (tmp == NULL) {
772 return False;
773 }
774 strlower_m(tmp);
775 name = tmp;
776 }
777
778 if (sidpts) {
779 /* Expect all users/groups in pts as SIDs */
780 name = talloc_strdup(
781 tmp_talloc_ctx(),
782 sid_string_static(&ace->trustee));
783 if (name == NULL) {
784 return False;
785 }
786 }
787 }
788
789 while ((p = strchr_m(name, ' ')) != NULL)
790 *p = space_replacement;
791
792 add_afs_ace(afs_acl, True, name,
793 nt_to_afs_rights(filename, ace));
794 }
795
796 return True;
797}
798
799static BOOL afs_get_afs_acl(char *filename, struct afs_acl *acl)
800{
801 struct afs_iob iob;
802
803 int ret;
804
805 char space[MAXSIZE];
806
807 DEBUG(5, ("afs_get_afs_acl: %s\n", filename));
808
809 iob.in_size = 0;
810 iob.out_size = MAXSIZE;
811 iob.in = iob.out = space;
812
813 ret = afs_syscall(AFSCALL_PIOCTL, filename, VIOCGETAL,
814 (char *)&iob, 0);
815
816 if (ret) {
817 DEBUG(1, ("got error from PIOCTL: %d\n", ret));
818 return False;
819 }
820
821 if (!init_afs_acl(acl))
822 return False;
823
824 if (!parse_afs_acl(acl, space)) {
825 DEBUG(1, ("Could not parse AFS acl\n"));
826 free_afs_acl(acl);
827 return False;
828 }
829
830 return True;
831}
832
833static size_t afs_get_nt_acl(struct files_struct *fsp, uint32 security_info,
834 struct security_descriptor **ppdesc)
835{
836 struct afs_acl acl;
837 size_t sd_size;
838
839 DEBUG(5, ("afs_get_nt_acl: %s\n", fsp->fsp_name));
840
841 sidpts = lp_parm_bool(SNUM(fsp->conn), "afsacl", "sidpts", False);
842
843 if (!afs_get_afs_acl(fsp->fsp_name, &acl)) {
844 return 0;
845 }
846
847 sd_size = afs_to_nt_acl(&acl, fsp, security_info, ppdesc);
848
849 free_afs_acl(&acl);
850
851 return sd_size;
852}
853
854/* For setting an AFS ACL we have to take care of the ACEs we could
855 * not properly map to SIDs. Merge all of them into the new ACL. */
856
857static void merge_unknown_aces(struct afs_acl *src, struct afs_acl *dst)
858{
859 struct afs_ace *ace;
860
861 for (ace = src->acelist; ace != NULL; ace = ace->next)
862 {
863 struct afs_ace *copy;
864
865 if (ace->type != SID_NAME_UNKNOWN) {
866 DEBUG(10, ("Not merging known ACE for %s\n",
867 ace->name));
868 continue;
869 }
870
871 DEBUG(10, ("Merging unknown ACE for %s\n", ace->name));
872
873 copy = clone_afs_ace(dst->ctx, ace);
874
875 if (copy == NULL) {
876 DEBUG(0, ("Could not clone ACE for %s\n", ace->name));
877 continue;
878 }
879
880 copy->next = dst->acelist;
881 dst->acelist = copy;
882 dst->num_aces += 1;
883 }
884}
885
886static BOOL afs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
887 uint32 security_info_sent,
888 struct security_descriptor *psd)
889{
890 struct afs_acl old_afs_acl, new_afs_acl;
891 struct afs_acl dir_acl, file_acl;
892 char acl_string[2049];
893 struct afs_iob iob;
894 int ret = -1;
895 pstring name;
896 const char *fileacls;
897
898 fileacls = lp_parm_const_string(SNUM(handle->conn), "afsacl", "fileacls",
899 "yes");
900
901 sidpts = lp_parm_bool(SNUM(handle->conn), "afsacl", "sidpts", False);
902
903 ZERO_STRUCT(old_afs_acl);
904 ZERO_STRUCT(new_afs_acl);
905 ZERO_STRUCT(dir_acl);
906 ZERO_STRUCT(file_acl);
907
908 pstrcpy(name, fsp->fsp_name);
909
910 if (!fsp->is_directory) {
911 /* We need to get the name of the directory containing the
912 * file, this is where the AFS acls live */
913 char *p = strrchr(name, '/');
914 if (p != NULL) {
915 *p = '\0';
916 } else {
917 pstrcpy(name, ".");
918 }
919 }
920
921 if (!afs_get_afs_acl(name, &old_afs_acl)) {
922 DEBUG(3, ("Could not get old ACL of %s\n", fsp->fsp_name));
923 goto done;
924 }
925
926 split_afs_acl(&old_afs_acl, &dir_acl, &file_acl);
927
928 if (fsp->is_directory) {
929
930 if (!strequal(fileacls, "yes")) {
931 /* Throw away file acls, we depend on the
932 * inheritance ACEs that also give us file
933 * permissions */
934 free_afs_acl(&file_acl);
935 }
936
937 free_afs_acl(&dir_acl);
938 if (!nt_to_afs_acl(fsp->fsp_name, security_info_sent, psd,
939 nt_to_afs_dir_rights, &dir_acl))
940 goto done;
941 } else {
942 if (strequal(fileacls, "no")) {
943 ret = -1;
944 goto done;
945 }
946
947 if (strequal(fileacls, "ignore")) {
948 ret = 0;
949 goto done;
950 }
951
952 free_afs_acl(&file_acl);
953 if (!nt_to_afs_acl(fsp->fsp_name, security_info_sent, psd,
954 nt_to_afs_file_rights, &file_acl))
955 goto done;
956 }
957
958 merge_afs_acls(&dir_acl, &file_acl, &new_afs_acl);
959
960 merge_unknown_aces(&old_afs_acl, &new_afs_acl);
961
962 unparse_afs_acl(&new_afs_acl, acl_string);
963
964 iob.in = acl_string;
965 iob.in_size = 1+strlen(iob.in);
966 iob.out = NULL;
967 iob.out_size = 0;
968
969 DEBUG(10, ("trying to set acl '%s' on file %s\n", iob.in, name));
970
971 ret = afs_syscall(AFSCALL_PIOCTL, name, VIOCSETAL, (char *)&iob, 0);
972
973 if (ret != 0) {
974 DEBUG(10, ("VIOCSETAL returned %d\n", ret));
975 }
976
977 done:
978 free_afs_acl(&dir_acl);
979 free_afs_acl(&file_acl);
980 free_afs_acl(&old_afs_acl);
981 free_afs_acl(&new_afs_acl);
982
983 return (ret == 0);
984}
985
986static size_t afsacl_fget_nt_acl(struct vfs_handle_struct *handle,
987 struct files_struct *fsp,
988 int fd, uint32 security_info,
989 struct security_descriptor **ppdesc)
990{
991 return afs_get_nt_acl(fsp, security_info, ppdesc);
992}
993static size_t afsacl_get_nt_acl(struct vfs_handle_struct *handle,
994 struct files_struct *fsp,
995 const char *name, uint32 security_info,
996 struct security_descriptor **ppdesc)
997{
998 return afs_get_nt_acl(fsp, security_info, ppdesc);
999}
1000
1001BOOL afsacl_fset_nt_acl(vfs_handle_struct *handle,
1002 files_struct *fsp,
1003 int fd, uint32 security_info_sent,
1004 SEC_DESC *psd)
1005{
1006 return afs_set_nt_acl(handle, fsp, security_info_sent, psd);
1007}
1008
1009BOOL afsacl_set_nt_acl(vfs_handle_struct *handle,
1010 files_struct *fsp,
1011 const char *name, uint32 security_info_sent,
1012 SEC_DESC *psd)
1013{
1014 return afs_set_nt_acl(handle, fsp, security_info_sent, psd);
1015}
1016
1017static int afsacl_connect(vfs_handle_struct *handle,
1018 const char *service,
1019 const char *user)
1020{
1021 const char *spc;
1022
1023 spc = lp_parm_const_string(SNUM(handle->conn), "afsacl", "space", "%");
1024
1025 if (spc != NULL)
1026 space_replacement = spc[0];
1027
1028 return SMB_VFS_NEXT_CONNECT(handle, service, user);
1029}
1030
1031/* VFS operations structure */
1032
1033static vfs_op_tuple afsacl_ops[] = {
1034 {SMB_VFS_OP(afsacl_connect), SMB_VFS_OP_CONNECT,
1035 SMB_VFS_LAYER_TRANSPARENT},
1036 {SMB_VFS_OP(afsacl_fget_nt_acl), SMB_VFS_OP_FGET_NT_ACL,
1037 SMB_VFS_LAYER_TRANSPARENT},
1038 {SMB_VFS_OP(afsacl_get_nt_acl), SMB_VFS_OP_GET_NT_ACL,
1039 SMB_VFS_LAYER_TRANSPARENT},
1040 {SMB_VFS_OP(afsacl_fset_nt_acl), SMB_VFS_OP_FSET_NT_ACL,
1041 SMB_VFS_LAYER_TRANSPARENT},
1042 {SMB_VFS_OP(afsacl_set_nt_acl), SMB_VFS_OP_SET_NT_ACL,
1043 SMB_VFS_LAYER_TRANSPARENT},
1044 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
1045};
1046
1047NTSTATUS vfs_afsacl_init(void);
1048NTSTATUS vfs_afsacl_init(void)
1049{
1050 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "afsacl",
1051 afsacl_ops);
1052}
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