1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 1993, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2016 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*LINTLIBRARY*/
27
28 #include <grp.h>
29 #include <pwd.h>
30 #include <string.h>
31 #include <limits.h>
32 #include <stdlib.h>
33 #include <errno.h>
34 #include <sys/param.h>
35 #include <sys/types.h>
36 #include <sys/stat.h>
37 #include <sys/acl.h>
38 #include <aclutils.h>
39 #include <idmap.h>
40 #include <synch.h>
41
42 #define ID_STR_MAX 20 /* digits in LONG_MAX */
43
44 #define APPENDED_ID_MAX ID_STR_MAX + 1 /* id + colon */
45 /*
46 * yyinteractive controls whether yyparse should print out
47 * error messages to stderr, and whether or not id's should be
48 * allowed from acl_fromtext().
49 */
50 int yyinteractive;
51 acl_t *yyacl;
52 char *yybuf;
53 mutex_t yymutex;
54
55 extern acl_t *acl_alloc(enum acl_type);
56
57 /*
58 * dynamic string that will increase in size on an
59 * as needed basis.
60 */
61 typedef struct dynaclstr {
62 size_t d_bufsize; /* current size of aclexport */
63 char *d_aclexport;
64 int d_pos;
65 } dynaclstr_t;
66
67 static int str_append(dynaclstr_t *, char *);
68 static int aclent_perm_txt(dynaclstr_t *, o_mode_t);
69
70 static void
71 aclent_perms(int perm, char *txt_perms)
72 {
73 if (perm & S_IROTH)
74 txt_perms[0] = 'r';
75 else
76 txt_perms[0] = '-';
77 if (perm & S_IWOTH)
78 txt_perms[1] = 'w';
79 else
80 txt_perms[1] = '-';
81 if (perm & S_IXOTH)
82 txt_perms[2] = 'x';
83 else
84 txt_perms[2] = '-';
85 txt_perms[3] = '\0';
86 }
87
88 static char *
89 pruname(uid_t uid, char *uidp, size_t buflen, int noresolve)
90 {
91 struct passwd *passwdp = NULL;
92
93 if (noresolve == 0)
94 passwdp = getpwuid(uid);
95 if (passwdp == (struct passwd *)NULL) {
96 /* could not get passwd information: display uid instead */
97 (void) snprintf(uidp, buflen, "%u", uid);
98 } else {
99 (void) strlcpy(uidp, passwdp->pw_name, buflen);
100 }
101 return (uidp);
102 }
103
104 static char *
105 prgname(gid_t gid, char *gidp, size_t buflen, int noresolve)
106 {
107 struct group *groupp = NULL;
108
109 if (noresolve == 0)
110 groupp = getgrgid(gid);
111 if (groupp == (struct group *)NULL) {
112 /* could not get group information: display gid instead */
113 (void) snprintf(gidp, buflen, "%u", gid);
114 } else {
115 (void) strlcpy(gidp, groupp->gr_name, buflen);
116 }
117 return (gidp);
118 }
119
120 static int
121 getsidname(uid_t who, boolean_t user, char **sidp, boolean_t noresolve)
122 {
123 idmap_get_handle_t *get_hdl = NULL;
124 idmap_stat status;
125 idmap_rid_t rid;
126 int error = IDMAP_ERR_NORESULT;
127 int len;
128 char *domain = NULL;
129
130 *sidp = NULL;
131
132 /*
133 * First try and get windows name
134 */
135
136 if (!noresolve) {
137 if (user)
138 error = idmap_getwinnamebyuid(who,
139 IDMAP_REQ_FLG_USE_CACHE, sidp, NULL);
140 else
141 error = idmap_getwinnamebygid(who,
142 IDMAP_REQ_FLG_USE_CACHE, sidp, NULL);
143 }
144 if (error != IDMAP_SUCCESS) {
145 if (idmap_get_create(&get_hdl) == IDMAP_SUCCESS) {
146 if (user)
147 error = idmap_get_sidbyuid(get_hdl, who,
148 IDMAP_REQ_FLG_USE_CACHE, &domain, &rid,
149 &status);
150 else
151 error = idmap_get_sidbygid(get_hdl, who,
152 IDMAP_REQ_FLG_USE_CACHE, &domain, &rid,
153 &status);
154 if (error == IDMAP_SUCCESS &&
155 idmap_get_mappings(get_hdl) == 0) {
156 if (status == IDMAP_SUCCESS) {
157 len = snprintf(NULL, 0,
158 "%s-%d", domain, rid);
159 if (*sidp = malloc(len + 1)) {
160 (void) snprintf(*sidp, len + 1,
161 "%s-%d", domain, rid);
162 }
163 }
164 }
165 }
166 if (get_hdl)
167 idmap_get_destroy(get_hdl);
168 }
169
170 free(domain);
171
172 return (*sidp ? 0 : 1);
173 }
174
175 /*
176 * sid_string_by_id() is an exposed interface via -lsec
177 */
178 int
179 sid_string_by_id(uid_t who, boolean_t user, char **sidp, boolean_t noresolve)
180 {
181 return (getsidname(who, user, sidp, noresolve));
182 }
183
184 static void
185 aclent_printacl(acl_t *aclp)
186 {
187 aclent_t *tp;
188 int aclcnt;
189 int mask;
190 int slot = 0;
191 char perm[4];
192 char uidp[ID_STR_MAX];
193 char gidp[ID_STR_MAX];
194
195 /* display ACL: assume it is sorted. */
196 aclcnt = aclp->acl_cnt;
197 for (tp = aclp->acl_aclp; tp && aclcnt--; tp++) {
198 if (tp->a_type == CLASS_OBJ)
199 mask = tp->a_perm;
200 }
201 aclcnt = aclp->acl_cnt;
202 for (tp = aclp->acl_aclp; aclcnt--; tp++) {
203 (void) printf(" %d:", slot++);
204 switch (tp->a_type) {
205 case USER:
206 aclent_perms(tp->a_perm, perm);
207 (void) printf("user:%s:%s\t\t",
208 pruname(tp->a_id, uidp, sizeof (uidp), 0), perm);
209 aclent_perms((tp->a_perm & mask), perm);
210 (void) printf("#effective:%s\n", perm);
211 break;
212 case USER_OBJ:
213 /* no need to display uid */
214 aclent_perms(tp->a_perm, perm);
215 (void) printf("user::%s\n", perm);
216 break;
217 case GROUP:
218 aclent_perms(tp->a_perm, perm);
219 (void) printf("group:%s:%s\t\t",
220 prgname(tp->a_id, gidp, sizeof (gidp), 0), perm);
221 aclent_perms(tp->a_perm & mask, perm);
222 (void) printf("#effective:%s\n", perm);
223 break;
224 case GROUP_OBJ:
225 aclent_perms(tp->a_perm, perm);
226 (void) printf("group::%s\t\t", perm);
227 aclent_perms(tp->a_perm & mask, perm);
228 (void) printf("#effective:%s\n", perm);
229 break;
230 case CLASS_OBJ:
231 aclent_perms(tp->a_perm, perm);
232 (void) printf("mask:%s\n", perm);
233 break;
234 case OTHER_OBJ:
235 aclent_perms(tp->a_perm, perm);
236 (void) printf("other:%s\n", perm);
237 break;
238 case DEF_USER:
239 aclent_perms(tp->a_perm, perm);
240 (void) printf("default:user:%s:%s\n",
241 pruname(tp->a_id, uidp, sizeof (uidp), 0), perm);
242 break;
243 case DEF_USER_OBJ:
244 aclent_perms(tp->a_perm, perm);
245 (void) printf("default:user::%s\n", perm);
246 break;
247 case DEF_GROUP:
248 aclent_perms(tp->a_perm, perm);
249 (void) printf("default:group:%s:%s\n",
250 prgname(tp->a_id, gidp, sizeof (gidp), 0), perm);
251 break;
252 case DEF_GROUP_OBJ:
253 aclent_perms(tp->a_perm, perm);
254 (void) printf("default:group::%s\n", perm);
255 break;
256 case DEF_CLASS_OBJ:
257 aclent_perms(tp->a_perm, perm);
258 (void) printf("default:mask:%s\n", perm);
259 break;
260 case DEF_OTHER_OBJ:
261 aclent_perms(tp->a_perm, perm);
262 (void) printf("default:other:%s\n", perm);
263 break;
264 default:
265 (void) fprintf(stderr,
266 dgettext(TEXT_DOMAIN, "unrecognized entry\n"));
267 break;
268 }
269 }
270 }
271
272 static void
273 split_line(char *str, int cols)
274 {
275 char *ptr;
276 int len;
277 int i;
278 int last_split;
279 char *pad = "";
280 int pad_len;
281
282 len = strlen(str);
283 ptr = str;
284 pad_len = 0;
285
286 ptr = str;
287 last_split = 0;
288 for (i = 0; i != len; i++) {
289 if ((i + pad_len + 4) >= cols) {
290 (void) printf("%s%.*s\n", pad, last_split, ptr);
291 ptr = &ptr[last_split];
292 len = strlen(ptr);
293 i = 0;
294 pad_len = 4;
295 pad = " ";
296 } else {
297 if (ptr[i] == '/' || ptr[i] == ':') {
298 last_split = i;
299 }
300 }
301 }
302 if (i == len) {
303 (void) printf("%s%s\n", pad, ptr);
304 }
305 }
306
307 /*
308 * compute entry type string, such as user:joe, group:staff,...
309 */
310 static int
311 aclent_type_txt(dynaclstr_t *dstr, aclent_t *aclp, int flags)
312 {
313 char idp[ID_STR_MAX];
314 int error;
315
316 switch (aclp->a_type) {
317 case DEF_USER_OBJ:
318 case USER_OBJ:
319 if (aclp->a_type == USER_OBJ)
320 error = str_append(dstr, "user::");
321 else
322 error = str_append(dstr, "defaultuser::");
323 break;
324
325 case DEF_USER:
326 case USER:
327 if (aclp->a_type == USER)
328 error = str_append(dstr, "user:");
329 else
330 error = str_append(dstr, "defaultuser:");
331 if (error)
332 break;
333 error = str_append(dstr, pruname(aclp->a_id, idp,
334 sizeof (idp), flags & ACL_NORESOLVE));
335 if (error == 0)
336 error = str_append(dstr, ":");
337 break;
338
339 case DEF_GROUP_OBJ:
340 case GROUP_OBJ:
341 if (aclp->a_type == GROUP_OBJ)
342 error = str_append(dstr, "group::");
343 else
344 error = str_append(dstr, "defaultgroup::");
345 break;
346
347 case DEF_GROUP:
348 case GROUP:
349 if (aclp->a_type == GROUP)
350 error = str_append(dstr, "group:");
351 else
352 error = str_append(dstr, "defaultgroup:");
353 if (error)
354 break;
355 error = str_append(dstr, prgname(aclp->a_id, idp,
356 sizeof (idp), flags & ACL_NORESOLVE));
357 if (error == 0)
358 error = str_append(dstr, ":");
359 break;
360
361 case DEF_CLASS_OBJ:
362 case CLASS_OBJ:
363 if (aclp->a_type == CLASS_OBJ)
364 error = str_append(dstr, "mask:");
365 else
366 error = str_append(dstr, "defaultmask:");
367 break;
368
369 case DEF_OTHER_OBJ:
370 case OTHER_OBJ:
371 if (aclp->a_type == OTHER_OBJ)
372 error = str_append(dstr, "other:");
373 else
374 error = str_append(dstr, "defaultother:");
375 break;
376
377 default:
378 error = 1;
379 break;
380 }
381
382 return (error);
383 }
384
385 /*
386 * compute entry type string such as, owner@:, user:joe, group:staff,...
387 */
388 static int
389 ace_type_txt(dynaclstr_t *dynstr, ace_t *acep, int flags)
390 {
391 char idp[ID_STR_MAX];
392 int error;
393 char *sidp = NULL;
394
395 switch (acep->a_flags & ACE_TYPE_FLAGS) {
396 case ACE_OWNER:
397 error = str_append(dynstr, OWNERAT_TXT);
398 break;
399
400 case ACE_GROUP|ACE_IDENTIFIER_GROUP:
401 error = str_append(dynstr, GROUPAT_TXT);
402 break;
403
404 case ACE_IDENTIFIER_GROUP:
405 if ((flags & ACL_SID_FMT) && acep->a_who > MAXUID) {
406 if (error = str_append(dynstr,
407 GROUPSID_TXT))
408 break;
409 if (error = getsidname(acep->a_who, B_FALSE,
410 &sidp, flags & ACL_NORESOLVE))
411 break;
412 error = str_append(dynstr, sidp);
413 } else {
414 if (error = str_append(dynstr, GROUP_TXT))
415 break;
416 error = str_append(dynstr, prgname(acep->a_who, idp,
417 sizeof (idp), flags & ACL_NORESOLVE));
418 }
419 if (error == 0)
420 error = str_append(dynstr, ":");
421 break;
422
423 case ACE_EVERYONE:
424 error = str_append(dynstr, EVERYONEAT_TXT);
425 break;
426
427 case 0:
428 if ((flags & ACL_SID_FMT) && acep->a_who > MAXUID &&
429 (flags & ACL_EPHEMERAL) == 0) {
430 if (error = str_append(dynstr, USERSID_TXT))
431 break;
432 if (error = getsidname(acep->a_who, B_TRUE,
433 &sidp, flags & ACL_NORESOLVE))
434 break;
435 error = str_append(dynstr, sidp);
436 } else {
437 flags &= ~ACL_NORESOLVE;
438 if (error = str_append(dynstr, USER_TXT))
439 break;
440 error = str_append(dynstr, pruname(acep->a_who, idp,
441 sizeof (idp), flags & ACL_NORESOLVE));
442 }
443 if (error == 0)
444 error = str_append(dynstr, ":");
445 break;
446 default:
447 error = 0;
448 break;
449 }
450
451 if (sidp)
452 free(sidp);
453 return (error);
454 }
455
456 /*
457 * compute string of permissions, such as read_data/write_data or
458 * rwxp,...
459 * The format depends on the flags field which indicates whether the compact
460 * or verbose format should be used.
461 */
462 static int
463 ace_perm_txt(dynaclstr_t *dstr, uint32_t mask,
464 uint32_t iflags, int isdir, int flags)
465 {
466 int error = 0;
467
468 if (flags & ACL_COMPACT_FMT) {
469 char buf[16];
470
471 if (mask & ACE_READ_DATA)
472 buf[0] = 'r';
473 else
474 buf[0] = '-';
475 if (mask & ACE_WRITE_DATA)
476 buf[1] = 'w';
477 else
478 buf[1] = '-';
479 if (mask & ACE_EXECUTE)
480 buf[2] = 'x';
481 else
482 buf[2] = '-';
483 if (mask & ACE_APPEND_DATA)
484 buf[3] = 'p';
485 else
486 buf[3] = '-';
487 if (mask & ACE_DELETE)
488 buf[4] = 'd';
489 else
490 buf[4] = '-';
491 if (mask & ACE_DELETE_CHILD)
492 buf[5] = 'D';
493 else
494 buf[5] = '-';
495 if (mask & ACE_READ_ATTRIBUTES)
496 buf[6] = 'a';
497 else
498 buf[6] = '-';
499 if (mask & ACE_WRITE_ATTRIBUTES)
500 buf[7] = 'A';
501 else
502 buf[7] = '-';
503 if (mask & ACE_READ_NAMED_ATTRS)
504 buf[8] = 'R';
505 else
506 buf[8] = '-';
507 if (mask & ACE_WRITE_NAMED_ATTRS)
508 buf[9] = 'W';
509 else
510 buf[9] = '-';
511 if (mask & ACE_READ_ACL)
512 buf[10] = 'c';
513 else
514 buf[10] = '-';
515 if (mask & ACE_WRITE_ACL)
516 buf[11] = 'C';
517 else
518 buf[11] = '-';
519 if (mask & ACE_WRITE_OWNER)
520 buf[12] = 'o';
521 else
522 buf[12] = '-';
523 if (mask & ACE_SYNCHRONIZE)
524 buf[13] = 's';
525 else
526 buf[13] = '-';
527 buf[14] = ':';
528 buf[15] = '\0';
529 error = str_append(dstr, buf);
530 } else {
531 /*
532 * If ACE is a directory, but inheritance indicates its
533 * for a file then print permissions for file rather than
534 * dir.
535 */
536 if (isdir) {
537 if (mask & ACE_LIST_DIRECTORY) {
538 if (iflags == ACE_FILE_INHERIT_ACE) {
539 error = str_append(dstr,
540 READ_DATA_TXT);
541 } else {
542 error =
543 str_append(dstr, READ_DIR_TXT);
544 }
545 }
546 if (error == 0 && (mask & ACE_ADD_FILE)) {
547 if (iflags == ACE_FILE_INHERIT_ACE) {
548 error =
549 str_append(dstr, WRITE_DATA_TXT);
550 } else {
551 error =
552 str_append(dstr, ADD_FILE_TXT);
553 }
554 }
555 if (error == 0 && (mask & ACE_ADD_SUBDIRECTORY)) {
556 if (iflags == ACE_FILE_INHERIT_ACE) {
557 error = str_append(dstr,
558 APPEND_DATA_TXT);
559 } else {
560 error = str_append(dstr,
561 ADD_DIR_TXT);
562 }
563 }
564 } else {
565 if (mask & ACE_READ_DATA) {
566 error = str_append(dstr, READ_DATA_TXT);
567 }
568 if (error == 0 && (mask & ACE_WRITE_DATA)) {
569 error = str_append(dstr, WRITE_DATA_TXT);
570 }
571 if (error == 0 && (mask & ACE_APPEND_DATA)) {
572 error = str_append(dstr, APPEND_DATA_TXT);
573 }
574 }
575 if (error == 0 && (mask & ACE_READ_NAMED_ATTRS)) {
576 error = str_append(dstr, READ_XATTR_TXT);
577 }
578 if (error == 0 && (mask & ACE_WRITE_NAMED_ATTRS)) {
579 error = str_append(dstr, WRITE_XATTR_TXT);
580 }
581 if (error == 0 && (mask & ACE_EXECUTE)) {
582 error = str_append(dstr, EXECUTE_TXT);
583 }
584 if (error == 0 && (mask & ACE_DELETE_CHILD)) {
585 error = str_append(dstr, DELETE_CHILD_TXT);
586 }
587 if (error == 0 && (mask & ACE_READ_ATTRIBUTES)) {
588 error = str_append(dstr, READ_ATTRIBUTES_TXT);
589 }
590 if (error == 0 && (mask & ACE_WRITE_ATTRIBUTES)) {
591 error = str_append(dstr, WRITE_ATTRIBUTES_TXT);
592 }
593 if (error == 0 && (mask & ACE_DELETE)) {
594 error = str_append(dstr, DELETE_TXT);
595 }
596 if (error == 0 && (mask & ACE_READ_ACL)) {
597 error = str_append(dstr, READ_ACL_TXT);
598 }
599 if (error == 0 && (mask & ACE_WRITE_ACL)) {
600 error = str_append(dstr, WRITE_ACL_TXT);
601 }
602 if (error == 0 && (mask & ACE_WRITE_OWNER)) {
603 error = str_append(dstr, WRITE_OWNER_TXT);
604 }
605 if (error == 0 && (mask & ACE_SYNCHRONIZE)) {
606 error = str_append(dstr, SYNCHRONIZE_TXT);
607 }
608 if (error == 0 && dstr->d_aclexport[dstr->d_pos-1] == '/') {
609 dstr->d_aclexport[--dstr->d_pos] = '\0';
610 }
611 if (error == 0)
612 error = str_append(dstr, ":");
613 }
614 return (error);
615 }
616
617 /*
618 * compute string of access type, such as allow, deny, ...
619 */
620 static int
621 ace_access_txt(dynaclstr_t *dstr, int type)
622 {
623 int error;
624
625 if (type == ACE_ACCESS_ALLOWED_ACE_TYPE)
626 error = str_append(dstr, ALLOW_TXT);
627 else if (type == ACE_ACCESS_DENIED_ACE_TYPE)
628 error = str_append(dstr, DENY_TXT);
629 else if (type == ACE_SYSTEM_AUDIT_ACE_TYPE)
630 error = str_append(dstr, AUDIT_TXT);
631 else if (type == ACE_SYSTEM_ALARM_ACE_TYPE)
632 error = str_append(dstr, ALARM_TXT);
633 else
634 error = str_append(dstr, UNKNOWN_TXT);
635
636 return (error);
637 }
638
639 static int
640 ace_inherit_txt(dynaclstr_t *dstr, uint32_t iflags, int flags)
641 {
642 int error = 0;
643
644 if (flags & ACL_COMPACT_FMT) {
645 char buf[9];
646
647 if (iflags & ACE_FILE_INHERIT_ACE)
648 buf[0] = 'f';
649 else
650 buf[0] = '-';
651 if (iflags & ACE_DIRECTORY_INHERIT_ACE)
652 buf[1] = 'd';
653 else
654 buf[1] = '-';
655 if (iflags & ACE_INHERIT_ONLY_ACE)
656 buf[2] = 'i';
657 else
658 buf[2] = '-';
659 if (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)
660 buf[3] = 'n';
661 else
662 buf[3] = '-';
663 if (iflags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
664 buf[4] = 'S';
665 else
666 buf[4] = '-';
667 if (iflags & ACE_FAILED_ACCESS_ACE_FLAG)
668 buf[5] = 'F';
669 else
670 buf[5] = '-';
671 if (iflags & ACE_INHERITED_ACE)
672 buf[6] = 'I';
673 else
674 buf[6] = '-';
675 buf[7] = ':';
676 buf[8] = '\0';
677 error = str_append(dstr, buf);
678 } else {
679 if (iflags & ACE_FILE_INHERIT_ACE) {
680 error = str_append(dstr, FILE_INHERIT_TXT);
681 }
682 if (error == 0 && (iflags & ACE_DIRECTORY_INHERIT_ACE)) {
683 error = str_append(dstr, DIR_INHERIT_TXT);
684 }
685 if (error == 0 && (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)) {
686 error = str_append(dstr, NO_PROPAGATE_TXT);
687 }
688 if (error == 0 && (iflags & ACE_INHERIT_ONLY_ACE)) {
689 error = str_append(dstr, INHERIT_ONLY_TXT);
690 }
691 if (error == 0 && (iflags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)) {
692 error = str_append(dstr, SUCCESSFUL_ACCESS_TXT);
693 }
694 if (error == 0 && (iflags & ACE_FAILED_ACCESS_ACE_FLAG)) {
695 error = str_append(dstr, FAILED_ACCESS_TXT);
696 }
697 if (error == 0 && (iflags & ACE_INHERITED_ACE)) {
698 error = str_append(dstr, INHERITED_ACE_TXT);
699 }
700 if (error == 0 && dstr->d_aclexport[dstr->d_pos-1] == '/') {
701 dstr->d_aclexport[--dstr->d_pos] = '\0';
702 error = str_append(dstr, ":");
703 }
704 }
705
706 return (error);
707 }
708
709 /*
710 * Convert internal acl representation to external representation.
711 *
712 * The length of a non-owning user name or non-owning group name ie entries
713 * of type DEF_USER, USER, DEF_GROUP or GROUP, can exceed LOGNAME_MAX. We
714 * thus check the length of these entries, and if greater than LOGNAME_MAX,
715 * we realloc() via increase_length().
716 *
717 * The LOGNAME_MAX, ENTRYTYPELEN and PERMS limits are otherwise always
718 * adhered to.
719 */
720
721 /*
722 * acltotext() converts each ACL entry to look like this:
723 *
724 * entry_type:uid^gid^name:perms[:id]
725 *
726 * The maximum length of entry_type is 14 ("defaultgroup::" and
727 * "defaultother::") hence ENTRYTYPELEN is set to 14.
728 *
729 * The max length of a uid^gid^name entry (in theory) is 8, hence we use,
730 * however the ID could be a number so we therefore use ID_STR_MAX
731 *
732 * The length of a perms entry is 4 to allow for the comma appended to each
733 * to each acl entry. Hence PERMS is set to 4.
734 */
735
736 #define ENTRYTYPELEN 14
737 #define PERMS 4
738 #define ACL_ENTRY_SIZE (ENTRYTYPELEN + ID_STR_MAX + PERMS + APPENDED_ID_MAX)
739
740 char *
741 aclent_acltotext(aclent_t *aclp, int aclcnt, int flags)
742 {
743 dynaclstr_t *dstr;
744 char *aclexport = NULL;
745 int i;
746 int error = 0;
747
748 if (aclp == NULL)
749 return (NULL);
750 if ((dstr = malloc(sizeof (dynaclstr_t))) == NULL)
751 return (NULL);
752 dstr->d_bufsize = aclcnt * ACL_ENTRY_SIZE;
753 if ((dstr->d_aclexport = malloc(dstr->d_bufsize)) == NULL) {
754 free(dstr);
755 return (NULL);
756 }
757 *dstr->d_aclexport = '\0';
758 dstr->d_pos = 0;
759
760 for (i = 0; i < aclcnt; i++, aclp++) {
761 if (error = aclent_type_txt(dstr, aclp, flags))
762 break;
763 if (error = aclent_perm_txt(dstr, aclp->a_perm))
764 break;
765
766 if ((flags & ACL_APPEND_ID) && ((aclp->a_type == USER) ||
767 (aclp->a_type == DEF_USER) || (aclp->a_type == GROUP) ||
768 (aclp->a_type == DEF_GROUP))) {
769 char id[ID_STR_MAX], *idstr;
770
771 if (error = str_append(dstr, ":"))
772 break;
773 id[ID_STR_MAX - 1] = '\0'; /* null terminate buffer */
774 idstr = lltostr(aclp->a_id, &id[ID_STR_MAX - 1]);
775 if (error = str_append(dstr, idstr))
776 break;
777 }
778 if (i < aclcnt - 1)
779 if (error = str_append(dstr, ","))
780 break;
781 }
782 if (error) {
783 if (dstr->d_aclexport)
784 free(dstr->d_aclexport);
785 } else {
786 aclexport = dstr->d_aclexport;
787 }
788 free(dstr);
789 return (aclexport);
790 }
791
792 char *
793 acltotext(aclent_t *aclp, int aclcnt)
794 {
795 return (aclent_acltotext(aclp, aclcnt, 0));
796 }
797
798
799 aclent_t *
800 aclfromtext(char *aclstr, int *aclcnt)
801 {
802 acl_t *aclp;
803 aclent_t *aclentp;
804 int error;
805
806 error = acl_fromtext(aclstr, &aclp);
807 if (error)
808 return (NULL);
809
810 aclentp = aclp->acl_aclp;
811 aclp->acl_aclp = NULL;
812 *aclcnt = aclp->acl_cnt;
813
814 acl_free(aclp);
815 return (aclentp);
816 }
817
818
819 /*
820 * Append string onto dynaclstr_t.
821 *
822 * Return 0 on success, 1 for failure.
823 */
824 static int
825 str_append(dynaclstr_t *dstr, char *newstr)
826 {
827 size_t len = strlen(newstr);
828
829 if ((len + dstr->d_pos) >= dstr->d_bufsize) {
830 dstr->d_aclexport = realloc(dstr->d_aclexport,
831 dstr->d_bufsize + len + 1);
832 if (dstr->d_aclexport == NULL)
833 return (1);
834 dstr->d_bufsize += len;
835 }
836 (void) strcat(&dstr->d_aclexport[dstr->d_pos], newstr);
837 dstr->d_pos += len;
838 return (0);
839 }
840
841 static int
842 aclent_perm_txt(dynaclstr_t *dstr, o_mode_t perm)
843 {
844 char buf[4];
845
846 if (perm & S_IROTH)
847 buf[0] = 'r';
848 else
849 buf[0] = '-';
850 if (perm & S_IWOTH)
851 buf[1] = 'w';
852 else
853 buf[1] = '-';
854 if (perm & S_IXOTH)
855 buf[2] = 'x';
856 else
857 buf[2] = '-';
858 buf[3] = '\0';
859 return (str_append(dstr, buf));
860 }
861
862 /*
863 * ace_acltotext() convert each ace formatted acl to look like this:
864 *
865 * entry_type:uid^gid^name:perms[:flags]:<allow|deny>[:id][,]
866 *
867 * The maximum length of entry_type is 5 ("group")
868 *
869 * The max length of a uid^gid^name entry (in theory) is 8,
870 * however id could be a number so we therefore use ID_STR_MAX
871 *
872 * The length of a perms entry is 144 i.e read_data/write_data...
873 * to each acl entry.
874 *
875 * iflags: file_inherit/dir_inherit/inherit_only/no_propagate/successful_access
876 * /failed_access
877 *
878 */
879
880 #define ACE_ENTRYTYPLEN 6
881 #define IFLAGS_STR "file_inherit/dir_inherit/inherit_only/no_propagate/" \
882 "successful_access/failed_access/inherited"
883 #define IFLAGS_SIZE (sizeof (IFLAGS_STR) - 1)
884 #define ACCESS_TYPE_SIZE 7 /* if unknown */
885 #define COLON_CNT 3
886 #define PERMS_LEN 216
887 #define ACE_ENTRY_SIZE (ACE_ENTRYTYPLEN + ID_STR_MAX + PERMS_LEN + \
888 ACCESS_TYPE_SIZE + IFLAGS_SIZE + COLON_CNT + APPENDED_ID_MAX)
889
890 static char *
891 ace_acltotext(acl_t *aceaclp, int flags)
892 {
893 ace_t *aclp = aceaclp->acl_aclp;
894 int aclcnt = aceaclp->acl_cnt;
895 int i;
896 int error = 0;
897 int isdir = (aceaclp->acl_flags & ACL_IS_DIR);
898 dynaclstr_t *dstr;
899 char *aclexport = NULL;
900 char *rawsidp = NULL;
901
902 if (aclp == NULL)
903 return (NULL);
904
905 if ((dstr = malloc(sizeof (dynaclstr_t))) == NULL)
906 return (NULL);
907 dstr->d_bufsize = aclcnt * ACL_ENTRY_SIZE;
908 if ((dstr->d_aclexport = malloc(dstr->d_bufsize)) == NULL) {
909 free(dstr);
910 return (NULL);
911 }
912 *dstr->d_aclexport = '\0';
913 dstr->d_pos = 0;
914
915 for (i = 0; i < aclcnt; i++, aclp++) {
916
917 if (error = ace_type_txt(dstr, aclp, flags))
918 break;
919 if (error = ace_perm_txt(dstr, aclp->a_access_mask,
920 aclp->a_flags, isdir, flags))
921 break;
922 if (error = ace_inherit_txt(dstr, aclp->a_flags, flags))
923 break;
924 if (error = ace_access_txt(dstr, aclp->a_type))
925 break;
926
927 if ((flags & ACL_APPEND_ID) &&
928 (((aclp->a_flags & ACE_TYPE_FLAGS) == 0) ||
929 ((aclp->a_flags & ACE_TYPE_FLAGS) ==
930 ACE_IDENTIFIER_GROUP))) {
931 char id[ID_STR_MAX], *idstr;
932
933 if (error = str_append(dstr, ":"))
934 break;
935
936 rawsidp = NULL;
937 id[ID_STR_MAX -1] = '\0'; /* null terminate */
938 if (aclp->a_who > MAXUID && (flags & ACL_SID_FMT)) {
939
940 error = getsidname(aclp->a_who,
941 ((aclp->a_flags & ACE_TYPE_FLAGS) == 0) ?
942 B_TRUE : B_FALSE, &idstr, 1);
943 rawsidp = idstr;
944 if (error)
945 break;
946 } else if (aclp->a_who > MAXUID &&
947 !(flags & ACL_NORESOLVE)) {
948 idstr = lltostr(UID_NOBODY,
949 &id[ID_STR_MAX - 1]);
950 } else {
951 idstr = lltostr(aclp->a_who,
952 &id[ID_STR_MAX - 1]);
953 }
954 if (error = str_append(dstr, idstr))
955 break;
956 if (rawsidp) {
957 free(rawsidp);
958 rawsidp = NULL;
959 }
960 }
961 if (i < aclcnt - 1) {
962 if (error = str_append(dstr, ","))
963 break;
964 }
965 }
966
967 if (rawsidp)
968 free(rawsidp);
969 if (error) {
970 if (dstr->d_aclexport)
971 free(dstr->d_aclexport);
972 } else {
973 aclexport = dstr->d_aclexport;
974 }
975 free(dstr);
976 return (aclexport);
977 }
978
979 char *
980 acl_totext(acl_t *aclp, int flags)
981 {
982 char *txtp;
983
984 if (aclp == NULL)
985 return (NULL);
986
987 switch (aclp->acl_type) {
988 case ACE_T:
989 txtp = ace_acltotext(aclp, flags);
990 break;
991 case ACLENT_T:
992 txtp = aclent_acltotext(aclp->acl_aclp, aclp->acl_cnt, flags);
993 break;
994 }
995
996 return (txtp);
997 }
998
999 int
1000 acl_fromtext(const char *acltextp, acl_t **ret_aclp)
1001 {
1002 int error;
1003 char *buf;
1004
1005 buf = malloc(strlen(acltextp) + 2);
1006 if (buf == NULL)
1007 return (EACL_MEM_ERROR);
1008 strcpy(buf, acltextp);
1009 strcat(buf, "\n");
1010
1011 (void) mutex_lock(&yymutex);
1012 yybuf = buf;
1013 yyreset();
1014 error = yyparse();
1015 free(buf);
1016
1017 if (yyacl) {
1018 if (error == 0)
1019 *ret_aclp = yyacl;
1020 else {
1021 acl_free(yyacl);
1022 }
1023 yyacl = NULL;
1024 }
1025 (void) mutex_unlock(&yymutex);
1026
1027 return (error);
1028 }
1029
1030 int
1031 acl_parse(const char *acltextp, acl_t **aclp)
1032 {
1033 int error;
1034
1035 yyinteractive = 1;
1036 error = acl_fromtext(acltextp, aclp);
1037 yyinteractive = 0;
1038 return (error);
1039 }
1040
1041 static void
1042 ace_compact_printacl(acl_t *aclp, int flgs)
1043 {
1044 int cnt;
1045 ace_t *acep;
1046 dynaclstr_t *dstr;
1047 int len;
1048
1049 if ((dstr = malloc(sizeof (dynaclstr_t))) == NULL)
1050 return;
1051 dstr->d_bufsize = ACE_ENTRY_SIZE;
1052 if ((dstr->d_aclexport = malloc(dstr->d_bufsize)) == NULL) {
1053 free(dstr);
1054 return;
1055 }
1056 *dstr->d_aclexport = '\0';
1057
1058 dstr->d_pos = 0;
1059 for (cnt = 0, acep = aclp->acl_aclp;
1060 cnt != aclp->acl_cnt; cnt++, acep++) {
1061 dstr->d_aclexport[0] = '\0';
1062 dstr->d_pos = 0;
1063
1064 if (ace_type_txt(dstr, acep, flgs))
1065 break;
1066 len = strlen(&dstr->d_aclexport[0]);
1067 if (ace_perm_txt(dstr, acep->a_access_mask, acep->a_flags,
1068 aclp->acl_flags & ACL_IS_DIR, ACL_COMPACT_FMT))
1069 break;
1070 if (ace_inherit_txt(dstr, acep->a_flags, ACL_COMPACT_FMT))
1071 break;
1072 if (ace_access_txt(dstr, acep->a_type) == -1)
1073 break;
1074 (void) printf(" %20.*s%s\n", len, dstr->d_aclexport,
1075 &dstr->d_aclexport[len]);
1076 }
1077
1078 if (dstr->d_aclexport)
1079 free(dstr->d_aclexport);
1080 free(dstr);
1081 }
1082
1083 static void
1084 ace_printacl(acl_t *aclp, int cols, int flgs)
1085 {
1086 int slot = 0;
1087 char *token;
1088 char *acltext;
1089
1090 if (flgs & ACL_COMPACT_FMT) {
1091 ace_compact_printacl(aclp, flgs);
1092 return;
1093 }
1094
1095 acltext = acl_totext(aclp, flgs);
1096
1097 if (acltext == NULL)
1098 return;
1099
1100 token = strtok(acltext, ",");
1101 if (token == NULL) {
1102 free(acltext);
1103 return;
1104 }
1105
1106 do {
1107 (void) printf(" %d:", slot++);
1108 split_line(token, cols - 5);
1109 } while (token = strtok(NULL, ","));
1110 free(acltext);
1111 }
1112
1113 /*
1114 * pretty print an ACL.
1115 * For aclent_t ACL's the format is
1116 * similar to the old format used by getfacl,
1117 * with the addition of adding a "slot" number
1118 * before each entry.
1119 *
1120 * for ace_t ACL's the cols variable will break up
1121 * the long lines into multiple lines and will also
1122 * print a "slot" number.
1123 */
1124 void
1125 acl_printacl(acl_t *aclp, int cols, int flgs)
1126 {
1127
1128 switch (aclp->acl_type) {
1129 case ACLENT_T:
1130 aclent_printacl(aclp);
1131 break;
1132 case ACE_T:
1133 ace_printacl(aclp, cols, flgs);
1134 break;
1135 }
1136 }
1137
1138 typedef struct value_table {
1139 char p_letter; /* perm letter such as 'r' */
1140 uint32_t p_value; /* value for perm when pletter found */
1141 } value_table_t;
1142
1143 /*
1144 * The permission tables are laid out in positional order
1145 * a '-' character will indicate a permission at a given
1146 * position is not specified. The '-' is not part of the
1147 * table, but will be checked for in the permission computation
1148 * routine.
1149 */
1150 value_table_t ace_perm_table[] = {
1151 { 'r', ACE_READ_DATA},
1152 { 'w', ACE_WRITE_DATA},
1153 { 'x', ACE_EXECUTE},
1154 { 'p', ACE_APPEND_DATA},
1155 { 'd', ACE_DELETE},
1156 { 'D', ACE_DELETE_CHILD},
1157 { 'a', ACE_READ_ATTRIBUTES},
1158 { 'A', ACE_WRITE_ATTRIBUTES},
1159 { 'R', ACE_READ_NAMED_ATTRS},
1160 { 'W', ACE_WRITE_NAMED_ATTRS},
1161 { 'c', ACE_READ_ACL},
1162 { 'C', ACE_WRITE_ACL},
1163 { 'o', ACE_WRITE_OWNER},
1164 { 's', ACE_SYNCHRONIZE}
1165 };
1166
1167 #define ACE_PERM_COUNT (sizeof (ace_perm_table) / sizeof (value_table_t))
1168
1169 value_table_t aclent_perm_table[] = {
1170 { 'r', S_IROTH},
1171 { 'w', S_IWOTH},
1172 { 'x', S_IXOTH}
1173 };
1174
1175 #define ACLENT_PERM_COUNT (sizeof (aclent_perm_table) / sizeof (value_table_t))
1176
1177 value_table_t inherit_table[] = {
1178 {'f', ACE_FILE_INHERIT_ACE},
1179 {'d', ACE_DIRECTORY_INHERIT_ACE},
1180 {'i', ACE_INHERIT_ONLY_ACE},
1181 {'n', ACE_NO_PROPAGATE_INHERIT_ACE},
1182 {'S', ACE_SUCCESSFUL_ACCESS_ACE_FLAG},
1183 {'F', ACE_FAILED_ACCESS_ACE_FLAG},
1184 {'I', ACE_INHERITED_ACE}
1185 };
1186
1187 #define IFLAG_COUNT (sizeof (inherit_table) / sizeof (value_table_t))
1188 #define IFLAG_COUNT_V1 6 /* Older version compatibility */
1189
1190 /*
1191 * compute value from a permission table or inheritance table
1192 * based on string passed in. If positional is set then
1193 * string must match order in permtab, otherwise any order
1194 * is allowed.
1195 */
1196 int
1197 compute_values(value_table_t *permtab, int count,
1198 char *permstr, int positional, uint32_t *mask)
1199 {
1200 uint32_t perm_val = 0;
1201 char *pstr;
1202 int i, found;
1203
1204 if (count < 0)
1205 return (1);
1206
1207 if (positional) {
1208 for (i = 0, pstr = permstr; i != count && pstr &&
1209 *pstr; i++, pstr++) {
1210 if (*pstr == permtab[i].p_letter) {
1211 perm_val |= permtab[i].p_value;
1212 } else if (*pstr != '-') {
1213 return (1);
1214 }
1215 }
1216 } else { /* random order single letters with no '-' */
1217 for (pstr = permstr; pstr && *pstr; pstr++) {
1218 for (found = 0, i = 0; i != count; i++) {
1219 if (*pstr == permtab[i].p_letter) {
1220 perm_val |= permtab[i].p_value;
1221 found = 1;
1222 break;
1223 }
1224 }
1225 if (found == 0)
1226 return (1);
1227 }
1228 }
1229
1230 *mask = perm_val;
1231 return (0);
1232 }
1233
1234
1235 int
1236 ace_inherit_helper(char *str, uint32_t *imask, int table_length)
1237 {
1238 int rc = 0;
1239
1240 if (strlen(str) == table_length) {
1241 /*
1242 * If the string == table_length then first check to see it's
1243 * in positional format. If that fails then see if it's in
1244 * non-positional format.
1245 */
1246 if (compute_values(inherit_table, table_length, str,
1247 1, imask) && compute_values(inherit_table,
1248 table_length, str, 0, imask)) {
1249 rc = 1;
1250 }
1251 } else {
1252 rc = compute_values(inherit_table, table_length, str, 0, imask);
1253 }
1254
1255 return (rc ? EACL_INHERIT_ERROR : 0);
1256 }
1257
1258 /*
1259 * compute value for inheritance flags.
1260 */
1261 int
1262 compute_ace_inherit(char *str, uint32_t *imask)
1263 {
1264 int rc = 0;
1265
1266 rc = ace_inherit_helper(str, imask, IFLAG_COUNT);
1267
1268 if (rc && strlen(str) != IFLAG_COUNT) {
1269
1270 /* is it an old formatted inherit string? */
1271 rc = ace_inherit_helper(str, imask, IFLAG_COUNT_V1);
1272 }
1273
1274 return (rc);
1275 }
1276
1277
1278 /*
1279 * compute value for ACE permissions.
1280 */
1281 int
1282 compute_ace_perms(char *str, uint32_t *mask)
1283 {
1284 int positional = 0;
1285 int error;
1286
1287 if (strlen(str) == ACE_PERM_COUNT)
1288 positional = 1;
1289
1290 error = compute_values(ace_perm_table, ACE_PERM_COUNT,
1291 str, positional, mask);
1292
1293 if (error && positional) {
1294 /*
1295 * If positional was set, then make sure permissions
1296 * aren't actually valid in non positional case where
1297 * all permissions are specified, just in random order.
1298 */
1299 error = compute_values(ace_perm_table,
1300 ACE_PERM_COUNT, str, 0, mask);
1301 }
1302 if (error)
1303 error = EACL_PERM_MASK_ERROR;
1304
1305 return (error);
1306 }
1307
1308
1309
1310 /*
1311 * compute values for aclent permissions.
1312 */
1313 int
1314 compute_aclent_perms(char *str, o_mode_t *mask)
1315 {
1316 int error;
1317 uint32_t pmask;
1318
1319 if (strlen(str) != ACLENT_PERM_COUNT)
1320 return (EACL_PERM_MASK_ERROR);
1321
1322 *mask = 0;
1323 error = compute_values(aclent_perm_table, ACLENT_PERM_COUNT,
1324 str, 1, &pmask);
1325 if (error == 0) {
1326 *mask = (o_mode_t)pmask;
1327 } else
1328 error = EACL_PERM_MASK_ERROR;
1329 return (error);
1330 }
1331
1332 /*
1333 * determine ACE permissions.
1334 */
1335 int
1336 ace_perm_mask(struct acl_perm_type *aclperm, uint32_t *mask)
1337 {
1338 int error;
1339
1340 if (aclperm->perm_style == PERM_TYPE_EMPTY) {
1341 *mask = 0;
1342 return (0);
1343 }
1344
1345 if (aclperm->perm_style == PERM_TYPE_ACE) {
1346 *mask = aclperm->perm_val;
1347 return (0);
1348 }
1349
1350 error = compute_ace_perms(aclperm->perm_str, mask);
1351 if (error) {
1352 acl_error(dgettext(TEXT_DOMAIN,
1353 "Invalid permission(s) '%s' specified\n"),
1354 aclperm->perm_str);
1355 return (EACL_PERM_MASK_ERROR);
1356 }
1357
1358 return (0);
1359 }