2 * Unix SMB/Netbios implementation.
3 * Utility for managing share permissions
5 * Copyright (C) Tim Potter 2000
6 * Copyright (C) Jeremy Allison 2000
7 * Copyright (C) Jelmer Vernooij 2003
8 * Copyright (C) Gerald (Jerry) Carter 2005.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
27 static TALLOC_CTX *ctx;
29 enum acl_mode {SMB_ACL_DELETE, SMB_ACL_MODIFY, SMB_ACL_ADD, SMB_ACL_SET, SMB_ACL_VIEW };
36 /* These values discovered by inspection */
38 static const struct perm_value special_values[] = {
39 { "R", SEC_RIGHTS_FILE_READ },
40 { "W", SEC_RIGHTS_FILE_WRITE },
41 { "X", SEC_RIGHTS_FILE_EXECUTE },
42 { "D", SEC_STD_DELETE },
43 { "P", SEC_STD_WRITE_DAC },
44 { "O", SEC_STD_WRITE_OWNER },
48 #define SEC_RIGHTS_DIR_CHANGE ( SEC_RIGHTS_DIR_READ|SEC_STD_DELETE|SEC_RIGHTS_DIR_WRITE|SEC_DIR_TRAVERSE )
50 static const struct perm_value standard_values[] = {
51 { "READ", SEC_RIGHTS_DIR_READ|SEC_DIR_TRAVERSE },
52 { "CHANGE", SEC_RIGHTS_DIR_CHANGE },
53 { "FULL", SEC_RIGHTS_DIR_ALL },
57 /********************************************************************
58 print an ACE on a FILE
59 ********************************************************************/
61 static void print_ace(FILE *f, SEC_ACE *ace)
63 const struct perm_value *v;
67 fprintf(f, "%s:", sid_string_static(&ace->trustee));
71 if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED) {
72 fprintf(f, "ALLOWED");
73 } else if (ace->type == SEC_ACE_TYPE_ACCESS_DENIED) {
76 fprintf(f, "%d", ace->type);
79 /* Not sure what flags can be set in a file ACL */
81 fprintf(f, "/%d/", ace->flags);
83 /* Standard permissions */
85 for (v = standard_values; v->perm; v++) {
86 if (ace->access_mask == v->mask) {
87 fprintf(f, "%s", v->perm);
92 /* Special permissions. Print out a hex value if we have
93 leftover bits in the mask. */
95 got_mask = ace->access_mask;
98 for (v = special_values; v->perm; v++) {
99 if ((ace->access_mask & v->mask) == v->mask) {
101 fprintf(f, "%s", v->perm);
103 got_mask &= ~v->mask;
109 fprintf(f, "0x%08x", ace->access_mask);
117 /********************************************************************
118 print a ascii version of a security descriptor on a FILE handle
119 ********************************************************************/
121 static void sec_desc_print(FILE *f, SEC_DESC *sd)
125 fprintf(f, "REVISION:%d\n", sd->revision);
127 /* Print owner and group sid */
129 fprintf(f, "OWNER:%s\n", sid_string_static(sd->owner_sid));
131 fprintf(f, "GROUP:%s\n", sid_string_static(sd->group_sid));
134 for (i = 0; sd->dacl && i < sd->dacl->num_aces; i++) {
135 SEC_ACE *ace = &sd->dacl->aces[i];
143 /********************************************************************
144 parse an ACE in the same format as print_ace()
145 ********************************************************************/
147 static bool parse_ace(SEC_ACE *ace, const char *orig_str)
152 unsigned int atype = 0;
153 unsigned int aflags = 0;
154 unsigned int amask = 0;
157 const struct perm_value *v;
158 char *str = SMB_STRDUP(orig_str);
165 p = strchr_m(str,':');
167 printf("ACE '%s': missing ':'.\n", orig_str);
173 /* Try to parse numeric form */
175 if (sscanf(p, "%i/%i/%i", &atype, &aflags, &amask) == 3 &&
176 string_to_sid(&sid, str)) {
180 /* Try to parse text form */
182 if (!string_to_sid(&sid, str)) {
183 printf("ACE '%s': failed to convert '%s' to SID\n",
190 if (!next_token(&cp, tok, "/", sizeof(fstring))) {
191 printf("ACE '%s': failed to find '/' character.\n",
197 if (strncmp(tok, "ALLOWED", strlen("ALLOWED")) == 0) {
198 atype = SEC_ACE_TYPE_ACCESS_ALLOWED;
199 } else if (strncmp(tok, "DENIED", strlen("DENIED")) == 0) {
200 atype = SEC_ACE_TYPE_ACCESS_DENIED;
202 printf("ACE '%s': missing 'ALLOWED' or 'DENIED' entry at '%s'\n",
208 /* Only numeric form accepted for flags at present */
209 /* no flags on share permissions */
211 if (!(next_token(&cp, tok, "/", sizeof(fstring)) &&
212 sscanf(tok, "%i", &aflags) && aflags == 0)) {
213 printf("ACE '%s': bad integer flags entry at '%s'\n",
219 if (!next_token(&cp, tok, "/", sizeof(fstring))) {
220 printf("ACE '%s': missing / at '%s'\n",
226 if (strncmp(tok, "0x", 2) == 0) {
227 if (sscanf(tok, "%i", &amask) != 1) {
228 printf("ACE '%s': bad hex number at '%s'\n",
236 for (v = standard_values; v->perm; v++) {
237 if (strcmp(tok, v->perm) == 0) {
248 for (v = special_values; v->perm; v++) {
249 if (v->perm[0] == *p) {
256 printf("ACE '%s': bad permission value at '%s'\n",
271 init_sec_ace(ace, &sid, atype, mask, aflags);
277 /********************************************************************
278 ********************************************************************/
280 static SEC_DESC* parse_acl_string(TALLOC_CTX *mem_ctx, const char *szACL, size_t *sd_size )
293 num_ace = count_chars( pacl, ',' ) + 1;
295 if ( !(ace = TALLOC_ZERO_ARRAY( mem_ctx, SEC_ACE, num_ace )) )
298 for ( i=0; i<num_ace; i++ ) {
299 char *end_acl = strchr_m( pacl, ',' );
302 strncpy( acl_string, pacl, MIN( PTR_DIFF( end_acl, pacl ), sizeof(fstring)-1) );
303 acl_string[MIN( PTR_DIFF( end_acl, pacl ), sizeof(fstring)-1)] = '\0';
305 if ( !parse_ace( &ace[i], acl_string ) )
312 if ( !(acl = make_sec_acl( mem_ctx, NT4_ACL_REVISION, num_ace, ace )) )
315 sd = make_sec_desc( mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
316 NULL, NULL, NULL, acl, sd_size);
321 /* add an ACE to a list of ACEs in a SEC_ACL */
322 static bool add_ace(TALLOC_CTX *mem_ctx, SEC_ACL **the_acl, SEC_ACE *ace)
327 return (((*the_acl) = make_sec_acl(mem_ctx, 3, 1, ace)) != NULL);
330 if (!(aces = SMB_CALLOC_ARRAY(SEC_ACE, 1+(*the_acl)->num_aces))) {
333 memcpy(aces, (*the_acl)->aces, (*the_acl)->num_aces * sizeof(SEC_ACE));
334 memcpy(aces+(*the_acl)->num_aces, ace, sizeof(SEC_ACE));
335 new_ace = make_sec_acl(mem_ctx,(*the_acl)->revision,1+(*the_acl)->num_aces, aces);
337 (*the_acl) = new_ace;
341 /* The MSDN is contradictory over the ordering of ACE entries in an ACL.
342 However NT4 gives a "The information may have been modified by a
343 computer running Windows NT 5.0" if denied ACEs do not appear before
346 static int ace_compare(SEC_ACE *ace1, SEC_ACE *ace2)
348 if (sec_ace_equal(ace1, ace2))
351 if (ace1->type != ace2->type)
352 return ace2->type - ace1->type;
354 if (sid_compare(&ace1->trustee, &ace2->trustee))
355 return sid_compare(&ace1->trustee, &ace2->trustee);
357 if (ace1->flags != ace2->flags)
358 return ace1->flags - ace2->flags;
360 if (ace1->access_mask != ace2->access_mask)
361 return ace1->access_mask - ace2->access_mask;
363 if (ace1->size != ace2->size)
364 return ace1->size - ace2->size;
366 return memcmp(ace1, ace2, sizeof(SEC_ACE));
369 static void sort_acl(SEC_ACL *the_acl)
372 if (!the_acl) return;
374 qsort(the_acl->aces, the_acl->num_aces, sizeof(the_acl->aces[0]), QSORT_CAST ace_compare);
376 for (i=1;i<the_acl->num_aces;) {
377 if (sec_ace_equal(&the_acl->aces[i-1], &the_acl->aces[i])) {
379 for (j=i; j<the_acl->num_aces-1; j++) {
380 the_acl->aces[j] = the_acl->aces[j+1];
390 static int change_share_sec(TALLOC_CTX *mem_ctx, const char *sharename, char *the_acl, enum acl_mode mode)
393 SEC_DESC *old = NULL;
397 if (mode != SMB_ACL_SET) {
398 if (!(old = get_share_security( mem_ctx, sharename, &sd_size )) ) {
399 fprintf(stderr, "Unable to retrieve permissions for share [%s]\n", sharename);
404 if ( (mode != SMB_ACL_VIEW) && !(sd = parse_acl_string(mem_ctx, the_acl, &sd_size )) ) {
405 fprintf( stderr, "Failed to parse acl\n");
411 sec_desc_print( stdout, old);
414 for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
417 for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
418 if (sec_ace_equal(&sd->dacl->aces[i], &old->dacl->aces[j])) {
420 for (k=j; k<old->dacl->num_aces-1;k++) {
421 old->dacl->aces[k] = old->dacl->aces[k+1];
423 old->dacl->num_aces--;
430 printf("ACL for ACE:");
431 print_ace(stdout, &sd->dacl->aces[i]);
432 printf(" not found\n");
438 for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
441 for (j=0;old->dacl && j<old->dacl->num_aces;j++) {
442 if (sid_equal(&sd->dacl->aces[i].trustee,
443 &old->dacl->aces[j].trustee)) {
444 old->dacl->aces[j] = sd->dacl->aces[i];
450 printf("ACL for SID %s not found\n", sid_string_static(&sd->dacl->aces[i].trustee));
455 old->owner_sid = sd->owner_sid;
459 old->group_sid = sd->group_sid;
463 for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) {
464 add_ace(mem_ctx, &old->dacl, &sd->dacl->aces[i]);
472 /* Denied ACE entries must come before allowed ones */
475 if ( !set_share_security( sharename, old ) ) {
476 fprintf( stderr, "Failed to store acl for share [%s]\n", sharename );
482 /********************************************************************
484 ********************************************************************/
486 int main(int argc, const char *argv[])
490 enum acl_mode mode = SMB_ACL_SET;
491 static char *the_acl = NULL;
493 bool force_acl = False;
496 bool initialize_sid = False;
497 struct poptOption long_options[] = {
499 { "remove", 'r', POPT_ARG_STRING, &the_acl, 'r', "Delete an ACE", "ACL" },
500 { "modify", 'm', POPT_ARG_STRING, &the_acl, 'm', "Modify an acl", "ACL" },
501 { "add", 'a', POPT_ARG_STRING, &the_acl, 'a', "Add an ACE", "ACL" },
502 { "replace", 'R', POPT_ARG_STRING, &the_acl, 'R', "Set share mission ACL", "ACLS" },
503 { "view", 'v', POPT_ARG_NONE, NULL, 'v', "View current share permissions" },
504 { "machine-sid", 'M', POPT_ARG_NONE, NULL, 'M', "Initialize the machine SID" },
505 { "force", 'F', POPT_ARG_NONE, NULL, 'F', "Force storing the ACL", "ACLS" },
510 if ( !(ctx = talloc_stackframe()) ) {
511 fprintf( stderr, "Failed to initialize talloc context!\n");
515 /* set default debug level to 1 regardless of what smb.conf sets */
516 setup_logging( "sharesec", True );
517 DEBUGLEVEL_CLASS[DBGC_ALL] = 1;
519 x_setbuf( x_stderr, NULL );
521 pc = poptGetContext("sharesec", argc, argv, long_options, 0);
523 poptSetOtherOptionHelp(pc, "sharename\n");
525 while ((opt = poptGetNextOpt(pc)) != -1) {
528 the_acl = smb_xstrdup(poptGetOptArg(pc));
529 mode = SMB_ACL_DELETE;
533 the_acl = smb_xstrdup(poptGetOptArg(pc));
534 mode = SMB_ACL_MODIFY;
538 the_acl = smb_xstrdup(poptGetOptArg(pc));
542 the_acl = smb_xstrdup(poptGetOptArg(pc));
555 initialize_sid = True;
564 lp_load( dyn_CONFIGFILE, False, False, False, True );
566 /* check for initializing secrets.tdb first */
568 if ( initialize_sid ) {
569 DOM_SID *sid = get_global_sam_sid();
572 fprintf( stderr, "Failed to retrieve Machine SID!\n");
576 printf ("%s\n", sid_string_static( sid ) );
580 if ( mode == SMB_ACL_VIEW && force_acl ) {
581 fprintf( stderr, "Invalid combination of -F and -v\n");
585 /* get the sharename */
587 if(!poptPeekArg(pc)) {
588 poptPrintUsage(pc, stderr, 0);
592 fstrcpy(sharename, poptGetArg(pc));
594 snum = lp_servicenumber( sharename );
596 if ( snum == -1 && !force_acl ) {
597 fprintf( stderr, "Invalid sharename: %s\n", sharename);
601 retval = change_share_sec(ctx, sharename, the_acl, mode);