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 #include "popt_common.h"
28 #include "../libcli/security/security.h"
29 #include "passdb/machine_sid.h"
32 static TALLOC_CTX
*ctx
;
34 enum acl_mode
{ SMB_ACL_DELETE
,
44 /********************************************************************
45 ********************************************************************/
47 static struct security_descriptor
* parse_acl_string(TALLOC_CTX
*mem_ctx
, const char *szACL
, size_t *sd_size
)
49 struct security_descriptor
*sd
= NULL
;
50 struct security_ace
*ace
;
51 struct security_acl
*theacl
;
60 num_ace
= count_chars( pacl
, ',' ) + 1;
62 if ( !(ace
= talloc_zero_array( mem_ctx
, struct security_ace
, num_ace
)) )
65 for ( i
=0; i
<num_ace
; i
++ ) {
66 char *end_acl
= strchr_m( pacl
, ',' );
69 strncpy( acl_string
, pacl
, MIN( PTR_DIFF( end_acl
, pacl
), sizeof(fstring
)-1) );
70 acl_string
[MIN( PTR_DIFF( end_acl
, pacl
), sizeof(fstring
)-1)] = '\0';
72 if ( !parse_ace(NULL
, &ace
[i
], acl_string
) )
79 if ( !(theacl
= make_sec_acl( mem_ctx
, NT4_ACL_REVISION
, num_ace
, ace
)) )
82 sd
= make_sec_desc( mem_ctx
, SD_REVISION
, SEC_DESC_SELF_RELATIVE
,
83 NULL
, NULL
, NULL
, theacl
, sd_size
);
88 /* add an ACE to a list of ACEs in a struct security_acl */
89 static bool add_ace(TALLOC_CTX
*mem_ctx
, struct security_acl
**the_acl
, struct security_ace
*ace
)
91 struct security_acl
*new_ace
;
92 struct security_ace
*aces
;
94 return (((*the_acl
) = make_sec_acl(mem_ctx
, 3, 1, ace
)) != NULL
);
97 if (!(aces
= SMB_CALLOC_ARRAY(struct security_ace
, 1+(*the_acl
)->num_aces
))) {
100 memcpy(aces
, (*the_acl
)->aces
, (*the_acl
)->num_aces
* sizeof(struct
102 memcpy(aces
+(*the_acl
)->num_aces
, ace
, sizeof(struct security_ace
));
103 new_ace
= make_sec_acl(mem_ctx
,(*the_acl
)->revision
,1+(*the_acl
)->num_aces
, aces
);
105 (*the_acl
) = new_ace
;
109 /* The MSDN is contradictory over the ordering of ACE entries in an ACL.
110 However NT4 gives a "The information may have been modified by a
111 computer running Windows NT 5.0" if denied ACEs do not appear before
114 static int ace_compare(struct security_ace
*ace1
, struct security_ace
*ace2
)
116 if (security_ace_equal(ace1
, ace2
))
119 if (ace1
->type
!= ace2
->type
)
120 return ace2
->type
- ace1
->type
;
122 if (dom_sid_compare(&ace1
->trustee
, &ace2
->trustee
))
123 return dom_sid_compare(&ace1
->trustee
, &ace2
->trustee
);
125 if (ace1
->flags
!= ace2
->flags
)
126 return ace1
->flags
- ace2
->flags
;
128 if (ace1
->access_mask
!= ace2
->access_mask
)
129 return ace1
->access_mask
- ace2
->access_mask
;
131 if (ace1
->size
!= ace2
->size
)
132 return ace1
->size
- ace2
->size
;
134 return memcmp(ace1
, ace2
, sizeof(struct security_ace
));
137 static void sort_acl(struct security_acl
*the_acl
)
140 if (!the_acl
) return;
142 TYPESAFE_QSORT(the_acl
->aces
, the_acl
->num_aces
, ace_compare
);
144 for (i
=1;i
<the_acl
->num_aces
;) {
145 if (security_ace_equal(&the_acl
->aces
[i
-1],
146 &the_acl
->aces
[i
])) {
148 for (j
=i
; j
<the_acl
->num_aces
-1; j
++) {
149 the_acl
->aces
[j
] = the_acl
->aces
[j
+1];
159 static int change_share_sec(TALLOC_CTX
*mem_ctx
, const char *sharename
, char *the_acl
, enum acl_mode mode
)
161 struct security_descriptor
*sd
= NULL
;
162 struct security_descriptor
*old
= NULL
;
166 if (mode
!= SMB_ACL_SET
&& mode
!= SMB_SD_DELETE
) {
167 if (!(old
= get_share_security( mem_ctx
, sharename
, &sd_size
)) ) {
168 fprintf(stderr
, "Unable to retrieve permissions for share "
169 "[%s]\n", sharename
);
174 if ( (mode
!= SMB_ACL_VIEW
&& mode
!= SMB_SD_DELETE
) &&
175 !(sd
= parse_acl_string(mem_ctx
, the_acl
, &sd_size
)) ) {
176 fprintf( stderr
, "Failed to parse acl\n");
181 case SMB_ACL_VIEW_ALL
:
182 /* should not happen */
185 sec_desc_print(NULL
, stdout
, old
, false);
188 for (i
=0;sd
->dacl
&& i
<sd
->dacl
->num_aces
;i
++) {
191 for (j
=0;old
->dacl
&& j
<old
->dacl
->num_aces
;j
++) {
192 if (security_ace_equal(&sd
->dacl
->aces
[i
],
193 &old
->dacl
->aces
[j
])) {
195 for (k
=j
; k
<old
->dacl
->num_aces
-1;k
++) {
196 old
->dacl
->aces
[k
] = old
->dacl
->aces
[k
+1];
198 old
->dacl
->num_aces
--;
205 printf("ACL for ACE:");
206 print_ace(NULL
, stdout
, &sd
->dacl
->aces
[i
], false);
207 printf(" not found\n");
212 for (i
=0;sd
->dacl
&& i
<sd
->dacl
->num_aces
;i
++) {
215 for (j
=0;old
->dacl
&& j
<old
->dacl
->num_aces
;j
++) {
216 if (dom_sid_equal(&sd
->dacl
->aces
[i
].trustee
,
217 &old
->dacl
->aces
[j
].trustee
)) {
218 old
->dacl
->aces
[j
] = sd
->dacl
->aces
[i
];
224 printf("ACL for SID %s not found\n",
225 sid_string_tos(&sd
->dacl
->aces
[i
].trustee
));
230 old
->owner_sid
= sd
->owner_sid
;
234 old
->group_sid
= sd
->group_sid
;
238 for (i
=0;sd
->dacl
&& i
<sd
->dacl
->num_aces
;i
++) {
239 add_ace(mem_ctx
, &old
->dacl
, &sd
->dacl
->aces
[i
]);
246 if (!delete_share_security(sharename
)) {
247 fprintf( stderr
, "Failed to delete security descriptor for "
248 "share [%s]\n", sharename
);
253 fprintf(stderr
, "invalid command\n");
257 /* Denied ACE entries must come before allowed ones */
260 if ( !set_share_security( sharename
, old
) ) {
261 fprintf( stderr
, "Failed to store acl for share [%s]\n", sharename
);
267 static int set_sharesec_sddl(const char *sharename
, const char *sddl
)
269 struct security_descriptor
*sd
;
272 sd
= sddl_decode(talloc_tos(), sddl
, get_global_sam_sid());
274 fprintf(stderr
, "Failed to parse acl\n");
278 ret
= set_share_security(sharename
, sd
);
281 fprintf(stderr
, "Failed to store acl for share [%s]\n",
289 static int view_sharesec_sddl(const char *sharename
)
291 struct security_descriptor
*sd
;
295 sd
= get_share_security(talloc_tos(), sharename
, &sd_size
);
297 fprintf(stderr
, "Unable to retrieve permissions for share "
298 "[%s]\n", sharename
);
302 acl
= sddl_encode(talloc_tos(), sd
, get_global_sam_sid());
305 fprintf(stderr
, "Unable to sddl-encode permissions for share "
306 "[%s]\n", sharename
);
314 /********************************************************************
316 ********************************************************************/
322 int main(int argc
, const char *argv
[])
326 enum acl_mode mode
= SMB_ACL_SET
;
327 static char *the_acl
= NULL
;
329 bool force_acl
= False
;
332 bool initialize_sid
= False
;
333 struct poptOption long_options
[] = {
335 { "remove", 'r', POPT_ARG_STRING
, &the_acl
, 'r', "Remove ACEs", "ACL" },
336 { "modify", 'm', POPT_ARG_STRING
, &the_acl
, 'm', "Modify existing ACEs", "ACL" },
337 { "add", 'a', POPT_ARG_STRING
, &the_acl
, 'a', "Add ACEs", "ACL" },
338 { "replace", 'R', POPT_ARG_STRING
, &the_acl
, 'R', "Overwrite share permission ACL", "ACLS" },
339 { "delete", 'D', POPT_ARG_NONE
, NULL
, 'D', "Delete the entire security descriptor" },
340 { "setsddl", 'S', POPT_ARG_STRING
, the_acl
, 'S',
341 "Set the SD in sddl format" },
342 { "viewsddl", 'V', POPT_ARG_NONE
, the_acl
, 'V',
343 "View the SD in sddl format" },
344 { "view", 'v', POPT_ARG_NONE
, NULL
, 'v', "View current share permissions" },
345 { "view-all", 0, POPT_ARG_NONE
, NULL
, OPT_VIEW_ALL
,
346 "View all current share permissions" },
347 { "machine-sid", 'M', POPT_ARG_NONE
, NULL
, 'M', "Initialize the machine SID" },
348 { "force", 'F', POPT_ARG_NONE
, NULL
, 'F', "Force storing the ACL", "ACLS" },
353 if ( !(ctx
= talloc_stackframe()) ) {
354 fprintf( stderr
, "Failed to initialize talloc context!\n");
358 /* set default debug level to 1 regardless of what smb.conf sets */
359 setup_logging( "sharesec", DEBUG_STDERR
);
363 lp_set_cmdline("log level", "1");
365 pc
= poptGetContext("sharesec", argc
, argv
, long_options
, 0);
367 poptSetOtherOptionHelp(pc
, "sharename\n");
369 while ((opt
= poptGetNextOpt(pc
)) != -1) {
372 the_acl
= smb_xstrdup(poptGetOptArg(pc
));
373 mode
= SMB_ACL_DELETE
;
377 the_acl
= smb_xstrdup(poptGetOptArg(pc
));
378 mode
= SMB_ACL_MODIFY
;
382 the_acl
= smb_xstrdup(poptGetOptArg(pc
));
387 the_acl
= smb_xstrdup(poptGetOptArg(pc
));
392 mode
= SMB_SD_DELETE
;
396 mode
= SMB_SD_SETSDDL
;
397 the_acl
= smb_xstrdup(poptGetOptArg(pc
));
401 mode
= SMB_SD_VIEWSDDL
;
413 initialize_sid
= True
;
416 mode
= SMB_ACL_VIEW_ALL
;
423 lp_load_with_registry_shares(get_dyn_CONFIGFILE());
425 /* check for initializing secrets.tdb first */
427 if ( initialize_sid
) {
428 struct dom_sid
*sid
= get_global_sam_sid();
431 fprintf( stderr
, "Failed to retrieve Machine SID!\n");
435 printf ("%s\n", sid_string_tos( sid
) );
439 if ( mode
== SMB_ACL_VIEW
&& force_acl
) {
440 fprintf( stderr
, "Invalid combination of -F and -v\n");
444 if (mode
== SMB_ACL_VIEW_ALL
) {
447 for (i
=0; i
<lp_numservices(); i
++) {
448 TALLOC_CTX
*frame
= talloc_stackframe();
449 const char *service
= lp_servicename(frame
, i
);
451 if (service
== NULL
) {
455 printf("[%s]\n", service
);
456 change_share_sec(frame
, service
, NULL
, SMB_ACL_VIEW
);
463 /* get the sharename */
465 if(!poptPeekArg(pc
)) {
466 poptPrintUsage(pc
, stderr
, 0);
470 fstrcpy(sharename
, poptGetArg(pc
));
472 snum
= lp_servicenumber( sharename
);
474 if ( snum
== -1 && !force_acl
) {
475 fprintf( stderr
, "Invalid sharename: %s\n", sharename
);
481 retval
= set_sharesec_sddl(sharename
, the_acl
);
483 case SMB_SD_VIEWSDDL
:
484 retval
= view_sharesec_sddl(sharename
);
487 retval
= change_share_sec(ctx
, sharename
, the_acl
, mode
);