2 Unix SMB/CIFS implementation.
4 security descriptor description language functions
6 Copyright (C) Andrew Tridgell 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "system/iconv.h"
32 map a series of letter codes into a uint32_t
34 static BOOL sddl_map_flags(const struct flag_map *map, const char *str,
35 uint32_t *flags, size_t *len)
37 const char *str0 = str;
40 while (str[0] && isupper(str[0])) {
42 for (i=0;map[i].name;i++) {
43 size_t l = strlen(map[i].name);
44 if (strncmp(map[i].name, str, l) == 0) {
45 *flags |= map[i].flag;
51 if (map[i].name == NULL) {
52 DEBUG(1, ("Unknown flag - %s in %s\n", str, str0));
60 a mapping between the 2 letter SID codes and sid strings
67 { "AO", SID_BUILTIN_ACCOUNT_OPERATORS },
68 { "BA", SID_BUILTIN_ADMINISTRATORS },
69 { "RU", SID_BUILTIN_PREW2K },
70 { "PO", SID_BUILTIN_PRINT_OPERATORS },
71 { "RS", SID_BUILTIN_RAS_SERVERS },
73 { "AU", SID_NT_AUTHENTICATED_USERS },
74 { "SY", SID_NT_SYSTEM },
75 { "PS", SID_NT_SELF },
77 { "ED", SID_NT_ENTERPRISE_DCS },
79 { "CO", SID_CREATOR_OWNER },
80 { "CG", SID_CREATOR_GROUP },
82 { "DA", NULL, DOMAIN_RID_ADMINS },
83 { "EA", NULL, DOMAIN_RID_ENTERPRISE_ADMINS },
84 { "DD", NULL, DOMAIN_RID_DCS },
85 { "DU", NULL, DOMAIN_RID_USERS },
86 { "CA", NULL, DOMAIN_RID_CERT_ADMINS },
91 It can either be a special 2 letter code, or in S-* format
93 static struct dom_sid *sddl_decode_sid(TALLOC_CTX *mem_ctx, const char **sddlp,
94 const struct dom_sid *domain_sid)
96 const char *sddl = (*sddlp);
99 /* see if its in the numeric format */
100 if (strncmp(sddl, "S-", 2) == 0) {
101 size_t len = strspn(sddl+2, "-0123456789");
103 return dom_sid_parse_talloc(mem_ctx, sddl);
106 /* now check for one of the special codes */
107 for (i=0;i<ARRAY_SIZE(sid_codes);i++) {
108 if (strncmp(sid_codes[i].code, sddl, 2) == 0) break;
110 if (i == ARRAY_SIZE(sid_codes)) {
111 DEBUG(1,("Unknown sddl sid code '%2.2s'\n", sddl));
117 if (sid_codes[i].sid == NULL) {
118 return dom_sid_add_rid(mem_ctx, domain_sid, sid_codes[i].rid);
121 return dom_sid_parse_talloc(mem_ctx, sid_codes[i].sid);
124 static const struct flag_map ace_types[] = {
125 { "AU", SEC_ACE_TYPE_SYSTEM_AUDIT },
126 { "AL", SEC_ACE_TYPE_SYSTEM_ALARM },
127 { "OA", SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT },
128 { "OD", SEC_ACE_TYPE_ACCESS_DENIED_OBJECT },
129 { "OU", SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT },
130 { "OL", SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT },
131 { "A", SEC_ACE_TYPE_ACCESS_ALLOWED },
132 { "D", SEC_ACE_TYPE_ACCESS_DENIED },
136 static const struct flag_map ace_flags[] = {
137 { "OI", SEC_ACE_FLAG_OBJECT_INHERIT },
138 { "CI", SEC_ACE_FLAG_CONTAINER_INHERIT },
139 { "NP", SEC_ACE_FLAG_NO_PROPAGATE_INHERIT },
140 { "IO", SEC_ACE_FLAG_INHERIT_ONLY },
141 { "ID", SEC_ACE_FLAG_INHERITED_ACE },
142 { "SA", SEC_ACE_FLAG_SUCCESSFUL_ACCESS },
143 { "FA", SEC_ACE_FLAG_FAILED_ACCESS },
147 static const struct flag_map ace_access_mask[] = {
148 { "RP", SEC_ADS_READ_PROP },
149 { "WP", SEC_ADS_WRITE_PROP },
150 { "CR", SEC_ADS_CONTROL_ACCESS },
151 { "CC", SEC_ADS_CREATE_CHILD },
152 { "DC", SEC_ADS_DELETE_CHILD },
153 { "LC", SEC_ADS_LIST },
154 { "LO", SEC_ADS_LIST_OBJECT },
155 { "RC", SEC_STD_READ_CONTROL },
156 { "WO", SEC_STD_WRITE_OWNER },
157 { "WD", SEC_STD_WRITE_DAC },
158 { "SD", SEC_STD_DELETE },
159 { "DT", SEC_ADS_DELETE_TREE },
160 { "SW", SEC_ADS_SELF_WRITE },
161 { "GA", SEC_GENERIC_ALL },
162 { "GR", SEC_GENERIC_READ },
163 { "GW", SEC_GENERIC_WRITE },
164 { "GX", SEC_GENERIC_EXECUTE },
170 return True on success, False on failure
171 note that this routine modifies the string
173 static BOOL sddl_decode_ace(TALLOC_CTX *mem_ctx, struct security_ace *ace, char *str,
174 const struct dom_sid *domain_sid)
184 /* parse out the 6 tokens */
187 char *ptr = strchr(str, ';');
188 if (ptr == NULL) return False;
195 if (!sddl_map_flags(ace_types, tok[0], &v, NULL)) {
201 if (!sddl_map_flags(ace_flags, tok[1], &v, NULL)) {
207 if (strncmp(tok[2], "0x", 2) == 0) {
208 ace->access_mask = strtol(tok[2], NULL, 16);
210 if (!sddl_map_flags(ace_access_mask, tok[2], &v, NULL)) {
213 ace->access_mask = v;
217 if (tok[3][0] != 0) {
218 NTSTATUS status = GUID_from_string(tok[3],
219 &ace->object.object.type.type);
220 if (!NT_STATUS_IS_OK(status)) {
223 ace->object.object.flags |= SEC_ACE_OBJECT_TYPE_PRESENT;
227 if (tok[4][0] != 0) {
228 NTSTATUS status = GUID_from_string(tok[4],
229 &ace->object.object.inherited_type.inherited_type);
230 if (!NT_STATUS_IS_OK(status)) {
233 ace->object.object.flags |= SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT;
238 sid = sddl_decode_sid(mem_ctx, &s, domain_sid);
243 talloc_steal(mem_ctx, sid->sub_auths);
249 static const struct flag_map acl_flags[] = {
250 { "P", SEC_DESC_DACL_PROTECTED },
251 { "AR", SEC_DESC_DACL_AUTO_INHERIT_REQ },
252 { "AI", SEC_DESC_DACL_AUTO_INHERITED },
259 static struct security_acl *sddl_decode_acl(struct security_descriptor *sd,
260 const char **sddlp, uint32_t *flags,
261 const struct dom_sid *domain_sid)
263 const char *sddl = *sddlp;
264 struct security_acl *acl;
269 acl = talloc_zero(sd, struct security_acl);
270 if (acl == NULL) return NULL;
271 acl->revision = SECURITY_ACL_REVISION_NT4;
273 if (isupper(sddl[0]) && sddl[1] == ':') {
274 /* its an empty ACL */
278 /* work out the ACL flags */
279 if (!sddl_map_flags(acl_flags, sddl, flags, &len)) {
286 while (*sddl == '(') {
288 len = strcspn(sddl+1, ")");
289 astr = talloc_strndup(acl, sddl+1, len);
290 if (astr == NULL || sddl[len+1] != ')') {
294 acl->aces = talloc_realloc(acl, acl->aces, struct security_ace,
296 if (acl->aces == NULL) {
300 if (!sddl_decode_ace(acl->aces, &acl->aces[acl->num_aces],
315 decode a security descriptor in SDDL format
317 struct security_descriptor *sddl_decode(TALLOC_CTX *mem_ctx, const char *sddl,
318 const struct dom_sid *domain_sid)
320 struct security_descriptor *sd;
321 sd = talloc_zero(mem_ctx, struct security_descriptor);
323 sd->revision = SECURITY_DESCRIPTOR_REVISION_1;
324 sd->type = SEC_DESC_SELF_RELATIVE;
329 if (sddl[1] != ':') goto failed;
334 if (sd->dacl != NULL) goto failed;
335 sd->dacl = sddl_decode_acl(sd, &sddl, &flags, domain_sid);
336 if (sd->dacl == NULL) goto failed;
337 sd->type |= flags | SEC_DESC_DACL_PRESENT;
340 if (sd->sacl != NULL) goto failed;
341 sd->sacl = sddl_decode_acl(sd, &sddl, &flags, domain_sid);
342 if (sd->sacl == NULL) goto failed;
343 /* this relies on the SEC_DESC_SACL_* flags being
344 1 bit shifted from the SEC_DESC_DACL_* flags */
345 sd->type |= (flags<<1) | SEC_DESC_SACL_PRESENT;
348 if (sd->owner_sid != NULL) goto failed;
349 sd->owner_sid = sddl_decode_sid(sd, &sddl, domain_sid);
350 if (sd->owner_sid == NULL) goto failed;
353 if (sd->group_sid != NULL) goto failed;
354 sd->group_sid = sddl_decode_sid(sd, &sddl, domain_sid);
355 if (sd->group_sid == NULL) goto failed;
363 DEBUG(2,("Badly formatted SDDL '%s'\n", sddl));
369 turn a set of flags into a string
371 static char *sddl_flags_to_string(TALLOC_CTX *mem_ctx, const struct flag_map *map,
372 uint32_t flags, BOOL check_all)
377 /* try to find an exact match */
378 for (i=0;map[i].name;i++) {
379 if (map[i].flag == flags) {
380 return talloc_strdup(mem_ctx, map[i].name);
384 s = talloc_strdup(mem_ctx, "");
387 for (i=0;map[i].name;i++) {
388 if ((flags & map[i].flag) != 0) {
389 s = talloc_asprintf_append(s, "%s", map[i].name);
390 if (s == NULL) goto failed;
391 flags &= ~map[i].flag;
395 if (check_all && flags != 0) {
407 encode a sid in SDDL format
409 static char *sddl_encode_sid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
410 const struct dom_sid *domain_sid)
415 sidstr = dom_sid_string(mem_ctx, sid);
416 if (sidstr == NULL) return NULL;
418 /* seen if its a well known sid */
419 for (i=0;sid_codes[i].sid;i++) {
420 if (strcmp(sidstr, sid_codes[i].sid) == 0) {
422 return talloc_strdup(mem_ctx, sid_codes[i].code);
426 /* or a well known rid in our domain */
427 if (dom_sid_in_domain(domain_sid, sid)) {
428 uint32_t rid = sid->sub_auths[sid->num_auths-1];
429 for (;i<ARRAY_SIZE(sid_codes);i++) {
430 if (rid == sid_codes[i].rid) {
432 return talloc_strdup(mem_ctx, sid_codes[i].code);
439 /* TODO: encode well known sids as two letter codes */
440 return dom_sid_string(mem_ctx, sid);
445 encode an ACE in SDDL format
447 static char *sddl_encode_ace(TALLOC_CTX *mem_ctx, const struct security_ace *ace,
448 const struct dom_sid *domain_sid)
452 const char *s_type="", *s_flags="", *s_mask="",
453 *s_object="", *s_iobject="", *s_trustee="";
455 tmp_ctx = talloc_new(mem_ctx);
456 if (tmp_ctx == NULL) {
457 DEBUG(0, ("talloc_new failed\n"));
461 s_type = sddl_flags_to_string(tmp_ctx, ace_types, ace->type, True);
462 if (s_type == NULL) goto failed;
464 s_flags = sddl_flags_to_string(tmp_ctx, ace_flags, ace->flags, True);
465 if (s_flags == NULL) goto failed;
467 s_mask = sddl_flags_to_string(tmp_ctx, ace_access_mask, ace->access_mask, True);
468 if (s_mask == NULL) {
469 s_mask = talloc_asprintf(tmp_ctx, "0x%08x", ace->access_mask);
470 if (s_mask == NULL) goto failed;
473 if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT ||
474 ace->type == SEC_ACE_TYPE_ACCESS_DENIED_OBJECT ||
475 ace->type == SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT ||
476 ace->type == SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT) {
477 if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
478 s_object = GUID_string(tmp_ctx, &ace->object.object.type.type);
479 if (s_object == NULL) goto failed;
482 if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
483 s_iobject = GUID_string(tmp_ctx, &ace->object.object.inherited_type.inherited_type);
484 if (s_iobject == NULL) goto failed;
488 s_trustee = sddl_encode_sid(tmp_ctx, &ace->trustee, domain_sid);
489 if (s_trustee == NULL) goto failed;
491 sddl = talloc_asprintf(mem_ctx, "%s;%s;%s;%s;%s;%s",
492 s_type, s_flags, s_mask, s_object, s_iobject, s_trustee);
495 talloc_free(tmp_ctx);
500 encode an ACL in SDDL format
502 static char *sddl_encode_acl(TALLOC_CTX *mem_ctx, const struct security_acl *acl,
503 uint32_t flags, const struct dom_sid *domain_sid)
508 /* add any ACL flags */
509 sddl = sddl_flags_to_string(mem_ctx, acl_flags, flags, False);
510 if (sddl == NULL) goto failed;
512 /* now the ACEs, encoded in braces */
513 for (i=0;i<acl->num_aces;i++) {
514 char *ace = sddl_encode_ace(sddl, &acl->aces[i], domain_sid);
515 if (ace == NULL) goto failed;
516 sddl = talloc_asprintf_append(sddl, "(%s)", ace);
517 if (sddl == NULL) goto failed;
530 encode a security descriptor to SDDL format
532 char *sddl_encode(TALLOC_CTX *mem_ctx, const struct security_descriptor *sd,
533 const struct dom_sid *domain_sid)
538 /* start with a blank string */
539 sddl = talloc_strdup(mem_ctx, "");
540 if (sddl == NULL) goto failed;
542 tmp_ctx = talloc_new(mem_ctx);
544 if (sd->owner_sid != NULL) {
545 char *sid = sddl_encode_sid(tmp_ctx, sd->owner_sid, domain_sid);
546 if (sid == NULL) goto failed;
547 sddl = talloc_asprintf_append(sddl, "O:%s", sid);
548 if (sddl == NULL) goto failed;
551 if (sd->group_sid != NULL) {
552 char *sid = sddl_encode_sid(tmp_ctx, sd->group_sid, domain_sid);
553 if (sid == NULL) goto failed;
554 sddl = talloc_asprintf_append(sddl, "G:%s", sid);
555 if (sddl == NULL) goto failed;
558 if ((sd->type & SEC_DESC_DACL_PRESENT) && sd->dacl != NULL) {
559 char *acl = sddl_encode_acl(tmp_ctx, sd->dacl, sd->type, domain_sid);
560 if (acl == NULL) goto failed;
561 sddl = talloc_asprintf_append(sddl, "D:%s", acl);
562 if (sddl == NULL) goto failed;
565 if ((sd->type & SEC_DESC_SACL_PRESENT) && sd->sacl != NULL) {
566 char *acl = sddl_encode_acl(tmp_ctx, sd->sacl, sd->type>>1, domain_sid);
567 if (acl == NULL) goto failed;
568 sddl = talloc_asprintf_append(sddl, "S:%s", acl);
569 if (sddl == NULL) goto failed;
572 talloc_free(tmp_ctx);