f87d3ebe796d92a94f0c3a55255c2868a95935f8
[ira/wip.git] / libcli / security / util_sid.c
1 /*
2    Unix SMB/CIFS implementation.
3    Samba utility functions
4    Copyright (C) Andrew Tridgell                1992-1998
5    Copyright (C) Luke Kenneth Caseson Leighton  1998-1999
6    Copyright (C) Jeremy Allison                 1999
7    Copyright (C) Stefan (metze) Metzmacher      2002
8    Copyright (C) Simo Sorce                     2002
9    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005
10    Copyright (C) Andrew Bartlett                2010
11
12    This program is free software; you can redistribute it and/or modify
13    it under the terms of the GNU General Public License as published by
14    the Free Software Foundation; either version 3 of the License, or
15    (at your option) any later version.
16
17    This program is distributed in the hope that it will be useful,
18    but WITHOUT ANY WARRANTY; without even the implied warranty of
19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20    GNU General Public License for more details.
21
22    You should have received a copy of the GNU General Public License
23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
24 */
25
26 #include "includes.h"
27 #include "../librpc/gen_ndr/ndr_security.h"
28 #include "../librpc/gen_ndr/netlogon.h"
29 #include "../libcli/security/security.h"
30
31 /*
32  * Some useful sids, more well known sids can be found at
33  * http://support.microsoft.com/kb/243330/EN-US/
34  */
35
36
37 const struct dom_sid global_sid_World_Domain =               /* Everyone domain */
38 { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
39 const struct dom_sid global_sid_World =                      /* Everyone */
40 { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
41 const struct dom_sid global_sid_Local_Authority =            /* Local Authority */
42 { 1, 0, {0,0,0,0,0,2}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
43 const struct dom_sid global_sid_Creator_Owner_Domain =       /* Creator Owner domain */
44 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
45 const struct dom_sid global_sid_NT_Authority =                  /* NT Authority */
46 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
47 const struct dom_sid global_sid_System =                        /* System */
48 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
49 const struct dom_sid global_sid_NULL =                          /* NULL sid */
50 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
51 const struct dom_sid global_sid_Authenticated_Users =   /* All authenticated rids */
52 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
53 #if 0
54 /* for documentation */
55 const struct dom_sid global_sid_Restriced =                     /* Restriced Code */
56 { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
57 #endif
58 const struct dom_sid global_sid_Network =                       /* Network rids */
59 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
60
61 const struct dom_sid global_sid_Creator_Owner =         /* Creator Owner */
62 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
63 const struct dom_sid global_sid_Creator_Group =         /* Creator Group */
64 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
65 const struct dom_sid global_sid_Anonymous =                     /* Anonymous login */
66 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
67 const struct dom_sid global_sid_Enterprise_DCs =                /* Enterprise DCs */
68 { 1, 1, {0,0,0,0,0,5}, {9,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
69 const struct dom_sid global_sid_Builtin =                       /* Local well-known domain */
70 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
71 const struct dom_sid global_sid_Builtin_Administrators =        /* Builtin administrators */
72 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
73 const struct dom_sid global_sid_Builtin_Users =         /* Builtin users */
74 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
75 const struct dom_sid global_sid_Builtin_Guests =                /* Builtin guest users */
76 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
77 const struct dom_sid global_sid_Builtin_Power_Users =   /* Builtin power users */
78 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
79 const struct dom_sid global_sid_Builtin_Account_Operators =     /* Builtin account operators */
80 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
81 const struct dom_sid global_sid_Builtin_Server_Operators =      /* Builtin server operators */
82 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
83 const struct dom_sid global_sid_Builtin_Print_Operators =       /* Builtin print operators */
84 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
85 const struct dom_sid global_sid_Builtin_Backup_Operators =      /* Builtin backup operators */
86 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
87 const struct dom_sid global_sid_Builtin_Replicator =            /* Builtin replicator */
88 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
89 const struct dom_sid global_sid_Builtin_PreWin2kAccess =        /* Builtin pre win2k access */
90 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
91
92 const struct dom_sid global_sid_Unix_Users =                    /* Unmapped Unix users */
93 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
94 const struct dom_sid global_sid_Unix_Groups =                   /* Unmapped Unix groups */
95 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
96
97 /* Unused, left here for documentary purposes */
98 #if 0
99 #define SECURITY_NULL_SID_AUTHORITY    0
100 #define SECURITY_WORLD_SID_AUTHORITY   1
101 #define SECURITY_LOCAL_SID_AUTHORITY   2
102 #define SECURITY_CREATOR_SID_AUTHORITY 3
103 #define SECURITY_NT_AUTHORITY          5
104 #endif
105
106 static struct dom_sid system_sid_array[1] =
107 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
108 static const struct security_token system_token = {
109         .num_sids       = ARRAY_SIZE(system_sid_array),
110         .sids           = system_sid_array,
111         .privilege_mask = SE_ALL_PRIVS
112 };
113
114 /****************************************************************************
115  Lookup string names for SID types.
116 ****************************************************************************/
117
118 static const struct {
119         enum lsa_SidType sid_type;
120         const char *string;
121 } sid_name_type[] = {
122         {SID_NAME_USE_NONE, "None"},
123         {SID_NAME_USER, "User"},
124         {SID_NAME_DOM_GRP, "Domain Group"},
125         {SID_NAME_DOMAIN, "Domain"},
126         {SID_NAME_ALIAS, "Local Group"},
127         {SID_NAME_WKN_GRP, "Well-known Group"},
128         {SID_NAME_DELETED, "Deleted Account"},
129         {SID_NAME_INVALID, "Invalid Account"},
130         {SID_NAME_UNKNOWN, "UNKNOWN"},
131         {SID_NAME_COMPUTER, "Computer"}
132 };
133
134 const char *sid_type_lookup(uint32_t sid_type)
135 {
136         int i;
137
138         /* Look through list */
139         for (i=0; i < ARRAY_SIZE(sid_name_type); i++) {
140                 if (sid_name_type[i].sid_type == sid_type) {
141                         return sid_name_type[i].string;
142                 }
143         }
144
145         /* Default return */
146         return "SID *TYPE* is INVALID";
147 }
148
149 /**************************************************************************
150  Create the SYSTEM token.
151 ***************************************************************************/
152
153 const struct security_token *get_system_token(void)
154 {
155         return &system_token;
156 }
157
158 bool sid_compose(struct dom_sid *dst, const struct dom_sid *domain_sid, uint32_t rid)
159 {
160         sid_copy(dst, domain_sid);
161         return sid_append_rid(dst, rid);
162 }
163
164 /*****************************************************************
165  Removes the last rid from the end of a sid
166 *****************************************************************/
167
168 bool sid_split_rid(struct dom_sid *sid, uint32_t *rid)
169 {
170         if (sid->num_auths > 0) {
171                 sid->num_auths--;
172                 if (rid != NULL) {
173                         *rid = sid->sub_auths[sid->num_auths];
174                 }
175                 return true;
176         }
177         return false;
178 }
179
180 /*****************************************************************
181  Return the last rid from the end of a sid
182 *****************************************************************/
183
184 bool sid_peek_rid(const struct dom_sid *sid, uint32_t *rid)
185 {
186         if (!sid || !rid)
187                 return false;
188
189         if (sid->num_auths > 0) {
190                 *rid = sid->sub_auths[sid->num_auths - 1];
191                 return true;
192         }
193         return false;
194 }
195
196 /*****************************************************************
197  Return the last rid from the end of a sid
198  and check the sid against the exp_dom_sid
199 *****************************************************************/
200
201 bool sid_peek_check_rid(const struct dom_sid *exp_dom_sid, const struct dom_sid *sid, uint32_t *rid)
202 {
203         if (!exp_dom_sid || !sid || !rid)
204                 return false;
205
206         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
207                 return false;
208         }
209
210         if (sid_compare_domain(exp_dom_sid, sid)!=0){
211                 *rid=(-1);
212                 return false;
213         }
214
215         return sid_peek_rid(sid, rid);
216 }
217
218 /*****************************************************************
219  Copies a sid
220 *****************************************************************/
221
222 void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
223 {
224         int i;
225
226         ZERO_STRUCTP(dst);
227
228         dst->sid_rev_num = src->sid_rev_num;
229         dst->num_auths = src->num_auths;
230
231         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
232
233         for (i = 0; i < src->num_auths; i++)
234                 dst->sub_auths[i] = src->sub_auths[i];
235 }
236
237 /*****************************************************************
238  Parse a on-the-wire SID (in a DATA_BLOB) to a struct dom_sid.
239 *****************************************************************/
240
241 bool sid_blob_parse(DATA_BLOB in, struct dom_sid *sid)
242 {
243         enum ndr_err_code ndr_err;
244         ndr_err = ndr_pull_struct_blob_all(&in, NULL, sid,
245                                            (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
246         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
247                 return false;
248         }
249         return true;
250 }
251
252 /*****************************************************************
253  Parse a on-the-wire SID to a struct dom_sid.
254 *****************************************************************/
255
256 bool sid_parse(const char *inbuf, size_t len, struct dom_sid *sid)
257 {
258         DATA_BLOB in = data_blob_const(inbuf, len);
259         return sid_blob_parse(in, sid);
260 }
261
262 /*****************************************************************
263  See if 2 SIDs are in the same domain
264  this just compares the leading sub-auths
265 *****************************************************************/
266
267 int sid_compare_domain(const struct dom_sid *sid1, const struct dom_sid *sid2)
268 {
269         int n, i;
270
271         n = MIN(sid1->num_auths, sid2->num_auths);
272
273         for (i = n-1; i >= 0; --i)
274                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
275                         return sid1->sub_auths[i] - sid2->sub_auths[i];
276
277         return dom_sid_compare_auth(sid1, sid2);
278 }
279
280 /********************************************************************
281  Add SID to an array SIDs
282 ********************************************************************/
283
284 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
285                           struct dom_sid **sids, uint32_t *num)
286 {
287         *sids = talloc_realloc(mem_ctx, *sids, struct dom_sid,
288                                (*num)+1);
289         if (*sids == NULL) {
290                 *num = 0;
291                 return NT_STATUS_NO_MEMORY;
292         }
293
294         sid_copy(&((*sids)[*num]), sid);
295         *num += 1;
296
297         return NT_STATUS_OK;
298 }
299
300
301 /********************************************************************
302  Add SID to an array SIDs ensuring that it is not already there
303 ********************************************************************/
304
305 NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
306                                  struct dom_sid **sids, uint32_t *num_sids)
307 {
308         uint32_t i;
309
310         for (i=0; i<(*num_sids); i++) {
311                 if (dom_sid_compare(sid, &(*sids)[i]) == 0)
312                         return NT_STATUS_OK;
313         }
314
315         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
316 }
317
318 /********************************************************************
319  Remove SID from an array
320 ********************************************************************/
321
322 void del_sid_from_array(const struct dom_sid *sid, struct dom_sid **sids,
323                         uint32_t *num)
324 {
325         struct dom_sid *sid_list = *sids;
326         uint32_t i;
327
328         for ( i=0; i<*num; i++ ) {
329
330                 /* if we find the SID, then decrement the count
331                    and break out of the loop */
332
333                 if (dom_sid_equal(sid, &sid_list[i])) {
334                         *num -= 1;
335                         break;
336                 }
337         }
338
339         /* This loop will copy the remainder of the array
340            if i < num of sids in the array */
341
342         for ( ; i<*num; i++ ) {
343                 sid_copy( &sid_list[i], &sid_list[i+1] );
344         }
345
346         return;
347 }
348
349 bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
350                              uint32_t rid, uint32_t **pp_rids, size_t *p_num)
351 {
352         size_t i;
353
354         for (i=0; i<*p_num; i++) {
355                 if ((*pp_rids)[i] == rid)
356                         return true;
357         }
358
359         *pp_rids = talloc_realloc(mem_ctx, *pp_rids, uint32_t, *p_num+1);
360
361         if (*pp_rids == NULL) {
362                 *p_num = 0;
363                 return false;
364         }
365
366         (*pp_rids)[*p_num] = rid;
367         *p_num += 1;
368         return true;
369 }
370
371 bool is_null_sid(const struct dom_sid *sid)
372 {
373         static const struct dom_sid null_sid = {0};
374         return dom_sid_equal(sid, &null_sid);
375 }