m4: Don't AC_MSG_ERROR when too old python is found
[kai/samba.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_Creator_Owner_Domain =       /* Creator Owner domain */
42 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
43 const struct dom_sid global_sid_NT_Authority =                  /* NT Authority */
44 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
45 const struct dom_sid global_sid_System =                        /* System */
46 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
47 const struct dom_sid global_sid_NULL =                          /* NULL sid */
48 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
49 const struct dom_sid global_sid_Authenticated_Users =   /* All authenticated rids */
50 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
51 #if 0
52 /* for documentation */
53 const struct dom_sid global_sid_Restriced =                     /* Restriced Code */
54 { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
55 #endif
56 const struct dom_sid global_sid_Network =                       /* Network rids */
57 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
58
59 const struct dom_sid global_sid_Creator_Owner =         /* Creator Owner */
60 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
61 const struct dom_sid global_sid_Creator_Group =         /* Creator Group */
62 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
63 const struct dom_sid global_sid_Anonymous =                     /* Anonymous login */
64 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
65 const struct dom_sid global_sid_Enterprise_DCs =                /* Enterprise DCs */
66 { 1, 1, {0,0,0,0,0,5}, {9,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
67 const struct dom_sid global_sid_Builtin =                       /* Local well-known domain */
68 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
69 const struct dom_sid global_sid_Builtin_Administrators =        /* Builtin administrators */
70 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
71 const struct dom_sid global_sid_Builtin_Users =         /* Builtin users */
72 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
73 const struct dom_sid global_sid_Builtin_Guests =                /* Builtin guest users */
74 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
75 const struct dom_sid global_sid_Builtin_Power_Users =   /* Builtin power users */
76 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
77 const struct dom_sid global_sid_Builtin_Account_Operators =     /* Builtin account operators */
78 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
79 const struct dom_sid global_sid_Builtin_Server_Operators =      /* Builtin server operators */
80 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
81 const struct dom_sid global_sid_Builtin_Print_Operators =       /* Builtin print operators */
82 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
83 const struct dom_sid global_sid_Builtin_Backup_Operators =      /* Builtin backup operators */
84 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
85 const struct dom_sid global_sid_Builtin_Replicator =            /* Builtin replicator */
86 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
87 const struct dom_sid global_sid_Builtin_PreWin2kAccess =        /* Builtin pre win2k access */
88 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
89
90 const struct dom_sid global_sid_Unix_Users =                    /* Unmapped Unix users */
91 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
92 const struct dom_sid global_sid_Unix_Groups =                   /* Unmapped Unix groups */
93 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
94
95 /* Unused, left here for documentary purposes */
96 #if 0
97 #define SECURITY_NULL_SID_AUTHORITY    0
98 #define SECURITY_WORLD_SID_AUTHORITY   1
99 #define SECURITY_LOCAL_SID_AUTHORITY   2
100 #define SECURITY_CREATOR_SID_AUTHORITY 3
101 #define SECURITY_NT_AUTHORITY          5
102 #endif
103
104 static struct dom_sid system_sid_array[1] =
105 { { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
106 static const struct security_token system_token = {
107         .num_sids       = ARRAY_SIZE(system_sid_array),
108         .sids           = system_sid_array,
109         .privilege_mask = SE_ALL_PRIVS
110 };
111
112 /****************************************************************************
113  Lookup string names for SID types.
114 ****************************************************************************/
115
116 static const struct {
117         enum lsa_SidType sid_type;
118         const char *string;
119 } sid_name_type[] = {
120         {SID_NAME_USE_NONE, "None"},
121         {SID_NAME_USER, "User"},
122         {SID_NAME_DOM_GRP, "Domain Group"},
123         {SID_NAME_DOMAIN, "Domain"},
124         {SID_NAME_ALIAS, "Local Group"},
125         {SID_NAME_WKN_GRP, "Well-known Group"},
126         {SID_NAME_DELETED, "Deleted Account"},
127         {SID_NAME_INVALID, "Invalid Account"},
128         {SID_NAME_UNKNOWN, "UNKNOWN"},
129         {SID_NAME_COMPUTER, "Computer"},
130
131         {(enum lsa_SidType)0, NULL}
132 };
133
134 const char *sid_type_lookup(uint32_t sid_type)
135 {
136         int i = 0;
137
138         /* Look through list */
139         while(sid_name_type[i].sid_type != 0) {
140                 if (sid_name_type[i].sid_type == sid_type)
141                         return sid_name_type[i].string;
142                 i++;
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                 *rid = sid->sub_auths[sid->num_auths];
173                 return true;
174         }
175         return false;
176 }
177
178 /*****************************************************************
179  Return the last rid from the end of a sid
180 *****************************************************************/
181
182 bool sid_peek_rid(const struct dom_sid *sid, uint32_t *rid)
183 {
184         if (!sid || !rid)
185                 return false;
186
187         if (sid->num_auths > 0) {
188                 *rid = sid->sub_auths[sid->num_auths - 1];
189                 return true;
190         }
191         return false;
192 }
193
194 /*****************************************************************
195  Return the last rid from the end of a sid
196  and check the sid against the exp_dom_sid
197 *****************************************************************/
198
199 bool sid_peek_check_rid(const struct dom_sid *exp_dom_sid, const struct dom_sid *sid, uint32_t *rid)
200 {
201         if (!exp_dom_sid || !sid || !rid)
202                 return false;
203
204         if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
205                 return false;
206         }
207
208         if (sid_compare_domain(exp_dom_sid, sid)!=0){
209                 *rid=(-1);
210                 return false;
211         }
212
213         return sid_peek_rid(sid, rid);
214 }
215
216 /*****************************************************************
217  Copies a sid
218 *****************************************************************/
219
220 void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
221 {
222         int i;
223
224         ZERO_STRUCTP(dst);
225
226         dst->sid_rev_num = src->sid_rev_num;
227         dst->num_auths = src->num_auths;
228
229         memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
230
231         for (i = 0; i < src->num_auths; i++)
232                 dst->sub_auths[i] = src->sub_auths[i];
233 }
234
235 /*****************************************************************
236  Parse a on-the-wire SID (in a DATA_BLOB) to a struct dom_sid.
237 *****************************************************************/
238
239 bool sid_blob_parse(DATA_BLOB in, struct dom_sid *sid)
240 {
241         enum ndr_err_code ndr_err;
242         ndr_err = ndr_pull_struct_blob_all(&in, NULL, sid,
243                                            (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
244         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
245                 return false;
246         }
247         return true;
248 }
249
250 /*****************************************************************
251  Parse a on-the-wire SID to a struct dom_sid.
252 *****************************************************************/
253
254 bool sid_parse(const char *inbuf, size_t len, struct dom_sid *sid)
255 {
256         DATA_BLOB in = data_blob_const(inbuf, len);
257         return sid_blob_parse(in, sid);
258 }
259
260 /*****************************************************************
261  See if 2 SIDs are in the same domain
262  this just compares the leading sub-auths
263 *****************************************************************/
264
265 int sid_compare_domain(const struct dom_sid *sid1, const struct dom_sid *sid2)
266 {
267         int n, i;
268
269         n = MIN(sid1->num_auths, sid2->num_auths);
270
271         for (i = n-1; i >= 0; --i)
272                 if (sid1->sub_auths[i] != sid2->sub_auths[i])
273                         return sid1->sub_auths[i] - sid2->sub_auths[i];
274
275         return dom_sid_compare_auth(sid1, sid2);
276 }
277
278 /*****************************************************************
279  Compare two sids.
280 *****************************************************************/
281
282 bool sid_equal(const struct dom_sid *sid1, const struct dom_sid *sid2)
283 {
284         return dom_sid_compare(sid1, sid2) == 0;
285 }
286
287 /********************************************************************
288  Add SID to an array SIDs
289 ********************************************************************/
290
291 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
292                           struct dom_sid **sids, uint32_t *num)
293 {
294         *sids = talloc_realloc(mem_ctx, *sids, struct dom_sid,
295                                (*num)+1);
296         if (*sids == NULL) {
297                 *num = 0;
298                 return NT_STATUS_NO_MEMORY;
299         }
300
301         sid_copy(&((*sids)[*num]), sid);
302         *num += 1;
303
304         return NT_STATUS_OK;
305 }
306
307
308 /********************************************************************
309  Add SID to an array SIDs ensuring that it is not already there
310 ********************************************************************/
311
312 NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
313                                  struct dom_sid **sids, uint32_t *num_sids)
314 {
315         size_t i;
316
317         for (i=0; i<(*num_sids); i++) {
318                 if (dom_sid_compare(sid, &(*sids)[i]) == 0)
319                         return NT_STATUS_OK;
320         }
321
322         return add_sid_to_array(mem_ctx, sid, sids, num_sids);
323 }
324
325 /********************************************************************
326  Remove SID from an array
327 ********************************************************************/
328
329 void del_sid_from_array(const struct dom_sid *sid, struct dom_sid **sids, size_t *num)
330 {
331         struct dom_sid *sid_list = *sids;
332         size_t i;
333
334         for ( i=0; i<*num; i++ ) {
335
336                 /* if we find the SID, then decrement the count
337                    and break out of the loop */
338
339                 if ( sid_equal(sid, &sid_list[i]) ) {
340                         *num -= 1;
341                         break;
342                 }
343         }
344
345         /* This loop will copy the remainder of the array
346            if i < num of sids ni the array */
347
348         for ( ; i<*num; i++ )
349                 sid_copy( &sid_list[i], &sid_list[i+1] );
350
351         return;
352 }
353
354 bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
355                              uint32_t rid, uint32_t **pp_rids, size_t *p_num)
356 {
357         size_t i;
358
359         for (i=0; i<*p_num; i++) {
360                 if ((*pp_rids)[i] == rid)
361                         return true;
362         }
363
364         *pp_rids = talloc_realloc(mem_ctx, *pp_rids, uint32_t, *p_num+1);
365
366         if (*pp_rids == NULL) {
367                 *p_num = 0;
368                 return false;
369         }
370
371         (*pp_rids)[*p_num] = rid;
372         *p_num += 1;
373         return true;
374 }
375
376 bool is_null_sid(const struct dom_sid *sid)
377 {
378         static const struct dom_sid null_sid = {0};
379         return sid_equal(sid, &null_sid);
380 }