1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*
27 * SMB server interface to idmap
28 * (smb_idmap_get..., smb_idmap_batch_...)
29 *
30 * There are three implementations of this interface:
31 * uts/common/fs/smbsrv/smb_idmap.c (smbsrv kmod)
32 * lib/smbsrv/libfksmbsrv/common/fksmb_idmap.c (libfksmbsrv)
33 * lib/smbsrv/libsmb/common/smb_idmap.c (libsmb)
34 *
35 * There are enough differences (relative to the code size)
36 * that it's more trouble than it's worth to merge them.
37 *
38 * This one differs from the others in that it:
39 * calls idmap interfaces (libidmap)
40 * uses kmem_... interfaces (libfakekernel)
41 * uses cmn_err instead of syslog, etc.
42 */
43
44 #include <sys/param.h>
45 #include <sys/types.h>
46
47 #include <smbsrv/smb_kproto.h>
48 #include <smbsrv/smb_idmap.h>
49
50 static int smb_idmap_batch_binsid(smb_idmap_batch_t *sib);
51
52 /*
53 * Report an idmap error.
54 */
55 void
56 smb_idmap_check(const char *s, idmap_stat stat)
57 {
58 if (stat != IDMAP_SUCCESS) {
59 if (s == NULL)
60 s = "smb_idmap_check";
61
62 cmn_err(CE_NOTE, "%s: %d", s, (int)stat);
63 }
64 }
65
66 /*
67 * smb_idmap_getsid
68 *
69 * Tries to get a mapping for the given uid/gid
70 * Allocates ->sim_domsid
71 */
72 idmap_stat
73 smb_idmap_getsid(uid_t id, int idtype, smb_sid_t **sid)
74 {
75 smb_idmap_batch_t sib;
76 idmap_stat stat;
77
78 stat = smb_idmap_batch_create(&sib, 1, SMB_IDMAP_ID2SID);
79 if (stat != IDMAP_SUCCESS)
80 return (stat);
81
82 stat = smb_idmap_batch_getsid(sib.sib_idmaph, &sib.sib_maps[0],
83 id, idtype);
84
85 if (stat != IDMAP_SUCCESS) {
86 smb_idmap_batch_destroy(&sib);
87 return (stat);
88 }
89
90 stat = smb_idmap_batch_getmappings(&sib);
91
92 if (stat != IDMAP_SUCCESS) {
93 smb_idmap_batch_destroy(&sib);
94 return (stat);
95 }
96
97 *sid = smb_sid_dup(sib.sib_maps[0].sim_sid);
98
99 smb_idmap_batch_destroy(&sib);
100
101 return (IDMAP_SUCCESS);
102 }
103
104 /*
105 * smb_idmap_getid
106 *
107 * Tries to get a mapping for the given SID
108 */
109 idmap_stat
110 smb_idmap_getid(smb_sid_t *sid, uid_t *id, int *id_type)
111 {
112 smb_idmap_batch_t sib;
113 smb_idmap_t *sim;
114 idmap_stat stat;
115
116 stat = smb_idmap_batch_create(&sib, 1, SMB_IDMAP_SID2ID);
117 if (stat != IDMAP_SUCCESS)
118 return (stat);
119
120 sim = &sib.sib_maps[0];
121 sim->sim_id = id;
122 stat = smb_idmap_batch_getid(sib.sib_idmaph, sim, sid, *id_type);
123 if (stat != IDMAP_SUCCESS) {
124 smb_idmap_batch_destroy(&sib);
125 return (stat);
126 }
127
128 stat = smb_idmap_batch_getmappings(&sib);
129
130 if (stat != IDMAP_SUCCESS) {
131 smb_idmap_batch_destroy(&sib);
132 return (stat);
133 }
134
135 *id_type = sim->sim_idtype;
136 smb_idmap_batch_destroy(&sib);
137
138 return (IDMAP_SUCCESS);
139 }
140
141 /*
142 * smb_idmap_batch_create
143 *
144 * Creates and initializes the context for batch ID mapping.
145 */
146 idmap_stat
147 smb_idmap_batch_create(smb_idmap_batch_t *sib, uint16_t nmap, int flags)
148 {
149 idmap_stat stat;
150
151 if (!sib)
152 return (IDMAP_ERR_ARG);
153
154 bzero(sib, sizeof (smb_idmap_batch_t));
155 stat = idmap_get_create(&sib->sib_idmaph);
156
157 if (stat != IDMAP_SUCCESS) {
158 smb_idmap_check("idmap_get_create", stat);
159 return (stat);
160 }
161
162 sib->sib_flags = flags;
163 sib->sib_nmap = nmap;
164 sib->sib_size = nmap * sizeof (smb_idmap_t);
165 sib->sib_maps = kmem_zalloc(sib->sib_size, KM_SLEEP);
166
167 return (IDMAP_SUCCESS);
168 }
169
170 /*
171 * smb_idmap_batch_destroy
172 *
173 * Frees the batch ID mapping context.
174 */
175 void
176 smb_idmap_batch_destroy(smb_idmap_batch_t *sib)
177 {
178 int i;
179
180 if (sib == NULL)
181 return;
182
183 if (sib->sib_idmaph) {
184 idmap_get_destroy(sib->sib_idmaph);
185 sib->sib_idmaph = NULL;
186 }
187
188 if (sib->sib_maps == NULL)
189 return;
190
191 if (sib->sib_flags & SMB_IDMAP_ID2SID) {
192 /*
193 * SIDs are allocated only when mapping
194 * UID/GID to SIDs
195 */
196 for (i = 0; i < sib->sib_nmap; i++) {
197 smb_sid_free(sib->sib_maps[i].sim_sid);
198 /* from strdup() in libidmap */
199 free(sib->sib_maps[i].sim_domsid);
200 }
201 }
202
203 if (sib->sib_size && sib->sib_maps) {
204 kmem_free(sib->sib_maps, sib->sib_size);
205 sib->sib_maps = NULL;
206 }
207 }
208
209 /*
210 * smb_idmap_batch_getid
211 *
212 * Queue a request to map the given SID to a UID or GID.
213 *
214 * sim->sim_id should point to variable that's supposed to
215 * hold the returned UID/GID. This needs to be setup by caller
216 * of this function.
217 * If requested ID type is known, it's passed as 'idtype',
218 * if it's unknown it'll be returned in sim->sim_idtype.
219 */
220 idmap_stat
221 smb_idmap_batch_getid(idmap_get_handle_t *idmaph, smb_idmap_t *sim,
222 smb_sid_t *sid, int idtype)
223 {
224 char sidstr[SMB_SID_STRSZ];
225 idmap_stat stat;
226 int flag = 0;
227
228 if (idmaph == NULL || sim == NULL || sid == NULL)
229 return (IDMAP_ERR_ARG);
230
231 smb_sid_tostr(sid, sidstr);
232 if (smb_sid_splitstr(sidstr, &sim->sim_rid) != 0)
233 return (IDMAP_ERR_SID);
234 sim->sim_domsid = sidstr;
235 sim->sim_idtype = idtype;
236
237 switch (idtype) {
238 case SMB_IDMAP_USER:
239 stat = idmap_get_uidbysid(idmaph, sim->sim_domsid,
240 sim->sim_rid, flag, sim->sim_id, &sim->sim_stat);
241 smb_idmap_check("idmap_get_uidbysid", stat);
242 break;
243
244 case SMB_IDMAP_GROUP:
245 stat = idmap_get_gidbysid(idmaph, sim->sim_domsid,
246 sim->sim_rid, flag, sim->sim_id, &sim->sim_stat);
247 smb_idmap_check("idmap_get_gidbysid", stat);
248 break;
249
250 case SMB_IDMAP_UNKNOWN:
251 stat = idmap_get_pidbysid(idmaph, sim->sim_domsid,
252 sim->sim_rid, flag, sim->sim_id, &sim->sim_idtype,
253 &sim->sim_stat);
254 smb_idmap_check("idmap_get_pidbysid", stat);
255 break;
256
257 default:
258 stat = IDMAP_ERR_ARG;
259 break;
260 }
261
262 /* This was copied by idmap_get_Xbysid. */
263 sim->sim_domsid = NULL;
264
265 return (stat);
266 }
267
268 /*
269 * smb_idmap_batch_getsid
270 *
271 * Queue a request to map the given UID/GID to a SID.
272 *
273 * sim->sim_domsid and sim->sim_rid will contain the mapping
274 * result upon successful process of the batched request.
275 * NB: sim_domsid allocated by strdup, here or in libidmap
276 */
277 idmap_stat
278 smb_idmap_batch_getsid(idmap_get_handle_t *idmaph, smb_idmap_t *sim,
279 uid_t id, int idtype)
280 {
281 idmap_stat stat;
282 int flag = 0;
283
284 if (!idmaph || !sim)
285 return (IDMAP_ERR_ARG);
286
287 switch (idtype) {
288 case SMB_IDMAP_USER:
289 stat = idmap_get_sidbyuid(idmaph, id, flag,
290 &sim->sim_domsid, &sim->sim_rid, &sim->sim_stat);
291 smb_idmap_check("idmap_get_sidbyuid", stat);
292 break;
293
294 case SMB_IDMAP_GROUP:
295 stat = idmap_get_sidbygid(idmaph, id, flag,
296 &sim->sim_domsid, &sim->sim_rid, &sim->sim_stat);
297 smb_idmap_check("idmap_get_sidbygid", stat);
298 break;
299
300 case SMB_IDMAP_OWNERAT:
301 /* Current Owner S-1-5-32-766 */
302 sim->sim_domsid = strdup(NT_BUILTIN_DOMAIN_SIDSTR);
303 sim->sim_rid = SECURITY_CURRENT_OWNER_RID;
304 sim->sim_stat = IDMAP_SUCCESS;
305 stat = IDMAP_SUCCESS;
306 break;
307
308 case SMB_IDMAP_GROUPAT:
309 /* Current Group S-1-5-32-767 */
310 sim->sim_domsid = strdup(NT_BUILTIN_DOMAIN_SIDSTR);
311 sim->sim_rid = SECURITY_CURRENT_GROUP_RID;
312 sim->sim_stat = IDMAP_SUCCESS;
313 stat = IDMAP_SUCCESS;
314 break;
315
316 case SMB_IDMAP_EVERYONE:
317 /* Everyone S-1-1-0 */
318 sim->sim_domsid = strdup(NT_WORLD_AUTH_SIDSTR);
319 sim->sim_rid = 0;
320 sim->sim_stat = IDMAP_SUCCESS;
321 stat = IDMAP_SUCCESS;
322 break;
323
324 default:
325 return (IDMAP_ERR_ARG);
326 }
327
328 return (stat);
329 }
330
331 /*
332 * smb_idmap_batch_getmappings
333 *
334 * trigger ID mapping service to get the mappings for queued
335 * requests.
336 *
337 * Checks the result of all the queued requests.
338 */
339 idmap_stat
340 smb_idmap_batch_getmappings(smb_idmap_batch_t *sib)
341 {
342 idmap_stat stat = IDMAP_SUCCESS;
343 smb_idmap_t *sim;
344 int i;
345
346 if ((stat = idmap_get_mappings(sib->sib_idmaph)) != IDMAP_SUCCESS) {
347 smb_idmap_check("idmap_get_mappings", stat);
348 return (stat);
349 }
350
351 /*
352 * Check the status for all the queued requests
353 */
354 for (i = 0, sim = sib->sib_maps; i < sib->sib_nmap; i++, sim++) {
355 if (sim->sim_stat != IDMAP_SUCCESS) {
356 if (sib->sib_flags == SMB_IDMAP_SID2ID) {
357 cmn_err(CE_NOTE, "[%d] %d (%d)",
358 sim->sim_idtype,
359 sim->sim_rid,
360 sim->sim_stat);
361 }
362 return (sim->sim_stat);
363 }
364 }
365
366 if (smb_idmap_batch_binsid(sib) != 0)
367 stat = IDMAP_ERR_OTHER;
368
369 return (stat);
370 }
371
372 /*
373 * smb_idmap_batch_binsid
374 *
375 * Convert sidrids to binary sids
376 *
377 * Returns 0 if successful and non-zero upon failure.
378 */
379 static int
380 smb_idmap_batch_binsid(smb_idmap_batch_t *sib)
381 {
382 smb_sid_t *sid;
383 smb_idmap_t *sim;
384 int i;
385
386 if (sib->sib_flags & SMB_IDMAP_SID2ID)
387 /* This operation is not required */
388 return (0);
389
390 sim = sib->sib_maps;
391 for (i = 0; i < sib->sib_nmap; sim++, i++) {
392 if (sim->sim_domsid == NULL)
393 return (-1);
394
395 sid = smb_sid_fromstr(sim->sim_domsid);
396 if (sid == NULL)
397 return (-1);
398
399 sim->sim_sid = smb_sid_splice(sid, sim->sim_rid);
400 smb_sid_free(sid);
401 }
402
403 return (0);
404 }