source: vendor/current/source3/winbindd/wb_getgrsid.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 6.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 async getgrsid
4 Copyright (C) Volker Lendecke 2009
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include "includes.h"
21#include "winbindd.h"
22#include "librpc/gen_ndr/ndr_winbind_c.h"
23#include "../libcli/security/security.h"
24
25struct wb_getgrsid_state {
26 struct tevent_context *ev;
27 struct dom_sid sid;
28 int max_nesting;
29 const char *domname;
30 const char *name;
31 enum lsa_SidType type;
32 gid_t gid;
33 struct talloc_dict *members;
34};
35
36static void wb_getgrsid_lookupsid_done(struct tevent_req *subreq);
37static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq);
38static void wb_getgrsid_got_members(struct tevent_req *subreq);
39
40struct tevent_req *wb_getgrsid_send(TALLOC_CTX *mem_ctx,
41 struct tevent_context *ev,
42 const struct dom_sid *group_sid,
43 int max_nesting)
44{
45 struct tevent_req *req, *subreq;
46 struct wb_getgrsid_state *state;
47
48 req = tevent_req_create(mem_ctx, &state, struct wb_getgrsid_state);
49 if (req == NULL) {
50 return NULL;
51 }
52 sid_copy(&state->sid, group_sid);
53 state->ev = ev;
54 state->max_nesting = max_nesting;
55
56 if (lp_winbind_trusted_domains_only()) {
57 struct winbindd_domain *our_domain = find_our_domain();
58
59 if (dom_sid_compare_domain(group_sid, &our_domain->sid) == 0) {
60 DEBUG(7, ("winbindd_getgrsid: My domain -- rejecting "
61 "getgrsid() for %s\n", sid_string_tos(group_sid)));
62 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
63 return tevent_req_post(req, ev);
64 }
65 }
66
67 subreq = wb_lookupsid_send(state, ev, &state->sid);
68 if (tevent_req_nomem(subreq, req)) {
69 return tevent_req_post(req, ev);
70 }
71 tevent_req_set_callback(subreq, wb_getgrsid_lookupsid_done, req);
72 return req;
73}
74
75static void wb_getgrsid_lookupsid_done(struct tevent_req *subreq)
76{
77 struct tevent_req *req = tevent_req_callback_data(
78 subreq, struct tevent_req);
79 struct wb_getgrsid_state *state = tevent_req_data(
80 req, struct wb_getgrsid_state);
81 NTSTATUS status;
82
83 status = wb_lookupsid_recv(subreq, state, &state->type,
84 &state->domname, &state->name);
85 TALLOC_FREE(subreq);
86 if (tevent_req_nterror(req, status)) {
87 return;
88 }
89
90 switch (state->type) {
91 case SID_NAME_DOM_GRP:
92 case SID_NAME_ALIAS:
93 case SID_NAME_WKN_GRP:
94 /*
95 * also treat user-type SIDS (they might map to ID_TYPE_BOTH)
96 */
97 case SID_NAME_USER:
98 case SID_NAME_COMPUTER:
99 break;
100 default:
101 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
102 return;
103 }
104
105 subreq = wb_sids2xids_send(state, state->ev, &state->sid, 1);
106 if (tevent_req_nomem(subreq, req)) {
107 return;
108 }
109 tevent_req_set_callback(subreq, wb_getgrsid_sid2gid_done, req);
110}
111
112static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq)
113{
114 struct tevent_req *req = tevent_req_callback_data(
115 subreq, struct tevent_req);
116 struct wb_getgrsid_state *state = tevent_req_data(
117 req, struct wb_getgrsid_state);
118 NTSTATUS status;
119 struct unixid xids[1];
120
121 status = wb_sids2xids_recv(subreq, xids, ARRAY_SIZE(xids));
122 TALLOC_FREE(subreq);
123 if (tevent_req_nterror(req, status)) {
124 return;
125 }
126
127 /*
128 * We are filtering further down in sids2xids, but that filtering
129 * depends on the actual type of the sid handed in (as determined
130 * by lookupsids). Here we need to filter for the type of object
131 * actually requested, in this case uid.
132 */
133 if (!(xids[0].type == ID_TYPE_GID || xids[0].type == ID_TYPE_BOTH)) {
134 tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
135 return;
136 }
137
138 state->gid = (gid_t)xids[0].id;
139
140 if (state->type == SID_NAME_USER || state->type == SID_NAME_COMPUTER) {
141 /*
142 * special treatment for a user sid that is
143 * mapped to ID_TYPE_BOTH:
144 * create a group with the sid/xid as only member
145 */
146 const char *name;
147
148 if (xids[0].type != ID_TYPE_BOTH) {
149 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
150 return;
151 }
152
153 state->members = talloc_dict_init(state);
154 if (tevent_req_nomem(state->members, req)) {
155 return;
156 }
157
158 name = fill_domain_username_talloc(talloc_tos(),
159 state->domname,
160 state->name,
161 true /* can_assume */);
162 if (tevent_req_nomem(name, req)) {
163 return;
164 }
165
166 status = add_wbint_Principal_to_dict(talloc_tos(),
167 &state->sid,
168 &name,
169 state->type,
170 state->members);
171 if (!NT_STATUS_IS_OK(status)) {
172 tevent_req_nterror(req, status);
173 return;
174 }
175
176 tevent_req_done(req);
177 return;
178 }
179
180 /*
181 * the "regular" case of a group type sid.
182 */
183
184 subreq = wb_group_members_send(state, state->ev, &state->sid,
185 state->type, state->max_nesting);
186 if (tevent_req_nomem(subreq, req)) {
187 return;
188 }
189 tevent_req_set_callback(subreq, wb_getgrsid_got_members, req);
190}
191
192static void wb_getgrsid_got_members(struct tevent_req *subreq)
193{
194 struct tevent_req *req = tevent_req_callback_data(
195 subreq, struct tevent_req);
196 struct wb_getgrsid_state *state = tevent_req_data(
197 req, struct wb_getgrsid_state);
198 NTSTATUS status;
199
200 status = wb_group_members_recv(subreq, state, &state->members);
201 TALLOC_FREE(subreq);
202 if (tevent_req_nterror(req, status)) {
203 return;
204 }
205 tevent_req_done(req);
206}
207
208NTSTATUS wb_getgrsid_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
209 const char **domname, const char **name, gid_t *gid,
210 struct talloc_dict **members)
211{
212 struct wb_getgrsid_state *state = tevent_req_data(
213 req, struct wb_getgrsid_state);
214 NTSTATUS status;
215
216 if (tevent_req_is_nterror(req, &status)) {
217 return status;
218 }
219 *domname = talloc_move(mem_ctx, &state->domname);
220 *name = talloc_move(mem_ctx, &state->name);
221 *gid = state->gid;
222 *members = talloc_move(mem_ctx, &state->members);
223 return NT_STATUS_OK;
224}
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