summaryrefslogtreecommitdiffstats
path: root/source3/winbindd/winbindd_getgroups.c
blob: b899bebe17035c191fb5d03bee8b27ebb4d7567f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/*
   Unix SMB/CIFS implementation.
   async implementation of WINBINDD_GETGROUPS
   Copyright (C) Volker Lendecke 2009

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "winbindd.h"
#include "passdb/lookup_sid.h" /* only for LOOKUP_NAME_NO_NSS flag */

struct winbindd_getgroups_state {
	struct tevent_context *ev;
	fstring domname;
	fstring username;
	struct dom_sid sid;
	enum lsa_SidType type;
	int num_sids;
	struct dom_sid *sids;
	int num_gids;
	gid_t *gids;
};

static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq);
static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq);
static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq);

struct tevent_req *winbindd_getgroups_send(TALLOC_CTX *mem_ctx,
					   struct tevent_context *ev,
					   struct winbindd_cli_state *cli,
					   struct winbindd_request *request)
{
	struct tevent_req *req, *subreq;
	struct winbindd_getgroups_state *state;
	char *domuser, *mapped_user;
	NTSTATUS status;

	req = tevent_req_create(mem_ctx, &state,
				struct winbindd_getgroups_state);
	if (req == NULL) {
		return NULL;
	}
	state->ev = ev;

	/* Ensure null termination */
	request->data.username[sizeof(request->data.username)-1]='\0';

	DEBUG(3, ("getgroups %s\n", request->data.username));

	domuser = request->data.username;

	status = normalize_name_unmap(state, domuser, &mapped_user);

	if (NT_STATUS_IS_OK(status)
	    || NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
		/* normalize_name_unmapped did something */
		domuser = mapped_user;
	}

	if (!parse_domain_user(domuser, state->domname, state->username)) {
		DEBUG(5, ("Could not parse domain user: %s\n", domuser));
		tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return tevent_req_post(req, ev);
	}

	subreq = wb_lookupname_send(state, ev, state->domname, state->username,
				    LOOKUP_NAME_NO_NSS);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, winbindd_getgroups_lookupname_done,
				req);
	return req;
}

static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct winbindd_getgroups_state *state = tevent_req_data(
		req, struct winbindd_getgroups_state);
	NTSTATUS status;

	status = wb_lookupname_recv(subreq, &state->sid, &state->type);
	TALLOC_FREE(subreq);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	subreq = wb_gettoken_send(state, state->ev, &state->sid);
	if (tevent_req_nomem(subreq, req)) {
		return;
	}
	tevent_req_set_callback(subreq, winbindd_getgroups_gettoken_done, req);
}

static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct winbindd_getgroups_state *state = tevent_req_data(
		req, struct winbindd_getgroups_state);
	NTSTATUS status;

	status = wb_gettoken_recv(subreq, state, &state->num_sids,
				  &state->sids);
	TALLOC_FREE(subreq);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	/*
	 * Convert the group SIDs to gids. state->sids[0] contains the user
	 * sid. If the idmap backend uses ID_TYPE_BOTH, we might need the
	 * the id of the user sid in the list of group sids, so map the
	 * complete token.
	 */

	subreq = wb_sids2xids_send(state, state->ev,
				   state->sids, state->num_sids);
	if (tevent_req_nomem(subreq, req)) {
		return;
	}
	tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
}

static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct winbindd_getgroups_state *state = tevent_req_data(
		req, struct winbindd_getgroups_state);
	NTSTATUS status;
	struct unixid *xids;
	int i;

	xids = talloc_array(state, struct unixid, state->num_sids);
	if (tevent_req_nomem(xids, req)) {
		return;
	}
	for (i=0; i < state->num_sids; i++) {
		xids[i].type = ID_TYPE_NOT_SPECIFIED;
		xids[i].id = UINT32_MAX;
	}

	status = wb_sids2xids_recv(subreq, xids);
	TALLOC_FREE(subreq);
	if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED) ||
	    NT_STATUS_EQUAL(status, STATUS_SOME_UNMAPPED))
	{
		status = NT_STATUS_OK;
	}
	if (tevent_req_nterror(req, status)) {
		return;
	}

	state->gids = talloc_array(state, gid_t, state->num_sids);
	if (tevent_req_nomem(state->gids, req)) {
		return;
	}
	state->num_gids = 0;

	for (i=0; i < state->num_sids; i++) {
		bool include_gid = false;
		const char *debug_missing = NULL;

		switch (xids[i].type) {
		case ID_TYPE_NOT_SPECIFIED:
			debug_missing = "not specified";
			break;
		case ID_TYPE_UID:
			if (i != 0) {
				debug_missing = "uid";
			}
			break;
		case ID_TYPE_GID:
		case ID_TYPE_BOTH:
			include_gid = true;
			break;
		}

		if (!include_gid) {
			if (debug_missing == NULL) {
				continue;
			}

			DEBUG(10, ("WARNING: skipping unix id (%u) for sid %s "
				   "from group list because the idmap type "
				   "is %s. "
				   "This might be a security problem when ACLs "
				   "contain DENY ACEs!\n",
				   (unsigned)xids[i].id,
				   sid_string_tos(&state->sids[i]),
				   debug_missing));
			continue;
		}

		state->gids[state->num_gids] = (gid_t)xids[i].id;
		state->num_gids += 1;
	}

	/*
	 * This should not fail, as it does not do any reallocation,
	 * just updating the talloc size.
	 */
	state->gids = talloc_realloc(state, state->gids, gid_t, state->num_gids);
	if (tevent_req_nomem(state->gids, req)) {
		return;
	}

	tevent_req_done(req);
}

NTSTATUS winbindd_getgroups_recv(struct tevent_req *req,
				 struct winbindd_response *response)
{
	struct winbindd_getgroups_state *state = tevent_req_data(
		req, struct winbindd_getgroups_state);
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		DEBUG(5, ("Could not convert sid %s: %s\n",
			  sid_string_dbg(&state->sid), nt_errstr(status)));
		return status;
	}

	response->data.num_entries = state->num_gids;

	if (state->num_gids > 0) {
		response->extra_data.data = talloc_move(response,
							&state->gids);
		response->length += state->num_gids * sizeof(gid_t);
	}
	return NT_STATUS_OK;
}