summaryrefslogtreecommitdiff
path: root/source3/winbindd/idmap_nss.c
blob: bfef7bb399fe5930bf818bbb48fc18ef8596d80a (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
/* 
   Unix SMB/CIFS implementation.

   idmap NSS backend

   Copyright (C) Simo Sorce 2006

   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 "nsswitch/winbind_client.h"
#include "idmap.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP

/*****************************
 Initialise idmap database. 
*****************************/

static NTSTATUS idmap_nss_int_init(struct idmap_domain *dom,
				   const char *params)
{	
	return NT_STATUS_OK;
}

/**********************************
 lookup a set of unix ids. 
**********************************/

static NTSTATUS idmap_nss_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
{
	int i;

	/* initialize the status to avoid suprise */
	for (i = 0; ids[i]; i++) {
		ids[i]->status = ID_UNKNOWN;
	}

	for (i = 0; ids[i]; i++) {
		struct passwd *pw;
		struct group *gr;
		const char *name;
		enum lsa_SidType type;
		bool ret;

		switch (ids[i]->xid.type) {
		case ID_TYPE_UID:
			pw = getpwuid((uid_t)ids[i]->xid.id);

			if (!pw) {
				ids[i]->status = ID_UNMAPPED;
				continue;
			}
			name = pw->pw_name;
			break;
		case ID_TYPE_GID:
			gr = getgrgid((gid_t)ids[i]->xid.id);

			if (!gr) {
				ids[i]->status = ID_UNMAPPED;
				continue;
			}
			name = gr->gr_name;
			break;
		default: /* ?? */
			ids[i]->status = ID_UNKNOWN;
			continue;
		}

		/* by default calls to winbindd are disabled
		   the following call will not recurse so this is safe */
		(void)winbind_on();
		/* Lookup name from PDC using lsa_lookup_names() */
		ret = winbind_lookup_name(dom->name, name, ids[i]->sid, &type);
		(void)winbind_off();

		if (!ret) {
			/* TODO: how do we know if the name is really not mapped,
			 * or something just failed ? */
			ids[i]->status = ID_UNMAPPED;
			continue;
		}

		switch (type) {
		case SID_NAME_USER:
			if (ids[i]->xid.type == ID_TYPE_UID) {
				ids[i]->status = ID_MAPPED;
			}
			break;

		case SID_NAME_DOM_GRP:
		case SID_NAME_ALIAS:
		case SID_NAME_WKN_GRP:
			if (ids[i]->xid.type == ID_TYPE_GID) {
				ids[i]->status = ID_MAPPED;
			}
			break;

		default:
			ids[i]->status = ID_UNKNOWN;
			break;
		}
	}
	return NT_STATUS_OK;
}

/**********************************
 lookup a set of sids. 
**********************************/

static NTSTATUS idmap_nss_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
{
	int i;

	/* initialize the status to avoid suprise */
	for (i = 0; ids[i]; i++) {
		ids[i]->status = ID_UNKNOWN;
	}

	for (i = 0; ids[i]; i++) {
		struct group *gr;
		enum lsa_SidType type;
		char *name = NULL;
		bool ret;

		/* by default calls to winbindd are disabled
		   the following call will not recurse so this is safe */
		(void)winbind_on();
		ret = winbind_lookup_sid(talloc_tos(), ids[i]->sid, NULL,
					 (const char **)&name, &type);
		(void)winbind_off();

		if (!ret) {
			/* TODO: how do we know if the name is really not mapped,
			 * or something just failed ? */
			ids[i]->status = ID_UNMAPPED;
			continue;
		}

		switch (type) {
		case SID_NAME_USER: {
			struct passwd *pw;

			/* this will find also all lower case name and use username level */

			pw = Get_Pwnam_alloc(talloc_tos(), name);
			if (pw) {
				ids[i]->xid.id = pw->pw_uid;
				ids[i]->xid.type = ID_TYPE_UID;
				ids[i]->status = ID_MAPPED;
			}
			TALLOC_FREE(pw);
			break;
		}

		case SID_NAME_DOM_GRP:
		case SID_NAME_ALIAS:
		case SID_NAME_WKN_GRP:

			gr = getgrnam(name);
			if (gr) {
				ids[i]->xid.id = gr->gr_gid;
				ids[i]->xid.type = ID_TYPE_GID;
				ids[i]->status = ID_MAPPED;
			}
			break;

		default:
			ids[i]->status = ID_UNKNOWN;
			break;
		}
		TALLOC_FREE(name);
	}
	return NT_STATUS_OK;
}

/**********************************
 Close the idmap tdb instance
**********************************/

static struct idmap_methods nss_methods = {

	.init = idmap_nss_int_init,
	.unixids_to_sids = idmap_nss_unixids_to_sids,
	.sids_to_unixids = idmap_nss_sids_to_unixids,
};

NTSTATUS idmap_nss_init(void)
{
	return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "nss", &nss_methods);
}