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
|
/** BEGIN COPYRIGHT BLOCK
* 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/>.
*
* Additional permission under GPLv3 section 7:
*
* In the following paragraph, "GPL" means the GNU General Public
* License, version 3 or any later version, and "Non-GPL Code" means
* code that is governed neither by the GPL nor a license
* compatible with the GPL.
*
* You may link the code of this Program with Non-GPL Code and convey
* linked combinations including the two, provided that such Non-GPL
* Code only links to the code of this Program through those well
* defined interfaces identified in the file named EXCEPTION found in
* the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline
* functions from the Approved Interfaces without causing the resulting
* work to be covered by the GPL. Only the copyright holders of this
* Program may make changes or additions to the list of Approved
* Interfaces.
*
* Authors:
* Nathaniel McCallum <npmccallum@redhat.com>
*
* Copyright (C) 2013 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <libotp.h>
#include <time.h>
#define PLUGIN_NAME "ipa-otp-lasttoken"
#define LOG(sev, ...) \
slapi_log_error(SLAPI_LOG_ ## sev, PLUGIN_NAME, \
"%s: %s\n", __func__, __VA_ARGS__), -1
static void *plugin_id;
static const Slapi_PluginDesc preop_desc = {
PLUGIN_NAME,
"FreeIPA",
"FreeIPA/1.0",
"Protect the user's last active token"
};
static bool
target_is_only_enabled_token(Slapi_PBlock *pb)
{
Slapi_DN *target_sdn = NULL;
Slapi_DN *token_sdn = NULL;
struct otptoken **tokens;
char *user_dn = NULL;
bool match;
/* Ignore internal operations. */
if (slapi_op_internal(pb))
return false;
/* Get the current user's SDN. */
slapi_pblock_get(pb, SLAPI_CONN_DN, &user_dn);
if (user_dn == NULL)
return false;
/* Get the SDN of the only enabled token. */
tokens = otptoken_find(plugin_id, user_dn, NULL, true, NULL);
if (tokens != NULL && tokens[0] != NULL && tokens[1] == NULL)
token_sdn = slapi_sdn_dup(otptoken_get_sdn(tokens[0]));
otptoken_free_array(tokens);
if (token_sdn == NULL)
return false;
/* Get the target SDN. */
slapi_pblock_get(pb, SLAPI_TARGET_SDN, &target_sdn);
if (target_sdn == NULL) {
slapi_sdn_free(&token_sdn);
return false;
}
/* Does the target SDN match the only enabled token SDN? */
match = slapi_sdn_compare(token_sdn, target_sdn) == 0;
slapi_sdn_free(&token_sdn);
return match;
}
static inline int
send_error(Slapi_PBlock *pb, int rc, char *errstr)
{
slapi_send_ldap_result(pb, rc, NULL, errstr, 0, NULL);
slapi_pblock_set(pb, SLAPI_RESULT_CODE, &rc);
return rc;
}
static int
preop_del(Slapi_PBlock *pb)
{
if (!target_is_only_enabled_token(pb))
return 0;
return send_error(pb, LDAP_UNWILLING_TO_PERFORM,
"Can't delete last active token");
}
static int
preop_mod(Slapi_PBlock *pb)
{
LDAPMod **mods = NULL;
if (!target_is_only_enabled_token(pb))
return 0;
/* Do not permit deactivation of the last active token. */
slapi_pblock_get(pb, SLAPI_MODIFY_MODS, &mods);
for (int i = 0; mods != NULL && mods[i] != NULL; i++) {
if (strcasecmp(mods[i]->mod_type, "ipatokenDisabled") == 0) {
return send_error(pb, LDAP_UNWILLING_TO_PERFORM,
"Can't disable last active token");
}
if (strcasecmp(mods[i]->mod_type, "ipatokenOwner") == 0) {
return send_error(pb, LDAP_UNWILLING_TO_PERFORM,
"Can't change last active token's owner");
}
if (strcasecmp(mods[i]->mod_type, "ipatokenNotBefore") == 0) {
return send_error(pb, LDAP_UNWILLING_TO_PERFORM,
"Can't change last active token's start time");
}
if (strcasecmp(mods[i]->mod_type, "ipatokenNotAfter") == 0) {
return send_error(pb, LDAP_UNWILLING_TO_PERFORM,
"Can't change last active token's end time");
}
}
return 0;
}
static int
preop_init(Slapi_PBlock *pb)
{
int ret = 0;
ret |= slapi_pblock_set(pb, SLAPI_PLUGIN_BE_TXN_PRE_DELETE_FN, preop_del);
ret |= slapi_pblock_set(pb, SLAPI_PLUGIN_BE_TXN_PRE_MODIFY_FN, preop_mod);
return ret;
}
int
ipa_otp_lasttoken_init(Slapi_PBlock *pb)
{
int ret = 0;
ret |= slapi_pblock_get(pb, SLAPI_PLUGIN_IDENTITY, &plugin_id);
ret |= slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION, SLAPI_PLUGIN_VERSION_01);
ret |= slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION, (void *) &preop_desc);
ret |= slapi_register_plugin("betxnpreoperation", 1, __func__, preop_init,
PLUGIN_NAME, NULL, plugin_id);
return ret;
}
|
