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
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
* Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
* Copyright (C) 2007 Carsten Valdemar Munk <carsten.munk+inspircd@gmail.com>
*
* This file is part of InspIRCd. InspIRCd 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, version 2.
*
* 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 "inspircd.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include <ldap.h>
#ifdef _WIN32
# pragma comment(lib, "ldap.lib")
# pragma comment(lib, "lber.lib")
#endif
/* $ModDesc: Adds the ability to authenticate opers via LDAP */
/* $LinkerFlags: -lldap */
class ModuleLDAPAuth : public Module
{
std::string base;
std::string ldapserver;
std::string username;
std::string password;
int searchscope;
LDAP *conn;
public:
void init()
{
conn = NULL;
Implementation eventlist[] = { I_OnRehash, I_OnPassCompare };
ServerInstance->Modules->Attach(eventlist, this, 2);
OnRehash(NULL);
}
virtual ~ModuleLDAPAuth()
{
if (conn)
ldap_unbind_ext(conn, NULL, NULL);
}
virtual void OnRehash(User* user)
{
ConfigTag* tag = ServerInstance->Config->ConfValue("ldapoper");
base = tag->getString("baserdn");
ldapserver = tag->getString("server");
std::string scope = tag->getString("searchscope");
username = tag->getString("binddn");
password = tag->getString("bindaut");
if (scope == "base")
searchscope = LDAP_SCOPE_BASE;
else if (scope == "onelevel")
searchscope = LDAP_SCOPE_ONELEVEL;
else searchscope = LDAP_SCOPE_SUBTREE;
Connect();
}
bool Connect()
{
if (conn != NULL)
ldap_unbind_ext(conn, NULL, NULL);
int res, v = LDAP_VERSION3;
res = ldap_initialize(&conn, ldapserver.c_str());
if (res != LDAP_SUCCESS)
{
conn = NULL;
return false;
}
res = ldap_set_option(conn, LDAP_OPT_PROTOCOL_VERSION, (void *)&v);
if (res != LDAP_SUCCESS)
{
ldap_unbind_ext(conn, NULL, NULL);
conn = NULL;
return false;
}
return true;
}
virtual ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
{
if (hashtype == "ldap")
{
if (LookupOper(data, input))
/* This is an ldap oper and has been found, claim the OPER command */
return MOD_RES_ALLOW;
else
return MOD_RES_DENY;
}
/* We don't know this oper! */
return MOD_RES_PASSTHRU;
}
bool LookupOper(const std::string &what, const std::string &opassword)
{
if (conn == NULL)
if (!Connect())
return false;
int res;
char* authpass = strdup(password.c_str());
// bind anonymously if no bind DN and authentication are given in the config
struct berval cred;
cred.bv_val = authpass;
cred.bv_len = password.length();
if ((res = ldap_sasl_bind_s(conn, username.c_str(), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) != LDAP_SUCCESS)
{
if (res == LDAP_SERVER_DOWN)
{
// Attempt to reconnect if the connection dropped
ServerInstance->SNO->WriteToSnoMask('a', "LDAP server has gone away - reconnecting...");
Connect();
res = ldap_sasl_bind_s(conn, username.c_str(), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL);
}
if (res != LDAP_SUCCESS)
{
free(authpass);
ldap_unbind_ext(conn, NULL, NULL);
conn = NULL;
return false;
}
}
free(authpass);
LDAPMessage *msg, *entry;
if ((res = ldap_search_ext_s(conn, base.c_str(), searchscope, what.c_str(), NULL, 0, NULL, NULL, NULL, 0, &msg)) != LDAP_SUCCESS)
{
return false;
}
if (ldap_count_entries(conn, msg) > 1)
{
ldap_msgfree(msg);
return false;
}
if ((entry = ldap_first_entry(conn, msg)) == NULL)
{
ldap_msgfree(msg);
return false;
}
authpass = strdup(opassword.c_str());
cred.bv_val = authpass;
cred.bv_len = opassword.length();
if ((res = ldap_sasl_bind_s(conn, ldap_get_dn(conn, entry), LDAP_SASL_SIMPLE, &cred, NULL, NULL, NULL)) == LDAP_SUCCESS)
{
free(authpass);
ldap_msgfree(msg);
return true;
}
else
{
free(authpass);
ldap_msgfree(msg);
return false;
}
}
virtual Version GetVersion()
{
return Version("Adds the ability to authenticate opers via LDAP", VF_VENDOR);
}
};
MODULE_INIT(ModuleLDAPAuth)
|
