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
|
/* eurephia-auth.c -- Main OpenVPN plugin functions. The API level between OpenVPN and eurephia-auth
*
* GPLv2 - Copyright (C) 2008 David Sommerseth <dazo@users.sourceforge.net>
*
* 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; version 2
* of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sqlite3.h>
#include "openvpn-plugin.h"
#include <eurephiadb.h>
#include <eurephia.h>
#ifdef ENABLE_DEBUG // To avoid compiler warnings when ENABLE_DEBUG is not defined
static const char *plugin_type_name(const int type)
{
switch (type)
{
case OPENVPN_PLUGIN_UP:
return "PLUGIN_UP";
case OPENVPN_PLUGIN_DOWN:
return "PLUGIN_DOWN";
case OPENVPN_PLUGIN_ROUTE_UP:
return "PLUGIN_ROUTE_UP";
case OPENVPN_PLUGIN_IPCHANGE:
return "PLUGIN_IPCHANGE";
case OPENVPN_PLUGIN_TLS_VERIFY:
return "PLUGIN_TLS_VERIFY";
case OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY:
return "PLUGIN_AUTH_USER_PASS_VERIFY";
case OPENVPN_PLUGIN_CLIENT_CONNECT:
return "PLUGIN_CLIENT_CONNECT";
case OPENVPN_PLUGIN_CLIENT_DISCONNECT:
return "PLUGIN_CLIENT_DISCONNECT";
case OPENVPN_PLUGIN_LEARN_ADDRESS:
return "PLUGIN_LEARN_ADDRESS";
default:
return "(UNKNOWN PLUGIN CODE)";
}
}
static void dump_env(FILE *f, const char *prefix, const char *envp[]) {
int i;
for (i = 0; envp[i]; i++) {
#ifdef SHOW_SECRETS
fprintf(f, "%s%s\n", prefix, envp[i]);
#else
fprintf(f, "%s%s\n", prefix ,
(strncmp(envp[i], "password=", 9) == 0) ? "password=xxxxxxx" : envp[i]);
#endif // SHOW_SECRETS
}
}
#endif // ENABLE_DEBUG
// daemonize if "daemon" environment variable is set.
// preserves stderr access after being daemonized, but
// only if "daemon_log_direct" enviroment variable is set.
//
static void daemonize(const char *envp[])
{
const char *daemon_string = get_env(NULL, 0, envp, "daemon");
if( daemon_string && daemon_string[0] == '1' ) {
const char *log_redirect = get_env(NULL, 0, envp, "daemon_log_redirect");
int fd = -1;
if( log_redirect && log_redirect[0] == '1' ) {
fd = dup (2);
}
if( daemon(0, 0) < 0 ) {
fprintf(stderr, "eurephia-auth: daemonization failed\n");
} else if( fd >= 3 ) {
dup2(fd, 2);
close(fd);
}
}
}
OPENVPN_EXPORT openvpn_plugin_handle_t openvpn_plugin_open_v1(unsigned int *type_mask,
const char *argv[], const char *envp[])
{
eurephiaCTX *context = NULL;
#ifdef MEMWATCH
mwStatistics(3);
#warning MEMWATCH enabled
#endif
// Define what will trigger eurephia
*type_mask = OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY)
| OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_TLS_VERIFY)
| OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_CLIENT_CONNECT)
| OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_CLIENT_DISCONNECT)
| OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_LEARN_ADDRESS);
// Setup a eurephia context
context = eurephiaInit(argv);
// Daemonize if requested
daemonize(envp);
return (openvpn_plugin_handle_t) context;
}
OPENVPN_EXPORT int openvpn_plugin_func_v1(openvpn_plugin_handle_t handle,
const int type,
const char *argv[], const char *envp[])
{
eurephiaCTX *ctx = (eurephiaCTX *) handle;
int result = 0;
if( (ctx == NULL) || (ctx->dbc == NULL) || (ctx->dbc->dbhandle == NULL) ) {
return OPENVPN_PLUGIN_FUNC_ERROR;
}
DEBUG(ctx, 10, "openvpn_plugin_func_v1(ctx, %s, ...)", plugin_type_name(type));
#ifdef ENABLE_DEBUG
if( ctx->loglevel >= 30 ) {
dump_env(ctx->log, "ENV: ", envp);
dump_env(ctx->log, "ARG: ", argv);
}
#endif
switch( type ) {
case OPENVPN_PLUGIN_TLS_VERIFY:
result = eurephia_tlsverify(ctx, envp, argv[1]);
break;
case OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY:
result = eurephia_userauth(ctx, envp);
break;
case OPENVPN_PLUGIN_CLIENT_CONNECT:
result = eurephia_connect(ctx, envp);
break;
case OPENVPN_PLUGIN_CLIENT_DISCONNECT:
result = eurephia_disconnect(ctx, envp);
break;
case OPENVPN_PLUGIN_LEARN_ADDRESS:
result = eurephia_learn_address(ctx, argv[1], argv[2], envp);
break;
default:
eurephia_log(ctx, LOG_FATAL, 0, "Unknown OPENVPN_PLUGIN type: %i", type);
break;
}
return (result == 1 ? OPENVPN_PLUGIN_FUNC_SUCCESS : OPENVPN_PLUGIN_FUNC_ERROR);
}
OPENVPN_EXPORT void openvpn_plugin_close_v1(openvpn_plugin_handle_t handle)
{
eurephiaCTX *ctx = (eurephiaCTX *) handle;
eurephiaShutdown(ctx);
}
|
