-
Notifications
You must be signed in to change notification settings - Fork 2
/
radiusplugin.cpp
executable file
·1236 lines (1042 loc) · 49 KB
/
radiusplugin.cpp
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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* radiusplugin -- An OpenVPN plugin for do radius authentication
* and accounting.
*
* Copyright (C) 2005 EWE TEL GmbH/Ralf Luebben <ralfluebben@gmx.de>
*
* 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 2 of the License, or
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
//The callback functions of the plugin infrastructure.
#include "radiusplugin.h"
#define NEED_LIBGCRYPT_VERSION "1.2.0"
GCRY_THREAD_OPTION_PTHREAD_IMPL;
//define extern "C", so the c++ compiler generate a shared library
//which is compatible with c programms
extern "C"
{
/** The function is needed by the OpenVpn plugin model. The function is called
* when OpenVpn starts. In this case here two background process are
* started. One for authentication and one for accounting. The communication
* between the processes is made via sockets.
* You need a background process for accounting, because the interval
* in which accounting information is sent to the radius server in undependent
* from the main OpenVpn-process, so it is done by another process which schedule
* the accounting intervals. This process holds his root rights and it can set and
* deletes routes in the system routing table.
* The authentication process is a own process, too. So there is clear separation
* and it is undependent from the openvpn process.
* @param The type of plugin, maybe client_connect, client_disconnect, user_auth_pass_verify...
* @param A list of arguments which are set in the configuration file of openvpn in plugin line.
* @param The list of environmental variables, it is created by the OpenVpn-Process.
*/
//OPENVPN_EXPORT openvpn_plugin_handle_t
//openvpn_plugin_open_v1 ( unsigned int *type_mask, const char *argv[], const char *envp[] )
OPENVPN_PLUGIN_DEF openvpn_plugin_handle_t OPENVPN_PLUGIN_FUNC(openvpn_plugin_open_v2)(unsigned int *type_mask,
const char *argv[],
const char *envp[],
struct openvpn_plugin_string_list **return_list)
{
pid_t pid; /**<process number*/
int fd_auth[2]; /**<An array for the socket pair of the authentication process.*/
int fd_acct[2]; /**<An array for the socket pair of the accounting process.*/
AccountingProcess Acct; /**<The accounting background process object.*/
AuthenticationProcess Auth; /**<The authentication background process object.*/
PluginContext *context=NULL; /**<The context for this functions.*/
//list for additional arguments
struct name_value_list name_value_list;
//There must be one param, the name of the plugin file
const int base_parms = 1;
//Create the context.
try{
context=new PluginContext;
}
catch(...){
cerr << getTime() << "RADIUS-PLUGIN: New failed for PluginContext.\n";
return NULL;
}
// Get verbosity level from the environment.
const char *verb_string = get_env ( "verb", envp );
if ( verb_string )
context->setVerbosity ( atoi ( verb_string ) );
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Start AUTH-RADIUS-PLUGIN\n";
// Make sure we have one string argument: the .so name.
if ( string_array_len ( argv ) < base_parms )
{
cerr << getTime() << "RADIUS-PLUGIN: no .so name\n";
goto error;
}
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Found "<< string_array_len ( argv ) << " params.\n";
// See if we have optional name/value pairs for
// the plugin, this can only be the config file.
// path (default: -c /etc/openvpn/radiusplugin.conf)
name_value_list.len = 0;
if ( string_array_len ( argv ) > base_parms )
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Find params.\n";
//just a work around because argv[1] is the filename
name_value_list.data[0].name = "-c";
name_value_list.data[0].value = argv[1];
if ( strncmp ( name_value_list.data[0].name,"-c",2 ) ==0 )
{
//see in ./RadiusClass/error.h for errornumbers
//parse the radiusplugin config file
cerr << getTime() << "RADIUS-PLUGIN: Configfile name: "<< name_value_list.data[0].value << ".\n";
if ( context->radiusconf.parseConfigFile ( name_value_list.data[0].value ) !=0 or context->conf.parseConfigFile ( name_value_list.data[0].value ) !=0 )
{
cerr << getTime() << "RADIUS-PLUGIN: Bad config file or error in config.\n";
goto error;
}
}
else
{
cerr << getTime() << "RADIUS-PLUGIN: Bad argument for plugin.\n";
goto error;
}
}
else
{
//if there is no filename, use the default
//parse the radiusplugin config file
cerr << getTime() << "RADIUS-PLUGIN: Configfile name: /etc/openvpn/radiusplugin.cnf.\n";
if ( context->radiusconf.parseConfigFile ( "/etc/openvpn/radiusplugin.cnf" ) !=0 or context->conf.parseConfigFile ( "/etc/openvpn/radiusplugin.cnf" ) !=0 )
{
cerr << getTime() << "RADIUS-PLUGIN: Bad config file or error in config.\n";
goto error;
}
}
// Intercept the --auth-user-pass-verify, --client-connect and --client-disconnect callback.
if (context->conf.getAccountingOnly()==false)
{
*type_mask = OPENVPN_PLUGIN_MASK ( OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY ) | OPENVPN_PLUGIN_MASK ( OPENVPN_PLUGIN_CLIENT_CONNECT ) | OPENVPN_PLUGIN_MASK ( OPENVPN_PLUGIN_CLIENT_DISCONNECT );
}
else //just do the accounting
{
*type_mask = OPENVPN_PLUGIN_MASK ( OPENVPN_PLUGIN_CLIENT_CONNECT ) | OPENVPN_PLUGIN_MASK ( OPENVPN_PLUGIN_CLIENT_DISCONNECT );
}
// Make a socket for foreground and background processes
// to communicate.
//Authentication process:
if ( socketpair ( PF_UNIX, SOCK_DGRAM, 0, fd_auth ) == -1 )
{
cerr << getTime() << "RADIUS-PLUGIN: socketpair call failed for authentication process\n";
goto error;
}
//Accounting process:
if ( socketpair ( PF_UNIX, SOCK_DGRAM, 0, fd_acct ) == -1 )
{
cerr << getTime() << "RADIUS-PLUGIN: socketpair call failed for accounting process\n";
goto error;
}
// Fork off the privileged processes. It will remain privileged
// even after the foreground process drops its privileges.
// Fork the authentication process
pid = fork ();
if ( pid )
{
// Foreground Process (Parent)
int status;
//save the process id
context->setAuthPid ( pid );
// close our copy of child's socket
close ( fd_auth[1] );
/* don't let future subprocesses inherit child socket */
if ( fcntl ( fd_auth[0], F_SETFD, FD_CLOEXEC ) < 0 )
cerr << getTime() << "RADIUS-PLUGIN: Set FD_CLOEXEC flag on socket file descriptor failed\n";
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Start BACKGROUND Process for authentication with PID " << context->getAuthPid() << ".\n";
//save the socket number in the context
context->authsocketbackgr.setSocket ( fd_auth[0] );
//wait for background child process to initialize */
status = context->authsocketbackgr.recvInt();
if ( status != RESPONSE_INIT_SUCCEEDED )
{
//set the socket to -1 if the initialization failed
context->authsocketbackgr.setSocket ( -1 );
}
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Start AUTH-RADIUS-PLUGIN\n";
}
else
{
//Background Process
// close all parent fds except our socket back to parent
close_fds_except ( fd_auth[1] );
// Ignore most signals (the parent will receive them)
set_signals ();
//save the socket number in the context
context->authsocketforegr.setSocket ( fd_auth[1] );
//start the backgroung event loop for accounting
Auth.Authentication ( context );
//close the socket
close ( fd_auth[1] );
//free the context of the background process
delete context;
exit ( 0 );
return 0; // NOTREACHED
}
// Fork the accounting process
pid = fork ();
if ( pid )
{
// Foreground Process (Parent)
int status; //status if the background process
//save the pid
context->setAcctPid ( pid );
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Start BACKGROUND Process for accounting with PID " << context->getAcctPid() << ".\n";
// close our copy of child's socket */
close ( fd_acct[1] );
/* don't let future subprocesses inherit child socket */
if ( fcntl ( fd_acct[0], F_SETFD, FD_CLOEXEC ) < 0 )
cerr << getTime() << "RADIUS-PLUGIN: Set FD_CLOEXEC flag on socket file descriptor failed\n";
//save the socket number in the context
context->acctsocketbackgr.setSocket ( fd_acct[0] );
// wait for background child process to initialize */
status = context->acctsocketbackgr.recvInt();
if ( status != RESPONSE_INIT_SUCCEEDED )
{
//set the socket to -1 if the initialization failed
context->acctsocketbackgr.setSocket ( -1 );
}
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Start AUTH-RADIUS-PLUGIN\n";
}
else
{
//Background Process
// close all parent fds except our socket back to parent
close_fds_except ( fd_acct[1] );
// Ignore most signals (the parent will receive them)
set_signals ();
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: Start BACKGROUND Process for accounting\n";
// save the socket in the context
context->acctsocketforegr.setSocket ( fd_acct[1] );
//start the backgroung event loop for accounting
Acct.Accounting ( context );
//close the socket
close ( fd_acct[1] );
//free the context of the background process
delete context;
exit ( 0 );
return 0; // NOTREACHED
}
//return the context, this is used between the functions
//openvpn_plugin_open_v1
//openvpn_plugin_func_v1
//openvpn_plugin_close_v1
return ( openvpn_plugin_handle_t ) context;
error:
//delete the context
if ( context )
delete ( context );
return NULL;
}
/** This function is called from the OpenVpn process every time
* a event happens. The function handle the events (plugins)
* AUTH_USER_PASS_VERIFY, CLIENT_CONNECT, CLIENT_DISCONNECT.
* The function reads the information from the envriomental
* variable and sends the relevant information to the
* background processes.
* AUTH_USER_PASS_VERIFY: The user is authenticated by a radius server,
* if it succeeded the background sends back the framed ip, the routes and the acct_interim_interval
* for the user. Than the user is added to the context.
* CLIENT_CONNECT: The user is added to the accounting by
* sending the information to the background process.
* CLIENT_DISCONNECT: The user is deleted from the
* accounting by sending the information to the backgrund process.
* @param The handle which was allocated in the open function.
* @param The type of plugin, maybe client_conect, client_disconnect, auth_user_pass_verify
* @param A list of arguments which are set in the openvpn configuration file.
* @param The list of environmental variables, it is created by the OpenVpn-Process.
* @return An integer with the status of the function (OPENVPN_PLUGIN_FUNC_SUCCESS or OPENVPN_PLUGIN_FUNC_ERROR).
*/
//OPENVPN_EXPORT int
//openvpn_plugin_func_v1 ( openvpn_plugin_handle_t handle, const int type, const char *argv[], const char *envp[] )
OPENVPN_PLUGIN_DEF int OPENVPN_PLUGIN_FUNC(openvpn_plugin_func_v2)
(openvpn_plugin_handle_t handle,
const int type,
const char *argv[],
const char *envp[],
void *per_client_context,
struct openvpn_plugin_string_list **return_list)
{
//restore the context which was created at the function openvpn_plugin_open_v1
PluginContext *context = ( struct PluginContext * ) handle;
if (context->getStartThread())
{
pthread_cond_init (context->getCondSend(), NULL);
pthread_mutex_init (context->getMutexSend(), NULL);
pthread_cond_init (context->getCondRecv(), NULL);
pthread_mutex_init (context->getMutexRecv(), NULL);
if (context->conf.getAccountingOnly()==false && pthread_create(context->getThread(), NULL, &auth_user_pass_verify, (void *) context) != 0)
{
cerr << getTime() << "RADIUS-PLUGIN: Thread creation failed.\n";
return OPENVPN_PLUGIN_FUNC_ERROR;
//goto error;
}
pthread_mutex_lock(context->getMutexRecv());
context->setStartThread(false);
pthread_mutex_unlock(context->getMutexRecv());
}
UserPlugin *newuser=NULL; /**< A context for an new user.*/
UserPlugin *tmpuser=NULL; /**< A context for an temporary user.*/
string common_name; /**<A string for the common_name from the environment.*/
string untrusted_ip; /** untrusted_ip for ipv6 support **/
///////////// OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY
if ( type == OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY && ( context->authsocketbackgr.getSocket() ) >= 0 )
{
if ( DEBUG ( context->getVerbosity() ) )
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY is called."<< endl;
}
try
{
newuser=new UserPlugin();
get_user_env(context,type,envp, newuser);
if (newuser->getAuthControlFile().length() > 0 && context->conf.getUseAuthControlFile())
{
pthread_mutex_lock(context->getMutexSend());
context->addNewUser(newuser);
pthread_cond_signal( context->getCondSend( ));
pthread_mutex_unlock (context->getMutexSend());
return OPENVPN_PLUGIN_FUNC_DEFERRED;
}
else
{
pthread_mutex_lock(context->getMutexRecv());
pthread_mutex_lock(context->getMutexSend());
context->addNewUser(newuser);
pthread_cond_signal( context->getCondSend( ));
pthread_mutex_unlock (context->getMutexSend());
pthread_cond_wait( context->getCondRecv(), context->getMutexRecv());
pthread_mutex_unlock (context->getMutexRecv());
return context->getResult();
}
}
catch ( Exception &e )
{
cerr << getTime() << e;
}
catch (std::bad_alloc)
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: New failed on UserPlugin in OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY" << endl;
}
catch ( ... )
{
cerr << getTime() << "Unknown Exception!";
}
return OPENVPN_PLUGIN_FUNC_ERROR;
/////////////////////////// CLIENT_CONNECT
}
if ( type == OPENVPN_PLUGIN_CLIENT_CONNECT && context->acctsocketbackgr.getSocket() >= 0 )
{
if ( DEBUG ( context->getVerbosity() ) )
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: OPENVPN_PLUGIN_CLIENT_CONNECT is called.\n";
}
try
{
tmpuser=new UserPlugin();
get_user_env(context,type,envp, tmpuser);
//find the user in the context, he was added at the OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY
//string key=common_name + string ( "," ) +untrusted_ip+string ( ":" ) + string ( get_env ( "untrusted_port", envp ) );
newuser=context->findUser(tmpuser->getKey());
if (newuser == NULL)
{
if (context->conf.getAccountingOnly()==true) //Authentication part is missing, where this is done else
{
newuser=tmpuser;
newuser->setAuthenticated(true); //the plugin does not care about it
newuser->setPortnumber ( context->addNasPort() );
newuser->setSessionId ( createSessionId ( newuser ) );
//add the user to the context
context->addUser(newuser);
}
else
{
throw Exception ( "RADIUS-PLUGIN: FOREGROUND: User should be accounted but is unknown, should only occur if accountingonly=true.\n" );
}
}
else
delete(tmpuser);
//set the assigned ip as Framed-IP-Attribute of the user (see RFC2866, chapter 4.1 for more information)
if (get_env ( "ifconfig_pool_remote_ip", envp ) !=NULL)
{
newuser->setFramedIp ( string ( get_env ( "ifconfig_pool_remote_ip", envp ) ) );
}
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Set FramedIP to the IP (" << newuser->getFramedIp() << ") OpenVPN assigned to the user " << newuser->getUsername() << "\n";
//the user must be there and must be authenticated but not accounted
// isAccounted and isAuthenticated is true it is client connect for renegotiation, the user is already in the accounting process
if ( newuser!=NULL && newuser->isAccounted() ==false && newuser->isAuthenticated() )
{
//transform the integers to strings to send them over the socket
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Add user for accounting: username: " << newuser->getUsername() << ", commonname: " << newuser->getCommonname() << "\n";
//send information to the background process
context->acctsocketbackgr.send ( ADD_USER );
context->acctsocketbackgr.send ( newuser->getUsername() );
context->acctsocketbackgr.send ( newuser->getSessionId() );
context->acctsocketbackgr.send ( newuser->getPortnumber() );
context->acctsocketbackgr.send ( newuser->getCallingStationId() );
context->acctsocketbackgr.send ( newuser->getFramedIp() );
context->acctsocketbackgr.send ( newuser->getCommonname() );
context->acctsocketbackgr.send ( newuser->getAcctInterimInterval() );
context->acctsocketbackgr.send ( newuser->getFramedRoutes() );
context->acctsocketbackgr.send ( newuser->getKey() );
context->acctsocketbackgr.send ( newuser->getStatusFileKey());
context->acctsocketbackgr.send ( newuser->getUntrustedPort() );
context->acctsocketbackgr.send ( newuser->getVsaBuf(), newuser->getVsaBufLen() );
//get the response
const int status = context->acctsocketbackgr.recvInt();
if ( status == RESPONSE_SUCCEEDED )
{
newuser->setAccounted ( true );
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Accounting succeeded!\n";
return OPENVPN_PLUGIN_FUNC_SUCCESS;
}
else
{
//free the nasport
context->delNasPort ( newuser->getPortnumber() );
string error;
error="RADIUS-PLUGIN: FOREGROUND: Accounting failed for user:";
error+=newuser->getUsername();
error+="!\n";
//delete user from context
context->delUser ( newuser->getKey() );
throw Exception ( error );
}
}
else
{
string error;
error="RADIUS-PLUGIN: FOREGROUND: No user with this commonname or he is already authenticated: ";
error+=common_name;
error+="!\n";
throw Exception ( error );
}
}
catch ( Exception &e )
{
cerr << getTime() << e;
}
catch (std::bad_alloc)
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: New failed on UserPlugin in OPENVPN_PLUGIN_CLIENT_CONNECT" << endl;
}
catch ( ... )
{
cerr << getTime() << "Unknown Exception!";
}
return OPENVPN_PLUGIN_FUNC_ERROR;
}
///////////////////////// OPENVPN_PLUGIN_CLIENT_DISCONNECT
if ( type == OPENVPN_PLUGIN_CLIENT_DISCONNECT && context->acctsocketbackgr.getSocket() >= 0 )
{
if ( DEBUG ( context->getVerbosity() ) )
{
cerr << getTime() << "\n\nRADIUS-PLUGIN: FOREGROUND: OPENVPN_PLUGIN_CLIENT_DISCONNECT is called.\n";
}
try
{
tmpuser=new UserPlugin();
get_user_env(context,type,envp, tmpuser);
//find the user in the context, he was added at the OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY
//string key=common_name + string ( "," ) +untrusted_ip+string ( ":" ) + string ( get_env ( "untrusted_port", envp ) );
newuser=context->findUser(tmpuser->getKey());
delete(tmpuser);
if ( newuser!=NULL )
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Delete user from accounting: commonname: " << newuser->getKey() << "\n";
//send the information to the background process
context->acctsocketbackgr.send ( DEL_USER );
context->acctsocketbackgr.send ( newuser->getKey() );
//get the response
const int status = context->acctsocketbackgr.recvInt();
if ( status == RESPONSE_SUCCEEDED )
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Accounting for user with key" << newuser->getKey() << " stopped!\n";
//free the nasport
context->delNasPort ( newuser->getPortnumber() );
//delete user from context
context->delUser ( newuser->getKey() );
return OPENVPN_PLUGIN_FUNC_SUCCESS;
}
else
{
//free the nasport
context->delNasPort ( newuser->getPortnumber() );
//delete user from context
context->delUser ( newuser->getKey() );
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Error in ACCT Background Process!\n";
}
}
else
{
throw Exception ( "No user with this common_name!\n" );
}
}
catch ( Exception &e )
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND:" << e;
}
catch (std::bad_alloc)
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: New failed on UserPlugin in OPENVPN_PLUGIN_CLIENT_DISCONNECT" << endl;
}
catch ( ... )
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND:" << "Unknown Exception!\n";
}
}
return OPENVPN_PLUGIN_FUNC_ERROR;
}
/** The function is called when the OpenVpn process exits.
* A exit command is send to the background processes and
* the context is freed which was allocted in the open function.
* @param The handle which was allocated in the open function.
*/
OPENVPN_PLUGIN_DEF void OPENVPN_PLUGIN_FUNC(openvpn_plugin_close_v1)(openvpn_plugin_handle_t handle)
{
//restore the context
PluginContext *context = ( PluginContext * ) handle;
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: close\n";
if ( context->authsocketbackgr.getSocket() >= 0 )
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: close auth background process\n";
//tell background process to exit
try
{
context->authsocketbackgr.send ( COMMAND_EXIT );
}
catch ( Exception &e )
{
cerr << getTime() << e;
}
catch ( ... )
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND:" << "Unknown Exception!\n";
}
// wait for background process to exit
if ( context->getAuthPid() > 0 )
waitpid ( context->getAuthPid(), NULL, 0 );
}
if ( context->acctsocketbackgr.getSocket() >= 0 )
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: close acct background process.\n";
//tell background process to exit
try
{
context->acctsocketbackgr.send ( COMMAND_EXIT );
}
catch ( Exception &e )
{
cerr << getTime() << e;
}
catch ( ... )
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND:" << "Unknown Exception!\n";
}
// wait for background process to exit
if ( context->getAcctPid() > 0 )
waitpid ( context->getAcctPid(), NULL, 0 );
}
if (context->getStartThread()==false) //means the thread is running
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Stop auth thread .\n";
//stop the thread
pthread_mutex_lock(context->getMutexSend());
context->setStopThread(true);
pthread_cond_signal( context->getCondSend( ));
pthread_mutex_unlock(context->getMutexSend());
//wait for the thread to exit
pthread_join(*context->getThread(),NULL);
pthread_cond_destroy(context->getCondSend( ));
pthread_cond_destroy(context->getCondRecv( ));
pthread_mutex_destroy(context->getMutexSend());
pthread_mutex_destroy(context->getMutexRecv());
}
else
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: Auth thread was not started so far.\n";
}
delete context;
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND: DONE.\n";
}
}
/** Original function from the openvpn auth-pam plugin.
* Given an environmental variable name, search
* the envp array for its value, returning it
* if found or NULL otherwise.
* A field in the envp-array looks like: name=user1
* @param The name of the variable.
* @param The array with the environmental variables.
* @return A poniter to the variable value or NULL, if the varaible was not found.
*/
const char * get_env ( const char *name, const char *envp[] )
{
if ( envp )
{
int i;
const int namelen = strlen ( name );
for ( i = 0; envp[i]; ++i )
{
//compare the environmental names
if ( !strncmp ( envp[i], name, namelen ) )
{
//if the varibale is found
const char *cp = envp[i] + namelen;
//return the value behind the =
if ( *cp == '=' )
return cp + 1;
}
}
}
return NULL;
}
/** Original function from the openvpn auth-pam plugin.
* Return the length of a string array.
* @param Array
* @return The length of the arry.
*/
int string_array_len ( const char *array[] )
{
int i = 0;
if ( array )
{
while ( array[i] )
++i;
}
return i;
}
/** Original function from the openvpn auth-pam plugin.
* Close most of parent's fds.
* Keep stdin/stdout/stderr, plus one
* other fd which is presumed to be
* our pipe back to parent.
* Admittedly, a bit of a kludge,
* but posix doesn't give us a kind
* of FD_CLOEXEC which will stop
* fds from crossing a fork().
* @param The socket number which should not be closed.
*/
void close_fds_except ( int keep )
{
int i;
closelog ();
for ( i = 3; i <= 100; ++i )
{
if ( i != keep )
close ( i );
}
}
/** Original function from the openvpn auth-pam plugin.
* Usually we ignore signals, because our parent will
* deal with them.
*/
void set_signals ( void )
{
signal ( SIGTERM, SIG_DFL );
signal ( SIGINT, SIG_IGN );
signal ( SIGHUP, SIG_IGN );
signal ( SIGUSR1, SIG_IGN );
signal ( SIGUSR2, SIG_IGN );
signal ( SIGPIPE, SIG_IGN );
}
/** The function creates a md5 hash string as session ID over
* - user->commonname
* - user->callingstationid
* - user->untrustedport
* - time string from ctime(...)
* @param A pointer to the user for which the session ID is created.
* @return A string with the hash.
*/
string createSessionId ( UserPlugin * user )
{
unsigned char digest[16];
char text[33]; //The digest.
gcry_md_hd_t context; //the hash context
int i;
time_t rawtime;
string strtime;
ostringstream portnumber;
memset ( digest,0,16 );
if (!gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
{ /* No other library has already initialized libgcrypt. */
gcry_control(GCRYCTL_SET_THREAD_CBS,&gcry_threads_pthread);
if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) )
{
cerr << "libgcrypt is too old (need " << NEED_LIBGCRYPT_VERSION << ", have " << gcry_check_version (NULL) << ")\n";
}
/* Disable secure memory. */
gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
}
//build the hash
gcry_md_open ( &context, GCRY_MD_MD5, 0 );
gcry_md_write ( context, user->getCommonname().c_str(), user->getCommonname().length() );
gcry_md_write ( context, user->getCallingStationId().c_str(), user->getCallingStationId().length() );
gcry_md_write ( context, user->getUntrustedPort().c_str(), user->getUntrustedPort().length() );
gcry_md_write ( context, user->getUntrustedPort().c_str(), user->getUntrustedPort().length() );
portnumber << user->getPortnumber();
gcry_md_write ( context,portnumber.str().c_str(), portnumber.str().length());
time ( &rawtime );
strtime=ctime ( &rawtime );
gcry_md_write ( context, strtime.c_str(),strtime.length() );
memcpy ( digest, gcry_md_read ( context, GCRY_MD_MD5 ), 16 );
gcry_md_close ( context );
unsigned int h,l;
char *p=text;
unsigned char *c=digest;
for ( i=0; i<16; i++ )
{
h = *c / 16;
l = *c % 16;
c++;
*p++ = "01234567890ABCDEF"[h];
*p++ = "01234567890ABCDEF"[l];
}
text[32]='\0';
return string ( text );
}
/** The function implements the thread for authentication. If the auth_control_file is specified the thread writes the results in the
* auth_control_file, if the file is not specified the thread forward the OPENVPN_PLUGIN_FUNC_SUCCESS or OPENVPN_PLUGIN_FUNC_ERROR
* to the main process.
* @param _context The context pointer from OpenVPN.
*/
void * auth_user_pass_verify(void * c)
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Auth_user_pass_verify thread started."<< endl;
PluginContext * context = (PluginContext *) c;
//pthread_mutex_lock(context->getMutexSend());
//main thread loop for authentication
//ignore signals
static sigset_t signal_mask;
sigemptyset (&signal_mask);
sigaddset (&signal_mask, SIGINT);
sigaddset (&signal_mask, SIGTERM);
sigaddset (&signal_mask, SIGHUP);
sigaddset (&signal_mask, SIGUSR1);
sigaddset (&signal_mask, SIGUSR2);
sigaddset (&signal_mask, SIGPIPE);
pthread_sigmask (SIG_BLOCK, &signal_mask, NULL);
while (!context->getStopThread())
{
if (context->UserWaitingtoAuth()==false)
{
if ( DEBUG ( context->getVerbosity() ) ) cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Waiting for new user." << endl;
cout.flush();
pthread_mutex_lock(context->getMutexSend());
pthread_cond_wait(context->getCondSend(),context->getMutexSend());
pthread_mutex_unlock(context->getMutexSend());
}
if (context->getStopThread()==true)
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Stop signal received." << endl;
break;
}
if ( DEBUG ( context->getVerbosity() ) ) cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: New user from OpenVPN!" << endl;
//is the user already known?
UserPlugin *olduser=NULL; /**<A context for an already known user.*/
UserPlugin *newuser=NULL; /**<A context for the new user.*/
newuser = context->getNewUser();
olduser=context->findUser ( newuser->getKey() );
if ( olduser!=NULL ) //probably key renegotiation
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Renegotiation: username: "<< olduser->getUsername()
<< "\nRADIUS-PLUGIN: FOREGROUND THREAD:\t olduser ip: " << olduser->getCallingStationId()
<< "\nRADIUS-PLUGIN: FOREGROUND THREAD:\t olduser port: " << olduser->getUntrustedPort()
<< "\nRADIUS-PLUGIN: FOREGROUND THREAD:\t olduser FramedIP: " << olduser->getFramedIp()
<< "\nRADIUS-PLUGIN: FOREGROUND THREAD:\t newuser ip: " << olduser->getCallingStationId()
<< "\nRADIUS-PLUGIN: FOREGROUND THREAD:\t newuser port: " << olduser->getUntrustedPort()
<< "\n";
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: isAuthenticated()" << olduser->isAuthenticated();
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: isAcct()" << olduser->isAccounted();
// update password and username, can happen when a new connection is established from the same client with the same port before the timeout in the openvpn server occurs!
olduser->setPassword(newuser->getPassword());
olduser->setUsername(newuser->getUsername());
olduser->setAuthControlFile(newuser->getAuthControlFile());
//delete the newuser and use the olduser
delete newuser;
newuser=olduser;
//TODO: for threading check if the user is already accounted (He must be for renegotiation)
}
else //new user for authentication, no renegotiation
{
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: New user." << endl;
newuser->setPortnumber ( context->addNasPort() );
newuser->setSessionId ( createSessionId ( newuser ) );
//add the user to the context
context->addUser(newuser);
}
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: New user: username: "<< newuser->getUsername() <<", password: *****"
<< ", newuser ip: " << newuser->getCallingStationId()
<< ", newuser port: " << newuser->getUntrustedPort() << " ." << endl;
//there must be a username
if ( newuser->getUsername().size() > 0 ) //&& olduser==NULL)
{
//send the informations to the background process
context->authsocketbackgr.send ( COMMAND_VERIFY );
context->authsocketbackgr.send ( newuser->getUsername() );
context->authsocketbackgr.send ( newuser->getPassword() );
context->authsocketbackgr.send ( newuser->getPortnumber() );
context->authsocketbackgr.send ( newuser->getSessionId() );
context->authsocketbackgr.send ( newuser->getCallingStationId() );
context->authsocketbackgr.send ( newuser->getCommonname() );
context->authsocketbackgr.send ( newuser->getFramedIp() );
//get the response
const int status = context->authsocketbackgr.recvInt();
if ( status == RESPONSE_SUCCEEDED )
{
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Authentication succeeded!" << endl;
//get the routes from background process
newuser->setFramedRoutes ( context->authsocketbackgr.recvStr() );
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Received routes for user: "<< newuser->getFramedRoutes() << "." << endl;
//get the framed ip
newuser->setFramedIp ( context->authsocketbackgr.recvStr() );
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Received framed ip for user: "<< newuser->getFramedIp() << "." << endl;
// get the interval from the background process
newuser->setAcctInterimInterval ( context->authsocketbackgr.recvInt() );
if ( DEBUG ( context->getVerbosity() ) )
cerr << getTime() << "RADIUS-PLUGIN: FOREGROUND THREAD: Receive acctinteriminterval " << newuser->getAcctInterimInterval() <<" sec from backgroundprocess." << endl;
//clear the buffer if it isn't empty
if ( newuser->getVsaBuf() !=NULL )
{