summaryrefslogtreecommitdiffstats
path: root/kioslaves/sieve/sieve.cpp
blob: bc78116622690106a159da7f0f66e74ee3007c40 (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
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
/***************************************************************************
                          sieve.cpp  -  description
                             -------------------
    begin                : Thu Dec 20 18:47:08 EST 2001
    copyright            : (C) 2001 by Hamish Rodda
    email                : meddie@yoyo.cc.monash.edu.au
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License version 2 as     *
 *   published by the Free Software Foundation.                            *
 *                                                                         *
 ***************************************************************************/

/**
 * Portions adapted from the SMTP ioslave.
 * Copyright (c) 2000, 2001 Alex Zepeda <jazepeda@pacbell.net>
 * Copyright (c) 2001 Michael H├Ąckel <Michael@Haeckel.Net>
 * All rights reserved.
 *
 * Policy: the function where the error occurs calls error(). A result of
 * false, where it signifies an error, thus doesn't need to call error() itself.
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

extern "C" {
#include <sasl/sasl.h>
}
#include "sieve.h"

#include <kdebug.h>
#include <kinstance.h>
#include <klocale.h>
#include <kurl.h>
#include <kmdcodec.h>
#include <kglobal.h>
#include <kmessagebox.h>

#include <tqcstring.h>
#include <tqregexp.h>

#include <cstdlib>
using std::exit;
#include <sys/stat.h>
#include <cassert>

#include <kdepimmacros.h>

static const int debugArea = 7122;

static inline
#ifdef NDEBUG
  kndbgstream ksDebug() { return kdDebug( debugArea ); }
  kndbgstream ksDebug( bool cond ) { return kdDebug( cond, debugArea ); }
#else
  kdbgstream ksDebug() { return kdDebug( debugArea ); }
  kdbgstream ksDebug( bool cond ) { return kdDebug( cond, debugArea ); }
#endif

#define SIEVE_DEFAULT_PORT 2000

static sasl_callback_t callbacks[] = {
    { SASL_CB_ECHOPROMPT, NULL, NULL },
    { SASL_CB_NOECHOPROMPT, NULL, NULL },
    { SASL_CB_GETREALM, NULL, NULL },
    { SASL_CB_USER, NULL, NULL },
    { SASL_CB_AUTHNAME, NULL, NULL },
    { SASL_CB_PASS, NULL, NULL },
    { SASL_CB_CANON_USER, NULL, NULL },
    { SASL_CB_LIST_END, NULL, NULL }
};

static const unsigned int SIEVE_DEFAULT_RECIEVE_BUFFER = 512;

using namespace KIO;
extern "C"
{
	KDE_EXPORT int kdemain(int argc, char **argv)
	{
		KInstance instance("kio_sieve" );

		ksDebug() << "*** Starting kio_sieve " << endl;

		if (argc != 4) {
			ksDebug() << "Usage: kio_sieve protocol domain-socket1 domain-socket2" << endl;
			exit(-1);
		}

    if ( sasl_client_init( NULL ) != SASL_OK ) {
      fprintf(stderr, "SASL library initialization failed!\n");
      ::exit (-1);
    }

		kio_sieveProtocol slave(argv[2], argv[3]);
		slave.dispatchLoop();

    sasl_done();

		ksDebug() << "*** kio_sieve Done" << endl;
		return 0;
	}
}

/* ---------------------------------------------------------------------------------- */
kio_sieveResponse::kio_sieveResponse()
{
	clear();
}

/* ---------------------------------------------------------------------------------- */
const uint& kio_sieveResponse::getType() const
{
	return rType;
}

/* ---------------------------------------------------------------------------------- */
const uint kio_sieveResponse::getQuantity() const
{
	return quantity;
}

/* ---------------------------------------------------------------------------------- */
const TQCString& kio_sieveResponse::getAction() const
{
	return key;
}

/* ---------------------------------------------------------------------------------- */
const TQCString& kio_sieveResponse::getKey() const
{
	return key;
}

/* ---------------------------------------------------------------------------------- */
const TQCString& kio_sieveResponse::getVal() const
{
	return val;
}

/* ---------------------------------------------------------------------------------- */
const TQCString& kio_sieveResponse::getExtra() const
{
	return extra;
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveResponse::setQuantity(const uint& newQty)
{
	rType = QUANTITY;
	quantity = newQty;
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveResponse::setAction(const TQCString& newAction)
{
	rType = ACTION;
	key = newAction.copy();
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveResponse::setKey(const TQCString& newKey)
{
	rType = KEY_VAL_PAIR;
	key = newKey.copy();
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveResponse::setVal(const TQCString& newVal)
{
	val = newVal.copy();
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveResponse::setExtra(const TQCString& newExtra)
{
	extra = newExtra.copy();
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveResponse::clear()
{
	rType = NONE;
	extra = key = val = TQCString("");
	quantity = 0;
}

/* ---------------------------------------------------------------------------------- */
kio_sieveProtocol::kio_sieveProtocol(const TQCString &pool_socket, const TQCString &app_socket)
	: TCPSlaveBase( SIEVE_DEFAULT_PORT, "sieve", pool_socket, app_socket, false)
	, m_connMode(NORMAL)
	, m_supportsTLS(false)
	, m_shouldBeConnected(false)
        , m_allowUnencrypted(false)
{
}

/* ---------------------------------------------------------------------------------- */
kio_sieveProtocol::~kio_sieveProtocol()
{
	if ( isConnectionValid() )
		disconnect();
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveProtocol::setHost (const TQString &host, int port, const TQString &user, const TQString &pass)
{
	if ( isConnectionValid() &&
			( m_sServer != host ||
				m_iPort != port ||
				m_sUser != user ||
				m_sPass != pass ) ) {
		disconnect();
	}
	m_sServer = host;
	m_iPort = port ? port : m_iDefaultPort;
	m_sUser = user;
	m_sPass = pass;
	m_supportsTLS = false;
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveProtocol::openConnection()
{
	m_connMode = CONNECTION_ORIENTED;
	connect();
}

bool kio_sieveProtocol::parseCapabilities(bool requestCapabilities/* = false*/)
{
	ksDebug() << k_funcinfo << endl;

	// Setup...
	bool ret = false;

	if (requestCapabilities) {
		sendData("CAPABILITY");
	}

	while (receiveData()) {
		ksDebug() << "Looping receive" << endl;

		if (r.getType() == kio_sieveResponse::ACTION) {
			if ( r.getAction().contains("ok", false) != -1 ) {
				ksDebug() << "Sieve server ready & awaiting authentication." << endl;
				break;
			} else
				ksDebug() << "Unknown action " << r.getAction() << "." << endl;

		} else if (r.getKey() == "IMPLEMENTATION") {
			if (r.getVal().contains("sieve", false) != -1) {
				ksDebug() << "Connected to Sieve server: " << r.getVal() << endl;
				ret = true;
				setMetaData("implementation", r.getVal());
				m_implementation = r.getVal();
			}

		} else if (r.getKey() == "SASL") {
			// Save list of available SASL methods
			m_sasl_caps = TQStringList::split(' ', r.getVal());
			ksDebug() << "Server SASL authentication methods: " << m_sasl_caps.join(", ") << endl;
			setMetaData("saslMethods", r.getVal());

		} else if (r.getKey() == "SIEVE") {
			// Save script capabilities; report back as meta data:
			ksDebug() << "Server script capabilities: " << TQStringList::split(' ', r.getVal()).join(", ") << endl;
			setMetaData("sieveExtensions", r.getVal());

		} else if (r.getKey() == "STARTTLS") {
			// The server supports TLS
			ksDebug() << "Server supports TLS" << endl;
			m_supportsTLS = true;
			setMetaData("tlsSupported", "true");

		} else {
			ksDebug() << "Unrecognised key." << endl;
		}
	}

	if (!m_supportsTLS) {
		setMetaData("tlsSupported", "false");
	}

	return ret;
}


/* ---------------------------------------------------------------------------------- */
/**
 * Checks if connection parameters have changed.
 * If it it, close the current connection
 */
void kio_sieveProtocol::changeCheck( const KURL &url )
{
	TQString auth;

	if (!metaData("sasl").isEmpty())
		auth = metaData("sasl").upper();
	else {
		TQString query = url.query();
		if ( query.startsWith("?") ) query.remove( 0, 1 );
		TQStringList q = TQStringList::split( ",", query );
		TQStringList::iterator it;

		for ( it = q.begin(); it != q.end(); ++it ) {
			if ( ( (*it).section('=',0,0) ).lower() == "x-mech" ) {
				auth = ( (*it).section('=',1) ).upper();
				break;
			}
		}
	}
	ksDebug() << "auth: " << auth << " m_sAuth: " << m_sAuth << endl;
	if ( m_sAuth != auth ) {
		m_sAuth = auth;
		if ( isConnectionValid() )
			disconnect();
	}

        // For TLS, only disconnect if we are unencrypted and are
        // no longer allowed (otherwise, it's still fine):
        const bool allowUnencryptedNow = url.queryItem("x-allow-unencrypted") == "true" ;
        if ( m_allowUnencrypted && !allowUnencryptedNow )
            if ( isConnectionValid() )
                disconnect();
        m_allowUnencrypted = allowUnencryptedNow;
}

/* ---------------------------------------------------------------------------------- */
/**
 * Connects to the server.
 * returns false and calls error() if an error occurred.
 */
bool kio_sieveProtocol::connect(bool useTLSIfAvailable)
{
	ksDebug() << k_funcinfo << endl;

	if (isConnectionValid()) return true;

	infoMessage(i18n("Connecting to %1...").arg( m_sServer));

	if (m_connMode == CONNECTION_ORIENTED && m_shouldBeConnected) {
		error(ERR_CONNECTION_BROKEN, i18n("The connection to the server was lost."));
		return false;
	}

	setBlockConnection(true);

	if (!connectToHost(m_sServer, m_iPort, true)) {
		return false;
	}

	if (!parseCapabilities()) {
		closeDescriptor();
		error(ERR_UNSUPPORTED_PROTOCOL, i18n("Server identification failed."));
		return false;
	}

	// Attempt to start TLS
	if ( !m_allowUnencrypted && !canUseTLS() ) {
            error( ERR_SLAVE_DEFINED, i18n("Can not use TLS. Please enable TLS in the KDE cryptography setting.") );
            disconnect();
            return false;
        }

        if ( !m_allowUnencrypted && useTLSIfAvailable && canUseTLS() && !m_supportsTLS &&
             messageBox( WarningContinueCancel,
                         i18n("TLS encryption was requested, but your Sieve server does not advertise TLS in its capabilities.\n"
                              "You can choose to try to initiate TLS negotiations nonetheless, or cancel the operation."),
                         i18n("Server Does Not Advertise TLS"), i18n("&Start TLS nonetheless"), i18n("&Cancel") ) != KMessageBox::Continue )
        {
            error( ERR_USER_CANCELED, i18n("TLS encryption requested, but not supported by server.") );
            disconnect();
            return false;
        }

	// FIXME find a test server and test that this works
	if (useTLSIfAvailable && canUseTLS()) {
		sendData("STARTTLS");
		if (operationSuccessful()) {
			ksDebug() << "TLS has been accepted. Starting TLS..." << endl
				  << "WARNING this is untested and may fail." << endl;
			int retval = startTLS();
			if (retval == 1) {
				ksDebug() << "TLS enabled successfully." << endl;
				// reparse capabilities:
				parseCapabilities( requestCapabilitiesAfterStartTLS() );
			} else {
				ksDebug() << "TLS initiation failed, code " << retval << endl;
				if ( m_allowUnencrypted ) {
                                    disconnect(true);
                                    return connect(false);
                                }
                                if ( retval != -3 )
                                    messageBox( Information,
                                                i18n("Your Sieve server claims to support TLS, "
                                                     "but negotiation was unsuccessful."),
                                                i18n("Connection Failed") );
                                disconnect(true);
                                return false;
			}
		} else if ( !m_allowUnencrypted ) {
			ksDebug() << "Server incapable of TLS." << endl;
			disconnect();
			error( ERR_SLAVE_DEFINED, i18n("The server does not seem to support TLS. "
                                                       "Disable TLS if you want to connect without encryption.") );
			return false;
		} else
			ksDebug() << "Server incapable of TLS. Transmitted documents will be unencrypted." << endl;
	} else
		ksDebug() << "We are incapable of TLS. Transmitted documents will be unencrypted." << endl;

        assert( m_allowUnencrypted || usingTLS() );

	infoMessage(i18n("Authenticating user..."));
	if (!authenticate()) {
		disconnect();
		error(ERR_COULD_NOT_AUTHENTICATE, i18n("Authentication failed."));
		return false;
	}

	m_shouldBeConnected = true;
	return true;
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveProtocol::closeConnection()
{
	m_connMode = CONNECTION_ORIENTED;
	disconnect();
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveProtocol::disconnect(bool forcibly)
{
	if (!forcibly) {
		sendData("LOGOUT");

		// This crashes under certain conditions as described in
		// http://intevation.de/roundup/kolab/issue2442
		// Fixing KIO::TCPSlaveBase::atEnd() for !fd would also work but 3.x is on life support.
		//if (!operationSuccessful())
		//	ksDebug() << "Server did not logout cleanly." << endl;
	}

	closeDescriptor();
	m_shouldBeConnected = false;
}

/* ---------------------------------------------------------------------------------- */
/*void kio_sieveProtocol::slave_status()
{
	slaveStatus(isConnectionValid() ? m_sServer : "", isConnectionValid());

	finished();
}*/

/* ---------------------------------------------------------------------------------- */
void kio_sieveProtocol::special(const TQByteArray &data)
{
	int tmp;
	TQDataStream stream(data, IO_ReadOnly);
	KURL url;

	stream >> tmp;

	switch (tmp) {
		case 1:
			stream >> url;
			if (!activate(url))
				return;
			break;
		case 2:
			if (!deactivate())
				return;
			break;
		case 3:
			parseCapabilities(true);
			break;
	}

	infoMessage(i18n("Done."));

	finished();
}

/* ---------------------------------------------------------------------------------- */
bool kio_sieveProtocol::activate(const KURL& url)
{
	changeCheck( url );
	if (!connect())
		return false;

	infoMessage(i18n("Activating script..."));

	TQString filename = url.fileName(false);

	if (filename.isEmpty()) {
		error(ERR_DOES_NOT_EXIST, url.prettyURL());
		return false;
	}

	if (!sendData("SETACTIVE \"" + filename.utf8() + "\""))
		return false;

	if (operationSuccessful()) {
		ksDebug() << "Script activation complete." << endl;
		return true;
	} else {
		error(ERR_INTERNAL_SERVER, i18n("There was an error activating the script."));
		return false;
	}
}

/* ---------------------------------------------------------------------------------- */
bool kio_sieveProtocol::deactivate()
{
	if (!connect())
		return false;

	if (!sendData("SETACTIVE \"\""))
		return false;

	if (operationSuccessful()) {
		ksDebug() << "Script deactivation complete." << endl;
		return true;
	} else {
		error(ERR_INTERNAL_SERVER, i18n("There was an error deactivating the script."));
		return false;
	}
}

static void append_lf2crlf( TQByteArray & out, const TQByteArray & in ) {
  if ( in.isEmpty() )
    return;
  const unsigned int oldOutSize = out.size();
  out.resize( oldOutSize + 2 * in.size() );
  const char * s = in.begin();
  const char * const end = in.end();
  char * d = out.begin() + oldOutSize;
  char last = '\0';
  while ( s < end ) {
    if ( *s == '\n' && last != '\r' )
      *d++ = '\r';
    *d++ = last = *s++;
  }
  out.resize( d - out.begin() );
}

void kio_sieveProtocol::put(const KURL& url, int /*permissions*/, bool /*overwrite*/, bool /*resume*/)
{
	changeCheck( url );
	if (!connect())
		return;

	infoMessage(i18n("Sending data..."));

	TQString filename = url.fileName(false);

	if (filename.isEmpty()) {
		error(ERR_MALFORMED_URL, url.prettyURL());
		return;
	}

	TQByteArray data;
	for (;;) {
		dataReq();
		TQByteArray buffer;
		const int newSize = readData(buffer);
		append_lf2crlf( data, buffer );
		if ( newSize < 0 ) {
		  // read error: network in unknown state so disconnect
		  error(ERR_COULD_NOT_READ, i18n("KIO data supply error."));
		  return;
		}
		if ( newSize == 0 )
		  break;
	}

	// script size
	int bufLen = (int)data.size();
	totalSize(bufLen);

	// timsieved 1.1.0:
	// C: HAVESPACE "rejected" 74
	// S: NO "Number expected"
	// C: HAVESPACE 74
	// S: NO "Missing script name"
	// S: HAVESPACE "rejected" "74"
	// C: NO "Number expected"
	// => broken, we can't use it :-(
	// (will be fixed in Cyrus 2.1.10)
#ifndef HAVE_BROKEN_TIMSIEVED
	// first, check quota (it's a SHOULD in draft std)
	if (!sendData("HAVESPACE \"" + filename.utf8() + "\" "
		      + TQCString().setNum( bufLen )))
		return;

	if (!operationSuccessful()) {
		error(ERR_DISK_FULL, i18n("Quota exceeded"));
		return;
	}
#endif

	if (!sendData("PUTSCRIPT \"" + filename.utf8() + "\" {"
		      + TQCString().setNum( bufLen ) + "+}"))
		return;

	// atEnd() lies so the code below doesn't work.
	/*if (!atEnd()) {
		// We are not expecting any data here, so if the server has responded
		// with anything but OK we treat it as an error.
		char * buf = new char[2];
		while (!atEnd()) {
			ksDebug() << "Reading..." << endl;
			read(buf, 1);
			ksDebug() << "Trailing [" << buf[0] << "]" << endl;
		}
		ksDebug() << "End of data." << endl;
		delete[] buf;

		if (!operationSuccessful()) {
			error(ERR_UNSUPPORTED_PROTOCOL, i18n("A protocol error occurred "
						"while trying to negotiate script uploading.\n"
						"The server responded:\n%1")
							.arg(r.getAction().right(r.getAction().length() - 3)));
			return;
		}
	}*/

	// upload data to the server
	if (write(data, bufLen) != bufLen) {
		error(ERR_COULD_NOT_WRITE, i18n("Network error."));
		disconnect(true);
		return;
	}

	// finishing CR/LF
	if (!sendData(""))
		return;

	processedSize(bufLen);

	infoMessage(i18n("Verifying upload completion..."));

	if (operationSuccessful())
		ksDebug() << "Script upload complete." << endl;

	else {
		/* The managesieve server parses received scripts and rejects
		 * scripts which are not syntactically correct. Here we expect
		 * to receive a message detailing the error (only the first
		 * error is reported. */
		if (r.getAction().length() > 3) {
			// make a copy of the extra info
			TQCString extra = r.getAction().right(r.getAction().length() - 3);

			// send the extra message off for re-processing
			receiveData(false, &extra);

			if (r.getType() == kio_sieveResponse::QUANTITY) {
				// length of the error message
				uint len = r.getQuantity();

				TQCString errmsg(len + 1);

				read(errmsg.data(), len);

				error(ERR_INTERNAL_SERVER,
						i18n("The script did not upload successfully.\n"
							"This is probably due to errors in the script.\n"
							"The server responded:\n%1").arg(errmsg));

				// clear the rest of the incoming data
				receiveData();
			} else if (r.getType() == kio_sieveResponse::KEY_VAL_PAIR) {
				error(ERR_INTERNAL_SERVER,
						i18n("The script did not upload successfully.\n"
							"This is probably due to errors in the script.\n"
							"The server responded:\n%1").arg(r.getKey()));
			} else
				error(ERR_INTERNAL_SERVER,
					i18n("The script did not upload successfully.\n"
						"The script may contain errors."));
		} else
			error(ERR_INTERNAL_SERVER,
				i18n("The script did not upload successfully.\n"
					"The script may contain errors."));
	}

	//if ( permissions != -1 )
	//	chmod( url, permissions );

	infoMessage(i18n("Done."));

	finished();
}

static void inplace_crlf2lf( TQByteArray & in ) {
  if ( in.isEmpty() )
    return;
  TQByteArray & out = in; // inplace
  const char * s = in.begin();
  const char * const end = in.end();
  char * d = out.begin();
  char last = '\0';
  while ( s < end ) {
    if ( *s == '\n' && last == '\r' )
      --d;
    *d++ = last = *s++;
  }
  out.resize( d - out.begin() );
}

/* ---------------------------------------------------------------------------------- */
void kio_sieveProtocol::get(const KURL& url)
{
	changeCheck( url );
	if (!connect())
		return;

	infoMessage(i18n("Retrieving data..."));

	TQString filename = url.fileName(false);

	if (filename.isEmpty()) {
		error(ERR_MALFORMED_URL, url.prettyURL());
		return;
	}

	//SlaveBase::mimetype( TQString("text/plain") ); // "application/sieve");

	if (!sendData("GETSCRIPT \"" + filename.utf8() + "\""))
		return;

	if (receiveData() && r.getType() == kio_sieveResponse::QUANTITY) {
		// determine script size
		ssize_t total_len = r.getQuantity();
		totalSize( total_len );

		int recv_len = 0;
		do {
		  // wait for data...
		  if ( !waitForResponse( 600 ) ) {
		    error( KIO::ERR_SERVER_TIMEOUT, m_sServer );
		    disconnect( true );
		    return;
		  }

		  // ...read data...
		  // Only read as much as we need, otherwise we slurp in the OK that
		  // operationSuccessful() is expecting below.
		  TQByteArray dat( kMin( total_len - recv_len, ssize_t(64 * 1024 )) );
		  ssize_t this_recv_len = read( dat.data(), dat.size() );

		  if ( this_recv_len < 1 && !isConnectionValid() ) {
		    error( KIO::ERR_CONNECTION_BROKEN, m_sServer );
		    disconnect( true );
		    return;
		  }

		  dat.resize( this_recv_len );
		  inplace_crlf2lf( dat );
		  // send data to slaveinterface
		  data( dat );

		  recv_len += this_recv_len;
		  processedSize( recv_len );
		} while ( recv_len < total_len );

		infoMessage(i18n("Finishing up...") );
		data(TQByteArray());

		if (operationSuccessful())
			ksDebug() << "Script retrieval complete." << endl;
		else
			ksDebug() << "Script retrieval failed." << endl;
	} else {
		error(ERR_UNSUPPORTED_PROTOCOL, i18n("A protocol error occurred "
							"while trying to negotiate script downloading."));
		return;
	}

	infoMessage(i18n("Done."));
	finished();
}

void kio_sieveProtocol::del(const KURL &url, bool isfile)
{
	if (!isfile) {
		error(ERR_INTERNAL, i18n("Folders are not supported."));
		return;
	}

	changeCheck( url );
	if (!connect())
		return;

	infoMessage(i18n("Deleting file..."));

	TQString filename = url.fileName(false);

	if (filename.isEmpty()) {
		error(ERR_MALFORMED_URL, url.prettyURL());
		return;
	}

	if (!sendData("DELETESCRIPT \"" + filename.utf8() + "\""))
		return;

	if (operationSuccessful())
		ksDebug() << "Script deletion successful." << endl;
	else {
		error(ERR_INTERNAL_SERVER, i18n("The server would not delete the file."));
		return;
	}

	infoMessage(i18n("Done."));

	finished();
}

void kio_sieveProtocol::chmod(const KURL& url, int permissions)
{
  switch ( permissions ) {
  case 0700: // activate
    activate(url);
    break;
  case 0600: // deactivate
    deactivate();
    break;
  default: // unsupported
    error(ERR_CANNOT_CHMOD, i18n("Cannot chmod to anything but 0700 (active) or 0600 (inactive script)."));
    return;
  }

  finished();
}

#if defined(_AIX) && defined(stat)
#undef stat
#endif

void kio_sieveProtocol::stat(const KURL& url)
{
	changeCheck( url );
	if (!connect())
		return;

	UDSEntry entry;

	TQString filename = url.fileName(false);

	if (filename.isEmpty()) {
		UDSAtom atom;
		atom.m_uds = KIO::UDS_NAME;
		atom.m_str = "/";
		entry.append(atom);

		atom.m_uds = KIO::UDS_FILE_TYPE;
		atom.m_long = S_IFDIR;
		entry.append(atom);

		atom.m_uds = KIO::UDS_ACCESS;
		atom.m_long = 0700;
		entry.append(atom);

		statEntry(entry);

	} else {
		if (!sendData("LISTSCRIPTS"))
			return;

		while(receiveData()) {
			if (r.getType() == kio_sieveResponse::ACTION) {
				if (r.getAction().contains("OK", false) == 1)
					// Script list completed
					break;

			} else
				if (filename == TQString::fromUtf8(r.getKey())) {
					entry.clear();

					UDSAtom atom;
					atom.m_uds = KIO::UDS_NAME;
					atom.m_str = TQString::fromUtf8(r.getKey());
					entry.append(atom);

					atom.m_uds = KIO::UDS_FILE_TYPE;
					atom.m_long = S_IFREG;
					entry.append(atom);

					atom.m_uds = KIO::UDS_ACCESS;
					if ( r.getExtra() == "ACTIVE" )
					  atom.m_long = 0700; // mark exec'able
					else
					  atom.m_long = 0600;
					entry.append(atom);

					atom.m_uds = KIO::UDS_MIME_TYPE;
					atom.m_str = "application/sieve";
					entry.append(atom);

					//setMetaData("active", (r.getExtra() == "ACTIVE") ? "yes" : "no");

					statEntry(entry);
					// cannot break here because we need to clear
					// the rest of the incoming data.
				}
		}
	}

	finished();
}

void kio_sieveProtocol::listDir(const KURL& url)
{
	changeCheck( url );
	if (!connect())
		return;

	if (!sendData("LISTSCRIPTS"))
		return;

	UDSEntry entry;

	while(receiveData()) {
		if (r.getType() == kio_sieveResponse::ACTION) {
			if (r.getAction().contains("OK", false) == 1)
				// Script list completed.
				break;

		} else {
			entry.clear();

			UDSAtom atom;
			atom.m_uds = KIO::UDS_NAME;
			atom.m_str = TQString::fromUtf8(r.getKey());
			entry.append(atom);

			atom.m_uds = KIO::UDS_FILE_TYPE;
			atom.m_long = S_IFREG;
			entry.append(atom);

			atom.m_uds = KIO::UDS_ACCESS;
			if ( r.getExtra() == "ACTIVE" )
			  atom.m_long = 0700; // mark exec'able
			else
			  atom.m_long = 0600;
			entry.append(atom);

			atom.m_uds = KIO::UDS_MIME_TYPE;
			atom.m_str = "application/sieve";
			entry.append(atom);

			//asetMetaData("active", (r.getExtra() == "ACTIVE") ? "true" : "false");

			ksDebug() << "Listing script " << r.getKey() << endl;
			listEntry(entry , false);
		}
	}

	listEntry(entry, true);

	finished();
}

/* ---------------------------------------------------------------------------------- */
bool kio_sieveProtocol::saslInteract( void *in, AuthInfo &ai )
{
  ksDebug() << "sasl_interact" << endl;
  sasl_interact_t *interact = ( sasl_interact_t * ) in;

  //some mechanisms do not require username && pass, so it doesn't need a popup
  //window for getting this info
  for ( ; interact->id != SASL_CB_LIST_END; interact++ ) {
    if ( interact->id == SASL_CB_AUTHNAME ||
         interact->id == SASL_CB_PASS ) {

	    if (m_sUser.isEmpty() || m_sPass.isEmpty()) {
		    if (!openPassDlg(ai)) {
			    error(ERR_ABORTED, i18n("No authentication details supplied."));
			    return false;
		    }
        m_sUser = ai.username;
        m_sPass = ai.password;
	    }
      break;
    }
  }

  interact = ( sasl_interact_t * ) in;
  while( interact->id != SASL_CB_LIST_END ) {
    ksDebug() << "SASL_INTERACT id: " << interact->id << endl;
    switch( interact->id ) {
      case SASL_CB_USER:
      case SASL_CB_AUTHNAME:
        ksDebug() << "SASL_CB_[AUTHNAME|USER]: '" << m_sUser << "'" << endl;
        interact->result = strdup( m_sUser.utf8() );
        interact->len = strlen( (const char *) interact->result );
        break;
      case SASL_CB_PASS:
        ksDebug() << "SASL_CB_PASS: [hidden] " << endl;
        interact->result = strdup( m_sPass.utf8() );
        interact->len = strlen( (const char *) interact->result );
        break;
      default:
        interact->result = NULL; interact->len = 0;
        break;
    }
    interact++;
  }
  return true;
}

#define SASLERROR  error(ERR_COULD_NOT_AUTHENTICATE, i18n("An error occurred during authentication: %1").arg( \
      TQString::fromUtf8( sasl_errdetail( conn ) )));

bool kio_sieveProtocol::authenticate()
{
  int result;
  sasl_conn_t *conn = NULL;
  sasl_interact_t *client_interact = NULL;
  const char *out = NULL;
  uint outlen;
  const char *mechusing = NULL;
    TQByteArray challenge, tmp;

	/* Retrieve authentication details from user.
	 * Note: should this require realm as well as user & pass details
	 * before it automatically skips the prompt?
	 * Note2: encoding issues with PLAIN login? */
	AuthInfo ai;
	ai.url.setProtocol("sieve");
	ai.url.setHost(m_sServer);
	ai.url.setPort(m_iPort);
	ai.username = m_sUser;
	ai.password = m_sPass;
	ai.keepPassword = true;
  ai.caption = i18n("Sieve Authentication Details");
  ai.comment = i18n("Please enter your authentication details for your sieve account "
	  "(usually the same as your email password):");

  result = sasl_client_new( "sieve",
                       m_sServer.latin1(),
                       0, 0, callbacks, 0, &conn );

  if ( result != SASL_OK ) {
    ksDebug() << "sasl_client_new failed with: " << result << endl;
    SASLERROR
    return false;
  }

	TQStringList strList;
//	strList.append("NTLM");

  if ( !m_sAuth.isEmpty() )
    strList.append( m_sAuth );
  else
    strList = m_sasl_caps;

  do {
    result = sasl_client_start(conn, strList.join(" ").latin1(), &client_interact,
                       &out, &outlen, &mechusing);

    if (result == SASL_INTERACT)
      if ( !saslInteract( client_interact, ai ) ) {
        sasl_dispose( &conn );
        return false;
      };
  } while ( result == SASL_INTERACT );

  if ( result != SASL_CONTINUE && result != SASL_OK ) {
    ksDebug() << "sasl_client_start failed with: " << result << endl;
    SASLERROR
    sasl_dispose( &conn );
    return false;
  }

	ksDebug() << "Preferred authentication method is " << mechusing << "." << endl;

  TQString firstCommand = "AUTHENTICATE \"" + TQString::fromLatin1( mechusing ) + "\"";
  tmp.setRawData( out, outlen );
  KCodecs::base64Encode( tmp, challenge );
  tmp.resetRawData( out, outlen );
  if ( !challenge.isEmpty() ) {
    firstCommand += " \"";
    firstCommand += TQString::fromLatin1( challenge.data(), challenge.size() );
    firstCommand += "\"";
  }

	if (!sendData( firstCommand.latin1() ))
		return false;

	TQCString command;

	do {
		receiveData();

		if (operationResult() != OTHER)
			break;

		ksDebug() << "Challenge len  " << r.getQuantity() << endl;

		if (r.getType() != kio_sieveResponse::QUANTITY) {
      sasl_dispose( &conn );
			error(ERR_SLAVE_DEFINED,
					i18n("A protocol error occurred during authentication.\n"
							"Choose a different authentication method to %1.").arg(mechusing));
			return false;
		}

		uint qty = r.getQuantity();

		receiveData();

		if (r.getType() != kio_sieveResponse::ACTION && r.getAction().length() != qty) {
      sasl_dispose( &conn );
			error(ERR_UNSUPPORTED_PROTOCOL,
					i18n("A protocol error occurred during authentication.\n"
							"Choose a different authentication method to %1.").arg(mechusing));
			return false;
		}

    tmp.setRawData( r.getAction().data(), qty );
    KCodecs::base64Decode( tmp, challenge );
    tmp.resetRawData( r.getAction().data(), qty );
//		ksDebug() << "S:  [" << r.getAction() << "]." << endl;
//		ksDebug() << "S-1:  [" << TQCString(challenge.data(), challenge.size()+1) << "]." << endl;

    do {
      result = sasl_client_step(conn, challenge.isEmpty() ? 0 : challenge.data(),
                                  challenge.size(),
                                  &client_interact,
                                  &out, &outlen);

      if (result == SASL_INTERACT)
        if ( !saslInteract( client_interact, ai ) ) {
          sasl_dispose( &conn );
          return false;
        };
    } while ( result == SASL_INTERACT );

    ksDebug() << "sasl_client_step: " << result << endl;
    if ( result != SASL_CONTINUE && result != SASL_OK ) {
      ksDebug() << "sasl_client_step failed with: " << result << endl;
      SASLERROR
      sasl_dispose( &conn );
      return false;
    }

    tmp.setRawData( out, outlen );
    KCodecs::base64Encode( tmp, challenge );
    tmp.resetRawData( out, outlen );
    sendData("\"" + TQCString( challenge.data(), challenge.size()+1 ) + "\"");
//    ksDebug() << "C:  [" << TQCString(challenge.data(), challenge.size()+1) << "]." << endl;
//    ksDebug() << "C-1:  [" << out << "]." << endl;
  } while ( true );

	ksDebug() << "Challenges finished." << endl;
  sasl_dispose( &conn );

	if (operationResult() == OK) {
		// Authentication succeeded.
		return true;
	} else {
		// Authentication failed.
		error(ERR_COULD_NOT_AUTHENTICATE, i18n("Authentication failed.\nMost likely the password is wrong.\nThe server responded:\n%1").arg( r.getAction() ) );
		return false;
	}
}

/* --------------------------------------------------------------------------- */
void kio_sieveProtocol::mimetype(const KURL & url)
{
	ksDebug() << "Requesting mimetype for " << url.prettyURL() << endl;

	if (url.fileName(false).isEmpty())
		mimeType( "inode/directory" );
	else
		mimeType( "application/sieve" );

	finished();
}


/* --------------------------------------------------------------------------- */
bool kio_sieveProtocol::sendData(const TQCString &data)
{
	TQCString write_buf = data + "\r\n";

	//ksDebug() << "C: " << data << endl;

	// Write the command
	ssize_t write_buf_len = write_buf.length();
	if (write(write_buf.data(), write_buf_len) != write_buf_len) {
		error(ERR_COULD_NOT_WRITE, i18n("Network error."));
		disconnect(true);
		return false;
	}

	return true;
}

/* --------------------------------------------------------------------------- */
bool kio_sieveProtocol::receiveData(bool waitForData, TQCString *reparse)
{
	TQCString interpret;
	int start, end;

	if (!reparse) {
		if (!waitForData)
			// is there data waiting?
			if (atEnd()) return false;

		// read data from the server
		char buffer[SIEVE_DEFAULT_RECIEVE_BUFFER];
		readLine(buffer, SIEVE_DEFAULT_RECIEVE_BUFFER - 1);
		buffer[SIEVE_DEFAULT_RECIEVE_BUFFER-1] = '\0';

		// strip LF/CR
		interpret = TQCString(buffer).left(qstrlen(buffer) - 2);

	} else {
		interpret = reparse->copy();
	}

	r.clear();

	//ksDebug() << "S: " << interpret << endl;

	switch(interpret[0]) {
		case '{':
		  {
			// expecting {quantity}
			start = 0;
			end = interpret.find("+}", start + 1);
			// some older versions of Cyrus enclose the literal size just in { } instead of { +}
			if ( end == -1 )
				end = interpret.find('}', start + 1);

			bool ok = false;
			r.setQuantity(interpret.mid(start + 1, end - start - 1).toUInt( &ok ));
			if (!ok) {
				disconnect();
				error(ERR_INTERNAL_SERVER, i18n("A protocol error occurred."));
				return false;
			}

			return true;
		  }
		case '"':
			// expecting "key" "value" pairs
			break;
		default:
			// expecting single string
			r.setAction(interpret);
			return true;
	}

	start = 0;

	end = interpret.find(34, start + 1);
	if (end == -1) {
		ksDebug() << "Possible insufficient buffer size." << endl;
		r.setKey(interpret.right(interpret.length() - start));
		return true;
	}

	r.setKey(interpret.mid(start + 1, end - start - 1));

	start = interpret.find(34, end + 1);
	if (start == -1) {
		if ((int)interpret.length() > end)
			// skip " and space
			r.setExtra(interpret.right(interpret.length() - end - 2));

		return true;
	}

	end = interpret.find(34, start + 1);
	if (end == -1) {
		ksDebug() << "Possible insufficient buffer size." << endl;
		r.setVal(interpret.right(interpret.length() - start));
		return true;
	}

	r.setVal(interpret.mid(start + 1, end - start - 1));
	return true;
}

bool kio_sieveProtocol::operationSuccessful()
{
	while (receiveData(false)) {
		if (r.getType() == kio_sieveResponse::ACTION) {
			TQCString response = r.getAction().left(2);
			if (response == "OK") {
				return true;
			} else if (response == "NO") {
				return false;
			}
		}
	}
	return false;
}

int kio_sieveProtocol::operationResult()
{
	if (r.getType() == kio_sieveResponse::ACTION) {
		TQCString response = r.getAction().left(2);
		if (response == "OK") {
			return OK;
		} else if (response == "NO") {
			return NO;
		} else if (response == "BY"/*E*/) {
			return BYE;
		}
	}

	return OTHER;
}

bool kio_sieveProtocol::requestCapabilitiesAfterStartTLS() const
{
  // Cyrus didn't send CAPABILITIES after STARTTLS until 2.3.11, which is
  // not standard conform, but we need to support that anyway.
  // m_implementation looks like this 'Cyrus timsieved v2.2.12' for Cyrus btw.
  TQRegExp regExp( "Cyrus\\stimsieved\\sv(\\d+)\\.(\\d+)\\.(\\d+)([-\\w]*)", false );
  if ( regExp.search( m_implementation ) >= 0 ) {
    const int major = regExp.cap( 1 ).toInt();
    const int minor = regExp.cap( 2 ).toInt();
    const int patch = regExp.cap( 3 ).toInt();
    const TQString vendor = regExp.cap( 4 );
    if ( major < 2 || (major == 2 && (minor < 3 || (minor == 3 && patch < 11))) || (vendor == "-kolab-nocaps") ) {
      ksDebug() << k_funcinfo << "Enabling compat mode for Cyrus < 2.3.11 or Cyrus marked as \"kolab-nocaps\"" << endl;
      return true;
    }
  }
  return false;
}