summaryrefslogtreecommitdiffstats
path: root/libkdenetwork/libgpgme-copy/gpgme/engine-gpgsm.c
blob: 7ad8dc6f28974684b491743b46cf87370ffb2a1f (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
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
/* engine-gpgsm.c - GpgSM engine.
   Copyright (C) 2000 Werner Koch (dd9jn)
   Copyright (C) 2001, 2002, 2003, 2004, 2005 g10 Code GmbH
 
   This file is part of GPGME.

   GPGME is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of
   the License, or (at your option) any later version.
   
   GPGME 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
   Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser 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.  */

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

#ifndef HAVE_W32_SYSTEM

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <assert.h>
#include <unistd.h>
#include <locale.h>
#include <fcntl.h> /* FIXME */
#include <errno.h>

#include "gpgme.h"
#include "util.h"
#include "ops.h"
#include "wait.h"
#include "priv-io.h"
#include "sema.h"

#include "assuan.h"
#include "status-table.h"
#include "debug.h"

#include "engine-backend.h"


typedef struct
{
  int fd;	/* FD we talk about.  */
  int server_fd; /* Server FD for this connection.  */
  int dir;	/* Inbound/Outbound, maybe given implicit?  */
  void *data;	/* Handler-specific data.  */
  void *tag;	/* ID from the user for gpgme_remove_io_callback.  */
} iocb_data_t;


struct engine_gpgsm
{
  assuan_context_t assuan_ctx;

  int lc_ctype_set;
  int lc_messages_set;

  iocb_data_t status_cb;

  /* Input, output etc are from the servers perspective.  */
  iocb_data_t input_cb;

  iocb_data_t output_cb;

  iocb_data_t message_cb;

  struct
  {
    engine_status_handler_t fnc;
    void *fnc_value;
  } status;

  struct
  {
    engine_colon_line_handler_t fnc;
    void *fnc_value;
    struct
    {
      char *line;
      int linesize;
      int linelen;
    } attic;
    int any; /* any data line seen */
  } colon; 

  struct gpgme_io_cbs io_cbs;
};

typedef struct engine_gpgsm *engine_gpgsm_t;


static char *
gpgsm_get_version (const char *file_name)
{
  return _gpgme_get_program_version (file_name ? file_name
				     : _gpgme_get_gpgsm_path ());
}


static const char *
gpgsm_get_req_version (void)
{
  return NEED_GPGSM_VERSION;
}


static void
close_notify_handler (int fd, void *opaque)
{
  engine_gpgsm_t gpgsm = opaque;

  assert (fd != -1);
  if (gpgsm->status_cb.fd == fd)
    {
      if (gpgsm->status_cb.tag)
	(*gpgsm->io_cbs.remove) (gpgsm->status_cb.tag);
      gpgsm->status_cb.fd = -1;
      gpgsm->status_cb.tag = NULL;
    }
  else if (gpgsm->input_cb.fd == fd)
    {
      if (gpgsm->input_cb.tag)
	(*gpgsm->io_cbs.remove) (gpgsm->input_cb.tag);
      gpgsm->input_cb.fd = -1;
      gpgsm->input_cb.tag = NULL;
    }
  else if (gpgsm->output_cb.fd == fd)
    {
      if (gpgsm->output_cb.tag)
	(*gpgsm->io_cbs.remove) (gpgsm->output_cb.tag);
      gpgsm->output_cb.fd = -1;
      gpgsm->output_cb.tag = NULL;
    }
  else if (gpgsm->message_cb.fd == fd)
    {
      if (gpgsm->message_cb.tag)
	(*gpgsm->io_cbs.remove) (gpgsm->message_cb.tag);
      gpgsm->message_cb.fd = -1;
      gpgsm->message_cb.tag = NULL;
    }
}


static gpgme_error_t
map_assuan_error (gpg_error_t err)
{
  if (!err)
    return 0;

  if (err == -1)
    return gpg_error (GPG_ERR_INV_ENGINE);

  /* New code will use gpg_error_t values.  */
  if (gpg_err_source (err))
    return (gpgme_error_t) err;

  /* Legacy code will use old values.  */
  switch (err)
    {
    case ASSUAN_No_Error:
      return gpg_error (GPG_ERR_NO_ERROR);
    case ASSUAN_General_Error:
      return gpg_error (GPG_ERR_GENERAL);
    case ASSUAN_Out_Of_Core:
      return gpg_error (GPG_ERR_ENOMEM);
    case ASSUAN_Invalid_Value:
      return gpg_error (GPG_ERR_INV_VALUE);
    case ASSUAN_Timeout:
      return gpg_error (GPG_ERR_ETIMEDOUT);
    case ASSUAN_Read_Error:
      return gpg_error (GPG_ERR_GENERAL);
    case ASSUAN_Write_Error:
      return gpg_error (GPG_ERR_GENERAL);

    case ASSUAN_Problem_Starting_Server:
    case ASSUAN_Not_A_Server:
    case ASSUAN_Not_A_Client:
    case ASSUAN_Nested_Commands:
    case ASSUAN_No_Data_Callback:
    case ASSUAN_No_Inquire_Callback:
    case ASSUAN_Connect_Failed:
    case ASSUAN_Accept_Failed:
    case ASSUAN_Invalid_Command:
    case ASSUAN_Unknown_Command:
    case ASSUAN_Syntax_Error:
    case ASSUAN_Parameter_Error:
    case ASSUAN_Parameter_Conflict:
    case ASSUAN_No_Input:
    case ASSUAN_No_Output:
    case ASSUAN_No_Data_Available:
    case ASSUAN_Too_Much_Data:
    case ASSUAN_Inquire_Unknown:
    case ASSUAN_Inquire_Error:
    case ASSUAN_Invalid_Option:
    case ASSUAN_Unexpected_tqStatus:
    case ASSUAN_Unexpected_Data:
    case ASSUAN_Invalid_tqStatus:
      return gpg_error (GPG_ERR_ASSUAN);

    case ASSUAN_Invalid_Response:
      return gpg_error (GPG_ERR_INV_RESPONSE);

    case ASSUAN_Not_Implemented:
      return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
    case ASSUAN_Line_Too_Long:
      return gpg_error (GPG_ERR_LINE_TOO_LONG);
    case ASSUAN_Line_Not_Terminated:
      return gpg_error (GPG_ERR_INCOMPLETE_LINE);
    case ASSUAN_Canceled:
      return gpg_error (GPG_ERR_CANCELED);

    case ASSUAN_Unsupported_Algorithm:
      return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
    case ASSUAN_Server_Resource_Problem:
      return gpg_error (GPG_ERR_RESOURCE_LIMIT);
    case ASSUAN_Server_IO_Error:
      return gpg_error (GPG_ERR_GENERAL);
    case ASSUAN_Server_Bug:
      return gpg_error (GPG_ERR_BUG);
    case ASSUAN_Invalid_Data:
      return gpg_error (GPG_ERR_INV_DATA);
    case ASSUAN_Invalid_Index:
      return gpg_error (GPG_ERR_INV_INDEX);
    case ASSUAN_Not_Confirmed:
      return gpg_error (GPG_ERR_NOT_CONFIRMED);
    case ASSUAN_Bad_Certificate:
      return gpg_error (GPG_ERR_BAD_CERT);
    case ASSUAN_Bad_Certificate_Chain:
      return gpg_error (GPG_ERR_BAD_CERT_CHAIN);
    case ASSUAN_Missing_Certificate:
      return gpg_error (GPG_ERR_MISSING_CERT);
    case ASSUAN_Bad_Signature:
      return gpg_error (GPG_ERR_BAD_SIGNATURE);
    case ASSUAN_No_Agent:
      return gpg_error (GPG_ERR_NO_AGENT);
    case ASSUAN_Agent_Error:
      return gpg_error (GPG_ERR_AGENT);
    case ASSUAN_No_Public_Key:
      return gpg_error (GPG_ERR_NO_PUBKEY);
    case ASSUAN_No_Secret_Key:
      return gpg_error (GPG_ERR_NO_SECKEY);
    case ASSUAN_Invalid_Name:
      return gpg_error (GPG_ERR_INV_NAME);
      
    case ASSUAN_Cert_Revoked:
      return gpg_error (GPG_ERR_CERT_REVOKED);
    case ASSUAN_No_CRL_For_Cert:
      return gpg_error (GPG_ERR_NO_CRL_KNOWN);
    case ASSUAN_CRL_Too_Old:
      return gpg_error (GPG_ERR_CRL_TOO_OLD);
    case ASSUAN_Not_Trusted:
      return gpg_error (GPG_ERR_NOT_TRUSTED);

    case ASSUAN_Card_Error:
      return gpg_error (GPG_ERR_CARD);
    case ASSUAN_Invalid_Card:
      return gpg_error (GPG_ERR_INV_CARD);
    case ASSUAN_No_PKCS15_App:
      return gpg_error (GPG_ERR_NO_PKCS15_APP);
    case ASSUAN_Card_Not_Present:
      return gpg_error (GPG_ERR_CARD_NOT_PRESENT);
    case ASSUAN_Invalid_Id:
      return gpg_error (GPG_ERR_INV_ID);
    default:
      return gpg_error (GPG_ERR_GENERAL);
    }
}


static gpgme_error_t
gpgsm_cancel (void *engine)
{
  engine_gpgsm_t gpgsm = engine;

  if (!gpgsm)
    return gpg_error (GPG_ERR_INV_VALUE);

  if (gpgsm->status_cb.fd != -1)
    _gpgme_io_close (gpgsm->status_cb.fd);
  if (gpgsm->input_cb.fd != -1)
    _gpgme_io_close (gpgsm->input_cb.fd);
  if (gpgsm->output_cb.fd != -1)
    _gpgme_io_close (gpgsm->output_cb.fd);
  if (gpgsm->message_cb.fd != -1)
    _gpgme_io_close (gpgsm->message_cb.fd);

  if (gpgsm->assuan_ctx)
    {
      assuan_disconnect (gpgsm->assuan_ctx);
      gpgsm->assuan_ctx = NULL;
    }

  return 0;
}


static void
gpgsm_release (void *engine)
{
  engine_gpgsm_t gpgsm = engine;

  if (!gpgsm)
    return;

  gpgsm_cancel (engine);

  free (gpgsm->colon.attic.line);
  free (gpgsm);
}


static gpgme_error_t
gpgsm_new (void **engine, const char *file_name, const char *home_dir)
{
  gpgme_error_t err = 0;
  engine_gpgsm_t gpgsm;
  const char *argv[5];
  int argc;
#if !USE_DESCRIPTOR_PASSING
  int fds[2];
  int child_fds[4];
#endif
  char *dft_display = NULL;
  char dft_ttyname[64];
  char *dft_ttytype = NULL;
  char *optstr;

  gpgsm = calloc (1, sizeof *gpgsm);
  if (!gpgsm)
    return gpg_error_from_errno (errno);

  gpgsm->status_cb.fd = -1;
  gpgsm->status_cb.dir = 1;
  gpgsm->status_cb.tag = 0;
  gpgsm->status_cb.data = gpgsm;

  gpgsm->input_cb.fd = -1;
  gpgsm->input_cb.dir = 0;
  gpgsm->input_cb.tag = 0;
  gpgsm->input_cb.server_fd = -1;
  gpgsm->output_cb.fd = -1;
  gpgsm->output_cb.dir = 1;
  gpgsm->output_cb.tag = 0;
  gpgsm->output_cb.server_fd = -1;
  gpgsm->message_cb.fd = -1;
  gpgsm->message_cb.dir = 0;
  gpgsm->message_cb.tag = 0;
  gpgsm->message_cb.server_fd = -1;

  gpgsm->status.fnc = 0;
  gpgsm->colon.fnc = 0;
  gpgsm->colon.attic.line = 0;
  gpgsm->colon.attic.linesize = 0;
  gpgsm->colon.attic.linelen = 0;
  gpgsm->colon.any = 0;

  gpgsm->io_cbs.add = NULL;
  gpgsm->io_cbs.add_priv = NULL;
  gpgsm->io_cbs.remove = NULL;
  gpgsm->io_cbs.event = NULL;
  gpgsm->io_cbs.event_priv = NULL;

#if !USE_DESCRIPTOR_PASSING
  if (_gpgme_io_pipe (fds, 0) < 0)
    {
      err = gpg_error_from_errno (errno);
      goto leave;
    }
  gpgsm->input_cb.fd = fds[1];
  gpgsm->input_cb.server_fd = fds[0];

  if (_gpgme_io_pipe (fds, 1) < 0)
    {
      err = gpg_error_from_errno (errno);
      goto leave;
    }
  gpgsm->output_cb.fd = fds[0];
  gpgsm->output_cb.server_fd = fds[1];

  if (_gpgme_io_pipe (fds, 0) < 0)
    {
      err = gpg_error_from_errno (errno);
      goto leave;
    }
  gpgsm->message_cb.fd = fds[1];
  gpgsm->message_cb.server_fd = fds[0];

  child_fds[0] = gpgsm->input_cb.server_fd;
  child_fds[1] = gpgsm->output_cb.server_fd;
  child_fds[2] = gpgsm->message_cb.server_fd;
  child_fds[3] = -1;
#endif

  argc = 0;
  argv[argc++] = "gpgsm";
  if (home_dir)
    {
      argv[argc++] = "--homedir";
      argv[argc++] = home_dir;
    }
  argv[argc++] = "--server";
  argv[argc++] = NULL;

#if USE_DESCRIPTOR_PASSING
  err = assuan_pipe_connect_ext
    (&gpgsm->assuan_ctx, file_name ? file_name : _gpgme_get_gpgsm_path (),
     argv, NULL, NULL, NULL, 1);
#else
  err = assuan_pipe_connect
    (&gpgsm->assuan_ctx, file_name ? file_name : _gpgme_get_gpgsm_path (),
     argv, child_fds);
#endif
  if (err)
    goto leave;

  err = _gpgme_getenv ("DISPLAY", &dft_display);
  if (err)
    goto leave;
  if (dft_display)
    {
      if (asprintf (&optstr, "OPTION display=%s", dft_display) < 0)
        {
	  free (dft_display);
	  err = gpg_error_from_errno (errno);
	  goto leave;
	}
      free (dft_display);

      err = assuan_transact (gpgsm->assuan_ctx, optstr, NULL, NULL, NULL,
			     NULL, NULL, NULL);
      free (optstr);
      if (err)
	{
	  err = map_assuan_error (err);
	  goto leave;
	}
    }

  if (isatty (1))
    {
      if (ttyname_r (1, dft_ttyname, sizeof (dft_ttyname)))
	{
	  err = gpg_error_from_errno (errno);
	  goto leave;
	}
      else
	{
	  if (asprintf (&optstr, "OPTION ttyname=%s", dft_ttyname) < 0)
	    {
	      err = gpg_error_from_errno (errno);
	      goto leave;
	    }
	  err = assuan_transact (gpgsm->assuan_ctx, optstr, NULL, NULL, NULL,
				 NULL, NULL, NULL);
	  free (optstr);
	  if (err)
	    {
	      err = map_assuan_error (err);
	      goto leave;
	    }

	  err = _gpgme_getenv ("TERM", &dft_ttytype);
	  if (err)
	    goto leave;
	  if (dft_ttytype)
	    {
	      if (asprintf (&optstr, "OPTION ttytype=%s", dft_ttytype) < 0)
		{
		  free (dft_ttytype);
		  err = gpg_error_from_errno (errno);
		  goto leave;
		}
	      free (dft_ttytype);

	      err = assuan_transact (gpgsm->assuan_ctx, optstr, NULL, NULL,
				     NULL, NULL, NULL, NULL);
	      free (optstr);
	      if (err)
		{
		  err = map_assuan_error (err);
		  goto leave;
		}
	    }
	}
    }

#if !USE_DESCRIPTOR_PASSING
  if (!err
      && (_gpgme_io_set_close_notify (gpgsm->input_cb.fd,
				      close_notify_handler, gpgsm)
	  || _gpgme_io_set_close_notify (gpgsm->output_cb.fd,
					 close_notify_handler, gpgsm)
	  || _gpgme_io_set_close_notify (gpgsm->message_cb.fd,
					 close_notify_handler, gpgsm)))
    {
      err = gpg_error (GPG_ERR_GENERAL);
      goto leave;
    }
#endif

 leave:
  /* Close the server ends of the pipes.  Our ends are closed in
     gpgsm_release().  */
#if !USE_DESCRIPTOR_PASSING
  if (gpgsm->input_cb.server_fd != -1)
    _gpgme_io_close (gpgsm->input_cb.server_fd);
  if (gpgsm->output_cb.server_fd != -1)
    _gpgme_io_close (gpgsm->output_cb.server_fd);
  if (gpgsm->message_cb.server_fd != -1)
    _gpgme_io_close (gpgsm->message_cb.server_fd);
#endif

  if (err)
    gpgsm_release (gpgsm);
  else
    *engine = gpgsm;

  return err;
}


static gpgme_error_t
gpgsm_set_locale (void *engine, int category, const char *value)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;
  char *optstr;
  char *catstr;

  /* FIXME: If value is NULL, we need to reset the option to default.
     But we can't do this.  So we error out here.  GPGSM needs support
     for this.  */
  if (category == LC_CTYPE)
    {
      catstr = "lc-ctype";
      if (!value && gpgsm->lc_ctype_set)
	return gpg_error (GPG_ERR_INV_VALUE);
      if (value)
	gpgsm->lc_ctype_set = 1;
    }
#ifdef LC_MESSAGES
  else if (category == LC_MESSAGES)
    {
      catstr = "lc-messages";
      if (!value && gpgsm->lc_messages_set)
	return gpg_error (GPG_ERR_INV_VALUE);
      if (value)
	gpgsm->lc_messages_set = 1;
    }
#endif /* LC_MESSAGES */
  else
    return gpg_error (GPG_ERR_INV_VALUE);

  if (asprintf (&optstr, "OPTION %s=%s", catstr, value) < 0)
    err = gpg_error_from_errno (errno);
  else
    {
      err = assuan_transact (gpgsm->assuan_ctx, optstr, NULL, NULL,
			     NULL, NULL, NULL, NULL);
      free (optstr);
      if (err)
	err = map_assuan_error (err);
    }
  return err;
}


/* Forward declaration.  */
static gpgme_status_code_t parse_status (const char *name);

static gpgme_error_t
gpgsm_assuan_simple_command (assuan_context_t ctx, char *cmd,
			     engine_status_handler_t status_fnc,
			     void *status_fnc_value)
{
  gpg_error_t err;
  char *line;
  size_t linelen;

  err = assuan_write_line (ctx, cmd);
  if (err)
    return map_assuan_error (err);

  do
    {
      err = assuan_read_line (ctx, &line, &linelen);
      if (err)
	return map_assuan_error (err);

      if (*line == '#' || !linelen)
	continue;

      if (linelen >= 2
	  && line[0] == 'O' && line[1] == 'K'
	  && (line[2] == '\0' || line[2] == ' '))
	return 0;
      else if (linelen >= 4
	  && line[0] == 'E' && line[1] == 'R' && line[2] == 'R'
	  && line[3] == ' ')
	err = map_assuan_error (atoi (&line[4]));
      else if (linelen >= 2
	       && line[0] == 'S' && line[1] == ' ')
	{
	  char *rest;
	  gpgme_status_code_t r;

	  rest = strchr (line + 2, ' ');
	  if (!rest)
	    rest = line + linelen; /* set to an empty string */
	  else
	    *(rest++) = 0;

	  r = parse_status (line + 2);

	  if (r >= 0 && status_fnc)
	    err = status_fnc (status_fnc_value, r, rest);
	  else
	    err = gpg_error (GPG_ERR_GENERAL);
	}
      else
	err = gpg_error (GPG_ERR_GENERAL);
    }
  while (!err);

  return err;
}


typedef enum { INPUT_FD, OUTPUT_FD, MESSAGE_FD } fd_type_t;

static void
gpgsm_clear_fd (engine_gpgsm_t gpgsm, fd_type_t fd_type)
{
#if !USE_DESCRIPTOR_PASSING
  switch (fd_type)
    {
    case INPUT_FD:
      _gpgme_io_close (gpgsm->input_cb.fd);
      break;
    case OUTPUT_FD:
      _gpgme_io_close (gpgsm->output_cb.fd);
      break;
    case MESSAGE_FD:
      _gpgme_io_close (gpgsm->message_cb.fd);
      break;
    }
#endif
}

#define COMMANDLINELEN 40
static gpgme_error_t
gpgsm_set_fd (engine_gpgsm_t gpgsm, fd_type_t fd_type, const char *opt)
{
  gpg_error_t err = 0;
  char line[COMMANDLINELEN];
  char *which;
  iocb_data_t *iocb_data;
  int dir;
  int fd;

  switch (fd_type)
    {
    case INPUT_FD:
      which = "INPUT";
      iocb_data = &gpgsm->input_cb;
      break;

    case OUTPUT_FD:
      which = "OUTPUT";
      iocb_data = &gpgsm->output_cb;
      break;

    case MESSAGE_FD:
      which = "MESSAGE";
      iocb_data = &gpgsm->message_cb;
      break;

    default:
      return gpg_error (GPG_ERR_INV_VALUE);
    }

  dir = iocb_data->dir;

#if USE_DESCRIPTOR_PASSING
  /* We try to short-cut the communication by giving GPGSM direct
     access to the file descriptor, rather than using a pipe.  */
  iocb_data->server_fd = _gpgme_data_get_fd (iocb_data->data);
  if (iocb_data->server_fd < 0)
    {
      int fds[2];

      if (_gpgme_io_pipe (fds, 0) < 0)
	return gpg_error_from_errno (errno);

      iocb_data->fd = dir ? fds[0] : fds[1];
      iocb_data->server_fd = dir ? fds[1] : fds[0];

      if (_gpgme_io_set_close_notify (iocb_data->fd,
				      close_notify_handler, gpgsm))
	{
	  err = gpg_error (GPG_ERR_GENERAL);
	  goto leave_set_fd;
	}
    }
#endif

  fd = iocb_data->server_fd;

#if USE_DESCRIPTOR_PASSING
  err = assuan_sendfd (gpgsm->assuan_ctx, fd);
  if (err)
    goto leave_set_fd;

  _gpgme_io_close (fd);

  if (opt)
    snprintf (line, COMMANDLINELEN, "%s FD %s", which, opt);
  else
    snprintf (line, COMMANDLINELEN, "%s FD", which);
#else
  if (opt)
    snprintf (line, COMMANDLINELEN, "%s FD=%i %s", which, fd, opt);
  else
    snprintf (line, COMMANDLINELEN, "%s FD=%i", which, fd);
#endif

  err = gpgsm_assuan_simple_command (gpgsm->assuan_ctx, line, NULL, NULL);

#if USE_DESCRIPTOR_PASSING
 leave_set_fd:
  if (err)
    {
      _gpgme_io_close (iocb_data->fd);
      _gpgme_io_close (iocb_data->server_fd);
      iocb_data->fd = -1;
      iocb_data->server_fd = -1;
    }
#endif

  return err;
}


static const char *
map_input_enc (gpgme_data_t d)
{
  switch (gpgme_data_get_encoding (d))
    {
    case GPGME_DATA_ENCODING_NONE:
      break;
    case GPGME_DATA_ENCODING_BINARY:
      return "--binary";
    case GPGME_DATA_ENCODING_BASE64:
      return "--base64";
    case GPGME_DATA_ENCODING_ARMOR:
      return "--armor";
    default:
      break;
    }
  return NULL;
}


static int
status_cmp (const void *ap, const void *bp)
{
  const struct status_table_s *a = ap;
  const struct status_table_s *b = bp;

  return strcmp (a->name, b->name);
}


static gpgme_status_code_t
parse_status (const char *name)
{
  struct status_table_s t, *r;
  t.name = name;
  r = bsearch (&t, status_table, DIM(status_table) - 1,
	       sizeof t, status_cmp);
  return r ? r->code : -1;
}


static gpgme_error_t
status_handler (void *opaque, int fd)
{
  gpg_error_t assuan_err;
  gpgme_error_t err = 0;
  engine_gpgsm_t gpgsm = opaque;
  char *line;
  size_t linelen;

  do
    {
      assuan_err = assuan_read_line (gpgsm->assuan_ctx, &line, &linelen);
      if (assuan_err)
	{
	  /* Try our best to terminate the connection friendly.  */
	  /*	  assuan_write_line (gpgsm->assuan_ctx, "BYE"); */
	  err = map_assuan_error (assuan_err);
          DEBUG3 ("fd %d: error from assuan (%d) getting status line : %s \n",
                  fd, assuan_err, gpg_strerror (err));
	}
      else if (linelen >= 3
	       && line[0] == 'E' && line[1] == 'R' && line[2] == 'R'
	       && (line[3] == '\0' || line[3] == ' '))
	{
	  if (line[3] == ' ')
	    err = map_assuan_error (atoi (&line[4]));
	  else
	    err = gpg_error (GPG_ERR_GENERAL);
          DEBUG2 ("fd %d: ERR line - mapped to: %s\n",
                  fd, err? gpg_strerror (err):"ok");
	}
      else if (linelen >= 2
	       && line[0] == 'O' && line[1] == 'K'
	       && (line[2] == '\0' || line[2] == ' '))
	{
	  if (gpgsm->status.fnc)
	    err = gpgsm->status.fnc (gpgsm->status.fnc_value,
				     GPGME_STATUS_EOF, "");
	  
	  if (!err && gpgsm->colon.fnc && gpgsm->colon.any )
            {
              /* We must tell a colon function about the EOF. We do
                 this only when we have seen any data lines.  Note
                 that this inlined use of colon data lines will
                 eventually be changed into using a regular data
                 channel. */
              gpgsm->colon.any = 0;
              err = gpgsm->colon.fnc (gpgsm->colon.fnc_value, NULL);
            }
	  _gpgme_io_close (gpgsm->status_cb.fd);
          DEBUG2 ("fd %d: OK line - final status: %s\n",
                  fd, err? gpg_strerror (err):"ok");
	  return err;
	}
      else if (linelen > 2
	       && line[0] == 'D' && line[1] == ' '
	       && gpgsm->colon.fnc)
        {
	  /* We are using the colon handler even for plain inline data
             - strange name for that function but for historic reasons
             we keep it.  */
          /* FIXME We can't use this for binary data because we
             assume this is a string.  For the current usage of colon
             output it is correct.  */
          char *src = line + 2;
	  char *end = line + linelen;
	  char *dst;
          char **aline = &gpgsm->colon.attic.line;
	  int *alinelen = &gpgsm->colon.attic.linelen;

	  if (gpgsm->colon.attic.linesize
	      < *alinelen + linelen + 1)
	    {
	      char *newline = realloc (*aline, *alinelen + linelen + 1);
	      if (!newline)
		err = gpg_error_from_errno (errno);
	      else
		{
		  *aline = newline;
		  gpgsm->colon.attic.linesize += linelen + 1;
		}
	    }
	  if (!err)
	    {
	      dst = *aline + *alinelen;

	      while (!err && src < end)
		{
		  if (*src == '%' && src + 2 < end)
		    {
		      /* Handle escaped characters.  */
		      ++src;
		      *dst = _gpgme_hextobyte (src);
		      (*alinelen)++;
		      src += 2;
		    }
		  else
		    {
		      *dst = *src++;
		      (*alinelen)++;
		    }
		  
		  if (*dst == '\n')
		    {
		      /* Terminate the pending line, pass it to the colon
			 handler and reset it.  */
		      
		      gpgsm->colon.any = 1;
		      if (*alinelen > 1 && *(dst - 1) == '\r')
			dst--;
		      *dst = '\0';

		      /* FIXME How should we handle the return code?  */
		      err = gpgsm->colon.fnc (gpgsm->colon.fnc_value, *aline);
		      if (!err)
			{
			  dst = *aline;
			  *alinelen = 0;
			}
		    }
		  else
		    dst++;
		}
	    }
          DEBUG2 ("fd %d: D line; final status: %s\n",
                  fd, err? gpg_strerror (err):"ok");
        }
      else if (linelen > 2
	       && line[0] == 'S' && line[1] == ' ')
	{
	  char *rest;
	  gpgme_status_code_t r;
	  
	  rest = strchr (line + 2, ' ');
	  if (!rest)
	    rest = line + linelen; /* set to an empty string */
	  else
	    *(rest++) = 0;

	  r = parse_status (line + 2);

	  if (r >= 0)
	    {
	      if (gpgsm->status.fnc)
		err = gpgsm->status.fnc (gpgsm->status.fnc_value, r, rest);
	    }
	  else
	    fprintf (stderr, "[UNKNOWN STATUS]%s %s", line + 2, rest);
          DEBUG3 ("fd %d: S line (%s) - final status: %s\n",
                  fd, line+2, err? gpg_strerror (err):"ok");
	}
    }
  while (!err && assuan_pending_line (gpgsm->assuan_ctx));
	  
  return err;
}


static gpgme_error_t
add_io_cb (engine_gpgsm_t gpgsm, iocb_data_t *iocbd, gpgme_io_cb_t handler)
{
  gpgme_error_t err;

  err = (*gpgsm->io_cbs.add) (gpgsm->io_cbs.add_priv,
			      iocbd->fd, iocbd->dir,
			      handler, iocbd->data, &iocbd->tag);
  if (err)
    return err;
  if (!iocbd->dir)
    /* FIXME Kludge around poll() problem.  */
    err = _gpgme_io_set_nonblocking (iocbd->fd);
  return err;
}


static gpgme_error_t
start (engine_gpgsm_t gpgsm, const char *command)
{
  gpgme_error_t err;
  int fdlist[5];
  int nfds;

  /* We need to know the fd used by assuan for reads.  We do this by
     using the assumption that the first returned fd from
     assuan_get_active_fds() is always this one.  */
  nfds = assuan_get_active_fds (gpgsm->assuan_ctx, 0 /* read fds */,
                                fdlist, DIM (fdlist));
  if (nfds < 1)
    return gpg_error (GPG_ERR_GENERAL);	/* FIXME */

  /* We duplicate the file descriptor, so we can close it without
     disturbing assuan.  Alternatively, we could special case
     status_fd and register/unregister it manually as needed, but this
     increases code duplication and is more complicated as we can not
     use the close notifications etc.  */
  gpgsm->status_cb.fd = dup (fdlist[0]);
  if (gpgsm->status_cb.fd < 0)
    return gpg_error_from_syserror ();

  if (_gpgme_io_set_close_notify (gpgsm->status_cb.fd,
				  close_notify_handler, gpgsm))
    {
      close (gpgsm->status_cb.fd);
      gpgsm->status_cb.fd = -1;
      return gpg_error (GPG_ERR_GENERAL);
    }

  err = add_io_cb (gpgsm, &gpgsm->status_cb, status_handler);
  if (!err && gpgsm->input_cb.fd != -1)
    err = add_io_cb (gpgsm, &gpgsm->input_cb, _gpgme_data_outbound_handler);
  if (!err && gpgsm->output_cb.fd != -1)
    err = add_io_cb (gpgsm, &gpgsm->output_cb, _gpgme_data_inbound_handler);
  if (!err && gpgsm->message_cb.fd != -1)
    err = add_io_cb (gpgsm, &gpgsm->message_cb, _gpgme_data_outbound_handler);

  if (!err)
    err = map_assuan_error (assuan_write_line (gpgsm->assuan_ctx, command));

  if (!err)
    (*gpgsm->io_cbs.event) (gpgsm->io_cbs.event_priv, GPGME_EVENT_START, NULL);

  return err;
}


#if USE_DESCRIPTOR_PASSING
static gpgme_error_t
gpgsm_reset (void *engine)
{
  engine_gpgsm_t gpgsm = engine;

  /* We must send a reset because we need to reset the list of
     signers.  Note that RESET does not reset OPTION commands. */
  return gpgsm_assuan_simple_command (gpgsm->assuan_ctx, "RESET", NULL, NULL);
}
#endif


static gpgme_error_t
gpgsm_decrypt (void *engine, gpgme_data_t ciph, gpgme_data_t plain)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;

  if (!gpgsm)
    return gpg_error (GPG_ERR_INV_VALUE);

  gpgsm->input_cb.data = ciph;
  err = gpgsm_set_fd (gpgsm, INPUT_FD, map_input_enc (gpgsm->input_cb.data));
  if (err)
    return gpg_error (GPG_ERR_GENERAL);	/* FIXME */
  gpgsm->output_cb.data = plain;
  err = gpgsm_set_fd (gpgsm, OUTPUT_FD, 0);
  if (err)
    return gpg_error (GPG_ERR_GENERAL);	/* FIXME */
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (engine, "DECRYPT");
  return err;
}


static gpgme_error_t
gpgsm_delete (void *engine, gpgme_key_t key, int allow_secret)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;
  char *fpr = key->subkeys ? key->subkeys->fpr : NULL;
  char *linep = fpr;
  char *line;
  int length = 8;	/* "DELKEYS " */

  if (!fpr)
    return gpg_error (GPG_ERR_INV_VALUE);

  while (*linep)
    {
      length++;
      if (*linep == '%' || *linep == ' ' || *linep == '+')
	length += 2;
      linep++;
    }
  length++;

  line = malloc (length);
  if (!line)
    return gpg_error_from_errno (errno);

  strcpy (line, "DELKEYS ");
  linep = &line[8];

  while (*fpr)
    {
      switch (*fpr)
	{
	case '%':
	  *(linep++) = '%';
	  *(linep++) = '2';
	  *(linep++) = '5';
	  break;
	case ' ':
	  *(linep++) = '%';
	  *(linep++) = '2';
	  *(linep++) = '0';
	  break;
	case '+':
	  *(linep++) = '%';
	  *(linep++) = '2';
	  *(linep++) = 'B';
	  break;
	default:
	  *(linep++) = *fpr;
	  break;
	}
      fpr++;
    }
  *linep = '\0';

  gpgsm_clear_fd (gpgsm, OUTPUT_FD);
  gpgsm_clear_fd (gpgsm, INPUT_FD);
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, line);
  free (line);

  return err;
}


static gpgme_error_t
set_recipients (engine_gpgsm_t gpgsm, gpgme_key_t recp[])
{
  gpgme_error_t err = 0;
  assuan_context_t ctx = gpgsm->assuan_ctx;
  char *line;
  int linelen;
  int invalid_recipients = 0;
  int i = 0;

  linelen = 10 + 40 + 1;	/* "RECIPIENT " + guess + '\0'.  */
  line = malloc (10 + 40 + 1);
  if (!line)
    return gpg_error_from_errno (errno);
  strcpy (line, "RECIPIENT ");
  while (!err && recp[i])
    {
      char *fpr;
      int newlen;

      if (!recp[i]->subkeys || !recp[i]->subkeys->fpr)
	{
	  invalid_recipients++;
	  continue;
	}
      fpr = recp[i]->subkeys->fpr;

      newlen = 11 + strlen (fpr);
      if (linelen < newlen)
	{
	  char *newline = realloc (line, newlen);
	  if (! newline)
	    {
	      int saved_errno = errno;
	      free (line);
	      return gpg_error_from_errno (saved_errno);
	    }
	  line = newline;
	  linelen = newlen;
	}
      strcpy (&line[10], fpr);

      err = gpgsm_assuan_simple_command (ctx, line, gpgsm->status.fnc,
					 gpgsm->status.fnc_value);
      /* FIXME: This requires more work.  */
      if (gpg_err_code (err) == GPG_ERR_NO_PUBKEY)
	invalid_recipients++;
      else if (err)
	{
	  free (line);
	  return err;
	}
      i++;
    }
  free (line);
  return gpg_error (invalid_recipients
		    ? GPG_ERR_UNUSABLE_PUBKEY : GPG_ERR_NO_ERROR);
}


static gpgme_error_t
gpgsm_encrypt (void *engine, gpgme_key_t recp[], gpgme_encrypt_flags_t flags,
	       gpgme_data_t plain, gpgme_data_t ciph, int use_armor)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;

  if (!gpgsm)
    return gpg_error (GPG_ERR_INV_VALUE);
  if (!recp)
    return gpg_error (GPG_ERR_NOT_IMPLEMENTED);

  gpgsm->input_cb.data = plain;
  err = gpgsm_set_fd (gpgsm, INPUT_FD, map_input_enc (gpgsm->input_cb.data));
  if (err)
    return err;
  gpgsm->output_cb.data = ciph;
  err = gpgsm_set_fd (gpgsm, OUTPUT_FD, use_armor ? "--armor" : 0);
  if (err)
    return err;
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = set_recipients (gpgsm, recp);

  if (!err)
    err = start (gpgsm, "ENCRYPT");

  return err;
}


static gpgme_error_t
gpgsm_export (void *engine, const char *pattern, unsigned int reserved,
	      gpgme_data_t keydata, int use_armor)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err = 0;
  char *cmd;

  if (!gpgsm || reserved)
    return gpg_error (GPG_ERR_INV_VALUE);

  if (!pattern)
    pattern = "";

  cmd = malloc (7 + strlen (pattern) + 1);
  if (!cmd)
    return gpg_error_from_errno (errno);
  strcpy (cmd, "EXPORT ");
  strcpy (&cmd[7], pattern);

  gpgsm->output_cb.data = keydata;
  err = gpgsm_set_fd (gpgsm, OUTPUT_FD, use_armor ? "--armor" : 0);
  if (err)
    return err;
  gpgsm_clear_fd (gpgsm, INPUT_FD);
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, cmd);
  free (cmd);
  return err;
}


static gpgme_error_t
gpgsm_export_ext (void *engine, const char *pattern[], unsigned int reserved,
		  gpgme_data_t keydata, int use_armor)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err = 0;
  char *line;
  /* Length is "EXPORT " + p + '\0'.  */
  int length = 7 + 1;
  char *linep;

  if (!gpgsm || reserved)
    return gpg_error (GPG_ERR_INV_VALUE);

  if (pattern && *pattern)
    {
      const char **pat = pattern;

      while (*pat)
	{
	  const char *patlet = *pat;

	  while (*patlet)
	    {
	      length++;
	      if (*patlet == '%' || *patlet == ' ' || *patlet == '+')
		length += 2;
	      patlet++;
	    }
	  pat++;
	  length++;
	}
    }
  line = malloc (length);
  if (!line)
    return gpg_error_from_errno (errno);

  strcpy (line, "EXPORT ");
  linep = &line[7];

  if (pattern && *pattern)
    {
      while (*pattern)
	{
	  const char *patlet = *pattern;

	  while (*patlet)
	    {
	      switch (*patlet)
		{
		case '%':
		  *(linep++) = '%';
		  *(linep++) = '2';
		  *(linep++) = '5';
		  break;
		case ' ':
		  *(linep++) = '%';
		  *(linep++) = '2';
		  *(linep++) = '0';
		  break;
		case '+':
		  *(linep++) = '%';
		  *(linep++) = '2';
		  *(linep++) = 'B';
		  break;
		default:
		  *(linep++) = *patlet;
		  break;
		}
	      patlet++;
	    }
	  pattern++;
          if (*pattern)
            *linep++ = ' ';
	}
    }
  *linep = '\0';

  gpgsm->output_cb.data = keydata;
  err = gpgsm_set_fd (gpgsm, OUTPUT_FD, use_armor ? "--armor" : 0);
  if (err)
    return err;
  gpgsm_clear_fd (gpgsm, INPUT_FD);
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, line);
  free (line);
  return err;
}


static gpgme_error_t
gpgsm_genkey (void *engine, gpgme_data_t help_data, int use_armor,
	      gpgme_data_t pubkey, gpgme_data_t seckey)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;

  if (!gpgsm || !pubkey || seckey)
    return gpg_error (GPG_ERR_INV_VALUE);

  gpgsm->input_cb.data = help_data;
  err = gpgsm_set_fd (gpgsm, INPUT_FD, map_input_enc (gpgsm->input_cb.data));
  if (err)
    return err;
  gpgsm->output_cb.data = pubkey;
  err = gpgsm_set_fd (gpgsm, OUTPUT_FD, use_armor ? "--armor" : 0);
  if (err)
    return err;
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, "GENKEY");
  return err;
}


static gpgme_error_t
gpgsm_import (void *engine, gpgme_data_t keydata)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;

  if (!gpgsm)
    return gpg_error (GPG_ERR_INV_VALUE);

  gpgsm->input_cb.data = keydata;
  err = gpgsm_set_fd (gpgsm, INPUT_FD, map_input_enc (gpgsm->input_cb.data));
  if (err)
    return err;
  gpgsm_clear_fd (gpgsm, OUTPUT_FD);
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, "IMPORT");
  return err;
}


static gpgme_error_t
gpgsm_keylist (void *engine, const char *pattern, int secret_only,
	       gpgme_keylist_mode_t mode)
{
  engine_gpgsm_t gpgsm = engine;
  char *line;
  gpgme_error_t err;
  int list_mode = 0;

  if (mode & GPGME_KEYLIST_MODE_LOCAL)
    list_mode |= 1;
  if (mode & GPGME_KEYLIST_MODE_EXTERN)
    list_mode |= 2;

  if (!pattern)
    pattern = "";

  /* Always send list-mode option because RESET does not reset it.  */
  if (asprintf (&line, "OPTION list-mode=%d", (list_mode & 3)) < 0)
    return gpg_error_from_errno (errno);
  err = gpgsm_assuan_simple_command (gpgsm->assuan_ctx, line, NULL, NULL);
  free (line);
  if (err)
    return err;


  /* Always send key validation because RESET does not reset it.  */

  /* Use the validation mode if required.  We don't check for an error
     yet because this is a pretty fresh gpgsm features. */
  gpgsm_assuan_simple_command (gpgsm->assuan_ctx, 
                               (mode & GPGME_KEYLIST_MODE_VALIDATE)?
                               "OPTION with-validation=1":
                               "OPTION with-validation=0" ,
                               NULL, NULL);


  /* Length is "LISTSECRETKEYS " + p + '\0'.  */
  line = malloc (15 + strlen (pattern) + 1);
  if (!line)
    return gpg_error_from_errno (errno);
  if (secret_only)
    {
      strcpy (line, "LISTSECRETKEYS ");
      strcpy (&line[15], pattern);
    }
  else
    {
      strcpy (line, "LISTKEYS ");
      strcpy (&line[9], pattern);
    }

  gpgsm_clear_fd (gpgsm, INPUT_FD);
  gpgsm_clear_fd (gpgsm, OUTPUT_FD);
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, line);
  free (line);
  return err;
}


static gpgme_error_t
gpgsm_keylist_ext (void *engine, const char *pattern[], int secret_only,
		   int reserved, gpgme_keylist_mode_t mode)
{
  engine_gpgsm_t gpgsm = engine;
  char *line;
  gpgme_error_t err;
  /* Length is "LISTSECRETKEYS " + p + '\0'.  */
  int length = 15 + 1;
  char *linep;
  int any_pattern = 0;
  int list_mode = 0;

  if (reserved)
    return gpg_error (GPG_ERR_INV_VALUE);

  if (mode & GPGME_KEYLIST_MODE_LOCAL)
    list_mode |= 1;
  if (mode & GPGME_KEYLIST_MODE_EXTERN)
    list_mode |= 2;

  /* Always send list-mode option because RESET does not reset it.  */
  if (asprintf (&line, "OPTION list-mode=%d", (list_mode & 3)) < 0)
    return gpg_error_from_errno (errno);
  err = gpgsm_assuan_simple_command (gpgsm->assuan_ctx, line, NULL, NULL);
  free (line);
  if (err)
    return err;

  /* Always send key validation because RESET does not reset it.  */
  /* Use the validation mode if required.  We don't check for an error
     yet because this is a pretty fresh gpgsm features. */
  gpgsm_assuan_simple_command (gpgsm->assuan_ctx, 
                               (mode & GPGME_KEYLIST_MODE_VALIDATE)?
                               "OPTION with-validation=1":
                               "OPTION with-validation=0" ,
                               NULL, NULL);


  if (pattern && *pattern)
    {
      const char **pat = pattern;

      while (*pat)
	{
	  const char *patlet = *pat;

	  while (*patlet)
	    {
	      length++;
	      if (*patlet == '%' || *patlet == ' ' || *patlet == '+')
		length += 2;
	      patlet++;
	    }
	  pat++;
	  length++;
	}
    }
  line = malloc (length);
  if (!line)
    return gpg_error_from_errno (errno);
  if (secret_only)
    {
      strcpy (line, "LISTSECRETKEYS ");
      linep = &line[15];
    }
  else
    {
      strcpy (line, "LISTKEYS ");
      linep = &line[9];
    }

  if (pattern && *pattern)
    {
      while (*pattern)
	{
	  const char *patlet = *pattern;

	  while (*patlet)
	    {
	      switch (*patlet)
		{
		case '%':
		  *(linep++) = '%';
		  *(linep++) = '2';
		  *(linep++) = '5';
		  break;
		case ' ':
		  *(linep++) = '%';
		  *(linep++) = '2';
		  *(linep++) = '0';
		  break;
		case '+':
		  *(linep++) = '%';
		  *(linep++) = '2';
		  *(linep++) = 'B';
		  break;
		default:
		  *(linep++) = *patlet;
		  break;
		}
	      patlet++;
	    }
          any_pattern = 1;
          *linep++ = ' ';
	  pattern++;
	}
    }
  if (any_pattern)
    linep--;
  *linep = '\0';

  gpgsm_clear_fd (gpgsm, INPUT_FD);
  gpgsm_clear_fd (gpgsm, OUTPUT_FD);
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, line);
  free (line);
  return err;
}


static gpgme_error_t
gpgsm_sign (void *engine, gpgme_data_t in, gpgme_data_t out,
	    gpgme_sig_mode_t mode, int use_armor, int use_textmode,
	    int include_certs, gpgme_ctx_t ctx /* FIXME */)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;
  char *assuan_cmd;
  int i;
  gpgme_key_t key;

  if (!gpgsm)
    return gpg_error (GPG_ERR_INV_VALUE);

  /* FIXME: This does not work as RESET does not reset it so we can't
     revert back to default.  */
  if (include_certs != GPGME_INCLUDE_CERTS_DEFAULT)
    {
      /* FIXME: Make sure that if we run multiple operations, that we
	 can reset any previously set value in case the default is
	 requested.  */

      if (asprintf (&assuan_cmd, "OPTION include-certs %i", include_certs) < 0)
	return gpg_error_from_errno (errno);
      err = gpgsm_assuan_simple_command (gpgsm->assuan_ctx, assuan_cmd,
					 NULL, NULL);
      free (assuan_cmd);
      if (err)
	return err;
    }

  for (i = 0; (key = gpgme_signers_enum (ctx, i)); i++)
    {
      const char *s = key->subkeys ? key->subkeys->fpr : NULL;
      if (s && strlen (s) < 80)
	{
          char buf[100];

          strcpy (stpcpy (buf, "SIGNER "), s);
          err = gpgsm_assuan_simple_command (gpgsm->assuan_ctx, buf,
                                             NULL, NULL);
	}
      else
        err = gpg_error (GPG_ERR_INV_VALUE);
      gpgme_key_unref (key);
      if (err) 
        return err;
    }

  gpgsm->input_cb.data = in;
  err = gpgsm_set_fd (gpgsm, INPUT_FD, map_input_enc (gpgsm->input_cb.data));
  if (err)
    return err;
  gpgsm->output_cb.data = out;
  err = gpgsm_set_fd (gpgsm, OUTPUT_FD, use_armor ? "--armor" : 0);
  if (err)
    return err;
  gpgsm_clear_fd (gpgsm, MESSAGE_FD);

  err = start (gpgsm, mode == GPGME_SIG_MODE_DETACH
	       ? "SIGN --detached" : "SIGN");
  return err;
}


static gpgme_error_t
gpgsm_verify (void *engine, gpgme_data_t sig, gpgme_data_t signed_text,
	      gpgme_data_t plaintext)
{
  engine_gpgsm_t gpgsm = engine;
  gpgme_error_t err;

  if (!gpgsm)
    return gpg_error (GPG_ERR_INV_VALUE);

  gpgsm->input_cb.data = sig;
  err = gpgsm_set_fd (gpgsm, INPUT_FD, map_input_enc (gpgsm->input_cb.data));
  if (err)
    return err;
  if (plaintext)
    {
      /* Normal or cleartext signature.  */
      gpgsm->output_cb.data = plaintext;
      err = gpgsm_set_fd (gpgsm, OUTPUT_FD, 0);
      gpgsm_clear_fd (gpgsm, MESSAGE_FD);
    }
  else
    {
      /* Detached signature.  */
      gpgsm->message_cb.data = signed_text;
      err = gpgsm_set_fd (gpgsm, MESSAGE_FD, 0);
      gpgsm_clear_fd (gpgsm, OUTPUT_FD);
    }

  if (!err)
    err = start (gpgsm, "VERIFY");

  return err;
}


static void
gpgsm_set_status_handler (void *engine, engine_status_handler_t fnc,
			  void *fnc_value) 
{
  engine_gpgsm_t gpgsm = engine;

  gpgsm->status.fnc = fnc;
  gpgsm->status.fnc_value = fnc_value;
}


static gpgme_error_t
gpgsm_set_colon_line_handler (void *engine, engine_colon_line_handler_t fnc,
			      void *fnc_value) 
{
  engine_gpgsm_t gpgsm = engine;

  gpgsm->colon.fnc = fnc;
  gpgsm->colon.fnc_value = fnc_value;
  gpgsm->colon.any = 0;
  return 0;
}


static void
gpgsm_set_io_cbs (void *engine, gpgme_io_cbs_t io_cbs)
{
  engine_gpgsm_t gpgsm = engine;
  gpgsm->io_cbs = *io_cbs;
}


static void
gpgsm_io_event (void *engine, gpgme_event_io_t type, void *type_data)
{
  engine_gpgsm_t gpgsm = engine;

  if (gpgsm->io_cbs.event)
    (*gpgsm->io_cbs.event) (gpgsm->io_cbs.event_priv, type, type_data);
}


struct engine_ops _gpgme_engine_ops_gpgsm =
  {
    /* Static functions.  */
    _gpgme_get_gpgsm_path,
    gpgsm_get_version,
    gpgsm_get_req_version,
    gpgsm_new,

    /* Member functions.  */
    gpgsm_release,
#if USE_DESCRIPTOR_PASSING
    gpgsm_reset,
#else
    NULL,			/* reset */
#endif
    gpgsm_set_status_handler,
    NULL,		/* set_command_handler */
    gpgsm_set_colon_line_handler,
    gpgsm_set_locale,
    gpgsm_decrypt,
    gpgsm_delete,
    NULL,		/* edit */
    gpgsm_encrypt,
    NULL,		/* encrypt_sign */
    gpgsm_export,
    gpgsm_export_ext,
    gpgsm_genkey,
    gpgsm_import,
    gpgsm_keylist,
    gpgsm_keylist_ext,
    gpgsm_sign,
    NULL,		/* trustlist */
    gpgsm_verify,
    gpgsm_set_io_cbs,
    gpgsm_io_event,
    gpgsm_cancel
  };

#endif /*!HAVE_W32_SYSTEM*/