summaryrefslogtreecommitdiff
path: root/KeyRing.hs
blob: 52e8f67e6d6e6abdab40ec6bb855d085e8aac956 (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
1751
1752
1753
1754
{-# LANGUAGE CPP #-}
{-# LANGUAGE TupleSections #-}
{-# LANGUAGE ViewPatterns #-}
{-# LANGUAGE ExistentialQuantification #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE DeriveFunctor #-}
module KeyRing where

import System.Environment
import Control.Monad
import Data.Maybe
import Data.Char
import Data.Ord
import Data.List
import Data.OpenPGP
import Data.Functor
import Data.Monoid
import Data.Tuple             ( swap )
import Data.Bits              ( (.|.) )
import Control.Applicative    ( liftA2, (<$>) )
import System.Directory       ( getHomeDirectory, doesFileExist )
import Control.Arrow          ( first, second )
import Data.OpenPGP.Util (verify,fingerprint,decryptSecretKey,pgpSign)
import Data.ByteString.Lazy   ( ByteString )
import Text.Show.Pretty as PP ( ppShow )
import Data.Word ( Word8 )
import Data.Binary ( decode )
import ControlMaybe ( handleIO_ )
import Data.ASN1.Types ( toASN1, ASN1Object, fromASN1
       , ASN1(Start,End,IntVal,OID,BitString), ASN1ConstructionType(Sequence) )
import Data.ASN1.BitArray ( BitArray(..), toBitArray )
import Data.ASN1.Encoding ( encodeASN1, encodeASN1', decodeASN1, decodeASN1' )
import Data.ASN1.BinaryEncoding ( DER(..) )
import Data.Time.Clock.POSIX ( getPOSIXTime )
import qualified Data.Map as Map
import qualified Data.ByteString.Lazy as L ( pack, null, readFile, writeFile, ByteString, toChunks )
import qualified Data.ByteString      as S ( unpack, splitAt, concat, cons )
import qualified Data.ByteString.Lazy.Char8 as Char8 ( span, unpack, break, concat, lines )
import qualified Crypto.Types.PubKey.ECC as ECC
import qualified Codec.Binary.Base32 as Base32
import qualified Codec.Binary.Base64 as Base64
import qualified Crypto.Hash.SHA1 as SHA1
import qualified Data.Text as T ( Text, unpack, pack,
        strip, reverse, drop, break, dropAround )
import System.Posix.Types (EpochTime)
import System.Posix.Files ( modificationTime, getFileStatus )
import System.IO (hPutStrLn,withFile,IOMode(..))
import Data.Binary ( encode )

import qualified CryptoCoins as CryptoCoins
import Base58
import FunctorToMaybe
import DotLock

-- DER-encoded elliptic curve ids
nistp256_id  = 0x2a8648ce3d030107
secp256k1_id = 0x2b8104000a

data HomeDir =
    HomeDir { homevar :: String
            , appdir :: String
            , optfile_alts :: [String]
            }

home = HomeDir
    { homevar = "GNUPGHOME"
    , appdir  = ".gnupg"
    , optfile_alts = ["keys.conf","gpg.conf-2","gpg.conf"]
    }

data InputFile = HomeSec | HomePub | ArgFile FilePath | FileDesc Int

type UsageTag = String
type Initializer = String
type PassWordFile = InputFile

data FileType = KeyRingFile PassWordFile | PEMFile UsageTag | WalletFile

data RefType = ConstRef | MutableRef (Maybe Initializer)

initializer (MutableRef x) = x
initializer _              = Nothing


data KeyRingRuntime = KeyRingRuntime
                        { rtPubring :: FilePath
                        , rtSecring :: FilePath
                        , rtRings :: [FilePath]
                        , rtWallets :: [FilePath]
                        , rtGrip :: Maybe String
                        , rtKeyDB :: KeyDB
                        }

data KeyRingAction a = KeyRingAction a | RunTimeAction (KeyRingRuntime -> a)

data KeyRingData = KeyRingData
    { kFiles :: Map.Map InputFile (RefType,FileType)
    , kImports :: Map.Map FilePath (KeyData -> Bool)
    -- ^ indicates what pgp packets get written to which keyring files
    , homeSpec :: Maybe String
    }

resolveInputFile :: FilePath -> FilePath -> InputFile -> [FilePath]
resolveInputFile secring pubring = resolve
 where
    resolve HomeSec = return secring
    resolve HomePub = return pubring
    resolve (ArgFile f) = return f
    resolve _ = []

filesToLock k secring pubring = do
    (f,(rtyp,ftyp)) <- Map.toList (kFiles k)
    case rtyp of
        ConstRef -> []
        MutableRef {} -> resolveInputFile secring pubring f


-- kret :: a -> KeyRingData a
-- kret x = KeyRingData Map.empty Nothing (KeyRingAction x)

todo = error "unimplemented"

data RSAPublicKey = RSAKey MPI MPI deriving (Eq,Show)
data PKCS8_RSAPublicKey = RSAKey8 MPI MPI deriving Show

pkcs8 (RSAKey n e) = RSAKey8 n e

instance ASN1Object RSAPublicKey where
    -- PKCS #1 RSA Public Key
    toASN1 (RSAKey (MPI n) (MPI e))
                  = \xs -> Start Sequence
                         : IntVal n
                         : IntVal e
                         : End Sequence
                         : xs
    fromASN1 _ =
        Left "fromASN1: RSAPublicKey: unexpected format"

instance ASN1Object PKCS8_RSAPublicKey where

    -- PKCS #8 Public key data
    toASN1 (RSAKey8 (MPI n) (MPI e))
                  = \xs -> Start Sequence
                         : Start Sequence
                         : OID [1,2,840,113549,1,1,1]
                         : End Sequence
                         : BitString (toBitArray bs 0)
                         : End Sequence
                         : xs
        where
            pubkey = Start Sequence : IntVal n : IntVal e : End Sequence : []
            bs = encodeASN1' DER pubkey

    fromASN1 (Start Sequence:IntVal modulus:IntVal pubexp:End Sequence:xs) =
        Right (RSAKey8 (MPI modulus) (MPI pubexp) , xs)
    fromASN1 (Start Sequence:Start Sequence:OID [1,2,840,113549,1,1,1]:End Sequence:BitString b:End Sequence:xs) =
        case decodeASN1' DER bs of
            Right as -> fromASN1 as
            Left e -> Left ("fromASN1: RSAPublicKey: "++show e)
      where
        BitArray _ bs = b

    fromASN1 _ =
        Left "fromASN1: RSAPublicKey: unexpected format"

data RSAPrivateKey = RSAPrivateKey
    { rsaN :: MPI
    , rsaE :: MPI
    , rsaD :: MPI
    , rsaP :: MPI
    , rsaQ :: MPI
    , rsaDmodP1 :: MPI
    , rsaDmodQminus1 :: MPI
    , rsaCoefficient :: MPI
    }
 deriving Show

instance ASN1Object RSAPrivateKey where
    toASN1 rsa@(RSAPrivateKey {})
        = \xs -> Start Sequence
               : IntVal 0
               : mpiVal rsaN
               : mpiVal rsaE
               : mpiVal rsaD
               : mpiVal rsaP
               : mpiVal rsaQ
               : mpiVal rsaDmodP1
               : mpiVal rsaDmodQminus1
               : mpiVal rsaCoefficient
               : End Sequence
               : xs
                  where mpiVal f = IntVal x where MPI x = f rsa

    fromASN1 ( Start Sequence
             : IntVal _ -- version
             : IntVal n
             : IntVal e
             : IntVal d
             : IntVal p
             : IntVal q
             : IntVal dmodp1
             : IntVal dmodqminus1
             : IntVal coefficient
             : ys) =
        Right ( privkey, tail $ dropWhile notend ys)
         where
            notend (End Sequence) = False
            notend _              = True
            privkey = RSAPrivateKey
                { rsaN = MPI n
                , rsaE = MPI e
                , rsaD = MPI d
                , rsaP = MPI p
                , rsaQ = MPI q
                , rsaDmodP1 = MPI dmodp1
                , rsaDmodQminus1 = MPI dmodqminus1
                , rsaCoefficient = MPI coefficient
                }
    fromASN1 _ =
        Left "fromASN1: RSAPrivateKey: unexpected format"



data KikiCondition a = KikiSuccess a
    | FailedToLock [FilePath]
    | BadPassphrase
    | FailedToMakeSignature
    | CantFindHome
    | AmbiguousKeySpec
    | CannotImportMasterKey
 deriving ( Functor, Show )

instance FunctorToMaybe KikiCondition where
    functorToMaybe (KikiSuccess a) = Just a
    functorToMaybe _               = Nothing

data KikiReportAction =
        NewPacket String
        | MissingPacket String
        | ExportedSubkey
        | GeneratedSubkeyFile
        | NewWalletKey String
        | YieldSignature
        | YieldSecretKeyPacket String
        | UnableToUpdateExpiredSignature
        | WarnFailedToMakeSignature

data KikiResult a = KikiResult
    { kikiCondition :: KikiCondition a
    , kikiReport :: [ (FilePath, KikiReportAction) ]
    }

keyPacket (KeyData k _ _ _) = packet k

keyMappedPacket (KeyData k _ _ _) = k


usage (NotationDataPacket
        { human_readable = True
        , notation_name  = "usage@"
        , notation_value = u
        }) = Just u
usage _    = Nothing

-- torsig g topk wkun uid timestamp extras = todo
torSigOver topk wkun uid extras
    = CertificationSignature (secretToPublic topk)
                             uid
                             (sigpackets 0x13
                                         subpackets
                                         subpackets_unh)
   where
    subpackets = -- implicit: [ SignatureCreationTimePacket (fromIntegral timestamp) ]
                 tsign
                 ++ extras
    subpackets_unh = [IssuerPacket (fingerprint wkun)]
    tsign = if keykey wkun == keykey topk
             then [] -- tsign doesnt make sense for self-signatures
             else [ TrustSignaturePacket 1 120
                  , RegularExpressionPacket regex]
    -- <[^>]+[@.]asdf\.nowhere>$
    regex = "<[^>]+[@.]"++hostname++">$"
    -- regex = username ++ "@" ++ hostname
    -- username = "[a-zA-Z0-9.][-a-zA-Z0-9.]*\\$?" :: String
    hostname = subdomain' pu ++ "\\." ++ topdomain' pu
    pu = parseUID uidstr where UserIDPacket uidstr = uid
    subdomain' = escape . T.unpack . uid_subdomain
    topdomain' = escape . T.unpack . uid_topdomain
    escape s = concatMap echar s
      where
        echar '|' = "\\|"
        echar '*' = "\\*"
        echar '+' = "\\+"
        echar '?' = "\\?"
        echar '.' = "\\."
        echar '^' = "\\^"
        echar '$' = "\\$"
        echar '\\' = "\\\\"
        echar '[' = "\\["
        echar ']' = "\\]"
        echar c = [c]


keyflags flgs@(KeyFlagsPacket {}) =
    Just . toEnum $
        (   bit 0x1 certify_keys
        .|. bit 0x2 sign_data
        .|. bit 0x4 encrypt_communication
        .|. bit 0x8 encrypt_storage )     :: Maybe PGPKeyFlags
    -- other flags:
    --  split_key
    --  authentication (ssh-client)
    --  group_key
 where
    bit v f = if f flgs then v else 0
keyflags _ = Nothing


data PGPKeyFlags =
    Special
    | Vouch -- Signkey
    | Sign
    | VouchSign
    | Communication
    | VouchCommunication
    | SignCommunication
    | VouchSignCommunication
    | Storage
    | VouchStorage
    | SignStorage
    | VouchSignStorage
    | Encrypt
    | VouchEncrypt
    | SignEncrypt
    | VouchSignEncrypt
 deriving (Eq,Show,Read,Enum)
usageString flgs =
 case flgs of
    Special -> "special"
    Vouch -> "vouch" -- signkey
    Sign -> "sign"
    VouchSign -> "vouch-sign"
    Communication -> "communication"
    VouchCommunication -> "vouch-communication"
    SignCommunication -> "sign-communication"
    VouchSignCommunication -> "vouch-sign-communication"
    Storage -> "storage"
    VouchStorage -> "vouch-storage"
    SignStorage -> "sign-storage"
    VouchSignStorage -> "vouch-sign-storage"
    Encrypt -> "encrypt"
    VouchEncrypt -> "vouch-encrypt"
    SignEncrypt -> "sign-encrypt"
    VouchSignEncrypt -> "vouch-sign-encrypt"




-- matchpr computes the fingerprint of the given key truncated to
-- be the same lenght as the given fingerprint for comparison.
matchpr fp k = reverse $ zipWith const (reverse (fingerprint k)) fp

keyFlags  wkun uids = keyFlags0 wkun (filter isSignaturePacket uids)
keyFlags0 wkun uidsigs = concat
                      [ keyflags
                      , preferredsym
                      , preferredhash
                      , preferredcomp
                      , features ]

 where
    subs = concatMap hashed_subpackets uidsigs
    keyflags = filterOr isflags subs $
               KeyFlagsPacket { certify_keys = True
                              , sign_data = True
                              , encrypt_communication = False
                              , encrypt_storage = False
                              , split_key = False
                              , authentication = False
                              , group_key = False
                              }
    preferredsym = filterOr ispreferedsym subs $
               PreferredSymmetricAlgorithmsPacket
                              [ AES256
                              , AES192
                              , AES128
                              , CAST5
                              , TripleDES
                              ]
    preferredhash = filterOr ispreferedhash subs $
               PreferredHashAlgorithmsPacket
                              [ SHA256
                              , SHA1
                              , SHA384
                              , SHA512
                              , SHA224
                              ]
    preferredcomp = filterOr ispreferedcomp subs $
               PreferredCompressionAlgorithmsPacket
                              [ ZLIB
                              , BZip2
                              , ZIP
                              ]
    features = filterOr isfeatures subs $
               FeaturesPacket { supports_mdc = True
                              }

    filterOr pred xs def = if null rs then [def] else rs where rs=filter pred xs

    isflags (KeyFlagsPacket {}) = True
    isflags _ = False
    ispreferedsym (PreferredSymmetricAlgorithmsPacket {}) = True
    ispreferedsym _ = False
    ispreferedhash (PreferredHashAlgorithmsPacket {}) = True
    ispreferedhash _ = False
    ispreferedcomp (PreferredCompressionAlgorithmsPacket {}) = True
    ispreferedcomp _ = False
    isfeatures (FeaturesPacket {}) = True
    isfeatures _ = False


matchSpec (KeyGrip grip) (_,KeyData p _ _ _) 
    | matchpr grip (packet p)==grip = True
    | otherwise                     = False

matchSpec (KeyTag key tag) (_,KeyData _ sigs _ _) = not . null $ filter match ps
 where
    ps = map (packet .fst) sigs
    match p = isSignaturePacket p
                && has_tag tag p
                && has_issuer key p
    has_issuer key p = isJust $ do
        issuer <- signature_issuer p
        guard $ matchpr issuer key == issuer
    has_tag tag p = tag `elem` mapMaybe usage (hashed_subpackets p)
                    || tag `elem` map usageString (mapMaybe keyflags (hashed_subpackets p))

matchSpec (KeyUidMatch pat) (_,KeyData _ _ uids _) = not $ null us
  where
    us = filter (isInfixOf pat) $ Map.keys uids

data UserIDRecord = UserIDRecord {
    uid_full :: String,
    uid_realname :: T.Text,
    uid_user :: T.Text,
    uid_subdomain :: T.Text,
    uid_topdomain :: T.Text
}
 deriving Show

parseUID str = UserIDRecord {
                    uid_full = str,
                    uid_realname = realname,
                    uid_user = user,
                    uid_subdomain = subdomain,
                    uid_topdomain = topdomain
                }
 where
    text = T.pack str
    (T.strip-> realname, T.dropAround isBracket-> email)
                              = T.break (=='<') text
    (user, T.drop 1-> hostname) = T.break (=='@') email
    ( T.reverse            -> topdomain,
      T.reverse . T.drop 1 -> subdomain)
                              = T.break (=='.') . T.reverse $ hostname
isBracket :: Char -> Bool
isBracket '<' = True
isBracket '>' = True
isBracket _   = False




data KeySpec =
      KeyGrip String
    | KeyTag Packet String
    | KeyUidMatch String
 deriving Show

parseSpec :: String -> String -> (KeySpec,Maybe String)
parseSpec grip spec = (topspec,subspec)
 where
     (topspec0,subspec0) = unprefix '/' spec
     (toptyp,top) = unprefix ':' topspec0
     (subtyp,sub) = unprefix ':' subspec0
     topspec = case () of
                    _ | null top && or [ subtyp=="fp"
                                       , null subtyp && is40digitHex sub
                                       ]
                                 -> KeyGrip sub
                    _ | null top && null grip -> KeyUidMatch sub
                    _ | null top -> KeyGrip grip
                    _ | toptyp=="fp" || (null toptyp && is40digitHex top)
                                 -> {- trace "using top" $ -} KeyGrip top
                    _ | toptyp=="u" -> KeyUidMatch top
                    _ | otherwise -> KeyUidMatch top
     subspec = case subtyp of
                "t" -> Just sub
                "fp" | top=="" -> Nothing
                "" | top=="" && is40digitHex sub -> Nothing
                "" -> listToMaybe sub >> Just sub

     is40digitHex xs = ys == xs && length ys==40
      where
        ys = filter ishex xs
        ishex c | '0' <= c && c <= '9' = True
                | 'A' <= c && c <= 'F' = True
                | 'a' <= c && c <= 'f' = True
        ishex c = False

     unprefix c spec = if null (snd p) then swap p else (fst p, tail (snd p))
      where p = break (==c) spec


filterMatches :: KeySpec -> [(KeyKey,KeyData)] -> [(KeyKey,KeyData)]
filterMatches spec ks = filter (matchSpec spec) ks


buildKeyDB :: FilePath -> FilePath -> Maybe String -> KeyRingData
              -> IO (KikiCondition ((KeyDB,Maybe String,Maybe Packet),[(FilePath,KikiReportAction)]))
buildKeyDB secring pubring grip0 keyring = do
    let isring (KeyRingFile {}) = True
        isring _                = False

        getUsage (PEMFile usage) = return usage
        getUsage _               = mzero

        iswallet WalletFile = True
        iswallet _          = False

        files isring = do
            (f,(rtyp,ftyp)) <- Map.toList (kFiles keyring)
            guard (isring ftyp)
            resolveInputFile secring pubring f

        readp n = fmap (n,) (readPacketsFromFile n)

        readw wk n = fmap (n,) (readPacketsFromWallet wk n)

        importWalletKey wk db' (top,fname,sub,tag) = do
            try db' $ \(db',report0) -> do
            r <- doImportG doDecrypt 
                      db'
                      (fmap keykey $ maybeToList wk)
                      tag
                      fname
                      sub
            try r $ \(db'',report) -> do
            return $ KikiSuccess (db'', report0 ++ report)

        importPEMKey db' tup = do
            try db' $ \(db',report0) -> do
            r <- doImport doDecrypt 
                      db'
                      tup
            try r $ \(db'',report) -> do
            return $ KikiSuccess (db'', report0 ++ report)

        doDecrypt = todo

    -- KeyRings (todo: KikiCondition reporting?)
    (db_rings,wk,grip) <- do
        ms <- mapM readp (files isring)
        let grip = grip0 `mplus` (fingerprint <$> fstkey)
              where
                fstkey = listToMaybe $ mapMaybe isSecringKey ms 
                          where isSecringKey (fn,Message ps)
                                    | fn==secring = listToMaybe ps
                                isSecringKey _  = Nothing
            db_rings = foldl' (uncurry . merge) Map.empty ms

            wk = listToMaybe $ do
                    fp <- maybeToList grip
                    elm <- Map.toList db_rings
                    guard $ matchSpec (KeyGrip fp) elm
                    return $ keyPacket (snd elm)
        return (db_rings,wk,grip)

    -- Wallets
    wms <- mapM (readw wk) (files iswallet)
    let wallet_keys = do
            maybeToList wk
            (fname,xs) <- wms
            (_,sub,(_,m)) <- xs
            (tag,top) <- Map.toList m
            return (top,fname,sub,tag)
    db <- foldM (importWalletKey wk) (KikiSuccess (db_rings,[])) wallet_keys
    try db $ \(db,reportWallets) -> do

    -- PEM files
    let pems = do
            (n,(rtyp,ftyp)) <- Map.toList $ kFiles keyring
            grip <- maybeToList grip
            (topspec,subspec) <- fmap (parseSpec grip) $ getUsage ftyp
            n <- resolveInputFile secring pubring n
            let ms = map fst $ filterMatches topspec (Map.toList db)
                cmd = initializer rtyp
            return (n,subspec,ms,cmd)
    imports <- filterM (\(n,_,_,_) -> doesFileExist n) pems
    db <- foldM importPEMKey (KikiSuccess (db,[])) imports
    try db $ \(db,reportPEMs) -> do

    return $ KikiSuccess ( (db, grip, wk), reportWallets ++ reportPEMs )

torhash key = maybe "" id $ derToBase32 <$> derRSA key

derToBase32 = map toLower . Base32.encode . S.unpack . SHA1.hashlazy

derRSA rsa = do
    k <- rsaKeyFromPacket rsa
    return $ encodeASN1 DER (toASN1 k [])

try :: Monad m => KikiCondition a -> (a -> m (KikiCondition b)) -> m (KikiCondition b)
try x body =
    case functorToEither x of
           Left e -> return e
           Right x -> body x

readKeyFromFile False "PEM" fname = do
    -- warn $ fname ++ ": reading ..."
    -- Note: The key's timestamp is included in it's fingerprint.
    --       Therefore, we should attempt to preserve it.
    timestamp <- handleIO_ (error $ fname++": modificaiton time?") $ 
                    modificationTime <$> getFileStatus fname
    input <- L.readFile fname
    let dta = extractPEM "RSA PRIVATE KEY" input
    -- Char8.putStrLn $ "dta = " <> dta
    let rsa = do
           e <- decodeASN1 DER . L.pack <$> Base64.decode (Char8.unpack dta)
           asn1 <- either (const Nothing) Just e
           k <- either (const Nothing) (Just . fst) (fromASN1 asn1)
           let _ = k :: RSAPrivateKey
           return k
    -- putStrLn $ "rsa = "++ show rsa
    return . Message $ do
        rsa <- maybeToList rsa
        return $ SecretKeyPacket
            { version = 4
            , timestamp = toEnum (fromEnum timestamp)
            , key_algorithm = RSA
            , key = [ -- public fields...
                     ('n',rsaN rsa)
                    ,('e',rsaE rsa)
                    -- secret fields
                    ,('d',rsaD rsa)
                    ,('p',rsaQ rsa) -- Note: p & q swapped
                    ,('q',rsaP rsa) -- Note: p & q swapped
                    ,('u',rsaCoefficient rsa)
                    ]
            -- , ecc_curve = def
            , s2k_useage = 0
            , s2k = S2K 100 ""
            , symmetric_algorithm = Unencrypted
            , encrypted_data = ""
            , is_subkey = True
            }
readKeyFromFile is_public fmt filename = error ("unimplemented key type: "++fmt)

extractPEM typ pem = dta
 where
    dta = case ys of
            _:dta_lines -> Char8.concat dta_lines
            []          -> ""
    xs = dropWhile (/="-----BEGIN " <> typ <> "-----") (Char8.lines pem)
    ys = takeWhile (/="-----END " <> typ <> "-----") xs


doImport
  :: Ord k =>
     (Packet -> IO (KikiCondition Packet))
     -> Map.Map k KeyData
     -> ([Char], Maybe [Char], [k], t)
     -> IO (KikiCondition (Map.Map k KeyData, [(FilePath,KikiReportAction)]))
doImport doDecrypt db (fname,subspec,ms,_) = do
    let fetchkey = readKeyFromFile False "PEM" fname
    flip (maybe $ return CannotImportMasterKey)
         subspec $ \tag -> do
    Message parsedkey <- fetchkey
    flip (maybe $ return $ KikiSuccess (db,[]))
         (listToMaybe parsedkey) $ \key -> do
    let (m0,tailms) = splitAt 1 ms
    if (not (null tailms) || null m0)
        then return AmbiguousKeySpec
        else doImportG doDecrypt db m0 tag fname key

doImportG
  :: Ord k =>
     (Packet -> IO (KikiCondition Packet))
     -> Map.Map k KeyData
     -> [k]
     -> [Char]
     -> [Char]
     -> Packet
     -> IO (KikiCondition (Map.Map k KeyData, [(FilePath,KikiReportAction)]))
doImportG doDecrypt db m0 tag fname key = do
    let kk = head m0
        Just (KeyData top topsigs uids subs) = Map.lookup kk db
        subkk = keykey key
        (is_new, subkey) = maybe (True, SubKey (mappedPacket fname key)
                                               [])
                                 ( (False,) . addOrigin )
                                 (Map.lookup subkk subs)
                             where
                                addOrigin (SubKey mp sigs) = 
                                    let mp' = mp
                                          { locations = Map.insert fname
                                                             (origin (packet mp) (-1))
                                                             (locations mp) }
                                    in SubKey mp' sigs
        subs' = Map.insert subkk subkey subs

        istor = do
            guard (tag == "tor")
            return $ "Anonymous <root@" ++ take 16 (torhash key) ++ ".onion>"

    uids' <- flip (maybe $ return $ KikiSuccess (uids,[])) istor $ \idstr -> do
                let has_torid = do
                     -- TODO: check for omitted real name field
                     (sigtrusts,om) <- Map.lookup idstr uids
                     listToMaybe $ do
                         s <- (signatures $ Message (packet top:UserIDPacket idstr:map (packet . fst) sigtrusts))
                         signatures_over $ verify (Message [packet top]) s
                flip (flip maybe $ const $ return $ KikiSuccess (uids,[])) has_torid $ do
                wkun <- doDecrypt (packet top)

                try wkun $ \wkun -> do

                let keyflags = keyFlags wkun (map packet $ flattenAllUids fname True uids)
                    uid = UserIDPacket idstr
                    -- sig_ov = fst $ torsig g (packet top) wkun uid timestamp keyflags
                    tor_ov = torSigOver (packet top) wkun uid keyflags
                sig_ov <- pgpSign (Message [wkun])
                                  tor_ov
                                  SHA1
                                  (fingerprint wkun)
                flip (maybe $ return $ KikiSuccess (uids,[(fname, WarnFailedToMakeSignature)]))
                     (sig_ov >>= listToMaybe . signatures_over)
                     $ \sig -> do
                let om = Map.singleton fname (origin sig (-1))
                    trust = Map.empty
                return $ KikiSuccess 
                    ( Map.insert idstr ([( (mappedPacket fname sig) {locations=om}
                                         , trust)],om) uids
                    , [] )

    try uids' $ \(uids',report) -> do

    let SubKey subkey_p subsigs = subkey
        wk = packet top
        (xs',minsig,ys') = findTag tag wk key subsigs
        doInsert mbsig db = do
            sig' <- makeSig doDecrypt top fname subkey_p tag mbsig
            try sig' $ \(sig',report) -> do
            report <- return $ fmap (fname,) report ++ [(fname, YieldSignature)]
            let subs' = Map.insert subkk
                                   (SubKey subkey_p $ xs'++[sig']++ys')
                                   subs
            return $ KikiSuccess ( Map.insert kk (KeyData top topsigs uids' subs') db
                                 , report )

    report <- let f = if is_new then (++[(fname,YieldSecretKeyPacket s)])
                                    else id
                  s = show (fmap fst minsig,fingerprint key)
              in return (f report)

    case minsig of
        Nothing          -> doInsert Nothing db    -- we need to create a new sig
        Just (True,sig)  -> -- we can deduce is_new == False
                            -- we may need to add a tor id
                            return $ KikiSuccess ( Map.insert kk (KeyData top topsigs uids' subs') db
                                                 , report )
        Just (False,sig) -> doInsert (Just sig) db -- We have a sig, but is missing usage@ tag

isCryptoCoinKey p =
    and [ isKey p
        , key_algorithm p == ECDSA
        , lookup 'c' (key p) == Just (MPI secp256k1_id)
        ]

getCryptoCoinTag p | isSignaturePacket p = do
    -- CryptoCoins.secret
    let sps = hashed_subpackets p ++ unhashed_subpackets p
    u <- listToMaybe $ mapMaybe usage sps
    CryptoCoins.lookupNetwork CryptoCoins.network_name u
getCryptoCoinTag _ = Nothing


coinKeysOwnedBy :: KeyDB -> Maybe Packet -> [(CryptoCoins.CoinNetwork,MappedPacket)]
coinKeysOwnedBy db wk = do
    wk <- maybeToList wk
    let kk = keykey wk
    KeyData top topsigs uids subs <- maybeToList $ Map.lookup kk db
    (subkk,SubKey mp sigs) <- Map.toList subs
    let sub = packet mp
    guard $ isCryptoCoinKey sub
    tag <- take 1 $ mapMaybe getCryptoCoinTag (map (packet . fst) sigs)
    return (tag,mp)

walletImportFormat idbyte k = secret_base58_foo
 where
    -- isSecret (SecretKeyPacket {}) = True
    -- isSecret _                    = False
    secret_base58_foo = base58_encode seckey
    Just d = lookup 'd' (key k)
    (_,bigendian) = S.splitAt 2 (S.concat $ L.toChunks $ encode d)
    seckey = S.cons idbyte bigendian

writeWalletKeys :: KeyRingData -> KeyDB -> Maybe Packet -> IO (KikiCondition [(FilePath,KikiReportAction)])
writeWalletKeys krd db wk = do
    let cs = db `coinKeysOwnedBy` wk
    -- export wallet keys
        isMutableWallet (MutableRef {}) WalletFile = True
        isMutableWallet _ _ = False
        files pred = do
            (f,(rtyp,ftyp)) <- Map.toList (kFiles krd)
            guard (pred rtyp ftyp)
            resolveInputFile "" "" f
    let writeWallet report n = do
        let cs' = do
            (nw,mp) <- cs
            -- let fns = Map.keys (locations mp)
            -- trace ("COIN KEY: "++show fns) $ return ()
            guard . not $ Map.member n (locations mp)
            let wip = walletImportFormat (CryptoCoins.private_byte_id nw) (packet mp)
            return (CryptoCoins.network_name nw,wip)
        handleIO_ (return report) $ do
        withFile n AppendMode $ \fh -> do
        rs <- forM cs' $ \(net,wip) -> do
            hPutStrLn fh wip
            return (n, NewWalletKey net)
        return (report ++ rs)
    report <- foldM writeWallet [] (files isMutableWallet)
    return $ KikiSuccess report

ifSecret (SecretKeyPacket {}) t f = t
ifSecret _                    t f = f

showPacket :: Packet -> String
showPacket p | isKey p   = (if is_subkey p 
                              then showPacket0 p
                              else ifSecret p "----Secret-----" "----Public-----")
                           ++ " "++show (key_algorithm p)++" "++fingerprint p
             | isUserID p = showPacket0 p ++ " " ++ show (uidkey p)
             | otherwise = showPacket0 p
showPacket0 p = concat . take 1 $ words (show p)


writeRingKeys :: KeyRingData -> KeyDB -> Maybe Packet
                -> FilePath -> FilePath
                -> IO (KikiCondition [(FilePath,KikiReportAction)])
writeRingKeys krd db wk secring pubring = do
    let ks = Map.elems db
        {-
        fs = Map.keys (foldr unionfiles Map.empty ks)
                where unionfiles (KeyData p _ _ _) m =
                        Map.union m (locations p)
        -}
        isring (KeyRingFile {}) = True
        isring _                = False
        isMutable (MutableRef {}) = True
        isMutable _               = False
        fs = do
            (f,(rtyp,ftyp)) <- Map.toList (kFiles krd)
            guard (isring ftyp)
            n <- resolveInputFile secring pubring f
            return (n,isMutable rtyp)
        fromfile f (KeyData p _ _ _) = Map.member f $ locations p
    let s = do
        (f,mutable) <- fs
        let x = do
                d@(KeyData p _ _ _) <- filter (fromfile f) (sortByHint f keyMappedPacket ks)
                n <- maybeToList $ Map.lookup f (locations p)
                flattenTop f (originallyPublic n) d
            changes = filter isnew x
                where isnew p = isNothing (Map.lookup f $ locations p)
        {-
        trace (unlines $ ( (f ++ ":") : map (showPacket . packet) x) ++
                  ( "CHANGES: " : map (("  "++) . showPacket . packet) changes)) $ do
        -}
        guard (not $ null changes)
        return ((f,mutable),(changes,x))
    let (towrites,report) = (\f -> foldl f ([],[]) s) $
         \(ws,report) ((f,mutable),(changes,x)) ->
            if mutable
                then 
                     let rs = flip map changes $ \c -> (f, NewPacket $ showPacket (packet c))
                     in (ws++[(f,x)],report++rs)
                else
                     let rs = flip map changes $ \c -> (f,MissingPacket (showPacket (packet c)))
                     in (ws,report++rs)
    forM_ towrites $ \(f,x) -> do
        let m = Message $ map packet x
        -- warn $ "writing "++f
        L.writeFile f (encode m)
    return $ KikiSuccess report


runKeyRing :: KeyRingData -> (KeyRingRuntime -> a) -> IO (KikiResult a)
runKeyRing keyring op = do
    homedir <- getHomeDir (homeSpec keyring)
    let try' :: KikiCondition a -> (a -> IO (KikiResult b)) -> IO (KikiResult b)
        try' v body =
            case functorToEither v of
                   Left e -> return $ KikiResult e []
                   Right wkun -> body wkun
    try' homedir $ \(homedir,secring,pubring,grip0) -> do
    let tolocks = filesToLock keyring secring pubring
    lks <- forM tolocks $ \f -> do
        lk <- dotlock_create f 0
        v <- flip (maybe $ return Nothing) lk $ \lk -> do
                e <- dotlock_take lk (-1)
                if e==0 then return $ Just lk
                        else dotlock_destroy lk >> return Nothing
        return (v,f)
    let (lked, map snd -> failed) = partition (isJust . fst) lks
        ret = if null failed then KikiSuccess () else FailedToLock failed
    ret <- case functorToEither ret of
      Right {} -> do
         bresult <- buildKeyDB secring pubring grip0 keyring -- build db
         try' bresult $ \((db,grip,wk),report1) -> do
             a <- return $ op KeyRingRuntime
                            { rtPubring = pubring
                            , rtSecring = secring
                            , rtRings = [] -- todo secring:pubring:keyringFiles keyring
                            , rtWallets = [] -- todo walletFiles keyring
                            , rtGrip = grip
                            , rtKeyDB = db
                            }
             r <- writeWalletKeys keyring db wk
             try' r $ \report2 -> do
             r <- writeRingKeys keyring db wk secring pubring
             try' r $ \report3 -> do
             return $ KikiResult (KikiSuccess a) (report1 ++ report3)
      Left err -> return $ KikiResult err []

    forM_ lked $ \(Just lk, fname) -> do dotlock_release lk
                                         dotlock_destroy lk -- todo: verify we want this

    return ret


parseOptionFile fname = do
    xs <- fmap lines (readFile fname)
    let ys = filter notComment xs
        notComment ('#':_) = False
        notComment cs      = not (all isSpace cs)
    return ys

-- | returns ( home directory
--           , path to secret ring
--           , path to public ring
--           , fingerprint of working key
--           )
getHomeDir :: Maybe FilePath -> IO (KikiCondition (FilePath,FilePath,FilePath,Maybe String))
getHomeDir protohome = do
        homedir <- envhomedir protohome
        flip (maybe (return CantFindHome))
             homedir $ \homedir -> do
        -- putStrLn $ "homedir = " ++show homedir
        let secring = homedir ++ "/" ++ "secring.gpg"
            pubring = homedir ++ "/" ++ "pubring.gpg"
        -- putStrLn $ "secring = " ++ show secring
        workingkey <- getWorkingKey homedir
        return $ KikiSuccess (homedir,secring,pubring,workingkey)
 where
    envhomedir opt = do
        gnupghome <- lookupEnv (homevar home) >>=
                  \d -> return $ d >>= guard . (/="") >> d
        homed <- flip fmap getHomeDirectory $
                  \d -> fmap (const d) $ guard (d/="")
        let homegnupg = (++('/':(appdir home))) <$> homed
        let val = (opt `mplus` gnupghome `mplus` homegnupg)
        return $ val
    
    -- TODO: rename this to getGrip
    getWorkingKey homedir = do
        let o = Nothing
            h = Just homedir
        ofile <- fmap listToMaybe . flip (maybe (return [])) h $ \h ->
                let optfiles = map (second ((h++"/")++))
                                   (maybe optfile_alts' (:[]) o')
                    optfile_alts' = zip (False:repeat True) (optfile_alts home)
                    o' = fmap (False,) o
                in filterM (doesFileExist . snd) optfiles
        args <- flip (maybe $ return []) ofile $
            \(forgive,fname) -> parseOptionFile fname
        let config = map (topair . words) args
                        where topair (x:xs) = (x,xs)
        return $ lookup "default-key" config >>= listToMaybe

#if MIN_VERSION_base(4,6,0)
#else
lookupEnv var =
    handleIO_ (return Nothing) $ fmap Just (getEnv var)
#endif

isKey (PublicKeyPacket {}) = True
isKey (SecretKeyPacket {}) = True
isKey _                    = False

isUserID (UserIDPacket {}) = True
isUserID _                 = False

isTrust (TrustPacket {}) = True
isTrust _                = False

sigpackets typ hashed unhashed = return $
    signaturePacket
        4 -- version
        typ -- 0x18 subkey binding sig, or 0x19 back-signature
        RSA
        SHA1
        hashed
        unhashed
        0 -- Word16 -- Left 16 bits of the signed hash value
        [] -- [MPI]

secretToPublic pkt@(SecretKeyPacket {}) =
    PublicKeyPacket { version = version pkt
                    , timestamp = timestamp pkt
                    , key_algorithm = key_algorithm pkt
                    -- , ecc_curve = ecc_curve pkt
                    , key = let seckey = key pkt
                                pubs = public_key_fields (key_algorithm pkt)
                            in filter (\(k,v) -> k `elem` pubs) seckey
                    , is_subkey = is_subkey pkt
                    , v3_days_of_validity = Nothing
                    }
secretToPublic pkt = pkt



slurpWIPKeys :: System.Posix.Types.EpochTime -> L.ByteString -> ( [(Word8,Packet)], [L.ByteString])
slurpWIPKeys stamp "" = ([],[])
slurpWIPKeys stamp cs =
    let (b58,xs) = Char8.span (\x -> elem x base58chars) cs
        mb        = decode_btc_key stamp (Char8.unpack b58)
    in if L.null b58 
        then let (ys,xs') = Char8.break (\x -> elem x base58chars) cs
                 (ks,js)  = slurpWIPKeys stamp xs'
             in (ks,ys:js) 
        else let (ks,js) = slurpWIPKeys stamp xs
             in maybe (ks,b58:js) (\(net,Message [k])->((net,k):ks,js)) mb


decode_btc_key timestamp str = do
    (network_id,us) <- base58_decode str
    return . (network_id,) $ Message $ do
        let d = foldl' (\a b->a*256+b) 0 (map fromIntegral us :: [Integer])
            {-
            xy = secp256k1_G `pmul` d
            x = getx xy
            y = gety xy
            -- y² = x³ + 7 (mod p)
            y' = sqrtModP' (applyCurve secp256k1_curve x) (getp secp256k1_curve)
            y'' = sqrtModPList (applyCurve secp256k1_curve x) (getp secp256k1_curve)
            -}
            secp256k1 = ECC.getCurveByName ECC.SEC_p256k1
            ECC.Point x y = ECC.ecc_g $ ECC.common_curve secp256k1
            -- pub = cannonical_eckey x y
            -- hash = S.cons network_id . RIPEMD160.hash . SHA256.hash . S.pack $  pub
            -- address = base58_encode hash
            -- pubstr = concatMap (printf "%02x") $ pub
            -- _ = pubstr :: String
        return $ {- trace (unlines ["pub="++show pubstr
                                ,"add="++show address
                                ,"y  ="++show y
                                ,"y' ="++show y'
                                ,"y''="++show y'']) -}
            SecretKeyPacket 
            { version = 4
            , timestamp = toEnum (fromEnum timestamp)
            , key_algorithm = ECDSA
            , key = [ -- public fields...
                     ('c',MPI secp256k1_id) -- secp256k1 (bitcoin curve)
                    ,('l',MPI 256)
                    ,('x',MPI x)
                    ,('y',MPI y)
                    -- secret fields
                    ,('d',MPI d)
                    ]
            , s2k_useage = 0
            , s2k = S2K 100 ""
            , symmetric_algorithm = Unencrypted
            , encrypted_data = ""
            , is_subkey = True
            }

rsaKeyFromPacket :: Packet -> Maybe RSAPublicKey
rsaKeyFromPacket p@(PublicKeyPacket {}) = do
    n <- lookup 'n' $ key p
    e <- lookup 'e' $ key p
    return $ RSAKey n e
rsaKeyFromPacket p@(SecretKeyPacket {}) = do
    n <- lookup 'n' $ key p
    e <- lookup 'e' $ key p
    return $ RSAKey n e
rsaKeyFromPacket _ = Nothing


readPacketsFromWallet :: 
    Maybe Packet
    -> FilePath 
    -> IO [(Packet,Packet,(Packet,Map.Map FilePath Packet))]
readPacketsFromWallet wk fname = do
    timestamp <- handleIO_ (error $ fname++": modificaiton time?") $ 
                    modificationTime <$> getFileStatus fname
    input <- L.readFile fname
    let (ks,_) = slurpWIPKeys timestamp input
    when (not (null ks)) $ do
        -- decrypt wk
        -- create sigs
        -- return key/sig pairs
        return ()
    return $ do
        wk <- maybeToList wk
        guard (not $ null ks)
        let prep (tagbyte,k) = (wk,k,(k,Map.singleton tag wk))
                                where tag = CryptoCoins.nameFromSecretByte tagbyte
        (wk,MarkerPacket,(MarkerPacket,Map.empty))
         :map prep ks

readPacketsFromFile :: FilePath -> IO Message
readPacketsFromFile fname = do
    -- warn $ fname ++ ": reading..."
    input <- L.readFile fname
#if MIN_VERSION_binary(0,6,4)
    return $
      case decodeOrFail input of
        Right (_,_,msg ) -> msg
        Left  (_,_,_)    -> trace (fname++": read fail") $ Message []
#else
    return $ decode input
#endif

now = floor <$> Data.Time.Clock.POSIX.getPOSIXTime

signature_time ov = case if null cs then ds else cs of
                                [] -> minBound
                                xs -> last (sort xs)
          where
            ps = signatures_over ov
            ss = filter isSignaturePacket ps
            cs = concatMap (concatMap creationTime . hashed_subpackets) ss
            ds = concatMap (concatMap creationTime . unhashed_subpackets) ss
            creationTime (SignatureCreationTimePacket t) = [t]
            creationTime _                               = []

splitAtMinBy comp xs = minimumBy comp' xxs
 where
    xxs = zip (inits xs) (tails xs)
    comp' (_,as) (_,bs) = compM (listToMaybe as) (listToMaybe bs)
    compM (Just a) (Just b) = comp a b
    compM Nothing  mb       = GT
    compM _        _        = LT



findTag tag wk subkey subsigs = (xs',minsig,ys')
         where
            vs = map (\sig ->
                          (sig, do
                                sig <- Just (packet . fst $ sig)
                                guard (isSignaturePacket sig)
                                guard $ flip isSuffixOf
                                             (fingerprint wk)
                                        . maybe "%bad%" id
                                        . signature_issuer
                                        $ sig
                                listToMaybe $
                                  map (signature_time . verify (Message [wk]))
                                      (signatures $ Message [wk,subkey,sig])))
                     subsigs
            (xs,ys) = splitAtMinBy (comparing (Down . snd)) vs
            xs' = map fst xs
            ys' = map fst $ if isNothing minsig then ys else drop 1 ys
            minsig = do
                (sig,ov) <- listToMaybe ys
                ov
                let hs = filter (\p->isNotation p && notation_name p=="usage@")
                                (hashed_subpackets . packet . fst $ sig)
                    ks = map notation_value hs
                    isNotation (NotationDataPacket {}) = True
                    isNotation _ = False
                return (tag `elem` ks, sig)


makeSig doDecrypt top fname subkey_p tag mbsig = do
    let wk = packet top
    wkun <- doDecrypt wk
    try wkun $ \wkun -> do
    let grip = fingerprint wk
        addOrigin new_sig = do
            flip (maybe $ return FailedToMakeSignature)
                 (new_sig >>= listToMaybe . signatures_over) 
                 $ \new_sig -> do
            let mp' = mappedPacket fname new_sig
            return $ KikiSuccess (mp', Map.empty)
        parsedkey = [packet $ subkey_p]
        hashed0 =
                    [ KeyFlagsPacket
                        { certify_keys = False
                        , sign_data = False
                        , encrypt_communication = False
                        , encrypt_storage = False
                        , split_key = False
                        , authentication = True
                        , group_key = False }
                    , NotationDataPacket
                        { human_readable = True
                        , notation_name = "usage@"
                        , notation_value = tag
                        }
                    -- implicitly added:
                    -- , SignatureCreationTimePacket (fromIntegral timestamp)
                    ]
        subgrip = fingerprint (head parsedkey)

    back_sig <- pgpSign (Message parsedkey)
                        (SubkeySignature wk
                                         (head parsedkey)
                                         (sigpackets 0x19
                                                     hashed0
                                                     [IssuerPacket subgrip]))
                        (if key_algorithm (head parsedkey)==ECDSA
                            then SHA256
                            else SHA1)
                        subgrip
    let iss = IssuerPacket (fingerprint wk)
        cons_iss back_sig = iss : map EmbeddedSignaturePacket (signatures_over back_sig)
        unhashed0 = maybe [iss] cons_iss back_sig

    new_sig <- pgpSign (Message [wkun])
                       (SubkeySignature wk
                                        (head parsedkey)
                                        (sigpackets 0x18
                                                   hashed0
                                                   unhashed0))
                      SHA1
                      grip
    let newSig = do
            r <- addOrigin new_sig
            return $ fmap (,[]) r
    flip (maybe newSig) mbsig $ \(mp,trustmap) -> do
    let sig = packet mp
        isCreation (SignatureCreationTimePacket {}) = True
        isCreation _ = False
        isExpiration (SignatureExpirationTimePacket {}) = True
        isExpiration _ = False
        (cs,ps) = partition isCreation (hashed_subpackets sig)
        (es,qs) = partition isExpiration ps
        stamp = listToMaybe . sortBy (comparing Down) $
                 map unwrap cs where unwrap (SignatureCreationTimePacket x) = x
        exp = listToMaybe $ sort $
                 map unwrap es where unwrap (SignatureExpirationTimePacket x) = x
        expires = liftA2 (+) stamp exp
    timestamp <- now
    if fmap ( (< timestamp) . fromIntegral) expires == Just True then do
        return $ KikiSuccess ((mp,trustmap), [ UnableToUpdateExpiredSignature ] )
    else do
        let times = (:) (SignatureExpirationTimePacket (fromIntegral timestamp))
                        $ maybeToList $ do
                            e <- expires
                            return $ SignatureExpirationTimePacket (e - fromIntegral timestamp)
            notation = NotationDataPacket
                        { notation_name = "usage@"
                        , notation_value = tag
                        , human_readable = True }
            sig' = sig { hashed_subpackets = times ++ [notation] ++ qs }
        new_sig <- pgpSign (Message [wkun])
                           (SubkeySignature wk
                                            (packet subkey_p)
                                            [sig'] )
                           SHA1
                           (fingerprint wk)
        newsig <- addOrigin new_sig
        return $ fmap (,[]) newsig



data OriginFlags = OriginFlags {
        originallyPublic :: Bool,
        originalNum :: Int
    }
    deriving Show
type OriginMap = Map.Map FilePath OriginFlags
data MappedPacket = MappedPacket
        { packet :: Packet
        , usage_tag :: Maybe String
        , locations :: OriginMap
        }

type TrustMap = Map.Map FilePath Packet
type SigAndTrust = ( MappedPacket
                   , TrustMap     ) -- trust packets

type KeyKey = [ByteString]
data SubKey = SubKey MappedPacket [SigAndTrust]
data KeyData = KeyData MappedPacket    -- main key
                       [SigAndTrust]  -- sigs on main key
                       (Map.Map String ([SigAndTrust],OriginMap))  -- uids
                       (Map.Map KeyKey SubKey)    -- subkeys

type KeyDB = Map.Map KeyKey KeyData

origin :: Packet -> Int -> OriginFlags
origin p n = OriginFlags ispub n
 where
    ispub = case p of
                    SecretKeyPacket {} -> False
                    _                  -> True

mappedPacket filename p = MappedPacket 
    { packet = p
    , usage_tag = Nothing
    , locations = Map.singleton filename (origin p (-1))
    }

keykey key =
    -- Note: The key's timestamp is included in it's fingerprint.
    --       Therefore, the same key with a different timestamp is
    --       considered distinct using this keykey implementation.
    fingerprint_material (key {timestamp=0}) -- TODO: smaller key?

uidkey (UserIDPacket str) = str

merge :: KeyDB -> FilePath -> Message -> KeyDB
merge db filename (Message ps) = merge_ db filename qs
 where
    qs = scanPackets filename ps

    scanPackets :: FilePath -> [Packet] -> [(Packet,Packet,(Packet,Map.Map FilePath Packet))]
    scanPackets filename [] = []
    scanPackets filename (p:ps) = scanl doit (doit (MarkerPacket,MarkerPacket,ret MarkerPacket) p) ps
     where
        ret p = (p,Map.empty)
        doit (top,sub,prev) p =
            case p of
                _ | isKey p && not (is_subkey p) -> (p,MarkerPacket,ret p)
                _ | isKey p && is_subkey p       -> (top,p,ret p)
                _ | isUserID p                   -> (top,p,ret p)
                _ | isTrust p                    -> (top,sub,updateTrust top sub prev p)
                _ | otherwise                    -> (top,sub,ret p)

        updateTrust top (PublicKeyPacket {}) (pre,t) p = (pre,Map.insert filename p t) -- public
        updateTrust (PublicKeyPacket {}) _   (pre,t) p = (pre,Map.insert filename p t) -- public
        updateTrust _                    _   (pre,t) p = (pre,Map.insert filename p t) -- secret




merge_ :: KeyDB -> FilePath -> [(Packet,Packet,(Packet,Map.Map FilePath Packet))]
                -> KeyDB
merge_ db filename qs = foldl mergeit db (zip [0..] qs)
 where
    keycomp (SecretKeyPacket {}) (PublicKeyPacket {}) = LT
    keycomp (PublicKeyPacket {}) (SecretKeyPacket {}) = GT
    keycomp a b | keykey a==keykey b = EQ
    keycomp a b = error $ unlines ["Unable to merge keys:"
                                  , fingerprint a
                                  , PP.ppShow a
                                  , fingerprint b
                                  , PP.ppShow b
                                  ]

    asMapped n p = let m = mappedPacket filename p
                   in m { locations = fmap (\x->x {originalNum=n}) (locations m) }
    asSigAndTrust n (p,tm) = (asMapped n p,tm)
    emptyUids = Map.empty
    -- mergeit db (_,_,TrustPacket {}) = db -- Filter TrustPackets
    mergeit :: KeyDB -> (Int,(Packet,Packet,(Packet,Map.Map FilePath Packet))) -> KeyDB
    mergeit db (n,(top,sub,ptt@(p,trustmap))) | isKey top = Map.alter update (keykey top) db
     where
        -- NOTE:
        --  if a keyring file has both a public key packet and a secret key packet
        --  for the same key, then only one of them will survive, which ever is 
        --  later in the file.
        -- 
        --  This is due to the use of statements like 
        --      (Map.insert filename (origin p n) (locations key))
        --
        update v | isKey p && not (is_subkey p)
          = case v of
             Nothing -> Just $ KeyData (asMapped n p) [] emptyUids Map.empty
             Just (KeyData key sigs uids subkeys) | keykey (packet key) == keykey p
                     -> Just $ KeyData ( (asMapped n (minimumBy keycomp [packet key,p]))
                                          { locations = Map.insert filename (origin p n) (locations key) } )
                                       sigs
                                       uids
                                       subkeys
             _       -> error . concat $ ["Unexpected master key merge error: "
                                         ,show (fingerprint top, fingerprint p)]
        update (Just (KeyData key sigs uids subkeys)) | isKey p && is_subkey p
          = Just $ KeyData key sigs uids (Map.alter (mergeSubkey n p) (keykey p) subkeys)
        update (Just (KeyData key sigs uids subkeys)) | isUserID p
          = Just $ KeyData key sigs (Map.alter (mergeUid n ptt) (uidkey p) uids)
                                    subkeys
        update (Just (KeyData key sigs uids subkeys))
          = case sub of
             MarkerPacket    -> Just $ KeyData key (mergeSig n ptt sigs) uids subkeys
             UserIDPacket {} -> Just $ KeyData key
                                               sigs
                                               (Map.alter (mergeUidSig n ptt) (uidkey sub) uids)
                                               subkeys
             _  | isKey sub  -> Just $ KeyData key
                                               sigs
                                               uids
                                               (Map.alter (mergeSubSig n ptt) (keykey sub) subkeys)
             _ -> error $ "Unexpected PGP packet 1: "++(words (show p) >>= take 1)
        update _ = error $ "Unexpected PGP packet 2: "++(words (show p) >>= take 1)

    mergeit _  (_,(_,_,p)) = error $ "Unexpected PGP packet 3: "++whatP p

    mergeSubkey :: Int -> Packet -> Maybe SubKey -> Maybe SubKey
    mergeSubkey n p Nothing                  = Just $ SubKey (asMapped n p) []
    mergeSubkey n p (Just (SubKey key sigs)) = Just $
        SubKey ((asMapped n (minimumBy subcomp [packet key,p]))
                 { locations = Map.insert filename (origin p n) (locations key) })
               sigs
     where
        -- Compare master keys, LT is prefered for merging
        -- Compare subkeys, LT is prefered for merging
        subcomp (SecretKeyPacket {}) (PublicKeyPacket {}) = LT
        subcomp (PublicKeyPacket {}) (SecretKeyPacket {}) = GT
        subcomp a b | keykey a==keykey b = EQ
        subcomp a b = error $ unlines ["Unable to merge subs:"
                                      , fingerprint a
                                      , PP.ppShow a
                                      , fingerprint b
                                      , PP.ppShow b
                                      ]
        subcomp_m a b = subcomp (packet a) (packet b)

    mergeUid :: Int ->(Packet,a) -> Maybe ([SigAndTrust],OriginMap) -> Maybe ([SigAndTrust],OriginMap)
    mergeUid n (UserIDPacket s,_) Nothing         = Just ([],Map.singleton filename (origin MarkerPacket n))
    mergeUid n (UserIDPacket s,_) (Just (sigs,m)) = Just (sigs, Map.insert filename (origin MarkerPacket n) m)
    mergeUid n p _ = error $ "Unable to merge into UID record: " ++whatP p

    whatP (a,_) = concat . take 1 . words . show $ a


    mergeSig :: Int -> (Packet,TrustMap) -> [SigAndTrust] -> [SigAndTrust]
    mergeSig n sig sigs =
      let (xs,ys) = break (isSameSig sig) sigs
      in if null ys
          then sigs++[first (asMapped n) sig]
          else let y:ys'=ys
               in xs ++ (mergeSameSig n sig y : ys')


    isSameSig (a,_) (MappedPacket {packet=b},_) | isSignaturePacket a && isSignaturePacket b =
        a { unhashed_subpackets=[] } == b { unhashed_subpackets = [] }
    isSameSig (a,_) (MappedPacket {packet=b},_) = a==b

    mergeSameSig :: Int -> (Packet,TrustMap) -> (MappedPacket,TrustMap) -> (MappedPacket, TrustMap)
    mergeSameSig n (a,ta) (m@(MappedPacket{packet=b,locations=locs}),tb) | isSignaturePacket a && isSignaturePacket b =
       ( m { packet = (b { unhashed_subpackets =
                            foldl mergeItem (unhashed_subpackets b) (unhashed_subpackets a) })
           , locations = Map.insert filename (origin a n) locs }
        , tb `Map.union` ta )

     where
        -- TODO: when merging items, we should delete invalidated origins
        -- from the orgin map.
        mergeItem ys x = if x `elem` ys then ys else ys++[x]

    mergeSameSig n a b = b -- trace ("discarding dup "++show a) b

    mergeUidSig n sig (Just (sigs,m)) = Just (mergeSig n sig sigs, m)
    mergeUidSig n sig Nothing     = Just ([asSigAndTrust n sig],Map.empty)

    mergeSubSig n sig (Just (SubKey key sigs)) = Just $ SubKey key (mergeSig n sig sigs)
    mergeSubSig n sig Nothing = error $
        "Unable to merge subkey signature: "++(words (show sig) >>= take 1)

unsig :: FilePath -> Bool -> SigAndTrust -> [MappedPacket]
unsig fname isPublic (sig,trustmap) = 
    [sig]++ map (asMapped (-1)) ( take 1 . Map.elems $ Map.filterWithKey f trustmap)
  where
    f n _ = n==fname -- && trace ("fname=n="++show n) True
    asMapped n p = let m = mappedPacket fname p
                   in m { locations = fmap (\x->x {originalNum=n}) (locations m) }

concatSort fname getp f = concat . sortByHint fname getp . map f

sortByHint fname f = sortBy (comparing gethint)
  where
    gethint = maybe defnum originalNum . Map.lookup fname . locations . f
    defnum = -1

flattenTop :: FilePath -> Bool -> KeyData -> [MappedPacket]
flattenTop fname ispub (KeyData key sigs uids subkeys) =
    unk ispub key : 
            ( flattenAllUids fname ispub uids
             ++ concatSort fname head (flattenSub fname ispub) (Map.elems subkeys))

flattenSub :: FilePath -> Bool -> SubKey -> [MappedPacket]
flattenSub fname ispub (SubKey key sigs) = unk ispub key: concatSort fname head (unsig fname ispub) sigs

unk :: Bool -> MappedPacket -> MappedPacket
unk isPublic = if isPublic then toPacket secretToPublic else id
                where toPacket f mp@(MappedPacket {packet=p}) = mp {packet=(f p)}

flattenAllUids :: FilePath -> Bool -> Map.Map String ([SigAndTrust],OriginMap) -> [MappedPacket]
flattenAllUids fname ispub uids =
    concatSort fname head (flattenUid fname ispub) (Map.assocs uids)

flattenUid :: FilePath -> Bool -> (String,([SigAndTrust],OriginMap)) -> [MappedPacket]
flattenUid fname ispub (str,(sigs,om)) = 
    (mappedPacket "" $ UserIDPacket str) {locations=om} : concatSort fname head (unsig fname ispub) sigs


 
{-
data Kiki a =
    SinglePass (KeyRingData -> KeyRingAction a)
    | forall b. MultiPass (KeyRingData -> KeyRingAction b)
                          (Kiki (b -> a))

fmapWithRT :: (KeyRingRuntime -> a -> b) -> Kiki a -> Kiki b
fmapWithRT g (SinglePass pass) = SinglePass pass'
 where
    pass' kd = case pass kd of
                KeyRingAction v -> RunTimeAction (\rt -> g rt v)
                RunTimeAction f -> RunTimeAction (\rt -> g rt (f rt))
fmapWithRT g (MultiPass pass0 k) = MultiPass pass0 k'
 where
    k' = fmapWithRT (\rt f -> g rt . f) k

instance Functor Kiki where fmap f k = fmapWithRT (const f) k

instance Monad Kiki where
    return x = SinglePass (const $ KeyRingAction x)
    
    k >>= f  = eval' $ fmapWithRT (\rt x -> eval rt (f x)) k
                where (.:) = (.) . (.)

eval :: KeyRingRuntime -> Kiki a -> KeyRingData -> a
eval rt (SinglePass f) kd =
    case f kd of KeyRingAction v -> v
                 RunTimeAction g -> g rt                       
eval rt (MultiPass p kk) kd = eval rt kk kd $ eval rt (SinglePass p) kd

eval' :: Kiki (KeyRingData -> a) -> Kiki a
eval' k@(SinglePass pass) = SinglePass pass'
 where
    pass' kd = case pass kd of
                KeyRingAction f -> KeyRingAction (f kd)
                RunTimeAction g -> RunTimeAction (\rt -> g rt kd)
eval' k@(MultiPass p kk) = MultiPass p kk'
 where
    kk' = fmap flip kk

-}



{-
fmapWithRT g (SinglePass d@(KeyRingData { kAction = KeyRingAction v}))
    = SinglePass $ d { kAction = RunTimeAction (\rt -> g rt v) }
fmapWithRT g (SinglePass d@(KeyRingData { kAction = RunTimeAction f}))
    = SinglePass $ d { kAction = RunTimeAction f' }
    where f' rt = g rt (f rt)
fmapWithRT g (MultiPass p kk) = MultiPass p (fmapWithRT g' kk)
    where g' rt h = g rt . h
-}


data Kiki a =
    SinglePass { passInfo :: KeyRingData
               , rtAction :: KeyRingAction a }
    | forall b.
       MultiPass { passInfo :: KeyRingData
                 , passAction :: KeyRingAction b
                 , nextPass :: Kiki (b -> a)
                 }



evalAction :: KeyRingRuntime -> KeyRingAction a -> a
evalAction rt (KeyRingAction v) = v
evalAction rt (RunTimeAction g) = g rt

instance Monad KeyRingAction where
    return x = KeyRingAction x
    m >>= g  = case m of
        KeyRingAction v -> g v
        RunTimeAction f -> RunTimeAction $ \rt -> evalAction rt (g $ f rt)

instance Functor KeyRingAction where
    fmap g (KeyRingAction v) = KeyRingAction $ g v
    fmap g (RunTimeAction f) = RunTimeAction $ \rt -> g (f rt)

{-
argOut :: (KeyRingAction (a -> b)) -> a -> KeyRingAction b
argOut = todo
argIn :: (a -> KeyRingAction b) -> KeyRingAction (a->b)
-}

{-
fmapWithRT :: (a -> KeyRingAction b) -> Kiki a -> Kiki b
fmapWithRT g k@(SinglePass {}) = k { rtAction = action }
 where
    action = rtAction k >>= g
fmapWithRT g (MultiPass p atn next) = MultiPass p atn next'
 where
    next' = fmapWithRT g' next {- next :: Kiki (x -> a) -}
    -- g' :: ( (x->a) -> KeyRingAction b)
    g' h = RunTimeAction $
            \rt x -> case g (h x) of
                        KeyRingAction v -> v
                        RunTimeAction f -> f rt
-}

fmapWithRT :: KeyRingAction (a -> b) -> Kiki a -> Kiki b
fmapWithRT g (SinglePass pass atn) = SinglePass pass atn'
 where
    atn' = g >>= flip fmap atn
fmapWithRT g (MultiPass p atn next) = MultiPass p atn next'
 where
    next' = fmapWithRT g' next
    g' = fmap (\gf h -> gf . h) g

instance Functor Kiki where
    fmap f k = fmapWithRT (return f) k

instance Monad Kiki where
    return x = SinglePass todo (return x)
    k >>= f  = kjoin $ fmap f k

kikiAction :: Kiki a -> KeyRingAction a
kikiAction (SinglePass _ atn) = atn
kikiAction (MultiPass _ atn next) = do
        x <- atn
        g <- kikiAction next
        return $ g x

kjoin :: Kiki (Kiki a) -> Kiki a
kjoin k = fmapWithRT eval' k
 where
    eval' :: KeyRingAction (Kiki a -> a)
    eval' = RunTimeAction (\rt -> evalAction rt . kikiAction )

    {-
    kjoin :: Kiki (Kiki a) -> Kiki a
    kjoin k = kjoin' (fmap kikiAction k)
     where
        ev rt (KeyRingAction v) = v
        ev rt (RunTimeAction g) = g rt

        kjoin' :: Kiki (KeyRingAction a) -> Kiki a
        kjoin' (SinglePass pass atn) = SinglePass pass $ join atn
        kjoin' (MultiPass pass atn next) = MultiPass pass atn next'
            where
                next' = todo
    -}


{-
instance Functor Kiki where
    fmap f (SinglePass pass atn)
        = SinglePass pass (fmap f atn)
    fmap f (MultiPass pass atn next)
        = MultiPass pass atn (next >>= g)
     where
        g = todo
-}

{-
data Kiki a = SinglePass (KeyRingData a)
              | forall b. MultiPass (KeyRingData b) (Kiki (b -> a))

instance Functor Kiki where
    fmap f (SinglePass d) = SinglePass $ case kAction d of
                                  KeyRingAction v -> d { kAction = KeyRingAction (f v) }
                                  RunTimeAction g -> d { kAction = RunTimeAction (f . g) }
    fmap f (MultiPass p k)= MultiPass p (fmap (f .) k)

eval :: KeyRingRuntime -> Kiki a -> a
eval rt (SinglePass (KeyRingData { kAction = KeyRingAction v})) = v
eval rt (SinglePass (KeyRingData { kAction = RunTimeAction f})) = f rt
eval rt (MultiPass p kk) = eval rt kk $ eval rt (SinglePass p)

fmapWithRT :: (KeyRingRuntime -> a -> b) -> Kiki a -> Kiki b
fmapWithRT g (SinglePass d@(KeyRingData { kAction = KeyRingAction v}))
    = SinglePass $ d { kAction = RunTimeAction (\rt -> g rt v) }
fmapWithRT g (SinglePass d@(KeyRingData { kAction = RunTimeAction f}))
    = SinglePass $ d { kAction = RunTimeAction f' }
    where f' rt = g rt (f rt)
fmapWithRT g (MultiPass p kk) = MultiPass p (fmapWithRT g' kk)
    where g' rt h = g rt . h

kjoin :: Kiki (Kiki a) -> Kiki a
kjoin k = fmapWithRT eval k

passCount :: Kiki a -> Int
passCount (MultiPass _ k) = 1 + passCount k
passCount (SinglePass {}) = 1

instance Monad Kiki where
    return x = SinglePass (kret x)
    k >>= f  = kjoin (fmap f k)
-}


-- Kiki a -> a -> Kiki b

atRuntime :: (KeyRingRuntime -> IO (a,KeyRingRuntime)) -> Kiki a
atRuntime = todo

goHome :: Maybe FilePath -> Kiki ()
goHome p = todo -- SinglePass $ (kret ()) { homeSpec = p }

syncRing :: InputFile -> Kiki ()
syncRing = todo

syncSubKey :: String -> FilePath -> String -> Kiki ()
syncSubKey usage path cmd = todo

syncWallet :: FilePath -> Kiki ()
syncWallet = todo

usePassphraseFD :: Int -> Kiki ()
usePassphraseFD = todo

importAll :: Kiki ()
importAll = todo

importAllAuthentic :: Kiki ()
importAllAuthentic = todo

signSelfAuthorized :: Kiki ()
signSelfAuthorized = todo

showIdentity :: Message -> String
showIdentity = todo

identities :: Kiki [Message]
identities = todo

currentIdentity :: Kiki Message
currentIdentity = todo

identityBySpec :: String -> Kiki Message
identityBySpec = todo

identityBySSHKey :: String -> Kiki Message
identityBySSHKey = todo

keyBySpec :: String -> Kiki Packet
keyBySpec = todo

walletInputFormat :: Packet -> String
walletInputFormat = todo