This file is indexed.

/usr/include/QtCrypto/qca_cert.h is in libqca2-dev 2.1.1-4+b2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   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
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
/*
 * qca_cert.h - Qt Cryptographic Architecture
 * Copyright (C) 2003-2007  Justin Karneges <justin@affinix.com>
 * Copyright (C) 2004-2006  Brad Hards <bradh@frogmouth.net>
 *
 * This library 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.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301  USA
 *
 */

/**
   \file qca_cert.h

   Header file for PGP key and X.509 certificate related classes

   \note You should not use this header directly from an
   application. You should just use <tt> \#include \<QtCrypto>
   </tt> instead.
*/

#ifndef QCA_CERT_H
#define QCA_CERT_H

#include <QDateTime>
#include "qca_core.h"
#include "qca_publickey.h"

namespace QCA {

class CertContext;
class CSRContext;
class CRLContext;
class Certificate;
class CRL;
class CertificateCollection;
class CertificateChain;


/**
   Certificate Request Format
*/
enum CertificateRequestFormat
{
	PKCS10, ///< standard PKCS#10 format
	SPKAC   ///< Signed Public Key and Challenge (Netscape) format
};

/**
   Known types of information stored in certificates

   This enumerator offers a convenient way to work with common types.
*/
enum CertificateInfoTypeKnown
{
	CommonName,             ///< The common name (eg person), id = "2.5.4.3"
	Email,                  ///< Email address, id = "GeneralName.rfc822Name"
	EmailLegacy,            ///< PKCS#9 Email field, id = "1.2.840.113549.1.9.1"
	Organization,           ///< An organisation (eg company), id = "2.5.4.10"
	OrganizationalUnit,     ///< An part of an organisation (eg a division or branch), id = "2.5.4.11"
	Locality,               ///< The locality (eg city, a shire, or part of a state), id = "2.5.4.7"
	IncorporationLocality,  ///< The locality of incorporation (EV certificates), id = "1.3.6.1.4.1.311.60.2.1.1"
	State,                  ///< The state within the country, id = "2.5.4.8"
	IncorporationState,     ///< The state of incorporation (EV certificates), id = "1.3.6.1.4.1.311.60.2.1.2"
	Country,                ///< The country, id = "2.5.4.6"
	IncorporationCountry,   ///< The country of incorporation (EV certificates), id = "1.3.6.1.4.1.311.60.2.1.3"
	URI,                    ///< Uniform Resource Identifier, id = "GeneralName.uniformResourceIdentifier"
	DNS,                    ///< DNS name, id = "GeneralName.dNSName"
	IPAddress,              ///< IP address, id = "GeneralName.iPAddress"
	XMPP                    ///< XMPP address (see http://www.ietf.org/rfc/rfc3920.txt), id = "1.3.6.1.5.5.7.8.5"
};

/**
   \class CertificateInfoType qca_cert.h QtCrypto

   Certificate information type

   This class represents a type of information being stored in
   a certificate.  It can be created either using a known type
   (from the Known enumerator) or an identifier string (usually
   an OID).  Types created either way are interchangeable.

   Types also have the notion of a Section.  Some types may
   reside in the Distinguished Name field of a certificate, and
   some types may reside in the Subject Alternative Name field.
   This class is capable of representing a type from either
   section.

   In the general case, applications will want to use the
   CertificateInfoTypeKnown enumerator types.  These are from RFC3280
   (http://www.ietf.org/rfc/rfc3280.txt) except where shown.

   The entries for IncorporationLocality, IncorporationState
   and IncorporationCountry are the same as Locality, State
   and Country respectively, except that the Extended
   Validation (EV) certificate guidelines (published by the
   %Certificate Authority / Browser Forum, see
   http://www.cabforum.org) distinguish between the place of
   where the company does business (which is the Locality /
   State / Country combination) and the jurisdiction where the
   company is legally incorporated (the IncorporationLocality
   / IncorporationState / IncorporationCountry combination).

   \sa Certificate::subjectInfo() and Certificate::issuerInfo()
   \sa CRL::issuerInfo()

   \ingroup UserAPI
*/
class QCA_EXPORT CertificateInfoType
{
public:
	/**
	   Section of the certificate that the information belongs in
	*/
	enum Section
	{
		DN,              ///< Distinguished name (the primary name)
		AlternativeName  ///< Alternative name
	};

	/**
	   Standard constructor
	*/
	CertificateInfoType();

	/**
	   Construct a new type

	   The section will be derived by \a known.

	   \param known the type as part of the CertificateInfoTypeKnown
	   enumerator
	*/
	CertificateInfoType(CertificateInfoTypeKnown known);

	/**
	   Construct a new type

	   \param id the type as an identifier string (OID or internal)
	   \param section the section this type belongs in

	   \sa id
	*/
	CertificateInfoType(const QString &id, Section section);

	/**
	   Standard copy constructor

	   \param from the certificate information to copy from
	*/
	CertificateInfoType(const CertificateInfoType &from);

	~CertificateInfoType();

	/**
	   Standard assignment operator

	   \param from the certificate information to assign from
	*/
	CertificateInfoType & operator=(const CertificateInfoType &from);

	/**
	   The section the type is part of
	*/
	Section section() const;

	/**
	   The type as part of the CertificateInfoTypeKnown enumerator

	   This function may return a value that does not exist in the
	   enumerator.  In that case, you may use id() to determine the
	   type.
	*/
	CertificateInfoTypeKnown known() const;

	/**
	   The type as an identifier string

	   For types that have OIDs, this function returns an OID in string
	   form.  For types that do not have OIDs, this function returns an
	   internal identifier string whose first character is not a digit
	   (this allows you to tell the difference between an OID and an
	   internal identifier).

	   It is hereby stated that General Names (of the X.509 Subject
	   Alternative Name) shall use the internal identifier format
	   "GeneralName.[rfc field name]".  For example, the rfc822Name
	   field would have the identifier "GeneralName.rfc822Name".

	   Applications should not store, use, or compare against internal
	   identifiers unless the identifiers are explicitly documented
	   (e.g. GeneralName).
	*/
	QString id() const;

	/**
	   Comparison operator

	   \param other the certificate information to compare with this
	   certificate information.
	*/
	bool operator<(const CertificateInfoType &other) const;

	/**
	   Comparison operator

	   \param other the certificate information to compare with this
	   certificate information.
	*/
	bool operator==(const CertificateInfoType &other) const;

	/**
	   Inequality operator

	   \param other the certificate information to compare with this
	   certificate information.
	*/
	inline bool operator!=(const CertificateInfoType &other) const
	{
		return !(*this == other);
	}

private:
	class Private;
	QSharedDataPointer<Private> d;
};

/**
   \class CertificateInfoPair qca_cert.h QtCrypto

   One entry in a certificate information list

   \ingroup UserAPI
*/
class QCA_EXPORT CertificateInfoPair
{
public:
	/**
	   Standard constructor
	*/
	CertificateInfoPair();

	/**
	   Construct a new pair

	   \param type the type of information stored in this pair
	   \param value the value of the information to be stored
	*/
	CertificateInfoPair(const CertificateInfoType &type, const QString &value);

	/**
	   Standard copy constructor

	   \param from the information pair to copy from
	*/
	CertificateInfoPair(const CertificateInfoPair &from);

	~CertificateInfoPair();

	/**
	   Standard assignment operator

	   \param from the information pair to assign from
	*/
	CertificateInfoPair & operator=(const CertificateInfoPair &from);

	/**
	   The type of information stored in the pair
	*/
	CertificateInfoType type() const;

	/**
	   The value of the information stored in the pair
	*/
	QString value() const;

	/**
	   Comparison operator

	   \param other the certificate information pair to compare with this
	   certificate information pair.
	*/
	bool operator==(const CertificateInfoPair &other) const;

	/**
	   Inequality operator

	   \param other the certificate information pair to compare with this
	   certificate information pair.
	*/
	inline bool operator!=(const CertificateInfoPair &other) const
	{
		return !(*this == other);
	}

private:
	class Private;
	QSharedDataPointer<Private> d;
};


/**
   Known types of certificate constraints

   This enumerator offers a convenient way to work with common types.
*/
enum ConstraintTypeKnown
{
	// KeyUsage
	DigitalSignature,    ///< %Certificate can be used to create digital signatures, id = "KeyUsage.digitalSignature"
	NonRepudiation,      ///< %Certificate can be used for non-repudiation, id = "KeyUsage.nonRepudiation"
	KeyEncipherment,     ///< %Certificate can be used for encrypting / decrypting keys, id = "KeyUsage.keyEncipherment"
	DataEncipherment,    ///< %Certificate can be used for encrypting / decrypting data, id = "KeyUsage.dataEncipherment"
	KeyAgreement,        ///< %Certificate can be used for key agreement, id = "KeyUsage.keyAgreement"
	KeyCertificateSign,  ///< %Certificate can be used for key certificate signing, id = "KeyUsage.keyCertSign"
	CRLSign,             ///< %Certificate can be used to sign %Certificate Revocation Lists, id = "KeyUsage.crlSign"
	EncipherOnly,        ///< %Certificate can only be used for encryption, id = "KeyUsage.encipherOnly"
	DecipherOnly,        ///< %Certificate can only be used for decryption, id = "KeyUsage.decipherOnly"

	// ExtKeyUsage
	ServerAuth,       ///< %Certificate can be used for server authentication (e.g. web server), id = "1.3.6.1.5.5.7.3.1". This is an extended usage constraint.
	ClientAuth,       ///< %Certificate can be used for client authentication (e.g. web browser), id = "1.3.6.1.5.5.7.3.2". This is an extended usage constraint.
	CodeSigning,      ///< %Certificate can be used to sign code, id = "1.3.6.1.5.5.7.3.3". This is an extended usage constraint.
	EmailProtection,  ///< %Certificate can be used to sign / encrypt email, id = "1.3.6.1.5.5.7.3.4". This is an extended usage constraint.
	IPSecEndSystem,   ///< %Certificate can be used to authenticate a endpoint in IPSEC, id = "1.3.6.1.5.5.7.3.5". This is an extended usage constraint.
	IPSecTunnel,      ///< %Certificate can be used to authenticate a tunnel in IPSEC, id = "1.3.6.1.5.5.7.3.6". This is an extended usage constraint.
	IPSecUser,        ///< %Certificate can be used to authenticate a user in IPSEC, id = "1.3.6.1.5.5.7.3.7". This is an extended usage constraint.
	TimeStamping,     ///< %Certificate can be used to create a "time stamp" signature, id = "1.3.6.1.5.5.7.3.8". This is an extended usage constraint.
	OCSPSigning       ///< %Certificate can be used to sign an Online %Certificate Status Protocol (OCSP) assertion, id = "1.3.6.1.5.5.7.3.9". This is an extended usage constraint.
};

/**
   \class ConstraintType qca_cert.h QtCrypto

   Certificate constraint

   X.509 certificates can be constrained in their application - that is, some
   certificates can only be used for certain purposes. This class is used to
   identify an approved purpose for a certificate.

   \note It is common for a certificate to have more than one purpose.

   \ingroup UserAPI
*/
class QCA_EXPORT ConstraintType
{
public:
	/**
	   Section of the certificate that the constraint belongs in
	*/
	enum Section
	{
		KeyUsage,          ///< Stored in the key usage section
		ExtendedKeyUsage   ///< Stored in the extended key usage section
	};

	/**
	   Standard constructor
	*/
	ConstraintType();

	/**
	   Construct a new constraint

	   The section will be derived by \a known.

	   \param known the type as part of the ConstraintTypeKnown
	   enumerator
	*/
	ConstraintType(ConstraintTypeKnown known);

	/**
	   Construct a new constraint

	   \param id the type as an identifier string (OID or internal)
	   \param section the section this type belongs in

	   \sa id
	*/
	ConstraintType(const QString &id, Section section);

	/**
	   Standard copy constructor

	   \param from the constraint type to copy from
	*/
	ConstraintType(const ConstraintType &from);

	~ConstraintType();

	/**
	   Standard assignment operator

	   \param from the constraint type to assign from
	*/
	ConstraintType & operator=(const ConstraintType &from);

	/**
	   The section the constraint is part of
	*/
	Section section() const;

	/**
	   The type as part of the ConstraintTypeKnown enumerator

	   This function may return a value that does not exist in the
	   enumerator.  In that case, you may use id() to determine the
	   type.
	*/
	ConstraintTypeKnown known() const;

	/**
	   The type as an identifier string

	   For types that have OIDs, this function returns an OID in string
	   form.  For types that do not have OIDs, this function returns an
	   internal identifier string whose first character is not a digit
	   (this allows you to tell the difference between an OID and an
	   internal identifier).

	   It is hereby stated that the KeyUsage bit fields shall use the
	   internal identifier format "KeyUsage.[rfc field name]".  For
	   example, the keyEncipherment field would have the identifier
	   "KeyUsage.keyEncipherment".

	   Applications should not store, use, or compare against internal
	   identifiers unless the identifiers are explicitly documented
	   (e.g. KeyUsage).
	*/
	QString id() const;

	/**
	   Comparison operator

	   \param other the constraint type to compare with this constraint
	*/
	bool operator<(const ConstraintType &other) const;

	/**
	   Comparison operator

	   \param other the constraint type to compare with this constraint
	*/
	bool operator==(const ConstraintType &other) const;

	/**
	   Inequality operator

	   \param other the constraint type to compare with this constraint
	*/
	inline bool operator!=(const ConstraintType &other) const
	{
		return !(*this == other);
	}

private:
	class Private;
	QSharedDataPointer<Private> d;
};

/**
   Specify the intended usage of a certificate
*/
enum UsageMode
{
	UsageAny             = 0x00, ///< Any application, or unspecified
	UsageTLSServer       = 0x01, ///< server side of a TLS or SSL connection
	UsageTLSClient       = 0x02, ///< client side of a TLS or SSL connection
	UsageCodeSigning     = 0x04, ///< code signing certificate
	UsageEmailProtection = 0x08, ///< email (S/MIME) certificate
	UsageTimeStamping    = 0x10, ///< time stamping certificate
	UsageCRLSigning      = 0x20  ///< certificate revocation list signing certificate
};

/**
   The validity (or otherwise) of a certificate
*/
enum Validity
{
	ValidityGood,            ///< The certificate is valid
	ErrorRejected,           ///< The root CA rejected the certificate purpose
	ErrorUntrusted,          ///< The certificate is not trusted
	ErrorSignatureFailed,    ///< The signature does not match
	ErrorInvalidCA,          ///< The Certificate Authority is invalid
	ErrorInvalidPurpose,     ///< The purpose does not match the intended usage
	ErrorSelfSigned,         ///< The certificate is self-signed, and is not found in the list of trusted certificates
	ErrorRevoked,            ///< The certificate has been revoked
	ErrorPathLengthExceeded, ///< The path length from the root CA to this certificate is too long
	ErrorExpired,            ///< The certificate has expired, or is not yet valid (e.g. current time is earlier than notBefore time)
	ErrorExpiredCA,          ///< The Certificate Authority has expired
	ErrorValidityUnknown = 64  ///< Validity is unknown
};

/**
   The conditions to validate for a certificate
*/
enum ValidateFlags
{
	ValidateAll     = 0x00,  // Verify all conditions
	ValidateRevoked = 0x01,  // Verify the certificate was not revoked
	ValidateExpired = 0x02,  // Verify the certificate has not expired
	ValidatePolicy  = 0x04   // Verify the certificate can be used for a specified purpose
};

/**
   Certificate properties type

   With this container, the information is not necessarily stored
   in the same sequence as the certificate format itself.  Use this
   container if the order the information is/was stored does not
   matter for you (this is the case with most applications).

   Additionally, the EmailLegacy type should not be used with this
   container.  Use Email instead.
*/
typedef QMultiMap<CertificateInfoType, QString> CertificateInfo;

/**
   \class CertificateInfoOrdered qca_cert.h QtCrypto

   Ordered certificate properties type

   This container stores the information in the same sequence as
   the certificate format itself.

   \ingroup UserAPI
*/
class CertificateInfoOrdered : public QList<CertificateInfoPair>
{
public:
	/**
	   Convert to RFC 1779 string format
	*/
	inline QString toString() const;

	/**
	   Return a new CertificateInfoOrdered that only contains
	   the Distinguished Name (DN) types found in this object.
	*/
	inline CertificateInfoOrdered dnOnly() const;
};

/**
   Convert to RFC 1779 string format

   \param in the certificate info to convert
*/
QCA_EXPORT QString orderedToDNString(const CertificateInfoOrdered &in);

/**
   Return a new CertificateInfoOrdered that only contains
   the Distinguished Name (DN) types found in the input object.

   \param in the certificate info to extract from
*/
QCA_EXPORT CertificateInfoOrdered orderedDNOnly(const CertificateInfoOrdered &in);

inline QString CertificateInfoOrdered::toString() const
{
	return orderedToDNString(*this);
}

inline CertificateInfoOrdered CertificateInfoOrdered::dnOnly() const
{
	return orderedDNOnly(*this);
}

/**
   %Certificate constraints type
*/
typedef QList<ConstraintType> Constraints;

/**
   Create a list of unique friendly names among a list of certificates

   \param list the list of certificates for which a friendly name is required.

*/
QCA_EXPORT QStringList makeFriendlyNames(const QList<Certificate> &list);

/**
   \class CertificateOptions qca_cert.h QtCrypto

   %Certificate options

   \note In SPKAC mode, all options are ignored except for challenge

   \ingroup UserAPI
*/
class QCA_EXPORT CertificateOptions
{
public:
	/**
	   Create a Certificate options set

	   \param format the format to create the certificate request in
	*/
	CertificateOptions(CertificateRequestFormat format = PKCS10);

	/**
	   Standard copy constructor

	   \param from the Certificate Options to copy into this object
	*/
	CertificateOptions(const CertificateOptions &from);
	~CertificateOptions();

	/**
	   Standard assignment operator

	   \param from the Certificate Options to copy into this object
	*/
	CertificateOptions & operator=(const CertificateOptions &from);

	/**
	   test the format type for this certificate
	*/
	CertificateRequestFormat format() const;

	/**
	   Specify the format for this certificate

	   \param f the format to use
	*/
	void setFormat(CertificateRequestFormat f);

	/**
	   Test if the certificate options object is valid

	   \return true if the certificate options object is valid
	*/
	bool isValid() const;

	/**
	   The challenge part of the certificate

	   For CertificateRequest only

	   \sa setChallenge
	*/
	QString challenge() const;

	/**
	   Information on the subject of the certificate

	   \sa setInfo
	*/
	CertificateInfo info() const;

	/**
	   Information on the subject of the certificate, in the
	   exact order the items will be written

	   \sa setInfoOrdered
	*/
	CertificateInfoOrdered infoOrdered() const;

	/**
	   List the constraints on this certificate
	*/
	Constraints constraints() const;

	/**
	   list the policies on this certificate
	*/
	QStringList policies() const;

	/**
	   list of URI locations for CRL files

	   each URI refers to the same CRL file

	   For Certificate creation only
	*/
	QStringList crlLocations() const;

	/**
	   list of URI locations for issuer certificate files

	   each URI refers to the same issuer file

	   For Certificate creation only
	*/
	QStringList issuerLocations() const;

	/**
	   list of URI locations for OCSP services

	   For Certificate creation only
	*/
	QStringList ocspLocations() const;

	/**
	   test if the certificate is a CA cert

	   \sa setAsCA
	   \sa setAsUser
	*/
	bool isCA() const;

	/**
	   return the path limit on this certificate
	*/
	int pathLimit() const;

	/**
	   The serial number for the certificate

	   For Certificate creation only
	*/
	BigInteger serialNumber() const;

	/**
	   the first time the certificate will be valid

	   For Certificate creation only
	*/
	QDateTime notValidBefore() const;

	/**
	   the last time the certificate is valid

	   For Certificate creation only
	*/
	QDateTime notValidAfter() const;

	/**
	   Specify the challenge associated with this
	   certificate

	   \param s the challenge string

	   \sa challenge()
	*/
	void setChallenge(const QString &s);

	/**
	   Specify information for the the subject associated with the
	   certificate

	   \param info the information for the subject

	   \sa info()
	*/
	void setInfo(const CertificateInfo &info);

	/**
	   Specify information for the the subject associated with the
	   certificate

	   \param info the information for the subject

	   \sa info()
	*/
	void setInfoOrdered(const CertificateInfoOrdered &info);

	/**
	   set the constraints on the certificate

	   \param constraints the constraints to be used for the certificate
	*/
	void setConstraints(const Constraints &constraints);

	/**
	   set the policies on the certificate

	   \param policies the policies to be used for the certificate
	*/
	void setPolicies(const QStringList &policies);

	/**
	   set the CRL locations of the certificate

	   each location refers to the same CRL.

	   \param locations a list of URIs to CRL files
	*/
	void setCRLLocations(const QStringList &locations);

	/**
	   set the issuer certificate locations of the certificate

	   each location refers to the same issuer file.

	   \param locations a list of URIs to issuer certificate files
	*/
	void setIssuerLocations(const QStringList &locations);

	/**
	   set the OCSP service locations of the certificate

	   \param locations a list of URIs to OCSP services
	*/
	void setOCSPLocations(const QStringList &locations);

	/**
	   set the certificate to be a CA cert

	   \param pathLimit the number of intermediate certificates allowable
	*/
	void setAsCA(int pathLimit = 8); // value from Botan

	/**
	   set the certificate to be a user cert (this is the default)
	*/
	void setAsUser();

	/**
	   Set the serial number property on this certificate

	   \param i the serial number to use
	*/
	void setSerialNumber(const BigInteger &i);

	/**
	   Set the validity period for the certificate

	   \param start the first time this certificate becomes valid
	   \param end the last time this certificate is valid
	*/
	void setValidityPeriod(const QDateTime &start, const QDateTime &end);

private:
	class Private;
	Private *d;
};

/**
   \class Certificate qca_cert.h QtCrypto

   Public Key (X.509) certificate

   This class contains one X.509 certificate

   \ingroup UserAPI
*/
class QCA_EXPORT Certificate : public Algorithm
{
public:
	/**
	   Create an empty Certificate
	*/
	Certificate();

	/**
	   Create a Certificate from a PEM encoded file

	   \param fileName the name (and path, if required)
	   of the file that contains the PEM encoded certificate
	*/
	Certificate(const QString &fileName);

	/**
	   Create a Certificate with specified options and a specified private
	   key

	   \param opts the options to use
	   \param key the private key for this certificate
	   \param provider the provider to use to create this key, if a
	   particular provider is required
	*/
	Certificate(const CertificateOptions &opts, const PrivateKey &key, const QString &provider = QString());

	/**
	   Standard copy constructor

	   \param from the certificate to copy from
	*/
	Certificate(const Certificate &from);

	~Certificate();

	/**
	   Standard assignment operator

	   \param from the Certificate to assign from
	*/
	Certificate & operator=(const Certificate &from);

	/**
	   Test if the certificate is empty (null)
	   \return true if the certificate is null
	*/
	bool isNull() const;

	/**
	   The earliest date that the certificate is valid
	*/
	QDateTime notValidBefore() const;

	/**
	   The latest date that the certificate is valid
	*/
	QDateTime notValidAfter() const;

	/**
	   Properties of the subject of the certificate, as a QMultiMap

	   This is the method that provides information on the
	   subject organisation, common name, DNS name, and so
	   on. The list of information types (i.e. the key to
	   the multi-map) is a CertificateInfoType. The values
	   are a list of QString.

	   An example of how you can iterate over the list is:
	   \code
foreach( QString dns, info.values(QCA::DNS) )
{
	std::cout << "    " << qPrintable(dns) << std::endl;
}
	   \endcode
	*/
	CertificateInfo subjectInfo() const;

	/**
	   Properties of the subject of the certificate, as 
	   an ordered list (QList of CertificateInfoPair).

	   This allows access to the certificate information 
	   in the same order as they appear in a certificate.
	   Each pair in the list has a type and a value.

	   For example:
	   \code
CertificateInfoOrdered info = cert.subjectInfoOrdered();
// info[0].type == CommonName
// info[0].value == "example.com"
	   \endcode

	   \sa subjectInfo for an unordered version
	   \sa issuerInfoOrdered for the ordered information on the issuer
	   \sa CertificateInfoPair for the elements in the list
	*/
	CertificateInfoOrdered subjectInfoOrdered() const;

	/**
	   Properties of the issuer of the certificate

	   \sa subjectInfo for how the return value works.
	*/
	CertificateInfo issuerInfo() const;

	/**
	   Properties of the issuer of the certificate, as 
	   an ordered list (QList of CertificateInfoPair).

	   This allows access to the certificate information 
	   in the same order as they appear in a certificate.
	   Each pair in the list has a type and a value.

	   \sa issuerInfo for an unordered version
	   \sa subjectInfoOrdered for the ordered information on the subject
	   \sa CertificateInfoPair for the elements in the list
	*/
	CertificateInfoOrdered issuerInfoOrdered() const;

	/**
	   The constraints that apply to this certificate
	*/
	Constraints constraints() const;

	/**
	   The policies that apply to this certificate

	   Policies are specified as strings containing OIDs
	*/
	QStringList policies() const;

	/**
	   List of URI locations for CRL files

	   Each URI refers to the same CRL file
	*/
	QStringList crlLocations() const;

	/**
	   List of URI locations for issuer certificate files

	   Each URI refers to the same issuer file
	*/
	QStringList issuerLocations() const;

	/**
	   List of URI locations for OCSP services
	*/
	QStringList ocspLocations() const;

	/**
	   The common name of the subject of the certificate

	   Common names are normally the name of a person, company or
	   organisation
	*/
	QString commonName() const;

	/**
	   The serial number of the certificate
	*/
	BigInteger serialNumber() const;

	/**
	   The public key associated with the subject of the certificate
	*/
	PublicKey subjectPublicKey() const;

	/**
	   Test if the Certificate is valid as a Certificate Authority

	   \return true if the Certificate is valid as a Certificate Authority
	*/
	bool isCA() const;

	/**
	   Test if the Certificate is self-signed

	   \return true if the certificate is self-signed
	*/
	bool isSelfSigned() const;

	/**
	   Test if the Certificate has signed another Certificate
	   object and is therefore the issuer

	   \param other the certificate to test

	   \return true if this certificate is the issuer of the argument
	*/
	bool isIssuerOf(const Certificate &other) const;

	/**
	   The upper bound of the number of links in the certificate
	   chain, if any
	*/
	int pathLimit() const;

	/**
	   The signature algorithm used for the signature on this certificate
	*/
	SignatureAlgorithm signatureAlgorithm() const;

	/**
	   The key identifier associated with the subject
	*/
	QByteArray subjectKeyId() const;

	/**
	   The key identifier associated with the issuer
	*/
	QByteArray issuerKeyId() const;

	/**
	   Check the validity of a certificate

	   \param trusted a collection of trusted certificates
	   \param untrusted a collection of additional certificates, not
	   necessarily trusted
	   \param u the use required for the certificate
	   \param vf the conditions to validate

	   \note This function may block
	*/
	Validity validate(const CertificateCollection &trusted, const CertificateCollection &untrusted, UsageMode u = UsageAny, ValidateFlags vf = ValidateAll) const;

	/**
	   Export the Certificate into a DER format
	*/
	QByteArray toDER() const;

	/**
	   Export the Certificate into a PEM format
	*/
	QString toPEM() const;

	/**
	   Export the Certificate into PEM format in a file

	   \param fileName the name of the file to use
	*/
	bool toPEMFile(const QString &fileName) const;

	/**
	   Import the certificate from DER

	   \param a the array containing the certificate in DER format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the Certificate corresponding to the certificate in the
	   provided array
	*/
	static Certificate fromDER(const QByteArray &a, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the certificate from PEM format

	   \param s the string containing the certificate in PEM format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the Certificate corresponding to the certificate in the
	   provided string
	*/
	static Certificate fromPEM(const QString &s, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the certificate from a file

	   \param fileName the name (and path, if required) of the file
	   containing the certificate in PEM format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the Certificate corresponding to the certificate in the
	   provided string
	*/
	static Certificate fromPEMFile(const QString &fileName, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Test if the subject of the certificate matches a specified host
	   name

	   This will return true (indicating a match), if the specified host
	   name meets the RFC 2818 validation rules with this certificate.

	   If the host is an internationalized domain name, then it must be
	   provided in unicode format, not in IDNA ACE/punycode format.

	   \param host the name of the host to compare to
	*/
	bool matchesHostName(const QString &host) const;

	/**
	   Test for equality of two certificates

	   \param a the certificate to compare this certificate with

	   \return true if the two certificates are the same
	*/
	bool operator==(const Certificate &a) const;

	/**
	   Inequality operator

	   \param other the certificate to compare this certificate with
	*/
	inline bool operator!=(const Certificate &other) const
	{
		return !(*this == other);
	}

	/**
	   \internal

	   \param c context (internal)
	*/
	void change(CertContext *c);

private:
	class Private;
	friend class Private;
	QSharedDataPointer<Private> d;

	friend class CertificateChain;
	Validity chain_validate(const CertificateChain &chain, const CertificateCollection &trusted, const QList<CRL> &untrusted_crls, UsageMode u, ValidateFlags vf) const;
	CertificateChain chain_complete(const CertificateChain &chain, const QList<Certificate> &issuers, Validity *result) const;
};

/**
   \class CertificateChain qca_cert.h QtCrypto

   A chain of related Certificates

   CertificateChain is a list (a QList) of certificates that are related by
   the signature from one to another. If Certificate C signs Certificate B,
   and Certificate B signs Certificate A, then C, B and A form a chain.

   The normal use of a CertificateChain is from a end-user Certificate (called
   the primary, equivalent to QList::first()) through some intermediate
   Certificates to some other Certificate (QList::last()), which might be a
   root Certificate Authority, but does not need to be.

   You can build up the chain using normal QList operations, such as
   QList::append().

   \sa QCA::CertificateCollection for an alternative way to represent a group
   of Certificates that do not necessarily have a chained relationship.

   \ingroup UserAPI
*/
class CertificateChain : public QList<Certificate>
{
public:
	/**
	   Create an empty certificate chain
	*/
	inline CertificateChain() {}

	/**
	   Create a certificate chain, starting at the specified certificate

	   \param primary the end-user certificate that forms one end of the
	   chain
	*/
	inline CertificateChain(const Certificate &primary) { append(primary); }

	/**
	   Return the primary (end-user) Certificate
	*/
	inline const Certificate & primary() const { return first(); }

	/**
	   Check the validity of a certificate chain

	   \param trusted a collection of trusted certificates
	   \param untrusted_crls a list of additional CRLs, not necessarily
	   trusted
	   \param u the use required for the primary certificate
	   \param vf the conditions to validate

	   \note This function may block

	   \sa Certificate::validate()
	*/
	inline Validity validate(const CertificateCollection &trusted, const QList<CRL> &untrusted_crls = QList<CRL>(), UsageMode u = UsageAny, ValidateFlags vf = ValidateAll) const;

	/**
	   Complete a certificate chain for the primary certificate, using the
	   rest of the certificates in the chain object, as well as those in
	   \a issuers, as possible issuers in the chain.  If there are issuers
	   missing, then the chain might be incomplete (at the worst case, if
	   no issuers exist for the primary certificate, then the resulting
	   chain will consist of just the primary certificate).  Use the
	   \a result argument to find out if there was a problem during
	   completion.  A result of ValidityGood means the chain was completed
	   successfully.

	   The newly constructed CertificateChain is returned.

	   If the certificate chain is empty, then this will return an empty
	   CertificateChain object.

	   \param issuers a pool of issuers to draw from as necessary
	   \param result the result of the completion operation

	   \note This function may block

	   \sa validate
	*/
	inline CertificateChain complete(const QList<Certificate> &issuers = QList<Certificate>(), Validity *result = 0) const;
};

inline Validity CertificateChain::validate(const CertificateCollection &trusted, const QList<CRL> &untrusted_crls, UsageMode u, ValidateFlags vf) const
{
	if(isEmpty())
		return ErrorValidityUnknown;
	return first().chain_validate(*this, trusted, untrusted_crls, u, vf);
}

inline CertificateChain CertificateChain::complete(const QList<Certificate> &issuers, Validity *result) const
{
	if(isEmpty())
		return CertificateChain();
	return first().chain_complete(*this, issuers, result);
}

/**
   \class CertificateRequest qca_cert.h QtCrypto

   %Certificate Request

   A CertificateRequest is a unsigned request for a Certificate

   \ingroup UserAPI
*/
class QCA_EXPORT CertificateRequest : public Algorithm
{
public:
	/**
	   Create an empty certificate request
	*/
	CertificateRequest();

	/**
	   Create a certificate request based on the contents of a file

	   \param fileName the file (and path, if necessary) containing a PEM
	   encoded certificate request
	*/
	CertificateRequest(const QString &fileName);

	/**
	   Create a certificate request based on specified options

	   \param opts the options to use in the certificate request
	   \param key the private key that matches the certificate being
	   requested
	   \param provider the provider to use, if a specific provider is
	   required
	*/
	CertificateRequest(const CertificateOptions &opts, const PrivateKey &key, const QString &provider = QString());

	/**
	   Standard copy constructor

	   \param from the request to copy from
	*/
	CertificateRequest(const CertificateRequest &from);

	~CertificateRequest();

	/**
	   Standard assignment operator

	   \param from the request to assign from
	*/
	CertificateRequest & operator=(const CertificateRequest &from);

	/**
	   test if the certificate request is empty

	   \return true if the certificate request is empty, otherwise false
	*/
	bool isNull() const;

	/**
	   Test if the certificate request can use a specified format

	   \param f the format to test for
	   \param provider the provider to use, if a specific provider is
	   required

	   \return true if the certificate request can use the specified
	   format
	*/
	static bool canUseFormat(CertificateRequestFormat f, const QString &provider = QString());

	/**
	   the format that this Certificate request is in
	*/
	CertificateRequestFormat format() const;

	/**
	   Information on the subject of the certificate being requested

	   \note this only applies to PKCS#10 format certificate requests

	   \sa subjectInfoOrdered for a version that maintains order
	   in the subject information.
	*/
	CertificateInfo subjectInfo() const;

	/**
	   Information on the subject of the certificate being requested, as 
	   an ordered list (QList of CertificateInfoPair).

	   \note this only applies to PKCS#10 format certificate requests

	   \sa subjectInfo for a version that does not maintain order, but
	   allows access based on a multimap.
	   \sa CertificateInfoPair for the elements in the list
	*/
	CertificateInfoOrdered subjectInfoOrdered() const;

	/**
	   The constraints that apply to this certificate request

	   \note this only applies to PKCS#10 format certificate requests
	*/
	Constraints constraints() const;

	/**
	   The policies that apply to this certificate request

	   \note this only applies to PKCS#10 format certificate requests
	*/
	QStringList policies() const;

	/**
	   The public key belonging to the issuer
	*/
	PublicKey subjectPublicKey() const;

	/**
	   Test if this Certificate Request is for a Certificate Authority
	   certificate

	   \note this only applies to PKCS#10 format certificate requests
	*/
	bool isCA() const;

	/**
	   The path limit for the certificate in this Certificate Request

	   \note this only applies to PKCS#10 format certificate requests
	*/
	int pathLimit() const;

	/**
	   The challenge associated with this certificate request
	*/
	QString challenge() const;

	/**
	   The algorithm used to make the signature on this certificate
	   request
	*/
	SignatureAlgorithm signatureAlgorithm() const;

	/**
	   Test for equality of two certificate requests

	   \param csr the certificate request to be compared to this certificate request

	   \return true if the two certificate requests are the same
	*/
	bool operator==(const CertificateRequest &csr) const;

	/**
	   Inequality operator

	   \param other the certificate request to be compared to this certificate request
	*/
	inline bool operator!=(const CertificateRequest &other) const
	{
		return !(*this == other);
	}

	/**
	   Export the Certificate Request into a DER format

	   \note this only applies to PKCS#10 format certificate requests
	*/
	QByteArray toDER() const;

	/**
	   Export the Certificate Request into a PEM format

	   \note this only applies to PKCS#10 format certificate requests
	*/
	QString toPEM() const;

	/**
	   Export the Certificate into PEM format in a file

	   \param fileName the name of the file to use

	   \note this only applies to PKCS#10 format certificate requests
	*/
	bool toPEMFile(const QString &fileName) const;

	/**
	   Import the certificate request from DER

	   \param a the array containing the certificate request in DER format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CertificateRequest corresponding to the certificate
	   request in the provided array

	   \note this only applies to PKCS#10 format certificate requests
	*/
	static CertificateRequest fromDER(const QByteArray &a, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the certificate request from PEM format

	   \param s the string containing the certificate request in PEM
	   format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CertificateRequest corresponding to the certificate
	   request in the provided string

	   \note this only applies to PKCS#10 format certificate requests
	*/
	static CertificateRequest fromPEM(const QString &s, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the certificate request from a file

	   \param fileName the name (and path, if required) of the file
	   containing the certificate request in PEM format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CertificateRequest corresponding to the certificate
	   request in the provided string

	   \note this only applies to PKCS#10 format certificate requests
	*/
	static CertificateRequest fromPEMFile(const QString &fileName, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Export the CertificateRequest to a string

	   \return the string corresponding to the certificate request

	   \note this only applies to SPKAC format certificate requests
	*/
	QString toString() const;

	/**
	   Import the CertificateRequest from a string

	   \param s the string containing to the certificate request
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CertificateRequest corresponding to the certificate
	   request in the provided string

	   \note this only applies to SPKAC format certificate requests
	*/
	static CertificateRequest fromString(const QString &s, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   \internal

	   \param c context (internal)
	*/
	void change(CSRContext *c);

private:
	class Private;
	friend class Private;
	QSharedDataPointer<Private> d;
};

/**
   \class CRLEntry qca_cert.h QtCrypto

   Part of a CRL representing a single certificate

   \ingroup UserAPI
*/
class QCA_EXPORT CRLEntry
{
public:
	/**
	   The reason why the certificate has been revoked
	*/
	enum Reason
	{
		Unspecified,        ///< reason is unknown
		KeyCompromise,      ///< private key has been compromised
		CACompromise,       ///< certificate authority has been compromised
		AffiliationChanged,
		Superseded,         ///< certificate has been superseded
		CessationOfOperation,
		CertificateHold,    ///< certificate is on hold
		RemoveFromCRL,      ///< certificate was previously in a CRL, but is now valid
		PrivilegeWithdrawn,
		AACompromise        ///< attribute authority has been compromised
	};

	/**
	   create an empty CRL entry
	*/
	CRLEntry();

	/**
	   create a CRL entry

	   \param c the certificate to revoke
	   \param r the reason that the certificate is being revoked
	*/
	explicit CRLEntry(const Certificate &c, Reason r = Unspecified);

	/**
	   create a CRL entry

	   \param serial the serial number of the Certificate being revoked
	   \param time the time the Certificate was revoked (or will be
	   revoked)
	   \param r the reason that the certificate is being revoked
	*/
	CRLEntry(const BigInteger serial, const QDateTime &time, Reason r = Unspecified);

	/**
	   Copy constructor

	   \param from the CRLEntry to copy from
	*/
	CRLEntry(const CRLEntry &from);

	~CRLEntry();

	/**
	   Standard assignment operator

	   \param from the CRLEntry to copy from
	*/
	CRLEntry & operator=(const CRLEntry &from);

	/**
	   The serial number of the certificate that is the subject of this CRL entry
	*/
	BigInteger serialNumber() const;

	/**
	   The time this CRL entry was created
	*/
	QDateTime time() const;

	/**
	   Test if this CRL entry is empty
	*/
	bool isNull() const;

	/**
	   The reason that this CRL entry was created

	   Alternatively, you might like to think of this as the reason that
	   the subject certificate has been revoked
	*/
	Reason reason() const;

	/**
	   Test if one CRL entry is "less than" another

	   CRL entries are compared based on their serial number

	   \param a the CRL entry to be compared to this CRL entry.
	*/
	bool operator<(const CRLEntry &a) const;

	/**
	   Test for equality of two CRL Entries

	   \param a the CRL entry to be compared to this CRL entry.

	   \return true if the two certificates are the same
	*/
	bool operator==(const CRLEntry &a) const;

	/**
	   Inequality operator

	   \param other the CRL entry to be compared to this CRL entry.
	*/
	inline bool operator!=(const CRLEntry &other) const
	{
		return !(*this == other);
	}

private:
	BigInteger _serial;
	QDateTime _time;
	Reason _reason;

	class Private;
	Private *d;
};

/**
   \class CRL qca_cert.h QtCrypto

   %Certificate Revocation List

   A %CRL is a list of certificates that are special in some
   way. The normal reason for including a certificate on a %CRL
   is that the certificate should no longer be used. For
   example, if a key is compromised, then the associated
   certificate may no longer provides appropriate
   security. There are other reasons why a certificate may be
   placed on a %CRL, as shown in the CRLEntry::Reason
   enumeration.

   \sa CertificateCollection for a way to handle Certificates
   and CRLs as a single entity.
   \sa CRLEntry for the %CRL segment representing a single Certificate.

   \ingroup UserAPI
*/
class QCA_EXPORT CRL : public Algorithm
{
public:
	CRL();

	/**
	   Standard copy constructor

	   \param from the revocation list to copy from
	*/
	CRL(const CRL &from);

	~CRL();

	/**
	   Standard assignment operator

	   \param from the revocation list to assign from
	*/
	CRL & operator=(const CRL &from);

	/**
	   Test if the CRL is empty

	   \return true if the CRL is entry, otherwise return false
	*/
	bool isNull() const;

	/**
	   Information on the issuer of the CRL as a QMultiMap.

	   \sa issuerInfoOrdered for a version that maintains the order
	   of information fields as per the underlying CRL.
	*/
	CertificateInfo issuerInfo() const;

	/**
	   Information on the issuer of the CRL as an ordered list
	   (QList of CertificateInfoPair).

	   \sa issuerInfo for a version that allows lookup based on
	   a multimap.
	   \sa CertificateInfoPair for the elements in the list
	*/
	CertificateInfoOrdered issuerInfoOrdered() const;

	/**
	   The CRL serial number. Note that serial numbers are a
	   CRL extension, and not all certificates have one.

	   \return the CRL serial number, or -1 if there is no serial number
	*/
	int number() const;

	/**
	   the time that this CRL became (or becomes) valid
	*/
	QDateTime thisUpdate() const;

	/**
	   the time that this CRL will be obsoleted 

	   you should obtain an updated CRL at this time
	*/
	QDateTime nextUpdate() const;

	/**
	    a list of the revoked certificates in this CRL
	*/
	QList<CRLEntry> revoked() const;

	/**
	   The signature algorithm used for the signature on this CRL
	*/
	SignatureAlgorithm signatureAlgorithm() const;

	/**
	   The key identification of the CRL issuer
	*/
	QByteArray issuerKeyId() const;

	/**
	   Test for equality of two %Certificate Revocation Lists

	   \param a the CRL to be compared to this CRL 

	   \return true if the two CRLs are the same
	*/
	bool operator==(const CRL &a) const;

	/**
	   Inequality operator

	   \param other the CRL to be compared to this CRL 
	*/
	inline bool operator!=(const CRL &other) const
	{
		return !(*this == other);
	}

	/**
	   Export the %Certificate Revocation List (CRL) in DER format

	   \return an array containing the CRL in DER format
	*/
	QByteArray toDER() const;

	/**
	   Export the %Certificate Revocation List (CRL) in PEM format

	   \return a string containing the CRL in PEM format
	*/
	QString toPEM() const;

	/**
	   Export the %Certificate Revocation List (CRL) into PEM format in a
	   file

	   \param fileName the name of the file to use
	*/
	bool toPEMFile(const QString &fileName) const;

	/**
	   Import a DER encoded %Certificate Revocation List (CRL)

	   \param a the array containing the CRL in DER format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CRL corresponding to the contents of the array
	*/
	static CRL fromDER(const QByteArray &a, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import a PEM encoded %Certificate Revocation List (CRL)

	   \param s the string containing the CRL in PEM format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CRL corresponding to the contents of the string
	*/
	static CRL fromPEM(const QString &s, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import a PEM encoded %Certificate Revocation List (CRL) from a file

	   \param fileName the name (and path, if required) of the file
	   containing the certificate in PEM format
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CRL in the file
	*/
	static CRL fromPEMFile(const QString &fileName, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   \internal

	   \param c context (internal)
	*/
	void change(CRLContext *c);

private:
	class Private;
	friend class Private;
	QSharedDataPointer<Private> d;
};

/**
   \class CertificateCollection qca_cert.h QtCrypto

   Bundle of Certificates and CRLs

   CertificateCollection provides a bundle of Certificates and Certificate
   Revocation Lists (CRLs), not necessarily related.

   \sa QCA::CertificateChain for a representation of a chain of Certificates
   related by signatures.

   \ingroup UserAPI
*/
class QCA_EXPORT CertificateCollection
{
public:
	/**
	   Create an empty Certificate / CRL collection
	*/
	CertificateCollection();

	/**
	   Standard copy constructor

	   \param from the CertificateCollection to copy from
	*/
	CertificateCollection(const CertificateCollection &from);

	~CertificateCollection();

	/**
	   Standard assignment operator

	   \param from the CertificateCollection to copy from
	*/
	CertificateCollection & operator=(const CertificateCollection &from);

	/**
	   Append a Certificate to this collection

	   \param cert the Certificate to add to this CertificateCollection
	*/
	void addCertificate(const Certificate &cert);

	/**
	   Append a CRL to this collection

	   \param crl the certificate revokation list to add to this
	   CertificateCollection
	*/
	void addCRL(const CRL &crl);

	/**
	   The Certificates in this collection
	*/
	QList<Certificate> certificates() const;

	/**
	   The CRLs in this collection
	*/
	QList<CRL> crls() const;

	/**
	   Add another CertificateCollection to this collection

	   \param other the CertificateCollection to add to this collection
	*/
	void append(const CertificateCollection &other);

	/**
	   Add another CertificateCollection to this collection

	   \param other the CertificateCollection to add to this collection
	*/
	CertificateCollection operator+(const CertificateCollection &other) const;

	/**
	   Add another CertificateCollection to this collection

	   \param other the CertificateCollection to add to this collection
	*/
	CertificateCollection & operator+=(const CertificateCollection &other);

	/**
	   test if the CertificateCollection can be imported and exported to
	   PKCS#7 format

	   \param provider the provider to use, if a specific provider is
	   required

	   \return true if the CertificateCollection can be imported and
	   exported to PKCS#7 format
	*/
	static bool canUsePKCS7(const QString &provider = QString());

	/**
	   export the CertificateCollection to a plain text file

	   \param fileName the name (and path, if required) to write the
	   contents of the CertificateCollection to

	   \return true if the export succeeded, otherwise false
	*/
	bool toFlatTextFile(const QString &fileName);

	/**
	   export the CertificateCollection to a PKCS#7 file

	   \param fileName the name (and path, if required) to write the
	   contents of the CertificateCollection to
	   \param provider the provider to use, if a specific provider is
	   required

	   \return true if the export succeeded, otherwise false
	*/
	bool toPKCS7File(const QString &fileName, const QString &provider = QString());

	/**
	   import a CertificateCollection from a text file

	   \param fileName the name (and path, if required) to read the
	   certificate collection from
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CertificateCollection corresponding to the contents of
	   the file specified in fileName
	*/
	static CertificateCollection fromFlatTextFile(const QString &fileName, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   import a CertificateCollection from a PKCS#7 file

	   \param fileName the name (and path, if required) to read the
	   certificate collection from
	   \param result a pointer to a ConvertResult, which if not-null will
	   be set to the conversion status
	   \param provider the provider to use, if a specific provider is
	   required

	   \return the CertificateCollection corresponding to the contents of
	   the file specified in fileName
	*/
	static CertificateCollection fromPKCS7File(const QString &fileName, ConvertResult *result = 0, const QString &provider = QString());

private:
	class Private;
	QSharedDataPointer<Private> d;
};

/**
   \class CertificateAuthority qca_cert.h QtCrypto

   A %Certificate Authority is used to generate Certificates and
   %Certificate Revocation Lists (CRLs).

   \ingroup UserAPI
*/
class QCA_EXPORT CertificateAuthority : public Algorithm
{
public:
	/**
	   Create a new %Certificate Authority

	   \param cert the CA certificate
	   \param key the private key associated with the CA certificate
	   \param provider the provider to use, if a specific provider is
	   required
	*/
	CertificateAuthority(const Certificate &cert, const PrivateKey &key, const QString &provider);

	/**
	   Copy constructor

	   \param from the CertificateAuthority to copy from
	*/
	CertificateAuthority(const CertificateAuthority &from);

	~CertificateAuthority();

	/**
	   Standard assignment operator

	   \param from the CertificateAuthority to copy from
	*/
	CertificateAuthority & operator=(const CertificateAuthority &from);

	/**
	   The Certificate belonging to the %CertificateAuthority

	   This is the Certificate that was passed as an argument to the
	   constructor
	*/
	Certificate certificate() const;

	/**
	   Create a new Certificate by signing the provider CertificateRequest

	   \param req the CertificateRequest to sign
	   \param notValidAfter the last date that the Certificate will be
	   valid
	*/
	Certificate signRequest(const CertificateRequest &req, const QDateTime &notValidAfter) const;

	/**
	   Create a new Certificate

	   \param key the Public Key to use to create the Certificate
	   \param opts the options to use for the new Certificate
	*/
	Certificate createCertificate(const PublicKey &key, const CertificateOptions &opts) const;

	/**
	   Create a new Certificate Revocation List (CRL)

	   \param nextUpdate the date that the CRL will be updated

	   \return an empty CRL
	*/
	CRL createCRL(const QDateTime &nextUpdate) const;

	/**
	   Update the CRL to include new entries

	   \param crl the CRL to update
	   \param entries the entries to add to the CRL
	   \param nextUpdate the date that this CRL will be updated

	   \return the update CRL
	*/
	CRL updateCRL(const CRL &crl, const QList<CRLEntry> &entries, const QDateTime &nextUpdate) const;

private:
	class Private;
	Private *d;
};

/**
   \class KeyBundle qca_cert.h QtCrypto

   Certificate chain and private key pair

   KeyBundle is essentially a convience class that holds a
   certificate chain and an associated private key. This class
   has a number of methods that make it particularly suitable
   for accessing a PKCS12 (.p12) format file, however it can
   be used as just a container for a Certificate, its
   associated PrivateKey and optionally additional
   X.509 Certificate that form a chain.

   For more information on PKCS12 "Personal Information
   Exchange Syntax Standard", see <a
   href="ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1.pdf">ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1.pdf</a>. 

   \ingroup UserAPI
*/
class QCA_EXPORT KeyBundle
{
public:
	/**
	   Create an empty KeyBundle
	*/
	KeyBundle();

	/**
	   Create a KeyBundle from a PKCS12 (.p12) encoded
	   file

	   This constructor requires appropriate plugin (provider)
	   support. You must check for the "pkcs12" feature
	   before using this constructor.

	   \param fileName the name of the file to read from
	   \param passphrase the passphrase that is applicable to the file

	   \sa fromFile for a more flexible version of the
	   same capability.

	   \note This synchronous operation may require event handling, and so
	   it must not be called from the same thread as an EventHandler.
	*/
	explicit KeyBundle(const QString &fileName, const SecureArray &passphrase = SecureArray());

	/**
	   Standard copy constructor

	   \param from the KeyBundle to use as source
	*/
	KeyBundle(const KeyBundle &from);

	~KeyBundle();

	/**
	   Standard assignment operator

	   \param from the KeyBundle to use as source
	*/
	KeyBundle & operator=(const KeyBundle &from);

	/**
	   Test if this key is empty (null)
	*/
	bool isNull() const;

	/**
	   The name associated with this key.

	   This is also known as the "friendly name", and if
	   present, is typically suitable to be displayed to
	   the user.

	   \sa setName
	*/
	QString name() const;

	/**
	   The public certificate part of this bundle

	   \sa setCertificateChainAndKey
	*/
	CertificateChain certificateChain() const;

	/**
	   The private key part of this bundle

	   \sa setCertificateChainAndKey
	*/
	PrivateKey privateKey() const;

	/**
	   Specify the name of this bundle

	   \param s the name to use
	*/
	void setName(const QString &s);

	/**
	   Set the public certificate and private key

	   \param c the CertificateChain containing the public part of the
	   Bundle
	   \param key the private key part of the Bundle

	   \sa privateKey, certificateChain for getters
	*/
	void setCertificateChainAndKey(const CertificateChain &c, const PrivateKey &key);

	/**
	   Export the key bundle to an array in PKCS12 format.

	   This method requires appropriate plugin (provider)
	   support - you must check for the "pkcs12" feature,
	   as shown below.

	   \code
if( QCA::isSupported("pkcs12") )
{
	// can use I/O
	byteArray = bundle.toArray( "pass phrase" );
}
else
{
	// not possible to use I/O
}
	   \endcode

	   \param passphrase the passphrase to use to protect the bundle
	   \param provider the provider to use, if a specific provider is
	   required
	*/
	QByteArray toArray(const SecureArray &passphrase, const QString &provider = QString()) const;

	/**
	   Export the key bundle to a file in PKCS12 (.p12) format

	   This method requires appropriate plugin (provider)
	   support - you must check for the "pkcs12" feature,
	   as shown below.

	   \code
if( QCA::isSupported("pkcs12") )
{
	// can use I/O
	bool result = bundle.toFile( filename, "pass phrase" );
}
else
{
	// not possible to use I/O
}
	   \endcode

	   \param fileName the name of the file to save to
	   \param passphrase the passphrase to use to protect the bundle
	   \param provider the provider to use, if a specific provider is
	   required
	*/
	bool toFile(const QString &fileName, const SecureArray &passphrase, const QString &provider = QString()) const;

	/**
	   Import the key bundle from an array in PKCS12 format

	   This method requires appropriate plugin (provider)
	   support - you must check for the "pkcs12" feature,
	   as shown below.

	   \code
if( QCA::isSupported("pkcs12") )
{
	// can use I/O
	bundle = QCA::KeyBundle::fromArray( array, "pass phrase" );
}
else
{
	// not possible to use I/O
}
	   \endcode

	   \param a the array to import from
	   \param passphrase the passphrase for the encoded bundle
	   \param result pointer to the result of the import process
	   \param provider the provider to use, if a specific provider is
	   required

	   \sa QCA::KeyLoader for an asynchronous loader approach.

	   \note This synchronous operation may require event handling, and so
	   it must not be called from the same thread as an EventHandler.
	*/
	static KeyBundle fromArray(const QByteArray &a, const SecureArray &passphrase = SecureArray(), ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the key bundle from a file in PKCS12 (.p12) format

	   This method requires appropriate plugin (provider)
	   support - you must check for the "pkcs12" feature,
	   as shown below.

	   \code
if( QCA::isSupported("pkcs12") )
{
	// can use I/O
	bundle = QCA::KeyBundle::fromFile( filename, "pass phrase" );
}
else
{
	// not possible to use I/O
}
	   \endcode

	   \param fileName the name of the file to read from
	   \param passphrase the passphrase for the encoded bundle
	   \param result pointer to the result of the import process
	   \param provider the provider to use, if a specific provider is
	   required

	   \sa QCA::KeyLoader for an asynchronous loader approach.

	   \note This synchronous operation may require event handling, and so
	   it must not be called from the same thread as an EventHandler.
	*/
	static KeyBundle fromFile(const QString &fileName, const SecureArray &passphrase = SecureArray(), ConvertResult *result = 0, const QString &provider = QString());

private:
	class Private;
	QSharedDataPointer<Private> d;
};

/**
   \class PGPKey qca_cert.h QtCrypto

   Pretty Good Privacy key 

   This holds either a reference to an item in a real PGP keyring,
   or a standalone item created using the from*() functions.

   Note that with the latter method, the key is of no use besides
   being informational.  The key must be in a keyring
   (that is, inKeyring() == true) to actually do crypto with it.

   \ingroup UserAPI
*/
class QCA_EXPORT PGPKey : public Algorithm
{
public:
	/**
	   Create an empty PGP key
	*/
	PGPKey();

	/**
	   Create a PGP key from an encoded file

	   \param fileName the name (and path, if required) of the file
	   that the PGP key is to be loaded from.

	   \sa fromFile for a version that allows better error checking / validation 
	   \sa toFile for a method to write out the key.
	*/
	PGPKey(const QString &fileName);

	/**
	   Standard copy constructor

	   \param from the PGPKey to use as the source
	*/
	PGPKey(const PGPKey &from);

	~PGPKey();

	/**
	   Standard assignment operator

	   \param from the PGPKey to use as the source
	*/
	PGPKey & operator=(const PGPKey &from);

	/**
	   Test if the PGP key is empty (null)

	   \return true if the PGP key is null
	*/
	bool isNull() const;

	/**
	   The Key identification for the PGP key
	*/
	QString keyId() const;

	/**
	   The primary user identification for the key
	*/
	QString primaryUserId() const;

	/**
	   The list of all user identifications associated with the key
	*/
	QStringList userIds() const;

	/**
	   Test if the PGP key is the secret key

	   \return true if the PGP key is the secret key
	*/
	bool isSecret() const;

	/**
	   The creation date for the key
	*/
	QDateTime creationDate() const;

	/**
	   The expiration date for the key
	*/
	QDateTime expirationDate() const;

	/**
	   The key fingerpint

	   This will return the PGP fingerprint as a string. It comprises 40
	   hex digits, without spaces.
	*/
	QString fingerprint() const;

	/**
	   Test if this key is in a keyring

	   \return true if the key is in a keyring

	   \note keys that are not in a keyring cannot be used for encryption,
	   decryption, signing or verification
	*/
	bool inKeyring() const;

	/**
	   Test if the key is trusted

	   \return true if the key is trusted
	*/
	bool isTrusted() const;

	/**
	   Export the key to an array.

	   This will export the key in a binary format (that is, not in an 
	   "ascii armoured" form).

	   \sa fromArray for a static import method.
	   \sa toString for an "ascii armoured" export method.
	*/
	QByteArray toArray() const;

	/**
	   Export the key to a string

	   This will export the key in an "ascii armoured" form.

	   \sa fromString for a static import method.
	   \sa toArray for a binary format export method.
	*/
	QString toString() const;

	/**
	   Export the key to a file

	   \param fileName the name of the file to save the key to
	*/
	bool toFile(const QString &fileName) const;

	/**
	   Import the key from an array

	   \param a the array to import from
	   \param result if not null, this will be set to the result of the
	   import process
	   \param provider the provider to use, if a particular provider is
	   required
	*/
	static PGPKey fromArray(const QByteArray &a, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the key from a string

	   \param s the string to import from
	   \param result if not null, this will be set to the result of the
	   import process
	   \param provider the provider to use, if a particular provider is
	   required
	*/
	static PGPKey fromString(const QString &s, ConvertResult *result = 0, const QString &provider = QString());

	/**
	   Import the key from a file

	   \param fileName string containing the name of the file to import
	   from
	   \param result if not null, this will be set to the result of the
	   import process
	   \param provider the provider to use, if a particular provider is
	   required
	*/
	static PGPKey fromFile(const QString &fileName, ConvertResult *result = 0, const QString &provider = QString());

private:
	class Private;
	Private *d;
};

/**
   \class KeyLoader qca_cert.h QtCrypto

   Asynchronous private key loader

   GUI applications generally must use KeyLoader to load private keys.  This
   is because the synchronous private key loading functions, for example
   QCA::PrivateKey::fromPEMFile(), cannot be used within the same thread as an
   EventHandler, and most GUI applications will use EventHandler from the main
   thread.  KeyLoader does not have this problem.  It can be used from any
   thread, including the same thread as EventHandler.

   The KeyLoader class allows you to asynchronously load stand-alone private
   keys (QCA::PrivateKey) or private keys with a certificate (QCA::KeyBundle)
   with a signal that advises of completion.

   To use this class to load a PrivateKey, you create a KeyLoader object then
   use one of the loadPrivateKeyFrom...() functions, depending on the format
   for your key. These functions return immediately.  When you get the
   finished() signal, you can check that the loading operation succeeded
   (using convertResult()) and then obtain the PrivateKey using the
   privateKey() function.

   The same process applies for loading a KeyBundle, except that you use
   either loadKeyBundleFromFile() or loadKeyBundleFromArray() instead of the
   loadPrivateKeyFrom...() function, and use keyBundle() instead of
   privateKey().

   The loader may need a passphrase to complete the loading of the key or key
   bundle.  You should use the QCA::EventHandler class to ensure that you deal
   with this correctly.

   \note %QCA also provides synchronous private key loading using
   QCA::PrivateKey::fromPEMFile(), QCA::PrivateKey::fromPEM() and
   QCA::PrivateKey::fromDER(). %QCA provides synchronous key bundle loading
   using QCA::KeyBundle::fromArray() and QCA::KeyBundle::fromFile().

   \ingroup UserAPI
*/
class QCA_EXPORT KeyLoader : public QObject
{
	Q_OBJECT
public:
	/**
	   Create a KeyLoader object.

	   \param parent the parent object for this object
	*/
	KeyLoader(QObject *parent = 0);
	~KeyLoader();

	/**
	   Initiate an asynchronous loading of a PrivateKey from a PEM format
	   file.

	   This function will return immediately.

	   \param fileName the name of the file (and path, if necessary) to
	   load the key from
	*/
	void loadPrivateKeyFromPEMFile(const QString &fileName);

	/**
	   Initiate an asynchronous loading of a PrivateKey from a PEM format
	   string.

	   This function will return immediately.

	   \param s the string containing the PEM formatted key
	*/
	void loadPrivateKeyFromPEM(const QString &s);

	/**
	   Initiate an asynchronous loading of a PrivateKey from a DER format
	   array.

	   This function will return immediately.

	   \param a the array containing the DER formatted key
	*/
	void loadPrivateKeyFromDER(const SecureArray &a);

	/**
	   Initiate an asynchronous loading of a KeyBundle from a file

	   This function will return immediately.

	   \param fileName the name of the file (and path, if necessary) to
	   load the key bundle from
	*/
	void loadKeyBundleFromFile(const QString &fileName);

	/**
	   Initiate an asynchronous loading of a KeyBundle from an array

	   This function will return immediately.

	   \param a the array containing the key bundle
	*/
	void loadKeyBundleFromArray(const QByteArray &a);

	/**
	   The result of the loading process.

	   This is not valid until the finished() signal has been emitted.
	*/
	ConvertResult convertResult() const;

	/**
	   The private key that has been loaded.

	   This is only valid if loadPrivateKeyFromPEMFile(),
	   loadPrivateKeyFromPEM() or loadPrivateKeyFromDER() has been used,
	   the load has completed (that is, finished() has been emitted), and
	   the conversion succeeded (that is, convertResult() returned
	   ConvertGood).
	*/
	PrivateKey privateKey() const;

	/**
	   The key bundle that has been loaded.

	   This is only valid if loadKeyBundleFromFile() or
	   loadKeyBundleFromArray() has been used, the load has completed
	   (that is, finished() has been emitted), and the conversion
	   succeeded (that is, convertResult() returned ConvertGood).
	*/
	KeyBundle keyBundle() const;

Q_SIGNALS:
	/**
	   Signal that is emitted when the load process has completed.

	   \note The load process may not have completed successfully - check
	   the result of convertResult() to confirm this before using the
	   privateKey() or keyBundle() results.
	*/
	void finished();

private:
	Q_DISABLE_COPY(KeyLoader)

	class Private;
	friend class Private;
	Private *d;
};

}

#endif