summaryrefslogtreecommitdiffstats
path: root/ipaserver/install/cainstance.py
blob: c26046c47ebc8141624929470b4f54798db84871 (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
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
# Authors: Rob Crittenden <rcritten@redhat.com>
#          Ade Lee <alee@redhat.com>
#          Andrew Wnuk <awnuk@redhat.com>
#
# Copyright (C) 2009  Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

import array
import base64
import binascii
import ConfigParser
import dbus
import httplib
import ldap
import os
import pwd
import re
import shutil
import stat
import subprocess
import sys
import syslog
import time
import tempfile
import urllib
import xml.dom.minidom

from ipalib import api
from ipalib import pkcs10, x509
from ipalib import errors

from ipaplatform import services
from ipaplatform.paths import paths
from ipaplatform.tasks import tasks

from ipapython import dogtag
from ipapython import certmonger
from ipapython import ipautil
from ipapython import ipaldap
from ipapython.certdb import get_ca_nickname
from ipapython.dn import DN
from ipapython.ipa_log_manager import log_mgr,\
    standard_logging_setup, root_logger

from ipaserver.install import certs
from ipaserver.install import dsinstance
from ipaserver.install import installutils
from ipaserver.install import service
from ipaserver.install.dogtaginstance import DogtagInstance
from ipaserver.install.dogtaginstance import PKI_USER, DEFAULT_DSPORT
from ipaserver.plugins import ldap2


# When IPA is installed with DNS support, this CNAME should hold all IPA
# replicas with CA configured
IPA_CA_RECORD = "ipa-ca"

# We need to reset the template because the CA uses the regular boot
# information
INF_TEMPLATE = """
[General]
FullMachineName=   $FQDN
SuiteSpotUserID=   $USER
SuiteSpotGroup=    $GROUP
ServerRoot=    $SERVER_ROOT
[slapd]
ServerPort=   $DSPORT
ServerIdentifier=   $SERVERID
Suffix=   $SUFFIX
RootDN=   cn=Directory Manager
RootDNPwd= $PASSWORD
ConfigFile = /usr/share/pki/ca/conf/database.ldif
"""


def get_preop_pin(instance_root, instance_name):
    # Only used for Dogtag 9
    preop_pin = None

    filename = instance_root + "/" + instance_name + "/conf/CS.cfg"

    # read the config file and get the preop pin
    try:
        f = open(filename)
    except IOError, e:
        root_logger.error("Cannot open configuration file." + str(e))
        raise e
    data = f.read()
    data = data.split('\n')
    pattern = re.compile("preop.pin=(.*)")
    for line in data:
        match = re.search(pattern, line)
        if match:
            preop_pin = match.group(1)
            break

    if preop_pin is None:
        raise RuntimeError(
            "Unable to find preop.pin in %s. Is your CA already configured?" %
            filename)

    return preop_pin


def import_pkcs12(input_file, input_passwd, cert_database,
                  cert_passwd):
    ipautil.run([paths.PK12UTIL, "-d", cert_database,
                 "-i", input_file,
                 "-k", cert_passwd,
                 "-w", input_passwd])


def get_value(s):
    """
    Parse out a name/value pair from a Javascript variable.
    """
    try:
        expr = s.split('=', 1)
        value = expr[1]
        value = value.replace('\"', '')
        value = value.replace(';', '')
        value = value.replace('\\n', '\n')
        value = value.replace('\\r', '\r')
        return value
    except IndexError:
        return None


def find_substring(data, value):
    """
    Scan through a list looking for a string that starts with value.
    """
    for d in data:
        if d.startswith(value):
            return get_value(d)


def get_defList(data):
    """
    Return a dictionary of defList name/value pairs.

    A certificate signing request is specified as a series of these.
    """
    varname = None
    value = None
    skip = False
    defdict = {}
    for d in data:
        if d.startswith("defList = new Object"):
            varname = None
            value = None
            skip = False
        if d.startswith("defList.defId"):
            varname = get_value(d)
        if d.startswith("defList.defVal"):
            value = get_value(d)
            if skip:
                varname = None
                value = None
                skip = False
        if d.startswith("defList.defConstraint"):
            ctype = get_value(d)
            if ctype == "readonly":
                skip = True

        if varname and value:
            defdict[varname] = value
            varname = None
            value = None

    return defdict


def get_outputList(data):
    """
    Return a dictionary of outputList name/value pairs.

    The output from issuing a certificate is a series of these.
    """
    varname = None
    value = None
    outputdict = {}
    for d in data:
        if d.startswith("outputList = new"):
            varname = None
            value = None
        if d.startswith("outputList.outputId"):
            varname = get_value(d)
        if d.startswith("outputList.outputVal"):
            value = get_value(d)

        if varname and value:
            outputdict[varname] = value
            varname = None
            value = None

    return outputdict


def get_crl_files(path=None):
    """
    Traverse dogtag's CRL files in default CRL publish directory or in chosen
    target directory.

    @param path Custom target directory
    """
    if path is None:
        path = dogtag.configured_constants().CRL_PUBLISH_PATH

    files = os.listdir(path)
    for f in files:
        if f == "MasterCRL.bin":
            yield os.path.join(path, f)
        elif f.endswith(".der"):
            yield os.path.join(path, f)


def is_step_one_done():
    """Read CS.cfg and determine if step one of an external CA install is done
    """
    path = dogtag.install_constants.CS_CFG_PATH
    if not os.path.exists(path):
        return False
    test = installutils.get_directive(path, 'preop.ca.type', '=')
    if test == "otherca":
        return True
    return False


def is_ca_installed_locally():
    """Check if CA is installed locally by checking for existence of CS.cfg
    :return:True/False
    """
    path = dogtag.install_constants.CS_CFG_PATH
    return os.path.exists(path)


def create_ca_user():
    """Create PKI user/group if it doesn't exist yet."""
    installutils.create_system_user(
        name=PKI_USER,
        group=PKI_USER,
        homedir=paths.VAR_LIB,
        shell=paths.NOLOGIN,
    )


class CADSInstance(service.Service):
    """Certificate Authority DS instance

    The CA DS was used with Dogtag 9. Only upgraded installations still use it.
    Thus this class only does uninstallation.
    """
    def __init__(self, host_name=None, realm_name=None, domain_name=None, dm_password=None, dogtag_constants=None):
        service.Service.__init__(
            self, "pkids",
            service_desc="directory server for the CA",
            dm_password=dm_password,
            ldapi=False,
            autobind=ipaldap.AUTOBIND_DISABLED)

        self.serverid = "PKI-IPA"
        self.realm = realm_name
        self.sub_dict = None
        self.domain = domain_name
        self.fqdn = host_name
        self.dercert = None
        self.pkcs12_info = None
        self.ds_port = None
        self.master_host = None
        self.nickname = 'Server-Cert'
        self.subject_base = None

    def uninstall(self):
        if self.is_configured():
            self.print_msg("Unconfiguring CA directory server")

        enabled = self.restore_state("enabled")
        serverid = self.restore_state("serverid")

        # Just eat this state if it exists
        self.restore_state("running")

        if not enabled is None and not enabled:
            services.knownservices.dirsrv.disable()

        if not serverid is None:
            # drop the trailing / off the config_dirname so the directory
            # will match what is in certmonger
            dirname = dsinstance.config_dirname(serverid)[:-1]
            dsdb = certs.CertDB(self.realm, nssdir=dirname)
            dsdb.untrack_server_cert("Server-Cert")
            dsinstance.erase_ds_instance_data(serverid)

        self.restore_state("user_exists")

        # At one time we removed this user on uninstall. That can potentially
        # orphan files, or worse, if another useradd runs in the interim,
        # cause files to have a new owner.


class CAInstance(DogtagInstance):
    """
    When using a dogtag CA the DS database contains just the
    server cert for DS. The mod_nss database will contain the RA agent
    cert that will be used to do authenticated requests against dogtag.

    This is done because we use python-nss and will inherit the opened
    NSS database in mod_python. In nsslib.py we do an nssinit but this will
    return success if the database is already initialized. It doesn't care
    if the database is different or not.

    external is a state machine:
       0 = not an externally signed CA
       1 = generating CSR to be signed
       2 = have signed cert, continue installation
    """

    def __init__(self, realm=None, ra_db=None, dogtag_constants=None,
                 host_name=None, dm_password=None, ldapi=True):
        if dogtag_constants is None:
            dogtag_constants = dogtag.configured_constants()

        super(CAInstance, self).__init__(
            realm=realm,
            subsystem="CA",
            service_desc="certificate server",
            dogtag_constants=dogtag_constants,
            host_name=host_name,
            dm_password=dm_password,
            ldapi=ldapi
        )

        # for external CAs
        self.external = 0
        self.csr_file = None
        self.cert_file = None
        self.cert_chain_file = None
        self.create_ra_agent_db = True

        self.canickname = get_ca_nickname(realm)
        self.ra_agent_db = ra_db
        self.ra_agent_pwd = self.ra_agent_db + "/pwdfile.txt"
        self.ra_cert = None
        self.requestId = None
        self.tracking_reqs = (('Server-Cert cert-pki-ca', None),
                              ('auditSigningCert cert-pki-ca', None),
                              ('ocspSigningCert cert-pki-ca', None),
                              ('subsystemCert cert-pki-ca', None),
                              ('caSigningCert cert-pki-ca', 'ipaCACertRenewal'))
        self.log = log_mgr.get_logger(self)

    def configure_instance(self, host_name, domain, dm_password,
                           admin_password, ds_port=DEFAULT_DSPORT,
                           pkcs12_info=None, master_host=None, csr_file=None,
                           cert_file=None, cert_chain_file=None,
                           master_replication_port=None,
                           subject_base=None, ca_signing_algorithm=None):
        """Create a CA instance.

           For Dogtag 9, this may involve creating the pki-ca instance.

           To create a clone, pass in pkcs12_info.

           Creating a CA with an external signer is a 2-step process. In
           step 1 we generate a CSR. In step 2 we are given the cert and
           chain and actually proceed to create the CA. For step 1 set
           csr_file. For step 2 set cert_file and cert_chain_file.
        """
        self.fqdn = host_name
        self.domain = domain
        self.dm_password = dm_password
        self.admin_password = admin_password
        self.ds_port = ds_port
        self.pkcs12_info = pkcs12_info
        if self.pkcs12_info is not None:
            self.clone = True
        self.master_host = master_host
        self.master_replication_port = master_replication_port
        if subject_base is None:
            self.subject_base = DN(('O', self.realm))
        else:
            self.subject_base = subject_base
        if ca_signing_algorithm is None:
            self.ca_signing_algorithm = 'SHA256withRSA'
        else:
            self.ca_signing_algorithm = ca_signing_algorithm

        # Determine if we are installing as an externally-signed CA and
        # what stage we're in.
        if csr_file is not None:
            self.csr_file = csr_file
            self.external = 1
        elif cert_file is not None:
            self.cert_file = cert_file
            self.cert_chain_file = cert_chain_file
            self.external = 2

        self.step("creating certificate server user", create_ca_user)
        if self.dogtag_constants.DOGTAG_VERSION >= 10:
            self.step("configuring certificate server instance", self.__spawn_instance)
        else:
            if not ipautil.dir_exists(paths.VAR_LIB_PKI_CA_DIR):
                self.step("creating pki-ca instance", self.create_instance)
            self.step("configuring certificate server instance", self.__configure_instance)
        self.step("stopping certificate server instance to update CS.cfg", self.stop_instance)
        self.step("backing up CS.cfg", self.backup_config)
        self.step("disabling nonces", self.__disable_nonce)
        self.step("set up CRL publishing", self.__enable_crl_publish)
        self.step("enable PKIX certificate path discovery and validation", self.enable_pkix)
        self.step("starting certificate server instance", self.start_instance)
        # Step 1 of external is getting a CSR so we don't need to do these
        # steps until we get a cert back from the external CA.
        if self.external != 1:
            if self.dogtag_constants.DOGTAG_VERSION < 10 and not self.clone:
                self.step("creating CA agent PKCS#12 file in /root", self.__create_ca_agent_pkcs12)
            if self.create_ra_agent_db:
                self.step("creating RA agent certificate database", self.__create_ra_agent_db)
            self.step("importing CA chain to RA certificate database", self.__import_ca_chain)
            self.step("fixing RA database permissions", self.fix_ra_perms)
            self.step("setting up signing cert profile", self.__setup_sign_profile)
            self.step("set certificate subject base", self.__set_subject_in_config)
            self.step("enabling Subject Key Identifier", self.enable_subject_key_identifier)
            self.step("enabling Subject Alternative Name", self.enable_subject_alternative_name)
            self.step("enabling CRL and OCSP extensions for certificates", self.__set_crl_ocsp_extensions)
            self.step("setting audit signing renewal to 2 years", self.set_audit_renewal)
            self.step("configuring certificate server to start on boot",
                      self.enable)
            if not self.clone:
                self.step("restarting certificate server", self.restart_instance)
                self.step("requesting RA certificate from CA", self.__request_ra_certificate)
                self.step("issuing RA agent certificate", self.__issue_ra_cert)
                self.step("adding RA agent as a trusted user", self.__configure_ra)
            self.step("configure certmonger for renewals", self.configure_certmonger_renewal)
            self.step("configure certificate renewals", self.configure_cert_renewal)
            if not self.clone:
                self.step("configure RA certificate renewal", self.configure_agent_renewal)
            self.step("configure Server-Cert certificate renewal", self.track_servercert)
            self.step("Configure HTTP to proxy connections",
                      self.http_proxy)

        self.start_creation(runtime=210)

    def __spawn_instance(self):
        """
        Create and configure a new CA instance using pkispawn.
        Creates the config file with IPA specific parameters
        and passes it to the base class to call pkispawn
        """

        # Create an empty and secured file
        (cfg_fd, cfg_file) = tempfile.mkstemp()
        os.close(cfg_fd)
        pent = pwd.getpwnam(PKI_USER)
        os.chown(cfg_file, pent.pw_uid, pent.pw_gid)

        # Create CA configuration
        config = ConfigParser.ConfigParser()
        config.optionxform = str
        config.add_section("CA")

        # Server
        config.set("CA", "pki_security_domain_name", self.security_domain_name)
        config.set("CA", "pki_enable_proxy", "True")
        config.set("CA", "pki_restart_configured_instance", "False")
        config.set("CA", "pki_backup_keys", "True")
        config.set("CA", "pki_backup_password", self.admin_password)

        # Client security database
        config.set("CA", "pki_client_database_dir", self.agent_db)
        config.set("CA", "pki_client_database_password", self.admin_password)
        config.set("CA", "pki_client_database_purge", "False")
        config.set("CA", "pki_client_pkcs12_password", self.admin_password)

        # Administrator
        config.set("CA", "pki_admin_name", "admin")
        config.set("CA", "pki_admin_uid", "admin")
        config.set("CA", "pki_admin_email", "root@localhost")
        config.set("CA", "pki_admin_password", self.admin_password)
        config.set("CA", "pki_admin_nickname", "ipa-ca-agent")
        config.set("CA", "pki_admin_subject_dn",
            str(DN(('cn', 'ipa-ca-agent'), self.subject_base)))
        config.set("CA", "pki_client_admin_cert_p12", paths.DOGTAG_AGENT_P12)

        # Directory server
        config.set("CA", "pki_ds_ldap_port", str(self.ds_port))
        config.set("CA", "pki_ds_password", self.dm_password)
        config.set("CA", "pki_ds_base_dn", self.basedn)
        config.set("CA", "pki_ds_database", "ipaca")

        # Certificate subject DN's
        config.set("CA", "pki_subsystem_subject_dn",
            str(DN(('cn', 'CA Subsystem'), self.subject_base)))
        config.set("CA", "pki_ocsp_signing_subject_dn",
            str(DN(('cn', 'OCSP Subsystem'), self.subject_base)))
        config.set("CA", "pki_ssl_server_subject_dn",
            str(DN(('cn', self.fqdn), self.subject_base)))
        config.set("CA", "pki_audit_signing_subject_dn",
            str(DN(('cn', 'CA Audit'), self.subject_base)))
        config.set("CA", "pki_ca_signing_subject_dn",
            str(DN(('cn', 'Certificate Authority'), self.subject_base)))

        # Certificate nicknames
        config.set("CA", "pki_subsystem_nickname", "subsystemCert cert-pki-ca")
        config.set("CA", "pki_ocsp_signing_nickname", "ocspSigningCert cert-pki-ca")
        config.set("CA", "pki_ssl_server_nickname", "Server-Cert cert-pki-ca")
        config.set("CA", "pki_audit_signing_nickname", "auditSigningCert cert-pki-ca")
        config.set("CA", "pki_ca_signing_nickname", "caSigningCert cert-pki-ca")

        # CA key algorithm
        config.set("CA", "pki_ca_signing_key_algorithm", self.ca_signing_algorithm)

        if self.clone:
            cafile = self.pkcs12_info[0]
            shutil.copy(cafile, paths.TMP_CA_P12)
            pent = pwd.getpwnam(PKI_USER)
            os.chown(paths.TMP_CA_P12, pent.pw_uid, pent.pw_gid)

            # Security domain registration
            config.set("CA", "pki_security_domain_hostname", self.master_host)
            config.set("CA", "pki_security_domain_https_port", "443")
            config.set("CA", "pki_security_domain_user", "admin")
            config.set("CA", "pki_security_domain_password", self.admin_password)

            # Clone
            config.set("CA", "pki_clone", "True")
            config.set("CA", "pki_clone_pkcs12_path", paths.TMP_CA_P12)
            config.set("CA", "pki_clone_pkcs12_password", self.dm_password)
            config.set("CA", "pki_clone_replication_security", "TLS")
            config.set("CA", "pki_clone_replication_master_port", str(self.master_replication_port))
            config.set("CA", "pki_clone_replication_clone_port", dogtag.install_constants.DS_PORT)
            config.set("CA", "pki_clone_replicate_schema", "False")
            config.set("CA", "pki_clone_uri", "https://%s" % ipautil.format_netloc(self.master_host, 443))

        # External CA
        if self.external == 1:
            config.set("CA", "pki_external", "True")
            config.set("CA", "pki_external_csr_path", self.csr_file)

        elif self.external == 2:
            cert = x509.load_certificate_from_file(self.cert_file)
            cert_file = tempfile.NamedTemporaryFile()
            x509.write_certificate(cert.der_data, cert_file.name)
            cert_file.flush()

            cert_chain, stderr, rc = ipautil.run(
                [paths.OPENSSL, 'crl2pkcs7',
                 '-certfile', self.cert_chain_file,
                 '-nocrl'])
            # Dogtag chokes on the header and footer, remove them
            # https://bugzilla.redhat.com/show_bug.cgi?id=1127838
            cert_chain = re.search(
                r'(?<=-----BEGIN PKCS7-----).*?(?=-----END PKCS7-----)',
                cert_chain, re.DOTALL).group(0)
            cert_chain_file = ipautil.write_tmp_file(cert_chain)

            config.set("CA", "pki_external", "True")
            config.set("CA", "pki_external_ca_cert_path", cert_file.name)
            config.set("CA", "pki_external_ca_cert_chain_path", cert_chain_file.name)
            config.set("CA", "pki_external_step_two", "True")

        # Generate configuration file
        with open(cfg_file, "wb") as f:
            config.write(f)

        self.backup_state('installed', True)
        try:
            DogtagInstance.spawn_instance(self, cfg_file)
        finally:
            os.remove(cfg_file)

        if self.external == 1:
            print "The next step is to get %s signed by your CA and re-run %s as:" % (self.csr_file, sys.argv[0])
            print "%s --external_cert_file=/path/to/signed_certificate --external_ca_file=/path/to/external_ca_certificate" % sys.argv[0]
            sys.exit(0)
        else:
            shutil.move(paths.CA_BACKUP_KEYS_P12,
                        paths.CACERT_P12)

        self.log.debug("completed creating ca instance")

    def create_instance(self):
        """
        If for some reason the instance doesn't exist, create a new one."
        """
        # Only used for Dogtag 9

        args = [paths.PKICREATE,
                '-pki_instance_root', paths.VAR_LIB,
                '-pki_instance_name',
                        self.dogtag_constants.PKI_INSTANCE_NAME,
                '-subsystem_type', 'ca',
                '-agent_secure_port',
                        str(self.dogtag_constants.AGENT_SECURE_PORT),
                '-ee_secure_port',
                        str(self.dogtag_constants.EE_SECURE_PORT),
                '-admin_secure_port',
                        str(self.dogtag_constants.ADMIN_SECURE_PORT),
                '-ee_secure_client_auth_port',
                        str(self.dogtag_constants.EE_CLIENT_AUTH_PORT),
                '-unsecure_port', str(self.dogtag_constants.UNSECURE_PORT),
                '-tomcat_server_port',
                        str(self.dogtag_constants.TOMCAT_SERVER_PORT),
                '-redirect', 'conf=/etc/pki-ca',
                '-redirect', 'logs=/var/log/pki-ca',
                '-enable_proxy'
        ]
        self.backup_state('installed', True)
        ipautil.run(args, env={'PKI_HOSTNAME':self.fqdn})

    def __configure_instance(self):
        # Only used for Dogtag 9
        preop_pin = get_preop_pin(
            self.server_root, self.dogtag_constants.PKI_INSTANCE_NAME)

        try:
            args = [paths.PERL, paths.PKISILENT,  "ConfigureCA",
                    "-cs_hostname", self.fqdn,
                    "-cs_port", str(self.dogtag_constants.ADMIN_SECURE_PORT),
                    "-client_certdb_dir", self.agent_db,
                    "-client_certdb_pwd", self.admin_password,
                    "-preop_pin" , preop_pin,
                    "-domain_name", self.security_domain_name,
                    "-admin_user", "admin",
                    "-admin_email",  "root@localhost",
                    "-admin_password", self.admin_password,
                    "-agent_name", "ipa-ca-agent",
                    "-agent_key_size", "2048",
                    "-agent_key_type", "rsa",
                    "-agent_cert_subject", str(DN(('CN', 'ipa-ca-agent'), self.subject_base)),
                    "-ldap_host", self.fqdn,
                    "-ldap_port", str(self.ds_port),
                    "-bind_dn", "cn=Directory Manager",
                    "-bind_password", self.dm_password,
                    "-base_dn", str(self.basedn),
                    "-db_name", "ipaca",
                    "-key_size", "2048",
                    "-key_type", "rsa",
                    "-key_algorithm", self.ca_signing_algorithm,
                    "-signing_algorithm", "SHA256withRSA",
                    "-save_p12", "true",
                    "-backup_pwd", self.admin_password,
                    "-subsystem_name", self.service_name,
                    "-token_name", "internal",
                    "-ca_subsystem_cert_subject_name", str(DN(('CN', 'CA Subsystem'), self.subject_base)),
                    "-ca_subsystem_cert_subject_name", str(DN(('CN', 'CA Subsystem'), self.subject_base)),
                    "-ca_ocsp_cert_subject_name", str(DN(('CN', 'OCSP Subsystem'), self.subject_base)),
                    "-ca_server_cert_subject_name", str(DN(('CN', self.fqdn), self.subject_base)),
                    "-ca_audit_signing_cert_subject_name", str(DN(('CN', 'CA Audit'), self.subject_base)),
                    "-ca_sign_cert_subject_name", str(DN(('CN', 'Certificate Authority'), self.subject_base)) ]
            if self.external == 1:
                args.append("-external")
                args.append("true")
                args.append("-ext_csr_file")
                args.append(self.csr_file)
            elif self.external == 2:
                cert = x509.load_certificate_from_file(self.cert_file)
                cert_file = tempfile.NamedTemporaryFile()
                x509.write_certificate(cert.der_data, cert_file.name)
                cert_file.flush()

                args.append("-external")
                args.append("true")
                args.append("-ext_ca_cert_file")
                args.append(cert_file.name)
                args.append("-ext_ca_cert_chain_file")
                args.append(self.cert_chain_file)
            else:
                args.append("-external")
                args.append("false")
            if self.clone:
                """sd = security domain -->  all CS systems get registered to
                   a security domain. This is set to the hostname and port of
                   the master CA.
                """
                # The install wizard expects the file to be here.
                cafile = self.pkcs12_info[0]
                shutil.copy(cafile, paths.PKI_ALIAS_CA_P12)
                pent = pwd.getpwnam(PKI_USER)
                os.chown(paths.PKI_ALIAS_CA_P12, pent.pw_uid, pent.pw_gid )
                args.append("-clone")
                args.append("true")
                args.append("-clone_p12_file")
                args.append("ca.p12")
                args.append("-clone_p12_password")
                args.append(self.dm_password)
                args.append("-sd_hostname")
                args.append(self.master_host)
                args.append("-sd_admin_port")
                args.append("443")
                args.append("-sd_admin_name")
                args.append("admin")
                args.append("-sd_admin_password")
                args.append(self.admin_password)
                args.append("-clone_master_port")
                args.append(str(self.master_replication_port))
                args.append("-clone_start_tls")
                args.append("true")
                args.append("-clone_uri")
                args.append("https://%s" % ipautil.format_netloc(self.master_host, 443))
            else:
                args.append("-clone")
                args.append("false")

            # Define the things we don't want logged
            nolog = (self.admin_password, self.dm_password,)

            ipautil.run(args, env={'PKI_HOSTNAME':self.fqdn}, nolog=nolog)
        except ipautil.CalledProcessError, e:
            self.log.critical("failed to configure ca instance %s", e)
            raise RuntimeError('Configuration of CA failed')

        if self.external == 1:
            print "The next step is to get %s signed by your CA and re-run %s as:" % (self.csr_file, sys.argv[0])
            print "%s --external_cert_file=/path/to/signed_certificate --external_ca_file=/path/to/external_ca_certificate" % sys.argv[0]
            sys.exit(0)

        # pkisilent makes a copy of the CA PKCS#12 file for us but gives
        # it a lousy name.
        if ipautil.file_exists(paths.ROOT_TMP_CA_P12):
            shutil.move(paths.ROOT_TMP_CA_P12, paths.CACERT_P12)

        self.log.debug("completed creating ca instance")

    def backup_config(self):
        try:
            backup_config(self.dogtag_constants)
        except Exception, e:
            root_logger.warning("Failed to backup CS.cfg: %s", e)

    def __disable_nonce(self):
        # Turn off Nonces
        update_result = installutils.update_file(
            self.dogtag_constants.CS_CFG_PATH, 'ca.enableNonces=true',
            'ca.enableNonces=false')
        if update_result != 0:
            raise RuntimeError("Disabling nonces failed")
        pent = pwd.getpwnam(PKI_USER)
        os.chown(self.dogtag_constants.CS_CFG_PATH,
                 pent.pw_uid, pent.pw_gid)

    def enable_pkix(self):
        installutils.set_directive(self.dogtag_constants.SYSCONFIG_FILE_PATH,
                                   'NSS_ENABLE_PKIX_VERIFY', '1',
                                   quotes=False, separator='=')

    def __issue_ra_cert(self):
        # The CA certificate is in the agent DB but isn't trusted
        (admin_fd, admin_name) = tempfile.mkstemp()
        os.write(admin_fd, self.admin_password)
        os.close(admin_fd)

        # Look through the cert chain to get all the certs we need to add
        # trust for
        p = subprocess.Popen([paths.CERTUTIL, "-d", self.agent_db,
                              "-O", "-n", "ipa-ca-agent"], stdout=subprocess.PIPE)

        chain = p.stdout.read()
        chain = chain.split("\n")

        root_nickname=[]
        for i in xrange(len(chain)):
            m = re.match('\ *"(.*)" \[.*', chain[i])
            if m:
                nick = m.groups(0)[0]
                if nick != "ipa-ca-agent" and nick[:7] != "Builtin":
                    root_nickname.append(m.groups()[0])

        try:
            for nick in root_nickname:
                self.__run_certutil(
                    ['-M', '-t', 'CT,C,C', '-n',
                     nick],
                     database=self.agent_db, pwd_file=self.admin_password)
        finally:
            os.remove(admin_name)

        # Retrieve the certificate request so we can get the values needed
        # to issue a certificate. Use sslget here because this is a
        # temporary database and nsslib doesn't currently support gracefully
        # opening and closing an NSS database. This would leave the installer
        # process stuck using this database during the entire cycle. We need
        # to use the final RA agent database when issuing certs for DS and
        # mod_nss.
        args = [
            paths.SSLGET,
            '-v',
            '-n', 'ipa-ca-agent',
            '-p', self.admin_password,
            '-d', self.agent_db,
            '-r', '/ca/agent/ca/profileReview?requestId=%s' % self.requestId,
            '%s' % ipautil.format_netloc(
                self.fqdn, self.dogtag_constants.AGENT_SECURE_PORT),
        ]
        (stdout, _stderr, _returncode) = ipautil.run(
            args, nolog=(self.admin_password,))

        data = stdout.split(self.dogtag_constants.RACERT_LINE_SEP)
        params = get_defList(data)
        params['requestId'] = find_substring(data, "requestId")
        params['op'] = 'approve'
        params['submit'] = 'submit'
        params['requestNotes'] = ''
        params = urllib.urlencode(params)

        # Now issue the RA certificate.
        args = [
            paths.SSLGET,
            '-v',
            '-n', 'ipa-ca-agent',
            '-p', self.admin_password,
            '-d', self.agent_db,
            '-e', params,
            '-r', '/ca/agent/ca/profileProcess',
            '%s' % ipautil.format_netloc(
                self.fqdn, self.dogtag_constants.AGENT_SECURE_PORT),
        ]
        (stdout, _stderr, _returncode) = ipautil.run(
            args, nolog=(self.admin_password,))

        data = stdout.split(self.dogtag_constants.RACERT_LINE_SEP)
        outputList = get_outputList(data)

        self.ra_cert = outputList['b64_cert']

        # Strip certificate headers and convert it to proper line ending
        self.ra_cert = x509.strip_header(self.ra_cert)
        self.ra_cert = "\n".join(line.strip() for line
                                 in self.ra_cert.splitlines() if line.strip())

        # Add the new RA cert to the database in /etc/httpd/alias
        (agent_fd, agent_name) = tempfile.mkstemp()
        os.write(agent_fd, self.ra_cert)
        os.close(agent_fd)
        try:
            self.__run_certutil(
                ['-A', '-t', 'u,u,u', '-n', 'ipaCert', '-a',
                 '-i', agent_name]
            )
        finally:
            os.remove(agent_name)

    def import_ra_cert(self, rafile):
        """
        Cloned RAs will use the same RA agent cert as the master so we
        need to import from a PKCS#12 file.

        Used when setting up replication
        """
        # Add the new RA cert to the database in /etc/httpd/alias
        (agent_fd, agent_name) = tempfile.mkstemp()
        os.write(agent_fd, self.dm_password)
        os.close(agent_fd)
        try:
            import_pkcs12(rafile, agent_name, self.ra_agent_db, self.ra_agent_pwd)
        finally:
            os.remove(agent_name)

        self.configure_agent_renewal()

    def __configure_ra(self):
        # Create an RA user in the CA LDAP server and add that user to
        # the appropriate groups so it can issue certificates without
        # manual intervention.
        conn = ipaldap.IPAdmin(self.fqdn, self.ds_port)
        conn.do_simple_bind(DN(('cn', 'Directory Manager')), self.dm_password)

        decoded = base64.b64decode(self.ra_cert)

        entry_dn = DN(('uid', "ipara"), ('ou', 'People'), self.basedn)
        entry = conn.make_entry(
            entry_dn,
            objectClass=['top', 'person', 'organizationalPerson',
                         'inetOrgPerson', 'cmsuser'],
            uid=["ipara"],
            sn=["ipara"],
            cn=["ipara"],
            usertype=["agentType"],
            userstate=["1"],
            userCertificate=[decoded],
            description=['2;%s;%s;%s' % (
                str(self.requestId),
                DN(('CN', 'Certificate Authority'), self.subject_base),
                DN(('CN', 'IPA RA'), self.subject_base))])

        conn.add_entry(entry)

        dn = DN(('cn', 'Certificate Manager Agents'), ('ou', 'groups'), self.basedn)
        modlist = [(0, 'uniqueMember', '%s' % entry_dn)]
        conn.modify_s(dn, modlist)

        dn = DN(('cn', 'Registration Manager Agents'), ('ou', 'groups'), self.basedn)
        modlist = [(0, 'uniqueMember', '%s' % entry_dn)]
        conn.modify_s(dn, modlist)

        conn.unbind()

    def __run_certutil(self, args, database=None, pwd_file=None, stdin=None):
        if not database:
            database = self.ra_agent_db
        if not pwd_file:
            pwd_file = self.ra_agent_pwd
        new_args = [paths.CERTUTIL, "-d", database, "-f", pwd_file]
        new_args = new_args + args
        return ipautil.run(new_args, stdin, nolog=(pwd_file,))

    def __create_ra_agent_db(self):
        if ipautil.file_exists(self.ra_agent_db + "/cert8.db"):
            ipautil.backup_file(self.ra_agent_db + "/cert8.db")
            ipautil.backup_file(self.ra_agent_db + "/key3.db")
            ipautil.backup_file(self.ra_agent_db + "/secmod.db")
            ipautil.backup_file(self.ra_agent_db + "/pwdfile.txt")

        if not ipautil.dir_exists(self.ra_agent_db):
            os.mkdir(self.ra_agent_db)

        # Create the password file for this db
        hex_str = binascii.hexlify(os.urandom(10))
        f = os.open(self.ra_agent_pwd, os.O_CREAT | os.O_RDWR)
        os.write(f, hex_str)
        os.close(f)
        os.chmod(self.ra_agent_pwd, stat.S_IRUSR)

        self.__run_certutil(["-N"])

    def __get_ca_chain(self):
        try:
            return dogtag.get_ca_certchain(ca_host=self.fqdn,
                dogtag_constants=self.dogtag_constants)
        except Exception, e:
            raise RuntimeError("Unable to retrieve CA chain: %s" % str(e))

    def __create_ca_agent_pkcs12(self):
        # Only used for Dogtag 9
        (pwd_fd, pwd_name) = tempfile.mkstemp()
        os.write(pwd_fd, self.admin_password)
        os.close(pwd_fd)
        try:
            ipautil.run([paths.PK12UTIL,
                         "-n", "ipa-ca-agent",
                         "-o", paths.DOGTAG_AGENT_P12,
                         "-d", self.agent_db,
                         "-k", pwd_name,
                         "-w", pwd_name])
        finally:
            os.remove(pwd_name)

    def __import_ca_chain(self):
        chain = self.__get_ca_chain()

        # If this chain contains multiple certs then certutil will only import
        # the first one. So we have to pull them all out and import them
        # separately. Unfortunately no NSS tool can do this so we have to
        # use openssl.

        # Convert to DER because the chain comes back as one long string which
        # makes openssl throw up.
        data = base64.b64decode(chain)

        (certlist, _stderr, _returncode) = ipautil.run(
            [paths.OPENSSL,
             "pkcs7",
             "-inform",
             "DER",
             "-print_certs",
             ], stdin=data)

        # Ok, now we have all the certificates in certs, walk through it
        # and pull out each certificate and add it to our database

        st = 1
        en = 0
        subid = 0
        ca_dn = DN(('CN','Certificate Authority'), self.subject_base)
        while st > 0:
            st = certlist.find('-----BEGIN', en)
            en = certlist.find('-----END', en+1)
            if st > 0:
                try:
                    (chain_fd, chain_name) = tempfile.mkstemp()
                    os.write(chain_fd, certlist[st:en+25])
                    os.close(chain_fd)
                    (_rdn, subject_dn) = certs.get_cert_nickname(certlist[st:en+25])
                    if subject_dn == ca_dn:
                        nick = get_ca_nickname(self.realm)
                        trust_flags = 'CT,C,C'
                    else:
                        nick = str(subject_dn)
                        trust_flags = ',,'
                    self.__run_certutil(
                        ['-A', '-t', trust_flags, '-n', nick, '-a',
                         '-i', chain_name]
                    )
                finally:
                    os.remove(chain_name)
                    subid += 1

    def __request_ra_certificate(self):
        # Create a noise file for generating our private key
        noise = array.array('B', os.urandom(128))
        (noise_fd, noise_name) = tempfile.mkstemp()
        os.write(noise_fd, noise)
        os.close(noise_fd)

        # Generate our CSR. The result gets put into stdout
        try:
            (stdout, _stderr, _returncode) = self.__run_certutil(
                ["-R", "-k", "rsa", "-g", "2048", "-s",
                 str(DN(('CN', 'IPA RA'), self.subject_base)),
                 "-z", noise_name, "-a"])
        finally:
            os.remove(noise_name)

        csr = pkcs10.strip_header(stdout)

        # Send the request to the CA
        conn = httplib.HTTPConnection(
            self.fqdn, self.dogtag_constants.UNSECURE_PORT)
        params = urllib.urlencode({'profileId': 'caServerCert',
                'cert_request_type': 'pkcs10',
                'requestor_name': 'IPA Installer',
                'cert_request': csr,
                'xmlOutput': 'true'})
        headers = {"Content-type": "application/x-www-form-urlencoded",
                   "Accept": "text/plain"}

        conn.request("POST", "/ca/ee/ca/profileSubmit", params, headers)
        res = conn.getresponse()
        if res.status == 200:
            data = res.read()
            conn.close()
            doc = xml.dom.minidom.parseString(data)
            item_node = doc.getElementsByTagName("RequestId")
            self.requestId = item_node[0].childNodes[0].data
            doc.unlink()
            self.requestId = self.requestId.strip()
            if self.requestId is None:
                raise RuntimeError("Unable to determine RA certificate requestId")
        else:
            conn.close()
            raise RuntimeError("Unable to submit RA cert request")

    def fix_ra_perms(self):
        os.chmod(self.ra_agent_db + "/cert8.db", 0640)
        os.chmod(self.ra_agent_db + "/key3.db", 0640)
        os.chmod(self.ra_agent_db + "/secmod.db", 0640)

        pent = pwd.getpwnam("apache")
        os.chown(self.ra_agent_db + "/cert8.db", 0, pent.pw_gid )
        os.chown(self.ra_agent_db + "/key3.db", 0, pent.pw_gid )
        os.chown(self.ra_agent_db + "/secmod.db", 0, pent.pw_gid )
        os.chown(self.ra_agent_pwd, pent.pw_uid, pent.pw_gid)

    def __setup_sign_profile(self):
        # Tell the profile to automatically issue certs for RAs
        installutils.set_directive(self.dogtag_constants.SIGN_PROFILE,
                'auth.instance_id', 'raCertAuth', quotes=False, separator='=')

    def prepare_crl_publish_dir(self):
        """
        Prepare target directory for CRL publishing

        Returns a path to the CRL publishing directory
        """
        publishdir = self.dogtag_constants.CRL_PUBLISH_PATH

        if not os.path.exists(publishdir):
            os.mkdir(publishdir)

        os.chmod(publishdir, 0775)
        pent = pwd.getpwnam(PKI_USER)
        os.chown(publishdir, 0, pent.pw_gid)

        tasks.restore_context(publishdir)

        return publishdir

    def __set_crl_ocsp_extensions(self):
        self.set_crl_ocsp_extensions(self.domain, self.fqdn)

    def set_crl_ocsp_extensions(self, domain, fqdn):
        """
        Configure CRL and OCSP extensions in default IPA certificate profile
        if not done already.
        """
        changed = False

        # OCSP extension
        ocsp_url = 'http://%s.%s/ca/ocsp' % (IPA_CA_RECORD, ipautil.format_netloc(domain))

        ocsp_location_0 = installutils.get_directive(
            self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.5.default.params.authInfoAccessADLocation_0',
            separator='=')

        if ocsp_location_0 != ocsp_url:
            # Set the first OCSP URI
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.5.default.params.authInfoAccessADLocation_0',
                ocsp_url, quotes=False, separator='=')
            changed = True

        ocsp_profile_count = installutils.get_directive(
            self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.5.default.params.authInfoAccessNumADs',
            separator='=')

        if ocsp_profile_count != '1':
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.5.default.params.authInfoAccessNumADs',
                '1', quotes=False, separator='=')
            changed = True


        # CRL extension
        crl_url = 'http://%s.%s/ipa/crl/MasterCRL.bin'% (IPA_CA_RECORD, ipautil.format_netloc(domain))

        crl_point_0 = installutils.get_directive(
            self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.9.default.params.crlDistPointsPointName_0',
            separator='=')

        if crl_point_0 != crl_url:
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.9.default.params.crlDistPointsIssuerName_0',
                'CN=Certificate Authority,o=ipaca', quotes=False, separator='=')
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.9.default.params.crlDistPointsIssuerType_0',
                'DirectoryName', quotes=False, separator='=')
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.9.default.params.crlDistPointsPointName_0',
                crl_url, quotes=False, separator='=')
            changed = True

        crl_profile_count = installutils.get_directive(
            self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.9.default.params.crlDistPointsNum',
            separator='=')

        if crl_profile_count != '1':
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.9.default.params.crlDistPointsNum',
                '1', quotes=False, separator='=')
            changed = True

        # CRL extension is not enabled by default
        setlist = installutils.get_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.list', separator='=')
        new_set_list = None

        if setlist == '1,2,3,4,5,6,7,8':
            new_set_list = '1,2,3,4,5,6,7,8,9'
        elif setlist == '1,2,3,4,5,6,7,8,10':
            new_set_list = '1,2,3,4,5,6,7,8,9,10'
        elif setlist == '1,2,3,4,5,6,7,8,10,11':
            new_set_list = '1,2,3,4,5,6,7,8,9,10,11'

        if new_set_list:
            installutils.set_directive(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.list',
                new_set_list, quotes=False, separator='=')
            changed = True

        return changed


    def __enable_crl_publish(self):
        """
        Enable file-based CRL publishing and disable LDAP publishing.

        https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Certificate_System/8.0/html/Admin_Guide/Setting_up_Publishing.html
        """
        caconfig = self.dogtag_constants.CS_CFG_PATH

        publishdir = self.prepare_crl_publish_dir()

        # Enable file publishing, disable LDAP
        installutils.set_directive(caconfig, 'ca.publish.enable', 'true', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.ldappublish.enable', 'false', quotes=False, separator='=')

        # Create the file publisher, der only, not b64
        installutils.set_directive(caconfig, 'ca.publish.publisher.impl.FileBasedPublisher.class','com.netscape.cms.publish.publishers.FileBasedPublisher', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.crlLinkExt', 'bin', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.directory', publishdir, quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.latestCrlLink', 'true', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.pluginName', 'FileBasedPublisher', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.timeStamp', 'LocalTime', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.zipCRLs', 'false', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.zipLevel', '9', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.Filename.b64', 'false', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.publisher.instance.FileBaseCRLPublisher.Filename.der', 'true', quotes=False, separator='=')

        # The publishing rule
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.FileCrlRule.enable', 'true', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.FileCrlRule.mapper', 'NoMap', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.FileCrlRule.pluginName', 'Rule', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.FileCrlRule.predicate=', '', quotes=False, separator='')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.FileCrlRule.publisher', 'FileBaseCRLPublisher', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.FileCrlRule.type', 'crl', quotes=False, separator='=')

        # Now disable LDAP publishing
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.LdapCaCertRule.enable', 'false', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.LdapCrlRule.enable', 'false', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.LdapUserCertRule.enable', 'false', quotes=False, separator='=')
        installutils.set_directive(caconfig, 'ca.publish.rule.instance.LdapXCertRule.enable', 'false', quotes=False, separator='=')

        # If we are the initial master then we are the CRL generator, otherwise
        # we point to that master for CRLs.
        if not self.clone:
            # These next two are defaults, but I want to be explicit that the
            # initial master is the CRL generator.
            installutils.set_directive(caconfig, 'ca.crl.MasterCRL.enableCRLCache', 'true', quotes=False, separator='=')
            installutils.set_directive(caconfig, 'ca.crl.MasterCRL.enableCRLUpdates', 'true', quotes=False, separator='=')
            installutils.set_directive(caconfig, 'ca.listenToCloneModifications', 'true', quotes=False, separator='=')
        else:
            installutils.set_directive(caconfig, 'ca.crl.MasterCRL.enableCRLCache', 'false', quotes=False, separator='=')
            installutils.set_directive(caconfig, 'ca.crl.MasterCRL.enableCRLUpdates', 'false', quotes=False, separator='=')
            installutils.set_directive(caconfig, 'ca.listenToCloneModifications', 'false', quotes=False, separator='=')

    def __set_subject_in_config(self):
        # dogtag ships with an IPA-specific profile that forces a subject
        # format. We need to update that template with our base subject
        if installutils.update_file(self.dogtag_constants.IPA_SERVICE_PROFILE,
                'OU=pki-ipa, O=IPA', str(self.subject_base)):
            print "Updating subject_base in CA template failed"

    def uninstall(self):
        enabled = self.restore_state("enabled")
        if not enabled is None and not enabled:
            self.disable()

        if self.dogtag_constants.DOGTAG_VERSION >= 10:
            DogtagInstance.uninstall(self)
        else:
            if self.is_configured():
                self.print_msg("Unconfiguring CA")

            try:
                ipautil.run([paths.PKIREMOVE,
                             "-pki_instance_root=%s" % paths.VAR_LIB,
                             "-pki_instance_name=%s" %
                                self.dogtag_constants.PKI_INSTANCE_NAME,
                             "--force"])
            except ipautil.CalledProcessError, e:
                self.log.critical("failed to uninstall CA instance %s", e)

        self.restore_state("installed")

        # At one time we removed this user on uninstall. That can potentially
        # orphan files, or worse, if another useradd runs in the interim,
        # cause files to have a new owner.
        self.restore_state("user_exists")

        services.knownservices.messagebus.start()
        cmonger = services.knownservices.certmonger
        cmonger.start()

        bus = dbus.SystemBus()
        obj = bus.get_object('org.fedorahosted.certmonger',
                             '/org/fedorahosted/certmonger')
        iface = dbus.Interface(obj, 'org.fedorahosted.certmonger')
        path = iface.find_ca_by_nickname('dogtag-ipa-ca-renew-agent')
        if path:
            iface.remove_known_ca(path)

        cmonger.stop()

        # remove CRL files
        self.log.info("Remove old CRL files")
        try:
            for f in get_crl_files():
                self.log.debug("Remove %s", f)
                installutils.remove_file(f)
        except OSError, e:
            self.log.warning("Error while removing old CRL files: %s", e)

        # remove CRL directory
        self.log.info("Remove CRL directory")
        if os.path.exists(self.dogtag_constants.CRL_PUBLISH_PATH):
            try:
                shutil.rmtree(self.dogtag_constants.CRL_PUBLISH_PATH)
            except OSError, e:
                self.log.warning("Error while removing CRL publish "
                                    "directory: %s", e)

    def publish_ca_cert(self, location):
        args = ["-L", "-n", self.canickname, "-a"]
        (cert, _err, _returncode) = self.__run_certutil(args)
        fd = open(location, "w+")
        fd.write(cert)
        fd.close()
        os.chmod(location, 0444)

    @staticmethod
    def configure_certmonger_renewal():
        """
        Create a new CA type for certmonger that will retrieve updated
        certificates from the dogtag master server.
        """
        services.knownservices.messagebus.start()
        cmonger = services.knownservices.certmonger
        cmonger.enable()
        cmonger.start()

        bus = dbus.SystemBus()
        obj = bus.get_object('org.fedorahosted.certmonger',
                             '/org/fedorahosted/certmonger')
        iface = dbus.Interface(obj, 'org.fedorahosted.certmonger')
        path = iface.find_ca_by_nickname('dogtag-ipa-ca-renew-agent')
        if not path:
            iface.add_known_ca(
                'dogtag-ipa-ca-renew-agent',
                paths.DOGTAG_IPA_CA_RENEW_AGENT_SUBMIT, [])

    def configure_agent_renewal(self):
        try:
            certmonger.dogtag_start_tracking(
                ca='dogtag-ipa-ca-renew-agent',
                nickname='ipaCert',
                pin=None,
                pinfile=paths.ALIAS_PWDFILE_TXT,
                secdir=paths.HTTPD_ALIAS_DIR,
                pre_command=None,
                post_command='renew_ra_cert')
        except RuntimeError, e:
            self.log.error(
                "certmonger failed to start tracking certificate: %s", e)

    def __get_ca_pin(self):
        try:
            return certmonger.get_pin(
                'internal',
                dogtag_constants=self.dogtag_constants)
        except IOError, e:
            raise RuntimeError(
                'Unable to determine PIN for CA instance: %s' % e)

    def configure_cert_renewal(self):
        """
        Configure system certificates for renewal.
        """
        reqs = (
            ('auditSigningCert cert-pki-ca', None),
            ('ocspSigningCert cert-pki-ca',  None),
            ('subsystemCert cert-pki-ca',    None),
            ('caSigningCert cert-pki-ca',    'ipaCACertRenewal'),
        )

        DogtagInstance.configure_renewal(self, reqs)

    def track_servercert(self):
        """
        Specifically do not tell certmonger to restart the CA. This will be
        done by the renewal script, renew_ca_cert once all the subsystem
        certificates are renewed.
        """
        pin = self.__get_ca_pin()
        try:
            certmonger.dogtag_start_tracking(
                ca='dogtag-ipa-renew-agent',
                nickname='Server-Cert cert-pki-ca',
                pin=pin,
                pinfile=None,
                secdir=self.dogtag_constants.ALIAS_DIR,
                pre_command=None,
                post_command=None)
        except RuntimeError, e:
            self.log.error(
                "certmonger failed to start tracking certificate: %s", e)

    @staticmethod
    def stop_tracking_agent_certificate(dogtag_constants):
        """Stop tracking agent certificate. Called on uninstall.
        """
        cmonger = services.knownservices.certmonger
        services.knownservices.messagebus.start()
        cmonger.start()
        try:
            certmonger.stop_tracking(paths.HTTPD_ALIAS_DIR, nickname='ipaCert')
        except RuntimeError, e:
            root_logger.error(
                "certmonger failed to stop tracking certificate: %s", e)
        cmonger.stop()

    def enable_subject_key_identifier(self):
        """
        See if Subject Key Identifier is set in the profile and if not, add it.
        """
        setlist = installutils.get_directive(
            self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.list', separator='=')

        # this is the default setting from pki-ca/pki-tomcat. Don't touch it
        # if a user has manually modified it.
        if setlist == '1,2,3,4,5,6,7,8' or setlist == '1,2,3,4,5,6,7,8,9':
            setlist += ',10'
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.list',
                setlist,
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.10.constraint.class_id',
                'noConstraintImpl',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.10.constraint.name',
                'No Constraint',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.10.default.class_id',
                'subjectKeyIdentifierExtDefaultImpl',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.10.default.name',
                'Subject Key Identifier Extension Default',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.10.default.params.critical',
                'false',
                quotes=False, separator='=')
            return True

        # No update was done
        return False

    def enable_subject_alternative_name(self):
        """
        See if Subject Alternative Name is set in the profile and if not, add
        it.
        """
        setlist = installutils.get_directive(
            self.dogtag_constants.IPA_SERVICE_PROFILE,
            'policyset.serverCertSet.list', separator='=')

        # this is the default setting from pki-ca/pki-tomcat. Don't touch it
        # if a user has manually modified it.
        if setlist == '1,2,3,4,5,6,7,8,10' or setlist == '1,2,3,4,5,6,7,8,9,10':
            setlist += ',11'
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.list',
                setlist,
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.11.constraint.class_id',
                'noConstraintImpl',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.11.constraint.name',
                'No Constraint',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.11.default.class_id',
                'userExtensionDefaultImpl',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.11.default.name',
                'User Supplied Extension Default',
                quotes=False, separator='=')
            installutils.set_directive(
                self.dogtag_constants.IPA_SERVICE_PROFILE,
                'policyset.serverCertSet.11.default.params.userExtOID',
                '2.5.29.17',
                quotes=False, separator='=')
            return True

        # No update was done
        return False

    def set_audit_renewal(self):
        """
        The default renewal time for the audit signing certificate is
        six months rather than two years. Fix it. This is BZ 843979.
        """
        # Check the default validity period of the audit signing cert
        # and set it to 2 years if it is 6 months.
        cert_range = installutils.get_directive(
            '%s/caSignedLogCert.cfg' % self.dogtag_constants.SERVICE_PROFILE_DIR,
            'policyset.caLogSigningSet.2.default.params.range',
            separator='='
        )
        self.log.debug(
            'caSignedLogCert.cfg profile validity range is %s', cert_range)
        if cert_range == "180":
            installutils.set_directive(
                '%s/caSignedLogCert.cfg' % self.dogtag_constants.SERVICE_PROFILE_DIR,
                'policyset.caLogSigningSet.2.default.params.range',
                '720',
                quotes=False,
                separator='='
            )
            installutils.set_directive(
                '%s/caSignedLogCert.cfg' % self.dogtag_constants.SERVICE_PROFILE_DIR,
                'policyset.caLogSigningSet.2.constraint.params.range',
                '720',
                quotes=False,
                separator='='
            )
            self.log.debug(
                'updated caSignedLogCert.cfg profile validity range to 720')
            return True
        return False

    def is_renewal_master(self, fqdn=None):
        if fqdn is None:
            fqdn = api.env.host

        if not self.admin_conn:
            self.ldap_connect()

        dn = DN(('cn', 'CA'), ('cn', fqdn), ('cn', 'masters'), ('cn', 'ipa'),
                ('cn', 'etc'), api.env.basedn)
        renewal_filter = '(ipaConfigString=caRenewalMaster)'
        try:
            self.admin_conn.get_entries(base_dn=dn, filter=renewal_filter,
                                        attrs_list=[])
        except errors.NotFound:
            return False

        return True

    def set_renewal_master(self, fqdn=None):
        if fqdn is None:
            fqdn = api.env.host

        if not self.admin_conn:
            self.ldap_connect()

        base_dn = DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'),
                     api.env.basedn)
        filter = '(&(cn=CA)(ipaConfigString=caRenewalMaster))'
        try:
            entries = self.admin_conn.get_entries(
                base_dn=base_dn, filter=filter, attrs_list=['ipaConfigString'])
        except errors.NotFound:
            entries = []

        dn = DN(('cn', 'CA'), ('cn', fqdn), base_dn)
        master_entry = self.admin_conn.get_entry(dn, ['ipaConfigString'])

        for entry in entries:
            if master_entry is not None and entry.dn == master_entry.dn:
                master_entry = None
                continue

            entry['ipaConfigString'] = [x for x in entry['ipaConfigString']
                                        if x.lower() != 'carenewalmaster']
            self.admin_conn.update_entry(entry)

        if master_entry is not None:
            master_entry['ipaConfigString'].append('caRenewalMaster')
            self.admin_conn.update_entry(master_entry)


    @staticmethod
    def update_cert_config(nickname, cert, dogtag_constants=None):
        """
        When renewing a CA subsystem certificate the configuration file
        needs to get the new certificate as well.

        nickname is one of the known nicknames.
        cert is a DER-encoded certificate.
        """

        if dogtag_constants is None:
            dogtag_constants = dogtag.configured_constants()

        # The cert directive to update per nickname
        directives = {'auditSigningCert cert-pki-ca': 'ca.audit_signing.cert',
                      'ocspSigningCert cert-pki-ca': 'ca.ocsp_signing.cert',
                      'caSigningCert cert-pki-ca': 'ca.signing.cert',
                      'subsystemCert cert-pki-ca': 'ca.subsystem.cert',
                      'Server-Cert cert-pki-ca': 'ca.sslserver.cert'}

        try:
            backup_config(dogtag_constants)
        except Exception, e:
            syslog.syslog(syslog.LOG_ERR, "Failed to backup CS.cfg: %s" % e)

        DogtagInstance.update_cert_cs_cfg(
            nickname, cert, directives,
            dogtag.configured_constants().CS_CFG_PATH,
            dogtag_constants)

def replica_ca_install_check(config):
    if not config.setup_ca:
        return

    cafile = config.dir + "/cacert.p12"
    if not ipautil.file_exists(cafile):
        # Replica of old "self-signed" master - CA won't be installed
        return

    # Exit if we have an old-style (Dogtag 9) CA already installed
    ca = CAInstance(config.realm_name, certs.NSS_DIR,
        dogtag_constants=dogtag.Dogtag9Constants)
    if ca.is_installed():
        root_logger.info('Dogtag 9 style CA instance found')
        sys.exit("A CA is already configured on this system.")

    if config.ca_ds_port != dogtag.Dogtag9Constants.DS_PORT:
        root_logger.debug(
            'Installing CA Replica from master with a merged database')
        return

    # Check if the master has the necessary schema in its CA instance
    ca_ldap_url = 'ldap://%s:%s' % (config.master_host_name, config.ca_ds_port)
    objectclass = 'ipaObject'
    root_logger.debug('Checking if IPA schema is present in %s', ca_ldap_url)
    try:
        connection = ldap2.IPASimpleLDAPObject(
            ca_ldap_url, force_schema_updates=False)
        connection.start_tls_s()
        connection.simple_bind_s(DN(('cn', 'Directory Manager')),
                                config.dirman_password)
        rschema = connection.schema
        result = rschema.get_obj(ldap.schema.models.ObjectClass, objectclass)
    except Exception:
        root_logger.critical(
            'CA DS schema check failed. Make sure the PKI service on the '
            'remote master is operational.')
        raise
    if result:
        root_logger.debug('Check OK')
    else:
        root_logger.critical(
            'The master CA directory server does not have necessary schema. '
            'Please copy the following script to all CA masters and run it '
            'on them: %s\n'
            'If you are certain that this is a false positive, use '
            '--skip-schema-check.',
                os.path.join(ipautil.SHARE_DIR, 'copy-schema-to-ca.py'))
        exit('IPA schema missing on master CA directory server')


def install_replica_ca(config, postinstall=False):
    """
    Install a CA on a replica.

    There are two modes of doing this controlled:
      - While the replica is being installed
      - Post-replica installation

    config is a ReplicaConfig object

    Returns a tuple of the CA and CADS instances
    """
    cafile = config.dir + "/cacert.p12"

    if not ipautil.file_exists(cafile):
        # Replica of old "self-signed" master - skip installing CA
        return None

    if not config.setup_ca:
        # We aren't configuring the CA in this step but we still need
        # a minimum amount of information on the CA for this IPA install.
        ca = CAInstance(config.realm_name, certs.NSS_DIR,
            dogtag_constants=dogtag.install_constants)
        ca.dm_password = config.dirman_password
        ca.subject_base = config.subject_base
        return ca

    ca = CAInstance(config.realm_name, certs.NSS_DIR,
        dogtag_constants=dogtag.install_constants)
    ca.dm_password = config.dirman_password
    ca.subject_base = config.subject_base
    if ca.is_installed():
        sys.exit("A CA is already configured on this system.")

    ca = CAInstance(config.realm_name, certs.NSS_DIR,
            dogtag_constants=dogtag.install_constants)
    if postinstall:
        # If installing this afterward the Apache NSS database already
        # exists, don't remove it.
        ca.create_ra_agent_db = False
    ca.configure_instance(config.host_name, config.domain_name,
                          config.dirman_password, config.dirman_password,
                          pkcs12_info=(cafile,),
                          master_host=config.master_host_name,
                          master_replication_port=config.ca_ds_port,
                          subject_base=config.subject_base)

    # Restart httpd since we changed it's config and added ipa-pki-proxy.conf
    # Without the restart, CA service status check would fail due to missing
    # proxy
    if postinstall:
        services.knownservices.httpd.restart()


    # The dogtag DS instance needs to be restarted after installation.
    # The procedure for this is: stop dogtag, stop DS, start DS, start
    # dogtag
    #
    #
    # The service_name trickery is due to the service naming we do
    # internally. In the case of the dogtag DS the name doesn't match the
    # unix service.

    service.print_msg("Restarting the directory and certificate servers")
    ca.stop(dogtag.install_constants.PKI_INSTANCE_NAME)

    services.knownservices.dirsrv.restart()

    ca.start(dogtag.install_constants.PKI_INSTANCE_NAME)

    return ca

def backup_config(dogtag_constants=None):
    """
    Create a backup copy of CS.cfg
    """
    if dogtag_constants is None:
        dogtag_constants = dogtag.configured_constants()

    shutil.copy(dogtag_constants.CS_CFG_PATH,
                dogtag_constants.CS_CFG_PATH + '.ipabkp')

def update_people_entry(dercert):
    """
    Update the userCerticate for an entry in the dogtag ou=People. This
    is needed when a certificate is renewed.

    dercert: An X509.3 certificate in DER format

    Logging is done via syslog

    Returns True or False
    """
    base_dn = DN(('ou','People'), ('o','ipaca'))
    serial_number = x509.get_serial_number(dercert, datatype=x509.DER)
    subject = x509.get_subject(dercert, datatype=x509.DER)
    issuer = x509.get_issuer(dercert, datatype=x509.DER)

    attempts = 0
    server_id = dsinstance.realm_to_serverid(api.env.realm)
    dogtag_uri = 'ldapi://%%2fvar%%2frun%%2fslapd-%s.socket' % server_id
    updated = False

    while attempts < 10:
        conn = None
        try:
            conn = ldap2.ldap2(shared_instance=False, ldap_uri=dogtag_uri)
            conn.connect(autobind=True)

            db_filter = conn.make_filter(
                {'description': ';%s;%s' % (issuer, subject)},
                exact=False, trailing_wildcard=False)
            try:
                entries = conn.get_entries(base_dn, conn.SCOPE_SUBTREE, db_filter)
            except errors.NotFound:
                entries = []

            updated = True

            for entry in entries:
                syslog.syslog(
                    syslog.LOG_NOTICE, 'Updating entry %s' % str(entry.dn))

                try:
                    entry['usercertificate'].append(dercert)
                    entry['description'] = '2;%d;%s;%s' % (
                        serial_number, issuer, subject)

                    conn.update_entry(entry)
                except errors.EmptyModlist:
                    pass
                except Exception, e:
                    syslog.syslog(
                        syslog.LOG_ERR,
                        'Updating entry %s failed: %s' % (str(entry.dn), e))
                    updated = False

            break
        except errors.NetworkError:
            syslog.syslog(
                syslog.LOG_ERR,
                'Connection to %s failed, sleeping 30s' % dogtag_uri)
            time.sleep(30)
            attempts += 1
        except Exception, e:
            syslog.syslog(syslog.LOG_ERR, 'Caught unhandled exception: %s' % e)
            break
        finally:
            if conn is not None and conn.isconnected():
                conn.disconnect()

    if not updated:
        syslog.syslog(syslog.LOG_ERR, 'Update failed.')
        return False

    return True

if __name__ == "__main__":
    standard_logging_setup("install.log")
    ds = dsinstance.DsInstance()

    ca = CAInstance("EXAMPLE.COM", paths.HTTPD_ALIAS_DIR)
    ca.configure_instance("catest.example.com", "example.com", "password", "password")