Class: Yast::KerberosClass

Inherits:
Module
  • Object
show all
Defined in:
../../src/modules/Kerberos.rb

Instance Method Summary (collapse)

Instance Method Details

- (Hash) AutoPackages

Return required packages for auto-installation

Returns:

  • (Hash)

    of packages to be installed and to be removed



1040
1041
1042
# File '../../src/modules/Kerberos.rb', line 1040

def AutoPackages
  { "install" => RequiredPackages(), "remove" => [] }
end

- (Hash) Export

Dump the Kerberos settings to a map, for autoinstallation use.

Returns:

  • (Hash)

    with settings



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
# File '../../src/modules/Kerberos.rb', line 175

def Export
  export_map = {
    "pam_login"       => { "use_kerberos" => @use_pam_krb, "sssd" => @sssd },
    "kerberos_client" => {
      "default_domain"  => @default_domain,
      "default_realm"   => @default_realm,
      "kdc_server"      => @kdc,
      "clockskew"       => @clockskew,
      "ssh_support"     => @ssh_support,
      "ignore_unknown"  => @ignore_unknown,
      "ticket_lifetime" => @ticket_lifetime,
      "renew_lifetime"  => @renew_lifetime,
      "minimum_uid"     => @minimum_uid,
      "forwardable"     => @forwardable == "true",
      "proxiable"       => @proxiable == "true",
      "ExpertSettings"  => @ExpertSettings
    }
  }
  if @mappings != ""
    Ops.set(export_map, ["kerberos_client", "mappings"], @mappings)
  end
  if @trusted_servers != ""
    Ops.set(
      export_map,
      ["kerberos_client", "trusted_servers"],
      @trusted_servers
    )
  end
  deep_copy(export_map)
end

- (Object) Import(settings)

Get all the Kerberos configuration from a map.

Parameters:

  • settings (Hash)

    imported map

Returns:

  • success



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
# File '../../src/modules/Kerberos.rb', line 132

def Import(settings)
  settings = deep_copy(settings)
  @use_pam_krb = Ops.get_boolean(
    settings,
    ["pam_login", "use_kerberos"],
    false
  )
  client = Ops.get_map(settings, "kerberos_client", {})

  @default_domain = Ops.get_string(client, "default_domain", "")
  @default_realm = Ops.get_string(client, "default_realm", "")
  @kdc = Ops.get_string(client, "kdc_server", "")
  @clockskew = Ops.get_string(client, "clockskew", @clockskew)
  @ssh_support = Ops.get_boolean(client, "ssh_support", false)
  @ignore_unknown = Ops.get_boolean(
    client,
    "ignore_unknown",
    @ignore_unknown
  )
  @ticket_lifetime = Ops.get_string(client, "ticket_lifetime", "1d")
  @renew_lifetime = Ops.get_string(client, "renew_lifetime", "1d")
  @minimum_uid = Ops.get_string(client, "minimum_uid", @minimum_uid)
  @forwardable = Ops.get_boolean(client, "forwardable", true) ? "true" : "false"
  @proxiable = Ops.get_boolean(client, "proxiable", false) ? "true" : "false"
  @use_shmem = Ops.get_string(client, "use_shmem", @use_shmem)
  @mappings = Ops.get_string(client, "mappings", "")
  @trusted_servers = Ops.get_string(client, "trusted_servers", "")
  @ExpertSettings = Ops.get_map(client, "ExpertSettings", {})
  if !Builtins.haskey(@ExpertSettings, "use_shmem") &&
      Builtins.haskey(client, "use_shmem")
    Ops.set(@ExpertSettings, "use_shmem", @use_shmem)
  end

  @sssd = Ops.get_boolean(settings, ["pam_login", "sssd"], @sssd)
  @pam_modified = true
  @modified = true
  @ssh_modified = true
  true
end

- (Object) main



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
# File '../../src/modules/Kerberos.rb', line 35

def main

  textdomain "samba-client"

  Yast.import "FileUtils"
  Yast.import "Hostname"
  Yast.import "Label"
  Yast.import "Mode"
  Yast.import "Package"
  Yast.import "Pam"
  Yast.import "Progress"
  Yast.import "Report"
  Yast.import "Service"
  Yast.import "Stage"
  Yast.import "Summary"

  # Required packages for this module to operate
  @required_packages = ["pam_krb5", "krb5", "krb5-client"]

  @write_only = false

  # if pam_krb5 module is used for login
  @use_pam_krb = false

  # if pam_unix is in /etc/pam.d/login
  @pam_unix_present = false

  # default realm and domain name
  @default_realm = ""
  @default_domain = ""

  @dns_default_realm = ""
  @dns_kdc = ""

  # adress of KDC (key distribution centre) server for default realm
  @kdc = ""
  @admin_server = ""

  # used for pkinit-nss (feature 302132)
  @trusted_servers = ""

  @clockskew = "300"

  @pam_modified = false
  @ssh_modified = false
  @modified = false

  # advanced krb5.conf settings (pam section)
  @ticket_lifetime = "1d"
  @renew_lifetime = "1d"
  @forwardable = "true"
  @proxiable = "false"
  # obsolete, do not use
  @retain_after_close = "false"
  @ssh_support = false
  @minimum_uid = "1"

  # deprecated at this scope: now present in ExpertSettings map
  @use_shmem = "sshd"
  @mappings = ""

  # --krb5-ignore_unknown_principals for pam-config
  @ignore_unknown = true

  # section in /etc/ssh/ssh_config file for storing krb support
  @ssh_section = "*"

  # packages to install (openssh etc.)
  @packages = []

  # if DNS can be used for retrieving configuration data
  @dns_available = false

  # if DNS is used for retrieving configuration data
  @dns_used = false

  # if sssd is configured, do not use pam_krb5
  @sssd = false

  #   map with the settings configurable in the expert tabs
  @ExpertSettings = {}

  # backup of original ExpertSettings
  @OrigExpertSettings = {}
end

- (Object) Modified

Data was modified?

Returns:

  • true if modified



123
124
125
126
# File '../../src/modules/Kerberos.rb', line 123

def Modified
  Builtins.y2debug("modified=%1", @modified)
  @modified || @pam_modified || @ssh_modified
end

- (Object) Read

Reads Kerberos settings from the SCR

Returns:

  • success



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
# File '../../src/modules/Kerberos.rb', line 296

def Read
  pam_query = Pam.Query("krb5")
  @use_pam_krb = Ops.greater_than(Builtins.size(pam_query), 0)
  if @use_pam_krb # if krb is not enabled, ignore_unknown is true by default
    @ignore_unknown = Builtins.contains(
      Ops.get_list(pam_query, "account", []),
      "ignore_unknown_principals"
    )
  end

  # now read the settings from /etc/krb5.conf
  if FileUtils.Exists("/etc/krb5.conf")
    Builtins.y2debug(
      "krb5.conf sections: %1",
      SCR.Dir(path(".etc.krb5_conf.s"))
    )

    @default_realm = ReadKrb5ConfValue(
      path(".etc.krb5_conf.v.libdefaults.default_realm"),
      ""
    )

    @clockskew = ReadKrb5ConfValue(
      path(".etc.krb5_conf.v.libdefaults.clockskew"),
      "300"
    )

    if Ops.greater_than(Builtins.size(@default_realm), 0)
      realm = Builtins.add(path(".etc.krb5_conf.v"), @default_realm)
      @kdc = Builtins.mergestring(
        ReadKrb5ConfValues(Builtins.add(realm, "kdc"), ""),
        " "
      )
      @admin_server = Builtins.mergestring(
        ReadKrb5ConfValues(Builtins.add(realm, "admin_server"), ""),
        " "
      )
      @default_domain = ReadKrb5ConfValue(
        Builtins.add(realm, "default_domain"),
        ""
      )
    end
    @admin_server = "" if @admin_server == @kdc # we could replace it in Write in this case...

    pam_p = path(".etc.krb5_conf.v.pam")
    @ticket_lifetime = ReadKrb5ConfValue(
      Builtins.add(pam_p, "ticket_lifetime"),
      "1d"
    )
    @renew_lifetime = ReadKrb5ConfValue(
      Builtins.add(pam_p, "renew_lifetime"),
      "1d"
    )
    @forwardable = ReadKrb5ConfValue(
      Builtins.add(pam_p, "forwardable"),
      "true"
    )
    @proxiable = ReadKrb5ConfValue(
      Builtins.add(pam_p, "proxiable"),
      "false"
    )
    @minimum_uid = ReadKrb5ConfValue(
      Builtins.add(pam_p, "minimum_uid"),
      "1"
    )

    Builtins.foreach(
      [
        "keytab",
        "ccache_dir",
        "ccname_template",
        "mappings",
        "existing_ticket",
        "external",
        "validate",
        "use_shmem",
        "addressless",
        "debug",
        "debug_sensitive",
        "initial_prompt",
        "subsequent_prompt",
        "banner"
      ]
    ) do |key|
      val = ReadKrb5ConfValue(Builtins.add(pam_p, key), nil)
      Ops.set(@ExpertSettings, key, val) if val != nil
    end
    if !Builtins.haskey(@ExpertSettings, "use_shmem")
      Ops.set(@ExpertSettings, "use_shmem", "sshd")
    end
    @use_shmem = Ops.get_string(@ExpertSettings, "use_shmem", "sshd")
    if !Builtins.haskey(@ExpertSettings, "external")
      Ops.set(@ExpertSettings, "external", "sshd")
    end

    @OrigExpertSettings = deep_copy(@ExpertSettings)

    @trusted_servers = ReadKrb5ConfValue(
      path(".etc.krb5_conf.v.pkinit.trusted_servers"),
      ""
    )
  else
    SCR.Execute(
      path(".target.bash"),
      Builtins.sformat("/usr/bin/touch /etc/krb5.conf")
    )
  end

  # propose some good values, if there are install defaults
  if @default_domain == ""
    @default_domain = Hostname.CurrentDomain
    # workaround for bug#393951
    if @default_domain == "" && Stage.cont
      out = Convert.to_map(
        SCR.Execute(path(".target.bash_output"), "domainname")
      )
      if Ops.get_integer(out, "exit", 0) == 0
        @default_domain = Builtins.deletechars(
          Ops.get_string(out, "stdout", ""),
          "\n"
        )
      end
    end
  end

  # now, check DNS status (Fate 301812)
  if FileUtils.Exists("/usr/bin/dig") && @default_domain != "" && !Mode.test
    out = Convert.to_map(
      SCR.Execute(
        path(".target.bash_output"),
        Builtins.sformat("dig TXT _kerberos.%1 +short", @default_domain)
      )
    )
    @dns_default_realm = Builtins.deletechars(
      Ops.get_string(out, "stdout", ""),
      "\n\""
    )
    if @dns_default_realm != ""
      out = Convert.to_map(
        SCR.Execute(
          path(".target.bash_output"),
          Builtins.sformat(
            "dig SRV _kerberos._udp.%1 +short",
            @default_domain
          )
        )
      )
      split = Builtins.splitstring(
        Ops.get(
          Builtins.splitstring(Ops.get_string(out, "stdout", ""), "\n"),
          0,
          ""
        ),
        " "
      )
      @dns_kdc = Ops.get_string(split, 3, "")
      if @dns_kdc != "" &&
          Builtins.substring(
            @dns_kdc,
            Ops.subtract(Builtins.size(@dns_kdc), 1),
            1
          ) == "."
        @dns_kdc = Builtins.substring(
          @dns_kdc,
          0,
          Ops.subtract(Builtins.size(@dns_kdc), 1)
        )
      end
      @dns_available = true if @dns_kdc != ""
      # empty domain_realm section and no kdc entry defined and
      # values via DNS are available -> DNS is used
      if @kdc == "" &&
          (!Builtins.contains(
            SCR.Dir(path(".etc.krb5_conf.s")),
            "domain_realm"
          ) ||
            SCR.Dir(path(".etc.krb5_conf.v.domain_realm")) == [])
        @dns_used = true
        @kdc = @dns_kdc
        @default_realm = @dns_default_realm
        Builtins.y2milestone(
          "kdc by DNS %1, default_domain: %2",
          @dns_kdc,
          @dns_default_realm
        )
        Builtins.y2milestone("DNS is used for Kerberos data")
      end
    end
  end

  if (@default_realm == "" || @default_realm == "MY.REALM" ||
      @default_realm == "EXAMPLE.COM") &&
      @default_domain != ""
    @default_realm = Builtins.toupper(@default_domain)
  end
  if (@kdc == "" || @kdc == "MY.COMPUTER" || @kdc == "kerberos.example.com") &&
      FileUtils.Exists("/usr/bin/ypwhich")
    out = Convert.to_map(
      SCR.Execute(path(".target.bash_output"), "/usr/bin/ypwhich")
    )
    @kdc = Builtins.deletechars(Ops.get_string(out, "stdout", ""), "\n")
  end
  if (@kdc == "" || @kdc == "MY.COMPUTER" || @kdc == "kerberos.example.com") &&
      FileUtils.Exists("/usr/bin/host")
    proposed = Ops.add("kdc.", Hostname.CurrentDomain)
    m = Convert.to_map(
      SCR.Execute(
        path(".target.bash_output"),
        Builtins.sformat(
          "LANG=C /usr/bin/host %1 | /bin/grep address",
          proposed
        )
      )
    )
    @kdc = proposed if Ops.get_integer(m, "exit", 1) == 0
    Builtins.y2milestone("no kdc defined, proposing: %1", @kdc)
  end

  # read ssh support
  Builtins.y2debug(
    "ssh_config sections: %1",
    SCR.Dir(path(".etc.ssh.ssh_config.s"))
  )
  hostname = Hostname.CurrentHostname

  @ssh_support = nil
  Builtins.foreach(SCR.Dir(path(".etc.ssh.ssh_config.s"))) do |sec|
    # according to ssh man page, first value is taken:
    next if @ssh_support != nil
    cont = SCR.Dir(Builtins.add(path(".etc.ssh.ssh_config.v"), sec))
    Builtins.y2debug("section %1 contains: %2", sec, cont)
    if (sec == "*" || sec == hostname) &&
        Builtins.contains(cont, "GSSAPIAuthentication") &&
          Builtins.contains(cont, "GSSAPIDelegateCredentials")
      @ssh_support = SCR.Read(
        Builtins.add(
          Builtins.add(path(".etc.ssh.ssh_config.v"), sec),
          "GSSAPIAuthentication"
        )
      ) == "yes" &&
        SCR.Read(
          Builtins.add(
            Builtins.add(path(".etc.ssh.ssh_config.v"), sec),
            "GSSAPIDelegateCredentials"
          )
        ) == "yes"
      @ssh_section = sec
    end
  end
  @ssh_support = false if @ssh_support == nil

  @sssd = Pam.Enabled("sss")

  if @sssd && FileUtils.Exists("/etc/sssd/sssd.conf")
    # read kerberos settings from sssd.conf (if available)
    @default_realm = ReadSSSDValue("krb5_realm", @default_realm)
    @kdc = ReadSSSDValue("krb5_server", @kdc)
    Ops.set(
      @ExpertSettings,
      "ccache_dir",
      ReadSSSDValue(
        "krb5_ccachedir",
        Ops.get_string(@ExpertSettings, "ccache_dir", "")
      )
    )
    Ops.set(
      @ExpertSettings,
      "ccname_template",
      ReadSSSDValue(
        "krb5_ccname_template",
        Ops.get_string(@ExpertSettings, "ccname_template", "")
      )
    )
    Ops.set(
      @ExpertSettings,
      "keytab",
      ReadSSSDValue(
        "krb5_keytab",
        Ops.get_string(@ExpertSettings, "keytab", "")
      )
    )
    @renew_lifetime = ReadSSSDValue(
      "krb5_renewable_lifetime",
      @renew_lifetime
    )
    @ticket_lifetime = ReadSSSDValue("krb5_lifetime", @ticket_lifetime)
    Ops.set(
      @ExpertSettings,
      "validate",
      Builtins.tolower(
        ReadSSSDValue(
          "krb5_validate",
          Ops.get_string(@ExpertSettings, "validate", "")
        )
      )
    )
  end
  true
end

- (Object) ReadFile(path_to_value, def_value)

Deprecated.

Deprecated variant to ReadKrb5ConfValue



233
234
235
236
237
238
# File '../../src/modules/Kerberos.rb', line 233

def ReadFile(path_to_value, def_value)
  Builtins.y2warning(
    "This function is deprecated, use ReadKrb5ConfValue instead."
  )
  ReadKrb5ConfValue(path_to_value, def_value)
end

- (String) ReadKrb5ConfValue(path_to_value, def_value)

Reads the item value from the /etc/krb5.conf via ini agent If the item doesn't exist, returns the default value

Parameters:

  • path_to_value (Yast::Path)

    path for agent (.etc.krb5_conf)

  • def_value (String)

    default value for the key (path)

Returns:

  • (String)

    the value



226
227
228
229
# File '../../src/modules/Kerberos.rb', line 226

def ReadKrb5ConfValue(path_to_value, def_value)
  vals = ReadKrb5ConfValues(path_to_value, def_value)
  Ops.get_string(vals, 0, def_value)
end

- (Array) ReadKrb5ConfValues(path_to_value, def_value)

Reads the item values from the /etc/krb5.conf via ini agent If the item doesn't exist, returns the default value

Parameters:

  • path_to_value (Yast::Path)

    path for agent (.etc.krb5_conf)

  • def_value (String)

    default value for the key (path)

Returns:

  • (Array)

    string the values for given key



211
212
213
214
215
216
217
218
219
# File '../../src/modules/Kerberos.rb', line 211

def ReadKrb5ConfValues(path_to_value, def_value)
  value = Convert.convert(
    SCR.Read(path_to_value),
    :from => "any",
    :to   => "list <string>"
  )
  value = [def_value] if value == nil
  deep_copy(value)
end

- (Object) ReadSSSDValue(key, default_value)

Read given value from /etc/sssd/sssd.conf

Parameters:

  • default_value (String)

    default, if not found in the file



280
281
282
283
284
285
286
287
288
289
290
291
292
# File '../../src/modules/Kerberos.rb', line 280

def ReadSSSDValue(key, default_value)
  ret = default_value
  val = Convert.to_string(
    SCR.Read(
      Builtins.add(
        Builtins.add(path(".etc.sssd_conf.v"), "domain/default"),
        key
      )
    )
  )
  ret = val if val != nil
  ret
end

- (Object) RequiredPackages

Return the list of packages for kerberos configuration



1030
1031
1032
1033
1034
1035
# File '../../src/modules/Kerberos.rb', line 1030

def RequiredPackages
  pkgs = deep_copy(@required_packages)
  # do not install pam_krb5 if sssd is configured
  pkgs = Builtins.filter(pkgs) { |p| p != "pam_krb5" } if @sssd
  deep_copy(pkgs)
end

- (Object) ShortSummary

Create a short textual summary

Returns:

  • summary of the current configuration



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
# File '../../src/modules/Kerberos.rb', line 985

def ShortSummary
  summary = ""
  nc = Summary.NotConfigured
  # summary text, %1 is value
  summary = Ops.add(
    Ops.add(
      Ops.add(
        Builtins.sformat(
          _("<b>KDC Server</b>: %1<br>"),
          @kdc != "" ? @kdc : nc
        ),
        # summary text, %1 is value
        Builtins.sformat(
          _("<b>Default Domain</b>: %1<br>"),
          @default_domain != "" ? @default_domain : nc
        )
      ),
      # summary text, %1 is value
      Builtins.sformat(
        _("<b>Default Realm</b>: %1<br>"),
        @default_realm != "" ? @default_realm : nc
      )
    ),
    # summary text (yes/no follows)
    Builtins.sformat(
      _("<b>Kerberos Authentication Enabled</b>: %1"),
      @use_pam_krb ?
        # summary value
        _("Yes") :
        # summary value
        _("No")
    )
  )
  if @dns_used
    # summary line
    summary = Ops.add(
      Ops.add(summary, "<br>"),
      _("Configuration Acquired via DNS")
    )
  end

  summary
end

- (Object) Summary

Create a textual summary

Returns:

  • summary of the current configuration



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
# File '../../src/modules/Kerberos.rb', line 943

def Summary
  summary = ""
  nc = Summary.NotConfigured
  # summary header
  summary = Summary.AddHeader(summary, _("PAM Login"))

  # summary item
  summary = Summary.AddLine(
    summary,
    @use_pam_krb ?
      _("Use Kerberos") :
      # summary item
      _("Do Not Use Kerberos")
  )

  # summary header
  summary = Summary.AddHeader(summary, _("Default Realm"))
  summary = Summary.AddLine(
    summary,
    @default_realm != "" ? @default_realm : nc
  )

  # summary header
  summary = Summary.AddHeader(summary, _("Default Domain"))
  summary = Summary.AddLine(
    summary,
    @default_domain != "" ? @default_domain : nc
  )

  # summary header
  summary = Summary.AddHeader(summary, _("KDC Server Address"))
  summary = Summary.AddLine(summary, @kdc != "" ? @kdc : nc)

  # summary header
  summary = Summary.AddHeader(summary, _("Clock Skew"))
  summary = Summary.AddLine(summary, @clockskew != "" ? @clockskew : nc)

  [summary, []]
end

- (Object) ValidateTimeEntries(key, val)

Validation function for time-related values



1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
# File '../../src/modules/Kerberos.rb', line 1045

def ValidateTimeEntries(key, val)
  if !Builtins.regexpmatch(val, "^([0-9]+)[dmh]$") &&
      !Builtins.regexpmatch(val, "^([0-9]+)$")
    if key == "clockskew"
      # error popup (wrong format of entered value)
      Report.Error(_("Clock skew is invalid.\nTry again.\n"))
    else
      # error popup (wrong format of entered value)
      Report.Error(_("Lifetime is invalid.\nTry again."))
    end
    return false
  end
  true
end

- (Object) Write

Saves Kerberos configuration. (No parameters because it is too short to abort)

Returns:

  • true on success



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
# File '../../src/modules/Kerberos.rb', line 645

def Write
  pam_installed = false
  ret = true

  # dialog caption
  caption = _("Saving Kerberos Client Configuration")

  no_stages = 3
  stages = [
    # progress stage label
    _("Write PAM settings"),
    # progress stage label
    _("Write Kerberos client settings"),
    # progress stage label
    _("Write OpenSSH settings")
  ]
  steps = [
    # progress step label
    _("Writing PAM settings..."),
    # progress step label
    _("Writing Kerberos client settings..."),
    # progress step label
    _("Writing OpenSSH settings..."),
    # final progress step label
    _("Finished")
  ]
  if @packages != []
    # progress stage label
    stages = Builtins.prepend(stages, _("Install required packages"))
    # progress step label
    steps = Builtins.prepend(steps, _("Installing required packages..."))
    no_stages = Ops.add(no_stages, 1)
  end

  Progress.New(caption, " ", no_stages, stages, steps, "")

  if @packages != []
    Builtins.y2debug("packages to install: %1", @packages)
    Progress.NextStage
    to_install = []
    # check if packages are avialable...
    Builtins.foreach(@packages) do |p|
      if Package.Available(p) == true
        to_install = Builtins.add(to_install, p)
      end
    end
    Package.DoInstallAndRemove(to_install, [])

    @packages = []
  end

  Progress.NextStage

  # -- pam settings
  if @pam_modified || @write_only
    # whem sssd is configured, do not use pam_krb5 and update sssd.conf
    # fate#308902
    if @sssd
      Builtins.y2milestone("not using pam_krb5 because sssd is configured")
      Pam.Remove("krb5")
    elsif @use_pam_krb
      Pam.Add("krb5")
      # If ldap is configured we need to change it to ldap-account_only
      Pam.Add("ldap-account_only") if Pam.Enabled("ldap")
      if @ignore_unknown
        Pam.Add("krb5-ignore_unknown_principals")
      else
        Pam.Remove("krb5-ignore_unknown_principals")
      end
    else
      # if ldap-account_only is used we need to change it to ldap
      Pam.Add("ldap") if Pam.Enabled("ldap-account_only")
      Pam.Remove("krb5")
    end
  end

  # -- write to /etc/krb5.conf
  Progress.NextStage

  if @modified && !@dns_used
    # change the default realm name
    WriteKrb5ConfValue(
      path(".etc.krb5_conf.v.libdefaults.default_realm"),
      @default_realm
    )

    # write the mapping domain-realm
    if @default_domain != ""
      domain = @default_domain
      if Builtins.findfirstof(domain, ".") != 0
        domain = Ops.add(".", domain)
      end
      WriteKrb5ConfValue(
        Builtins.add(path(".etc.krb5_conf.v.domain_realm"), domain),
        @default_realm
      )
    end

    WriteKrb5ConfValue(
      path(".etc.krb5_conf.v.libdefaults.clockskew"),
      @clockskew
    )

    if Builtins.contains(SCR.Dir(path(".etc.krb5_conf.s")), @default_realm)
      # update the default realm settings
      WriteKrb5ConfValuesAsString(
        Builtins.add(
          Builtins.add(path(".etc.krb5_conf.v"), @default_realm),
          "kdc"
        ),
        @kdc
      )
      if @default_domain != "" && @default_domain != nil
        WriteKrb5ConfValue(
          Builtins.add(
            Builtins.add(path(".etc.krb5_conf.v"), @default_realm),
            "default_domain"
          ),
          @default_domain
        )
      end
      if @admin_server == ""
        # save only when the entry was mising or same as KDC
        WriteKrb5ConfValuesAsString(
          Builtins.add(
            Builtins.add(path(".etc.krb5_conf.v"), @default_realm),
            "admin_server"
          ),
          @kdc
        )
      end
    elsif @default_realm != ""
      # specify the type of this subsection
      SCR.Write(
        Builtins.add(path(".etc.krb5_conf.st.realms"), @default_realm),
        [1]
      )
      # write the settings of the new default realm
      WriteKrb5ConfValuesAsString(
        Builtins.add(
          Builtins.add(path(".etc.krb5_conf.v.realms"), @default_realm),
          "kdc"
        ),
        @kdc
      )
      if @default_domain != "" && @default_domain != nil
        WriteKrb5ConfValue(
          Builtins.add(
            Builtins.add(path(".etc.krb5_conf.v.realms"), @default_realm),
            "default_domain"
          ),
          @default_domain
        )
      end
      if @admin_server == ""
        WriteKrb5ConfValuesAsString(
          Builtins.add(
            Builtins.add(path(".etc.krb5_conf.v.realms"), @default_realm),
            "admin_server"
          ),
          @kdc
        )
      end
    end
  end
  if @modified
    WriteSSSD() if @sssd

    #     3. Yes, if the user chooses DNS you need to remove the domain_realm
    #     section (so that the domain->realm mapping can be read through DNS)
    #     and at least the complete sub-section describing the realm
    #     (maybe even the whole [realms]-section).
    if @dns_used
      Builtins.y2milestone(
        "DNS set to use: removing domain info from krb5.conf"
      )
      WriteKrb5ConfValue(path(".etc.krb5_conf.s.domain_realm"), nil)
      WriteKrb5ConfValue(
        Builtins.add(path(".etc.krb5_conf.s"), @default_realm),
        nil
      )
      # write the default realm name
      WriteKrb5ConfValue(
        path(".etc.krb5_conf.v.libdefaults.default_realm"),
        @default_realm
      )
    end

    # write advanced settings
    pam_sect = path(".etc.krb5_conf.v.pam")
    if !Builtins.contains(SCR.Dir(path(".etc.krb5_conf.s")), "pam")
      # specify the type of new subsection
      SCR.Write(path(".etc.krb5_conf.st.appdefaults.pam"), [1])
      pam_sect = path(".etc.krb5_conf.v.appdefaults.pam")
    end

    WriteKrb5ConfValue(
      Builtins.add(pam_sect, "ticket_lifetime"),
      @ticket_lifetime
    )
    WriteKrb5ConfValue(
      Builtins.add(pam_sect, "renew_lifetime"),
      @renew_lifetime
    )
    WriteKrb5ConfValue(Builtins.add(pam_sect, "forwardable"), @forwardable)
    WriteKrb5ConfValue(Builtins.add(pam_sect, "proxiable"), @proxiable)
    WriteKrb5ConfValue(Builtins.add(pam_sect, "minimum_uid"), @minimum_uid)

    Builtins.foreach(@ExpertSettings) do |key, value|
      pth = Builtins.add(pam_sect, key)
      if Ops.is_boolean?(value)
        WriteKrb5ConfValue(pth, value == true ? "true" : "false")
        next
      end
      # rest is string
      if value != ""
        WriteKrb5ConfValue(pth, Convert.to_string(value))
      # removin
      elsif Ops.get_string(@OrigExpertSettings, key, "") != ""
        WriteKrb5ConfValue(pth, nil)
      end
    end

    if @trusted_servers != "" &&
        Package.Installed("krb5-plugin-preauth-pkinit-nss")
      pkinit_sect = path(".etc.krb5_conf.v.pkinit")
      if !Builtins.contains(SCR.Dir(path(".etc.krb5_conf.s")), "pkinit")
        SCR.Write(path(".etc.krb5_conf.st.appdefaults.pkinit"), [1])
        pkinit_sect = path(".etc.krb5_conf.v.appdefaults.pkinit")
      end
      WriteKrb5ConfValue(
        Builtins.add(pkinit_sect, "trusted_servers"),
        @trusted_servers
      )
      if FileUtils.Exists("/etc/pam_pkcs11/pam_pkcs11.conf")
        SCR.Write(
          Builtins.add(
            Builtins.add(
              path(".etc.pam_pkcs11_conf.v.pam_pkcs11"),
              "mapper ms"
            ),
            "domainname"
          ),
          @default_realm
        )
        SCR.Write(
          Builtins.add(
            Builtins.add(
              path(".etc.pam_pkcs11_conf.v.pam_pkcs11"),
              "mapper ms"
            ),
            "domainnickname"
          ),
          @default_domain
        )
        SCR.Write(path(".etc.pam_pkcs11_conf"), nil)
      end
    end

    # write the changes now
    SCR.Write(path(".etc.krb5_conf"), nil)

    # unmount agent; otherwise it won't be available to read new created
    # sections (it will treat DEFAULT_REALM as a subsection of [realms])
    SCR.UnmountAgent(path(".etc.krb5_conf"))
  end

  # -- write openssh settings
  Progress.NextStage

  if @ssh_modified
    write = @ssh_support ? "yes" : "no"
    SCR.Write(
      Builtins.add(
        Builtins.add(path(".etc.ssh.ssh_config.v"), @ssh_section),
        "GSSAPIAuthentication"
      ),
      write
    )
    SCR.Write(
      Builtins.add(
        Builtins.add(path(".etc.ssh.ssh_config.v"), @ssh_section),
        "GSSAPIDelegateCredentials"
      ),
      write
    )
    SCR.Write(path(".etc.ssh.ssh_config"), nil)
    Builtins.y2milestone("/etc/ssh/ssh_config modified")
  end

  # final stage
  Progress.NextStage

  ret
end

- (Object) WriteFile(path_to_value, value)

Deprecated.

Deprecated variant to WriteKrb5ConfValue



271
272
273
274
275
276
# File '../../src/modules/Kerberos.rb', line 271

def WriteFile(path_to_value, value)
  Builtins.y2warning(
    "This function is deprecated, use WriteKrb5ConfValue instead."
  )
  WriteKrb5ConfValue(path_to_value, value)
end

- (Object) WriteKrb5ConfValue(path_to_value, value)

Write the item value to /etc/krb5.conf Do not write anything for empty and nil values

Parameters:

  • path_to_value (Yast::Path)

    path for agent (.etc.krb5_conf)

  • value (String)

Returns:

  • false when nothing was written, success of write otherwise



264
265
266
267
# File '../../src/modules/Kerberos.rb', line 264

def WriteKrb5ConfValue(path_to_value, value)
  return SCR.Write(path_to_value, nil) if value == nil || value == ""
  WriteKrb5ConfValues(path_to_value, [value])
end

- (Object) WriteKrb5ConfValues(path_to_value, values)

Write list of values for given key to /etc/krb5.conf Do not write anything for empty and nil values

Parameters:

  • path_to_value (Yast::Path)

    path for agent (.etc.krb5_conf)

  • value

Returns:

  • false when nothing was written, success of write otherwise



245
246
247
248
249
# File '../../src/modules/Kerberos.rb', line 245

def WriteKrb5ConfValues(path_to_value, values)
  values = deep_copy(values)
  return SCR.Write(path_to_value, nil) if values == nil || values == []
  SCR.Write(path_to_value, values)
end

- (Object) WriteKrb5ConfValuesAsString(path_to_value, values)

Write (possible) multiple values of given key to /etc/krb5.conf

Parameters:

  • values (String)

    values separated by spaces



253
254
255
256
257
258
# File '../../src/modules/Kerberos.rb', line 253

def WriteKrb5ConfValuesAsString(path_to_value, values)
  WriteKrb5ConfValues(
    path_to_value,
    Builtins.filter(Builtins.splitstring(values, " \t")) { |val| val != "" }
  )
end

- (Object) WriteSSSD

Write Kerberos related settings to sssd.conf



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
# File '../../src/modules/Kerberos.rb', line 597

def WriteSSSD
  Builtins.y2milestone("updating sssd.conf with new kerberos values")

  domain = Builtins.add(path(".etc.sssd_conf.v"), "domain/default")

  SCR.Write(Builtins.add(domain, "auth_provider"), "krb5")
  SCR.Write(Builtins.add(domain, "chpass_provider"), "krb5")
  SCR.Write(Builtins.add(domain, "krb5_realm"), @default_realm)
  # divide by commas: krb5_server = kdcserver1, kdcserver2 (bnc#729174)
  SCR.Write(Builtins.add(domain, "krb5_server"), @kdc.gsub(/\s+/, ","))

  # write expert settings (bnc#778513)
  SCR.Write(
    Builtins.add(domain, "krb5_ccachedir"),
    Ops.get_string(@ExpertSettings, "ccache_dir", "") == "" ?
      nil :
      Ops.get_string(@ExpertSettings, "ccache_dir", "")
  )
  SCR.Write(
    Builtins.add(domain, "krb5_ccname_template"),
    Ops.get_string(@ExpertSettings, "ccname_template", "") == "" ?
      nil :
      Ops.get_string(@ExpertSettings, "ccname_template", "")
  )
  SCR.Write(
    Builtins.add(domain, "krb5_validate"),
    Ops.get_string(@ExpertSettings, "validate", "") == "true" ? "True" : "False"
  )
  SCR.Write(
    Builtins.add(domain, "krb5_keytab"),
    Ops.get_string(@ExpertSettings, "keytab", "") == "" ?
      nil :
      Ops.get_string(@ExpertSettings, "keytab", "")
  )
  SCR.Write(
    Builtins.add(domain, "krb5_renewable_lifetime"),
    @renew_lifetime
  )
  SCR.Write(Builtins.add(domain, "krb5_lifetime"), @ticket_lifetime)

  ret = SCR.Write(path(".etc.sssd_conf"), nil)
  Builtins.y2error("error writing sssd.conf file") if !ret
  ret
end