Class List Method List File List

# Class: Yast::SecurityClass

Inherits:
  Module
  - Object
  - Module
  - Yast::SecurityClass
  show all
Defined in:
  ../../src/modules/Security.rb

## Instance Method Summary (collapse)

- - (Object) Abort

  Abort function.

- - (Hash) Export

  Dump the security settings to a single map (For use by autoinstallation.).

- - (Object) ExtraServices(runlevel)
- - (Boolean) GetModified

  Function which returns if the settings were modified.

- - (Boolean) Import(settings)

  Get all security settings from the first parameter (For use by autoinstallation.).

- - (Object) main
- - (Object) MissingMandatoryServices(runlevel)

  return list of missing mandatory services in a runlevel.

- - (Object) Modified

  Data was modified?.

- - (Object) Overview

  Create an overview table with all configured cards.

- - (Object) PollAbort

  Check for pending Abort press.

- - (Object) Read

  Read all security settings.

- - (Object) ReadConsoleShutdown

  Read the information about ctrl+alt+del behavior See bug 742783 for description.

- - (Object) ReadServiceSettings
- - (Object) SetModified
- - (Object) Summary

  Create a textual summary and a list of unconfigured cards.

- - (Object) Write

  Write all security settings.

- - (Object) WriteConsoleShutdown(ca)

  Write the value of ctrl-alt-delete behavior.

## Instance Method Details

### - (`Object`) Abort

Abort function

Returns:

- blah blah lahjk

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    # File '../../src/modules/Security.rb', line 350

    def Abort
      return Builtins.eval(@AbortFunction) == true if @AbortFunction != nil
      false
    end

### - (`Hash`) Export

Dump the security settings to a single map (For use by autoinstallation.)

Returns:

- (`Hash`) —

  Dumped settings (later acceptable by Import ())

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    # File '../../src/modules/Security.rb', line 883

    def Export
      Builtins.eval(@Settings)
    end

### - (`Object`) ExtraServices(runlevel)

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    # File '../../src/modules/Security.rb', line 312

    def ExtraServices(runlevel)
      Builtins.y2milestone(
        "Searching for extra services in runlevel %1",
        runlevel
      )

      extra_services = []
      enabled_services = Service.EnabledServices(runlevel)

      return nil if enabled_services == nil

      Builtins.foreach(enabled_services) do |service|
        # the extra service is not mandatory and it's not optional
        extra = !Builtins.contains(
          Builtins.flatten(@mandatory_services),
          service
        ) &&
          !Builtins.contains(@optional_services, service)
        if extra
          Builtins.y2milestone("Found extra service: %1", service)
          extra_services = Builtins.add(extra_services, service)
        end
      end

      Builtins.y2milestone("All extra services: %1", extra_services)

      deep_copy(extra_services)
    end

### - (`Boolean`) GetModified

Function which returns if the settings were modified

Returns:

- (`Boolean`) —

  settings were modified

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    # File '../../src/modules/Security.rb', line 358

    def GetModified
      @modified
    end

### - (`Boolean`) Import(settings)

Get all security settings from the first parameter (For use by autoinstallation.)

Parameters:

- settings (`Hash`) —

  The YCP structure to be imported.

Returns:

- (`Boolean`) —

  True on success

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    # File '../../src/modules/Security.rb', line 837

    def Import(settings)
      settings = deep_copy(settings)
      return true if settings == {}

      @modified = true
      tmpSettings = {}
      Builtins.foreach(@Settings) do |k, v|
        if !Builtins.haskey(settings, k)
          if Builtins.haskey(@sysctl, k) &&
              Builtins.haskey(settings, Ops.get(@sysctl2sysconfig, k, ""))
            val = Ops.get_string(
              settings,
              Ops.get(@sysctl2sysconfig, k, ""),
              ""
            )
            if val == "yes"
              Ops.set(tmpSettings, k, "1")
            elsif val == "no"
              Ops.set(tmpSettings, k, "0")
            else
              Ops.set(tmpSettings, k, val)
            end
          elsif Builtins.haskey(settings, Ops.get(@obsolete_login_defs, k, ""))
            Ops.set(
              tmpSettings,
              k,
              Ops.get_string(settings, Ops.get(@obsolete_login_defs, k, ""), "")
            )
          else
            Ops.set(tmpSettings, k, v)
          end
        else
          Ops.set(tmpSettings, k, Ops.get_string(settings, k, ""))
        end
      end
      @Settings = Convert.convert(
        Builtins.eval(tmpSettings),
        :from => "map",
        :to   => "map <string, string>"
      )
      true
    end

### - (`Object`) main

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    # File '../../src/modules/Security.rb', line 32

    def main
      Yast.import "UI"
      textdomain "security"

      Yast.import "FileUtils"
      Yast.import "Package"
      Yast.import "Pam"
      Yast.import "Progress"
      Yast.import "Service"

      Yast.include self, "security/levels.rb"

      # services to check - these must be running
      # meaning [ [ || ] && && ]
      @mandatory_services = [
        ["ntp"],
        ["syslog"],
        ["auditd"],
        ["random"],
        ["kbd"],
        ["cron"],
        ["postfix", "sendmail"]
      ]
      # sevices to check - these can be ignored (if they are running it's OK)
      @optional_services = [
        "acpid",
        "boot.clock",
        "dbus",
        "ealysyslog",
        "fbset",
        "framebufferset",
        "isdn",
        "microcode.ctl",
        "random",
        "consolekit",
        "haldaemon",
        "network",
        "syslog",
        "auditd",
        "splash_early",
        "alsasound",
        "irq_balancer",
        "kbd",
        "powersaved",
        "splash",
        "sshd",
        "earlyxdm",
        "hotkey-setup",
        "atd",
        "nscd",
        "smpppd",
        "xend",
        "autofs",
        "libvirtd",
        "sendmail",
        "postfix",
        "xendomains",
        "cron",
        "ddclient",
        "smartd",
        "stopblktrace",
        "ntp",
        "SuSEfirewall",
        "earlysyslog"
      ]
      # All other services should be turned off

      # systemd target, defining ctrl-alt-del behavior
      @ctrl_alt_del_file = "/etc/systemd/system/ctrl-alt-del.target"

      # encryption methods supported by pam_unix (bnc#802006)
      @encryption_methods = ["des", "md5", "sha256", "sha512"]

      # All security settings
      @Settings = {
        "CONSOLE_SHUTDOWN"                          => "reboot",
        "CRACKLIB_DICT_PATH"                        => "/usr/lib/cracklib_dict",
        "CWD_IN_ROOT_PATH"                          => "yes",
        "CWD_IN_USER_PATH"                          => "yes",
        "DISPLAYMANAGER_REMOTE_ACCESS"              => "no",
        "kernel.sysrq"                              => "0",
        "net.ipv4.tcp_syncookies"                   => "1",
        "net.ipv4.ip_forward"                       => "0",
        "net.ipv6.conf.all.forwarding"              => "0",
        "FAIL_DELAY"                                => "3",
        "GID_MAX"                                   => "60000",
        "GID_MIN"                                   => "1000",
        "DISPLAYMANAGER_SHUTDOWN"                   => "all",
        "HIBERNATE_SYSTEM"                          => "active_console",
        "PASSWD_ENCRYPTION"                         => "sha512",
        "PASSWD_USE_CRACKLIB"                       => "yes",
        "PASS_MAX_DAYS"                             => "99999",
        "PASS_MIN_DAYS"                             => "0",
        "PASS_MIN_LEN"                              => "5",
        "PASS_WARN_AGE"                             => "7",
        "PERMISSION_SECURITY"                       => "secure",
        "DISABLE_RESTART_ON_UPDATE"                 => "no",
        "DISABLE_STOP_ON_REMOVAL"                   => "no",
        "RUN_UPDATEDB_AS"                           => "nobody",
        "UID_MAX"                                   => "60000",
        "UID_MIN"                                   => "500",
        "SYS_UID_MAX"                               => "499",
        "SYS_UID_MIN"                               => "100",
        "SYS_GID_MAX"                               => "499",
        "SYS_GID_MIN"                               => "100",
        "USERADD_CMD"                               => "/usr/sbin/useradd.local",
        "USERDEL_PRECMD"                            => "/usr/sbin/userdel-pre.local",
        "USERDEL_POSTCMD"                           => "/usr/sbin/userdel-post.local",
        "PASSWD_REMEMBER_HISTORY"                   => "0",
        "SYSTOHC"                                   => "yes",
        "SYSLOG_ON_NO_ERROR"                        => "yes",
        "DISPLAYMANAGER_ROOT_LOGIN_REMOTE"          => "no",
        "DISPLAYMANAGER_XSERVER_TCP_PORT_6000_OPEN" => "no",
        "SMTPD_LISTEN_REMOTE"                       => "no",
        "RUNLEVEL3_MANDATORY_SERVICES"              => "yes",
        "RUNLEVEL5_MANDATORY_SERVICES"              => "yes",
        "RUNLEVEL3_EXTRA_SERVICES"                  => "no",
        "RUNLEVEL5_EXTRA_SERVICES"                  => "no"
      }

      # the original settings
      @Settings_bak = deep_copy(@Settings)

      # keys that should not be tested against predefined levels:
      # - RUNLEVEL*_SERVICES have different syntax, are not saved in current form
      @do_not_test = [
        "RUNLEVEL3_MANDATORY_SERVICES",
        "RUNLEVEL5_MANDATORY_SERVICES",
        "RUNLEVEL3_EXTRA_SERVICES",
        "RUNLEVEL5_EXTRA_SERVICES"
      ]

      # Security settings locations
      @Locations = {
        ".etc.login_defs"           => [
          "FAIL_DELAY",
          "GID_MAX",
          "GID_MIN",
          "PASS_MAX_DAYS",
          "PASS_MIN_DAYS",
          "PASS_WARN_AGE",
          "UID_MAX",
          "UID_MIN",
          "SYS_UID_MAX",
          "SYS_UID_MIN",
          "SYS_GID_MAX",
          "SYS_GID_MIN",
          "USERADD_CMD",
          "USERDEL_PRECMD",
          "USERDEL_POSTCMD"
        ],
        ".sysconfig.suseconfig"     => ["CWD_IN_ROOT_PATH", "CWD_IN_USER_PATH"],
        ".sysconfig.displaymanager" => [
          "DISPLAYMANAGER_REMOTE_ACCESS",
          "DISPLAYMANAGER_ROOT_LOGIN_REMOTE",
          "DISPLAYMANAGER_XSERVER_TCP_PORT_6000_OPEN",
          "DISPLAYMANAGER_SHUTDOWN"
        ],
        ".sysconfig.security"       => ["PERMISSION_SECURITY"],
        ".sysconfig.services"       => [
          "DISABLE_RESTART_ON_UPDATE",
          "DISABLE_STOP_ON_REMOVAL"
        ],
        ".sysconfig.locate"         => ["RUN_UPDATEDB_AS"],
        ".sysconfig.clock"          => ["SYSTOHC"],
        ".sysconfig.cron"           => ["SYSLOG_ON_NO_ERROR"],
        ".sysconfig.mail"           => ["SMTPD_LISTEN_REMOTE"]
      }

      # Default values for /etc/sysctl.conf keys
      @sysctl = {
        "kernel.sysrq"                 => "0",
        "net.ipv4.tcp_syncookies"      => "1",
        "net.ipv4.ip_forward"          => "0",
        "net.ipv6.conf.all.forwarding" => "0"
      }

      # Mapping of /etc/sysctl.conf keys to old (obsoleted) sysconfig ones
      # (used during autoYaST import
      @sysctl2sysconfig = {
        "kernel.sysrq"                 => "ENABLE_SYSRQ",
        "net.ipv4.tcp_syncookies"      => "IP_TCP_SYNCOOKIES",
        "net.ipv4.ip_forward"          => "IP_FORWARD",
        "net.ipv6.conf.all.forwarding" => "IPV6_FORWARD"
      }

      # Mapping of /etc/login.defs keys to old (obsoleted) ones
      # (used during autoYaST import)
      @obsolete_login_defs = {
        "SYS_UID_MAX" => "SYSTEM_UID_MAX",
        "SYS_UID_MIN" => "SYSTEM_UID_MIN",
        "SYS_GID_MAX" => "SYSTEM_GID_MAX",
        "SYS_GID_MIN" => "SYSTEM_GID_MIN"
      }

      # mapping of internal YaST values to values needed for
      # org.freedesktop.upower.hibernate privilege
      @ycp2polkit = {
        "active_console" => "auth_admin:auth_admin:yes",
        "auth_admin"     => "auth_admin:auth_admin:auth_admin",
        "anyone"         => "yes:yes:yes"
      }

      # Remaining settings:
      # - CONSOLE_SHUTDOWN (/etc/inittab)
      # - PASSWD_ENCRYPTION (/etc/pam?)
      # - RUNLEVEL3_MANDATORY_SERVICES
      # - RUNLEVEL5_MANDATORY_SERVICES
      # - RUNLEVEL3_EXTRA_SERVICES
      # - RUNLEVEL5_EXTRA_SERVICES

      # Number of sigificant characters in the password
      @PasswordMaxLengths = {
        "des"    => 8,
        "md5"    => 127,
        "sha256" => 127,
        "sha512" => 127
      }

      # Abort function
      # return boolean return true if abort
      @AbortFunction = nil

      # Data was modified?
      @modified = false

      @proposal_valid = false
      @write_only = false

      @activation_mapping = {
        "SYSLOG_ON_NO_ERROR"           => "/etc/init.d/boot.clock start",
        "DHCPD_RUN_CHROOTED"           => "/etc/init.d/dhcpd restart",
        "DHCPD_RUN_AS"                 => "/etc/init.d/dhcpd restart",
        # restart sendmail or postfix - whatever is installed
        "SMTPD_LISTEN_REMOTE"          => "(test -e /etc/init.d/sendmail && VERBOSE=false /usr/lib/sendmail.d/update && /etc/init.d/sendmail restart) || (test -e /etc/init.d/postfix && /usr/sbin/SuSEconfig.postfix && /etc/init.d/postfix restart)",
        "net.ipv4.tcp_syncookies"      => "/etc/init.d/boot.ipconfig start",
        "net.ipv4.ip_forward"          => "/etc/init.d/boot.ipconfig start",
        "net.ipv6.conf.all.forwarding" => "/etc/init.d/boot.ipconfig start"
      }
    end

### - (`Object`) MissingMandatoryServices(runlevel)

return list of missing mandatory services in a runlevel

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    # File '../../src/modules/Security.rb', line 276

    def MissingMandatoryServices(runlevel)
      Builtins.y2milestone(
        "Checking mandatory services in runlevel %1",
        runlevel
      )

      ret = []
      enabled_services = Service.EnabledServices(runlevel)

      Builtins.y2milestone("enabled_services: %1", enabled_services)

      return nil if enabled_services == nil

      Builtins.foreach(@mandatory_services) do |services|
        enabled = false
        Builtins.foreach(services) do |service|
          enabled = enabled || Builtins.contains(enabled_services, service)
        end
        Builtins.y2milestone(
          "Mandatory services %1 are enabled: %2",
          services,
          enabled
        )
        ret = Builtins.add(ret, services) if !enabled
      end

      Builtins.y2milestone(
        "Missing mandatory services in runlevel %1: %2",
        runlevel,
        ret
      )

      deep_copy(ret)
    end

### - (`Object`) Modified

Data was modified?

Returns:

- true if modified

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    # File '../../src/modules/Security.rb', line 374

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

### - (`Object`) Overview

Create an overview table with all configured cards

Returns:

- table items

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    # File '../../src/modules/Security.rb', line 918

    def Overview
      []
    end

### - (`Object`) PollAbort

Check for pending Abort press

Returns:

- true if pending abort

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    # File '../../src/modules/Security.rb', line 344

    def PollAbort
      UI.PollInput == :abort
    end

### - (`Object`) Read

Read all security settings

Returns:

- true on success

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    # File '../../src/modules/Security.rb', line 450

    def Read
      @Settings = {}
      @modified = false

      # Read security settings

      Builtins.mapmap(@Locations) do |file, vars|
        Builtins.maplist(vars) do |var|
          val = ""
          filename = nil
          if Builtins.issubstring(file, "sysconfig")
            filename = Ops.add(
              "/etc",
              Builtins.mergestring(Builtins.splitstring(file, "."), "/")
            )
            Builtins.y2debug("filename=%1", filename)
          end
          if filename == nil ||
              Ops.greater_than(SCR.Read(path(".target.size"), filename), 0)
            val = Convert.to_string(
              SCR.Read(Builtins.topath(Ops.add(Ops.add(file, "."), var)))
            )
            Builtins.y2debug(
              "Reading: %1 (%2)",
              Builtins.topath(Ops.add(Ops.add(file, "."), var)),
              val
            )
          end
          Ops.set(@Settings, var, val) if val != nil
        end
        { 0 => 0 }
      end
      Builtins.y2debug("Settings=%1", @Settings)

      Ops.set(@Settings, "CONSOLE_SHUTDOWN", ReadConsoleShutdown())

      Builtins.y2debug("Settings=%1", @Settings)

      # Read runlevel setting
      ReadServiceSettings()

      # Read pam settings

      method = Convert.to_string(
        SCR.Read(path(".etc.login_defs.ENCRYPT_METHOD"))
      )
      if method == nil ||
          !Builtins.contains(@encryption_methods, Builtins.tolower(method))
        method = "des"
      end
      Ops.set(@Settings, "PASSWD_ENCRYPTION", Builtins.tolower(method))

      # cracklib and pwhistory settings
      Ops.set(@Settings, "PASS_MIN_LEN", "5")
      Ops.set(@Settings, "PASSWD_USE_CRACKLIB", "no")
      Ops.set(@Settings, "PASSWD_REMEMBER_HISTORY", "0")

      pam_cracklib = Pam.Query("cracklib")
      if Ops.greater_than(Builtins.size(pam_cracklib), 0)
        Ops.set(@Settings, "PASSWD_USE_CRACKLIB", "yes")
      end
      # save the default value
      Ops.set(@Settings, "CRACKLIB_DICT_PATH", "/usr/lib/cracklib_dict")
      Builtins.foreach(Ops.get_list(pam_cracklib, "password", [])) do |val|
        lval = Builtins.splitstring(val, "=")
        if Builtins.issubstring(val, "dictpath=")
          Ops.set(
            @Settings,
            "CRACKLIB_DICT_PATH",
            Ops.get_string(lval, 1, "/usr/lib/cracklib_dict")
          )
        end
        if Builtins.issubstring(val, "minlen=") &&
            Ops.get_string(lval, 1, "") != ""
          Ops.set(@Settings, "PASS_MIN_LEN", Ops.get_string(lval, 1, "5"))
        end
      end

      pam_history = Pam.Query("pwhistory")
      Builtins.foreach(Ops.get_list(pam_history, "password", [])) do |val|
        lval = Builtins.splitstring(val, "=")
        if Builtins.issubstring(val, "remember=") &&
            Ops.get_string(lval, 1, "") != ""
          Ops.set(
            @Settings,
            "PASSWD_REMEMBER_HISTORY",
            Ops.get_string(lval, 1, "0")
          )
        end
      end

      Builtins.y2debug("Settings=%1", @Settings)

      # Local permissions hack

      perm = Ops.get(@Settings, "PERMISSION_SECURITY", "")
      if Builtins.issubstring(perm, "easy")
        perm = "easy"
      elsif Builtins.issubstring(perm, "paranoid")
        perm = "paranoid"
      elsif Builtins.issubstring(perm, "secure")
        perm = "secure"
      else
        perm = "secure"
      end
      Ops.set(@Settings, "PERMISSION_SECURITY", perm)
      Builtins.y2debug("Settings=%1", @Settings)

      # read local polkit settings
      action = "org.freedesktop.upower.hibernate"
      hibernate = Convert.to_string(
        SCR.Read(Builtins.add(path(".etc.polkit-default-privs_local"), action))
      )
      if hibernate != nil
        Ops.set(@Settings, "HIBERNATE_SYSTEM", "active_console")
        if hibernate == "auth_admin:auth_admin:auth_admin"
          Ops.set(@Settings, "HIBERNATE_SYSTEM", "auth_admin")
        end
        if hibernate == "yes:yes:yes"
          Ops.set(@Settings, "HIBERNATE_SYSTEM", "anyone")
        end
      end
      Builtins.y2debug(
        "HIBERNATE_SYSTEM: %1",
        Ops.get(@Settings, "HIBERNATE_SYSTEM", "")
      )

      # read sysctl.conf
      Builtins.foreach(@sysctl) do |key, default_value|
        val = Convert.to_string(
          SCR.Read(Builtins.add(path(".etc.sysctl_conf"), key))
        )
        val = default_value if val == nil || val == ""
        Ops.set(@Settings, key, val)
      end
      Builtins.y2debug("Settings=%1", @Settings)

      # remeber the read values
      @Settings_bak = deep_copy(@Settings)
      true
    end

### - (`Object`) ReadConsoleShutdown

Read the information about ctrl+alt+del behavior See bug 742783 for description

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    # File '../../src/modules/Security.rb', line 406

    def ReadConsoleShutdown
      ret = "ignore"

      if Package.Installed("systemd")
        if !FileUtils.Exists(@ctrl_alt_del_file)
          ret = "reboot"
        else
          link = Convert.to_string(
            SCR.Read(path(".target.symlink"), @ctrl_alt_del_file)
          )
          if link == "/lib/systemd/system/poweroff.target"
            ret = "halt"
          elsif link == "/lib/systemd/system/reboot.target" ||
              link == "/lib/systemd/system/ctrl-alt-del.target"
            ret = "reboot"
          end
        end
        return ret
      end
      inittab = SCR.Dir(path(".etc.inittab"))
      if Builtins.contains(inittab, "ca")
        ca = Convert.to_string(SCR.Read(path(".etc.inittab.ca")))
        if Builtins.issubstring(ca, "/bin/true") ||
            Builtins.issubstring(ca, "/bin/false")
          Ops.set(@Settings, "CONSOLE_SHUTDOWN", "ignore")
        elsif Builtins.issubstring(ca, "reboot") ||
            Builtins.issubstring(ca, " -r")
          Ops.set(@Settings, "CONSOLE_SHUTDOWN", "reboot")
        elsif Builtins.issubstring(ca, "halt") ||
            Builtins.issubstring(ca, " -h")
          Ops.set(@Settings, "CONSOLE_SHUTDOWN", "halt")
        else
          Builtins.y2error("Unknown ca status: %1", ca)
          Ops.set(@Settings, "CONSOLE_SHUTDOWN", "ignore")
        end
      else
        Ops.set(@Settings, "CONSOLE_SHUTDOWN", "ignore")
      end

      nil
    end

### - (`Object`) ReadServiceSettings

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    # File '../../src/modules/Security.rb', line 379

    def ReadServiceSettings
      Ops.set(
        @Settings,
        "RUNLEVEL3_MANDATORY_SERVICES",
        MissingMandatoryServices(3) == [] ? "secure" : "insecure"
      )
      Ops.set(
        @Settings,
        "RUNLEVEL5_MANDATORY_SERVICES",
        MissingMandatoryServices(5) == [] ? "secure" : "insecure"
      )
      Ops.set(
        @Settings,
        "RUNLEVEL3_EXTRA_SERVICES",
        ExtraServices(3) == [] ? "secure" : "insecure"
      )
      Ops.set(
        @Settings,
        "RUNLEVEL5_EXTRA_SERVICES",
        ExtraServices(5) == [] ? "secure" : "insecure"
      )

      nil
    end

### - (`Object`) SetModified

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    # File '../../src/modules/Security.rb', line 365

    def SetModified
      @modified = true

      nil
    end

### - (`Object`) Summary

Create a textual summary and a list of unconfigured cards

Returns:

- summary of the current configuration

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    # File '../../src/modules/Security.rb', line 889

    def Summary
      settings = deep_copy(@Settings)
      Builtins.foreach(@do_not_test) do |key|
        settings = Builtins.remove(settings, key)
      end

      # Determine current settings
      current = :custom
      Builtins.maplist(@Levels) do |key, level|
        Builtins.y2debug("%1=%2", key, level)
        current = key if level == settings
      end
      Builtins.y2debug("%1=%2", current, @Settings)

      # Summary text
      summary = _("Current Security Level: Custom settings")
      if current != :custom
        # Summary text
        summary = Builtins.sformat(
          _("Current Security Level: %1"),
          Ops.get(@LevelsNames, Convert.to_string(current), "")
        )
      end

      [summary, []]
    end

### - (`Object`) Write

Write all security settings

Returns:

- true on success

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    # File '../../src/modules/Security.rb', line 638

    def Write
      return true if !@modified
      Builtins.y2milestone("Writing configuration")

      # Security read dialog caption
      caption = _("Saving Security Configuration")
      steps = 4

      Progress.New(
        caption,
        " ",
        steps,
        [
          # Progress stage 1/4
          _("Write security settings"),
          # Progress stage 2/4
          _("Write inittab settings"),
          # Progress stage 3/4
          _("Write PAM settings"),
          # Progress stage 4/4
          _("Update system settings")
        ],
        [
          # Progress step 1/5
          _("Writing security settings..."),
          # Progress step 2/5
          _("Writing inittab settings..."),
          # Progress step 3/5
          _("Writing PAM settings..."),
          # Progress step 4/5
          _("Updating system settings..."),
          # Progress step 5/5
          _("Finished")
        ],
        ""
      )

      # Write security settings
      return false if Abort()
      Progress.NextStage

      Builtins.y2debug("Settings=%1", @Settings)
      Ops.set(
        @Settings,
        "PERMISSION_SECURITY",
        Ops.add(Ops.get(@Settings, "PERMISSION_SECURITY", ""), " local")
      )

      commitlist = []
      Builtins.mapmap(@Locations) do |file, vars|
        Builtins.maplist(vars) do |var|
          val = Ops.get(@Settings, var)
          if val != nil &&
              val != SCR.Read(Builtins.topath(Ops.add(Ops.add(file, "."), var)))
            SCR.Write(Builtins.topath(Ops.add(Ops.add(file, "."), var)), val)
            commitlist = Convert.convert(
              Builtins.union(commitlist, [file]),
              :from => "list",
              :to   => "list <string>"
            )
          end
        end
        { 0 => 0 }
      end

      Builtins.maplist(commitlist) do |file|
        SCR.Write(Builtins.topath(file), nil)
      end

      # Write inittab settings
      return false if Abort()
      Progress.NextStage

      WriteConsoleShutdown(Ops.get(@Settings, "CONSOLE_SHUTDOWN", "ignore"))

      # Write pam settings
      return false if Abort()
      Progress.NextStage

      # pam stuff
      encr = Ops.get(@Settings, "PASSWD_ENCRYPTION", "sha512")
      if encr != Ops.get(@Settings_bak, "PASSWD_ENCRYPTION", "")
        SCR.Write(path(".etc.login_defs.ENCRYPT_METHOD"), encr)
      end

      # use cracklib?
      if Ops.get(@Settings, "PASSWD_USE_CRACKLIB", "no") == "yes"
        Pam.Add("cracklib")
        pth = Ops.get(@Settings, "CRACKLIB_DICT_PATH", "/usr/lib/cracklib_dict")
        if pth != "/usr/lib/cracklib_dict"
          Pam.Add(Ops.add("--cracklib-dictpath=", pth))
        end
      else
        Pam.Remove("cracklib")
      end

      # save min pass length
      if Ops.get(@Settings, "PASS_MIN_LEN", "5") != "5" &&
          Ops.get(@Settings, "PASSWD_USE_CRACKLIB", "no") == "yes"
        Pam.Add("cracklib") # minlen is part of cracklib
        Pam.Add(
          Builtins.sformat(
            "cracklib-minlen=%1",
            Ops.get(@Settings, "PASS_MIN_LEN", "5")
          )
        )
      else
        Pam.Remove("cracklib-minlen")
      end

      # save "remember" value (number of old user passwords to not allow)
      if Ops.get(@Settings, "PASSWD_REMEMBER_HISTORY", "0") != "0"
        Pam.Add("pwhistory")
        Pam.Add(
          Builtins.sformat(
            "pwhistory-remember=%1",
            Ops.get(@Settings, "PASSWD_REMEMBER_HISTORY", "0")
          )
        )
      else
        Pam.Remove("pwhistory-remember")
      end

      # write local polkit settings
      if Ops.get(@Settings, "HIBERNATE_SYSTEM", "") !=
          Ops.get(@Settings_bak, "HIBERNATE_SYSTEM", "")
        # allow writing any value (different from predefined ones)
        ycp_value = Ops.get(@Settings, "HIBERNATE_SYSTEM", "active_console")
        hibernate = Ops.get(@ycp2polkit, ycp_value, ycp_value)
        action = "org.freedesktop.upower.hibernate"
        SCR.Write(
          Builtins.add(path(".etc.polkit-default-privs_local"), action),
          hibernate
        )
      end

      # write sysctl.conf
      Builtins.foreach(@sysctl) do |key, default_value|
        val = Ops.get(@Settings, key, default_value)
        if Builtins.tointeger(val) == nil
          Builtins.y2error(
            "value %1 for %2 is not integer, not writing",
            val,
            key
          )
        elsif val != SCR.Read(Builtins.add(path(".etc.sysctl_conf"), key))
          SCR.Write(Builtins.add(path(".etc.sysctl_conf"), key), val)
        end
      end

      # enable sysrq?
      sysrq = Builtins.tointeger(Ops.get(@Settings, "kernel.sysrq", "0"))
      if sysrq != nil
        SCR.Execute(
          path(".target.bash"),
          Builtins.sformat("echo %1 > /proc/sys/kernel/sysrq", sysrq)
        )
      end

      # Finish him
      return false if Abort()
      Progress.NextStage

      # apply all current permissions as they are now (what SuSEconfig --module permissions would have done)
      SCR.Execute(path(".target.bash"), "/usr/bin/chkstat --system")

      # ensure polkit privileges are applied (bnc #541393)
      if FileUtils.Exists("/sbin/set_polkit_default_privs")
        SCR.Execute(path(".target.bash"), "/sbin/set_polkit_default_privs")
      end

      return false if Abort()
      Progress.NextStage

      # activate the changes
      Builtins.foreach(@activation_mapping) do |setting, action|
        if Ops.get(@Settings, setting, "") !=
            Ops.get(@Settings_bak, setting, "")
          Builtins.y2milestone(
            "Option %1 has been modified, activating the change: %2",
            setting,
            action
          )

          res = Convert.to_integer(SCR.Execute(path(".target.bash"), action))
          Builtins.y2error("Activation failed") if res != 0
        end
      end

      return false if Abort()
      @modified = false
      true
    end

### - (`Object`) WriteConsoleShutdown(ca)

Write the value of ctrl-alt-delete behavior

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    # File '../../src/modules/Security.rb', line 594

    def WriteConsoleShutdown(ca)
      if Package.Installed("systemd")
        if ca == "reboot"
          SCR.Execute(path(".target.remove"), @ctrl_alt_del_file)
        elsif ca == "halt"
          SCR.Execute(
            path(".target.bash"),
            Builtins.sformat(
              "ln -s -f /lib/systemd/system/poweroff.target %1",
              @ctrl_alt_del_file
            )
          )
        else
          SCR.Execute(
            path(".target.bash"),
            Builtins.sformat("ln -s -f /dev/null %1", @ctrl_alt_del_file)
          )
        end
        return true
      end

      if ca == "reboot"
        SCR.Write(
          path(".etc.inittab.ca"),
          ":ctrlaltdel:/sbin/shutdown -r -t 4 now"
        )
      elsif ca == "halt"
        SCR.Write(
          path(".etc.inittab.ca"),
          ":ctrlaltdel:/sbin/shutdown -h -t 4 now"
        )
      else
        SCR.Write(path(".etc.inittab.ca"), ":ctrlaltdel:/bin/true")
      end
      SCR.Write(path(".etc.inittab"), nil)

      # re-read the modified inittab (#83480)
      SCR.Execute(path(".target.bash"), "/sbin/telinit q")
      true
    end