Class: Yast::SecurityClass

Inherits:
Module
  • Object
show all
Includes:
Logger
Defined in:
../../src/modules/Security.rb

Instance Method Summary (collapse)

Instance Method Details

- (Object) Abort

Abort function

Returns:

  • blah blah lahjk



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# File '../../src/modules/Security.rb', line 328

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 848

def Export
  Builtins.eval(@Settings)
end

- (Object) ExtraServices(enabled_services = nil)

List of enabled services that are neither mandatory nor optional

Parameters:

  • enabled_services (Array<String>) (defaults to: nil)

    optional list with names of the currently enabled services. If not provided, it will be obtained from SystemdService.



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# File '../../src/modules/Security.rb', line 302

def ExtraServices(enabled_services = nil)
  log.info("Searching for extra services")

  enabled_services ||= SystemdService.all.select(&:enabled?).map(&:name)
  return nil if enabled_services == nil

  mandatory = @mandatory_services.flatten
  ret = enabled_services.select do |service|
    # the extra service is not mandatory and it's not optional
    extra = !mandatory.include?(service) && !@optional_services.include?(service)
    log.info("Found extra service: #{service}") if extra
    extra
  end 
  log.info("All extra services: #{ret}")

  deep_copy(ret)
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 336

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 802

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 35

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

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

  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",
    "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.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(enabled_services = nil)

List of missing mandatory services

Parameters:

  • enabled_services (Array<String>) (defaults to: nil)

    optional list with names of the currently enabled services. If not provided, it will be obtained from SystemdService.



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# File '../../src/modules/Security.rb', line 280

def MissingMandatoryServices(enabled_services = nil)
  log.info("Checking mandatory services")

  enabled_services ||= SystemdService.all.select(&:enabled?).map(&:name)
  log.info("enabled_services: #{enabled_services}")
  return nil if enabled_services.nil?

  ret = @mandatory_services.select do |services|
    enabled = services.any? { |service| enabled_services.include?(service) }
    log.info("Mandatory services #{services} are enabled: #{enabled}")
    !enabled
  end 

  log.info("Missing mandatory services: #{ret}")
  deep_copy(ret)
end

- (Object) Modified

Data was modified?

Returns:

  • true if modified



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# File '../../src/modules/Security.rb', line 352

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 883

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 322

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 415

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 371

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 357

def ReadServiceSettings
  services = SystemdService.all.select(&:enabled?).map(&:name)
  setting = MissingMandatoryServices(services) == [] ? "secure" : "insecure"
  # Runlevels are not longer used, but @Settings is populated this way for
  # compatibility with the current interface
  @Settings["RUNLEVEL3_MANDATORY_SERVICES"] = @Settings["RUNLEVEL5_MANDATORY_SERVICES"] = setting
  setting = ExtraServices(services) == [] ? "secure" : "insecure"
  @Settings["RUNLEVEL3_EXTRA_SERVICES"] = @Settings["RUNLEVEL5_EXTRA_SERVICES"] = setting

  nil
end

- (Object) SetModified



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# File '../../src/modules/Security.rb', line 343

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 854

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 603

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 559

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