Class: Chef::Provider::User::MacUser

Inherits:
Chef::Provider::User show all
Includes:
Mixin::Which
Defined in:
lib/chef/provider/user/mac.rb

Overview

A macOS user provider that is compatible with default TCC restrictions in macOS 10.14. See resource/user/mac_user.rb for complete description of the mac_user resource

Defined Under Namespace

Classes: Plist

Instance Attribute Summary collapse

Attributes inherited from Chef::Provider::User

#change_desc, #locked, #user_exists

Attributes inherited from Chef::Provider

#action, #after_resource, #current_resource, #logger, #new_resource, #recipe_name, #run_context

Instance Method Summary collapse

Methods inherited from Chef::Provider::User

#convert_group_name, #define_resource_requirements, #initialize

Methods inherited from Chef::Provider

action, #action_nothing, #check_resource_semantics!, #cleanup_after_converge, #compile_and_converge_action, #converge_by, #converge_if_changed, #cookbook_name, #define_resource_requirements, #description, #events, include_resource_dsl?, include_resource_dsl_module, #initialize, #introduced, #load_after_resource, #node, #process_resource_requirements, provides, provides?, #requirements, #resource_collection, #resource_updated?, #run_action, #set_updated_status, supports?, use, use_inline_resources, #validate_required_properties!, #whyrun_mode?, #whyrun_supported?

Methods included from Mixin::LazyModuleInclude

#descendants, #include, #included

Methods included from Mixin::PowershellOut

#powershell_out, #powershell_out!

Methods included from Mixin::WindowsArchitectureHelper

#assert_valid_windows_architecture!, #disable_wow64_file_redirection, #forced_32bit_override_required?, #is_i386_process_on_x86_64_windows?, #node_supports_windows_architecture?, #node_windows_architecture, #restore_wow64_file_redirection, #valid_windows_architecture?, #with_os_architecture, #wow64_architecture_override_required?, #wow64_directory

Methods included from Mixin::PowershellExec

#powershell_exec, #powershell_exec!

Methods included from DSL::Powershell

#ps_credential

Methods included from DSL::RegistryHelper

#registry_data_exists?, #registry_get_subkeys, #registry_get_values, #registry_has_subkeys?, #registry_key_exists?, #registry_value_exists?

Methods included from DSL::ChefVault

#chef_vault, #chef_vault_item, #chef_vault_item_for_environment

Methods included from DSL::DataQuery

#data_bag, #data_bag_item, #search, #tagged?

Methods included from EncryptedDataBagItem::CheckEncrypted

#encrypted?

Methods included from DSL::PlatformIntrospection

#older_than_win_2012_or_8?, #platform?, #platform_family?, #value_for_platform, #value_for_platform_family

Methods included from Mixin::Provides

#provided_as, #provides, #provides?

Methods included from Mixin::DescendantsTracker

#descendants, descendants, #direct_descendants, direct_descendants, #find_descendants_by_name, find_descendants_by_name, #inherited, store_inherited

Methods included from DSL::Recipe

#exec, #have_resource_class_for?, #resource_class_for

Methods included from DSL::Definitions

add_definition, #evaluate_resource_definition, #has_resource_definition?

Methods included from DSL::Resources

add_resource_dsl, remove_resource_dsl

Methods included from DSL::Cheffish

load_cheffish

Methods included from DSL::RebootPending

#reboot_pending?

Methods included from DSL::IncludeRecipe

#include_recipe, #load_recipe

Methods included from Mixin::NotifyingBlock

#notifying_block, #subcontext_block

Methods included from DSL::DeclareResource

#build_resource, #declare_resource, #delete_resource, #delete_resource!, #edit_resource, #edit_resource!, #find_resource, #find_resource!, #resources, #with_run_context

Constructor Details

This class inherits a constructor from Chef::Provider::User

Instance Attribute Details

#admin_group_plistObject (readonly)

Returns the value of attribute admin_group_plist


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# File 'lib/chef/provider/user/mac.rb', line 39

def admin_group_plist
  @admin_group_plist
end

#user_plistObject (readonly)

Returns the value of attribute user_plist


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# File 'lib/chef/provider/user/mac.rb', line 39

def user_plist
  @user_plist
end

Instance Method Details

#admin_user?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 507

def admin_user?
  admin_group_plist[:group_members].any? { |mem| mem == user_plist[:guid][0] }
rescue
  false
end

#check_lockObject


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# File 'lib/chef/provider/user/mac.rb', line 347

def check_lock
  @locked = locked?
end

#compare_userObject


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# File 'lib/chef/provider/user/mac.rb', line 222

def compare_user
  @change_desc = []
  %i{comment shell uid gid salt password admin secure_token hidden}.each do |attr|
    if diverged?(attr)
      desc = "Update #{attr}"
      unless %i{password gid secure_token hidden}.include?(attr)
        desc << " from #{current_resource.send(attr)} to #{new_resource.send(attr)}"
      end
      @change_desc << desc
    end
  end
  !@change_desc.empty?
end

#convert_to_binary(string) ⇒ Object


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# File 'lib/chef/provider/user/mac.rb', line 513

def convert_to_binary(string)
  string.unpack("a2" * (string.size / 2)).collect { |i| i.hex.chr }.join
end

#create_userObject

User Provider Callbacks


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# File 'lib/chef/provider/user/mac.rb', line 145

def create_user
  cmd = [-"-addUser", new_resource.username]
  cmd += ["-fullName", new_resource.comment] if prop_is_set?(:comment)
  cmd += ["-UID", prop_is_set?(:uid) ? new_resource.uid : get_free_uid]
  cmd += ["-shell", new_resource.shell]
  cmd += ["-home", new_resource.home]
  cmd += ["-admin"] if new_resource.admin

  # We can technically create a new user without the admin credentials
  # but without them the user cannot enable SecureToken, thus they cannot
  # create other secure users or enable FileVault full disk encryption.
  if prop_is_set?(:admin_username) && prop_is_set?(:admin_password)
    cmd += ["-adminUser", new_resource.admin_username]
    cmd += ["-adminPassword", new_resource.admin_password]
  end

  # sysadminctl doesn't exit with a non-zero exit code if it encounters
  # a problem. We'll check stderr and make sure we see that it finished
  # correctly.
  res = run_sysadminctl(cmd)
  unless /creating user/.match?(res.downcase)
    raise Chef::Exceptions::User, "error when creating user: #{res}"
  end

  # Wait for the user to show up in the ds cache
  wait_for_user

  # Reload with up-to-date user information
  reload_user_plist
  reload_admin_group_plist

  if prop_is_set?(:hidden)
    set_hidden
  end

  if prop_is_set?(:password)
    converge_by("set password") { set_password }
  end

  if new_resource.manage_home
    # "sysadminctl -addUser" will create the home directory if it's
    # the default /Users/<username>, otherwise it sets it in plist
    # but does not create it. Here we'll ensure that it gets created
    # if we've been given a directory that is not the default.
    unless ::File.directory?(new_resource.home) && ::File.exist?(new_resource.home)
      converge_by("create home directory") do
        shell_out!("createhomedir -c -u #{new_resource.username}")
      end
    end
  end

  if prop_is_set?(:gid)
    # NOTE: Here we're managing the primary group of the user which is
    # a departure from previous behavior. We could just set the
    # PrimaryGroupID for the user and move on if we decide that actual
    # group management should be done outside of the core resource.
    group_name, group_id, group_action = user_group_info

    group group_name do
      members new_resource.username
      gid group_id if group_id
      action group_action
      append true
    end

    converge_by("create primary group ID") do
      run_dscl("create", "/Users/#{new_resource.username}", "PrimaryGroupID", group_id)
    end
  end

  if diverged?(:secure_token)
    converge_by("alter SecureToken") { toggle_secure_token }
  end

  reload_user_plist
end

#diverged?(prop) ⇒ Boolean

Methods

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 355

def diverged?(prop)
  prop = prop.to_sym

  case prop
  when :password
    password_diverged?
  when :gid
    user_group_diverged?
  when :secure_token
    secure_token_diverged?
  when :hidden
    hidden_diverged?
  else
    # Other fields are have been set on current resource so just compare
    # them.
    !new_resource.send(prop).nil? && (new_resource.send(prop) != current_resource.send(prop))
  end
end

#get_free_uid(search_limit = 1000) ⇒ Object

Find the next available uid on the system. Starting with 200 if system is set, 501 otherwise.


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# File 'lib/chef/provider/user/mac.rb', line 376

def get_free_uid(search_limit = 1000)
  uid = nil
  base_uid = new_resource.system ? 200 : 501
  next_uid_guess = base_uid
  users_uids = run_dscl("list", "/Users", "uid")
  while next_uid_guess < search_limit + base_uid
    if users_uids&.match?(Regexp.new("#{Regexp.escape(next_uid_guess.to_s)}\n"))
      next_uid_guess += 1
    else
      uid = next_uid_guess
      break
    end
  end
  uid || raise("uid not found. Exhausted. Searched #{search_limit} times")
end

#hidden_diverged?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 460

def hidden_diverged?
  return false unless prop_is_set?(:hidden)

  (current_resource.hidden ? 1 : 0) != hidden_value.to_i
end

#hidden_valueObject


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# File 'lib/chef/provider/user/mac.rb', line 470

def hidden_value
  new_resource.hidden ? 1 : 0
end

#load_current_resourceObject


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# File 'lib/chef/provider/user/mac.rb', line 41

def load_current_resource
  @current_resource = Chef::Resource::User::MacUser.new(new_resource.username)
  current_resource.username(new_resource.username)

  reload_admin_group_plist
  reload_user_plist

  if user_plist
    current_resource.uid(user_plist[:uid][0])
    current_resource.gid(user_plist[:gid][0])
    current_resource.home(user_plist[:home][0])
    current_resource.shell(user_plist[:shell][0])
    current_resource.comment(user_plist[:comment][0])

    if user_plist[:is_hidden]
      current_resource.hidden(user_plist[:is_hidden][0] == "1" ? true : false)
    end

    shadow_hash = user_plist[:shadow_hash]
    if shadow_hash
      current_resource.password(shadow_hash[0]["SALTED-SHA512-PBKDF2"]["entropy"].string.unpack("H*")[0])
      current_resource.salt(shadow_hash[0]["SALTED-SHA512-PBKDF2"]["salt"].string.unpack("H*")[0])
      current_resource.iterations(shadow_hash[0]["SALTED-SHA512-PBKDF2"]["iterations"].to_i)
    end

    current_resource.secure_token(secure_token_enabled?)
    current_resource.admin(admin_user?)
  else
    @user_exists = false
    logger.trace("#{new_resource} user does not exist")
  end

  current_resource
end

#lock_userObject


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# File 'lib/chef/provider/user/mac.rb', line 327

def lock_user
  run_dscl("append", "/Users/#{new_resource.username}", "AuthenticationAuthority", ";DisabledUser;")

  reload_user_plist
end

#locked?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 341

def locked?
  user_plist[:auth_authority].any? { |tag| tag == ";DisabledUser;" }
rescue
  false
end

#manage_userObject


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# File 'lib/chef/provider/user/mac.rb', line 236

def manage_user
  %i{uid home}.each do |prop|
    raise Chef::Exceptions::User, "cannot modify #{prop} on macOS >= 10.14" if diverged?(prop)
  end

  if diverged?(:password)
    converge_by("alter password") { set_password }
  end

  if diverged?(:comment)
    converge_by("alter comment") do
      run_dscl("create", "/Users/#{new_resource.username}", "RealName", new_resource.comment)
    end
  end

  if diverged?(:shell)
    converge_by("alter shell") do
      run_dscl("create", "/Users/#{new_resource.username}", "UserShell", new_resource.shell)
    end
  end

  if diverged?(:secure_token)
    converge_by("alter SecureToken") { toggle_secure_token }
  end

  if diverged?(:admin)
    converge_by("alter admin group membership") do
      group "admin" do
        if new_resource.admin
          members new_resource.username
        else
          excluded_members new_resource.username
        end

        action :create
        append true
      end

      admins = admin_group_plist[:group_members]
      if new_resource.admin
        admins << user_plist[:guid][0]
      else
        admins.reject! { |m| m == user_plist[:guid][0] }
      end

      run_dscl("create", "/Groups/admin", "GroupMembers", admins)
    end

    reload_admin_group_plist
  end

  group_name, group_id, group_action = user_group_info
  group group_name do
    gid group_id if group_id
    members new_resource.username
    action group_action
    append true
  end

  if diverged?(:gid)
    converge_by("alter group membership") do
      run_dscl("create", "/Users/#{new_resource.username}", "PrimaryGroupID", group_id)
    end
  end

  if diverged?(:hidden)
    converge_by("alter hidden") { set_hidden }
  end

  reload_user_plist
end

#password_diverged?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 474

def password_diverged?
  # There are three options for configuring the password:
  #   * ShadowHashData which includes the hash data as:
  #     * hashed entropy as the "password"
  #     * salt
  #     * iterations
  #   * Plaintext password
  #   * Not configuring it

  # Check for no desired password configuration
  return false unless prop_is_set?(:password)

  # Check for ShadowHashData divergence by comparing the entropy,
  # salt, and iterations.
  if prop_is_set?(:salt)
    return true if %i{salt iterations}.any? { |prop| diverged?(prop) }

    return new_resource.password != current_resource.password
  end

  # Check for plaintext password divergence. We don't actually know
  # what the stored password is but we can hash the given password with
  # stored salt and iterations, and compare the resulting entropy with
  # the saved entropy.
  OpenSSL::PKCS5.pbkdf2_hmac(
    new_resource.password,
    convert_to_binary(current_resource.salt),
    current_resource.iterations.to_i,
    128,
    OpenSSL::Digest.new("SHA512")
  ).unpack("H*")[0] != current_resource.password
end

#prop_is_set?(prop) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 631

def prop_is_set?(prop)
  v = new_resource.send(prop.to_sym)

  !v.nil? && v != ""
end

#reload_admin_group_plistObject


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# File 'lib/chef/provider/user/mac.rb', line 76

def reload_admin_group_plist
  @admin_group_plist = nil

  admin_group_xml = run_dscl("read", "/Groups/admin")
  return nil unless admin_group_xml && admin_group_xml != ""

  @admin_group_plist = Plist.new(::Plist.parse_xml(admin_group_xml))
end

#reload_user_plistObject


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# File 'lib/chef/provider/user/mac.rb', line 85

def reload_user_plist
  @user_plist = nil

  # Load the user information.
  begin
    user_xml = run_dscl("read", "/Users/#{new_resource.username}")
  rescue Chef::Exceptions::DsclCommandFailed
    return nil
  end

  return nil if user_xml.nil? || user_xml == ""

  @user_plist = Plist.new(::Plist.parse_xml(user_xml))

  return unless user_plist[:shadow_hash]

  shadow_hash_hex = user_plist[:shadow_hash][0]
  return unless shadow_hash_hex && shadow_hash_hex != ""

  # The password information is stored in the ShadowHashData key in the
  # plist. However, parsing it is a bit tricky as the value is itself
  # another encoded binary plist. We have to extract the encoded plist,
  # decode it from hex to a binary plist and then convert the binary
  # into XML plist. From there we can extract the hash data.
  #
  # NOTE: `dscl -read` and `plutil -convert` return different values for
  # ShadowHashData.
  #
  # `dscl` returns the value encoded as a hex string and stored as a <string>
  # `plutil` returns the value encoded as a base64 string stored as <data>
  #
  #  eg:
  #
  # spellchecker: disable
  #
  # <array>
  #   <string>77687920 63616e27 74206170 706c6520 6275696c 6420636f 6e736973 74656e74 20746f6f 6c696e67</string>
  # </array>
  #
  # vs
  #
  # <array>
  #   <data>AADKAAAKAA4LAA0MAAAAAAAAAAA=</data>
  # </array>
  #
  # spellchecker: disable
  #
  begin
    shadow_binary_plist = [shadow_hash_hex.delete(" ")].pack("H*")
    shadow_xml_plist = shell_out("plutil", "-convert", "xml1", "-o", "-", "-", input: shadow_binary_plist).stdout
    user_plist[:shadow_hash] = ::Plist.parse_xml(shadow_xml_plist)
  rescue Chef::Exceptions::PlistUtilCommandFailed, Chef::Exceptions::DsclCommandFailed
    nil
  end
end

#remove_userObject


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# File 'lib/chef/provider/user/mac.rb', line 308

def remove_user
  cmd = ["-deleteUser", new_resource.username]
  cmd << new_resource.manage_home ? "-secure" : "-keepHome"
  if %i{admin_username admin_password}.all? { |p| prop_is_set?(p) }
    cmd += ["-adminUser", new_resource.admin_username]
    cmd += ["-adminPassword", new_resource.admin_password]
  end

  # sysadminctl doesn't exit with a non-zero exit code if it encounters
  # a problem. We'll check stderr and make sure we see that it finished
  res = run_sysadminctl(cmd)
  unless /deleting record|not found/.match?(res.downcase)
    raise Chef::Exceptions::User, "error deleting user: #{res}"
  end

  reload_user_plist
  @user_exists = false
end

#run_dscl(*args) ⇒ Object


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# File 'lib/chef/provider/user/mac.rb', line 615

def run_dscl(*args)
  result = shell_out("dscl", "-plist", ".", "-#{args[0]}", args[1..])
  return "" if ( args.first =~ /^delete/ ) && ( result.exitstatus != 0 )
  raise(Chef::Exceptions::DsclCommandFailed, "dscl error: #{result.inspect}") unless result.exitstatus == 0
  raise(Chef::Exceptions::DsclCommandFailed, "dscl error: #{result.inspect}") if /No such key: /.match?(result.stdout)

  result.stdout
end

#run_dsimport(*args) ⇒ Object


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# File 'lib/chef/provider/user/mac.rb', line 604

def run_dsimport(*args)
  shell_out!("dsimport", args)
end

#run_plutil(*args) ⇒ Object


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# File 'lib/chef/provider/user/mac.rb', line 624

def run_plutil(*args)
  result = shell_out("plutil", "-#{args[0]}", args[1..])
  raise(Chef::Exceptions::PlistUtilCommandFailed, "plutil error: #{result.inspect}") unless result.exitstatus == 0

  result.stdout
end

#run_sysadminctl(args) ⇒ Object


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# File 'lib/chef/provider/user/mac.rb', line 608

def run_sysadminctl(args)
  # sysadminctl doesn't exit with a non-zero code when errors are encountered
  # and outputs everything to STDERR instead of STDOUT and STDERR. Therefore we'll
  # return the STDERR and let the caller handle it.
  shell_out!("sysadminctl", args).stderr
end

#secure_token_diverged?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 419

def secure_token_diverged?
  new_resource.secure_token ? !secure_token_enabled? : secure_token_enabled?
end

#secure_token_enabled?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 413

def secure_token_enabled?
  user_plist[:auth_authority].any? { |tag| tag == ";SecureToken;" }
rescue
  false
end

#set_hiddenObject


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# File 'lib/chef/provider/user/mac.rb', line 466

def set_hidden
  run_dscl("create", "/Users/#{new_resource.username}", "IsHidden", hidden_value.to_i)
end

#set_passwordObject


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# File 'lib/chef/provider/user/mac.rb', line 517

def set_password
  if prop_is_set?(:salt)
    entropy = StringIO.new(convert_to_binary(new_resource.password))
    salt = StringIO.new(convert_to_binary(new_resource.salt))
  else
    salt = StringIO.new(OpenSSL::Random.random_bytes(32))
    entropy = StringIO.new(
      OpenSSL::PKCS5.pbkdf2_hmac(
        new_resource.password,
        salt.string,
        new_resource.iterations,
        128,
        OpenSSL::Digest.new("SHA512")
      )
    )
  end

  shadow_hash = user_plist[:shadow_hash] ? user_plist[:shadow_hash][0] : {}
  shadow_hash["SALTED-SHA512-PBKDF2"] = {
    "entropy" => entropy,
    "salt" => salt,
    "iterations" => new_resource.iterations,
  }

  shadow_hash_binary = StringIO.new
  shell_out("plutil", "-convert", "binary1", "-o", "-", "-",
    input: shadow_hash.to_plist,
    live_stream: shadow_hash_binary)

  # Apple seem to have killed their dsimport documentation about the
  # dsimport record format. Perhaps that means our days of being able to
  # use dsimport without an admin password or perhaps at all could be
  # numbered. Here is the record format for posterity:
  #
  # End of record character
  # Escape character
  # Field separator
  # Value separator
  # Record type (Users, Groups, Computers, ComputerGroups, ComputerLists)
  # Number of properties
  # Property 1
  # ...
  # Property N
  #
  # The user password shadow data format breaks down as:
  #
  # 0x0A                                    End of record denoted by \n
  # 0x5C                                    Escaping is denoted by \
  # 0x3A                                    Fields are separated by :
  # 0x2C                                    Values are separated by ,
  # dsRecTypeStandard:Users                 The record type we're configuring
  # 2                                       How many properties we're going to set
  # dsAttrTypeStandard:RecordName           Property 1: our users record name
  # base64:dsAttrTypeNative:ShadowHashData  Property 2: our shadow hash data

  import_file = ::File.join(Chef::Config["file_cache_path"], "#{new_resource.username}_password_dsimport")
  ::File.open(import_file, "w+", 0600) do |f|
    f.write <<~DSIMPORT
      0x0A 0x5C 0x3A 0x2C dsRecTypeStandard:Users 2 dsAttrTypeStandard:RecordName base64:dsAttrTypeNative:ShadowHashData
      #{new_resource.username}:#{::Base64.strict_encode64(shadow_hash_binary.string)}
    DSIMPORT
  end

  run_dscl("delete", "/Users/#{new_resource.username}", "ShadowHashData")
  run_dsimport(import_file, "/Local/Default", "M")
  run_dscl("create", "/Users/#{new_resource.username}", "Password", "********")
ensure
  ::File.delete(import_file) if import_file && ::File.exist?(import_file)
end

#toggle_secure_tokenObject


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# File 'lib/chef/provider/user/mac.rb', line 423

def toggle_secure_token
  # Check for this lazily as we only need to validate for these credentials
  # if we're toggling secure token.
  unless %i{admin_username admin_password secure_token_password}.all? { |p| prop_is_set?(p) }
    raise Chef::Exceptions::User, "secure_token_password, admin_username and admin_password properties are required to modify SecureToken"
  end

  cmd = (new_resource.secure_token ? %w{-secureTokenOn} : %w{-secureTokenOff})
  cmd += [new_resource.username, "-password", new_resource.secure_token_password]
  cmd += ["-adminUser", new_resource.admin_username]
  cmd += ["-adminPassword", new_resource.admin_password]

  # sysadminctl doesn't exit with a non-zero exit code if it encounters
  # a problem. We'll check stderr and make sure we see that it finished
  res = run_sysadminctl(cmd)
  unless /done/.match?(res.downcase)
    raise Chef::Exceptions::User, "error when modifying SecureToken: #{res}"
  end

  # HACK: When SecureToken is enabled or disabled it requires the user
  # password in plaintext, which it verifies and uses as a key. It also
  # takes the liberty of _rehashing_ the password with a random salt and
  # iterations count and saves it back into the user ShadowHashData.
  #
  # Therefore, if we're configuring a user based upon existing shadow
  # hash data we'll have to set the password again so that future runs
  # of the client don't show password drift.
  set_password if prop_is_set?(:salt)
end

#unlock_userObject


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# File 'lib/chef/provider/user/mac.rb', line 333

def unlock_user
  auth_string = user_plist[:auth_authority].reject! { |tag| tag == ";DisabledUser;" }.join.strip

  run_dscl("create", "/Users/#{new_resource.username}", "AuthenticationAuthority", auth_string)

  reload_user_plist
end

#user_group_diverged?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/provider/user/mac.rb', line 453

def user_group_diverged?
  return false unless prop_is_set?(:gid)

  group_name, group_id = user_group_info
  current_resource.gid != group_id.to_i
end

#user_group_infoObject

Attempt to resolve the group name, gid, and the action required for associated group resource. If a group exists we'll modify it, otherwise create it.


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# File 'lib/chef/provider/user/mac.rb', line 395

def user_group_info
  @user_group_info ||= if new_resource.gid.is_a?(String)
                         begin
                           g = Etc.getgrnam(new_resource.gid)
                           [g.name, g.gid.to_s, :modify]
                         rescue
                           [new_resource.gid, nil, :create]
                         end
                       else
                         begin
                           g = Etc.getgrgid(new_resource.gid)
                           [g.name, g.gid.to_s, :modify]
                         rescue
                           [g.username, nil, :create]
                         end
                       end
end

#wait_for_userObject


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# File 'lib/chef/provider/user/mac.rb', line 587

def wait_for_user
  timeout = Time.now + 5

  loop do

    run_dscl("read", "/Users/#{new_resource.username}", "ShadowHashData")
    break
  rescue Chef::Exceptions::DsclCommandFailed => e
    if Time.now < timeout
      sleep 0.1
    else
      raise Chef::Exceptions::User, e.message
    end

  end
end