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# Copyright (C) 2003-2005 Tresys Technology, LLC
# see file 'COPYING' for use and warranty information
# TCL/TK GUI for SE Linux policy analysis
# Requires tcl and tk 8.3+, with BWidgets 1.4.1 or greater
##############################################################
# ::Apol_Perms_Map
#
# Permissions map namespace.
##############################################################
namespace eval Apol_Perms_Map {
# Widgets for permissions mappings dialog
variable perms_mappings_lb
variable class_listbox
variable b_save
variable b_saveas_Dflt
variable perm_mappings_Dlg
set perm_mappings_Dlg .perm_mappings_Dlg
variable saveChanges_Dialog
set saveChanges_Dialog .saveChanges_Dialog
# list to hold the object classes from the permissions map
variable mls_classes_list ""
variable undefined_perm_classes ""
# holds permission map information for object class
variable mls_base_perms_array
variable perm_weights_array
# holds the selinux permissions for each class from the permission map
variable selinux_perms_array
# MLS base permissions definitions
variable mls_read "r"
variable mls_write "w"
variable mls_both "b"
variable mls_none "n"
variable mls_unknown "u"
# Indicators for changes to perm map
variable edit_flag 0
variable saved_flag 0
# Kepp track of loaded vs currently being edited perm map file name
variable loaded_pmap ""
variable edited_pmap ""
variable title_display ""
variable is_mls_loaded 0
# Flag var used to indicate that the current perm map is the default.
variable dflt_pmap_flg 0
variable system_dflt_flg 0
variable user_default_pmap "[file join "$::env(HOME)" ".apol_perm_mapping"]"
# Default pmap directory is defined at initialization
variable sys_dflt_pmap_dir ""
variable dflt_pmap_display "User Default Permission Map"
variable sys_dflt_pmap_display "System Default Permission Map (Read-Only)"
# Return value to indicate that perm map loaded successfully, but there were warnings
variable warning_return_val "-2"
variable saveChanges_Dialog_ans ""
variable selected_class_idx "-1"
variable perm_map_id "apol_perm_mapping_ver"
variable perm_map_dflt "apol_perm_mapping"
# Tag variable
variable undefined_tag UNDEFINED
# Used to hold the pathname of the spin box which has the input focus to provide for its'
# modify command. This is not the most elegant way, but we are forced to do this because
# of the limitations in the BWidget spinbox where the modify command doesn't provide the
# pathname of the window to which the event was reported.
variable spinbox_pathname ""
variable default_weight 1
}
################################
# Private functions #
################################
##########################################################################
# ::determine_loaded_pmap --
# - initializes perm map editor GUI variables;
# - Called before displaying perm map editor GUI
proc Apol_Perms_Map::determine_loaded_pmap { } {
variable dflt_pmap_flg
variable system_dflt_flg
variable loaded_pmap
variable user_default_pmap
variable sys_dflt_pmap_dir
variable title_display
variable is_mls_loaded
set sys_dflt_pmap_dir [ApolTop::get_install_dir]
set Apol_Perms_Map::edit_flag 0
if {[string equal $loaded_pmap $user_default_pmap]} {
set dflt_pmap_flg 1
set system_dflt_flg 0
set title_display $Apol_Perms_Map::dflt_pmap_display
} elseif {[string equal [file dirname $loaded_pmap] $sys_dflt_pmap_dir]} {
set system_dflt_flg 1
set dflt_pmap_flg 0
set title_display $Apol_Perms_Map::sys_dflt_pmap_display
} elseif {$is_mls_loaded} {
set dflt_pmap_flg 0
set system_dflt_flg 0
set title_display "Permission map generated from $Apol_Perms_Map::loaded_pmap"
} else {
set dflt_pmap_flg 0
set system_dflt_flg 0
set title_display $Apol_Perms_Map::loaded_pmap
}
return 0
}
########################################################################
# ::set_to_edited_state --
# - Called by the perm map editor GUI after an edit.
proc Apol_Perms_Map::set_to_edited_state {} {
variable b_save
variable b_saveas_Dflt
variable dflt_pmap_flg
variable system_dflt_flg
if {!$system_dflt_flg} {
$b_save configure -state normal
}
if {!$dflt_pmap_flg} {
$b_saveas_Dflt configure -state normal
}
set Apol_Perms_Map::edit_flag 1
set Apol_Perms_Map::saved_flag 0
return 0
}
########################################################################
# ::set_to_unedited_state --
# - Called by the perm map editor GUI to refresh edit state.
proc Apol_Perms_Map::set_to_unedited_state {} {
variable b_save
variable b_saveas_Dflt
variable dflt_pmap_flg
variable system_dflt_flg
if {$dflt_pmap_flg} {
$b_saveas_Dflt configure -state disabled
} else {
$b_saveas_Dflt configure -state normal
}
$b_save configure -state disabled
set Apol_Perms_Map::edit_flag 0
return 0
}
###############################################################
# ::save_pmap_as_dflt_Dlg --
# - Saves a permission map to the users' default location
# (i.e $HOME/.apol_perm_mapping)
# - Called by perm map editor GUI
proc Apol_Perms_Map::save_pmap_as_dflt_Dlg {parentDlg} {
variable title_display
variable user_default_pmap
variable system_dflt_flg
variable dflt_pmap_flg
variable saved_flag
variable edited_pmap
variable edit_flag
if {$user_default_pmap != ""} {
if {$edit_flag} {
set rt [catch {Apol_Perms_Map::write_edited_pmap_to_file $user_default_pmap} err]
} else {
set rt [catch {Apol_Perms_Map::save_permission_map $user_default_pmap} err]
}
if {$rt != 0} {
tk_messageBox -icon error -type ok -title "Error" -message "$err" -parent $parentDlg
return -1
}
# indicate that user has saved this as his/her default perm map
set dflt_pmap_flg 1
set system_dflt_flg 0
set saved_flag 1
set edited_pmap $user_default_pmap
set edit_flag 0
# Change the display name
set title_display $Apol_Perms_Map::dflt_pmap_display
if { [winfo exists $Apol_Perms_Map::perm_mappings_Dlg] } {
wm title $Apol_Perms_Map::perm_mappings_Dlg "Edit Permissions Mappings: $Apol_Perms_Map::title_display"
}
Apol_Perms_Map::set_to_unedited_state
}
return 0
}
########################################################################
# ::save_pmap_as_Dlg --
# - Saves a permission map as any given file.
# - Called by perm map editor GUI
proc Apol_Perms_Map::save_pmap_as_Dlg {parentDlg} {
variable title_display
variable edited_pmap
variable dflt_pmap_flg
variable system_dflt_flg
variable saved_flag
variable edit_flag
variable user_default_pmap
set pmap_file ""
set types {
{"All files" *}
}
set pmap_file [tk_getSaveFile -title "Save As?" -filetypes $types -parent $parentDlg]
if {$pmap_file != ""} {
# Check if this is being saved as the users' default perm map.
if {$pmap_file == $user_default_pmap} {
set rt [Apol_Perms_Map::save_pmap_as_dflt_Dlg $parentDlg]
if {$rt != 0} {
return -1
}
} else {
if {$edit_flag} {
set rt [catch {Apol_Perms_Map::write_edited_pmap_to_file $pmap_file} err]
} else {
set rt [catch {Apol_Perms_Map::save_permission_map $pmap_file} err]
}
if {$rt != 0} {
tk_messageBox -icon error -type ok -title "Error" -message "$err"
return -1
}
set edit_flag 0
set dflt_pmap_flg 0
set system_dflt_flg 0
set saved_flag 1
set edited_pmap $pmap_file
set title_display $pmap_file
wm title $Apol_Perms_Map::perm_mappings_Dlg "Edit Permissions Mappings: $Apol_Perms_Map::title_display"
Apol_Perms_Map::set_to_unedited_state
}
} else {
# else indicate that the user has hit the cancel button
return 1
}
return 0
}
###################################################################
# ::save_perm_map_Dlg
# - Called by perm map editor GUI
proc Apol_Perms_Map::save_perm_map_Dlg {parentDlg} {
variable title_display
variable user_default_pmap
variable dflt_pmap_display
variable b_save
variable edit_flag
variable saved_flag
variable edited_pmap
if {!$edit_flag} {
# No changes to apply
return 0
}
if {$title_display == $dflt_pmap_display} {
set fileName $user_default_pmap
} else {
set fileName $edited_pmap
}
# Load the changes into memory
set rt [catch {Apol_Perms_Map::load_pmap_changes} err]
if {$rt != 0} {
tk_messageBox -icon error -type ok -title "Error" -message "$err"
return -1
}
set rt [catch {Apol_Perms_Map::save_permission_map $fileName} err]
if {$rt != 0} {
tk_messageBox -icon error -type ok -title "Error" -message "$err"
return -1
}
$b_save configure -state disabled
set edit_flag 0
set saved_flag 1
set edited_pmap $fileName
return 0
}
########################################################################
# ::close_Dlg --
# -
proc Apol_Perms_Map::close_Dlg {} {
variable edit_flag
if {$edit_flag} {
set ans [tk_messageBox -icon question -type yesno -title "Exit Perm Map Editor?" \
-parent $Apol_Perms_Map::perm_mappings_Dlg \
-message "There were unsaved changes to the perm map. \
Exit without saving changes to the perm map?"]
if {$ans == "no"} {
return
}
}
set Apol_Perms_Map::selected_class_idx "-1"
set saved_flag 0
if {[winfo exists $Apol_Perms_Map::perm_mappings_Dlg]} {
destroy $Apol_Perms_Map::perm_mappings_Dlg
}
return 0
}
########################################################################
# ::free_perms_mappings_vars --
# - Resets all TCL variables related to the permission map.
proc Apol_Perms_Map::free_perms_mappings_vars { } {
variable mls_base_perms_array
variable perm_weights_array
variable selinux_perms_array
variable mls_classes_list
variable undefined_perm_classes
# Reset permissions mappings variables
set mls_classes_list ""
set undefined_perm_classes ""
array unset mls_base_perms_array
array unset perm_weights_array
array unset selinux_perms_array
return 0
}
########################################################################
# ::init_perms_mappings_vars --
# -
proc Apol_Perms_Map::init_perms_mappings_vars { } {
variable mls_base_perms_array
variable selinux_perms_array
variable mls_classes_list
variable loaded_pmap
variable undefined_perm_classes
variable perm_weights_array
variable default_weight
set rt [catch {set pmap_loaded [Apol_Perms_Map::is_pmap_loaded]} err]
if {$rt != 0} {
return -code error $err
}
# If the permission mappings are not loaded return error
if {!$pmap_loaded} {
return -code error "Permission mappings are not loaded!"
}
Apol_Perms_Map::free_perms_mappings_vars
set rt [catch {set perm_map [Apol_Perms_Map::get_perm_map]} err]
if {$rt != 0} {
return -code error $err
}
# Get the number of classes from the perm map list and then remove it
set num_classes [lindex $perm_map 0]
if {$num_classes < 1} {
return -code error "There were no classes retrieved from the permission map."
}
set perm_map [lreplace $perm_map 0 0]
set i 0
for {set j 0} {$j < $num_classes} {incr j} {
set undefined_flg 0
set class [lindex $perm_map $i]
set mls_classes_list [lappend mls_classes_list $class]
incr i
set num_perms [lindex $perm_map $i]
set se_perms ""
for {set k 0} {$k < $num_perms} {incr k} {
incr i
set se_perm [lindex $perm_map $i]
set se_perms [lappend se_perms $se_perm]
incr i
set mls_perm [lindex $perm_map $i]
# Set the default values for our perm map arrays
set mls_base_perms_array($class,$se_perm) $mls_perm
# Increment to the perm weight value
incr i
if {!$undefined_flg && [Apol_Perms_Map::is_mls_perm_undefined $mls_base_perms_array($class,$se_perm)]} {
set undefined_flg 1
set undefined_perm_classes [lappend undefined_perm_classes $class]
}
# Set the perm weight value. Set weight to default_weight for any unmapped permissions.
if {[Apol_Perms_Map::is_mls_perm_undefined $mls_base_perms_array($class,$se_perm)]} {
set perm_weights_array($class,$se_perm) $default_weight
} else {
set perm_weight [lindex $perm_map $i]
set perm_weights_array($class,$se_perm) $perm_weight
}
}
set selinux_perms_array($class) [lsort $se_perms]
# Increment to the next object class
incr i
}
set mls_classes_list [lsort $mls_classes_list]
return 0
}
########################################################################
# ::change_perm_weighting --
# - Called when the user hits the up/down arrow in the weighting
# spinbox.
#
proc Apol_Perms_Map::change_perm_weighting {} {
variable perm_weights_array
variable spinbox_pathname
set spin_path $spinbox_pathname
if {$spin_path == ""} {
puts "Could not get spinbox pathname."
return -1
}
# getvalue returns the index of the current text in the spinbox starting from 0.
# So, the actual weight value will always be the index + 1.
set spin_value [expr [$spin_path getvalue] + 1]
if {$spin_value == -1} {
puts "Spin value not found in the range of values"
return -1
}
# The name of the class permission has been embedded in the pathname of
# the spinbox widget, instead of holding these in some global data structure
# like a tcl array, which would be fairly large.
set idx [string last ":" $spin_path]
if {$idx == -1} {
tk_messageBox -icon error -type ok -title "Error" \
-message "Error determinig class permission."
return -1
}
set perm [string range $spin_path [expr $idx + 1] end]
set tmp_str [string range $spin_path 0 [expr $idx - 1]]
set idx [string last ":" $tmp_str]
if {$idx == -1 } {
tk_messageBox -icon error -type ok -title "Error" \
-message "Error determinig class."
return -1
}
set class [string range $tmp_str [expr $idx + 1] end]
set perm_weights_array($class,$perm) $spin_value
Apol_Perms_Map::set_to_edited_state
return 0
}
########################################################################
# ::embed_mls_perms_widgets --
# - Embeds mls base permission radionbuttons for an object class'
# selinux permission.
#
proc Apol_Perms_Map::embed_mls_perms_widgets {list_b class selinux_perm} {
variable perm_weights_array
# Frames
set frame [frame $list_b.f:$selinux_perm -bd 0 -bg white]
set lbl_frame [frame $frame.lbl_frame:$selinux_perm -width 20 -bd 1 -bg white]
set lbl1 [label $lbl_frame.lbl1:$selinux_perm -bg white -justify left -width 20 -anchor nw]
set lbl2 [label $lbl_frame.lbl2:$selinux_perm -bg white -justify left -width 5 -text "--->"]
set cb_frame [frame $frame.cb_frame:$selinux_perm -width 10 -bd 1 -bg white]
set spin_frame [frame $frame.spin_frame:$selinux_perm -width 10 -bd 0 -bg white]
# Radiobuttons. Here we are embedding selinux and mls permissions into the pathname
# in order to make them unique radiobuttons.
set cb_read [radiobutton $cb_frame.read:$selinux_perm -bg white -value $Apol_Perms_Map::mls_read -text "Read" \
-highlightthickness 0 \
-variable Apol_Perms_Map::mls_base_perms_array($class,$selinux_perm) \
-command Apol_Perms_Map::set_to_edited_state]
set cb_write [radiobutton $cb_frame.write:$selinux_perm -bg white -value $Apol_Perms_Map::mls_write -text "Write" \
-highlightthickness 0 \
-variable Apol_Perms_Map::mls_base_perms_array($class,$selinux_perm) \
-command Apol_Perms_Map::set_to_edited_state]
set cb_both [radiobutton $cb_frame.both:$selinux_perm -bg white -value $Apol_Perms_Map::mls_both -text "Both" \
-highlightthickness 0 \
-variable Apol_Perms_Map::mls_base_perms_array($class,$selinux_perm) \
-command Apol_Perms_Map::set_to_edited_state]
set cb_none [radiobutton $cb_frame.none:$selinux_perm -bg white -value $Apol_Perms_Map::mls_none -text "None" \
-highlightthickness 0 \
-variable Apol_Perms_Map::mls_base_perms_array($class,$selinux_perm) \
-command Apol_Perms_Map::set_to_edited_state]
set lbl_weight [Label $spin_frame.lbl_weight:$class:$selinux_perm -bg white \
-text "Weight:" \
-padx 10]
# Spin box for perm map weighting
set spinbox_weight [SpinBox $spin_frame.spinbox_weight:$class:$selinux_perm -bg white \
-range [list 1 10 1] \
-editable 0 -entrybg white -width 6 \
-helptext "Specify a weight (importance) for the permission" \
-modifycmd {Apol_Perms_Map::change_perm_weighting}]
$spinbox_weight setvalue @[expr $perm_weights_array($class,$selinux_perm) - 1]
# We bind to the enter and leave event in order to hold the pathname of the entered spinbox.
# We use this pathname in the modify command of the spinbox widget. This is not the most
# elegant way, but we are force to do this because of the limitations in the BWidget spinbox
# where the modify command doesn't provide the pathname of the window to which the event was
# reported.
bind $spinbox_weight <Enter> {set Apol_Perms_Map::spinbox_pathname %W}
bind $spinbox_weight <Leave> {set Apol_Perms_Map::spinbox_pathname ""}
# Placing widgets
pack $frame -side left -anchor nw -expand yes
pack $lbl_frame $cb_frame -side left -anchor nw -expand yes
pack $spin_frame -side left -padx 15 -anchor nw
pack $lbl1 $lbl2 -side left -anchor nw
pack $cb_read $cb_write $cb_both $cb_none -side left -anchor nw
pack $lbl_weight $spinbox_weight -side left -anchor nw
$frame configure -height 8
if {[Apol_Perms_Map::is_mls_perm_undefined $Apol_Perms_Map::mls_base_perms_array($class,$selinux_perm)]} {
$lbl1 configure -text "$selinux_perm *" -fg red
#$cb_read configure -state disabled
#$cb_write configure -state disabled
#$cb_both configure -state disabled
#$cb_none configure -state disabled
#$spinbox_weight configure -state disabled
} else {
$lbl1 configure -text "$selinux_perm"
}
# Return the pathname of the frame to embed.
return $frame
}
# ------------------------------------------------------------------------------
# Command Apol_Perms_Map::clear_perms_text
# ------------------------------------------------------------------------------
proc Apol_Perms_Map::clear_perms_text {} {
variable perms_mappings_lb
# Enable the text widget.
$perms_mappings_lb configure -state normal
# Clear the text widget and any embedded windows
foreach emb_win [$perms_mappings_lb window names] {
if { [winfo exists $emb_win] } {
set rt [catch {destroy $emb_win} err]
if {$rt != 0} {
tk_messageBox -icon error -type ok -title "Error" \
-message "$err"
return -1
}
}
}
$perms_mappings_lb delete 1.0 end
return 0
}
########################################################################
# ::render_perm_mappings --
# - Queries for permissions defined for a given class and then
# embeds mls base permission radionbuttons for each permission.
#
proc Apol_Perms_Map::render_perm_mappings {} {
variable perm_mappings_Dlg
variable perms_mappings_lb
variable selinux_perms_array
variable selected_class_idx
variable class_listbox
set selected_class_idx [$class_listbox curselection]
if {$selected_class_idx == ""} {
return -1
}
set class_name [$class_listbox get $selected_class_idx]
if {$class_name == ""} {
tk_messageBox -icon error -type ok -title "Error" -message "Empty class provided."
return -1
}
Apol_Perms_Map::clear_perms_text
update idletasks
# If the class name has a trailing '*', then remove it.
set class_name [string trimright $class_name " *"]
set selinux_perms_list $selinux_perms_array($class_name)
foreach selinux_perm $selinux_perms_list {
$perms_mappings_lb window create end -window [Apol_Perms_Map::embed_mls_perms_widgets $perms_mappings_lb $class_name $selinux_perm]
$perms_mappings_lb insert end "\n\n"
}
$perms_mappings_lb tag configure $Apol_Perms_Map::undefined_tag -foreground red
# Disable the text widget.
$perms_mappings_lb configure -state disabled
return 0
}
########################################################################
# ::refresh_perm_mappings --
# - Refreshes perm mappings displayed after a perm map has been
# applied and/or saved.
#
proc Apol_Perms_Map::refresh_perm_mappings { } {
variable selected_class_idx
set sel_idx [$Apol_Perms_Map::class_listbox curselection]
Apol_Perms_Map::free_perms_mappings_vars
set rt [catch {Apol_Perms_Map::init_perms_mappings_vars} err]
if {$rt != 0} {
return -code error $err
}
if {$sel_idx != ""} {
set rt [catch {Apol_Perms_Map::render_perm_mappings} err]
if {$rt != 0} {
return -code error $err
}
$Apol_Perms_Map::class_listbox selection set [$Apol_Perms_Map::class_listbox index $sel_idx]
set selected_class_idx [$Apol_Perms_Map::class_listbox curselection]
}
return 0
}
########################################################################
# ::indicate_undef_perm_classes --
# - Highlights object classes in the map that have selinux permissions
# which are not defined in the permission map file.
#
proc Apol_Perms_Map::indicate_undef_perm_classes {class_listbox} {
variable mls_classes_list
variable undefined_perm_classes
# Object classes with unmapped permissions should have a '*'.
foreach undef_class $undefined_perm_classes {
set idx [lsearch -exact $mls_classes_list $undef_class]
if {$idx != -1} {
set mls_classes_list [lreplace $mls_classes_list $idx $idx "[lindex $mls_classes_list $idx] *"]
}
}
# Object classes with unmapped permissions should be red
foreach undef_class $undefined_perm_classes {
set idx [lsearch -exact $mls_classes_list "$undef_class *"]
if {$idx != -1} {
$class_listbox itemconfigure $idx -foreground red
}
}
return 0
}
########################################################################
# ::render_pmap_Dlg --
# - creates the permissions mappings dialog.
#
proc Apol_Perms_Map::render_pmap_Dlg { } {
variable perm_mappings_Dlg
variable perms_mappings_lb
variable mls_classes_list
variable class_listbox
variable dflt_pmap_flg
variable system_dflt_flg
variable title_display
variable b_save
variable b_saveas_Dflt
variable undefined_perm_classes
if {[winfo exists $perm_mappings_Dlg]} {
raise $perm_mappings_Dlg
focus -force $perm_mappings_Dlg
return 0
}
# Create the top-level dialog and subordinate widgets
toplevel $perm_mappings_Dlg
wm withdraw $perm_mappings_Dlg
wm title $perm_mappings_Dlg "Edit Permissions Mappings: $Apol_Perms_Map::title_display"
wm protocol $perm_mappings_Dlg WM_DELETE_WINDOW " "
set topf [frame $perm_mappings_Dlg.topf]
set pw1 [PanedWindow $topf.pw -side top]
set pane [$pw1 add ]
set search_pane [$pw1 add -weight 3]
set pw2 [PanedWindow $pane.pw -side left]
set class_pane [$pw2 add -weight 2]
set classes_box [TitleFrame $class_pane.tbox -text "Object Classes"]
set results_box [TitleFrame $search_pane.rbox -text "Permission Mappings"]
pack $classes_box -padx 2 -side left -fill both -expand yes
pack $results_box -pady 2 -padx 2 -fill both -expand yes
pack $pw1 -fill both -expand yes
pack $pw2 -fill both -expand yes
pack $topf -fill both -expand yes -padx 10 -pady 10
set sw_class [ScrolledWindow [$classes_box getframe].sw -auto none]
set class_listbox [listbox [$sw_class getframe].lb -height 10 -width 20 -highlightthickness 0 \
-bg white -selectmode single -exportselection 0 -listvar Apol_Perms_Map::mls_classes_list]
if {$undefined_perm_classes != ""} {
set rlbl_frame [frame [$results_box getframe].rlbl_frame]
set rlbl_1 [label $rlbl_frame.rlbl_1 -text "*" -font $ApolTop::text_font -fg red]
set rlbl_2 [label $rlbl_frame.rlbl_2 -text " - Undefined permission mapping(s)" -font $ApolTop::text_font]
}
$sw_class setwidget $class_listbox
bindtags $class_listbox [linsert [bindtags $class_listbox] 3 permMap_list_Tag]
bind permMap_list_Tag <<ListboxSelect>> {Apol_Perms_Map::render_perm_mappings}
pack $sw_class -fill both -expand yes -side top
if {$undefined_perm_classes != ""} {
pack $rlbl_frame -side bottom -anchor nw -padx 5
pack $rlbl_1 -side left -anchor nw
pack $rlbl_2 -side left -anchor nw -fill x -expand yes
}
set sw_list [ScrolledWindow [$results_box getframe].sw_c -auto none]
set perms_mappings_lb [text [$results_box getframe].perms_mappings_lb \
-cursor $ApolTop::prevCursor \
-bg white -font $ApolTop::text_font]
$sw_list setwidget $perms_mappings_lb
set botf [frame $perm_mappings_Dlg.botf]
set b_exit [button $botf.b_exit -text "Exit" -width 8 -command {Apol_Perms_Map::close_Dlg}]
set b_save [button $botf.b_save -text "Save and Load Changes" -width 20 -command {Apol_Perms_Map::save_perm_map_Dlg $Apol_Perms_Map::perm_mappings_Dlg}]
set b_saveas [button $botf.b_saveas -text "Save As..." -width 8 -command {Apol_Perms_Map::save_pmap_as_Dlg $Apol_Perms_Map::perm_mappings_Dlg}]
set b_saveas_Dflt [button $botf.b_saveas_Dflt -text "Save As User Default" -width 16 -command {Apol_Perms_Map::save_pmap_as_dflt_Dlg $Apol_Perms_Map::perm_mappings_Dlg}]
pack $sw_list -fill both -expand yes
pack $b_save $b_saveas $b_saveas_Dflt $b_exit -side left -padx 5 -pady 5 -anchor center -expand yes
pack $botf -side left -expand yes -anchor center
# Configure top-level dialog specifications
set width 800
set height 600
wm geom $perm_mappings_Dlg ${width}x${height}
wm deiconify $perm_mappings_Dlg
focus $perm_mappings_Dlg
wm protocol $perm_mappings_Dlg WM_DELETE_WINDOW "Apol_Perms_Map::close_Dlg"
return 0
}
########################################################################
# ::read_next_line -- Reads the next line from a file channel and then
# splits the line into tokens. Uses call-by-reference.
# Modifies the local variable(s) in the caller's environment.
#
proc Apol_Perms_Map::read_next_line {file_channel line_num elements} {
upvar 1 $file_channel f
upvar 1 $line_num line_no
upvar 1 $elements line_elements
# Read next line. Ignore empty lines/commments while also checking for EOF
while {[eof $f] != 1} {
gets $f line
incr line_no
if {[eof $f] && $line == ""} {
return -1
}
set tline [string trim $line]
# If the line is a comment line, simply ignore and read the next line
# ONLY if the current line is not the EOF line.
if {[string compare -length 1 $tline "#"] == 0 && [eof $f] != 1} {
continue
} elseif {[string compare -length 1 $tline "#"] == 0 && [eof $f]} {
return -1
}
set line_elements [split $tline]
break
}
# Make sure none of the tokens from the split are NULL; if so, remove from token list.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
if {[lindex $line_elements $i] == "" || [string is space [lindex $line_elements $i]]} {
set line_elements [lreplace $line_elements $i $i]
}
}
set i 0
foreach element $line_elements {
if {[string equal $element ""] || [string is space $element]} {
set idx [lsearch -exact $line_elements $element]
set line_elements [lreplace $line_elements $idx $idx]
}
incr i
}
return 0
}
########################################################################
# ::reformat_line -- Reformats a line so that each element can be seperated
# into tokens. Modifies the local variable(s) in the
# caller's environment.
#
proc Apol_Perms_Map::reformat_line {elements reformatted_flag} {
upvar 1 $elements line_elements
upvar 1 $reformatted_flag string_reformatted
# Re-create the line elements into a string seperated by a single space char.
set tline [join $line_elements]
set line_elements [split $tline ":"]
if {$line_elements != ""} {
# Trim whitespace from each token.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
set line_elements [lreplace $line_elements $i $i [string trim [lindex $line_elements $i]]]
}
# Re-format line into a string where each token is seperated by a space character.
set tline [join $line_elements " : "]
}
set line_elements [split $tline "\{"]
if {$line_elements != ""} {
# Trim whitespace from each token.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
set line_elements [lreplace $line_elements $i $i [string trim [lindex $line_elements $i]]]
}
# Re-format line into a string where each token is seperated by a space character.
set tline [join $line_elements " \{ "]
}
set line_elements [split $tline "\}"]
if {$line_elements != ""} {
# Trim whitespace from each token.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
set line_elements [lreplace $line_elements $i $i [string trim [lindex $line_elements $i]]]
}
# Re-format line into a string where each token is seperated by a space character.
set tline [join $line_elements " \} "]
}
# Now that the line has been forced into the format we want (i.e. whitespace seperating each line element),
# tokenize line into a list by splitting line at each white-space char.
set line_elements [split $tline]
# Make sure none of the tokens from the split are empty; if so, remove from token list.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
if {[lindex $line_elements $i] == ""} {
set line_elements [lreplace $line_elements $i $i]
}
}
set string_reformatted 1
return 0
}
########################################################################
# ::parse_mls_perm --
# - This procedure parses
# Modifies the local variable(s) in the caller's environment.
#
proc Apol_Perms_Map::parse_mls_perm {identifier se_perm elements_list file_channel line_num perm_map_list reformatted} {
# MLS base permissions
variable mls_read
variable mls_write
variable mls_both
variable mls_none
variable mls_unknown
# links to variables in caller. Used to implement call-by-reference on variables in the calling function.
upvar 1 $elements_list line_elements
upvar 1 $file_channel f
upvar 1 $line_num line_no
upvar 1 $perm_map_list perm_map
upvar 1 $reformatted string_reformatted
while {1} {
# Check for more elements on the line.
if {[llength $line_elements] >= 1} {
if {!$string_reformatted} {
Apol_Perms_Map::reformat_line "line_elements" "string_reformatted"
}
# When we get to the mls base permission part, we need to handle the case of permissions within brackets.
if {[lindex $line_elements 0] != "\{"} {
switch [lindex $line_elements 0] {
"read" {
lappend perm_map "$se_perm $mls_read"
}
"write" {
lappend perm_map "$se_perm $mls_write"
}
"none" {
lappend perm_map "$se_perm $mls_none"
}
default {
puts "Warning:Unknown mls base permission [lindex $line_elements 0] encountered at line: $line_no."
lappend perm_map "$se_perm $mls_unknown"
}
}
set line_elements [lreplace $line_elements 0 0]
} else {
# Remove this from our line elements list.
set line_elements [lreplace $line_elements 0 0]
set first_mls_flag 0
set sec_mls_flag 0
while {1} {
# Check for more elements on the line.
if {[llength $line_elements] >= 1} {
# First check for a close brace, which would mean that we've come to the end of this statement, so break.
if {[lindex $line_elements 0] == "\}"} {
if {$first_mls_flag && $sec_mls_flag} {
# If the first token starts with an open bracket, then we now parse for read/write permission.
lappend perm_map "$se_perm $mls_both"
} elseif {$first_mls_flag} {
switch $first_perm {
"read" {
lappend perm_map "$se_perm $mls_read"
}
"write" {
lappend perm_map "$se_perm $mls_write"
}
"none" {
lappend perm_map "$se_perm $mls_none"
}
default {
puts "Warning:Unknown mls base permission [lindex $line_elements 0] encountered at line: $line_no."
lappend perm_map "$se_perm $mls_unknown"
}
}
} else {
lappend perm_map "$se_perm $mls_none"
}
set line_elements [lreplace $line_elements 0 0]
break
}
if {$first_mls_flag && $sec_mls_flag} {
puts "Error at line: $line_no. Expected a close brace, but got \'[lindex $line_elements 0].\'"
return -1
}
if {!$first_mls_flag} {
# Hold onto the first perm so we can match check for duplicate.
set first_perm [lindex $line_elements 0]
set line_elements [lreplace $line_elements 0 0]
set first_mls_flag 1
}
if {$first_mls_flag && !$sec_mls_flag} {
if {$first_perm == "read" || $first_perm == "write"} {
if {[lindex $line_elements 0] == "read" || [lindex $line_elements 0] == "write"} {
if {[lindex $line_elements 0] == $first_perm} {
puts "Duplicate mls base permission [lindex $line_elements 0] encountered."
return -1
}
set line_elements [lreplace $line_elements 0 0]
set sec_mls_flag 1
} else {
puts "At line: $line_no, unknown mls base permission [lindex $line_elements 0] encountered."
return -1
}
} else {
puts "At line: $line_no, incorrect mls base permission [lindex $line_elements 0]."
return -1
}
}
} else {
# If this line was also the end of file line, then return error.
if {[eof $f]} {
puts "End of file reached before parsing mls base permission."
return -1
}
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt != 0} {
return -1
}
}
# If this line was also the end of file line, then break.
if {[eof $f] && [llength $line_elements] < 1} {
puts "End of file reached before parsing mls base permission."
return -1
}
}
}
break
} else {
# If this line was also the end of file line, then return error.
if {[eof $f]} {
puts "End of file reached before parsing mls base permission."
return -1
}
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt != 0} {
return -1
}
# Re-initialize reformat flag
set string_reformatted 0
}
# If this line was also the end of file line, then break.
if {[eof $f] && [llength $line_elements] < 1} {
puts "End of file reached before parsing mls base permission."
return -1
}
}
return 0
}
########################################################################
# ::parse_permission_mapping --
# - This procedure parses through the permissions mappings of a
# class or common statement. Dependent upon ::load_perm_map_from_mls
# Modifies the local variable(s) in the caller's environment.
#
proc Apol_Perms_Map::parse_permission_mapping {identifier elements file_channel line_num statement_array} {
# links to variables in caller. Used to implement call-by-reference on variables in the calling function.
upvar 1 $elements line_elements
upvar 1 $file_channel f
upvar 1 $line_num line_no
upvar 1 $statement_array array_var
set string_reformatted 0
# Initialize local variables
set perm_map ""
# Now we want to look for THE OPEN BRACE. Here we also handle the case if a class/common
# statement does not have an open brace (e.g class file ). Just return 1 if this is the case.
# Return 2, if we reach the end of file while searching for the open bracket.
while {1} {
if {[llength $line_elements] >= 1} {
if {[lindex $line_elements 0] == "\{"} {
set line_elements [lreplace $line_elements 0 0]
break
} else {
return 1
}
} else {
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt == -1} {
return 2
}
}
}
while {1} {
if {[llength $line_elements] >= 1} {
# First check for a close brace, which would mean that we've come to the end of this statement, so break.
if {[lindex $line_elements 0] == "\}"} {
break
}
# We split the line and reformat it into a string that we can work with. This is because we do not want to
# assume that whitespace exits between each element of a permission map. So, to solve this and work more
# conveniently, we re-create the string with whitespace between each element.
if {!$string_reformatted} {
Apol_Perms_Map::reformat_line "line_elements" "string_reformatted"
}
# So far, all we have done is configured the line. We should still have a line element. So the next element on the
# line should be the selinux permission. Grab this and then remove from our list.
if {[lindex $line_elements 0] != ""} {
set se_perm [lindex $line_elements 0]
set line_elements [lreplace $line_elements 0 0]
} else {
puts "Error: encountered an empty selinux permission at line : $line_no"
return -1
}
# The next line element should be a colon. At this point, however, there may no longer be any
# elements left on this line, so may need to read next line
while {1} {
if {[llength $line_elements] >= 1} {
if {[string equal [lindex $line_elements 0] ":"]} {
# remove from token list.
set line_elements [lreplace $line_elements 0 0]
break
} else {
puts "Syntax error found at line: $line_no. Expected a colon, \
but got \"[lindex $line_elements 0]\""
return -1
}
} else {
# If this line was also the end of file line, then return error.
if {[eof $f]} {
puts "End of file reached before parsing mls base permission."
return -1
}
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt != 0} {
return -1
}
}
# If this line was also the end of file line, then break.
if {[eof $f] && [llength $line_elements] < 1} {
puts "End of file reached before parsing mls base permission."
return -1
}
}
# Now that we've grabbed the colon, we need to get the mls_base perm. This may be a single perm or may be a list
# of 1 or more mls_base perms. Send variable names (not a copy of the variables) in our procedure call to imitate
# a call-by-reference.
set rt [Apol_Perms_Map::parse_mls_perm $identifier $se_perm "line_elements" "f" "line_no" "perm_map" "string_reformatted"]
if {$rt != 0} {
return -1
}
set array_var($identifier) $perm_map
} else {
# If this line was also the end of file line, then return error.
if {[eof $f]} {
puts "End of file reached before parsing selinux permission."
return -1
}
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt != 0} {
return -1
}
}
# If this line was also the end of file line, then break.
if {[eof $f] && [llength $line_elements] < 1} {
puts "End of file reached before parsing selinux permission."
return -1
}
}
return 0
}
##############################################################################################################
# ::write_mls_base_perm_map_file --
# - Reads the local array variable from the caller's environment and then writes this info out to a file.
# This array must be an array indexed by CLASS_NAME and each value must
# be a TCL list of permission maps strings (i.e. { {selinuxperm1 mls_perm} {selinuxperm2 mls_perm} )... )
# e.g class_array(CLASS_NAME) $perm_map_list
# This funtion takes the following arguments:
# - classes (required): TCL array where each element is keyed by class name.
# Each element value is a list with 2 elements (i.e. selinux permission and it's mapped mls base permission)
# - pmap_file (required): pathname of the permission map file to write to. If it doesn't exist, it will be
# created.
#
proc Apol_Perms_Map::write_mls_base_perm_map_file {classes pmap_file {mls_file ""}} {
upvar 1 $classes class_info
set access [list WRONLY CREAT TRUNC]
set rt [catch {set f [::open $pmap_file $access]} err]
if {$rt != 0} {
return -code error $err
}
set rt [catch {set polversion [apol_GetPolicyVersionString]} err]
if {$rt != 0} {
return -code error $err
}
if {$mls_file == ""} {
puts $f "# Auto-generated on [clock format [clock seconds] -format "%b %d, %Y %I:%M:%S %p" -gmt 0]"
} else {
puts $f "# Auto-generated from $mls_file on [clock format [clock seconds] -format "%b %d, %Y %I:%M:%S %p" -gmt 0]"
}
puts $f "\n"
puts $f "# Policy version: $polversion"
puts $f "# Number of object classes."
puts $f "[array size class_info]"
puts $f "\n"
if {[array exists class_info]} {
set classes [array names class_info]
foreach class $classes {
set perms_list $class_info($class)
set num_perms [llength $perms_list]
puts $f "class $class $num_perms"
foreach perm $perms_list {
set split_perms [split [string trim $perm] " "]
if {[Apol_Perms_Map::is_mls_perm_undefined [lindex $split_perms 1]]} {
#puts $f [eval format {"%18.18s %5.5s"} "[lindex $split_perms 0]" "#[lindex $split_perms 1]"]
puts $f [eval format {"%18.18s %5.5s"} "#$perm"]
} else {
puts $f [eval format {"%18.18s %5.5s"} $perm]
}
}
puts $f "\n"
}
}
::close $f
return 0
}
###########################################################################
# ::write_edited_pmap_to_file --
# - Reads the current pmap state and then writes this out to a file.
proc Apol_Perms_Map::write_edited_pmap_to_file {pmap_file} {
variable mls_classes_list
variable mls_base_perms_array
variable perm_weights_array
variable selinux_perms_array
set access [list WRONLY CREAT TRUNC]
set rt [catch {set f [::open $pmap_file $access]} err]
if {$rt != 0} {
return -code error $err
}
set rt [catch {set polversion [apol_GetPolicyVersionString]} err]
if {$rt != 0} {
return -code error $err
}
puts $f "# Auto-generated on [clock format [clock seconds] -format "%b %d, %Y %I:%M:%S %p" -gmt 0]"
puts $f "\n"
puts $f "# Policy version: $polversion"
puts $f "# Number of object classes."
puts $f "[llength $mls_classes_list]"
puts $f "\n"
if {![array exists mls_base_perms_array] || ![array exists perm_weights_array] || ![array exists selinux_perms_array]} {
return -code error "Missing necessary perm map information. Cannot save changes."
}
foreach class $mls_classes_list {
# If the class name has a trailing '*', then remove it.
set class [string trimright $class " *"]
set perms_list $selinux_perms_array($class)
set num_perms [llength $perms_list]
puts $f "class $class $num_perms"
foreach perm $perms_list {
if {[Apol_Perms_Map::is_mls_perm_undefined $mls_base_perms_array($class,$perm)]} {
puts $f [eval format {"%18.18s %5.5s %5.5s"} "#$perm" "$mls_base_perms_array($class,$perm)" "$perm_weights_array($class,$perm)"]
} else {
puts $f [eval format {"%18.18s %5.5s %5.5s"} "$perm" "$mls_base_perms_array($class,$perm)" "$perm_weights_array($class,$perm)"]
}
}
puts $f "\n"
}
::close $f
return 0
}
###################################################################
# ::create_tmp_file
# - creates and returns a unique tmp file name
proc Apol_Perms_Map::create_tmp_file {} {
set chars "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
set num_chars 8
set num_tries 8
set fn_prefix "/tmp/apol-"
set mypid [pid]
for {set i 0} {$i < $num_tries} {incr i} {
set fn $fn_prefix
for {set j 0} {$j < $num_chars} {incr j} {
append fn [string index $chars [expr ([clock clicks] ^ $mypid) % 62]]
}
if {[file exists $fn]} {
# pause and try again
after 1
} else {
# Success - this is a unique temp file name, so return it
return $fn
}
}
# If we're here we failed to create the file!
puts stderr "Failed to create a unique temporary file with prefix $fn_prefix"
return -code error "Failed to create a unique temporary file with prefix $fn_prefix"
}
########################################################################
# ::is_mls_perm_undefined --
# - Determines if the mls permission is undefined.
#
proc Apol_Perms_Map::is_mls_perm_undefined {mls_perm} {
# MLS base permissions definitions
variable mls_read
variable mls_write
variable mls_both
variable mls_none
variable mls_unknown
if {[string equal $mls_perm $mls_unknown]} {
return 1
} else {
switch -exact -- $mls_perm \
$mls_read {
return 0
} \
$mls_write {
return 0
} \
$mls_both {
return 0
} \
$mls_none {
return 0
} \
default {
return 1
}
return 1
}
# Should not get here!!
return -code error "Problem determining mls base perm!!"
}
#### ####
# #
# The following are public interfaces for loading and retrieving a permission map, #
# checking if a permission map is loaded and writing out a permission map to disk, #
# as well as getting the default weight value for a class permission. #
#### ####
########################################################################
# ::is_pmap_loaded -- Checks to see if a perm map is loaded and returns
# a boolean value (1 or 0); -1 if encountered an error.
proc Apol_Perms_Map::is_pmap_loaded {} {
set rt [catch {set pmap_loaded [apol_IsPermMapLoaded]} err]
if {$rt != 0} {
return -code error $err
}
return $pmap_loaded
}
########################################################################
# ::get_perm_map -- Retrieves the currently loaded permission map as an
# encoded TCL list.
proc Apol_Perms_Map::get_perm_map {} {
set perm_map ""
set rt [catch {set pmap_loaded [Apol_Perms_Map::is_pmap_loaded]} err]
if {$rt != 0} {
return -code error $err
}
if {!$pmap_loaded} {
return -code error "Permission mappings are not loaded."
}
set rt [catch {set perm_map [apol_GetPermMap]} err]
if {$rt != 0} {
return -code error $err
}
return $perm_map
}
##########################################################################
# ::get_weight_for_class_perm -- Retrieves the weight value for an object
# class permission from the perm map.
proc Apol_Perms_Map::get_weight_for_class_perm {obj_class selinux_perm} {
variable perm_weights_array
if {[array exists perm_weights_array]} {
return $perm_weights_array($obj_class,$selinux_perm)
} else {
return ""
}
}
########################################################################
# ::load_perm_map_from_mls --
# - This procedure generates a file that contains the default
# permission mappings for apol's information flow analysis
# Calls Apol_Perms_Map::parse_permission_mapping
# This is the top-level proc for parsing an mls file and generating
# a custom permission map file. Parsing a file calls for good defensive
# programming, so with this in mind, string lengths in particular need
# to be checked so as not to cause any buffer overflows.
#
# NOTE: If there were warnings generated while loading the perm map, a warning
# value is returned. It is up to the caller to determine if warnings were
# generated by checking for this return value.
proc Apol_Perms_Map::load_perm_map_from_mls {mls_file save_file} {
variable warning_return_val
variable loaded_pmap
# if MLS FILE doesn't exist, throw error and return
if {[file exists $mls_file] == 0 } {
return -code error "$mls_file does not exist. Cannot generate permisson map file."
}
# Open the mls file for reading
set rt [catch {set f [::open $mls_file r]} err]
if {$rt != 0} {
return -code error "Cannot open $mls_file file ($rt: $err)"
}
# Initialize line number and line elements list vriables.
set line_no 0
set line_elements ""
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt != 0} {
puts "End of file reached before parsing first valid class/common statment."
return -code error "Parsing error. See stdout for more information."
}
# Check if the line read is the end of file line and if it is empty. If it is the end of file and
# there are elements on this line, then we need to parse this line before breaking out of the loop.
while {1} {
# Make sure the line starts with the 'common' or 'class' statement.
if {[string equal [lindex $line_elements 0] "common"] || [string equal [lindex $line_elements 0] "COMMON"] || [string equal [lindex $line_elements 0] "class"] || [string equal [lindex $line_elements 0] "CLASS"]} {
# Set the statement to lower case letters. We perform a string match on this later.
set statement_type [string tolower [lindex $line_elements 0]]
# Remove 'common' or 'class' statement from the token list. This should be the first element.
set line_elements [lreplace $line_elements 0 0]
# Check if the current line is the end of file line and if there are more
# elements on the line. If there are no further elements on the line, then
# this is an error, because we have not yet gathered the identifier!
if {[eof $f] && [llength $line_elements] < 1} {
puts "Error: End of file reached before gathering identifier."
return -code error "Parsing error. See stdout for more information."
}
# Now that we know there are more elements, gather THE IDENTIFIER and then remove from token list.
# A statements' starting brace may not be seperated by whitespace, but we want to
# force this format on our line. To do this, we first try to split the
# line using an open brace as the splitChar. If the split list is not empty, then we
# trim any whitespace from each element and then re-format tline into a string
# seperated by a space. Otherwise, at this point, if the split list is empty (meaning there
# were either no braces found or the line contained adjacent braces), we simply
# split the line at each white space char, remove any empty tokens and move on.
while {1} {
if {[llength $line_elements] >= 1} {
set tline [join $line_elements]
set line_elements [split $tline "\{"]
if {$line_elements != ""} {
# Trim whitespace from each token.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
set line_elements [lreplace $line_elements $i $i [string trim [lindex $line_elements $i]]]
}
# Re-create line by seperating each token with a space, an open brace and another space.
set tline [join $line_elements " \{ "]
}
# Re-tokenize line into a list by splitting line at each white-space char.
set line_elements [split $tline]
# Make sure none of the tokens from the split are empty; if so, remove from token list.
for {set i 0} {$i < [llength $line_elements]} {incr i} {
if {[lindex $line_elements $i] == ""} {
set line_elements [lreplace $line_elements $i $i]
}
}
# OK, the identifier should now be the first element. It should not be empty, but make sure.
if {[string equal [lindex $line_elements 0] "\{"]} {
puts "Error: Open bracket reached before finding an identifier."
return -code error "Parsing error. See stdout for more information."
} elseif {[lindex $line_elements 0] != ""} {
set identifier [lindex $line_elements 0]
set line_elements [lreplace $line_elements 0 0]
break
} else {
puts "Error: Could not determine the identifier for this $statement_type statement."
return -code error "Parsing error. See stdout for more information."
}
} else {
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
if {$rt != 0} {
puts "End of file reached before parsing identifier for $statement_type."
return -code error "Parsing error. See stdout for more information."
}
}
}
# Now, we are ready to parse the permission mappings based on the statement type (class/common).
# Send variable names (not a copy of the variables) in our procedure call to imitate a call-by-reference.
if {$statement_type == "common"} {
# Add identifier to array and initialize
set common_perms($identifier) ""
if {[eof $f] && [llength $line_elements] < 1} {
break
}
set rt [Apol_Perms_Map::parse_permission_mapping $identifier "line_elements" "f" "line_no" "common_perms"]
if {$rt == 1} {
# This common perm may not have any perm maps defined, so we look for another class/common statment
continue
} elseif {$rt == 2} {
# This means that a the end of file was reached, but we have a valid statement so no error.
break
} elseif {$rt != 0} {
# This means that a parse error was encountered or the end of file was reached.
puts "Error: Error parsing line: $line_no"
return -code error "Parsing error. See stdout for more information."
}
} elseif {$statement_type == "class"} {
# Add identifier to array and initialize
set class_info($identifier) ""
if {[eof $f] && [llength $line_elements] < 1} {
break
}
set rt [Apol_Perms_Map::parse_permission_mapping $identifier "line_elements" "f" "line_no" "class_info"]
if {$rt == 1} {
# This class may not have any perm maps defined, so we look for another class/common statment
continue
} elseif {$rt == 2} {
# This means that a the end of file was reached, but we have a valid statement so no error.
break
} elseif {$rt != 0} {
# This means that a parse error was encountered or the end of file was reached.
puts "Error: Error parsing line: $line_no"
return -code error "Parsing error. See stdout for more information."
}
} else {
# Should never get here, but using as a safety measure and is good defensive programming.
puts "Determined wrong statement type while trying to set permission map info."
return -code error "Parsing error. See stdout for more information."
}
}
set line_elements ""
# If this line was also the end of file line, then break.
if {[eof $f] && $line_elements == ""} {
break
}
set rt [Apol_Perms_Map::read_next_line "f" "line_no" "line_elements"]
# -1 will be returned if we reach the EOF. If we've reached the EOF, just break.
if {$rt == -1} {
break
}
}
# Expand common permissions if there are any
if {[array exists common_perms]} {
foreach class [array names class_info] {
set rt [catch {set valid_common_perm [apol_GetClassCommonPerm $class]} err]
if {$rt != 0} {
puts "Error retrieving common permissions for $class: $err"
} else {
if {$valid_common_perm != ""} {
set perms_list $class_info($class)
# See if the valid common permission from the policy is defined in the mls file
# If it is not, then just ignore.
set common_perm [array names common_perms "$valid_common_perm"]
if {$common_perm != ""} {
set comm_perms $common_perms($common_perm)
set perms_list [concat $comm_perms $perms_list]
set class_info($class) $perms_list
}
}
}
}
array unset common_perms
}
if {[array exists class_info]} {
set rt [catch {Apol_Perms_Map::write_mls_base_perm_map_file "class_info" $save_file} err]
array unset class_info
if {$rt != 0} {
return -code error $err
}
} else {
return -code error "No class information was found, so could not load perm map from the mls file."
}
::close $f
if {[file exists $save_file]} {
# now that we have a perm map located, load it.
set rt [catch {Apol_Perms_Map::load_perm_mappings $save_file} msg]
if {$rt != 0} {
if {$rt == $warning_return_val} {
return -code $warning_return_val $msg
} else {
return -code error $msg
}
}
} else {
return -code error "Could not load temporary permission map file ($save_file). File does not exist."
}
return 0
}
########################################################################
# ::load_default_perm_map --
# - Locate the default perm map and then load it. Return warnings
# flag value if there were warnings during load.
proc Apol_Perms_Map::load_default_perm_map {} {
variable loaded_pmap
variable warning_return_val
variable user_default_pmap
if {![file exists $user_default_pmap]} {
# Get the policy persion number.
set rt [catch {set policy_version [apol_GetPolicyVersionNumber]} err]
if {$rt != 0} {
return -code error $err
}
# Flag used to indicate that we already tried to locate the default perm map (apol_perm_mapping)
# Flag used to indicate that we already tried to locate the default perm map (apol_perm_mapping)
set default_flg 0
# The only perm maps we are implicitly loading are perm maps starting from policy ver12 onward.
# For any other policies, we try to load the default user perm map. If any of this fails, an
# error is returned.
if {$policy_version && $policy_version >= 12} {
set rt [catch {set pmap_file [apol_GetDefault_PermMap "$Apol_Perms_Map::perm_map_id$policy_version"]} err]
} else {
set rt [catch {set pmap_file [apol_GetDefault_PermMap $Apol_Perms_Map::perm_map_dflt]} err]
set default_flg 1
}
if {$rt != 0} {
return -code error $err
}
if {$pmap_file == ""} {
if {!$default_flg} {
set rt [catch {set pmap_file [apol_GetDefault_PermMap $Apol_Perms_Map::perm_map_dflt]} err]
if {$rt != 0} {
return -code error $err
}
if {$pmap_file == ""} {
return -code error "Could not locate system default perm map. You must explicitly load a perm map. See Advanced menu."
}
}
return -code error "Could not locate system default perm map. You must explicitly load a perm map. See Advanced menu."
}
set pmap_file [file nativename $pmap_file]
# now that we have the default perm map located, load it.
set rt [catch {Apol_Perms_Map::load_perm_mappings $pmap_file} msg]
if {$rt != 0} {
if {$rt == $warning_return_val} {
return -code $warning_return_val $msg
} else {
return -code error $msg
}
}
set loaded_pmap $pmap_file
} else {
# Set perm map pathname to default user location.
set pmap_file [file nativename $user_default_pmap]
# now that we have a perm map located, load it.
set rt [catch {Apol_Perms_Map::load_perm_mappings $pmap_file} msg]
if {$rt != 0} {
if {$rt == $warning_return_val} {
return -code $warning_return_val $msg
} else {
set ans [tk_messageBox \
-icon question \
-type yesno \
-parent $ApolTop::mainframe \
-title "Load system default permission map?" \
-message "Your default permission map ($user_default_pmap) is corrupted.\n\nWould you \
like to copy to your default permission map with the system default permission map and then load?"]
if {$ans == "yes"} {
set user_dflt_dir [file dirname $user_default_pmap]
# Copy the system default perm map to the default user location (currently, $HOME)
set rt [catch {file copy -force $pmap_file $user_dflt_dir} err]
if {$rt != 0} {
return -code error $err
}
set rt [catch {file rename -force [file join $user_dflt_dir [file tail $pmap_file]] $user_default_pmap} err]
if {$rt != 0} {
return -code error $err
}
# Set perm map pathname to default user location.
set pmap_file [file nativename $user_default_pmap]
# now that we have the perm map located, load it.
set rt [catch {Apol_Perms_Map::load_perm_mappings $pmap_file} msg]
if {$rt != 0} {
if {$rt == $warning_return_val} {
return -code $warning_return_val $msg
} else {
return -code error $msg
}
}
} else {
return -code error $msg
}
}
}
set loaded_pmap $pmap_file
}
return 0
}
########################################################################
# ::load_perm_mappings --
# - Load a perm map file into memory. Requires a policy to be opened.
proc Apol_Perms_Map::load_perm_mappings {pmap_file} {
variable loaded_pmap
variable edited_pmap
variable edit_flag
variable warning_return_val
if {$pmap_file != ""} {
set warn 0
set rt [catch {apol_LoadPermMap $pmap_file} msg]
if {$rt != 0} {
if {$rt == -2} {
set warn 1
} else {
return -code error $msg
}
}
set loaded_pmap $pmap_file
set edited_pmap $pmap_file
ApolTop::configure_edit_pmap_menu_item 1
# Update perm mapping variables
set rt [catch {Apol_Perms_Map::init_perms_mappings_vars} err]
if {$rt != 0} {
return -code error $err
}
if {$warn} {
return -code $warning_return_val $msg
}
}
return 0
}
########################################################################
# ::save_permission_map --
# - Primitive procedure for saving the currently loaded perm map
# out to disk.
#
proc Apol_Perms_Map::save_permission_map {filename} {
set rt [catch {apol_SavePermMap $filename} err]
if {$rt != 0} {
return -code error $err
}
return 0
}
########################################################################
# ::load_pmap_changes --
# - Primitive procedure for updating perm map in memory.
#
proc Apol_Perms_Map::load_pmap_changes {} {
# Create a temporary
if { [catch {set tmpfilename [Apol_Perms_Map::create_tmp_file]} err] } {
return -code error $err
}
set rt [catch {Apol_Perms_Map::write_edited_pmap_to_file $tmpfilename} err]
if {$rt != 0} {
# Delete the temporary file from disk
file delete $tmpfilename
return -code error $err
}
set rt [catch {apol_UpdatePermMap $tmpfilename} err]
if {$rt != 0} {
# Delete the temporary file from disk
file delete $tmpfilename
return -code error $err
}
# Delete the temporary file from disk
file delete $tmpfilename
return 0
}
########################################################################
# ::load_perm_map_fileDlg --
# - Called from top-level GUI Advanced menu
proc Apol_Perms_Map::load_perm_map_fileDlg {parentDlg} {
variable warning_return_val
variable is_mls_loaded
set pmap_file ""
set types {
{"All files" *}
}
set pmap_file [tk_getOpenFile -filetypes $types -title "Select Perm Map to Load..." -parent $parentDlg]
if {$pmap_file != ""} {
set rt [catch {Apol_Perms_Map::load_perm_mappings $pmap_file} err]
if {$rt != 0} {
if {$rt == $warning_return_val} {
tk_messageBox -icon warning -type ok -title "Warning" -message "$err"
} else {
tk_messageBox -icon error -type ok -title "Error" -message "$err"
return -1
}
}
set is_mls_loaded 0
if {[winfo exists $Apol_Perms_Map::perm_mappings_Dlg]} {
Apol_Perms_Map::close_Dlg
Apol_Perms_Map::display_perm_mappings_Dlg
}
}
# else the user hit cancel
return 0
}
########################################################################
# ::load_perm_map_mlsDlg --
# - Called from top-level GUI Advanced menu
proc Apol_Perms_Map::load_perm_map_mlsDlg {parentDlg} {
variable warning_return_val
variable loaded_pmap
variable is_mls_loaded
variable title_display
set types {
{"All files" *}
}
set mls_file [tk_getOpenFile -filetypes $types -title "Select mls file to convert from..." \
-initialfile "mls" -initialdir [file dirname $ApolTop::filename] -parent $parentDlg]
# Return if the user hits the cancel button
if {$mls_file == ""} {
return -1
}
# create a temp file channel with WRONLY access only!
if { [catch {set tmpfilename [Apol_Perms_Map::create_tmp_file]} err] } {
tk_messageBox -icon error -type ok -title "Error" -message "$err" -parent $parentDlg
return -1
}
if {$tmpfilename == ""} {
tk_messageBox -icon error -type ok -title "Error" -message "$err" -parent $parentDlg
return -1
}
set rt [catch {Apol_Perms_Map::load_perm_map_from_mls $mls_file $tmpfilename} err]
if {$rt != 0} {
if {$rt == $warning_return_val} {
tk_messageBox -icon warning -type ok -title "Warning" -message "$err" -parent $parentDlg
} else {
if {[file exists $tmpfilename]} {
file delete $tmpfilename
}
tk_messageBox -icon error -type ok -title "Error" -message "$err" -parent $parentDlg
return -1
}
}
# This means success, so check that the temp file exist and if so then delete it.
if {[file exists $tmpfilename]} {
file delete $tmpfilename
}
set loaded_pmap $mls_file
set is_mls_loaded 1
if {[winfo exists $Apol_Perms_Map::perm_mappings_Dlg]} {
Apol_Perms_Map::close_Dlg
Apol_Perms_Map::display_perm_mappings_Dlg
}
return 0
}
########################################################################
# ::load_default_perm_map_Dlg --
# - Called from top-level GUI Advanced menu
proc Apol_Perms_Map::load_default_perm_map_Dlg {parentDlg} {
variable warning_return_val
variable is_mls_loaded
set rt [catch {Apol_Perms_Map::load_default_perm_map} err]
if {$rt != 0} {
if {$rt == $warning_return_val} {
tk_messageBox -icon warning -type ok -title "Warning" -message "$err"
} else {
tk_messageBox -icon error -type ok -title "Error" -message "$err"
return -1
}
}
set is_mls_loaded 0
if {[winfo exists $Apol_Perms_Map::perm_mappings_Dlg]} {
Apol_Perms_Map::close_Dlg
Apol_Perms_Map::display_perm_mappings_Dlg
}
return 0
}
######################################################################################
# The following are public interfaces for creating/destroying perm map editor object #
######################################################################################
########################################################################
# ::display_perm_mappings_Dlg --
# - displays the permissions mappings dialog.
#
proc Apol_Perms_Map::display_perm_mappings_Dlg { } {
variable class_listbox
variable edit_flag
variable saved_flag
if {$saved_flag || [expr $edit_flag && !$saved_flag]} {
# The perm map was either changed but not saved OR was saved, so re-load perm mappings.
set rt [catch {Apol_Perms_Map::init_perms_mappings_vars} err]
if {$rt != 0} {
return -code error $err
}
}
Apol_Perms_Map::determine_loaded_pmap
set rt [catch {Apol_Perms_Map::render_pmap_Dlg} err]
if {$rt != 0} {
tk_messageBox -icon error -type ok -title "Error" -message "$err"
return -1
}
# Check for object classes that have undefined selinux permissions in the permission map file.
Apol_Perms_Map::indicate_undef_perm_classes $class_listbox
Apol_Perms_Map::set_to_unedited_state
return 0
}
########################################################################
# ::close --
# -
proc Apol_Perms_Map::close {parentDlg} {
variable edit_flag
variable perm_mappings_Dlg
variable perms_mappings_lb
variable selected_class_idx
Apol_Perms_Map::free_perms_mappings_vars
# Reset our edit flag.
set edit_flag 0
set selected_class_idx "-1"
if {[winfo exists $perm_mappings_Dlg]} {
if {[winfo exists $perms_mappings_lb]} {
$perms_mappings_lb delete 1.0 end
}
destroy $perm_mappings_Dlg
}
if {[winfo exists $Apol_Perms_Map::perm_mappings_Dlg]} {
destroy $Apol_Perms_Map::perm_mappings_Dlg
}
return 0
}
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