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1131 | ------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- Cheddar is a GNU GPL real-time scheduling analysis tool.
-- This program provides services to automatically check schedulability and
-- other performance criteria of real-time architecture models.
--
-- Copyright (C) 2002-2016, Frank Singhoff, Alain Plantec, Jerome Legrand
--
-- The Cheddar project was started in 2002 by
-- Frank Singhoff, Lab-STICC UMR 6285 laboratory, Université de Bretagne Occidentale
--
-- Cheddar has been published in the "Agence de Protection des Programmes/France" in 2008.
-- Since 2008, Ellidiss technologies also contributes to the development of
-- Cheddar and provides industrial support.
--
-- The full list of contributors and sponsors can be found in README.md
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
--
--
-- Contact : cheddar@listes.univ-brest.fr
--
------------------------------------------------------------------------------
-- Last update :
-- $Rev: 3561 $
-- $Date: 2020-11-02 08:25:02 +0100 (Mon, 02 Nov 2020) $
-- $Author: singhoff $
------------------------------------------------------------------------------
------------------------------------------------------------------------------
with Ada.Numerics.Elementary_Functions; use Ada.Numerics.Elementary_Functions;
with Ada.Strings; use Ada.Strings;
with Ada.Strings.Fixed; use Ada.Strings.Fixed;
with Ada.Numerics.Float_Random; use Ada.Numerics.Float_Random;
with unbounded_strings; use unbounded_strings;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with unbounded_strings; use unbounded_strings;
with Ada.Strings; use Ada.Strings;
with Ada.Text_IO.Unbounded_IO; use Ada.Text_IO.Unbounded_IO;
with Ada.Directories; use Ada.Directories;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with unbounded_strings; use unbounded_strings;
with convert_unbounded_strings;
use unbounded_strings.unbounded_string_list_package;
use unbounded_strings.strings_table_package;
with Ada.Strings; use Ada.Strings;
with Ada.Text_IO.Unbounded_IO; use Ada.Text_IO.Unbounded_IO;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
with Ada.Float_Text_IO; use Ada.Float_Text_IO;
with Dependencies; use Dependencies;
with task_dependencies; use task_dependencies;
with task_dependencies; use task_dependencies.half_dep_set;
with message_set; use message_set;
with Messages; use Messages;
with Tasks; use Tasks;
with task_set; use task_set;
with Resources; use Resources;
with resource_set; use resource_set;
with Objects; use Objects;
with convert_unbounded_strings;
use unbounded_strings.unbounded_string_list_package;
with Scheduler_Interface; use Scheduler_Interface;
with Address_Spaces; use Address_Spaces;
with address_space_set; use address_space_set;
with call_framework; use call_framework;
with Call_Framework_Interface; use Call_Framework_Interface;
use Call_Framework_Interface.Framework_Response_Package;
use Call_Framework_Interface.Framework_Request_Package;
with call_scheduling_framework; use call_scheduling_framework;
with pipe_commands; use pipe_commands;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Text_IO.Unbounded_IO; use Ada.Text_IO.Unbounded_IO;
with Ada.Directories; use Ada.Directories;
with GNAT.OS_Lib; use GNAT.OS_Lib;
with debug; use debug;
with random_tools; use random_tools;
use unbounded_strings.strings_table_package;
with architecture_factory; use architecture_factory;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
with Ada.Float_Text_IO; use Ada.Float_Text_IO;
with systems; use systems;
with Processors; use Processors;
with processor_set; use processor_set;
with Processor_Interface; use Processor_Interface;
use processor_set.generic_processor_set;
with Core_Units; use Core_Units;
use Core_Units.Core_Units_Table_Package;
with natural_util; use natural_util;
with feasibility_test.feasibility_interval;
use feasibility_test.feasibility_interval;
with integer_util; use integer_util;
use Resources.Resource_Accesses;
with float_util; use float_util;
with Ada.Characters.Latin_1; use Ada.Characters;
with Ada.Text_IO; use Ada.Text_IO;
with GNAT.String_Split; use GNAT;
with MILS_Security; use MILS_Security;
with random_tools; use random_tools;
with Memories; use Memories;
with Paes.chromosome_Data_Manipulation_t2p_and_security;
use Paes.chromosome_Data_Manipulation_t2p_and_security;
package body Paes.security_implementation is
-------------------
-- security configuration 1 (function calls - function calls) --
-- only when intra partititions communications are consider attackable
-------------------
procedure security_configuration1
(A_sys : in out systems.system;
s : in solution_t2p)
is
encrypt_addr, decrypt_addr : Unbounded_String;
capacity_encrypter, capacity_decrypter, capacity_hash : Natural;
y, j, m, finish : Integer;
A_task_name : Unbounded_String;
A_task_source : generic_task_ptr;
A_task_sink : generic_task_ptr;
begin
j := 1;
y :=
Integer
(get_number_of_task_from_processor
(A_sys.tasks,
To_Unbounded_String ("processor1")));
while (j <= genes_com) loop
finish := Index (s.chrom_com (j).source_sink, "_");
A_task_source :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
1,
finish - 1)));
A_task_sink :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
finish + 1,
Length (s.chrom_com (j).source_sink))));
m := Integer'value (To_String (A_task_source.name));
capacity_encrypter := encrypter_values (task_to_app (m));
capacity_decrypter :=
decrypter_values
(task_to_app
(m)); -- assumption capacity_encrypter=capacity_decrypter
capacity_hash := Hash_values (task_to_app (m));
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
if (s.chrom_com (j).mode = secure) then
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
y := y + 1;
put_debug
("Downgrader (Encrypter & Decrypter): " &
y'img &
" is added");
A_task_source.capacity :=
A_task_source.capacity + capacity_encrypter + Key_value;
A_task_sink.capacity :=
A_task_sink.capacity + capacity_decrypter + Key_value;
nb_bell_resolved := nb_bell_resolved + 1;
end if;
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
y := y + 1;
put_debug ("Upgrader : " & y'img & " is added");
A_task_source.capacity :=
A_task_source.capacity + capacity_hash;
A_task_sink.capacity := A_task_sink.capacity + capacity_hash;
nb_biba_resolved := nb_biba_resolved + 1;
end if;
end if;
j := j + 1;
end loop;
end security_configuration1;
---test1
---
-------------------
-- security configuration 2 (Rien - function calls) --
-------------------
procedure security_configuration2
(A_sys : in out systems.system;
s : in solution_t2p)
is
encrypt_addr, decrypt_addr : Unbounded_String;
capacity_encrypter, capacity_decrypter, capacity_hash : Natural;
y, j, m, finish : Integer;
A_task_name : Unbounded_String;
A_task_source : generic_task_ptr;
A_task_sink : generic_task_ptr;
begin
j := 1;
y :=
Integer
(get_number_of_task_from_processor
(A_sys.tasks,
To_Unbounded_String ("processor1")));
while (j <= genes_com) loop
finish := Index (s.chrom_com (j).source_sink, "_");
A_task_source :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
1,
finish - 1)));
A_task_sink :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
finish + 1,
Length (s.chrom_com (j).source_sink))));
m := Integer'value (To_String (A_task_source.name));
capacity_encrypter := encrypter_values (task_to_app (m));
capacity_decrypter := decrypter_values (task_to_app (m));
capacity_hash := Hash_values (task_to_app (m));
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
if (s.chrom_com (j).mode = secure) then
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
if
(A_task_source.address_space_name /=
A_task_sink.address_space_name)
then
y := y + 1;
put_debug
("Downgrader (Encrypter & Decrypter): " &
y'img &
" is added");
A_task_source.capacity :=
A_task_source.capacity + capacity_encrypter + Key_value;
A_task_sink.capacity :=
A_task_sink.capacity + capacity_decrypter + Key_value;
end if;
nb_bell_resolved := nb_bell_resolved + 1;
end if;
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
if
(A_task_source.address_space_name /=
A_task_sink.address_space_name)
then
y := y + 1;
put_debug ("Upgrader : " & y'img & " is added");
A_task_source.capacity :=
A_task_source.capacity + capacity_hash;
A_task_sink.capacity := A_task_sink.capacity + capacity_hash;
end if;
nb_biba_resolved := nb_biba_resolved + 1;
end if;
elsif (s.chrom_com (j).mode = nosecure) then
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
if
(A_task_source.address_space_name =
A_task_sink.address_space_name)
then
nb_bell_resolved := nb_bell_resolved + 1;
end if;
end if;
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
if
(A_task_source.address_space_name =
A_task_sink.address_space_name)
then
nb_biba_resolved := nb_biba_resolved + 1;
end if;
end if;
end if;
j := j + 1;
end loop;
end security_configuration2;
-------------------
-- security configuration 3 (rien-task without M) --
-------------------
procedure security_configuration3
(A_sys : in out systems.system;
s : in solution_t2p)
is
encrypt_addr, decrypt_addr : Unbounded_String;
capacity_encrypter, capacity_decrypter, capacity_hash : Natural;
y, j, m, finish : Integer;
dep_bell_solved : Boolean;
A_task_name : Unbounded_String;
A_task_source,
A_task_Key_source,
A_task_DW,
A_task_DW_decypt : generic_task_ptr;
A_task_sink, A_task_Key_sink : generic_task_ptr;
A_task_UP_source, A_task_UP_sink : generic_task_ptr;
begin
j := 1;
y :=
Integer
(get_number_of_task_from_processor
(A_sys.tasks,
To_Unbounded_String ("processor1")));
while (j <= genes_com) loop
finish := Index (s.chrom_com (j).source_sink, "_");
A_task_source :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
1,
finish - 1)));
A_task_sink :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
finish + 1,
Length (s.chrom_com (j).source_sink))));
m := Integer'value (To_String (A_task_source.name));
capacity_encrypter := encrypter_values (task_to_app (m));
capacity_decrypter := decrypter_values (task_to_app (m));
capacity_hash := Hash_values (task_to_app (m));
if (s.chrom_com (j).mode = secure) then
dep_bell_solved := False;
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
if
(A_task_source.address_space_name /=
A_task_sink.address_space_name)
then
-- consider the inter partition communication (adding tasks whitout multiplexing)
Put_Line ("A_task_source : " & A_task_source.name);
Put_Line ("A_task_sink : " & A_task_sink.name);
y := y + 1;
put_debug ("Downgrader (Encrypter): " & y'img & " is added");
add_task
(my_tasks => A_sys.tasks,
name => suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_source.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => capacity_encrypter,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_DW :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_DW);
y := y + 1;
put_debug
("New downgrading task (Decrypter): " &
y'img &
" is added");
add_task
(my_tasks => A_sys.tasks,
name => suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_sink.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => capacity_decrypter,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_DW_decypt :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_DW,
sink => A_task_DW_decypt);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_DW_decypt,
sink => A_task_sink);
y := y + 1;
put_debug
("New key set up task for encrypter: " &
y'img &
" is added");
add_task
(my_tasks => A_sys.tasks,
name => suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_source.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => Key_value,
period => 100000000,
deadline => 100000000,
jitter => 0,
blocking_time => 0,
priority =>
Integer'value (A_task_source.priority'img) + 1,
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_Key_source :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_Key_source,
sink => A_task_source);
y := y + 1;
put_debug
("New key set up task for decrypter: " &
y'img &
" is added");
add_task
(my_tasks => A_sys.tasks,
name => suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_sink.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => Key_value,
period => 100000000,
deadline => 100000000,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_sink.priority'img) + 1,
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_Key_sink :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_Key_sink,
sink => A_task_sink);
else
-- when there is no attackable intra communication
nb_bell_resolved := nb_bell_resolved + 1;
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
end if;
dep_bell_solved := True;
end if;
--
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
if (dep_bell_solved = False) then
-- when solving the problem of integrity, we keep the communication
-- but if there was no confidentiality problem solved, then there is already a link between the 2 tasks via DW
-- and also the case where there is no intra non-attackable communication
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
nb_biba_resolved := nb_biba_resolved + 1;
end if;
if
(A_task_source.address_space_name /=
A_task_sink.address_space_name)
then
Put_Line ("A_task_source : " & A_task_source.name);
Put_Line ("A_task_sink : " & A_task_sink.name);
y := y + 1;
put_debug ("Hash at emission : " & y'img & " is added");
add_task
(my_tasks => A_sys.tasks,
name => suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_source.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => capacity_hash,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_UP_source :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_UP_source);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_UP_source,
sink => A_task_source);
y := y + 1;
put_debug ("Hash at reception : " & y'img & " is added");
add_task
(my_tasks => A_sys.tasks,
name => suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_sink.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => capacity_hash,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_UP_sink :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_sink,
sink => A_task_UP_sink);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_UP_sink,
sink => A_task_sink);
elsif
(A_task_source.address_space_name =
A_task_sink.address_space_name) and
(dep_bell_solved = True)
then
nb_biba_resolved := nb_biba_resolved + 1;
end if;
end if;
elsif (s.chrom_com (j).mode = nosecure) then
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
if
(A_task_source.address_space_name =
A_task_sink.address_space_name)
then
nb_bell_resolved := nb_bell_resolved + 1;
end if;
end if;
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
if
(A_task_source.address_space_name =
A_task_sink.address_space_name)
then
nb_biba_resolved := nb_biba_resolved + 1;
end if;
end if;
else
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
end if;
j := j + 1;
end loop;
end security_configuration3;
-------------------
-- security configuration 4 (Rien - tasks with M) --
-------------------
procedure security_configuration4
(A_sys : in out systems.system;
s : in solution_t2p)
is
encrypt_addr, decrypt_addr : Unbounded_String;
capacity_encrypter, capacity_decrypter, capacity_hash : Natural;
y, j, i, m, k, finish : Integer;
dep_bell_solved : Boolean;
A_task_name : Unbounded_String;
A_task_source, A_task_DW_enc, A_task_DW_dec : generic_task_ptr;
A_task_sink : generic_task_ptr;
A_task_UP : generic_task_ptr;
type security_partition is
array (1 .. nb_partitions) of multiplexe_security_partition;
multiplexe_security : security_partition;
begin
y :=
Integer
(get_number_of_task_from_processor
(A_sys.tasks,
To_Unbounded_String ("processor1")));
for j in 1 .. nb_partitions loop
multiplexe_security (j).addr :=
suppress_space (To_Unbounded_String ("addr" & j'img));
multiplexe_security (j).confidentiality_capacity_enc := 0;
multiplexe_security (j).confidentiality_capacity_dec := 0;
multiplexe_security (j).integrity_capacity := 0;
end loop;
j := 1;
while (j <= genes_com) loop
finish := Index (s.chrom_com (j).source_sink, "_");
A_task_source :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
1,
finish - 1)));
A_task_sink :=
search_task
(A_sys.tasks,
suppress_space
(Unbounded_Slice
(s.chrom_com (j).source_sink,
finish + 1,
Length (s.chrom_com (j).source_sink))));
m := Integer'value (To_String (A_task_source.name));
capacity_encrypter := encrypter_values (task_to_app (m));
capacity_decrypter := decrypter_values (task_to_app (m));
capacity_hash := Hash_values (task_to_app (m));
if (s.chrom_com (j).mode = secure) then
dep_bell_solved := False;
--
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
if
(A_task_source.address_space_name /=
A_task_sink.address_space_name)
then
-- consider the inter partition communication
finish := Index (A_task_source.address_space_name, "r");
i :=
Integer'value
(To_String
(suppress_space
(Unbounded_Slice
(A_task_source.address_space_name,
finish + 1,
Length (A_task_source.address_space_name)))));
k :=
Integer'value
(To_String
(suppress_space
(Unbounded_Slice
(A_task_sink.address_space_name,
finish + 1,
Length (A_task_source.address_space_name)))));
if
(multiplexe_security (i).confidentiality_capacity_enc = 0)
then
y := y + 1;
multiplexe_security (i).tsk_confidentiality_enc := y;
multiplexe_security (i).confidentiality_capacity_enc :=
capacity_encrypter + Key_value;
add_task
(my_tasks => A_sys.tasks,
name =>
suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_source.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity =>
multiplexe_security (i).confidentiality_capacity_enc,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_DW_enc :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_DW_enc);
else
multiplexe_security (i).confidentiality_capacity_enc :=
multiplexe_security (i).confidentiality_capacity_enc +
capacity_encrypter +
Key_value;
A_task_DW_enc :=
search_task
(A_sys.tasks,
suppress_space
(To_Unbounded_String
("" &
multiplexe_security (i)
.tsk_confidentiality_enc'
img)));
A_task_DW_enc.capacity :=
multiplexe_security (i).confidentiality_capacity_enc;
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_DW_enc);
end if;
if
(multiplexe_security (k).confidentiality_capacity_dec = 0)
then
y := y + 1;
multiplexe_security (k).tsk_confidentiality_dec := y;
multiplexe_security (k).confidentiality_capacity_dec :=
capacity_decrypter + Key_value;
add_task
(my_tasks => A_sys.tasks,
name =>
suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_sink.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity =>
multiplexe_security (k).confidentiality_capacity_dec,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_DW_dec :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_DW_enc,
sink => A_task_DW_dec);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_DW_dec,
sink => A_task_sink);
else
multiplexe_security (k).confidentiality_capacity_dec :=
multiplexe_security (k).confidentiality_capacity_dec +
capacity_decrypter +
Key_value;
A_task_DW_dec :=
search_task
(A_sys.tasks,
suppress_space
(To_Unbounded_String
("" &
multiplexe_security (k)
.tsk_confidentiality_dec'
img)));
A_task_DW_dec.capacity :=
multiplexe_security (k).confidentiality_capacity_dec;
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_DW_enc,
sink => A_task_DW_dec);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_DW_dec,
sink => A_task_sink);
end if;
else
-- non attackable intra communications
nb_bell_resolved := nb_bell_resolved + 1;
-- add dependencies
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
end if;
dep_bell_solved := True;
end if;
--
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
if (dep_bell_solved = False) then
-- when solving the problem of integrity, we keep the communication
-- but if there was no confidentiality problem solved, then there is already a link between the 2 tasks via DW
-- and also intra communications not attackable
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
nb_biba_resolved := nb_biba_resolved + 1;
end if;
if
(A_task_source.address_space_name /=
A_task_sink.address_space_name)
then
finish := Index (A_task_source.address_space_name, "r");
i :=
Integer'value
(To_String
(suppress_space
(Unbounded_Slice
(A_task_source.address_space_name,
finish + 1,
Length (A_task_source.address_space_name)))));
k :=
Integer'value
(To_String
(suppress_space
(Unbounded_Slice
(A_task_sink.address_space_name,
finish + 1,
Length (A_task_source.address_space_name)))));
if (multiplexe_security (i).integrity_capacity = 0) then
y := y + 1;
multiplexe_security (i).tsk_integrity := y;
multiplexe_security (i).integrity_capacity :=
capacity_hash;
put_debug
("Hash is added for partition" &
To_String (multiplexe_security (i).addr));
add_task
(my_tasks => A_sys.tasks,
name =>
suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_source.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => multiplexe_security (i).integrity_capacity,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_UP :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_UP);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_UP,
sink => A_task_source);
else
multiplexe_security (i).integrity_capacity :=
multiplexe_security (i).integrity_capacity +
capacity_hash;
A_task_UP :=
search_task
(A_sys.tasks,
suppress_space
(To_Unbounded_String
("" &
multiplexe_security (i).tsk_integrity'img)));
A_task_UP.capacity :=
multiplexe_security (i).integrity_capacity;
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_UP);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_UP,
sink => A_task_source);
end if;
if (multiplexe_security (k).integrity_capacity = 0) then
y := y + 1;
multiplexe_security (k).tsk_integrity := y;
multiplexe_security (k).integrity_capacity :=
capacity_hash;
put_debug
("Hash is added for partition" &
To_String (multiplexe_security (k).addr));
add_task
(my_tasks => A_sys.tasks,
name =>
suppress_space (To_Unbounded_String ("" & y'img)),
cpu_name =>
suppress_space (To_Unbounded_String ("processor1")),
address_space_name => A_task_sink.address_space_name,
core_name => suppress_space (To_Unbounded_String ("")),
task_type => periodic_type,
start_time => 0,
capacity => multiplexe_security (i).integrity_capacity,
period => A_task_sink.deadline,
deadline => A_task_sink.deadline,
jitter => 0,
blocking_time => 0,
priority => Integer'value (A_task_source.priority'img),
criticality => 0,
policy => sched_fifo,
mils_task => downgrader);
A_task_UP :=
search_task
(A_sys.tasks,
suppress_space (To_Unbounded_String ("" & y'img)));
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_sink,
sink => A_task_UP);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_UP,
sink => A_task_sink);
else
multiplexe_security (k).integrity_capacity :=
multiplexe_security (k).integrity_capacity +
capacity_hash;
A_task_UP :=
search_task
(A_sys.tasks,
suppress_space
(To_Unbounded_String
("" &
multiplexe_security (k).tsk_integrity'img)));
A_task_UP.capacity :=
multiplexe_security (k).integrity_capacity;
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_sink,
sink => A_task_UP);
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_UP,
sink => A_task_sink);
end if;
elsif
(A_task_source.address_space_name =
A_task_sink.address_space_name) and
(dep_bell_solved = True)
then
nb_biba_resolved := nb_biba_resolved + 1;
end if;
end if;
elsif (s.chrom_com (j).mode = nosecure) then
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
if
(A_task_sink.mils_confidentiality_level <
A_task_source.mils_confidentiality_level)
then
if
(A_task_source.address_space_name =
A_task_sink.address_space_name)
then
nb_bell_resolved := nb_bell_resolved + 1;
end if;
end if;
if
(A_task_source.mils_integrity_level <
A_task_sink.mils_integrity_level)
then
if
(A_task_source.address_space_name =
A_task_sink.address_space_name)
then
nb_biba_resolved := nb_biba_resolved + 1;
end if;
end if;
else
-- add dependencies between tasks
add_one_task_dependency_precedence
(my_dependencies => A_sys.dependencies,
source => A_task_source,
sink => A_task_sink);
end if;
j := j + 1;
end loop;
end security_configuration4;
end Paes.security_implementation;
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