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335 | ------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2014-2015, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
------------------------------------------------------------------------------
-- Priority string test
pragma Ada_2012;
with Ada.Command_Line;
with Ada.Exceptions;
with Ada.Streams;
with Ada.Strings.Fixed;
with Ada.Strings.Unbounded;
with Ada.Text_IO;
with AWS.Net.Buffered;
with AWS.Net.Log;
with AWS.Net.SSL;
with AWS.Utils;
with GNAT.Traceback.Symbolic;
procedure Priorities is
use Ada.Text_IO;
use AWS;
use all type Ada.Strings.Unbounded.Unbounded_String;
package ASU renames Ada.Strings.Unbounded;
package ASF renames Ada.Strings.Fixed;
Server : Net.Socket_Type'Class := Net.Socket (False);
Client : Net.SSL.Socket_Type;
Sample : constant Ada.Streams.Stream_Element_Array (1 .. 100) :=
(others => 1);
Latest : constant Ada.Streams.Stream_Element_Array (Sample'Range) :=
(others => 2);
Config : Net.SSL.Config;
GNUTLS : constant Boolean := Utils.Match (Net.SSL.Version, "GNUTLS");
Verbose : Boolean := False with Atomic;
Counter : Natural := 0;
Previous_Chipher : ASU.Unbounded_String;
Ciphers : ASU.Unbounded_String :=
To_Unbounded_String
(if GNUTLS then "NORMAL"
else "DEFAULT"
& ":+TLS13-TLS_AES_128_GCM_SHA256"
& ":+TLS13-TLS_AES_256_GCM_SHA384"
& ":+TLS13-TLS_CHACHA20_POLY1305_SHA256"
& ":+TLS13-TLS_AES_128_CCM_SHA256"
& ":TLS13-TLS_AES_128_CCM_8_SHA256");
task Server_Task is
entry Start;
end Server_Task;
function Is_Handshake_Error (Text : String) return Boolean;
procedure Print (Text : String);
-- Prints only in Verbose mode
procedure Send_Stop_To_Server;
-- Send the last message to server side. Server will stop accepting
-- connections after that and terminate server task.
-----------
-- Error --
-----------
procedure Error (Socket : Net.Socket_Type'Class; Message : String) is
use GNAT.Traceback;
Trace : Tracebacks_Array (1 .. 64);
Last : Natural;
begin
if Is_Handshake_Error (Message) then
Put_Line ("Handshake error");
Net.Log.Stop;
return;
end if;
Call_Chain (Trace, Last);
Put_Line
("# Network error: "
& Message & Symbolic.Symbolic_Traceback (Trace (1 .. Last)));
end Error;
------------------------
-- Is_Handshake_Error --
------------------------
function Is_Handshake_Error (Text : String) return Boolean is
begin
return Text in "No or insufficient priorities were set."
| "error:1408A0C1:lib(20):func(138):reason(193)"
| "No supported cipher suites have been found."
| "error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher"
| "error:1417A0C1:SSL routines:tls_post_process_client_hello:no shared"
& " cipher"
| "14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake"
& " failure"
| "14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake"
& " failure"
| "14004410:SSL routines:CONNECT_CR_SRVR_HELLO:sslv3 alert handshake"
& " failure";
end Is_Handshake_Error;
-----------
-- Print --
-----------
procedure Print (Text : String) is
begin
if Verbose then
Put_Line (Text);
end if;
end Print;
-----------------
-- Server_Task --
-----------------
task body Server_Task is
Peer : Net.SSL.Socket_Type;
Cfg : Net.SSL.Config;
begin
Put_Line ("Server task start.");
Server.Bind
(Family => (if Net.IPv6_Available then Net.Family_Inet6
else Net.Family_Inet),
Port => 0);
Server.Listen;
Server.Set_Timeout (2.0);
Peer.Set_Timeout (1.0);
Net.SSL.Initialize
(Cfg,
Certificate_Filename => "aws-server.crt",
Key_Filename => "aws-server.key",
Exchange_Certificate => True,
Priorities => To_String (Ciphers),
Trusted_CA_Filename => "private-ca.crt");
accept Start;
loop
Peer.Set_Config (Cfg);
Peer.Set_Timeout (1.0);
Server.Accept_Socket (Net.Socket_Type'Class (Peer));
Print (Peer.Cipher_Description);
declare
use Ada.Streams;
Buffer : Stream_Element_Array (Sample'Range);
begin
Net.Buffered.Read (Peer, Buffer);
Peer.Shutdown;
exit when Buffer = Latest;
if Buffer /= Sample then
Put_Line ("Data distortion.");
end if;
end;
end loop;
Server.Shutdown;
Net.SSL.Release (Cfg);
Put_Line ("Server task done.");
exception
when E : others =>
Put_Line ("Server task " & Ada.Exceptions.Exception_Information (E));
end Server_Task;
Host : constant String := Net.Localhost (Net.IPv6_Available);
Port : Natural := 0;
-------------------------
-- Send_Stop_To_Server --
-------------------------
procedure Send_Stop_To_Server is
begin
Net.SSL.Initialize
(Config => Config,
Certificate_Filename => "aws-client.pem",
Trusted_CA_Filename => "private-ca.crt");
Client.Set_Config (Config);
Client.Connect (Host, Port);
Client.Send (Latest);
Client.Shutdown;
Net.SSL.Release (Config);
end Send_Stop_To_Server;
function Replace_Underscore (S : String) return String is
begin
return R : String (S'Range) do
for J in S'Range loop
R (J) := (if S (J) = '_' then '-' else S (J));
end loop;
end return;
end Replace_Underscore;
begin
Net.Log.Start (Error => Error'Unrestricted_Access, Write => null);
if Ada.Command_Line.Argument_Count > 0 then
Verbose := True;
Net.SSL.Set_Debug (Integer'Value (Ada.Command_Line.Argument (1)));
end if;
Print (Net.SSL.Version);
Server_Task.Start;
Port := Server.Get_Port;
loop
begin
Net.SSL.Initialize
(Config => Config,
Priorities => To_String (Ciphers),
Certificate_Filename => "aws-client.pem",
Trusted_CA_Filename => "private-ca.crt");
exception
when E : Net.Socket_Error =>
if Is_Handshake_Error (Ada.Exceptions.Exception_Message (E)) then
Send_Stop_To_Server;
exit;
end if;
raise;
end;
Client.Set_Config (Config);
Client.Set_Timeout (1.0);
begin
Client.Connect (Host, Port);
Client.Send (Sample);
exception
when E : Net.Socket_Error =>
Client.Shutdown;
Net.SSL.Release (Config);
if Is_Handshake_Error (Ada.Exceptions.Exception_Message (E)) then
Send_Stop_To_Server;
exit;
elsif Ada.Exceptions.Exception_Message (E)
= "The TLS connection was non-properly terminated."
and then ASU.Index (Previous_Chipher, "TLS1.3") > 0
then
-- GNUTLS method to disable TLS 1.3
Print ("Disable TLS-1.3; " & To_String (Ciphers));
Ciphers := To_Unbounded_String ("NORMAL:-VERS-TLS1.3");
else
raise;
end if;
end;
Counter := Counter + 1;
if Client.Get_FD /= Net.No_Socket then
Append
(Ciphers,
":-"
& (if ASF.Index (Client.Cipher_Description, "TLSv1.3") > 0
then "TLS13-" else "")
& Utils.Head_Before (Client.Cipher_Description, " "));
if To_String (Previous_Chipher) = Client.Cipher_Description then
Put_Line ("The same cipher " & To_String (Previous_Chipher));
exit;
else
Previous_Chipher := To_Unbounded_String (Client.Cipher_Description);
end if;
Client.Shutdown;
end if;
Net.SSL.Release (Config);
end loop;
Print
("Total disabled chipers" & Counter'Img & ASCII.LF & To_String (Ciphers));
if Counter < 4 then
Put_Line ("Too few iterations" & Counter'Img);
end if;
exception
when E : others =>
Put_Line
("Main task " & Ada.Exceptions.Exception_Information (E) & ASCII.LF
& To_String (Ciphers));
end Priorities;
|