/usr/share/ada/adainclude/aws/aws-server-hotplug.adb is in libaws2.10.2-dev 2.10.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 | ------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2000-2009, AdaCore --
-- --
-- This library 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 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. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
------------------------------------------------------------------------------
with Ada.Characters.Handling;
with Ada.Containers.Indefinite_Hashed_Maps;
with Ada.Strings.Hash;
with Ada.Strings.Unbounded;
with Ada.Text_IO;
with Strings_Cutter;
with AWS.Communication;
with AWS.Communication.Server;
with AWS.Digest;
with AWS.Messages;
with AWS.MIME;
with AWS.URL;
package body AWS.Server.Hotplug is
use Ada.Strings.Unbounded;
Authorization_Error : exception;
function Message
(Server : String;
Name : String;
Web_Server : HTTP_Access;
Parameters : Communication.Parameter_Set
:= Communication.Null_Parameter_Set)
return Response.Data;
-- Handle incoming message to register/unregister a module
package Hotplug_Server is
new Communication.Server (HTTP, HTTP_Access, Message);
type Client_Data is record
Password : Unbounded_String;
Host : Unbounded_String;
Port : Positive;
Nonce : Digest.Nonce;
end record;
package Client_Table is new Ada.Containers.Indefinite_Hashed_Maps
(String, Client_Data, Ada.Strings.Hash, "=");
Null_Nonce : constant Digest.Nonce := (others => ' ');
protected Client_Handler is
procedure Add
(Client : String;
Data : Client_Data);
-- Add this client to the list of trusted clients
procedure Get_Nonce
(Client : String;
Nonce : out Digest.Nonce);
-- Returns a new Nonce string
function Get (Client : String) return Client_Data;
-- Returns data for specified client
procedure Delete_All;
-- Removes all client from the handler
private
Clients : Client_Table.Map;
end Client_Handler;
----------------------
-- Activate_Hotplug --
----------------------
procedure Activate
(Web_Server : HTTP_Access;
Port : Positive;
Authorization_File : String;
Register_Mode : AWS.Hotplug.Register_Mode := AWS.Hotplug.Add)
is
use Ada;
use Ada.Characters.Handling;
function "+"
(Str : String)
return Unbounded_String renames To_Unbounded_String;
File : Text_IO.File_Type;
Buffer : String (1 .. 1_024);
Last : Natural;
Line : Strings_Cutter.Cut_String;
N : Natural := 0;
begin
Hotplug_Server.Start (Port, Web_Server);
AWS.Hotplug.Set_Mode (Web_Server.Filters, Register_Mode);
Text_IO.Open (File, Text_IO.In_File, Authorization_File);
while not Text_IO.End_Of_File (File) loop
Text_IO.Get_Line (File, Buffer, Last);
N := N + 1;
Strings_Cutter.Create (Line, Buffer (1 .. Last), Separators => ":");
if Strings_Cutter.Field_Count (Line) /= 4 then
declare
Error_Message : constant String
:= Authorization_File & ": format error in line "
& Natural'Image (N);
begin
Log.Write (Web_Server.Error_Log, Error_Message);
raise Constraint_Error with Error_Message;
end;
end if;
Client_Handler.Add
(Client => Strings_Cutter.Field (Line, 1),
Data =>
(Password => +Strings_Cutter.Field (Line, 2),
Host => +To_Lower (Strings_Cutter.Field (Line, 3)),
Port => Positive'Value (Strings_Cutter.Field (Line, 4)),
Nonce => Null_Nonce));
end loop;
Text_IO.Close (File);
exception
when Text_IO.Name_Error =>
Log.Write
(Web_Server.Error_Log,
"Can't open authorization file " & Authorization_File);
end Activate;
-------------
-- Message --
-------------
function Message
(Server : String;
Name : String;
Web_Server : HTTP_Access;
Parameters : Communication.Parameter_Set
:= Communication.Null_Parameter_Set)
return Response.Data
is
pragma Unreferenced (Server);
use Ada.Characters.Handling;
function Get_Nonce (Client_Name : String) return String;
-- Returns a Nonce string
function Check_Auth
(Client_Name, Digest, Regexp : String;
URL : String := "") return Boolean;
-- Returns True if the Digest string is ok. If URL is specified, checks
-- also that this redirection is authorized.
----------------
-- Check_Auth --
----------------
function Check_Auth
(Client_Name, Digest, Regexp : String;
URL : String := "") return Boolean
is
procedure Log_Error;
-- Log an error message into the server error log file
CD : constant Client_Data := Client_Handler.Get (Client_Name);
D : AWS.Digest.Digest_String;
Result : Boolean;
---------------
-- Log_Error --
---------------
procedure Log_Error is
begin
Log.Write
(Web_Server.Error_Log,
"Wrong authorization "
& Client_Name & '|' & Regexp & '|' & URL);
end Log_Error;
begin
D := AWS.Digest.Create
(Client_Name, "hotplug",
To_String (CD.Password), String (CD.Nonce), "hotplug", Regexp);
if URL = "" then
Result := D = Digest;
return D = Digest;
else
declare
U : AWS.URL.Object;
begin
U := AWS.URL.Parse (URL);
Result := D = Digest
and then To_Lower (AWS.URL.Host (U)) = To_String (CD.Host)
and then AWS.URL.Port (U) = CD.Port;
exception
when AWS.URL.URL_Error =>
Result := False;
end;
end if;
if not Result then
Log_Error;
end if;
return Result;
end Check_Auth;
---------------
-- Get_Nonce --
---------------
function Get_Nonce (Client_Name : String) return String is
Nonce : Digest.Nonce;
begin
Client_Handler.Get_Nonce (Client_Name, Nonce);
return String (Nonce);
end Get_Nonce;
begin
-- There is two kind of message REGISTER and UNREGISTER. The formats
-- are (parameters are between <>):
--
-- REGISTER <name> <digest> <regexp> <URL>
-- UNREGISTER <name> <digest> <regexp>
-- REQUEST_NONCE <name>
if Name = Register_Message and then Parameters'Length = 4 then
if Check_Auth
(Client_Name => To_String (Parameters (1)),
Digest => To_String (Parameters (2)),
Regexp => To_String (Parameters (3)),
URL => To_String (Parameters (4)))
then
-- Now check that the URL host for this client is authorized
AWS.Hotplug.Register
(Web_Server.Filters,
To_String (Parameters (3)),
To_String (Parameters (4)));
return Response.Acknowledge (Messages.S200, "OK");
else
return Response.Acknowledge (Messages.S401, "Wrong authorization");
end if;
elsif Name = Unregister_Message and then Parameters'Length = 3 then
if Check_Auth
(Client_Name => To_String (Parameters (1)),
Digest => To_String (Parameters (2)),
Regexp => To_String (Parameters (3)))
then
AWS.Hotplug.Unregister
(Web_Server.Filters,
To_String (Parameters (3)));
return Response.Acknowledge (Messages.S200, "OK");
else
return Response.Acknowledge (Messages.S401, "Wrong authorization");
end if;
elsif Name = Request_Nonce_Message and then Parameters'Length = 1 then
return Response.Build
(MIME.Text_Plain, Get_Nonce (To_String (Parameters (1))));
else
return Response.Acknowledge (Messages.S400, "Unknown message");
end if;
exception
when AWS.Hotplug.Register_Error =>
-- Exception sent because a duplicate client name has been found
-- on this server.
return Response.Acknowledge (Messages.S409, "Cannot register");
when Authorization_Error =>
return Response.Acknowledge (Messages.S401, "Cannot register");
end Message;
-------------------
-- Nonce_Handler --
-------------------
protected body Client_Handler is
---------
-- Add --
---------
procedure Add
(Client : String;
Data : Client_Data)
is
Cursor : Client_Table.Cursor;
Success : Boolean;
begin
Client_Table.Insert (Clients, Client, Data, Cursor, Success);
if not Success then
raise Authorization_Error;
end if;
end Add;
----------------
-- Delete_All --
----------------
procedure Delete_All is
begin
Client_Table.Clear (Clients);
end Delete_All;
---------
-- Get --
---------
function Get (Client : String) return Client_Data is
Cursor : Client_Table.Cursor;
begin
Cursor := Client_Table.Find (Clients, Client);
if Client_Table.Has_Element (Cursor) then
return Client_Table.Element (Cursor);
else
raise Authorization_Error;
end if;
end Get;
---------------
-- Get_Nonce --
---------------
procedure Get_Nonce
(Client : String;
Nonce : out Digest.Nonce)
is
Cursor : Client_Table.Cursor;
begin
Cursor := Client_Table.Find (Clients, Client);
if Client_Table.Has_Element (Cursor) then
declare
CD : Client_Data := Client_Table.Element (Cursor);
begin
CD.Nonce := Digest.Create_Nonce;
Nonce := CD.Nonce;
Client_Table.Replace_Element (Clients, Cursor, CD);
end;
else
raise Authorization_Error;
end if;
end Get_Nonce;
end Client_Handler;
--------------
-- Shutdown --
--------------
procedure Shutdown is
begin
Hotplug_Server.Shutdown;
Client_Handler.Delete_All;
end Shutdown;
end AWS.Server.Hotplug;
|