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|
-- Topal: GPG/GnuPG and Alpine/Pine integration
-- Copyright (C) 2001--2009 Phillip J. Brooke
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License version 3 as
-- published by the Free Software Foundation.
--
-- 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, see <http://www.gnu.org/licenses/>.
with Ada.Command_Line;
with Ada.Text_IO;
with Externals.Simple;
with Invocation;
with Menus;
with Misc;
with Readline;
with Sending;
package body Remote_Mode is
function Merge_Recipients (Recipients : UBS_Array) return UBS is
Recips : UBS := NullUBS;
begin
for I in Recipients'Range loop
declare
use type UBS;
begin
Recips := Recips & Recipients(I);
if I /= Recipients'Last then
Recips := Recips & ' ';
end if;
end;
end loop;
return Recips;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Merge_Recipients");
raise;
end Merge_Recipients;
procedure Get_Host_And_Topal (Host : in out UBS;
Topal_Command : in out UBS) is
begin
Host := ToUBS(Readline.Get_String("Which host? "));
Topal_Command := ToUBS(Readline.Get_String("Which topal (on remote host)? "));
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Get_Host_And_Topal");
raise;
end Get_Host_And_Topal;
procedure Trigger is
Server_Trigger : constant String := ToStr(Topal_Directory)
& "/server-trigger";
Reply_Trigger : constant String := ToStr(Topal_Directory)
& "/reply-trigger";
use Externals.Simple;
begin
Echo_Out("", Server_Trigger);
Ada.Text_IO.Put_Line("Waiting for Topal server...");
Reply_Trigger_Loop:
loop
exit Reply_Trigger_Loop when Test_F(Reply_Trigger);
delay 0.5;
end loop Reply_Trigger_Loop;
delay 0.1;
Rm_File(Reply_Trigger);
Ada.Text_IO.Put_Line("Topal server finished...");
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Trigger");
raise;
end Trigger;
procedure Send(Tmpfile : in String;
Mime : in Boolean;
Mimefile : in String;
Recipients : in UBS_Array) is
Host : UBS;
Topal_Command : UBS;
-- What names...?
-- FIXME: these should be variable....
R_Tmpfile : constant String := ".topal/server/tmpfile";
R_Resultfile : constant String := ".topal/server/resultfile";
R_Mimefile : constant String := ".topal/server/mimefile";
R_RVfile : constant String := ".topal/server/rvfile";
L_RVfile : constant String := Misc.Temp_File_Name("lrv");
L_Resultfile : constant String := Misc.Temp_File_Name("lrf");
RV : Integer;
Dummy : Integer;
RF : UBS;
Continue : Boolean := True;
use Ada.Text_IO;
use Externals.Simple;
pragma Unreferenced(Dummy);
begin
Get_Host_And_Topal(Host, Topal_Command);
if ToStr(Host)'Length > 0 and ToStr(Topal_Command)'Length > 0 then
-- Copy Tmpfile to host.
Put_Line("Copying " & Tmpfile & " to "
& ToStr(Host) & ":" & R_Tmpfile);
Dummy := System(ToStr(Config.Binary(Scp))
& " " & Tmpfile
& " " & ToStr(Host) & ":" & R_Tmpfile);
if Config.Boolean_Opts(Read_From) then
RF := ToUBS(" --read-from ");
else
RF := NullUBS;
end if;
-- Run ssh with remotesend(mime).
if Mime then
Put_Line("Attempting ssh " & ToStr(Host) & " "
& ToStr(Topal_Command) & " " & ToStr(RF) & " -remotesendmime "
& R_Tmpfile & " "
& R_Resultfile & " "
& R_RVfile & " "
& R_Mimefile & " "
& ToStr(Merge_Recipients(Recipients)));
Dummy := System(ToStr(Config.Binary(Ssh))
& " "
& ToStr(Host) & " "
& ToStr(Topal_Command) & " " & ToStr(RF) & " -remotesendmime "
& R_Tmpfile & " "
& R_Resultfile & " "
& R_RVfile & " "
& R_Mimefile & " "
& ToStr(Merge_Recipients(Recipients)));
else
Put_Line("Attempting ssh " & ToStr(Host) & " "
& ToStr(Topal_Command) & " " & ToStr(RF) & " -remotesend "
& R_Tmpfile & " "
& R_Resultfile & " "
& R_RVfile & " "
& ToStr(Merge_Recipients(Recipients)));
Dummy := System(ToStr(Config.Binary(Ssh))
& " "
& ToStr(Host) & " "
& ToStr(Topal_Command) & " " & ToStr(RF) & " -remotesend "
& R_Tmpfile & " "
& R_Resultfile & " "
& R_RVfile & " "
& ToStr(Merge_Recipients(Recipients)));
end if;
Put_Line("Copying " & ToStr(Host) & ":" & R_RVfile & " to "
& L_RVfile);
Dummy := System(ToStr(Config.Binary(Scp))
& " " & ToStr(Host) & ":" & R_RVfile
& " " & L_RVfile);
RV := Misc.String_To_Integer(Misc.Read_Fold(L_RVfile));
Put_Line("Read remote RV as " & Integer'Image(RV));
if RV = 0 then
Put_Line("Remote topal returned successfully.");
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Success);
-- Copy Tmpfile, resultfile, perhaps mimefile back.
Put_Line("Copying " & ToStr(Host) & ":" & R_Tmpfile & " to "
& Tmpfile);
Dummy := System(ToStr(Config.Binary(Scp))
& " " & ToStr(Host) & ":" & R_Tmpfile
& " " & Tmpfile);
if Mime then
Put_Line("Copying " & ToStr(Host) & ":" & R_Mimefile & " to "
& Mimefile);
Dummy := System(ToStr(Config.Binary(Scp))
& " " & ToStr(Host) & ":" & R_Mimefile
& " " & Mimefile);
end if;
else
Put_Line("Remote topal failed.");
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Failure);
Continue := False;
end if;
Put_Line("Copying " & ToStr(Host) & ":" & R_Resultfile & " to "
& L_Resultfile);
Dummy := System(ToStr(Config.Binary(Scp))
& " " & ToStr(Host) & ":" & R_Resultfile
& " " & L_Resultfile);
-- Append L_Resultfile...
Put(Result_File, ToStr(Misc.Read_Fold(L_Resultfile)));
-- Clean up.
Put_Line("Deleting remote copies of server files...");
Dummy := System(ToStr(Config.Binary(Ssh))
& " "
& ToStr(Host) & " rm "
& R_Tmpfile & " "
& R_Resultfile & " "
& R_Mimefile & " "
& R_RVfile);
-- For some reason, we're getting failures. Perhaps
-- from an scp call? Set explicit success,
-- although check_send can fail out later.
if Continue then
Sending.Check_Send(Tmpfile, False, Mime, Mimefile, "", Recipients);
else
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Failure);
end if;
else
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Failure);
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Send");
raise;
end Send;
procedure Remote_Send(Tmpfile : in String;
Resultfile : in String;
Mime : in Boolean;
Mimefile : in String;
Recipients : in UBS_Array) is
Command_Pipe : constant String := ToStr(Topal_Directory)
& "/server-commands";
RV_File : constant String := ToStr(Invocation.RVfile);
RF : UBS;
RV : Integer;
use Externals.Simple;
begin
-- This procedure is called by ssh.
if Config.Boolean_Opts(Read_From) then
RF := ToUBS("+");
else
RF := NullUBS;
end if;
if Mime then
Echo_Out("remotesendmime" & ToStr(RF) & " " & RV_File & " "
& Tmpfile & " "
& Resultfile & " "
& Mimefile & " "
& ToStr(Merge_Recipients(Recipients)),
Command_Pipe);
else
Echo_Out("remotesend" & ToStr(RF) & " " & RV_File & " "
& Tmpfile & " "
& Resultfile & " "
& ToStr(Merge_Recipients(Recipients)),
Command_Pipe);
end if;
Trigger;
-- Collect the return value.
declare
use Misc;
begin
if Test_F(RV_File) then
RV := String_To_Integer(Read_Fold(RV_File));
else
RV := 1;
end if;
Ada.Text_IO.Put_Line("Read remote RV as " & Integer'Image(RV));
if RV = 0 then
Ada.Text_IO.Put_Line("Remote send setting success");
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Success);
else
Ada.Text_IO.Put_Line("Remote send setting failure");
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Failure);
end if;
end;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Remote_Send");
raise;
end Remote_Send;
procedure Decrypt(Infile : in String;
MIME : in Boolean;
Content_Type : in String := "") is
Host : UBS;
Topal_Command : UBS;
-- What names...?
-- FIXME: these should be variable....
R_Infile : constant String := ".topal/server/infile";
Dummy : Integer;
use Ada.Text_IO;
use Externals.Simple;
pragma Unreferenced(Dummy);
begin
Get_Host_And_Topal(Host, Topal_Command);
if ToStr(Host)'Length > 0 and ToStr(Topal_Command)'Length > 0 then
-- Copy Infile to host.
Put_Line("Copying " & Infile & " to "
& ToStr(Host) & ":" & R_Infile);
Dummy := System(ToStr(Config.Binary(Scp))
& " " & Infile
& " " & ToStr(Host) & ":" & R_Infile);
-- Run ssh with remotesend(mime).
if Mime then
Put_Line("Attempting ssh " & ToStr(Host) & " "
& ToStr(Topal_Command) & " -remotemimedecrypt "
& R_Infile);
Dummy := System(ToStr(Config.Binary(Ssh))
& " "
& ToStr(Host) & " "
& ToStr(Topal_Command) & " -remotemimedecrypt "
& R_Infile
& " "
& Content_Type);
else
Put_Line("Attempting ssh " & ToStr(Host) & " "
& ToStr(Topal_Command) & " -remotedecrypt "
& R_Infile);
Dummy := System(ToStr(Config.Binary(Ssh))
& " "
& ToStr(Host) & " "
& ToStr(Topal_Command) & " -remotedecrypt "
& R_Infile);
end if;
-- Clean up.
Put_Line("Deleting remote copies of server files...");
Dummy := System(ToStr(Config.Binary(Ssh))
& " "
& ToStr(Host) & " rm "
& R_Infile);
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Decrypt");
raise;
end Decrypt;
procedure Remote_Decrypt(Infile : in String;
MIME : in Boolean;
Content_Type : in String := "") is
Command_Pipe : constant String := ToStr(Topal_Directory)
& "/server-commands";
use Externals.Simple;
begin
-- This procedure is called by ssh.
if Mime then
Echo_Out("remotemimedecrypt " & Infile & " " & Content_Type,
Command_Pipe);
else
Echo_Out("remotedecrypt " & Infile,
Command_Pipe);
end if;
Trigger;
Ada.Text_IO.Put_Line("Remote decrypt finished (setting success)");
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Success);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Remote_Decrypt");
raise;
end Remote_Decrypt;
procedure Server is
Topal_Command : constant String := Ada.Command_Line.Command_Name;
Server_Dir : constant String := ToStr(Topal_Directory) & "/server";
Command_Pipe : constant String := ToStr(Topal_Directory)
& "/server-commands";
Server_Trigger : constant String := ToStr(Topal_Directory)
& "/server-trigger";
Reply_Trigger : constant String := ToStr(Topal_Directory)
& "/reply-trigger";
use Ada.Text_IO;
use Externals.Simple;
use Menus;
F : File_Type;
L : UBS;
begin
Put_Line("Running in server mode.");
Put_Line("Will re-dispatch calls to "
& Topal_Command);
-- Make sure that the server directory still exists.
Mkdir_P(Server_Dir);
-- We'll deal with SIGINTs.
Misc.Set_Sigint_Handler;
-- Loop, reading the command-line.
Server_Main_Loop:
loop
-- Triggered by presence of server-trigger file.
Server_Trigger_Loop:
loop
exit Server_Trigger_Loop when Test_F(Server_Trigger);
exit Server_Main_Loop when Misc.Signal_Handlers.Sigint_Pending;
delay 0.5;
end loop Server_Trigger_Loop;
delay 0.1;
Rm_File(Server_Trigger);
-- Open the file to read.
Open(File => F,
Mode => In_File,
Name => Command_Pipe);
-- Is this a blocking read? Let's hope so.
L := Misc.Unbounded_Get_Line(F);
declare
A : constant UBS_Array := Misc.Split_Arguments(L);
Refuse : Boolean := False;
Continue : Boolean := True;
RemoteRV : Integer;
CL : UBS := NullUBS;
Offset : Natural;
RemoteD : Boolean := False;
Tmpfile : UBS;
begin
-- Show the user what we propose to do:
New_Line(3);
Put_Line("Request received: to run `"
& Topal_Command
& "' with arguments `" & ToStr(L) & "'");
-- Six choices:
-- remotesend _RETURNVALUE_ _TMPFILE_ _RESULTFILE_ _RECIPIENTS_
-- remotesendmime _RETURNVALUE_ _TMPFILE_ _RESULTFILE_ _MIMETYPE_ _RECIPIENTS_
-- Then those same two, suffixed `+', e.g., remotesend+. + implies read-from (i.e., config.all_headers, config.read_from)
-- remotedecrypt _INFILE_
-- remotedecryptmime _INFILE_
if A'Length >= 5
and then ToStr(A(A'First)) = "remotesend" then
CL := ToUBS(Topal_Command & " -send");
Offset := 2;
elsif A'Length >= 5
and then ToStr(A(A'First)) = "remotesend+" then
CL := ToUBS(Topal_Command & " --read-from -send");
Offset := 2;
elsif A'Length >= 6
and then ToStr(A(A'First)) = "remotesendmime" then
CL := ToUBS(Topal_Command & " -sendmime");
Offset := 2;
elsif A'Length >= 6
and then ToStr(A(A'First)) = "remotesendmime+" then
CL := ToUBS(Topal_Command & " --read-from -sendmime");
Offset := 2;
elsif A'Length = 2
and then ToStr(A(A'First)) = "remotedecrypt" then
CL := ToUBS(Topal_Command & " -display");
Offset := 1;
RemoteD := True;
elsif A'Length = 3
and then ToStr(A(A'First)) = "remotemimedecrypt" then
CL := ToUBS(Topal_Command & " -mime");
Offset := 1;
else
Put_Line("Bogus!");
Continue := False;
end if;
if Continue then
for I in A'First+Offset..A'Last loop
declare
use type UBS;
begin
CL := CL & ' ';
CL := CL & A(I);
end;
end loop;
end if;
if RemoteD then
-- Generate a temporary file. This is a stand-in for
-- the result file.
Tmpfile := ToUBS(Misc.Temp_File_Name("srdt"));
declare
use type UBS;
begin
CL := CL & ' ';
CL := CL & Tmpfile;
end;
end if;
Put_Line("Will run `" & ToStr(CL) & "'");
if Continue and then YN_Menu("Proceed? ") = Yes then
begin
RemoteRV := System(CL);
Put_Line("RemoteRV=" & Integer'Image(RemoteRV));
if RemoteD then
-- Show the temporary file via the pager.
Pager(ToStr(A(A'First+1)));
end if;
end;
else
Refuse := True;
end if;
if Refuse then
Put_Line("Refused request; you may have to manually interrupt client.");
else
-- 2nd argument had better be the return value....
Echo_Out(Misc.Trim_Leading_Spaces(Integer'Image(RemoteRV)),
ToStr(A(A'First+1)));
end if;
end;
Close(F);
Echo_Out("", Reply_Trigger);
Put_Line("Server finished, client can continue.");
New_Line(2);
end loop Server_Main_Loop;
-- Never ends except by sigint.
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Remote_Mode.Server");
raise;
end Server;
end Remote_Mode;
|
