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-- Topal: GPG/GnuPG and Alpine/Pine integration
-- Copyright (C) 2001--2012 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/>.
separate(Sending)
procedure Clearsign (Tmpfile : in String;
Non_Pine : in Boolean;
Mime : in Boolean;
Mimefile : in String;
Selection : in Send_Modes;
Mime_Selection : in MIME_Modes;
AL : in Attachments.Attachment_List;
Hdrfile : in String;
Recipients : in UBS_Array;
Actual_Send : in Boolean;
New_Headers : out UVV;
AS_Content_Type : in String) is
Out_File : constant String := Temp_File_Name("out");
SFD_File : constant String := Temp_File_Name("sfd");
QP_File : constant String := Temp_File_Name("qp");
TDS_File : constant String := Temp_File_Name("tds");
SMIME_Opaque : YN_Index;
begin
-- Run GPG.
if Mime and then (Mime_Selection = Multipart
or Mime_Selection = SMIME) then
-- We need to do something different with Tmpfile.
-- First, we delete all trailing blank lines.
begin
Prepare_For_Clearsign(Tmpfile,
QP_File,
AS_Content_Type);
-- Call out to attachments in case we have to modify QP_File.
Attachments.Replace_Tmpfile(QP_File, AL);
-- Then we clearsign it.
if Mime_Selection = SMIME then
-- Offer to do this opaquely. Note that there isn't an
-- analogue of this for OpenPGP/MIME.
Ada.Text_IO.New_Line(3);
Ada.Text_IO.Put_Line("Some mail servers mangle clearsigned messages. Instead, you could");
Ada.Text_IO.Put_Line("send this message as an opaque signed message. However, if you send");
Ada.Text_IO.Put_Line("an opaque signed message, the recipient will need an S/MIME capable");
Ada.Text_IO.Put_Line("mail user agent to read it.");
Ada.Text_IO.New_Line;
SMIME_Opaque := YN_Menu("Send this as an opaque message? (Answer ‘n’ to send clearsigned.) ");
if SMIME_Opaque = Yes then
Externals.GPG.GPGSM_Wrap(" --base64 --sign --local-user "
& Value_Nonempty(Config.UBS_Opts(my_key))
& " "
& " --output "
& TDS_File
& " "
& QP_File,
TDS_File,
SFD_File);
else
Externals.GPG.GPGSM_Wrap(" --base64 --detach-sign --local-user "
& Value_Nonempty(Config.UBS_Opts(my_key))
& " "
& " --output "
& TDS_File
& " "
& QP_File,
TDS_File,
SFD_File);
end if;
else
Externals.GPG.GPG_Wrap(" --detach-sign --textmode --armor --local-user "
& Value_Nonempty(Config.UBS_Opts(my_key))
& " "
& UGA_Str(Signing => True)
& " "
& " --output "
& TDS_File
& " "
& QP_File,
TDS_File,
SFD_File);
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Clearsign (GPG MIME/3 block 1)");
raise;
end;
else
begin
Externals.GPG.GPG_Wrap(" --clearsign --textmode --local-user "
& Value_Nonempty(Config.UBS_Opts(my_key))
& " "
& UGA_Str(Signing => True)
& " --output "
& Out_File
& " "
& Tmpfile,
Out_File,
SFD_File);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Clearsign (GPG block)");
raise;
end;
end if;
begin
if not (Mime and then (Mime_Selection = Multipart
or Mime_Selection = SMIME)) then
if Selection = ClearsignPO then
-- Rename the file appropriately.
Mv_F(Out_File, Tmpfile & ".asc");
else
Mv_F(Out_File, Tmpfile);
end if;
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Clearsign (MV block)");
raise;
end;
begin
if Mime then
case Mime_Selection is
when InlinePlain => -- Inline plain text
Echo_Out("Content-Type: text/plain", Mimefile);
New_Headers.Append(ToUBS("Content-Type: text/plain"));
when AppPGP => -- application/pgp
Echo_Out("Content-Type: application/pgp; format=text; x-action=sign",
Mimefile);
New_Headers.Append(ToUBS("Content-Type: application/pgp; format=text; x-action=sign"));
when Multipart => -- RFC2015 multipart
-- This is the _really_ nasty one.
-- At this point, we have QP_File, the quoted-printable, and TDS_File, then detached signature.
declare
Blk2 : constant String := Temp_File_Name("mp2");
MC : constant String := Temp_File_Name("mc");
begin
Externals.Mail.Mimeconstruct_Subpart(Infile => TDS_File,
Outfile => Blk2,
Content_Type => "application/pgp-signature",
Dos2UnixU => False,
Use_Encoding => False,
Attachment_Name => "signature.asc",
Disposition => Externals.Mail.Attachment);
Externals.Mail.Mimeconstruct2(Part1_Filename => QP_File,
Part2_Filename => Blk2,
Output_Filename => MC,
Content_Type => "multipart/signed; protocol=""application/pgp-signature""; micalg="""
& Externals.GPG.Micalg_From_Filename(TDS_File)
& """",
Prolog => "This is an OpenPGP/MIME signed message (RFC2440, RFC3156).");
-- Now we need to split these up.
Mail.Extract_Content_Type_From_Header(MC, Mimefile);
New_Headers.Append(Read_Fold(Mimefile));
Mail.Extract_Body(MC, Tmpfile);
end;
when MultipartEncap =>
Error("Menu should not have allowed MultipartEncap here");
when SMIME =>
if SMIME_Opaque = Yes then
declare
MM : constant String := Temp_File_Name("mm");
MM2 : constant String := Temp_File_Name("mm2");
begin
-- Write an opaque signed message.
-- We've got TDS file which is just a base64 blob.
if Actual_Send then
New_Headers.Append(ToUBS("Content-Type: application/pkcs7-mime; smime-type=signed-data; name=""smime.p7s"""));
New_Headers.Append(ToUBS("Content-Transfer-Encoding: base64"));
New_Headers.Append(ToUBS("Content-Disposition: attachment; filename=""smime.p7s"""));
New_Headers.Append(ToUBS("Content-Description: S/MIME cryptographically signed message"));
Externals.Simple.Mv_F(TDS_File, Tmpfile);
else
Echo_Out("Content-Type: application/pkcs7-mime; smime-type=signed-data; name=""smime.p7s""",
MM);
Echo_Append("Content-Transfer-Encoding: base64",
MM);
Echo_Append("Content-Disposition: attachment; filename=""smime.p7s""",
MM);
Echo_Append("Content-Description: S/MIME cryptographically signed message",
MM);
Echo_Append("", MM);
Cat_Append(TDS_File, MM);
Mail.Mimeconstruct_Mixed(UBS_Array'(1 => ToUBS(MM)),
MM2);
Mail.Extract_Content_Type_From_Header(MM2, Mimefile);
New_Headers.Append(Read_Fold(Mimefile));
Mail.Extract_Body(MM2, Tmpfile);
end if;
end;
else
-- Similar to RFC2015 multipart.
-- At this point, we have QP_File, the quoted-printable, and TDS_File, then detached signature.
declare
Blk2 : constant String := Temp_File_Name("mp2");
MC : constant String := Temp_File_Name("mc");
begin
Echo_Out("Content-Type: application/pkcs7-signature; name=""smime.p7s""",
Blk2);
Echo_Append("Content-Transfer-Encoding: base64",
Blk2);
Echo_Append("Content-Disposition: attachment; filename=""smime.p7s""",
Blk2);
Echo_Append("Content-Description: S/MIME Cryptographic Signature",
Blk2);
Echo_Append("", Blk2);
Cat_Append(TDS_File, Blk2);
Externals.Mail.Mimeconstruct2(Part1_Filename => QP_File,
Part2_Filename => Blk2,
Output_Filename => MC,
Content_Type => "multipart/signed; protocol=""application/pkcs7-signature""; micalg="""
& Externals.GPG.Micalg_From_Status(SFD_File)
& """",
Prolog => "This is an S/MIME clearsigned message.");
-- Now we need to split these up.
Mail.Extract_Content_Type_From_Header(MC, Mimefile);
New_Headers.Append(Read_Fold(Mimefile));
Mail.Extract_Body(MC, Tmpfile);
end;
end if;
end case;
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Clearsign (MIME block 2)");
raise;
end;
if not Actual_Send then
Check_Send(Tmpfile, Non_Pine, Mime, Mimefile, Hdrfile, Recipients);
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Clearsign");
raise;
end Clearsign;
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