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-- Topal: GPG/GnuPG and Alpine/Pine integration
-- Copyright (C) 2001--2024 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 Sign_Encrypt (Tmpfile : in String;
Non_Pine : in Boolean;
Mime : in Boolean;
Mimefile : in String;
Send_Keys : in Keys.Key_List;
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");
SFD2_File : constant String := Temp_File_Name("sfd2");
QP_File : constant String := Temp_File_Name("qp");
TDS_File : constant String := Temp_File_Name("tds");
begin
-- Run GPG.
if Mime and then (Mime_Selection = MultipartEncap
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
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.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.Sign_Encrypt (GPG MIME/4 block)");
raise;
end;
else
if Mime and then Mime_Selection = Multipart 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 rename QP_File to Tmpfile...
Mv_F(QP_File, Tmpfile);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Sign_Encrypt (Pre-GPG MIME/3 block)");
raise;
end;
end if;
begin
Externals.GPG.GPG_Wrap(" --encrypt --sign --textmode --armor --local-user "
& Value_Nonempty(Config.UBS_Opts(my_key))
& " "
& UGA_Str(Signing => True)
& " --output "
& Out_File
& " "
& Keys.Processed_Recipient_List(Send_Keys)
& " "
& Tmpfile,
Out_File,
SFD_File);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Sign_Encrypt (GPG block)");
raise;
end;
end if;
begin
if not (Mime and then (Mime_Selection = MultipartEncap
or Mime_Selection = SMIME)) then
if Selection = SignEncryptPO 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.Sign_Encrypt (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=encrypt",
Mimefile);
New_Headers.Append(ToUBS("Content-Type: application/pgp; format=text; x-action=encrypt"));
when Multipart => -- RFC2015 multipart
-- This is the nasty one.
-- We are using the combined method allowed in section 6.2.
declare
Blk1 : constant String := Temp_File_Name("mp1");
Blk2 : constant String := Temp_File_Name("mp2");
MC : constant String := Temp_File_Name("mc");
begin
-- We first create the two blocks.
-- The first block is easy:
Echo_Out("Content-Type: application/pgp-encrypted",
Blk1);
Echo_Append("", Blk1);
Echo_Append("Version: 1", Blk1);
-- The second block starts with a
-- content-type, then is the tmpfile we've
-- put together.
Echo_Out("Content-Type: application/octet-stream",
Blk2);
Echo_Append("Content-Disposition: attachment; filename=""message.asc""", Blk2);
Echo_Append("", Blk2);
Cat_Append(Tmpfile, Blk2);
-- Now we put them together.
Externals.Mail.Mimeconstruct2(Part1_Filename => Blk1,
Part2_Filename => Blk2,
Output_Filename => MC,
Content_Type => "multipart/encrypted; protocol=""application/pgp-encrypted""",
Prolog => "This is an OpenPGP/MIME encrypted 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 => -- RFC2015 multipart encapsulated
-- This is the REALLY nasty one. We are
-- encapsulating, so we have to sign then
-- encrypt.
declare
Blk1 : constant String := Temp_File_Name("mp1");
Blk2 : constant String := Temp_File_Name("mp2");
MCS : constant String := Temp_File_Name("mcs");
MC : constant String := Temp_File_Name("mc");
begin
-- We first create the two blocks.
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 => MCS,
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 the encrypt bit....
Rm_File(Tmpfile);
Externals.GPG.GPG_Wrap(" --encrypt --armor "
& " "
& " --output "
& Tmpfile
& " "
& Keys.Processed_Recipient_List(Send_Keys)
& " "
& MCS,
Tmpfile,
SFD_File);
-- The first block is easy:
Echo_Out("Content-Type: application/pgp-encrypted",
Blk1);
Echo_Append("", Blk1);
Echo_Append("Version: 1", Blk1);
-- The second block starts with a
-- content-type, then is the tmpfile we've
-- put together.
Echo_Out("Content-Type: application/octet-stream",
Blk2);
Echo_Append("Content-Disposition: attachment; filename=""message.asc""", Blk2);
Echo_Append("", Blk2);
Cat_Append(Tmpfile, Blk2);
-- Now we put them together.
Externals.Mail.Mimeconstruct2(Part1_Filename => Blk1,
Part2_Filename => Blk2,
Output_Filename => MC,
Content_Type => "multipart/encrypted; protocol=""application/pgp-encrypted""",
Prolog => "This is an OpenPGP/MIME encrypted 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 SMIME =>
-- Similar to RFC2015 multipart encapsulated.
declare
Blk2 : constant String := Temp_File_Name("mp2");
MM1 : constant String := Temp_File_Name("mm1");
MM2 : constant String := Temp_File_Name("mm2");
MM3 : constant String := Temp_File_Name("mm3");
begin
-- We first create the two blocks.
Echo_Out("Content-Type: application/pkcs7-mime; smime-type=signed-data; 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);
-- Now the encrypt bit....
Rm_File(Tmpfile);
Externals.GPG.GPGSM_Wrap_Encrypt(MM1,
SFD2_File,
Blk2,
Send_Keys);
if Actual_Send then
New_Headers.Append(ToUBS("Content-Type: application/pkcs7-mime; smime-type=enveloped-data; name=""smime.p7m"""));
New_Headers.Append(ToUBS("Content-Transfer-Encoding: base64"));
New_Headers.Append(ToUBS("Content-Disposition: attachment; filename=""smime.p7m"""));
Externals.Simple.Mv_F(MM1, Tmpfile);
else
-- Then concatenate it all together.
-- Same workaround as in sending-encrypt.adb.
Echo_Out("Content-Type: application/pkcs7-mime; smime-type=enveloped-data; name=""smime.p7m""",
MM2);
Echo_Append("Content-Transfer-Encoding: base64",
MM2);
Echo_Append("Content-Disposition: attachment; filename=""smime.p7m""",
MM2);
Echo_Append("", MM2);
Cat_Append(MM1, MM2);
Mail.Mimeconstruct_Mixed(UBS_Array'(1 => ToUBS(MM2)),
MM3);
Mail.Extract_Content_Type_From_Header(MM3, Mimefile);
New_Headers.Append(Read_Fold(Mimefile));
Mail.Extract_Body(MM3,Tmpfile);
end if;
end;
end case;
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Sending.Sign_Encrypt (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.Sign_Encrypt");
raise;
end Sign_Encrypt;
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