From 01914e99d2c6dfffe01c5f3c6cc5c3fdf145187e Mon Sep 17 00:00:00 2001 From: Vincent Le Gallic Date: Sun, 26 Jan 2014 01:24:07 +0100 Subject: [PATCH] Pour transformer un mail en pgp/mime en un PGP SIGNED MESSAGE --- clearmime.py | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100755 clearmime.py diff --git a/clearmime.py b/clearmime.py new file mode 100755 index 0000000..d53c7d5 --- /dev/null +++ b/clearmime.py @@ -0,0 +1,69 @@ +#!/usr/bin/python + +# Copyright 2008 Lenny Domnitser +# +# This program 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 3 of the License, or (at +# your option) any later version. +# +# 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 . + +__all__ = 'clarify', +__author__ = 'Lenny Domnitser' +__version__ = '0.1' + +import email +import re + +TEMPLATE = '''-----BEGIN PGP SIGNED MESSAGE----- +Hash: %(hashname)s +NotDashEscaped: You need GnuPG to verify this message + +%(text)s%(sig)s''' + + +def _clarify(message, messagetext): + if message.get_content_type() == 'multipart/signed': + if message.get_param('protocol') == 'application/pgp-signature': + hashname = message.get_param('micalg').upper() + assert hashname.startswith('PGP-') + hashname = hashname.replace('PGP-', '', 1) + textmess, sigmess = message.get_payload() + assert sigmess.get_content_type() == 'application/pgp-signature' + #text = textmess.as_string() - not byte-for-byte accurate + text = messagetext.split('\n--%s\n' % message.get_boundary(), 2)[1] + sig = sigmess.get_payload() + assert isinstance(sig, str) + # Setting content-type to application/octet instead of text/plain + # to maintain CRLF endings. Using replace_header instead of + # set_type because replace_header clears parameters. + message.replace_header('Content-Type', 'application/octet') + clearsign = TEMPLATE % locals() + clearsign = clearsign.replace( + '\r\n', '\n').replace('\r', '\n').replace('\n', '\r\n') + message.set_payload(clearsign) + elif message.is_multipart(): + for message in message.get_payload(): + _clarify(message, messagetext) + + +def clarify(messagetext): + '''given a string containing a MIME message, returns a string + where PGP/MIME messages are replaced with clearsigned messages.''' + + message = email.message_from_string(messagetext) + _clarify(message, messagetext) + return message.as_string() + + +if __name__ == '__main__': + import sys + sys.stdout.write(clarify(sys.stdin.read())) + -- 2.39.2