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# Copyright (C) 2017 Jan Jancar
#
# This file is a part of the Mailman PGP plugin.
#
# 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 <http://www.gnu.org/licenses/>.
"""Model for PGP enabled mailing lists."""
from os.path import exists, isfile, join
from mailman.database.types import Enum, SAUnicode
from mailman.interfaces.action import Action
from mailman.interfaces.listmanager import IListManager
from pgpy import PGPKey
from public import public
from sqlalchemy import Boolean, Column, Integer
from sqlalchemy.orm import reconstructor
from zope.component import getUtility
from mailman_pgp.config import config
from mailman_pgp.model.base import Base
from mailman_pgp.pgp.keygen import ListKeyGenerator
@public
class PGPMailingList(Base):
"""A PGP enabled mailing list."""
__tablename__ = 'pgp_lists'
id = Column(Integer, primary_key=True)
list_id = Column(SAUnicode, index=True)
# Signature related properties
unsigned_msg_action = Column(Enum(Action))
inline_pgp_action = Column(Enum(Action))
expired_sig_action = Column(Enum(Action))
revoked_sig_action = Column(Enum(Action))
# duplicate_sig_action = Column(Enum(Action))
invalid_sig_action = Column(Enum(Action))
strip_original_sig = Column(Boolean)
sign_outgoing = Column(Boolean)
# Encryption related properties
nonencrypted_msg_action = Column(Enum(Action))
def __init__(self, mlist):
super().__init__()
self.list_id = mlist.list_id
self._init()
self._mlist = mlist
self._generate(mlist)
@reconstructor
def _init(self):
self._mlist = None
self._key = None
self._key_generator = None
def _generate(self, mlist):
self._key_generator = ListKeyGenerator(config.pgp.keypair_config,
mlist.display_name,
mlist.posting_address,
mlist.request_address,
self.key_path)
self._key_generator.start()
@property
def mlist(self):
"""
:return:
:rtype: mailman.model.mailinglist.MailingList
"""
if self._mlist is None:
self._mlist = getUtility(IListManager).get_by_list_id(self.list_id)
return self._mlist
@property
def key(self):
"""
:return:
:rtype: pgpy.PGPKey
"""
if self._key is None:
# Check the file
if exists(self.key_path) and isfile(self.key_path):
self._key, _ = PGPKey.from_file(self.key_path)
else:
# Check if key generator is running or what? Restart it if not.
# If we race it shutting down and saving the key file
# it will simply check the key_file exists and exit.
if self._key_generator is None or \
not self._key_generator.is_alive():
self._generate(self.mlist)
return self._key
@property
def pubkey(self):
"""
:return:
:rtype: pgpy.PGPKey
"""
if self.key is None:
return None
return self.key.pubkey
@property
def key_path(self):
"""
:return:
:rtype: str
"""
return join(config.pgp.keydir_config['list_keydir'],
self.list_id + '.asc')
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