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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/>.
"""Strict inline PGP message wrapper."""
from email.message import Message
from pgpy import PGPKey, PGPMessage, PGPSignature
from pgpy.types import Armorable
class InlineWrapper:
def __init__(self, msg: Message):
self.msg = msg
def _is_inline(self):
return not self.msg.is_multipart()
def _as_string(self):
return str(self.msg.get_payload())
def _has_armor(self, block_type):
try:
dearm = Armorable.ascii_unarmor(self._as_string())
if dearm['magic'] == block_type:
return True
except:
pass
return False
def is_signed(self):
"""
:return:
"""
return self._is_inline() and self._has_armor('SIGNATURE')
def is_encrypted(self):
"""
:return:
"""
return self._is_inline() and self._has_armor('MESSAGE')
def verify(self, key: PGPKey):
"""
:param key:
:return:
"""
message = PGPMessage.from_blob(self._as_string())
return key.verify(message)
def decrypt(self, key: PGPKey):
"""
:param key:
:return:
"""
message = PGPMessage.from_blob(self._as_string())
return key.decrypt(message)
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