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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/>.
"""Miscellaneous PGP utilities."""
from pgpy import PGPKey
from public import public
@public
def verifies(verifications):
"""
:param verifications:
:type verifications: Sequence[pgpy.types.SignatureVerification]
:return: bool
"""
return all(bool(verification) and
all(not sigsubj.signature.is_expired
for sigsubj in verification.good_signatures) for
verification in verifications)
@public
def hashes(verifications):
"""
:param verifications:
:return:
:rtype: Generator[str]
"""
for verification in verifications:
for sigsubj in verification.good_signatures:
data = sigsubj.signature.hashdata(sigsubj.subject)
hasher = sigsubj.signature.hash_algorithm.hasher
hasher.update(data)
yield hasher.digest()
@public
def key_from_blob(blob):
"""
:param blob:
:return:
"""
keys = PGPKey.from_blob(blob)
if isinstance(keys, tuple):
return keys[0]
else:
return keys
@public
def key_from_file(file):
"""
:param file:
:return:
"""
keys = PGPKey.from_file(file)
if isinstance(keys, tuple):
return keys[0]
else:
return keys
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