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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/>.
""""""
import pathlib
from mailman.utilities.string import expand
from pgpy.constants import EllipticCurveOID, PubKeyAlgorithm
from mailman_pgp.config import mm_config
def expandable_str(value):
return expand(value, None, mm_config.paths)
def expandable_path(value):
return pathlib.Path(expandable_str(value))
def key_spec(value):
KEYPAIR_TYPE_MAP = {
'RSA': PubKeyAlgorithm.RSAEncryptOrSign,
'DSA': PubKeyAlgorithm.DSA,
'ECDSA': PubKeyAlgorithm.ECDSA,
'ECDH': PubKeyAlgorithm.ECDH
}
ECC_OID_MAP = {
'nistp256': EllipticCurveOID.NIST_P256,
'nistp384': EllipticCurveOID.NIST_P384,
'nistp521': EllipticCurveOID.NIST_P521,
'brainpoolP256r1': EllipticCurveOID.Brainpool_P256,
'brainpoolP384r1': EllipticCurveOID.Brainpool_P384,
'brainpoolP512r1': EllipticCurveOID.Brainpool_P512,
'secp256k1': EllipticCurveOID.SECP256K1
}
key_type, key_length = value.split(':')
key_type = key_type.upper()
key_length = key_length.lower()
if key_type not in KEYPAIR_TYPE_MAP:
raise ValueError('Invalid key type: {}.'.format(key_type))
out_type = KEYPAIR_TYPE_MAP[key_type]
if key_type in ('ECDSA', 'ECDH'):
if key_length not in ECC_OID_MAP:
raise ValueError('Invalid key length: {}.'.format(key_length))
out_length = ECC_OID_MAP[key_length]
else:
out_length = int(key_length)
return (out_type, out_length)
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