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# pskc2pskc.py - script to convert a PSKC file to another PSKC file
#
# Copyright (C) 2018 Arthur de Jong
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
"""Script to convert a PSKC file to another PSKC file."""
import argparse
import pskc
from pskc.scripts.util import (
OutputFile, VersionAction, get_key, get_password)
epilog = '''
supported columns:
id, serial, secret, counter, time_offset, time_interval, interval,
time_drift, issuer, manufacturer, response_length, algorithm
And any other properties of pskc.key.Key instances.
Report bugs to <python-pskc-users@lists.arthurdejong.org>.
'''.strip()
# set up command line parser
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description='Convert a PSKC file to another PSKC file.', epilog=epilog)
parser.add_argument(
'input', metavar='FILE', help='the PSKC file to read')
parser.add_argument(
'-V', '--version', action=VersionAction)
parser.add_argument(
'-o', '--output', metavar='FILE',
help='write PSKC to file instead of stdout')
parser.add_argument(
'-p', '--password', '--passwd', metavar='PASS/FILE',
help='password to use for decryption (or read from a file)')
parser.add_argument(
'-s', '--secret', metavar='KEY/FILE',
help='hex encoded encryption key or a file containing the binary key')
parser.add_argument(
'--new-password', '--new-passwd', metavar='PASS/FILE',
help='password to use for encryption (or read from a file)')
parser.add_argument(
'--new-secret', metavar='KEY/FILE',
help='hex encoded encryption key or a file containing the binary key')
def main():
"""Convert a PSKC file to another PSKC file."""
# parse command-line arguments
args = parser.parse_args()
# open and parse input PSKC file
pskcfile = pskc.PSKC(args.input)
if args.secret:
pskcfile.encryption.key = get_key(args.secret)
pskcfile.encryption.remove_encryption()
elif args.password:
pskcfile.encryption.derive_key(get_password(args.password))
pskcfile.encryption.remove_encryption()
# encrypt the output file if needed
if args.new_secret:
assert not pskcfile.encryption.is_encrypted
pskcfile.encryption.setup_preshared_key(key=get_key(args.new_secret))
elif args.new_password:
assert not pskcfile.encryption.is_encrypted
pskcfile.encryption.setup_pbkdf2(get_password(args.new_password))
# write output PSKC file
with OutputFile(args.output) as output:
pskcfile.write(output)
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