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# pskc2csv.py - script to convert a PSKC file to CSV
#
# Copyright (C) 2014-2018 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 CSV."""
import argparse
import base64
import csv
import getpass
import operator
import sys
from binascii import b2a_hex
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 CSV.', 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 CSV to file instead of stdout')
parser.add_argument(
'-c', '--columns', metavar='COL:LABEL,COL,..',
type=lambda x: [column.split(':', 1) for column in x.split(',')],
help='list of columns with optional labels to export',
default='serial,secret,algorithm,response_length,time_interval')
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 file containing the binary key')
encodings = {
'hex': b2a_hex,
'base32': base64.b32encode,
'base64': base64.b64encode,
}
parser.add_argument(
'-e', '--secret-encoding', choices=sorted(encodings.keys()),
help='encoding used for outputting key material',
default='hex')
def get_column(key, column, encoding):
"""Return a string value for the given column."""
value = operator.attrgetter(column)(key)
if column == 'secret':
# Python 3 compatible construct for outputting a string
return str(encodings[encoding](value).decode())
return value
def main():
"""Convert a PSKC file to CSV."""
# 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)
elif args.password:
pskcfile.encryption.derive_key(get_password(args.password))
elif sys.stdin.isatty() and pskcfile.encryption.is_encrypted:
# prompt for a password
prompt = 'Password: '
if pskcfile.encryption.key_name:
prompt = '%s: ' % pskcfile.encryption.key_name
passwd = getpass.getpass(prompt)
pskcfile.encryption.derive_key(passwd)
# open output CSV file, write header and keys
with OutputFile(args.output) as output:
csvfile = csv.writer(output, quoting=csv.QUOTE_MINIMAL)
csvfile.writerow([column[-1] for column in args.columns])
for key in pskcfile.keys:
csvfile.writerow([
get_column(key, column[0], args.secret_encoding)
for column in args.columns])
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