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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2013 Emanuele Aina <em@nerd.ocracy.org>. All Rights Reserved.
# Copyright (C) 2011 Toni Corvera. All Rights Reserved.
# This file is licensed under the BSD 2-clause license:
# http://www.opensource.org/licenses/BSD-2-Clause
#
# Import script for the Revelation password manager:
# http://revelation.olasagasti.info/
# Heavily based on the Relevation command line tool:
# http://p.outlyer.net/relevation/
import os, sys, argparse, zlib, getpass, traceback
from subprocess import Popen, PIPE, STDOUT, CalledProcessError
from collections import OrderedDict
try:
from lxml import etree
except ImportError:
from xml.etree import ElementTree as etree
USE_PYCRYPTO = True
try:
from Crypto.Cipher import AES
except ImportError:
USE_PYCRYPTO = False
try:
from crypto.cipher import rijndael, cbc
from crypto.cipher.base import noPadding
except ImportError:
sys.stderr.write('Either PyCrypto or cryptopy are required\n')
raise
def path_for(element, path=None):
""" Generate path name from elements name and current path """
name = element.find('name').text
name = name.replace('/', '-').replace('\\', '-')
path = path if path else ''
return os.path.join(path, name)
def format_password_data(data):
""" Format the secret data that will be handed to Pass in multi-line mode:
$password
$fieldname: $fielddata
...
$multi_line_notes_with_leading_spaces"""
password = data.pop('password', None) or ''
ret = password + '\n'
notes = data.pop('notes', None)
for label, text in data.iteritems():
ret += label + ': ' + text + '\n'
if notes:
ret += ' ' + notes.replace('\n', '\n ').strip() + '\n'
return ret
def password_data(element):
""" Return password data and additional info if available from
password entry element. """
data = OrderedDict()
data['password'] = element.find('field[@id="generic-password"]').text
data['type'] = element.attrib['type']
for field in element.findall('field'):
field_id = field.attrib['id']
if field_id == 'generic-password':
continue
if field.text is not None:
data[field_id] = field.text
for tag in ('description', 'notes'):
field = element.find(tag)
if field is not None and field.text:
data[tag] = field.text
return format_password_data(data)
def import_entry(element, path=None, verbose=0):
""" Import new password entry to password-store using pass insert
command """
cmd = ['pass', 'insert', '--multiline', '--force', path_for(element, path)]
if verbose:
print 'cmd:\n ' + ' '.join(cmd)
proc = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=STDOUT)
stdin = password_data(element).encode('utf8')
if verbose:
print 'input:\n ' + stdin.replace('\n', '\n ').strip()
stdout, _ = proc.communicate(stdin)
retcode = proc.poll()
if retcode:
raise CalledProcessError(retcode, cmd, output=stdout)
def import_folder(element, path=None, verbose=0):
path = path_for(element, path)
import_subentries(element, path, verbose)
def import_subentries(element, path=None, verbose=0):
""" Import all sub entries of the current folder element """
for entry in element.findall('entry'):
if entry.attrib['type'] == 'folder':
import_folder(entry, path, verbose)
else:
import_entry(entry, path, verbose)
def decrypt_gz(key, cipher_text):
''' Decrypt cipher_text using key.
decrypt(str, str) -> cleartext (gzipped xml)
This function will use the underlying, available, cipher module.
'''
if USE_PYCRYPTO:
# Extract IV
c = AES.new(key)
iv = c.decrypt(cipher_text[12:28])
# Decrypt data, CBC mode
c = AES.new(key, AES.MODE_CBC, iv)
ct = c.decrypt(cipher_text[28:])
else:
# Extract IV
c = rijndael.Rijndael(key, keySize=len(key), padding=noPadding())
iv = c.decrypt(cipher_text[12:28])
# Decrypt data, CBC mode
bc = rijndael.Rijndael(key, keySize=len(key), padding=noPadding())
c = cbc.CBC(bc, padding=noPadding())
ct = c.decrypt(cipher_text[28:], iv=iv)
return ct
def main(datafile, verbose=False, xml=False):
f = None
with open(datafile, "rb") as f:
# Encrypted data
data = f.read()
if xml:
xmldata = data
else:
password = getpass.getpass()
# Pad password
password += (chr(0) * (32 - len(password)))
# Decrypt. Decrypted data is compressed
cleardata_gz = decrypt_gz(password, data)
# Length of data padding
padlen = ord(cleardata_gz[-1])
# Decompress actual data (15 is wbits [ref3] DON'T CHANGE, 2**15 is the (initial) buf size)
xmldata = zlib.decompress(cleardata_gz[:-padlen], 15, 2**15)
root = etree.fromstring(xmldata)
import_subentries(root, verbose=verbose)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-x', '--xml', help='read plain XML file', action='store_true')
parser.add_argument('--verbose', '-v', action='count')
parser.add_argument('FILE', help="the file storing the Revelation passwords")
args = parser.parse_args()
def err(s):
sys.stderr.write(s+'\n')
try:
main(args.FILE, verbose=args.verbose, xml=args.xml)
except KeyboardInterrupt:
if args.verbose:
traceback.print_exc()
err(str(e))
except zlib.error:
err('Failed to decompress decrypted data. Wrong password?')
sys.exit(os.EX_DATAERR)
except CalledProcessError as e:
if args.verbose:
traceback.print_exc()
print 'output:\n ' + e.output.replace('\n', '\n ').strip()
else:
err('CalledProcessError: ' + str(e))
sys.exit(os.EX_IOERR)
except IOError as e:
if args.verbose:
traceback.print_exc()
else:
err('IOError: ' + str(e))
sys.exit(os.EX_IOERR)
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