test_misc.doctest - miscellaneous tests

Copyright (C) 2014-2016 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


>>> from binascii import a2b_hex, b2a_hex
>>> def tostr(x):
...     return str(x.decode())
>>> def decode(f):
...     return lambda x: tostr(f(x))
>>> b2a_hex = decode(b2a_hex)
>>> import datetime
>>> now = datetime.datetime(2016, 3, 23, 0, 0, 0)
>>> import dateutil.tz

>>> from pskc import PSKC


This tests the most minimal valid PSKC file with one empty key.

>>> try:
...     from StringIO import StringIO
... except ImportError:
...     from io import StringIO
>>> minimal_pskc = StringIO('''
... <?xml version="1.0"?>
... <KeyContainer xmlns="urn:ietf:params:xml:ns:keyprov:pskc" Version="1.0">
...   <KeyPackage/>
... </KeyContainer>
... '''.strip())
>>> pskc = PSKC(minimal_pskc)
>>> len(pskc.keys)
0
>>> len(pskc.devices)
1


Check creation of empty PSKC structure and adding an empty key to the list.

>>> pskc = PSKC()
>>> key = pskc.add_key(id='123')
>>> key.id
'123'
>>> key.secret is None
True


We can also put device-specific properties in a device:

>>> pskc = PSKC()
>>> device = pskc.add_device(manufacturer='Tokens INC.')
>>> len(pskc.keys)
0
>>> key = device.add_key(id='123', serial='456')
>>> len(pskc.keys)
1
>>> key.id
'123'
>>> key.manufacturer
'Tokens INC.'
>>> device.serial
'456'


Adding a key or device with unknown attributes raises an error.

>>> key = pskc.add_key(foo='bar')  # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
    ...
AttributeError
>>> device.add_key(foo='bar')  # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
    ...
AttributeError
>>> device = pskc.add_device(foo='bar')  # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
    ...
AttributeError


Setting secret, counter, etc. also works

>>> key = pskc.add_key(secret='VERYSECRET')
>>> key.counter = 10
>>> key.secret
'VERYSECRET'
>>> key.counter
10


Setting encryption key name and algorithm also works.

>>> pskc.encryption.key_name = 'Test encryption key'
>>> pskc.encryption.key_names
['Test encryption key']
>>> pskc.encryption.algorithm is None
True
>>> pskc.encryption.algorithm = 'aes128-cbc'
>>> pskc.encryption.algorithm
'http://www.w3.org/2001/04/xmlenc#aes128-cbc'
>>> pskc.encryption.algorithm_key_lengths
[16]
>>> pskc.encryption.algorithm = '3des-cbc'
>>> pskc.encryption.algorithm
'http://www.w3.org/2001/04/xmlenc#tripledes-cbc'
>>> pskc.encryption.algorithm_key_lengths
[16, 24]
>>> pskc.encryption.algorithm = 'none'
>>> pskc.encryption.algorithm is None
True
>>> pskc.encryption.algorithm_key_lengths  # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
    ...
DecryptionError: No algorithm specified


Load an PSKC file with an odd namespace.

>>> pskc = PSKC('tests/misc/odd-namespace.pskcxml')
>>> pskc.version
'1.0'
>>> pskc.id
'exampleID1'
>>> key = pskc.keys[0]
>>> key.id
'12345678'
>>> key.issuer
'Issuer-A'
>>> tostr(key.secret)
'1234'


Load a PSKC file that uses the xenc11 namespace for the PBKDF2 parameters.

>>> pskc = PSKC('tests/misc/SampleFullyQualifiedNS.xml')
>>> pskc.encryption.key_name
'PassPhrase'
>>> pskc.encryption.derive_key('3FCA3158035072D6')
>>> key = pskc.keys[0]
>>> b2a_hex(key.secret)
'09fbecfd0bf47910839e2eb05ffa10b95cd0390950ce32ab790583ed134171e0'
>>> key.check()
True


Empty PSKC files should raise a useful exception when trying to derive an
encryption key from a password.

>>> pskc = PSKC()
>>> pskc.encryption.derive_key('123456')  # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
    ...
KeyDerivationError: No algorithm specified


Integers can be represented in different ways in PSKC files.

>>> pskc = PSKC('tests/misc/integers.pskcxml')
>>> pskc.encryption.key = a2b_hex('12345678901234567890123456789012')
>>> [key.counter for key in pskc.keys]
[831791, 709791, 405834, 298507, 961392]


This tests key policy and unknown policy elements. The first key should have
all known policy elements set while other keys should have extra unknown
information added which should result in rejected usage.

>>> pskc = PSKC('tests/misc/policy.pskcxml')
>>> key = pskc.keys[0]
>>> key.policy.start_date
datetime.datetime(2006, 5, 1, 0, 0, tzinfo=tzutc())
>>> key.policy.expiry_date
datetime.datetime(2026, 5, 31, 0, 0, tzinfo=tzutc())
>>> key.policy.number_of_transactions
4321
>>> key.policy.key_usage
['OTP']
>>> key.policy.unknown_policy_elements
False
>>> key.policy.may_use()
True
>>> key.policy.may_use('OTP', datetime.datetime(2005, 4, 3, 0, 0, 0))
False
>>> key.policy.may_use('OTP', now)
True
>>> key.policy.may_use('OTP', datetime.datetime(2028, 12, 31, 0, 0, 0))
False
>>> key.policy.start_date = datetime.datetime.now() + \
...     datetime.timedelta(seconds=10)
>>> key.policy.may_use('OTP')
False
>>> key.policy.start_date = datetime.datetime.now(dateutil.tz.tzlocal()) - \
...     datetime.timedelta(seconds=10)
>>> key.policy.may_use('OTP')
True
>>> key = pskc.keys[1]
>>> key.policy.key_usage
['OTP']
>>> key.policy.unknown_policy_elements
True
>>> key.policy.may_use('OTP', now)
False
>>> key.policy.pin
'1234'
>>> key = pskc.keys[2]
>>> key.policy.key_usage
['OTP']
>>> key.policy.unknown_policy_elements
True
>>> key.policy.may_use('OTP', now)
False
>>> key.policy.pin is None
True
>>> key = pskc.keys[3]
>>> key.policy.key_usage
['OTP']
>>> key.policy.unknown_policy_elements
True
>>> key.policy.may_use('OTP', now)
False
>>> key.policy.pin is None
True


This checks the ChallengeFormat and ResponseFormat handling of keys and
specifically the attribute indicating presence of check digits.

>>> pskc = PSKC('tests/misc/checkdigits.pskcxml')
>>> for key in pskc.keys:
...     print('challenge %r %r %r %r' % (
...         key.challenge_encoding, key.challenge_min_length,
...         key.challenge_max_length, key.challenge_check))
...     print('response  %r %r %r' % (
...         key.response_encoding, key.response_length,
...         key.response_check))  #doctest: +REPORT_UDIFF
challenge 'DECIMAL' 12 34 True
response  'DECIMAL' 8 False
challenge 'DECIMAL' 56 78 False
response  'DECIMAL' 9 True
challenge 'DECIMAL' 16 87 False
response  'DECIMAL' 3 True
challenge 'HEXADECIMAL' 4 6 None
response  'ALPHANUMERIC' 6 None