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"""helpers for passlib unittests"""
#=============================================================================
# imports
#=============================================================================
from __future__ import with_statement
# core
from binascii import unhexlify
import contextlib
from functools import wraps, partial
import hashlib
import logging; log = logging.getLogger(__name__)
import random
import re
import os
import sys
import tempfile
import threading
import time
from passlib.exc import PasslibHashWarning, PasslibConfigWarning
from passlib.utils.compat import PY3, JYTHON
import warnings
from warnings import warn
# site
# pkg
from passlib import exc
from passlib.exc import MissingBackendError
import passlib.registry as registry
from passlib.tests.backports import TestCase as _TestCase, skip, skipIf, skipUnless, SkipTest
from passlib.utils import has_rounds_info, has_salt_info, rounds_cost_values, \
rng as sys_rng, getrandstr, is_ascii_safe, to_native_str, \
repeat_string, tick, batch
from passlib.utils.compat import iteritems, irange, u, unicode, PY2, nullcontext
from passlib.utils.decor import classproperty
import passlib.utils.handlers as uh
# local
__all__ = [
# util funcs
'TEST_MODE',
'set_file', 'get_file',
# unit testing
'TestCase',
'HandlerCase',
]
#=============================================================================
# environment detection
#=============================================================================
# figure out if we're running under GAE;
# some tests (e.g. FS writing) should be skipped.
# XXX: is there better way to do this?
try:
import google.appengine
except ImportError:
GAE = False
else:
GAE = True
def ensure_mtime_changed(path):
"""ensure file's mtime has changed"""
# NOTE: this is hack to deal w/ filesystems whose mtime resolution is >= 1s,
# when a test needs to be sure the mtime changed after writing to the file.
last = os.path.getmtime(path)
while os.path.getmtime(path) == last:
time.sleep(0.1)
os.utime(path, None)
def _get_timer_resolution(timer):
def sample():
start = cur = timer()
while start == cur:
cur = timer()
return cur-start
return min(sample() for _ in range(3))
TICK_RESOLUTION = _get_timer_resolution(tick)
#=============================================================================
# test mode
#=============================================================================
_TEST_MODES = ["quick", "default", "full"]
_test_mode = _TEST_MODES.index(os.environ.get("PASSLIB_TEST_MODE",
"default").strip().lower())
def TEST_MODE(min=None, max=None):
"""check if test for specified mode should be enabled.
``"quick"``
run the bare minimum tests to ensure functionality.
variable-cost hashes are tested at their lowest setting.
hash algorithms are only tested against the backend that will
be used on the current host. no fuzz testing is done.
``"default"``
same as ``"quick"``, except: hash algorithms are tested
at default levels, and a brief round of fuzz testing is done
for each hash.
``"full"``
extra regression and internal tests are enabled, hash algorithms are tested
against all available backends, unavailable ones are mocked whre possible,
additional time is devoted to fuzz testing.
"""
if min and _test_mode < _TEST_MODES.index(min):
return False
if max and _test_mode > _TEST_MODES.index(max):
return False
return True
#=============================================================================
# hash object inspection
#=============================================================================
def has_relaxed_setting(handler):
"""check if handler supports 'relaxed' kwd"""
# FIXME: I've been lazy, should probably just add 'relaxed' kwd
# to all handlers that derive from GenericHandler
# ignore wrapper classes for now.. though could introspec.
if hasattr(handler, "orig_prefix"):
return False
return 'relaxed' in handler.setting_kwds or issubclass(handler,
uh.GenericHandler)
def get_effective_rounds(handler, rounds=None):
"""get effective rounds value from handler"""
handler = unwrap_handler(handler)
return handler(rounds=rounds, use_defaults=True).rounds
def is_default_backend(handler, backend):
"""check if backend is the default for source"""
try:
orig = handler.get_backend()
except MissingBackendError:
return False
try:
handler.set_backend("default")
return handler.get_backend() == backend
finally:
handler.set_backend(orig)
def iter_alt_backends(handler, current=None, fallback=False):
"""
iterate over alternate backends available to handler.
.. warning::
not thread-safe due to has_backend() call
"""
if current is None:
current = handler.get_backend()
backends = handler.backends
idx = backends.index(current)+1 if fallback else 0
for backend in backends[idx:]:
if backend != current and handler.has_backend(backend):
yield backend
def get_alt_backend(*args, **kwds):
for backend in iter_alt_backends(*args, **kwds):
return backend
return None
def unwrap_handler(handler):
"""return original handler, removing any wrapper objects"""
while hasattr(handler, "wrapped"):
handler = handler.wrapped
return handler
def handler_derived_from(handler, base):
"""
test if <handler> was derived from <base> via <base.using()>.
"""
# XXX: need way to do this more formally via ifc,
# for now just hacking in the cases we encounter in testing.
if handler == base:
return True
elif isinstance(handler, uh.PrefixWrapper):
while handler:
if handler == base:
return True
# helper set by PrefixWrapper().using() just for this case...
handler = handler._derived_from
return False
elif isinstance(handler, type) and issubclass(handler, uh.MinimalHandler):
return issubclass(handler, base)
else:
raise NotImplementedError("don't know how to inspect handler: %r" % (handler,))
@contextlib.contextmanager
def patch_calc_min_rounds(handler):
"""
internal helper for do_config_encrypt() --
context manager which temporarily replaces handler's _calc_checksum()
with one that uses min_rounds; useful when trying to generate config
with high rounds value, but don't care if output is correct.
"""
if isinstance(handler, type) and issubclass(handler, uh.HasRounds):
# XXX: also require GenericHandler for this branch?
wrapped = handler._calc_checksum
def wrapper(self, *args, **kwds):
rounds = self.rounds
try:
self.rounds = self.min_rounds
return wrapped(self, *args, **kwds)
finally:
self.rounds = rounds
handler._calc_checksum = wrapper
try:
yield
finally:
handler._calc_checksum = wrapped
elif isinstance(handler, uh.PrefixWrapper):
with patch_calc_min_rounds(handler.wrapped):
yield
else:
yield
return
#=============================================================================
# misc helpers
#=============================================================================
def set_file(path, content):
"""set file to specified bytes"""
if isinstance(content, unicode):
content = content.encode("utf-8")
with open(path, "wb") as fh:
fh.write(content)
def get_file(path):
"""read file as bytes"""
with open(path, "rb") as fh:
return fh.read()
def tonn(source):
"""convert native string to non-native string"""
if not isinstance(source, str):
return source
elif PY3:
return source.encode("utf-8")
else:
try:
return source.decode("utf-8")
except UnicodeDecodeError:
return source.decode("latin-1")
def hb(source):
"""
helper for represent byte strings in hex.
usage: ``hb("deadbeef23")``
"""
return unhexlify(re.sub(r"\s", "", source))
def limit(value, lower, upper):
if value < lower:
return lower
elif value > upper:
return upper
return value
def quicksleep(delay):
"""because time.sleep() doesn't even have 10ms accuracy on some OSes"""
start = tick()
while tick()-start < delay:
pass
def time_call(func, setup=None, maxtime=1, bestof=10):
"""
timeit() wrapper which tries to get as accurate a measurement as possible w/in maxtime seconds.
:returns:
``(avg_seconds_per_call, log10_number_of_repetitions)``
"""
from timeit import Timer
from math import log
timer = Timer(func, setup=setup or '')
number = 1
end = tick() + maxtime
while True:
delta = min(timer.repeat(bestof, number))
if tick() >= end:
return delta/number, int(log(number, 10))
number *= 10
def run_with_fixed_seeds(count=128, master_seed=0x243F6A8885A308D3):
"""
decorator run test method w/ multiple fixed seeds.
"""
def builder(func):
@wraps(func)
def wrapper(*args, **kwds):
rng = random.Random(master_seed)
for _ in irange(count):
kwds['seed'] = rng.getrandbits(32)
func(*args, **kwds)
return wrapper
return builder
#=============================================================================
# custom test harness
#=============================================================================
class TestCase(_TestCase):
"""passlib-specific test case class
this class adds a number of features to the standard TestCase...
* common prefix for all test descriptions
* resets warnings filter & registry for every test
* tweaks to message formatting
* __msg__ kwd added to assertRaises()
* suite of methods for matching against warnings
"""
#===================================================================
# add various custom features
#===================================================================
#---------------------------------------------------------------
# make it easy for test cases to add common prefix to shortDescription
#---------------------------------------------------------------
# string prepended to all tests in TestCase
descriptionPrefix = None
def shortDescription(self):
"""wrap shortDescription() method to prepend descriptionPrefix"""
desc = super(TestCase, self).shortDescription()
prefix = self.descriptionPrefix
if prefix:
desc = "%s: %s" % (prefix, desc or str(self))
return desc
#---------------------------------------------------------------
# hack things so nose and ut2 both skip subclasses who have
# "__unittest_skip=True" set, or whose names start with "_"
#---------------------------------------------------------------
@classproperty
def __unittest_skip__(cls):
# NOTE: this attr is technically a unittest2 internal detail.
name = cls.__name__
return name.startswith("_") or \
getattr(cls, "_%s__unittest_skip" % name, False)
@classproperty
def __test__(cls):
# make nose just proxy __unittest_skip__
return not cls.__unittest_skip__
# flag to skip *this* class
__unittest_skip = True
#---------------------------------------------------------------
# reset warning filters & registry before each test
#---------------------------------------------------------------
# flag to reset all warning filters & ignore state
resetWarningState = True
def setUp(self):
super(TestCase, self).setUp()
self.setUpWarnings()
# have uh.debug_only_repr() return real values for duration of test
self.patchAttr(exc, "ENABLE_DEBUG_ONLY_REPR", True)
def setUpWarnings(self):
"""helper to init warning filters before subclass setUp()"""
if self.resetWarningState:
ctx = reset_warnings()
ctx.__enter__()
self.addCleanup(ctx.__exit__)
# ignore security warnings, tests may deliberately cause these
# TODO: may want to filter out a few of this, but not blanket filter...
# warnings.filterwarnings("ignore", category=exc.PasslibSecurityWarning)
# ignore warnings about PasswordHash features deprecated in 1.7
# TODO: should be cleaned in 2.0, when support will be dropped.
# should be kept until then, so we test the legacy paths.
warnings.filterwarnings("ignore", r"the method .*\.(encrypt|genconfig|genhash)\(\) is deprecated")
warnings.filterwarnings("ignore", r"the 'vary_rounds' option is deprecated")
warnings.filterwarnings("ignore", r"Support for `(py-bcrypt|bcryptor)` is deprecated")
#---------------------------------------------------------------
# tweak message formatting so longMessage mode is only enabled
# if msg ends with ":", and turn on longMessage by default.
#---------------------------------------------------------------
longMessage = True
def _formatMessage(self, msg, std):
if self.longMessage and msg and msg.rstrip().endswith(":"):
return '%s %s' % (msg.rstrip(), std)
else:
return msg or std
#---------------------------------------------------------------
# override assertRaises() to support '__msg__' keyword,
# and to return the caught exception for further examination
#---------------------------------------------------------------
def assertRaises(self, _exc_type, _callable=None, *args, **kwds):
msg = kwds.pop("__msg__", None)
if _callable is None:
# FIXME: this ignores 'msg'
return super(TestCase, self).assertRaises(_exc_type, None,
*args, **kwds)
try:
result = _callable(*args, **kwds)
except _exc_type as err:
return err
std = "function returned %r, expected it to raise %r" % (result,
_exc_type)
raise self.failureException(self._formatMessage(msg, std))
#---------------------------------------------------------------
# forbid a bunch of deprecated aliases so I stop using them
#---------------------------------------------------------------
def assertEquals(self, *a, **k):
raise AssertionError("this alias is deprecated by unittest2")
assertNotEquals = assertRegexMatches = assertEquals
#===================================================================
# custom methods for matching warnings
#===================================================================
def assertWarning(self, warning,
message_re=None, message=None,
category=None,
filename_re=None, filename=None,
lineno=None,
msg=None,
):
"""check if warning matches specified parameters.
'warning' is the instance of Warning to match against;
can also be instance of WarningMessage (as returned by catch_warnings).
"""
# check input type
if hasattr(warning, "category"):
# resolve WarningMessage -> Warning, but preserve original
wmsg = warning
warning = warning.message
else:
# no original WarningMessage, passed raw Warning
wmsg = None
# tests that can use a warning instance or WarningMessage object
if message:
self.assertEqual(str(warning), message, msg)
if message_re:
self.assertRegex(str(warning), message_re, msg)
if category:
self.assertIsInstance(warning, category, msg)
# tests that require a WarningMessage object
if filename or filename_re:
if not wmsg:
raise TypeError("matching on filename requires a "
"WarningMessage instance")
real = wmsg.filename
if real.endswith(".pyc") or real.endswith(".pyo"):
# FIXME: should use a stdlib call to resolve this back
# to module's original filename.
real = real[:-1]
if filename:
self.assertEqual(real, filename, msg)
if filename_re:
self.assertRegex(real, filename_re, msg)
if lineno:
if not wmsg:
raise TypeError("matching on lineno requires a "
"WarningMessage instance")
self.assertEqual(wmsg.lineno, lineno, msg)
class _AssertWarningList(warnings.catch_warnings):
"""context manager for assertWarningList()"""
def __init__(self, case, **kwds):
self.case = case
self.kwds = kwds
self.__super = super(TestCase._AssertWarningList, self)
self.__super.__init__(record=True)
def __enter__(self):
self.log = self.__super.__enter__()
def __exit__(self, *exc_info):
self.__super.__exit__(*exc_info)
if exc_info[0] is None:
self.case.assertWarningList(self.log, **self.kwds)
def assertWarningList(self, wlist=None, desc=None, msg=None):
"""check that warning list (e.g. from catch_warnings) matches pattern"""
if desc is None:
assert wlist is not None
return self._AssertWarningList(self, desc=wlist, msg=msg)
# TODO: make this display better diff of *which* warnings did not match
assert desc is not None
if not isinstance(desc, (list,tuple)):
desc = [desc]
for idx, entry in enumerate(desc):
if isinstance(entry, str):
entry = dict(message_re=entry)
elif isinstance(entry, type) and issubclass(entry, Warning):
entry = dict(category=entry)
elif not isinstance(entry, dict):
raise TypeError("entry must be str, warning, or dict")
try:
data = wlist[idx]
except IndexError:
break
self.assertWarning(data, msg=msg, **entry)
else:
if len(wlist) == len(desc):
return
std = "expected %d warnings, found %d: wlist=%s desc=%r" % \
(len(desc), len(wlist), self._formatWarningList(wlist), desc)
raise self.failureException(self._formatMessage(msg, std))
def consumeWarningList(self, wlist, desc=None, *args, **kwds):
"""[deprecated] assertWarningList() variant that clears list afterwards"""
if desc is None:
desc = []
self.assertWarningList(wlist, desc, *args, **kwds)
del wlist[:]
def _formatWarning(self, entry):
tail = ""
if hasattr(entry, "message"):
# WarningMessage instance.
tail = " filename=%r lineno=%r" % (entry.filename, entry.lineno)
if entry.line:
tail += " line=%r" % (entry.line,)
entry = entry.message
cls = type(entry)
return "<%s.%s message=%r%s>" % (cls.__module__, cls.__name__,
str(entry), tail)
def _formatWarningList(self, wlist):
return "[%s]" % ", ".join(self._formatWarning(entry) for entry in wlist)
#===================================================================
# capability tests
#===================================================================
def require_stringprep(self):
"""helper to skip test if stringprep is missing"""
from passlib.utils import stringprep
if not stringprep:
from passlib.utils import _stringprep_missing_reason
raise self.skipTest("not available - stringprep module is " +
_stringprep_missing_reason)
def require_TEST_MODE(self, level):
"""skip test for all PASSLIB_TEST_MODE values below <level>"""
if not TEST_MODE(level):
raise self.skipTest("requires >= %r test mode" % level)
def require_writeable_filesystem(self):
"""skip test if writeable FS not available"""
if GAE:
return self.skipTest("GAE doesn't offer read/write filesystem access")
#===================================================================
# reproducible random helpers
#===================================================================
#: global thread lock for random state
#: XXX: could split into global & per-instance locks if need be
_random_global_lock = threading.Lock()
#: cache of global seed value, initialized on first call to getRandom()
_random_global_seed = None
#: per-instance cache of name -> RNG
_random_cache = None
def getRandom(self, name="default", seed=None):
"""
Return a :class:`random.Random` object for current test method to use.
Within an instance, multiple calls with the same name will return
the same object.
When first created, each RNG will be seeded with value derived from
a global seed, the test class module & name, the current test method name,
and the **name** parameter.
The global seed taken from the $RANDOM_TEST_SEED env var,
the $PYTHONHASHSEED env var, or a randomly generated the
first time this method is called. In all cases, the value
is logged for reproducibility.
:param name:
name to uniquely identify separate RNGs w/in a test
(e.g. for threaded tests).
:param seed:
override global seed when initialzing rng.
:rtype: random.Random
"""
# check cache
cache = self._random_cache
if cache and name in cache:
return cache[name]
with self._random_global_lock:
# check cache again, and initialize it
cache = self._random_cache
if cache and name in cache:
return cache[name]
elif not cache:
cache = self._random_cache = {}
# init global seed
global_seed = seed or TestCase._random_global_seed
if global_seed is None:
# NOTE: checking PYTHONHASHSEED, because if that's set,
# the test runner wants something reproducible.
global_seed = TestCase._random_global_seed = \
int(os.environ.get("RANDOM_TEST_SEED") or
os.environ.get("PYTHONHASHSEED") or
sys_rng.getrandbits(32))
# XXX: would it be better to print() this?
log.info("using RANDOM_TEST_SEED=%d", global_seed)
# create seed
cls = type(self)
source = "\n".join([str(global_seed), cls.__module__, cls.__name__,
self._testMethodName, name])
digest = hashlib.sha256(source.encode("utf-8")).hexdigest()
seed = int(digest[:16], 16)
# create rng
value = cache[name] = random.Random(seed)
return value
#===================================================================
# subtests
#===================================================================
has_real_subtest = hasattr(_TestCase, "subTest")
@contextlib.contextmanager
def subTest(self, *args, **kwds):
"""
wrapper/backport for .subTest() which also traps SkipTest errors.
(see source for details)
"""
# this function works around two things:
# * TestCase.subTest() wasn't added until Py34; so for older python versions,
# we either need unittest2 installed, or provide stub of our own.
# this method provides a stub if needed (based on .has_real_subtest check)
#
# * as 2020-10-08, .subTest() doesn't play nicely w/ .skipTest();
# and also makes it hard to debug which subtest had a failure.
# (see https://bugs.python.org/issue25894 and https://bugs.python.org/issue35327)
# this method traps skipTest exceptions, and adds some logging to help debug
# which subtest caused the issue.
# setup way to log subtest info
# XXX: would like better way to inject messages into test output;
# but this at least gets us something for debugging...
# NOTE: this hack will miss parent params if called from nested .subTest()
def _render_title(_msg=None, **params):
out = ("[%s] " % _msg if _msg else "")
if params:
out += "(%s)" % " ".join("%s=%r" % tuple(item) for item in params.items())
return out.strip() or "<subtest>"
test_log = self.getLogger()
title = _render_title(*args, **kwds)
# use real subtest manager if available
if self.has_real_subtest:
ctx = super(TestCase, self).subTest(*args, **kwds)
else:
ctx = nullcontext()
# run the subtest
with ctx:
test_log.info("running subtest: %s", title)
try:
yield
except SkipTest:
# silence "SkipTest" exceptions, want to keep running next subtest.
test_log.info("subtest skipped: %s", title)
pass
except Exception as err:
# log unhandled exception occurred
# (assuming traceback will be reported up higher, so not bothering here)
test_log.warning("subtest failed: %s: %s: %r", title, type(err).__name__, str(err))
raise
# XXX: check for "failed" state in ``self._outcome`` before writing this?
test_log.info("subtest passed: %s", title)
#===================================================================
# other
#===================================================================
_mktemp_queue = None
def mktemp(self, *args, **kwds):
"""create temp file that's cleaned up at end of test"""
self.require_writeable_filesystem()
fd, path = tempfile.mkstemp(*args, **kwds)
os.close(fd)
queue = self._mktemp_queue
if queue is None:
queue = self._mktemp_queue = []
def cleaner():
for path in queue:
if os.path.exists(path):
os.remove(path)
del queue[:]
self.addCleanup(cleaner)
queue.append(path)
return path
def patchAttr(self, obj, attr, value, require_existing=True, wrap=False):
"""monkeypatch object value, restoring original value on cleanup"""
try:
orig = getattr(obj, attr)
except AttributeError:
if require_existing:
raise
def cleanup():
try:
delattr(obj, attr)
except AttributeError:
pass
self.addCleanup(cleanup)
else:
self.addCleanup(setattr, obj, attr, orig)
if wrap:
value = partial(value, orig)
wraps(orig)(value)
setattr(obj, attr, value)
def getLogger(self):
"""
return logger named after current test.
"""
cls = type(self)
# NOTE: conditional on qualname for PY2 compat
path = cls.__module__ + "." + getattr(cls, "__qualname__", cls.__name__)
name = self._testMethodName
if name:
path = path + "." + name
return logging.getLogger(path)
#===================================================================
# eoc
#===================================================================
#=============================================================================
# other unittest helpers
#=============================================================================
RESERVED_BACKEND_NAMES = ["any", "default"]
def doesnt_require_backend(func):
"""
decorator for HandlerCase.create_backend_case() --
used to decorate methods that should be run even if backend isn't present
(by default, full test suite is skipped when backend is missing)
NOTE: tests decorated with this should not rely on handler have expected (or any!) backend.
"""
func._doesnt_require_backend = True
return func
class HandlerCase(TestCase):
"""base class for testing password hash handlers (esp passlib.utils.handlers subclasses)
In order to use this to test a handler,
create a subclass will all the appropriate attributes
filled as listed in the example below,
and run the subclass via unittest.
.. todo::
Document all of the options HandlerCase offers.
.. note::
This is subclass of :class:`unittest.TestCase`
(or :class:`unittest2.TestCase` if available).
"""
#===================================================================
# class attrs - should be filled in by subclass
#===================================================================
#---------------------------------------------------------------
# handler setup
#---------------------------------------------------------------
# handler class to test [required]
handler = None
# if set, run tests against specified backend
backend = None
#---------------------------------------------------------------
# test vectors
#---------------------------------------------------------------
# list of (secret, hash) tuples which are known to be correct
known_correct_hashes = []
# list of (config, secret, hash) tuples are known to be correct
known_correct_configs = []
# list of (alt_hash, secret, hash) tuples, where alt_hash is a hash
# using an alternate representation that should be recognized and verify
# correctly, but should be corrected to match hash when passed through
# genhash()
known_alternate_hashes = []
# hashes so malformed they aren't even identified properly
known_unidentified_hashes = []
# hashes which are identifiabled but malformed - they should identify()
# as True, but cause an error when passed to genhash/verify.
known_malformed_hashes = []
# list of (handler name, hash) pairs for other algorithm's hashes that
# handler shouldn't identify as belonging to it this list should generally
# be sufficient (if handler name in list, that entry will be skipped)
known_other_hashes = [
('des_crypt', '6f8c114b58f2c'),
('md5_crypt', '$1$dOHYPKoP$tnxS1T8Q6VVn3kpV8cN6o.'),
('sha512_crypt', "$6$rounds=123456$asaltof16chars..$BtCwjqMJGx5hrJhZywW"
"vt0RLE8uZ4oPwcelCjmw2kSYu.Ec6ycULevoBK25fs2xXgMNrCzIMVcgEJAstJeonj1"),
]
# passwords used to test basic hash behavior - generally
# don't need to be overidden.
stock_passwords = [
u("test"),
u("\u20AC\u00A5$"),
b'\xe2\x82\xac\xc2\xa5$'
]
#---------------------------------------------------------------
# option flags
#---------------------------------------------------------------
# whether hash is case insensitive
# True, False, or special value "verify-only" (which indicates
# hash contains case-sensitive portion, but verifies is case-insensitive)
secret_case_insensitive = False
# flag if scheme accepts ALL hash strings (e.g. plaintext)
accepts_all_hashes = False
# flag if scheme has "is_disabled" set, and contains 'salted' data
disabled_contains_salt = False
# flag/hack to filter PasslibHashWarning issued by test_72_configs()
filter_config_warnings = False
# forbid certain characters in passwords
@classproperty
def forbidden_characters(cls):
# anything that supports crypt() interface should forbid null chars,
# since crypt() uses null-terminated strings.
if 'os_crypt' in getattr(cls.handler, "backends", ()):
return b"\x00"
return None
#===================================================================
# internal class attrs
#===================================================================
__unittest_skip = True
@property
def descriptionPrefix(self):
handler = self.handler
name = handler.name
if hasattr(handler, "get_backend"):
name += " (%s backend)" % (handler.get_backend(),)
return name
#===================================================================
# support methods
#===================================================================
#---------------------------------------------------------------
# configuration helpers
#---------------------------------------------------------------
@classmethod
def iter_known_hashes(cls):
"""iterate through known (secret, hash) pairs"""
for secret, hash in cls.known_correct_hashes:
yield secret, hash
for config, secret, hash in cls.known_correct_configs:
yield secret, hash
for alt, secret, hash in cls.known_alternate_hashes:
yield secret, hash
def get_sample_hash(self):
"""test random sample secret/hash pair"""
known = list(self.iter_known_hashes())
return self.getRandom().choice(known)
#---------------------------------------------------------------
# test helpers
#---------------------------------------------------------------
def check_verify(self, secret, hash, msg=None, negate=False):
"""helper to check verify() outcome, honoring is_disabled_handler"""
result = self.do_verify(secret, hash)
self.assertTrue(result is True or result is False,
"verify() returned non-boolean value: %r" % (result,))
if self.handler.is_disabled or negate:
if not result:
return
if not msg:
msg = ("verify incorrectly returned True: secret=%r, hash=%r" %
(secret, hash))
raise self.failureException(msg)
else:
if result:
return
if not msg:
msg = "verify failed: secret=%r, hash=%r" % (secret, hash)
raise self.failureException(msg)
def check_returned_native_str(self, result, func_name):
self.assertIsInstance(result, str,
"%s() failed to return native string: %r" % (func_name, result,))
#---------------------------------------------------------------
# PasswordHash helpers - wraps all calls to PasswordHash api,
# so that subclasses can fill in defaults and account for other specialized behavior
#---------------------------------------------------------------
def populate_settings(self, kwds):
"""subclassable method to populate default settings"""
# use lower rounds settings for certain test modes
handler = self.handler
if 'rounds' in handler.setting_kwds and 'rounds' not in kwds:
mn = handler.min_rounds
df = handler.default_rounds
if TEST_MODE(max="quick"):
# use minimum rounds for quick mode
kwds['rounds'] = max(3, mn)
else:
# use default/16 otherwise
factor = 3
if getattr(handler, "rounds_cost", None) == "log2":
df -= factor
else:
df //= (1<<factor)
kwds['rounds'] = max(3, mn, df)
def populate_context(self, secret, kwds):
"""subclassable method allowing 'secret' to be encode context kwds"""
return secret
# TODO: rename to do_hash() to match new API
def do_encrypt(self, secret, use_encrypt=False, handler=None, context=None, **settings):
"""call handler's hash() method with specified options"""
self.populate_settings(settings)
if context is None:
context = {}
secret = self.populate_context(secret, context)
if use_encrypt:
# use legacy 1.6 api
warnings = []
if settings:
context.update(**settings)
warnings.append("passing settings to.*is deprecated")
with self.assertWarningList(warnings):
return (handler or self.handler).encrypt(secret, **context)
else:
# use 1.7 api
return (handler or self.handler).using(**settings).hash(secret, **context)
def do_verify(self, secret, hash, handler=None, **kwds):
"""call handler's verify method"""
secret = self.populate_context(secret, kwds)
return (handler or self.handler).verify(secret, hash, **kwds)
def do_identify(self, hash):
"""call handler's identify method"""
return self.handler.identify(hash)
def do_genconfig(self, **kwds):
"""call handler's genconfig method with specified options"""
self.populate_settings(kwds)
return self.handler.genconfig(**kwds)
def do_genhash(self, secret, config, **kwds):
"""call handler's genhash method with specified options"""
secret = self.populate_context(secret, kwds)
return self.handler.genhash(secret, config, **kwds)
def do_stub_encrypt(self, handler=None, context=None, **settings):
"""
return sample hash for handler, w/o caring if digest is valid
(uses some monkeypatching to minimize digest calculation cost)
"""
handler = (handler or self.handler).using(**settings)
if context is None:
context = {}
secret = self.populate_context("", context)
with patch_calc_min_rounds(handler):
return handler.hash(secret, **context)
#---------------------------------------------------------------
# automatically generate subclasses for testing specific backends,
# and other backend helpers
#---------------------------------------------------------------
#: default message used by _get_skip_backend_reason()
_BACKEND_NOT_AVAILABLE = "backend not available"
@classmethod
def _get_skip_backend_reason(cls, backend):
"""
helper for create_backend_case() --
returns reason to skip backend, or None if backend should be tested
"""
handler = cls.handler
if not is_default_backend(handler, backend) and not TEST_MODE("full"):
return "only default backend is being tested"
if handler.has_backend(backend):
return None
return cls._BACKEND_NOT_AVAILABLE
@classmethod
def create_backend_case(cls, backend):
handler = cls.handler
name = handler.name
assert hasattr(handler, "backends"), "handler must support uh.HasManyBackends protocol"
assert backend in handler.backends, "unknown backend: %r" % (backend,)
bases = (cls,)
if backend == "os_crypt":
bases += (OsCryptMixin,)
subcls = type(
"%s_%s_test" % (name, backend),
bases,
dict(
descriptionPrefix="%s (%s backend)" % (name, backend),
backend=backend,
_skip_backend_reason=cls._get_skip_backend_reason(backend),
__module__=cls.__module__,
)
)
return subcls
#: flag for setUp() indicating this class is disabled due to backend issue;
#: this is only set for dynamic subclasses generated by create_backend_case()
_skip_backend_reason = None
def _test_requires_backend(self):
"""
check if current test method decorated with doesnt_require_backend() helper
"""
meth = getattr(self, self._testMethodName, None)
return not getattr(meth, "_doesnt_require_backend", False)
#===================================================================
# setup
#===================================================================
def setUp(self):
# check if test is disabled due to missing backend;
# and that it wasn't exempted via @doesnt_require_backend() decorator
test_requires_backend = self._test_requires_backend()
if test_requires_backend and self._skip_backend_reason:
raise self.skipTest(self._skip_backend_reason)
super(HandlerCase, self).setUp()
# if needed, select specific backend for duration of test
# NOTE: skipping this if create_backend_case() signalled we're skipping backend
# (can only get here for @doesnt_require_backend decorated methods)
handler = self.handler
backend = self.backend
if backend:
if not hasattr(handler, "set_backend"):
raise RuntimeError("handler doesn't support multiple backends")
try:
self.addCleanup(handler.set_backend, handler.get_backend())
handler.set_backend(backend)
except uh.exc.MissingBackendError:
if test_requires_backend:
raise
# else test is decorated with @doesnt_require_backend, let it through.
# patch some RNG references so they're reproducible.
from passlib.utils import handlers
self.patchAttr(handlers, "rng", self.getRandom("salt generator"))
#===================================================================
# basic tests
#===================================================================
def test_01_required_attributes(self):
"""validate required attributes"""
handler = self.handler
def ga(name):
return getattr(handler, name, None)
#
# name should be a str, and valid
#
name = ga("name")
self.assertTrue(name, "name not defined:")
self.assertIsInstance(name, str, "name must be native str")
self.assertTrue(name.lower() == name, "name not lower-case:")
self.assertTrue(re.match("^[a-z0-9_]+$", name),
"name must be alphanum + underscore: %r" % (name,))
#
# setting_kwds should be specified
#
settings = ga("setting_kwds")
self.assertTrue(settings is not None, "setting_kwds must be defined:")
self.assertIsInstance(settings, tuple, "setting_kwds must be a tuple:")
#
# context_kwds should be specified
#
context = ga("context_kwds")
self.assertTrue(context is not None, "context_kwds must be defined:")
self.assertIsInstance(context, tuple, "context_kwds must be a tuple:")
# XXX: any more checks needed?
def test_02_config_workflow(self):
"""test basic config-string workflow
this tests that genconfig() returns the expected types,
and that identify() and genhash() handle the result correctly.
"""
#
# genconfig() should return native string.
# NOTE: prior to 1.7 could return None, but that's no longer allowed.
#
config = self.do_genconfig()
self.check_returned_native_str(config, "genconfig")
#
# genhash() should always accept genconfig()'s output,
# whether str OR None.
#
result = self.do_genhash('stub', config)
self.check_returned_native_str(result, "genhash")
#
# verify() should never accept config strings
#
# NOTE: changed as of 1.7 -- previously, .verify() should have
# rejected partial config strings returned by genconfig().
# as of 1.7, that feature is deprecated, and genconfig()
# always returns a hash (usually of the empty string)
# so verify should always accept it's output
self.do_verify('', config) # usually true, but not required by protocol
#
# identify() should positively identify config strings if not None.
#
# NOTE: changed as of 1.7 -- genconfig() previously might return None,
# now must always return valid hash
self.assertTrue(self.do_identify(config),
"identify() failed to identify genconfig() output: %r" %
(config,))
def test_02_using_workflow(self):
"""test basic using() workflow"""
handler = self.handler
subcls = handler.using()
self.assertIsNot(subcls, handler)
self.assertEqual(subcls.name, handler.name)
# NOTE: other info attrs should match as well, just testing basic behavior.
# NOTE: mixin-specific args like using(min_rounds=xxx) tested later.
def test_03_hash_workflow(self, use_16_legacy=False):
"""test basic hash-string workflow.
this tests that hash()'s hashes are accepted
by verify() and identify(), and regenerated correctly by genhash().
the test is run against a couple of different stock passwords.
"""
wrong_secret = 'stub'
for secret in self.stock_passwords:
#
# hash() should generate native str hash
#
result = self.do_encrypt(secret, use_encrypt=use_16_legacy)
self.check_returned_native_str(result, "hash")
#
# verify() should work only against secret
#
self.check_verify(secret, result)
self.check_verify(wrong_secret, result, negate=True)
#
# genhash() should reproduce original hash
#
other = self.do_genhash(secret, result)
self.check_returned_native_str(other, "genhash")
if self.handler.is_disabled and self.disabled_contains_salt:
self.assertNotEqual(other, result, "genhash() failed to salt result "
"hash: secret=%r hash=%r: result=%r" %
(secret, result, other))
else:
self.assertEqual(other, result, "genhash() failed to reproduce "
"hash: secret=%r hash=%r: result=%r" %
(secret, result, other))
#
# genhash() should NOT reproduce original hash for wrong password
#
other = self.do_genhash(wrong_secret, result)
self.check_returned_native_str(other, "genhash")
if self.handler.is_disabled and not self.disabled_contains_salt:
self.assertEqual(other, result, "genhash() failed to reproduce "
"disabled-hash: secret=%r hash=%r other_secret=%r: result=%r" %
(secret, result, wrong_secret, other))
else:
self.assertNotEqual(other, result, "genhash() duplicated "
"hash: secret=%r hash=%r wrong_secret=%r: result=%r" %
(secret, result, wrong_secret, other))
#
# identify() should positively identify hash
#
self.assertTrue(self.do_identify(result))
def test_03_legacy_hash_workflow(self):
"""test hash-string workflow with legacy .encrypt() & .genhash() methods"""
self.test_03_hash_workflow(use_16_legacy=True)
def test_04_hash_types(self):
"""test hashes can be unicode or bytes"""
# this runs through workflow similar to 03, but wraps
# everything using tonn() so we test unicode under py2,
# and bytes under py3.
# hash using non-native secret
result = self.do_encrypt(tonn('stub'))
self.check_returned_native_str(result, "hash")
# verify using non-native hash
self.check_verify('stub', tonn(result))
# verify using non-native hash AND secret
self.check_verify(tonn('stub'), tonn(result))
# genhash using non-native hash
other = self.do_genhash('stub', tonn(result))
self.check_returned_native_str(other, "genhash")
if self.handler.is_disabled and self.disabled_contains_salt:
self.assertNotEqual(other, result)
else:
self.assertEqual(other, result)
# genhash using non-native hash AND secret
other = self.do_genhash(tonn('stub'), tonn(result))
self.check_returned_native_str(other, "genhash")
if self.handler.is_disabled and self.disabled_contains_salt:
self.assertNotEqual(other, result)
else:
self.assertEqual(other, result)
# identify using non-native hash
self.assertTrue(self.do_identify(tonn(result)))
def test_05_backends(self):
"""test multi-backend support"""
# check that handler supports multiple backends
handler = self.handler
if not hasattr(handler, "set_backend"):
raise self.skipTest("handler only has one backend")
# add cleanup func to restore old backend
self.addCleanup(handler.set_backend, handler.get_backend())
# run through each backend, make sure it works
for backend in handler.backends:
#
# validate backend name
#
self.assertIsInstance(backend, str)
self.assertNotIn(backend, RESERVED_BACKEND_NAMES,
"invalid backend name: %r" % (backend,))
#
# ensure has_backend() returns bool value
#
ret = handler.has_backend(backend)
if ret is True:
# verify backend can be loaded
handler.set_backend(backend)
self.assertEqual(handler.get_backend(), backend)
elif ret is False:
# verify backend CAN'T be loaded
self.assertRaises(MissingBackendError, handler.set_backend,
backend)
else:
# didn't return boolean object. commonly fails due to
# use of 'classmethod' decorator instead of 'classproperty'
raise TypeError("has_backend(%r) returned invalid "
"value: %r" % (backend, ret))
#===================================================================
# salts
#===================================================================
def require_salt(self):
if 'salt' not in self.handler.setting_kwds:
raise self.skipTest("handler doesn't have salt")
def require_salt_info(self):
self.require_salt()
if not has_salt_info(self.handler):
raise self.skipTest("handler doesn't provide salt info")
def test_10_optional_salt_attributes(self):
"""validate optional salt attributes"""
self.require_salt_info()
AssertionError = self.failureException
cls = self.handler
# check max_salt_size
mx_set = (cls.max_salt_size is not None)
if mx_set and cls.max_salt_size < 1:
raise AssertionError("max_salt_chars must be >= 1")
# check min_salt_size
if cls.min_salt_size < 0:
raise AssertionError("min_salt_chars must be >= 0")
if mx_set and cls.min_salt_size > cls.max_salt_size:
raise AssertionError("min_salt_chars must be <= max_salt_chars")
# check default_salt_size
if cls.default_salt_size < cls.min_salt_size:
raise AssertionError("default_salt_size must be >= min_salt_size")
if mx_set and cls.default_salt_size > cls.max_salt_size:
raise AssertionError("default_salt_size must be <= max_salt_size")
# check for 'salt_size' keyword
# NOTE: skipping warning if default salt size is already maxed out
# (might change that in future)
if 'salt_size' not in cls.setting_kwds and (not mx_set or cls.default_salt_size < cls.max_salt_size):
warn('%s: hash handler supports range of salt sizes, '
'but doesn\'t offer \'salt_size\' setting' % (cls.name,))
# check salt_chars & default_salt_chars
if cls.salt_chars:
if not cls.default_salt_chars:
raise AssertionError("default_salt_chars must not be empty")
for c in cls.default_salt_chars:
if c not in cls.salt_chars:
raise AssertionError("default_salt_chars must be subset of salt_chars: %r not in salt_chars" % (c,))
else:
if not cls.default_salt_chars:
raise AssertionError("default_salt_chars MUST be specified if salt_chars is empty")
@property
def salt_bits(self):
"""calculate number of salt bits in hash"""
# XXX: replace this with bitsize() method?
handler = self.handler
assert has_salt_info(handler), "need explicit bit-size for " + handler.name
from math import log
# FIXME: this may be off for case-insensitive hashes, but that accounts
# for ~1 bit difference, which is good enough for test_11()
return int(handler.default_salt_size *
log(len(handler.default_salt_chars), 2))
def test_11_unique_salt(self):
"""test hash() / genconfig() creates new salt each time"""
self.require_salt()
# odds of picking 'n' identical salts at random is '(.5**salt_bits)**n'.
# we want to pick the smallest N needed s.t. odds are <1/10**d, just
# to eliminate false-positives. which works out to n>3.33+d-salt_bits.
# for 1/1e12 odds, n=1 is sufficient for most hashes, but a few border cases (e.g.
# cisco_type7) have < 16 bits of salt, requiring more.
samples = max(1, 4 + 12 - self.salt_bits)
def sampler(func):
value1 = func()
for _ in irange(samples):
value2 = func()
if value1 != value2:
return
raise self.failureException("failed to find different salt after "
"%d samples" % (samples,))
sampler(self.do_genconfig)
sampler(lambda: self.do_encrypt("stub"))
def test_12_min_salt_size(self):
"""test hash() / genconfig() honors min_salt_size"""
self.require_salt_info()
handler = self.handler
salt_char = handler.salt_chars[0:1]
min_size = handler.min_salt_size
#
# check min is accepted
#
s1 = salt_char * min_size
self.do_genconfig(salt=s1)
self.do_encrypt('stub', salt_size=min_size)
#
# check min-1 is rejected
#
if min_size > 0:
self.assertRaises(ValueError, self.do_genconfig,
salt=s1[:-1])
self.assertRaises(ValueError, self.do_encrypt, 'stub',
salt_size=min_size-1)
def test_13_max_salt_size(self):
"""test hash() / genconfig() honors max_salt_size"""
self.require_salt_info()
handler = self.handler
max_size = handler.max_salt_size
salt_char = handler.salt_chars[0:1]
# NOTE: skipping this for hashes like argon2 since max_salt_size takes WAY too much memory
if max_size is None or max_size > (1 << 20):
#
# if it's not set, salt should never be truncated; so test it
# with an unreasonably large salt.
#
s1 = salt_char * 1024
c1 = self.do_stub_encrypt(salt=s1)
c2 = self.do_stub_encrypt(salt=s1 + salt_char)
self.assertNotEqual(c1, c2)
self.do_stub_encrypt(salt_size=1024)
else:
#
# check max size is accepted
#
s1 = salt_char * max_size
c1 = self.do_stub_encrypt(salt=s1)
self.do_stub_encrypt(salt_size=max_size)
#
# check max size + 1 is rejected
#
s2 = s1 + salt_char
self.assertRaises(ValueError, self.do_stub_encrypt, salt=s2)
self.assertRaises(ValueError, self.do_stub_encrypt, salt_size=max_size + 1)
#
# should accept too-large salt in relaxed mode
#
if has_relaxed_setting(handler):
with warnings.catch_warnings(record=True): # issues passlibhandlerwarning
c2 = self.do_stub_encrypt(salt=s2, relaxed=True)
self.assertEqual(c2, c1)
#
# if min_salt supports it, check smaller than mx is NOT truncated
#
if handler.min_salt_size < max_size:
c3 = self.do_stub_encrypt(salt=s1[:-1])
self.assertNotEqual(c3, c1)
# whether salt should be passed through bcrypt repair function
fuzz_salts_need_bcrypt_repair = False
def prepare_salt(self, salt):
"""prepare generated salt"""
if self.fuzz_salts_need_bcrypt_repair:
from passlib.utils.binary import bcrypt64
salt = bcrypt64.repair_unused(salt)
return salt
def test_14_salt_chars(self):
"""test hash() honors salt_chars"""
self.require_salt_info()
handler = self.handler
mx = handler.max_salt_size
mn = handler.min_salt_size
cs = handler.salt_chars
raw = isinstance(cs, bytes)
# make sure all listed chars are accepted
for salt in batch(cs, mx or 32):
if len(salt) < mn:
salt = repeat_string(salt, mn)
salt = self.prepare_salt(salt)
self.do_stub_encrypt(salt=salt)
# check some invalid salt chars, make sure they're rejected
source = u('\x00\xff')
if raw:
source = source.encode("latin-1")
chunk = max(mn, 1)
for c in source:
if c not in cs:
self.assertRaises(ValueError, self.do_stub_encrypt, salt=c*chunk,
__msg__="invalid salt char %r:" % (c,))
@property
def salt_type(self):
"""hack to determine salt keyword's datatype"""
# NOTE: cisco_type7 uses 'int'
if getattr(self.handler, "_salt_is_bytes", False):
return bytes
else:
return unicode
def test_15_salt_type(self):
"""test non-string salt values"""
self.require_salt()
salt_type = self.salt_type
salt_size = getattr(self.handler, "min_salt_size", 0) or 8
# should always throw error for random class.
class fake(object):
pass
self.assertRaises(TypeError, self.do_encrypt, 'stub', salt=fake())
# unicode should be accepted only if salt_type is unicode.
if salt_type is not unicode:
self.assertRaises(TypeError, self.do_encrypt, 'stub', salt=u('x') * salt_size)
# bytes should be accepted only if salt_type is bytes,
# OR if salt type is unicode and running PY2 - to allow native strings.
if not (salt_type is bytes or (PY2 and salt_type is unicode)):
self.assertRaises(TypeError, self.do_encrypt, 'stub', salt=b'x' * salt_size)
def test_using_salt_size(self):
"""Handler.using() -- default_salt_size"""
self.require_salt_info()
handler = self.handler
mn = handler.min_salt_size
mx = handler.max_salt_size
df = handler.default_salt_size
# should prevent setting below handler limit
self.assertRaises(ValueError, handler.using, default_salt_size=-1)
with self.assertWarningList([PasslibHashWarning]):
temp = handler.using(default_salt_size=-1, relaxed=True)
self.assertEqual(temp.default_salt_size, mn)
# should prevent setting above handler limit
if mx:
self.assertRaises(ValueError, handler.using, default_salt_size=mx+1)
with self.assertWarningList([PasslibHashWarning]):
temp = handler.using(default_salt_size=mx+1, relaxed=True)
self.assertEqual(temp.default_salt_size, mx)
# try setting to explicit value
if mn != mx:
temp = handler.using(default_salt_size=mn+1)
self.assertEqual(temp.default_salt_size, mn+1)
self.assertEqual(handler.default_salt_size, df)
temp = handler.using(default_salt_size=mn+2)
self.assertEqual(temp.default_salt_size, mn+2)
self.assertEqual(handler.default_salt_size, df)
# accept strings
if mn == mx:
ref = mn
else:
ref = mn + 1
temp = handler.using(default_salt_size=str(ref))
self.assertEqual(temp.default_salt_size, ref)
# reject invalid strings
self.assertRaises(ValueError, handler.using, default_salt_size=str(ref) + "xxx")
# honor 'salt_size' alias
temp = handler.using(salt_size=ref)
self.assertEqual(temp.default_salt_size, ref)
#===================================================================
# rounds
#===================================================================
def require_rounds_info(self):
if not has_rounds_info(self.handler):
raise self.skipTest("handler lacks rounds attributes")
def test_20_optional_rounds_attributes(self):
"""validate optional rounds attributes"""
self.require_rounds_info()
cls = self.handler
AssertionError = self.failureException
# check max_rounds
if cls.max_rounds is None:
raise AssertionError("max_rounds not specified")
if cls.max_rounds < 1:
raise AssertionError("max_rounds must be >= 1")
# check min_rounds
if cls.min_rounds < 0:
raise AssertionError("min_rounds must be >= 0")
if cls.min_rounds > cls.max_rounds:
raise AssertionError("min_rounds must be <= max_rounds")
# check default_rounds
if cls.default_rounds is not None:
if cls.default_rounds < cls.min_rounds:
raise AssertionError("default_rounds must be >= min_rounds")
if cls.default_rounds > cls.max_rounds:
raise AssertionError("default_rounds must be <= max_rounds")
# check rounds_cost
if cls.rounds_cost not in rounds_cost_values:
raise AssertionError("unknown rounds cost constant: %r" % (cls.rounds_cost,))
def test_21_min_rounds(self):
"""test hash() / genconfig() honors min_rounds"""
self.require_rounds_info()
handler = self.handler
min_rounds = handler.min_rounds
# check min is accepted
self.do_genconfig(rounds=min_rounds)
self.do_encrypt('stub', rounds=min_rounds)
# check min-1 is rejected
self.assertRaises(ValueError, self.do_genconfig, rounds=min_rounds-1)
self.assertRaises(ValueError, self.do_encrypt, 'stub', rounds=min_rounds-1)
# TODO: check relaxed mode clips min-1
def test_21b_max_rounds(self):
"""test hash() / genconfig() honors max_rounds"""
self.require_rounds_info()
handler = self.handler
max_rounds = handler.max_rounds
if max_rounds is not None:
# check max+1 is rejected
self.assertRaises(ValueError, self.do_genconfig, rounds=max_rounds+1)
self.assertRaises(ValueError, self.do_encrypt, 'stub', rounds=max_rounds+1)
# handle max rounds
if max_rounds is None:
self.do_stub_encrypt(rounds=(1 << 31) - 1)
else:
self.do_stub_encrypt(rounds=max_rounds)
# TODO: check relaxed mode clips max+1
#--------------------------------------------------------------------------------------
# HasRounds.using() / .needs_update() -- desired rounds limits
#--------------------------------------------------------------------------------------
def _create_using_rounds_helper(self):
"""
setup test helpers for testing handler.using()'s rounds parameters.
"""
self.require_rounds_info()
handler = self.handler
if handler.name == "bsdi_crypt":
# hack to bypass bsdi-crypt's "odd rounds only" behavior, messes up this test
orig_handler = handler
handler = handler.using()
handler._generate_rounds = classmethod(lambda cls: super(orig_handler, cls)._generate_rounds())
# create some fake values to test with
orig_min_rounds = handler.min_rounds
orig_max_rounds = handler.max_rounds
orig_default_rounds = handler.default_rounds
medium = ((orig_max_rounds or 9999) + orig_min_rounds) // 2
if medium == orig_default_rounds:
medium += 1
small = (orig_min_rounds + medium) // 2
large = ((orig_max_rounds or 9999) + medium) // 2
if handler.name == "bsdi_crypt":
# hack to avoid even numbered rounds
small |= 1
medium |= 1
large |= 1
adj = 2
else:
adj = 1
# create a subclass with small/medium/large as new default desired values
with self.assertWarningList([]):
subcls = handler.using(
min_desired_rounds=small,
max_desired_rounds=large,
default_rounds=medium,
)
# return helpers
return handler, subcls, small, medium, large, adj
def test_has_rounds_using_harness(self):
"""
HasRounds.using() -- sanity check test harness
"""
# setup helpers
self.require_rounds_info()
handler = self.handler
orig_min_rounds = handler.min_rounds
orig_max_rounds = handler.max_rounds
orig_default_rounds = handler.default_rounds
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
# shouldn't affect original handler at all
self.assertEqual(handler.min_rounds, orig_min_rounds)
self.assertEqual(handler.max_rounds, orig_max_rounds)
self.assertEqual(handler.min_desired_rounds, None)
self.assertEqual(handler.max_desired_rounds, None)
self.assertEqual(handler.default_rounds, orig_default_rounds)
# should affect subcls' desired value, but not hard min/max
self.assertEqual(subcls.min_rounds, orig_min_rounds)
self.assertEqual(subcls.max_rounds, orig_max_rounds)
self.assertEqual(subcls.default_rounds, medium)
self.assertEqual(subcls.min_desired_rounds, small)
self.assertEqual(subcls.max_desired_rounds, large)
def test_has_rounds_using_w_min_rounds(self):
"""
HasRounds.using() -- min_rounds / min_desired_rounds
"""
# setup helpers
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
orig_min_rounds = handler.min_rounds
orig_max_rounds = handler.max_rounds
orig_default_rounds = handler.default_rounds
# .using() should clip values below valid minimum, w/ warning
if orig_min_rounds > 0:
self.assertRaises(ValueError, handler.using, min_desired_rounds=orig_min_rounds - adj)
with self.assertWarningList([PasslibHashWarning]):
temp = handler.using(min_desired_rounds=orig_min_rounds - adj, relaxed=True)
self.assertEqual(temp.min_desired_rounds, orig_min_rounds)
# .using() should clip values above valid maximum, w/ warning
if orig_max_rounds:
self.assertRaises(ValueError, handler.using, min_desired_rounds=orig_max_rounds + adj)
with self.assertWarningList([PasslibHashWarning]):
temp = handler.using(min_desired_rounds=orig_max_rounds + adj, relaxed=True)
self.assertEqual(temp.min_desired_rounds, orig_max_rounds)
# .using() should allow values below previous desired minimum, w/o warning
with self.assertWarningList([]):
temp = subcls.using(min_desired_rounds=small - adj)
self.assertEqual(temp.min_desired_rounds, small - adj)
# .using() should allow values w/in previous range
temp = subcls.using(min_desired_rounds=small + 2 * adj)
self.assertEqual(temp.min_desired_rounds, small + 2 * adj)
# .using() should allow values above previous desired maximum, w/o warning
with self.assertWarningList([]):
temp = subcls.using(min_desired_rounds=large + adj)
self.assertEqual(temp.min_desired_rounds, large + adj)
# hash() etc should allow explicit values below desired minimum
# NOTE: formerly issued a warning in passlib 1.6, now just a wrapper for .using()
self.assertEqual(get_effective_rounds(subcls, small + adj), small + adj)
self.assertEqual(get_effective_rounds(subcls, small), small)
with self.assertWarningList([]):
self.assertEqual(get_effective_rounds(subcls, small - adj), small - adj)
# 'min_rounds' should be treated as alias for 'min_desired_rounds'
temp = handler.using(min_rounds=small)
self.assertEqual(temp.min_desired_rounds, small)
# should be able to specify strings
temp = handler.using(min_rounds=str(small))
self.assertEqual(temp.min_desired_rounds, small)
# invalid strings should cause error
self.assertRaises(ValueError, handler.using, min_rounds=str(small) + "xxx")
def test_has_rounds_replace_w_max_rounds(self):
"""
HasRounds.using() -- max_rounds / max_desired_rounds
"""
# setup helpers
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
orig_min_rounds = handler.min_rounds
orig_max_rounds = handler.max_rounds
# .using() should clip values below valid minimum w/ warning
if orig_min_rounds > 0:
self.assertRaises(ValueError, handler.using, max_desired_rounds=orig_min_rounds - adj)
with self.assertWarningList([PasslibHashWarning]):
temp = handler.using(max_desired_rounds=orig_min_rounds - adj, relaxed=True)
self.assertEqual(temp.max_desired_rounds, orig_min_rounds)
# .using() should clip values above valid maximum, w/ warning
if orig_max_rounds:
self.assertRaises(ValueError, handler.using, max_desired_rounds=orig_max_rounds + adj)
with self.assertWarningList([PasslibHashWarning]):
temp = handler.using(max_desired_rounds=orig_max_rounds + adj, relaxed=True)
self.assertEqual(temp.max_desired_rounds, orig_max_rounds)
# .using() should clip values below previous minimum, w/ warning
with self.assertWarningList([PasslibConfigWarning]):
temp = subcls.using(max_desired_rounds=small - adj)
self.assertEqual(temp.max_desired_rounds, small)
# .using() should reject explicit min > max
self.assertRaises(ValueError, subcls.using,
min_desired_rounds=medium+adj,
max_desired_rounds=medium-adj)
# .using() should allow values w/in previous range
temp = subcls.using(min_desired_rounds=large - 2 * adj)
self.assertEqual(temp.min_desired_rounds, large - 2 * adj)
# .using() should allow values above previous desired maximum, w/o warning
with self.assertWarningList([]):
temp = subcls.using(max_desired_rounds=large + adj)
self.assertEqual(temp.max_desired_rounds, large + adj)
# hash() etc should allow explicit values above desired minimum, w/o warning
# NOTE: formerly issued a warning in passlib 1.6, now just a wrapper for .using()
self.assertEqual(get_effective_rounds(subcls, large - adj), large - adj)
self.assertEqual(get_effective_rounds(subcls, large), large)
with self.assertWarningList([]):
self.assertEqual(get_effective_rounds(subcls, large + adj), large + adj)
# 'max_rounds' should be treated as alias for 'max_desired_rounds'
temp = handler.using(max_rounds=large)
self.assertEqual(temp.max_desired_rounds, large)
# should be able to specify strings
temp = handler.using(max_desired_rounds=str(large))
self.assertEqual(temp.max_desired_rounds, large)
# invalid strings should cause error
self.assertRaises(ValueError, handler.using, max_desired_rounds=str(large) + "xxx")
def test_has_rounds_using_w_default_rounds(self):
"""
HasRounds.using() -- default_rounds
"""
# setup helpers
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
orig_max_rounds = handler.max_rounds
# XXX: are there any other cases that need testing?
# implicit default rounds -- increase to min_rounds
temp = subcls.using(min_rounds=medium+adj)
self.assertEqual(temp.default_rounds, medium+adj)
# implicit default rounds -- decrease to max_rounds
temp = subcls.using(max_rounds=medium-adj)
self.assertEqual(temp.default_rounds, medium-adj)
# explicit default rounds below desired minimum
# XXX: make this a warning if min is implicit?
self.assertRaises(ValueError, subcls.using, default_rounds=small-adj)
# explicit default rounds above desired maximum
# XXX: make this a warning if max is implicit?
if orig_max_rounds:
self.assertRaises(ValueError, subcls.using, default_rounds=large+adj)
# hash() etc should implicit default rounds, but get overridden
self.assertEqual(get_effective_rounds(subcls), medium)
self.assertEqual(get_effective_rounds(subcls, medium+adj), medium+adj)
# should be able to specify strings
temp = handler.using(default_rounds=str(medium))
self.assertEqual(temp.default_rounds, medium)
# invalid strings should cause error
self.assertRaises(ValueError, handler.using, default_rounds=str(medium) + "xxx")
def test_has_rounds_using_w_rounds(self):
"""
HasRounds.using() -- rounds
"""
# setup helpers
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
orig_max_rounds = handler.max_rounds
# 'rounds' should be treated as fallback for min, max, and default
temp = subcls.using(rounds=medium+adj)
self.assertEqual(temp.min_desired_rounds, medium+adj)
self.assertEqual(temp.default_rounds, medium+adj)
self.assertEqual(temp.max_desired_rounds, medium+adj)
# 'rounds' should be treated as fallback for min, max, and default
temp = subcls.using(rounds=medium+1, min_rounds=small+adj,
default_rounds=medium, max_rounds=large-adj)
self.assertEqual(temp.min_desired_rounds, small+adj)
self.assertEqual(temp.default_rounds, medium)
self.assertEqual(temp.max_desired_rounds, large-adj)
def test_has_rounds_using_w_vary_rounds_parsing(self):
"""
HasRounds.using() -- vary_rounds parsing
"""
# setup helpers
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
def parse(value):
return subcls.using(vary_rounds=value).vary_rounds
# floats should be preserved
self.assertEqual(parse(0.1), 0.1)
self.assertEqual(parse('0.1'), 0.1)
# 'xx%' should be converted to float
self.assertEqual(parse('10%'), 0.1)
# ints should be preserved
self.assertEqual(parse(1000), 1000)
self.assertEqual(parse('1000'), 1000)
# float bounds should be enforced
self.assertRaises(ValueError, parse, -0.1)
self.assertRaises(ValueError, parse, 1.1)
def test_has_rounds_using_w_vary_rounds_generation(self):
"""
HasRounds.using() -- vary_rounds generation
"""
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
def get_effective_range(cls):
seen = set(get_effective_rounds(cls) for _ in irange(1000))
return min(seen), max(seen)
def assert_rounds_range(vary_rounds, lower, upper):
temp = subcls.using(vary_rounds=vary_rounds)
seen_lower, seen_upper = get_effective_range(temp)
self.assertEqual(seen_lower, lower, "vary_rounds had wrong lower limit:")
self.assertEqual(seen_upper, upper, "vary_rounds had wrong upper limit:")
# test static
assert_rounds_range(0, medium, medium)
assert_rounds_range("0%", medium, medium)
# test absolute
assert_rounds_range(adj, medium - adj, medium + adj)
assert_rounds_range(50, max(small, medium - 50), min(large, medium + 50))
# test relative - should shift over at 50% mark
if handler.rounds_cost == "log2":
# log rounds "50%" variance should only increase/decrease by 1 cost value
assert_rounds_range("1%", medium, medium)
assert_rounds_range("49%", medium, medium)
assert_rounds_range("50%", medium - adj, medium)
else:
# for linear rounds, range is frequently so huge, won't ever see ends.
# so we just check it's within an expected range.
lower, upper = get_effective_range(subcls.using(vary_rounds="50%"))
self.assertGreaterEqual(lower, max(small, medium * 0.5))
self.assertLessEqual(lower, max(small, medium * 0.8))
self.assertGreaterEqual(upper, min(large, medium * 1.2))
self.assertLessEqual(upper, min(large, medium * 1.5))
def test_has_rounds_using_and_needs_update(self):
"""
HasRounds.using() -- desired_rounds + needs_update()
"""
handler, subcls, small, medium, large, adj = self._create_using_rounds_helper()
temp = subcls.using(min_desired_rounds=small+2, max_desired_rounds=large-2)
# generate some sample hashes
small_hash = self.do_stub_encrypt(subcls, rounds=small)
medium_hash = self.do_stub_encrypt(subcls, rounds=medium)
large_hash = self.do_stub_encrypt(subcls, rounds=large)
# everything should be w/in bounds for original handler
self.assertFalse(subcls.needs_update(small_hash))
self.assertFalse(subcls.needs_update(medium_hash))
self.assertFalse(subcls.needs_update(large_hash))
# small & large should require update for temp handler
self.assertTrue(temp.needs_update(small_hash))
self.assertFalse(temp.needs_update(medium_hash))
self.assertTrue(temp.needs_update(large_hash))
#===================================================================
# idents
#===================================================================
def require_many_idents(self):
handler = self.handler
if not isinstance(handler, type) or not issubclass(handler, uh.HasManyIdents):
raise self.skipTest("handler doesn't derive from HasManyIdents")
def test_30_HasManyIdents(self):
"""validate HasManyIdents configuration"""
cls = self.handler
self.require_many_idents()
# check settings
self.assertTrue('ident' in cls.setting_kwds)
# check ident_values list
for value in cls.ident_values:
self.assertIsInstance(value, unicode,
"cls.ident_values must be unicode:")
self.assertTrue(len(cls.ident_values)>1,
"cls.ident_values must have 2+ elements:")
# check default_ident value
self.assertIsInstance(cls.default_ident, unicode,
"cls.default_ident must be unicode:")
self.assertTrue(cls.default_ident in cls.ident_values,
"cls.default_ident must specify member of cls.ident_values")
# check optional aliases list
if cls.ident_aliases:
for alias, ident in iteritems(cls.ident_aliases):
self.assertIsInstance(alias, unicode,
"cls.ident_aliases keys must be unicode:") # XXX: allow ints?
self.assertIsInstance(ident, unicode,
"cls.ident_aliases values must be unicode:")
self.assertTrue(ident in cls.ident_values,
"cls.ident_aliases must map to cls.ident_values members: %r" % (ident,))
# check constructor validates ident correctly.
handler = cls
hash = self.get_sample_hash()[1]
kwds = handler.parsehash(hash)
del kwds['ident']
# ... accepts good ident
handler(ident=cls.default_ident, **kwds)
# ... requires ident w/o defaults
self.assertRaises(TypeError, handler, **kwds)
# ... supplies default ident
handler(use_defaults=True, **kwds)
# ... rejects bad ident
self.assertRaises(ValueError, handler, ident='xXx', **kwds)
# TODO: check various supported idents
def test_has_many_idents_using(self):
"""HasManyIdents.using() -- 'default_ident' and 'ident' keywords"""
self.require_many_idents()
# pick alt ident to test with
handler = self.handler
orig_ident = handler.default_ident
for alt_ident in handler.ident_values:
if alt_ident != orig_ident:
break
else:
raise AssertionError("expected to find alternate ident: default=%r values=%r" %
(orig_ident, handler.ident_values))
def effective_ident(cls):
cls = unwrap_handler(cls)
return cls(use_defaults=True).ident
# keep default if nothing else specified
subcls = handler.using()
self.assertEqual(subcls.default_ident, orig_ident)
# accepts alt ident
subcls = handler.using(default_ident=alt_ident)
self.assertEqual(subcls.default_ident, alt_ident)
self.assertEqual(handler.default_ident, orig_ident)
# check subcls actually *generates* default ident,
# and that we didn't affect orig handler
self.assertEqual(effective_ident(subcls), alt_ident)
self.assertEqual(effective_ident(handler), orig_ident)
# rejects bad ident
self.assertRaises(ValueError, handler.using, default_ident='xXx')
# honor 'ident' alias
subcls = handler.using(ident=alt_ident)
self.assertEqual(subcls.default_ident, alt_ident)
self.assertEqual(handler.default_ident, orig_ident)
# forbid both at same time
self.assertRaises(TypeError, handler.using, default_ident=alt_ident, ident=alt_ident)
# check ident aliases are being honored
if handler.ident_aliases:
for alias, ident in handler.ident_aliases.items():
subcls = handler.using(ident=alias)
self.assertEqual(subcls.default_ident, ident, msg="alias %r:" % alias)
#===================================================================
# password size limits
#===================================================================
def test_truncate_error_setting(self):
"""
validate 'truncate_error' setting & related attributes
"""
# If it doesn't have truncate_size set,
# it shouldn't support truncate_error
hasher = self.handler
if hasher.truncate_size is None:
self.assertNotIn("truncate_error", hasher.setting_kwds)
return
# if hasher defaults to silently truncating,
# it MUST NOT use .truncate_verify_reject,
# because resulting hashes wouldn't verify!
if not hasher.truncate_error:
self.assertFalse(hasher.truncate_verify_reject)
# if hasher doesn't have configurable policy,
# it must throw error by default
if "truncate_error" not in hasher.setting_kwds:
self.assertTrue(hasher.truncate_error)
return
# test value parsing
def parse_value(value):
return hasher.using(truncate_error=value).truncate_error
self.assertEqual(parse_value(None), hasher.truncate_error)
self.assertEqual(parse_value(True), True)
self.assertEqual(parse_value("true"), True)
self.assertEqual(parse_value(False), False)
self.assertEqual(parse_value("false"), False)
self.assertRaises(ValueError, parse_value, "xxx")
def test_secret_wo_truncate_size(self):
"""
test no password size limits enforced (if truncate_size=None)
"""
# skip if hasher has a maximum password size
hasher = self.handler
if hasher.truncate_size is not None:
self.assertGreaterEqual(hasher.truncate_size, 1)
raise self.skipTest("truncate_size is set")
# NOTE: this doesn't do an exhaustive search to verify algorithm
# doesn't have some cutoff point, it just tries
# 1024-character string, and alters the last char.
# as long as algorithm doesn't clip secret at point <1024,
# the new secret shouldn't verify.
# hash a 1024-byte secret
secret = "too many secrets" * 16
alt = "x"
hash = self.do_encrypt(secret)
# check that verify doesn't silently reject secret
# (i.e. hasher mistakenly honors .truncate_verify_reject)
verify_success = not hasher.is_disabled
self.assertEqual(self.do_verify(secret, hash), verify_success,
msg="verify rejected correct secret")
# alter last byte, should get different hash, which won't verify
alt_secret = secret[:-1] + alt
self.assertFalse(self.do_verify(alt_secret, hash),
"full password not used in digest")
def test_secret_w_truncate_size(self):
"""
test password size limits raise truncate_error (if appropriate)
"""
#--------------------------------------------------
# check if test is applicable
#--------------------------------------------------
handler = self.handler
truncate_size = handler.truncate_size
if not truncate_size:
raise self.skipTest("truncate_size not set")
#--------------------------------------------------
# setup vars
#--------------------------------------------------
# try to get versions w/ and w/o truncate_error set.
# set to None if policy isn't configruable
size_error_type = exc.PasswordSizeError
if "truncate_error" in handler.setting_kwds:
without_error = handler.using(truncate_error=False)
with_error = handler.using(truncate_error=True)
size_error_type = exc.PasswordTruncateError
elif handler.truncate_error:
without_error = None
with_error = handler
else:
# NOTE: this mode is currently an error in test_truncate_error_setting()
without_error = handler
with_error = None
# create some test secrets
base = "too many secrets"
alt = "x" # char that's not in base, used to mutate test secrets
long_secret = repeat_string(base, truncate_size+1)
short_secret = long_secret[:-1]
alt_long_secret = long_secret[:-1] + alt
alt_short_secret = short_secret[:-1] + alt
# init flags
short_verify_success = not handler.is_disabled
long_verify_success = short_verify_success and \
not handler.truncate_verify_reject
#--------------------------------------------------
# do tests on <truncate_size> length secret, and resulting hash.
# should pass regardless of truncate_error policy.
#--------------------------------------------------
assert without_error or with_error
for cand_hasher in [without_error, with_error]:
# create & hash string that's exactly <truncate_size> chars.
short_hash = self.do_encrypt(short_secret, handler=cand_hasher)
# check hash verifies, regardless of .truncate_verify_reject
self.assertEqual(self.do_verify(short_secret, short_hash,
handler=cand_hasher),
short_verify_success)
# changing <truncate_size-1>'th char should invalidate hash
# if this fails, means (reported) truncate_size is too large.
self.assertFalse(self.do_verify(alt_short_secret, short_hash,
handler=with_error),
"truncate_size value is too large")
# verify should truncate long secret before comparing
# (unless truncate_verify_reject is set)
self.assertEqual(self.do_verify(long_secret, short_hash,
handler=cand_hasher),
long_verify_success)
#--------------------------------------------------
# do tests on <truncate_size+1> length secret,
# w/ truncate error disabled (should silently truncate)
#--------------------------------------------------
if without_error:
# create & hash string that's exactly truncate_size+1 chars
long_hash = self.do_encrypt(long_secret, handler=without_error)
# check verifies against secret (unless truncate_verify_reject=True)
self.assertEqual(self.do_verify(long_secret, long_hash,
handler=without_error),
short_verify_success)
# check mutating last char doesn't change outcome.
# if this fails, means (reported) truncate_size is too small.
self.assertEqual(self.do_verify(alt_long_secret, long_hash,
handler=without_error),
short_verify_success)
# check short_secret verifies against this hash
# if this fails, means (reported) truncate_size is too large.
self.assertTrue(self.do_verify(short_secret, long_hash,
handler=without_error))
#--------------------------------------------------
# do tests on <truncate_size+1> length secret,
# w/ truncate error
#--------------------------------------------------
if with_error:
# with errors enabled, should forbid truncation.
err = self.assertRaises(size_error_type, self.do_encrypt,
long_secret, handler=with_error)
self.assertEqual(err.max_size, truncate_size)
#===================================================================
# password contents
#===================================================================
def test_61_secret_case_sensitive(self):
"""test password case sensitivity"""
hash_insensitive = self.secret_case_insensitive is True
verify_insensitive = self.secret_case_insensitive in [True,
"verify-only"]
# test hashing lower-case verifies against lower & upper
lower = 'test'
upper = 'TEST'
h1 = self.do_encrypt(lower)
if verify_insensitive and not self.handler.is_disabled:
self.assertTrue(self.do_verify(upper, h1),
"verify() should not be case sensitive")
else:
self.assertFalse(self.do_verify(upper, h1),
"verify() should be case sensitive")
# test hashing upper-case verifies against lower & upper
h2 = self.do_encrypt(upper)
if verify_insensitive and not self.handler.is_disabled:
self.assertTrue(self.do_verify(lower, h2),
"verify() should not be case sensitive")
else:
self.assertFalse(self.do_verify(lower, h2),
"verify() should be case sensitive")
# test genhash
# XXX: 2.0: what about 'verify-only' hashes once genhash() is removed?
# won't have easy way to recreate w/ same config to see if hash differs.
# (though only hash this applies to is mssql2000)
h2 = self.do_genhash(upper, h1)
if hash_insensitive or (self.handler.is_disabled and not self.disabled_contains_salt):
self.assertEqual(h2, h1,
"genhash() should not be case sensitive")
else:
self.assertNotEqual(h2, h1,
"genhash() should be case sensitive")
def test_62_secret_border(self):
"""test non-string passwords are rejected"""
hash = self.get_sample_hash()[1]
# secret=None
self.assertRaises(TypeError, self.do_encrypt, None)
self.assertRaises(TypeError, self.do_genhash, None, hash)
self.assertRaises(TypeError, self.do_verify, None, hash)
# secret=int (picked as example of entirely wrong class)
self.assertRaises(TypeError, self.do_encrypt, 1)
self.assertRaises(TypeError, self.do_genhash, 1, hash)
self.assertRaises(TypeError, self.do_verify, 1, hash)
# xxx: move to password size limits section, above?
def test_63_large_secret(self):
"""test MAX_PASSWORD_SIZE is enforced"""
from passlib.exc import PasswordSizeError
from passlib.utils import MAX_PASSWORD_SIZE
secret = '.' * (1+MAX_PASSWORD_SIZE)
hash = self.get_sample_hash()[1]
err = self.assertRaises(PasswordSizeError, self.do_genhash, secret, hash)
self.assertEqual(err.max_size, MAX_PASSWORD_SIZE)
self.assertRaises(PasswordSizeError, self.do_encrypt, secret)
self.assertRaises(PasswordSizeError, self.do_verify, secret, hash)
def test_64_forbidden_chars(self):
"""test forbidden characters not allowed in password"""
chars = self.forbidden_characters
if not chars:
raise self.skipTest("none listed")
base = u('stub')
if isinstance(chars, bytes):
from passlib.utils.compat import iter_byte_chars
chars = iter_byte_chars(chars)
base = base.encode("ascii")
for c in chars:
self.assertRaises(ValueError, self.do_encrypt, base + c + base)
#===================================================================
# check identify(), verify(), genhash() against test vectors
#===================================================================
def is_secret_8bit(self, secret):
secret = self.populate_context(secret, {})
return not is_ascii_safe(secret)
def expect_os_crypt_failure(self, secret):
"""
check if we're expecting potential verify failure due to crypt.crypt() encoding limitation
"""
if PY3 and self.backend == "os_crypt" and isinstance(secret, bytes):
try:
secret.decode("utf-8")
except UnicodeDecodeError:
return True
return False
def test_70_hashes(self):
"""test known hashes"""
# sanity check
self.assertTrue(self.known_correct_hashes or self.known_correct_configs,
"test must set at least one of 'known_correct_hashes' "
"or 'known_correct_configs'")
# run through known secret/hash pairs
saw8bit = False
for secret, hash in self.iter_known_hashes():
if self.is_secret_8bit(secret):
saw8bit = True
# hash should be positively identified by handler
self.assertTrue(self.do_identify(hash),
"identify() failed to identify hash: %r" % (hash,))
# check if what we're about to do is expected to fail due to crypt.crypt() limitation.
expect_os_crypt_failure = self.expect_os_crypt_failure(secret)
try:
# secret should verify successfully against hash
self.check_verify(secret, hash, "verify() of known hash failed: "
"secret=%r, hash=%r" % (secret, hash))
# genhash() should reproduce same hash
result = self.do_genhash(secret, hash)
self.assertIsInstance(result, str,
"genhash() failed to return native string: %r" % (result,))
if self.handler.is_disabled and self.disabled_contains_salt:
continue
self.assertEqual(result, hash, "genhash() failed to reproduce "
"known hash: secret=%r, hash=%r: result=%r" %
(secret, hash, result))
except MissingBackendError:
if not expect_os_crypt_failure:
raise
# would really like all handlers to have at least one 8-bit test vector
if not saw8bit:
warn("%s: no 8-bit secrets tested" % self.__class__)
def test_71_alternates(self):
"""test known alternate hashes"""
if not self.known_alternate_hashes:
raise self.skipTest("no alternate hashes provided")
for alt, secret, hash in self.known_alternate_hashes:
# hash should be positively identified by handler
self.assertTrue(self.do_identify(hash),
"identify() failed to identify alternate hash: %r" %
(hash,))
# secret should verify successfully against hash
self.check_verify(secret, alt, "verify() of known alternate hash "
"failed: secret=%r, hash=%r" % (secret, alt))
# genhash() should reproduce canonical hash
result = self.do_genhash(secret, alt)
self.assertIsInstance(result, str,
"genhash() failed to return native string: %r" % (result,))
if self.handler.is_disabled and self.disabled_contains_salt:
continue
self.assertEqual(result, hash, "genhash() failed to normalize "
"known alternate hash: secret=%r, alt=%r, hash=%r: "
"result=%r" % (secret, alt, hash, result))
def test_72_configs(self):
"""test known config strings"""
# special-case handlers without settings
if not self.handler.setting_kwds:
self.assertFalse(self.known_correct_configs,
"handler should not have config strings")
raise self.skipTest("hash has no settings")
if not self.known_correct_configs:
# XXX: make this a requirement?
raise self.skipTest("no config strings provided")
# make sure config strings work (hashes in list tested in test_70)
if self.filter_config_warnings:
warnings.filterwarnings("ignore", category=PasslibHashWarning)
for config, secret, hash in self.known_correct_configs:
# config should be positively identified by handler
self.assertTrue(self.do_identify(config),
"identify() failed to identify known config string: %r" %
(config,))
# verify() should throw error for config strings.
self.assertRaises(ValueError, self.do_verify, secret, config,
__msg__="verify() failed to reject config string: %r" %
(config,))
# genhash() should reproduce hash from config.
result = self.do_genhash(secret, config)
self.assertIsInstance(result, str,
"genhash() failed to return native string: %r" % (result,))
self.assertEqual(result, hash, "genhash() failed to reproduce "
"known hash from config: secret=%r, config=%r, hash=%r: "
"result=%r" % (secret, config, hash, result))
def test_73_unidentified(self):
"""test known unidentifiably-mangled strings"""
if not self.known_unidentified_hashes:
raise self.skipTest("no unidentified hashes provided")
for hash in self.known_unidentified_hashes:
# identify() should reject these
self.assertFalse(self.do_identify(hash),
"identify() incorrectly identified known unidentifiable "
"hash: %r" % (hash,))
# verify() should throw error
self.assertRaises(ValueError, self.do_verify, 'stub', hash,
__msg__= "verify() failed to throw error for unidentifiable "
"hash: %r" % (hash,))
# genhash() should throw error
self.assertRaises(ValueError, self.do_genhash, 'stub', hash,
__msg__= "genhash() failed to throw error for unidentifiable "
"hash: %r" % (hash,))
def test_74_malformed(self):
"""test known identifiable-but-malformed strings"""
if not self.known_malformed_hashes:
raise self.skipTest("no malformed hashes provided")
for hash in self.known_malformed_hashes:
# identify() should accept these
self.assertTrue(self.do_identify(hash),
"identify() failed to identify known malformed "
"hash: %r" % (hash,))
# verify() should throw error
self.assertRaises(ValueError, self.do_verify, 'stub', hash,
__msg__= "verify() failed to throw error for malformed "
"hash: %r" % (hash,))
# genhash() should throw error
self.assertRaises(ValueError, self.do_genhash, 'stub', hash,
__msg__= "genhash() failed to throw error for malformed "
"hash: %r" % (hash,))
def test_75_foreign(self):
"""test known foreign hashes"""
if self.accepts_all_hashes:
raise self.skipTest("not applicable")
if not self.known_other_hashes:
raise self.skipTest("no foreign hashes provided")
for name, hash in self.known_other_hashes:
# NOTE: most tests use default list of foreign hashes,
# so they may include ones belonging to that hash...
# hence the 'own' logic.
if name == self.handler.name:
# identify should accept these
self.assertTrue(self.do_identify(hash),
"identify() failed to identify known hash: %r" % (hash,))
# verify & genhash should NOT throw error
self.do_verify('stub', hash)
result = self.do_genhash('stub', hash)
self.assertIsInstance(result, str,
"genhash() failed to return native string: %r" % (result,))
else:
# identify should reject these
self.assertFalse(self.do_identify(hash),
"identify() incorrectly identified hash belonging to "
"%s: %r" % (name, hash))
# verify should throw error
self.assertRaises(ValueError, self.do_verify, 'stub', hash,
__msg__= "verify() failed to throw error for hash "
"belonging to %s: %r" % (name, hash,))
# genhash() should throw error
self.assertRaises(ValueError, self.do_genhash, 'stub', hash,
__msg__= "genhash() failed to throw error for hash "
"belonging to %s: %r" % (name, hash))
def test_76_hash_border(self):
"""test non-string hashes are rejected"""
#
# test hash=None is handled correctly
#
self.assertRaises(TypeError, self.do_identify, None)
self.assertRaises(TypeError, self.do_verify, 'stub', None)
# NOTE: changed in 1.7 -- previously 'None' would be accepted when config strings not supported.
self.assertRaises(TypeError, self.do_genhash, 'stub', None)
#
# test hash=int is rejected (picked as example of entirely wrong type)
#
self.assertRaises(TypeError, self.do_identify, 1)
self.assertRaises(TypeError, self.do_verify, 'stub', 1)
self.assertRaises(TypeError, self.do_genhash, 'stub', 1)
#
# test hash='' is rejected for all but the plaintext hashes
#
for hash in [u(''), b'']:
if self.accepts_all_hashes:
# then it accepts empty string as well.
self.assertTrue(self.do_identify(hash))
self.do_verify('stub', hash)
result = self.do_genhash('stub', hash)
self.check_returned_native_str(result, "genhash")
else:
# otherwise it should reject them
self.assertFalse(self.do_identify(hash),
"identify() incorrectly identified empty hash")
self.assertRaises(ValueError, self.do_verify, 'stub', hash,
__msg__="verify() failed to reject empty hash")
self.assertRaises(ValueError, self.do_genhash, 'stub', hash,
__msg__="genhash() failed to reject empty hash")
#
# test identify doesn't throw decoding errors on 8-bit input
#
self.do_identify('\xe2\x82\xac\xc2\xa5$') # utf-8
self.do_identify('abc\x91\x00') # non-utf8
#===================================================================
# test parsehash()
#===================================================================
#: optional list of known parse hash results for hasher
known_parsehash_results = []
def require_parsehash(self):
if not hasattr(self.handler, "parsehash"):
raise SkipTest("parsehash() not implemented")
def test_70_parsehash(self):
"""
parsehash()
"""
# TODO: would like to enhance what this test covers
self.require_parsehash()
handler = self.handler
# calls should succeed, and return dict
hash = self.do_encrypt("stub")
result = handler.parsehash(hash)
self.assertIsInstance(result, dict)
# TODO: figure out what invariants we can reliably parse,
# or maybe make subclasses specify that?
# w/ checksum=False, should omit that key
result2 = handler.parsehash(hash, checksum=False)
correct2 = result.copy()
correct2.pop("checksum", None)
self.assertEqual(result2, correct2)
# w/ sanitize=True
# correct output should mask salt / checksum;
# but all else should be the same
result3 = handler.parsehash(hash, sanitize=True)
correct3 = result.copy()
if PY2:
# silence warning about bytes & unicode not comparing
# (sanitize may convert bytes into base64 text)
warnings.filterwarnings("ignore", ".*unequal comparison failed to convert.*",
category=UnicodeWarning)
for key in ("salt", "checksum"):
if key in result3:
self.assertNotEqual(result3[key], correct3[key])
self.assert_is_masked(result3[key])
correct3[key] = result3[key]
self.assertEqual(result3, correct3)
def assert_is_masked(self, value):
"""
check value properly masked by :func:`passlib.utils.mask_value`
"""
if value is None:
return
self.assertIsInstance(value, unicode)
# assumes mask_value() defaults will never show more than <show> chars (4);
# and show nothing if size less than 1/<pct> (8).
ref = value if len(value) < 8 else value[4:]
if set(ref) == set(["*"]):
return True
raise self.fail("value not masked: %r" % value)
def test_71_parsehash_results(self):
"""
parsehash() -- known outputs
"""
self.require_parsehash()
samples = self.known_parsehash_results
if not samples:
raise self.skipTest("no samples present")
# XXX: expand to test w/ checksum=False and/or sanitize=True?
# or read "_unsafe_settings"?
for hash, correct in self.known_parsehash_results:
result = self.handler.parsehash(hash)
self.assertEqual(result, correct, "hash=%r:" % hash)
#===================================================================
# fuzz testing
#===================================================================
def test_77_fuzz_input(self, threaded=False):
"""fuzz testing -- random passwords and options
This test attempts to perform some basic fuzz testing of the hash,
based on whatever information can be found about it.
It does as much as it can within a fixed amount of time
(defaults to 1 second, but can be overridden via $PASSLIB_TEST_FUZZ_TIME).
It tests the following:
* randomly generated passwords including extended unicode chars
* randomly selected rounds values (if rounds supported)
* randomly selected salt sizes (if salts supported)
* randomly selected identifiers (if multiple found)
* runs output of selected backend against other available backends
(if any) to detect errors occurring between different backends.
* runs output against other "external" verifiers such as OS crypt()
:param report_thread_state:
if true, writes state of loop to current_thread().passlib_fuzz_state.
used to help debug multi-threaded fuzz test issues (below)
"""
if self.handler.is_disabled:
raise self.skipTest("not applicable")
# gather info
from passlib.utils import tick
max_time = self.max_fuzz_time
if max_time <= 0:
raise self.skipTest("disabled by test mode")
verifiers = self.get_fuzz_verifiers(threaded=threaded)
def vname(v):
return (v.__doc__ or v.__name__).splitlines()[0]
# init rng -- using separate one for each thread
# so things are predictable for given RANDOM_TEST_SEED
# (relies on test_78_fuzz_threading() to give threads unique names)
if threaded:
thread_name = threading.current_thread().name
else:
thread_name = "fuzz test"
rng = self.getRandom(name=thread_name)
generator = self.FuzzHashGenerator(self, rng)
# do as many tests as possible for max_time seconds
log.debug("%s: %s: started; max_time=%r verifiers=%d (%s)",
self.descriptionPrefix, thread_name, max_time, len(verifiers),
", ".join(vname(v) for v in verifiers))
start = tick()
stop = start + max_time
count = 0
while tick() <= stop:
# generate random password & options
opts = generator.generate()
secret = opts['secret']
other = opts['other']
settings = opts['settings']
ctx = opts['context']
if ctx:
settings['context'] = ctx
# create new hash
hash = self.do_encrypt(secret, **settings)
##log.debug("fuzz test: hash=%r secret=%r other=%r",
## hash, secret, other)
# run through all verifiers we found.
for verify in verifiers:
name = vname(verify)
result = verify(secret, hash, **ctx)
if result == "skip": # let verifiers signal lack of support
continue
assert result is True or result is False
if not result:
raise self.failureException("failed to verify against %r verifier: "
"secret=%r config=%r hash=%r" %
(name, secret, settings, hash))
# occasionally check that some other secrets WON'T verify
# against this hash.
if rng.random() < .1:
result = verify(other, hash, **ctx)
if result and result != "skip":
raise self.failureException("was able to verify wrong "
"password using %s: wrong_secret=%r real_secret=%r "
"config=%r hash=%r" % (name, other, secret, settings, hash))
count += 1
log.debug("%s: %s: done; elapsed=%r count=%r",
self.descriptionPrefix, thread_name, tick() - start, count)
def test_78_fuzz_threading(self):
"""multithreaded fuzz testing -- random password & options using multiple threads
run test_77 simultaneously in multiple threads
in an attempt to detect any concurrency issues
(e.g. the bug fixed by pybcrypt 0.3)
"""
self.require_TEST_MODE("full")
import threading
# check if this test should run
if self.handler.is_disabled:
raise self.skipTest("not applicable")
thread_count = self.fuzz_thread_count
if thread_count < 1 or self.max_fuzz_time <= 0:
raise self.skipTest("disabled by test mode")
# buffer to hold errors thrown by threads
failed_lock = threading.Lock()
failed = [0]
# launch <thread count> threads, all of which run
# test_77_fuzz_input(), and see if any errors get thrown.
# if hash has concurrency issues, this should reveal it.
def wrapper():
try:
self.test_77_fuzz_input(threaded=True)
except SkipTest:
pass
except:
with failed_lock:
failed[0] += 1
raise
def launch(n):
cls = type(self)
name = "Fuzz-Thread-%d ('%s:%s.%s')" % (n, cls.__module__, cls.__name__,
self._testMethodName)
thread = threading.Thread(target=wrapper, name=name)
thread.setDaemon(True)
thread.start()
return thread
threads = [launch(n) for n in irange(thread_count)]
# wait until all threads exit
timeout = self.max_fuzz_time * thread_count * 4
stalled = 0
for thread in threads:
thread.join(timeout)
if not thread.is_alive():
continue
# XXX: not sure why this is happening, main one seems 1/4 times for sun_md5_crypt
log.error("%s timed out after %f seconds", thread.name, timeout)
stalled += 1
# if any thread threw an error, raise one ourselves.
if failed[0]:
raise self.fail("%d/%d threads failed concurrent fuzz testing "
"(see error log for details)" % (failed[0], thread_count))
if stalled:
raise self.fail("%d/%d threads stalled during concurrent fuzz testing "
"(see error log for details)" % (stalled, thread_count))
#---------------------------------------------------------------
# fuzz constants & helpers
#---------------------------------------------------------------
@property
def max_fuzz_time(self):
"""amount of time to spend on fuzz testing"""
value = float(os.environ.get("PASSLIB_TEST_FUZZ_TIME") or 0)
if value:
return value
elif TEST_MODE(max="quick"):
return 0
elif TEST_MODE(max="default"):
return 1
else:
return 5
@property
def fuzz_thread_count(self):
"""number of threads for threaded fuzz testing"""
value = int(os.environ.get("PASSLIB_TEST_FUZZ_THREADS") or 0)
if value:
return value
elif TEST_MODE(max="quick"):
return 0
else:
return 10
#---------------------------------------------------------------
# fuzz verifiers
#---------------------------------------------------------------
#: list of custom fuzz-test verifiers (in addition to hasher itself,
#: and backend-specific wrappers of hasher). each element is
#: name of method that will return None / a verifier callable.
fuzz_verifiers = ("fuzz_verifier_default",)
def get_fuzz_verifiers(self, threaded=False):
"""return list of password verifiers (including external libs)
used by fuzz testing.
verifiers should be callable with signature
``func(password: unicode, hash: ascii str) -> ok: bool``.
"""
handler = self.handler
verifiers = []
# call all methods starting with prefix in order to create
for method_name in self.fuzz_verifiers:
func = getattr(self, method_name)()
if func is not None:
verifiers.append(func)
# create verifiers for any other available backends
# NOTE: skipping this under threading test,
# since backend switching isn't threadsafe (yet)
if hasattr(handler, "backends") and TEST_MODE("full") and not threaded:
def maker(backend):
def func(secret, hash):
orig_backend = handler.get_backend()
try:
handler.set_backend(backend)
return handler.verify(secret, hash)
finally:
handler.set_backend(orig_backend)
func.__name__ = "check_" + backend + "_backend"
func.__doc__ = backend + "-backend"
return func
for backend in iter_alt_backends(handler):
verifiers.append(maker(backend))
return verifiers
def fuzz_verifier_default(self):
# test against self
def check_default(secret, hash, **ctx):
return self.do_verify(secret, hash, **ctx)
if self.backend:
check_default.__doc__ = self.backend + "-backend"
else:
check_default.__doc__ = "self"
return check_default
#---------------------------------------------------------------
# fuzz settings generation
#---------------------------------------------------------------
class FuzzHashGenerator(object):
"""
helper which takes care of generating random
passwords & configuration options to test hash with.
separate from test class so we can create one per thread.
"""
#==========================================================
# class attrs
#==========================================================
# alphabet for randomly generated passwords
password_alphabet = u('qwertyASDF1234<>.@*#! \u00E1\u0259\u0411\u2113')
# encoding when testing bytes
password_encoding = "utf-8"
# map of setting kwd -> method name.
# will ignore setting if method returns None.
# subclasses should make copy of dict.
settings_map = dict(rounds="random_rounds",
salt_size="random_salt_size",
ident="random_ident")
# map of context kwd -> method name.
context_map = {}
#==========================================================
# init / generation
#==========================================================
def __init__(self, test, rng):
self.test = test
self.handler = test.handler
self.rng = rng
def generate(self):
"""
generate random password and options for fuzz testing.
:returns:
`(secret, other_secret, settings_kwds, context_kwds)`
"""
def gendict(map):
out = {}
for key, meth in map.items():
value = getattr(self, meth)()
if value is not None:
out[key] = value
return out
secret, other = self.random_password_pair()
return dict(secret=secret,
other=other,
settings=gendict(self.settings_map),
context=gendict(self.context_map),
)
#==========================================================
# helpers
#==========================================================
def randintgauss(self, lower, upper, mu, sigma):
"""generate random int w/ gauss distirbution"""
value = self.rng.normalvariate(mu, sigma)
return int(limit(value, lower, upper))
#==========================================================
# settings generation
#==========================================================
def random_rounds(self):
handler = self.handler
if not has_rounds_info(handler):
return None
default = handler.default_rounds or handler.min_rounds
lower = handler.min_rounds
if handler.rounds_cost == "log2":
upper = default
else:
upper = min(default*2, handler.max_rounds)
return self.randintgauss(lower, upper, default, default*.5)
def random_salt_size(self):
handler = self.handler
if not (has_salt_info(handler) and 'salt_size' in handler.setting_kwds):
return None
default = handler.default_salt_size
lower = handler.min_salt_size
upper = handler.max_salt_size or default*4
return self.randintgauss(lower, upper, default, default*.5)
def random_ident(self):
rng = self.rng
handler = self.handler
if 'ident' not in handler.setting_kwds or not hasattr(handler, "ident_values"):
return None
if rng.random() < .5:
return None
# resolve wrappers before reading values
handler = getattr(handler, "wrapped", handler)
return rng.choice(handler.ident_values)
#==========================================================
# fuzz password generation
#==========================================================
def random_password_pair(self):
"""generate random password, and non-matching alternate password"""
secret = self.random_password()
while True:
other = self.random_password()
if self.accept_password_pair(secret, other):
break
rng = self.rng
if rng.randint(0,1):
secret = secret.encode(self.password_encoding)
if rng.randint(0,1):
other = other.encode(self.password_encoding)
return secret, other
def random_password(self):
"""generate random passwords for fuzz testing"""
# occasionally try an empty password
rng = self.rng
if rng.random() < .0001:
return u('')
# check if truncate size needs to be considered
handler = self.handler
truncate_size = handler.truncate_error and handler.truncate_size
max_size = truncate_size or 999999
# pick endpoint
if max_size < 50 or rng.random() < .5:
# chance of small password (~15 chars)
size = self.randintgauss(1, min(max_size, 50), 15, 15)
else:
# otherwise large password (~70 chars)
size = self.randintgauss(50, min(max_size, 99), 70, 20)
# generate random password
result = getrandstr(rng, self.password_alphabet, size)
# trim ones that encode past truncate point.
if truncate_size and isinstance(result, unicode):
while len(result.encode("utf-8")) > truncate_size:
result = result[:-1]
return result
def accept_password_pair(self, secret, other):
"""verify fuzz pair contains different passwords"""
return secret != other
#==========================================================
# eoc FuzzGenerator
#==========================================================
#===================================================================
# "disabled hasher" api
#===================================================================
def test_disable_and_enable(self):
""".disable() / .enable() methods"""
#
# setup
#
handler = self.handler
if not handler.is_disabled:
self.assertFalse(hasattr(handler, "disable"))
self.assertFalse(hasattr(handler, "enable"))
self.assertFalse(self.disabled_contains_salt)
raise self.skipTest("not applicable")
#
# disable()
#
# w/o existing hash
disabled_default = handler.disable()
self.assertIsInstance(disabled_default, str,
msg="disable() must return native string")
self.assertTrue(handler.identify(disabled_default),
msg="identify() didn't recognize disable() result: %r" % (disabled_default))
# w/ existing hash
stub = self.getRandom().choice(self.known_other_hashes)[1]
disabled_stub = handler.disable(stub)
self.assertIsInstance(disabled_stub, str,
msg="disable() must return native string")
self.assertTrue(handler.identify(disabled_stub),
msg="identify() didn't recognize disable() result: %r" % (disabled_stub))
#
# enable()
#
# w/o original hash
self.assertRaisesRegex(ValueError, "cannot restore original hash",
handler.enable, disabled_default)
# w/ original hash
try:
result = handler.enable(disabled_stub)
error = None
except ValueError as e:
result = None
error = e
if error is None:
# if supports recovery, should have returned stub (e.g. unix_disabled);
self.assertIsInstance(result, str,
msg="enable() must return native string")
self.assertEqual(result, stub)
else:
# if doesn't, should have thrown appropriate error
self.assertIsInstance(error, ValueError)
self.assertRegex("cannot restore original hash", str(error))
#
# test repeating disable() & salting state
#
# repeating disabled
disabled_default2 = handler.disable()
if self.disabled_contains_salt:
# should return new salt for each call (e.g. django_disabled)
self.assertNotEqual(disabled_default2, disabled_default)
elif error is None:
# should return same result for each hash, but unique across hashes
self.assertEqual(disabled_default2, disabled_default)
# repeating same hash ...
disabled_stub2 = handler.disable(stub)
if self.disabled_contains_salt:
# ... should return different string (if salted)
self.assertNotEqual(disabled_stub2, disabled_stub)
else:
# ... should return same string
self.assertEqual(disabled_stub2, disabled_stub)
# using different hash ...
disabled_other = handler.disable(stub + 'xxx')
if self.disabled_contains_salt or error is None:
# ... should return different string (if salted or hash encoded)
self.assertNotEqual(disabled_other, disabled_stub)
else:
# ... should return same string
self.assertEqual(disabled_other, disabled_stub)
#===================================================================
# eoc
#===================================================================
#=============================================================================
# HandlerCase mixins providing additional tests for certain hashes
#=============================================================================
class OsCryptMixin(HandlerCase):
"""helper used by create_backend_case() which adds additional features
to test the os_crypt backend.
* if crypt support is missing, inserts fake crypt support to simulate
a working safe_crypt, to test passlib's codepath as fully as possible.
* extra tests to verify non-conformant crypt implementations are handled
correctly.
* check that native crypt support is detected correctly for known platforms.
"""
#===================================================================
# class attrs
#===================================================================
# platforms that are known to support / not support this hash natively.
# list of (platform_regex, True|False|None) entries.
platform_crypt_support = []
#===================================================================
# instance attrs
#===================================================================
__unittest_skip = True
# force this backend
backend = "os_crypt"
# flag read by HandlerCase to detect if fake os crypt is enabled.
using_patched_crypt = False
#===================================================================
# setup
#===================================================================
def setUp(self):
assert self.backend == "os_crypt"
if not self.handler.has_backend("os_crypt"):
# XXX: currently, any tests that use this are skipped entirely! (see issue 120)
self._patch_safe_crypt()
super(OsCryptMixin, self).setUp()
@classmethod
def _get_safe_crypt_handler_backend(cls):
"""
return (handler, backend) pair to use for faking crypt.crypt() support for hash.
backend will be None if none availabe.
"""
# find handler that generates safe_crypt() compatible hash
handler = unwrap_handler(cls.handler)
# hack to prevent recursion issue when .has_backend() is called
handler.get_backend()
# find backend which isn't os_crypt
alt_backend = get_alt_backend(handler, "os_crypt")
return handler, alt_backend
@property
def has_os_crypt_fallback(self):
"""
test if there's a fallback handler to test against if os_crypt can't support
a specified secret (may be explicitly set to False for some subclasses)
"""
return self._get_safe_crypt_handler_backend()[0] is not None
def _patch_safe_crypt(self):
"""if crypt() doesn't support current hash alg, this patches
safe_crypt() so that it transparently uses another one of the handler's
backends, so that we can go ahead and test as much of code path
as possible.
"""
# find handler & backend
handler, alt_backend = self._get_safe_crypt_handler_backend()
if not alt_backend:
raise AssertionError("handler has no available alternate backends!")
# create subclass of handler, which we swap to an alternate backend
alt_handler = handler.using()
alt_handler.set_backend(alt_backend)
def crypt_stub(secret, hash):
hash = alt_handler.genhash(secret, hash)
assert isinstance(hash, str)
return hash
import passlib.utils as mod
self.patchAttr(mod, "_crypt", crypt_stub)
self.using_patched_crypt = True
@classmethod
def _get_skip_backend_reason(cls, backend):
"""
make sure os_crypt backend is tested
when it's known os_crypt will be faked by _patch_safe_crypt()
"""
assert backend == "os_crypt"
reason = super(OsCryptMixin, cls)._get_skip_backend_reason(backend)
from passlib.utils import has_crypt
if reason == cls._BACKEND_NOT_AVAILABLE and has_crypt:
if TEST_MODE("full") and cls._get_safe_crypt_handler_backend()[1]:
# in this case, _patch_safe_crypt() will monkeypatch os_crypt
# to use another backend, just so we can test os_crypt fully.
return None
else:
return "hash not supported by os crypt()"
return reason
#===================================================================
# custom tests
#===================================================================
# TODO: turn into decorator, and use mock library.
def _use_mock_crypt(self):
"""
patch passlib.utils.safe_crypt() so it returns mock value for duration of test.
returns function whose .return_value controls what's returned.
this defaults to None.
"""
import passlib.utils as mod
def mock_crypt(secret, config):
# let 'test' string through so _load_os_crypt_backend() will still work
if secret == "test":
return mock_crypt.__wrapped__(secret, config)
else:
return mock_crypt.return_value
mock_crypt.__wrapped__ = mod._crypt
mock_crypt.return_value = None
self.patchAttr(mod, "_crypt", mock_crypt)
return mock_crypt
def test_80_faulty_crypt(self):
"""test with faulty crypt()"""
hash = self.get_sample_hash()[1]
exc_types = (exc.InternalBackendError,)
mock_crypt = self._use_mock_crypt()
def test(value):
# set safe_crypt() to return specified value, and
# make sure assertion error is raised by handler.
mock_crypt.return_value = value
self.assertRaises(exc_types, self.do_genhash, "stub", hash)
self.assertRaises(exc_types, self.do_encrypt, "stub")
self.assertRaises(exc_types, self.do_verify, "stub", hash)
test('$x' + hash[2:]) # detect wrong prefix
test(hash[:-1]) # detect too short
test(hash + 'x') # detect too long
def test_81_crypt_fallback(self):
"""test per-call crypt() fallback"""
# mock up safe_crypt to return None
mock_crypt = self._use_mock_crypt()
mock_crypt.return_value = None
if self.has_os_crypt_fallback:
# handler should have a fallback to use when os_crypt backend refuses to handle secret.
h1 = self.do_encrypt("stub")
h2 = self.do_genhash("stub", h1)
self.assertEqual(h2, h1)
self.assertTrue(self.do_verify("stub", h1))
else:
# handler should give up
from passlib.exc import InternalBackendError as err_type
hash = self.get_sample_hash()[1]
self.assertRaises(err_type, self.do_encrypt, 'stub')
self.assertRaises(err_type, self.do_genhash, 'stub', hash)
self.assertRaises(err_type, self.do_verify, 'stub', hash)
@doesnt_require_backend
def test_82_crypt_support(self):
"""
test platform-specific crypt() support detection
NOTE: this is mainly just a sanity check to ensure the runtime
detection is functioning correctly on some known platforms,
so that we can feel more confident it'll work right on unknown ones.
"""
# skip wrapper handlers, won't ever have crypt support
if hasattr(self.handler, "orig_prefix"):
raise self.skipTest("not applicable to wrappers")
# look for first entry that matches current system
# XXX: append "/" + platform.release() to string?
# XXX: probably should rework to support rows being dicts w/ "minver" / "maxver" keys,
# instead of hack where we add major # as part of platform regex.
using_backend = not self.using_patched_crypt
name = self.handler.name
platform = sys.platform
for pattern, expected in self.platform_crypt_support:
if re.match(pattern, platform):
break
else:
raise self.skipTest("no data for %r platform (current host support = %r)" %
(platform, using_backend))
# rules can use "state=None" to signal varied support;
# e.g. platform='freebsd8' ... sha256_crypt not added until 8.3
if expected is None:
raise self.skipTest("varied support on %r platform (current host support = %r)" %
(platform, using_backend))
# compare expectation vs reality
if expected == using_backend:
pass
elif expected:
self.fail("expected %r platform would have native support for %r" %
(platform, name))
else:
self.fail("did not expect %r platform would have native support for %r" %
(platform, name))
#===================================================================
# fuzzy verified support -- add additional verifier that uses os crypt()
#===================================================================
def fuzz_verifier_crypt(self):
"""test results against OS crypt()"""
# don't use this if we're faking safe_crypt (pointless test),
# or if handler is a wrapper (only original handler will be supported by os)
handler = self.handler
if self.using_patched_crypt or hasattr(handler, "wrapped"):
return None
# create a wrapper for fuzzy verified to use
from crypt import crypt
from passlib.utils import _safe_crypt_lock
encoding = self.FuzzHashGenerator.password_encoding
def check_crypt(secret, hash):
"""stdlib-crypt"""
if not self.crypt_supports_variant(hash):
return "skip"
# XXX: any reason not to use safe_crypt() here? or just want to test against bare metal?
secret = to_native_str(secret, encoding)
with _safe_crypt_lock:
return crypt(secret, hash) == hash
return check_crypt
def crypt_supports_variant(self, hash):
"""
fuzzy_verified_crypt() helper --
used to determine if os crypt() supports a particular hash variant.
"""
return True
#===================================================================
# eoc
#===================================================================
class UserHandlerMixin(HandlerCase):
"""helper for handlers w/ 'user' context kwd; mixin for HandlerCase
this overrides the HandlerCase test harness methods
so that a username is automatically inserted to hash/verify
calls. as well, passing in a pair of strings as the password
will be interpreted as (secret,user)
"""
#===================================================================
# option flags
#===================================================================
default_user = "user"
requires_user = True
user_case_insensitive = False
#===================================================================
# instance attrs
#===================================================================
__unittest_skip = True
#===================================================================
# custom tests
#===================================================================
def test_80_user(self):
"""test user context keyword"""
handler = self.handler
password = 'stub'
hash = handler.hash(password, user=self.default_user)
if self.requires_user:
self.assertRaises(TypeError, handler.hash, password)
self.assertRaises(TypeError, handler.genhash, password, hash)
self.assertRaises(TypeError, handler.verify, password, hash)
else:
# e.g. cisco_pix works with or without one.
handler.hash(password)
handler.genhash(password, hash)
handler.verify(password, hash)
def test_81_user_case(self):
"""test user case sensitivity"""
lower = self.default_user.lower()
upper = lower.upper()
hash = self.do_encrypt('stub', context=dict(user=lower))
if self.user_case_insensitive:
self.assertTrue(self.do_verify('stub', hash, user=upper),
"user should not be case sensitive")
else:
self.assertFalse(self.do_verify('stub', hash, user=upper),
"user should be case sensitive")
def test_82_user_salt(self):
"""test user used as salt"""
config = self.do_stub_encrypt()
h1 = self.do_genhash('stub', config, user='admin')
h2 = self.do_genhash('stub', config, user='admin')
self.assertEqual(h2, h1)
h3 = self.do_genhash('stub', config, user='root')
self.assertNotEqual(h3, h1)
# TODO: user size? kinda dicey, depends on algorithm.
#===================================================================
# override test helpers
#===================================================================
def populate_context(self, secret, kwds):
"""insert username into kwds"""
if isinstance(secret, tuple):
secret, user = secret
elif not self.requires_user:
return secret
else:
user = self.default_user
if 'user' not in kwds:
kwds['user'] = user
return secret
#===================================================================
# modify fuzz testing
#===================================================================
class FuzzHashGenerator(HandlerCase.FuzzHashGenerator):
context_map = HandlerCase.FuzzHashGenerator.context_map.copy()
context_map.update(user="random_user")
user_alphabet = u("asdQWE123")
def random_user(self):
rng = self.rng
if not self.test.requires_user and rng.random() < .1:
return None
return getrandstr(rng, self.user_alphabet, rng.randint(2,10))
#===================================================================
# eoc
#===================================================================
class EncodingHandlerMixin(HandlerCase):
"""helper for handlers w/ 'encoding' context kwd; mixin for HandlerCase
this overrides the HandlerCase test harness methods
so that an encoding can be inserted to hash/verify
calls by passing in a pair of strings as the password
will be interpreted as (secret,encoding)
"""
#===================================================================
# instance attrs
#===================================================================
__unittest_skip = True
# restrict stock passwords & fuzz alphabet to latin-1,
# so different encodings can be tested safely.
stock_passwords = [
u("test"),
b"test",
u("\u00AC\u00BA"),
]
class FuzzHashGenerator(HandlerCase.FuzzHashGenerator):
password_alphabet = u('qwerty1234<>.@*#! \u00AC')
def populate_context(self, secret, kwds):
"""insert encoding into kwds"""
if isinstance(secret, tuple):
secret, encoding = secret
kwds.setdefault('encoding', encoding)
return secret
#===================================================================
# eoc
#===================================================================
#=============================================================================
# warnings helpers
#=============================================================================
class reset_warnings(warnings.catch_warnings):
"""catch_warnings() wrapper which clears warning registry & filters"""
def __init__(self, reset_filter="always", reset_registry=".*", **kwds):
super(reset_warnings, self).__init__(**kwds)
self._reset_filter = reset_filter
self._reset_registry = re.compile(reset_registry) if reset_registry else None
def __enter__(self):
# let parent class archive filter state
ret = super(reset_warnings, self).__enter__()
# reset the filter to list everything
if self._reset_filter:
warnings.resetwarnings()
warnings.simplefilter(self._reset_filter)
# archive and clear the __warningregistry__ key for all modules
# that match the 'reset' pattern.
pattern = self._reset_registry
if pattern:
backup = self._orig_registry = {}
for name, mod in list(sys.modules.items()):
if mod is None or not pattern.match(name):
continue
reg = getattr(mod, "__warningregistry__", None)
if reg:
backup[name] = reg.copy()
reg.clear()
return ret
def __exit__(self, *exc_info):
# restore warning registry for all modules
pattern = self._reset_registry
if pattern:
# restore registry backup, clearing all registry entries that we didn't archive
backup = self._orig_registry
for name, mod in list(sys.modules.items()):
if mod is None or not pattern.match(name):
continue
reg = getattr(mod, "__warningregistry__", None)
if reg:
reg.clear()
orig = backup.get(name)
if orig:
if reg is None:
setattr(mod, "__warningregistry__", orig)
else:
reg.update(orig)
super(reset_warnings, self).__exit__(*exc_info)
#=============================================================================
# eof
#=============================================================================