Python code coverage for Lib/test/test_hashlib.py

#	count	content
1	n/a	# Test hashlib module
2	n/a	#
3	n/a	# $Id$
4	n/a	#
5	n/a	# Copyright (C) 2005-2010 Gregory P. Smith (greg@krypto.org)
6	n/a	# Licensed to PSF under a Contributor Agreement.
7	n/a	#
8	n/a
9	n/a	import array
10	n/a	from binascii import unhexlify
11	n/a	import hashlib
12	n/a	import itertools
13	n/a	import os
14	n/a	import sys
15	n/a	try:
16	n/a	import threading
17	n/a	except ImportError:
18	n/a	threading = None
19	n/a	import unittest
20	n/a	import warnings
21	n/a	from test import support
22	n/a	from test.support import _4G, bigmemtest, import_fresh_module
23	n/a	from http.client import HTTPException
24	n/a
25	n/a	# Were we compiled --with-pydebug or with #define Py_DEBUG?
26	n/a	COMPILED_WITH_PYDEBUG = hasattr(sys, 'gettotalrefcount')
27	n/a
28	n/a	c_hashlib = import_fresh_module('hashlib', fresh=['_hashlib'])
29	n/a	py_hashlib = import_fresh_module('hashlib', blocked=['_hashlib'])
30	n/a
31	n/a	try:
32	n/a	import _blake2
33	n/a	except ImportError:
34	n/a	_blake2 = None
35	n/a
36	n/a	requires_blake2 = unittest.skipUnless(_blake2, 'requires _blake2')
37	n/a
38	n/a	try:
39	n/a	import _sha3
40	n/a	except ImportError:
41	n/a	_sha3 = None
42	n/a
43	n/a	requires_sha3 = unittest.skipUnless(_sha3, 'requires _sha3')
44	n/a
45	n/a
46	n/a	def hexstr(s):
47	n/a	assert isinstance(s, bytes), repr(s)
48	n/a	h = "0123456789abcdef"
49	n/a	r = ''
50	n/a	for i in s:
51	n/a	r += h[(i >> 4) & 0xF] + h[i & 0xF]
52	n/a	return r
53	n/a
54	n/a
55	n/a	URL = "http://www.pythontest.net/hashlib/{}.txt"
56	n/a
57	n/a	def read_vectors(hash_name):
58	n/a	url = URL.format(hash_name)
59	n/a	try:
60	n/a	testdata = support.open_urlresource(url)
61	n/a	except (OSError, HTTPException):
62	n/a	raise unittest.SkipTest("Could not retrieve {}".format(url))
63	n/a	with testdata:
64	n/a	for line in testdata:
65	n/a	line = line.strip()
66	n/a	if line.startswith('#') or not line:
67	n/a	continue
68	n/a	parts = line.split(',')
69	n/a	parts[0] = bytes.fromhex(parts[0])
70	n/a	yield parts
71	n/a
72	n/a
73	n/a	class HashLibTestCase(unittest.TestCase):
74	n/a	supported_hash_names = ( 'md5', 'MD5', 'sha1', 'SHA1',
75	n/a	'sha224', 'SHA224', 'sha256', 'SHA256',
76	n/a	'sha384', 'SHA384', 'sha512', 'SHA512',
77	n/a	'blake2b', 'blake2s',
78	n/a	'sha3_224', 'sha3_256', 'sha3_384', 'sha3_512',
79	n/a	'shake_128', 'shake_256')
80	n/a
81	n/a	shakes = {'shake_128', 'shake_256'}
82	n/a
83	n/a	# Issue #14693: fallback modules are always compiled under POSIX
84	n/a	_warn_on_extension_import = os.name == 'posix' or COMPILED_WITH_PYDEBUG
85	n/a
86	n/a	def _conditional_import_module(self, module_name):
87	n/a	"""Import a module and return a reference to it or None on failure."""
88	n/a	try:
89	n/a	exec('import '+module_name)
90	n/a	except ImportError as error:
91	n/a	if self._warn_on_extension_import:
92	n/a	warnings.warn('Did a C extension fail to compile? %s' % error)
93	n/a	return locals().get(module_name)
94	n/a
95	n/a	def __init__(self, args, *kwargs):
96	n/a	algorithms = set()
97	n/a	for algorithm in self.supported_hash_names:
98	n/a	algorithms.add(algorithm.lower())
99	n/a
100	n/a	_blake2 = self._conditional_import_module('_blake2')
101	n/a	if _blake2:
102	n/a	algorithms.update({'blake2b', 'blake2s'})
103	n/a
104	n/a	self.constructors_to_test = {}
105	n/a	for algorithm in algorithms:
106	n/a	self.constructors_to_test[algorithm] = set()
107	n/a
108	n/a	# For each algorithm, test the direct constructor and the use
109	n/a	# of hashlib.new given the algorithm name.
110	n/a	for algorithm, constructors in self.constructors_to_test.items():
111	n/a	constructors.add(getattr(hashlib, algorithm))
112	n/a	def _test_algorithm_via_hashlib_new(data=None, _alg=algorithm, **kwargs):
113	n/a	if data is None:
114	n/a	return hashlib.new(_alg, **kwargs)
115	n/a	return hashlib.new(_alg, data, **kwargs)
116	n/a	constructors.add(_test_algorithm_via_hashlib_new)
117	n/a
118	n/a	_hashlib = self._conditional_import_module('_hashlib')
119	n/a	if _hashlib:
120	n/a	# These two algorithms should always be present when this module
121	n/a	# is compiled. If not, something was compiled wrong.
122	n/a	self.assertTrue(hasattr(_hashlib, 'openssl_md5'))
123	n/a	self.assertTrue(hasattr(_hashlib, 'openssl_sha1'))
124	n/a	for algorithm, constructors in self.constructors_to_test.items():
125	n/a	constructor = getattr(_hashlib, 'openssl_'+algorithm, None)
126	n/a	if constructor:
127	n/a	constructors.add(constructor)
128	n/a
129	n/a	def add_builtin_constructor(name):
130	n/a	constructor = getattr(hashlib, "__get_builtin_constructor")(name)
131	n/a	self.constructors_to_test[name].add(constructor)
132	n/a
133	n/a	_md5 = self._conditional_import_module('_md5')
134	n/a	if _md5:
135	n/a	add_builtin_constructor('md5')
136	n/a	_sha1 = self._conditional_import_module('_sha1')
137	n/a	if _sha1:
138	n/a	add_builtin_constructor('sha1')
139	n/a	_sha256 = self._conditional_import_module('_sha256')
140	n/a	if _sha256:
141	n/a	add_builtin_constructor('sha224')
142	n/a	add_builtin_constructor('sha256')
143	n/a	_sha512 = self._conditional_import_module('_sha512')
144	n/a	if _sha512:
145	n/a	add_builtin_constructor('sha384')
146	n/a	add_builtin_constructor('sha512')
147	n/a	if _blake2:
148	n/a	add_builtin_constructor('blake2s')
149	n/a	add_builtin_constructor('blake2b')
150	n/a
151	n/a	_sha3 = self._conditional_import_module('_sha3')
152	n/a	if _sha3:
153	n/a	add_builtin_constructor('sha3_224')
154	n/a	add_builtin_constructor('sha3_256')
155	n/a	add_builtin_constructor('sha3_384')
156	n/a	add_builtin_constructor('sha3_512')
157	n/a	add_builtin_constructor('shake_128')
158	n/a	add_builtin_constructor('shake_256')
159	n/a
160	n/a	super(HashLibTestCase, self).__init__(args, *kwargs)
161	n/a
162	n/a	@property
163	n/a	def hash_constructors(self):
164	n/a	constructors = self.constructors_to_test.values()
165	n/a	return itertools.chain.from_iterable(constructors)
166	n/a
167	n/a	def test_hash_array(self):
168	n/a	a = array.array("b", range(10))
169	n/a	for cons in self.hash_constructors:
170	n/a	c = cons(a)
171	n/a	if c.name in self.shakes:
172	n/a	c.hexdigest(16)
173	n/a	else:
174	n/a	c.hexdigest()
175	n/a
176	n/a	def test_algorithms_guaranteed(self):
177	n/a	self.assertEqual(hashlib.algorithms_guaranteed,
178	n/a	set(_algo for _algo in self.supported_hash_names
179	n/a	if _algo.islower()))
180	n/a
181	n/a	def test_algorithms_available(self):
182	n/a	self.assertTrue(set(hashlib.algorithms_guaranteed).
183	n/a	issubset(hashlib.algorithms_available))
184	n/a
185	n/a	def test_unknown_hash(self):
186	n/a	self.assertRaises(ValueError, hashlib.new, 'spam spam spam spam spam')
187	n/a	self.assertRaises(TypeError, hashlib.new, 1)
188	n/a
189	n/a	def test_get_builtin_constructor(self):
190	n/a	get_builtin_constructor = getattr(hashlib,
191	n/a	'__get_builtin_constructor')
192	n/a	builtin_constructor_cache = getattr(hashlib,
193	n/a	'__builtin_constructor_cache')
194	n/a	self.assertRaises(ValueError, get_builtin_constructor, 'test')
195	n/a	try:
196	n/a	import _md5
197	n/a	except ImportError:
198	n/a	pass
199	n/a	# This forces an ImportError for "import _md5" statements
200	n/a	sys.modules['_md5'] = None
201	n/a	# clear the cache
202	n/a	builtin_constructor_cache.clear()
203	n/a	try:
204	n/a	self.assertRaises(ValueError, get_builtin_constructor, 'md5')
205	n/a	finally:
206	n/a	if '_md5' in locals():
207	n/a	sys.modules['_md5'] = _md5
208	n/a	else:
209	n/a	del sys.modules['_md5']
210	n/a	self.assertRaises(TypeError, get_builtin_constructor, 3)
211	n/a	constructor = get_builtin_constructor('md5')
212	n/a	self.assertIs(constructor, _md5.md5)
213	n/a	self.assertEqual(sorted(builtin_constructor_cache), ['MD5', 'md5'])
214	n/a
215	n/a	def test_hexdigest(self):
216	n/a	for cons in self.hash_constructors:
217	n/a	h = cons()
218	n/a	if h.name in self.shakes:
219	n/a	self.assertIsInstance(h.digest(16), bytes)
220	n/a	self.assertEqual(hexstr(h.digest(16)), h.hexdigest(16))
221	n/a	else:
222	n/a	self.assertIsInstance(h.digest(), bytes)
223	n/a	self.assertEqual(hexstr(h.digest()), h.hexdigest())
224	n/a
225	n/a	def test_name_attribute(self):
226	n/a	for cons in self.hash_constructors:
227	n/a	h = cons()
228	n/a	self.assertIsInstance(h.name, str)
229	n/a	if h.name in self.supported_hash_names:
230	n/a	self.assertIn(h.name, self.supported_hash_names)
231	n/a	else:
232	n/a	self.assertNotIn(h.name, self.supported_hash_names)
233	n/a	self.assertEqual(h.name, hashlib.new(h.name).name)
234	n/a
235	n/a	def test_large_update(self):
236	n/a	aas = b'a' * 128
237	n/a	bees = b'b' * 127
238	n/a	cees = b'c' * 126
239	n/a	dees = b'd' * 2048 # HASHLIB_GIL_MINSIZE
240	n/a
241	n/a	for cons in self.hash_constructors:
242	n/a	m1 = cons()
243	n/a	m1.update(aas)
244	n/a	m1.update(bees)
245	n/a	m1.update(cees)
246	n/a	m1.update(dees)
247	n/a	if m1.name in self.shakes:
248	n/a	args = (16,)
249	n/a	else:
250	n/a	args = ()
251	n/a
252	n/a	m2 = cons()
253	n/a	m2.update(aas + bees + cees + dees)
254	n/a	self.assertEqual(m1.digest(args), m2.digest(args))
255	n/a
256	n/a	m3 = cons(aas + bees + cees + dees)
257	n/a	self.assertEqual(m1.digest(args), m3.digest(args))
258	n/a
259	n/a	# verify copy() doesn't touch original
260	n/a	m4 = cons(aas + bees + cees)
261	n/a	m4_digest = m4.digest(*args)
262	n/a	m4_copy = m4.copy()
263	n/a	m4_copy.update(dees)
264	n/a	self.assertEqual(m1.digest(args), m4_copy.digest(args))
265	n/a	self.assertEqual(m4.digest(*args), m4_digest)
266	n/a
267	n/a	def check(self, name, data, hexdigest, shake=False, **kwargs):
268	n/a	length = len(hexdigest)//2
269	n/a	hexdigest = hexdigest.lower()
270	n/a	constructors = self.constructors_to_test[name]
271	n/a	# 2 is for hashlib.name(...) and hashlib.new(name, ...)
272	n/a	self.assertGreaterEqual(len(constructors), 2)
273	n/a	for hash_object_constructor in constructors:
274	n/a	m = hash_object_constructor(data, **kwargs)
275	n/a	computed = m.hexdigest() if not shake else m.hexdigest(length)
276	n/a	self.assertEqual(
277	n/a	computed, hexdigest,
278	n/a	"Hash algorithm %s constructed using %s returned hexdigest"
279	n/a	" %r for %d byte input data that should have hashed to %r."
280	n/a	% (name, hash_object_constructor,
281	n/a	computed, len(data), hexdigest))
282	n/a	computed = m.digest() if not shake else m.digest(length)
283	n/a	digest = bytes.fromhex(hexdigest)
284	n/a	self.assertEqual(computed, digest)
285	n/a	if not shake:
286	n/a	self.assertEqual(len(digest), m.digest_size)
287	n/a
288	n/a	def check_no_unicode(self, algorithm_name):
289	n/a	# Unicode objects are not allowed as input.
290	n/a	constructors = self.constructors_to_test[algorithm_name]
291	n/a	for hash_object_constructor in constructors:
292	n/a	self.assertRaises(TypeError, hash_object_constructor, 'spam')
293	n/a
294	n/a	def test_no_unicode(self):
295	n/a	self.check_no_unicode('md5')
296	n/a	self.check_no_unicode('sha1')
297	n/a	self.check_no_unicode('sha224')
298	n/a	self.check_no_unicode('sha256')
299	n/a	self.check_no_unicode('sha384')
300	n/a	self.check_no_unicode('sha512')
301	n/a
302	n/a	@requires_blake2
303	n/a	def test_no_unicode_blake2(self):
304	n/a	self.check_no_unicode('blake2b')
305	n/a	self.check_no_unicode('blake2s')
306	n/a
307	n/a	@requires_sha3
308	n/a	def test_no_unicode_sha3(self):
309	n/a	self.check_no_unicode('sha3_224')
310	n/a	self.check_no_unicode('sha3_256')
311	n/a	self.check_no_unicode('sha3_384')
312	n/a	self.check_no_unicode('sha3_512')
313	n/a	self.check_no_unicode('shake_128')
314	n/a	self.check_no_unicode('shake_256')
315	n/a
316	n/a	def check_blocksize_name(self, name, block_size=0, digest_size=0,
317	n/a	digest_length=None):
318	n/a	constructors = self.constructors_to_test[name]
319	n/a	for hash_object_constructor in constructors:
320	n/a	m = hash_object_constructor()
321	n/a	self.assertEqual(m.block_size, block_size)
322	n/a	self.assertEqual(m.digest_size, digest_size)
323	n/a	if digest_length:
324	n/a	self.assertEqual(len(m.digest(digest_length)),
325	n/a	digest_length)
326	n/a	self.assertEqual(len(m.hexdigest(digest_length)),
327	n/a	2*digest_length)
328	n/a	else:
329	n/a	self.assertEqual(len(m.digest()), digest_size)
330	n/a	self.assertEqual(len(m.hexdigest()), 2*digest_size)
331	n/a	self.assertEqual(m.name, name)
332	n/a	# split for sha3_512 / _sha3.sha3 object
333	n/a	self.assertIn(name.split("_")[0], repr(m))
334	n/a
335	n/a	def test_blocksize_name(self):
336	n/a	self.check_blocksize_name('md5', 64, 16)
337	n/a	self.check_blocksize_name('sha1', 64, 20)
338	n/a	self.check_blocksize_name('sha224', 64, 28)
339	n/a	self.check_blocksize_name('sha256', 64, 32)
340	n/a	self.check_blocksize_name('sha384', 128, 48)
341	n/a	self.check_blocksize_name('sha512', 128, 64)
342	n/a
343	n/a	@requires_sha3
344	n/a	def test_blocksize_name_sha3(self):
345	n/a	self.check_blocksize_name('sha3_224', 144, 28)
346	n/a	self.check_blocksize_name('sha3_256', 136, 32)
347	n/a	self.check_blocksize_name('sha3_384', 104, 48)
348	n/a	self.check_blocksize_name('sha3_512', 72, 64)
349	n/a	self.check_blocksize_name('shake_128', 168, 0, 32)
350	n/a	self.check_blocksize_name('shake_256', 136, 0, 64)
351	n/a
352	n/a	def check_sha3(self, name, capacity, rate, suffix):
353	n/a	constructors = self.constructors_to_test[name]
354	n/a	for hash_object_constructor in constructors:
355	n/a	m = hash_object_constructor()
356	n/a	self.assertEqual(capacity + rate, 1600)
357	n/a	self.assertEqual(m._capacity_bits, capacity)
358	n/a	self.assertEqual(m._rate_bits, rate)
359	n/a	self.assertEqual(m._suffix, suffix)
360	n/a
361	n/a	@requires_sha3
362	n/a	def test_extra_sha3(self):
363	n/a	self.check_sha3('sha3_224', 448, 1152, b'\x06')
364	n/a	self.check_sha3('sha3_256', 512, 1088, b'\x06')
365	n/a	self.check_sha3('sha3_384', 768, 832, b'\x06')
366	n/a	self.check_sha3('sha3_512', 1024, 576, b'\x06')
367	n/a	self.check_sha3('shake_128', 256, 1344, b'\x1f')
368	n/a	self.check_sha3('shake_256', 512, 1088, b'\x1f')
369	n/a
370	n/a	@requires_blake2
371	n/a	def test_blocksize_name_blake2(self):
372	n/a	self.check_blocksize_name('blake2b', 128, 64)
373	n/a	self.check_blocksize_name('blake2s', 64, 32)
374	n/a
375	n/a	def test_case_md5_0(self):
376	n/a	self.check('md5', b'', 'd41d8cd98f00b204e9800998ecf8427e')
377	n/a
378	n/a	def test_case_md5_1(self):
379	n/a	self.check('md5', b'abc', '900150983cd24fb0d6963f7d28e17f72')
380	n/a
381	n/a	def test_case_md5_2(self):
382	n/a	self.check('md5',
383	n/a	b'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
384	n/a	'd174ab98d277d9f5a5611c2c9f419d9f')
385	n/a
386	n/a	@unittest.skipIf(sys.maxsize < _4G + 5, 'test cannot run on 32-bit systems')
387	n/a	@bigmemtest(size=_4G + 5, memuse=1, dry_run=False)
388	n/a	def test_case_md5_huge(self, size):
389	n/a	self.check('md5', b'A'*size, 'c9af2dff37468ce5dfee8f2cfc0a9c6d')
390	n/a
391	n/a	@unittest.skipIf(sys.maxsize < _4G - 1, 'test cannot run on 32-bit systems')
392	n/a	@bigmemtest(size=_4G - 1, memuse=1, dry_run=False)
393	n/a	def test_case_md5_uintmax(self, size):
394	n/a	self.check('md5', b'A'*size, '28138d306ff1b8281f1a9067e1a1a2b3')
395	n/a
396	n/a	# use the three examples from Federal Information Processing Standards
397	n/a	# Publication 180-1, Secure Hash Standard, 1995 April 17
398	n/a	# http://www.itl.nist.gov/div897/pubs/fip180-1.htm
399	n/a
400	n/a	def test_case_sha1_0(self):
401	n/a	self.check('sha1', b"",
402	n/a	"da39a3ee5e6b4b0d3255bfef95601890afd80709")
403	n/a
404	n/a	def test_case_sha1_1(self):
405	n/a	self.check('sha1', b"abc",
406	n/a	"a9993e364706816aba3e25717850c26c9cd0d89d")
407	n/a
408	n/a	def test_case_sha1_2(self):
409	n/a	self.check('sha1',
410	n/a	b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
411	n/a	"84983e441c3bd26ebaae4aa1f95129e5e54670f1")
412	n/a
413	n/a	def test_case_sha1_3(self):
414	n/a	self.check('sha1', b"a" * 1000000,
415	n/a	"34aa973cd4c4daa4f61eeb2bdbad27316534016f")
416	n/a
417	n/a
418	n/a	# use the examples from Federal Information Processing Standards
419	n/a	# Publication 180-2, Secure Hash Standard, 2002 August 1
420	n/a	# http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
421	n/a
422	n/a	def test_case_sha224_0(self):
423	n/a	self.check('sha224', b"",
424	n/a	"d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f")
425	n/a
426	n/a	def test_case_sha224_1(self):
427	n/a	self.check('sha224', b"abc",
428	n/a	"23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7")
429	n/a
430	n/a	def test_case_sha224_2(self):
431	n/a	self.check('sha224',
432	n/a	b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
433	n/a	"75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525")
434	n/a
435	n/a	def test_case_sha224_3(self):
436	n/a	self.check('sha224', b"a" * 1000000,
437	n/a	"20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67")
438	n/a
439	n/a
440	n/a	def test_case_sha256_0(self):
441	n/a	self.check('sha256', b"",
442	n/a	"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
443	n/a
444	n/a	def test_case_sha256_1(self):
445	n/a	self.check('sha256', b"abc",
446	n/a	"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
447	n/a
448	n/a	def test_case_sha256_2(self):
449	n/a	self.check('sha256',
450	n/a	b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
451	n/a	"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1")
452	n/a
453	n/a	def test_case_sha256_3(self):
454	n/a	self.check('sha256', b"a" * 1000000,
455	n/a	"cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0")
456	n/a
457	n/a
458	n/a	def test_case_sha384_0(self):
459	n/a	self.check('sha384', b"",
460	n/a	"38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da"+
461	n/a	"274edebfe76f65fbd51ad2f14898b95b")
462	n/a
463	n/a	def test_case_sha384_1(self):
464	n/a	self.check('sha384', b"abc",
465	n/a	"cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"+
466	n/a	"8086072ba1e7cc2358baeca134c825a7")
467	n/a
468	n/a	def test_case_sha384_2(self):
469	n/a	self.check('sha384',
470	n/a	b"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
471	n/a	b"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
472	n/a	"09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"+
473	n/a	"fcc7c71a557e2db966c3e9fa91746039")
474	n/a
475	n/a	def test_case_sha384_3(self):
476	n/a	self.check('sha384', b"a" * 1000000,
477	n/a	"9d0e1809716474cb086e834e310a4a1ced149e9c00f248527972cec5704c2a5b"+
478	n/a	"07b8b3dc38ecc4ebae97ddd87f3d8985")
479	n/a
480	n/a
481	n/a	def test_case_sha512_0(self):
482	n/a	self.check('sha512', b"",
483	n/a	"cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce"+
484	n/a	"47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e")
485	n/a
486	n/a	def test_case_sha512_1(self):
487	n/a	self.check('sha512', b"abc",
488	n/a	"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"+
489	n/a	"2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")
490	n/a
491	n/a	def test_case_sha512_2(self):
492	n/a	self.check('sha512',
493	n/a	b"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
494	n/a	b"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
495	n/a	"8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"+
496	n/a	"501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909")
497	n/a
498	n/a	def test_case_sha512_3(self):
499	n/a	self.check('sha512', b"a" * 1000000,
500	n/a	"e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"+
501	n/a	"de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b")
502	n/a
503	n/a	def check_blake2(self, constructor, salt_size, person_size, key_size,
504	n/a	digest_size, max_offset):
505	n/a	self.assertEqual(constructor.SALT_SIZE, salt_size)
506	n/a	for i in range(salt_size + 1):
507	n/a	constructor(salt=b'a' * i)
508	n/a	salt = b'a' * (salt_size + 1)
509	n/a	self.assertRaises(ValueError, constructor, salt=salt)
510	n/a
511	n/a	self.assertEqual(constructor.PERSON_SIZE, person_size)
512	n/a	for i in range(person_size+1):
513	n/a	constructor(person=b'a' * i)
514	n/a	person = b'a' * (person_size + 1)
515	n/a	self.assertRaises(ValueError, constructor, person=person)
516	n/a
517	n/a	self.assertEqual(constructor.MAX_DIGEST_SIZE, digest_size)
518	n/a	for i in range(1, digest_size + 1):
519	n/a	constructor(digest_size=i)
520	n/a	self.assertRaises(ValueError, constructor, digest_size=-1)
521	n/a	self.assertRaises(ValueError, constructor, digest_size=0)
522	n/a	self.assertRaises(ValueError, constructor, digest_size=digest_size+1)
523	n/a
524	n/a	self.assertEqual(constructor.MAX_KEY_SIZE, key_size)
525	n/a	for i in range(key_size+1):
526	n/a	constructor(key=b'a' * i)
527	n/a	key = b'a' * (key_size + 1)
528	n/a	self.assertRaises(ValueError, constructor, key=key)
529	n/a	self.assertEqual(constructor().hexdigest(),
530	n/a	constructor(key=b'').hexdigest())
531	n/a
532	n/a	for i in range(0, 256):
533	n/a	constructor(fanout=i)
534	n/a	self.assertRaises(ValueError, constructor, fanout=-1)
535	n/a	self.assertRaises(ValueError, constructor, fanout=256)
536	n/a
537	n/a	for i in range(1, 256):
538	n/a	constructor(depth=i)
539	n/a	self.assertRaises(ValueError, constructor, depth=-1)
540	n/a	self.assertRaises(ValueError, constructor, depth=0)
541	n/a	self.assertRaises(ValueError, constructor, depth=256)
542	n/a
543	n/a	for i in range(0, 256):
544	n/a	constructor(node_depth=i)
545	n/a	self.assertRaises(ValueError, constructor, node_depth=-1)
546	n/a	self.assertRaises(ValueError, constructor, node_depth=256)
547	n/a
548	n/a	for i in range(0, digest_size + 1):
549	n/a	constructor(inner_size=i)
550	n/a	self.assertRaises(ValueError, constructor, inner_size=-1)
551	n/a	self.assertRaises(ValueError, constructor, inner_size=digest_size+1)
552	n/a
553	n/a	constructor(leaf_size=0)
554	n/a	constructor(leaf_size=(1<<32)-1)
555	n/a	self.assertRaises(OverflowError, constructor, leaf_size=-1)
556	n/a	self.assertRaises(OverflowError, constructor, leaf_size=1<<32)
557	n/a
558	n/a	constructor(node_offset=0)
559	n/a	constructor(node_offset=max_offset)
560	n/a	self.assertRaises(OverflowError, constructor, node_offset=-1)
561	n/a	self.assertRaises(OverflowError, constructor, node_offset=max_offset+1)
562	n/a
563	n/a	constructor(
564	n/a	string=b'',
565	n/a	key=b'',
566	n/a	salt=b'',
567	n/a	person=b'',
568	n/a	digest_size=17,
569	n/a	fanout=1,
570	n/a	depth=1,
571	n/a	leaf_size=256,
572	n/a	node_offset=512,
573	n/a	node_depth=1,
574	n/a	inner_size=7,
575	n/a	last_node=True
576	n/a	)
577	n/a
578	n/a	def blake2_rfc7693(self, constructor, md_len, in_len):
579	n/a	def selftest_seq(length, seed):
580	n/a	mask = (1<<32)-1
581	n/a	a = (0xDEAD4BAD * seed) & mask
582	n/a	b = 1
583	n/a	out = bytearray(length)
584	n/a	for i in range(length):
585	n/a	t = (a + b) & mask
586	n/a	a, b = b, t
587	n/a	out[i] = (t >> 24) & 0xFF
588	n/a	return out
589	n/a	outer = constructor(digest_size=32)
590	n/a	for outlen in md_len:
591	n/a	for inlen in in_len:
592	n/a	indata = selftest_seq(inlen, inlen)
593	n/a	key = selftest_seq(outlen, outlen)
594	n/a	unkeyed = constructor(indata, digest_size=outlen)
595	n/a	outer.update(unkeyed.digest())
596	n/a	keyed = constructor(indata, key=key, digest_size=outlen)
597	n/a	outer.update(keyed.digest())
598	n/a	return outer.hexdigest()
599	n/a
600	n/a	@requires_blake2
601	n/a	def test_blake2b(self):
602	n/a	self.check_blake2(hashlib.blake2b, 16, 16, 64, 64, (1<<64)-1)
603	n/a	b2b_md_len = [20, 32, 48, 64]
604	n/a	b2b_in_len = [0, 3, 128, 129, 255, 1024]
605	n/a	self.assertEqual(
606	n/a	self.blake2_rfc7693(hashlib.blake2b, b2b_md_len, b2b_in_len),
607	n/a	"c23a7800d98123bd10f506c61e29da5603d763b8bbad2e737f5e765a7bccd475")
608	n/a
609	n/a	@requires_blake2
610	n/a	def test_case_blake2b_0(self):
611	n/a	self.check('blake2b', b"",
612	n/a	"786a02f742015903c6c6fd852552d272912f4740e15847618a86e217f71f5419"+
613	n/a	"d25e1031afee585313896444934eb04b903a685b1448b755d56f701afe9be2ce")
614	n/a
615	n/a	@requires_blake2
616	n/a	def test_case_blake2b_1(self):
617	n/a	self.check('blake2b', b"abc",
618	n/a	"ba80a53f981c4d0d6a2797b69f12f6e94c212f14685ac4b74b12bb6fdbffa2d1"+
619	n/a	"7d87c5392aab792dc252d5de4533cc9518d38aa8dbf1925ab92386edd4009923")
620	n/a
621	n/a	@requires_blake2
622	n/a	def test_blake2b_vectors(self):
623	n/a	for msg, key, md in read_vectors('blake2b'):
624	n/a	key = bytes.fromhex(key)
625	n/a	self.check('blake2b', msg, md, key=key)
626	n/a
627	n/a	@requires_blake2
628	n/a	def test_blake2s(self):
629	n/a	self.check_blake2(hashlib.blake2s, 8, 8, 32, 32, (1<<48)-1)
630	n/a	b2s_md_len = [16, 20, 28, 32]
631	n/a	b2s_in_len = [0, 3, 64, 65, 255, 1024]
632	n/a	self.assertEqual(
633	n/a	self.blake2_rfc7693(hashlib.blake2s, b2s_md_len, b2s_in_len),
634	n/a	"6a411f08ce25adcdfb02aba641451cec53c598b24f4fc787fbdc88797f4c1dfe")
635	n/a
636	n/a	@requires_blake2
637	n/a	def test_case_blake2s_0(self):
638	n/a	self.check('blake2s', b"",
639	n/a	"69217a3079908094e11121d042354a7c1f55b6482ca1a51e1b250dfd1ed0eef9")
640	n/a
641	n/a	@requires_blake2
642	n/a	def test_case_blake2s_1(self):
643	n/a	self.check('blake2s', b"abc",
644	n/a	"508c5e8c327c14e2e1a72ba34eeb452f37458b209ed63a294d999b4c86675982")
645	n/a
646	n/a	@requires_blake2
647	n/a	def test_blake2s_vectors(self):
648	n/a	for msg, key, md in read_vectors('blake2s'):
649	n/a	key = bytes.fromhex(key)
650	n/a	self.check('blake2s', msg, md, key=key)
651	n/a
652	n/a	@requires_sha3
653	n/a	def test_case_sha3_224_0(self):
654	n/a	self.check('sha3_224', b"",
655	n/a	"6b4e03423667dbb73b6e15454f0eb1abd4597f9a1b078e3f5b5a6bc7")
656	n/a
657	n/a	@requires_sha3
658	n/a	def test_case_sha3_224_vector(self):
659	n/a	for msg, md in read_vectors('sha3_224'):
660	n/a	self.check('sha3_224', msg, md)
661	n/a
662	n/a	@requires_sha3
663	n/a	def test_case_sha3_256_0(self):
664	n/a	self.check('sha3_256', b"",
665	n/a	"a7ffc6f8bf1ed76651c14756a061d662f580ff4de43b49fa82d80a4b80f8434a")
666	n/a
667	n/a	@requires_sha3
668	n/a	def test_case_sha3_256_vector(self):
669	n/a	for msg, md in read_vectors('sha3_256'):
670	n/a	self.check('sha3_256', msg, md)
671	n/a
672	n/a	@requires_sha3
673	n/a	def test_case_sha3_384_0(self):
674	n/a	self.check('sha3_384', b"",
675	n/a	"0c63a75b845e4f7d01107d852e4c2485c51a50aaaa94fc61995e71bbee983a2a"+
676	n/a	"c3713831264adb47fb6bd1e058d5f004")
677	n/a
678	n/a	@requires_sha3
679	n/a	def test_case_sha3_384_vector(self):
680	n/a	for msg, md in read_vectors('sha3_384'):
681	n/a	self.check('sha3_384', msg, md)
682	n/a
683	n/a	@requires_sha3
684	n/a	def test_case_sha3_512_0(self):
685	n/a	self.check('sha3_512', b"",
686	n/a	"a69f73cca23a9ac5c8b567dc185a756e97c982164fe25859e0d1dcc1475c80a6"+
687	n/a	"15b2123af1f5f94c11e3e9402c3ac558f500199d95b6d3e301758586281dcd26")
688	n/a
689	n/a	@requires_sha3
690	n/a	def test_case_sha3_512_vector(self):
691	n/a	for msg, md in read_vectors('sha3_512'):
692	n/a	self.check('sha3_512', msg, md)
693	n/a
694	n/a	@requires_sha3
695	n/a	def test_case_shake_128_0(self):
696	n/a	self.check('shake_128', b"",
697	n/a	"7f9c2ba4e88f827d616045507605853ed73b8093f6efbc88eb1a6eacfa66ef26",
698	n/a	True)
699	n/a	self.check('shake_128', b"", "7f9c", True)
700	n/a
701	n/a	@requires_sha3
702	n/a	def test_case_shake128_vector(self):
703	n/a	for msg, md in read_vectors('shake_128'):
704	n/a	self.check('shake_128', msg, md, True)
705	n/a
706	n/a	@requires_sha3
707	n/a	def test_case_shake_256_0(self):
708	n/a	self.check('shake_256', b"",
709	n/a	"46b9dd2b0ba88d13233b3feb743eeb243fcd52ea62b81b82b50c27646ed5762f",
710	n/a	True)
711	n/a	self.check('shake_256', b"", "46b9", True)
712	n/a
713	n/a	@requires_sha3
714	n/a	def test_case_shake256_vector(self):
715	n/a	for msg, md in read_vectors('shake_256'):
716	n/a	self.check('shake_256', msg, md, True)
717	n/a
718	n/a	def test_gil(self):
719	n/a	# Check things work fine with an input larger than the size required
720	n/a	# for multithreaded operation (which is hardwired to 2048).
721	n/a	gil_minsize = 2048
722	n/a
723	n/a	for cons in self.hash_constructors:
724	n/a	m = cons()
725	n/a	m.update(b'1')
726	n/a	m.update(b'#' * gil_minsize)
727	n/a	m.update(b'1')
728	n/a
729	n/a	m = cons(b'x' * gil_minsize)
730	n/a	m.update(b'1')
731	n/a
732	n/a	m = hashlib.md5()
733	n/a	m.update(b'1')
734	n/a	m.update(b'#' * gil_minsize)
735	n/a	m.update(b'1')
736	n/a	self.assertEqual(m.hexdigest(), 'cb1e1a2cbc80be75e19935d621fb9b21')
737	n/a
738	n/a	m = hashlib.md5(b'x' * gil_minsize)
739	n/a	self.assertEqual(m.hexdigest(), 'cfb767f225d58469c5de3632a8803958')
740	n/a
741	n/a	@unittest.skipUnless(threading, 'Threading required for this test.')
742	n/a	@support.reap_threads
743	n/a	def test_threaded_hashing(self):
744	n/a	# Updating the same hash object from several threads at once
745	n/a	# using data chunk sizes containing the same byte sequences.
746	n/a	#
747	n/a	# If the internal locks are working to prevent multiple
748	n/a	# updates on the same object from running at once, the resulting
749	n/a	# hash will be the same as doing it single threaded upfront.
750	n/a	hasher = hashlib.sha1()
751	n/a	num_threads = 5
752	n/a	smallest_data = b'swineflu'
753	n/a	data = smallest_data*200000
754	n/a	expected_hash = hashlib.sha1(data*num_threads).hexdigest()
755	n/a
756	n/a	def hash_in_chunks(chunk_size, event):
757	n/a	index = 0
758	n/a	while index < len(data):
759	n/a	hasher.update(data[index:index+chunk_size])
760	n/a	index += chunk_size
761	n/a	event.set()
762	n/a
763	n/a	events = []
764	n/a	for threadnum in range(num_threads):
765	n/a	chunk_size = len(data) // (10**threadnum)
766	n/a	self.assertGreater(chunk_size, 0)
767	n/a	self.assertEqual(chunk_size % len(smallest_data), 0)
768	n/a	event = threading.Event()
769	n/a	events.append(event)
770	n/a	threading.Thread(target=hash_in_chunks,
771	n/a	args=(chunk_size, event)).start()
772	n/a
773	n/a	for event in events:
774	n/a	event.wait()
775	n/a
776	n/a	self.assertEqual(expected_hash, hasher.hexdigest())
777	n/a
778	n/a
779	n/a	class KDFTests(unittest.TestCase):
780	n/a
781	n/a	pbkdf2_test_vectors = [
782	n/a	(b'password', b'salt', 1, None),
783	n/a	(b'password', b'salt', 2, None),
784	n/a	(b'password', b'salt', 4096, None),
785	n/a	# too slow, it takes over a minute on a fast CPU.
786	n/a	#(b'password', b'salt', 16777216, None),
787	n/a	(b'passwordPASSWORDpassword', b'saltSALTsaltSALTsaltSALTsaltSALTsalt',
788	n/a	4096, -1),
789	n/a	(b'pass\0word', b'sa\0lt', 4096, 16),
790	n/a	]
791	n/a
792	n/a	scrypt_test_vectors = [
793	n/a	(b'', b'', 16, 1, 1, unhexlify('77d6576238657b203b19ca42c18a0497f16b4844e3074ae8dfdffa3fede21442fcd0069ded0948f8326a753a0fc81f17e8d3e0fb2e0d3628cf35e20c38d18906')),
794	n/a	(b'password', b'NaCl', 1024, 8, 16, unhexlify('fdbabe1c9d3472007856e7190d01e9fe7c6ad7cbc8237830e77376634b3731622eaf30d92e22a3886ff109279d9830dac727afb94a83ee6d8360cbdfa2cc0640')),
795	n/a	(b'pleaseletmein', b'SodiumChloride', 16384, 8, 1, unhexlify('7023bdcb3afd7348461c06cd81fd38ebfda8fbba904f8e3ea9b543f6545da1f2d5432955613f0fcf62d49705242a9af9e61e85dc0d651e40dfcf017b45575887')),
796	n/a	]
797	n/a
798	n/a	pbkdf2_results = {
799	n/a	"sha1": [
800	n/a	# official test vectors from RFC 6070
801	n/a	(bytes.fromhex('0c60c80f961f0e71f3a9b524af6012062fe037a6'), None),
802	n/a	(bytes.fromhex('ea6c014dc72d6f8ccd1ed92ace1d41f0d8de8957'), None),
803	n/a	(bytes.fromhex('4b007901b765489abead49d926f721d065a429c1'), None),
804	n/a	#(bytes.fromhex('eefe3d61cd4da4e4e9945b3d6ba2158c2634e984'), None),
805	n/a	(bytes.fromhex('3d2eec4fe41c849b80c8d83662c0e44a8b291a964c'
806	n/a	'f2f07038'), 25),
807	n/a	(bytes.fromhex('56fa6aa75548099dcc37d7f03425e0c3'), None),],
808	n/a	"sha256": [
809	n/a	(bytes.fromhex('120fb6cffcf8b32c43e7225256c4f837'
810	n/a	'a86548c92ccc35480805987cb70be17b'), None),
811	n/a	(bytes.fromhex('ae4d0c95af6b46d32d0adff928f06dd0'
812	n/a	'2a303f8ef3c251dfd6e2d85a95474c43'), None),
813	n/a	(bytes.fromhex('c5e478d59288c841aa530db6845c4c8d'
814	n/a	'962893a001ce4e11a4963873aa98134a'), None),
815	n/a	#(bytes.fromhex('cf81c66fe8cfc04d1f31ecb65dab4089'
816	n/a	# 'f7f179e89b3b0bcb17ad10e3ac6eba46'), None),
817	n/a	(bytes.fromhex('348c89dbcbd32b2f32d814b8116e84cf2b17'
818	n/a	'347ebc1800181c4e2a1fb8dd53e1c635518c7dac47e9'), 40),
819	n/a	(bytes.fromhex('89b69d0516f829893c696226650a8687'), None),],
820	n/a	"sha512": [
821	n/a	(bytes.fromhex('867f70cf1ade02cff3752599a3a53dc4af34c7a669815ae5'
822	n/a	'd513554e1c8cf252c02d470a285a0501bad999bfe943c08f'
823	n/a	'050235d7d68b1da55e63f73b60a57fce'), None),
824	n/a	(bytes.fromhex('e1d9c16aa681708a45f5c7c4e215ceb66e011a2e9f004071'
825	n/a	'3f18aefdb866d53cf76cab2868a39b9f7840edce4fef5a82'
826	n/a	'be67335c77a6068e04112754f27ccf4e'), None),
827	n/a	(bytes.fromhex('d197b1b33db0143e018b12f3d1d1479e6cdebdcc97c5c0f8'
828	n/a	'7f6902e072f457b5143f30602641b3d55cd335988cb36b84'
829	n/a	'376060ecd532e039b742a239434af2d5'), None),
830	n/a	(bytes.fromhex('8c0511f4c6e597c6ac6315d8f0362e225f3c501495ba23b8'
831	n/a	'68c005174dc4ee71115b59f9e60cd9532fa33e0f75aefe30'
832	n/a	'225c583a186cd82bd4daea9724a3d3b8'), 64),
833	n/a	(bytes.fromhex('9d9e9c4cd21fe4be24d5b8244c759665'), None),],
834	n/a	}
835	n/a
836	n/a	def _test_pbkdf2_hmac(self, pbkdf2):
837	n/a	for digest_name, results in self.pbkdf2_results.items():
838	n/a	for i, vector in enumerate(self.pbkdf2_test_vectors):
839	n/a	password, salt, rounds, dklen = vector
840	n/a	expected, overwrite_dklen = results[i]
841	n/a	if overwrite_dklen:
842	n/a	dklen = overwrite_dklen
843	n/a	out = pbkdf2(digest_name, password, salt, rounds, dklen)
844	n/a	self.assertEqual(out, expected,
845	n/a	(digest_name, password, salt, rounds, dklen))
846	n/a	out = pbkdf2(digest_name, memoryview(password),
847	n/a	memoryview(salt), rounds, dklen)
848	n/a	out = pbkdf2(digest_name, bytearray(password),
849	n/a	bytearray(salt), rounds, dklen)
850	n/a	self.assertEqual(out, expected)
851	n/a	if dklen is None:
852	n/a	out = pbkdf2(digest_name, password, salt, rounds)
853	n/a	self.assertEqual(out, expected,
854	n/a	(digest_name, password, salt, rounds))
855	n/a
856	n/a	self.assertRaises(TypeError, pbkdf2, b'sha1', b'pass', b'salt', 1)
857	n/a	self.assertRaises(TypeError, pbkdf2, 'sha1', 'pass', 'salt', 1)
858	n/a	self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', 0)
859	n/a	self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', -1)
860	n/a	self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', 1, 0)
861	n/a	self.assertRaises(ValueError, pbkdf2, 'sha1', b'pass', b'salt', 1, -1)
862	n/a	with self.assertRaisesRegex(ValueError, 'unsupported hash type'):
863	n/a	pbkdf2('unknown', b'pass', b'salt', 1)
864	n/a	out = pbkdf2(hash_name='sha1', password=b'password', salt=b'salt',
865	n/a	iterations=1, dklen=None)
866	n/a	self.assertEqual(out, self.pbkdf2_results['sha1'][0][0])
867	n/a
868	n/a	def test_pbkdf2_hmac_py(self):
869	n/a	self._test_pbkdf2_hmac(py_hashlib.pbkdf2_hmac)
870	n/a
871	n/a	@unittest.skipUnless(hasattr(c_hashlib, 'pbkdf2_hmac'),
872	n/a	' test requires OpenSSL > 1.0')
873	n/a	def test_pbkdf2_hmac_c(self):
874	n/a	self._test_pbkdf2_hmac(c_hashlib.pbkdf2_hmac)
875	n/a
876	n/a
877	n/a	@unittest.skipUnless(hasattr(c_hashlib, 'scrypt'),
878	n/a	' test requires OpenSSL > 1.1')
879	n/a	def test_scrypt(self):
880	n/a	for password, salt, n, r, p, expected in self.scrypt_test_vectors:
881	n/a	result = hashlib.scrypt(password, salt=salt, n=n, r=r, p=p)
882	n/a	self.assertEqual(result, expected)
883	n/a
884	n/a	# this values should work
885	n/a	hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=1)
886	n/a	# password and salt must be bytes-like
887	n/a	with self.assertRaises(TypeError):
888	n/a	hashlib.scrypt('password', salt=b'salt', n=2, r=8, p=1)
889	n/a	with self.assertRaises(TypeError):
890	n/a	hashlib.scrypt(b'password', salt='salt', n=2, r=8, p=1)
891	n/a	# require keyword args
892	n/a	with self.assertRaises(TypeError):
893	n/a	hashlib.scrypt(b'password')
894	n/a	with self.assertRaises(TypeError):
895	n/a	hashlib.scrypt(b'password', b'salt')
896	n/a	with self.assertRaises(TypeError):
897	n/a	hashlib.scrypt(b'password', 2, 8, 1, salt=b'salt')
898	n/a	for n in [-1, 0, 1, None]:
899	n/a	with self.assertRaises((ValueError, OverflowError, TypeError)):
900	n/a	hashlib.scrypt(b'password', salt=b'salt', n=n, r=8, p=1)
901	n/a	for r in [-1, 0, None]:
902	n/a	with self.assertRaises((ValueError, OverflowError, TypeError)):
903	n/a	hashlib.scrypt(b'password', salt=b'salt', n=2, r=r, p=1)
904	n/a	for p in [-1, 0, None]:
905	n/a	with self.assertRaises((ValueError, OverflowError, TypeError)):
906	n/a	hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=p)
907	n/a	for maxmem in [-1, None]:
908	n/a	with self.assertRaises((ValueError, OverflowError, TypeError)):
909	n/a	hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=1,
910	n/a	maxmem=maxmem)
911	n/a	for dklen in [-1, None]:
912	n/a	with self.assertRaises((ValueError, OverflowError, TypeError)):
913	n/a	hashlib.scrypt(b'password', salt=b'salt', n=2, r=8, p=1,
914	n/a	dklen=dklen)
915	n/a
916	n/a
917	n/a	if __name__ == "__main__":
918	n/a	unittest.main()