# Test hashlib module | |
# | |
# $Id$ | |
# | |
# Copyright (C) 2005-2010 Gregory P. Smith (greg@krypto.org) | |
# Licensed to PSF under a Contributor Agreement. | |
# | |
import array | |
import hashlib | |
import itertools | |
import sys | |
try: | |
import threading | |
except ImportError: | |
threading = None | |
import unittest | |
import warnings | |
from test import test_support | |
from test.test_support import _4G, precisionbigmemtest | |
# Were we compiled --with-pydebug or with #define Py_DEBUG? | |
COMPILED_WITH_PYDEBUG = hasattr(sys, 'gettotalrefcount') | |
def hexstr(s): | |
import string | |
h = string.hexdigits | |
r = '' | |
for c in s: | |
i = ord(c) | |
r = r + h[(i >> 4) & 0xF] + h[i & 0xF] | |
return r | |
class HashLibTestCase(unittest.TestCase): | |
supported_hash_names = ( 'md5', 'MD5', 'sha1', 'SHA1', | |
'sha224', 'SHA224', 'sha256', 'SHA256', | |
'sha384', 'SHA384', 'sha512', 'SHA512' ) | |
_warn_on_extension_import = COMPILED_WITH_PYDEBUG | |
def _conditional_import_module(self, module_name): | |
"""Import a module and return a reference to it or None on failure.""" | |
try: | |
exec('import '+module_name) | |
except ImportError, error: | |
if self._warn_on_extension_import: | |
warnings.warn('Did a C extension fail to compile? %s' % error) | |
return locals().get(module_name) | |
def __init__(self, *args, **kwargs): | |
algorithms = set() | |
for algorithm in self.supported_hash_names: | |
algorithms.add(algorithm.lower()) | |
self.constructors_to_test = {} | |
for algorithm in algorithms: | |
self.constructors_to_test[algorithm] = set() | |
# For each algorithm, test the direct constructor and the use | |
# of hashlib.new given the algorithm name. | |
for algorithm, constructors in self.constructors_to_test.items(): | |
constructors.add(getattr(hashlib, algorithm)) | |
def _test_algorithm_via_hashlib_new(data=None, _alg=algorithm): | |
if data is None: | |
return hashlib.new(_alg) | |
return hashlib.new(_alg, data) | |
constructors.add(_test_algorithm_via_hashlib_new) | |
_hashlib = self._conditional_import_module('_hashlib') | |
if _hashlib: | |
# These two algorithms should always be present when this module | |
# is compiled. If not, something was compiled wrong. | |
assert hasattr(_hashlib, 'openssl_md5') | |
assert hasattr(_hashlib, 'openssl_sha1') | |
for algorithm, constructors in self.constructors_to_test.items(): | |
constructor = getattr(_hashlib, 'openssl_'+algorithm, None) | |
if constructor: | |
constructors.add(constructor) | |
_md5 = self._conditional_import_module('_md5') | |
if _md5: | |
self.constructors_to_test['md5'].add(_md5.new) | |
_sha = self._conditional_import_module('_sha') | |
if _sha: | |
self.constructors_to_test['sha1'].add(_sha.new) | |
_sha256 = self._conditional_import_module('_sha256') | |
if _sha256: | |
self.constructors_to_test['sha224'].add(_sha256.sha224) | |
self.constructors_to_test['sha256'].add(_sha256.sha256) | |
_sha512 = self._conditional_import_module('_sha512') | |
if _sha512: | |
self.constructors_to_test['sha384'].add(_sha512.sha384) | |
self.constructors_to_test['sha512'].add(_sha512.sha512) | |
super(HashLibTestCase, self).__init__(*args, **kwargs) | |
def test_hash_array(self): | |
a = array.array("b", range(10)) | |
constructors = self.constructors_to_test.itervalues() | |
for cons in itertools.chain.from_iterable(constructors): | |
c = cons(a) | |
c.hexdigest() | |
def test_algorithms_attribute(self): | |
self.assertEqual(hashlib.algorithms, | |
tuple([_algo for _algo in self.supported_hash_names if | |
_algo.islower()])) | |
def test_unknown_hash(self): | |
try: | |
hashlib.new('spam spam spam spam spam') | |
except ValueError: | |
pass | |
else: | |
self.assertTrue(0 == "hashlib didn't reject bogus hash name") | |
def test_get_builtin_constructor(self): | |
get_builtin_constructor = hashlib.__dict__[ | |
'__get_builtin_constructor'] | |
self.assertRaises(ValueError, get_builtin_constructor, 'test') | |
try: | |
import _md5 | |
except ImportError: | |
pass | |
# This forces an ImportError for "import _md5" statements | |
sys.modules['_md5'] = None | |
try: | |
self.assertRaises(ValueError, get_builtin_constructor, 'md5') | |
finally: | |
if '_md5' in locals(): | |
sys.modules['_md5'] = _md5 | |
else: | |
del sys.modules['_md5'] | |
def test_hexdigest(self): | |
for name in self.supported_hash_names: | |
h = hashlib.new(name) | |
self.assertTrue(hexstr(h.digest()) == h.hexdigest()) | |
def test_large_update(self): | |
aas = 'a' * 128 | |
bees = 'b' * 127 | |
cees = 'c' * 126 | |
abcs = aas + bees + cees | |
for name in self.supported_hash_names: | |
m1 = hashlib.new(name) | |
m1.update(aas) | |
m1.update(bees) | |
m1.update(cees) | |
m2 = hashlib.new(name) | |
m2.update(abcs) | |
self.assertEqual(m1.digest(), m2.digest(), name+' update problem.') | |
m3 = hashlib.new(name, abcs) | |
self.assertEqual(m1.digest(), m3.digest(), name+' new problem.') | |
def check(self, name, data, digest): | |
constructors = self.constructors_to_test[name] | |
# 2 is for hashlib.name(...) and hashlib.new(name, ...) | |
self.assertGreaterEqual(len(constructors), 2) | |
for hash_object_constructor in constructors: | |
computed = hash_object_constructor(data).hexdigest() | |
self.assertEqual( | |
computed, digest, | |
"Hash algorithm %s constructed using %s returned hexdigest" | |
" %r for %d byte input data that should have hashed to %r." | |
% (name, hash_object_constructor, | |
computed, len(data), digest)) | |
def check_unicode(self, algorithm_name): | |
# Unicode objects are not allowed as input. | |
expected = hashlib.new(algorithm_name, str(u'spam')).hexdigest() | |
self.check(algorithm_name, u'spam', expected) | |
def test_unicode(self): | |
# In python 2.x unicode is auto-encoded to the system default encoding | |
# when passed to hashlib functions. | |
self.check_unicode('md5') | |
self.check_unicode('sha1') | |
self.check_unicode('sha224') | |
self.check_unicode('sha256') | |
self.check_unicode('sha384') | |
self.check_unicode('sha512') | |
def test_case_md5_0(self): | |
self.check('md5', '', 'd41d8cd98f00b204e9800998ecf8427e') | |
def test_case_md5_1(self): | |
self.check('md5', 'abc', '900150983cd24fb0d6963f7d28e17f72') | |
def test_case_md5_2(self): | |
self.check('md5', 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789', | |
'd174ab98d277d9f5a5611c2c9f419d9f') | |
@precisionbigmemtest(size=_4G + 5, memuse=1) | |
def test_case_md5_huge(self, size): | |
if size == _4G + 5: | |
try: | |
self.check('md5', 'A'*size, 'c9af2dff37468ce5dfee8f2cfc0a9c6d') | |
except OverflowError: | |
pass # 32-bit arch | |
@precisionbigmemtest(size=_4G - 1, memuse=1) | |
def test_case_md5_uintmax(self, size): | |
if size == _4G - 1: | |
try: | |
self.check('md5', 'A'*size, '28138d306ff1b8281f1a9067e1a1a2b3') | |
except OverflowError: | |
pass # 32-bit arch | |
# use the three examples from Federal Information Processing Standards | |
# Publication 180-1, Secure Hash Standard, 1995 April 17 | |
# http://www.itl.nist.gov/div897/pubs/fip180-1.htm | |
def test_case_sha1_0(self): | |
self.check('sha1', "", | |
"da39a3ee5e6b4b0d3255bfef95601890afd80709") | |
def test_case_sha1_1(self): | |
self.check('sha1', "abc", | |
"a9993e364706816aba3e25717850c26c9cd0d89d") | |
def test_case_sha1_2(self): | |
self.check('sha1', "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", | |
"84983e441c3bd26ebaae4aa1f95129e5e54670f1") | |
def test_case_sha1_3(self): | |
self.check('sha1', "a" * 1000000, | |
"34aa973cd4c4daa4f61eeb2bdbad27316534016f") | |
# use the examples from Federal Information Processing Standards | |
# Publication 180-2, Secure Hash Standard, 2002 August 1 | |
# http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf | |
def test_case_sha224_0(self): | |
self.check('sha224', "", | |
"d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f") | |
def test_case_sha224_1(self): | |
self.check('sha224', "abc", | |
"23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7") | |
def test_case_sha224_2(self): | |
self.check('sha224', | |
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", | |
"75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525") | |
def test_case_sha224_3(self): | |
self.check('sha224', "a" * 1000000, | |
"20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67") | |
def test_case_sha256_0(self): | |
self.check('sha256', "", | |
"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855") | |
def test_case_sha256_1(self): | |
self.check('sha256', "abc", | |
"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad") | |
def test_case_sha256_2(self): | |
self.check('sha256', | |
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", | |
"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1") | |
def test_case_sha256_3(self): | |
self.check('sha256', "a" * 1000000, | |
"cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0") | |
def test_case_sha384_0(self): | |
self.check('sha384', "", | |
"38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da"+ | |
"274edebfe76f65fbd51ad2f14898b95b") | |
def test_case_sha384_1(self): | |
self.check('sha384', "abc", | |
"cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"+ | |
"8086072ba1e7cc2358baeca134c825a7") | |
def test_case_sha384_2(self): | |
self.check('sha384', | |
"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+ | |
"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", | |
"09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"+ | |
"fcc7c71a557e2db966c3e9fa91746039") | |
def test_case_sha384_3(self): | |
self.check('sha384', "a" * 1000000, | |
"9d0e1809716474cb086e834e310a4a1ced149e9c00f248527972cec5704c2a5b"+ | |
"07b8b3dc38ecc4ebae97ddd87f3d8985") | |
def test_case_sha512_0(self): | |
self.check('sha512', "", | |
"cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce"+ | |
"47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e") | |
def test_case_sha512_1(self): | |
self.check('sha512', "abc", | |
"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"+ | |
"2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f") | |
def test_case_sha512_2(self): | |
self.check('sha512', | |
"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+ | |
"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", | |
"8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"+ | |
"501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909") | |
def test_case_sha512_3(self): | |
self.check('sha512', "a" * 1000000, | |
"e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"+ | |
"de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b") | |
@unittest.skipUnless(threading, 'Threading required for this test.') | |
@test_support.reap_threads | |
def test_threaded_hashing(self): | |
# Updating the same hash object from several threads at once | |
# using data chunk sizes containing the same byte sequences. | |
# | |
# If the internal locks are working to prevent multiple | |
# updates on the same object from running at once, the resulting | |
# hash will be the same as doing it single threaded upfront. | |
hasher = hashlib.sha1() | |
num_threads = 5 | |
smallest_data = 'swineflu' | |
data = smallest_data*200000 | |
expected_hash = hashlib.sha1(data*num_threads).hexdigest() | |
def hash_in_chunks(chunk_size, event): | |
index = 0 | |
while index < len(data): | |
hasher.update(data[index:index+chunk_size]) | |
index += chunk_size | |
event.set() | |
events = [] | |
for threadnum in xrange(num_threads): | |
chunk_size = len(data) // (10**threadnum) | |
assert chunk_size > 0 | |
assert chunk_size % len(smallest_data) == 0 | |
event = threading.Event() | |
events.append(event) | |
threading.Thread(target=hash_in_chunks, | |
args=(chunk_size, event)).start() | |
for event in events: | |
event.wait() | |
self.assertEqual(expected_hash, hasher.hexdigest()) | |
def test_main(): | |
test_support.run_unittest(HashLibTestCase) | |
if __name__ == "__main__": | |
test_main() |