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cpython/Lib/test/test_hashlib.py

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# 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 os
import sys
try:
import threading
except ImportError:
threading = None
import unittest
import warnings
from test import support
from test.support import _4G, bigmemtest
# Were we compiled --with-pydebug or with #define Py_DEBUG?
COMPILED_WITH_PYDEBUG = hasattr(sys, 'gettotalrefcount')
def hexstr(s):
assert isinstance(s, bytes), repr(s)
h = "0123456789abcdef"
r = ''
for i in s:
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' )
# Issue #14693: fallback modules are always compiled under POSIX
_warn_on_extension_import = os.name == 'posix' or 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 as 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.md5)
_sha1 = self._conditional_import_module('_sha1')
if _sha1:
self.constructors_to_test['sha1'].add(_sha1.sha1)
_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.values()
for cons in itertools.chain.from_iterable(constructors):
c = cons(a)
c.hexdigest()
def test_algorithms_guaranteed(self):
self.assertEqual(hashlib.algorithms_guaranteed,
set(_algo for _algo in self.supported_hash_names
if _algo.islower()))
def test_algorithms_available(self):
self.assertTrue(set(hashlib.algorithms_guaranteed).
issubset(hashlib.algorithms_available))
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)
assert isinstance(h.digest(), bytes), name
self.assertEqual(hexstr(h.digest()), h.hexdigest())
def test_large_update(self):
aas = b'a' * 128
bees = b'b' * 127
cees = b'c' * 126
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(aas + bees + cees)
self.assertEqual(m1.digest(), m2.digest())
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_no_unicode(self, algorithm_name):
# Unicode objects are not allowed as input.
constructors = self.constructors_to_test[algorithm_name]
for hash_object_constructor in constructors:
self.assertRaises(TypeError, hash_object_constructor, 'spam')
def test_no_unicode(self):
self.check_no_unicode('md5')
self.check_no_unicode('sha1')
self.check_no_unicode('sha224')
self.check_no_unicode('sha256')
self.check_no_unicode('sha384')
self.check_no_unicode('sha512')
def test_case_md5_0(self):
self.check('md5', b'', 'd41d8cd98f00b204e9800998ecf8427e')
def test_case_md5_1(self):
self.check('md5', b'abc', '900150983cd24fb0d6963f7d28e17f72')
def test_case_md5_2(self):
self.check('md5',
b'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
'd174ab98d277d9f5a5611c2c9f419d9f')
@bigmemtest(size=_4G + 5, memuse=1)
def test_case_md5_huge(self, size):
if size == _4G + 5:
try:
self.check('md5', b'A'*size, 'c9af2dff37468ce5dfee8f2cfc0a9c6d')
except OverflowError:
pass # 32-bit arch
@bigmemtest(size=_4G - 1, memuse=1)
def test_case_md5_uintmax(self, size):
if size == _4G - 1:
try:
self.check('md5', b'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', b"",
"da39a3ee5e6b4b0d3255bfef95601890afd80709")
def test_case_sha1_1(self):
self.check('sha1', b"abc",
"a9993e364706816aba3e25717850c26c9cd0d89d")
def test_case_sha1_2(self):
self.check('sha1',
b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
"84983e441c3bd26ebaae4aa1f95129e5e54670f1")
def test_case_sha1_3(self):
self.check('sha1', b"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', b"",
"d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f")
def test_case_sha224_1(self):
self.check('sha224', b"abc",
"23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7")
def test_case_sha224_2(self):
self.check('sha224',
b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
"75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525")
def test_case_sha224_3(self):
self.check('sha224', b"a" * 1000000,
"20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67")
def test_case_sha256_0(self):
self.check('sha256', b"",
"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
def test_case_sha256_1(self):
self.check('sha256', b"abc",
"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
def test_case_sha256_2(self):
self.check('sha256',
b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1")
def test_case_sha256_3(self):
self.check('sha256', b"a" * 1000000,
"cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0")
def test_case_sha384_0(self):
self.check('sha384', b"",
"38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da"+
"274edebfe76f65fbd51ad2f14898b95b")
def test_case_sha384_1(self):
self.check('sha384', b"abc",
"cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"+
"8086072ba1e7cc2358baeca134c825a7")
def test_case_sha384_2(self):
self.check('sha384',
b"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
b"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
"09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"+
"fcc7c71a557e2db966c3e9fa91746039")
def test_case_sha384_3(self):
self.check('sha384', b"a" * 1000000,
"9d0e1809716474cb086e834e310a4a1ced149e9c00f248527972cec5704c2a5b"+
"07b8b3dc38ecc4ebae97ddd87f3d8985")
def test_case_sha512_0(self):
self.check('sha512', b"",
"cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce"+
"47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e")
def test_case_sha512_1(self):
self.check('sha512', b"abc",
"ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"+
"2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")
def test_case_sha512_2(self):
self.check('sha512',
b"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
b"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
"8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"+
"501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909")
def test_case_sha512_3(self):
self.check('sha512', b"a" * 1000000,
"e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"+
"de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b")
def test_gil(self):
# Check things work fine with an input larger than the size required
# for multithreaded operation (which is hardwired to 2048).
gil_minsize = 2048
m = hashlib.md5()
m.update(b'1')
m.update(b'#' * gil_minsize)
m.update(b'1')
self.assertEqual(m.hexdigest(), 'cb1e1a2cbc80be75e19935d621fb9b21')
m = hashlib.md5(b'x' * gil_minsize)
self.assertEqual(m.hexdigest(), 'cfb767f225d58469c5de3632a8803958')
@unittest.skipUnless(threading, 'Threading required for this 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 = b'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 range(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():
support.run_unittest(HashLibTestCase)
if __name__ == "__main__":
test_main()
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