# 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_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_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") def test_threaded_hashing(self): if not threading: raise unittest.SkipTest('No threading module.') # 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()) @test_support.reap_threads def test_main(): test_support.run_unittest(HashLibTestCase) if __name__ == "__main__": test_main()