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"""passlib.tests -- unittests for passlib.crypto._md4""" #============================================================================= # imports #============================================================================= from __future__ import with_statement, division # core from binascii import hexlify import hashlib # site # pkg # module from passlib.utils.compat import bascii_to_str, PY3, u from passlib.crypto.digest import lookup_hash from passlib.tests.utils import TestCase, skipUnless # local __all__ = [ "_Common_MD4_Test", "MD4_Builtin_Test", "MD4_SSL_Test", ] #============================================================================= # test pure-python MD4 implementation #============================================================================= class _Common_MD4_Test(TestCase): """common code for testing md4 backends""" vectors = [ # input -> hex digest # test vectors from http://www.faqs.org/rfcs/rfc1320.html - A.5 (b"", "31d6cfe0d16ae931b73c59d7e0c089c0"), (b"a", "bde52cb31de33e46245e05fbdbd6fb24"), (b"abc", "a448017aaf21d8525fc10ae87aa6729d"), (b"message digest", "d9130a8164549fe818874806e1c7014b"), (b"abcdefghijklmnopqrstuvwxyz", "d79e1c308aa5bbcdeea8ed63df412da9"), (b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", "043f8582f241db351ce627e153e7f0e4"), (b"12345678901234567890123456789012345678901234567890123456789012345678901234567890", "e33b4ddc9c38f2199c3e7b164fcc0536"), ] def get_md4_const(self): """ get md4 constructor -- overridden by subclasses to use alternate backends. """ return lookup_hash("md4").const def test_attrs(self): """informational attributes""" h = self.get_md4_const()() self.assertEqual(h.name, "md4") self.assertEqual(h.digest_size, 16) self.assertEqual(h.block_size, 64) def test_md4_update(self): """update() method""" md4 = self.get_md4_const() h = md4(b'') self.assertEqual(h.hexdigest(), "31d6cfe0d16ae931b73c59d7e0c089c0") h.update(b'a') self.assertEqual(h.hexdigest(), "bde52cb31de33e46245e05fbdbd6fb24") h.update(b'bcdefghijklmnopqrstuvwxyz') self.assertEqual(h.hexdigest(), "d79e1c308aa5bbcdeea8ed63df412da9") if PY3: # reject unicode, hash should return digest of b'' h = md4() self.assertRaises(TypeError, h.update, u('a')) self.assertEqual(h.hexdigest(), "31d6cfe0d16ae931b73c59d7e0c089c0") else: # coerce unicode to ascii, hash should return digest of b'a' h = md4() h.update(u('a')) self.assertEqual(h.hexdigest(), "bde52cb31de33e46245e05fbdbd6fb24") def test_md4_hexdigest(self): """hexdigest() method""" md4 = self.get_md4_const() for input, hex in self.vectors: out = md4(input).hexdigest() self.assertEqual(out, hex) def test_md4_digest(self): """digest() method""" md4 = self.get_md4_const() for input, hex in self.vectors: out = bascii_to_str(hexlify(md4(input).digest())) self.assertEqual(out, hex) def test_md4_copy(self): """copy() method""" md4 = self.get_md4_const() h = md4(b'abc') h2 = h.copy() h2.update(b'def') self.assertEqual(h2.hexdigest(), '804e7f1c2586e50b49ac65db5b645131') h.update(b'ghi') self.assertEqual(h.hexdigest(), 'c5225580bfe176f6deeee33dee98732c') #------------------------------------------------------------------------ # create subclasses to test various backends #------------------------------------------------------------------------ def has_native_md4(): # pragma: no cover -- runtime detection """ check if hashlib natively supports md4. """ try: hashlib.new("md4") return True except ValueError: # not supported - ssl probably missing (e.g. ironpython) return False @skipUnless(has_native_md4(), "hashlib lacks ssl/md4 support") class MD4_SSL_Test(_Common_MD4_Test): descriptionPrefix = "hashlib.new('md4')" # NOTE: we trust ssl got md4 implementation right, # this is more to test our test is correct :) def setUp(self): super(MD4_SSL_Test, self).setUp() # make sure we're using right constructor. self.assertEqual(self.get_md4_const().__module__, "hashlib") class MD4_Builtin_Test(_Common_MD4_Test): descriptionPrefix = "passlib.crypto._md4.md4()" def setUp(self): super(MD4_Builtin_Test, self).setUp() if has_native_md4(): # Temporarily make lookup_hash() use builtin pure-python implementation, # by monkeypatching hashlib.new() to ensure we fall back to passlib's md4 class. orig = hashlib.new def wrapper(name, *args): if name == "md4": raise ValueError("md4 disabled for testing") return orig(name, *args) self.patchAttr(hashlib, "new", wrapper) # flush cache before & after test, since we're mucking with it. lookup_hash.clear_cache() self.addCleanup(lookup_hash.clear_cache) # make sure we're using right constructor. self.assertEqual(self.get_md4_const().__module__, "passlib.crypto._md4") #============================================================================= # eof #=============================================================================