292 lines
9.7 KiB
Python
292 lines
9.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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# SelfTest/Hash/common.py: Common code for Crypto.SelfTest.Hash
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#
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# Written in 2008 by Dwayne C. Litzenberger <dlitz@dlitz.net>
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#
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# ===================================================================
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# The contents of this file are dedicated to the public domain. To
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# the extent that dedication to the public domain is not available,
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# everyone is granted a worldwide, perpetual, royalty-free,
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# non-exclusive license to exercise all rights associated with the
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# contents of this file for any purpose whatsoever.
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# No rights are reserved.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# ===================================================================
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"""Self-testing for PyCrypto hash modules"""
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import re
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import sys
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import unittest
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import binascii
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import Crypto.Hash
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from binascii import hexlify, unhexlify
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from Crypto.Util.py3compat import b, tobytes
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from Crypto.Util.strxor import strxor_c
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def t2b(hex_string):
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shorter = re.sub(br'\s+', b'', tobytes(hex_string))
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return unhexlify(shorter)
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class HashDigestSizeSelfTest(unittest.TestCase):
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def __init__(self, hashmod, description, expected, extra_params):
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unittest.TestCase.__init__(self)
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self.hashmod = hashmod
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self.expected = expected
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self.description = description
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self.extra_params = extra_params
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def shortDescription(self):
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return self.description
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def runTest(self):
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if "truncate" not in self.extra_params:
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self.failUnless(hasattr(self.hashmod, "digest_size"))
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self.assertEquals(self.hashmod.digest_size, self.expected)
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h = self.hashmod.new(**self.extra_params)
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self.failUnless(hasattr(h, "digest_size"))
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self.assertEquals(h.digest_size, self.expected)
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class HashSelfTest(unittest.TestCase):
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def __init__(self, hashmod, description, expected, input, extra_params):
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unittest.TestCase.__init__(self)
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self.hashmod = hashmod
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self.expected = expected.lower()
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self.input = input
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self.description = description
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self.extra_params = extra_params
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def shortDescription(self):
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return self.description
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def runTest(self):
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h = self.hashmod.new(**self.extra_params)
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h.update(self.input)
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out1 = binascii.b2a_hex(h.digest())
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out2 = h.hexdigest()
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h = self.hashmod.new(self.input, **self.extra_params)
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out3 = h.hexdigest()
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out4 = binascii.b2a_hex(h.digest())
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# PY3K: hexdigest() should return str(), and digest() bytes
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self.assertEqual(self.expected, out1) # h = .new(); h.update(data); h.digest()
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if sys.version_info[0] == 2:
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self.assertEqual(self.expected, out2) # h = .new(); h.update(data); h.hexdigest()
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self.assertEqual(self.expected, out3) # h = .new(data); h.hexdigest()
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else:
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self.assertEqual(self.expected.decode(), out2) # h = .new(); h.update(data); h.hexdigest()
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self.assertEqual(self.expected.decode(), out3) # h = .new(data); h.hexdigest()
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self.assertEqual(self.expected, out4) # h = .new(data); h.digest()
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# Verify that the .new() method produces a fresh hash object, except
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# for MD5 and SHA1, which are hashlib objects. (But test any .new()
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# method that does exist.)
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if self.hashmod.__name__ not in ('Crypto.Hash.MD5', 'Crypto.Hash.SHA1') or hasattr(h, 'new'):
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h2 = h.new()
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h2.update(self.input)
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out5 = binascii.b2a_hex(h2.digest())
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self.assertEqual(self.expected, out5)
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class HashTestOID(unittest.TestCase):
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def __init__(self, hashmod, oid, extra_params):
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unittest.TestCase.__init__(self)
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self.hashmod = hashmod
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self.oid = oid
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self.extra_params = extra_params
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def runTest(self):
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h = self.hashmod.new(**self.extra_params)
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self.assertEqual(h.oid, self.oid)
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class ByteArrayTest(unittest.TestCase):
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def __init__(self, module, extra_params):
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unittest.TestCase.__init__(self)
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self.module = module
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self.extra_params = extra_params
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def runTest(self):
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data = b("\x00\x01\x02")
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# Data can be a bytearray (during initialization)
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ba = bytearray(data)
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h1 = self.module.new(data, **self.extra_params)
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h2 = self.module.new(ba, **self.extra_params)
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ba[:1] = b'\xFF'
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self.assertEqual(h1.digest(), h2.digest())
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# Data can be a bytearray (during operation)
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ba = bytearray(data)
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h1 = self.module.new(**self.extra_params)
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h2 = self.module.new(**self.extra_params)
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h1.update(data)
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h2.update(ba)
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ba[:1] = b'\xFF'
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self.assertEqual(h1.digest(), h2.digest())
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class MemoryViewTest(unittest.TestCase):
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def __init__(self, module, extra_params):
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unittest.TestCase.__init__(self)
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self.module = module
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self.extra_params = extra_params
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def runTest(self):
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data = b"\x00\x01\x02"
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def get_mv_ro(data):
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return memoryview(data)
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def get_mv_rw(data):
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return memoryview(bytearray(data))
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for get_mv in get_mv_ro, get_mv_rw:
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# Data can be a memoryview (during initialization)
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mv = get_mv(data)
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h1 = self.module.new(data, **self.extra_params)
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h2 = self.module.new(mv, **self.extra_params)
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if not mv.readonly:
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mv[:1] = b'\xFF'
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self.assertEqual(h1.digest(), h2.digest())
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# Data can be a memoryview (during operation)
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mv = get_mv(data)
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h1 = self.module.new(**self.extra_params)
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h2 = self.module.new(**self.extra_params)
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h1.update(data)
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h2.update(mv)
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if not mv.readonly:
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mv[:1] = b'\xFF'
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self.assertEqual(h1.digest(), h2.digest())
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class MACSelfTest(unittest.TestCase):
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def __init__(self, module, description, result, data, key, params):
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unittest.TestCase.__init__(self)
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self.module = module
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self.result = t2b(result)
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self.data = t2b(data)
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self.key = t2b(key)
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self.params = params
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self.description = description
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def shortDescription(self):
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return self.description
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def runTest(self):
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result_hex = hexlify(self.result)
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# Verify result
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h = self.module.new(self.key, **self.params)
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h.update(self.data)
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self.assertEqual(self.result, h.digest())
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self.assertEqual(hexlify(self.result).decode('ascii'), h.hexdigest())
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# Verify that correct MAC does not raise any exception
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h.verify(self.result)
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h.hexverify(result_hex)
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# Verify that incorrect MAC does raise ValueError exception
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wrong_mac = strxor_c(self.result, 255)
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self.assertRaises(ValueError, h.verify, wrong_mac)
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self.assertRaises(ValueError, h.hexverify, "4556")
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# Verify again, with data passed to new()
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h = self.module.new(self.key, self.data, **self.params)
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self.assertEqual(self.result, h.digest())
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self.assertEqual(hexlify(self.result).decode('ascii'), h.hexdigest())
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# Test .copy()
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try:
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h = self.module.new(self.key, self.data, **self.params)
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h2 = h.copy()
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h3 = h.copy()
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# Verify that changing the copy does not change the original
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h2.update(b"bla")
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self.assertEqual(h3.digest(), self.result)
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# Verify that both can reach the same state
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h.update(b"bla")
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self.assertEqual(h.digest(), h2.digest())
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except NotImplementedError:
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pass
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# PY3K: Check that hexdigest() returns str and digest() returns bytes
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self.assertTrue(isinstance(h.digest(), type(b"")))
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self.assertTrue(isinstance(h.hexdigest(), type("")))
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# PY3K: Check that .hexverify() accepts bytes or str
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h.hexverify(h.hexdigest())
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h.hexverify(h.hexdigest().encode('ascii'))
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def make_hash_tests(module, module_name, test_data, digest_size, oid=None,
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extra_params={}):
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tests = []
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for i in range(len(test_data)):
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row = test_data[i]
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(expected, input) = map(tobytes,row[0:2])
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if len(row) < 3:
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description = repr(input)
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else:
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description = row[2]
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name = "%s #%d: %s" % (module_name, i+1, description)
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tests.append(HashSelfTest(module, name, expected, input, extra_params))
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name = "%s #%d: digest_size" % (module_name, i+1)
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tests.append(HashDigestSizeSelfTest(module, name, digest_size, extra_params))
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if oid is not None:
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tests.append(HashTestOID(module, oid, extra_params))
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tests.append(ByteArrayTest(module, extra_params))
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if not (sys.version_info[0] == 2 and sys.version_info[1] < 7):
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tests.append(MemoryViewTest(module, extra_params))
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return tests
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def make_mac_tests(module, module_name, test_data):
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tests = []
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for i, row in enumerate(test_data):
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if len(row) == 4:
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(key, data, results, description, params) = list(row) + [ {} ]
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else:
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(key, data, results, description, params) = row
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name = "%s #%d: %s" % (module_name, i+1, description)
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tests.append(MACSelfTest(module, name, results, data, key, params))
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return tests
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# vim:set ts=4 sw=4 sts=4 expandtab:
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