235 lines
8.4 KiB
Python
235 lines
8.4 KiB
Python
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# -*- 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 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 Crypto.Util.py3compat import b, tobytes
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from Crypto.Util.strxor import strxor_c
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class HashDigestSizeSelfTest(unittest.TestCase):
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def __init__(self, hashmod, description, expected):
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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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def shortDescription(self):
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return self.description
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def runTest(self):
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self.assertTrue(hasattr(self.hashmod, "digest_size"))
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self.assertEqual(self.hashmod.digest_size, self.expected)
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h = self.hashmod.new()
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self.assertTrue(hasattr(h, "digest_size"))
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self.assertEqual(h.digest_size, self.expected)
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class HashSelfTest(unittest.TestCase):
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def __init__(self, hashmod, description, expected, input):
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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.input = input
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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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h = self.hashmod.new()
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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)
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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):
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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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def runTest(self):
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h = self.hashmod.new()
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self.assertEqual(h.oid, self.oid)
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class HashDocStringTest(unittest.TestCase):
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def __init__(self, hashmod):
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unittest.TestCase.__init__(self)
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self.hashmod = hashmod
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def runTest(self):
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docstring = self.hashmod.__doc__
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self.assertTrue(hasattr(self.hashmod, '__doc__'))
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self.assertTrue(isinstance(self.hashmod.__doc__, str))
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class GenericHashConstructorTest(unittest.TestCase):
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def __init__(self, hashmod):
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unittest.TestCase.__init__(self)
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self.hashmod = hashmod
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def runTest(self):
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obj1 = self.hashmod.new("foo")
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obj2 = self.hashmod.new()
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obj3 = Crypto.Hash.new(obj1.name, "foo")
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obj4 = Crypto.Hash.new(obj1.name)
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obj5 = Crypto.Hash.new(obj1, "foo")
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obj6 = Crypto.Hash.new(obj1)
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self.assertTrue(isinstance(self.hashmod, obj1))
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self.assertTrue(isinstance(self.hashmod, obj2))
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self.assertTrue(isinstance(self.hashmod, obj3))
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self.assertTrue(isinstance(self.hashmod, obj4))
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self.assertTrue(isinstance(self.hashmod, obj5))
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self.assertTrue(isinstance(self.hashmod, obj6))
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class MACSelfTest(unittest.TestCase):
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def __init__(self, module, description, result, input, key, params):
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unittest.TestCase.__init__(self)
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self.module = module
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self.result = result
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self.input = input
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self.key = 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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key = binascii.a2b_hex(b(self.key))
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data = binascii.a2b_hex(b(self.input))
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# Strip whitespace from the expected string (which should be in lowercase-hex)
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expected = b("".join(self.result.split()))
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h = self.module.new(key, **self.params)
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h.update(data)
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out1_bin = h.digest()
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out1 = binascii.b2a_hex(h.digest())
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out2 = h.hexdigest()
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# Verify that correct MAC does not raise any exception
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h.hexverify(out1)
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h.verify(out1_bin)
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# Verify that incorrect MAC does raise ValueError exception
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wrong_mac = strxor_c(out1_bin, 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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h = self.module.new(key, data, **self.params)
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out3 = h.hexdigest()
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out4 = binascii.b2a_hex(h.digest())
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# Test .copy()
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h2 = h.copy()
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h.update(b("blah blah blah")) # Corrupt the original hash object
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out5 = binascii.b2a_hex(h2.digest()) # The copied hash object should return the correct result
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# PY3K: Check that hexdigest() returns str and digest() returns bytes
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if sys.version_info[0] > 2:
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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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if sys.version_info[0] > 2:
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h.hexverify(h.hexdigest())
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h.hexverify(h.hexdigest().encode('ascii'))
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# PY3K: hexdigest() should return str, and digest() should return bytes
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self.assertEqual(expected, out1)
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if sys.version_info[0] == 2:
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self.assertEqual(expected, out2)
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self.assertEqual(expected, out3)
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else:
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self.assertEqual(expected.decode(), out2)
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self.assertEqual(expected.decode(), out3)
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self.assertEqual(expected, out4)
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self.assertEqual(expected, out5)
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def make_hash_tests(module, module_name, test_data, digest_size, oid=None):
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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) = list(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))
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name = "%s #%d: digest_size" % (module_name, i+1)
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tests.append(HashDigestSizeSelfTest(module, name, digest_size))
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if oid is not None:
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tests.append(HashTestOID(module, oid))
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tests.append(HashDocStringTest(module))
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if getattr(module, 'name', None) is not None:
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tests.append(GenericHashConstructorTest(module))
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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 in range(len(test_data)):
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row = test_data[i]
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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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