1 import hmac

     2 import hashlib

     3 import unittest

     4 import warnings

     5 from test import test_support

     6 

     7 class TestVectorsTestCase(unittest.TestCase):

     8 

     9     def test_md5_vectors(self):

    10         # Test the HMAC module against test vectors from the RFC.

    11 

    12         def md5test(key, data, digest):

    13             h = hmac.HMAC(key, data)

    14             self.assertEqual(h.hexdigest().upper(), digest.upper())

    15 

    16         md5test(chr(0x0b) * 16,

    17                 "Hi There",

    18                 "9294727A3638BB1C13F48EF8158BFC9D")

    19 

    20         md5test("Jefe",

    21                 "what do ya want for nothing?",

    22                 "750c783e6ab0b503eaa86e310a5db738")

    23 

    24         md5test(chr(0xAA)*16,

    25                 chr(0xDD)*50,

    26                 "56be34521d144c88dbb8c733f0e8b3f6")

    27 

    28         md5test("".join([chr(i) for i in range(1, 26)]),

    29                 chr(0xCD) * 50,

    30                 "697eaf0aca3a3aea3a75164746ffaa79")

    31 

    32         md5test(chr(0x0C) * 16,

    33                 "Test With Truncation",

    34                 "56461ef2342edc00f9bab995690efd4c")

    35 

    36         md5test(chr(0xAA) * 80,

    37                 "Test Using Larger Than Block-Size Key - Hash Key First",

    38                 "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd")

    39 

    40         md5test(chr(0xAA) * 80,

    41                 ("Test Using Larger Than Block-Size Key "

    42                  "and Larger Than One Block-Size Data"),

    43                 "6f630fad67cda0ee1fb1f562db3aa53e")

    44 

    45     def test_sha_vectors(self):

    46         def shatest(key, data, digest):

    47             h = hmac.HMAC(key, data, digestmod=hashlib.sha1)

    48             self.assertEqual(h.hexdigest().upper(), digest.upper())

    49 

    50         shatest(chr(0x0b) * 20,

    51                 "Hi There",

    52                 "b617318655057264e28bc0b6fb378c8ef146be00")

    53 

    54         shatest("Jefe",

    55                 "what do ya want for nothing?",

    56                 "effcdf6ae5eb2fa2d27416d5f184df9c259a7c79")

    57 

    58         shatest(chr(0xAA)*20,

    59                 chr(0xDD)*50,

    60                 "125d7342b9ac11cd91a39af48aa17b4f63f175d3")

    61 

    62         shatest("".join([chr(i) for i in range(1, 26)]),

    63                 chr(0xCD) * 50,

    64                 "4c9007f4026250c6bc8414f9bf50c86c2d7235da")

    65 

    66         shatest(chr(0x0C) * 20,

    67                 "Test With Truncation",

    68                 "4c1a03424b55e07fe7f27be1d58bb9324a9a5a04")

    69 

    70         shatest(chr(0xAA) * 80,

    71                 "Test Using Larger Than Block-Size Key - Hash Key First",

    72                 "aa4ae5e15272d00e95705637ce8a3b55ed402112")

    73 

    74         shatest(chr(0xAA) * 80,

    75                 ("Test Using Larger Than Block-Size Key "

    76                  "and Larger Than One Block-Size Data"),

    77                 "e8e99d0f45237d786d6bbaa7965c7808bbff1a91")

    78 

    79     def _rfc4231_test_cases(self, hashfunc):

    80         def hmactest(key, data, hexdigests):

    81             h = hmac.HMAC(key, data, digestmod=hashfunc)

    82             self.assertEqual(h.hexdigest().lower(), hexdigests[hashfunc])

    83 

    84         # 4.2.  Test Case 1

    85         hmactest(key = '\x0b'*20,

    86                  data = 'Hi There',

    87                  hexdigests = {

    88                    hashlib.sha224: '896fb1128abbdf196832107cd49df33f'

    89                                    '47b4b1169912ba4f53684b22',

    90                    hashlib.sha256: 'b0344c61d8db38535ca8afceaf0bf12b'

    91                                    '881dc200c9833da726e9376c2e32cff7',

    92                    hashlib.sha384: 'afd03944d84895626b0825f4ab46907f'

    93                                    '15f9dadbe4101ec682aa034c7cebc59c'

    94                                    'faea9ea9076ede7f4af152e8b2fa9cb6',

    95                    hashlib.sha512: '87aa7cdea5ef619d4ff0b4241a1d6cb0'

    96                                    '2379f4e2ce4ec2787ad0b30545e17cde'

    97                                    'daa833b7d6b8a702038b274eaea3f4e4'

    98                                    'be9d914eeb61f1702e696c203a126854',

    99                  })

   100 

   101         # 4.3.  Test Case 2

   102         hmactest(key = 'Jefe',

   103                  data = 'what do ya want for nothing?',

   104                  hexdigests = {

   105                    hashlib.sha224: 'a30e01098bc6dbbf45690f3a7e9e6d0f'

   106                                    '8bbea2a39e6148008fd05e44',

   107                    hashlib.sha256: '5bdcc146bf60754e6a042426089575c7'

   108                                    '5a003f089d2739839dec58b964ec3843',

   109                    hashlib.sha384: 'af45d2e376484031617f78d2b58a6b1b'

   110                                    '9c7ef464f5a01b47e42ec3736322445e'

   111                                    '8e2240ca5e69e2c78b3239ecfab21649',

   112                    hashlib.sha512: '164b7a7bfcf819e2e395fbe73b56e0a3'

   113                                    '87bd64222e831fd610270cd7ea250554'

   114                                    '9758bf75c05a994a6d034f65f8f0e6fd'

   115                                    'caeab1a34d4a6b4b636e070a38bce737',

   116                  })

   117 

   118         # 4.4.  Test Case 3

   119         hmactest(key = '\xaa'*20,

   120                  data = '\xdd'*50,

   121                  hexdigests = {

   122                    hashlib.sha224: '7fb3cb3588c6c1f6ffa9694d7d6ad264'

   123                                    '9365b0c1f65d69d1ec8333ea',

   124                    hashlib.sha256: '773ea91e36800e46854db8ebd09181a7'

   125                                    '2959098b3ef8c122d9635514ced565fe',

   126                    hashlib.sha384: '88062608d3e6ad8a0aa2ace014c8a86f'

   127                                    '0aa635d947ac9febe83ef4e55966144b'

   128                                    '2a5ab39dc13814b94e3ab6e101a34f27',

   129                    hashlib.sha512: 'fa73b0089d56a284efb0f0756c890be9'

   130                                    'b1b5dbdd8ee81a3655f83e33b2279d39'

   131                                    'bf3e848279a722c806b485a47e67c807'

   132                                    'b946a337bee8942674278859e13292fb',

   133                  })

   134 

   135         # 4.5.  Test Case 4

   136         hmactest(key = ''.join([chr(x) for x in xrange(0x01, 0x19+1)]),

   137                  data = '\xcd'*50,

   138                  hexdigests = {

   139                    hashlib.sha224: '6c11506874013cac6a2abc1bb382627c'

   140                                    'ec6a90d86efc012de7afec5a',

   141                    hashlib.sha256: '82558a389a443c0ea4cc819899f2083a'

   142                                    '85f0faa3e578f8077a2e3ff46729665b',

   143                    hashlib.sha384: '3e8a69b7783c25851933ab6290af6ca7'

   144                                    '7a9981480850009cc5577c6e1f573b4e'

   145                                    '6801dd23c4a7d679ccf8a386c674cffb',

   146                    hashlib.sha512: 'b0ba465637458c6990e5a8c5f61d4af7'

   147                                    'e576d97ff94b872de76f8050361ee3db'

   148                                    'a91ca5c11aa25eb4d679275cc5788063'

   149                                    'a5f19741120c4f2de2adebeb10a298dd',

   150                  })

   151 

   152         # 4.7.  Test Case 6

   153         hmactest(key = '\xaa'*131,

   154                  data = 'Test Using Larger Than Block-Siz'

   155                         'e Key - Hash Key First',

   156                  hexdigests = {

   157                    hashlib.sha224: '95e9a0db962095adaebe9b2d6f0dbce2'

   158                                    'd499f112f2d2b7273fa6870e',

   159                    hashlib.sha256: '60e431591ee0b67f0d8a26aacbf5b77f'

   160                                    '8e0bc6213728c5140546040f0ee37f54',

   161                    hashlib.sha384: '4ece084485813e9088d2c63a041bc5b4'

   162                                    '4f9ef1012a2b588f3cd11f05033ac4c6'

   163                                    '0c2ef6ab4030fe8296248df163f44952',

   164                    hashlib.sha512: '80b24263c7c1a3ebb71493c1dd7be8b4'

   165                                    '9b46d1f41b4aeec1121b013783f8f352'

   166                                    '6b56d037e05f2598bd0fd2215d6a1e52'

   167                                    '95e64f73f63f0aec8b915a985d786598',

   168                  })

   169 

   170         # 4.8.  Test Case 7

   171         hmactest(key = '\xaa'*131,

   172                  data = 'This is a test using a larger th'

   173                         'an block-size key and a larger t'

   174                         'han block-size data. The key nee'

   175                         'ds to be hashed before being use'

   176                         'd by the HMAC algorithm.',

   177                  hexdigests = {

   178                    hashlib.sha224: '3a854166ac5d9f023f54d517d0b39dbd'

   179                                    '946770db9c2b95c9f6f565d1',

   180                    hashlib.sha256: '9b09ffa71b942fcb27635fbcd5b0e944'

   181                                    'bfdc63644f0713938a7f51535c3a35e2',

   182                    hashlib.sha384: '6617178e941f020d351e2f254e8fd32c'

   183                                    '602420feb0b8fb9adccebb82461e99c5'

   184                                    'a678cc31e799176d3860e6110c46523e',

   185                    hashlib.sha512: 'e37b6a775dc87dbaa4dfa9f96e5e3ffd'

   186                                    'debd71f8867289865df5a32d20cdc944'

   187                                    'b6022cac3c4982b10d5eeb55c3e4de15'

   188                                    '134676fb6de0446065c97440fa8c6a58',

   189                  })

   190 

   191     def test_sha224_rfc4231(self):

   192         self._rfc4231_test_cases(hashlib.sha224)

   193 

   194     def test_sha256_rfc4231(self):

   195         self._rfc4231_test_cases(hashlib.sha256)

   196 

   197     def test_sha384_rfc4231(self):

   198         self._rfc4231_test_cases(hashlib.sha384)

   199 

   200     def test_sha512_rfc4231(self):

   201         self._rfc4231_test_cases(hashlib.sha512)

   202 

   203     def test_legacy_block_size_warnings(self):

   204         class MockCrazyHash(object):

   205             """Ain't no block_size attribute here."""

   206             def __init__(self, *args):

   207                 self._x = hashlib.sha1(*args)

   208                 self.digest_size = self._x.digest_size

   209             def update(self, v):

   210                 self._x.update(v)

   211             def digest(self):

   212                 return self._x.digest()

   213 

   214         with warnings.catch_warnings():

   215             warnings.simplefilter('error', RuntimeWarning)

   216             try:

   217                 hmac.HMAC('a', 'b', digestmod=MockCrazyHash)

   218             except RuntimeWarning:

   219                 pass

   220             else:

   221                 self.fail('Expected warning about missing block_size')

   222 

   223             MockCrazyHash.block_size = 1

   224             try:

   225                 hmac.HMAC('a', 'b', digestmod=MockCrazyHash)

   226             except RuntimeWarning:

   227                 pass

   228             else:

   229                 self.fail('Expected warning about small block_size')

   230 

   231 

   232 

   233 class ConstructorTestCase(unittest.TestCase):

   234 

   235     def test_normal(self):

   236         # Standard constructor call.

   237         failed = 0

   238         try:

   239             h = hmac.HMAC("key")

   240         except:

   241             self.fail("Standard constructor call raised exception.")

   242 

   243     def test_withtext(self):

   244         # Constructor call with text.

   245         try:

   246             h = hmac.HMAC("key", "hash this!")

   247         except:

   248             self.fail("Constructor call with text argument raised exception.")

   249 

   250     def test_withmodule(self):

   251         # Constructor call with text and digest module.

   252         try:

   253             h = hmac.HMAC("key", "", hashlib.sha1)

   254         except:

   255             self.fail("Constructor call with hashlib.sha1 raised exception.")

   256 

   257 class SanityTestCase(unittest.TestCase):

   258 

   259     def test_default_is_md5(self):

   260         # Testing if HMAC defaults to MD5 algorithm.

   261         # NOTE: this whitebox test depends on the hmac class internals

   262         h = hmac.HMAC("key")

   263         self.failUnless(h.digest_cons == hashlib.md5)

   264 

   265     def test_exercise_all_methods(self):

   266         # Exercising all methods once.

   267         # This must not raise any exceptions

   268         try:

   269             h = hmac.HMAC("my secret key")

   270             h.update("compute the hash of this text!")

   271             dig = h.digest()

   272             dig = h.hexdigest()

   273             h2 = h.copy()

   274         except:

   275             self.fail("Exception raised during normal usage of HMAC class.")

   276 

   277 class CopyTestCase(unittest.TestCase):

   278 

   279     def test_attributes(self):

   280         # Testing if attributes are of same type.

   281         h1 = hmac.HMAC("key")

   282         h2 = h1.copy()

   283         self.failUnless(h1.digest_cons == h2.digest_cons,

   284             "digest constructors don't match.")

   285         self.failUnless(type(h1.inner) == type(h2.inner),

   286             "Types of inner don't match.")

   287         self.failUnless(type(h1.outer) == type(h2.outer),

   288             "Types of outer don't match.")

   289 

   290     def test_realcopy(self):

   291         # Testing if the copy method created a real copy.

   292         h1 = hmac.HMAC("key")

   293         h2 = h1.copy()

   294         # Using id() in case somebody has overridden __cmp__.

   295         self.failUnless(id(h1) != id(h2), "No real copy of the HMAC instance.")

   296         self.failUnless(id(h1.inner) != id(h2.inner),

   297             "No real copy of the attribute 'inner'.")

   298         self.failUnless(id(h1.outer) != id(h2.outer),

   299             "No real copy of the attribute 'outer'.")

   300 

   301     def test_equality(self):

   302         # Testing if the copy has the same digests.

   303         h1 = hmac.HMAC("key")

   304         h1.update("some random text")

   305         h2 = h1.copy()

   306         self.failUnless(h1.digest() == h2.digest(),

   307             "Digest of copy doesn't match original digest.")

   308         self.failUnless(h1.hexdigest() == h2.hexdigest(),

   309             "Hexdigest of copy doesn't match original hexdigest.")

   310 

   311 def test_main():

   312     test_support.run_unittest(

   313         TestVectorsTestCase,

   314         ConstructorTestCase,

   315         SanityTestCase,

   316         CopyTestCase

   317     )

   318 

   319 if __name__ == "__main__":

   320     test_main()