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      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             with self.assertRaises(RuntimeWarning):
    217                 hmac.HMAC('a', 'b', digestmod=MockCrazyHash)
    218                 self.fail('Expected warning about missing block_size')
    219 
    220             MockCrazyHash.block_size = 1
    221             with self.assertRaises(RuntimeWarning):
    222                 hmac.HMAC('a', 'b', digestmod=MockCrazyHash)
    223                 self.fail('Expected warning about small block_size')
    224 
    225 
    226 
    227 class ConstructorTestCase(unittest.TestCase):
    228 
    229     def test_normal(self):
    230         # Standard constructor call.
    231         failed = 0
    232         try:
    233             h = hmac.HMAC("key")
    234         except:
    235             self.fail("Standard constructor call raised exception.")
    236 
    237     def test_withtext(self):
    238         # Constructor call with text.
    239         try:
    240             h = hmac.HMAC("key", "hash this!")
    241         except:
    242             self.fail("Constructor call with text argument raised exception.")
    243 
    244     def test_withmodule(self):
    245         # Constructor call with text and digest module.
    246         try:
    247             h = hmac.HMAC("key", "", hashlib.sha1)
    248         except:
    249             self.fail("Constructor call with hashlib.sha1 raised exception.")
    250 
    251 class SanityTestCase(unittest.TestCase):
    252 
    253     def test_default_is_md5(self):
    254         # Testing if HMAC defaults to MD5 algorithm.
    255         # NOTE: this whitebox test depends on the hmac class internals
    256         h = hmac.HMAC("key")
    257         self.assertTrue(h.digest_cons == hashlib.md5)
    258 
    259     def test_exercise_all_methods(self):
    260         # Exercising all methods once.
    261         # This must not raise any exceptions
    262         try:
    263             h = hmac.HMAC("my secret key")
    264             h.update("compute the hash of this text!")
    265             dig = h.digest()
    266             dig = h.hexdigest()
    267             h2 = h.copy()
    268         except:
    269             self.fail("Exception raised during normal usage of HMAC class.")
    270 
    271 class CopyTestCase(unittest.TestCase):
    272 
    273     def test_attributes(self):
    274         # Testing if attributes are of same type.
    275         h1 = hmac.HMAC("key")
    276         h2 = h1.copy()
    277         self.assertTrue(h1.digest_cons == h2.digest_cons,
    278             "digest constructors don't match.")
    279         self.assertTrue(type(h1.inner) == type(h2.inner),
    280             "Types of inner don't match.")
    281         self.assertTrue(type(h1.outer) == type(h2.outer),
    282             "Types of outer don't match.")
    283 
    284     def test_realcopy(self):
    285         # Testing if the copy method created a real copy.
    286         h1 = hmac.HMAC("key")
    287         h2 = h1.copy()
    288         # Using id() in case somebody has overridden __cmp__.
    289         self.assertTrue(id(h1) != id(h2), "No real copy of the HMAC instance.")
    290         self.assertTrue(id(h1.inner) != id(h2.inner),
    291             "No real copy of the attribute 'inner'.")
    292         self.assertTrue(id(h1.outer) != id(h2.outer),
    293             "No real copy of the attribute 'outer'.")
    294 
    295     def test_equality(self):
    296         # Testing if the copy has the same digests.
    297         h1 = hmac.HMAC("key")
    298         h1.update("some random text")
    299         h2 = h1.copy()
    300         self.assertTrue(h1.digest() == h2.digest(),
    301             "Digest of copy doesn't match original digest.")
    302         self.assertTrue(h1.hexdigest() == h2.hexdigest(),
    303             "Hexdigest of copy doesn't match original hexdigest.")
    304 
    305 def test_main():
    306     test_support.run_unittest(
    307         TestVectorsTestCase,
    308         ConstructorTestCase,
    309         SanityTestCase,
    310         CopyTestCase
    311     )
    312 
    313 if __name__ == "__main__":
    314     test_main()
    315