Lib/test/test_hmac.py

   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()