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/Lib/test/test_hmac.py

http://unladen-swallow.googlecode.com/
Python | 320 lines | 312 code | 7 blank | 1 comment | 1 complexity | ad0e0f596a9252539585a81a6800fa04 MD5 | raw file
  1import hmac
  2import hashlib
  3import unittest
  4import warnings
  5from test import test_support
  6
  7class 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
233class 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
257class 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
277class 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
311def test_main():
312    test_support.run_unittest(
313        TestVectorsTestCase,
314        ConstructorTestCase,
315        SanityTestCase,
316        CopyTestCase
317    )
318
319if __name__ == "__main__":
320    test_main()