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436 lines
17 KiB
Python
436 lines
17 KiB
Python
import hmac
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import hashlib
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import unittest
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import warnings
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from test import support
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class TestVectorsTestCase(unittest.TestCase):
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def test_md5_vectors(self):
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# Test the HMAC module against test vectors from the RFC.
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def md5test(key, data, digest):
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h = hmac.HMAC(key, data)
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self.assertEqual(h.hexdigest().upper(), digest.upper())
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md5test(b"\x0b" * 16,
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b"Hi There",
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"9294727A3638BB1C13F48EF8158BFC9D")
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md5test(b"Jefe",
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b"what do ya want for nothing?",
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"750c783e6ab0b503eaa86e310a5db738")
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md5test(b"\xaa" * 16,
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b"\xdd" * 50,
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"56be34521d144c88dbb8c733f0e8b3f6")
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md5test(bytes(range(1, 26)),
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b"\xcd" * 50,
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"697eaf0aca3a3aea3a75164746ffaa79")
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md5test(b"\x0C" * 16,
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b"Test With Truncation",
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"56461ef2342edc00f9bab995690efd4c")
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md5test(b"\xaa" * 80,
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b"Test Using Larger Than Block-Size Key - Hash Key First",
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"6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd")
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md5test(b"\xaa" * 80,
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(b"Test Using Larger Than Block-Size Key "
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b"and Larger Than One Block-Size Data"),
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"6f630fad67cda0ee1fb1f562db3aa53e")
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def test_sha_vectors(self):
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def shatest(key, data, digest):
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h = hmac.HMAC(key, data, digestmod=hashlib.sha1)
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self.assertEqual(h.hexdigest().upper(), digest.upper())
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shatest(b"\x0b" * 20,
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b"Hi There",
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"b617318655057264e28bc0b6fb378c8ef146be00")
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shatest(b"Jefe",
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b"what do ya want for nothing?",
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"effcdf6ae5eb2fa2d27416d5f184df9c259a7c79")
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shatest(b"\xAA" * 20,
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b"\xDD" * 50,
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"125d7342b9ac11cd91a39af48aa17b4f63f175d3")
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shatest(bytes(range(1, 26)),
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b"\xCD" * 50,
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"4c9007f4026250c6bc8414f9bf50c86c2d7235da")
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shatest(b"\x0C" * 20,
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b"Test With Truncation",
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"4c1a03424b55e07fe7f27be1d58bb9324a9a5a04")
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shatest(b"\xAA" * 80,
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b"Test Using Larger Than Block-Size Key - Hash Key First",
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"aa4ae5e15272d00e95705637ce8a3b55ed402112")
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shatest(b"\xAA" * 80,
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(b"Test Using Larger Than Block-Size Key "
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b"and Larger Than One Block-Size Data"),
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"e8e99d0f45237d786d6bbaa7965c7808bbff1a91")
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def _rfc4231_test_cases(self, hashfunc):
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def hmactest(key, data, hexdigests):
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h = hmac.HMAC(key, data, digestmod=hashfunc)
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self.assertEqual(h.hexdigest().lower(), hexdigests[hashfunc])
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# 4.2. Test Case 1
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hmactest(key = b'\x0b'*20,
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data = b'Hi There',
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hexdigests = {
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hashlib.sha224: '896fb1128abbdf196832107cd49df33f'
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'47b4b1169912ba4f53684b22',
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hashlib.sha256: 'b0344c61d8db38535ca8afceaf0bf12b'
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'881dc200c9833da726e9376c2e32cff7',
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hashlib.sha384: 'afd03944d84895626b0825f4ab46907f'
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'15f9dadbe4101ec682aa034c7cebc59c'
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'faea9ea9076ede7f4af152e8b2fa9cb6',
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hashlib.sha512: '87aa7cdea5ef619d4ff0b4241a1d6cb0'
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'2379f4e2ce4ec2787ad0b30545e17cde'
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'daa833b7d6b8a702038b274eaea3f4e4'
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'be9d914eeb61f1702e696c203a126854',
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})
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# 4.3. Test Case 2
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hmactest(key = b'Jefe',
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data = b'what do ya want for nothing?',
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hexdigests = {
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hashlib.sha224: 'a30e01098bc6dbbf45690f3a7e9e6d0f'
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'8bbea2a39e6148008fd05e44',
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hashlib.sha256: '5bdcc146bf60754e6a042426089575c7'
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'5a003f089d2739839dec58b964ec3843',
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hashlib.sha384: 'af45d2e376484031617f78d2b58a6b1b'
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'9c7ef464f5a01b47e42ec3736322445e'
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'8e2240ca5e69e2c78b3239ecfab21649',
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hashlib.sha512: '164b7a7bfcf819e2e395fbe73b56e0a3'
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'87bd64222e831fd610270cd7ea250554'
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'9758bf75c05a994a6d034f65f8f0e6fd'
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'caeab1a34d4a6b4b636e070a38bce737',
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})
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# 4.4. Test Case 3
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hmactest(key = b'\xaa'*20,
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data = b'\xdd'*50,
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hexdigests = {
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hashlib.sha224: '7fb3cb3588c6c1f6ffa9694d7d6ad264'
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'9365b0c1f65d69d1ec8333ea',
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hashlib.sha256: '773ea91e36800e46854db8ebd09181a7'
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'2959098b3ef8c122d9635514ced565fe',
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hashlib.sha384: '88062608d3e6ad8a0aa2ace014c8a86f'
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'0aa635d947ac9febe83ef4e55966144b'
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'2a5ab39dc13814b94e3ab6e101a34f27',
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hashlib.sha512: 'fa73b0089d56a284efb0f0756c890be9'
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'b1b5dbdd8ee81a3655f83e33b2279d39'
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'bf3e848279a722c806b485a47e67c807'
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'b946a337bee8942674278859e13292fb',
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})
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# 4.5. Test Case 4
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hmactest(key = bytes(x for x in range(0x01, 0x19+1)),
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data = b'\xcd'*50,
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hexdigests = {
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hashlib.sha224: '6c11506874013cac6a2abc1bb382627c'
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'ec6a90d86efc012de7afec5a',
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hashlib.sha256: '82558a389a443c0ea4cc819899f2083a'
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'85f0faa3e578f8077a2e3ff46729665b',
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hashlib.sha384: '3e8a69b7783c25851933ab6290af6ca7'
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'7a9981480850009cc5577c6e1f573b4e'
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'6801dd23c4a7d679ccf8a386c674cffb',
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hashlib.sha512: 'b0ba465637458c6990e5a8c5f61d4af7'
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'e576d97ff94b872de76f8050361ee3db'
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'a91ca5c11aa25eb4d679275cc5788063'
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'a5f19741120c4f2de2adebeb10a298dd',
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})
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# 4.7. Test Case 6
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hmactest(key = b'\xaa'*131,
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data = b'Test Using Larger Than Block-Siz'
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b'e Key - Hash Key First',
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hexdigests = {
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hashlib.sha224: '95e9a0db962095adaebe9b2d6f0dbce2'
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'd499f112f2d2b7273fa6870e',
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hashlib.sha256: '60e431591ee0b67f0d8a26aacbf5b77f'
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'8e0bc6213728c5140546040f0ee37f54',
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hashlib.sha384: '4ece084485813e9088d2c63a041bc5b4'
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'4f9ef1012a2b588f3cd11f05033ac4c6'
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'0c2ef6ab4030fe8296248df163f44952',
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hashlib.sha512: '80b24263c7c1a3ebb71493c1dd7be8b4'
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'9b46d1f41b4aeec1121b013783f8f352'
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'6b56d037e05f2598bd0fd2215d6a1e52'
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'95e64f73f63f0aec8b915a985d786598',
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})
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# 4.8. Test Case 7
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hmactest(key = b'\xaa'*131,
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data = b'This is a test using a larger th'
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b'an block-size key and a larger t'
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b'han block-size data. The key nee'
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b'ds to be hashed before being use'
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b'd by the HMAC algorithm.',
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hexdigests = {
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hashlib.sha224: '3a854166ac5d9f023f54d517d0b39dbd'
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'946770db9c2b95c9f6f565d1',
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hashlib.sha256: '9b09ffa71b942fcb27635fbcd5b0e944'
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'bfdc63644f0713938a7f51535c3a35e2',
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hashlib.sha384: '6617178e941f020d351e2f254e8fd32c'
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'602420feb0b8fb9adccebb82461e99c5'
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'a678cc31e799176d3860e6110c46523e',
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hashlib.sha512: 'e37b6a775dc87dbaa4dfa9f96e5e3ffd'
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'debd71f8867289865df5a32d20cdc944'
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'b6022cac3c4982b10d5eeb55c3e4de15'
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'134676fb6de0446065c97440fa8c6a58',
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})
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def test_sha224_rfc4231(self):
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self._rfc4231_test_cases(hashlib.sha224)
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def test_sha256_rfc4231(self):
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self._rfc4231_test_cases(hashlib.sha256)
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def test_sha384_rfc4231(self):
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self._rfc4231_test_cases(hashlib.sha384)
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def test_sha512_rfc4231(self):
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self._rfc4231_test_cases(hashlib.sha512)
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def test_legacy_block_size_warnings(self):
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class MockCrazyHash(object):
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"""Ain't no block_size attribute here."""
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def __init__(self, *args):
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self._x = hashlib.sha1(*args)
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self.digest_size = self._x.digest_size
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def update(self, v):
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self._x.update(v)
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def digest(self):
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return self._x.digest()
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with warnings.catch_warnings():
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warnings.simplefilter('error', RuntimeWarning)
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with self.assertRaises(RuntimeWarning):
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hmac.HMAC(b'a', b'b', digestmod=MockCrazyHash)
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self.fail('Expected warning about missing block_size')
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MockCrazyHash.block_size = 1
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with self.assertRaises(RuntimeWarning):
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hmac.HMAC(b'a', b'b', digestmod=MockCrazyHash)
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self.fail('Expected warning about small block_size')
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class ConstructorTestCase(unittest.TestCase):
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def test_normal(self):
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# Standard constructor call.
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failed = 0
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try:
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h = hmac.HMAC(b"key")
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except:
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self.fail("Standard constructor call raised exception.")
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def test_with_str_key(self):
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# Pass a key of type str, which is an error, because it expects a key
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# of type bytes
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with self.assertRaises(TypeError):
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h = hmac.HMAC("key")
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def test_dot_new_with_str_key(self):
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# Pass a key of type str, which is an error, because it expects a key
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# of type bytes
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with self.assertRaises(TypeError):
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h = hmac.new("key")
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def test_withtext(self):
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# Constructor call with text.
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try:
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h = hmac.HMAC(b"key", b"hash this!")
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except:
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self.fail("Constructor call with text argument raised exception.")
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def test_withmodule(self):
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# Constructor call with text and digest module.
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try:
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h = hmac.HMAC(b"key", b"", hashlib.sha1)
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except:
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self.fail("Constructor call with hashlib.sha1 raised exception.")
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class SanityTestCase(unittest.TestCase):
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def test_default_is_md5(self):
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# Testing if HMAC defaults to MD5 algorithm.
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# NOTE: this whitebox test depends on the hmac class internals
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h = hmac.HMAC(b"key")
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self.assertEqual(h.digest_cons, hashlib.md5)
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def test_exercise_all_methods(self):
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# Exercising all methods once.
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# This must not raise any exceptions
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try:
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h = hmac.HMAC(b"my secret key")
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h.update(b"compute the hash of this text!")
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dig = h.digest()
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dig = h.hexdigest()
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h2 = h.copy()
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except:
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self.fail("Exception raised during normal usage of HMAC class.")
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class CopyTestCase(unittest.TestCase):
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def test_attributes(self):
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# Testing if attributes are of same type.
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h1 = hmac.HMAC(b"key")
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h2 = h1.copy()
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self.assertTrue(h1.digest_cons == h2.digest_cons,
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"digest constructors don't match.")
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self.assertEqual(type(h1.inner), type(h2.inner),
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"Types of inner don't match.")
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self.assertEqual(type(h1.outer), type(h2.outer),
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"Types of outer don't match.")
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def test_realcopy(self):
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# Testing if the copy method created a real copy.
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h1 = hmac.HMAC(b"key")
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h2 = h1.copy()
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# Using id() in case somebody has overridden __eq__/__ne__.
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self.assertTrue(id(h1) != id(h2), "No real copy of the HMAC instance.")
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self.assertTrue(id(h1.inner) != id(h2.inner),
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"No real copy of the attribute 'inner'.")
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self.assertTrue(id(h1.outer) != id(h2.outer),
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"No real copy of the attribute 'outer'.")
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def test_equality(self):
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# Testing if the copy has the same digests.
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h1 = hmac.HMAC(b"key")
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h1.update(b"some random text")
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h2 = h1.copy()
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self.assertEqual(h1.digest(), h2.digest(),
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"Digest of copy doesn't match original digest.")
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self.assertEqual(h1.hexdigest(), h2.hexdigest(),
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"Hexdigest of copy doesn't match original hexdigest.")
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class CompareDigestTestCase(unittest.TestCase):
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def test_compare_digest(self):
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# Testing input type exception handling
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a, b = 100, 200
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = 100, b"foobar"
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = b"foobar", 200
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = "foobar", b"foobar"
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = b"foobar", "foobar"
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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# Testing bytes of different lengths
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a, b = b"foobar", b"foo"
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self.assertFalse(hmac.compare_digest(a, b))
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a, b = b"\xde\xad\xbe\xef", b"\xde\xad"
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self.assertFalse(hmac.compare_digest(a, b))
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# Testing bytes of same lengths, different values
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a, b = b"foobar", b"foobaz"
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self.assertFalse(hmac.compare_digest(a, b))
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a, b = b"\xde\xad\xbe\xef", b"\xab\xad\x1d\xea"
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self.assertFalse(hmac.compare_digest(a, b))
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# Testing bytes of same lengths, same values
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a, b = b"foobar", b"foobar"
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self.assertTrue(hmac.compare_digest(a, b))
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a, b = b"\xde\xad\xbe\xef", b"\xde\xad\xbe\xef"
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self.assertTrue(hmac.compare_digest(a, b))
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# Testing bytearrays of same lengths, same values
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a, b = bytearray(b"foobar"), bytearray(b"foobar")
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self.assertTrue(hmac.compare_digest(a, b))
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# Testing bytearrays of diffeent lengths
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a, b = bytearray(b"foobar"), bytearray(b"foo")
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self.assertFalse(hmac.compare_digest(a, b))
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# Testing bytearrays of same lengths, different values
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a, b = bytearray(b"foobar"), bytearray(b"foobaz")
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self.assertFalse(hmac.compare_digest(a, b))
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# Testing byte and bytearray of same lengths, same values
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a, b = bytearray(b"foobar"), b"foobar"
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self.assertTrue(hmac.compare_digest(a, b))
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self.assertTrue(hmac.compare_digest(b, a))
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# Testing byte bytearray of diffeent lengths
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a, b = bytearray(b"foobar"), b"foo"
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self.assertFalse(hmac.compare_digest(a, b))
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self.assertFalse(hmac.compare_digest(b, a))
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# Testing byte and bytearray of same lengths, different values
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a, b = bytearray(b"foobar"), b"foobaz"
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self.assertFalse(hmac.compare_digest(a, b))
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self.assertFalse(hmac.compare_digest(b, a))
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# Testing str of same lengths
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a, b = "foobar", "foobar"
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self.assertTrue(hmac.compare_digest(a, b))
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# Testing str of diffeent lengths
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a, b = "foo", "foobar"
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self.assertFalse(hmac.compare_digest(a, b))
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# Testing bytes of same lengths, different values
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a, b = "foobar", "foobaz"
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self.assertFalse(hmac.compare_digest(a, b))
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# Testing error cases
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a, b = "foobar", b"foobar"
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = b"foobar", "foobar"
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = b"foobar", 1
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = 100, 200
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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a, b = "fooä", "fooä"
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self.assertRaises(TypeError, hmac.compare_digest, a, b)
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# subclasses are supported by ignore __eq__
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class mystr(str):
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def __eq__(self, other):
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return False
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a, b = mystr("foobar"), mystr("foobar")
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self.assertTrue(hmac.compare_digest(a, b))
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a, b = mystr("foobar"), "foobar"
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self.assertTrue(hmac.compare_digest(a, b))
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a, b = mystr("foobar"), mystr("foobaz")
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self.assertFalse(hmac.compare_digest(a, b))
|
|
|
|
class mybytes(bytes):
|
|
def __eq__(self, other):
|
|
return False
|
|
|
|
a, b = mybytes(b"foobar"), mybytes(b"foobar")
|
|
self.assertTrue(hmac.compare_digest(a, b))
|
|
a, b = mybytes(b"foobar"), b"foobar"
|
|
self.assertTrue(hmac.compare_digest(a, b))
|
|
a, b = mybytes(b"foobar"), mybytes(b"foobaz")
|
|
self.assertFalse(hmac.compare_digest(a, b))
|
|
|
|
|
|
def test_main():
|
|
support.run_unittest(
|
|
TestVectorsTestCase,
|
|
ConstructorTestCase,
|
|
SanityTestCase,
|
|
CopyTestCase,
|
|
CompareDigestTestCase
|
|
)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|