text: import binascii
  import functools
  import hmac
  import hashlib
  import unittest
  import unittest.mock
  import warnings
  
  from test.support import requires_hashdigest
  
  
  def ignore_warning(func):
      @functools.wraps(func)
      def wrapper(*args, **kwargs):
          with warnings.catch_warnings():
              warnings.filterwarnings("ignore",
                                      category=DeprecationWarning)
              return func(*args, **kwargs)
      return wrapper
  
  
  class TestVectorsTestCase(unittest.TestCase):
  
      @requires_hashdigest('md5')
      def test_md5_vectors(self):
          # Test the HMAC module against test vectors from the RFC.
  
          def md5test(key, data, digest):
              h = hmac.HMAC(key, data, digestmod=hashlib.md5)
              self.assertEqual(h.hexdigest().upper(), digest.upper())
              self.assertEqual(h.digest(), binascii.unhexlify(digest))
              self.assertEqual(h.name, "hmac-md5")
              self.assertEqual(h.digest_size, 16)
              self.assertEqual(h.block_size, 64)
  
              h = hmac.HMAC(key, data, digestmod='md5')
              self.assertEqual(h.hexdigest().upper(), digest.upper())
              self.assertEqual(h.digest(), binascii.unhexlify(digest))
              self.assertEqual(h.name, "hmac-md5")
              self.assertEqual(h.digest_size, 16)
              self.assertEqual(h.block_size, 64)
  
              self.assertEqual(
                  hmac.digest(key, data, digest='md5'),
                  binascii.unhexlify(digest)
              )
              with unittest.mock.patch('hmac._openssl_md_meths', {}):
                  self.assertEqual(
                      hmac.digest(key, data, digest='md5'),
                      binascii.unhexlify(digest)
                  )
  
          md5test(b"\x0b" * 16,
                  b"Hi There",
                  "9294727A3638BB1C13F48EF8158BFC9D")
  
          md5test(b"Jefe",
                  b"what do ya want for nothing?",
                  "750c783e6ab0b503eaa86e310a5db738")
  
          md5test(b"\xaa" * 16,
                  b"\xdd" * 50,
                  "56be34521d144c88dbb8c733f0e8b3f6")
  
          md5test(bytes(range(1, 26)),
                  b"\xcd" * 50,
                  "697eaf0aca3a3aea3a75164746ffaa79")
  
          md5test(b"\x0C" * 16,
                  b"Test With Truncation",
                  "56461ef2342edc00f9bab995690efd4c")
  
          md5test(b"\xaa" * 80,
                  b"Test Using Larger Than Block-Size Key - Hash Key First",
                  "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd")
  
          md5test(b"\xaa" * 80,
                  (b"Test Using Larger Than Block-Size Key "
                   b"and Larger Than One Block-Size Data"),
                  "6f630fad67cda0ee1fb1f562db3aa53e")
  
      @requires_hashdigest('sha1')
      def test_sha_vectors(self):
          def shatest(key, data, digest):
              h = hmac.HMAC(key, data, digestmod=hashlib.sha1)
              self.assertEqual(h.hexdigest().upper(), digest.upper())
              self.assertEqual(h.digest(), binascii.unhexlify(digest))
              self.assertEqual(h.name, "hmac-sha1")
              self.assertEqual(h.digest_size, 20)
              self.assertEqual(h.block_size, 64)
  
              h = hmac.HMAC(key, data, digestmod='sha1')
              self.assertEqual(h.hexdigest().upper(), digest.upper())
              self.assertEqual(h.digest(), binascii.unhexlify(digest))
              self.assertEqual(h.name, "hmac-sha1")
              self.assertEqual(h.digest_size, 20)
              self.assertEqual(h.block_size, 64)
  
              self.assertEqual(
                  hmac.digest(key, data, digest='sha1'),
                  binascii.unhexlify(digest)
              )
  
  
          shatest(b"\x0b" * 20,
                  b"Hi There",
                  "b617318655057264e28bc0b6fb378c8ef146be00")
  
          shatest(b"Jefe",
                  b"what do ya want for nothing?",
                  "effcdf6ae5eb2fa2d27416d5f184df9c259a7c79")
  
          shatest(b"\xAA" * 20,
                  b"\xDD" * 50,
                  "125d7342b9ac11cd91a39af48aa17b4f63f175d3")
  
          shatest(bytes(range(1, 26)),
                  b"\xCD" * 50,
                  "4c9007f4026250c6bc8414f9bf50c86c2d7235da")
  
          shatest(b"\x0C" * 20,
                  b"Test With Truncation",
                  "4c1a03424b55e07fe7f27be1d58bb9324a9a5a04")
  
          shatest(b"\xAA" * 80,
                  b"Test Using Larger Than Block-Size Key - Hash Key First",
                  "aa4ae5e15272d00e95705637ce8a3b55ed402112")
  
          shatest(b"\xAA" * 80,
                  (b"Test Using Larger Than Block-Size Key "
                   b"and Larger Than One Block-Size Data"),
                  "e8e99d0f45237d786d6bbaa7965c7808bbff1a91")
  
      def _rfc4231_test_cases(self, hashfunc, hash_name, digest_size, block_size):
          def hmactest(key, data, hexdigests):
              hmac_name = "hmac-" + hash_name
              h = hmac.HMAC(key, data, digestmod=hashfunc)
              self.assertEqual(h.hexdigest().lower(), hexdigests[hashfunc])
              self.assertEqual(h.name, hmac_name)
              self.assertEqual(h.digest_size, digest_size)
              self.assertEqual(h.block_size, block_size)
  
              h = hmac.HMAC(key, data, digestmod=hash_name)
              self.assertEqual(h.hexdigest().lower(), hexdigests[hashfunc])
              self.assertEqual(h.name, hmac_name)
              self.assertEqual(h.digest_size, digest_size)
              self.assertEqual(h.block_size, block_size)
  
              self.assertEqual(
                  hmac.digest(key, data, digest=hashfunc),
                  binascii.unhexlify(hexdigests[hashfunc])
              )
              self.assertEqual(
                  hmac.digest(key, data, digest=hash_name),
                  binascii.unhexlify(hexdigests[hashfunc])
              )
  
              with unittest.mock.patch('hmac._openssl_md_meths', {}):
                  self.assertEqual(
                      hmac.digest(key, data, digest=hashfunc),
                      binascii.unhexlify(hexdigests[hashfunc])
                  )
                  self.assertEqual(
                      hmac.digest(key, data, digest=hash_name),
                      binascii.unhexlify(hexdigests[hashfunc])
                  )
  
          # 4.2.  Test Case 1
          hmactest(key = b'\x0b'*20,
                   data = b'Hi There',
                   hexdigests = {
                     hashlib.sha224: '896fb1128abbdf196832107cd49df33f'
                                     '47b4b1169912ba4f53684b22',
                     hashlib.sha256: 'b0344c61d8db38535ca8afceaf0bf12b'
                                     '881dc200c9833da726e9376c2e32cff7',
                     hashlib.sha384: 'afd03944d84895626b0825f4ab46907f'
                                     '15f9dadbe4101ec682aa034c7cebc59c'
                                     'faea9ea9076ede7f4af152e8b2fa9cb6',
                     hashlib.sha512: '87aa7cdea5ef619d4ff0b4241a1d6cb0'
                                     '2379f4e2ce4ec2787ad0b30545e17cde'
                                     'daa833b7d6b8a702038b274eaea3f4e4'
                                     'be9d914eeb61f1702e696c203a126854',
                   })
  
          # 4.3.  Test Case 2
          hmactest(key = b'Jefe',
                   data = b'what do ya want for nothing?',
                   hexdigests = {
                     hashlib.sha224: 'a30e01098bc6dbbf45690f3a7e9e6d0f'
                                     '8bbea2a39e6148008fd05e44',
                     hashlib.sha256: '5bdcc146bf60754e6a042426089575c7'
                                     '5a003f089d2739839dec58b964ec3843',
                     hashlib.sha384: 'af45d2e376484031617f78d2b58a6b1b'
                                     '9c7ef464f5a01b47e42ec3736322445e'
                                     '8e2240ca5e69e2c78b3239ecfab21649',
                     hashlib.sha512: '164b7a7bfcf819e2e395fbe73b56e0a3'
                                     '87bd64222e831fd610270cd7ea250554'
                                     '9758bf75c05a994a6d034f65f8f0e6fd'
                                     'caeab1a34d4a6b4b636e070a38bce737',
                   })
  
          # 4.4.  Test Case 3
          hmactest(key = b'\xaa'*20,
                   data = b'\xdd'*50,
                   hexdigests = {
                     hashlib.sha224: '7fb3cb3588c6c1f6ffa9694d7d6ad264'
                                     '9365b0c1f65d69d1ec8333ea',
                     hashlib.sha256: '773ea91e36800e46854db8ebd09181a7'
                                     '2959098b3ef8c122d9635514ced565fe',
                     hashlib.sha384: '88062608d3e6ad8a0aa2ace014c8a86f'
                                     '0aa635d947ac9febe83ef4e55966144b'
                                     '2a5ab39dc13814b94e3ab6e101a34f27',
                     hashlib.sha512: 'fa73b0089d56a284efb0f0756c890be9'
                                     'b1b5dbdd8ee81a3655f83e33b2279d39'
                                     'bf3e848279a722c806b485a47e67c807'
                                     'b946a337bee8942674278859e13292fb',
                   })
  
          # 4.5.  Test Case 4
          hmactest(key = bytes(x for x in range(0x01, 0x19+1)),
                   data = b'\xcd'*50,
                   hexdigests = {
                     hashlib.sha224: '6c11506874013cac6a2abc1bb382627c'
                                     'ec6a90d86efc012de7afec5a',
                     hashlib.sha256: '82558a389a443c0ea4cc819899f2083a'
                                     '85f0faa3e578f8077a2e3ff46729665b',
                     hashlib.sha384: '3e8a69b7783c25851933ab6290af6ca7'
                                     '7a9981480850009cc5577c6e1f573b4e'
                                     '6801dd23c4a7d679ccf8a386c674cffb',
                     hashlib.sha512: 'b0ba465637458c6990e5a8c5f61d4af7'
                                     'e576d97ff94b872de76f8050361ee3db'
                                     'a91ca5c11aa25eb4d679275cc5788063'
                                     'a5f19741120c4f2de2adebeb10a298dd',
                   })
  
          # 4.7.  Test Case 6
          hmactest(key = b'\xaa'*131,
                   data = b'Test Using Larger Than Block-Siz'
                          b'e Key - Hash Key First',
                   hexdigests = {
                     hashlib.sha224: '95e9a0db962095adaebe9b2d6f0dbce2'
                                     'd499f112f2d2b7273fa6870e',
                     hashlib.sha256: '60e431591ee0b67f0d8a26aacbf5b77f'
                                     '8e0bc6213728c5140546040f0ee37f54',
                     hashlib.sha384: '4ece084485813e9088d2c63a041bc5b4'
                                     '4f9ef1012a2b588f3cd11f05033ac4c6'
                                     '0c2ef6ab4030fe8296248df163f44952',
                     hashlib.sha512: '80b24263c7c1a3ebb71493c1dd7be8b4'
                                     '9b46d1f41b4aeec1121b013783f8f352'
                                     '6b56d037e05f2598bd0fd2215d6a1e52'
                                     '95e64f73f63f0aec8b915a985d786598',
                   })
  
          # 4.8.  Test Case 7
          hmactest(key = b'\xaa'*131,
                   data = b'This is a test using a larger th'
                          b'an block-size key and a larger t'
                          b'han block-size data. The key nee'
                          b'ds to be hashed before being use'
                          b'd by the HMAC algorithm.',
                   hexdigests = {
                     hashlib.sha224: '3a854166ac5d9f023f54d517d0b39dbd'
                                     '946770db9c2b95c9f6f565d1',
                     hashlib.sha256: '9b09ffa71b942fcb27635fbcd5b0e944'
                                     'bfdc63644f0713938a7f51535c3a35e2',
                     hashlib.sha384: '6617178e941f020d351e2f254e8fd32c'
                                     '602420feb0b8fb9adccebb82461e99c5'
                                     'a678cc31e799176d3860e6110c46523e',
                     hashlib.sha512: 'e37b6a775dc87dbaa4dfa9f96e5e3ffd'
                                     'debd71f8867289865df5a32d20cdc944'
                                     'b6022cac3c4982b10d5eeb55c3e4de15'
                                     '134676fb6de0446065c97440fa8c6a58',
                   })
  
      @requires_hashdigest('sha224')
      def test_sha224_rfc4231(self):
          self._rfc4231_test_cases(hashlib.sha224, 'sha224', 28, 64)
  
      @requires_hashdigest('sha256')
      def test_sha256_rfc4231(self):
          self._rfc4231_test_cases(hashlib.sha256, 'sha256', 32, 64)
  
      @requires_hashdigest('sha384')
      def test_sha384_rfc4231(self):
          self._rfc4231_test_cases(hashlib.sha384, 'sha384', 48, 128)
  
      @requires_hashdigest('sha512')
      def test_sha512_rfc4231(self):
          self._rfc4231_test_cases(hashlib.sha512, 'sha512', 64, 128)
  
      @requires_hashdigest('sha256')
      def test_legacy_block_size_warnings(self):
          class MockCrazyHash(object):
              """Ain't no block_size attribute here."""
              def __init__(self, *args):
                  self._x = hashlib.sha256(*args)
                  self.digest_size = self._x.digest_size
              def update(self, v):
                  self._x.update(v)
              def digest(self):
                  return self._x.digest()
  
          with warnings.catch_warnings():
              warnings.simplefilter('error', RuntimeWarning)
              with self.assertRaises(RuntimeWarning):
                  hmac.HMAC(b'a', b'b', digestmod=MockCrazyHash)
                  self.fail('Expected warning about missing block_size')
  
              MockCrazyHash.block_size = 1
              with self.assertRaises(RuntimeWarning):
                  hmac.HMAC(b'a', b'b', digestmod=MockCrazyHash)
                  self.fail('Expected warning about small block_size')
  
      def test_with_digestmod_no_default(self):
          with self.assertRaises(ValueError):
              key = b"\x0b" * 16
              data = b"Hi There"
              hmac.HMAC(key, data, digestmod=None)
  
  
  class ConstructorTestCase(unittest.TestCase):
  
      expected = (
          "6c845b47f52b3b47f6590c502db7825aad757bf4fadc8fa972f7cd2e76a5bdeb"
      )
  
      @requires_hashdigest('sha256')
      def test_normal(self):
          # Standard constructor call.
          try:
              hmac.HMAC(b"key", digestmod='sha256')
          except Exception:
              self.fail("Standard constructor call raised exception.")
  
      @requires_hashdigest('sha256')
      def test_with_str_key(self):
          # Pass a key of type str, which is an error, because it expects a key
          # of type bytes
          with self.assertRaises(TypeError):
              h = hmac.HMAC("key", digestmod='sha256')
  
      @requires_hashdigest('sha256')
      def test_dot_new_with_str_key(self):
          # Pass a key of type str, which is an error, because it expects a key
          # of type bytes
          with self.assertRaises(TypeError):
              h = hmac.new("key", digestmod='sha256')
  
      @requires_hashdigest('sha256')
      def test_withtext(self):
          # Constructor call with text.
          try:
              h = hmac.HMAC(b"key", b"hash this!", digestmod='sha256')
          except Exception:
              self.fail("Constructor call with text argument raised exception.")
          self.assertEqual(h.hexdigest(), self.expected)
  
      @requires_hashdigest('sha256')
      def test_with_bytearray(self):
          try:
              h = hmac.HMAC(bytearray(b"key"), bytearray(b"hash this!"),
                            digestmod="sha256")
          except Exception:
              self.fail("Constructor call with bytearray arguments raised exception.")
              self.assertEqual(h.hexdigest(), self.expected)
  
      @requires_hashdigest('sha256')
      def test_with_memoryview_msg(self):
          try:
              h = hmac.HMAC(b"key", memoryview(b"hash this!"), digestmod="sha256")
          except Exception:
              self.fail("Constructor call with memoryview msg raised exception.")
              self.assertEqual(h.hexdigest(), self.expected)
  
      @requires_hashdigest('sha256')
      def test_withmodule(self):
          # Constructor call with text and digest module.
          try:
              h = hmac.HMAC(b"key", b"", hashlib.sha256)
          except Exception:
              self.fail("Constructor call with hashlib.sha256 raised exception.")
  
  
  class SanityTestCase(unittest.TestCase):
  
      @requires_hashdigest('sha256')
      def test_exercise_all_methods(self):
          # Exercising all methods once.
          # This must not raise any exceptions
          try:
              h = hmac.HMAC(b"my secret key", digestmod="sha256")
              h.update(b"compute the hash of this text!")
              dig = h.digest()
              dig = h.hexdigest()
              h2 = h.copy()
          except Exception:
              self.fail("Exception raised during normal usage of HMAC class.")
  
  
  class CopyTestCase(unittest.TestCase):
  
      @requires_hashdigest('sha256')
      def test_attributes(self):
          # Testing if attributes are of same type.
          h1 = hmac.HMAC(b"key", digestmod="sha256")
          h2 = h1.copy()
          self.assertTrue(h1.digest_cons == h2.digest_cons,
              "digest constructors don't match.")
          self.assertEqual(type(h1.inner), type(h2.inner),
              "Types of inner don't match.")
          self.assertEqual(type(h1.outer), type(h2.outer),
              "Types of outer don't match.")
  
      @requires_hashdigest('sha256')
      def test_realcopy(self):
          # Testing if the copy method created a real copy.
          h1 = hmac.HMAC(b"key", digestmod="sha256")
          h2 = h1.copy()
          # Using id() in case somebody has overridden __eq__/__ne__.
          self.assertTrue(id(h1) != id(h2), "No real copy of the HMAC instance.")
          self.assertTrue(id(h1.inner) != id(h2.inner),
              "No real copy of the attribute 'inner'.")
          self.assertTrue(id(h1.outer) != id(h2.outer),
              "No real copy of the attribute 'outer'.")
  
      @requires_hashdigest('sha256')
      def test_equality(self):
          # Testing if the copy has the same digests.
          h1 = hmac.HMAC(b"key", digestmod="sha256")
          h1.update(b"some random text")
          h2 = h1.copy()
          self.assertEqual(h1.digest(), h2.digest(),
              "Digest of copy doesn't match original digest.")
          self.assertEqual(h1.hexdigest(), h2.hexdigest(),
              "Hexdigest of copy doesn't match original hexdigest.")
  
  class CompareDigestTestCase(unittest.TestCase):
  
      def test_compare_digest(self):
          # Testing input type exception handling
          a, b = 100, 200
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = 100, b"foobar"
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = b"foobar", 200
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = "foobar", b"foobar"
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = b"foobar", "foobar"
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
  
          # Testing bytes of different lengths
          a, b = b"foobar", b"foo"
          self.assertFalse(hmac.compare_digest(a, b))
          a, b = b"\xde\xad\xbe\xef", b"\xde\xad"
          self.assertFalse(hmac.compare_digest(a, b))
  
          # Testing bytes of same lengths, different values
          a, b = b"foobar", b"foobaz"
          self.assertFalse(hmac.compare_digest(a, b))
          a, b = b"\xde\xad\xbe\xef", b"\xab\xad\x1d\xea"
          self.assertFalse(hmac.compare_digest(a, b))
  
          # Testing bytes of same lengths, same values
          a, b = b"foobar", b"foobar"
          self.assertTrue(hmac.compare_digest(a, b))
          a, b = b"\xde\xad\xbe\xef", b"\xde\xad\xbe\xef"
          self.assertTrue(hmac.compare_digest(a, b))
  
          # Testing bytearrays of same lengths, same values
          a, b = bytearray(b"foobar"), bytearray(b"foobar")
          self.assertTrue(hmac.compare_digest(a, b))
  
          # Testing bytearrays of different lengths
          a, b = bytearray(b"foobar"), bytearray(b"foo")
          self.assertFalse(hmac.compare_digest(a, b))
  
          # Testing bytearrays of same lengths, different values
          a, b = bytearray(b"foobar"), bytearray(b"foobaz")
          self.assertFalse(hmac.compare_digest(a, b))
  
          # Testing byte and bytearray of same lengths, same values
          a, b = bytearray(b"foobar"), b"foobar"
          self.assertTrue(hmac.compare_digest(a, b))
          self.assertTrue(hmac.compare_digest(b, a))
  
          # Testing byte bytearray of different lengths
          a, b = bytearray(b"foobar"), b"foo"
          self.assertFalse(hmac.compare_digest(a, b))
          self.assertFalse(hmac.compare_digest(b, a))
  
          # Testing byte and bytearray of same lengths, different values
          a, b = bytearray(b"foobar"), b"foobaz"
          self.assertFalse(hmac.compare_digest(a, b))
          self.assertFalse(hmac.compare_digest(b, a))
  
          # Testing str of same lengths
          a, b = "foobar", "foobar"
          self.assertTrue(hmac.compare_digest(a, b))
  
          # Testing str of different lengths
          a, b = "foo", "foobar"
          self.assertFalse(hmac.compare_digest(a, b))
  
          # Testing bytes of same lengths, different values
          a, b = "foobar", "foobaz"
          self.assertFalse(hmac.compare_digest(a, b))
  
          # Testing error cases
          a, b = "foobar", b"foobar"
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = b"foobar", "foobar"
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = b"foobar", 1
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = 100, 200
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
          a, b = "fooä", "fooä"
          self.assertRaises(TypeError, hmac.compare_digest, a, b)
  
          # subclasses are supported by ignore __eq__
          class mystr(str):
              def __eq__(self, other):
                  return False
  
          a, b = mystr("foobar"), mystr("foobar")
          self.assertTrue(hmac.compare_digest(a, b))
          a, b = mystr("foobar"), "foobar"
          self.assertTrue(hmac.compare_digest(a, b))
          a, b = mystr("foobar"), mystr("foobaz")
          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))
  
  
  if __name__ == "__main__":
      unittest.main()
  