Merge pull request #255 from alex/remove-backends

Remove the hash and hmac specific classes, now that the logic is the Con...

14 files changed, 115 insertions, 137 deletions

diff --git a/cryptography/hazmat/bindings/openssl/backend.py b/cryptography/hazmat/bindings/openssl/backend.py
index 71bb9fcd..844e175f 100644
--- a/cryptography/hazmat/bindings/openssl/backend.py
+++ b/cryptography/hazmat/bindings/openssl/backend.py
@@ -63,9 +63,8 @@ class Backend(object):
     def __init__(self):
         self._ensure_ffi_initialized()
 
-        self.ciphers = Ciphers(self)
-        self.hashes = Hashes(self)
-        self.hmacs = HMACs(self)
+        self._cipher_registry = {}
+        self._register_default_ciphers()
 
     @classmethod
     def _ensure_ffi_initialized(cls):
@@ -123,6 +122,70 @@ class Backend(object):
         """
         return self.ffi.string(self.lib.OPENSSL_VERSION_TEXT).decode("ascii")
 
+    def create_hmac_ctx(self, key, algorithm):
+        return _HMACContext(self, key, algorithm)
+
+    def hash_supported(self, algorithm):
+        digest = self.lib.EVP_get_digestbyname(algorithm.name.encode("ascii"))
+        return digest != self.ffi.NULL
+
+    def create_hash_ctx(self, algorithm):
+        return _HashContext(self, algorithm)
+
+    def cipher_supported(self, cipher, mode):
+        try:
+            adapter = self._cipher_registry[type(cipher), type(mode)]
+        except KeyError:
+            return False
+        evp_cipher = adapter(self, cipher, mode)
+        return self.ffi.NULL != evp_cipher
+
+    def register_cipher_adapter(self, cipher_cls, mode_cls, adapter):
+        if (cipher_cls, mode_cls) in self._cipher_registry:
+            raise ValueError("Duplicate registration for: {0} {1}".format(
+                cipher_cls, mode_cls)
+            )
+        self._cipher_registry[cipher_cls, mode_cls] = adapter
+
+    def _register_default_ciphers(self):
+        for cipher_cls, mode_cls in itertools.product(
+            [AES, Camellia],
+            [CBC, CTR, ECB, OFB, CFB],
+        ):
+            self.register_cipher_adapter(
+                cipher_cls,
+                mode_cls,
+                GetCipherByName("{cipher.name}-{cipher.key_size}-{mode.name}")
+            )
+        for mode_cls in [CBC, CFB, OFB]:
+            self.register_cipher_adapter(
+                TripleDES,
+                mode_cls,
+                GetCipherByName("des-ede3-{mode.name}")
+            )
+        for mode_cls in [CBC, CFB, OFB, ECB]:
+            self.register_cipher_adapter(
+                Blowfish,
+                mode_cls,
+                GetCipherByName("bf-{mode.name}")
+            )
+        self.register_cipher_adapter(
+            CAST5,
+            ECB,
+            GetCipherByName("cast5-ecb")
+        )
+        self.register_cipher_adapter(
+            ARC4,
+            type(None),
+            GetCipherByName("rc4")
+        )
+
+    def create_symmetric_encryption_ctx(self, cipher, mode):
+        return _CipherContext(self, cipher, mode, _CipherContext._ENCRYPT)
+
+    def create_symmetric_decryption_ctx(self, cipher, mode):
+        return _CipherContext(self, cipher, mode, _CipherContext._DECRYPT)
+
 
 class GetCipherByName(object):
     def __init__(self, fmt):
@@ -145,7 +208,7 @@ class _CipherContext(object):
         ctx = self._backend.lib.EVP_CIPHER_CTX_new()
         ctx = self._backend.ffi.gc(ctx, self._backend.lib.EVP_CIPHER_CTX_free)
 
-        registry = self._backend.ciphers._cipher_registry
+        registry = self._backend._cipher_registry
         try:
             adapter = registry[type(cipher), type(mode)]
         except KeyError:
@@ -204,69 +267,6 @@ class _CipherContext(object):
         return self._backend.ffi.buffer(buf)[:outlen[0]]
 
 
-class Ciphers(object):
-    def __init__(self, backend):
-        self._backend = backend
-        self._cipher_registry = {}
-        self._register_default_ciphers()
-
-    def supported(self, cipher, mode):
-        try:
-            adapter = self._cipher_registry[type(cipher), type(mode)]
-        except KeyError:
-            return False
-        evp_cipher = adapter(self._backend, cipher, mode)
-        return self._backend.ffi.NULL != evp_cipher
-
-    def register_cipher_adapter(self, cipher_cls, mode_cls, adapter):
-        if (cipher_cls, mode_cls) in self._cipher_registry:
-            raise ValueError("Duplicate registration for: {0} {1}".format(
-                cipher_cls, mode_cls)
-            )
-        self._cipher_registry[cipher_cls, mode_cls] = adapter
-
-    def _register_default_ciphers(self):
-        for cipher_cls, mode_cls in itertools.product(
-            [AES, Camellia],
-            [CBC, CTR, ECB, OFB, CFB],
-        ):
-            self.register_cipher_adapter(
-                cipher_cls,
-                mode_cls,
-                GetCipherByName("{cipher.name}-{cipher.key_size}-{mode.name}")
-            )
-        for mode_cls in [CBC, CFB, OFB]:
-            self.register_cipher_adapter(
-                TripleDES,
-                mode_cls,
-                GetCipherByName("des-ede3-{mode.name}")
-            )
-        for mode_cls in [CBC, CFB, OFB, ECB]:
-            self.register_cipher_adapter(
-                Blowfish,
-                mode_cls,
-                GetCipherByName("bf-{mode.name}")
-            )
-        self.register_cipher_adapter(
-            CAST5,
-            ECB,
-            GetCipherByName("cast5-ecb")
-        )
-        self.register_cipher_adapter(
-            ARC4,
-            type(None),
-            GetCipherByName("rc4")
-        )
-
-    def create_encrypt_ctx(self, cipher, mode):
-        return _CipherContext(self._backend, cipher, mode,
-                              _CipherContext._ENCRYPT)
-
-    def create_decrypt_ctx(self, cipher, mode):
-        return _CipherContext(self._backend, cipher, mode,
-                              _CipherContext._DECRYPT)
-
-
 @interfaces.register(interfaces.HashContext)
 class _HashContext(object):
     def __init__(self, backend, algorithm, ctx=None):
@@ -310,20 +310,6 @@ class _HashContext(object):
         return self._backend.ffi.buffer(buf)[:]
 
 
-class Hashes(object):
-    def __init__(self, backend):
-        self._backend = backend
-
-    def supported(self, algorithm):
-        digest = self._backend.lib.EVP_get_digestbyname(
-            algorithm.name.encode("ascii")
-        )
-        return digest != self._backend.ffi.NULL
-
-    def create_ctx(self, algorithm):
-        return _HashContext(self._backend, algorithm)
-
-
 @interfaces.register(interfaces.HashContext)
 class _HMACContext(object):
     def __init__(self, backend, key, algorithm, ctx=None):
@@ -376,12 +362,4 @@ class _HMACContext(object):
         return self._backend.ffi.buffer(buf)[:]
 
 
-class HMACs(object):
-    def __init__(self, backend):
-        self._backend = backend
-
-    def create_ctx(self, key, algorithm):
-        return _HMACContext(self._backend, key, algorithm)
-
-
 backend = Backend()
diff --git a/cryptography/hazmat/primitives/ciphers/base.py b/cryptography/hazmat/primitives/ciphers/base.py
index d48f9cc7..794d0191 100644
--- a/cryptography/hazmat/primitives/ciphers/base.py
+++ b/cryptography/hazmat/primitives/ciphers/base.py
@@ -28,14 +28,14 @@ class Cipher(object):
         self._backend = backend
 
     def encryptor(self):
-        return _CipherContext(
-            self._backend.ciphers.create_encrypt_ctx(self.algorithm,
-                                                     self.mode))
+        return _CipherContext(self._backend.create_symmetric_encryption_ctx(
+            self.algorithm, self.mode
+        ))
 
     def decryptor(self):
-        return _CipherContext(
-            self._backend.ciphers.create_decrypt_ctx(self.algorithm,
-                                                     self.mode))
+        return _CipherContext(self._backend.create_symmetric_decryption_ctx(
+            self.algorithm, self.mode
+        ))
 
 
 @interfaces.register(interfaces.CipherContext)
diff --git a/cryptography/hazmat/primitives/hashes.py b/cryptography/hazmat/primitives/hashes.py
index 6ae622cd..3bd3ad46 100644
--- a/cryptography/hazmat/primitives/hashes.py
+++ b/cryptography/hazmat/primitives/hashes.py
@@ -32,7 +32,7 @@ class Hash(object):
         self._backend = backend
 
         if ctx is None:
-            self._ctx = self._backend.hashes.create_ctx(self.algorithm)
+            self._ctx = self._backend.create_hash_ctx(self.algorithm)
         else:
             self._ctx = ctx
 
diff --git a/cryptography/hazmat/primitives/hmac.py b/cryptography/hazmat/primitives/hmac.py
index 0f1b4fac..1a67b332 100644
--- a/cryptography/hazmat/primitives/hmac.py
+++ b/cryptography/hazmat/primitives/hmac.py
@@ -32,7 +32,7 @@ class HMAC(object):
         self._backend = backend
         self._key = key
         if ctx is None:
-            self._ctx = self._backend.hmacs.create_ctx(key, self.algorithm)
+            self._ctx = self._backend.create_hmac_ctx(key, self.algorithm)
         else:
             self._ctx = ctx
 
diff --git a/tests/hazmat/bindings/test_openssl.py b/tests/hazmat/bindings/test_openssl.py
index f1493e8d..241c6411 100644
--- a/tests/hazmat/bindings/test_openssl.py
+++ b/tests/hazmat/bindings/test_openssl.py
@@ -44,11 +44,11 @@ class TestOpenSSL(object):
         assert backend.openssl_version_text().startswith("OpenSSL")
 
     def test_supports_cipher(self):
-        assert backend.ciphers.supported(None, None) is False
+        assert backend.cipher_supported(None, None) is False
 
     def test_register_duplicate_cipher_adapter(self):
         with pytest.raises(ValueError):
-            backend.ciphers.register_cipher_adapter(AES, CBC, None)
+            backend.register_cipher_adapter(AES, CBC, None)
 
     def test_instances_share_ffi(self):
         b = Backend()
@@ -57,7 +57,7 @@ class TestOpenSSL(object):
 
     def test_nonexistent_cipher(self):
         b = Backend()
-        b.ciphers.register_cipher_adapter(
+        b.register_cipher_adapter(
             FakeCipher,
             FakeMode,
             lambda backend, cipher, mode: backend.ffi.NULL
diff --git a/tests/hazmat/primitives/test_aes.py b/tests/hazmat/primitives/test_aes.py
index 7c8cab72..d178da7b 100644
--- a/tests/hazmat/primitives/test_aes.py
+++ b/tests/hazmat/primitives/test_aes.py
@@ -127,7 +127,7 @@ class TestAES(object):
         ["aes-128-ctr.txt", "aes-192-ctr.txt", "aes-256-ctr.txt"],
         lambda key, iv: algorithms.AES(binascii.unhexlify(key)),
         lambda key, iv: modes.CTR(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.AES("\x00" * 16), modes.CTR("\x00" * 16)
         ),
         skip_message="Does not support AES CTR",
diff --git a/tests/hazmat/primitives/test_arc4.py b/tests/hazmat/primitives/test_arc4.py
index 302658f6..d233bec2 100644
--- a/tests/hazmat/primitives/test_arc4.py
+++ b/tests/hazmat/primitives/test_arc4.py
@@ -36,7 +36,7 @@ class TestARC4(object):
             "rfc-6229-256.txt",
         ],
         lambda key: algorithms.ARC4(binascii.unhexlify((key))),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.ARC4("\x00" * 16), None
         ),
         skip_message="Does not support ARC4",
diff --git a/tests/hazmat/primitives/test_blowfish.py b/tests/hazmat/primitives/test_blowfish.py
index eea0ac33..d5fbed6f 100644
--- a/tests/hazmat/primitives/test_blowfish.py
+++ b/tests/hazmat/primitives/test_blowfish.py
@@ -29,7 +29,7 @@ class TestBlowfish(object):
         ["bf-ecb.txt"],
         lambda key: algorithms.Blowfish(binascii.unhexlify(key)),
         lambda key: modes.ECB(),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Blowfish("\x00" * 56), modes.ECB()
         ),
         skip_message="Does not support Blowfish ECB",
@@ -41,7 +41,7 @@ class TestBlowfish(object):
         ["bf-cbc.txt"],
         lambda key, iv: algorithms.Blowfish(binascii.unhexlify(key)),
         lambda key, iv: modes.CBC(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Blowfish("\x00" * 56), modes.CBC("\x00" * 8)
         ),
         skip_message="Does not support Blowfish CBC",
@@ -53,7 +53,7 @@ class TestBlowfish(object):
         ["bf-ofb.txt"],
         lambda key, iv: algorithms.Blowfish(binascii.unhexlify(key)),
         lambda key, iv: modes.OFB(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Blowfish("\x00" * 56), modes.OFB("\x00" * 8)
         ),
         skip_message="Does not support Blowfish OFB",
@@ -65,7 +65,7 @@ class TestBlowfish(object):
         ["bf-cfb.txt"],
         lambda key, iv: algorithms.Blowfish(binascii.unhexlify(key)),
         lambda key, iv: modes.CFB(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Blowfish("\x00" * 56), modes.CFB("\x00" * 8)
         ),
         skip_message="Does not support Blowfish CFB",
diff --git a/tests/hazmat/primitives/test_camellia.py b/tests/hazmat/primitives/test_camellia.py
index 223269a2..a2c935d9 100644
--- a/tests/hazmat/primitives/test_camellia.py
+++ b/tests/hazmat/primitives/test_camellia.py
@@ -35,7 +35,7 @@ class TestCamellia(object):
         ],
         lambda key: algorithms.Camellia(binascii.unhexlify((key))),
         lambda key: modes.ECB(),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Camellia("\x00" * 16), modes.ECB()
         ),
         skip_message="Does not support Camellia ECB",
@@ -47,7 +47,7 @@ class TestCamellia(object):
         ["camellia-cbc.txt"],
         lambda key, iv: algorithms.Camellia(binascii.unhexlify(key)),
         lambda key, iv: modes.CBC(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Camellia("\x00" * 16), modes.CBC("\x00" * 16)
         ),
         skip_message="Does not support Camellia CBC",
@@ -59,7 +59,7 @@ class TestCamellia(object):
         ["camellia-ofb.txt"],
         lambda key, iv: algorithms.Camellia(binascii.unhexlify(key)),
         lambda key, iv: modes.OFB(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Camellia("\x00" * 16), modes.OFB("\x00" * 16)
         ),
         skip_message="Does not support Camellia OFB",
@@ -71,7 +71,7 @@ class TestCamellia(object):
         ["camellia-cfb.txt"],
         lambda key, iv: algorithms.Camellia(binascii.unhexlify(key)),
         lambda key, iv: modes.CFB(binascii.unhexlify(iv)),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.Camellia("\x00" * 16), modes.CFB("\x00" * 16)
         ),
         skip_message="Does not support Camellia CFB",
diff --git a/tests/hazmat/primitives/test_cast5.py b/tests/hazmat/primitives/test_cast5.py
index 486b5b5a..a283dafc 100644
--- a/tests/hazmat/primitives/test_cast5.py
+++ b/tests/hazmat/primitives/test_cast5.py
@@ -29,7 +29,7 @@ class TestCAST5(object):
         ["cast5-ecb.txt"],
         lambda key: algorithms.CAST5(binascii.unhexlify((key))),
         lambda key: modes.ECB(),
-        only_if=lambda backend: backend.ciphers.supported(
+        only_if=lambda backend: backend.cipher_supported(
             algorithms.CAST5("\x00" * 16), modes.ECB()
         ),
         skip_message="Does not support CAST5 ECB",
diff --git a/tests/hazmat/primitives/test_hash_vectors.py b/tests/hazmat/primitives/test_hash_vectors.py
index b08beca6..a8655812 100644
--- a/tests/hazmat/primitives/test_hash_vectors.py
+++ b/tests/hazmat/primitives/test_hash_vectors.py
@@ -30,7 +30,7 @@ class TestSHA1(object):
             "SHA1ShortMsg.rsp",
         ],
         hashes.SHA1(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA1),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA1),
         skip_message="Does not support SHA1",
     )
 
@@ -44,7 +44,7 @@ class TestSHA224(object):
             "SHA224ShortMsg.rsp",
         ],
         hashes.SHA224(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA224),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA224),
         skip_message="Does not support SHA224",
     )
 
@@ -58,7 +58,7 @@ class TestSHA256(object):
             "SHA256ShortMsg.rsp",
         ],
         hashes.SHA256(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA256),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA256),
         skip_message="Does not support SHA256",
     )
 
@@ -72,7 +72,7 @@ class TestSHA384(object):
             "SHA384ShortMsg.rsp",
         ],
         hashes.SHA384(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA384),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA384),
         skip_message="Does not support SHA384",
     )
 
@@ -86,7 +86,7 @@ class TestSHA512(object):
             "SHA512ShortMsg.rsp",
         ],
         hashes.SHA512(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA512),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA512),
         skip_message="Does not support SHA512",
     )
 
@@ -99,14 +99,14 @@ class TestRIPEMD160(object):
             "ripevectors.txt",
         ],
         hashes.RIPEMD160(),
-        only_if=lambda backend: backend.hashes.supported(hashes.RIPEMD160),
+        only_if=lambda backend: backend.hash_supported(hashes.RIPEMD160),
         skip_message="Does not support RIPEMD160",
     )
 
     test_RIPEMD160_long_string = generate_long_string_hash_test(
         hashes.RIPEMD160(),
         "52783243c1697bdbe16d37f97f68f08325dc1528",
-        only_if=lambda backend: backend.hashes.supported(hashes.RIPEMD160),
+        only_if=lambda backend: backend.hash_supported(hashes.RIPEMD160),
         skip_message="Does not support RIPEMD160",
     )
 
@@ -119,7 +119,7 @@ class TestWhirlpool(object):
             "iso-test-vectors.txt",
         ],
         hashes.Whirlpool(),
-        only_if=lambda backend: backend.hashes.supported(hashes.Whirlpool),
+        only_if=lambda backend: backend.hash_supported(hashes.Whirlpool),
         skip_message="Does not support Whirlpool",
     )
 
@@ -128,7 +128,7 @@ class TestWhirlpool(object):
         ("0c99005beb57eff50a7cf005560ddf5d29057fd86b2"
          "0bfd62deca0f1ccea4af51fc15490eddc47af32bb2b"
          "66c34ff9ad8c6008ad677f77126953b226e4ed8b01"),
-        only_if=lambda backend: backend.hashes.supported(hashes.Whirlpool),
+        only_if=lambda backend: backend.hash_supported(hashes.Whirlpool),
         skip_message="Does not support Whirlpool",
     )
 
@@ -141,6 +141,6 @@ class TestMD5(object):
             "rfc-1321.txt",
         ],
         hashes.MD5(),
-        only_if=lambda backend: backend.hashes.supported(hashes.MD5),
+        only_if=lambda backend: backend.hash_supported(hashes.MD5),
         skip_message="Does not support MD5",
     )
diff --git a/tests/hazmat/primitives/test_hashes.py b/tests/hazmat/primitives/test_hashes.py
index 6cdb0a07..c022f537 100644
--- a/tests/hazmat/primitives/test_hashes.py
+++ b/tests/hazmat/primitives/test_hashes.py
@@ -57,7 +57,7 @@ class TestSHA1(object):
         hashes.SHA1(),
         digest_size=20,
         block_size=64,
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA1),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA1),
         skip_message="Does not support SHA1",
     )
 
@@ -67,7 +67,7 @@ class TestSHA224(object):
         hashes.SHA224(),
         digest_size=28,
         block_size=64,
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA224),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA224),
         skip_message="Does not support SHA224",
     )
 
@@ -77,7 +77,7 @@ class TestSHA256(object):
         hashes.SHA256(),
         digest_size=32,
         block_size=64,
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA256),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA256),
         skip_message="Does not support SHA256",
     )
 
@@ -87,7 +87,7 @@ class TestSHA384(object):
         hashes.SHA384(),
         digest_size=48,
         block_size=128,
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA384),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA384),
         skip_message="Does not support SHA384",
     )
 
@@ -97,7 +97,7 @@ class TestSHA512(object):
         hashes.SHA512(),
         digest_size=64,
         block_size=128,
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA512),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA512),
         skip_message="Does not support SHA512",
     )
 
@@ -107,7 +107,7 @@ class TestRIPEMD160(object):
         hashes.RIPEMD160(),
         digest_size=20,
         block_size=64,
-        only_if=lambda backend: backend.hashes.supported(hashes.RIPEMD160),
+        only_if=lambda backend: backend.hash_supported(hashes.RIPEMD160),
         skip_message="Does not support RIPEMD160",
     )
 
@@ -117,7 +117,7 @@ class TestWhirlpool(object):
         hashes.Whirlpool(),
         digest_size=64,
         block_size=64,
-        only_if=lambda backend: backend.hashes.supported(hashes.Whirlpool),
+        only_if=lambda backend: backend.hash_supported(hashes.Whirlpool),
         skip_message="Does not support Whirlpool",
     )
 
@@ -127,6 +127,6 @@ class TestMD5(object):
         hashes.MD5(),
         digest_size=16,
         block_size=64,
-        only_if=lambda backend: backend.hashes.supported(hashes.MD5),
+        only_if=lambda backend: backend.hash_supported(hashes.MD5),
         skip_message="Does not support MD5",
     )
diff --git a/tests/hazmat/primitives/test_hmac.py b/tests/hazmat/primitives/test_hmac.py
index 0f627a10..4186967a 100644
--- a/tests/hazmat/primitives/test_hmac.py
+++ b/tests/hazmat/primitives/test_hmac.py
@@ -27,7 +27,7 @@ from .utils import generate_base_hmac_test
 class TestHMAC(object):
     test_copy = generate_base_hmac_test(
         hashes.MD5(),
-        only_if=lambda backend: backend.hashes.supported(hashes.MD5),
+        only_if=lambda backend: backend.hash_supported(hashes.MD5),
         skip_message="Does not support MD5",
     )
 
diff --git a/tests/hazmat/primitives/test_hmac_vectors.py b/tests/hazmat/primitives/test_hmac_vectors.py
index 570c3d46..7d0f156a 100644
--- a/tests/hazmat/primitives/test_hmac_vectors.py
+++ b/tests/hazmat/primitives/test_hmac_vectors.py
@@ -27,7 +27,7 @@ class TestHMAC_MD5(object):
             "rfc-2202-md5.txt",
         ],
         hashes.MD5(),
-        only_if=lambda backend: backend.hashes.supported(hashes.MD5),
+        only_if=lambda backend: backend.hash_supported(hashes.MD5),
         skip_message="Does not support MD5",
     )
 
@@ -40,7 +40,7 @@ class TestHMAC_SHA1(object):
             "rfc-2202-sha1.txt",
         ],
         hashes.SHA1(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA1),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA1),
         skip_message="Does not support SHA1",
     )
 
@@ -53,7 +53,7 @@ class TestHMAC_SHA224(object):
             "rfc-4231-sha224.txt",
         ],
         hashes.SHA224(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA224),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA224),
         skip_message="Does not support SHA224",
     )
 
@@ -66,7 +66,7 @@ class TestHMAC_SHA256(object):
             "rfc-4231-sha256.txt",
         ],
         hashes.SHA256(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA256),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA256),
         skip_message="Does not support SHA256",
     )
 
@@ -79,7 +79,7 @@ class TestHMAC_SHA384(object):
             "rfc-4231-sha384.txt",
         ],
         hashes.SHA384(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA384),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA384),
         skip_message="Does not support SHA384",
     )
 
@@ -92,7 +92,7 @@ class TestHMAC_SHA512(object):
             "rfc-4231-sha512.txt",
         ],
         hashes.SHA512(),
-        only_if=lambda backend: backend.hashes.supported(hashes.SHA512),
+        only_if=lambda backend: backend.hash_supported(hashes.SHA512),
         skip_message="Does not support SHA512",
     )
 
@@ -105,6 +105,6 @@ class TestHMAC_RIPEMD160(object):
             "rfc-2286-ripemd160.txt",
         ],
         hashes.RIPEMD160(),
-        only_if=lambda backend: backend.hashes.supported(hashes.RIPEMD160),
+        only_if=lambda backend: backend.hash_supported(hashes.RIPEMD160),
         skip_message="Does not support RIPEMD160",
     )