Move interfaces.register to utils.register_interface in preparation for more interface modules.

9 files changed, 59 insertions, 38 deletions

diff --git a/cryptography/hazmat/bindings/openssl/backend.py b/cryptography/hazmat/bindings/openssl/backend.py
index 844e175f..92cd3868 100644
--- a/cryptography/hazmat/bindings/openssl/backend.py
+++ b/cryptography/hazmat/bindings/openssl/backend.py
@@ -18,6 +18,7 @@ import sys
 
 import cffi
 
+from cryptography import utils
 from cryptography.exceptions import UnsupportedAlgorithm
 from cryptography.hazmat.primitives import interfaces
 from cryptography.hazmat.primitives.ciphers.algorithms import (
@@ -196,7 +197,7 @@ class GetCipherByName(object):
         return backend.lib.EVP_get_cipherbyname(cipher_name.encode("ascii"))
 
 
-@interfaces.register(interfaces.CipherContext)
+@utils.register_interface(interfaces.CipherContext)
 class _CipherContext(object):
     _ENCRYPT = 1
     _DECRYPT = 0
@@ -267,7 +268,7 @@ class _CipherContext(object):
         return self._backend.ffi.buffer(buf)[:outlen[0]]
 
 
-@interfaces.register(interfaces.HashContext)
+@utils.register_interface(interfaces.HashContext)
 class _HashContext(object):
     def __init__(self, backend, algorithm, ctx=None):
         self.algorithm = algorithm
@@ -310,7 +311,7 @@ class _HashContext(object):
         return self._backend.ffi.buffer(buf)[:]
 
 
-@interfaces.register(interfaces.HashContext)
+@utils.register_interface(interfaces.HashContext)
 class _HMACContext(object):
     def __init__(self, backend, key, algorithm, ctx=None):
         self.algorithm = algorithm
diff --git a/cryptography/hazmat/primitives/ciphers/algorithms.py b/cryptography/hazmat/primitives/ciphers/algorithms.py
index 1ed487b6..75a87265 100644
--- a/cryptography/hazmat/primitives/ciphers/algorithms.py
+++ b/cryptography/hazmat/primitives/ciphers/algorithms.py
@@ -13,10 +13,11 @@
 
 from __future__ import absolute_import, division, print_function
 
+from cryptography import utils
 from cryptography.hazmat.primitives import interfaces
 
 
-@interfaces.register(interfaces.CipherAlgorithm)
+@utils.register_interface(interfaces.CipherAlgorithm)
 class AES(object):
     name = "AES"
     block_size = 128
@@ -36,7 +37,7 @@ class AES(object):
         return len(self.key) * 8
 
 
-@interfaces.register(interfaces.CipherAlgorithm)
+@utils.register_interface(interfaces.CipherAlgorithm)
 class Camellia(object):
     name = "camellia"
     block_size = 128
@@ -56,7 +57,7 @@ class Camellia(object):
         return len(self.key) * 8
 
 
-@interfaces.register(interfaces.CipherAlgorithm)
+@utils.register_interface(interfaces.CipherAlgorithm)
 class TripleDES(object):
     name = "3DES"
     block_size = 64
@@ -80,7 +81,7 @@ class TripleDES(object):
         return len(self.key) * 8
 
 
-@interfaces.register(interfaces.CipherAlgorithm)
+@utils.register_interface(interfaces.CipherAlgorithm)
 class Blowfish(object):
     name = "Blowfish"
     block_size = 64
@@ -100,7 +101,7 @@ class Blowfish(object):
         return len(self.key) * 8
 
 
-@interfaces.register(interfaces.CipherAlgorithm)
+@utils.register_interface(interfaces.CipherAlgorithm)
 class CAST5(object):
     name = "CAST5"
     block_size = 64
@@ -120,7 +121,7 @@ class CAST5(object):
         return len(self.key) * 8
 
 
-@interfaces.register(interfaces.CipherAlgorithm)
+@utils.register_interface(interfaces.CipherAlgorithm)
 class ARC4(object):
     name = "RC4"
     block_size = 1
diff --git a/cryptography/hazmat/primitives/ciphers/base.py b/cryptography/hazmat/primitives/ciphers/base.py
index 78bf7e0c..3d733afc 100644
--- a/cryptography/hazmat/primitives/ciphers/base.py
+++ b/cryptography/hazmat/primitives/ciphers/base.py
@@ -13,6 +13,7 @@
 
 from __future__ import absolute_import, division, print_function
 
+from cryptography import utils
 from cryptography.exceptions import AlreadyFinalized
 from cryptography.hazmat.primitives import interfaces
 
@@ -42,7 +43,7 @@ class Cipher(object):
         ))
 
 
-@interfaces.register(interfaces.CipherContext)
+@utils.register_interface(interfaces.CipherContext)
 class _CipherContext(object):
     def __init__(self, ctx):
         self._ctx = ctx
diff --git a/cryptography/hazmat/primitives/ciphers/modes.py b/cryptography/hazmat/primitives/ciphers/modes.py
index 915fd83d..1d0de689 100644
--- a/cryptography/hazmat/primitives/ciphers/modes.py
+++ b/cryptography/hazmat/primitives/ciphers/modes.py
@@ -13,11 +13,12 @@
 
 from __future__ import absolute_import, division, print_function
 
+from cryptography import utils
 from cryptography.hazmat.primitives import interfaces
 
 
-@interfaces.register(interfaces.Mode)
-@interfaces.register(interfaces.ModeWithInitializationVector)
+@utils.register_interface(interfaces.Mode)
+@utils.register_interface(interfaces.ModeWithInitializationVector)
 class CBC(object):
     name = "CBC"
 
@@ -25,13 +26,13 @@ class CBC(object):
         self.initialization_vector = initialization_vector
 
 
-@interfaces.register(interfaces.Mode)
+@utils.register_interface(interfaces.Mode)
 class ECB(object):
     name = "ECB"
 
 
-@interfaces.register(interfaces.Mode)
-@interfaces.register(interfaces.ModeWithInitializationVector)
+@utils.register_interface(interfaces.Mode)
+@utils.register_interface(interfaces.ModeWithInitializationVector)
 class OFB(object):
     name = "OFB"
 
@@ -39,8 +40,8 @@ class OFB(object):
         self.initialization_vector = initialization_vector
 
 
-@interfaces.register(interfaces.Mode)
-@interfaces.register(interfaces.ModeWithInitializationVector)
+@utils.register_interface(interfaces.Mode)
+@utils.register_interface(interfaces.ModeWithInitializationVector)
 class CFB(object):
     name = "CFB"
 
@@ -48,8 +49,8 @@ class CFB(object):
         self.initialization_vector = initialization_vector
 
 
-@interfaces.register(interfaces.Mode)
-@interfaces.register(interfaces.ModeWithNonce)
+@utils.register_interface(interfaces.Mode)
+@utils.register_interface(interfaces.ModeWithNonce)
 class CTR(object):
     name = "CTR"
 
diff --git a/cryptography/hazmat/primitives/hashes.py b/cryptography/hazmat/primitives/hashes.py
index 86c9fe2e..93fc8c42 100644
--- a/cryptography/hazmat/primitives/hashes.py
+++ b/cryptography/hazmat/primitives/hashes.py
@@ -15,11 +15,12 @@ from __future__ import absolute_import, division, print_function
 
 import six
 
+from cryptography import utils
 from cryptography.exceptions import AlreadyFinalized
 from cryptography.hazmat.primitives import interfaces
 
 
-@interfaces.register(interfaces.HashContext)
+@utils.register_interface(interfaces.HashContext)
 class Hash(object):
     def __init__(self, algorithm, backend=None, ctx=None):
         if not isinstance(algorithm, interfaces.HashAlgorithm):
@@ -59,56 +60,56 @@ class Hash(object):
         return digest
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class SHA1(object):
     name = "sha1"
     digest_size = 20
     block_size = 64
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class SHA224(object):
     name = "sha224"
     digest_size = 28
     block_size = 64
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class SHA256(object):
     name = "sha256"
     digest_size = 32
     block_size = 64
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class SHA384(object):
     name = "sha384"
     digest_size = 48
     block_size = 128
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class SHA512(object):
     name = "sha512"
     digest_size = 64
     block_size = 128
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class RIPEMD160(object):
     name = "ripemd160"
     digest_size = 20
     block_size = 64
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class Whirlpool(object):
     name = "whirlpool"
     digest_size = 64
     block_size = 64
 
 
-@interfaces.register(interfaces.HashAlgorithm)
+@utils.register_interface(interfaces.HashAlgorithm)
 class MD5(object):
     name = "md5"
     digest_size = 16
diff --git a/cryptography/hazmat/primitives/hmac.py b/cryptography/hazmat/primitives/hmac.py
index 1bbe39c7..08dfae01 100644
--- a/cryptography/hazmat/primitives/hmac.py
+++ b/cryptography/hazmat/primitives/hmac.py
@@ -15,11 +15,12 @@ from __future__ import absolute_import, division, print_function
 
 import six
 
+from cryptography import utils
 from cryptography.exceptions import AlreadyFinalized
 from cryptography.hazmat.primitives import interfaces
 
 
-@interfaces.register(interfaces.HashContext)
+@utils.register_interface(interfaces.HashContext)
 class HMAC(object):
     def __init__(self, key, algorithm, ctx=None, backend=None):
         if not isinstance(algorithm, interfaces.HashAlgorithm):
diff --git a/cryptography/hazmat/primitives/interfaces.py b/cryptography/hazmat/primitives/interfaces.py
index bbbb266c..8cc9d42c 100644
--- a/cryptography/hazmat/primitives/interfaces.py
+++ b/cryptography/hazmat/primitives/interfaces.py
@@ -18,13 +18,6 @@ import abc
 import six
 
 
-def register(iface):
-    def register_decorator(klass):
-        iface.register(klass)
-        return klass
-    return register_decorator
-
-
 class CipherAlgorithm(six.with_metaclass(abc.ABCMeta)):
     @abc.abstractproperty
     def name(self):
diff --git a/cryptography/hazmat/primitives/padding.py b/cryptography/hazmat/primitives/padding.py
index f41c62c3..2dbac752 100644
--- a/cryptography/hazmat/primitives/padding.py
+++ b/cryptography/hazmat/primitives/padding.py
@@ -13,6 +13,7 @@
 
 import six
 
+from cryptography import utils
 from cryptography.hazmat.primitives import interfaces
 
 
@@ -33,7 +34,7 @@ class PKCS7(object):
         return _PKCS7UnpaddingContext(self.block_size)
 
 
-@interfaces.register(interfaces.PaddingContext)
+@utils.register_interface(interfaces.PaddingContext)
 class _PKCS7PaddingContext(object):
     def __init__(self, block_size):
         self.block_size = block_size
@@ -67,7 +68,7 @@ class _PKCS7PaddingContext(object):
         return result
 
 
-@interfaces.register(interfaces.PaddingContext)
+@utils.register_interface(interfaces.PaddingContext)
 class _PKCS7UnpaddingContext(object):
     def __init__(self, block_size):
         self.block_size = block_size
diff --git a/cryptography/utils.py b/cryptography/utils.py
new file mode 100644
index 00000000..e697d515
--- /dev/null
+++ b/cryptography/utils.py
@@ -0,0 +1,21 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
+
+def register_interface(iface):
+    def register_decorator(klass):
+        iface.register(klass)
+        return klass
+    return register_decorator