remove CAST5 for first release

cryptography/hazmat/backends/openssl/backend.py

@@ -22,7 +22,7 @@ from cryptography.hazmat.backends.interfaces import (
 )
 from cryptography.hazmat.primitives import interfaces
 from cryptography.hazmat.primitives.ciphers.algorithms import (
-    AES, Blowfish, Camellia, CAST5, TripleDES, ARC4,
+    AES, Blowfish, Camellia, TripleDES, ARC4,
 )
 from cryptography.hazmat.primitives.ciphers.modes import (
     CBC, CTR, ECB, OFB, CFB, GCM,
@@ -107,11 +107,6 @@ class Backend(object):
                 mode_cls,
                 GetCipherByName("bf-{mode.name}")
             )
-        self.register_cipher_adapter(
-            CAST5,
-            ECB,
-            GetCipherByName("cast5-ecb")
-        )
         self.register_cipher_adapter(
             ARC4,
             type(None),

cryptography/hazmat/primitives/ciphers/algorithms.py

@@ -90,21 +90,6 @@ class Blowfish(object):
         return len(self.key) * 8
 
 
-@utils.register_interface(interfaces.BlockCipherAlgorithm)
-@utils.register_interface(interfaces.CipherAlgorithm)
-class CAST5(object):
-    name = "CAST5"
-    block_size = 64
-    key_sizes = frozenset(range(40, 129, 8))
-
-    def __init__(self, key):
-        self.key = _verify_key_size(self, key)
-
-    @property
-    def key_size(self):
-        return len(self.key) * 8
-
-
 @utils.register_interface(interfaces.CipherAlgorithm)
 class ARC4(object):
     name = "RC4"

tests/hazmat/primitives/test_cast5.py

@@ -1,41 +0,0 @@
-# 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
-
-import binascii
-import os
-
-import pytest
-
-from cryptography.hazmat.primitives.ciphers import algorithms, modes
-
-from .utils import generate_encrypt_test
-from ...utils import load_nist_vectors
-
-
-@pytest.mark.supported(
-    only_if=lambda backend: backend.cipher_supported(
-        algorithms.CAST5("\x00" * 16), modes.ECB()
-    ),
-    skip_message="Does not support CAST5 ECB",
-)
-@pytest.mark.cipher
-class TestCAST5(object):
-    test_ECB = generate_encrypt_test(
-        load_nist_vectors,
-        os.path.join("ciphers", "CAST5"),
-        ["cast5-ecb.txt"],
-        lambda key, **kwargs: algorithms.CAST5(binascii.unhexlify((key))),
-        lambda **kwargs: modes.ECB(),
-    )

tests/hazmat/primitives/test_ciphers.py

@@ -18,7 +18,7 @@ import binascii
 import pytest
 
 from cryptography.hazmat.primitives.ciphers.algorithms import (
-    AES, Camellia, TripleDES, Blowfish, CAST5, ARC4
+    AES, Camellia, TripleDES, Blowfish, ARC4
 )
 
 
@@ -80,19 +80,6 @@ class TestBlowfish(object):
             Blowfish(binascii.unhexlify(b"0" * 6))
 
 
-class TestCAST5(object):
-    @pytest.mark.parametrize(("key", "keysize"), [
-        (b"0" * (keysize // 4), keysize) for keysize in range(40, 129, 8)
-    ])
-    def test_key_size(self, key, keysize):
-        cipher = CAST5(binascii.unhexlify(key))
-        assert cipher.key_size == keysize
-
-    def test_invalid_key_size(self):
-        with pytest.raises(ValueError):
-            CAST5(binascii.unhexlify(b"0" * 34))
-
-
 class TestARC4(object):
     @pytest.mark.parametrize(("key", "keysize"), [
         (b"0" * 10, 40),