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# 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 pytest
from cryptography.exceptions import _Reasons
from cryptography.hazmat.primitives import ciphers
from cryptography.hazmat.primitives.ciphers.algorithms import (
AES, ARC4, Blowfish, CAST5, Camellia, IDEA, TripleDES
)
from cryptography.hazmat.primitives.ciphers.modes import ECB
from ...utils import raises_unsupported_algorithm
class TestAES(object):
@pytest.mark.parametrize(("key", "keysize"), [
(b"0" * 32, 128),
(b"0" * 48, 192),
(b"0" * 64, 256),
])
def test_key_size(self, key, keysize):
cipher = AES(binascii.unhexlify(key))
assert cipher.key_size == keysize
def test_invalid_key_size(self):
with pytest.raises(ValueError):
AES(binascii.unhexlify(b"0" * 12))
class TestCamellia(object):
@pytest.mark.parametrize(("key", "keysize"), [
(b"0" * 32, 128),
(b"0" * 48, 192),
(b"0" * 64, 256),
])
def test_key_size(self, key, keysize):
cipher = Camellia(binascii.unhexlify(key))
assert cipher.key_size == keysize
def test_invalid_key_size(self):
with pytest.raises(ValueError):
Camellia(binascii.unhexlify(b"0" * 12))
class TestTripleDES(object):
@pytest.mark.parametrize("key", [
b"0" * 16,
b"0" * 32,
b"0" * 48,
])
def test_key_size(self, key):
cipher = TripleDES(binascii.unhexlify(key))
assert cipher.key_size == 192
def test_invalid_key_size(self):
with pytest.raises(ValueError):
TripleDES(binascii.unhexlify(b"0" * 12))
class TestBlowfish(object):
@pytest.mark.parametrize(("key", "keysize"), [
(b"0" * (keysize // 4), keysize) for keysize in range(32, 449, 8)
])
def test_key_size(self, key, keysize):
cipher = Blowfish(binascii.unhexlify(key))
assert cipher.key_size == keysize
def test_invalid_key_size(self):
with pytest.raises(ValueError):
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),
(b"0" * 14, 56),
(b"0" * 16, 64),
(b"0" * 20, 80),
(b"0" * 32, 128),
(b"0" * 48, 192),
(b"0" * 64, 256),
])
def test_key_size(self, key, keysize):
cipher = ARC4(binascii.unhexlify(key))
assert cipher.key_size == keysize
def test_invalid_key_size(self):
with pytest.raises(ValueError):
ARC4(binascii.unhexlify(b"0" * 34))
class TestIDEA(object):
def test_key_size(self):
cipher = IDEA(b"\x00" * 16)
assert cipher.key_size == 128
def test_invalid_key_size(self):
with pytest.raises(ValueError):
IDEA(b"\x00" * 17)
def test_invalid_backend():
pretend_backend = object()
with raises_unsupported_algorithm(_Reasons.BACKEND_MISSING_INTERFACE):
ciphers.Cipher(AES(b"AAAAAAAAAAAAAAAA"), ECB, pretend_backend)
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