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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 six
from cryptography import utils
from cryptography.hazmat.primitives import interfaces
@utils.register_interface(interfaces.AsymmetricPadding)
class PKCS1v15(object):
name = "EMSA-PKCS1-v1_5"
@utils.register_interface(interfaces.AsymmetricPadding)
class PSS(object):
MAX_LENGTH = object()
name = "EMSA-PSS"
def __init__(self, mgf, salt_length):
self._mgf = mgf
if (not isinstance(salt_length, six.integer_types) and
salt_length is not self.MAX_LENGTH):
raise TypeError("salt_length must be an integer.")
if salt_length is not self.MAX_LENGTH and salt_length < 0:
raise ValueError("salt_length must be zero or greater.")
self._salt_length = salt_length
@utils.register_interface(interfaces.AsymmetricPadding)
class OAEP(object):
name = "EME-OAEP"
def __init__(self, mgf, algorithm, label):
if not isinstance(algorithm, interfaces.HashAlgorithm):
raise TypeError("Expected instance of interfaces.HashAlgorithm.")
self._mgf = mgf
self._algorithm = algorithm
self._label = label
class MGF1(object):
MAX_LENGTH = object()
def __init__(self, algorithm):
if not isinstance(algorithm, interfaces.HashAlgorithm):
raise TypeError("Expected instance of interfaces.HashAlgorithm.")
self._algorithm = algorithm
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