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usr / lib64 / python3.6 / site-packages / cryptography / hazmat / primitives / asymmetric /

?? ..
?? __init__.py(1020 B)
?? __pycache__
?? dh.py(5.53 KB)
?? dsa.py(7.01 KB)
?? ec.py(13.68 KB)
?? ed25519.py(2.34 KB)
?? ed448.py(2.27 KB)
?? padding.py(2.2 KB)
?? rsa.py(10.25 KB)
?? utils.py(1.33 KB)
?? x25519.py(2.22 KB)
?? x448.py(2.2 KB)

Editing: dh.py

# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

from __future__ import absolute_import, division, print_function

import abc

import six

from cryptography import utils
from cryptography.hazmat.backends import _get_backend

def generate_parameters(generator, key_size, backend=None):
    backend = _get_backend(backend)
    return backend.generate_dh_parameters(generator, key_size)

class DHPrivateNumbers(object):
    def __init__(self, x, public_numbers):
        if not isinstance(x, six.integer_types):
            raise TypeError("x must be an integer.")

if not isinstance(public_numbers, DHPublicNumbers):
            raise TypeError(
                "public_numbers must be an instance of " "DHPublicNumbers."
            )

self._x = x
        self._public_numbers = public_numbers

def __eq__(self, other):
        if not isinstance(other, DHPrivateNumbers):
            return NotImplemented

return (
            self._x == other._x
            and self._public_numbers == other._public_numbers
        )

def __ne__(self, other):
        return not self == other

def private_key(self, backend=None):
        backend = _get_backend(backend)
        return backend.load_dh_private_numbers(self)

public_numbers = utils.read_only_property("_public_numbers")
    x = utils.read_only_property("_x")

class DHPublicNumbers(object):
    def __init__(self, y, parameter_numbers):
        if not isinstance(y, six.integer_types):
            raise TypeError("y must be an integer.")

if not isinstance(parameter_numbers, DHParameterNumbers):
            raise TypeError(
                "parameters must be an instance of DHParameterNumbers."
            )

self._y = y
        self._parameter_numbers = parameter_numbers

def __eq__(self, other):
        if not isinstance(other, DHPublicNumbers):
            return NotImplemented

return (
            self._y == other._y
            and self._parameter_numbers == other._parameter_numbers
        )

def __ne__(self, other):
        return not self == other

def public_key(self, backend=None):
        backend = _get_backend(backend)
        return backend.load_dh_public_numbers(self)

y = utils.read_only_property("_y")
    parameter_numbers = utils.read_only_property("_parameter_numbers")

class DHParameterNumbers(object):
    def __init__(self, p, g, q=None):
        if not isinstance(p, six.integer_types) or not isinstance(
            g, six.integer_types
        ):
            raise TypeError("p and g must be integers")
        if q is not None and not isinstance(q, six.integer_types):
            raise TypeError("q must be integer or None")

if g < 2:
            raise ValueError("DH generator must be 2 or greater")

self._p = p
        self._g = g
        self._q = q

def __eq__(self, other):
        if not isinstance(other, DHParameterNumbers):
            return NotImplemented

return (
            self._p == other._p and self._g == other._g and self._q == other._q
        )

def __ne__(self, other):
        return not self == other

def parameters(self, backend=None):
        backend = _get_backend(backend)
        return backend.load_dh_parameter_numbers(self)

p = utils.read_only_property("_p")
    g = utils.read_only_property("_g")
    q = utils.read_only_property("_q")

@six.add_metaclass(abc.ABCMeta)
class DHParameters(object):
    @abc.abstractmethod
    def generate_private_key(self):
        """
        Generates and returns a DHPrivateKey.
        """

@abc.abstractmethod
    def parameter_bytes(self, encoding, format):
        """
        Returns the parameters serialized as bytes.
        """

@abc.abstractmethod
    def parameter_numbers(self):
        """
        Returns a DHParameterNumbers.
        """

DHParametersWithSerialization = DHParameters

@six.add_metaclass(abc.ABCMeta)
class DHPrivateKey(object):
    @abc.abstractproperty
    def key_size(self):
        """
        The bit length of the prime modulus.
        """

@abc.abstractmethod
    def public_key(self):
        """
        The DHPublicKey associated with this private key.
        """

@abc.abstractmethod
    def parameters(self):
        """
        The DHParameters object associated with this private key.
        """

@abc.abstractmethod
    def exchange(self, peer_public_key):
        """
        Given peer's DHPublicKey, carry out the key exchange and
        return shared key as bytes.
        """

@six.add_metaclass(abc.ABCMeta)
class DHPrivateKeyWithSerialization(DHPrivateKey):
    @abc.abstractmethod
    def private_numbers(self):
        """
        Returns a DHPrivateNumbers.
        """

@abc.abstractmethod
    def private_bytes(self, encoding, format, encryption_algorithm):
        """
        Returns the key serialized as bytes.
        """

@six.add_metaclass(abc.ABCMeta)
class DHPublicKey(object):
    @abc.abstractproperty
    def key_size(self):
        """
        The bit length of the prime modulus.
        """

@abc.abstractmethod
    def parameters(self):
        """
        The DHParameters object associated with this public key.
        """

@abc.abstractmethod
    def public_numbers(self):
        """
        Returns a DHPublicNumbers.
        """

@abc.abstractmethod
    def public_bytes(self, encoding, format):
        """
        Returns the key serialized as bytes.
        """

DHPublicKeyWithSerialization = DHPublicKey

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