Ausgabe der neuen DB Einträge

venv/lib/python3.9/site-packages/cryptography/hazmat/primitives/asymmetric/dh.py

@@ -0,0 +1,216 @@
+# 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