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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: dsa.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

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

@six.add_metaclass(abc.ABCMeta)
class DSAParametersWithNumbers(DSAParameters):
    @abc.abstractmethod
    def parameter_numbers(self):
        """
        Returns a DSAParameterNumbers.
        """

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

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

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

@abc.abstractmethod
    def signer(self, signature_algorithm):
        """
        Returns an AsymmetricSignatureContext used for signing data.
        """

@abc.abstractmethod
    def sign(self, data, algorithm):
        """
        Signs the data
        """

@six.add_metaclass(abc.ABCMeta)
class DSAPrivateKeyWithSerialization(DSAPrivateKey):
    @abc.abstractmethod
    def private_numbers(self):
        """
        Returns a DSAPrivateNumbers.
        """

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

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

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

@abc.abstractmethod
    def verifier(self, signature, signature_algorithm):
        """
        Returns an AsymmetricVerificationContext used for signing data.
        """

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

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

@abc.abstractmethod
    def verify(self, signature, data, algorithm):
        """
        Verifies the signature of the data.
        """

DSAPublicKeyWithSerialization = DSAPublicKey

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

def generate_private_key(key_size, backend=None):
    backend = _get_backend(backend)
    return backend.generate_dsa_private_key_and_parameters(key_size)

def _check_dsa_parameters(parameters):
    if parameters.p.bit_length() not in [1024, 2048, 3072, 4096]:
        raise ValueError(
            "p must be exactly 1024, 2048, 3072, or 4096 bits long"
        )
    if parameters.q.bit_length() not in [160, 224, 256]:
        raise ValueError("q must be exactly 160, 224, or 256 bits long")

if not (1 < parameters.g < parameters.p):
        raise ValueError("g, p don't satisfy 1 < g < p.")

def _check_dsa_private_numbers(numbers):
    parameters = numbers.public_numbers.parameter_numbers
    _check_dsa_parameters(parameters)
    if numbers.x <= 0 or numbers.x >= parameters.q:
        raise ValueError("x must be > 0 and < q.")

if numbers.public_numbers.y != pow(parameters.g, numbers.x, parameters.p):
        raise ValueError("y must be equal to (g ** x % p).")

class DSAParameterNumbers(object):
    def __init__(self, p, q, g):
        if (
            not isinstance(p, six.integer_types)
            or not isinstance(q, six.integer_types)
            or not isinstance(g, six.integer_types)
        ):
            raise TypeError(
                "DSAParameterNumbers p, q, and g arguments must be integers."
            )

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

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

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

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

return self.p == other.p and self.q == other.q and self.g == other.g

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

def __repr__(self):
        return (
            "<DSAParameterNumbers(p={self.p}, q={self.q}, "
            "g={self.g})>".format(self=self)
        )

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

if not isinstance(parameter_numbers, DSAParameterNumbers):
            raise TypeError(
                "parameter_numbers must be a DSAParameterNumbers instance."
            )

self._y = y
        self._parameter_numbers = parameter_numbers

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

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

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

return (
            self.y == other.y
            and self.parameter_numbers == other.parameter_numbers
        )

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

def __repr__(self):
        return (
            "<DSAPublicNumbers(y={self.y}, "
            "parameter_numbers={self.parameter_numbers})>".format(self=self)
        )

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

if not isinstance(public_numbers, DSAPublicNumbers):
            raise TypeError(
                "public_numbers must be a DSAPublicNumbers instance."
            )
        self._public_numbers = public_numbers
        self._x = x

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

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

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

return (
            self.x == other.x and self.public_numbers == other.public_numbers
        )

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

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