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}a=J Je8pLm1h 0 """Crypto utilities."""
import binascii
import contextlib
import logging
import os
import re
import socket
import josepy as jose
from OpenSSL import crypto
from OpenSSL import SSL # type: ignore # https://github.com/python/typeshed/issues/2052
from acme import errors
from acme.magic_typing import Callable
from acme.magic_typing import Tuple
from acme.magic_typing import Union
logger = logging.getLogger(__name__)
# Default SSL method selected here is the most compatible, while secure
# SSL method: TLSv1_METHOD is only compatible with
# TLSv1_METHOD, while SSLv23_METHOD is compatible with all other
# methods, including TLSv2_METHOD (read more at
# https://www.openssl.org/docs/ssl/SSLv23_method.html). _serve_sni
# should be changed to use "set_options" to disable SSLv2 and SSLv3,
# in case it's used for things other than probing/serving!
_DEFAULT_SSL_METHOD = SSL.SSLv23_METHOD # type: ignore
class _DefaultCertSelection(object):
def __init__(self, certs):
self.certs = certs
def __call__(self, connection):
server_name = connection.get_servername()
return self.certs.get(server_name, None)
class SSLSocket(object): # pylint: disable=too-few-public-methods
"""SSL wrapper for sockets.
:ivar socket sock: Original wrapped socket.
:ivar dict certs: Mapping from domain names (`bytes`) to
`OpenSSL.crypto.X509`.
:ivar method: See `OpenSSL.SSL.Context` for allowed values.
:ivar alpn_selection: Hook to select negotiated ALPN protocol for
connection.
:ivar cert_selection: Hook to select certificate for connection. If given,
`certs` parameter would be ignored, and therefore must be empty.
"""
def __init__(self, sock, certs=None,
method=_DEFAULT_SSL_METHOD, alpn_selection=None,
cert_selection=None):
self.sock = sock
self.alpn_selection = alpn_selection
self.method = method