mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-29 06:32:40 -06:00
410 lines
15 KiB
Python
410 lines
15 KiB
Python
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# Wrapper module for _ssl. Written by Bill Janssen.
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# Ported to gevent by Denis Bilenko.
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"""SSL wrapper for socket objects.
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For the documentation, refer to :mod:`ssl` module manual.
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This module implements cooperative SSL socket wrappers.
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On Python 2.6 and newer it uses Python's native :mod:`ssl` module. On Python 2.5 and 2.4
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it requires `ssl package`_ to be installed.
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.. _`ssl package`: http://pypi.python.org/pypi/ssl
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"""
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from __future__ import absolute_import
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import ssl as __ssl__
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try:
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_ssl = __ssl__._ssl
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except AttributeError:
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_ssl = __ssl__._ssl2
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import sys
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import errno
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from gevent.socket import socket, _fileobject, timeout_default
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from gevent.socket import error as socket_error
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from gevent.hub import string_types
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__implements__ = ['SSLSocket',
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'wrap_socket',
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'get_server_certificate',
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'sslwrap_simple']
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__imports__ = ['SSLError',
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'RAND_status',
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'RAND_egd',
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'RAND_add',
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'cert_time_to_seconds',
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'get_protocol_name',
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'DER_cert_to_PEM_cert',
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'PEM_cert_to_DER_cert']
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for name in __imports__[:]:
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try:
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value = getattr(__ssl__, name)
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globals()[name] = value
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except AttributeError:
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__imports__.remove(name)
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for name in dir(__ssl__):
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if not name.startswith('_'):
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value = getattr(__ssl__, name)
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if isinstance(value, (int, long, tuple)) or isinstance(value, string_types):
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globals()[name] = value
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__imports__.append(name)
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del name, value
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__all__ = __implements__ + __imports__
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class SSLSocket(socket):
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def __init__(self, sock, keyfile=None, certfile=None,
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server_side=False, cert_reqs=CERT_NONE,
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ssl_version=PROTOCOL_SSLv23, ca_certs=None,
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do_handshake_on_connect=True,
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suppress_ragged_eofs=True,
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ciphers=None):
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socket.__init__(self, _sock=sock)
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if certfile and not keyfile:
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keyfile = certfile
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# see if it's connected
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try:
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socket.getpeername(self)
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except socket_error, e:
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if e[0] != errno.ENOTCONN:
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raise
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# no, no connection yet
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self._sslobj = None
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else:
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# yes, create the SSL object
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if ciphers is None:
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self._sslobj = _ssl.sslwrap(self._sock, server_side,
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keyfile, certfile,
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cert_reqs, ssl_version, ca_certs)
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else:
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self._sslobj = _ssl.sslwrap(self._sock, server_side,
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keyfile, certfile,
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cert_reqs, ssl_version, ca_certs,
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ciphers)
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if do_handshake_on_connect:
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self.do_handshake()
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self.keyfile = keyfile
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self.certfile = certfile
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self.cert_reqs = cert_reqs
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self.ssl_version = ssl_version
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self.ca_certs = ca_certs
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self.ciphers = ciphers
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self.do_handshake_on_connect = do_handshake_on_connect
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self.suppress_ragged_eofs = suppress_ragged_eofs
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self._makefile_refs = 0
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def read(self, len=1024):
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"""Read up to LEN bytes and return them.
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Return zero-length string on EOF."""
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while True:
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try:
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return self._sslobj.read(len)
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except SSLError:
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ex = sys.exc_info()[1]
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if ex.args[0] == SSL_ERROR_EOF and self.suppress_ragged_eofs:
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return ''
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elif ex.args[0] == SSL_ERROR_WANT_READ:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._read_event, timeout_exc=_SSLErrorReadTimeout)
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elif ex.args[0] == SSL_ERROR_WANT_WRITE:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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# note: using _SSLErrorReadTimeout rather than _SSLErrorWriteTimeout below is intentional
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self._wait(self._write_event, timeout_exc=_SSLErrorReadTimeout)
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else:
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raise
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def write(self, data):
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"""Write DATA to the underlying SSL channel. Returns
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number of bytes of DATA actually transmitted."""
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while True:
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try:
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return self._sslobj.write(data)
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except SSLError:
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ex = sys.exc_info()[1]
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if ex.args[0] == SSL_ERROR_WANT_READ:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._read_event, timeout_exc=_SSLErrorWriteTimeout)
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elif ex.args[0] == SSL_ERROR_WANT_WRITE:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._write_event, timeout_exc=_SSLErrorWriteTimeout)
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else:
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raise
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def getpeercert(self, binary_form=False):
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"""Returns a formatted version of the data in the
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certificate provided by the other end of the SSL channel.
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Return None if no certificate was provided, {} if a
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certificate was provided, but not validated."""
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return self._sslobj.peer_certificate(binary_form)
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def cipher(self):
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if not self._sslobj:
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return None
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else:
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return self._sslobj.cipher()
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def send(self, data, flags=0, timeout=timeout_default):
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if timeout is timeout_default:
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timeout = self.timeout
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if self._sslobj:
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if flags != 0:
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raise ValueError(
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"non-zero flags not allowed in calls to send() on %s" %
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self.__class__)
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while True:
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try:
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v = self._sslobj.write(data)
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except SSLError:
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x = sys.exc_info()[1]
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if x.args[0] == SSL_ERROR_WANT_READ:
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if self.timeout == 0.0:
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return 0
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sys.exc_clear()
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self._wait(self._read_event)
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elif x.args[0] == SSL_ERROR_WANT_WRITE:
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if self.timeout == 0.0:
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return 0
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sys.exc_clear()
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self._wait(self._write_event)
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else:
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raise
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else:
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return v
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else:
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return socket.send(self, data, flags, timeout)
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# is it possible for sendall() to send some data without encryption if another end shut down SSL?
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def sendto(self, *args):
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if self._sslobj:
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raise ValueError("sendto not allowed on instances of %s" %
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self.__class__)
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else:
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return socket.sendto(self, *args)
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def recv(self, buflen=1024, flags=0):
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if self._sslobj:
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if flags != 0:
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raise ValueError(
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"non-zero flags not allowed in calls to recv() on %s" %
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self.__class__)
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# QQQ Shouldn't we wrap the SSL_WANT_READ errors as socket.timeout errors to match socket.recv's behavior?
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return self.read(buflen)
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else:
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return socket.recv(self, buflen, flags)
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def recv_into(self, buffer, nbytes=None, flags=0):
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if buffer and (nbytes is None):
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nbytes = len(buffer)
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elif nbytes is None:
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nbytes = 1024
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if self._sslobj:
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if flags != 0:
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raise ValueError(
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"non-zero flags not allowed in calls to recv_into() on %s" %
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self.__class__)
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while True:
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try:
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tmp_buffer = self.read(nbytes)
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v = len(tmp_buffer)
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buffer[:v] = tmp_buffer
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return v
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except SSLError:
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x = sys.exc_info()[1]
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if x.args[0] == SSL_ERROR_WANT_READ:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._read_event)
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continue
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else:
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raise
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else:
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return socket.recv_into(self, buffer, nbytes, flags)
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def recvfrom(self, *args):
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if self._sslobj:
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raise ValueError("recvfrom not allowed on instances of %s" %
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self.__class__)
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else:
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return socket.recvfrom(self, *args)
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def recvfrom_into(self, *args):
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if self._sslobj:
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raise ValueError("recvfrom_into not allowed on instances of %s" %
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self.__class__)
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else:
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return socket.recvfrom_into(self, *args)
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def pending(self):
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if self._sslobj:
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return self._sslobj.pending()
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else:
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return 0
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def _sslobj_shutdown(self):
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while True:
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try:
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return self._sslobj.shutdown()
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except SSLError:
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ex = sys.exc_info()[1]
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if ex.args[0] == SSL_ERROR_EOF and self.suppress_ragged_eofs:
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return ''
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elif ex.args[0] == SSL_ERROR_WANT_READ:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._read_event, timeout_exc=_SSLErrorReadTimeout)
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elif ex.args[0] == SSL_ERROR_WANT_WRITE:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._write_event, timeout_exc=_SSLErrorWriteTimeout)
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else:
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raise
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def unwrap(self):
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if self._sslobj:
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s = self._sslobj_shutdown()
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self._sslobj = None
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return socket(_sock=s)
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else:
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raise ValueError("No SSL wrapper around " + str(self))
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def shutdown(self, how):
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self._sslobj = None
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socket.shutdown(self, how)
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def close(self):
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if self._makefile_refs < 1:
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self._sslobj = None
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socket.close(self)
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else:
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self._makefile_refs -= 1
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def do_handshake(self):
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"""Perform a TLS/SSL handshake."""
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while True:
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try:
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return self._sslobj.do_handshake()
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except SSLError:
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ex = sys.exc_info()[1]
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if ex.args[0] == SSL_ERROR_WANT_READ:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._read_event, timeout_exc=_SSLErrorHandshakeTimeout)
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elif ex.args[0] == SSL_ERROR_WANT_WRITE:
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if self.timeout == 0.0:
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raise
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sys.exc_clear()
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self._wait(self._write_event, timeout_exc=_SSLErrorHandshakeTimeout)
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else:
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raise
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def connect(self, addr):
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"""Connects to remote ADDR, and then wraps the connection in
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an SSL channel."""
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# Here we assume that the socket is client-side, and not
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# connected at the time of the call. We connect it, then wrap it.
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if self._sslobj:
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raise ValueError("attempt to connect already-connected SSLSocket!")
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socket.connect(self, addr)
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if self.ciphers is None:
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self._sslobj = _ssl.sslwrap(self._sock, False, self.keyfile, self.certfile,
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self.cert_reqs, self.ssl_version,
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self.ca_certs)
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else:
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self._sslobj = _ssl.sslwrap(self._sock, False, self.keyfile, self.certfile,
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self.cert_reqs, self.ssl_version,
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self.ca_certs, self.ciphers)
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if self.do_handshake_on_connect:
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self.do_handshake()
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def accept(self):
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"""Accepts a new connection from a remote client, and returns
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a tuple containing that new connection wrapped with a server-side
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SSL channel, and the address of the remote client."""
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newsock, addr = socket.accept(self)
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return (SSLSocket(newsock._sock,
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keyfile=self.keyfile,
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certfile=self.certfile,
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server_side=True,
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cert_reqs=self.cert_reqs,
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ssl_version=self.ssl_version,
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ca_certs=self.ca_certs,
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do_handshake_on_connect=self.do_handshake_on_connect,
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suppress_ragged_eofs=self.suppress_ragged_eofs,
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ciphers=self.ciphers),
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addr)
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def makefile(self, mode='r', bufsize=-1):
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"""Make and return a file-like object that
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works with the SSL connection. Just use the code
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from the socket module."""
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self._makefile_refs += 1
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# close=True so as to decrement the reference count when done with
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# the file-like object.
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return _fileobject(self, mode, bufsize, close=True)
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_SSLErrorReadTimeout = SSLError('The read operation timed out')
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_SSLErrorWriteTimeout = SSLError('The write operation timed out')
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_SSLErrorHandshakeTimeout = SSLError('The handshake operation timed out')
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def wrap_socket(sock, keyfile=None, certfile=None,
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server_side=False, cert_reqs=CERT_NONE,
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ssl_version=PROTOCOL_SSLv23, ca_certs=None,
|
||
|
|
do_handshake_on_connect=True,
|
||
|
|
suppress_ragged_eofs=True, ciphers=None):
|
||
|
|
"""Create a new :class:`SSLSocket` instance."""
|
||
|
|
return SSLSocket(sock, keyfile=keyfile, certfile=certfile,
|
||
|
|
server_side=server_side, cert_reqs=cert_reqs,
|
||
|
|
ssl_version=ssl_version, ca_certs=ca_certs,
|
||
|
|
do_handshake_on_connect=do_handshake_on_connect,
|
||
|
|
suppress_ragged_eofs=suppress_ragged_eofs,
|
||
|
|
ciphers=ciphers)
|
||
|
|
|
||
|
|
|
||
|
|
def get_server_certificate(addr, ssl_version=PROTOCOL_SSLv3, ca_certs=None):
|
||
|
|
"""Retrieve the certificate from the server at the specified address,
|
||
|
|
and return it as a PEM-encoded string.
|
||
|
|
If 'ca_certs' is specified, validate the server cert against it.
|
||
|
|
If 'ssl_version' is specified, use it in the connection attempt."""
|
||
|
|
|
||
|
|
host, port = addr
|
||
|
|
if (ca_certs is not None):
|
||
|
|
cert_reqs = CERT_REQUIRED
|
||
|
|
else:
|
||
|
|
cert_reqs = CERT_NONE
|
||
|
|
s = wrap_socket(socket(), ssl_version=ssl_version,
|
||
|
|
cert_reqs=cert_reqs, ca_certs=ca_certs)
|
||
|
|
s.connect(addr)
|
||
|
|
dercert = s.getpeercert(True)
|
||
|
|
s.close()
|
||
|
|
return DER_cert_to_PEM_cert(dercert)
|
||
|
|
|
||
|
|
|
||
|
|
def sslwrap_simple(sock, keyfile=None, certfile=None):
|
||
|
|
"""A replacement for the old socket.ssl function. Designed
|
||
|
|
for compability with Python 2.5 and earlier. Will disappear in
|
||
|
|
Python 3.0."""
|
||
|
|
return SSLSocket(sock, keyfile, certfile)
|