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annotate sat/tools/web.py @ 3725:9b45f0f168cf

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tools (common): new `async_utils` module with an async version of `lru_cache`
author Goffi <goffi@goffi.org>
date Tue, 25 Jan 2022 17:25:10 +0100
parents 7550ae9cfbac
children 65bac82e4049
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1 #!/usr/bin/env python3
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2
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3 # Libervia: an XMPP client
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4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 from OpenSSL import SSL
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20 from zope.interface import implementer
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21 from treq.client import HTTPClient
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22 from twisted.internet.interfaces import IOpenSSLClientConnectionCreator
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23 from twisted.internet import reactor, ssl
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24 from twisted.web import iweb
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25 from twisted.web import client as http_client
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26 from sat.core.log import getLogger
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27
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28
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29 log = getLogger(__name__)
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31
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32 SSLError = SSL.Error
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33
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34
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35 @implementer(IOpenSSLClientConnectionCreator)
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36 class NoCheckConnectionCreator(object):
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37 def __init__(self, hostname, ctx):
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38 self._ctx = ctx
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39
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40 def clientConnectionForTLS(self, tlsProtocol):
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41 context = self._ctx
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42 connection = SSL.Connection(context, None)
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43 connection.set_app_data(tlsProtocol)
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44 return connection
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47 @implementer(iweb.IPolicyForHTTPS)
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48 class NoCheckContextFactory:
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49 """Context factory which doesn't do TLS certificate check
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50
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51 /!\\ it's obvisously a security flaw to use this class,
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52 and it should be used only with explicit agreement from the end used
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53 """
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54
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55 def creatorForNetloc(self, hostname, port):
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56 log.warning(
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57 "TLS check disabled for {host} on port {port}".format(
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58 host=hostname, port=port
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59 )
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60 )
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61 certificateOptions = ssl.CertificateOptions(trustRoot=None)
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62 return NoCheckConnectionCreator(hostname, certificateOptions.getContext())
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65 #: following treq doesn't check TLS, obviously it is unsecure and should not be used
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66 #: without explicit warning
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67 treq_client_no_ssl = HTTPClient(http_client.Agent(reactor, NoCheckContextFactory()))