f49311ef9e
Certificate host names are now matched (using DNS, SRV, XMPPAddr, and Common Name), along with expiration check. Scheduled event to reset the stream once the server's cert expires. Handle invalid cert trust chains gracefully now.
302 lines
11 KiB
Python
302 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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"""
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sleekxmpp.clientxmpp
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~~~~~~~~~~~~~~~~~~~~
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This module provides XMPP functionality that
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is specific to client connections.
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Part of SleekXMPP: The Sleek XMPP Library
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:copyright: (c) 2011 Nathanael C. Fritz
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:license: MIT, see LICENSE for more details
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"""
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from __future__ import absolute_import, unicode_literals
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import logging
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from sleekxmpp.stanza import StreamFeatures
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from sleekxmpp.basexmpp import BaseXMPP
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from sleekxmpp.exceptions import XMPPError
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from sleekxmpp.xmlstream import XMLStream
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from sleekxmpp.xmlstream.matcher import StanzaPath, MatchXPath
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from sleekxmpp.xmlstream.handler import Callback
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# Flag indicating if DNS SRV records are available for use.
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try:
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import dns.resolver
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except ImportError:
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DNSPYTHON = False
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else:
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DNSPYTHON = True
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log = logging.getLogger(__name__)
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class ClientXMPP(BaseXMPP):
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"""
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SleekXMPP's client class. (Use only for good, not for evil.)
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Typical use pattern:
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.. code-block:: python
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xmpp = ClientXMPP('user@server.tld/resource', 'password')
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# ... Register plugins and event handlers ...
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xmpp.connect()
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xmpp.process(block=False) # block=True will block the current
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# thread. By default, block=False
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:param jid: The JID of the XMPP user account.
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:param password: The password for the XMPP user account.
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:param ssl: **Deprecated.**
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:param plugin_config: A dictionary of plugin configurations.
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:param plugin_whitelist: A list of approved plugins that
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will be loaded when calling
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:meth:`~sleekxmpp.basexmpp.BaseXMPP.register_plugins()`.
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:param escape_quotes: **Deprecated.**
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"""
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def __init__(self, jid, password, ssl=False, plugin_config={},
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plugin_whitelist=[], escape_quotes=True, sasl_mech=None):
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BaseXMPP.__init__(self, jid, 'jabber:client')
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self.set_jid(jid)
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self.escape_quotes = escape_quotes
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self.plugin_config = plugin_config
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self.plugin_whitelist = plugin_whitelist
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self.default_port = 5222
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self.credentials = {}
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self.password = password
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self.stream_header = "<stream:stream to='%s' %s %s version='1.0'>" % (
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self.boundjid.host,
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"xmlns:stream='%s'" % self.stream_ns,
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"xmlns='%s'" % self.default_ns)
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self.stream_footer = "</stream:stream>"
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self.features = set()
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self._stream_feature_handlers = {}
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self._stream_feature_order = []
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self.dns_service = 'xmpp-client'
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#TODO: Use stream state here
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self.authenticated = False
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self.sessionstarted = False
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self.bound = False
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self.bindfail = False
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self.add_event_handler('connected', self._handle_connected)
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self.add_event_handler('session_bind', self._handle_session_bind)
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self.register_stanza(StreamFeatures)
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self.register_handler(
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Callback('Stream Features',
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MatchXPath('{%s}features' % self.stream_ns),
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self._handle_stream_features))
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self.register_handler(
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Callback('Roster Update',
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StanzaPath('iq@type=set/roster'),
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self._handle_roster))
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# Setup default stream features
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self.register_plugin('feature_starttls')
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self.register_plugin('feature_bind')
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self.register_plugin('feature_session')
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self.register_plugin('feature_mechanisms',
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pconfig={'use_mech': sasl_mech} if sasl_mech else None)
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self.register_plugin('feature_rosterver')
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@property
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def password(self):
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return self.credentials.get('password', '')
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@password.setter
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def password(self, value):
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self.credentials['password'] = value
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def connect(self, address=tuple(), reattempt=True,
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use_tls=True, use_ssl=False):
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"""Connect to the XMPP server.
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When no address is given, a SRV lookup for the server will
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be attempted. If that fails, the server user in the JID
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will be used.
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:param address -- A tuple containing the server's host and port.
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:param reattempt: If ``True``, repeat attempting to connect if an
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error occurs. Defaults to ``True``.
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:param use_tls: Indicates if TLS should be used for the
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connection. Defaults to ``True``.
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:param use_ssl: Indicates if the older SSL connection method
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should be used. Defaults to ``False``.
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"""
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self.session_started_event.clear()
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# If an address was provided, disable using DNS SRV lookup;
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# otherwise, use the domain from the client JID with the standard
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# XMPP client port and allow SRV lookup.
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if address:
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self.dns_service = None
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else:
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address = (self.boundjid.host, 5222)
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self.dns_service = 'xmpp-client'
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self._expected_server_name = self.boundjid.host
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return XMLStream.connect(self, address[0], address[1],
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use_tls=use_tls, use_ssl=use_ssl,
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reattempt=reattempt)
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def register_feature(self, name, handler, restart=False, order=5000):
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"""Register a stream feature handler.
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:param name: The name of the stream feature.
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:param handler: The function to execute if the feature is received.
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:param restart: Indicates if feature processing should halt with
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this feature. Defaults to ``False``.
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:param order: The relative ordering in which the feature should
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be negotiated. Lower values will be attempted
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earlier when available.
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"""
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self._stream_feature_handlers[name] = (handler, restart)
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self._stream_feature_order.append((order, name))
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self._stream_feature_order.sort()
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def update_roster(self, jid, name=None, subscription=None, groups=[],
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block=True, timeout=None, callback=None):
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"""Add or change a roster item.
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:param jid: The JID of the entry to modify.
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:param name: The user's nickname for this JID.
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:param subscription: The subscription status. May be one of
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``'to'``, ``'from'``, ``'both'``, or
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``'none'``. If set to ``'remove'``,
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the entry will be deleted.
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:param groups: The roster groups that contain this item.
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:param block: Specify if the roster request will block
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until a response is received, or a timeout
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occurs. Defaults to ``True``.
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:param timeout: The length of time (in seconds) to wait
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for a response before continuing if blocking
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is used. Defaults to
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:attr:`~sleekxmpp.xmlstream.xmlstream.XMLStream.response_timeout`.
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:param callback: Optional reference to a stream handler function.
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Will be executed when the roster is received.
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Implies ``block=False``.
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"""
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return self.client_roster.update(jid, name, subscription, groups,
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block, timeout, callback)
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def del_roster_item(self, jid):
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"""Remove an item from the roster.
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This is done by setting its subscription status to ``'remove'``.
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:param jid: The JID of the item to remove.
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"""
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return self.client_roster.remove(jid)
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def get_roster(self, block=True, timeout=None, callback=None):
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"""Request the roster from the server.
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:param block: Specify if the roster request will block until a
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response is received, or a timeout occurs.
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Defaults to ``True``.
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:param timeout: The length of time (in seconds) to wait for a response
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before continuing if blocking is used.
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Defaults to
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:attr:`~sleekxmpp.xmlstream.xmlstream.XMLStream.response_timeout`.
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:param callback: Optional reference to a stream handler function. Will
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be executed when the roster is received.
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Implies ``block=False``.
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"""
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iq = self.Iq()
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iq['type'] = 'get'
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iq.enable('roster')
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if 'rosterver' in self.features:
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iq['roster']['ver'] = self.client_roster.version
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if not block and callback is None:
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callback = lambda resp: self._handle_roster(resp)
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response = iq.send(block, timeout, callback)
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self.event('roster_received', response)
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if block:
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self._handle_roster(response)
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return response
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def _handle_connected(self, event=None):
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#TODO: Use stream state here
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self.authenticated = False
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self.sessionstarted = False
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self.bound = False
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self.bindfail = False
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self.features = set()
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def _handle_stream_features(self, features):
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"""Process the received stream features.
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:param features: The features stanza.
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"""
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for order, name in self._stream_feature_order:
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if name in features['features']:
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handler, restart = self._stream_feature_handlers[name]
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if handler(features) and restart:
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# Don't continue if the feature requires
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# restarting the XML stream.
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return True
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def _handle_roster(self, iq):
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"""Update the roster after receiving a roster stanza.
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:param iq: The roster stanza.
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"""
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if iq['type'] == 'set':
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if iq['from'].bare and iq['from'].bare != self.boundjid.bare:
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raise XMPPError(condition='service-unavailable')
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roster = self.client_roster
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if iq['roster']['ver']:
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roster.version = iq['roster']['ver']
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for jid in iq['roster']['items']:
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item = iq['roster']['items'][jid]
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roster[jid]['name'] = item['name']
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roster[jid]['groups'] = item['groups']
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roster[jid]['from'] = item['subscription'] in ['from', 'both']
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roster[jid]['to'] = item['subscription'] in ['to', 'both']
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roster[jid]['pending_out'] = (item['ask'] == 'subscribe')
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roster[jid].save(remove=(item['subscription'] == 'remove'))
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self.event("roster_update", iq)
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if iq['type'] == 'set':
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resp = self.Iq(stype='result',
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sto=iq['from'],
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sid=iq['id'])
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resp.enable('roster')
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resp.send()
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def _handle_session_bind(self, jid):
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"""Set the client roster to the JID set by the server.
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:param :class:`sleekxmpp.xmlstream.jid.JID` jid: The bound JID as
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dictated by the server. The same as :attr:`boundjid`.
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"""
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self.client_roster = self.roster[jid]
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# To comply with PEP8, method names now use underscores.
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# Deprecated method names are re-mapped for backwards compatibility.
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ClientXMPP.updateRoster = ClientXMPP.update_roster
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ClientXMPP.delRosterItem = ClientXMPP.del_roster_item
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ClientXMPP.getRoster = ClientXMPP.get_roster
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ClientXMPP.registerFeature = ClientXMPP.register_feature
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