Reorganize features into plugins.

7 files changed, 360 insertions, 0 deletions

diff --git a/sleekxmpp/features/__init__.py b/sleekxmpp/features/__init__.py
new file mode 100644
index 00000000..940a37f1
--- /dev/null
+++ b/sleekxmpp/features/__init__.py
@@ -0,0 +1,10 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+__all__ = ['feature_starttls', 'feature_mechanisms',
+           'sasl_plain', 'sasl_anonymous']
diff --git a/sleekxmpp/features/feature_bind.py b/sleekxmpp/features/feature_bind.py
new file mode 100644
index 00000000..caa3844b
--- /dev/null
+++ b/sleekxmpp/features/feature_bind.py
@@ -0,0 +1,55 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+
+from sleekxmpp.xmlstream.matcher import *
+from sleekxmpp.xmlstream.handler import *
+from sleekxmpp.plugins.base import base_plugin
+
+
+log = logging.getLogger(__name__)
+
+
+class feature_bind(base_plugin):
+
+    def plugin_init(self):
+        self.name = 'Bind Resource'
+        self.rfc = '6120'
+        self.description = 'Resource Binding Stream Feature'
+
+        self.xmpp.register_feature('bind',
+                self._handle_bind_resource,
+                restart=False,
+                order=10000)
+
+    def _handle_bind_resource(self, features):
+        """
+        Handle requesting a specific resource.
+
+        Arguments:
+            features -- The stream features stanza.
+        """
+        log.debug("Requesting resource: %s" % self.xmpp.boundjid.resource)
+        iq = self.xmpp.Iq()
+        iq['type'] = 'set'
+        iq.enable('bind')
+        if self.xmpp.boundjid.resource:
+            iq['bind']['resource'] = self.xmpp.boundjid.resource
+        response = iq.send(now=True)
+
+        self.xmpp.set_jid(response['bind']['jid'])
+        self.xmpp.bound = True
+
+        log.info("Node set to: %s" % self.xmpp.boundjid.full)
+
+        if 'session' not in features['features']:
+            log.debug("Established Session")
+            self.xmpp.sessionstarted = True
+            self.xmpp.session_started_event.set()
+            self.xmpp.event("session_start")
diff --git a/sleekxmpp/features/feature_mechanisms.py b/sleekxmpp/features/feature_mechanisms.py
new file mode 100644
index 00000000..994c9bed
--- /dev/null
+++ b/sleekxmpp/features/feature_mechanisms.py
@@ -0,0 +1,116 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+
+from sleekxmpp.stanza import stream
+from sleekxmpp.xmlstream import RestartStream
+from sleekxmpp.xmlstream.matcher import *
+from sleekxmpp.xmlstream.handler import *
+from sleekxmpp.plugins.base import base_plugin
+
+
+log = logging.getLogger(__name__)
+
+
+class feature_mechanisms(base_plugin):
+
+    def plugin_init(self):
+        self.name = 'SASL Mechanisms'
+        self.rfc = '6120'
+        self.description = "SASL Stream Feature"
+
+        self.xmpp.register_stanza(stream.sasl.Success)
+        self.xmpp.register_stanza(stream.sasl.Failure)
+        self.xmpp.register_stanza(stream.sasl.Auth)
+
+        self._mechanism_handlers = {}
+        self._mechanism_priorities = []
+
+        self.xmpp.register_handler(
+                Callback('SASL Success',
+                         MatchXPath(stream.sasl.Success.tag_name()),
+                         self._handle_success,
+                         instream=True,
+                         once=True))
+        self.xmpp.register_handler(
+                Callback('SASL Failure',
+                         MatchXPath(stream.sasl.Failure.tag_name()),
+                         self._handle_fail,
+                         instream=True,
+                         once=True))
+
+        self.xmpp.register_feature('mechanisms',
+                self._handle_sasl_auth,
+                restart=True,
+                order=self.config.get('order', 100))
+
+    def register_mechanism(self, name, handler, priority=0):
+        """
+        Register a handler for a SASL authentication mechanism.
+
+        Arguments:
+            name     -- The name of the mechanism (all caps)
+            handler  -- The function that will perform the
+                        authentication. The function must
+                        return True if it is able to carry
+                        out the authentication, False if
+                        a required condition is not met.
+            priority -- An integer value indicating the
+                        preferred ordering for the mechanism.
+                        High values will be attempted first.
+        """
+        self._mechanism_handlers[name] = handler
+        self._mechanism_priorities.append((priority, name))
+        self._mechanism_priorities.sort(reverse=True)
+
+    def remove_mechanism(self, name):
+        """
+        Remove support for a given SASL authentication mechanism.
+
+        Arguments:
+            name -- The name of the mechanism to remove (all caps)
+        """
+        if name in self._mechanism_handlers:
+            del self._mechanism_handlers[name]
+
+        p = self._mechanism_priorities
+        self._mechanism_priorities = [i for i in p if i[1] != name]
+
+    def _handle_sasl_auth(self, features):
+        """
+        Handle authenticating using SASL.
+
+        Arguments:
+            features -- The stream features stanza.
+        """
+        for priority, mech in self._mechanism_priorities:
+            if mech in features['mechanisms']:
+                log.debug('Attempt to use SASL %s' % mech)
+                if self._mechanism_handlers[mech]():
+                    break
+        else:
+            log.error("No appropriate login method.")
+            self.xmpp.event("no_auth", direct=True)
+            self.xmpp.disconnect()
+
+        return True
+
+    def _handle_success(self, stanza):
+        """SASL authentication succeeded. Restart the stream."""
+        self.xmpp.authenticated = True
+        self.xmpp.features.append('mechanisms')
+        raise RestartStream()
+
+    def _handle_fail(self, stanza):
+        """SASL authentication failed. Disconnect and shutdown."""
+        log.info("Authentication failed.")
+        self.xmpp.event("failed_auth", direct=True)
+        self.xmpp.disconnect()
+        log.debug("Starting SASL Auth")
+        return True
diff --git a/sleekxmpp/features/feature_session.py b/sleekxmpp/features/feature_session.py
new file mode 100644
index 00000000..5bae358c
--- /dev/null
+++ b/sleekxmpp/features/feature_session.py
@@ -0,0 +1,46 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+
+from sleekxmpp.xmlstream.matcher import *
+from sleekxmpp.xmlstream.handler import *
+from sleekxmpp.plugins.base import base_plugin
+
+
+log = logging.getLogger(__name__)
+
+
+class feature_session(base_plugin):
+
+    def plugin_init(self):
+        self.name = 'Start Session'
+        self.rfc = '3920'
+        self.description = 'Start Session Stream Feature'
+
+        self.xmpp.register_feature('session',
+                self._handle_start_session,
+                restart=False,
+                order=10001)
+
+    def _handle_start_session(self, features):
+        """
+        Handle the start of the session.
+
+        Arguments:
+            feature -- The stream features element.
+        """
+        iq = self.xmpp.Iq()
+        iq['type'] = 'set'
+        iq.enable('session')
+        response = iq.send(now=True)
+
+        log.debug("Established Session")
+        self.xmpp.sessionstarted = True
+        self.xmpp.session_started_event.set()
+        self.xmpp.event("session_start")
diff --git a/sleekxmpp/features/feature_starttls.py b/sleekxmpp/features/feature_starttls.py
new file mode 100644
index 00000000..5367fa49
--- /dev/null
+++ b/sleekxmpp/features/feature_starttls.py
@@ -0,0 +1,61 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010  Nathanael C. Fritz
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+
+from sleekxmpp.stanza.stream import tls
+from sleekxmpp.xmlstream import RestartStream
+from sleekxmpp.xmlstream.matcher import *
+from sleekxmpp.xmlstream.handler import *
+from sleekxmpp.plugins.base import base_plugin
+
+
+log = logging.getLogger(__name__)
+
+
+class feature_starttls(base_plugin):
+
+    def plugin_init(self):
+        self.name = "STARTTLS"
+        self.rfc = '6120'
+        self.description = "STARTTLS Stream Feature"
+
+        self.xmpp.register_stanza(tls.Proceed)
+        self.xmpp.register_handler(
+                Callback('STARTTLS Proceed',
+                        MatchXPath(tls.Proceed.tag_name()),
+                        self._handle_starttls_proceed,
+                        instream=True))
+        self.xmpp.register_feature('starttls',
+                self._handle_starttls,
+                restart=True,
+                order=self.config.get('order', 0))
+
+    def _handle_starttls(self, features):
+        """
+        Handle notification that the server supports TLS.
+
+        Arguments:
+            features -- The stream:features element.
+        """
+        if not self.xmpp.use_tls:
+            return False
+        elif self.xmpp.ssl_support:
+            self.xmpp.send(features['starttls'], now=True)
+            return True
+        else:
+            log.warning("The module tlslite is required to log in" +\
+                            " to some servers, and has not been found.")
+            return False
+
+    def _handle_starttls_proceed(self, proceed):
+        """Restart the XML stream when TLS is accepted."""
+        log.debug("Starting TLS")
+        if self.xmpp.start_tls():
+            self.xmpp.features.append('starttls')
+            raise RestartStream()
diff --git a/sleekxmpp/features/sasl_anonymous.py b/sleekxmpp/features/sasl_anonymous.py
new file mode 100644
index 00000000..469d9d19
--- /dev/null
+++ b/sleekxmpp/features/sasl_anonymous.py
@@ -0,0 +1,31 @@
+import base64
+import sys
+import logging
+
+from sleekxmpp.stanza.stream import sasl
+from sleekxmpp.plugins.base import base_plugin
+
+
+log = logging.getLogger(__name__)
+
+
+class sasl_anonymous(base_plugin):
+
+    def plugin_init(self):
+        self.name = 'SASL ANONYMOUS'
+        self.rfc = '6120'
+        self.description = 'SASL ANONYMOUS Mechanism'
+
+        self.xmpp.register_sasl_mechanism('ANONYMOUS',
+                self._handle_anonymous,
+                priority=self.config.get('priority', 0))
+
+    def _handle_anonymous(self):
+        if self.xmpp.boundjid.user:
+            return False
+
+        resp = sasl.Auth(self.xmpp)
+        resp['mechanism'] = 'ANONYMOUS'
+        resp.send(now=True)
+
+        return True
diff --git a/sleekxmpp/features/sasl_plain.py b/sleekxmpp/features/sasl_plain.py
new file mode 100644
index 00000000..36c7d9df
--- /dev/null
+++ b/sleekxmpp/features/sasl_plain.py
@@ -0,0 +1,41 @@
+import base64
+import sys
+import logging
+
+from sleekxmpp.stanza.stream import sasl
+from sleekxmpp.plugins.base import base_plugin
+
+
+log = logging.getLogger(__name__)
+
+
+class sasl_plain(base_plugin):
+
+    def plugin_init(self):
+        self.name = 'SASL PLAIN'
+        self.rfc = '6120'
+        self.description = 'SASL PLAIN Mechanism'
+
+        self.xmpp.register_sasl_mechanism('PLAIN',
+                self._handle_plain,
+                priority=self.config.get('priority', 1))
+
+    def _handle_plain(self):
+        if not self.xmpp.boundjid.user:
+            return False
+
+        if sys.version_info < (3, 0):
+            user = bytes(self.xmpp.boundjid.user)
+            password = bytes(self.xmpp.password)
+        else:
+            user = bytes(self.xmpp.boundjid.user, 'utf-8')
+            password = bytes(self.xmpp.password, 'utf-8')
+
+        auth = base64.b64encode(b'\x00' + user + \
+                                b'\x00' + password).decode('utf-8')
+
+        resp = sasl.Auth(self.xmpp)
+        resp['mechanism'] = 'PLAIN'
+        resp['value'] = auth
+        resp.send(now=True)
+        return True