Preliminary work for in-band registration.

1 files changed, 101 insertions, 0 deletions

diff --git a/server/alias_plugin.py b/server/alias_plugin.py
new file mode 100644
index 0000000..2001b1b
--- /dev/null
+++ b/server/alias_plugin.py
@@ -0,0 +1,101 @@
+import logging
+logger = logging.getLogger(__name__)
+import base64
+import hashlib
+from xml.etree import cElementTree as ET
+
+from sleekxmpp.xmlstream.stanzabase import ElementBase, register_stanza_plugin
+from sleekxmpp.plugins import base
+from sleekxmpp.xmlstream.handler.callback import Callback
+from sleekxmpp.xmlstream.matcher.xpath import MatchXPath
+from sleekxmpp.stanza.iq import Iq
+
+from object import ObjectReader, ObjectError
+from permission import PermissionError
+
+class AliasQuery(ElementBase):
+    namespace = 'alias:query'
+    name = 'query'
+    plugin_attrib = 'alias'
+    interfaces = set(('node', 'type', 'content', 'permission', 'key'))
+    sub_interfaces = set(('content', 'permission', 'key', 'salt'))
+
+    def addItem(self, node, key, permission = None):
+        item = AliasItem(None, self)
+        item['node'] = node
+        item['key'] = key
+        if permission is not None:
+            item['permission'] = str(permission)
+
+class AliasItem(ElementBase):
+    namespace = 'alias:query'
+    name = 'item'
+    plugin_attrib = 'item'
+    interfaces = set(('node', 'permission', 'key'))
+
+class AliasPlugin(base.base_plugin):
+
+    def plugin_init(self):
+        self.description = 'Plugin to handle alias queries'
+        register_stanza_plugin(Iq, AliasQuery)
+        query_parser = MatchXPath('{{{}}}iq/{{{}}}query'.format(self.xmpp.default_ns,
+                                                                AliasQuery.namespace))
+        self.xmpp.register_handler(Callback('Alias queries', query_parser,
+                                            self.handle_alias_query))
+
+    def post_init(self):
+        base.base_plugin.post_init(self)
+        self.xmpp.plugin['xep_0030'].add_feature("alias:query")
+
+    def send_permission_error(self, iq, message):
+        node = iq['alias']['node']
+        iq.reply()
+        iq['alias']['type'] = 'error'
+        iq['alias']['node'] = node
+        iq['alias']['permission'] = message
+        iq.send()
+
+    def handle_alias_query(self, iq):
+        caller = iq['from'].bare
+        
+        if iq['alias']['type'] == 'keys':
+            key, salt = ObjectReader(caller).get_private_key();
+            iq.reply()
+            iq['alias']['type'] = 'keys'
+            iq['alias']['key'] = key
+            iq['alias']['salt'] = salt
+            iq.send()
+            
+        try:
+            callee = base64.b64decode(iq['to'].user)
+        except TypeError:
+            logger.error("callee field not base64 encoded")
+        
+        node = iq['alias']['node']
+        node = ObjectReader(callee, node)
+
+        if iq['alias']['type'] == 'items':
+            try:
+                childs = node.get_child_list(caller)
+            except PermissionError:
+                self.send_permission_error(iq, 'Permission')
+            else:
+                iq.reply()
+                iq['alias']['type'] = 'items'
+                iq['alias']['node'] = node.hash
+                for name, perm, key in childs:
+                    iq['alias'].addItem(name, key, perm)
+                iq.send()
+
+        if iq['alias']['type'] == 'content':
+            try:
+                content, key = node.get_content(caller)
+            except PermissionError:
+                self.send_permission_error(iq, 'Permission')
+            else:
+                iq.reply()
+                iq['alias']['type'] = 'content'
+                iq['alias']['node'] = node.hash
+                iq['alias']['content'] = content
+                iq['alias']['key'] = key
+                iq.send()
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