services/autocloak: new module

This allows network administrators to have clients connecting from
specific IP addresses have their vhost mangled so as to uniquely
identify them in cases where a vhost is not set by services.

Author: Xe

etc/config.json.example

@@ -59,6 +59,17 @@
 		"apikey": "asdfasdf"
 	},
 
+	"autocloak": {
+		"nick": "Gatekeeper",
+		"user": "cloakbot",
+		"host": "services.example.com",
+		"gecos": "Automatic cloaker",
+
+		"list": {
+			"127.45.123.69": "bnc.example.com"
+		}
+	},
+
 	"apikeys": {
 		"worldweatheronline": "asdfasdfasdfasdf"
 	}

modules/services/autocloak.py

@@ -0,0 +1,75 @@
+"""
+Copyright (c) 2014, Sam Dodrill
+All rights reserved.
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+"""
+
+NAME="Autocloak"
+DESC="Manages automatic cloaks for bouncers"
+
+from structures import *
+from utils import *
+
+import md5
+
+global client
+
+def initModule(cod):
+    global client
+
+    client = makeService(cod.config["autocloak"]["nick"], cod.config["autocloak"]["user"],
+            cod.config["autocloak"]["host"], cod.config["autocloak"]["gecos"],
+            cod.getUID())
+
+    cod.clients[client.uid] = client
+
+    cod.sendLine(client.burst())
+    cod.log("Bursting autocloak client", "!!!")
+
+    cod.s2scommands["EUID"].append(handleCloak)
+
+    cod.sendLine(client.join(cod.channels[cod.config["etc"]["snoopchan"]]))
+
+def destroyModule(cod):
+    global client
+
+    cod.sendLine(client.quit())
+    cod.clients.pop(client.uid)
+
+def rehash():
+    pass
+
+def handleCloak(cod, line):
+    #Check user's IP in the autocloak list
+    if line.args[6] in cod.config["autocloak"]["list"]:
+        cloaksuffix = cod.config["autocloak"]["list"][line.args[6]]
+        ident = line.args[4]
+
+        m = md5.new()
+        m.update(ident)
+
+        unique = m.hexdigest()[:16]
+
+        host = "%s.%s" % (unique.upper(), cloaksuffix)
+
+        cod.sendLine(":%s CHGHOST %s %s" % (client.uid, line.args[7], host))
+        cod.notice(line.args[7], "Your vhost has been uniquely randomized as a part of a policy set by your BNC host and network staff.", client)
+