From c0171eba814bbd229c507710184c0a5feee66f94 Mon Sep 17 00:00:00 2001
From: Bastien Schils <bastien@ansaba.org>
Date: Mon, 23 Sep 2019 18:22:25 +0200
Subject: [PATCH] Added: IP matching module

---
 bin/IPAddress.py               | 105 +++++++++++++++++++++++++++++++++
 bin/packages/config.cfg.sample |   2 +
 bin/packages/modules.cfg       |   3 +
 3 files changed, 110 insertions(+)
 create mode 100755 bin/IPAddress.py

diff --git a/bin/IPAddress.py b/bin/IPAddress.py
new file mode 100755
index 00000000..daca1f94
--- /dev/null
+++ b/bin/IPAddress.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python3
+# -*-coding:UTF-8 -*
+"""
+The IP Module
+======================
+
+This module is consuming the global channel.
+
+It first performs a regex to find IP addresses and then matches those IPs to 
+some configured ip ranges.
+
+The list of IP ranges are expected to be in CIDR format (e.g. 192.168.0.0/16)
+and should be defined in the config.cfg file, under the [IP] section
+
+"""
+
+import time
+import re
+from pubsublogger import publisher
+from packages import Paste
+from Helper import Process
+
+
+#
+# Thanks to Syed Sadat Nazrul
+# URL: https://medium.com/@sadatnazrul/checking-if-ipv4-address-in-network-python-af61a54d714d
+
+def ip_to_binary(ip):
+    octet_list_int = ip.split(".")
+    octet_list_bin = [format(int(i), '08b') for i in octet_list_int]
+    binary = ("").join(octet_list_bin)
+    return binary
+
+def get_addr_network(address, net_size):
+    #Convert ip address to 32 bit binary
+    ip_bin = ip_to_binary(address)
+    #Extract Network ID from 32 binary
+    network = ip_bin[0:32-(32-net_size)]    
+    return network
+
+def ip_in_prefix(ip_address, prefix):
+    #CIDR based separation of address and network size
+    [prefix_address, net_size] = prefix.split("/")
+    #Convert string to int
+    net_size = int(net_size)
+    #Get the network ID of both prefix and ip based net size
+    prefix_network = get_addr_network(prefix_address, net_size)
+    ip_network = get_addr_network(ip_address, net_size)
+    return ip_network == prefix_network
+
+def search_ip(message):
+    paste = Paste.Paste(message)
+    content = paste.get_p_content()
+    # regex to find IPs
+    reg_ip = re.compile(r'^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)', flags=re.MULTILINE)
+    # list of the regex results in the Paste, may be null
+    results = reg_ip.findall(content)
+    matching_ips = []
+
+    print(results)
+
+    for res in results:
+        for network in ip_networks:
+            if ip_in_prefix(res,network):
+                matching_ips.append(res)
+
+    if len(matching_ips) > 0:
+        print('{} contains {} IPs'.format(paste.p_name, len(matching_ips)))
+        publisher.warning('{} contains {} IPs'.format(paste.p_name, len(matching_ips)))
+
+        #Tag message with IP
+        msg = 'infoleak:automatic-detection="ip";{}'.format(message)
+        p.populate_set_out(msg, 'Tags')
+        #Send to duplicate
+        p.populate_set_out(message, 'Duplicate')
+
+if __name__ == '__main__':
+    # If you wish to use an other port of channel, do not forget to run a subscriber accordingly (see launch_logs.sh)
+    # Port of the redis instance used by pubsublogger
+    publisher.port = 6380
+    # Script is the default channel used for the modules.
+    publisher.channel = 'Script'
+
+    # Section name in bin/packages/modules.cfg
+    config_section = 'IP'
+    # Setup the I/O queues
+    p = Process(config_section)
+
+    ip_networks = p.config.get("IP", "networks").split(",")
+
+
+    # Sent to the logging a description of the module
+    publisher.info("Run IP module")
+
+    # Endless loop getting messages from the input queue
+    while True:
+        # Get one message from the input queue
+        message = p.get_from_set()
+        if message is None:
+            publisher.debug("{} queue is empty, waiting".format(config_section))
+            time.sleep(1)
+            continue
+
+        # Do something with the message from the queue
+        search_ip(message)
diff --git a/bin/packages/config.cfg.sample b/bin/packages/config.cfg.sample
index c59e5c6b..ea19eb85 100644
--- a/bin/packages/config.cfg.sample
+++ b/bin/packages/config.cfg.sample
@@ -266,3 +266,5 @@ default_crawler_closespider_pagecount = 50
 default_crawler_user_agent = Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0
 splash_url = http://127.0.0.1
 splash_port = 8050-8052
+[IP]
+networks = 192.168.34.0/24,10.0.0.0/8,192.168.33.0/24
diff --git a/bin/packages/modules.cfg b/bin/packages/modules.cfg
index 7c8e3138..ec38cebc 100644
--- a/bin/packages/modules.cfg
+++ b/bin/packages/modules.cfg
@@ -128,3 +128,6 @@ publish = Redis_Mixer
 [Crawler]
 subscribe = Redis_Crawler
 publish = Redis_Mixer,Redis_Tags
+[IP]
+subscribe = Redis_Global
+publish = Redis_Duplicate,Redis_Tags