Jeff Becker
7 years ago
18 changed files with 0 additions and 669 deletions
@ -1,10 +0,0 @@
@@ -1,10 +0,0 @@
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*~ |
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*.pyc |
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*\#* |
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v/ |
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*.egg-info/ |
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build/ |
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dist/ |
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@ -1,17 +0,0 @@
@@ -1,17 +0,0 @@
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# baddie detector |
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i2p netdb blacklist generator tool |
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## usage |
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building: |
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python3 -m venv v |
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v/bin/pip install -r requirements.txt |
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v/bin/python setup.py install |
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running: |
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v/bin/python -m baddiefinder |
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@ -1,29 +0,0 @@
@@ -1,29 +0,0 @@
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# |
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# |
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# |
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import netdb |
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from argparse import ArgumentParser as AP |
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from . import settings |
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from . import filter |
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from . import processor |
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def main(): |
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ap = AP() |
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ap.add_argument("--settings", default="baddies.ini") |
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args = ap.parse_args() |
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s = settings.load(args.settings) |
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fmax = s.get("thresholds", "max_floodfills_per_ip", fallback=3) |
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f = filter.FloodfillFilter(fmax) |
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p = processor.BaddieProcessor([f]) |
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netdb.inspect(p.hook) |
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with open(s.get("output", "file", fallback="baddies.txt"), 'w') as f: |
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print ('wrote {} blocklist entries'.format(p.write_blocklist(f))) |
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if __name__ == "__main__": |
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main() |
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@ -1,33 +0,0 @@
@@ -1,33 +0,0 @@
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from . import util |
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class Filter: |
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name = "unnamed filter" |
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def process(self, info): |
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""" |
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process an info and return a string representation of a reason to add to blocklist |
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any other return value will cause this info to NOT be added to blocklist |
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""" |
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class FloodfillFilter(Filter): |
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name = "floodfill sybil detector" |
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def __init__(self, fmax): |
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self._floodfills = dict() |
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self.fmax = int(fmax) |
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def process(self, info): |
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caps = util.getcaps(info) |
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if not caps: |
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return |
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if b'f' not in caps: |
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return |
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h = util.getaddress(info) |
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if h not in self._floodfills: |
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self._floodfills[h] = 0 |
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self._floodfills[h] += 1 |
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if self._floodfills[h] > self.fmax: |
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return '{} > {} floodfills per ip'.format(self._floodfills[h], self.fmax) |
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@ -1,29 +0,0 @@
@@ -1,29 +0,0 @@
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from . import util |
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import datetime |
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class BaddieProcessor: |
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def __init__(self, filters): |
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self._filters = filters |
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self._baddies = dict() |
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def hook(self, entry): |
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now = datetime.datetime.now() |
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for f in self._filters: |
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reason = f.process(entry) |
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if reason is not None: |
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self.add_baddie(entry, 'detected by {} on {} ({})'.format(f.name, now.strftime("%c").replace(":",'-'), reason)) |
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def add_baddie(self, entry, reason): |
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addr = util.getaddress(entry).decode('ascii') |
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self._baddies[addr] = reason |
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def write_blocklist(self, f): |
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wrote = 0 |
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f.write('# baddies blocklist generated on {}\n'.format(datetime.datetime.now())) |
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for k in self._baddies: |
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f.write('{}:{}\n'.format(self._baddies[k], k)) |
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wrote += 1 |
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return wrote |
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@ -1,11 +0,0 @@
@@ -1,11 +0,0 @@
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# |
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# baddiefinder settings wrapper |
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# |
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from configparser import ConfigParser |
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def load(fname): |
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c = ConfigParser() |
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with open(fname) as f: |
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c.read_file(f, fname) |
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return c |
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@ -1,17 +0,0 @@
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def getaddress(info): |
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""" |
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get ip address from router info dict |
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""" |
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for addr in info.addrs: |
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opts = addr.options |
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if b'host' in opts: |
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h = opts[b'host'] |
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if b':' not in h: |
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return h |
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def getcaps(info): |
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""" |
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extract router caps |
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""" |
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if b'caps' in info.options: |
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return info.options[b'caps'] |
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@ -1,37 +0,0 @@
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import flask |
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import io |
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import netdb |
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from . import settings |
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from . import filter |
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from . import processor |
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app = flask.Flask(__name__) |
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@app.route("/baddies.txt") |
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def baddies(): |
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s = settings.load('baddies.ini') |
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fmax = s.get("thresholds", "max_floodfills_per_ip", fallback=3) |
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f = filter.FloodfillFilter(fmax) |
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p = processor.BaddieProcessor([f]) |
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path = s.get("netdb", "dir", fallback=None) |
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if path: |
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netdb.inspect(p.hook, path) |
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else: |
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netdb.inspect(p.hook) |
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body = io.StringIO() |
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p.write_blocklist(body) |
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v = body.getvalue() |
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body.close() |
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r = flask.Response(v) |
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r.headers["Content-Type"] = 'text/plain' |
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return r |
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@app.route("/") |
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def index(): |
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return """this server serves a router info blocklist of ip addresses with unreasonably high desnity of i2p routers (right now just floodfills) |
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""" |
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if __name__ == '__main__': |
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app.run() |
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@ -1,5 +0,0 @@
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[thresholds] |
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max_floodfills_per_ip = 3 |
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#[netdb] |
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#dir=/var/lib/i2p/netdb |
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@@ -1 +0,0 @@
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from .netdb import inspect |
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@ -1,12 +0,0 @@
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# |
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# main driver |
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# |
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from .netdb import inspect |
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def print_entry(ent): |
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print (ent) |
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if __name__ == '__main__': |
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inspect(hook=print_entry) |
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@ -1,376 +0,0 @@
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## |
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## i2p netdb parser |
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## |
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## Author: Jeff |
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## MIT Liecense 2014 |
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## |
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import os,sys,struct,time,hashlib,fnmatch,io |
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import base64 |
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import logging |
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try: |
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import pygeoip |
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geo = pygeoip.GeoIP('/usr/share/GeoIP/GeoIPCity.dat') |
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except: |
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geo = None |
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b64encode = lambda x : base64.b64encode(x, b'~-').decode('ascii') |
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def sha256(data,raw=True): |
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""" |
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compute sha256 of data |
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""" |
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h = hashlib.new('sha256') |
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h.update(data) |
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if raw: |
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return h.digest() |
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else: |
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return h.hexdigest() |
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class Inspector: |
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_log = logging.getLogger('NDBInspector') |
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def inspect(self, entry): |
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pass |
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def run(self, ndb): |
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entry_counter = 0 |
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for root, dirnames, filenames in os.walk(ndb): |
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for filename in fnmatch.filter(filenames, '*.dat'): |
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fname = os.path.join(root, filename) |
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e = Entry(fname) |
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e.verify() |
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if e.valid: |
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entry_counter += 1 |
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self.inspect(e) |
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else: |
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self._log.warn('invalid entry in file {}'.format(fname)) |
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self._log.info('read {} entries'.format(entry_counter)) |
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class Address: |
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""" |
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netdb address |
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""" |
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cost = None |
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transport = None |
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options = None |
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expire = None |
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location = None |
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def valid(self): |
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return None not in (self.cost, self.transport, self.options, self.expire) |
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def __repr__(self): |
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return 'Address: transport={} cost={} expire={} options={} location={} firewalled={}' \ |
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.format(self.transport, self.cost, self.expire, self.options, self.location, self.firewalled) |
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class Entry: |
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""" |
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netdb entry |
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""" |
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_pubkey_size = 256 |
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_signkey_size = 128 |
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_min_cert_size = 3 |
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_log = logging.getLogger('NDBEntry') |
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@staticmethod |
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def _read_short(fd): |
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Entry._log.debug('read_short') |
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d = Entry._read(fd, 2) |
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if d: |
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return struct.unpack('!H',d)[0] |
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@staticmethod |
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def _read_mapping(fd): |
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Entry._log.debug('read_mapping') |
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mapping = dict() |
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tsize = Entry._read_short(fd) |
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if tsize is None: |
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return |
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data = Entry._read(fd, tsize) |
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if data is None: |
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return |
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sfd = io.BytesIO(data) |
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ind = 0 |
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while ind < tsize: |
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Entry._log.debug(ind) |
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key = Entry._read_string(sfd) |
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if key is None: |
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return |
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Entry._log.debug(['key', key]) |
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ind += len(key) + 2 |
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Entry._read_byte(sfd) |
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val = Entry._read_string(sfd) |
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if val is None: |
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return |
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Entry._log.debug(['val',val]) |
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ind += len(val) + 2 |
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Entry._read_byte(sfd) |
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#key = key[:-1] |
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#val = val[:-1] |
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if key in mapping: |
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v = mapping[key] |
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if isinstance(v,list): |
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mapping[key].append(val) |
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else: |
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mapping[key] = [v,val] |
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else: |
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mapping[key] = val |
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return mapping |
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@staticmethod |
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def _read(fd, amount): |
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dat = fd.read(amount) |
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Entry._log.debug('read %d of %d bytes' % (len(dat), amount)) |
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if len(dat) == amount: |
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return dat |
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@staticmethod |
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def _read_byte(fd): |
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b = Entry._read(fd,1) |
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if b: |
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return struct.unpack('!B', b)[0] |
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@staticmethod |
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def _read_two_bytes(fd): |
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b = Entry._read(fd,2) |
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if b: |
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return struct.unpack('!H', b)[0] |
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@staticmethod |
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def _read_string(fd): |
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Entry._log.debug('read_string') |
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slen = Entry._read_byte(fd) |
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if slen: |
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return Entry._read(fd, slen) |
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@staticmethod |
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def _read_time(fd): |
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d = Entry._read(fd, 8) |
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if d: |
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li = struct.unpack('!Q', d)[0] |
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return li |
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@staticmethod |
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def geolookup(entry): |
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if geo: |
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return geo.record_by_addr(entry) |
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@staticmethod |
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def _read_addr(fd): |
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""" |
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load next router address |
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""" |
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Entry._log.debug('read_addr') |
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addr = Address() |
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addr.cost = Entry._read_byte(fd) |
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addr.expire = Entry._read_time(fd) |
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addr.transport = Entry._read_string(fd) |
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addr.options = Entry._read_mapping(fd) |
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addr.firewalled = False |
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if addr.valid(): |
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# This is a try because sometimes hostnames show up. |
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# TODO: Make it allow host names. |
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try: |
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addr.location = geolookup(addr.options.get('host', None)) |
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except: |
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addr.location = None |
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# If the router is firewalled (i.e. has no 'host' mapping), then use the first introducer (of 3). |
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# In the future it might be worth it to do something else, but this helps for geopip information for now. |
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# http://i2p-projekt.i2p/en/docs/transport/ssu#ra |
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if not addr.location: |
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# If there are introducers then it's probably firewalled. |
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addr.firewalled = True |
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try: |
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addr.location = geolookup(addr.options.get('ihost0', None)) |
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except: |
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addr.location = None |
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return addr |
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def __init__(self, filename): |
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""" |
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construct a NetDB Entry from a file |
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""" |
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self.addrs = list() |
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self.options = dict() |
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self.pubkey = None |
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self.signkey = None |
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self.cert = None |
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self.published = None |
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self.signature = None |
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self.peer_size = None |
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self.valid = False |
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try: |
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with open(filename, 'rb') as fr: |
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self._log.debug('load from file {}'.format(filename)) |
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self._load(fr) |
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#self.routerHash = |
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except (IOError, OSError) as e: |
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self._log.debug('load from file {} failed'.format(filename)) |
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def _load(self, fd): |
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""" |
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load from file descriptor |
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More docs: http://i2p-projekt.i2p/en/docs/spec/common-structures#struct_RouterInfo |
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""" |
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# router identity http://i2p-projekt.i2p/en/docs/spec/common-structures#struct_RouterIdentity |
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# Do not assume that these are always 387 bytes! |
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# There are 387 bytes plus the certificate length specified at bytes 385-386, which may be non-zero. |
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# Subtract because read the Certificate on it's own. |
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data = self._read(fd, 387-self._min_cert_size) |
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if data is None: |
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return |
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ind = 0 |
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# public key |
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self.pubkey = sha256(data[ind:ind+self._pubkey_size]) |
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ind += self._pubkey_size |
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# signing key (we hash this later due to RI changes in 0.9.12) |
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self.signkey = data[ind:ind+self._signkey_size] |
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ind + self._signkey_size |
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# certificate |
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self.cert = dict() |
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# If it's not null, follow what happens here: http://i2p-projekt.i2p/en/docs/spec/common-structures#type_Certificate |
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cert_type = self._read_byte(fd) |
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cert_len = self._read_two_bytes(fd) |
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if cert_type == 5 and cert_len != 0: # New format where extra information is in the cert. |
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spkt = self._read_two_bytes(fd) |
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cpkt = self._read_two_bytes(fd) |
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if spkt == 0: |
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self.cert['signature_type'],cert_padding,cert_extra = 'DSA_SHA1',0,0 |
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elif spkt == 1: |
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self.cert['signature_type'],cert_padding,cert_extra = 'ECDSA_SHA256_P256',64,0 |
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elif spkt == 2: |
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self.cert['signature_type'],cert_padding,cert_extra = 'ECDSA_SHA384_P384',32,0 |
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elif spkt == 3: |
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self.cert['signature_type'],cert_padding,cert_extra = 'ECDSA_SHA512_P521',0,4 |
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elif spkt == 4: |
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self.cert['signature_type'],cert_padding,cert_extra = 'RSA_SHA256_2048',0,128 |
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elif spkt == 5: |
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self.cert['signature_type'],cert_padding,cert_extra = 'RSA_SHA384_3072',0,256 |
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elif spkt == 6: |
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self.cert['signature_type'],cert_padding,cert_extra = 'RSA_SHA512_4096',0,384 |
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elif spkt == 7: |
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self.cert['signature_type'],cert_padding,cert_extra = 'EdDSA_SHA512_Ed25519',96,0 |
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else: |
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Entry._log.debug('Bad cert sign type.') |
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return |
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# This is always going to be 0 (as of 0.9.19), but future versions can add more crypto types. |
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if cpkt == 0: |
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self.cert['crypto_type'] = 'ElGamal' |
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else: |
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Entry._log.debug('Bad cert crypto type.') |
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return |
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else: # Old format where information is all in the main part. |
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self.cert['signature_type'],cert_padding,cert_extra = 'DSA_SHA1',0,0 |
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self.cert['crypto_type'] = 'ElGamal' |
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# Parse public key properly (http://i2p-projekt.i2p/en/docs/spec/common-structures#type_Certificate) |
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if cert_padding > 0: |
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self.signkey = self.signkey[cert_padding:] |
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if cert_extra > 0: |
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self.signkey += self._read(fd,cert_extra) |
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Entry._log.debug('parsed cert, sig type {}, crypto type {}.'.format(self.cert['signature_type'], self.cert['crypto_type'])) |
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self.signkey = sha256(self.signkey) |
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# date published |
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self.published = self._read_time(fd) |
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if self.published is None: |
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return |
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# reachable addresses |
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self.addrs = list() |
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addrlen = self._read_byte(fd) |
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if addrlen is None: |
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return |
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for n in range(addrlen): |
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addr = self._read_addr(fd) |
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if addr is None: |
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return |
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self.addrs.append(addr) |
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# peer size |
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self.peer_size = self._read_byte(fd) |
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if self.peer_size is None: |
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return |
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# other options |
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self.options = self._read_mapping(fd) |
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if self.options is None: |
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return |
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|
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# signature |
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self.signature = sha256(self._read(fd, 40)) |
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if self.signature is None: |
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return |
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self.valid = True |
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def verify(self): |
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""" |
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verify router identity |
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""" |
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#TODO: verify |
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def __repr__(self): |
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val = str() |
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val += 'NetDB Entry ' |
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val += 'pubkey={} '.format(b64encode(self.pubkey)) |
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val += 'signkey={} '.format(b64encode(self.signkey)) |
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val += 'options={} '.format(self.options) |
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val += 'addrs={} '.format(self.addrs) |
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val += 'cert={} '.format(self.cert) |
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val += 'published={} '.format(self.published) |
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val += 'signature={}'.format(b64encode(self.signature)) |
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return val |
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def dict(self): |
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""" |
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return dictionary in old format |
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""" |
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return dict({ |
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'pubkey':b64encode(self.pubkey), |
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'signkey':b64encode(self.signkey), |
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'options':self.options, |
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'addrs':self.addrs, |
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'cert':self.cert, |
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'published':self.published, |
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'signature':b64encode(self.signature) |
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}) |
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def inspect(hook=None,netdb_dir=os.path.join(os.environ['HOME'],'.i2pd','netDb')): |
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""" |
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iterate through the netdb |
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|
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parameters: |
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|
||||
hook - function taking 1 parameter |
||||
- the 1 parameter is a dictionary containing the info |
||||
of a netdb enrty |
||||
- called on every netdb entry |
||||
|
||||
netdb_dir - path to netdb folder |
||||
- defaults to $HOME/.i2pd/netDb/ |
||||
|
||||
""" |
||||
|
||||
insp = Inspector() |
||||
if hook is not None: |
||||
insp.inspect = hook |
||||
insp.run(netdb_dir) |
||||
|
||||
@ -1,13 +0,0 @@
@@ -1,13 +0,0 @@
|
||||
#!/usr/bin/env python |
||||
from setuptools import setup |
||||
|
||||
setup(name = 'baddiedetector', |
||||
version = '0.1', |
||||
description = 'i2p netdb blocklist tool', |
||||
author = 'Jeff Becker', |
||||
author_email = 'ampernand@gmail.com', |
||||
install_requires = ['python-geoip','python-geoip-geolite2'], |
||||
tests_require=['pytest'], |
||||
url = 'https://github.com/purplei2p/i2pd-tools', |
||||
packages = ['netdb', 'baddiefinder'], |
||||
) |
||||
@ -1,2 +0,0 @@
@@ -1,2 +0,0 @@
|
||||
import netdb |
||||
netdb.inspect() |
||||
@ -1,10 +0,0 @@
@@ -1,10 +0,0 @@
|
||||
This requires pytest to be installed. |
||||
It's not a dependency in setup.py because end users should not have to worry about testing. |
||||
|
||||
Here is how to install it: |
||||
|
||||
http://pytest.org/latest/getting-started.html#installation |
||||
|
||||
And to run it: |
||||
|
||||
py.test |
||||
@ -1,66 +0,0 @@
@@ -1,66 +0,0 @@
|
||||
# test_netdb.py - Test netdb.py |
||||
# Author: Chris Barry <chris@barry.im> |
||||
# License: MIT |
||||
|
||||
# Note: this uses py.test. |
||||
|
||||
import netdb,os,random |
||||
|
||||
''' |
||||
def test_inspect(): |
||||
netdb.inspect() |
||||
''' |
||||
|
||||
def test_sha256(): |
||||
assert('d2f4e10adac32aeb600c2f57ba2bac1019a5c76baa65042714ed2678844320d0' == netdb.netdb.sha256('i2p is cool', raw=False)) |
||||
|
||||
def test_address_valid(): |
||||
invalid = netdb.netdb.Address() |
||||
valid = netdb.netdb.Address() |
||||
valid.cost = 10 |
||||
valid.transport = 'SSU' |
||||
valid.options = {'host': '0.0.0.0', 'port': '1234', 'key': '', 'caps': ''} |
||||
valid.expire = 0 |
||||
assert(valid.valid() and not invalid.valid()) |
||||
|
||||
def test_address_repr(): |
||||
valid = netdb.netdb.Address() |
||||
valid.cost = 10 |
||||
valid.transport = 'SSU' |
||||
valid.options = {'host': '0.0.0.0', 'port': '1234', 'key': '', 'caps': ''} |
||||
valid.expire = 0 |
||||
assert(repr(valid) == 'Address: transport=SSU cost=10 expire=0 options={\'host\': \'0.0.0.0\', \'port\': \'1234\', \'key\': \'\', \'caps\': \'\'} location=None') |
||||
|
||||
# TODO: test_entry* |
||||
|
||||
def test_entry_read_short(): |
||||
assert(True) |
||||
def test_entry_read_mapping(): |
||||
assert(True) |
||||
def test_entry_read(): |
||||
assert(True) |
||||
def test_entry_read_short(): |
||||
assert(True) |
||||
def test_entry_read_byte(): |
||||
assert(True) |
||||
def test_entry_read_string(): |
||||
assert(True) |
||||
def test_entry_init(): |
||||
assert(True) |
||||
def test_entry_load(): |
||||
assert(True) |
||||
def test_entry_verify(): |
||||
assert(True) |
||||
def test_entry_repr(): |
||||
assert(True) |
||||
def test_entry_dict(): |
||||
assert(True) |
||||
|
||||
# Make some garbage files and hope they break things. |
||||
def test_fuzz(): |
||||
pwd = os.environ['PWD'] |
||||
for i in range(1,100): |
||||
with open('{}/fuzzdb/{}.dat'.format(pwd, i), 'wb') as fout: |
||||
fout.write(os.urandom(random.randint(2,400))) # replace 1024 with size_kb if not unreasonably large |
||||
# Now let's inspect the garbage. |
||||
netdb.inspect(netdb_dir='{}/fuzzdb/'.format(pwd)) |
||||
Loading…
Reference in new issue