misp-warninglists/tools/generator.py

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import datetime
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import ipaddress
import json
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import logging
from inspect import currentframe, getframeinfo, getmodulename, stack
from os import mkdir, path
from typing import List, Union
import requests
import dns.exception
import dns.resolver
from dateutil.parser import parse as parsedate
def init_logging():
rel_path = getframeinfo(currentframe()).filename
current_folder = path.dirname(path.abspath(rel_path))
LOG_DIR = path.join(current_folder, '../generators.log')
logFormatter = logging.Formatter(
"[%(asctime)s] %(levelname)s::%(funcName)s()::%(message)s")
rootLogger = logging.getLogger()
rootLogger.setLevel(logging.INFO)
# Log to file
fileHandler = logging.FileHandler(LOG_DIR)
fileHandler.setFormatter(logFormatter)
rootLogger.addHandler(fileHandler)
# Log to console too
''' consoleHandler = logging.StreamHandler()
consoleHandler.setFormatter(logFormatter)
rootLogger.addHandler(consoleHandler) '''
return rootLogger
init_logging()
def download_to_file(url, file):
frame_records = stack()[1]
caller = getmodulename(frame_records[1]).upper()
user_agent = {
"User-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0"}
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try:
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logging.info(f'download_to_file - fetching url: {url}')
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r = requests.head(url, headers=user_agent)
url_datetime = parsedate(r.headers['Last-Modified']).astimezone()
file_datetime = datetime.datetime.fromtimestamp(
path.getmtime(get_abspath_source_file(file))).astimezone()
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if(url_datetime > file_datetime):
logging.info('{} File on server is newer, so downloading update to {}'.format(
caller, get_abspath_source_file(file)))
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actual_download_to_file(url, file, user_agent)
else:
logging.info(
'{} File on server is older, nothing to do'.format(caller))
except KeyError as exc:
logging.warning('{} KeyError in the headers. the {} header was not sent by server {}. Downloading file'.format(
caller, str(exc), url))
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actual_download_to_file(url, file, user_agent)
except FileNotFoundError as exc:
logging.info(
"{} File didn't exist, so downloading {} from {}".format(caller, file, url))
actual_download_to_file(url, file, user_agent)
except Exception as exc:
logging.warning(
'{} General exception occured: {}.'.format(caller, str(exc)))
actual_download_to_file(url, file, user_agent)
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def actual_download_to_file(url, file, user_agent):
r = requests.get(url, headers=user_agent)
with open(get_abspath_source_file(file), 'wb') as fd:
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for chunk in r.iter_content(4096):
fd.write(chunk)
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def process_stream(url):
r = requests.get(url, stream=True)
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data_list = []
for line in r.iter_lines():
v = line.decode('utf-8')
if not v.startswith("#"):
if v:
data_list.append(v)
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return data_list
def download(url):
user_agent = {
"User-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0"}
return requests.get(url, headers=user_agent)
def get_abspath_list_file(dst):
rel_path = getframeinfo(currentframe()).filename
current_folder = path.dirname(path.abspath(rel_path))
real_path = path.join(
current_folder, '../lists/{dst}/list.json'.format(dst=dst))
return path.abspath(path.realpath(real_path))
def get_abspath_source_file(dst):
rel_path = getframeinfo(currentframe()).filename
current_folder = path.dirname(path.abspath(rel_path))
tmp_path = path.join(current_folder, '../tmp/')
if not path.exists(tmp_path):
mkdir(tmp_path)
return path.abspath(path.realpath(path.join(tmp_path, '{dst}'.format(dst=dst))))
def get_version():
return int(datetime.date.today().strftime('%Y%m%d'))
def unique_sorted_warninglist(warninglist):
warninglist['list'] = sorted(set(warninglist['list']))
return warninglist
def write_to_file(warninglist, dst):
frame_records = stack()[1]
caller = getmodulename(frame_records[1]).upper()
try:
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warninglist = unique_sorted_warninglist(warninglist)
with open(get_abspath_list_file(dst), 'w') as data_file:
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json.dump(warninglist, data_file, indent=2, sort_keys=True)
data_file.write("\n")
logging.info('New warninglist written to {}.'.format(
get_abspath_list_file(dst)))
except Exception as exc:
logging.error(
'{} General exception occurred: {}.'.format(caller, str(exc)))
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def consolidate_networks(networks):
# Split to IPv4 and IPv6 ranges
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ipv4_networks = []
ipv6_networks = []
for network in networks:
if isinstance(network, str):
# Convert string to IpNetwork
network = ipaddress.ip_network(network)
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if network.version == 4:
ipv4_networks.append(network)
else:
ipv6_networks.append(network)
# Collapse ranges
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networks_to_keep = list(map(str, ipaddress.collapse_addresses(ipv4_networks)))
networks_to_keep.extend(map(str, ipaddress.collapse_addresses(ipv6_networks)))
return networks_to_keep
def create_resolver() -> dns.resolver.Resolver:
resolver = dns.resolver.Resolver(configure=False)
resolver.timeout = 30
resolver.lifetime = 30
resolver.cache = dns.resolver.LRUCache()
resolver.nameservers = ["193.17.47.1", "185.43.135.1"] # CZ.NIC nameservers
return resolver
class Dns:
def __init__(self, resolver: dns.resolver.Resolver):
self.__resolver = resolver
def _parse_spf(self, domain: str, spf: str) -> dict:
output = {"include": [], "ranges": [], "a": [], "mx": []}
for part in spf.split(" "):
if part.startswith("include:"):
output["include"].append(part.split(":", 1)[1])
elif part.startswith("redirect="):
output["include"].append(part.split("=", 1)[1])
elif part == "a":
output["a"].append(domain)
elif part.startswith("a:"):
output["a"].append(part.split(":", 1)[1])
elif part == "mx":
output["mx"].append(domain)
elif part.startswith("mx:"):
output["mx"].append(part.split(":", 1)[1])
elif part.startswith("ip4:") or part.startswith("ip6:"):
output["ranges"].append(ipaddress.ip_network(part.split(":", 1)[1], strict=False))
return output
def get_ip_for_domain(self, domain: str) -> List[Union[ipaddress.IPv4Address, ipaddress.IPv6Address]]:
ranges = []
try:
for ip in self.__resolver.query(domain, "a"):
ranges.append(ipaddress.IPv4Address(str(ip)))
except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers):
pass
try:
for ip in self.__resolver.query(domain, "aaaa"):
ranges.append(ipaddress.IPv6Address(str(ip)))
except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers):
pass
return ranges
def get_mx_ips_for_domain(self, domain: str) -> List[Union[ipaddress.IPv4Address, ipaddress.IPv6Address]]:
ranges = []
try:
for rdata in self.__resolver.query(domain, "mx"):
ranges += self.get_ip_for_domain(rdata.exchange)
except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers):
pass
return ranges
def get_ip_ranges_from_spf(self, domain: str) -> List[Union[ipaddress.IPv4Network, ipaddress.IPv6Network]]:
try:
txt_records = self.__resolver.query(domain, "TXT")
except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN, dns.exception.Timeout, dns.resolver.NoNameservers) as e:
logging.info("Could not fetch TXT record for domain {}: {}".format(domain, str(e)))
return []
ranges = []
for rdata in txt_records:
record = "".join([s.decode("utf-8") for s in rdata.strings])
if not record.startswith("v=spf1"):
continue
parsed = self._parse_spf(domain, record)
ranges += parsed["ranges"]
for include in parsed["include"]:
ranges += self.get_ip_ranges_from_spf(include)
for domain in parsed["a"]:
ranges += map(ipaddress.ip_network, self.get_ip_for_domain(domain))
for mx in parsed["mx"]:
ranges += map(ipaddress.ip_network, self.get_mx_ips_for_domain(mx))
return ranges
def main():
init_logging()
if __name__ == '__main__':
main()