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Copy pathcheck_https.py
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executable file
·329 lines (289 loc) · 11.3 KB
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#!/usr/bin/env python3
import argparse
import collections
import concurrent.futures
import errno
import logging
import json
import os
import random
import re
import shutil
import socket
import ssl
import time
from http.client import HTTPConnection, HTTPSConnection, HTTPException
from urllib.parse import urlsplit
import jinja2
from lxml import etree, html
PARALLELISM = 16
USER_AGENT = "Mozilla/5.0 Firefox/35.0 compatible HTTPSWatch Bot https://httpswatch.com"
ANALYTICS = """<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-342043-4', 'auto');
ga('send', 'pageview');
</script>
"""
META_XPATH = etree.XPath(
"//meta[not(ancestor::noscript) and re:test(@http-equiv, \"^refresh$\", \"i\")]",
namespaces={"re": "http://exslt.org/regular-expressions"}
)
MIXED_CONTENT_XPATH = etree.XPath(
"""
//link[@ref="stylesheet" and starts-with(@href, "http://")] |
//script[starts-with(@src, "http://")] |
//img[not(ancestor::noscript) and starts-with(@src, "http://")]
"""
)
log = logging.getLogger("check_https")
class Check:
def __init__(self):
pass
def succeed(self, desc):
self.failed = False
self.icon = "good"
self.description = desc
def fail(self, desc):
self.failed = True
self.icon = "bad"
self.description = desc
class Not200(Exception):
def __init__(self, status):
super(Exception, self).__init__()
self.status = status
def fetch_through_redirects(http, stop=None):
path = "/"
url = None
tree = None
while True:
http.request("GET", path, headers={"User-Agent": USER_AGENT})
resp = http.getresponse()
new_location = None
if resp.status == 200:
tree = html.parse(resp)
for meta in META_XPATH(tree):
m = re.match("0;\s*url=['\"](.+?)['\"]", meta.get("content"))
if m is not None:
new_location = m.groups()[0]
elif resp.status in (301, 302, 303, 307):
resp.read()
new_location = resp.getheader("Location")
if new_location is not None:
url = urlsplit(new_location)
if stop is not None and stop(url):
break
resp.close()
if url.netloc and url.netloc != http.host:
raise ValueError("{} redirects to a different domain.".format(url.netloc))
path = url.path
if not path.startswith("/"):
path = "/" + path
continue
if resp.status != 200:
raise Not200(resp.status)
break
return url, resp, tree
def has_mixed_content(tree):
s = MIXED_CONTENT_XPATH(tree)
return len(s) >= 1
def check_one_site(site):
domain = site["domain"]
log.info("Checking {}".format(domain))
site["status"] = "bad"
site["checks"] = checks = []
good_connection = Check()
checks.append(good_connection)
try:
addrs = socket.getaddrinfo(domain, 443, socket.AF_INET, proto=socket.IPPROTO_TCP)
except socket.gaierror:
log.warning("DNS lookup for {} failed!".format(domain))
return
info = random.choice(addrs)
sock = socket.socket(info[0], info[1], info[2])
sock.settimeout(10)
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
context.options |= ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3
# Some platforms (OS X) do not have OP_NO_COMPRESSION
context.options |= getattr(ssl, "OP_NO_COMPRESSION", 0)
context.verify_mode = ssl.CERT_REQUIRED
context.check_hostname = True
context.load_verify_locations("moz-certs.pem")
secure_sock = context.wrap_socket(sock, server_hostname=domain)
try:
secure_sock.connect(info[4])
except ConnectionRefusedError:
good_connection.fail("Nothing is listening on port 443.")
return
except socket.timeout:
good_connection.fail("<code>connect()</code> to port 443 times out.")
return
except ssl.SSLError as e:
if e.reason == "CERTIFICATE_VERIFY_FAILED":
desc = "Certificate not trusted by Mozilla cert store."
else:
desc = "A TLS-related error ({}) occurs when trying to connect.".format(e.reason)
good_connection.fail(desc)
return
except ssl.CertificateError:
good_connection.fail("Certificate hostname verification fails.")
return
except OSError as e:
error_name = errno.errorcode[e.errno]
good_connection.fail("<code>connect()</code> returns with error {}.".format(error_name))
return
msg = "A verified TLS connection can be established. "
grade = site.get("ssllabs_grade")
if grade is not None:
msg += "<a href=\"https://www.ssllabs.com/ssltest/analyze.html?d={}\">SSL Labs grade</a> is " + grade + "."
else:
msg += "(<a href=\"https://www.ssllabs.com/ssltest/analyze.html?d={}\">SSL Labs report</a>)"
good_connection.succeed(msg.format(domain))
mediocre = False
https_load = Check()
checks.append(https_load)
http = HTTPSConnection(domain, context=context)
http.sock = secure_sock
try:
def stop_on_http_or_domain_change(url):
return url.scheme == "http" or (url.netloc and url.netloc != domain)
final, resp, tree = fetch_through_redirects(http, stop_on_http_or_domain_change)
if final is not None and final.scheme == "http":
https_load.fail("The HTTPS site redirects to HTTP.")
return
if tree is not None and has_mixed_content(tree):
https_load.fail("The HTML page loaded over HTTPS has mixed content.")
return
good_sts = Check()
checks.append(good_sts)
sts = resp.getheader("Strict-Transport-Security")
if sts is not None:
m = re.search("max-age=(\d+)", sts)
if m is not None:
age = int(m.group(1))
if age >= 2592000:
good_sts.succeed("<code>Strict-Transport-Security</code> header is set with a long <code>max-age</code> directive.")
else:
good_sts.fail("<code>Strict-Transport-Security</code> header is set but the <code>max-age</code> is less than 30 days.")
else:
good_sts.fail("<code>Strict-Transport-Security</code> header doesn't contain a <code>max-age</code> directive.")
else:
good_sts.fail("<code>Strict-Transport-Security</code> header is not set.")
if good_sts.failed:
mediocre = True
except socket.timeout:
https_load.fail("Requesting HTTPS page times out.")
return
except Not200 as e:
https_load.fail("The HTTPS site returns an error status ({}) on request.".format(e.status))
return
except OSError as e:
err_msg = errno.errorcode[e.errno]
https_load.fail("Encountered error ({}) while loading HTTPS site.".format(err_msg))
return
finally:
http.close()
https_load.succeed("A page can be successfully fetched over HTTPS.")
http_redirect = Check()
checks.append(http_redirect)
http = HTTPConnection(domain)
try:
def stop_on_https(url):
return url.scheme == "https"
final, resp, tree = fetch_through_redirects(http, stop_on_https)
if final is not None and final.scheme == "https":
http_redirect.succeed("HTTP site redirects to HTTPS.")
else:
http_redirect.fail("HTTP site doesn't redirect to HTTPS.")
mediocre = True
except HTTPException:
http_redirect.fail("Encountered HTTP error while loading HTTP site.")
return
except Not200 as e:
http_redirect.fail("The HTTP site returns an error status ({}) on request.".format(e.status))
return
except OSError as e:
err_msg = errno.errorcode[e.errno]
http_redirect.fail("Encountered error ({}) while loading HTTP site.".format(err_msg))
return
finally:
http.close()
site["status"] = "mediocre" if mediocre else "good"
def regenerate_everything(ssllabs_grades_file):
with open("config/meta.json", "r", encoding="utf-8") as fp:
meta = json.load(fp)
ssllabs_grades = {}
if ssllabs_grades_file is not None:
with open(ssllabs_grades_file, "r", encoding="utf-8") as fp:
ssllabs_grades = json.load(fp)
futures = []
executor = concurrent.futures.ThreadPoolExecutor(max_workers=PARALLELISM)
for listing in meta["listings"]:
if "external" in listing:
continue
with open("config/{}.json".format(listing["shortname"]), encoding="utf-8") as fp:
listing["data"] = json.load(fp)
for cat in listing["data"]["categories"]:
for site in cat["sites"]:
domain = site["domain"]
if domain in ssllabs_grades:
site["ssllabs_grade"] = ssllabs_grades[domain]
futures.append(executor.submit(check_one_site, site))
with executor:
while True:
done, not_done = concurrent.futures.wait(futures, timeout=1)
print("{}/{}".format(len(done), len(done) + len(not_done)))
if not not_done:
break
for f in futures:
# This will raise an exception if check_one_site did.
f.result()
for listing in meta["listings"]:
if "external" in listing:
continue
for cat in listing["data"]["categories"]:
cat_status = collections.Counter()
for site in cat["sites"]:
cat_status[site["status"]] += 1
cat["counts"] = cat_status
return meta
def encode_check(o):
if not isinstance(o, Check):
raise TypeError
return o.__dict__
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--cached", action="store_true")
parser.add_argument("--ssllabs")
args = parser.parse_args()
if args.cached:
with open("cache.json", "r", encoding="utf-8") as fp:
meta = json.load(fp)
else:
meta = regenerate_everything(args.ssllabs)
with open("cache.json", "w", encoding="utf-8") as fp:
json.dump(meta, fp, default=encode_check)
# Write out results.
env = jinja2.Environment(loader=jinja2.FileSystemLoader("templates"))
env.globals["analytics"] = ANALYTICS
env.globals["update_time"] = time.strftime("%Y-%m-%d %H:%MZ", time.gmtime())
env.globals["meta"] = meta
try:
os.mkdir("out")
except FileExistsError:
pass
with open("out/about.html", "w", encoding="utf-8") as fp:
fp.write(env.get_template("about.html.jinja").render())
listing_tmp = env.get_template("listing.html.jinja")
for listing in meta["listings"]:
if "external" in listing:
continue
out_fn = "out/{}.html".format(listing["shortname"])
with open(out_fn, "w", encoding="utf-8") as fp:
fp.write(listing_tmp.render(listing=listing))
if meta["default_page"] == listing["shortname"]:
shutil.copy(out_fn, "out/index.html")
if __name__ == "__main__":
main()
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