Improvements

exclude_badExits.py

@@ -83,6 +83,7 @@ import sys
 
 import os
 import re
+import socket
 import time
 import argparse
 from io import StringIO
@@ -120,6 +121,7 @@ LOG = logging.getLogger()
 
 ETC_DIR = '/etc/tor/yaml'
 aTRUST_DB = {}
+aTRUST_DB_INDEX = {}
 sDETAILS_URL = "https://metrics.torproject.org/rs.html#details/"
 # You can call this while bootstrapping
 sEXCLUDE_EXIT_KEY = 'ExcludeNodes'
@@ -131,14 +133,30 @@ sINCLUDE_GUARD_KEY = 'EntryNodes'
 lKNOWN_NODNS = [
     '0x0.is',
     'a9.wtf',
+    'artikel5ev.de',
     'arvanode.net',
     'dodo.pm',
+    'dra-family.github.io',
+    'eraldonion.org',
     'galtland.network',
     'interfesse.net',
     'kryptonit.org',
+    'lonet.sh',
+    'moneneis.de',
     'nx42.de',
+    'ormycloud.org',
+    'plied-privacy.net',
+    'rification-for-nusenu.net',
+    'sv.ch',
+    'thingtohide.nl',
+    'tikel10.org',
     'tor-exit-2.aa78i2efsewr0neeknk.xyz',
     'tor-exit-3.aa78i2efsewr0neeknk.xyz',
+    'torix-relays.org',
+    'tse.com',
+    'tuxli.org',
+    'w.digidow.eu',
+    'www.quintex.com',
 ]
 def oMakeController(sSock='', port=9051):
     import getpass
@@ -157,7 +175,6 @@ def lYamlBadNodes(sFile,
                   section=sEXCLUDE_EXIT_KEY,
                   lWanted=['BadExit']):
     global oBAD_NODES
-    root = 'ExcludeNodes'
     l = []
     if not yaml: return l
     if os.path.exists(sFile):
@@ -166,54 +183,19 @@ def lYamlBadNodes(sFile,
             oBAD_NODES = o
 
         # BROKEN
+#    root = 'ExcludeNodes'
 #        for elt in o[oBAD_ROOT][root][section].keys():
 #            if lWanted and elt not in lWanted: continue
 #            # l += o[oBAD_ROOT][root][section][elt]
 
+    global lKNOWN_NODNS
+    root = 'ExcludeDomains'
+    if root not in o[oBAD_ROOT] or not o[oBAD_ROOT][root]:
+        o[oBAD_ROOT][root] = lKNOWN_NODNS
+    else:
+        lKNOWN_NODNS = o[oBAD_ROOT][root]
     return l
 
-def icheck_torrc(sFile, oArgs):
-    l = open(sFile, 'rt').readlines()
-    a = {}
-    for elt in l:
-        elt = elt.strip()
-        if not elt or not ' ' in elt: continue
-        k,v = elt.split(' ', 1)
-        a[k] = v
-    keys = a
-
-    if 'HashedControlPassword' not in keys:
-        LOG.info('Add HashedControlPassword for security')
-        print('run: tor --hashcontrolpassword <TopSecretWord>')
-    if 'ExcludeExitNodes' in keys:
-        elt = 'BadNodes.ExcludeExitNodes.BadExit'
-        LOG.warn(f"Remove ExcludeNodes and move then to {oArgs.bad_nodes}")
-        print(f"move to the {elt} section as a list")
-    if 'GuardNodes' in keys:
-        elt = 'GoodNodes.GuardNodes'
-        LOG.warn(f"Remove GuardNodes and move then to {oArgs.good_nodes}")
-        print(f"move to the {elt} section as a list")
-    if 'ExcludeNodes' in keys:
-        elt = 'BadNodes.ExcludeNodes.BadExit'
-        LOG.warn(f"Remove ExcludeNodes and move then to {oArgs.bad_nodes}")
-        print(f"move to the {elt} section as a list")
-    if 'ControlSocket' not in keys and os.path.exists('/run/tor/control'):
-        LOG.info('Add ControlSocket /run/tor/control for us')
-        print('ControlSocket /run/tor/control GroupWritable RelaxDirModeCheck')
-    if 'UseMicrodescriptors' not in keys or keys['UseMicrodescriptors'] != '1':
-        LOG.info('Add UseMicrodescriptors 0 for us')
-        print('UseMicrodescriptors 0')
-    if 'AutomapHostsSuffixes' not in keys:
-        LOG.info('Add AutomapHostsSuffixes for onions')
-        print('AutomapHostsSuffixes .exit,.onion')
-    if 'AutoMapHostsOnResolve' not in keys:
-        LOG.info('Add AutoMapHostsOnResolve for onions')
-        print('AutoMapHostsOnResolve 1')
-    if 'VirtualAddrNetworkIPv4' not in keys:
-        LOG.info('Add VirtualAddrNetworkIPv4 for onions')
-        print('VirtualAddrNetworkIPv4 172.16.0.0/12')
-    return 0
-
 oGOOD_NODES = {}
 oGOOD_ROOT = 'GoodNodes'
 def lYamlGoodNodes(sFile='/etc/tor/torrc-goodnodes.yaml'):
@@ -248,13 +230,14 @@ def lIntroductionPoints(controller, lOnions):
             l += [introduction_point.address]
     return l
 
-lBAD_URLS = []
+tBAD_URLS = set()
 lATS = ['abuse', 'email']
 lINTS = ['ciissversion', 'uplinkbw', 'signingkeylifetime', 'memory']
 lBOOLS =  ['dnssec', 'dnsqname', 'aesni', 'autoupdate', 'dnslocalrootzone',
            'sandbox', 'offlinemasterkey']
 def aVerifyContact(a, fp, https_cafile, timeout=20, host='127.0.0.1', port=9050):
-    global lBAD_URLS
+    global tBAD_URLS
+    global lKNOWN_NODNS
     # cleanups for yaml
     for elt in lINTS:
         if elt in a:
@@ -271,12 +254,17 @@ def aVerifyContact(a, fp, https_cafile, timeout=20, host='127.0.0.1', port=9050)
 
     a.update({'fps': []})
     keys = list(a.keys())
-    
     # test the url for fps and add it to the array
     if 'proof' not in keys:
         LOG.warn(f"{fp} 'proof' not in {keys}")
         return a
 
+    if aTRUST_DB_INDEX and fp in aTRUST_DB_INDEX.keys():
+        aCachedContact = aTRUST_DB_INDEX[fp]
+        if aCachedContact['email'] = a['email']:
+            return aCachedContact
+        
+       
     if 'url' not in keys:
         if 'uri' not in keys:
             a['url'] = ''
@@ -292,12 +280,21 @@ def aVerifyContact(a, fp, https_cafile, timeout=20, host='127.0.0.1', port=9050)
         a['url'] = 'https:' +a['url']
         
     # domain should be a unique key for contacts
-    domain = a['url'][8:]
+    domain = a['url'][8:].strip('/')
     try:
         ip = sTorResolve(domain)
     except Exception as e:
-        lpair = getaddrinfo(domain, 443)
+        try:
-        if lpait is None:
+            lpair = getaddrinfo(domain, 443)
+        except (socket.gaierror, ) as e:
+            LOG.debug("{e}")
+            lpair = None
+            lKNOWN_NODNS.append(domain)
+        except Exception as e:
+            LOG.warn("{e}")
+            lpair = None
+            lKNOWN_NODNS.append(domain)
+        if lpair is None:
             LOG.warn(f"TorResolv and getaddrinfo failed for {domain}")
             return a
         ip = lpair[0]
@@ -324,24 +321,24 @@ def aVerifyContact(a, fp, https_cafile, timeout=20, host='127.0.0.1', port=9050)
         LOG.exception(f"AttributeError downloading from {domain} {e}")
     except CertificateError as e:
         LOG.warn(f"CertificateError downloading from {domain} {e}")
-        lBAD_URLS += [a['url']]
+        tBAD_URLS.add(a['url'])
     except TrustorError as e:
         LOG.warn(f"TrustorError downloading from {domain} {e.args}")
-        lBAD_URLS += [a['url']]
+        tBAD_URLS.add(a['url'])
     except (BaseException ) as e:
         LOG.error(f"Exception {type(e)} downloading from {domain} {e}")
     else:
         if o.status_code >= 300:
             LOG.warn(f"Error downloading from {domain} {o.status_code} {o.reason}")
             # any reason retry?
-            lBAD_URLS += [a['url']]
+            tBAD_URLS.add(a['url'])
             return a
             
         l = o.text.upper().strip().split('\n')
         if not l:
             # already squacked in lD
             LOG.warn(f"Downloading from {domain} empty for {fp}")
-            lBAD_URLS += [a['url']]
+            tBAD_URLS.add(a['url'])
         else:
             a['fps'] = [elt for elt in l if elt and len(elt) == 40
                         and not elt.startswith('#')]
@@ -521,13 +518,23 @@ def iMain(lArgs):
         icheck_torrc(sFile, oArgs)
 
     global aTRUST_DB
+    global aTRUST_DB_INDEX
+    
     sFile = oArgs.proof_output
     if sFile and os.path.exists(sFile):
         try:
             with open(sFile, 'rt') as oFd:
                 aTRUST_DB = yaml.safe_load(oFd)
-        except:
+            # reverse lookup of fps to contacts
-             aTRUST_DB = {}
+            # but...
+            for k,v in aTRUST_DB:
+                aTRUST_DB_INDEX[k] = v
+                if 'fps' in aTRUST_DB[k].keys():
+                    for fp in aTRUST_DB[k]['fps']:
+                        aTRUST_DB_INDEX[fp] = v
+                        
+        except Exception as e:
+            LOG.warn(f"Error reading YAML TrustDB {sFile} {e}")
 
     if os.path.exists(oArgs.proxy_ctl):
         controller = oMakeController(sSock=oArgs.proxy_ctl)
@@ -615,7 +622,12 @@ def iMain(lArgs):
             i = c.find(' ')
             if i >=0:
                 c = c[:i]
-            LOG.info(f"{relay.fingerprint} skipping 'dns-rsa' {c} {sofar}")
+            if c in lKNOWN_NODNS:
+                LOG.info(f"{relay.fingerprint} skipping in lKNOWN_NODNS {c} {sofar}")
+                exit_excludelist.append(relay.fingerprint)
+                continue
+            
+            LOG.info(f"skipping 'dns-rsa' {relay.fingerprint}.{c} {sofar}")
             iDnsContact += 1
             continue
         
@@ -626,17 +638,18 @@ def iMain(lArgs):
                 LOG.warn(f"{relay.fingerprint} did not parse {sofar}")
                 exit_excludelist.append(relay.fingerprint)
                 continue
-            if 'url' in a and a['url'] and a['url'] in lBAD_URLS:
+            if 'url' in a and a['url']:
-                # The fp is using a contact with a URL we know is bad
+                if a['url'] in tBAD_URLS:
-                LOG.info(f"{relay.fingerprint} skipping in lBAD_URLS {a['url']}  {sofar}")
+                    # The fp is using a contact with a URL we know is bad
-                exit_excludelist.append(relay.fingerprint)
+                    LOG.info(f"{relay.fingerprint} skipping in tBAD_URLS {a['url']}  {sofar}")
-                continue
+                    exit_excludelist.append(relay.fingerprint)
-            domain = a['url'][8:]
+                    continue
-            if domain in lKNOWN_NODNS:
+                domain = a['url'].replace('https://', '').replace('http://', '')
-                # The fp is using a contact with a URL we know is nonexistent
+                if domain in lKNOWN_NODNS:
-                LOG.info(f"{relay.fingerprint} skipping in lKNOWN_NODNS {a['url']}  {sofar}")
+                    # The fp is using a contact with a URL we know is bogus
-                exit_excludelist.append(relay.fingerprint)
+                    LOG.info(f"{relay.fingerprint} skipping in lKNOWN_NODNS {a['url']} {sofar}")
-                continue
+                    exit_excludelist.append(relay.fingerprint)
+                    continue
                 
 
             b = aVerifyContact(list(a.values())[0],
@@ -664,6 +677,10 @@ def iMain(lArgs):
 
             # great contact had good fps and we are in them
             lProofGoodFps += b['fps']
+            if relay.fingerprint in aProofUri.keys():
+                # a cached entry
+                continue
+            
             LOG.info(f"{relay.fingerprint} verified {b['url']} {sofar}")
             # add our contact info to the trustdb
             aProofUri[relay.fingerprint] = b
@@ -706,7 +723,10 @@ def iMain(lArgs):
 
     global oBAD_NODES
     oBAD_NODES['BadNodes']['ExcludeNodes']['BadExit'] = exit_excludelist
+    global lKNOWN_NODNS
+    o[oBAD_ROOT]['ExcludeDomains'] = lKNOWN_NODNS
     vwrite_badnodes(oArgs)
+    
     global oGOOD_NODES
     oGOOD_NODES['GoodNodes']['Relays']['ExitNodes'] = lProofGoodFps
     vwrite_goodnodes(oArgs)
@@ -739,7 +759,7 @@ def iMain(lArgs):
         except stem.SocketClosed as e:
             LOG.errro(f"Failed setting {sINCLUDE_EXIT_KEY} good exit nodes in Tor")
             retval += 1
-        )
+
         return retval
 
     except InvalidRequest as e:

https_adapter.py

@@ -261,3 +261,70 @@ class HTTPSAdapter(HTTPAdapter):
                 raise
 
         return self.build_response(request, resp)
+
+from urllib3.util.ssl_match_hostname import match_hostname as _match_hostname
+def match_hostname(cert, hostname):
+    """Verify that *cert* (in decoded format as returned by
+    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+    rules are followed, but IP addresses are not accepted for *hostname*.
+
+    CertificateError is raised on failure. On success, the function
+    returns nothing.
+    """
+    if not cert:
+        raise ValueError(
+            "empty or no certificate, match_hostname needs a "
+            "SSL socket or SSL context with either "
+            "CERT_OPTIONAL or CERT_REQUIRED"
+        )
+    try:
+        # Divergence from upstream: ipaddress can't handle byte str
+        host_ip = ipaddress.ip_address(_to_unicode(hostname))
+    except (UnicodeError, ValueError):
+        # ValueError: Not an IP address (common case)
+        # UnicodeError: Divergence from upstream: Have to deal with ipaddress not taking
+        # byte strings.  addresses should be all ascii, so we consider it not
+        # an ipaddress in this case
+        host_ip = None
+    except AttributeError:
+        # Divergence from upstream: Make ipaddress library optional
+        if ipaddress is None:
+            host_ip = None
+        else:  # Defensive
+            raise
+    dnsnames = []
+    san = cert.get("subjectAltName", ())
+    for key, value in san:
+        if key == "DNS":
+            if host_ip is None and _dnsname_match(value, hostname):
+                return
+            dnsnames.append(value)
+        elif key == "IP Address":
+            if host_ip is not None and _ipaddress_match(value, host_ip):
+                return
+            dnsnames.append(value)
+    if not dnsnames:
+        # The subject is only checked when there is no dNSName entry
+        # in subjectAltName
+        for sub in cert.get("subject", ()):
+            for key, value in sub:
+                # XXX according to RFC 2818, the most specific Common Name
+                # must be used.
+                if key == "commonName":
+                    if _dnsname_match(value, hostname):
+                        return
+                    dnsnames.append(value)
+    if len(dnsnames) > 1:
+        # soften this to allow subdomain matching
+        raise CertificateError(
+            "hostname %r "
+            "doesn't match any of %s" % (hostname, ", ".join(map(repr, dnsnames)))
+        )
+    elif len(dnsnames) == 1:
+        raise CertificateError("hostname %r doesn't match %r" % (hostname, dnsnames[0]))
+    else:
+        raise CertificateError(
+            "no appropriate commonName or subjectAltName fields were found"
+        )
+from urllib3.util.ssl_match_hostname = match_hostname
+

support_onions.py

@@ -2,19 +2,18 @@
 
 import os
 import sys
-import argparse
 import re
 import traceback
-import logging
 import shutil
-import json
 import socket
 import select
-from ctypes import *
+import time
-import time, contextlib
+
-import unittest
+global LOG
-from random import Random
+import logging
-random = Random()
+import warnings
+warnings.filterwarnings('ignore')
+LOG = logging.getLogger()
 
 bHAVE_TORR = shutil.which('tor-resolve')
 
@@ -78,6 +77,7 @@ def sTorResolve(target,
                 ):
     MAX_INFO_RESPONSE_PACKET_LENGTH = 8
 
+    target = target.strip('/')
     seb = b"\o004\o360\o000\o000\o000\o000\o000\o001\o000"
     seb = b"\x04\xf0\x00\x00\x00\x00\x00\x01\x00"
     seb += bytes(target, 'US-ASCII') + b"\x00"
@@ -158,3 +158,45 @@ def getaddrinfo(sHost, sPort):
         return None
     return lPair
 
+def icheck_torrc(sFile, oArgs):
+    l = open(sFile, 'rt').readlines()
+    a = {}
+    for elt in l:
+        elt = elt.strip()
+        if not elt or not ' ' in elt: continue
+        k,v = elt.split(' ', 1)
+        a[k] = v
+    keys = a
+
+    if 'HashedControlPassword' not in keys:
+        LOG.info('Add HashedControlPassword for security')
+        print('run: tor --hashcontrolpassword <TopSecretWord>')
+    if 'ExcludeExitNodes' in keys:
+        elt = 'BadNodes.ExcludeExitNodes.BadExit'
+        LOG.warn(f"Remove ExcludeNodes and move then to {oArgs.bad_nodes}")
+        print(f"move to the {elt} section as a list")
+    if 'GuardNodes' in keys:
+        elt = 'GoodNodes.GuardNodes'
+        LOG.warn(f"Remove GuardNodes and move then to {oArgs.good_nodes}")
+        print(f"move to the {elt} section as a list")
+    if 'ExcludeNodes' in keys:
+        elt = 'BadNodes.ExcludeNodes.BadExit'
+        LOG.warn(f"Remove ExcludeNodes and move then to {oArgs.bad_nodes}")
+        print(f"move to the {elt} section as a list")
+    if 'ControlSocket' not in keys and os.path.exists('/run/tor/control'):
+        LOG.info('Add ControlSocket /run/tor/control for us')
+        print('ControlSocket /run/tor/control GroupWritable RelaxDirModeCheck')
+    if 'UseMicrodescriptors' not in keys or keys['UseMicrodescriptors'] != '1':
+        LOG.info('Add UseMicrodescriptors 0 for us')
+        print('UseMicrodescriptors 0')
+    if 'AutomapHostsSuffixes' not in keys:
+        LOG.info('Add AutomapHostsSuffixes for onions')
+        print('AutomapHostsSuffixes .exit,.onion')
+    if 'AutoMapHostsOnResolve' not in keys:
+        LOG.info('Add AutoMapHostsOnResolve for onions')
+        print('AutoMapHostsOnResolve 1')
+    if 'VirtualAddrNetworkIPv4' not in keys:
+        LOG.info('Add VirtualAddrNetworkIPv4 for onions')
+        print('VirtualAddrNetworkIPv4 172.16.0.0/12')
+    return 0
+

trustor_poc.py

@@ -8,6 +8,7 @@ import requests
 from stem.control import Controller
 from stem.util.tor_tools import *
 from urllib.parse import urlparse
+from urllib3.util.retry import Retry
 
 try:
     # unbound is not on pypi
@@ -29,13 +30,8 @@ try:
 except:
     TorContactInfoParser = None
 
-# for now we support max_depth = 0 only
-# this PoC version has no support for recursion
-# https://github.com/nusenu/tor-relay-operator-ids-trust-information#trust-information-consumers
-supported_max_depths = ['0']
 
-# https://github.com/nusenu/ContactInfo-Information-Sharing-Specification#ciissversion
+class TrustorError(Exception): pass
-accepted_ciissversions = ['2']
 
 # https://stackoverflow.com/questions/2532053/validate-a-hostname-string
 # FIXME this check allows non-fqdn names
@@ -47,7 +43,6 @@ def is_valid_hostname(hostname):
     allowed = re.compile("(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
     return all(allowed.match(x) for x in hostname.split("."))
 
-
 def read_local_trust_config(trust_config):
     '''
     reads a local configuration file containing trusted domains
@@ -55,6 +50,12 @@ def read_local_trust_config(trust_config):
     '''
 
     result = []
+    
+    # for now we support max_depth = 0 only
+    # this PoC version has no support for recursion
+    # https://github.com/nusenu/tor-relay-operator-ids-trust-information#trust-information-consumers
+    supported_max_depths = ['0']
+
     if (os.path.isfile(trust_config)):
         f = open(trust_config)
         for line in f:
@@ -150,6 +151,8 @@ def find_validation_candidates(controller, trusted_domains=[],validation_cache=[
     # https://github.com/nusenu/ContactInfo-Information-Sharing-Specification#proof
     accepted_proof_types = ['uri-rsa','dns-rsa']
 
+    # https://github.com/nusenu/ContactInfo-Information-Sharing-Specification#ciissversion
+    accepted_ciissversions = ['2']
 
     result = {}
 
@@ -202,7 +205,7 @@ def find_validation_candidates(controller, trusted_domains=[],validation_cache=[
                             result[domain] = {prooftype : [fingerprint]}
     return result
 
-def lDownloadUrlFps(domain, sCAfile, timeout=30, host='127.0.0.1', port=9050):
+def oDownloadUrl(domain, sCAfile, timeout=30, host='127.0.0.1', port=9050):
     uri="https://"+domain+"/.well-known/tor-relay/rsa-fingerprint.txt"
     # socks proxy used for outbound web requests (for validation of proofs)
     proxy = {'https': 'socks5h://' +host +':' +str(port)}
@@ -216,28 +219,28 @@ def lDownloadUrlFps(domain, sCAfile, timeout=30, host='127.0.0.1', port=9050):
         # urllib3.connection WARNING Certificate did not match expected hostname:
         head = requests.head(uri, timeout=timeout, proxies=proxy, headers=headers)
     except Exception as e:
-        LOG.warn(f"HTTP HEAD request failed for {uri} {e}")
+        raise TrustorError(f"HTTP HEAD request failed for {uri} {e}")
-        head = None
-        return []
-    if head.status_code != 200:
-        return []
-    if not head.headers['Content-Type'].startswith('text/plain'):
-        return []
     
-    assert os.path.exists(sCAfile), sCAfile
+    if head.status_code >= 300:
+        raise TrustorError(f"HTTP Errorcode {head.status_code}")
+    if not head.headers['Content-Type'].startswith('text/plain'):
+        raise TrustorError(f"HTTP Content-Type != text/plain")
+    if not os.path.exists(sCAfile):
+        raise TrustorError(f"File not found CAfile {sCAfile}")
     try:
         from https_adapter import HTTPSAdapter
     except Exception as e:
         LOG.warn(f"Could not import HTTPSAdapter {e}")
         HTTPSAdapter = None
-    HTTPSAdapter = None
+
     try:
         with requests.sessions.Session() as session:
             if HTTPSAdapter:
+                retries = Retry(connect=3, read=2, redirect=0)
                 # FixMe: upgrade to TLS1.3
                 session.mount("https://", HTTPSAdapter(pool_maxsize=1,
-                                                       max_retries=3,))
+                                                       max_retries=retries,))
-            fullfile = session.request(method="get", url=uri,
+            oReqResp = session.request(method="get", url=uri,
                                        proxies=proxy, timeout=timeout,
                                        headers=headers,
                                        allow_redirects=False,
@@ -245,16 +248,21 @@ def lDownloadUrlFps(domain, sCAfile, timeout=30, host='127.0.0.1', port=9050):
                                        )
     except:
         LOG.warn("HTTP GET request failed for %s" % uri)
-        return []
+        raise
-    if fullfile.status_code != 200 or not fullfile.headers['Content-Type'].startswith('text/plain'):
+    if oReqResp.status_code != 200:
-        return []
+        raise TrustorError(f"HTTP Errorcode {head.status_code}")
+    if not oReqResp.headers['Content-Type'].startswith('text/plain'):
+        raise TrustorError(f"HTTP Content-Type != text/plain")
 
     #check for redirects (not allowed as per spec)
-    if fullfile.url != uri:
+    if oReqResp.url != uri:
-        LOG.error('Redirect detected %s vs %s (final)' % (uri, fullfile.url))
+        LOG.error(f'Redirect detected %s vs %s (final)' % (uri, oReqResp.url))
-        return []
+        raise TrustorError(f'Redirect detected %s vs %s (final)' % (uri, oReqResp.url))
+    return oReqResp
 
-    well_known_content = fullfile.text.upper().strip().split('\n')
+def lDownloadUrlFps(domain, sCAfile, timeout=30, host='127.0.0.1', port=9050):
+    o = oDownloadUrl(domain, sCAfile, timeout=timeout, host=host, port=port)
+    well_known_content = o.text.upper().strip().split('\n')
     well_known_content = [i for i in well_known_content if i and len(i) == 40]
     return well_known_content