powerdns-admin/app/lib/utils.py
thomasDOTde 12cb6f28fb implemented dynamic metadata lookup
removed saml json-templates
2017-11-01 17:31:51 +01:00

265 lines
9.2 KiB
Python

import re
import sys
import json
import requests
import urlparse
import hashlib
from app import app
from distutils.version import StrictVersion
from datetime import datetime,timedelta
from threading import Thread
from onelogin.saml2.auth import OneLogin_Saml2_Auth
from onelogin.saml2.utils import OneLogin_Saml2_Utils
from onelogin.saml2.settings import OneLogin_Saml2_Settings
from onelogin.saml2.idp_metadata_parser import OneLogin_Saml2_IdPMetadataParser
idp_timestamp = datetime(1970,1,1)
idp_data = None
if app.config['SAML_ENABLED']:
idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'])
if idp_data == None:
print('SAML: IDP Metadata initial load failed')
exit(-1)
idp_timestamp = datetime.now()
def get_idp_data():
global idp_data, idp_timestamp
lifetime = timedelta(minutes=app.config['SAML_METADATA_CACHE_LIFETIME'])
if idp_timestamp+lifetime < datetime.now():
background_thread = Thread(target=retreive_idp_data)
background_thread.start()
return idp_data
def retreive_idp_data():
global idp_data, idp_timestamp
new_idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'])
if new_idp_data != None:
idp_data = new_idp_data
idp_timestamp = datetime.now()
print("SAML: IDP Metadata successfully retreived from: " + app.config['SAML_METADATA_URL'])
else:
print("SAML: IDP Metadata could not be retreived")
if 'TIMEOUT' in app.config.keys():
TIMEOUT = app.config['TIMEOUT']
else:
TIMEOUT = 10
def auth_from_url(url):
auth = None
parsed_url = urlparse.urlparse(url).netloc
if '@' in parsed_url:
auth = parsed_url.split('@')[0].split(':')
auth = requests.auth.HTTPBasicAuth(auth[0], auth[1])
return auth
def fetch_remote(remote_url, method='GET', data=None, accept=None, params=None, timeout=None, headers=None):
if data is not None and type(data) != str:
data = json.dumps(data)
if timeout is None:
timeout = TIMEOUT
verify = False
our_headers = {
'user-agent': 'powerdnsadmin/0',
'pragma': 'no-cache',
'cache-control': 'no-cache'
}
if accept is not None:
our_headers['accept'] = accept
if headers is not None:
our_headers.update(headers)
r = requests.request(
method,
remote_url,
headers=headers,
verify=verify,
auth=auth_from_url(remote_url),
timeout=timeout,
data=data,
params=params
)
try:
if r.status_code not in (200, 400, 422):
r.raise_for_status()
except Exception as e:
raise RuntimeError("While fetching " + remote_url + ": " + str(e)), None, sys.exc_info()[2]
return r
def fetch_json(remote_url, method='GET', data=None, params=None, headers=None):
r = fetch_remote(remote_url, method=method, data=data, params=params, headers=headers, accept='application/json; q=1')
if method == "DELETE":
return True
if r.status_code == 204:
return {}
try:
assert('json' in r.headers['content-type'])
except Exception as e:
raise Exception("While fetching " + remote_url + ": " + str(e)), None, sys.exc_info()[2]
# don't use r.json here, as it will read from r.text, which will trigger
# content encoding auto-detection in almost all cases, WHICH IS EXTREMELY
# SLOOOOOOOOOOOOOOOOOOOOOOW. just don't.
data = None
try:
data = json.loads(r.content)
except UnicodeDecodeError:
data = json.loads(r.content, 'iso-8859-1')
return data
def display_record_name(data):
record_name, domain_name = data
if record_name == domain_name:
return '@'
else:
return record_name.replace('.'+domain_name, '')
def display_master_name(data):
"""
input data: "[u'127.0.0.1', u'8.8.8.8']"
"""
matches = re.findall(r'\'(.+?)\'', data)
return ", ".join(matches)
def display_time(amount, units='s', remove_seconds=True):
"""
Convert timestamp to normal time format
"""
amount = int(amount)
INTERVALS = [(lambda mlsec:divmod(mlsec, 1000), 'ms'),
(lambda seconds:divmod(seconds, 60), 's'),
(lambda minutes:divmod(minutes, 60), 'm'),
(lambda hours:divmod(hours, 24), 'h'),
(lambda days:divmod(days, 7), 'D'),
(lambda weeks:divmod(weeks, 4), 'W'),
(lambda years:divmod(years, 12), 'M'),
(lambda decades:divmod(decades, 10), 'Y')]
for index_start, (interval, unit) in enumerate(INTERVALS):
if unit == units:
break
amount_abrev = []
last_index = 0
amount_temp = amount
for index, (formula, abrev) in enumerate(INTERVALS[index_start: len(INTERVALS)]):
divmod_result = formula(amount_temp)
amount_temp = divmod_result[0]
amount_abrev.append((divmod_result[1], abrev))
if divmod_result[1] > 0:
last_index = index
amount_abrev_partial = amount_abrev[0: last_index + 1]
amount_abrev_partial.reverse()
final_string = ''
for amount, abrev in amount_abrev_partial:
final_string += str(amount) + abrev + ' '
if remove_seconds and 'm' in final_string:
final_string = final_string[:final_string.rfind(' ')]
return final_string[:final_string.rfind(' ')]
return final_string
def pdns_api_extended_uri(version):
"""
Check the pdns version
"""
if StrictVersion(version) >= StrictVersion('4.0.0'):
return "/api/v1"
else:
return ""
def email_to_gravatar_url(email, size=100):
"""
AD doesn't necessarily have email
"""
if not email:
email=""
hash_string = hashlib.md5(email).hexdigest()
return "https://s.gravatar.com/avatar/%s?s=%s" % (hash_string, size)
def prepare_flask_request(request):
# If server is behind proxys or balancers use the HTTP_X_FORWARDED fields
url_data = urlparse.urlparse(request.url)
return {
'https': 'on' if request.scheme == 'https' else 'off',
'http_host': request.host,
'server_port': url_data.port,
'script_name': request.path,
'get_data': request.args.copy(),
'post_data': request.form.copy(),
# Uncomment if using ADFS as IdP, https://github.com/onelogin/python-saml/pull/144
# 'lowercase_urlencoding': True,
'query_string': request.query_string
}
def init_saml_auth(req):
own_url = ''
if req['https'] == 'on':
own_url = 'https://'
else:
own_url = 'http://'
own_url += req['http_host']
metadata = get_idp_data()
settings = {}
settings['sp'] = {}
settings['sp']['NameIDFormat'] = idp_data['sp']['NameIDFormat']
settings['sp']['entityId'] = app.config['SAML_SP_ENTITY_ID']
settings['sp']['privateKey'] = ''
settings['sp']['x509cert'] = ''
settings['sp']['assertionConsumerService'] = {}
settings['sp']['assertionConsumerService']['binding'] = 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST'
settings['sp']['assertionConsumerService']['url'] = own_url+'/saml/authorized'
settings['sp']['attributeConsumingService'] = {}
settings['sp']['singleLogoutService'] = {}
settings['sp']['singleLogoutService']['binding'] = 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect'
settings['sp']['singleLogoutService']['url'] = own_url+'/saml/sls'
settings['idp'] = metadata['idp']
settings['strict'] = True
settings['debug'] = app.config['SAML_DEBUG']
settings['security'] = {}
settings['security']['digestAlgorithm'] = 'http://www.w3.org/2000/09/xmldsig#sha1'
settings['security']['metadataCacheDuration'] = None
settings['security']['metadataValidUntil'] = None
settings['security']['requestedAuthnContext'] = True
settings['security']['signatureAlgorithm'] = 'http://www.w3.org/2000/09/xmldsig#rsa-sha1'
settings['security']['wantAssertionsEncrypted'] = False
settings['security']['wantAttributeStatement'] = True
settings['security']['wantNameId'] = True
settings['security']['authnRequestsSigned'] = False
settings['security']['logoutRequestSigned'] = False
settings['security']['logoutResponseSigned'] = False
settings['security']['nameIdEncrypted'] = False
settings['security']['signMetadata'] = False
settings['security']['wantAssertionsSigned'] = True
settings['security']['wantMessagesSigned'] = True
settings['security']['wantNameIdEncrypted'] = False
settings['contactPerson'] = {}
settings['contactPerson']['support'] = {}
settings['contactPerson']['support']['emailAddress'] = app.config['SAML_SP_CONTACT_NAME']
settings['contactPerson']['support']['givenName'] = app.config['SAML_SP_CONTACT_MAIL']
settings['contactPerson']['technical'] = {}
settings['contactPerson']['technical']['emailAddress'] = app.config['SAML_SP_CONTACT_NAME']
settings['contactPerson']['technical']['givenName'] = app.config['SAML_SP_CONTACT_MAIL']
settings['organization'] = {}
settings['organization']['en-US'] = {}
settings['organization']['en-US']['displayname'] = 'PowerDNS-Admin'
settings['organization']['en-US']['name'] = 'PowerDNS-Admin'
settings['organization']['en-US']['url'] = own_url
auth = OneLogin_Saml2_Auth(req, settings)
return auth