312 lines
11 KiB
Python
312 lines
11 KiB
Python
import re
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import json
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import requests
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import hashlib
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import ipaddress
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from app import app
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from distutils.version import StrictVersion
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from urllib.parse import urlparse
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from datetime import datetime, timedelta
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from threading import Thread
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from .certutil import KEY_FILE, CERT_FILE
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import logging as logger
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logging = logger.getLogger(__name__)
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if app.config['SAML_ENABLED']:
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from onelogin.saml2.auth import OneLogin_Saml2_Auth
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from onelogin.saml2.idp_metadata_parser import OneLogin_Saml2_IdPMetadataParser
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idp_timestamp = datetime(1970, 1, 1)
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idp_data = None
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if 'SAML_IDP_ENTITY_ID' in app.config:
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idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'], entity_id=app.config.get('SAML_IDP_ENTITY_ID', None), required_sso_binding=app.config['SAML_IDP_SSO_BINDING'])
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else:
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idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'], entity_id=app.config.get('SAML_IDP_ENTITY_ID', None))
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if idp_data is None:
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print('SAML: IDP Metadata initial load failed')
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exit(-1)
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idp_timestamp = datetime.now()
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def get_idp_data():
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global idp_data, idp_timestamp
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lifetime = timedelta(minutes=app.config['SAML_METADATA_CACHE_LIFETIME'])
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if idp_timestamp+lifetime < datetime.now():
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background_thread = Thread(target=retrieve_idp_data)
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background_thread.start()
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return idp_data
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def retrieve_idp_data():
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global idp_data, idp_timestamp
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if 'SAML_IDP_SSO_BINDING' in app.config:
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new_idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'], entity_id=app.config.get('SAML_IDP_ENTITY_ID', None), required_sso_binding=app.config['SAML_IDP_SSO_BINDING'])
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else:
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new_idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'], entity_id=app.config.get('SAML_IDP_ENTITY_ID', None))
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if new_idp_data is not None:
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idp_data = new_idp_data
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idp_timestamp = datetime.now()
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print("SAML: IDP Metadata successfully retrieved from: " + app.config['SAML_METADATA_URL'])
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else:
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print("SAML: IDP Metadata could not be retrieved")
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if 'TIMEOUT' in app.config.keys():
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TIMEOUT = app.config['TIMEOUT']
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else:
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TIMEOUT = 10
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def auth_from_url(url):
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auth = None
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parsed_url = urlparse(url).netloc
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if '@' in parsed_url:
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auth = parsed_url.split('@')[0].split(':')
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auth = requests.auth.HTTPBasicAuth(auth[0], auth[1])
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return auth
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def fetch_remote(remote_url, method='GET', data=None, accept=None, params=None, timeout=None, headers=None):
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if data is not None and type(data) != str:
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data = json.dumps(data)
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if timeout is None:
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timeout = TIMEOUT
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verify = False
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our_headers = {
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'user-agent': 'powerdnsadmin/0',
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'pragma': 'no-cache',
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'cache-control': 'no-cache'
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}
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if accept is not None:
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our_headers['accept'] = accept
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if headers is not None:
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our_headers.update(headers)
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r = requests.request(
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method,
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remote_url,
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headers=headers,
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verify=verify,
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auth=auth_from_url(remote_url),
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timeout=timeout,
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data=data,
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params=params
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)
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try:
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if r.status_code not in (200, 201, 204, 400, 422):
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r.raise_for_status()
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except Exception as e:
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msg = "Returned status {0} and content {1}"
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logging.error(msg.format(r.status_code, r.content))
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raise RuntimeError('Error while fetching {0}'.format(remote_url))
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return r
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def fetch_json(remote_url, method='GET', data=None, params=None, headers=None):
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r = fetch_remote(remote_url, method=method, data=data, params=params, headers=headers,
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accept='application/json; q=1')
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if method == "DELETE":
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return True
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if r.status_code == 204:
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return {}
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try:
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assert('json' in r.headers['content-type'])
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except Exception as e:
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raise RuntimeError('Error while fetching {0}'.format(remote_url)) from e
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# don't use r.json here, as it will read from r.text, which will trigger
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# content encoding auto-detection in almost all cases, WHICH IS EXTREMELY
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# SLOOOOOOOOOOOOOOOOOOOOOOW. just don't.
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data = None
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try:
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data = json.loads(r.content.decode('utf-8'))
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except Exception as e:
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raise RuntimeError('Error while loading JSON data from {0}'.format(remote_url)) from e
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return data
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def display_record_name(data):
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record_name, domain_name = data
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if record_name == domain_name:
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return '@'
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else:
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return re.sub('\.{}$'.format(domain_name), '', record_name)
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def display_master_name(data):
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"""
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input data: "[u'127.0.0.1', u'8.8.8.8']"
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"""
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matches = re.findall(r'\'(.+?)\'', data)
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return ", ".join(matches)
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def display_time(amount, units='s', remove_seconds=True):
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"""
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Convert timestamp to normal time format
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"""
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amount = int(amount)
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INTERVALS = [(lambda mlsec:divmod(mlsec, 1000), 'ms'),
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(lambda seconds:divmod(seconds, 60), 's'),
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(lambda minutes:divmod(minutes, 60), 'm'),
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(lambda hours:divmod(hours, 24), 'h'),
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(lambda days:divmod(days, 7), 'D'),
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(lambda weeks:divmod(weeks, 4), 'W'),
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(lambda years:divmod(years, 12), 'M'),
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(lambda decades:divmod(decades, 10), 'Y')]
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for index_start, (interval, unit) in enumerate(INTERVALS):
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if unit == units:
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break
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amount_abrev = []
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last_index = 0
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amount_temp = amount
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for index, (formula, abrev) in enumerate(INTERVALS[index_start: len(INTERVALS)]):
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divmod_result = formula(amount_temp)
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amount_temp = divmod_result[0]
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amount_abrev.append((divmod_result[1], abrev))
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if divmod_result[1] > 0:
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last_index = index
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amount_abrev_partial = amount_abrev[0: last_index + 1]
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amount_abrev_partial.reverse()
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final_string = ''
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for amount, abrev in amount_abrev_partial:
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final_string += str(amount) + abrev + ' '
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if remove_seconds and 'm' in final_string:
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final_string = final_string[:final_string.rfind(' ')]
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return final_string[:final_string.rfind(' ')]
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return final_string
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def pdns_api_extended_uri(version):
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"""
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Check the pdns version
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"""
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if StrictVersion(version) >= StrictVersion('4.0.0'):
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return "/api/v1"
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else:
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return ""
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def email_to_gravatar_url(email="", size=100):
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"""
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AD doesn't necessarily have email
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"""
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if email is None:
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email = ""
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hash_string = hashlib.md5(email.encode('utf-8')).hexdigest()
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return "https://s.gravatar.com/avatar/{0}?s={1}".format(hash_string, size)
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def prepare_flask_request(request):
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# If server is behind proxys or balancers use the HTTP_X_FORWARDED fields
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url_data = urlparse(request.url)
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return {
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'https': 'on' if request.scheme == 'https' else 'off',
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'http_host': request.host,
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'server_port': url_data.port,
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'script_name': request.path,
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'get_data': request.args.copy(),
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'post_data': request.form.copy(),
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# Uncomment if using ADFS as IdP, https://github.com/onelogin/python-saml/pull/144
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'lowercase_urlencoding': True,
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'query_string': request.query_string
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}
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def init_saml_auth(req):
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own_url = ''
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if req['https'] == 'on':
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own_url = 'https://'
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else:
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own_url = 'http://'
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own_url += req['http_host']
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metadata = get_idp_data()
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settings = {}
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settings['sp'] = {}
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if 'SAML_NAMEID_FORMAT' in app.config:
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settings['sp']['NameIDFormat'] = app.config['SAML_NAMEID_FORMAT']
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else:
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settings['sp']['NameIDFormat'] = idp_data.get('sp', {}).get('NameIDFormat', 'urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified')
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settings['sp']['entityId'] = app.config['SAML_SP_ENTITY_ID']
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cert = open(CERT_FILE, "r").readlines()
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key = open(KEY_FILE, "r").readlines()
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settings['sp']['privateKey'] = "".join(key)
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settings['sp']['x509cert'] = "".join(cert)
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settings['sp']['assertionConsumerService'] = {}
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settings['sp']['assertionConsumerService']['binding'] = 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST'
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settings['sp']['assertionConsumerService']['url'] = own_url+'/saml/authorized'
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settings['sp']['attributeConsumingService'] = {}
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settings['sp']['singleLogoutService'] = {}
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settings['sp']['singleLogoutService']['binding'] = 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect'
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settings['sp']['singleLogoutService']['url'] = own_url+'/saml/sls'
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settings['idp'] = metadata['idp']
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settings['strict'] = True
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settings['debug'] = app.config['SAML_DEBUG']
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settings['security'] = {}
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settings['security']['digestAlgorithm'] = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256'
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settings['security']['metadataCacheDuration'] = None
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settings['security']['metadataValidUntil'] = None
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settings['security']['requestedAuthnContext'] = True
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settings['security']['signatureAlgorithm'] = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256'
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settings['security']['wantAssertionsEncrypted'] = False
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settings['security']['wantAttributeStatement'] = True
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settings['security']['wantNameId'] = True
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settings['security']['authnRequestsSigned'] = app.config['SAML_SIGN_REQUEST']
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settings['security']['logoutRequestSigned'] = app.config['SAML_SIGN_REQUEST']
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settings['security']['logoutResponseSigned'] = app.config['SAML_SIGN_REQUEST']
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settings['security']['nameIdEncrypted'] = False
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settings['security']['signMetadata'] = True
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settings['security']['wantAssertionsSigned'] = True
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settings['security']['wantMessagesSigned'] = True
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settings['security']['wantNameIdEncrypted'] = False
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settings['contactPerson'] = {}
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settings['contactPerson']['support'] = {}
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settings['contactPerson']['support']['emailAddress'] = app.config['SAML_SP_CONTACT_NAME']
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settings['contactPerson']['support']['givenName'] = app.config['SAML_SP_CONTACT_MAIL']
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settings['contactPerson']['technical'] = {}
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settings['contactPerson']['technical']['emailAddress'] = app.config['SAML_SP_CONTACT_NAME']
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settings['contactPerson']['technical']['givenName'] = app.config['SAML_SP_CONTACT_MAIL']
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settings['organization'] = {}
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settings['organization']['en-US'] = {}
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settings['organization']['en-US']['displayname'] = 'PowerDNS-Admin'
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settings['organization']['en-US']['name'] = 'PowerDNS-Admin'
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settings['organization']['en-US']['url'] = own_url
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auth = OneLogin_Saml2_Auth(req, settings)
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return auth
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def display_setting_state(value):
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if value == 1:
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return "ON"
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elif value == 0:
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return "OFF"
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else:
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return "UNKNOWN"
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def validate_ipaddress(address):
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try:
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ip = ipaddress.ip_address(address)
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except ValueError:
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pass
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else:
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if isinstance(ip, (ipaddress.IPv4Address, ipaddress.IPv6Address)):
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return [ip]
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return []
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