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PowerDNS-Admin/powerdnsadmin/lib/utils.py
Khanh Ngo 8ea00b9484
Refactoring the code 
- Use Flask blueprint
- Split model and views into smaller parts
- Bug fixes
- API adjustment
2019-12-02 10:32:03 +07:00

338 lines
12 KiB
Python
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import re
import json
import requests
import hashlib
import ipaddress
import os
# from app import app
from distutils.version import StrictVersion
from urllib.parse import urlparse
from datetime import datetime, timedelta
from threading import Thread
from .certutil import KEY_FILE, CERT_FILE
# import logging as logger
# logging = logger.getLogger(__name__)
# if app.config['SAML_ENABLED']:
# from onelogin.saml2.auth import OneLogin_Saml2_Auth
# from onelogin.saml2.idp_metadata_parser import OneLogin_Saml2_IdPMetadataParser
# idp_timestamp = datetime(1970, 1, 1)
# idp_data = None
# if 'SAML_IDP_ENTITY_ID' in app.config:
# 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'])
# else:
# idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'], entity_id=app.config.get('SAML_IDP_ENTITY_ID', None))
# if idp_data is 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=retrieve_idp_data)
# background_thread.start()
# return idp_data
# def retrieve_idp_data():
# global idp_data, idp_timestamp
# if 'SAML_IDP_SSO_BINDING' in app.config:
# 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'])
# else:
# new_idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote(app.config['SAML_METADATA_URL'], entity_id=app.config.get('SAML_IDP_ENTITY_ID', None))
# if new_idp_data is not None:
# idp_data = new_idp_data
# idp_timestamp = datetime.now()
# print("SAML: IDP Metadata successfully retrieved from: " + app.config['SAML_METADATA_URL'])
# else:
# print("SAML: IDP Metadata could not be retrieved")
def auth_from_url(url):
auth = None
parsed_url = 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)
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, 201, 204, 400, 409, 422):
r.raise_for_status()
except Exception as e:
msg = "Returned status {0} and content {1}"
raise RuntimeError('Error while fetching {0}'.format(remote_url))
return r
def fetch_json(remote_url, method='GET', data=None, params=None, headers=None, timeout=None):
r = fetch_remote(remote_url,
method=method,
data=data,
params=params,
headers=headers,
timeout=timeout,
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 RuntimeError(
'Error while fetching {0}'.format(remote_url)) from e
# 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.decode('utf-8'))
except Exception as e:
raise RuntimeError(
'Error while loading JSON data from {0}'.format(remote_url)) from e
return data
def display_record_name(data):
record_name, domain_name = data
if record_name == domain_name:
return '@'
else:
return re.sub('\.{}$'.format(domain_name), '', record_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 email is None:
email = ""
hash_string = hashlib.md5(email.encode('utf-8')).hexdigest()
return "https://s.gravatar.com/avatar/{0}?s={1}".format(hash_string, size)
def prepare_flask_request(request):
# If server is behind proxys or balancers use the HTTP_X_FORWARDED fields
url_data = 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'] = {}
if 'SAML_NAMEID_FORMAT' in app.config:
settings['sp']['NameIDFormat'] = app.config['SAML_NAMEID_FORMAT']
else:
settings['sp']['NameIDFormat'] = idp_data.get('sp', {}).get(
'NameIDFormat',
'urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified')
settings['sp']['entityId'] = app.config['SAML_SP_ENTITY_ID']
if os.path.isfile(CERT_FILE):
cert = open(CERT_FILE, "r").readlines()
settings['sp']['x509cert'] = "".join(cert)
if os.path.isfile(KEY_FILE):
key = open(KEY_FILE, "r").readlines()
settings['sp']['privateKey'] = "".join(key)
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/2001/04/xmldsig-more#rsa-sha256'
settings['security']['metadataCacheDuration'] = None
settings['security']['metadataValidUntil'] = None
settings['security']['requestedAuthnContext'] = True
settings['security'][
'signatureAlgorithm'] = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256'
settings['security']['wantAssertionsEncrypted'] = False
settings['security']['wantAttributeStatement'] = True
settings['security']['wantNameId'] = True
settings['security']['authnRequestsSigned'] = app.config[
'SAML_SIGN_REQUEST']
settings['security']['logoutRequestSigned'] = app.config[
'SAML_SIGN_REQUEST']
settings['security']['logoutResponseSigned'] = app.config[
'SAML_SIGN_REQUEST']
settings['security']['nameIdEncrypted'] = False
settings['security']['signMetadata'] = True
settings['security']['wantAssertionsSigned'] = True
settings['security']['wantMessagesSigned'] = app.config.get(
'SAML_WANT_MESSAGE_SIGNED', 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
def display_setting_state(value):
if value == 1:
return "ON"
elif value == 0:
return "OFF"
else:
return "UNKNOWN"
def validate_ipaddress(address):
try:
ip = ipaddress.ip_address(address)
except ValueError:
pass
else:
if isinstance(ip, (ipaddress.IPv4Address, ipaddress.IPv6Address)):
return [ip]
return []
class customBoxes:
boxes = {
"reverse": (" ", " "),
"ip6arpa": ("ip6", "%.ip6.arpa"),
"inaddrarpa": ("in-addr", "%.in-addr.arpa")
}
order = ["reverse", "ip6arpa", "inaddrarpa"]
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