from datetime import datetime, timedelta from threading import Thread from flask import current_app import json import os from ..lib.certutil import KEY_FILE, CERT_FILE, create_self_signed_cert from ..lib.utils import urlparse class SAML(object): def __init__(self): if current_app.config['SAML_ENABLED']: from onelogin.saml2.auth import OneLogin_Saml2_Auth from onelogin.saml2.idp_metadata_parser import OneLogin_Saml2_IdPMetadataParser self.idp_timestamp = datetime.now() self.OneLogin_Saml2_Auth = OneLogin_Saml2_Auth self.OneLogin_Saml2_IdPMetadataParser = OneLogin_Saml2_IdPMetadataParser self.idp_data = None if 'SAML_IDP_ENTITY_ID' in current_app.config: self.idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote( current_app.config['SAML_METADATA_URL'], entity_id=current_app.config.get('SAML_IDP_ENTITY_ID', None), required_sso_binding=current_app. config['SAML_IDP_SSO_BINDING']) else: self.idp_data = OneLogin_Saml2_IdPMetadataParser.parse_remote( current_app.config['SAML_METADATA_URL'], entity_id=current_app.config.get('SAML_IDP_ENTITY_ID', None)) if self.idp_data is None: current_app.logger.info( 'SAML: IDP Metadata initial load failed') exit(-1) def get_idp_data(self): lifetime = timedelta( minutes=current_app.config['SAML_METADATA_CACHE_LIFETIME']) if self.idp_timestamp + lifetime < datetime.now(): background_thread = Thread(target=self.retrieve_idp_data()) background_thread.start() return self.idp_data def retrieve_idp_data(self): if 'SAML_IDP_SSO_BINDING' in current_app.config: new_idp_data = self.OneLogin_Saml2_IdPMetadataParser.parse_remote( current_app.config['SAML_METADATA_URL'], entity_id=current_app.config.get('SAML_IDP_ENTITY_ID', None), required_sso_binding=current_app.config['SAML_IDP_SSO_BINDING'] ) else: new_idp_data = self.OneLogin_Saml2_IdPMetadataParser.parse_remote( current_app.config['SAML_METADATA_URL'], entity_id=current_app.config.get('SAML_IDP_ENTITY_ID', None)) if new_idp_data is not None: self.idp_data = new_idp_data self.idp_timestamp = datetime.now() current_app.logger.info( "SAML: IDP Metadata successfully retrieved from: " + current_app.config['SAML_METADATA_URL']) else: current_app.logger.info( "SAML: IDP Metadata could not be retrieved") def prepare_flask_request(self, 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(self, req): own_url = '' if req['https'] == 'on': own_url = 'https://' else: own_url = 'http://' own_url += req['http_host'] metadata = self.get_idp_data() settings = {} settings['sp'] = {} if 'SAML_NAMEID_FORMAT' in current_app.config: settings['sp']['NameIDFormat'] = current_app.config[ 'SAML_NAMEID_FORMAT'] else: settings['sp']['NameIDFormat'] = self.idp_data.get('sp', {}).get( 'NameIDFormat', 'urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified') settings['sp']['entityId'] = current_app.config['SAML_SP_ENTITY_ID'] if ('SAML_CERT_FILE' in current_app.config) and ('SAML_KEY_FILE' in current_app.config): saml_cert_file = current_app.config['SAML_CERT_FILE'] saml_key_file = current_app.config['SAML_KEY_FILE'] if os.path.isfile(saml_cert_file): cert = open(saml_cert_file, "r").readlines() settings['sp']['x509cert'] = "".join(cert) if os.path.isfile(saml_key_file): key = open(saml_key_file, "r").readlines() settings['sp']['privateKey'] = "".join(key) else: if (os.path.isfile(CERT_FILE)) and (os.path.isfile(KEY_FILE)): cert = open(CERT_FILE, "r").readlines() key = open(KEY_FILE, "r").readlines() else: create_self_signed_cert() cert = open(CERT_FILE, "r").readlines() key = open(KEY_FILE, "r").readlines() settings['sp']['x509cert'] = "".join(cert) settings['sp']['privateKey'] = "".join(key) if 'SAML_SP_REQUESTED_ATTRIBUTES' in current_app.config: saml_req_attr = json.loads(current_app.config['SAML_SP_REQUESTED_ATTRIBUTES']) settings['sp']['attributeConsumingService'] = { "serviceName": "PowerDNSAdmin", "serviceDescription": "PowerDNS-Admin - PowerDNS administration utility", "requestedAttributes": saml_req_attr } else: settings['sp']['attributeConsumingService'] = {} 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']['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'] = current_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'] = True settings['security']['wantAttributeStatement'] = True settings['security']['wantNameId'] = True settings['security']['authnRequestsSigned'] = current_app.config[ 'SAML_SIGN_REQUEST'] settings['security']['logoutRequestSigned'] = current_app.config[ 'SAML_SIGN_REQUEST'] settings['security']['logoutResponseSigned'] = current_app.config[ 'SAML_SIGN_REQUEST'] settings['security']['nameIdEncrypted'] = False settings['security']['signMetadata'] = True settings['security']['wantAssertionsSigned'] = True settings['security']['wantMessagesSigned'] = current_app.config.get( 'SAML_WANT_MESSAGE_SIGNED', True) settings['security']['wantNameIdEncrypted'] = False settings['contactPerson'] = {} settings['contactPerson']['support'] = {} settings['contactPerson']['support'][ 'emailAddress'] = current_app.config['SAML_SP_CONTACT_NAME'] settings['contactPerson']['support']['givenName'] = current_app.config[ 'SAML_SP_CONTACT_MAIL'] settings['contactPerson']['technical'] = {} settings['contactPerson']['technical'][ 'emailAddress'] = current_app.config['SAML_SP_CONTACT_MAIL'] settings['contactPerson']['technical'][ 'givenName'] = current_app.config['SAML_SP_CONTACT_NAME'] 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 = self.OneLogin_Saml2_Auth(req, settings) return auth