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# Copyright 2014 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""oAuthlib request validator."""
from oslo_log import log
import six
from keystone.common import dependency
from keystone.contrib.oauth1 import core as oauth1
from keystone import exception
METHOD_NAME = 'oauth_validator'
LOG = log.getLogger(__name__)
@dependency.requires('oauth_api')
class OAuthValidator(oauth1.RequestValidator):
# TODO(mhu) set as option probably?
@property
def enforce_ssl(self):
return False
@property
def safe_characters(self):
# oauth tokens are generated from a uuid hex value
return set("abcdef0123456789")
def _check_token(self, token):
# generic token verification when they're obtained from a uuid hex
return (set(token) <= self.safe_characters and
len(token) == 32)
def check_client_key(self, client_key):
return self._check_token(client_key)
def check_request_token(self, request_token):
return self._check_token(request_token)
def check_access_token(self, access_token):
return self._check_token(access_token)
def check_nonce(self, nonce):
# Assuming length is not a concern
return set(nonce) <= self.safe_characters
def check_verifier(self, verifier):
return (all(i in oauth1.VERIFIER_CHARS for i in verifier) and
len(verifier) == 8)
def get_client_secret(self, client_key, request):
client = self.oauth_api.get_consumer_with_secret(client_key)
return client['secret']
def get_request_token_secret(self, client_key, token, request):
token_ref = self.oauth_api.get_request_token(token)
return token_ref['request_secret']
def get_access_token_secret(self, client_key, token, request):
access_token = self.oauth_api.get_access_token(token)
return access_token['access_secret']
def get_default_realms(self, client_key, request):
# realms weren't implemented with the previous library
return []
def get_realms(self, token, request):
return []
def get_redirect_uri(self, token, request):
# OOB (out of band) is supposed to be the default value to use
return 'oob'
def get_rsa_key(self, client_key, request):
# HMAC signing is used, so return a dummy value
return ''
def invalidate_request_token(self, client_key, request_token, request):
# this method is invoked when an access token is generated out of a
# request token, to make sure that request token cannot be consumed
# anymore. This is done in the backend, so we do nothing here.
pass
def validate_client_key(self, client_key, request):
try:
return self.oauth_api.get_consumer(client_key) is not None
except exception.NotFound:
return False
def validate_request_token(self, client_key, token, request):
try:
return self.oauth_api.get_request_token(token) is not None
except exception.NotFound:
return False
def validate_access_token(self, client_key, token, request):
try:
return self.oauth_api.get_access_token(token) is not None
except exception.NotFound:
return False
def validate_timestamp_and_nonce(self,
client_key,
timestamp,
nonce,
request,
request_token=None,
access_token=None):
return True
def validate_redirect_uri(self, client_key, redirect_uri, request):
# we expect OOB, we don't really care
return True
def validate_requested_realms(self, client_key, realms, request):
# realms are not used
return True
def validate_realms(self,
client_key,
token,
request,
uri=None,
realms=None):
return True
def validate_verifier(self, client_key, token, verifier, request):
try:
req_token = self.oauth_api.get_request_token(token)
return req_token['verifier'] == verifier
except exception.NotFound:
return False
def verify_request_token(self, token, request):
# there aren't strong expectations on the request token format
return isinstance(token, six.string_types)
def verify_realms(self, token, realms, request):
return True
# The following save_XXX methods are called to create tokens. I chose to
# keep the original logic, but the comments below show how that could be
# implemented. The real implementation logic is in the backend.
def save_access_token(self, token, request):
pass
# token_duration = CONF.oauth1.request_token_duration
# request_token_id = request.client_key
# self.oauth_api.create_access_token(request_token_id,
# token_duration,
# token["oauth_token"],
# token["oauth_token_secret"])
def save_request_token(self, token, request):
pass
# project_id = request.headers.get('Requested-Project-Id')
# token_duration = CONF.oauth1.request_token_duration
# self.oauth_api.create_request_token(request.client_key,
# project_id,
# token_duration,
# token["oauth_token"],
# token["oauth_token_secret"])
def save_verifier(self, token, verifier, request):
# keep the old logic for this, as it is done in two steps and requires
# information that the request validator has no access to
pass
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