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OpenStack Study: oauth1.py

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# Copyright 2013 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.

from keystone import auth

from keystone.common import controller

from keystone.common import dependency

from keystone.contrib.oauth1 import core as oauth

from keystone.contrib.oauth1 import validator

from keystone import exception

from keystone.openstack.common.gettextutils import _

from keystone.openstack.common import log

from keystone.openstack.common import timeutils

LOG = log.getLogger(__name__)

@dependency.optional('oauth_api')

**** CubicPower OpenStack Study ****

class OAuth(auth.AuthMethodHandler):

method = 'oauth1'

**** CubicPower OpenStack Study ****

    def authenticate(self, context, auth_info, auth_context):

        """Turn a signed request with an access key into a keystone token."""

        if not self.oauth_api:

            raise exception.Unauthorized(_('%s not supported') % self.method)

        headers = context['headers']

        oauth_headers = oauth.get_oauth_headers(headers)

        access_token_id = oauth_headers.get('oauth_token')

        if not access_token_id:

            raise exception.ValidationError(

                attribute='oauth_token', target='request')

        acc_token = self.oauth_api.get_access_token(access_token_id)

        expires_at = acc_token['expires_at']

        if expires_at:

            now = timeutils.utcnow()

            expires = timeutils.normalize_time(

                timeutils.parse_isotime(expires_at))

            if now > expires:

                raise exception.Unauthorized(_('Access token is expired'))

        url = controller.V3Controller.base_url(context, context['path'])

        access_verifier = oauth.ResourceEndpoint(

            request_validator=validator.OAuthValidator(),

            token_generator=oauth.token_generator)

        result, request = access_verifier.validate_protected_resource_request(

            url,

            http_method='POST',

            body=context['query_string'],

            headers=headers,

            realms=None

        )

        if not result:

            msg = _('Could not validate the access token')

            raise exception.Unauthorized(msg)

        auth_context['user_id'] = acc_token['authorizing_user_id']

        auth_context['access_token_id'] = access_token_id

        auth_context['project_id'] = acc_token['project_id']