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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 Red Hat, Inc.
#
# 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.
import base64
import hashlib
from keystone.common import sql
class Keys(sql.ModelBase, sql.DictBase):
__tablename__ = 'kds_keys'
attributes = ['id', 'name', 'key']
id = sql.Column(sql.String(64), primary_key=True)
name = sql.Column(sql.Text())
key = sql.Column(sql.JsonBlob())
extra = sql.Column(sql.JsonBlob())
class KDS(sql.Base):
def _id_from_name(self, name):
return hashlib.sha256(name).hexdigest()
@sql.handle_conflicts(type='kds_keys')
def set_shared_key(self, kds_id, key):
session = self.get_session()
#try to remove existing entry first if any
try:
with session.begin():
id = self._id_from_name(kds_id)
key_ref = session.query(Keys).filter_by(id=id).first()
session.delete(key_ref)
session.flush()
except Exception:
# if the entry does not exist we'll create it later
pass
with session.begin():
d = dict()
d['id'] = self._id_from_name(kds_id)
d['name'] = kds_id
d['key'] = {'key_v1': base64.b64encode(key)}
key_ref = Keys.from_dict(d)
session.add(key_ref)
session.flush()
def get_shared_key(self, kds_id):
session = self.get_session()
id = self._id_from_name(kds_id)
key_ref = session.query(Keys).filter_by(id=id).first()
if not key_ref:
return None
d = key_ref.to_dict()
return base64.b64decode(d['key']['key_v1'])
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