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# -*- coding: utf-8 -*-
# _secrets/storage.py
# Copyright (C) 2016 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import json
import urlparse
from hashlib import sha256
from leap.soledad.common import SHARED_DB_NAME
from leap.soledad.common.log import getLogger
from leap.soledad.common.document import SoledadDocument
from leap.soledad.client.shared_db import SoledadSharedDatabase
from leap.soledad.client._secrets.util import emit
logger = getLogger(__name__)
class SecretsStorage(object):
def __init__(self, uuid, get_pass, url, local_path, creds, userid,
shared_db=None):
self._uuid = uuid
self._get_pass = get_pass
self._local_path = local_path
self._userid = userid
self._shared_db = shared_db or self._init_shared_db(url, creds)
self.__remote_doc = None
#
# properties
#
@property
def _user_data(self):
return {'uuid': self._uuid, 'userid': self._userid}
#
# local storage
#
def load_local(self):
logger.info("trying to load secrets from disk: %s" % self._local_path)
try:
with open(self._local_path, 'r') as f:
encrypted = json.loads(f.read())
logger.info("secrets loaded successfully from disk")
return encrypted
except IOError:
logger.warn("secrets not found in disk")
return None
def save_local(self, encrypted):
json_data = json.dumps(encrypted)
with open(self._local_path, 'w') as f:
f.write(json_data)
#
# remote storage
#
def _init_shared_db(self, url, creds):
url = urlparse.urljoin(url, SHARED_DB_NAME)
db = SoledadSharedDatabase.open_database(
url, self._uuid, creds=creds)
self._shared_db = db
def _remote_doc_id(self):
passphrase = self._get_pass()
text = '%s%s' % (passphrase, self._uuid)
digest = sha256(text).hexdigest()
return digest
@property
def _remote_doc(self):
if not self.__remote_doc and self._shared_db:
doc = self._get_remote_doc()
self.__remote_doc = doc
return self.__remote_doc
@emit('downloading')
def _get_remote_doc(self):
logger.info('trying to load secrets from server...')
doc = self._shared_db.get_doc(self._remote_doc_id())
if doc:
logger.info('secrets loaded successfully from server')
else:
logger.warn('secrets not found in server')
return doc
def load_remote(self):
doc = self._remote_doc
if not doc:
return None
encrypted = doc.content
return encrypted
@emit('uploading')
def save_remote(self, encrypted):
doc = self._remote_doc
if not doc:
doc = SoledadDocument(doc_id=self._remote_doc_id())
doc.content = encrypted
db = self._shared_db
if not db:
logger.warn('no shared db found')
return
db.put_doc(doc)
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