diff options
Diffstat (limited to 'client/src')
| -rw-r--r-- | client/src/leap/soledad/client/__init__.py | 824 | ||||
| -rw-r--r-- | client/src/leap/soledad/client/api.py | 822 | ||||
| -rw-r--r-- | client/src/leap/soledad/client/mp_safe_db_TOREMOVE.py (renamed from client/src/leap/soledad/client/mp_safe_db.py) | 0 | ||||
| -rw-r--r-- | client/src/leap/soledad/client/sqlcipher.py | 323 | ||||
| -rw-r--r-- | client/src/leap/soledad/client/sync.py | 4 |
5 files changed, 995 insertions, 978 deletions
diff --git a/client/src/leap/soledad/client/__init__.py b/client/src/leap/soledad/client/__init__.py index 50fcff2c..245a8971 100644 --- a/client/src/leap/soledad/client/__init__.py +++ b/client/src/leap/soledad/client/__init__.py @@ -16,828 +16,12 @@ # along with this program. If not, see <http://www.gnu.org/licenses/>. """ Soledad - Synchronization Of Locally Encrypted Data Among Devices. - -Soledad is the part of LEAP that manages storage and synchronization of -application data. It is built on top of U1DB reference Python API and -implements (1) a SQLCipher backend for local storage in the client, (2) a -SyncTarget that encrypts data before syncing, and (3) a CouchDB backend for -remote storage in the server side. -""" -import binascii -import errno -import httplib -import logging -import os -import socket -import ssl -import urlparse - - -try: - import cchardet as chardet -except ImportError: - import chardet - -from u1db.remote import http_client -from u1db.remote.ssl_match_hostname import match_hostname - -from leap.common.config import get_path_prefix -from leap.soledad.common import ( - SHARED_DB_NAME, - soledad_assert, - soledad_assert_type -) -from leap.soledad.client.events import ( - SOLEDAD_NEW_DATA_TO_SYNC, - SOLEDAD_DONE_DATA_SYNC, - signal, -) -from leap.soledad.common.document import SoledadDocument -from leap.soledad.client.crypto import SoledadCrypto -from leap.soledad.client.secrets import SoledadSecrets -from leap.soledad.client.shared_db import SoledadSharedDatabase -from leap.soledad.client.sqlcipher import open as sqlcipher_open -from leap.soledad.client.sqlcipher import SQLCipherDatabase -from leap.soledad.client.target import SoledadSyncTarget - - -logger = logging.getLogger(name=__name__) - - -# -# Constants -# - -SOLEDAD_CERT = None """ -Path to the certificate file used to certify the SSL connection between -Soledad client and server. -""" - - -# -# Soledad: local encrypted storage and remote encrypted sync. -# - -class Soledad(object): - """ - Soledad provides encrypted data storage and sync. - - A Soledad instance is used to store and retrieve data in a local encrypted - database and synchronize this database with Soledad server. - - This class is also responsible for bootstrapping users' account by - creating cryptographic secrets and/or storing/fetching them on Soledad - server. - - Soledad uses C{leap.common.events} to signal events. The possible events - to be signaled are: - - SOLEDAD_CREATING_KEYS: emitted during bootstrap sequence when key - generation starts. - SOLEDAD_DONE_CREATING_KEYS: emitted during bootstrap sequence when key - generation finishes. - SOLEDAD_UPLOADING_KEYS: emitted during bootstrap sequence when soledad - starts sending keys to server. - SOLEDAD_DONE_UPLOADING_KEYS: emitted during bootstrap sequence when - soledad finishes sending keys to server. - SOLEDAD_DOWNLOADING_KEYS: emitted during bootstrap sequence when - soledad starts to retrieve keys from server. - SOLEDAD_DONE_DOWNLOADING_KEYS: emitted during bootstrap sequence when - soledad finishes downloading keys from server. - SOLEDAD_NEW_DATA_TO_SYNC: emitted upon call to C{need_sync()} when - there's indeed new data to be synchronized between local database - replica and server's replica. - SOLEDAD_DONE_DATA_SYNC: emitted inside C{sync()} method when it has - finished synchronizing with remote replica. - """ - - LOCAL_DATABASE_FILE_NAME = 'soledad.u1db' - """ - The name of the local SQLCipher U1DB database file. - """ - - STORAGE_SECRETS_FILE_NAME = "soledad.json" - """ - The name of the file where the storage secrets will be stored. - """ - - DEFAULT_PREFIX = os.path.join(get_path_prefix(), 'leap', 'soledad') - """ - Prefix for default values for path. - """ - - def __init__(self, uuid, passphrase, secrets_path, local_db_path, - server_url, cert_file, - auth_token=None, secret_id=None, defer_encryption=False): - """ - Initialize configuration, cryptographic keys and dbs. - - :param uuid: User's uuid. - :type uuid: str - - :param passphrase: The passphrase for locking and unlocking encryption - secrets for local and remote storage. - :type passphrase: unicode - - :param secrets_path: Path for storing encrypted key used for - symmetric encryption. - :type secrets_path: str - - :param local_db_path: Path for local encrypted storage db. - :type local_db_path: str - - :param server_url: URL for Soledad server. This is used either to sync - with the user's remote db and to interact with the - shared recovery database. - :type server_url: str - - :param cert_file: Path to the certificate of the ca used - to validate the SSL certificate used by the remote - soledad server. - :type cert_file: str - - :param auth_token: Authorization token for accessing remote databases. - :type auth_token: str - - :param secret_id: The id of the storage secret to be used. - :type secret_id: str - - :param defer_encryption: Whether to defer encryption/decryption of - documents, or do it inline while syncing. - :type defer_encryption: bool - - :raise BootstrapSequenceError: Raised when the secret generation and - storage on server sequence has failed - for some reason. - """ - # store config params - self._uuid = uuid - self._passphrase = passphrase - self._secrets_path = secrets_path - self._local_db_path = local_db_path - self._server_url = server_url - # configure SSL certificate - global SOLEDAD_CERT - SOLEDAD_CERT = cert_file - self._set_token(auth_token) - self._defer_encryption = defer_encryption - - self._init_config() - self._init_dirs() - - # init crypto variables - self._shared_db_instance = None - self._crypto = SoledadCrypto(self) - self._secrets = SoledadSecrets( - self._uuid, - self._passphrase, - self._secrets_path, - self._shared_db, - self._crypto, - secret_id=secret_id) - - # initiate bootstrap sequence - self._bootstrap() # might raise BootstrapSequenceError() - - def _init_config(self): - """ - Initialize configuration using default values for missing params. - """ - soledad_assert_type(self._passphrase, unicode) - # initialize secrets_path - if self._secrets_path is None: - self._secrets_path = os.path.join( - self.DEFAULT_PREFIX, self.STORAGE_SECRETS_FILE_NAME) - # initialize local_db_path - if self._local_db_path is None: - self._local_db_path = os.path.join( - self.DEFAULT_PREFIX, self.LOCAL_DATABASE_FILE_NAME) - # initialize server_url - soledad_assert( - self._server_url is not None, - 'Missing URL for Soledad server.') - - # - # initialization/destruction methods - # - - def _bootstrap(self): - """ - Bootstrap local Soledad instance. - - :raise BootstrapSequenceError: Raised when the secret generation and - storage on server sequence has failed for some reason. - """ - try: - self._secrets.bootstrap() - self._init_db() - except: - raise - - def _init_dirs(self): - """ - Create work directories. - - :raise OSError: in case file exists and is not a dir. - """ - paths = map( - lambda x: os.path.dirname(x), - [self._local_db_path, self._secrets_path]) - for path in paths: - try: - if not os.path.isdir(path): - logger.info('Creating directory: %s.' % path) - os.makedirs(path) - except OSError as exc: - if exc.errno == errno.EEXIST and os.path.isdir(path): - pass - else: - raise - - def _init_db(self): - """ - Initialize the U1DB SQLCipher database for local storage. - - Currently, Soledad uses the default SQLCipher cipher, i.e. - 'aes-256-cbc'. We use scrypt to derive a 256-bit encryption key and - uses the 'raw PRAGMA key' format to handle the key to SQLCipher. - """ - key = self._secrets.get_local_storage_key() - sync_db_key = self._secrets.get_sync_db_key() - self._db = sqlcipher_open( - self._local_db_path, - binascii.b2a_hex(key), # sqlcipher only accepts the hex version - create=True, - document_factory=SoledadDocument, - crypto=self._crypto, - raw_key=True, - defer_encryption=self._defer_encryption, - sync_db_key=binascii.b2a_hex(sync_db_key)) - - def close(self): - """ - Close underlying U1DB database. - """ - logger.debug("Closing soledad") - if hasattr(self, '_db') and isinstance( - self._db, - SQLCipherDatabase): - self._db.stop_sync() - self._db.close() - - @property - def _shared_db(self): - """ - Return an instance of the shared recovery database object. - - :return: The shared database. - :rtype: SoledadSharedDatabase - """ - if self._shared_db_instance is None: - self._shared_db_instance = SoledadSharedDatabase.open_database( - urlparse.urljoin(self.server_url, SHARED_DB_NAME), - self._uuid, - False, # db should exist at this point. - creds=self._creds) - return self._shared_db_instance - - # - # Document storage, retrieval and sync. - # - - def put_doc(self, doc): - """ - Update a document in the local encrypted database. - - ============================== WARNING ============================== - This method converts the document's contents to unicode in-place. This - means that after calling C{put_doc(doc)}, the contents of the - document, i.e. C{doc.content}, might be different from before the - call. - ============================== WARNING ============================== - - :param doc: the document to update - :type doc: SoledadDocument - - :return: the new revision identifier for the document - :rtype: str - """ - doc.content = self._convert_to_unicode(doc.content) - return self._db.put_doc(doc) - - def delete_doc(self, doc): - """ - Delete a document from the local encrypted database. - - :param doc: the document to delete - :type doc: SoledadDocument - - :return: the new revision identifier for the document - :rtype: str - """ - return self._db.delete_doc(doc) - - def get_doc(self, doc_id, include_deleted=False): - """ - Retrieve a document from the local encrypted database. - - :param doc_id: the unique document identifier - :type doc_id: str - :param include_deleted: if True, deleted documents will be - returned with empty content; otherwise asking - for a deleted document will return None - :type include_deleted: bool - - :return: the document object or None - :rtype: SoledadDocument - """ - return self._db.get_doc(doc_id, include_deleted=include_deleted) - - def get_docs(self, doc_ids, check_for_conflicts=True, - include_deleted=False): - """ - Get the content for many documents. - - :param doc_ids: a list of document identifiers - :type doc_ids: list - :param check_for_conflicts: if set False, then the conflict check will - be skipped, and 'None' will be returned instead of True/False - :type check_for_conflicts: bool - - :return: iterable giving the Document object for each document id - in matching doc_ids order. - :rtype: generator - """ - return self._db.get_docs( - doc_ids, check_for_conflicts=check_for_conflicts, - include_deleted=include_deleted) - - def get_all_docs(self, include_deleted=False): - """ - Get the JSON content for all documents in the database. - - :param include_deleted: If set to True, deleted documents will be - returned with empty content. Otherwise deleted - documents will not be included in the results. - :return: (generation, [Document]) - The current generation of the database, followed by a list of - all the documents in the database. - """ - return self._db.get_all_docs(include_deleted) - - def _convert_to_unicode(self, content): - """ - Converts content to unicode (or all the strings in content) - - NOTE: Even though this method supports any type, it will - currently ignore contents of lists, tuple or any other - iterable than dict. We don't need support for these at the - moment - - :param content: content to convert - :type content: object - - :rtype: object - """ - if isinstance(content, unicode): - return content - elif isinstance(content, str): - result = chardet.detect(content) - default = "utf-8" - encoding = result["encoding"] or default - try: - content = content.decode(encoding) - except UnicodeError as e: - logger.error("Unicode error: {0!r}. Using 'replace'".format(e)) - content = content.decode(encoding, 'replace') - return content - else: - if isinstance(content, dict): - for key in content.keys(): - content[key] = self._convert_to_unicode(content[key]) - return content - - def create_doc(self, content, doc_id=None): - """ - Create a new document in the local encrypted database. - - :param content: the contents of the new document - :type content: dict - :param doc_id: an optional identifier specifying the document id - :type doc_id: str - - :return: the new document - :rtype: SoledadDocument - """ - return self._db.create_doc( - self._convert_to_unicode(content), doc_id=doc_id) - - def create_doc_from_json(self, json, doc_id=None): - """ - Create a new document. - - You can optionally specify the document identifier, but the document - must not already exist. See 'put_doc' if you want to override an - existing document. - If the database specifies a maximum document size and the document - exceeds it, create will fail and raise a DocumentTooBig exception. - - :param json: The JSON document string - :type json: str - :param doc_id: An optional identifier specifying the document id. - :type doc_id: - :return: The new document - :rtype: SoledadDocument - """ - return self._db.create_doc_from_json(json, doc_id=doc_id) - - def create_index(self, index_name, *index_expressions): - """ - Create an named index, which can then be queried for future lookups. - Creating an index which already exists is not an error, and is cheap. - Creating an index which does not match the index_expressions of the - existing index is an error. - Creating an index will block until the expressions have been evaluated - and the index generated. - - :param index_name: A unique name which can be used as a key prefix - :type index_name: str - :param index_expressions: index expressions defining the index - information. - :type index_expressions: dict - - Examples: - - "fieldname", or "fieldname.subfieldname" to index alphabetically - sorted on the contents of a field. - - "number(fieldname, width)", "lower(fieldname)" - """ - if self._db: - return self._db.create_index( - index_name, *index_expressions) - - def delete_index(self, index_name): - """ - Remove a named index. - - :param index_name: The name of the index we are removing - :type index_name: str - """ - if self._db: - return self._db.delete_index(index_name) - - def list_indexes(self): - """ - List the definitions of all known indexes. - - :return: A list of [('index-name', ['field', 'field2'])] definitions. - :rtype: list - """ - if self._db: - return self._db.list_indexes() - - def get_from_index(self, index_name, *key_values): - """ - Return documents that match the keys supplied. - - You must supply exactly the same number of values as have been defined - in the index. It is possible to do a prefix match by using '*' to - indicate a wildcard match. You can only supply '*' to trailing entries, - (eg 'val', '*', '*' is allowed, but '*', 'val', 'val' is not.) - It is also possible to append a '*' to the last supplied value (eg - 'val*', '*', '*' or 'val', 'val*', '*', but not 'val*', 'val', '*') - - :param index_name: The index to query - :type index_name: str - :param key_values: values to match. eg, if you have - an index with 3 fields then you would have: - get_from_index(index_name, val1, val2, val3) - :type key_values: tuple - :return: List of [Document] - :rtype: list - """ - if self._db: - return self._db.get_from_index(index_name, *key_values) - - def get_count_from_index(self, index_name, *key_values): - """ - Return the count of the documents that match the keys and - values supplied. - - :param index_name: The index to query - :type index_name: str - :param key_values: values to match. eg, if you have - an index with 3 fields then you would have: - get_from_index(index_name, val1, val2, val3) - :type key_values: tuple - :return: count. - :rtype: int - """ - if self._db: - return self._db.get_count_from_index(index_name, *key_values) - - def get_range_from_index(self, index_name, start_value, end_value): - """ - Return documents that fall within the specified range. - - Both ends of the range are inclusive. For both start_value and - end_value, one must supply exactly the same number of values as have - been defined in the index, or pass None. In case of a single column - index, a string is accepted as an alternative for a tuple with a single - value. It is possible to do a prefix match by using '*' to indicate - a wildcard match. You can only supply '*' to trailing entries, (eg - 'val', '*', '*' is allowed, but '*', 'val', 'val' is not.) It is also - possible to append a '*' to the last supplied value (eg 'val*', '*', - '*' or 'val', 'val*', '*', but not 'val*', 'val', '*') - - :param index_name: The index to query - :type index_name: str - :param start_values: tuples of values that define the lower bound of - the range. eg, if you have an index with 3 fields then you would - have: (val1, val2, val3) - :type start_values: tuple - :param end_values: tuples of values that define the upper bound of the - range. eg, if you have an index with 3 fields then you would have: - (val1, val2, val3) - :type end_values: tuple - :return: List of [Document] - :rtype: list - """ - if self._db: - return self._db.get_range_from_index( - index_name, start_value, end_value) - - def get_index_keys(self, index_name): - """ - Return all keys under which documents are indexed in this index. - - :param index_name: The index to query - :type index_name: str - :return: [] A list of tuples of indexed keys. - :rtype: list - """ - if self._db: - return self._db.get_index_keys(index_name) - - def get_doc_conflicts(self, doc_id): - """ - Get the list of conflicts for the given document. - - :param doc_id: the document id - :type doc_id: str - - :return: a list of the document entries that are conflicted - :rtype: list - """ - if self._db: - return self._db.get_doc_conflicts(doc_id) - - def resolve_doc(self, doc, conflicted_doc_revs): - """ - Mark a document as no longer conflicted. - - :param doc: a document with the new content to be inserted. - :type doc: SoledadDocument - :param conflicted_doc_revs: a list of revisions that the new content - supersedes. - :type conflicted_doc_revs: list - """ - if self._db: - return self._db.resolve_doc(doc, conflicted_doc_revs) - - def sync(self, defer_decryption=True): - """ - Synchronize the local encrypted replica with a remote replica. - - This method blocks until a syncing lock is acquired, so there are no - attempts of concurrent syncs from the same client replica. - - :param url: the url of the target replica to sync with - :type url: str - - :param defer_decryption: Whether to defer the decryption process using - the intermediate database. If False, - decryption will be done inline. - :type defer_decryption: bool - - :return: The local generation before the synchronisation was - performed. - :rtype: str - """ - if self._db: - try: - local_gen = self._db.sync( - urlparse.urljoin(self.server_url, 'user-%s' % self._uuid), - creds=self._creds, autocreate=False, - defer_decryption=defer_decryption) - signal(SOLEDAD_DONE_DATA_SYNC, self._uuid) - return local_gen - except Exception as e: - logger.error("Soledad exception when syncing: %s" % str(e)) - - def stop_sync(self): - """ - Stop the current syncing process. - """ - if self._db: - self._db.stop_sync() - - def need_sync(self, url): - """ - Return if local db replica differs from remote url's replica. - - :param url: The remote replica to compare with local replica. - :type url: str - - :return: Whether remote replica and local replica differ. - :rtype: bool - """ - target = SoledadSyncTarget( - url, self._db._get_replica_uid(), creds=self._creds, - crypto=self._crypto) - info = target.get_sync_info(self._db._get_replica_uid()) - # compare source generation with target's last known source generation - if self._db._get_generation() != info[4]: - signal(SOLEDAD_NEW_DATA_TO_SYNC, self._uuid) - return True - return False - - @property - def syncing(self): - """ - Property, True if the syncer is syncing. - """ - return self._db.syncing - - def _set_token(self, token): - """ - Set the authentication token for remote database access. - - Build the credentials dictionary with the following format: - - self._{ - 'token': { - 'uuid': '<uuid>' - 'token': '<token>' - } - - :param token: The authentication token. - :type token: str - """ - self._creds = { - 'token': { - 'uuid': self._uuid, - 'token': token, - } - } - - def _get_token(self): - """ - Return current token from credentials dictionary. - """ - return self._creds['token']['token'] - - token = property(_get_token, _set_token, doc='The authentication Token.') - - # - # Setters/getters - # - - def _get_uuid(self): - return self._uuid - - uuid = property(_get_uuid, doc='The user uuid.') - - def get_secret_id(self): - return self._secrets.secret_id - - def set_secret_id(self, secret_id): - self._secrets.set_secret_id(secret_id) - - secret_id = property( - get_secret_id, - set_secret_id, - doc='The active secret id.') - - def _set_secrets_path(self, secrets_path): - self._secrets.secrets_path = secrets_path - - def _get_secrets_path(self): - return self._secrets.secrets_path - - secrets_path = property( - _get_secrets_path, - _set_secrets_path, - doc='The path for the file containing the encrypted symmetric secret.') - - def _get_local_db_path(self): - return self._local_db_path - - local_db_path = property( - _get_local_db_path, - doc='The path for the local database replica.') - - def _get_server_url(self): - return self._server_url - - server_url = property( - _get_server_url, - doc='The URL of the Soledad server.') - - @property - def storage_secret(self): - """ - Return the secret used for symmetric encryption. - """ - return self._secrets.storage_secret - - @property - def remote_storage_secret(self): - """ - Return the secret used for encryption of remotely stored data. - """ - return self._secrets.remote_storage_secret - - @property - def secrets(self): - return self._secrets - - @property - def passphrase(self): - return self._secrets.passphrase - - def change_passphrase(self, new_passphrase): - """ - Change the passphrase that encrypts the storage secret. - - :param new_passphrase: The new passphrase. - :type new_passphrase: unicode - - :raise NoStorageSecret: Raised if there's no storage secret available. - """ - self._secrets.change_passphrase(new_passphrase) - - -# ---------------------------------------------------------------------------- -# Monkey patching u1db to be able to provide a custom SSL cert -# ---------------------------------------------------------------------------- - -# We need a more reasonable timeout (in seconds) -SOLEDAD_TIMEOUT = 120 - - -class VerifiedHTTPSConnection(httplib.HTTPSConnection): - """ - HTTPSConnection verifying server side certificates. - """ - # derived from httplib.py - - def connect(self): - """ - Connect to a host on a given (SSL) port. - """ - try: - source = self.source_address - sock = socket.create_connection((self.host, self.port), - SOLEDAD_TIMEOUT, source) - except AttributeError: - # source_address was introduced in 2.7 - sock = socket.create_connection((self.host, self.port), - SOLEDAD_TIMEOUT) - if self._tunnel_host: - self.sock = sock - self._tunnel() - - highest_supported = ssl.PROTOCOL_SSLv23 - - try: - # needs python 2.7.9+ - # negotiate the best available version, - # but explicitely disabled bad ones. - ctx = ssl.SSLContext(highest_supported) - ctx.options |= ssl.OP_NO_SSLv2 - ctx.options |= ssl.OP_NO_SSLv3 - - ctx.load_verify_locations(cafile=SOLEDAD_CERT) - ctx.verify_mode = ssl.CERT_REQUIRED - self.sock = ctx.wrap_socket(sock) - - except AttributeError: - self.sock = ssl.wrap_socket( - sock, ca_certs=SOLEDAD_CERT, cert_reqs=ssl.CERT_REQUIRED, - ssl_version=highest_supported) - - match_hostname(self.sock.getpeercert(), self.host) - - -old__VerifiedHTTPSConnection = http_client._VerifiedHTTPSConnection -http_client._VerifiedHTTPSConnection = VerifiedHTTPSConnection - - -__all__ = ['soledad_assert', 'Soledad'] +from leap.soledad.client.api import Soledad +from leap.soledad.common import soledad_assert from ._version import get_versions __version__ = get_versions()['version'] del get_versions + +__all__ = ['soledad_assert', 'Soledad', '__version__'] diff --git a/client/src/leap/soledad/client/api.py b/client/src/leap/soledad/client/api.py new file mode 100644 index 00000000..bfb6c703 --- /dev/null +++ b/client/src/leap/soledad/client/api.py @@ -0,0 +1,822 @@ +# -*- coding: utf-8 -*- +# api.py +# Copyright (C) 2013, 2014 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/>. +""" +Soledad - Synchronization Of Locally Encrypted Data Among Devices. + +This module holds the public api for Soledad. + +Soledad is the part of LEAP that manages storage and synchronization of +application data. It is built on top of U1DB reference Python API and +implements (1) a SQLCipher backend for local storage in the client, (2) a +SyncTarget that encrypts data before syncing, and (3) a CouchDB backend for +remote storage in the server side. +""" +import binascii +import errno +import httplib +import logging +import os +import socket +import ssl +import urlparse + + +try: + import cchardet as chardet +except ImportError: + import chardet + +from u1db.remote import http_client +from u1db.remote.ssl_match_hostname import match_hostname + +from leap.common.config import get_path_prefix +from leap.soledad.common import SHARED_DB_NAME +from leap.soledad.common import soledad_assert +from leap.soledad.common import soledad_assert_type +from leap.soledad.common.document import SoledadDocument + +from leap.soledad.client import events as soledad_events +from leap.soledad.client.crypto import SoledadCrypto +from leap.soledad.client.secrets import SoledadSecrets +from leap.soledad.client.shared_db import SoledadSharedDatabase +from leap.soledad.client.sqlcipher import SQLCipherDatabase +from leap.soledad.client.target import SoledadSyncTarget +from leap.soledad.client.sqlcipher import SQLCipherDB, SQLCipherOptions + +logger = logging.getLogger(name=__name__) + +# +# Constants +# + +SOLEDAD_CERT = None +""" +Path to the certificate file used to certify the SSL connection between +Soledad client and server. +""" + + +# +# Soledad: local encrypted storage and remote encrypted sync. +# + +class Soledad(object): + """ + Soledad provides encrypted data storage and sync. + + A Soledad instance is used to store and retrieve data in a local encrypted + database and synchronize this database with Soledad server. + + This class is also responsible for bootstrapping users' account by + creating cryptographic secrets and/or storing/fetching them on Soledad + server. + + Soledad uses ``leap.common.events`` to signal events. The possible events + to be signaled are: + + SOLEDAD_CREATING_KEYS: emitted during bootstrap sequence when key + generation starts. + SOLEDAD_DONE_CREATING_KEYS: emitted during bootstrap sequence when key + generation finishes. + SOLEDAD_UPLOADING_KEYS: emitted during bootstrap sequence when soledad + starts sending keys to server. + SOLEDAD_DONE_UPLOADING_KEYS: emitted during bootstrap sequence when + soledad finishes sending keys to server. + SOLEDAD_DOWNLOADING_KEYS: emitted during bootstrap sequence when + soledad starts to retrieve keys from server. + SOLEDAD_DONE_DOWNLOADING_KEYS: emitted during bootstrap sequence when + soledad finishes downloading keys from server. + SOLEDAD_NEW_DATA_TO_SYNC: emitted upon call to C{need_sync()} when + there's indeed new data to be synchronized between local database + replica and server's replica. + SOLEDAD_DONE_DATA_SYNC: emitted inside C{sync()} method when it has + finished synchronizing with remote replica. + """ + + LOCAL_DATABASE_FILE_NAME = 'soledad.u1db' + """ + The name of the local SQLCipher U1DB database file. + """ + + STORAGE_SECRETS_FILE_NAME = "soledad.json" + """ + The name of the file where the storage secrets will be stored. + """ + + DEFAULT_PREFIX = os.path.join(get_path_prefix(), 'leap', 'soledad') + """ + Prefix for default values for path. + """ + + def __init__(self, uuid, passphrase, secrets_path, local_db_path, + server_url, cert_file, + auth_token=None, secret_id=None, defer_encryption=False): + """ + Initialize configuration, cryptographic keys and dbs. + + :param uuid: User's uuid. + :type uuid: str + + :param passphrase: The passphrase for locking and unlocking encryption + secrets for local and remote storage. + :type passphrase: unicode + + :param secrets_path: Path for storing encrypted key used for + symmetric encryption. + :type secrets_path: str + + :param local_db_path: Path for local encrypted storage db. + :type local_db_path: str + + :param server_url: URL for Soledad server. This is used either to sync + with the user's remote db and to interact with the + shared recovery database. + :type server_url: str + + :param cert_file: Path to the certificate of the ca used + to validate the SSL certificate used by the remote + soledad server. + :type cert_file: str + + :param auth_token: Authorization token for accessing remote databases. + :type auth_token: str + + :param secret_id: The id of the storage secret to be used. + :type secret_id: str + + :param defer_encryption: Whether to defer encryption/decryption of + documents, or do it inline while syncing. + :type defer_encryption: bool + + :raise BootstrapSequenceError: Raised when the secret generation and + storage on server sequence has failed + for some reason. + """ + # store config params + self._uuid = uuid + self._passphrase = passphrase + self._secrets_path = secrets_path + self._local_db_path = local_db_path + self._server_url = server_url + # configure SSL certificate + global SOLEDAD_CERT + SOLEDAD_CERT = cert_file + self._set_token(auth_token) + self._defer_encryption = defer_encryption + + self._init_config() + self._init_dirs() + + # init crypto variables + self._shared_db_instance = None + self._crypto = SoledadCrypto(self) + self._secrets = SoledadSecrets( + self._uuid, + self._passphrase, + self._secrets_path, + self._shared_db, + self._crypto, + secret_id=secret_id) + + # initiate bootstrap sequence + self._bootstrap() # might raise BootstrapSequenceError() + + def _init_config(self): + """ + Initialize configuration using default values for missing params. + """ + soledad_assert_type(self._passphrase, unicode) + # initialize secrets_path + if self._secrets_path is None: + self._secrets_path = os.path.join( + self.DEFAULT_PREFIX, self.STORAGE_SECRETS_FILE_NAME) + # initialize local_db_path + if self._local_db_path is None: + self._local_db_path = os.path.join( + self.DEFAULT_PREFIX, self.LOCAL_DATABASE_FILE_NAME) + # initialize server_url + soledad_assert( + self._server_url is not None, + 'Missing URL for Soledad server.') + + # + # initialization/destruction methods + # + + def _bootstrap(self): + """ + Bootstrap local Soledad instance. + + :raise BootstrapSequenceError: Raised when the secret generation and + storage on server sequence has failed for some reason. + """ + try: + self._secrets.bootstrap() + self._init_db() + except: + raise + + def _init_dirs(self): + """ + Create work directories. + + :raise OSError: in case file exists and is not a dir. + """ + paths = map( + lambda x: os.path.dirname(x), + [self._local_db_path, self._secrets_path]) + for path in paths: + try: + if not os.path.isdir(path): + logger.info('Creating directory: %s.' % path) + os.makedirs(path) + except OSError as exc: + if exc.errno == errno.EEXIST and os.path.isdir(path): + pass + else: + raise + + def _init_db(self): + """ + Initialize the U1DB SQLCipher database for local storage. + + Currently, Soledad uses the default SQLCipher cipher, i.e. + 'aes-256-cbc'. We use scrypt to derive a 256-bit encryption key and + uses the 'raw PRAGMA key' format to handle the key to SQLCipher. + """ + tohex = binascii.b2a_hex + # sqlcipher only accepts the hex version + key = tohex(self._secrets.get_local_storage_key()) + sync_db_key = tohex(self._secrets.get_sync_db_key()) + + opts = SQLCipherOptions( + self._local_db_path, key, + is_raw_key=True, + create=True, + defer_encryption=self._defer_encryption, + sync_db_key=sync_db_key, + crypto=self._crypto, # XXX add this + document_factory=SoledadDocument, + ) + self._db = SQLCipherDB(opts) + + def close(self): + """ + Close underlying U1DB database. + """ + logger.debug("Closing soledad") + if hasattr(self, '_db') and isinstance( + self._db, + SQLCipherDatabase): + self._db.stop_sync() + self._db.close() + + @property + def _shared_db(self): + """ + Return an instance of the shared recovery database object. + + :return: The shared database. + :rtype: SoledadSharedDatabase + """ + if self._shared_db_instance is None: + self._shared_db_instance = SoledadSharedDatabase.open_database( + urlparse.urljoin(self.server_url, SHARED_DB_NAME), + self._uuid, + False, # db should exist at this point. + creds=self._creds) + return self._shared_db_instance + + # + # Document storage, retrieval and sync. + # + + def put_doc(self, doc): + """ + Update a document in the local encrypted database. + + ============================== WARNING ============================== + This method converts the document's contents to unicode in-place. This + means that after calling C{put_doc(doc)}, the contents of the + document, i.e. C{doc.content}, might be different from before the + call. + ============================== WARNING ============================== + + :param doc: the document to update + :type doc: SoledadDocument + + :return: the new revision identifier for the document + :rtype: str + """ + doc.content = self._convert_to_unicode(doc.content) + return self._db.put_doc(doc) + + def delete_doc(self, doc): + """ + Delete a document from the local encrypted database. + + :param doc: the document to delete + :type doc: SoledadDocument + + :return: the new revision identifier for the document + :rtype: str + """ + return self._db.delete_doc(doc) + + def get_doc(self, doc_id, include_deleted=False): + """ + Retrieve a document from the local encrypted database. + + :param doc_id: the unique document identifier + :type doc_id: str + :param include_deleted: if True, deleted documents will be + returned with empty content; otherwise asking + for a deleted document will return None + :type include_deleted: bool + + :return: the document object or None + :rtype: SoledadDocument + """ + return self._db.get_doc(doc_id, include_deleted=include_deleted) + + def get_docs(self, doc_ids, check_for_conflicts=True, + include_deleted=False): + """ + Get the content for many documents. + + :param doc_ids: a list of document identifiers + :type doc_ids: list + :param check_for_conflicts: if set False, then the conflict check will + be skipped, and 'None' will be returned instead of True/False + :type check_for_conflicts: bool + + :return: iterable giving the Document object for each document id + in matching doc_ids order. + :rtype: generator + """ + return self._db.get_docs( + doc_ids, check_for_conflicts=check_for_conflicts, + include_deleted=include_deleted) + + def get_all_docs(self, include_deleted=False): + """ + Get the JSON content for all documents in the database. + + :param include_deleted: If set to True, deleted documents will be + returned with empty content. Otherwise deleted + documents will not be included in the results. + :return: (generation, [Document]) + The current generation of the database, followed by a list of + all the documents in the database. + """ + return self._db.get_all_docs(include_deleted) + + def _convert_to_unicode(self, content): + """ + Converts content to unicode (or all the strings in content) + + NOTE: Even though this method supports any type, it will + currently ignore contents of lists, tuple or any other + iterable than dict. We don't need support for these at the + moment + + :param content: content to convert + :type content: object + + :rtype: object + """ + if isinstance(content, unicode): + return content + elif isinstance(content, str): + result = chardet.detect(content) + default = "utf-8" + encoding = result["encoding"] or default + try: + content = content.decode(encoding) + except UnicodeError as e: + logger.error("Unicode error: {0!r}. Using 'replace'".format(e)) + content = content.decode(encoding, 'replace') + return content + else: + if isinstance(content, dict): + for key in content.keys(): + content[key] = self._convert_to_unicode(content[key]) + return content + + def create_doc(self, content, doc_id=None): + """ + Create a new document in the local encrypted database. + + :param content: the contents of the new document + :type content: dict + :param doc_id: an optional identifier specifying the document id + :type doc_id: str + + :return: the new document + :rtype: SoledadDocument + """ + return self._db.create_doc( + self._convert_to_unicode(content), doc_id=doc_id) + + def create_doc_from_json(self, json, doc_id=None): + """ + Create a new document. + + You can optionally specify the document identifier, but the document + must not already exist. See 'put_doc' if you want to override an + existing document. + If the database specifies a maximum document size and the document + exceeds it, create will fail and raise a DocumentTooBig exception. + + :param json: The JSON document string + :type json: str + :param doc_id: An optional identifier specifying the document id. + :type doc_id: + :return: The new document + :rtype: SoledadDocument + """ + return self._db.create_doc_from_json(json, doc_id=doc_id) + + def create_index(self, index_name, *index_expressions): + """ + Create an named index, which can then be queried for future lookups. + Creating an index which already exists is not an error, and is cheap. + Creating an index which does not match the index_expressions of the + existing index is an error. + Creating an index will block until the expressions have been evaluated + and the index generated. + + :param index_name: A unique name which can be used as a key prefix + :type index_name: str + :param index_expressions: index expressions defining the index + information. + :type index_expressions: dict + + Examples: + + "fieldname", or "fieldname.subfieldname" to index alphabetically + sorted on the contents of a field. + + "number(fieldname, width)", "lower(fieldname)" + """ + if self._db: + return self._db.create_index( + index_name, *index_expressions) + + def delete_index(self, index_name): + """ + Remove a named index. + + :param index_name: The name of the index we are removing + :type index_name: str + """ + if self._db: + return self._db.delete_index(index_name) + + def list_indexes(self): + """ + List the definitions of all known indexes. + + :return: A list of [('index-name', ['field', 'field2'])] definitions. + :rtype: list + """ + if self._db: + return self._db.list_indexes() + + def get_from_index(self, index_name, *key_values): + """ + Return documents that match the keys supplied. + + You must supply exactly the same number of values as have been defined + in the index. It is possible to do a prefix match by using '*' to + indicate a wildcard match. You can only supply '*' to trailing entries, + (eg 'val', '*', '*' is allowed, but '*', 'val', 'val' is not.) + It is also possible to append a '*' to the last supplied value (eg + 'val*', '*', '*' or 'val', 'val*', '*', but not 'val*', 'val', '*') + + :param index_name: The index to query + :type index_name: str + :param key_values: values to match. eg, if you have + an index with 3 fields then you would have: + get_from_index(index_name, val1, val2, val3) + :type key_values: tuple + :return: List of [Document] + :rtype: list + """ + if self._db: + return self._db.get_from_index(index_name, *key_values) + + def get_count_from_index(self, index_name, *key_values): + """ + Return the count of the documents that match the keys and + values supplied. + + :param index_name: The index to query + :type index_name: str + :param key_values: values to match. eg, if you have + an index with 3 fields then you would have: + get_from_index(index_name, val1, val2, val3) + :type key_values: tuple + :return: count. + :rtype: int + """ + if self._db: + return self._db.get_count_from_index(index_name, *key_values) + + def get_range_from_index(self, index_name, start_value, end_value): + """ + Return documents that fall within the specified range. + + Both ends of the range are inclusive. For both start_value and + end_value, one must supply exactly the same number of values as have + been defined in the index, or pass None. In case of a single column + index, a string is accepted as an alternative for a tuple with a single + value. It is possible to do a prefix match by using '*' to indicate + a wildcard match. You can only supply '*' to trailing entries, (eg + 'val', '*', '*' is allowed, but '*', 'val', 'val' is not.) It is also + possible to append a '*' to the last supplied value (eg 'val*', '*', + '*' or 'val', 'val*', '*', but not 'val*', 'val', '*') + + :param index_name: The index to query + :type index_name: str + :param start_values: tuples of values that define the lower bound of + the range. eg, if you have an index with 3 fields then you would + have: (val1, val2, val3) + :type start_values: tuple + :param end_values: tuples of values that define the upper bound of the + range. eg, if you have an index with 3 fields then you would have: + (val1, val2, val3) + :type end_values: tuple + :return: List of [Document] + :rtype: list + """ + if self._db: + return self._db.get_range_from_index( + index_name, start_value, end_value) + + def get_index_keys(self, index_name): + """ + Return all keys under which documents are indexed in this index. + + :param index_name: The index to query + :type index_name: str + :return: [] A list of tuples of indexed keys. + :rtype: list + """ + if self._db: + return self._db.get_index_keys(index_name) + + def get_doc_conflicts(self, doc_id): + """ + Get the list of conflicts for the given document. + + :param doc_id: the document id + :type doc_id: str + + :return: a list of the document entries that are conflicted + :rtype: list + """ + if self._db: + return self._db.get_doc_conflicts(doc_id) + + def resolve_doc(self, doc, conflicted_doc_revs): + """ + Mark a document as no longer conflicted. + + :param doc: a document with the new content to be inserted. + :type doc: SoledadDocument + :param conflicted_doc_revs: a list of revisions that the new content + supersedes. + :type conflicted_doc_revs: list + """ + if self._db: + return self._db.resolve_doc(doc, conflicted_doc_revs) + + def sync(self, defer_decryption=True): + """ + Synchronize the local encrypted replica with a remote replica. + + This method blocks until a syncing lock is acquired, so there are no + attempts of concurrent syncs from the same client replica. + + :param url: the url of the target replica to sync with + :type url: str + + :param defer_decryption: Whether to defer the decryption process using + the intermediate database. If False, + decryption will be done inline. + :type defer_decryption: bool + + :return: The local generation before the synchronisation was + performed. + :rtype: str + """ + if self._db: + try: + local_gen = self._db.sync( + urlparse.urljoin(self.server_url, 'user-%s' % self._uuid), + creds=self._creds, autocreate=False, + defer_decryption=defer_decryption) + soledad_events.signal( + soledad_events.SOLEDAD_DONE_DATA_SYNC, self._uuid) + return local_gen + except Exception as e: + logger.error("Soledad exception when syncing: %s" % str(e)) + + def stop_sync(self): + """ + Stop the current syncing process. + """ + if self._db: + self._db.stop_sync() + + def need_sync(self, url): + """ + Return if local db replica differs from remote url's replica. + + :param url: The remote replica to compare with local replica. + :type url: str + + :return: Whether remote replica and local replica differ. + :rtype: bool + """ + target = SoledadSyncTarget( + url, self._db._get_replica_uid(), creds=self._creds, + crypto=self._crypto) + info = target.get_sync_info(self._db._get_replica_uid()) + # compare source generation with target's last known source generation + if self._db._get_generation() != info[4]: + soledad_events.signal( + soledad_events.SOLEDAD_NEW_DATA_TO_SYNC, self._uuid) + return True + return False + + @property + def syncing(self): + """ + Property, True if the syncer is syncing. + """ + return self._db.syncing + + def _set_token(self, token): + """ + Set the authentication token for remote database access. + + Build the credentials dictionary with the following format: + + self._{ + 'token': { + 'uuid': '<uuid>' + 'token': '<token>' + } + + :param token: The authentication token. + :type token: str + """ + self._creds = { + 'token': { + 'uuid': self._uuid, + 'token': token, + } + } + + def _get_token(self): + """ + Return current token from credentials dictionary. + """ + return self._creds['token']['token'] + + token = property(_get_token, _set_token, doc='The authentication Token.') + + # + # Setters/getters + # + + def _get_uuid(self): + return self._uuid + + uuid = property(_get_uuid, doc='The user uuid.') + + def get_secret_id(self): + return self._secrets.secret_id + + def set_secret_id(self, secret_id): + self._secrets.set_secret_id(secret_id) + + secret_id = property( + get_secret_id, + set_secret_id, + doc='The active secret id.') + + def _set_secrets_path(self, secrets_path): + self._secrets.secrets_path = secrets_path + + def _get_secrets_path(self): + return self._secrets.secrets_path + + secrets_path = property( + _get_secrets_path, + _set_secrets_path, + doc='The path for the file containing the encrypted symmetric secret.') + + def _get_local_db_path(self): + return self._local_db_path + + local_db_path = property( + _get_local_db_path, + doc='The path for the local database replica.') + + def _get_server_url(self): + return self._server_url + + server_url = property( + _get_server_url, + doc='The URL of the Soledad server.') + + @property + def storage_secret(self): + """ + Return the secret used for symmetric encryption. + """ + return self._secrets.storage_secret + + @property + def remote_storage_secret(self): + """ + Return the secret used for encryption of remotely stored data. + """ + return self._secrets.remote_storage_secret + + @property + def secrets(self): + return self._secrets + + @property + def passphrase(self): + return self._secrets.passphrase + + def change_passphrase(self, new_passphrase): + """ + Change the passphrase that encrypts the storage secret. + + :param new_passphrase: The new passphrase. + :type new_passphrase: unicode + + :raise NoStorageSecret: Raised if there's no storage secret available. + """ + self._secrets.change_passphrase(new_passphrase) + + +# ---------------------------------------------------------------------------- +# Monkey patching u1db to be able to provide a custom SSL cert +# ---------------------------------------------------------------------------- + +# We need a more reasonable timeout (in seconds) +SOLEDAD_TIMEOUT = 120 + + +class VerifiedHTTPSConnection(httplib.HTTPSConnection): + """ + HTTPSConnection verifying server side certificates. + """ + # derived from httplib.py + + def connect(self): + """ + Connect to a host on a given (SSL) port. + """ + try: + source = self.source_address + sock = socket.create_connection((self.host, self.port), + SOLEDAD_TIMEOUT, source) + except AttributeError: + # source_address was introduced in 2.7 + sock = socket.create_connection((self.host, self.port), + SOLEDAD_TIMEOUT) + if self._tunnel_host: + self.sock = sock + self._tunnel() + + self.sock = ssl.wrap_socket(sock, + ca_certs=SOLEDAD_CERT, + cert_reqs=ssl.CERT_REQUIRED) + match_hostname(self.sock.getpeercert(), self.host) + + +old__VerifiedHTTPSConnection = http_client._VerifiedHTTPSConnection +http_client._VerifiedHTTPSConnection = VerifiedHTTPSConnection + diff --git a/client/src/leap/soledad/client/mp_safe_db.py b/client/src/leap/soledad/client/mp_safe_db_TOREMOVE.py index 9ed0bef4..9ed0bef4 100644 --- a/client/src/leap/soledad/client/mp_safe_db.py +++ b/client/src/leap/soledad/client/mp_safe_db_TOREMOVE.py diff --git a/client/src/leap/soledad/client/sqlcipher.py b/client/src/leap/soledad/client/sqlcipher.py index 613903f7..fcef592d 100644 --- a/client/src/leap/soledad/client/sqlcipher.py +++ b/client/src/leap/soledad/client/sqlcipher.py @@ -53,7 +53,7 @@ from contextlib import contextmanager from collections import defaultdict from httplib import CannotSendRequest -from pysqlcipher import dbapi2 +from pysqlcipher import dbapi2 as sqlcipher_dbapi2 from u1db.backends import sqlite_backend from u1db import errors as u1db_errors from taskthread import TimerTask @@ -71,7 +71,7 @@ from leap.soledad.common.document import SoledadDocument logger = logging.getLogger(__name__) # Monkey-patch u1db.backends.sqlite_backend with pysqlcipher.dbapi2 -sqlite_backend.dbapi2 = dbapi2 +sqlite_backend.dbapi2 = sqlcipher_dbapi2 # It seems that, as long as we are not using old sqlite versions, serialized # mode is enabled by default at compile time. So accessing db connections from @@ -91,11 +91,12 @@ SQLITE_CHECK_SAME_THREAD = False SQLITE_ISOLATION_LEVEL = None +# TODO accept cyrpto object too.... or pass it along.. class SQLCipherOptions(object): def __init__(self, path, key, create=True, is_raw_key=False, cipher='aes-256-cbc', kdf_iter=4000, cipher_page_size=1024, - document_factory=None, defer_encryption=False, - sync_db_key=None): + document_factory=None, + defer_encryption=False, sync_db_key=None): """ Options for the initialization of an SQLCipher database. @@ -140,39 +141,39 @@ class SQLCipherOptions(object): # XXX Use SQLCIpherOptions instead -def open(path, password, create=True, document_factory=None, crypto=None, - raw_key=False, cipher='aes-256-cbc', kdf_iter=4000, - cipher_page_size=1024, defer_encryption=False, sync_db_key=None): - """ - Open a database at the given location. - - *** IMPORTANT *** - - Don't forget to close the database after use by calling the close() - method otherwise some resources might not be freed and you may experience - several kinds of leakages. - - *** IMPORTANT *** - - Will raise u1db.errors.DatabaseDoesNotExist if create=False and the - database does not already exist. - - :return: An instance of Database. - :rtype SQLCipherDatabase - """ - args = (path, password) - kwargs = { - 'create': create, - 'document_factory': document_factory, - 'crypto': crypto, - 'raw_key': raw_key, - 'cipher': cipher, - 'kdf_iter': kdf_iter, - 'cipher_page_size': cipher_page_size, - 'defer_encryption': defer_encryption, - 'sync_db_key': sync_db_key} +#def open(path, password, create=True, document_factory=None, crypto=None, + #raw_key=False, cipher='aes-256-cbc', kdf_iter=4000, + #cipher_page_size=1024, defer_encryption=False, sync_db_key=None): + #""" + #Open a database at the given location. +# + #*** IMPORTANT *** +# + #Don't forget to close the database after use by calling the close() + #method otherwise some resources might not be freed and you may experience + #several kinds of leakages. +# + #*** IMPORTANT *** +# + #Will raise u1db.errors.DatabaseDoesNotExist if create=False and the + #database does not already exist. +# + #:return: An instance of Database. + #:rtype SQLCipherDatabase + #""" + #args = (path, password) + #kwargs = { + #'create': create, + #'document_factory': document_factory, + #'crypto': crypto, + #'raw_key': raw_key, + #'cipher': cipher, + #'kdf_iter': kdf_iter, + #'cipher_page_size': cipher_page_size, + #'defer_encryption': defer_encryption, + #'sync_db_key': sync_db_key} # XXX pass only a CryptoOptions object around - return SQLCipherDatabase.open_database(*args, **kwargs) + #return SQLCipherDatabase.open_database(*args, **kwargs) # @@ -216,9 +217,7 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): """ # XXX Use SQLCIpherOptions instead - def __init__(self, sqlcipher_file, password, document_factory=None, - crypto=None, raw_key=False, cipher='aes-256-cbc', - kdf_iter=4000, cipher_page_size=1024, sync_db_key=None): + def __init__(self, opts): """ Connect to an existing SQLCipher database, creating a new sqlcipher database file if needed. @@ -230,23 +229,28 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): experience several kinds of leakages. *** IMPORTANT *** + + :param opts: + :type opts: SQLCipherOptions """ # ensure the db is encrypted if the file already exists - if os.path.exists(sqlcipher_file): - # XXX pass only a CryptoOptions object around - self.assert_db_is_encrypted( - sqlcipher_file, password, raw_key, cipher, kdf_iter, - cipher_page_size) + if os.path.exists(opts.sqlcipher_file): + self.assert_db_is_encrypted(opts) # connect to the sqlcipher database + # XXX this lock should not be needed ----------------- + # u1db holds a mutex over sqlite internally for the initialization. with self.k_lock: - self._db_handle = dbapi2.connect( - sqlcipher_file, + self._db_handle = sqlcipher_dbapi2.connect( + + # TODO ----------------------------------------------- + # move the init to a single function + opts.sqlcipher_file, isolation_level=SQLITE_ISOLATION_LEVEL, check_same_thread=SQLITE_CHECK_SAME_THREAD) # set SQLCipher cryptographic parameters - # XXX allow optiona deferredChain here ? + # XXX allow optional deferredChain here ? pragmas.set_crypto_pragmas( self._db_handle, password, raw_key, cipher, kdf_iter, cipher_page_size) @@ -260,8 +264,11 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): self._real_replica_uid = None self._ensure_schema() - self._crypto = crypto + self._crypto = opts.crypto + + # TODO ------------------------------------------------ + # Move syncdb to another class ------------------------ # define sync-db attrs self._sqlcipher_file = sqlcipher_file self._sync_db_key = sync_db_key @@ -294,103 +301,122 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): # self._syncers = {'<url>': ('<auth_hash>', syncer), ...} self._syncers = {} - @classmethod - # XXX Use SQLCIpherOptions instead - def _open_database(cls, sqlcipher_file, password, document_factory=None, - crypto=None, raw_key=False, cipher='aes-256-cbc', - kdf_iter=4000, cipher_page_size=1024, - defer_encryption=False, sync_db_key=None): + def _extra_schema_init(self, c): """ - Open a SQLCipher database. + Add any extra fields, etc to the basic table definitions. - :return: The database object. - :rtype: SQLCipherDatabase + This method is called by u1db.backends.sqlite_backend._initialize() + method, which is executed when the database schema is created. Here, + we use it to include the "syncable" property for LeapDocuments. + + :param c: The cursor for querying the database. + :type c: dbapi2.cursor """ - cls.defer_encryption = defer_encryption - if not os.path.isfile(sqlcipher_file): - raise u1db_errors.DatabaseDoesNotExist() + c.execute( + 'ALTER TABLE document ' + 'ADD COLUMN syncable BOOL NOT NULL DEFAULT TRUE') + - tries = 2 + # TODO ---- rescue the fix for the windows case from here... + #@classmethod + # XXX Use SQLCIpherOptions instead + #def _open_database(cls, sqlcipher_file, password, document_factory=None, + #crypto=None, raw_key=False, cipher='aes-256-cbc', + #kdf_iter=4000, cipher_page_size=1024, + #defer_encryption=False, sync_db_key=None): + #""" + #Open a SQLCipher database. +# + #:return: The database object. + #:rtype: SQLCipherDatabase + #""" + #cls.defer_encryption = defer_encryption + #if not os.path.isfile(sqlcipher_file): + #raise u1db_errors.DatabaseDoesNotExist() +# + #tries = 2 # Note: There seems to be a bug in sqlite 3.5.9 (with python2.6) # where without re-opening the database on Windows, it # doesn't see the transaction that was just committed - while True: - - with cls.k_lock: - db_handle = dbapi2.connect( - sqlcipher_file, - check_same_thread=SQLITE_CHECK_SAME_THREAD) - - try: + #while True: +# + #with cls.k_lock: + #db_handle = dbapi2.connect( + #sqlcipher_file, + #check_same_thread=SQLITE_CHECK_SAME_THREAD) +# + #try: # set cryptographic params - +# # XXX pass only a CryptoOptions object around - pragmas.set_crypto_pragmas( - db_handle, password, raw_key, cipher, kdf_iter, - cipher_page_size) - c = db_handle.cursor() + #pragmas.set_crypto_pragmas( + #db_handle, password, raw_key, cipher, kdf_iter, + #cipher_page_size) + #c = db_handle.cursor() # XXX if we use it here, it should be public - v, err = cls._which_index_storage(c) - except Exception as exc: - logger.warning("ERROR OPENING DATABASE!") - logger.debug("error was: %r" % exc) - v, err = None, exc - finally: - db_handle.close() - if v is not None: - break + #v, err = cls._which_index_storage(c) + #except Exception as exc: + #logger.warning("ERROR OPENING DATABASE!") + #logger.debug("error was: %r" % exc) + #v, err = None, exc + #finally: + #db_handle.close() + #if v is not None: + #break # possibly another process is initializing it, wait for it to be # done - if tries == 0: - raise err # go for the richest error? - tries -= 1 - time.sleep(cls.WAIT_FOR_PARALLEL_INIT_HALF_INTERVAL) - return SQLCipherDatabase._sqlite_registry[v]( - sqlcipher_file, password, document_factory=document_factory, - crypto=crypto, raw_key=raw_key, cipher=cipher, kdf_iter=kdf_iter, - cipher_page_size=cipher_page_size, sync_db_key=sync_db_key) - - @classmethod - def open_database(cls, sqlcipher_file, password, create, - document_factory=None, crypto=None, raw_key=False, - cipher='aes-256-cbc', kdf_iter=4000, - cipher_page_size=1024, defer_encryption=False, - sync_db_key=None): + #if tries == 0: + #raise err # go for the richest error? + #tries -= 1 + #time.sleep(cls.WAIT_FOR_PARALLEL_INIT_HALF_INTERVAL) + #return SQLCipherDatabase._sqlite_registry[v]( + #sqlcipher_file, password, document_factory=document_factory, + #crypto=crypto, raw_key=raw_key, cipher=cipher, kdf_iter=kdf_iter, + #cipher_page_size=cipher_page_size, sync_db_key=sync_db_key) + + #@classmethod + #def open_database(cls, sqlcipher_file, password, create, + #document_factory=None, crypto=None, raw_key=False, + #cipher='aes-256-cbc', kdf_iter=4000, + #cipher_page_size=1024, defer_encryption=False, + #sync_db_key=None): # XXX pass only a CryptoOptions object around - """ - Open a SQLCipher database. - - *** IMPORTANT *** - - Don't forget to close the database after use by calling the close() - method otherwise some resources might not be freed and you may - experience several kinds of leakages. - - *** IMPORTANT *** - - :return: The database object. - :rtype: SQLCipherDatabase - """ - cls.defer_encryption = defer_encryption - args = sqlcipher_file, password - kwargs = { - 'crypto': crypto, - 'raw_key': raw_key, - 'cipher': cipher, - 'kdf_iter': kdf_iter, - 'cipher_page_size': cipher_page_size, - 'defer_encryption': defer_encryption, - 'sync_db_key': sync_db_key, - 'document_factory': document_factory, - } - try: - return cls._open_database(*args, **kwargs) - except u1db_errors.DatabaseDoesNotExist: - if not create: - raise - + #""" + #Open a SQLCipher database. +# + #*** IMPORTANT *** +# + #Don't forget to close the database after use by calling the close() + #method otherwise some resources might not be freed and you may + #experience several kinds of leakages. +# + #*** IMPORTANT *** +# + #:return: The database object. + #:rtype: SQLCipherDatabase + #""" + #cls.defer_encryption = defer_encryption + #args = sqlcipher_file, password + #kwargs = { + #'crypto': crypto, + #'raw_key': raw_key, + #'cipher': cipher, + #'kdf_iter': kdf_iter, + #'cipher_page_size': cipher_page_size, + #'defer_encryption': defer_encryption, + #'sync_db_key': sync_db_key, + #'document_factory': document_factory, + #} + #try: + #return cls._open_database(*args, **kwargs) + #except u1db_errors.DatabaseDoesNotExist: + #if not create: + #raise +# # XXX here we were missing sync_db_key, intentional? - return SQLCipherDatabase(*args, **kwargs) + #return SQLCipherDatabase(*args, **kwargs) + + # BEGIN SYNC FOO ---------------------------------------------------------- def sync(self, url, creds=None, autocreate=True, defer_decryption=True): """ @@ -471,7 +497,7 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): def _get_syncer(self, url, creds=None): """ - Get a synchronizer for C{url} using C{creds}. + Get a synchronizer for ``url`` using ``creds``. :param url: The url of the target replica to sync with. :type url: str @@ -504,20 +530,7 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): syncer.num_inserted = 0 return syncer - def _extra_schema_init(self, c): - """ - Add any extra fields, etc to the basic table definitions. - - This method is called by u1db.backends.sqlite_backend._initialize() - method, which is executed when the database schema is created. Here, - we use it to include the "syncable" property for LeapDocuments. - - :param c: The cursor for querying the database. - :type c: dbapi2.cursor - """ - c.execute( - 'ALTER TABLE document ' - 'ADD COLUMN syncable BOOL NOT NULL DEFAULT TRUE') + # END SYNC FOO ---------------------------------------------------------- def _init_sync_db(self): """ @@ -601,8 +614,7 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): :return: The new document revision. :rtype: str """ - doc_rev = sqlite_backend.SQLitePartialExpandDatabase.put_doc( - self, doc) + doc_rev = sqlite_backend.SQLitePartialExpandDatabase.put_doc(self, doc) if self.defer_encryption: self.sync_queue.put_nowait(doc) return doc_rev @@ -644,8 +656,7 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): self, doc_id, check_for_conflicts) if doc: c = self._db_handle.cursor() - c.execute('SELECT syncable FROM document ' - 'WHERE doc_id=?', + c.execute('SELECT syncable FROM document WHERE doc_id=?', (doc.doc_id,)) result = c.fetchone() doc.syncable = bool(result[0]) @@ -691,11 +702,11 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): # backend should raise a DatabaseError exception. sqlite_backend.SQLitePartialExpandDatabase(sqlcipher_file) raise DatabaseIsNotEncrypted() - except dbapi2.DatabaseError: + except sqlcipher_dbapi2.DatabaseError: # assert that we can access it using SQLCipher with the given # key with cls.k_lock: - db_handle = dbapi2.connect( + db_handle = sqlcipher_dbapi2.connect( sqlcipher_file, isolation_level=SQLITE_ISOLATION_LEVEL, check_same_thread=SQLITE_CHECK_SAME_THREAD) @@ -750,8 +761,8 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): )) try: c.execute(statement, tuple(args)) - except dbapi2.OperationalError, e: - raise dbapi2.OperationalError( + except sqlcipher_dbapi2.OperationalError, e: + raise sqlcipher_dbapi2.OperationalError( str(e) + '\nstatement: %s\nargs: %s\n' % (statement, args)) res = c.fetchall() return res[0][0] @@ -760,6 +771,8 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): """ Close db_handle and close syncer. """ + # TODO separate db from syncers -------------- + if logger is not None: # logger might be none if called from __del__ logger.debug("Sqlcipher backend: closing") # stop the sync watcher for deferred encryption @@ -780,6 +793,8 @@ class SQLCipherDatabase(sqlite_backend.SQLitePartialExpandDatabase): if self._db_handle is not None: self._db_handle.close() self._db_handle = None + + # --------------------------------------- # close the sync database if self._sync_db is not None: self._sync_db.close() diff --git a/client/src/leap/soledad/client/sync.py b/client/src/leap/soledad/client/sync.py index 0297c75c..a47afbb6 100644 --- a/client/src/leap/soledad/client/sync.py +++ b/client/src/leap/soledad/client/sync.py @@ -14,8 +14,6 @@ # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. - - """ Soledad synchronization utilities. @@ -27,8 +25,6 @@ Extend u1db Synchronizer with the ability to: * Be interrupted and recovered. """ - - import logging import traceback from threading import Lock |