155 lines
6.1 KiB
Python
155 lines
6.1 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2015 Tarek Galal <tare2.galal@gmail.com>
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#
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# This file is part of Gajim-OMEMO plugin.
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#
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# The Gajim-OMEMO plugin is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by the Free
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# Software Foundation, either version 3 of the License, or (at your option) any
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# later version.
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#
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# Gajim-OMEMO is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# the Gajim-OMEMO plugin. If not, see <http://www.gnu.org/licenses/>.
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#
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from .db_helpers import user_version
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class SQLDatabase():
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""" SQL Database """
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def __init__(self, dbConn):
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"""
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:type dbConn: Connection
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"""
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self.dbConn = dbConn
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self.createDb()
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self.migrateDb()
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c = self.dbConn.cursor()
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c.execute("PRAGMA synchronous=NORMAL;")
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c.execute("PRAGMA journal_mode;")
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mode = c.fetchone()[0]
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# WAL is a persistent DB mode, dont override it if user has set it
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if mode != 'wal':
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c.execute("PRAGMA journal_mode=MEMORY;")
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self.dbConn.commit()
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def createDb(self):
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if user_version(self.dbConn) == 0:
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# Creates
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# IdentityKeyStore
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# PreKeyStore
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# SignedPreKeyStore
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# SessionStore
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# EncryptionStore
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create_tables = '''
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CREATE TABLE IF NOT EXISTS identities (
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_id INTEGER PRIMARY KEY AUTOINCREMENT, recipient_id TEXT,
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registration_id INTEGER, public_key BLOB, private_key BLOB,
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next_prekey_id INTEGER, timestamp INTEGER, trust INTEGER,
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shown INTEGER DEFAULT 0);
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CREATE UNIQUE INDEX IF NOT EXISTS
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public_key_index ON identities (public_key, recipient_id);
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CREATE TABLE IF NOT EXISTS prekeys(
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_id INTEGER PRIMARY KEY AUTOINCREMENT,
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prekey_id INTEGER UNIQUE, sent_to_server BOOLEAN,
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record BLOB);
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CREATE TABLE IF NOT EXISTS signed_prekeys (
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_id INTEGER PRIMARY KEY AUTOINCREMENT,
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prekey_id INTEGER UNIQUE,
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timestamp NUMERIC DEFAULT CURRENT_TIMESTAMP, record BLOB);
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CREATE TABLE IF NOT EXISTS sessions (
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_id INTEGER PRIMARY KEY AUTOINCREMENT,
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recipient_id TEXT, device_id INTEGER,
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record BLOB, timestamp INTEGER, active INTEGER DEFAULT 1,
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UNIQUE(recipient_id, device_id));
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CREATE TABLE IF NOT EXISTS encryption_state (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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jid TEXT UNIQUE,
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encryption INTEGER
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);
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'''
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create_db_sql = """
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BEGIN TRANSACTION;
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%s
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PRAGMA user_version=5;
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END TRANSACTION;
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""" % (create_tables)
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self.dbConn.executescript(create_db_sql)
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def migrateDb(self):
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""" Migrates the DB
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"""
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# Find all double entrys and delete them
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if user_version(self.dbConn) < 2:
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delete_dupes = """ DELETE FROM identities WHERE _id not in (
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SELECT MIN(_id)
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FROM identities
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GROUP BY
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recipient_id, public_key
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);
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"""
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self.dbConn.executescript(""" BEGIN TRANSACTION;
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%s
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PRAGMA user_version=2;
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END TRANSACTION;
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""" % (delete_dupes))
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if user_version(self.dbConn) < 3:
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# Create a UNIQUE INDEX so every public key/recipient_id tuple
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# can only be once in the db
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add_index = """ CREATE UNIQUE INDEX IF NOT EXISTS
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public_key_index
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ON identities (public_key, recipient_id);
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"""
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self.dbConn.executescript(""" BEGIN TRANSACTION;
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%s
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PRAGMA user_version=3;
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END TRANSACTION;
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""" % (add_index))
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if user_version(self.dbConn) < 4:
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# Adds column "active" to the sessions table
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add_active = """ ALTER TABLE sessions
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ADD COLUMN active INTEGER DEFAULT 1;
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"""
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self.dbConn.executescript(""" BEGIN TRANSACTION;
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%s
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PRAGMA user_version=4;
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END TRANSACTION;
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""" % (add_active))
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if user_version(self.dbConn) < 5:
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# Adds DEFAULT Timestamp
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add_timestamp = """
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DROP TABLE signed_prekeys;
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CREATE TABLE IF NOT EXISTS signed_prekeys (
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_id INTEGER PRIMARY KEY AUTOINCREMENT,
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prekey_id INTEGER UNIQUE,
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timestamp NUMERIC DEFAULT CURRENT_TIMESTAMP, record BLOB);
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ALTER TABLE identities ADD COLUMN shown INTEGER DEFAULT 0;
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UPDATE identities SET shown = 1;
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"""
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self.dbConn.executescript(""" BEGIN TRANSACTION;
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%s
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PRAGMA user_version=5;
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END TRANSACTION;
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""" % (add_timestamp))
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