decrypt alexa android app map_data_storage_v2.db

decrypt.py

import base64
from Crypto import Random
from Crypto.Cipher import AES
import sqlite3
from pprint import pprint


def dict_factory(cursor, row):
    d = {}
    for idx, col in enumerate(cursor.description):
        d[col[0]] = row[idx]
    return d


class AESCipher(object):
    def __init__(self, key):
        self.bs = AES.block_size
        self.key = base64.b64decode(key)

    def decrypt(self, enc):
        iv = enc[: AES.block_size]
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return AESCipher._unpad(cipher.decrypt(enc[AES.block_size :])).decode("utf-8")

    @staticmethod
    def _unpad(s):
        return s[: -ord(s[len(s) - 1 :])]


con = sqlite3.connect("map_data_storage_v2.db")
con.row_factory = dict_factory
cur = con.cursor()

cur.execute("select * from encryption_data")
# fetch aes key
key = cur.fetchone()["encryption_data_value"].strip("\n")


cur.execute("select * from device_data")
cipher = AESCipher(key)
data = [
    data | {"device_data_value": cipher.decrypt(data["device_data_value"])}
    for data in cur.fetchall()
]
pprint(data)

cur.execute("select * from account_data")
cipher = AESCipher(key)
data = [
    data | {"account_data_value": cipher.decrypt(data["account_data_value"])}
    for data in cur.fetchall()
]
pprint(data)