DeDRM_tools/DeDRM_plugin/androidkindlekey.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# androidkindlekey.py
# Copyright © 2010-22 by Thom, Apprentice Harper et al.
# Revision history:
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# 1.0 - AmazonSecureStorage.xml decryption to serial number
# 1.1 - map_data_storage.db decryption to serial number
# 1.2 - Changed to be callable from AppleScript by returning only serial number
# - and changed name to androidkindlekey.py
# - and added in unicode command line support
# 1.3 - added in TkInter interface, output to a file
# 1.4 - Fix some problems identified by Aldo Bleeker
2015-09-03 12:51:10 +06:00
# 1.5 - Fix another problem identified by Aldo Bleeker
# 2.0 - Python 3 compatibility
# 2.1 - Remove OpenSSL support; only support PyCryptodome
"""
Retrieve Kindle for Android Serial Number.
"""
__license__ = 'GPL v3'
__version__ = '2.1'
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import os
import sys
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import traceback
import getopt
import tempfile
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import zlib
import tarfile
from hashlib import md5
from io import BytesIO
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from binascii import a2b_hex, b2a_hex
try:
from Cryptodome.Cipher import AES, DES
except ImportError:
from Crypto.Cipher import AES, DES
# Routines common to Mac and PC
class DrmException(Exception):
pass
STORAGE = "backup.ab"
STORAGE1 = "AmazonSecureStorage.xml"
STORAGE2 = "map_data_storage.db"
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def unpad(data, padding=16):
if sys.version_info[0] == 2:
pad_len = ord(data[-1])
else:
pad_len = data[-1]
return data[:-pad_len]
def pad(data, padding_len=16):
padding_data_len = padding_len - (len(data) % padding_len)
plaintext = data + chr(padding_data_len) * padding_data_len
return plaintext
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class AndroidObfuscation(object):
'''AndroidObfuscation
For the key, it's written in java, and run in android dalvikvm
'''
key = a2b_hex('0176e04c9408b1702d90be333fd53523')
def _get_cipher(self):
return AES.new(self.key, AES.MODE_ECB)
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def encrypt(self, plaintext):
pt = pad(plaintext.encode('utf-8'), 16)
return b2a_hex(self._get_cipher().encrypt(pt))
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def decrypt(self, ciphertext):
ct = a2b_hex(ciphertext)
return unpad(self._get_cipher().decrypt(ct), 16)
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class AndroidObfuscationV2(AndroidObfuscation):
'''AndroidObfuscationV2
'''
count = 503
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password = b'Thomsun was here!'
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def __init__(self, salt):
key = self.password + salt
for _ in range(self.count):
key = md5(key).digest()
self.key = key[:8]
self.iv = key[8:16]
def _get_cipher(self):
return DES.new(self.key, DES.MODE_CBC, self.iv)
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def parse_preference(path):
''' parse android's shared preference xml '''
storage = {}
read = open(path)
for line in read:
line = line.strip()
# <string name="key">value</string>
if line.startswith('<string name="'):
index = line.find('"', 14)
key = line[14:index]
value = line[index+2:-9]
storage[key] = value
read.close()
return storage
def get_serials1(path=STORAGE1):
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''' get serials from android's shared preference xml '''
if not os.path.isfile(path):
return []
storage = parse_preference(path)
salt = storage.get('AmazonSaltKey')
if salt and len(salt) == 16:
obfuscation = AndroidObfuscationV2(a2b_hex(salt))
else:
obfuscation = AndroidObfuscation()
def get_value(key):
encrypted_key = obfuscation.encrypt(key)
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encrypted_value = storage.get(encrypted_key)
if encrypted_value:
return obfuscation.decrypt(encrypted_value)
return ''
# also see getK4Pids in kgenpids.py
try:
dsnid = get_value('DsnId')
except:
sys.stderr.write('cannot get DsnId\n')
return []
try:
tokens = set(get_value('kindle.account.tokens').split(','))
except:
sys.stderr.write('cannot get kindle account tokens\n')
return []
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serials = []
if dsnid:
serials.append(dsnid)
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for token in tokens:
if token:
serials.append('%s%s' % (dsnid, token))
serials.append(token)
return serials
def get_serials2(path=STORAGE2):
''' get serials from android's sql database '''
if not os.path.isfile(path):
return []
import sqlite3
connection = sqlite3.connect(path)
cursor = connection.cursor()
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cursor.execute('''select device_data_value from device_data where device_data_key like '%serial.number%' ''')
device_data_keys = cursor.fetchall()
dsns = []
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for device_data_row in device_data_keys:
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try:
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if device_data_row and device_data_row[0]:
if len(device_data_row[0]) > 0:
dsns.append(device_data_row[0])
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except:
print("Error getting one of the device serial name keys")
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traceback.print_exc()
pass
dsns = list(set(dsns))
cursor.execute('''select userdata_value from userdata where userdata_key like '%/%kindle.account.tokens%' ''')
userdata_keys = cursor.fetchall()
tokens = []
for userdata_row in userdata_keys:
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try:
if userdata_row and userdata_row[0]:
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if len(userdata_row[0]) > 0:
if ',' in userdata_row[0]:
splits = userdata_row[0].split(',')
for split in splits:
tokens.append(split)
tokens.append(userdata_row[0])
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except:
print("Error getting one of the account token keys")
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traceback.print_exc()
pass
tokens = list(set(tokens))
serials = []
for x in dsns:
serials.append(x)
for y in tokens:
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serials.append(y)
serials.append(x+y)
connection.close()
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return serials
def get_serials(path=STORAGE):
'''get serials from files in from android backup.ab
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backup.ab can be get using adb command:
shell> adb backup com.amazon.kindle
or from individual files if they're passed.
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'''
if not os.path.isfile(path):
return []
basename = os.path.basename(path)
if basename == STORAGE1:
return get_serials1(path)
elif basename == STORAGE2:
return get_serials2(path)
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output = None
try :
read = open(path, 'rb')
head = read.read(24)
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if head[:14] == b'ANDROID BACKUP':
output = BytesIO(zlib.decompress(read.read()))
except Exception:
pass
finally:
read.close()
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if not output:
return []
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serials = []
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tar = tarfile.open(fileobj=output)
for member in tar.getmembers():
if member.name.strip().endswith(STORAGE1):
write = tempfile.NamedTemporaryFile(mode='wb', delete=False)
write.write(tar.extractfile(member).read())
write.close()
write_path = os.path.abspath(write.name)
serials.extend(get_serials1(write_path))
os.remove(write_path)
elif member.name.strip().endswith(STORAGE2):
write = tempfile.NamedTemporaryFile(mode='wb', delete=False)
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write.write(tar.extractfile(member).read())
write.close()
write_path = os.path.abspath(write.name)
serials.extend(get_serials2(write_path))
os.remove(write_path)
return list(set(serials))
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__all__ = [ 'get_serials', 'getkey']
# procedure for CLI and GUI interfaces
# returns single or multiple keys (one per line) in the specified file
def getkey(outfile, inpath):
keys = get_serials(inpath)
if len(keys) > 0:
with open(outfile, 'w') as keyfileout:
for key in keys:
keyfileout.write(key)
keyfileout.write("\n")
return True
return False
def usage(progname):
print("Decrypts the serial number(s) of Kindle For Android from Android backup or file")
print("Get backup.ab file using adb backup com.amazon.kindle for Android 4.0+.")
print("Otherwise extract AmazonSecureStorage.xml from /data/data/com.amazon.kindle/shared_prefs/AmazonSecureStorage.xml")
print("Or map_data_storage.db from /data/data/com.amazon.kindle/databases/map_data_storage.db")
print("")
print("Usage:")
print(" {0:s} [-h] [-b <backup.ab>] [<outfile.k4a>]".format(progname))
def cli_main():
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argv=sys.argv
progname = os.path.basename(argv[0])
print("{0} v{1}\nCopyright © 2010-2020 Thom, Apprentice Harper et al.".format(progname,__version__))
try:
opts, args = getopt.getopt(argv[1:], "hb:")
except getopt.GetoptError as err:
usage(progname)
print("\nError in options or arguments: {0}".format(err.args[0]))
return 2
inpath = ""
for o, a in opts:
if o == "-h":
usage(progname)
return 0
if o == "-b":
inpath = a
if len(args) > 1:
usage(progname)
return 2
if len(args) == 1:
# save to the specified file or directory
outfile = args[0]
if not os.path.isabs(outfile):
outfile = os.path.join(os.path.dirname(argv[0]),outfile)
outfile = os.path.abspath(outfile)
if os.path.isdir(outfile):
outfile = os.path.join(os.path.dirname(argv[0]),"androidkindlekey.k4a")
else:
# save to the same directory as the script
outfile = os.path.join(os.path.dirname(argv[0]),"androidkindlekey.k4a")
# make sure the outpath is OK
outfile = os.path.realpath(os.path.normpath(outfile))
if not os.path.isfile(inpath):
usage(progname)
print("\n{0:s} file not found".format(inpath))
return 2
if getkey(outfile, inpath):
print("\nSaved Kindle for Android key to {0}".format(outfile))
else:
print("\nCould not retrieve Kindle for Android key.")
return 0
def gui_main():
try:
import tkinter
import tkinter.constants
import tkinter.messagebox
import tkinter.filedialog
except:
print("tkinter not installed")
return 0
class DecryptionDialog(tkinter.Frame):
def __init__(self, root):
tkinter.Frame.__init__(self, root, border=5)
self.status = tkinter.Label(self, text="Select backup.ab file")
self.status.pack(fill=tkinter.constants.X, expand=1)
body = tkinter.Frame(self)
body.pack(fill=tkinter.constants.X, expand=1)
sticky = tkinter.constants.E + tkinter.constants.W
body.grid_columnconfigure(1, weight=2)
tkinter.Label(body, text="Backup file").grid(row=0, column=0)
self.keypath = tkinter.Entry(body, width=40)
self.keypath.grid(row=0, column=1, sticky=sticky)
self.keypath.insert(2, "backup.ab")
button = tkinter.Button(body, text="...", command=self.get_keypath)
button.grid(row=0, column=2)
buttons = tkinter.Frame(self)
buttons.pack()
button2 = tkinter.Button(
buttons, text="Extract", width=10, command=self.generate)
button2.pack(side=tkinter.constants.LEFT)
tkinter.Frame(buttons, width=10).pack(side=tkinter.constants.LEFT)
button3 = tkinter.Button(
buttons, text="Quit", width=10, command=self.quit)
button3.pack(side=tkinter.constants.RIGHT)
def get_keypath(self):
keypath = tkinter.filedialog.askopenfilename(
parent=None, title="Select backup.ab file",
defaultextension=".ab",
filetypes=[('adb backup com.amazon.kindle', '.ab'),
('All Files', '.*')])
if keypath:
keypath = os.path.normpath(keypath)
self.keypath.delete(0, tkinter.constants.END)
self.keypath.insert(0, keypath)
return
def generate(self):
inpath = self.keypath.get()
self.status['text'] = "Getting key..."
try:
keys = get_serials(inpath)
keycount = 0
for key in keys:
while True:
keycount += 1
outfile = os.path.join(progpath,"kindlekey{0:d}.k4a".format(keycount))
if not os.path.exists(outfile):
break
with open(outfile, 'w') as keyfileout:
keyfileout.write(key)
success = True
tkinter.messagebox.showinfo(progname, "Key successfully retrieved to {0}".format(outfile))
except Exception as e:
self.status['text'] = "Error: {0}".format(e.args[0])
return
self.status['text'] = "Select backup.ab file"
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argv=sys.argv()
progpath, progname = os.path.split(argv[0])
root = tkinter.Tk()
root.title("Kindle for Android Key Extraction v.{0}".format(__version__))
root.resizable(True, False)
root.minsize(300, 0)
DecryptionDialog(root).pack(fill=tkinter.constants.X, expand=1)
root.mainloop()
return 0
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if __name__ == '__main__':
if len(sys.argv) > 1:
sys.exit(cli_main())
sys.exit(gui_main())