DeDRM_tools/DeDRM_Macintosh_Application/DeDRM.app/Contents/Resources/android.py

157 lines
4.3 KiB
Python
Raw Normal View History

2013-10-03 00:59:40 +06:00
#!/usr/bin/env python
#fileencoding: utf-8
import os
import sys
import zlib
import tarfile
from hashlib import md5
from cStringIO import StringIO
from binascii import a2b_hex, b2a_hex
STORAGE = 'AmazonSecureStorage.xml'
class AndroidObfuscation(object):
'''AndroidObfuscation
For the key, it's written in java, and run in android dalvikvm
'''
key = a2b_hex('0176e04c9408b1702d90be333fd53523')
def encrypt(self, plaintext):
cipher = self._get_cipher()
padding = len(self.key) - len(plaintext) % len(self.key)
plaintext += chr(padding) * padding
return b2a_hex(cipher.encrypt(plaintext))
def decrypt(self, ciphertext):
cipher = self._get_cipher()
plaintext = cipher.decrypt(a2b_hex(ciphertext))
return plaintext[:-ord(plaintext[-1])]
def _get_cipher(self):
try:
from Crypto.Cipher import AES
return AES.new(self.key)
except ImportError:
from aescbc import AES, noPadding
return AES(self.key, padding=noPadding())
class AndroidObfuscationV2(AndroidObfuscation):
'''AndroidObfuscationV2
'''
count = 503
password = 'Thomsun was here!'
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):
try :
from Crypto.Cipher import DES
return DES.new(self.key, DES.MODE_CBC, self.iv)
except ImportError:
from python_des import Des, CBC
return Des(self.key, CBC, self.iv)
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_serials(path=None):
''' get serials from android's shared preference xml '''
if path is None:
if not os.path.isfile(STORAGE):
if os.path.isfile("backup.ab"):
get_storage()
else:
return []
path = STORAGE
if not os.path.isfile(path):
return []
storage = parse_preference(path)
salt = storage.get('AmazonSaltKey')
if salt and len(salt) == 16:
sys.stdout.write('Using AndroidObfuscationV2\n')
obfuscation = AndroidObfuscationV2(a2b_hex(salt))
else:
sys.stdout.write('Using AndroidObfuscation\n')
obfuscation = AndroidObfuscation()
def get_value(key):
encrypted_key = obfuscation.encrypt(key)
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:
return [dsnid]
serials = []
for token in tokens:
if token:
serials.append('%s%s' % (dsnid, token))
serials.append(dsnid)
for token in tokens:
if token:
serials.append(token)
return serials
def get_storage(path='backup.ab'):
'''get AmazonSecureStorage.xml from android backup.ab
backup.ab can be get using adb command:
shell> adb backup com.amazon.kindle
'''
output = None
read = open(path, 'rb')
head = read.read(24)
if head == 'ANDROID BACKUP\n1\n1\nnone\n':
output = StringIO(zlib.decompress(read.read()))
read.close()
if not output:
return False
tar = tarfile.open(fileobj=output)
for member in tar.getmembers():
if member.name.strip().endswith(STORAGE):
write = open(STORAGE, 'w')
write.write(tar.extractfile(member).read())
write.close()
break
return True
__all__ = [ 'get_storage', 'get_serials', 'parse_preference',
'AndroidObfuscation', 'AndroidObfuscationV2', 'STORAGE']
if __name__ == '__main__':
print get_serials()