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Merge pull request #1037 from apprenticesakuya/master

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Finish .kinf2018 support and add KFX v2/v3 support
pull/1170/head
Apprentice Harper 4 years ago committed by GitHub
parent 2bb73584f2 22d2b37e04
commit 885ef5e890
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 125 additions and 25 deletions
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46
DeDRM_plugin/ion.py
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@ -1,6 +1,6 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Pascal implementation by lulzkabulz. Python translation by apprenticenaomi. DeDRM integration by anon.
# Pascal implementation by lulzkabulz. Python translation by apprenticenaomi. DeDRM integration by anon. VoucherEnvelope v2/v3 support by apprenticesakuya.
# BinaryIon.pas + DrmIon.pas + IonSymbols.pas
from __future__ import with_statement
@ -719,7 +719,8 @@ SYM_NAMES = [ 'com.amazon.drm.Envelope@1.0',
'com.amazon.drm.EnvelopeMetadata@2.0',
'com.amazon.drm.EncryptedPage@2.0',
'com.amazon.drm.PlainText@2.0', 'compression_algorithm',
'com.amazon.drm.Compressed@1.0', 'priority', 'refines']
'com.amazon.drm.Compressed@1.0', 'page_index_table',
'com.amazon.drm.VoucherEnvelope@2.0', 'com.amazon.drm.VoucherEnvelope@3.0' ]
def addprottable(ion):
ion.addtocatalog("ProtectedData", 1, SYM_NAMES)
@ -741,8 +742,42 @@ def pkcs7unpad(msg, blocklen):
return msg[:-paddinglen]
# every VoucherEnvelope version has a corresponding "word" and magic number, used in obfuscating the shared secret
VOUCHER_VERSION_INFOS = {
2: [b'Antidisestablishmentarianism', 5],
3: [b'Floccinaucinihilipilification', 8]
}
# obfuscate shared secret according to the VoucherEnvelope version
def obfuscate(secret, version):
if version == 1: # v1 does not use obfuscation
return secret
params = VOUCHER_VERSION_INFOS[version]
word = params[0]
magic = params[1]
# extend secret so that its length is divisible by the magic number
if len(secret) % magic != 0:
secret = secret + b'\x00' * (magic - len(secret) % magic)
secret = bytearray(secret)
obfuscated = bytearray(len(secret))
wordhash = bytearray(hashlib.sha256(word).digest())
# shuffle secret and xor it with the first half of the word hash
for i in range(0, len(secret)):
index = i // (len(secret) // magic) + magic * (i % (len(secret) // magic))
obfuscated[index] = secret[i] ^ wordhash[index % 16]
return obfuscated
class DrmIonVoucher(object):
envelope = None
version = None
voucher = None
drmkey = None
license_type = "Unknown"
@ -777,9 +812,9 @@ class DrmIonVoucher(object):
else:
_assert(False, "Unknown lock parameter: %s" % param)
sharedsecret = shared.encode("UTF-8")
sharedsecret = obfuscate(shared.encode('ASCII'), self.version)
key = hmac.new(sharedsecret, sharedsecret[:5], digestmod=hashlib.sha256).digest()
key = hmac.new(sharedsecret, "PIDv3", digestmod=hashlib.sha256).digest()
aes = AES.new(key[:32], AES.MODE_CBC, self.cipheriv[:16])
b = aes.decrypt(self.ciphertext)
b = pkcs7unpad(b, 16)
@ -814,8 +849,9 @@ class DrmIonVoucher(object):
def parse(self):
self.envelope.reset()
_assert(self.envelope.hasnext(), "Envelope is empty")
_assert(self.envelope.next() == TID_STRUCT and self.envelope.gettypename() == "com.amazon.drm.VoucherEnvelope@1.0",
_assert(self.envelope.next() == TID_STRUCT and str.startswith(self.envelope.gettypename(), "com.amazon.drm.VoucherEnvelope@"),
"Unknown type encountered in envelope, expected VoucherEnvelope")
self.version = int(self.envelope.gettypename().split('@')[1][:-2])
self.envelope.stepin()
while self.envelope.hasnext():

104
DeDRM_plugin/kindlekey.py
Unescape Escape View File

@ -4,7 +4,7 @@
from __future__ import with_statement
# kindlekey.py
# Copyright © 2008-2017 Apprentice Harper et al.
# Copyright © 2008-2020 Apprentice Harper et al.
__license__ = 'GPL v3'
__version__ = '2.6'
@ -29,6 +29,7 @@ __version__ = '2.6'
# 2.4 - Fix for complex Mac disk setups, thanks to Tibs
# 2.5 - Final Fix for Windows user names with non-ascii characters, thanks to oneofusoneofus
# 2.6 - Start adding support for Kindle 1.25+ .kinf2018 file
# 2.7 - Finish .kinf2018 support
"""
@ -36,7 +37,7 @@ Retrieve Kindle for PC/Mac user key.
"""
import sys, os, re
from struct import pack, unpack, unpack_from
from struct import pack, unpack
import json
import getopt
@ -207,7 +208,7 @@ if iswindows:
Original Version
Copyright (c) 2002 by Paul A. Lambert
Under:
CryptoPy Artisitic License Version 1.0
CryptoPy Artistic License Version 1.0
See the wonderful pure python package cryptopy-1.2.5
and read its LICENSE.txt for complete license details.
"""
@ -1050,7 +1051,7 @@ if iswindows:
DB = {}
with open(kInfoFile, 'rb') as infoReader:
data = infoReader.read()
# assume newest .kinf2011 style .kinf file
# assume .kinf2011 or .kinf2018 style .kinf file
# the .kinf file uses "/" to separate it into records
# so remove the trailing "/" to make it easy to use split
data = data[:-1]
@ -1064,8 +1065,17 @@ if iswindows:
# now extract the pieces that form the added entropy
pattern = re.compile(r'''\[Version:(\d+)\]\[Build:(\d+)\]\[Cksum:([^\]]+)\]\[Guid:([\{\}a-z0-9\-]+)\]''', re.IGNORECASE)
for m in re.finditer(pattern, cleartext):
added_entropy = m.group(2) + m.group(4)
version = int(m.group(1))
build = m.group(2)
guid = m.group(4)
if version == 5: # .kinf2011
added_entropy = build + guid
elif version == 6: # .kinf2018
salt = str(0x6d8 * int(build)) + guid
sp = GetUserName() + '+@#$%+' + GetIDString()
passwd = encode(SHA256(sp), charMap5)
key = KeyIVGen().pbkdf2(passwd, salt, 10000, 0x400)[:32] # this is very slow
# loop through the item records until all are processed
while len(items) > 0:
@ -1077,10 +1087,6 @@ if iswindows:
# is the MD5 hash of the key name encoded by charMap5
keyhash = item[0:32]
# the sha1 of raw keyhash string is used to create entropy along
# with the added entropy provided above from the headerblob
entropy = SHA1(keyhash) + added_entropy
# the remainder of the first record when decoded with charMap5
# has the ':' split char followed by the string representation
# of the number of records that follow
@ -1128,11 +1134,29 @@ if iswindows:
encdata = encdata + pfx
#print "rearranged data:",encdata
if version == 5:
# decode using new testMap8 to get the original CryptProtect Data
encryptedValue = decode(encdata,testMap8)
#print "decoded data:",encryptedValue.encode('hex')
entropy = SHA1(keyhash) + added_entropy
cleartext = CryptUnprotectData(encryptedValue, entropy, 1)
elif version == 6:
from Crypto.Cipher import AES
from Crypto.Util import Counter
# decode using new testMap8 to get IV + ciphertext
iv_ciphertext = decode(encdata, testMap8)
# pad IV so that we can substitute AES-CTR for GCM
iv = iv_ciphertext[:12] + b'\x00\x00\x00\x02'
ciphertext = iv_ciphertext[12:]
# convert IV to int for use with pycrypto
iv_ints = unpack('>QQ', iv)
iv = iv_ints[0] << 64 | iv_ints[1]
# set up AES-CTR
ctr = Counter.new(128, initial_value=iv)
cipher = AES.new(key, AES.MODE_CTR, counter=ctr)
# decrypt and decode
cleartext = decode(cipher.decrypt(ciphertext), charMap5)
# decode using new testMap8 to get the original CryptProtect Data
encryptedValue = decode(encdata,testMap8)
#print "decoded data:",encryptedValue.encode('hex')
cleartext = CryptUnprotectData(encryptedValue, entropy, 1)
if len(cleartext)>0:
#print "cleartext data:",cleartext,":end data"
DB[keyname] = cleartext
@ -1425,6 +1449,18 @@ elif isosx:
kInfoFiles=[]
found = False
home = os.getenv('HOME')
# check for .kinf2018 file in new location (App Store Kindle for Mac)
testpath = home + '/Library/Containers/com.amazon.Kindle/Data/Library/Application Support/Kindle/storage/.kinf2018'
if os.path.isfile(testpath):
kInfoFiles.append(testpath)
print('Found k4Mac kinf2018 file: ' + testpath)
found = True
# check for .kinf2018 files
testpath = home + '/Library/Application Support/Kindle/storage/.kinf2018'
if os.path.isfile(testpath):
kInfoFiles.append(testpath)
print('Found k4Mac kinf2018 file: ' + testpath)
found = True
# check for .kinf2011 file in new location (App Store Kindle for Mac)
testpath = home + '/Library/Containers/com.amazon.Kindle/Data/Library/Application Support/Kindle/storage/.kinf2011'
if os.path.isfile(testpath):
@ -1505,12 +1541,21 @@ elif isosx:
cleartext = UnprotectHeaderData(encryptedValue)
# now extract the pieces in the same way
# this version is different from K4PC it scales the build number by multipying by 735
pattern = re.compile(r'''\[Version:(\d+)\]\[Build:(\d+)\]\[Cksum:([^\]]+)\]\[Guid:([\{\}a-z0-9\-]+)\]''', re.IGNORECASE)
for m in re.finditer(pattern, cleartext):
entropy = str(int(m.group(2)) * 0x2df) + m.group(4)
version = int(m.group(1))
build = m.group(2)
guid = m.group(4)
cud = CryptUnprotectData(entropy,IDString)
if version == 5: # .kinf2011: identical to K4PC, except the build number gets multiplied
entropy = str(0x2df * int(build)) + guid
cud = CryptUnprotectData(entropy,IDString)
elif version == 6: # .kinf2018: identical to K4PC
salt = str(0x6d8 * int(build)) + guid
sp = GetUserName() + '+@#$%+' + IDString
passwd = encode(SHA256(sp), charMap5)
key = LibCrypto().keyivgen(passwd, salt, 10000, 0x400)[:32]
# loop through the item records until all are processed
while len(items) > 0:
@ -1571,9 +1616,28 @@ elif isosx:
encdata = encdata[noffset:]
encdata = encdata + pfx
# decode using testMap8 to get the CryptProtect Data
encryptedValue = decode(encdata,testMap8)
cleartext = cud.decrypt(encryptedValue)
if version == 5:
# decode using testMap8 to get the CryptProtect Data
encryptedValue = decode(encdata,testMap8)
cleartext = cud.decrypt(encryptedValue)
elif version == 6:
from Crypto.Cipher import AES
from Crypto.Util import Counter
# decode using new testMap8 to get IV + ciphertext
iv_ciphertext = decode(encdata, testMap8)
# pad IV so that we can substitute AES-CTR for GCM
iv = iv_ciphertext[:12] + b'\x00\x00\x00\x02'
ciphertext = iv_ciphertext[12:]
# convert IV to int for use with pycrypto
iv_ints = unpack('>QQ', iv)
iv = iv_ints[0] << 64 | iv_ints[1]
# set up AES-CTR
ctr = Counter.new(128, initial_value=iv)
cipher = AES.new(key, AES.MODE_CTR, counter=ctr)
# decrypt and decode
cleartext = decode(cipher.decrypt(ciphertext), charMap5)
# print keyname
# print cleartext
if len(cleartext) > 0:

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