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# -*- coding: utf-8 -*-
from Crypto.Cipher import AES
import hashlib, hmac, ctypes
SQLITE_FILE_HEADER = bytes("SQLite format 3",encoding='ASCII') + bytes(1)#文件头
IV_SIZE = 16
HMAC_SHA1_SIZE = 20
KEY_SIZE = 32
DEFAULT_PAGESIZE = 4096 #4048数据 + 16IV + 20 HMAC + 12
DEFAULT_ITER = 64000
#yourkey
password = bytes.fromhex("0000".replace(' ',''))
with open(r'D:\Users\zixing\Documents\WeChat Files\yourname\Msg\ChatMsg.db', 'rb') as f:
blist = f.read()
print(len(blist))
salt = blist[:16]#微信将文件头换成了盐
key = hashlib.pbkdf2_hmac('sha1', password, salt, DEFAULT_ITER, KEY_SIZE)#获得Key
first = blist[16:DEFAULT_PAGESIZE]#丢掉salt
# import struct
mac_salt = bytes([x^0x3a for x in salt])
mac_key = hashlib.pbkdf2_hmac('sha1', key, mac_salt, 2, KEY_SIZE)
hash_mac = hmac.new(mac_key ,digestmod = 'sha1')#用第一页的Hash测试一下
hash_mac.update(first[:-32])
hash_mac.update(bytes(ctypes.c_int(1)))
# hash_mac.update(struct.pack('=I',1))
if (hash_mac.digest() == first[-32:-12]):
print('Correct Password')
else:
raise RuntimeError('Wrong Password')
blist = [blist[i:i+DEFAULT_PAGESIZE] for i in range(DEFAULT_PAGESIZE,len(blist),DEFAULT_PAGESIZE)]
with open(r'E:\ChatMsg.db', 'wb') as f:
f.write(SQLITE_FILE_HEADER)#写入文件头
t = AES.new(key ,AES.MODE_CBC ,first[-48:-32])
f.write(t.decrypt(first[:-48]))
f.write(first[-48:])
for i in blist:
t = AES.new(key ,AES.MODE_CBC ,i[-48:-32])
f.write(t.decrypt(i[:-48]))
f.write(i[-48:])
是这个吧？ 怎么改？ |
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发表于 2022-5-27 17:07
