我正在通过解密 MSGSTORE.DB.CRYPT5、新数据库 WHATSAPP 和窃取 WhatsApp 更新。
第一个链接的作者发布了一个解密器，它将 iv 设置aes_192_cbc为
iv = bytearray([0x1E,0x39,0xF3,0x69,0xE9,0xD,0xB3,0x3A,0xA7,0x3B,0x44,0x2B,0xBB,0xB6,0xB0,0xB9])
这是完整的解密器：
#!/usr/bin/python
"""
48bits presents:
8===============================================D~~~
WhatsApp msgstore crypt5 decryptor by grbnz0 and nullsub
8===============================================D~~~
"""
import sys
import hashlib
import StringIO
from M2Crypto import EVP
key = bytearray([141, 75, 21, 92, 201, 255, 129, 229, 203, 246, 250, 120, 25, 54, 106, 62, 198, 33, 166, 86, 65, 108, 215, 147])
iv = bytearray([0x1E,0x39,0xF3,0x69,0xE9,0xD,0xB3,0x3A,0xA7,0x3B,0x44,0x2B,0xBB,0xB6,0xB0,0xB9])
def decrypt(db,acc):
fh = file(db,'rb')
edb = fh.read()
fh.close()
m = hashlib.md5()
m.update(acc)
md5 = bytearray(m.digest())
for i in xrange(24): key[i] ^= md5[i&0xF]
cipher = EVP.Cipher('aes_192_cbc', key=key, iv=iv, op=0)
sys.stdout.write(cipher.update(edb))
sys.stdout.write(cipher.final())
if __name__ == '__main__':
if len(sys.argv) != 3:
print 'usage %s <db> <accountname> > decrypted.db' % sys.argv[0]
else:
decrypt(sys.argv[1],sys.argv[2])
我唯一想念的是 IV 是从哪里来的？我在 ida 快照上没有看到它：
