secretsdump.py 文件源码

def __decryptHash(self, rid, cryptedHash, constant):
        # Section 2.2.11.1.1 Encrypting an NT or LM Hash Value with a Specified Key
        # plus hashedBootKey stuff
        Key1,Key2 = self.__cryptoCommon.deriveKey(rid)

        Crypt1 = DES.new(Key1, DES.MODE_ECB)
        Crypt2 = DES.new(Key2, DES.MODE_ECB)

        rc4Key = self.MD5( self.__hashedBootKey[:0x10] + pack("<L",rid) + constant )
        rc4 = ARC4.new(rc4Key)
        key = rc4.encrypt(cryptedHash)

        decryptedHash = Crypt1.decrypt(key[:8]) + Crypt2.decrypt(key[8:])

        return decryptedHash