使用WinAPI CryptEncrypt的加密文件，Key存在但忘记了加密方法 [英] Encrypted file with WinAPI CryptEncrypt , the Key is exists but forgot the cryptography method

问题描述

i有一个旧的非托管DLL，来自VC ++编程的旧时代

现在我需要使用它再次，这个DLL使用一个许可文件，我用WinAPI cryptEncrypt / Decrypt函数设置加密，  i
记住密钥 ，但我不记得我使用过哪种加密方法！

遗憾的是，由于硬盘故障导致源代码丢失

现在我需要使用这个DLL并需要解密其许可证文件

你们有什么建议吗？

感谢高级

解决方案

b

感谢您的帖子。

>>我有一个旧的非托管DLL从VC ++编程的旧时代现在我需要再次使用它，这个dll使用了一个许可文件，我用WinAPI cryptEncrypt / Decrypt函数设置了它的加密，我记得密钥了，但是我不记得我用过的加密方法！... 



什么是"加密方法"是什么意思？

据我所知你可以使用密钥来解密文件，这是更多信息。

示例C程序：解密文件

CryptDeriveKey功能
$


祝福，祝你好运b $ b $
Jack Zh昂

i have an old unmanaged DLL from the old days of programming in VC++

now i need to use it again , this dll uses a license file which i set up its encryption with WinAPI cryptEncrypt/Decrypt functions , i remember the key , but i do not remember which cryptography method i've used !

unfortunately the source code is lost due to a HDD failure

now i need to use this DLL and need to decrypt its license file

do you guys have any suggestion ?

thanks in advanced

解决方案

Hi,

Thanks for post here.

>>i have an old unmanaged DLL from the old days of programming in VC++ now i need to use it again , this dll uses a license file which i set up its encryption with WinAPI cryptEncrypt/Decrypt functions , i remember the key , but i do not remember which cryptography method i've used !... 

What's the "cryptography method" means?
As far as I know you can use a key to decrypt a File, Here is more information.
Example C Program: Decrypting a File
CryptDeriveKey function

Best Wishes,

Jack Zhang

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