在C＃中使用带有密钥的HMACSHA256对字符串进行解密 [英] Decryption of string using HMACSHA256 with key in C#

问题描述

我有一个加密的字符串（使用HMACSHA256用密钥编码）。现在我如何使用密钥和HMACSHA256算法对其进行解密？

I have an encrypted string (encoded with a key using HMACSHA256). Now how can I decrypt it back using the key and HMACSHA256 algorithm?

推荐答案

这个问题毫无意义。 这不是加密。并且您的字符串无法解密，因为没有加密。我不知道您称之为密钥，但您没有密钥。可能你只有基于哈希的消息认证码，只有HMAC值本身，它不包含你认为你加密的字符串。你没有。你从来没有提到你有加密数据。



请参阅：

http://en.wikipedia.org/wiki/Hash-based_message_authentication_code [ ^ ]，

https://msdn.microsoft.com/en-us/library/system.security.cryptography.hmacsha256%28v=vs.110%29.aspx [ ^ ]。



了解某些内容可以基于哈希以及加密哈希，请参阅：

http://en.wikipedia.org/wiki / Cryptographic_hash_func [ ^ ]，

另见 http://en.wikipedia.org/wiki/SHA-2 [ ^ ]。

-SA

The question make no sense at all. This is not encryption. And your string cannot be decrypted, because nothing was encrypted. I don't know what do you call a "key", but you don't have a key. Probably you have only the hash-based message authentication code, only HMAC value itself, which does not contains the string you thought you "encrypted". You did not. You never mentioned you had "encrypted data".

Please see:
http://en.wikipedia.org/wiki/Hash-based_message_authentication_code[^],
https://msdn.microsoft.com/en-us/library/system.security.cryptography.hmacsha256%28v=vs.110%29.aspx[^].

To understand how something can be hash-based and what cryptographic hash does, please see:
http://en.wikipedia.org/wiki/Cryptographic_hash_function[^],
see also http://en.wikipedia.org/wiki/SHA-2[^].

—SA

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