如何从SQL服务器解密密码？ [英] How to decrypt a password from SQL server?

问题描述

  select pwdencrypt（'AAAA'）
  

其中输出加密的AAAA字符串：

 
 0x0100CF465B7B12625EF019E157120D58DD46569AC7BF4118455D12625EF019E157120D58DD46569AC7BF4118455D 
 

如何转换（解密）其来源（这是AAAA）的输出？

解决方案

我相信pwdencrypt正在使用哈希，因此您无法真正反转散列字符串 - 算法设计为不可能。

如果您正在验证用户输入常规技术的密码是将其哈希，然后将其与数据库中的散列版本进行比较。

这是您如何验证被输入的表

  SELECT password_field FROM mytable WHERE password_field = pwdencrypt（userEnteredValue）
  

将userEnteredValue替换为（大惊喜）用户输入的值： p>

I have this query in sql server 2000:

select pwdencrypt('AAAA')

which outputs an encrypted string of 'AAAA':

0x0100CF465B7B12625EF019E157120D58DD46569AC7BF4118455D12625EF019E157120D58DD46569AC7BF4118455D

How can I convert (decrypt) the output from its origin (which is 'AAAA')?

解决方案

I believe pwdencrypt is using a hash so you cannot really reverse the hashed string - the algorithm is designed so it's impossible.

If you are verifying the password that a user entered the usual technique is to hash it and then compare it to the hashed version in the database.

This is how you could verify a usered entered table

SELECT password_field FROM mytable WHERE password_field=pwdencrypt(userEnteredValue)

Replace userEnteredValue with (big surprise) the value that the user entered :)

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