在SQL Server查詢中解密密碼

Question

CREATE ASYMMETRIC KEY Asym_EPassword 
WITH ALGORITHM = RSA_512 
ENCRYPTION BY PASSWORD = testdemo123 

我已經使用上面的加密非對稱密鑰加密了我的表的Password列。

現在我想我的解密查詢select內password列

任何人都可以建議如何做到這一點？

Answer 1

​​

SQLFiddle不要讓用戶創建非對稱密鑰，因此對於演示覆制/粘貼這對你自己的SSMS：

CREATE ASYMMETRIC KEY Asym_EPassword 
WITH ALGORITHM = RSA_512 
ENCRYPTION BY PASSWORD = 'testDemo123!' 

DECLARE @PlainText NVARCHAR(100) 
DECLARE @CipherText VARBINARY(MAX) 

SET @PlainText = 'AAAAA' 
SELECT @CipherText = EncryptByAsymKey(AsymKey_ID('Asym_EPassword'), @PlainText); 

SELECT @CipherText; 

SELECT CONVERT(NVARCHAR(100), DecryptByAsymKey(AsymKey_ID('Asym_EPassword'), @CipherText, N'testDemo123!'));