MSSQL数据加密解密代码

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复制代码代码如下:

OPEN SYMMETRIC KEY 命令关于 对称密钥加密使用证书解密 
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'password' 
go 
CREATE CERTIFICATE CertTest 
with SUBJECT = 'Test Certificate' 
GO 
--创建非对称密钥 
CREATE ASYMMETRIC KEY TestAsymmetric 
WITH ALGORITHM = RSA_2048 
ENCRYPTION BY PASSWORD = 'password1' ; 
GO 
ALTER ASYMMETRIC KEY TestAsymmetric WITH PRIVATE KEY (DECRYPTION BY PASSWORD = 'password1') 

--DROP ASYMMETRIC KEY TestAsymmetric 
--创建对称密钥 
CREATE SYMMETRIC KEY TestSymmetric 
WITH ALGORITHM = AES_256 
ENCRYPTION BY PASSWORD = 'password' ; 
GO 

OPEN SYMMETRIC KEY TestSymmetric 
DECRYPTION BY PASSWORD = 'password' ; 

go 
SELECT 

ENCRYPTBYASYMKEY(ASYMKEY_ID ('TestAsymmetric'), name) , 
CAST(deCRYPTBYASYMKEY (ASYMKEY_ID( 'TestAsymmetric'),ENCRYPTBYASYMKEY (ASYMKEY_ID( 'TestAsymmetric'),name ) ) 
as nvarchar(200 )), 
ENCRYPTBYCERT ( Cert_ID('CertTest' ),name), 
CAST(deCRYPTBYCERT (Cert_ID ('CertTest'), ENCRYPTBYCERT (Cert_ID( 'CertTest'),name )) 
as nvarchar (200)), 
EncryptByKey ( KEY_GUID('TestSymmetric' ),name), 
CAST(decryptByKey (EncryptByKey (KEY_GUID ('TestSymmetric'), name)) 
as nvarchar (200)) 

FROM sys .objects