在 SQL 中恢复加密备份

Question

我用这个代码

USE master;  
GO  
CREATE MASTER KEY ENCRYPTION BY PASSWORD = '1234';  
GO  
CREATE CERTIFICATE Cer
   WITH SUBJECT = 'Hello';  
   GO

然后用这段代码备份数据库

backup database Temp to disk = 'D:\Backup\temp.bak'
 WITH  
  COMPRESSION,  
  ENCRYPTION   
   (  
   ALGORITHM = AES_256,  
   SERVER CERTIFICATE = Cer
   ),
  STATS = 10

现在我无法将它恢复到另一台服务器我在另一台服务器上创建了这个主密钥，但它不起作用

Answer 1

master key用于保护certificate用于备份加密。 certificate 是唯一的 - 为执行 CREATE CERTIFICATE 语句指定相同的名称会创建不同的证书。

如果这不是真的，每个有权访问您的备份的人都可以解密它。

因此，您需要导出证书：

-- Backup the certificate
BACKUP CERTIFICATE BackupEncryptCert TO FILE = 'H:\MSSQL\Backup\Keys\BackupEncryptCert.cer'
    WITH PRIVATE KEY (FILE = 'H:\MSSQL\Backup\Keys\BackupEncryptCert.PrivateKey.pvk', 
    ENCRYPTION BY PASSWORD = 'doodle')
GO

然后在新实例上创建它：

-- Restoring a certificate from existing certificate backup
CREATE CERTIFICATE BackupEncryptCert
    FROM FILE = 'H:\MSSQL\Backup\Keys\BackupEncryptCert.cer'
    WITH PRIVATE KEY (FILE = 'H:\MSSQL\Backup\BackupEncryptCert.PrivateKey.pvk',
    DECRYPTION BY PASSWORD = 'doodle')
GO

然后您将能够恢复您的加密备份。

在 SQL 中恢复加密备份

Restore encrypted Backup in SQL

sql

sql-server

tsql

encryption

backup