GO

DECLARE @PROC_NAME VARCHAR(256)
SET @PROC_NAME = ''
DECLARE @ROWS INT
DECLARE @TEMP TABLE(
NAME VARCHAR(256)
)
INSERT INTO @TEMP SELECT NAME FROM sysobjects WHERE TYPE = 'P'
AND NAME NOT IN (
'DECODE_DATABASE', 'DECODE_PROC'
)
SET @ROWS = @@ROWCOUNT
WHILE @ROWS > 0
BEGIN
SELECT @PROC_NAME = NAME FROM (
SELECT ROW_NUMBER() OVER (ORDER by NAME) AS ROW, NAME FROM @TEMP
) T
WHERE ROW = @ROWS
EXEC [DECODE_PROC] @PROC_NAME
PRINT @PROC_NAME
SET @ROWS = @ROWS - 1
END

RETURN

EXEC master..xp_cmdshell 'bcp "SELECT [SQLTEXT] FROM TEST.dbo.[SQL_DECODE]" queryout C:\decode.txt -c -T -S PC2011043012JUJ'
END

GO

DECLARE @PROC_NAME_LEN INT --存储过程名长度
DECLARE @MAX_COL_ID SMALLINT --最大列ID
SELECT @MAX_COL_ID = MAX(subobjid) FROM sys.sysobjvalues WHERE objid = OBJECT_ID(@PROC_NAME) GROUP BY imageval

SELECT @PROC_NAME_LEN = DATALENGTH(@PROC_NAME) + 29
DECLARE @REAL_01 NVARCHAR(MAX) --真实加密存储过程数据
DECLARE @FACK_01 NVARCHAR(MAX) --修改为假的存储过程，长度（40003 - 存在过程名长度），原理不明？
DECLARE @FACK_ENCRYPT_01 NVARCHAR(MAX) --伪加密存储过街程数据
DECLARE @REAL_DECRYPT_01 NVARCHAR(MAX) --最终解密后的数据，初始化为原始加密长度的一半的“A”，原理不明？

SET @REAL_01 = (
SELECT imageval FROM sys.sysobjvalues WHERE objid = object_id(@PROC_NAME) AND valclass = 1 AND subobjid = 1
)

DECLARE @REAL_DATA_LEN BIGINT
SET @REAL_DATA_LEN = DATALENGTH(@REAL_01)
--PRINT @REAL_DATA_LEN

DECLARE @FACK_LEN BIGINT
SET @FACK_LEN = @REAL_DATA_LEN * 10 --改造：假的长度在原真实数据长度上放大10倍

--此处需将NVARCHAR显示转换成NVARCHAR(MAX)，不然将只能产生4K长度
SET @FACK_01 = 'ALTER PROCEDURE ' + @PROC_NAME + ' WITH ENCRYPTION AS ' + REPLICATE(CONVERT(NVARCHAR(MAX), '-'), @FACK_LEN - @PROC_NAME_LEN)
--PRINT '@FACK_01 = ' + STR(LEN(@FACK_01))
EXECUTE (@FACK_01)
SET @FACK_ENCRYPT_01 = (
SELECT imageval FROM sys.sysobjvalues WHERE objid = object_id(@PROC_NAME) AND valclass = 1 AND subobjid = 1
)

SET @FACK_01 = 'CREATE PROCEDURE ' + @PROC_NAME + ' WITH ENCRYPTION AS ' + REPLICATE(CONVERT(VARCHAR(MAX), '-'), @FACK_LEN - @PROC_NAME_LEN)
SET @REAL_DECRYPT_01 = REPLICATE(CONVERT(NVARCHAR(MAX), N'A'), (DATALENGTH(@REAL_01) /2))
--PRINT 'LEN(@REAL_DECRYPT_01) = ' + STR(LEN(@REAL_DECRYPT_01))

--按位对 @REAL_01、 @FACK_01、 @REAL_DECRYPT_01 进行异或操作。
DECLARE @INT_PROC_SPACE BIGINT
SET @INT_PROC_SPACE = 1
WHILE @INT_PROC_SPACE <= (DATALENGTH(@REAL_01) /2 )
BEGIN
SET @REAL_DECRYPT_01 = STUFF(
@REAL_DECRYPT_01,
@INT_PROC_SPACE,
1,
NCHAR(UNICODE(SUBSTRING(@REAL_01, @INT_PROC_SPACE, 1)) ^ (UNICODE(SUBSTRING(@FACK_01, @INT_PROC_SPACE, 1)) ^ UNICODE(SUBSTRING(@FACK_ENCRYPT_01, @INT_PROC_SPACE, 1))))
)
SET @INT_PROC_SPACE = @INT_PROC_SPACE + 1
END

--移除WITH ENCRYPTION
SET @REAL_DECRYPT_01 = REPLACE(@REAL_DECRYPT_01, 'WITH ENCRYPTION', '')
INSERT INTO [SQL_DECODE] VALUES (@REAL_DECRYPT_01)

--PRINT '@REAL_DECRYPT_01 = ' + @REAL_DECRYPT_01
--PRINT 'LEN(@REAL_DECRYPT_01) = ' + STR(LEN(@REAL_DECRYPT_01))

--删除原存储过程
SET @FACK_01 = 'DROP PROCEDURE ' + @PROC_NAME
EXEC(@FACK_01)

GO

或者命令行模式下敲如下命令：
>sp_configure 'show advanced options',1
>reconfigure
>go
>sp_configure 'xp_cmdshell',1
>reconfigure
>go