使用DAC连接的注意事项,并在其后继续键入服务器实例的名称

01 nvarchar(max)DECLARE @fake,然后我们准备两个加密后的存储过程,并在其后继续键入服务器实例的名称,PAYABLE 的服务器实例,在2005的系统表syscomments里已经查不到加密过的密文了,使用DAC连接的注意事项

于今截至,解密全经过马到功成,命令行方式下运作:EXEC
[DECODE_DATABASE]GO在C盘根目录下,解密后的囤积进度文本生成成功。运营前别忘记张开xp_cmdshell使用权力,同开荒DAC相像:或许命令行方式下敲如下命令:sp_configure
‘show advanced options’,1reconfiguregosp_configure
‘xp_cmdshell’,1reconfigurego


SET @real_01=(SELECT top 1 imageval FROM sys.sysobjvalues WHERE objid

object_id(@procedure) and valclass = 1 order by subobjid)

–成立贰个有的时候表
create table #output ( [ident] [int] IDENTITY (1, 1) NOT NULL ,
[real_decrypt] NVARCHAR(MAX) )
–开首两个事情,稍后回滚
BEGIN TRAN
–校订原始的积攒进程,用短横线替换
if @objtype=’P’
SET @fake_01=’ALTER PROCEDURE ‘+ @procedure +’ WITH ENCRYPTION AS
select 1
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/’
else if @objtype=’FN’
SET @fake_01=’ALTER FUNCTION ‘+ @procedure +'() RETURNS INT WITH
ENCRYPTION AS BEGIN RETURN 1
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/ END’
else if @objtype=’V’
SET @fake_01=’ALTER view ‘+ @procedure +’ WITH ENCRYPTION AS select 1
as col
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/’
else if @objtype=’TR’
SET @fake_01=’ALTER trigger ‘+ @procedure +’ ON ‘+@parentname+’WITH
ENCRYPTION AFTER INSERT AS RAISERROR (”N”,16,10)
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/’
EXECUTE (@fake_01)
–从sys.sysobjvalues里提议加密的假的
SET @fake_encrypt_01=(SELECT top 1 imageval FROM sys.sysobjvalues
WHERE objid =
object_id(@procedure) and valclass = 1 order by subobjid )
if @objtype=’P’
SET @fake_01=’Create PROCEDURE ‘+ @procedure +’ WITH ENCRYPTION AS
select 1
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/’
else if @objtype=’FN’
SET @fake_01=’CREATE FUNCTION ‘+ @procedure +'() RETURNS INT WITH
ENCRYPTION AS BEGIN RETURN 1
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/ END’
else if @objtype=’V’
SET @fake_01=’Create view ‘+ @procedure +’ WITH ENCRYPTION AS select 1
as col
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/’
else if @objtype=’TR’
SET @fake_01=’Create trigger ‘+ @procedure +’ ON ‘+@parentname+’WITH
ENCRYPTION AFTER INSERT AS RAISERROR (”N”,16,10)
/**//*’+REPLICATE(cast(‘*’as nvarchar(max)), datalength(@real_01)
/2 – @procNameLength)+’*/’
–最早计数
SET @intProcSpace=1
–使用字符填充不经常变量
SET @real_decrypt_01 = replicate(cast(‘A’as nvarchar(max)),
(datalength(@real_01) /2 ))
–循环设置每叁个变量,创立真正的变量
–每一遍三个字节
SET @intProcSpace=1
–如有必要,遍历每一种@real_xx变量并解密
WHILE @intProcSpace<=(datalength(@real_01)/2)
BEGIN
–真的和假的和加密的假的展开异或管理
SET @real_decrypt_01 = stuff(@real_decrypt_01, @intProcSpace, 1,
NCHAR(UNICODE(substring(@real_01, @intProcSpace, 1)) ^
(UNICODE(substring(@fake_01, @intProcSpace, 1)) ^
UNICODE(substring(@fake_encrypt_01, @intProcSpace, 1)))))
SET @intProcSpace=@intProcSpace+1
END

–通过sp_helptext逻辑向表#output里插入变量
insert #output (real_decrypt) select @real_decrypt_01
–select real_decrypt AS ‘#output chek’ from #output –测试


–开始从sp_helptext提取


declare @dbname sysname
,@BlankSpaceAdded int
,@BasePos int
,@CurrentPos int
,@TextLength int
,@LineId int
,@AddOnLen int
,@LFCWrangler int –回车换行的长度
,@DefinedLength int
,@SyscomText nvarchar(max)
,@Line nvarchar(255)
Select @DefinedLength = 255
SELECT @BlankSpaceAdded = 0
–追踪行甘休的空格。注意Len函数忽视了剩下的空格
CREATE TABLE #CommentText
(LineId int
,Text nvarchar(255) collate database_default)
–使用#output代替sys.sysobjvalues
DECLARE ms_crs_syscom CURSOR LOCAL
FOR SELECT real_decrypt from #output
ORDER BY ident
FOR READ ONLY
–获得文本
SELECT @LFCR = 2
SELECT @LineId = 1
OPEN ms_crs_syscom
FETCH NEXT FROM ms_crs_syscom into @SyscomText
WHILE @@fetch_status >= 0
BEGIN
SELECT @BasePos = 1
SELECT @CurrentPos = 1
SELECT @TextLength = LEN(@SyscomText)
WHILE @CurrentPos != 0
BEGIN
–通过回车查找行的实现
SELECT @CurrentPos = CHARINDEX(char(13)+char(10), @SyscomText,
@BasePos)
–倘使找到回车
IF @CurrentPos != 0
BEGIN
–借使@Lines的尺寸的新值比设置的大就插入@Lines如今的源委并一而再一而再再而三
While (isnull(LEN(@Line),0) + @BlankSpaceAdded +
@CurrentPos-@BasePos + @LFCR) > @DefinedLength
BEGIN
SELECT @AddOnLen = @DefinedLength-(isnull(LEN(@Line),0) +
@BlankSpaceAdded)
INSERT #CommentText VALUES
( @LineId,
isnull(@Line, N”) + isnull(SUBSTRING(@SyscomText,
@BasePos, @AddOnLen), N”))
SELECT @Line = NULL, @LineId = @LineId + 1,
@BasePos = @BasePos + @AddOnLen, @BlankSpaceAdded = 0
END
SELECT @Line = isnull(@Line, N”) +
isnull(SUBSTRING(@SyscomText, @BasePos, @CurrentPos-@BasePos + @LFCR),
N”)
SELECT @BasePos = @CurrentPos+2
INSERT #CommentText VALUES( @LineId, @Line )
SELECT @LineId = @LineId + 1
SELECT @Line = NULL
END
ELSE
–如若回车没找到
BEGIN
IF @BasePos <= @TextLength
BEGIN
–要是@Lines长度的新值大于定义的尺寸
While (isnull(LEN(@Line),0) + @BlankSpaceAdded +
@TextLength-@BasePos+1 ) > @DefinedLength
BEGIN
SELECT @AddOnLen = @DefinedLength –
(isnull(LEN(@Line),0) + @BlankSpaceAdded)
INSERT #CommentText VALUES
( @LineId,
isnull(@Line, N”) + isnull(SUBSTRING(@SyscomText,
@BasePos, @AddOnLen), N”))
SELECT @Line = NULL, @LineId = @LineId + 1,
@BasePos = @BasePos + @AddOnLen, @BlankSpaceAdded =
0
END
SELECT @Line = isnull(@Line, N”) +
isnull(SUBSTRING(@SyscomText, @BasePos, @TextLength-@BasePos+1 ), N”)
if LEN(@Line) < @DefinedLength and charindex(‘ ‘,
@SyscomText, @TextLength+1 ) > 0
BEGIN
SELECT @Line = @Line + ‘ ‘, @BlankSpaceAdded = 1
END
END
END
END
FETCH NEXT FROM ms_crs_syscom into @SyscomText
END
IF @Line is NOT NULL
INSERT #CommentText VALUES( @LineId, @Line )
select Text from #CommentText order by LineId
CLOSE ms_crs_syscom
DEALLOCATE ms_crs_syscom
DROP TABLE #CommentText


–结束从sp_helptext提取


–删除用短横线创制的蕴藏进程相提并论建原始的积存进度
ROLLBACK TRAN
DROP TABLE #output
go

1、并不曾去除原存储重新建立,仅仅在调节台做了二个出口,拷贝出来特不低价。2、对于长度大点的加密数据会解密失利。带着那多个难点来改过此存款和储蓄进程。先做希图职业,首先须要明白DAC这么个东西,
指的是数据库教程专项使用管理员连接,为协会者提供的一种非常的确诊连接。知道了后得先张开它,以SQL2009为例:右击对象浏览器,找到Facets,点击,如图:找到Sruface
Area
Configuration,选择RemoteDacEnabled,设为True:然后开展DAC登陆,CMD格局下敲如下命令,不精晓原理的能够活动钻研:sqlcmd
-A -S 192.168.1.101 -U sa -P 123456发令提醒行下展开需处理的数据库:USE
TESTGO计划妥善,复制寻找得到的积存进程,生成解密存储程,然后我们思考多个加密后的寄放进程,当中一个长短十分大,验证得出结论,短小的存储进度神速即解密成功,并出口,但长度非常大的却解密退步。接下来看看其怎样解密的:先看那句select
@maxColID = max(subobjid卡塔尔国,@intEncrypted = imageval FROM sys.sysobjvalues
WHERE objid =
object_id(@procedure卡塔尔指的是加密后的数额贮存在sys.sysobjvalues表中,其内容存放于imageval字段。知道了加密后的多少,就得进行解密,它定义了4个注重字段:DECLARE
@real_01 nvarchar(max)DECLARE @fake_01 nvarchar(max)DECLARE
@fake_encrypt_01 nvarchar(max)DECLARE @real_decrypt_01
nvarchar(max卡塔尔(قطر‎分别指的固有加密数据内容、原始加密存款和储蓄进度的CREATE语句、自个儿组织的假的蕴藏进度加密后的数据、最后解密后的储存进程。其艺术是按位将@real_01、@fake_encrypt_01、@real_decrypt_01举办异或运算,此处为什么如此管理,原理不明!!!WHILE
@intProcSpace=(datalength(@real_01)/2)BEGIN –xor real fake fake
encrypted SET @real_decrypt_01 = stuff(@real_decrypt_01,
@intProcSpace, 1, NCHAR(UNICODE(substring(@real_01, @intProcSpace, 1))
^ (UNICODE(substring(@fake_01, @intProcSpace, 1))
^UNICODE(substring(@fake_encrypt_01, @intProcSpace, 1卡塔尔卡塔尔State of Qatar卡塔尔(قطر‎State of Qatar SET
@intProcSpace=@intProcSpace+1END实际上到此甘休,加密后的仓库储存进程已解密出来了。其下部还应该有一大段语句未有从长计议,但大概是接收sp_helptext将内容输出,方法比较繁索,并且没有高达大家要的功用,大家将换一种艺术举办输出。基本上就像是此轻松,除了原理不知晓外,基本央月实现要求,接下去要化解起来建议的八个难题。首先是长度难题,为何长度一大就解密战败,来看看@real_decrypt_01的概念并进行先河化@real_decrypt_01的语句:DECLARE
@real_decrypt_01 nvarchar(max)SET @real_decrypt_01 = replicate(N’A’,
(datalength(@real_01卡塔尔(قطر‎ /2
State of Qatar卡塔尔(قطر‎乍一看没什么难题,但大家选取LEN(@real_decrypt_01State of Qatar输出看看,最大出口长度为4000,也许难点就应际而生NVARCHAHaval的长短上了,理论上NVARCHAOdyssey(MAX卡塔尔国援救2G的抑扬顿挫。为啥会现身这种景观并未有色金属钻探所究过,但有人给出了缓慢解决方法,实行显示调换:SET
@real_decrypt_01 = replicate(CONVERT(NVARCHAR(MAX), N’A’),
(datalength(@real_01卡塔尔国 /2
卡塔尔(قطر‎卡塔尔(قطر‎别的的几还会有几处也是该原因,更改后开展重国民党的新生活运动行,难题解决,长度十分的大的囤积进度也解密成功。第一个难题一举成功了,怎么着能便于的输出呢,试验了除去重新建立,但未中标,那么就用最简便的措施吗,利用xp_cmdshell将内容输出到文本。先创设二个物理表,用于存款和储蓄解密后的数据:

DECLARE @real_01 nvarchar(max)
DECLARE @real_02 nvarchar(max)
DECLARE @real_03 nvarchar(max)
DECLARE @real_04 nvarchar(max)
DECLARE @real_05 nvarchar(max)

动用DAC连接的注意事项:

终极是改建后的仓库储存进程:

CREATE PROCEDURE dbo.sp__procedure$decrypt
(@procedure sysname = NULL, @revfl int = 1)
AS
SET NOCOUNT ON

开启DAC的SQL

然后创立一个储存进程,遍历全体加密过的存放进程,调用解密存款和储蓄进度进展解密,解密后输出:

— Go through each @real_xx variable and decrypt it, as necessary
WHILE @intProcSpace<=(datalength(@real_04)/2)
BEGIN
–xor real & fake & fake encrypted
SET @real_decrypt_04 = stuff(@real_decrypt_04, @intProcSpace, 1,
NCHAR(UNICODE(substring(@real_04, @intProcSpace, 1)) ^
(UNICODE(substring(@fake_04, @intProcSpace, 1)) ^
UNICODE(substring(@fake_encrypt_04, @intProcSpace, 1)))))
SET @intProcSpace=@intProcSpace+1
END

1、独有系統管理員(sysadmin卡塔尔(قطر‎剧中人物相關成員能够应用DAC連接存取SQL
Server(Local卡塔尔本地连接

CREATE PROCEDURE [dbo].[DECODE_DATABASE]ASSET NOCOUNT ONBEGIN 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'ENDGO

–defined length

While (isnull(LEN(@Line),0) + @BlankSpaceAdded +
@TextLength-@BasePos+1 ) > @DefinedLength
BEGIN
SELECT @AddOnLen = @DefinedLength –
(isnull(LEN(@Line),0) + @BlankSpaceAdded)
INSERT #CommentText VALUES
( @LineId,
isnull(@Line, N”) + isnull(SUBSTRING(@SyscomText,
@BasePos, @AddOnLen), N”))
SELECT @Line = NULL, @LineId = @LineId + 1,
@BasePos = @BasePos + @AddOnLen, @BlankSpaceAdded =
0
END
SELECT @Line = isnull(@Line, N”) +
isnull(SUBSTRING(@SyscomText, @BasePos, @TextLength-@BasePos+1 ), N”)
if LEN(@Line) < @DefinedLength and charindex(‘ ‘,
@SyscomText, @TextLength+1 ) > 0
BEGIN
SELECT @Line = @Line + ‘ ‘, @BlankSpaceAdded = 1
END
END
END
END

FETCH NEXT FROM ms_crs_syscom into @SyscomText
END

IF @Line is NOT NULL
INSERT #CommentText VALUES( @LineId, @Line )

select Text from #CommentText order by LineId

CLOSE ms_crs_syscom
DEALLOCATE ms_crs_syscom

DROP TABLE #CommentText


— End of extract from sp_helptext


— Drop the procedure that was setup with dashes and rebuild it with the
good stuff
— Version 1.1 mod; makes rebuilding hte proc unnecessary
ROLLBACK TRAN

DROP TABLE #output

GO

SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO

 1 USE master        
 2 GO        
 3 sp_configure 'show advanced options', 1 
 4 GO    
 5 sp_configure 'remote admin connections', 1 
 6 GO        
 7 RECONFIGURE WITH OVERRIDE    
 8 GO
 9 
10 
11 SELECT *  FROM sys.configurations where name = 'remote admin connections'
CREATE TABLE [dbo].[SQL_DECODE]( [ID] [int] IDENTITY(1,1) NOT NULL, [SQLTEXT] [nvarchar](max) NOT NULL, CONSTRAINT [ID] PRIMARY KEY CLUSTERED ( [ID] ASC)) ON [PRIMARY]GO

select @real_decrypt_01a = ”
   ,@real_decrypt_02a = ”
   ,@real_decrypt_03a = ”
   ,@real_decrypt_04a = ”
   ,@real_decrypt_05a = ”

3、使用DAC经常是讓DBA查詢和消遣SQL Server問題(當無法符合规律連接執行個體卡塔尔,

CREATE PROCEDURE [dbo].[DECODE_PROC]( @PROC_NAME SYSNAME = NULL)ASSET NOCOUNT ONDECLARE @PROC_NAME_LEN INT --存储过程名长度DECLARE @MAX_COL_ID SMALLINT --最大列IDSELECT @MAX_COL_ID = MAX(subobjid) FROM sys.sysobjvalues WHERE objid = OBJECT_ID(@PROC_NAME) GROUP BY imagevalSELECT @PROC_NAME_LEN = DATALENGTH(@PROC_NAME) + 29DECLARE @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,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 BIGINTSET @REAL_DATA_LEN = DATALENGTH(@REAL_01)--PRINT @REAL_DATA_LENDECLARE @FACK_LEN BIGINTSET @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 BIGINTSET @INT_PROC_SPACE = 1WHILE @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 + 1END--移除WITH ENCRYPTIONSET @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_NAMEEXEC(@FACK_01)GO

— Go through each @real_xx variable and decrypt it, as necessary
WHILE @intProcSpace<=(datalength(@real_05)/2)
BEGIN
–xor real & fake & fake encrypted
SET @real_decrypt_05 = stuff(@real_decrypt_05, @intProcSpace, 1,
NCHAR(UNICODE(substring(@real_05, @intProcSpace, 1)) ^
(UNICODE(substring(@fake_05, @intProcSpace, 1)) ^
UNICODE(substring(@fake_encrypt_05, @intProcSpace, 1)))))
SET @intProcSpace=@intProcSpace+1
END

图片 1

FETCH NEXT FROM ms_crs_syscom into @SyscomText

2>GO

if exists(select * from sysobjects where name=’sp_windbi$decrypt’ and
xtype=’P’)
drop proc [sp_windbi$decrypt]
go
Create PROCEDURE [dbo].[sp_windbi$decrypt]
(@procedure sysname = NULL, @revfl int = 0)
AS
/**//*
王成辉翻译收拾,转发帖子请注脚来源微软BIPortland Trail Blazerswww.windbi.com
调用方式为:
exec dbo.sp__windbi$decrypt @procedure,0
假如第1个参数使用1的话,会付给该存款和储蓄进度的一些唤起。
–版本4.0 修正存款和储蓄进度过长解密出来是单手的难题
*/
SET NOCOUNT ON
IF @revfl = 1
BEGIN
PQX56INT ‘警报:该存款和储蓄进程会删除等量齐观建原始的积累进程。’
PMuranoINT ‘ 在运转该存款和储蓄进度以前确认保障您的数据库有二个备份。’
PEnclaveINT ‘ 该存款和储蓄进程常常应该运转在成品境遇的三个备份的非产物情况下。’
P中华VINT ‘ 为了运维这几个蕴藏进程,将参数@refl的值改正为0。’
RETURN 0
END
DECLARE @intProcSpace bigint, @t bigint, @maxColID
smallint,@procNameLength int
select @maxColID = max(subobjid) FROM
sys.sysobjvalues WHERE objid = object_id(@procedure)
–select @maxColID as ‘Rows in sys.sysobjvalues’
select @procNameLength = datalength(@procedure) + 29
DECLARE @real_01 nvarchar(max)
DECLARE @fake_01 nvarchar(max)
DECLARE @fake_encrypt_01 nvarchar(max)
DECLARE @real_decrypt_01 nvarchar(max),@real_decrypt_01a
nvarchar(max)
declare @objtype varchar(2),@ParentName nvarchar(max)
select @real_decrypt_01a = ”
–提取对象的品种如是存款和储蓄进度还是函数,如若是触发器,还要得到其父对象的名号
select @objtype=type,@parentname=object_name(parent_object_id)
from sys.objects where [object_id]=object_id(@procedure)
— 从sys.sysobjvalues里建议加密的imageval记录

— create this table for later use
create table #output ( [ident] [int] IDENTITY (1, 1) NOT NULL ,
[real_decrypt] NVARCHAR(MAX)
)

2、一個執行個體只好存在一個DAC。  

–loop through each of the variables sets of variables, building the
real variable
–one byte at a time.
SET @intProcSpace=1

 

WHILE @CurrentPos != 0
BEGIN
–Looking for end of line followed by carriage return
SELECT @CurrentPos = CHARINDEX(char(13)+char(10), @SyscomText,
@BasePos)

4、好比執行sp_who2、Kill SPID、DBCC SQLPEEvoqueF、DBCC DROPCLEANBUFFE奥德赛S
…等,使用DAC連接時,切勿執行需耗費多量資源的命令,如DBCC CHECKDB、DBCC
SH奥迪Q5INKDATABASE..等

WHILE @@fetch_status >= 0
BEGIN

也足以在外围应用配置器这里开启

SELECT @LFCR = 2
SELECT @LineId = 1

 

DECLARE @intProcSpace bigint
   ,@t bigint
   ,@maxColID smallint
   ,@intEncrypted tinyint
   ,@procNameLength int

指令行下使用DAC登陆
sqlcmd加上 /A 选项  专项使用管理总是
sqlcmd /S  JOE  /E  /A
1>DBCC DROPCLEANBUFFERS

— extract the encrypted imageval rows from sys.sysobjvalues
SELECT @real_01=substring(imageval,1,8000)
   ,@real_02=substring(imageval,8001,16000)
   ,@real_03=substring(imageval,16001,24000)
   ,@real_04=substring(imageval,24001,32000)
   ,@real_05=substring(imageval,32001,40000)
FROM sys.sysobjvalues
WHERE objid = object_id(@procedure) and valclass = 1 and subobjid = 1

6、sql server browse服必需得开启