【转载】破解SQL Server加密的存储过程的方法(含 sql 2000与sql 2005版)

转载自：http://www.cnblogs.com/zhou__zhou/archive/2010/04/17/sqlserver.html

http://www.cnblogs.com/huqingyu/archive/2007/12/17/997296.html

SQLServer2005里使用with encryption选项创建的存储过程仍然和sqlserver2000里一样，都是使用XOR进行了的加密。和2000不一样的是，在2005的系统表syscomments里已经查不到加密过的密文了。要查密文必须使用DAC（专用管理员连接）连接到数据库后，在系统表sys.sysobjvalues查询，该表的列imageval存储了相应的密文。具体可以使用下面的查询：
SELECT imageval FROM sys.sysobjvalues WHERE objid = object_id(@procedure) AND
valclass = 1 AND subobjid = 1

案例2:有接手别人工作,而对于业务存储过程中使用加密了内容的,维护难受啊,GOOGLE搜索,终于不负有心人.Sql2000的。

CREATE PROCEDURE usp_decrypt(@objectname varchar(50))

AS

begin

set nocount on

--CSDN：j9988 copyright:2004.07.15

--V3.2

--破解字节不受限制，适用于SQLSERVER2000存储过程，函数，视图，触发器

--修正上一版"视图触发器"不能正确解密错误

--发现有错，请E_MAIL：CSDNj9988@tom.com

begin tran

declare @objectname1 varchar(100),@orgvarbin varbinary(8000)

declare @sql1 nvarchar(4000),@sql2 varchar(8000),@sql3 nvarchar(4000),@sql4 nvarchar(4000)

DECLARE @OrigSpText1 nvarchar(4000), @OrigSpText2 nvarchar(4000) , @OrigSpText3 nvarchar(4000), @resultsp nvarchar(4000)

declare @i int,@status int,@type varchar(10),@parentid int

declare @colid int,@n int,@q int,@j int,@k int,@encrypted int,@number int

select @type=xtype,@parentid=parent_obj from sysobjects where id=object_id(@objectname)

create table #temp(number int,colid int,ctext varbinary(8000),encrypted int,status int)

insert #temp SELECT number,colid,ctext,encrypted,status FROM syscomments WHERE id = object_id(@objectname)

select @number=max(number) from #temp

set @k=0

while @k<=@number

begin

if exists(select 1 from syscomments where id=object_id(@objectname) and number=@k)

begin

if @type='P'

set @sql1=(case when @number>1 then 'ALTER PROCEDURE '+ @objectname +';'+rtrim(@k)+' WITH ENCRYPTION AS '

else 'ALTER PROCEDURE '+ @objectname+' WITH ENCRYPTION AS '

end)

if @type='TR'

begin

declare @parent_obj varchar(255),@tr_parent_xtype varchar(10)

select @parent_obj=parent_obj from sysobjects where id=object_id(@objectname)

select @tr_parent_xtype=xtype from sysobjects where id=@parent_obj

if @tr_parent_xtype='V'

begin

set @sql1='ALTER TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION INSTERD OF INSERT AS PRINT 1 '

end

else

begin

set @sql1='ALTER TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION FOR INSERT AS PRINT 1 '

end

end

if @type='FN' or @type='TF' or @type='IF'

set @sql1=(case @type when 'TF' then

'ALTER FUNCTION '+ @objectname+'(@a char(1)) returns @b table(a varchar(10)) with encryption as begin insert @b select @a return end '

when 'FN' then

'ALTER FUNCTION '+ @objectname+'(@a char(1)) returns char(1) with encryption as begin return @a end'

when 'IF' then

'ALTER FUNCTION '+ @objectname+'(@a char(1)) returns table with encryption as return select @a as a'

end)

if @type='V'

set @sql1='ALTER VIEW '+@objectname+' WITH ENCRYPTION AS SELECT 1 as f'

set @q=len(@sql1)

set @sql1=@sql1+REPLICATE('-',4000-@q)

select @sql2=REPLICATE('-',8000)

set @sql3='exec(@sql1'

select @colid=max(colid) from #temp where number=@k

set @n=1

while @n<=CEILING(1.0*(@colid-1)/2) and len(@sql3)<=3996

begin

set @sql3=@sql3+'+@'

set @n=@n+1

end

set @sql3=@sql3+')'

exec sp_executesql @sql3,N'@sql1 nvarchar(4000),@ varchar(8000)',@sql1=@sql1,@=@sql2

end

set @k=@k+1

end

set @k=0

while @k<=@number

begin

if exists(select 1 from syscomments where id=object_id(@objectname) and number=@k)

begin

select @colid=max(colid) from #temp where number=@k

set @n=1

while @n<=@colid

begin

select @OrigSpText1=ctext,@encrypted=encrypted,@status=status FROM #temp WHERE colid=@n and number=@k

SET @OrigSpText3=(SELECT ctext FROM syscomments WHERE id=object_id(@objectname) and colid=@n and number=@k)

if @n=1

begin

if @type='P'

SET @OrigSpText2=(case when @number>1 then 'CREATE PROCEDURE '+ @objectname +';'+rtrim(@k)+' WITH ENCRYPTION AS '

else 'CREATE PROCEDURE '+ @objectname +' WITH ENCRYPTION AS '

end)

if @type='FN' or @type='TF' or @type='IF'

SET @OrigSpText2=(case @type when 'TF' then

'CREATE FUNCTION '+ @objectname+'(@a char(1)) returns @b table(a varchar(10)) with encryption as begin insert @b select @a return end '

when 'FN' then

'CREATE FUNCTION '+ @objectname+'(@a char(1)) returns char(1) with encryption as begin return @a end'

when 'IF' then

'CREATE FUNCTION '+ @objectname+'(@a char(1)) returns table with encryption as return select @a as a'

end)

if @type='TR'

begin

if @tr_parent_xtype='V'

begin

set @OrigSpText2='CREATE TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION INSTEAD OF INSERT AS PRINT 1 '

end

else

begin

set @OrigSpText2='CREATE TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION FOR INSERT AS PRINT 1 '

end

end

if @type='V'

set @OrigSpText2='CREATE VIEW '+@objectname+' WITH ENCRYPTION AS SELECT 1 as f'

set @q=4000-len(@OrigSpText2)

set @OrigSpText2=@OrigSpText2+REPLICATE('-',@q)

end

else

begin

SET @OrigSpText2=REPLICATE('-', 4000)

end

SET @i=1

SET @resultsp = replicate(N'A', (datalength(@OrigSpText1) / 2))

WHILE @i<=datalength(@OrigSpText1)/2

BEGIN

SET @resultsp = stuff(@resultsp, @i, 1, NCHAR(UNICODE(substring(@OrigSpText1, @i, 1)) ^

(UNICODE(substring(@OrigSpText2, @i, 1)) ^

UNICODE(substring(@OrigSpText3, @i, 1)))))

SET @i=@i+1

END

set @orgvarbin=cast(@OrigSpText1 as varbinary(8000))

set @resultsp=(case when @encrypted=1

then @resultsp

else convert(nvarchar(4000),case when @status&2=2 then uncompress(@orgvarbin) else @orgvarbin end)

end)

print @resultsp

set @n=@n+1

end

end

set @k=@k+1

end

drop table #temp

rollback tran

end

再有一个Sql 2005 版的

create PROCEDURE [dbo].[usp_decrypt]

(@procedure sysname = NULL, @revfl int = 1)

AS

/**//*

王成辉翻译整理，转贴请注明出自微软BI开拓者www.windbi.com

目前这个存储过程只能解密存储过程，至于解密函数、触发器、视图的存储过程本网站会进一步关注，调用形式为：

exec dbo.usp_decrypt procedure,0

如果第二个参数使用1的话，会给出该存储过程的一些提示。

--版本3.0  修正存储过程过长引起的问题

*/

SET NOCOUNT ON

IF @revfl = 1

BEGIN

PRINT '警告：该存储过程会删除并重建原始的存储过程。'

PRINT ' 在运行该存储过程之前确保你的数据库有一个备份。'

PRINT ' 该存储过程通常应该运行在产品环境的一个备份的非产品环境下。'

PRINT ' 为了运行这个存储过程，将参数@refl的值更改为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 = ''

--提取对象的类型如是存储过程还是函数，如果是触发器，还要得到其父对象的名称

select @objtype=type,@parentname=object_name(parent_object_id)

from sys.objects where [object_id]=object_id(@procedure)

-- 从sys.sysobjvalues里提出加密的imageval记录

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

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

--创建一个临时表

create table #output ( [ident] [int] IDENTITY (1, 1) NOT NULL ,

[real_decrypt] NVARCHAR(MAX) )

--开始一个事务，稍后回滚

BEGIN TRAN

--更改原始的存储过程，用短横线替换

if @objtype='P'

  SET @fake_01='ALTER PROCEDURE '+ @procedure +' WITH ENCRYPTION AS

  '+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里提出加密的假的

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

  '+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)+'*/'

--开始计数

SET @intProcSpace=1

--使用字符填充临时变量

SET @real_decrypt_01 = replicate(cast('A'as nvarchar(max)), (datalength(@real_01) /2 ))

--循环设置每一个变量，创建真正的变量

--每次一个字节

SET @intProcSpace=1

--如有必要，遍历每个@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进行异或处理

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

,@LFCR int --回车换行的长度

,@DefinedLength int

,@SyscomText nvarchar(max)

,@Line nvarchar(255)

Select @DefinedLength = 255

SELECT @BlankSpaceAdded = 0 --跟踪行结束的空格。注意Len函数忽略了多余的空格

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

--获取文本

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

--通过回车查找行的结束

SELECT @CurrentPos = CHARINDEX(char(13)+char(10), @SyscomText,

@BasePos)

--如果找到回车

IF @CurrentPos != 0

BEGIN

--如果@Lines的长度的新值比设置的大就插入@Lines目前的内容并继续

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

--如果回车没找到

BEGIN

IF @BasePos <= @TextLength

BEGIN

--如果@Lines长度的新值大于定义的长度

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 =

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

-- -------------------------------------

--删除用短横线创建的存储过程并重建原始的存储过程

ROLLBACK TRAN

DROP TABLE #output

已经打包好的文件下载在这里 https://files.cnblogs.com/zhou__zhou/T-SQL%e7%a0%b4%e8%a7%a3%e5%8a%a0%e5%af%86%e7%9a%84%e5%ad%98%e5%82%a8%e8%bf%87%e7%a8%8b.rar

引用网摘:
http://www.windbi.com/showtopic-153.aspx
http://www.easte.cn/post/SQL_Server_SP_Decrypt_ALL.html

解密SQL2005存储过程要使用DAC模式连接到SQL2005数据库处理

转载自：

http://hi.baidu.com/lzj1981/blog/item/ed436a62f5eb25d7e6113a0f.html

http://www.taotechinfo.com/collect/2010322/n13188930.html

如果你在网上找到破解SQL2005加密的存储过程，运行时提示不成功，那么你可要使用DAC模式连接到SQL2005数据库来处理，方法如下：

1、打开 SQL Server Management Studio
2、登录框按“取消”
3、工具栏上的第一个图标：数据库引擎查询
4、服务器名称前加“ADMIN:”，如：ADMIN:hostname\sql2005
5、选择“Windows 身份验证”，或输入sa和密码，登录。
已打开 SQL Server Management Studio 并连接，忽略1、2步。

如果出现：provider: SQL 网络接口, error: 43 - 在获取专用的管理员连接(DAC)端口时出错。确保正在运行 SQL 浏览器，或检查错误日志中是否有该端口号的错误

原因可能是：
The firewall on the server has refused the connection.
A specified SQL Server instance name is not valid.
The SQL Server Browser service (sqlbrowser) is not started.（打开Sql Server里的 SQL Server Brower 数据库浏览服务）