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親自測試了一下,發(fā)現(xiàn)2k的確實可以破解. sk5的可能需要搞到master表.
原文如下
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SQL Server加密存儲過程用到“WITH ENCRYPTION”參數(shù)的時候，就可以將它加密，這種加密方式是不可逆的，再也不能打開了，嗚嗚～那么我們改怎么樣才能看到原來的代碼而不破壞這個存儲過程呢？icech在網(wǎng)上找到了兩個十分十分大牛的人！一個是j9988，早在2004年就寫了一個可以破解加密的存儲過程，支持SQL Server 2000非常的好；另一個是王成輝翻譯老外寫的一個，竟然可以支持SQL Server 2005版本！

如何加密SQL Server存儲過程？

命令如：
CREATE Procedure 存儲過程名(...) WITH ENCRYPTION AS ...

SQLServer2005里使用with encryption選項創(chuàng)建的存儲過程仍然和sqlserver2000里一樣，都是使用XOR進(jìn)行了的加密。和2000不一樣的是，在2005的系統(tǒng)表syscomments里已經(jīng)查不到加密過的密文了。要查密文必須使用DAC（專用管理員連接）連接到數(shù)據(jù)庫后，在系統(tǒng)表 sys.sysobjvalues查詢，該表的列imageval存儲了相應(yīng)的密文。具體可以使用下面的查詢：

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

針對SQL Server 2000的解密存儲過程

create PROCEDURE sp_decrypt(@objectname varchar(50))
AS
begin
set nocount on
--CSDN：j9988 copyright:2004.07.15
--V3.2
--破解字節(jié)不受限制，適用于SQLSERVER2000存儲過程，函數(shù)，視圖，觸發(fā)器
--修正上一版"視圖觸發(fā)器"不能正確解密錯誤
--發(fā)現(xiàn)有錯，請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