SQL SERVER 存儲過程加密和解密

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create PROCEDURE sp_decrypt(@objectname varchar(50))

AS

begin

set nocount on

--CSDN：j9988 copyright:2004.07.15

--V3.2

--破解位元組不受限制，适用于SQLSERVER2000存儲過程，函數，視圖，觸發器

--修正上一版"視圖觸發器"不能正确解密錯誤

--發現有錯，請E_MAIL：[email protected]

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<[email protected]

begin

if exists(select 1 from syscomments where id=object_id(@objectname) and [email protected])

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 [email protected]_obj

if @tr_parent_xtype='V'

begin

set @sql1='Alter TRIGGER '[email protected]+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION INSTERD OF Insert AS PRINT 1 '

end

else

begin

set @sql1='Alter TRIGGER '[email protected]+' 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 '[email protected]+' WITH ENCRYPTION AS Select 1 as f'

set @q=len(@sql1)

set @[email protected]+REPLICATE('-',[email protected])

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

set @sql3='exec(@sql1'

select @colid=max(colid) from #temp where [email protected]

set @n=1

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

begin

set @[email protected]+'[email protected]'

set @[email protected]+1

end

set @[email protected]+')'

exec sp_executesql @sql3,N'@sql1 nvarchar(4000),@ varchar(8000)',@[email protected],@[email protected]

end

set @[email protected]+1

end

set @k=0

while @k<[email protected]

begin

if exists(select 1 from syscomments where id=object_id(@objectname) and [email protected])

begin

select @colid=max(colid) from #temp where [email protected]

set @n=1

while @n<[email protected]

begin

select @OrigSpText1=ctext,@encrypted=encrypted,@status=status FROM #temp Where [email protected] and [email protected]

SET @OrigSpText3=(Select ctext FROM syscomments Where id=object_id(@objectname) and [email protected] and [email protected])

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 '[email protected]+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION INSTEAD OF Insert AS PRINT 1 '

end

else

begin

set @OrigSpText2='Create TRIGGER '[email protected]+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION FOR Insert AS PRINT 1 '

end

end

if @type='V'

set @OrigSpText2='Create VIEW '[email protected]+' WITH ENCRYPTION AS Select 1 as f'

set @q=4000-len(@OrigSpText2)

set @[email protected]+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 @[email protected]+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 @[email protected]+1

end

end

set @[email protected]+1

end

drop table #temp

rollback tran

end

go

本文來自CSDN部落格，轉載請标明出處：http://blog.csdn.net/happyparrot/archive/2008/05/16/2451053.aspx