使用 WITH ENCRYPTION 选项 WITH ENCRYPTION 子句对用户隐藏存储过程的文本。下例创建加密过程，使用 sp_helptext 系统存储过程获取关于加密过程的信息，然后尝试直接从 syscomments 表中获取关于该过程的信息。
IF EXISTS (Select name FROM sysobjects Where name = ‘encrypt_this’ AND type = ‘P’) Drop PROCEDURE encrypt_this GO USE pubs GO Create PROCEDURE encrypt_this WITH ENCRYPTION AS Select * FROM authors GO
EXEC sp_helptext encrypt_this
下面是结果集：
The object’s comments have been encrypted.
接下来，选择加密存储过程内容的标识号和文本。
Select c.id, c.text FROM syscomments c INNER JOIN sysobjects o ON c.id = o.id Where o.name = ‘encrypt_this’
下面是结果集：
说明 text 列的输出显示在单独一行中。执行时，该信息将与 id 列信息出现在同一行中。 Id text ———- ———————————————————— 1413580074 ?????????????????????????????????e??????????????????????????????????????????????????????????????????????????
(1 row(s) affected)
备注： create proc name with encryption as begin –语句 end
Create TRIGGER trigger_name ON { table | view } WITH ENCRYPTION FOR Update AS begin –语句 end
Sql存储过程解密算法 破解微软的加密算法 网上同样有很多的Sql存储过程的解密软件，但大都是收费的。 下边是网上流传的Sql存储过程解密算法，虽非官方，但绝对可行！ 同样可用于解密SQL存储过程或者触发器。
程序代码
create PROCEDURE sp_decrypt(@objectname varchar(50)) AS begin set nocount on –：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：j9988@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
go
转载于:https://www.cnblogs.com/Gaojier/archive/2010/04/08/2783576.html
