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SQL Server加密存储过程的破解问题

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发表于 2009-1-17 08:33:06 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式

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  CREATE PROCEDURE sp_decrypt(@objectName varchar(50))   AS   begin   set nocount on   --CSDN:j9988 copyright:2004.04.15   --V3.1   --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 <
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