SQLServer中不破坏原加密存储的存储解密
日期:2006-12-06 荐:
*/ alter PROCEDURE sp_decrypt (@objectName varchar(50)) AS begin begin transaction --add by playyuer declare @objectname1 varchar(100) declare @sql1 nvarchar(4000),@sql2 nvarchar(4000),@sql3 nvarchar(4000),@sql4 nvarchar(4000),@sql5 nvarchar(4000),@sql6 nvarchar(4000),@sql7 nvarchar(4000),@sql8 nvarchar(4000),@sql9 nvarchar(4000),@sql10 nvarchar(4000) DECLARE @OrigSpText1 nvarchar(4000), @OrigSpText2 nvarchar(4000) , @OrigSpText3 nvarchar(4000), @resultsp nvarchar(4000) declare @i int , @t bigint declare @m int,@n int,@q int set @m=(SELECT max(colid) FROM syscomments WHERE id = object_id (@objectName)) set @n=1 --get encrypted data create table #temp(colid int,ctext varbinary(8000)) insert #temp SELECT colid,ctext FROM syscomments WHERE id = object_id (@objectName) vset @sql1='ALTER PROCEDURE ' @objectName ' WITH ENCRYPTION AS ' --set @sql1='ALTER PROCEDURE ' @objectName ' WITH ENCRYPTION AS ' set @q=len(@sql1) set @sql1=@sql1 REPLICATE('-',4000-@q) select @sql2=REPLICATE('-',4000),@sql3=REPLICATE('-',4000),@sql4=REPLICATEv('-',4000),@sql5=REPLICATE('- ',4000),@sql6=REPLICATE('-',4000),@sql7=REPLICATE('-',4000),@sql8=REPLICATE ('-',4000),@sql9=REPLICATE('- ',4000),@sql10=REPLICATE('-',4000) exec(@sql1 @sql2 @sql3 @sql4 @sql5 @sql6 @sql7 @sql8 @sql9 @sql10) while @n< =@m begin SET @OrigSpText1=(SELECT ctext FROM #temp WHERE colid=@n) set @objectname1=@objectname '_t' SET @OrigSpText3=(SELECT ctext FROM syscomments WHERE id=object_id (@objectName) and colid=@n) if @n=1 begin SET @OrigSpText2='CREATE PROCEDURE ' @objectName ' WITH vENCRYPTION AS '-- set @q=4000-len(@OrigSpText2) set @OrigSpText2=@OrigSpText2 REPLICATE('-',@q) end else begin SET @OrigSpText2=REPLICATE('-', 4000) end --start counter SET @i=1 --fill temporary variable SET @resultsp = replicate(N'A', (datalength(@OrigSpText1) / 2)) --loop WHILE @i< =datalength(@OrigSpText1)/2 BEGIN --reverse encryption (XOR original bogus bogus encrypted) 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 --drop original SP --EXECUTE ('drop PROCEDURE ' @objectName) --remove encryption --preserve case SET @resultsp=REPLACE((@resultsp),'WITH ENCRYPTION', '') SET @resultsp=REPLACE((@resultsp),'With Encryption', '') SET @resultsp=REPLACE((@resultsp),'with encryption', '') IF CHARINDEX('WITH ENCRYPTION',UPPER(@resultsp) )>0 SET @resultsp=REPLACE(UPPER(@resultsp),'WITH ENCRYPTION', '') --replace Stored procedure without enryption print @resultsp --execute( @resultsp) set @n=@n 1 end drop table #temp end rollback transaction --add by playyuer GO /* 适合40000字符。 每次4000 print出来,自已贴。 切记:我见过的解过程都是对原过程进行破坏。破解前一定要备份!!!! 超过40000的,自已加SQL(我上面用SQL.SQL2--SQL10) 超长的可加SQL11--sql20........ */
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