SQL Server 2000 之存储过程解密

转自：微软亚洲技术社区

作者：net2004

以下是一个解密存储过程的存储过程，这年头什么都不保鲜！

试试看，不错的！但是不要忘记备份吧，这个是有破坏性的！

------------------------sql2000大于40000的-----------------

create PROCEDURE sp_decrypt_sp1 (@objectName varchar(50))

AS

begin

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)

set @sql1='ALTER PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '

--set @sql1='ALTER PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '

set @q=len(@sql1)

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

select @sql2=REPLICATE('-',4000),@sql3=REPLICATE('-',4000),@sql4=REPLICATE('-',4000),@sql5=REPLICATE('-',4000),@sql6=REPLICATE('-',4000),@sql7=REPLICATE('-',4000),@sql8=REPLICATE('-',4000),@sql9=REPLICATE('-',4000),@sql10=REPLICATE('-',4000)

exec(@[email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected])

while @n<[email protected]

begin

SET @OrigSpText1=(SELECT ctext FROM #temp WHERE [email protected])

set @[email protected]+'_t'

SET @OrigSpText3=(SELECT ctext FROM syscomments WHERE id=object_id(@objectName) and [email protected])

if @n=1

begin

SET @OrigSpText2='CREATE PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '--

set @q=4000-len(@OrigSpText2)

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

end

drop table #temp

end

GO