sql server存储过程、存储函数的加密、解密

8/18/2005来源:SQL技巧人气:26130

存储过程、存储函数的加密:WITH ENCRYPTION
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CREATE PRocedure dbo.sp_xml_main

@table_name nvarchar(260)='',

@dirname nvarchar(20)=''

WITH ENCRYPTION

as

begin

....................................................

end

go
 

 

存储过程、存储函数的解密(以下是一位绝世高人编写的代码)

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[sp_decrypt]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[sp_decrypt]

GO

 

/*--破解函数,过程,触发器,视图.仅限于SQLSERVER2000

 

--作者:J9988--*/

/*--调用示例

 

    --解密指定存储过程

    exec sp_decrypt 'AppSP_test'

 

    --对所有的存储过程解密

    declare tb cursor for

    select name from sysobjects where xtype='P' and status>0 and name<>'sp_decrypt'

   

    declare @name sysname

    open tb

    fetch next from tb into @name

    while @@fetch_status=0

    begin

        print '/*-------存储过程 ['+@name+'] -----------*/'

        exec sp_decrypt @name

        fetch next from tb into @name

    end

    close tb

    deallocate tb

--*/

 

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[SP_DECRYPT]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

    drop procedure [dbo].[SP_DECRYPT]

GO

 

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