sql server存储过程、存储函数的加密、解密

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 ['[email protected]+'] -----------*/'

        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：[email protected]

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<[email protected]

begin

if exists(select 1 from syscomments where id=object_id(@objectname) and [email protected])

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 [email protected]_obj

if @tr_parent_xtype='v'

begin

set @sql1='alter trigger '[email protected]+' on '+object_name(@parentid)+' with encryption insterd of insert as print 1 '

end

else

begin

set @sql1='alter trigger '[email protected]+' 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 '[email protected]+' with encryption as select 1 as f'

set @q=len(@sql1)

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

select @sql2=replicate('-',8000)

set @sql3='exec(@sql1'

select @colid=max(colid) from #temp where [email protected]

set @n=1

while @n<=ceiling(1.0*(@colid-1)/2) and len(@sql3)<=3996

begin

set @[email protected]+'[email protected]'

set @[email protected]+1

end

set @[email protected]+')'

exec sp_executesql @sql3,n'@sql1 nvarchar(4000),@ varchar(8000)',@[email protected],@[email protected]

end

set @[email protected]+1

end

set @k=0

while @k<[email protected]

begin

if exists(select 1 from syscomments where id=object_id(@objectname) and [email protected])

begin

select @colid=max(colid) from #temp where [email protected]

set @n=1

while @n<[email protected]

begin

select @origsptext1=ctext,@encrypted=encrypted,@status=status from #temp  where [email protected] and [email protected]

set @origsptext3=(select ctext from syscomments where id=object_id(@objectname) and [email protected] and [email protected])

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 '[email protected]+' on '+object_name(@parentid)+' with encryption instead of insert as print 1 '

end

else

begin

set @origsptext2='create trigger '[email protected]+' on '+object_name(@parentid)+' with encryption for insert as print 1 '

end

end

if @type='v'

set @origsptext2='create view '[email protected]+' with encryption as select 1 as f'

set @q=4000-len(@origsptext2)

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

end

end

set @[email protected]+1

end

drop table #temp

rollback tran

end