sql server 对储存过程和函数的加密解密

加密使用关键字：ENCRYPTION

CREATE procedure dbo.sp_EytTest @para varchar(50) WITH ENCRYPTION as begin select @para end go

 

解密：

解密的储存过程都来自网络，需要在DAC下使用.

sql server 2000 解密 :

create PROCEDURE [dbo].[sp_decrypt](@objectname varchar(50)) AS begin set nocount on 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

sql server 2005/2008 解密 :

create PROCEDURE [dbo].[sp__windbi$decrypt] (@procedure sysname = NULL, @revfl int = 1) AS SET NOCOUNT ON IF @revfl = 1 BEGIN PRINT '警告：该存储过程会删除并重建原始的存储过程。' PRINT ' 在运行该存储过程之前确保你的数据库有一个备份。' PRINT ' 该存储过程通常应该运行在产品环境的一个备份的非产品环境下。' PRINT ' 为了运行这个存储过程，将参数@refl的值更改为0。' RETURN 0 END DECLARE @intProcSpace bigint, @t bigint, @maxColID smallint,@intEncrypted tinyint,@procNameLength int select @maxColID = max(subobjid),@intEncrypted = imageval FROM sys.sysobjvalues WHERE objid = object_id(@procedure) GROUP BY imageval --select @maxColID as 'Rows in sys.sysobjvalues' select @procNameLength = datalength(@procedure) + 29 DECLARE @real_01 nvarchar(max) DECLARE @fake_01 nvarchar(max) DECLARE @fake_encrypt_01 nvarchar(max) DECLARE @real_decrypt_01 nvarchar(max),@real_decrypt_01a nvarchar(max) declare @objtype varchar(2),@ParentName nvarchar(max) select @real_decrypt_01a = '' --提取对象的类型如是存储过程还是函数，如果是触发器，还要得到其父对象的名称 select @objtype=type,@parentname=object_name(parent_object_id) from sys.objects where [object_id]=object_id(@procedure) -- 从sys.sysobjvalues里提出加密的imageval记录 SET @real_01=(SELECT top 1 imageval FROM sys.sysobjvalues WHERE objid = object_id(@procedure) and valclass = 1 order by subobjid) --创建一个临时表 create table #output ( [ident] [int] IDENTITY (1, 1) NOT NULL , [real_decrypt] NVARCHAR(MAX) ) --开始一个事务，稍后回滚 BEGIN TRAN --更改原始的存储过程，用短横线替换 if @objtype='P' SET @fake_01='ALTER PROCEDURE '+ @procedure +' WITH ENCRYPTION AS '+REPLICATE('-', 40003 - @procNameLength) else if @objtype='FN' SET @fake_01='ALTER FUNCTION '+ @procedure +'() RETURNS INT WITH ENCRYPTION AS BEGIN RETURN 1 /*'+REPLICATE('*', datalength(@real_01) /2 - @procNameLength)+'*/ END' else if @objtype='V' SET @fake_01='ALTER view '+ @procedure +' WITH ENCRYPTION AS select 1 as col /*'+REPLICATE('*', datalength(@real_01) /2 - @procNameLength)+'*/' else if @objtype='TR' SET @fake_01='ALTER trigger '+ @procedure +' ON '+@parentname+' WITH ENCRYPTION AFTER INSERT AS RAISERROR (''N'',16,10) /*'+REPLICATE('*', datalength(@real_01) /2 - @procNameLength)+'*/' EXECUTE (@fake_01) --从sys.sysobjvalues里提出加密的假的 SET @fake_encrypt_01=(SELECT top 1 imageval FROM sys.sysobjvalues WHERE objid = object_id(@procedure) and valclass = 1 order by subobjid ) if @objtype='P' SET @fake_01='Create PROCEDURE '+ @procedure +' WITH ENCRYPTION AS '+REPLICATE('-', 40003 - @procNameLength) else if @objtype='FN' SET @fake_01='CREATE FUNCTION '+ @procedure +'() RETURNS INT WITH ENCRYPTION AS BEGIN RETURN 1 /*'+REPLICATE('*', datalength(@real_01) /2 - @procNameLength)+'*/ END' else if @objtype='V' SET @fake_01='Create view '+ @procedure +' WITH ENCRYPTION AS select 1 as col /*'+REPLICATE('*', datalength(@real_01) /2 - @procNameLength)+'*/' else if @objtype='TR' SET @fake_01='Create trigger '+ @procedure +' ON '+@parentname+' WITH ENCRYPTION AFTER INSERT AS RAISERROR (''N'',16,10) /*'+REPLICATE('*', datalength(@real_01) /2 - @procNameLength)+'*/' --开始计数 SET @intProcSpace=1 --使用字符填充临时变量 SET @real_decrypt_01 = replicate(N'A', (datalength(@real_01) /2 )) --循环设置每一个变量，创建真正的变量 --每次一个字节 SET @intProcSpace=1 --如有必要，遍历每个@real_xx变量并解密 WHILE @intProcSpace<=(datalength(@real_01)/2) BEGIN --真的和假的和加密的假的进行异或处理 SET @real_decrypt_01 = stuff(@real_decrypt_01, @intProcSpace, 1, NCHAR(UNICODE(substring(@real_01, @intProcSpace, 1)) ^ (UNICODE(substring(@fake_01, @intProcSpace, 1)) ^ UNICODE(substring(@fake_encrypt_01, @intProcSpace, 1))))) SET @intProcSpace=@intProcSpace+1 END --通过sp_helptext逻辑向表#output里插入变量 insert #output (real_decrypt) select @real_decrypt_01 -- select real_decrypt AS '#output chek' from #output --测试 -- ------------------------------------- --开始从sp_helptext提取 -- ------------------------------------- declare @dbname sysname ,@BlankSpaceAdded int ,@BasePos int ,@CurrentPos int ,@TextLength int ,@LineId int ,@AddOnLen int ,@LFCR int --回车换行的长度 ,@DefinedLength int ,@SyscomText nvarchar(4000) ,@Line nvarchar(255) Select @DefinedLength = 255 SELECT @BlankSpaceAdded = 0 --跟踪行结束的空格。注意Len函数忽略了多余的空格 CREATE TABLE #CommentText (LineId int ,Text nvarchar(255) collate database_default) --使用#output代替sys.sysobjvalues DECLARE ms_crs_syscom CURSOR LOCAL FOR SELECT real_decrypt from #output ORDER BY ident FOR READ ONLY --获取文本 SELECT @LFCR = 2 SELECT @LineId = 1 OPEN ms_crs_syscom FETCH NEXT FROM ms_crs_syscom into @SyscomText WHILE @@fetch_status >= 0 BEGIN SELECT @BasePos = 1 SELECT @CurrentPos = 1 SELECT @TextLength = LEN(@SyscomText) WHILE @CurrentPos != 0 BEGIN --通过回车查找行的结束 SELECT @CurrentPos = CHARINDEX(char(13)+char(10), @SyscomText, @BasePos) --如果找到回车 IF @CurrentPos != 0 BEGIN --如果@Lines的长度的新值比设置的大就插入@Lines目前的内容并继续 While (isnull(LEN(@Line),0) + @BlankSpaceAdded + @CurrentPos-@BasePos + @LFCR) > @DefinedLength BEGIN SELECT @AddOnLen = @DefinedLength-(isnull(LEN(@Line),0) + @BlankSpaceAdded) INSERT #CommentText VALUES ( @LineId, isnull(@Line, N'') + isnull(SUBSTRING(@SyscomText, @BasePos, @AddOnLen), N'')) SELECT @Line = NULL, @LineId = @LineId + 1, @BasePos = @BasePos + @AddOnLen, @BlankSpaceAdded = 0 END SELECT @Line = isnull(@Line, N'') + isnull(SUBSTRING(@SyscomText, @BasePos, @CurrentPos-@BasePos + @LFCR), N'') SELECT @BasePos = @CurrentPos+2 INSERT #CommentText VALUES( @LineId, @Line ) SELECT @LineId = @LineId + 1 SELECT @Line = NULL END ELSE --如果回车没找到 BEGIN IF @BasePos <= @TextLength BEGIN --如果@Lines长度的新值大于定义的长度 While (isnull(LEN(@Line),0) + @BlankSpaceAdded + @TextLength-@BasePos+1 ) > @DefinedLength BEGIN SELECT @AddOnLen = @DefinedLength - (isnull(LEN(@Line),0) + @BlankSpaceAdded) INSERT #CommentText VALUES ( @LineId, isnull(@Line, N'') + isnull(SUBSTRING(@SyscomText, @BasePos, @AddOnLen), N'')) SELECT @Line = NULL, @LineId = @LineId + 1, @BasePos = @BasePos + @AddOnLen, @BlankSpaceAdded = 0 END SELECT @Line = isnull(@Line, N'') + isnull(SUBSTRING(@SyscomText, @BasePos, @TextLength-@BasePos+1 ), N'') if LEN(@Line) < @DefinedLength and charindex(' ', @SyscomText, @TextLength+1 ) > 0 BEGIN SELECT @Line = @Line + ' ', @BlankSpaceAdded = 1 END END END END FETCH NEXT FROM ms_crs_syscom into @SyscomText END IF @Line is NOT NULL INSERT #CommentText VALUES( @LineId, @Line ) select Text from #CommentText order by LineId CLOSE ms_crs_syscom DEALLOCATE ms_crs_syscom DROP TABLE #CommentText -- ------------------------------------- --结束从sp_helptext提取 -- ------------------------------------- --删除用短横线创建的存储过程并重建原始的存储过程 ROLLBACK TRAN DROP TABLE #output