转载 解密 用with encryption 加密的 sql server 存储过程
create PROCEDURE [dbo].[jiemi] (@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 -- ------------------------------------- ROLLBACK TRAN DROP TABLE #output 执行上面的存储过程方法为: exec jiemi '数据库名.dbo.你要解密的存储过程名',0 在执行上面的语句后出现错误: 对象名'sys.sysobjvalues'无效 主要原因是我们没有用DAC模式登陆,下面是解决办法: 第一步:允许DAC模式 (1)如果是在本地服务器做DAC的话用:sqlcmd -A (A一定要大写,要不然不好用哦) 用这个命令就可以很轻松的连接上,连接上以后在里面写语句就可以,语句写玩了要运行GO这个命令。 (2)如果要做远程连接DAC的话需要用: sqlcmd -S 服务器名 -U sa(一个是sysadmin角色的登陆帐户就可以了)-P(密码)-A就可以了 启用远程DAC登录选项: 操作步骤:'程序'->'Sql Server2005'-> '配置工具'-> 'Sql Server 外围应用配置器'-> '功能的外围应用配置器'-> 'DataBase Engine'-> 'DAC' -> '启用远程DAC' 这样DAC模式就启用成功了,接下来是使用DAC模式登陆。 第二步:使用DAC模式登陆(关键就在这个地方) 1,DAC只支持一个窗口 2,DAC只支持查询窗口, 不支持Object Explorer. 如果你想在SQL Server Management Studio中用DAC连, 你应该用个正常的连接, 然后用DAC打开查询窗口. 下面是操作步骤: 1,先用有sysadmin角色的用户登陆SQL Server Management Studio,随便sa就可以了; 2,新建查询,在弹出的连接对话框中,服务器名称改为 ADMIN:服务器名称;然后,选项->连接属性->连接到数据库 改为加密存储过程所在的数据库->连接即可. 3,最后执行上面的存储过程方法; 以上是解决办法,希望对大家有用,上面转载的有些不知道出处,如果侵犯了您的权益请及时联系,我将在第一时间更新...