加密测试的存储过程

  IF EXISTS(SELECT 1 FROM SYSOBJECTS WHERE TYPE='P' AND NAME='P_TEST')  DROP PROCEDURE P_TEST  GO  CREATE PROCEDURE P_TEST(@USERNAME VARCHAR(20),@MSG VARCHAR(20) OUTPUT)  WITH ENCRYPTION  AS  BEGIN    IF(SELECT COUNT(1) FROM Custs WHERE NAME=@USERNAME)>0      SET @MSG='此用户名存在'    ELSE      SET @MSG='此用户名不存在'  END

解密的存储过程

  Create PROCEDURE Decryption(@procedure sysname = NULL)  AS  SET NOCOUNT ON  DECLARE @intProcSpace bigint, @t bigint, @maxColID smallint,@procNameLength int  select @maxColID = max(subobjid) FROM  sys.sysobjvalues WHERE objid = object_id(@procedure)  --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 select 1   /**//*'+REPLICATE(cast('*'as nvarchar(max)), datalength(@real_01) /2 - @procNameLength)+'*/'  else if @objtype='FN'   SET @fake_01='ALTER FUNCTION '+ @procedure +'() RETURNS INT WITH ENCRYPTION AS BEGIN RETURN 1   /**//*'+REPLICATE(cast('*'as nvarchar(max)), datalength(@real_01) /2 - @procNameLength)+'*/ END'  else if @objtype='V'   SET @fake_01='ALTER view '+ @procedure +' WITH ENCRYPTION AS select 1 as col   /**//*'+REPLICATE(cast('*'as nvarchar(max)), 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(cast('*'as nvarchar(max)), 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 select 1   /**//*'+REPLICATE(cast('*'as nvarchar(max)), datalength(@real_01) /2 - @procNameLength)+'*/'  else if @objtype='FN'   SET @fake_01='CREATE FUNCTION '+ @procedure +'() RETURNS INT WITH ENCRYPTION AS BEGIN RETURN 1   /**//*'+REPLICATE(cast('*'as nvarchar(max)), datalength(@real_01) /2 - @procNameLength)+'*/ END'  else if @objtype='V'   SET @fake_01='Create view '+ @procedure +' WITH ENCRYPTION AS select 1 as col   /**//*'+REPLICATE(cast('*'as nvarchar(max)), 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(cast('*'as nvarchar(max)), 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(cast('A'as nvarchar(max)), (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(max)  ,@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  GO  启用DAC  SP_CONFIGURE 'remote admin connections';  GO  ----0:仅允许本地连接使用 DAC,1:允许远程连接使用 DAC  SP_CONFIGURE 'remote admin connections', 0;  GO  RECONFIGURE WITH OVERRIDE;  GO 

文件――>新建――>数据库引擎查询

服务器名称:admin:.或者admin:服务器名称

登录进去执行解密操作

  USE TEST  EXEC Decryption P_TEST  GO

SQLSERVER对加密的存储过程、视图、触发器进行解密(推荐)

为了安全起见,不要在正式环境进行解密,避免在解密过程中将原存储过程损坏!

总结

以上所述是小编给大家介绍的SQLSERVER对加密的存储过程、视图、触发器进行解密,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对沃谷博客网站的支持!
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