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

 

 

转载于:https://www.cnblogs.com/DanielChow/archive/2010/09/04/1817656.html

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