Cryptographic decryption of SQL Server storage functions

server| Function | encryption | decryption

Encryption of stored procedures, stored functions: 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

The decryption of stored procedures and stored functions (the following is a code written by a very tall person)

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

/*--cracked functions, procedures, triggers, views. Limited to SQLSERVER2000

--Author: j9988--*/

/*--Call Example

--Decrypt the specified stored procedure

exec sp_decrypt ' appsp_test '

--Decryption of all stored procedures

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 '/*-------stored procedure [' + @name + ']-----------* *

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

--crack byte unrestricted, apply to SQLSERVER2000 stored procedures, functions, views, triggers

--Fixed previous view triggers do not correctly decrypt errors

--Find fault, please e_mail:csdnj9988@tom.com

BEGIN Tran

DECLARE @objectname1 varchar (@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 (a), @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) + ' and 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) 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"

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) 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"

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