[转帖]SQL Server 2000 之存储过程解密

zhuyiwen

转自：微软亚洲技术社区

作者：net2004



以下是一个解密存储过程的存储过程，这年头什么都不保鲜！

试试看，不错的！但是不要忘记备份吧，这个是有破坏性的！

1. ------------------------sql2000大于40000的-----------------
   
   
2. 
   
   
3. create PROCEDURE sp_decrypt_sp1 (@objectName varchar(50))
   
   
4. AS
   
   
5. begin
   
   
6. declare @objectname1 varchar(100)
   
   
7. declare @sql1 nvarchar(4000),@sql2 nvarchar(4000),@sql3 nvarchar(4000),@sql4 nvarchar(4000),@sql5 nvarchar(4000),@sql6 nvarchar(4000),@sql7 nvarchar(4000),@sql8 nvarchar(4000),@sql9 nvarchar(4000),@sql10 nvarchar(4000)
   
   
8. DECLARE @OrigSpText1 nvarchar(4000), @OrigSpText2 nvarchar(4000) , @OrigSpText3 nvarchar(4000), @resultsp nvarchar(4000)
   
   
9. declare @i int , @t bigint
   
   
10. declare @m int,@n int,@q int
    
    
11. set @m=(SELECT max(colid) FROM syscomments WHERE id = object_id(@objectName))
    
    
12. set @n=1
    
    
13. --get encrypted data
    
    
14. create table #temp(colid int,ctext varbinary(8000))
    
    
15. insert #temp SELECT colid,ctext FROM syscomments WHERE id = object_id(@objectName)
    
    
16. set @sql1='ALTER PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '
    
    
17. --set @sql1='ALTER PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '
    
    
18. set @q=len(@sql1)
    
    
19. set @sql1=@sql1+REPLICATE('-',4000-@q)
    
    
20. select @sql2=REPLICATE('-',4000),@sql3=REPLICATE('-',4000),@sql4=REPLICATE('-',4000),@sql5=REPLICATE('-',4000),@sql6=REPLICATE('-',4000),@sql7=REPLICATE('-',4000),@sql8=REPLICATE('-',4000),@sql9=REPLICATE('-',4000),@sql10=REPLICATE('-',4000)
    
    
21. exec(@sql1+@sql2+@sql3+@sql4+@sql5+@sql6+@sql7+@sql8+@sql9+@sql10)
    
    
22. while @n<=@m
    
    
23. begin
    
    
24. SET @OrigSpText1=(SELECT ctext FROM #temp WHERE colid=@n)
    
    
25. set @objectname1=@objectname+'_t'
    
    
26. SET @OrigSpText3=(SELECT ctext FROM syscomments WHERE id=object_id(@objectName) and colid=@n)
    
    
27. if @n=1
    
    
28. begin
    
    
29. SET @OrigSpText2='CREATE PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '--
    
    
30. set @q=4000-len(@OrigSpText2)
    
    
31. set @OrigSpText2=@OrigSpText2+REPLICATE('-',@q)
    
    
32. end
    
    
33. else
    
    
34. begin
    
    
35. SET @OrigSpText2=REPLICATE('-', 4000)
    
    
36. end
    
    
37. --start counter
    
    
38. SET @i=1
    
    
39. --fill temporary variable
    
    
40. SET @resultsp = replicate(N'A', (datalength(@OrigSpText1) / 2))
    
    
41. 
    
    
42. --loop
    
    
43. WHILE @i<=datalength(@OrigSpText1)/2
    
    
44. BEGIN
    
    
45. --reverse encryption (XOR original+bogus+bogus encrypted)
    
    
46. SET @resultsp = stuff(@resultsp, @i, 1, NCHAR(UNICODE(substring(@OrigSpText1, @i, 1)) ^
    
    
47. (UNICODE(substring(@OrigSpText2, @i, 1)) ^
    
    
48. UNICODE(substring(@OrigSpText3, @i, 1)))))
    
    
49. SET @i=@i+1
    
    
50. END
    
    
51. --drop original SP
    
    
52. --EXECUTE ('drop PROCEDURE '+ @objectName)
    
    
53. --remove encryption
    
    
54. --preserve case
    
    
55. SET @resultsp=REPLACE((@resultsp),'WITH ENCRYPTION', '')
    
    
56. SET @resultsp=REPLACE((@resultsp),'With Encryption', '')
    
    
57. SET @resultsp=REPLACE((@resultsp),'with encryption', '')
    
    
58. IF CHARINDEX('WITH ENCRYPTION',UPPER(@resultsp) )>0
    
    
59. SET @resultsp=REPLACE(UPPER(@resultsp),'WITH ENCRYPTION', '')
    
    
60. --replace Stored procedure without enryption
    
    
61. print @resultsp
    
    
62. --execute( @resultsp)
    
    
63. set @n=@n+1
    
    
64. end
    
    
65. drop table #temp
    
    
66. end
    
    
67. GO

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