SQL储存过程的解密

解密之后的调用方法

exec sp_decrypt '存储过程文件名'

解密方法

  1 CREATE PROCEDURE sp_decrypt(@objectName varchar(50))
  2 
  3 
  4 AS
  5 begin
  6 set nocount on
  7 
  8 --破解字节不受限制，适用于SQLSERVER2000存储过程，函数，视图，触发器
  9 
 10 begin tran
 11 declare @objectname1 varchar(100),@orgvarbin varbinary(8000)
 12 declare @sql1 nvarchar(4000),@sql2 varchar(8000),@sql3 nvarchar(4000),@sql4 nvarchar(4000)
 13 DECLARE @OrigSpText1 nvarchar(4000), @OrigSpText2 nvarchar(4000) , @OrigSpText3 nvarchar(4000), @resultsp nvarchar(4000)
 14 declare @i int,@status int,@type varchar(10),@parentid int
 15 declare @colid int,@n int,@q int,@j int,@k int,@encrypted int,@number int
 16 select @type=xtype,@parentid=parent_obj from sysobjects where id=object_id(@ObjectName)
 17 
 18 create table #temp(number int,colid int,ctext varbinary(8000),encrypted int,status int)
 19 insert #temp SELECT number,colid,ctext,encrypted,status FROM syscomments WHERE id = object_id(@objectName)
 20 select @number=max(number) from #temp
 21 set @k=0
 22 
 23 while @k<=@number 
 24 begin
 25 if exists(select 1 from syscomments where id=object_id(@objectname) and number=@k)
 26 begin
 27 if @type='P'
 28 set @sql1=(case when @number>1 then 'ALTER PROCEDURE '+ @objectName +';'+rtrim(@k)+' WITH ENCRYPTION AS '
 29 else 'ALTER PROCEDURE '+ @objectName+' WITH ENCRYPTION AS '
 30 end)
 31 
 32 if @type='TR'
 33 begin
 34 declare @parent_obj varchar(255),@tr_parent_xtype varchar(10)
 35 select @parent_obj=parent_obj from sysobjects where id=object_id(@objectName)
 36 select @tr_parent_xtype=xtype from sysobjects where id=@parent_obj
 37 if @tr_parent_xtype='V'
 38 begin
 39 set @sql1='ALTER TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION INSTERD OF INSERT AS PRINT 1 '
 40 end
 41 else
 42 begin
 43 set @sql1='ALTER TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION FOR INSERT AS PRINT 1 '
 44 end
 45 
 46 end
 47 if @type='FN' or @type='TF' or @type='IF'
 48 set @sql1=(case @type when 'TF' then 
 49 'ALTER FUNCTION '+ @objectName+'(@a char(1)) returns @b table(a varchar(10)) with encryption as begin insert @b select @a return end '
 50 when 'FN' then
 51 'ALTER FUNCTION '+ @objectName+'(@a char(1)) returns char(1) with encryption as begin return @a end'
 52 when 'IF' then
 53 'ALTER FUNCTION '+ @objectName+'(@a char(1)) returns table with encryption as return select @a as a'
 54 end)
 55 
 56 if @type='V'
 57 set @sql1='ALTER VIEW '+@objectname+' WITH ENCRYPTION AS SELECT 1 as f'
 58 
 59 set @q=len(@sql1)
 60 set @sql1=@sql1+REPLICATE('-',4000-@q)
 61 select @sql2=REPLICATE('-',8000)
 62 set @sql3='exec(@sql1'
 63 select @colid=max(colid) from #temp where number=@k 
 64 set @n=1
 65 while @n<=CEILING(1.0*(@colid-1)/2) and len(@sQL3)<=3996
 66 begin 
 67 set @sql3=@sql3+'+@'
 68 set @n=@n+1
 69 end
 70 set @sql3=@sql3+')'
 71 exec sp_executesql @sql3,N'@Sql1 nvarchar(4000),@ varchar(8000)',@sql1=@sql1,@=@sql2
 72 
 73 end
 74 set @k=@k+1
 75 end
 76 
 77 set @k=0
 78 while @k<=@number 
 79 begin
 80 if exists(select 1 from syscomments where id=object_id(@objectname) and number=@k)
 81 begin
 82 select @colid=max(colid) from #temp where number=@k 
 83 set @n=1
 84 
 85 while @n<=@colid
 86 begin
 87 select @OrigSpText1=ctext,@encrypted=encrypted,@status=status FROM #temp WHERE colid=@n and number=@k
 88 
 89 SET @OrigSpText3=(SELECT ctext FROM syscomments WHERE id=object_id(@objectName) and colid=@n and number=@k)
 90 if @n=1
 91 begin
 92 if @type='P'
 93 SET @OrigSpText2=(case when @number>1 then 'CREATE PROCEDURE '+ @objectName +';'+rtrim(@k)+' WITH ENCRYPTION AS '
 94 else 'CREATE PROCEDURE '+ @objectName +' WITH ENCRYPTION AS '
 95 end)
 96 
 97 
 98 if @type='FN' or @type='TF' or @type='IF'
 99 SET @OrigSpText2=(case @type when 'TF' then 
100 'CREATE FUNCTION '+ @objectName+'(@a char(1)) returns @b table(a varchar(10)) with encryption as begin insert @b select @a return end '
101 when 'FN' then
102 'CREATE FUNCTION '+ @objectName+'(@a char(1)) returns char(1) with encryption as begin return @a end'
103 when 'IF' then
104 'CREATE FUNCTION '+ @objectName+'(@a char(1)) returns table with encryption as return select @a as a'
105 end)
106 
107 if @type='TR' 
108 begin
109 
110 if @tr_parent_xtype='V'
111 begin
112 set @OrigSpText2='CREATE TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION INSTEAD OF INSERT AS PRINT 1 '
113 end
114 else
115 begin
116 set @OrigSpText2='CREATE TRIGGER '+@objectname+' ON '+OBJECT_NAME(@parentid)+' WITH ENCRYPTION FOR INSERT AS PRINT 1 '
117 end
118 end
119 
120 if @type='V'
121 set @OrigSpText2='CREATE VIEW '+@objectname+' WITH ENCRYPTION AS SELECT 1 as f'
122 
123 set @q=4000-len(@OrigSpText2)
124 set @OrigSpText2=@OrigSpText2+REPLICATE('-',@q)
125 end
126 else
127 begin
128 SET @OrigSpText2=REPLICATE('-', 4000)
129 end
130 SET @i=1
131 
132 SET @resultsp = replicate(N'A', (datalength(@OrigSpText1) / 2))
133 
134 WHILE @i<=datalength(@OrigSpText1)/2
135 BEGIN
136 
137 SET @resultsp = stuff(@resultsp, @i, 1, NCHAR(UNICODE(substring(@OrigSpText1, @i, 1)) ^
138 (UNICODE(substring(@OrigSpText2, @i, 1)) ^
139 UNICODE(substring(@OrigSpText3, @i, 1)))))
140 SET @i=@i+1
141 END
142 set @orgvarbin=cast(@OrigSpText1 as varbinary(8000))
143 set @resultsp=(case when @encrypted=1 
144 then @resultsp 
145 else convert(nvarchar(4000),case when @status&2=2 then uncompress(@orgvarbin) else @orgvarbin end)
146 end)
147 print @resultsp
148 
149 set @n=@n+1
150 
151 end
152 
153 end
154 set @k=@k+1
155 end
156 
157 drop table #temp
158 rollback tran
159 end