如何破解函数加密

kissbk

如何破解函数加密。听说有个系统自代的方法。

seaeva

破解SQL SERVER 加密存储过程,函数,触发器,视图
create PROCEDURE sp_decrypt(@objectName varchar(50))
AS
begin
set nocount on
--破解字节不受限制，适用于SQLSERVER存储过程，函数，视图，触发器
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\'
set @sql1=\'ALTER TRIGGER \'+@objectname+\' ON \'+OBJECT_NAME(@parentid)+\' WITH ENCRYPTION FOR INSERT AS PRINT 1 \'

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\'--刚才有错改一下
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\'
set @OrigSpText2=\'CREATE TRIGGER \'+@objectname+\' ON \'+OBJECT_NAME(@parentid)+\' WITH ENCRYPTION FOR INSERT AS PRINT 1 \'

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