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sm_user密码破解.sql

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+use [BS3000+_SYSTEM] 
+
+GO
+IF EXISTS (SELECT 1 FROM SYS.objects WHERE OBJECT_ID = OBJECT_ID(N'[DBO].[fn_sm_user]') AND TYPE IN (N'FN', N'IF', N'TF', N'FS', N'FT'))
+DROP FUNCTION fn_sm_user
+GO
+
+create function fn_sm_user(@psw varchar(100))
+returns varchar(50)
+as 
+begin 
+	declare @result varchar(50),		--结果
+			@cout int,					--每3位一组数量
+			@psw_new varchar(100),		--新秘钥
+			@num int			--截取3位数
+	
+	set @result = ''		
+	set @psw = REPLACE(@psw,'/U','')
+	set @psw_new = REPLACE(@psw,'+','')
+	set @cout = LEN(@psw)/3
+	
+	if @cout=0
+		begin
+			set @result = '无密码'
+		end
+	else
+		begin
+			WHILE LEN(@psw_new)>0 
+				begin
+					select @num = cast(SUBSTRING(@psw_new,1,3) as int)
+						begin
+							IF @num<126
+								begin 
+									select @num=@num - 111
+								end
+							else 
+								begin
+									while(@num>=126) 
+										begin
+											select @num=@num - 111
+										end
+								end
+							select @result=@result + cast(CHAR(@num) as CHAR(1))
+						end
+					select @psw_new = STUFF(@psw_new,1,3,'')
+				
+				end
+		end
+	
+return (@result)		
+end
+
+
+
+
+go
+
+select vusercode,vusername,dbo.fn_sm_user(vpassword) from sm_user