日期:2014-05-17  浏览次数:20910 次

表里有两个字段,如何用md5加密呢!
表里有两个字段是用户名和密码.有很多人都可以登到库里去,现在想用md5加密要使用什么方法加密呢!

------解决方案--------------------
也可以在oracle 中使用存储过程进行加密


--3.2.1 创建数据表
  --Drop Table Test_User;
  CREATE TABLE Test_User (
    UserName VARCHAR2(30) NOT NULL,
   Password VARCHAR2(2000) NOT NULL
  )
  /
  
  --3.2.2 创建程序包
  Create Or Replace Package Test_MD5 AS
    Function FN_GetMD5(P_Str In VarChar2)
     Return VarChar2;
    Function FN_CheckUser
     (P_UserName In VarChar2
       ,P_Password In VarChar2)
     Return Number;
  End;
  /
  CREATE OR REPLACE PACKAGE BODY Test_MD5 AS 
  
   FUNCTION FN_GetMD5 (P_Str IN VARCHAR2) 
    RETURN VARCHAR2 AS 
   BEGIN 
    RETURN DBMS_OBFUSCATION_TOOLKIT.MD5( 
     input_string => Upper(P_Str)); 
   END; 
   Function FN_CheckUser 
     (P_UserName IN VARCHAR2 
      ,P_Password IN VARCHAR2) 
    Return Number 
   Is 
     L_Password VarChar2(2000); 
   BEGIN 
    SELECT 
       Utl_Raw.Cast_To_Raw(Password) 
    INTO 
       L_Password 
    FROM  
       Test_User 
    WHERE  
       Upper(UserName) = UPPER(P_UserName); 
     If Utl_Raw.Cast_To_Raw(FN_GetMD5(P_Password))=L_Password Then 
      Return 1; 
     Else 
       Return 0; 
     End If; 
   EXCEPTION 
    WHEN NO_DATA_FOUND THEN 
     Return 0; 
   END; 
  End; 
  / 
  --3.3 测试
  Delete Test_User;
  Insert Into Test_User Values( 'A ',Test_MD5.FN_GetMD5( 'aa '));
  Insert Into Test_User Values( 'B ',Test_MD5.FN_GetMD5( 'bb '));
  Commit;
  Select Test_MD5.FN_CheckUser( 'a ', 'aa ') From Dual;
  Select Test_MD5.FN_CheckUser( 'a ', 'bb ') From Dual;