oracle安全应用角色例子

今天在做看OCP的时候有道题是关于应用安全角色的,不是很明白,在网上找了个例子按照步骤验证了下.
QUESTION 48
You want to create a role to meet these requirements:
1. The role is to be protected from unauthorized usage.
2. The password of the role is not to be embedded in the application source code or stored in a table.
Which method would you use to restrict enabling of such roles?
A. Create the role with external authentication.
B. Create the role as a secure application role.
C. Create the role as a password-protected role.
D. Create a role and use Fine-Grained Access Control (FGAC) to secure the role.
Correct Answer: B
Section: (none)
Explanation

有点:启用角色时通过包，而不是通过密码。
1.建立一个名为secure_user的应用用户，只有create session权限或其他权限，但不具有查询ldy用户下表的权限。
create user secure_user identified by oracle;
grant create session to secure_user;
 
2.创建1个安全角色，此时认证使用的过程包不需要已经存在(auth_role)。赋予对hxl.tb_test01表的查询权限。
create role secure_role identified using hxl.auth_role;
grant select on hxl.tb_test01 to secure_role;
 
3.创建权限信息表。目的是为了限制应用用户从指定IP连接上来才具有安全角色权限。
表结构如下
create table hxl.auth_roles
(
username varchar2(50),
role varchar2(50),
ip_address  varchar2(50),
enabled  number
);
表内容如下：
insert into ldy.auth_roles values ('SECURE_USER','SECURE_ROLE','192.168.2.84',1);
192.168.2.84这个是我客户端机器的ip,下面的存储过程需要通过该ip限制授权

4.创建验证的包和包体
需要包含AUTHID CURRENT_USER子句：
create or replace procedure ldy.auth_role
AUTHID CURRENT_USER
as
cursor vc is
SELECT role
FROM ldy.AUTH_ROLES
WHERE username = upper(sys_context('userenv','current_user'))
AND ip_address = upper(sys_context('userenv','ip_address'))
AND enabled=1;
v_role ldy.auth_roles.role%TYPE;
begin
open vc;
loop
 fetch vc into v_role;
  IF vc%ROWCOUNT = 0 THEN
    raise_application_error(-20123,'This IP has Invalid Privilege',false);
  END IF;
 exit when vc%notfound; /*客户端ip和用户都满足查询条件才设置权限*/
 dbms_session.set_role(v_role);
end loop;
exception
  when others then
  dbms_output.put_line(dbms_utility.format_error_stack);
END;

5.分配权限

grant execute on hxl.auth_role to secure_user;
grant select on hxl.auth_roles to secure_user;
grant secure_role to secure_user;
alter user secure_user default role all except secure_role;
 
6.测试连接
从IP 192.168.2.84连接
$ sqlplus secure_user/oracle@three_slnngk

SQL> exec hxl.auth_role;
 
PL/SQL procedure successfully completed.
 
SQL> select count(*) from hxl.tb_test;
 
  COUNT(*)
----------
     10
 
从其他IP连接
$ sqlplus secure_user/oracle@three_slnngk

SQL> exec hxl.auth_role;
 
PL/SQL procedure successfully completed.
 
SQL> select count(*) from hxl.tb_test;
select count(*) from hxl.tb_test
                         *
ERROR at line 1:
ORA-00942: table or view does not exist
 
 
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