[FZH] Fwd: 请教大家关于PAM 相关的问题

[Guannan Ma]

已经获得答案. 请忽略该thread.. thx anyway.

2010/11/25 Guannan Ma <mythmgn在gmail.com>

>
>
> ---------- Forwarded message ----------
> From: Guannan Ma <mythmgn在gmail.com>
> Date: 2010/11/25
> Subject: 请教大家关于PAM 相关的问题
> To: chinese在lists.fedoraproject.org
>
>
> Hi, all,
> 最近才开始关注PAM验证方面的问题, 请大家帮忙解答下我的疑问.
> 先谢谢了 :)
>
>
> *[1] 第一个问题是关于PAM 里面的session的*
>
> PAM里面的session管理主要提供了两个函数,pam_
> open_session pam_close_session
>
> 我的疑问是, 我open session之后, 得到了什么样的环境. 在我执行过open_session之后? PAM为我做了什么?
> 在pam_open_session 和pam_close_session之间 我得到了什么特权? 或者说什么样的特殊环境.
>
>
> *[2] 第二个问题关于PAM 里的设置credential*
>
> 我援引一下pam的函数介绍.
>
> On a Linux system the user's UID and GID's are credentials too. However, it
> has been decided that these properties (along with the default supplementary
> groups of which the user is a member) are credentials that should be set
> directly by the application and not by PAM. Such credentials should be
> established, by the application, prior to a call to this function. For
> example, initgroups(2) (or equivalent) should have been performed.
>
> 这句话, 也就是说我程序的组设置和uid设置, 是先于setcredential的. 那我设置这个credential 有啥用处?我用它来做什么?
>
>
> int pam_setcred(pamh,
>  flags);
> pam_handle_t *pamh;
> int flags;
>
>
> 3.1.8.1. DESCRIPTION
>
> The pam_setcred function is used to establish, maintain and delete the
> credentials of a user. It should be called to set the credentials after a
> user has been authenticated and before a session is opened for the user
> (with pam_open_session(3)). The credentials should be deleted after the
> session has been closed (with pam_close_session(3)).
>
> A credential is something that the user possesses. It is some property,
> such as a Kerberos ticket, or a supplementary group membership that make up
> the uniqueness of a given user. On a Linux system the user's UID and GID's
> are credentials too. However, it has been decided that these properties
> (along with the default supplementary groups of which the user is a member)
> are credentials that should be set directly by the application and not by
> PAM. Such credentials should be established, by the application, prior to a
> call to this function. For example, initgroups(2) (or equivalent) should
> have been performed.
>
>
>
> PAM的文档搜索起来很费劲.. 大部分的实例都是关于auth方面的..  这个session方面的比较少.
> 请懂这方面的朋友给我示意下 这个session到底能做些什么?
>
> 我现在在做C/S server端的开发.. 想引入pam做用户管理 最近在想这个用户对话的保存, 不知道pam是否能满足条件.
>
>
> 再次致谢.
>
> --
> Regards,
> Guannan
>
>
>
> --
> Regards,
> Guannan
>
>


-- 
Regards,
Guannan