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手册页第 5 部分:标准、环境和宏     Oracle Solaris 11 Information Library (简体中文)
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前言

简介

标准、环境和宏

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pam_authtok_get

- authentication and password management module

用法概要

pam_authtok_get.so.1

描述

The pam_authtok_get service module provides password prompting funtionality to the PAM stack. It implements pam_sm_authenticate() and pam_sm_chauthtok(), providing functionality to both the Authentication Stack and the Password Management Stack.

Authentication Service

The implementation of pam_sm_authenticate(3PAM) prompts the user name if not set and then tries to get the authentication token from the pam handle. If the token is not set, it then prompts the user for a password and stores it in the PAM item PAM_AUTHTOK. This module is meant to be the first module on an authentication stack where users are to authenticate using a keyboard.

Password Management Service

Due to the nature of the PAM Password Management stack traversal mechanism, the pam_sm_chauthtok(3PAM) function is called twice. Once with the PAM_PRELIM_CHECK flag, and one with the PAM_UPDATE_AUTHTOK flag.

In the first (PRELIM) invocation, the implementation of pam_sm_chauthtok(3PAM) moves the contents of the PAM_AUTHTOK (current authentication token) to PAM_OLDAUTHTOK, and subsequentially prompts the user for a new password. This new password is stored in PAM_AUTHTOK.

If a previous module has set PAM_OLDAUTHTOK prior to the invocation of pam_authtok_get, this module turns into a NO-OP and immediately returns PAM_SUCCESS.

In the second (UPDATE) invocation, the user is prompted to Re-enter his password. The pam_sm_chauthtok implementation verifies this reentered password with the password stored in PAM_AUTHTOK. If the passwords match, the module returns PAM_SUCCESS.

The following option can be passed to the module:

debug

syslog(3C) debugging information at the LOG_DEBUG level

错误

The authentication service returns the following error codes:

PAM_SUCCESS

Successfully obtains authentication token

PAM_SYSTEM_ERR

Fails to retrieve username, username is NULL or empty

The password management service returns the following error codes:

PAM_SUCCESS

Successfully obtains authentication token

PAM_AUTHTOK_ERR

Authentication token manipulation error

属性

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT Level
MT-Safe with exceptions

另请参见

pam(3PAM), pam_authenticate(3PAM), syslog(3C), libpam(3LIB), pam.conf(4), attributes(5), pam_authtok_check(5), pam_authtok_store(5), pam_dhkeys(5), pam_passwd_auth(5), pam_unix_account(5), pam_unix_auth(5), pam_unix_session(5)

附注

The interfaces in libpam(3LIB) are MT-Safe only if each thread within the multi-threaded application uses its own PAM handle.